• Title/Summary/Keyword: 통신관리

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초등학생의 간식 구매 빈도 및 관련 식생태적 요인 분석연구

  • 강석아;이정원;구재옥
    • Proceedings of the KSCN Conference
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    • 2003.11a
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    • pp.1059-1059
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    • 2003
  • 최근 초등학생들은 간식은 물론 끼니를 위해서 스스로 식품이나 음식을 선택하고 구매하는 식생활 관리의 주체자가 되고 있다. 본 연구는 초등학생의 간식구매실태와 이에 영향을 미치는 식생태적 요인을 파악하고자, 서울과 충청남도의 대도시, 소도시 및 농촌의 4개 지역의 초등학생 4, 5, 6학년 총 431명(남 223, 여 208)과 그 학부모를 대상으로 간식섭취, PC와 TV 이용도, 학부모의 영양지식과 식태도, 간식구매빈도 등을 설문지 조사를 하였다. 조사대상 초등학생의 평균 신장과 체중은 교육부의 학생 신체검사 결과보다 약간 높거나 비슷하였으나, 조사대상의 30.6%가 저체중이고 10.8%가 비만이었다. 가정의 월 소득은 101-200만원이 가장 많았고(56.3%), 아버지는 대졸 이상이 59.7%, 어머니는 고졸 이상이 55.9%로 가장 많았으며, 어머니는 44.1%가 직업을 갖고 있었다. 학생의 월 용돈은 2,001-5,000원이 31.0%로 가장 많았으며 간식 비는 1일에 500원 미만이 46.0%로 가장 많았다. 간식섭취 빈도는 1일에 1번 섭취가 51.5%로 가장 많았고 간식 구매 시 고려사항은 맛, 가격, 영양가와 유통기한의 순 이었다. 조사대상의 46.9%가 PC통신 또는 인터넷을 사용하였고 사용시간은 1시간 미만이 53.8%로 가장 많았으며, 하루 평균 TV 시청시간은 2~4시간미만이 46.4%로 가장 많았다. 학부모의 평균 영양지식 점수는 13개 문항 중 8.16 $\pm$ 2.16으로서 평균 62.8%의 정답 율을 보였으며, 식 태도 점수는 총 50점 만점에 전체 평균이 43.22$\pm$4.04로서 비교적 양호하였다. 식품별 구매빈도를 보면 1주에 1회 이상으로 나타난 것은 우유, 과자류, 빙과류, 라면, 주스 및 껌의 순 이었고, 햄버거, 피자, 호떡은 한 달에 1회 또는 그 이하로서 가장 낮았다. 과자, 라면, 빙과류의 구매빈도는 가정수입과 아버지와 어머니의 교육수준과 음의 상관 관계를, 학생의 월 용돈, TV 시청시간 및 간식섭취 빈도가 높을수록 와는 양의 상관관계를 보였다. 라면과 탄산음료는 부모의 영양지식이나 식 태도와 음의 상관관계를 나타냈고, 햄버거 구매빈도는 가정수입과 아버지와 어머니의 교육수준이 높을수록 잦았다. 학생의 간식빈도가 높을수록 우유섭취빈도는 낮았으며, 과자, 빙과, 사탕, 닭 꼬치, 감자튀김, 돈까스, 튀김의 구매빈도가 증가하여 간식내용이 영양적으로 양호하지 않음을 알 수 있다. 또한 TV 시청시간이 길수록 간식빈도와 유사한 구매 양상을 나타냈다. PC이용시간이 길수록 과자와 빵의 구매빈도가 낮아지고 껌의 구매빈도가 높아져 흥미롭다. 결론적으로 조사대상 초등학생은 간식 구매시 영양가보다는 맛을 중요시하며, 우유를 제외하면 주로 탄수화물과 당류식품의 구매빈도가 높다. 또한 가정 소득, 부모 교육수준과 영양지식, TV시청시간, 학생의 간식 비와 간식빈도 등 환경요인들이 식품구매에 영향을 주었다. 따라서 영양사를 중심으로 간식 선택의 중요성과 식품 구매 원칙에 대한 체계적인 영양교육을 학생과 아울러 학부모에게도 실시하여 초등학생의 바른 간식 구매능력을 향상시켜야 할 것이다.

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Wearable antenna for Body area Network

  • Lim, Eng Gee;Wang, Zhao;Lee, Sanghyuk
    • Journal of Convergence Society for SMB
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    • v.3 no.2
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    • pp.27-32
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    • 2013
  • Wireless Body Area Networks (WBAN) have been made possible by the emergence of small and lightweight wireless systems such as Bluetooth, enabled devices and PDAs. Antennas are an essential part of any WBAN system and due to various technical requirements and physical constraints, careful consideration of their design and deployment is needed. This paper is proposing on the design of wearable antenna as parts of clothing to serve communications functions, such as tracking and navigation in health care applications. The substrates of the wearable antennas will be made from textile materials and since it is wearable, it should have a small size, be light weight, low maintenance, and unobtrusive. This proposed paper will also investigate the influence of different parameters for wearable antenna including types of textile/substrate to ensure that the antenna design satisfies WBAN requirements. The characteristics and behavior of the antenna need to adhere to specifications set by wireless standards and system technology requirements. This means that the transmitting and receiving frequency bands of the various units need to be chosen accordingly. Since there are restrictions on the level of power to which the human body can be exposed to, the antenna as well as other RF system components must be designed to meet these restrictions. Antenna gain, which directly affects power transmitted, is a critical parameter in ensuring power levels fall within the safety guidelines and so will be of primary importance in the design. The electromagnetic interaction between WBAN antennas and devices and the human body will also be explored.

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A Bloom Filter Application of Network Processor for High-Speed Filtering Buffer-Overflow Worm (버퍼 오버플로우 웜 고속 필터링을 위한 네트워크 프로세서의 Bloom Filter 활용)

  • Kim Ik-Kyun;Oh Jin-Tae;Jang Jong-Soo;Sohn Sung-Won;Han Ki-Jun
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.7 s.349
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    • pp.93-103
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    • 2006
  • Network solutions for protecting against worm attacks that complement partial end system patch deployment is a pressing problem. In the content-based worm filtering, the challenges focus on the detection accuracy and its performance enhancement problem. We present a worm filter architecture using the bloom filter for deployment at high-speed transit points on the Internet, including firewalls and gateways. Content-based packet filtering at multi-gigabit line rates, in general, is a challenging problem due to the signature explosion problem that curtails performance. We show that for worm malware, in particular, buffer overflow worms which comprise a large segment of recent outbreaks, scalable -- accurate, cut-through, and extensible -- filtering performance is feasible. We demonstrate the efficacy of the design by implementing it on an Intel IXP network processor platform with gigabit interfaces. We benchmark the worm filter network appliance on a suite of current/past worms, showing multi-gigabit line speed filtering prowess with minimal footprint on end-to-end network performance.

The effect of job stress of system maintenance staff on emotion exhaustion: Focusing on the moderating effect of professional identity (정보시스템 운영인력의 직무 스트레스가 정서적 소진에 미치는 영향: 전문직 정체성의 조절효과를 중심으로)

  • Lee, Ji-Eun;Lim, Hee-Jeong
    • Journal of Digital Convergence
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    • v.16 no.7
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    • pp.97-105
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    • 2018
  • The fourth industrial revolution is expected to bring about great changes in information technology sector and create a variety of jobs. However, the psychological anxiety of IT staff is increasing due to stress and uncertainty created by the new technologies. Accordingly, researchers examined how professional identity moderate the effect of job stress of system maintenance staff on emotion exhaustion. For empirical studies, data was collected from 160 employees responsible for managing and supporting IS, and the hypothesis was verified using SPSS 21. The analysis results showed that role conflicts, role ambiguity, and qualitative work overload, which are components of job stress, have affected the emotion exhaustion. Professional identity had a moderating effect the relationship between qualitative work overload and emotion exhaustion. On the other hand, professional identity did not moderate the relationship between role conflict and emotion exhaustion, role ambiguity and emotion exhaustion. As professional identity lessen the psychological burden and emotion exhaustion of introducing new technologies, organizations need to provide support to enhance professional identity for system maintenance staff.

The Effect of Perceived Information Control on the Knowledge Sharing Intention of the Social Network Service Users (인지된 정보 통제가 소셜 네트워크 이용자의 정보 제공 의도에 미치는 영향)

  • Lee, Un-Kon;Kim, Kyong Kyu;Song, Ho Hyeon
    • The Journal of Society for e-Business Studies
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    • v.18 no.1
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    • pp.107-127
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    • 2013
  • The evolution of IT facilitated the communication and knowledge sharing between the social network service (SNS) users. When the more information about SNS users had been posted in SNS site, SNS users had sometimes exposed in the risk of privacy invasion. To remedy this problem, we had introduced the information control mechanisms from the prior studies in data management to the SNS area and empirically validated the effect of these mechanisms in this research. Three information control mechanisms had been elected as access control, reference control and diffusion control. We had conducted a survey to the Facebook users which is the most famous SNS site. 459 data had been gathered and analyzed by PLS algorism. As the results, reference control and diffusion control has significantly increased the trust on SNS providers and decrease the privacy concern. This change could significantly affect on the satisfaction with the SNS site and knowledge sharing intention of SNS users. This study could introduce the new perspective about privacy protection issues in SNS area. Also, the information control mechanisms suggested in this study could contribute to make more robust privacy protection mechanisms in SNS site in practice.

국가전자도서관 DL 사례

  • 공봉석
    • Proceedings of the Korea Database Society Conference
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    • 1998.09a
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    • pp.293-312
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    • 1998
  • $\square$ 정보화 혁명의 대국민 인식수단과 초고속정보통신망의 주요 응용 서비스로서 부각 $\square$ 전통적인 정보이용방법에 대한 이용자들의 인식의 변화로 도서관 활성화 방안으로써 정보통신기술의 도입 $\square$ 선진 각국의 전자도서관 구축의 국가적 추진 $\square$ 국내 초고속정보통신망의 구축과 보급 확대 $\square$ 모든 국민이 지역, 시간의 제약없이 도서관에 접근하여 필요한 자료를 획득 $\square$ 정보획득시간 단축으로 국내연구자들의 연구력 증진 $\square$ 정보화의 지역격차 해소 $\square$ 국내 도서관의 전자도서관 사업 촉진 $\square$ 주요 전자도서관의 통합연동체제를 마련 $\square$ 주요 도서관별 대상분야 조정으로 중복투자 방지 $\square$ 초고속정보통신망의 주요한 응용서비스로 가시화 - 초고속정보통신망의 선도적 대국민 가시화 - 이에 따른 민간부문의 참여 및 투자 촉진 $\square$ 국가, 산업, 국민생활 정보화의 주요한 기반 구축 $\square$ 지역적 정보불균형 해소 - 일부지역에 편중되어 있는 정보를 인터넷을 이용하여 시.공간 제약없이 제공함으로써 정보의 불균형 해소 $\square$ 전자도서관의 기본모델 제시 -전자도서관의 주요기능인 타기관간 자료연동 및 검색시스템을 구현함으로써 향후 구축되는 전자도서관의 기본모델 제시 $\square$ 전자도서관간 자료공유체제 구축 -시범사업 참여도서관간 분산 관리하고 있는 정보의 공유를 위한 표준체제 구축(중략) 것으로 나타났다.까지 증가율을 보여 주었다. 것으로 나타났다.대표하는 압밀계수의 추정이 가능할 것으로 사료된다. $O_3$/라는 결정학적 관계를 가지며 에피탁샬 성장했음을 알 수 있었다.있었다.다(p<0.05)..8800-0.6800로 각각 표시되었다.~$\pm$10 V의 측정범위에서 memory window가 계속 증가하는 것을 보여주었다./$^{\circ}C$의 고주파 유전특성을 얻었다. 얻었다.끼쳤다.보였다.다. 싸이클링 성능을 보였다.다.보였다.다.고 입력 반사손실을 그림 I, 2, 3에 각각 나타내었다. 대책을 요구하고 있다.하는 경향을 보였다. 생존율은 48시간째부터 폐사하기 시작하여 144시간째에는 전량폐사하였다. 삼투압 조절 능력을 위한 여러가지 파라메타에서 15 $\textperthousand$구는 이상이 없는 것으로 추측되나, 0 $\textperthousand$구에서는 코티졸, Na$^{+}$, K$^{+}$, Cl ̄, 총단백질 및 AST에서 시간경과에 따른 삼투압 조절 능력에 문제가 있는 것으로 보여진다.c}C$에서 5시간 가열조리 후 잔존율은 각각 84.7% 및 73.3%였고, 질소가스 통기하에서는 잔존율이 88.9% 및 81.8%로 더욱 안정하였다.8% 및 12.44%, 201일 이상의 경우 13.17% 및 11.30%로 201일 이상의 유기의 경우에만 대조구와 삭제 구간에 유의적인(p<0.05) 차이를 나타내었다.는 담수(淡水)에서 10%o의 해수(海水)로 이주된지 14일(日) 이후에 신장(腎臟)에서 수축된 것으로 나타났다. 30%o의 해수(海水)에 적응(適應)된 틸라피아의 평균 신사구체(腎絲球體)의 면적은 담수(淡水)에 적응된 개체의 면적보다 유의성

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Facilitating Web Service Taxonomy Generation : An Artificial Neural Network based Framework, A Prototype Systems, and Evaluation (인공신경망 기반 웹서비스 분류체계 생성 프레임워크의 실증적 평가)

  • Hwang, You-Sub
    • Journal of Intelligence and Information Systems
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    • v.16 no.2
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    • pp.33-54
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    • 2010
  • The World Wide Web is transitioning from being a mere collection of documents that contain useful information toward providing a collection of services that perform useful tasks. The emerging Web service technology has been envisioned as the next technological wave and is expected to play an important role in this recent transformation of the Web. By providing interoperable interface standards for application-to-application communication, Web services can be combined with component based software development to promote application interaction both within and across enterprises. To make Web services for service-oriented computing operational, it is important that Web service repositories not only be well-structured but also provide efficient tools for developers to find reusable Web service components that meet their needs. As the potential of Web services for service-oriented computing is being widely recognized, the demand for effective Web service discovery mechanisms is concomitantly growing. A number of public Web service repositories have been proposed, but the Web service taxonomy generation has not been satisfactorily addressed. Unfortunately, most existing Web service taxonomies are either too rudimentary to be useful or too hard to be maintained. In this paper, we propose a Web service taxonomy generation framework that combines an artificial neural network based clustering techniques with descriptive label generating and leverages the semantics of the XML-based service specification in WSDL documents. We believe that this is one of the first attempts at applying data mining techniques in the Web service discovery domain. We have developed a prototype system based on the proposed framework using an unsupervised artificial neural network and empirically evaluated the proposed approach and tool using real Web service descriptions drawn from operational Web service repositories. We report on some preliminary results demonstrating the efficacy of the proposed approach.

An Algorithm for Efficient use of Label Space over MPLS Network with Multiple Disconnent Timers (MPLS 망에서 복수 연결해제 타이머를 이용한 레이블 공간의 효율적 사용방법)

  • Lee, Sun-Woo;Byun, Tae-Young;Han, Ki-Jun;Jeong, Youn-Kwae
    • Journal of KIISE:Information Networking
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    • v.29 no.1
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    • pp.24-30
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    • 2002
  • Label switching technology is currently emerging as a solution for the rapidly growing of Internet traffic demand. Multiprotocol label switching(MPLS) is one of the standards made by the Internet Engineering Task Force(IETE) intended to enhance speed, scalability, and inter-opearability between label switching technologies. In MPLS, utilization of label space is a very important factor of network performance because labels are basic unit in packet switching. We propose a algorithm to effectively use label space by a multiple disconnect timer at the label switching router. Our algorithm is based on multiple utilization of the connection release timer over the MPLS network with multiple domains. In our algorithm, a relatively linger timeout interval is assigned to the traffic with higher class by the aid of the packet classifier. This reduces delay for making a new connection and also reduces the amount of packets which will be routed to the layer 3. Simulation results shows that reduction of required label number in MPLS network and this indicate our algorithm offers better performance than the existing ones in term of utilization of label space.

A Moving Object Query Process System for Mobile Recommendation Service (모바일 추천 서비스를 위한 이동 객체 질의 처리 시스템)

  • Park, Jeong-Seok;Shin, Moon-Sun;Ryu, Keun-Ho;Jung, Young-Jin
    • The KIPS Transactions:PartD
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    • v.14D no.7
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    • pp.707-718
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    • 2007
  • Recently, much studies for providing mobile users with suitable and useful content services, LBS(Location Based Service) corresponding to the change of users' location, are actively going on. First and foremost, this is basically owing to the progress of location management technologies such as GPS, mobile communication technology and the spread of personal devices like PDA and the cellular phones. Besides, the research scope of LBS has been changed from vehicle tracking and navigation services to intelligent and personalized services considering the changing information of conditions or environment where the users' are located. For example, it inputs the information such as heavy traffic, pollution, and accidents. The query languages which effectively search the stored vehicle and environment information have been studied depending on the increase of the information utilization. However, most of existing moving object query languages are not enough to provide a recommendation service for a user, because they can not be tested and evaluated in real world and did not consider changed environment information. In order to retrieve not only a vehicle location and environment condition but also use them, we suggest a moving object query language for recommendation service and implement a moving object query process system for supporting a query language. It can process a nearest neighbor query for recommendation service which considers various attributes such as a vehicle's location and direction, environment information. It can be applied to location based service application which utilizes the recommended factors based on environmental conditions.

Concurrency Control Using the Update Graph in Replicated Database Systems (중복 데이터베이스 시스템에서 갱신그래프를 이용한 동시성제어)

  • Choe, Hui-Yeong;Lee, Gwi-Sang;Hwang, Bu-Hyeon
    • The KIPS Transactions:PartD
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    • v.9D no.4
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    • pp.587-602
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    • 2002
  • Replicated database system was emerged to resolve the problem of reduction of the availability and the reliability due to the communication failures and site errors generated at centralized database system. But if update transactions are many occurred, the update is equally executed for all replicated data. Therefore, there are many problems the same thing a message overhead generated by synchronization and the reduce of concurrency happened because of delaying the transaction. In this paper, I propose a new concurrency control algorithm for enhancing the degree of parallelism of the transaction in fully replicated database designed to improve the availability and the reliability. To improve the system performance in the replicated database should be performed the last operations in the submitted site of transactions and be independently executed update-only transactions composed of write-only transactions in all sites. I propose concurrency control method to maintain the consistency of the replicated database and reflect the result of update-only transactions in all sites. The superiority of the proposed method has been tested from the respondence and withdrawal rate. The results confirm the superiority of the proposed technique over classical correlation based method.