• Reproductive and Developmental Biology
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• v.28 no.1
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• pp.45-52
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• 2004

To search a new porcine pheromonal odorants, this research for biostimulation and role of pheromone was augmented by means of "control system technologies" to offer a potentially useful and practical way to improve reproductive efficiency in livestock species. Therefore the 13 physicochemical parameters such as similarity indice (S), hydrophobicity (logP) and van der Waals molecule volume (MV) etc. of 54 steroid analogues, which are analogous of substrate molecules, 5$\alpha$-androst-16-en-3-one (P1) and 5$\alpha$-androst-16-en-3-ol (P2) of lipocalin as receptor of pig pheromones were calculated and discussed. The physicochemical properties of these steroid analogues were mainly followed by steric dissimilar of A and D ring in steroid nucleus. And we found that from correlation with S values and MV constants of molecules, the more MV constants are small, the more S values tend to approach 1. Based on this results, the S-values of 4-androsten-3,17-dione (P1-1) and 5 $\alpha$ -androstan-3-one (P2-1) were 1.0, respectively. The two compounds of them were chosen because they showed the same value each other at a side of hydrophobicity, molar refractivity and molecular volume. It is expected that the new two compounds will be able to substitute for P1 and P2, porcine pheromonal odorants.

• Korean Journal of School Psychology
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• v.16 no.1
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• pp.39-63
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• 2019

The purpose of this study was to explore how teachers perceive barriers to consultation with school counselors. For this purpose, the opinions of 16 teachers working in Seoul, Gyeonggi, Incheon, Chungcheong, and Daegu were collected through one-on-one interviews and qualitatively analyzed using the concept-mapping method. A second set of data was gathered to classify the similarity and importance of the teachers' statements through one-on-one interviews or the mail. The data was analyzed using multidimensional scaling and hierarchical cluster analyses. The results were as follows. The barriers to the consultation with school counselors as perceived by teachers were represented in 51 statements. Dimensional statement analysis revealed two dimensions: (a) 'School counseling's traits - School counselors' traits' and (b) 'Psychological difficulties - Environmental difficulties' Hierarchical cluster analysis identified 5 clusters: 'The responsibilities as homeroom teachers interfere with communication with counselors', 'Teachers lack of awareness of their ability to seek consultation with counselors', 'Teachers lack of trust in school counselors', 'Perceptions of the school counselors' role and lack of relevant experience with school counselors prevent teachers from seeking consultation', and 'School counselors are overworked due to the school counseling environment' The most important cluster was 'Teachers lack of trust in school counselors'.

• Korean Journal of Culture and Social Issue
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• v.20 no.4
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• pp.415-441
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• 2014

The purpose of this study was to examine the cultural characteristics of Korean interpersonal relationships. A total of 45 preliminary items were selected through book and literature review about the characteristics of the Korean or Korean society in study 1. The first survey data were collected from the Korean university students. Through the item analysis and Exploratory Factor Analysis(EFA), 4 factors composed of 32 items were extracted. Four factors were found: 'friendly attitude, harmony, jeong(interpersonal affection), keeping relationship', and using content analysis, 20 items were refined. Study 2 was conducted with the data collected from the Korea adults. As the result of carrying out EFA and Confirmatory Factor Analysis(CFA), the final 17 items were fixed as an affective relationships scale of the Korean. And CFA were implemented to evaluate discriminative validity. Finally, the implications and limitations of this study were discussed.

• Korean Journal of Food Science and Technology
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• v.48 no.4
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• pp.301-305
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• 2016

This study was conducted to investigate changes in pH, volatile basic nitrogen (VBN), thiobarbituric acid (TBA), $a^*$ (redness), shearing force, and microbial content (total plate count; TPC) in beef during freezing storage at -1, -5, and $-20^{\circ}C$ for 21 days. TPC as an effective quality indicator was used to identify the decay point by regression analysis. The pH, TBA values, and TPC significantly increased with storage at all tested temperatures (p<0.05). VBN significantly increased and shearing force significantly decreased with storage at -1 and $-5^{\circ}C$ (p<0.05). TPC showed significant correlation with temperature at $-1^{\circ}C\;(R^2=0.891)$, $-5^{\circ}C\;(R^2=0.856)$, and $-20^{\circ}C\;(R^2=0.444)$. The decay points at -1, -5, and $-20^{\circ}C$, were 27, 52, and 84 days, respectively. The results suggest that a freezing temperature of $-5^{\circ}C$ is effective for short-term storage of beef.

• The Transactions of the Korea Information Processing Society
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• v.5 no.7
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• pp.1923-1932
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• 1998

This paper deals with a 2-D objects recognition algorithm. And in this paper, we present an algorithm which can reduce the computation time in model retrieval by means of hashing technique instead of using the binary~tree method. In this paper, we treat an object boundary as a string of structural units and use an attributed string matching algorithm to compute similarity measure between two strings. We select from the privileged strings a privileged string wIth mmimal eccentricity. This privileged string is treated as the reference string. And thell we wllstructed hash table using the distance between privileged string and the reference string as a key value. Once the database of all model strings is built, the recognition proceeds by segmenting the scene into a polygonal approximation. The distance between privileged string extracted from the scene and the reference string is used for model hypothesis rerieval from the table. As a result of the computer simulation, the proposed method can recognize objects only computing, the distance 2-3tiems, while previous method should compute the distance 8-10 times for model retrieval.

• Journal of Life Science
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• v.13 no.6
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• pp.879-888
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• 2003

In order to measure the enzyme activity of 5-epi-aristolochene hydroxylase, one of cytochrome P450 (P450) enzymes in eicitor-treated pepper cell, we used in vivo assay method and demonstrated a dramatic suppression of the activity by P450-inhibitors, ancymidol and ketocornazole. Using RT-PCR method with degenerate primer of the well conserved domains found within most P450-enzymes, and using cDNA library screening method, one distinct cDNA, being designated P450Hy01, was successfully isolated from elicitor-treated pepper cells. P450Hy01 mRNA was all induced in elicitor-treated cells whereas never induced in control cells. Moreover, levels of P450Hy01 expression were highly correlated with the levels of extracellular capsidiol production by different elicitors in cell cultures. P450Hy01 transcript was also induced by several other elicitors such as, cellulase, arachidonic acid, jasmonic acid, yeast extract as well as UV stress. P450Hy01 sequence contained high probability amino acid matches to known Plant P450 genes and ORF with a conserved FxxGxRxCxG heme-binding domain. P450Hy01 cDNA showed 98% of homology in sequence of nucleotide as well as amino acid to 5-epi-aristolochene-1, 3-hydroxylase (5EAl, 3H) which has been isolated in tobacco cells, suggesting that P450Hy01 is prominent candidate gene for P450-enzyme encoding 5EAl, 3H in pepper cell.

• Journal of The Korean Association For Science Education
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• v.26 no.6
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• pp.703-722
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• 2006

The purpose of this study is to investigate the characteristics of abduction suggested by C. S. Peirce, and to discuss its implications in science education. Peirce's abduction is the logic of generating hypothesis. Abduction is a kind of logical inference, which colligates general rule and the observed result, and then it makes us judge the observed result as a case of the general rule on the basis of their resemblance. The process of abduction is also the logic of inquiry. In a Peirce's view, inquiry is a struggle for escaping from the condition of 'doubt' and to 'belief the nature of which is the establishment of habits. Because what habit an object has is its whole meaning, in his views, the fixation of belief is the way of attaining the truth related to it. The beliefs of individuals, however, are always fallible. So, to attain a truth, we need the terminal opinion of community of inquiry that could conduct infinite inquiry. These characteristics of Peirce's abduction give suggestions in science education as follows; firstly, hypothesis generating which transforms the condition of 'doubt' into the 'belief by considering practical effects should be highlighted, secondly, logical inference which makes us judge the observed result as a case of the general rule on the basis of resemblance should be highlighted, and thirdly, communities of inquiry which stand on the view of modest realism should be intended toward. These results could be expected in playing a role in critical discussion on science education relating to abduction.

• Journal of The Korean Association of Information Education
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• v.8 no.2
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• pp.251-259
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• 2004

Widespread internet service has brought many changes to modern life. Internet installed at school and intra-school computer network presented various education activities such as web-based instruction, immediate evaluation, and management of progress in studying. In this paper an essay question evaluation system for web service is studied for rapid measurement of accomplishment of student. This system provides evaluation of answers consisting a simple sentence and not demanding one word. If an essay question has exactly specified answer sheets and scoring criterion, this system give highly accurate scoring results, which shows nearly the same scoring of a teacher, needs very short time for evaluation, and represents real-time feed back result, so it is expected very high efficiency for the evaluation of an essay question.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10d
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• pp.571-575
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• 2006

통일에 대비한 남북한 인터넷 통합을 위한 준비작업으로서 통일 국가도메인 제정에 대한 논의가 계속되어 왔다. 분단상태의 남북한이 국가 도메인을 하나로 통합하여 공동으로 사용한다는 상징성이 크다는 점에서 남북한 모두가 동의할 수 있는 도메인을 제정하는 일은 중요하다. 통일 국가도메인에 대한 기존 제안들은 우리나라의 현 영문 국호인 'Korea'를 전제로 한 것들이었다. 논자는 일제 강점기 이전까지 우리 나라 영문 국호로 'Corea'가 사용되었다는 주장에 근거한 국호 영문표기 변경 논의가 남북 학술대회와 국회 결의안 등을 통해 공론화되어 많은 호응을 얻고 있음에 주목하였고, 남북한 국호의 영문표기 변경 논의와 연계하여 통일 국가도메인 제정을 추진하는 것이 시의적절하고 효율성도 높다고 판단하였다. 본 논문에서는 통일국가 도메인에 대한 기존 논의들을 검토하고 유사국가들의 국가도메인(ccTLD) 등록 사례를 통해 통일 국가도메인의 등록 가능성을 탐색한 후 통일 국가도메인명으로서 '.uc'(United Corea)를 최종 제안하였다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.24-24
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• 2022

제주는 면적에 비해 생물종다양성이 높은 지역으로 평가된다. 한반도 자생 관속식물은 4,500여종으로 이 중 50%에 달하는 2,200종이 제주에 분포하고 있으며 최근 30년간 80여종의 미기록 식물이 출현하였다. 이러한 특성은 선태식물과 산림버섯 분야에서도 유사하게 나타나는 것으로 지리적 위치, 기후적 조건, 한라산으로 인한 수직 식생 분포, 특이산림생태계로 인한 입지 환경의 다양성과 관련이 있다. 동시에 제주는 희귀 및 유용 산림생명자원의 보고이다. 제주에서 수집하여 종의 실체를 확인한 2,167종을 대상으로 희귀성과 유용성을 평가한 결과 제주고사리삼, 구상나무, 갯취 등의 희귀·특산 식물이 400종, 흑오미자, 제주백서향, 황칠나무 등의 유용식물이 781종에 달하였다. 또한 제주는 우리나라에서 기후변화에 가장 민감한 지역으로 동북아시아 기후변화의 요충지로 전망되고 있다. 한라산의 구상나무가 쇠퇴하는 등 이상 징후가 지속적으로 증가하고 있으며 동북아시아 아열대 최북한계지로서 한반도 생물지리의 징검다리 역할을 하기 때문이다. 따라서 나고야의정서 발효와 기후위기로 산림생명자원의 보존과 활용의 중요성이 더욱 강조되고 있는 현재의 시점에서 제주는 우선 연구 대상지라 해도 과언이 아니다. 이에 국립산림과학원 난대·아열대산림연구소는 절멸 위기에 처한 종의 보존과 유용 산림생명자원의 활용 기반 마련을 위해 수집 및 탐색-빅데이터 기반 구축-증식기술 개발-현지내·외보존원 조성 및 관리 기술 개발 등의 일련의 연구를 20년 이상 수행해 왔다. 여기에서는 제주지역 산림생명자원의 가치와 함께 보존과 활용 연구 성과를 소개하고 향후 연구 방향을 제안함으로써 산림 바이오 소재 산업화와 관련된 학계와 임업인 및 기업에 도움이 되고자 한다.