• Journal of the Microelectronics and Packaging Society
• /
• v.20 no.4
• /
• pp.17-23
• /
• 2013

As a basic research to develop stretchable electronic packaging technology, CNT-Ag composite pads were formed on top of Cu/Sn chip bumps and flip-chip bonded using anisotropic conductive adhesive. Average contact resistances of the flip-chip joints were measured with respect to bonding pressure and presence of the CNT-Ag composite pads. When Cu/Sn chip bumps with CNT-Ag composite pads were flip-chip bonded to substrate Cu pads at 25MPa or 50 MPa, contact resistance was too high to measure. The specimen processed by flip-chip bonding the Cu/Sn chip bumps with CNT-Ag composite pads to the substrate Cu pads exhibited an average contact resistance of $213m{\Omega}$. On the other hand, the flip-chip specimens processed by bonding Cu/Sn chip bumps without CNT-Ag composite pads to substrate Cu pads at 25MPa, 50MPa, and 100MPa exhibited average contact resistances of $370m{\Omega}$, $372m{\Omega}$, and $112m{\Omega}$, respectively.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.14 no.1 s.33
• /
• pp.44-54
• /
• 1990

The purpose of this study was to investigate the effects of thickness of the sleeping pad on the physiological responses and the microclimate in the heating ondol room during sleeping time. The measuring points were skin temp., weight loss and body movement as physiological responses and the compression ratio, the temp. on/under the sleeping pad, the inside limp. of the sleeping quilts and subjective sence while 7 hours sleeping. Thickness of sleeping pads was 27.2 mm(A), 34.8 mm (B), 47.9 mm(C) used for 90 days and no used pad 60.7 mm(D). The floor surface temp. was keeping $29{\pm}1^{\circ}C$ while the environmental conditions was at $23{\pm}1^{\circ}C$ ($50{\pm}5\%$ R.H.) The results were as followings; 1) The mean compression ratio after using the sleeping pads for 45 days was about $70\%$ , and it wasn't increased any more thereafter 2) After 2 hours sleeping the temp. under the sleeping pads was shown that C and D were higher than A and B, and the temp. on the sleeping pads was shown that A and C pads were higher than B and D. But after 3-4 hours sleeping the skin temp. of legs was shown that B and D pads were higher than A and C. 3) Weight loss for C pad was significantly higher than others. Body movement and side position in tying was higher in A and C pads than B and D. 4) The inside temp. of quilt for A and C pads were higher in the early part of sleeping period than those of B and C pads and relative humidity was lower in C than others. 5) D pad was softer than others and fatigue degree was turned out to be lowest in D, the highest in A. From this point of view, we concluded that thickness of the sleeping Pad in the heating ondol room had different characteristic from that in no heating ondol room. And 35 mm used pad was turned out to be proper.

• Journal of Nutrition and Health
• /
• v.27 no.2
• /
• pp.119-126
• /
• 1994

The effect of diets(high fat, high fat high energy, pectin, cellulose) on adipocyte of epididymal fat pads were investigated in 70 male rats for 8 weeks. The rats were assigned to a control(C), high fat(HF) and high fat high energy(HFHE) group for 4 wks. During the next 4 wks, reassigned to one of three treatments (high fat, pectin supplemented, cellulose supplemented) in the HF group and one of three treatment (high fat high energy, pectin, cellulose) in the HFHE group. Therefore, the total experimental groups were 7 (C, HF, HF-P, HF-C, HFHE, HFHE-P, HFHE-C). Parameters evaluated and compared for each diet were body weight, total energy intake, feed efficiency ratio and weight changes in epididymal fat pads. The results are summarized as follows ; 1) There was no significant difference in body weight gain among the groups. 2) Total energy intake was higher in the C group than other groups. 3) Feed efficiency ratio (F.E.R) of the HF and HFHE groups were greater than C group(2, 4 weeks). However, there were no significant differences between the HF and HFHE groups. 4) Epididymal fat pads(EFP 100g/B.W) of the FH and HFHE groups were higher than C group (2, 4 weeks). However, there were no significant differences between the HF and HFHE groups. There was no significant difference in weight gain of epididymal fat pads among the groups(8 weeks). 5) Cell number and cell size of epididymal fat pads of the HF and HFHE groups were higher than the C group. The pectin and the cellulose supplementation groups decreased cell number and cell size of epididymal fat pads. Especially, the pectin supplementation group decreased than the cellulose supplementation in HFHE group. Therefore, we can concluded that the HF and the HFHE diet has no effect on the epididymal fat pads.

• The Research Journal of the Costume Culture
• /
• v.8 no.1
• /
• pp.123-132
• /
• 2000

When adding shoulder pads to clothing, the shoulder pads brings down the quality of armpit area and the width of shoulder area, 1.5㎝ thick non-woven shoulder pads are good for sensory evaluation but do not function as well. Therefore this study has done to come up with a solution to satisfy both sensory evaluation and functionality. The study did was by using laboratory blouses with three different types of shoulder pads, which were two different armpit depths (1.0㎝, 2.0㎝), 3 types of armpit widths (0.5㎝, 1.0㎝, 1.5㎝). The Result are as followed : 1. The sensory evaluation was affected the most by the armpit depths and shoulder lengths. 2. There were two results for the best sensory evaluation, they were the one with a pad of armpit depth of 1.0㎝, armpit width of 1.5㎝, and shoulder width of 1.5㎝. 3. The functionality was affected in an order of movement, armpit width, and shoulder width. 4. The two results for the best functionality were the one with shoulder pads of armpit depth of 1.0㎝, armpit width of 1.5㎝, and shoulder width of 1.5㎝, and the one with armpit depth of 1.0㎝, armpit width 1.5㎝, and shoulder width of 1.5㎝. 5. In conclusion, 1.2㎝ nonwoven shoulder pads on a blouse with a pattern of armpit depth of 1.0㎝, armpit width of 1.5㎝, and shoulder width of 0.5㎝ will satisfy both sensory evaluation and functionality at the same time.

• Journal of Fashion Business
• /
• v.26 no.3
• /
• pp.72-86
• /
• 2022

Volume-up pads are the most common and easiest way to make women with small breasts beautiful. In this study, to develop a volume-up brassiere pad with excellent wearing effects and appearance, 24 different types of volume-up pads commercially available in the online market were investigated and then 11 types were purchased. Among these eleven types, four pads (PAD1, PAD2, PAD3, PAD4) with distinct shapes and materials were selected through a pre-test. They were compared to the newly developed pad for research (PAD5). The results of the study follow. The results of evaluating appearance when wearing the developed pad (PAD5) were significantly higher than that of other pads, and the appearance evaluation score for the full-cup type pad was excellent. In the wearing satisfaction evaluation result, PAD5 showed generally excellent evaluation scores, and in the case of the touch, preference for the fabric material was higher than that of the silicon pad. In the evaluation of motion adaptability, the developed PAD5 showed generally excellent evaluation scores in all movements, indicating that the full-cup type pads had better motion adaptability than the partial-type pads.

• Journal of the Korean Data and Information Science Society
• /
• v.16 no.2
• /
• pp.401-410
• /
• 2005

In this paper, we calculate the premium rate of reliability insurance policy for brake pads for automobiles using real failure data obtained from use-condition. We try process capability analysis for the manufacturing process of brake-system. We describe the performance factors which have an effect on failure characteristics of brake pads. We also obtain the maximum likelihood estimates of shape and scale parameters of the fitted Weibull distribution for brake pads.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.40 no.3
• /
• pp.516-525
• /
• 2016

Lumbar discs are one of the first parts of the musculoskeletal system to age in the human body. Lumbar disc for females start to age at twenty years of age and completely age between fifty and sixty. The number of lumbar herniated intervertebral disc patients are increasing rapidly; however, studies on protective inner wear are insufficient. This study was conducted to develop protective inner wear equipment that retains an aesthetic appreciation of the body. The methods and procedures of this study are as follows. First, foreign and domestic lumbar pads were researched and analyzed by visiting medical shops and internet shopping malls that sell lumbar pads. Second, the survey was conducted on forty patients with disc disease in hospitals located in Seoul and surrounding suburbs. The following are the study results and observations. First, the lumbar pads selling on the market had a variety of designs, textiles, and fabrics. The result of the research was to develop additional inner protective equipment for lumbar herniated intervertebral disc patients. Second, the survey results of the forty patients with disc disease were that housewives were the most vulnerable. All patients had experience purchasing lumbar pads. The prevention of pain and stress were the most selected responses for the motivation to buy lumbar pads. Most individuals said that they used lumbar pads for less than 1 year. Dissatisfaction came from fabric, activity and design. 'Being uncomfortable to wear' was the most common complaint. 'Protection and how easy the clothes were to wear' were the most selected for the necessity of developments. The Inner wear shape was the most selected in shape. Except for six respondents, all favored the lumbar protective inner wear design.

• Tribology and Lubricants
• /
• v.13 no.1
• /
• pp.53-61
• /
• 1997

Experiments are conducted to investigate the effects of distance between pads on the film pressure and the inlet pressure build-up at the entrance of pad bearings. The inlet pressure and the film pressure are measured by manometers in several cases of the distance between pads. The experimental results are also compared with the theoretical results which are calculated using the several methods for the estimation of the inlet pressure. In the experimental results , the distance between pads has a large influence on the film pressure and the inlet pressure build-up a bearing entrance. It is also shown that the effects of the inlet pressure on the film pressure are remarkable, although inertia parameter is a little higher (${\ge}0.05$).

• Transactions of the Korean Society of Mechanical Engineers
• /
• v.17 no.8
• /
• pp.1921-1930
• /
• 1993

In order to evaluate the inlet pressure correctly, the full Navier-Stokes equations are solved numerically for the computational domain which covers the cavity region between pads as well as the bearing film. A nonuiform grid system is adopted to reduce the number of grid points, and the numerical solutions are obtained for a wide range of Reynolds number in laminar regime with various values of the distance between pads. The numerical results show that the inlet pressure is significantly affected by Reynolds number and the distance between pads. An expression for the loss coefficient in terms of Reynolds number and non-dimensional distance between pads is obtained on the basis of the numerical results. It is found that the inlet pressure over the whole range of numerical solutions can be fairly accurately estimated by applying the formula for the loss coefficient to the extended Bernoulli equation.

• Tribology and Lubricants
• /
• v.18 no.3
• /
• pp.204-210
• /
• 2002

Automotive brake pads with four different sizes of zircon particles (average sizes of 1㎛, 6㎛, 75㎛, and 140㎛, respectively) were investigated to evaluate the size effect of abrasive particles on friction performance. Results showed that the brake pads with the larger size of zircon particles tend to show better frictional stability and low pad wear. However, the rotor surface was severely abraded in the case of using larger zircon particles. On the other hand, the small zircon particles in the pads showed the fast increase of the coefficient of friction with friction force oscillation and the tendency was pronounced at low sliding speeds. The brake pads with small particle sizes also exhibited strong fade phenomena at elevated temperatures.