기분장애 환자에서 마음챙김에 기초한 인지치료에 따른 우울 증상과 다섯 가지 마음챙김 요소와의 관계

김남우,김혜영,조성준,안용민,Kim, Namwoo,Kim, Hyeyoung,Cho, Sung Joon,Ahn, Yong Min 대한생물정신의학회 2017 생물정신의학 Vol.24 No.4

Objectives We aimed to examine whether mindfulness skills are mediating the improvements of depressive symptoms in patients with mood disorders who practiced Mindfulness-Based Cognitive Therapy (MBCT). Methods A total of 19 patients with mood disorder were included in this study. The participants were divided into two subgroups: a normal to mild depression group and a moderate depression group. The participants completed questionnaires to assess depressive symptoms, anxiety, quality of life, suicidal idea, and mindfulness skills which were measured by the Five Facets of Mindfulness Questionnaire (FFMQ) before and after MBCT course. Results The moderate depression group showed improvements through MBCT in depressive symptoms and suicidal idea, but not in anxiety and quality of life. The normal to mild depression group showed no significant change through MBCT. The improvement of depressive symptoms in the moderate depression group was predictable by improvements of the five facets of mindfulness, especially by 'observe' and 'non-react' components. Conclusions This study showed that currently depressive patients with moderate severity but not with normal to mild severity benefit from MBCT in reducing depressive symptoms and suicidal idea. The improvement of depressive symptoms was mediated by improved mindfulness skills through MBCT.

이더리움 기반의 크라우드소싱 프레임워크 구조

김남우(Namwoo Kim),주정한(Jeonghan Joo),이현수(Hyeonsu Lee),이춘화(Choonhwa Lee) 한국정보과학회 2018 한국정보과학회 학술발표논문집 Vol.2018 No.12

버킷 정렬을 이용한 향상된 R-tree 대량적재 기법

김남우(Namwoo Kim),이미영(Miyoung Lee) 한국정보과학회 2012 정보과학회논문지 : 데이타베이스 Vol.39 No.1

위치 기반의 모바일 서비스, GPS(Global Positioning System), RFID(Radio Frequency IDentification) 등의 사용이 폭발적으로 증가하여, 위치 및 공간 데이터가 기하급수적으로 늘어나고 있다. 대규모 공간 데이터를 빠르게 검색하기 위해 대표적으로 R-tree 기반의 인덱스 구조를 사용한다. 대량의 공간 데이터로부터 효율적으로 R-tree 인덱스를 생성하기 위한 방법으로 STR(Sort-Tile-Recursive) 기법이 널리 알려져 있다. STR 기법은 공간 데이터를 정렬하는 부분에서 대부분의 시간을 소모한다. 정렬 시간 단축을 위해 본 논문에서는 버킷 정렬 기법을 이용하여 공간 데이터를 정렬하고, R-tree기반의 인덱스를 생성하는 기법을 제안한다. 제안 기법은 STR 기법의 Sort-Tile 부분을 버킷 정렬로 변경하여 인덱스 생성 시간을 단축한다. 실험결과를 통해 제안 기법이 STR 기법보다 7배 향상되었고, 이를 그래픽 처리 장치에서 병렬화하여 19배 가량 향상되었음을 확인하였다. Due to the explosive growth in use of LBS-based mobile services, Global Positioning System (GPS) and Radio Frequency IDentification (RFID), the location and spatial data are growing exponentially. The index structure based on R-tree is typically used in order to retrieve a large spatial data quickly. The Sort-Tile-Recursive (STR) method that is an efficient way to create R-tree index from large amounts of spatial data is widely known. The most time consuming part of STR method is to sort spatial data. To reduce sorting time, this paper proposes a method for creating an R-tree index which uses a bucket sort method to sort spatial data. The proposed method replaces a Sort-Tile to a bucket sort to reduce indexing time. Experimental results show that the proposed method enhances the performance more than 7 times compared to STR method and it enhances the performance more than 19 times by using Graphic Processing Unit (GPU).

감쇠계수 산출을 위한 자유 횡동요 감쇠실험 연구

김남우(Namwoo Kim),김용직(Yong Jig Kim),하영록(Youngrok Ha) 대한조선학회 2015 大韓造船學會 論文集 Vol.52 No.6

규칙파 중 반잠수식 해양구조물 주위의 런업에 관한 실험 연구

김남우(Namwoo Kim),남보우(Bo Woo Nam),조윤상(Yoonsang Cho),성홍근(Hong Gun Sung),홍사영(Sa Young Hong) 한국해양공학회 2014 韓國海洋工學會誌 Vol.28 No.1

This paper presents the results of an experimental study of wave run-ups on a semi-submersible offshore structure. A series of model tests with a 1:80 scale ratio were carried out in the two-dimensional wave basin of MOERI/KIOST. The experimental model had two columns and one pontoon. The model was fixed and wave elevations were measured at five points per column. Two different draft (operational & survival) conditions and three wave heights were considered under regular wave conditions. First, the nonlinear characteristics of wave run-ups are discussed by using the time series data. Then, the wave heights are compared with numerical results based on the potential flow model. The comparison shows fairly good correlation between the experiments and computations. Finally, wave run-ups under the operational and survival conditions are suggested.

정신과 의사와 비정신과 의사의 항우울제 처방에 대한 연구 : 건강보험심사평가원 청구 데이터 중심으로

김민지,김남우,신다운,이상진,박형근,김혜영,양보람,안용민,Kim, Min Ji,Kim, Namwoo,Shin, Daun,Rhee, Sang Jin,Park, C. Hyung Keun,Kim, Hyeyoung,Yang, Boram,Ahn, Yong Min 대한생물정신의학회 2019 생물정신의학 Vol.26 No.2

Antidepressants are widely used to treat depression in Korea, however, only a few studies have focused on the provider of the treatment. The aim of the study is to compare the differences between patients who were prescribed antidepressants by psychiatrists and those who were prescribed antidepressants by non-psychiatrists in South Korea. Patients with a diagnosis of depressive disorder who had been newly prescribed antidepressants in 2012 were selected from the Health Insurance Review and Assessment Service database. They were classified into two groups depending on whether they received the antidepressant prescription from a psychiatrist or non-psychiatrist. Sociodemographic, clinical, and depression related cost has been investigated. Treatment resistant depression, which is defined as a failure of two antidepressant regimens to alleviate symptoms, was also investigated. Prescription adequacy was assessed based on whether a regimen was maintained for at least 4 weeks. Among the 834694 patients with pharmaceutically treated depression (PTD) examined in this study, 326122 (39.1%) were treated by psychiatrists. Patients who were treated by psychiatrists were younger and had more psychiatric comorbidities than those treated by non-psychiatrists. They had longer PTD duration (229.3 days vs. 103.0 days, p < 0.05) and a larger proportion of treatment resistant depression (9.3% of PTD) when compared to those patients treated by non-psychiatrists. The patients treated by psychiatrists had a smaller proportion of inadequate antidepressant use compared to those patients in the non-psychiatrist group (44.5% vs. 65.1%, p < 0.05). The costs related to depression corrected with PTD duration were higher in the non-psychiatrist group (32214 won vs. 56001 won, p < 0.05). Patients who receive antidepressants from psychiatrists are patients with more severe, treatment-resistant depression. Psychiatrists prescribe antidepressants more adequately and cost- effectively than non-psychiatrists.

이종 클라우드를 연동하는 클라우드 서비스 브로커

김진미(Jinmee Kim),강동재(Dong-Jae Kang),김남우(Namwoo Kim),이지현(Jihyun Lee),정성인(Sungin Jung) 한국정보과학회 2014 정보과학회지 Vol.32 No.2

Immediate Effects of Moving Myofascial Decompression Therapy for Young Adults with Nonspecific Neck Pain

민가윤(Kayoon Min),김남우(Namwoo Kim),이용우(Yongwoo Lee) 물리치료재활과학회 2021 Physical therapy rehabilitation science Vol.10 No.2

Objective: The purpose of this study was to investigate the effects of myofascial decompressiontherapy using moving suction on body temperature, pain, neck disability index, and cervical rotation for young adult with nonspecific neck pain. Design: Two-group pretest-posttest design. Methods: The subjects were randomly assigned 22 patients with chronic cervical pain who met the study conditions to theexperimental group (n=11) and the control group (n=11). In the experimental group, the myofascial decompressiontherapy (MDT) was performed for 10 minutes using moving suction withnegative 15 mmHg pressure from the insertion to the origin of the uppertrapezius muscle, while the control group without negative pressure. In order to investigate the effects of the intervention, an infrared thermometer, a visual analogue scale, neck disability index, and goniometer were used. Results: As a result of comparing the pre- and post- changes in each group according to the intervention, skin temperature, pain,neck disability index, and cervical rotation in both the experimental and control groups were significantly improved (p<0.05). Comparison of pre- and post- changes between the experimental and control groups showed significant differences for pain andcervical rotation (p<0.05), but no significant difference was found in the body temperature and neck disability index. Conclusions: Based on the results, MDT using moving suction was effective in reducing pain and increasing of cervical rotationfor young adult with nonspecific neck pain.

3차원 자동 연마장치의 개발

정윤교(YoonGyo Jung),김남우(NamWoo Kim),문병준(ByungJoon Moon),芝田勳(Isao Shibata) 한국생산제조학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.4

특집논단 : 렉서스 사건에서의 관련시장 획정을 위한 경제분석 방법론에 관한 연구

권도형 ( Dohyung Kwon ),김남우 ( Namwoo Kim ),오선아 ( Sunah Oh ),이상승 ( Sang Seung Yi ) 한국경쟁법학회 2015 競爭法硏究 Vol.32 No.-

Market power - the ability of a firm to raise price above the competitive level for a sustained period - is a part of the legal framework in antitrust contexts. Monopoly power (or market dominance) is an element of the offense of abuse of dominance under Article 3-2 of the Monopoly Regulation and Fair Trade Act (the “MRFTA”). In addition, market power is assessed under Article 19 of the MRFTA to determine whether conduct undertaken pursuant to an agreement has an adverse impact on the market. Market share is still often used as a good proxy for market power. The common method of proving market power in antitrust cases involves first defining a relevant market in which to compute the defendant’s market share, next calculating that share, and then deciding whether it is large enough to support an inference of the required degree of market power. In other words, to measure market power, it is the first step to define markets. Numerous empirical techniques, including SSNIP are employed to define markets. These techniques are usually purposed to identify the products and geographic regions that should be included in the relevant market by analyzing seller/buyer substitution based on sales and price data. It is also well recognized that it is very difficult in drawing clear boundaries and thus market definition has been often a thorny issue in competition law analysis. The issue of market definition was brought up in two recent court cases in Korea - alleged collusion by BMW and Lexus dealers. In both cases, a concerted action by the dealers carrying the same brand was under the judicial review. The enforcement agency, the Korea Fair Trade Commission (the “KFTC”) in its decision narrowly delineated the relevant market as single brand automobiles (i.e., BMW automobiles market and Lexus automobiles market in Korea, respectively) and the appellants in both cases countered by arguing that the relevant market includes at least other luxury brand automobiles-both foreign and domestic. These two cases have drawn many antitrust scholars and practitioners’ attention so as to become a leading case in connection with market definition. Many antitrust economists and attorneys wrestled with market definition issue for considerable time. This article provides a critical opinion particularly regarding the KFTC’s narrow approach to market definition through an in-depth analysis of BMW and Lexus cases, identifying methodological and analytical errors. Chapter 2 describes a summary of the court decisions in Lexus case and its procedural history. Chapter 3 conducts an economic analysis in Lexus and BMW cases from a critical perspective. Chapter 4 discusses the merits and demerits of two methods to delineate relevant markets-consumer survey and econometric method. Chapter 5 concludes that the economic methods and analysis used to define market should be very carefully assessed by the court to avoid false negatives.