HAZOP 분석 자동화를 위한 객체지향 모델링

이진명,허보경,황규석 한국산업안전학회 1998 한국안전학회지 Vol.13 No.1

Hazard and operability (HAZOP) analysis is one of the safety analysis method that is used in the chemical complex, because it can systematically identify causes and consequences of all the deviation that could occur. Since this method needs to hire specialized experts, it is costly and time-consuming. Therefore HAZOP Expert System has been developed to automate this analysis. This approach introduced object-oriented method and knowledge representation which is hierarchical tree of units to supply flexibility in the system, functional semantic network, propagation equation and rule-chaining method to set up the expert system for automating HAZOP analysis.

나일론 6의 유리 섬유 합성율이 피로 파양 특성에 미치는 영향

김용수,허윤경,태순호 한국산업안전학회 1998 한국안전학회지 Vol.13 No.4

In recent years, a number of metal machine parts, in the field of the car manufactures and electronic goods for home, have been replaced by nylon-6 in order to weight, cost, and a period of process of manufacture. It's because nylon-6 materials as an industrial material have higher economical and productive advantage than the metalic ones. However, in domestic injection manufactures, there are few data on fiber glass synthetic on nylon-6. It is said that plastic in process of manufacture using the same injection materials make their results different in large scale according to fiber glass synthetic rate conditions. In this study, we have studied effects of the glass fiber synthetic rate on the characteristics of fatigue failure for nylon-6.

The Relief Effects of Ramelteon on Refractory Chronic Migraine: A Case Report

Yi-Cheng Hou1,Chien-Han Lai 대한정신약물학회 2016 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.14 No.4

The selective melatonin receptor agonism effect of ramelteon is useful for insomnia. Here we wanted to present a refractory chronic migraine case, who had significant improvements in migraine after using ramelteon. The possible mechanism for the ramelteon in the migraine relief might be related to melatonin effects.

A direct shape optimization approach for contact problems with boundary stress concentration

H. Ou,B. Lu,Z. S. Cui,C. Lin 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.9

The paper presents a direct shape optimization approach that minimizes both boundary stress concentration and peak contact pressure of multi-body contact systems. This approach is centered on the direct shape modification of boundary regions of stress concentration measured by von Mises stresses and contact surfaces measured by contact pressure. Without requiring sensitivity data for shape modification,shape optimization is made directly on nodal positions through an iterative computational scheme. Therefore, this approach is simple to implement using either commercial finite element software or in-house programs. An adjustable weighting factor is used to ensure stable and accelerated convergence in shape optimization. To evaluate the proposed approach, three case problems are presented,and the results show that this direct shape optimization approach can be especially applicable to the design and analysis of multi-body systems where boundary stress concentration and contact pressure distribution are an important consideration.

Antimutagenic Effects of Lycopene and Tomato Purée

Zdeňka Polívková,Petr Šmerák,Hana Demová,Milan Houška 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.6

Several health benefits, including protection from tumors at various anatomic sites, such as the lungs, stomach, and prostate gland, have been attributed to tomatoes and tomato-based products. Among tomato carotenoids, lycopene is the most active antioxidant, although it has many other biological effects, but data on its antimutagenic effects are scarce and often discrepant. The aim of our work was to determine the protective effects of lycopene, with regard to mutagenicity, via two indirect mutagens/carcinogens—2-amino-3-methylimidazo[4,5-f]quinoline (IQ) and aflatoxin B1 (AFB1) and the direct mutagen/carcinogen N-nitroso-N-methylurea (MNU)—using the Ames and micronucleus tests. The significant, dose-dependent, antimutagenic effects of two concentrations of lycopene (30μg and 300μg per plate) were demonstrated at various concentrations of both AFB1 and IQ in two strains of Salmonella typhimurium (TA98 and TA100). The protective effects of lycopene relative to MNU were lower in comparison to its protective effects relative to AFB1 and IQ. Mice treated for 3 days with different doses of lycopene (either 25 or 50mg/kg of body weight) prior to administration of individual mutagens resulted in a significant reduction of micronuclei numbers in the micronucleus test. Tomato purée (tested using the Ames test and AFB1) revealed a much stronger, dose-dependent, antimutagenic effect compared with corresponding doses of pure lycopene. Results indicate that lycopene has antimutagenic effects, although the effects are lower than that of tomato purée, which contains a complex mixture of bioactive phytochemicals. The antimutagenic effect is connected with the chemoprotective role of lycopene, tomatoes, and tomato products in the prevention of carcinogenesis.

ANALYSIS ON STRAIN FATIGUE IN GIGH STRENGTH STRUCTURE STEEL 16NiCo

Hou, Hou, J.Y.,Han, Han, Y.F.,Gu, Gu, T. 한국재료학회 1995 Fabrication and Characterization of Advanced Mater Vol.1 No.2

The low cycle strain fatigue of steel 16NiCo was investigated in details, and the cyclic stress-strain behaviors were discussed and analysized. The results have shown that the strain fatigue strength of steel 16NiCo is comparable to the same kind of steel AF1410 produced in U.S.A., and the cyclic softening would occur during the cycle loading. In addition, the analysis and calculation for plastic strain energy have indicated that the best combination of the strength with ductility of steel 16NiCo can be achieved under standard heat treatment.

Analysis of Integrating the Yan'an Spirit into University Education in China's New Era

Hou Tianzuo(Tianzuo Hou),Zheng Xueyin(Xueyin Zheng) 아시아사회과학학회 2023 Jornal of Asia Social Science Vol.10 No.2

The Yan'an Spirit is a unique ideological and cultural phenomenon that emerged during the period of China's War of Resistance against Japan. It represents the experience summary and theoretical innovation of the Chinese nation in the Yan'an area. The Yan'an Spirit is an important part of China's spiritual heritage with rich connotations. It not only enabled the Chinese nation to defeat the Japanese invaders in conjunction with the international community during World War II, but also helped to establish a more confident national identity, providing great impetus for China's modernization. Today, university education in China has the mission of cultivating students. Integrating the Yan'an Spirit into university education can help college students strengthen their ideals and beliefs, and persist in seeking truth from facts. Therefore, in the new era, it is necessary to combine the characteristics of China's university education with the actual situation of universities' own development, and continually explore innovative paths to integrate the Yan'an Spirit into university education in China.

Decomposition of socioeconomic inequalities in glaucoma knowledge in Taiwan

Chiun-Ho Hou(Chiun-Ho Hou),Christy Pu(Christy Pu ) 한국역학회 2024 Epidemiology and Health Vol.46 No.-

Analysis of dynamic RBC aggregation in microfluidic device using laser backscattering

Hou Jianxun(호우지엔쉰),Yunhee Ku(구윤희),Sehyun Shin(신세현),Jangsoo Suh(서장수) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11

The aggregation characteristics of red blood cells (RBCs) play an important role in microvascular flow system and increased RBC aggregation has been observed in various pathological diseases, such as thrombosis and myocardial infarction. This paper presents a novel microfluidic device for evaluating the aggregability of RBCs on the flow of blood by directly measuring aggregating force (critical shear stress) to overcome shearing force due to flow in a microchannel. The device functionality is based on a microfluidic slit rheometry with decreasing pressure-driven flow mechanism with laser light backscattering technique. The present RBC aggregation index shows a higher sensitivity to small changes of aggregation modulated by amount of fibrinogen in blood plasma. The direct measurement of RBC aggregating force represents a new concept for the field of blood rheology and should prove beneficial for basic science and clinical applications.

Shock analysis of a new ultrasonic motor subjected to half-sine acceleration pulses

Hou, Xiaoyan,Lee, Heow Pueh,Ong, Chong Jin,Lim, Siak Piang Techno-Press 2016 Advances in computational design Vol.1 No.4

This paper aims to examine the dynamic response of a newly designed ultrasonic motor under half-sine shock impulses. Impact shock was applied to the motor along x, y or z axis respectively with different pulse widths to check the sensitivity of the motor to the shocks in different directions. Finite Element Analysis (FEA) with the ANSYS software was conducted to obtain the relative displacement of a key point of the motor. Numerical results show that the maximum relative displacement is of micro meter level and the maximum stress is five orders smaller than the Young's modulus of the piezo material, which proves the robustness of the motor.