• Title, Summary, Keyword: revision

Search Result 2,320, Processing Time 0.041 seconds

Issues Concerning the Curriculum Revision Process and Mathematics Curriculum in Korea

  • Park, Kyungmee
    • Research in Mathematical Education
    • /
    • v.8 no.2
    • /
    • pp.95-106
    • /
    • 2004
  • The purpose of this paper is to diagnose the problems of the revision process of the curriculum, and identify the issues in relation to the 7th mathematics curriculum. From the review on the curriculum revision process in Korea, three issues were identified; timing and scale of curriculum revision, research and curriculum revision, and the relationship between the revision of the overall curriculum and that of a subject curriculum. Regarding the mathematics curriculum, the three issues were raised for further discussion; lack of philosophy behind the mathematics curriculum, optimization of mathematics educational content, and differentiated curricula for students of different abilities.

  • PDF

Outcomes of Revision Surgery Following Instrumented Posterolateral Fusion in Degenerative Lumbar Spinal Stenosis: A Comparative Analysis between Pseudarthrosis and Adjacent Segment Disease

  • Suh, Seung-Pyo;Jo, Young-Hoon;Jeong, Hae Won;Choi, Won Rak;Kang, Chang-Nam
    • Asian Spine Journal
    • /
    • v.11 no.3
    • /
    • pp.463-471
    • /
    • 2017
  • Study Design: Retrospective study. Purpose: We examined the clinical and radiological outcomes of patients who received revision surgery for pseudarthrosis or adjacent segment disease (ASD) following decompression and instrumented posterolateral fusion (PLF). Overview of Literature: At present, information regarding the outcomes of revision surgery for complications such as pseudarthrosis and ASD following instrumented PLF is limited. Methods: This study examined 60 patients who received PLF for degenerative lumbar spinal stenosis and subsequently developed pseudarthrosis or ASD leading to revision surgery. Subjects were divided into a group of 21 patients who received revision surgery for pseudarthrosis (Group P) and a group of 39 patients who received revision surgery for ASD (Group A). Clinical outcomes were evaluated using the visual analogue scales for back pain (VAS-BP) and leg pain (VAS-LP), the Korean Oswestry disability index (K-ODI), and each patient's subjective satisfaction. Radiological outcomes were evaluated from the extent of bone union, and complications in the two groups were compared. Results: VAS-LP at final follow-up was not statistically different between the two groups (p=0.353), although VAS-BP and K-ODI at final follow-up were significantly worse in Group P than in Group A (all p<0.05), and only 52% of the patients in Group P felt that their overall well-being had improved following revision surgery. Fusion rates after the first revision surgery were 71% (15/21) in Group P and 95% (37/39) in Group A (p=0.018). The rate of reoperation was significantly higher in Group P (29%) than in Group A (5%) (p=0.021) due to complications. Conclusions: Clinical and radiological outcomes were worse in patients who had received revision surgery for pseudarthrosis than in those who had revision surgery for ASD. Elderly patients should be carefully advised of the risks and benefits before planning revision surgery for pseudarthrosis.

Cause and Management of Patients With Failed Endonasal Dacryocystorhinostomy

  • Baek, Ji Sun;Jeong, Seong Hun;Lee, Jung Hye;Choi, Hye Sun;Kim, Sung Joo;Jang, Jae Woo
    • Clinical and Experimental Otorhinolaryngology
    • /
    • v.10 no.1
    • /
    • pp.85-90
    • /
    • 2017
  • Objectives. Endonasal dacryocystorhinostomy (DCR) is a well-established treatment method in patients with nasolacrimal duct obstruction. However, there are a few reports about the overall management of failed endonasal DCR. We investigated the causes and management strategies of failed endonasal DCR. Methods. This retrospective review included 61 patients (61 eyes) who had undergone revision surgery by the same surgeon after failed endonasal DCR between January 2008 and December 2012. The appropriate revision method was determined after analysis of the etiology of failure by the fluorescein dye disappearance test, nasal endoscopy, lacrimal irrigation, and probing. The criteria for success of the revision surgery were defined by the passage of fluid without resistance upon lacrimal irrigation and normalization of the tear meniscus height. Results. The mean duration between the primary endonasal DCR and revision surgery was 15.3 months. The average follow-up period after revision surgery was 12.2 months. The most common cause of endoscopic revision surgery was membranous obstruction. Endoscopic revision surgery was performed in 48 patients, while lacrimal silicone tube intubation under endoscopy was performed in 13 patients. The most common indication for lacrimal silicone tube intubation was functional epiphora. The overall success rate of the revision surgery was 89%. Conclusion. The most common cause of failed endonasal DCR was membranous obstruction. When patients with failed endonasal DCR presented at the clinic, it is important to identify the cause of the failure. Revision surgery could increase the final success rate of endonasal DCR.

Efficient and Low-Cost Metal Revision Techniques for Post Silicon Repair

  • Lee, Sungchul;Shin, Hyunchul
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • v.14 no.3
    • /
    • pp.322-330
    • /
    • 2014
  • New effective techniques to repair "small" design errors in integrated circuits are presented. As semiconductor chip complexity increases and the design period becomes tight, errors frequently remain in a fabricated chip making revisions required. Full mask revision significantly increases the cost and time-to-market. However, since many "small" errors can be repaired by modifying several connections among the circuit blocks and spare cells, errors can frequently be repaired by revising metal layers. Metal only revision takes significantly less time and involves less cost when compared to full mask revision, since mask revision costs multi-million dollars while metal revision costs tens of thousand dollars. In our research, new techniques are developed to further reduce the number of metal layers to be revised. Specifically, we partition the circuit blocks with higher error probabilities and extend the terminals of the signals crossing the partition boundaries to the preselected metal repair layers. Our partitioning and pin extension to repair layers can significantly improve the repairability by revising only the metal repair layers. Since pin extension may increase delay slightly, this method can be used for non-timing-critical parts of circuits. Experimental results by using academia and industrial circuits show that the revision of the two metal layers can repair many "small" errors at low-cost and with short revision time. On the average, when 11.64% of the spare cell area and 24.72% of the extended pins are added to the original circuits, 83.74% of the single errors (and 72.22% of the double errors) can be corrected by using two metal revision. We also suggest methods to use our repair techniques with normal commercial vender tools.

Monitoring Management Plan for Changed Region with respect to Revision Periods (변화지역에 대한 갱신주기별 모니터링 운영방안)

  • Han, You Kyung;Yeom, Jun Ho;Kim, Yong Il;Lee, Byoung Kil
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.31 no.5
    • /
    • pp.401-410
    • /
    • 2013
  • Due to the increasing need for spatial information, there have been a lot of research related with monitoring and revision of changed regions for the acquisition of the accurate and latest information. In this paper, the optimal monitoring management plan for changed regions with respect to the revision periods was proposed. For this purpose, the representative monitoring methods, which are based on database, professional manpower and crowdsourcing of continuous revision, and aerial imagery, satellite imagery and LiDAR of cyclic revision, were investigated. Then, the properties and application status of monitoring systems in Korea were illustrated according to the methods. Finally, the optimal monitoring management plan for continuous and cyclic revisions was suggested through the comparison of properties and revisionable objects of each method. From the result, it was shown to be appropriate for the optimal monitoring management plan of continuous revision as using Internet-Architectural Information System (e-AIS) database cooperated with professional manpower and crowdsourcing, and cyclic revision as using domestic high-resolution satellite images and LiDAR data processed semi-automatically.

Results of Arteriovenous Fistula Revision in the Forearm (상지에서 revision에 의한 동정맥루조성술의 결과)

  • 이선훈;김재욱;정재일;윤찬식;윤영철
    • The Korean Journal of Thoracic and Cardiovascular Surgery
    • /
    • v.33 no.11
    • /
    • pp.894-897
    • /
    • 2000
  • 배경: 의학의 발전으로 인하여 만성신부전 환자의 생존율이 향상되고 2차적인 동정맥루술을 시행하여야 하는 경우가 증가하였다. 이 논문은 2차적인 동정맥루 조성술의 하나인 Revision이 다른 방법과 마찬가지의 성공률 및 개존율을 나타내는가를 알고자 작성하였다. 대상 및 방법: 1995년 1월부터 1998년 9월까지 총 365례의 동정맥루술을 시행하였으며 이중revision하여 동정맥루를 만든 62명의 환자를 대상으로 그 결과를 관찰하였다. 결과: Revision한 62명의 6개월 개존율이 78.8%, 12개월 개존율이 72%, 24개월 개존율이 63%, 36개월 개존율이 56.9%이었다. 결론: Revision에 의한 수술방법은 2차적 재수술시 우선적으로 고려해보아야할 수술방법이다.

  • PDF

A Study on the Factors of the Engine driver′s Belief Revision (철도기관사의 신념수정에 영향을 미치는 요인에 관한 연구)

  • 김충수;김정평;안준용
    • Journal of the Korean Society for Railway
    • /
    • v.5 no.4
    • /
    • pp.209-214
    • /
    • 2002
  • Belief revision involves integrating new information with the current belief. It is a ubiquitous human activity. A critical feature of belief revision lies in its sequential nature. Railroad system can be described as organic. Engine drivers take a great role in this system. Recently, Hogarth and Einhorn(1992) have posited a belief-adjustment model for updating beliefs. Based on a sequential anchoring and adjustment strategy, the model is important for decision makers. The sequential nature of information processing is affected by some task variables. The purpose of this study is to examin factors which influnce on the Enginr Driver's belief revision process. The factors are the order, experience and task. The difference of belief revision is due to the order and experience level.

Common Sites, Etiology, and Solutions of Persistent Septal Deviation in Revision Septoplasty

  • Jin, Hong Ryul;Kim, Dae Woo;Jung, Hahn Jin
    • Clinical and Experimental Otorhinolaryngology
    • /
    • v.11 no.4
    • /
    • pp.288-292
    • /
    • 2018
  • Objectives. To investigate the common causes of persistent septal deviation in revision septoplasty and to report the surgical techniques and results to correct them. Methods. A total of 100 consecutive patients (86 males) who had revision septoplasty due to persistent septal deviation from 2008 and 2014 were included in the study. Their mean age was 35.6 years and the mean follow-up duration was 9.1 months. Presenting symptoms, sites of persistent septal deviation, techniques used to correct the deviation, and surgical results were reviewed. Results. The mean interval between primary and revision surgery was 6.2 years. Forty-eight patients received revision septoplasty and 52 received revision septoplasty combined with rhinoplasty. Nasal obstruction was the most presenting symptom in almost all patients. The most common site of persistent septal deviation was middle septum (58%) followed by caudal septum (31%). Correcting techniques included further chondrotomy and excision of deviated portion in 76% and caudal batten graft in 39%. Rhinoscopic and endoscopic exams showed straight septum in 97% and 92 patients had subjective symptom improvement postoperatively. Conclusion. Middle septum and caudal septum were common sites of persistent deviation. Proper chondrotomy with excision of deviated middle septum and correction of the caudal deviation with batten graft are key maneuvers to treat persistent deviation.

Important Issues of the 2016 Revision of the Korean Arbitration Act (2016년 개정 중재법의 주요내용)

  • Lee, Ho-Won
    • Journal of Arbitration Studies
    • /
    • v.30 no.1
    • /
    • pp.3-37
    • /
    • 2020
  • The Korean Arbitration Act (KAA) enacted in 1966 was entirely revised in 1999, adopting the 1985 UNCITRAL Model Law on International Commercial Arbitration. Korea is trying to be an international arbitration hub in the region, taking advantage of its geographical location in Asia and its highly open economy. KAA was revised in 2016 again in order to reflect the criticisms against the previous KAA, changes in the arbitration environment, and the 2006 amendment to the UNCITRAL Model Law. The basic direction of the revision was to maintain the UNCITRAL Model Law system and to deal with the national arbitration and international arbitration in the same framework. The scope of revision covers all fields of arbitration, including arbitration agreements, arbitrators, arbitral proceedings, interim measures of the arbitral tribunals, recognition/enforcement of arbitral awards, and their annulment. This paper aims to introduce the important issues of the 2016 revision of KAA, to offer important information discussed in the process of revision, and thus to help those concerned in the interpretation and implementation of KAA. The 2016 revision of KAA is expected to help greatly in promoting not only the national arbitration, but also the international arbitration in Korea.

Revision Rotator Cuff Repair (회전근 개 봉합술 후 재수술)

  • Kim, Young-Kyu;Kim, Dong-Wook
    • Journal of the Korean Arthroscopy Society
    • /
    • v.13 no.2
    • /
    • pp.119-125
    • /
    • 2009
  • The primary purposes of revision repair for a failed rotator cuff repair are a relief of pain and functional improvement. Therefore, revision repair is most proper in patients with the functional deficit accompanied with the shoulder weakness as well as the persistent pain. The important factor that is considered in revision repair is a quality of torn cuff. Especially, Care must be taken to ensure that the revision repair is possible, considering the size of tendon defect, atrophy of the muscle, fatty infiltration and extent of the retraction of tendon. Revision repair of a failed rotator cuff repair is more difficult, and the functional results are less satisfactory than those of primary repair, because excessive bursal scarring and tendon retraction may be exhibited, a large or massive tear is often detected, tear has usually been present for a long time, and a quality of muscle-tendon may be poor. So, we discuss our experiences related to revision repair after a failed cuff repair that has been recently introduced through the articles.

  • PDF