Guest Editorial by Gilles Rodriguez

2021 ◽  
Author(s):  
Gilles Rodriguez
Keyword(s):  
Energy Demand ◽  
Nuclear Energy ◽  
Guest Editorial ◽  
Production Systems ◽  
Production Capacity ◽  
Strong Increase ◽  
Mutual Aid ◽  
Health Crisis ◽  
Radiation Science ◽  
Asme Journal

Abstract It is an honour and a pleasure to wish to all actors of the ASME Journal of Nuclear Engineering and Radiation Science (Chair, Editors, Authors, Readers, and Reviewers) my New Year's greetings. This 2022 year must be seen towards an exit of the COVID-19 pandemic situation, looking for better perspectives. We must capitalize on the best of this period and on the way out of the health crisis. Even in this extremely difficult context, the links still existed. They were even been strengthened by showing more solidarity, support and mutual aid. We must keep these qualities within our scientific community, because we must now face a new decisive challenge: responding to a very strong increase in carbon-free energy demand. In order to meet this challenge, nuclear energy has a major role to play among all other non-CO2 emitting sources of energy. Its great flexibility and massive production capacity makes it a perfect complement to renewable production systems.

A New Procedure of Production Orders Sequencing in Mixed-Model Production Systems

2014 ◽  
Vol 1036 ◽  
pp. 864-868 ◽  
Author(s):  
Marcin Zemczak ◽  
Damian Krenczyk
Keyword(s):  
Task Scheduling ◽  
Production System ◽  
Mixed Model ◽  
Production Systems ◽  
Production Capacity ◽  
Approximate Solutions ◽  
Task Sequence ◽  
Optimal Method ◽  
Sequencing Problem ◽  
Car Sequencing

The paper presents the task scheduling issue, which main aim is to establish a proper sequence of tasks, that would maximize the utilization of companys production capacity. According to the literature sources, the presented sequencing problem, denoted as CSP (Car Sequencing Problem) belongs to the NP-hard class, as has been proven by simple reduction from Hamiltonians Path problem. Optimal method of solution has not yet been found, only approximate solutions have been offered, especially from the range of evolutionary algorithms. Regardless of specific production system, while considering reception of new tasks into the system, current review of the state of the system is required in order to decide whether and when a new order can be accepted for execution. In this paper, the problem of task scheduling is limited to the specific existing mixed-model production system. The main goal is to determine the effective method of creation of task sequence. Through the use of computational algorithms, and automatic analysis of the resulting sequence, rates of production are able to be checked in a real time, and so improvements can be proposed and implemented.

Resource use and environmental impacts from Australian export lamb production: a life cycle assessment

2016 ◽  
Vol 56 (7) ◽  
pp. 1070 ◽  
Author(s):  
S. G. Wiedemann ◽  
M.-J. Yan ◽  
C. M. Murphy
Keyword(s):  
Land Use ◽  
Fresh Water ◽  
Water Use ◽  
Water Consumption ◽  
Energy Demand ◽  
Production Systems ◽  
Arable Land ◽  
Ghg Emissions ◽  
Land Occupation ◽  
Fossil Fuel Energy

This study conducted a life cycle assessment (LCA) investigating energy, land occupation, greenhouse gas (GHG) emissions, fresh water consumption and stress-weighted water use from production of export lamb in the major production regions of New South Wales, Victoria and South Australia. The study used data from regional datasets and case study farms, and applied new methods for assessing water use using detailed farm water balances and water stress weighting. Land occupation was assessed with reference to the proportion of arable and non-arable land and allocation of liveweight (LW) and greasy wool was handled using a protein mass method. Fossil fuel energy demand ranged from 2.5 to 7.0 MJ/kg LW, fresh water consumption from 58.1 to 238.9 L/kg LW, stress-weighted water use from 2.9 to 137.8 L H2O-e/kg LW and crop land occupation from 0.2 to 2.0 m2/kg LW. Fossil fuel energy demand was dominated by on-farm energy demand, and differed between regions and datasets in response to production intensity and the use of purchased inputs such as fertiliser. Regional fresh water consumption was dominated by irrigation water use and losses from farm water supply, with smaller contributions from livestock drinking water. GHG emissions ranged from 6.1 to 7.3 kg CO2-e/kg LW and additional removals or emissions from land use (due to cultivation and fertilisation) and direct land-use change (due to deforestation over previous 20 years) were found to be modest, contributing between –1.6 and 0.3 kg CO2-e/kg LW for different scenarios assessing soil carbon flux. Excluding land use and direct land-use change, enteric CH4 contributed 83–89% of emissions, suggesting that emissions intensity can be reduced by focussing on flock production efficiency. Resource use and emissions were similar for export lamb production in the major production states of Australia, and GHG emissions were similar to other major global lamb producers. The results show impacts from lamb production on competitive resources to be low, as lamb production systems predominantly utilised non-arable land unsuited to alternative food production systems that rely on crop production, and water from regions with low water stress.

scholarly journals S/E ≥ 1: A semiotic understanding of bioengineering

2001 ◽  
Vol 29 (1) ◽  
pp. 277-291
Author(s):  
Jesper Hoffmeyer
Keyword(s):  
Production System ◽  
Industrial Revolution ◽  
Production Systems ◽  
Control Function ◽  
Environmental Crisis ◽  
Strong Increase ◽  
Human Needs ◽  
Energy Flows ◽  
S Factor ◽  
Technological Means

Natural (non-cultivated) systems are nmed to economize their use of energy as much as possible, and thereby to produce minimal amounts of entropy. It is suggested that this has been obtained by optimizing the evolutionary creation of semiotic controls on all processes of life. As long as biological (ultimately photosynthetic) energy sources satisfied most human needs for energy consumption, these biosemiotic controls remained largely undisturbed, with the result that production systems remained sustainable. The industrial revolution instantiated a ruphure of this balanced situation. The semiotic control function (S) would no longer match the size of the energy flow (E). In the industrial production system, energy flows have dramatically been increased, while the S component has not been taken care of. This has created a dangerously low S/E ratio, and it is suggested that this low S/E ratio constitutes a fundamental explanation of the environmental crisis. In order to restore a sustainable production system, we will now have to develop technological means for a strong increase in the S factor of the production system. It is suggested that this can be obtained through a development of considerate, gentle, and clever forms of biosemiotic technology.

Analysis of Energy System in South Africa Using Exponential Smoothing Approach and Regression Technique

2016 ◽  
Vol 5 (3) ◽  
pp. 51-67
Author(s):  
Mohammad Mehdi Ghiasi ◽  
Alireza Aslani ◽  
Younes Noorollahi
Keyword(s):  
South Africa ◽  
Growth Rate ◽  
Energy Demand ◽  
Nuclear Energy ◽  
Fossil Fuels ◽  
Energy System ◽  
Primary Energy ◽  
Exponential Smoothing ◽  
Industrial Growth ◽  
Simple Exponential Smoothing

The energy demand has increased dramatically in the recent decades. Due to the limitations and environmental effects of fossil fuels, secure level of energy supply is vital for economic and social development. This work is to review the energy sector in South Africa. After that, the consumptions of coal, oil, natural gas, and nuclear energy are estimated by employing simple exponential smoothing methodology. Finding shows that the primary energy consumption in the South Africa is correlated as a function of population growth rate, industrial growth rate, and GDP.

Assessment of Production Capacity and Ability of Rapid Response to Changing Customer Expectations

2015 ◽  
Vol 809-810 ◽  
pp. 1378-1383
Author(s):  
Iwona Paprocka ◽  
Sonia Cyba
Keyword(s):  
Production Systems ◽  
Production Capacity ◽  
Business Environment ◽  
Rapid Response ◽  
Interarrival Time ◽  
Company Size ◽  
Customer Expectations ◽  
New Concepts ◽  
A Company ◽  
Operating Company

Companies must respond quickly to customer needs and ensure the desired quality and low price in order to remain competitive in a market. It becomes necessary to create new concepts of production systems that meet all requirements imposed by consumers. The increase of reliability of machines and equipment, staff competence and forecasting a size and subject of demand increase the ability to react quickly to changes in the business environment. Therefore, the objective of this paper is to estimate the agility characteristics of a company (size of demand, interarrival time of orders and reliability of machines) and to verify its production capacity and rapid response capabilities. The characteristics are estimated for three variants of the production system: self-operating company, companies operating in cooperation, company buying additional machine.

scholarly journals Rooppur Nuclear Power Plant: Current Status & Feasibility

2018 ◽  
Vol 68 (3) ◽  
pp. 167-182 ◽  
Author(s):  
Saha Sabhasachi ◽  
Roy Koushik ◽  
Roy Souvik ◽  
Rahman Md. Asfakur ◽  
Hasan Md. Zahid
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Energy Demand ◽  
Nuclear Power ◽  
Nuclear Energy ◽  
Energy Generation ◽  
Current Status ◽  
Location Selection ◽  
Generation Plant ◽  
Short Time

AbstractIn the present world, nuclear energy is a must need for various purposes. The main cause of nuclear energy is because of the increasing energy demand, which is not possible to provide by using convenient energy generation. Bangladesh is a lower income country and the energy sector is not so developed here though there is a very high demand for energy. Rooppur Nuclear Power Plant is the only one nuclear generation plant which can provide this kind of huge energy within a very short time. This paper mainly depicts the ins and outs of this plant and discusses it’s feasibility in Bangladesh. It also focuses on the worlds various power generation methods and comprises it with nuclear energy generation. A detailed technical brief is presented in this paper along with advantages, location selection, financial and environmental impacts. This will help researchers to do further researches about nuclear energy in Bangladesh.

scholarly journals Myth v. Fact

2011 ◽  
Vol 133 (01) ◽  
pp. 24-29 ◽  
Author(s):  
John Reilly ◽  
Allison Crimmins
Keyword(s):  
Energy Demand ◽  
Alternative Energy ◽  
Nuclear Energy ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Primary Energy ◽  
Electricity Production ◽  
Energy Prices ◽  
Primary Energy Demand ◽  
Business As Usual

This article predicts future global energy demand under a business-as-usual scenario. According to the MIT projections, conventional technology supported by fossil fuels will continue to dominate under a business-as-usual scenario. In fact, in the absence of climate policies that would impact energy prices, fossil fuels will supply nearly 80% of global primary energy demand in 2100. Alternative energy technologies will expand rapidly. Non-fossil fuel use will grow from 13% to 20% by 2100, with renewable electricity production expanding nearly tenfold and nuclear energy increasing by a factor of 8.5. However, those sources currently provide such a small share of the world's energy that even rapid growth is not enough to significantly displace fossil fuels. In spite of the growth in renewables, the projections indicate that coal will remain among the least expensive fuel sources. Non-fossil fuel alternatives, such as renewable energy and nuclear energy, will be between 40% and 80% more expensive than coal.

scholarly journals PSV-30 A nutritional survey of commercially available grass-finished beef

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 341-342
Author(s):  
Jason Rowntree ◽  
Sara Bronkema ◽  
Raghav Jain ◽  
Jeannine Schweihofer ◽  
Chad Bitler ◽  
...  
Keyword(s):  
Production Systems ◽  
Production Capacity ◽  
The United States ◽  
Nutritional Composition ◽  
Gas Chromatography Mass Spectrometry ◽  
Omega 3 ◽  
Forage Crops ◽  
Carotene Content ◽  
Finishing Diets ◽  
The Impact

Abstract Consumer interest in the source of their food, its environmental footprint, and the impact of diet on health has supported the growth of the grass-finished beef (GFB) industry. Studies have concluded that GFB has distinct nutritional differences from conventionally-finished beef. As the GFB industry continues to expand, it is vital to continue to explore the nutritional complexities and variation in the product. To achieve this, a survey of grass-finishing production systems throughout the United States was conducted, and beef finished on the participating farms was analyzed for its nutritional composition, including fatty acid (FA), mineral and fat-soluble vitamin contents. Samples were analyzed from 12 producers and annual production capacity of farms ranged from 25 to 5,000 cattle, with a mean age of cattle at harvest of 26.8 ± 2.30 mo. An array of finishing diets included grazing exclusively in perennial pasture, incorporating annual forage crops, and feeding a variety of harvested forages with supplementation of non-starch feed byproducts. Beef muscle tissue FA content was analyzed by gas chromatography-mass spectrometry (GC–MS). The mean ratio of omega-6 (n-6) to omega-3 (n-3) FA in samples varied significantly by producer, ranging from 1.80 to 28.3 (P < 0.0001), with an overall sample set median of 4.10. A selection of minerals including iron, magnesium, and potassium were analyzed by ICP emission spectroscopy and mineral content significantly differed by producer for all minerals (P < 0.001). Mean α-tocopherol and β-carotene content was 610.6 μg/100 g beef and 32.2 μg/100 g, respectively. The amount of these antioxidants also varied between producers (P < 0.0001), but tended to be greater in beef finished solely on fresh forages. This survey indicates that commercially available GFB can vary in nutritional composition due to the diverse practices used to grass-finish cattle.

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