• 제목/요약/키워드: Internal Partition

검색결과 32건 처리시간 0.029초

단순 확장 관 내부 파티션이 음향 투과손실에 미치는 영향해석 (Influence of Internal Partition of Simple Extension Chamber on the Acoustic Transmission Loss)

  • 박정필;정의봉;안세진
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2014년도 추계학술대회 논문집
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    • pp.690-692
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    • 2014
  • To identify characterization of a simple extension chamber that have the two internal partition, produce the curve to estimate the transmission loss without the computer analysis. For helpful for internal optimum design, identify the characteristic of internal partition on transmission loss. Made estimated transmission loss curve by function of relationship of internal partition and transmission. Check the similarity of predicted transmission loss and analysis transmission loss. Usage of the predicted transmission loss made by relationship of internal partition and transmission loss is good information to place the internal partition so as to maximize the transmission loss on target frequency at optimal design on muffler.

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한국산 저질무연탄 연소용 순환식유동층 연소로 개발(간막이벽과 내부노즐을 설치한 순환유동층내에서의 유체거동) (Technical Development for the Circulating Fluidized Bed Combustor of firing Korean Low Grade Anthracite Coals (Particle Flow Patterns in a Circulating Fluidized-Bed with an internal Nozzle and a Partition Wall))

  • 이관석
    • 열처리공학회지
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    • 제6권4호
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    • pp.243-248
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    • 1993
  • A Circulating Fluidized-Bed (CFB) with an internal nozzle and a partition wall was proposed. The technique of fluidization is related to operations first used commercially in the fields of metallurgical and mechanical engineering such as the heat treatment of metals and power station combustors. In the modified CFB, an internal nozzle and a partition wall were additionally set in the main bed. This cold mode CFB apparatus made of acrylic resin; the main bed is 1,500mm high and 100mm in the inner diameter, the internal nozzle is 130mm high and 10mm in the inner diameter, and the partition wall is 7mm thick and 100mm in the diameter. Glass beads of $89{\mu}m$ in the mean diameter were employed as bed materials.

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4각 순환유동층의 수력학적 특성 (Hydrodynamic Characteristics of the Rectangular Type Circulating Fluidized Bed)

  • 현상열;이관석
    • 열처리공학회지
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    • 제10권4호
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    • pp.232-236
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    • 1997
  • A rectangular type circulating fluidized bed (CFB) with an internal nozzle and two partition walls was proposed. In this modified CFB, an internal nozzle and two slanted partition walls were additionally set in the riser. This cold mode apparatus was made of acrylic resin; the riser was 1500mm high and $1000{\times}1000mm^2$ in the cross sectional area, the internal nozzle was 200mm high and 10mm in the inner diameter, and the partition wall was 7mm thick. Glass beads of $91{\mu}m$ in the mean diameter were employed as bed materials. In the cold mode by using the proposed CFB with an internal nozzle, it was possible to change the particle hold up by changing the gas flow ratio of the nozzle to the total(Qn/Qt). It was found that the inflection point which devided the bed structure between the dense and the dilute phase in the riser varied with Qn/Qt.

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클라우드 환경에서 블록체인관리서버를 이용한 인증기반 내부망 분리 보안 모델 (Internal Network Partition Security Model Based Authentication using BlockChain Management Server in Cloud Environment)

  • 김영수;이병엽
    • 한국콘텐츠학회논문지
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    • 제18권6호
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    • pp.434-442
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    • 2018
  • 오늘날 보안 위협이 점차 증가하고, 인터넷을 통한 외부악성 코드에 감염된 디바이스에 의해서 중요 데이터가 유출되는 피해가 증가하고 있다. 따라서 내부망에 연결된 디바이스에 대한 인증을 통해서 업무용 서버로의 접근을 차단하는 내부망 분리 모델이 필요하다. 이를 위한 VDI (Virtual Desktop Infrastructure)방식을 사용한 논리적 망 분리는 내부망에 연결된 물리 디바이스와 가상 디바이스 간에는 정보 교환이 차단되는 방식으로 중요 데이터의 유출을 방지하고 있으나 미등록 디바이스를 사용하여 내부망의 업무용 서버에 접근하여 중요 자료를 유출하는 공격에는 취약하다. 따라서 이의 해결책으로 VDI(Virtual Desktop Infrastructure) 기술에 블록체인 기술을 수용하여 블록체인 기반 망 분리 모델을 제안한다. 이는 VDIVirtual Desktop Infrastructure) 방식의 논리적 망 분리의 보안 취약점인 디바이스의 위변조에 대한 식별 능력과 디바이스의 무결성 강화를 통한 내부의 중요 데이터의 유출 위협을 감소시키는데 기여한다.

신포괄수가 시범사업 모형개선이 건강보험 보장률에 미친 영향 (The Effect of Reform of New Diagnosis-Related Groups on Coverage of National Health Insurance)

  • 최정규;김선희;장정하;윤종민;강중구
    • 보건행정학회지
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    • 제30권2호
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    • pp.178-184
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    • 2020
  • Background: Korea set up a new diagnosis-related group as a demonstration project in 2009. The new diagnosis-related group was reformed in 2016. The main purpose of the study is to identify the effect of reform on coverage of national health insurance. Methods: This study collected inpatient data from a hospital that contains medical information and cost from 2015 July to 2016 June. The dependent variable was the coverage of national health insurance. The dependent variable was divided by total, internal medicine partition, surgical partition, and psychiatric partition. To analyze the effect of the reform, this study conducted an interrupted time series analysis. The final sample included 23,695. Results: The health insurance coverage of internal medicine has the highest, followed by surgery and psychiatry. The health insurance coverage of bundle payment is higher than that of unbundled payment. The proportion of bundled payment and non-benefit decreased and the proportion of unbundled payment increased. The coverage of national health insurance significantly increased after policy reform in internal medicine partition (p-value=0.0356). Conclusion: The results of the study imply that policy reform enhanced the coverage of national health insurance in internal medicine. The government needs to monitor side effects such as an increase of unbundled payment.

단순확장관 내부 파티션 위치에 따른 음향투과손실 계산식의 개발 (Development of a Formula for Acoustic Transmission Loss According to Partition Positions in a Simple Expansion Chamber)

  • 박정필;배경원;정의봉;안세진
    • 한국소음진동공학회논문집
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    • 제25권2호
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    • pp.116-123
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    • 2015
  • This paper proposed a new formula for predicting acoustic power transmission loss of simple expansion chamber with two internal partitions. Seventeen cases of computational results were performed and the database was constructed for the TL according to the various positions of internal partitions. Using this database, firstly, the formula for the peak values of TL at certain frequencies was developed using the least square estimation. Secondly, the formula for the TL curve could be obtained automatically with the input data of the positions of two internal partitions. The formula of TL developed in this paper showed good agreement with computational results. This formula will be helpful for the positioning of internal partitions to improve TL at target frequencies.

법인 아닌 사단의 법률관계 (Legal Issues on the Association without Legal Personality)

  • 소재열
    • 한국콘텐츠학회논문지
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    • 제12권5호
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    • pp.188-198
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    • 2012
  • 교회는 법인 아닌 사단으로 인정되는 단체 중의 하나이며, 법인 아닌 사단에 관한 민법의 일반 이론에 따라 교회 실체를 파악하고 교회의 재산귀속에 대해서 판단한다. 법인 아닌 사단의 내부관계는 일차적으로 정관의 적용을 받고 정관의 규정이 없는 경우에는 총회 결의와 민법의 사단법인에 관한 규정을 유추적용하게 된다. 법인 아닌 사단의 채무에 대해서는 사원의 준총유이다(제275조, 제278조). 지난 50여년 동안 대법원 판례는 법인 아닌 사단인 개신교 교회에 대하여서만은 일반적인 법리와는 달리, 교회의 분열을 허용하고 분열시의 재산관계는 분열당시의 교인들의 총유라고 판시했다. 새로운 판례(대법원 2006. 4. 20. 선고 2004다37775 전원합의체판결)는 법인 아닌 사단의 분열은 허용되지 않으므로 비법인 사단의 분쟁해결을 위해 대법원은 종전의 분열인정에서 부인하는 쪽으로 판례를 변경한 것은 분쟁을 해결해야 한다는 당위성이 반영된 것으로 이해된다.

호흡곤란환자의 입-퇴원 분석을 위한 규칙가중치 기반 퍼지 분류모델 (Rule Weight-Based Fuzzy Classification Model for Analyzing Admission-Discharge of Dyspnea Patients)

  • 손창식;신아미;이영동;박형섭;박희준;김윤년
    • 대한의용생체공학회:의공학회지
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    • 제31권1호
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    • pp.40-49
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    • 2010
  • A rule weight -based fuzzy classification model is proposed to analyze the patterns of admission-discharge of patients as a previous research for differential diagnosis of dyspnea. The proposed model is automatically generated from a labeled data set, supervised learning strategy, using three procedure methodology: i) select fuzzy partition regions from spatial distribution of data; ii) generate fuzzy membership functions from the selected partition regions; and iii) extract a set of candidate rules and resolve a conflict problem among the candidate rules. The effectiveness of the proposed fuzzy classification model was demonstrated by comparing the experimental results for the dyspnea patients' data set with 11 features selected from 55 features by clinicians with those obtained using the conventional classification methods, such as standard fuzzy classifier without rule weights, C4.5, QDA, kNN, and SVMs.

중수의 열역학적 성질과 흡착특성 (Statistical Thermodynamical Properties and Adsorption Characteristics of Heavy Water)

  • 조창현;박형석;장세헌
    • 대한화학회지
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    • 제15권6호
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    • pp.285-293
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    • 1971
  • The statistical thermodynamical properties of heavy water are calculated according to the transient state theory of significant liquid structure. The calculated values are shown to be in good agreement with the observed ones. The grand canonical ensemble partition function for the adsorbed phase of heavy water on graphite surface is derived using the theory. The adsorption isotherm, the surface pressure, the molar entropy and the molar internal energy for the adsorbed phase and then the molar heat of adsorption are calculated according to the derived partition function. The thermodynamic properties of the adsorbed water are also calculated and the results are compared with those of heavy water and discussed in view of the experimentally observed phenomena.

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