• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.12
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• pp.5909-5919
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• 2012

The purpose of this study was to compare the effects of the intensive ankle joint strategy training on the muscular strength and balancing ability in the elderly women. The subject of this study were 30 elderly women aged from 65 to 80 and randomly assigned to three groups. For 6 weeks, two experimental groups took the training an hour every 3 days of a week. The results that measured the dynamometer, FRT, and SEBT after implementing general lower limbs exercise and the intensive ankle joint strategy training for 6 weeks showed that the changes in the control and experimental group I were not statistically significant while the changes in the experimental group II were statistically significant (p<.05). For the prevention of the elderlies from fall and the treatment approaches, it is deemed to be necessary additional studies on the diverse variables through the intensive training of the ankle strategy.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3066-3073
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• 2009

Joint paths of master and branch pipes are induced mathematically for many kinds of joint patterns between both pipes in 3-axis pipe profile-cutting machines. By compensating them with a kerf width, the real cutting paths are determined, and their CL-data are generated, and the tool paths generated by CL-data are verified by a ghost function. A bevelling of welds is implemented through tilting a cutting torch in the $\beta$-axis direction for 8 sections in the chuck rotation of $\alpha$-axis. A PLC controls simultaneously position and velocity in a real time for $\alpha$, X, $\beta$-axis by loading CL-data generated. We developed the PLC-controlled 3-axis pipe profile-cutting system which can cut a master or branch pipe along the cutting path and simultaneously do a bevelling process.

• Journal of the Korea Safety Management & Science
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• v.19 no.1
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• pp.95-101
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• 2017

The purpose of this study was to investigate the biomechanical of K-Pop dance movement. The study was conducted on 15 male and 15 female subjects in 20-30 age groups. And they choose 150 K-Pop dance choreographies in the top 10 ranking of the main charts. We analyzed the RoM, joint moment and impulse force of the highlight movements. First, During the K-Pop dance motion, the usage of knee joints are more than the hip joints and the ankle joints, and female dancers has a larger range of motion than the male dancers. Second, male dancer uses more than female dancers when they compared the load of male dancers and female dancers. In particular, flexion and extension of the hip joints are mostly used in this study. Third, the impulse force of male dancers was greater than of female dancers, but it was statistically insignificant, this is equal to the impulse on walking. In conclusion, Female dancers use more range of motion than male dancers, but male dancer choreography requires greater torque, which can strain joints. Most choreographic exercises involve movements such as hip joint, knee joint, flexion of ankle joint, extension, rotation, and jumping.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.6
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• pp.3926-3933
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• 2015

The purpose of this study was to determine the factors associated with duration of postoperative delirium following orthopedic joint surgery. This study included 266 patients who underwent orthopedic joint surgery at a single university hospital between January 2012 and February 2014. Patients were divided into two groups according to the duration of delirium: the transient (${\leq}2$ days) and prolonged (>3 days) delirium groups. Of the 266 patients, 137 (52%) developed prolonged delirium. Incidence of pre-existing dementia and history of stroke were significantly higher in the prolonged delirium group than in the transient delirium group. In a multivariate regression model, pre-existing dementia and history of stroke were associated with increased duration of delirium. Our findings suggest that medical practitioners should pay special attention to the prevention and management of postoperative delirium in patients who have dementia or stroke and undergo orthopedic joint surgery.

• Journal of Technologic Dentistry
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• v.28 no.1
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• pp.83-102
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• 2006

The purpose of this study is to understand the present conditions and problems of the joint education between industry and the academic world in the field of dental technology which were identified by the department of dental technology with the related industries and to meet their expectations for the cooperative education. The results of this study will be able to be furnished as basic data in deciding the direction of policy toward skillful dental technicians with a view to improving job employment rate of college graduates. The questionnaires for data were done by the dental technicians working in Daegu City and Kyeongbuk Province and students studying at the department of dental technology, Daegu Health College. The questionnaires of this study were processed by SPSS program. We could confirm through the investigation that on-the-job training as one of the joint policies between industry and the academic world is closely related to all the college education and that the results of on-the-job training can be expected under the close cooperation and the complementary relationship between industry and the academic world. Therefore, this study indicates the directions of policy toward skillful technicians through the cooperation between industry and the academic world as follows : 1. The cooperative systems among industry, academic world, and government are needed for the improvement of efficient job employment rate. The continuous training programs are needed to be built up for the maintenance and development of the technicians'specialty after employment. 2. The all-in-one educational programs both education and employment are needed for the on-the-job training through the cooperation between industry and the academic world, and the activation of the organizations which fully operate them is also needed. That's because the sufficient on-the-job training as one of the joint policies between industry and the academic world and the education of the whole man and the improvement of sociality for the expectant graduates in the academic world can be the methods which reduce the jobless rate and the job-change rate.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.6
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• pp.2489-2499
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• 2011

As R&D cooperation activities with various partners are becoming huge in scale and scope, to achieve successful R&D performance, we need to systematically divide by its characteristics and to stratagemically carry out R&D cooperation activities. In this paper we propose R&D cooperation system between the university and the R&D institute in the geoscience field. The cooperation system can include activities of joint R&D program execution, R&D researcher exchange, R&D infrastructure use, technology commercialization and business exchange. Its system seems to positively affect on R&D performance and when considering the level of innovation as a moderating variable, in the situation of high innovation environment its system is able to positively affect on the R&D performance. For different effects of R&D cooperation activities on individual cooperation performance we can choose proper cooperation activities for R&D cooperation purposes.

• Journal of Korean Library and Information Science Society
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• v.38 no.2
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• pp.337-352
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• 2007

The purpose of this study was to investigate the joint-use libraries from other countries and provide some directions for the joint use library of Korea. The analyses revealed that there were two types of joint-use libraries broadly. One was school/public library, and the other was academic/public library. The advantages of joint-use libraries were the hiring of professional staff, collection increase, various library programs, and the efficient use of library space. The disadvantages of joint use libraries were the problems of the joint-use library located in school, busy space, limited library collection, and the limited function of school library. Success factors for Joint use libraries were the population of community, process of formal planning, community involvement and support, written legal agreement. This study showed two types of joint-use libraries for Korea : school/public library for rural areas and academic/public library for small cities.

• ETRI Journal
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• v.38 no.5
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• pp.941-951
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• 2016

In this paper, cognitive radio and simultaneous wireless information and power transfer (SWIPT) are effectively combined to design a spectrum-efficient and energy-efficient transmission paradigm. Specifically, a novel SWIPT-based primary-secondary cooperation model is proposed to increase the transmission rate of energy/spectrum constrained users. In the proposed model, a multi-antenna secondary user conducts simultaneous energy harvesting and information forwarding by means of power splitting (PS), and tries to maximize its own transmission rate under the premise of successfully assisting the data delivery of the primary user. After the problem formulation, joint power splitting and beamforming optimization algorithms for decode-and-forward and amplify-and-forward modes are presented, in which we obtain the optimal PS factor and beamforming vectors using a golden search method and dual methods. Simulation results show that the proposed SWIPTbased primary-secondary cooperation schemes can obtain a much higher level of performance than that of non-SWIPT cooperation and non-cooperation schemes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.5
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• pp.502-509
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• 2019

Studies have been made on performance evaluation of expansion joint systems for an ordinary highway or road bridge. However little study has been made for runway connection bridges at airports. A study on performance evaluated from computer code analysis and shrinkage, extension, and compression repetition tests based on KS F 4425 is conducted to a newly developed expansion joint system which has been installed in a runway connection bridge at Incheon Airport Extension 2 Construction Site. The MIDAS computer code is used to analyze the performance before the manufacture of the mock-up of expansion joint system on the basis of design requirements. Tests based on the KS F 4425 of 2001 year-version are conducted for the mock-up. Domestic codes and standards to validate the performance of the expansion joint system in a connection bridge have been developed for a vehicle. However the expansion joint system tested in this study is installed in a runway connection bridge for an aircraft. Conservatively the heaviest one among airplanes departing and landing at Incheon Airport is assumed level-F $468.4kN/m^2$ and adopted for the tests and analyses in this study. KS F 4425 method is selected for the shrinkage, extension, and compression repetition tests. No remarkable problem was observed for the 2,500-cycle shrinkage and extension and two million-cycle repeatition load tests. The results of this study are expected to contribute to establishment of code and standard for the performance validation of an expansion joint system installed in a runway connection bridge for an aircraft by providing performance test results and computer analysis results based on finite element methods.

• Special Issue of the Society of Naval Architects of Korea
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• 2009.09a
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• pp.80-86
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• 2009

In order to improve productivity of large container ship construction, large heat input and/or high productive welding technologies are necessary. This can be achieved by the joint research and cooperation among steel maker, welding consumable company, welding equipment company and ship yards. Two electrodes SAW process is effective the plate butt welding and partial joint welding, while FGB welding process is for the connection of block to block joint. The higher strength and thicker steel is developed, the more reliable welding procedure such as two electrodes EGW including light weight welding equipment should be developed.