CSI – IMPOSSIBLE TO ESCAPE February 11, 2008
Posted by arun in TV shows, biology, chemistry, entertainment, math, physics, science, technology.Tags: crime, crime scene investigation, CSI, DNA, drama, evidence, finger print, gil grissom, investigation, las vegas, mac taylor, new york, scene, suspect, technology, thriller, tv-show
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CSI, Crime Scene Investigation, as many of you might already know, is one of the best featured TV-shows
of its genre, Crime/Drama/Thriller. It comes in three flavors, CSI – Las Vegas, New York and Miami. I have seen only a couple of episodes in Miami, up-to-date on Las Vegas and catching up on New York. Las Vegas was the first and arguably the best, this bias may be because I saw it first. Usually the show consists of a team of 5-6 CSIs. The distinction that sets this show apart is its uniqueness in handling crime scenes by relying only on evidence. Gil Grissom, the head in Las Vegas and Mac Taylor in New York, whose characters are understood to be complex but personable with distinguished intuitiveness and acumen, and immaculate rationality. They don’t connive to violations of law nor do they truckle to threats. In this 1 hour featured show, it doesn’t always result in solving 1 or more crimes within the period. At times, it gets personal putting the lives of CSIs themselves into jeopardy.
The CSI characters each are developed in an unique and exquisite manner with each having their own issues, dark periods, test of endurance, flash backs etc… The show uses state of the art technology in addition to intricate attention to details, in particular, it has a keen inclination towards microscopic particles, fibres and glasses. It deals with numerous fields covering almost all aspects of science and arts which begs the question regarding the voluminous and universal knowledge the CSI team possesses. The show also uses a lot of technical expressions (a result from an analysis or experiment) which remains gobbledygook to one with limited or no knowledge in that field. One thing, if I understood from this show is that, a dead body speaks more than the one alive!
From the multitude of episodes, you will be caught no matter how intelligently you plan the crime. Why? Because you have no freaking clue of how many things are unique!! There is no perfect crime!
But at times, clues in context to technology related to electronics/computers which is my area of expertise relatively in opposition to say, biology, I find them ridiculous and funny (not always). For exam
ple, in CSI – New York, Season 03, Episode 02, a man is found dead in a jewelry store which is robbed by 3 women clad in same outfit and hard to distinguish between. On analyzing the crime scene (where all the glasses are broken and jewels are looted), they come to know that, the broken glasses doesn’t have any stress marks indicating directionality (when you strike a glass, the broken glass shows a pattern denoting the direction of impact). From a witness in the crime scene who claimed that a dog barked just before the glass shattered, they discover that they used a “frequency device”. Now comes the funny part.
CSI(1): how could one do that?
CSI(2) A sine wave generator. It is a program that manipulates sound. You download the output to a mp3 player and you are ready.
CSI(1): ahan! Check all web sites. Anyone who deals with this kind of software. Cross check with the name “Beth”.CSI(2): (after some other scenes) The name you gave was good. A women by the name of Beth Lawson bought a sine wave generator program last month from an online distributor. It turns out there was no forwarding address in the package she ordered. The delivery man explained her as “one hot blondie” and she studies “physics” in college.
CSI(1): Beth was studying physics, Natalie was studying engineering…?!!
CSI(2): yes, both indulging in homicide!
I know! People from engineering background, I need not even explain this. You are already ROTFL. The concept is very true, using high frequency vibration, you could break a glass. But, for a student studying in engineering and physics, writing their own code of a sine wave “program” will take less than 10 seconds rather than placing an online order!! OMG! cracking the case with an online order for a sine wave program purchased by engineering students… it must be a real dull college.
There may be some similar technicalities in other fields too. Otherwise, the show is wondrous, one of a kind. Awe striking graphics & animation, good continuity, the reality in posing the dead bodies, the action, car chases, bomb blasts, internal story line, very little provocative content, character development, technology etc… are inexplicable. Also the details they analyze including finger prints, DNA, blood spatter, fibre particles, glass particles, even sand, paints, acids and drug tests, bugs, weapons including guns for their mm calibers and other instruments resulting in death by stabbing. Anything and everything on the Earth is analyzed!!
Its therefore impossible to escape… BEWARE!
HELIUM, TIMBRE & DONALD DUCKS December 19, 2007
Posted by arun in physics, science, technology.Tags: helium, physics, science, voice
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So, how are these terms associated with one another? The gist is that inhaling Helium makes one sound like a Donald Duck. How? It is a well known fact that sound requires a medium to travel. Under normal circumstances, the composition of air in the larynx is in normal proportions and when the vocal cord starts to vibrate, the skin compresses accordingly creating sound waves. The frequency depends on the number of compressions. However, when one injects helium, which is about 1/7th of the density of nitrogen, creates a difference in the density, changing the composition of air in one’s larynx. Because the frequency of vibration of vocal cords is independent of the medium, and pitch of a tone depends on frequency, there is no change in the pitch of the voice. However, the velocity of sound waves changes because of the difference in the medium and affects the timbre of the tone. This results in the speech or voice sounding more like a Donald Duck!!
EMBARK UPON THE BLUE RAY & HD DVDs December 16, 2007
Posted by arun in entertainment, physics, science, technology.Tags: computers, physics, technology
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I have always had a particular jones towards technology, which has aggrandized since my dad bought my first computer with 166 MHz Intel processor and 32 MB RAM configuration. In fact, it has even influenced to a great extent in pursuing my under graduation studies too. I could not help but get fascinated by these next generation optical drives and whet my appetite to contribute significantly. Here is a piece of information to the likewise ardent admirers of technology!!
Physics and Technology: Blue ray acquires its name from the blue-violet laser technology, although HD DVDs also use the low wavelength blue lasers. How does this really make a difference increasing the storage size by about 4 to 6 fold? A Blue-ray disc has around 25GB of storage capacity where as HD DVDs have about 15 GB, on comparison to a 4.7 GB DVD disc. Understanding HOW requires, if not comprehensive, a glancing purview of how optical drives typically work. In optical drives, the digital information is usually encoded in the pattern of pits of varying lengths. The laser beam in the drive is excited on to these information layers and a photo diode collects the reflected light (the pits reflect less light than the adjacent layers). However, it is imperative to agnize that the lens (focusing the laser beam) produces a finite diameter owing to diffraction. So, the pits must be separated by the distance demanded by the diffraction of the light wavelength in order for the data reading to be efficient. This ultimately decides the size of the optical storage disc. By using shorter wavelengths, the spot size for reading pits can be reduced which results in many pits at relatively small distances separating each other, hence the tremendous increase in the size!! To quantify, the pit length has decreased in CD, DVD, HD DVD and blue-ray as 0.8, 0.4, 0.2 and 0.15 micrometers. To physics fanatics, refer 1 and 2.
Does this really make a difference? There is of course increase in the resolution obtained, however, not as high as the resolution obtained as in the case of say, a video-tape to DVD era. Before clambering up the bandwagon, it is essential to know, the technology of the drives demand equal display resolutions from TV or computer displays to bring the best out of it. The maximum resolution of the best displays is about 1080p (progressive scan) > 1080i (interlaced). Blue-ray players typically demand a 1080p resolution whereas HDTV (TV shows) are broadcast at 1080i or 720p. So, watching them on a 1080p TV makes no difference!
It is surprising as to how much increase in the storage capacity can be obtained from basic physics learnt at the level of high-school, Huygens’ wave theory (to those who were taught properly!! I owe it to Mahalakshmi teacher
).