22.A New Approach for FEC Decoding Based on the BP Algorithm in LTE and WiMAX Systems
Many wireless communication systems such as IS- 54, enhanced data rates for the GSM evolution (EDGE), worldwide interoperability for microwave access (WiMAX) and long term evolution (LTE) have adopted low-density parity-check (LDPC), tail-biting convolutional, and turbo codes as the forward error correcting codes (FEC) scheme for data and overhead channels. Therefore, many efficient algorithms have been proposed for decoding these codes. However, the different decoding approaches for these two families of codes usually lead to different hardware architectures. Since these codes work side by side in these new wireless systems, it is a good idea to introduce a universal decoder to handle these two families of codes. The present work exploits the parity-check matrix (H) representation of tailbiting convolutional and turbo codes, thus enabling decoding via a unified belief propagation (BP) algorithm. Indeed, the BP algorithm provides a highly effective general methodology for devising low-complexity iterative decoding algorithms for all convolutional code classes as well as turbo codes. While a small performance loss is observed when decoding turbo codes with BP instead of MAP, this is offset by the lower complexity of the BP algorithm and the inherent advantage of a unified decoding architecture.
- For analysis purposes the packet-loss process resulting from the single-multiplexer model was assumed to be independent and, consequently, the simulation results provided show that this simplified analysis considerably overestimates the performance of FEC.
- Evaluation of FEC performance in multiple session was more complex in existing applications.
- Surprisingly, all numerical results given indicates that the resulting residual packet-loss rates with coding are always greater than without coding, i.e., FEC is ineffective in this application.
- The increase in the redundant packets added to the data will increase the performance, but it will also make the data large and it will also lead to increase in data loss.
- In this work we have evaluated the performance of FEC coding more accurately than previous works.
- We have reduced the complexity in multiple session and introduced a simple way for its implementation.
- We show that the unified approach provides an integrated framework for exploring the tradeoffs between the key coding parameters: specifically, Interleaving depths, channel coding rates and block lengths.
- Thus by choosing the coding parameter appropriately we have achieved high performance of FEC, reduced the time delay for Encoding and Decoding with Interleaving.
PROCESSOR : PENTIUM IV 2.6 GHz
RAM : 512 MB
MONITOR : 15”
HARD DISK : 20 GB
CDDRIVE : 52X
FRONT END : JAVA, SWING
TOOLS USED : JFRAME BUILDER
OPERATING SYSTEM: WINDOWS XP
Modules of the Project
• FEC Encoder
• Implementation of the Queue
• FEC Decoder
• Performance Evaluation
1. FEC Encoder:
FEC is a system of error control for data transmission, where the sender adds redundant data to its messages. This allows the receiver to detect and correct errors (within some bounds) without the need to ask the sender for additional data. In this module we add redundant data to the given input data, known as FEC Encoding.
The text available in the input text file is converted into binary. The binary conversion is done for each and every character in the input file. Then we add the redundant data for each bit of the binary. After adding we have a block of packets for each character.
The User Interface design is also done in this module. We use the Swing package available in Java to design the User Interface. Swing is a widget toolkit for Java. It is part of Sun Microsystems' Java Foundation Classes (JFC) — an API for providing a graphical user interface (GUI) for Java programs.
Interleaving is a way of arranging data in a non-contiguous way in order to increase performance. It is used in data transmission to protest against burst errors. In this module we arrange the data (shuffling) to avoid burst errors which is useful to increase the performance of FEC Encoding.
This module gets the input as blocks of bits from the FEC Encoder. In this module we shuffle the bits inside a single block in order to convert burst errors into random errors. This shuffling process is done for each and every block comes from the FEC Encoder. Then we create a Socket connection to transfer the blocks from Source to the Queue. This connection is created by using the Server Socket and Socket class Available in Java.
3. Implementation of the Queue:
In this module we receive the data from the Source system. This data is the blocks after FEC Encoding and Interleaving processes are done. These blocks come from the Source system through Server Socket and Socket. Server socket and Socket are classes available inside Java. These two classes are used to create a connection between two systems inside a network for data transmission. After we receive the packets from Source, we create packet loss. Packet loss is a process of deleting the packets randomly. After creating loss we send the remaining blocks to the Destination through the socket connection.
This module receives the blocks of data from the Queue through the socket connection. These blocks are the remaining packets after the loss in the Queue. In this module we re arrange the data packets inside a block in the order in which it is before Interleaving. This process of Interleaving and De-Interleaving is done to convert burst errors into random errors. After De-Interleaving the blocks are arranged in the original order. Then the data blocks are sent to the FEC Decoder.
5. FEC Decoder:
This module gets the input from the De-Interleaver. The received packets are processed to remove the original bits from it. Thus we recover the original bits of a character in this module. After retrieving the original bits, we convert it to characters and write it inside a text file.
6. Performance Evaluation:
In this module we calculate the overall performance of FEC Coding in recovering the packet losses. After retrieving the original bits, we convert it to characters and write it inside a text file. This performance is calculated by using the coding parameters like Coding rate, Interleaving depth, Block length and several other parameters. First we calculate the amount of packet loss and with it we use various formulas to calculate the overall performance of Forward Error Correction in recovering the network packet losses.
In module given input and expected output
Packets coded with redundant data.
Packets coded with redundant data.
Packets shuffled inside every block of data.
Packets passed successfully (other than lost packets)
Packets from the queue
Packets re-ordered like it was before Interleaving
Packets from De-Interleaver
All the parameters used in FEC Coding
Output file and the calculations result
Ahmed Refaey, Sebastien Roy and Paul Fortier, “A New approach for FEC Decoding based on the BP algorithm in LTE and WiMAX Systems”, IEEE Conference 2011.


Gravity Assist, also known as gravitational sling shot or gravity slingshot, is a technique employed by spacecraft to gain speed, alter trajectory, and conserve fuel during interplanetary missions. By leveraging the gravitational pull of celestial bodies, such as planets or moons, spacecraft can harness the energy of these gravitational fields to enhance their missions. This article explores the mechanics of gravity assist and provides examples of its successful applications.
Mechanics of Gravity Assist
Gravity assist relies on the principle of conservation of energy and momentum. As a spacecraft approaches a massive celestial body, it enters its gravitational field, where it experiences a gravitational pull. By carefully planning the trajectory, the spacecraft can use the planet's gravity to gain or lose speed and change direction. During the flyby, the spacecraft exchanges momentum with the celestial body, thereby altering its own trajectory without the need for additional propulsion.
Speed Boost and Trajectory Alteration
When a spacecraft approaches a planet or moon for a gravity assist, it executes a close flyby to gain or lose velocity. By carefully selecting the trajectory and the direction of the flyby, the spacecraft can gain a significant speed boost, effectively "stealing" a fraction of the planet's orbital energy. This allows the spacecraft to accelerate, change direction, or reach destinations that would otherwise be challenging or resource-intensive to achieve solely through onboard propulsion.
The spacecraft gains additional velocity during the gravity assist maneuver at a specific moment known as the closest approach or periapsis. As the spacecraft approaches the planet, it moves in the same direction as the planet's orbital motion. The spacecraft exchanges momentum with the planet, effectively "borrowing" a portion of the planet's orbital energy. This exchange of momentum causes the spacecraft's velocity to increase.
However, it's important to note that the gravity assist does not involve the burning of thrusters on the spacecraft. The velocity gain is achieved purely through the exchange of momentum with the planet. The spacecraft does not expend additional propellant during the gravity assist maneuver.
After passing the periapsis and moving away from the planet, the spacecraft continues on its new trajectory with the gained velocity. As it moves farther from the planet, the gravitational influence weakens, causing the spacecraft's velocity to gradually decrease. However, the spacecraft retains a portion of the gained velocity, allowing it to continue its mission with an altered trajectory or increased speed relative to its pre-gravity assist state.
Fuel Efficiency and Mission Enhancements
Gravity assist maneuvers offer significant benefits in terms of fuel efficiency. By utilizing the gravitational forces of celestial bodies, spacecraft can conserve precious onboard fuel that would otherwise be required for propulsion. This fuel efficiency translates into extended mission durations, increased payload capacity, or the ability to reach distant destinations within feasible timeframes.
Use of this principle in Chandrayaan Missions
The Lunar Vehicle Module 3 (LVM3) used in the mission is not as powerful as the NASA's Saturn 5 rockets, which allows for a more cost-effective approach. Instead of following a direct path, the spacecraft takes an elliptical orbit around the earth, utilizing gravitational forces to gain speed and momentum. This strategic trajectory enables Chandrayaan-3 to conserve fuel while still reaching its lunar destination. That is also the reason why Chandrayaan taking around 40 days to reach Moon.
Other examples where Gravity Assist was used.
Voyager Missions: The Voyager 1 and Voyager 2 spacecraft executed multiple gravity assist maneuvers to explore the outer planets of our solar system. The gravity assists from Jupiter and Saturn provided velocity boosts and altered their trajectories, enabling them to continue their interstellar missions.
Cassini-Huygens: The Cassini spacecraft utilized gravity assists from Venus, Earth, and Jupiter to reach Saturn and its moons. These maneuvers saved fuel, reduced mission time, and facilitated extended exploration of Saturn's system, including the successful landing of the Huygens probe on Titan.
New Horizons: The New Horizons mission to Pluto employed a gravity assist from Jupiter, which accelerated the spacecraft, reduced the travel time, and enhanced its scientific observations during the Pluto flyby.
Gravity assist is a powerful technique that allows spacecraft to leverage the gravitational fields of celestial bodies for speed boosts, trajectory alterations, and fuel conservation. This ingenious maneuvering method has been successfully utilized in numerous interplanetary missions, enabling extended explorations, precise flybys, and access to distant destinations. As space exploration continues to evolve, gravity assist remains an invaluable tool for unlocking the mysteries of our solar system and beyond.


Best bluetooth headset blackjack ii
Buying a Bluetooth headset on Black Friday. If you're buying a gadget of any kind, whether that's a TV, smartphone, or Bluetooth headset, Black Friday and Cyber Monday are often the best time to. Nov 15, · The best budget Bluetooth headset: Plantronics Voyager Why you should buy this: With an arm for superior audio and a seven-hour battery life, this is . The best Bluetooth headsets go with Bluetooth and higher ( is the latest one). Battery life. The second important feature you must find out is the battery life or the period of time your Bluetooth headset will work without a need of recharging.
Voice Command 1.6 on WM6 Blackjack II - no audio out
Halcyon Solutions Inc. VC actually is working, since if I time it just right guessing where the confirmation prompts would be I can activate a call. The device seems quite sturdy in construction but is a bit heavy feeling and unbalanced when in-ear. After all, your ear is not usually in your line of vision. Expected battery life hours. Once paired, the H15 is ready for use.
BH50 Wireless Bluetooth Headset, Black
As its name suggests, this is an updated version of a model that debuted in late The new device has a number of improvements over its predecessor, including an upgraded operating system, more memory, and a GPS receiver. This smartphone uses a design that become fairly common: a slim tablet shape with a QVGA display and a keyboard. The reason so many devices use this form factor is simple: it works.
The buttons seem good, and I had no problems using this device for several weeks. To get its svelte shape, Samsung sacrificed a bit of screen size. The BlackJack II includes a 2. All these devices have the same number of pixels — by — but the BlackJack packs them into a smaller area.
This reduced screen real estate is definitely noticeable, as text is smaller and so are images. In addition, this display has a landscape orientation, while Windows Mobile works best in a portrait mode. With a landscape device, the bars that run across the top and bottom of the screen in most applications take up a significant amount of room. These can be hidden in a few situations, but most of the time they are in the way.
In addition, the slick surface of the keys makes accidentally hitting the neighboring key even easier. Easily my favorite feature in this whole device is the combination D-pad and scrollwheel. I had no problems with dropped calls, and reception was fine. No one complained about voice quality when I was talking to them. Better yet, all these wireless functions will work overseas.
Motorola H Bluetooth headset according to the specification sheet has seven hours talk time. The downside of this is that it has a slightly bulkier design than the H However even though the H is more bulky than the H15 it actually weighs less at 11g.
The Motorola H does not have the flip design like the H15 it does have a handy power slide that you can see at a glance if the power is on or not. Motorola has released a new folding boom design headset, the MOTOPURE H15, that resurrects the old style of its popular HS headset from some years back but provides some new updates both externally and internally, including the company's improved CrystalTalk noise suppression technology.
The headset itself is quite compact in size, especially when compared to its older cousin, the HS The H15 is quite small but not overly tiny as some headsets found on the market today.
The device seems quite sturdy in construction but is a bit heavy feeling and unbalanced when in-ear. The headset ships with a clear plastic ear hook to help offset the awkwardness of its weight and it helps keep the headset in place when walking or moving.
Even though the headset ships with various sizes of ear pieces, we just couldn't seem to find the right size and hope Motorola in the future does some work using gels like those on the Plantronics Discovery Sporting a glossy piano black face, the headset is minimalistically designed with only 2 real buttons: a large multi-function button that handles most tasks and a volume rocker located on the edge of the H A tiny LED indicator sits smack in the middle of the rocker and is quite discreet when the headset is in use.
Танкадо передает ключ победителю аукциона, и получившая его компания вскрывает Цифровую крепость. Сознания обеих машин опять вступили в осторожный контакт, а Элвин раздумывал над смыслом услышанного. Just then, Mick showed up and helped her out by sucking on her great tits.


There are multiple types of the monitor available in the market
These are the monitors that communicate to each other with the help of a specific frequency. If a hacker knows about the frequency that is being used by the radio frequency the transmission can be easily intercepted? But if the hacker does not know about the communication channel frequency this will not be possible for the hacker to hack the monitor. The monitor manufacturer has a solution to this problem. This solution is a very solid and effective one. What they do is they make the communication frequency intercepted. As the frequency is unknown to hackers. It is really difficult to hack the monitor. Therefore this is highly recommended that you buy the monitor from the manufacturer who uses the encrypted frequency for the channel of communication.
It really saves your monitor from being hacked and provides you with ease of mind.
The Wi-Fi monitor broadcasts the image to your mobile and calls any other remote device. That thing will be Cup Messi because the Wi-Fi monitor is linked to the local Wi-Fi of your house full stock through this Wi-Fi it is linked with the internet. Due to multiple connectivities, it is relatively easy to Breach the security of this Wi-Fi. Once the person is able to Breach the security he or she will be able to broadcast the image to any MI website. Moreover, it has been observed that the people started to give instructions to babies through the speaker off the monitor. Even then the higher security and profile monitors are available that have advanced security systems. Due to these advanced UT systems, it is really difficult to hack these communication devices
Before we try to stop the hackers from the illegal and unethical activity which they are going to perform by hacking the monitors. It is really important to understand first why hackers do this type of activity.


Alibaba com offers 1 711 vibrating screen transducers products A wide variety of vibrating screen transducers options are available to you such as theory usage and amplifier type.
6) Transducer energy conversion efficiency is high (up to foreign peer standards) 7) 24 hours continuous operation control power supply and transducer without cooling (up to international standards of similar products) 8) The transducer and screen mesh are connected by screw which is convenient for disassembly assembly and cleaning.
Ultrasonic vibrating screen is to convert 220V 50Hz or 110V 60Hz electric energy into 36KHz high frequency electric energy input ultrasonic transducer and turn it into 36KHz mechanical vibration The generated power ultrasonic waves vibrate the screen The material on the screen is superimposed with ultrasonic vibration while performing low.
Our ultrasonic anti blinding system comprises an ultrasonic vibration generator and an ultrasonic transducer In the ultrasonic anti blinding the whole mesh is vibrated at very high frequency that helps to dislodge the embedded particles gently without causing damage to the mesh or the product.
Ultrasonic Vibrating Screen Introduction The ultrasonic vibrating screen is to transform the electric energy of 220V 50Hz or 110V 60Hz into high frequency electric energy of 18khz input the ultrasonic transducer and turn it into the mechanical vibration of 18khz so as to achieve purpose of high efficiency screening and mesh cleaning Based on the traditional vibrating screen the system.
Ultrasonic Vibrating Screen Generator With Transducer Ask Price Ultrasonic vibrating screen generator power is the core technology of ultrasonic vibration sieve sieve mesh to solve congestion problems played a crucial role in making shaker sieve particles can be sophisticated higher screening efficiency the scope broader.
Precautions for the use of ultrasonic vibrating screen transducer Centrifugal sifter machines and ultrasonic screening machines are usually used in the screening of fine powders and materials that are difficult to screen Centrifugal sifter is the operating principle of using air as the carrier and kinetic energy to do work It has the characteristics of low noise low power consumption and.
Generally Its screen cloth is from 100 mesh to 600 mesh The ultrasonic system can guard the screen cloth against the adhesion static and wedging The passing rate of the material is generally 50 400 higher than that vibrating screen without ultrasonic transducers.
ML Ultrasonic Vibrating Screen is adopts advanced techniques high sophisticated screening equipment It consists of Ultrasonic generator transducer resonant ring It’s an important breakthrough in screening efficiency This sieving machine adopts advanced intelligent vibrating ultrasonic controller and has solved many problems caused by single frequency truly realizing the reasonable.
This ultrasonic device is composed of an ultrasonic vibrating screen power supply and an ultrasonic transducer The function of the ultrasonic vibrating screen power supply is to convert low frequency current into high frequency current thereby using high frequency vibration to screen materials For the ultrasonic vibrating screen the ultrasonic device is the most important component It must be.
This ultrasonic device is composed of an ultrasonic vibrating screen power supply and an ultrasonic transducer The function of the ultrasonic vibrating screen power supply is to convert low frequency current into high frequency current thereby using high frequency vibration to screen materials.
The Ultrasonic Vibrating Screen System is consisit of the ultrasonic generator transducer resonant ring The ultrasonic generator creates high frequency oscillation and transducer will convert it to the high frequency sine shaped longitudinal oscillatory wave then the oscillatory will be transmissed to the resonant ring and creates the sympathetic vibration The resonant ring will transmissed the vibration to the screen.
Ultrasonic vibration screen factory manufacturer supplier China ultrasonic vibration screen factory manufacturer factory list find qualified Chinese ultrasonic vibration screen factory manufacturers suppliers factories exporters wholesalers quickly on Made in China com.
This device can make the screen surface superpose ultrahigh frequency vibratory energy so that ultrasonic vibrating sieve can keep clear of the mesh and achieve the ideal screen situation Ultrasonic vibrating screen is usually used in screening superfine powder which the ordinary vibrating screen can not solved.
Jun 11 2019 ultrasonic transducer for industry ultrasonic vibration sieve There is a part of the ultrasonic vibration screen called transducer Some details of its use need attention The main methods of using the transducer of the ultrasonic vibration screen are as follows.
Room1206 Block B World international center number 101 Shaoyaoju North Norththern city east road chaoyang district Beijing china [email protected] piezo com Ultrasonic Vibrating Sieve.
Ultrasonic transducer is the core component of ultrasonic vibrating screen Its characteristics determine the performance of the whole equipment It can realize the conversion of electric energy mechanical energy or sound energy from one form of energy to another This is the role of transducer With it the processing capacity of ultrasonic.
Apr 06 2020 Following article will introduce ultrasonic vibrating screen troubleshooting 1 Ultrasonic power supply does not work check the connection cable is connected or not ultrasonic power switch is open or not 2 Transducer failure check the transducer and ultrasonic power cable is tightened or not check the ultrasonic vibration screen sieve.
The function principle of ultrasonic vibrating screen is adding an ultrasonic energy transforming device on the screen surface of 3 D vibro separator and filter This device can make the screen surface superpose ultrahigh frequency vibratory energy so that ultrasonic vibrating sieve can keep clear of the mesh and achieve the ideal screen situation.
Ultrasonic vibrating screen can convert 220V 50Hz or 110V 60Hz electrical energy into 18KHz high frequency electrical energy and then put it into the ultrasonic transducer to convert it into 18KHz mechanical vibration achieving the purpose of efficient screening and cleaning.
The ultrasonic vibrating screen is composed of an ultrasonic generator a transducer and a resonance ring The ultrasonic generator generates high frequency oscillation the ultrasonic transducer convert it into a high frequency sinusoidal longitudinal oscillation wave and then the vibration wave is transmitted to resonance ring to produce resonance and then transmit the vibration evenly to.
Ultrasonic vibrating screen change 220V 50Hz or 110V 60Hz electrical energy into 36KHz high frequency electrical energy then input ultrasonic transducer it will become 36KHz mechanical vibration the power of the ultrasonic wave make the screen with high frequency vibration.
Ultrasonic vibrating screen is the rotary vibration screen installed ultrasonic system and it is a high precision ultra fine powder screening machine It is consist of upper cover screen frame with ultrasonic base vertical motor and ultrasonic generator etc Diameter can be ranged from 400mm to 2000mm and with single or multiple screening.
33KHz 100W Hesentec Ultrasonic Vibrating Screen Transducer 33KHz 100W Hesentec Ultrasonic vibration transducer 33K Ultrasonic Vibrator Transducer For Superfine Powder Screening 33KHz Ultrasonic Transducer 100W Ultrasonic Vibrating Screen Ultrasonic Vibrating Screen Ultrasonic Cleaning transdcuer 33KHz.
Then ultrasonic energy transducer will change it to mechanical vibration with 18KHZ In this way the ultrasonic system realizes the purpose of high efficiency sieve and cleaning mesh Detailed photos of LC series ultrasonic vibrating separator LC Ultrasonic vibrating screen Features Low consumption with.
Ultrasonic vibration power generator for Rotary Vibrating Screen $680 00 €680 00 419 56 AU$642 87 CA$644 10 S$838 78 Sale $540 00 €540 00 333 18 AU$510 52 CA$511 49 S$666 09 BUY NOW.
Product Description of ultrasonic vibrating screen sifter Description of gyro vibrating screen separator SYC series ultrasonic vibratory screen is equipped with the smart ultrasonic control transducer which can convert 220V 50HZ single phase or 110V 60HZ single phase to the 30 36KHZ high frequency energy so as to achieve the high efficiency sieving and screen net self cleaning purpose On the.
The function principle of ultrasonic vibrating screen is adding an ultrasonic transducer device on the screen surface of 3 D vibro separator and filter This device can make the screen surface superpose ultra high frequency vibration energy so that it can keep clear of mesh to prevent clogging and achieve the ideal screen situation.
Ultrasonic vibrating screen is on the basis of ordinary round vibrating screen to add an ultrasonic energy transform device which make the ultrasonic wave convert high frequency mechanical wave by ultrasonic power and ultrasonic transducer and transferred to the surface of screen usually used in screening superfine powder which the ordinary vibrating screen can not solved and solve the hard.
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3 in 1 Digital No Contact Medical Infrared Thermometer for Adult, Kids and Baby
Regular price$120.00Sale price$70.00
Easy to use Non-contact Measurement: Avoiding direct contact with the skin makes the measuring process safer and healthier, and the distance range of 5-8cm can prevent crossed infections. 3 in 1 Digital LCD Display No Contact Infrared Thermometer for Adult, Kids, and Baby. Just Press the on/measure button and the temperature displays immediately.
Dual Readings (Fahrenheit or Celsius): You can choose to measure using Fahrenheit or Celsius. And also can use this thermometer to measure the temperature of the human body or various objects such as milk, water, room or environment.
Safer & More Hygienic: Non-Contact Digital LCD infrared thermometer, Crystal clear and sharper display. Safer and more convenient. Compared to mercury thermometer, there is no danger of breaking a glass or swallowing mercury.
Quick and Accurate Readings: Get accurate readings quickly within 1 second and the measurement result truly reflects human body temperature. Without any operation, it will automatically shut down after about 30 seconds, which plays a role of very low power consumption.
Very Easy to Use with more Convenient and sleeker Design: Clear display and operation buttons make the thermometer easy to use. The backlight display is convenient for night use and temperature measurement. With a comfortable handle and made of small size, you can take it everywhere. Mute and Unmute mode.
Reliable Thermometer: Three colors of green, orange and red temperature display, if you have a fever or high temperature, there will be an instant beeper of the infrared thermometer. Press “Mode” to switch from Human forehead measurement to Object measurement.
Durable and Economical: The Thermometer can measure thousands of times and is equipped with Auto-power off (30 sec) for power saving, infrared temperature detection has much less wear and a longer service life; this Infrared Forehead Thermometer can easily switch between ℃ and ℉ to meet your different needs
Includes: 1 x Pouch, 1 User Manual, 1 x Infrared digital thermometer
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The G10 Pro walkie-talkie is suitable for use on construction
sites and on the road, because it is effective and sturdy, with a package of essential functions that ensure rapid communications.
Weight185gScanYesTones50 CTCSS Tone + 116 Normal DCS codes + 116 inverted DCS codesChannels16 new PMR446 channels + 32 PMR446 channels (16+16 preprogrammed)ChassisAlluminiumFrequencyExtended frequency band: 446.00625 – 446.19375MHzPower supplyBattery Pack Li-Ion 1200mAhAuto Power SaveYesAccessory socket type2 Pin KenwoodDimension HxWxD118 x 60 x 35mmProgrammable via PCYesVocal announcementYes
For example, with the SCAN function, which can be unlocked via the (optional) programmer, the radio constantly checks the channels to find conversations in progress and set the radio to the used channel.
32 total channels – 16 more than the previous model - take advantage of the extended frequency band (446.00625 –
446.19375MHz), with 50 CTCSS and 116 DCS tones, normal and
inverted, signalled by the voice indication.
The lithium battery guarantees long use and is automatically managed by the Auto Power Save function for efficient
consumption and energy saving.
The clean design is completed with the belt clip, inside the package, which can be mounted immediately.
G10 Pro has a wide range of accessories: the multi-station multiple charger (6 radios), different types of microphones (earphones, with or without PTT, pneumatic, to name just the main ones) with Kenwood 2-pin socket.


WELCOME TO PLASTO TECH NEPAL
Nepal has been relying on neighboring countries in various sorts of electrical and electronic items. For this reason, significant amount of money goes abroad for importing such goods. Establishing factories inside the country to produce electrical goods can save enormous amount of money. As a tiny step in making the country gradually self-reliant in electrical goods, Plasto Tech Nepal (PTN) was established in 2014 at Bharatpur-2, Kshetrapur, Chitwan as a proprietary firm in the beginning and now it was converted to a private limited company recently. It is striving for producing high-quality electrical accessories and delivering timely and efficiently all over the country. It has been manufacturing electrical items such as two- and three-pin tops, E27 and B22 angle and batten holders, ceiling rose, single and multi-pendent holders, modular angle and batten holders, D.P. switches, and so on. Due to country’s high demand for LED bulbs and tube lights, Plasto Tech Nepal Trading Pvt. Ltd. was also registered as a partner company by the same board of directors of PTN Pvt. Ltd., which has been importing such items and selling them all over the country.
World is heading towards promoting clean energy to reduce pollution and save environment. Capturing solar power is one of the best alternative clean energy, which has enormous scope. Nepal government has also implemented a Renewable Energy Subsidy Policy to promote solar lights recently. Our immediate future plan is to produce high-quality and efficient solar panels and sensor-activated light bulbs that is powered by free solar energy.


Redmi Note 10s – Affordable Smartphones With High Screen Rotation
If you are thinking of buying a new smartphone, the Redmi Note 10s is an ideal device for you as it is extremely impressive. It has been equipped with features that will astound you like its virtual keyboard, incredible processing power and a high-end camera. You can also opt for downloading some famous applications like Google Maps or taking advantage of the Windows Live Messenger. The device has been designed to run smoothly on all versions of the Windows operating system.
The Redmi Note 10s is a thinner variant of the stylish Redmi Note 10. It has been designed in such a way that it gives you the feeling of having a bigger and taller version of your favorite handset. The Redmi Note 10s comes with a 6. 43-inch HD display which offers you excellent viewing power. The Redmi Note 10s comes with a Corning Gorilla glass screen protector which extends life of the mobile phone. The redmi note 10s has a dual-mode dual SIM card which supports data while you use it as a regular handset.
As we know that Redmi Note 10S come with great gaming features like optimized games and high definition video recording. We have also tested these gadgets on various gaming platforms to find out whether they deliver great results on these devices. We have concluded that there are few games that work well with this handset. The games that run very smoothly on the device are FIFA and Need for Speed.
For people who are looking for high-end phones which offer high-end features, then the redmi note 10s is the perfect smartphone. The two cameras on the front are of good quality. Both cameras have shutter speeds and sound systems that are of high quality.
This smartphone has the facility of memory management which offers rapid file sharing for both documents and videos. The camera features a 4.2 megapixel camera which can record high-definition videos at 30 frames per second. The other camera on the upper side of the smartphone has a mode dial which allows you to switch between video recording and still recording. Apart from these, the battery of this smartphone has commendably good capacity to record heavy video recordings.
When it comes to browsing the web and taking pictures, this smartphone easily serves all the requirements of users. The screen offers excellent viewing and is bright and clear. The redmi note 10s also features a media rich software which helps you enjoy the best video and photo experience. These handsets have a complete native English language dictionary which provides instant help when required. The internet browser also provides superb speed which enables you to navigate through various websites.


BIS is a safe, rapid, noninvasive technique for assessing multiple fluid compartments and body composition simultaneously without laborious dilution techniques or underwater weighing.
The new standard in single frequency body composition analysis is the DF50. Until now single frequency bioimpedance has been limited by the “one algorithm fits all” approach. Single frequency bioimpedance has now come of age with the DF50’s three population-specific, peer reviewed algorithms providing greater accuracy over broader population groups.
- Accurate, single frequency (50kHz) BIA device
- Only instrument to offer peer reviewed General, Obese and Child algorithms
- Displays resistance, reactance, impedance and phase
- Calculates fat-free mass, fat mass, total body water, intracellular water, extracellular water and their percentages
- Includes test cell to check calibration
- Hand-held, battery operated and fully portable
Bioimpedance analysis (BIA) has become a widely accepted method for the determination of body composition due to its simplicity, speed and noninvasive nature.
To find out more ring our Healthcare Consultants on 02 65836900 or email firstname.lastname@example.org


Nvidia Company Announces New $1,200 Titan X GPU
Nvidia, a renowned Hardware Company, has now introduced a new GP102-based Titan X graphics card that is up to 60 percent faster than the previous version. The GPU was discovered at a special artificial intelligence presentation at Stanford University, with Nvidia CEO Jen-Hsun Huang making the announcement. The chief specifications of the Titan X are given below:
Specifications are as follows:
- 12-billion transistors
- 11 TFLOPs FP32 (32-bit floating point)
- 44 TOPS INT8
- 3,584 CUDA cores at 1.53GHz (versus 3,072 CUDA cores at 1.08GHz in previous TITAN X)
- High performance engineering for maximum overclocking
- 12GB of GDDR5X memory (480GB/s)
Furthermore, the upcoming Titan X is based on Company’s new Pascal architecture, and houses 3,584 CUDA cores, which is the highest amount ever. Let’s take a look on its cost and availability.
Prices and Availability
Do you want to buy this one? The card will be available from the Nvidia official website for North America, Europe, and "select system builders" from August 2. It will be "coming soon" to Asia. If you're thinking of picking one up, it'll set you back $1,200. Note that Nvidia has also called it "the biggest GPU ever built" so it might be worth checking if it'll fit your build before making a purchase.
Games Cottage will update you as something revealed about this. For more information for video games, cheat codes and walk-through guides, keep visiting. Furthermore, you are also encouraged to submit your views and suggestions in the comment section below:
Nvidia Titan X


Most sound card problems are a result of improper, defective, or misconnected cables, incorrect drivers, or resource conflicts. Sound card problems that occur with a previously functioning sound card when you have made no changes to the system are usually caused by cable problems or operator error (such as accidentally turning the volume control down). Sound card problems that occur when you install a new sound card (or when you add or reconfigure other system components) are usually caused by resource conflicts or driver problems. Resource conflicts, although relatively rare under Windows 9X/2000/XP in a PCI/Plug-N-Play environment, are quite common on machines running Windows NT and/or ISA because sound cards are resource hogs.
To troubleshoot sound problems, always begin with the following steps:
Verify that all cables are connected, that the speakers have power and are switched on, that the volume control is set to an audible level, and so on. In particular, if the sound card has a volume wheel on the back, make sure it is set to an audible level. It's often unclear which direction increases volume, so we generally set the wheel to a middle position while troubleshooting.
Shut down and restart the system. Surprisingly often, this solves the problem.
Determine the scope of the problem. If the problem occurs with only one program, visit the web sites for Microsoft, the software company, and the sound card maker to determine if there is a known problem with that program and sound card combination. If the problem occurs globally, continue with the following steps.
Verify that the sound card is selected as the default playback device. If you have more than one sound card installed, verify that the default playback device is the sound card to which the speakers are connected.
If your sound card includes a testing utility, run it to verify that all components of the sound card are operating properly.
If you have another set of speakers and/or a spare audio cable, substitute them temporarily to eliminate the speakers as a possible cause. If you have a set of headphones, connect them directly to Line-out on the sound card to isolate the problem to the system itself.
If the problem is occurring on a new system, or one in which you have just added or replaced a sound card, take the following steps:
Verify that the speakers are connected to the Line-out or Speaker jack, as appropriate, rather than to the Line-in or Microphone jack. Connecting speakers to the wrong jack is one of the most common causes of sound problems. We do it ourselves from time to time.
Verify that the CMOS Setup settings are correct for OS type. If you are running Windows 95/98/2000, OS type should be set to PnP Compatible (or similar words); if you are running NT4, it should be set to Non-PnP OS.
Use the procedures described in Chapter 1 to verify that no resource conflicts exist. If conflicts exist, remedy them and restart the system.
Check the troubleshooting sections of the Microsoft web site and the web sites for your motherboard and sound card manufacturer. Some sound cards, for example, have problems with motherboards with certain Via chipsets, while other sound cards have problems with AMD K6-family CPUs when used with certain AGP video cards.
Remove the drivers, restart the system, and reinstall the drivers from scratch.
Remove the drivers, shut down the system, and relocate the sound card to a different PCI slot. When the system restarts, reinstall the drivers from scratch.
If none of that works, suspect either a defective sound card or a fundamental incompatibility between your sound card and the rest of your system. Remove the drivers, shut down the system, remove the sound card, install a different sound card, and reinstall the drivers for it. If the replacement sound card is the same model and exhibits the same symptoms, try installing a different model of sound card.
If the problem occurs on a previously working system, take the following steps:
If you have recently added or changed any hardware, use the procedures described in Chapter 1 to verify that no resource conflicts exist.
If you have recently installed or uninstalled any software, it's possible that Setup installed DLLs that are incompatible with your sound card, or removed DLLs that your sound card or applications require. Remove the sound card drivers and reinstall them from scratch.
If sound still does not function properly, suspect a sound card failure.
Here are some specific common sound problems and their solutions:
This is probably the most common sound problem, and can have many causes. Following the troubleshooting steps listed previously should resolve the problem.
This problem can also have many causes. Perhaps the most common is the sound card itself. Older and inexpensive sound cards often have poor audio quality, particularly FM synthesis models. Other common causes include a defective or low-quality audio cable, speakers placed too close to the monitor or other source of electrical noise, and the placement of the sound card within the system. If you have a choice, locate a sound card as far as possible from other expansion cards. Another possible cause is that some video card drivers are optimized for benchmark tests by having them keep control of the bus. The result can be intermittent drop outs and scratchiness in the sound.
Computer sound is digital, and is delivered directly to the sound card via the bus. Audio CDs produce analog sound, and require a separate internal cable joining the audio out connector on the back of the CD-ROM drive to the CD Audio connector on the sound card. If you do not have the necessary cable, you can temporarily fix the problem by connecting a standard stereo audio cable from the headphone jack on the front of the CD-ROM drive to the Line-in jack on the sound card. Note that recent motherboards and CD-ROM drives can deliver CD audio as a digital signal directly to the sound card, obviating the need for a separate CD-Audio cable.
If you have another set of speakers or headphones, connect them directly to the sound card Line-out port to isolate the problem to either the sound card or the speakers. Roughly in order of decreasing probability, the most likely causes and solutions are:
The Windows audio balance control is set fully in one direction. Double-click the speaker icon in the System Tray and verify balance settings in the Volume Control dialog (or the replacement applet installed with your sound card drivers).
The balance control on your speakers, if present, may be set fully in one direction. This happens commonly when someone blindly attempts to change volume or tone and turns the wrong knob. Center the speaker balance control.
The audio cable is defective. Many audio cables, particularly those supplied with inexpensive speakers, are constructed poorly. Replace it with a high-quality, shielded audio cable, available for a few dollars from computer stores, audio specialty stores, and mass marketers such as Circuit City.
The audio cable is not fully seated in either the sound card jack or the speaker jack. Verify that the cable is fully seated at both ends.
You are using a mono rather than stereo audio cable to connect Line-out on the sound card to the speakers. Replace the cable.
The sound card driver is not installed, is installed improperly, or is the wrong driver. Some sound cards may function partially under these conditions, and the most common symptom is single-channel audio. Uninstall any driver currently installed, and then reinstall the proper driver.
Although it is rare, we once encountered a set of amplified speakers with one channel dead and the other working. Replace the speakers.
This is by design in some sound cards. Installing the card and driver intentionally disables the PC speaker and routes sounds that would ordinarily go to the PC speaker to the sound card instead.
On Windows systems with properly configured and functioning sound cards, sound may disappear entirely for no apparent reason. This has happened to us on many different systems, using different motherboards and sound cards. The sound card still shows as installed, and everything appears perfectly normal, but the system simply stops sending audio to the speakers. This problem may or may not be accompanied by the speaker icon disappearing from the system tray. We have no idea what causes this, and we've never been able to get a satisfactory explanation from Microsoft. Restarting the system normally solves the problem, until next time. On systems in which "next time" is all too frequent, we have occasionally had some success by removing and then reinstalling the sound drivers.
This problem normally results from a severe resource conflict or an improperly installed card. Verify first that the card is seated fully. If it is, boot the system in Safe Mode (Windows 9X: press F8 during boot) or using the Last Known Good Configuration (Windows NT: press the spacebar when prompted). With the system booted, determine which devices and resources are conflicting, resolve the conflicts, and restart the system.


XGSLab (Over and Under Ground System Laboratory) is one of the most powerful software packages for grounding system analysis, electromagnetic fields, interference and lightning analysis and the only software on the market that takes into account both EN and IEEE Standards.
XGSLab includes the modules:
GSA (GROUNDING SYSTEM ANALYSIS) for regular application (applicable in most practical cases).
GSA_FD (GROUNDING SYSTEM ANALYSIS in the FREQUENCY DOMAIN) for electromagnetic fields and interference evaluations for overhead and underground systems and for fault current distribution calculations.
XGSA_FD (OVER AND UNDER GROUND SYSTEM ANALYSIS in the FREQUENCY DOMAIN) for electromagnetic fields and interference evaluations for overhead and underground systems and for lightning effects and fault current distribution calculations.
XGSA_TD (OVER AND UNDERGROUND SYSTEM ANALYSIS in the TIME DOMAIN) for general applications with overhead and underground systems.
All modules are integrated in an “all in one” package and based on a hybrid calculation method (or “PEEC” method) which considers transmission line, circuit and electromagnetic theory combined into a single calculation model.
Hybrid methods join the strong points of the other methods and are well suited for engineering purposes because they allow the analysis of complex scenarios including external parameters such as voltages, currents and impedances. For these reasons, XGSLab can be considered a real laboratory.
The following table summarizes the main applications of the available models.
|Grounding (small systems)||Yes||Yes||Yes|
|Grounding (large systems)||No||Yes||Yes|
|Cathodic Protection Systems||No||Yes||Yes|
|Fault Current Distribution||No||No||Yes|
|Lightning effects for a single frequency||No||No||Yes|
XGSA_TD can be applied in order to analyse in the time domain current and potential distribution on underground and/or overhead conductors network energized by means current or voltage transient and can calculate the consequent distributions of earth surface potentials and electric and magnetic fields.
- Is a widely utilized and recognized module for earth grid calculations and design including soil analysis.
- Can analyse the low frequency performance of grounding systems composed by many distinct electrodes of any shape into a uniform or double layered soil model.
- Can import earth grid data from AutoCAD® files, delivering professional numerical and graphical output useful for investigation of GPR and leakage current, surface potential, touch and step voltage distributions.
Tags: multilayer, ieee 80, en 50522, lightning protection design, electromagnetic simulation, cathodic protection design, earthing system design, earthing software, grounding software, grounding system design


During the Nintendo Switch Presentation this evening we received a large amount of information, not the least of which was official information on some of the Specs of Nintendo’s upcoming system. So let’s dive in and discuss that shall we?
Let’s just go by a quick list shall we?
1.) The battery will last from 2-6 hours depending on the game (Example: Legend of Zelda Breath of the Wild will last about 3 hours.)
2.) You can play multiplayer in portable mode!
3.) You can link up to 8 systems together at a time!
4.) The system apparently features a tabletop mode so you can play in portable mode without having to hold the system
5.) The system is WI-Fi Compatible
6.) The screen is in fact, a touch screen.
7.) You will be able to take screenshots with the system via a camera button and edit, and add texts, and then share them online with your friends.
8.) Each joycon controller is in fact, a fully functioning controller allowing you to play with friends WHEREVER YOU ARE at all times. It also means the system comes with 2 fully functioning controllers so you may also get some couch co op action started as soon as possible.
9.) The joy con controllers will have various color variations!
10.) The Joy Con controllers feature some new, updated motion controls as well as rumble features. The controllers also feature a camera that can also read what your hands are doing as well. (Ex: Rock, Paper, Scissors formations.)
11.) Amiibo compatability will be accessible in joycon and pro controllers for the switch as shown in the above photos.
12.) The system does use only game cards for physical copies of games.
13.) Video output is 1080p resolution in TV mode and 720p when in handheld mode.
14.) When away from home, the system can be charged via an AC adapter that plugs into one of the USB Type C connectors.
15.) The system comes with 32 GB of Internal Storage. This can be expanded upon via MicroSDXC and MicroSDHD Memory Cards.
16.) The USB ports can be used with a USB Lan Adaptor to connect to an Internet source.
17.) The system supports 5.1 channel surround sound.
18.) The systems power is a custom Tegra Process of unknown specs currently.
Credit due to Nintendo Press Room for the information.


Facial recognition technologies are among the most trusted and efficient access control tools available to smart cities.
Computer vision is when AI has eyes and automates human sight. It has countless applications in many fields, including construction, security, agriculture, and many more.
Facial recognition technology is making many areas of life more convenient. People can now verify their identity without so much as a password or fingerprint. These technologies allow masses to access buildings without a key or breeze through airport security. But like any other privacy technology, fraudsters are targeting facial recognition via spoofing.
Modern facial recognition applications go far beyond accessing an iPhone or smart home. Today, facial recognition is proliferating into areas like air travel, retail, hotels and banking. That's because facial recognition can make customers' lives easier and businesses more efficient.
We've come a long way from ringing the doorbell or even needing keys to enter our homes, offices and buildings. Technology has given us smartphone apps, finger scanners and key cards. And now, facial recognition is making access even more convenient and secure.


Ride with confidence with the Bryton GARDIA R300L rearview radar. This rearview dual rearview radar and tail light provides double protection to guard you on your rides. When vehicles are approaching from behind, in addition to notifications on compatible bike computers and the GARDIA app, the Bryton GARDIA R300L will automatically change light modes to warn oncoming vehicles as well.
Ride with confidence with the Bryton GARDIA R300L. The GARDIA R300L radar sensor detects vehicles approaching from behind up to 190 meters away. By working seamlessly with compatible bike computers, the GARDIA R300L provides both visual and audio alerts to make you aware of approaching vehicles.
The Bryton GARDIA R300L rearview radar helps you avoiding unwanted surprises when you ride. When vehicles are approaching from behind, the Bryton GARDIA R300L will automatically assign a threat level based on the relative speed and change to a suitable warning light to alert the vehicles coming from behind.
When connected to compatible Bryton bike computers, the GARDIA R300L will utilize the computer’s built-in light sensor to adjust its light mode based on current light conditions. If sufficient light is detected, the tail light will be switched to day flash to conserve battery or when riding in darker conditions, the tail light will automatically switch to night flash.
Utilizing a built-in G-sensor, the Bryton GARDIA radar tail light can detect when you are braking and notify vehicles behind you with a brake light, lowering the possibility of collisions when slowing down or emergency braking.
Utilizing built-in ANT+ integration, the GARDIA R300L rearview radar and tail light is able to connect with compatible headlights and bike computers to form a network, enabling both headlights and tail lights to be controlled right from bike computers - including switch on/off and adjusting light mode functions.
The Bryton GARDIA R300L rearview radar and tail light is designed to draw attention to cyclists so they don’t blend into the background for oncoming vehicles. During the day, the running light features an interruptive flash pattern, increasing daylight visibility up to 1.6km.
The Bryton GARDIA R300L is equipped with multiple light modes to support you any time you ride so you are always visible in any riding conditions, including high solid, low solid, day flash, night flash, light off and a group ride mode. Additionally, with a compatible bike computer, you can adjust light modes right from your screen.
Tired of converting how many hours are left on your lights based on battery percentage? With a compatible Bryton bike computer or with the GARDIA app, the remaining battery time will be clearly displayed right on your screen after pairing with GARDIA R300L. Displaying the exact remaining battery hours of the GARIDIA R300L, makes it easier to manage your trip and settings before embarking on a ride.
Supplied with 17 hours of battery life in day flash mode and up to 12 hours in solid mode on a single charge, the powerful GARDIA R300L rearview radar and tail light can support you no matter how far your adventure takes you. To further extend the battery life, when the battery is low, the light will be automatically dimmed to conserve battery life. Additionally, USB Type-C charging makes recharging more convenient than ever!
With an innovative all-in-one mounting system, the Bryton GARDIA R300L saves you the trouble of complicated light installation. Simply fasten the GARDIA R300L rearview radar in your preferred position and you are ready to go! The included mount can fit 27.2mm, 30.9mm, 31.6mm D cross-section, and aero cross-section seat posts.


How is it Used? Understanding GPS Use and its Relation to Spatial Ability
Reliable GPS technology is a relatively new advancement to the daily consumer - however, the research studying the impact using GPS has on spatial cognition is relatively limited. The present study investigates the specific ways GPS can be used in various navigational scenarios and their relations to spatial ability, and if people will further modulate their general usage of GPS across scenario familiarity. The study finds general differences in the relations between how people specifically use GPS (e.g., for time and traffic estimates vs. turn-by-turn directions) and spatial ability, and that all people (regardless of perceived sense of direction) will use GPS less as navigation scenario familiarity increases.


Tactical Flashlight With Brilliant LED Zoom | Rechargeable Handheld Flashlight
Introducing the Powerful XHP90, XHP70.2, AND XHP50 LED Zoom Flashlights
Bright light when you need it with our Tactical Flashlight With Brilliant LED Zoom feature reaching up to 500 meters crystal clear.
- Rechargeable Power Display
- Powers on three (3) AAA Rechargeable Batteries (Not Included)
- High-quality durable aluminum body
Enjoy Handheld Power when you need it!
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Pixel TW-283/S2 LCD Wireless Shutter Release Timer Remote Control compatible with Sony Alpha A58 A7 A7R A7RII A3000 A6000 HX300 RX100II
ท่านกำลังดูข้อมูลของ Pixel TW-283/S2 LCD Wireless Shutter Release Timer Remote Control compatible with Sony Alpha A58 A7 A7R A7RII A3000 A6000 HX300 RX100II หมวดหมู่ รีวิว4.6ดาวใน ขายดีที่สุดใน รีโมทกล้อง
รายละเอียดสินค้า Pixel TW-283/S2 LCD Wireless Shutter Release Timer Remote Control compatible with Sony Alpha A58 A7 A7R A7RII A3000 A6000 HX300 RX100II
Why PIXEL TW-283:
4 Types Shutter Functions: 1. Single shooting
2. 2 Sec continuous shooting
3. BULB shooting
4. Delay shooting
6 Kinds of Timer Functions: 1. Timer schedule delay
2. Timer schedule exposure time
3. Timer shooting interval time
4. Timer shooting number of shots
5. Repeat time schedule interval time
6. Repeat timer schedule times
Anti-vibration: With wired or wireless remote control, it can avoid damaging image integrity and quality caused by
camera vibration when you press camera shutter button.
Simple: With large screen display, it’s clear at a glance. And very simple and easy to handle. So you can shoot on your own way.
FSK 2.4GHz Wireless Control System: It features no directionality, 80M+ remote distance and ultra-powerful anti-interference
ability. With 30 channels for option it can avoid interference caused by other similar devices. Using international 2.4G transmission
technology, it’s stable and quick response to shutter.
Aesthetic Style, Good Hand-feel: The remote control integrates aesthetic design to provide you the most confortable hand-feel
through hand-holding ratio measurement. The size is suitable for most of photographer’s hand, so it’s much handier. With
high-quality leather-like anit-drop design, it offers you better tactile appeal.
Wired/Wireless 4-in-1 Function: PIXEL wireless timer remote control integrates wireless/wired timer, wireless/wired shutter
functions, providing you variety of choices. When the Receiver is powered-off, you can use wired mode to capture the
Frequency: FSK 2.4 GHz
Transmitter: 1000H (use 2*AAA Batteries)
Receiver: 400H (use 2*AAA Batteries)
Transmitter: 146mm x 40mm x 19mm
Receiver: 73mm x 38mm x 31mm
2.When capturing the beautiful moments of sunrise and sunset and flowers bloom and fade , you don’t need to wait for the whole time . You can set delay timer,exposure time, interval time, number of shoots, repeat shooting interval time and repeat times.
3.Available to control different brand’s cameras and models by changing different camera connecting cable.The transmitter and receiver adopts LCD screen which is more easy and simple to handle.
4.TW-283 supports simple single shooting, 1S continuous shooting, [ BULB ] shooting, delay shooting and timer schedule shooting.Delay Shooting Setting can set delay time and shooting number, the delay time alters from 1s to 59s, shooting number alters from 1 to 99.Timer Schedule shooting time can be set from 0 sec to 99hrs59mins59sec. Shooting number can be set from 1 to 99.


- 7.7" 2-way marine tower speakers (pair)
- built-in RGB LED lights
- injection-molded, mica-filled polypropylene woofers with synthetic rubber surrounds
- 3/4" silk dome tweeters
- UV- and corrosion-resistant polymer baskets and grilles
- JL Audio mounting clamps (sold separately) are required
- 2-way crossovers attached to the woofer baskets
- power handling: 70 watts RMS (225 watts peak)
- frequency response: 55-25,000 Hz
- sensitivity: 90.5 dB
- enclosure depth: 12-1/2"
- enclosure diameter: 7-3/4"
JL Audio M3-770ETXV3-SB-S-GM-I


How AI can make our lives easier
Artificial intelligence (AI) has become an integral part of our lives, revolutionising various industries and offering numerous benefits.
One of the main benefits of AI is its ability to automate tasks, saving time and increasing efficiency. AI-powered systems can perform repetitive and mundane jobs with precision and accuracy, allowing people to focus on more complex and creative endeavours. This automation not only enhances productivity but also reduces the risk of errors.
AI also has the potential to improve decision-making processes. By analysing vast amounts of data and identifying patterns, AI algorithms can provide valuable insights and assist in making informed decisions. This is particularly useful in fields such as finance, healthcare, and marketing, where data-driven decisions can have a significant impact.
Furthermore, AI has the capability to enhance customer experiences. Chatbots and virtual assistants powered by AI can provide instant and personalised responses to customer queries, improving customer satisfaction and engagement. AI algorithms can also evaluate customer behaviour and preferences to offer tailored recommendations, leading to increased sales and customer loyalty.
In the healthcare industry, AI has the potential to revolutionise patient care. AI algorithms can analyse medical data, such as patient records and diagnostic images, to help doctors in accurate diagnosis and treatment planning. This can lead to faster and more effective healthcare interventions, ultimately saving lives.
AI also plays a crucial role in enhancing cybersecurity. With the increasing number of cyber threats, AI-powered systems can detect and respond to potential attacks in real-time. By continuously analysing network traffic and identifying suspicious activities, AI can help prevent data breaches and protect sensitive information.
Additionally, AI has the potential to drive innovation and creativity. Through machine learning algorithms, AI systems can generate new ideas, designs, and solutions to complex problems. This can be particularly beneficial in fields such as product development, where AI can assist in creating innovative and marketable products.
However, it is important to acknowledge that AI also presents challenges and ethical considerations. Issues such as job displacement, privacy concerns, and biases in algorithms need to be addressed to ensure responsible and fair use of AI technology.
Artificial intelligence offers numerous benefits across various industries. From automating tasks and improving decision-making to enhancing customer experiences and revolutionising healthcare, AI has the potential to transform our lives for the better.
However, a note of caution. It is crucial to approach AI development and implementation with a degree of responsibility to mitigate potential risks and ensure society is not affected negatively. Whatever people’s views, the one thing for certain is that AI is here to stay.
Majellan Media has introduced an AI inspired Faithful Toolkit AI that includes – FaithGuide, BibleSearch and Saintscape – to assist people with their faith-based questions. Details at: Faithful toolkit – Majellan Media
Footnote: This story was written by AI.
We encourage you to share and use this material on your own website.
However, when using materials from Majellan Media’s website, please include the following in your citation: Sourced from www.majellan.media


Looking for some ways to Overclock your device? Well here is a short post, which can guide you to use SetCPU and overclock your android smartphone.
Why to OVerclock using SetCPU:
The speed of your Android device is solely dependent on the processor of the device. Now every processor is set at a certain speed at which it processes the data. The more the clock speed, the more faster the processor operates, and hence faster the device. Overclocking means that you increase the clock speed of the processor over the limit it is set to operate. Now when you do so, it is certain that your device will function faster. Continue Reading


Robot Architecture: Parts, Sub-Parts and Remotes
When robots communicate with each other, they can share resources and operate collaboratively. This document explains how to establish secure connections between robots.
Robots are organized into parts, where each part represents a computer (a single-board computer, desktop, laptop, or other computer) running
viam-server, the hardware components attached to it, and any services or other resources running on it.
Every robot has a main part which is automatically created when you create the robot.
Multi-part robots also have one or more sub-parts representing additional computers running
There are two ways to link robot parts:
Sub-part: If you have two computers within the same robot, use one as the main part and connect the other to it as a sub-part.
Remote: To connect two computers that are parts of different robots, add one robot part as a remote part of the other robot.
Connections between robots are established using the best network path available.
When you configure a remote or a sub-part, the main robot part can access all the components and services configured on the remote robot part as though they were entities of the main robot part. This is a one-way connection: the main robot part can access the resources of the remote robot part, but the remote robot cannot access the resources of the robot part remoting into it.
Configure a sub-part
You can make a multi-part robot by first configuring one part which is the “main” part, and then configuring one or more sub-parts. The main part will be able to access the resources of its sub-parts. Sub-parts will not have access to the resources of the main part.
Use the parts drop-down menu in the top banner of your robot’s page on the Viam app to add a new sub-part:
To delete a sub-part or make it the main part, use the buttons in the top right of the Config tab.
Configure a remote
To establish a connection between a part of one robot and a part of a second robot, configure a
remote on the first robot’s part.
Go to the Viam app robot page of the robot part to which you wish to establish the remote connection. This is the robot part whose resources will be accessible to the other robot part.
Click the Code Sample tab.
On the Language toggle, select Remotes.
Click Copy JSON.
Go to the Viam app robot page of the robot part from which you want to establish a remote connection. This is the robot part that will be able to access the resources of the other robot part.
Click the Config tab, click the Remotes subtab, and select JSON mode.
Click Create Remote.
Paste the remote config you copied in step 4 into the empty field.
Click Save Config in the bottom left of the screen.
Using remote parts and sub-parts with the Viam SDKs
Once your sub-part or remote part is configured, you can access all the components and services configured on the sub-part or remote robot part as though they were resources of your main robot part. The only difference is that the names of the components have the remote robot part name prepended to them. For example, instead of calling
servo = Servo.from_robot(robot=robot, name='my_servo')
you need to call
servo = Servo.from_robot(robot=robot, name='my-sub-part-name:my_servo')
servo = Servo.from_robot(robot=robot, name='my-other-robot-main:my_servo')
For an example that controls a motor that is a component of a sub-part, see the Mock Robot tutorial.
Have questions, or want to meet other people working on robots? Join our Community Discord.
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Technology’s rapid pace makes it impossible to predict what the end of the next decade will look like. Less than a year ago, no one thought generative AI innovations, ChatGPT or Midjourney, would be as disruptive this fast.
This shows that IT professionals can only thrive by staying ahead of the curve. They need to know what, when, where, and how things are happening in the tech world – reading this blog is a pleasant first step.
Our list of the top emerging technologies for 2023 is in no way exhaustive; we might have missed out on a few and intentionally ignored others, but all in all, we’ve covered the very best happenings influencing the future of the tech industry in 2023. Stay tuned!
1. Artificial Intelligence and Machine Learning
With ChatGPT and the likes, it’s evident that Artificial intelligence (AI) is already a household name and needs no introduction.
But what about AI’s relationship with machine learning? We’re guessing you know very little about how this symbiotic relationship will affect the future; well, let’s explain.
Here’s AI simplified:
- Machine vision: AI technology that allows computers to see and interpret images like the human eye. For example, automatic ID scanners.
- Conversational AI: advancements like ChatGPT showcasing how well computers understand speech and written text.
- Robotics: AI tech that helps robots understand simple commands. For example, Walmart’s automated assistance.
Now, you must be wondering how the above descriptions have anything to do with AI and machine learning; here’s the screamer;
Machine learning underpins most AI developments and teaches computers to learn from the vast amounts of data continually generated—a candid example of generative AI in action.
2. Voice Assistance
Not too long ago, talking was regarded as a thing you do with family, friends, colleagues, and sometimes, enemies. But now, voice-based commands are the new norm; you can literally talk to your phone, car, speakers, or any other voice-enabled device.
Voice assistant software allows for the creation of routines that can be kicked off by a simple voice command like, “Good morning” or “Good night. It can also conduct more sophisticated tasks like reading the news, setting light levels around the house, adjusting temperature, etc.
Indeed, the voice revolution has only just begun. Today, Alexa, Siri, and Cortana are the top emerging technologies in the space, but we can’t fully grasp what the future holds. Not to forget that innovation for voice assistance software is still in its infancy, ongoing, and is open to all, even to you.
3. Edge Computing and 5G
Here are another two highly advanced technologies complementing each other – based on necessity – to usher in a new generation of smart devices and apps.
5G is a next-generation wireless technology with high bandwidth, probably the fastest ever. On the other hand, edge computing is a network infrastructure that can handle large data volumes.
Every day, humans generate more than 3.5 quintillion bytes of data. Have the thought of where all these data go ever occurred to you? Like humans, data also need a house (database) or a shelter to take refuge.
5G and edge computing is a next-gen duo functioning together to cater to the large volumes of data generated, tackle the difficulty of transporting data, and ensure the inefficiencies of remote computing don’t get in the way.
4. Quantum Computing
Maybe you haven’t noticed, but hey, some problems are actually too complex for classical computers.
Medical personnel can’t use their everyday computer to simulate complex drug designs or tailor treatments to a patient’s DNA; you can’t even accurately predict the weather with a classical computer—you need quantum computing for such tasks.
Quantum computing harnesses the laws of quantum mechanics to solve complex problems. They can perform multiple calculations simultaneously and are very good at ‘optimization problems.’
Volkswagen’s collaboration with Google to use quantum computing to help buses and taxis find the fastest route is one common use case in business.
For the umpteenth time, blockchain is not bitcoin – bitcoin is just one of its many applications.
Blockchain is a technology promoting safe and accurate record-keeping across a network of computers. Multiple people can interact with the record depending on whether or not the network is open to the public.
The difference between blockchain and a typical day-to-day record-keeping banks engage in is that there is no third party; transactions run on smart contracts and do not involve human intervention.
Blockchain is making waves across all industries as a fast and secure way to do business, and developers are in high demand – it’s probably one of the few top emerging technologies on our list set to disrupt how people do business for decades to come.
6. Robotic Process Automation (RPA)
Clearly, the need to automate repetitive tasks isn’t as deliberate as most tech companies make it out to be, especially since it’s one of the biggest innovations causing mass layoffs.
However, there is no denying that the future is automated. We can’t thrive as a species if all we do is sit at a computer and complete defined tasks.
Robotic process automation involves building, deploying, and managing software robots that aid our day-to-day activities. RPA can be as simple as using automation software to reply to business emails sent on weekends or as complex as having one of Walmart’s robots sell you groceries.
Though, if you haven’t had one of Walmart’s robots sell you groceries, you’re not alone – RPA in retail is among the top emerging technologies in its infancy and is offering a truckload of recruitment opportunities to IT professionals.
7. Low Code and No Code
Who’d have thought that there would come a time when even the most complex task, the brainchild behind the third industrial revolution – coding – would give way to more simple, minimalistic endeavors?
Well, dependencies on traditional computer programming approaches are gradually becoming a thing of the past. You don’t need to learn complex codes to build a website or mobile app anymore.
Low code and No coding technology aids non-technically savvy workers with drag-and-drop features they can use to build intuitive interfaces from start to finish. One famous example is Spotify’s No-code partner on Voiceflow.
8. Enterprise Metaverse
Augmented reality (AR) (an overlay of the digital world on the physical space) and virtual reality (VR) (immersive computer-generated simulation of the physical world) have, for the past decade, disrupted how people in education, entertainment, and medicine do their work – no one blinked an eye.
But since the advent of the Metaverse experience, think of it as the internet brought to life with AR and VR, or at least rendered in 3D – all the big brands began to make big changes. Facebook changed its name to Meta; Disney appointed a senior executive to oversee its metaverse strategy; LEGO invested in Epic Games (makers of Fortnite).
With everyone putting their best foot forward to become a leader in the space, no need for much chit-chat about how the enterprise metaverse is among the top emerging technologies and probably the future of the tech industry.
9. Cloud-Native Platforms
The on-demand delivery of all kinds of application services (Eg. Amazon Web Services, Google Cloud, or Microsoft Azure) via the Internet made it easy for companies to use metered pricing and pay for only the resources they consumed.
However, cloud computing’s swiftness and ease of use brought about another problem; everyone focused on the servers where applications were created and deployed. No one talked about the services and how each fits specific use cases.
Cloud-native platforms provide the architecture needed to build scalable, flexible, and resilient applications you can update quickly to meet customer demands. It focuses on the services, not the servers.
You can explore cloud-native services like Kubernetes, Docker, APIs, and Kafka for more insight into how this tech is redefining the future of the tech industry.
10. Internet of Things (IoT)
Imagine everything working in sync with the internet as a huge brain – your phone, car, gym equipment, kitchen faucet, window blind, and everything you can think of connected to the internet and working in rhythm.
In 1926, over 90 years ago, Nikola Tesla predicted such a reality. Today, over 14.4 billion devices are connected to the internet, with some estimates suggesting that by 2030, over 500 billion devices will be interconnected.
The Internet of Things involves the interconnectivity of a growing network of Internet-enabled devices.
From smart fitness trackers to smart door locks and all other top emerging technologies, IoT is using sensors to collect the vast amounts of data they process, feeding it into an ever-expanding network to form a digital nervous system – leaving a hyper-connected world in its wake.
Examining the pace at which technology changes today, it might feel pointless to forecast the tech industry’s future beyond a few weeks or months. But as the old truism goes, strategic foresight will result in preparation, not prediction.
We hope you had a good read. We wouldn’t mind if you left a comment about some of the most disruptive technologies you feel our list proved too short to include.


Information searches, website monitoring and alerts have now become a part of business habits. Monitoring activities are generally highly oriented toward the internet. The thoroughness of the information published requires the use of specific Internet monitoring tools.
Each business must monitor, research, and process information and then distribute it to its employees regarding the company’s competition, market, technologies, and products.
Online intelligence monitoring lets you monitor various information sources on the web. The purpose of this monitoring is to be informed in real time on the latest news related to a topic, sector, technology, competitor, or your own company (here we refer to your “Online reputation”).
Online intelligence involves several steps: monitoring and information collection, processing and analyzing data, and the distribution and sharing of information. This process is very convenient for anticipating changes in an environment during Competitive Intelligence monitoring or to analyze the reputation of a company during Online reputation monitoring.


Revised 18 May 2016
This is a reposting of an earlier article under an open source project of mine. I’ve added it here as it is applicable to a more general audience than the yad2xx user.
It documents configuration issues between OS X (Yosemite) and a range of USB integration chips from FTDI. I’ve revised this article for El Capitan here.
There is a history between FTDI and Apple regarding device drivers for the OS X platform. Aspiring hackers be warned, it can be a bit of a minefield. This article is aimed at users of OS X Mavericks or later. Presently, I am using Yosemite, 10.10.5. You will find other material on the ‘net. At some point in time it will have been correct…
Connecting an FTDI based device to OS X can be a little tricky as both FTDI and Apple offer drivers. OS X version is also a factor, as are the USB devices vendor and product identifiers (VID/PID). The following device drivers are available:
- Apple Serial Driver
- FTDI Serial Driver (aka VCP Driver)
- FTDI D2XX Driver
The first is available by default on Mavericks or later. The other two must be installed by the user and may cause conflicts.
Every USB device is allocated a unique vendor id/product id combo. When a device is attached OS X uses the VID/PID to determine which device driver to use. USB device vendors such as FTDI pay a licence fee and are allocated a unique number. For FTDI this unique vendor id (VID) is 0x0403. All devices manufactured by FTDI will come with this value set.
Product identifiers (PIDs), are allocated by the individual manufacturer. Because the PID is an unsigned 16-bit number there are a possible 65536 values available. FTDI sell multiple kinds of USB devices, the assigned PID varies according to the device. Common values are :
|FT232BM/L/Q, FT245BM/L/Q||0x0403, 0x6001|
|FT232RL/Q, FT245RL/Q||0x0403, 0x6001|
On OS X you can view the VID/PID settings for every attached USB device in the System Report (Apple Menu -> About This Mac).
When a new USB device is attached OS X interrogates the device, a process known as USB device enumeration . The information obtained is used to locate the correct device driver for the device.
Apple Serial Driver
For OS X releases 10.9+ (Mavericks and above), Apple provide their own device driver. It is configured to match against all default FTDI VID/PID combinations (see table above). Devices matched by this driver operate as serial ports and are located in the filesystem under /dev/cu.usbserial-xxxxx. Devices configured this way can be operated using the POSIX communications API .
Devices using the Apple driver cannot be operated using the D2XX driver. If you try to connect to one of these devices via D2XX it will report already being open. You can disable the Apple Driver using the following command:
sudo kextunload –b com.apple.driver.AppleUSBFTDI
Be warned, this disables the Apple driver for all FTDI devices using default VID/PID.
For reference, the Apple driver is located in:
FTDI Serial Driver (VCP Driver)
FTDI supply their own serial driver for OS X. Its use is optional and you must manually install it. It installs into (v2.3+):
Like the Apple driver, its matches all default FTDI VID/PID devices. It also is configured to match many 3rd party devices based on an FTDI chip. The list of supported devices is too long to list here, see:
The FTDI serial driver will not cause conflicts with the Apple driver. In all instances where the device could match either driver the FTDI serial driver is used.
Because the FTDI serial driver is signed it cannot be modified. Editing the driver files, for example Info.plist, will prevent OS X from loading the driver (editing changes the package signature). This means that the FTDI serial driver can only be used with devices known to FTDI. It cannot be used with custom VID/PID devices.
Like the Apple driver, devices should be programmed using the POSIX communications API. You can disable the FTDI Serial driver using:
sudo kextunload –b com.FTDI.driver.FTDIUSBSerialDriver
FTDI D2XX Driver
The FTDI D2XX Driver is an optional installation. It allows the device to be used as a serial port. It also allows access to more advanced device modes such as bit bang, JTAG, I2C, SPI etc.
Devices may experience driver clashes. This is based on the device VID/PID combo and the installed drivers. The default FTDI VID/PID settings will match the Apple driver (always) and the FTDI Serial driver (if installed). Unlike the VCP driver, the Apple driver will win all clashes and the D2XX driver will fail (device open). If you want to use the D2XX driver for an FTDI device using the default VID/PID you must unload the Apple driver before the D2XX driver will work.
It is possible to reprogram an FTDI devices VID/PID . Changing to a VID/PID combo outside those configured for the Apple driver means the Apple driver will not match.
Changing to a value outside those configured for the FTDI Serial driver means that driver will not match. Devices that fail to match the Apple and FTDI Serial driver can only use the D2XX driver.


By Filemon Haininga
Fifa president Gianni Infantino is expected to introduce robot lineman in the upcoming November world cup. After the trials of the robots have been successfully tested in November last year in the club world cup match won by Liverpool there is no doubt on replacing the current linesman with the robots.
According to the UK online newspaper The Sun, there are signs that the technology does work, bringing far quicker offside calls than the current VAR line-led system, world chiefs are due to give a positive update regarding the use of the robots in due time.
The robots are reported to have 10 cameras that track 29 body parts of each player on the pitch. It means that England’s opener against Iran on November 21 will be only the second game in which the technology is deployed.
However, a final decision will be taken by Fifa after a full analysis of the data from the trials.


We propose an extension of the embedded boundary method known as “shifted boundary method” to elliptic diffusion equations in mixed form (e.g., Darcy flow, heat diffusion problems with rough coefficients, etc.). Our aim is to obtain an improved formulation that, for linear finite elements, is at least second-order accurate for both flux and primary variable, when either Dirichlet or Neumann boundary conditions are applied. Following previous work of Nishikawa and Mazaheri in the context of residual distribution methods, we consider the mixed form of the diffusion equation (i.e., with Darcy-type operators), and introduce an enrichment of the primary variable. This enrichment is obtained exploiting the relation between the primary variable and the flux variable, which is explicitly available at nodes in the mixed formulation. The proposed enrichment mimics a formally quadratic pressure approximation, although only nodal unknowns are stored, similar to a linear finite element approximation. We consider both continuous and discontinuous finite element approximations and present two approaches: a non-symmetric enrichment, which, as in the original references, only improves the consistency of the overall method; and a symmetric enrichment, which enables a full error analysis in the classical finite element context. Combined with the shifted boundary method, these two approaches are extended to high-order embedded computations, and enable the approximation of both primary and flux (gradient) variables with second-order accuracy, independently on the type of boundary conditions applied. We also show that the the primary variable is third-order accurate, when pure Dirichlet boundary conditions are embedded.
We propose a model order reduction technique integrating the Shifted Boundary Method (SBM) with a POD-Galerkin strategy. This approach allows to deal with complex parametrized domains in an efficient and straightforward way. The impact of the proposed approach is threefold. First, problems involving parametrizations of complex geometrical shapes and/or large domain deformations can be efficiently solved at full-order by means of the SBM. This unfitted boundary method permits to avoid remeshing and the tedious handling of cut cells by introducing an approximate surrogate boundary. Second, the computational effort is reduced by the development of a Reduced Order Model (ROM) technique based on a POD-Galerkin approach. Third, the SBM provides a smooth mapping from the true to the surrogate domain, and for this reason, the stability and performance of the reduced order basis are enhanced. This feature is the net result of the combination of the proposed ROM approach and the SBM. Similarly, the combination of the SBM with a projection-based ROM gives the great advantage of an easy and fast to implement algorithm considering geometrical parametrization with large deformations. The transformation of each geometry to a reference geometry (morphing) is in fact not required. These combined advantages will allow the solution of PDE problems more efficiently. We illustrate the performance of this approach on a number of two-dimensional Stokes flow problems.
The discontinuous Galerkin (DG) method has found widespread application in elliptic problems with rough coefficients, of which the Darcy flow equations are a prototypical example. One of the long-standing issues of DG approximations is the overall computational cost, and many different strategies have been proposed, such as the variational multiscale DG method, the hybridizable DG method, the multiscale DG method, the embedded DG method, and the Enriched Galerkin method. In this work, we propose a mixed dual-scale Galerkin method, in which the degrees-of-freedom of a less computationally expensive coarse-scale approximation are linked to the degrees-of-freedom of a base DG approximation. We show that the proposed approach has always similar or improved accuracy with respect to the base DG method, with a considerable reduction in computational cost. For the specific definition of the coarse-scale space, we consider Raviart–Thomas finite elements for the mass flux and piecewise-linear continuous finite elements for the pressure. We provide a complete analysis of stability and convergence of the proposed method, in addition to a study on its conservation and consistency properties. We also present a battery of numerical tests to verify the results of the analysis, and evaluate a number of possible variations, such as using piecewise-linear continuous finite elements for the coarse-scale mass fluxes.
The coupling of anisotropic unstructured mesh adaptation techniques with an immersed boundary method (IBM) called penalization is studied for time dependent flow simulations involving moving objects. To extend Residual Distribution (RD) method to the penalized Navier Stokes equations, a new formulation based on a Strang splitting is developed. To reduce the error on solid boundaries, unstructured mesh adaptation based on an elasticity model is used. Keeping a constant connectivity, the mesh evolves in time according to the solid position, and the new formulation is proposed in an ALE framework.
The interest on Immersed Boundary Methods (IBM) is increasing in Computational Fluid Dynamics as they simplify the mesh generation problem. In this work, we consider an approach based on the addition of a penalty term to the Navier–Stokes equations to account for the wall boundary conditions. To discretize the resulting equations we use a residual distribution approach previously developed by some of the authors. To adapt the method to the IBM considered, we developed a new formulation of residual distribution based on a Strang splitting method in time, coupling an implicit asymptotic integration procedure of the penalization ODE with a simplified explicit residual distribution for the Navier–Stokes equations. The first method, provides an operator which is exact up to orders eta^2, with eta the penalty parameter assuming values of the order of 10^−10. A modification of the solution gradient reconstruction necessary for the evaluation of the viscous fluxes, is also introduced in the paper. This guarantees that correct physical values of the viscous stresses are recovered in vicinity of the solid. We show formally and numerically that the approach proposed is second order accurate for smooth solutions. We evaluate its potential for IBM by coupling the resulting method with unstructured mesh adaptation on wall boundaries. Several steady and time dependent tests are used to show the promising features of the method proposed.
The interest on embedded boundary methods is increasing in Computational Fluid Dynamics because they simplify the mesh generation problem when dealing with the Navier-Stokes equations. To give a few examples, they simplify the simulation of multi-physics flows, the coupling of fluid-solid interactions in situation of large motions or deformations. Nevertheless an accurate treatment of the wall boundary conditions remains an issue of the method. In this work, a penalty term added to the Navier-Stokes equations accounts for the wall boundary conditions and accuracy is recovered using mesh adaptation, thanks to the potential of unstructured meshes.


For this last hackday, I decided to work on something more hardware hacking related. At this year's Maker Fair, I was really inspired by all the cool stuff people were building, so I picked up an arduino and started playing around with a couple of things.
I've always wanted to have some cool old-school analog VU type meters displaying web requests.
Here's my completed hackday project:
Here's a view of the components from the back:
It's battery operated and receives data wirelessly over RF from another arduino I have hooked up via serial to my laptop.
It's pretty simple, but I'm still totally psyched about how it came out.
The main components are some analog panel meters (kinda pricey, but awesome), and an RF receiver. The frame is a piece of scrap acrylic from TAP Plastics that I drilled and cut to size, and the stand is a piece of a wire clothes hanger bent to shape.
Connected to my computer is a another arduino (actually a volksduino) that receives updates over USB and sends the data out over RF:
You may be asking, why bother with wireless if you need a computer hooked up through serial anyway. Or you may ask why not just connect to a wireless network directly.
Well, I wanted the meters to be able to be moved around, or mounted on a wall... I wanted them wireless. But, it turns out that wireless and even ethernet solutions for connecting an arduino to the internet directly are comparatively pretty expensive. Even using bluetooth is expensive. My long term plan is to have a single arduino connected to the internet directly (via ethernet or wireless), and have it serve as a proxy over RF for the others... So this is a bit of work towards that.
I wrote a bit of Java code to connect to amazon's cloudwatch to pull the load balancer statistics for two of our services. I then discovered it's near impossible to connect to anything over USB in Java... It is ridiculous. Luckily, it's REALLY easy to do this with Processing, so I wrote a simple processing program that used my cloudwatch library and wrote it out to serial.
And that's really it. The arduino reads data over serial, and periodically sends it over RF. The arduino hooked up to the meters simply reads the values over RF and sets the meters to display a scaled version of the results. They're showing requests per second. We get a huge amount of requests per second with these services, so the numbers on the dial aren't actually correct (I need to make some custom faceplates). It also flashes an LED every time it gets a RF transmission.
Here's a quick video of it in action:
The one thing I'm not crazy about is that the maximum resolution you can get from cloudwatch is stats per minute, so the meters don't actually change as often as I would like.
Still, pretty cool. I'm looking forward to building some more displays like this in the future.