• Title/Summary/Keyword: 아산

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A Comparative Study of Geological Characteristics between Traditional Spa and Newly-established Spa (전통온천과 신설온천의 지질학적 특성 비교)

  • Lee, Young-Hee
    • Journal of the Korean Geographical Society
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    • v.42 no.6
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    • pp.851-862
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    • 2007
  • The main reason of environmental pollution and destruction due to an indiscreet development of spa is the law of spa in use. According to the law of spa, the water of spa is ordained not mineral component and its efficacy but water temperature of over $25^{\circ}C$. Therefore this research was to analyze the differences between traditional spa and newly-established spa based on heat flow, geological rock, and fault relating to spa in order to call attention to a revision of the law of spa. According to the results, the location of the traditional spas was in accord with places which are Pohang, Bugok, Dongrae and Haeundae-gu of Busan, Uljin, Chungju, Usung-gu of Daejeon, Yesan, Asan, and Ichon. The heat flow of these places is over 67mW/m2 that is an average of South Korea. Relating to a fault, 92.3% of the traditional spas concurs with a fault and 33.5% of newly-established spa is in accord with a fault. 58.2% of the traditional spas and 42.7% of the newly-established spa are consistent with the granite.

Radiographic Prognostic Criteria of Extracorporeal Shock Wave Lithotripsy for Pancreatic Ductal Stones (체외충격파쇄석술 적용을 위한 췌관결석의 방사선학적 선택)

  • Lee, Won-Hong;Yang, Seon-Wook;Uhm, Joon-Yong;Cho, Cheong-Chan;Ryu, Meung-Sun;Kim, Keon-Chung
    • Journal of radiological science and technology
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    • v.25 no.2
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    • pp.65-70
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    • 2002
  • The pain of chronic pancreatitis associated intraductal stones is related to increased intraductal pressure. Decom-pression of the pancreatic duct along with extraction of stones are the goals of a combined endoscopic-extracorporeal shock wave lithotripsy approach. The aim of this study is to define radiographic prognostic criteria for better complete free rate of pancreatic head and body ductal stones for extracorporeal shock wave lithotripsy. Fifty-nine patients with chronic pancreatitis were treated by extracorporeal shock wave lithotripsy for endoscopically unretrievable stones. The stones on endoscopic retrograde pancreatograms were classified into four characteristics including number, size of longest diameter, density compared with vertebral body, and shape. Complete stone free were obtained in 45 of 59(76.3%). Pancreatic ductal stones with radiographic characteristics including higher density than vertebral body, square shape, and rim calcified stones were hindrance factors for extracorporeal shock wave lithotripsy. We propose that patients with rim calcified stone of our three hindrance factors should be treated by other technique.

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Impact of Psychological Empowerment on Service Orientation and Organizational Performance in Private Security Guards (시큐리티 요원의 심리적 임파워먼트가 서비스지향성 및 조직성과에 미치는 영향)

  • Kim, Eui-Young;Lee, Jong-Hwan
    • Korean Security Journal
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    • no.28
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    • pp.7-31
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    • 2011
  • The purpose of this study was to examine the relationship of the psychological empowerment of security guards to their service orientation and organizational performance. The subjects in this study were 300 security guards who were selected by purposive sampling from the population that consisted of the workers in private security agencies located in the cities of Chungan and Ahsan in 2011. After a survey was conducted, the answer sheets from 271 respondents were analyzed. The statistical package SPSS WIN 18.0 was employed to make a factor analysis, reliability analysis, multiple regression analysis and path analysis. The findings of the study were as follows: First, psychological empowerment affected service orientation. Better meaning and better self-determination led to better service human resources management, better service leadership and better service encounter management. Second, psychological empowerment exerted an influence on organizational performance. Stronger impact and better meaning led to stronger organizational commitment, higher job satisfaction and better performance. Third, service orientation had an impact on organizational performance. Better service human resources management, better service leadership and better service encounter management were followed by stronger organizational commitment, better job satisfaction and higher performance. Fourth, psychological empowerment exercised a firsthand and secondhand influence on service orientation and organizational performance. Given the findings of the study, managers of security agencies should keep in mind the unique working environments of employees, and they should empower employees to show what they can do in consideration of their changing working environments and let them assume the responsibility for their own job performance. That will encourage them to provide better service for customers, which will serve, in turn, to bolster the organizational performance.

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MARYBLYT Study for Potential Spread and Prediction of Future Infection Risk of Fire Blight on Blossom of Singo Pear in Korea (우리나라 신고배 화상병 꽃감염 확산 가능성 및 미래 감염위험 예측을 위한 MARYBLYT 연구)

  • Kim, Min-Sun;Yun, Sung-Chul
    • Research in Plant Disease
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    • v.24 no.3
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    • pp.182-192
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    • 2018
  • Since fire blight (Erwinia amylovora) firstly broke out at mid-Korea in 2015, it is necessary to investigate potential spread of the invasive pathogen. To speculate environmental factors of fireblight epidemic based on disease triangle, a fire blight predicting program, MARYBLYT, was run with the measured meteorological data in 2014-2017 and the projecting future data under RCP8.5 scenario for 2020-2100. After calculating blossom period of Singo pear from phenology, MARYBLYT was run for blossom blight during the blossom period. MARYBLYT warned "Infection" blossom blight in 2014-15 at Anseong and Cheonan as well as Pyungtak and Asan. In addition, it warned "Infection" in 2016-17 at Naju. More than 80% of Korean areas were covered "Infection" or "High", therefore Korea was suitable for fire blight recently. Blossom blight for 2020-2100 was predicted to be highly fluctuate depending on the year. For 80 years of the future, 20 years were serious with "Infection" covered more than 50% of areas in Korea, whereas 8 years were not serious covered less than 10%. By comparisons between 50% and 10% of the year, temperature and amount of precipitation were significantly different. The results of this study are informative for policy makers to manage the alien pathogen.

Polygonal Grain-Based Distinct Element Modelling of Mechanical Characteristics and Transverse Isotropy of Rock (다각형 입자 기반 개별요소모델을 통한 암석의 역학적 특성과 횡등방성 모사)

  • Park, Jung-Wook;Park, Chan;Ryu, Dongwoo;Choi, Byung-Hee;Park, Eui-Seob
    • Tunnel and Underground Space
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    • v.26 no.3
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    • pp.235-252
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    • 2016
  • This study presents a methodology to reproduce the mechanical behavior of isotropic or transversely isotropic rock using the polygonal grain-based distinct element model. A numerical technique to monitor the evolution of micro-cracks during the simulation was developed in the present study, which enabled us to examine the contribution of tensile cracking and shear cracking to the progressive process of the failure. The numerical results demonstrated good agreement with general observations from rock specimens in terms of the behavior and the evolution of micro-cracks, suggesting the capability of the model to represent the mechanical behavior of rock. We also carried out a parametric study as a fundamental work to examine the relationships between the microscopic properties of the constituents and the macroscopic behavior of the model. Depending on the micro-properties, the model exhibited a variety of responses to the external load in terms of the strength and deformation characteristics. In addition, a numerical technique to reproduce the transversely isotropic rock was suggested and applied to Asan gneiss from Korea. The behavior of the numerical model was in good agreement with the results obtained in the laboratory-scale experiments of the rock.

Characterization of Weed Occurrence in Garlic and Red Pepper Fields (마늘 및 고추 경작지(耕作地)에서의 잡초발생(雜草發生) 특성(特性)에 관(關)한 연구(硏究))

  • Woo, I.S.;Pyon, J.Y.
    • Korean Journal of Weed Science
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    • v.8 no.1
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    • pp.1-8
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    • 1988
  • In order to get basic information for establishing weed control methods, weed distribution was surveyed at 15 days interval in garlic and red pepper fields at 8 locations in Chungnam Province. In garlic fields, 68 weed species(27 families) were distributed. Portulaca oleracea, Chenopodium album and Digitana sanguinalis were most dominant and Equisetum arvense, Alopecurus aequalis, and Setaria viridis dominant among them. Highest number of weeds emerged in May and dry weight or weeds was more heavy in June and summer broadleaf weeds were most abundant throughout garlic growing period. In red pepper fields, 38 weed species(17 families) were distributed, D. sanguinalis, Cyperus amuricus and P. oleracea were most dominant and Echinochloa crus-galli, Eleusine indica, D. violascens, and Centipeda minima also dominant among them. The highest number of weeds were emerged in June and summer, grasses and summer broadleaf weeds were more abundant in June and July. Seasonal Shannon's diversity index(H'), maximum diversity(Hmax') and eveness(J') for the Shannon diversity index, and Simpson index were high in both red pepper and garlic fields. Interspecific competition(probability for interspecific encounter) was more severe than intraspecific competiton.

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Differentiation of indigenous balloon flower (Platycodon grandiflorum DC.) germ lines in South Korea by using RAPD analyses (RAPD분석 기술을 이용한 토종도라지의 기원 분석)

  • Kim, Tae-Won;Lee, Soo-Jin;Kim, Man-Bae;Park, Chun-Geon;Shin, Yong-Wook;Cho, Young-Son;Lee, Shin-Woo
    • Journal of Plant Biotechnology
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    • v.41 no.1
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    • pp.19-25
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    • 2014
  • The total production volume has been sharply increased from year 2008 in Gyeongnam province, South Korea by the policy of preservation and promotion of indigenous balloon flower germ lines. In an attempt to assist the Gyeongnam province's policy, in this study, we tried to establish a technique to differentiate the indigenous balloon flower germ lines with those collected within South Korea and China. Our preliminary results indicated that RAPD analyses with five different primers exhibited high frequency of polymorphic DNA bands up to 76.9% and phylogenetic tree indicated that some of the indigenous lines can be easily differentiated with others. However, it was suggested that more advanced techniques such as single nucleotide polymorphic markers need to be developed in particular, by using extra-chromosomal DNA.

Regional Citrate Anticoagulatinln for Continuous Renal Replacement Therapy in Children (소아의 지속적 신대체요법에서 Citrate 항응고요법의 경험)

  • Hahn Hye-Won;Park Young-Seo
    • Childhood Kidney Diseases
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    • v.9 no.1
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    • pp.76-82
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    • 2005
  • Purpose : Regional anticoagulation with trisodium citrate for continuous renal replacement therapy(CRRT) is an effective and safe method, with lower bleeding risk. However it is not widely used because of complex current protocols used to prevent anticipated metabolic derangements. We evaluated simplified regional anticoagulation protocols with ACD-A(R) solution and commercially available calcium-containing dialysis solution. Methods : The medical records of twenty-eight patients who underwent CRRT were reviewed. Hemofilter life span according to the anticoagulation method used was compared, and laboratory findings at Pre- and 48 hours post-CRRT initiation were compared in the citrate-based CRRT group. Results : Of the twenty-eight Patients, five patients underwent citrate-based CRRT Hemofilter life span was 1.60 $\pm$ 0.72 days, showing no significant differences with the hemofilter life span in the heparin based and LMWH based CRRT group. No patients experienced hemorrhagic complications. PT, aPTT, sodium, t$CO_{2}$, iCa levels showed no difference in pre- and post-CRRT. Total calcium levels were increased. At the recommended postfilter iCa level, j.e., 0.25-0.39 mmol/L, all five patients needed increased amount of citrate infusion, and Ca infusion requirement was decreased. Conclusion : Simplified regional citrate anticoagulation with calcium-containing dialysate is an effective and safe method, and is not associated with increased hemofilter clotting. However, increased postfilter iCa level is recommended.

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GIS spatial D/B formation of geothermal data and Distribution of Heat Flow of Korea (한국의 지열자료 GIS 공간 D/B 구축과 지열류량 분포)

  • Kim, Hyoung-Chan;Lee, Young-Min;Park, Jeong-Min
    • 한국신재생에너지학회:학술대회논문집
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    • 2006.06a
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    • pp.459-460
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    • 2006
  • 현재 남한의 지열류량 측정값으로는 총 363개 지점의 자료가 측정 및 수집되어 있다. 이것은 Mizutani et at. (1970), 장정진 외(1970), 그리고 서정희(1976) 등의 자료, 총 35개의 자료도 추가된 것이다. 1989년 이후부터 측정된 지열류량 자료는 217개 자료이며(임정웅 외, 1989; 임정웅 외, 1996; Lim and Kim, 1997; 염병우 외, 1997), 모두 직접 측정한 것이나, 1989년 이후 보고된 지열류량 자료에 약간의 오류가 있어 이번 연구에서 수정 보완하였다. 또한 과거의 자료 35개 자료는 이미 지열류량 측정치가 논문화 되어 있는 것으로 암석시료는 없다 1989년 이후 2004년까지 자료 217개 2005년도 추가 자료 111개의 지열류량 자료는 암석시료도 있으며, 측정기기가 서로 달라 오차가 있을 수 있어 서로 보정을 해야 할 필요가 있어 시추공 주변 암석을 새로 수집해서 신장비로 다시 측정 보정하였다. 지열류량 D/B 구축은 각 자료의 일련번호, 고유번호 (Sn.), 위경도 좌표 (longitude, lattitude), 암석의 열전도도(thermal conductivity), 지온경사 (thermal gradient), 지열류량 (heat flow)등으로 구성되어 있다. 지열류량 자료 공간 데이터베이스는 점 속성을 가지며 자료형태는 각종 소프트웨어와 호환성이 좋은 shape 파일 형태로 작성하였다. 또만 최근 천부 토양 및 암석 열물성을 이용한 냉난방시스템 즉, Heat Pump System 설계를 위하여 반드시 들어가야 하는 요소인 열확산율, 공극율, 밀도, 비열 등 열물성 특성을 추가하여 GIS 공간 D/B구축하였다. 대륙붕 자료 4개 자료를 제외하고 359개의 지열류량 자료를 이용하여 한반도 남부, 즉 남한의 지열류량 분포도를 작성 분석해 본 결과(그림 1), 우리나라의 지열류량 이상대는 아산만 주변, 보령, 유성, 진안, 울진, 포항, 부산 지역과 포천, 속초, 충주, 수안보 등 지역에서 나타난다 이러한 이상대 주변에는 대개 온천이 발달되어 있었거나 새로 개발되어 있는 곳이다. 온천에 이용하고 있는 시추공의 자료는 배제하였으나 온천이응으로 직접적으로 영향을 받지 않은 시추공의 자료는 사용하였다 이러한 온천 주변 지역이라 하더라도 실제는 온천의 pumping 으로 인한 대류현상으로 주변 일대의 온도를 올려놓았기 때문에 비교적 높은 지열류량 값을 보인다. 한편 한반도 남동부 일대는 이번 추가된 자료에 의해 새로운 지열류량 분포 변화가 나타났다 강원 북부 오색온천지역 부근에서 높은 지열류량 분포를 보이며 또한 우리나라 대단층 중의 하나인 양산단층과 같은 방향으로 발달한 밀양단층, 모량단층, 동래단층 등 주변부로 NNE-SSW 방향의 지열류량 이상대가 발달한다. 이것으로 볼 때 지열류량은 지질구조와 무관하지 않음을 파악할 수 있다. 특히 이러한 단층대 주변은 지열수의 순환이 깊은 심도까지 가능하므로 이러한 대류현상으로 지표부근까지 높은 지온 전달이 되어 나타나는 것으로 판단된다.

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Development of System for Calculating Carbon Storage Amount of Roadside Tree Using Mobile Mapping System (멀티센서 융합 측위 시스템을 이용한 가로수 탄소저장량 산정 시스템 개발)

  • Kim, Jeong-Seob;Yang, Keum-Chul
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.4
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    • pp.536-543
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    • 2017
  • This study developed a new methodology to evaluate the carbon storage using a Mobile Mapping System according to the life cycle of street trees. The system for calculating the carbon storage of a roadside tree using the MMS developed in this study consisted of a database, memory, processor, user interface, and communication module. The carbon storage was calculated for 261 trees in the Cheonan-Asan New Town (distance: 2.1 km, area: $283,698m^2$). The average biomass and carbon storage of Metasequoia glyptostroboides were highest at 34.5 kg and 17.3 kg C and Chionanthus retusa were lowest at 19.5 kg and 9.8 kg C, respectively. The total biomass and total carbon storage of Ginkgo biloba were highest at 5028.8 kg and 17.3 kg C and Chionanthus retusa were lowest at 780.7 kg and 390.3 kg C, respectively. Based on the roadside tree database, the amount of carbon storage in a given area was converted to Google format and visualized in 3D by GIS analysis.