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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Safety
Journal Basic Information
Journal DOI :
The Korean Society Safety
Editor in Chief :
Volume & Issues
Volume 24, Issue 6 - Dec 2009
Volume 24, Issue 5 - Oct 2009
Volume 24, Issue 4 - Aug 2009
Volume 24, Issue 3 - Jun 2009
Volume 24, Issue 2 - Apr 2009
Volume 24, Issue 1 - Feb 2009
Selecting the target year
A Study on the Characteristics of Smoke Emissions from Heavy Duty Diesel Vehicles Using a Chassis Dynamometer
Jin, Kwang-Suk ; Lee, Choong-Hoon ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 1~10
The characteristics of smoke emissions from diesel heavy duty vehicles which weigh over 5.5 tons was investigated by driving the vehicles with both the Lugdown 3 modes in the chassis dynamometer and tree accelerating mode under no load. The vehicles include commercial vehicles such as bus, microbus, trucks and specialized vehicles, etc. The total numbers of the vehicles tested were 200. The light extinction method was used to measure the smoke emissions from the vehicles tail pipe. The values of the smoke emissions in the tree accelerating mode showed
band nearly independent of both the mileage and year of production of the tested vehicles, while those in the Lugdown 3 modes showed
of wide band. The correlation coefficients between the values of the smoke emissions with both the Lugdown 3 modes and the free acceleration mode were 0.12, 0.08, 0.12, respectively. The inspection with Lugdown 3 modes is better one than that with tree acceleration from the point of exact inspection of the diesel vehicles' smoke emission.
A Study on Contact angle of the Linear Guide Way
Lee, Sun-Kon ; Park, Young-Gee ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 11~16
This research investigates contact angle of Linear Guide Way through a experimental result and theoretical analysis. Since last ten years, most of researchers who concerned with the precision machinery and semiconductor device production etc. so the researches about Linear Guide Way have been unnoticed. The precision machinery and semiconductor device production system has the principle which transfers the mechanical moving to accuracy position control. The Linear Guide Way system has the principle which transfers mechanical moving to accuracy position control is very important to improve performance of the precision machinery and semiconductor device production system. So, In this research, in order to improvement for producing Linear Guide Way, bearing loading analysis and contact angle change through Linear Guide Way theoretical analysis and bearing modeling. Through this study, we may expect that there will be more improvement for producing Linear Guide Way.
Experimental Study on the Fire Whirl Characteristics of Oriental Oak Leaves
Hong, Ki-Bae ; Lee, Jae-Ha ; Bae, Seung-Yong ; Ryou, Hong-Sun ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 17~21
The fire whirl occurring in the urban and/or wildland fire is generated by the instabilities of atmosphere. The fire whirl is a rare phenomenon, but highly destructive because it has high inhalation and lift force. In this study, experimental study is performed with oriental oak leaves, for investigating of the fire whirl characteristics occurred in wildland fire. As a result of experiment, the circulation intensity increases as increasing of the induced air velocity, and then the fire whirl occurs. Also, the heat release rate and flame height increase 22% and 18% in highest circulation.
Effect of the Piezoelectric characteristics on the PSN-PNN-PZT Ceramics added with Mn and Cu
Lee, Sun-Kon ; Lee, Ki-Su ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 22~27
In this paper, the minuteness structure, piezoelectric, and dielectric characteristics of
CuO ceramics has been systematically investigated as a function of the sintering temperature after manufacturing the specimens with a general method. This study will be very helpful as basic data for developing ceramic materials, More study in a soon time for improving stability of temperature, effect of adds and stability and reality of frequency with improved production condition for specimens will give a powerful potentiality as a applied material of dielectric ceramics.
Examination on the Mounting Status of Cigar Lighter Receptacle for Vehicles and Analysis of its Tracking Characteristics
Choi, Chung-Seog ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 28~33
This study examined the mounting status of cigar lighter receptacles for vehicles and analyzed the tracking phenomenon that occurs when foreign material entered a cigar lighter receptacle to obtain data for the analysis of accident investigation. Regardless of the vehicle's output, cigar lighter receptacles are mounted in a vehicle horizontally, vertically, or at tilting or inclined angle. The tilting type cigar lighter receptacle is much easier to use but current leakage resulting from foreign materials (coffee, beverages, water, etc.) falling into the cigar lighter receptacle may cause a fire to start. This study used a vehicle battery (DC 12V) as a power supply for the tracking test and configured its circuit in the same way as that of an electrical device in a vehicle. The tracking phenomenon that occurred in the standby mode of the vehicle exhibited a fine flame and an irregular occurrence of smoke. While this tracking phenomenon was occurring, the leakage current and the reaching distance of the flame were measured to be approximately 930mA and
, respectively. It is thought that the resultant flame may ignite toluene, dust, cigarettes, etc. It was observed that as the tracking progressed, the internal metal socket melted and a hole was created, the surface of which was also severely carbonized. In addition, the electrical resistance of the carbonized conductive path was measured to be approximately
. It is thought that this much resistance may cause local heating when leakage current flows and could ignite any nearby flammable material.
Removal of Amaranth by Activated Carbon Adsorption
Lee, Jong-Jib ; Yoon, Sung-Wook ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 34~39
The adsorption characteristics of amatanth by granular activated carbon were experimently investigated in the batch adsorber and the packed column. The adsorptivity of activated carbon for amaranth were largely improved by pH control, and 94 percent of initial concentration(100mg/L) could be removed at pH 9. It was estabilished that the adsorption equilibrium of amaranth on granular activated carbon was sucessfully fitted by Freundlich isotherm equation in the concentration range from 1mg/L to 100mg/L. The characteristics of breakthrough curve of activated carbon packed column, which depend on the design variables such as initial concentration, bed height, and flow rate, were studied.
An Evaluation of Thermal Stability on Esterification Process in Manufacture of Concrete Mixture Agents
Lee, Keun-Won ; Lee, Jung-Suk ; Choi, Yi-Rae ; Han, In-Soo ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 40~46
The early identification of thermal hazards associated with a process such as the heats of reaction, exothermic decompositions, and the understanding of thermodynamics before any large scale operations are undertaken. The evaluation of reaction factors and thermal behavior on esterification process in manufacture of concrete mixture agents are described in the present paper. The experiments were performed in the differential scanning calorimetry(DSC), C 80 calorimeter, and thermal screening unit(
). The aim of the study was to evaluate the thermal stability of single material and mixture in esterification process. We provided the thermal data of chemical materials to present safe operating conditions through this study.
A Study on Environmental Monitoring of Fluorouracil and Decontamination Reagents
Lee, Su-Gil ; Lee, Nae-Woo ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 47~52
This study has been to examine the occupational exposure levels of Fluorouracil (5-FU) in a hospital and to investigate the most effective cleaning reagent for control. Fluorouracil is one of the cytotoxic drugs which are therapeutic agents used to treat cancer. The health practitioners working in the cytotoxic work room and oncology ward areas are exposed to adverse health risks like cytogenetic and DNA damage from cytotoxic drugs exposure by frequent skin contact from contaminated surfaces. Four kinds of cleaning reagents has been examined to degrade the 5-FU. It was found that 5-FU was only degraded soon after the reaction in 0.5%(w/v) NaClO solution. Therefore, 0.5%(w/v) NaClO solution has been chosen to decompose any residues on the contamination surfaces. A substantial level of contamination was found on the surfaces of cytotoxic work room and oncology ward areas. The contamination ranges of the surfaces in cytotoxic work room and oncology ward areas were from 2.0 to
and 5.39 to
respectively. Consequently, regulation of the occupational exposure limit, procedure of special cleaning, and the use of personal protective equipment are recommended during the manipulation and administration of the drugs to avoid skin contamination from cytotoxic drugs like 5-FU.
A Study on the Evaluation Methods from Probability Computation of Bridge
Kim, Doo-Hwan ; Yoo, Chang-Uk ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 53~58
The importance of process for repair and reinforcement of the bridge is increasing because of the lack of the fatigue load and stress, a lowering of the bridge load carrying capacity owing to impact and oscillation, deterioration on cultivation periods of the bridge, etc. Typically the experimenter values the bridge load carrying capacity by the real rating factor and response modification factor in bridge load rating through static load test and dynamic load test. But the error occurred in reliability of response modification factor in bridge load rating according to experience of experimenter. so tests of connecting probability theory and valuation of the bridge recently. The study is to compute the real load carrying capacity of the bridge and the rating factor and response modification factor on grade of the bridge, and calculate the probability of over-loaded truck load from Weigh In Motion(WIM) Data in FORTRAN programming applying to Monte-Carlo Simulation. At the result of this study, it is acquired that the new grade is computed for the probability of over-loaded truck load and surface inspection. The A grade is over 1.95, B grade is
, C grade is
, D grade is
, E grade is under 1.13 of rating factor, respectively.
Assessing the Safety Performance of Domestic Small-Sized Construction Companies
Son, Chang-Baek ; Hong, Sung-Ho ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 59~65
This paper presents the safety performance of domestic small-sized construction companies including the characteristic and current status of safety management actions of the firms. Safety performance both at the head office and job sites of each construction companies, which are divided two groups by construction capacity ranking, are investigated. The investigation results on the small-sized construction companies in this study was compared with those of on the large and medium-sized construction companies studied in existing papers. General recognition that there is a wide difference of safety performance among domestic construction companies by construction capacity ranking was companies by this study. Especially, Data analysis shows that the safety performance of the small-sized companies has the larger difference than large and midium-sized companies.
Seismic Performance Evaluation of School Buildings in Gyunggi Region Considering Seismic Hazard Map
Ryn, Han-Gook ; Park, Tae-Won ; Lee, Sang-Hyun ; Chung, Lan ; Cho, Seung-Ho ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 66~73
Since the school buildings are generally used as public shelters when the natural disasters such as flood and earthquake occur, it must be designed to show enough structural performance when subject to earthquake. Major failure mode of the school buildings observed in past earthquakes were shear failure of column of which length is shortened by infilled masonry blocks. In this study, the seismic risk of the reinforced concrete school building structure was evaluated by using the seismic performance evaluation methods of low-story RC structures developed in Japan and the required seismic performance index which is obtained according to the KBC2008 seismic hazard map and soil types. In this paper, the seismic performance of the school building is evaluated by considering this short-column effects, building shape and deterioration.
A Study on the Methods of Enhancing the Seismic Performance for Reinforced Concrete School Buildings - Ordinary Moment Frame
Kim, Hyeon-Jin ; Lee, Sang-Hyun ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 74~81
In this study, the seismic performance of RC school buildings which were not designed according to earthquake-resistance design code were evaluated by using response spectrum and push-over analyses. The torsional amplification effect due to plan irregularity is considered and then the efficiency of seismic retrofitting methods such as RC shear wall, steel frame, RC frame and PC wing wall was investigated. The analysis result indicate that the inter-story drift concentrated in the first floor and most plastic hinge forms at the column of the first story. Among the retrofitting methods, the PC wing wall has the highest seismic performance in strength and story drift aspect. Especially, it can make building ductile behavior due to the concentrated inter-story drift at the first column hinge is distributed overall stories. The axial force, shear force and moment magnitude of existing elements significantly decreased after retrofitting. However, the axial and shear force of the elements connected to the additional retrofitting elements increased, and especially the boundary columns at the end of the retrofitting shear wall should be reinforced for assuring the enhancement of seismic performance.
Reinforcement Location of Plate Girders with Longitudinal Stiffeners
Son, Byung-Jik ; Huh, Yong-Hak ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 82~89
Unlike concrete bridge, steel bridge resists external force by forming thin plate. Thus, because steel girder bridge has big slenderness ratio, buckling is a major design factor. Plate girder consists of flange and web plate. Because of economic views, web plate that resists shear forces is made by more thinner plate. Thus, web plate has much risk for buckling. The objective of this study is to analyze the buckling behaviors of plate girder and to present the proper reinforcement location of longitudinal stiffeners. Various parametric study according to the change of web height, transverse stiffeners and load condition are examined.
Survey on Experts' Opinion for the Legal Examination of WMSDs Risk Factors
Lee, In-Seok ; Park, Jae-Hee ; Jung, Hwa-Shik ; Kee, Do-Hyung ; Kim, Hyun-Joo ; Roh, Sang-Chul ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 90~95
The purpose of this study is to investigate industrial safety and health experts' opinions on the examination system of WMSDs(work related musculoskeletal disorders) risk factors. For doing this, a questionnaire study and two FGIs(focused group interview) were conducted. A questionnaire with open questions about the examination system was developed, and sent to 42 experts consented bye-mail. Of the experts, 24 experts responded, whose data were used in the analysis. The FGIs were performed for the persons in charge of industrial safety and health in industries and ergonomists. The questionnaire study revealed that most experts(91.3%) agreed with legalization of employers' duty for preventing WMSDs, necessity of the 11 tasks designated by Ministry of Labor, the examination system and ergonomics program, and pertinency for the examination system classification of periodic and occasional one. However, more than half experts disagreed with timeliness and appropriateness of the legal system. This was validated by the low approval rates for appropriateness of the 11 tasks, methods of the examination, charge person in the examination and ergonomics program. FGIs showed that it was desirable for the examination system to be legalized, and that the system was generally properly performed. It was suggested that the system be partially revised with reflecting problems disclosed during its enforcement rather than whole revision. It is expected that when revising relevant legal system, the results of this study would be used as valuable data.
A Study on Combustion of Living Leaves for Various Coniferous Trees and Broadleaf Trees in Youngdong Areas
Lee, Hae-Pyeong ; Lee, Si-Young ; Park, Young-Ju ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 96~103
This study was fulfilled to investigate the forest fire risk of forest fuels based on the combustion characteristics of living leaves of coniferous trees and broadleaf trees naturally growing in Youngdong areas of Gangwon Province by using cone calorimeter and smoke density chamber. According to the result, Pinus densiflora and Pinus rigida among coniferous trees released a greater amount of heat release than other kinds. The total smoke release varied depending on the species, whereas Pinus koraiensis showed the largest amount of smoke release. With regard to maximum smoke density, it was much higher in coniferous trees than in broadleaf trees. With regard to smoke temperature, Pinus densiflora showed the lowest compared to other kinds up until 200s from the ignition, but all most trees uniformly maintained constant temperature of about
after 200s. The concentrations of CO and
release were drastically increased at about 150s and then gradually decreased thereafter. Pinus densiflora showed a bit higher CO release than broadleaf trees, but there was no distinct difference in
release among tress.
Relative Risk Evaluation of Front-to-Rear-End Collision when Drivers Using Electronic Devices: A Simulation Study
Lee, Se-Won ; Lee, Jae-Sik ;
Journal of the Korean Society of Safety , volume 24, issue 4, 2009, Pages 104~110
In this driving simulation study, the impairing effects of various types of electronic devices usage(i. e., destination search by using in-vehicle navigation system, TV watching and dialing cellular phone) during driving on front-to-rear-end collision avoidance were investigated. Percentage of collisions, driving speeds when the drivers collided, and initial reaction time for collision avoidance were analyzed and compared as the dependent measures. The results indicated that (1) any types of electronic devices usage during driving induced more serious collision-related impairment than control condition where no additional task was required, and (2) in general, destination search task appeared to impair drivers collision avoidance performance more than the other task requirements in terms of percentage of collisions and initial reaction time for collision avoidance, but TV watching induced most serious collision impact. These results suggested that any types of electronic device usage could distract drivers attention from the primary task of driving, and be resulted in serious outcome in potentially risky situation of front-to-rear-end collision. In particular, mandatory use of eye-hand coordination and receiving feedback seemed to one of essential factor leading the drivers visual attentional distraction.