• Nuclear Engineering and Technology
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• 제33권5호
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• pp.468-482
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• 2001

As a process of Direct Containment Heating (DCH) issue resolution for Korean Standard Nuclear Power Plants (KSNPs), a containment load/strength assessment with two different approaches, the probabilistic and the deterministic, was performed with all plant-specific and phenomena-specific data. In case of the probabilistic approach, the framework developed to support the Zion DCH study, Two-Cell Equilibrium (TCE) coupled with Latin Hypercubic Sampling (LHS), provided a very efficient tool to resolve DCH issue. In case of the deterministic approach, the evaluation methodology using the sophisticated mechanistic computer code, CONTAIN 2.0 was developed, based on findings from DCH-related experiments or analyses. For three bounding scenarios designated as Scenarios V, Va, and VI, the calculation results of TCE/LHS and CONTAIN 2.0 with the conservatism or typical estimation for uncertain parameters, showed that the containment failure resulted from DCH loads was not likely to occur. To verify that these two approaches might be conservative , the containment loads resulting from typical high-pressure accident scenarios (SBO and SBLOCA) for KSNPs were also predicted. The CONTAIN 2.0 calculations with boundary and initial conditions from the MAAP4 predictions, including the sensitivity calculations for DCH phenomenological parameters, have confirmed that the predicted containment pressure and temperature were much below those from these two approaches, and, therefore, DCH issue for KSNPS might be not a problem.

• Clinical and Experimental Pediatrics
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• 제59권sup1호
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• pp.121-124
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• 2016

Turner syndrome (TS) is a genetic disorder in phenotypic females that has characteristic physical features and presents as partial or complete absence of the second sex chromosome. Growth hormone deficiency (GHD) is a condition caused by insufficient release of growth hormone from the pituitary gland. The concomitant occurrence of TS and GHD is rare and has not yet been reported in Korea. Here we report 2 cases of TS and GHD. In case 1, GHD was initially diagnosed. Karyotyping was performed because of the presence of the typical phenotype and poor response to growth hormone therapy, which revealed 45,X/45,X+mar. The patient showed increased growth velocity after the growth hormone dose was increased. In case 2, a growth hormone provocation test and chromosomal analysis were performed simultaneously because of decreased growth velocity and the typical TS phenotype, which showed GHD and a mosaic karyotype of 45,X/46,XX. The patient showed spontaneous pubertal development. In female patients with short stature, it is important to perform a throughout physical examination and test for hormonal and chromosomal abnormalities because diagnostic accuracy is important for treatment and prognosis.

• Clinics in Shoulder and Elbow
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• 제1권2호
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• pp.147-153
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• 1998

Biceps tendon dislocation combined with rupture of subscapularis tendon is not a common lesion and there has been few case reported in Korea. We experienced one fifty Six years old male patient who shows typical features on physical examination and roentgenographic finding. He was injured by direct trauma on his right shoulder in adducted and external rotated position. He showed positive findings on passive external rotation test and lift-off test. On MR!, the subscpaularis tendon was totally ruptured and the biceps tendon was dislocated to anteromedial aspect of the glenoid labrum, which was typical finding. On the arthroscopic examination, the subscapularis tendon was totally ruptured from its humeral attachment and the biceps tendon was not seen in its normal anatomical position and it was dislocated antermedially to the glenoid labrum. We repaired the subscapularis tendon to humerus by use of suture anchor and the biceps tendon was relocated to its normal anatomical position in the intertubercular groove. On the post operative 6 months follow up, the patient shows improvements in his subjective symptoms and active range of motion.

• Earthquakes and Structures
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• 제25권4호
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• pp.235-247
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• 2023

Bingöl, a city in eastern Türkiye, is located at a very close distance to the Karlıova Region which is a junction point of the North Anatolian Fault Zone and Eastern Anatolian Fault Zone. By bilateral step over of North Anatolian Fault Zone and Eastern Anatolian Fault Zone each other there occurred NorthWest-SouthEast extended right-lateral and NorthEast-SouthWest extended left-lateral fault zones. In this paper, a typical school building located in Bingöl Çeltiksuyu was selected as the case study. Information on the school building and Bingöl Earthquake (2003) have been given in the paper. This study aimed to determine the fragility curves of the school building according to HAZUS 2022, Turkish Seismic Codes 1998, 2007 and 2018. These codes have been introduced in terms of damage limits. Incremental dynamic analysis is a parametric analysis method that has recently emerged in several different forms to estimate more thoroughly structural performance under seismic loads. Fragility analysis is commonly using to estimate the damage probability of buildings. Incremental Dynamic Analysis have performed, and 1295 Incremental Dynamic Analysis output was evaluated to obtain fragility curves. 20 different ground motion records have been selected with magnitudes between 5.6M and 7.6M. Scaling factors of these ground motions were selected between 0.1g and 2g. Comparison has been made between HAZUS 2022 and Turkish Seismic Codes 1998, 2007 and 2018 in terms of damage states and how they affected fragility curves. TSC 1998 has more conservative strictions along with TSC 2018 than TSC2007 and HAZUS moderate and extensive damage limits.

• Imaging Science in Dentistry
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• 제54권1호
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• pp.57-62
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• 2024

Purpose: This report presents a unique case featuring real, ghost, and pseudo-ghost images on the panoramic radiograph of a patient wearing earrings. It also explains the formation of these images in an easy-to-understand manner. Materials and Methods: One real image and two ghost images appeared on each side of a panoramic radiograph of a patient wearing earrings on both sides. Of the two ghost images on each side, one was considered a typical ghost image and the other was considered a ghost-like real image (pseudo-ghost image). The formation zones of the real, double, and ghost images were examined based on the path and angles of the X-ray beam from the Planmeca ProMax. To simulate the pseudo-ghost and typical ghost images on panoramic radiography, a radiopaque marker was affixed to the right mandibular condyle of a dry mandible, and the position of the mandible was adjusted accordingly. Results: The center of rotation of the Planmeca ProMax extended beyond the jaw area, and the area of double image formation also reached beyond the jaw. The radiopaque-marked mandibular condyle, situated in the outwardly extending area of double image formation, exhibited triple images consisting of real, double (pseudo-ghost), and ghost images. These findings helped to explain the image formation associated with the patient's earrings observed in the panoramic radiograph. Conclusion: Dentists must understand the characteristics and principles of the panoramic equipment they use and apply this understanding to taking and interpreting panoramic radiographs.

• Journal of Astronomy and Space Sciences
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• 제14권1호
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• pp.166-178
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• 1997

위성의 수와 복잡도가 증가함에 따라서 다양한 고장이 생기는 경우를 예측하고 고장이 발생한 경우 이를 감지하여 신속히 감지하여 처리하는 노력의 필요성이 증가하게 된다. 현재는 위성 관제소의 전문요원들이 이러한 작업을 수행하고 있지만, 많은 부분이 일상적인 작업이므로 이러한 진단 작업을 자동화할 필요성이 있다. 즉, 일상적인 작업은 전문가시스템이 수행하고, 보다 복잡하고 고차원적인 문제는 전문요원이 해결하는 방식이 바람직하다. 이 논문에서는 이러한 노력의 일환으로 인공지능의 사례기반 방식을 도입한 위성 고장진단 전문가시스템을 구축하기 위한 방법론과 이에 따른 프로토타입 시스템을 설계하고 구현하였다. 사례기반 시스템은 과거의 사례를 기억하고 있는 사례베이스를 구축하고 고장의 증상이 발생한 경우에 이러한 사례베이스로부터 가장 근사한 경우를 인덱스하여 처리하는 기능을 가지고 있다. 이 논문은 이러한 기능을 가지는 사례기반 시스템의 구조와 활용방안에 대해서 서술하고자 한다.

• 한국건축시공학회지
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• 제16권2호
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• pp.151-159
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• 2016

건설프로젝트에서 요구되는 중요한 장비 중 하나는 타워크레인 이다. 특히, 대부분의 고층건물 공사에서는 자재들의 이동작업들을 수행하기 위해 타워크레인이 더욱 요구되어진다. 따라서 타워크레인의 양중계획은 공사기간과 비용의 측면에서도 중요하다 할 수 있다. 하지만, 건설현장 대부분의 양중계획은 여전히 합리적인 작업의 분석없이 현장 관리자들의 경험과 직관에 의존하여 행해지고 있다. Dependency structure matrix (DSM)는 CPM과 Pert 같은 기존의 툴과는 다르게 작업 활동 순서 계획과 정보관리를 하는데 있어서 유용한 툴이다. 본 연구는 타워크레인의 양중 관리를 향상시키기 위하여 실제 건설 현장의 Case study를 통해 타워크레인 양중관리의 새로운 틀을 DSM을 이용하여 제시 할 것이다. DSM을 이용한 T/C의 양중계획의 Case study를 통해 나타난 결과는 기준층 양중 계획에 있어서 T/C의 양중계획을 최적화 시키는데 매우 유용하다는 결론을 보여주었다.

• 조명전기설비학회논문지
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• 제22권4호
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• pp.100-106
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• 2008

일반 가정집 부하는 컴퓨터, 비디오, 냉장고, 마이크로웨이브 오븐, TV, 오디오 등의 많은 비선형 부하를 가지고 있다. 이들 비선형 부하는 고조파 전류를 발생시키고, 전력계통의 정현파 전압을 왜곡시킨다. 고조파 측정 결과로 고조파는 시간에 따라 변하는 특성이 관측되었다. 시간에 따라 변하는 고조파를 해결하기 위해서 쓰이는 가장 보편적인 방법은 누적확률을 사용하는 것이다. 본 논문에서는 가정집 부하의 고조파 현장 측정과 EDSA 프로그램을 사용한 고조파 시뮬레이션을 심도 있게 다루고자 하였다.

• 동의신경정신과학회지
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• 제17권3호
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• pp.157-164
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• 2006

Attention Deficit Hyperactivity Disorder(ADHD) is a psychiatric disorder, characterized by the primary symptoms of inattention and/or impulsivity and hyperactivity. This study is a clinical report of 1 ADHD child treated witb typical Oriental Medical Tberapy(Herb-med, acupunture, etc,) in Combination with Neurofeedback. Conner's parent rating scale, ADHD Diagnostic System were compared between before and after treatment. The results show the typical Oriental Medical Tberapy in Combination with Neurofeedback is efficient in the treatment of ADHD.

• Journal of Medicine and Life Science
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• 제18권3호
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• pp.49-55
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• 2021

Atypical antipsychotics are more effective than typical antipsychotics and have fewer side effects such as tardive dyskinesia and extrapyramidal symptoms; therefore, prescriptions of atypical antipsychotics are increasing. However, recently, it has been reported that atypical antipsychotics have a higher incidence of diabetes, hyperglycemia, and obesity than typical antipsychotics. Atypical antipsychotics induce obesity-inhibiting appetite-related receptors such as serotonin and dopamine. Decreased exercise due to improving psychotic symptoms, and genetic characterictics can also cause weight gain. Hyperglycemia and hypoglycemia were another metabolic problem related to treatment with atypical antipsychotics. The mechanisms of hyperglycemia were mainly related obesity, decreased anorexigenic hormones, and increased insulin resistance in multiple organs. There are also reports that genes related to diabetes have an effect on the incidence of diabetes mellitus treated with atypical antipsychotics. On the other hand, although it is not clear why hypoglycemia occurs, it documented in case reports all over the world. There are more reports of atypical antipsychotics than typical antipsychotics and these are frequently reported in Asians. Further research on the mechanism of hypoglycemia related to atypical antipsychotics is strongly recommended.