Mechanical Engineering club

me_ai

Scientist

Sir Isaac Newton

Optics


From 1670 to 1672, Newton lectured on optics. During this period he investigated the refraction of light, demonstrating that a prism could decompose white light into a spectrum of colours, and that a lens and a second prism could recompose the multicoloured spectrum into white light.

He also showed that the coloured light does not change its properties by separating out a coloured beam and shining it on various objects. Newton noted that regardless of whether it was reflected or scattered or transmitted, it stayed the same colour. Thus, he observed that colour is the result of objects interacting with already-coloured light rather than objects generating the colour themselves. This is known as Newton's theory of colour.

Mechanics and gravitation



In this work Newton stated the three universal laws of motion that were not to be improved upon for more than two hundred years. He used the Latin word gravitas (weight) for the effect that would become known as gravity, and defined the law of universal gravitation. In the same work he presented the first analytical determination, based on Boyle's law, of the speed of sound in air.

Newton's Apple



“        In the year 1666 he retired again from Cambridge to his mother in Lincolnshire. Whilst he was pensively meandering in a garden it came into his thought that the power of gravity (which brought an apple from a tree to the ground) was not limited to a certain distance from earth, but that this power must extend much further than was usually thought. Why not as high as the Moon said he to himself & if so, that must influence her motion & perhaps retain her in her orbit, whereupon he fell a calculating what would be the effect of that supposition.[36]

taken from WIKIPEDIA
Isaac_Newton

me_ai

Scientist

Albert Einstein

Known for       
General relativity
Special relativity
Brownian motion
Photoelectric effect
Mass-energy equivalence
Einstein field equations
Unified Field Theory
Bose–Einstein statistics
EPR paradox

Notable prizes         :Nobel Prize in Physics (1921)

Annus Mirabilis

In 1905, while he was working in the patent office, Einstein had four papers published in the Annalen der Physik, the leading German physics journal. These are the papers that history has come to call the Annus Mirabilis Papers:

1 His paper on the particulate nature of light put forward the idea that certain experimental results, notably the photoelectric effect, could be simply understood from the postulate that light interacts with matter as discrete "packets" (quanta) of energy, an idea that had been introduced by Max Planck in 1900 as a purely mathematical manipulation, and which seemed to contradict contemporary wave theories of light.(Einstein 1905a) This was the only work of Einstein's that he himself called "revolutionary."

2 His paper on Brownian motion explained the random movement of very small objects as direct evidence of molecular action, thus supporting the atomic theory. (Einstein 1905c)

3 His paper on the electrodynamics of moving bodies introduced the radical theory of special relativity, which showed that the observed independence of the speed of light on the observer's state of motion required fundamental changes to the notion of simultaneity. Consequences of this include the time-space frame of a moving body slowing down and contracting (in the direction of motion) relative to the frame of the observer. This paper also argued that the idea of a luminiferous aether—one of the leading theoretical entities in physics at the time—was superfluous. (Einstein 1905d)

4 In his paper on the equivalence of matter and energy (previously considered to be distinct concepts), Einstein deduced from his equations of special relativity what later became the well known expression: E = mc2, suggesting that tiny amounts of mass could be converted into huge amounts of energy. (Einstein 1905e)

Light and general relativity



During 1909, Einstein published "躡er die Entwicklung unserer Anschauungen 黚er das Wesen und die Konstitution der Strahlung" ("The Development of Our Views on the Composition and Essence of Radiation"), on the quantization of light. In this and in an earlier 1909 paper, Einstein showed that Max Planck's energy quanta must have well-defined momenta and act in some respects as independent, point-like particles. This paper introduced the photon concept (although the term itself was introduced by Gilbert N. Lewis in 1926) and inspired the notion of wave–particle duality in quantum mechanics.

owever, in May 1919, a team led by British astronomer Arthur Stanley Eddington claimed to have confirmed Einstein's prediction of gravitational deflection of starlight by the Sun while photographing a solar eclipse in Sobral northern Brazil and Principe.[29] On November 7, 1919, leading British newspaper The Times printed a banner headline that read: "Revolution in Science – New Theory of the Universe – Newtonian Ideas Overthrown"

taken from WIKIPEDIA
Einstein

me_ai

Nikola Tesla

Tesla is best known for his many revolutionary contributions to the discipline of electricity and magnetism in the late 19th and early 20th century. Tesla's patents and theoretical work formed the basis of modern alternating current electric power (AC) systems, including the polyphase power distribution systems and the AC motor, with which he helped usher in the Second Industrial Revolution.

Colorado Springs
Main article: Magnifying transmitter



Tesla researched ways to transmit power and energy wirelessly over long distances (via transverse waves, to a lesser extent, and, more readily, longitudinal waves). He transmitted extremely low frequencies through the ground as well as between the earth's surface and the Kennelly-Heaviside layer.

Tesla's demonstrations were written about widely through various media outlets. Tesla also investigated harvesting energy that is present throughout space. He believed that it was just merely a question of time when men will succeed in attaching their machinery to the very wheelwork of nature, stating:“        Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe.        ”

Field theories

When he was eighty-one, Tesla stated he had completed a dynamic theory of gravity. He stated that it was "worked out in all details" and that he hoped to soon give it to the world.[67] The theory was never published. At the time of his announcement, it was considered by the scientific establishment to exceed the bounds of reason. Some believe that Tesla never fully developed the Unified Field Theory.

The bulk of the theory was developed between 1892 and 1894, during the period that he was conducting experiments with high frequency and high potential electromagnetism and patenting devices for their utilization. It was completed, according to Tesla, by the end of the 1930s. Tesla's theory explained gravity using electrodynamics consisting of transverse waves (to a lesser extent) and longitudinal waves (for the majority). Reminiscent of Mach's principle, Tesla stated in 1925 that:

Nikola Tesla, with Rudjer Boscovich's book Theoria Philosophiae Naturalis, sits in front of the spiral coil of his high-frequency transformer at East Houston Street, New York.“        There is no thing endowed with life - from man, who is enslaving the elements, to the nimblest creature - in all this world that does not sway in its turn. Whenever action is born from force, though it be infinitesimal, the cosmic balance is upset and the universal motion results.        ”


Tesla was critical of Einstein's relativity work, calling it:“        ...[a] magnificent mathematical garb which fascinates, dazzles and makes people blind to the underlying errors. The theory is like a beggar clothed in purple whom ignorant people take for a king..., its exponents are brilliant men but they are metaphysicists rather than scientists...[68]        ”


Tesla also argued:“        I hold that space cannot be curved, for the simple reason that it can have no properties. It might as well be said that God has properties. He has not, but only attributes and these are of our own making. Of properties we can only speak when dealing with matter filling the space. To say that in the presence of large bodies space becomes curved is equivalent to stating that something can act upon nothing. I, for one, refuse to subscribe to such a view.[69]        ”


Tesla, also believed that much of Albert Einstein's relativity theory had already been proposed by Ruđer Bošković, stating in an unpublished interview:“        ...the relativity theory, by the way, is much older than its present proponents. It was advanced over 200 years ago by my illustrious countryman Ruđer Bošković, the great philosopher, who, not withstanding other and multifold obligations, wrote a thousand volumes of excellent literature on a vast variety of subjects. Bošković dealt with relativity, including the so-called time-space continuum...'.[70]


taken from WIKIPEDIA
Nikola_tesla

wei_loon5063

i`ve heard an interesting story..........

engineers are professional to right? but why many people like to challenjge engineers? like why u deign like this? i thjis the best? even customers

but..... customer dont challenge doctors..

why u give me this medicine? is this the best?
dr once ask me to buy medicine from her... but i say is this the best? my friend` dr ask him to take other supplemenjt...

i just tanya out of curiosity laa... the dr then pis off.. say"all i can say i said.. listen or not is up to you"

=,=
same to lawyers too....

why??

mfr892005

hai every one...i wish i could be like yours,,mechanical engineer
i have some question
can graduate grade from local University in malaysia get job at oversea
right now i am studying at uitm

zul888

halo,juz wannw ask,job scope for mechanical n luas x?

byk x keje afta grade nnt?

animaniac

Originally posted by zul888 at 9-5-2009 00:07
halo,juz wannw ask,job scope for mechanical n luas x?

byk x keje afta grade nnt?

job scope mmg luas...boleh masuk automation, automotif, aeronautic, metallurgical, corrosion control, oil and gas, engineering economy, industrial engineer, planner dll lagi..

animaniac

Originally posted by mfr892005 at 5-5-2009 20:38
hai every one...i wish i could be like yours,,mechanical engineer
i have some question
can graduate grade from local University in malaysia get job at oversea
right now i am studying at uitm

yup local graduate can get job from oversea, but it depends on which country u want to work? For a freshie, try to get xpirience from country like Sudan, Nigeria, Turkmenistan then when u get ur xpirience try to apply at established country ;)

kicaptigaayam

hello semua....

saya nak tanya few quest. and facts about working in mech department in M'sia.
-with current economy problems,masih ada banyak lagi tak position ffor fresh grads or maybe trainee programs? let say from now on until 1quarter of next year ?
-and kalau dapat keje adakah (big /small ) companies offers master studies (parallel) ?

btw, saya nih student kat europe,dan akan habis by oktober nih.now is not the best time to work here ( in europe) ,and very very very difficult utk cari keje even nak jadi pencacai pon susah , sampai bila pon tak sure.so I am keeping my options open.

am very glad if somebody can help me. thankssss a lot

pudifro

nak tanye nie,,
x thu ler kalo aku nie off topic..sori la ek
aku nie student uia 1st year..
next week dah kene isi form utk majoring..tp aku still confuse nak pilih mane satu..
dalam kepala aku ada 3 pilihan..manufacturing..automotive..aerospace..
aku nie suka ngn subjek statics n dynamics tp sgt2 lemah dalam subjek pragramming..
aku tnye senior psl hal2 majoring..diorang ckp kene choose base on ability bkannye minat..
tp aku x ksh mane2 pon asal senang nk cari keje esok2..hahah
so rasa2 korang la ek..mane satu aku patot pilih??
harap2 sgt dpt membantu..

animaniac

nak tanye nie,,
x thu ler kalo aku nie off topic..sori la ek
aku nie student uia 1st year..
next week dah kene isi form utk majoring..tp aku still confuse nak pilih mane satu..
dalam kepala aku ad ...
pudifro Post at 9-1-2010 13:54

ambik pure mechanical ... diverse sikit. senang nak masuk2 mana bidang bila dah graduate

me_ai

kalau cabangnya 3....
manufacturing adalah paling diverse...since any industry with manufacturing base will require eng...like..process, control, analysis,

automotif...kita baru nak berkembang...biasanya dominate by japan grads..

aerospace....peringkat awal....cabang paling menonjol....satelit...and baru2 ni...dikembangkan dgn...inisiatif kerajaan dgn beri lebih peluang utk kembangkan industri aeronautik...

mahluk_halus

i pon nak join klub ni....

i ada degree in mechanical engineering
majoring in system engineering

rasa mcm nak sambung master
tp cgap tu mcm kurenggggg...
work experience pon kureng 2 taun

agak2 U mana nak enrol org mcm kita...?

animaniac

i pon nak join klub ni....

i ada degree in mechanical engineering
majoring in system engineering

rasa mcm nak sambung master
tp cgap tu mcm kurenggggg...
work experience pon kureng 2 taun

...
mahluk_halus Post at 3-2-2010 21:37

kalau berminat nak jadi pensyarah..ko enroll la , tak salah aku utk buat master in Mechanical, kalau CGPA kurang, ko kena keja 2 tawon dulu.. kalau ko rajin publish la apa2 paper pasal system tu , buat kajian sendiri , buat 2 - 3 topic la , lepas tu try publish kat international community , bila diaorang dah accept and notify ko punya keja tu, pi la kat mana2 Universiti tunjuk and cakap ko nak buat master , ini aku agak 2 je la...

tapi buat apa buat master baik ko buat PE dgn BEM , lagi gempak ;)

cempro81

want to ask
anyone know about heat transfer program
need soem help to calculate the heat transfer for air cond 24 hours

sixfor

want to ask
anyone know about heat transfer program
need soem help to calculate the heat transfer for air cond 24 hours
cempro81 Post at 29-3-2010 17:20

try pakai ansys, rasanya ada feature tu, sbb pernah ternampak

http://www.ansys.com/industries/heat-transfer.asp

software ni pandai2 la cari sendiri