scholarly journals A production-recycling-reuse model for plastic beverages bottles

2021 ◽  
Author(s):  
Nouri Dawood Matar
Keyword(s):  
Market Price ◽  
Environmental Damage ◽  
Low Grade ◽  
Total System ◽  
Pet Bottles ◽  
Alternative Materials ◽  
Present Worth ◽  
Polyethylene Terephthalate Bottles ◽  
The Cost ◽  
Varying Demand

In this thesis a recycling-reuse model is developed and analyzed. Discarded 2L plastic PET (polyethylene terephthalate) bottles are collected from the market. The non-contaminated PET bottles are either remanufactured or used as regrind mixed with virgin PET to produce new bottles to satisfy varying demand. Contaminated bottles are sold to industries using low grade plastic and only badly contaminated bottles go to landfill. Cost of land use and associated environmental damage is calculated as a present worth and charged to the manufacture. Analyses conducted on this model found that the amount of bottles collected had the largest influence on the outcome of the total system unit time cost. Alternative materials to PET that degrade faster are surveyed and used to demonstrate significant reduction in the cost of landfill disposal. Analysis using a minimal market price for remanufactured and newly produced bottles resulted in profit.

scholarly journals A production-recycling-reuse model for plastic beverages bottles

2021 ◽  
Author(s):  
Nouri Dawood Matar
Keyword(s):  
Market Price ◽  
Environmental Damage ◽  
Low Grade ◽  
Total System ◽  
Pet Bottles ◽  
Alternative Materials ◽  
Present Worth ◽  
Polyethylene Terephthalate Bottles ◽  
The Cost ◽  
Varying Demand

In this thesis a recycling-reuse model is developed and analyzed. Discarded 2L plastic PET (polyethylene terephthalate) bottles are collected from the market. The non-contaminated PET bottles are either remanufactured or used as regrind mixed with virgin PET to produce new bottles to satisfy varying demand. Contaminated bottles are sold to industries using low grade plastic and only badly contaminated bottles go to landfill. Cost of land use and associated environmental damage is calculated as a present worth and charged to the manufacture. Analyses conducted on this model found that the amount of bottles collected had the largest influence on the outcome of the total system unit time cost. Alternative materials to PET that degrade faster are surveyed and used to demonstrate significant reduction in the cost of landfill disposal. Analysis using a minimal market price for remanufactured and newly produced bottles resulted in profit.

A reverse logistics inventory model for plastic bottles

2014 ◽  
Vol 25 (2) ◽  
pp. 315-333 ◽  
Author(s):  
Nouri Matar ◽  
Mohamad Y. Jaber ◽  
Cory Searcy
Keyword(s):  
Environmental Damage ◽  
Low Grade ◽  
Total System ◽  
Content Type ◽  
Pet Bottles ◽  
Manual Tasks ◽  
The Cost ◽  
Contaminated Streams ◽  
Future Work ◽  
Varying Demand

Purpose – The purpose of this paper is to present an original model for the production-recycling-reuse of plastic beverage bottles. Design/methodology/approach – It is assumed that discarded two-liter plastic polyethylene terephthalate (PET) bottles are collected from the market. The bottles are then sorted into non-contaminated and contaminated streams. The non-contaminated PET bottles are either remanufactured or used as regrind mixed with virgin PET to produce new bottles to satisfy varying demand. The contaminated bottles are either sold to industries using low-grade plastic or disposed of in a landfill. Numerical studies are used to illustrate the behaviour of the model, with an emphasis on exploring the reduction of total system cost and the amount of bottles going into a landfill. Findings – Numerical analyses conducted on the model found that the amount of bottles collected had the largest influence on the outcome of the total system unit time cost. Alternative materials to PET are surveyed and used to demonstrate a significant reduction in the cost of landfill disposal due to their more rapid degradation in the landfill. Research limitations/implications – Several areas for future work are highlighted. Potential modifications to the model could focus on accommodating bottles made of material other than plastic, incorporating the effects of learning on manual tasks, and on accommodating shortages or excess inventory. Originality/value – The model incorporates several unique aspects, including accounting for the cost of land use and associated environmental damage through the calculation of a present value that is charged to the manufacturer.

scholarly journals Enhanced Thermoelectric Performance of n-Type Bi2Se3 Nanosheets through Sn Doping

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1827
Author(s):  
Mengyao Li ◽  
Yu Zhang ◽  
Ting Zhang ◽  
Yong Zuo ◽  
Ke Xiao ◽  
...  
Keyword(s):  
Figure Of Merit ◽  
Cost Effective ◽  
Low Grade ◽  
Hot Press ◽  
Processing Technologies ◽  
Sn Doping ◽  
Practical Applications ◽  
Alternative Materials ◽  
The Cost ◽  
Low Grade Heat

The cost-effective conversion of low-grade heat into electricity using thermoelectric devices requires developing alternative materials and material processing technologies able to reduce the currently high device manufacturing costs. In this direction, thermoelectric materials that do not rely on rare or toxic elements such as tellurium or lead need to be produced using high-throughput technologies not involving high temperatures and long processes. Bi2Se3 is an obvious possible Te-free alternative to Bi2Te3 for ambient temperature thermoelectric applications, but its performance is still low for practical applications, and additional efforts toward finding proper dopants are required. Here, we report a scalable method to produce Bi2Se3 nanosheets at low synthesis temperatures. We studied the influence of different dopants on the thermoelectric properties of this material. Among the elements tested, we demonstrated that Sn doping resulted in the best performance. Sn incorporation resulted in a significant improvement to the Bi2Se3 Seebeck coefficient and a reduction in the thermal conductivity in the direction of the hot-press axis, resulting in an overall 60% improvement in the thermoelectric figure of merit of Bi2Se3.

scholarly journals Setting time of ecological bricks with different percentage PET

2018 ◽  
Vol 3 (1) ◽  
pp. 354
Author(s):  
Andrea Maldonado ◽  
Angela Corvalan ◽  
Delia Cohenca ◽  
Magna Monteiro
Keyword(s):  
Economic Efficiency ◽  
Raw Materials ◽  
Setting Time ◽  
International Standards ◽  
Environment Friendly ◽  
Pet Bottles ◽  
Alternative Materials ◽  
Set Up ◽  
Polyethylene Terephthalate Bottles ◽  
Ecological Building

Raw materials and products environment friendly has led many authors to develop the area of bio-construction, especially in civil construction, using alternative materials to obtain new achievements. PET (Polyethylene terephthalate) bottles, widely used worldwide, have made it possible to produce very ambitious technological products for their energy and economic efficiency. This study is based on the application of discarded PET bottles for application in ecological building bricks. For this, samples with different PET percent were prepared. The samples were prepared in triplicate. These samples were subjected to tests to verify the optimum setting time/PET ratio. The tests were performed according to international standards and compared to the values of conventional bricks.Keywords: Environment friendly, set-up tests, bio-construction.

PP581 Catastrophic Costs Of Multidrug-Resistant Tuberculosis: Estimation Based On The Cost Of Treatment In China

2020 ◽  
Vol 36 (S1) ◽  
pp. 43-43
Author(s):  
Lijun Shen ◽  
Shangshang Gu ◽  
Fan Zhang ◽  
Zhao Liu ◽  
Yuehua Liu
Keyword(s):  
Market Price ◽  
Multidrug Resistant ◽  
Policy Support ◽  
World Health ◽  
Chinese Patients ◽  
Resistant Tuberculosis ◽  
Multidrug Resistant Tuberculosis ◽  
Mdr Tb ◽  
Drug Affordability ◽  
The Cost

IntroductionChina bears a considerably high burden of multidrug-resistant tuberculosis (MDR-TB). Second-line anti-TB drugs are urgently needed yet domestic MDR-TB drugs are expensive and lack policy support. Patients’ living conditions are closely related to the drug affordability. The national TB prevention programs should play a critical role. The purpose of this study is to measure the cost of treating MDR-TB patients under different treatment schemes and price sources. The results of this study are expected to inform the relevant drug protection policies and provide inputs for further cost-effectiveness analyses.MethodsBased on the treatment plan of China's Multidrug-Resistant Pulmonary Tuberculosis Clinical Path (2012 edition) and the World Health Organization (WHO) Drug-Resistant Tuberculosis Treatment Guide (2018 edition), the treatment costs of MDR-TB were measured under different scenarios. Catastrophic health expenditure was then calculated if the treatment cost exceeds 40 percent of the household's non-subsistence income. National, rural and disposable income per capita in 2018, were used to represent Chinese patients’ affordability.ResultsUnder varied treatment schemes and market price sources in China, the total costs for MDR-TB patients range from 19,401 to 126,703 CNY [2,853 to 18,633 USD] per person. Under current prices, all treatment schemes recommended by the WHO will incur catastrophic costs for Chinese MDR-TB patients. Significant differences were found between rural and urban areas as 52.8 percent of the treatment listed in the 2012 China Guideline would lead to catastrophic cost for rural patients but not urban ones.ConclusionsOur study concludes that the domestic drugs are more expensive than the international purchase price and the treatment of MDR-TB imposes substantial economic burden on patients, especially in the rural areas. The results of the study also indicate that it is urgent for the state to emphasize government responsibility and initiate centralized procurement for price negotiations to reduce the market price of MDR-TB drugs. The urban-rural gap should also be addressed in the design of future policies to ensure the drug affordability for all patients in need.

scholarly journals Backward-forward linear-quadratic mean-field Stackelberg games

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Kehan Si ◽  
Zhen Wu
Keyword(s):  
Large Population ◽  
Consistency Condition ◽  
Market Price ◽  
Mean Field ◽  
Mapping Method ◽  
Open Loop ◽  
Stackelberg Games ◽  
Linear Quadratic ◽  
Population System ◽  
The Cost

AbstractThis paper studies a controlled backward-forward linear-quadratic-Gaussian (LQG) large population system in Stackelberg games. The leader agent is of backward state and follower agents are of forward state. The leader agent is dominating as its state enters those of follower agents. On the other hand, the state-average of all follower agents affects the cost functional of the leader agent. In reality, the leader and the followers may represent two typical types of participants involved in market price formation: the supplier and producers. This differs from standard MFG literature and is mainly due to the Stackelberg structure here. By variational analysis, the consistency condition system can be represented by some fully-coupled backward-forward stochastic differential equations (BFSDEs) with high dimensional block structure in an open-loop sense. Next, we discuss the well-posedness of such a BFSDE system by virtue of the contraction mapping method. Consequently, we obtain the decentralized strategies for the leader and follower agents which are proved to satisfy the ε-Nash equilibrium property.

scholarly journals Development of Protein Rich Flavored Bar

2021 ◽  
Vol 9 (12) ◽  
pp. 104-107
Author(s):  
Kaustav Mukherjee
Keyword(s):  
Protein Energy Malnutrition ◽  
Market Price ◽  
Value Added ◽  
Nutrient Content ◽  
Diabetic Patients ◽  
Organoleptic Evaluation ◽  
Sesame Seeds ◽  
Pumpkin Seeds ◽  
The Cost ◽  
Protein Rich

Abstract: The present study entitled “Development of protein rich flavoured bar” was conducted with the objective to develop protein rich flavoured bar using different ingredients, to assess the sensory accessibility, determine the nutritional composition and cost of developed protein bar. Protein rich flavoured bar were prepared by using three treatments i.e. T1 (dates 50g, oats 10g, flaxseeds 5g, sesame seeds 5g, pumpkin seeds 5g, peanut powder 10g, honey 5g, cocoa powder 10g), T2 (dates 45g, oats 8g, flaxseeds 5g, sesame seeds 5g, pumpkin seeds 5g, peanut powder 10g, honey 12g, guava flavour 10g) and T3 (dates 40g, oats 13g, flaxseeds 5g, sesame seeds 5g, pumpkin seeds 5g, peanut powder 10g, honey 12g, orange flavour 10g). Organoleptic evaluation of the prepared product in relation to sensory attributes was carried out using the nine point hedonic scale score card by Srilaksmi (2015). The nutrient content of the value added food products were calculated with the help of food composition table given by Gopalan et al., (2011). The cost of individual raw ingredients used in the preparation of the food product as the prevailing market price. All treatments were replicated four times and the data obtained during investigation were statistically analyzed by using analysis of variance (ANOVA) and critical difference (C.D.) techniques. On the basis of sensory acceptability it was found that T1 was scored highest in terms of colour and appearance, body and texture, flavour and taste and overall acceptability. As well as T1 shows significantly high in the nutritive value among all treatments regarding energy, protein, carbohydrates, fat, fibre, calcium and iron. The cost of the protein rich flavoured bar per 100g of dry ingredients at the prevailing cost of the raw materials was highest in T1 (Rs. 29.33) followed by T2 (Rs. 20.69) and T3 (Rs. 20.34). Dates are very good source of fibre, carbohydrate, protein and act as natural sweetener with no fat. As the bar is rich in protein, iron and other macronutrients, so it is majorly recommended for Protein-energy malnutrition (PEM), athletes and anemic patient. Daily 100g of dates intake helps to get all essential nutrients. Strictly restricted for Type-1 diabetic patients. Keywords: Protein, Nutrient content, organoleptic evaluation, nutrition bar, cost.

scholarly journals PREÇO MÍNIMO DE VENDA DA MADEIRA DE EUCALIPTO PARA OS SEGMENTOS DE CARVÃO E SERRARIA

Nativa ◽  
2018 ◽  
Vol 6 (5) ◽  
pp. 526
Author(s):  
Luis Carlos de Freitas ◽  
Wilmerson Bernardino Prado ◽  
Aline Pereira das Virgens ◽  
Danusia Silva Luz ◽  
Ana Carolina Dantas Moreira
Keyword(s):  
Market Price ◽  
Selling Price ◽  
Average Increase ◽  
Sale Price ◽  
Annual Average ◽  
Eucalyptus Wood ◽  
Project Costs ◽  
The Interest Rate ◽  
The Cost ◽  
Standing Timber

Objetivou-se neste trabalho avaliar o preço mínimo de venda de madeira de eucalipto com reflorestamentos destinados aos segmentos de carvão e serraria. O preço mínimo foi determinado através dos dados de custos e receitas dos empreendimentos. Os custos dos projetos foram descontados para o ano zero, somados e igualados a receita, também descontada para o ano zero.  A receita foi expressa pelo produto do Incremento Médio Anual, idade de corte, e preço mínimo de venda da madeira. Foram obtidos os seguintes preços mínimos de venda para madeira: carvão (R$ 38,44 para madeira em pé e R$ 55,39 para madeira empilhada); serraria (R$ 29,76 para madeira em pé e R$57,71 para madeira empilhada). Os valores encontrados foram inferiores ao preço de mercado, evidenciando que o custo de produção da madeira foi totalmente assegurado pelo seu preço de venda, proporcionando ainda um adicional de receita para cada metro cúbico comercializado. A análise de sensibilidade mostrou grande influência da taxa de juros no preço mínimo de venda da madeira, diferentemente do que foi observado para o custo anual de arrendamento da terra. Os resultados da pesquisa mostram importância ao nortear produtores florestais em relação aos preços de comercialização de produtos.Palavras-chave: planejamento econômico, projetos florestais, custo de madeira. MINIMUM SALE PRICE OF EUCALYPT TIMBER CONSIDERING REFORESTATION TO VEGETAL COAL PRODUCTION AND SAWMILL ABSTRACT:The objective of this study was to evaluate the minimum selling price of eucalyptus wood with reforestation for the coal and sawmill segments. The minimum price was determined by the cost and revenue data of the projects. Project costs were discounted for year zero, plus and equal to revenue, also discounted for year zero. Revenue was expressed as the product of the Annual Average Increase, age of cut, and minimum selling price of the wood. The following minimum selling prices were obtained for wood: coal (R $ 38.44 for standing timber and R $ 55.39 for stacked timber); (R $ 29.76 for standing timber and R $ 57.71 for timber stacked). The values found were lower than the market price, evidencing that the cost of production of the wood was fully assured by its selling price, also providing an additional revenue for each cubic meter marketed. The sensitivity analysis showed a large influence of the interest rate on the minimum selling price of the wood, unlike what was observed for the annual cost of renting the land. The results of the survey show importance when guiding forest producers in relation to the prices of products commercialization.Keywords: economic planning, forestry projects, timber cost.

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