What is the feasibility of using hydrogen energy instead of fossil fuel to meet the rising global demands? What is the potential of biohydrogen as a source of energy?

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CAN HYDROGEN BE THE SOLUTION TO THE WORLDS GROWING ENERGY DEMAND?

What is the feasibility of using hydrogen energy instead of fossil fuel to meet the rising global demands?
• What is the potential of biohydrogen as a source of energy?
• What is the near future perspective of hydrogen energy?
• Is hydrogen fuel cell technology viable economically?

Evaluate online tutorials and online communities in regard to helping users. Create an argument for the approach you find to be the most effective and explain why. 

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Week 8 Discussion

Respond to the following:
Evaluate online tutorials and online communities in regard to helping users. Create an argument for the approach you find to be the most effective and explain why.

What is the feasibility of using hydrogen energy instead of fossil fuel to meet the rising global demands? What is the potential of biohydrogen as a source of energy?

/in /by

CAN HYDROGEN BE THE SOLUTION TO THE WORLDS GROWING ENERGY DEMAND?

What is the feasibility of using hydrogen energy instead of fossil fuel to meet the rising global demands?
• What is the potential of biohydrogen as a source of energy?
• What is the near future perspective of hydrogen energy?
• Is hydrogen fuel cell technology viable economically?

Determine the smallest safe diameter for the two shafts using the ASME design code for transmission shafts. Calculate the dimensions of the keys and the keyways at shaft 1 and 2 for the two gears and the pulleys.

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Shaft Design

Determine the smallest safe diameter for the two shafts using the ASME design code for transmission shafts.
Calculate the dimensions of the keys and the keyways at shaft 1 and 2 for the two gears and the pulleys.
Calculate the critical speed of rotation for shaft 2.
Prepare the construction drawings of the device.
Design the full 3D part and two different cress sections.

What, according to Twenge, are the defining characteristics of iGen, her term for the generation born between 1995 and 2012? Why, in her view, is this generation so unhappy?

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Have Smartphones Destroyed a Generation

In a five-paragraph (minimum) essay, answer the question below. A successful essay will have a clear thesis supported by specific examples, as well as a minimum of three relevant quotes and correct MLA citations from the article.

Article: “Have Smartphones Destroyed a Generation?” by Jean M. Twenge (page 343 of the e-reader).

Question:

What, according to Twenge, are the defining characteristics of iGen, her term for the generation born between 1995 and 2012? Why, in her view, is this generation so unhappy?

What is the feasibility of using hydrogen energy instead of fossil fuel to meet the rising global demands? What is the potential of biohydrogen as a source of energy? What is the near future perspective of hydrogen energy?

/in /by

CAN HYDROGEN BE THE SOLUTION TO THE WORLDS GROWING ENERGY DEMAND?

What is the feasibility of using hydrogen energy instead of fossil fuel to meet the rising global demands?
• What is the potential of biohydrogen as a source of energy?
• What is the near future perspective of hydrogen energy?
• Is hydrogen fuel cell technology viable economically?

Discuss strategies to ensure integrated, coordinated error messages that are consistent across an application. 

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Error Messages

Respond to the following:
Error messages are a key part of an overall interface design strategy of guidance for the user. Discuss strategies to ensure integrated, coordinated error messages that are consistent across an application.

Identify at least two advantages and two disadvantages of having touch screen devices in the workplace. Support your response by citing a quality resource.

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Touch Screen Devices

Respond to the following:
Touch screens are becoming extremely popular input devices for phones and tablets. Assess the value of touch screen devices related to human-computer interaction systems. Identify at least two advantages and two disadvantages of having touch screen devices in the workplace. Support your response by citing a quality resource.

If Hepting v. AT&T results in “Big Brother” being allowed to eavesdrop and/or review the local and toll telephone dialing and bills of individuals, will U.S. citizens and consumers have any privacy rights left regarding use of communication technologies?

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EFF Case Study Information

The Electronic Frontier Foundation (EFF) filed a class-action lawsuit against AT&T on January 31, 2006, accusing the telecom giant of violating the law and the privacy of its customers by collaborating with the National Security Agency (NSA) in its massive, illegal program to wiretap and data-mine Americans’ communications. In May 2006, many other cases were filed against a variety of telecommunications companies. Subsequently, the Multi-District Litigation Panel of the federal courts transferred approximately 40 cases to the Northern District of California federal court.

In Hepting v. AT&T, EFF sued the telecommunications giant on behalf of its customers for violating privacy law by collaborating with the NSA in the massive, illegal program to wiretap and data-mine Americans’ communications. Evidence in the case includes
undisputed evidence provided by former AT&T telecommunications technician Mark Klein showing AT&T routed copies of Internet traffic to a secret room in San Francisco controlled by the NSA.

In June of 2009, a federal judge dismissed Hepting and dozens of other lawsuits against telecoms, ruling that the companies had immunity from liability under the controversial Foreign Intelligence Surveillance Act Amendments Act (FISAAA), which was enacted in response to court victories in Hepting. Signed by President Bush in 2008, the FISAAA allows the attorney general to require the dismissal of the lawsuits over the telecoms’ participation in the warrantless surveillance program if the government secretly certifies to the court that the surveillance did not occur, was legal, or was authorized by the president—certification that was filed in September of 2008.

Posting:

Why is the Hepting v. AT&T case crucial to the long-term posture of how the U.S. government can or cannot review consumer confidential information?
If Hepting v. AT&T results in “Big Brother” being allowed to eavesdrop and/or review the local and toll telephone dialing and bills of individuals, will U.S. citizens and consumers have any privacy rights left regarding use of communication technologies?
What are the information systems security implications of consumer information being shared?

Calculate the smallest safe shaft diameter for the shaft 1 and 2. Provide a free body diagram and all necessary bending moments and torque diagrams. Calculate the dimensions of the keys and the key ways at shaft 1 and 2 for the two gears and the pulleys.

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Shaft Design


Figure 1 shows a simple gear box with various machine elements and components. Shaft No. 2 is rotating through gears by shaft No. 1 which is rotating through two pulleys by an electric motor. The transmission shaft No. 1 stands on two bearings and the rotational speed is transfer by the belt. The two shafts are made of hot–rolled alloy steel with yield strength σy= 500 MPa and σuts= 1200 MPa. The belt transmits (a) 14,7KW of power at (b) 1700 rpm. The belt is prestressed with a ration of (c) 2,05 The two gears are spur gears with 20ο pressure angle. The bearing distance for the shaft 1 is (d) L1= 420 mm and for the shaft 2 is (e) L2= 260 mm. The output pulley has to be design for (f) Nb= 2 number of belts. For both shaft the safety factor is (g) SF= 3,3
– Data for each student: (a/a 64.)
Α. CALCULATIONS

1. Calculate the smallest safe shaft diameter for the shaft 1 and 2. Provide a free body diagram and all necessary bending moments and torque diagrams.
2. Calculate the dimensions of the keys and the key ways at shaft 1 and 2 for the two gears and the pulleys.
3. Determine the critical speed of rotating shaft 2.

B. DRAWINGS AND ASSEMBLY

1. Make the construction drawings of all different parts (2D)
2. Design the two shafts (shaft 1 and shaft 2 ) with all components and explain in details and explain in details how to make the assembly (assembly manual).
3. Design two different cross sections of the device with all components (2D).
4. Design the gear box with all components in 3D.