• Journal of Information Processing Systems
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• 제19권5호
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• pp.631-640
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• 2023

Short-text similarity calculation is one of the hot issues in natural language processing research. The conventional keyword-overlap similarity algorithms merely consider the lexical item information and neglect the effect of the word order. And some of its optimized algorithms combine the word order, but the weights are hard to be determined. In the paper, viewing the keyword-overlap similarity algorithm, the short English text similarity algorithm based on lexical chunk theory (LC-SETSA) is proposed, which introduces the lexical chunk theory existing in cognitive psychology category into the short English text similarity calculation for the first time. The lexical chunks are applied to segment short English texts, and the segmentation results demonstrate the semantic connotation and the fixed word order of the lexical chunks, and then the overlap similarity of the lexical chunks is calculated accordingly. Finally, the comparative experiments are carried out, and the experimental results prove that the proposed algorithm of the paper is feasible, stable, and effective to a large extent.

• Steel and Composite Structures
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• 제33권2호
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• pp.163-180
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• 2019

A semi analytical method is employed to analyze free vibration characteristics of uniform and stepped functionally graded circular cylindrical shells under complex boundary conditions. The analytical model is established based on multi-segment partitioning strategy and first-order shear deformation theory. The displacement functions are handled by unified Jacobi polynomials and Fourier series. In order to obtain continuous conditions and satisfy complex boundary conditions, the penalty method about spring technique is adopted. The solutions about free vibration behavior of functionally graded circular cylindrical shells were obtained by approach of Rayleigh-Ritz. To confirm the dependability and validity of present approach, numerical verifications and convergence studies are conducted on functionally graded cylindrical shells under various influencing factors such as boundaries, spring parameters et al. The present method apparently has rapid convergence ability and excellent stability, and the results of the paper are closely agreed with those obtained by FEM and published literatures.

• 한국운동역학회지
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• 제24권3호
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• pp.229-238
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• 2014

This study comparatively analyzed the speed and segment coordination characteristics of Taekwondo hand techniques, while different attention focusing strategies were utilized. Ten elite Taekwondo poomsae athletes participated, and three different strategies (no focus, target focus, body focus) were utilized in random order. The hand velocity and upper body segment coordination characteristics were analyzed, with the following results. First, the maximum magnitudes of the hand velocity differed between the focus conditions for the Araenaereomakgi and Momtongjireugi techniques. Second, the angular velocity and kinetic energy transfer patterns of the segments differed between the focus conditions, and in the case of the body focus condition, the movement was more correct according to the theory. Third, the shoulder and elbow joint coordination patterns differed between the focus conditions, with more efficient movement shown with the body focus condition. In conclusion, we confirmed the potential of effectively using an attention focusing strategy in a taekwondo teaching situation. However, the effect on the movement coordination and results of the movement could be changed by a difference in the cue provided or the type of the task. In addition, depending on the task, the attention focusing strategy could affect the efficiency of the movement. Therefore, coaches and masters of Taekwondo will have to constitute determine the appropriate attention focusing cues based on the task.

• 한국해양공학회지
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• 제31권5호
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• pp.340-345
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• 2017

It is important to predict the hydrodynamic maneuvering derivatives, which consist of the forces and moment acting on a hull during a maneuvering motion, when estimating the maneuverability of a ship. The estimation of the maneuverability of a ship with a change in the stern hull form is often performed at the initial design stage. In this situation, a method that can reflect the change in the hull form is necessary in the prediction of the maneuverability of the ship. In particular, the linear hydrodynamics maneuvering derivatives affect the yaw checking motion as the key factors. In the present study, static drift calculations were performed using Computational Fluid Dynamics (CFD) based on Reynolds Average Navier-Stokes (RANS) for a 40-segment hull. A prediction method for the linear hydrodynamic maneuvering derivatives was proposed using the slender body theory from the distribution of the lateral force acting on each segment of the hull. Moreover, the results of a comparison study to the model experiment for KVLCC1 performed by KRISO are presented in order to verify the accuracy of the static drift calculation. Finally, the linear hydrodynamic maneuvering derivatives obtained from both the model test and calculation are compared and presented to verity the usefulness of the method proposed in this study.

• 한국운동역학회지
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• 제19권1호
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• pp.77-85
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• 2009

본 연구는 배드민턴 드라이브 동작의 원리와 현상을 이해함은 물론 운동 시 정확한 동작을 유도하여 상해예방 및 기술향상을 기할 수 있도록 기초자료를 제공하고자 하였다. 라헤드의 이동변위는 모든 연구대상자들에게서 비슷한 패턴으로 나타났지만 다소 차이가 나타난 이유로는 신장, 상완과 전완의 길이, 스윙괘적의 개인적인 성향의 등 외부적인 요인에 의한 결과로 사료된다. 국면별 상지관절의 각도를 살펴보면 어깨 관절, 팔꿈치 관절, 손목 관절의 각도는 드라이브 동작을 수행함에 있어 서로 유기적인 관계로 얽혀 있으며 근위에서 원위로 힘의 전달을 한다는 분절 순서이론도 뒷받침하고 있다. 상지관절의 각속도는 연구대상자 모두에서 임팩트 이후 팔로우스루 동작에서도 크게 나타났는데 이는 배드민턴과 같은 라운동에서 팔로우스루의 중요도를 나타내는 것을 의미한다. 이 팔로우스루 동작은 자세의 안정성 유지, 동작의 자세교정, 관절의 상해예방이라는 측면에서 라운동 시 중요요소로 작용하고 있음을 보여주고 있다. 종합해보면 분절의 순서이론에 따른 스윙이 이루어져야 효율적인 동작을 할 수가 있을 것으로 판단된다.

• Bulletin of the Korean Chemical Society
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• 제12권2호
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• pp.170-177
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• 1991

A lattice mean field theory is developed to investigate the conformational properties of monolayer amphiphiles at the air-water interface. By generalizing Dill and Cantor's method and by extending Whittington's recurrence equation, we derive the supermatrix recurrence equation which is applied to calculation of various segment density profiles and order parameter, etc. In deriving the equation, we incorporated the chain stiffness effect and the chain connectivity which are distinguished features of linear chain molecule. Our result shows that, as the surface coverage $\sigma$ increases the chain ordering process with respect to vertical axis of the lattice system becomes dominant.

• 시큐리티연구
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• 제36호
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• pp.177-200
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• 2013

빈부 격차가 커지는 고도 산업사회의 진입에 따라 인간의 안전에 대한 요구와 욕구는 양적인 급속한 팽창과 함께 다양화 되고 고급화 되고 있다. 따라서 민간 경호경비 산업분야의 시장 전망은 매우 밝을 것으로 예상된다. 그러나 우리나라 민간 경호경비업체는 영세할 뿐만 아니라 경영 전략적 사고의 부족으로 새로운 시장기회를 확보하기 위한 전략적 방향성을 찾는 것에 어려움을 겪고 있다. 따라서 우리는 경영전략 이론을 바탕으로 구조화된 의사결정 방법인 AHP 방법을 활용하여 우리나라 민간경호 산업의 발전 방향을 제시하고자 한다. 자원기반 이론은 경영전략 이론의 중요한 이론 중에 하나로 기업의 성과는 기업이 가지고 있는 독특한 자원에 의해 결정된다는 이론이다. 자원기반 이론을 적용하여 기업의 전략적 방향을 설정할 수 있는데, 그 방법은 기업이 가지고 있는 독특한 자원과 핵심역량을 분석하고, 이를 반영하여 기업의 전략적 방향을 설정하는 것이다. 이 방법과 이론은 1990년대 이후 그 유용성이 실증적으로 많이 검증이 되어왔다. 우리는 자원기반 이론을 활용하여 민간 경호경비 기업의 경영전략을 수립하기 위한 기본 절차를 수립하고 그 전략적 방향을 정립하였다. 우리는 민간 경호경비 기업의 공공기관과 대비한 경쟁력 있는 자원, 핵심 역량, 전략을 추출 위해서 AHP 방법을 사용하였다. AHP 방법론은 비구조화 된 문제를 전문가의 지식을 계량화하여 의사결정에 이용하는 방법이다. 이 방법은 학술적 연구는 물론 실제 기업 내에서의 많은 경영의사결정 문제를 수행하여 그 유용성이 검증된 방법이다. 우리는 이를 위해 학계, 업계, 연구계의 전문가 11인에게 데이터를 확보하였고, 이를 통해 민간 경호경비 기업이 공공기관과 대비하여 차별적인 자원, 역량, 그리고 전략적 방향성을 도출하였다. 우리는 이를 통해 민간 경호경비 기업의 공공기관과 차별화된 자원은 무형자원이며 그 중에서도 특히 관계자원, 고객정보자원, 기술자원 등이 중요한 자원으로 분석되었다. 반면, 설비자원, 재무자원, 유통망자원 등 유형 자원은 상대적으로 부족한 것으로 분석되었다. 또한 핵심역량으로는 마케팅 및 영업역량과 신제품 개발역량이 중요한 역량으로 분석되었다. 그리고 이러한 자원과 역량을 고려한 전략적 자원으로는 특정 시장에 집중하는 집중화 전략이 채택되었다. 집중화 전략은 특정고객에 집중하여 총력적으로 마케팅활동을 통해 수익을 창출하는 전략으로 규모가 작은 중소기업에 적합한 전략이다. 따라서 민간 경호경비 기업은 새로운 시장을 개척하고 이에 적합한 상품을 개발하며 고객과의 지속적인 마케팅활동을 하는 것이 매우 중요한 과제라 하겠다. 또한 장기적으로 민간 경호경비 기업의 마케팅 역량 강화를 위한 인적인 보강도 지속적으로 요구된다.

• Wind and Structures
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• 제26권1호
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• pp.45-56
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• 2018

Wind damage of urban trees arises to be a serious issue especially in the typhoon-prone areas. As a family of tree species widely-planted in Southeast China, the structural behaviors of Plane tree is investigated. In order to accommodate the complexities of tree morphology, a fractal theory based finite element modeling method is proposed. On-site measurement of Plane trees is performed for physical definition of structural parameters. It is revealed that modal frequencies of Plane trees distribute in a manner of grouped dense-frequencies; bending is the main mode of structural failure. In conjunction with the probability density evolution method, the fragility assessment of urban trees subjected to wind excitations is then proceeded. Numerical results indicate that small-size segments such as secondary branches feature a relatively higher failure risk in a low wind level, and a relatively lower failure risk in a high wind level owing to windward shrinks. Besides, the trunk of Plane tree is the segment most likely to be damaged than other segments in case of high winds. The failure position tends to occur at the connection between trunk and primary branches, where the logical protections and reinforcement measures can be implemented for mitigating the wind damage.

• Journal of Smart Tourism
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• 제3권2호
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• pp.23-36
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• 2023

Due to the phenomenon of aging, a new consumer segment known as the "new-silver generation" is emerging. Unlike the previous silver generation, this generation possesses significant economic power and consuming willingness, attracting attention from consumer goods companies. However, both the new-silver generation and the elderly face challenges in adopting contactless or self-service technologies such as self-order kiosks, resulting in negative reactions. Therefore, this study aims to investigate the attitude and response of the newsilver generation towards kiosks, as well as the factors influencing their resistance to such technology. By applying theoretical perspectives from the innovation resistance model, technostress theory, and the value-based model, this study identifies influencing factors for innovation resistance among the new-silver generation when using contactless technologies implemented in fast-food restaurants. The findings indicate that a lower awareness of new technologies and services corresponds to decreased adoption resistance, while a higher perceived value leads to more positive behaviors and attitudes among the new-silver generation utilizing kiosks at fast-food restaurants.

• 영어어문교육
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• 제1호
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• pp.21-42
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• 1995

The purpose of this study is to point out that the segment-based study on child phonological acquisition is not sufficient in accounting for the ever-changing dynamic development of child phonology and to attempt to explain child phonology in terms of syllable-based theory of phonology, one of various types of non -linear phonology which have been studied since the late 1970's. According to Gruber's observation. it is obvious that children perceive their own concept of syllable even at the early stage of babbling. In addition, the statistical data show that the CV-type syllable is most frequently used in child phonology. These evidences seem to suffice to conclude that the CV-type syllable is the most unmarked of all four core syllable types in the sense of Clements & Keyser(1983). Starting with this observation, it is further argued that in child phonology the markedness of syllable types increases in the order of CV, CVC, VC and V.