• 한국ITS학회 논문지
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• 제4권1호
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• pp.81-88
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• 2005

최근 실시간 교통정보제공이 가능해지고, 사용자간의 커뮤니케이션이 활발해짐에 따라, 사용자간의 협력이 가능해질 것으로 보인다. 만약 이런 상황이 현실화된다면, 사용자간의 비협력을 전제로 하는 Wardrop 의 경로선택원리는 수정이 필요하며, 사용자간의 협력을 균형원리에 포함시킬 필요가 있다. 즉, 사용자간의 협력하에서 경로를 선택하는 원리를 새롭게 정의해야 한다. 본 연구에서는 교통정보를 통해 운전자간의 협력이 가능한 교통망 상황하에서 운전자의 경로선택기준을 제시하는 데 목적이 있다. 이를 Wardrop의 사용자균형(Wardrop User Equilibrium)과는 달리 협력적 사용자균형(Cooperative User Equilibrium)으로 정의하며, 몇 가지 예제를 통하여 이들 두 개의 사용자 균형상태를 분석한 결과, 협력적 균형상태가 Wardrop의 균형상태 보다 더 좋은 해를 찾을 수 있음을 확인할 수 있었다.

• Korea-Australia Rheology Journal
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• 제15권3호
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• pp.109-115
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• 2003

Rheometry testing and the DSC measurement of five thermotropic liquid crystalline polymers (TLCP) have been carried out. The dynamic viscosities of the five TLCPs show a typical shear-thinning behaviour obeying the power-law with the power indices from 0.2 to 0.3. When these TLCPs are heated above the melting temperatures determined by the DSC measurements, the dynamic viscosities first rapidly decrease by 2～3 orders of magnitude then level off, finally increase gradually with the further increasing of temperature. The steady shearing exhibited the same behaviour as the dynamic shearing, but serious edge fracture of material slippage out of the plates occurred. The abnormal temperature dependence of the viscosities can be explained by the nematic-isotropic transition. By using the concept of activation energy, we propose a simple model which can fit the shear-thinning behaviour quite well and predict qualitatively correct temperature effects.

• Journal of Dairy Science and Biotechnology
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• 제17권1호
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• pp.39-49
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• 1999

Since IMF relief financing, domestic economy has been rapidly cooled down. At this point that we predict an overall decrease of production and sale of industries, cooperative marketing activities of the whole dairy industry are required to promote milk consumption. As everyone knows, advertisement is only one of the various factors that affect sales. Other factors include price, distribution, package, promotion, and consumer's needs and taste. The objectives of the cooperative advertising campaign should be trial purchase of new consumers, maintenance of brand loyalty of existing consumers, more positive experience of using the product, and increase of frequency of purchase. Long term analysis is essential to making these kinds of behaviour changes. Also the objectives of the communication program should be a shift of awareness of milk from 'a basic health food for children' to a substitute to the beverage even for adults. To share database of consumers among companies, we need to find ways to use interactive on-line services, the internet, D.M. events and so on as well as the mass media. It should be a precondition that the main body of the cooperative advertisement includes the milk processing board, dairy companies, livestock cooperations, farmers and the Government. To assure continuous, activities to promote milk consumption, the Government should take the lead in legislating 'An enforcement ordinance for milk promotion and research', and seek complementary measures and support to establish the ordinance.

• Nuclear Engineering and Technology
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• 제53권9호
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• pp.2816-2829
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• 2021

Decay heat residuals of spent nuclear fuel (SNF), i.e., the differences between calculations and measurements, were obtained previously for various spent fuel assemblies (SFA) using the Polaris module of the SCALE code system. In this paper, we compare decay heat residuals to their uncertainties, focusing on four PWRs and four BWRs. Uncertainties in nuclear data and model inputs are propagated stochastically through calculations using the SCALE/Sampler super-sequence. Total uncertainties could not explain the residuals of two SFAs measured at GE-Morris. The combined z-scores for all SFAs measured at the Clab facility could explain the resulting deviations. Nuclear-data-related uncertainties contribute more in the high burnup SFAs. Design and operational uncertainties tend to contribute more to the total uncertainties. Assembly burnup is a relevant variable as it correlates significantly with the SNF decay heat. Additionally, burnup uncertainty is a major contributor to decay heat uncertainty, and assumptions relating to these uncertainties are crucial. Propagation of nuclear data and design and operational uncertainties shows that the analyzed assemblies respond similarly with high correlation. The calculated decay heats are highly correlated in the PWRs and BWRs, whereas lower correlations were observed between decay heats of SFAs that differ in their burnups.

• Journal of Dental Anesthesia and Pain Medicine
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• 제20권1호
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• pp.1-8
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• 2020

Behaviour management and dental procedures performed in very young, pre-cooperative, highly anxious, or medically disabled children are challenging tasks. Various drugs and methods have, however, been introduced to facilitate treatment for this patient population. Midazolam is a benzodiazepine used as an adjunct to behavior management techniques in the dental treatment of pediatric patients. Midazolam can be used as a safe and effective drug for conscious sedation, general anesthetic premedication, and treatment of seizures during dental procedures. Nevertheless, further research involving pediatric patients would be beneficial.

• 기본간호학회지
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• 제23권2호
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• pp.126-135
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• 2016

Purpose: This study was done to identify the influence of clinical learning environment and attitude toward physician-nurse collaboration on professionalism in nursing students. Method: The sample consisted of 317 nursing students. Data were collected from October 10 to December 20, 2014 and were analyzed using t-test, ANOVA, Pearson correlation and multiple linear regression with IBM SPSS statistics version 19. Results: The mean score for clinical learning environment was 3.15 out of 5. The mean score on the Jefferson scale attitude toward physician-nurse collaboration (JSAPNC) was 3.31 out of 4. The mean score for professionalism was 3.70 out of 5. The predictors of professionalism were major satisfaction, 'care vs cure' for the JSAPNC and 'patient relationship', 'student satisfaction' for clinical learning environment. Conclusions: Based on these results, educational programs to improve attitude toward physician-nurse collaboration and clinical learning environment should be developed.

• Journal of Communications and Networks
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• 제17권2호
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• pp.162-171
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• 2015

This paper provides an analytic performance evaluation of the bit error rate (BER) of underlay decode-and-forward cognitive networks with best relay selection over Rayleigh multipath fading channels. A generalized BER expression valid for arbitrary operational parameters is firstly presented in the form of a single integral, which is then employed for determining the diversity order and coding gain for different best relay selection scenarios. Furthermore, a novel and highly accurate closed-form approximate BER expression is derived for the specific case where relays are located relatively close to each other. The presented results are rather convenient to handle both analytically and numerically, while they are shown to be in good agreement with results from respective computer simulations. In addition, it is shown that as in the case of conventional relaying networks, the behaviour of underlay relaying cognitive networks with best relay selection depends significantly on the number of involved relays.

• Steel and Composite Structures
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• 제37권3호
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• pp.273-289
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• 2020

Due to the unique construction method of modular steel buildings (MSBs) with units prefabricated fully off the site and assembled quickly on the site, the inter-module connection for easy operation and overall performance of the system were key issues. However, it was a lack of relevant research on the system-level performance of MSBs. This study investigated the seismic performance of two-storey modular steel structure with a proposed vertical rotary inter-module connection. Three full-scale quasi-static tests, with and without corrugated steel plate and its combination, were carried out to evaluate and compare their seismic behaviour. The hysteretic performance, skeleton curves, ductile performance, stiffness degradation, energy dissipation capacity, and deformation pattern were clarified. The results showed that good ductility and plastic deformation ability of such modular steel structures. Two lateral-force resistance mechanisms with different layout combinations were also discussed in detail. The corrugated steel plate could significantly improve the lateral stiffness and bearing capacity of the modular steel structure. The cooperative working mechanism of modules and inter-module connections was further analyzed. When the lateral stiffness of upper and lower modular structures was close, limited bending moment transfer may be considered for the inter-module connection. While a large lateral stiffness difference existed initially between the upper and lower structures, an obvious gap occurred at the inter-module connection, and this gap may significantly influence the bending moments transferred by the inter-module connections. Meanwhile, several design recommendations of inter-module connections were also given for the application of MSBs.

• 현장농수산연구지
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• 제15권1호
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• pp.25-43
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• 2013

Tasmania with its clean air, isolated from mainland Australia, has been producing high-quality agricultural products and has been continually developing organic farming since 1946 when the Living Soil Association of Tasmania(LSAT) was established. The organic farming movement in Tasmania has been actively advocated through three steps: the philosophical embryonic period, the movement diffusion period and the industrialised development period. The campaigns for informing about the connection between healthy soil and life unfolded during the embryonic period. This was followed by the birth of publicity of organic farming and the certification system through the dissemination of organic farming techniques and various events related to agriculture in the diffusion period when the Organic Gardening and Farming Society(OGFS) was established in 1972. In the industrialised development period, The Organic Coalition of Tasmania (OCT) which is representative of Tasmania was organised in 2000 and has been leading the organic farming industry. The organic farming movement in Tasmania not only limits the use of artificial agricultural chemical but pursues the quality of food, environment, the health of life including all animals and plants, the issue of development in rural society, social justice, and equity in understanding. It is far more holistic in its philosophy. The output of organic food accounts for 1 % of the total amount of agricultural production and 150 certified organic farms have managed with 5,000ha of land in 2010. The supply channels for organic foods vary from farmer's market, specialty stores, supermarket chains, local store to the cooperative community. Also the consumers' behaviour for organic foods has been establishing as an alternative life style. The education of the value and role of organic farming on the environment should be enlarged for the consumption of the organic food. In addition, organising for small farmers who act individually and the link with differentiated local food have still remained issues.

• 철학연구
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• 제131권
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• pp.131-163
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• 2014

'우리는 누구이며, 어디서 왔는가?' 우리 스스로에게 질문하고 우리 자신을 이해하는 것, 이것이야말로 인류 역사상 가장 위대한 혁명일 것이다. 하지만 우리는 아직 우리의 정체성을 묻는 이 물음에 명확한 답을 얻지 못하고 있다. 물론 '사회적 동물' 혹은 '이성적 동물' 같은 전형적인 정의들이 있지만 이들 역시 매우 허약한 규정들이다. 우리가 왜 사회적 동물이 되고 이성적 동물이 되었는지에 대한 해명조차 담고 있지 않기 때문이다. 이 글의 목적은 이 물음의 해답을 찾아가는 단서를 발견하여 우리의 정체성을 좀 더 명확히 하는데 있다. 실마리는 진화론적으로 우리와 가장 가까운 혈족으로 불리는 침팬지에게서 출발한다. 우리와 침팬지는 무엇이 다른가? 침팬지에게도 '자아'가 있을까? 이런 물음들을 통해 우리가 찾아낸 답은 이렇다. 즉 인간이 침팬지와 다른 존재가 된 것은 뇌의 발달과 함께 정밀하게 움직이는 운동 시스템을 갖게 되었고, 나아가 이러한 운동 시스템이 내면화되어 마음을 갖게 되었기 때문이다. 그리고 마음의 생각하는 능력도 바로 이러한 내면화 메커니즘이 진화 발전한 것이다.