• 방사선산업학회지
• /
• 제2권1호
• /
• pp.43-51
• /
• 2008

방사선처리기술은 현재 멸균, 폴리머가교, 식품조사, 생고무가황 등 산업적으로 많은 곳에서 이용되고 있다. 현재 감마선과 전자선을 이용한 것은 방사선처리기술의 대표적인 기술이다. 이 논문의 목적은 최근의 방사선 기술을 이해하기 위해 외국의 방사선기술 동향을 살펴보고 산업현장 작업자가 방사선 관련 기술이 친숙해지기를 목적으로 그들에게 유용한 정보를 제공하기 위함이다. 본 조사를 통해 방사선이용기술이 지속적으로 성장함을 알 수 있었고, 또한 이 기술을 이용하면 제품의 다양성을 줄 수 있다는 사실도 알아냈다.

• 전기학회논문지
• /
• 제56권11호
• /
• pp.1903-1909
• /
• 2007

As the electric power industry has been revolutionarily transformed such that the distributed energy resources have been interconnected with power systems and a variety of energy service providers have been appeared, the need of Consumer Energy Portal as a core of two-way communication and service infrastructure between power suppliers and consumers has been gradually increased. Consumer Energy Portal can be thought of as a combination of hardware and software enabling two-way communication between energy service providers and equipment within the consumers' premises or a physical and logical link between consumers' in-building networks and wide-area access networks. In other words, Consumer Energy Portal can make the way the power industry has been traditionally operated the web-based way, enabling two-way interactions between energy service providers and consumers and mutual networking between end users' equipment. Thus, Consumer Energy Portal can be a kind of Service portal that provides new value-added services and efficient power operations that in the past. In this paper, for ESPs' integrated resources management, demand side management and value-added service provision, we have established the two-way access network that can gather real-time metering data using ZigBee technology and control physically networked equipment.

• 방사선산업학회지
• /
• 제8권1호
• /
• pp.49-52
• /
• 2014

Kenaf fibers have excellent properties and possess the potential to be outstanding reinforcing fillers in cement. The grafting of poly(ethylene glycol) methacrylate (PEGMA) to the kenaf fibers is important in improving the compatibility between the fibers and the cement. PEGMA was grafted onto kenaf fibers using gamma-ray radiation. The radiation dose ranged from 20 to 60 kGy, and the dose rate was $10kGy\;h^{-1}$. The degree of grafting increased with increased radiation doses. FT-IR analysis revealed an increase in PEGMA content after gamma-ray radiation induced grafting, further evincing the attachment of PEGMA to the kenaf fibers. The mechanical properties of the gamma-ray grafted kenaf fiber/cement composites were superior to those of the ungrafted kenaf fiber/cement specimens.

• 주류산업
• /
• 제19권2호
• /
• pp.19-38
• /
• 1999

• 자원ㆍ환경경제연구
• /
• 제20권2호
• /
• pp.291-308
• /
• 2011

정부의 '저탄소 녹색성장' 정책기조의 실현가능성 여부는 에너지절약 자본시설에 투자할 경우 과연 산업의 생산성 증가로 이어질 수 있는지 여부에 달려 있다. 본 논문에서는 1차 금속산업을 대상으로 쌍대 비용함수로부터 총 요소생산성을 정의하고 산업생산성 증가의 요인별 분석을 통하여 에너지효율화 투자의 생산성 증가 파급효과를 측정하였다. 1982년~2006년 기간 동안 에너지효율화 투자로 인하여 평균적으로 연간 생산성은 1.16% 포인트 증가한 것으로 추정되었다. 또한 규모경제효과는 에너지효율화 투자의 생산성 증가 기여도를 향상시키는 것으로 나타났다.

• 디지털산업정보학회논문지
• /
• 제16권1호
• /
• pp.33-39
• /
• 2020

A smart grid is a next-generation power grid that can improve energy efficiency by applying information and communication technology to the general power grid. The smart grid makes it possible to exchange information about electricity production and consumption between electricity providers and consumers in real-time. Advanced metering infrastructure (AMI) is the core technology of the smart grid. The AMI provides two-way communication by installing a modem in an existing digital meter and typically include smart meters, data collection units, and meter data management systems. Because the AMI requires data collection units to control multiple smart meters, it is essential to ensure network availability under heavy network loads. If the load on the work done by the data collection unit is high, it is necessary to allocation new data collection units to ensure availability and improve energy efficiency. In this paper, we discuss the allocation scheme of data collection units for the energy efficiency of the AMI.

• 디지털산업정보학회논문지
• /
• 제15권2호
• /
• pp.11-17
• /
• 2019

As interest in the efficiency use of energy has been recently rising, studies have been performed in utilizing various types of eco-friendly green energy and natural energy. Especially there has been rapidly increase in the fields using ESS (Energy Storage System), which is the technology for storing the energy from nature. The application fields of ESS is continuously growing and expanding to various types of technologies. However, in recent years there have been continuing problems with the safety of ESS. And related researches are going on. In this paper, we has proposed a system structure to utilize more secure ESS and has monitored the system status of ESS in real time by using smart phone app. This paper has also proposed a new method to configure secure ESS by implementing GUI (Graphical User Interface) to control the system. And then explain experimental results to investigate the efficiency of the proposed ESS.

• 한국수소및신에너지학회논문집
• /
• 제33권4호
• /
• pp.301-308
• /
• 2022

The Hydrogen Economy Promotion and Hydrogen Safety Management Act (hereinafter referred to as the "Hydrogen Economy Act") stipulates matters related to certification and cancellation of clean hydrogen by grade, and requires those who produce, import, or sell clean hydrogen to report to the Minister of Trade, Industry and Energy. In order for this system to operate smoothly, the clean hydrogen Certification system must be designed to meet international standards, and the institution operating the System must have appropriate capabilities and foundations. The clean hydrogen certification system should serve as an opportunity for Korea's domestic energy industry to take a leap forward.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2010년도 춘계학술대회 논문집
• /
• pp.183-186
• /
• 2010

Advanced Railway countries are developing technologies of production and management for low-carbon and green growth of their railway industry to hold a dominant position under post-Tokyo protocol regime through integrated approach which uses environmental quantitative analysis of train life cycle by using LCA(Life Cycle Assessment). On the contrary, Korea railroad industry attempts to make an environmental improvement only for using regenerative energy and improvement in operating energy consumption through adapting reduction weight of material technology and etc. without systematic environmental analysis approaches such as comparing and analyzing energy consumption as well as GHG emission in each life cycle stages of train. Therefore, In this paper, low-carbon management and comprehensive environmental improvement for sustainable development of Korea railway industry through analyzing the result of life cycle analysis in abroad are suggested.

• 펄프종이기술
• /
• 제31권5호
• /
• pp.73-85
• /
• 1999

Yield and fracture are separated in the tensile failure of paper. Failure in the machine direction of photocopy paper is contrasted with failure in the cross-machine direction . The ratios of distortion (shape change) to dilatation (volume change) for individual elements at yield and fracture are described. The ratios of distortion to dilatation are measured and compared to predicted values of the strain energy density theory. To evaluate the effect of the angle from the principal material direction on the strain energy density theory. To evaluate the effect of the angle from the principal material direction on the strain energy density factor, samples are prepared from machine direction to cross-machine direction in 15 degree intervals. the strain energy density of individual elements are obtained by the integration of stress from finite element analysis with elastic plus plastic strain energy density theory. Poison's ratio and the angle from the principal material direction have a great effect ion the ratio fo distortion to dilatation in paper. During the yield condition, distortion prevails over dilatation . At fracture, dilatation is at a maximum.