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Entrepreneurship and Sustainability Issues is a peer-reviewed journal which publishes original research papers and case studies
Rita Remeikienė; Ligita Gasparėnienė; Viktoras Chadyšas; Evaldas Raistenskis. Links between corruption and quality of life in European Union. Entrepreneurship and Sustainability Issues 2020, 7, 2664 -2675.
AMA StyleRita Remeikienė, Ligita Gasparėnienė, Viktoras Chadyšas, Evaldas Raistenskis. Links between corruption and quality of life in European Union. Entrepreneurship and Sustainability Issues. 2020; 7 (4):2664-2675.
Chicago/Turabian StyleRita Remeikienė; Ligita Gasparėnienė; Viktoras Chadyšas; Evaldas Raistenskis. 2020. "Links between corruption and quality of life in European Union." Entrepreneurship and Sustainability Issues 7, no. 4: 2664-2675.
The trans-boundary area between the Europe Union and other countries is highly susceptible to changes in water quality and variations in the potential pollution load that could influence its eco-systems significantly. The Neris (Viliya) River is one of the biggest surface water bodies in Lithuania and Belarus with an ecologically important area protected by international legislation. The study was aimed at evaluating the impacts of integrated pollution on water quality of the Neris River taking into account different storm-water flows and ecological scenarios. For this purpose, qualitative and quantitative statistical evaluation was set up and calculation was done; different integrated pollution loads of the catchment area were estimated. The evaluation considered a decrease in river discharge due to changes in the regional storm-water flow and technological development that should lead to the growing covered surface and a reduction in the untreated storm-water flows. The obtained results indicated that, in the case of storm-water treatment, the total nitrate and phosphate concentrations will decrease, while in the cases of changes in combined suspended solid, the concentration of nutrients will decrease. Thus, a trans-boundary storm-water treatment plant of the Viliya River is required as it should eliminate pollution accumulation and restore its acceptable environmental status. A coordinated international project for the entire catchment of the Neris (Viliya) River based on the specifications and requirements of the EU Water Framework Directive (EU 2000) should be developed and implemented. Subsequently, ecological river-use policies should be established at the international level, which should offer considerable perspectives for the sustainable development of the area.
Marina Valentukevičienė; Lina Bagdžiūnaitė-Litvinaitienė; Viktoras Chadyšas; Andrius Litvinaitis. Evaluating the Impacts of Integrated Pollution on Water Quality of the Trans-Boundary Neris (Viliya) River. Sustainability 2018, 10, 4239 .
AMA StyleMarina Valentukevičienė, Lina Bagdžiūnaitė-Litvinaitienė, Viktoras Chadyšas, Andrius Litvinaitis. Evaluating the Impacts of Integrated Pollution on Water Quality of the Trans-Boundary Neris (Viliya) River. Sustainability. 2018; 10 (11):4239.
Chicago/Turabian StyleMarina Valentukevičienė; Lina Bagdžiūnaitė-Litvinaitienė; Viktoras Chadyšas; Andrius Litvinaitis. 2018. "Evaluating the Impacts of Integrated Pollution on Water Quality of the Trans-Boundary Neris (Viliya) River." Sustainability 10, no. 11: 4239.
The article elaborated the main differences between traditional studies and distance learning. An overview of teaching mathematics of each individual studies in VGTU and comparative analysis are performed.
Svetlana Danilenko; Viktoras Chadyšas; Aurelija Kasparavičiūtė. Comparative analysis of mathematics teaching in different studies. Lietuvos matematikos rinkinys 2016, 57, 83–88 -83–88.
AMA StyleSvetlana Danilenko, Viktoras Chadyšas, Aurelija Kasparavičiūtė. Comparative analysis of mathematics teaching in different studies. Lietuvos matematikos rinkinys. 2016; 57 ():83–88-83–88.
Chicago/Turabian StyleSvetlana Danilenko; Viktoras Chadyšas; Aurelija Kasparavičiūtė. 2016. "Comparative analysis of mathematics teaching in different studies." Lietuvos matematikos rinkinys 57, no. : 83–88-83–88.
The combined ratio-type estimators of the finite population total and their variances in the case of sample rotation for two-phase and four-phase sampling schemes are constructed in the paper. Combined estimators of the finite population total without and with the use of auxiliary information known from the previous survey are built. Two types of sampling design are used for sample selection in each of the phases: simple random sampling without replacement and successive sampling without replacement with probabilities proportional to size. A simulation study, based on the real data, is performed, and the accuracy of the estimators proposed is compared.
Viktoras Chadyšas; Danutė Krapavickaitė. Estimation of the current population total for a four-phase sampling design. Nonlinear Analysis: Modelling and Control 2016, 21, 241 -260.
AMA StyleViktoras Chadyšas, Danutė Krapavickaitė. Estimation of the current population total for a four-phase sampling design. Nonlinear Analysis: Modelling and Control. 2016; 21 (2):241-260.
Chicago/Turabian StyleViktoras Chadyšas; Danutė Krapavickaitė. 2016. "Estimation of the current population total for a four-phase sampling design." Nonlinear Analysis: Modelling and Control 21, no. 2: 241-260.
The article elaborated the concept of distance learning and consider distance learning techniques, which are currently used in mathematics education, through distance learning in Vilnius Gediminas Technical University (VGTU).
Aurelija Kasparavičiūtė; Viktoras Chadyšas. Mathematics education in distance studies. Lietuvos matematikos rinkinys 2015, 56, 57–62 -57–62.
AMA StyleAurelija Kasparavičiūtė, Viktoras Chadyšas. Mathematics education in distance studies. Lietuvos matematikos rinkinys. 2015; 56 ():57–62-57–62.
Chicago/Turabian StyleAurelija Kasparavičiūtė; Viktoras Chadyšas. 2015. "Mathematics education in distance studies." Lietuvos matematikos rinkinys 56, no. : 57–62-57–62.
The paper describes various methods that can be applied to the ranking of sports teams. Using the real data of theNational Basketball Association (NBA) from the first half of the 2014–2015 season (from 2014-10-28 to 2015-02-12), teams areranked using different ranking methods. All methods are compared with each other.
Eimantas Palionis; Viktoras Chadyšas. Methods for Ranking Sports Teams. Lietuvos statistikos darbai 2015, 54, 84 -91.
AMA StyleEimantas Palionis, Viktoras Chadyšas. Methods for Ranking Sports Teams. Lietuvos statistikos darbai. 2015; 54 (1):84-91.
Chicago/Turabian StyleEimantas Palionis; Viktoras Chadyšas. 2015. "Methods for Ranking Sports Teams." Lietuvos statistikos darbai 54, no. 1: 84-91.