Practical Nanotube Electronics

Carbon nanotubes are a promising material for making display control circuits because they’re more efficient than silicon and can be arrayed on flexible surfaces. Until recently, though, making nanotubes into transistors has been a painstaking process. Now researchers at the University of Southern California have demonstrated large, functional arrays of transistors made using simple methods from batches of carbon nanotubes that are relatively impure.

Nanotube array: This photo shows a three-inch silicon wafer covered with an array of carbon-nanotube transistors. Though these transistors were made using simple processes at room temperature, their performance is good enough to drive display pixels.
Credit: ACS/Nano Letters

The pixels in a computer or television screen, whether it’s an LCD or plasma, are each controlled by several transistors. In today’s devices, these transistors are made from silicon. Arrays of these transistors need to be made at high temperatures and in a vacuum, so they’re very expensive, says Chongwu Zhou, an associate professor of electrical engineering at USC and researcher on the nanotube project.

Transistors have also been made from carbon nanotubes, but that, too, presents challenges. “Many people use one nanotube to make a very small, high-performance transistor” for computer chips, says Zhou. But that one-to-one ratio won’t work for displays, in which a large surface must be covered in transistors. “If we use one nanotube for one transistor, the yield will never be high enough” to work for large-scale manufacturing of big screens, he says. Zhou believes his approach will solve this problem by making larger transistors from mats of nanotubes.

The USC researchers make large arrays of carbon nanotube transistors using solution-processing techniques at room temperature. They start by placing a silicon wafer in a chemical bath to coat its surface with a nanotube-attracting chemical, then rinse off the residue. The treated wafer is then immersed in a solution of semiconducting carbon nanotubes, which are attracted to its surface. The wafer, now coated with a carpet of nanotubes, is rinsed clean again. To make transistors from this tangled mess, the researchers put down metal electrodes at selected locations. The electrodes define where each transistor is and carry electrons into and out of the nanotubes that lie between them. Areas of silicon underlying each device act as the transistors’ gates. So far, they’ve built a prototype device on a four-inch silicon wafer and used it to control a simple organic light-emitting diode display. This work is described online in the journal Nano Letters.

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Cloud whitening

cloud whitening

technology used by scientist 10 years a head

How it works: The idea here is to use satellite-guided sailing ships to crisscross the oceans, constantly spewing a fine stream of sea mist into the clouds.

Turns out particles, in this case the salt in the sea mist, will cause clouds to become denser, reflecting more sunlight back into space and keeping the planet cooler.

The novel ship design actually dates back nearly a century, when the German inventor Anton Flettner built one that crossed the Atlantic. The mist towers are hollow and rotate in the wind, acting as sails. It can cross the Atlantic faster than a conventional sail boat and do so without a crew. The power for the mist pumps is generated by the turbine under the hull.

Each ship would cost $2 or $3 million, making the entire program cost just a few billion dollars.

About 1500 ships would be needed to maintain current temperatures, according to John Latham, a scientist at the National Center for Atmospheric Research.

Beyond the machine: Like most scientists studying geoengineering, Latham said it is not a substitute for reducing greenhouse gas emissions as it does not address other problems associated with too much carbon dioxide.

He also said the idea, like most other geoengineering ideas, needs much more study before it’s deployed on a wide scale, as any other potential side effects are still unknown.

Source :  Steve Hargreaves, CNNMoney.com staff writer

ATI Radeon HD 4650/70: Top Value for Bottom Dollar

All right, so the AMD ATI Radeon HD 5000-series graphics generation has arrived and quickly swept the field in performance tests. If you want the whole story backed up by benchmark tests and deeply technical explanation, see our recent coverage here (http://www.tomshardware.com/reviews/radeon-hd-5870,2422.html). We love a great come-back story as much as anybody else, but the fact remains that a lot of buyers can’t spring $350+ for the latest dream card, much less two of them to run in a dual-card configuration.

AMD ATI Radeon

In reality, there are two kinds of graphics enthusiasts: those who will buy the latest and greatest no matter what and those who stand ready to pounce on yesterday’s must-have technology at freshly (and deeply) discounted prices. There’s nothing like a little recession to help boost the ranks of the latter group, so we thought we’d turn the spotlight just a bit and revisit AMD’s former mainstream stars, the 4670 and 4650. Why? Because while cards based on the new HD 5870 may be selling for $379, HD 4650 and HD 4670 cards start at about $55 and $67, respectively.

If you feel like getting 80% of the ATI bang for only 20% of the flagship’s bucks, then read on. We think there’s still a very persuasive case to be made for going a little retro.

Best Gaming CPUs For The Money: November ’09

If you don’t have the time to research the benchmarks, or if you don’t feel confident enough in your ability to pick the right processor for your next gaming machine, fear not. We at Tom’s Hardware have come to your aid with a simple list of the best gaming CPUs offered for the money.

November Updates

AMD has introduced some new CPUs since our last installment; most notably, the Athlon II X3 family. The new Athlon II X3 435 combines three CPU cores, a fast 2.9 GHz clock rate, and a low $90 price tag. Since today’s games tend to utilize no more than three CPU cores on average, the Athlon II X3 435 is a fantastic gaming processor for the enthusiast on a budget. Our Athlon II X3 435 sample overclocked to 3.7 GHz fairly easily, so there’s a lot to like about this low-cost processor. In addition to the X3 435, AMD has also created an Athlon II X3 425 with a 2.8 GHz clock speed, available for about $80.

There are a number of other new AMD CPUs available, mostly a host of low-power Athlon II X2, X3, and X4 variants. These are great for energy-efficient applications, but they don’t offer much to gamers looking for maximum performance per dollar.

Aside from those introductions there isn’t much to report on the CPU front, with Intel dominating the $200+ market with its Core i5 and Core i7, and AMD dominating the sub-$200 market with the Phenom II X4 955 and new Athlon II.

Speaking of the Phenom II X4 955, the street price has dropped to $175, making it a great deal for a premium multiplier-unlocked processor.  The Core i5 is faster, but the $25 price difference might be enough for some tweakers to opt for the unlocked Phenom II, especially since the P55 platform tends to be a bit more expensive than AMD options at this time. Either way, there are some fantastic products out there–let’s look at the recommendations.

Some Notes About Our Recommendations

This list is for gamers who want to get the most for their money. If you don’t play games, then the CPUs on this list may not be suitable for your particular needs.

The criteria to get on this list are strictly price/performance. We acknowledge that there are other factors that come into play, such as platform price or CPU overclockability, but we’re not going to complicate things by factoring in motherboard costs. We may add honorable mentions for outstanding products in the future, though. For now, our recommendations are based on stock clock speeds and performance at that price.

Cost and availability change on a daily basis. We can’t offer up-to-the-minute accurate pricing information in the text, but we can list some good chips that you probably won’t regret buying at the price ranges we suggest (and our PriceGrabber-based engine will help track down some of the best prices for you).

The list is based on some of the best U.S. prices from online retailers. In other countries or at retail stores, your mileage will most certainly vary. Of course, these are retail CPU prices while we do not list used or OEM CPUs.

Source

Intel Announces Increased Momentum for Personalized Care Management at Home with the Intel® Health Guide

SANTA CLARA, Calif., Nov. 23, 2009 – The Intel® Health Guide, Intel Corporation’s next-generation personal health system, continues to win in the personal health marketplace with the addition of a new government value-added reseller (VAR) and several new customers.

GTSI Corp., an enterprise technology solutions and services provider, is the latest addition to the list of Intel Health Guide authorized resellers. In the United States, Intel has added new customers including the Veterans Affairs (VA) Rural Resource Center Western Region, Memorial Hospital and Health System in South Bend, Ind.; Nightingale Home Healthcare of Indiana, Inc.; and all seven independently owned offices of the Home Care Group. This range of customers – from government to hospital and home health organizations – reflects the Intel Health Guide’s versatility for a variety of clinical workflows and users including chronically ill patients, clinicians and family caregivers.

The Intel Health Guide is an FDA-cleared remote patient monitoring system designed to help address the challenges of chronic conditions for patients, their family caregivers and the health care professionals responsible for their care. Health care professionals are able to customize care, gather timely information about the status of their patients, and collect and prioritize data. The Intel Health Guide offers patients an intuitive way to have timely interaction with their care providers and receive relevant self-care education, helping to minimize time-consuming and costly office visits. The system’s customizable educational content capability also makes it an ideal vehicle for delivering information to support family caregivers. Patients and their health care teams can connect via multiple connectivity options including cable/DSL broadband, cellular wireless and residential phone service.

“We believe that shifting non-urgent care from the hospital to the home through technologies such as the Intel Health Guide is central to achieving a more personalized and cost-effective health care system,” said Mariah Scott, director of sales and marketing for the Intel Digital Health Group. “Working with these organizations allows us to target our innovations across all home health settings and drive the most efficient care management available.”

For GTSI, a provider of enterprise IT solutions and services that streamline technology lifecycle management, the Intel Health Guide is an ideal addition to its current product portfolio. After 26 years of delivering health care solutions to the FDA, VA and hospitals across the country, GTSI’s reselling of the Intel Health Guide will extend its reach into private households, ensuring that health care organizations are equipped to manage chronic diseases in the home in a cost-efficient manner.

“By delivering the Intel Health Guide, GTSI will enable improved patient care and help address the challenges of a worldwide chronic disease epidemic,” said GTSI CEO Jim Leto. “Our array of services around the Intel Health Guide will help health care providers integrate the technology to enhance the patient experience and allow for truly personalized care.”

The Intel Health Guide’s key differentiating features, such as video conferencing, customizable care protocols and educational multimedia content, have also enabled a range of new customers to deploy the system. Three new customers – Memorial Hospital and Health System in South Bend, Nightingale Home Healthcare of Indiana and the seven independently owned offices of the Home Care Group – will deploy the Intel Health Guide to chronically ill patients in need of more personalized care from the comfort of their own homes. At Memorial, the Intel Health Guide will be piloted in high-risk obstetrics patients with gestational diabetes and preeclampsia who have been discharged from the hospital setting. Ongoing clinician monitoring of these patients’ vital signs and communicating with them via video conferencing is intended to catch potential health crises in advance and also prevent unnecessary re-hospitalizations.

Nightingale Home Healthcare of Indiana, which currently manages the largest number of patients monitored under a telemedicine program in Indiana and the Midwest, will use the Intel Health Guide to monitor patients with heart disease, renal disease, metabolic syndrome and orthopedic disabilities. Its goal in deploying the Intel Health Guide is to put the patient first and ensure the highest quality of care, which they expect will lead to reduced costs and fewer re-hospitalizations.

At the Home Care Group – which includes seven independently owned offices in Florida, Illinois, Indiana and Michigan – nurses will use the Intel Health Guide to monitor patients with diabetes, congestive heart failure and chronic obstructive pulmonary disease to ensure that they can live independently in the comfort of their homes for as long as possible.

Informed by over a decade of Intel’s ethnographic research, the Intel Health Guide is designed with the needs of the elder population in mind and is used by health care professionals to manage their patients at home. It is not currently available for general consumer purchase. Intel has staffed a team of clinical experts to provide a range of professional services to health care organizations, allowing them to successfully integrate the personal health system into their current disease management programs and models of care.

For information on how to purchase this product, visit www.intel.com/healthcare/ps/healthguide/wtb.htm. For more information on the Intel Health Guide, visit www.intel.com/healthcare/telehealth. To learn more about Intel in health care, go to www.intel.com/healthcare.

Source

Menyembunyikan Halaman Admin Joomla!

aku ada karena aku berpikir

“..aku ada karena aku berpikir dan diadakan..”

Artikel ini gw buat, soalnya ada permintaan dari Jonas, kalo ibarat MUI akan ada Fatwa Jika ada pertanyaan dari umat..he..he..he..Joomla! adalah salah satu CMS yang memiliki hierarki pemrograman yang terbilang rapi dan kreatif. Maklum aja konon pengembangnya adalah pendekar2 web programming yang mumpuni. Langsung aja yah, ini ada beberapa dokumentasi pada saat gw ngoprek halaman admin dari Joomla! :

——————————–
: 3 juni 2009 1.20 wib :
——————————–
Penemuan baru, ternyata halaman administrator Joomla dapat disembunyikan hanya dengan sedikit trik dan sejumput script, perhatikan langkah-langkah berikut :


1. Ubah file ‘Host’ di dalam folder C:\WINDOWS\system32\drivers\etc. Kenapa kita melakukan ini? karena sistem keamanan ini nantinya menggunakan script PHP yaitu $_SERVER[“REMOTE_ADDR”] untuk mendapatkan IP local. Ip ini nantinya berguna sebagai kunci utama untuk memasuki halaman administrator.
2. Pastikan alamat IP bukan alamat loopback atau 127.0.0.1 akan tetapi alamat jaringan ex:192.168.1.8, caranya yaitu dengan mengubah file Host seperti tersebut diatas , ubah isinya menjadi

127.0.0.1       localhost
192.168.1.8     myhost   #bisa nama apa aja,ex : yourhost,kanghost,ngohost dll

Edit file index yang ada didalam folder administrator, ex :

$a = $_SERVER['REMOTE_ADDR']; // mengambil alamat ip lokal
if ($a!=='192.168.1.8'){       // statement if, jika IP bukan 192.168.1.8 maka lempar ke hal err.php
 if (!empty($_SERVER['HTTPS']) && ('on' == $_SERVER['HTTPS'])) {
 $uri = 'https://';
 } else {
 $uri = 'http://';
 }
 $uri .= $_SERVER['HTTP_HOST'];
 header('Location: '.$uri.'/sakukuv2/err.php');  // lempar ke halaman dummy
 exit;
 } else
 if ($a=='192.168.1.8')// jika IP adalah 192.168.1.8 maka masuk ke halaman index.php
 {
 define( '_JEXEC', 1 );
define('JPATH_BASE', dirname(__FILE__) );
define('DS', DIRECTORY_SEPARATOR);
require_once( JPATH_BASE .DS.'includes'.DS.'defines.php' );
require_once( JPATH_BASE .DS.'includes'.DS.'framework.php' );
 require_once( JPATH_BASE .DS.'includes'.DS.'helper.php' );
 require_once( JPATH_BASE .DS.'includes'.DS.'toolbar.php' );

catatan :
– Kode diatas merupakan kode dari joomla! versi 1.5.xx
– Kode diatas merupakan alternatif pengalihan halaman login admin ke halaman lainnya, indikator atau variabel yang dibutuhkan adalah alamat IP Lokal akan tetapi bukan alamat loopback (127.0.0.1).

Semoga bermanfaat, kalo ada pertanyaan langsung lempar aja…oke..!! ^^

“ANAK MUDA INDONESIA: JANGAN BUGIL DI DEPAN KAMERA!”

Monyet Smua Lo
Monyet Smua Lo

Disinyalir terdapat 500 lebih cuplikan film porno yang menggambarkan hubungan sex orang-orang Indonesia yang dibuat dengan menggunakan Handphone dan Video Kamera. 90% adegan cuplikan film porno dilakukan oleh anak muda SMA dan Mahasiswa. 8%nya berasal dari rekaman prostitusi, para pejabat negara dan pemerintah (DPR dan Pegawai Negeri). 2%nya adalah cuplikan kamera pengintai yang mengambil gambar para wanita-wanita muda yang sedang bugil tanpa sadar di toilet ataupun di kamar hotel.

Perkembangan teknologi kamera ponsel ternyata berefek buruk. 500 lebih cuplikan film porno dibuat para pelakunya atas dasar senang-senang, tidak sengaja dan sebagian dijadikan alat kejahatan (rekaman perkosaan, penistaan, pelecehan). Hal ini menjadi fenomena gunung es. Jangan-jangan, jumlah cuplikan film porno yang dibuat anak muda Indonesia telah mencapai ribuan klip? Jangan-jangan, anak muda kita tidak sadar bahaya yang mengancam, yang semula hanya iseng dan main-main, berubah menjadi mimpi buruk yang kelak akan menghancurkan masa depan mereka? Tentunya tidak saja dengan menggunakan khotbah dan himbauan yang tidak mempan masuk ke telinga anak muda.

Jalan alternatif dan ampuh untuk menghentikan atau mengurangi peredaran dan pembuatan film porno amatir buatan anak muda Indonesia, sebagai permulaan adalah dengan cara melakukan janji bersama, sumpah bersama untuk TIDAK BUGIL DI DEPAN KAMERA! Maka , bila Anda mempunyai anak, teman atau Anda sendiri yang senang bereksperimen dengan kamera (ponsel kamera, webcam maupun kamera genggan/handycam) mari bersama mengucapkan janji:
DEMI MASA DEPAN KITA DAN INDONESIA YANG LEBIH BAIK KAMI BERJANJI TIDAK AKAN BUGIL DI DEPAN KAMERA!

(Janji ini telah dimulai sebagai sebuah gerakan pada bulan Januari 2007, di sebuah acara diskusi bersama mahasiswa FISIKOM UPN Jogjakarta. Embrio gerakan ini berusaha menyebarkan pesan untuk tidak terjebak dalam arus pornografi). Ajak teman, saudara, anak, ayah, ibu dan siapa saja untuk mengucapkan janji di atas. Stop penyebaran dan pembuatan cuplikan film porno Indonesia. Selamatkan Generasi kita. Selamatkan Anak Muda Indonesia!

Ingat : Jangan Dekati Zina…! Itu termasuk Dosa besar. Hukumannya keras ! Di dunia & akhirat.

Kalo anda sudah menikah dan berzina , itu sama artinya menjadi “mayat hidup” karena hukuman syari utk mereka adalah : dirajam (dipendam 1/2 badan, lalu dilempari batu hingga mati). Kalo anda belum menikah dan berzina, hukuman syari utk mereka adalah : cambuk badan sebanyak 100 x. Berposelah yg sopan dan rapi. Tutuplah aurat anda. Jangan biarkan siapapun mengabadikan kehidupan pribadi anda & keluarga tanpa ijin lalu mengupload diinternet.

sumber : Alhiko.blogspot.com