외상 경험군과 비경험군 및 외상 후 스트레스 장애 증상 발생군과 비발생군 청소년에서 기질 성격 특성 비교연구

신승민,이병욱,이중서,김용구,이홍석,Shin, Seung Min,Lee, Byung Wook,Yi, Jung Seo,Kim, Young Ku,Lee, Hong Seock 대한불안의학회 2012 대한불안의학회지 Vol.8 No.2

Objective : The aim of this study was to investigate how trauma and personality system was related by comparing TCI profiles of the trauma versus non-trauma groups and PTSD symptom positive (PTSD symptom [+] group) and PTSD symptom negative groups (PTSD symptom [-] group). Methods : We compared the difference of Temperament and Character Inventory (TCI) profiles between the trauma (n=61) and the non-trauma (n=61) groups, and between the PTSD symptom [+] group (n=40) and PTSD symptom [-] group (n=21). Results : Comparison of the TCI's seven higher dimensions between the PTSD symptom [+] and [-] groups showed significant differences only in C (Cooperativeness). And in the analysis of TCI's lower dimensions the significant differences were observed in the HA1 (Worry and pessimism), HA2 (Tension regarding uncertainty), and C4 (Compassion) subscales. However, significant differences in the higher dimensions appeared more clearly between the non-traumatized group and the traumatized group. Compared to the non-traumatized group, the traumatized group scored significantly higher in HA (Harm avoidance) and RD (Reward dependence), while lower in SD (Self-directedness). Conclusion : Overall, present results suggest that traumatic experiences may affect personality systems regardless of the development and of PTSD symptoms.

탄성밴드를 이용한 저항운동이 여성 고령자의 평형성 및 보행기능에 미치는 영향

신승민(Seung Min Shin),안나영(Na Young Ahn),김기진(Ki Jin Kim) 한국발육발달학회 2006 한국발육발달학회지 Vol.14 No.3

The purpose of this study was to investigate the effect of elastic band resistance training on the improvement of balance ability, and gait performance in the elderly. Subjects were between 58 and 67 years of aged elderly women, and were divided into exercise group(n=10) and control group(n=10). The subjects for experimental group were participated in the elastic resistance training program for 8 weeks. Body composition, muscular function, balance ability, and gait performance test were measured, and data were compared using ANOVA with group and time, paired or independent t-test for post hoc. Significances for statistical analyses were set at p< .05. In body composition as body weight, BMI, LBM, and %Body fat, exercise group showed a positive change as compared to control group, but this change was not statistical significance. In balance ability, exercise group showed a positive effect after training, and one-leg stance of exercise group was a significant (p<.05) higher value than control group after training. In leg muscular endurance by leg chair squat test, exercise group was significantly increased(p<.05) after training. Cadence of temporal distance gait performance test showed a positive effect of training in exercise group. In conclusion, elastic resistance training has a very positive effect to improve balance ability, leg muscular endurance and gait performance.

빠른 도달 속도를 가지는 PI형 가변구조 제어

신승민(Seung-Min Shin),전경한(Kyung-Han Jun),전해진(Hae-Jin Jun),최봉열(Bong-Yeol Choi) 대한전기학회 2001 대한전기학회 학술대회 논문집 Vol.2001 No.11

인공 잡음 환경하에서의 효율적인 백색 가우시안 잡음 대역 선정 방법

신승민(Seung Min Shin),김영수(Young Soo Kim) 한국전자파학회 2010 한국전자파학회논문지 Vol.21 No.11

본 논문에서는 광대역 특성을 갖는 잡음 환경에서 전파 배경 잡음 측정 시스템의 효과적인 측정을 위한 백색 가우시안 잡음 대역 선정 방법을 제안한다. 산업기기들로부터 발생하는 인공 잡음은 주로 광대역으로 발생하는 임펄스성 잡음으로 현대 잡음 레벨 증가의 주 요소이다. 기존의 특이값 분해에 기반한 방법은 주로 백색 스펙트럼 성질에 기초하여 판별하는 방법으로 광대역 신호에 대하여 그 성능을 효과적으로 내지 못하는 단점이 있다. 제안된 방법은 특이값 분해 기반 방법을 가우시안 특성 기반 방법과 병행함으로써 광대역 환경에서도 백색 가우시안 잡음 대역을 효과적으로 판단할 수 있는 성능을 제공한다. 또한, 가우시안 특성 기반 방법으로써 신호강도 확률 분포 그래프 이용 방법이 갖고 있는 판정의 정확도를 개선하는 모델링을 통한 파라미터 추정 기반 방법을 제시하였다. 제안된 방법의 효율성을 입증하기 위하여 실제 측정 시스템에서 획득한 데이터에 적용하여 제안 방법이 광대역 환경에서 기존의 방법에 비하여 우수함을 보였다. In this paper, an effective method has been proposed for selection of white Gaussian noise(WGN) band for radio background noise measurement system under broad band noise environment. MMN which comes from industrial devices and equipment mostly happens in the shape of broad band noise mostly like impulsive noise and this is the main reason for increasing level in the present radio noise measurements. The existing method based on singular value decomposition has weak point that it cannot give good performance for the broad band signal because it uses signal's white property. The proposed method overcomes such a weakness of singular value decomposition based method by using signal's Gaussian property based method in parallel. Moreover, this proposed method hires a modelling based method which uses parameter estimation algorithm like maximum likelihood estimation(MLE) and gives more accurate result than the method using amplitude probability distribution(APD) graph. Experiment results under the natural environment has done to verify feasibility of the proposed method.

전기 자동차 인버터 구동을 위한 게이트 드라이버용 DC-DC 컨버터

신승민(Seung-Min Shin),유승희(Seung-Hee Ryu),이병국(Byoung-Kuk Lee) 전력전자학회 2013 전력전자학술대회 논문집 Vol.2013 No.11

맥도웰의 초월적 정당화: 맥도웰-드레퓌스 논쟁을 중심으로

신승민 ( Shin Seung-min ) 서강대학교 철학연구소 2019 철학논집 Vol.56 No.-

이 논문은 인간의 경험과 개념 사이의 영향 관계에 대한 맥도웰-드레퓌스 논쟁을 다룬다. 맥도웰에 의하면 인간의 경험에는 개념적인 능력이 완전히 작용한다. 반면 드레퓌스(H.Dreyfus)는 어떤 경험에는 개념적 능력이 작용한다고는 할 수 있어도, 모든 경험이 그렇다고 할 수는 없다고 비판한다. 필자는 드레퓌스와 쉬어의 비판은 맥도웰이 자신의 주장을 정당화하는 초월적인(transcendental) 방식을 간과하고 있다고 주장한다. 맥도웰의 초월적 정당화의 핵심은 만일 경험에 개념적 능력이 작용하지 않는다면, 마음과 세계가 맺는 규범적 관계가 가능하지 않다는 것이다. 이에 대해 적어도 어떤 경험은 개념적이지 않다고 비판하는 것은, 경험의 개념성이 어떠한 사실이 가능하기 위한 필요조건인지를 제대로 이해하지 못한 것이다. 물론 드레퓌스는 비개념적 경험의 사례들이 궁극적으로 경험을 가능하게 하는 조건을 드러내준다고 주장한다. 하지만 이 사례들은 단지 경험의 인과적인 조건일 뿐, 정당화된 경험적 사유를 구성하는 조건은 아니다. This paper deals with Mcdowell-Dreyfus debate concerning a relationship between a human experience and a concept. Mcdowell says our conceptual capacities are thoroughly operative in human experience, whereas Dreyfus argues that although the conceptual capacities are operative in some experience, it does not follow that all experiences are conceptual. I defend Mcdowell’s position in this paper. I argue Dreyfus and Schear is ignoring the transcendental aspect of Mcdowell’s justification of his own claim. Its core idea is that unless conceptual capacities are operative in experience, a normative relationship between mind and world would be impossible. Objecting this view on the ground at least some experiences are non-conceptual, is not fully understanding how conceptuality of experience makes certain facts possible, of which it is a necessary condition. Of course Dreyfus shows that cases of the non-conceptual experience reveals the very condition of possibility of experience ultimately. However, those cases are merely causal condition of the experience, not the constitutive condition of a ‘justified’ empirical thought.

도로 토목 공사 현장에서 UAV를 활용한 위성 영상 지도의 정확도 분석

신승민 ( Seung-min Shin ),반창우 ( Chang-woo Ban ) 한국산업융합학회 2021 한국산업융합학회 논문집 Vol.24 No.6

Google provides mapping services using satellite imagery, this is widely used for the study. Since about 20 years ago, research and business using drones have been expanding. Pix4D is widely used to create 3D information models using drones. This study compared the distance error by comparing the result of the road construction site with the DSM data of Google Earth and Pix4 D. Through this, we tried to understand the reliability of the result of distance measurement in Google Earth. A DTM result of 3.08 cm/pixel was obtained as a result of matching with 49666 key points for each image. The length and altitude of Pix4D and Google Earth were measured and compared using the obtained PCD. As a result, the average error of the distance based on the data of Pix4D was measured to be 0.68 m, confirming that the error was relatively small. As a result of measuring the altitude of Google Earth and Pix4D and comparing them, it was confirmed that the maximum error was 83.214m, which was measured using satellite images, but the error was quite large and there was inaccuracy. Through this, it was confirmed that there are difficulties in analyzing and acquiring data at road construction sites using Google Earth, and the result was obtained that point cloud data using drones is necessary.

무선 센서 네트워크에서 에너지 효율적인 퍼지 기반 보안 경계 값 결정 기법

신승민(Seung-Min shin),김병희(Byung-Hee Kim),조대호(Tae-ho Cho) 한국통신학회 2008 한국통신학회 학술대회논문집 Vol.2008 No.11

특이값 분해를 이용한 효율적인 백색가우시안 잡음대역 선정 방법

신승민(Seung-min Shin),김영수(Young-soo Kim),김상태(Sang-tae Kim),석미경(Mi-kyung Suk) 한국통신학회 2009 韓國通信學會論文誌 Vol.34 No.3

배경잡음 측정은 전파환경 조사 및 주파수 점유율의 비교기준인 임계레벨을 산출하는데 반드시 수행되어야 하는 매우 중요한 과정이다. 배경잡음 측정은 측정대상 대역에서 가급적 잡음만으로 구성된 부대역을 선정하고, 선정된 표본 부대역에 대하여 잡음전력을 측정하여 대상대역에 대한 대표값으로 사용하는 과정으로 이루어 진다. 본 논문에서는 배경잡음으로 백색가우시안 잡음을 가정하고, 잡음 측정의 첫 번째 단계에서 신호가 적고 대부분 잡음으로만 구성된 대역을 선별하는데 적용될 수 있는 특이값 분해 (singular value decomposition, SVD)를 이용한 잡음대역 선정 방법을 제안한다. 기존에 널리 쓰여지는 방법인 신호강도확률분포 (amplitude probability distribution, APD) 방법과의 성능비교를 통하여 우수성을 확인하였다. Measurement of the background radio noise is very important process being used in survey of radio noise environment, calculating the threshold level for the frequency occupancy measurement and so forth. First step of background radio noise measurement is to select the sample sub-band which is mostly dominated by the background white Gaussian noise (WGN) within the target band. The second step is to carry out the main measurement of radio noise on this selected sample sub-band for the representative value of the noise power. In this paper, a method for selection of sample sub-band for the effective background radio noise measurement using SVD is proposed under the assumption that background radio noise is WGN. The performance of the proposed method is compared with that of the APD method which is widely used for the same purpose. Simulation results are shown to demonstrate the high performance of the proposed method in comparison with the existing APD method.

양문형 냉장고 내부 덕트 착상 방지를 위한 전산열유동해석

신승민(Seung-Min Shin),김병천(Byeong-Cheon Kim),장경식(Kyoungsik Chang),조용범(Yong Bum Cho),이상욱(Sang-Wook Lee) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.6

본 논문에서는 양문형 냉장고에서 발생하는 착상(Frost)을 방지하기 위해 전산열유동해석을 이용하여 연구를 진행하였다. 냉동실에서 냉장실로 이동하는 유로에서 착상이 발생하며, 비정상해석을 통해 냉장고의 사이클을 고려하였을 때, 냉장실 내부 유동이 내부 덕트로 유입됨을 확인할 수 있었다. 유입된 유동의 유량을 감소시키기 위해, 3가지 냉장고 덕트 형상을 기존 형상과 전산열유동해석으로 비교하였다. 기존 모델에 base hole과 2nd hole을 추가한 모델을 적용하였을 때, 4번째 사이클(9분)동안 0.015kg으로 가장 적은 유량을 보였다. The present work was studied to prevent frost developed in a side-by-side refrigerator using CFD. The frost occurs in the flow path from the freezer to the refrigerator. There was an inflow of the fluid in the refrigerator into the inner duct when the cycle of the refrigerator was considered by unsteady Computational Flow analysis. To reduce the flow rate of the air from the fridge, three types of ducts were compared with the original model using CFD. The lowest flow rate of 0.015kg was observed in the duct that the base hole and 2nd hole were applied to the existing model.