• Title, Summary, Keyword: TRS

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Design of the digital TRS network for for the Distribution Automation System (디지털 TRS를 이용한 배전자동화통신망 구축 방안)

  • Kim, Tae-Gyeong
    • Proceedings of the KIEE Conference
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    • pp.420_421
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    • 2009
  • The digital TRS(Trunked Radio System) is an excellent alternative for the transmission medium for the DAS(Distribution Automation System). KEPCO(Korea Electric Power Corporation) made the power IT network with digital TRS system. The main function of the radio network is transmitting and receiving information for the DAS. KEPCO's digital TRS is based on TETRA standard. The digital TRS supports data communication for the electric power control and monitoring systems in various ways.

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Direct Calculation of TRS-398 Quality Correction Factors for High Energy Photons (고에너지 광자선에 대한 TRS-398 선질보정인자의 직접 계산)

  • Shin Kyo-Chul;Oh Young-Kee;Kim Jeung-Kee;Kim Jhin-Kee;Kim Ki-Hwan;Jeong Dong-Hyeok
    • Progress in Medical Physics
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    • v.17 no.1
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    • pp.54-60
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    • 2006
  • In order to apply the TRS-398 dosimetry protocol developed by IAEA we directly calculated the quality correction factors for high energy photons. The calculations were peformed for seven commercial cylindrical chambers (A12, IC70, N23333, N30001, N30006, NE2571, PR06C/G). In comparison with quality correction factors given by TRS-398 our results were in good agreement within ${\pm}0.3%$ (maximum ${\pm}0.3%$) for all chambers and photon qualities.

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The Prospect of 'Recordkeeping Regime' in the Public Sector of Korea : Examination on the characteristics of the Tables of Transactions for Records Scheduling by PRA Act (한국 공공분야 '기록보유(Recordkeeping)'체제 전망 -'기록물분류기준표'의 제도적 의의와 특성 -)

  • Lee, Seung-Eok
    • The Korean Journal of Archival Studies
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    • no.4
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    • pp.31-62
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    • 2001
  • In this paper, I examined specific characteristics of the Tables of Transactions for Records Scheduling(TRS) (記錄物分類基準表 ; Kirokmul-Bulyukijun - Pyo) system by Public Records and Archives Act(PRA Act, No. 5709, 1999). All staffs and employees in governmental agencies of Korea must register, classify and dispose of their official records according to TRS by the Presidential Regulation for the application of PRA Act(No. 17050, 2000). Namely, the criteria of TRS is applicable to all stages of records lifecycle from creation to disposition(transfer to Archives or legal destruction). In the theoretical and methodological area, therefore, it is absolutely important that records managers and archival professionals in Korea make analysis on functions and characteristics of TRS by PRA Act. In the first, my examination take notice of possibility of 'adequate and proper documentation' about activity of the executive organization in TRS system. Other attention is that records management according to TRS means managing of records not only as physical entities but as logical entities which imply content and context of creation and use. In other hand, I wish to account for reasonable separation consideration for continuing utility of archives from current use of records throughout agencies duration Another theme of discussion in this paper is the theoretical framework which give account of TRS's characters. In conclusion, accountability for characteristics of TRS system could have been found in counterproposal view including the concept of Records continuum and the notion of Recordkeeping regime in Australia based on rethinking about Records lifecycle model. In the extent of practical area, more or less, it is imbalanced method that compare TRS by PRA Act to Recordkeeping regime based on Records continuum. Nevertheless, the concept and notion is suitable framework that give account of the prospect of recordkeeping system under PRA Act.as well as the meaningful characteristic of TRS.

Gateway Platform for Connecting D-TRS in Electric Power IT (전력 IT용 D-TRS 접속을 위한 게이트웨이 플랫폼)

  • Song, Byung-Kwen;Jeong, Tae-Eui
    • Journal of the Korean Society for Railway
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    • v.12 no.1
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    • pp.45-54
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    • 2009
  • TETRA(Terrestrial Trunked Radio) is the standard of D-TRS(Digital Trunked Radio System) developed by the ETSI(European Telecommunications Standards Institute). Currently, TETRA has been selected as Electric Power IT Wireless Backbone Network. Traditional distribution automation system has used the wireless network of Mobile Service Provider using CDMA(Code-Division Multiple Access) and WCDMA(Wideband CDMA) modem. Therefore, the development of gateway platform is indispensable according to the change to TETRA network. In this paper, we propose an embedded Linux-based Gateway platform for transmitting Industrial Electric Power IT protocol using TETRA network.

Application of IAEA TRS-398 Protocol to Gamma Knife Model C (감마나이프 C모델에 대한 IAEA TRS-398 프로토콜의 적용)

  • Chung, Hyun-Tai
    • Progress in Medical Physics
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    • v.18 no.4
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    • pp.194-201
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    • 2007
  • Although Gamma Knife irradiates much more radiation in a single session than conventional radiotherapy, there were only a few studies to measure absolute dose of a Gamma Knife. Especially, there is no report of application of International Atomic Energy Agency (IAEA) TRS-398 which requires to use a water phantom in radiation measurement to Gamma Knife. In this article, the authors reported results of the experiments to measure the absorbed dose to water of a Gamma Knife Model C using the IAEA TRS-398 protocol. The absorbed dose to water of a Gamma Knife model C was measured using a water phantom under conditions as close as possible to the IAEA TRS-398 protocol. The obtained results were compared with values measured using the plastic phantom provided by the Gamma Knife manufacturer. Two Capintec PR-05P mini-chambers and a PTW UNIDOS electrometer were used in measurements. The absorbed dose to water of a Gamma Knife model C inside the water phantom was 1.38% larger than that of the plastic phantom. The current protocol provided by the manufacturer has an intrinsic error stems from the fact that a plastic phantom is used instead of a water phantom. In conclusion, it is not possible to fully apply IAEA TRS-398 to measurement of absorbed dose of a Gamma Knife. Instead, it can be a practical choice to build a new protocol for Gamma Knife or to provide a conversion factor from a water phantom to the plastic phantom. The conversion factor can be obtained in one or two standard laboratories.

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A Efficient Key Distribution Scheme for Individual/Group Communication on TRS (TRS 상의 개별/그룹 통신을 위한 효율적인 키 분배 기법)

  • Lee, Deok-Gyu;Park, Yong-Suk;Ahn, Jong-Chul;Lee, Im-Yeong
    • The KIPS Transactions:PartC
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    • v.13C no.7
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    • pp.913-922
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    • 2006
  • It used exclusively the radio communication where is the TRS(Trunked Radio Service) at frequency where the person whom it does is specific with hitherto radio communication method differently frequency of the decimal which is allocated to the relay station it talks the at the room which the multiple user uses with commonness. The TRS system the most big feature is the region multiple group and order communication method. The TRS the composition of system is composed of the multi mind group, the each group is composed of the terminal of the users who have the objective which is similar relates in business contents. With above it follows in same multi objective and the connection of the form which is various or group communication accomplishes and quality case, a possibility a or of having many problem point in key distribution for a large scale communication there is it could be exposed to attack of the form which is various. There is a place where it accomplishes the communication which is safe at the TRS from research which it sees it investigates group key distribution method which is an essential element. The method which it sees when it reduces a communication frequency, it stands but is the user, it proposes the efficient group key distribution method it will be able to accomplish.

Determination of TRS-398 Quality Factors for Cs-137 Gamma Rays in Reference Dosimetry (Cs-137 감마선의 선량측정을 위한 TRS-398 선질인자 결정에 관한 연구)

  • Kang, Sang Koo;Rhee, Dong Joo;Kang, Yeong Rok;Kim, Jeung Kee;Jeong, Dong Hyeok
    • Progress in Medical Physics
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    • v.25 no.3
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    • pp.123-127
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    • 2014
  • The Cs-137 irradiator is widely used to irradiate biological samples for radiobiological research. To obtain the accurate outcomes, correct measurements of the delivered absorbed dose to a sample is important. The IAEA protocols such as TRS-277 and TRS-398 were recommended for the Cs-137 reference dosimetry. However in TRS-398 protocol, currently known as the most practical dosimetry protocol, the quality factor ($k_{Q,Q_0}$) for Cs-137 gamma rays is not suggested. Therefore, the use of TRS-398 protocol is currently unavailable for the Cs-137 dosimetry directly. The calculation method previously introduced for high energy photon beams in radiotherapy was used for deriving the Cs-137 beam qualities ($k_{Q,Q_0}$) for the 15 commercially available farmer type ionization chambers in this study. In conclusion, $k_{Q,Q_0}$ values were ranged from 0.998 to 1.002 for Cs-137 gamma rays. These results can be used as the reference and dosimeter calibrations for Cs-137 gamma rays in the future radiobiological researches.

A Study on the Petal Micromorphological Characteristics of the Tribe Sorbarieae (Rosaceae) (쉬땅나무족(장미과) 화판표피의 미세형태학적 특성에 관한 연구)

  • Song, Jun-Ho;Hong, Suk-Pyo
    • Korean Journal of Plant Resources
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    • v.29 no.4
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    • pp.376-384
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    • 2016
  • A comparative petal micromorphology of 15 taxa of tribe Sorbarieae was carried out using scanning electron microscopy (SEM) in order to evaluate their taxonomic and systematic implication. The characteristics of both adaxial and abaxial side of petal epidermal cells such as shape, arrangement, anticlinal wall and cuticular sculpture were described in detail. The Sorbarieae petal epidermal cells were identified as papillate or conical papillate (PCS) and rectangular-rugose tabular (TRS). Three types of petal micromorphology were found within the tribe based on the cell patterns of adaxial and abaxial side. Type I. PCS-TRS, Type II. PCS-PCS, Type III. TRS-TRS (adaxial-abaxial side). The petal epidermal cell types, anticlinal cell wall, and cuticular sculpture represent not only taxonomical importance for identification between or within the genera but also systematic implication. Moreover, this study provides a relation between petal epidermal cell pattern and insect pollinator (entomophily; melittophily) as an additional case.

Channel Capacity Design in TRS Network (TRS 기반 무선망 용량 설계)

  • Lee, Jin-Kee;Sung, Kee-Hyuk;Park, Myung-Hye;Jung, Young-Ho;Yoo, Dong-Hee;Jung, Kang-Sik;Kim, Mi-Young;Park, Seng-Kyun;Kim, Hong-Ic
    • Proceedings of the KIEE Conference
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    • pp.2624-2626
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    • 2003
  • TRS 무선망은 셀룰라 시스템과 동일한 네트워크 교환 기술로서 다수의 기지국으로 배치된 광역의 서비스 시스템에 의해 그 내에서는 어디를 가더라도 교신이 가능하도록 되어 있다. TRS 시스템 설계에서 고려해야 하는 우선사항은 용량에 관한 설계이다. 예상된 가입자로부터 지역별 통화량을 조사와 가입자당 통화량을 조사한 후, 각 세부 구역별 통화량 값을 구한 다음 가용 주파수 대역과 가입자당 수용 가입자의 값으로부터 FA당 통화 용량 및 기지국 유형별 가입자 수용용량을 계산한다. 더불어 통화품질 수준을 고려하는 엔지니어링이 필요하게 된다. 본 논문은 TRS 무선망에서의 용량설계 연구내용의 일부로, 최종적인 채널용량을 산정함으로써 최종적 목표인 기지국 수/유형/용량을 결정하는 것을 목표로 한다.

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