Reviewing domestic related researches about dialogue, most of them focused on its effectiveness. This research focused on how to facilitate the learning of dialouge. We firstly reviewed the references about ¡§learning¡¨ and ¡§dialogue¡¨; and then described the action research process of how Systems Thinking and Organizational Lab designed the feedback mechanisms to facilite the learning process on dialogue for Company A. We also analyzed every feedback mechanisms about its effectiveness in this research. We found out that feedback mechanisms can facilitate the learning process on dialogue, and the reflective abiliy of the members is very important. Besides we could adopt different feedback mechanism to facilitate the learning effectiveness depending on the situation; therefore, we also made several suggestions on every feedback mechanisms for future adoption.

Despite the abundant research regarding individual-level feedback, few studies examine team feedback, particularly the relationship between team feedback reactions and organizational performance. Through a field study and a lab study, this paper examines two reactions to team feedback, specifically blaming and strategizing, and their relationship to team performance. Study 1 showed that both blaming and strategizing occur in about 1/3 of team feedback meetings in an international sample of teams. Blaming was found to negatively correlate with productivity improvement (r = -.59), whereas strategizing was found to positively correlate with productivity improvement (r = .33). Study 2 was a lab study conducted to addresses several of the limitations from Study 1. The results from Study 2 were mixed. Although the manipulation failed to differentiate the experimental conditions in Study 2, post hoc correlational analyses showed a positive relationship between strategizing and viability, and a negative relationship between excuse making and viability. Correlational analyses also revealed a negative relationship between blaming or excuse making and team cohesion. These results suggest further research is warranted in this area.

This dissertation presents two novel 6-axis magnetic-levitation (maglev) stages that are capable of nanoscale positioning. These stages have very simple and compact structure that is advantageous to meet requirements in the next-generation nanomanufacturing. The 6-axis motion generation is accomplished by the minimum number of actuators and sensors. The first-generation maglev stage is capable of generating translation of 300 ??m in x, y and z, and rotation of 3 mrad about the three orthogonal axes. The stage demonstrates position resolution better than 5 nm rms and position noise less than 2 nm rms. It has a light moving-part mass of 0.2126 kg. The total power consumption by all the actuators is only around a watt. Experimental results show that the stage can carry, orient, and precisely position an additional payload as heavy as 0.3 kg. The second-generation maglev stage is capable of positioning at the resolution of a few nanometers over a planar travel range of several millimeters. A novel actuation scheme was developed for the compact design of this stage that enables 6-axis force generation with just 3permanent-magnet pieces. Electromagnetic forces were calculated and experimentally verified. The complete design and construction of the second-generation maglev stage was performed. All the mechanical part and assembly fixtures were designed and fabricated at the mechanical engineering machine shop. The single moving part is modeled as a pure mass due to the negligible effect of the magnetic spring and damping. Classical as well as advanced controllers were designed and implemented for closed-loop feedback control. A nonlinear model of the force was developed and applied to cancel the nonlinearity of the actuators over the large travel range. Various experiments were conducted to test positioning, loading, and vibration-isolation capabilities. This maglev stage has a moving-part mass of 0.267 kg. Its position resolution is 4 nm over a travel range of 5 ?? 5 mm in the x-y plane. Its actuators are designed to carry and precisely position an additional payload of 2 kg. Its potential applications include semiconductor manufacturing, micro-fabrication and assembly, nanoscale profiling, and nano-indentation.

The availability of feedback in communication channels can significantly increase the reliability of transmission while decreasing the encoding and decoding complexity. Most of the applications like cellular telephony, satellite communications and internet involve two-way transmission. Hence, it is important to devise coding schemes which utilize the advantages of feedback. Most of the results in code designs, which make use of feedback, concentrate on noiseless and instantaneous feedback. But in real-time systems, the feedback is usually noisy, and is available at the transmitter after some delay. Hence, it is important that we characterize the gains obtained in this case over that of one-way channels. We consider binary erasure channels to keep the problem tractable. For the erasure channels with noisy feedback, we have designed and analyzed a concatenated coding scheme, which achieves lower probability of error than any forward error correcting code of the same rate. Hence, it is shown that even noisy feedback can be useful in increasing the reliability of the channel. We have designed and analyzed a coding scheme using Low Density Parity Check (LDPC) codes along with selective retransmission strategy, which utilizes the limited (but noiseless), delayed feedback to achieve low frame error rates even with small blocklengths, at rates close to capacity. Furthermore, our scheme provides a way to trade off feedback bandwidth for reliability. The complexity of this scheme is lower than that of a forward error correcting code (FEC) of same blocklength and comparable performance. We have shown that our scheme performs better than the Automatic Repeat Request (ARQ) protocol which makes use of 1 bit feedback to signal retransmissions. For fair comparisons, we have also incorporated the rate loss due to the bits which are fed back in addition to the retransmitted bits. Thus, we have shown that for two-way communications with complexity and delay constraints, it is better to utilize the availability of feedback than to use just FEC.

Universiẗat, Diss.--Paderborn, 1985.

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 174-179). Available also in a digital version from Dissertation Abstracts.

Thesis (M.S. in E.E.)--School of Electrical and Computer Engineering, Georgia Institute of Technology, 2004. Directed by David V. Anderson. / Includes bibliographical references (leaves 55-56).

Thesis (M.A.)--Wake Forest University. Dept. of Psychology, 2003. / Vita. Includes bibliographical references (leaves 49-51).

Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (p. 198-207).

Thesis (M. Sc.)--University of Hong Kong, 1967. / Mimeographed.