scholarly journals Piezoeletricity as an Alternative Source of Electric Power Generation in an Education Institution in the Amazon

2019 ◽  
Vol 7 (11) ◽  
pp. 467-474
Author(s):  
Yasmin Souza de Carvalho ◽  
Elizeu Moraes da Silva ◽  
Fabiana Rocha Pinto ◽  
David Barbosa de Alencar ◽  
Igor Felipe Oliveira Bezerra
Keyword(s):  
Energy Production ◽  
Large Scale ◽  
New Technology ◽  
Education Institution ◽  
Clean Energy ◽  
Piezoelectric Ceramics ◽  
Production Model ◽  
Small Scale ◽  
Alternative Source ◽  
Short Time

The development of technologies for the generation of clean and sustainable energy has brought significant changes to the energy sector in Brazil and worldwide. The newest technology is piezoelectricity, which although it has been studied for years, has not yet gained its proper space in the national and international electrical matrices. With this in mind, the present work aims to describe the process of installing a prototype carpet using piezoelectric ceramics that, through a force applied by any individual, is capable of generating enough energy for the operation of a turnstile in a HEI from Manaus-AM. The application was tested by modeling applying mathematical equations in the working of the prototype developed by APC International. Different answers were obtained considering the different dimensions for the piezoelectric parts. However, it is understood that this energy production model, treated as a new technology, presents economic viability in its implementation. One of the results demonstrates that the smaller the ceramic piece, the greater the energy production and can be adapted over time to respond to large productions. Thus, it is concluded from the calculations made that piezoelectric ceramics is an excellent alternative for the production of clean energy on a small scale, in a short time, and in the long term can reach large scale.

scholarly journals Energy Production Benefits by Wind and Wave Energies for the Autonomous System of Crete

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2741 ◽  
Author(s):  
George Lavidas ◽  
Vengatesan Venugopal
Keyword(s):  
Wind Turbine ◽  
Wave Energy ◽  
Energy Production ◽  
Large Scale ◽  
Capital Expenditure ◽  
Temporal Correlation ◽  
Clean Energy ◽  
Limiting Factor ◽  
Spatio Temporal ◽  
Visual Impacts

At autonomous electricity grids Renewable Energy (RE) contributes significantly to energy production. Offshore resources benefit from higher energy density, smaller visual impacts, and higher availability levels. Offshore locations at the West of Crete obtain wind availability ≈80%, combining this with the installation potential for large scale modern wind turbines (rated power) then expected annual benefits are immense. Temporal variability of production is a limiting factor for wider adaptation of large offshore farms. To this end multi-generation with wave energy can alleviate issues of non-generation for wind. Spatio-temporal correlation of wind and wave energy production exhibit that wind and wave hybrid stations can contribute significant amounts of clean energy, while at the same time reducing spatial constrains and public acceptance issues. Offshore technologies can be combined as co-located or not, altering contribution profiles of wave energy to non-operating wind turbine production. In this study a co-located option contributes up to 626 h per annum, while a non co-located solution is found to complement over 4000 h of a non-operative wind turbine. Findings indicate the opportunities associated not only in terms of capital expenditure reduction, but also in the ever important issue of renewable variability and grid stability.

scholarly journals EFFECTIVENESS OF SELF-SCREENING INSTRUMENT IN ASSESSING THE CONDITION OF PARTICIPANTS IN OUTDOOR ACTIVITIES

2019 ◽  
Vol 1 (1) ◽  
pp. 8-15
Author(s):  
Endang Sepdanius ◽  
Anton Komaini ◽  
Muhammad Sezelirifki
Keyword(s):  
Large Scale ◽  
Screening Instrument ◽  
Health Condition ◽  
Small Scale ◽  
Study Phase ◽  
Outdoor Activities ◽  
Test Information ◽  
Scale Test ◽  
Main Thing ◽  
Short Time

Special attention is given to participants in outdoor activities to remain safe. Preparation is the main thing to keep our health physically and psychologically. Therefore we need an instrument to assess personal health condition easily and precisely. The results obtained are used to make a decision to continue the activity or consult with the doctor first before doing the activities. The aim of this research is to see the effectiveness the self-screening instrument that developed. This research did in three step as: (1) preliminary study phase, (2) Expert validation phase, (3) testing phase. The number of participant that contributed in this research were 826 participants consist of three expert, 100 participants in small scale test and 723 participants in large scale test. The result of expert’s judgment showed that self-screening instrument has content validity. The result of small-scale test showed that 19 questions were valid and in large-scale test, information was obtained in a short time about the condition of the participants, that 97.1% of the total participants who did not have problems. While 2.9% of the total participants has problems that needed consultation and recommendations from doctors. Based on these results, it can be seen that effectiveness of self screening instrument in screening participants quickly and precisely so that they can prevent the occurrence of problems related to the situation of participants.

Scheduling Algorithms Using Metaheuristics for Production Processes with Crane Interference

2018 ◽  
Vol 12 (3) ◽  
pp. 297-307 ◽  
Author(s):  
Takashi Tanizaki ◽  
Hideki Katagiri ◽  
António Oliveira Nzinga René ◽  
◽  
Keyword(s):  
Large Scale ◽  
Manufacturing Industry ◽  
Computer Experiments ◽  
Scheduling Algorithms ◽  
General Purpose ◽  
Small Scale ◽  
Production Processes ◽  
Large Scale Problems ◽  
Operational Constraints ◽  
Short Time

This paper proposes scheduling algorithms using metaheuristics for production processes in which cranes can interfere with each other. There are many production processes that involve cranes in manufacturing industry, such as in the steel industry, so a general purpose algorithm for this problem can be of practical use. The scheduling problem for this process is very complicated and difficult to solve because the cranes must avoid interfering with each other plus each machine has its own operational constraints. Although several algorithms have been proposed for a specific problem or small-scale problem, general purpose algorithms that can be solved in real time (about 30 minutes or less) in the company’s production planning work have not been developed for large-scale problems. This paper develops some metaheuristic algorithms to obtain suboptimal solutions in a short time, and it confirms their effectiveness through computer experiments.

scholarly journals Geo-Spatially Based Analysis And Economic Feasiblity Evaluation Of Waste-To-Energy Facilities: A Case Study Of Local Government Areas Of Anambra State Of Nigeria

2021 ◽  
Author(s):  
Emmanuel Chukwuma ◽  
John Ojediran ◽  
Daniel Azikiwe Anizoba ◽  
Joseph Azikiwe Ubah ◽  
Pius Nwachukwu
Keyword(s):  
Local Government ◽  
Large Scale ◽  
Clean Energy ◽  
Economic Feasibility ◽  
Waste To Energy ◽  
Small Scale ◽  
Optimum Number ◽  
Organic Fraction ◽  
Anambra State

Abstract Access to affordable clean energy source as stipulated in UN SDG goal number 7 is important for the development and socio-economic well-being of people, the need for proper assessment of resources to achieve this goal is indisputable. The goal of this study is to assess the economic feasibility of utilizing organic fraction of Municipal Solid Wastes (MSWof) using a case study of 21 Local Government Areas (LGA) or Authority for Anambra State of Nigeria for waste to energy project. The quantity of organic fraction of MSW, energy recovery and optimum number of plants at the various LGAs was estimated. The result of the study indicates that about 198 tons maximum value of MSWof can be generated daily in Aguata LGA, with electric energy potential value of 545MW. The number of plants for the LGAs ranged from 10 to 50 and from 3 to 12 for small and medium scale plants. A large scale plant of about 50m3 can possibly be installed at all the LGAs, with a maximum of 4 plants in Idemili and Aguata LGA. The economic assessment based on Net Present Value (NPV) criteria shows poor economic feasibility for small scale plant, while NPV was positive for medium and large scale plants. The Internal Rate of Return (IRR) ranged from 0.32 to 0.94, with a general increase from small scale to large scale economic feasibility. It is suggested that the autonomy of the various LGAs in the country should serve as a major motivation in adopting bio-energy projects independently, and this study will serve as a decision toolkit in the appropriate scale to be adopted.

scholarly journals ORDEN HÍDRICO: PRÁCTICAS E INSTITUCIONES EN MENDOZA, ARGENTINA

2014 ◽  
Vol 9 (17) ◽  
pp. 117
Author(s):  
Paula Cecilia Mussetta
Keyword(s):  
Resource Management ◽  
Water Resource ◽  
Water Resource Management ◽  
Large Scale ◽  
Analytical Framework ◽  
Wine Industry ◽  
Production Model ◽  
Small Scale ◽  
Hydrologic Regime ◽  
Institutional Relationships

Este artículo aborda el campo del manejo de los recursos hídricos y propone un esquema de análisis para estudiar las relaciones entre las instituciones y las prácticas de los actores afectados por las acciones de tales instituciones. Avanza después, en forma preliminar y descriptiva, sobre la exploración de algunas de las categorías presentadas en el esquema propuesto en un caso concreto (Mendoza, Argentina). Reconocemos una doble dinámica de funcionamiento del régimen hídrico: una entre la autoridad hídrica y los grandes y poderosos actores vitícolas y otra entre un conjunto de entidades satélites no hídricas y pequeños productores. Esto lleva a que desde la política hídrica se reproduzca un modelo de producción que claramente beneficia a un sector a costa de otro.   HYDROLOGIC ORDER: PRACTICES AND INSTITUTIONS IN MENDOZA, ARGENTINA This article addresses the territory of water resource management and proposes an analytical framework to study the inter-institutional relationships and practices of the stakeholders affected by the actions taken by those institutions. It explores in a preliminary and descriptive form some of the categories presented in the framework proposed for the specific case of Mendoza, Argentina. It identifies a double working dynamic in the hydrologic regime: one between the hydrologic authorities and large-scale and powerful stakeholders of the wine industry and another dynamic between a series of non-hydrologic satellite entities and small-scale producers. This leads to a hydrologic policy that reproduces a production model that clearly benefits one sector at the expense of another.

Modelling of greenhouse gas emissions from European croplands with the biogeochemical model ECOSSE

2021 ◽  
Author(s):  
Matthias Kuhnert ◽  
Michael Martin ◽  
Matthew Mcgrath ◽  
Pete Smith
Keyword(s):  
Greenhouse Gas ◽  
Large Scale ◽  
Agricultural Sector ◽  
Ghg Emissions ◽  
Production Model ◽  
Small Scale ◽  
Biogeochemical Model ◽  
Annual Data ◽  
System Variable ◽  
Nitrogen Emissions

<p>Greenhouse gas (GHG) emissions contribute to climate change. Agricultural production contributes 10 – 14 % of the global anthropogenic GHG emission, including 37 % from soils (Paustian et al., 2016). Monitoring and analysis of emissions from agriculture is the basis for reducing GHG emissions and applying mitigation options. Measuring and estimating emissions from the agricultural sector are challenging and modelling is a useful tool to capture the heterogeneity of the dynamics. Agricultural management is the main driver for the carbon and nitrogen dynamics in croplands, which makes model approaches difficult, as potentially there is great heterogeneity in the influencing factors, but also a lack of robust data for management data for larger scales. Additionally, measurements of GHG emissions are scarce, on small (spatial and temporal) scales, or do not reflect the entire range of system variable combinations. This hinders the evaluation of large scale simulation results. The objective of the study was to simulate the GHG emissions (CO<sub>2</sub> and N<sub>2</sub>O) for European croplands and use national inventory data for the evaluation of the results. We used the model ECOSSE which is based on the carbon model RothC and the nitrogen model SUNDIAL. For yield production, the primary production model MIAMI is coupled with ECOSSE. The model structure allows small scale differences (resolution for simulation is 0.1°) to be captured, while simulating monthly time steps. This balances the uncertainty of the available input data with the accuracy of the simulated results. The model shows reasonable results for the CO<sub>2</sub> emissions, but underestimates heterotrophic respiration, which leads to an overestimation of carbon fluxes to the soil. Nitrogen emissions are underestimated due to underestimation of fertilizer applications in some hot spots. The comparison with national inventories that depend mainly on statistics using simpler approaches shows differences to the simulation approach, which indicates the strong dependency of the emissions on the management data. The model approach provides the spatial distribution of the emissions as well as inter-annual dynamics. The changes on the model showed already the improved performances by the model and the extension to include more target variables. More sub-national and sub-annual data sets for evaluation will allow a further improvement of the model performance. </p>

Flying under the Radar

2011 ◽  
pp. 81-94
Author(s):  
Gill Kirkup
Keyword(s):  
Learning Environments ◽  
Large Scale ◽  
Education Programme ◽  
Content Management ◽  
University Education ◽  
Production Model ◽  
Small Scale ◽  
E Learning ◽  
Content Management Systems

This chapter argues that e-learning innovation is best done in an environment that allows for small scale experimentation and development and that this can be made more difficult in an environment that prioritises large scale e-learning systems (i.e., virtual learning environments and content management systems). These larger systems tend to function more as systems for the control and regulation of knowledge production and management, as well as being very resource hungry. The chapter discusses e-learning activities in the Open University (UK), in particular those of the MA in Online and Distance Education programme in the Institute of Educational Technology. This is a case study of e-learning innovation in what has been described as an industrial production model of university education.

Analysis of a Large Scale Liquid Hydrogen Dispersion Using the Multi-Phase Hydrodynamics Analysis Code (CHAMPAGNE)

2002 ◽  
Vol 124 (4) ◽  
pp. 283-289 ◽  
Author(s):  
K. Chitose ◽  
M. Okamoto ◽  
K. Takeno ◽  
K. Hayashi ◽  
M. Hishida
Keyword(s):  
Large Scale ◽  
Clean Energy ◽  
Liquid Hydrogen ◽  
Calculation Model ◽  
Small Scale ◽  
Simulation Code ◽  
Large Tank ◽  
Basic Functions ◽  
Multi Phase ◽  
And Storage

It is planned to use hydrogen extensively as a source of clean energy in the new century. As part of our investigation for an International Clean Energy Network Using Hydrogen Conversion (WE-NET), we have been studying to establish a safety scheme to ensure that both existing and new hydrogen technologies are implemented without endangering public safety. In this plan, we consider the transport and storage of a large quantity of hydrogen in a large tank. First we must evaluate the consequence of the postulated accident of liquid hydrogen. Since we have developed the multi-phase hydrodynamics analysis code (CHAMPAGNE), we apply the code to simulate the formation and dispersion of hydrogen vapor clouds. In the present paper we have improved the calculation model in two ways. We added a function to CHAMPAGNE for solving evaporation phenomena realistically, made many parametric calculations and planned the small-scale hydrogen dispersion experiments for the validation of this model. Another improvement is the turbulent mixing of evaporated liquid hydrogen. Now we have completed the basic functions of our simulation code. And these models of CHAMPANGE code must be verified by the experimental data.

Motivations and Deterrents to Educational Use of “Intelligent Videodisc” Systems

1979 ◽  
Vol 7 (4) ◽  
pp. 303-335 ◽  
Author(s):  
Lester F. Eastwood
Keyword(s):  
Delivery System ◽  
Large Scale ◽  
Driving Forces ◽  
New Technology ◽  
Instructional Delivery ◽  
Small Scale ◽  
Innovation In Education ◽  
Barriers To Use ◽  
Audio Video ◽  
First Time

The “intelligent videodisc” — a combination of advanced microprocessor, display, and storage technology — holds the potential for developing into a powerful instructional delivery system. In an inexpensive package, it could combine advanced computer-aided instruction (CAI) software power and display capability for audio, video, and textual programming. Attractive technically though it is, this system's real contribution will be that CAI will fit the institutional structure of education for the first time. In contrast to existing, large-scale CAI systems, this small-scale device could be purchased locally, e.g., by one teacher or administrator. Another unique attribute of this technology is its potential attractiveness to consumers. Acceptance in the home may speed acceptance in schools. Despite these unique characteristics, this new technology will face some of the same traditional barriers to innovation in education that have doomed other systems. It is likely that many teachers will retain their unwillingness to innovate using technology. Tight budgets will remain because of shrinking student populations and voter apathy. High costs might restrict software availability. This paper investigates these and other driving forces and barriers to use of the “intelligent videodisc” as a personal instructional delivery system. The paper can serve as a platform for a discussion of needs and opportunities for a Federal role in promoting educational utilization of this system.

scholarly journals Agrivoltaics: A Climate-Smart Agriculture Approach for Indian Farmers

Land ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1277
Author(s):  
Rakeshkumar Mahto ◽  
Deepak Sharma ◽  
Reshma John ◽  
Chandrasekhar Putcha
Keyword(s):  
Water Conservation ◽  
Energy Production ◽  
Large Scale ◽  
Swot Analysis ◽  
Production Capacity ◽  
Clean Energy ◽  
Economic Stability ◽  
Smart Agriculture ◽  
Sustainable Income ◽  
Commit Suicide

India is a leader when it comes to agriculture. A significant part of the country’s population depends on agriculture for livelihood. However, many of them face challenges due to using unreliable farming techniques. Sometimes the challenges increase to the extent that they commit suicide. Besides, India is highly populated, and its population is steadily increasing, requiring its government to grow its GDP and increase its energy supply proportionately. This paper reviews integrating solar farming with agriculture, known as Agrivoltaics, as a Climate-Smart Agriculture (CSA) option for Indian farmers. This study is further supported by the Strength, Weaknesses, Opportunities, and Threats (SWOT) analysis of agrivoltaics. Using the SWOT analysis, this article presents how agrivoltaics can make agriculture sustainable and reliable. This paper identifies rural electrification, water conservation, yield improvement, sustainable income generation, and reduction in the usage of pesticides as the strengths of agrivoltaics. Similarly, the paper presents weaknesses, opportunities, and threats to agrivoltaics in India. The research concludes with the findings that agrivoltaics have the potential of meeting multiple objectives such as meeting global commitments, offering employment, providing economic stability, increasing clean energy production capacity, conserving natural resources, and succeeding in several others. The paper also includes a discussion about the findings, suggestions, and implications of adopting agrivoltaics on a large scale in India.

Sign in / Sign up

Export Citation Format

Share Document