• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2000.06a
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• pp.222-226
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• 2000

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.225-226
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• 2010

ISO 22266-1 issued in May 2009 provides guidelines for applying shaft torsional vibration criteria, under normal operating conditions, for the coupled shaft system and long blades of a turbine generator set. In case that a turbine generator vendor do not meet the separation margin of torsional natural frequencies in the technical specifications of the purchaser, this standard can present the reasonable and objective criteria about torsional vibration which both purchaser and supplier can agree on, while ensuring the integrity of turbine generator. This paper describes the application case of ISO 22266-1 for the establishment of torsinal vibration criteria under retrofitting the turbine generator of 'U' nuclear power plant.

• BMB Reports
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• v.42 no.4
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• pp.223-226
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• 2009

We measured the pH-induced spectral changes of yeast iso-1-cytochrome c on silver nanoparticle surfaces using surface-enhanced resonance Raman scattering (SERRS) at 457.9 nm. At a pH of ~3, the Met80 ligand in yeast iso-1-cytochrome c is assumed to dissociate, leading to a marked conformational change as evidenced by the vibrational spectral shifts. The Soret band at ~410 nm in the UV-Vis spectrum shifted to ~396 nm at pH~3, indicating a transition from a low spin state to a high spin state from a weak interaction with a water molecule. Thus, SERRS spectroscopy can measure the pH-induced denaturalization of cyt c adsorbed on metal nanoparticle surfaces at a lower concentration with a better sensitivity than ordinary resonance Raman spectroscopy.

• Nutrition Research and Practice
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• v.2 no.4
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• pp.218-226
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• 2008

The present study evaluated the effects of various dosages of soybean isoflavone extract on lipid profiles, lipid peroxidation and antioxidant activities in streptozotocin-induced diabetic rats. The one normal control group was fed an AIN-76-based experimental diet and four diabetic groups were fed the same diet, supplemented with four different levels of soybean isoflavone extract for seven weeks. The daily dosages of pure isoflavone for four diabetic groups were set to be 0 mg (diabetic control), 0.5 mg (ISO-I), 3.0 mg (ISO-II) and 30.0 mg (ISO-III) per kilogram of body weight, respectively. The plasma total cholesterol levels and the TBA-reactive substances contents in the liver and kidney were significantly lowered in ISO-II and ISO-III groups compared to those in the diabetic control group. The levels of plasma HDL-cholesterol, plasma vitamin A and hepatic superoxide dismutase were significantly increased in those two groups compared with the diabetic control group. The present study demonstrated the possibility that the diets supplemented with 3.0 mg and 30.0 mg of soybean isoflavone extract may have beneficial effects on the plasma lipids, tissue lipid peroxidation and partly on antioxidant system in diabetic animals and there were no significant differences between the ISO-II and ISO-III groups. The results suggest that the effective daily dosage level of isoflavone for improving lipid metabolism in diabetic rats may be above 3.0 mg per kilogram body weight.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.226-238
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• 2011

RAMS (Reliability, Availability, Maintainability, Safety) study has received far less rigorous analysis in the system performance and integration level, and RCM (Reliability Centered Maintenance) research has been studying to improve the maintenance efficiency in the operational steps based on collected data of real operational cases. This paper analyzes the basic concepts based on KS X ISO/IEC 15288 system life-cycle process in the whole system for the light rail transit construction, and the research suggests an approach to the management process of the applicable main tasks. The paper "Management Process Study to RAMS Application of Light Rail Transit System" introduces Airport Rail cases and guidelines by using RAMS which is the major role in the system engineering technical process of ISO/IEC 15288 (International Organization for Standardization/International Electrotechnical Commission 15288) to apply RAMS in domestic light rail transit efficiently, the aim of this study is to broaden of understanding RAMS.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.223-226
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• 2006

산업용 소프트웨어의 유형은 크게 패키지형, 내장형, 시스템형으로 구분할 수 있다. 패키지형 소프트웨어는 산업용 ERP를 의미하며, 내장형 소프트웨어는 산업용 기기에 내장되어 사용되고, 시스템형은 제조 및 생산 시스템의 전반적인 제어를 위한 소프트웨어이다. 본 연구에서는 산업용 내장형 소프트웨어를 대상으로 하여 품질시험 및 평가를 수행할 수 있는 평가모듈의 개발에 관해 기술하였다. 평가모듈의 객관성 및 타당성을 제고하기 위해서는 국제표준을 기반으로 한 체계 구축이 필수적이다. 관련된 국제표준으로는 소프트웨어 제품의 요구사항 및 평가에 관한 표준인 ISO/IEC 12119와 9126이 있으며, 평가모듈의 구성 형식을 규정하고 있는 ISO/IEC 14598-6이 있다. 이러한 표준들을 기반으로 하여 산업용 내장형 소프트웨어의 품질 요구사항을 추출하고 품질 요구의 만족 수준을 평가할 수 있는 평가 모듈을 구축하였다.

• Korean Journal of Computational Design and Engineering
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• v.8 no.3
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• pp.141-149
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• 2003

The ship STEP is an international standard for the computer-interpretable representation of ship product information and for the exchange of ship product model data. The ship STEP consists of several APs(Application Protocol), such as AP215(ship arrangement), AP216(ship moulded form), AP218(ship structures), AP226(ship mechanical systems), and AP234(operating logs, records, message). The STEP AP216(ISO 10303) are an application protocol for the exchange of ship arrangement and ship moulded forms. The AP216 specifies the geometric shape and the hydrostatic properties of the ship moulded form. This paper introduces the state-of-the-art of ship STEP AP216 and develops the test case for the validation of data structure of AP216.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.225-226
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• 2023

선박의 애플리케이션 간에 표준화 되지 않은 데이터를 교환하고 처리를 용이하기 위하여 데이터 구조를 통일화하는 통합 규칙이 필요하다. 이에 ISO 19848 표준안은 선박 내 데이터 교환 및 향후 선상 장비가 인터넷에 직접 연결될 수 있는 사항까지 고려하여 데이터 채널 ID를 Codebook에 따라 지정하도록 제안하고 있다. 우리나라는 '자율운항선박 기술개발'을 통하여 자율운항 시험선을 대상으로 데이터 분류 규칙과 표준화된 Codebook 개발을 진행하고 있으며 이를 한국산업표준 제정하기 위하여 표준화 작업을 진행하고 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.220-226
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• 2016

Because MS(Multi-Strand) cables consist of many strands, a jacking force is applied to each strand one by one for cable construction. All strands should have an equal tensile force when the last one is wedged. This is the core technology for MS iso-tensioning. In this study, a new MS cable iso-tensioning system was developed for controlling and jacking the high-strength strands, with an ultimate tensile strength of 2,200MPa, for a stay cable of extra-dosed/cable-stayed bridges. The newly developed iso-tensioning system consists of electrical resistance load cells, hydraulic jacking devices, hydraulic pumps, and integrated controllers. Moreover, it is embedded with an algorithm that can control and predict the variations in tensile forces of the Master and Slave strands in real time. Actual experiments were carried out to verify the function and performance of the newly developed system. This system was applied successfully to the stay cable construction of 2nd Tae-in extra-dosed bridge in Gwangyang.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.9
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• pp.1993-1999
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• 2011

This paper describes a design of area-efficient/low-power cryptographic processor for HIGHT block cipher algorithm, which was approved as standard of cryptographic algorithm by KATS(Korean Agency for Technology and Standards) and ISO/IEC. The HIGHT algorithm, which is suitable for ubiquitous computing devices such as a sensor in USN or a RFID tag, encrypts a 64-bit data block with a 128-bit cipher key to make a 64-bit cipher text, and vice versa. For area-efficient and low-power implementation, we optimize round transform block and key scheduler to share hardware resources for encryption and decryption. The HIGHT64 core synthesized using a 0.35-${\mu}m$ CMOS cell library consists of 3,226 gates, and the estimated throughput is 150-Mbps with 80-MHz@2.5-V clock.