Gamma-ray spectroscopy, which is an appropriate method to identify and quantify radionuclides, is widely utilized in radiological leakage monitoring of nuclear facilities, assay of radioactive wastes, and decontamination evaluation of post-processing such as decommissioning and remediation. For example, in the post-processing, it is conducted to verify the radioactivity level of the site before and after the work and decide to recycle or dispose the generated waste. For an accurate evaluation of gamma-ray emitting radionuclides, the measurement should be carried out near the region of interest on site, or a sample analysis should be performed in the laboratory. However, the region is inaccessible due to the safety-critical nature of nuclear facilities, and excessive radiation exposure to workers could be caused. In addition, in the case of subjects that may be contaminated inside such as pipe structures generated during decommissioning, surveying is usually done over the outside of them only, so the effectiveness of the result is limited. Thus, there is a need to develop a radiation measurement system that can be available in narrow space and can sense remotely with excellent performance. A liquid light guide (LLG), unlike typical optical fiber, is a light guide which has a liquid core. It has superior light transmissivity than any optical fiber and can be manufactured with a larger diameter. Additionally, it can deliver light with much greater intensity with very low attenuation along the length because there is no packing fraction and it has very high radiation resistant characteristics. Especially, thanks to the good transmissivity in UV-VIS wavelength, the LLG can well transmit the scintillation light signals from scintillators that have relatively short emission wavelengths, such as LaBr3:Ce and CeBr3. In this study, we developed a radiation sensor system based on a LLG for remote gamma-ray spectroscopy. We fabricated a radiation sensor with LaBr3:Ce scintillator and LLG, and acquired energy spectra of Cs-137 and Co-60 remotely. Furthermore, the results of gamma-ray spectroscopy using different lengths of LLG were compared with those obtained without LLG. Energy resolutions were estimated as 7.67%, 4.90%, and 4.81% at 662, 1,173, and 1,332 keV, respectively for 1 m long LLG, which shows similar values of a general NaI(Tl) scintillator. With 3 m long LLG, the energy resolutions were 7.92%, 5.48%, and 5.07% for 662, 1,173, and 1,332 keV gamma-rays, respectively.

In order to remove rust and impurities from surface of raw SUS circular bar, peeling machine is used to make lustrous and clean surface of SUS circular bar. Drawing process system is used to manufacture SUS hexagonal bar. SUS hexagonal bar have been widely used to make hexagonal bolt/nut, adapter and fittings and so on. The purpose of this study is to investigate the stabilities for guide bar of clamp in drawing process system. As the results, the guide bar showed structural stability in cases of below load of 50 Ton and over hook radius of 3.0mm. Further as the thickness of guide bar hooking with jaw was increased, minimum safety factor was decreased.

Since it is impossible to predict earthquakes, they involve more casualties and property damage compared to meteorological disasters such as heavy snow and heat waves, which can be predicted through weather forecasts. This has highlighted the need for seismic design and reinforcement. Recently, the use of composite materials as reinforcement has surged because steel plate reinforcement and section enlargement are likely to result in increased weight and physical damage to structures. This study evaluates the seismic performance of panels created from composite materials, and their guide systems. The specimens were miniature versions of actual steel structures, and displacement loads were applied in the transverse direction. Seismic performance was found to improve when structures were reinforced with seismic panels.

Because earthquakes occur within very little or no warning, they cause significant damage to property and inflict large human casualties. Seismic design and reinforcement has been extensively studied over the years, for the purpose of reducing damage from earthquakes. Composite materials are being widely used as reinforcement because the use of steel plates and section enlargement are time-consuming methods that leave physical damage to structures. This study assessed the guide system performance of FRP panels created from composite materials. Actual steel structures were reproduced in miniature form, and were subjected to transverse displacement loads. The experiments were carried out by applying two types of FRP panel guide systems to the specimens.

Essentially, the university spirit is a kind of steady value, which is condensed from the organizational culture and the humanistic spirit of the university. It originates from the university system, the tangible cultural carrier and the intangible public awareness. Also it is the embody of the compound elements like the abstract and concrete, or the tangible and the intangible of the university. Only by establishing on the rule and order of law, and being followed and defended by the whole society, can the university spirit be built and developed. The University System is a management system which can carry out the unification of rights and responsibilities of the university as a legal entity and running subject. It reflects the governance model, the system standard and the standard of behavior of the relationships between university with government and society. There is no system model of university that can be run forever or shared all around the world. It should not only adapt to its national situation, cultural tradition and historical stage, but also match with certain social conditions and civilization. However, whether as a domestic or foreign university, it may and ought to have some converging university spirit and system.

Government and company are unfolding greenhouse gas reduction activity to prevent the effects of global warming. Also, verification business through greenhouse gas inventory construction is spreaded variously. Greenhouse gas verification proceeds by document examination, risk analysis, field survey. Document investigates emission information, calculation standard, emission report, data management system. And through risk assessment result, establish field verification plan. Through study on risk assessment of greenhouse gas inventory verification, wish to reduce risk of verification.

In relation to a certification system recently, it is coming out complains about make a rule of thumb certification, problems of after-service and duplication with government certifications. Also there is confusion in operating certification system to lac

본 연구는 최근 산업 전반에 걸쳐 도입이 확산되고 있는 RFID(Radio Frequency IDentification)기술과 다채널 음성 전달 서비스 기술을 활용하여, 유비쿼터스 환경에서의 SP(Sales Promotion) 광고를 효과적으로 전달하기 위한 새로운 SP광고용 RFID기반의 다채널 음성 안내시스템을 개발함으로서, 향후 RFID/USN시장을 선점할 수 있는 고부가가치의 신규 미디어 서비스 모델을 제안하고자 한다.

If SAS users can completely avoid programming, it is an additional advantage for using SAS besides its all powerful and efficient features. This demo presentation will attempt to display the technical features of EG that enable us to use SAS without programming. That is, EG is an easy-to-use Windows application that provides 􀁺 Access to much of the functionality of SAS 􀁺 An intuitive, visual, customizable interface 􀁺 Transparent access to data 􀁺 Ready-to-use tasks for analysis and reporting 􀁺 Easy exporting of data and results to other applications 􀁺 Scripting and automation 􀁺 A code editing facility It provides a point-and click environment to much, but not all, of the functionality of SAS. Those features of SAS that are not directly accessible through the point-and click environment can be accessed through the code generation and execution capabilities of EG. As you access data and build tasks, EG generates SAS code behind the scenes. When you finish a task, this code is sent to SAS for processing and the results are returned to EG. You can use the features of EG without knowing how to program in SAS. If you area interested in programming, you can view the code that EG generate

최근 들어 인천대교 등 다수의 사장교가 공용 또는 시공 중에 있으며 이러한 시점에서 국내 사장교의 기술력을 살펴본다면 시공기술은 눈에 띄게 발전하였지만 설계기술은 아직 국외 의존도가 매우 높은 실정이다. 사장교 핵심설계요소들 중 케이블 정착구조는 강력한 케이블 장력의 작용으로 국부적인 응력집중현상이 발생하므로 안전성 확보를 위해서는 반드시 국부상세해석에 의한 설계가 요구된다. 하지만 명확한 설계기준이나 이론적 설계 없이 유한요소해석에만 의존하여 설계하는 실정이며 정착구조의 이론적 기본메커니즘을 이해하지 못한 채 유한요소해석 결과에만 의존, 엔지니어의 판단력이 흐려지는 부작용을 가져오고 있다. 이에 따라 본 연구에서는 케이블 정착구조 가이드 파이프앵커 형식 중 정착강관의 기존 이론적인 설계절차를 나타내고 추가적으로 고려해야 할 사항들을 국내외 설계기준에 따라 정리하고 보완 설계절차를 제시하였다.