• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.609-609
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• 2012

각종 하천 정비, 개발 등의 사업의 증가와 함께 홍수 등 자연재해의 취약지점으로 주목 받고 있는 하천 합류점에 대한 관심도 높아 가고 있다. 본 논문에서는 특히 자유 수면의 재현을 위하여 3차원 유한요소법 기반의 레블셋 기법을 이용하여 합류부의 수리 특성을 모의하였다. Navier-Stokes 방정식의 공간차분에는 Characteristic Galerkin 기법을, 시간차분에는 Fractional Four-step 기법을 적용하였다. 상류와 사류 상태 모두에 대하여 실험 결과에 근접하는 좋은 결과를 얻을 수 있었다.

• Proceedings of the Optical Society of Korea Conference
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• 2003.07a
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• pp.186-187
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• 2003

최근 들어 단일 양자점이나 단일 분자에 대한 분광 연구가 매우 관심을 끌고 있는데, 이는 미세구조 물질의 근본 물성을 밝히고자 하는 물리적인 관점뿐만 아니라 이를 실제적으로 이용하려는 실용적인 관점에서도 매우 중요한 주제이기 때문이다. 그러나 단일 양자점이나 단일 분자의 분광을 위해서는 공간적인 분해능이 우수할 뿐만 아니라 그 계에서 나오는 매우 미약한 광 신호를 검출하여야 하는 고도의 기술이 필요하다. (중략)

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.9
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• pp.1643-1653
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• 1992

A method, which uses analytical or numerical modal analysis results, e.g. from finite element analysis, to select desirable response measurement and excitation points for an efficient modal testing is introduced. First, points of master degree of freedom(DOP) are determined so as to statistically minimize errors between responses of a full order model and those estimated from the reduced order model. Such master DOF's are selected as the response measurement points. Then a criterion named 'driving point model constant(DPMC)' related to the magnitudes of resonance peaks of the driving point freqency response functions used to select the point of excitation out of the master DOF's. In this work, the method is demonstrated through applications to modal testing on a one dimensional cantilever beam and an aluminum plate and the results are compared with those by another technique. also, the method is applied to a two dimensional structural component of a passenger car.

• KIISE Transactions on Computing Practices
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• v.21 no.11
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• pp.706-712
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• 2015

These days, much information is provided as a list of summaries through mobile services. In this regard, users consume information in which they are interested by observing the list and not by expressing their interest explicitly or implicitly through rating content or clicking links. Therefore, to appropriately model a user's interest, it is necessary to detect latent interest content. In this study, we propose a method for reasoning latent interest of a user by analyzing mobile content consumption logs of the user. Specifically, since erroneous reasoning will drastically degrade service quality, a unanimity ensemble method is adopted to maximize precision. In this method, an item is determined as the subject of latent interest only when multiple classifiers considering various aspects of the log unanimously agree. Accurate reasoning of latent interest will contribute to enhancing the quality of personalized services such as interest-based recommendation systems.

• The Journal of the Korea Contents Association
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• v.15 no.2
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• pp.301-312
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• 2015

This study was conducted to provide baseline database to develop intervention program by investigating the relationship among body image, general appearance management behaviors and psychosocial health of female undergraduates'. From Sep. to Oct. 2014, total 198 participants were enrolled in this study. The data were analyzed using SPSS 21.0 program. The results were as follows: 1) The score of body image was $3.12{\pm}1.06$ in 5 points. Subjects had a lot of make-up and clothes behaviors, but exercise, food intake behaviors were lowerer than average. Also, psychosocial health score was $2.99{\pm}0.10$ point in 4 points. Whole 73.2% was latent risk group, and 25.8% was high risk group. 2) The relationship between the body image and general appearance management behaviors (p<0.001) and psychosocial health(p<0.001) revealed significant positive correlation. In general appearance management behaviors, there was a significant positive correlation between sub categories. And psychosocial health was positive correlation with body image and hair management behavior. 4) 14.4% of the psychosocial health was explained by 3 variables : body image, health interest and grade. Therefore, it would be utilized in developing programs for the positive body image building by interest own health, and being helped in the psychosocial health.

• The Journal of Korean Society for Radiation Therapy
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• v.21 no.1
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• pp.17-23
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• 2009

Purpose: In treating head and neck cancer, it is very important to irradiate uniform dose on the junction of the bilateral irradiation field of the upper head and neck and the anterior irradiation field of the lower neck. In order to improve dose distribution on the junction, this study attempted to correct non uniform dose resulting from under dose and over dose using the field-in-field technique in treating the anterior irradiation field of the lower neck and to apply the technique to the treatment of head and neck cancer through comparison with conventional treatment. Materials and Methods: In order to examine dose difference between the entry point and the exit point where beam diffusion happens in bilateral irradiation on the upper head and neck, we used an anthropomorphic phantom. Computer Tomography was applied to the anthropomorphic phantom, the dose of interest points was compared in radiation treatment planning, and it was corrected by calculating the dose ratio at the junction of the lower neck. Dose distribution on the junction of the irradiated field was determined by placing low-sensitivity film on the junction of the lower neck and measuring dose distribution on the conventional bilateral irradiation of the upper head and neck and on the anterior irradiation of the lower neck. In addition, using the field-in-field technique, which takes into account beam diffusion resulting from the bilateral irradiation of the upper head and neck, we measured difference in dose distribution on the junction in the anterior irradiation of the lower neck. In order to examine the dose at interest points on the junction, we compared and analyzed the change of dose at the interest points on the anthropomorphic phantom using a thermoluminescence dosimeter. Results: In case of dose sum with the bilateral irradiation of the upper head and neck when the field-in-field technique is applied to the junction of the lower neck in radiation treatment planning, The dose of under dose areas increased by 4.7~8.65%. The dose of over dose areas also decreased by 2.75~10.45%. Moreover, in the measurement using low-sensitivity film, the dose of under dose areas increased by 11.3%, and that of over dose areas decreased by 5.3%. In the measurement of interest point dose using a thermoluminescence dosimeter, the application of the field-in-field technique corrected under dose by minimum 7.5% and maximum 17.6%. Thus, with the technique, we could improve non.uniform dose distribution. Conclusion: By applying the field-in-field technique, which takes into account beam divergence in radiation treatment planning, we could reduce cold spots and hot spots through the correction of dose on the junction and, in particular, we could correct under dose at the entry point resulting from beam divergence. This study suggests that the clinical application of the field-in-field technique may reduce the risk of lymph node metastasis caused by under dose on the cervical lymph node.

• Korean Educational Research Journal
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• v.37 no.1
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• pp.19-32
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• 2016

The purpose of this article is to review the historical media and reenactment activity which is used in history education. Especially, teachers are very interested in how to develop the interest of the students in class. In this article, we review the characters of the reenactment activity as well as the drama and film. The definition of the reenactment activity is to act like a historical persons. 'Reenactment activity' is not familiar to us in Korea but it is very famous to the students and the teachers who want to re-act the historical life. Reenactment actvitiy is more efficient than movie because doing reenactment is much cheeper than making film.

• KOREAN POULTRY JOURNAL
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• v.36 no.5 s.415
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• pp.115-119
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• 2004

최근 야외에서 ND가 간간히 발생하고 있다는 소식이 들려오고 있다. 우리나라의 경우 ND 발생의 경우 독특한 양상을 띠고 있다. 첫째는 $2\~3$년의 주기로 발생이 되고 있으며 둘째는 $4\~6$월 사이에 발생이 집중 된다는 점이다. 고병원성 가금 인플루엔자(HPAI)를 겪은 우리에게 혹 긴장감이 느슨해지면서 농장의 차단 방역과 방역에 소홀해짐으로 올 봄 ND 대유행의 홍역을 치르는 것은 아닌지 다시 한번 경각심을 가져 보게 되면서 농장에서 관심을 갖고 있는 ND 분무 접종에 대해 이야기해보고자 한다. $5\~6$년 전까지만 해도 분무 백신에 대한 관심이 별로 없었던 게 사실이다. 그전 같았으면 음수 백신으로 백신 방법을 대치하고 말았을 것을 분무 백신을 해야 하는지? 또 어떻게 해야 하는지? 주의해야 할 점은 무엇인지? 등 여러 가지 질문을 받게 된다. 농장 부화장으로부터 분무기에 대한 관심도 부쩍 높아졌고, 이제는 대부분의 농가들이 분무 백신의 효능과 안전성에 대해 확신을 갖고서 꾸준히 실시하고 있는 것을 알 수가 있다. 대부분 많은 시행착오를 거쳐 나름대로의 기술력을 갖추게 되었고 많은 효과를 보고 있다고 말할 수가 있다. 그러나 아직 일부 농가들은 분무 백신 후 방어력과 후유증 즉, 안전성에 대해 많은 의심을 갖고 있으면서 시간과 노동력이 많이 소요되는 점안 백신을 하는 경우도 종종 보고있다. 이에 수년간의 경험을 통해 필자가 보는 견지에서 분무 백신을 하는데 있어 여러 가지 고려해야 할 사항, 주의 사항, 효과를 최대한 높이기 위한 방법 등을 알아보고자 한다.

• Radiation Oncology Journal
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• v.14 no.3
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• pp.247-253
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• 1996

Purpose : The dose calculation program for the Buckler type remote after-loading system was developed. This program also can be used to calculate dose for various sealed sources. Materials and Methods : We determined the source length and distribution by dividing the program disk to 72 points. The dose rate for the each program disk and source was calculated. The dose rate table for the xy coordinate was established. The dose rate for the interesting points of the patient were calculated by using this table, We also made isodose curve from this calculations. Results : The storage size for the dose rate table were increased. But the calculation of the dose rate for the patient were carried out rapidly. So we could get real time calculation. Conclusion : By using this program, we could calculate the dose rate for the various points of the patient quickly and accurately. This program will be useful for the treatment with various linear sources.

• Digital Contents
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• no.3 s.154
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• pp.84-85
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• 2006

새학기의 시작과 더불어 게임판도에도 많은 변화가 있었다. 우선 막대한 제작비가 투입된 대작RPG의 오픈베타서비스가 시작되었다. 기본적인 구도는 당초 대작3인방으로 불리던 웹젠의 <썬>이 예상보다 오픈베타서비스 일정이 늦추어지는 바람에 한빛소프트의 <그라나도에스파다>와 넥슨의 <제라>가 맞대결을 펼치고 있는 양상이다. 이 두게임은 이미 김학규 프리미엄으로 개발 초기부터 관심이 집중되었다는 점과 캐주얼게임의 지존 넥슨에서 최초로 개발한 정통성인 RPG라는 점에서 관심을 불러 일으키고 있다. 한편, 게임계뿐만 아니라 사회 전체 이슈로 떠오르고 있는 ‘리니지 도용 사태’는 시간이 지날수록 그 피해규모가 급증하며 엔씨소프트 및 게임·IT업체 들의 주가가 큰폭으로 하락, 후폭풍이 만만치 않았다. 그러나 명의도용의 원인이 되었던 <리니지> 게임은 사회적 파장과는 무관하리만큼 게임사용량의 큰 변화 없이 여전히 막강한 위세(?)를 떨치고 있다. 이번 명의도용 사태가 엔씨소프트에겐 악재로 작용했지만, 리니지 게임에는 전국적 홍보를 할 수 있었던 호재로 작용 했다. 개학과 더불어 전체 게임 사용량이 소폭 하락했던 2월! 그럼 지금부터 2월 한달간 게임동향을 살펴봤다.