• The Journal of Asian Finance, Economics and Business
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• 제7권10호
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• pp.275-281
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• 2020

This study aims to explore a new approach of relationship assessment by partially employing attitudinal commitment to measure the influence on perception of cooperation within the Vietnamese rice supply chains, which begins from commercial enterprises up to the retailers in the Vietnamese market. The quantitative research is first built around the measurement instruments for the constructs of relationship quality (RQ) and its dimensions; next, a questionnaire is designed; finally, we deal with sample issues and analyze the data to answer the research questions. The truncated sampling technique and Likert-scale survey is a suitable method for analyzing Vietnamese rice retailers and data collection. The preliminary test was conducted using SPSS Statistics; the main test was, then, carried out to evaluate the proposed model and test the hypotheses. Appropriately, the results point to a significant influence of attitudinal factors on trust and satisfaction. In addition, with the involvement of perceived trust and satisfaction, that combination showed the mediating effect between the attitudinal factors and the relationship quality. The ad-hoc analysis indicated the significant role of the two mediators. To be more specific, the high degree of trust and satisfaction has a positive impact on the formation of the relationship between participants in the sector.

• ETRI Journal
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• 제42권2호
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• pp.163-174
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• 2020

Numerous wearable technology companies have recently developed several headmounted display (HMD) products for virtual reality (VR) services. 5G wireless networks aim at providing high-quality 3D multimedia services such as VR, augmented reality, and mixed reality. In this study, we examine the application of millimeter-wave (mmWave) technology to realize low-latency wireless communication between an HMD and its content server. However, the propagation characteristics of mmWave present several challenges such as the deafness, blockage, and beam alignment problems, and interference among content servers. In this study, we focus on an environment that provides VR services in the mmWave band and introduce existing techniques for addressing such challenges. In addition, we employ a commercialized IEEE 802.11ad VR dongle to measure the actual data rate of an mmWave VR application and identify the degree to which the performance deteriorates when the above problems occur. Finally, we verify the feasibility of the proposed solutions through a simulation of several VR scenarios in the mmWave band.

• 지역사회간호학회지
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• 제12권1호
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• pp.214-225
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• 2001

The purpose of this study is to compare the characteristics of the demented elderly and normal elderly over 65 staying at home in Seoul. Here, the demented elderly are defined as the aged who score under 20 on the MMSE-K testing. The subjects were 15.104 elders in home. The method is a cross-sectional study home visiting survey with questionnaires. Data analyses were conducted by using frequency, percentage, t-test and ANOVA procedures. Results are as follows: First, general characteristics such as sex, age, marriage, education, physical health, and family characteristics such as economic level and single living showed a significant variance between demented elderly and normal elderly. Second, the demented elderly showed a significantly high point of AD and IADL. Third, in contrast with normal agents, the dementia showed a high need for assistance from the care giver but followed the same pattern. In conclusion, the above findings suggested that a social support system should be developed for the demented elderly and care givers in the home.

• Geomechanics and Engineering
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• 제25권1호
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• pp.17-30
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• 2021

This paper develops a convenient approach for deterministic and probabilistic evaluations of tunnel face stability using support vector machine classifiers. The proposed method is comprised of two major steps, i.e., construction of the training dataset and determination of instance-based classifiers. In step one, the orthogonal design is utilized to produce representative samples after the ranges and levels of the factors that influence tunnel face stability are specified. The training dataset is then labeled by two-dimensional strength reduction analyses embedded within OptumG2. For any unknown instance, the second step applies the training dataset for classification, which is achieved by an ad hoc Python program. The classification of unknown samples starts with selection of instance-based training samples using the k-nearest neighbors algorithm, followed by the construction of an instance-based SVM-KNN classifier. It eventually provides labels of the unknown instances, avoiding calculate its corresponding performance function. Probabilistic evaluations are performed by Monte Carlo simulation based on the SVM-KNN classifier. The ratio of the number of unstable samples to the total number of simulated samples is computed and is taken as the failure probability, which is validated and compared with the response surface method.

• 국제초고층학회논문집
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• 제7권4호
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• pp.265-285
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• 2018

This paper presents a state-of-the-art review on the design, research and education aspects of fire safety engineering (FSE) with a particular concern on high-rise buildings. FSE finds its root after Great Fire of Rome in 64 AD, followed by Great London Fire in 1666. The development of modern FSE is continuously driven by industry revolution, insurance community and government regulations. Now FSE has become a unique engineering discipline and is moving towards performance-based design since 1990s. The performance-based fire safety design (PBFSD) involves identification of fire safety goals, design objectives, establishment of performance criteria, and selection of proper solutions for fire safety. The determination of fire scenarios and design fires have now become major contents for PBFSD. To experience a rapid and positive evolution in design and research consistent with other engineering disciplines, it is important for fire safety engineering as a profession to set up a special educational system to deliver the next-generation fire safety engineers. High-rise buildings have their unique fire safety issues such as rapid fire and smoke spread, extended evacuation time, longer fire duration, mixed occupancies, etc., bringing more difficulties in ensuring life safety and protection of property and environment. A list of recommendations is proposed to improve the fire safety of high-rise buildings. In addition, some source information for specific knowledge and information on FSE is provided in Appendix.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2013년도 추계학술발표대회
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• pp.214-217
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• 2013

Advancements in automobile industries and the communication technologies caused VANET (Vehicular Ad Hoc NETwork) to evolve to VANET-based clouds before its deployment. It is more likely that VANET clouds will replace the traditional VANET in the deployment phase. It is to be noted that an abrupt deployment is out of question because it would require mass of resources and money to do so; instead incremental deployment is more ideal. In this paper, we aim at the incremental deployment phase of VANET clouds and focus on the well-established public transport networks. Data aggregation is one of the essential aspects in traditional VANET and has been researched for quite long time. However the previously proposed schemes are still controversial. Keeping in mind the time and space prediction of public buses, we leverage these buses as potential aggregators and MG (Mobile Gateways) in VANET clouds. Buses gather cooperative whereabouts information from neighbors, aggregate that information, disseminate it to the neighbor MGs and also send it to the cloud for storage and for services exchange. In our proposed scheme, we believe that the dissemination will be effective and cover most of the urban area since at any instant of time; buses cover most part of the urban areas. Besides, the effective transmission range is higher due to tall buses.

• 정보보호학회논문지
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• 제19권5호
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• pp.93-103
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• 2009

차량 애드혹 네트워크(VANET, Vehicular Ad hoc NETwork)에서 차량 간 교환되는 메시지가 위 변조되면 심각한 결과를 초래할 수 있어 중요 메시지의 인증은 반드시 필요하지만 이를 위해 일반 전자서명 기법을 사용하면 프라이버시가 침해될 수 있다. 따라서 VANET에서는 프라이버시를 보장하지만 문제를 발생시킨 차량을 식별할 수 있는 조건부 익명성이 제공되어야 한다. 이 논문에서는 각 차량에서 자체적으로 조건부 익명성이 보장되는 익명ID를 재암호화 기법을 이용하져 갱신할 수 있으며, 익명ID에 대한 표현문제를 이용하여 메시지를 서명한 다음 다른 차량에게 전달할 수 있는 VANET를 위한 새로운 인증시스템을 제안한다. 이 시스템은 ID의 사용기간을 제한하여 개별ID의 철회가 불필요하며, 필요할 경우에는 특정 차량의 서비스 참여를 제한시킬 수 있다. 제안된 시스템의 안전성은 일부 조작불가능한 하드웨어를 통해 제공하고 있다.

• 정보보호학회논문지
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• 제20권4호
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• pp.53-62
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• 2010

차량 애드혹 네트워크에서는 차량의 프라이버시를 보장하지만 문제를 일으킨 차량을 식별할 수 있는 조건부 익명성이 제공되어야 한다. 이를 위해 제안된 기존 기법들은 개별 메시지의 익명성을 철회할 수 있는 기능을 제공하고 있다. 만약 차량의 운행 경로를 파악할 수 있다면 사고에서 책임소재 규명과 범죄 수사에 유용하게 사용될 수 있다. 기존 메시지 철회 기능을 이용하여 차량의 운행 경로를 파악할 수 있지만 대상 차량뿐만 아니라 다른 차량의 익명성도 철회가 되는 문제점이 있다. 본 논문은 대상 차량을 제외한 다른 차량의 프라이버시를 침해하지 않으면서 차량의 운행 경로를 파악할 수 있는 효율적인 기법을 제안한다. 제안한 방법은 기존에 사용되는 메시지 인증 기법과 독립적으로 추가하여 사용할 수 있으며, 신뢰기관의 권한 상용을 방지하기 위한 메커니즘을 포함하고 있다.

• Journal of Hospice and Palliative Care
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• 제26권2호
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• pp.80-94
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• 2023

Purpose: This study aimed to identify attitudes toward advance directives (ADs) among female cancer patients and factors related to ADs. Methods: The study was conducted at a university hospital in Seoul from September 19, 2020, to January 20, 2021. The participants were 153 patients diagnosed with gynecological cancer or breast cancer. Data were collected using questionnaires and included general characteristics, disease- and AD-related characteristics, knowledge and attitudes about ADs, and attitudes about dignified death. Data were analyzed using the t-test, analysis of variance, and multiple regression analysis. Results: Only 2% of the participants completed ADs. The mean score for attitudes toward ADs was 3.30, indicating a positive knowledge and attitude toward dignified death. The factors related to attitudes toward ADs were attitudes toward dignified death (𝛽=0.25, P=0.001), experience discussing life-sustaining treatment (𝛽=0.17, P=0.037), preferred time to have a consultation about ADs (𝛽=0.19, P=0.046), intention to write ADs (𝛽=0.15, P=0.038), and Eastern Cooperative Oncology Group Performance Status (𝛽=-0.37, P<0.001). The explanatory power of these variables for attitudes toward ADs was 38.5%. Conclusion: Overall, patients preferred to have a consultation about ADs when they were still active, mentally healthy, and able to make decisions. Education about ADs should be provided to patients on the first day of hospitalization for chemotherapy or while awaiting treatment in an outpatient setting so patients can write ADs and discuss them with family and friends.

• 예술인문사회 융합 멀티미디어 논문지
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• 제7권9호
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• pp.1-12
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• 2017

This study is the academic work to explore the potential meanings of print advertisements. Linguistic features such as repetition, variation, contrast and phonological structure in the verbal texts of ads can give rise to shades-of-meaning or slight variations in advertising. The language of advertising is not only language in words. It is also a language in images, colors, and pictures. Pictures and words combine to form the advertisement's visual text.. While the words are very important in delivering the sales message, the visual text cannot be ignored in advertisements. Forming part of the visual text is the paralanguage of the ad. Paralanguage is the meaningful behaviour accompanying language, such as voice quality, gestures, facial expressions and touch in speech, and choice of typeface and letter sizes in writing. Foregrounding is the throwing into relief of the linguistic sign against the background of the norms of ordinary language. This paper focuses its discussion on the advertisements within the framework of the paradigmatic and the syntagmatic relationship. The sources of ads have been confined to Malboro. The ads were reselected based on purposive sampling methods.