• Proceedings of the Korea Information Processing Society Conference
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• 2003.05a
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• pp.165-168
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• 2003

본 논문에서는 무선 인터넷에 관한 관련 기술을 이용하여 분산 데이터 동기화 표준인 SyncML을 통해 무선 인터터넷 환경에서의 실제적으로 응용 가능한 영업 사원의 업무 자동화 (SPA : Sails Force Automation) 솔루션을 무선디바이스인 PHOPNE 과 PDA 에서 운영할 수 있는 최적 동기화 모듈의 설계와 구현에 목적이 있다. 본고에서는 무선 인터넷 기술, 동기화 기술, 영업사원의 업무 자동화 기술에 언급하고 세 가지 기술을 이용하여 실질적으로 물류, 유통 업무에 사용 할 수 있게 객체 지향 설계 방법과 소스를 분석하여 최적화된 시스템을 도출하고 그것을 통해 무선단에서 경량화된 동기화 최적의 시스템을 설계, 구현하였다. 무선단에서 여러 제약 사항 특히 데이터의 관리에 있어서의 문제점을 동기화 기술을 통해 많은 데이터를 효과적으로 관리함으로써 대용량의 데이터베이스와 디바이스에 상관없이 분산 데이터 일관성과 통합관리 기능을 유지하고 무선단에서 지연성(disconnection)에 대한 신뢰성을 유지 할 수 있는 시스템을 분석과 설계를 통해 객체지향적인 방법으로 고려해서 시스템을 구축하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.5
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• pp.1099-1103
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• 2016

The user's secret key can be retrieved by the leakage informations of power consumption occurred during the execution of scalar multiplication for elliptic curve cryptographic algorithm which can be embedded on a security device. Recently, a carry random recoding method is proposed to prevent simple power and differential power analysis attack by recoding the secret key. In this paper, we show that this recoding method is still vulnerable to the differential power analysis attack due to the limitation of the size of carry bits, which is a different from the original claim.

• The Korean Journal of Health Service Management
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• v.3 no.1
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• pp.78-90
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• 2009

The purpose of this study is to propose ways of promoting medical tourism in Busan. For the purpose, this researcher made a questionnaire survey of Japanese tourists who used in Busan International Ferry Terminal between January and April 30, 2008. Findings of the study can be summarized as follows. 86.3% of all respondents had never experienced any medical service in Korea. 57.3% said that the most important thing is the level of medical technology. Most of respondents preferred massage treatment using spa and sea water, followed by Oriental medical services. To make medical conditions(price competitiveness, high-level medical technology, high-quality medical facilities) of Busan properly informed to the outside, it is required to make the city itself more internationally recognized through public relations and strengthening individual medical services provided in the city. It is also required to build up a non-stop service system that helps foreign tourists not only easily use medical institutions, but also better cope with a variety of problems that they might face during stay in the city. To be more trustable to foreign patients, medical services of Busan should be certified by JCI. Furthermore, it is very much needed to develop products which connect medicine with tourism, for example, such programs that combine medical services, tourism, recreation and leisure.

• Journal of the Korean Society of Physical Medicine
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• v.14 no.1
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• pp.35-41
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• 2019

PURPOSE: This study examined the effects of a vestibular stimulation training program on the walking ability of chronic stroke patients over a six month period. METHODS: Forty stroke patients were enrolled in this study. The patients were divided randomly into a control group (n=20) and experimental group (n=20). A general exercise program was applied to Group I and vestibular stimulation training was applied to Group II(30 min, three times a week for six weeks). The changes in straight walking ability, curved walking ability, and functional walking ability were measured using a 10 m walking test figure-of-eight-walking test, and dynamic gait index, respectively. The measures before and after the program were compared using a paired t-test for a comparison of each group and an independent t-test for a comparison between groups. RESULTS: The changes in each group were examined according to the measurement period. The Experimental group showed significant functional improvement in all three tests after the vestibular stimulation training program, but the control group did not show significant improvement in any of the tests after the general exercise program. A comparison of the changes between groups revealed the experimental group to show significantly higher improvement than the control group in all tests. CONCLUSION: The vestibular stimulation training program helps improve the gait function of stroke patients. Based on the results of this study, it is expected that various vestibular stimulation training programs will be developed and applied in a range of places.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.34 no.8
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• pp.43-50
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• 2018

The purpose of this study is to analyze the effect of architectural attributes on operating revenue by concentrating on the facility side and to investigate how much individual architectural factors can affect operating revenue. The time range of this study is limited to 2015, and the spatial range is limited to a tourist hotel in Seoul that can be easily surveyed and verified. The analysis method is to confirm the significance and influence of each attribute through regression analysis. According to the results, The room part such as number of rooms or area showed a relatively low correlation with "revenue per available room (Rev.PAR)" than "average daily rate (ADR)", but showed a high correlation with non - architectural attributes such as auxiliary facilities and chain. This shows that factors that influence the operating profit of hotel are not the part of the room but the other factors such as the auxiliary facilities work more. In addition, the presence of spa and the number of auxiliary facilities in the hotel have a positive effect on the operating profit of the hotel due to the non - architectural attributes. This is expected to provide a new direction for future research in studying hotel facilities.

• Acta Via Serica
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• v.7 no.1
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• pp.131-148
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• 2022

While much has been written about Imperial Japan's encounter with geopolitics and developing ideas about Geography as a political and cultural discipline, little if anything has been written about relational and research Geographies between Japan and Silk Roads both ancient and modern. Memories of the ancient Silk Road were revivified in the late 19^th century in tandem with the Great Game of European nations, as Japan modernized and sought new places and influence globally following the Meiji restoration. Imperial Japan thus sought to conquer and co-opt spaces imagined to be part of or influenced by the ancient Silk Road and any modern manifestation of it. This paper explores a particular process in that co-option and appropriation, research collaboration between institutions of the Empire. In particular it considers the exploration of Mengjiang/Inner Mongolia after its conquest in 1939/1940, by a collaborative team of Korean and Japanese Geographers, led by Professor Tada Fumio. This paper considers the making knowable of spaces imagined to be on the ancient Silk Road in the Imperial period, and the projecting of the imperatives of the Empire back into Silk Road history, at the same time as such territory was being made anew. This paper also casts new light on the relational and collaborative processes of academic exchange, specifically in the field of Geography, between Korean and Japanese academics during the Korean colonial period.

• Journal of Auto-vehicle Safety Association
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• v.14 no.3
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• pp.48-59
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• 2022

A V2X system can be a candidate as a means to increase the stability of autonomous vehicles. In particular, in order to implement a Level 4 or higher autonomous driving system, the application of the V2X system is essential. Wireless communication technologies applicable to the V2X system include WAVE and C-V2X. Currently, the V2X service most used by autonomous driving systems is a service that provides signal phase and timing information and since real-time characteristic is a very important, verification of this service must be done. In this paper, we measured the time delay characteristics for providing signal phase and timing information using WAVE and LTE communication, and proposed a TOD-based signal phase and timing information generation method without using V2X communication system. To analyze the time delay characteristics, RTT (Round Trip Time) was measured as a result of the measurement. Average RTT using WAVE communication was 5.84ms and was 104.15ms with LTE communication. As a result of measuring the error between the signal phase and timing information generated based on TOD and the actual traffic light state, it was measured to be -0.284~3.784sec.

• Genomics & Informatics
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• v.19 no.3
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• pp.21.1-21.5
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• 2021

The use of social media data, like Twitter, for biomedical research has been gradually increasing over the years. With the coronavirus disease 2019 (COVID-19) pandemic, researchers have turned to more non-traditional sources of clinical data to characterize the disease in near-real time, study the societal implications of interventions, as well as the sequelae that recovered COVID-19 cases present. However, manually curated social media datasets are difficult to come by due to the expensive costs of manual annotation and the efforts needed to identify the correct texts. When datasets are available, they are usually very small and their annotations don't generalize well over time or to larger sets of documents. As part of the 2021 Biomedical Linked Annotation Hackathon, we release our dataset of over 120 million automatically annotated tweets for biomedical research purposes. Incorporating best-practices, we identify tweets with potentially high clinical relevance. We evaluated our work by comparing several SpaCy-based annotation frameworks against a manually annotated gold-standard dataset. Selecting the best method to use for automatic annotation, we then annotated 120 million tweets and released them publicly for future downstream usage within the biomedical domain.

• Advances in aircraft and spacecraft science
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• v.9 no.6
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• pp.537-551
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• 2022

The rapid decrease of fossil fuel resources and increase of environmental pollution caused by aviation industries have become a severe issue which leads to an increase in the greenhouse effect. The use of biofuel becomes an option to alleviate issues related to unrenewable resources. This study presents a computational simulation of the biofuel combustion characteristics of various alternative fuels in an annular combustion chamber designed for training aircraft. The biofuels used in this study are Sorghum Oil Methyl Ester (SOME), Spirulina Platensis Algae (SPA) and Camelina Hydrotreated Esters and Fatty Acids (CHEFA). Meanwhile, Jet-A is used as a baseline fuel. The fuel properties and combustion characteristics are being investigated and analysed. The results are presented in terms of temperature and pressure profiles in addition to the formation of NOx and soot generated from the combustion chamber. Results obtained show that CHEFA fuel is the most recommended biofuel among all four tested fuels as it is being found that it burns with 37.6% lower temperature, 15.2% lower pressure, 89.5% lower NOx emission and 8.1% lower soot emission compared with the baseline fuel in same combustion chamber geometry with same initial parameters.

• Journal of Fashion Business
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• v.26 no.1
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• pp.140-157
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• 2022

This study examined the types of retro marketing of fashion brands and explored the difference in retro characteristics and nostalgic emotions. Additionally, the effects of retro characteristics on nostalgic emotions and the influence of nostalgic emotions on brand attitude were examined. A total of 33 fashion brands, including eight designer brands, 10 sports and outdoor brands, 11 casual brands, and four SPA brands were investigated to categorize the retro marketing types. An online survey was also conducted of respondents in their 20s to 50s, and a total of 363 responses were analyzed using SPSS 26.0. The results were as follows. First, the retro marketing of fashion brands was categorized into four types including brand heritage marketing, retro design marketing, retro emotional experience-oriented marketing, and brand collaboration marketing. The four retro marketing types showed differences in retro characteristics and nostalgic emotions. Second, the retro characteristics consisted of four dimensions including familiarity, attractiveness, uniqueness, and historicity. Nostalgic emotions consisted of four dimensions including sadness, longingness, comfort, and pleasure. Third, the results showed that familiarity and attractiveness had significant effects on comfort and pleasure, while uniqueness and historicity had significant effects on longingness. Fourth, the results showed that longingness, comfort, and pleasure had positive effects on brand attitude, whereas sadness had a negative effect on brand attitude.