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Ethics in Action The world's largest conference for hackers, DEF CON, is held each year in Las Vegas. Attendees include experts in the fields of programming, computer security, and law enforcement. Members of Hackers for Planet Earth (HOPE), the Chaos Computer Club (CCC), and the Hacktic Network promote ethical hacking to develop software that increases freedom of expression. Visit these hackers' Web sites and read about their conferences and pursuits. Which topics do they discuss in their forums? Who are considered "true hackers"? Should some hackers be exonerated if their efforts are done with a greater purpose, such as furthering a political concern? Write a report summarizing your findings, and include a table of links to Web sites that provide additional details about hackers.
calculate the vortexshedding frequency and the distance between two shedding cycles. If the intention is to have the same frequency as in full scale, then what is the desirable air speed in the wind tunnel?
pole a whose coordinates are 20 degree n 50 degree e is to be rotated about the axes described below. in each case find
n air compressor operates at steady state with air entering at p1 1 bar t1 17 c and exiting at p2 5 bar. the air
two site are being considered for wind power generation. in the first site the wind blows steadily at 7 ms for 3000
a converging diverging nozzle undergoes isentropic flow. stagnation pressure and stagnation temperature is 500 kpa and
A wind turbine with a diameter of 100 ft operates during a 24-h period in which the wind velocity may be approximated by half a sine wave as V(theta)=V(m)sin(pi*theta/24), where theta is time in hours and V(m)= 10^5 ft/h. The wind density is 0.076 l..
Establish the similarity requirements and prediction equation for a model to be used in the wind tunnel to study the air velocity, V, around the locomotive.
The fin tapers from a thickness of 5 mm to a thickness of 2 mm at the tip. The thermal conductivity of the material of the fin is 100 W/m °C.
What is the difference between corrosion and stress corrosion cracking of pipelines? Which of them is more dangerous and why?
A simplified model of a petroleum pump is shown in Fig. 1.99, where the rotary motion of the crank is converted to the reciprocating motion of the piston. Find the equivalent mass, meq of the system at location A.
consider a l0-plate fuel cell stack at an anode stoichiometry of 1.2 with 20 a current generated in the stack and a
how does the total free energy for transformation ?gtotal vary for a liquid-solid transformation versus that for a
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