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본 논문은 항공기 탑재 능동위상배열레이더 연구시제 개발에 적용된 자원관리 주요 알고리즘의 설계 내용과, 이를 반영한 시뮬레이터의 내용에 대해 기술하였다. 또한, 설계된 자원관리 알고리즘을 항공기 탑재 능동위상배열 레이더 시스템에 적용하여 동시 표적 추적 및 탐지 결과에 대한 요구성능이 만족됨을 확인하였다. This paper deals with a design of radar resource management algorithms and simulator implemented main algorithms for development of airborne AESA(active electronically scanned array) radar. In addition, evaluation results show that developed radar system satisfies a main requirement about simultaneous multiple target tracking and detection by adopting proposed algorithms.
n this study, a design procedure for the practical application of the dampers to building structures under earthquake loads was presented by using earthquake response spectrum. Nonlinear time history results using a 10 story building structure installed with damper verified the effectiveness of the proposed procedure by showing that the structural response could be reduced to the target performance level for seismic loads. Since the proposed design procedures are based on response spectrum seismic analysis result of the original structure, the capacity, location and the number of damper and the consequent response reduction effects can be preliminarily determined without performing the nonlinear time history analysis.
In the globalization era. menstruation is now at the point of discussing ‘menstruation as human rights’ as a global human rights norm and development agenda. In the global society in the mid-2000s, the menstruation problem was not addressed in the debate on feminism and reproduction rights movement, nor in the goal of sexual and reproductive health and rights in global development, but in the irony of sustainable environmental goals in the issue of water, hygiene and sanitation. The purpose of this study is to analyze the meaning and limitations of menstrual discourse produced by the subjects of menstrual hygiene management through the menstrual hygiene day campaign and research report. It examines how menstrual reality, including the global menstrual taboo and menstruation statistics, in the underdeveloped regions of Asia is represented and how global human rights norms support the menstrual hygiene discourse. This suggests that women’s menstrual experience is extended to the feminist agenda of gender and reproductive rights in order to become a menstrual human right, beyond limiting menstrual problems to hygiene sanitation and health development agendas. 지구화 시대 월경은 이제 글로벌 인권 규범과 개발 의제로서 ‘인권으로서 월경’을 논하는 시점에와있다. 2000년대 들어서 새천년을 맞이한 글로벌 사회에서 월경 문제는 페미니즘 논의와 운동에서 오래된 재생산권리의 이슈나 글로벌 개발에서의 성재생산건강권의 목표에서가 아니라, 아이러니하게도 지속가능한 환경 목표에서 물과 위생의 문제에서 다뤄지기 시작했다. 본 연구는 월경위생담론이 본격적으로 등장한 배경을 살펴보고, 월경위생의 날 캠페인과 물과 위생 개발 연구보고서를통해 개발 주체들이 생산하고 있는 월경위생 관리 담론을 분석한다. 글로벌 월경금기, 월경 통계를포함하여 특히 아시아의 낙후한 저개발 지역의 월경 현실을 어떻게 드러내고 있는지, 글로벌 인권규범이 월경위생 담론을 어떻게 뒷받침하고 있는지를 주요하게 살펴본다. 이에 월경 문제를 위생과보건의 개발 의제로 제한하는 한계를 넘어서, 여성의 월경 경험이 월경인권으로 자리하기 위해서는젠더와 성재생산건강권리의 여성주의 의제로 확장되어 한다는 점을 제언한다.
In this study, the effectiveness of a multi-action hybrid damper (MHD) composed of lead rubber bearing (LRB) and friction pad was verified in terms of seismic performance improvement of a frame structure. The LRB and the friction elements are connected in series, so the LRB governs the intial small deformation and the friction determines large deformation behavior. Cyclic loading tests were conducted by using a half scale steel frame structure with the MHD, and the results indicated that the structure became to have the stable trilinear hysteresis with large initial stiffness and first yielding due to the LRB, and the second yielding due to the friction. The MHD could significantly increase the energy dissipation capacity of the structure and the hysteresis curves obtained by tests were almost identical to the analytically estimated ones.
In this paper, time and frequency domain characteristics of Gyeong-ju earthquakes were investigated, and nonlinear time history analyses were conducted for bi-linear hysteretic structures excited by short-duration ground accelerations. Previous studies showed that larger inelastic displacements than the peak displacement of the corresponding elastic system were observed especially for the structures with structural period shorter than 0.3s, and the similar results could be obtained when long-duration ground accelerations were used as excitation loads. For the short-duration earthquakes, however, the inelastic displacements were not so large and almost identical to the peak elastic displacements.
Purpose: Intra-arterial revascularization therapy (IART) for acute ischemic stroke has become increasingly popular recently. However, early change in apparent diffusion coefficient (ADC) values after full recanalization in human stroke has not received much attention. The aim of this study was to evaluate ADC changes immediately after interventional full-recanalization in patients with acute ischemic stroke. Materials and Methods: ADC values of 25 lesions from 18 acute ischemic stroke patients were recorded with both pre- and post-recanalization ADC maps. Measurement was done by placing region of interests over the representative images of the lesion. For analysis, lesions were divided into territorial infarction (TI) and watershed infarction (WI). Results: Mean ADC values of the overall 25 lesions before IART were 415.12 × 10-6 mm2/sec, and increased to 619.08 × 10-6 mm2/sec after the IART. Average relative ADC (rADC) value for 22 TI increased from 0.59 to 0.92 (p < 0.000), whereas, average rADC value for 3 WI did not change significantly. Conclusion: There was a conspicuous increase of ADC values immediately after full-recanalization in TI lesions. On the other hand, WI lesions did not show significant change in ADC values after recanalization.
In this study, natural period formular is presented for a RC shear wall structure with H-, T-, and L-shaped wall sections. The natural period formular proposed by Goel and Chopra and adopted in ASCE 7-10 was modified by using the ratio of the flange and web wall area. The natural periods of structures with H-shaped wall were numerically obtained, the results indicated that the ASCE 7-10 could not consider the natural period variation according to the length of the flange wall, but the proposed formula could do. Especially, ASCE 7-10 estimated much longer periods than eigenvalue analysis, and this implies that conservative seismic design is difficult. The periods by eigenvalue analysis exist between the upper and lower bounds given by the proposed formula, and conservative design is possible by using the proposed lower bound value. In order to verity the effectiveness of the proposed method, actual residential buildings with various types of flange walls are considered. Ambient vibration tests, eigenvalue analyses, and nonlinear dynamic analyses were conducted and the periods were compared with the values by ASCE 7-10 and the proposed formula. The results showed that the proposed formula could estimate more accurately the periods than ASCE 7-10.
Liposomes have demonstrated great potentials as protein carriers in various pharmaceutical applications. However, low loading amount of proteins in liposomes have been a major challenge for maximizing the therapeutics potential of the proteins. We thus aimed to enhance the loading amount of a model protein, lysozyme, in liposomes by controlling key experimental variables of a reverse phase evaporation method. The loading amount of lysozyme in liposomes was evaluated with changing type of organic solvents used, weight ratio of lysozyme/phosphatidylcholine, and volume ratio of aqueous to organic phase along with particle characterization before and after freeze-drying procedure. As a result, the loading amount of lysozyme in liposomes was considerably enhanced and the physical stability of the liposomes was maintained without any significant changes in the particle characteristics for 7 days. The findings of this study would be useful for highly efficient loading of protein therapeutics in liposomes, leading to improved therapeutic effects of the drugs.
In this study, a new type of rotary friction damper was proposed for the seismic retrofitting of building structures. The rotary friction damper was composed of 2 rotary friction pads, 3 steel plates, and 9-13 bolt holes. The clamping forces can be modulated for realizing the various yield moment of the damper. The test results indicated that the proposed damper showed stable hysteretic behavior and the designed yield moment could be obtained according to the applied torque and the number of bolt holes. Numerical analyses of a moment-frame retrofitted with the proposed dampers should that the seismic performance could be enhanced according to the yield moment of the dampers.
A surgery consent form is a document that provides the patient with overall information on the surgical treatment involved and shows that he or she is giving an informed consent based on such information. This study analyzes the use of the medical terminology and the textual forms in Korean-into-English translation of surgery consent forms in the light of the genre conventions of the source and target cultures. This study chooses three sets of texts: Korean surgery consent forms (STa/STb), English translations of the Korean surgery consent forms (TTa/TTb), and surgery consent forms originally written in English (STe). This paper centers upon the level of difficulty of the medical terminology used in the texts and the variations in the formal aspect of the surgery consent forms. The findings of this study are as follows: First, there are variations between STa/STb and TTa/TTb, and between TTa/TTb and STe in the use of professional terminology, and the textual form. The level of difficulty of the terminology used in TTa/TTb has been found to be generally higher than that of the terminology in STe. Second, unlike the STa/STb and TTa/TTb that emphasize the expository aspect of the text by omitting the party who gives the surgical treatment involved and the party who receives it, STe frequently mentions the two parties explicitly as the sentential subject before asking for a consent. To target receivers who are used to both the target culture and the target language, and who have no knowledge of the professional terminology, the surgery consent forms may be difficult to understand. For this reason, when a text that belongs to a genre whose conventions are different in the two cultures involved, the target text needs to be produced in accordance with the textual conventions of the target culture, not the source culture.