Now Free: iStethoscope Expert   
iStethoscope Expert
Kategorie: Medizin
Preis: 2,29 € -> kostenlos
Version: 2.5
in iTunes öffnen

Beschreibung:
With iStethoscope Expert, you can use your iPhone to listen to heart sounds, bowel sounds, lung sounds, and heart valve sounds. You can save and record heart sound wave tracings. iStethoscope Expert uses the built-in microphone on an iPhone/iPad or an external microphone on an iPod. The heart waveform can be recorded and e-mailed. You can use your iPhone, iPod or iPad to hear distant sounds. iStethoscope Expert includes an extensive collection of video recordings of heart, lung, and bowel sounds. Use the Murmur Interpreter to learn to diagnose valve murmurs. This app is useful for medical students, physicians, nurses, EMTs and anyone who wants to learn about heart sounds, lung sounds or abdominal sounds. iStethoscope Expert helps you learn auscultation techniques for USMLE and NCLEX.
          Timelock - Universe Unfold (2017)   

[center]
https://img117.imagetwist.com/th/16230/7fqvl3mqmjqr.jpg
[/center]
[center]
Artist: Timelock
Title: Universe Unfold
Year Of Release: 2017
Label: Dropzone Records
Genre: Psychedelic / Progressive
Quality: Mp3 / 320kbps
Total Time: 61:03 min
Total Size: 139 MB
[/center]
Tracklist
----------
01. Timelock & Coexist - Stereofreak
02. Timelock & High Jacked - Beyond
03. Impact & Timelock - Dananda
04. Timelock & Effective - Time Effect
05. Timelock & Waveform - Stonekey
06. Timelock & Dynamic - The Clan
07. Timelock & ON3 - Universe Unfold
08. Impact & Timelock - Visual Forms
09. Timelock & Originals - Unbound
--


          Chip Hall of Fame: Intersil ICL8038 Waveform Generator   
Intersil’s somewhat cranky chip brought complex sound generation to consumer electronics
          Just because I like Top Gear doesn’t mean that I’m a Misogynist, or does it?    

When you read my blogs you would probably get the impression that I am a misogynist “Woman Hater” but you would be wrong, I am exactly the opposite! I can find a quality I like about even the most appalling Harpies. Over the years this has been my biggest downfall, and just because I like one quality doesn’t mean to say they don’t drive me mad with numerous other things I don’t like.

I think I’m a good host, I don’t ask a lot from a house guest or girlfriend, just two rules, don’t touch the remote controls, and when I’m watching a program, only talk during commercials, if you have something urgent to say Text me, now is that too much to ask? Just to clarify “You’re a shit boyfriend, I never want to see you again, and I’m going home “ is not an urgent message, I could get the gist from the, Tuts, the door slamming and the tyre squeal, without missing any of the program .

In my defence it’s imperative that you watch a Motoring Program (Top Gear) live because If I had a quid for every time I’ve sat down to watch a film or TV program that I set my video to record, and just before the end “somebody” has changed the channel and Coronation Street, Eastenders or some other drivel comes on, I would be a millionaire. Even Sky Plus Falls foul of the 8 Oclock weekdays phenomena when two equally shit Womens programs are broadcast on different channels, so instead of Wayne Carini in an Episode of Chasing Classic Cars, you get a message saying this “Program failed to record due to a Programming Conflict” (Which roughly translated means, we did manage to record your Girlfriends Programs But Hey, Have a Great Night!) ”

When a Womans watching a program, it’s like turning a shark on its back, (I watch The Discovery Channel a lot too) they go into an almost catatonic state, except for the odd “Bastard” muttered at the guy in the program who's done something to upset one of the female characters, then they give a sideways glance in your direction which really means “You even think of doing that and I will be after you with the kitchen scissors!

When you’re watching a program it’s a different thing, women can multitask, for multitasking substitute “do several things that annoy you all at the same time” they can read a magazine, hum a tune, and flick the pages over so fast that each page sounds like a whip crack. Incidentally did you know that a whip cracks, because the end is travelling faster than the speed of sound and it creates a mini Sonic Boom, if you didn’t know that, the chances are its because you were watching the program "Little Known Facts" with your girlfriend.

They don’t speak too often but when they do, it’s at the precise moment that Jeremy Clarkson is sharing some very important information and you miss it, no point in saying “shush” as that just makes things worse, “Shush, why Shush, what’s happening, what’s he talking about that’s so important that I’ve got to shush, has Richard Hammond invented a cure for Cancer? By which time you’ve missed what he was saying anyway and you are even more in the dog house. Then just when you don’t want it, it’s time to go to bed, and you get the Library treatment, which was precisely what you wanted when you were watching TV

 I have a pair of Bose “Quiet Comfort Noise Cancelling Headphones” which I always take on Holiday. They work by use of analog circuits or digital signal processing. Adaptive algorithms are designed to analyze the waveform of the background aural or nonauralnoise, then based on the specific algorithm generate a signal that will either phase shift or invert the polarity of the original signal. This inverted signal (in antiphase) is then amplified and a transducer creates a sound wave directly proportional to the amplitude of the original waveform, creating destructive interference. This effectively reduces the volume of the perceivable noise. Translated this means they eliminate the sound of the plane’s engines, and you don’t have to turn the volume of the in-flight movie up to an unacceptable level.

As I said before I really do like Women, it would probably be less stressful for me If I didn't and I was to become a Monk, but that’s not the life for me so In order to survive I believe that Mother Nature has taken pity on me and allowed my hearing to evolve. I seem to have developed noise cancelling ears. Although my hearing is perfect, my ears work in exactly the opposite way to my Noise cancelling headphones. I can hear every note of a Formula One cars engine as the gears change, the pitch alters and it screams down the track. Watching the opening sequence of Point Break, I can hear the next cartridge slide into the chamber as he cocks his pump action shotgun, in preparation for his next shot. I hear his bullet tear through the target and the hollow tinkling of a spent bullet casing ejected from Johnny Utah's (Keanu Reeves) semi automatic Sig Sauer P226 9 mm, as it hits the ground, bouncing  twice before it settles and becomes silent.




No matter how softly they talk, I never miss a word spoken by Jeremy, Richard, James, Tiff and Jason. If she’s sat opposite me I can see my girlfriend’s lips moving but I can’t hear a word she’s saying until the commercial break or 'Jessica' by the 'Allman Brothers' starts to play.

Noise cancelling ears do have a couple of disadvantages, and I must remember to write to the TV broadcasters and ask if they could put subtitles on the screen when Vicky Butler-Henderson is on Fifth Gear and the same when Rachel Riley is on The Gadget Show so that I know what they’re talking about.

          myRIO-1950, FPGA output frequency incorrect   

Hi All,

 

Working with a myRIO-1950 and I am getting my feet wet with the FPGA for the first time. I have a simple program where I am trying to generate a sine wave at 20kHz. I can generate the waveform just fine, but the frequency is always off. This is irrespective of the actual target frequency.

 

For example if I set the frequency to 5kHz, my output is roughly 5.8kHz. If I set it to 750Hz, my output is 850Hz. I am certain this is a mistake or an oversight on my part, and I am hopeful someone can provide some info.

 

 


          Waveform data missed in report   

During test, I  log Oscilloscope 4 channel's data as an 1D  array of labview  analog waveform.  I can view the report(HTML or XML) with waveform in the Teststand  Execution Mode.

But when I exit from Teststand, and browse the report again.  I can't find the waveform in the report.

Do I miss any setting steps,or  Is there bug in Teststand 2012.


          army communication abilities with regard to leaders   
No need trying to find your daily horoscope in your newspaper or on the Internet every day of your life. Use the Universal Horoscope below. You'll be glad you did.



If you can afford $250 for a pair of headphones and tinnitus Force XP510s, you'll take your gaming experience to the limit. They have a dongle that you fit into the PS3 controller and give markedly better voice quality than other headsets. They are extremely comfortable for longer gaming sessions and the battery lasts up to 15 hours. Where they really come into their own is that you can take calls and stream music without having to leave the game. Higher-end headphones give you better sound quality than the Sony headset and improved voice quality.

The X11 ear cups with 40 mm drivers can generate higher sound quality. The large, comfortable ear cups design has a deep bass audio that is suitable military radios for civilian use all types of digital games.

Smith Wigglesworth, was born June 8, 1859 to very poor parents, in Menston England. His father worked hard to feed his family , making very little money for his labor. His mother pulled turnips , and Smith often worked with her. Young Smith, became a born again christian at 8 yrs. old. His parents weren't christians but they often attended the Methodist church. Smith, married a soldier radio waveform specification Preacher, by the name of Polly Featherstone, on May 2, 1882. Smith Wigglesworth was illiterate . His wife Polly, taught him how to read. Smith learned how to read the Bible. The Bible, was the only reading material he allowed in his home. Smith, and his wife Polly, had one daughter, and four sons. Smith was a plumber by trade, but soon abandoned it after he became a full time Preacher.

What could be more fun than owning a business dealing with a hobby? Even if you live in a large city, many hobbies don't generate enough business to pay the bills. The internet, on the other hand is plenty big enough to make a living with a site on tiny niches like ham radio foundation licence antennas, radio controlled aircraft, specialty gardening and just about anything else you can imagine.

4) Go during the week and make sure you have lots of time to spend at the store. Weekends are crowded, especially towards the beginning of the month and you'll have to fight with crowds to shop. Go during the week and you'll likely catch the newest things that they've put out and avoid the crowds.

Higher Quality-Stop buying those crummy sounding Xbox headsets every 3-4 months and buy 1 (better sounding) headset every 2-3 years. It will increase your kill death ratio by hearing more sounds, and the increased clarity with the Xbox live chat mic will give your team an advantage. And by not buying a new standard headset every couple months, you can save money to buy more games!

          DIY DSO150 Digitális oszcilloszkóp szett 1Msps SMD forrasztott 2.4 "TFT kijelző - Jelenlegi ára: 9 023 Ft   
Introduction: This is a DIY kit, need to have some basic electronic activity and ability. SMD soldered version, operation is more easier.
Features: Brand new and high quality.
Kits using ARM Cortex-M3 processor (STM32F103C8), and includes a 2. 4-inch color TFT display can be used as ARM test development board. Circuit is simple and the kit is inexpensive.
Characteristics of indicators: Supply voltage: DC 9V
Maximum real-time sampling rate: 1Msps
Accuracy: 12Bit
Sampling buffer depth: 1024 bytes
Analog bandwidth: 0 - 200KHz
Vertical Sensitivity: 5mV / Div - 20V / Div
Adjustable vertical displacement, and with instructions
Input impedance: 1MÎ?
Maximum input voltage: 50Vpp (1: 1 probe), 400Vpp (10: 1 probe)
Coupling modes: DC / AC / GND
The horizontal time base range: 10ÎĽs / Div - 50s / Div (1-2-5 progressive manner)
With automatic, regular and one-shot mode, easy to capture the moment waveform
Available rising or falling edge trigger
Adjustable trigger level position, and with instructions
Observable previous trigger waveform (negative delay)
Can freeze at any time waveform display (HOLD function)
Comes 1Hz /3. 3V square wave test signal source
Package Included: 1 x DIY DSO150 Digital Oscilloscope Kit
1 x EN Instruction
NO Retail Box. Packed Safely in Bubble Bag.
P089997
Vásárlással kapcsolatos fontos információk:
Köszöntjük oldalunkon!
Az adásvétel megkönnyítése érdekében, kérjük olvassa el vásárlási feltételeinket, melyeket rendelésével automatikusan elfogad.
Kedvezmény: Amennyiben termékeink közül minimum 50 db-ot vásárol, kedvezményt biztosítunk. Kérjük igényelje a kedvezményt ügyfélszolgálatunktól.
US hálózati csatlakozós termékeink esetén, külön rendelhető a termékeink között található US-EU átalakító adapter.
Fontos! Ha a leírásban NEM szerepel, hogy ? We dont offer color/pattern/size choice? (szín/minta/méret nem választható), akkor rendeléskor kérjük mindenképp írja bele a megjegyzés rovatba a kiválasztott színt/mintát/méretet, ellenkező esetben kollégáink véletlenszerűen postázzák. Ez esetben utólagos reklamációt nem fogadunk el.
Ahol a ? We dont offer color/pattern/size choice? kijelentés szerepel, sajnos nincs lehetőség szín/minta/méret kiválasztására. Ilyenkor kollégáink véletlenszerűen küldik a termékeket.
Kommunikáció: minden esetben kizárólag email-ben, mert így visszakövethetőek a beszélgetések.
Hibás termék: visszautaljuk a vételárat vagy újrapostázzuk a terméket megállapodástól függően, miután visszapostázta a megadott címre.
Visszautalás: a vételárat visszautaljuk, vagy a terméket újraküldjük ha nem érkezik meg a termék.
Ez esetben kérjük jelezze email-en keresztül, hogy megoldást találhassunk a problémára!
Garancia: 3 hónap! Amennyiben valóban hibás a termék, kérjük vegye fel velünk a kapcsolatot és kicseréljük vagy visszavásároljuk a terméket megegyezéstől függően.
Számlázás: Az elektronikus számlát (pdf. formátumú) Angliában regisztrált cégünk állítja ki, az ÁFA nem kimutatható, az utalás magyar céges számlánkra történik.
A szállítási idő: az összeg átutalása után 9-12 munkanap, de a postától függően előfordulhat a 25-35 munkanap is! A posta szállítási idejéért cégünk nem tud felelősséget vállalni, az említett szállítási idő tájékoztató jellegű!
Nagyon fontos! Kérjük ne vásároljanak akkor, ha nem tudják kivárni az esetleges 35 munkanap szállítási időt!
strong>Postázás: Termékeinket külföldről postázzuk.
Nagy raktárkészletünk miatt előfordulhat, hogy egy-két termék átmenetileg vagy véglegesen elfogy raktárunkból, erről mindenképp időben értesítjük és megfelelő megoldást kínálunk.
Utalás: Kizárólag átutalást (házibank, netbank) fogadunk el (bankszámláról bankszámlára),   Banki/Postai készpénz befizetést/Rózsaszín csekket ill. egyéb NEM!
Átutalásnál a rendelésszámot feltétlenül adja meg a közlemény rovatba, ellenkező esetben előfordulhat, hogy nem tudjuk visszakeresni a rendelését. Ebben az esetben nyilvánvalóan nem tudjuk a terméket postázni ill. Önt sem tudjuk értesíteni, hiszen nincs kiindulópontunk!
Fizetés/szállítás:
-2000Ft felett (postaköltséggel együtt) CSAK es KIZÁRÓLAG ajánlottan postázzuk a terméket az alábbiak szerint:
-Ajánlott posta esetén az első termékre a posta 890Ft , minden további 250 Ft/db.
- Sima Levélként 2000Ft alatt: az első termékre a posta 250Ft, minden további termék posta díja 250Ft/db.
Átvétel: azoknak a vásárlóknak akik nem veszik át a rendelt terméket a postától és visszaküldésre kerül a termék cégünkhöz, a postaköltség újbóli megfizetésével tudjuk csak újraküldeni, illetve amennyiben az összeget kéri vissza, a termékek árát tudjuk csak visszautalni, postaköltség nélkül. A termék átvétele az Ön felelőssége! Amennyiben a Mi hibánkból nem tudja átvenni, pl téves címzés miatt, így a postaköltség minket terhel.
Amennyiben a megrendelést követő 24 órán belül nem kap emailt tőlünk, ez azt jelenti, hogy az email cím (freemail és citromail esetén főleg) visszadobta a küldött email-t. Ilyenkor küldjön üzenetet egy másik e-mail címről.
Kellemes Vásárlást Kívánunk!
DIY DSO150 Digitális oszcilloszkóp szett 1Msps SMD forrasztott 2.4
Jelenlegi ára: 9 023 Ft
Az aukció vége: 2017-07-22 03:20
          DSO138 2.4 "TFT Digitális oszcilloszkóp + szonda - Jelenlegi ára: 5 973 Ft   
Features: Brand new and high quality.
DSO138 Kit: This kit uses ARM Cortex-M3 processor (STM32F103C8), and includes a 2. 4-inch color TFT display screen, can be used as ARM test development board.
Can be secondary development on the basis of this kit, for example, it can be changed to Millivoltmeter, data loggers.
Adjustable vertical displacement, and with instructions.
With automatic, regular and one-shot modes, easy to capture the moment waveform.
Available rising or falling edge trigger.
Observable previous trigger waveform (negative delay).
Can freeze at any time waveform display (HOLD function).
Comes 1Hz /3. 3V square wave test signal source.
With waveform parameter digital display, including frequency, period, pulse width, duty ratio, MAX. /MIN. /AVG. /Peak-Peak/virtual values.
Waveform storage function: will not lose the waveform after power off.
Short-circuit and open-circuit detection: can help the user find out the soldering error.
TFT controller recognition function.
The SMD has been soldered, more suitable for electronic beginner.
Specifications: Type: NOT Soldered DIY Kit / SMD Soldered Kit (Optional).
Maximum Real-time Sampling Rate: 1Msps.
Accuracy: 12Bit.
Sampling Buffer Depth: 1024 bytes.
Analog Bandwidth: 0-200KHz.
Vertical Sensitivity: 10mV / Div - 5V / Div (1-2-5 progressive manner).
Input Impedance: 1M?.
Maximum Input Voltage: 50Vpp (1: 1 probe), 400Vpp (10: 1 probe).
Coupling Modes: DC / AC / GND.
The Horizontal Time Base Range: 10ÎĽs / Div - 50s / Div (1-2-5 progressive manner).
Supply Voltage: DC 9V.
PCB Size: 117 * 76mm / 4. 6 * 3in.
Screen Size: 52 * 40mm / 2 * 1. 57in.
Package Included: 1 * DSO138 DIY Digital Oscilloscope Kit
1 * Probe
3 * User Manual(English)
NO Retail Box. Packed Safely in Bubble Bag.
P074998
Vásárlással kapcsolatos fontos információk:
Köszöntjük oldalunkon!
Az adásvétel megkönnyítése érdekében, kérjük olvassa el vásárlási feltételeinket, melyeket rendelésével automatikusan elfogad.
Kedvezmény: Amennyiben termékeink közül minimum 50 db-ot vásárol, kedvezményt biztosítunk. Kérjük igényelje a kedvezményt ügyfélszolgálatunktól.
US hálózati csatlakozós termékeink esetén, külön rendelhető a termékeink között található US-EU átalakító adapter.
Fontos! Ha a leírásban NEM szerepel, hogy ? We dont offer color/pattern/size choice? (szín/minta/méret nem választható), akkor rendeléskor kérjük mindenképp írja bele a megjegyzés rovatba a kiválasztott színt/mintát/méretet, ellenkező esetben kollégáink véletlenszerűen postázzák. Ez esetben utólagos reklamációt nem fogadunk el.
Ahol a ? We dont offer color/pattern/size choice? kijelentés szerepel, sajnos nincs lehetőség szín/minta/méret kiválasztására. Ilyenkor kollégáink véletlenszerűen küldik a termékeket.
Kommunikáció: minden esetben kizárólag email-ben, mert így visszakövethetőek a beszélgetések.
Hibás termék: visszautaljuk a vételárat vagy újrapostázzuk a terméket megállapodástól függően, miután visszapostázta a megadott címre.
Visszautalás: a vételárat visszautaljuk, vagy a terméket újraküldjük ha nem érkezik meg a termék.
Ez esetben kérjük jelezze email-en keresztül, hogy megoldást találhassunk a problémára!
Garancia: 3 hónap! Amennyiben valóban hibás a termék, kérjük vegye fel velünk a kapcsolatot és kicseréljük vagy visszavásároljuk a terméket megegyezéstől függően.
Számlázás: Az elektronikus számlát (pdf. formátumú) Angliában regisztrált cégünk állítja ki, az ÁFA nem kimutatható, az utalás magyar céges számlánkra történik.
A szállítási idő: az összeg átutalása után 9-12 munkanap, de a postától függően előfordulhat a 25-35 munkanap is! A posta szállítási idejéért cégünk nem tud felelősséget vállalni, az említett szállítási idő tájékoztató jellegű!
Nagyon fontos! Kérjük ne vásároljanak akkor, ha nem tudják kivárni az esetleges 35 munkanap szállítási időt!
strong>Postázás: Termékeinket külföldről postázzuk.
Nagy raktárkészletünk miatt előfordulhat, hogy egy-két termék átmenetileg vagy véglegesen elfogy raktárunkból, erről mindenképp időben értesítjük és megfelelő megoldást kínálunk.
Utalás: Kizárólag átutalást (házibank, netbank) fogadunk el (bankszámláról bankszámlára),   Banki/Postai készpénz befizetést/Rózsaszín csekket ill. egyéb NEM!
Átutalásnál a rendelésszámot feltétlenül adja meg a közlemény rovatba, ellenkező esetben előfordulhat, hogy nem tudjuk visszakeresni a rendelését. Ebben az esetben nyilvánvalóan nem tudjuk a terméket postázni ill. Önt sem tudjuk értesíteni, hiszen nincs kiindulópontunk!
Fizetés/szállítás:
-2000Ft felett (postaköltséggel együtt) CSAK es KIZÁRÓLAG ajánlottan postázzuk a terméket az alábbiak szerint:
-Ajánlott posta esetén az első termékre a posta 890Ft , minden további 250 Ft/db.
- Sima Levélként 2000Ft alatt: az első termékre a posta 250Ft, minden további termék posta díja 250Ft/db.
Átvétel: azoknak a vásárlóknak akik nem veszik át a rendelt terméket a postától és visszaküldésre kerül a termék cégünkhöz, a postaköltség újbóli megfizetésével tudjuk csak újraküldeni, illetve amennyiben az összeget kéri vissza, a termékek árát tudjuk csak visszautalni, postaköltség nélkül. A termék átvétele az Ön felelőssége! Amennyiben a Mi hibánkból nem tudja átvenni, pl téves címzés miatt, így a postaköltség minket terhel.
Amennyiben a megrendelést követő 24 órán belül nem kap emailt tőlünk, ez azt jelenti, hogy az email cím (freemail és citromail esetén főleg) visszadobta a küldött email-t. Ilyenkor küldjön üzenetet egy másik e-mail címről.
Kellemes Vásárlást Kívánunk!
DSO138 2.4
Jelenlegi ára: 5 973 Ft
Az aukció vége: 2017-07-22 03:19
          Save $1,200 On A New EDL11000 Watt Yamaha Diesel Generator   
City/Town: Clarenville
Area: Eastern
Description:

Huge Savings On All In Stock Yamaha Generators

New EDL11000 Yamaha Diesel Generator
MSRP: $7199
SALE PRICE: $5999

Financing Available!!

All Yamaha Generators Come Standard with a 3 Year Factory Warranty

The largest member of our diesel family of generators is the EDL11000SDE. Despite its high output, its compact design, low overall height and reduced noise levels make it a versatile performer. If lower running costs and easier maintenance access are important to your business, farm, job site or off grid application, then check out extensive range of features the EDL11000SDE offers.

Features

  • Powered by D722 vertical type diesel engine; 719cc, liquid-cooled (rad with cooling fan), three cylinder, 4-stroke diesel engine with electronic ignition. Max power is 12.2 kW or 16.4 hp.
  • Compact and lightweight design... smallest and lightest in its class
  • Key operated electric starting
  • Dual 120 & 240 volt output
  • Rated AC output for continuous use is 10 kVA (10,000 watts) / 83.3 amps @ 120 volts & 41.7 amps @ 240 volts
  • Generator unit is directly connected to the engine eliminating the need for reduction gears.
  • External ground terminal
  • Maintenance-free brushless alternator offers superior reliability and reduced maintenance.
  • Neutral bonded to frame
  • Skewed rotor keeps waveform distortion to a minimum
  • Run time at rated load is 7 hours
  • Dual Ground Fault Interrupter Circuit receptacles for added safety
  • Cooling fan is driven off the crankshaft for reduced wind noise
  • High capacity radiator
  • Liquid-cooling maintains consistent performance and reduces mechanical engine noise.
  • Large capacity muffler helps to reduce exhaust noise.
  • 200 hour oil change cycle
  • Convenient user-friendly control panel
  • Large opening maintenance hatch for easy access to oil filter, air filter, fuel filter, battery etc.
  • Dedicated terminals for easy connection to Automatic Transfer Switches (ATS)
  • Main breaker system protects against large amounts of excess current
  • Separate sub-circuit breakers for each GFIC receptacle protects against small amounts of excess current
  • Warning lights for low battery, low oil pressure and coolant temperature
  • Glow plug timer indicator light
  • Automatic engine shutdown system in the event of low oil pressure or engine over heating
  • Large size, washable, "no tools required" dual stage air filter
  • Convenient exterior drain plugs for oil and coolant
  • 28 litre fuel tank means extended run times
  • Large fuel filler hole and fuel gauge
  • Hour meter
  • Heavy duty lifting hook and fork lift slots
  • Low emission EPA Tier 2 compliant
  • CSA approved (Canadian Standards Association)
  • 3-year warranty for "residential / home" use or "commercial use." 

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image

          Search for Astrophysical Tau Neutrinos in Three Years of IceCube Data   
PROQUEST-3711981

by: Xu, Donglian (Alabama U.)

Abstract:
High-energy cosmic neutrinos are expected to be produced in extremely energetic astrophysical sources such as active galactic nuclei (AGNs) and gamma ray bursts (GRBs). The IceCube Neu- trino Observatory has recently detected a diffuse astrophysical neutrino flux at 5.7$\sigma$ significance. One of the outstanding questions regarding astrophysical neutrinos is their flavor composition. Most standard oscillation scenarios predict tau neutrinos ($\nu_{\tau}$) in the astrophysical flux, which have a negligible background from cosmic ray induced atmospheric neutrinos. This work reports a search for high-energy astrophysical ντ with the IceCube neutrino observatory. This analysis has devised a new method to search for astrophysical ντ in the IceCube waveforms, and it is the first ντ analysis in IceCube that is more sensitive to a $\nu_{\tau}$ flux than other neutrino flavors. A total of three years of data was used, yielding a sensitivity of 5.1 × 10$^{−8}$ GeV cm$^{−2}$ s$^{−1}$ sr$^{−1}$ near the PeV region assuming a flux limit of E$^2\Phi_{\nu}$ < 1.0 × 10$^{−8}$ GeV cm$^{−2}$ s$^{−1}$ sr$^{−1}$ per neutrino flavor. Zero events were found. Differential upper limits for astrophysical $\nu_{\tau}$ are derived in the O(100) TeV to O(10) PeV regime based on the zero findings.
          Forum Post: HB analysis results with different SELECT options   
hi i am simulating a balun with its input/output matching network through HB analysis (using SNP file). While simulating I am getting two different values let’s say V1 and V2. Through SELECT options (" Terminal / Terminal and V- Reference Terminal / Instance with 2 terminals / Port (fixed R(port)) ") i got similar result (value V1) but using " Net (specify R) / Differential Nets (Specify R) " i am getting another same result (value V2). The value V2 is consistent with the time domain waveform simulated through HB analysis. Can anyone please guide me about the reason or mistake that I am possibly making. Thanks
          Long Range King VR-1000-B-II   
Long Range King VR-1000-B-II 1. Familiar with the various components of opening a box , these components include: With a special lock boxes containing transmitters and other components . The transmitter is installed in a fixed box , a panel of six launchers LED lights Each light represents a particular function . Now in the light of a frequency selective switch , based on users need to install . Switching frequency in the following two options were those with the “level” of the “ vertical ” xuanniu. Now a powers switch , charging JACK ( equipment optimized charging circuit ) and overload protection device . Xuanniu perpendicular to the beach with levels and the corresponding light , they fired waveform used to adjust so that equipment meet the conditions on the ground . counterclockwise spin to the general state of the lightresponse can make the greatest Department . Low rent and saline deposits in the large state to use bad addresses or darken in bright light JACK—the bottom two transmitter antenna is JACK , please note the correspondence between positive and negative electrodes . JACK remaining two can ben removed , recharge able battery has been installed in the factory equipment . off the side panel can be replaced battery , each battery can be used for many years . In six hours before charging ahead in the use , the use of light when the work began to darken , and then give charging the battery . Charger receiver equipped with the exclusive power adapters in use for six hours before charging ahead . TWISTED switch of a top receiver for the amount of fine-tuning sensors.
          Rapid Analysis of Anabolic Steroid Metabolites in Urine by Combining Field Asymmetric Waveform Ion Mobility Spectrometry with Liquid Chromatography and Mass Spectrometry   

TOC Graphic

Analytical Chemistry
DOI: 10.1021/acs.analchem.7b00940

          NOMA based Calibration for Large-Scale Spaceborne Antenna Arrays. (arXiv:1704.03603v2 [cs.IT] UPDATED)   

Authors: Yujie Lin, Shuai Wang, Xiangyuan Bu, Chengwen Xing, Jianping An

In the parallel calibration for transmitting phased arrays, the calibration receiver must separate the signals belonging to different antenna elements to avoid mutual interference. Existing algorithms encode different antenna elements' radiation with orthogonal signature codes, but these algorithms are far from desired for large-scale spaceborne antenna arrays. Considering the strictly limited resources on satellites, to improve hardware efficiency of large-scale spaceborne antenna arrays, in this work inspired by the idea of non-orthogonal multiple access (NOMA) we design a series of non-orthogonal signature codes for different antenna elements by Cyclically Shifting an m-Sequence (CSmS) with different offsets named as CSmS-NOMA signaling. This design can strike an elegant balance between the performance and complexity and is very suitable for large-scale spaceborne antenna arrays. It is shown that no matter how many antenna elements there are to be calibrated simultaneously, CSmS-NOMA signaling needs only one calibrating waveform generator and one matched filter. Hence it is much more efficient than the existing fully orthogonal schemes. In order to evaluate the achievable calibration accuracy, a unified theoretical framework is developed based on which the relationship between calibration accuracy and signal to noise ratio (SNR) has been clearly revealed. Furthermore, a hardware experiment platform is also built to assess the theoretical work. For all the considered scenarios, it can be concluded that the theoretical, simulated and experimental results coincide with each other perfectly.


           5 Ways Sensor Technology Can Improve City Infrastructure (Industry Perspective)    

More than 6.5 billion people are expected to live in cities by 2050, according to UN estimates. That figure represents more than double the number of people currently living in such settlements. In order to withstand the pressure on infrastructure that this process of urbanization will bring, smart cities — referring to a concept by which cities’ traditionally offline systems such as water supply networks are brought online and connected to sophisticated analysis and control systems — are expected to grow commensurate with this process of worldwide urbanization.

Alongside provisioning special, low-powered telecommunications networks to support their connectivity, sensor technology is the key means for driving the growth of these projects, which are expected to rise fourfold in number by 2025.

The following are just some of the ways in which the latest breed of low-power sensors, specifically designed for monitoring city infrastructure, are helping to make the smart city dream a reality.

1. Improved water management

Installing a network of smart, Internet of Tthings (IoT)-enabled sensors can greatly improve the efficiency of any water distribution network. A key benefit of smart water networks is reducing non-revenue water, or supply water physically lost as it passes through the system due to leakages. Advanced sensing technologies, such as analytical techniques that measure water usage within a closed geographic area to assess loss, can provide utilities with real-time visibility on any leaks occurring. Advanced data analytics can add further insights by parsing the raw information from the sensors. According to a World Bank study, 32 billion cubic meters of water are lost annually due to such issues which, among other reasons, can often be attributed to poor or aging infrastructure and theft.

2. Better wastewater management

Like water, wastewater management can also be improved by using smart networks to connect infrastructure with control and monitoring systems, such as SCADA (Supervisory Control and Data Acquisition) platforms. Combined sewer overflow and sanitary sewer overflow events occur whenever sewer systems are filled past capacity and are forced to spill contaminated contents from designated overflow sites. Such events can have devastating implications for nearby residents and for the local ecosystem. When a sewer gate malfunctioned in King County, Wash., in February, 11 homes were swamped and 24 residents displaced.

The more real-time monitoring capabilities a utility has at its disposal (such as data from sensors to measure water quality, pressure and velocity) the quicker it can react to changing conditions to initiate remedial mechanisms such as manipulating underground gates and valves or activating ancillary treatment sites. Fewer overflows also extends the lifetime of equipment throughout wastewater networks.

3. Better power

Although from a consumer’s perspective it may seem hard to distinguish between the electricity supplied from one outlet to the next, this is not the case for industrial users for whom the consistency of voltage, frequency and waveform can have important ramifications for manufacturing processes and machine life expectancy.

Variations in power quality can result from voltage sags, spikes and swells. Even interruptions lasting only a few milliseconds can damage sensitive equipment. Continuous power-quality monitoring uses advanced sensing technology to analyze and interpret raw measurement data to improve systemwide power-quality delivery. This ensures that urban infrastructure systems requiring a consistent supply of high-voltage power, such as an electrified light rail, suffer less damage (such as from overheating) and component failures during their useful lifespan.

4. Smart agriculture

In city environments, every square meter costs. In an effort to support the dietary needs of the often colossal populations that inhabit their limited spaces, urban farmers use unconventional infrastructure such as skyscrapers and rooftops to harvest crops in and atop vertical farms. To effectively grow within such structures — which can be significantly less accessible than the conventional rural landscapes where most traditional farms exist — such farmers need real-time access to vital agricultural parameters such as evapotranspiration rates, soil moisture saturation and groundwater conditions. Smart, IoT-powered sensors allow these agricultural pioneers 24/7 access to this vital information no matter where in the world (or city) they are located. Chicago is quickly emerging as America’s urban agriculture capital with 820 urban farms now in operation.

5. Air and weather monitoring enables safe construction

Measuring air quality and weather conditions is increasingly important for those involved in the construction of new infrastructure. Whether building residential units, roads, bridges or any other piece of infrastructure, activities such as land clearing, running diesel engines, demolitions and burning can all adversely impact air quality, placing the health of the general population (particularly those with respiratory diseases) at risk.

Assessing atmospheric conditions, such as wind speed and direction, is also important to predict the risk of such pollution spreading to adjoining territories. Research has demonstrated that asthmatics are 40 percent more likely to suffer acute asthma attacks on high pollution days than on days with good air quality. Whether mandated to comply with legislation, such as the EPA Clean Air Act, or proactively initiated by companies seeking to minimize their environmental footprint, measuring gaseous air pollutants such as nitrogen dioxide, sulfur dioxide, carbon monoxide, ozone and particulate matter helps reduce pollution for the benefit of all a city’s inhabitants.

Smart sensors and special IoT communication networks are the two key components of any smart city project. Initiatives to implement the technologies mentioned here, such as the London Air Quality Network (which may involve a significant open-source component) and San Francisco’s ongoing efforts to develop a smart sewer network, show that IoT-supported sensor technology can have a far-reaching impact on the lives of urban citizens around the world.

Sivan Cohen, P.E., is the general manager of Ayyeka Inc.
 


          WPF Graph - AxisDateTime with AbsoluteTimeStamp   

Hello,

 

I am trying to plot a few Observable Collection to Graph with AxisDateTime.

 

Graph:

<ni:Graph x:Name="Graphs_HPT_Temperature" PreferIndexData="False" RenderMode="Raster" Margin="10,10,10,10" Interactions="">
            <ni:Graph.Axes>
                <ni:AxisDateTime Location="Near" Label="Time (s)" Orientation="Horizontal">
                    <ni:AxisDateTime.MajorDivisions>
                        <ni:RangeLabeledDivisions TickMark="Rectangle"/>
                    </ni:AxisDateTime.MajorDivisions>
                </ni:AxisDateTime>
                <ni:AxisDouble Label="Temperature (°C)" Orientation="Vertical" Range="0, 100, System.Double"/>
            </ni:Graph.Axes>
            <ni:Graph.Plots>
                <ni:Plot Label="Temp 1">
                    <ni:PlotRendererGroup>
                        <ni:LinePlotRenderer Stroke="IndianRed"/>
                        <ni:PointPlotRenderer Stroke="Black" Fill="IndianRed"/>
                    </ni:PlotRendererGroup>
                </ni:Plot>
                <ni:Plot Label="Temp 2">
                    <ni:PlotRendererGroup>
                        <ni:LinePlotRenderer Stroke="DimGray" />
                        <ni:PointPlotRenderer Stroke="Black" Fill="DimGray"/>
                    </ni:PlotRendererGroup>
                </ni:Plot>
                <ni:Plot Label="Temp 3">
                    <ni:PlotRendererGroup>
                        <ni:LinePlotRenderer Stroke="Blue" />
                        <ni:PointPlotRenderer Stroke="Blue" Fill="LimeGreen"/>
                    </ni:PlotRendererGroup>
                </ni:Plot>
            </ni:Graph.Plots>
        </ni:Graph>

I am defining source of data like this (all three data sources - randValues, randValues2 and randValues3 - are ObservableCollection<double> :

Graphs_HPT_Temperature.Data[0] = randValues;
Graphs_HPT_Temperature.Data[1] = randValues2;
Graphs_HPT_Temperature.Data[2] = randValues3;

ObservableCollections are filled with data every second. The following picture describes my problem, when I am using AxisDateTime, the showing date is relative (starting from 1.1.0001) and not absolute. How can I get the absolute date (timestamp) on my AxisDateTime?

ni_picture.PNG

I know I can use Waveform structure for these, but when the ObservableCollection contains more than 1000 samples, I need to delete first sample of the collection. Unfortunately, Waveform contains only Append function.

 

Thanks for your answer.


          Chip Hall of Fame: Intersil ICL8038 Waveform Generator   
Intersil’s somewhat cranky chip brought complex sound generation to consumer electronics
           Observations of changes in acoustic emission waveform for varying seeded defect sizes in a rolling element bearing    
Aldossary, S. and Hamzah, R. and M. B. A., D. (2009) Observations of changes in acoustic emission waveform for varying seeded defect sizes in a rolling element bearing. Applied Acoustics, 70 (1). pp. 58-81. ISSN 0003682X
          NOMA based Calibration for Large-Scale Spaceborne Antenna Arrays. (arXiv:1704.03603v2 [cs.IT] UPDATED)   

Authors: Yujie Lin, Shuai Wang, Xiangyuan Bu, Chengwen Xing, Jianping An

In the parallel calibration for transmitting phased arrays, the calibration receiver must separate the signals belonging to different antenna elements to avoid mutual interference. Existing algorithms encode different antenna elements' radiation with orthogonal signature codes, but these algorithms are far from desired for large-scale spaceborne antenna arrays. Considering the strictly limited resources on satellites, to improve hardware efficiency of large-scale spaceborne antenna arrays, in this work inspired by the idea of non-orthogonal multiple access (NOMA) we design a series of non-orthogonal signature codes for different antenna elements by Cyclically Shifting an m-Sequence (CSmS) with different offsets named as CSmS-NOMA signaling. This design can strike an elegant balance between the performance and complexity and is very suitable for large-scale spaceborne antenna arrays. It is shown that no matter how many antenna elements there are to be calibrated simultaneously, CSmS-NOMA signaling needs only one calibrating waveform generator and one matched filter. Hence it is much more efficient than the existing fully orthogonal schemes. In order to evaluate the achievable calibration accuracy, a unified theoretical framework is developed based on which the relationship between calibration accuracy and signal to noise ratio (SNR) has been clearly revealed. Furthermore, a hardware experiment platform is also built to assess the theoretical work. For all the considered scenarios, it can be concluded that the theoretical, simulated and experimental results coincide with each other perfectly.


          Radar Firmware Lead - Duotech Services Inc - Franklin, NC   
The candidate will be expected to perform technical activities associated with radar timing and waveforms, signal and data processing techniques, implementation...
From Indeed - Mon, 26 Jun 2017 15:00:29 GMT - View all Franklin, NC jobs
          Emerging technologies help advance the understanding, detection and control of epilepsy    
A smartphone-induced EEG waveform and an intelligent algorithm for seizure detection are among the emerging technologies to be unveiled at the American Epilepsy Society's (AES) 69th Annual Meeting. (2015-12-07)
          (USA-CA-El Segundo) Communications Payload Systems Engineer   
As a Communications Systems Engineer (Level 4), you will design and develop state-of-the-art communication systems for space-based applications for commercial, civil and/or national security programs. You will be part of a highly-motivated team that works with domestic or international customers on their latest satellite systems. *Primary Responsibilities*: * Lead others to evaluate customer/operational needs to define system performance requirements, develop satellite communications system and payload architectures, integrate technical parameters and assure compatibility of physical, functional, and program interfaces. * Lead, develop, maintain and identify improvements for the planning, organization, implementation and monitoring of requirements management processes, tools, risk, issues, opportunity management and technology readiness assessment processes. * Mentor the program junior payload systems engineers and review their work for quality. * Perform system-level integration, system simulation, communication link and/or capacity modeling and analysis. * Apply an interdisciplinary, collaborative approach to lead activities to plan, design, develop and verify complex lifecycle balanced system solutions. Project assignments typically span the complete program life cycle, from internal trades, concept studies and system definition, to satellite development, launch, and on-orbit operations and test. Candidates will belong to a systems engineering team interacting with customers, suppliers, program management, integration and test engineers, and senior technologists. *This position is contingent upon the award* Boeing is the world's largest aerospace company and leading manufacturer of commercial airplanes and defense, space and security systems. We are engineers and technicians. Skilled scientists and thinkers. Bold innovators and dreamers. Join us, and you can build something better for yourself, for our customers and for the world. This position requires an active (or ability to obtain) U.S. Security Clearance,*for which the US Government requires US Citizenship*. *Typical Education & Experience*: Degree and typical experience in engineering classification: Bachelor's and 9 or more years' experience, Master's with 7 or more years' experience or PhD with 4 or more years' experience. Bachelor, Master or Doctorate of Science degree from an accredited course of study, in engineering, computer science, mathematics, physics or chemistry. ABET is the preferred, although not required, accreditation standard. Qualified candidate should be able to demonstrate proficiency in analog and digital communication theory and systems, RF/microwave design and theory, digital signal processing (DSP), electromagnetics, waveform design, optical or networked communications, and antenna theory while applying their theoretical knowledge in resolving real world problems. Technical team leadership experience is also required. *Basic Skills*: Technical team leadership experience required. Experience with satellite communications. *Preferred Skills*: * Proficiency in Matlab and C is desirable * Experience with new business development or program execution for commercial and/or Milsatcom communications payload systems engineering. / / **Job:** **Systems Engineering Engineer* **Organization:** **S&MS Engineering* **Title:** *Communications Payload Systems Engineer* **Location:** *California-El Segundo* **Requisition ID:** *1700008148*
          (USA-AL-Huntsville) Software Engineer   
_*Primary Overview:*_ This position is for the PAC-3 Program located in Huntsville, Alabama. Extensive travel is required to Huntington Beach, CA, during site transition of possibly up to 90 – 100% through approximately 2018. _*Primary Responsibilities:*_ * Leads activities to develop, document and maintain architectures, requirements, algorithms, interfaces and designs for software systems. * Leads development of code and integration of complex software components into a fully functional software system. * Develops software verification plans, test procedures and test environments, executing the test procedures and documenting test results to ensure software system requirements are met. * Provides technical leadership for software projects and leads software supplier management activities. * Leads development, selection, tailoring and deployment of processes, tools and metrics. * Plans, executes and documents software research and development projects. * Serves as a subject matter expert for software domains, system-specific issues, processes and regulations. * Tracks and evaluates software team and supplier performance to ensure product and process conformance to project plans and industry standards. * Works under minimal direction. Boeing is the world's largest aerospace company and leading manufacturer of commercial airplanes and defense, space and security systems. We are engineers and technicians. Skilled scientists and thinkers. Bold innovators and dreamers. Join us, and you can build something better for yourself, for our customers and for the world. *This position requires the ability to obtain a US Security Clearance, for which the US Government requires US Citizenship.* _*Degree and typical experience in engineering classification:*_ Bachelor's and 9 or more years' experience, Master's with 7 or more years' experience or PhD with 4 or more years' experience. Bachelor, Master or Doctorate of Science degree from an accredited course of study, in engineering, computer science, mathematics, physics or chemistry. ABET is the preferred, although not required, accreditation standard. _*Basic Qualifications:*_ * Experience or education to collect, organize, synthesize, and analyze data; summarize findings; develop conclusions and recommendations from appropriate data sources. * Basic familiarity with software programming languages. Programming languages encompass higher order languages, auto-coded languages and assembly languages. * Basic familiarity with real-time software architecture and design methodologies. Ability to synthesize real-time software architectures and designs that meet real-time requirements, characteristics and constraints. * Basic familiarity with digital processor design, memory mapping and external I/O implementations. Ability to assimilate hardware implementations and constraints from processor handbooks and device data sheets. _*Preferred Skills:*_ * Experience developing mathematical algorithms, especially for antenna array signal processing, including waveform selection, target search, detection and track under the direction of senior team members. * Experience in radar and signal processing, and an understanding of the physics of electro-magnetic propagation. * Able to isolate processor and external I/O problems with the use of with processor probes and digital analyzers. * Experience with Green Hills Development Environment, LabVIEW, ClearCase, ADA, C , tracker theory, sensor or signal processing. **Job:** **Software Engineer* **Organization:** **N&SS Business Chief Engineer* **Title:** *Software Engineer* **Location:** *Alabama-Huntsville* **Requisition ID:** *1700007964*
          (USA-AL-Huntsville) Entry Level Software Engineer   
_*Primary Overview: *_ This position is for the PAC-3 Program located in Huntsville, Alabama. Extensive travel is required to Huntington Beach, CA, during site transition of possibly up to 90 – 100% through approximately 2018. _*Primary Responsibilities:*_ * Assists with the documentation and maintenance of architectures, requirements, algorithms, interfaces and designs for software systems. * Develops and maintains code and integrates software components into a fully functional software system. * Assists with test procedures and documenting test results to ensure software system requirements are met. * Gathers information to support software project management. * Documents deployed processes and tools and collect metrics. * Supports software research and development projects. * Troubleshoots basic software issues. * Works under close supervision. Boeing is the world's largest aerospace company and leading manufacturer of commercial airplanes and defense, space and security systems. We are engineers and technicians. Skilled scientists and thinkers. Bold innovators and dreamers. Join us, and you can build something better for yourself, for our customers and for the world. *This position requires the ability to obtain a US Security Clearance, for which the US Government requires US Citizenship. * _*Degree and typical experience in engineering classification:*_ Bachelor's and 2 or more years' experience or a Master's degree with experience. Bachelor, Master or Doctorate of Science degree from an accredited course of study, in engineering, computer science, mathematics, physics or chemistry. ABET is the preferred, although not required, accreditation standard. This position is for the PAC-3 Program located in Huntsville, Alabama. Extensive travel is required to Huntington Beach, CA, during site transition of possibly up to 90 – 100% through approximately 2018. _*Basic Qualifications:*_ * Experience or education to collect, organize, synthesize, and analyze data; summarize findings; develop conclusions and recommendations from appropriate data sources. * Basic familiarity with software programming languages. Programming languages encompass higher order languages, auto-coded languages and assembly languages. * Basic familiarity with real-time software architecture and design methodologies. Ability to synthesize real-time software architectures and designs that meet real-time requirements, characteristics and constraints. * Basic familiarity with digital processor design, memory mapping and external I/O implementations. Ability to assimilate hardware implementations and constraints from processor handbooks and device data sheets. _*Preferred Qualifications:*_ * Hands-on experience developing mathematical algorithms, especially for antenna array signal processing, including waveform selection, target search, detection and track under the direction of senior team members. * Experience in radar and signal processing, and the ability to learn the physics of electro-magnetic propagation. * Able to isolate processor and external I/O problems with the use of with processor probes and digital analyzers. * Experience with Green Hills Development Environment, LabVIEW, ClearCase, ADA, C , tracker theory, sensor or signal processing. **Job:** **Software Engineer* **Organization:** **N&SS Business Chief Engineer* **Title:** *Entry Level Software Engineer* **Location:** *Alabama-Huntsville* **Requisition ID:** *1700007963*
          (USA-CA-El Segundo) Entry Level DSP Subsystems/Algorithm Engineer   
As a DSP Subsystems Engineer (Level 2), you will design and develop state-of-the-art, space-based communication systems for commercial, civil and/or national security programs. You will be part of a highly-motivated team that works with domestic or international customers on their latest satellite systems. *Primary Responsibilities*: • Defining and developing satellite communications system and unit architecture • Defining and verifying requirements and interfaces • Developing and verifying signal processing algorithms • Supporting trade studies • Supporting unit-level integration and performance simulations • Supporting HDL-level design and verification • Supporting hardware procurement, design reviews, and unit sell-offs *This position is contingent upon the award* Project assignments typically span the unit life cycle, from internal trades, concept studies and system definition, to satellite unit development and test. Candidates will belong to a systems engineering team interacting with customers, suppliers, program management, integration and test engineers, and senior technologists. Boeing is the world's largest aerospace company and leading manufacturer of commercial airplanes and defense, space and security systems. We are engineers and technicians. Skilled scientists and thinkers. Bold innovators and dreamers. Join us, and you can build something better for yourself, for our customers and for the world. This position requires an active (or ability to obtain) U.S. Security Clearance,*for which the US Government requires US Citizenship*. *Typical Education & Experience:* Degree and typical experience in engineering classification: Bachelor's and 2 or more years' experience or a Master's degree with experience. Bachelor, Master or Doctorate of Science degree from an accredited course of study, in engineering, computer science, mathematics, physics or chemistry. ABET is the preferred, although not required, accreditation standard. *Preferred Qualifications*: • Proficiency in Matlab/Simulink • Knowledge of HDL development concepts • Focus area of signal processing and/or digital communications highly desired. *Other Job Related Information/Qualifications*: Qualified candidate should be able to demonstrate proficiency in digital communication theory and systems, digital signal processing (DSP), waveform design and implementation, development of algorithms for hardware implementation on ASICs or FPGAs, and verification planning and principles, while applying their theoretical knowledge in resolving real world problems. **Job:** **Systems Engineering Engineer* **Organization:** **S&MS Engineering* **Title:** *Entry Level DSP Subsystems/Algorithm Engineer* **Location:** *California-El Segundo* **Requisition ID:** *1700008509*
          (USA-AL-Huntsville) Entry Level Software Engineer   
_*Primary Overview:*_ This position is for the PAC-3 Program located in Huntsville, Alabama. Extensive travel is required to Huntington Beach, CA, during site transition of possibly up to 90 – 100% through approximately 2018. _*Primary Responsibilities:*_ * Assists with the documentation and maintenance of architectures, requirements, algorithms, interfaces and designs for software systems. * Develops and maintains code and integrates software components into a fully functional software system. * Assists with test procedures and documenting test results to ensure software system requirements are met. * Gathers information to support software project management. * Documents deployed processes and tools and collect metrics. * Supports software research and development projects. * Troubleshoots basic software issues. * Works under close supervision. Boeing is the world's largest aerospace company and leading manufacturer of commercial airplanes and defense, space and security systems. We are engineers and technicians. Skilled scientists and thinkers. Bold innovators and dreamers. Join us, and you can build something better for yourself, for our customers and for the world. *This position requires the ability to obtain a US Security Clearance, for which the US Government requires US Citizenship.* Bachelor, Master or Doctorate of Science degree from an accredited course of study, in engineering, computer science, mathematics, physics or chemistry. ABET is the preferred, although not required, accreditation standard. This position is for the PAC-3 Program located in Huntsville, Alabama. Extensive travel is required to Huntington Beach, CA, during site transition of possibly up to 90 – 100% through approximately 2018. _*Basic Qualifications:*_ * Experience or education to collect, organize, synthesize, and analyze data; summarize findings; develop conclusions and recommendations from appropriate data sources. * Basic familiarity with software programming languages. Programming languages encompass higher order languages, auto-coded languages and assembly languages. * Basic familiarity with real-time software architecture and design methodologies. Ability to synthesize real-time software architectures and designs that meet real-time requirements, characteristics and constraints. * Basic familiarity with digital processor design, memory mapping and external I/O implementations. Ability to assimilate hardware implementations and constraints from processor handbooks and device data sheets. _*Preferred Skills:*_ * Hands-on experience developing mathematical algorithms, especially for antenna array signal processing, including waveform selection, target search, detection and track under the direction of senior team members. * Experience in radar and signal processing, and the ability to learn the physics of electro-magnetic propagation. * Able to isolate processor and external I/O problems with the use of with processor probes and digital analyzers. * Experience with Green Hills Development Environment, LabVIEW, ClearCase, ADA, C , tracker theory, sensor or signal processing. **Job:** **Software Engineer* **Organization:** **N&SS Business Chief Engineer* **Title:** *Entry Level Software Engineer* **Location:** *Alabama-Huntsville* **Requisition ID:** *1700007960*
          Improving GFDM Symbol Error Rate Performance using “Better than Nyquist” Pulse Shaping Filters   
Fourth generation (4G) cellular systems have been optimized to provide high data rates and reliable coverage to mobile users. New waveforms at the physical layer are needed. Generalized frequency division multiplexing (GFDM) is a candidate modulation for the fifth generation (5G) standard based on multi-branch multicarrier filter bank approach. A main characteristic of GFDM is its low out of band emission, achieved by means of a flexible time-domain pulse shaping of individual subcarriers. In this paper, the influence of the improved “Better than Nyquist” pulse shaping filters on symbol error rate (SER) performance of the GFDM system in the case of zero forcing (ZF) receiver is investigated. We considered their use in GFDM to evaluate the impact on SER performance in case of 16-QAM transmission over an additive white Gaussian noise channel. Moreover, we also considered the concept of the wavelet for better time-frequency localization of the pulse shaping filters by using the Meyer auxiliary function. Numerical results are reported to demonstrate the superior SER performance achieved.
          Method and systems for high-precision pulse-width modulation   
In various embodiments, systems and methods for generating high-precision pulse-width modulation include a delay-locked loop comprising multiple delay units having time-variable delays, control logic for selecting a subset S of the multiple delay units to thereby generate a time-invariant shift amount having a precision finer than that of a system clock and circuitry for applying the shift amount to rising and falling edges of a pulse-width modulation waveform to thereby generate a high-precision pulse-width modulation waveform.
          Communications system including jammer using continuous phase modulation (CPM) and associated methods   
A communications system includes a target receiver having a passband and configured to receive an intended signal within the passband. The communications system also includes a jammer configured to jam the target receiver from receiving the intended signal. The jammer has at least one antenna, a jammer receiver coupled to the at least one antenna, a jammer transmitter coupled to the at least one antenna, and a controller configured to cooperate with the jammer receiver. The controller is configured to detect the intended signal and to generate an interfering signal comprising a continuous phase modulation (CPM) waveform having a constant envelope so that the interfering signal at least partially overlaps the passband of the target receiver.
          Apparatus, system, and method for digital base modulation of power amplifier in polar transmitter   
An amplifier receives an amplitude signal of a polar modulated signal at a base terminal of a transistor and receives a phase modulated carrier signal of the polar modulated signal at the base terminal of the transistor. The amplifier combines the amplitude signal and the phase modulated signal to produce a full complex waveform at a collector terminal of the transistor.
          Radar Firmware Lead - Duotech Services Inc - Franklin, NC   
The candidate will be expected to perform technical activities associated with radar timing and waveforms, signal and data processing techniques, implementation...
From Indeed - Mon, 26 Jun 2017 15:00:29 GMT - View all Franklin, NC jobs
              
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          Driving apparatus   
A driving apparatus comprises a piezoelectric element (12) expanding and contracting in accordance with a driving pulse signal (40, 42), a supporting shaft (14) connected to said piezoelectric element, a movable body (20) frictionally engaged with said supporting shaft and capable of moving along said supporting shaft, and a driving portion (30) applying said driving pulse signal having a voltage value that corresponds to a driving voltage value (VD) to said piezoelectric element in order to cause relative movement of said movable body to said supporting shaft, wherein a driving voltage waveform (50) showing a time-varying of said driving voltage value has a first dropping portion (55) where said driving voltage value sharply drops from a first value (V1) to a second value (V2), a second dropping portion (56) where said driving voltage value slowly drops from said second value (V2) to a third value (V3) compared with said first dropping portion, and a third dropping portion (57) where said driving voltage value sharply drops from said third value (V3) to a standard value (V0) compared with said second dropping portion.
          Blackmagic Design Enhances Video Assist 4K with Software Update   

The new Video Assist firmware adds vector scope, waveform monitor, RBG parade and historgram to monitor/recorder.

Read More


          Chip Hall of Fame: Intersil ICL8038 Waveform Generator   
Intersil’s somewhat cranky chip brought complex sound generation to consumer electronics
          (USA-VA-Virginia Beach) Sonar Technician   
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           My Generic PSF (Portable Sound Format: PSF1, GSF) Ripping Strategy   

Here I introduce my PSF ripping method.

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Introduction

I assume you already know about the following things:

  • What is PSF? - A format for video game music rips. In most cases, a PSF is a compressed game ROM whose non-sound stuff is removed by ripper.
  • "Streamed?" "Sequenced?" What's the difference? etc. - Read PSF Frequently Asked Questions - Neill Corlett's Home Page
  • What is pointer? - For this purpose, I recommend you to learn C.
  • Do I need to learn assembly? - At least you need to know basics. (for example: "What is a register?" "What is a stack?") If you already know one of assemblies, I think you can solve your problems during ripping by pinpoint googling.

Prerequisites

  • Emulator (Debugger) - such as no$psx or no$gba debugger
    • It must have step execution function. (Step Into, Step Over, Run To Return)
    • It definitely should have a function that can change instructions by using assembly.
    • It should change register value. (If not available, use an external tool such as MHS.)
  • IDA Pro - it will help you in reading assembly a lot. See also: IDA Pro - How To Load Game ROM
  • Memory Scanner - such as Memory Hacking Software (MHS) or Cheat Engine.
    • This tool is optional. It is handy when the emulator does not have built-in RAM search function.
    • It can be used to set a memory breakpoint, when the emulator does not have a memory breakpoint feature. (thankfully, nocash debuggers has the feature)

Typical structure of unaltered game

I think a game has routines like the following typically:

register int a0, a1, a2, a3;
register int sp;

void start(void)
{
    // Minimal Initialization
    sp = 0xXXXXXXXX;
    memset(BSS_START, 0, BSS_SIZE);

    main();         // will never return
}

void main(void)
{
    // Initialization Stage
    InitIRQ();      // set interrupt callback(s), an operation like this should exist in upper part of startup code
    a0 = 0xXXXX;
    InitFoo(a0);
    a0 = 0xXXXX;
    a1 = 0xXXXX;
    InitBaa(a0, a1);
    a0 = 0xXXXX;
    InitSound(a0);  // init sound registers
    InitMoo();

    // Main Loop Stage
    main_loop:
        MainFunc1();
        a0 = 0xXXXX;
        a1 = 0xXXXX;
        MainFunc2(a0, a1);
        a0 = 0xXXXX;
        MainFunc3(a0);
        MainFunc4();
        WaitForVSync();
    goto main_loop;

    // never return
}

// Callback for interrupts are registered at initialization stage.
// User callbacks are usually called by BIOS or CPU.
// Those callbacks are used for frequent and synchronous operations,
// so that music playback routine must be called by such a callback, in most cases.
// Some drivers may call the routine from a timer callback, instead of a vsync callback.
void VSyncCallback()
{
    UpdateSound();
    UpdateVideo();
    UpdateBlah();
}

// Start playback. This function is usually called from subroutines in main loop.
// Sound system needs to be initialized beforehand.
// "Load" functions may need to be called beforehand.
void PlayNewSong(int songId, ...)
{
    // initialize score pointer of each tracks, etc.
    ...
}

// About Load Functions
// --------------------
// The music data may need to be loaded from ROM to RAM before the playback,
// if the sound unit cannot read the data directly from ROM for some reasons.
// For example, PlayStation games need to load the music data from CD.
// They also need to load waveforms (PSX ADPCM) to the sound buffer.
// Most GBA games probably do not need it, because the processor can read ROM.
// For such systems, you may also need to find such load functions.

Details depend on the console and game.

Strategy summary

  1. Analysis before ripping
    1. Search score pointers
    2. Search "play new song" function
    3. Analyze loading routines
  2. Ripping
    1. Minimize main loop
    2. Insert driver code (call the song select function)
    3. Minimize initialization
    4. Minimize callback
    5. Code refactoring

Search score pointers

I explained how, in Example Of Sequenced VGM Analysis.

Search "play new song" function

// Start playback. This function is usually called from subroutines in main loop.
// Sound system needs to be initialized beforehand.
// "Load" functions may need to be called beforehand.
void PlayNewSong(int songId, ...)
{
    // initialize score pointer of each tracks, etc.
    ...
}

Score pointers must be initialized when a new song starts playback. So that I always set a write-breakpoint to one of those pointers. (this is done by using MHS, because nocash debuggers cannot do that. In nocash debugger, you can set memory breakpoint by "Define Break/Condition" menu. Syntax for a write-breakpoint is `[address]!!` Read the help for details.)

Let me show the case of PS1 "Hokuto no Ken" as an example.

Set write-breakpoint and find where the score pointer gets changed
  1. Run no$psx
  2. Play the game until just before a song starts playback, then pause the game
  3. Make a savestate (for quick redo, and prevent to change the song data address)

Here I need to set a write-breakpoint to one of the pointers, 0x80079B60.

  1. Open "Debug → Define Break/Condition" from the menu
  2. Enter `[80079B60]!!` (without quotes) and press OK

Now a breakpoint is set. The emulator will hit to the breakpoint immediately, after you unpause the game. In my case, it has stopped at 0x8003C00C. The pointer value gets updated by the instruction here, so I assume we can find the song load function by tracing back.

Note: Do not forget to remove the memory breakpoint before you start tracing back!

Backtrace from the write instruction

Repeat the following steps for 3-5 times:

  1. Select "Run → Run to Sub-return" from the menu (or press F8)
  2. If possible, read the function start address of previously noted instruction, from the one before the current instruction. (If not possible, use IDA Pro instead.)
  3. Write down the instruction address

After that, obtain the function start address of each instruction addresses, by reading the previous instruction or using IDA Pro. Your note will become something like the following.

Sub-return Function Note
0x8003C00C 0x8003BF0C Writes to score pointer
0x8003C1FC 0x8003C060
0x8003C3BC 0x8003C374
0x8003B84C 0x8003B714
0x80011F58 - I guess this is not the playback function because its address is far away from others

I think one of function addresses is the top of playback function. Load a savestate and set a breakpoint to the top-level function (0x8003B714), then resume the game.

The execution will be stopped when a song starts playing. Edit one of the arguments to the function, and unpause the emulation. *1 If the game plays a different song, the function is apparently the song select function. It is what exactly we are searching for.

In my case, the game has played a different song by manipulating r2 register.

In actual research, you may fail and need to try for other arguments and functions. Try patiently, probably you will find the right answer after all (hopefully!).

After find the playback function, try to understand what each arguments mean.

Analyze load function

Games may need to load a music data from somewhere.

  • If it's a PSX game, the game needs to load music data from CD
  • If a music data is compressed or archived, the game needs to unpack it to another RAM area
  • Some games may not have a load function (for example: GBA games, which can access to every ROM addresses directly)

Here we just need to do the same things. Try to know the data location, and use memory breakpoints.

In PS1 Hokuto no Ken, I somehow learned two facts:

  • Music archive seems to be always loaded to 0x800FE000 (I decided to import music archive there by PSFLib)
  • Music archive is unpacked by function 0x80012808

Minimize main loop

Most of functions (or all functions) in the main loop is not necessary for sound playback, since the sound playback is usually done by a callback.

The below is an example of main loop.

    // Main Loop Stage
    main_loop:
        MainFunc1();
        a0 = 0xXXXX;
        a1 = 0xXXXX;
        MainFunc2(a0, a1);
        a0 = 0xXXXX;
        MainFunc3(a0);
        MainFunc4();
        WaitForVSync();
    goto main_loop;

Try removing unwanted codes. Follow the steps:

  1. Play the game until a song starts playing, then pause it
  2. Set a breakpoint at the line like "call MainFunc1"
  3. Run the game and it will stop immediately
  4. Unset the breakpoint and change the instruction to NOP
  5. Unpause the game and see if the music still work (If it works, the function call probably can be removed. If it does not work, the function may be necessary.)
  6. Repeat those steps for every function calls in main loop

In my case, it has become an empty loop:

    // Main Loop Stage
    main_loop:
        //MainFunc1();
        //a0 = 0xXXXX;
        //a1 = 0xXXXX;
        //MainFunc2(a0, a1);
        //a0 = 0xXXXX;
        //MainFunc3(a0);
        //MainFunc4();
        WaitForVSync();   // this call can also be removed
    goto main_loop;

Insert driver code (call the song select function)

You should have small free code block in main loop. Use the block to patch the game to play a song immediately.

    // Main Loop Stage
    //main_loop:
        //MainFunc1();
        //a0 = 0xXXXX;
        //a1 = 0xXXXX;
        //MainFunc2(a0, a1);
        //a0 = 0xXXXX;
        //MainFunc3(a0);
        //MainFunc4();

    // Song Starter Example
    UnpackMusicArchive(MUSIC_ARCHIVE_ADDRESS);  // call loading functions before the playback function, if available
    PlayNewSong(SONG_INDEX);

    main_loop_hacked:
        WaitForVSync();   // this call can also be removed
    goto main_loop_hacked;

Reset & Run the game after inserting the code. Does a song start playing? Can you change the song by editing the arguments? If so, you have almost done your work!

For the next step, you should make a copy of the ROM file, and apply the patch to it. Then, open it instead of unaltered ROM by the emulator.

Minimize initialization

    // Initialization Stage
    InitIRQ();      // set interrupt callback(s), an operation like this should exist in upper part of startup code
    a0 = 0xXXXX;
    InitFoo(a0);
    a0 = 0xXXXX;
    a1 = 0xXXXX;
    InitBaa(a0, a1);
    a0 = 0xXXXX;
    InitSound(a0);  // init sound registers
    InitMoo();

Remove unnecessary calls like we have done in main loop:

  1. Change the instruction like "call InitFoo" to NOP
  2. Reset & Run the game and see if the music still work (If it does not work, reload the ROM, and try removing unnecessary calls in the subroutine.)
  3. Repeat those steps for every function calls

For example, the final result may become like the following:

    // Initialization Stage
    InitIRQ();      // set interrupt callback(s), an operation like this should exist in upper part of startup code
    a0 = 0xXXXX;
    InitFoo(a0);
    //a0 = 0xXXXX;
    //a1 = 0xXXXX;
    //InitBaa(a0, a1);
    a0 = 0xXXXX;
    InitSound(a0);  // init sound registers
    //InitMoo();
    ...

void InitFoo(int a0)
{
    InitSoundRegion();
    //InitJoypad();
}

Minimize callback

Do the same thing to callback function.

void VSyncCallback()
{
    UpdateSound();
    //UpdateVideo();
    //UpdateBlah();
}

Code refactoring

Probably, patched main function is filled by a lot of NOPs. If you think that is not beautiful, you may want to create a new main routine.

Note: For PlayStation games, you can write the new driver code in C, thanks of PSF-o-Cycle.

// commented-out instructions are filled by NOP

void start(void)
{
    // Minimal Initialization
    sp = 0xXXXXXXXX;
    memset(BSS_START, 0, BSS_SIZE);

    main_PSF();     // will never return
}

void main(void)     // no longer used
{
    ...
}

void main_PSF(void) // inserted to an unused code block
{
    // Initialization Stage
    InitIRQ();      // set interrupt callback(s), an operation like this should exist in upper part of startup code
    a0 = 0xXXXX;
    InitFoo(a0);
    a0 = 0xXXXX;
    InitSound(a0);  // init sound registers

    // Song Starter
    UnpackMusicArchive(MUSIC_ARCHIVE_ADDRESS);
    PlayNewSong(SONG_INDEX);

    // Main Loop Stage
    main_loop:
        WaitForVSync();
    goto main_loop;
}

void InitFoo(int a0)
{
    InitSoundRegion();
    //InitJoypad();
}

// Callback for interrupts are registered at initialization stage.
// User callbacks are usually called by BIOS or CPU.
// Those callbacks are used for frequent and synchronous operations,
// so that music playback routine must be called by such a callback, in most cases.
// Some drivers may call the routine from a timer callback, instead of a vsync callback.
void VSyncCallback()
{
    UpdateSound();
    //UpdateVideo();
    //UpdateBlah();
}

Finalize

You need:

Notes

Assembly

General

  • Depending on architecture, there are some pseudo instructions (macro) like the following (MIPS). IDA Pro will recover those pseudo instructions, however, many other disassemblers do not. (PSFLab and nocash debugger do not, at least)
li $t0, 0x1234ABCD
  ↓
lui $t0, 0x1234
ori $t0, $t0, 0xABCD

MIPS

  • The immediate value of addi/addiu instruction is always signed.
addiu $t1, $t0, 0xFFFF
  ↓ means
addiu $t1, $t0, -1
  • Jump and branch instructions have a "delay slot". This means that the instruction after the jump or branch instruction is executed before the jump or branch is executed.
addiu $a0, $zero, 1
jal $8001A000  ; a0 = 2
addiu $a0, $zero, 2
How to know vsync callback address
  • PS1: Search xrefs to VSyncCallback by IDA Pro (It must be identified by PsyQ sigunature).
  • GBA: Interrupt handler function address must be written in 0x03007FFC. The handler function must read 0x04000202 and see what interrupt has raised. See GBATEK for details.
  • General: Repeat "Run to Sub-return" from subfunction of vsync callback
How to wait for vsync
  • PS1: VSync runtime function (It must be identified by PsyQ sigunature).
  • GBA: SWI 05h (IDA Pro will display it as "SVC 5"), VBlankIntrWait BIOS function, however, this BIOS function will never return when the callback does not update 3007FF8 (see GBATEK for details). If the game does not use any other interrupts, you can also use SWI 02h (Halt), it does not require a flag update.

Graveyard

Old method. It is not necessary in most cases, but it might be required for some limited cases.

Removed Section: Set write-breakpoint by MHS and get program counter (PC) value

This section is removed since nocash debugger has a built-in memory breakpoint feature.

First of all, run emulator and MHS.

  1. Run no$psx.
  2. Run MHS and open the no$psx process.
  3. Play the game until just before a song starts playback, then pause the game.
  4. Make a savestate, as usual.

I need to set a write-breakpoint to one of those pointers, PSX-RAM:$79B60. I assume it is already in the main address list. (See Example Of Sequenced VGM Analysis!)

Right-click on the address and click "Find What Writes This Address".

It attaches debugger to the emulator and opens Disassembler and Helper windows. Then delete the added address from Helper window.

Activate Disassembler window, then right-click on a random instruction and click "Breakpoints → Add Software Write Breakpoint Here".

An address must be added to Breakpoints tab in Helper window. Double-click the item to edit it.

Edit the address to watch the PC address of score pointer, then click OK.

Finally a breakpoint is set! Back to the emulator and continue the game. Probably the emulator will run very slowly, but please wait until something will happen.

Hopefully, the emulator will stop running, and MHS's Disassembler will popup and highlight the current execution address.

Now I need to read the program counter (PC), however, the emulator is freezing because of the breakpoint. Therefore, I have to read it from MHS. How? The answer is written in Memory Addresses Of Emulators. Since NO$PSX always has the current execution address in ESI register, I need to view the value through Registers tab in Helper window.

Of course it's PC address, so convert it to game address.

Finally, I get the code address 0x3C92C (0x8003C92C). We need to resume the emulator before using the address though.

  1. Remove your breakpoint from Breakpoints tab
  2. Dettach debugger by Disassembler window
  3. Close Disassembler window

Correction: In the screenshot above, I tried to search an instruction that writes to track 1. However, I needed to search track 3 in fact, because track 1 is used by SFX. I got 0x3C010 (0x8003C010) after the correct process.

*1:no$psx can change the register value. Right-click the target register column and select "Change Value" menu item.


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