• Korea Trade Review
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• v.48 no.1
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• pp.243-261
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• 2023

This study was conducted with the goal of analyzing the needs of Truckers, who are the main users of the cargo transportation platform, to find a development direction for the improvement and activation of the cargo transportation platform service. For this purpose, this study conducted an empirical analysis through IPA analysis targeting Truckers using domestic cargo transportation platforms. As a result of the IPA analysis, in the case of importance, fair fare presentation, unfair trade prevention measures, transportation payment deadline accuracy, transportation section information provision accuracy, quick interaction, application system quality, ease of use, user-customized service, settlement service support function, Variety of transportation sections, brand image, and additional services were shown in order. In the case of satisfaction, ease of use, settlement service support function, transport section information provision accuracy, application system quality, brand image, additional services, user-customized service, transport section diversity, quick interaction, transport payment deadline accuracy, unfair transaction prevention Measures and fair fares were presented in that order. The analysis results show high satisfaction with the ease of use related to the platform quality and the function to support the settlement work. These results can be seen as the result of a significant investment in system quality improvement for the convenience of users by suppliers in the domestic cargo transportation platform industry, where competition has become fierce. As the factors most urgently needed for improvement, 'observance of payment deadlines', 'prevention of unfair trade', and 'provision of fair fares' were selected, and these are related to chronic problems in the domestic freight transportation industry.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.6D
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• pp.571-577
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• 2012

Recently, improving public transport service at disabled people has emerged as a social issue in rural areas. By improving expensive and inefficient existing operating system, the rural bus have to change a personalized service. Under these circumstances, government and local governments are promoting the introduction of DRT(Demand response transport). DRT system is intended to promote the user's convenience. But, until now, in-depth research on the operating costs for the introduction of DRT is not well known. This study aims to look at changes in number of vehicle and operating costs before and after introduction of DRT. The results are as follows. Even though introducing DRT, total number of vehicles increases because it does not reduce the existing number of vehicles. And this study estimated to about 5 to 12 percent of the increase in the operating cost comparing before introduction of DRT. Therefore, The introduction of DRT in rural areas is a need to set the exact purpose as promote transportation convenience or cost efficiency.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.992-995
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• 2010

본 연구는 기존의 필름 운영체계에서 PACS 운영체계로 전환 시 업무 변화에 따른 보건소 구성원 간의 인식을 조사하고 이들이 가지고 있는 새로운 업무에 대한 저항감을 줄여 새로운 시스템 도입에 적극적으로 적응할 수 있도록 하여 업무의 효율성을 높일 수 있는 기초 자료를 제공하고자 시행하였다. 연구기간은 2009년 6월1일부터 2009년 12월 16일까지이며 연구방법은 대전, 충남북에 소재하고 있는 필름운영체계에서 PACS 체계로 바뀐 보건소의 의사, 방사선사, 간호사, 기타 직종을 대상으로 하였으며 70부의 설문이 분석에 사용되었다. 임상적 유용성 인식은 방사선사(2.8) > 의사(2.7) > 간호사(2.4) > 기타(2.0)로 모든 직종이 향상된 것으로 인식하고 있었으며 PACS 가 필름시스템 보다 임상적으로 사용자 편리서, 접근 용이성 등이 모두 우수하며 임상적으로 유용하다고 답했다. 업무변화 및 효율성 인식은 방사선사(3.2) > 간호사(2.0) > 의사(1.988) > 기타(1.983) 순으로 직종별 차이를 보여 PACS 운영이후 업무가 효율적으로 변화되었다고 인식하고 있었다. 진료 및 근무환경 인식은 방사선사(3.6) > 의사(3.2) > 간호사(3.1) > 기타(3.0) 순으로 진료 및 근무환경이 향상되었다고 답했다. 교육적절성에 관한 인식은 기타(3.5) >간호사(3.0) > 의사(2.8) > 방사선사(2.5) 순으로 직종별 차이를 보였다. 적응 및 만족도 인식에서는 방사선사(2.9) > 기타(1.7) > 간호사(1.6) > 의사(1.5) 순으로 직종별 차이를 보였으며 PACS 운영이후 사용자의 적응도와 만족도가 높다는 것을 알 수가 있었다. 병원정보시스템의 핵심인 PACS 도입과 같은 보건소정보화 과정에서의 보건소 구성원의 인식을 알아본 결과, 임상적 유용성 인식, 교육 적절성에 관한 인식에서는 근무 년 수가 적을수록, 유용성이 높다고 했으며, 업무 변화 및 효율성 인식, 진료 및 근무환경 인식, 적응 및 만족도 의식에서는 근무 연수가 길수록 유용성이 높다고 인식하고 있었다. 성별에 따른 임상적 유용성 인식과 업무 변화 및 효율성 인식에서는 남자가 여자보다 유용하다고 인식하고 있었다. 연령별 차이에 따른 임상적 유용성 인식, 업무 변화 및 효율성 인식, 진료 및 근무 환경 인식은 40대 이상에서 높다고 인식하였다. PACS 도입으로 인해 보건소 구성원의 거부반응과 같은 저항감이나 부담감, 소극적 참여의지 등의 태도나 인식이 예상되었으나 연구 결과 대체적으로 모두 긍정적으로 인식하였으며 PACS가 보건소 구성원들에게 기존 필름체계를 대체할 수 있는 수단으로 유용하게 인식하고 있었다. 다만 본 연구결과는 향후 새로운 PACS 도입 시 성공적인 운영을 위해 직종에 따른 정보 제공 및 맞춤형 훈련 교육이 필요함을 시사하고 있다.

• Journal of Digital Convergence
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• v.12 no.6
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• pp.277-287
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• 2014

In LBSNS(Location-based Social Network Service), users can share locations and communicate with others by using check-in data. The check-in data consists of POI name, category, coordinate and address of locations, nickname of users, evaluating grade of locations, related article/photo/video, and etc. If you analyze the check-in data from the location-based social network service in accordance with your situation, you can provide various customized services. Therefore, In this paper, we develop a location recommendation system based on LBSNS that can utilize the check-in data efficiently. This system analyzes the location category of the check-in data, determines the weighted value of it, and finds out the similarity between users by using the Pearson correlation coefficient. Also, it obtains the preference score of recommended locations by using the collaborated filtering algorithm and then, finds out the distance score by applying the Euclidean's algorithm to the recommended locations and the current users' locations. Finally, it recommends appropriate locations by applying the weighted value to the preference score and the distance score. In addition, this paper approved excellence of the proposed system throughout the experiment using real data.

• Journal of the Korean Institute of Intelligent Systems
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• v.22 no.4
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• pp.429-434
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• 2012

This paper presents a technology for manipulating external devices by Brain Computer Interface (BCI) system. Recently, BCI based rehabilitation and assistance system for disabled people, such as patient of Spinal Cord Injury (SCI), general paralysis, and so on, is attracting tremendous interest. Especially, electroencephalogram (EEG) signal is used to organize the BCI system by analyzing the signals, such as evoked potential. The general findings of neurophysiology support an availability of the EEG-based BCI system. We concentrate on the event-related synchronization of motor imagery EEG signal, which have an affinity with an intention for moving control of external device. To analyze the brain activity, short-time Fourier transform and particle swarm optimization are used to optimal feature selection from the preprocessed EEG signals. In our experiment, we can verify that the power spectral density correspond to range mu-rhythm(${\mu}8$~12Hz) have maximum amplitude among the raw signals and most of particles are concentrated in the corresponding region. Result shows accuracy of subject left hand 40% and right hand 38%.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.7
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• pp.825-830
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• 2015

The Electronic Medical Record(: EMR) is to store medical data not in the form of document, but in the data storage. Such EMR can not only solve various problems of document use such as storage/arrangement of and securing space for document, but also make it possible to provide customized-treatment based on large quantity of customer data, so that hospitals can reduce the management cost and also improve the work efficiency. Customers also can receive the great quality of medical service. Owing to such strengths, the EMR has been rapidly introduced and applied to many hospitals and clinics since 1990s. In case of the current health screening system, however, paper forms used for health screening is also stored, on top of EMR. There would be various reasons why it is stored in the form of document. While the EMR used in hospitals is comprised of a unit program performing medical record, the health screening system is comprised of a unit program performing logics related to health screening. For this reason, it might be unavoidable for the health screening system to store document forms. If the EMR function is applied to the health screening system, it is expected to be able to operate more efficient health screening solution.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.10
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• pp.6888-6894
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• 2015

Bluetooth 4.0 is the most appropriate technology for Internet of Things, which can be used to enhance and expand the existing areas and areas with a variety of applications. In this paper, an example of the services of the Internet of Things, we developed a tour guide system using the Bluetooth 4.0 and WiFi sensor technology. iBeacon-based push service have been limited to iOS smart phone series, non-iOS family and lower version of iOS 6 smart phones can not receive push-based services. This paper proposed in iBeacon and WiFi sensor is more than tourists, while maintaining the existing system (non-iOS smartphone users) can provide the service to you. Service tourist information as well as that can provide the advertising associated with the service. With 10 kinds of smart phones used in Korea was the experiment on the MAC information collected. This experiment is to track the behaviour of tourists in history can provide customized services can be based. Tourist destinations as well as amusement parks, resorts, etc. If you want to apply this system in a crowded place for user behavior information-gathering feature views over the a prevention of a missing child features such as notifications, risk, prevention is possible for a variety of applications.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.561-564
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• 2016

If using crime map which represents criminal section that violent crimes targeting women frequently happened, the police could prevent additional crimes by positioning themselves intensively in expected crime zones and each individual could avoid being damaged by referring information of criminal zones. In this paper, by analyzing crimes targeting women and offender information which is provided in public-opened datum portal, we suppose a system which prevents crimes that calculates locational danger and, by considering location and age group of users, provides user-customized information of danger. By crawling the criminals datum which is provided in public-opened datum portal, It collects them. About the areas which happened sexual crimes, calculating danger of crime based on statistical crime information including criminal information, residence of offenders, areas which happened sexual crimes, sentences and the number of crime, this system is able to visualize the areas which sexual crimes happened based on information of danger grade representing on user's location. The score of danger calculated in location unit can provide criminal information according to location and ages of users by interacting GIS.

• Journal of the Korea Convergence Society
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• v.12 no.4
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• pp.207-216
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• 2021

Recently, there is increasing interest in attracting local tourist in the city to revitalize the local economy. For this purpose, customized tourism strategies based on the analysis of travel routes and consumption patterns are becoming important. However, existing studies either focused on limited mainstream tourist analysis or lacked analysis of tourists' behavior-based data perspectives. Therefore, this study aims to present a big data-based tourism strategy that provides customized information by analyzing the demand of individual travelers in details based on mobile service data and card expenditure data generated by the travelers in Yongin city. By tracing those data, this study visualized the tourists' itinerary and their expenditure patterns. The analysis of data from July 2017 to June 2018 shows that men tend to consume in various areas compared to women. It also shows consumption areas for people in their 30s and 40s are similar, whereas those in their 20s do not vary. Using the big data based on Geographic Information system, this study provides strategic insights to administrative personnel who are in charge of tour policy.

• Journal of Life Science
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• v.33 no.7
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• pp.538-548
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• 2023

The research has been conducted on the isolation of antimicrobial compounds from plant natural extracts and their potential application in oral health care products. This study aimed to investigate the antimicrobial mechanism by analyzing the changes in gene expression of Streptococcus mutans, a major oral pathogen, in response to complex compounds extracted from Aralia continentalis and Arctii Semen using organic solvents. Transcriptome analysis (RNA-seq) revealed that both natural extracts commonly upregulated or downregulated the expression of various genes associated with different metabolic and physiological activities. Three genes (SMU_1584c, SMU_2133c, SMU_921), particularly SMU_921 (rcrR), known as a transcription activator of two sugar phosphotransferase systems (PTS) involved in sugar transport and biofilm formation, exhibited consistent high expression levels. Additionally, component analysis of the A. continentalis extract was performed to compare its effects on gene expression changes with the A. Semen extract, and two active compounds were identified through gas chromatography-mass spectrometry (GC-MS) analysis of the active fraction. The n-hexane fraction (ACEH) from the A. continentalis extract exhibited antibacterial specificity against S. mutans, leading to a significant reduction in the viable cell counts of Streptococcus sanguinis and Streptococcus gordonii among the tested multi-species bacterial communities. These findings suggest the broad-spectrum antibacterial activity of the A. continentalis extract and provide essential foundational data for the development of customized antimicrobial materials by elucidating the antibacterial mechanism of the identified active compounds.