• Title/Summary/Keyword: 시점확인

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Removal of Mixed Cd, Cr, Cu, Ni and Zn by Hibiscus canabinas (Hibiscus canabinas를 이용한 Cd, Cr, Cu, Ni 및 Zn의 제거)

  • 최문술;임철호
    • Korean Journal of Environmental Biology
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    • v.22 no.1
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    • pp.120-126
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    • 2004
  • Kenaf plants were hydroponically grown in reactor containing toxic metals as Cd, Cu, Cr, Ni and Zn to examine the ability to take up heavy metal. The plants were fertilized using a nutrient solution, which was appropriately adjusted to optimum pH, DO and conductivity. For n hydraulic retention time of 8 days, Cr, Cd, Cu, Ni and Zn were removed up to 90.5, 80.5, 66.1%, 71.1% and 79.4%, and reduced from 2.34 to 0.54 mg $L^{-1}$, 3.37 to 1.07 mg $L^{-1}$, 4.92 to 3.19 mg $L^{-1}$, 6.31 to 4.41 mg $L^{-1}$ and 6.27 to 2.09 mg $L^{-1}$. Especially, accumulation rate of Cr, Cd, Cu, Ni and Zn in the plant were measured up to 347.32, 275.39, 157.52, 50.48 and 211.01 mg DW kg $L^{-1}d^{-1}$, respectively. We considered that Kenaf plants removed Cr, Cd and Zn more effectively than other toxic metals applied.

Long-Term Survival of Patients with Lung Cancer Treated by Traditional Korean Medicine Combined with Western Treatment: Report of Two Cases (양한방 복합투여로 장기간 생존을 보인 폐암 환자 2례)

  • Kang, Ji-young;Kim, Jun-young;Son, Chang-gue;Cho, Jung-hyo
    • The Journal of Internal Korean Medicine
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    • v.36 no.1
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    • pp.58-68
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    • 2015
  • Objectives : To evaluate the long-term survival effects of traditional Korean medicine (TKM) on refractory metastatic lung cancer and small cell lung cancer (SCLC), which have historically poor survival rates. Methods : A retrospective study was conducted using the medical records of two patients in Daejeon University hospital. The first patient, with SCLC, was treated from January 2000 to December 2009 and the other, with metastatic pulmonary cancer from primary hepatocellular carcinoma (HCC), was treated from September 2004 to February 2014. The patients were treated with herbal medicines at one-month intervals. During hospitalization, acupuncture and indirect moxibustion were performed concurrent with the administration of Western therapy. Treatment efficacy was assessed monthly using chest radiography, chest computed tomography, and laboratory examination data, and by measuring patient performance status. Results : Both patients exhibited a stable disease course for more than 9 years after the initial diagnosis of intractable lung cancer, suggesting that their disease status was controlled by TKM. Conclusions : We suggest that a combination of TKM with conventional Western therapy for refractory lung cancer patients is effective in controlling various symptoms related to lung cancer and improving quality of life, and may potentially prolong overall survival.

Safety Improvement of Installation of "Hi-pass" System at Expressway Toll Gate (교통상충기법을 이용한 고속도로 하이패스차로 안전성 개선에 관한 연구 (서울외곽순환고속도로 본선영업소를 중심으로))

  • Yu, Bong-Seok;Lee, Su-Beom;Park, Wan-Yong;Park, Jun-Tae
    • Journal of Korean Society of Transportation
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    • v.28 no.4
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    • pp.7-18
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    • 2010
  • This study analyzed the relative vehicle speed and vehicle deceleration time caused by traffic conflicts using vehicle speed data at expressway toll gates and traffic conflict occurrence data. According to the analysis, the greater the relative vehicle speed is at the toll gate, the more sudden vehicle deceleration occurs due to traffic conflicts. In particular, a comparison study of cases in similar operating conditions presents a finding that usage of lanes influences traffic conflict occurrences as well as relative vehicle speed. With this finding, the study further conducted a quantitative analysis of the accident rates in relation to the relative vehicle speed between vehicles using a "Hi-Pass" lane and a regular lane at the toll gate. It indicates that when the relative vehicle speed is greater, the accident rate is higher due to sudden vehicle deceleration and shorter deceleration time. Furthermore, when the expressway entrance/exit point is closely located to a toll gate and the relative vehicle speed is great, a analysis at a traffic conflict shows a low value.

A Study on Core Factors and Application of Asymmetric VR Content (Asymmetric VR 콘텐츠 제작의 핵심 요인과 활용에 관한 연구)

  • Kim, Jinmo
    • Journal of the Korea Computer Graphics Society
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    • v.23 no.5
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    • pp.39-49
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    • 2017
  • In this study, we propose the core factors and application of asymmetric virtual reality(VR) content in which head-mounted display(HMD) user and Non-HMD users can work together in a co-located space that can lead to various experiences and high presence. The core of the proposed asymmetric VR content is that all users are immersed in VR and participate in new experiences by reflecting widely a range of users' participation and environments, regardless of whether or not users wear the HMD. For this purpose, this study defines the role relationships between HMD user and Non-HMD users, the viewpoints provided to users, and the speech communication structure available among users. Based on this, we verified the core factors through the process of producing assistive asymmetric VR content and cooperative asymmetric VR content directly. Finally, we conducted a survey to examine the users' presence and their experience of the proposed asymmetric VR content and to analyze the application method. As a result, it was confirmed that if the purpose of asymmetric VR content and core factors between the two types of users are clearly distinguished and defined, the independent experience presented by the VR content together with perceived presence can provide a satisfactory experience to all users.

An Effectiveness Analysis of pedestrian crosswalk signal on roundabout (회전교차로의 보행신호 설치효과 분석)

  • Moon, Joo-Baek;Lee, In-Kyu;Kim, Young-Chan
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.12 no.2
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    • pp.63-75
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    • 2013
  • Roundabouts have been operated in Europe, America and Australia since the 1970s, and many relevant researches continually was carried out. Though many studies regarding roundabout have been recently conducted in korea, most of them have focused on its operational safety and efficiency. Moreover, roundabout design guideline did not define a clear criteria related to pedestrian in roundabout, but seldom investigate the influences of pedestrian on crosswalk. In this study, we seek ways to operate the pedestrian crosswalk signal on roundabout maximizing their operational effects in exceptional case such as rush hour or intersection near the special facilities. We proved that roundabout signal operation is effective under certain circumstances in according to the number of pedestrian, and suggested the optimal signal timing plan for signalized roundabouts. For pursuing the above, we conducted the simulation test using the VISSIM model. The results show that the operational effectiveness of signalized roundabout was evaluated to be better than non-signalized roundabout in specific pedestrian volume condition. In addition, those results are confirmed using simulation analysis conducted on the real roundabout.

The Effects of Interactive Instrument Playing Program on Social Interaction of Adults With Autism Spectrum Disorder (상호적 악기 연주 프로그램이 자폐범주성장애 성인의 사회적 상호작용 기능 향상에 미치는 효과)

  • Cho, Soo Jin
    • Journal of Music and Human Behavior
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    • v.13 no.1
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    • pp.89-110
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    • 2016
  • This study examined the effect of an interactive instrument playing program on the social interaction of adults with autism spectrum disorder (ASD). A single subject design with multiple baselines across participants was applied, and three adults with severe ASD in their late 20s living at a group home participated in this study. Participants received a total of 25 group sessions. During the intervention, participants engaged in structured instrument playing in which initiation and response to socially interactive behaviors were musically cued, and target behaviors were reinforced in the musical environment. At pre- and posttest, the frequency of initiation of and responding to social interaction behaviors were recorded and analyzed. The results of this study showed that the frequency of both initiation of, and response to, social interaction increased for all participants during the intervention phase, compared to the baseline phase. This result demonstrates that interactive instrument playing increased social behaviors of adults with ASD. It also shows that musically delivered social information can facilitate adults with ASD understanding the intention of social partners in social contexts and motivate this population to engage in social interaction.

Seasonal Prediction of Tropical Cyclone Activity in Summer and Autumn over the Western North Pacific and Its Application to Influencing Tropical Cyclones to the Korean Peninsula (북서태평양 태풍의 여름과 가을철 예측시스템 개발과 한반도 영향 태풍 예측에 활용)

  • Choi, Woosuk;Ho, Chang-Hoi;Kang, KiRyong;Yun, Won-Tae
    • Atmosphere
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    • v.24 no.4
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    • pp.565-571
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    • 2014
  • A long-range prediction system of tropical cyclone (TC) activity over the western North Pacific (WNP) has been operated in the National Typhoon Center of the Korea Meteorological Administration since 2012. The model forecasts the spatial distribution of TC tracks averaged over the period June~October. In this study, we separately developed TC prediction models for summer (June~August) and autumn (September~November) period based on the current operating system. To perform the three-month WNP TC activity prediction procedure readily, we modified the shell script calling in environmental variables automatically. The user can apply the model by changing these environmental variables of namelist parameter in consideration of their objective. The validations for the two seasons demonstrate the great performance of predictions showing high pattern correlations between hindcast and observed TC activity. In addition, we developed a post-processing script for deducing TC activity in the Korea emergency zone from final forecasting map and its skill is discussed.

A Case Study on Credit Analysis System in P2P: 8Percent, Lendit, Honest Fund (P2P 플랫폼에서의 대출자 신용분석 사례연구: 8퍼센트, 렌딧, 어니스트 펀드)

  • Choi, Su Man;Jun, Dong Hwa;Oh, Kyong Joo
    • Knowledge Management Research
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    • v.21 no.3
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    • pp.229-247
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    • 2020
  • In the remarkable growth of P2P financial platform in the field of knowledge management, only companies with big data and machine learning technologies are surviving in fierce competition. The ability to analyze borrowers' credit is most important, and platform companies are also recognizing this capability as the most important business asset, so they are building a credit evaluation system based on artificial intelligence. Nonetheless, online P2P platform providers that offer related services only act as intermediaries to apply for investors and borrowers, and all the risks associated with the investments are attributable to investors. For investors, the only way to verify the safety of investment products depends on the reputation of P2P companies from newspaper and online website. Time series information such as delinquency rate is not enough to evaluate the early stage of Korean P2P makers' credit analysis capability. This study examines the credit analysis procedure of P2P loan platform using artificial intelligence through the case analysis method for well known the top three companies that are focusing on the credit lending market and the kinds of information data to use. Through this, we will improve the understanding of credit analysis techniques through artificial intelligence, and try to examine limitations of credit analysis methods through artificial intelligence.

Simulation on Concentration of CH4 Using Hollow Fiber Membrane Permeator with Countercurrent Flow (향류 흐름 중공사 분리막의 메탄 농축 수치해석)

  • Seo, Yeonhee;Lee, Seungmin;Park, Sungeun;Jung, Woojin;Kim, Jeonghoon;Lee, Yongtaek
    • Membrane Journal
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    • v.24 no.3
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    • pp.223-230
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    • 2014
  • A numerical analysis was performed for concentration of methane from the biogas using a polysulfone hollow fiber membrane permeator. Governing equations were derived for the countercurrent flow and numerically solved by using the Compaq Visual Fortran 6.6 software. When the methane mole fraction of feed was 0.5, the mole fraction of retentate increased from 0.5 to 0.8; the normalized retentate flow rate to the feed flow rate decreased from 1.0 to 0.57 at the given typical operating condition as the feed gas flowed from the inlet to the outlet of the membrane. As the methane mole fraction of feed was changed to 0.9, the methane mole fraction of retentate became 0.93 and the normalized retentate flow rate was changed to 0.91. When the pressure ratio of the permeate to the feed was varied from 0.33 to 0.17, there was a little difference in the methane mole fraction of retentate for the low stage cut of 0.1, whereas there was an significant increment for the high stage cut of 0.3. The retentate methane mole fraction remained relatively high despite the change of a stage cut as the area of the membrane increased from $1.14m^2$ to $2.57m^2$.

Effect of Lower Limb Muscle Activity on Balancing through Sprinter Patterns of PNF (PNF의 Sprinter Pattern을 통한 하지의 근 활성도가 균형능력에 미치는 영향)

  • Jeong, Woo-Sik;Jeong, Jae-Young;Kim, Chan-Kyu;Jung, Dae-In;Kim, Kyung-Yoon
    • The Journal of the Korea Contents Association
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    • v.11 no.3
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    • pp.281-292
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    • 2011
  • In this study, for examining an effect of lower limbs' muscle activity on balance capability when applying sprinter pattern among the PNF, the experiment was conducted as followed. Under the object of 24 people diagnosed by hemiplegia, they were divided into control group and experimental group and the experiment was conducted on the experimental group, three times per a week for six weeks. Experimental group received Sprinter pattern of combined PNF upper extremity and lower extremity pattern. For the lower limbs' muscle activity, effective values of Vastus medialis laterails, medial lateral hamstrings, lateral gastrocnemius' action potential were analyzed. The balance ability tests was conducted with FICSIT-4, FSST and MTD-Balance system. For the significance test of control group and experimental group for measuring time by exercise application method, two-way repeated measure ANOVA was conducted and for the significance test among the groups by each measuring time, independent t-test was conducted. Also, for examining the correlation among the measuring item, pearson correlation was used for the analysis. As the result, the application of sprinter pattern increased muscle activity of lower limbs in paretic side and improve static and dynamic balance ability effectively. Therefore, it will be necessary to develop new intervention by combining active application of the therapeutic intervention program for lower limbs' effective muscle mobilizing in paretic side with various exercising patterns.