펄스레이저증착법으로 제작된 YSZ 박막의 초기 성장 메커니즘에 관한 연구

박상신 부산대학교 2009 국내석사

Recent efforts for the realization oxide based electronics, there have been large research activities on the high quality oxide films. When the oxide films are grown on non-oxide substrates, however, the interface interdiffusion prohibits to achieve high quality oxide films. In the case of Si substrate, there exists lattice mismatch and interface interdiffusion when oxide films deposited on direct Si surface. Furthermore, the formation of SiO2 layer plays a negative role when ZrO2 or HfO2 layers were deposited on Si to form metal-oxide semiconductors. Therefore, it is important to understand the details of initial growth mechanism of oxide films on semiconductor substrate. In this thesis, we studied the interface characteristics on yttria-stabilized zirconia (YSZ) films grown Si and Al2O3 substrates. YSZ film is one of the promising candidates to achieve high quality oxide thin films on Si substrate for the oxide based electronics application. Varying growth and post annealing temperature, we were able to monitor chemical states of each element and over all structure of the thin films. we found that ZrSiO4 forms at the interface for the samples deposited higher temperature and post annealed without oxygen. In the case of Al2O3 substrate, the detailed of YSZ structure has been examined for different deposition temperature and oxygen pressure. For the samples grown above 400 ℃, (111) orientation of YSZ peak was observed. As the oxygen partial pressure increases, the additional (002) peak grows in the film indicating the polycrystalline nature of the film. Furthermore, for the samples grown at higher temperature and lower oxygen pressure, the surface become flatter and the overall film thickness decreases.

성장지향성이 대학생활적응에 미치는 영향 : 대인관계의 매개효과와 강점활용의 조절된 매개효과

박상신 광운대학교 대학원 2021 국내석사

표고버섯中의 Light-induced mitochondrial ATPase의 光受容體와 酵素的 特性에 關한 硏究

박상신 東國大學校 大學院 1991 국내박사

茯笭중의 carboxyl proteinase의 분리정제 및 그 성질에 관한 연구(II)

박상신 東國大學校 大學院 1985 국내석사

Characteristics of metabolic syndrome and its association with dairy consumption in Mongolians

박상신 서울대학교 보건대학원 2009 국내석사

유아의 언어이해능력과 마음이해능력 : 계층 및 연령에 따른 차이를 중심으로

박상신 서울대학교 대학원 2009 국내석사

쌍태 임신의 주산기 예후 예측을 위한 임신 중기 태아 배둘레비의 유용성

박상신 서울대학교 대학원 2010 국내석사

Performance evaluation of hash join on flash memory SSDs

박상신 성균관대학교 일반대학원 2011 국내석사

Hash join is one of the core algorithms in databases management systems. If a hash join cannot complete in one-pass because the available memory is insufficient (i.e. hash table overflow), however, it may incur a few sequential writes and excessive random reads. With harddisk as the tempoary storage for hash joins, the I/O time would be dominated by slow random reads in its probing phase. Meanwhile, flash memory based SSDs (flash SSDs) are becoming popular, and we will witness in the foreseeable future that flash SSDs replace harddisks in enterprise databases. In contrast to harddisk, flash SSD without any mechanical component has fast latency in random reads, and thus it can boost hash join performance. In this paper, we investigate several important and practical issues when flash SSD is used as tempoary storage for hash join. First, we reveal the I/O patterns of hash join in detail and explain why flash SSD can outperform harddisk by more than an order of magnitude. Second, we present and analyze the impact of cluster size (i.e. I/O unit in hash join) on performance. Finally, we emperically demonstrate that, while a commerical query optimizer is error-prone in predicting the execution time with harddisk as temporary storage, it can precisely estimate the execution time with flash SSD. In summary, we show that, when used as temporary storage for hash join, flash SSD will provide more reliable cost estimation as well as fast performance. 데이터베이스 관리 시스템의 핵심 알고리즘인 해쉬 조인은 해싱을 위한 메모리가 부족한 경우 (즉, 해쉬 테이블 오버플로우) 디스크 입출력를 유발하게 된다. 하드디스크를 임시 저장공간으로 사용할 경우, 해쉬 조인의 probing 단계에서 과도한 임의 읽기로 인해 I/O 시간이 성능을 저하시키게 된다. 한편, 플래시메모리 SSD가 저장장치로 각광을 받고 있으며, 머지않아 엔터프라이즈 환경에서 하드디스크를 대체할 것으로 예상 된다. 하드디스크와 달리, 기계적인 동작 장치가 없는 플래시메모리 SSD의 경우 임의 읽기에서 빠른 성능을 보이기 때문에 해쉬 조인의 성능을 크게 향상시킬 수 있다. 본 논문에서는 플래시메모리 SSD를 해쉬 조인을 위한 임시 저장공간으로 사용할 경우의 몇 가지 중요하고 현실적인 이슈들을 다룬다. 우선, 해쉬 조인의 I/O 패턴을 자세히 설명하고, 하드디스크에 비해 플래시메모리 SSD가 수십 배에 가까운 성능 향상을 보이는 이유를 설명한다. 다음으로, 클러스터 크기(즉, 해쉬 조인 알고리즘에서 사용하는 I/O 단위)가 성능에 미치는 영향을 제시하고 분석한다. 마지막으로, 하드디스크의 경우, DBMS의 질의 최적화기가 산출하는 비용이 실 수행시간과 편차가 클 수 있는데 반해, 플래시메모리 SSD의 경우 비용 산출을 정확히 하게 됨을 실험적으로 보인다. 결론적으로, 플래시메모리 SSD를 해쉬 조인을 위한 임시 저장공간으로 사용할 경우, 빠른 성능과 더불어 질의 최적화기의 비용 산출이 훨씬 더 신뢰할 수 있음을 보인다.

중학생의 리더쉽기술과 갈등해결전략과의 관계

박상신 충북대학교 2008 국내석사

The purpose of this study was to examine the relationship between leadership skills and conflict management strategy of middle school students. In order to achieve this purpose of study, the research questions were as follows: 〔Research problem 1〕 Are there significant gender differences in leadership skills? 〔Research problem 2〕 Are there significant gender differences in conflict management strategy? 〔Research problem 3〕 Are there any significant relationships between leadership skills and conflict management strategy of middle-school students? In order to verify these research questions, this study performed the survey 275 students (141 boys, 136 girls) in Cheongju, Chunggbuk. The measurement instruments used in this study were the leadership-skill questionnaire manufactured by Han Seon-hwa(2005) and the scale of conflict management strategy in a peer relation by Lee Eun-hae, Go Yun-ju, and Oh Won-jeong(2000). The collected data was performed statistical processing with SAS program, and then was analyzed by using t-test. The results, which were clarified in this study, were as follows. First, there were significant gender differences in leadership skills. Female students were indicated to have a higher level in communication skill, human-relation skill, and group-activity skill, compared to male students. Second, there were significant gender differences in conflict management strategy of middle-school students. Male students were indicated to use the rule strategy and concession strategy more than female students. Third, there were significant relationships between the leadership skills and the conflict management strategy of middle-school students. The students in a group with higher leadership skills were indicated to use higher conflict management strategy compared to the students in a group with the lower cooperation, compromise, and rule strategy. Given trying to synthesize the above results, in order to smoothly solve a conflict in adolescent period, and expects, it raises the development and supply of the educational program on leadership skills and conflict management, and the necessity of education.

한국인 제2형 당뇨병 환자에서 MCP-1 유전자다형성과 비만의 연관성

박상신 충북대학교 2023 국내석사

Background: MCP-1 is a member of the CC chemokine which plays a pivotal role in inflammatory process by regulating migration and infiltration of monocytes and macrophages. Although MCP-1 gene polymorphism has been suggested to correlate with chronic inflammatory diseases including insulin resistance and metabolic syndrome, there are few studies on the association with obesity. In the present study, we evaluated the association between MCP-1 2518 A/G polymorphism and obesity in Korean type 2 diabetes. Methods: We conducted a retrospective case-control study. We enrolled 526 patients with Korean type 2 diabetes and compared the clinical and biochemical characteristics, diabetic complications and MCP-1 2518 A/Gpolymorphism according to the presence or absence of obesity using body mass index(BMI). MCP-1 2518 A/G genotyping was determined using the polymerase chain reaction and restriction fragment length polymorphism technology. Results: The obese group has more females, higher c-peptide, insulin, triglyceride, aspartate transaminase(AST) and alanine transaminase(ALT) levels(Table 1). The obese group has more higher prevalence of cardiovascular disease than the non-obese group although there was no difference in prevalence of cerebral infarction and microvascular complications such as diabetic neuropathy, retinopathy and nephropathy (Table 2). The obese group has a higher frequency of MCP-1 2518 AA genotypes and A alleles than the non-obese group(Table 3). Conclusions: Our results demonstrated that the MCP-1 2518 A/G polymorphism is associated with obesity in Korean type 2 diabetes. Patients carrying the AA genotype of the MCP-1 gene(non-G allele) were found more frequently in the obese group compared to that in the non-obese group. To validate our results, further studies are required in various ethnic group.