• Journal of Industrial Technology
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• v.31 no.B
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• pp.99-105
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• 2011

Recently, smartphones have been widely used in wireless communications which caused severe data overload in cellular networks. Cellular companies consider increasing wireless data capacity in overloaded areas. Determining overloaded areas is mainly made from user reports which are currently collected by calling or simple apps by some active users experiencing overloads. Since the current reporting method is inconvenient and does not contain detail information about the overload conditions, and therefore is used by only some active users, the overloaded areas determined from the reports are not likely to be accurate. Therefore, we need a new reporting method which is convenient enough for even inactive users to willingly report the overload condition and which delivers detail information about the overloads. In this paper, we design and implement a measurement function of smartphone's WCDMA communication quality including overload condition and management system of mobile wireless communication networks about smartphones' communication quality.

• International Journal of Advanced Culture Technology
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• v.8 no.3
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• pp.73-83
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• 2020

In this study, the stress and experience of overcoming stress by on-site missionaries who rescue North Korean defectors was investigated in depth through a phenomenological approach. To this end, 7 missionaries with more than 5 years of experience in North Korean missionary mission were selected, and in-depth interviews and written interviews were conducted once. The collected data were analyzed through the phenomenological research methods of Giorgi and Colaizzi. The results were categorized into 'calling and obedience', 'mission and stress', 'anxiety situation and stress', 'stress situation and frustration', 'stress experience and psychological change', 'self insight and overcoming stress', 'resolution and recovery of stress', and 'new determination and rededication'. By researching and analyzing the stress and stress experience of the missionaries who rescue North Korean defectors in the field, this study has significance for helping missionaries continue to help them through managing and overcoming their stress.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.398-401
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• 2001

This paper presents rough cutting pat고 drilling. This method has differences from conventional method which uses boundary curve by intersecting object to machine and each cutting plane. Die-cavity shape is drilled in z-map, we select various tool and remove much material in the short time. as a result, this method raise productivity. The major challenges in die-cavity pocketing include : 1)finding an inscribed circle for removing material of unmachined regions, 2) selecting optimal tool and efficiently arranging tool, 3) generating offset surface of shape, 4) determining machined width according to the selected tool, 5) detecting and removing unmachined regions, and 6) linking PJE(path-joining element). Conventional machining method calling contour-map is compared with drilling method using Z-map, for finding efficiency in the view of productivity.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2010.05a
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• pp.201-205
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• 2010

Earthwork is an essential initial work discipline in construction projects and open to significant impacts of several factors such as weather, site conditions, soil conditions, underground installations and available construction machinery, calling for careful planning by managers. However, selection and combination of construction machinery and equipment for earthwork still depends on experience or intuition of managers in construction sites, with much room left for proper management in terms of cost, schedule and environmental load control. This research aims to analyze the performance of earthwork equipment and establish relations among various factors affecting a model for optimizing selection and combination of earthwork equipment as a precursor to the development of such model. We expect the conclusions herein to contribute to optimizing selection and combination of earthwork equipment and provide basic inputs for the development of applicable model that can save costs, reduce schedule and mitigate environmental load.

• Proceedings of the KIEE Conference
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• 1999.07c
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• pp.1164-1166
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• 1999

This paper presents Static Synchronous Series Compensator(SSSC) model for power flow study using IPLAN. In the proposed model, SSSC is represented by the equivalent load variation. The equivalent load consists of active power load specified by user and reactive power load which is founded for considering characteristic of SSSC. And this is implemented by IPLAN which is a macro-external program for PSS/E. Using this model, SSSC can be solved in load-flow by just calling the model in PSS/E. The proposed model was applied to a realistic power system for validity test.

• Research in Mathematical Education
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• v.17 no.3
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• pp.181-198
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• 2013

Teaching and learning mathematics in a classroom setting is based on the interactions between the teacher and her students. Using classroom observations and interviews of students and the teacher, this research examines a first-year teacher and her students' interactions in the mathematics classroom. In this mathematics classroom, teacher and students interaction had inconsistency between mathematical topics and non-mathematical topics. For non-mathematical topics, their interactions were very active but for mathematical topics their interactions were very limited. This paper ends with raising questions for future research and calling for the opportunities for first-year teachers to reflect on their interactions with their students, in particular about mathematical topics.

• Journal of Fisheries and Marine Sciences Education
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• v.26 no.4
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• pp.717-735
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• 2014

This study aims to develop and validate the WSSECT (Workplace Spirituality Scale for Early Childhood Teacher) through literature review and statistical tests. The initial version with 40 items based on two dimensions of spirituality in individual and professional level was constructed. Then, it was revised twice for improving reliability and validity. Finally the WSSECT was constructed of 4 factors - i.e. 'calling for ECE teacher job', 'meaning for life', 'membership in educational community' and 'awareness of inner life' - including the 23 items. The scale will be expected to identify workplace spirituality of early childhood teacher.

• Journal of Preventive Medicine and Public Health
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• v.10 no.1
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• pp.59-61
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• 1977

We are calling the erupting ground water as drugwater or mineral water in Korea and thinking those water is good for health from ancient. But most of them were used by mountainer as drinking water and food making water. Authors tried to investigate the evidence of contamination by user on the 10 erupting ground water and gained following results: 1. All of the mineral, waters on 10 area in Seoul were unfitable to drinking water standard. 2. In the view of the bacteriology 80% were contaminated by coliform group. 3. The highest value of the free carbon dioxide contents were 652.96 ppm at Sam Sun Mineral Water.

• International Journal of Advanced Culture Technology
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• v.6 no.3
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• pp.216-225
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• 2018

Strangely enough, there has not been much effort in applying the latest technologies to help referees make accurate calls in a soccer game compared to other sports. Modern soccer tries to apply VAR (Video Assistant Referee) technology to correct inaccurate calls such as an offside, but this is being put off due to the fact that real time decision-making cannot be carried out by using this technology. This has led this study to decide developing a device that will accurately identify offsides on a real time basis using various latest sensors and related technologies. This device will aid referees in calling offsides in a soccer match.

• Journal of the Korean Home Economics Association
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• v.32 no.4
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• pp.233-240
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• 1994

The purpose of this study is to consider psycological funtions of mourning dresses in Confucianism. By each step of A.V.Gennep's passage rites, the result of this thesis summarised as follow; In the first Seperation rites after calling the death' name three times the relatives for whom mourning is due become dishevelled hair bare feet and bare shoulder etc. In the second Transition rites, bereaved familly has worn 5 class mourning dresses in deep grief. In the third Cooperation rites, gradually the living familly goes through three year stages of changing mourning dresses to ordinary colthes. In Confucian funeral ceremony the deviation of clothing behavior in each mourning step sublimates bereaved person's sorrow into their internal security.