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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korea Academia-Industrial cooperation Society
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The Korea Academia-Industrial cooperation Society
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Volume & Issues
Volume 15, Issue 12 - Dec 2014
Volume 15, Issue 11 - Nov 2014
Volume 15, Issue 10 - Oct 2014
Volume 15, Issue 9 - Sep 2014
Volume 15, Issue 8 - Aug 2014
Volume 15, Issue 7 - Jul 2014
Volume 15, Issue 6 - Jun 2014
Volume 15, Issue 5 - May 2014
Volume 15, Issue 4 - Apr 2014
Volume 15, Issue 3 - Mar 2014
Volume 15, Issue 2 - Feb 2014
Volume 15, Issue 1 - Jan 2014
Selecting the target year
Measurement System for Vehicle Electric Power using LabVIEW
So, Soon-Sun ; Yang, Su-Jin ; Lee, Seong-Cheol ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5899~5905
DOI : 10.5762/KAIS.2014.15.10.5899
Faults in electric power system can be a critical problem for vehicles. The system durability is determined mainly by the durability of their components and operating conditions. Monitoring the conditions of the electric power system may be necessary because it is very difficult to predict precisely when it will fail. Therefore, the aim of this study was to develop a diagnosis system for an electric power system of a vehicle. The alternator voltage, excitation voltage, lamp voltage, battery voltage, and engine rpm from a crank angle sensor are monitored continuously and the system fault can be then detected in real time. NI USB- 9201 DAQ and LabVIEW SW have been used to measure the voltages and analyze the data. Compared to conventional measurements for only each component, an integrated and portable measurement method was developed. In addition to the monitoring the electric power system in real time, the saved data from the measurement also provides valuable information to improve the durability of the components.
Structure and Fatigue Analyses of the Inspection Equipment Frame of a Semiconductor Test Handler Picker
Kim, Young-Choon ; Kim, Young-Jin ; Kook, Jeong-Han ; Cho, Jae-Ung ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5906~5911
DOI : 10.5762/KAIS.2014.15.10.5906
Currently, there are many processes of package assembly and inspections of real fields that examine whether a manufactured semiconductor can be operated regularly and can endure low humidity or high temperatures. As the inspection equipment of a semiconductor test handler picker has been used at the inspection process, these inspection equipment frames were modelled in 3D and these models were analyzed using 3 kinds of fatigue loadings. As the analysis result, maximum deformation occurred at the midparts of the frames at cases 1 and 2. Among the cases of nonuniform fatigue loads, the 'SAE bracket history' with the severest change in load became the most unstable but the 'Sample history' became the most stable. Fatigue analysis result can be used effectively with the design of an inspecting equipment frame of a semiconductor test handler picker to examine the prevention and durability against damage.
Study of the effect of cleaning the intake manifold on common rail diesel engine and exhaust gases
Kim, Tae-Jung ; Hong, Sung-In ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5912~5918
DOI : 10.5762/KAIS.2014.15.10.5912
Owing to highly developed industries and the use of fossil fuels, environmental problems becoming becoming pressing issues globally. Therefore, a study of automobile exhaust is urgently needed. Generally, air is sucked into the engine through the intake manifold. The aims of this study were to reduce the exhaust from used cars and increase the output by removing carbon deposits, which are considered a reason for the increasing exhaust and reduction of output, and the reduction of exhaust, variation of output and stability of idle speed were analyzed. The formation of carbon deposits within the suction manifold was investigated through a test device (KD147). In the intake manifold, the exhaust cleaning effect was confirmed.
Development of a Cutting Support Cleaning System considering the Dross Adhesion Characteristics
Kim, Ho-Kyeong ; Ko, Dae-Eun ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5919~5924
DOI : 10.5762/KAIS.2014.15.10.5919
Accumulated dross adhered to the cutting support degrades the cutting accuracy and aggravates the working environment by reducing the efficiency of the dust collector. Furthermore, the cutting machine and product can be damaged by the scattering of molten metal. In this study, an attempt was made to increase the productivity of steel cutting process and improve the working environment by dross control. The dross adhesion characteristics were invested by a cutting experiment and the design concept for a dross removal machine was devised. Finally, a cutting support cleaning system and its operating algorithm were developed. The applicability of the developed system was examined and verified by a long-term field test after installation of the plasma arc cutting system of a shipyard.
Study of the Development for Qualification of Occupational Category Combined Working and Learning -Oriented toward Mold & die in Machine Field-
Kang, Seog Joo ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5925~5932
DOI : 10.5762/KAIS.2014.15.10.5925
The aim of this study was to develop assessment tools for analyzing society focusing on abilities, not an academic clique. The development of a type of occupational qualification, which is called a working and learning system, for Koreans, can be reliable and acceptable to a variety of society members. This study was conducted by searching for a dual system and examining a qualification system in developed countries. To achieve the goal of this study, the management status according to a type of qualification system was analyzed. In addition, a variety of related laws, related department, testing authority, testing institute, terms of applying for tests, way of testing, committee of testing, testing subjects, criterion for passing tests, a status of qualification test administrated in some developed countries, such as Germany, UK, the USA and Australia, were conducted. The occupational duty of the machine field and education contents are examined by analyzing the occupational duty. In addition, the criterion to solve problems and a way of marking in the field of machines were indicated and an example of written and practical tests is presented. This study makes a blueprint for a qualification system of working and learning at the same time in a national dimension.
Study of the welding monitor and characteristics according to a change in Gas mixture by FCAW
Lim, Byung-Chul ; Kang, Chul-Soon ; Park, Sang-Heup ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5933~5938
DOI : 10.5762/KAIS.2014.15.10.5933
In this study, the effect of varying the mixture gas during FCA welding was studied for an Atos 60 test piece. To examine the characteristics of welding, the weldability of the material was checked before welding and online monitoring was performed to examine the mechanical properties after welding. The mixture Ar 80% +
20% at low speed gave very elegant beads with very little spatter. 100%
gave rise to high spatter generation. For Ar 80% +
20%, the low current region due to the normal short circuits created spatter, which was more than double for 100%
. This peak distribution occurred due to the instability of the arc. The tensile test result for Ar 80% +
20%, Ar 90%+
100% at 511MPa, 507MPa, and 469MPa showed that the yield strength was improved by 8.1 and 8.9% for 80%+
20% and Ar 90%+
10%, respectively, compared to 100%
. The tensile test result at 622MPa, 609MPa, and 581MPa showed that the yield strength was improved by 7.0% for both the mixture gas compared to 100%
Study of Computational Fluid Dynamics for Projection Distance Prediction of the Foam Monitor
Ryu, Young-Chun ; Seo, Bu-Kyo ; Seung, Jung-Hyun ; Lee, Young-Hoon ; Park, Young-Chul ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5939~5944
DOI : 10.5762/KAIS.2014.15.10.5939
The foam monitor is equipment for extinguishing fires, particularly for oil tankers or cargo areas of the carrying vessel. This equipment is installed on the cargo tank deck. Generally, the projection distance is important for designing an extinguishment. On the other hand, the form monitors in current industry have been designed by trial and error rather than by numerical analysis method. Therefore, the shape design of the new form of monitor is needed. In this study, numerical analysis was performed to determine the projection distance prediction, and experiment results were used to make a comparison with the analysis results. The proposed method was applied to the modified form of a newly designed monitor in a company.
Agricultural support and solidarity devices development
Han, Seung-Chul ; Kim, Jin-Ho ; Lee, Man-Gi ; Lee, Seung-Cheol ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5945~5949
DOI : 10.5762/KAIS.2014.15.10.5945
The rural population is aging and farmers need to aim for mass production. This study examined the work efficiency of clamping and protecting crops. Strong winds are a risk for damage, but there are no reports of studies of the geometric design problem for vegetation. The accuracy of the simulation to obtain a load applied to the actual support and index was examined. The model was selected according to its strength based on the reliability of the simulation. Also acts in force of 0.1N to 0.6N, which can withstand the force of 1.29N with the results of this thesis research. The fixed clamp fixing for agricultural crops designed as a support was examined. These results are expected to help shorten working hours, and improve the growth of crops and disaster prevention.
FEM Analysis of Cleaning Machines by Design Change
Lee, Jong-Sun ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5950~5954
DOI : 10.5762/KAIS.2014.15.10.5950
FEM analysis of cleaning machine was performed. A cleaning machine was designed and measured to develop a cleaning machine with highly improved performance and a real configuration. 3D modeling was conducted using the 3-D design program CATIA V5. In addition, FEM analysis was conducted on the modeled cleaning machine using the ANSYS finite element analysis program and the pressure changes in internal fluid flow were visualized. This result was applied to the new product development of cleaning machines.
Optimal Design for Torsional Stiffness of the Tubular Space Frame of a Low-Cost Single Seat Race Car
Jang, Woongeun ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5955~5962
DOI : 10.5762/KAIS.2014.15.10.5955
Generally, the frame design of a vehicle is a critical technology that plays an important role in the racing and high performance sports car market. The high performance of race car frame means that it requires high torsional stiffness because it directly affects the cornering behavior of the race car. The optimal design for the frame of a low-cost single seat race car was carried out using the DOE (Design Of Experiments) with Taguchi's orthogonal array and FEM (Finite Element Method) analysis to secure sufficient torsional stiffness in this paper. According to the results by DOE and FEM analysis, the optimal design case produced improved 10.7% and 14.5% improvement in each stiffness-to-weight ratio and frame weight than in the early design step. Therefore, this paper shows that the optimal design with Taguchi's orthogonal array is very useful and effective for designing a tubular space frame of a low-cost single seat race car in the early design step.
Development of an impact test device for Light-weight Automotive Reinforcements
Kim, Ick-Tae ; Kang, Hyung-Sun ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5963~5967
DOI : 10.5762/KAIS.2014.15.10.5963
Reducing the impact of collisions of cars is a major issue for reducing the injury and death of passengers. According to the statistical data of the Road Traffic Authority, the deaths from side collision accidents caused by the collision of passenger cars is greater than the deaths from head-on collision accidents. To accommodate this, vehicle designers have added a reinforcing material called the impact frame and impact beam on the inside of the door. Many experiments are needed to develop the door impact beam. These reinforcements to develop a collision experiment is essential. Collision experiments are costly and time consuming. This study used a drop Impactor to obtain the impulse and a strain experimental device was developed for this purpose. The economic costs were reduced and the ideal experiment device configuration was determined. A comparison of the experimental results with numerical value analysis revealed
strain ranging from
Optimization of Gate Location Using Computer-Aided Injection Molding Analysis
Moon, Jong-Sin ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5968~5973
DOI : 10.5762/KAIS.2014.15.10.5968
The gate location in injection molding has a significant influence on the quality and productivity. Therefore, injection molding CAE is used to determine the gate location. With increasing injection molding CAE and the adoption of a 3D mesh, which takes more computation time for analysis, gate location optimization in the shortest time and least resources is the most challenging issue. In this paper, we propose a methodology for optimization based on the flow length to consider the flow balance and weld line. In addition, the flow balance is obtained in the disc-type plate while the weld lines exit the slit-holes to avoid a stress concentration.
Study of the Damage Property of a Contacted Indent by Finite Element Method
Cho, Jae-Ung ; Kim, Choon-Sik ; Lee, Hee-Sung ; Kim, Young-Choon ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5974~5979
DOI : 10.5762/KAIS.2014.15.10.5974
Lightweight parts with very uniform precision are manufactured by an indent method and the press technique has been improved. Upon assembly with an indent method, a deformation force due to the compressive force occurs between the pin and hole and the contact surface is affected by damage. Therefore, a 3 dimensional model was made using the CATIA program and the damage on the surface contacted with indent was estimated through the ANSYS program in this study. In the analysis result, the maximum load applied at the PCB plate was 21.3 N when the pin goes through the PCB plate. When PCB plate came out of the pin, the maximum load was 19.24 N. As the structural analysis result, the maximum equivalent stress of Pin 1 was 192.96MPa because the maximum stress occurs at Pin 1 among all parts of this study model. By examining the damage property of the contacted indent and applying this study result to the design of real indentation, the damage can be prevented and the durability can be estimated.
Study of the effects of injector cleaning on the exhaust gases in a common rail diesel engine
Cho, Hong-Hyun ; Kim, Tae-Jung ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5980~5987
DOI : 10.5762/KAIS.2014.15.10.5980
As a response to exhaust gas regulations, the electronic control system was applied to the diesel engine. The injected fuel mass and injection timing are accurately controlled using it, and the fuel efficiency and the engine output are significantly increased. In addition, the noise and the vibration of vehicles are decreased. To maintain the optimal performance of an electronic control diesel engine, it is important to control the fuel injection pressure accurately using the fuel pressure regulator. When the fuel pressure regulator is not worked normally, the failure phenomena (starting failure, staring delay, accelerated failure, engine mismatch et al.) occurred because the fuel pressure is not stabilized and controlled accurately. In this study, the effects on a fuel pressure, return fuel mass flow, and engine rotating speed according to the control rate of fuel pressure regulator were investigated to analyze the performance variation under the failure conditions of a fuel pressure regulator. As a result, when the control rate of a fuel pressure regulator decreased by 4%~6% compared to that of the standard condition, the variation of engine rotating speed and return fuel flow were increased greatly, and the abnormal condition occurred. In addition, it is possible to diagnose the failure of a fuel pressure regulator by monitoring these conditions.
Effect of Dubbing on the Ticket Power of Animation Movies
Park, Ju-Yeoun ; Shin, Hyung-Deok ; Kwon, Kyoung-Min ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5988~5994
DOI : 10.5762/KAIS.2014.15.10.5988
This study examined the effects of dubbing on the ticket sales of foreign animation movies put on the screen in Korea in the context of 'Skopos Theory'. The ticket power of animation increased when dubbing was chosen as the translation strategy. Moreover, the effects were greater when the animation was in the peak seasons, classified as non-restricted, and made in non-US countries. The ticket power was also found to be greater when celebrities joined in the dubbing. This finding was consistent with the 'Skopos Theory', which implied that dubbing is superior to captioning for audience understanding and audience attraction. This study confirmed empirically the positive effects of dubbing on the performance of foreign animation movies, which is the contribution to the literature that has been limited on case studies. These results also suggest that a dubbing strategy should be consistent with its target audience.
Study of Verification of Effect on the Environment Education Program for Children
Yoo, Hyesook ; Gang, Seonghyeon ; Kim, HyunRan ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 5995~6003
DOI : 10.5762/KAIS.2014.15.10.5995
This study was performed to determine the recognition change and the effect of the experiential environment education on children and to obtain basic data for establishing an environmental education program appropriate for children based on the results. The subjects of this study were 200 kindergarten students and 200 mothers in Gu-mi,Gungbuk. The environment education program was applied to the kindergarten students, and their mothers observed the changes in the environmental living attitude and responded to the research tools. As a result, the environment education program improved the children's environmental living attitude. On the other hand, the effect cannot be observed in a short period. Continuous efforts will be needed and experiential environment education is very useful. In the sub-domain, the effect was high in the order of recycling, saving and prevention of environmental pollution. The effect on girls was higher than on boys, and the effect on six-year-children was higher than that of four-year-children. This study is significant in that it verifies how environmental education programs and activities have a positive influence on the establishment of children's behavioral, cognitive characteristics and their perception of the appropriate environmental knowledge.
Impacts of Resource Attributes on Resource Sharing: An Approach from Resource-based View
Hwang, Jaewon ; Park, Kyoungmi ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6004~6013
DOI : 10.5762/KAIS.2014.15.10.6004
The research on resource sharing in the diversification field is concerned mainly with sharing, but there has been little interest in resources. This research examined resource sharing with the main variables and logics of resource-based view. Based on a survey of 263 affiliates of 35 diversified firms, the impacts of resource quantity, resource quality, and resource exploitability on inter-affiliate resource sharing were hypothesized and verified. To confirm the performance implications of resource sharing, the impacts of the combination of resource quantity and resource sharing, the combination of resource quality and resource sharing, and the combination of resource exploitability and resource sharing on the affiliate performance were also hypothesized and verified. According to the empirical results from multiple regression analyses, resource sharing increases in the order of low resource quantity, high resource quality, and high resource exploitability. The performance was advanced in resource sharing under a low resource quantity and resource sharing under high resource exploitability, but it was not advanced in resource sharing under high resource quality. The results highlight the need for a further study on why the resource quality and resource exploitability affect resource sharing in the opposite directions, as expected in the hypotheses, why resource sharing under high resource quality does not lead to high performance, even though resource quality increases resource sharing, and what they would be if resources are subdivided by the types.
Comparative study on the language anxiety levels and factors in different English class environments
Cha, Haekyung ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6014~6028
DOI : 10.5762/KAIS.2014.15.10.6014
This study examined the levels of language anxiety and their causal factors in different English class environments. The findings show that the levels of language anxiety vary significantly in different types of class environments, indicating that both the class environments and individual characteristics are meaningful variables of language anxiety. The findings also show that unlike the levels of language anxiety, its causal factors are almost constant regardless of the class environment with communication apprehension being the most important factor. This study suggests that the English proficiency of students and professors needs to be considered when constructing specific class environments, in addition to promoting class environments favorable to students' active participation in class.
Analysis of the Relationship between Employee Benefits Spending and Business Performance -Focused on KOSPI-
Oh, Jung ; Lim, Eung-Soon ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6029~6035
DOI : 10.5762/KAIS.2014.15.10.6029
This study examined the Efficiency Wage Hypothesis. For this study, the time series data of 171 companies was checked carefully from 2000 to 2011 to determine the relationship between employee benefits spending and business performance. Advanced research showed that the employee benefits affect the corporate performance. On the other hand, they did not examine whether the employee benefits can be one the factors affecting business performance. Therefore, causality analysis of employee benefits spending and business performance was performed. This study shows that employee benefits spending can be a factor of the business performance.
Effects of the Social Capital of individual Civil Servants on the Efficiency of Public Service - Focus of civil servants in Jeju province
Kim, Il-Soon ; Hwang, Kyung-Soo ; Ko, Kwan-Woo ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6036~6045
DOI : 10.5762/KAIS.2014.15.10.6036
This survey research was performed to determine the social capital that public officials generate within the relationship of the community at the individual level by performing their public office work as an administrative duty. To this end, a survey was conducted on 500 civil servants in Jeju province. The survey period was May 19-23, 2014. 476 subjects were analyzed using a T-test, One way ANOVA, and multiple regression analysis to on SPSS 19.0Win software. As a result of the analysis, 1. The norms of the community cultural, male staff participation and cooperation, and social capital level of civil servants, showed a significantly higher association than female civil servants. There was a difference between the populations of registration to an association to the work location type. In addition, the social capital increases generally as the level of the officers increases. 2. The sub-category in the social capital of a personal level on civil servants family & associates trust, participation & cooperation and neighbor trust had a positive impact on the efficiency of public services. On the other hand, community cultural associations (network) did not have an influence on efficiency.
Study of the Factors Influencing the Economic Retirement Preparation for People Living with Disabilities Based on Andersen's Behavioral Model
Kim, Jin-Mi ; Lee, Youn-Ju ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6046~6055
DOI : 10.5762/KAIS.2014.15.10.6046
The present study identified the factors of economic retirement preparation for people living with disabilities using the Andersen's behavioral model. The 2012 Disabled Employment Panel Survey data were collected from May 21, 2012 to July 31, 2012 and were analyzed by applying the SPSS 20 program. Logistic regression analysis was carried out on a sample of 2,869 people aged 30 to 60 years. The predisposing factors (education, marital status), possibility factors (employment, non-basic livelihood security recipient status, homeowner status, income), and desire factors (subjective socioeconomic status, life satisfaction, self-esteem) affected the retirement preparation. To help people living with disabilities, policies and programs based on the factors that reflect the individual needs must be established.
Study on Developing the Scale of Korea Citizen's Intentionality out of Inborn Ability and Mission
Sohnn, Jou-Hwan ; Ha, Kyu-Soo ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6056~6065
DOI : 10.5762/KAIS.2014.15.10.6056
The aim of this study was to develop a scale of the Korea citizen's intentionality out of their inborn ability and mission. To set up the concept of the above intentionality, there have been many academic and religious studies for reference in addition to the existing productivity, Korea elderly successful aging scale, and the scale of life qualities for review. The first 57 items for questionnaires were created thereafter. The final 27 items were confirmed, which were constantly modified by a professor of statistics and corresponding author in effective response and in removing the redundant items after the first items had been reduced to 44 preliminary items through the many an item-by-item discussions with pastors, theologians and social workers. A survey was conducted around the metropolitan area and 380 records were collected. Factor analysis to verify the validity of the measurement tool was completed, and showed that there were 6 sub-factors; "recognition of being", "autonomous life", "self-completion", "initiative", "acceptance", and "economic feasibility". In addition, reliability analysis was implemented and found to be reliable because the Cronbach's
value was 0.6 or more.
Analysis of the Productivity Changes in Government-funded Research Institute for Economies & Humanities and Social Sciences
Jeon, Seong-Wook ; Kim, Seong-Jong ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6066~6075
DOI : 10.5762/KAIS.2014.15.10.6066
The aim of this study was to analyze the productivity changes in government-funded research institutes for Economics & Humanities and Social Sciences. From Malmquist total factor productivity index analysis, the average productivity decreased 6.5% between 2006 and 2010. Further analysis showed that technical efficiency increased 4.7% annually while the technology change rate decreased 10.8% on average. Under pressure for innovation from the outside, research institutes responded to managerial efficiency improvement, which lead to increases in technical efficiency. On the other hand, for productivity improvement of government funded research institutes, they must pursue technological advances by securing an outstanding research workforce, expanding the R&D budget, and changing the R&D method. Each institute must perceive the cause of an individual institute's productivity change, and establish strategies for increasing productivity.
Irrecoverable Service Failure and Typology of Service Recovery
Yoon, Sung-Wook ; Seo, Mi-Ok ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6076~6083
DOI : 10.5762/KAIS.2014.15.10.6076
Service recovery research has been conducted on the premise that service problems can be returned to the original condition. This study, however, focused on irrecoverable service problems for the first time and classified them according to the types and sub-types. The specific wants of customers who experienced unrecoverable service problems were identified by analyzing the customers' emotion, behavior pattern, and the company's responses. The results revealed three main types of problems and 2 categories in group 1, 6 categories in group 2, and 2 categories in group 3. In particular, damaged items and bodily harm were frequent problems, and bodily harm was recognized as the most severe failure. Regarding the customers' emotion, the customers were so enraged at the audacity and the company still showed many problems in terms of its response to the service failures. This study also suggested the analysis results of the customers' behavior and company evaluation.
Influences of Volume Volatilities on Price Volatilities in the Fishery Market
Ko, Bong-Hyun ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6084~6091
DOI : 10.5762/KAIS.2014.15.10.6084
This paper presents the GJR GARCH model (Glosten et. al, 1993) to analyze the influences of volume volatilities on price volatilities in the fishery market. For the analysis, this study used the monthly price and volume data of aquacultural flatfish in Jeju. As a result, empirical analysis suggested volatility clustering. The persistency parameter(
) was estimated to be approximately 1 in aquacultural flatfish. The results showed that there is a significant negative relationship between the conditional variance of supply and that of price for aquacultural flatfish. This means that the general law of supply is valid. Finally, the empirical analysis was that an asymmetric coefficient (
) of GJR GARCH model was negative (-). This means that the higher volatility of volume leads to lower price volatility. That is, it is useful to make government policies that can adjust the volume (stockpiling, stabilizing supply and demand).
Study Based on Grounded Theory about Job Experience of Visiting Supervisors for Multicultural Families
Lee, OBok ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6092~6101
DOI : 10.5762/KAIS.2014.15.10.6092
This study examined the job experience of visiting supervisors for multicultural families. To achieve the goal of this study, data was collected by in-depth interviews with 7 visiting supervisors for multicultural families. For an analysis of the data, the grounded theory approach by Strauss and Corbin  was employed. The results of an analysis of the categories are detailed below. Through an open coding process, a total of 124 concepts, 33 subcategories, and 13 categories were produced. The central phenomenon was 'uncertain employment '. From the axial coding, the causal conditions were 'employment for economic reasons' and 'frequent policy and regulation changes'. The contextual conditions were 'uneasiness about the evaluation result', 'unilateral work instruction system', and 'little improvement of treatment'. Intervention conditions were 'high level of satisfaction with work', 'handy source of income', and 'no other alternative'. Action/interaction strategies were 'efforts for contract extension' and 'receptive attitude'. The consequences were 'hope to retain employment' and 'agonizing over their rights'.
Empirical Study on the Factors Impacting on Supervisee's Satisfaction in Coaching Supervision
Kim, Yong-Ku ; Chae, Myung-Sin ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6102~6113
DOI : 10.5762/KAIS.2014.15.10.6102
This is an empirical study of the factors impacting on supervisee's satisfaction on coaching and supervision in Korea. The study set four independent variables (supervisor, supervisee, contents, and organization), a moderator variable (relationship between the supervisor and supervisee) and a dependent variable (supervision satisfaction) based on the theoretical background on supervision. The data was collected from a survey of 112 certified coaches who had experienced supervision. As a results of the hypotheses tests, the supervisor and organization factors affected the supervision satisfaction. The relationship between the supervisor and supervisee moderates the impact of the supervisor and supervisee on the supervision satisfaction. They reported that the effectiveness of the coaching supervision in Korea was strongly dependent on the supervisors. These results were attributed to the short history of the coaching supervision and the lack of experience related to it. They also suggested that a great deal of research on coaching supervision will be needed to develop a clear identity/framework of coaching supervisor and its methods.
Study on Controlled Horticulture Farmers' Attitude of Energy-Saving Facilities using the IPA method
Kim, Yean-Jung ; Han, Hye-Sung ; Choi, Chil-Koo ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6114~6125
DOI : 10.5762/KAIS.2014.15.10.6114
This paper analyzed the issues related to focus on farmers behaviors of energy saving facilities. This study conducted questionnaire and field surveys of controlled horticulture farmers and economic analysis using an IPA(Importance-Performance Analysis) matrix. According to the research results, the performance level was low on average ranging from 2.33 to 2.56 in a five point Likert-scale on greenhouse mandarin and grape-related facilities. On the other hand, the importance levels were high in the mean rating from 2.69 to 4.8. The results show that energy loss reduction of complementary facility and alternative energy supply support for low cost implementation are more important in terms of the respondents concerns than performance quadrant III. Therefore, it is important to provide financial support to energy-saving facilities to promote the use of energy efficiency improvement. In addition, the government should invest continuously in research and development.
Effect of Simulation-based Core Skill Program (SCSP) on clinical knowledge, problem solving process and self-esteem in Health-related department students
Cho, Hye-Young ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6126~6133
DOI : 10.5762/KAIS.2014.15.10.6126
This study examined the effects of a simulation-based core skill program regarding emergency care on the knowledge, problem solving process and self-esteem of health related department students. A quasi-experimental non-equivalent control group pre-post test design was used. A total of 46 students, 23 students for the experimental group and 23 students for the control group, were enrolled in this study. The simulation-based core skill program included lectures, skill training, team-based practice, simulation and debriefing. This was implemented in the experimental group for 3 weeks in May, 2013. The data was analyzed using the frequency, ratio, Chi-square, and t-test by the SPSS/Win 18.0. The experimental group, who had a simulation-based core skill program, showed significantly higher clinical knowledge, problem solving process and self-esteem compared to the control group who had a traditional education. A clinical simulation-based core skill program was verified to be an effective teaching method to improve on the clinical knowledge, problem solving process and self-esteem of health-related department students.
Study of the relationship between filial piety and communication with parents in accordance with the general characteristics of teenagers
Kim, Hwang-Ki ; Cho, Sung-Je ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6134~6141
DOI : 10.5762/KAIS.2014.15.10.6134
This study analyzed the gap in perception between communication with parents and filial piety according to the general characteristics of teenagers. The test subjects were high school students from academic and vocational school from different districts of Seoul. A survey was conducted from March to July of 2014 to 290 high school students. Data analysis was conducted on the SPSSWIN 18.0 program using a t-test, one-way analysis of variance, correlation analysis, and other tests. The empirical analysis of the experiments were verified at the significance level of 5%. First, communication with fathers differed significantly depending on the school division, economic class, religion; and communication with mothers differed significantly depending on school division, grade-level, academic performance, domestic discipline, and economic class. Second, the perception of filial piety showed a significant positive correlation with the communication with the mother; and with the communication with the father. The implication of this study is that better communication between the parents and teenagers correlate with the higher filial piety according to the general characteristics of teenagers, and should become a central material for policy.
Influence of Psychological Well-being and Emotional Expressiveness in Middle School Students on their Peer Relationships
Kim, Young-Hee ; Koh, Tae-Soon ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6142~6149
DOI : 10.5762/KAIS.2014.15.10.6142
This study examined the middle school students' psychological well-being, emotional expressiveness and peer relationships according to sex, and the relationships among them. The participants of this study were 391 second grade students at a middle schools located in Gyeonggi-do. The collected data were analyzed using a t-test, Pearson's correlation analysis and stepwise multiple regression analysis. The results were follows: First, there were significant differences in the psychological well-being, emotional expressiveness and peer relationships according to sex. Female students had higher levels in all variables than male students. Second, there were significant relationships among psychological well-being, emotional expressiveness and peer relationships. In addition, psychological well-being and positive emotional expressiveness, negative expressiveness in the sub-factor of emotional expressiveness were significant predictors of peer relationships. These findings provide suggestions regarding the plan to improve middle school students' peer relationships.
Relevance of the personal characteristics of adolescents using a BMI study
Kim, Eun Yeob ; Kim, Seok Hwan ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6150~6157
DOI : 10.5762/KAIS.2014.15.10.6150
This study evaluated the perception, school stress, psychological factors, and association of students in middle and high school groups in terms of their BMI (Body Mass Index). The '2010 Korea Youth Health Survey 'was used to study data 7187 people. The subjects were classified into the underweight group (BMI < 20), normal group (BMI 20 - 24), overweight group (BMI of 25-29), and obese group (BMI of 30 or higher). The subjects found to have experienced smoking were as follows: underweight BMI group (17.2%), normal weight group (18.4%), overweight group (21.8%), and obese group (25.8%) (p=0.016). The level of satisfaction was as follows:
for the normal weight group,
for the overweight, and
in the obese group. The normal-weight group had a higher level of satisfaction (p=0.005). Underweight, normal, overweight, and obese BMI group were at school for an average of
hours per week, respectively (p=0.044). Therefore, the development of social misfit youths needs to be managed properly and effectively to improve their physical and mental health. Industry, academia and government need to collaborate with programs to achieve this aim.
Comparative Research on the Health Information Manager(HIM) Duties of One Malaysian Hospital and Similar Scale Korean hospitals
Kim, Hey-Kyung ; Lee, Hyun-Ju ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6158~6167
DOI : 10.5762/KAIS.2014.15.10.6158
The aim of this study was to perform comparative analysis of the duties of 7 new roles of HIMs in Malaysian and Korean hospitals of a similar scale. A Malaysian general hospital with a scale of 272 hospital beds was chosen. The researcher visited a Malaysian hospital in person and interviewed the staff in charge over a 2 week period from July 22nd 2013 to August 2nd 2013. For domestic hospitals, 13 general hospitals with 270 hospital beds, similar to the Malaysian general hospital, were chosen. Phone interviews with the department recorded the duty recording work. Regarding 7 new roles of Health Information Manager (HIM), although the role as a Health information manager and Security Officer in Malaysian general hospital was not defined, 30.8% performed their role in Korean general hospitals. The classification of disease & procedure within the role of Clinical data specialist was performed by both countries, and while the tumor registry was done in a Malaysian general hospital, only 15.4% of Korean general hospitals were operating. The statistics of the discharged patients were not measured in the Malaysian general hospital but 76.9% of Korean general hospitals recorded these statistics. Although 22.1% of Korean general hospitals operated registration work of special disease, Malaysian general hospital not only had a total legal contagious disease registration, but also took charge of information registration of hospital births and deceased ones. Other than these, the Patient Information Coordinator, Data Quality Manager, Document and Repository Manager, Research and Decision Support Analyst roles were not done by either country. The new role of HIM is operated in a low percentage in Korean middle and small hospitals. Therefore, to clearly establish the role of HIM in Korea, and have middle and small hospitals to operate such a role, it is essential for the related association to give continuous education and provide support to clarify the role within the hospital working environment. It is desirable to benchmark Malaysian general hospital's registration work on special diseases and others, and expand the work to improve overall.
Relationship between Depression and School Achievement in Elementary School Students
Park, Hyunju ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6168~6175
DOI : 10.5762/KAIS.2014.15.10.6168
Several studies regarding the effects of academic achievement on mental health problems have been conducted in adolescents but not in elementary school students. Therefore, the aim of the current study was to examine the effects of school achievement on depression in Korean elementary school students. The participants were 1,048, 5th to 6th elementary students in Seoul, Korea. The Spearman correlations between school achievement and depression were -0.31 for boys and -0.37 for girls (p<0.001 for both). After controlling for grader, the family economic status and self-esteem, higher achiever group showed a significantly low risk for depression in boys and girls. This study suggests that the lower school achievement is associated with a depressive mood in Korean elementary students. Therefore, students with lower academic performance are a risk group for depression.
Learning Motivations, Academic Self-Efficacy, and Problem Solving Processes after Practice Education Evaluation
Kim, Yeong-Hee ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6176~6186
DOI : 10.5762/KAIS.2014.15.10.6176
This study was designed to clarify the learning motivations, academic self-efficacy, and problem-solving processes in the educational evaluative method in the fundamental nursing practice using moving pictures. The learning motivations and academic self-efficacy showed statistical differences based on the students' motivations of selecting, their satisfaction with the major and nursing practice, helpfulness of moving pictures, and the suitability of practical tests using a checklist. Problem-solving processes revealed statistical differences based on the students' motivations of selecting the nursing department, their satisfaction with the major and fundamental nursing their satisfaction with the major and nursing practice, the helpfulness of moving pictures, and the suitability of practical tests using a checklist. The learning motivations showed significant positive interrelations with the academic self-efficacy and problem-solving processes. In conclusion, the educational evaluative method in the fundamental nursing practice using moving pictures was related to the nursing students' learning motivations, academic self-efficacy, and problem-solving processes.
Evaluation of the reduced scalp dose at Volumetric Modulated Arc Therapy(VMAT)
Kim, Jeong-Ho ; Bae, Seok-Hwan ; Kim, Ki-Jin ; Yoo, Se-Jong ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6187~6192
DOI : 10.5762/KAIS.2014.15.10.6187
The use of WBRT(whole brain radiation therapy) has increased due to the increase in the incidence of metastatic brain tumors. The development of radiation therapy techniques is expected to improve the quality of life. The VMAT (Volumetric Modulated Arc Therapy) is an excellent treatment technique that can distinguish the dose in each volume. Therefore, this study compared conventional WBRT and VMAT for hair loss according to the scalp dose using a head phantom. The CI (Conformity Index), HI (Homogeneity Index) and QOC (Quality of Coverage) were measured brain tissue. A 20 percent and 50 percent dose was measured at the scalp, eyeball, lens, and c-spine. Conventional WBRT is excellent at 10 percent of brain tissue. VMAT is far superior at 1000 percent at the other organs. VMAT at the prescribed dose can be used as radiation therapy of metastatic brain tumors with less hair loss.
Quality of Sleep and its Associated Factors among Male Workers in Small-scale Manufacturing Industries
Park, Eui-Soo ; Shin, Eun-Sook ; Cho, Young-Chae ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6193~6203
DOI : 10.5762/KAIS.2014.15.10.6193
This study was conducted to determine the quality of sleep, and its association with the sociodemographic characteristics, health-related characteristics, and job-related characteristics among male workers in small-scale manufacturing industries with fewer than 50 members. A self-administered questionnaire was distributed to 856 male workers from April
, 2011. The survey items included the variables of sociodemographic, health-related, job-related, and quality of sleep. As a result, the quality of sleep according to the PSQI of the study subjects revealed 32.0% to be good and 68.0% to be poor. The quality of sleep assessed by hierarchical multiple regression analysis was significantly lower in the married group, those with lower BMI, and those with a lower level of subjective health status, non-smoking, alcohol drinking, without regular exercise, coffee drinking, blue color, had a longer of working hours, subjective health status, had a visiting out-patient department, and had a history of hospitalization. With the above model, the job characteristics had 13.1% explanatory power. This suggests that the quality of sleep (PSQI) has more power when combined with the job characteristics.
Effects of Preceptorship on Nursing Students' Clinical Competency, Stress of Clinical Practice, and Practice Satisfaction in Clinical Practice
Hong, Sung-Jung ; Kim, Eunhee ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6204~6214
DOI : 10.5762/KAIS.2014.15.10.6204
This study examined effects of preceptorship in a clinical maternity nursing course. The study design was a quasi-experimental, nonequivalent control group post-test design. The control groups (n=70, from July to October, 2012) participated in traditional practice method and the experimental groups (n=70, from December, 2012, to February, 2013) participated by a preceptor who attended a systematic preceptor education program. The data analyzed included the numbers, percentages, mean, standard deviation, and t-test using SPSS 19.0/WIN. In the experimental group, the clinical competency and practice satisfaction showed significantly higher scores, and the stress of clinical practice showed significantly lower scores than control group. Consequently, the preceptorship was effective in clinical maternity nursing education for student nurses and it is necessary to adapt this many areas in the clinical nursing education field for nursing students.
Anti-Cancer Effect of Gallic Acid in CT-26 Cells Inoculated Cancer Bearing Balb/C Mice
Lee, Jung Hee ; Choi, Hwa-Jung ; Kim, Pom-Ho ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6215~6222
DOI : 10.5762/KAIS.2014.15.10.6215
This study examined the anti-cancer activity of gallic acid(GA) isolated from P. suffruticosa. was analyzed by ESI-MS,
-NMR. The anti-cancer activity was evaluated by measuring the cancer size in CT-26 cancer-allograft mice treated with GA(100 mg/kg p.o) for 14 days. The change in body weight, acute toxicity, weight change of the liver and spleen and biomaker of the liver were evaluated in the mice after the GA treatment. As a result, the cancer size of the CT-26 cancer-allograft mice treated with GA decreased significantly compared to that of the cancer mice without significant changes in weight loss (p<0.05) and acute toxicity. The weight of the liver and spleen and ALT, AST and LPO levels increased by cancer were decreased significantly after the GA treatment, and the GSH levels decreased by cancer were increased significantly with the GA treatment (p<0.05). Therefore, GA could be an attractive lead for the development of anticancer agents.
Comparison of the Health Behaviors according to Income and Education Level among Cardio-Cerebrovascular Patients; based on KNHANES data of 2010-2011
Choi, Ji-Yeon ; Choi, Seong-Woo ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6223~6233
DOI : 10.5762/KAIS.2014.15.10.6223
The aim of this study was to help disease management and prevention by analyzing the effects of income and education levels on the health of cardio-cerebrovascular patients. Using the raw data of 2010-2011 Korea Health & Nutrition Examination Survey, the correlations of health behaviors, general (socio-demographic) characteristics, body measurements, and blood test results of 3,687 cardio-cerebrovascular patients aged 30 or older were analyzed based on their income and education levels. The results suggested that lower income and education levels were correlated with a high prevalence of cardio-cerebrovascular diseases. In addition, the OR values (95% CI) of current smoking were 0.71 (0.52-0.96) for patients with a high-income and 0.41 (0.29-0.58) for those with a high level of education, showing a strong correlation between lower levels of income and education and current smoking, which is related to health deterioration. In terms of one-month drinking and high risk drinking, the OR values (95% CI) of the patients with a high income were 1.55(1.22-1.95) and 1.42(1.11-1.82), respectively. Drinking was more prevalent among high-income patients but had no correlation with the education level. The practice of walking had no significant correlation with both income and education levels. Therefore, it is imperative to emphasize the importance of temperance to high-income patients, and the importance of quitting smoking to low-income patients, as well as to provide institutional support.
Modeling Study of Development of Dying Well Education Program for the Medical Personnel in Korea
Kim, Kwang-Hwan ; Kim, Yong-Ha ; Ahn, Sang-Yoon ; Lee, Chong Hyung ; Hwang, Hye-Jeong ; Lee, Moo-Sik ; Kim, Moon-Joon ; Park, Arma ; Shim, Moon-Sook ; Song, Hyeon-Dong ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6234~6241
DOI : 10.5762/KAIS.2014.15.10.6234
The purpose of this study was to examine the status of medical staff stress and accommodating manners on the death of patients in a hospital setting for serving the basic information to develop a death education program of medical personnel from April 1 to April 30, 2014. A survey was performed on 353 medical personnel at K university hospital, located in Daejeon metropolitan city. Frequency analysis, chi-square test, and independent t-test were used to analyze the data. The results showed that 'to understand the value of the time and preparedness of a meaningful future' were the most important perspectives on the contents of death education (p<0.05), 'in order to change perceptions and attitudes toward death positively' was the most important reason why they required death education'(p<0.05), 'case-based teaching and problem-based learning' was the most effective way of death education (p<0.05), 'negative or hostile response of a patient's guardian to medical personnel' was the largest stress that medical personnel confront upon witnessing a death'(p<0.05). An understanding of the death of patients by medical personnel and an awareness of the need for death education will help improve the understanding of the patient, their guardian, and medical personnel themselves. The main findings will contribute to the development of a specific death education program on the medical personnel in a hospital setting.
Relation of the Physical Performance and Fear of Falls of the Elderly
Yun, Eun-Suk ; An, Jisook ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6242~6249
DOI : 10.5762/KAIS.2014.15.10.6242
The aim of this study was to determine the physical performance and fear of falls in the community dwelling elderly and to investigate how the factors were connected to one another. The data was collected between January 3rd and March 30th, 2014 from 460 elderly people, aged 65 or older, who agreed to participate in this study. The data was sampled among the elders' assistants as a way of responding to the questionnaire after being read. The study scales were composed of the demographic characteristics, physical function and fear of falls. A total of 139 (30.2%) subjects had experienced a fall. The results showed a positive correlation with the chair rise, standing on the leg, pick up a penny from floor, timed up and go test, and fear of falls. Multiple linear regression analysis showed that a predictor of the fear of falls were chair rise and timed up and go test. A combination of physical performance accounted for 16.9% of the fear of fall. Based on the findings of this study, it is useful to more effectively develop fall prevention and intervention programs in a future study.
Middle-aged Women's Health-related Preparation for Elderly Life - On centering culture centers in Daegu-city
Bae, Yun-Jo ; Kong, Soon-Hee ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6250~6257
DOI : 10.5762/KAIS.2014.15.10.6250
This study examined the preparation for elderly life in terms of health for aging and the related factors in the community (part of Daegu). The data of 391 middle-aged women in this study were collected from 4 culture centers. The interviews were conducted from March 1 until March 25 in 2011 using a structured questionnaire. The data was analyzed by descriptive statistics and logistic regression analysis using the IBM SPSS Statistics 20 program. The variables in preparation for elderly life regarding their health were exercise, good nutrition, proper sleep, and health examination. From the data, the preparation for elderly life regarding middle-aged women's health for successful aging was identified. Therefore, health service programs and healthy environment should be varied based on the result of this study.
Design of a LDC Recycling Load Tester for Hybrid and Electric Vehicles
Lee, Choon-Il ; Hong, Yeon-Chan ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6258~6263
DOI : 10.5762/KAIS.2014.15.10.6258
The LDC (Low Voltage DC-DC Converter) used for hybrid vehicles and electric vehicles was utilized to supply the electric apparatus load with a voltage and to charge the auxiliary batteries by receiving a high DC voltage from the high voltage battery. The LDC has a long-time load test during the manufacturing process. On the other hand, it has the disadvantage of considerable energy consumption because it has the structure to release the power as 100% heat during a load test. Therefore, in this paper, a recycling load test method was proposed and 75~90% energy saving was realized.
Study of the Technical Regulation of Radio Equipment about Ultra Wide Band
Kang, Young-Jin ; Kim, Sun-Yeob ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6264~6269
DOI : 10.5762/KAIS.2014.15.10.6264
This study examined the state of the UWB frequency band of foreign policy for application to domestic findings. The results confirmed that the UWB frequency can be prescribed mainly for use in a communication service area, unlike foreign countries, such as the United States and Europe for the current technology standard. On the other hand, the expansion of the UWB service area to various fields may appear as interference in the domestic industry protection and enable these rules. Therefore, the UWB frequency should be used in other areas except for broadcast and communication, if the output meets the specified criteria, as in the case of a foreign country. This is thought to be helpful for protecting the domestic industry and activated services.
Study of the Reduction of Torque Ripples for Multi-pole Interior Permanent Magnet Synchronous Motors using Rotor Saliency
Kim, Ki-Chan ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6270~6275
DOI : 10.5762/KAIS.2014.15.10.6270
The paper reports an improvement method on torque ripples of multi-pole interior permanent magnet synchronous motor (IPMSM) applied to a traction motor for hybrid electric vehicles. In the case of multi-pole IPMSM, the magnetic flux generated by a permanent magnet tends to leak through the bridge of the rotor without a link with stator windings. The slit design on the rotor surface was proposed to reduce torque rippling and increase the output power by reducing the leakage flux. Two design parameters for the slit are suggested for optimal design using the response surface method. As an analysis method, the 2D finite element method (FEM) was applied to consider magnetic saturation effect.
Improvement of the GA's Convergence Speed Using the Sub-Population
Lee, Hong-Kyu ; Lee, Jae-Oh ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6276~6281
DOI : 10.5762/KAIS.2014.15.10.6276
Genetic Algorithms (GAs) are efficient methods for search and optimization problems. On the other hand, there are some problems associated with the premature convergence to local optima of the multimodal function, which has multi peaks. The problem is related to the lack of genetic diversity of the population to cover the search spaces sufficiently. A sharing and crowding method were introduced. This paper proposed strategies to improve the convergence speed and the convergence to the global optimum for solving the multimodal optimization function. These strategies included the random generated sub-population that were well-distributed and spread widely through search spaces. The results of the simulation verified the effects of the proposed method.
Study on an Evaluation of Remote Control Torch Performance to reduce CO
Kim, Jeong-Hyeok ; Oh, Seck-Hyeog ; Lee, Hae-Gil ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6282~6288
DOI : 10.5762/KAIS.2014.15.10.6282
welding is used widely in the field. On the other hand, welding defects occur when welders cannot adjust the current and voltage needed for welding and have to stop working to adjust the current and voltage, causing sudden cooling down of the welding structure inside a vehicle or tank where the control panel is invisible or when work site is far. This study used three types of existing
welders. This also applied SS400 rolled steel for welding structural purposes for remote control torch welding, perform a welding test through v-groove butt welding with a remote control torch and existing
welding torch, conducted visual inspection on the appearance of a welded top bead. In addition, the appearance quality of the welding part was monitored mainly through penetrant testing and a bending test to evaluate the welding defect reduction and the effect on the performance and compatibility by replacing the existing welder.
Temperature control of the Rework-system using fuzzy PID controller
Oh, Kabsuk ; Kang, Geuntaek ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6289~6295
DOI : 10.5762/KAIS.2014.15.10.6289
Rework systems are the equipment used to install or remove semiconductor chips with BGA or SMD forms in printed circuit boards. The rework systems have hot air outlets. At the outlets, precise temperature control is needed to avoid heat shock. The aim of this paper was to suggest a new controller for temperature control at the hot air outlets. The suggested controller was a fuzzy PID controller. The fuzzy PID controllers were composed of TSK fuzzy rules and had outstanding ability for nonlinear systems control. This paper reports the design algorithm of fuzzy PID controllers, and the design process of the fuzzy PID controller for the temperature control of the outlets. Temperature control experiments were performed to verify the ability of the suggested controller. As a result, the RMS of the proposed method is 9.44 and the general method is 15.88. The experiments showed that the temperatures at the outlet using the suggested fuzzy PID controller followed the desired ones better than the commonly used PID controller.
Improvement in the Channel Capacity in Visible Light Emitting Diodes using Compressive Sensing
Jung, Eui-Suk ; Lee, Yong-Tae ; Han, Sang-Kook ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6296~6302
DOI : 10.5762/KAIS.2014.15.10.6296
A new technique, which can increase the channel bandwidth in an optical wireless orthogonal frequency division multiplexing (OFDM) link based on a light emitting diode (LED), is proposed. The technique uses adaptive sampling to convert an OFDM signal to a sparse waveform. In compressive sensing (CS), a sparse signal that is sampled below the Nyquist/Shannon limit can be reconstructed successively with sufficient measurements. The data rate of the proposed CS-based visible light communication (VLC)-OFDM link increases from 30.72 Mb/s to 51.2 Mb/s showing an error vector magnitude (EVM) of 31 % at the quadrature phase shift keying (QPSK) symbol.
Study of the Applications of Introduction of Computer Engineering Class using PBL
Lee, Keun-Soo ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6303~6309
DOI : 10.5762/KAIS.2014.15.10.6303
In this thesis, PBL was applied to the subject for improving students' many skills that modern industrial society demands. Our engineering school developed PBL problems for PBL use, applied the problems to classes and confirmed the effectiveness of PBL. The study subjects were 63 freshman students in H University who took the 'Introduce of computer engineering'. We applied 5 PBL problems for 15 weeks. They wrote and submitted a reflective journal when they finished the every given PBL activity. In addition, they completed a class evaluation form after the activity of 5th PBL Problem ended. The study showed that the students experienced the effectiveness of PBL, such as the comprehension of the studied contents, the comprehension of the cooperative learning, authentic experience, creative problem-solving skills, presentation skills, communication ability, self-directed study ability and confidence. Some difficulties in gathering together and spending much time were also encountered. The students realized that the PBL learning activities were important methods because the students could develop into future intelligent engineers that modern industrial society demands through PBL learning activities. The main goal of an engineering school is to produce specialists with creative problem solving ability so that the effects of this study are quite promising for our engineering school.
Design and Implementation of Network Access Control based on IPv6
Shin, HaeJoon ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6310~6316
DOI : 10.5762/KAIS.2014.15.10.6310
The increase in the Internet and smart device users requires high-level network security. Network security consists of Web Firewall, Network Firewall, IPS, DDoS system, UTM (Unified Treat Management), VPN, NAC (Network Access Control), Wireless security, Mobile security, and Virtualization. Most network security solutions running on IPv4, and IPv6 network services are not sufficiently ready. Therefore, in this paper, this study designed and implemented important functions of Network Access Control (NAC), which include IPv6 host detection, isolation, blocking and domain assignment for the IPv6 network. In particular, domain assignment function makes 128 bits IPv6 address management easy. This system was implemented on a KISA IPv6 test-bed using well known devices. Finally, the test result showed that all IPv6 based wired and wireless devices were well-controlled (detection, blocking, isolation and domain assignment).
Embedding Binary Watermark Image using DWT Coefficients
Park, Kwang-Chae ; Bae, Ceol-Soo ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6317~6321
DOI : 10.5762/KAIS.2014.15.10.6317
Multimedia documents can be transferred quickly and easily across the Internet, and has attracted considerable interest in multimedia security and multimedia copyright protection. This paper proposes an animage watermarking scheme embedding a binary watermark image using Discrete Wavelet Transform (DWT) coefficients. The original image is transformed to the wavelet domain and decomposed in subbands. The binary watermark image, as a sequence of bits, is embedded into the middle frequency subbands. The original image is not needed to detect the watermark image. The proposed method detected fewer watermark bits but produced an approximately 10dB higher PSNR than the max/min method.
Numerical Analysis of Load Bearing Behavior of Shallow Foundations
Lee, Seung-Hyun ; Lee, Su-Hyung ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6322~6328
DOI : 10.5762/KAIS.2014.15.10.6322
Finite element analyses were performed to find out the load bearing behavior of three kinds of shallow foundations. The analysis results for strip footing showed that local shear failure mode could be observed for a zero dilatancy angle and general shear failure mode could be seen for non-zero dilatancy angles. The ultimate bearing loads for non-zero dilatancy angles were approximately 1.5 times higher than that of a zero dilatancy angle. General shear failure mode was observed for circular footing and square footing regardless of the dilatancy angle. The ultimate bearing loads for a non-zero dilatancy angle were slightly greater than that for a zero dilatancy angle. A comparison of the load-settlement curves for three kinds of footing showed that the load bearing capacities for non-zero dilatancy angle were greater than those for a zero-dilatancy angle.
Design Comparison by Node Width Variation of Strut-Tie-Model
Uy, Lymei ; Son, Byung-Jik ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6329~6335
DOI : 10.5762/KAIS.2014.15.10.6329
In the Strut-Tie-Model(STM), the width of a node is important in both analysis and design. Its effects on the force distribution at truss analogy system. In addition, it effects the verification of all struts and nodes, which need to be checked to satisfy the code of design. Code here refers to the ACI-318 code. Four methods were used to define the width of node: 1) effective depth is assumed to equal to 0.9 of the overall depth of beam, 2) moment equilibrium 3) assumption of the width of node at the bottom equal to 380mm, and 4) the new proposed method by this study. 106 selected samples of a parametric study obtained from the four methods were analyzed. Because total steel requirement from these four methods are similar, the easiest would be a good choice for a time saving calculation.
Study of Trends in The Architecture and The Economic Efficiency of 3D Printing Technology
Jung, Suk-Jae ; Lee, Tae-Hee ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6336~6343
DOI : 10.5762/KAIS.2014.15.10.6336
The aim of this study was to consider new 3D printing techniques and how to use them in architecture, compare the 3D printing and current techniques, and analyze them economically. 3D printing technology is expected to result in considerable changes to the entire system, such as production and distribution using this new technology in the near future. In addition, architecture is expected to follow this trend. This study examined how to take advantage of 3D printing technology in construction to prepare for a new architectural trend of 3D printing technology in the future. This study examined the 3D printing technology that is used in buildings and the current state of 3D printing technology. In addition, the 3D printing technology and current technology was also compared, and analyzed economically. 3D printing technology is the step before the stage of practical use. On the other hand, the commercialization of 3D printing technology makes it possible to reduce the cost compared to the current method. Furthermore, as the technology is developed in the future, the cost is expected to be reduced further. Therefore, the use of 3D printing technology in architecture is expected increase continually.
Study of the Changes in Knowledge Industrial Center Layout Planning Types and Outside Space Composition Elements -Focusing on Guro-gu and Geumcheon-gu in semi-industrial district in Seoul-
Lee, Sang-Kyoon ; Oh, Joon-Gul ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6344~6353
DOI : 10.5762/KAIS.2014.15.10.6344
According to the changes in society, the knowledge industrial center, which is a factory related to the manufacturing industry, is now including various programs, such as information and communication knowledge. This study defined the knowledge industrial center related law into three periods: deduct layout planning type and outside space composition elements by previous research; case analysis; and suggestions of the direction of layout planning and outside space plan. As a result of the analysis, first, before 1999, the layout of the building is made mainly with a car, but depending on the form of the site, it is configured as a centered, side layout. Second, in the case of distribution, the support facility on the lower part is integrated and the factory on the higher part is distributed, so it is partly integrated and the building is unified. Third, beginning with the activation of privately owned public space in a semi-industrial district according to architecture regulations in 1999, the outside space is wider but the construction area is reduced, so the outside space composition has been changing in a similar manner to the planning methods of business facilities, such as office buildings.
Comparison of DGNB and G-SEED in terms of the assessment items - Focusing on case studies of office buildings
Won, Kyoung-Sop ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6354~6365
DOI : 10.5762/KAIS.2014.15.10.6354
This study aims to suggest a direction to develop Korea's certification system by comparing the evaluation items between Korea's G-SEED (Green Standard for Energy & Environmental Design) and Germany's sustainable building certification. A number of eco-friendly building certification systems are being implemented globally. On the other hand, mutually comparable evaluation items have not been suggested up until now. Therefore, international standards have been trying to establish evaluation criteria for eco-friendly buildings, and Germany's sustainable building certification is the first certification standard that has accepted those evaluation criteria. According to the result of comparing Korea's green building certification with Germany's sustainable certification, the green building certification has evaluation items not only on environmentality (62.6%), but also on social aspects (25.4%) and economic aspects (3.0%). This suggests a crucial direction to the development of evaluation items regarding the social and economic aspects of green building certification.
Study of apartment plan technology adopting structural element of Hanok
Park, Kyung Hyun ; Roh, Young-Sook ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6366~6371
DOI : 10.5762/KAIS.2014.15.10.6366
This study examined the structural elements of Korean-style houses (Hanok) and proposed formula accounting for their similar patterns and regular behavior. The design of modern apartment buildings adopts many aesthetic elements from Hanok but those are only for interior decoration. In this study, the projected Hanok eaves were examined in terms of the length of solar insolation. Leaning pillars toward the inside of the building were analyzed in detail not only for the front and back pillar, side pillar, but also the corner pillar. This study also suggested a design element from the Hanok structure, such as the elevated balcony, porch flooring, and inner garden in porch area. In addition, the new apartment plan improved air circulation, ventilation and natural lighting.
Study on Mies' office projects in Germany through an analysis of Formal Types
Kim, Chul-Hwan ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6372~6378
DOI : 10.5762/KAIS.2014.15.10.6372
This study examined the formal types and public space of Mies van der Rohe's office designs in Germany. The characteristics of the formal types, the relationship between public space and formal types, and the composition of public space were analyzed by hierarchy with perspective drawings and plans. The conclusions were as follows. Mies used the formal types, such as U shape and I shape in his early days. Later, he adopted the curved shape and tried to fragment the forms by combining the curved shape with an I shape. Mies designed the entry space in front of the simple formal types. The curved shape was used to create various hierarchical courtyards and rear gardens. The results suggest that Mies developed his own ideas on the formal types and public space utilizing a variety of methods.
Improvement of Construction Information Classification for Applying BIM
Cho, Geun-Ha ; Ju, Ki-Beom ; Song, Jong-Gwan ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6379~6387
DOI : 10.5762/KAIS.2014.15.10.6379
Standardized construction information classification enables extensive information from the construction industry to be shared and exchanged clearly by means of unified information expression. Recently, the constriction information classification in North America and Europe has been revised to adapt to BIM technology and applied to various BIM projects. In Korea, government established construction information classification and made efforts to be standardized. On the other hand, it showed low applicability at the practice field and had no revision plan for adapting BIM. In this study, the authors suggest an improvement plan of construction information classification for applying BIM with the purpose of availability enhancement and adaption to a construction environment change.
Spatio-temporal Variability and Size Fractionation of Chlorophyll a in the Jeju Marine Ranching Area(JMRA) with Special Reference to the Signification of Nanoplankton
Yoon, Yang Ho ;
Journal of the Korea Academia-Industrial cooperation Society, volume 15, issue 10, 2014, Pages 6388~6398
DOI : 10.5762/KAIS.2014.15.10.6388
To understand size fractioned chlorophyll a and material cycle characteristics in Jeju marine ranching area (JMRA), 4 times of survey were conducted from April to November 2008. Picoplankton on the surface in JMRA was on average,
(annual mean(M):17.3%) in the
range, accounting for 17.3%. Nannoplankton and picoplankton was on average,
(M:78.0%) in the
(M:4.7%) in the nd ~ 0.24 range, respectively. The 10m layer was similar to the surface. The measured values changed according to the measurement times but the nanoplankton composition ratio was higher throughout the year. In addition, the size fractioned chlorophyll a distribution in JMRA was similar to that of tropical sea area affected by the Monsoon rather than South Korean offshore coast geographically adjacent to the East China Sea and Japan coastal waters affected by the Kuroshio/Tsushima warm currents. That is, the material cycle of JMRA consists of a microbial food web rather than traditional food chain at a lower trophic levels. Primary production is deemed to have a higher possibility of being adjusted by top-down dynamics, such as micro-zooplankton grazing pressure rather than nutrients supply.