• Nuclear Engineering and Technology
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• 제55권12호
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• pp.4628-4636
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• 2023

Cables are indispensable in nuclear power plants for transmitting data measured by various types of detectors, such as self-powered neutron detectors (SPNDs). These cables will generate disturbing signals that must be accurately distinguished and eliminated. Given that the cable current is not very significant, previous research has focused on SPND, with little attention paid to cable evaluation and validation. This paper specifically focuses on the quantitative analysis of cables and proposes a theoretical model to predict cable noise. In this model, the reaction characteristics between irradiated neutrons and cables were discussed thoroughly. Based on the Monte Carlo method, a comprehensive simulation approach of neutron sensitivity was introduced and long-term irradiation experiments in a heavy water reactor (HWR) were designed to verify this model. The theoretical results of this method agree quite well with the experimental measurements, proving that the model is reliable and exhibits excellent accuracy. The experimental data also show that the cable current accounts for approximately 0.2% of the total current at the initial moment, but as the detector gradually depletes, it will contribute more than 2%, making it a non-negligible proportion of the total signal current.

• 한국인터넷방송통신학회논문지
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• 제15권2호
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• pp.263-267
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• 2015

현 지뢰탐지기는 탐지를 실시한 곳과 실시하지 않은 지역을 구분할 수 없고, 많은 인력과 시간이 낭비되는 문제점이 있으며, 사용자가 센서 헤드부를 일정한 속도로 움직이지 않거나, 너무 빨리 움직이는 경우 지뢰를 정확히 탐지하기가 곤란하다. 따라서 단방향 초음파 센싱신호를 통한 지뢰탐지 오류 문제점을 개선하고자, Human Body 안테나부, 메인마이크로프로세서 유닛부, 스마트 안경부, 바디장착형 LCD모니터부, 무선데이터 송수신부, 벨트형 전원공급부, 블랙박스형 카메라부, 보안통신 헤드셋으로 구성하여 전투복을 착용한 상태에서 신체의 머리, 몸통, 팔, 허리, 다리에 탈 부착식으로 장착, Superhigh Frequency RF Beam을 통해 지뢰를 탐지하는 Human Body 안테나부를 적용, 지뢰의 금속 비금속이 아닌, 지상(하)에 매설된 기폭제를 전방위($360^{\circ}$)로 탐지할 수 있고, 지뢰의 거리 위치 형태 재질을 2D 또는 3D 영상으로 스마트 안경 및 신체장착형 LCD모니터부에 실시간 표출시킬 수 있으며, 이로 인해 전투병이 지상(하)에 있는 지뢰를 회피, 신속하게 기동할 수 있다. 아울러 휴대용 배터리와 벨트형 전원공급부의 Twin-Self Supplements of electricity을 통해 별도의 충전 없이 3~7일간 전투를 수행할 수 있으며, 원격지의 전투상황을 원격지 전투지휘서버에서 실시간 모니터링할 수 있고, 전투병 1:1로 전투정보를 공유할 수 있어, 전투현장에 있는 것과 같은 생동감 있게 전투상황을 원격지휘할 수 있는 스마트전투시스템을 구축할 수 있는 Smart Wearable Minefield Detection System을 제안하고자 한다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.362-362
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• 2017

Dissemination of IPB3S rice variety combined with cultivation technology named IPB Prima was aimed to introduce IPB research product particularly for IPB rice variety with high-yield character that is IPB3S. The rice variety IPB3S and IPB Prima cultivation technology was expected to be one of solution to improve rice productivity and accelerate to food self-sufficiency in Indonesia. Research sctivity was consist of three main research unit i.e. (1) Dissemination of IPB3S rice variety and IPB Prima production technology; (2) The development of Information and management web-based system (IMS) for planning and monitoring IPB3S and IPB Prima application distribution; and (3) The development of High-capacity grain drying system in Fluidized-bed drying ang in-store drying system. The objective of main research i.e. to introduce IPB high-yield rice variety, to accelerate rice productivity to support self-sufficiency, to develop integrated system model through fluidized and in-store drying, and to develop web-based management-information system in result analyzing IPB3S and IPB Prima distribution and technology application. The dissemination activities was arranged in two location. The first location was in Banyuwangi, East Java with total area 10.87 ha, consist of 8.91 ha planting area for IPB3S and 1.96 ha planting area for Ciherang. The second location is in Tegal, Middle Java with total planting area in 5 ha. The experiment was arranged in different treatment of varieties and cultivation method. The experiment consist of (1) rice variety Ciherang with conventional cultivation technology (P0); (2) rice variety Ciherang with IPB Prima cultivation technology (P1); (3) rice variety IPB3S with conventional cultivation technology (P2); (4) rice variety IPB3S with IPB Prima cultivation technology (P3). Planting distance for twin rows system is $50cm{\times}25cm{\times}12.5cm$. Planting distance for single row system is $25cm{\times}25cm$. The research result elucidated that productivity result in two location has different grades in similar trend. Experiment in Tegal resulted P0 result is $6.18ton\;ha^{-1}$, P1 result is $6.30ton\;ha^{-1}$, P2 result is $6.82ton\;ha^{-1}$, P3 result is $7.31ton\;ha^{-1}$. Experiment in Banyuwangi resulted optimum production of IPB3S variety productivity number are $7.29ton\;ha^{-1}$, while Ciherang are $6.73ton\;ha^{-1}$.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.61-61
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• 2017

Dissemination of IPB3S rice variety combined with cultivation technology named IPB Prima was aimed to introduce IPB research product particularly for IPB rice variety with high-yield character that is IPB3S. The rice variety IPB3S and IPB Prima cultivation technology was expected to be one of solution to improve rice productivity and accelerate to food self-sufficiency in Indonesia. Research sctivity was consist of three main research unit i.e. (1) Dissemination of IPB3S rice variety and IPB Prima production technology; (2) The development of Information and management web-based system (IMS) for planning and monitoring IPB3S and IPB Prima application distribution; and (3) The development of High-capacity grain drying system in Fluidized-bed drying ang in-store drying system. The objective of main research i.e. to introduce IPB high-yield rice variety, to accelerate rice productivity to support self-sufficiency, to develop integrated system model through fluidized and in-store drying, and to develop web-based management-information system in result analyzing IPB3S and IPB Prima distribution and technology application. The dissemination activities was arranged in two location. The first location was in Banyuwangi, East Java with total area 10.87 ha, consist of 8.91 ha planting area for IPB3S and 1.96 ha planting area for Ciherang. The second location is in Tegal, Middle Java with total planting area in 5 ha. The experiment was arranged in different treatment of varieties and cultivation method. The experiment consist of (1) rice variety Ciherang with conventional cultivation technology (P0); (2) rice variety Ciherang with IPB Prima cultivation technology (P1); (3) rice variety IPB3S with conventional cultivation technology (P2); (4) rice variety IPB3S with IPB Prima cultivation technology (P3). Planting distance for twin rows system is $50cm{\times}25cm{\times}12.5cm$. Planting distance for single row system is $25cm{\times}25{\times}cm$. The research result elucidated that productivity result in two location has different grades in similar trend. Experiment in Tegal resulted P0 result is $6.18ton\;ha^{-1}$, P1 result is $630ton\;ha^{-1}$, P2 result is $6.82ton\;ha^{-1}$, P3 result is $7.31ton\;ha^{-1}$. Experiment in Banyuwangi resulted optimum production of IPB3S variety productivity number are 7.29 ton ha-1, while Ciherang are $6.73ton\;ha^{-1}$.

• 화약ㆍ발파
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• 제33권3호
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• pp.21-28
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• 2015

본 연구의 목적은 연속적 폭굉속도(VOD) 측정시스템을 이용하여 상용 테르밋 반응 혼합제의 연속적인 연소전파거동을 측정하기 위한 방법을 제안하기 위함이다. 두 종류의 상용 VOD 센서(VOD PROBEROD-OS, VOD PROBEROD-HS)와 자체개발한 VOD 센서(VOD PROBEROD-ES)를 기존 연속적 VOD 측정시스템에 적용하여 테르밋 반응과정에서 발생하는 연소전파속도(VOC)를 측정한 결과, 자체 개발한 VOD PROBEROD-ES 센서만 정상적인 연속적 연소전파거동을 보여주었다. 결과적으로, 철재튜브 내 장전된 테르밋 반응 혼합제는 기폭점으로부터 100mm 이내에서 약 200m/s의 연소전파속도를 보였으며, 100mm와 300mm 구간에서 급작스럽게 증가하여 음속의 2배에 가까운 VOC를 나타내었다. 그 이후 서서히 증가하여 최종적으로 800m/s까지 증가하는 경향을 보였다. 이러한 결과는 테르밋 반응 혼합제를 이용하여 정상적인 VOC나 위력을 기대하기 위해서는 철재튜브 등으로 완전히 구속된 상태에 길이 300mm 이상 장전하여야 함을 의미한다.

• 토지주택연구
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• 제8권4호
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• pp.285-294
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• 2017

Recently, as the paradigm of regional development has been transformed into characterization, decentralization and cooperation, small and medium scale development is in the spotlight. In particular, as the transfer of planning authority to local governments accelerates, LH is in the process of seeking to transform itself into a system that is in line with local government demand. The purpose of this study is to elaborate the regional pending projects that meet the demand of the region. The Jeju Special Self-Governing Province is the area where land and housing prices have increased more than three times recently, which is the area of interest in recent years due to the various demand for development projects. Another objective is to establish a local government based on LH's system, it is aimed to derive a collaboration method with local government, province corporation and local researchers. The criteria for deriving the cooperation projects between the local government and LH are basically the ones that can be carried out by LH and future-oriented projects. The process of deriving has undergone the process of statutory planning, unscrupulous plan analysis, and consultation of experts' advisory committees. In order to derive the regional cooperation project, four criteria such as local uniqueness, future possibility, business promotion efficiency, and local cooperation project were set. Major projects of the Jeju Special Self-Governing Province are improvement of the surrounding traffic system, construction of the hinterland due to the construction of the second airport, and establishment of Cruise Port(Jeju Port, Seogwipo Port). The role of each entity in the implementation of regional cooperation projects is as follows. Local government should request subsidies for the projects in case of lack of budget support and secure them through competition with other regions. In addition, it should be responsible for the operation and management of the facility once it has been supported and completed smoothly. The Ministry of Land, Infrastructure and Transport affects each region through approval and subsidy of the development plan. After the development project is completed, it evaluates the development project through monitoring and plays a role of continuously improving the system. As a business operator, the provincial corporation will carry out small-scale projects including non-physical projects such as community participation. In the case of LH regional headquarters, the general manager of the region will establish a comprehensive business plan, secure development availability, and carry out large-scale growth promotion projects.

• Korean Chemical Engineering Research
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• 제40권6호
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• pp.659-663
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• 2002

에틸알코올의 첨가로 과포화가 유도되는 NaF 결정화 과정을 수정진동자를 이용하여 측정하였다. 준안정 상태의 NaF 용액에 에틸알코올을 첨가하면 NaF의 용해도가 감소하여 NaF 과포화가 형성되어 결과적으로 NaF 결정이 생성 및 성장한다. NaF 용액의 과포화에서 결정 생성 및 성장하는 변화를 감지하기 위하여 수정진동자의 금전극 표면을 염산시스테아민(cysteamine hydrochloride; 2-mercaptoethylamine hydrochloride)으로 self-assembly하여 수식하여 응용 가능성을 검토하였다. 과포화 과정을 통해 생성된 NaF 결정이 염산시스테아민 표면 위에 흡착되면 흡착된 양에 비례하여 수정진동자 주파수가 변화하기 때문에 주파수 변화를 측정함으로써 간접적으로 NaF 결정과정을 분석할 수 있었다. 알코올의 주입량을 1-5 ml로 변화시킴으로써 용액 중에 형성되는 NaF의 과포화 농도의 수준을 변화시켜 주었으며, 염산시스테아민 박막에 대한 주파수 변화를 분석함으로써 주입량에 따른 NaF 결정화 정도를 해석할 수 있었다. 이들 결과들을 통하여 수정진동자를 이용한 NaF 결정화 과정의 분석이 가능함을 알 수 있었다.

• Biomolecules & Therapeutics
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• 제25권2호
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• pp.122-129
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• 2017

A diversity of synthetic cathinones has flooded the recreational drug marketplace worldwide. This variety is often a response to legal control actions for one specific compound (e.g. methcathinone) which has resulted in the emergence of closely related replacement. Based on recent trends, the nitrogen atom is one of the sites in the cathinone molecule being explored by designer type modifications. In this study, we designed and synthesized two new synthetic cathinones, (1) ${\alpha}-piperidinopropiophenone$ (PIPP) and (2) ${\alpha}-piperidinopentiothiophenone$ (PIVT), which have piperidine ring substituent on their nitrogen atom. Thereafter, we evaluated whether these two compounds have an abuse potential through the conditioned place preference (CPP) in mice and self-administration (SA) in rats. We also investigated whether the substances can induce locomotor sensitization in mice following 7 days daily injection and challenge. qRT-PCR analyses were conducted to determine their effects on dopamine-related genes in the striatum. PIPP (10 and 30 mg/kg) induced CPP in mice, but not PIVT. However, both synthetic cathinones were not self-administered by the rats and did not induce locomotor sensitization in mice. qRT-PCR analyses showed that PIPP, but not PIVT, reduced dopamine transporter gene expression in the striatum. These data indicate that PIPP, but not PIVT, has rewarding effects, which may be attributed to its ability to affect dopamine transporter gene expression. Altogether, this study suggests that PIPP may have abuse potential. Careful monitoring of this type of cathinone and related drugs are advocated.

• 한국컴퓨터정보학회논문지
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• 제25권4호
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• pp.207-212
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• 2020

본 연구는 서울시에 소재한 일반기업의 사무직 종사자 546명을 대상으로 조직시민행동, 임파워먼트 그리고 직무만족의 관련성에 대해 SPSS 23.0과 AMOS 21.0을 이용하여 실증분석을 시행하였다. 연구결과로는 첫째, 조직시민행동의 임파워먼트 관계에서 참여적 행동이 자기결정력에 정(+)의 영향을 주었고, 임파워먼트 요소인 자기 결정력과 영향력/의미성이 직무만족에 정(+)의 영향을 주었다. 둘째, 조직시민행동과 직무만족의 관계에서는 이타주의가 직무만족에 정(+)의 영향을 주었다. 셋째, 직무만족에 대한 직접효과와 간접효과를 살펴보면, 조직시민행동의 이타주의는 직접효과가 높았고, 참여적 행동은 간접효과의 값이 더 높았다. 반면에 임파워먼트의 요소인 자기결정력과 영향력/의미성은 조직시민행동보다 높은 값을 나타냈다. 따라서 직무만족에 영향을 주는 요소는 임파워먼트가 가장 중요한 요소임을 알 수 있었다. 그러므로 구성원들에게 부여된 임파워먼트의 효과성을 지속적으로 모니터링하고, 교육을 통해 업무 역할에 대한 의미성과 자기결정력을 제고하면 자율성이 높아져 조직의 활성화에 기여할 수 있을 것이다.

• World Technopolis Review
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• 제8권1호
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• pp.59-70
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• 2019

Where is a better place to live? In the coming era, this should be more than simply a livable place. It should be an adaptable place that has a flexible system adaptable to any new situation in terms of diversity. Customization and real-time operation are needed in order to realize this technologically. We expect a smart city to have a flexible system that applies technologies of self-monitoring and self-response, thereby being a promising city model towards being a better place to live. Energy demand and supply is a crucial issue concerning our expectations for the flexible system of a smart city because it is indispensable to comfortable living, especially city living. Although it may seem that energy diversification, such as the energy mix of a country, is a matter of overriding concern, the central point is the scale of place to build grids for realizing sustainable urban energy systems. A traditional hard energy path supported by huge centralized energy systems based on fossil and nuclear fuels on a national scale has already faced difficult problems, particularly in terms of energy flexibility/resilience. On the other hand, an alternative soft energy path consisting of small diversified energy systems based on renewable energy sources on a local scale has limitations regarding stability, variability, and supply potential despite the relatively light economic/technological burden that must be assumed to realize it. As another alternative, we can adopt a holonic path incorporating an alternative soft energy path with a traditional hard energy path complimentarily based on load management. This has a high affinity with the flexible system of a smart city. At a system level, the purpose of all of the paths mentioned above is not energy itself but the service it provides. If the expected energy service is fixed, the conclusive factor in choosing a more appropriate system is accessibility to the energy service. Accessibility refers to reliability and affordability; the former encompasses the level of energy self-sufficiency, and the latter encompasses the extent of energy saving. From this point of view, it seems that the small diversified energy systems of a soft energy path have a clear advantage over the huge centralized energy systems of a hard energy path. However, some insuperable limitations still remain, so it is reasonable to consider both energy systems continuing to coexist in a multiplexing energy system employing a holonic path to create and maintain reliable and affordable access to energy services that cover households'/enterprises' basic energy needs. If this is embodied in a smart city concept, this is nothing else but smart energy inclusion. In Japan, following the Fukushima nuclear accident in 2011, a trend towards small diversified energy systems of a soft energy path intensified in order to realize a nuclear-free society. As a result, the Government of Japan proclaimed in its Fifth Strategic Energy Plan that renewable energy must be the main source of power in Japan by 2050. Accordingly, Sony vowed that all the energy it uses would come from renewable sources by 2040. In this situation, it is expected that smart energy inclusion will be achieved by the Japanese version of a smart grid based on the concept of a minimum cost scheme and demand response.