2002년 기부횟수 자료의 재분석: 수정 및 보완

김병수,이주형,김인영,박수범,박태규,Kim, Byung Soo,Lee, Juhyung,Kim, Inyoung,Park, Su-Bum,Park, Tae-Kyu 한국통계학회 2014 응용통계연구 Vol.27 No.5

Kim 등 (2006)과 Kim 등 (2009)은 2002년에 (사)볼런티어 21에서 조사한 설문자료에 기초하여 우리나라 개인의 기부횟수에 영향을 주는 유의적 설명변수를 보고한 바 있다. 본고에서는 Kim 등 (2006)과 Kim 등 (2009)의 계산오류를 발견하여 이를 수정하고, 아울러 Kim 등 (2009)이 적용한 0이 팽창된 포아송 모형에 로지스틱 회귀모형을 추가하였다. 동 로지스틱 모형으로 기부행위(0, 1)에 영향을 주는 설명변수를 식별하고, 아울러 기부횟수가 작은 군(群)과 큰 군(群)을 판별하여 주는 설명변수를 식별하고자 한다. Kim et al. (2006) and Kim et al. (2009) reported a set of explanatory variables affecting donation frequency when they analyzed nationwide survey data on donations collected in 2002 by Volunteer 21, a nonprofit organization in Korea. The primary purpose of this paper is to correct computational errors found in Kim et al. (2006) and Kim et al. (2009), to rectify major results in the Tables and Figures and to supplement Kim et al. (2009) by providing new results. We add two logistic regressions to the ZIP and a mixture of two Poisson regressions of Kim et al. (2009). Through these two logistic regressions we could detect a set of explanatory variables affecting donation activity (0 or 1) and another set of explanatory variables, in which the volunteer (0, 1) variable is common, discriminating the infrequent donor group from the frequent donor group.

Trapezoid mesa와 Half Sidewall Technique을 이용한 4H-SiC Trench MOS Barrier Schottky(TMBS) Rectifier

김병수,김광수,Kim, Byung-Soo,Kim, Kwang-Soo 한국전기전자학회 2013 전기전자학회논문지 Vol.17 No.4

본 논문에서는 전력반도체 소자의 재료로써 주목받고 있는 탄화규소 기반의 Trench MOS Barrier Schottky(TMBS)의 순방향 및 역방향 특성을 개선시키기 위한 구조를 제안한다. 순방향 전압강하와 역방향 항복전압을 개선시키기 위하여 사다리꼴 mesa 구조와 trench sidewall의 길이를 조절하는 기법을 사용하는 4H-SiC TMBS 정류기를 제안하고 있다. 제안된 구조는 사다리꼴 mesa 구조를 적용하여 trench sidewall에 경사를 줌으로써 1508V의 역방향 항복전압을 얻었다. 이것은 기존의 4H-SiC TMBS 정류기에 비하여 역방향 항복전압을 11% 개선시켰음을 나타낸다. 또한 trench sidewall 상단의 길이를 조절하여 순방향 전류 $200A/cm^2$에 대하여 12% 감소된 1.6V의 순방향 전압강하를 얻었다. 제안된 소자는 Silvaco사의 T-CAD를 사용하여 전기적 특성을 분석하였다. In this study, an 4H-SiC Trench MOS Barrier Schottky (TMBS) rectifier which utilizes the trapezoid mesa structure and the upper half of the trench sidewall is proposed to improve the forward voltage drop and reverse blocking voltage concurrently. The proposed 4H-SiC TMBS rectifier reduces the forward voltage drop by 12% compared to the conventional 4H-SiC TMBS rectifier with the tilted sidewall and improves the reverse blocking voltage by 11% with adjusting the length of the upper sidewall. The Silvaco T-CAD was used to analyze the electrical characteristics.

Valuing Derivatives on the Stock Index Volatility in a General Equilibrium Framework

김병수,김인준,김동석 ( Byung Soo Kim,In Joon Kim,Tong Suk Kim ) 한국재무학회 1998 98년 춘계 학술발표 논문집 Vol.- No.-

화학치료를 받는 암 환자 '삶의 질'의 변화에 관한 연구

김병수,최인근,박경화,윤소영,오상철,서재홍,최철원,신상원,김열홍,김준석,Kim, Byung-Soo,Choi, In-Keun,Park, Kyeung-Hwa,Yoon, So-Young,Oh, Sang-Chul,Seo, Jae-Hong,Choi, Chul-Won,Shin, Sang-Won,Kim, Yeul-Hong,Kim, Jun-Suk 한국호스피스완화의료학회 2001 한국호스피스.완화의료학회지 Vol.4 No.2

Purpose : It is very important to endow the cancer patients underwent chemotherapy with satisfactory quality of life (QOL). However, little is known about the factors influencing QOL during chemotherapy. Therefore, we designed this study to find out the factors influencing QOL in the cancer patients who underwent chemotherapy. Methods : Ninety-seven cancer patients were studied, prospectively. The patients' characteristics were as follows; median age(range): 48(19{\sim}83) years, male:female; 57:40, PS:0,1/2,3;55/42 patients, diagnosis(number): lymphoma (28), lung cancer (22), gastrointestinal cancer (18), sarcoma (12), breast cancer (12), gynecological cancer (5), Stage: I,II/III.IV;37/60 patients. We used EORTC QLQ-C30 questionnaires to evaluate QOL. EORTC QLQ-C30 scores were performed before the onset of chemotherapy and after the end of 3 cycles of chemotherapy. The correlation of these scores with performance status (PS), diagnosis, disease stage, response to chemotherapy, and regimen related toxicity was evaluated. Results : The responder group (CR, PR) demonstrated marked improvement of social functional and emotional scales to non-responder group (SD,PD) (P=0.024, 0.045). Non-hematologic regimen related toxicity such as mucositis, nausea and vomiting was significantly correlated with pain scale change (P=0.043). Other factors had no notable correlation with QOL changes. Conclusion : Our preliminary study results may suggest as follows. The response to chemotherapy is associated with the change of social functional and emotional scales and the severity of non-hematologic regimen related toxicity is associated with pain scale change.

Ca 첨가가 PTCR 써미스터의 전기적 특성에 미치는 영향

김병수,김종택,김철수,김용혁,이덕출,Kim, Byung-Su,Kim, Jong-Taek,Kim, Chul-Soo,Kim, Yong-Huck,Lee, Duck-Chool 한국전기전자재료학회 1998 전기전자재료학회논문지 Vol.11 No.2

In this paper, to develop PTCR(Positive Temperature Coefficient of Resistance) thermistor with high withstanding voltage, Ca were added to. the compositions of $(Ba_{0.9165-X}-Sr_{0.08}-Ca_X-Y_{0.0035})TiO_3+MnO_2$ 0.02wt%+$SiO_2$ 0.5wt%. the effects of Ca additions were researched according the increasing of Ca from 0[mol%] to 20[mol%], and the electrical properties were investigated. As increasing Ca additions from 0[mol%] to 20[mol%], the grain size of the specimens was reduced from 11.1[${\mu}m$] to 6.15[${\mu}m$], and also the sintered density was reduced from 5.43[$g/cm^3$] to 5.05[$g/cm^3$] and their the breakdown voltages were increased from 163[V/mm] to 232[V/mm]. It is shown that the breakdown voltage was increased with amount of Ca additions.

도시광석(都市鑛石) 재자원화(再資源化)를 위한 건식공정(乾式工程)의 현황(現況)

김병수,이재천,신도연,정진기,이강인,손정수,양동효,김민석,김수경,Kim, Byung-Su,Lee, Jae-Chun,Shin, Do-Yeoun,Jeoung, Jin-Ki,Rhee, Kang-In,Sohn, Jeong-Soo,Yang, Dong-Hyo,Kim, Min-Seuk,Kim, Soo-Kyung 한국자원리싸이클링학회 2012 資源 리싸이클링 Vol.21 No.2

유한자원의 순환활용과 환경보전 관점에서 도시광석으로부터 산업원료로 재사용될 수 있는 금, 은, 팔라듐 및 구리, 주석, 니켈, 코발트, 리튬 등 유용금속의 회수는 매우 중요하다. 현재까지 도시광석으로부터 유용금속을 회수하기 위한 많은 공정이 개발되었으며, 그 중 일부는 상업적으로 가동되고 있다. 본 논문에서는 문헌을 통하여 조사된 도시광석으로부터 산업원료로 사용되는 유용금속을 재생하기 위하여 개발된 중요한 건식공정들을 간략히 소개하고자 한다. In the points of the environmental conservation and the recirculating utilization of limited resources, it is very important to recover valuable metals like Au, Ag, Pd, Cu, Sn, Ni, Co, and Li used as industrial raw materials from urban ores. From now, many processes have been developed for recovering the valuable metals contained in urban ores and some of them have been operated commercially. In the paper, pyrometallurgical processes developed for reclaiming valuable metals from urban ores will be briefly introduced.

악성 빈혈환자에서 발병한 위암 1예 보고

김병수,김종원,이인규,김동출,김우호,이혁준,양한광,Kim, Byung-Soo,Kim, Jong-Won,Lee, In-Kyu,Kim, Dong-Chul,Kim, Woo Ho,Lee, Hyuk-Joon,Yang, Han-Kwang 대한위암학회 2007 대한위암학회지 Vol.7 No.1

악성빈혈을 동반한 자가면역성 만성 위축성 위염은 위암의 전구 병변으로 알려져 있다. 저자들은 악성빈혈에 동반된 위암 1예를 경험하였기에 보고한다. 40세 여자환자가 어지럼증과 공복 시 속쓰림으로 시행한 혈액검사상 혈색소 4.2 g/dl으로 측정되었다. 상부위장관 내시경상에서는 위 고위 체부의 편평 융기성 병변이 관찰되었고 조직검사상 위선암으로 보고되었다. 위전절제술을 시행하였고 병리조직 검사상 병변은 고위 체부 전벽에 점막하층(SM2)까지 침범한 조기위암이었으며, 검사된 림프절 44개 중에 전이된 림프절은 없었다. 악성빈혈 환자에서 위축성 위염이 동반된 경우 위암의 호발연령이 되면 위암의 발생 가능성이 있으므로 상부위장관 내시경의 주기적인 시행이 중요하리라 생각된다. Increased risk of gastric cancer has been reported in patients with chronic atrophic gastritis that develops in conjunction with pernicious anemia. We report here a case of a gastric adenocarcinoma associated with pernicious anemia. A 40-year-old female patient had been diagnosed with anemia 6 years earlier at a local hospital. One month ago, she visited our hospital for aggravated dizziness and newly developed epigastric soreness. Her blood hemoglobin level was 4.2 g/dl, and a gastroscopic work-up for anemia discovered a 2.5-cm-sized, slightly elevated mucosal lesion at the anterior wall of the high body in the stomach. The biopsy of this lesion revealed a moderately-differentiated adenocarcinoma. She underwent a total gastrectomy with a Roux en Y esophagojejunostomy with D2 lymph node dissection. The final stage of the gastric carcinoma was identified as T1N0M0. Based on this experience, we recommend that a follow-up gastroscopy be performed in patients with pernicious anemia with atrophic gastritis because of the increased risk of gastric cancer in patients with pernicious anemia.

M&S를 활용한 유도탄 검사주기 및 수량 설정 방안

김병수,이계신,김동석,문기성,Kim, Byung-Soo,Lee, Kye-Shin,Kim, Dong-Seok,Moon, Ki-Sung 한국시뮬레이션학회 2009 한국시뮬레이션학회 논문지 Vol.18 No.4

In this study, we presented the periodic inspection method of the Certified Missile Round Concepts usuing M&S(Modeling and Simulation) techniques. Firstly, We drew up the scenario from the application concepts and the predicted dormant reliability Secondly, we performed the modeling for a simulation program based on the scenario. Lastly we embodied the simulation program. After comparing and examining the difference between the simulation results and the theoretical estimates, we present the best periodic inspection plan for achieving the probability of success.

급성 골수성 백혈병 환자에서 G-CSF를 포함한 고용량 화학요법 후 자가 말초혈 조혈모세포이식의 효과

김병수,국훈,황태주,최철원,김준석,Kim, Byung Soo,Kook, Hoon,Hwang, Tai Ju,Choi, Chul Won,Kim, Jun Suk 대한면역학회 2002 Immune Network Vol.2 No.1

Background: The possibility that G-CSF recruits leukemic cells from the G0 to S phase, which may lead to a greater susceptibility to cytotoxic drugs, such as ara-C, has been presented in Harada's study. Methods: In this study, we referred to the protocol of Harada et al 1 to try G-CSF combined marrow-ablative chemotherapy and autologous PBSCT, for the treatment of AML patients in CR1 status. Between January 1997 and March 1998, six AML patients (3: children, 3: adults) in CR1 status were autografted and followed up to 3 years. Results: The major regimen related toxicity was composed of mucositis and diarrhea without death. The time of ANC recovery to 500/L and 1,000/L was 11~48 and 16~81 days, respectively. The mean time of platelet recovery to 20,000/L and 50,000/L was 21~233 and 35~370 days, respectively. The platelet recovery time to 50,000/L was markedly prolonged for more than 100 days in four patients (66.7%). Moreover, four patients (66.7%) experienced a relapse of leukemia after transplantation, with a mean interval of 147.5 days after PBSCT. Two patients were in CR status for 53 and 51 months after PBSCT, respectively. Conclusion: The G-CSF combined marrow-ablative chemotherapy and autologous PBSCT resulted in a markedly delayed platelet recovery and no advantages for decreasing the relapse rate of AML. But, further studies will be warranted.

압전센서를 이용한 구조물 국부/광역 손상 진단 시스템

김병수,권혁상,김진욱,노용래,Kim, Byung-Soo,Kwon, Hyeok-Sang,Kim, Jin-Wook,Roh, Yong-Rae 한국음향학회 2009 韓國音響學會誌 Vol.28 No.4

본 논문에서는 오실레이터 센서와 램파 센서를 결합하여 구조물 손상 진단을 위한 통합된 압전 센서 시스템을 제안한다. 구조물 손상으로 인한 공진주파수 변화를 관측 할 수 있는 오실레이터 센서는 손상 정도에 민감하게 반응하고 구조가 단순한 장치이지만 측정 범위가 센서 주위로 제한되는 특성을 가진다. 반면에 램파를 이용한 진단 시스템은 원거리에 위치한 구조물의 손상부를 감지하기에 유용하다. 본 논문에서는 오실레이터 센서를 이용한 취약 지점의 국부적인 손상 진단 방식과 램파를 이용한 광역적인 손상 진단 방식을 결합하여 각 시스템의 장점들을 활용할 수 있는 센서 시스템의 적용가능성을 연구하였다. PZT소자를 알루미늄 판에 적용하여, 알루미늄 판의 손상 정도에 따른 오실레이터 공진주파수의 변화와 램파 신호의 Time of flight 그리고 진폭의 변화를 이용하여 크랙의 위치와 크기, 개수의 판별 가능성을 제시하고 실험을 통하여 그 타당성을 검증하였다. In the present work, a sensor system composed of an oscillator sensor and a Lamb wave sensor is proposed for the purpose of structural health monitoring. The oscillator sensing system detecting the shift of a structural resonant frequency in proportion to the amount of defects in the structure is a pretty sensitive and simple device, but its detectable range is limited to its local zone. The Lamb wave sensor system, however, is applicable to global detection of the defects. This study is aimed at investigating the feasible combination of the two systems to exploits their merits simultaneously. The scheme to use PZT patches as the oscillator sensor as well as the Lamb wave sensor was proposed to identify the position, length and number of cracks by means of TOF and amplitude of signals, and its validity was confirmed through experiments.