Despite years of research into human computer interaction (HCI), the environments programmers must use for problem-solving today—with separate modes and tools for writing, compiling, testing, visualizing, and debugging— derive their basic structure from historical accident, and take little advantage of HCI research into the cognitive issues of programming. Neglecting these issues is an impedime...

One often hears: " If time travel were possible, I would go back in time and kill Hitler, and save millions of lives. " But little thought has been given to the more general background issues surrounding this kind of claim: if time travel were possible, what sorts

Nowadays air travel is one of the most popular traveling as its advantages. A disabled should commute easily, so Facilitation of air traveling is vital. A disabled needs various services which depends on travel steps. These needs should have supported by travel agencies and airport staffs. Therefore, planners must be considering not only physical environment but also well services. This paper i...