• 대한교통학회지
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• 제24권3호
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• pp.177-187
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• 2006

IT 산업이 발달하고, 정보의 양이 넘쳐날수록, 사람들은 획일화되어 제공되는 정보보다는, 스스로 다양한 경로를 통해 정보를 찾아내며, 이를 가공하여 판단하고 반응한다. 그러므로 정보 제공자들은 이러한 개인들의 성향을 만족시키기 위해 서는 획일화된 정보보다는 소비자들이 스스로 판단할 수 있도록 다양한 정보를 제공해 주어야만 할 것이다 이를 위하여 비용의 비교를 통해 경로를 선택하는 기존 알고리즘과 달리 최저비용과의 차이를 통한 알고리즘을 제안한다. 이를 위해 본 연구는 기존의 노드 기반 탐색법에 비해 네트워크 구조의 변화 없이 효율적으로 환승이나 회전제약을 표현할 수 있는 링크 기반 탐색법을 기반으로 운전자들의 다양한 needs를 최대한 반영할 수 있는 즉 유연한 탐색 알고리즘의 개발을 목표로 한다. 이러한 목표를 위해, 기존의 최적 경로와 다경로 탐색 알고리즘을 대상으로 이론적 배경을 고찰하고, 다목적 정보제공을 위한 다경로 탐색기법을 위한 통행원리를 개념화한 후, 이를 알고리즘에 적용하는 방안을 제안하며, 가상의 네트워크에 적용하여 알고리즘 수행과정을 보여주고자 한다

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.621-631
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• 1996

It is said that robot can be used for multi-purpose use by changing end effector or/and visual sensor with its software. In this study, it was investigated what multi-purpose robot for fruit-production was using a tomato harvesting robot and a robot to work in vineyard. Tomato harvesting robot consisted of manipulator, end-effector, visual sensor and traveling device. Plant training system of larger size tomato is similar with that of cherry-tomato. Two end-effectors were prepared for larger size tomato and cherry-tomato fruit harvesting operations, while the res components were not changed for the different work objects. A color TV camera could be used for the both work objects, however fruit detecting algorithm and extracted features from image should be changed. As for the grape-robot , several end-effector for harvesting , berry thinning , bagging and spraying were developed and experimented after attaching each end-effector to manipulator end. The manipulator was a polar coordinate type and had five degrees of freedom so that it could have enough working space for the operations. It was observed that visual sensor was necessary for harvesting, bagging and berry-thinning operations and that spraying operation requires another sensor for keeping certain distance between trellis and end-effector. From the experimental results, it was considered that multi-operations by the same robot could be appropriately done on the same or similar plant training system changing some robot components . One of the important results on having function of multi-operation was to be able to make working period of the robot longer.

• 한국의류학회지
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• 제33권4호
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• pp.644-654
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• 2009

The purpose of this study is to analyze the characteristics of current fashion illustrations within the framework of Multi-space method. Multi-space means being piled up one moment & space on others, and being amassed in a scene. This method is related with Dadaism, Surrealism and Postmodernism, and also influences on the current fashion illustration. In this study, the types of Multi-space method could be classified into 4 types; Repetitive Time Mixture in Multi-space, Juxtaposed Time Mixture in Multi-space, Reiterated Space Mixture in Multi-space, Projected Space Mixture in Multi-space. The characteristics of Multi-space were analyzed and the results are as followed. The distinctive methods for Time Mixture in Multi-space are repetition and juxtaposition in a scene. Time Mixture in Multi-space can make the nonlinear narration and unreal illusory space in fashion illustrations more effectively. Reiterated Space Mixture in Multi-space can be related with the heterogeneous, surrealistic illusions in current fashion illustrations. Projected Space Mixture in Multi-space can be characterized into inter-penetration. It can derive spectators to mix the projected & transparent images in a scene for their own imaginary stories. The final imagination can be made differently according to the personal experiences of spectators.

• 보건행정학회지
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• 제22권1호
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• pp.109-128
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• 2012

The purpose of this study is to analyze the performance difference between multi-hospitals and free-standing hospitals. Scholars in industrial economics argue that, due to economies of scale and integration, multi-hospital system may have a better performance compared to freestanding hospitals. The study overturned the hypothesis based on a theory. By analyzing 425 acute-care hospitals in Korea, this research shows that multi-hospital systems and market factors, which have been perceived to be strengths to hospitals, are negatively related to hospitals' financial performance. Specifically, the results showed a better performance of freestanding hospitals compared to multi-hospital systems. Higher labor and administrative cost by multi-hospital system may be the reason for the difference, and it means they are not more effective at cost control. Managers in multi-hospital system, therefore, should pay attention on cost-reducing issues to regain managerial efficiency of organizations.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2007년도 추계학술대회 논문집
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• pp.242-245
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• 2007

In the present investigation, the multi-stage warm drawing process was applied to the magnesium alloy AZ31 sheet to examine the feasibility of multi-stage forming process as a high formability product making process. For that purpose, a multi-stage drawing die system with heating module was developed, and the AZ31 sheets of different sizes were consecutively drawn by the multi-stage drawing die. The obtained drawn cups of AZ31 showed that the multi-stage drawing provided the better formability than the single stage drawing in terms of drawing depth without cup defects such as wrinkles or fractures. The sheet formability improvement by using the multi-stage drawing die system against the single stage was also analyzed in terms of the finite element analysis of material state variables evolution.

• 한국산학기술학회논문지
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• 제15권3호
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• pp.1355-1366
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• 2014

이 연구의 목적은 초등학생들의 부모양육행동과 심리적 안녕감이 다문화 수용성에 영향을 미치는 요인은 무엇인지를 알아보고자 하였다. 이러한 연구목적을 달성하기 위하여 I시에 소재한 초등학생 328명을 대상으로 질문지를 사용하여 설문조사를 실시하였다. 설문조사 결과 첫째, 초등학생들의 부모양육행동, 심리적 안녕감, 다문화 수용성은 배경변인별로 차이가 나타나지 않았다. 둘째, 초등학생들의 부모양육행동, 심리적 안녕감, 다문화수용성에서 유의미한 상관관계가 있는 것으로 나타났다. 셋째, 초등학생들의 부모양육행동과 심리적 안녕감이 다문화 수용성에 긍정적인 영향을 미치는 것으로 나타났다. 이러한 연구 결과로 볼 때, 일반가정에서 다문화에 대한 수용이 효과적으로 이루어지기 위해서는 부모들의 양육행동과 심리적 안녕감에 대한 인식과 태도가 변화되어야 하며, 다문화사회의 구성원으로서 일반 가정 학생과 다문화가정 학생 모두 더불어 살아가는데 긍정적인 영향을 줄 수 있을 것으로 보인다.

• 구강회복응용과학지
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• 제27권1호
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• pp.81-90
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• 2011

resin infiltrant의 초기 우식 병소에 침투를 SEM과 CLSM을 사용하여 관찰하고, resin infiltrant와 3가지 접착제(All-bond 2, Scotchbond Multi-purpose, Clearfil SE bond)의 pH와 점도를 평가하고, 영구치에 resin infiltrant 적용 후 표면 조도와 미세경도의 변화를 측정하였다. 점도(Pa.s)는 resin infiltrant($0.173{\pm}0.012$), All-bond 2($0.754{\pm}0.030$), Scotchbond Multi-purpose($1.46{\pm}0.137$), Clearfil SE bond($1.28{\pm}0.125$)로 측정되었다. pH는 resin infiltrant (4.7), All-bond 2(7.5), Scotchbond Multi-purpose(8.2), Clearfil SE bond(4.67)로 측정되었다. resin infiltrant의 적용은 적용하지 않은 시편과 비교할 때 표면 조도와 미세경도에 유의한 차이를 보이지 않았다.(p>0.05).

• 한국농공학회논문집
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• 제58권4호
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• pp.21-35
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• 2016

This study is to evaluate the applicability of SWAT (Soil and Water Assessment Tool) model for multi-purpose dams and multi-function weirs operation in Namhan river basin ($12,577km^2$) of South Korea. The SWAT was calibrated (2005 ~ 2009) and validated (2010 ~ 2014) considering of 4 multi-purpose dams and 3 multi-function weirs using daily observed dam inflow and storage, evapotranspiration, soil moisture, and groundwater level data. Firstly, the dam inflow was calibrated by the five steps; (step 1) the physical rate between total runoff and evapotranspiration was controlled by ESCO, (step 2) the peak runoff was calibrated by CN, OV_N, and CH_N, (step 3) the baseflow was calibrated by GW_DELAY, (step 4) the recession curve of baseflow was calibrated by ALPHA_BF, (step 5) the flux between lateral flow and return flow was controlled by SOL_AWC and SOL_K, and (step 6) the flux between reevaporation and return flow was controlled by REVAPMN and GW_REVAP. Secondly, for the storage water level calibration, the SWAT emergency and principle spillway were applied for water level from design flood level to restricted water level for dam and from maximum to management water level for weir respectively. Finally, the parameters for evapotranspiration (ESCO), soil water (SOL_AWC) and groundwater level fluctuation (GWQMN, ALPHA_BF) were repeatedly adjusted by trial error method. For the dam inflow, the determination coefficient $R^2$ was above 0.80. The average Nash-Sutcliffe efficiency (NSE) was from 0.59 to 0.88 and the RMSE was from 3.3 mm/day to 8.6 mm/day respectively. For the water balance performance, the PBIAS was between 9.4 and 21.4 %. For the dam storage volume, the $R^2$ was above 0.63 and the PBIAS was between 6.3 and 13.5 % respectively. The average $R^2$ for evapotranspiration and soil moisture at CM (Cheongmicheon) site was 0.72 and 0.78, and the average $R^2$ for groundwater level was 0.59 and 0.60 at 2 YP (Yangpyeong) sites.

• 대한방사성의약품학회지
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• 제5권2호
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• pp.71-78
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• 2019

Nuclear imaging is one of the most powerful measures for non-invasive diagnosis of myocardial vascular disease. Radionuclide such as ¹³N, ¹⁵O, ²⁰¹Tl and ⁸²Rb is used for the measurement of cardiac blood flow. ¹³N, ¹⁵O and ²⁰¹Tl are produced in cyclotrons while ⁸²Rb is obtained from generator. Rubidium (Rb), an alkali ion, behaves biologically like potassium, and accumulates in myocardial tissue. Rb has rapid blood clearance profile which allows the use of ⁸²Rb with a short physical half-life of 75 s for non-invasive evaluation of regional myocardial perfusion. There are several advantages of ⁸²Rb over other radioisotopes. An ultra-short half-life significantly reduces the exposure of patients to radiation and allows to repeat injections for studying the effects of medical intervention. As a positron emitter, ⁸²Rb allows positron emission tomography (PET) imaging which have shown superior diagnostic performances. ⁸²Rb can be produced from generator by decay of its parent ⁸²Sr. However, the preparation of ⁸²Sr is difficult, because appropriate purity is required to meet the specification of the product. Recently reported procedure from ARRONAX research institute showed that a Chelex-100 resin is sufficient for this purpose and additional column is not necessary. Whereas Brookhaven National Laboratory (BNL) procedure contains three ion exchange resin separation, including Chelex-100 resin. Currently, since ⁸²Sr production site is non-existent in Korea, Korea Atomic Energy Research Institute (KAERI) has plan to produce ⁸²Sr within specifications. We compared ⁸²Sr purification procedures reported from ARRONAX and BNL to investigate the most suitable procedure for our conditions.

• 한국정보처리학회논문지
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• 제3권6호
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• pp.1493-1505
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• 1996

인터네트의 사용의 급격한 증가와 멀티미디어 정보의 보편화에 따라 이를 이용하 는 다양한 전자우편 프로토콜들이 나타나고 있다. 이러한 전자우편의 상용화와 전자 우편을 통한 개인정보 및 주요정보 보호를 위해서는 암호화 기법을 이용한 보안기능 이 필수적이다. 논 논문은 멀티미디어를 지원하는 인터네트 전자우편(MIME;Multi -Purpose Internet Mail Extension)에 보안 기능을 추가한 MOSS(MIME Object Security Service)의 효과적 처리에 필요한 라이브러리 함수개발에 관하여 기술하였 다. 이를 위하여 MINE구조로 나타나는 암호화와 복호화, 전자결재 및 검증등의 보안 기능 처리를 위한 MOSS의 특성 및 구조에 관하여 기술하고 이를 실질적으로 개발하기 위한 자료구조 및 필요한 함수들을 정의하였으며 개발시 고려하여야 할 사항들에 대 하여 기술하였다.