• 한국통신학회논문지
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• 제33권8B호
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• pp.636-645
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• 2008

센서 네트워크에 있어서 정보 전송 노드인 근원지의 위치를 악의적 추적자로부터 보호하기 위해 길이가 긴 경로를 통해 단일 메시지를 전송하는 라우팅에서는 전달 지연이 길어지는 단점이 있다. 본 논문에서는 전송 메시지가 사전에 주어진 경우, 근원지 위치를 보호하면서 최소 비용의 단일 경로를 이용하여 이들을 목적지로 전달하는 문제는 NP-complete 임을 보인다. 이러한 양 극단의 절충 방안이라 할 수 있는 경로 당 $\omega$개의 메시지들을 전송하도록 하여 근원지의 위치 보호 능력을 높이면서도 전달 지연을 저감시키는 라우팅 프로토콜 GSLP-$\omega$ (GPSR-based Source Location Privacy with crew size $\omega$)를 제안한다. 평가 기준으로는 목적지와의 최단 경로의 홉 수를 기준으로 정규 안전 기간(NSP: Normalized Safety Period)과 정규 전달 지연(NDL; Normalized Delivery Latency)을 고려한다. 평균 차수(degree)가 8인 노드 50,000개로 구성되는 네트워크 토폴로지 100개를 생성하여 측정한 결과 제안된 GSLP-$\omega$는 GSLP-$\omega$의 초기 버전인 GSLP와 기존의 대표적인 근원지 위치 보호 라우팅 프로토콜인 PR-SP(Phantom Routing - Single Path)보다 더 높은 안전 기간을 보였다. 전달 지연에서는 GSLP-$\omega$가 PR-SP보다 높으나 GSLP 보다는 낮은 것으로 나타났다.

• 동아시아경상학회지
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• 제11권2호
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• pp.59-70
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• 2023

Purpose - The hospitality industry has experienced significant transformations in recent years, primarily driven by advancements in technology and changes in consumer behavior. The worldwide COVID-19 epidemic has intensified a trend of hotel guests increasingly relying on meal delivery applications. Considering the recent COVID-19 pandemic, this study sets out to investigate how hotel guests have been using food delivery apps before and during the outbreak. Research design, data, and methodology - This study utilizes a systematic literature review as its research design. A systematic literature review is a methodical, well-structured procedure for locating, analyzing, and synthesizing pertinent research articles. Result - The findings shed light on four main aspects: convenience and accessibility, safety and hygiene assurance, personalization and customization, and local exploration and cultural immersion. These findings provide valuable insights into the evolving preferences and behaviors of hotel guests in utilizing food delivery apps, particularly in the context of the COVID-19 pandemic. Conclusion - This study has contributed to the understanding of the changing role of food delivery apps among hotel guests. By recognizing the evolving dynamics and leveraging the opportunities presented by food delivery apps, hotels can adapt to meet guest expectations, enhance customer satisfaction, and thrive in the ever-changing landscape of the hospitality industry.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.489-492
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• 2016

Transportation in the logistics, many business organizations are engaged in monitoring and tracking the vehicles in order to improve logistics services, reduce expenses and secure security in cargo transportation. It is saving time and money by tracking and monitoring vehicles which transport cargo in supply chain of logistics. Therefore the main issue of delivery flow is to improve services, and ensure the safety in transportation system. This article suggests the tracking and monitoring model to keep safety transports on ICT network. It focuses on precise delivery control by monitoring and tracking vehicles to save time and costs. The status of product movement is analyzed for proper decision making. The vehicle embedded with RFID is automatically tracked in the movement process by tracking and monitoring model. The main role keeps safety tracking to reduce costs and to deliver products at proper time and location.

• 대한설비관리학회지
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• 제23권4호
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• pp.29-38
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• 2018

Through process quality information, the time required for process quality analysis has been drastically shortened, the process defect rate has been reduced, and the manufacturing lead time has been shortened and the on-time delivery rate has been improved. Therefore, The purpose of this study is to develop a quality information analysis system model that effectively shortens the time required for process quality analysis in automobile safety belt parts manufacturing process. As a result of experiments on communication operation between manufacturing execution system (MES) quality server, injection machine control computer, injection machine programmable logic controller (PLC) and terminal, in analyzing quality information, the conventional handwriting input method took an average of 20 minutes, but the new multi-network method took about 2 minutes on average. In addition, the process defect rate was reduced by 13% and the manufacturing lead time was shortened from 28 hours to 20 hours. The delivery compliance rate improved from 96 to 99%.

• Safety and Health at Work
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• 제12권2호
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• pp.147-153
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• 2021

Background: In this study, the association of work and demographic characteristics with different traffic offenses committed by food delivery riders in Greece was examined. Previous research has identified various factors related to risky driving however, there is a need for exploring the complex interrelationship of work-related factors underlying risky driving behavior. Materials and Methods: A 2-items uestionnaire was used exploring delivery riders demographic characteristics, terms of employment, issues of concern during work and type of traffic offenses committed. In total, uestionnaires were analyzed using logistic regression in order to identify characteristics independently associated with serious traffic offenses, namely, red-light running and helmet non-use. Results: The analysis showed that: (i) typical health and safety measures had no effect on serious traffic offenses, (ii) young age was related to both offenses however (iii) different sets of work conditions were associated with reports of red-light running (i.e. low work experience, use of personal vehicle for work, and payment by hour) and helmet non-use respectively (i.e. intense work pace, high tip income per day and low concern about vehicle condition). Conclusion: The above findings provide evidence that serious traffic offenses are manifestations of underlying conflict experienced by the riders between safety and various performance criteria. Each one of the two offenses is related to different rider profiles aiming to satisfy different goals, namely, those mainly trying to maximize profit non-helmet users and those, mostly inexperienced ones, trying to cope with work pressure red light runners. Potential regulatory measures to alleviate risky practices are discussed.

• 경영과정보연구
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• 제29권3호
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• pp.1-21
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• 2010

본 연구의 목적은 (1) e-Business의 안전성에 영향을 미치는 요인을 도출하고, (2) 도출한 요인의 타당성을 검증하기 위하여 기업의 성과와의 연관성을 검토하는데 있다. 기업의 성과는 전통적으로 학계에서 사용되어 왔던 회계적인 측정치인 자산수익률 (ROA: Return on Assets)과 최근 대안으로 부각되고 있는 마케팅적인 측정치인 Tobin's q를 모두 사용하여, 기업의 성과를 보다 정확하게 측정하고자 한다. 문헌연구를 통하여 도출된 9개 성공요인과 요인의 구성항목을 1단계 패널평가를 통하여 그 타당성과 정확성을 검토하여 설문지를 개발한 후, 수도권 e-Business 업체 담당중역이나 관리자에게 설문을 배포하였는데, 최종응답율은 72.6% (n = 212)였다. 설문분석 결과, 응답자들은 정보관리(INFO MGT)를 e-Business의 안전성에 가장 큰 영향을 미치는 요인으로 평가하였다. 이어서 대금 결제(PAYMENT), 보안프로그램 (PROGRAMS), 침범 (INTRUSION) 순으로 영향력을 평가하였다. 정부정책 (GOVT POLICY)은 9가지 요인 중 가장 낮게 평가되었다. 각 요인이 기업의 성과에 미치는 영향을 파악하기 위하여 회귀분석을 실시하였는데, e-Business의 안전성에 영향을 미치는 요인들이 기업의 성과에 대하여 설명력이 높은 것으로 나타나, 본 연구에서 도출한 e-Business의 안전성에 영향을 미치는 요인들이 상당한 설득력을 가지고 있는 것으로 검증되었다. 응답자들은 Tobin's q의 경우 정보관리(INFO MGT), 배송(DELIVERY), 침범(INTRUSION) 이 그리고 ROA의 경우 정부 정책(GOVT POLICY), 인식(AWARENESS), 배송(DELIVERY), 그리고 침범(INTRUSION) 이 통계적으로 유의하게 설명력을 갖는 요인들로 파악되었다.

• 한국식품저장유통학회지
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• 제17권6호
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• pp.889-896
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• 2010

본 연구는 학교급식 식재료의 위생관리 실태를 파악하기 위하여 식재료 유통업체 38곳을 대상으로 위생관리 수행수준과 위생관리 현황을 조사하였다. 학교급식 식재료 공급과 관련된 업체 위생관리 수행수준은 5점 척도의 자가평가로 실시되었으며, 식재료관리와 배송직원 관리영역은 4.47/5(89.4/100)점, 배송차량 관리영역은 4.38/5(87.6/100)점이었고, 총 수행점수는 4.45/5(89/100)점이었다. 대리점형태의 유통업체의 위생관리 점수가 가장 높았고, 개인위생 영역의 점수가 유의하게 높았다. 또한 83%의 유통업체가 납품의 투명성을 확보하기 위해 식재료 품질 규격서가 필요하며, 유통단계에서의 위생인증제도가 필요하다고 하였다.

• 한국식품영양학회지
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• 제34권4호
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• pp.365-371
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• 2021

This study was conducted to understand the type of use and satisfaction of delivery food by Chinese and Korean students. In December 2019, Korean and Chinese students living in Gyeonggi Province were analyzed using SPSS. The average number of food deliveries was 1~2 times a month and used 30.7% of the Korean students and 21.8% of the Chinese students. As for how to order food for delivery, 62.2% of Korean college students took up mobile apps, and 49.0% of Chinese students took up mobile phones. In terms of satisfaction after using delivery food, Korean students scored 3.89 points for taste and 3.74 points for using a neat and convenient packaging container, while Chinese students showed the highest score of 3.69 points for past eating experiences and 3.65 points for taste. As for the factors influencing the satisfaction after using the delivered food, the food quality satisfaction (β=0.518) for Korean students and favorable menu factor (β=0.533) for Chinese students were found. Therefore, it is judged that it is necessary to continuously improve the quality, service, convenience and diversity of delivered food, and health and safety factors in order to improve the delivery patterns and satisfaction of college students.

• 대한인간공학회지
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• 제35권5호
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• pp.465-472
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• 2016

Objective:This study is on the characteristics of motorcycle accidents occurring in the mail delivery process by skill level. Background: The tendency of delivery postmen's driving in a hurry may become the cause of accidents since there is a constraint that delivery should be completed within a limited time. Method: This study analyzed the traffic accident data of 259 delivery postmen, who had been approved as occupation-related industrial accident victims from 2009 to 2012, by their work experience in view of season, day of the week of an accident occurrence, accident occurrence time, accident cause, collision type, and driving situation. Results: Accident characteristics of delivery postmen show that the ratio of accidents occurring to those who had less than 10 years of work experience was high. There were many motorcycle collisions in winter and summer by season and an unexpected object, along with road condition, took up 70.7% of the accident sources. There were no differences in accident occurrence time, the day of the week, season, accident source, and collision type between the group of delivery postmen with less than 10 years of work experience and those with 10 years or more of work experience. However, there was a difference in distribution of driving condition. Conclusion and Applications: The results of this study can be used to present the policies or guidelines for the accident prevention of delivery postmen since the results show the characteristics of the injured and accident occurrence characteristics in relation with the delivery postmen's motorcycle collisions.

• 대한한방부인과학회지
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• 제27권3호
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• pp.94-103
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• 2014

Objectives: The aim of this study is to identify effects and safety of Korean traditional medicine, especially including Pinelliae Rhizoma, for hyperemesis gravidarum, and to suggest appropriate dosage and treatment duration of Pinelliae Rhizoma. Methods: The study was performed based on the medical records of 19 hyperemesis gravidarum patients treated with Korean traditional medicine including Pinelliae Rhizoma. Change of symptoms, continuance of pregnancy, malformation of infants, and delivery outcomes were analysed. Results: The symptoms of hyperemesis gravidarum were improved in 13 patients. With regards to pregnancy outcome, normal fullterm delivery was 16 case, preterm delivery was 1 case and abortion was 2 case, Infants malformation was not found in any case. The average daily dosage of Pinelliae Rhizoma was 6.53 g/day, and the average treatment duration of Pinelliae Rhizoma was 11.53 (day). Conclusions: In this study, using Korean traditional medicine including Pinelliae Rhizoma for hyperemesis gravidarum patients is considered safe if patients are treated with proper clinical dosage and duration of medication. More cases and studies in the future will be required for the appropriate use of Pinelliae Rhizoma for hyperemesis gravidarum patients.