The rapid development of wireless applications has created a demand for low-cost, compact, low-power hardware solutions. This demand has driven efforts to realize fully integrated, "single-chip" systems. While substantial progress had been made in the integration of many RF and baseband processing elements through the development of new technologies and refinements of existing technologies, progress in the area of fully monolithic filters has been limited due to the losses (low Qs) associated with integrated passive elements in standard IC processes. The work in this thesis focuses on the development low-loss, Q-enhanced LC filters in GaAs E/D-SAGFET technology. This thesis presents a methodology for designing Q-enhanced LC resonators and low-loss, monolithic LC filters based on these resonators. The first phase of this work focused on the Q-enhancement of LC resonator structures using FET-based active negative resistance circuits. Three passive resonators were designed, fabricated, and measured to determine their loss and frequency response. Furthermore, six Q-enhanced resonators were designed, fabricated, and measured to compare the performance of various negative resistance circuit designs. In the second phase of this work, four of these Q-enhanced resonator designs were used to implement fully-integrated second-order Butterworth bandpass filters. Each filter was designed for a 60 MHz, -3 dB bandwidth centered at 1.88 GHz, corresponding to the North American PCS transmit band. The best filter design achieves 0 dB of passband insertion loss while consuming 16 mA of current from a 3 V source (48 mW). Passband gain (up to 15 dB) can be achieved with increased bias current before instability is encountered. The filter provides more than 30 dB of rejection at 1.7 and 2 GHz and more than 70 dB of rejection below 1.5 GHz. In the filter passband, the noise figure is 12 dB and the output 1 dB compression point is -18 dBm. These Q-enhanced LC filters have potential application as image-reject filters in GaAs integrated transceiver designs. / Master of Science

Adolescence is a developmental period characterized by an increase in risk taking. However, this is not always adverse, as risks can be classified as both positive and negative. Adolescence is also a period of time in which social relationships, particularly among peers, become increasingly salient, and as such, peer-related factors are often connected to risk-taking in adolescence. While peer relationships can provide adolescents with social support, they can also be harmful when they manifest in peer victimization. Thus, this study sought to understand the associations between positive and negative risk taking and relational and physical victimization in adolescence and young adulthood. Data were collected from 167 adolescents across five time points, approximately one year apart. Adolescents completed questionnaires that assessed their risk-taking perceptions and likelihood as well as peer victimization experiences. Results demonstrated that there were no significant cross-construct associations between positive and negative risk-taking perception and relational and physical peer victimization across adolescence. However, additional analyses examining positive and negative socially-related risk taking revealed a significant association between positive socially-related risk perception and relational victimization such that higher initial levels of positive socially-related risk perception predicted a slower decline in relational victimization across adolescence. Results also showed that overall, higher levels of risk-taking perception in adolescence predicted decreased levels of risk-taking likelihood in young adulthood, and that higher initial levels of physical and relational victimization in adolescence predicted higher levels of positive and negative risk-taking likelihood in young adulthood, respectively. Findings highlight the connection between peer victimization and positive and negative risk perception in adolescence, the potential risk-taking outcomes in young adulthood resulting from peer victimization experiences and risk-taking perception in adolescence, and most importantly, the differential roles of positive and negative risk taking in adolescence and young adulthood. / M.S. / Adolescence is a time in development where risk taking increases. However, this is not always adverse, as risks can be classified as both positive and negative. Adolescence is also a time in which peer relationships become especially important, and as such, peer-related factors are often connected to risk-taking in adolescence. While peer relationships can provide adolescents with social support, they can also be harmful when they result in peer victimization. Thus, this study sought to understand the associations between positive and negative risk taking and relational and physical victimization in adolescence and young adulthood. Data were collected from 167 adolescents across five time points, approximately one year apart. Adolescents completed questionnaires that assessed their risk-taking perceptions and likelihood as well as peer victimization experiences. Results demonstrated that there were no significant associations between positive and negative risk-taking perception and relational and physical peer victimization across adolescence. However, additional analyses examining positive and negative socially-related risk taking revealed a significant association between positive socially- related risk perception and relational victimization such that higher initial levels of positive socially-related risk perception predicted a slower decline in relational victimization across adolescence. Results also showed that overall, higher levels of risk-taking perception in adolescence predicted decreased levels of risk-taking likelihood in young adulthood, and that higher initial levels of physical and relational victimization in adolescence predicted higher levels of positive and negative risk-taking likelihood in young adulthood, respectively.

With a rise in concern for animal welfare, the equine world has started using positive reinforcement (R+); as such, horses often experience a combination of negative reinforcement (R-) and R+. I compared the effects of R- to a combination of positive and negative reinforcement (R-/R+) training. Horses were trained to walk across two visually discriminable liverpools (striped, Experiment 1; colored water, Experiment 2), each associated with either R- or R-/R+, and training type alternating across six days. I measured highest training criteria reached, prevalence of undesirable behaviors, salivary cortisol (pre- and post-training), time spent by the trainer in motionless human tests (pre- and post-training), and horses' preference for the two liverpools using concurrent choice. Across both experiments, I found no significant difference in the proportions of criteria reached between training types; horses engaged in mugging for longer periods of time in R-/R+ than R-; no significant difference between training types for the pre- to post-change of cortisol; a greater proportion of horses increased time spent with R-/R+ trainer than the R- trainer; and no difference between first choice in the preference test or time horses spent in proximity to the liverpool, based on the training type with which the liverpool was associated. Overall, I found few differences between R-/R+ and R-, which could be due to horses only having 30 min total training contact with either training, or my use of relatively low intensities of R- and R+. / Master of Science / The equine world has started using positive reinforcement (R+), such as providing treats. Often horses experience a combination of negative reinforcement (R-) and R+, such as having rein pressure released and being given a treat. I compared effects of R- to a combination of positive and negative reinforcement (R-/R+) training. Horses were trained to walk across two visually distinct liverpools, a 1 m X 2.7 m shallow pool, (striped, Experiment 1; colored water, Experiment 2) each associated with either R- or R-/R+, and training type alternating across six days. I measured highest training level reached, occurrence of undesirable behaviors, salivary cortisol (a measure of stress), time spent by the trainer in motionless human tests, and horses' preference for the two liverpools. Across both experiments, I found no significant difference in the proportions of criteria reached between training types; horses investigated the trainer for treats for longer durations in R-/R+ than R-; no significant difference between training types for the pre- to post-change; a greater proportion of horses increased time spent with R-/R+ trainer than R- trainer; and no difference between first choice in the preference test or time horses spent in proximity to the liverpool, based on the training type with which the liverpool was associated. Overall, I found few differences between R-/R+ and R-, which could be due to horses only having 30 min total training contact with either training, or my use of relatively low intensities of R- and R+.

京都大学 / 新制・課程博士 / 博士(工学) / 甲第25302号 / 工博第5261号 / 新制||工||2001(附属図書館) / 京都大学大学院工学研究科物質エネルギー化学専攻 / (主査)教授 安部 武志, 教授 阿部 竜, 教授 陰山 洋 / 学位規則第4条第1項該当 / Doctor of Agricultural Science / Kyoto University / DGAM

This dissertation deals with the properties of two modified moment estimators for parameters of the negative binomial distribution (NBD). Several parametric forms have been suggested for the NBD. The estimation problems vary according to the form which is used. In particular, the form proposed by Anscombe [Biometrika, 37 (1950), pp. 358-382), with parameters λ and α, has received wide attention and was selected for study in this investigation. In Anscombe's parametric form, the mean of the NBD is λ and the variance is λ + λ²/α. While the parameter λ is universally estimated by the sample mean, many different methods of estimation for α have been attempted. Among these, the maximum likelihood estimator α* and the simple moment estimator â are most often used. However, α* is quite difficult to obtain numerically and often this computation requires the use of an electronic computer. In addition, â, while not difficult to compute, is often inefficient. For these reasons, it was felt that a study of the two modified moment estimators â₁ and â₂, suggested by Shenton and Wallington [Moment Estimators and Modified Moment Estimators with Special Reference to the Negative Binomial Distribution (unpublished)], was needed. In the text, the method of obtaining modified moment estimators in general is given in detail. The application of this method to the NBD is discussed and, in particular, the derivations of â₁ and â₂ are presented. Since orthogonal statistics play an important part in this work, their definition and applications are reviewed. In order to evaluate the small sample properties of â₁ and â₂, asymptotic expansions, in powers of 1/n, of their biases, variances, covariance determinants, and higher moments were determined numerically in the parameter space (1 ≤ α ≤ 100, 1 ≤ λ ≤ 100), through terms to n⁻⁴. The computational method for this work is described in detail. Tables and charts which display the nature of the expansions are given in the text. The results show that the behavior patterns of the moment expansions for â₁ and â₂ are somewhat similar to those for â and α*. For both â₁ and â₂, the n⁻⁴ term contributes heavily in all the expansions when α > λ. Thus, as with the other estimators, a first term approximation would not suffice for the properties of â₁ and â₂. Further, the results give evidence that â₁ and â₂ are highly efficient for most α and λ, and, in some regions of the parameter space, have less bias than α* and â. Some experimental data was fitted to the NBD using the estimators â₁, â₂, â, and α*. In all of the examples given, the modified moment estimators provided a better fit of the data than did the simple moment estimator and, in one instance, a better fit than was obtained by the maximum likelihood estimator. / Ph. D.

Our objective was to compare cefazolin concentrations in biopsied tissue samples collected from surgically created wounds treated with negative pressure wound therapy to those collected from surgically created wounds treated with nonadherent dressings. The study design was a prospective, controlled, experimental study. The animal population included 12 female spayed beagles. We hypothesized there would be a difference between the cefazolin concentrations of wounds treated with negative pressure wound therapy when compared to the cefazolin concentrations of wounds treated with nonadherent dressings. Surgical methods were as follows: Full thickness cutaneous wounds were created on each antebrachium (n=24). Following surgery, cefazolin (22 mg/kg) was administered intravenously to each of the dogs and continued every 8 hours during the study. The right wound was randomly assigned to group I or group II while the wound on the contralateral antebrachium was assigned to the other group. Group I wounds were treated with negative pressure wound therapy (NPWT) and group II wounds were treated with nonadherent dressings for 3 days. Dressings were changed and tissue biopsies obtained from wound beds at 24-hour intervals for both groups. Cefazolin wound tissue and plasma concentrations were measured by liquid chromatography mass spectrometry (LC-MS/MS). Blood samples for measuring plasma cefazolin concentrations were collected prior to biopsy sampling. At the time of surgery and at each bandage change, wound beds were swabbed and submitted for aerobic and anaerobic culture. Our results revealed that after initiating cefazolin treatment, wound tissue antibiotic concentrations between treatment groups were not significantly different at any sampling time. Similarly, after initiating cefazolin treatment, plasma cefazolin concentrations were not significantly different at any sampling time for individual dogs. We concluded that using a canine experimental model, NPWT treatment of surgically created wounds does not statistically impact cefazolin tissue concentrations when compared to conventional nonadherent bandage therapy / Master of Science

Current inventories of interpersonal trait dependency are problematic because they are based on theories that fail to recognize the positive aspects of dependency. The main goal of this thesis was to develop a new inventory that takes into account theoretical advances using Robert Bornstein's definitions and identified components of interpersonal dependency. The study was broken into the following three stages: 1. Item and inventory creation, 2. Expert feedback and interrater reliability and 3. Data collection and analysis. Three-hundred fifteen undergraduates completed a questionnaire packet, consisting of a demographics section, a copy of the new inventory, and seven other inventories that measure dysfunction and well-being. Although the original hypotheses in this work were not supported, exploratory factor analysis yielded four factors. These four factors and their relevance to the measurement of interpersonal dependency are discussed and suggestions are made for future studies. / Master of Science

This thesis essentially takes two separate paths to solve the same problem, namely that of obtaining an estimator, a parameter of the negative binomial distribution, for which we can show that such properties as bias and variance of this estimator are "better" than corresponding properties of the simple moment estimator, the latter being the estimator which is used most often in practice. We first consider two moment estimators involving the third sample moment. In the case of both of these estimators, for a restricted range of the parameters and of sample size, these estimators are not an improvement over the simple moment estimator. In fact, for the range considered, the bias and variance of the simple moment estimator was always smaller. We then considered an estimator which was defined as the simple moment estimator for part of the sample space and defined as a constant elsewhere. This was primarily done to remove a "singularity" in the moment estimator. It was felt that this singularity was causing the large bias and variance which seemed to exist for certain values of the parameters. For n=100, the bias and variance were approximated in a range of interest of the parameters. The results indicate an improvement over the sample moment estimator. / Ph. D.

This degree work delved into the intersections of fashion and art, specifically focusing on creating wearable knitted sculptures. For this, the presented project considered the idea of designing spatially, without a human body as a reference, by shaping knitted forms inside a scaffolding. The exploration began with an in-depth investigation of knitting to identify different form expressions through merging and manipulating traditional knitting techniques such as plain, transfer, and partial knitting. Three knitted wearable sculptures were developed based on the knitting experiments by creating stripes on the knitting in a fully fashioned way. Further on, these wearable sculptures underwent various steps of development, such as sculpting, draping, and surface modification.

Challenging behavior is a growing problem for teachers. Praise has been promoted as a positive strategy for addressing problem behavior. The ratio of praise-to-correction (positive-to-negative) may be important to the effectiveness of praise. A 4:1 ratio has been recommended as optimal to improve student performance. This ratio has never been experimentally tested. There is little known of the feasibility and social validity for maintaining a high positive-to-negative ratio. The purpose of this study was to evaluate the effect of a 4:1 positive-to-negative ratio (PNR) on problem behavior and academic performance of junior high students with an intellectual disability classification in a self-contained classroom for students with severe/profound disabilities with the aid of a self-monitoring tablet app. Research questions were (a) to what extent does the PNR tablet app help educators maintain the 4:1 positive-to negative interaction ratio during academic instruction and to what extent can educators maintain a 4:1 PNR in the absence of the tablet app, (b) to what extent is a 4:1 PNR interaction socially valid, (c) to what extent does a positive– negative interaction ratio impact the frequency of problem behavior during an academic task, and (d) to what extent does a positive–negative interaction ratio impact the percent of correct responses on an academic task. The results of this study did not show a functional relation between praise and decreasing problem behavior nor increasing academic performance. Results did indicate that using a tablet app was a socially valid intervention to achieve a 4:1 PNR.