Quadratic -functional inequalities

윤성식,이정례,서정필 한국수학교육학회 2016 純粹 및 應用數學 Vol.23 No.2

In this paper, we solve the quadratic -functional inequalities |f(x+y)+f(x-y)-2f(x)-2f(y)| <= (4 f(frac{x+y}{2}) + f(x-y)- 2f(x) - 2 f(y))| ---(0.1) where is a fixed complex number with | |<1, and |4 f(frac{x+y}{2}) + f(x-y)- 2 f(x) -2 f(y)| <| (f(x+y)+f(x-y)-2f(x)-2f(y))| --(0.2) where rho isfixed complex number with | |

감사의 게임이론적 분석

윤성식 한국회계학회 1990 會計學硏究 Vol.11 No.1

유산균 유전학 및 최근 연구 혁신: 프로바이오틱스와 면역

윤성식,박영서,최학종 한국유산균·프로바이오틱스학회 2013 Current Topic in Lactic Acid Bacteria and Probioti Vol.1 No.1

As for probiotics, that is generally defined as a live cell supplement which is able to bring health benefits to their hosts, even though the concept is still remains in controversy. Scientific works has given positive answers to the questions about if many LAB strains function as probiotic bacteria in human and animals. Currently, the interactions between human and LAB are actively investigated in human intestine. From a biodiversity perspective, this particular subject in human intestine is also extensively explored by a number of researchers worldwide. So far, it has been found that new strains and new genes were discovered in gut microbiota which is reported unique in individual. Complete analysis on gut microbiota is necessary in order to understand the possible beneficial roles of LAB in human intestinal track. When it comes to qualification, a probiotic strain is proved to be safe to consume and healthful to human after it is orally administered. On the other hand, LAB is present as a member of gut microbiota, plays an important role in innate immunity and acquired immunity. Their immune-modulation activity is occurred not only in intestine but also systemic in human body. It is generally accepted that immune function by LAB is not genus-specific but strain-specific. More recently, new mechanism accounting for interactions between host and LAB has been understood after a soluble factor from LAB was found to be directly associated with the epidermal growth factor receptor (EGFR) on intestinal epithelial cells. The soluble factor could be applied in the development of therapeutic agents. In conclusion, future research focus should be placed on the studies on the new LAB factors affecting human immune responses and its desirable effects because many different kinds of fermented foods representing kimchi have survived for a long time and those are popularly consumed in this country.

감사와 정부회계기준

윤성식 고려대학교 정부학연구소 2004 정부학연구 Vol.10 No.1

정부회계기준은 회계정보의 내용과 성격을 규정하므로 정보의 신뢰성을 결정하는 내부통제제도와 결합하여 회계정보를 생산하는 근본 틀의 역할을 수행한다. 최근 선진국에서 이루어진 행정개혁처럼 발생주의회계에 의해 성과를 평가할 수 있는 회계정보를 생산한다면 성과감사, 성과주의예산, 사업평가 모두 정부회계기준에 의해 영향 받지 않을 수 없다. 발생주의회계와 더불어 발생주의예산을 채택하는 것이 선진국의 추세이므로 멀지 않아 정부회계기준은 회계는 물론 예산에까지 영향을 미칠 것이다. 감사의 가치와 범위도 부분적으로 정부회계기준에 의해 결정되기 때문에 감사와 정부회계기준과의 관계는 종속변수와 독립변수의 관계에 있다. 이 논문은 감사와 정부회계기준의 관계를 이론적으로 조망하고 분석모델을 제공하며 정부회계기준과 내부통제제도, 정보시스템 등이 어떻게 유기적으로 상호작용하며 감사에 영향을 미치는가를 연구한다. Governmental accounting standards, prescribing the contents and features of accounting information, serves as a basic framework to yield accounting information, with internal control system which is a crucial element to promote the credibility of information. If one of the recent innovations of the public sector in advanced countries, accrual basis of accounting develops accounting information to assess performances, it is inevitable for governmental accounting standards to affect performance auditing, performance budgeting and program evaluation. In the aspect that adopting accrual basis of budgeting as well as accrual basis of accounting is one of the trends of public management in advanced countries, governmental accounting standards would make effects not only on accounting, but also on budgeting. Now that the value and the scope of auditing are determined partly by governmental accounting standards, the relationship between auditing and governmental accounting standards is that between dependent variable and independent variable. This paper presents a view over the relationship between auditing and governmental accounting standards theoretically, provides a model to analyze the relation and investigates how governmental accounting standards, internal control system and information system influence on auditing.

A comprehensive approach to flow-based seismic risk analysis of water transmission network

윤성식,Young-Joo Lee,정형조 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.73 No.3

Earthquakes are natural disasters that cause serious social disruptions and economic losses. In particular, they have a significant impact on critical lifeline infrastructure such as urban water transmission networks. Therefore, it is important to predict network performance and provide an alternative that minimizes the damage by considering the factors affecting lifeline structures. This paper proposes a probabilistic reliability approach for post-hazard flow analysis of a water transmission network according to earthquake magnitude, pipeline deterioration, and interdependency between pumping plants and 154 kV substations. The model is composed of the following three phases: (1) generation of input ground motion considering spatial correlation, (2) updating the revised nodal demands, and (3) calculation of available nodal demands. Accordingly, a computer code was developed to perform the hydraulic analysis and numerical modelling of water facilities. For numerical simulation, an actual water transmission network was considered and the epicenter was determined from historical earthquake data. To evaluate the network performance, flow-based performance indicators such as system serviceability, nodal serviceability, and mean normal status rate were introduced. The results from the proposed approach quantitatively show that the water network is significantly affected by not only the magnitude of the earthquake but the interdependency and pipeline deterioration.

전문대학 식품영양과의 실험실습 및 현장실습 운영실태에 관한 연구

윤성식,소명환,남궁석 한국식품영양학회 1989 韓國食品營養學會誌 Vol.2 No.1

This study was conducted to gather the baseline data on realities of experimental-practice and opinions toward spot-practice, and to examine how to cope with the problems raised at the Department of Food and Nutrition of Junior Technical College in Korea. Ouestionairs were gathered from 42 chairmans of the Department of Food and Nutrition and 140 present dieticians worked in Seoul, Bucheon and Seongnam area. The results are as follows, First, as a whole, each college had 2∼3 experimental laboratory (Lab), in which Cooking Science Lab, Chemistry Lab and Microbiology Lab were occured at higher frequency as Lab's name. Second, the numbers per experimental-practice class were more than 40 at most colleges. 85% of present dieticians have answered to feel too much numbers per the class during their college days, whereas professors' opinions toward the numbers per class were suitable at 20∼30 persons per class. Third, professors' opinion toward the adquate ratio of the theory subject classes to experimental subject classes was suitable at 60 : 40. Dieticians answered to take the theory subject classes partly or mostly on behalf of the experimental-practice classes. Fourth, the main reasons which inhibited normal experimental-practice class were the class for emphasis on examination, the shortage of experiment budget, the excess of class members, the shortage of experimental Lab. Also, this results showed same propensity to present dieticians' opinion toward the same question above. Fifth, among the experimental-practice subjects established at the Department of Food and Nutrition, Diet Therapy Lab was highest frequency class emphasized on theory followed by Nutrition Counselling Lab, Food Processing and Storage Lab, Food Hygiene Lab and Food Microbiology Lab in that order. Here, Basic Chemistry Lab, Biochemistry Lab, Food Microbiology Lab were pointed as subjects far from the present task of dieticians. Sixth, Department of Food and Nutrition, as a whole, has conferred with spot-practice arrangement. About 50% (all who want to join spot-practice) of second year students took part in spot-practice. In the other way, all colleges except for 2 colleges didn't give the credit for the spot-practice system. Seventh, according to the on analysis on spot-practice places, manufacturing company was at highest frequency followed by hospitals, elementary school having group feeding system in that order. Especially, 16.7% (5 colleges) of the total colleges sent the students to the research institute related to food industry for spot-practice experience. Eighth, Professors' opinions toward the spot-practice time and periord were preferable on summer vacation of second year and for 1∼2 weeks, respectively. On the contrary, 74 dieticians answered to the adquate period as for 4 weeks. Ninth, 86 dieticians of the total 140 answered to complete the spot-practice during their college days, which helps the present task of them. Lacks of spot-practice program, Lacks of comprehension of upper personnels and lacks of group feeding equipments ranks higher as difficulties in spot-practice management.

활천문학상 수상작 : 누군가 널 위해 기도하네

윤성식 기독교대한성결교회 활천사 2019 활천 Vol.788 No.7

궤환선형화 가능한 비선형 시스템의 입력제한을 고려한 동적 와인드엎 방지

윤성식,박종구,윤태웅 제어로봇시스템학회 2000 제어로봇시스템학회 국내학술대회 논문집 Vol.2000 No.10

Identification of Growth Stimulatory Compound in the Mixed Culture of Lactobacillus helveticus YM-1 and Streptococcus thermophilus CH-1 in Milk

윤성식,유주현,Yoon, Sung-Sik,Yu, Ju-Hyun Korean Society of Food Science and Technology 1986 한국식품과학회지 Vol.18 No.6

환원탈지유배지에서 자란 Lactobacillus helveticus YM-1의 cell-free filtrate로부터 Streptococcus thermophilus CH-1의 생육촉진을 확인한 결과 이 물질은 분자량이 5,000정도의 peptide로 나타난다. 이 peptide 중에는 aspartic acid, Iysine, proline, leucine, valine, alanine, glutamic acid등의 amino산이 비교적 풍부하였으며, 그중에서 glutamic acid 함량이 가장 높았다. 또 이 Peptide가 생육 촉진효과 나타내는데 가장 중요한 역할을 담당하는 것은 glutamic acid와 Phenylalanine으로 판단되었다. A compound stimulatory to the growth of S. thermophilus CH-1 was isolated from the cell-free filtrate of L. helveticus YM-1 in milk medium. The stimulant was identified as a peptide with a molecular weight of approximately 5000 and exhibited positive ninhydrin reaction. Some kinds of amino acids confirmed as aspartic acid, alanine, valine, glutamic acid, lysine, proline, leucine were rich in the stimulatory peptide hydrolysate. Among them, glutamic acid was most abundant. Judging from bioautographic results, glutamic acid and phenylalanine were expected to exert an important role for the stimulation.

지식정보사회의 문화산업정책

윤성식,박문석,이흥재,이원규,김휴종,김형석 고려대학교 정부학연구소 2004 정부학연구 Vol.10 No.2

In the 21st century, so called, the era of culture, Korea faced favorable chances to bolster cultural industries as the kernel of growth industries through utilizing the vantage of a front-runner in IT sector. In the age of intellect and information, it is cardinal not only to establish fresh paradigms of cultural policies beyond extant perspectives and considerations,but also to possess novel insights for analyzing fluctuating economic conditions from microscopic views as well asfrom macroscopic views. Besides, North-Eastern Asian cultural community consisting of Korea, China, Japan and other Asian countries would become a cornerstone to promote Korea as a "Global Major". To realize this vision, Korea is required to work out diverse strategies on the aspects of cultural contents, cultural technology, industrial cooperation with other countries, cultural administrations, cultural institutions and the investment on cultural sector for the "The Era of Culture". 21세기 문화의 시대에 한국은 정보통신강국이라는 장점을 활용하면 문화산업을 성장산업의 핵심으로 설정할 수 있는 절호의 기회를 맞게 되었다. 지식정보화시대에는 기존의 관점과 사고에서 벗어나 새로운 문화정책의 패러다임을 구축해야 하는데 지식정보화사회에서 경제환경의 변화현상을 미시적이고 거시적으로 분석할 수 있는 안목이 필요하다. 한․중․일 3국을 중심으로 한 동북아 문화공동체는 세계적 메이저(Global Major)로 한국이 성장하기 위한 중요한 기반이다. 이러한 비전의 실현을 위해 문화콘텐츠, 문화기술(Culture Technology), 해외문화산업협력, 문화행정과 제도, 문화산업투자분야에 정보화시대에 걸 맞는 전략이 필요하다.