• Title/Summary/Keyword: 등급화 분석

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Indices for Quality Evaluation by Physicochemical and Chemoenzymatic Method in Red seabream, Pagrus major (물리 및 효소화학적 방법에 의한 참돔, Pagrus major의 품질판정 지표 설정)

  • 심길보;배진한;정호진;여해경;김태진;조영제
    • Journal of Aquaculture
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    • v.17 no.3
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    • pp.228-232
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    • 2004
  • This study evaluates red seabream quality using physicochemical and chemoenzymatic indices. Breaking strength was correlated with moisture content and lipid content of red seabram by a precedent experiment. Moisture content (X11), lipid content (X22) and breaking strength (Y) were optimized with multiple regression as, Y= -2.53539+0.05544X11-0.00161X22. To test the equation, red seabream (n=13) were randomly purchased and measured moisture content, lipid content and breaking strength. The calculated breaking strength using the equation was similar to breaking strength measured using Rheo meter. Adenylate energy charge (AEC), a general biochemical index of stress, values of all sample were higher than 0.8 expect two fish. Fish's condition was a good. The equation developed in this study predicts breaking strength with moisture and lipid content measured. Moreover the equation may be used in grading cultured red seabream with calculated breaking strength. Grade according to breaking strength, when it came to over 1.4 kg, was measured as high grade; when it came to below 1.2 kg, was measured as low grade. Grade according to AEC, when it came to over 0.8, was measured as high grade.

Correlation between Medial Joint Space on Rosenberg View and Ultrasonographic Medial Meniscal Extrusion (Rosenberg view상의 관절 간격과 초음파적 내측 반월상 연골 탈출의 상관 관계)

  • Kim, Jung-Man;Kim, Tae-Hyung;Im, Dong-Sun;Shin, Eun-Su;Moon, Young-Suk
    • The Journal of Korean Orthopaedic Ultrasound Society
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    • v.3 no.2
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    • pp.59-64
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    • 2010
  • Purpose: The purpose of this study was to analyze the correlation between medial joint space on Rosenberg view and the degree of ultrasonographic medial meniscal extrusion. Materials and Methods: Three hundred ninety knees with medial joint tenderness examined by ultrasonography were reviewed between January 2009 and May 2010. Medial joint space was divided into Grade I ( 4 mm), Grade II (3~4 mm), Grade III (2~3 mm), Grade IV (1~2 mm) and Grade V (0~1 mm). Then sonographaphic mid-medial extrusion of the medial meniscus was measured in each patient. After dividing into Group A that didn't have large osteophytes ( 3 mm, medial joint at tibia) and Group B that had them, the correlation between the medial joint space and medial meniscal extrusion were analyzed in each group. One-way ANOVA & Scheffe test on the SAS program were used for the statistical analysis (p<0.05). Results: There was a positive correlation between grade of the joint space and medial meniscal extrusion in Group A, but there was no positive correlation in Group B (p<0.05). Conclusion: To the patients who didn't have advanced osteoarthritis, the narrowing of the medial joint space was one of the predictive factors for mid-medial extrusion of the medial meniscus.

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A study on the meaning of game policy through the amendment of game law (게임 법률의 제·개정을 통해 본 게임정책이 지향하는 의미 탐구)

  • Kim, Min Kyu
    • Review of Culture and Economy
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    • v.21 no.2
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    • pp.53-88
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    • 2018
  • Among the cultural industries, the game industry is the most economically valuable industry. It has been about twenty years since the game policy has been implemented and the game laws have been enacted. If the law is a willing expression for the realization of the policy, the orientation of the game policy can be grasped through revision of the game laws. SOUND RECORDS, VIDEO PRODUCTS, AND GAME SOFTWARE ACT, established in 1999, and GAME INDUSTRY PROMOTION ACT, which was enacted in 2006, are regulated by many revisions. In this paper, I try to understand the direction and meaning of Korean game policy(classification, game dysfunction, gambling, industry growth) through the contents of the revision of the game law for 20 years. The game policy shown through the amendment of the game law is intended to protect the game by regulating the game, and to protect the game user by preventing the gambling and preventing the game dysfunction, and to increase autonomy of users and choice of producers by switching to self rating system, and based on this, an environment for continuous industrial growth is created. In the future, game policies should consider cooperation with social areas beyond game-specific areas. On the other hand, it needs to respond to new agendas such as polarization of industrial structure, fair environment, employment environment.

Procedure of the Ecological Index and Rating Calculation Methods for Fishery Environmental Assessment (어장환경평가의 평가지수 및 등급 산정 방법 소개)

  • Park, Sohyun;Kim, Sunyoung;Kim, Youn Jung;Hong, Sok-Jin;Jung, Rae Hong;Yoon, Sang-Pil
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.5
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    • pp.835-842
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    • 2022
  • Several countries are establishing management systems for aquaculture environment, and fishery environment assessment is one of them. The fishery management law amended in 2013 stipulates that a fishery environment assessment should be performed when a fish cage farm's license is extended. The purpose of the fishery environment assessment is to promote sustainable fishery, increase the fishery production capacity, and increase the fishermen incoming by implementing evaluation and improvement measures through scientific methods. The analysis items of fishery environment assessment include the Benthic Health Index (BHI), which is a biological index based on the macrobenthic polychaetes community, and total organic carbon (TOC), and the two items are scored and used for evaluation as a single grade. This study explains the selection process of BHI and TOC, which are evaluation items for fishing ground, and ecological significance of the calculated evaluation grades.

The Analysis of Brain Tumor's Grades Using Magnetic Resonance Spectroscopy (대뇌 종양에서 자기공명 분광법 적용 결과의 분석 연구)

  • Yun, Sang-Jun;Lim, Jong-Soo
    • Journal of radiological science and technology
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    • v.31 no.4
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    • pp.355-365
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    • 2008
  • Purpose : This study isto determine the grade of brain tumor and compare the characteristics in each grade using in MRS (MR Spectroscopy). Method : STEAM (Stimulated Echo Acquisition Method) and protocol of PRESS (Point Resolved Spectroscopy) were used in the levels of tumor grade. We classified the pattern of tumor and analysis of the spectrum signals quantitatively from voxel in the brain tumor grade. In accordance with the result, we calculated the accuracy of biochemical. Result : In high-grade tumor, the NAA/Cr showed the signal reduction of 29.4% and 53.9%. However Cho/Cr increased 570% and 711%. However, in low-grade tumor, NAA/Cr downed to 42.6% and 58.1%. Cho/Cr increased to 188% and 195%. Conclusion : The study suggests that the comparative analysis of signals from MR spectroscopy could be useful to evaluate the grade of tumor and find out the characteristics of it. By extension, MR spectroscopy can be used for research with other organs in the human.

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Sintering and Mechanical Properties of Silicon Nitride Prepared with a Low-cost Silicon Nitride Powder (저가의 ββ-상 분말을 사용한 질화규소의 소결 및 기계적 특성)

  • 박우윤;박동수;김해두;한병동
    • Journal of the Korean Ceramic Society
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    • v.38 no.11
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    • pp.987-992
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    • 2001
  • A refractory grade low-cost silicon nitride powder was chemically analyzed, purified, and gas pressure sintered with the sintering additives. As-received powder contained a significant amount of free-Si, 0.72 wt% of Fe, 0.5 wt% of al and 0.31 wt% of Ca. Oxygen and carbon contents of the powder were 3.3 wt% and 0.4 wt%, respectively, and it consisted of 96% of ββ-phase and 4% of αα-phase. After lowering the Fe content and nitriding treatment, the powder was sintered with 6 wt% yttria and 2 wt% alumina for 1 h between 1823 K and 2123 K in order to examine the sintering behavior. Fully dense samples were obtained by sintering at 2123k for 2h. For comparison, a commercially available high-grade powder was also sintered at the same time. The low-cost powder showed much slower densification rate than the high-grade powder. Fully dense sample prepared from the low-cost powder contained a number of coarse grains with a low aspect ratio, and its hardness, fracture toughness, flexural strength and thermal shock resistance were not as good as those of the sample prepared with the high-grade powder.

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Analysis of Factors Influencing upon the Metro Wear Using the Classification and Regression Trees (CART 분석을 이용한 지하철 마모 영향인자 분석)

  • Jeong, Min Chul;Lee, Won Woo;Kim, Jung Hoon;Kong, Jung Sik
    • 한국방재학회:학술대회논문집
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    • 2011.02a
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    • pp.38-38
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    • 2011
  • 일반적으로 레일마모는 열차의 주행안전 및 승차감에 미치는 영향이 크고, 소음 진동의 주요원인으로 작용한다. 또한 레일마모가 발생할 경우 궤도구조의 파괴를 촉진시킴으로써 차량 및 궤도유지보수비를 크게 증가시킨다. 따라서 구간 특성 및 환경 영향 인자 등 현장에서 발생하는 마모 원인을 체계적으로 분석함으로써 마모를 저감할 수 있도록 차량운행 조건과 선로선형 및 궤도구조를 설계하는 것은 중요한 과제이다. CART(Classification And Regression Tree; 분류와 회귀나무) 분석은 패키지화된 좋은 분류 및 예측도구 기법으로 나무의 상위 분리수준에서 일반적으로 나타나는 가장 중요한 입력변수들을 사용하는 등의 입력변수를 선정하는 경우 매우 유용하다. 본 연구에서는 다변수 구간특성 및 환경인자를 고려한 검측 자료 상관관계 분석을 위한 회귀 나무기반 모델(TBM: Tree Based Model) 분석 수행을 위해 지하철 2호선 마모 데이터와 마모 데이터에 영향을 미치는 각종 다변수 구간특성 및 환경인자를 사용하였다. 2호선 지하철의 구간특성 인자 및 환경인자는 레일의 종류, 레일의 위치, 도상, 곡률반경, 캔트 슬랙 및 운행 일수 등으로 구분하였다. 레일의 종류는 ks-50kg과 ks-60kg 두 종류의 레일이 있으며, 레일의 위치는 지상과 지하로 크게 구분할 수 있다. 도상은 콘크리트 도상, 자갈 도상과 일부 구간의 방진상 콘크리트 도상으로 구분할 수 있으며, 곡률반경은 직선구간과 완화곡선 구간 및 최소 250m부터 627m까지 분포된 원 곡선 구간으로 구분할 수 있다. 캔트 간격은 최소 96cm 부터 120cm 간격으로 구분하며, 슬랙은 5~9cm에 분포하고, 운행 기간은 해당 기간 동안 유지보수 이력이 없는 구간을 선정하여 2005년부터 2006년까지 4번에 걸쳐 검측된 지하철 2호선 내선 마모데이터를 사용하였다. 총 X1부터 X7까지 총 7개의 구간특성 또는 환경특성을 영향인자로 선정하였으며, 이러한 영향인자에 의해 결정되는 종속 인자로 Y1인 직마모와 Y2인 측마모를 선정하여 이 중 실질적으로 지하철 궤도의 성능 평가에 주요 판단인자로 사용되는 측마모와 구간특성 및 환경영향인자와의 상관관계 분석을 수행하였다. 해당 마모 데이터가 검측되는 기간 동안 유지보수 이력이 없는 12272 point의 데이터를 검출하였고 CART 프로그램을 이용하여 데이터를 분석하였으며, CART 프로그램의 해석을 위해 종속변수인 직마모량은 각 검측 지점의 마모량에 해당하는 등급으로 변환하여 분석을 수행하였다. 레일의 마모에 영향을 미치는 구간특성 및 환경인자와 종속 변수로 사용된 레일의 마모량 사이의 CART를 이용한 상관관계 분석은 실제 구조물에서 영향인자간의 상관 관계와 유사하며, 추후 연구에서는 이를 바탕으로 하여 정량화된 검측 데이터를 종속변수로 하여 구간특성 또는 환경인자 등 외부 영향인자를 고려한 궤도 검측데이터와의 상관관계 분석을 수행할 계획이다.

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A Study on the Optimization Methods of Security Risk Analysis and Management (경비위험 분석 및 관리의 최적화 방안에 관한 연구)

  • Lee, Doo-Suck
    • Korean Security Journal
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    • no.10
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    • pp.189-213
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    • 2005
  • Risk management should be controlled systematically by effectively evaluating and suggesting countermeasures against the various risks which are followed by the change of the society and environment. These days, enterprise risk management became a new trend in the field. The first step in risk analysis is to recognize the risk factors, that is to verify the vulnerabilities of loss in the security facilities. The second step is to consider the probability of loss in assessing the risk factors. And the third step is to evaluate the criticality of loss. The security manager will determine the assessment grades and then the risk levels of each risk factor, on the basis of the result of risk analysis which includes the assessment of vulnerability, the provability of loss and the criticality. It is of great importance to put the result of risk analysis in mathematical statement for a scientific approach to risk management. Using the risk levels gained from the risk analysis, the security manager can develop a comprehensive and supplementary security plan. In planning the risk management measures to prepare against and minimize the loss, insurance is one of the best loss-prevention programs. However, insurance in and of itself is no longer able to meet the security challenges faced by major corporations. The security manager have to consider the cost-effectiveness, to suggest the productive risk management alternatives by using the security files which contains every information about the security matters. Also he/she have to reinforce the company regulations on security and safety, and to execute education repeatedly on security and risk management. Risk management makes the most efficient before-the-loss arrangement for and after-the-loss continuation of a business. So it is very much important to suggest a best cost-effective and realistic alternatives for optimizing risk management above all, and this function should by maintained and developed continuously and repeatedly.

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Development of harmful algae collecting system for agricultural material recycling (농업재료 자원화를 위한 유해조류 포집 시스템 개발)

  • Kim, J.H.;Kim, J.M.;Jeong, Y. W.;Kwack, Y.K.;Sim, S.K.
    • Proceedings of the Korea Water Resources Association Conference
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    • 2022.05a
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    • pp.50-50
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    • 2022
  • 한국농어촌공사 산하의 농업용저수지 중 3786개소에 대한 수질조사를 '19년도에 실시한 결과, TOC 기준 4등급 초과 저수지 비율은 약 20%로써, 도심 근교 저수지에서 녹조현상 빈발로 인해 수질, 악취, 미관 등의 환경문제 개선 민원이 다수 발생하고 있다. 현재 녹조 발생 사후관리를 위해 주로 사용되고 있는 대형 조류제거선은 저수심 수변부에서의 적용성에 한계가 있고, Al 기반의 응집제를 사용하여 조류를 수거해서 폐기하고 있는 실정이다. (주)이엔이티는 농어촌연구원, (주)코레드, (주)삼호인넷과 함께 호소나 정체하천의 수변지역에 적용될 수 있는 저에너지형 유해조류 포집시스템 개발과, 수거된 조류부산물을 무독화하여 농업재료로 재활용하는 방안을 연구하고 있다. 저수지나 정체수역의 녹조는 바람, 수면유동 등에 의해 수변에 집적되는 특성이 있어, 인공지능 기술로 녹조현상을 감시하여 조류 밀집구간에 접근할 수 있는 자율이동식 수상이동장치를 개발 중이다. 수상이동장치는 조류포집장치를 탑재하기 위한 부력체, 원격 운전이 가능한 무인항법장치, 수변식생대 및 저수심지역 이동을 고려한 수차방식 추진체, 전체 장치의 전원 공급을 위한 고성능 배터리 등으로 구성하여 상세 도면 설계를 진행하고 있다. 조류포집장치에는 표층에 주로 분포하는 남조류를 선택 흡입하는 포집 부표를 적용하였고, Al계 응집제 사용을 배제한 분리막 실험을 통해 침지형 막분리조 및 가압형 농축조를 설계하였다. 유해조류 포집 및 농축은 수상에서 이동체에 탑재하여 이뤄지고, 육상에서는 자원 회수가 가능하도록 회분식 응집공정으로 구분하였다. 조류 밀집지역에서 수거된 조류의 무독화 및 농업재료 자원화 타당성 평가를 위해 특용 버섯균주를 활용한 시료별 분석항목을 선정하고 실험 매트릭스에 따라 실증실험을 수행하였다. 수거조류를 전처리하여 성분 및 발열량을 분석하고 버섯재배 전후의 마이크로시스틴 독소(LR, RR, LR)를 포함한 성분 분석을 수행하여, 고체연료, 비료 및 사료로 활용방안을 검토하였다. 무인자율이동 조류포집장치는 실증화 규모로 제작하여 기선정된 테스트베드에서 현장적용성 평가를 수행할 예정이다. 본 연구를 통해 개발된 유해조류 포집 시스템은 기존의 녹조제거 방안을 보완하여 정체수역의 생태계 복원 및 친수공간의 환경개선 등에 적용되며, 무독화가 입증된 유해조류의 농업재료 자원화 기술은 고부가 상품 개발 및 환경폐기물 감축에 활용될 것이다.

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Probable Effect of Rumble Strips on Reduction of Traffic Accidents (노면요철포장으로 인한 사고감소 효과)

  • Oh, Heung-Un;Chang, Jung-Hwa
    • International Journal of Highway Engineering
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    • v.9 no.4
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    • pp.65-74
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    • 2007
  • There have been research and studies on rumble strip effectiveness in terms of accident reduction since rumble strips were first installed in 1950's. Research has shown that rumble strips reduce accidents from drowsy and inattentive driving. The present research statistically analyze the accident reduction effect of rumble strips based on accident reports obtained from rumble strip installed 377 places of nation wide freeway lines. Based on the results, rumble strips are effective in reducing accident frequencies 32.3%. The probable various factors inducing accidents are identified. These include drowsiness, speeding, inattentiveness, vehicle defectiveness, and short headways. It was found that rumble strips are effective in reducing A, B, C leveled accidents, and in reducing clear, cloudy, and rainy weather accidents. The results may make clear and expand probable types of accidents that rumble strips would reduce, then reduce the total accidents on freeway lines.

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