• Proceedings of the KSME Conference
• /
• 2001.11a
• /
• pp.698-702
• /
• 2001

This paper presents a combinatorial method to compute the solutions of optimization problem. The present hybrid algorithm is the synthesis of an artificial life algorithm and the random tabu search method. The hybrid algorithm is not only faster than the conventional artificial life algorithm, but also gives a more accurate solution. In addition, this algorithm can find all global optimum solutions. And the enhanced artificial life algorithm is applied to optimum design of high-speed, short journal bearings and the usefuless is verified through this example.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.27 no.1
• /
• pp.48-55
• /
• 2022

This paper proposes a battery remaining useful life (RUL) prediction method using a deep learning-based EMD-CNN-LSTM hybrid method. The proposed method pre-processes capacity data by applying empirical mode decomposition (EMD) and predicts the remaining useful life using CNN-LSTM. CNN-LSTM is a hybrid method that combines convolution neural network (CNN), which analyzes spatial features, and long short term memory (LSTM), which is a deep learning technique that processes time series data analysis. The performance of the proposed remaining useful life prediction method is verified using the battery aging experiment data provided by the NASA Ames Prognostics Center of Excellence and shows higher accuracy than does the conventional method.

• Journal of the Korean Wood Science and Technology
• /
• v.47 no.3
• /
• pp.360-370
• /
• 2019

Woody crops cultivated in short-rotation coppices are attractive sources of lignocellulosic materials for bioethanol production, since they are some of the most abundant renewable resources. In this study, we evaluated the effects of the growth period on bioethanol production using short-rotation woody crops (Populus nigra ${\times}$ Populus maxiwiczii, Populus euramericana, Populus alba ${\times}$ Populus glandulosa, and Salix alba). The carbohydrate contents of 3-year-old and 12-year-old short-rotation woody crop branches were 62.1-68.5% and 64.0-67.1%, respectively. The chemical compositions of 3-year-old and 12-year-old short-rotation woody crop branches did not vary significantly depending upon the growth period. However, the 3-year-old short-rotation woody crop branches (glucose conversion: 26-40%) were hydrolyzed more easily than their 12-year-old counterparts (glucose conversion: 19-24%). Furthermore, following the fermentation of enzymatic hydrolysates from the crop branch samples (by Saccharomyces cerevisiae KCTC 7296) to ethanol, the ethanol concentration of short rotation coppice woody crops was found to be higher in the 3-year-old branch samples (~ 0.18 g/g dry matter) than in the 12-year-old branch samples (~ 0.14 g/g dry matter). These results suggest that immature wood (3-year-old branches) from short-rotation woody crops could be a promising feedstock for bioethanol production.

• BMB Reports
• /
• v.42 no.4
• /
• pp.212-216
• /
• 2009

The short in vivo half-life of GLP-1 prevents it from being used clinically. This short half-life occurs because GLP-1 is rapidly degraded by dipeptidyl peptidases such as DPP-IV. To overcome this obstacle, a GLP-1/Fc was constructed and evaluated to determine if it was degraded by DPP-IV and in serum. When the degradation of GLP-1/Fc by human DPP-IV and rabbit serum was compared with that of GLP-1 it was found to be reduced by approximately 5- and 4-fold, respectively. Furthermore, GLP-1/Fc showed a potent activity for human GLP-1 receptor activation ($EC_{50}$ approximately 6 nM). Taken together, these results indicate that GLP-1/Fc may have an extended half-life in vivo that occurs as a result of inhibition of degradation by human DPP-IV. Due to the extended half life, GLP-1/Fc may be useful for clinical treatments.

• Transactions of the Korean Society for Noise and Vibration Engineering
• /
• v.12 no.6
• /
• pp.478-487
• /
• 2002

This paper presents a hybrid method to compute the solutions of an optimization Problem. The present hybrid algorithm is the synthesis of an artificial life algorithm and the random tabu search method. The artificial life algorithm has the most important feature called emergence. The emergence is the result of dynamic interaction among the individuals consisting of the system and is not found in an individual. The conventional artificial life algorithm for optimization is a stochastic searching algorithm using the feature of artificial life. Emergent colonies appear at the optimum locations in an artificial ecology. And the locations are the optimum solutions. We combined the feature of random-tabu search method with the conventional algorithm. The feature of random-tabu search method is to divide any given region into sub-regions. The enhanced artificial life algorithm (EALA) not only converge faster than the conventional artificial life algorithm, but also gives a more accurate solution. In addition, this algorithm can find all global optimum solutions. The enhanced artificial life algorithm is applied to the optimum design of high-speed, short journal bearings and its usefulness is verified through an optimization problem.

• IMMUNE NETWORK
• /
• v.22 no.2
• /
• pp.16.1-16.20
• /
• 2022

The gastrointestinal tract is the first organ directly affected by fasting. However, little is known about how fasting influences the intestinal immune system. Intestinal dendritic cells (DCs) capture antigens, migrate to secondary lymphoid organs, and provoke adaptive immune responses. We evaluated the changes of intestinal DCs in mice with short-term fasting and their effects on protective immunity against Listeria monocytogenes (LM). Fasting induced an increased number of CD103⁺CD11b^- DCs in both small intestinal lamina propria (SILP) and mesenteric lymph nodes (mLN). The SILP CD103⁺CD11b^- DCs showed proliferation and migration, coincident with increased levels of GM-CSF and C-C chemokine receptor type 7, respectively. At 24 h post-infection with LM, there was a significant reduction in the bacterial burden in the spleen, liver, and mLN of the short-term-fasted mice compared to those fed ad libitum. Also, short-term-fasted mice showed increased survival after LM infection compared with ad libitum-fed mice. It could be that significantly high TGF-β2 and Aldh1a2 expression in CD103⁺CD11b^- DCs in mice infected with LM might affect to increase of Foxp3⁺ regulatory T cells. Changes of major subset of DCs from CD103⁺ to CD103^- may induce the increase of IFN-γ-producing cells with forming Th1-biased environment. Therefore, the short-term fasting affects protection against LM infection by changing major subset of intestinal DCs from tolerogenic to Th1 immunogenic.

• Journal of the Korea Furniture Society
• /
• v.19 no.1
• /
• pp.11-21
• /
• 2008

For ages, Furniture, it has been improved for human aesthetic needs as well as human life as a tool. In the 1960s, it's the age of an ideological conflict. And its war made the hippie-culture come out. And, it was economically bountiful. The epoch-making development of the scientific technology made the result of space development, conquering the moon in the first of the mankind. Made the appearance of the Anti-design against the modern design which was the also, it traditional values and the mainstream. The plastic has merits, low-priced, light, being perfectly able to do mass production of the all kind of shapes' furniture with all-desired colors. It was the wonderful material for the expression of the short-life character, the irony, the kitsch, and an intentional decoration to being chased by anti-design. And the result, the plastic furniture in the people's daily-life has well represented with reflecting the mind of the people in that age.

• Journal of muscle and joint health
• /
• v.4 no.2
• /
• pp.249-261
• /
• 1997

The purpose of this study was to explore the effect of short term selp-help education on pain, depression, self-efficacy, and quality of life in patients having chronic arthritis. This program was carried out 3 hrs per week for 4 weeks by 3 small groups among 10 patients. Research design was a quasi-experimental study of nonequivalent control group pretest-posttest design. The subject of this study were 10 of experimental group and 10 of control group. Before and after 4 weeks program, quality of life, self-efficacy, depression, pain, ADL were measured. As a result, it was confirmed the self-help education was effective to increase quality of life, but self-efficacy, depression, pain, ADL were not improved. This suggests the replicate study to examine the effect of self-help education with the large samples of subjects having chronic arthritis.

• Proceedings of the KIEE Conference
• /
• 2008.07a
• /
• pp.1491-1492
• /
• 2008

This paper investigates life test of LED lighting module using accelerated life test method. Pooly designed LED lighting systems can experience a short life. By knowing the relationship between life and heat, LED system manufacturers can design and build long-lasting systems. In this study, various white LED from several other manufacturer were subjected to life tests at LED lated temperatures for prediction to life of LED lighting systems. Results show that the different LED products have various optical characteristic and different life values.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.7
• /
• pp.3007-3015
• /
• 2012

This study gave an insight into senior life plans and life satisfaction of the middle aged employee over 45 and under 60 years of age, listed in the KLIPS data for 2001 (4th year) and 2008 (11th year), so as to grasp levels of senior life plans of the middle aged employee as well as the longitudinal and short term effects of senior life plans on life satisfaction. The study findings showed as follow: First, For the period of years, the middle aged employees' health got worse and jobs got instable. Second, economic and physical senior life plans of the middle aged employee turned out below an average of three points which means preparations made below the normal level, whereas senior life plans in terms of relation and leisure and social activities came out with more than an average of three points, respectively, which means preparations made above the normal level. Third, as a result of looking into longitudinal effects of the 2001 senior life plans on life satisfaction, the level of senior life plans for leisure and social activities got higher, life satisfaction stayed higher in the year of 2001. In 2008, however, the higher level of economic plans for senior life came out with a higher rate of life satisfaction. From a short-term perspective, therefore, leisure and social activities to enjoy life impose a great impact on life satisfaction, whereas from a long-term viewpoint economic plans for senior life is regarded to be of greater importance.