Broadcasting     

Jeb H. Perry  Diana M. Meehan  Larry James Gianakos  James H. Duncan Jr.  Dan Blume 《Communication Booknotes Quarterly》2013,44(3-4):31-32

UNIVERSAL TELEVISION: THE STUDIO AND ITS PROGRAMS, 1950-1980, by Jeb H. Perry (1983, 499 pp.---$32.50)

LADIES OF THE EVENING: WOMEN CHARACTERS OF PRIME-TIME TELEVISION by Diana M. Meehan (1983, 202 pp.---$16.00)

TELEVISION DRAMA SERIES PROGRAMMING: A COMPREHENSIVE CHRONICLE, 1980-1982, by Larry James Gianakos (1983, 686 pp.---$45.00)

DUNCAN'S RADIO MARKET GUIDE by James H. Duncan, Jr. (Duncan Media Enterprises, P.O. Box 2966, Kalamazoo, MI 49003---$110, spiral bound)

MAKING IT IN RADIO by Dan Blume (Continental Media Company, 35 Forest Hills Lane, West Hartford, CT 06117---$9.95, paper)  相似文献   

Lunar spacecraft powered descent control using higher-order sliding mode techniques     

Jeb S. Orr  Yuri B. Shtessel 《Journal of The Franklin Institute》2012,349(2):476-492

Robust performance of a flight control system in the presence of parametric uncertainty and external disturbances is of paramount importance to a successful planetary exploration program. The present research is concerned with the design of an autopilot that uses high-order sliding mode (HOSM) control principles so as to enhance the robustness properties of a lunar landing vehicle during the approach phase of powered descent. The design technique is applied to a high-fidelity simulation of the Apollo Lunar Module (LM). The design efficiently utilizes both the reaction control system (RCS) actuators and the severely rate-limited gimbal drive actuator (GDA) to effect smooth detection and compensation of sensed angular acceleration disturbances about the vehicle's control axes. The integration of a HOSM control law for the RCS effectors with a HOSM disturbance observer is shown to provide performance comparable to that of the heritage autopilot and may also avoid some difficulties encountered in the Apollo flights. Performance is maintained with the controller implemented in discrete time in the presence of a realistic vehicle and sensor model, demonstrating a unique application of sliding mode control to a complex aerospace system.  相似文献   

Keyboarding compared with handwriting on a high-stakes writing assessment: Student choice of composing medium, raters’ perceptions, and text quality     

Carl  Scott B.  Jeb   《Assessing Writing》2008,13(1):4-25

This article examines the influence of keyboarding versus handwriting in a high-stakes writing assessment. Conclusions are based on data collected from a pilot project to move Old Dominion University's Exit Exam of Writing Proficiency from a handwritten format into a dual-option format (i.e., the students may choose to handwrite or keyboard the exam). This test case is used to demonstrate the complex implications for a writing assessment tool when universities aim to accommodate students’ various methods of physically creating a text. Discussion includes speculation about the format of the writing component on the SAT. It is argued that by analyzing the differences in high-stakes exams when students keyboard and when they handwrite, researchers can better understand how the material conditions for composing influence students and raters. It is concluded that if handwriting and keyboarding represent even slightly different composing skills and cognitive processes, then high-stakes writing assessments should aim to accommodate students by providing methods of textual production with which students are most comfortable, even as this accommodation produces new challenges for the creators and managers of large-scale writing assessments.  相似文献