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      • KCI등재

        주변 조건부 변수에 의한 연관성 규칙 생성에 관한 연구

        조광현,박희창,Cho, Kwang-Hyun,Park, Hee-Chang 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.1

        연관성규칙은 대용량 데이터베이스에서 각 항목들 간의 관련성을 찾아내는 기법이다. 현재 연관성규칙의 효율성을 개선하기 위하여 많은 연구자들에 의하여 제약 기반 연관성규칙의 연구가 활발하게 진행되고 있다. 연관성규칙 생성 시, 종종 많은 규칙들을 발견할 수 있다. 이들 규칙 중에서 변수들 간에 우연히 관련성이 높게 나타나는 경우가 존재할 수 있고 주변 조건부 변수 (매개변수, 외적변수)에 의하여 직접적인 관련성이 없는 규칙을 발견할 수도 있으며, 그 규칙은 간접적 해석만 가능하므로 의미가 없는 것으로 판단 할 수 있다. 이에 본 연구에서는 연관성 규칙에서 주변 조건부 변수를 고려한 연관성 규칙 생성에 관하여 연구하고자 하며, 이를 실례를 통하여 고찰하였다. 본 연구의 결과를 적용함으로써 연관성 규칙에서 의미 없는 규칙을 찾을 수 있으며, 변수들 간의 관련성을 보다 정확하고 명확하게 이해할 수 있을 것이다. Association rule mining searches for interesting relationships among items in a given database. Currently, study of the constraint-based association rules are underway by many researchers. When we create relation rule, we can often find a lot of rules. Of this rules, we can find rule that direct relativity by marginally conditional variables (intervening variable, external variable) does not exist. In such a case, this association rule can be considered insignificant. In this study, we want to study for association rules creation using marginally conditional variable. The result of this study can find meaningless association rules. Also, we can understand more exactly the relationships between variables.

      • KCI등재

        RFMP를 이용한 부동산 회원 분류에 관한 연구

        조광현,박희창,Cho, Kwang-Hyun,Park, Hee-Chang 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.3

        대부분의 기업들은 고객관계관리를 통하여 기존의 고객에 대한 충성도를 향상시켜 기업의 수익성을 극대화하기 위한 노력을 실시하고 있다. 고객관계관리란 고객에 대한 정보를 바탕으로 개인에게 적합한 맞춤형 서비스를 제공함으로서 고객과의 관계를 지속적으로 강화해 나가는 기법을 의미한다. 본 논문에서는 고객관계관리의 여러 가지 기법 중 고객을 세분화할 수 있는 RFM (recency, frequency, monetary) 방법을 적용하고자 하며, 기존의 RFM 모형에서 부동산 광고 구매 기간을 추가한 RFMP 모형을 이용하여 고객 세분화를 실시하고자 한다. 본 연구의 결과로 기존의 최근성, 최빈성, 총구매액 외에 광고 상품의 구매 기간을 고려하여 회원을 세분화함으로서 기존의 RFM 모형보다 더 나은 고객세분화를 이룰 수 있으며, 이를 바탕으로 회원에 대한 차별화된 마케팅 전략을 수립할 수 있을 것이다. Most companies make efforts to maximize their profitability by improving loyalty to existing customers through customer relationship management (CRM). According to the Wikipedia, CRM is a widely implemented strategy for managing a company's interactions with customers, clients and sales prospects. And RFM is a method used for analyzing customer behavior and defining market segments. It is commonly used in database marketing and direct marketing and has received particular attention in retail. In general, one considers recency, frequency, and monetary for customer segmentation in RFM method. In this paper, we apply RFMP method added to the purchase period of advertising items in the traditional RFM model for real estate customer segmentation. We will be able to establish the differentiated marketing strategy by RFMP method.

      • SCOPUSKCI등재

        피부에 발생한 혈관 중심성 T - 세포 림프종

        조광현 ( Kwang Hyun Cho ),양성규 ( Seong Gyu Yang ),김철우 ( Chul Woo Kim ),지두 ( Doo Hyun Chi ),고재경 ( Jai Kyoung Koh ),김영근 ( Young Keun Kim ) 대한피부과학회 1996 大韓皮膚科學會誌 Vol.34 No.6

        Background: Angiocentric T-cell lymphomas are rare T-cell malignancies which involve extranodal sites, such as the skin, nasal cavity, soft tissue and gastrointestinal tract. They have been reported with significant frequency in Asia. Objectives . The main objective of this study is to characterize t.he clinical, pathological, and immunohistochemical featnres of cutaneous angiocentric T-cell lymphoma. Another objective is to search for the Epstein-Barr virus (EBV) in the tissues of cutaneous angiocentiric T cell lymphoma. Methods : Clinical records, laboratory data, and histopathologic sections of 12 patients with cutaneous angiocentric T-cell lymphoma were reviewed. Paraffin tumor tissues were immunophenotyped. In situ hybridizaion studies were performed to detect the EBV genomes. Results : The ages of the 12 patients ranged from 34 to 64 years(mean 45.8 years). The cuta- neous lesions were nodules or plaqes, and were with ulcerated or had intact skin. Eight patients had evidence of extracutaneous involvement, usually involving lymph nodes, liver, and spleen. Eleven patients showed the abnormal laboratory findings including anemia, leukopenia, and elevated level of LDH. The dis ase pursued an aggressive course and was not uncommonly resistant to treatment. Hist,ologically, the lymphomatous infiltrate occurred predominantly in the subcutaneous layer with involvement f the dermis. The pattern was mainly perivascular and periadnexal. A prominent feature was invasion of small or medium vesselsby lymphoma cells. The infiltrating lymphrcytes expressed CD45RO in all cases ; variable expression of CD3 and CD56 was detected in piaffin sections. Among the 11 cases where in situ hybridization was performed, EBV genome could be detected in 9 cases. Conclusion . Angiocentvic T-cell lymphoma of the skin is an aggressive lymphoma distinct from classic cutaneous T-cell lymphoma. However, further studies are needed to regard them as a ho- mogeneous entity of T-cell lymphoma involving the skin. (Kor J Dermatol 1996;34(6): 953-960)

      • KCI등재

        염산 흡입 후 발생한 Reactive Airways Dysfunction Syndrome (RADS) 1례

        조광현,김승환,조영순,이한식,박준석,Cho, Kwang-Hyun,Kim, Seung-Hwan,Cho, Young-Soon,Lee, Hahn-Shick,Park, Joon-Seok 대한임상독성학회 2005 대한임상독성학회지 Vol.3 No.1

        A previously healthy 57-year-old woman with dyspnea and wheezing presented to the emergency department a few minutes after exposure to unknown gas from mixing bleach (sodium hypochlorite) and cleaning agent (hydrochloric acid) at work place. Initial physical examination revealed severe wheezing on both whole lung fields, but the chest radiograph was normal. Arterial blood gas analysis showed only moderate hypoxemia. The patient was treated with oxygen, $\beta$adrenergic bronchodilators, antihistamines and corticosteroids, after then symptoms were improved. And the patient discharged against medical advice. We report a rare case of reactive airways dysfuntion syndrome from chlorine gas exposure.

      • KCI등재

        키워드 네트워크 분석을 활용한 국내 설교학 분야 연구동향 연구

        조광현 ( Cho Kwang Hyun ),김현숙 ( Kim Hyunsook ) 한국복음주의신학회 2022 성경과신학 Vol.102 No.-

        이 연구는 국내 설교학 연구동향을 가늠하고자 설교학 분야에서는 지금까지 한 번도 시도되지 않았던 키워드 네트워크 분석을 시행하였는데, RISS(학술연구정보서비스)를 통해 가려낸 2000년 이후에 생산된 설교학 연구 논문 533편에서 1,613개의 저자 키워드를 추출해 NetMiner4 프로그램을 활용하여 분석하였다. 빈도분석 결과, ‘강해설교’, ‘신설교학,’ ‘설교자’, ‘수사학’, ‘설교신학’, ‘청중’, ‘예배’가 20회 이상 높은 빈도로 출현하였다. 연결중심성 분석에서는 ‘강해설교’, ‘신설교학’, ‘설교신학’, ‘수사학’, ‘설교자’, ‘내러티브 설교’, ‘적용’, ‘한국교회’ ‘청중’, ‘하나님의 말씀’, ‘개혁주의 설교’이 높은 순위를 보였다. 매개중심성이 높은 키워드는 ‘강해설교’, ‘설교자’, ‘수사학’, ‘청중’, ‘목회’, ‘신설교학’, ‘하나님의 말씀’, ‘설교신학’, ‘한국교회’, ‘내러티브 설교’였다. 응집성 분석 결과, 6개의 하위 주제가 네트워크를 형성하고 있었다. 하위 그룹은 G1: 설교의 전달, G2: 설교의 신학, G3: 설교의 맥락, G4: 강해설교와 신설교학, G5: 설교의 구성 요소, G6: 수사학으로 나타났다. This study examines the domestic research trends on homiletics by keyword network analysis that has not been attempted before in the field of homiletics. To achieve the objective, 1613 author keywords were extracted from 533 articles on homiletics published after the year 2000s from RISS(Research Information Sharing Service) and the keywords were analyzed using the NetMiner4 program. As a result of the frequency analysis, ‘Expository Preaching’, ‘The New Homiletic’, ‘Preacher’, ‘Rhetoric’, ‘Theology of Preaching’, ‘Listeners’, and ‘Worship’ all appeared more than 20 times, which is a high frequency of appearance. In the centrality analysis, ‘Expository Preaching’, ‘The New Homiletic’, ‘Rhetoric’, ‘Preacher’, ‘Narrative Preaching’, ‘Application’, ‘Korean Churches’, ‘Listeners’, ‘the Word of God’, and “Reformed Preaching” ranked high. ‘Expository Preaching’, ‘Preacher’, ‘Rhetoric’, ‘Listeners’, ‘Pastoral Ministry’, ‘the New Homiletic’, ‘the Word of God’, ‘Theology of Preaching’, ‘Korean churches’, and ‘Narrative Preaching’ show high values of betweenness centrality. The cohesion analysis shows that the network is classified into six sub-groups-G1: Delivery of Preaching, G2: Theology of Preaching, G3: Context of Preaching, G4: Expository Preaching and the New Homiletic, G5: Components of Preaching, G6: Rhetoric.

      • SCOPUSKCI등재
      • SCOPUSKCI등재

        경결홍반의 임상적 관찰 및 항결핵요법

        조광현 ( Kwang Hyun Cho ),이동윤 ( Dong Youn Lee ),김방준 ( Bang Soon Kim ),김정애 ( Jeong Aee Kim ) 대한피부과학회 1995 大韓皮膚科學會誌 Vol.33 No.4

        Background : Erythema induratum was first described by Bazin in association with tuberculosis. However, the tuberculous cause of this entity has been questioned by several authors and gradually, the concept of nontiiberculous nodular vasculitis has been accepted Objective P: The purpose of this study is to document the clinicopathologic features of erythema induratum. Methods : We investigated clinical and histopathological findings of 31 patient with erythema induratum who showed positive tuberculin hypersensitivity reaction or had active associated tuberculosis. Results : The ages of the 31 patients(M7: F24) ranged from 13 to 66 years(mean 37.1 years). All patients displayed recurrent crops of tender, painful, violaceous noudules or plaques. Most lesions were present on the legs, but they also occurred on the thighs, feet, buttocks, and forearms. The skin lesions evolved for several weeks and healed with scarring and residual pigmentation. Histological examination revealed lobular or septolobular panniculitis with varying cornbinations of granulomatous inflammaticn, primary vasculitis and necrosis in most biopsies. Twenty two patients were treated with isoniazid alone and the remaining 9 patients received combination anti tuberculous treatment. Relapses were encountered in 4 patients who received isoniazid alone or stopped the medicationrgainst medical advice. Conclusion : A diagncisis of erythema induratum should be rendered in the presence of relevant clinicopathologic features, strong positive Mantoux test reaction, and good therapeutic response to antituberculous treatme,it. A full course of combination antituberculous therapy is indicated to achieve a cure of the skin lesions of erythema induratum. (Kor J Dermatol 1995;33(4): 633-640)

      • SCOPUSKCI등재

        Bowen병 및 피부의 편평상피세포암에서 Human Papillomavirus DNA의 검색

        조광현(Kwang Hyun Cho),김영걸(Young Gull Kim),박경찬(Kyoung Chan Park),송용상(Yong Sang Song),최영민(Young Min Choi),김철우(Chul Woo Kim) 대한피부과학회 1994 大韓皮膚科學會誌 Vol.32 No.3

        Background : It has been suggested that human papillomavirua(HPV) infection has been implicated in the pathogenesis of between disease and squamous cell cacoma of the skin, particularly of snogenital area. There is little knowledge about etiologic characteriscs of the development of Bowens disease and squamous cell earcinoma of the skin in Korean patients. Objective : This study is intended to evaluate Bowens disease and squamous cell carcinoma of the skin in Korean patients for the presence of HPV. Methods : Fifteen cases of Bowens disease and fifteen cases of cutaneous squamous cell carcinoma were investigated. All cases developed on a nongenital site. In situ lybridization and polymerase chain reaction(PCR) were used for detection of HPV DNA in paraffinem bedded tissue sections. The clinical records and slides of these cases were reviewed for the analysis of clinicopathologic characteristiqs of HPV DNA positive eases. Results : By in situ hybidization HPV 16 was detected in thrw cases(20%) with Bowens disease. By PCR HPV 16 was detected in six cases(40% ) of Bowens digreae and five cases(33.3) of squamous cell carcinoma of the skin. No specific clinicopathologic fetetues were found to be indicative of the presence or absence of HPV. Conclusion : These data suggest a role for HPV in the evolution of Bowens disease and squamous cell carcinoms of the skin in Korean patients. (Kor J Dermatol 1904; 32(3): 398-408)

      • KCI등재

        한국재래산양 신생자축의 혈액학치 변화에 관한 연구

        조광현 ( Kwang-hyun Cho ),박용수 ( Yong-soo Park ),김성국 ( Seong-guk Kim ),어경연 ( Kyung-yeon Eo ),곽동미 ( Dongmi Kwak ),권오덕 ( Oh-deog Kwon ) 한국가축위생학회 2017 韓國家畜衛生學會誌 Vol.40 No.1

        The present study was undertaken to clarify the changes in hematological values of Korean indigenous goats according to age. Blood samples were collected from 16 goats (5 females and 11 males) from birth up to the age of 6 weeks and the levels of various hematological values were analyzed. The body weight was increased from 2.54 kg at birth to 6.41 kg at 6 weeks age. The erythrocytes (RBC) counts and hemoglobin (Hb) values of goats were decreased at 2 weeks after birth, and increased gradually from 4 weeks after birth. The hematocrit (Ht) values were decreased until 4 weeks after birth, and increased at 6 weeks after birth. The mean cell volume (MCV) and mean cell hemoglobin (MCH) were decreased until 6 weeks after birth. The mean cell hemoglobin concentration (MCHC) was increased slightly from 2 weeks after birth. The red cell distribution width (RDW) was increased significantly at 2 weeks after birth, and decreased from 4 weeks after birth. The platelet (PLT) counts were increased significantly from 2 weeks after birth. The mean platelet volume (MPV) was decreased at 2 weeks after birth, and increased gradually from 4 weeks after birth. The total white blood cell (WBC) counts and the mean absolute numbers of neutrophil, lymphocyte, monocyte and eosinophil were increased from 2 weeks after birth. In conclusion, the data obtained from this study may be valuable as a standard for interpreting results of hematological analyses in Korean indigenous goats.

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