• 통상정보연구
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• 제15권2호
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• pp.71-82
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• 2013

자동차 공급망은 자동차기업들이 글로벌화되어 아웃소싱이 일반화되고 해외생산기지를 구축함에 따라 지속적으로 복잡하게 되었다. 자동차산업에서 순환물류용기 (RPC: Returnable Plastic Container) 의 사용은 물류효율과 비용절감 측면에서 매우 일반화되어 있으나 주로 내수용으로 활용하고 있으며 국제무역용으로는 절대적인 운송거리가 길고 운영관리가 복잡해져 크게 활용되지 않고 있다. 이 연구는 시뮬레이션을 통하여 1회용기와 반복사용이 가능한 순환물류용기를 pooling system으로 적용하는 경우 기업에 미치는 경제적 영향을 비교하였다. 결론적으로 미국과 같은 장거리 국제물류에서는 순환물류용기의 사용이 어려우나 중국과 일본과 같이 비교적 단거리 국제무역에서는 pooling 시스템의 도입으로 경제적으로 타당한 것으로 나타났다. 이 연구결과는 국제공급망 환경에 따라 경제적으로 최적의 포장방법과 형태의 변화가 필요함을 밝혔다. 다만, 국제무역상 발생하는 통관상의 복잡함, 관세, 국내와 해외 물류환경의 상이로 인한 효율성 저하 등의 문제는 하기 위해서는 보다 많은 연구가 필요하다.

• 한국전자파학회논문지
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• 제26권5호
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• pp.445-454
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• 2015

본 논문에서는 고이득 이중 반사경 안테나(DTA: Dual Reflector Antenna)의 성능 향상을 위한 최적설계 기법으로 유전 알고리즘(GA: Genetic Algorithm)을 적용하였다. 또한, 최적설계과정에서 반복해석에 요구되는 계산 시간을 줄이고자 ADE 안테나의 각 반사경의 표면전류분포 계산에 반복적 물리광학법(IPO: Iterative Physical Optics)을 이용하였다. 물리광학법 적용시 음영지역에 대한 고려 및 다중반사에 의한 영향을 MFIE(Magnetic Field Integral Equation) 기반의 반복적인 계산을 통해서 해의 정확도를 향상시켰다. 또한, 설계변수의 축소 및 제작 가능한 부드러운 곡면 형성을 위하여 베지어 곡선을 적용하였다. 이럴 경우, 베지어 곡선의 제어점이 설계변수로 설정이 된다. 최적설계를 위한 목적함수로 HPBW(Half Power Beam Width), FNBW(First Null Beam Width), SLL(Side Lobe Level) 등을 고려하였으며, 설계 및 해석의 결과를 기존의 상용 해석프로그램과 비교하였다.

• 한국통신학회논문지
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• 제29권12A호
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• pp.1380-1386
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• 2004

미래의 통신망은 유, 무선 가입자 망이 혼합된 형태로 존재하고, 통신망 내에는 다양한 형태의 트래픽이 존재할 것으로 생각된다. 이때 각 트래픽이 요구하는 QoS 요구조건은 서로 상이하기 때문에 다양한 QoS 요구를 동시에 만족시킬 수 있는 QoS 제어기법이 가입자 망에서 필요하다. 본 논문에서는 가입자 망 중에서 설치가 용이하고 유지 보수가 저렴하며, 가입자의 이동성을 제공할 수 있는 무선 가입자 망 환경에서 새로운 QoS 제어기법인 W-JoBS 방법을 제안하였다. W-JoBS 기법은 기존의 JoBS 기법을 무선 가입자 망에 효율적으로 적용하기 위해 채널오류가 빈번하게 발생하는 무선채널 환경에서 트래픽 클래스 간의 공정성을 보장하기 위해 서비스 보상기법과 채널상태를 고려한 스케줄링 기법을 추가한 새로운 개념의 QoS 제어기법이다. 컴퓨터 시뮬레이션을 통하여 성능평가를 수행하였고, 수치계산결과를 통해 무선 가입자 망 환경에서W-JoBS 기법이 기존 JoBS 기법에 비해 우수함을 보였다.

• 전기학회논문지
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• 제65권1호
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• pp.128-134
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• 2016

IoT devices including smart devices are connected with internet, thus they have security threats everytime. Particularly, IoT devices are composed of low performance MCU and small-capacity memory because they are miniaturized, so they are likely to be exposed to various security threats like DoS attacks. In addition, in case of IoT devices installed for a remote place, it's not easy for users to control continuously them and to install immediately security patch for them. For most of IoT devices connected directly with internet under user's intention, devices exposed to outside by setting IoT gateway, and devices exposed to outside by the DMZ function or Port Forwarding function of router, specific protocol for IoT services was used and the devices show a response when services about related protocol are required from outside. From internet search engine for IoT devices, IP addresses are inspected on the basis of protocol mainly used for IoT devices and then IP addresses showing a response are maintained as database, so that users can utilize related information. Specially, IoT devices using HTTP and HTTPS protocol, which are used at usual web server, are easily searched at usual search engines like Google as well as search engine for the sole IoT devices. Ill-intentioned attackers get the IP addresses of vulnerable devices from search engine and try to attack the devices. The purpose of this study is to find the problems arisen when HTTP, HTTPS, CoAP, SOAP, and RestFUL protocols used for IoT devices are detected by search engine and are maintained as database, and to seek the solution for the problems. In particular, when the user ID and password of IoT devices set by manufacturing factory are still same or the already known vulnerabilities of IoT devices are not patched, the dangerousness of the IoT devices and its related solution were found in this study.

• Asian Pacific Journal of Cancer Prevention
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• 제15권18호
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• pp.7679-7686
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• 2014

Background: This study aimed to seek insights into Chinese women's lay beliefs about cervical cancer causal attributions and prevention. Materials and Methods: Twenty-three new immigrant adult women from Mainland China and thirty-five Hong Kong adult women underwent semi-structured in-depth interviews. Interviews were audio taped, transcribed and analyzed using a Grounded Theory approach. Results: This study generated three foci: causal beliefs about cervical cancer, perceived risk of cervical cancer, and beliefs about cervical cancer prevention. Personal risky practices, contaminated food and environment pollution were perceived as the primary causes of cervical cancer. New immigrant women more likely attributed cervical cancer to external factors. Most participants perceived cervical cancer as an important common fatal female cancer with increased risk/prevalence. Many participants, particularly new immigrant women participants, expressed helplessness about cervical cancer prevention due to lack of knowledge of prevention, it being perceived as beyond individual control. Many new immigrant participants had never undergone regular cervical screening while almost all Hong Kong participants had done so. Conclusions: Some Chinese women hold pessimistic beliefs about cervical cancer prevention with inadequate knowledge about risk factors. Future cervical cancer prevention programs should provide more information and include capacity building to increase Chinese women's knowledge and self-efficacy towards cervical cancer prevention.

• Journal of Preventive Medicine and Public Health
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• 제51권2호
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• pp.64-70
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• 2018

Objectives: In most countries around the world, sex work is an illegal activity. Female sex workers (FSWs) in Iran hide their identities, and they are known to be a hard-to-reach population. Despite free access to HIV testing, fewer than half of FSWs receive HIV testing. The purpose of this study was to characterize the reasons for which FSWs do not seek testing at drop-in centers (DICs) and voluntary counseling and testing (VCT) centers in Iran. Methods: A qualitative study was conducted in 2016. The participants were 24 FSWs who received services at VCT centers and DICs for vulnerable females in the north of Iran and 9 males who were the clients of FSWs. In this study, we made use of purposive sampling and carried out a thematic analysis. Results: We found 4 major and 6 minor themes. The major themes were: fear of being infected (with HIV), stigma, indifference, and knowledge. Conclusions: Despite the significant efforts made by the government of Iran to establish and expand DICs for vulnerable females, the number of FSWs receiving services at these centers has not been very considerable. Consequently, by introducing and implementing training programs for peer groups, it may be possible to take steps toward establishing strategic programs for the control and prevention of HIV/AIDS.

• 농촌계획
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• 제17권1호
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• pp.89-98
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• 2011

Recently, the food industry has evolved into a new and innovative trend according to its globalization and change of food consumption patterns. However, it is hard for the traditional food industry in Korea to meet the changing consumers' needs because of its poorer quality control and lower industrialization technology than other advanced industries. Also the knowledges acquired through a lot of time and efforts would be lost after the human resources with tacit knowledges leave by their too much aging. Especially, the 21st century would be called as knowledge based society which means that knowledge be the important contributing factor in the economic growth. In this regard, this study aimed at proposing the knowledge based system for systematically managing or preserving knowledges of Mosisongpyun industry in Yeonggwang County to seek for the sustainable development of the traditional food industry in Korea. The knowledge based system of Mosisongpyun industry in Yeonggwang County is finally proposed as follows; First, hardware is composed with the necessary unit facilities such as interpretive center, learning and experience room, library, etc. And the integrating facilities such as Mosisongpyun theme park, traditional village, and knowledge industrialization support center are proposed. Second, software is composed with the necessary unit softwares such as the preservation manual of traditional knowledge and skill, web-site administrator, development of graded textbooks, development database software, etc. And the integrating softwares such as development of innovation and management ability in Mosisongpyun industry are proposed. Third, humanware is composed with the necessary unit programs such as exhibition, own training program, incubator support system, etc. And the integrating programs such as the farm association corporation, the testing and research institute, the institution of learning and training are proposed.

• 한국학교보건학회지
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• 제19권2호
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• pp.59-74
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• 2006

Purpose : The principal objective of this study was to develop adequate health promotion programs satisfying the needs of high school students by exploring a variety of factors that affected their participation in these programs. This research was also designed to serve as preliminary data for the development of health promotion programs that will encourage active student participation. Methods : The study used a descriptive correlational design. The study participants were 658 coeducational high school students in Seoul, consisting of 317 9th graders and 341 10th graders. For this study, 599 structured questionnaires were selected. The survey was conducted for the period from December 12, 2005 to December 23, 2005. Results : Overall, students surveyed in this research showed relatively active participation in health-promoting behaviors. Among 5 dimensions, interpersonal support received the highest score while health responsibility ranked the lowest. Another finding was that posture correction program enjoyed the strongest student participation (75.5%) followed by stress management program(70.1%) and weight control program (56.6%). On the other hand, the participation rates for no-drinking(12.9%), smoking cessation program(17.0%), and influenza prevention program(22.9%) were at the low end. Multiple logistic regression results indicate that the higher interpersonal support score of health promoting behaviors gets, the higher student participation becomes. Conclusion : The study demonstrated that student participation was determined by the nature of health-promoting programs, demographic characteristics and health related physical fitness. It also showed that the sub-scales of the programs played a bigger role in student participation. Keeping this in mind, a wealth of health-enhancing programs of distinguishing qualities need to be tailored to meet various needs of students. In addition, serious efforts should be made to motivate them to seek relevant health promotion programs.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 1999년도 Pre-symposium of the 10th ISWPC Recent Advances in Paper Science and Technology
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• pp.309-314
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• 1999

With a view to seek the influence of hollow sphere pigments of latex upon the printed color on coated paper surface, the hollow sphere pigments were compared with filled ones in a variety of experimental approaches. Colloidal properties of latices were determined by measuring zeta potential and particle size distribution. For the amphoteric filled sphere pigment of latex, the polarity was reversed from the negative side to the positive side with decreasing pH. An extraordinarily high peak in the particle size distribution of the amphoteric filled evidenced aggregation between latex particles near the isoelectric point, depending on the electrolyte concentration and pH of the suspending medium. Coated papers containing the hollow sphere pigment in their coating improved optical properties like gloss and brightness. Optical parameters solely of the coating could account for this finding. An equation derived from the Kubelka-Munk equation calculated them fro twice measurements of reflectance of a coated paper over two substrates of different reflectances. This method permitted to predict brightness of coated paper of which coat weight would be different fro the actual one. The colorimetric parameters of solid-printed surfaces of the coated papers closely related to optical and structural properties of the coated papers. The color of the printed surfaces was dominated by the brightness and the smoothness of the coated papers. The hollow sphere pigments were proved to improve optical properties of coated paper and to control minutely colorimetric parameters of printed surfaces.

• 대한간호학회지
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• 제22권2호
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• pp.127-142
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• 1992

The purpose of this study was to identify relationships between the nursing performance of staff nurses and the leadership styles of head as perceived by the head nurses and the staff nurses. The subject consisted of 33 head nurses and 200 staff nurses who were working at SNUH between July 1, and July 31, 1991. Leadership styles as perceived by head nurses and staff nurses were measured using an instrument adapted by Park (1988) . Evaluations of the nursing performance of staff nurses were done by head nurses utilizing a questionnaire adopted by Park(1988). Data were analysed using percentage distribution, ANOVA, Scheffe test and Pearson Correlation Coefficient. The results are summarized as follows : 1. The majority of the head nurses and staff nurses perceived the head nurse as having a tendency to exercise high level authority and benevolence oriented leadership. 2. The majority of the staff nurses carried out their nursing performance in a highly skilled manner. 3. There were significant differences in perceptions of leadership style between head nurses and staff nurses. 4. “Authority” and “Benevolence” in leadership style as perceived by the head nurses were related very weakly to the nursing performance of the staff nurse. 5. “Benevolence” of leadership style as perceived by the staff nurses was related very weakly to the nursing performance of the staff nurse. 6. Group comparisons of nursing performance and leadership style found that high nursing performance by the staff nurse was related in the group with high “Authority” as perceived by the head nurse and low “Authority” as perceived by the staff nurse. From the above findings, this study suggests the following : 1) Further studies are needed to control extraneous variables. 2) Efforts in leadership development are needed to enhance nursing performance. 3) Factor exploration study are needed to seek factors that contribute to the perception gap between the head nurse and the staff nurse.