scholarly journals Mathematical Models Issues of Environmental Management

Author(s):  
Viorel Pop

Abstract Today the world is facing, more and more, different sources of pollution, the most affected areas being the proximity of big industrial centers (e.g.: chemistry, mining and metallurgy, machinery building etc.). Baia Mare industrial area is a typical one for such a situation. To maintain a clean and healthy environment in Baia Mare city and in the surrounding areas, important costs are needed. The usefulness of the mathematical models consists in the possibility of mathematical processing of industrial parameters evolutions, with relevant interpretations on various influences and their correction for achieving the set goals (maximizing financial efficiency, environmental protection with the compliance of legal requirements etc.)

1982 ◽  
Vol 14 (12) ◽  
pp. 107-125 ◽  
Author(s):  
Roland Wollast

A comparison of the concentration of dissolved and of particulate heavy metals in the aquatic system indicates that these elements are strongly enriched in the suspended matter. The transfer between the aqueous phase and the solid phase may be due to dissolution-precipitation reactions, adsorption-desorption processes or biological processes. When these processes are identified, it is further possible to develop mathematical models which describe the behaviour of these elements. The enrichment of heavy metals in the particulate phase suspended or deposited and in aquatic organisms constitutes a powerful tool in order to evaluate sources of pollution.


1998 ◽  
Vol 37 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Marie-Christine Gromaire-Mertz ◽  
Ghassan Chebbo ◽  
Mohamed Saad

An experimental urban catchment has been created in the centre of Paris, in order to obtain a description of the pollution of urban wet weather flows at different levels of the combined sewer system, and to estimate the contribution of runoff, waste water and sewer sediments to this pollution. Twenty-two rainfall events were studied from May to October 1996. Dry weather flow was monitored for one week. Roof, street and yard runoff, total flow at the catchment outlet and waste water were analysed for SS, VSS, COD and BOD5, on both total and dissolved fraction. Results show an evolution in the characteristics of wet weather flow from up to downstream: concentrations increase from the catchment entry to the outlet, as well as the proportion of particle-bound pollutants and the part of organic matter. A first evaluation of the different sources of pollution establishes that a major part of wet weather flow pollution originates from inside the combined sewer, probably through erosion of sewer sediments.


2019 ◽  
Vol 3 (2) ◽  
pp. 61-64
Author(s):  
Andri Harmoro Kusumo Broto ◽  
Sofyan Mahardika Rahardi ◽  
Mega Andriana Jane ◽  
Kinanti Ayu Wigaringtyas ◽  
Abdullah G Toda ◽  
...  

 Batik is a picture art that is poured in a piece of cloth that is one of the Indonesian nation's identity that is recognized as World heritage. Unesco has set Batik as a Masterpieces of the Oral and the Intangible Heritage of Humanity on October 2, 2009. In Indonesia, Batik has expanded and penetrated the market share as the development of fashion in the world. Motives that exist in the market is also various types and apparently. Among others: Batik Mega Mendung, Batik Parang Rusak, Batik Kawung, etc. Which makes each type of batik has a different aesthetic value is different its uniqueness.. Dyeing techniques also vary from dyeing techniques, connective techniques, jumputan techniques etc.. Seeing this opportunity encourages the emergence of the idea of making Batik, but replace the use of the night with Leaf Betel. Leaf Betel  itself is only used as medicine or herbal medicine by the surrounding community. With this idea, in addition to raising the economic value of Leaf Betel, the original legacy of Indonesia can also be preserved. Starting from drawing sketches on mori cloth, then burst the Batik motif with Scratches Ginger Leaf Betel on it using Nails. After this step is passed, continued the coloring, for staining time required about 1-2 hours for 1x1 meter sized fabric. The results are sold in the form of batik cloth, and marketed through social media, and sold directly in the area of Madiun and surrounding areas.


2018 ◽  
Vol 1 (1) ◽  
pp. 55
Author(s):  
Karto Wijaya ◽  
Heru Wibowo

This developing area provides a very wide potential in the development as an area that has excellent products or development projects in Bandung. Cigondewah area has the potential to become this area as a creative industrial area that can support the income of the people and the city of Bandung. Cigondewah is one of the areas known as the Cigondewah environment and surrounding areas as a creative industrial area about the utilization of textile industry waste that sells the rest of cloth from factories around the city of Bandung. The area of Cigondewah grows and develops with the uniqueness of the community itself that will take advantage of opportunities from the textile industry, homes along the road corridor that turns into the shelter, the community into warehouses and shops to sell fabrics.It is also the aim of the government to promote and develop tourist areas Cigondewah for the future to be better again to enhance the identity of the area Cigondewah as a tourist area fabric shopping in the city of Bandung. This study aims to determine the development of creative industries in Cigondewah. Cigondewah Textile Tourism Area of Bandung City, especially Capacity Building, to show the identity and image of Cigondewah area as a textile tourism area in Bandung City. The identity of Cigondewah area which is currently called Cigondewah as Tourism Shopping Area Cloth. From this research is expected to give an idea that the environment is in the corridor Cigondewah road.


Author(s):  
Kirk Elizabeth A

This chapter considers the approaches taken by international regimes to address marine pollution. It identifies similarities and differences in approaches across time and different sources of pollution, the degree to which they follow an adaptive management approach, and the role of science in decision-making. It begins with an overview of the historical development of the law. It then discusses the current regime, covering general obligations and certain source-specific obligations. The final section contains conclusions and a discussion of current and future issues.


Vestnik MGSU ◽  
2020 ◽  
pp. 294-306
Author(s):  
Aleksandra V. Ostyakova ◽  
Ekaterina V Pluisnina

Introduction. Studying water body ecological problems and ensuring the necessary level of sanitary maintenance and landscaping of the reservoirs with the surrounding areas are relevant due to the inadequate environmental condition of a large number of urban water bodies and small rivers within settlements. Materials and methods. The review of the available normative documents and the carried-out actions on the improvement of city water objects is given. Based on the visual study of the state of the pond banks at the Karbyshev Park at the settlement of Nakhabino, Moscow region, water quality indicators, sources of pollution of the pond, the article concluded on the unsatisfactory ecological and aesthetic condition of this urban pond. The objective of this paper is to analyze the existing negative environmental factors affectig the water body and to propose an option of the site landscaping and further safe usage. Results. A description of the Karbyshev Park territory is given. Also, negative factors influencing the pollution of the pond banks, and the quality of pond water are specified. A proposal contains a list of necessary types of activities on cleaning and improving the pond bowl and surrounding territory under the condition of preservation of its ecosystem. As a result of the integrated assessment of the pond ecological state, a model of the urban water body was created, and a variant of its ecological reconstruction was proposed. Conclusions. The study is of practical importance for accounting and elimination of environmental problems of urban water bodies of the Central European Russia and proposals of measures for their improvement and reclamation.


2019 ◽  
Vol 2 ◽  
pp. 199
Author(s):  
Olga Kakovkina

The purpose of the article is to figure out the features of a foreign presence in the city and the region during 1945–1959, its intensity and content on the example of the visit of foreign delegations – from the end of the World War II, as a result of which the political map of Europe and the world, the content of international relations have changed, to the assignment to Dnipropetrovsk the status of a conditionally closed city in August 1959, which led to the prohibition of its visit by foreigners until 1987.Research methods: historical-chronological, comparative.Main results: One of the aspects of foreign presence in the region is revealed on the example of target groups, which, as a rule, came at the invitation of public organizations, as well as certain departments. Some features of visiting the region by foreign delegations, quantitative indicators, the composition of individual groups, residence programs, service problems were identified. It was found that a certain limit in visiting foreigners to the region, as well as in the whole USSR, was 1953, when, as a result of the liberalization of the foreign policy of the Soviet leadership, the foreign presence in the region became more massive and public. Dnipropetrovsk and the surrounding areas, along with Kyiv, Kharkiv, Zaporizhzhya, were one of the visiting points. The purpose of its visits was to familiarize with the Soviet reality for the formation of a certain image of the USSR, to demonstrate the "advantages" of the Soviet model, and, therefore caused a significant ideological load of programs and strict control by the party bodies. Since the mid-1950s, with the intensive development of international economic relations in the region, primarily in heavy industry, the number of delegations with production targets had been growing. The economic component of relations dominated the tourism sector, which almost did not cover the Dnipropetrovsk region, given the formation of closed industries. In conclusion, it was noted that already at the stage of late Stalinism, the city and region were a significant part of the international presentation of the USSR and Ukraine. However, the stay of foreign groups revealed significant problems in their service due to material difficulties, lack of experience and personnel, and the specifics of organizing admissions under conditions of totalitarian state.Practical significance: the article recommended for the practice of teaching and research regional and urban history.Originality: sources that were first introduced to scientific circulation were used – the Central State Archive of the Public Organizations of Ukraine, the State Archive of the Dnipropetrovsk Region (oblastʼ) and regional periodicals of the period.Scientific novelty: the issue of the presence of foreign delegations in the Dnipropetrovsk region during 1945–1959 was considered, the problem of the place of Dnipropetrovsk region, Dnipropetrovsk in the system of international relations of Ukraine of the totalitarian period was determined.Article type: explanation.


Author(s):  
V. Sokolov

The article considers features of the East Asian machinery-building cluster. It differs from the older machinery-building clusters in West Europe and North America primarily. The share of intermediate goods in the imports of the East Asian countries is higher than the share of such goods in their exports. This results from prevalence of the assembly manufactures in their industry. The international supply chains of the region are described as follows: manufacturing parts and components in the countries of East and South-East Asia – assembly in China – exports to USA, Europe and Japan. The changes in the structure of the international supply chains in 2007–2011 are shown in the case of telecommunications industry. It is established that the structure of the telecommunications imports of the USA has changed in favor of China. The technological level of the telecommunications equipment exported from China enhanced significantly. The share of parts and components in China’s telecommunications exports increased. Imports of telecommunications equipment from Japan to USA diminished whereas its delivery from China to Japan more than doubled. This points to reduction of the role of Japan as the supplier of telecommunications equipment in the world scale.


Author(s):  
Salvador Miranda Lima ◽  
José Moreira

The emergence of the World Wide Web made available massive amounts of data. This data, created and disseminated from many different sources, is prepared and linked in a way that is well-suited for display purposes, but automation, integration, interoperability or context-oriented search can hardly be implemented. Hence, the Semantic Web aims at promoting global information integration and semantic interoperability, through the use of metadata, ontologies and inference mechanisms. This chapter presents a Semantic Model for Tourism (SeMoT), designed for building Semantic Web enabled applications for the planning and management of touristic itineraries, taking into account the new requirements of more demanding and culturally evolved tourists. It includes an introduction to relevant tourism concepts, an overview of current trends in Web Semantics research and a presentation of the architecture, main features and a selection of representative ontologies that compose the SeMoT.


Author(s):  
Alain Goriely

Models are central to the world of applied mathematics. In its simplest sense, a model is an abstract representation of a system developed in order to answer specific questions or gain insight into a phenomenon. In general, we expect a model to be based on sound principles, to be mathematically consistent, and to have some predictive or insight value. Models are the ultimate form of quantification since all variables and parameters that appear must be properly defined and quantified for the equations to make sense. ‘Do you believe in models? Simplicity and complexity’ discusses the complexity of models; the steps involved in developing mathematical models—the physics paradigm; and collaborative mathematical modelling.


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