http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
CFD ANALYSIS OF HEAVY LIQUID METAL FLOW IN THE CORE OF THE HELIOS LOOP
Batta, A.,Cho, Jae-Hyun,Class, A.G.,Hwang, Il-Soon Korean Nuclear Society 2010 Nuclear Engineering and Technology Vol.42 No.6
Lead-alloys are very attractive nuclear coolants due to their thermo-hydraulic, chemical, and neutronic properties. By utilizing the HELIOS (Heavy Eutectic liquid metal Loop for Integral test of Operability and Safety of PEACER$^2$) facility, a thermal hydraulic benchmarking study has been conducted for the prediction of pressure loss in lead-alloy cooled advanced nuclear energy systems (LACANES). The loop has several complex components that cannot be readily characterized with available pressure loss correlations. Among these components is the core, composed of a vessel, a barrel, heaters separated by complex spacers, and the plenum. Due to the complex shape of the core, its pressure loss is comparable to that of the rest of the loop. Detailed CFD simulations employing different CFD codes are used to determine the pressure loss, and it is found that the spacers contribute to nearly 90 percent of the total pressure loss. In the system codes, spacers are usually accounted for; however, due to the lack of correlations for the exact spacer geometry, the accuracy of models relies strongly on assumptions used for modeling spacers. CFD can be used to determine an appropriate correlation. However, application of CFD also requires careful choice of turbulence models and numerical meshes, which are selected based on extensive experience with liquid metal flow simulations for the KALLA lab. In this paper consistent results of CFX and Star-CD are obtained and compared to measured data. Measured data of the pressure loss of the core are obtained with a differential pressure transducer located between the core inlet and outlet at a flow rate of 13.57kg/s.
CFD ANALYSIS OF HEAVY LIQUID METAL FLOW IN THE CORE OF THE HELIOS LOOP
A. BATTA,JAE HYUN CHO,A.G. CLASS,IL SOON HWANG 한국원자력학회 2010 Nuclear Engineering and Technology Vol.42 No.6
Lead-alloys are very attractive nuclear coolants due to their thermo-hydraulic, chemical, and neutronic properties. Byutilizing the HELIOS (Heavy Eutectic liquid metal Loop for Integral test of Operability and Safety of PEACER2) facility, athermal hydraulic benchmarking study has been conducted for the prediction of pressure loss in lead-alloy cooled advancednuclear energy systems (LACANES). The loop has several complex components that cannot be readily characterized withavailable pressure loss correlations. Among these components is the core, composed of a vessel, a barrel, heaters separatedby complex spacers, and the plenum. Due to the complex shape of the core, its pressure loss is comparable to that of the restof the loop. Detailed CFD simulations employing different CFD codes are used to determine the pressure loss, and it is foundthat the spacers contribute to nearly 90 percent of the total pressure loss. In the system codes, spacers are usually accountedfor; however, due to the lack of correlations for the exact spacer geometry, the accuracy of models relies strongly on assumptionsused for modeling spacers. CFD can be used to determine an appropriate correlation. However, application of CFD alsorequires careful choice of turbulence models and numerical meshes, which are selected based on extensive experience withliquid metal flow simulations for the KALLA lab. In this paper consistent results of CFX and Star-CD are obtained andcompared to measured data. Measured data of the pressure loss of the core are obtained with a differential pressure transducerlocated between the core inlet and outlet at a flow rate of 13.57kg/s
SMEs and Sustainable Tourism -The Case of an Indian Himalayan Destination-
( Ravinder N Batta ) 한국문화관광학회 2013 문화관광연구 Vol.15 No.1
This paper examines the impacts of unplanned growth of tourism SMEs on civic infrastructure and the environment at Manali-a major tourist destination of Himachal Pradesh. Using indicator`s framework, impacts of tourism on the economic, social, environmental aspects are studied and it is seen that SMEs working in isolation are damaging the environment at the destination. While the local community is paying the cost of tourism development in the form of degradation of environmental resources, commercialization of landscape and congestion; majority of the economic benefits are flowing to the expatriates making tourism at the destination unsustainable. For achieving sustainable tourism development at the destination through public-private partnership, a Community Benefit Tourism Initiative (CBTI) model is proposed.
Monitoring Mental Healthcare Services Using Business Analytics
Samy Housbane,Adil Khoubila,Khaoula Ajbal,Zineb Serhier,Mohamed Agoub,Omar Battas,Mohamed Bennani Othmani 대한의료정보학회 2020 Healthcare Informatics Research Vol.26 No.2
Objectives: Monitoring healthcare activities is the first step for health stakeholders and health professionals to improve the quality and performance of healthcare services. However, monitoring remains a challenge for healthcare facilities, especially in developing countries. Fortunately, advances in business analytics address this need. This paper aims to describe the experience of a lowincome healthcare facility in a developing country in using business analytics descriptive techniques and to discuss business analytics implementation challenges and opportunities in such an environment. Methods: Business analytics descriptive techniques were applied on 3 years’ electronic medical records of outpatient consultation of the University Psychiatric Centre (CPU) of Casablanca. Statistical analysis was conducted to compare results over years. Results: Over the 3 monitored years, the monthly number of computerized physician order entries increased significantly (p < 0.001). Physicians improved their personal recording over years. Schizophrenia as well as depressive and bipolar disorders were noted at the top of outpatient mental disorders. Antipsychotics are the most prescribed drugs, and a significant annual decrease in outpatient care wait time was noted (p < 0.001). Conclusions: Business analytics allowed CPU to monitor mental healthcare outpatient activity and to adopt its business processes according to outcomes. However, challenges mainly in the organizational dimension of the decision-making process and the definition of strategic key metrics, data structuration, and the quality of data entry had to be considered for the optimal use of business analytics.
Real-Time Monitoring System to Manage Mental Healthcare Emergency Unit
Samy Housbane,Adil Khoubila,Khaoula Ajbal,Mohamed Agoub,Omar Battas,Mohamed Bennani Othmani 대한의료정보학회 2020 Healthcare Informatics Research Vol.26 No.4
Objectives: Real-time relevant information helps guide the healthcare decision-making process in daily clinical practice aswell as the management and optimization of healthcare processes. However, proprietary business intelligence suite solutionssupporting the production of decision-making information requires investment that is out of reach of small and mediumsizedhealthcare facilities or those with limited resources, particularly in developing countries. This paper describes our experiencein designing and implementing a real-time healthcare monitoring system solution to manage healthcare emergencyunits. Methods: Through the use of free Business Intelligence tools and Python data science language we designed a realtimemonitoring system, which was implemented to explore the Electronic Medical Records system of a university mentalhealth emergency unit and render an electronic dashboard to support health professional daily practice. Results: Three maindashboards were created to monitor patient waiting time, to access the clinical notes summary for the next waiting patient,and to obtain insights into activity during the last 24 hours. Conclusions: The designed system could serve as a monitoringsupport model using free and user-friendly data science tools, which are good alternatives to proprietary business intelligencesolutions and drastically reduce cost. Still, the key to success in decision-making systems is based on investment in humanresources, business intelligence skills training, the organizational aspect of the decision-making process, and data productionquality insurance.
Aguilar, M.,Ali Cavasonza, L.,Ambrosi, G.,Arruda, L.,Attig, N.,Aupetit, S.,Azzarello, P.,Bachlechner, A.,Barao, F.,Barrau, A.,Barrin, L.,Bartoloni, A.,Basara, L.,Baş,eğ,mez-du Pree, S.,Batta American Physical Society 2018 Physical Review Letters Vol.120 No.2
<P>We report on the observation of new properties of secondary cosmic rays Li, Be, and B measured in the rigidity (momentum per unit charge) range 1.9 GV to 3.3 TV with a total of 5.4 x 10(6) nuclei collected by AMS during the first five years of operation aboard the International Space Station. The Li and B fluxes have an identical rigidity dependence above 7 GV and all three fluxes have an identical rigidity dependence above 30 GV with the Li/Be flux ratio of 2.0 +/- 0.1. The three fluxes deviate from a single power law above 200 GV in an identical way. This behavior of secondary cosmic rays has also been observed in the AMS measurement of primary cosmic rays He, C, and O but the rigidity dependences of primary cosmic rays and of secondary cosmic rays are distinctly different. In particular, above 200 GV, the secondary cosmic rays harden more than the primary cosmic rays.</P>
Aguilar, M.,Ali Cavasonza, L.,Ambrosi, G.,Arruda, L.,Attig, N.,Aupetit, S.,Azzarello, P.,Bachlechner, A.,Barao, F.,Barrau, A.,Barrin, L.,Bartoloni, A.,Basara, L.,Baş,eğ,mez-du Pree, S.,Batta American Physical Society 2016 Physical review letters Vol.117 No.23
<P>Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law R. with index. Delta = -0.333 +/- 0.014(fit) +/- 0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts. Delta = -1/3 asymptotically.</P>