Pythagorean-Hodograph 곡선을 통한 방위 센서를 탑재한 항공기의 경로 최적화

임승한,방효충 한국항공우주학회 2010 한국항공우주학회 학술발표회 논문집 Vol.2010 No.4

무인항공기 유도를 위한 새로운 벡터 필드 제안

임승한,방효충 한국항공우주학회 2012 한국항공우주학회 학술발표회 논문집 Vol.2012 No.4

벡터필드를 이용한 유도는 주행 로봇의 유도 등에 있어 널리 사용되어왔으며, 근래에 들어서 무인항공기 유도에서도 사용되기 시작하였다. 벡터필드 유도는 고전적인 유도 법칙에 비해서 협곡이나 도심지, 장애물이 많은 지형 등의 복잡한 유도 문제를 비교적 쉽게 접근할 수 있도록 도와준다. 본 연구에서는 새로운 벡터필드를 제안하여 벡터필드 유도가 적용된 무인항공기에 운용의 다양성을 부여하고자 한다. 본 연구에서는 총 세 가지의 벡터필드를 제안할 것이며, 간단한 수식 전개를 통하여 이 벡터필드들이 어떠한 특성을 가지는지 분석할 것이다. 또한 각각의 벡터필드가 어떤 임무를 위한 유도에 유용하게 사용될 수 있는지에 대해서도 언급할 것이다. Vector field is popular method to guide wheeled robots, and it is implemented to unmanned aircraft guidance in these days. Vector field guidance is useful when a vehicle is in a valley, urban areas, or areas with many obstacles such as trees rather than traditional guidance law. In this research, new vector field will be introduced or proposed to increase capabilities of unmanned aircrafts implemented vector field guidance already. And they will be analyzed via derivation of simple equations. Finally, it will be introduced how and where they can be implemented to guidance problem for unmanned aircrafts.

동적환경에서의 탐색임무를 위한 다수 무인기 경로계획

임승한,방효충 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-

현대 회화의 평면 개념 고찰

임승한 유럽문화예술학회 2013 유럽문화예술학논집 Vol.4 No.2

Modern Painting has rather different characteristics than those of traditional art, and they art largely based on the self-sufficiency of art. Traditional art focused on representing the three-dimensional space in the two-dimensional plane, capitalizing on the optical illusion , its primary goal was to faithfully represent reality. Modern art on the other hand has been self-critically commenting on the planeness of the painting that constitutes the ontological condition of the genre. However, such an attitude led to a conceptual confusion between the plane in the painting and the actual plane of the canvas, and this in turn resulted in an extreme forms of materialism such as minimalism that questions the distinction between art and non 따t. 1n other words, "A painting is a plane" can be translated into "A painting should be flat", and this means that we should exclude the illusion of three-dimensionality that traditional painting tried to achieve. Modern painting argued that the verisimilitude of painting is nothing more than illusion, and this attitude has reduced the plane of the painting to a material space rather than a spiritual one. That is to say, modern painting has failed to achieve a genuine planeness, and this study tries to explain why. Fist of a11, let' s look at the relationship between painting and illusion. The illusion is a self-generative concept that changes as modes of painting undergo transforms rather than a fixed, universal concept. As a universal phenomenon of visual perception, it is an essential element in painting. Greenburg says, "The first brush-stroke on canvas destroys the planeness of reality." in his essay 개10demist Painting." implying that the modemist concept of plane has failed to explain the way art relates to reality. Modernist painting, in the other words, has not succeeded in attaining planeness by excluding illusion. Second, let’s look at the plane as a material concept. Everγ object consists of space and it’s in a perpetual motion. Hard, inanimate objects such as a stone or metallic object seem to be packed with particles without any empty space in it , in reality, however, it contains as much as over a hundred times of space in the Sun and the particles that constitute it art constantly moving. Einstein’s special theory of relativity (E=mc2)shows that the mass which is the essence of material is no other than a ferociously rotation of energy. Microscopically speaking, the canvas as a form of material is in a perpetual motion in which the material energy is ferociously rotating. A plane then cannot exist in a material sense in the three-dimensional world such as ours, and the modemist concept of plane is nothing but a theoretical hypothesis. The failure of modemist painting derives from the exclusion of the essence of painting, the optical illusion, from the realm of art and the misguided attempt to view art only as a material phenomenon.

攻擊行動을 보이는 精神分裂病 患者의 臨床樣相 및 知能의 特徵

임승한,이귀행,오소영 대한생물치료정신의학회 2001 생물치료정신의학 Vol.7 No.1

Objective : This study was performed to evaluate the clinical and intelligent characteristics of the schizophrenia patients with aggressive behaviors in wards. Subjects and Methods : 112 schizophrenic patients were selected among the patients admitted to the department of neuropsychiatry, Wonkwang University, school of medicine, from January, 1997 to December, 1999. The selected schizophrenic patients were divided into two groups(a group with aggressive behavior, a group without aggressive behavior). We assessed these aggressive behaviors by Yudofsky's Overt Aggression Scale. Clinical features and results of Korean-Wechsler Adult Intelligence Scale(K-WAIS) in each group were compared. Results : 1) The aggressive group showed higher past year highest global assessment of functioning(GAF) & current GAF than the non- aggressive group. 2) The aggressive group had more positive symptoms and less negative symptoms than the non-aggressive group. 3) The aggressive group showed higher scores of picture arrangement, block design, object assembly and digit symbol on the performance scale and vocabulary, comprehension on the verbal scale than the non-aggressive group. 4) The aggressive group showed higher scores of total intelligence Quotient(IQ), performance IQ and verbal IQ than the non- aggressive group. Conclusions : The aggressive schizophrenia patients showed better adjustment and intelligence, especially the performance intelligence than the other schizophrenia patients without aggression . The aggression in schizophrenia seemed to have some reactive component.

기능성 소화장애증 환자의 정신사회적 요인과 위장 생리활동성의 연관성에 관한 연구 - 위 배출능 검사를 이용하여 -

임승한,문성근,이상열,김진아 한국정신신체의학회 2001 정신신체의학 Vol.9 No.1

Guidance to Control Arrival Angle and Altitude for An Unpowered Aerial Vehicle

임승한,조성봉,이은용 한국항공우주학회 2020 International Journal of Aeronautical and Space Sc Vol.21 No.4

To increase the effectiveness of a glide-bomb attack, it must be able to control the direction in which it strikes the target. Since glide bombs have different characteristics from missiles, it would not be suitable to attack at the high speed; so, it is not appropriate to use the guidance laws for the typical missiles directly. While there are many similarities with TAEM guidance for re-entry vehicle, implementation on glide bombs can degrade the performance. This paper takes into consideration the characteristics of glide bomb well and proposes a robust and straightforward guidance scheme, which is also proper for an unpowered aerial vehicle. This scheme guides the vehicle to reach the ‘target window’ controlling in the desired direction with adequate potential and kinetic energy, even in strong winds. At the end of this paper, the flight tests prove the practicality of this approach.

다수 항공기의 정지 목표물 감시를 위한 경로 생성

임승한,방효충 한국항공우주학회 2010 한국항공우주학회 학술발표회 논문집 Vol.2010 No.11

Chitosan을 이용한 Levan Fructotransferase의 고정화

임승,이기영,최춘순 전남대학교 촉매연구소 2001 觸媒硏究 論文集 Vol.22 No.-

The condition for the immobilization of the partially purified levan fructotransferase and the properties of the immobilized enzyme was investigated. Levan fructotransferase was immobilized on chitosan with glutaraldehyde, crosslinking agent. The optimum activity of immobilized enzyme was obtained at 0.125%(v/v) glutaraldehyde concentration. The immobilized enzymes had 40% higher relative activity than free enzyme. The optimal temperature and pH were 55℃ and 6.0 or 5.5 for the immobilized and free enzyme. The conversion ratio of free enzyme and immobilized enzyme was 45% and 36% respectively at 24hr.

Binary interfacial layers of mesoporous TiO₂/ZnO templated by graft copolymer for quasi solid-state dye-sensitized solar cells

임승만,임정민,박정태 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0

A graft copolymer based mesoporous TiO₂/ZnO interfacial layers for quasi solid state dyesensitized solar cells (QDSSCs) has been fabricated by the sol-gel method. The features of the mesoporous TiO₂/ZnO interfacial layers were tested by SEM, EDS, and UV-vis spectroscopy. The cells were systemically tested by the photocurrent-voltage (J-V) curve, and EIS techniques. The mesoporous TiO₂/ZnO interfacial layers was found to accelerate electron transfer, light harvesting and retard electron recombination, eventually leading to an efficient improve in energy conversion efficiency. The QDSSCs assembled with the interfacial layer consisting of mesoporous TiO₂/ZnO exhibited short-circuit current density (JSC) of 9.8 mA cm-2, open-circuit voltage (VOC) of 0.76 V and conversion efficiency of 5.0%, which were higher than that without interfacial layer (4.2 %).