• English Language & Literature Teaching
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• v.17 no.3
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• pp.309-326
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• 2011

This study examines the relationship between second language use outside of class and oral proficiency development. It first identifies out-of-class activities of international graduate students in the U.S. and the average time spent speaking English in those out-of-class activities. Interviews and student self-measurements of time spent speaking English each day were used to investigate the types and quantities of out-of-class activities. In addition, two sets of student oral proficiency test scores were collected. Correlation analysis is used to find out the relationship of the variables between the most salient out-of-class activities and oral proficiency gains. The findings indicate that second language use outside of class is important for international graduate students to improve their oral proficiency. This is especially true with regularized interaction such as talking at work and the average time spent speaking in English a day outside of class. This study suggests that learners of English in an ESL environment should be encouraged to take part in out-of-class activities in addition to English use in the classroom in order for them to improve their oral proficiency.

• Culinary science and hospitality research
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• v.13 no.2
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• pp.240-253
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• 2007

The purpose of this study is to crystallize the factors which influence the eating-out tendency at home and work site including in the range of Daegu city. We can find out that taste is the most important element for family eating-out style. Then comes sanitation, service, reputation of a restaurant and price in that order. There are some differences between family eating-out style and workers eating-out style. The only thing that differs from above referred to statement is that price is prior to the reputation of a restaurant. Thus, taste is more important than any other factor in investigative studies. And, in case of family eating-out style, the reputation of a restaurant is prior to price. In case of workers eating-out, however, price is more important than the reputation of a restaurant.

• Journal of Fisheries and Marine Sciences Education
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• v.20 no.3
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• pp.369-380
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• 2008

The government has promoted the local fishing port construction project since 1972 for conquest of the crisis of the fishing village by withering of a fishery, the improvement in fishermen's living environment and quality of life, and promotion of fisheries. In order to estimate the local fishing port construction project objective and synthetically, and to grope for the method proposal of system establishment of the project, the monitoring survey was carried out. The monitoring survey was classified into the program and the performance monitoring. The program monitoring was carried out in order to investigate the project fit for the inhabitants of a fishing village. The performance monitoring was carried out in order to investigate the development latent powers, fishery latent powers, tourism latent powers of a fishing village, rural settlement conditions, etc. using various statistical materials. Since investigating the measured value before executing a policy was not completed, the project effect was compared with the measured value of other areas. According to the local fishing port construction project, the development latent powers, fishery latent powers, and tourism latent powers of the fishing village where the project was undertaken improved greatly, and income of the fishing village increased greatly. As a result of comparing project fit in order to evaluate the project, the project fit of the local fishing port construction project area was higher than the non-project area. Desirable method proposal of monitoring survey was established and the method for raising the efficiency of monitoring survey was extracted.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.16 no.2
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• pp.84-91
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• 2007

The radial error motion of a machine tool cutter/spindle system is critical to the dimensional accuracy of the parts to be machined. This paper presents an investigation into spindle run-out effects on cutting mark and surface roughness. We experimented the effects of spindle run-out on surface roughness in flat-end milling by cutting AL 7075 workpiece in various cutting conditions. In order to analyze the effects of run-out on the surface roughness, the spindle's radial error motions was measured by mounting a sphere target onto the spindle as a reference. From the experimental results, it was found that spindle un-out makes a directive effects on surface roughness in flat-end milling.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.15 no.26
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• pp.159-163
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• 1992

The assumption of reinvestment rate leads to the results conflicting with the priority order of investments determined by net present worth. It has been revealed through various studies that the priority order of projects determined by the criteria based on internal rate of return is different from that determined by present worth. This study is to find out how to define reinvestment rate of return influencing the decision-making of the priority order through examining the meanings of reinvestment rate of capital and true rate of return, and to present some examples with a simple mathematical model.

• Proceedings of the KSR Conference
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• 2002.05a
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• pp.452-457
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• 2002

High speed railroad noise is one of the main causes of environmental impact. An estimate of the relevant noise levels is usually required in order to evaluate the noise barrier and the anti-noise trailer. This paper introduce the test procedure and the estimate for HST noise. The aim of this is to measure, by means of a test, the level of acoustic pressure present during the passing of a KTX(Korea Train Express), in order to satisfy the contractual requirements and the noise criteria. A number of measurements are carried out in order to estimate noise impact by HST along test track.

• Bulletin of the Korean Mathematical Society
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• v.46 no.2
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• pp.367-372
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• 2009

In this paper, univalence of a certain integral operator and some interesting properties involving the integral operators on the classes of complex order are obtained. Relevant connections of the results, which are presented in this paper, with various other known results are also pointed out.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.7-11
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• 1991

The adaptive control of flexible joint manipulator is the focus of this paper. The full order flexible joint manipulator dynamic system does not allow the determination of a feedback linearization control as for rigid manipulators. This drawback is overcome by a model order reduction based on a singular perturbation strategy. The full order flexible joint manipulator dynamic model is adopted for derivation of the adaptive control law to damp out the elastic oscillations at the joints. It is shown that the joint position error will converge to zero asymptotically and that other signals remain bounded without precise knowledge of parameters of the manipulator and its joint flexibility.

• Honam Mathematical Journal
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• v.40 no.2
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• pp.251-264
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• 2018

In the present study, we consider the curves in Galilean 4-space ${\mathbb{G}}_4$. We find out the involute curves of order k (k = 1, 2, 3) of a given curve. We get the relationships between the Frenet apparatus of a given curve and its involute curves of order k.

• Journal of Digital Convergence
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• v.15 no.12
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• pp.71-77
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• 2017

In order for the consumers of education and university to be mutually communicating well, satisfaction surveys with a correct system are essential. This study points out the causes for insincere responses found in the process of education satisfaction surveys while discussing possible methods to elicit sincere responses from the students. As a result of analyzing S University, it was observed that enforced online evaluation methods did have a high response rate but also monotonously insincere responses showed to have a high ration among them. A second study was carried out in order to improve the research method after confirming the reliability of the research. Study results sowed that through a representative sample survey, monotonous response patterns decreased and the data distribution satisfied normal distribution. Moreover, a focus group interview was carried out in order to understand the root causes and possible solutions to the problem. Lastly, this study revealed the need of diversified attempts and research in order to secure reliability in education satisfaction surveys while proposing methods of improvement.