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Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 134-145). Also available via the Internet.

A stress control design protocol was developed to minimize coal mine bumps, which are the explosive failure of highly stressed pillars. The protocol was developed for room-and-pillar retreat mining conducted with available continuous miner technology. The inability of existing coal pillar equations to accurately represent the wide total extraction pillars required, forced the development of the pseudoductile coal pillar strength model. A confined pillar core is assumed to reach a maximum stress when surrounded by a yielded perimeter. The width of the yielded perimeter is assumed to increase linearly with increased coalbed thickness. The pseudoductile model was employed in the development of supercritical and subcritical width section design criteria. The supercritical design procedure assumes an infinitely long pillar line, composed of uniformly sized pillars, extracted against an infinitely wide gob area. Tributary area theory was combined with a linear shear angle concept to estimate the loads applied to total extraction pillars adjacent to gob areas. The boundary element code MULSIM/NL was utilized in the development and implementation of a systematic subcritical design procedure to apply the stress shield concept to retreat room-and-pillar coal mining, under bump hazard. The complex distribution of gob side abutment load between the side abutment pillars and the chain pillars in the total extraction zone made computer simulation a necessity. Section layouts were determined for the mining of a 6 ft thick coalbed under overburden up to 2,200 ft thick. The sections consist of total extraction areas separated by continuous abutment pillars. A spreadsheet program LAYOUT was created to summarize and provide for efficient utilization of the bump control design protocol. Based on overburden thickness, coalbed thickness, abutment load linear shear angle, and pillar dimensions entered by the user, LAYOUT calculates a stability factor for the first and second pillar row outbye the expanding gob for supercritical width sections. If the overburden and coalbed thickness conditions do not allow a supercritical section design, LAYOUT develops a subcritical design. / Ph. D.

Tyrimo aktualumas. Ne tik Lietuvoje, bet ir kitose šalyse mokytojo profesija netenka prestižo dėl didelės įpareigojančios etinės atsakomybės, informacinio ir fizinio krūvio, socialinių vaidmenų konfliktų, kurie sukelia išsekimą ir profesinį „perdegimą“. Anksčiau atliktuose tyrimuose mokytojų streso valdymo metodai nebuvo nagrinėjami. Tyrimo problema. Mokytojai dėl savo darbo specifikos nuolat patiria psichinį, fizinį, emocinį stresą, kuris daro įtaką ugdymo proceso kokybei. Tyrimo objektas. Mokytojų streso valdymo metodai. DARBO TIKSLAS. Atlikti mokytojų streso ir jo valdymo metodų analizę. UŽDAVINIAI 1. Apibūdinti streso sąvoką pedagogikoje . 2. Įvardinti mokytojų streso įtaka ugdymo procesui 3. Numatyti mokytojų streso valdymo galimybes. 4. Empiriškai ištirti mokytojų stresą ir jo valdymo metodus. Tyrimo klausimas. Ar mokytojai naudoja streso valdymo metodus savo darbe. Teorinis darbo pagrindimas. Teorinėje darbo dalyje aptariami mokytojo profesijos ypatumai, mokytojo streso įtaka ugdymo kokybei, mokyklos baimių fenomenas, streso šaltiniai mokytojo darbe, pateikiami mokslinėje literatūroje rekomenduojami mokytojų streso valdymo metodai ir pabrėžiamas mokyklos streso valdymo kompleksinio sprendimo būtinumas. Tyrimo radiniai. Empirinio kiekybinio tyrimo rezultatai parodė, kad mokytojai savo veikloje dažniausiai naudoja veiklos planavimo metodus. Tyrimo metu nustatyta streso požymių dažnumo ir streso valdymo metodų koreliacija. Kokybinio stebėjimo metodo metu gauti duomenys... [toliau žr. visą tekstą] / Topicality of the study. Not only in Lithuania, but in other countries as well, the teachers job is losing it's prestige because of extremely coercive ethical responsibility, informational and physical load, conflicts in social roles, which result in exhaustion and professional „burn out“. The control methods of the stress of the teachers have not been studied previously. The problem of the study. Because of the specifics of their job, teachers are constantly under mental, physical and emotional stress, which is affecting not only their health and social life, but also their students and the general quality of the process of education. The object of the study. Control methods of teacher's stress. PURPOSE OF THE STUDY. Make an analysis of the teachers' stress and its control methods. GOALS 1. Define “stress” in pedagogy 2. Define the effects of teachers' stress on the process of education 3. Present the options for teachers' stress control 4. Empirically study the teachers' stress and its control methods The question of the study. Are teachers using stress control methods in their work? Theoretical background. Theoretical part of this work discusses the specifics of the teacher's profession, the effects of their stress on the quality of the education process, the phenomenon of school fears, the sources of stress in teacher's job, the methods of stress control for teachers, recommended in scientific literature and emphasises the need for the complex control of stress in the... [to full text]

Existe un mayor enfoque de estudios de investigación hacia profesionales intérpretes que intérpretes en formación. Esta situación se evidencia aún más en la cantidad de estudios acerca del control de estrés de estudiantes de interpretación. Por ello, la presente investigación es un estudio de caso que tiene como finalidad describir el manejo de estrés de los estudiantes de últimos ciclos de los Talleres de Interpretación en la Universidad Peruana de Ciencias Aplicadas (UPC). El presente estudio se centra desde la perspectiva de los estudiantes para identificar los estresores, el nivel de estrés, las técnicas y estrategias de control de estrés de los mismos. El estudio tiene un enfoque mixto, cuantitativo y cualitativo; por ende, se propone aplicar las técnicas de encuestas y grupos focales. Para los dos primeros subobjetivos (estresores y nivel de estrés) se utilizará el instrumento del cuestionario. En este, se encuestarán a todas las secciones de los talleres de interpretación mediante el cuestionario adaptado de Chiang: Anxiety and Interpretation Learning Questionnaire (2006). En cuanto al tercer subobjetivo (estrategias y técnicas de estrés) se creará la guía del grupo focal y, en este, participarán un promedio de 4 a 5 estudiantes por nivel de taller de interpretación. Por tales fines, los sujetos de estudio serán los estudiantes de los últimos ciclos la UPC. / Nowadays, there seems to be more investigation into professional interpreters than interpreting students. This could be demonstrated by the quantity of the studies focused on interpreting students’ stress control. For this reason, the purpose of this investigation, which is a case study, is to describe stress management in the students of the interpreting workshops at Universidad Peruana de Ciencias Aplicadas (UPC). Based on the students’ perspective, this study aims to identify the stressors, the level of stress, and the students’ techniques and strategies of stress control. This study has a mixed approach, quantitative and qualitative. For the first two sub objectives (stressors and level of stress) a survey will be used as an instrument. By means of Chiang’s Anxiety and Interpretation Learning Questionnaire (2006), Interpreting workshop classrooms are going to be asked. For the third sub objective (techniques and strategies of stress control) a focus group guide will be created. Thereby, the subjects of study are the UPC students of the last terms. / Trabajo de investigación

I det moderna arbetslivet suddas gränsen mellan arbete och privatliv ut, samtidigt ökar stressrelaterade sjukskrivningar, särskilt för kvinnor. Syftet med studien var att undersöka vad kvinnor i arbetsledande roll behövde för att uppnå balans mellan arbete och privatliv samt vilka strategier som användes. 10 semistrukturerade intervjuer genomfördes och analyserades tematiskt. I analysen identifierades tre teman som var gynnande och fyra teman som var hindrande avseende balans mellan arbete och privatliv samt fem strategier som aktivt användes för att skapa en god balans. Resultatet visade att inflytande över och möjlighet till planering för det egna arbetet var av stor vikt och att aktiv fritid användes för återhämtning. En attraktiv arbetsgivare behöver ge stöd, struktur och tydligt ledarskap för att främja god balans. Studiens resultat stämmer väl överens med tidigare forskning inom området, men den bidrar med ökad förståelse kring självledarskapets betydelse avseende att stärka kvinnors egenansvar och förmåga att sätta gränser.

This master's thesis deals with stress analysis and optimalization frame of the self- loading package transporter. It consists the analysis of original frame, the proposed changes and analysis of new frame.

The aim of this master’s thesis is a retrofit of condensing three case steam turbine K300-170 with reheating. In the first part, the heat balance of the system is calculated for given parameters. The design of the flow section is focused on the combined intermediate pressure and low pressure turbine section and it consists of defining rotor and blading characteristics. In the stress control, the stress of the designed blading is checked and for the conclusion the shaft seal losses and their effect on the overall output power of the turbine are estimated. The drawing of axial section of combined intermediate pressure and low pressure turbine section is also included in the thesis.

Epilepsy is the most common, chronic, serious neurological disease in the world, with an estimated 65 million people affected worldwide. Recent studies on people diagnosed with epilepsy suggest that stress might trigger epileptic seizures. Interventions aimed at lowering stress might be able to reduce the risk for epileptic seizures among epileptics. In an attempt to explore this possibility, I conducted a systematic review addressing the efficacy of behavioral interventions targeted at lowering stress on seizure frequency among an epileptic population. This article also investigated the efficacy of these interventions on lowering self-perceived stress in the same population. Three databases were searched for obtaining 54 references. After a systematic filtering process, a set of 2 studies was retained after the full search procedure. The results suggest stress-reducing behavioral interventions do not have any statistically significant effects on lowering seizure frequency but have a statistically significant effect on lowering self-perceived stress ratings among an epileptic population. The small but promising results from trials and systematic reviews not included in this review warrant further research into the topic. Limitations regarding search procedure included studies and consideration for further research and reading for the presented topics are discussed.