2012年2月2日星期四

Color-quality standards bodies need to consider the broad user base

Amazingly, after nearly half a century, the lighting community is still using color-rendering index (CRI) as a measure of how accurately colors appear under a light source. CRI usage continues despite broadly recognized flaws. Moreover, there are clearly better alternatives such as the color-quality scale (CQS) developed within the US-based National Institute of Standards and Technology (NIST).

Unfortunately, the use of CRI appears certain to continue for the near future as the International Commission on Illumination (CIE) technical committee (TC) 1-69 has failed to endorse CQS, or an alternative, preferring to disagree rather than deliver a tool that would be truly valuable to the broadest segment of the lighting industry.

The TC 1-69 committee had apparently come close to endorsing a dual standard last summer, according to chairperson Wendy Davis. The committee couldn't agree on a single metric, with some preferring the relative simplicity of the math that underlies CQS, and others wanting a far more precise measure of color rendering.

The committee had tentatively agreed to recommend two different metrics: CQS, and a more complex metric called nCRI that was under development at the University of Leeds, UK. Presumably, the broad lighting segment would have used CQS, while nCRI would have served in more specialized applications. Davis said nCRI would "very accurately quantify how different objects appear under the test lamp relative to a reference illuminant."

Unfortunately, according to Davis, the CIE had adopted a new Code of Procedure that required unanimous agreement within a committee before it could publish a technical report. And when the dual-metric recommendation was circulated to the full committee, a dissenting minority stopped the process.

Apparently the politics in the committee have worsened. Davis doesn't expect movement in the short term. She said the final version of the nCRI spec has just been distributed to the committee this past December.

Davis has since moved on from NIST to take a professorship at the University of Sydney, but that hasn't impacted her work on color standards. Last year at Strategies in Light, Davis said that if the CIE committee didn't agree on a new metric, then she would pursue a CQS standard elsewhere.

Davis said recently, "If the CIE fails, I still plan to pursue standardization of the CQS in another organization, most likely in the US." She also said that an Illumination Engineering Society (IES) color committee was contemplating the issue, although she doesn't expect swift movement, in part because the committee is relatively new.

Now in terms of full disclosure, I'm not a color expert nor did I sit in on the TC 1-69 meetings. But I do have broad experience watching standards bodies debate while an industry anxiously awaits their work. I know Davis has a vested interest in CQS given that she helped develop it. But I haven't heard anyone argue that CQS would not be a significant upgrade from CRI. The committee members should have voted with the best interests of the industry in mind rather than their special interests.

2012年2月1日星期三

The Dream Share Project: Your Dream Can Come True

When it comes to following your dreams, where should you start? Recent college graduates Alexis Irvin and Chip Hiden aimed to answer that question when they traveled cross-country to film "The Dream Share Project."

The Dream Share Project in its entirety, which was sponsored by the Academic & Career Advising Center and Lancer Productions on Jan. 30, is a documentary and accompanying workshop targeted towards college students who hope to take a different path to finding their dreams. Irvin and Hiden stopped by Longwood during their extensive university tour to share their creation with students.

Both Irvin and Hiden began working unsatisfactory office jobs after they graduated from college and soon realized they were miserable. After a year of saving up enough money to travel around the United States, the dreamers quit their jobs and set off to film a documentary about Americans who pursued their dreams to find inspiration.

"You can only sit in traffic and look at fluorescent lights for so long before you're like, ‘There's got to be something else worth exploring in this world,'" said Hiden. He and Irvin interviewed everyone from a past Project Runway contestant to a filmmaker to a female NASCAR driver about how their passion led to their dreams becoming reality. They even talked to career counselors and life coaches to gain practical advice and insightful wisdom.

But, like many people who chase after their dreams, Irvin and Hiden were discouraged at times. "There were moments of doubt along the way," admitted Hiden. They resorted to camping out in tents to save money, ran low on cash despite their saving efforts and were unsure if their film would be viewable due to the simplicity of their video camera. But they completed their film, worked enjoyable part-time jobs to pay for their film editing and now share their findings with college students across the country.

Hiden said the entire process has completely changed his life. "I feel much more comfortable with taking risks now, which is great," he said. "It's so rewarding when you can put yourself out there, do something rewarding you're unsure about or are not sure if it's totally safe." Irvin added, "I definitely [have] a belief in myself now that I could do most things I set my mind to."

Filming "The Dream Share Project" helped Irvin and Hiden get closer to their own dreams as well. Irvin aspires to be not only a writer, but became interested in filmmaking after directing the film. Hiden hopes to become an entrepreneur and his entrepreneurial work with the project has helped him achieve some of his goals.

After Irvin and Hiden screened "The Dream Share Project" to a group of eager students, they conducted a workshop in which the attendees expressed their interests and possible dreams through different exercises. The workshop was designed to help students explore their passions and venture out of their comfort zone by working with the other attending students.

Freshman Katie Vaughn said the documentary and workshop inspired her to begin the search for her own dream.  She said, " I really felt that I wasn't the only person who doesn't know what they want to do with their life, and maybe if I try a little harder, I'll know … and find people who can help me discover what I'm good at and what I'm passionate about."

Freshman Megan Mills, whose dream is to do missions work, said the presentation "helped convince me that even though my dream is a little bit crazy, nothing's going to stop me from doing it. I can do whatever I want."

2012年1月31日星期二

Hyundai i30 will be cheap to buy, insure and refuel

Full details have been released for Hyundai's new i30 small family hatchback, revealing low insurance groups, efficient engines and a starting price of $14,495.

The good looks of Hyundai's new C-segment car have already been noted, but thanks to an efficient diesel engine with emissions as low as 97g/km and fuel economy above 75mpg, Hyundai hopes to appeal to both hearts and minds to make inroads into a market dominated by the Ford Focus, Vauxhall Astra and Volkswagen Golf.

Both petrol and diesel fans will be able to choose from 1.4 and 1.6-litre engines, with the 1.6 petrol only available with an automatic gearbox and the 1.6 diesel optionally available with one in Active trim and above.

Both manual 1.6 diesels are road-tax exempt under the current UK system, although choosing the automatic gearbox for the 109bhp diesel ups its emissions to 145g/km.

Two of the most basic versions sit in insurance group 7E, placing them among the cheapest cars in the segment to insure. The top-of-the-range model falls into group 14E, which is still very reasonable.

Four trim levels will be available, starting with Classic at the bottom. Active, Style and Style Nav are the other choices in ascending order, while there will be five engine power outputs to choose from.

Every new i30 benefits from voice-activated Bluetooth, LED daytime running lights, a multi-function steering wheel, electrically adjustable and heated door mirrors and one-touch indicators.

Safety systems added as standard across the range include vehicle stability management, emergency stop signal and hill-start assist control.

Active models add 15in alloys, cruise control, rear parking sensors and Hyundai's new dynamic Flex Steer system, which gives the driver the option of three settings: comfort, normal and sport.

Style models get 16in alloy wheels, dual-zone climate control, front parking sensors, rain-sensing wipers, cornering lights, automatic headlights, an automatic de-fogging system for the front windscreen, and electrically folding door mirrors with LED indicators.

Then Style Nav adds a fully integrated touchscreen satellite navigation system and rear-view parking camera.

2012年1月30日星期一

To do away with electric lamps

The United Nations is urging the world to get rid of incandescent lamps. It has set itself the task to root out the invention of the Russian scientist Alexander Ladygin as ineffective by the year 2016, despite the fact that it has been used for more than a century and has proved good. The UN experts say that it is one of the reasons for global warming.

One year ago Russia got involved in the project en.lighten: which provides for a gradual transition to more modern and “green” illumination technologies which are using more than 20 per cent of world electricity. The UN Environment Programme and also that of the Global Environment Fund (GEF) offers to twice reduce spending at the minimum. If mankind gives up electric lamps by 2020, there will be a chance to avoid global warming.

In the course of a year all lamps with the capacity of 100 watts went out of sale in Russia. All the rest, that is, all electric lamps to which the former Russian leader Vladimir Lenin gave the green light to at the beginning of the last century as part of his plan for the electrification of Russia (GOELRO Plan) are expected to be banned by the year 2014. 100 years ago nobody thought of their efficiency, Head of the Green Peace Russia programme on energy efficiency Igor Podgorny said.

"It was decided that at the first stage it was necessary to get rid of 100-watt bulbs as well as the bulbs with a slightly higher capacity, which have proved to be the most non-economical lamps. In fact, all these are rather heating than lightening devices. Electric lamps convert about 95 per cent of electricity to warmth and only the remaining 5 per cent - to light. At the moment it is impossible to say whether this experiment was a success because one year is a small period. But it will be successful in any case. Simply because energy-saving fluorescent bulbs make it possible to reduce energy consumption 4 to 5 times, which is very good."

Europe stopped using electric lamps 3 years ago.

Meanwhile, scientists continue sending alarming signals. According to the International Energy Agency (IEA), greenhouse gas emissions into the atmosphere from power production generate hundreds of millions of tons of carbonic acid (CO2). Therefore, it is rather doubtful though that a ban on the use of non-effective lamps will be helpful in saving ecology. More radical measures are needed here, Ruslan Sorokin says.

"Electric lamps generate 246 million tons of carbonic acid annually. However, this is not much in relation to the world. Car exhausts generate a lot more poisonous substances."

The United Nations urges mankind to replace electric lamps with fluorescent ones. However, the technologies are developing fast, and soon the latter will be banned too because light-emitting-diodes (LED), which make it possible to save electricity, are coming in place. The majority of office complexes in Moscow are using them.

However, not all countries are ready to get involved in the United Nations project, and weak economies are the reason. The production of effective lamps, which make it possible to reduce the price of electricity, is an expensive pleasure.

2012年1月29日星期日

Pioneering Extreme Brightness LED Lamps

Thanks to the SABIC materials, BritePointe's HyBeem high-bay LED downlights for commercial and public buildings may cut energy use by up to 65 percent vs. high intensity discharge (HID) fixtures and fluorescents and last up to five times as long, thus potentially reducing maintenance costs. SABIC's collaboration with BritePointe demonstrates the company's commitment to supporting the lighting market's shift toward sustainable lighting technologies and reinforces the value of its high performance resins, which give LED lighting designers the freedom to take new approaches, unfettered by the limitations of traditional materials such as metal.

"SABIC's advanced thermoplastics are a critical element of our new HyBeem product," said Tom Griffin, CEO, BritePointe, Inc. "You cannot make an LED-based replacement lamp emitting tens of thousands of lumens unless it is small and extremely light weight, so using metal in this case simply wasn't an option. SABIC's strong, lightweight and versatile materials were the ideal solution to design our LED line and we couldn't be more pleased with the results."

Hybeem LED lighting from BritePointe delivers the lighting equivalence of a conventional metal halide HID or high-pressure sodium (HPS) vapor light source in a similar form factor with substantial power savings and a service life of up to 50,000 hours. Other potential benefits over HIDs include improved safety and "instant on" capability that supports the use of timers and sensors for additional energy savings.

LEDs also avoid the issue of cycling with HPS lights. HyBeem BP400 series high-bay lamps deliver 15,000 lumens with the lowest mass and smallest size on the market today. They are the first to surpass the theoretical Shuja-Line limit of 2,500 lumens per kilogram by more than 100 percent.

Manufacturers are moving beyond metal and other traditional materials to take advantage of the benefits of plastics, including part integration and design flexibility, light weight, high strength and durability, elimination of secondary operations and a wide choice of aesthetic effects.

"I am impressed with SABIC's high level of service and broad product portfolio. SABIC's sales and support teams generously offered knowledgeable guidance for optimal use of their materials. This assistance is greatly appreciated as we continue to implement strong, lightweight plastics in our products," Griffin said.

The design flexibility of Cycoloy resin enabled BritePointe to create a sophisticated solution with patent-pending thermal management technology built into the lighting fixture. Molded-in color allowed the company to avoid the cost and environmental impact of secondary painting. The selection of Lexan FXD resin in this application shows the viability of PC for use in new LED applications such as lenses, covers and reflectors.

"SABIC's high-performance materials are playing a key role in the growth and diversity of the LED lighting sector, as demonstrated by the success of the HyBeem product line," said Heath Schmid, PC market director, Innovative Plastics.
"Our resins and composites make tremendous contributions to LED design and performance, including optimized light transmission and thermal management, improved aesthetics that appeal to end users and enhanced sustainability. Our collaboration with BritePointe has resulted in exciting new retrofit choices for users of high-bay lighting."

2012年1月15日星期日

Casio Announces New Hybrid LED-Laser Projector Models

Casio announced six new models in its SLIM line of hybrid LED-laser projectors at the Consumer Electronics Show this week: the XJ-A141, XJ-A146, XJ-A241, XJ-A246, XJ-A251 and XJ-A256.

Each weighing five pounds, the new SLIM projectors are 1.7 inches high, which, according to Casio, makes them the thinnest high-brightness projectors in the industry. A wide-angle 2X power zoom lens allows an extensive range of projection distance. Three of Casio's new SLIM projectors—the XJ-A146, XJ-A246 and XJ-A256—are equipped with USB capabilities, MobiShow, wireless presentation capability, and a presentation timer.

MobiShow makes business presentations possible from most popular mobile devices using only a Wi-Fi connection.  MobiShow is compatible with Microsoft Windows Mobile, iPhone, iPad, and Android operating systems. Additionally, the SLIM USB models have the ability to make wireless presentations from Mac computers. Up to 32 computers can be connected at one time and users can also view up to four PCs on an individual screen simultaneously.

The built-in presentation timer function lets users keep track of time and ensure all presentations are done in a timely fashion. A compact window is displayed in the corner of the screen and lets both the presenter and audience know how much time is left for the presentation.

The latest introductions in the SLIM lineup feature innovative functions such as Intelligent Brightness Control, an ECO function that minimizes power consumption by using no more than the level of brightness actually required all while illuminating sharp imagery.

Intelligent Brightness Control utilizes a built-in light sensor to automatically adjust the brightness level of the projection to suit the lighting conditions of any room. Brightness can be adjusted continuously and smoothly due to the laser and LED hybrid light source, a feature not possible with traditional mercury lamps.

The SLIM projectors are powered by Casio's laser and LED hybrid light source and DLP technology that provides lamp-free, eco-friendly data projection at a fraction of the cost of traditional projectors. Casio's laser and LED hybrid light source Source combines blue laser light and a fluorescent element to generate a high output of green light.

The green light, blue laser light, and the light emitted by a red LED are projected through a DLP chip which, in turn, is passed through the projection lens to form an image. This technology achieves an increase in color spectrum compared with a mercury lamp, while lowering a projector's total cost of ownership and maximizing investment.

2012年1月11日星期三

Drink-driver done twice on one night

JODIE Grigsby recorded a blood alcohol reading of 0.219 after backing across a median strip in Albury's main street, crashing into a pedestrian sign and a street light on the opposite footpath.

She was not wearing a seat belt, appeared in a dishevelled state when police quickly arrived and the engine was still running.

Police took the keys and Grigsby had to be helped out.

A court has heard the incident happened about 2.30am on December 10 and Grigsby was released four hours later after being processed by police.

But just 20 minutes later, she returned to the police station to report her mobile phone and purse missing.

Grigsby had driven from Dean Street to Olive Street and parallel parked out the front of the station instead of being at a 45-degree angle.

She left the station at 7am, went towards her vehicle and police asked whether she drove there.

Her response was: "Yes. I needed to report my phone and purse stolen."

It led to her being arrested a second time and she recorded a blood alcohol level of 0.159.

The second driving episode was aggravated by the fact that police had suspended her licence after the first incident.

Grigsby, 36, of George Street, pleaded guilty in Albury Local Court to two counts of high range drink-driving and driving while her licence was suspended.

Magistrate Gordon Lerve was told she had lost her licence for similar offences in Victoria.

Mr Lerve said it was appropriate to get a pre-sentence report and adjourned her sentencing until March 20.

Grigsby told police she had six glasses of wine between 7pm and 2am.

Police were speaking to a driver in Dean Street when they heard the screeching of tyres a short distance away.

They heard a thud and saw Grigsby's vehicle go over the median strip from the southern side, hit a sign and then a street light on the northern kerb.

She was arrested at 2.30am, charged with drink-driving and had her driving privileges withdrawn.

Police said Grigsby showed no sign of remorse after driving the second time.