• Nuclear Engineering and Technology
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• v.50 no.7
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• pp.1017-1023
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• 2018

The measurement and calculation of neutronic parameters in nuclear research reactors has an important influence on control and safety of the nuclear reactor. The power peaking factors, reactivity coefficients and kinetic parameters are the most important neutronic parameter for determining the state of the reactor. The position of the control shim safety rods in the core configuration affects these parameters. The main purpose of this work is to use the MTR_PC package to evaluate the effect of the partially insertion of the control rod on the neutronic parameters at the operating core of the Tehran Research Reactor. The simulation results show that by increasing the insertion of control rods (bank) in the core, the absolute values of power peaking factor, reactivity coefficients and effective delayed neutron fraction increased and only prompt neutron life time decreased. In addition, the results show that the changes of moderator temperature coefficients value versus the control rods positions are very significant. The average value of moderator temperature coefficients increase about 98% in the range of 0-70% insertion of control rods.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.12
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• pp.371-376
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• 2021

The article analyzes the impact of factors affecting the internal control system of chemical enterprises in Vietnam, providing more empirical evidence on factors affecting the system of internal control. Research data is collected in the form of face-to-face interviews and email interviews with managers and employees working in different positions, managers at all levels, chief accountants, and accountants of 52 chemical enterprises in Vietnam. The survey results collected 310 questionnaires. After eliminating the invalid questionnaires due to many blank cells, the authors chose to use 297 questionnaires. Quantitative research was carried out with SPSS 25 software. Research results show that Business Strategy, Organizational Structure, Organization's perception of the instability of the external environment, and Organizational culture are the factors that positively affect the internal control system of chemical enterprises. This can be explained that, for chemical enterprises, Business strategy, Organizational structure, Organization's perception of the instability of the external environment, and Good organizational culture will positively impact the internal control system of chemical enterprises. Based on the research results, the authors have proposed recommendations to enhance the effectiveness of the internal control system of chemical enterprises in Vietnam, thereby contributing to improving the performance of enterprises in the chemical Vietnamese.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2007.11a
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• pp.58-63
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• 2007

Recently, as the management environments are changing rapidly and the uncertainty is becoming larger, the needs of internal control for management and IS become stronger. In order to construct a new internal control system for IS, it is necessary to evaluate the former research of the system. This study emphasizes the importance of effective internal control system, presents a conceptual framework for the preceding factors to consider, and verifies empirically the framework. This study sets the organization citizenship behavior, IS innovation resistance, and IT capability from the viewpoint of Socio-Technical system as the preceding factors for the effectiveness of internal control system. A research model, affecting the above factors on IS capability as a mediating variable of the internal control effectiveness for the use of IS, is set up. PLS-Graph 3.0 is used to verify the model. We found that the internal control effectiveness have affirmative effect on information capability, a surrogate variable of the IS effectiveness and a mediation effect is meaningful.

• Journal of the Korean earth science society
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• v.23 no.8
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• pp.659-665
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• 2002

The purpose of the study is to investigate the effects of portfolio on the organization and the quantity of the students’ science concepts. Two fourth grade classes were selected from an elementary school in Pyungtaek-shi, Kyunggi-do, and one class is assigned to experimental group, the other control group. Experimental group received portfolio teaching, and control group received conventional instruction. The effects of portfolio teaching were investigated with students’ mind maps. Students participated had training to develop mind maps, and developed mind maps four times during learning two units, strata and fossils, and change by heat. Mind maps developed by students were scored and analyzed with SPSS. The class with portfolio instruction showed higher scores than control group. In conclusion, the portfolio teaching enhances the organization and the quantity of students’ science concepts.

• Journal of Korea Society of Digital Industry and Information Management
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• v.10 no.4
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• pp.1-9
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• 2014

Recently, with the enlargement of cloud computing, virtual desktop infrastructure(VDI) can be an alternative of the existing personal computer based information environment. For the case of partially introduced VDI coexisting with personal computer environment, we suggest a virtual folder based approach to control the overall digital contents within an organization with a case of implementation. Although a centralizing device was used for storage and sharing of organization's digital contents, it was not easy to accomplish centralizing digital contents completely. It is tried to prevent users from utilizing their own storage in their personal computers or virtual machines and to use virtual folder which transfer and store digital contents to and in EDMS. The virtual folder system of this paper looks like a real folder in a personal computer, but it is another virtual device for outer storage devices including EDMS. It can be an alternative and reference of digital contents control for future applications of cloud computing.

• Journal of the Korean association of regional geographers
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• v.13 no.5
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• pp.495-508
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• 2007

This study pays attention to the organization of local-level farming group, which has been recognized as a solution to the problems of agriculture and rural area with their crisis deepened by the coming of FTA. More specifically, this study analyzed each farming household's understanding of the farming group organization of fruit nursery tree growing region, and their participational behavior types. As a result, it is revealed that the organization of farming group oriented to enhance its competence must aim to realize its economic benefits rather than to maintain the social relationship among the members of organization. Also it has to orient itself not to abstract causes but to more concrete and practical objects. In addition, the farming group must be organized based on the identity of growing farm product, and in respect of the reliability among the members, there must be a proper level of control that makes the internal control and the harmonious interaction among the members to be possible.

• Journal of the Korean Society of Safety
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• v.11 no.1
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• pp.121-128
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• 1996

Estimating the cost of injuries and "accidents" to an organization is very important to figure out about how much well each organization has run his company and how much efficiently he has got the results using a certain amount of the expense for safety. Despite the potential usefulness to management of information as to the cost of a company's "accidents", it is not customary accounting practice to make these data available. Of the two general kinds of costs forced on a company by its occupational injuries and "accidents", the insurance cost and uninsured cost, -the former is by far the easier to find out. But actually, this uninsured cost should be figured out at each company. Authors have designed the generalized model to figure out the above problem costs to establish its efficient safety control. One construction company has been a pilot for this study. It is found that efficient safety control cost should be 1.2%~l.3% of total selling amount by analyzing actual data for three years.g actual data for three years.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.228-230
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• 2004

ZigBee Alliance is a network designed for low-cost and very low-power short-range wireless communications. The ZigBee Alliance is a consortium formed by several leading semiconductor and industrial manufactures, and end users. One of the tasks of this organization is the definition of the networking support and applications profiles that will use IEEE Std 802.15.4-compliant transceivers. In the case of IEEE Std 802.15.4, the ZigBee Alliance is an organization that has led the development of the upper layers, through the definition of application profiles. We have implemented ZigBee home control system, however we have not fully implemented. Because of the ZigBee is not perfectly standarded. We will have to implement according to ZigBee Specifications.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1638_1639
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• 2009

This paper propose a mobile robot for the obstacle avoidance control. The proposed method based on self-organization method is a way to escape of obstacle. Optimal path planning and obstacle avoidance, depending on its final goal will arrive at exactly the mobile robot. Simulation results show the validity of the proposed method.

• Journal of Korean society of Dental Hygiene
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• v.13 no.2
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• pp.249-260
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• 2013

Objectives : To figure out the status of infection control (IC) in dental healthcare field and to propose the way for improvements through assessment about cognition of the clients. Methods : Study subjects were 151 patients who visited H dental health organization (DHO) of the four DHO in Busan city. The questionnaire survey performed from November 10 to December 7, 2010. Results : 1. 43.0% of consumers were interested in perception and experience in the infection control, and 38.4% were related behavioral changes in the infection control. 2. In the clients survey, the major considerations about the performance for IC were hand washing(73.5%). 3. There was significantly higher in middle-aged to think for ages infection prevention behaviors recognized as important to wear safety glasses. 4. In the confidence for dental care organization according to gender and age, appearance and outfits of staffs was the highest major consideration items. Conclusions : Infection control closely related to the clients' satisfaction and credits, therefor changing of interest, cognition and attitude for the client's IC have to be emphasized.