눈 비유 모형을 활용한 소집단 활동에서 나타나는 중학생들의 시스템 사고 탐색

황윤식 ( Yoon-sik Hwang ),한문현 ( Moonhyun Han ),김희백 ( Heui-baik Kim ) 韓國生物敎育學會 2016 생물교육 Vol.44 No.4

This study explored how an analogy model activity and teacher supports enhanced students` system thinking and their understanding of the seeing process. Fifty-three 8th grade students used analogy models to learn the structure of the eyes and the seeing process. This study identified three groups of distinct system thinking. Students in the first group focused only on a single sub-structural element of a visual system and did not connect this element to visual system processes. The second group connected the limited sub-structural elements to the processes within a visual system, and students` fragmented ideas led to an alternative conception of the seeing process. The final group explained how visual systems form and interpret images by elaboratively connecting the sub-structural elements to the processes. In addition, by providing concrete scaffolds, the teacher helped students overcome difficulties in their system thinking. This study discussed the implication for using the analogy models as a cognitive tool for facilitating students` system thinking in science classes.

시각 개념을 다루는 중학교 과학 교과서에서 시각자료의 시스템 사고 지원 가능성 탐색

황윤식 ( Yoon-sik Hwang ),김희백 ( Heui-baik Kim ) 한국생물교육학회 2017 생물교육 Vol.45 No.3

This study explored how middle school science textbooks facilitated system thinking while addressing visual concepts. This study investigated the system thinking revealed in the text of textbooks, the ontological category of inscriptions and a comparison of the information in the text and the inscriptions. The textbooks addressed visual concepts using three themes: ‘Structure of the eye and vision formation’, ‘Pupillary reflex and visual accommodation’ and ‘Myopia and hyperopia’. A high-level of system thinking was required to learn these visual concepts. Unmodified inscriptions are typically categorized as ‘structure’, but inscriptions can be modified through the addition of words and conventions or the use of multiple images to fit ‘process’. Theses inscriptions could enable to support the high-level system thinking revealed in the text. This study discussed the implication of using inscriptions in a textbook to support system thinking in science classes.

LQG/LTR 기법을 이용한 이송자벌레 변위의 정밀 제어

전윤한(Yoon-Han Jeon),황윤식(Yun-Sik Hwang),박흥석(Heung-Seok Park),김인수(In-Soo Kim) 한국생산제조학회 2015 한국생산제조학회지 Vol.24 No.4

In this study, the linear quadratic Guassian loop transfer recovery (LQG/LTR) control technique was combined with an integrator and applied to an inchworm having piezoelectric actuators for precise motion tracking. The piezoelectric actuator showed nonlinear response characteristics, including hysteresis, due to its ferroelectric characteristics and the residual displacement phenomenon. This paper proposes a feedback control scheme using the LQG/LTR controller with an integrator to improve the ability to track the response to complex input signals and to suppress the phenomenon of hysteresis and residual vibration. Experimental results show that the developed feedback control system for an inchworm can track the various motion contours quickly without residual vibration or overshoot.

젖소의 번식장애 및 비임신진단을 위한 Milk Progesterone 측정 EIA-kit의 이용에 관한 연구

정병현,이병한,강영선,김진영,남형영,이강열,황윤식,양광헌,정길생,Chung, Byung-hyun,Lee, Byeong-han,Kang, Young-sun,Kim, Jin-young,Nam, Hyoung-young,Lee, Kang-yeol,Hwang, Yoon-sik,Yang, Kwang-hun,Chung, Kil-saeng 대한수의학회 1995 大韓獸醫學會誌 Vol.35 No.1

This study was carried out to investigate the effect, range of practice, and propriety for diagnosis of early non-pregnancies and reproductive disorders by dairy cows' milk progesterone analysis used EIA-kit of home products. The results were summarized as follows : 1. During 2 to 6 months after artificial insemination, the results of milk progesterone measurement by Home-kit and Auto ELISA reader-kit with pregnant dairy cows(152 heads) certified by rectal palpation were revealed, in Home-kit, 145 heads(95.4%) of positive reaction, 7 heads(4.6%) of quasi-positive, and 0 heads(0%) of negative among 152 heads and, in Auto ELISA reader-kit, 152 heads(100%) of positive reaction among 152 heads. 2. During 19 to 22 days after artificial insemination, the results of milk progesterone measurement by Home-kit, and thereafrer during 50 to 90 days after that, the results of pregnant test by rectal palpation were summarized as follows : 147 heads(82.1%) among 179 heads of positive reaction by Home-kit and 5 heads(31.3%) among 16 heads of quasi-positive were revealed pregnant cows by rectal palpation, and 42 heads(100%) among 42 heads of negative were non-pregnant. 3. During 19 to 22 days after artificial insemination, the results of milk progesterone measurement by Auto ELISA reader-kit, and thereafrer during 50 to 90 days after that, the results of pregnant test by rectal palpation were summarized as follows : 146 heads(86.9%) among 168 heads of positive reaction by Auto ELISA reader-kit and 6 heads(28.6%) among 21 heads of quasi-positive were revealed pregnant cows by rectal palpation, and 48 heads (100%) among 48 heads of negative were non-pregnant. 4. For the accuracy of the rectal palpation, Home-kit and Auto ELISA reader-kit were used in the cows of ovarian diseases. The results were following : in the cows of reproductive disorders expected negative milk progesterone, the accuracies of rectal palpation were the same 75.5%(40 heads among 53 heads) by Home-kit and Auto ELISA reader-kit, and in the cows of reproductive disorders expected positive milk progesterone, the accuracies of rectal palpation were 82.6%(19 heads among 23 heads) and 91.3%(21 heads among 23 heads) by Home-kit and Auto ELISA reader-kit, respectively, and the general accuracies of rectal palpation were 77.6%(59 heads among 76 heads) and 80.3%(61 heads among 76 heads) by Home-kit and Auto ELISA reader-kit, respectively.

${\beta}-Galactosidase$ 생산 유산균 선별 및 특성 조사

이영기,최수산나,박용일,박찬선,윤병대,황윤식,김희식,Lee, Young-Ki,Choi, Susanna,Park, Young-Il,Park, Chan-Sun,Yoon, Byung-Dae,Hwang, Yun-Sik,Kim, Hee-Sik 한국미생물학회 2006 미생물학회지 Vol.42 No.3

[ ${\beta}-Galactosidase$ ] (lactase)를 생산하는 유산균을 선별하고 그들이 생산하는 ${\beta}-galactosidase$의 특성을 조사하였다. X-gal이 포함된 MRS배지에서 푸른색을 나타내는 약 100여개의 콜로니를 김치로부터 분리하였다. 그들 중 ET-1과 LA-12 두 균주를 최종 선별하였으며, 16S rDNa 염기서열 분석을 통해 각 각 Lactobacillus fermentum과 L. acidophilus와 상동성이 높은 Lactobacillus 속으로 동정되었다. 선별된 두 균주는 높은 ${\beta}-galactosidase$ activeity와 우수한 생존력을 나타내었으며, 이들이 생산하는 ${\beta}-galactosidase$의 최적 활성조건을 조사한 결과, 반응온도 $55^{\circ}C$에서 가장 높은 활성을 나타내었으며, 반응 pH의 경우 ET-1은 pH 5.5에서 최고 활성을 나타내었고, LA-12는 pH7.0에서 가장 높은 활성을 보였다. 선별 유산균 ET-1과 LA-12는 위액과 담즙산액에 대해 우수한 내성을 나타내었다. 두 개의 선별 균주는 인공위액에 3시간 배양 후 초기 생균수와 비교하여 생균수 변화가 거의 없었고, 담즙산액으로 사용한 0.3% oxgall에서 24시간 반응 후에도 1 log cycle 정도 감소된 $10^8CFU/ml$의 생균수를 유지하였다. 이러한 결과를 바탕으로 유산균 ET-1과 LA-12는 유제품 산업에 이용 가능성이 크다고 판단된다. This study was carried out to select the lactic acid bacteria producing ${\beta}-galactosidase$ (lactase) and investigate the properties of the ${\beta}-galactosidase$. About 100 strains of lactic acid bacteria showing blue colony on the MRS agar medium containing X-gal were isolated from several kinds of Kimchi. Among them, 2 strains were selected as potential ${\beta}-galactosidase$ producers. The selected strains, ET-1 and LA-12, were identified as Lactobacillus fermentum and L. acidophilus, respectively by the analysis of 16S rDNA sequences. They showed relatively high ${\beta}-galactosidase$ activity and cellular viability. Their ${\beta}-galactosidase$ showed the highest activity at $55^{\circ}C$. And the optimum pHs of the enzymes produced by ET-1 and LA-12 were pH 5.5 and pH 7.0, respectively. They were also highly resistant to artificial gastric juice and bile. Two selected strains showed little change of viable cell number for 3 hr incubation in artificial gastric juice, and maintained the viable cell number at $10^8CFU/ml$ for 24 hr in 0.3% oxgall after incubation for 2 hours in artificial gastric juice. Based on these results, ET-1 and LA-12 are expected to be applied in dairy industry.

PIV에 의한 선박 슬로싱 유독 측정해석

도덕희(Deog Hee Doh),조용범(Yong Beom Cho),편용범(Yong Beom Pyeon),백태실(Tae Sil Baek),권순홍(Soon Hong Kwon),이정한(Jeong Han Lee),황윤식(Yoon Sik Hwang),류민철(Min Cheol Ryu) 한국가시화정보학회 2007 한국가시화정보학회 학술발표대회 논문집 Vol.- No.-

'96企業會計基準 改正案에 대한 社會文化的 適合性의 評價

黃潤植 동국대학교 지역개발대학원 1996 開發論叢 Vol.5 No.-

情報經濟的 接近法과 人間情報處理 接近法의 統合에 관한 硏究

黃潤植 동국대학교 경주대학 1983 論文集 Vol.2 No.-

In accounting and information systems, an information economics (I/E) approach is to compare alternative information structures in terms of their net expected value. An I/E model is specified in terms of five sets which the important relationships among their elements are summarized in three functions: X=Set of relevant states-of-the-world Y=Set of message (information) about X. A=Set of possible actions. O=Set of outcomes (one outcome for each X, A pair). P=Set of payoffs (associated with each outcome). η=An information relation reating states and messages. α=A decision function (rule) such that α=α(Y, η). ω=A utility of preference function such that p=ω(0). ◁그림 삽입▷(원문을 참조하세요) Mathematically, this model may be represented as a series of functions: Y=η(X) A=α(Y) P=ω(A) A major limitation of most I/E formulations is the absence of explicit consideration of human information processing(HIP), behavioral variables, and behavioral relationships. A closer examination of this research reveals that an implicit, Baysian information-processing rule is assumed. However, few studies have investigated the specification error that may exist if other processing rules and behavioral variables are more representative in extant information system choice solutions. Three approaches to HIP have received sufficient attention in the accounting literature. These are the lens model, the probabilistic judgement (Baysian) approach, and the cognitive complexity/cognitive style approach. ◁그림 삽입▷(원문을 참조하세요) X_s=The portion of the environment about which the individual is concerned (the distal variable). r_ei=The relationship between X_e and Y_i (validity coefficient). Y_i=Cues which may be used to judge the current state or to predict some future states of X_e. r_si=The relationship between Y_i and X_s (utilization coefficient). X_s=The individual's judgement of the state(or prediction of some future state) of X_e. r_a=The relationship between X_e and X_s (response validity). Relationships existing on each side of the lens model have typically been described via linear multiple regression equations. ◁그림 삽입▷(원문을 참조하세요) Since the lens model is primarily a descriptive model, it may be deemed to be more representative of empirical information-(cue)-processing systems. Compared to I/E model, however, this model tends to be incomplete with respect to the decision rules use (α) and the ultimate payoff realized(ω). The two models differ sharply in their orientation. the I/E model is primarily normative, whereas the lens model is primarily desciptive. However, models which guide accounting research and practice rarely can completely ignore either of these dimensions. That is, normative models which lack some descriptive validity imply little for system design issues. Also, descriptive models which rely on principles that are not logically derived from goal premises are unlikely to remain in use. An integrated model, which HIP functions and behavioral factors are added to the typical I/E formulation and explicit decision rules and payoff considerations are added to the typical lens study, may be suggested as follows: ◁그림 삽입▷(원문을 삽입하세요) I/E and lens model may be integrated by the behavioral factors B, which affect ρ and α. Information processing system ρ may be specified as a maximum likelihood estimator of X, or, as Bayes's theorem dictates, in terms of a judgement process which produces posterior probabilities. Cognitive style, which refers to the style of B, concerns the decision rules and approaches or style in information processing preferred by different decision makers. Studies of cognitive style have divided decision approaches into two types of reasoning-heuristic and analytic. Since accounting information is intended for ex-post evaluations of decision and actions, the feedback factor is incorporated in the integrated approach. t=The time point of information processing and decision. X_e'ti-1=Results of privious actions. Y_i't-1=Performance feedback cues. Y_it-1=η(X_et-1) Y_i't-1=η(X_e't-1) X_st=ρ(Y_it-1, Y_i't-1)=ρ{η(X_et-1), η(X_e't-1)} A_t=α(X_st) P_t=ω(A_t)

韓國 會計制度의 文化的 關聯性

黃潤植 동국대학교 경주대학 1995 東國論集 Vol.14 No.-

Accounting practices evolve to suit the circumstances of a particular society at a particular time. However, Korea has adopted accounting systems from Western Countries. The usual 'decision usfulness' definitions, Behavioral Accounting Research, and Market-Based Accounting Research focus on the level of the individual. This paper focuses on the macro-social, cultural level which is different from those mainstream approaches to the issue of usefulness. Hofstede's research (1980, 1983) aimed at detecting the structural elements of culture revealed four underlying societal value dimensions labelled Individualism, Power Distance, Uncertainty Avoidance, and Masculinity. Gray(1988) proposed that the value systems or attitudes of accountants may be expected to be related to and derived from societal values. He related four accounting varables to Hofstede's dimensions : Professionalism, Uniformity, Conservatism and Secrecy. Based on Hofstede-Gray Model, accounting subculture of Korea represented by the preferences for Statutory Control as apposed to Professionalism, Uniformity, Conservatism, and Secerecy, which is derived from its cultural environments characterized by Collectivism, strong Power Distance, strong Uncertainty Avoidance, and Femininity society. Accounting subculture of Korea inferenced by the Hofstede-Gray framework is far different from that of Anglo-America, comparing that of Germany, France, and Japan. This paper examined cultural relevance of Korean accounting system and practices, exploring the relationships between Hofstede's cultural values, Gray's accounting values, and accounting system/practices in U.K., U.S., Germany, France, and Japan. Accounting system, concepts, or practices supposed to be relevant to Korean accounting subculture utilizing the Hofstede-Gray framework are as follows ; 1. Generally accepted accounting principles(GAAP) in Korea have been developed in the form of decrees and regulations of governmental agencies. 2. Korean GAAP contains many provisions derived from the Commercial Code, Income Tax Law, and Assets Revaluation Act. 3. Financial Accounting Standards(FAS) to be followed by all business enterprises emphasises the reliability, conservatism, and materiality as the characteristics of accounting information, but does not enumerate the relevnace directly. 4. Interperiod tax allocation, interest imputation, discontinued operations, and segmental reporting practices are not adopted or implemendted in Korea. Accounting system, concepts or practices supposed to be irrelevant to Korean accounting subculture are as follows ; 1. FAS in the form of decrees does not contain relatively detailed legal requirements, and the interpretation of some articles of it is in the vague. 2. FAS lists the consistency, but does not enumerate the comparability as the characteristics of accounting information. 3. Enforcing the preparation of Cash Flow Statement, capitalization of Interests, measuring on the basis of present value, and disclosing of the post Balance Sheet events which do not have the evidences of conditions existing at balance sheet date would have been adopted from U.S. practices without considering the cultural values of Korea. Cultural relevance of the practices for accounting changes, error corrections, installment sales, long-term contracts, assets revaluation, business consolidation, LiFo, and R & D are not easily assessed, since the practices are probably influenced by conflicted cultural values or noncultural, economic consequenses.

情報提供會計에 基礎를 둔 會計原則과 財務報告實務

黃潤植 東國大學校 嶺南地域發展硏究所 1999 地域發展硏究 Vol.5 No.1