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Effect of Bacterial and Algal Symbiotic Reaction on the Removal of Organic Carbon in River Ecosystem (하천 생태계에서 유기탄소 기질 제거에 조류와 세균의 공생작용이 미치는 영향)

  • 공석기;도시유끼나까지마
    • Journal of environmental and Sanitary engineering
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    • v.16 no.3
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    • pp.22-27
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    • 2001
  • It have been investigated how algal and bacterial symbiotic reaction influences on removal of organic carbon in river ecosystem. And artificial experimentation apparatus was made for algae'and bacteia'culture as lab scale. Investigating and researching minutely the change of concentration of organic carbon substrate and the change of population density of algae'and of bacteria'with this artificial experimentation apparatus, the next results could be obtained. 1. Successful decrease of DOC(dissolved organic carbon) could not be expected unless algal and bacterial biomass floe was nut formed effectively and unless biosorption was not proceeded effectively in the very culture system in which artificial synthetic wastewater was supplied continuously at constant rate. 2. In conditions of culture liquid of 1335 glucnse mg/L(type 1) and of 267 glucose mg:L(type 2), the algal dominant species was always Chlorella vulgaris in both types in which artificial synthetic wastewater were supplied continuously at constant rate and algae population density was around maximum 107 cells/mL. 3. It was around 108 ~ 107 cells/mL that the population density of heterotrophic bacterium. In culture medium systems type 1 and type 2 in which artificial wastewater were supplied continuously at constant rate, the same density appeared initially when using the population density of Escherichia coli w 3110 as indirect indicator. And this density decreased rapidly till the culturing date 35 days were passed away, while this density increased with gentle slope after same date and then the trend of change at type 2 was more severe than one at type 1. 4. When seeing such a change of population density of Escherichia coli w 3110, the growth of heterotrophic bacterium appeared as survival instinct pattern of broader requirement of nutrient at condition of low concentration of organic carbon substrate than condition of high concentration of same substrate.

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Development of Bolt Tap Shape Inspection System Using Computer Vision Technology (컴퓨터 비전 기술을 이용한 볼트 탭 형상 검사 시스템 개발)

  • Park, Yang-Jae
    • Journal of Digital Convergence
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    • v.16 no.3
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    • pp.303-309
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    • 2018
  • Computer vision technology is a component inspection to obtain a video image from the camera to the machine to perform the capabilities of the human eye with a field of artificial intelligence, and then analyzed by the algorithm to determine to determine the good and bad of production parts It is widely applied. Shape inspection method was used as how to identify the location of the start point and the end point of the search range, measure the height to the line scan method, in such a manner as to determine the presence or absence of the bolt tabs average brightness of the inspection area in a circular scan type value And the degree of similarity was calculated. The total time it takes to test in the test performance tests of two types of bolts tab enables test 300 min, and demonstrated the accuracy and efficiency of the inspection on the production line represented a complete inspection accuracy.

Simplified Finite Element Model of an Anchor Bolt Inserted Through Concretes Considering Clamping Forces (체결력을 고려한 콘크리트 삽입 앵커볼트의 간편 유한요소 모델)

  • Noh, Myung Hyun;Lee, Sang Youl;Park, Kyu Sik
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.26 no.4
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    • pp.293-300
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    • 2013
  • In this study we proposed a simplified finite element model of anchor bolt system inserted through concrete structures considering clamping forces. The three different finite element types using LS-DYNA are applied for numerical efficiency of the anchor bolt modeling. Combined beam and solid elements are used to reflect the tension state at internal part of anchor bolt due to torques. The clamping forces due to torques are considered by introducing a compression for a nut plane modeled by beam elements. The numerical examples show good agreement with different element types. Parametric studies are focused on the various effects of different element types on the induced axial and shear forces of anchor bolts considering clamping forces.

Proposal of an Application Characteristic Model of Information System for Construction Decision-making Support (건설 의사결정지원용 정보시스템 활용특성모델 제안)

  • Lee Jong-Kook
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2004.11a
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    • pp.145-152
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    • 2004
  • Many construction companies have developed many kinds of information system to integrate the information created in the phase of planning, design, procurement, construction, and maintenance of construction project. However, the previous researches for the state of applying information technologies and the efforts of the analysis of the present information system launched in domestic construction industry is very rare. There also has been short of research on the construction decision-making support theory in construction business and industry. Hence this paper would contribute in identifying the state of information technologies and the theory of decision-making support of the information system in general construction company. and suggest the characteristic model on the information system for the construction decision-making support. The model consists of the two dimensions; (1) organizational hierarchy (2) data analyzing technology. This research, especially, can be expected to initiate the discussion on framework for understanding the construction decision-making support system in construction industry. The model is nut a practical methodology, but a window that offers a new perspective un sources of information system in each construction company, and thus can provide a clue of the useful guide to construction information system development.

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Induction of Conditioned Taste Aversion to Korean Pine Nuts (Pinus koraiensis) Treated with Lithium Chloride in Red Squirrels (Sciurus vulgaris)

  • Kim, Eui-Kyeong;Kim, Won-Myeong;Park, Yung-Chul;Yoo, Byung-Ho;Kim, Jong-Kuk
    • Journal of Ecology and Environment
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    • v.31 no.4
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    • pp.341-344
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    • 2008
  • We investigated the responses of red squirrels to pine nuts (Pinus koraiensis) treated with Lithium Chloride (LiCl) and the potential of the chemical for inducing conditioned taste aversion (CTA) in red squirrels. In red squirrels, nut feeding declined dramatically during the first 4 days after feeding with LiCl-treated nuts. The ratio of LiCl-treated nuts eaten to total nuts eaten declined from the $1^{st}$ day in LC-1 and the $2^{nd}$ day in LC-2, along with a general reduction in quantity eaten. Thus, feeding with LiCl-treated nuts induced CTA from the 2nd day after feeding, and CTA remained constant until the $4^{th}$ day, but disappeared on the $5^{th}$ day. The squirrels ate an average of $757.0{\pm}106.1mg$ (n = 2, range $682.0\sim832.0$) of LiCl before dying on the $16^{th}$ day of the study. The lethal dose of LiCl was 2.32 mg LiCl/g body weight, and the average amount of LiCl needed to induce CTA was $23.0{\pm}4.24mg$ (20 mg in LC-1 and 26 mg in LC-2).

A Study on the Sensory Quality Features of Lamb Fillet Steaks with Crust Topping (Crust topping 양등심 스테이크 관능적 품질 특성 연구)

  • Seo, Min-Suk;Yoo, Seung-Seok
    • Culinary science and hospitality research
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    • v.17 no.4
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    • pp.295-306
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    • 2011
  • This study aims to increase the flavor of a lamb filet dish. The method used was as follows. Four kinds of crusts(mustard, herb & garlic, nuts, mushrooms) were made, and they were topped over lamb filet steaks. After cooking them, the good samples (mustard(MU3), herb & garlic(HG2), nuts(NC2), mushrooms(MC3)) by different materials through a sensory test were classified The selected samples were named as 1. Blank, 2. ECl(MU3), 3. EC2(HG2), 4. EC3(NC2), and 5. EC4(MC3). And then another sensory test was conducted targeting the samples to find out which crust had the best preference value. The results of the sensory test were statistically calculated Summarizing the results, all 4 kinds of samples topped with 4 different crusts showed much higher values than Blank, the control group. That indicates that the cooking method topping a crust on a lamb filet steak dish is very effective. Among them, the HG2 sample produced by mixing 70% of bread crumbs(115.5g) and 30% of garlic chop(49.5) with the base spice consisting of parsley 8g, rosemary 3g, basil 4g and olive oil 50g was evaluated as the best crust.

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Alternative Methods for Assessments of DEMs' Erros (DEM의 오차 평가 방법에 관한 연구)

  • Hwang, Chul-Sue
    • Journal of Korean Society for Geospatial Information Science
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    • v.7 no.2 s.14
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    • pp.23-34
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    • 1999
  • The most widely used measure for indicating the accuracy of DEM is RMSE(nut Mean Square Error), which is used by many national mapping agencies such as the USGS and the Ordnance Survey. Its prevalent use can be followed by the relative ease of calculation and understanding the concepts. However, there are many problems with the measure and the way from which it is often derived. First of all, the index does not involve my description of the mean donation between the two measures of elevation,. This means that it cannot interpret the distributions or patterns of errors involved in DEMs. The distribution of errors in DEMs will show some forms of spatial patterning. In order to explore the real quality of DEMs as a useful database, alternative approaches are needed. In this paper, we examined so called ESDA(Exploratory Spatial Data Analysis) approaches, which were attributed by both aspatial and spatial exploration methods. Our experimental research shows that even simple ESDA methods reveal new aspects of errors, especially spikes, striation, and terracing effect in DEMs, which my be ignored by RMSE measure.

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Survival of Cholangiocarcinoma Patients in Northeastern Thailand after Supportive Treatment

  • Thunyaharn, Nut;Promthet, Supannee;Wiangnon, Surapon;Suwanrungruang, Krittika;Kamsa-ard, Supot
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.11
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    • pp.7029-7032
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    • 2013
  • Background: Cholangiocarcinoma (CCA) is a very common cancer in Northeastern Thailand. Most CCA patients see a physician at a late stage when curative surgery is not possible. After diagnosis, they generally are treated by partial surgery/percutaneous drainage, chemotherapy and supportive treatment. Objective: This study aimed to assess the survival rates of CCA patients after supportive treatment. Methods: A retrospective cohort design was applied in this study. Data for 746 CCA patients were extracted from the hospital-based cancer registry of Srinagarind Hospital, Khon Kaen University. The patients were diagnosed (at least by ultrasonography) between 1 January, 2009 and 31 December, 2009 and then followed up for current status until 30 June, 2011. The cumulative survival rate was calculated by the Kaplan-Meier method, and independent prognostic factors were investigated using Cox regression. Results: The total follow-up time was 5,878 person-months, and the total number of deaths was 637. The mortality rate was therefore 10.8 per 100 person-year (95%CI : 10.1-11.7). The cumulative 3, 6, 9, 12 and 24 month survival rates were 59%, 39%, 31%, 24% and 14%, respectively. The median survival time after supportive treatment was 4 months. After adjusting for gender, age, stage, distant metastasis, histological grading and treatment, stage was a significant predictor of survival of CCA patients. Those in stage III and stage IV had a 6.78 fold higher mortality than the stage I and stage II cases (95% CI : 1.6-28.7). Conclusion: It is very important to encourage patients to see health personnel at an early stage.

Interesting Cases of Foreign Bodies in Air way -Report of Seven Cases- (최근 경험한 흥미있는 기도이물 7증례)

  • Lee, Hwa-Sik;Moon, Young-Chul;Cho, Seung-Ho;Kim, Hoon
    • Proceedings of the KOR-BRONCHOESO Conference
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    • 1982.05a
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    • pp.8.1-8
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    • 1982
  • Foreign bodies in the airway are very import-tant and not uncommon conditions in the field of E.N.T., and practically there are many reports of them. Occasionally, it can be followed by some pulmonary complications and technical difficulty to remove. Therefore, foreign body in the trachea-bronchial tree is serious and, on occasion, fatal. Recently, the authors experienced 7 interesting cases of foreign bodies in the airway and a brief review of literature was made. Case 1. (1 year old male): A bit of walnut was coughed out spontaneously. Case 2. (2 years old male): A bit of raw chestnut was removed from the right main bronchus. Case 3. (21 Years old male): A pushpin was removed from the left main bronchus. Case 4. (1 year old male): A kind of bean was removed from the right main vronchus. Case 5. (4 years old male): A coiled steel spring (1.1cm$\times$2cm) was removed from the subglottic region. Case 6. (5 years old female): A shell of pine nut which had been impacted in the wall of right main bronchus was removed during right middle and lower lobectomy. Case 7. (2 years old male): A metal nail was removed from the rightposterior basal segmental bronchus during right lower lobectomy.

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Micropropagation of Superior Variety of Japanese Pepper Tree (Zanthoxylum piperitum Dc.) (수형목 민초피나무의 기내 대량 증식)

  • Sung Ho SON;Seong Doo HUR;Jung Hee KIM;Yun Hee LEE;Mee Hee KIM;Jin Seon PARK;Young Wook LEE;Heung Kyu MOON;Yang YOUN
    • Korean Journal of Plant Tissue Culture
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    • v.22 no.3
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    • pp.127-130
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    • 1995
  • Japanese pepper (Zanthoxylum piperitum Dc.) tree of selected genotype was propagated by a two-step method. Among the media tested, BTM promoted shoot height growth and DKW revealed as superior to micro-canopy increment Multiple shoot formation was greatest when the single shoot were subcultured on medium containing 0.89 $\mu$M BA alone. The numbers of survival shoots could be markedly increased by acclimatization of the multiplied shoots itself in plastic Petridish (punctured with pin on the top) for two weeks and subsequently transplanting each shoot onto peat plug system. After transplanting the micropropagules onto pots, prickliness characteristics seem to be transmitted to all plane produced from selected genotype.

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