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1
Khamzin, Yersin. "Technologie vstřikování zkušebních těles z termoplastů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-444217.
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The diploma thesis focuses on the optimization of technological parameters of plastic injection molding and the study of the influence of technological parameters on the quality of molded test specimens’ type 1A. The quality of molded parts for 3 types of polypropylene (PP) with different melt flow rate (Mosten GB 002, Mosten GB 218, Mosten MA 230) and 1 type of polystyrene (PS) (Krasten PS GP 154) was evaluated in terms of dimensional stability and weight. The contribution of software for modeling the plastic injection molding process was evaluated in this work. SOLIDWORKS Plastics software was used to optimize technological parameters. The construction of the bodies, mold and cooling system was constructed, and test bodies were produced on the basis of parameters obtained from the simulation of the injection molding process. Their quality parameters were compared with a 3D model and for each of the studied materials the optimal technological parameters were selected in terms of quality and the degree of influence of individual injection parameters on the quality of moldings was evaluated. The accordance of the results of the theoretical simulation with the real experiment was proved and a computational module independent of the optimized quality parameters, generally suitable for optimizing the quality parameters of the injected parts, was developed.
2
Ribeiro, Ana Teresa da Cunha Machado. "Desenvolvimento de fiambres de pescado com utilização de fibras vegetais e aplicação de diferentes tecnologias de gelificação." Doctoral thesis, Universidade de Évora, 2020. http://hdl.handle.net/10174/27679.
Full textAbstract:
Com o objetivo de desenvolver um produto saudável e pronto a consumir com
características semelhantes às de um fiambre de porco, entre as quais a textura, prepararamse
fiambres de pescado com incorporação de fibras vegetais e aplicação de duas tecnologias
de gelificação.
Neste sentido, foi estudado o efeito da espécie (dourada, robalo e corvina, de
aquacultura), época de captura (verão e inverno), adição de transglutaminase microbiana
(MTGase) e glucomanano de konjac (KGM) e gelificação térmica (pasteurização) ou
processamento por altas pressões (HPP), nas propriedades texturais e na cor dos fiambres. O
produto preparado com corvina capturada no inverno e 0,5 % de MTGase apresentou as
características que mais se assemelhavam às do fiambre de porco. A substituição de KGM por
fibra de chicória e a adição de isolado de proteína de ervilha permitiram otimizar as
propriedades físicas e melhorar as propriedades funcionais deste fiambre.
A preferência do consumidor, relativamente à cor de fiambre de peixe e avaliada por um
inquérito “on line”, foi para um fiambre preparado com 0,0005 % de cochonilha, cuja cor era
muito semelhante à do fiambre de corvina sem corante.
Os fiambres de corvina submetidos às combinações 350 MPa/10 min ou 20 min/30 °C e
500 MPa/10 min/30 °C apresentaram a textura mais próxima da do fiambre pasteurizado. Sob
estas últimas condições de HPP, estudou-se o efeito da MTGase (0,25 % - 0,5 %) como
potenciador da gelificação, tendo os resultados evidenciado a necessidade do uso de, pelo
menos, 0,25 % de MTGase, para não comprometer as propriedades texturais.
O tratamento térmico foi mais eficaz na inativação microbiana que o HPP a 500 MPa/10
min/30 °C, e os fiambres, pasteurizados ou submetidos ao HPP, apresentaram-se próprios para
consumo até ao 35.º e 21.º dia de armazenagem em refrigeração, respetivamente; ABSTRACT:
In order to develop a healthy and ready to eat product with similar characteristics to
those of a commercial cooked pork ham, namely texture, fish hams were prepared with the
incorporation of vegetable fibers and the application of two gelation technologies.
Thus, the effect of the species (farmed gilthead sea bream, sea bass and meagre),
harvesting seasons (summer and winter), addition of microbial transglutaminase (MTGase) and
konjac glucomannan (KGM), as well as thermal gelation (pasteurization) or high pressure
processing (HPP), were studied on the textural properties and color of fish ham. The
characteristics of the ham prepared with winter meagre and 0.5% MTGase were the most
similar to those of cooked pork ham. The replacement of KGM by chicory fiber and the
addition of pea protein isolate allowed to optimize the physical properties and to improve the
functional properties of this ham.
Consumer preference for fish ham color an assessed by an on-line survey was for a ham
prepared with 0.0005% cochineal, whose color was very similar to that of the dye-free meagre.
The meagre hams submitted to the combinations 350 MPa/10 min or 20 min/30 °C and
500 MPa/10 min/30 °C had a texture closer to that of pasteurized ham. Under these HPP
conditions, the effect of MTGase (0.25 % - 0.5 %) as a gelation enhancer was studied, and the
results showed that at least 0.25 % MTGase is needed, for not compromising the textural
properties.
The heat treatment was more effective on the microbial inactivation than HPP at 500
MPa/10 min/30 °C, and the pasteurized or HPP cooked hams were fit for consumption up to
the 35th and 21st storage days in refrigeration, respectively.
3
Bulejko, Pavel. "Application of Polymeric Hollow-Fiber Membranes in Air Filtration." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401603.
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Membrány z dutých vláken jsou široce využívány v aplikacích týkajících se úpravy kapalin jako např. při čištění odpadních vod, v membránových kontaktorech a bioreaktorech, membránové destilaci apod. I když jsou často využívány při separacích směsí plynů, je jejich použití pro mechanickou filtraci aerosolů velmi vzácné. Tato práce se zabývá filtrací vzduchu pomocí polypropylenových membrán z dutých vláken včetně jejich filtrační účinnosti, tlakových ztrát a také zanášením při dlouhodobé filtraci. Filtrační účinnost byla proměřena za použití různých aerosolů jako TiO2 a síran amonný. Tlakové ztráty byly měřeny při různých konfiguracích, tj. různé filtrační ploše a průměru vlákna membrány. Zanášení membrán bylo testováno použitím normovaného prachu definovaného normou ANSI/ASHRAE 52.2. Predikční modely pro filtrační účinnost a permeabilitu/tlakovou ztrátu membrány byly aplikovány na parametry membrán z dutých vláken a porovnány. Tyto membrány mají velikost pórů kolem 90 nm a poměrně nízkou porositu a tím vysoký potenciál pro separaci nanočástic ze vzduchu. Dále byla provedena analýza filtračního koláče a vyhodnocení energetických nároků a porovnány s teoretickými modely. V závěru práce je nastíněn odhad ceny životního cyklu při filtraci pomocí těchto membrán.
4
Linhart, Rasmus, and Daniel Nyborg. "Adapt or die : A qualitative study on how institutional pressures influence the strategies of sustainable investors and their holdings." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446936.
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Large institutional actors in the financial arena are moving their capital in a sustainable direction. This implies a change of the institutional norms and rules regarding sustainable investing. One of the problematic aspects of sustainable investing is how investors use different strategies to influence their holdings and what implications this choice might have on a sector level. The purpose of this paper is to empirically examine how the strategies from institutional investors are an expression of the current norms and rules in the field of sustainable investing. It also intends to illustrate how institutional pressures influence the strategies of investors and their holdings. By interviewing respondents from eleven institutional investors, we present data regarding norms and rules for sustainable investing and the consequences of the investor’s strategies. Our findings indicate there has been an immense increase in demand for sustainable products in recent years, resulting in institutional pressures that have influenced both the investors and their holdings. This exposes the field to selection processes which may force organizations to the point of adapt or die. Finally, our conclusion provides practical implications on what role institutional investors have in the quest for sustainable development.
5
Yang, Chih-Yuan, and 楊智元. "Improvement on Holding Pressure of All-Electric Injection Molding Machine." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/29644098262385392413.
Full textAbstract:
碩士國立中央大學
機械工程研究所
92
If we talk about the plastic, most people will have an impression on the injection molding machine in the modern society. It is the fastest, most convenient and popular machine to manufacture the plastic products. From the industrial use to people’s daily use, most plastic products are manufactured by the injection molding machine. The quality of the product has relations with the accuracy of the controller. The injection molding technology has already developed for so many years. Whether the all-electric or hydraulic machinery, the performance is up to the standard. Nowadays the major problem about the injection molding machine is tracking the holding pressure profile. The holding pressure profile relates to the quality of the product a lot. In this paper, I use the fuzzy and the PID control law are used and compared to track the pressure profile.
6
Su, Heng-Yi, and 蘇恆毅. "Improvement of Injection Molded Parts Appearance Using Gas-Assisted Holding Pressure." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/12304944644168675263.
Full textAbstract:
碩士國立高雄第一科技大學
機械與自動化工程研究所
101
Weld lines and sink mark are two surface defects that commonly appear along injection molded parts. Particularly, slight shrinkage lines that cause uncertain visual darkness depending on watching angles, is also named as ghost mark. The study aims to investigate the causes of these two surface defects with a tensile-testing-sample mold and improve them by using an exterior gas-assisted holding pressure method. The injection mold is peculiarly designed to enable the control of exterior pressure at the area of weld lines which is happened at the filling end of melt plastics. The surface qualities of testing samples are digitally examined through a proposed image processing approach. Experimental results depict that ghost mark can be easily found close to the area of weld lines, and the setting of high mold and melt temperatures and high injection speed and pressure enables to reduce the defect. Moreover, employing exterior gas-assisted holding pressure on the defect surface can efficiently improve its qualities; especially using an air pressure above 30 kgf/cm2 has significant effect on reducing ghost mark appeared on the surface of injection molded parts.
7
Chen, Jen-Te, and 陳仁德. "A Study on the Holding Pressure & Feeding Back-Pressure Control for Hydraulic Plastic Injection Molding Machine." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/s8x8eb.
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碩士國立高雄第一科技大學
電機工程研究所碩士班
105
In the injection molding process, the injection pressure, the injection velocity, the injection temperature, the clamping force, the feeding quantity and other factors will have influence on the quality of the injection molding. In order to study the complicated forming characteristics, firstly, we establish the molding process model to understand the dynamic behavior of the plastic injection molding operation. The established model can be further verified with the real machine to ensure the control design. In this research, we study the control performance of the injection-holding transition, holding pressure and the feeding back-pressure. Based on those studies some improving methods were proposed. For the injection-holding transition control, the injection screw position is decelerated before the injection ending point, and when the pressure turns flat the system switch to pressure control loop with S-curve smoothly changing the pressure to the first section holding pressure. For the holding pressure control, constant pressure with precise time period was controlled for the first section pressure control to make the mold precisely packed. After that, a smoothly declined holding pressure control was proposed to prevent the plastics flow in/out of the mold during the cooling stage. For the feeding back pressure control, the injection hydraulic cylinder continues to maintain back pressure, and the feeding motor rises the speed to the set value with S-curve and maintains constant speed thereafter. When the injection hydraulic cylinder reaches to the point before the end feeding position with a certain distance, the feeding motor decelerates to the minimum speed linearly according to the distance to the end feeding position. Finally, when the injection hydraulic cylinder reaches the end feeding position, the feeding motor stops immediately. At this point, the injection hydraulic cylinder will maintain the back pressure, and it will be stopped precisely at the end feeding position. Keyword: injection-holding transition, smoothly declined holding pressure, feeding back-pressure
8
鐘啟榮. "Study of Quality Assurance Contorl Failure Rate for Holding Pressure Gas Pipeline." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/95049147492692130020.
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Lee, I.-Pin, and 李義評. "Fuzzy Control Injection Velocity and Holding Pressure of an Injection Molding Machine." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/95242599764628454060.
Full textAbstract:
碩士國立成功大學
機械工程研究所
84
The most important three processes of injection engineering of IMM(injection molding machine) are holding,sprue -closing and cooling,which notablly affect the quality of products.In order to get precise shape,mold shape change and material solidifying need to be considered before injection process.By way of multi- state injection,we can effectively adjust injection speed depending on thickness,shape and projective area of products. And,the multi-holding pressure method could be used to prevent the shrink fault and ineer stress problem of products.Because of the nonlinear time- varying characteristics of IMM cause by complex system structure and change of the oil''s viscosity due to the various temperatures,it is very difficult to get accurate mathematical transfer function.And,all of this increases the difficultly in control.Because the fuzzy control method is to emulate the mankind''s decision process it does not need to get the mathematical model of IMM.And,we can design controller directly. When we design fuzzy controller,it is necessary to adjust parameters.The traditional method to obtain optimum parameters is trial and error.But time-consuming and lack of systematization are its big drawbacks.Taguchi method could easily obtain optimum parameters in least experiments by way of systematic reasoning. Because liquid plastic is so viscous that the signals from linear scale irregularly vary.If we differentiate these signals we will get much undesirable noise.The velocity estimator could help us to improve this problem.Three kinds of estimators are Taylor series expansion, backward difference equation,and least square method.Among them, the least square method is the most powerful filter so we use it to eliminate the effect of noise in this experiment.
10
Hou, Shang-Chieh, and 侯尚杰. "Study on thermal properties, holding pressure and dynamic of solvent debinding in alumina injection molding." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/93735875928760550836.
Full textAbstract:
碩士國立臺灣大學
材料科學與工程學研究所
85
AbstractThe effects of holding pressure (PIII) and holding time (tIII) on the properties of injection molding parts were investigated. Besides, gate pressure and cavity pressure were monitored by pressure sensors positioned in front of and inside of the gate. Three polymeric additives, paraffin wax, polypropylene, stearic acid, and alumina feedstocks with former polymeric additives, in a solid loading containing 56.6 vol%, were studied by thermogravimetric analysis in air. In addition, weight loss, pore size distribution and dilatometry of test bars were measured during solvent debinding.Increasing holding pressure from 5% to 95% and holding time up to 75 sec, the pressure-time traces showed different tendency in the mold. Maximum pressure occurred at the end of pressure build-up. Increasing the holding pressure (PIII), 5% to 95%, raised the gate pressure and cavity pressure. Because of resistance through the gate, the cavity pressure was slightly smaller than the gate pressure. The mass, dimensions and flatness of injection molded were measured, and would increased as holding pressure. A high holding pressure(≧50%) would also decrease the sink of specimens, and prolonged the packing time by increasing holding time. Green bulk density, fired density and four-point bending fracture strength were obtained. The results showed that there was not apparent dependence of green bulk density, fired density and fracture strength on the injection pressure(PIII) .N-heptane was used to leach soluble polymers in solvent debinding. The weight of sample measurements decreased with time was measured by two methods, either interruption and in-situ time methods. The temperature effects of n-heptane tested from 40oC to 60oC, the result showed that the case of 60oC exhibited a fast leaching rate and a maximum swelling ratio measured by a laser dilatometer. Pore size of debinding specimens were measured by a mercury porosimeter, and showed a bimodal distribution, but increased the pore volume as the debinding time proceeded.TGA at a heating rate from 2 oC/min to 20 oC/min of polymeric additives and alumina greens were conducted up to 550 oC in purged air 50ml/min. The TGA curves of polymeric additives and feedstocks shifted to low temperature as the heating rate decreased. Then, the activated energy and reaction order were analyzed using Ozawa and Friedman, methods. The activated energy was in range 90?0 kJ/mol, but the reaction order of alumina green parts changed from 0 to 3.2 in the later stage of the thermal debinding of alumina feedstocks. Keywords：alumina, injection molding, pressure, solvent debinding, reaction order, thermal debinding.
11
Leong, Chan-Pon, and 梁振邦. "The Study of Working Pressure and Related Strategies for the Banking Managers in the Financial Holding Company of Tainan City." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/37082124679134756089.
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碩士立德管理學院
工業管理研究所
93
This study evaluates the banking management strategies and work attitudes. Due to different career feature and individual personality, different types of manager reflect different responses in every structure. Three hypothesis of the research are：differentia between individual characteristics and variables, relations among variables, and consequence resulted from variables. Through actual investigations using information analysis methods as auxiliary in the great Tainan area, such as factor analysis, reliability analysis, descriptive statistics, t-test, ANOVA, correlation analysis and regression analysis, in order to process and test every type of hypotheses. The research results show that：1. Individual personality is significantly related to job stress, personality traits, management strategies and work adjustment. 2. Job stress, work adjustment and management strategies are closely related to each other. 3. Job stress, management strategies affects the result of job stress. Suggestions based on the above conclusions are provided to bank management, administrative staff and future research as herein.
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Chen, Hsing-Yu, and 陳星佑. "Temperature and Pressure Holding Time Effect on Formation of Metallic Patterns by Nanoimprint Technology — Molecular Dynamics Simulation and Nanoimprint Experiment." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/47663292538068352111.
Full textAbstract:
碩士國立清華大學
動力機械工程學系
93
This thesis presents a theoretical and experimental study on the formation of nano-scale patterns on gold thin film by using nanoimprint technique. The aim is to study the effect of different manufacturing environments, temperature and pressure holding time, on the formation of metal patterns. This thesis is mainly divided into two parts. The first part employs molecular dynamics simulation method for the theoretical study to observe the nanoimprint process by changing its simulation temperature and holding time. The simulation results can not only be used for examining the mechanics in the forming process but also be taken as a reference of nanoimprint experiment. The second part is nanoimprint experiment. This research uses silicon mold and gold thin film to conduct the experiment. Different parameters, temperature and holding time, are designed to find the optimum experimental environment for nanoimprint process. From the results of molecular dynamics simulation and nanoimprint experiment, one can find that if the temperature is higher or the holding time is longer, the pattern formation will be wider or deeper. The results illustrate that the experimental environment can be assigned to be 1000C in temperature and 4 minutes in holding time in order to obtain good quality of pattern transfer of the mold.
13
CHEN, CHUN-CHIA, and 陳俊佳. "A STUDY ON WORKING PRESSURE AND JOB BURNOUT PERCEIVED BY ELEMENTARY SCHOOL TEACHERS HOLDING ADMINISTRATIVE JOBS CONCURRENTLY IN TAIPEI COUNTY." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/72586320167679791264.
Full textAbstract:
碩士輔仁大學
教育領導與發展研究所
96
The purpose of the study is to explore the relationship between working pressure and job burnout perceived by elementary school teachers holding administrative jobs concurrently in Taipei County. The study is developed by“the questionnaires of the relationship between working pressure and job burnout perceived by elementary school teachers holding administrative jobs concurrently”--- take Taipei Country for example In school year 2007, elementary school teachers who serve in Taipei Country, hold administrative jobs concurrently, get additional pay (ex. deans or group leaders) were selected to fill out the questionnaires. The 696 questionnaires were issued and 576 copies of the 696 questionnaires issued are returned. The returning ratio is 82.8％.Statistics methods, such as the mean, standard deviation, t-test, one-way ANOVA, Pearson’s Product-moment correlation, and stepwise multiple regression, are used to analyze the material. Conclusions of the study are as follows： 1. The level of working pressure perceived by elementary school teachers holding administrative jobs concurrently in Taipei County is medium. 2. The level of job burnout perceived by elementary school teachers holding administrative jobs concurrently is below medium. 3. The consciousness of working pressure perceived by elementary school teachers holding administrative jobs concurrently will present significant differences on sex, matrimony, function, and different schools. 4. Job burnout perceived by elementary school teachers holding administrative jobs concurrently in Taipei County will present significant differences on sex, age, administrative experience, matrimony, function, school size, and different schools. 5. There is a positive correlation between working pressure and job burnout perceived by elementary school teachers holding administrative jobs concurrently in Taipei County. 6. Working pressure perceived by elementary school teachers holding administrative jobs concurrently in Taipei County is effective in predicting job burnout According to the above conclusions, the study suggests that educational administration institution should take orderly ways, increase the number of elementary school teachers, hold administrative personnel’s workshops or fellowships, establish administrative personnel’s professional websites and commutative platforms when they practice educational reform. Besides, a school principal should establish a channel of the counseling and consultation in school, pass down experience and skill , establish the rotation system of all the directors , build friendly campus atmosphere, mold good interpersonal relationship, hold activities in school and “team building” out of the school. The teachers holding administrative jobs concurrently should enrich their profession, increase their own ability, establish good interpersonal relationship on campus, use strategies to reduce pressure, build files ordinarily, and do supervisory work well. Keywords: working pressure, job burnout
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Luo, Guoyen, and 羅國彥. "The Study On The Pressure And The Coping Strategies Of The Teachers Holding Administrative Offices Of The Elementary School In NantouCounty." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/01820563732943534416.
Full textAbstract:
碩士國立暨南國際大學
教育政策與行政學系
100
Abstract The present research was aimed at a thorough understanding of the current status of the work pressure and coping strategies of the teachers holding administrative offices of the elementary schools in Nantou county , analyzing the relation between the work pressure and the coping strategies, and simultaneously comparing different situations of the work pressure and the coping strategies of teachers with different background factors. According to the research findings, the researcher presents his suggestions to further respond to various kinds of work pressure and promote the administrative efficiency. The questionnaire survey was adopted for this study and took the teachers holding administrative offices of elementary schools in Nantou county as subject. The sample number was 101 elementary schools and in totality 607 teachers. 578 copies of questionnaires were recovered. The number of the effective questionnaires was 529 with a valid rate at 91%. The research tool was “the questionnaire survey on the work pressure and coping strategies of the teachers holding administrative offices of elementary schools in Nantou county”. The data was analyzed by using descriptive statistics，t-test，one - way ANOVA. The main conclusions were as follows: 1. The work pressure of the teachers holding administrative offices of elementary schools in Nantou county, the pressure from “the administrative burden” is the largest. 2. Of all the five aspects of the response tactics of the teachers holding administrative offices of elementary schools in Nantou county, “seeking for help ” is “most highly agree”. 3. The teachers holding administrative offices of elementary schools in Nantou county with enough support from their family，more years’s working experience in administration service，in larger schools， perceive fewer work pressure. 4. Female,married teachers,director of the office with more years’ working experience in service and with enough encouraging supports from their family agree more highly on the response tactics. Based on the study results , some suggestions were proposed for the reference of the teachers holding administrative offices of the elementary schools, principals and elementary schools, educational administration authorities, and for further advanced studies.
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Chen, Shu-Chun, and 陳淑淳. "The Study on the Work Pressure and the Response Tactics of the Teachers Holding Administrative Offices of Elementary Schools in Taipei City." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/38798647967013805844.
Full textAbstract:
碩士國立臺北教育大學
教育經營與管理學系
101
The purpose of this study was tounderstand the current status of the workpressure and response tactics of the teachers holding administrative offices of elementary schools in Taipei City, and analyze the relations between the workpressure and the response tactics, and compare different situations of the work pressure and the response tactics of teachers with different background factors. According to the research findings, the researcher presents the suggestions to further respond to various kinds of work pressure and promote the administrative efficiency of school. The present research adopted questionnaire survey and took the teachers holding administrative offices of elementary schools in Taipei City as subjects. The sample number was 70 elementary schools and in totality 660 teachers. 565 copies of questionnaires were recovered and the number of the effective questionnaires was 541. The data was analyzed by using descriptive statistics and Pearson Product-moment correlation, step-wise multiple regression analysis and was verified to obtain the research results： 1.The perception about the work pressure of the teachers holding administrative offices of elementary schools in Taipei City is around the mediumlevel. 2.Of all the work pressure of the teachers holding administrative offices of elementary schools in Taipei City, the pressure from “the administrative burden” is the largest one. 3.Of all the response tactics of the teachers holding administrative offices of elementary schools in Taipei City, “ resolving problems” is the “most highly agree” one. 4.The research results show that the teachersholding administrative offices with fewer years’ working experience in administration perceive larger work pressure; the teacherswith more years’working experience in administration agree more highly on the response tactics. 5.The teachers holding administrative offices of elementary schoolswith the higher work pressure is, the more often the response tactic of “procrastinating and evading”is applied. 6.In the forecast competence, in terms of the professional competences pressure toward all the aspects of the response tactics of the teachers holding administrative offices of elementary schools in Taipei City, the forecasting functions “resolving problems”, “ reasonable analysis”, “adjusting sentiments” are the best.
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Yang, Ching-Hui, and 楊景惠. "A Study of Relationship between the Teachers Holding Administrative Offices’ Job Pressure and Organizational Commitment of Elementary Schools in Tao-Yuan County." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/83027275574602519818.
Full textAbstract:
碩士國立臺北教育大學
教育經營與管理學系
99
Abstract The purpose of this study is to investigate the present situation and relevance of the teachers holding administrative offices’ job pressure and organizational commitment of elementary schools in Tao-Yuan County, and compare the difference among elementary school teachers’ perceptions of teachers’ organizational commitment and school effectiveness . Moreover, this study makes out the suggestions based on the research results to provide references to educational administration organizations, elementary schools, and the following related researches. Questionnaire investigation is applied in this study. Subjects were 595 teachers holding administrative offices’ in 96 elementary schools in Tao-Yuan County filling out the questionnaires made by the researcher. From those collected 595questionnaires, 533 samples are valid with applicable rate of 92.6%.The data is analyzed in statistics way, inclusive of standard deviation, t-tests, One Way ANOVA, Pearson Product-moment correlation, regression model and etc. Main conclusions made up from the research are as the following: 1. “Interpersonal relationships”,” professional knowledge”, “work load” and “inherent conflict” is sources of job pressure of the teachers holding administrative offices. 2. “Organizational commitment”, “efforts will” and “intention to stay” is the organizational commitment major dimension of the teachers holding administrative offices. 3. Elementary school teachers holding administrative offices in Tao-Yuan County have medium perception for teachers’ job pressure, and “work load” is at the best level. 4. Elementary school teachers holding administrative offices in Tao-Yuan County have good perception for teachers’ organizational commitment, and “efforts will” is at the best level. 5. In elementary schools in Tao-Yuan County, teachers holding administrative offices’ job pressure and organizational commitment have low negative correlation. 6. Elementary school teachers holding administrative offices in Tao-Yuan County , “Interpersonal relationships” and “inherent conflict” can effectively predict the organizational commitment. Based on the results from this research, the suggestions are made for the future study, elementary school administrators, elementary schools and supervisors of educational organizations.
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Chang, Yu-Cheng, and 張育成. "The Study on the Work Pressure and the Response Tactics of the Teachers Holding Administrative Offices of Elementary Schools in Taipei City." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/40855353510319133245.
Full textAbstract:
碩士國立臺北教育大學
教育政策與管理研究所
97
The Study on the Work Pressure and the Response Tactics of the Teachers Holding Administrative Offices of Elementary Schools in Taipei City Abstract The present research was aimed at a thorough understanding of the current status of the work pressure and response tactics of the teachers holding administrative offices of elementary schools in Taipei City, analyzing the relation between the work pressure and the response tactics, and simultaneously comparing different situations of the work pressure and the response tactics of teachers with different background factors. According to the research findings, the researcher presents his suggestions to further respond to various kinds of work pressure and promote the administrative efficiency. The present research adopted questionnaire survey and took the teachers holding administrative offices of elementary schools in Taipei City as subject. The sample number was 97 elementary schools and in totality 734 teachers. 597 copies of questionnaires were recovered and the recovery rate amounted to 81.3%. The number of the effective questionnaires was 548 with a valid rate at 74.7%. The research tool was “the questionnaire survey on the work pressure and response tactics of the teachers holding administrative offices of elementary schools in Taipei City”. The data was analyzed by using descriptive statistics and Pearson Product-moment correlation, step-wise multiple regression analysis and was verified to obtain the research results as follows: 1. The perception about the work pressure of the teachers holding administrative offices of elementary schools in Taipei City is around the medium level. 2. Of all the five aspects of the work pressure of the teachers holding administrative offices of elementary schools in Taipei City, the pressure from “the administrative burden” is the largest; in the next place in order are “the pressure from the superiors”, “ the pressure from inside”, “people’s interactions”, and “professional competences”. 3. The teachers holding administrative offices of elementary schools in Taipei City take a “highly agree” attitude toward the response tactics to pressure. 4. Of all the five aspects of the response tactics of the teachers holding administrative offices of elementary schools in Taipei City, “ resolving problems” is “most highly agree”; in the next place in order are “ reasonable analysis”, “ seeking for help”, “ adjusting sentiments”, and procrastinating and evading”; 5. In the aspect of the background factors of the teachers holding administrative offices of elementary schools in Taipei City, there’s a divergence in terms of the work pressure and the response tactics. The research results show that the younger and unmarried teachers holding administrative offices with fewer years’ working experience in administration and service and without enough support from their family perceive larger work pressure; the senior and married teachers with kids and degrees in the graduate schools holding administrative offices with more years’ working experience in administration and service and with enough encouraging supports from their family agree more highly on the response tactics. 6. By the teachers holding administrative offices of elementary schools with a higher overall work pressure, the level of the response tactics applied is not at all higher. Of all the five aspects of the work pressure, the pressure from “the administrative burden” “the pressure from the superiors”, “the pressure from inside”, “people’s interactions”, and “professional competences”, the larger the work pressure is, the more often the response tactic of “procrastinating and evading” is applied. 7. In the forecast competence, in terms of the professional competences pressure toward all the aspects of the response tactics of the teachers holding administrative offices of elementary schools in Taipei City, the forecasting functions “resolving problems”, “ reasonable analysis”, “adjusting sentiments”, and procrastinating and evading”; are the best. Key words: the elementary schools, teachers, holding administrative offices, work pressure, response tactics.
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Wu, Shih-hsiung, and 伍世雄. "The Study on the Work Pressure and the Response Tactics of the Teachers Holding Administrative Offices of National High Schools and Vocational Schools." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/42646984586220350899.
Full textAbstract:
碩士國立屏東教育大學
教育行政研究所
100
The present research was aimed at a thorough understanding of the current status of the work pressure and response tactics of the teachers holding administrative offices of national high schools and vocational schools, comparing different situations of the work pressure and the response tactics of teachers holding administrative offices of national high schools and vocational schools with different background factors, and simultaneously understanding the relation between the work pressure and the response tactics. According to the research findings, the researcher presents his suggestions to strengthen the capabilities in responding to the work pressure and promote the administrative efficiency and the health of body and mind. The present research adopted questionnaire survey and took the teachers holding administrative offices of national high schools and vocational schools as subject. The sample number was （17 ） national high schools and （ 18 ）national vocational schools and in totality （ 420 ）teachers. （376 ）copies of questionnaires were recovered and the recovery rate amounted to （89.55% ）. The number of the effective questionnaires was 357 with a valid rate at （94.95% ）. The research tool was “the questionnaire survey on the work pressure and response tactics of the teachers holding administrative offices of national high schools and vocational schools”. The data was processed by using frequency distribution and percentage, mean and standard difference, t-test, ANOVA, Pearson Product-moment correlation to obtain the research results as follows. 1. The teachers holding administrative offices of high schools and vocational schools generally perceive the work pressure. 2. Confronted with pressure, the teachers holding administrative offices of high schools and vocational schools adopt the response tactic “resolving problems” more often. 3. In the aspect of the different background factors, the teacher holding administrative offices with 5 less years’ working experience in administrative and service perceive larger work pressure. 4. In the aspect of the different background factors, the teachers with degrees in the graduate schools （master’s or doctoral degrees）and with 16 more years’ working experience in service apply the response tactics more often. 5. By the teacher holding administrative offices of National high schools and National vocational schools with lower work pressure, the level of the response tactics applied is higher.
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WANG, SU-YING, and 王素英. "The Research on the Work Pressure and the Response Tactics of the Teachers Holding Administrative Offices of Elementary Schools--A Case Study of Kaohsiung Yuntuan Schools." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/5m78yr.
Full textAbstract:
碩士國立屏東大學
教育學系碩士班
103
The purpose of this study is to explore the status quo of work pressure and perception and response tactics of facing pressure of elementary teachers who additionally take administrative position and the relationship between them, and to comprehend the decision and influence of work pressure and response tactics of those teachers with different background variables. The research applied questionnaire survey with self-compiled as research instrument to investigate administrative teachers in Kaohsiung Yuntuan Elementary school, which received totally 19 effective questionnaires. According to the results of data analysis, the conclusions were brought forth as follows: This study is Yuntuan elementary teachers who additionally take administrative position hereby abbreviated as administrative position. 1. Perception of role pressure among administrative teachers: the number of administrative teachers who feel high pressure is 8, the ones who feel medium pressure is 10, while the one who feels low pressure is only1. 2. The priority of role pressure of administrative teachers is “work burden”,“time pressure”,“the pressure from inside and professional competences”and “people's interactions”,inclusive of 5 aspects. 3. Coping strategies of work pressure among administrative teachers can lead to reasonable thinking, seeking for support, problem solving, adjusting sentiments,procrastinating and evading and others. The priority of taking response tactics is problem solving, seeking for support, adjusting sentiments and reasonable thinking, while none of them procrastinating and evading. 4. Personal background variables that influence response tactics among administrative teachers: gender, age, marriage, salary and other personal variables；the most influence is age, marriage and salary, the minor one is gender, while other personal variables have little influence. 5. The outside variables that influence response tactics among administrative teachers: school size/student numbers, school feature, school atmosphere, leadership style of school president. The most influence is leadership style of school president, the minor one is school atmosphere, school size/student numbers is at third place, while school feature has little influence. In the end, the author provided relevant suggestions based on the conclusions for administrative teachers, schools, school presidents, educational authorities and units and future researchers to make a reference.
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Lyu, Jheng-Guei, and 呂政圭. "A Study on the Relationships among Working Pressure,Social Support and Organizational Citizenship Behavior of the Elementary School Teachers Concurrently Holding Administrative Position– Take Changhua County for example." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/56639702244173449528.
Full textAbstract:
碩士國立彰化師範大學
商業教育學系
98
This study focuses on investigating working pressure, social support and organizational citizenship behavior of elementary school teachers who hold concurrnet administrative positions in Changhua County. The questionnaire was distributed to 325 participants and the number of responses is 303 which represents about 93.2% return rate. Analyzing by descriptive statistic, t-test, One-way ANOVA, and Enter regression, it comes out the results as bellows. 1.In working pressure part, teachers holding concurrent administrative positions experience the strongest pressure in “professional knowledge”. 2.In social support part, teachers holding concurrent administrative positions experience the strongest emotional support. 3. In organizational citizenship behavior part, teachers highlight the importance of obeying the law. 4.Teachers’ experience in working pressure is varied because of different age, years of teaching, years of holding administrative positions, the size of the school and marriage status. 5.Teachers’ experience in social support is varied because of different gender, the size of the school and teacher’s marriage status. 6.Teachers’ experience in organizational citizenship behavior is varied because of different gender, age, years of teaching, years of holding administrative positions, the size of the school, holding concurrent administrative positions and marriage status. 7.Reducing working pressure and increasing social support both benefit the promotion of teachers’ organizational citizenship behavior. Keywords: Elementary School Teachers Concurrently Holding Administrative Position, Working Pressure, Social Support, Organizational Citizenship Behavior