Go to the main menu
Skip to content
Go to bottom
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 22, Issue 6 - Dec 2007
Volume 22, Issue 5 - Oct 2007
Volume 22, Issue 4 - Aug 2007
Volume 22, Issue 3 - Jun 2007
Volume 22, Issue 2 - Apr 2007
Volume 22, Issue 1 - Feb 2007
Selecting the target year
Evaluation of Fatigue Endurance for a Rocker Arm of Diesel engine
Kim, Ho-Kyung ; Yang, Kyoung-Tak ; Kim, Hyun-Jun ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 1~6
In order to evaluate fatigue endurance for the rocker arm of a diesel engine, stress measurements were performed using the strain gages attached near the neck, where is one of the most critical region in the rocker arm, in variation of the engine speed. The fatigue life experiments were carried out on miniature specimens from the rocker arms. For evaluating the fatigue endurance of the rocker arm, the S-N data were compared with the stress analysis results through FEM analysis of the rocker arm. The effective stress of the neck region was determined 17.7MPa through FEM analysis of the rocker arm. Conclusively, on the basis of fatigue limit, the rocker arm has a safety factor of 2.8 or 3.4 from the stress measurement or FEM results, respectively.
Electrical Fire Detection System using Temperature and Current Detectors
Kim, Doo-Hyun ; Kim, Sung-Chul ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 7~12
This paper presents the development of an electrical fire detection system using digital temperature and current detectors in order to sound for electrical fire in advance. As the demand for electricity is increasing and industrial facilities are getting more complex and larger in size, the losses of human life and property are on the increase by electrical fires. In order to prevent electrical fires, it is required to find out fire signatures, or electric signal of the overcurrent and overheating. Therefore, in this paper, developed is an electrical fire detection system based on the detection of signal for overcurrent and overheating to prevent electrical accidents in advance that happen in electrical wires. The developed system gives an alarm by computer monitor, speaker system and mobile phone before electrical fires occur and give severe damages to human beings and properties, and the system can be implemented and supplied for business and residental buildings at a low price. The usefulness and validity of the system, also, verified in this paper by case study and experiments.
Environmental Hazardous Assessment on Wood Panel Manufacturing Process
Lee, Su-Gil ; Lee, Nae-Woo ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 13~21
Personal and static sampling for formaldehyde, wood dust and noise monitoring, in accordance to the equipment running on the day, were carried out throughout wood panel manufacturing process. Even though the exposure level of formaldehyde and wood dust were below than exposure criteria, but the personal protective equipment(PPE) for those should be worn to everyone in the process because of its potential characteristics like carcinogenicity. Also a few local air extraction system above the cutting, grinding sections and organic blending room should be required. Most of the exposures of noise exposure were exceeded permitted exposure criteria, in case of Hopper operators, exposed to maximally 94dB(A) as LAeq 8hr, therefore active controls like PPE, monitoring, isolation etc. are necessary. The main sources of noise were caused on compressed air of the machinery, radio sound and operation noise like running machines, conveying, cutting, sawing, moving vehicles, storing and so on. For the comparison of control criteria in each country, the permitted exposure standards for above hazardous materials and noise in Korea, ACGIH and Australia were discussed. We have recognized that the Korean criteria should be discussed urgently to give the right information to employee and modified, if it is necessary.
Measurement of Flash Points of Epoxy Resin Solutions by Using Additives
Ha, Dong-Myeong ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 22~27
The knowledge of the flash point of the various liquid substances is required because of process safety and control in industrial fire protection. The epoxy resin is one of versatile resins that has wide selection of using curing agents and additives to achieve various applications such as coatings, adhesives, interior materials, reinforced plastics and electrical insulation. In this study, the lower flash points for p-xylene+epoxy resin, o-xylene+epoxy resin and n-butanol+epoxy resin systems were measured by using Pensky-Martens closed cup tester. The lower flash points for p-xylene+epoxy resin, o-xylene+epoxy resin and n-butanol+epoxy resin systems rapidly increased 80wt%, 90wt% and 95wt% of epoxy resin concentration, respectively. This results serve as a guide to estimate flash point of any epoxy resin solution.
A Study on Concentration Analysis for Decreasing Air Pollutants
Kim, Yun-Seon ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 28~33
Often Regular Measurement Target 32 Spots which are distributed at Seo-gu in Incheon Metropolitan and Odour Emission Target 100 Factories based on the task instruction of Ministry of Environment in Korea were selected by considering to atmosphere phenomena and regional characteristics etc. This paper aims at building the Decreasing Prediction System of Odour which is capable of comparing and examining the concentration distribution by odour compounds, the distribution maps of odour diffusion and the contribution degree of sphere of influence, which is discharged from these above spots and factories.
A Study on the Extinction Concentration of Inert Gas for Extinction Performance Estimation of Kerosene
Choi, Jae-Wook ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 34~38
The experiment was done to investigate extinguishing concentrations of different inert gases of verying concentrations made in contact with Kerosene. The experimental results obtained are as follows; at a standard amount of air flow was 40L/min, the extinguishing concentration of Argon, Nitrogen, Carbon dioxide and Helium for Kerosene were 36.5%, 27.3%, 17.4%, 12.3%, respectively. And, according to these results, Helium of 12.3% showed the lowest extinguishing concentration.
A Study on the Evaluation of Job Stresses for Managers in the Construction Industry
Lee, Do-Young ; Kim, Wan-Jin ; Yi, Young-Seop ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 39~44
Job stresses are realized as harmful factors affected workers' mental health. Job stresses can be defined as the physical and emotional responses that are occurred when the job requirements should be beyond the workers' abilities, followed with health problems and even work-related injuries. Job stresses could be resulted from the work environment and conditions related with workers' personality. This study is conducted to evaluate the job stresses for managers in the construction industry, by the questionaires which collected 302(75.5%) among 400 ones. The evaluation items are the levels of job stresses and stressors as well as the relationship between the variables. The controls should be recommended for physical and mental health.
Reinforcing Effects of Umbrella-type Shell Roofs with Stiffeners
Son, Byung-Jik ; Jung, Dae-Suck ; Lee, Kyu-Hwan ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 45~50
In this study, reinforcing effects of umbrella-type shell roofs structures such as stadium, exhibition, auditorium and museum are analyzed. Umbrella-type shell roofs treated in this study are practical shapes of conical shells. The objective of this study is to analyze reinforcing effects of umbrella-type shell roofs with stiffeners. Various locations of stiffeners, that is, edge ring A, B, center ring, junction stringer and center stringer are presented and the effects of reinforcement is examined. Also, the reduction effects of roofs thickness by stiffeners are examined. It is shown that the thickness of roofs can be reduced about
by junction stringer and more than 60% by edge ring A.
A Probability-Based Durability Analysis of Concrete Structures in Chloride Containing Environments
Kwon, Ki-Jun ; Kim, Dong-Baek ; Jung, Sang-Hwa ; Chae, Seong-Tae ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 51~56
In recent years, many research works have been carried out in order to obtain a more controlled durability and long-term performance of concrete structures in chloride containing environments. In particular, the development of new procedures for probability-based durability analysis/design has proved to be very valuable. Although there is still a lack of relevant data, this approach has been successfully applied to some new concrete structures. In this paper, the equation used for modelling of the chloride penetration was based on Fick's Second Law of Diffusion in combination with a time dependent diffusion coefficient. The probability analysis of the durability performance was performed by use of a Monte Carlo Simulation. The procedure was applied to an example based on limited data gathered in this country. The influences of each parameter on the durability of concrete structures are studied and some comments for durability design are given. The new procedure may be very useful in designing an important concrete structures in chloride containing environments. Also it may help to predict the service life of concrete structures under a given probability of failure.
Influence of Carbonation and Freezing-thawing on the Chloride Diffusion in Concrete
Kim, Dong-Baek ; Kwon, Ki-Jun ; Jung, Sang-Hwa ; Bok, Hoon ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 57~64
Recently, the corrosion of concrete structures has received great attention related with the deterioration of sea-side structures, such as new airport, bridges, and nuclear power plants. In this regards, many studies have been done on the chloride attack in concrete structures. However, those studies were confined mostly to the single deterioration due to chloride only, although actual environment is rather of combined type. The purpose of the present study is, therefore, to explore the influences of carbonation and freezing-thawing action to chloride attack in concrete structures. The test results indicate that the chloride penetration is more pronounced than the case of single chloride attack when the carbonation process is combined with the chloride attack. It is supposed that the chloride ion concentration of carbonation region is higher than the sound region because of the separation of fixed salts. Though the use of fly ash pronounces the chloride ion concentration in surface, amounts of chloride ion penetration into deep region decreases with the use of fly ash. The small reduction of relative dynamic elastic modulus induced from freezing-thawing increases the chloride ion penetration depths much. The present study allows more realistic assessment of durability for such concrete structures which are subjected to combined attacks of both chlorides and carbonation or freezing-thawing but the future studies for combined environment will assure the precise assessment.
Assessing the Safety Management Performance of Korean Domestic Construction Companies and Improvement Plans
Son, Chang-Baek ; Lee, Dong-Eun ; Choi, Seung-Mo ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 65~73
This paper presents the safety performance of Korean domestic 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 four groups by construction capacity ranking, are investigated. General recognition that there is a wide difference of safety performance among domestic construction companies by construction capacity ranking was confirmed by comparing the safety performance at the head office and the job sites of the companies under the study. Data analysis shows that the safety performance of the group I and II has the largest difference, and this difference of the group II and III and group III and IV are gradually decreased, respectively. This paper presents the safety performance improvement measures, which is applicable to safety management components consisting of both the head office and job sites safety management systems of each group (e.g., I, II, III and IV) suffering the lack of safety performance.
Slope Stability Assessment for Colluvial Soil Slumps of the Danyang Region
Bae, Woo-Seok ; Lee, Bong-Jik ; Jang, Kwang-Tak ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 74~80
In this study, a documentary survey, face mapping, and stability analysis were performed on the collapsed colluvial soil slope. The purpose of this paper is to identify the cause of slope failure and determine slope stability for similar areas. Boring samples were extracted from the slump and laboratory tests were performed to find out the cause of slope failure. In addition, the limit equilibrium method was used in order to determine the stability of the slope. As a result of this investigation and the analysis of data, the type of collapse and cause of slope failure have been shown to have a strong correlation with the natural geographical and geological features which make up the collapse profile of the study area. These results will help to develop guidelines for formulating countermeasure methods.
A Study for Prevention of Musculoskeletal Disorders Using Digital Human Simulation in the Shipbuilding Industry
Chang, Seong-Rok ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 81~87
In this study digital human models of ship construction tasks using modeling & simulation were constructed and human models' activities through human activity analysis were evaluated. Human Factors experts analyzed the actual workers' tasks using the same technique used in human activity analysis at the same time. The main objective of this study is to check a possibility of applying digital human modeling technique to ship construction tasks that are mostly non-standardized(not uniformed) whereas most applications of digital human modeling technique have been applied to standardized tasks. We evaluated postures of both real workers and digital humans by RULA. It turned out that the final scores of RULA evaluation on real workers are the same as the RULA scores for digital humans. However, there were differences of RULA detail scores between real workers and digital humans in the several processes related with the wrist twist and deviations. Those differences are considered to be resulted from the error in the on-site measuring worker's body dimension which could be reduced by accurate tools to correct data for body dimension and digital real drawings for facilities. The results showed possibility of application of digital human modeling and ergonomic analysis on informal work operations as well as formal operations in the shipbuilding industry.
A Study on the Introduction of Speed Enforcement System Using Point-to-point Speed Measurement
Lee, Sang-Soo ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 88~97
A point based speed enforcement system(SES) has been widely used in roadways to reduce the operating speeds and potential traffic accidents. Recently, the needs for introudcing new SES using point-to-point speed measurement was presented, however, no practical guidelines or justification of the system was available. This study investigated the effectiveness of the current SES and introduction of the new SES through user interview survey method. Survey results showed that 33% of respondents were unsatisfactory to the current way of SES operation, which was 11% higher than satisfactory respondents, and about 70% of the respondents supported the introduction of point-to-point based SES operation. A majority of respondents preferred the straight roadway segment, bridge and tunnel, and curved roadway segment for a start application site with the segment length of 1-5 km long. Using these survey results, an introduction scheme was discussed in terms of legal bases, installation criteria, and operational guidelines.
A Study on Estimation of Human Damage Caused by Rupture of Butane Can
Leem, Sa-Hwan ; Huh, Yong-Jeong ; Choi, Seong-Joo ; Lee, Jong-Rark ; Lim, Dong-Yeon ;
Journal of the Korean Society of Safety , volume 22, issue 3, 2007, Pages 98~104
As the industrial society is highly developing, human need in daily life has also changed drastically. With the introduction of 40 hour working week system, more households enjoy picnics on weekends. More gas accidents take place on Saturdays and on Sundays than any other days of week. In this context, the Institute of Gas Technology Training in Korea Gas Safety Corporation carries out explosion experiment to make trainees to take all possible measure to ensure safe management of gas in the field by fully recognizing the hazards of gas explosion accidents. In this study, the influence of explosion over-pressure caused by the rupture of butane can thrown away after use was calculated by using the Hopkinson's Scaling Law and the accident damage was estimated by applying the influence on the adjacent people into the Probit model. The value of those away from 50 meters from the explosion site was 1.35kPa and the peak overpressure to thoes away from 25 meters directly was 3.2kPa. Those value was input to the PROBIT model, the estimation showed the sante result 0 percent of damage possibility.