진화재연설과 흔적기관에 대한 비판적 분석 활동 연구

최형은,조정일 全南大學校 師範大學 科學敎育硏究所 2007 科學敎育硏究誌 Vol.31 No.1

This study was purposed to find out whether or not college students could distinguish facts from opinions and they could think critically in order to make judgment and evaluation, given challenging arguments and evidence in relation to Haeckel’'s recapitulation theory and the vestigial organs. The subject were 79 students who majored in sciences at a college of education. They read reading materials and completed both a critical analysis table and a questionnaire about the activity itself. The responses were analyzed through the qualitative analysis. When students were asked to identify both the supporting evidence and the challenging evidence about the two theories, many of them did opinions as well as the facts for the evidence. The criteria students listed for evaluating supporting and challenging evidence were accuracy, objectivity, logic, and fact. Students were asked to evaluate the evidence on the ground of the definition of scientific method. The most frequent response in the case of supporting evidence was that the related observations could not be conducted, but only deducted from the theory, and therefore the evidence was not consistent with the definition of scientific method. However, in the case of challenging evidence, students responded that relatively observable evidence was provided; scientists tried to draw a conclusion from several investigations; the challenging evidence was more consistent with the scientific method. Among the general responses for the activities, over 80% students replied positively to items such as stimulating thought, understanding challenging evidence against evolution, the change of view on evolution, the possibility of application of this activity in classrooms as pre-teachers, the interest on the activities, understanding of scientific methods and the curiosity about the evidence. The results suggest that using challenging evidence, teachers could foster students’critical thinking ability, and that evolution theory and evidence could be an effective topic for this kind of activity.

日本 經濟成長의 원인과 문제점 考察

최형은,강미정,조미라,김정순,이언옥,정난주,정혜성 동일어문학회 1988 동일어문연구 Vol.3 No.-

보광 광원 종류에 따른 약광기 품종별 오이 접목묘의 생육과 묘소질 및 정식 후 초기 과실 수량

최형은,황소영,윤지혜,유진,황정훈,박은원,구정길,황희성,황승재 (사) 한국생물환경조절학회 2023 생물환경조절학회지 Vol.32 No.4

상품성 있는 오이를 수확하기 위해서는 고품질의 묘를 사용해야 한다. 약광기 온실에서 묘를 생산하는 것은 묘의 생육에필요한 광이 불충분하여 상품성이 저하될 수 있다. 이는 광질이 다른 인공광을 사용한 보광을 통해 약광 조건을 해결하여고품질의 묘를 생산할 수 있다. 본 연구는 약광기에 오이 접목묘의 생육과 묘소질에 적절한 보광 광원을 구명하고자 진행되었다. 오이는 ‘낙원성청장’, ‘신세대’, ‘굿모닝백다다기’ 3가지 품종을 접수로 사용하였다. ‘흑종’ 호박을 대목으로 사용하였다. 종자는 2023년 1월 26일 파종하였고, 2023년 2월 9일에접목하였다. 접목 활착 후 오이묘를 RB LED(red and blue LED, red:blue = 8:2), W LED(white LED, R:G:B = 5:3:2), 그리고 HPS를 광원으로 이용하여 처리하였다. 무처리구를대조구로 사용하였다. 보광은 일출 전 2시간, 일몰 후 2시간 동안 19일간 처리하였다. 경경과 지하부의 생체중과 지하부는보광 광원 처리별 유의적인 차이가 없었다. W LED에서 초장과 하배축장이 짧아졌다. 하지만, 엽장, 엽폭, 엽면적 그리고지상부의 생체중과 건물중은 RB LED에서 가장 높은 값을 나타냈다. 충실도, 순동화율, 그리고 작물생장률과 같은 묘소질은 RB LED와 W LED에서 증가하는 경향을 보였다. 정식 후, 대부분의 생장은 유의적인 차이가 없었지만, 초기 과실 수량은 전체적으로 대조구보다 실험구에서 많았고, RB LED와 W LED에서 과실 수량이 가장 많았다. 결론적으로 약광기 오이접목묘에 RB LED와 W LED를 보광 광원으로 사용하는 것은 묘의 생육, 묘소질, 그리고 초기 과실 수량을 증가시킬 수있다. To harvest marketable cucumbers, high quality seedlings must be used. Producing seedlings in the greenhouse during the low radiation period decreases marketability due to insufficient light for growth. Supplemental lighting with artificial light of different quality can be used to improve low light conditions and produce high quality seedlings. Therefore, this study was conducted to select the appropriate supplemental light sources on the growth and seedling quality of grafted cucumber seedlings during the low radiation period. Three cultivars of cucumber were used as scions for grafting; ‘NakWonSeongcheongjang’, ‘Sinsedae’, and ‘Goodmorning baekdadagi’. Figleaf gourd (Cucurbita ficifolia) ‘Heukjong’ was used as the rootstock. The seeds were sown on January 26, 2023, and grafted on February 9, 2023. After graft-taking, cucumbers in plug trays were treated with RB light-emitting diodes (LED, red and blue LED, red:blue = 8:2), W LED (white LED, R:G:B = 5:3:2), and HPS (high-pressure sodium lamp), respectively. Non-treatment was used as the control. Supplemental lighting was applied 2 hours before sunrise and 2 hours after sunset for 19 days. The stem diameter and fresh and dry weights of roots did not differ significantly by supplemental light sources. The plant height and hypocotyl length were decreased in W LED. However, the leaf length, leaf width, leaf area, and fresh and dry weights of shoots were the highest in the RB LED. Seedling qualities such as crop growth rate, net assimilation rate, and compactness were also increased in RB LED and W LED. After transplanting, most of the growth was not significant, but early yield of cucumber was higher in LED than non-treatment. In conclusion, using RB LED, W LED for supplemental light source during low radiation period in grafted cucumber seedlings improved growth, seedling quality, and early yield of cucumber. Additional key words: compactness, leaf area, light quality, net assimilation rate, plug seedling

발전기 고정자 지락보호 계전기 64S 오동작 원인분석 및 발전운전 운영방식 개선

최형일(Hyeongil Choi),김인대(Indae Lee),이용희(Yonghui Lee),박관창(Gwangchang Park) 대한전기학회 2018 대한전기학회 학술대회 논문집 Vol.2018 No.-

에폭시 - 페라이트 복합재료의 전파 흡수 특성

최형도(Hyung Do Choi),김왕섭(Wang Sup Kim),한기철(Ki Chul Han),김경용(Kyung Yong Kim),문탁진(Tak Jin Moon) 한국고분자학회 1995 폴리머 Vol.19 No.5

상하수도 `96 학술발표회 및 세미나 / Session (1) : 추계학적 방법을 이용한 물사용량의 분석 및 예측에 대한 연구

최형,이희영 대한상하수도학회 1996 학술발표회 및 세미나 Vol.1996 No.-

모션 스테레오의 기하 구조 ( Geometric Structure for Motion Stereo )

최형일,김계영 한국통신학회 1992 한국통신학회 워크샵 Vol.- No.-

장기배양(Organic Culture)을 이용한 건(Tendon) 치유에 관한 실험연구

최형도,박선화,김태연,정전은 고려대학교 의과대학 1990 고려대 의대 잡지 Vol.27 No.3

Repair of the severed flexor tendons within the digital sheath is often followed by the development of dense, unyielding adhesions between the site of repair and the surrounding tissues despite of the meticulous suture technique. The biological principles of flexor tendon healing has been known that tendons lack any intrinsic potential to repair themselves and that vascular adhesions from the surrounding tissues constitute an essential part of it. But recently, there have been many reports to reveal the intrinsic tendon cell capacity for repair and the efficacy of early passive exercise after tendon suture of severed one. The aim the investigation was to study the repair process of tendon specimens in an in vitro environment thus eliminating any possible influence to tendon itself. Digital flexor tendons from the forepaws of the New Zealand white rabbits, weighing 2-3kg, under ether anesthesia were sectioned. The healing process of the sectioned and subsequently sutured tendon segments was studied over a period of 6 weeks, using an organ culture technique. In light micuoscopic (Hematoxylin-Eosin stain & van Gieson stain) and transmission electron microscopic examination on 1,2,4 & 6 weeks after tendon repair, the following results were obtained. : 1. Tendon showed a definite intrinsic capacity for healing. 2. The epitenon cells exhibited proliferation and migration of active fibroblasts with collagen syntheses in the suture sites of severed tendons.

Successful Management of Immune-Mediated Hemolytic Anemia Secondary to Infection with Cytauxzoon felis and Feline Immunodeficiency Virus

최형일,김준영,한재익,김하정 한국임상수의학회 2020 한국임상수의학회지 Vol.37 No.4

Cytauxzoonosis is caused by Cytauxzoon felis (C. felis) in wild and domestic cats. However, cytauxzoonosis is uncommon in Asia. Additionally, clinical reports of C. felis infection along with associated complications are rare. A seven-year-old neutered male Maine Coon cat was presented with acute dyspnea and lethargy despite the absence of a history of overseas travel. Mild regenerative anemia and autoagglutination were detected in hematological investigations. The parasitic and viral PCR assays revealed infection with C. felis and feline immunodeficiency virus (FIV). Thoracic radiographs showed pleural effusion with secondary bacterial infection. Ultimately, a diagnosis of infection-induced secondary immune-mediated hemolytic anemia (IMHA) and pyothorax was established. The cat was treated with a combination of atovaquone, prednisolone, and cyclosporine over 6 months and the final treatment was completed 8 months after initiation of therapy. This is the first report of its kind demonstrating successful management of feline IMHA and fatal pyothorax induced by FIV and C. felis in South Korea.

住岩댐 水域의 水質環境에 관한 調査 硏究

崔炯一,鄭京勳 조선대학교 환경연구소 1993 環境公害硏究 Vol.10 No.-

In order to research the water quality of artificial BOSUNG river which is now constructing for multi-purpose dam and water source Chuam DAM and its branch we did in May 1991, Dec. 1991 and the result were as follows: 1. In everywhere pH was 6.6-7.6 and very similar to our general rivers and there is no evidence to change the pH 2. In the investigation DO was 7.4-9.7(May-Oct.) and it was lower than 8.7-12.2 ppm(Nov.-Dec.) 3. BOD was 0.30-2.70 so it was estimated good quality 4. The values of average T-N and T-P showed up 0.131㎎/l, 0.028㎎/l during May, 0.141㎎/l, 0.033㎎/l during June But the analyzed results showed Poor-middle stage below the Eutrophication standard value of RV.Vollenweider. 5. In order to control the water quality of Chuam Dam thoroughly, it needs to minimize the upper inflow pollutants through sewage treatment, farming wastewater treatment, composting, usage decrease of chemical fertilizers and agricultural medicines, and so on For this, it is necessary to assign the waterworks protection area and to establish the special counterplan and the whole responsibility concerning body for control constantly as soon as possible.