• 제목/요약/키워드: Alliance performance

검색결과 135건 처리시간 0.024초

와이미디어 통신네트워크의 멀티미디어 QoS 개선을 위한 분산협력방식 MAC 프로토콜 성능분석 (Performance Evaluation of Distributed Cooperative MAC Protocol Algorithm for Enhancing Multimedia QoS of WiMedia Communication Network)

  • 김진우;이연우;이성로
    • 한국멀티미디어학회논문지
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    • 제15권4호
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    • pp.516-525
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    • 2012
  • 본 논문에서는 와이미디어(WiMedia) 통신네트워크용 분산협력적 매체접근제어 프로토콜(D-MAC)의 멀티미디어 서비스 QoS를 개선하기 기법을 제안하였다. D-MAC방식은 고속 WPAN시스템에 적용하기 위한 것으로 기존에 제안된 중앙집중적 방식인 IEEE 802.15.3 프로토콜과 달리 모든 디바이스 장치들이 자원을 분산적 예약이 가능하게 하는 방식이다. 본 논문에서는 기존의 WiMedia 프로토콜에서는 채널의 링크 상태 변화를 적절하게 대처하지 못하여 발생하는 멀티미디어 QoS 감소문제를 해결하는 분산협력방식 DMAC 프로토콜 기법을 제안하여 성능을 분석하였다.

u-GIS 스마트 동기화를 위한 SyncML 기반 프레임워크 설계 (A Design of Framework based on SyncML for Smart Synchronization of u-GIS)

  • 이현섭;김진덕
    • 한국정보통신학회논문지
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    • 제12권6호
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    • pp.1039-1044
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    • 2008
  • 최근 모바일 컴퓨팅 기술과 하드웨어 기술의 발달과 무선 이동 단말기 성능의 급속한 진보로 모바일 단말기와 서버 간의 데이터 동기화에 대한 중요도가 점점 증가하고 있다. 또한 OMA(Open Mobile Alliance)에서는 SyncML(Synchronization Markup Language)를 이용한 표준 동기화 방법을 제안하여 권고 하고 있다. 그렇지만 동기화 대상이 되는 데이터는 일반적인 문서 데이터 및 스케줄러 등의 데이터로 다소 제한적이다. 본 논문에서는 이런 일반적인 데이터뿐만 아니라 응용 가치가 높은 GIS 데이터를 효과적으로 동기화하기 위한 SyncML 기반 표준 프레임워크를 제시한다. 이를 SCGFG(SyncML Combination GML For GIS)라 한다. SCGFG는 국제 GIS 표준으로 사용되고 있는 GML을 응용한다. 또한 XML 포맷을 사용하여 SyncML과 GML에서 발생되는 데이터 크기의 증가 문제를 효과적으로 제거한다. 제안한 SCGFG는 여러 개의 서버와 여러 개의 클라이언트간의 GIS 데이터 스마트 동기화를 원활하게 지원한다.

Effects of hot-melt extruded nano-copper on the Cu bioavailability and growth of broiler chickens

  • Lee, JunHyung;Hosseindoust, Abdolreza;Kim, MinJu;Kim, KwangYeol;Kim, TaeGyun;Moturi, Joseph;Chae, ByungJo
    • Journal of Animal Science and Technology
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    • 제63권2호
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    • pp.295-304
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    • 2021
  • This study was aimed to investigate the Cu bioavailability, growth response, digestibility of nutrients, and blood metabolites of broiler chicks fed CuSO4 in nano or common forms. A total of 720 broiler chickens were distributed between eight treatments according to a completely randomized design. There were 8 treatments and 6 replicates in each treatment with 15 birds/replicate. The treatments were divided into common copper sulfate at the doses of 16 ppm, 40 ppm, 80 ppm, and 120 ppm (INO) and hot-melt extruded copper sulfate at the doses of 16 ppm, 40 ppm, 80 ppm, and 120 ppm (HME-Cu). The experiment was operated for 35 days in 2 phases (phase 1, d 0 to 14; and phase 2, d 15 to 35). No significant differences were shown in growth performance, feed intake, FCR, and nutrient digestibility among the treatments. The concentration of Cu in the serum was increased in the HME-Cu broilers compared with the INO broilers at phase 2. A linear increase was observed in the concentration of Cu in the liver in broilers fed INO diets, however, no significant differences were observed by the supplementation of HME-Cu levels. The linear increase was detected in the content of Cu in excreta in the INO and HME-Cu treatments by increasing the dietary Cu content. The HME-Cu treatments showed a lower Cu concentration in the excreta compared with the INO treatments. The higher bioavailability of Cu in HME form can decrease the recommended dose of Cu in broiler diets.

Development of an Object-Relational IFC Server

  • Hoon-sig Kang;Ghang Lee
    • 국제학술발표논문집
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    • The 3th International Conference on Construction Engineering and Project Management
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    • pp.1346-1351
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    • 2009
  • In this paper we propose a framework for an Object Relational IFC Server (OR-IFC Server). Enormous amounts of information are generated in each project. Today, many BIM systems are developed by various CAD software vendors. Industry Foundation Classes (IFC) developed by International Alliance for Interoperability (IAI) is an open standard data model for exchanging data between the various BIM tools. The IFC provides a foundation for exchanging and sharing of information directly between software applications and define a shared building project model. The IFC model server is a database management system that can keep track of transactions, modifications, and deletions. It plays a role as an information hub for storing and sharing information between various parties involved in construction projects. Users can communicate with each other via the internet and utilize functions implemented in the model server such as partial data import/export, file merge, version control, etc. IFC model servers using relational database systems have been developed. However, they suffered from slow performance and long transaction time due to a complex mapping process between the IFC structure and a relational-database structure because the IFC model schema is defined in the EXPRESS language which is object-favored language. In order to simplify the mapping process, we developed a set of rules to map the IFC model to an object-relational database (ORDB). Once the database has been configured, only those pieces of information that are required for a specific information-exchange scenario are extracted using the pre-defined information delivery manual (IDM). Therefore, file sizes will be reduced when exchanging data, meaning that files can now be effectively exchanged and shared. In this study, the framework of the IFC server using ORDB and IDM and the method to develop it will be examined.

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대학 펜싱선수들의 심리교육 효과: 자원동원성 수준에 따른 심리기술과 자기관리행동의 변화를 중심으로 (The change of Psychological skills strategy and Self-management behavior according to the level of Resourcefulness of Fencing-Athlete)

  • 이현영;장덕선
    • 한국체육학회지인문사회과학편
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    • 제54권5호
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    • pp.251-260
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    • 2015
  • 본 연구에서는 대학 펜싱선수들을 대상으로 심리교육을 중재한 후 자원동원성 수준에 따라 심리기술과 자기관리행동이 어떻게 변화하는지 탐색하여 참여자의 심리적 역량에 따른 중재의 효과성을 검증하고자 하였다. 대학 펜싱 선수(남 10명, 여 10명) 20명을 연구 참여자로 선정하였으며, 심리교육은 지도자와 참여자에게 동의를 구한 후 팀의 훈련 및 시합일정을 고려하여 12회기를 실시하였다. 시행시간은 주 1회, 60-90분 정도 소요되었으며, 심리 교육의 효과를 확인하기 위하여 1회기와 12회기에 자원동원성, 심리기술, 자기관리행동을 탐색하였다. 특히 자원동원성은 연구 참여자들의 사전 평균점수를 기준으로 고/저 집단으로 나누어 분석에 활용하였다. 연구 결과는 다음과 같다. 첫째, 자원동원성 고집단에서는 심리기술 하위요인 중 집중력, 심상에서 유의미한 변화를 보였으며, 저집단에서는 극복의지, 목표설정, 자신감, 집중력, 심상 요인에서 유의미한 변화를 나타내었다. 둘째, 자원동원성 고집단에서는 자기관리 하위요인 중 몸관리에서 유의미한 변화를 보였고 자원동원성 저집단에서는 훈련관리에서 유의미한 변화를 보여 자원동원성 수준에 따라 다른 변화를 보였다.

중국군의 해양작전능력과 한국군의 과제 (PRC Maritime Operational Capability and the Task for the ROK Military)

  • 김민석
    • Strategy21
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    • 통권33호
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    • pp.65-112
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    • 2014
  • Recent trends show that the PRC has stepped aside its "army-centered approach" and placed greater emphasis on its Navy and Air Force for a wider range of operations, thereby reducing its ground force and harnessing its economic power and military technology into naval development. A quantitative growth of the PLA Navy itself is no surprise as this is not a recent phenomenon. Now is the time to pay closer attention to the level of PRC naval force's performance and the extent of its warfighting capacity in the maritime domain. It is also worth asking what China can do with its widening naval power foundation. In short, it is time to delve into several possible scenarios I which the PRC poses a real threat. With this in mind, in Section Two the paper seeks to observe the construction progress of PRC's naval power and its future prospects up to the year 2020, and categorize time frame according to its major force improvement trends. By analyzing qualitative improvements made over time, such as the scale of investment and the number of ships compared to increase in displacement (tonnage), this paper attempts to identify salient features in the construction of naval power. Chapter Three sets out performance evaluation on each type of PRC naval ships as well as capabilities of the Navy, Air Force, the Second Artillery (i.e., strategic missile forces) and satellites that could support maritime warfare. Finall, the concluding chapter estimates the PRC's maritime warfighting capability as anticipated in respective conflict scenarios, and considers its impact on the Korean Peninsula and proposes the directions ROK should steer in response. First of all, since the 1980s the PRC navy has undergone transitions as the focus of its military strategic outlook shifted from ground warfare to maritime warfare, and within 30 years of its effort to construct naval power while greatly reducing the size of its ground forces, the PRC has succeeded in building its naval power next to the U.S.'s in the world in terms of number, with acquisition of an aircraft carrier, Chinese-version of the Aegis, submarines and so on. The PRC also enjoys great potentials to qualitatively develop its forces such as indigenous aircraft carriers, next-generation strategic submarines, next-generation destroyers and so forth, which is possible because the PRC has accumulated its independent production capabilities in the process of its 30-year-long efforts. Secondly, one could argue that ROK still has its chances of coping with the PRC in naval power since, despite its continuous efforts, many estimate that the PRC naval force is roughly ten or more years behind that of superpowers such as the U.S., on areas including radar detection capability, EW capability, C4I and data-link systems, doctrines on force employment as well as tactics, and such gap cannot be easily overcome. The most probable scenarios involving the PRC in sea areas surrounding the Korean Peninsula are: first, upon the outbreak of war in the peninsula, the PRC may pursue military intervention through sea, thereby undermining efforts of the ROK-U.S. combined operations; second, ROK-PRC or PRC-Japan conflicts over maritime jurisdiction or ownership over the Senkaku/Diaoyu islands could inflict damage to ROK territorial sovereignty or economic gains. The PRC would likely attempt to resolve the conflict employing blitzkrieg tactics before U.S. forces arrive on the scene, while at the same time delaying and denying access of the incoming U.S. forces. If this proves unattainable, the PRC could take a course of action adopting "long-term attrition warfare," thus weakening its enemy's sustainability. All in all, thiss paper makes three proposals on how the ROK should respond. First, modern warfare as well as the emergent future warfare demonstrates that the center stage of battle is no longer the domestic territory, but rather further away into the sea and space. In this respect, the ROKN should take advantage of the distinct feature of battle space on the peninsula, which is surrounded by the seas, and obtain capabilities to intercept more than 50 percent of the enemy's ballistic missiles, including those of North Korea. In tandem with this capacity, employment of a large scale of UAV/F Carrier for Kill Chain operations should enhance effectiveness. This is because conditions are more favorable to defend from sea, on matters concerning accuracy rates against enemy targets, minimized threat of friendly damage, and cost effectiveness. Second, to maintain readiness for a North Korean crisis where timely deployment of US forces is not possible, the ROKN ought to obtain capabilities to hold the enemy attack at bay while deterring PRC naval intervention. It is also argued that ROKN should strengthen its power so as to protect national interests in the seas surrounding the peninsula without support from the USN, should ROK-PRC or ROK-Japan conflict arise concerning maritime jurisprudence. Third, the ROK should fortify infrastructures for independent construction of naval power and expand its R&D efforts, and for this purpose, the ROK should make the most of the advantages stemming from the ROK-U.S. alliance inducing active support from the United States. The rationale behind this argument is that while it is strategically effective to rely on alliance or jump on the bandwagon, the ultimate goal is always to acquire an independent response capability as much as possible.

벤처기업의 R&D협력에서 사회적 자본과 기업가적 지향성이 협력성과에 미치는 영향 (The Value of Entrepreneurial Orientation and Social Capital for Enhancing Collective Performance in R&D Collaborations of Korean Ventures)

  • 서리빈
    • 기술혁신학회지
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    • 제20권1호
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    • pp.1-33
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    • 2017
  • 본 연구는 기술집약적 중소기업인 벤처기업이 외부주체와 수행하는 R&D협력에서 협력성과 강화요인을 규명하기 위해 수행되었다. 이를 위해 벤처기업의 기업가적 지향성과 협력주체 간 사회적 자본의 역할을 고찰하고, 각 요인이 협력성과에 미치는 영향을 실증적으로 분석하였다. 협력성과는 R&D협력을 통해 개발된 기술이 기업의 경쟁우위에 기여하는 정도를 의미하는 기술경쟁력과, 해당 기술을 상업적으로 활용하여 달성한 기업성과로 구분하였다. 설문조사를 통해 R&D협력을 수행한 벤처기업을 대상으로 설문조사를 하여 총 218개 표본기업의 응답데이터를 분석하였다. 그 결과, R&D협력에서 벤처기업의 기업가적 지향성과 협력주체 간 사회적 자본은 협력성과 창출에 긍정적인 영향을 미치는 것으로 나타났다. 또한 사회적 자본은 기업가적 지향성의 형성에 기여하며, 기업가적 지향성은 사회적 자본과 협력성과의 영향관계에서 완전매개의 역할을 담당하는 것으로 나타났다. 이상의 분석을 통해 [사회적 자본-기업가적 지향성-협력성과]의 R&D협력성과 창출구조가 작동한다는 사실을 확인하였다. 본 결과가 내포한 학문적 및 실무적 의의는 결론에서 상세히 기술하였다.

한국 정치극의 전개 양상 - 1920년대부터 80년대까지의 정치극운동을 중심으로 - (The Development Aspects of Korean Political Theatre Movement)

  • 김성희
    • 한국연극학
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    • 제52호
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    • pp.5-59
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    • 2014
  • This paper investigates the development and aesthetics of Korean political theatre from its quickening period 1920s to democratization era 1990s. Political theatre before 90s developed an antithesis resistant movement toward Korean modern history that had been scattered with suppressing political circumstances such as colonial era and dictatorial government, the movement has powerful activity and social influences. Just like the 20 century political theatre had been quickened under the influence of Marxism at Russia and Germany in 1920s, Korea's political theatre began in socialism theatre movement form around the same time. Proletarian theatre groups had been founded in Japan and Korea, and developed into practical movement with organized connection. However, the political theatre movement in Japanese colonial era was an empty vessel makes great sound but not much accomplishments. Most performance had been canceled or disapproved by suppression or censorship of the Japanese Empire. The political theatre in liberation era was the left drama inherited from Proletarian theatre of the colonial era. Korean Theatre alliance took lead the theatrical world unfold activities based on theatre popularization theory such as 'culture activists' taking a jump up the line and 'independent theatre' peeping into production spot as well as the important event, Independence Movement Day Memorial tournament theatre. Since 1947, US army military government in Korea strongly oppressed the left performances to stop and theatrical movement was ended due to many left theatrical people defection to North Korea. The political theatre in 1960s to 70s the Park regime, developed in dramatically different ways according to orthodox group and group out of power. The political theatre of institutional system handled judgment on sterile people and had indirect political theatre from that took history material and allegory technique because of censorship. In political theatre out of institution, it started outdoor theatre that has modernized traditional performance style and established deep relationship with labor spot and culture movement organizations. Madangguek(Outdoor theatre) is 'Attentive political theatre', satirizing and offending the political and social inconsistencies such as the dictatorial government's oppression and unbalanced distribution, alienation of general people, and foreign powers' pillage sharply as well as laughing at the Establishment with negative characters. The political theatre in 1980s is divided into two categories; political theatre of institutional system and Madangguek. Institutional Political theatre mainly performed in Korea Theatre Festival and the theatre group 'Yeonwoo-Moudae' led political theatre as private theatre company. Madangguek developed into an outdoor theatrical for indoor theatre capturing postcolonial historical view. Yeonwoo-Moudae theatre company produced representative political plays at 80s such as The chronicles of Han's, Birds fly away too, and so on by combining freewheeling play spirit of Madangguek and epic theatre. Political theatre was all the rage since the age of democratization started in 1987 and political materials has been freed from ban. However, political theatre was slowly declined as real socialism was crumbling and postmodernism is becoming the spirit of the times. After 90s, there are no more plays of ideology and propaganda that aim at politicization of theatre. As the age rapidly entered into the age of deideology, political theatre discourse also changed greatly. The concept 'the political' became influential as a new political possibility that stands up to neoliberalism system in the evasion of politics. Rather than reenact political issues, it experiments new political theatre that involves something political by deconstructing and reassigning audience's political sense with provocative forms, staging others and drawing discussion about it.

스크린야구 이용의 개선 및 증진방안 (Improvement and Promotion Plan for the Screen Baseball Utilization)

  • 구수용;전용배;최의열
    • 한국체육학회지인문사회과학편
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    • 제54권4호
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    • pp.363-372
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    • 2015
  • 본 연구는 스크린야구 이용자의 중요도 및 만족도 분석을 통해 이용의 개선점과 증진방안을 알아보기 위한 목적으로 수도권 소재 스크린야구 이용자 267명을 대상으로 설문조사를 실시하였으며, 수집된 자료는 모든 통계적 유의수준은 α=.05로 설정하고 SPSS 21.0을 이용하여 빈도분석, 구성타당도를 검증하기 위해 탐색적 요인분석, 신뢰성 검증을 위해 Cronbachs' α 계수를 산출하였다. IPA(중요도-만족도)의 차이검증을 위해서는 대응표본 t-test를 실시하여 다음과 같은 결론을 얻었다. 첫째, 스크린야구에 대한 흥미로운 점으로 생생한 현실감, 실내, 음향효과, 게임방식 등으로 나타났고, 부족한 점으로 3D의 기능 저하, 입체감, 주자와 수비수를 조정할 수 없는 것 등으로 나타났다. 둘째, 스크린야구에 대한 마케팅믹스 4Cs의 중요도-만족도 간의 차이검증을 실시한 결과, 참여자 가치, 편리성에서는 부분적으로 유의한 차가 나타났고, 비용, 커뮤니케이션의 문항 간에는 모두 통계적으로 유의한 차이가 나타났다. 셋째, 스크린야구에 대하여 중요도-만족도에 대한 인식을 IPA분석 기법을 적용하여 마케팅믹스 4Cs의 관점에서 분석한 결과, I사분면은 현상유지 부분으로 건전한 여가선용, 필요시설의 구축, 이용자와 제공자 간의 의사소통 등의 속성, II사분면은 집중노력지향 부분으로 스크린야구 프로그램의 다양화, 1회 이용 및 시간대비 비용의 적절성 등의 속성, III사분면은 열등순위 부분으로 부대시설의 구비, 식음료 비용의 적절성 등의 속성, IV사분면은 과잉노력지양 부분으로 생활만족도 향상, 스크린야구의 규칙 및 절차 등의 속성이 포함되어 있다.

IPA기법을 활용한 성 평등적 스포츠 이벤트로서 연고전의 개선방안 (A study on improvement plan of Yon-Ko-Jeon as a gender equality sports event using the IPA)

  • 배재윤;원영신
    • 한국체육학회지인문사회과학편
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    • 제55권5호
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    • pp.447-457
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    • 2016
  • 본 연구의 목적은 연고전의 여성 소외현상에 관한 여학생 인식실태를 확인하고, IPA(Importance Performance Analysis)기법을 통해 성 평등적 스포츠 이벤트로서 연고전의 개선방안을 모색하는 데 있다. 이를 위해 연세대학교와 고려대학교에 재학 중인 2, 3, 4학년 여학생 대상으로 설문조사 후 322부를 분석하였다. 이들을 대상으로 분석한 연구의 결과는 다음과 같다. 첫째, 두 대학의 대다수 여학생은 연고전에 여성 스포츠와 여성 선수가 부재한 사실을 인식하지 못하고 있었다. 이들은 연고전의 여성 소외현상에 대해 심각하게 여기지 않았으며, 개선의 필요성 또한 절실하지 않은 것으로 나타났다. 이는 일상을 잠식한 젠더스포츠의 전형적인 사례로 볼 수 있다. 둘째, IPA 분석 결과, 성 평등적 스포츠 이벤트로서 연고전의 개선방안은 구성원 공유가치 반영성을 강화하고 여성 동아리스포츠를 도입하는 것이 필요한 것으로 나타났다. 현재 연고전에는 구성원이 공유하는 가치가 제대로 반영되지 않고 있으므로 이에 대한 개선이 필요한 것이다. 또한, 연고전에 여성 동아리 스포츠 대항전을 도입해야 할 것으로 나타났다. 위 두 가지 속성은 연고전을 성 평등적 스포츠 이벤트로 개선하기 위하여 먼저 고려해야 할 사항들로 확인되었다.