• 인터넷정보학회논문지
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• 제5권3호
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• pp.87-98
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• 2004

일반 가입자들에게 초고속 인터넷 서비스를 제공하기 위해서 구성되는 가입자 망은ADSL, VDSL, DOCSIS 등 다양한 종류의 접속방식과 그에 따른 이기종(이기종)의 장비들로 이루어져 있다. 이러한 가입자 망은 전국적으로 분산되어 있으며, 분산된 가입자 망은 효과적이며 집중화된 형태로 관리하기 위해서는 다양한 형태의 접속방식을 지원하는 이기종 장비 및 단말들의 상위 개념으로서 추상적이며 논리적인 객체 관리모델이 필요하다. 본 논문은 통합된 계층적 망관리를 가능하게 하는 인터넷 가입자 망에 대한 모델링 구조론 RM-ODP흘 이용하여 제시하였다. 그리고 가입자 망의 예로서 UML을 이용한 객체지향 방법론을 채택하여 DOCSIS의 HFC 가입자망에 대한 관리 시스템을 설계하고 구현하였다.

• Journal of Information Science Theory and Practice
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• 제1권2호
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• pp.58-68
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• 2013

Citing literature is a very important activity for scholars in writing articles. Many publishers and libraries build citation databases and provide citation reports on scholarly journals. Cited-by linking is a service representing what an article cites and how many times it cites a specific article within a journal database. Recently, information services based on DOIs (Digital Object Identifiers) have been increasing in number. CrossRef, a non-profit organization for the DOI registration agency, maintains the DOI system and provides the cited-by linking service. Recently, the number of Korean journals adopting DOI is also rapidly increasing. The Korea Institute of Science and Technology Information (KISTI) supports Korean learned societies in DOI related activities in collaboration with CrossRef. This study analyzes cited patterns of Korean DOI journal articles using CrossRef's cited-by linking data and a Korean journal citation database. This analysis has been performed in terms of publication country and the language of journals citing Korean journal articles. The results show that DOI, SCI(E) (Science Citation Index (Expanded)), and English journals are more likely to be cited internationally.

• Journal of Communications and Networks
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• 제12권6호
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• pp.529-532
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• 2010

Multi-carrier demultiplexer/demodulator (MCDD) in an on-board processing (OBP) satellite used for digital multimedia services has two typical architectures according to the channel demultiplexing procedure: Multistage multi-carrier demultiplexer (M-MCD) or poly-phase fast Fourier transform (PPF). During the channel demultiplexing, phase and quantization errors influence the performance of MCDD; those errors affect the bit error rate (BER) performance of M-MCD and PPF differently. In this paper, we derive the phase error variances that satisfy the condition that M-MCD and PPF have the same signal to noise ratio according to quantization bits, and then, with these results, analyze the BER performances of M-MCD and PPF. The results provided here may be a useful reference for the selection of M-MCD or PPF in designing the MCDD in an OBP satellite communications system.

• 전기학회논문지
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• 제59권7호
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• pp.1327-1331
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• 2010

Association rules are very useful and interesting patterns for discovering preferences of each person in digital-content services. The Apriori algorithm is an influential algorithm for mining frequent itemsets for association rules. However, since this algorithm does not take into account reference times of each content as an important support factor, it cannot be used to extract associations among time-based data. This paper proposes an augmented Apriori algorithm discovers association rules using both frequencies and usage times of each item.

• 정보관리학회지
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• 제29권3호
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• pp.187-214
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• 2012

도서관은 시민의 지적자유를 보장하기 위해 설립된 기관이며, 시민은 그들이 요구하고, 접근하고, 이용한 정보가 기밀로 유지될 권리를 갖는다. 그들의 프라이버시 보호는 언론의 자유, 사고의 자유, 집회의 자유를 실현하는데 핵심이 된다. 도서관과 사서가 이용자의 프라이버시 문제를 심각하게 생각해야 하는 이유는 도서관 이용자의 개인정보 보호는 사서가 가장 중요하게 생각해야 하는 임무중의 하나이며, 이용자가 지적자유를 진정으로 누릴 수 있도록 하기 위함이다. 본 연구에서는 도서관에서 발생할 수 있는 프라이버시 침해가능성에 대해서 포괄적으로 조사 분석하고자 하였다. 그 결과 국가나 법률관련기관이 업무를 집행하는 과정에서 발생했던 프라이버시 침해 사례, 대출반납서비스, 참고서비스, 온라인탐색서비스 등 일상적인 도서관서비스를 하는 과정에서 발생했던 프라이버시 침해가능성 및 사례, 그리고 도서관업무를 아웃소싱하는 과정에서 발생할 수 있는 침해 가능성 및 사례 등이 있는 것으로 조사되었다.

• 한국IT서비스학회지
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• 제20권6호
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• pp.45-62
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• 2021

After the COVID-19 outbreak in 2019, the spread of COVID-19 has not been easily caught despite preventive measures in each country. The spread of COVID-19 has hit the world, especially in the economic and tourism sectors. Countries around the world are easing restrictions on the movement of vaccinated people in preparation for the post-corona era. Under the name of "Vaccine Passport," "Vaccination Certificate," and "Digital Health Pass," vaccination measures are being implemented to allow vaccination recipients to use multi-use facilities. However, there is no international agreement on the movement of countries, and each country has its own immigration policy. In order to return to pre-corona daily life, global agreements must be reached from the movement of vaccinated people between countries, and standards and implementation methods must be determined. This study focuses on the implementation and utilization of vaccination certificates suitable for the COVID-19 era. We will look at the spread of COVID-19 and its international response policies. In the case of COVID-19, we will investigate why vaccination certificate installation should be standardized and how far the current standardization has been discussed, and discuss the characteristics of vaccination certificate installation and considerations. In order for the immunization certificate discussed in the previous chapter to be recognized internationally, institutional and technical considerations are identified and security factors that may occur in each implementation are also presented. Finally, the international recognition case of vaccination certificate is discussed, and the method of installation and utilization of vaccination certificate is proposed. This paper can be used as a policy because of its timeliness in studying the standards of vaccination certificates and considerations for international recognition to restore movement between countries in the spread of COVID-19. In addition, if other infectious diseases occur in the future or similar cases where movement between countries is restricted, it can be used as a reference to support the movement of verified people.

• International Journal of Knowledge Content Development & Technology
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• 제14권1호
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• pp.19-31
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• 2024

In order to support the mission of the institution in which they are attached, academic libraries provide services in both manual and digital but COVID -19 pandemic that spanned between March and September, 2020 has changed the scenario. With particular reference to Nigeria, about 249,606 cases were confirmed and in order to curb the scourge of this deadly disease, physical academic activities were prevented by Nigeria Centre for Disease Control (NCDC). With this development, innovative tools became indispensable tools for successful delivery of library services in Nigerian academic libraries. Whether or not these tools are still in use for reformation of library service during post- Covid era remains unclear, hence, need for this study. This study examined librarians' use of innovative tools for information dissemination in Nigerian academic libraries during the post-Covid era using a descriptive survey design. Data were obtained both in quantitative and qualitative formats from one hundred and forty-four librarians as respondents. A total enumeration sampling technique was adopted because the population was minimal. Findings of the study revealed that innovative tools such as videoconferencing, WhatsApp, teleconferencing, Facebook, LinkedIn, and web-based learning applications are still in use by librarians for the dissemination of information during the post-Covid era. These tools are useful and beneficial to librarians during the post-COVID era, as they facilitate easy participation and engagement of library users in various discussions. Inadequate funding and lack of advanced technology skills were also identified as major impediments to the successful use of innovative tools for information dissemination. As a result, it was suggested that academic libraries throughout Nigeria prioritize staff training on the necessary digital skills needed to cope in this advanced technology era.

• 디지털융복합연구
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• 제14권10호
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• pp.393-398
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• 2016

이 연구는 편하게 주식 정보를 알 수 있는 주식 정보 애플리케이션에 대해 금융 전문가들의 사용자 경험은 어떤지 또한, 필요한 제안이 무엇인지 알아보았다. 연구방법은 금융 기관에서 3년 이상 재직한 금융 전문가 중 '카카오증권'과 '증권통'이라는 국내 최다 사용 증권 애플리케이션을 최소 6개월 이상 사용한 전문가 8명을 선별해 Stephen P. Anderson이 제안한 Creating Pleasurable Interface의 6단계 피라미드 구조의 요소들로 구성한 설문으로 심층 인터뷰를 진행하였다. 그 결과 카카오증권의 사용자 경험을 다소 높게 평가하였지만, 주식 정보를 구하는 애플리케이션인 만큼 유쾌성과 의미성에서 두 애플리케이션 모두 낮은 점수로 평가되었고, 앞으로 더욱 뛰어난 기능과 정확한 정보를 제공하는 것을 제안했다. 사용자들의 관심 주식을 파악한 콘텐츠 제공과 더욱 편리한 User Interface도 제안하였다. 이 연구를 바탕으로 더욱 다양한 온 오프라인 주식 정보 서비스의 사용자 경험을 연구하고, 이를 토대로 더 나은 사용자 경험을 제공하는 서비스 개발에 참고가 되길 기대한다.

• 정보통신설비학회논문지
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• 제1권1호
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• pp.6-25
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• 2002

본 논문에서는 인텔사(社)의 UPnP SDK vl.0을 임베디드 리눅스 시스템 개발 보드인 아사벳(assabet)보드에 포팅하고, UPnP SDK 패키지에서 제공하는 API를 이용하여 리눅스 PC에서 동작하는 UPnP Control Point와 임베디드 리눅스 시스템에서 동작하는 디지털 TV 에뮬레이터, 그리고 전등 제어기를 C언어로 구현하였다. 디지털 TV의 기능을 분석하여 UPnP서비스로 설계하고, 이를 UPnP 디바이스 프로그램에 적용하였다. 본 논문에서 사용한 UPnP SDK vl.04는 UPnP 홈 네트워킹 제어 미들웨어의 핵심 프로토콜 인 HTTP와 SSDP(Simple Service Discovery Protocol), SOAP(Simple Object Access Protocol), GENA(General Event Notification Architecture), 그리고, XML DOM Level-1을 리눅스에서 지원하기 위한 API 들로 들로 구성되어 있다. 본 논문에서 작성한 Control Point 프로그램은 리눅스 PC에서 실행시키고, 디지털 TV 에뮬레이터 프로그램과 전등제어기 프로그램은 임베디드 리눅스 보드에서 실행하였다. 실행된 Control Point는 네트워크에 연결된 디바이스들을 찾아 그 리스트를 콘솔에 출력하고, 디바이스가 제공하는 서비스를 콘솔입력으로 선택하여 실행시킨다. 본 논문에서 작성한 디바이스와 Control Point 프로그램이 UPnP의 핵심 기능들을 완벽하게 지원하는 것을 실험을 통해 확인하였다.

• 한국안전학회지
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• 제35권5호
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• pp.74-85
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• 2020

Smart phone zombie or Smombie means pedestrians who walk without attention to their surroundings because they are focused upon their smart phone. Because the traffic accidents and injuries caused by Smombie have been increased rapidly in recent years, the social attention and policies are needed to prevent it. This study was conducted to analyze Smombie's current status and some solutions used before and to propose new improved method through the latest ICT trend. In this study, we did the field survey to check Smombies at several places in Seoul through people counting, and found that a lot of pedestrians still use the smart phone while walking. And we analyzed many case studies about some solutions to prevent Smombies previously. The case studies include legal regulations, government policies, smart phone app services and facilities that are used before. We studied them through internet searches and reference studies and we also checked the current operating situation as visiting several places that the solutions actually has been operated. Therefore, we found there are some limitations in previous solutions in terms of effectiveness and management. To consider new solution that can be expected to overcome the limitations, we analyzed the latest ICT trends focused on features to utilize the Smombie prevention, especially video recognition and digital signage. In these days, video recognition has been developed rapidly with assistance of AI technology and it can recognize the specific pedestrian's characteristics such as holding smart phone as well as hair style, clothes, backpack and etc. On the other hands, the digital signage is the convergence device that includes big display, network connection and various IoT sensors. It can be used as public media in many places for public services as well as advertising. Through these analysis results, we show the requirements and the user scenario for the improved method to prevent Smombie. Finally, we propose to develop R&D technology to recognize Smombie exactly as pedestrian attributes and to spread creative contents to increase pedestrian's interest and engagement for Smombie prevention through digital signage.