충남대학교 학술림 산책로 훼손실태 및 관리방안에 관한 연구

이준우,김명준,최윤호,전용준,오도교,김민호,이소연,이경형 충남대학교 농업과학연구소 2004 농업과학연구 Vol.31 No.2

This study concentrates an the trail of the CNU(Chungnam National University) forest. The amount of use and the pattern of damage are considered, as well as the extent of environmental damage. Finally, some managerial strategies are proposed in connection with sustainable maintenance. The trail of the university forest is composed of three sections; one is the neighborhood park and the Institute of Information Technology/Communications, the second is the Institute of Information Technology/Communications and the Dormitory, and the third section is the Dormitory and the Foreign prof's Apt. The total length of the trail is 2.6km. The daily amount of use is 1,269 visitors per day. The amount of using increased three times the amount of that in 1998. This study shows the pattern of damage of the trail in the order of root-exposure, widening, rock-exposure, deepening and the divergence in the frequency of occurrence of all these factors. Environmental damage is also graded thus: grade 3 is 27.4m, grade 4 is 0.8m, grade 5 is 1.5m, and grade 6 is 0.2m. Accordingly, some managerial strategies were proposed in connection with the sustainable trail maintenance.

판상형 충전제의 함량과 배향에 따른 PP복합체의 열팽창계수 영향 연구

이기윤(Kee Yoon Lee),이용현(Yong Hyun Lee),정선경(Sun Kyoung Jeoung),황효연(Hyo Yeon Hwang),이승구(Seung Goo Lee) 한국고분자학회 2012 폴리머 Vol.36 No.3

두 가지의 종횡비(ρα=a1/a3 and ρβ=a1/a2)에 의해 특징지어진 3차원 타원체(a1 > a2 > a3)를 사용하여 polypropylene 복합체의 판상형 충전제 함량과 방향이 열팽창률에 미치는 영향에 대해 실험적인 연구를 수행하였다. 측정된 실험적인 값은 Lee와 그의 연구자들이 제안한 이론적인 모델에 의한 계산 값과 비교분석되었다. 판상형충전제로는 운모와 탈크가 사용되었다. 실험 결과로 운모의 경우 종횡비는 ρα= 13.5, ρβ= 1.8이 사용되 어, 20 wt% 함량일때 α11/αm는 약 0.56으로 감소하였으나, α33/αm는 오히려 1.018로 증가함을 보였다. 탈크의 경우의 종횡비는 ρα=3.7, ρβ= 1.4이었고 α11/αm는 0.63으로 감소하였다. 결국 운모와 탈크 모두 그 함량증가에 따라 종단방향과 횡단방향에서 열팽창률은 감소하였으나 수직방향에서는 초기 낮은 충전제 함량에서는 오히려 증가하는 경향을 보였다. Experimental study was performed regarding the effects of disc-like filler orientation and contents on the coefficient of thermal expansion (CTE) of polypropylene composites using the three dimensional ellipsoids (a1 > a2 > a3) analyzed by two aspect ratios(ρα=a1/a3 and ρβ=a1/a2). Measured data were compared with the theoretical approaches proposed by Lee et al. Mica and talc were useed as disk-like fillers in the composites. As experimental results, α11/αm decreased down to ca. 0.56 with mica content of 20 wt% and the aspect ratios, ρα=13.5, ρβ=1.8. However, α33/αm increased to more than 1. In the case of talc, α11/αm decreased to ca. 0.63 with 20 wt% and ρα=3.7, ρβ=1.4. Finally, the longitudinal CTEs (α11) of polypropylene composites decreased as filler contents increased, but normal CTE (α33) increased in the low filler contents like the theory.

신규개발된 제초제 metamifop 현탁농축액제에 대한 급성독성평가

이동연,이상훈,백경진,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Metamifop, (R)-2-[4-[(6-chloro-2-benzoxazolyloxyphenoxy]-N-(2-fluorophenyl)-N-methyl propanamide, was newly developed by Dongbu Hannong Chemicals in Korea. In the present study we conducted acute oral toxicity and acute dermal toxicity test. The values of LD_(50) of metamifop was found to be over 5,000 mg/kg for ICR mice. On the other hand, metamifop showed no acute dermal toxicity to SD rats.

초등학생 감사에 대한 일 연구

이정희 ; 정경연 동의대학교 인문사회연구소 2011 인간과 문화 연구 Vol.18 No.-

본 연구는 최근 많은 주목을 받고 있는 긍정심리학의 한 분야인 감사에 대한 초등학생의 일반적 경향성을 알아보고자 하였다. 연구대상은 P시의 8개 초등학교 3,4,5,6학년 남학생 312명, 여학생 272명 총584명이었다. 결과는 다음과 같다. 첫째, 초등학생은 일상생활에서 주위 사람들로 부터 감사하다는 말을 88.3%이상 말하고, 82.2%이상으로 듣는 것으로 나타나 초등학생들은 일상생활에서 감사함을 자주 표현하는 것으로 드러났다. 또한 감사함을 느낄 때 ‘고맙다’라는 말을 하는 행위를 64.2%가 가장 많이 하는 것으로 나타났다. 둘째, 초등학생의 감사성향은 학년에 따라 차이가 없었지만 성별에 따라서는 차이가 있었다. 여학생의 감사성향이 남학생보다 높은 것으로 나타났다. 셋째, 평소 초등학생의 감사대상은 남학생은 엄마>아빠>형제>친구>할머니, 여학생은 엄마>아빠>형제>할머니>친구 순으로 나타났다. 평소 감사대상에 대한 감사이유는 남학생은 엄마는 밥해줘서, 아빠는 돈을 벌어 와서 감사하다는 이유가 가장 많았으며, 여학생은 엄마는 칭찬이나 인정을 해줘서 아빠는 돈을 벌어와서 감사하다는 이유가 가장 많아 감사이유에서도 남녀의 성차가 나타났다. 또한 지난 한 달간 감사대상으로 남학생과 여학생 모두 친구보다 아빠의 순위가 뒤여서 평소의 감사대상과 실제 생활에서의 감사대상이 차이가 있는 것으로 나타났다. 넷째, 감사성향과 교우관계, 학업정도, 건강상태, 감사하다는 말을 듣고 감사함을 말하기는 정적 상관으로 나타나 교우관계가 좋고, 건강상태가 양호하며, 평소 감사하다는 말을 듣고 감사함을 말하기를 자주 할수록 감사성향이 높은 것으로 나타났다. 결과를 바탕으로 초등학생의 긍정적인 사고와 적응을 위해 감사성향의 중요성을 논의하였다. This study aims at understanding the general tendency in elementary school students'gratitude, a branch of positive psychology that has drawn lots of the public attention recently. The target of this study is total 584 students in 8 schools in P city -- 312 male students and 272 female students ranging from the 3th to the 6th graders. The results are as follows. First, the elementary school students express their gratitude so often that more than 88.3% of them express their gratitude to others and 82.2% of them hear such words in their daily lives. Also, when they feel something grateful, the percentage of the most commonly used expression - "Thank you" - was 64.2%. Second, the variance in the tendency of their expressing gratitude to others is not dependant upon their grades but upon their genders. The tendency of expressing gratitude to others of the female students was proved to be higher than that of the male students. Third, the people to whom the elementary school students usually feel gratitude most frequently are, in case of male students, in the following order: mother> father> brothers or sisters> friends> grand parents; and, in case of the female students: mother>father>brothers or sisters>grand parents> friends. The reasons for the differences in their gratitude to them are that, in case of the male students, they thank their mothers for giving them meals, and, their fathers for making money; in case of the female students, they thank their mothers for giving them compliments or acknowledgements and, their fathers for making money, showing some differences according to gender. In addition, the investigation that had performed over the last month on the people to whom the elementary school students express their gratitude revealed that the order in expressing their gratitude according to frequency was mother > friend > father, showing that there were some differences between the people to whom they usually think they should express their gratitude and the people with whom they get along in the real circumstances. Fourth, The correlations among their tendencies of gratitude, peer relations, academic achievements, health, and their expressions upon hearing a word of gratefulness have been revealed to be static. Therefore, the importance of the tendencies of gratitude to others in terms of the positive psychology and the adaptation of elementary school students has been discussed.

경부외측종괴의 감별진단 및 접근에 대한 고찰

이경호,박현진,강지연,최희원,조용석,김경원,양수남 大韓顎顔面成形再建外科學會 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.6

Most neck masses of specific cause occur in rather predictable locations within typical age groups. This allows a systematic approach to developing a working diagnosis and a differential diagnosis and management plan for the patient presenting with a neck mass. Pathologic masses of the neck will be divided into the following segment: 1. Masses of nonspecific location. 2. Masses in the submandibular region, 3. Masses in the parotid region, 4. Masses in the median-paramedian region, 5. Masses in the lateral neck region. The lateral neck region is the area posterior to the hyolaryngotracheal conduit, below the posterior belly of the digastric muscle and tip of the parotid gland, and extends down to the clavicle. The contents of this region include the large vessels, nerves and greatest number of lymph nodes of the neck, and lymph node metastasis in this region is usually from a primary lesion at the base of the tongue or elsewhere in the oropharynx. Common lateral neck masses include branchial cleft cyst, carotid body tumor, neurogenic tumor, pan-neck infection, cystic hygroma, hemangioma, lipoma and lymphoma. Especially lymphosarcoma. Hodgkin's disease, cystic hygroma, hemangioma and branchial cleft cyst and more common and often manifest in the young patients. Many head and neck disease processes manifest as neck masses. These conditions are treated by surgical excision, except for some inflammatory masses, and often those also must be excised before a diagnosis can be made. We retrospectively reviewed 5-year experiences in the treatment of lateral neck masses at our department to define better clinical characteristics of the masses and the optimal diagnostic and therapeutic approaches to these rare diseases.

Carbosulfan의 피부자극성, 안점막 자극성 및 피부감작성등의 알러지성 효과에 관한 연구

이상훈,이동연,백경진,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Many studies have been published on the human health effects of carbosulfan toxicity. Carbosulfan used as an insecticide can produce an irritating and allergenic effect when acting on the skin. In this study, a sensitization test on albino guinea pigs and intradermal reactivity and occular irritation test on albino rabbits were carried out with carbosulfan. Signs of acute skin inflammation appeared along with the clinical symptom of chronic dermatosis caused by the solution irritating characteristics. Moreover, carbosulfan showed severe eye irritation with conjuctival redness and severe opacity on cornea. Preventive measures should involve workers' obligatory instructions on the noxious impact on human skin and strict observance of industrial safety rules.

재조합 종두바이러스를 이용한 간염B형 바이러스 표면항원의 발현

이연경,문애리,안병윤 德成女子大學校 1997 德成女大論文集 Vol.28 No.-

The hepatitis B virus (HBV) is a small, enveloped virus with a circular, double-stranded DNA genome. HBV causes active and chronic hepatitis worldwide, including Korea, and is considered to be a major factor for liver cirrhosis and hepatocellular carcinoma. In contrast to the wealth of knowledge on the gene structure and expressional regulation, immunological and pathological mechanisms for HBV-induced hepatocellular injury are not well known. In the present study, vaccinia virus which has been demonstrated to be a useful eukaryotic expression vector was used to clone the gene for HBV surface antigen, L(S+preS2+preS1). The recombinant vaccinia virus vector, pMJ-L, which contains L surface antigen gene of adr-type HBV was constructed, and subsequently used for making recombinant vaccinia virus VV-HBV?. Expression of the HBV antigen was examined by indirect immunofluorescent antibody(IFA) test using mouse monoclonal anti-hepatitis B surface antigen. HBsAg was detected in the recombinant virus indicating that the VV-HBV? expressed S antigen successfully. The HBV-vaccinia virus recombinant obtained in this study is currently being used for studying the immunological aspects of HBV infection.

학습부진아동의 열등감 감소를 위한 집단미술치료의 효과 분석

이진숙,정경연 釜山大學校 敎育硏究所 2006 敎育硏究 Vol.16 No.1

중학교 도덕과 인물 학습의 내용과 특징 : 한국전통사상(한국학)의 관점에서

이경무,송세연 서원대학교 교육연구소 1999 敎育發展 Vol.18 No.2

Korean traditional Moral-Education discord with mordern School-Education discord with mordern School-Education System till now. This discordance has been disturbed the establishment of the identity of Moral-Education at Korean Middle and High School. And they weakend the subjectivity and self-consciousness of Moral-Education too. So there have been many reflections and efforts to improve the various problems in the Moral-Education. The principle of Characteristic Learning, in order to improve the Moral-Education of Middle School, was introduced by the 6th Curriculumm of Middle School Moral Subject. This paper investigate the contents and characteristics of Characteristic Learning of Moral Subject at Middle School in a view-point of Korean traditional thoughts. As the result of this research, it is noticed following that: 1) In order to obtain substance and to get realization of main contents and sub-subjects in every units. The Characteristic Learning propose to reform and to establish the moral custom by the imitation and good influences of Moral Characteristics. 2) In a view point of Korean tradition thoughts, the significence of Korean traditional through were reflected through the system of Moral Subject Education by the modelization of Korean Characteristics. 3) As far as the Characteristic Learning was introduced at the 6th curriculum, it might necessary to accomplish the purpose of the Characteristic Learning efficiently that Characteristic Learning should be supplied with some shortages.

Pyriminobac-methyl과 azimsulfuron 합제의 신규제형인 분산형 정제에 대한 독성 평가

백경진,이동연,이상훈,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Dispersible tablets disintegrate either to form a stabilized suspension rapidly in water, or to disperse instantaneously in the rice field without the aid of water. In this study, the newly formulated dispersible tablet form of herbicidal combination, pyriminobac-methyl and azimsulfuron, was evaluated the safety for human and animals in the toxicological viewpoints. The LD_(50) value of dispersible tablet form for pyriminobac-methyl and azimsulfuron was above 2,500 mg/kg for the oral route and above 2,000 mg/kg for the dermal route. It is considered to have low acute oral and dermal toxicity based on the findings of the present studies. In addition, the combination of pyriminobac-methyl and azimsulfuron showed mild skin irritant under the conditions of this study and conjunctival redness and slight opacity on cornea appeared from 1 hour after application.