• Culinary science and hospitality research
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• v.8 no.3
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• pp.57-72
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• 2002

The purpose of this study is to compare the quality of service between successful and unsuccessful traditional Korean restaurants, We utilized the 7Ps (product price, promotion, participants, physical evidence, process) theory applied in a previous study (B.H. Booms & M.J. Bitner, 1981). We analyzed the collected data in order to compare the 7P's performances between successful and unsuccessful restaurants. The results this study show that successful statistically significance that prosperous restaurants are affected by other 6Ps except promotion. The results suggest that the most Korean restaurants did not pay enough attention to promotion comparing to European and American restaurants. Thus, Korean restaurants are required to take more interest in promotion to get competitive advantages in the future.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 2002.05a
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• pp.296-303
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• 2002

Tribology, in other words, interacting surfaces in relative motion, is essential in life. The relative motion on surfaces may cause some problems with heat, vibration, noise, and so on. Unwanted vibrations by friction, which may arise during the operation of machines, are costly in terms of reduction of performance and service life. All these phenomena inolve stick-slip. The telescopic boom operations involves stick-slip oscillations like slideways. Unwanted stick-slip oscillations on telescopic boom operations cannot achieve smooth sliding and many developers of that machine makes a lot of effort to remove or reduce it. So this paper presents stick-slip oscillation with pressure of the hydraulic cylinder which drives booms, and attempts a theoretical approach for the numerical analysis for its stick-slip condition.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.16 no.2
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• pp.8-13
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• 2007

The purpose of this study is to reduced the weight of ladder boom and to improve the manufactor process by the section modification. The Conventional model consists of integral section stiffener, while the proposed model consists of truss type stiffener to reduce the weight of ladder boom and wind effector. In the two analysis models, one is based on the single boom, and the other is based in the coupling model of two booms. We present the analysis results for the case when applying the weight, bending and twisting moment and wind pressure. Finally, a comparison between these results is presented to show the performance of our method.

• Journal of the Korean Society of Marine Environment & Safety
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• v.8 no.1
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• pp.139-148
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• 2002

As the Busan harbor is getting susceptible to oil Pollution. the authors analyze the historical records of oil spill accidents and investigate the shoreline features. In addition. we evaluate the response capabilities and compute the required stockpiles of marine oil spill response with the worst case scenario in this area. As a result, it is shown that the recommendable oil spill response is to contain and mechanically recover all oils at sea surface in winter. while chemical dispersants can be used in summer with mechanical containment and recovery, and it is also found that off-shore booms of 3,000m and off-shore skimmers of 986MT/hour recovery rate should be stockpiled with 10,000∼60,000 liters of concentrate chemical dispersant and small amount of synthetic organic sorbents for possible use.

• Journal of the Korean Society for Marine Environment & Energy
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• v.3 no.3
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• pp.58-65
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• 2000

Responses to marine oil spills can be classified Into categories; 1) mechanical treatment using booms and skimmers, 2) chemical one utilizing dispersants, 3) controlled in-situ burning of spilled oils. In the present paper, characteristics, history, present issues, advantages and disadvanteges, and future applicability of in-situ burning technology which is nowadays winning much attention are summarized on the basis of a survey of related papers and other resources.

• Transactions of The Korea Fluid Power Systems Society
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• v.5 no.2
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• pp.14-19
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• 2008

Hydraulic excavator consists of booms, arms, bucket, and cylinder. The cylinder make these structures moved and the cushion parts of cylinder in operation absorb the great impact which is stemmed from high velocity and pressure at cushion parts of cylinders. The cushion technology of cylinders has a great effect on the operator's comfortable as well as protecting equipment from damage by suppressing the inertia of the hydraulic excavator. In this study, three hydraulic cylinders have different shapes of a cushion ring, respectively. we studied optimal cushion pattern by analyzing the change of cushion pressure and time, according to supply pressure and velocity variations.

• Journal of Biosystems Engineering
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• v.21 no.2
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• pp.146-154
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• 1996

농약의 직주입 혼합방식은 작업자의 안전에 기여하며 남은 농약은 용기와 함께 수거되어 재사용 되므로 환경보전 및 경제적 이점이 있다. 그러나 주입식 방제기의 분관내 농약혼합액이 노즐에 이르는 시간까지의 유동특성인 지연시간은 농약 살포량에 오차를 유발한다. 본 연구는 이 지연시간이 미치는 실제 살포오차의 정도를 파악하려 시뮬레이션을 행하였다. 시뮬레이션의 결과에 의하면 오차는 상당히 심각한 것으로 판단되었으며 지연시간을 단축하려는 여러 방법을 검토하였다. 분관의 직경을 줄여 유동속도를 빠르게 하거나, 혼입 농약의 양을 일정하게 유지하며 방제속도를 가능한 목표속도에 맞추는 방법 등은 약간의 오차를 줄일 수 있을 뿐이었고, 농약을 각 노즐에 주입함으로써 오차를 최소화할 수 있으나 미소계략의 문제를 내포하였다. 따라서 농도의 변화에 따른 지연시간을 없앤 직주입 총유량 제어방식을 통하여 노즐 배출유량을 방제속도의 변이에 따라 보상하며 비례적으로 농약을 주입하여 농도를 일정하게 유지할 수 있을 것으로 판단된다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.05a
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• pp.303-310
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• 2002

The bending vibration and thermal flutter instability of spacecraft booms modeled as circular thin-walled beams of closed cross-section and subjected to thermal radiation loading is investigated in this paper. Thermally induced vibration response characteristics of a composite thin walled beam exhibiting the circumferantially uniform system(CUS) configuration are exploited in connection with the structural flapwise bending-lagwise bending coupling resulting from directional properties of fiber reinforced composite materials and from ply stacking sequence. The numerical simulations display deflection time-history as a function of the ply-angle of fibers of the composite materials, damping factor, incident angle of solar heat flux, as well as the boundary of the thermal flutter instability domain. The adaptive control are provided by a system of piezoelectric devices whose sensing and actuating functions are combined and that an bonded or embedded into the host structure.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.36 no.3
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• pp.166-174
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• 2000

Anchovy, EngrauEis japonica scoop nets are used in the coastal of Southern and Cheju of Korea. Especially in the Cheju, the fishing gear of scoop nets consists of upper boom, lower boom, pressing stick and bag net. They are operated by fishing boats of 6 to 10 ton class and 8 persons on board. The booms are controlled by side drum, and the net and pressing stick are hauled by only human power in operating. Therefore this fishery needs to large labor and heavy human power and has much risk. Three kinds of hydraulic winding device which controls two booms was designed and manufactured to reduce heavy labor force of scoop nets, and trial in the sea was carried out to test their performances using the commercial fishing boats of 6 ton class. The proper capacity of hydraulic pump and motor were determined by model test of boom 1/5 scale. The results obtained are as follows, 1. Tension of boom which is being drawn was the strongest and 187.5kgf when the boom's end is in the depth of 4m under the water. 2. The hydraulic motor of the fittest kind of winder has the least leakage per time than the other kinds. 3. In the best type of several winder devices, when the pressure difference was fixed $130kg/^2$ for the safe fishery, the winding velocity of boom line was 2m/sec, is faster 0.48/sec than traditional fishing method and this winder can catch the anchovy of 1.6 tonnage. 4. As a result, the crew were decreased from 8 to 6 and the problem of heavy human power and risk on fishing operation were solved by using the this winder.

• The Korean Journal of Archival Studies
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• no.14
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• pp.325-357
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• 2006

In diesem Aufsatz wird die Geschichte der Bewertungsdiskussion in Deutschland vorgestellt. Bis zum 18. Jh. war das Ziel der Archivarbeit die Systematisierung der rechtlichen und politischen Kenntnissen. Der juristisch geschulte Archivar hob Unterlagen in der Regel aus $Gr{\ddot{u}}nden$ der Rechtssicherheit auf. Vernichtet wurde, was schon seit $l{\ddot{a}}ngerem$ im Archiv lag. Nach dem Zusammenfall des alten Regimes haben die Archivare keine mehr mit dem Recht des Herrschers zu tun. Und die Archive wurden zu $Lagerst{\ddot{a}}tten$ der Geschichte und Forschung. $F{\ddot{u}}r$ den Ordnung der Archivgut, die aus den verschiedener Dienststellen stammten, wurde das Provenienzprinzip gebildet. Die Archivare richtete sich auf das inhaltsorientierten Bewertungsverfahren, das die wissenschaftlichen $Bed{\ddot{u}}rfnisse$ befriedigte. Der Anlass der Bildung der modernen Archivtheorie war der ersten Weltkrieg. Das Problem, wie man die Massenakten, die $W{\ddot{a}}hrend$ dieses Krieges entstanden, behandeln sollten, $f{\ddot{u}}hrte$ unter dem $Einflu{\ss}$ der Demokratie zur Bildung der Provenienz-orientierte Bewertungsdiskussion. Aufbau, Zielsetzung und Verfahren der aktenbildenden Stelle bildeten den Ausgang der Bewertung. Im Klima ${\ddot{o}}ffentlicher$ $B{\ddot{u}}rokratieablehnung$ der 50er und 60er Jahren wurde die inhaltsorientierte Auswahl wieder die vorherrschende Methodenvorgabe. Diese Theorie, die Booms vertritt, $f{\ddot{u}}hrt$ zu der Theorie der dokumentation strategy von Ende 20. Jh.