• Journal of the Korean Solar Energy Society
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• v.38 no.3
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• pp.1-20
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• 2018

It is a very important and fundamental process to know accurately the intensity of the solar energy coming into the installed module considering the tilted angle. Europe and the US commonly use a program called PVsyst to convert the global horizontal irradiation to global irradiation on tilted plane. There are two types of models that PVsyst uses to convert to irradiation on tilted plane. In this paper, Perez model, which is a decomposition model and Perez model, which is a transposition model used in PVsyst, are applied based on global horizontal irradiation and global irradiation on tilted plane measured in a specific area. The comparison of the decomposition model shows the effect of the transpostion model on global irradiation on tilted plane conversion by comparing the ratio of the horizontal diffuse irradiation amount of the Watanabe model which are highly trusted in Asia and the Perez model. The comparison of transposition model confirm the error between the measured data and the calculated value which is applied Perez model to global horizontal irradiation decomposed by Perez model and Watanabe model. Based on the two comparisons, This paper propose a method to confirm the reliability of transposition model and reduce the error when PVsyst is used in Korea.

• Journal of Chest Surgery
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• v.20 no.1
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• pp.209-212
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• 1987

The authors report a case of double aortic arch associated with complete transposition of the great arteries. On 7th, Feb. 1985, Rastelli operation was performed for transposition using extracardiac valved conduit. Postoperative course was complicated by persistent right lower lobe atelectasis which resulted from tracheal compression by double aortic arch. On 20th, Mar. 1985, left arch was divided distal to the left subclavian artery followed by complete resolution of the atelectasis. To the best of our knowledge, this is the first case ever reported in Korea.

• Journal of Korean Neurosurgical Society
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• v.52 no.3
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• pp.240-242
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• 2012

The anterior choroidal artery has several kinds of variations. Among them, the transposition of anterior choroidal artery and posterior communicating artery origins has been extremely rare. We report a case with cerebral aneurysm arising from posterior communicating artery which origin was distal to the anterior choroidal artery and review the relevant literature.

• Journal of Chest Surgery
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• v.20 no.4
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• pp.786-792
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• 1987

Congenitally corrected transposition of the great arteries is a congenital cardiac anomaly with ventriculoarterial discordant connection and atrioventricular discordant connection. This report describes a 17 year old male patient who had congenitally corrected transposition of the great arteries associated with ventricular septal defect and patent ductus arteriosus, underwent patch closure of the ventricular septal defect and suture closure of patent ductus arteriosus, and was discharged on 9th day after surgery with good condition.

• Journal of Chest Surgery
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• v.23 no.4
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• pp.764-768
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• 1990

Congenitally corrected transposition of great arteries is a congenital cardiac anomaly with ventriculoarterial discordant connection and atrioventricular discordant connection. A 8-year-old girl had congenitally corrected transposition of the great arteries with ventricular septal defect and pulmonary valvular stenosis. By transaortic approach, ventricular septal defect was closed and pulmonary valvotomy was performed by transpulmonary approach. No heart block or aortic insufficiency developed postoperatively.

• Journal of Chest Surgery
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• v.18 no.4
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• pp.589-597
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• 1985

Congenitally corrected transposition of great arteries is a rare congenital heart anomaly. We experienced two case of corrected transposition of great arteries, one [S,L,L] and one [I, D,D] associated with patent foramen ovale, ventricular septal defect and pulmonary stenosis. The patent foramen ovales were closed directly under right atriotomy, the ventricular septal defects were closed with Dacron patch under morphological left ventriculotomy and the pulmonary valvular and subvalvular stenosis were corrected under pulmonary arteriotomy. The postoperatively course was uneventful in case I, the permanent pacemaker was implanted in case ll.

• Journal of Chest Surgery
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• v.14 no.2
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• pp.161-167
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• 1981

Mustard succeeded in the physiological correction of the circulation for transposition of the great arteries by redistribution of the pulmonary and systemic venous blood flow using pericardial baffle in the atrium. This procedure has become one of the most confirmative corrective operations for transposition. A six years old girl was performed mustard operation for complete transposition of the great arteries combined with hemodynamically insignificant ventricular septal defect in December 1979. The postoperative patient`s condition has been satisfactory and she is now enjoying a productive life.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.50 no.1
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• pp.1-5
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• 2001

In this paper, a new method for calculating the penalty factors of all generators including the slack bus is presented. A simple transposition of the angle reference, from the conventional slack bus to another bus where no generation exists, enables the derivation of the loss sensitivity of the slack bus. Penalty factors are obtained without any physical assumption through a simple substitution of the bus loss sensitivities. Penalty factors calculated by proposed method are not dependent on reference bus and can also be directly substituted into the general ELD equation for computing the optimal dispatch. Equations for loss sensitivities, Penalty factors and ELD are calculated simultaneously in normal power flow computation. A case study on a test system has proved the effectiveness of the proposed' angle reference transposition' method.

• East Asian mathematical journal
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• v.35 no.2
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• pp.259-275
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• 2019

The researches on the didactic transposition in mathematics education have been conducted almost for 35 years in Korea. Those studies have been quite usually interested in the extreme phenomena such as Topaze Effect, Meta-Cognitive Shift, etc. However, the understanding on the meaning and roles of contextualization and decontextualization in the theory of didactic transposition is needed theoretically in mathematics education and also practically in school mathematics. In particular, for the purpose of managing the efficient instruction on the class, the proper and plentiful role and application of the contextualization is very important in the aspect of the teacher as well as the learner respectively. By this reason, this study investigates the meaning and role of reflection based on the concept of contextualization.

• Journal of the korean academy of Pediatric Dentistry
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• v.26 no.1
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• pp.38-43
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• 1999

Tooth transposition is the phenomenon in which two teeth in the dental arch are exchanged. The tooth most frequently involved in transposition is the permanent maxillary canine, especially with the first premolar. The etiology of transposition is still an enigma. Interchange of tooth germs, migration during eruption, genetic factor, local pathologic factors may be suggested as possible etiologic factors. There are three main options for treatment, which are the extraction of one of the transposed teeth, the alignment in the transposed position, the orthodontic movement of the teeth to their correct positions. If complete transposition occurred especially in mandible, alignment of teeth in the transposed position followed by occlusal reduction and esthetic restoration is usually recommended. The presented two-case report will describe the maxillary canine to the first premolar and to lateral incisor transposition with associated peg lateralis and retained primary canines. Although alignment the transposed teeth in original position is ideal treatment, it companies many complication as root resorption, alveolar bone destruction, gingival deheisence, etc. Therefore the treatment procedures in these case was relative cost-benefit effective method to both clinician and patients.