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In order to achieve an increase in the profitability of tissue paper production, this research aimed to identify factors that affect the degree of pulp refinement and the tension index of the tissue paper when using short fiber, long fiber and Quimizine B enzyme. The methodology considered laboratory experiments, obtaining refining curves, multilevel factorial design and response surface diagrams. The results indicated that the most significant common factor in the pulp refining degree and tension index is the specific energy consumption for both types of fiber, and that optimal operating parameters can be known by analyzing the refining degree and tension index independently and simultaneously. It was concluded that the multilevel factorial design allowed to identify significant factors that influence the properties of the refining degree and the resistance of tissue paper when looking for an individual and simultaneous optimum and, that the influence of the enzyme increased the properties of the refining degree and the tensile strength of the paper when using raw material of short and long fiber from Eucalyptus globulus and Pinus radiata, respectively. [ABSTRACT FROM AUTHOR]

The University of Alcalá in Madrid will organize the "III International Congress on Green Public Procurement and Climate Change" on October 4th and 5th, 2023. The congress aims to receive oral communications on topics related to green public procurement and climate change, as well as tangential aspects such as sustainable food, legislation on climate change, public procurement and depopulation, sustainable infrastructure and energy efficiency, and sustainable or low-emission mobility. The Scientific Committee will review the communications and select the best ones for possible publication in the journal Actualidad Jurídica Ambiental. The deadline for submitting abstracts is May 15th, 2023. [Extracted from the article]

An energy study was performed at Pulpa Cuba Paper Mill, located in Sancti Spiritus, where an energy management system was applied according to NC: ISO 50001, in order to assess the energy system by applying energy management systems for energy and water reduction in the paper mill, in which the current steam generation, distribution and consumption system is diagnosed. The proposal of a modified energy scheme with 1 MW Backpressure Steam Turbine Generator and rehabilitation of the original boiler or installing a lower capacity boiler contributes to save financial resources by the concept of water, fuel and electricity. The implementation of four projects will save 3,095,574 CUC / y and an average payback period of about 1 year is expected. [ABSTRACT FROM AUTHOR]

Copyright of Revista Catalana de Dret Ambiental is the property of Universitat Rovira I Virgili and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Actualidad Jurídica Ambiental is the property of CIEMAT, through its Centro Internacional de Estudios de Derecho Ambiental (CIEDA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista INVI is the property of Universidad de Chile and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Economía, Sociedad y Territorio is the property of El Colegio Mexiquense and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Álabe is the property of Alabe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Ingenieria, Matematicas y Ciencias de la Informacion is the property of Corporacion Universitaria Republicana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Actualidad Jurídica Ambiental is the property of CIEMAT, through its Centro Internacional de Estudios de Derecho Ambiental (CIEDA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Actualidad Jurídica Ambiental is the property of CIEMAT, through its Centro Internacional de Estudios de Derecho Ambiental (CIEDA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Actualidad Jurídica Ambiental is the property of CIEMAT, through its Centro Internacional de Estudios de Derecho Ambiental (CIEDA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Tecno Lógicas is the property of Instituto Tecnologico Metropolitano and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cimexus is the property of Revista CIMEXUS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Fuentes, El Reventón Energético is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The paper presents a case study of a hydroelectric facility with water depletion problems. The objective was to evaluate the use of the available hydro-energy potential by applying an integrating methodology contributing to the improvement of energy efficiency and the use of water resources in the process of transforming hydraulic energy into electricity. The results demonstrate the existence of overconsumption of available water and oversizing of the mechanical transmission, both of which constitute operating problems. The solution to the problem, although simple, provided a methodology that integrates knowledge of fluid dynamics, hydraulic turbines, electrical machines and machine elements. The analyzed problem constitutes an integrating exercise for undergraduate and postgraduate teaching in the area of Hydroenergy and the rational use of water resources. [ABSTRACT FROM AUTHOR]

Copyright of Revista del Museo de Antropología is the property of Museo de Antropologia - IDACOR and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Boletín de Ciencias de la Tierra is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Politécnica is the property of Politechnico Colombian Jaime Isaza Cadavid and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

SMACH (Multi-agent Simulation of Human Activity and Household Consumption) is a simulation platform within EDF's R&D framework. It uses simulation to anticipate and reduce energy consumption at different places of analysis (home, district, town, country). With this paper we aim to explain what the course of action technological research program involves, and to this end we refer to several years of SMACH research. We essentially focus on the importance of the organic relationship between technology and human activity, and we show how this organic relationship evolves over the different stages that this technological research program involves. This paper may be viewed as a basis for generalizing and clarifying the criteria required to validate such a program and as a contribution towards reflection on design in ergonomics. [ABSTRACT FROM AUTHOR]

Maintenance, that by definition, it is directed to "the realization of a group of operations and technical activities that assure the conservation, preservation and correction of AFT during a period of certain time against the deterioration that can cause the use and continuous exploitation as well as the noxious effects of the environment, and taken it to end at a reasonable cost and with the necessary security for people" With this article it is sought to base this unquestionable necessity and the importance of learning on the adequate use of this science; and the paper that the "Maintenance" and its impact have in the economic results of industrial enterprises. Maintenance, also gives answer to establishments of our days, such as the increment of the energy efficiency, the reduction of import of spare parts and the profitability of the companies, all of great importance for Cuban economy. Will be analyzed the insufficient use that industrial enterprises do of all the learning capacity that high education has. [ABSTRACT FROM AUTHOR]

Copyright of Araucaria is the property of Araucaria-Revista Iberoamericana de Filosofia, Politica y Humanidades and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Actualidad Jurídica Ambiental is the property of CIEMAT, through its Centro Internacional de Estudios de Derecho Ambiental (CIEDA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Actualidad Jurídica Ambiental is the property of CIEMAT, through its Centro Internacional de Estudios de Derecho Ambiental (CIEDA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The existing combined regulation methods do not lead to efficient management of water in isolated hydraulic turbines; these do not prioritize the minimization of the value of the resistive dump load. In this paper, a frequency regulation scheme was proposed that combines a minimum dump resistive load and the flow of the Pelton turbines that operate autonomously. At the begining on this paper was identified the state of the art of autonomous isolated hydro. Also was charactererized in cuban contect and the posibilities of dump load and flow cntrolls methods. Finally was evauated the combination of this two methods due to a generalized cuban study case. The simulation results of the method in Matlab®/Simulink was processed through a case study, from models obtained in previous investigations, contrasted with benchmark reported in the literature. With this scheme it was possible to increase the energy efficiency of autonomous mini-hydroelectric plants. Through simulation the proposed scheme was validated in a way that complies with Cuban standard NC62-04, with a reduction of the resistive dump load at 6% of the generator nominal power value. [ABSTRACT FROM AUTHOR]

The circular economy (CE) model promotes the production of goods and services in a sustainable way, optimizing the consumption of natural resources and mitigating the wastes. In the last years, this model has received a lot of attention and support at the governments' level, internationally; also, in Latin America. Cuba pleads for a sustainable development, with political and incentives for the recycling, the use of the renewable sources and the energy efficiency, as impeller motor of its economic model. Hence, Cuban universities have been requested to include this topic in their study plans, for all the careers. The objective of this paper is to describe how the topic of Circular Economy has been incorporated in the Study Plan of the Electrical Engineering Career at the Technological University of Havana "José A. Echeverría "CUJAE and the results, during the implementation in the 2021 academic year. [ABSTRACT FROM AUTHOR]

Due to the constant growth of global environmental pollution, the sectors related to the electrical industry have focused on finding solutions to achieve efficient energy consumption. Among the devices that have been incorporated to carry out improvements in electricity consumption are smart sockets. This paper presents a prototype for a general-purpose smart socket. The design considers the main components of a smart plug: measurement unit, control unit, processing unit, and communication interface. The prototype is based on free hardware, with easy access, low cost, and consumption. This work successfully developed a device capable of measuring, controlling, and monitoring the electrical behavior of equipment connected to the power grid. Additionally, it incorporates temperature, light, and humidity sensors to complement the electrical measurements. The prototype presented offers the possibility of developing many functionalities and services aimed at energy efficiency on the topic of the Internet of Things (IoT). [ABSTRACT FROM AUTHOR]

Copyright of Revista Catalana de Dret Ambiental is the property of Universitat Rovira I Virgili and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Ingeniería Industrial is the property of Departamento de Ingenieria Industrial, Universidad del Bio-Bio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

On 26 April 1986, one of the most important events in the history of nuclear energy took place: the Chernobyl accident. This historic event marked the decline of the Soviet Union, an environmental agenda and new geopolitics of the world. It has been portrayed in literature, film, photo-reportage and documentary, among others. This paper seeks to analyse and contrast the HBO series Chernobyl (2019) and Svetalna Alexievich's Voices from Chernobyl (1997), specifically the relationship between reality and literary and filmic reconstruction. For this purpose, we use a descriptive-argumentative logic and a visual analysis with a mixed methodology. The analysis reveals a conflictive relationship between the two works, since the testimonies recorded in the book are easily recognisable in the series, although the latter has never specified that they are based on the book. Among the conclusions, the narrative structure carrying ideology (which seeks to strengthen a collective imaginary over the commonly accepted biases about the Soviet Union and its model of socialism), carried out with remarkable art direction, stands out. Finally, the series comes at a time of widespread debate in civil society about the use of nuclear energy, just as the end of the current model of fossil fuel-based energy generation for society and heavy industry approaches. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Ciencias Sociales (13159518) is the property of Revista de Ciencias Sociales de la Universidad del Zulia Venezuela and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Semestre Económico is the property of Sello Editorial de la Universidad de Medellin and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Electric mobility is a sustainable alternative that allows the reduction of energy consumption and the emission of polluting gases with respect to conventional mobility. There are projections that predict an increase in the use of electric vehicles. Thus, several lines of research deal with the characteristics of the integration of these new demands and the effects that will occur on electrical systems. The main goals of this paper are: (i) to determine the impact of a moderate insertion of public charging points on the network; (ii) to evaluate the penetration level of EVs of residential users for slow and semi-fast home charging modes (G2V), according to restrictions of operation variables from the grid; and (iii) to propose some management strategies for controlled recharging and the dual function of charging and supplying energy from the electric vehicles to the grid through their storage batteries (V2G). The obtained results show that the moderate incorporation of public charging points does not significantly affect the operability of the network. Furthermore, it is shown that the controlled recharging of electric vehicles manages to reduce the negative impacts on the electrical system under study, allowing higher levels of insertion and/or delaying investments in the electrical infrastructure. An operation mode with energy from the electric vehicles to the grid would allow displacing the peak generation characterized by its high levels of pollution. Nevertheless, this mode of operation makes the system more susceptible to operating within inadmissible ranges. [ABSTRACT FROM AUTHOR]

This paper approaches the issue of the partial introduction of electric vehicles in the public transport sector, analyzing the possible reduction of environmental pollution and fossil fuel consumption by replacing part of the real fleet as the main aim. Starting from the previous analyzes and the characterization of the vehicles fleet belonging to the company, a substitution is proposed based on the changes that would be made in the associated electrical system, as well as the electric vehicle technology itself through the technical, economic and environmental evaluation, taking into account two prototypes that are currently working. The results of the research show the benefits of replacing internal combustion cars with electric ones, based on the savings obtained in operation and maintenance, as well as the reduction of greenhouse emissions. [ABSTRACT FROM AUTHOR]

The best tilt for solar air collector working in natural convection regime under Cubans conditions. The paper dealt with the modeling of a flat solar collector for air heating operating in a natural convection regime in Cuba. The angle of tilt for the collector which allows the greatest extraction of energy and a greater annual energy efficiency of the installation was determined. The collector simulation is performed by varying the tilt angle, looking for the one with the highest efficiency. A numerical approach following the finite volume method was applied. The calculations were carried out in steady state and the flow regime was turbulent. The tilt angle having the best energy efficiency was obtained ranging from 45o to 50o. Due to the similarity between the mass flow behavior and annual average efficiency, the mass flow and its influence on useful heat are the predominant effect in the efficiency changes. An asymmetric velocity profile was found since the higher speeds are reached in the lower half of the collector. [ABSTRACT FROM AUTHOR]

This paper analyzes the conditions facing the oil refining industry in Mexico and the factors that shaped its overhaul in the context of the 2013 Energy Reform. To do so, the paper examines the main challenges that refining companies must tackle to stay in the market, evaluating the specific cases of the United States and Canada. Similarly, it offers a diagnosis of refining in Mexico, identifying its principal determinants in order to, finally, analyze its prospects, considering the role of private initiatives in the open market, as well as Petróleos Mexicanos (Pemex), as a placeholder in those areas where private enterprises do not participate. [ABSTRACT FROM AUTHOR]

Copyright of Urbano is the property of Departamento de Planificacion y Diseno Urbano, Universidad del Bio-Bio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Today, the development of human life depends on the supply of energy obtained mainly from fossil fuels. This resource is limited and its availability finite. Solar energy can meet the needs of the global population. Concentrated solar energy uses a mirrored surfaces that reflects and concentrates the rays in a receiver that absorbs the solar energy transferring it as heat to the fluid that circulates inside it and that can be used in processes that need thermal energy. The efficiency of the system depends on the optical quality of the concentrating mirror. In this paper, the optical efficiency(ηop) of a prototype parabolic disk is determined using a calorimeter, which acts as a receiver, being the value ηop=0,71±0,02. The method is validated by applying a modified Hartmann's optical scanning test, the values wereηop=0,70±0,02 for the of intercept factor method and ηop=0,69±0,02 for the optical simulation. [ABSTRACT FROM AUTHOR]

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Revista Ingeniería Industrial is the property of Departamento de Ingenieria Industrial, Universidad del Bio-Bio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Revista Ingeniería Industrial is the property of Departamento de Ingenieria Industrial, Universidad del Bio-Bio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Observatorio Medioambiental is the property of Universidad Complutense de Madrid and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Semestre Económico is the property of Sello Editorial de la Universidad de Medellin and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Observatorio Medioambiental is the property of Universidad Complutense de Madrid and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)