• 대한임베디드공학회논문지
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• 제12권6호
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• pp.377-384
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• 2017

The scope of the matrix application is so broad that it can not be limited. A typical matrix application area in computer science is image processing. Particularly, radar scanning equipment implemented on a small embedded system requires real-time matrix transposition for image processing, and since its memory size is small, a general matrix transposition algorithm can not be applied. In this case, matrix transposition must be done in disk space, such as flash disk, using a limited memory buffer. In this paper, we analyze and improve a recently published flash disk-based matrix transposition algorithm named as asymmetric sub-matrix transposition algorithm. The performance analysis shows that the asymmetric sub-matrix transposition algorithm has lower performance than the conventional sub-matrix transposition algorithm, but the improved asymmetric sub-matrix transposition algorithm is superior to the sub-matrix transposition algorithm in 13 of the 16 experimental data.

• Archives of Reconstructive Microsurgery
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• 제17권1호
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• pp.36-41
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• 2008

Surgical treatment of compressive ulnar neuropathy at the elbow has been performed with a wide variety of techniques. Among these techniques, anterior submuscular transposition of the ulnar nerve has been regarded as the method of choice by many authors. It has many advantages including a low recurrence rate, scar-free vascular bed, and protection from repeated trauma to the nerve. However, anterior submuscular transposition is technically demanding and requires more extensive soft tissue dissection. On the other hand, anterior subfascial transposition is less invasive, requires a relatively shorter operation time than the submuscular technique, and also can be done safely even in patiensts with elbow arthritis. We evaluated the clinical results of anterior submuscular transposition compared with anterior subfascial transposition. Fifteen patients underwent anterior submuscular transposition and ten patients underwent anterior subfascial transposition of the ulnar nerve. The mean follow-up time was 15 months (range 10 to 38 months) in the anterior submuscular transposition group and 7 months (range 6 to 15 months) in the anterior subfascial transposition group. According to the outcome status determination algorithm devised by Mowlavi, 3 patients (20%) showed total relief, 10 patiensts (66.7%) improvement and 2 patients (13.3%) no changes in the anterior submuscular transposition group. In the anterior subfascial transposition group, 2 patients (20%) showed total relief, 7 patients (70%) improvement and 1 patient (10%) displayed no changes. Statistically there was no significant difference of the clinical results between the two surgical techniques. Therefore we would suggest anterior subfascial transposition of the ulnar nerve as a preferred method for treatment of cubital tunnel syndrome.

• 전기학회논문지
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• 제64권2호
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• pp.240-246
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• 2015

Length of most underground power cable in home is not so long. Therefore it is operated without transposition due to low unbalanced ratio. However, if cable length is long, line constant of each cable will be different. Different line constant can induce unbalanced voltage and current of sheath. Also it can induce several induced interference. This paper describes the effectiveness of transposition through sheath component analysis on transposition and untransposition of cable conductor. Especially sheath current and induced voltage are analyzed and compared in case of transposition and untransposition. EMTP is used for modeling and analysis.

• 대한치과교정학회지
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• 제41권5호
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• pp.371-378
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• 2011

Transposition is defined as a dental anomaly manifested by a positional interchange of 2 adjacent teeth within the same quadrant of the dental arch. Maxillary canine-first premolar [Mx4-3] transposition is the most frequent tooth transposition reported in the literature. In this case report, an orthodontic correction of a transposition of the maxillary left canine and first premolar with the help of palatally located mini-implant anchorage is described. Esthetic and occlusal evaluations suggested alignment of the transposed teeth to their correct anatomic positions in the dental arch. The clinical result at the end of the treatment was satisfactory. Alignment was obtained, and intercuspation was adequate. Nevertheless, the maxillary canine showed facial recession, probably because it was initially positioned buccally. Supporting tissue was examined after treatment and no alveolar bone damage was observed.

• Journal of Yeungnam Medical Science
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• 제38권3호
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• pp.219-224
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• 2021

Background: Omental transposition has been used to facilitate perineal wound healing in patients undergoing abdominoperineal resection (APR). However, there is no high-level evidence supporting the effectiveness of omental transposition in this regard. This study aimed to investigate the clinical efficacy of omental transposition in facilitating perineal wound healing after APR. Methods: In this systematic review, we systematically searched the PubMed/MEDLINE, Embase, Scopus, Cochrane Library, and Web of Science databases for literature regarding the topic of our study. Studies published since the inception of each database were considered for review. The outcomes of interest were the perineal wound healing rate at 1 and 3 months postoperatively, perineal wound infection rate, and perineal wound healing period. Results: Of the 1,923 studies identified, four articles representing 819 patients (omental transposition patients, n=295) were included in the final analysis. The wound healing rates at 1 and 3 months postoperatively in the omental transposition group (68.5% and 79.7%, respectively) did not significantly differ from those in the control group (57.4% and 78.7%, respectively) (p=0.759 and p=0.731, respectively). Perineal wound infection and chronic wound complication rates, including sinus, dehiscence, and fistula rates, also did not significantly differ between the omental transposition (8% and 7%, respectively) and control (11% and 7%, respectively) groups (p=0.221 and p=0.790, respectively). Conclusion: Our results suggest that omental transposition does not affect perineal wound healing in patients who undergo APR.

• 대한수학교육학회지:수학교육학연구
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• 제27권3호
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• pp.469-489
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• 2017

교사는 교수학적 변환의 핵심적인 주체이다. 교사가 교육과정과 교과서에서 제시된 수학적 지식을 수업에서 가르칠 지식으로 변환하는 과정에는 교사의 개인적 요인들뿐만 아니라 교실 안팎의 환경과 제약들이 지대한 영향을 미치게 된다. 따라서 교사의 교수학적 변환을 이해하기 위해서는 제도적, 사회적 요인들이 교수학적 변환 과정에 어떠한 영향을 미치고 있는지를 광범위하게 파악하고 분석할 필요가 있다. 교사의 교수학적 변환 과정에 영향을 미치는 요인들과 제약들을 분석하고 확인하는 것은 교사의 교수학적 변환을 심도 깊게 이해하고 교사의 수업 실행을 향상시킬 수 있는 중요한 기회를 제공한다. 이에 본 연구는 중등수학교사들의 반성적 저널을 활용하여 교사들의 교수학적 변환에 영향을 미치는 요인을 탐색함으로써 그들의 교수학적 변환에 대한 인식을 분석하였다. 연구 결과, 교사들의 교수학적 변환에 영향을 미치는 다섯 가지 요인들을 확인하였으며, 다섯 가지 요인들이 교수학적 변환에 영향을 미치는 정도는 교사들마다 다르게 나타났다. 연구 결과를 바탕으로 교사들의 교수학적 변환에 도움을 줄 수 있는 방안들을 논의하였다.

• 대한수학교육학회지:수학교육학연구
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• 제26권2호
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• pp.173-188
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• 2016

교수학적 변환 관련 국내 연구는 약 25년 동안, 국외 연구는 약 35년 동안 이루어졌다. 본 연구는 국내와 국외에서 이루어진 교수학적 변환 관련 연구의 동향을 살펴보고 과제를 제안하는 데에 목표를 두었다. 연구결과는 다음과 같다. 첫째, 국내 연구에서는 교수학적 변환 이론이 수학교과서와 수학수업을 심층적으로 이해하는 관점이자 방법이 된다는 것을 구체적인 사례를 통하여 입증하는 데에 치중해왔다. 그동안 파악한 사례를 메타적으로 분석하거나 새롭게 설계하여 적용한 사례를 기초로 교수학적 변환 이론의 발전에 기여하는 연구가 이루어질 필요가 있다. 둘째, 국내에서도 수학교육학 외부의 연구 중에는 극단적인 교수 현상을 추가로 확인하거나 메타적으로 교과의 내용을 분석하는 것까지 시도한 경우가 있었다. 이들 연구를 수학교육학 내부의 논의맥락에서 재해석하여 시사점을 도출할 필요가 있다. 셋째, 실재 또는 실재의 복합체로서 학교수학을 이해하고 기술하려는 연구가 이루어질 필요가 있다. 국외에서는 이와 관련하여 다양한 연구가 이루어졌으므로 이를 국내실정에 부합되는 형태로 수정하여 적용함으로써, 우리나라 고유의 실재 또는 실재의 복합체가 무엇인지를 파악하여 개선하는 연구가 이루어질 필요가 있다. 넷째, 국외 연구에서는 교수학적 변환 이론을 인류학, 기술문명 시대의 인간과 교육, 인간행동학, 인식론 등 다양한 학문분야의 주요 개념과 연결해왔다. 국내 연구에서도 연구대상을 확장하고 다양한 연결을 시도할 필요가 있다. 다섯째, 국내 연구에서 사용하는 교수학적 변환 관련 개념과 용어에 대한 이론적인 논의가 필요하다.

• Clinics in Shoulder and Elbow
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• 제1권1호
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• pp.100-108
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• 1998

Surgical treatment of cubital tunnel syndrome has been reported according to a wide variety of techniques since the end of the last century. Theses range from simple decompression to various forms of nerve transposition and medial epicondylectomy. However, we could find only few reports which compare the results between different types of operations. The treatment results of medial epicondylectomy and anterior subcutaneous transposition, were analysed retrospectively. From March 1984 to January 1996, a total of 110 patients had operations for cubital tunnel syndrome. Seventy four of them were followed-up for more than one year, and only they were included in this study. Anterior subcutaneous transposition was performed in 26 patients; and medial epicondylectomy in 48 patients. There were 52 males and 22 females, with an average age of 34 years (range, 13 to 75). The average follow-up period was 40 months (range, 12 to 132). Grading system by Gabel and Amadio were used for evaluation of the patients; pain, sensory and motor dysfunction were checked preoperatively and at last follow-up. In 26 patients of anterior subcutaneous transposition, 7 (27%) were graded as excellent, 11 (42%) good, 3 (12%) fair and 5 (19%) poor. In 48 patients of medial epicondylectomy, 16 (34%) were excellent, 27 (56%) good, 3 (6%) fair and 2 (4%) poor. Sixty nine percent were excellent or good in anterior subcutaneous transposition group, while ninty percent in medial epicondylectomy group. This difference was significant statistically (p<0.01 )., From our experiences, we suggest medial epicondylectomy for the treatment of cubital tunnel syndrome, rather than anterior subcutaneous transposition.

• 한국통신학회논문지
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• 제21권12호
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• pp.3256-3264
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• 1996

This paper presents an efficient VLSI architecture for transposing matris in high speed. In the case of transposing N*N matrix, N$^{2}$ numbers of transposition cells are configured as regular and spuare shaped structure, and pipeline structure for operating each transposition cell in paralle. Transposition cell consists of register and input data selector. The characteristic of this architecture is that the data to be transposed are divided into several bundles of bits, then processed serially. Using the serial transposition of divided input data, hardware complexity of transpositioncell can be reduced, and routing between adjacent transposition cells can be simple. the proposed architecture is designed and implemented with 0.5 .mu.m VLSI library. As a result, it shows stable operation in 200 MHz and less hardware complexity than conventional architectures.

• Journal of Chest Surgery
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• 제12권3호
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• pp.197-206
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• 1979

The most common abnormal relationship between the great arteries and ventricle is transposition of great arteries, among which complete D-transposition is a common and lethal malformation. Without appropriate treatment, the infant born with transposition of the great arteries rarely survives the first year of life. In contrast to the grim hopelessness of only a few years ago, modern aggressive palliative and corrective surgical interventions can provide such infants with considerable hope for adolescent and adult life. Up until this time, intraatrial baffle technique for re-direction of venous return, which was proposed by Mustard originally, has been successfully applied to infants and children in many foreign clinics with decreasing trend of the operative risk. In this report, we present one case of a 4 year-old girl having complete D-transposition of the great arteries with atrial septal defect, and reviewed the relevant literatures.