• Title/Summary/Keyword: working face

Search Result 324, Processing Time 0.024 seconds

Study on the Surface Electric Resistance for Inner COnductive Film in CRT Funnel (브라운관 Funnel Glass 내면의 흑연피막의 표면전기저항에 관한 연구)

  • 김상문;김태옥;신학기
    • Journal of the Korean Ceramic Society
    • /
    • v.35 no.11
    • /
    • pp.1155-1161
    • /
    • 1998
  • We have studyed the surface electric resistiance for inner conductive film consisted of graphite and iron oxide by coating the conductive paint on inner face of 28" wide CRT funnel and have evaluated the working properties of 28" wide CRT according to the surface electric resistiance. We found that the viscosity of paint and the thickness of conductive film became the higher but the surface electric resistiance of con-ductive films was the lower than before in accordance with the increase of solid contents in conductive paint and that the surface condition and the surface electric resistiance of conductive films changed highly ac-cording to the drying conditions also. From these results we could get the uniform thickness and the un-iform film resistance and the optimum working property of selectric propertise in CRT when we used the conductive paint with solid contents 28% and viscosity about 13cps.

  • PDF

Construction Safety Training Methods and their Evaluation Approaches: A Systematic Literature Review

  • Ojha, Amit;Seagers, Jonathan;Shayesteh, Shayan;Habibnezhad, Mahmoud;Jebelli, Houtan
    • International conference on construction engineering and project management
    • /
    • 2020.12a
    • /
    • pp.188-197
    • /
    • 2020
  • Due to hazardous working environments at complex, unstructured, and dynamic construction sites, workers frequently face potential safety and health risks throughout the construction process. In this regard, addressing safety challenges remains one of the top priorities. Construction workers' ability to identify and assess risks is acquired through training, which is one of the primary key factors to determine their safety and wellbeing in hazardous working environments. As such, safety managers constantly focus on the effectiveness of the training materials provided to the workers. However, the construction workers are considerably at greater risk of injuries and fatalities compared to the workers in other industries. In this regard, further studies are required to build up a body of knowledge on the conventional safety training approaches as well as their evaluation techniques in order to boost up the adoption by the practitioners in a widespread manner. This paper provides a systematic review of the current safety training approaches and the various techniques for measuring their effectiveness. The attributes of the current safety training methods for construction workers and their evaluation techniques are identified and analyzed. Results indicated that: 1) immersive environment-based training methods are effective than the traditional safety training methods; 2) this effectiveness can be empirically supported by evaluation strategies, but the current techniques are subjective, intrusive, and error-prone. This research offers fresh opportunities to investigate the training strategies by objectively monitoring the physiological responses of construction crews. The results of this study can be used by researchers and practitioners to identify and determine optimal safety training programs that could potentially become ubiquitous in the construction industry.

  • PDF

The Effect of COVID-19 Pandemic on University Libraries: Forced on the Perception of University Librarians (코로나 19가 대학도서관에 미치는 영향에 관한 연구 - 대학도서관 사서의 인식을 중심으로 -)

  • Chung, Jae-Young;Oh, Se-Hoon
    • Journal of the Korean BIBLIA Society for library and Information Science
    • /
    • v.32 no.3
    • /
    • pp.93-114
    • /
    • 2021
  • COVID-19 has been affecting the library, not to mention society as a whole. Especially, there are many changes in the role and service of the university libraries as all the classes of the universities are turned into non-face-to-face and the use of the university libraries is restricted. The changes in users' use of information and communication behavior due to COVID-19 could be an opportunity for new utilization of human and material resources the university libraries have and for the development of services. However, on the contrary, the university libraries could face another crisis if they fail to respond appropriately to current changes. Therefore, it is necessary to grasp, analyze the impact of COVID-19 and plan how to respond. A survey on the effects of COVID-19 and the response of the university libraries and the perceptions of the university libraries found that most university libraries are responding appropriately to COVID-19. However, a survey on the perceptions of the present and future of the university libraries under COVID-19 showed that many survey respondents think COVID-19 would have a negative impact on the university libraries. This means that the changes caused by COVID-19 are causing a crisis and anxiety in the university libraries. Therefore, by working hard together, the university libraries need to present the university libraries' new role, service and direction in the post-COVID-19 era as well as responding to the current situation.

Process Development of Rotor Shaft using a Large Friction Welding (대형마찰용접을 이용한 로타샤프트 제조공정개발)

  • Jeong, H.S.;Cho, J.R.;Lee, N.K.;Park, H.C.;Choi, S.K.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2007.05a
    • /
    • pp.401-404
    • /
    • 2007
  • Inertia welding is a solid-state welding process in which butt welds in materials are made in bar and in ring form at the joint face, and energy required for welding is obtained from a rotating flywheel. The stored energy is converted to frictional heat at the interface under axial load. The quality of the welded joint depends on many parameters, including axial force, initial revolution speed and energy, amount of upset, working time, and residual stresses in the joint. Inertia welding was conducted to make the large rotor shaft for low speed marine diesel engine, alloy steel for shaft of 140mm. Due to different material characteristics, such as, thermal conductivity and flow stress, on the two sides of the weld interface, modeling is crucial in determining the optimal weld geometry and parameters. FE simulation was performed by the commercial code DEFORM-2D. A good agreement between the predicted and actual welded shape is observed. It is expected that modeling will significantly reduce the number of experimental trials needed to determine the weld parameters.

  • PDF

A Case Study on Designing a Console Design Review System Considering Operators' Viewing Range and Anthropometric Data

  • Cha, Woo Chang;Choi, Eun Gyeong
    • Journal of the Ergonomics Society of Korea
    • /
    • v.36 no.5
    • /
    • pp.373-383
    • /
    • 2017
  • Objective: The aim of this study is to introduce an operator console design review system suitable for designing and evaluating consoles based on human factor guidelines for a digitalized main control room in an advanced nuclear power plant which has a requirement for anthropometric data usage. Background: The system interface of the main control room in a nuclear power plant has been getting digitalized and consists of various consoles with many information displays. Console operators often face human-computer interactive problems due to inappropriate console design stemming from the perceptual constraints of anthropometric data usage. Method: Computational models with a process of visual perception and variables of anthropometric data are used for designing and evaluating operator consoles suitable for human system interface guidelines, which are used in an advanced nuclear power plant. Results: From the computational model and simulation application, console dimensions and a designing test module, which would be used for designing suitable consoles with safety concerns in a nuclear power plant, have been introduced. Conclusion: This case study may influence employing a suitable design concept with various anthropometric data in many areas with safety concerns and may show a feasible solution to designing and evaluating the safety console dimensions. Application: The results of this study may be used for designing a control room with the human factors requiring a safe working environment.

The influence of women's underwear attitude on image-making efficacy and appearance management attitude (여성의 속옷태도가 이미지메이킹 효능감과 외모관리태도에 미치는 영향)

  • Park, Eun-Hee;Ku, Yang-Suk
    • Journal of the Korea Fashion and Costume Design Association
    • /
    • v.20 no.1
    • /
    • pp.79-91
    • /
    • 2018
  • The objective of this study was to determine the influence of women's attitudes toward women's underwear on image-creation efficacy and appearance management attitude. A total of 405 surveys of women working at an industrial complex in the Daegu-Kyoungbuk area were used for data analysis. Frequency, factor analysis, reliability analysis, and regression analysis were used for data analysis. The findings were as follows. The sub-factors of women's attitudes regarding women's underwear were found to be 'aesthetics/body-style compensation', 'ostentation', 'functionality', and 'manner estimation' and the sub-factors of image-making efficacy were 'display confidence', 'face-image confidence' and 'display ability'. Appearance management attitude had factors such as total coordination, weight management, skin management, and pursuit of change. Aesthetics/body-style compensation, functionality, and ostentation, which were sub-variables of attitudes toward underwear, had a significant influence on image-creation efficacy. Aesthetics/body-style compensation and ostentation had significant influences on appearance management attitude. Aesthetics/body-style compensation was found to have a significant influence on all sub-variables of both image-creation efficacy and appearance management attitude.

China's Reorganization of Maritime Law Enforcement Administrations and ROK-China Maritime Cooperation (중국 해상법집행기관조직 개편과 한·중 해양협력)

  • Kim, Seok-kyun
    • Strategy21
    • /
    • s.33
    • /
    • pp.178-201
    • /
    • 2014
  • China National People's Congress has passed the bill to combine the Marine Law Enforcement into "State Oceanic Administration People's Republic of China". This bill was intended to resolve the overlapping jurisdiction and disputes caused in ocean territory in nearby countries. The purpose of reorganizing the administration was to combine the dispersed organization into one group. This new big administration was basically organized to increase the power of China marine state on the long-term. The reorganization plan is to group General Administration of Customs, China Marine Surveillance, Fisheries Law Enforcement Command, and Border Control Department into one State Oceanic Administration. The new state Oceanic Administration carries the authority to protect rights and enforce the marine law supported by Public Security Bureau. Korea Coast Guard has been cooperating with China Marine Surveillance since 1998 when the first pact was made. The next step expanded to General Administration of Customs. Currently working with Regional Maritime Law Enforcement organizations dealing mostly with illegal Chinese fishing boats and IEODO conflict. In order to solve the problems we face today is to observe the process of the New China Coast Guard administration, analysing the effects that could be caused by the change and to keep close cooperation between the new administrations.

Development of the Reading Guidance Course for Strengthening Core Competencies among College Students (대학생의 핵심역량 강화를 위한 독서지도 과목 개발에 관한 연구)

  • Lee, Myeong-Hee
    • Journal of the Korean Society for Library and Information Science
    • /
    • v.46 no.3
    • /
    • pp.79-102
    • /
    • 2012
  • Higher educational institutions face an increasing demand for developing a renewed set of competencies of college students who will live in the knowledge-based society. However, relatively little is known about what constitutes the core competencies that college students need to develop and how we can improve them. Nine categories of core competencies required for college graduates were drawn from the previous research and examples of core competencies developed by other institutions. They are analytic thinking skills, problem-solving skills, communicating skills, collaborative working skills, and etc. A reading guidance course for strengthening core competencies, developed based on the teaching and learning methods was adapted to students of LIS for one semester. Implications of these and related findings are discussed.

Anti-Sway System of Container Transfer Crane for Automated Container Terminal : Part I - Basic Structure, Modeling and Control (자동화 컨테이너 터미널을 위한 컨테이너 트랜스퍼 크레인의 안티 스웨이 시스템;Part I - 기본 구조, 모델링, 제어)

  • 박찬훈;김두형;신영재;박경택
    • Journal of Institute of Control, Robotics and Systems
    • /
    • v.10 no.11
    • /
    • pp.1112-1118
    • /
    • 2004
  • Automated container terminals have been developed over the world years and many countries are interested in them because the amount of containers exported or imported is rapidly increasing. The conventional container terminals were not designed to handle this kind of heavily many containers. They would face many structural problems soon or later, although they have been managed to do well so far. One of the most important things in automated container terminal is the handing equipments able to transfer many containers efficiently. Those are maybe automated transfer cranes, automatic guided vehicles and automated quay-side cranes. The word 'automated' means the equipment is operated without drivers and those equipments are able to work without any interruption in working schedule. Through the researches on the conventional transfer cranes, we decided that the structure of conventional transfer cranes is not proper in automated container terminal and it is not possible to handle so many container in limited time. Therefore we have been studying on the proper structure of the automated container for past several years and a new type of transfer cranes has been developed. Design concept and control method of the new crane are introduced and experimental results are presented in this paper.his paper.

A Study on Experience of Transition from New Clinical Nurse to Competent Step (임상 신규간호사의 상급 초보자에서 적임자로 되어가는 경험)

  • Park, Kwang-Ok;Kim, Jong Kyung
    • The Journal of Korean Academic Society of Nursing Education
    • /
    • v.19 no.4
    • /
    • pp.594-605
    • /
    • 2013
  • Purpose: This study aimed to describe nurses' experience in transition from new graduate nurses to professional clinical nursees in a hospital. Methods: Ten new clinical nurses working in a hospital participated in this study. Data collected through in-depth interviews were analyzed using phenomenology. Results: The analysis yielded five core category themes from new nurses for becoming a professional nurse: (a) beginning of hardship journey (b) feeling of inability in workplace (c) struggling hard to develop skills (d) enduring hardships by soothing oneself and peer support (e) beginning of an exciting journey. Conclusion: Over time, new nurses face many difficulties in transition to a professional status. To enhance the role development of new clinical nurses in hospital settings, nursing schools and clinical fields must teach and prepare them. Nursing schools should teach a strong theoretical base as well as nursing skills. In addition, in the clinical nursing department, education, teaching the integrated systems, staff development, support, evaluation, and feedback are needed for new nurses's development.