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Multi-channel Audio Service in a Terrestrial-DMB System Using VSLI-Based Spatial Audio Coding
서정일,문한길,강경옥,홍재근,Seungkwon Beack 한국전자통신연구원 2005 ETRI Journal Vol.27 No.5
Spatial audio coding (SAC) is an extremely high compact representation of encoded multi-channel audio material. This paper suggests a multi-channel audio service in the terrestrial digital multimedia broadcasting (T-DMB) system using a novel SAC tool, which is called a virtual source location information (VSLI)-based SAC tool. Intensive experiments are presented to evaluate the validity of the proposed VSLI-based SAC tool, and prototypical systems are also presented to demonstrate the reliability of the proposed multi-channel T-DMB system in real applications.
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서정일,이동귀 한국상담심리학회 2022 한국심리학회지 상담 및 심리치료 Vol.34 No.4
The purpose of this study is to develop a postvention manual for secondary schools in Korea in the event of a student suicide. Existing studies and manuals were reviewed to identify potential guidelines. A focus group interview was conducted with 12 school staff members to identify the schools' current needs. Consequently, a draft manual with 33 postvention factors and 306 behavioral guidelines was created. The Delphi method was used to evaluate the necessity and feasibility of the preliminary guidelines. The expert panel of 16 people evaluated whether the suggested guidelines should be included in the manual on a 5-point Likert scale. The statements deemed necessary by 80% of the experts were selected. Finally, a postvention manual with five phases, 33 elements, and 277 items was developed. This study attempted to ensure the validity of the guidelines by using a systematic process, and contributed to more comprehensive postvention activities by augmenting strategies to manage SNS use and to support school staff. 본 연구는 학생 자살 발생 시 국내 중․고등학교에서 활용 가능한 사후개입 매뉴얼 개발을 목적으로 하였다. 이를 위해 먼저, 관련 국내․외 연구 및 매뉴얼을 검토하였으며, 포커스 그룹 인터뷰(FGI)를 실행하여 중등 교직원 12명을 대상으로 현장 요구 사항과 기존 매뉴얼의 제한점을 파악하였다. 이를 토대로 33개의 사후개입 요소와 306개의 행동 지침을 도출하여 매뉴얼 초안을 작성하였다. 이후 델파이 방법을 통해 사후개입 예비 지침에 대한 필요성 및 적절성을 2회에 거쳐 평가하였다. 델파이 조사에 참여한 전문가 패널은 16명으로, 각자 제시된 예비 지침이 매뉴얼에 포함되어야 하는지 여부를 리커트 5점 척도로 평가하였다. 평정 결과 전문가들이 4점 이상으로 평가한 비율이 80% 이상인 항목을 최종 지침으로 채택하였다. 이를 통해 사건 직후부터 중장기까지 총 다섯 단계의 시기와 위기관리위원회 소집, 위기학생 파악과 지원, 인터넷과 소셜미디어 모니터링 등 33개의 요소 및 277개의 행동 지침으로 이루어진 사후개입 매뉴얼을 완성하였다. 본 연구는 체계적인 과정을 통해 매뉴얼을 개발함으로써 지침의 타당성을 확보하고자 하였고, 기존 매뉴얼에서 제한적이었던 소셜미디어 사용에 대한 대처와 교직원 지원 방안을 보완함으로써 보다 포괄적인 사후개입 활동을 구안했다는 데 의의가 있다.
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농도구배와 평균속도가 삼지화염의 부상 특성에 미치는 영향에 관한 실험적 연구
서정일,김남일,오광철,신현동,Seo, Jeong-Il,Kim, Nam-Il,Oh, Kwang-Chul,Shin, Hyun-Dong 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.8
A triple flame in a mixing layer was studied experimentally with concentration gradient and mean velocity by using a multi-slot burner, which can stabilize the lift-off flame. Flame stabilization condition, lift-off heights, and some other characteristics were examined for methane and propane flame within a range of very low concentration gradient. Pitot-tube and LDV(Laser Doppler Velocimetry) were used for velocity. Mass spectroscopy and Rayleigh scattering signal were used for concentration gradients. Thermo-couples and SiC TFP(Thin Filament Pyrometer) were used for temperature. It was found that minimum values of the lift-off heights exist at a certain concentration gradient for constant mean velocity and this means that the propagation velocity has a maximum value. The scales of flame to the burner nozzle and intensity variation of the diffusion flame were suspected as the cause.
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남북상사중재위원회의 법적 성격 및 효율적 운영방안에 관한 연구
서정일 한국기업법학회 2005 企業法硏究 Vol.19 No.4
The Inter-Korea Commercial Arbitration Committee(the Arbitration Committee) should aim to regulate the application of legal standards which are developing in an increasingly commercial disputes in Korea. The Arbitration Committee is characterized by the gradual recognition of general standards in relation to inter-Korea commercial arbitration procedure. The Arbitration Committee has progressively become an autonomous discipline of the law applicable to the arbitration agreement, which regulates the obligation of the parties to settle inter-trade disputes by their local committee. The commercial arbitration system contributes usefully to the security and expansion of inter- Korea trade. The Arbitration Committee enables the parties to an arbitration to design their arbitral proceedings to suit their particular needs. With regard to the law governing arbitral procedure, this principle grants the parties the power to select suitable procedural rules by the Arbitration Committee. The arbitration rules should be applied by arbitral tribunal for its users' application in inter-Korea commercial arbitration. For the local arbitration committee and its users, the arbitration procedure must not only be good but it should also be known or at least easily ascertainable. When parties are trying to agree on a suitable local committee, their counsel yearn for ready access to the local law. If that information is not easily available, it may well be a reason for preferring their local committee. The above considerations suggest certain major conditions that an acceptable practice for inter-Korea commercial arbitration should meet. It should be good quality with solutions that are sound and suitable to the specific needs of inter-Korea arbitration system.
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