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물리교육의 효율적인 교수-학습 지도 방안 : 빛 단원을 중심으로 learning methods of physics education
강현식,박승태,양동익 全北大學校 敎育大學院 1983 敎育論叢 Vol.3 No.-
Teaching physics education, various materials have been used. But many kinds of equipments are not sufficient and their operations are very complecate. On the other hand, it takes a lot of time for preparations. The physical experiments should decide the directions of lectures and motivate the learning students. The most remarkable discovery made by physical science is physical phenomena itself. The central problem in teaching physics today is to establish the principles of physics which consist of the basis of all physical phenomena. And the demonstration experiments are used frequently inside and outside the classrooms, and the operations of experiments are convinient to impulse of interests of students. In order to update the teaching and learning method of physics education effectively, we have studied“LIGHT”in high school's physics using improved method by the experiments though the analysis and investigation of the measuring results.
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임태호,임훈,이종호,강형구,장문준,조광현,장석준,김승호,정상원 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4
Background: This study was designed to analyze the current emergency department(ED) medical records of teaching hospitals in Korea. Methods: The five-item questionnaires were mailed to the EDs of 40 hospitals. Among them, 27 questionnaires and 35 ED medical records were returned for reply rates of 67.5% and 87.5%, respectively. Results: 1) The actual number of data elements in the ED medical records used by each hospital varies widely. It ranges from 1 to 15 data elements with an average of 7.5 data elements. 2) Thirteen data elements, signature of nurse, checklist style in review of systems, checklist style in physical examination, neurologic examination, figure of face, Glasgow coma scale, trauma scale, treatment plan, mode of transfer, condition on transfer, documents sent with patient, condition on discharge or discharge instruction, use of pediatric chart and vaccination history are used by less than 50% of the medical records examined. 3) There was no difference in the total number of data elements or in redesign and computerization of ED medical record based on the location of the hospital, the type of hospital administration, or the number of years since the start of EM residency program. 4) There was a statistically increased number of data elements in redesigned medical records. 5) In the survey, 89% of the residents replied that medical records needed to be redesigned. With respect to uniformity, 58% of the residents disagreed. A well-designed checklist chart rather than a descriptive chart was preferred by 89% of the residents. Conclusion: The currently used ED medical records have much room for improvement. The age of the ED had little impact on the quality of ED medical records. More attention and effort in this field are needed. In addition, The Korean Society of Emergency Medicine should provide guidelines for ED medical records.
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김현경,강석태,황정남,이철주,최대선,정병두 연세대학교 자연과학연구소 1984 學術論文集 Vol.13 No.-
이온 주입이 일함수 차이에 미치는 영향을 연구하기 위하여 낮은 에너지 이온 가속기, 전자총과 기타 일함수 차이를 측정하기 위한 장치를 설계, 제작하였다. 제작된 이온 가속기의 집속 특성은 이론적인 값과 일치하였다. 즉, 집속 렌즈의 확대율이 이론값은 2.0인데 비하여 1.2로 상당히 작은 값이었다. 또한 집속 렌즈의 전압 V_L과 추출 전압 V_e에 의한 집속 특성 역시 이론값과 매우 잘 일치하였다 . 제작된 장치를 사용하여 다결정 Cu와 Ni의 일함수 차이를 측정한 결과 0.45eV임을 알았다. 그리고 전자선을 이용하여 억제 전위차로 일함수를 측정할때 입사 전자의 반사율을 고려해야 함을 알았다. Low energy ion accelerator, electron gun, and apparatus for measuring work function difference are designed and constructed in order to study the effect of ion implantation on the work function. The focusing properties of accelerator is coincided with theoretical results; the magnification of Einzel lens is found to be 1.2, while theoretical value is 2.0, and the focal properties as a function of V_L/V_e are in good agreement with theory. Using these systems, the work function difference between polycrystalline Cu and Ni is found to be 0.45eV, and the experimental retarding potential plots indicate close agreement with the theoretical values modified by electron reflection.
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백영환,김현경,강석태,황정남,이철주,최대선,정병두 연세대학교 자연과학연구소 1985 學術論文集 Vol.15 No.-
낮은 에너지 가속기를 제작하여 순도가 99.99%인 다결정 Ni에 Li^+ 이온을 7 keV의 에너지로 각 시료에 대한 이온주입율이 1.3×10^16atoms/㎠, 4.0×10^15atoms/㎠, 2.0×10^15atoms/㎠, 1.0×10^15atoms/㎠, 2.0×10^14atoms/㎠ 가 되도록 주입시킨 후 전자총과 억제 전위차형 에너지 분석기를 이용하여 일함수의 변화를 측정하였다. 이온 주입율이 2×10^15atoms/㎠보다 작을 때는 일함수가 1.9 eV까지 감소하였고 이온주입율이 4.0×10^15atoms/㎠보다 많을 때는 일함수가 2.8 eV까지 증가하였다. 이것은 Topping의 이론 및 Bauer의 실험결과와 일치함을 보였다. The changes in the work function of polycrystalline Ni with a purity of 99.99% due to Li^+ ions implanted using a low energy ion accelerator and retarding potential energy analyser(RPEA) have been studied. The implantation energy of the Li^+ ions is 7 keV and the implanted ion dose for the various samples are 1.3×10^16 atoms/㎠, 4.0×10^15 atoms/㎠, 2.0×10^15 atoms/㎠, 1.0×10^15 atoms/㎠ and 2.0×10^14 atoms/㎠. When the ion dose is less than 2×10^15 atoms/㎠ the, work function decreases to 1.9 eV, but when the ion dose is more than 4×10^15 atoms/㎠, the work function increses to 2.8 eV. These results are in good agreement with Topping's theory and Bauer's experiment.
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이상주,이영모,이한규,최대은,박기현,이강욱,신영태 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2
Autosomal dominant polycystic kidney disease(ADPKD) is one of most common hereditary disorder. It is potentially fatal and the major mobilities are hypertension and renal failure. To elucidate clinical characteristics and outcomes of ADPKD, 67 ADPKD patients were analyzed retrospectively. The male to female ratio was 48 years for males and 42 years for females. The factors leading to the dignosis of ADPKD were flank or abdominal pain (46%), palpable abdominal mass (24%), incidental findings (18%), gross hematuria and headache. Urinalysis result showed hematuria (31%), proteinuria (19%), pyuria (18%). Among renal complications hypertension (67%) was the most common. Other complications were urolithiasis (16%) upper urinary tract infection (9%), cyst infection (7%). Azotemia was observed in 24% of cases. Echocardiography showed left ventricular hypertrophy in 24% and valvular regurgitation in 18% of cases, but there was no mital valve prolapse. Cerebrovascular events occurred in 6 cases (2 cases of intervertebral hemorrhage and 4 cases of cerebral infarction). Hipatic cyst were observed in 64% of cases. Eighteen cases culminated in end stage renal failure (ESRF) at an of 47. According to this study, the most common complications of ADPKD was hypertension (67%), ESRF (27%), and cerebrovascular event (9%). Hypertension was more frequently observed in increased creatinine group than normal.
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( Hyun Ji Kang ),( Tai Kyung Noh ),( Hye Rim Moon ),( Ji Su Yu ),( Sung Eun Chang ),( Ik Jun Moon ),( Sun Young Choi ),( Won Jong Oh ),( Chong Hyun Won ),( Beom Joon Kim ),( Yang Won Lee ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2
Background: A six-month study using the novel hyaluronic acid (HA) filler, PP-501-B, presented improvement of nasolabial fold (NLF) with increased tolerability. Objectives: This study aims to report the long-term efficacy, durability, and safety of a highly more concentrated HA filler, PP-501-B, in the correction of NLFs. Methods: Subjects completing the initial 6-month study were enrolled in this 24-month extension, randomized, multicenter, patient/evaluator-blind, split-face study. The injection areas and treatment procedures were identical to the one used in the previous study - each subject was injected with PP-501-B in one NLF, and Restylane Perlane (Q-med) on the contralateral NLF. All participants were reassessed for wrinkle improvement (using 5-point Wrinkle Severity Rating Scale, WSRS) and changes in Global Aesthetic Improvement Scale (GAIS) at 12, 18, and 24 months after their initial treatment. Results: The study enrolled 81 patients; 72 completed the study. In both groups, the WSRS score significantly decreased from baseline throughout the follow-up period after the retreatment. There was no significant difference in the WSRS scores between the two groups at 24 month. Both fillers were well tolerated with neither severe complication nor adverse reactions. Conclusion: The new HA filler, PP-501-B, is safe and effective in the long-term usage of correcting moderate to severe nasolabial folds after a second treatment.
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Epidemiology and clinical patterns of melasma in Korean patients
( Hyun Ji Kang ),( Tai Kyung Noh ),( Bo Young Chung ),( Mi Hye Lee ),( Chong Hyun Won ),( Mi Woo Lee ),( Jee Ho Choi ),( Sung Eun Chang ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2
Background: Melasma is a common acquired hyperpigmentary disorder that predominantly affects face. It frequently occurs among women with darker skin types and impacts quality of life. Objectives: To characterize the clinicoepidemiological features and the precipitating or aggravating factors of melasma in Korean patients. Methods: Present cross-sectional, multicenter study conducted in dermatological clinics of five tertiary hospitals in Korea. Four hundred and eleven patients with melasma completed a questionnaire concerning the clinical features and factors associated to their melasma, from January 2011 to August 2012. Results: Mean disease onset is 33.7【8.67. Most common triggering factor is sun exposure (68.4%) followed by pregnancy (27.0%) and emotional stress. Inflammatory status of face triggered and/or aggravated melasma in 61.1% of patients at least once. Dryness is the most common aggravating factor, followed by erythema/telangiectasia and itching/tingling. Concomitant pigmented disorders were post-inflammatory hyperpigmentation in 15.1%, followed by pigmented contact dermatitis including Riehl’s melanosis, and ABNOM. Conclusion: As it is well known that sun exposure and hormonal changes are most common cause of triggering the melasma, however, the inflammatory features may aggravate melasma in Asian patients. Therefore, these individual differences should be considered in the prevention as well as treatment of melasma.
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