• Title/Summary/Keyword: PC Bang

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Properties of UV Curable Coating Film Containing Colloidal Silica Acrylate (콜로이드실리카아크릴레이트를 함유한 자외선 경화형 코팅필름의 특성)

  • Lee, Bong-Woo;Hong, Jin-Who;Bang, Moon-Soo;Oh, Hyung-Sik;Kim, Dae-Jun;Kim, Hyun-Joong
    • Journal of Adhesion and Interface
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    • v.4 no.1
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    • pp.9-17
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    • 2003
  • The UV hard coating materials are attracting more and more attention to modern industry, in terms of the development of low or non solvent coating materials which will contribute to economizing both materials and energy and to reducing pollution. This study was performed in order to invent UV curable coating materials containing colloidal silica which have actual industrial applications. As results of experiments, the oligomers type and the concentration of colloidal silica acrylate oligomer (SAOC) have an influence on various especially, The properties of UV hardening cooling, such as chemical, abrasion resistance and weatherability, were greatly enhanced, the impact properties of coated polycarbonate substrate were improved compared with the noncoated that. The UV cured films containing 30 wt% SAOC obtained showed the best properties.

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Development of Automatic Shear-wave Source for Downhole Seismic Method (다운홀 탄성파 기법용 전단파 자동 가진원의 개발)

  • Bang, Eun-Seok;Sung, Nak-Hoon;Kim, Jung-Ho;Kim, Dong-Soo
    • Journal of the Korean Geotechnical Society
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    • v.23 no.11
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    • pp.27-37
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    • 2007
  • Downhole seismic method is very economic and easy to operate because it uses only one borehole and simple surface source to obtain the shear wave velocity profile of a site. In this study, automatic shear wave source was developed for efficient downhole seismic testing. This source is motor-spring type and easy to control. It can lessen the labor of operator and the working time. Moreover, it can provide better and repetitive signals for data interpretation. By combining developed automatic source with automatic receiver system, PC based data acquisition system, advanced managing program, and semi-automatic downhole performing system were constructed. Through comparison test with manual source, advantages of automatic source were verified. Constructed semi-automatic downhole testing system including automatic shear wave source was applied to the soft soil site. The applicability and reliability were verified and the importance of automating testing system for obtaining reliable result was emphasized.

A Design and Implementation of Multimedia Retrieval System based on MAF(Multimedia Application File Format) (MAF(Multimedia Application File Format) 기반 멀티미디어 검색 시스템의 설계 및 구현)

  • Gang Young-Mo;Park Joo-Hyoun;Bang Hyung-Gin;Nang Jong-Ho;Kim Hyung-Chul
    • Journal of KIISE:Computer Systems and Theory
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    • v.33 no.9
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    • pp.574-584
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    • 2006
  • Recently, ISO/IEC 23000 (also known as 'MPEG-A') has proposed a new file format called 'MAF(Multimedia Application File Format)[1]' which provides a capability of integrating/storing the widely-used compression standards for audio and video and the metadata in MPEG-7 form into a single file format. However, it is still very hard to verify the usefulness of MPEG-A in the real applications because there is still no real system that fully implements this standard. In this thesis, a design and implementation of a multimedia retrieval system based on MPEG-A standard on PC and mobile device is presented. Furthermore, an extension of MPEG-A for describing the metadata for video is also proposed. It is selected and defined as a subset of MPEG-7 MDS[4] and TV-anytime[5] for video that is useful and manageable in the mobile environments. In order to design the multimedia retrieval system based on MPEG-A, we define the system requirements in terms of portability, extensibility, compatibility, adaptability, efficiency. Based on these requirements, we design the system which composed of 3 layers: Application Layer, Middleware Layer, Platform Layer. The proposed system consists of two sub-parts, client-part and server-part. The client-part consists of MAF authoring tool, MAP player tool and MAF searching tool which allow users to create, play and search the MAF files, respectively. The server-part is composed of modules to store and manage the MAF files and metadata extracted from MAF files. We show the usefulness of the proposed system by implementing the client system both on MS-Windows platform on desk-top computer and WIPI platform on mobile phone, and validate whether it to satisfy all the system requirements. The proposed system can be used to verify the specification in the MPEG-A, and to proves the usefulness of MPEG-A in the real application.

A Reading Trainning Program offering Visual-Auditory Cue with Noise Cancellation Function (잡음제거 기능을 갖춘 시-청각 단서 제공 읽기 훈련 프로그램)

  • Bang, D.H.;Kang, H.D.;Kil, S.K.;Lee, S.M.
    • Journal of rehabilitation welfare engineering & assistive technology
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    • v.2 no.1
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    • pp.35-43
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    • 2009
  • In this paper, we introduce a reading training program offering visual-auditory cue with noise cancellation function (RT program) developed by us. The RT program provides some training sentences with visual-auditory cues. Motor speech disorder patients can use the visual and/or auditory cues for reading training. To provide convenient estimation of training result, we developed a noise cancellation algorithm. The function of the algorithm is to remove noise and auditory-cues which are recorded with reading speech at the same time while patient read the sentences in PC monitor. In addition, we developed a function for finding out the first starting time of reading sound after a patient sees a sentence and begins to read the sentence. The recorded speeches are acquired from six people(three male, three female) in four noisy environments (interior noise, white noise, car interior noise, babble noise). We evaluated the timing error for starting time between original recorded speech and processed speech in condition of executing noise cancellation function and not executing. The timing error was improved as much as $4.847{\pm}2.4235[ms]$ as the effect of noise cancellation. It is expected that the developed RT program helps motor speech disorder patient in reading training and symptom evaluation.

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Anti-Cancer Effect of the Combination of Thiacremonone and Docetaxel by Inactivation of NF-κB in Human Cancer Cells

  • Ban, Jung-Ok;Cho, Jin-Suk;Hwang, In-Guk;Noh, Jin-Woo;Kim, Wun-Jae;Lee, Ung-Soo;Moon, Dong-Cheul;Jeong, Heon-Sang;Lee, Hee-Soon;Hwang, Bang-Yeon;Jung, Jae-Kyung;Han, Sang-Bae;Hong, Jin-Tae
    • Biomolecules & Therapeutics
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    • v.17 no.4
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    • pp.403-411
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    • 2009
  • Thiacremonone, the main component isolated from heated garlic (Allium sativum L.), is interested for using as a cancer preventive or therapeutic agent since garlic has been known to be useful plant in the treatment of cancers. Nuclear factor kappaB (NF-${\kappa}B$) is constitutively activated in the prostate cancer and activation of NF-${\kappa}B$ is implicated in drug resistance in cancer cells. Docetaxel, a semisynthetic analog of paclitaxel, is an antineoplastic drug widely used for advanced various cancer. In previous studies, we found that thiacremonone inhibited activation of NF-${\kappa}B$ in cancer cells and marcrophages. In the present study, we investigated whether thiacremonone could increase susceptibility of prostate cancer cells (PC-3 and DU145) to docetaxel via inactivation of NF-${\kappa}B$. We found that the combination treatment of thiacremonone (50 ${\mu}g$/ml) with docetaxel (5 nM) was more effective in the inhibition of prostate cancer cell growth and induction of apoptosis accompanied with the significant inhibition of NF-${\kappa}B$ activity than those by the treatment of thiacremonone or docetaxel alone. It was also found that NF-${\kappa}B$ target gene expression of Bax, caspase-3 and caspase-9 was much more significantly enhanced, but the expression of Bcl-2 was also much more significantly inhibited by the combination treatment. These results indicate that thiacremonone inhibits NF-${\kappa}B$, and enhances the susceptibility of prostate cancer cells to docetaxel. Thus, thiacremonone could be useful as an adjuvant anti-cancer agent.

Operational Characteristics of a Dry Electrostatic Precipitator for Removal of Particles from Oxy Fuel Combustion (순산소 연소 배출 입자 제거용 건식 전기집진장치 운전 특성)

  • Kim, Hak-Joon;Han, Bang-Woo;Oh, Won-Seok;Hwang, Gyu-Dong;Kim, Yong-Jin;Hong, Jeong-Hee
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.34 no.1
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    • pp.27-34
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    • 2010
  • In a test duct with closed configuration, particle removal performance of an edge-plate type electrostatic precipitator (ESP) was evaluated at a high flow rate in $CO_2$ rich environments by changing gap distances between collection plates, concentrations of $CO_2$, particle sizes, types of electrodes, and types of power supplies. At the same experimental conditions, collection efficiency of particles with the mean particle size, 300 nm, decreased as the gap distance and $CO_2$ concentration increased because of low electrostatic force and low discharged current. In addition, as the particle size increased, the efficiency increased because of high charging rate of the large particles. With the electrode type which has higher surface area of a discharging plate and with the power supply which applied 25 kHz-pulsed DC voltages, the removal efficiency was high even in rich $CO_2$ condition due to high electrostatic force at the same power consumption.

Relationships among Perceived Life Stress, Self-esteem and Depression in Middle-Aged Women (중년여성의 지각된 생활 스트레스와 자아존중감 및 우울의 관계)

  • Park, Geum-Ja;Lee, Ji-Hyun;Kim, Mi-Ok;Bang, Boo-Kyeong;Youn, Su-Jung;Choi, Eun-Ju
    • Research in Community and Public Health Nursing
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    • v.13 no.2
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    • pp.354-362
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    • 2002
  • Objectives: This study was conducted to examine the relationships among perceived life stress, self-esteem, and depression in middle-aged women. Methods: Data were collected from March 30 to May 25, 2000. The study subjects were 123 middle-aged women living in Pusan. The instruments used for this study were the Perceived Life Stress scale developed by Lee (1984), based on the original scale designed by Yu, et al. (1994), Self-esteem scale developed by Rho, et al. (1997), and the Depression scale developed by Ahn (1988). For data analysis, the SPSS PC+ was utilized, by which frequency and percentage, mean and standard deviation, t-test, ANOVA, Sheffe's test and Pearson's correlation coefficients were examined. The reliability of the instruments were tested by Cronbach's $\alpha$, showing the internal consistency of 0.7328 for the self-esteem scale. and 0.8987 for the depression scale. Results: 1) The results showed a relatively low perceived life stress score in the middle-aged women with a mean and standard deviation of 363.18 and 72.92 (range: .00 - 1877.38). 2) The results showed a relatively high self-esteem score in the middle-aged women with a mean and standard deviation of 29.77 and 5.06 (range: 10 - 40). 3) The results showed a relatively high depression score in the middle-aged women with a mean and standard deviation of 39.46 and 9.38 (range: 0 - 61). 4) There were no statistically significant differences in perceived life stress by demographic related factors. 5) There were statistically significant differences in self-esteem by health status (F=8.930, p= .000) and economic status (t=4.792, p= .010). 6) There were statistically significant differences in depression by age (F=3.770, p= .0261). education (F=4.850, p= .003) and regularity of menstrual cycle (F=13.180, p= .000). 7) There was no statistically significant correlation between perceived life stress, and self-esteem in the middle-aged women (r=-.077, p= .399). 8) There was no significant correlation between perceived life stress. and depression in the middle-aged women (r= .010, p= .916). 9) There was a significant negative correlation between self-esteem, and depression in the middle-aged women (r=- .359, p= .000). Conclusion: Higher self-esteem was related to a lower depression status. Therefore, it is necessary to elevate the level of self-esteem in order to reduce the level of depression in middle-aged Korean women.

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The Study on the Quality of Life for the Mothers of Hospitalized Chronic Pediatric Patients (만성질환아 어머니의 삶의 질에 관한 연구)

  • Choi Myung Ae;Lee Hyun Sook;Kim Dae Hee;Park Myung Hee;Yoon So Young;Cho Yeon Hee;Bang Kyung Sook;Park Yeon Hwan
    • Child Health Nursing Research
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    • v.6 no.2
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    • pp.249-261
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    • 2000
  • The purpose of this study were to identify the quality of life for the mothers of hospitalized chronic pediatric patients, and to explore the factors affecting the QOL of those mothers. The subjects were 201 mothers whose children had hospitalized at one University hospital with chronic diseases. Data were collected from the December, 1997 to December, 1998. We used a revised QOL instrument consisting of 34 items, 5 point likert scale based on the Noh's QOL instrument. The revised QOL consists of six subscales, those are physical status and function, self esteem, emotional status, economic status, relationship with family members, and relationship with neighborhood. Data were analyzed by t-test, ANOVA, Pearson's correlation using SPSS-PC. The results were as follows: 1. The mean score of quality of life for the mothers of chronic pediatric patients was 100.31, and item mean was 2.95. In subscale analysis, item mean of economic status was the lowest, and that of relationship with family members was the highest. 2. Correlations between characteristics of chronic pediatric patients, their mothers and QOL of mothers were as follows; 1) Total QOL of mothers had a significant positive relationship with progressing time relapse after diagnosing and age of mothers. There was a significant negative relationship between the total QOL of mothers and number of hospitalization of their children. 2) QOL on self esteem and economic status had a significant relationship with age of pediatric patients, the time relapse after diagnosis, and age of mothers. Total number of family members and QOL on economic status showed a significant positive relationship. QOL on emotional status, economic status, and relationship with family members of mothers showed negative correlations with the number of hospitalization of their children. 3. Followings were the result of difference in QOL among different demographic cha- racteristics of the subjects. 1) QOL on economic status of mothers was significantly higher when fathers of pediatric patients had jobs. 2) Total QOL score, QOL on emotional status, and QOL on relationship with neighborhood were significantly higher when mothers of pediatric patients had spouses. 3) QOL on self esteem of mothers was significantly higher when mothers had religion. 4. Followings were the result of difference in QOL among different diagnosis of the children. 1) Total QOL score of mothers whose children had congenital heart disease was higher than that of mothers whose children had leukemia and cancer. 2) QOL on emotional status, economic status, and relationship with family members of mothers whose children had congenital heart disease were higher than those of mothers whose children had leukemia, cancer, and epilepsy.

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A Study on the Activities of Daily Living Adaptation of Spinal Cord Injured Patients (척수손상자의 일상생활적응에 관한 연구)

  • Son, Kyung-Hyun;Kim, Chan-Kyu;Bang, Yoo-Soon
    • Journal of Korean Physical Therapy Science
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    • v.10 no.1
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    • pp.47-57
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    • 2003
  • The purpose of this study was to evaluate the problem on activities of daily living ; the problem which spinal cord injured patients have when they adapt in daily living ; Subjects were 113 members who used the hospital which is located in Kwangju-city from November 20, 2001 to May 20, 2002. The evaluation of the ADL was performed according to MBI and collected data were statistically analysed by SPSS PC for paired Chi-square test T-test, One way ANOVA and Duncan's post-hoc test. The result's were as follows; 1. Modified Barthel Index average mark was $63.77{\pm}33.60$ points and MBI score distribution according to characteristics of injury is as following. 1) A patient who had long duration of injury, small injury region, incomplete paralysis in paralysis degree, paraplegia in paralysis type got high MBI score as statistical and significantly(p<0.05). 2. Society adaptation state by characteristics of spinal cord injured is an following. 1) After lapse of time of disease, a patient who is injured for a long term present surrounding environmental problem, a patient who is injured for a short term shows psychological problem. In society activity, as lapse of time of disease is long, patient did many hobby activity and same private club, on the other hand as lapse of time of diseases is short, the others appeared high and significantly as statistical(p<0.01). 2) In society activity by injury region, cervical injury and thoracic injury did more hobby activity than lumbar injury and in lumbar injury same private club or religion life appeared higher than thoracic injury of cervical injury significantly as statistical(p<0.01). 3) In walk method by paralysis degree Complete paralysis had more wheelchair life than incomplete paralysis(p<0.01). 4) In serious problem by paralysis type psychological problem in quadriplegia and surrounding environmental problem in paraplegia appeared high and significantly as statistical(p<0.01). 3. In society adaptation state by MBI score difference between variables appeared but it wasn't significantly.

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Antioxidative Activity of the n-Hexane Fractions from Spatholobus suberectus (SS), Scutellsria barbata (SB), Psoralea corylifolia (PC), Curcuma zedoaria (CZ), Schisandra chinensis (SC), and Corydalis turtschaninovii (CT) (계혈등, 반지련, 보골지, 봉출, 오미자, 현호색 헥산 분획층의 항산화활성)

  • Choi, Eun-Jeong;Kim, Se-Hun;Shim, Sang-Hee;Chung, Hyun-Jung;Bang, Woo-Suk
    • Korean Journal of Food Science and Technology
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    • v.44 no.4
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    • pp.493-497
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    • 2012
  • The objective of this study was carried out in order to evaluate the antioxidative activities of n-hexane fractions from medicinal herbs. Certain parts from 6 species of edible and medicinal herbs were extracted with methanol. Radical scavenging activity of the n-hexane fractions against DPPH and ABTS radicals were observed to be high in Psoralea corylifolia, and Scutellsria barbata; it also significantly increased (p<0.05). For a comparison of the effect of various concentration of fractions, as the concentration of treatment increased, the antioxidative effects on radical scavenging activity also oncreased; yet it was not significant. The antioxidative effect of medicinal plants was dependent on the concentration but was not significant. Therefore, these results indicate that edible wild plants, such as Psoralea corylifolia, and Scutellsria barbata may be useful as potential antioxidant sources for improving the human antioxidant defense system against disease.