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The Effect of Hydrogen Peroxide Bleaching on the Properties of Hardwood Kraft Pulp Absorbed with Birchwood Xylan

  • ;이상훈;이학래
    • 한국펄프종이공학회:학술대회논문집
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    • 한국펄프종이공학회 2010년도 춘계학술발표회 논문집
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    • pp.195-206
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    • 2010
  • Xylan can be applied to improve the strength properties of paper; however the optical properties, such as brightness, are decreased significantly. To solve that problem, an applicable bleaching process is therefore desired. The aim of this research was to investigate the impact of hydrogen peroxide bleaching on hardwood kraft pulp pretreated with birchwood xylan by measuring optical properties (whiteness, brightness, opacity) as well as physical properties (tensile index, tearing index, bulk) of handsheets made from the bleached pulp. Hydrogen peroxide bleaching, as a kind of totally chlorine free (TCF) bleaching method, is quite important industrially for chemical pulp. In our work, the process variables of peroxide bleaching including bleaching temperature, time, initial pH and $MgSO_4$ dosage were studied. The results showed that both good mechanical properties and optical properties could be achieved when the operating parameters were controlled properly and therefore hydrogen peroxide bleaching was proved to be a suitable method for bleaching hardwood kraft pulp with adsorption of birchwood xylan.

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화염의 칼라와 움직임을 이용한 화재감지 (A Fire Detection Using Color and Movement of Flames)

  • 조경래;배성호
    • 한국멀티미디어학회논문지
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    • 제17권1호
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    • pp.8-14
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    • 2014
  • 본 논문에서는 비디오 영상에서 화염의 칼라와 움직임 특징을 이용한 새로운 화재 감지 방법을 제안한다. 색차로부터 휘도를 효율적으로 분리하기 위하여 RGB 칼라를 YCbCr 성분으로 변환한다. 제안한 방법은 인접 영상들 간의 휘도의 차를 누적하여 화염의 움직임 영역을 검출하고, 화염의 색을 이용하여 화염 후보 영역을 생성한다. 최종적으로, 화염 후보 영역의 면적에 대한 시간적 변화를 이용하여 화염 영역을 결정한다. 실험 결과를 통하여 제안한 방법이 기존의 비디오 영상에서의 화재 감지 방법보다 화재 영역의 분류에 우수한 성능을 나타내는 것을 확인하였다.

한국 미기록 식물: 섬진달래(진달래과) (A new record of Rhododendron keiskei Miq. var. hypoglaucum Suto & Suzuki (Ericaceae) in Korea)

  • 양종철;권영한;지성진;신창호
    • 식물분류학회지
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    • 제45권3호
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    • pp.239-242
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    • 2015
  • 진달래과의 Rhododendron keiskei Miq. var. hypoglaucum Suto & Suzuki가 전라남도 여수시 섬지역에서 발견되었다. 이 종은 전체적으로 인편상 털이 분포하며, 꽃의 동아는 정단부에 1개가 달리고, 화서는 산형 총상화서를 가지며, 화관은 노란색을 띠는 백색에 외부에는 인편상 털이 있는 특징을 가지고 있어 한국에 분포하는 근연 분류군들과 구분된다. 국명은 생육지를 고려하여 '섬진달래'로 신칭하였고, 이에 대한 기재, 도해, 사진 및 검색표를 제시하였다.

자궁암 환자의 수신증으로 인한 소변불리와 조영제로 유발된 발진을 사상방으로 관리한 치험 1례 (A Case of Cervical Cancer Case with Urinary Disorder and Urticaria Managed by Sasang Constitutional Medicine)

  • 김은희;서영광;김달래;고병희;전성하;최원철;이수경
    • 사상체질의학회지
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    • 제19권3호
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    • pp.277-282
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    • 2007
  • 1. Objectives This paper reports a case of cervical cancer patient who showed positive results to Sasang Constitutional Medicine. The target symptoms were urinary disorder due to unilateral hydronephrosis and urticaria due to adverse drug reactions. 2. Methods We measured urinary output and interval. We evaluated skin urticaria by severity and size of itchy site. The patient treated using Sasang Constitutional Medicine. 3. Results and Conclusions Significant improvement was observed in urinary output and interval.

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강인한 손가락 끝 추출과 확장된 CAMSHIFT 알고리즘을 이용한 자연스러운 Human-Robot Interaction을 위한 손동작 인식 (A Robust Fingertip Extraction and Extended CAMSHIFT based Hand Gesture Recognition for Natural Human-like Human-Robot Interaction)

  • 이래경;안수용;오세영
    • 제어로봇시스템학회논문지
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    • 제18권4호
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    • pp.328-336
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    • 2012
  • In this paper, we propose a robust fingertip extraction and extended Continuously Adaptive Mean Shift (CAMSHIFT) based robust hand gesture recognition for natural human-like HRI (Human-Robot Interaction). Firstly, for efficient and rapid hand detection, the hand candidate regions are segmented by the combination with robust $YC_bC_r$ skin color model and haar-like features based adaboost. Using the extracted hand candidate regions, we estimate the palm region and fingertip position from distance transformation based voting and geometrical feature of hands. From the hand orientation and palm center position, we find the optimal fingertip position and its orientation. Then using extended CAMSHIFT, we reliably track the 2D hand gesture trajectory with extracted fingertip. Finally, we applied the conditional density propagation (CONDENSATION) to recognize the pre-defined temporal motion trajectories. Experimental results show that the proposed algorithm not only rapidly extracts the hand region with accurately extracted fingertip and its angle but also robustly tracks the hand under different illumination, size and rotation conditions. Using these results, we successfully recognize the multiple hand gestures.

일개 특성화 학교 북한이탈 청소년의 건강증진행위에 영향을 미치는 요인 (Influencing Factors on the Health Promotion Behaviors of North Korean Refugee Adolescent in a Specialization School)

  • 전은경;이진화;김순례;강민정;권인숙
    • 보건교육건강증진학회지
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    • 제30권3호
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    • pp.13-23
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    • 2013
  • Objectives: This study was conducted to find out health behaviors and health promotion behaviors and their influencing factors among North Korean refugee adolescents. Methods: All the 139 students registered in a specialization school which provided regular school curriculum for the North Korean refugee adolescents participated in the survey. Collected data were analyzed by descriptive statistics, t-test, ANOVA, and multiple regression analysis. Results: Current smoking, alcohol drinking and experience of depression in North Korean refugee adolescents were more prevalent than those of South Korean adolescents. Self-esteem, self-efficacy and social support were identified as factors affecting health promotion behavior. Conclusions: Health promotion program is needed to reduce the North Korean refugee adolescents' depression and to stop smoking and drinking. In the process of creating these programs, of creating program, we should consider self-esteem, self-efficacy and social support in the educational method to make these programs be effective.

운동유발성 기관지천식으로 오인된 성대 기능 이상 1례 (A Case of Vocal Cord Dysfunction Masqueraded as Exercised-Induced Asthma)

  • 조창래;심선진;박상현;남순열;고윤석
    • Tuberculosis and Respiratory Diseases
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    • 제52권3호
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    • pp.265-270
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    • 2002
  • 운동유발성 호흡곤란으로 내원하여 운동유발성 천식으로 치료 하였으나 증상 호전이 없어 운동후 기관지 내시경을 시행하여 성대기능이상을 확진하고 치료한 운동유발성 성대기능이상 1례를 문헌고찰과 함께 보고하는 바이다.

일 보건소 동단위 지역담당 방문간호서비스 성과 (A Study on Evaluation of District Visiting Nursing Services of Urban Health Center)

  • 유호신;황라일;진달래;석민현
    • 지역사회간호학회지
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    • 제16권2호
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    • pp.127-136
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    • 2005
  • Purpose: The purpose of this study was to present the outcomes of the district visiting nursing services. Method: We analyzed nursing records and inspected public health center data for evaluating nursing tasks. and conducted a telephone survey of 651 district inhabitants. Results: According to the result, the coverage of the district population, the rate of new registration and overall program activities increased. Meanwhile, accessibility of visiting health care, the level of health problem management, personal cognition and satisfaction concerning visiting nursing care increased, but there was little change in personal perception of health improvement. Furthermore, the status of client management was improved. In the analysis of participation in national cancer screening program, we found that there was twice higher participation in the district than others. Conclusion: We suggest that this district visiting nursing system takes responsibility for district inhabitant health management. Based on the study, we also suggest that the government and local autonomous entities should increase administrative and financial supports to execute the district-based visiting nursing system in wider areas.

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Accumulation of Dietary Conjugated Linoleic Acid (CLA) in Silkworm, Bombyx mori

  • Park, Chung-Gyoo;Kim, Seck-Jong;Ha, Nam-Gue;Park, Bong-Il;Ha, Yeong-Lae
    • Preventive Nutrition and Food Science
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    • 제6권1호
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    • pp.19-22
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    • 2001
  • Conjugated linoleic acid (CLA) exhibits potent anti-carcinogenic and other biological activities in several animal models. We report here that dietary CLA, chemically synthesized from corn oil, accumulates I silkworm, Bombyx mori, which is used as therapeutic agent for diabetes in Korea and Japan. Mulberry leaves treated with 0.1 or 10% CLA in ethanol were supplied to silkworms from the end of 3rd instar to the 3rd day of the 5th instar. Fresh mulberry leaves or leaves treated with 10% corn oil in ethanol were fed as a check treatment. the amount of total lipids in the larval body ranged from 17.4 to 19.1mg/g of body tissue, which was not significantly affected by the source of the diets. No CLA was found in the control silkworms. But the level of CLA significantly increased to 83.5 mg/g of fat, when fed with mulberry leaves treated with 10% CLA. Only trace amounts of CLA were detected in the larvae reared with check leaves and 0.1% CLA-treated leaves. Mulberry leaves treatd with corn oil or CLA were not palatable to the larvae, resulting in a reduction of larval weight. These results suggest that silkworms containing CLA in body lipids could be producted by dietary CLA.

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Statistical Analysis of the Usage Type of Online Cremation Reservation Service in Funeral Information System : Focused on the Public Cremation Facilities of Incheon Metropolitan City

  • Choi, Jae-sil;Kim, Jeong-lae
    • International Journal of Internet, Broadcasting and Communication
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    • 제10권4호
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    • pp.12-18
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    • 2018
  • As of 2016, the cremation rates in the capital area are 91.2% in Incheon Metropolitan City, 87.5% in Seoul Special City, and 87.1% in Gyeonggi-do Province, of which Incheon has the highest rate, and cremation of general corpses through the online cremation reservation service of the funeral information system is continuously increasing every year. And as of 2017, the ratio of the cremation for those outside the jurisdiction (residents of other regions) among the users of public cremation establishment in Incheon, is about 32%. As the supply capacity is expected to reach the limit within several years due to the increase in demand for such a cremation facility, I would like to suggest a policy as follows. The expansion of cremation supply capacity by increasing the number of operations in the cremation furnace; The attractions of operating funds through contracts for joint use of the cremation facility with other local governments and investment funds for the expansion of cremation facilities; The plan for controlling the demand in cremation such as an increase in cremation charge for those outside the jurisdiction(residents of other regions), should be considered.