• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.69-72
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• 2018

최근 증가하고 있는 자유개별여행자들의 경우 항공권, 숙박 등의 여행상품을 개별로 구매하고 여행지에서 지역 여행정보를 통해 여행상품을 구매한다. 일반적인 여행 앱에서는 여행자에게 일괄적으로 관광 상품 메시지를 전송한다. 하지만 해당 여행지에 대한 정보 메시지를 여행 시간대별로 받는다면 여행자는 그 정보를 토대로 좀 더 다양한 여행을 즐길 수 있으며, 해당 지역의 여행 상품을 판매하는 판매자의 경우 효과적인 홍보 마케팅이 이루어질 것으로 사료된다. 따라서 본 연구에서는 해당 여행지를 여행하고 있는 여행자에게 스케줄링된 여행정보를 주기적으로 전송할 수 있는 FCM기반의 푸시서비스 개발을 목적으로 하였다.

• Information Systems Review
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• v.11 no.1
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• pp.197-215
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• 2009

As the ubiquitous technology has been widespread, the u-service development driven by the private sector is increasing these days. In this paper, a new development methodology of interactive u-services for a mixed-use complex in u-City is proposed. The current state-of-the-art IT, Web2.0, assumes that information must be communicated in both way, not only from service provides to users but also from users to service providers. Here the user-driven u-service will be utilized for service providers to customize user services. By this interactive u-service paradigm, the information users become the information providers so that the mixed-use complex will take advantage of massive information. Also, admitting that the mixed-use complex is limited in terms of the space size, the network effect of information and shared contents created through the interactive u-services can be maximized.

• The KIPS Transactions:PartD
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• v.13D no.6 s.109
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• pp.847-856
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• 2006

In this paper, we suggested a mobile collaboration framework for supporting mobile services among mobile devices, and designed and implemented on this environment. The suggested framework has three elements; groups of sensors and mobile devices(Fixed and Moving-typed PDAs) and a home server. We designed interfaces for interactions with each other in collaboration environment with three elements described above. The information collected by sensors can be share and exchanged by mobile devices or a home server in accordance with Push and Pull methods. This framework is based on the distributed object group framework(DOGF) we implemented before. Therefore the DOGF provides functions of object group management, storing information and security services to our mobile collaboration framework via application interfaces defined. The information collected by sensors is arranged according to user's security 'demands. And user profile information is used for checking authority of each service object. Each component for executing functions of mobile devices and a home server is implemented by TMO scheme. And we used the TMOSM for interactions between distributed components. Finally, we showed via GUI the executablity of a given healthcare application scenario on our mobile collaboration framework.

• Journal of Internet Computing and Services
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• v.13 no.2
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• pp.33-40
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• 2012

Recently, according to increasing the network traffic in the IMS, the role of Network Management System (NMS) is very important because of limited network resource. NMS can perform two kinds of routing ways with the capability of static or dynamic routing. The way of A dynamic routing is more efficient than static routing one because it can make the flow of traffic changeful among nodes in the IMS. Therefore, in this paper, we suggest a management function of NMS, using a dynamic routing algorithm for managing the CSCFs in the IMS. And then we analyze the algorithm by measuring the performance of PoC, one of the prominent application services to be deployed in the IMS.

• Journal of Digital Convergence
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• v.11 no.12
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• pp.821-828
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• 2013

This paper proposed CHELS-App that Smart-phone APP optimized cultural heritage experiential learning is configured can learning and sightseeing at the same time with experience the cultural heritage and enjoying the mission through quests to take advantage of the Smart-phone. CHELS-App is provide a guide maps by using the location-based service and cultural commentary(commentary, photos, quizzes, games, cartoon) with capability of event push about the Jongmyo Shrine as world heritage, and configured with capability of experience diary create and foot stamp through these experiences.

• Journal of the Korean Society for information Management
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• v.36 no.2
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• pp.31-56
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• 2019

The user satisfaction and needs of an academic library were caught through a questionnaire survey in this study. The aim of this study is to draw up the CRM based plan for meeting user needs on the study. The users' demographic information, library resources & their use, homepage, services, and facilities/environment of the library were categorized in the questionnaire and analyzed for this study. The major conclusions of this study are: (1) The library resources use was the highest, and its facilities/environment was the lowest in the user satisfaction study. It also revealed that there are much necessities for the quick acquisition and dissemination of the requested material to the library users, and for the inter-library loan (ILL) services among campuses for the subscription books in the library resources use study, too; (2) There are a lot of necessities for the improvement of OPAC retrieval and the subscription books system, and menu rearrangement in the library homepage; (3) There are a lot of necessities for the plans of more frequent library event, more detailed event guidance, and more reinforcement of public relations such as SMS, push services of SDI etc. in the library user services; and (4) There are a lot of necessities for the improved policies to the complaints of library users such as the lack of common study place and lockers, air conditioning and heating problem, complaints about facilities management of restroom (lack of toilet paper), library accessibility on campus, unauthorized user management etc. in the facilities/environment of the library.

• Proceedings of the Technology Innovation Conference
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• 2003.02a
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• pp.81-100
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• 2003

최근 이동통신기술이 급속히 발달함에 따라 국내는 물론 전세계 이동통신업계는 제 3세대 이동통신서비스의 성공여부에 많은 관심을 쏟고 있다. 지금까지의 이동통신산업의 성장이 빠른 기술개발에 의존한 기술추동적(technology-push) 성격을 지녔다면, 이동통신시장이 포화상태에 근접하고 있는 최근에는 서비스 및 장비 양면에서의 경쟁이 치열해 짐으로써 소비자의 기술에 대한 선택이 더욱 중요해짐에 따라 수요견인적(demand-pull) 기술혁신이 예상된다. 따라서, 이동통신서비스의 확대에 따른 특정기술에 대한 소비자의 선호에 대한 올바른 판단이 향후 산업의 기술진화방향을 예측하는데 핵심적인 역할을 할 것으로 생각된다. 현재 이동통신기술의 진보의 키워드는 '멀티미디어화'이다 향후 VOD (Video On Demand) 등 비디오 스트리밍(video streaming) 기술을 이용한 동영상 서비스, 화상전화, 타 디지털기기(예를 들어 PDA, 디지털 카메라 등)와의 융합 등의 서비스가 본격화되고 차세대 이동통신망의 구축이 가시화됨에 따라 이동통신의 멀티미디어 기능은 더욱 주목받게 될 것이다. 따라서 이동전화 단말기 창의 컬러화는 이러한 이동통신기술의 새로운 패러다임을 떠받치고 있는 가장 중요한 이정표로서의 의미를 지니고 있다. 본 연구에서는 표시1창의 컬러화로 실현되는 기술혁신요소에 대해서 소비자가 부여하는 가치를 분석하고자 한다. 하지만, 컬러 단말기의 보급이 초기단계에 머무르고 있는 연구시점의 특성상 현시자료가 가용하지 않았기 때문에, 소비자에게 가상의 품질특성을 지닌 제품 조합을 제시하고 이에 대해 소비자가 순위를 매기게 함으로써 소비자의 선호를 측정하는 컨조인트(conjoint) 방법론을 사용하였으며, 소비자의 진술선호(stated preference)에 기초하여 이동통신단말기의 개별 특성에 대한 부분가치와 보상잉여를 측정하였다. 또한, 이를 통해 창의 컬러화로 인해 기대되는 초과이윤의 가능성 등 경제적인 효과들을 정량적으로 분석하고, 브랜드 가치 등 기존의 단말기 경쟁력 요소들과의 비교를 통하여 컬러화가 가져다 줄 경쟁요소들을 추정함으로서, 기술확산 메커니즘을 확인하고자 한다.

• Journal of Information Technology Services
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• v.19 no.5
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• pp.83-91
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• 2020

Language Models such as BERT has been an important factor of deep learning-based natural language processing. Pre-training the transformer-based language models would be computationally expensive since they are consist of deep and broad architecture and layers using an attention mechanism and also require huge amount of data to train. Hence, it became mandatory to do fine-tuning large pre-trained language models which are trained by Google or some companies can afford the resources and cost. There are various techniques for fine tuning the language models and this paper examines three techniques, which are data augmentation, tuning the hyper paramters and partly re-constructing the neural networks. For data augmentation, we use no-answer augmentation and back-translation method. Also, some useful combinations of hyper parameters are observed by conducting a number of experiments. Finally, we have GRU, LSTM networks to boost our model performance with adding those networks to BERT pre-trained model. We do fine-tuning the pre-trained korean-based language model through the methods mentioned above and push the F1 score from baseline up to 89.66. Moreover, some failure attempts give us important lessons and tell us the further direction in a good way.

• Annual Conference of KIPS
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• 2002.04a
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• pp.143-146
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• 2002

이동 전화로의 실시간 영상 전송 방법의 개념은 긴급상태 발생시 이동 전화에 빠른 경보기능과 현장의 상황을 실시간 영상 전송함으로서 사용자가 긴급상황에 따른 대책을 신속 정확히 할 수 있는 것을 의미한다. 하지만 이동 단말기 시스템 사양과 무선 인터넷 환경의 제약에 의해서 실시간으로 영상을 관측하기에는 다소 곤란하다. 즉 제한된 자원과 협소한 대역폭의 무선 인터넷 환경제약 등을 받는다. 이러한 환경 제약에서 사용자가 만족할 만한 서비스를 하기 위해서는 이동 전화에서 처리할 데이터 양을 최소화하고, 전송할 데이터의 앙도 최소화하는 방법이 유일한 대안이다. 이 논문에서는 실시간으로 캡쳐한 영상을 이동 전화에 전송하기 위하여 영상에서 픽셀의 평균 임계 값을 기준으로 WBMP로 변환하고, WAP PULL 과 PUSH 서비스 기반으로 영상을 실시간 전송하는 방법을 제안한다. 또한 캡쳐한 영상을 WBMP 포맷으로 변환하는 영상변환 필터 (WBMPFilter) 방법과 경보 상황 통보 및 영상을 전송할 수 있는 영상 전송 미디움(WirelessMedium) 방법에 대해 기술한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.12
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• pp.2871-2877
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• 2014

Real-time communication and diversification of multimedia application services using high-capacity data over the Internet demand high speed connection, and real-time and high-speed access internet service such as multimedia make Internet traffic increase rapidly. Meanwhile, QoS (Quality of Service) of internet service is not satisfied. In this situation, ISP (Internet Service Provider) has been required to improve service quality and extend network according to the user's needs. This request includes issue of extending network focused on increasing router and the number of routing table as well as simply extending bandwidth.