• Title/Summary/Keyword: collection

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A Comparative Study of Waste Collection Technologies (생활폐기물 수거 방법의 비교 연구)

  • Jung, Young Hoon;Suh, Sang-Ho;Kim, Hyoung-Ho
    • The KSFM Journal of Fluid Machinery
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    • v.16 no.3
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    • pp.48-53
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    • 2013
  • Due to the urbanization, lots of people are living in cities. It is very convenient to live in the cities for the people but at the same time, the highly populated city has several environmental problems. During delivery process of large amount of municipal waste generated from the cities, the automobile emission and traffic jam have been occurred. The waste collection in the cities has been mainly done by using labour force and delivery truck. This is the conventional waste collection up to now. Recently, new technologies like automated waste collection system and capsule transportation have been introduced. Conventional waste collection mainly relied on the labour force and truck delivery does not need to invest a lot of money for the start-up. However, it requires to pay the operational cost both for the labour force and the truck delivery. On the contrary to this conventional waste collection, the automated waste collection and capsule transportation require high initial investment cost. However, the automated waste collection and capsule transportation can reduce significantly the pollutants emission, traffic jam by the waste trucks and actual waste collection cost per ton. In dealing with the waste collection in the cities, new waste collection technologies could be properly combined with the conventional waste collection for the effective municipal waste treatment.

Simplified Tag Identification Algorithm by Modifying Tag Collection Command in Active RFID System

  • Lim, Intaek
    • Journal of Multimedia Information System
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    • v.7 no.2
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    • pp.137-140
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    • 2020
  • In this paper, we propose a simplified tag collection algorithm to improve the performance of ISO / IEC 18000-7, the standard of active RFID systems. In the proposed algorithm, the collection command is modified to include the result of the listening period response from the previous round. The tag, which has received the collection command, checks whether the slot to which it has responded is collided, transmits additional data to its data slot without a point-to-point read command and sleep command, and transitions to the sleep mode. The collection round in the standard consists of a series of collection commands, collection responses, read commands, read responses, and sleep commands. On the other hand, in the proposed tag collection algorithm, one collection round consists only of a collection command and a collection response. As a result of performance analysis, it can be seen that the proposed technique shows superior performance compared to the standard.

A Comparison of Collection Concentrations Based on Airborne Toluene Diisocyanates Measurement Methods (공기 중 Toluene diisocyanates 측정방법에 따른 포집농도 비교)

  • Park, Hyung-Sung;Won, Jong-Uk;Kim, Chi-Nyon;Roh, Jaehoon
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.23 no.4
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    • pp.341-347
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    • 2013
  • Objectives: The aim of this study is to investigate the differences in airborne TDI concentrations based on the filter collection method and liquid collection method and to compare airborne TDIs concentrations by sampling method change when using the filter collection method in the spray-painting process. Methods: For the sample measurement, the filter collection method(OSHA#42) and liquid collection method(NIOSH#5522) were used; for the sampling method, the full-period single sampling and full-period consecutive sampling methods were used. The samples were collected in spray-painting and drying process locations. Results: In all samples collected from the spray-painting and drying process locations through the filter collection and liquid collection methods, greater amounts of 2,6-TDI than 2,4-TDI were detected. When the TDI collection concentrations based on the sampling methods were compared, the concentrations of 2,4-TDI and 2,6-TDI collected by the consecutive sampling method were higher than the concentrations of 2,4-TDI and 2,6-TDI collected by the single sampling method for both the filter collection method and liquid collection method used in the spray-painting process. These differences were statistically significant. Conclusions: When TDI collection concentrations based on the sample measurement methods were compared, the concentration of 2,4-TDI and 2,6-TDI collected through the liquid collection method were higher than the concentrations of 2,4-TDI and 2,6-TDI collected by the filter collection method, and the differences were statistically significant. In the drying process, no difference was shown in the collection concentrations of 2,4-TDI and 2,6-TDI with the two measurement methods.

A Study on the Collection Policy of Presidential Libraries and Museums in the United States (미국 대통령기록관의 수집정책에 관한 연구)

  • Kang, Min-Jung;Lee, Seung-Hwi
    • The Korean Journal of Archival Studies
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    • no.46
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    • pp.233-286
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    • 2015
  • A Collection Policy provides a direction to an archive, but also provides a foundation for developing practical measures of planning and collecting process. In terms of a Collection Policy, it enables detail collection as regulations or codes cannot be as defined as the level of collection, thus, it allows systematic and strategic approaches in collecting former presidents' records. In the case of United States, where the same presidential system exists as South Korea, although the individual Presidential Libraries and Museums have different periods of collections, the Collection Policy was implement a half century ago that is used as a foundation data for record collection. However, the Presidential Archives in South Korea do not have a Collection Policy implemented that the collection is based on 'collection regulations' and 'collection plans.' In the comparison of the Collection Policy at the Presidential Libraries and Museums in the United States and the "collection regulation" and "collection plan" at the Presidential Archives in South Korea, it shows that while the Presidential Libraries and Museums' Collection Policy applies the characteristics of individual presidents that the collection comprises the records from more than the appointed period that it includes various personal records of relating figures, events, regions, and even personal interest; the records are written in detail to the detailed scale and procedure. On the other hand, the Presidential Archives in South Korea, the records collected based on 'collection regulations' and 'collection plans' do not sufficiently apply the individual features of the former presidents that the collections remain as general and unclear. This is due to the absence of a Collection Policy that systemizes and sustains professionalism and consistency of collection plans and procedures. Hence, this study is conducted to propose collection policy implementation measures by analyzing the Collection Policy of the Presidential Libraries and Museums in the United States and identifying implications for applying individual president characteristics.

A Study on the Collection Policy of Universtiy Archives: A Case Study of Hanshin Universtiy (대학기록물 수집정책에 관한 연구: 한신대학교를 중심으로)

  • Jang, Yun-Hee
    • Journal of Korean Society of Archives and Records Management
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    • v.5 no.1
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    • pp.23-46
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    • 2005
  • This study examines the collection policy of University Archives. The establishment of collection policy enables university archives to concentrate in which memories of university to remain and provide as archives. Accordingly, this study, making a model of university archives in early sage of establishment, intends to investigate the collection policy for collecting archives in university. The first chapter defines the fields and categories of collection of archives. In order to define the collection categories, it outlines the history of the university and set up the fields and categories for documentation. In the second chapter, this study examines about the factors which forms the document of the collection policy, such as a missions statement, a guide to collection, and a guide to acceptance by items. Then, this study, applying items mentioned above, suggests a plan for a collection policy. The model presented in this study may not represent the model of collection policy in the university archives. However, it is meaningful as a study of collection policy and has purpose and significance in making a stepping stone for more developmental collection policy.

A Study on the Establishment of Collection Development Policies at Libraries of Theological Universities (신학대학도서관의 장서개발정책 수립에 관한 연구)

  • Jeong, Eun-Ju;Kwak, Chul-Wan
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.26 no.1
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    • pp.101-134
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    • 2015
  • The purpose of this study is to propose established factors and a model of collection development policies for the libraries of theological universities in Korea. To achieve purpose of the study, we analyzed of elements and details of collection development policies at libraries of theological universities in overseas. The study then conducted a survey to understand the current status of collection development policies at libraries of theological universities in Korea. Based on the above results, reflecting both the external and the internal factors, the investigator presented a model of collection development policies by identifying seven elements that should be included when developing the policy: prefaces, collection selection, collection gathering, budget, collection maintenance, mutual cooperation and intellectual freedom, and revision of collection development policies.

Developing a Basic Framework for the Korean National Collection Policy (국가장서개발정책 기본모형 연구)

  • Chang, Hye-Rhan;Hong, Hyun-Jin;Noh, Young-Hee;Oh, Eui-Kyung
    • Journal of the Korean Society for Library and Information Science
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    • v.43 no.4
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    • pp.193-215
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    • 2009
  • A more sophisticated library collection policy is required due to the changing information environment. Both traditional resources and diversified networked information resources are increasing continuously. The National Library of Korea should construct a systematic collection development policy in order to fulfill its mission. The purpose of this study is to develop a basic framework that is intended to improve the coverage of national collection. Examining previous studies and the national collection development policies of major advanced countries, a model consisting of four sub-models has been proposed. It includes hybrid collection, cooperative linking collection, collection evaluation, and a collection policy statement. Details of the sub-models and strategies are described.

Analysis and Assessment of Refuse Collection Polity (쓰레기 종량제 정책의 분석과 평가)

  • 이상락;신두만
    • Journal of environmental and Sanitary engineering
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    • v.14 no.3
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    • pp.39-53
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    • 1999
  • This thesis is to analyze and assess a new refuse collection system that was based on the term of discharge based quantity and collection of refuse from the beginning on January 1, 1995.In the case study for the refuse collection policy of metropolitan Taegu city based on the year of operation, ie, before 1994, after 1995 and as of 1998, the refuse collection policy analyzed from current position and actual condition. The results of analysis as follows. In case of discharged refuse quantity was show 20.4% reduction than the operation was begun and more 5.8% reduction as of 1998.Under the operation of the refuse collection system, therefore, management of refuse and garbage, the reduction of discharged refuse, activation of refuse collection, Recycling and expansion of financial self-reliance increased efficiency of refuse collection system. In the conclusion, more perfect refuse collection system should be developed of implemented in the near future.

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A Study on the Collection Characteristics of a Moving Electrode Electrostatic Precipitator - I. Effect of Collection Plate Velocity - (이동 전극형 전기집진기의 집진특성에 관한 연구 - I. 집진판 이동 속도의 영향-)

  • Kim Yong-Jin;Ha Byung-Kil;Jeong Sang-Hyun;Moon Sang-Cheol;Yoo Joo-Sik
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.16 no.10
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    • pp.901-907
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    • 2004
  • This study investigate the effect of collection plate velocity on the electrical and collection characteristics of a moving electrode electrostatic precipitator (MEEP). Though a high resistivity fly ash is attached at the collecting electrode, the MEEP has very stable characteristics of voltage and corona current. Collection efficiency, corona current, and overall collection efficiency are increased, as the magnitude of the collection plate velocity increases.

Development of a Small Waste Appliance Collection System (소형 폐가전 수거 시스템 개발)

  • Cha, Hyun Chul
    • Journal of Korea Multimedia Society
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    • v.24 no.12
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    • pp.1653-1662
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    • 2021
  • In this paper, we propose a small waste appliance collection system that can be used for efficient waste appliance collection, and implement an unmanned automatic small waste appliance collector system. First, we collected cases related to the collection of waste home appliances, compared and analyzed methods, and arranged the characteristics. We analyzed at the requirements for the collection and management system of waste appliances by dividing it into the aspect of the discharger and the recycling business company. The collection system consists of a client-server structure, which is a collector system and a collection management server. The unmanned automatic collector system is divided into a control unit and a machine/mechanical unit. We identified the functions that the collector system must perform and the hardware required to perform these functions. Based on this, the collector system was implemented as an embedded system. The hardware and software used in the implementation are described and the implementation results are described. The collection system developed in this paper will contribute to the development of urban mining industry by enabling the efficient collection of waste appliances.