로렌츠 커브를 이용한 하둡 플랫폼의 최적화 지수

김우철,백창룡,Kim, Woo-Cheol,Baek, Changryong 한국통계학회 2014 응용통계연구 Vol.27 No.2

Ever increasing "Big data" can only be effectively processed by parallel computing. Parallel computing refers to a high performance computational method that achieves effectiveness by dividing a big query into smaller subtasks and aggregating results from subtasks to provide an output. However, it is well-known that parallel computing does not achieve scalability which means that performance is improved linearly by adding more computers because it requires a very careful assignment of tasks to each node and collecting results in a timely manner. Hadoop is one of the most successful platforms to attain scalability. In this paper, we propose a measurement for Hadoop optimization by utilizing a Lorenz curve which is a proxy for the inequality of hardware resources. Our proposed index takes into account the intrinsic overhead of Hadoop systems such as CPU, disk I/O and network. Therefore, it also indicates that a given Hadoop can be improved explicitly and in what capacity. Our proposed method is illustrated with experimental data and substantiated by Monte Carlo simulations.

협부에 전이된 지방육종의 치험례

김우철,홍락원,김태훈,문선혜,박노부,이용오,Kim, Woo-Cheol,Hong, Lak-Won,Kim, Tae-Hoon,Moon, Seon-Hye,Park, No-Boo,Lee, Yong-Oh 대한악안면성형재건외과학회 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.3

Liposarcoma is one of the most common malignant mesenchymal neoplasm, comprising approximately 15% of all soft tissue sarcoma. This is a tumor with an incidence peak between age 40 and 60 years, and is slightly more common in men than women. Although all body region may be involved, the most frequent sites are lower extremities and retroperitoneum but rare in the head and neck region. Liposarcoma can be classified to four subtypes ; myxoid, well-differentiated, round-cell, pleomorphic. The myxoid type is the most common and accounts for almost one half of all liposarcoma. Wide surgical excision with or without radiation therapy has been used to manage this lesion. We report a case of 50-year old man with soft tissue swelling on the left cheek, previously diagnosed as myxoid liposarcoma in the left lower extremity. After radiologic and ultrasonic study and surgical excision with biopsy, the lesion of cheek was diagnosed as myxoid liposarcoma with round cell differentiation.

정렬된 잔기 사이의 최대거리와 유사도 그래프에 기반한 단백질 구조 정렬

김우철(Woo-Cheol Kim),박상현(Sang-Hyun Park),원정임(Jung-Im Won) 한국정보과학회 2007 정보과학회논문지 : 데이타베이스 Vol.34 No.5

최근 인간 게놈 프로젝트를 통해서 인간의 DNA가 해석된 이후 유전자가 생성하는 단백질의 기능에 대한 관심이 높아지고 있다. 단백질의 기능은 서열의 유사도보다는 진화과정 상에서 잘 보존되는 구조의 유사도에 더 연관되어 있다. 이를 통해 두 개의 단백질 간에 구조 유사성이 관찰되면 이로부터 이들이 유사한 생물학적 기능을 가질 것을 기대할 수 있다. 따라서 유사한 단백질 구조를 가진 단백질을 찾기 위한 방법으로 단백질 구조 정렬에 대한 많은 연구들이 진행되었다. 하지만 기존의 연구들은 유사도로 주로 RMSD(Root Mean Square Deviation)를 사용했기 때문에 두 단백질의 정렬 결과가 유사한지 혹은 유사하지 않은지를 직관적으로 판단하기 쉽지 않다. 또한 대부분의 기존 연구들은 정렬 결과로 최적의 정렬 결과 하나만을 찾기 때문에 서로 다른 목적을 가지는 사용자들을 만족시키기 어렵다. 따라서 본 논문에서는 새로운 유사도인 MRPD(Maximum of Residue Pair Distance)와 다수의 정렬 결과를 하나의 그래프로 표현하는 SG(Similarity Graph)을 기반으로 여러 가지 정렬 결과를 한 번에 생성하는 단백질 구조 정렬 방식을 제안한다. 단백질 정렬에 MRPD를 유사도로 사용하면 RMSD를 사용하는 경우에 비해서 유사 정도를 직관적으로 이해할 수 있을 뿐 아니라 신속하게 결과를 얻을 수 있다. SG는 사용자가 다양한 후보 정렬 결과들 중에서 자신이 원하는 정렬 결과를 신속히 검색할 수 있도록 지원한다. 따라서 본 논문에서 제안한 단백질 구조 정렬 알고리즘은 다양한 길이에 따른 다수의 최적 정렬들을 제시하여 사용자의 만족도를 향상시킬 수 있었으며, 다수의 정렬 결과 검색임에도 불구하고 정렬 시간은 기존 방법들과 거의 비슷하다는 장점이 있다. After the Human Genome Project finished the sequencing of a human DNA sequence, the concerns on protein functions are increasing. Since the structures of proteins are conserved in divergent evolution, their functions are determined by their structures rather than by their amino acid sequences. Therefore, if similarities between two protein structures are observed, we could expect them to have common biological functions. So far, a lot of researches on protein structure alignment have been performed. However, most of them use RMSD(Root Mean Square Deviation) as a similarity measure with which it is hard to judge the similarity level of two protein structures intuitively. In addition, they retrieve only one result having the highest alignment score with which it is hard to satisfy various users of different purpose. To overcome these limitations, we propose a novel protein structure alignment algorithm based on MRPD(Maximum of Residue Pair Distance) and SG (Similarity Graph). MRPD is more intuitive similarity measure by which fast filtering of unpromising pairs of protein pairs is possible, and SG is a compact representation method for multiple alignment results with which users can choose the most plausible one among various users’ needs by providing multiple alignment results without compromising the time to align protein structures.

태극권 운동이 노인의 건강관련 체력수준과 정신건강에 미치는 영향

김우철(Kim, Woo-Cheol),최석립(Choi, Suk-Lip),김성운(Kim, Sung-Woon) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.4

The purpose of this study was to identify the effect of tai chi exercise on skill related fitness and mental health in elderly adult. Twenty-four elderly adult were participated in this study. Their ages ranged from 65 to 69, with a mean age of 67.5 years. Subjects were divide into two group. Data was analyzed using two-way ANOVAs with repeated measures of group(tai chi excise group and control group) and time(before and after). Dependent variables were cardio-respiratory endurance, muscle endurance, flexibility, balance, tension, depression, anger, fatigue, confusion and TMD(total mood disturbance). The result of this study indicated that tai chi exercise group had a significantly higher score than control group in cardio-respiratory endurance, muscle endurance, flexibility, balance. The result of the analysis indicated that sub-factors of skill related fitness were improved. And the tai chi exercise group had a significantly lower score than control group in tension, depression, anger, fatigue and TMD. but higher score in vigor, relative to control group. It was found that tai chi exercise helped to improve physical fitness and enhance mental health.

조선후기 束伍役의 徭役化 과정 : 束伍軍 操鍊制度의 변화와 관련하여

김우철(Kim Woo-Cheol) 고려사학회 1998 한국사학보 Vol.- No.3-4

Social Background of a Visionary Rebellion and the Image of an Ideal Society

Kim Woo-cheol(김우철) 고려대학교 한국사연구소 2010 International Journal of Korean History Vol.15 No.1

인조 7년(1629) 이충경의 반역 사건은 정묘호란을 계기로 발생한 유민들을 끌어들여 반역을 꾀하다가 적발되어 실패한 사건이었다. 참여 계층이 주로 하층민에 집중되어 있었고 규모도 수십 명에 불과하였으며 실제로 행동에 옮기기 전에 모두 체포되었으므로 크게 주목되지 못했으며, 따라서 ‘실없는 농담’이나 ‘아이들의 장난’이라고 평가되기도 했다. 그러나 이들이 집단을 이루어 저항에 이르게 된 사회적 배경이나, 이들이 추구하고자 했던 이상 사회에 대한 염원은, 그 성공 여부와 별도로 음미할 가치가 있는 것으로 판단된다. 이 사건은 정묘호란이 발발한 지 2년 뒤에 호란으로 큰 피해를 입었던 평안도ㆍ황해도 지역을 중심으로 발생하였다. 전쟁으로 가족을 잃고 떠돌던 유민들은 생계를 유지하기 위한 방편으로 집단에 가담하지만, 한편으로는 후금에 대한 적대 의식도 가담의 배경으로 작용했다. 최영이나 남이와 같이 조선왕조를 부정하는 상징적 인물이 강조되면서 이 집단은 단순한 생계형 도적 집단이 아닌 반역 집단으로 전화하지만, 가담자들은 동요하지 않고 행동을 함께 하였다. 이 사건의 주모자인 이충경은 「개국대전」이라는 문서를 통해, 자신이 추구하는 이상사회의 모습을 소박한 형태로 구현하였다. 그 사회는 군역이나 조세 부담을 누구나 고르게 지며 특권을 부인하는 평등한 사회였다. 또 국가기구의 민인에 대한 붑법적 침해나 착취를 금지하는 정의로운 사회였다. 조선왕조가 지니고 있었던 모순을 진솔하게 표현한 이러한 바람은 ‘실없는 농담’이나 ‘아이들의 장난’이라고 평가되며 무시되었고, 따라서 모순은 해결되지 않았으며, 결국 또 다른 새로운 저항으로 전화될 수 있는 소지를 남겨 놓았다. Yi Ch’unggy?ng’s Rebellion of 1629 (7<SUP>th</SUP> year of King Injo), was an incident that saw people displaced by the First Manchu Invasion of 1627 (Ch?ngmyo horan) attempt to overthrow the existing government. The majority of the participants in this attempted uprising were from the lower classes. As the group involved only a score of people, and they were all arrested before their plot could be actualized, it did not garner any attention at the national level. It was even evaluated as a ‘silly game involving some overgrown children.’ However, leaving aside the success or failure of the incident, much can be gained from delving into the participants’ social background, how they got to the point where they raised a resistance, and their wishes for an ideal society. This incident was hatched in the provinces of P’y?ngan and Hwanghae, both of which had suffered greatly as a result of the First Manchu Invasion of 1627. Most of those who followed Yi had lost their families and found themselves displaced by the war. These individuals perceived the proposed coup as a means to secure a livelihood. On the other hand, they also harbored a strong sense of hostility toward Later Chin. The growing emphasis on the worship of Ch’oe Y?ng and Nam Yi, two generals who had opposed the Chos?n dynasty, signified that Yi’s group had been transformed from a band of thieves into one that plotted rebellion. However, despite this change in character, every member of the group’s support for Yi remained unwavering. The group’s ringleader Yi Ch’unggy?ng gave form to the ideal society that he envisioned in a document called the 〈Kaeguk taej?n〉. The ideal society was one in which public equality was to be achieved by reigning in abuses in the military service and tax structures and removing privileges. It was a society in which the state’s illegal exploitation of the people was to be brought to a halt. Their pure wishes for an end to the conflicts that pervaded Chos?n dynasty were ignored by the powers that be, and their uprising was evaluated as a ‘useless farce initiated by a few woodsmen’ or as a ‘silly game involving some overgrown children.’ As such, the inherent conflicts at the center of this incident were not resolved and a tinderbox that could be lit at another time was left behind to fester.

도시범죄의 선제적 대응을 위한 ABM을 활용한 범죄 예측 연구

김우철(Kim, Woo-Cheol),정성원(Jung, Sung-Won) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.1

조선후기 輿地圖書에 나타난 인천 지역의 姓氏와 人物

김우철(Kim, Woo-Cheol) 인천대학교 인천학연구원 2007 인천학연구 Vol.6 No.-

Through the investigation of the item of 'family names', it was found that understanding the kinds of family name became simple, and the number of the origin of family names got decreased as getting closer to the late Joseon. It is understood that the origin of family names was separated from the real place of residence. In case of Gyodong, Incheon, Bupyeong, the targets of recording was only family names that came from their towns. Meanwhile, case of Ganghwa included all the people who were living in their towns. This empathized the necessity of more precise examine than the process of compiling local geography. Probably, it shows us Gangdobuji, which is the geography of Ganghwa province, to have its own character as information. Meanwhile, through the case of Yeongjong, we could research the origin of family names of which people were living in that town in the late Joseon. Through the investigation of the item of individuals, there was a speciality of the district that produced many people related in integrity during the Manchu Invasions in Korea in 1636. Moreover, we could infer the position of the staff, who wanted to use the Manchu Invasions in Korea in 1636 as the chance of education, for compilation, that fact could not only apply for Ganghwa, but also for others. Then, we could understand the information, Yeojidoseo, with the recognition of 'family names' and 'individuals' in Incheon province. Also we could find that Yeojidoseo was not consisted by a sole regularity and made in lack of variety. We also found that the limited place of Incheon had differences in standards by each localities, as there were the case which recorded separately the origin of the family names from the real place of residence, or there were the case which recorded in resident-centered and these cases showed up everywhere with no rules. Through the many differences from each province, we could grasp the clue for the process of compiling Yeojidoseo, especially, Gangdobuji could be valuable information for understanding the facts. Its rich contents will help many people understand and study local history in the future.

仁祖 24년(1646) 安益信 謀反 사건과 그 의미

김우철(Kim Woo-cheol) 고려사학회 2008 한국사학보 Vol.- No.33

안익신의 모반 사건은 모반 사건이 끊이지 않고 일어났던 인조대 후반 인조 24년(1646)에 발생하였다. 정통성을 문제 삼는 잦은 모반 사건과 함께, 소현세자의 사망과 강빈의 옥사가 이어졌으며, 또한 전국에서 토적들이 빈발하던 상황이었다. 면천 신분인 안익신이 주도하고 서울과 지방의 하층 양반들이 결탁하여 준비된 거사는 고변으로 실패했지만, 지역적으로 충청도와 전라도 일원에 걸쳐 모의되었고 조정에서는 이를 대비하기 위해 전국적으로 경계를 펴는 등 부산하게 움직였다. 안익신 모반사건은 인조대 내내 이어져왔던 모반 사건의 흐름을 계승하는 연장선상에서 발생한 사건이라는 측면과 함께, 동시에 민중의 저항이라는 새로운 흐름이 결합되어 나타나고 있었다는 점에서 주목된다. 이러한 서로 다른 흐름의 결합은 배경의 측면에서는 중앙 정치의 난맥에 대한 불만과 함께 지방 백성들의 현실적인 부담에 대한 불만이 결합되는 형태로 나타났고, 인적인 측면에서는 서울 출신과 지방 출신의 결합이라는 형태로 나타났다. 또한 이는 당시의 사회적 배경과 밀접한 연관을 맺고 진행되었다. 인조의 정통성을 문제 삼으며 계속되었던 모반의 흐름을 계승하는 한편으로, 주모자들은 민중들의 신망이 높은 임경업의 이름을 끌어들이거나, 최영의 후예를 거론하기도 했으며, 정감록과 짙은 비결을 배경으로 진인이 나타났다 둘러대기도 하였다. 이와 함께 민중들에게 고통을 안겨주던 속오군의 겸역은 가담을 촉진하는 직집적인 원인으로 작용하기도 하였다. 한편 조정은 이 사건을 수습하는 과정에서 정국을 장악하려 했다. 이러한 움직임은 사건의 실제 규모와는 무관하게 사건에 과잉 대응하는 형태로 나타나기도 했고, 이 사건을 계기로 정국 운영에 대한 부담이 되는 정적들을 제거하는 형태로 나타나기도 했다. 또한 왕권 강화의 측면과는 별도로, 안익신 사건은 국가 체제, 특히 방어 체제를 정비하는 계기로도 작용하였다. 이는 토포사의 권한 강화, 각지 성지의 수축과 함께 효종대에 전임영장제를 복설하며 지방군을 강화하는 형태로 나타났다.

柳赫然의 大興山城 경영과 庚申換局

김우철(Kim, Woo-cheol) 한국인물사연구회 2013 한국인물사연구 Vol.20 No.-

At the proposal of Heo Jeok, a task of organizing a military unit with drifting people began during the reign of King Hyeonjong to gather drifting people and secure military service resources. Joining in the task, Ryu Hyeok-yeon established dozens of garrison farms along mountain valleys and recruited young men of conscription age. He even set up one run by Hunryeondogam in Icheon, Gangwon Province. There were changes to the political situations of China during the reign of King Sukjong, and they caused a group of figures under the leadership of Yun Hyu to raise the northern expedition plan. He and Ryu Hyeok-yeon argued over whether to use a chariot and build Daeheung Mountain Fortress. Eventually, they agreed not to use chariots and instead build Daeheung Mountain Fortress in Mt. Cheonma, Gaeseong. The mountain fortress was built and run based on the collaboration of Ryu Hyeok-yeon and Heo Jeok. While Ryu was in charge of building and managing the mountain fortress, Heo set up financial management plans and installed a system related to the troops allocated to the mountain fortress. Ryu"s management of Daeheung Mountain Fortress was the combined result of the policy of gathering drifting people that began during the reign of King Hyeonjong and the fortress construction argument raised in the process of the northern expedition plan. However, it ended up giving an excuse to make him a victim in the process of Gyeongshinhwanguk, which began with dismissing him from the position of training commander according to the prior intervention of Kim Seok-ju. In the end, Ryu was killed by the poison bestowed by the king in the jail of Heo Gyeon. Ryu was initially suspected of communicating with Lee Nam and Heo Gyeon secretly and deeply, but Chugukcheong could not prove that he was guilty. Ryu was ultimately killed by the poison bestowed by the king for "marriage to a close member of the royal family" and "organization of the garrison." Those charges, however, were not proven to have something to do with the plot of treason or difficult to prove guilty since they happened in his normal job performance process. King Sukjong was fully aware of it, too. Ryu was finally restored to his public position and "officially" cleared of his charges during the reign of King Sukjong.