• 한국정보기술학회 영문논문지
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• 제10권2호
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• pp.91-101
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• 2020

Recently, the demand for high penetration of variable renewable energy (VRE) penetration in a power system is increased. In consequence, distribution systems including microgrids confront the increased installation of VRE-based distributed generation. Despite of the high demand of VRE-based distributed generation in a distribution system, the installation of photovoltaic (PV) system in a distribution system has been restricted by various problems. In other words, the hosting capacity for high VRE penetration in a distribution system is limited. This paper analyzes the improvements of hosting capacity VRE penetration of stand-alone microgrid (SAMG) with energy storage system (ESS) by considering virtual-slack (VS) control based on power sensitivity. With the pre-defined power sensitivity, the ESS operates as virtual slack in the SAMG by controlling its bus voltage and phase angle indirectly. Therefore, the ESS enables the increase of VRE penetration in the SAMG. The proposed VS control is realized by analyzing the ESS as a virtual slack in power flow analysis based on power sensitivity. Then its validity is demonstrated with the case study on the SAMG in South Korea with practical data.

• 한국산학기술학회논문지
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• 제13권4호
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• pp.1574-1584
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• 2012

본 연구는 탐색적 연구로서 패션 제품군에서 명품 브랜드와 비명품 브랜드에 따라 디자인 민감도가 차이가 날 것인가를 검토하고 디자인 민감도가 브랜드 동일시와 함께 제품의 구매의도에 어떠한 영향력을 미칠 것인지를 살펴보았다. 분석결과 디자인 민감도는 명품과 비명품간에 차이가 나타나지 않았으나, 구매의도에 미치는 영향에 대해서는 차이가 있었다. 우선 전체 데이타를 살펴본 결과, 브랜드의 디자인 가치와 디자인 추구노력, 추구성향이 구매의도에 긍정적인 영향을 미치는 것으로 나타났다. 즉, 이미지가 일치하는 것보다는 해당 브랜드의 디자인에 대해 가치를 높이 평가하고 좋은 디자인의 제품을 구매하려는 노력을 많이 하는 사람일수록 패션제품의 구매의도가 높다는 것이다. 명품과 비명품으로 구분하여 브랜드 동일시와 디자인 민감도의 구매의도에 대한 영향을 알아본 결과, 명품의 경우 루이비통 패션제품의 디자인 추구성향이 높은 사람이 구매의도가 높음이 나타났고, 비명품의 경우 쌈지의 디자인이 가치가 있다고 느끼는 사람일수록 쌈지 제품의 구매의도가 높아지는 것을 알 수 있었다. 명품일 경우에는 이미 디자인의 가치에 대해서는 많은 사람들 사이에서 인정되고 인식되어 있으므로 해당 제품의 구매의사결정에 영향을 미치지 않지만, 비명품의 경우에는 브랜드 제품의 디자인이 가치가 있다는 사실부터 인지되어야 구매의도에 영향을 미칠 수 있다고 밝혀졌다.

• 초등상담연구
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• 제11권3호
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• pp.351-369
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• 2012

본 연구는 거부에 대한 반응의 개인차를 측정하기 위한 한국판 아동용 거부민감성질문지(K-CRSQ)의 심리측정적 속성을 알아보는데 목적이 있다. 이를 위해 K-CRSQ와 10개의 타당도 지표를 초등학생 286명에게 실시하여 기본적인 신뢰도와 타당도를 알아보았다. 그 결과 내적 합치도는 .85~.92, 검사-재검사 신뢰도는 .75~.82의 범위이었다. 그리고 거부민감성질문지와 10개 타당도지표 점수와 상관을 구한 결과 첫째, 거부민감성의 발달에 영향을 미치는 것으로 밝혀지거나 가정되고 있는 정서적 학대와 또래괴롭힘과는 의미있는 정적 상관 둘째, 거부민감성과 다른 심리적 문제와의 관계에서 중재 또는 매개하는 것으로 밝혀진 자존감, 자기유능감, 사회적 지지와는 부적 상관 셋째, 우울, 불안, 분노, 공격성과 같은 부정적인 심리적 문제와는 유의미한 정적 상관이 있는 것으로 나타났다. 또한 거부민감성 점수를 고저집단으로 분류하여 살펴본 결과 거부민감성이 높은 집단은 낮은 집단보다 의도귀인, 우울, 불안, 공격성 점수가 높고, 거부민감성이 낮은 집단은 높은 집단보다 자존감, 자기유능감, 사회적 지지의 점수가 높은 것으로 나타났다. 마지막으로 연구결과를 기존의 연구결과와 비교하고 연구의 의미와 제한점을 논의하였다.

• The Journal of Korean Physical Therapy
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• 제11권3호
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• pp.1-12
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• 1999

The aim of this study is to examine the sensitivity and characteristics of electromyography abnormalities detected by using various paramenters in patients with lumbosacral radiculopathies. EMG is widely used for disgnosing and localizing the level of radiculopathy. The results of the study were as follow : 1. In electromyography, L5 radiculopathy usa 95 cases(51.690). S1 radiculopathy was $45m(24.5\%)$ L4 radiculopathy was 18cases $(9.8\%)$, and L2, 3 radiculopathy was 8cases$(4.3\%)$. Remains 18cases$(9.8\%)$ had no definite radiculopathy. 2. Peroneal and tibial motor nerve conduction velocity studies were not significant as compared to the side to side. 3. Latency of H-reflex in L5 radiculopathy was $30.55\pm2.47$ in affected side, $29.47\pm2.29$ in unaffected side, in S1 radiculopathy was $33.00\pm2.03$ in affected side, R30.18\pm2.21$ in unaffected side. It was statistically significant(p<0.01). H-reflex mean difference of S1 radiculopathy group was significantly prolonged as compared to the L5 and S1 radiculopathies(p<0.001). 4. In L2, 3 radiculopathy, abnormal spontaneous activities and motor unit action potentials were showed high sensitivity in upper lumber paraspinal, hip adductors, quadriceps and iliopsoas muscles. 5. In L4 radiculopathy, lower lumbar paraspinal, tibialis anterior, quadriceps muscles were showed high sensitivity. 6. In L5 radiculopathy, lower lumbar paraspinal, extensor hallucis longus, extensor digitorum longus, peroneus longus, extensor digitorum brevis, gluteus maximus, tensor fasciae latae muscles were showed high sensitivity. 7. In S1 radiculopathy, lower lumbar paraspinal, gluteus maximus, peroneus longus, soleus, abductor hallucis, hamstrings, extensor digitorum brevis, extensor hallucis lognus, gastrocnemius muscles were showed high sensitivity.

• 대한본초학회지
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• 제30권2호
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• pp.37-42
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• 2015

Objectives : The aim of this study was to investigate the effects of licorice supplementation on muscle injury, plasma cortisol, testosterone and insulin sensitivity after high intensity resistance exercise. Methods : The fourteen health college male students were voluntarily participated in this study and were randomly divided into 2 groups: Control group (CON, n=7), Licorice group (LR, n=7). LR group ingested 2 g/time of licorice extract (mixed with 100 ml of water) two times/day for 10 days while the CON group ingested 100 ml of water. All subjects performed a high intensity resistance exercise (half-squat, 8 RM at 80% one-repetition maximum, 5 sets, 1min rest). Blood samples were collect before (-7) and after (0) licorice supplementation, and then 1 day, 2 day and 3 day post exercise. After 10 day treatment, plasma creatine kinase, cortisol, testosterone, glucose, insulin were measured. To determine the insulin sensitivity, HOMA-IR was calculated. Results : Plasma creatine kinase activities were significantly elevated after exercise, but there was not different between two groups. The plasma cortisol and testosterone levels were not significantly different between two groups. Plasma glucose levels were increased at 1 day and 2 day after exercise in the LR comparing with CON group (P<0.05) but plasma insulin levels were significantly lower in comparison with CON. HOMA-IR were significantly lower in the LR than CON group at 0 day to 3 day (P<0.05). Conclusions : The results of the current study suggest that licorice supplementation for 10 days might not attenuate the high-intensity exercise-induce muscle injury but may enhance the whole-body insulin sensitivity.

• 산업융합연구
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• 제21권12호
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• pp.25-35
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• 2023

본 연구는 고등학생의 성 미디어 리터러시 인식과 성 태도가 성인지 감수성에 미치는 영향을 파악하기 위한 서술적 조사연구이다. 본 연구대상자는 D시에 소재하는 고등학생 120명으로, 연구에 자발적으로 동의 후 참여하였다. 자료는 2022년 11월 28일부터 12월 15일까지 수집되었으며, SPSS 22.0 프로그램을 사용하여 descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient 및 hierarchical regression analysis 방법으로 분석되었다. 연구결과, 성인지 감수성에 영향을 미치는 요인은 성 태도(β=-.317, p<.001), 아버지의 교육수준(β=.305, p<.001), 성별(β=.262, p=.001), 성 지식 출처(β=-.252, p=.001), 성 미디어 리터러시 인식(β=-.143, p=.045) 순으로 영향을 미쳤으며, 설명력은 41.6%로 나타났다(F=13.395, p<.001). 본 연구는 다양성이 강조되는 미래 사회에서 필수적인 역량으로 간주되는 성인지 감수성을 높이기 위해 학문적·실무적·정책적 제언을 하였다는 점에서 의의를 갖는다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 봄 학술발표회 논문집
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• pp.119-126
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• 2004

A continuum-based design sensitivity analysis and topology optimization methods are developed for power flow analysis. Efficient adjoint sensitivity analysis method is employed and further extended to topology optimization problems. Young's moduli of all the finite elements are selected as design variables and parameterized using a bulk material density function. The objective function and constraint are an energy compliance of the system and an allowable volume fraction, respectively. A gradient-based optimization, the modified method of feasible direction, is used to obtain the optimal material layout. Through several numerical examples, we notice that the developed design sensitivity analysis method is very accurate and efficient compared with the finite difference sensitivity. Also, the topology optimization method provides physically meaningful results. The developed is design sensitivity analysis method is very useful to systematically predict the impact on the design variations. Furthermore, the topology optimization method can be utilized in the layout design of structural systems.

• 디지털산업정보학회논문지
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• 제16권2호
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• pp.117-128
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• 2020

The aim of this study was to examine price sensitivity of industrial products purchased via a group buying system and how industrial products for a group buying system differ from general industrial products, and then identify the major factors in selecting products and the important determinants in purchasing industrial products for school foodservices. The survey was conducted with 250 dietitians (teachers) in Gyeonggi-do Province, who were using industrial products for a group buying system and general industrial products. A paired t-test showed a difference in satisfaction between industrial products for a group buying system and general industrial products by factors, while statistically significant differences were found for red pepper paste, fermented soybean paste and soy sauce in all nine satisfaction factors, including product quality, packaging state, labeling, hygiene, item diversity, specification diversity, price appropriateness and supply. Moreover, analyzing price sensitivity for industrial products for a group buying system, using the PSM method with respect to the issue of high price, showed that the respondents considered that the current unit purchase prices were high for all items investigated. This study suggests that schools would purchase more industrial products for a group buying system, when the pricing of the products are considered with the purchase intention of dietitians (teachers).

• Asian Pacific Journal of Cancer Prevention
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• 제17권11호
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• pp.4973-4976
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• 2016

Objective: This article concerns evaluation of the sensitivity, specificity and accuracy of FNAB for pre-surgical diagnosis of benign and malignant lesions of major and minor salivary glands of patients treated in the Department of Head and Neck Surgery of Erasto Gartner Hospital. Methods: This retrospective study analyzed medical records from January 2006 to December 2011 from patients with salivary gland lesions who underwent preoperative FNAB and, after surgical excision of the lesion, histopathological examination. Results: The study had a cohort of 130 cases, but 34 cases (26.2%) were considered unsatisfactory regarding cytology analyses. Based on the data, sensitivity was 66.7% (6/9), specificity was 81.6% (71/87), accuracy was 80.2% (77/96), the positive predictive value was 66,7% (6/9) and the negative predictive value was 81.6% (71/87). Conclusion: Despite the high rate of inadequate samples obtained in the FNAB in this study the technique offers high specificity, accuracy and acceptable sensitivity.

• Water Engineering Research
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• 제6권2호
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• pp.73-89
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• 2005

Two kinds of high resolution GCMs with the same spatial resolutions but with different schemes run by domestic and foreign agencies are used to clarify the usefulness and sensitivity of GCM for water resources applications for Korea. One is AMIP-II (Atmospheric Model Intercomparison Project-II) type GCM simulation results done by ECMWF (European Centre for Medium-Range Weather Forecasts) and the other one is AMIP-I type GCM simulation results done by METRI (Korean Meteorological Research Institute). Observed mean areal precipitation, temperature, and discharge values on 7 major river basins were used for target variables. Monte Carlo simulation was used to establish the significance of the estimator values. Sensitivity analyses were done in accordance with the proposed ways. Through the various tests, discrimination condition is sensitive for the distribution of the data. Window size is sensitive for the data variation and the area of the basins. Discrimination abilities of each nodal value affects on the correct association. In addition to theses sensitivity analyses results, we also noticed some characteristics of each GCM. For Korean water resources, monthly and small window setting analyses are recommended using GCMs.