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Analysis of Water Storage Tank Flowfield using Computational Fluid Dynamics (CFD) Simulation (전산유체역학(CFD)을 이용한 저수조 내부 유동장 해석)

  • Choi, Yeon-Woo;Han, Min-Su;Song, Jun-Hyuck;Wang, Chang-Keun
    • Journal of Korean Society on Water Environment
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    • v.34 no.2
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    • pp.173-182
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    • 2018
  • Reservoirs, facilities to store water, are being used in several fields for their ability to hold back a large quantity of water for a long time before the water is actually used. However, at the same time, the reservoirs are considered to have a flaw: the longer they store water, the more the quality of water in these reservoirs deteriorates. Further, when the reservoirs are large, they are more likely to have dead-water regions in out-of-the way spots far from either an in-current or an ex-current canal. This study conducted a Computational Fluid Dynamic (CFD) simulation and tried to figure out the internal flow inside each of the reservoirs with different in-current canals built by the multiple hoe screw nozzle method and the drop in-current method. The drop in-current method is more frequently used. According to the analysis of the internal flow inside each reservoir with the different methods applied, we found that the reservoir with the drop in-current canal would have two rotary currents in the lower region of the reservoir and that the velocity of flow would decrease. For a reservoir with the screw nozzle method, a single rotary current occurred, and inside the reservoir, regardless of height, the current turned out to flow in a regular manner.

A Study of Correctional Education for Juvenile Delinquents in Korea (우리나라 소년범(少年犯) 교정교육(稿正敎育)의 실태(實態) 문제점(問題點))

  • Kim, Kyung-Hoe
    • Korean Security Journal
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    • no.1
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    • pp.1-16
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    • 1997
  • Nowdays the prison is the only correctional for juvenile delinquents not to be the second offenders in Korea. Originally the correctional education aims to let criminals go back to the society as a decent citizen after correcting them and prevent them from comminitting crimes repeatedly. Being considered to increase the second offenders in juvenile delinquency, the purpose of this study is to investigate the actual condition and problems of juvenile correctional education in Korea and to find out the solution of problems. First of all, this study examines the actual condition of the juvenile delinquency in Korea. The number of juvenile crimes has been increased from 1985 to 1995. In 1997, the current education in correctinal institutions for juvenile delinquents is inferior to that of developed countries. On the basis of this investigation, improvement plans which will be fit for the circumstances in Korea are suggested. The conclusion of this study are summarized as follows 1. Correctional institutions will be improved to accommodate the proper number of convicts. 2. Correctional officers should be qualified proffessinals who can achieve the aim of correctional education successfully. 3. In order to cultivate he social adaptability of convicts, the expansion of open prison is needed. 4. It is neccessary to classify convicts by means of moderized and scientific methods. 5. Correctinal education consist of various practical courses on jobs, After complenting these vocatinal training, the convict can obtain certificates. 6. The government has to has to plan policies that the released convicts can get jobs for living. 7. Owing to keeping prisons sanitary, it is very helpful for convicts to have thebelief that they are not abandoned by the member of their society. 8. Convicts are given opportunities to participate religious activities by their free-will. If above improvement plans are sufficiently accomplished, correctinal education will obtain good results, It is also effective to minimize the repetition of offence by ex-convicts.

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The Effects of Visual and Auditory Feedback on Pain Reduce (시각과 청각되먹임이 통증감소에 미치는 영향)

  • Bae, Young-Sook;Kim, Soon-Hoe;Min, Kyung-Ok
    • Journal of Korean Physical Therapy Science
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    • v.9 no.1
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    • pp.1-8
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    • 2002
  • This study set out to investigate what kind of effects the consistent visual stimuli and verbal and non verbal auditory stimuli have on pain alleviation, as well as to see the influence of joint application of visual and auditory stimuli at the same time on pain alleviation, according to lightness of 50lux and 200lux, ultimately providing basic data in setting up an environment in case of treating pain. The subject were comprised of 30 male and female adults with pain in the neck and back area. The subject were treated in their pain area with Transcutaneous Electrical Nerve Stimulator(TENS) 100HZ for 20 minutes in the research set where each visual, auditory, and joint visual and auditory stimuli was given. For analysis methods, Visual Analogue Scale(VAS) and McGill Pain Questionnaire were adopted to see the changes before and after treatment, and the electrocardiogram, systolic and diastolic pressure, number of heart rate and breathing frequence and endorphin were compared and analyzed using the Wilcoxon singed-rank test. And The Kreskal-walllis test was used to compare the two subgroups from each group. Wilcoxon singed-rank test and the Kreskal-walllis test was used to compare the two subgroups from each group. The results were as follows: 1. The group of 50lux and 200lux were compared given varying degrees of visual stimuli. The group of 200lux showed more reduction in pain points, average systolic and diastolic pressure and average endorphin. 2. The group of verbal and non verbal were compared given varying degrees of auditory stimuli. The group of non-verbal showed more reduction in average systolic and diastolic pressure. 3. The group of 200lux+verbal and 200lux+non verbal were compared given varying degrees of joint visual and auditory stimuli. There was found a statistical significance(p<0.05) in endorphin between the two groups, with more endorphin reduction for 200lux+non verbal group. And there was a statistically significant reduction in VAS and McGill before and after the treatment between the two groups.

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Analysis of the outcome for the Korean Pro-Basketball games using Regression models (회귀모형을 이용한 한국프로농구 승부결과 분석)

  • Jhang, Hyo Jin;Kwak, Hyun;Choi, Seung Hoe
    • Journal of the Korean Institute of Intelligent Systems
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    • v.25 no.5
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    • pp.489-494
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    • 2015
  • The purpose of this paper is to analyse outcomes of Korean Pro-basketball games using regression models. Both Classic Fuzzy Regression Model and Fuzzy Regression Model applying linguistic variables were used to meet the purpose of the paper. In General Regression Analysis, in which the results of games are expressed and analyzed through score differences, a regression model is proposed considering influential variables for the score differences of the two teams. In Fuzzy Regression Analysis, the results are sorted into six different literal expressions, 'win with large margin, win with moderate margin, win with narrow margin, defeat with narrow margin, defeat with moderate margin, and defeat with large margin'. Athletic performances and team work of each teams were expressed in fuzzy number to analyse how much athletic performances and team work affect results of games. This paper referred back to 2013-2014 season data provided by KBL(Korean Basketball League) and professional columns on Korean basketball analysis.

Design and Implementation of RFID Processing Systems for Agricultural Products Traceability (농산물 이력 추적 관리를 위한 RFID 처리 시스템 설계 및 구현)

  • Yeon Dong-Hee;Lee Sang-Jo;Cho Tae-Beom;Min Byung-Hun;Jung Hoe-Kyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2006.05a
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    • pp.931-934
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    • 2006
  • Recently, as the problems related to agricultural product's safety occur continuously, the system with traceability that can quickly trace back the agricultural products with problems occurred and enable the analysis of causes and prohibition of distribution is required. Therefore, the recording of distribution data is important for this system and for this purpose, the RFID technology that can perceive tags from remote place through radio frequency can be effectively used. But, since the RFID is a technology that is being watched recently, the system that processes RFID tags and distribution data is trifling. Hereby, this thesis designed and implemented the RFID processing system that enables the career trace by analyzing and managing the data on recorded RFID tags and career data based on the standard of traceability.

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A Female-Centered Community, Racial Other and Its Alienation in Nadine Gordimer's The Pickup (나딘 고디머의 『픽업』에 나타난 여성중심 공동체와 인종적 타자의 고립화 문제)

  • Kim, Min Hoe
    • English & American cultural studies
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    • v.18 no.3
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    • pp.1-29
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    • 2018
  • Nadine Gordimer's The Pickup, published in 2001, well shows how the social issues have been changed in a way to reflect the South African society which is more complicated in the post-apartheid era. Examining the two different geographical territories between Johannesburg, South Africa and an unnamed nation in Middle East, putting aside the domestic racism between white and black, she extends her issue of racial other to global one with new rising issue of immigration in South African society. It seems that Gordimer's such issue is well represented by two main characters: Julie Summers who comes from a wealthy family and falls in love with Abdu, an illegal immigrant who was born from a poor country in Middle East and is now working at a garage in a downtown of Johannesburg with hiding his real name Ibrahim ibn Musa. Having an official relationship with Ibrahim and joining the regular meeting at the El-Ay (L.A.) Cafe where all participants can enjoy the freedom of expression/speech except for Abdu, she begins to have interest in his silence and his presence, orientalized as the Arab Prince for her imagination. Arriving at Abdu 's nation later, she also keeps projecting the 'less civilized' images to his nation where there are only desert, uneducated people, and dirty houses and streets. In doing so, Gordimer leads reader to a never-ending issue of Orientalism in the Western literature. Moreover, the writer attempts to create a female-centered community at the male-centered Islam community by marginalizing the presence of Abdu who finally leaves to America alone. As Julie is successfully acculturated to the unknown Abdu's community, she begins to place herself at the center of the community and plays a role as a mediator/communicator who can change/civilize it with her western knowledge of language and culture. By replacing the male-centered with the female-centered through Julie, Gordimer seems to be creating an idealized community with the notion of matriarchy. However, Gordimer places Abdu as an unstable subject who has to endlessly move back and forth for his undetermined national and cultural identity while Julie achieves the determined identity in both nations.

A History of the Korean Association for Communication & Information Studies (KACIS) for 20 Years (한국언론정보학회 20년, 비판적 학술운동의 고민과 한계)

  • Kim, Suh-Jung;Kim, Eun-Gyoo
    • Korean journal of communication and information
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    • v.43
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    • pp.47-80
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    • 2008
  • KACIS was established in 1988 for critical academic movement in communication area. For 20 years after establishment, KACIS has grown into major academic society. The purpose of this article is reflection on the history of KACIS for 20 years. For this, this article review three areas on KACIS. First, It examine how critical academic movement that was initiated in middle of 1980s was changed in gear with Korean Society's shift. Second, It turn around the activity of 'Korean study group for society and communication', the predecessor of KACIS, which operate during $1988{\sim}1998$. Third, it consider KACIS's activity after convert to association, during $1998{\sim}2008$. When look back to 20 years of KACIS, first of all, the biggest fruit is to extend critical communication in academic area. However, several controversies exist about KACIS's identity. Conclusively, this article emphasize, for further development, organizing organic academic conference about social pending issue, strengthening journal's identity, fostering future academic generation, vitalizing research divisions.

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A Case Study on Explosives Demolition of the Dongdaemoon Complex Stadium(Baseball field) in Republic of Korea (동대문 운동장(야구장) 발파해체 시험시공 사례)

  • Min, Hyung-Dong;Park, Jong-Ho;Song, Young-Suk;Seo, Young-Su;Kim, Rea-Hoe;Jung, Byeong-Ho
    • Explosives and Blasting
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    • v.26 no.1
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    • pp.23-37
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    • 2008
  • The Dongdaemoon complex stadium is scheduled to remodelled into an international park, which will be named Design Plaza. The Dongdaemoon baseball field was constructed with Rahmen Structure which comprised beams, slabs and columns. In order to assure for viewing, the stadium was composed unusual structure that the height of the front column and the back column was designed differently. The bleachers was an upper arch form for viewing. The slab was not flat unliked the general infrastructure and tilted in stairway type for viewing. If we had applied the mechanical demolition method, we could have predicted several problems. Firstly, the stand could be unstable when the heavy equipment was to crush the reinforced concrete on the slab. Because the slab was not flat. Secondly, the construction expense and construction duration could be increase when the large equipment was to crush the reinforced concrete on the ground. Because the height of the stand was too high to crush on the ground so it needed to build a filling. Thus, we applied both the mechanical demolition method and explosives demolition method at the design stage. The result of explosives demolition was of complete success in terms of structural movement and controlled blasting noise and vibration. This case study provided a good example for a successful application of explosives demolition in urban areas.

A Case of Clonorchis Sinensis with Multiple Low Echogenic Nodules in a Child (소아에서 진단된 다발성 저음영 결절 형태를 보인 간흡충증 1례)

  • Hwang, Young Jun;Han, Man Yong;Ha, Doo Hoe
    • Pediatric Infection and Vaccine
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    • v.8 no.1
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    • pp.123-128
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    • 2001
  • Clonorchiasis, known as the parasitic fluke in the intrahepatic bile ducts, occurs throughout Korea, Japan, Taiwan, and Vietnam with high frequency. Most of the infections follow the consumptions of raw or undercooked freshwater fish, which explains its rare occurrence to childhood even in those areas mentioned earlier above. The authors have experienced it with an 8 year old boy. Abdominal ultrasonogram revealed multiple low echogenic nodules in the right lobe of liver and lymph nodes proliferation around the porta hepatis area. And abdominal C.T. scan also found multiple low attenuated nodules with delayed enhancement in liver parenchyma with hepatomegaly and multiple conglomerated lymph nodes in porta hepatis. Both abdominal ultrasonogram and C.T. scan didn't show any dilatation of peripheral intrahepatic bile ducts. In repeated stool examination, Clonorchis sinensis eggs were found in feces and the result of the skin test for Clonorchis sinensis was positive. The patient had a history of having eaten raw pond smelt back in Cheongju a month before the symptom onset. On the basis of the patient's history and the fact that Clonorchis eggs were found in feces 3 weeks after eosinophilia and symptoms were noted, the authors estimated that the findings of the patient's abdominal sonogram and C.T. scan were the radiologic findings of the acute phase of clonorchiasis, of which no report had ever been made before. So the authors report a case of clonorchiasis with atypical radiologic findings in an 8 year old boy.

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Improvement for the Degree of Client Satisfaction in the Sample Collection Room (검체채취실의 고객만족도 향상)

  • Park, Youn Bo;Kang, Hee Jung;Kwon, Hung Man;Ahn, Sang Jin;Yang, Suk Hwan;Tae, Yeun Ju;Chin, Young Hee;Jo, Hyon Koo;Lee, Bok Ja;Koo, Sun Hoe
    • Korean Journal of Clinical Laboratory Science
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    • v.36 no.2
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    • pp.222-232
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    • 2004
  • The sample collection room(SCR) will have much more influence than all the other departments for the improvement of hospital image, if anyone coming to the SCR in the hospital goes back with the perfect complacency and because most clients who have much stresses and fatigues pay a final visit to the SCR via receipt-diagnosis- acceptance process. SCR has improved its image for the purpose of gratifying clients, in order for clients to visit the hospital again, the quality improvement(QI) team in the Diagnosis Inspection Medical Department has come to a conclusion as follows. The degree of client gratification before improvement marks 65.9 point, but the degree after improvement was 74.2 point. Therefore, satisfaction has increased by 8.3 points. The degree of client gratification in groups before improvement marks (1) service parts-89.2 points (2) facilities and environments-49.1 point (3) toilet facilities-46.3 point. But its gratification after improvement marks (1) 92.5 point (2) 60.1 point (3) 61.0 point. Therefore the degree of satisfaction has increased by (1) 3.3 point, (2) 11.0 point, (3) 14.7 point. The progress of facility improvement plans and the exclusion of improvement on the facility contents in the hospital have made facilities and environments of SCR and toilet facilities to be poorly improved. Although service parts have a good mark, and the facilities and environments are not scoring well, the whole degree clients' gratification of SCR couldn't be helped by the low grade. Therefore the bottom line for the clients' gratification of SCR in the future is to ameliorate the facilities and environments. SCR will take the clients' gratification survey every year and if any items get low marks, that is, below 90 point throughout the survey, SCR will immediately starts the improvement work for the clients' gratification with operating the programs of controlling quality continually, and SCR should induce the operation of services, participating in the kind campaign drive for clients. So SCR will adopt the incentive system for the best staff members who perform these kinds of services.

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