14.36
rosyid
...
Senin, 30 Mei 2011
Rabu, 11 Mei 2011
Elisra Presents New Data Link Technology Developments for UAVs at This Year’s AUVSI
world leader in EW and wireless communication technologies, unveils its newly developed UAV data link systems at AUVSI’s Unmanned Systems North America 2009 Conference and Exhibition in Washington DC, August 11-13. The company’s latest C-band Starlink and ADLS-2 solutions will be showcased, underscoring Elisra’s technological prowess in the UAV data link field.
Elisra’s C-band Starlink digital data link was designed for integration on tactical UAS and is now operational worldwide. The system delivers secure UAS-borne payload video images in real time to field commanders, dismounted troops and Special Operations Forces, providing them with critical...
The iPhone puts healthcare in your hands
Pharmaceutical companies have traditionally targeted their communications at doctors, pharmacists and health care professionals since direct communication with patients is heavily regulated and restricted (particularly outside the U.S.). However, technological developments have triggered a new era in healthcare; the era of rising patient sovereignty. More and more patients now compare experiences in web forums, google information on treatments and arrive at their surgery sufficiently well informed to debate their doctor’s advice.
Web-based Personal Health Records (PHRs) created an initial flurry of excitement in the industry, but...
Rabu, 04 Mei 2011
Energy and Transport
Meanwhile, humans were learning to harness other forms of energy. The earliest known use of wind power is the sailboat.[40] The earliest record of a ship under sail is shown on an Egyptian pot dating back to 3200 BC.[41] From prehistoric times, Egyptians probably used the power of the Nile annual floods to irrigate their lands, gradually learning to regulate much of it through purposely built irrigation channels and 'catch' basins. Similarly, the early peoples of Mesopotamia, the Sumerians, learned to use the Tigris and Euphrates rivers for much the same purposes. But more extensive use of wind and water (and even human) power required another...
Stone tools
Dalja unaprijeđenja dovela su do razvoja peći, koje su omogućile topljenje i kovanje metala (koji su se javljali u prirodi u ralativno čistoj formi). Zlato, bakar, srebro i olovo su bili neki od tih metala. Prednosti bakarnog nad kamenim, koštanim i drvenim alatima su bile učite ranim ljudima, te se bakar počeo koristiti od ranog neolitika (oko 8000. godine pne.). Bakar se ne jablja u prirodi u velikim količinama, ali bakarnih ruda ima mnogo, iz kojih se, zagrijavanjem i topljenjem, dobija metal. Na kraju, rad sa metalima doveo je do pronalaska legura, kao što su bronza i mesing (oko 4000 . godine pne.). Prva upotreba željeznih legura, kao što...
Stone tools
Human ancestors have been using stone and other tools since long before the emergence of Homo sapiens approximately 200,000 years ago.[20] The earliest methods of stone tool making, known as the Oldowan "industry", date back to at least 2.3 million years ago,[21] with the earliest direct evidence of tool usage found in Ethiopia within the Great Rift Valley, dating back to 2.5 million years ago.[22] This era of stone tool use is called the Paleolithic, or "Old stone age", and spans all of human history up to the development of agriculture approximately 12,000 years ago.
To make a stone tool, a "core" of hard stone with specific flaking properties...
Definition and usage
The use of the term technology has changed significantly over the last 200 years. Before the 20th century, the term was uncommon in English, and usually referred to the description or study of the useful arts.[2] The term was often connected to technical education, as in the Massachusetts Institute of Technology (chartered in 1861).[3] "Technology" rose to prominence in the 20th century in connection with the second industrial revolution. The meanings of technology changed in the early 20th century when American social scientists, beginning with Thorstein Veblen, translated ideas from the German concept of Technik into "technology." In...
Internet
The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies. The Internet carries a vast range of information resources and services, such as the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support electronic mail.
Most traditional communications media including...
Digital Servo Drives
Our xDrive all-digital brushless servo drives are standalone, housed units that are ideal mates to power our brushless torque and servo motors.
xDrive
Model Power Supply Cont. Current
(A Pk / A RMS) Peak Current
(A Pk / A RMS) Command Digital I/O Feedback
DA-XDA-230 AC: 230 VAC,
50/60 Hz,
1- or 3-phase 4 / 2.8
8 / 5.6
16 / 11.2 8 / 5.6
16 / 11.2
32 / 22.4 (2) ±10VDC,
12-bit 9 (5 hi speed) IN,
5 (3 hi speed) OUT Hall, encoder,
serial encoder,
resolve...
llied Motion offers three series of power differentiating transaxles, the DDA, TAA and the TAB series. The DDA series is a dual-drive unit that uses two opposed parallel-shaft gearmotors to effect the capability of a zero turn radius transaxle.
The TAA series is our standard-duty transaxle with up to 3/8 HP output shaft power, and the TAB series is our heavy-duty transaxle with over 1 HP output shaft power.
In addition to our standard transaxle offering shown here, Allied Motion can design custom transaxles to fit the requirements of your specific application.
Standard and Heavy-Duty Transaxles
DDA Transaxle TAA Transaxle...
Frameless Brushless Torque Motors
Frameless sizes range from 17.3 mm (0.68") through 792 mm (31.2"). In addition to this standard range, custom sizes are also available to suit specific requirements.
Housed versions of most of our frameless motor models are available up through the Megaflux MF310 with a housing diameter of 310 mm (12.2").
HT High TorqueMegaflux
Series Continuous Stall Torque Winding Voltage Stator Diameter
HT 0.007 - 8.41 Nm
(1.0 - 1192 oz-in) 24 / 100 / 145 VDC 19.3 - 239.2 mm
(0.78 - 9.42 in)
Megaflux
Frameless 3.5 - 2020 Nm
(2.5 - 1490 lb-ft) 48 / 150 / 300 VDC 170 - 792 mm
(6.69 -...
Small Precision Motors
Our small-frame motors have been successfully applied to a wide range of applications, particularly in medical, pump, and scanning equipment. See our Market Solutions section for application solutions using Allied Motion small-frame precision motors.
Available standard models are summarized below, but keep in mind that Allied Motion specializes in custom-design motion control products to fit specific application requirements.
Miniature Brushless DC Motors
PerformeX Series
Series Dia. (OD) Cont. Torque Stall Torque Voltage Speed (NL)
PerformeX Size 5 0.5"
(12.7 mm) 0.95 oz-in
(6.71 mNm)...
Servo Motors
The Quantum (QB) series is offered in both frameless and standard NEMA housed versions. The frameless models are designed for direct integration with the driven shaft or gearbox. The housed NEMA models can be equipped with an encoder or resolver for feedback. Custom versions of the Quantum series to exactly match application requirements are easily developed from our standard platform designs.
Quantum Frameless Brushless Servo Motors
QB Frameless Series
Series Continuous Stall Torque Winding Voltage Stator Diameter
Quantum
Frameless
0.08 - 14.1 Nm
(11.5 - 1997 oz-in)...
Gearmotors
Right-angle, parallel, and inline (planetary) shaft versions
Choice of BLDC or PMDC motor
Continuous output power to 1/2 HP
Cast aluminum gearboxes and precision gearing for durability and long life
Custom versions available to suit specific application requirement...
Brushless DC Motors
Economical brushless DC motors with or without integrated drive electronics
Designed for durability in commercial and industrial speed and torque control applications
Hall effect sensor commutation
Drive electronics protection, including reverse voltage
Thermal protection
» BLDC Motor Deta...
ALIA DP D series-Diaphragm seal
ALIADP D series is a diaphragm seal product combining
APT8000 / ADP9000 / ADP9000L transmitter, which designed for the high-viscosity/ granular/ high-temp./ high-corrosivity situation.
D series diaphragm seal assembles Alia pressure/DP transmitter to form direct-mount / capillary-connections style.
FEATURES
The maximum temperature comes up to 280 deg.C
Multiple connection modes- Flange style / Tri-Clamp style
Multiple diaphragms/alternative connection material
Vegetable oil can be used to fill fluid for food industry
Extreme hot and cold temperature
Stainless Steel with PPC coating capillary
IDF Tri-Clamp or union screw connection for...
Linear Series - LIN-100-TS Blow molding machine
This series was specially designed to target customers in need of producing low and high volume container in large quantities. With the latest technological developments each model reaches high speed dry cycle times that enable to meet stringent production requirements.Equipped with world wide recognized electrical, hydraulic and pneumatic components, energy consumption levels are certainly minimized to achieve strict efficiency targets thus contributing to reduce the negative impact on the environment.This series has been proven to perform at the same level, at times higher, when compared to the top name brands or European manufacturers....
Why Obstinate Humans Find It Hard To Believe Science
Not even those of us who are scientifically trained actually do objective science consistently well. Like all other humans, we are predisposed, with biased, emotionally prejudiced human minds, to first see what we want or expect to see—a dilemma first illustrated by Plato as “The Allegory of the Cave.”
In one of the few things Plato got right, he showed how each of us allows our subjective will to overlay and mask anything inconvenient about the objective world…
cave
Now Chris Mooney, author of The Republican War on Science, explains how this age-old human flaw is being analyzed in scientific detail, by researchers who reveal it to be dismayingly...
Our Worst Frailty: An Electro Magnetic “Hit
The Electric Infrastructure Security (EIS) Council agitates for better infrastructure protection against electromagnetic threats. EMPACT America is a bipartisan, non-profit NGO for citizens concerned about protecting the American people from a nuclear or natural electromagnetic pulse (EMP) catastrophe.
To be clear, we face other dangers of a chronic nature, for example the need to develop sustainable energy to escape dependence upon foreign oil-masters and to possibly save the planet. Educating a smarter generation and rescuing our decaying infrastructure also matter a great deal, over the longer time scale.
But acute-impact threats fall...
