• 한국언론정보학보
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• 제24권
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• pp.93-117
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• 2004

이 연구는 방송사의 조직문화와 가치지향성이라는 관점에서 한국 방송의 공공성 제고 문제를 검토하였다. 방송은 그것을 만드는 사람의 정신과 무관하지 않고 프로그램 제작자는 자신이 속한 방송사가 지향하는 가치를 벗어나기 어렵다는 연구결과를 바탕으로 설문조사와 면접조사를 통해 한국방송공사 프로듀서들의 문화적 특성과 가치지향성을 살펴보았다. 그 결과, KBS 프로듀서들은 부서에 따라 친밀성과 연대성의 정도가 달랐고, 담당하고 있는 프로그램 장르와 방송 채널에 따라 프로그램의 기획과 제작에서 중요하게 고려하는 가치가 달랐다. KBS는 공공성 확보를 표명해왔지만 실질적인 운영의 원칙으로 삼지 않아 왔고 구성원들의 주요한 가치로 내면화되지 못하면서 공익성과 시청률이라는 두 개의 가치지향성을 갖게 되었다. 이 연구는 우리 공영방송의 공공성 확보가 법과 제도의 차원에서 뿐만 아니라 조직문화와 가치지향성의 측면에서도 접근해야 해결될 수 있다고 제안한다.

• 화훼연구
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• 제16권3호
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• pp.179-185
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• 2008

화환 재료로서 참다래나무 전정가지의 이용 가능성을 조사하여 화환 재료의 다양화에 기여하고자 본 연구를 실시하였다. 참다래나무(Actinidia deliciosa cv. 'Hayward') 11-15년생 1그루당 전정가지 발생량은 직경 76cm의 화환 I개를 만들 수 있는 분량이었다. 참다래나무 전정가지를 이용해 직경 76cm 화환을 만들 때 31~40cm 길이의 가지 75개가 필요하였다. 직경 76cm인 화환 1개를 만드는데 소요되는 절지비용은 느티나무와 삼지닥나무는 약 6,000원, 화살나무와 말채나무는 약 10,000원이었다. 화훼장식가들은 화환 재료로서 참다래 절지의 광택, 섬세함, 독특한 형태, 색상의 다양함은 기존 상용 절지에 비해 낮게 평가하였으나 곡선의 아름다움, 건조 후의 변화, 이용성 빛 장래성은 좋다고 평가하였다. 따라서 참다래나무 전정가지를 화환 재료로 이용하면 농가의 소득 증가와 화환 재료의 다양화에 기여할 것으로 생각된다.

• 대한교통학회지
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• 제28권6호
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• pp.65-74
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• 2010

이 연구는 다양한 차종의 차량이 혼합되어 운영되는 소형 3지 회전교차로에서 용량과 지체를 산정할 때 고려될 수 있는 새로운 형태의 승용차 환산계수의 모형과 이를 이용한 보정계수의 개발에 관한 것이다. 연구를 위하여 현재 회전교차로의 효과척도로 사용되고 있는 제어지체(Control Delay)를 기반으로 한 산정모형을 개발하고 현장에서 직접 수집한 실험자료를 적용하여 결과를 도출하고, 이를 이용재 외(2001)에서 제의한 모형의 결과와 비교 분석한다. 신호 교차로와는 달리, 회전교차로에서는 아직 중차량에 대한 영향을 객관적으로 감안할 수 있는 승용차 환산계수의 모형이 아직 제시되고 있지 않다. 두 가지 접근법에 의한 분석의 결과는 상호 높은 상관성을 보이고 있으며, 외국의 다른 연구결과와도 유사한 결과를 보이고 있어 향후 이 분야의 연구에 도움을 줄 것으로 판단된다.

• 농촌계획
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• 제18권4호
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• pp.171-180
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• 2012

This study promotes the improvement of local incomes and rural activation by establishing rural experience theme park plans using local resources of Samzi district, Yeongyang-gun. The spatial scope of the study is the whole district of Samzi 1-ri, Yeongyang-eup, Yeongyang-gun, Gyeongsangbuk-do, the destination area is $129.927m^2$. The scope of the contents was to investigate general status of the site and was conducted as a basic plan, a basic planning stage through analysis of terrain and topography, slope analysis, aspect, SWOT analysis. The satisfaction of the customers to experience is increased, activation of rural exchange and income-generating infrastructure can be expected by creations the space of rural experience theme park. Themes are selected systematically and variety of the programs and spatial planning will be analyzed to promote more efficient business.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2000년도 제20회 KOSCO SYMPOSIUM 논문집
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• pp.9-15
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• 2000

Characteristics of lifted flames for highly diluted propane and methane with nitrogen in coflowing air is experimentally investigated. In case of propane, for various fuel mole fractions and jet velocities, three distinctive types of flames are observed; nozzle attached flames, stationary lifted flames, and oscillating lifted flames. When fuel jet velocity is much smaller than coflow velocity, the base of nozzle attached flame has a tribrachial structure unlike usual coflow difusion flames. Based on the balance mechanism of the propagation speed of tribrachial flame with flow velocity, jet velocity is scaled with stoichiometric laminar burning velocity. Results show that there exists two distinctive lifted flame stabilization; stabilization in the developing region and in the developed region of jets depending on initial fuel mole fraction. It has been found that lifted flame can be stabilized for fuel velocity even smaller than stoichiometric laminar burning velocity. This can be attributed to the buoyancy effect and flow visualization supports it. Lifted flames are also observed for methane diluted with nitrogen. The lifted flames only exist in the developing region of jet.

• 대한기계학회논문집B
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• 제28권5호
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• pp.569-579
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• 2004

The lift-off characteristics of lifted laminar propane jet flames highly diluted with nitrogen are investigated introducing acoustic forcing with a fuel tube resonance frequency. A flame stability curve is obtained according to forcing strength and the nozzle exit velocity for N2 diluted flames. Flame lift-off behavior is globally classified into three regimes; 1) a weakly varying partially premixed behavior caused by a collapsible mixing for large forcing strength, 2) a coexistent behavior of the edge flame and a weakly varying partially premixed behavior for moderate forcing strength, and 3) edge flame or triple flame behavior for small forcing. It is shown that the laminar lifted flame with forcing affects flame lift-off behavior considerably, and is also clarified that the flame characteristic of flame base is well described with the penetration depth of the degree of mixing, ${\gamma}$$\_$$\delta$/. It is also confirmed that the weakly varying partially premixed flame caused by a collapsible mixing fur large forcing strength behaves as that just near flame blow-out in turbulent lift-off flame.

• 대한기계학회논문집B
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• 제24권12호
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• pp.1662-1669
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• 2000

Various flame types are observed in a double concentric burner by varying equivalence ratio and flow rates in each tube. Observed flame types include bunsen-type flame, ring-shaped flame, outer lifted flame, inner lifted flame, and oscillatory lifted flame, The doman of existence of various flames is mapped with equivalence ratio and annular jet velocity. Each flame is investigated through direct photography and OH PLIF. As central air velocity increase, the blowout region is diminished and lifted oscillating flames are observed. Inner lifted flames are observed from bunsen flames or rich shaped flames by increasing central air velocity. For inner lifted flames, annular jet velocity, at flame liftoff decreases with increasing central air jet velocity. Axial velocity profile and temperature fie이 using LDV and CRS, respectively, for a typical inner lifted flame are also measured through which the role of tribrachial flame for stabilization in emphasized.

• 디지털산업정보학회논문지
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• 제18권1호
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• pp.11-24
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• 2022

Open Radio Access Network (O-RAN) standard has been proposed to separate the baseband signal processing unit from the Radio Frequency (RF) unit at base station system mainly for reducing the cost of base station systems through open-source interfaces between the two units. To satisfy the performance metrics in various scenarios, several fronthaul functional split options were presented by O-RAN. Amongst these options, the split option 7-2x is widely adopted in practical applications due to its excellent trade-off between the required bandwidth and RU overhead. In this paper, we present a hardware implementation of a base station system that is compliant with the Category B of O-RAN split option 7-2x. It consists of O-DU and O-RU implemented with a commercial off-the-shelf Digital Signal Processor and RF transceiver, respectively. The performance of the proposed base station system is evaluated in terms of Bit Error Rate and received signal power as well as the required fronthaul bandwidth. Through various experimental tests, we have observed that the proposed system reduces the fronthaul bandwidth nearly by 89.7% compared to the conventional system that dose not employ the O-RAN standard.

• 대한기계학회논문집B
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• 제34권4호
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• pp.399-408
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• 2010

질소 희석된 프로판 층류 부상 화염에서 화염진동 불안정성과 화염 곡률 효과를 살펴보기 위하여 실험적 연구를 수행하였다. 화염 진동은 총 3가지 영역으로 열손실에 의한 진동, 열손실 및 부력이 혼재된 진동, 그리고 열손실 및 루이스 수에 의한 영향이 혼재된 진동으로 구분되었다. 순수 열손실에 의한 진동은 루이스 수에 의한 진동과 부력에 의한 수력학적 불안정성과 관련이 없으며 연료 루이스 수에 관계없이 모든 부상화염 조건에서 관찰되었다. 화염의 시간에 따른 부상높이 변화에 대한 FFT분석을 통해 화염진동 불안정성의 실험적 증거와 특성을 명확히 제시하였고, 부상 화염의 열손실에 의한 자기진동의 메커니즘에 대한 시나리오를 논의한다.

• 한국조경학회지
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• 제28권2호
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• pp.108-121
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• 2000

This study seeks what kind of factors influence to locate dwellings and to establish scenic spots in nature by a case study focused on a meandering stream. The study specially concentrates on the interrelationship between both residences and beautiful sceneries and a meander cut-off-area that reveals a special topographical characteristics, located at Samji village in Youngyang-eup, Youngyang-gun, Koungsangbuk-do. The meander cut-off area, developed at the middle or upper reaches of a river, often makes up specific landscapes such as precipitous cliffs, sheer cliffs and caves. And the area where is specially created by sudden change of flow due to erosion ;perceived by the cut surface to be the most beautiful scenic spot. These beautiful landscapes were used to be called as Dae, Dam or Gul and managed by Confucian scholars who enjoy refined taste and devote themselves to the study in nature. Moreover, the Ku-Hado-literary means the area of ex-flow-made the scholars' lving with a well prepared basis for agriculture where supplied a cornucopia of organic matters and water. The merit of agriculture made it possible that the scholars became economically independent, and the fact might be the essential point why the meander cut-off area took noticed. Actually, Cho-family has been in Smaji Village for generations, producing a large number of scholars and keeping the actual power of the region. The physical shape of the meander cut-off area, cozily surrounded by mountains, is considered as a good place for the dwelling due to the influence of traditional sight of view for location and P'ungsuchiri which is known as Feng Shui in China and geomancy in the western world. It is a fruit in it own way that we could find the ancestors' discernment and wisdom from this study, who have lived their lives adapting themselves to the given natural environment and also utilizing the nature wisely. But this is a current-argued study on the meander cut-off area. Follow-up studies have to be continued about the landscapes of the meander streams and the meander cut-off areas scattered all over the country except Samji Village and draw the characteristics from the comparative analysis.