혼합가스 주입형 연료전지를 위한 전지 디자인

박병탁,윤성필,Park, Byung-Tak,Yoon, Sung Pil 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.12

In this study, we fabricated honeycomb type Mixed-Gas Fuel Cell (MGFC) which has advantages of stacking to the axial direction and increasing volume power density. Honeycomb-shaped anode with four channels was prepared by dry pressing method. Two alternative channels were coated with electrolyte and cathode slurry in order to make cathodic reaction sites and the others were filled with partial oxidation (POX) catalyst to increase fuel conversion. Furthermore we employed the sol-gel technique which can increase cell performance and decrease carbon coking.

Methane-Air 혼합 Gas에서 구동하는 하니컴 형태의 SC-SOFC

박병탁(Park, Byung-Tak),윤성필(Yoon, Sung Pil),김현재(Kim, Hyun Jae),남석우(Nam, Suk Woo),한종희(Han, Jonghee),임태훈(Lim, Tae-Hoon),홍성안(Hong, Seong-Ahn),이덕열(Lee, Dokyol) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06

One of the most critical issues in sol id oxide fuel cell (SOFC)running on hydrocarbon fuels is the risk of carbon formation from the fuel gas. The simple method to reduce the risk of carbon formation from the reactions is to add steam to the fuel stream, leading to the carbon gasification react ion. However, the addition of steam to fuel is not appropriate for the auxiliary power unit (APU) and potable power generation (PPG) systems due to an increase of complexity and bulkiness. In this regard, many researchers have focused on so-called 'direct methane' operation of SOFC, which works with dry methane without coking. However, coking can be suppressed only by the operation with a high current density, which may be a drawback especially for the APU and PPG systems. The single chamber fuel cell (SC-SOFC) is a novel simplification of the conventional SOFC into which a premixed fuel/air mixture is introduced. It relies on the selectivity of the anode and cathode catalysts to generate a chemical potential gradient across the cell. Moreover it allows compact and seal-free stack design. In this study, we fabricated honeycomb type mixed-gas fuel cell (MGFC) which has advantages of stacking to the axial direction and increasing volume power density. Honeycomb-structured SOFC with four channels was prepared by dry pressing method. Two alternative channels were coated with electrolyte and cathode slurry in order to make cathodic reaction sites. We will discuss that the anode supported honeycomb type cell running on mixed gas condition.

재생에너지 연계 그린수소 생산단지 구축

박상대(Sangdae Park),박병탁(Byungtak Park),김태홍(TaeHong Kim),허진혁(JinHuek Hur),정기석(KiSuk Chung) 한국가스학회 2023 한국가스학회 학술대회논문집 Vol.2023 No.11

질감을 활용한 촉지도 제작을 위한 3D 프린팅 프로그램 설계 및 촉감 모델링에 관한 연구

이우열(Lee Woo Yeol ),박병탁(Park Byung Tak),이승태(Lee Seung Tae),전홍령(Jeon Hong Ryung),전철홍(Jeon Chul Hong) 한국통신학회 2017 한국통신학회 학술대회논문집 Vol.2017 No.1

신불안.우울척도에 의한 대학 신입생의 정신건강 평가

박형배,김진성,김창수,박병탁,이종범,이중훈,정성덕,Park, Hyeong-Bae,Kim, Jin-Sung,Kim, Chang-Su,Park, Byung-Tak,Lee, Jong-Bum,Lee, Jung-Hoon,Cheung, Seung-Douk 영남의대학술지편집위원회 1987 Yeungnam University Journal of Medicine Vol.4 No.1

1986년 영남대학교 신입생 4,834명 (남학생 ; 3,499명, 여학생 ; 1,335명)을 대상으로 1986년 1월부터 동년 2월에 걸쳐 신불안 우울척도를 사용하여 평가한 불안 우울성적의 결과는 다음과 같다. 1. 불안 우울성적의 평균총점은 남학생이 $31.49{\pm}6.57$이었고 여학생이 $33.37{\pm}6.84$로 양군간의 유의한 차이가 있었다(P<0.001). 2. 신불안 우울척도의 항목별 성적이 남녀학생 공히 높은 항목은 수면장애, 후회감, 성욕감퇴 및 피로감 등이었고 남녀학생 공히 낮은 항목은 두려움, 정신운동흥분과 지연, 졸도감 및 절망감 등이었다. 3. 신불안 우울척도의 총점이 50점 이상인 고득점자는 남학생이 99명(2.8%), 여학생이 40명(3.0%)이었다. 4. 사회정신의학적 요인들중 남녀학생의 불안 우울성적에 공히 유의한 영향을 끼친 것은 소속대학이나 소속학과에 대하여 불만인 경우, 가족분위기나 부모와의 친숙도에 대하여 불만인 경우, 과거, 현재, 미래의 자아상에 대한 태도가 비관적인 경우(이상 각각 P<0.0001) 등이며, 성장지가 시단위 이하인 경우(각각 P<0.05)등이었다. 5. 신불안 우울척도와 Zung의 자가평가 불안척도 및 우울척도간의 상관관계는 각각 0.64, 0.61의 다소 높은 상관관계를 보였다. 또 신불안 우울척도와 Leeds대학의 불안 우울척도간에는 상관계수 0.77의 높은 상관관계를 보였다. The authors studied anxiety-depression using New Anxiety-Depression Scale(NADS), in the subjects of 3,499male and 1,335 female college freshmen of Yeungnam University. The authors collected the reports of NADS during the periods from January to February, 1986, and applied ANOVA and t-test on anxiety-depression scores in order to compare them between various psychosocial factors, and sexs. The results are as follows : There was significant difference in the mean awerages of total scores between male and female students: male students scored $31.49{\pm}6.57$ female students scored $33.37{\pm}6.84$ (P<0.001) The anxiety-depression scores relating to the items of sleep disturbance, apprehension, decreased libido and fatigue were relatively higher in both groups. Ninety-nine male students(2.8%) showed seriously high degree anxiety-depression scores of 50 or higher, while forty female students(3.0%) showed the same scores. There was a strong tendency toward higher anxiety-depression scores in the students who were dissatisfied with their home atmosphere, colleges, departments and familiarity of parents, and those who had pessimistic views of self image in the past, present, or fartare in both groups (P<0.001) The students whose maturation locations were below city level, showed higher level of anxiety-depression scores in both groups (P<0.05) NADS and SAS, SDS, and Leeds scale were correlated significantly in 0.64, 0.61, and 0.77 of correlation coefficient.

최적 버티포트 네트워크 선정 기초 연구

김상현(Sang Hyun Kim),박병탁(Byeong Tak Park),김휘양(Huiyang Kim) 한국항공우주학회 2022 한국항공우주학회 학술발표회 논문집 Vol.2022 No.4

Markov Chain Monte Carlo 시뮬레이션을 이용한 항공교통시스템 위험도 평가 연구

김주현(Ju Hyeon Kim),박병탁(Byeong Tak Park),김휘양(Huiyang Kim),김상현(Sang Hyun Kim) 한국항공우주학회 2022 한국항공우주학회 학술발표회 논문집 Vol.2022 No.4

[자유기고] KSEA 튀르키예-시리아 강진 현지조사 리포트

고창우(Ko, Chang-Woo),김태진(Kim, Taejin),강두현(Kang, Doohyun),김지상(Kim, Ji Sang),남숭현(Nam, Soong Hyun),박병탁(Park, Pyeong Tak) 대한건축학회 2023 建築 Vol.67 No.8

非行靑少年의 父母喪失에 關한 考察

朴炳卓 大韓神經精神醫學會 1978 신경정신의학 Vol.17 No.3

The pressing need to study the prevention as well as the nature and cause of delinquent behavior has yielded some studies on the family dynamics and some theoretical review, but scanty systematic works on parental loss. In the present study, the author attempted to study their parental loss by death and seperation, other serious parental problems and the parental surrogate after loss. For the above purpose, the author distributed questionaires to 380 male delinquents in a "T" juvenile reformatory near Taegu area during September, 1977. As control groups, he selected at random the same number of psychiatric patients and students respectively matched by age and sex. The results could be summarized as follows; The mean age of delinquents was 17.5 years, 18 being the most common. The educational level and the economic status of the delinquent group was much lower than those of the control groups. The incidence of the parental loss by death and separation, and other serious parental problems was prominently higher (65%) in delinquents; being twice as high as the patient group and five times that of the student group. Among parental loss and other parental problems, paternal defect was more frequent than maternal defect. Considering the over-lapping of parental loss and other problems seen in the same delinquents in about (25%) of the group, the seriousness of parental problems seems to be quiet impressive. As to the rate of early parental loss by death, only 12% of all deliquents lost one or both parents before reaching the age of 5. However, the rate of maternal loss in this period was relatively higher in this group, compared with that of control groups. In an analysis of after care by parental surrogates in the parental loss group, the study group tended to be reared by non-blood relatives, while in both control groups they were rather closely cared for by immediate relatives. Lastly, there was no significant difference in the types of delinquent behavior between delinquents from broken homes and non-broken homes.

精神疾患者의 最初記憶과 꿈의 內容分析

朴炳卓 영남대학교 의과대학 1984 Yeungnam University Journal of Medicine Vol.1 No.1

大邱直割市에 所在한 5개 綜合病院 神經精神科와 2개 個人 神經精神科醫院의 外來 및 入院患者 가운데 18세에서 30세 사이 年齡의 精神分裂症患者 293명(男子 161명, 女子 132명)과 神經症患者301명(男子 164명,女子 137명 ) 및 大邱直割市와 그 인근지역에 居住하는 一般住民 310명(男子 169명, 女子141명)에서 蒐集한 最近記憶과 꿈의 內容을 性別 및 診斷別로 集團간에 比較하였다. 이러한 目的을 위하여 最初記憶과 꿈을 同時에 평가하는데 적용할 수 있는 功擊性과 依存性尺度를 새로 考案하였고 尺度의 信賴度 檢定過程을 거쳐서 전 對象集團에 적용하였다. 性別, 診斷別로 각기 다른 集團간의 最初記憶과 꿈의 內容을 比較하여 얻은 成績을 要約하면 다음과 같다. 最初記憶의 內容은 診斷別 各 集團간에 더 많은 차이를 보였고 꿈의 內容은 性別 各 集團간에 더 많은 차이를 보였다. 最初記憶과 꿈의 主題分布上 어떤 集團에서나 共히 功擊性보다 依存性主題가 더 많았다. 또 功擊性主題는 最初記憶에서 보다 꿈에 더 많았다. 最初記憶의 主題分布上 功擊性主題는 精神分裂症群, 神經症群, 對照群의 順으로 많았던 반면 依存性主題는 이와 逆順이었다. 攻擊性主題中 被攻擊的態度는 精神分裂症群에 많았다. 依存性主題中 觀望的 態度는 神經症群에 많았고 滿足的態度는 對照群에 많았다. 高度의 攻擊性 및 依存性主題는 神經症群에 많았다. 꿈의 主題分布는 精神分裂症群의 男女集團 간에 차이가 있었다. 즉 攻擊性主題中 積極的이고 高度의 攻擊性은 男子集團에, 그리고 依存性主題中 挫折的 態度는 女子集團에 많았다. 꿈의 主題分布상 依存性主題의 觀望的 態度는 各對象群의 女子集團에 더 많았고 滿足的 態度는 男子集團에 더 많았다. The earliest memories and dreams have been investigated in many aspects; biological, psychological, statistical, and psychotherapeutic, in psychiatric field. The approach methods to these psychic contents are innumerable according to the schools, the collector’s attitudes to these materials, the collecting methods and the variable factors of the reporter. In this study the author attempted to compare the distribution of the aggression and dependency themes in these psychic contents among groups of different sexes and clinical diagnoses. In this purpose the author devised new scales, the Aggression and the Dependency Scales for the earliest memories and dreams which are composed of 12-theme classes, according to 3 aspects of the ego attitudes and 4 degrees of the intensity of drives. The scales were tested on a series of the earliest memories and dreams from 100 male medical students by two raters. The interrater reliabilities, measured by kappa method, were all significant at better than the .001 level. The author collected the reports of the earliest memories and dreams from 293 schizophrenics (161 males and 132 females) and 301 neurotics (164 males and 137 females) who were either outpatients or inpatients of 5 general hospitals and 2 private neurospychiatric clinics and from 310 controls(169 males and 141 females) who were either students, housewives or employees in Taegu area during the periods from March to August, 1980 and from April to August, 1983. The author compared the contents of the earliest memories and dreams from these 3 clinical groups on the newly devised scales and the results could be summarized as follows: In general, the contents of the earliest memories showed more differences among diagnostically different groups, while the contents of dreams showed more differences among sexually different groups. The dependency themes were more frequent than the aggression thems in all groups. The aggression themes were more frequent in dreams than in the earliest memories. Of the earliest memory themes, the distribution of the aggression themes was different among clinical groups, i.e., most frequent in schizophrenics, next in neurotics, and least in controls. The distribution of the dependency themes was in reverse order. Attitudes of being attacked were more frequent in schizophrenics. Observing attitudes of dependency need were more frequent in neurotics while gratifying attitudes were more frequent in controls. Highest degrees of aggression and delpendency were more frequent in neurotics. In the distribution of the dream themes, there were some differences among male and female schizophrenics. Aggression themes, especially active and the highest degree of aggression, were more frequent in male sclizophrenics, while dependency themes, especially frustrated themes, were more frequent in female schizophrenics. Among 3 clinical groups, observing attitudes of dependency need were more frequent in female groups, while gratifying attitudes were more frequent in male groups.