Ac 2007-1986: Increasing It Laboratory Flexibility Using Portable Hard Drives

نویسندگان

  • Michael Bailey
  • Michael Moore
  • Brigham Young
  • Joseph Ekstrom
چکیده

IT students have unique workstation requirements that include complete control of a computer and its configuration, resulting in setups that are often incompatible with other uses of the lab. For example, the system integration and administration thrusts of the IT curricula require that a student be trained week after week on his own system, with his own software installation, configuration and log files. However, few institutions can afford space and hardware to provide students with individual systems. Possible solutions include requiring students to own laptops, creating individual virtual servers on a powerful hardware system, or more recently, to use portable hard drives. The use of small, portable hard drives for dedicated system instruction was tested this year in a Web-systems course. Students in a study group were provided with portable drives and a second (control) group had notebook computers with large drives, a partition of which was dedicated to the IT coursework. The students compared these options in terms of speed, reliability, ease of use, and in the case of the drives, portability between host computers. Other comparisons such as weight and cost are readily apparent, but were evaluated according to their importance to the students. The study found that portable hard drives are an effective compromise between cost, flexible lab use, and performance.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Non-Sinusoidal Reference Wave for Pwm Ac Drives

In this paper we propose a suitable reference wave for Pulse Width Modulation (PWM) AC Drives. Staircase reference waves whose levels are calculated to eliminate certain harmonics are studied and a certain staircase reference waveform with L levels is constructed. When L is made very large in limit, this staircase waveform approaches a continuous one which is called Quasine (Quasi + Sine). This...

متن کامل

Chapter 15 AC Motor Speed Control

An important factor in industrial progress during the past five decades has been the increasing sophistication of factory automation which has improved productivity manyfold. Manufacturing lines typically involve a variety of variable speed motor drives which serve to power conveyor belts, robot arms, overhead cranes, steel process lines, paper mills, and plastic and fiber processing lines to n...

متن کامل

Dielectric nonlinearity of relaxor ferroelectric ceramics at low ac drives

Dielectric nonlinear response of (PbMg1/3Nb2/3O3)0.9(PbTiO3)0.1 (0.9PMN0.1PT) relaxor ceramics was investigated under different ac drive voltages. It was observed that: (i) the dielectric permittivity is independent on ac field amplitude at high temperatures; (ii) with increasing ac drive, the permittivity maximum increases, and the temperature of the maximum shifts to lower temperature; (iii) ...

متن کامل

A minimum-time control strategy for torque tracking in permanent magnet AC motor drives

A minimum-time torque control strategy for permanent-magnet ac motor drives is presented. The proposed solution is obtained by an ad-hoc procedure based on the computation of reachability and controllability sets which in turn requires solving iteratively a fourth-degree polynomial equation. For its efficient implementation an algorithm based on Sturm sequences is proposed. The algorithm has be...

متن کامل

AC-DC & DC-DC Converters for DC Motor Drives

This paper deals with a comprehensive survey on the topic of AC/DC & DC/DC converters for DC Motor Drives. A substantial number of different AC/DC and DC/DC topologies appropriate for DC motor drives are presented. This critical literature review brings out merits, demerits, and limitations besides giving the basic operating principles of various topologies. Keywords—controlled-rectifiers, chop...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007