• 한국도서관정보학회지
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• 제48권1호
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• pp.1-20
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• 2017

공공도서관은 지역주민이 가장 자주 이용하는 문화인프라, 평생학습 공간, 사회적 공공시설이다. 이러한 다목적 정체성에 부응할 의도로 많은 공공도서관이 최근에 개방형, 다기능성, 연계성을 강조하는 방향으로 공간구조를 변경 또는 재구성하고 있다. 이에 따른 소음문제가 주요 환경변수의 하나로 부상함에 따라 소음관리가 이용자 친화적인 도서관인지를 판단하는 잣대로 간주될 수밖에 있다. 본 연구는 대구시 공공도서관을 대상으로 공간별 소음수준을 측정하여 국내외 기준과 비교 분석한 다음에 다양한 저감방안을 제시하였다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제9권1호
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• pp.29-36
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• 2009

Power supply noise is fundamentally caused by large current peaks. Since large current peaks are induced by simultaneous switching of many circuit elements, power supply noise can be minimized by deliberate clock scheduling which utilizes nonzero clock skew. In this paper, nonzero skew clock scheduling is used to avoid the large peak current and consequently reduce power supply noise. While previous approaches require extra characterization efforts to acquire current waveform of a circuit, we approximate it only with existing cell library information to be easily adapted to conventional design flow. A simulated annealing based algorithm is performed, and the peak current values are estimated for feasible clock schedules found by the algorithm. The clock schedule with the minimum peak current is selected for a solution. Experimental results on ISCAS89 benchmark circuits show that the proposed method can effectively reduce the peak current.

• 한국농촌건축학회논문집
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• 제14권1호
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• pp.1-8
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• 2012

This study was to analyze physical condition on the dormitory high school in Jeonju City, and find out users' satisfaction on that. This was going to contribute to the directions of it's physical environmental improvement. This was performed by a questionnaire survey method. Data were collected from 200 students, who had been dwelling 4 high school dormitories in Jeonju City. Through analyzing those data about library, diningroom, laundry room, break room, computer room, restroom, shower room, hall lounge, and snack bar in a dormitory, the results are as follows. First, students thought some physical conditions to be inconvenient in an distracted study atmosphere and hard furniture of library, a bad location of diningroom, a short laundry machine, lack of tables in a break room, a short performance and supply computer, a small space and short toilet in restroom, and a short of hall lounge and snack bar. Second, the students' satisfaction of common public areas in dormitory was 3.39 score. Students were concerned with library and restroom shower room through analyzing satisfied and unsatisfied areas. Third, they needed to improve heating, cooling, and noise in common areas of dormitory, and needed to support a breakroom and snack bar. Conclusively, library, restroom shower room, break room, and snack bar were important common areas, and indoor environmental elements - heating, cooling and noise- were important in high school dormitory.

• 한국안전학회지
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• 제14권3호
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• pp.140-145
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• 1999

In this study, noise analyses were performed toward ten school and one library-building adjacent to road. In particular, noise levels measured in the case-study city were compared to those from environmental noise standard as well as to encouraged noise level. In the analyses, the following conclusions are emphasized in order to make comfortable educational learning environment. 1) When windows were open, the measured noise level of 9 schools exceeded the encouraged noise level. In order to mitigate the exceeded level, it is necessary to plant trees or lawn and install soundproofing wall. 2) When windows were closed, the measured noise level of the most schools showed lower than that of encouraged level. For sound insulation, installing both double window and casement window are required. 3) Schoolhouse's vertical arrangement from the road in order to minimize the expected noise effect, and provision of green space by which visual hiding as well as psychological comfort are presumably achieved.

• Advances in environmental research
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• 제4권4호
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• pp.211-218
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• 2015

Traffic noise estimation models are useful in evaluation of the noise pollution in current circumstances. They are helpful tools for design and planning new roads and highways. Measurement of average traffic noise level is possible when traffic speed and volume are known. The objective of this study was to devise a model for prediction of highway traffic noise levels based on current traffic variables in Iran. The design of this model was to take the impact of traffic congestion into consideration and to be field tested. This study is a library research augmented by field study conducted on Saeedi Highway located south west of Tehran. The period for the field study lasted 5 days from 7-12 February, 2013. This study examined liner and non-liner methods in formulation of its model. Liner method without a fixed coefficient was the best fit for the intended model. The proposed model can serve as a decision making tool to estimate the impact of key influential factors on sound pressure levels in urban areas in Iran.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.861-863
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• 2003

In this work, the preparations and characteristics of capacitors and inductors for RF IC as a integrated devices are investigated. These kinds of capacitors and inductors can be applicable to the passive components utilized in voltage controlled oscillator(VCO), low noise amplifier(LAN), mixer and synthesizer for mobile telecommunication of radio frequency band(900 MHz to 2.2GHz), and in a library of monolithic microwave integrated circuit(MMIC). The results show that these inductors and capacitors array for RF IC may be applicable to the RF IC passive components for mobile telecommunication.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 춘계학술대회
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• pp.274-276
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• 2010

노트북 시스템의 소음 원으로는 크게 3가지가 있는데 HDD, System Cooling Fan 그리고 ODD로 나뉠 수 있다. 이 중 HDD를 제외한 다른 두 가지는 사용자가 소음을 인지하고 받아들이는데 무리가 없지만 HDD는 소음 발생 이유를 납득하기가 어렵다. 즉, System Fan은 CPU와 Chipset의 온도를 낮추어야 하니 반드시 필요한 소음으로 인지하고, ODD는 필요시에만 동작하여 소음을 발생하니 소음이라고 생각하지 않는다. 하지만 HDD의 경우 사용자가 HDD를 Access하지 않아도 Disk 작업이 발생하는 경우가 있는데(캐쉬 정리, Defragmentation 등) 이 때에는 사용자가 소음을 납득하지 않는다. 더군다나 도서관이나 새벽의 방 안에서처럼 조용한 환경에서 사용 시에는 더욱 더 소음이 두드러져 사용자의 불만을 야기하게 된다. 이에 사용자가 소음에 대해 거부감을 갖지 않고 HDD의 감성불만인 소음에 대해 Claim을 제기하지 않도록 HDD의 소음 수준을 낮추는 알고리즘을 개발하고 적용하는 방법에 대해 연구한다.

• 한국항행학회논문지
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• 제25권6호
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• pp.562-568
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• 2021

도서관 열람실의 좌석 예약 및 민원처리 업무는 그동안 관리자에 의해 대면으로 이루어져 왔으며 효율적인 관리가 어려웠다. 또한 열람실 이용자 간 소음 문제 등과 같이 이용자 불편에 따른 민원 발생 때 조치가 어려운 문제도 있다. 이 연구에서는 도서관 열람실 좌석의 효율적인 관리를 위해 온라인 예약시스템을 개발하여 비대면으로 서비스될 수 있게 하였으며, 도서관 열람실 사용 시 이용자 간 소음 문제, 소지품 분실, 이용자의 수면 중 코골이 등으로 민원이 발생 시 비대면 민원 신청이 가능하게 하였다. 관리자는 비대면의 불편 신고 접수를 통해 도서관 열람실 사용의 원활한 관리와 이용자의 불편을 해소하고 도서관 이용의 만족도를 높일 수 있다. 개발된 서비스 앱은 좌석 예약과 익명의 불편 신고가 가능하며, 관리자는 접수된 불편 신고내용을 확인하여 해당 좌석의 이용자에게 IoT 센서 기반의 LED로 주의 경고를 할 수 있으며, 시정 조치가 완료되면 신고자에게 조치 결과를 피드백할 수 있다.

• 한국도서관정보학회지
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• 제30권3호
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• pp.295-322
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• 1999

The purpose of this study is to identify and present the solution to the problems of KORMARC on Disc, which was produced by the National Library of Korea and is being distributed nationwide. Currently, KORMARC on Disc has reached the serious level of duplicates of input record, error on input data and noise of retrieval. Futhermore, input data is not in accordance with KORMARC Rules for Descriptive Cataloging, thus generating many problems. Of all thing, since current MARC system itself is based on manual system, it does not correspond effectively to the online environment. Accordingly, in order to elevate the quality of KORMARC database, current problems must be resolved, at the same time, korea Machine Readable Cataloging must be modified into a format, more suitable to Machine Readable environment. Consequently, the current study analyzes and identifies problems of data in KORMARC on Disc, at the same time, it examines currently used KORMARC Format and Korea machine Readable Cataloging Rules for descriptive Cataloging as to provide easier usage and guidelines for accurate data inputs.

• 대한원격탐사학회지
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• 제34권4호
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• pp.649-659
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• 2018

The aim of this study is to develop a protocol for obtaining spectral signals that are robust to varying lighting conditions, which are often found in the Polar regions, for creating a spectral library specific to those regions. Because hyperspectral image (HSI)-derived spectra are collected on the same scale as images, they can be directly associated with image data. However, it is challenging to find precise and robust spectra that can be used for a spectral library from images taken under different lighting conditions. Hence, this study proposes a new radiometric calibration protocol that incorporates radiometric targets with a traditional vicarious calibration approach to solve issues in image-based spectrum measurements. HSIs obtained by the proposed method under different illumination levels are visually uniform and do not include any artifacts such as stripes or random noise. The extracted spectra capture spectral characteristics such as reflectance curve shapes and absorption features better than those that have not been calibrated. The results are also validated quantitatively. The calibrated spectra are shown to be very robust to varying lighting conditions and hence are suitable for a spectral library specific to the Polar regions.