Showing posts with label Science and Technology. Show all posts
Showing posts with label Science and Technology. Show all posts
 NASA Discovers New Solar System with 6 Planets
 
 NASA's Kepler space telescope spots odd new solar system with five planets orbiting close to a distant star. Jane Ross reports.
This is the largest group of transiting planets orbiting a single star yet discovered outside our solar system," NASA said.

With temperatures hotter than Venus -- likely more than 400 to 1,400 degrees Fahrenheit, the six planets range in size from twice to four and a half times Earth’s diameter, astronomers said.

The five confirmed planets are larger in mass but less dense than Earth, and closely packed, taking from 10 to 47 days to orbit the star. Astonomers said there is almost certainly a sixth planet orbiting nearly twice as far away, but its distance from the star makes its confirmation more difficult.

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According to NASA, all of the planets orbiting Kepler-11 are larger than Earth, with the largest ones being comparable in size to Uranus and Neptune. The innermost planet, Kepler-11b, is ten times closer to its star than Earth is to the sun. Moving outward, the other planets are Kepler-11c, Kepler-11d, Kepler-11e, Kepler-11f, and the outermost planet, Kepler-11g, which is half as far from its star as Earth is from the sun.

The planets Kepler-11d, Kepler-11e and Kepler-11f have a significant amount of light gas, which indicates that they formed within a few million years of the system's formation, NASA said.

These six planets, which are mixtures of rock and gases possibly including water, were found by tracking the dimming of a star’s light when planets pass between the star and the telescope, astronomers said.

The astronomers said the next step will be to determine mass and orbits of the planets more precisely, providing clues to how the planets formed.

"Much of the scientific community thought that multiple planets transiting the same star would be unlikely," said Eric Ford of NASA team and University of Florida associate professor. "That idea has been completely overturned by this new discovery. Without the transit-timing method, these planets might have gone unconfirmed for years."

The discoveries are part of several hundred new planet candidates identified in new Kepler mission science data, released on Tuesday. The findings increase the number of planet candidates identified by Kepler to-date to 1,235.
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LONDON - COMPANIES for the first time report they are losing more through electronic theft of data than physical stealing of assets, risk consultancy Kroll said on Monday in an annual report on international fraud trends.
Fraud was most often an 'inside job' carried out by a company's own employees, the poll of more than 800 senior executives worldwide showed. Worries over fraud were deterring many companies from expanding in some key emerging markets.
China appeared the key emerging market with the highest level of fraud, with 98 per cent of businesses affected. This was followed by Colombia with 94 per cent and Brazil with 90 per cent.
The 2010 study showed the amount lost by businesses to fraud rose to US$1.7 million (S$2.2 million) per billion dollars sales worldwide from US$1.4 million a year earlier, the report said - although this might in part be due to better detection and awareness.
'How much fraud there is depends more on opportunity than anything else,' Tommy Helsby, Kroll chairman for Europe, Middle East and Africa, told Reuters. 'Much more work is done electronically, and that creates new opportunities for fraud. It takes time for companies to catch up with that.' Previous Global Fraud Reports showed physical theft of cash, assets and inventory as the most widespread form of fraud by a considerable margin. This year's findings showed electronic and information theft at 27.3 per cent of total fraud losses, marginally above physical theft at 27.2 per cent.
Information-based industries particularly financial services had by far the highest level of electronic theft followed by professional services and then technology, media and telecoms. -- REUTERS
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The road to Mars leads right past the moon. So why isn't a return trip on the agenda?

That's what Buzz Aldrin wants to know.

President Obama recently green-lighted a brand new mission and a new budget for NASA, including a grand long-term goal: a manned mission to Mars. But Aldrin, the second man to walk on the moon, says the moon is much more essential to American space efforts.

In its haste to make new policy, Aldrin and other experts say, NASA is overlooking a critical component of space travel: a permanent, manned base on the moon that would make reaching Mars a much easier task.

But Aldrin disagrees. Citing key holes in NASA's new plan, he and other space gurus think a minor mid-course correction in strategy
could lead to a "mission accomplished" sign when it comes to revamping NASA. For example, the new budget was "not clear" on how the rollout for a mission to Mars would happen.
Aldrin believes NASA should move in stages toward a manned mission to Mars, by building outer space fuel stations and developing the moon. He said NASA has already spent hundreds of millions researching the projects, and their investment should be utilized -- as recommended by Norm Augustine, former chairman of the Pentagon’s Defense Science Board and chairman of the Review of the U.S. Space Flight Plans Committee.

What's more, Aldrin said, the American government should not simply shrug off the considerable experience we have with lunar travel. "The U.S. has the most experience in the world, of any nation, in dealing with the moon,". "It doesn’t take a rocket scientist to see that flexibility is needed here."

Some experts support the new path, including Jeffrey Manber, who oversaw commercial space policy for the Reagan administration and is now managing director of space research technology developer NanoRacks. He says the moon is an old goal -- and Mars is the future.

"America has been to the moon six times. A seventh voyage would neither inspire the next generation nor require massive investments in new technology," Manber told. "If we remove our partisan blinders, it's clear that it is time for NASA and our space program to behave like other, commercial programs: from the bottom-up, unleashing the creativity of the private sector."

But others remain critical of the effort. Ray Nackoney, a professor of astrophysics at Loyola University in Chicago, said he simply cannot support the idea of a manned mission to Mars.

"To get to Mars with current technology, the trip will not take three days, as when going to the moon, but over eight months," Nackoney. "And eight months to get back. The astronauts will spend more than a year on Mars to get the correct alignment of the planets to make the most efficient trip back. Will we really do this? I doubt it will occur in my lifetime."

Aldrin, who is launching a new think tank called U.S.S. Enterprise -- which stands for unified, strategic, space enterprise -- said NASA should take advantage of the natural cycle of the planets for the most efficient travel across the solar system. "A unified space exploration policy is what is needed for the U.S.," he said.

But David Weaver, a spokesman for NASA, said that there is wide support in private industry and in the government for Obama's strategy.

"There are statements supporting the president’s new vision for NASA from Norm Augustine, Charles Bolden and John Holdren," Weaver said in an interview. He said that the new legislation supports the President’s ambitious plan for NASA to pioneer new frontiers of innovation and discovery. Why Mars, and not the moon? "That should help answer your question," he said.

Aldrin doesn’t blame Obama for where NASA and the U.S. are today in terms of space policy. The famed astronaut and engineer notes there have been a "series of miscues," going all the way back to the Nixon administration, that have interfered with NASA moving forward with an innovative agenda.

"For decades, we’ve been misdefining our transitional space programs," Aldrin said. "A vision like in the early days of the space race showing the logical progression from Mercury to Gemini to Apollo is what is needed today to show why we need to go to Mars -- and how we will get there."
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Nikon Launches D7000 costs at $1200

 Nikon recently launched Latest Camera D7000 with full supportive for all photographers
Nikon D7000 Price Details 
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Nikon Image Gallery



Nikon D7000 Review and Specification



Type
Type
Single-lens reflex digital camera
Lens mount
Nikon F mount (with AF coupling and AF contacts)
Effective angle of view
Approx. 1.5 x lens focal length (Nikon DX format)
Effective pixels
Effective pixels
16.2 million
Image sensor
Image sensor
23.6 x 15.6 mm CMOS sensor
Total pixels
16.9 million
Dust-reduction system
Image sensor cleaning, Image Dust Off reference data (optional Capture NX 2 software required)
Storage
Image size (pixels)
  • 4,928 x 3,264 [L]
  • 3,696 x 2,448 [M]
  • 2,464 x 1,632 [S]
File format
  • NEF (RAW): 12 or 14 bit, lossless compressed or compressed
  • JPEG: JPEG-Baseline compliant with fine (approx. 1:4), normal (approx. 1:8) or basic (approx. 1:16) compression (Size priority); Optimal quality compression available
  • NEF (RAW) + JPEG: Single photograph recorded in both NEF (RAW) and JPEG formats
Picture Control System
Standard, Neutral, Vivid, Monochrome, Portrait, Landscape; selected Picture Control can be modified; storage for custom Picture Controls
Media
SD (Secure Digital), SDHC and SDXC memory cards
Double slots
Slot 2 can be used for overflow or backup storage or for separate storage of copies created using NEF + JPEG; pictures can be copied between cards
File system
DCF (Design Rule for Camera File System) 2.0, DPOF (Digital Print Order Format), Exif 2.3 (Exchangeable Image File Format for Digital Still Cameras), PictBridge
Viewfinder
Viewfinder
Eye-level pentaprism single-lens reflex viewfinder
Frame coverage
Approx. 100% horizontal and 100% vertical
Magnification
Approx. 0.94 x (50 mm f/1.4 lens at infinity, -1.0 m-1)
Eyepoint
19.5 mm (-1.0 m-1)
Diopter adjustment
-3 to +1 m-1
Focusing screen
Type B BriteView Clear Matte screen Mark II with AF area brackets (framing grid can be displayed)
Reflex mirror
Quick return
Depth-of-field preview
Pressing depth-of-field preview button stops lens aperture down to value selected by user (A and M modes) or by camera (other modes)
Lens aperture
Instant return, electronically controlled
Lens
Compatible lenses
  • DX AF NIKKOR: All functions supported
  • Type G or D AF NIKKOR: All functions supported (PC Micro-NIKKOR does not support some functions); IX-NIKKOR lenses not supported
  • Other AF NIKKOR: All functions supported except 3D color matrix metering II; lenses for F3AF not supported
  • AI-P NIKKOR: All functions supported except 3D color matrix metering II
  • Non-CPU: Can be used in modes A and M; color matrix metering and aperture value display supported if user provides lens data (AI lenses only)
  •  Note: Electronic rangefinder can be used if maximum aperture is f/5.6 or faster
Shutter
Type
Electronically-controlled vertical-travel focal-plane shutter
Speed
1/8,000 to 30 s in steps of 1/3 or 1/2 EV, bulb, time (requires optional Remote Control ML-L3), X250
Flash sync speed
X = 1/250 s; synchronizes with shutter at 1/320 s or slower (flash range drops at speeds between 1/250 and 1/320 s)
Release
Release modes
S (single frame), CL (continuous low speed), CH (continuous high speed), Q (quiet shutter-release), self-timer(self-timer), remote control(remote control), MUP (mirror up)
Frame advance rate
Approx. 1 to 5 fps (CL) or approx. 6 fps (CH) (CIPA guidelines)
Self-timer
2 s, 5 s, 10 s, 20 s; 1 to 9 exposures at intervals of 0.5, 1, 2, or 3 s
Remote release modes
Delayed remote, quick-response remote, remote mirror-up
Exposure
Metering
TTL exposure metering using 2,016-pixel RGB sensor
Metering method
  • Matrix: 3D color matrix metering II (type G and D lenses); color matrix metering II (other CPU lenses); color matrix metering available with non-CPU lenses if user provides lens data
  • Center-weighted: Weight of 75% given to 8-mm circle in center of frame; diameter of circle can be changed to 6, 10 or 13 mm, or weighting can be based on average of entire frame (fixed at 8 mm when non-CPU lens is used)
  • Spot: Meters 3.5-mm circle (about 2.5 % of frame) centered on selected focus point (on center focus point when non-CPU lens is used)
Range
(ISO 100, f/1.4 lens, 20°C/68°F)
  • Matrix or center-weighted metering: 0 to 20 EV
  • Spot metering: 2 to 20 EV
Exposure meter coupling
Combined CPU and AI
Exposure modes
Auto (auto; auto [flash off]), scene (portrait, landscape, child, sports, close up, night portrait, night landscape, party/indoor, beach/snow, sunset, dusk/dawn, pet portrait, candlelight, blossom, autumn colors, food, silhouette, high key, low key), programmed auto with flexible program (P), shutter-priority auto (S), aperture-priority auto (A), manual (M), U1 (user settings 1), U2 (user settings 2)
Exposure compensation
-5 to +5 EV in increments of 1/3 or 1/2 EV
Exposure bracketing
2 to 3 frames in steps of 1/3, 1/2, 2/3 or 1 EV
Exposure lock
Luminosity locked at detected value with AE-L/AF-L button
ISO sensitivity
(Recommended Exposure Index)
ISO 100 to 6400 in steps of 1/3 or 1/2 EV; can also be set to approx. 0.3, 0.5, 0.7, 1 or 2 EV (ISO 25600 equivalent) above ISO 6400; auto ISO sensitivity control available
Active D-Lighting
Can be selected from auto, extra high, high, normal, low or off
ADL bracketing
2 frames using selected value for one frame or 3 frames using preset values for all frames
Focus
Autofocus
Nikon Multi-CAM 4800DX autofocus sensor module with TTL phase detection, finetuning, 39 focus points (including 9 cross-type sensors), and AF-assist illuminator (range approx. 0.5 to 3 m/1 ft. 8 in. to 9 ft. 10 in.)
Detection range
-1 to +19 EV (ISO 100, 20°C/68°F)
Lens servo
  • Autofocus (AF): Single-servo AF (AF-S); continuous-servo AF (AF-C); auto AF-S/AF-C selection (AF-A); predictive focus tracking activated automatically according to subject status
  • Manual focus (M): Electronic rangefinder can be used
Focus point
Can be selected from 39 or 11 focus points
AF-area mode
Single-point AF; 9-, 21- or 39-point dynamic-area AF, 3D-tracking, auto-area AF
Focus lock
Focus can be locked by pressing shutter-release button halfway (Single-servo AF) or by pressing AE-L/AF-L button
Flash
Built-in flash
  • Auto,Portrait,Child,Close up,Night portrait,Party/indoor,Pet portrait: Auto flash with auto pop-up
  • P, S, A, M,Food: Manual pop-up with button release
Guide number
Approx. 12/39 , 12/39 with manual flash (m/ft, ISO 100, 20°C/68°F)
Flash control
  • TTL: i-TTL balanced fill-flash and standard i-TTL flash for digital SLR using 2,016-pixel RGB sensor are available with built-in flash and SB-900, SB-800, SB-700, SB-600 or SB-400 (i-TTL balanced fill-flash is available when matrix or center-weighted metering is selected)
  • Auto aperture: Available with SB-900/SB-800 and CPU lens
  • Non-TTL auto: Supported flash units include SB-900, SB-800, SB-28, SB-27 and SB-22S
  • Distance-priority manual: Available with SB-900, SB-800 and SB-700
Flash modes
  • Auto,Portrait,Child,Close up,Party/indoor,Pet portrait: Auto, auto with red-eye reduction, off; fill-flash and red-eye reduction available with optional flash units
  • Night portrait: Auto slow sync, auto slow sync with red-eye reduction, off; slow sync and slow sync with red-eye reduction available with optional flash units
  • Landscape,Sports,Night landscape,Beach/snow,Sunset,Dusk/dawn,Candlelight,Blossom,Autumn colors,Silhouette,High key,Low key: Fill-flash and red-eye reduction available with optional flash units
  • Food: Fill-flash
  • P, A: Fill-flash, slow sync, red-eye reduction, slow sync with red-eye reduction, rear-curtain with slow sync
  • S, M: Fill-flash, red-eye reduction, rear-curtain sync
Flash compensation
-3 to +1 EV in increments of 1/3 or 1/2 EV
Flash bracketing
2 to 3 frames in steps of 1/3, 1/2, 2/3 or 1 EV
Flash-ready indicator
Lights when built-in flash or optional flash unit such as SB-900, SB-800, SB-700, SB-600, SB-400, SB-80DX, SB-28DX or SB-50DX is fully charged; blinks for 3 s after flash is fired at full output
Accessory shoe
ISO 518 hot-shoe with sync and data contacts, and safety lock
Nikon Creative Lighting
System (CLS)
Advanced Wireless Lighting supported with built-in flash, SB-900, SB-800, SB-700 or SU-800 as commander and SB-900, SB-800, SB-700, SB-600 or SB-R200 as remotes; Auto FP high-speed sync and modeling illumination supported with all CLS-compatible flash units except SB-400; Flash Color Information Communication and FV lock supported with all CLS-compatible flash units
Sync terminal
Sync Terminal Adapter AS-15 (available separately)
White balance
White balance
Auto (2 types), incandescent, fluorescent (7 types), direct sunlight, flash, cloudy, shade, preset manual (up to 5 values can be stored), choose color temperature (2,500 K to 10,000 K), all with fine tuning; white balance bracketing: 2 to 3 frames in steps of 1, 2 or 3
Live View
Lens servo
  • Autofocus (AF): Single-servo AF (AF-S); full-time-servo AF (AF-F)
  • Manual focus (M)
AF-area modes
Face-priority AF, wide-area AF, normal-area AF, subject-tracking AF
Autofocus
Contrast-detect AF anywhere in frame (camera selects focus point automatically when face-priority AF or subject-tracking AF is selected)
Movie
Metering
TTL exposure metering using main image sensor
Metering method
Matrix
Frame size (pixels)
and frame rate
[NTSC] · 1,920 × 1,080 (24p); 24 (23.976) fps · 1,280 × 720 (30p); 30 (29.97) fps · 1,280 × 720 (24p); 24 (23.976) fps · 640 × 424 (30p); 30 (29.97) fps
[PAL] · 1,920 × 1,080 (24p); 24 (23.976) fps · 1,280 × 720 (25p); 25 fps · 1,280 × 720 (24p); 24 (23.976) fps · 640 × 424 (25p); 25 fps
Choice of normal and high quality available
Maximum length
Approx. 20 minutes
File format
MOV
Video compression
H.264/MPEG-4 Advanced Video Coding
Audio recording format
Linear PCM
Audio recording device
Built-in monaural or external stereo microphone; sensitivity adjustable
Monitor
LCD monitor
7.5-cm (3-in.), approx. 921k-dot (VGA), low-temperature polysilicon TFT LCD with 170° viewing angle, approx. 100% frame coverage, and brightness adjustment
Playback
Playback function
Full-frame and thumbnail (4, 9 or 72 images or calendar) playback with playback zoom, movie playback, slide show, highlights, histogram display, auto image rotation and image comment (up to 36 characters)
Interface
USB
Hi-Speed USB
Video output
NTSC, PAL; images can be displayed on external device while camera monitor is on
HDMI output
Type C mini-pin HDMI connector; camera monitor turns off when HDMI cable is connected
Accessory terminal
  • Remote cord: MC-DC2 (available separately)
  • GPS Unit: GP-1 (available separately)
Supported languages
Supported languages
Arabic, Chinese (Simplified and Traditional), Czech, Danish, Dutch, English, Finnish, French, German, Indonesian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Thai, Turkish
Power source
Battery
One Rechargeable Li-ion Battery EN-EL15
Battery pack
Optional Multi-Power Battery Pack MB-D11 with one Rechargeable Li-ion Battery EN-EL15 or six R6/AA size alkaline, NiMH or lithium batteries
AC adapter
AC Adapter EH-5a; requires Power Connector EP-5B (available separately)
Tripod socket
Tripod socket
1/4 in. (ISO 1222)
Dimensions / weight
Dimensions (W x H x D)
Approx. 132 × 105 × 77 mm (5.2 × 4.1 × 3.0 in.)
Weight
Approx. 690 g (1 lb. 8.3 oz.) camera body only; approx. 780 g (1 lb. 11.5 oz.) with battery and memory card but without body cap
Operating environment
Temperature
0 to 40°C (32 to 104°F)
Humidity
Less than 85% (no condensation)
Accessories
Supplied accessories
(may differ by country or area)
Rechargeable Li-ion Battery EN-EL15, Battery Charger MH-25, Eyepiece Cap DK-5, Rubber Eyecap DK-21, USB Cable UC-E4, Audio Video Cable EG-D2, Camera Strap AN-DC1, LCD Monitor Cover BM-11, Body Cap BF-1B, Accessory Shoe Cover BS-1, ViewNX 2 ROM
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  • *Images in viewfinders, on LCDs and monitors shown in this website are simulated.
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