• ETRI Journal
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• 제44권3호
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• pp.476-490
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• 2022

With the recent advances in technology, automatic speech recognition (ASR) has been widely used in real-world applications. The efficiency of converting large amounts of speech into text accurately with limited resources has become more vital than ever. In this study, we propose a method to rapidly recognize a large speech database via a transformer-based end-to-end model. Transformers have improved the state-of-the-art performance in many fields. However, they are not easy to use for long sequences. In this study, various techniques to accelerate the recognition of real-world speeches are proposed and tested, including decoding via multiple-utterance-batched beam search, detecting end of speech based on a connectionist temporal classification (CTC), restricting the CTC-prefix score, and splitting long speeches into short segments. Experiments are conducted with the Librispeech dataset and the real-world Korean ASR tasks to verify the proposed methods. From the experiments, the proposed system can convert 8 h of speeches spoken at real-world meetings into text in less than 3 min with a 10.73% character error rate, which is 27.1% relatively lower than that of conventional systems.

• 한국항행학회논문지
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• 제17권3호
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• pp.306-313
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• 2013

본 논문에서는 스마트 홈 제어를 위한 유비쿼터스 가상현실이 탑재된 스마트 기기와 실세계를 동기화할 수 있는 정합시스템을 구현하였다. 제안하는 시스템은 유비쿼터스 가상현실이 탑재된 스마트기기, 실세계를 표현할 하드웨어 단말기 및 가상현실과 실세계를 정합하는 서버로 구성되며, 각 구성간의 통신은 ZigBee를 이용한 RF 통신과 TCP/IP 통신을 위한 자체 프로토콜을 설계하여 구현하였다. 제안된 유비쿼터스 가상현실의 주요 기능은 사용자 중심의 저작도구 형태로 사용자가 직접 실세계와 동일한 공간을 구성하여 실세계를 제어할 수 있다. 실험결과, 유비쿼터스 가상현실 기반의 스마트 기기와 하드웨어 단말간의 모니터링 확인 및 제어가 설계 규격대로 수행됨을 확인할 수 있었다.

• 한국ITS학회 논문지
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• 제21권5호
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• pp.67-77
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• 2022

본 연구에서는 고속도로 버스전용차로 단속시스템을 개발하여 현장 성능평가를 수행하였다. 영동고속도로 마성터널 입구 버스전용차로에서 조사한 결과, 버스전용차로를 위반하는 차량의 비율이 99%에 달하는 것으로 조사되었다. 하지만 현재의 경찰관에 의한 인력식 단속은 단속율도 낮고 불필요한 안전문제 및 지체를 발생시킨다. 고속도로 버스전용차로는 6인 이상 탑승한 9인승 이상 승합차도 통행이 가능하기 때문에 승합차량의 승차인원을 검지하는 기술개발이 필요하다. 조도에 관계없는 승차인원 검지를 위해 적외선 카메라를 사용하였고 짧은 차두시간을 감안한 신속한 영상처리 기법으로 YOLOv5 딥러닝 알고리즘을 사용하였다. 개발시스템 성능 검증을 위해 테스트베드 및 실 현장 평가를 실시한 결과, 테스트베드와 실 현장에서 각각 7%, 8% 오차를 나타내 만족할 만한 성능을 보였다. 본 연구 결과물을 현장에 적용할 경우 고속도로 버스전용차로 운영 효율화 및 단속에 따른 불필요한 지체를 감소시킬 수 있을 것으로 기대된다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 춘계학술대회 논문집
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• pp.512-515
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• 1996

A mass production system was implemented to reduce a manufacturing cost in a way of copying with a strong world market competition. However customer's demands are changing so rapidly and the mass production system is nolonger competitive to meet the demands. FMS (Flexible Manufacturing System) has been introduced as a replacement for the mass production system, but it still does not meet system's requirements. A new manufacturing system, called a holonic manufacturing system(HMS), is emerging. In this paper it is introduced an autonomous cooperative system under the concept of HMS.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 춘계종합학술대회
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• pp.231-234
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• 2007

본 연구는 섬진강 하구역의 효율적이고 체계적인 해역환경관리를 위하여 해양관측데이터 및 수치모델링 자료 그리고 MGIS를 이용한 해역환경 DB 구축, 가시화, 체계화 및 SVG 언어를 이용한 MGIS기반 Web GUI 시스템을 구축하였다. 그 결과 섬진강 하구역의 물리해양학적 특성을 체계적으로 구현하여 파악할 수 있음을 확인하였다.

• 한국CDE학회논문집
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• 제4권2호
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• pp.87-99
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• 1999

We developed a Part Information Brokering System, namely PIBS, that can inter-link part suppliers and buyers using WWW(World Wide Web). The major contribution of this paper is that the system provides a 3D collaboration environment that enables multiple users to share the same workspace where they cooperatively manipulate part features in real time. PIBS carries out two major functions: one to maintain part data in a part library, and the other to provide the means for the clients to cooperate. An object-oriented database is used for the part library which stores apart information registered by part suppliers. VRML(Virtual Reality Modeling Language) the ISO standard for 3D visualization on WWW, is used to represent 3D part models. Several Java programs have been implemented to support synchronous and a synchronous communication of the 3D models. Once the users are interconnected through the system, a user's manipulation of part objects is transparently and instantaneously transmitted to the others. This means that all the participants can are the same view and movement of the 3D part models. Since the system is developed using a Java applet-server architecture, it requires no additional software other than standard web browser. The prototype system has been successfully implemented, and demonstrated its applicability to virtual 3D part information sharing.

• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2006년도 춘계학술대회
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• pp.45-53
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• 2006

Ever since the computer came into being in early 20th century, rapid development of the information technology has led to the opening of the ubiquitous age where daily works can be done anywhere, anytime, and with any devices. The information technology has drawn attention from Customs around the world as a key means to fulfill multi-faced responsibilities of strengthening regional cooperation in the international trade, simplifying clearance procedures, expediting logistics flow, and ensuring security in the global supply chain. Korea Customs Service, which began the informatization effort by establishing the electronic export declaration system in 1992, completed the 100% electronic clearance system in 2000, with a number of countries now conducting benchmarking studies on the successful use of IT by KCS. This paper is to address the changes brought to the Customs administration in the information age, the progress and achievement of the Customs informatization as a proactive strategy to deal with the changing environment, and the exportation to overseas administration of the e-clearance system of KCS which strives to become the global leader of Customs informatization. The exportation. in particular, will not only lead to increased foreign currency earnings and shared know how, but also create an opportunity to reflect Korea's system in the standardization of Customs procedures around the world.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1996년도 The Korean Institute of Navigation 1996년도 춘계학술발표회 논문집
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• pp.59-76
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• 1996

Vessels in the world merchant fleet generally operate in either liner or bulk trade. The supply and the demand trend of general cargo ship are both on the ebb however those trend of tankers and containers are ins light ascension. Oil tankers are so far the largest single vessel type in the world fleet and the tanker market is often cited as a texbook example of perfect competition. Some shipping statistics in recent years show that there has been a radical fluctuation in spot charter rate under easy charter's market. This implies that the proper scheduling of tankers under spot market fluctuation has the great potential of improving the owner's profit and economic performance of shipping. This paper aims at developing the TS-DSS(Decision Support System for Tanker Scheduling) in the context of the importance of scheduling decisions. TS-DSS is defined as a DSS based on the optimization models for tanker scheduling. The system has been developed through the life cycle of systems analysis design and implementation to be user-friendly system. The performance of the system has been tested and examined by using the data edited under several tanker scheduling has been tested and examined by using the data edited under several tanker scheduling scenarios and thereby the effectiveness of TS-DSS is validated satisfactorily. The authors conclude the paper with the comments of the need of appropriate support environment such as data-based DSS and network system for successful implementatio of the TS-DSS.

• STI Policy Review
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• 제1권3호
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• pp.39-51
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• 2010

Korea faces challenges from the recent development catch-up countries and the absence of catch up incentives. For Korea to solve the issue of post catch-up problems and create a new development path based on creative innovation, there is an urgent need to secure a system design capability for the production of creative knowledge and talent that can create a competitive society. However, the conservative inclination and a lack of a customer-oriented attitude of Korean universities and professors leads to a standardization of talent and a passive restructuring of the curriculum by universities instead of a direct correspondence with the demands of companies and society. The compatibility of Korean university education with the demands of society remains the lowest in the world and creative education in Korea faces a difficult situation. The world is transforming from a knowledge-based economy to a creativity-based economy and a competitive society will led by creativity, not by knowledge. The success of a country in nurturing creative talent will determine its future national competitiveness. For Korea to be become a global leader in the new era of creativity, it needs to make proactive preparations. It is imperative for Korea to transform the educational system from the previous cramming system to a creativity-nurturing system.

• 한국실내디자인학회논문집
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• 제20권4호
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• pp.83-91
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• 2011

The purpose of this study is to set a relationship between intentional system and spatial orientation, and with space model in the human world to orient yourself is to present the basic spatial concepts. This is composed of parts of intentional system and spatial orientation on the research. Through the study of intentional system which is based on the orientation with Daniel Dennett's, it suggests the space-model that composed with aspects of intentionality and spatial elements. With space-model and judgement of spatial types, it makes relationship confirm between them. Through this process, following the results of this study were derived. First, intentional stance of space is the key for building knowledge and memories about space, and for identifying external environment images which are experienced in the senses of human. Second, changing the meaning from space to place makes horizons of space broader and creates a new sense of space with put the intentional orientation into the space. Third, this study can make confirm what the aspect of the space-schema-elements for orientation in space, serves as the presentation elements. This study leaps an old-view of the architectural customs about spatial orientation, and creates an opportunity to refine the newer concept of space. This concept of space is a basic essential for 'site-selection' and 'spot-catching' as an intentional system for spatial orientation and to establish a relationship with human beings in the world of his own orientation to the concept of space.