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A key engine for the growth of the culture industry can be found at the development of specialized strategic products. For Korea's southwestern coastal area, where Mokpo takes a central position, the possibility of such products may be found from culture-related islands and their marine resources. Among the many candidates, the theme of ocean heroes may be the most powerful asset to increase its cultural competitiveness via its potential for global recognition. In this thesis, I have tried to find new possibilities for the area's specialized strategic industry by focusing on the Ocean's Worldwide Heroes Park, an amusement park planned from such a viewpoint. Planned according to the necessity to promote public awareness of the value of ocean, the Ocean's Worldwide Heroes Park aims to raise a “global workforce” through the discovery of the latent maritime assets in Korea and achieve commercial success as a theme park. What is noteworthy regarding the plan is that the world's ocean heroes are divided into three categories: (a) the heroes who pioneered the world oceans, (b) the heroes who guarded the oceans during the wars, and (c) the heroes in history and folk tales. Also, the park is divided into six zones each of which offers an opportunity to experience an encounter with ocean heroes of the world. As for the exhibitions and productions, content and stories are regarded as more important than other elements, and ‘imagineering' more essential than engineering. Considering that the development of content is a crucial factor for the success of the park, I concluded that even the first step of planning should progress side by side with the effort to develop visual content and characters. The development of content focused on the world's ocean heroes and the local culture of the Korea's southwestern region could lead to the birth of creative and globally competitive cultural products. 베트남의 국제항구 Van Don : 베트남 영토의 북동부와 남서부에는 두 개의 만이 있다. 이 지역은 지리적, 경제적, 전략적으로 상당히 중요한 의미를 갖는다. Tonkin만이 동남아시아지역에서 역사적, 문화적, 경제적으로 중요한 의미를 지니는 반면, Thailand만은 동남아시아의 많은 나라들뿐만 아니라 인도와 서아시아 지역의 많은 나라들과 연관되어 있다. Tonkin만은 126,250㎢의 면적을 가지는 동남아시아의 가장 큰 만 중의 하나로 동부해의 중요한 지역이다. Tonkin만의 경제적, 환경적, 문화적 잠재력을 HaLong의 해양문화를 널리 알리는데 공헌했다. Ha Long문화와 함께 DongSon문화는 외부의 다른 세계들과 밀접한 연관성을 지니는데, 특히 중국의 동남부지역과 일본의 RyuKyu와 Kyushu군도, 동남아시아의 여러 나라의 해양문화와 긴밀한 관련을 갖는다. 반면에 기원 이후 상품을 교환하거나 전도를 목적으로 상인들과 선교사들이 GiaoChau로 들어왔고, 중국문명과 인도문명이 만나는 교량지점으로 번성해 나갔다. 1149년에 Ly Anh Tong은 외국 상인들과의 교역을 목적으로 Van Don을 건설했고, 그 이후 Van Don은 선박과 상품을 점검하기 위한 항구로서 지리적 방어 지역으로 항구로서의 입지를 탄탄히 하며 베트남의 중요한 국제무역항이 되었다. Ly, Tran 그리고 Le왕조에 이르기까지 Van Don은 많은 인구를 가진 생산활동이 활발한 역사적, 종교적 체계를 갖춘 지역으로 7세기 동안 여러 왕조의 상당한 관심을 끌었던 번성한 자주독립체였다. Van Don은 역사상 가장 오래된 무역항이며, 해안이나 강가에 위치한 Van Ninh, Mong Cai, Cat Ba, Yen Hung 등의 항구와 Red River삼각주와 중국 동남부지역의 전통적인 수공예 마을들과 밀접한 연관성을 가지고 있다. 역사적 고고학적 자료에 근거하여 이 논문은 역사적으로 중요한 항구들의 특징들을 체계화하고 Van Don지역의 국가적, 국제적, 경제적 활동과 그 역할을 분석하는데 중점을 두고자 한다.
There are two subspecies Apis cerana in Viet Nam, A. c. cerana and A. c. indica. Subspecies A. c. cerana distributes on Dong Van plateau, Ha Giang province in the North of Viet Nam and A. c. indica distributes in the rest areas of the country. In this paper we conducted to hybridize between virgin queen A. c. cerana in Dong Van (D) with drones A. c. indica in Ha Tay (H) and in Yen Bai (Y). Some biological characteristic of two hybrids Dong Van - Ha Tay (DH) and Dong Van - Yen Bai (DY) were studied from May to December, 2011 in Ha Tay and Son La provinces of Viet Nam. The results initially showed that egg-laying capacity of DH was 570±76 eggs/24h and DY was 572±70 eggs/24h while of these in control H was only 511±69 eggs/24h. The inbreeding rate of DH and DY were 3.71 and 2.85% respectively lower than these of D (8.11%) and H (7. 65%). Honey yields (a floral season) of DH and DY were 10.41±2.18kg/colony and 10.85±2.06kg/colony respectively, exceeded control H (8.58±1.52kg/colony) from 21.33 to 26.46%.
In this paper, a modified sliding mode control is proposed to stabilize a class of large-scale systems with mismatched uncertainties, unknown exogenous disturbances and without the measurements of the states. Based on the Lyapunov method, appropriate linear matrix inequality stability conditions are derived to guarantee the stability of the system. Then, a modified adaptive sliding mode control law is proposed to guarantee the finite time reachability of the system states by using output feedback only. Final, a double-inverted pendulums system connected by a spring is simulated to demonstrate the efficacy of the proposed method.
Van,Nguyen,,Huy,Tran,,Hieu,Trung,Khuong,,Long,Quynh,Van,Nguyen,,Thanh,Ho,,Na,Thi,Nhi,Dao,,An,Thi,Minh,Van,Hoang,,Minh The Korean Society for Preventive Medicine 2020 Journal of Preventive Medicine and Public Health Vol.53 No.4
Objectives: Although the World Health Organization (WHO) initiative "My 5 Moments for Hand Hygiene" has been lauded as effective in preventing hospital-associated infections, little is known about healthcare workers (HCWs)' hand hygiene behavior. In this study, we sought to assess knowledge and attitudes towards the concepts in this initiative, as well as associated factors, among Vietnamese HCWs at a general hospital. Methods: A structured questionnaire was administered to HCWs at a central Vietnamese general hospital in 2015. Multiple logistic regression analysis was used to identify factors associated with HCWs' knowledge and attitudes towards hand hygiene. Results: Of 120 respondents, 65.8% and 67.5% demonstrated appropriate knowledge and a positive attitude, respectively, regarding all 5 hand hygiene moments. Logistic regression indicated better knowledge of hand hygiene in workers who were over 30 years old, who were direct HCWs (rather than managers), who had frequent access to clinical information, and who received their clinical information from training. Those who worked in infectious and tropical disease wards, who had frequent access to clinical information, and who received information from training were more likely to have a positive attitude towards hand hygiene than their counterparts. Conclusions: Although many Vietnamese HCWs displayed moderate knowledge and positive attitudes towards the WHO hand hygiene guidelines, a key gap remained. Regular education and training programs are needed to increase knowledge and to improve attitudes and practices towards hand hygiene. Furthermore, a combination of multimodal strategies and locally-adapted interventions is needed for sustainable hand hygiene adherence.
A high-efficiency active cell-to-cell balancing circuit for Lithium-Ion battery modules is proposed in this paper. By transferring the charge directly from the highest voltage cell to the lowest voltage cell using an LLC resonant converter designed to achieve zero-voltage switching (ZVS) and nearly zero-current switching (ZCS) for all of the primary switches and zerovoltage zero-current switching (ZVZCS) for the diodes in the secondary, the proposed topology can achieve a high efficiency and a fast balancing speed with a simple control and design. In order to show the improved performance of the proposed method, a prototype circuit was built with a battery module having twelve Lithium-Ion (Li-Ion) batteries. Experimental results are presented to verify the shorter balancing time and higher efficiency of the proposed method when compared with conventional methods. The measured time for the balancing of the twelve cells was 47 min and a maximum efficiency of 94.5% was achieved at 1.5 W.
This paper proposes a new single phase variable structure control (SPVSC) for mismatched uncertain systems. A new sliding mode without reaching phase is designed to address two most important problems in the variable structure control area: 1) the system states are in sliding mode at the initial time movement; and 2) using only output variables directly. First, a new sufficient condition in terms of linear matrix inequality is derived such that the existence of a sliding surface guarantees asymptotic stability of the sliding mode dynamics from the initial time instant. Second, a static output feedback SPVSC law is designed to force the system states to stay in the sliding surface from beginning to end. Final, the lateral motion of a B-26 aircraft is simulated to demonstrate the advantages and effectiveness of the proposed SPVSC scheme.
This paper concentrates on the design and construction aspects of a transmission for a mid-class passenger car with internal combustion engine. The transmission, consisting of a Continuously Variable Transmission (CVT) with a Van Doorne V-belt, a planetary gear set and a compact steel flywheel is used to prove the concept of mechanical torque assist. The design goal is to obtain a proof of concept transmission with maximal efficiency, using proven transmission technology. With the developed so called Zero Inertia CVT, the fuel economy of the car is improved by operating the engine at its fuel optimal operating line. To achieve a good vehicle acceleration response, the flywheel assists the powertrain mechanically.
Since flexible adhesives are used more and more in structural applications, designers should have a better understanding of its behaviour under various conditions as ultimate load, fatigue load, long-term load and environmental conditions. This paper focuses on long-term load conditions and its effect on flexible adhesives. The creep properties of both PU (PolyUrethane) and SMP (Silyl Modified Polymers) adhesives used for identical applications are considered. To investigate the creep behaviour tests under various conditions were done. The results of those tests are presented and compared. To evaluate these results an empirical method is proposed and discussed. An example illustrates the potential of this method. It is also shown that with use of a probabilistic calibration technique this method results into a simple rule, which can be used to calculate the creep for practical applications. For the studied adhesives, the creep performance of the SMP adhesive is shown to be of the same level or slightly better than of the two PU adhesives. In addition to this empirical method, the principles of a more complex theoretical based method are introduced. The potential of this method is illustrated and future research activities are drawn.
The main objective of this research study is the performance evaluation of 40/50 and 60/70 binder for asphalt mixtures in Vietnam. To accomplish the objective of this research, a dense gradation with nominal maximum aggregate size of 19.0mm is used for the asphalt mixtures. Marshall Stability (MS) test, Tensile Strength Ratio (TSR) test, Wheel Tracking (WT) test, and Dynamic modulus test are conducted to evaluate the rutting and cracking performance of 40/50 and 60/70 binder in asphalt mixtures. It was found that the Marshall stability of asphalt mixtures using 40/50 binder is about 12% higher than asphalt mixtures using 60/70 binder while the rutting resistance of the mixtures with 40/50 binder shows 2.5 times higher than 60/70 binder at 15,000 load cycles. Moreover, the TSR of asphalt concrete using 40/50 binder and 60/70 binder are approximately 95% and 79%, respectively which means that using 40/50 binder is very good for moisture damage resistance. Finally, the dynamic modulus test was done at a reference temperature of 20oC and frequency of 1,0Hz. The dynamic modulus of asphalt mixture with 40/50 binder is about 6257 MPa, which is two times higher than asphalt mixture using 60/70 binder. Based on the results of this study, it can be concluded that asphalt mixtures using 40/50 binder can improve the rutting and moisture damage resistance of asphalt concrete under high temperatures and moisture conditions significantly. It is noted that these conclusions were based on only on a limited number of samples and conditions. Further studies must be conducted to investigate the effect of 40/50 binder on fatigue cracking of asphalt pavement in the field.
Two new naphthalene diglucosides named nepenthosidesA (1) and B (2), together with eleven knowncompounds (3–13), were isolated from the carnivorousplant Nepenthes mirabilis. The structures of these compoundswere elucidated based on extensive spectroscopicanalysis, including 1D- and 2D-NMR, and MS. The antioxidantactivities of compounds 1–13 were evaluated interms of their peroxyl radical-scavenging (trolox equivalent,TE) and reducing capacities. All isolates showedperoxyl radical-scavenging and reducing activities at concentrationsof 1.0 and 10.0 lM. Anti-osteoporotic activitieswere investigated using murine osteoclastic RAW 264.7cells. Compounds 1–7 and 9–12 significantly suppressedtartrate-resistant acid phosphatase activity down to91.13 ± 1.18 to 42.39 ± 1.11 %, relative to the control(100 %) in nuclear factor-jB ligand (RANjL)-inducedosteoclastic RAW 264.7 macrophage cells.