• Journal of the Korean Society of Manufacturing Process Engineers
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• v.17 no.2
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• pp.30-36
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• 2018

Since the freezer compartment and the refrigerating compartment are located side by side in a side-by-side refrigerator, the problems of the door height difference (DHD) and door flatness difference (DFD) have been constantly raised. Deformation of the cabinet of a built-in side-by-side refrigerator under food and thermal loads was analyzed by the finite element software ANSYS. The DHD and DFD, occurring due to the deformation of the cabinet, evaluated. From the results of the analysis of the cabinet, the 3D CAD software CATIA was used to geometrically translate and rotate the freezing and refrigerating compartment doors, in consideration of the displacement of the hinge fastening point. Then, the coordinates of two points on the upper corner of the doors were determined, and the DHD and DFD were obtained. It found that the thermal load, occurring under normal operation conditions, decreases the door height difference, but increases the door flatness difference. Values of the analyzed DHD and DFD appear smaller than the acceptance criteria used by the refrigerator manufacturer.

• Fashion & Textile Research Journal
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• v.1 no.4
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• pp.376-386
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• 1999

The purpose of this study was to determine the physiological responses and the Subjective sensations of the human subjects when 10 human subjects(5 males and 5 females) were tested with selected ensembles, including the uniforms of students, industrial and bank workers. For the study, garment material and design were selected, which was mostly used in Taegu area by the survey. Thermal manikin and the human subject tests were performed. The results were as follows: 1. There was no significant difference among skin temperature of head by season and among that of breast and back by all variables, however, there was a significant difference among that of belly by gender and that of thigh and shank by season. In addition, there was no significant difference among rectal temperature by gender and season, but there was a significant difference by uniform. 2. Mean skin temperature of male subjects was significantly higher than that of female subjects. Specially in lower environmental condition, the difference got larger. 3. There was a significant difference among purse rate of subjects by uniform, but there was no significant difference among those by gender and season. There were no significant difference among maximum and minimum blood pressure by gender, uniform, and season. 4. There was a significant difference in temperature of chest among gender and uniform, and there was no significant difference in temperature of back by season. In addition, There was a significant difference in humidity of back by uniform and season but there were no significant difference in that by gender. 5. There was a significant difference in humidity sensation by gender, comfort sensation by uniform and season, but there was no significant difference thermal sensation by uniform and season. 6. For the result of regression analysis, we got the regression equations as follows: Clo=1.810 Thickness+0.525, Clo=0.475 weight+0.863.

• Journal of Family Resource Management and Policy Review
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• v.9 no.2
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• pp.127-144
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• 2005

The purpose of this study was to find out the characteristics of the exchange resources when women choose their spouse, and their marital satisfaction in accordance with those resources. For this, women under marriage of less than five years were subjected, categorized into three groups according to the age difference of the couple, and were examined the influence of the personal and parental resources when choosing their spouse on the early marital satisfaction. The results of the study were as follows: First, the personal and parental resources for each age difference of the married couple didn't have a meaningful difference in general. Second, it is shown from the characteristics of the marital satisfaction of each age difference group that there is no particular meaningful difference. Finally, when it comes to the difference in marital satisfaction in accordance with the exchange resources, the personal resources had a meaningful difference in the value field in case of having the same religion. In case both the husband and wife were the second child or younger, there was a meaningful difference in the mutual action field than there was when they were both first-born. In the emotional and the mutual action field of marital satisfaction, a meaningful difference was seen when the couple had the same kind of jobs than when wives had upper level jobs. Concerning the parental resources, a meaningful difference was shown in the mutual action field of the marital satisfaction when the parents of the both sides had the same level of scholastic attainment.

• Journal of the Chungcheong Mathematical Society
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• v.12 no.1
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• pp.125-131
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• 1999

We obtain some sufficient conditions for oscillation of the neutral difference equation with positive and negative coefficients $${\Delta}(x_n-cx_{n-m})+px_{n-k}-qx_{n-l}=0$$, where ${\Delta}$ denotes the forward difference operator, m, k, l, are nonnegative integers, and $c{\in}[0,1),p,q{\in}\mathbb{R}^+$.

• Journal of the Chungcheong Mathematical Society
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• v.22 no.3
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• pp.535-543
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• 2009

We investigate h-stability of solutions of nonlinear Volterra difference systems and linear Volterra difference systems.

• Communications for Statistical Applications and Methods
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• v.7 no.3
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• pp.871-884
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• 2000

Using simulation, we compare the perturbation analysis estimate and the forward difference estimate for the first and second derivatives of performance measures in a Markov renewal process. We find the perturbation analysis estimate has much les mean squared error than the traditional forward difference estimate.

• Journal of the Korean Wood Science and Technology
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• v.22 no.3
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• pp.45-50
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• 1994

This experiment was to investigate the effects of UV radiation and chemical treatments on the color difference in antioxidant (Tris(2,4-di-t-butyl phenoxy) phosphite)-containing polyurethane coats. The results obtained were summerized as follows: 1. The color difference increased as the exposure time of UV radiation increases, but decreased as addition level of antioxidant increaes. 2. After 400 hours exposure to UV radiation, the color difference respectively showed 6.13 and 5.94 at 0.7 % and 1.0 % addition level but appeared more severe below 0.7 % addition level. Thus, antioxidant prevented discoloration effectively. 3. The color difference of films by chemical treatments increased after 8 hours. Color difference of films treated with 5 % acetic acid($CH_3COOH$), 30 % ethyl alchol ($CH_3CH_2OH$) showed 7.31 and 7.30 respectively. 1 % sodium hydroxide treatment showed 1.86 color difference after 8 hours.

• Journal of Korean Physical Therapy Science
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• v.11 no.2
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• pp.27-37
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• 2004

The propose of the study was to evaluate the efficacy of the partial body weight support during treadmill training on the ambulation in elderly with chronic stroke. Fourteen hemiplegic volunteers participated and were divided into an experimental and control groups. In the experimental group, the body weight support during treadmill training was performed 3 times per week for 6 weeks. In the control group, usual treadmill training was applied. Before and after experiments, temporal-spatial gait parameters were measured. The date of 14 patients who carried out the whole experimental course were statistically analyzed. The results of the study were : 1. In the comparison of gait velocity before and after experiment, the gait velocity was significantly increased in the experimental group and the control group(p<.05). In the comparison of difference of the gait velocity between groups, there was not significant difference between the experimental group and the control group(p>.05). 2. In comparison of gait cadence before and after experiment, the gait cadence was significantly increased in both groups(p<.05). In the comparison of difference of the gait cadence between groups, there was not significant difference between the experimental group and the control group(p>.05). 3. In the comparison of step length before and after experiment, the step length was significantly increased in the experimental group and the control group(p<.05). In the comparison of difference of the step length between groups, there was not significant difference between the experimental group and the control group(p>.05). 4. In the comparison of vastus medialis root mean square(RMS) before and after experiment, the vastus medialis RMS was significantly increased in the experimental group(p<.05). In the comparison of vastus medialis root mean square(RMS) before and after experiment, the vastus medialis RMS was not significantly increased in the experimental group(p>.05). In the comparison of difference of the vastus medialis RMS between groups, there was not significant difference between the experimental group and the control group(p>.05). 5. In the comparison of latency of somatosensory evoke potential(SSEP) before and after experiment, the latency of SSEP was significantly increased in the experimental group(p<.05). In the comparison of latency of somatosensory evoke potential(SSEP) before and after experiment, the latency of SSEP was significantly decreased in the control group(p>.05). In the comparison of difference of the latency of SSEP between groups, there was not significant difference between the experimental group and the control group(p>.05). 6. In the comparison of functional ambulation profile(FAP) before and after experiment, the FAP was not significant difference in the experimental group and the control group(p>.05). In the comparison of difference of the FAP between groups, there was not significant difference between the experimental group and the control group(p>.05).

• Bulletin of the Korean Mathematical Society
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• v.50 no.5
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• pp.1471-1479
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• 2013

In this paper, we study the non-existence of finite order entire solutions of nonlinear differential-difference of the form $$f^n+Q(z,f)=h$$, where $n{\geq}2$ is an integer, $Q(z,f)$ is a differential-difference polynomial in $f$ with polynomial coefficients, and $h$ is a meromorphic function of order ${\leq}1$.

• Kyungpook Mathematical Journal
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• v.45 no.1
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• pp.137-152
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• 2005

We introduce the concept of what we call "regular difference covers" and prove many nonexistence results and provide some new constructions. Although the techniques employed mirror those used to investigate difference sets, the end results in this new setting are quite different.