Mental health in young adults can vary significantly with a large proportion struggling with clinical disorders. Despite the high prevalence of psychopathology, many do not receive help. Relevant barriers to help-seeking include self-reliance, lack of awareness of symptoms or sources of help, and stigma. Measurement Feedback Systems (MFSs) and self-monitoring are potential avenues to assist in treatment engagement. In this study, Bi-Weekly Monitoring with Informational Feedback (BWM) was implemented in a college student population (N = 74) where students were asked to report on their overall psychological functioning and set goals every other week. BWM was evaluated for feasibility, effects on help-seeking overall, and mechanisms of self-monitoring were explored. BWM was determined to be feasible in this population; although, help-seeking attitudes did not change over time as a result of BWM. Ancillary analyses explored the effects of BWM and mental health symptomatology. Participants reported on their attitudes towards BWM which were generally in favor of BWM. Some promising results emerged; however, they were largely statistically insignificant. Limitations of this study include a large drop-out rate in the control group, which left unequal groups. As such, analyses should be interpreted with caution. Future studies should evaluate BWM on a weekly basis with a larger sample to better understand the effects of BWM on self-monitoring mechanisms. / Master of Science / Mental health in young adults can vary significantly with a large proportion struggling with clinical disorders. Despite the high prevalence of psychopathology, many do not receive help. Relevant barriers to help-seeking include self-reliance, lack of awareness of symptoms or sources of help, and stigma. Measurement Feedback Systems (MFSs) and self-monitoring are potential avenues to assist in treatment engagement. In this study, Bi-Weekly Monitoring with Informational Feedback (BWM) was implemented in a college student population (N = 74) where students were asked to report on their overall psychological functioning and set goals every other week. BWM was evaluated for feasibility, effects on help-seeking overall, and mechanisms of self-monitoring were explored. BWM was determined to be feasible in this population; although, help-seeking attitudes did not change over time as a result of BWM. Attitudes towards BWM were variable, yet largely favorable. While some promising results emerged, there has yet to be concrete support for BWM. This study is limited due to a large drop-out rate in the control group, as such the results should be interpreted with caution. Future studies should evaluate BWM on a weekly basis with a larger sample to better understand the effects of BWM on self-monitoring mechanisms.

Globally, a wealth of educational data has been collected on learner performance in a bid to improve and monitor the quality of education. Unfortunately, the data seem to have had only limited influence on learning and teaching in classrooms. This thesis aimed to bridge this gap between the availability of learner performance data and their use in informing planning and action in schools. A design research approach was used to optimise the feedback system for the South African Monitoring system for Primary schools (SAMP). Design research aims to produce both an intervention to address a complex real-world challenge and to develop design guidelines to support other designers faced with similar challenges in their own context. In this research, the process of developing and improving the feedback system was also used to examine ways of facilitating the use of the feedback. Multiple cycles of design, implementation and evaluation of four different prototypes of the feedback system were conducted, employing evaluations from both experts (e.g. Dutch and South African academics, research and educational psychologists, instrument designers and teacher trainers) as well as school users (teachers, principals and HoDs). Mixed methods were employed throughout the study, with different sub-samples of school users sampled from the population of 22 schools (English, Afrikaans and Sepedi) in the Tshwane region participating in SAMP. The various research cycles incorporated interviews, observations, journals, questionnaires, the Delphi technique and expert evaluations to examine not only data-use, but also aspects such as problem-solving, planning, data-literacy and attitudes towards evidence-based practice in the schools. Data was analysed using Rasch Modelling, descriptive statistics and computer-aided qualitative data analysis. The study showed that an effective feedback system facilitates appropriate use through a gradual process of enlightenment, is flexible and responsive to user inputs, values collaboration and includes instrument, reporting and support components in its design. An optimum feedback system also positively influences school feedback and monitoring culture by providing opportunities for positive experiences with feedback and increasing data-literacy. This improves the chances of feedback being used for planning, decision-making and action in the schools. An effective feedback system must also offer a comprehensive package to accommodate different users, with various levels of data sophistication, functioning in diverse contexts. The research also showed that an effective feedback system mediates thinking about educational instruction and curriculum and can therefore be a potent change agent. Use of clear, simple, intuitive data presentation in the feedback system allows for experiential learning to increase user data-literacy. The design research approach employed in this study offers an appropriate and powerful approach to adapting, developing and optimising a feedback system. User involvement in design research ensures greater contextualisation and familiarity with the system, while engendering trust and a greater sense of ownership, all of which increase the receptiveness and responsiveness of users to feedback. Finally, the research also contributed design guidelines for other developers of feedback systems, an integrated conceptual framework for use of monitoring feedback and a functioning feedback system employed by 22 schools in the Tshwane region. / Thesis (PhD)--University of Pretoria, 2010. / Science, Mathematics and Technology Education / unrestricted

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / A digital feedback system used to monitor and control a high energy electron beam’s orbit and stability in a VUV and X-ray storage ring will realize a 10 fold increase in the feedback system response time using packetized (IRIG 107-98) telemetry. The improvement in feedback time will provide a significant improvement in the level of orbit stability. This paper discusses the advantages of using a packetizing standard and high speed data acquisition as a cost effective way to support the scientific community in their real time processing needs.

<p>The Duke storage has been developed as a dedicated driver for the storage ring based free-electron lasers (FEL) and a high flux Compton gamma-ray source, the High Intensity Gamma-ray Source. The storage ring can be operated from about 250 MeV to 1.2 GeV, which can produces FEL lasers over a wide range of wavelengths and gamma-rays with a tunable energy from 1 MeV to 100 MeV. The Duke light source facility conducts world-class researches across a wide range of scientific disciplines and technological applications.</p><p> In a storage ring, beam instabilities can cause a signifcant degradation in machine performance. In the Duke storage ring, coupled-bunch instabilities (CBIs) are the main source which limit ultimately achievable beam current in multi-bunch operations. In order to to suppress CBIs in the Duke storage, we developed a bunch-bybunch longitudinal feedback (LFB) system which is based on a field programmable gate array (FPGA) embedded system. During the design and implementation of the LFB system, several novel methods and techniques are developed in numerical analysis of feedback control and kicker cavity design/fabrication. High current are realized at low energies by using the LFB system. In addition, after the successful commissioning of the LFB system, a analog transverse feedback (TFB) system has been upgraded to a digital one using the same technique as the LFB system. </p><p>The LFB system has been routinely operated for HIGS. Additional,the LFB and TFB feedback systems become an useful diagnostic tools in researches of electron beam dynamics, FEL lasing process, and background of HIGS. The control of CIBs in different operation modes are studied using the feedback system. Furthermore, based on the TFB system, a novel bunch cleaning method has been developed to reduce the background of gamma-ray.</p> / Dissertation

Das Verhältnis von Musik zu Bewegung gilt als spezifisches Merkmal von Tanz. Doch sind Art und Ausmaß dieser Verknüpfung immer wieder Gegenstand radikaler Befragungen gewesen. Sie reagieren vor allem auf neue Medien und mediale Techniken, insbesondere synthetische Tonerzeugung, elektroakustische Musik und Aufzeichnungstechniken. 1937 stellt in Paris der studierte Luftfahrtingenieur Marcel Ducout die Ergebnisse seiner Experimente zur „danse sonore“ vor. Die Bewegung der Tänzerin wird dabei durch Einsatz modernster Radiotechnik in ein elektrisches Feedback-System integriert, bei dem die Bewegung die Tonhöhe und -intensität beeinflusst. Ducouts Projekt schreibt sich ein in eine lebhafte Entwicklungsdynamik zur interaktiven Klang- und Musikproduktion während der Zeit zwischen den beiden Weltkriegen.

abstract: For this master's thesis, an open learner model is integrated with Quinn, a teachable robotic agent developed at Arizona State University. This system is represented as a feedback system, which aims to improve a student’s understanding of a subject. It also helps to understand the effect of the learner model when it is represented by performance of the teachable agent. The feedback system represents performance of the teachable agent, and not of a student. Data in the feedback system is thus updated according to a student's understanding of the subject. This provides students an opportunity to enhance their understanding of a subject by analyzing their performance. To test the effectiveness of the feedback system, student understanding in two different conditions is analyzed. In the first condition a feedback report is not provided to the students, while in the second condition the feedback report is provided in the form of the agent’s performance. / Dissertation/Thesis / Masters Thesis Computer Science 2016

Currently, more and more people use music streaming websites to listen to music, and a music recommendation service is commonly provided on the music streaming websites. A good music recommender system improves people’s user experience of music streaming websites. Nevertheless, there are some issues regarding the existing music recommender systems that need to be looked into.The purpose of this thesis is to identify the weaknesses of music recommender systems. Spotify, a Swedish music streaming website, has a large number of users. As it is a widely known streaming service, it seems appropriate for a case study on the drawbacks of music recommender systems.The case study method has been chosen for doing this research. The process of making up this thesis was divided into three stages. At the first stage, some basic preparations for the thesis were done. The second stage was characterized by some empirical work, like interviews and questionnaires, to collect the required data. Those empirical findings were analyzed in the third part to help us to identify and define the drawbacks.The research results presented in this thesis contribute to close several knowledge gaps in the area of music recommender systems and could thus be beneficial to different actors: streaming website operators to identify drawbacks of their recommender system; designers of recommender systems to improve system design; and, last but not least, this thesis provides some useful advice to those who market music streaming websites.This thesis does not focus on the technical and algorithm fields, i.e. the hardware- and software-related background. Instead, the idea and the functions of the recommender system, its feedback loop and the user experience were subject to our research and discussion. The results of the thesis can provide those responsible with both and inspiration for creating more customized recommender systems.

Das Verhältnis von Musik zu Bewegung gilt als spezifisches Merkmal von Tanz. Doch sind Art und Ausmaß dieser Verknüpfung immer wieder Gegenstand radikaler Befragungen gewesen. Sie reagieren vor allem auf neue Medien und mediale Techniken, insbesondere synthetische Tonerzeugung, elektroakustische Musik und Aufzeichnungstechniken. 1937 stellt in Paris der studierte Luftfahrtingenieur Marcel Ducout die Ergebnisse seiner Experimente zur „danse sonore“ vor. Die Bewegung der Tänzerin wird dabei durch Einsatz modernster Radiotechnik in ein elektrisches Feedback-System integriert, bei dem die Bewegung die Tonhöhe und -intensität beeinflusst. Ducouts Projekt schreibt sich ein in eine lebhafte Entwicklungsdynamik zur interaktiven Klang- und Musikproduktion während der Zeit zwischen den beiden Weltkriegen.

在現今這個「宅經濟」漸漸蓬勃的的年代，上網購物變成一種新興的購物 型態與休閒娛樂的管道，越來越多人選擇上網採購以免除出外購物所耗損 的時間跟精力。因此，網路拍賣開始受到許多人的歡迎，舉凡吃、穿、用 的，都可以在拍賣的世界中找到各式商品。但是，網路購物雖然方便，卻 也因為消費者無法直接接觸賣方與商品而使得糾紛事件層出不窮。因此， 多數消費者對於網路購物一直存有或多或少的知覺風險。在缺乏面對面接 觸下，網路口碑變成消費者是否購買此一商品的重要考量。而拍賣網站中 所提供的評價機制，就是一種消費者藉由口碑來了解賣方的管道。因此， 本研究試圖探討賣方的評價內容留言，對消費者購買意願與知覺風險的影 響。透過實驗法，架設兩種情境。情境A讓受試者接收正面評價內容，而情 境B則讓受試者觀看負面評價內容。本研究對象皆為有網路購物經驗的大學 生與研究生，共收集了126份有效樣本，根據研究結果分析，所得結論有三： 一、賣方良好評價留言會減少買方的知覺風險，而極差評價留言會增加買 方知覺風險的程度。 二、知覺風險越高，購買意願則越低。 三、賣方的評價留言對買方的購買意願有顯著影響。 / Many consumers often hesitate to buy product on-line because of the perceived risk of losing money and the feeling of uncertainty about the credibility of the sellers. Therefore, many auction sites have built feedback systems in order to provide consumers a tool of reference when engaging in online shopping activities. This study conducts an experiment in order to investigate how feedback comments may influence consumers’ level of perceived risk and their purchase intention. The research mainly focuses on two different patterns of feedback comments (Outstanding comments and abysmal comments) in an online auction market, to see if these comments affect consumers’ level of perceived risk and their purchase intention. The research subjects are college and graduate school students who have previous online shopping experiences. In total, this study collects 126 validated samples. According to the research results, there are three main conclusions: 1. Seller’s outstanding feedback comments will decrease buyer’s perceived risk in online shopping; on the contrary, seller’s abysmal feedback comments will increase buyer’s perceived risk. 2. If the buyer has lower perceived risk, the purchase intention will be higher. 3. Seller’ feedback comments will influence buyer’s purchase intention.

Dans les systèmes parcourus par un flux d’énergie ou de matière, des phénomènes d’auto-organisation sont possibles. Le système quitte son état d’équilibre thermodynamique, ses composants s’organisent en « structures dissipatives », aussi appelées des « patterns ». En optique, on observe de tels « patterns » dans les dimensions transverses des faisceaux laser lors de leur propagation dans certains matériaux nonlinéaires.Nous étudions ici les patterns observés dans un système photoréfractif à simple rétroaction optique. Le faisceau incident et le faisceau réfléchi par le miroir interfèrent dans le cristal photoréfractif et modifient ses propriétés électro-optiques. Cette modification influence en retour la propagation des faisceaux. Si le faisceau incident est suffisamment intense, le système dépasse le seuil dit d’ « instabilité de modulation » : l’observation du faisceau retour montre que l’intensité lumineuse s’est auto-organisée en structures géométriques remarquables, en patterns.Deux axes de recherche sont approfondis. Premièrement, nous étudions l’influence d’un moment angulaire orbital du faisceau incident (appelé alors un faisceau « vortex ») sur le pattern. Cette propriété du faisceau influe sur le phénomène d’auto-organisation et sur la dynamique des structures transverses obtenues. Un modèle numérique du mélange d’onde donne des résultats cohérents avec l’expérience. Deuxièmement, nous étudions le régime très fortement non linéaire, c’est-à-dire dans le cas d’un pompage gaussien classique mais très intense. Nous montrons par une analyse statistique que l’état turbulent observé loin du seuil est parcouru par des événements intenses, des ondes scélérates. / In systems through which flows of energy or matter propagate, it is possible to observe self-organization phenomena. The system can leave its thermodynamical equilibrium state. Its components self-organize themselves in « dissipative structures », also called « patterns ». In optics, we observe such patterns in the transverse dimensions of laser beams during their propagation in certain nonlinear materials.This thesis aims to study the patterns observed in a photorefractive single feedback system. The forward beam and the beam reflected by the mirror interfere in the photorefractive crystal and modify its electro-optical properties. This modification influences in return the propagation of the beams. If the incident beam is sufficiently powerful, the system reaches the « modulation instability » threshold : the observation of the backward beam reveals that the intensity has self-organized in patterns.Particularly, we deal in depth with two axes of research. Firstly, we study the influence of an orbital angular momentum of the input beam (therefore called a « vortex » beam) on the pattern formation process. This property influences the self-organization phenomenon and the dynamics of the transverse structures. Moreover the results provided by a numerical model of the wave mixing process are in a good accordance with the experimental observations. Secondly, we study the highly nonlinear regime obtained with a classical gaussian pump but very powerful. We show by a statistical analysis that the turbulent state far from the instability threshold contains some extreme events, also called « rogue waves ».