• Title/Summary/Keyword: collection

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An Analysis on the Situation of Collection and Utilization of the Trees Damaged by Pine Wilt Disease (소나무재선충 피해목의 수집 및 활용에 대한 현황 분석)

  • Kim, Jae-Hwan;Seo, In-Gyo;Park, Sang-Jun
    • Journal of Environmental Science International
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    • v.25 no.1
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    • pp.127-134
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    • 2016
  • This study is conducted to get current state of data collection and utilization of the trees damaged by pine wilt disease, and to efficiently collect and utilize of the trees damaged by the pine wilt disease and abandoned fumigation-treated trees at forecasts. The method to control pine wilt disease damaged area is mostly fumigation treatment system, and there is no collection and utilization of damaged trees because of absence of efficient collection system, lack of collection cost, and absence of policy, etc. A survey is conducted that asked about the satisfaction degree for the trees damaged by pine wilt disease collection and use divided into 6 topics. It was positively recognized that the need and problem of the trees damaged by pine wilt disease, and results and satisfaction of forestry mechanization while it was mostly negatively recognized that the policy satisfaction for prevention and collection, satisfaction of collection and use, collection and forestry mechanization, and satisfaction of foundation equipment for forestry mechanization, etc. As a result of path analysis, it is necessary to promote a high-tech forestry mechanization to improve satisfaction level of results and satisfaction of forestry mechanization for the trees damaged by pine wilt disease collection and utilization, it is also need to make an effort in various ways for improve satisfaction level of satisfaction of collection and utilization.

A Study on Configuring dCollection as the Linked Data (dCollection의 링크드 데이터 구축에 관한 연구)

  • Noh, Young-Hee
    • Journal of Korean Library and Information Science Society
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    • v.43 no.2
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    • pp.247-271
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    • 2012
  • The institutional repository and linked data share a purpose, co-creation and joint usage of information resources. Therefore, a new approach linking these two concepts can be utilized for co-production and utilization of resources. This study hoped to configure the Korean dCollection repository as linked data. For this purpose, first, we analyzed the current data structure of dColleciton. Second, we investigated the resource types which dCollection is targeting. Third, we focused and analyzed a case study of resource types targeted by dCollection constructed as linked data. Fourth, this study examined in detail how to build the linked dCollection data and how to connect this linked data to the linked cloud. Finally, we discussed the problems that might oc cur in the process of building the linked data.

Simplified Tag Collection Algorithm for Improving Performance of Active RFID System (능동형 RFID 시스템의 성능 개선을 위한 간소화된 태그 수집 알고리즘)

  • Lim, Intaek
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.21 no.4
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    • pp.731-736
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    • 2017
  • In this paper, we propose a simplified tag collection algorithm to improve the performances of ISO/IEC 18000-7, which is a standard for an active RFID system. The proposed algorithm modifies the collection command that enables to start a tag collection round. The modified collection command includes the results of the listen period response for the previous collection round. Tags that receive the collection command check the collision status for their responses. If there is no collision, tags transmit their additional data and go into the sleep mode without the point-to-point read command and sleep command. A collection round for the standard consists of a collection command and response, a read command and response, and sleep command. On the other hand, in the proposed algorithm, a collection round consists of a collection command and response. The simulation results showed that the proposed algorithm can improve the identification delay about 16% compared with the standard when the number of tags are 300.

Light Collection Efficiency of Large-volume Plastic Scintillator for Radiation Portal Monitor (방사선 포털 모니터용 대용적 플라스틱 섬광체 내부 빛 수집 효율 평가)

  • Lee, Jin Hyung;Kim, Jong Bum
    • Journal of Radiation Industry
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    • v.11 no.3
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    • pp.157-165
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    • 2017
  • In this paper, we calculate the light photons collection efficiency of large-volume plastic scintillation detector mainly used for radiation portal monitor (RPM). A Monte Carlo light photon transport code, DETECT2000, were used to quantitatively evaluate light collection efficiency of plastic scintillation detector. DETECT2000 calculated the placement of light collection efficiency based on the energy spectrum. We calculated the light collection efficiency relative to the position of the energy spectrum that proportional to the placement of the source. The $850{\times}285{\times}65mm^3$ size of polyvinyl toluene (PVT) scintillator was used for measurements. Through DETECT2000 simulation, the light collection efficiency of $5{\times}5$ arrays were calculated and verification was performed by comparing with experimentally measured. And then, the corrected MCNP simulation by applying the light collection efficiency in $21{\times}13$ arrays was compared and analyzed. Comparing the Monte Carlo simulation with measured results, it shows an average difference of 10.1% in $5{\times}5$ arrays. Particularly, about twice of the difference was found in the edge of first column, which coupled with PMT. In whole $5{\times}5$ array, the overall ratio was the same except for the first column. And then comparing the energy spectra of the $21{\times}13$ array with and without the light collection efficiency, it shows a difference of 6.69% in Compton edge area. The DETECT2000 based light collection efficiency simulation showed well agreement with the point source experiment. And comparing with measured energy spectra, we could compare the differences according to whether or not the light collection efficiency was applied. As a results, it is possible to increase the accuracy and reliability of Monte Carlo simulation results by pre-calculating the light collection efficiency according to the PVT geometry by using the DETECT2000.

A Study on Collection Development Policy and Guideline Establishment in the Korean University Library (한국 대학도서관의 장서개발정책과 지침작성에 관한 연구)

  • Ryu In-Seok
    • Journal of the Korean Society for Library and Information Science
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    • v.22
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    • pp.109-141
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    • 1992
  • University library must have a substantial collection development policy, by which the short and long term plannings are set up to meet the goals of university education and to support university function. Only when university library organizes collection building based on the well-planned policy, can it establish the systematic collection building, which can satisfy users, support continuity of work, use budget efficiently, and solve the space problem by with-drawing the materials. But most Korean university libraries, contrary to many foreign cases, don't have proper systematic collection development policy or guideline that controls overall library work from planning the collection of materials to evaluating and preserving them. Questionaire on whether university library has collection development policy or guideline was answered positively by only 6 cases out of 57 cases, which is just 10.5 percent. Even in cases that they have a guideline, the content of the copied guideline they sent was confined to acquisition, which is just a part of collection development. Collection development is a statement needed to set up long and short term plannings in consideration of the aims of the library and the needs of users and to shape and manage the library collection systematically. With the above conception and definition, we try to make a proper collection development policy and guideline for the Korean university libraries. Here we must define the object of the university. Object of university is to have good curriculum, good courses, research activities on the part of the faculty, enlargement of graduate school, and establishment of various institutes, etc. And in guideline, selector, method of selection, level of selection and arrangement of budget, etc. must be described concretely in its contents. Since collection development policy and guideline of Korean university libraries should concern their situation, we must confer with the result of the survey and analysis on the matter of collection determination. Here the contents include the priority of materials to be collected, method of collecting materials, arrangement of budget, and others. The purpose of this study is to develop a tenative collection development guideline in reference to the Jeonju University Library by means of analyzing the guiding principle, contents of the guideline, and present conditions of the Korean university libraries. The systematic collection development based on the Guideline for Collection Development of the Korean University Library, can offer a satisfactory service to the users of the university community, and also contribute to the development of the university itself as well as the university library.

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Characteristics of particulate matter collection efficiency and ozone emission rate of an electrostatic precipitator by thickness of high-voltage electrode and distance of collection plates (고전압 전극 두께와 집진판 간격에 따른 전기집진기의 미세먼지 집진효율 및 오존발생 특성)

  • Lee, Jae-In;Woo, Sang-Hee;Kim, Jong Bum;Lee, Seung-Bok;Bae, Gwi-Nam
    • Particle and aerosol research
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    • v.14 no.4
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    • pp.171-180
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    • 2018
  • To optimize the shape of the electrostatic precipitator for the removal of particulate matter in subway environments, the wind-tunnel experiments were carried out to characterize collection efficiency and ozone emission rate. As a standardized parameter, power consumption divided by the square of flow velocity, was increased, the $PM_{10}$ collection efficiency increased. If the standardized parameter is higher than 1.0 due to high power consumption or low flow velocity, increase in thickness of electrodes from 1 to 2 mm, or increase in distance of collection plates from 5 to 10 cm did not change the $PM_{10}$ collection efficiency much. Increase in thickness of high-voltage electrodes, however, can cause decrease in $PM_{10}$ collection efficiency by 28% for low power consumption and high flow velocity. The ozone emission rate decreased as distance of collection plates became wider, because the ozone emission rate per unit channel was constant, and the number of collection channels decreased as the distance of collection plates increased. When the distance of collection plates was narrow, the ozone emission rate increased with the increase of the thickness of electrodes, but the difference was negligible when the distance of collection plates was wide. It was found that the electrostatic precipitator having a thin high-voltage electrodes and a narrow distance of collection plates is advantageous. However, to increase the thickness of high-voltage electrodes, or to increase the distance of collection plates is needed, it is necessary to increase the applied voltage or reduce the flow rate to compensate reduction of the collection efficiency.

A Study on the Construction of Contents for Collection Management Web Sites of University Libraries (대학도서관 장서관리 웹사이트 컨텐츠구성에 관한 연구)

  • Yoon, Hye-Young
    • Journal of the Korean Society for Library and Information Science
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    • v.36 no.1
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    • pp.165-186
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    • 2002
  • The collection management paradigm has drastically changed since the emergence of collection management activities on the internet. Due to the technological development of web, web has become the newly open field as a useful tool to facilitate collection management transactions. The purpose of this study is, by evaluating web sites of the university library’s collection management in United States, to construct the contents of collection management web site. To fulfill the purpose, 6 categories for the contents of the collection management web site are suggested. The result of this study can be used as the basic data for researching of collection management web site. Web site is playing a role of stepping up its activities and informing useful information on its selection tool and collection development policy.

A Study for risk management on Documentary Collection(D/P, D/A) Payment (추심결제(D/P, D/A)방식에서의 위험관리에 관한 연구)

  • Kwak, Su-Young
    • International Commerce and Information Review
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    • v.10 no.2
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    • pp.283-304
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    • 2008
  • According to globalization and localization of world economics international trade payment method was also changed. A traditional payment was Letter of Credit basis, however it is being increased to various methods such as remittance, documentary collection(D/P, D/A) and open account. In order to acquire a secure export payment, exporters prefer to L/C basis which is guaranteed by a reliable bank. However, the L/C should bear a security so that importers would rather documentary collection than L/C. The reasons for the preference of collection payment rather than L/C are a low commission cost, the conversion of buyer's market from seller's market due to severe competition in the world market, transaction increase between main office and branches and a right to control the goods until executing the payment by exporters. Besides of them, collection payment can handle safer and faster than open account basis. However, the collection payment has a risk which it isn't guaranteed by bank for the payment so that I would suggest countermeasures to minimize the payment risk utilizing the collection basis as follows; using export credit insurance system, a large domestic credit report provider such as D&B for absolutely fresh and new information, a collection proxy service for overseas deferred credit and suggestion specifying to order B/L not straight one on consignee in order to transfer the right of ownership with endorsement without problem.

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De-colonialism and the Collection Study - Research on Bias of Library Collection with Reference to History of Social Thoughts (탈식민주의 글쓰기와 장서 연구 -도서관 장서의 편향성에 관한 사회사상사적 접근)

  • Kim Young-Gi
    • Journal of Korean Library and Information Science Society
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    • v.36 no.1
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    • pp.173-193
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    • 2005
  • The modern society is one of knowledge and information, and the library is one of the important routes through which they are obtained. But the collection in the library, from the onset of its creation and the process of accumulation, could only be bent and biased due to the prejudice and distortion, inevitably acting as an agent that mires the essence of the library as a distribution channel for knowledge and information of modern society. This study is the discussion about the necessity, main assignment and the methodology of library collection study. The collection study needs to focus on the process of accumulating the collection in the library to track down the Process of becoming biased.

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An Exploratory Study on Collection Evaluation Indicators for the Collection Development Policy in Public Libraries (공공도서관의 장서개발정책 수립을 위한 장서평가 지표에 관한 탐색적 연구)

  • Oh, Ji-Eun;Jeong, Dong Youl
    • Journal of the Korean Society for information Management
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    • v.32 no.1
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    • pp.43-62
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    • 2015
  • This study was implemented to suggest various indicators of collection evaluation for collection development policy in public libraries. For the sake of the exploratory research, this study tried to show the usability of indicators of collection evaluation through actual data of a case study. Also to analyze indicators of collection evaluation, this study used the ten years circulation records of the Gwangjin District Public Library in Seoul. Majors indicators of collection evaluation were the rate of use and use factor of purchasing books by annual, the rate of use and use factor of librarian's recommended books by annual, the rate of non circulating books by annual, and the rate of use by residence annually.