직접 용액 코팅법에 의해 제조한 CuInSe₂ 에 잔존하는 탄소 불순물층 형성에 관한 연구

안세진,어영주,곽지혜,윤경훈,조아라,Ahn, SeJin,Rehan, Shanza,Eo, Young-Joo,Gwak, Jihye,Yoon, Kyunghoon,Cho, Ara 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.1

Formation mechanism of residual carbon layer, frequently observed in the $CuInSe_2$ (CIS) thin film prepared by direct solution coating routes, was investigated in order to find a way to eliminate it. As a model system, a methanol solution with dissolved Cu and In salts, whose viscosity was adjusted by adding ethylcellulose (EC), was chosen. It was found that a double layer, a top metal ion-derived film and bottom EC-derived layer, formed during an air drying step presumably due to different solubility between metal salts and EC in methanol. Consequently, the top metal ion-derived film acts as a barrier layer inhibiting further thermal decomposition of underlying EC, resulting a formation of bottom carbon residue layer.

다양한 크기와 주파수 그리고 감쇠를 갖는 상하방향 전신 충격진동에 대한 불편함

안세진(Sejin Ahn),Michael J. Griffin,유완석(Wansuk Yoo),김민석(Minseok Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Shocks are excited by impulsive forces and cause discomfort in vehicles. Current standards define means of evaluating shocks and predicting their discomfort, but the methods are based on research with a restricted range of shocks. This experimental study was designed to investigate the discomfort of seated subjects exposed to a wide range of vertical shocks. Shocks were produced from the responses of one degree-of-freedom models, with 16 natural frequencies (from 0.5 to 16 ㎐) and four damping ratios (0.05 0.1, 0.2 and 0.4), to a hanning-windowed half-sine force inputs. Each type of shock was presented at five vibration dose values in the range 0.35 ㎳<SUP>-1.75</SUP> to 2.89 ㎳<SUP>-1.75</SUP>. Fifteen subjects used magnitude estimation method to judge the discomfort of all shocks. The exponent in Stevens' power law, indicating the rate of growth in discomfort with shock magnitude, decreased with increasing fundamental frequency of the shocks. At all magnitudes, the equivalent comfort contours showed greatest sensitivity to shocks having fundamental frequencies in the range 4 to 12.5 ㎐. At low magnitudes the variations in discomfort with the shock fundamental frequency were similar to the frequency weighting Wb in BS 6841, but low frequency high magnitudes shocks produced greater discomfort than predicted by this weighting. At some frequencies, for the same unweighted vibration dose value, there were small but significant differences in discomfort caused by shocks having different damping ratios. The rate of increase in discomfort with increasing shock magnitude depends on the fundamental frequency of the shock. In consequence, the frequency-dependence of discomfort produced by vertical shocks depends on shock magnitude. For shocks of low and moderate discomfort, the current methods seem reasonable, but the response to higher magnitude shocks needs further investigation.

셀렌화 열처리 시 Se 분압의 정량화 및 Se 분압이 용액공정으로 제조한 CISe 박막 태양전지 특성에 미치는 영향

안세진(SeJin Ahn),조아라(Ara Cho),곽지혜(Jihye Gwak),윤재호(Jaeho Yun),어영주(Young Joo Eo) 한국신재생에너지학회 2016 한국신재생에너지학회 학술대회논문집 Vol.2016 No.5

승용차량용 연료탱크 슬로싱 현상에 대한 실험적 고찰 및 평가 방법에 대한 연구

안세진(Sejin Ahn),윤성호(Seongho Yoon) 한국소음진동공학회 2014 한국소음진동공학회 논문집 Vol.24 No.6

직접 용액 코팅법에 의해 제조한 CuInSe₂에 잔존하는 탄소 불순물층 형성에 관한 연구

안세진(SeJin Ahn),Shanza Rehan,어영주(Young-Joo Eo),곽지혜(Jihye Gwak),윤경훈(Kyunghoon Yoon),조아라(Ara Cho) 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.1

Formation mechanism of residual carbon layer, frequently observed in the CuInSe₂ (CIS) thin film prepared by direct solution coating routes, was investigated in order to find a way to eliminate it. As a model system, a methanol solution with dissolved Cu and In salts, whose viscosity was adjusted by adding ethylcellulose (EC), was chosen. It was found that a double layer, a top metal ion-derived film and bottom EC-derived layer, formed during an air drying step presumably due to different solubility between metal salts and EC in methanol. Consequently, the top metal ion-derived film acts as a barrier layer inhibiting further thermal decomposition of underlying EC, resulting a formation of bottom carbon residue layer.

한반도 연안 해양지형에 대한 시공간적 인식의 변화 : 18세기 후반부터 20세기 중반 해도에 나타난 한반도 연안 해양지명을 중심으로

안세진(Sejin Ahn),서지원(Ji Won Suh),성효현(Hyo Hyun Sung) 대한지리학회 2019 대한지리학회지 Vol.54 No.3

지명은 장소나 지형을 가리키는 기호를 넘어, 생활환경에 대한 인간의 인지적 표현으로 일종의 공간인식의 결과물이다. 본 연구는 18세기 후반부터 20세기 중반 한반도 연안 해도에 나타난 해양지명의 공간적 분포 특색과 지형의 속성을 강화도 조약 이전, 강화도 조약 이후부터 국권 피탈 전, 국권 피탈 이후부터 대한민국 수로과 설립 전까지 세 개 시기를 바탕으로 분석하여 해양지형에 대한 시공간적 인식의 변화를 살펴보았다. 연구결과, 강화도 조약 이전에는 주로 영국과 프랑스를 중심으로 동한만, 태안 등 일부 해역에서 만, 암초 등의 해양지형이 주로 인식되었다. 반면, 강화도 조약 이후 영국, 프랑스, 러시아, 미국, 일본 등 여러 국가가 한반도 해역을 본격적으로 측량하면서 한반도 해역의 해양지형에 대한 공간적 인식이 전 연안으로 확장되었고, 바다, 수로지형, 만입지형, 암초, 사퇴·천퇴 등 다양한 해양지형이 인식되었다. 일제강점기에는 전 시기보다 수적으로 많은 해양지형이 인식되지는 않았지만, 일본을 통해 군산, 목포와 같은 개항장을 중심으로 암초와 수로지형이 주로 인식되고 집중적으로 지명이 명명되었다. 나아가 당시의 시대적 상황 및 필요에 따라 한반도 연안해역을 측량했던 국가 간 공간적 인식의 범위 및 인식되는 지형의 종류가 다름을 확인하였다. This study investigated the changes in spatial and temporal recognition of marine geographical features by analyzing the spatial distribution of marine geographical names and those of feature types(generic terms) from the late 18th century to the middle of 20th century. In the late 18th century, only a limited number of marine geographical features such as bays, reefs and rocks were recognized in some areas such as Donghan Man and Taean. However, after the Ganghwa Treaty, various countries such as Britain, France, Russia, United States, and Japan surveyed actively, then the spatial recognition of marine geographical features was extended to all of the Korean coasts and various types of feature were recognized. During the Japanese colonial period, although the marine geographical features were not recognized more than the previous period, the waterway, reefs, and rocks around the treaty ports were recognized. In addition, it was identified that the range of spatial perception and the type of perceived features were different among the countries that surveyed the coastal area of the Korean peninsula according to the historical backgrounds and needs for investigation.

부모의 심리적 통제와 청소년 우울과의 관계에서 자율성 욕구 좌절과 속박감의 매개효과

안세진 ( Ahn Sejin ) 대한아동복지학회 2021 아동복지연구 Vol.19 No.2

This study aimed to find the mediating effect on the relationship between parental psychological control and adolescent depression. The subjects of this study were 325 middle school students nationwide. To analyze the data, Pearson’s correlations and regression analysis were used with SPSS 21.0. The results were as follows: First, a correlation analysis was conducted to examine the relationship between parents’ psychological control, autonomy need thwarting, entrapment, and adolescent depression. The results established that there were significant positive correlations among all the main variables. Second, the mediating role of autonomy need thwarting on the relationship between parental psychological control and adolescent depression was confirmed. Third, the mediating effect of entrapment on the relationship between parental psychological control and adolescent depression was confirmed. Based on these results, the significance and implications of this study were presented, and the limitations of the study and the suggestions for subsequent research were discussed.

오더 해석 기법을 이용한 스틸휠 장착차량의 조향휠 진동 분석

안세진(Sejin Ahn),박준용(Junyong Park),문경섭(Kungsup Mun),유완석(Wansuk Yoo),배명호(Myungho Bae) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

The steel wheels are still used in the passenger cars because of their low cost of production although the aluminum wheels have many advantages in their performance and appearance. Imbalance and/or misalignment of the steel wheels excite the knuckles of the vehicle, which causes the steering wheel vibration. Both the constant velocity driving test and the run-up test are fulfilled in this study to analysis the causes and path of the steering wheel vibration generated from the steel wheels. And this study shows that the steering wheel vibration is affected by the fastening torque of the wheel mounting bolts between the steel wheel and the suspension disk.

청년세대의 집단주의 성향과 호감 및 행동 평가의 관계에 미치는 세대의 조절효과

안세진(Sejin Ahn),도보람(Boram Do) 한국인사조직학회 2023 인사조직연구 Vol.31 No.2

본 연구는 조직 구성원의 집단주의-개인주의 성향과 관련하여 해당 구성원의 세대별로 형성된 고정관념이 있음을 가정하고, 이에 부합하거나 반대되는 성향을 보이는 구성원(대상자)에 대해 사람들은 어떠한 평가를 하는지 기대위반이론(expectancy violation theory)을 적용하여 살펴보고자 하였다. 기대위반이론은 한 개인이 보여주는 긍정적인 성향이 해당 개인이 속한 사회적 범주의 고정관념을 위반하는 경우, 동일한 성향이 자신이 속한 사회적 범주의 고정관념에 부합하는 개인의 경우보다 더욱 긍정적으로 평가된다는 이론이다. 이를 세대의 맥락에 적용하면 청년세대의 구성원이 소속된 세대의 고정관념에 반하는 긍정적 성향인 집단주의 성향을 보여줄 때, 기성세대가 동일한 집단주의 성향을 보일 때 보다 더욱 호의적인 평가를 받을 것이라는 가설을 상정할 수 있다. 실증적으로 먼저 277명의 패널을 대상으로 한 예비연구 설문을 통하여 청년세대(20-30대 초반)가 기성세대(40대 후반 이상) 대비, 집단주의 성향이 낮고 개인주의 성향이 높다는 고정관념이 한국 사회에 존재한다는 것을 밝혔다. 본 연구에서는 280명의 추가 패널참여자를 대상으로 온라인 실험을 수행하였다. 각 참가자는 집단주의 또는 개인주의 성향을 가진 청년세대(29세) 혹은 기성세대(50세) 대상자를 묘사하는 시나리오를 읽고 대상자를 동료로 상상하여 질문에 응답하도록 했다. 연구결과, 대상자가 집단주의 성향일 때(개인주의 성향일 때보다) 평가자의 대상자에 대한 호감을 매개로 대상자의 도움행동 및 역할내행동 예측이 높게 나타나는데, 이러한 집단주의-개인주의 조건 영향의 차이는 대상자가 청년세대일 때(기성세대일 때 보다) 더욱 강하게 나타나는 것으로 드러났다. 이러한 결과는 조직 구성원과 관리자에게 세대 갈등 및 관리에 대한 의미있는 시사점을 제시하고, 향후 고정관념 연구 확장을 위한 토대를 제공한다. Assuming the stereotypes attached to younger and older generation employees regarding their individualistic and collectivistic traits in organizations, this study draws from expectancy-violation theory to examine how organizational members showing counter-stereotypical behaviors are perceived and reacted to in organizational contexts. In the preliminary study, a questionnaire completed by 277 panelists confirmed the assumed stereotypes that respondents believed the younger generation has stronger individualistic traits (compared to the older generation). In the main study, an experiment was conducted with an additional 280 panelists. Each participant read a scenario describing a younger or older protagonist with individualistic or collectivistic traits and was asked to respond to the questionnaire imagining the protagonist as a co-worker. Our findings showed that the protagonist's collectivistic traits are positively related to respondents' liking of the protagonist, higher expectations of the protagonist's in-role behaviors, and helping behaviors. In addition, these positive effects of collectivistic traits were stronger when the protagonist in the scenario belonged to the younger generation, thus showing counter-stereotypical traits, than in the case of the older generation showing stereotype-confirming traits. These results contribute to the stereotype literature in the field of organizational behavior and provide meaningful implications for managers interacting with others from different social categories.

전 세계 해저지형 분류를 위한 분류기준과 규칙 도출에 관한 연구

안세진(Sejin Ahn),성효현(Hyo Hyun Sung),한현철(Hyun-Chul Han) 대한지리학회 2023 대한지리학회지 Vol.58 No.1