• Journal of Sericultural and Entomological Science
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• v.41 no.3
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• pp.141-146
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• 1999

This study was designed to investigate the effects of silkworm powder (SWP) on oxygen radicals and their scavenger enzymes in serum of rats. Sprague Dawley (SD) male rats (160${\pm}$10g) were fed experimental diets (SWP-200and SWP-400 groups)added 200 and 400mg/kg BW/day for 6 weeks. Triglyceride (TG)levels were significantly inhibited (10% and 25%) in SWP-200 and SWP-400 groups, but there were no singificant differences in total, LDL-and HDL-cholesterol levels in both SWP-200 and SWP-400 groups. Hydroxyl radical ($.$OH) formations resulted in a marked decreases (about 20%) in both SWP-200 and SWP-400 groups compared with control group. Superoxide radical (O2.-)and hydrogen peroxide formations resulted in a significant decreases in SWP-400 group compared with control group. Lipid peroxide (LPO)and oxidized protein(>C=O group) productions resulted in a significant decreases (SOD) and catalase (CAT) activiteies were remarkably increased (10∼25% and 40∼50%)in SWP-200 and SWP-400groups. Glutathione peroxidase(GSHPX) activities were significantly increased (about 10%) in SWP-400 groups compared with control group. These results suggest that anti-aging effect of silkworm powder (SWP) may play a pivotal role in attenuation a various chronic degenerative diseases age-related changes.

• Journal of Life Science
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• v.11 no.2
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• pp.103-110
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• 2001

This study was designed to investigate the effects of silkworm(Bombyx moril L.) powder on oxidative stress and membrane fluidity in brain membranes of rats. Sprague-Dawley(SD) male rats(160$\pm$10 g) were fed basic diet(control group), and experimental diets(SWP-200 and SWP-400 groups) added 200 and 400mg/kg BW/day for 6 weeks. There were no significant differences in cholesterol levels of brain memberanes by administration of silkworm powder (SWP). Membrane fluidities were significantly increased(21.5% and 30.8%, respectively) in brain mitochondria of SWP-200 and SWP-400 groups compared with control group, but significant difference between brain microsomes could not obtained. Basal oxygen radicals (BORs) in brain mitochondria and mircrosomes were significantly inhibited(8.5% and 16.5%, 16.8%and 24.8%, respectively) by SWP-200 and SEP-400 groups compared with control group. Induced oxygen radicals(IORs) in brain mitochondria were significantly inhibited(16.6% and 21.4%, respectively)by sWP-200 and SWP-400 groups compared with control group, but IOR in brain microsome were significantly inhibited about 16.0% by SWP-400 groups only compared with control group. Lipid peroxide(LPO) levels were significantly decreaed(14.8%and 22.4%, respectively) in brain mitochondria of SWP-200 and SWP-400 groups compared with control group, but LPO level was significantly decreased about 16.0% in brain microsome of SWP-400 group only. Oxidized protein(OP) levels were remarkably decreased(about 14.8% and 16.5%, respectively) in brain mitochondria of SWP-200 and SWP-400 groups, but OP level was significantly decreased about 13.0% in brain microsome of SWP-400 group only compared with control group, Theses results suggest that administration of in brain microsome of SWP-400 group only compared with control group. These results suggest that administration of SWP may play effective role in attenuating an oxidative stress and increasing a membrane fluidity in brain membranes.

• Journal of Life Science
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• v.10 no.5
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• pp.496-503
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• 2000

This study was designed to investigate the effects of silkworm (Bombyx mori L.) powder on oxidative stress and membrane fluidity in liver membranes of rats. Sprague-Dawley (SD) male rats (160±10 g) were fed basic diet (control group), and experimental diets (SWP-200 and SWP-400 groups) added 200 and 400 mg/kg BW/day for 6 weeks. A significant differences between liver mitochondria and microsomes of SWP-200 and SWP-400 groups could not be obtained. Membrane fluidities were dose-dependently increased (14.8% and 28.5%, 20.0% and 29.9%) in liver mitochondria and microsomes of SWP-200 and SWP-400 groups compared with control group. Basal oxygen radicals (BOR) in liver mitochondria and mocrosomes were significantly inhibited (15.2% and 21.7%, 12.6% and 18.6%, respectively) by SWP-200 and SWP-400 groups compared with control group. Induced oxygen radicals (IOR) in liver microsomes were significantly inhibited (15.5% and 16.1%, respectively) by SWP-200 and SWP-400 groups compared with control group, but IOR in liver mitochondria was significantly inhibited about 12.0% by SWP-400 group only compared with control group. Lipid peroxide (LPO) levels were significantly decreased (14.4% and 9.1%, respectively) in liver mitochondria and microsomes of SWP-400 group only compared with control group. Oxidized protein (OP) levels were remarkably decreased about 12.7% and 16.3% in liver microsomes only of SWP-200 and SWP-400 groups, but significant difference between liver motochondria could not obtained. These results suggest that administration of SWP may play an effective role in a attenuating a oxidative stress and increasing a membrane fluidity in liver membranes.

• Journal of Life Science
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• v.10 no.4
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• pp.347-353
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• 2000

This study was designed to investigate the effects of silkworm (Bombyx mori L.) powder (SWP) on oxygen radicals and their scavenger enzymes in liver membranes of rats. Sprague-Dawley(SD) male rats(160$\pm$10g) were fed basic diet (control group), and experimental diets(SWP-200 and SWP-400 groups) added 200 and 400 mg/kg BW/day for 6 weeks. Hydroxyl radical (.OH) levels resulted in a consistent decreases (4.0% and 7.2%, 5.0% and 14.1%, respectively) in liver mitochondria and microsomes of SWP-200 SWP-400 groups compared with control group, and O2 radical level was significantly decreased about 12% in liver cytosol of SWP-400 group compared with control group. Lipid peroxide(LPO) levels were significantly decreased (14.4% and 9.1%, respectively) in liver mitochondria and microsomes of SWP-400 group only compared with control group. Oxidized protein (OP) levels were remarkably decreased about 12.7% and 16.3% in liver microsomes only of SWP-200 and SWP-400 groups, but significant difference between liver mitochondria could not obtained. Mn-SOD activities were remarkably increased (15.8% and 25.2%, respectively) in mitochondria of SWP-200 and SWP-400 groups, but significant difference between Cu, Zn-SOD activities in these group could be not obtained. GSHPx activity was significantly increased in liver cytosol of SWP-400 group compared with control group. These results suggest that silkworm powder may play an effective role in a attenuating a oxidative stress and increasing a scavenger enzyme activity in liver membranes.

• Journal of Life Science
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• v.10 no.6
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• pp.564-569
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• 2000

This study was designed to investigate the effect of silkworm (Bombyx mori L.) powder on lipofuscin, acetylcholine (ACh) and its related enzyme activities in brain of rats. Sprague-Dawley (SD) male rats ($160{\pm}10g$) were fed basic diet (control group), and experimental diets (SWP-200 and SWP-400 groups) added 200 and 400 mg/kg BW/day for 6 weeks. In case of liver membranes, lipofuscin (LF) levels resulted in a slight decreases (4.6% and 11.5%, respectively) in SWP-200 and SWP-400 groups compared with control group. But in case of barin as the most sensitive organ, LF levels were remarkably inhibited about 16.7% and 20.0% in SWP-200 and SWP-400 groups compared with control group. There were no significant differences in acetylcholine (ACh) syntheses as a very important neurotransmitter, and choline acetyltransferase (ChAT) activities as a synthesis enzyme of ACh, and acetylcholinesterase (AChE) activities as a hydrolysis enzyme, which were concerned in transmission of neuron through synapses in brain of SWP-200 and SWP-400 groups compared with control group. Monoamine oxidase-B (MAO-B) activities were significantly inhibited (about 10.2%) in brain of SWP-400 groups compared with control group. These results suggest that inhibiting effects of LF accumulation and MAO-B activity of silkworm powder (SWP) may play a pivotal role in attenuating a various age-related changes for improvement of brain function.

• Journal of Information Technology Applications and Management
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• v.20 no.3_spc
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• pp.259-278
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• 2013

At the center of the repeating evolution of IT industry, there is mobile computing in the ubiquitous environment, and the increasing usage of smart phones contribute more to its growth. P corporation co-developed with Google and implemented smart work system called SWP for the purpose of 'communication and collaboration with co-workers' beyond the general goal of increasing productivity and comfort of employees. The primary objective of this study is to objectively analyze the influence of the effect factor from end user's perspective and user satisfaction on SWP usage, intention for continuous usage and individual performance. To accomplish this research purpose, this study established research models and hypothesis by collective review about information system success models, and tested the research hypotheses using the structural equation modeling technique by data collected from 320 SWP system users of P corporation. Variations for system satisfaction evaluation standard are 1)SW system usage 2) intention for continuous usage 3) individual performance, effect variations are 1) social factors 2) technical factors 3) combination of social and technical factors. Therefore, this study is about influence factors on success of SWP system and how the factors impact the outcome. The test results of this research model is summarized as follows. Firstly, system user's satisfaction had positive impact on all three; SWP system usage, intention for continuous usage and individual performance. Secondly, social factor 'SWP control system' and technical factor 'information quality' and 'system quality' had positive impact on SWP system user satisfaction, while social factor 'shared value' and technical factor 'service quality' did not have significant effect on user satisfaction. Shared value however, had interactive effect with 'information quality' and 'service quality'. This study is expected to contribute to spread of academic research on smart work system by suggesting a model that can show important factors for corporation while explaining the successful implementation of SWP and its continuous usage.

• Venture DIGEST
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• s.55
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• pp.10-11
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• 2004

젊은 감각과 순수한 열정이 요구되는 시대이기 때문일까. 최근 창업하는 벤처 대표들은 다들 젊다. 나이는 숫자에 불과하다고 창업한지 벌써 18년을 훌쩍 넘긴 SWP신우전자 허훈 대표는‘여전히’젊다. 실제 나이보다 훨씬 젊어보인다는 것은‘열정적’이라는 것과 통할 수 있다. ‘나는 반드시 성공할 수밖에 없다’고 수없이 되뇌어온 그의 신념이 현재의 SWP신우전자를 낳았다.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.11a
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• pp.667-670
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• 2005

This study is concerned with application of SWP-2H with performance which could be improved compressive strength, crack control of high strength concrete ranged from 35MPa to 70MPa. Expermental data showed that initial. behavior of SWP-2H added concrete had a similar tendency that of non-added concrete. As well crack resulted from autogeneous and drying shrinkage and compressive strength were well controled or elevated by application of SWP-2H.

• Vacuum Magazine
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• v.2 no.4
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• pp.16-26
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• 2015

Carbon nanomaterials including nanocrystalline diamond and graphene films are expected to play a core role in $21^{st}$ century industries due to their amazing physicochemical properties. To achieve their practical utilization and industrialization, the development of their mass production technologies is strongly required. Recently, a surface wave excited plasma (SWP) which is produced using microwaves has been attracting special attentions as a candidate for the mass production technology of carbon nanomaterials. SWP can allow a low-temperature large-area plasma chemical vapor deposition (CVD) system. Here, this article introduces the promising SWP-CVD technology. Plasma characteristics in a SWP will be introduced in detail to help understanding how to use and control a SWP as a plasma source for CVD applications.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.01a
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• pp.123-124
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• 2021

본 연구의 목적은 SWP강화를 위한 교수법 개선 및 적용을 통해 교수자들 스스로 수업방식을 채택해보고 가지고 있는 경험과 노하우를 공유해 학습자 특성에 맞는 사회복지현장 실무형 수업방법을 적용하고 개선 방안을 모색하고자 하였다. 연구결과 첫째, 학습자 동기유발 적용 방안으로 복지현장의 유형별 사업 진행 모습 시청(유튜브 동영상), 사회복지현장의 실무자 초대 또는 인터뷰 영상, 복지현장에 진출한 선배와의 만남 등이 필요하다. 둘째, 학습자 참여 방안으로 복지현장에서 진행하는 행사 참여, 복지기관 홈페이지 또는 유튜브에 댓글(선플) 달기, 복지현장 탐방 또는 실무자와의 인터뷰 영상을 편집하여 제출하는 노력이 필요하다. 셋째, 상호작용 적용 방안으로 수업에 앞서 사회복지현장의 이야기를 다룬 기사, 에세이, 사진 등에 대한 소감으로 소통하는 방법과 SNS 토론(e-campus, 카카오톡 등)을 통해 복지현장에서 중요하게 다루어지는 이슈에 대한 토론 등 적용 방안이 필요하다.