• 한국컴퓨터그래픽스학회논문지
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• 제1권2호
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• pp.201-212
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• 1995

This paper presents a new method of dynamics-based synthesis of bipedal, especially human, walking. The motion of the body at a time point is determined by ground reaction force and torque under the support foot and joint torques of the body at that time point. Motion synthesis involves specifying conditions that constrain ground reaction force and torque, and joint torques so that a given desired motion may be achieved. There are conditions on a desired motion which end-users can think of easily, e.g. the goal position and orientation of the swing foot for a single step and the time period of a single step. In this paper, we specify constraints on the motion of the support foot, which end-users would find difficult to specify. They are constraints which enforce non-sliding, non-falling, and non-spinning the support foot. They are specified in terms of joint torques and ground reaction force and torque. To satisfy them, both joint torques and ground reaction force and torque should be determined appropriately. The constraints on the support foot themselves do not give any good clues as to how to determine ground reaction force and torque. For that purpose, we specify desired trajectories of the application point of vertical ground reaction force (ground pressure) and the application point of horizontal ground reaction (friction) force. The application points of vertical pressure and friction force are good control variables, because they are indicators to kinds of walking motions to synthesize. The synthesis of a bipedal walking motion, then, consists of finding a trajectory of joint torques to achieve a given desired motion, so that the constraints are satisfied under the condition of the prescribed center of pressure and center of friction. Our approach is distinguished from many other approaches, e.g. the inverted-pendulum approach, in that it captures and formulates dynamics of the support foot and reasonable constraints on it.

• 한국운동역학회지
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• 제22권2호
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• pp.229-236
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• 2012

The purpose of this study is to analyze the differences in foot type of female college students according to academic major in both feet. The subjects for this study were 216 female students who took liberal arts classes in Seoul. Dependent variables were students' field of study -specifically whether or not they majored in physical education. Analysis of students' foot type and Malalignment Syndrome were measured using Resting Calcaneous Stance Position (RCSP). There were five categories for RCSP angle: Severe Pes Planus (< $-5^{\circ}$), Pes Planus ($-3^{\circ}{\sim}-4^{\circ}$), Pes Rectus (${\pm}2^{\circ}$), Pes Cavus ($+3^{\circ}{\sim}+4^{\circ}$), Severe Pes Cavus (> $+5^{\circ}$). ${\chi}^2$ analysis was used for statistical analysis. RCSP for all subjects (432 feet) occurred at the following frequency: Pes Planus(43.9%), Pes Rectus(43.8%), and Pes Cavus(12.3%). These levels were different for physical education majors, with Pes Planus at 42.6%, Pes Rectus at 49.4%, and Pes Cavusat 8.0%. Non-physical education majors exhibited Pes Planus at 45.0%, Pes Rectus at 39.9%, and Pes Cavus at 15.1%. 15.3% (33 subjects) of all students had Malalignment Syndrome. In conclusion, 56.2% of female college students had a foot deformity. There was nearly four times more Pes Planus than Pes Cavus. According to these results, exercise can be prescribed to alleviate foot deformities, especially supination. Severe pronation and supination problems appeared less amongst students not majoring in physical education. Thus, although exercise might be one cause of foot deformity, it can also help resolve problems with over-supination. Further study will be needed to understand and resolve the specific mechanism of over-supination.

• 한국정보통신학회논문지
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• 제4권2호
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• pp.443-451
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• 2000

지금가지 과학기술정보를 데이터베이스화한 여러 형태의 학술정보 데이터베이스가 있었지만, 이용자의 욕구를 만족시켜주는데는 미흡하였다. 따라서 이용자의 학술정보 데이터베이스의 기능을 보충하는 새로운 지식표현 패러다임으로 기술정보공간(ICPIS : Information Communication Papers Intelligent Surveyor)을 제안한다. 이것은 기술정보로부터 자동적으로 구축되어 그 중에서 이용자가 자유롭게 탐방 할 수 있는 정보 공간이다. 구축방법과 탐방기능을 명확히 하여 실 시스템을 구축, 평가하는 것이 연구의 목적이다, 이를 위해 ICPIS는 Keyword로 기술된 논문군을 입력하여 논문내용의 항목별 요약, 유사논문의 시각적 표시와 비교, 인과관계의 추출을 시작으로 논문의 요약정보, Survey정보를 사용자에게 제공한다. ICPIS에서 중심적 역할을 나타내는 것은 KP(Knowledge Piece)로 불리고, 이는 기술정보의 추출법과 구조화법을 일체화한 Domain지식의 패키지이다. ICPIS는 KP별로 기술된 Keyword에서 자연언어처리에 해당되는 기술정보를 논문 중에서 추출하여 KP에서 규정된 요약구조로 생성한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 춘계학술대회
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• pp.101-104
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• 2015

본 논문에서는 무선 센서 네트워크에서 주어진 상황에 따라 다수의 쿼드콥터들이 편대를 유동적으로 구성할 수 있는 비행 기법을 제안한다. 기존 연구에서는 미리 정해진 구조의 편대로만 비행을 하고 센서를 통해 비행체 간의 거리를 알아야만 편대 유지를 할 수 있었다. 또한, 센서에서 발생하는 오차로 인해 비행체 간 거리가 일정하지 않다는 문제점이 발생한다. 본 논문에서는 상대 좌표 값을 기반으로 한 가상 지도를 통해 실내 외, 장애물 등에 영향 받지 않고 쿼드콥터의 현재 위치를 이용하여 주어진 상황에 맞는 편대 비행을 하는 알고리즘을 제안한다. 제안된 알고리즘은 선도기 추종 기법(Leader-Follower Technique)으로 메인 쿼드콥터가 주어진 상황을 판단하여 무선 통신을 이용해 서브 쿼드콥터들에게 명령을 내려 편대의 구조를 정하는 방법이다. 모의실험 결과, 제안한 알고리즘이 기존방식에 비해 어떠한 상황을 감지함에 있어서 편대 비행이 효율적인 것을 확인하였다.

• 무역상무연구
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• 제12권
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• pp.405-427
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• 1999

Although Uniform Customs and practice for Documentary(UCP) is not a law, it applies to most documentary credits and is binding on all parties unless otherwise expressly stipulated. Besides, Uniform Commercial Code(UCC) Article 5 was codified by the United States and was adopted by every state. Moreover, the New York version of the UCC Article 5-102(4) specifically providing that the UCC does not apply to letters of credit where the parties agree to be governed by the UCP. Identical nonuniform Articles were latter added in Alabama, Arizona, and Missouri. The fact that courts in forty-six of the fifty states are bound by Article 5. Until now, Article 5 of the UCC has probably had an impact on the decisions in New York and the New York common law. Therefore, I examined a few issues on application between Article 5 of the UCC and the UCP. First, although the UCP attempt to introduce a new for examination of document by incorporating "standard practice of financial institutions" and "international banking practice", the standards for documentary compliance are not clear. The UCC attempt to rely on the matter of interpretation for the court, but the UCP would probably be interested in examining in about bank's internal practices as reflected in UCP Articles. Second, the rule for nondocumentary conditions is a useful for stand-by credit transactions under the UCC, but these conditions would probably put the bank in an even worse position in case of documentary credit transactions under the UCP. Third, the UCP does not contain any provision governing the fraud exception, but the UCC codified the fraud and forgery rules developed through American case law. Fourth, the UCP treats the issue of transfer in much more detail than the UCC does. In contract, the UCP's treatment of assignment of proceeds is brief. Finally, I suggest that the fraud exception rules should be prescribed in the UCP in order to protect the issuing bank and the applicant when an unscrupulous party attempts to defraud.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2005년도 제30회 춘계학술대회
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• pp.71-74
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• 2005

To introduce the four-dimensional computed tomography (4DCT, Light Speed RT, General Electric, USA) scanner newly installed in our department and evaluate its feasibility for gated radiotherapy. Respiratory signal measured by real-time position management (RPM$^{\circledR}$, Varian Medical, USA) was recorded in synchronization with the 4DCT scanner. 4DCT data were acquired in axial cine mode and sorted retrospective image based on respiratory phase. PTVs delineated from helical CT and 4DCT images were compared. The PTV delineated from conventional helical CT images was 2 cc larger than that from 4DCT images. Dose in PTV of the plan from retrospective CT was 99.3% (minimum=72.0%, maximum=106.5%) and that of helical CT plan was 95.2% (minimum=24.1%, maximum=106.4%) of prescribed dose. Comparing with DVHs of both plan, the coverage for 4CDT plan was 3.7% improved. It is expected that 4DCT could improve tumor control and reduce radiation toxicity for liver cancer.

• 한국미생물·생명공학회지
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• 제38권4호
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• pp.475-480
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• 2010

Actinomycetes are Gram-positive soil bacteria and one of the most important industrial microorganisms due to superior biosynthetic capabilities of many valuable secondary metabolites as well as production of various valuable bioconversion enzymes. Among them are cytochrome P450 hydroxylase (CYP), which are hemoproteins encoded by a super family of genes, are universally distributed in most of the organisms from all biological kingdoms. Actinomycetes are a rich source of soluble CYP enzymes, which play critical roles in the bioactivation and detoxification of a wide variety of metabolite biosynthesis and xenobiotic transformation. Cyclosporin A (CyA), one of the most commonly-prescribed immunosuppressive drugs, was previously reported to be hydroxylated at the position of 4th N-methyl leucine by a rare actinomycetes called Sebekia benihana, leading to display different biological activity spectrum such as loss of immunosuppressive activities yet retaining hair growth-stimulating side effect. In order to improve this regio-selective CyA hydroxylation in S. benihana, previously-identified several secondary metabolite up-regulatory genes from Streptomyces coelicolor and S. avermitilis were heterologously overexpressed in S. benihana using an $ermE^*$ promoter-containing Streptomyces integrative expression vector. Among tested, SCO4967 encoding a conserved hypothetical protein significantly stimulated region-specific CyA hydroxylation in S. benihana, implying that some common regulatory systems functioning in both biosynthesis and bioconversion of secondary metabolite might be present in different actinomycetes species.

• 한국지진공학회논문집
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• 제9권2호통권42호
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• pp.71-80
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• 2005

유체자유수면의 동적거동을 합리적으로 예측하기 위해서는 비선형 특성을 보이는 자유수면의 동역학적 경계조건을 고려해야할 뿐만 아니라 시간에 따라 변화하는 자유수면의 위치변화에 따른 운동학적 경계조건을 고려하여야 한다. 이러한 문제는 대상구조물이 3차원이 될 경우 더욱 복잡해지므로 3차원 비선형 유체자유수면의 해석은 이론해의 도출이 어려우며 수치해석 방법을 이용하는 것이 효과적이다. 본 연구에서는 수치해석 안정성이 높고 3차원 문제에서도 하나의 변수로 유체거동을 모사할 수 있는 arbitrary Lagrangian-Eulerian approach 를 경계요소에 적용하여 효율적이며 안정적인 유체 대변형 해석기법을 개발하였다. 개발된 기법은 향후 자유수면의 비선형 효과를 고려한 유체-구조물 상호작용 해석에 효과적으로 적용할 수 있을 것으로 판단된다.

• Annals of Rehabilitation Medicine
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• 제42권6호
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• pp.863-871
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• 2018

Objective To evaluate the association between progression of curvature of scoliosis, and correction for functional component in patients with juvenile idiopathic scoliosis (JIS). Methods We retrospectively reviewed medical data of patients prescribed custom molded foot orthosis (FO) to correct inequality of RCSPA (resting calcaneal stance position angle), and chose 52 patients (26 females, 26 males) with Cobb angle ${\geq}10^{\circ}$ in radiology and uneven pelvic level at iliac crest by different RCSPA (${\geq}3^{\circ}$) as a factor of functional scoliosis. They had different hump angle ${\geq}5^{\circ}$ in forward bending test, for idiopathic scoliosis component. Their mean age and mean period of wearing FO were $79.5{\pm}10.6months$ and $18.6{\pm}0.70months$. Results Cobb angle was reduced from $22.03^{\circ}{\pm}4.39^{\circ}$ initially to $18.86^{\circ}{\pm}7.53^{\circ}$ after wearing FO. Pelvis height difference and RCSPA difference, were reduced from $1.07{\pm}0.25cm$ initially to $0.60{\pm}0.36$, and from $4.25^{\circ}{\pm}0.71^{\circ}$ initially to $1.71^{\circ}{\pm}0.75^{\circ}$ (p<0.01). Cobb angle improved most in 9 months. However, there was no significant improvement for those with more than $25^{\circ}$ of Cobb angle initially. Mean Cobb angle improved in all age groups, but patients less than 6 years had clinically significant improvement of more than $5^{\circ}$. Conclusion JIS can have functional components, which should be identified and managed. Foot orthosis is useful in correcting functional factors, in the case of pelvic inequality caused by different RCSPA, for patients with juvenile idiopathic scoliosis.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.366-382
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• 2023

Among the many novels penned by Thomas Hardy, the novel "Tess of the d'Urbervilles" came into print in 1891.In this novel, Hardy portrays Tess who was born and raised in a rural middle-class family but ends up working as a laborer, trapped in a society where she is subjugated by the men's wealth, leading a life marked by loneliness and isolation. The novel presents the status of women, moral struggles, and the challenging fate that they must overcome. It highlights the powerlessness of women living in a structurally unreasonable social environment, forced to depend on the ever-changing twists of destiny. This story delves into the complexities of love between the genders, moral conflicts, and the societal criticism that must be confronted. By utilizing the life of the young woman Tess, it underscores the struggle for existence and elucidates the roles, expectations, and constraints imposed on gender during the Victorian era. This research paper aims to compare the roles of women in the Victorian era in Britain and woman in contemporary Korean society. The Victorian era featured rigid gender norms, confining women to prescribed roles. In contrast, modern Korean society blends tradition and modernity, empowering women to play vital roles and reshape societal norms. Our research explores the interplay of tradition and change, providing a comprehensive understanding of women's evolving roles in both historical and contemporary contexts. We will present our discussions regarding the enduring roles that women have faced in both periods. Furthermore, we aim to highlight the distinctive roles women are called upon to play while dealing with the swift transformations in contemporary Korean society, recognizing them as essential agents in the agents in advancing Korean society.