1,138 research outputs found

    SIMULATIONS OF SPACE RADIATION INTERACTIONS WITH MATERIALS, WITH APPLICATION TO DOSE ESTIMATES FOR LUNAR SHELTER AND ABOARD THE INTERNATIONAL SPACE STATION

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    This research performed simulations using the state-of-art three dimensional computer codes to investigate the interactions of space radiation with materials and quantify the biological dose onboard the International Space Station (ISS) and in a lunar shelter for future manned missions. High-energy space radiation of Trapped Protons, Solar Particle Events, and GCRs particles interactions are simulated using MCNPX and PHITS probabilistic codes. The energy loss and energy deposition within the shielding materials and in a phantom are calculated. The contributions of secondary particles produced by spallation reactions are identified. Recent experimental measurements of absorbed dose in a phantom aboard the International Space Station (ISS) was simulated, and used to determine the most appropriate simulation methodology

    Critical Information for Vietnamese Economy Aiming at a Strategic Breakthrough as Approaching the Industry 4.0

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    Chances, and challenges always are created in the fourth industrial revolution that has never faced in the past. Changing and renewing are necessary unless enterprises will come out of “playground” of the fourth industrial revolution. Currently, the navigational field, which has not been outside the “playground”, has suffered from numerous challenges. Although the possible advantages of marine industry only include the seaport system and government support, the challenges and barriers are the majority. Labor, database management, digital technologies, infrastructures, investment, and customer’s attractions are the existent trials of the maritime field. Improvement and renewing the educational program are compulsory. Furthermore, managing the database effectively is not easy. In Vietnam, the lack of synchronous infrastructures is also the enormous challenges of all industries in general and navigational field in particular. Moreover, the investment and customer attractions play the primary role to exist in the revolution. Some of the aspects of the maritime major in the fourth industrial revolution will be mentioned in the article. Also, supporting from Vietnam government as well as current challenges are thoroughly presented and analyzed to find the solutions for approaching the Industry 4.0. Among emerging challenges, the investment attraction, infrastructures, labor, database management, modern digital technology, and customer attraction may be considered as critical information for Vietnamese economy. Importantly, the challenges are analyzed to reveal that if these challenges can be transformed into the motivations, gaining achievements in 4.0 industrial revolution is not difficulty

    Harmony and Conflict

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    A STUDY ON TRANSPORT PLANNING SOLUTIONS TO MEET THE DEVELOPMENT OF LOGISTICS SERVICES, A CASE IN CAI MEP-THI VAI PORT

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    costs for businesses in the region in order to form reasonable transportation routes, within and outside the guaranteed area. Improve the output of goods through and reduce social costs, in accordance with the planning of the transportation system, improve socio-economic efficiency in goods circulation. Methodology: This study uses statistical methods - data analysis, survey analysis, trend approach to forecast such as goods demand through ports, assess the nature of the problem and find specific solutions to devise optimal planning solutions. Main Findings: Transport infrastructure directly affects logistics performance, particularly on time, cost, reliability, and safety of this service, thereby affecting the growth rate of the economy in general and the business efficiency of enterprises in particular. Therefore, in order to meet the fast development of Cai Mep-Thi Vai logistics and port system, the transport infrastructure must be concerned, planned, and deployed in a synchronized and proper manner. Applications of this study: The Cai Mep-Thi Vai port area being invested and built and developed will be of utmost importance in Vietnam, with access to international maritime routes, connecting with existing wharves to form a continuous port system serving the dynamic economic development centers of the southern and international regions. Novelty/Originality of this study: The problems of port logistics and transport infrastructure to serve logistics. Provide some general theoretical issues about transportation for port logistics services. Also basing on foreign experiment and regional lessons to evaluate the existence of transport infrastructure for logistics services in Cai Mep-Thi Vai port area; point out the shortcomings and inadequacies of transport infrastructure for logistics

    Enhancing Operational Efficiency Of Information Technology Systems: The Experience Of Saigon Union Company, Vietnam

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    Nowadays Information Technology (It) Has Helped The Industries To Deal With The Challenges When New Economy Poses. Moreover, Institutions Rely On It Gathering, Processing, Analysing, And Providing Information And Services In Order To Meet The Customers’ Need. The Analysis And Processing Of Information In Organizations In General And Enterprises In Particular Need To Be Accurate And Timely To Support Decision-Making As Well As Management And Planning Of The Management Board. The Operation And Use Of Information Systems (Is) To Replace The Traditional Information Management Methods In Many Businesses Is No Longer A New Thing. Digitalization Of Products And Services Is A Fast-Moving, Global Megatrend That Is Fundamentally Changing Existing Value Chains Across Industries And Public Sectors. Modern Wireless Internet-Based Technologies With Real-Time Data Analysis Are The Common Tools Of Digital Applications To Provide Organizations With Great Business Improvements. The Topic “Enhancing Operational Efficiency Of Information Technology Systems: The Experience Of Saigon Union Company, Vietnam” Is Conducted To Evaluate The Factors Affecting The Improvement Of The Operational Efficiency Of It Systems For Saigon Union, Vietnam. The Target Of Is/It System Is Always Closely Linked With The Goals Of The Business. It Can Be Said That The Is/It System Is An Effective Tool Create Brand Value And Optimal Competitive Position In The Market Not Only In Vietnam But Also In International Markets. Especially During The Covid-19 Epidemic, Enhancing Operational Efficiency Of It System Is One Of The Effective Solutions To Enhance The Competitiveness Of Saigon Union

    An investigation of discovering business processes from operational databases

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    Process discovery techniques aim to discover process models from event-logs. An event-log records process activities carried out on related data items and the timestamp where the event occurred. While the event-log is explicitly recorded in the process-awareness information systems such as modern ERP and CRM systems, other in-house information systems may not record event-log, but an operational database. This raises the need to develop process discovery solutions from operational databases. Meanwhile, process models can be represented from various perspectives, e.g. functional, behavioural, organisational, informational and business context perspectives. However, none of the existing techniques supports to discover process models from different perspectives using operational databases. This paper aims to deal with these gaps by proposing process expressive artefacts based on process perspectives adopted in the literature, as well as discussing how these artefacts can be extracted from data components of a typical operational database

    Smart City, Citizen Engagement, and Information System Research

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    The paper highlights the importance of involvement of citizens in all the steps of smart city initiatives.Therefore, authors try to identify key factors and enablers for effective engagement and involvement of citizens and residents in any smart city project
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