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探究學習過程 履行을 爲한 評價方法에 關한 硏究 : Focused on the unit of Biotic Community "생물의 군집"단원 중심으로
林貞煥 大邱敎育大學校 科學敎育硏究所 1980 과학·수학교육연구 Vol.5 No.-
In this study, the inquiry learning process in the elementary science learning, which the inquiry learning should be emphasized and not carried out in its own way, is analysized as one of the present problems. The causes of them were found in various conditions but among them, the factors that the present evaluation was not carried out well as a remarkable way were analysized considerably high. Therefore when the evaluation implement and method which can not be answered without a direct experience of Inquiry Learning process should be developed, the following evaluation ways were groped on the assumption that normal inquiry learning should be carried out: 1) The objectives of unit was analysized in its scope the unit evaluation percentage table and evaluation element table were made and then by those tables the rating scale and Evaluation items were made and used. 2) The evaluation items for the scientific thoughts were made and used. 3) The Performance test items were made and used. 4) Self evaluation items were made and used. When the evaluation is carried out with this implement by this method, a right inquiry learning process will be carried out at the classes in the school and it assumes me that inquiry ability, scientific attitude and its skill will be evaluated fully well.
복합재를 적용한 반사판 안테나 곡면 패널의 반사 특성 측정을 위한 새로운 방법
임정환,이재욱,이택경,정화영,유제우,이재민 한국전자파학회 2019 한국전자파학회논문지 Vol.30 No.11
It is essential to analyze the electrical characteristics of composite materials, such as Carbon Fiber Reinforced Polymer(CFRP), as their electromagnetic properties change according to the method of fabrication. However, the conventional method cannot be applied to paraboloid-shaped deployable reflector antenna panel. In this paper, we analyze the effect of errors generated by waveguide to coaxial adapter while measuring the reflection characteristics of a curved specimen. Using the proposed structure of the adapter, it is confirmed that the reflection characteristics of a curved specimen can be measured by compensating the effect of error that occurs at the interface between the curved surface and the vertical flange waveguide.
경추 척수병증 환자에 있어서 Phase-Contrast Cine MRI 평가의 임상적 유용성
임정환,송준혁,신규만,김성학,Lim, Jeong-Hwan,Song, Jun-Hyeok,Shin, Kyu-Man,Kim, Sung-Hak 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.12
Objective : The cerebrospinal fluid(CSF) pulsates within the craniospinal axis in response to rhythmic cerebral blood volume variation during the cardiac cycle. The aim of this study is to characterize the normal and abnormal CSF flow and its waveforms in the cervical spinal subarachnoid space. Methods : The magnetic resonance(MR) images were obtained with 1.5 T(GE Signa, GE Medical Systems, Milwaukee, USA) unit using the 2 dimensional cine PC(phase contrast) sequence with cardiac gating and gradient recalled echo imaging. This pulse sequence yielded 16 quantitative flow-encoded images per cardiac cycle. Sagittal and axial images of the cervical spinal CSF space were obtained, and target sites were analyzed for characteristic CSF flow (TR=50ms, TE=12.5-15ms). The region of interest(ROI) was 1mm 3 in volume. Twenty six persons were included in this study : 10 healthy volunteers and 16 patients with cervical myelopathy. The post-operative cine MR study were also done in five patients. Results : The normal CSF pulsation dynamics in the cervical spine showed discrete systolic and diastolic components. The CSF flow revealed a sine wave pattern, in which the systolic phase was shorter than the diastolic phase(ratio=2 : 3). The patient group revealed decreased amplitudes of the CSF flow and irregularly distored flow waves. The systolic phase was elongated in the ROI above the stenotic level, whereas the diastolic phase was lengthened below the level. In the postoperative images, the abnormal pattern and amplitude were found to be corrected. Conclusion : From these results, the authors believe that the CSF flow study provides valuable informations regarding the extent of cervical stenosis and may be useful for the surgical planning and post-operative evaluation.
自然科 敎育의 學習評價에 對한 硏究 : 形成評價를 中心으로 Centered on the Formative Evaluation
林貞煥 대구교육대학교 1975 論文集 Vol.11 No.-
Compared with the existing view of evaluation, its new concept has been broadened and diversified. The present evaluation emphasizes its administrative and functional aspect while the new one places emphasis on its guiding and researching aspect. The desirable types of the evaluation of the elementary science education are summarized in three: Diagnostic, Formative and Summative evaluation. The thing to be stressed most in the evaluation of the elementary science education may be the procedure of the formative evaluation. It is as follows: 1. The learning objectives of the unit are subdivided into the actual behavioral objectives. 2. The unit to be studied is analyzed and selected. 3. The components included in the unit are analysed and an analysed evaluation chart is made. 4. Evaluation questionnaire is made and finally the evaluation begins.
林貞煥 慶北大學校 1962 論文集 Vol.5 No.-
1. One hundred twelve twins which are 59 male pairs, 36 female pairs, 17 pairs of hetero sex were examined in Kyung pook province. 2, These twins were classed as 71 monozygotes (male 46 femal 25) and 41 Dizygotes (male 13 female 11 male-female 17). 3. Most twins are likely to be feeble headed children or weak minded children. (Monozyogtes has more possibility to be so.) 4. Comparing Monozygotes with Dizygotes, Mutual relationship of IQ as well as that of all character is close each other. 5. Only the height in physique has been influenced much more by the heredity than the situation of the posteriority. 6. The running and the brood jump in the physical ability have little influence of the situation of the posteriority. 7. The low mutual relationship of VQ, shows that character of twin brothers have much differences: there are many unfamiliar twins, while there are intimate twins.
임정환 대한영상의학회 1991 대한영상의학회지 Vol.27 No.6
This report is a retrospective study of 20 histologically proven malignant maxillary sinus cancer patients treated in the Dept. of Tumor clinic, Presbyterian Medical Center from Apr. 1982 to Aug. 1990. CT in an excellent imaging modality to asses accurately the extent of malignant maxillary carcinoma. The results were as follows: 1. The average age of the patients was 52.3 years old. 2. Histologically, the cancers were composed of epidermoid carcinoma, rhabdomyosarcoma, osteosarcoma, adenoidcystic carcinoma, adenocarcinoma and undifferentiated carcinoma. 3. All cases are advanced in instage. 4. CT findings of mixillary sinus cancer were soft tissue density filling the maxillary antrum, soft tissue dunsity beyond the antrum, low density within the mass, punctate or amorphous calcifications within the mass, antral expansion and irregular bony wall thickeness, maxillary bony wall destruction, lymphadenopathy and distant metastasis. 5. Destruction of surfaces of maxillary bony walls were seen in the nasal surface(20 cases), facial surface(16 cases), intratemporal surface(14 cases) and orbital surface(11 cases). 6. The superioty of CT 개 the conventional sinus radiologic imaging were evident in different are as of tumor evaluation of tumor invasion to the infratemporal fossa, posterior ethmoid sinus, orbital apex, nasopharynx, cribriform plate, sphenoid sinus and skull base. 7. The limitations of CT in evaluation of maxillary sinus was evident in woys, poor differentiation between pooled secretion within the obstructed sinuses and tumor, and determination of invasion of soft tissue structures.