• Title/Summary/Keyword: quantitative evaluation method

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Clinical Application of MRI in an Animal Bone Graft Model

  • Liu, Xiaochen;Jia, Wenxiao;Jin, Gele;Wang, Hong;Ma, Jingxu;Wang, Yunling;Yang, Yi;Deng, Wei
    • Journal of Magnetics
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    • v.18 no.2
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    • pp.142-149
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    • 2013
  • We aim to monitor vascularization of early bone perfusion following rabbit lumbar intertransverse bone graft fusion surgery using magnetic resonance imaging assessment. Correlation with graft survival status was evaluated by histological method. Experimental animals were randomly divided into three groups and the model was established by operating bilateral lumbar intertransverse bone graft with different types of bone graft substitute material. The lumbar intertransverse area of three groups of rabbits was scanned via MRI. In addition, histological examinations were performed at the $6^{th}$ week after surgery and the quantitative analysis of the osteogenesis in different grafted area was carried out by an image analysis system. The MRI technique can be used for early postoperative evaluation of vascularized bone graft perfusion after transplantation of different bone materials, whereas histological examination allows direct visualization of the osteogenesis process.

Development Strategies for Existing Apartment Housing Remodeling Performance Grading Indication System (공동주택 리모델링 성능등급 개발방향 설정)

  • Baek, Cheong-Hoon;Kim, Soo-Am;Yang, Hyeon-Jeong
    • Journal of the Korean housing association
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    • v.27 no.4
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    • pp.23-32
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    • 2016
  • The necessity of remodeling performance grading system is getting increased for the systematic management of existing housing stock, providing the resident's right to know and promoting the remodeling projects. A quantitative and objective evaluation method that has reflected the characteristics of remodeling must be developed because there is an aspect of having difficulty of assessment by an ordinary person as remodeling performance contains specialized details while the difficulty of applying the criteria of new buildings in terms of assessment items, criteria and methods. Accordingly, this study sets the goal as setting up the development objectives of performance grading system that has considered the remodeling characteristics. This study has analyzed the various assessment systems related to the domestic apartments as well as setting up the organization system of the remodeling performance grading system, perspectives of performance assessment and scope of assessment through literature, etc. It has also established the principles for setting up the assessment items of remodeling performance grade to present the directions for setting up assessment items and criteria.

Evacuation Efficiency on School Auditorium Floor Layout (학교강당의 평면적 특징에 따른 대피효율에 관한 연구)

  • Kwun, Joon-Bum;Kim, Duk-Soo;Kim, Khil-Chae
    • Journal of the Korean Institute of Educational Facilities
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    • v.24 no.2
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    • pp.3-10
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    • 2017
  • This study compared evacuation effectiveness between the conventional school auditorium plan and a suggested hypothetical plan that was generated by a mathematical model, which is commonly applied in the field of industrial engineering. Recent school buildings became much more complicated in floor planning due to new social needs and modern curriculum than the old days. Nevertheless, architect's approach to floor composition in terms of fire emergency evacuation planning, still has no relation to optimized effective but relies more on an conventional school planning. Therefore, since school buildings are much more likely to be exposed to any fire related events than any other building types, emergency exit effectiveness based on spatial composition has to be seriously evaluated with a scientific method. The algorithm, which acquires the number of persons in each spatial type(node) per floor and the minimum physical distance between spatial types(arc), can propose the most optimized spatial layout per floor regarding emergency evacuation event. Consequently, this study evaluated school's fire exit effectiveness focusing on auditorium area with the scientific tool and suggested the most reliable spatial layout regarding possibile emergency evacuation event.

Applicability of Vegetation Indices from Terra MODIS and COMS GOCI Imageries (Terra MODIS 위성영상과의 비교를 통한 COMS GOCI 위성영상의 식생지수 적용성 평가)

  • Park, Jin Ki;Kim, Bong Seop;Oh, Si Young;Park, Jong Hwa
    • Journal of The Korean Society of Agricultural Engineers
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    • v.55 no.6
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    • pp.47-55
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    • 2013
  • The objective of this study is to evaluate the applicability of Communication, Ocean, and Meteorological Satellite (COMS) Geostationary Ocean Color Imager (GOCI) vegetation indices on a quantitative analysis. For evaluation, the vegetation indices such as RVI, NDVI and SAVI were extracted by using COMS GOCI and Terra Moderate Resolution Imaging Spectroradiometer (MODIS) imageries. The 4,000 points using simple random sampling (SRS) method were randomly extracted from land areas except ocean to compare the vegetation indices from two images. The results of linear regression showed that the regression coefficients of RVI, NDVI, and SAVI between COMS GOCI and Terra MODIS were 0.66~0.82, 0.71~0.83, and 0.71~0.83, respectively. Especially, the regression coefficients of RVI (r=0.85), NDVI (r=0.91) and SAVI (r=0.91) were strongly related from September 2011 to January 2012. Thus, COMS GOCI can be substituted for particular periods and it needs to verify additionally.

In-vivo Evaluation of Pneumatic Ventricular Assist Device and Durability Improvement (공압식 심실보조장치의 in-vivo 평가 및 내구성 개선)

  • 이상훈;이광호;박성식;서필원;김삼현;강봉진
    • Journal of Biomedical Engineering Research
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    • v.25 no.1
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    • pp.65-70
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    • 2004
  • In this paper, we described 23 cases of animal experiment with our pneumatic ventricular assist device and new durability-improvement method. The blood pump consists of blood housing, and back plate made by the injection molding of isoplast, and the diaphragm fabricated by dipping of polyurethane solution onto the aluminum mold. Its volume was 75 $m\ell$ and in-vitro test showed that maximum output was 4.5 $\ell$/min at the 100 mmHg. The adult female sheep with weight of 50 + 10 kg were employed for tile in-vivo experiments and the mean blood flow was sustained at 3.0 1/min. 4 animals survived more than 15 days and the longest survival time was 28 days. In the prior 10 cases, the major causes of death were the tearing of diaphragm at the diaphragm to blood housing junction. By the new mesh and alumina ball milling methods, the durability was enhanced, and its qualitative and quantitative improvement was proved via the in-vivo and in-vitro methods. Animal experiments demonstrated that all the physiologic parameters a ere maintained within the permissible ranges and no thrombus formation was observed through the visual and blood test. The in-vivo experiments demonstrated our pneumatic ventricular assist device to he one month's bridge to transplantation device.

The Study on the Actual Condition of Customer's Consumption and the Analysis of Market on Food Service Industry Category (외식산업의 유형에 따른 시장분석과 소비 기호성의 탐색적 연구 -스페셜러티(Speciality Coffee) 커피산업을 중심으로-)

  • Gang, Seok-U
    • Journal of Applied Tourism Food and Beverage Management and Research
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    • v.15 no.2
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    • pp.1-22
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    • 2004
  • This study was intended to analysis about quantity and quality aspects of speciality coffee industry in korea. All date was analysed by statistics package program spss 10.0. All market of coffee In korea, the market share of speciailty coffee have been maintained about 10 percent since it was analysed statically about coffee market in korea. The rest market is soluble coffee market. But by comparison with developed country case, korea's coffee market is being unbalanced between soluble coffee and speciality coffee market. This study was analyze actual consumer's consulnption styles of the speciality coffee as well as its industry. According to the qualitative analysis results from peter's model was analysed that made a high growth potentiality and profitability in the future. According to the quantitative analysis results, sampling unit's 87.6 percent made a recognize about the speciality coffee. Sensory evaluation results was researched that factors impacted on the overall speciality coffee quality was shown a significant diffrrence on the two dimension such as the body factor, acidity factor. This study has limit which can not represent overall recognition because of analysis based on limited data. It is thought that steady study should be continued hereafter through more systematic and reliable study method.

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The Effects of Quantitative Occlusal Force on Size of Temporomandibular Joint Space (정량적 교합력이 측두하악관절강 크기에 미치는 영향)

  • Woo-Cheon Kee
    • Journal of Oral Medicine and Pain
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    • v.18 no.1
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    • pp.21-29
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    • 1993
  • The purpose of this study was to evaluation of temporomandibulr joint space according to increasing the occlusal force on working and non-working side during unilateral bite. For the study, 22 normal adults, age ranged from 23 to 25, who had no symptoms on TMJ area and masticatory muscles and had normal or class I molar relationship were selected. Transcranial TMJ radiograph was taken during unilateral biting with sensor of Bite force checker (Nihon Kohden Kygyo Co.Ltd., Japan) on each 1st molar teeth of right and left side which were forced each 0Kg, 10Kg, 20Kg and 30Kg by use of Accurad-200 (Denar Corperation's product). The radiographs were traced on the screen, which was magnified by 5. The size of temporomandibular joint space at anterior, superior and posterior compartment were measured with Dumas's method (reference line of between squamotympanic fissure and the most inferior point of articular eminence). On the basis of this study, the following results were obtained. 1. Size of anterior TMJ space was tend to decrease on the working side and increase on the non-working side according to increasing the occlusal force, but not significant statistically (p>0.05). 2. Size of superior TMJ space was tend to increase on the working side and decrease on the non-working side according to increasing the occlusal force (p<0.05). 3. Size of posterior TMJ space was tend to decrease on both working ad nonworking side, but non significant statistically.

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A Study on Quantitative Evaluation of Outdoor Recreation Functions and Values on Urban Forest (都市林의 屋外레크레이션 機能과 價値의 計量的 評價에 關한 硏究 -都市林의 利用滿足度를 中心으로-)

  • Park, Chan-Yong
    • Journal of the Korean Institute of Landscape Architecture
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    • v.18 no.3 s.39
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    • pp.143-154
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    • 1990
  • This study aims at identifying factors and variables which have significant effects on users satisfaction with recreational activities and facilities in Apsan city natural park and therby establishing indicies of planning and / or development of urban forest. To test the causal models of this research, The data were gathered by self-administered questionnaires from 1,147 households in Taegu city which were selected by the multi-stage probabiling sampling method. The analysis of the data primarily consist of two phases : The first analysis dealt with exploratory factor analysis which identified major factors involved in satisfaction with recreational activities and facilities in Apasn city natural park and the second analysis tested the fit of causal models of this research to the data using LISREL methodology. The factor analysis identified that three significant factors are involved in satisfaction with recreational activities and five significant factors are inherent in satisfaction with recreational facilities. The second phase analysis tested the fit of the causal models for satisfaction with recreational activities and facilities to the data and identified statistically significant causal linkage among overall satisfaction with the park, other indogenous factors and exogenous variables. These significant relationships represent important factors and variables that should be considered in planning and/of development of the city natural park. On the basis of there significant causal relationships implications for planning and/or development of the city natural park were suggested.

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The Best Line Choice for Transmission System Expansion Planning on the Side of the Highest Reliability Level

  • Sungrok Kang;Trungtinh Tran;Park, Jaeseok;Junmin Cha;Park, Daeseok;Roy Billinton
    • KIEE International Transactions on Power Engineering
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    • v.4A no.2
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    • pp.84-90
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    • 2004
  • This paper presents a new method for choosing the best line for transmission system expansion planning considering the highest reliability level of the transmission system. Conventional methodologies for transmission system expansion planning have been mainly focused on economics, which is the minimization of construction costs. However, quantitative evaluation of transmission system reliability is important because successful operation and planning of an electric power system under the deregulated electricity market depends on transmission system reliability management. Therefore, it is expected that the development of methodology for choosing the best lines considering the highest transmission system reliability level while taking into account uncertainties of transmission system equipment is useful for the future. The characteristics and effectiveness of the proposed methodology are illustrated by the case study using a MRBTS.

Effective Evacuation based on Elementary School's Floor Layout (초등학교 층별 구성과 비상시 대피효율성의 관계)

  • Kwun, Joon-Bum;Kim, Duk-Su;Kim, Khil-Chae
    • Journal of the Korean Institute of Educational Facilities
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    • v.23 no.3
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    • pp.3-10
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    • 2016
  • This study compared evacuation effectiveness between the conventional school floor plan and a suggested hypothetical floor plan that was generated by a mathematical model that is commonly applied in the field of industrial engineering. Recent school buildings became much more complicated in floor planning due to the new educational system and modern curriculum than the old days. Nevertheless, architect's approach to floor composition in terms of fire emergency evacuation planning, still has no relation to optimized effective but relies more on a conventional school planning. Therefore, since elementary school buildings are much more likely to be exposed to any fire related events than middle school or high-school, emergency exit effectiveness based on spatial composition has to be seriously evaluated with a scientific method. The algorithm, which acquires the number of persons in each spatial type (node) per floor and the minimum physical distance between spatial types (arc), can propose the most optimized spatial compositing per floor regarding emergency evacuation event. Consequently, this study evaluated elementary school's fire exit effectiveness with the scientific tool and suggested the most reliable spatial composition per floor regarding possibile emergency evacuation event.