• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 2003년도 정기총회 및 학술발표회
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• pp.73-73
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• 2003

We report here the results on N-acetyl-N'-methylamide of alanine (Ac-Ala-NHMe) calculated using the ab initio molecular orbital method with the self-consistent reaction field (SCRF) theory at the HF level with the 6-3l+G(d) basis set to investigate the conformational preference of alanine depending on the backbone torsion angles $\square$ and$\square$ in the gas phase, chloroform, and water. There are seven local minima (LM) in the gas phase and two additional LM are found in chloroform and water. These two additional LM A (an $\square$-helical structure) and F (a polyproline structure) are stabilized only in solutions. In the gas phase, the lowest LM is the conformation C with a C$\sub$7/ intramolecular hydrogen bond and the relative conformational energies range from 0.3 to 6.0 ㎉/mol. In chloroform, the lowest LM is the conformation E (an extended structure) and the relative conformational energies range from 0.7 to 4.9 ㎉/mol. In particular, we identified 14 possible transition states connecting between seven LM in the gas phase. The search for transition states probable in chloroform and water is now in progress.

• The Journal of Asian Finance, Economics and Business
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• 제9권7호
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• pp.273-280
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• 2022

The study aimed to determine the impact of societal participation on the customer loyalty of Saudi banks and identify the statistical differences in customer loyalty according to sex, age, education level, and occupation type. The independent variable is corporate societal participation, and the dependent represents customer loyalty. Corporate societal programs have two dimensions: social participation and philanthropic participation. The research population consists of Saudi workers in three sectors: government, military, and private reached 3.58 million people in 2021. The unit of analysis is the Saudi employee in one formal industry and dealing with the Saudi banks that offered corporate societal participation programs. The research used the appropriate stratified sampling method, and the recommended sample size reached 387 respondents. A fully structured questionnaire is used. The study concluded that corporate social programs have not impacted customer loyalty, while corporate philanthropy programs strongly affected customer loyalty. On the other hand, there are no differences in customer loyalty according to demographics (sex, age, education, and occupation type). Finally, the study presents a set of recommendations in the field of corporate social responsibility and develops the local communities.

• International journal of advanced smart convergence
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• 제13권1호
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• pp.180-184
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• 2024

Since COVID-19, many foreign tourists have visited Korea for medical tourism. When statistical data were checked from 2022, after COVID-19, the number of foreign patients visiting Korea for two years was 24.8 million, an increase of 70.1% from 2020. It was confirmed that it has achieved a 50% level compared to 2019 (Statistics Office, 2023). Therefore, to create a development plan by linking medical tourism and wellness tourism, the purpose of this study is to find the link between medical tourism and wellness tourism as big data and present a development plan. In this research method, medical tourism, and wellness tourism for two years from 2022 to 2023 from the post-COVID period as big data are set as central keywords to compare text data to find common points. When analyzing wellness tourism and medical tourism, it was confirmed that most wellness tourism had a greater frequency than medical tourism. This confirmed that wellness tourism occupies a larger pie than medical tourism. As a result, when checking the word frequency, it was confirmed that wellness tourism and medical tourism share a lot as complex tourism products, and when checking 2-gram, to attract many medical tourists, it is necessary to combine medical tourism clusters and wellness tourism according to each other's characteristics among local governments.

• 유통과학연구
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• 제14권9호
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• pp.133-147
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• 2016

Purpose - The Purpose of this study is to observe the value of LOHAS as an exhibition that is perceived to be a specialized local exhibition with good fame and differentiated advantage as well as the spectators' will to visit the exhibition coming from the future behavior intention of visitors. Research design, data, and methodology - In order to achieve the purpose of this study, This study organized questionnaire after setting a hypothesis based on the theoretical background from the parameters. verification of the hypothesis by statistically analyzing the answers for questionnaire follows. Finally, the implication of this study is drawn through comprehensive discussion while This study indicated from the limits of the study and future direction for research. This study set up a model to research the influence on the structuring factors in LOHAS exhibition in forming perceived value, customer satisfaction and future behavior intention. Frequency analysis was used for getting demographic characteristics, verification of plausibility, reliability of measured parameters and factors analysis. This study have performed verification of difference at selection property level based on multiple regression analysis and demographic nature. Results - To summarize the study result, through the verification of hypothesis about meaningful influence among structuring factors in LOHAS exhibition, perceived value and customer satisfaction shows some noticeable points to focus on. That is, it is established things that partial adoption and meaning relationship of partial influence. The perceived value affected both customer satisfaction and future behavior intention meaningfully. Conclusions - This study could note that in the structuring factors of LOHAS exhibition, perceived value for visitors and customer satisfaction play their roles positively on the future behavior intention. In conclusion, this study implies that strategic measures are necessary to fulfill the structuring factors of LOHAS exhibition as they would make positive impact on acknowledged value, customer satisfaction and future behavior intention to contribute to the growth and development of LOHAS exhibition. Also it suggests that the method to join each other with activities is necessary to strengthen the properties of the exhibition and position well to be a solid local exhibition.

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 2003년도 정기총회 및 학술발표회
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• pp.75-75
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• 2003

We report here the results on N-acetyl-N'-dimethylamide of proline (Ac-Pro-NM $e_2$) calculated using the ab initio molecular orbital method with the self-consistent reaction field (SCRF) theory at the HF level with the 6-31+G(d) basis set to investigate the conformational preference of polyproline depending on the cis/trans peptide bonds and down/up puckerings along the backbone torsion angle $\square$ in the gas phase, chloroform, and water. In the gas phase, Ac-Pro-NM $e_2$ has seven local minima of tFd, tFu, cFd, cFu, cAu, tAu, and cAd conformations. In particular, polyproline conformations tFd, tFu, cFd, and cFu are found to be more stable than $\square$-helical conformations cAu, tAu, and cAd. In contrast, Ac-Pro-NHMe has seven local minima of tCd, tCu, cBd, cAu, tAu, cFd, and cFu conformations. Conformations tCd and tCu are found to be most stable, which is ascribed to the intramolecular hydrogen bond between C=O of acetyl group and $N^{~}$ H of N'-methyl amide group. The stability of the cFd conformation (i.e., the polyproline I structure) in chloroform is somewhat increased, relative to that in water, although tFd and tFu conformations (i.e., the polyproline II structure) are dominate both in chloroform and water. The population of backbone conformations feasible in chloroform and water is consistent with the experiments. This work is supported by a Korea Research Foundation Grant (KRF-2002-041-C00129).

• 한국지역지리학회지
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• 제22권2호
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• pp.424-438
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• 2016

도시쇠퇴와 공동화 현상을 방지하고 침체된 지역경제를 활성화시키기 위한 새로운 도시재생 패러다임이 등장하고 있다. 본 연구는 도시재생특별법에 제시된 쇠퇴기준과 공간자기상관 탐색을 기반으로 GIS 및 공간통계기법을 활용하여 도시쇠퇴 특성을 분석하는데 그 목적을 두고 있다. 광주광역시를 대상으로 하여 도시재생특별법에 제시된 쇠퇴 기준인 인구감소, 사업체감소, 노후건축물에 관한 지표를 적용함으로써 객관성을 확보하고자 하였다. 특히 GIS와 공간 통계기법을 적용함에 있어서 공간자기상관 탐색을 통해 도시쇠퇴 특성을 분석한다는 점에서 기존의 연구와 차별성을 지닌다. 전체적인 분석과정은 도시활성화지역 지정 기준을 원용하고, 공간탐색적 절차에 따라 단계적으로 추진하였다. 따라서 본 연구를 통해 제시된 공간통계분석 절차 및 도시쇠퇴 특성 분석의 결과는 대도시권 수준에서 도시쇠퇴 진단에 기여하고, 도시재생과 관련한 공간의사결정에 유용한 정보를 제공할 것으로 기대한다.

• 한국통신학회논문지
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• 제19권12호
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• pp.2409-2417
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• 1994

직교 이중회전 디지털 격차 필터는 고밀도 집적회로 실현에 아주 적합한 성질들을 가지고 있다. 예를 들면, 바로 옆의 프로세서들과만 연결되는 점, 규칙적인 구조를 갖는 점, 그리고 파이프라인화 할 수 있다는 점 등이다. 또한 이 필터들은 유한 워드 길이로 실현했을 때 좋은 수치적 성질을 갖는다는 것이 잘 알려져 있다. 비록 이 필터들은 '컬셋 분리 절차'를 이용하여 파이프라인화 될 수 있지만 이렇게 파이프라인화 된 필터는 귀환회로의 계산 시간에 의해 이 필터의 최대 데이터 처리속도가 제한된다는 단점이 있다. 본 논문에서는 귀환회로에 제한 받지 않고 원하는 만큼 데이타 속도를 높이거나 저파워 실현을 위한 직교 이중회선 디지탈 격차 필터의 새로운 파이프라인 방법을 제안하였다. 이 방법은 Schur 알고리즘, 필터 합성시 특정한 제약을 주는 필터 합성 방법, 그리고 다중 페이스 분해 방법에 근거하고 있다.

• 한국전산구조공학회논문집
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• 제25권4호
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• pp.287-292
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• 2012

본 연구에서는 다채널 자속누설 센서를 이용하여 강케이블의 국부손상을 검색하였다. 먼저 자속누설 기법을 고정된 케이블 구조물에 적용하기 위해 프로토타입의 8채널 자속누설 센서헤드를 제작하였고, 국부손상이 발생한 케이블을 구현하기 위하여 PVC 파이프에 강케이블을 채워 강케이블 다발 시편을 제작하였고, 케이블 시편 외부 및 내부에 다양한 크기 및 방향을 가지는 국부손상을 단계적으로 발생시켰다. 이와 같이 제작된 강케이블 시편을 대상으로 각 손상단계에서 자속누설 센서헤드를 이용하여 자속신호를 스캔하고 출력전압으로 표현하였다. 이어서 일반극치분포를 이용해 손상유무를 판단할 수 있는 기준이 되어줄 임계값을 설정하였고, 이를 각 채널에서 계측된 자속신호와 비교하여 객관적인 손상판단을 수행하였다. 또한 케이블 모니터링에 있어 가장 중요한 정보인 손상의 길이방향 위치를 효과적으로 검색하기 위해 모든 채널의 자속값을 합하여 총합값의 형태로 임계값과 함께 나타내었다. 최종적으로 임계값을 초과한 부분의 길이방향 및 원주방향 위치를 실제 손상과 비교함으로써 본 기법의 국부손상 검색 가능성을 살펴보았다.

• 한국산학기술학회논문지
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• 제20권10호
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• pp.125-132
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• 2019

수중폭발로 인해 발생된 충격파에 노출된 유체(대부분 해수)는 유체장 내 압력과 속력 등의 물리적 변화에 따른 장력을 견딜 수 없으므로 캐비테이션(기포 또는 기공)이 발생하게 되고 이때 발생된 캐비테이션은 수중폭발의 연쇄 과정 중 구조물에 미치는 충격하중의 전달 환경을 변화시킨다. 폭발물과 구조물 간의 거리가 비교적 가까워 선체구조의 국부적 손상에 관심을 가지는 근거리 수중폭발연구에서 관심을 가지는 물리적 현상은 크게 3가지로 초기충격파 그리고 그것과 선체구조와의 상호작용, 국부 캐비테이션, 국부 캐비테이션 폐쇄 후 2차 충격파이다. 본 논문의 관심은 근거리 수중폭발에 따른 국소 캐비테이션이므로 수면과 해저로부터의 반사파는 고려하지 않는다. 유체와 구조에 관한 각각의 지배 방정식을 유도하고 이를 간단한 1차원 무한평판 문제에 적용, 수치적으로 해석하여 엄밀해와 비교해봄으로써 제안된 비연성 해석방법을 검증한다. 비연성 해석방법은 유체-구조 결합 해석방법보다 계산상 효율이 높으며 간단함에도 불구하고 상대적으로 높은 수준의 정확도를 얻을 수 있다는 점에서 유용하다. 본 논문을 통해 수중폭발과 같은 복잡한 물리적 상황에서의 유체-구조 상호작용 현상에 대한 이해와 실질적인 문제에 개념적 이해를 높이는 데 도움이 될 것이다.

• 한국물환경학회지
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• 제35권6호
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• pp.497-509
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• 2019

After the Total Maximum Daily Loads(TMDLs) was applied, it became beyond the limit of concentration management. However, it does not adequately reflect the characteristics of various watersheds, and causes problems with local governments because of the standard flow set. Thus, in this study, the Han River system is organized into four groups in estimating the Pollution Contribution by applying the Flow Duration Curve(FDC) created by the daily flow of data from the HSPF. And the method of this study is expected to be valuable as basic data for the TMDLs. As a result, Group I contains the main watersheds with no large hydraulic structures and tributary watersheds. There is no specificity in the FDC and the Pollution Contribution is estimated as rainfall runoff. Group II contains watersheds near the city where the FDC is maintained above a certain level during the Low Flow Conditions and the Pollution Contribution is estimated as the discharge flow of large scale point pollution facilities. Group III contains the main watersheds in which the large hydraulic structures are installed and FDC is curved in the Low Flow Conditions. So the Pollution Contribution is estimated as the water quality of the large hydraulic structures. Group IV contains the upstream in mainstream watersheds in which the large hydraulic structures are installed and the FDC is disabled before the Low Flow Conditions. As the flow is concentrated in the High Flow Conditions, the non-point pollution sources are estimated as the Pollution Contribution.