• 한국자동차공학회논문집
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• 제25권3호
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• pp.273-286
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• 2017

We develop an inspection method for bearing faults with a rapid change in the rotation speed and present indexes for the pass/fail inspection. At the end of line, impulse noises generated by the operation of machines and conveyors may distort the inspection results. In this paper, we present robust inspection indexes for bearing faults under impulse noises, by taking into account fault signals having pulse train. Using logistic regression, we optimize the pass/fail criterion for each index and evaluate the performance of the inspection indexes based on the total error rate.

• Applied Microscopy
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• 제4권1호
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• pp.1-4
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• 1974

Hitachi HU-125C 전자현미경에 있어서 각 렌즈 전류의 연동에 따른 카메라 상수의 변화를 주사하였다. 시료의 높이 변화가 카메라 상수의 변동에 현저한 영향을 끼치고 있음도 알 수 있었다. 전자회절상과 시편상의 회전은 결정시료를 사용하여 측정하였다. 금속박막을 조사연구함에 있어서 전자현미경의 실제석인 조작방안을 적정화하기 위한 몇 가지 문제를 조사하였다. 본 실험진행을 전자현미경 작업을 통하여 크게 도와 준 김수철씨에게 진심으로 감사드립니다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.827-833
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• 2001

This study is an introduction of ADS in which we have written out programs which can design three-dimensional machine parts and reduce the required time for design them comparing with other CADs. Among the machine parts, screws are commonly used in joining one part to another because of easy handing but welding and rivet are used to join permanently them even thought hard operation. Consequently, we have developed the screw for permanent fixing using stairs type screw threads, which is considered as the main machine parts in joining. For that, we designed permanent fastened screws according to the different rotation angle using VisualLISP and transferred it to ANSYS, structural solution program, to find out allowance load, maximum equivalent stress and where it occur.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.1003-1007
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• 1997

This study is na introduction of ADS in which we have written out programs which can design three-dimensional machine parts and reduce the required time for design them comparing with other CADs. Among the machine parts, screws are commonly used in joining one part to another because of easy handling but welding and rivet are used to join permanently them even thought hard operation. Consequently, w have developed the screw for permanent fixing using stairs type screw threads, which is considered as the main machine parts in joining. For that, we designed permanent fastened screws according to the different rotation angle using VisualLISP and transferred it to ANSYS, structural solution program, to find out allowance load, maximum equivalent stress and where it occur.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회 3차
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• pp.104-110
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• 2010

In this study, a series of two-dimensional model test and numerical analysis was carried out to investigate the pile movement due to tunnelling in soft ground. The model test consists of 21 cases according to locations of the pile tip over the centre position of model tunnel. To identify both the pile and ground movements a close-range photogrammetric technique was adopted in the model test. The results from the model test were compared to the two-dimensional finite element analysis using the CRISP program. It was found that the rotation point on the pile was significantly affected by factors such as the offset distance from the model tunnel and the volume loss that occurred during the tunnelling operation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.2025-2026
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• 2008

This study aims to analyze the features of malfunction of an SFC that helps maintain the frequency of static rotation during the operation of a gas turbine in power plants where power generators and controllers have such a complicated structure as a nerve system, by using electric interference with peripheral devices and maintaining acquired data efficiently. Also, in order to track the possibility of malfunction by various surges and noises which may occur in the process of inserting an SFC during the operation of a gas turbine and to prepare protective measures for the possibility, the study intends to offer data for developing a surge protector suited to the features of a section that is supposed to incur the possibility of malfunction.

• Clinics in Shoulder and Elbow
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• 제19권2호
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• pp.73-77
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• 2016

Background: The first purpose of this study is to compare the clinical and radiological outcomes of surgical treatment for displaced midshaft clavicle fracture (Robinson type 2B1 vs. 2B2) with 3.5-mm low profile clavicular locking compression plate. The second purpose is to evaluate the difference of the results depending on the presence of accompanying injuries. Methods: Forty-nine patients who underwent an operation for the fractures were reviewed retrospectively. Fracture patterns were classified according to group 2B1 and 2B2 using Robinson's classification. For radiological outcome, time to union after operation was evaluated and for clinical outcome, American Shoulder and Elbow Society (ASES) score, University of California in Los Angeles (UCLA) score, visual analogue scale (VAS), and range of motion (ROM) were evaluated from preoperative period to last follow-up period. Results: The mean time for union was not significantly different in the 2B1 group and 2B2 group (p=0.062). No statistically significant difference in ASES score, UCLA score, and VAS was observed between 2B1 and 2B2 (p=0.619, p=0.896, p=0.856, respectively). In ROM, significant higher mean forward flexion and abduction was observed in 2B2 (p=0.025, p=0.017, respectively) and there was no difference in external rotation and external rotation at shoulder $90^{\circ}$ abduction position (p=0.130, p=0.180, respectively). There was no significant difference in clinical outcomes according to the accompanying injuries. Conclusions: There was no difference in clinical and radiological outcome between Robinson 2B1 and 2B2 type fracture after the operation. Accompanying injuries may not affect the clinical result of displaced midshaft clavicle fractures.

• Clinics in Shoulder and Elbow
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• 제17권1호
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• pp.18-24
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• 2014

Background: To evaluate the efficacy of the subclavian portal approach for the arthroscopic repair of isolated subscapularis tendon tear. Methods: We used the subclavian portal to carry out arthroscopic repair of the isolated subscapularis tendon tear. The surgery was carried out in 18 cases (average age of 53) from May 2006 to December 2009 with a mean follow-up period of 35 months. Of these cases, 13 patients had the tear in their dominant arms, 16 were male, and 12 were from traumatic ruptures with on average 7.6 months of symptom period to operation. Additional surgery, acromioplasty and subacromial debridement, were carried out on 4 cases each during the subscapularis repair. The integrity of cuff status was assessed by ultrasonographic examination at 6 months and at 1 year after operation. Results: The initial average range of motion in forward flexion, external rotation, and internal rotation were $160^{\circ}$, $50^{\circ}$ and L4, respectively. At the 1 year follow-up period, these improved to $160^{\circ}$, $52^{\circ}$ and T12, respectively. The initial average functional scores were assessed by KSS, ASES, UCLA, and Constant scoring systems, which were 67, 60, 26, and 65, respectively. These scores improved progressively with time. At 3 months after operation, the scores were 74, 67, 27, and 74; at 6 months, 83, 77, 31, and 75; at 1 year, 88, 86, 32, and 79; and at the final follow-up of 35 months, 84, 92, 34, and 84. Conclusions: In the repair of isolated subscapularis tendon tear, the subclavian portal approach provided a good angle for anchor insertion and sufficient space to manage the upper portion of the tendon tear. In turn, these provisions resulted in satisfactory clinical results.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제23권5호
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• pp.415-421
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• 2001

본 연구는 편측성 완전구순열에서 Cronin의 삼각피판법과 Millard의 회전신전법에 의한 수복시 술후 결과를 비교 하고자 시행되었다. 13명의 편측성 완전구순열 환자를 대상으로 삼각피판법과 회전신전법에 의해 구순성형술을 시행하고, 술전${\cdot}$술후 사진을 토대로 구순부에서는 수직 길이, 반흔, 적순, 입술의 볼록함(lip pout), 큐피드궁의 다섯항목에 대하여, 비부에서는 비익, 비주, 비공저, 비첨, 비중격의 다섯 항보겡 대하여 각 항복 당 $0{\sim}10$점씩 총 100점으로 평가하고 술후 결과를 분석하여 다음과 같은 결과를 얻었다. 총폄점은 Cronin의 삼각피판법을 시행한 경우에 $74.77{\pm}0.86$점으로 Millard의 회전신전법을 시행한 경우의 $66.50{\pm}1.14$점에 비해 유의하게 높았다. 반흔비대는 Millard의 회전신전법을 시행한 경우에 28.6%의 발생율을 나타냈으나 Cronin의 삼각피판법을 시행한 경우에는 발생되지 않았다. 구순 기엥 대한 객관적 평가 결과 평균 길이 비는 Millard의 회전신전법을 시행한 경우에 $0.73{\pm}0.10$으로 Cronin의 삼각피판법을 시행한 경우 $0.80{\pm}0.96$보다 짧았으나 통계학적으로 유의한 차이는 없었다. 이상의 결과는 편측성 오나전구순열에서 Cronin의 삼각피판법이 Millard의 회전신전법보다 더 좋은 결과를 나타냄을 시사한다.

• 대한구순구개열학회지
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• 제15권2호
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• pp.61-68
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• 2012

Cleft lip and palate is the most common congenital facial malformation and has a significant developmental, physical, and psychological impact on those with the deformity and their families. When treating the patients with unilateral cleft lip, many surgeons adopt the rotation advancement flap method originally developed by Millard, or the triangular flap technique developed by Tennison, Randall or the modifications of these techniques. Among these, Millard's rotation advancement flap method has its advantage in designing the flap using the patient's anatomic landmarks. For performing this rotation advancement technique, skillful operation is needed to obtain esthetically satisfactory results. Vomer flap sometimes is used to repair anterior hard palate in complete cleft lip and palate patients. Vomerine tissue is readily available in the vicinity of the palatal defect and elevation of the vomerine flap is relatively simple procedure. In this article, we will introduce the comprehensive vomer flap technique conjunction with primary lip closure and review the comparative studies of the outcome of simultaneous repair of cleft lip and cleft hard palate with Millard's rotation advancement method and vomer flap.