Pub Date : 2023-01-01DOI: 10.12988/ams.2023.917389
Anamika Sharma, Geetanjali Sharma
Cap and trade can be effective in reducing emissions and promoting sustainability by providing a clear measurable target and a flexible, market-based mechanism for achieving that target. In this paper, demand is taken as selling price dependent. The effect of inflation is also taken into consideration. We developed a sustainable inventory model with a cap-and-trade policy. The model aims to find the optimal inventory level for a retailer that balances economic sustainability and environmental responsibilities. By considering the cost of carbon emissions and the financial impact of inventory levels on the company, the model helps managers make informed decisions about inventory control that support both economic and environmental goals. The numerical illustration is carried out by using the software Mathematica 12.0. Sensitivity analysis is carried out to see the behavior of different parameters on an optimal solution.
{"title":"Sustainable inventory model with price dependent demand under cap-and-trade policy","authors":"Anamika Sharma, Geetanjali Sharma","doi":"10.12988/ams.2023.917389","DOIUrl":"https://doi.org/10.12988/ams.2023.917389","url":null,"abstract":"Cap and trade can be effective in reducing emissions and promoting sustainability by providing a clear measurable target and a flexible, market-based mechanism for achieving that target. In this paper, demand is taken as selling price dependent. The effect of inflation is also taken into consideration. We developed a sustainable inventory model with a cap-and-trade policy. The model aims to find the optimal inventory level for a retailer that balances economic sustainability and environmental responsibilities. By considering the cost of carbon emissions and the financial impact of inventory levels on the company, the model helps managers make informed decisions about inventory control that support both economic and environmental goals. The numerical illustration is carried out by using the software Mathematica 12.0. Sensitivity analysis is carried out to see the behavior of different parameters on an optimal solution.","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"10 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83576965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.12988/ams.2023.917335
Pamphile Mpabansi
Burundi started to receive refugees during the colonial period in 1959. These were Rwandan refugees who were fleeing massacres in their country. Since then, the reception of refugees has never stopped and Burundi currently has 84,961 refugees, most of whom come from the Democratic Republic of Congo. This is a very large number of people, considering the size of Burundi and its population. These refugees come from the east of the Democratic Republic of Congo and are fleeing the insecurity caused by the armed groups that are multiplying there. This work is the result of field visits to the five refugee camps in Burundi, which resulted in a total of 90 interviews. The sample included both men and women, taking into account their social status, vulnerability, and seniority (former and new refugees). To collect the data, we used a voice recorder and a notebook at our disposal in which we put some details that needed clarification. We used Word, Excel, and SPSS to process the data. The analysis of these interviews shows the difficulties of the life of these refugees. The objective of this study is to analyze refugees' perception of durable solutions to their problem of exile. As these refugees do not expect to return home, most of them turn to resettlement. Only 37.8% have been selected for resettlement. Naturalization and repatriation, two other durable solutions, are not part of the choice of these refugees who are looking toward resettlement.
{"title":"The perception of Congolese refugees in Burundi of the recommended durable solutions for them","authors":"Pamphile Mpabansi","doi":"10.12988/ams.2023.917335","DOIUrl":"https://doi.org/10.12988/ams.2023.917335","url":null,"abstract":"Burundi started to receive refugees during the colonial period in 1959. These were Rwandan refugees who were fleeing massacres in their country. Since then, the reception of refugees has never stopped and Burundi currently has 84,961 refugees, most of whom come from the Democratic Republic of Congo. This is a very large number of people, considering the size of Burundi and its population. These refugees come from the east of the Democratic Republic of Congo and are fleeing the insecurity caused by the armed groups that are multiplying there. This work is the result of field visits to the five refugee camps in Burundi, which resulted in a total of 90 interviews. The sample included both men and women, taking into account their social status, vulnerability, and seniority (former and new refugees). To collect the data, we used a voice recorder and a notebook at our disposal in which we put some details that needed clarification. We used Word, Excel, and SPSS to process the data. The analysis of these interviews shows the difficulties of the life of these refugees. The objective of this study is to analyze refugees' perception of durable solutions to their problem of exile. As these refugees do not expect to return home, most of them turn to resettlement. Only 37.8% have been selected for resettlement. Naturalization and repatriation, two other durable solutions, are not part of the choice of these refugees who are looking toward resettlement.","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"83 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79792655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Connectivity as the Essential Physics of Disordered Systems Elements of Percolation Theory Characterization of Porous Media Earthquakes, and Fracture and Fault in Patterns in Heterogeneous Rock Single-Phase Flow in Reservoir Rock Hydrodynamic Dispersion and Groundwater Flow in Rock Two-Phase Flow in Porous Media Transport, Reaction, and Deposition in Evolving Porous Media Fractal Diffusion and Reaction Kinetics Vibrations and Density of States of Disordered Materials Structural, Mechanical, and Rheological Properties of Branched Polymers and Gels Morphological and Transport Properties of Composite Media Hopping Conductivity of Semiconductors Percolation in Biological Systems.
{"title":"Applications of Percolation Theory","authors":"M. Sahini, M. Sahimi","doi":"10.1201/9781482272444","DOIUrl":"https://doi.org/10.1201/9781482272444","url":null,"abstract":"Connectivity as the Essential Physics of Disordered Systems Elements of Percolation Theory Characterization of Porous Media Earthquakes, and Fracture and Fault in Patterns in Heterogeneous Rock Single-Phase Flow in Reservoir Rock Hydrodynamic Dispersion and Groundwater Flow in Rock Two-Phase Flow in Porous Media Transport, Reaction, and Deposition in Evolving Porous Media Fractal Diffusion and Reaction Kinetics Vibrations and Density of States of Disordered Materials Structural, Mechanical, and Rheological Properties of Branched Polymers and Gels Morphological and Transport Properties of Composite Media Hopping Conductivity of Semiconductors Percolation in Biological Systems.","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"4 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78954658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.12988/ams.2023.917446
S. Bertarelli, C. Lodi, S. Ragni
Natural resource stocks are drastically shrinking and the contempo-rary debate on depletion of reserves highlights their crucial role over time. This paper deals with the management of exhaustible resources when recycling and extraction are employed, as well as the short-term effects of the economic transition towards circularity on consumption and welfare. Mathematical modeling may support effective plans for maximizing social welfare and protecting the environment. Concerning the production of a certain good, an optimal control model is studied to allocate labor between mining and recycling over a finite time horizon. A suit-able scrap value function allows for reducing waste and maintaining natural stock in the forthcoming future. Well-posedness of the problem is proved and some qualitative features of the optimal solution are stated.
{"title":"Non-renewable input and waste stock: optimal transition towards circularity","authors":"S. Bertarelli, C. Lodi, S. Ragni","doi":"10.12988/ams.2023.917446","DOIUrl":"https://doi.org/10.12988/ams.2023.917446","url":null,"abstract":"Natural resource stocks are drastically shrinking and the contempo-rary debate on depletion of reserves highlights their crucial role over time. This paper deals with the management of exhaustible resources when recycling and extraction are employed, as well as the short-term effects of the economic transition towards circularity on consumption and welfare. Mathematical modeling may support effective plans for maximizing social welfare and protecting the environment. Concerning the production of a certain good, an optimal control model is studied to allocate labor between mining and recycling over a finite time horizon. A suit-able scrap value function allows for reducing waste and maintaining natural stock in the forthcoming future. Well-posedness of the problem is proved and some qualitative features of the optimal solution are stated.","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"39 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87491259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.12988/ams.2023.917395
Min-Jen Jou, Jenq-Jong Lin, Guan-Yu Lin
A set D of vertices of G is an independent dominating set if no two vertices of D are adjacent and every vertex not in D is adjacent to at lest one vertex in D . The independent domination number of a graph G , denoted by i ( G ), is the minimum cardinality of an independent dominating set in G . A unicyclic graph is a connected graph containing exactly one cycle. For k ≥ 1, let H ( k ) be the set of unicyclic graphs H satisfying i ( H ) = k . In this paper, we provide a constructive characterization of H ( k ) for all k ≥ 1.
{"title":"A characterization of unicyclic graphs with the same independent domination number","authors":"Min-Jen Jou, Jenq-Jong Lin, Guan-Yu Lin","doi":"10.12988/ams.2023.917395","DOIUrl":"https://doi.org/10.12988/ams.2023.917395","url":null,"abstract":"A set D of vertices of G is an independent dominating set if no two vertices of D are adjacent and every vertex not in D is adjacent to at lest one vertex in D . The independent domination number of a graph G , denoted by i ( G ), is the minimum cardinality of an independent dominating set in G . A unicyclic graph is a connected graph containing exactly one cycle. For k ≥ 1, let H ( k ) be the set of unicyclic graphs H satisfying i ( H ) = k . In this paper, we provide a constructive characterization of H ( k ) for all k ≥ 1.","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"1 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88950387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.12988/ams.2023.918528
Meiyang Zhang, Jingli Xie, Hongli Guo
In this paper, we consider a predator-prey model with fear effect, cooperation, stage structure and refuge. The local stability and Hopf bifurcation of positive equilibrium point with time delay as parameter are discussed under different conditions of time delay. When the time delay is equal to the critical value, Hopf bifurcation occurs at the positive equilibrium point of the model. Finally, the previous findings are verified by numerical simulation.
{"title":"The impact of fear effect on the dynamics of a double delays predator-prey model with stage structure, cooperation and refuge","authors":"Meiyang Zhang, Jingli Xie, Hongli Guo","doi":"10.12988/ams.2023.918528","DOIUrl":"https://doi.org/10.12988/ams.2023.918528","url":null,"abstract":"In this paper, we consider a predator-prey model with fear effect, cooperation, stage structure and refuge. The local stability and Hopf bifurcation of positive equilibrium point with time delay as parameter are discussed under different conditions of time delay. When the time delay is equal to the critical value, Hopf bifurcation occurs at the positive equilibrium point of the model. Finally, the previous findings are verified by numerical simulation.","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135798562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.12988/ams.2023.918526
Jose-Salathiel Kossa-Kongbowali
In this paper, we propose a new method called Simultaneous Co-Inertia Analysis type 2 (SCIA2), which is a new approach of Simultaneous Co-Inertia Analysis (SCIA) in the context of two vertical multi-tables. The objective is to study the stability of the relationships be-tween pairs of tables having the same individuals, by constructing the common axes of representation of variables and individuals simultaneously, that is to say to construct in a single move, a orthogonal matrix containing the solutions. In ecology by example, this method consisting being describe the evolution of the fauna-environment relationship from one season to another. This method was programmed with the software scilab and the charts with the software R.
{"title":"New approach of analysis of the relationship between two vertical multi-tables: SCIA2 method","authors":"Jose-Salathiel Kossa-Kongbowali","doi":"10.12988/ams.2023.918526","DOIUrl":"https://doi.org/10.12988/ams.2023.918526","url":null,"abstract":"In this paper, we propose a new method called Simultaneous Co-Inertia Analysis type 2 (SCIA2), which is a new approach of Simultaneous Co-Inertia Analysis (SCIA) in the context of two vertical multi-tables. The objective is to study the stability of the relationships be-tween pairs of tables having the same individuals, by constructing the common axes of representation of variables and individuals simultaneously, that is to say to construct in a single move, a orthogonal matrix containing the solutions. In ecology by example, this method consisting being describe the evolution of the fauna-environment relationship from one season to another. This method was programmed with the software scilab and the charts with the software R.","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135701418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.12988/ams.2023.917391
Xin Chang, Muyuan Liu, Liang Yan
In this paper, based on the line-search technique, an iteration method to solve pseudomonotone variational inequality problem in 2-uniformly convex Banach spaces is introduced. The iteration scheme presented in this paper is proved to converge strongly to a solution of the pseudomonotone variational inequality problem. Our result extends the main result in [4]
{"title":"The strong convergence for solutions of pseudomonotone variational inequality problem in Banach spaces","authors":"Xin Chang, Muyuan Liu, Liang Yan","doi":"10.12988/ams.2023.917391","DOIUrl":"https://doi.org/10.12988/ams.2023.917391","url":null,"abstract":"In this paper, based on the line-search technique, an iteration method to solve pseudomonotone variational inequality problem in 2-uniformly convex Banach spaces is introduced. The iteration scheme presented in this paper is proved to converge strongly to a solution of the pseudomonotone variational inequality problem. Our result extends the main result in [4]","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"28 4C 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77635823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.12988/ams.2023.917307
Giacinto Angelo Sgarro, L. Grilli
This paper proposes an algorithm to find an optimal mixture that is as close as possible to an ideal solution, starting from a set of elements (items) described by a set of variables (features). This class of optimization problems can be tackled through traditional approaches belonging to the field of operations research (OR) or even through meta-heuristics techniques belonging to the field of artificial intelligence (AI). In order to present an artificial intelligence perspective, this paper uses a genetic algorithm (GA) model which proves its consistency through the comparison with a linear programming (LP) solver on a set of 8-items 5-features experiments. Results show that the proposed GA converges towards the global optimum and provides competitive results
{"title":"Genetic algorithm for optimal multivariate mixture","authors":"Giacinto Angelo Sgarro, L. Grilli","doi":"10.12988/ams.2023.917307","DOIUrl":"https://doi.org/10.12988/ams.2023.917307","url":null,"abstract":"This paper proposes an algorithm to find an optimal mixture that is as close as possible to an ideal solution, starting from a set of elements (items) described by a set of variables (features). This class of optimization problems can be tackled through traditional approaches belonging to the field of operations research (OR) or even through meta-heuristics techniques belonging to the field of artificial intelligence (AI). In order to present an artificial intelligence perspective, this paper uses a genetic algorithm (GA) model which proves its consistency through the comparison with a linear programming (LP) solver on a set of 8-items 5-features experiments. Results show that the proposed GA converges towards the global optimum and provides competitive results","PeriodicalId":49860,"journal":{"name":"Mathematical Models & Methods in Applied Sciences","volume":"10 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90195641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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