• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 춘계학술대회
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• pp.574-575
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• 2018

무선 센서 네트워크에서 공간적-시간적 상관관계에 따른 중복 데이터의 발생은 데이터 전송 시에 불필요한 에너지를 소모하여 네트워크 수명을 감소시킨다. 본 논문에서는 먼지 센서를 통한 데이터 수집 실험을 진행하여 공간적-시간적 데이터 중복을 확인하고 이를 해결하기 위해 데이터 전송 허용범위 설정 방법을 제안한다. 제안하는 방법은 클러스터 내의 통합 평균값을 이용하여 데이터 전송 허용범위를 설정한다. 설정된 허용범위는 멤버 노드의 중복 데이터를 감소시키며 클러스터 헤드에서 허용범위 재설정을 통해 수집 데이터의 가변적인 환경에서도 중복 데이터 감소가 가능함을 보인다.

• 한국안전학회지
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• 제15권3호
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• pp.88-95
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• 2000

The level of noise produced by machinery and its arrangement insides a factory is indicated to be a maximum of 96.1 dB(A). The maximum level of noise from a commoner's house outside the factory is shown to be 62.9 dB(A), which exceeds 60 dB(A), the permitted limit of noise level in a time period of day. us study has predicted the level of noise reduction according to a step by step prevention plan by considering the characteristics of the causes of noise, the permitted limit of noise levels, problems and economical efficiency attendant upon the noise prevention measures. Establishing target levels of noise each of the three steps of the noise prevention plan. The predicted level of noise at the place of a commoner's house in accordance with the first step is 50.0 - 59.0 dB(A), and can satisfy the permitted limit of noise in a time period of the day. In taking prevention measures for the second step, the noise level is 50.7 - 53.6 dB(A) which is less than 55 dB(A) in a time period of the evening, the permitted limit of noise in a time period of night., and it can meet 47.4 - 50.3 dB(A) in the third step.

• 수산해양교육연구
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• 제29권3호
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• pp.811-821
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• 2017

This paper intends to propose the direction for improving the welfare space in crew accommodation of fishing vessels engaged in coastal and inshore fishery business in order to solve the phenomenon which young fishers trend to avoid working on fishing vessels. Coastal and inshore fisheries are defined as permitted fisheries business under the Fisheries Act and classified into coastal fisheries and inshore fisheries based on a gross tonnage of 10 tons. Fisheries Act also stipulates the upper limit tonnage regulation and the restrictions on bottoms of fishing vessels permitted for coastal and inshore fisheries to protect fishery resources and to prevent overfishing. It is difficult to increase the welfare space in crew accommodation of fishers under such restrictions because the welfare space in crew accommodation could be secured by reducing the space for the strength of fishing. Therefore, this paper compares the revision trend of the international convention(The Work in Fishing Convention, 2007) and domestic laws on welfare space in crew accommodation of fishing vessels engaged in coastal and inshore fishery business to find out the problems and improvement points in securing the welfare space in crew accommodation of fishing vessels. As a result, it is proposed to revise the Enforcement Ordinance of the Fisheries Act so as to secure the welfare space in crew accommodation of coastal and inshore fishing vessels within the scope of maintaining the maximum allowable tonnage limit regulation by adding an exemption provisions of the restrictions on bottoms of fishing vessels in which case the gross tonnage is increased for securing the spaces for crew accommodation and sanitary facilities of fishers without increasing net tonnage where the bottoms of fishing vessels is increased by renovating or replacing the fishing vessels bigger than the bottoms of fishing vessels permitted within the scope of maintaining the maximum allowable tonnage limit regulation.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.212-216
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• 2006

The purpose of this study is to obtain an effective enclosing method for noise reduction of press machine operating in a manufacturing company located in Korea. Noise level of the machine is about $90{\sim}105dB$ which is higher than legal standards by industrial safety and health law. This study has predicted the level of noise reduction according to a step by step prevention plan by considering the characteristics of the cause of noise, the permitted limit of noise levels, problems and economical efficiency attendant upon the noise prevention measures. The predicted level of noise at the plant in accordance with the first step is $71.5{\sim}89.5dB(A)$, and can satisfy the permitted limit of noise in a time period of the day. Based on these results, enclosing method adequate for the selected plant's noise characteristics were suggested.

• 한국식품조리과학회지
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• 제23권4호통권100호
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• pp.567-578
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• 2007

This study was designed to provide basic data for the application and practical use of vinegar disinfection for raw vegetable preparation in foodservice operations. The test materials were washed and disinfected by three different methods(tap water washing, chlorine water disinfection, vinegar disinfection) and stored at $3^{\circ}C$ and $10^{\circ}C$ for 7 days. Then, their microbiological qualities were compared. Total plate counts increased over the course of the storage period, and all samples, except in the case of tap water washing, remained under the permitted limit until the 7th day of storage. In particular, vinegar disinfection showed the lowest increase in total plate counts(2.35${\sim}$4.03 log CFU/g). While the total plate counts of chlorine and vinegar disinfection were within the 6.00 limit of microbiological safety, the tap water washing treatment passed the permitted limit. The psychrotrophic counts increased steadily over the course of the storage period, and increased least at $3^{\circ}C$, however, the tap water washing showed the most drastic increase, while vinegar disinfection yielded the smallest increase.

• 대한디지털의료영상학회논문지
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• 제12권2호
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• pp.139-143
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• 2010

Two-dimensional(2D) images like Multi Planar Reconstruction(MPR) Image or Maximum Intensity Projection(MIP) were used for the purpose of diagnosis, but MPR image's quality were limited due to its superior limit of Z-axis ability to produce permitted radiation exposure virtuous in the permitted time limit from the existing Spiral CT. However, in company with the development of the Multi Detector Computed Tomography(MDCT), we were able to get the Data with the equal amount of Voxel, also get varied reconstructions as in the aspect of our needs. This present study propose a reconstruction technique which is to extract a field using Region of interest(ROI) segmentation method for improvement of the quality of the medical image and after that reconstruct the concerned part using the four-directed symmetry method of the oval, than using the reconstructed data, reorganize the image by using the Curved MPR method. If current proposed method is used, it is highly effective because of its ability to accurately display the disease concerned part, which will reduce the decoding time and also effectively provide information based on the accuracy of the decode.

• 한국정밀공학회지
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• 제17권8호
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• pp.71-77
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• 2000

The built-in spindle motor for high-speed machine tools is designed and developed by Corporate R&D Institute of DAEWOO Heavy Industries LTD. The heat analysis program for the built-in spindle motor is developed by using lumped method. For the purpose of verification of the program comparison analyses between experiments and calculations are performed on the three motors ; DHI prototype of built-in spindle motor built-in spindle motor sample A and sample B As results calculated temperature distributions are in good agreement with the test results within the average error of 10% Calculated results of all the built-in spindle motors show that maximum temperature rise at high speed remains in the operating condition without exceeding the permitted limit but they exceeded the permitted limit of temperature rise at low speed.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.271-274
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• 2002

This paper presents tile efficient polling architecture for simple network management protocol (SNMP). Now a day, tile internet traffics have been increasing rapidly within a few years as the subscriber's network to connect internet is provided commonly. With this trend, the network management traffics also make the same phases. To provide numerous higher Quality services to the customers, the management traffic must be controlled within the permitted limit. This paper proposes the policy-based felling architecture for SNMP MIB with several parameters and suggests the data collecting layer architecture for the efficient polling.

• 콘크리트학회논문집
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• 제26권4호
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• pp.457-463
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• 2014

이 연구는 화학혼화제 인수검사 기준으로 활용할 수 있는 고형분량 변동이 콘크리트 품질에 미치는 영향에 대해 살펴보는데 그 목적을 두었다. 현재 한국도로공사의 잠정기준으로 운용 중인 ASTM C 494 기반의 고형분량 변동범위 ${\pm}12%$는 혼화제의 종류 및 고형분량의 특성을 반영하지 못해 혼화제 종류에 따라 상이하게 나타났다. 고형분량 변동에 따른 콘크리트의 품질 변동을 평가한 결과 리그닌은 감수율이 낮은 관계로 고형분량의 변동범위가 큰 반면 나프탈렌계 및 폴리칼본산계 고성능감수제는 높은 감수율로 인하여 인수검사 기준으로 활용 중인 고형분량의 차이에 대한 허용범위 재조정이 요구되었다.

• 한국통신학회논문지
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• 제26권11A호
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• pp.1812-1819
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• 2001

본 논문에서는 OSR=25에서 1 [MHz] 신호 대역폭, 12-비트 해상도를 만족하는 SOSOC $\Sigma$-Δ길 변조기 설계를 위하여 아날로그 비이상성 허용범위를 조사하였다. 공급전압 3.3 [V]에서 사양을 만족하는 $\Sigma$-Δ 변조기 설계를 위하여 우선 저전압에 적합한 SOSOC $\Sigma$-Δ 변조기 모델과 이득계수를 구하였다. 그리고 아날로그 비이상성인 증폭기 유한한 이득, SR, 폐루프 극점, 스위치 ON 저항 그리고 캐패시터 부정합과 같은 $\Sigma$-Δ 변조기의 성능 저하 요인들을 이상적인 $\Sigma$-Δ 변조기 모델에 첨가하여 $\Sigma$-Δ 변조기의 성능 예측과 비 이상성의 허용범위를 규정하였다. 이를 토대로 사양을 만족하는 $\Sigma$-Δ 변조기 설계 시 $\Sigma$-Δ 변조기를 구성하는 회로의 사양에 대한 지침과 $\Sigma$-Δ 변조기의 성능을 예측 할 수 있다.