전하소법으로 합성한 $(1-x)Pb(Fe_{1/2}Nb_{1/2})O_3-xPbTiO_3$의 구조와 유전성질에 대한 연구

홍영식,박휴범,김정,김건,김시중,Hong, Young-Sik,Park, Hyu-Bum,Kim, Jeong,Kim, Keon,Kim, Si-Joong 한국세라믹학회 1993 한국세라믹학회지 Vol.30 No.11

Pb(Fe1/2Nb1/2)O3 and (1-x)Pb(Fe1/2Nb1/2)O3-xPbTiO3 ceramics were prepared by the precalcination method. Their structural and dielectric properties were investigated. The amount of perovsikte phase was increased by the precalcination and the dielectric properties of ceramics were improved. Additions of PbTiO3 were found to increase the tetragonality (c/a) of crystal lattice and Tc. In the middle region of (1-x)Pb(Fe1/2Nb1/2)O3-xPbTiO3, duffuse phase transitions (DPT) were observed.

$Na^+/La^{3+}$이온으로 치환된$Pb(Mg_{1}{3}Nb_{2}{3})O_3$의 구조 변화 및 유전 성질

홍영식,박휴범,안태호,김시중,Hong, Young-Sik,Park, Hyu-Bum,Ahn, Tae-Ho,Kim, Si-Joong 대한화학회 1996 대한화학회지 Vol.40 No.9

The structural changes and dielectric properties of Pb1-x(Na1/2La1/2)x(Mg1/3Nb2/3)O3 compounds substituted by 0∼50 mol.% of Na+/La3+ mixed ions were investigated by X-ray diffraction method, IR and Raman spectroscopy, and LCR meter. The amount of perovskite phase increased with the increases of Na+/La3+ substituents and sintering temperatures. Although the superlattice lines due to 1:1 ordering were not detected by X-ray diffraction method, it was found, from the Raman spectroscopy and the increase of diffuseness coefficient, that the ordering behavior was related to the decrease of A site ion size. Dielectric properties in Pb1-x(Na1/2La1/2)x(Mg1/3Nb2/3)O3 were affected by the amount of perovskite phase, grain size, and density. The phase transitions were broadened and phase transition temperatures were lowered by the increase of Na+/La3+ ions.

국민통합과 사회통합 Text 분석

홍영식 ( Young-sik Hong ),노승용 ( Seungyong Rho ) 가톨릭대학교 정부혁신생산성연구소 2018 정부와 정책 Vol.10 No.2

이 연구는 정부의 국민통합 기능 강화를 위해 근거에 기반한 객관적 논의와 실천가능한 다양한 대안 마련과 추진이 필요하다는 인식하에, 신문기사에서 국민통합과 사회통합이라는 용어가 어떻게 활용되고 있는지를 분석하였다. 분석 결과에 따르면, 국민통합과 사회통합을 사전적으로 정의하는 것보다는 현재 언론에서 이들을 어떻게 인식하고 있는지에 현상을 이해할 수 있다. 즉, 국민통합은 다소 정치적인 이슈로 이해되고 있고, 사회통합은 다양한 집단 간의 갈등과 이에 대한 해결을 모색하는 방향으로 전개되고 있는 것으로 평가된다. 현재 “국민통합” 및 “사회통합”영역에서 다양한 이슈가 존재하며 양자 간에 공통으로 논의되는 부분도 많지만, “사회통합”에서 다루고 있는 “통합이 필요한 영역”에 대한 논의가 더 많은 것은 사실이다. 대표적인 문제가 다문화 영역이다. This study analyzed how the terms of national integration and social integration are utilized in the newspaper articles, with the objective that it is necessary to establish objective arguments for the strengthening of the national integration function and to prepare and implement various practical alternatives. According to the results of the analysis, rather than prescribing national integration and social integration in a pragmatic way, it is possible to understand the phenomenon in how the media now perceives them. In other words, it is understood that national integration is a rather political issue, and that social integration is being developed in the direction of finding conflicts among various groups and solving them. There are various issues in the area of “national integration” and “social integration”, and there are many parts that are commonly discussed by both parties. However, it is true that there is more discussion about the “area where integration is needed” and a typical problem is multiculturalism.

마이크로 컴퓨터에 있어서 Sort/Merge package 개발에 따른 I/O 문제.

홍영식(Hong Young Sik) 한국정보과학회 1978 정보과학회논문지 Vol.5 No.2

When the list of data to be sorted is too large to fit into primary memory, the concerns of a sort/merge designer increase considerably. This paper describes the attendant considerations of floppy-disc I/O and CPU balance, blocking and buffer techniques, determination of the merge order in developing sort/merge system for the micro computer. The efficiency of the sort process must be measured in terms of the total amount of time required to read, sort and write all data elements.

특집논문 : 불교문화콘텐츠 개발 방향

홍영식 ( Young Sik Hong ) 동국대학교 전자불전문화콘텐츠연구소 2005 전자불전 Vol.7 No.-

Various kinds of digital contents about Buddhist art, music, and literature have been developed and demands on these digital contents are increased rapidly. Also, DMB (Digital Multimedia Broadcasting) and WiBro (Portable Internet Services) are becoming commercialized. Advances in technologies about the wireless digital communication change platforms for exchanging digital contents and enable users to connect to the potable high speed internet. End users can enjoy various kinds of contents. In this paper, we review the current status of development of contents about Buddhist culture and platforms for distributing digital contents in Korea. Also, we describe the digital contents management systems for protecting copy rights of digital contents about Buddhist culture and propose directions for developing digital contents about Buddhist culture in consideration of these environmental changes.

K항공사 기내서비스 중요도에 대한 노선별 비교분석 연구

홍영식 ( Young Sik Hong ),김세규 ( Sae Kyu Kim ) 한국항공경영학회 2011 한국항공경영학회 추계학술대회 Vol.2011 No.-

The ongoing development of in-flight services is an integral part of an airline`s success. This study has conducted a survey on 315 cabin crew on the importance of service contents in different flight routes for the enhancement of airline service quality. Based on the result of the survey, First, it was confirmed that among the contents of in-flight service, the importance of individual service factors which comprise physical and human service are different in each flight routes. Second, there were disparities in the importance of each physical service factors in different flight routes, except in-flight entertainment. Finally the analysis on the characteristics of in-flight service in each different flight routes by way of detailed analysis centered on services such as provision of information, emotional response, service manner, service ability, and customized service showed that there were disparities of importance in flight routes in the fields of information provision, emotional response, and customized service, except service manner and service ability which can be said to be a basic qualification of a flight attendant.

영양 대사체학

홍영식(Young-Shick Hong) 한국식품영양과학회 2014 한국식품영양과학회지 Vol.43 No.2

대사체학이 질병, 약물, 스트레스, 식이, 생활습관, 유전적 차이, 장내 미생물 등에 의해서 발생하는 비정상적인 대사 메커니즘을 규명하고 관련 바이오 마커 발굴에 중요한 역할이 증명됨에 따라, 식품 영양학과 대사체학이 융합된 영양 대사체학의 역할이 더욱 중요해지고 있다. 특히 잘못된 식생활에 따른 미래의 질병 예측이 가능해지고 있어 향후 적절한 질병 예방이나 치료를 위한 적절한 식생활이나 식이에 대한 정보를 제공함으로써 건강 증진은 물론 개인별 맞춤식이나 맞춤약물 처방을 통한 개인 맞춤형 건강관리(personalized health care) 시대가 멀지 않았다. 또한 복잡한 식생활 패턴, 대사 반응에 대한 개인 간 차이 그리고 방대한 대사체 데이터와의 관계들을 효과적으로 밝혀낼 수 있는 기술에 대한 지속적인 개발과 영양 대사체학(nutritional metabolomics)이 유전체학(genomics or transcriptomics)과 단백체학(proteomics) 기술과 융합적으로 연구가 이루어질 때 질병과 식사 섭취 사이의 관계가 더욱 투명하게 규명될 것이다. Metabolomics is the study of changes in the metabolic status of an organism as a consequence of drug treatment, environmental influences, nutrition, lifestyle, genetic variations, toxic exposure, disease, stress, etc, through global or comprehensive identification and quantification of every single metabolite in a biological system. Since most chronic diseases have been demonstrated to be linked to nutrition, nutritional metabolomics has great potential for improving our understanding of the relationship between disease and nutritional status, nutrient, or diet intake by exploring the metabolic effects of a specific food challenge in a more global manner, and improving individual health. In particular, metabolite profiling of biofluids, such as blood, urine, or feces, together with multivariate statistical analysis provides an effective strategy for monitoring human metabolic responses to dietary interventions and lifestyle habits. Therefore, studies of nutritional metabolomics have recently been performed to investigate nutrition-related metabolic pathways and biomarkers, along with their interactions with several diseases, based on animal-, individual-, and population-based criteria with the goal of achieving personalized health care in the future. This article introduces analytical technologies and their application to determination of nutritional phenotypes and nutrition-related diseases in nutritional metabolomics.

특집논문 : 한국불교전서 전산화에 따른 누락문자처리와 활용방안

홍영식 ( Young Sik Hong ),이금석 ( Keum Suk Lee ),이용규 ( Young Kyu Lee ),한보광 ( Bo Kwang Han ) 동국대학교 전자불전문화콘텐츠연구소 2003 전자불전 Vol.5 No.-

It is necessary to employ the Unicode standard to represent Chinese characters in developing the web-based retrieval system for accessing ancient documents written in Chinese characters, such as the Hanguk Pulgyo Chonso, The missing character handling system announced by Electronic Buddhist Text Institute(EBTI) at Dongguk University in 1999, maintains the database of missing characters and corresponding font image files. In this paper, we present the improved missing character handling system which is integrated into the conventional word processor supporting the Unicode, such as MS word. By this approach, the efficiency of digitalization of the Hanguk Pulgyo Chonso or the Tripitaka Koreana, was improved.

多數의 프로세서를 가진 컴퓨터 시스템에 있어서 Priority Queue를 이용한 병행 스케쥬링 알고리즘

홍영식(Yong-Sik Hong),조유근(Yoo Kun Cho) 한국정보과학회 1985 정보과학회논문지 Vol.12 No.2

In this paper we propose a parallel priority queue in multiprocessing systems which consist of nonidentical processors We develop a parallel scheduling algorithm for non-preemptable tasks of unit length on in processors using parallel priority queues. The shared memory model for parallel computation is used. 본 논문에서는 각 프로세서의 속도가 각각 다른 다중프로세서에서 priority queue를 병행알고리즘으로 구현하고, 이것이 task 처리시간이 단위시간인 task 집합을 스케쥴하기위한 병행 알고리즘 작성에 효과적으로 사용될 수 있음을 보였다. 전제된 다중프로세서는 각 프로세서가 엑세스할 수 있는 공동 기억장치 (Shared memory)를 갖는 계산 모델이다.

프리엠프티브 스케쥬링을 위한 병행알고리즘

홍영식(Yong Sik Hong),조유근(Yookun cho) 한국정보과학회 1986 정보과학회논문지 Vol.13 No.2

주어진 n개의 task들이 각각 release 시간, deadline 및 처리시간을 갖는 경우에 이들 task들을 속도가 서로 다른 m개의 기계에 프리엠프티브(preemptive) 스케쥬링하는 동기식 병행 알고리즘이 제시되었다. 주어진 task 스케쥬링 문제를 flow 네트워크로 변환하고 효과적인 병행 최대 flow 알고리즘을 얻기 위해서 sorted리스트를 사용하였다. 이 알고리즘은 O(n²)의 프로세서를 사용하여 O(m²n³logn+n⁴logn) 시간에 수행된다. 또한 전제된 병행처리 시스템은 공동기억장치(Shared memory)를 갖는 시스템이다. Given n jobs, each of which has a release time, a deadline, and a processing requirement, a synchronized parallel algorithm for a preemptive schedule on m uniform machines is presented. The given scheduling problem IS transformed into the corresponding network flow problem. We used the sorted list to obtain an efficient parallel max-flow algorithm. This algorithm runs in O(m² n³ logn+n⁴ logn) time and uses O(n²) processing elements. The shared memory model of parallel computers is used.