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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Safety
Journal Basic Information
Journal DOI :
The Korean Society Safety
Editor in Chief :
Volume & Issues
Volume 27, Issue 6 - Dec 2012
Volume 27, Issue 5 - Oct 2012
Volume 27, Issue 4 - Aug 2012
Volume 27, Issue 3 - Jun 2012
Volume 27, Issue 2 - Apr 2012
Volume 27, Issue 1 - Feb 2012
Selecting the target year
Evaluation of Multiaxial Fatigue Strength of a Urban Railway Wheel Steel
Ahn, Jong-Gon ; You, In-Dong ; Kwon, Seok-Jin ; Kim, Ho-Kyung ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 1~6
Uniaxial and biaxial torsional fatigue tests were conducted on the samples extracted from urban railway wheel steel. Ultimate and yield strengths of the steel were 1027.7 MPa and 626 MPa, respectively. The uniaxial fatigue limit was 422.5 MPa, corresponding 67% of the ultimate tensile strength. The ratio of
was 0.63. Fatigue strength coefficient and exponent were 1319.5 MPa and 0.339, respectively. Maximum principal and equivalent strain were found to be adequate parameter to predict fatigue lifetime of the steel under multiaixal fatigue condition.
Fire Cause Analysis on Electric Pad Due to Defect of Hot Wires
Song, J.Y. ; Sa, S.H. ; Nam, J.W. ; Kim, J.P. ; Cho, Y.J. ; Oh, B.Y. ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 7~12
This paper describes electrical fire on electric pad caused by defect of hot wires. We analyzed two type electric pad using by carbon type hot wire and magnetic shielded type hot wire. First, a carbon type hot wires electric pad is virtually impossible to connect hot wire as a method of electrical welding or soldering. In order to connect between hot wires, that has to splice carbon type material connector. If junction of hot wires was occurrence of poor connection on electric pad, it increase contact resistance on this junction point. With increasing contact resistance, junction of hot wires on electric pad generates local heating and finally leads to electrical fire. An electric pad using by a magnetic shielded type hot wire happened local heating on signal wire for sensing temperature-rise caused by applying current for magnetic shielded. With increasing local heating of signal wire, insulated coating of hot wire was melted. Finally the magnetic shielded type hot wire electric pad lead to electrical fire with breakdown between signal wire and hot wire. In this paper, we analyzed shape of damage in hot wire caused by electrical local heating and investigated fire cause on electric pad due to defect of hot wires.
Variation of Insulation Characteristics due to
-ray Irradiation on LDPE Contained Treeing Inhibitors
Ryu, Boo-Hyung ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 13~19
The effectiveness of treeing resistance in low density polyethylene containing azocompounds were investigated under radiation environments. 4-(4-nitrophenylazo)-1-naphthol and 4-(4-nitrophenylazo) resorcinol were selected for treeing inhibitors. LDPE containing the additives were crosslinked with dicumyl peroxide, irradiated by
-ray in the presence of air at room temperature. Treeing inception voltage, AC breakdown strength measurements were carried out for electrical insulation characteristics, thermoluminescence and gel contents were analyzed as various irradiation doses also. LDPE with treeing inhibitors showed much better insulation characteristics than pure LDPE. It is interpreted that molecular structures, polar groups and the type of radicals connected on the benzene ring of the additives affected electrical characteristics. From the results, 4-(4-nitrophenylazo) resorcinol was the most effective upon the best treeing and radiation resistance.
Experimental Studies on Eye Injury Risks by Different BB Pellet Materials
Kim, Hyung-Suk ; Park, Dal-Jae ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 20~24
Experimental studies were performed to investigate the eye injury risks by different BB pellet materials. Four different BB pellet materials were used: plastic (P), silicon (S), rubber (R) and plastic covered with silicon (SR). The BB pellet images penetrating into the gelatine simulant were recorded by a high-speed video camera. The results obtained from the different pellet materials were discussed in terms of impact velocity and penetration depth; threshold velocity and projectile sectional density; eye injury risks by normalized energies. It was found that the P pellets caused higher impact velocity while the lower was SR pellets. The penetration depth and threshold velocity of the pellets were dependent on the impact velocity of the pellets, and the P pellets resulted in the higher eye injury risk while the lower was SP.
A Study on Flexural Behavior of Precast Box Culvert with Blast Slag
Tae, Ghi-Ho ; Kim, Doo-Hwan ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 25~32
In this study, the effect of blast furnace slag on precast concrete culvert was assessed by measuring the flexural strength using to full scaled box culvert. As a result, the initial cracking load and yield load of reinforced concrete box converts are increased in comparison with those of the normal concrete box culvert, but the ultimate load is decreased slightly. It can be concluded that use of blast furnace slag induce to flexural strength in precast concrete box culvert greatly improved the serviceability.
A Case study on Effect of Compositeness for Temporary Bridge Integrated Lining Board and Girder
Yoon, Woo-Hyun ; Chung, Jee-Seung ; Lee, Jong-Soon ; Yoon, Yong-Seok ; Yang, Sung-Don ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 34~41
In this study, it has been proposed the new type of temporary bridge which is structural performance maximization to integrated cover plate and girder as well as roll of lining board. Of all temporary bridge integrated cover plate and main girder in the form of a new type of structure is advantageous for the judge, but to the field of transport difficulties and challenges due to high altitude operations to take advantage of this challenge and deliver a structured, easy transport, and the synthesis of lining board possible was proposed. Lining board proposed in this study through experimental synthesis and analysis of the factors that influence the effectiveness of the construction and economic development in the construction method was superior, compared to the conventional lining board.
Effective Disaster Risk Management Measures Fall
Kim, Eun-Jeung ; Ahn, Hong-Seob ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 42~48
The present study was motivated by the needs to make diversified scientific approaches toward influential factors like human, technical, organization, policy and environmental on the basis of the specialized information concerning the cause for industrial accidents in a measure to prevent the falling accident which has the biggest priority among the three major frequent industrial accidents. In this connection, diverse policies have been practiced in the meantime, with little effects in fact to reduce occurrence of industrial accidents, seemingly because such policies have been practiced on the direct dimension, instead of tries to nip in the bud of fundamental causes. This study was thus conducted with a view to determine the causes that have influence on falling accidents from the overall context and unearth the factors requiring management with priority. For this aim, "Fall from Height"(2003), a study by HSE, UK was applied to various conditions of korea as an experiment to search for fundamental causes for falling accidents. The major findings of this study might be summed up as exploring a main critical path that has influence upon falling accidents and suggesting effective ways to cut down through the critical path.
A Study on the Flexural Behavior of Concrete Using Non-burnt Cement
Yoo, S.W. ; Nam, E.Y. ; Lee, S.J. ; Hwang, S.B. ; Soh, Y.S. ; Kim, J.S. ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 49~56
If cement can be manufactured with industrial byproducts such as granulated blast furnace slag, phosphogypsum, and waste lime instead of clinker, there would be many advantages, including maximum use of these industrial byproducts for high value-added resources, conservation of natural resources and energy by omitting the use of clinker, minimized environmental pollution problems caused by CO2 discharge, and reduction of the production cost. By this reason, in this study, mechanical behavior tests of non-burnt cement concrete were performed, and elasticity modulus and stress-strain relationship of non-burnt cement concrete were proposed. 6 test members were manufactured and tested according to reinforcement ratio and concrete compressive strength. By the test results, there was no difference between ordinary concrete and non-burnt cement concrete of flexural behavior. In order to verify the proposed non-burnt cement concrete model, nonlinear analytical model was derived by using strain compatibility method. By the results of comparison between test results, ordinary concrete model and proposed model, The proposed model well predicted the flexural behavior of non-burnt cement concrete.
Optimal Design of Integrated Control System Considering Soil-Structure Interaction
Park, Kwan-Soon ; Park, Jang-Ho ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 57~64
For the vibration control of earthquake-excited buildings, an optimal design method of integrated control system considering soil-structure interaction is studied in this paper. Interaction between soils and the base of the building is simply modeled as lumped parameters and equations of motion are derived. The equations of motion are transformed into the state space equations and the probabilistic excitations such as Kanai-Tajumi power spectral density function is introduced. Then an optimization problem is formulated as finding hybrid or integrated control systems which minimizes the stochastic responses of the building structure for given constraints. In order to investigate the feasibility of the optimization method, an example design and numerical simulations are performed with tenstory building. Finally, numerical results are compared with a conventional design case that soil-structure interaction is not considered.
An Experimental Study of Fire Risk Characteristic by Extended Balcony of High-Rise Apartments in Fire
Kim, Woo-Suk ; Kim, Wha-Jung ; Lee, Gwang-Won ; Lee, Ji-Hee ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 65~71
Changes in the styles of communities are leading of increases in the number of high-rise apartments and commercial-apartment structures. Tall high-rise structures, while presenting unique economies of scale and cost effectiveness, tend to be highly engineered and complex structures. In the event of a fire, this complexity in design also results in a complexity in the behavior of fire propagation and control. High-rise structures are among the most potentially dangerous due to the high population density in the building, and the inherent limitations on evacuation and on fire control services. One of the most critical points of fire propagation is the movement of fire through the outer wall structures. Controlling such propagation is essential in controlling the spread of the fire throughout the building itself, as well as controlling the potential for its spread to adjacent buildings. In this study, we will be examining the potential for fire control design and effects mitigation using a 1/4.5 scale model. The primary focus of the study will be the effects of extended balconies into the structure of high-rise apartments. The authors will also consider the effectiveness of reduced-scale model tests.
Safety Management Information System in Roads Construction Work
Park, Jong-Keun ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 72~77
There are insufficient models that find problems and solutions for accident prevention through risk assessment and suggest safe work process and work instruction from foundation works to finish work for accident decrease. This paper presents a quantitative risk assessment model by analysis of risk factors in each process such as earth works, drainage works, pavement works, appurtenant works and etc based on accident examples and investigation on actual condition in roads construction work. In addition, the safety management system was developed to perform risk assessment of construction and use it for effective safety training for labor.
An Experimental Study on Internal Force By Using Fiber Rope Concrete Beam
Choi, Jae-Nam ; Jin, Sung-Il ; Son, Ki-Sang ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 78~83
This is a study to confirm how to improve and substitute the existing re-bar with other material such as a fiber rope, especially super fiber rope having much more strong tensile strength. 6(b) different fiber rope reinforced beam with a section of
have been made and tasted as variables designed in the study. The larger diameter of fiber rope, the more capacity of the beam, even though fiber reinforced beam are increased with ten(10)percent, each. Lower capacity of fiber-reinforced beam than normal RC beam has been analyzed theoretically and empirically, based on a lot of experiences of the same size beam test. Fiber rope-reinforced concrete beam does not have sufficient capacity than RC beam due to insufficient bonding capacity of fiber rope in concrete. It leads to decrease beam bearing capacity and crack around lower center of the beam. Therefore, bonding reinforcement of fiber rope beam such as pinning a triangles steel pin in each knot of fiber rope contributes to improving bearing capacity of fiber rope reinforcing beam.
Evaluation of the Pushing, Lifting and Twisting Forces According to the Handle Design Variables of the Single-Wheel Barrows
Song, Young-Woong ; Kim, Kyoung-Ah ; Lee, Ho-Cheol ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 84~91
This study evaluated three forces (lifting, pushing and twisting) required to maneuver the single-wheel barrows according to handle height, width, horizontal angle and vertical angle. The four independent variables were varied in two levels. Handle height was varies in two levels : 'knuckle height (KH)' and 'KH + 0.1
stature'. The two handle widths were '1.5
shoulder width (SW)' and '1.75
SW'. Two angles of
were used for horizontal and vertical angles. The 24 factorial design was used in the experiment. Twelve healthy male students (undergraduate and graduate) participated in the experiment. Subjects exerted three forces (pushing, lifting, and twisting clockwise) in each experimental condition. The order of 16 treatment conditions was determined randomly. Results showed that the effects of the four factors were different according to three forces. While lifting and twisting forces were higher in 'knuckle height', the pushing force was higher in 'KH + 0.1
stature' (p < 0.05). Lifting and pushing forces showed higher values in the horizontal angle
. Handle width and vertical angle showed no statistically significant main effects on three forces (p > 0.05). Results of this study could be used as basic data for the ergonomic design of handle variables of one- or two-wheel barrows.
Application of Risk Management for Dental Implants Based on ISO 14971
Yoon, Ji-Hoon ; Kim, Young-Jin ; Jeon, Gye-Rok ; Jeong, Chang-Mo ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 92~97
Risk management is the process that helps to identify hazards, analyze them, and then to create an action plan to avoid and mitigate these hazards. The main objective of risk management in product development and manufacturing is to provide safe and efficient products without spending too many resources. Medical device manufacturers also face enormous risks - regulatory, legal, and financial - based on their products and processes, and the concepts of risk management are particularly important because any single failure may result in serious damages to body or loss of life. In this regard, a set of guidelines for the application of risk management to medical devices has been issued by ISO and specified in the document ISO 14971 Medical devices - Application of risk management to medical devices. The main objective of this study is to investigate the application of risk management to dental implant development and manufacturing processes based on ISO 14971. A general risk management process is first introduced, and the application of ISO 14971 to dental implants is further investigated.
A Study on Driving Safety Evaluations Using Full Scale Crash Test Data of Curb
Kim, Jong-Min ; Noh, Kwan-Sub ; Kim, Jang-Wook ; Byeon, Ji-Seok ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 98~104
Current [Guideline for Installation and Management of Sidewalks and Safety Facilities on Roads] suggests that the types of curbs should be Barrier curb (
). Although Barrier curbs (
) were not specified in the guideline. The curbs installed on the roads currently are Barrier curbs (
) which are not specified in the installation standard. Therefore, it is critical to prepare for the installation standard of curbs by researching types of curbs and driving safety. This research have assessed the driving safety throughout Full Scale Crash Test according to type of curbs (Barrier curbs (
) and Barrier curbs (
)). Barrier curbs (
) showed higher figure in Theoretical head Impact Velocity, Post-impact Head Deceleration, Vehicle Damage when Crash, Passenger's Wounds Severity, and every other items than Barrier curbs (
). Barrier curbs (
) were found to have better Occupant Safety Index. Analysis of Behavior Using Full-Scale Crash Test showed difference depending on the Impact Condition between Barrier curbs (
) and Barrier curbs (
). Generally, Barrier curbs (
) were superior than Barrier curbs (
) in terms of protecting the passengers and vehicle damages. When an impact angle increases, Acceleration of Vehicle, Variations of Speed, and Contact Relationship between Wheels and Curbs, two types of curb showed similarity. However, if an impact of an angle decreases, Barrier Curbs (
) showed excellence in Driving Safety such as Acceleration of Vehicle, Variations of Speed, and Contact Relationship between Wheels and Curbs.
Traffic Accident Models of Domestic Rotary by Day and Nighttime
Park, Byung-Ho ; Lim, Jin-Kang ; Back, Tae-Hun ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 105~110
This study deals with the accident models of rotary. The objectives is to develop the models by day and nighttime. In pursuing the above, this study gives particular attentions to collecting the data of geometric structure and accidents of 20 rotaries and developing the Poisson and negative binomial regression models using NLOGIT 4.0. The main results are as follows. First, the numbers of accident of nighttime (1.03 per 1,000 entering vehicles) were analyzed to be very higher than those of day (0.47 per 1,000 entering vehicles). Second, 4 Poisson models which were all statistically significant were developed, in which the dependent variable were both the number of accident and EPDO (equivalent property damage only). Finally, the number of entry/exit (
) and the number of entering lane (
) in the models of the number of accident, and
in the EPDO models were adopted as the common variables. The variables were analyzed to be all positive to the dependent variables.
Traffic Accident Models of Urban Circular Intersections by Operational Type
Kim, Kyung-Hwan ; Park, Kil-Soo ; Park, Byung-Ho ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 111~116
This study deals with the traffic accidents of circular intersections in Korea. The purposes are to comparatively analyze the characteristics by operational type, and to develop the models using the data of 82 intersections. In pursuing the above, this study gives particular emphasis to modeling such the accidents as the roundabout and rotary in urban area. The main results analyzed are as follows. First, the null hypotheses that the number of accidents are the same in both the urban and rural intersections, and roundabout and rotary in urban area, were analyzed to be rejected. Second, 3 accident models were developed, which were all statistically significant. The independent variables used in the above models are the ADT, number of approach lane, bus stop, parking facilities, and others. This study could be expected to give some implications to the traffic safety policy decision-making.
A Study on the Analysis of Driver's Visual Behavior Characteristics according to the Type of Curve Radius
Song, Byung-Kun ; Lim, Joon-Bum ; Lee, Soo-Beom ; Park, Jin-Ho ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 117~126
Understanding driver's characteristic of visual activity is important process because driver depends on a visual signal more than 90% for getting outside information needed to drive, thus a series of driving, including perception, judgement, and activity, is completed. This study analyzes quantified driver's sight range in curved section where recognition of various information is critical due to biggest speed change among sections. Simulation is utilized for this study because of safety problem on field experiment and difficulties in using equipment. Building 6 roads that have different in curve radius by virtual driving map, experiment is carried out recruiting 30 people. Through analytical researches, it shows that drivers keep an eye on direction of driving, and driver's visual range is narrowed on left curve than right curve, and the more curve radius become small, the more drivers see in narrow angle.
A Study for Rationalization of Appointment Criteria to Laboratory Safety Managers in Universities and Colleges
Kang, Mee-Jin ;
Journal of the Korean Society of Safety , volume 27, issue 2, 2012, Pages 127~133
This paper shows survey result on safety management status of laboratories in Korea. In Korea, many studies and reports on laboratory safety have been published since the ministry of education, science and technology (MEST) enforced the Act on Establishing a Safe Environment of Laboratories (Lab Safety Act) in 2006. The MEST has surveyed status of safety management in institutions subject to Lab Safety Act in 2008 and 2010. According to the survey result, safety management status of universities and colleges has been improved on several factors such as establishment of safety manual and implementation of safety inspection; while the number of safety managers of universities and colleges have increased. However, the difficulties in performing duties of safety managers has increased because the number of exclusive safety managers has decreased. This paper identifies the similarities and differences between Occupational Safety and Health Act and Lab Safety Act on assignment and duties of safety managers; therefore, this paper suggests a standard to determine the number of safety managers and decide whether or not their duties should be exclusive. Besides current standard that is based on the number of researchers, the number of individual laboratories should be considered. The new method would be helpful to determine the number of exclusive safety managers because the amount of safety managers' duties generally do not depend on only the number of people who may be exposed to any risk but also the number of facilities that may be cause of any accident.