Thursday, August 17 

Digital Camera


Points you should note while buying a digital camera are:
  • Resolution:
    Although a decent resolution is necessary, investing just on resolution does not necessarily make sense. When 2-3 MPixel camera is sufficient for most of us, I have seen people put hundreds of dollars into getting a 6.3 MPixel one.
    There are two places where higher resolution comes in handy:
    Printing : When you are going to develop your photos to huge prints, higher resolutions come in handy. But ask yourself, how many times are you going to print larger than 5x10? To help you make a decision, here is a table of Resolution to printable size table:

  • Digital Camera Resolution Chart
    Capture Resolution
    Video Display*
    Print Size***
    2x3"
    4x5"/4x6"
    5x7"
    8x10"
    11x14"
    16x20"
    320x240
    Acceptable
    Good
    Acceptable
    Poor
    Poor
    Poor
    Poor
    640x480 -
    0.3 Megapixel
    Good
    Excellent
    Good
    Poor
    Poor
    Poor
    Poor
    800x600
    Excellent
    Photo Quality
    Very Good
    Acceptable
    Poor
    Poor
    Poor
    1024x768
    Excellent
    Photo Quality
    Excellent
    Good
    Acceptable
    Poor
    Poor
    1280x960 -
    1 Megapixel
    Excellent
    Photo Quality
    Photo Quality
    Very Good
    Good
    Poor
    Poor
    1536x1180
    Excellent**
    Photo Quality
    Photo Quality
    Excellent
    Very Good
    Acceptable
    poor
    1600x1200 -
    2 Megapixel
    Excellent**
    Photo Quality
    Photo Quality
    Photo Quality
    Very Good
    Acceptable
    Acceptable
    2048x1536 -
    3 Megapixel
    Excellent**
    Photo Quality
    Photo Quality
    Photo Quality
    Excellent
    Good
    Acceptable
    2240x1680 -
    4 Megapixel
    Excellent**
    Photo Quality
    Photo Quality
    Photo Quality
    Photo Quality
    Very Good
    Good
    2560x1920 -
    5 Megapixel
    Excellent**
    Photo Quality
    Photo Quality
    Photo Quality
    Photo Quality
    Excellent
    Very Good
    3032x2008 -
    6 Megapixel
    Excellent**
    Photo Quality
    Photo Quality
    Photo Quality
    Photo Quality
    Photo Quality
    Excellent

    • Cropping: When you have not enough optical zoom to zero into the subject, or you want to take a photo which is not of regular size (like panoramic ones), you might want to take the photo and later crop (delete portions of it from borders) the photo on a computer. From my experience, after the first few months of buying the DigiCam, you won't have time to do cropping most of the time. For long distance photography, it's better to invest on a camera with good optical zoom. For Panoramic photographs, there are digital cameras (at least Canon has this feature) which allows you to take wide panoramas in stitch-assist modes (each shot is aligned to the next shot on the screen).
  • Optical Zoom:
    A lot of lower end digital cameras claim significant digital zoom. Some of them increment the zoom factor by multiplying Digital and Optical zooms ( i.e. a camera with 3x optical and 4x digital zooms claims to have 4X2=8x total zoom!!). It is better to discount the digital zoom part totally, as, it is effectively extrapolating your pixels (and losing details in the process). To do digital zoom, your photo editing computer will be much more effective than your camera. It's better to invest in a camera with good optical zoom that other bells and whistles.
  • Shutter Delay:
    A regular film camera operates in the following mode: when you press the shutter, the barrier between the outside world and the film gets removed for a brief period of time, allowing the chemicals on the film to react to the external light, thus capturing a 'photo' of it. On the other hand, a digital camera has a sensor plate (CCD or CMOS) in place of the film. As soon as the shutter is pressed, the barrier gets removed in the same manner as the film camera for a minute amount of time. But, instead of chemicals reacting to light (which can happen all over the film simultaneously), a processor starts reading the info from the sensor plate. This, depending on the capabilities of the camera, can take a significant time, causing a shutter lag (delay between pressing the shutter and capturing the photo). Research the shutter lag of the camera you are planning to buy before committing on it.
  • Night Shot:
    You'll have one of the major set-backs while shooting at lowlight with a digital camera. In case of a film camera, the shots taken at lowlight can be dim, but they will always be smooth. Whereas for digital cameras, the image taken at lowlight will not be smooth but significantly grainy, giving it that ghostly look. Do a little research on the nightshot capabilities of the camera you are going to buy. Another major disadvantage of digital cameras is significant red-eye. This phenomenon is present in the film cameras too. But digital cameras, being smaller and smaller, the distance between the lense and the flash has reduced, enhancing the red-eye problem.
  • Battery Type:
    This is of not much concern if you are buying and using the camera in the same geographical region. But if you are buying the camera, say in USA, and sending it to, say India for your kid brother, you might take the battery type used by the camera into consideration. A replacement of the proprietary rechargeable batteries used in the compact digital cameras may not be available everywhere.
    Also, you might want to consider buying a spare battery for you. Going on a long camping trip, you don't want to run out of bettery. If you go for long trips to back-country, away from civilization (meaning BestBuy, CircuitCity or Frys!!), you might want to consider cameras that take standard (AA/AAA) batteries.






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"All the desirable things in life are either illegal, expensive, fattening or married to someone else!"
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Monday, July 17 

Scientists conjure true 'cloaking' device

A way to vanish matter before your eyes has become a serious possibility thanks to theoretical research announced today by British and American scientists.

When built, the device theorised by the research could achieve a similar magical effect to that seen in Harry Potter movies, where the trainee wizard dons a special cape and becomes invisible.
The research suggests a way to build a 'cloaking' or shielding device that renders whatever is placed inside it invisible. It would also nullify the effects of other electromagnetic radiation - meaning that objects sitting within the cloak would be impervious to radar detection.
The scientists from Imperial College London and Duke University, USA, announced their findings in a paper published in Science Express today (26 May).
Professor Sir John Pendry discovers 'cloaking' device that could render whatever is placed inside it invisible
"Just as in the Harry Potter film, nobody would be able to see an object if it was cloaked, as it's in a spacewarp, and that's exactly what our stuff would do," says Professor Sir John Pendry Opens in new window of the Department of Physics at Imperial College London and first author of the research.
The researchers propose to build a special material that wraps around an object and which would 'grab' light heading towards it and make it flow smoothly around the object rather than strike it. To an observer the light would appear to have behaved as if there was nothing there.
Sir John explains the concept by likening it to water flowing around a stick in a stream. "Water flows around the obstacle and continues smoothly on behind the stick downstream. That's the idea behind our theory."
Study co-authors David Schurig and David Smith of Duke University, are now attempting to build the special material, called a metamaterial, that will do the grabbing of light and achieve this effect in reality. The first device is likely to be at a very small scale, just a few tenths of a centimetre across.
However, the special effects of the cloaking device would not be limited just to light rays, but would extend to all other field lines, including lines of force. This suggests other novel uses, for example in an interventional MRI scanner, where metallic instruments and other sensitive measuring equipment cannot be used due to the scanner's very strong magnetic fields. Instruments contained within such a cloaking device could however be used safely.
Unlike other stealth or cloaking solutions currently under development, the proposed device would also operate across a range of frequencies, not just one. "Ours would be a broadband cloak," says Sir John.
Since the cloak could also be tuned to apply to any ranges of frequency on the electromagnetic spectrum, it could also shield objects at the radio frequencies used by radar. In fact, says Sir John, this is where the device may eventually make the biggest impact.
Fortunately, he says, the technical challenge of making the device is less exacting than that for another of his ideas, the perfect lens, and he expects the first to be made within one or two years, for radar applications.
"If you can make the right metamaterials you will be almost there. They should be much easier to make than those required for perfect lenses, since our cloaking device doesn't need to be made to a perfect quality to achieve the right result."
The inspiration for the theory builds on work undertaken by Sir John and a former graduate student Andrew Ward over a decade ago, which demonstrated not only a theoretical new way of steering light but, as it was later realised, a means of 'ripping' a hole in space.
"What this device would really do is a bit like making a black hole" said Sir John,"There would be no communication between the object that is cloaked and the outside world."
The research was supported with funding from EPSRC (Engineering and Physical Sciences Research Council, UK) and DARPA (Defense Advanced Research Projects Agency, US).
ENDS


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Blaming your faults on your nature does not change the nature of your faults!!!
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Sunday, July 16 

Top 100 Engineering Colleges In India


A recent flurry of private institutes has helped improve the scene, especially in south India

Rank Name of Institute

City

G/P

IC
(30)

I&F
(20)
PS
(15)
II
(15)
P
20)
T
(100)

Government = G; Private = P; Intellectual capital =IC; Infrastructure and Facilities=I&F; Pedagogic Systems=PS;
Industry Interface=II; Placements=P; T= Total;


1

IIT Kanpur

Kanpur

G

28.3

18.9

13.8

13.2

18.5

92.7

2

IIT Kharagpur

Kharagpur

G

27.9

18.8

13.7

13.5

18.3

92.2

3

IIT Bombay

Mumbai

G

27.2

18.6

13.0

13.7

18.7

91.2

4

IIT Madras

Chennai

G

26.7

18.3

13.3

12.9

17.8

89.1

5

IIT Delhi

Delhi

G

26.1

18.5

12.7

13.4

18.1

88.8

6

BITS Pilani

Pilani

P

25.8

17.8

13.5

13.5

17.3

87.9

7

IIT Roorkee

Roorkee

G

25.5

18.6

12.9

12.4

16.3

85.6

8

IT-BHU

Varanasi

G

23.9

18.2

12.7

11.9

15.9

82.6

9

IIT Guwahati

Guwahati

G

25.2

18.1

12.5

10.5

15.1

81.4

10

College of Engg, Anna University

Guindy

G

25.3

16.7

12.4

12.8

14.1

81.3

11

Jadavpur University, Faculty of Engg & Tech

Calcutta

G

25.2

16.4

11.7

11.4

15.4

80.1

12

Indian School of Mines

Dhanbad

G

24.7

15.5

12.2

12.2

14.7

79.3

13

NIT

Warangal

G

24.9

16.9

11.8

11.5

14.0

79.1

14

BIT, Mesra

Ranchi

P

23.6

13.7

12.3

12.3

14.2

76.1

15

NIT

Trichy

G

24.0

17.3

10.4

10.5

13.5

75.7

16

Delhi College of Engineering

New Delhi

G

22.4

15.9

12.6

10.8

13.8

75.5

17

Punjab Engineering College

Chandigarh

G

22.0

17.7

10.1

09.3

15.8

74.9

18

NIT

Suratkal

G

23.9

17.1

10.3

10.1

13.3

74.7

19

Motilal Nehru National Inst. of Technology

Allahabad

G

22.8

16.5

11.3

09.9

14.1

74.6

20

Thapar Inst of Engineering & Technology

Patiala

p

21.6

16.3

12.3

12.2

12.0

74.4

21

Bengal Eng and Science University, Shibpur

Howrah

G

23.0

15.7

12.0

10.5

12.1

73.3

22

MANIT

Bhopal

G

23.5

16.3

10.6

10.4

12.4

73.2

23

PSG College of Technology

Coimbatore

G

21.8

14.9

09.8

13.6

12.8

72.9

24

IIIT

Hyderabad

G

21.3

16.3

10.3

10.7

13.9

72.5

25

Harcourt Butler Technological Institute

Kanpur

G

23.0

15.5

11.3

10.2

12.4

72.4

26

Malviya National Institute of Technology

Jaipur

G

22.5

16.5

10.4

09.2

13.0

71.6

27

VNIT

Nagpur

G

21.8

15.7

10.8

10.2

12.5

71.0

28

NIT

Kozhikode

G

21.9

16.8

09.9

10.2

11.9

70.7

29

Dhirubhai Ambani IICT

Gandhinagar

P

22.7

16.3

10.6

09.6

11.2

70.4

30

Osmania Univ. College of Engineering

Hyderabad

G

22.7

14.0

10.3

10.9

12.4

70.3

31

College of Engineering, Andhra University

Vishakhapatnam

G

22.5

12.7

10.7

10.8

13.5

70.2

32

Netaji Subhas Institute of Technology

New Delhi

G

22.0

16.5

09.3

09.7

12.0

69.5

33

NIT

Kurukshetra

G

21.8

15.7

09.9

09.6

12.0

69.1

34

NIT

Rourkela

G

20.4

14.6

10.3

10.3

13.3

68.9

35

SVNIT

Surat

G

20.3

14.2

10.1

10.6

13.6

68.8

36

Govt. College of Engineering

Pune

G

21.2

12.2

11.1

11.5

12.7

68.7

37

Manipal Institute of Technology

Manipal

p

21.7

12.8

11.2

10.4

12.5

68.6

38

JNTU

Hyderabad

G

21.8

12.5

10.9

10.2

12.9

68.3

39

R.V. College of Engineering

Bangalore

p

20.6

13.2

10.8

10.6

13.0

68.2

40

NIT

Jamshedpur

G

19.9

13.4

10.4

10.4

14.0

68.1

41

University Visvesvaraya College of Engg.

Bangalore

G

22.0

13.3

09.6

09.9

12.8

67.6

42

VJTI

Mumbai

G

20.3

12.6

10.7

10.5

13.4

67.5

43

Vellore Institute of Technology

Vellore

P

20.3

16.9

09.8

10.1

10.3

67.4

44

Coimbatore Institute of Technology

Coimbatore

G

20.4

13.0

10.8

12.2

10.9

67.3

45

SSN College of Engineering

Chennai

P

21.4

12.7

11.3

11.2

10.6

67.2

46

IIIT

Allahabad

G

19.2

13.6

12.0

10.5

11.8

67.1

47

College of Engineering

Trivandrum

G

19.3

16.1

08.9

09.4

13.3

67.0

48

NIT Durgapur

Durgapur

G

20.5

12.4

11.3

10.7

12.0

66.9

49

SIT

Calcutta

G

22.9

13.4

10.1

08.9

11.5

66.8

50

Mumbai University Inst of Chemical Tech

Mumbai

G

20.2

12.5

11.4

10.0

12.6

66.7

51

Sardar Patel College of Engineering

Mumbai

p

20.1

12.7

10.2

10.4

13.2

66.6

52

P.E.S. Institute of Technology

Bangalore

p

19.5

13.1

11.0

11.7

11.0

66.3

53

Maharashtra Institute of Technology

Pune

p

20.3

13.4

10.0

10.2

12.3

66.2

54

Amrita Institute of Technology & Science

Coimbatore

p

19.8

12.2

12.1

10.5

11.5

66.1

55

National Institute of Engineering

Mysore

p

19.6

11.9

12.0

10.2

12.2

65.9

56

B.M.S. College of Engineering

Bangalore

p

19.7

13.1

10.9

09.6

12.3

65.6

57

Laxminarayan Institute Of Tech.

Nagpur

G

20.3

12.4

10.3

10.1

12.4

65.5

58

Nirma Institute of Technology

Ahmedabad

p

19.3

13.9

10.2

10.0

12.0

65.4

59

IIIT

Pune

G

19.4

12.6

10.2

10.3

12.7

65.2

60

Amity School of Engineering

Noida

p

19.7

13.5

09.3

10.1

12.5

65.1

61

JNTU

Kakinada

G

19.8

12.9

09.8

10.1

12.4

65.1

62

S.J. College of Engineering

Mysore

P

19.7

12.8

10.8

09.4

11.9

64.6

63

Chaitanya Bharathi Inst. of Technology

Hyderabad

P

19.3

13.3

09.8

09.2

12.9

64.5

64

IIIT

Bangalore

G

19.0

11.6

12.1

10.7

10.9

64.3

65

SRM Institute of Science and Technology

Chennai

P

21.0

12.4

09.3

08.4

13.1

64.2

66

SASTRA

Thanjavur

P

18.5

13.2

12.0

10.3

10.1

64.1

67

Bangalore Institute of Technology

Bangalore

P

19.5

11.8

10.5

10.2

12.0

64.0

68

The Technological Inst. of Textile & Sciences

Bhiwani

G

19.7

12.9

11.3

09.3

10.7

63.9

69

IIIT

Gwalior

G

19.7

12.7

10.2

10.3

10.9

63.8

70

JNTU

Anantpur

G

18.9

12.4

11.3

09.0

11.8

63.4

71

M.S. Ramaiah Institute of Technology

Bangalore

P

18.7

14.2

10.1

08.7

11.5

63.2

72

Gitam

Vishakhapatnam

P

19.2

14.8

10.6

06.2

12.3

63.1

73

NIT

Hamirpur

G

18.3

14.8

09.7

07.9

12.2

62.9

74

NIT

Jalandhar

G

19.6

12.7

09.3

09.1

12.2

62.8

75

SV University Engineering College

Tirupati

G

19.8

11.5

10.3

10.1

10.7

62.4

76

NIT

Raipur

G

18.7

13.1

09.6

09.1

11.8

62.3

77

Vasavi College of Engineering

Hyderabad

P

19.6

14.1

09.6

07.1

11.8

62.2

78

The ICFAI Inst of Science and Technology

Hyderabad

P

20.5

08.4

11.9

11.6

09.7

62.1

79

NIT

Patna

G

19.7

12.2

10.7

09.2

10.2

62.0

80

Cummins College of Engg for Women

Pune

G

20.1

08.7

11.7

11.3

10.1

61.9

81

VIT

Pune

P

17.9

11.2

11.7

10.0

10.5

61.3

82

Shri Ramdeo Baba K.N. Engineering College

Nagpur

P

18.7

13.3

10.4

08.2

09.7

60.3

83

Muffakham Jah Engineering College

Hyderabad

P

17.1

12.2

08.1

10.2

12.4

60.0

84

Karunya Institute of Technology

Coimbatore

P

18.1

12.1

08.9

08.4

12.3

59.8

85

D.J. Sanghvi

Mumbai

P

18.2

12.9

08.1

09.5

11.0

59.7

86

Sathyabhama Engineering College

Chennai

P

17.6

12.4

09.5

08.2

11.8

59.5

87

Kongu Engineering College

Erode

P

17.8

12.7

09.3

08.5

11.2

59.4

88

Mepco Schlenk Engineering College

Sivakasi

P

17.5

13.8

08.7

08.5

10.8

59.3

89

Guru Nanak Dev Engineering College

Ludhiana

G

17.7

12.4

08.6

08.8

11.6

59.1

90

Hindustan Inst of Engineering Technology

Chennai

P

18.9

11.3

09.2

09.3

10.2

58.9

91

SDM College of Engineering

Dharwad

P

16.5

12.7

08.0

09.6

11.7

58.5

92

R.V.R. & J.C. College Of Engg

Guntur

P

16.8

12.1

09.6

08.7

11.2

58.4

93

Jamia Millia Islamia, New Delhi

New Delhi

G

19.8

10.2

08.8

08.7

10.8

58.3

94

K.L. College of Engineering

Veddeswaram

P

17.8

12.8

09.4

07.5

10.7

58.2

95

Dharmsinh Desai Institute of Technology

Nadiad

P

16.1

12.1

10.3

09.1

10.1

57.7

96

S.G.S. Institute of Technology & Science

Indore

G

16.1

11.3

09.8

09.5

10.3

57.0

97

Jabalpur Engineering College

Jabalpur

G

15.9

12.5

08.2

08.5

11.8

56.9

98

Sree Chitra Thirunal College of Engineering

Trivandrum

P

15.5

12.5

07.9

08.7

09.9

54.5

99

G.H. Patel College of Engg & Technology

Vallabh Vidyanagar

G

15.1

12.8

09.5

07.4

09.6

54.4

100

Kalinga Institute of Industrial Technology

Bhubaneshwar

P

14.9

12.9

08.1

08.5

09.8

54.2


Source:
The Outlook (I guess!)
But its from a very famouse National Magazine.
--
--~--~---------~--~----~------------~-------~--~----~
The world is a tragedy for those who feel and a comedy for those who think!
--~--~---------~--~----~------------~-------~--~----~

T his blog is my tribute to Rachit, Unreal, Sunny, MHO, PCWorld, ABC, Funonnet, MMZ, Hangyo, etc!!!! The contents of the site are not original......but taken from the e-mails belonging to the names given above and many others for whom I wasn't able to keep a track. So if U like any of the posting......all credits goes to them!


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