253 research outputs found
The economics of processing ethanol at Louisiana sugar mills: a three part economic analysis of feedstocks, risk, business strategies, and uncertainty
The development of an efficient processing infrastructure is critical for the budding cellulosic ethanol industry. Developing a diverse feedstock portfolio is one crucial part of this process which can lead towards economically feasible cellulosic ethanol production. Cellulosic ethanol production requires the production and transportation of large quantities of biomass. Sugarcane and other dense grasses offer a compelling path towards a successful biomass supply chain. The Louisiana sugar belt already has an infrastructure adapted to the task of biomass supply, and taking advantage of this is one key way that a cellulosic ethanol plant can benefit from the region’s endowment. Additionally, the area has very large and sophisticated biomass processing facilities in the form of sugar mills. Finally, production of renewable energy from biomass is an area that is filled with economic uncertainty, both from the market and from economic policy. Dealing with this uncertainty will be crucial to any firm that attempts to operate in the cellulosic ethanol industry in the foreseeable future. This study focuses on several possibilities for aiding the development of the cellulosic ethanol industry, including feedstock development and building upon and within existing agricultural infrastructure. The Louisiana sugarcane belt is the target area of the study, which concentrates on sugarcane bagasse, energy cane, and sweet sorghum as cellulosic feedstocks. This study examines several possible scenarios and feedstock combinations, finding that a combination of sugarcane bagasse, energy cane, and sweet sorghum could supply a profitable cellulosic ethanol plant situated in the Louisiana sugar belt. By collocating with a sugar mill, a cellulosic ethanol plant can gain further advantage in the form of reusing capital and other fixed costs. This collocation is found to offer substantial benefits to both the cellulosic ethanol processor and the sugar mill, offering a diversified revenue stream, which enhances both operations. Finally, by employing real options analysis to the question of uncertainty in the market, it is found that a cellulosic ethanol plant can separate feedstock decisions from production and capacity decisions in a manner that mitigates downside potential from at least some types of market and policy shocks. This is found to greatly enhance the value of the firm in cases where unpredictable negative shocks occu
The Economics of Processing Ethanol at Sugarmills: A Simulation Approach
Resource /Energy Economics and Policy,
Energy Cane Usage for Cellulosic Ethanol: Estimation of Feedstock Costs
Cellulosic Ethanol, Energy Cane, Sugarcane, Farm Management, Production Economics,
A Comparison of Pricing Strategies for Cellulosic Ethanol Processors: A Simulation Approach
Resource /Energy Economics and Policy,
Breaking into the Cellulosic Ethanol Market: Capacity and Storage Strategies
This paper examines the possibilities of breaking into the cellulosic ethanol market in south Louisiana via strategic feedstock choices and the leveraging of the area’s competitive advantages. A small plant strategy is devised whereby the first-mover problem might be solved, and several scenarios are tested using Net Present Value analysis.cellulosic ethanol, sugarcane, energy cane, sweet sorghum, bagasse, ethanol, biofuel, bioethanol, Agribusiness, Agricultural Finance, Crop Production/Industries, Production Economics, Research and Development/Tech Change/Emerging Technologies, Resource /Energy Economics and Policy,
Advanced Biofuel Production in Louisiana Sugar Mills: an Application of Real Options Analysis
In order to more fully study the risks and uncertainty involved in cellulosic ethanol production, we examine a simulated plant in South Louisiana using Real Options Analysisreal options, risk, uncertainty, cellulosic ethanol, energy cane, sorghum, bagasse, simulation, Agribusiness, Agricultural Finance, Production Economics, Resource /Energy Economics and Policy, Risk and Uncertainty, q42, q14, q16, d81, g31,
Urban football narratives and the colonial process in Lourenço Marques
Support for Portuguese football teams, in Mozambique as well as in other former
Portuguese colonies, could be interpreted either as a sign of the importance of a
cultural colonial heritage in Africa or as a symbol of a perverse and neo-colonial
acculturation. This article, focused on Maputo, the capital of Mozambique –
formerly called Lourenc¸o Marques – argues that in order to understand
contemporary social bonds, it is crucial to research the connection between the
colonial process of urbanisation and the rise of urban popular cultures. Despite
the existence of social discrimination in colonial Lourenc¸o Marques, deeply
present in the spatial organisation of a city divided between a ‘concrete’ centre
and the immense periphery, the consumption of football, as part of an emergent
popular culture, crossed segregation lines. I argue that football narratives, locally
appropriated, became the basis of daily social rituals and encounters, an element
of urban sociability and the content of increasingly larger social networks.
Therefore, the fact that a Portuguese narrative emerged as the dominant form of
popular culture is deeply connected to the growth of an urban community
The Australian Imaging, Biomarkers and Lifestyle (AIBL) Study of Aging: Methodology and Baseline Characteristics of 1112 Individuals Recruited for a Longitudinal Study of Alzheimer\u27s Disease
Background: The Australian Imaging, Biomarkers and Lifestyle (AIBL) flagship study of aging aimed to recruit 1000 individuals aged over 60 to assist with prospective research into Alzheimer\u27s disease (AD). This paper describes the recruitment of the cohort and gives information about the study methodology, baseline demography, diagnoses, medical comorbidities, medication use, and cognitive function of the participants. Methods: Volunteers underwent a screening interview, had comprehensive cognitive testing, gave 80 ml of blood, and completed health and lifestyle questionnaires. One quarter of the sample also underwent amyloid PET brain imaging with Pittsburgh compound B (PiB PET) and MRI brain imaging, and a subgroup of 10% had ActiGraph activity monitoring and body composition scanning. Results: A total of 1166 volunteers were recruited, 54 of whom were excluded from further study due to comorbid disorders which could affect cognition or because of withdrawal of consent. Participants with AD (211) had neuropsychological profiles which were consistent with AD, and were more impaired than participants with mild cognitive impairment (133) or healthy controls (768), who performed within expected norms for age on neuropsychological testing. PiB PET scans were performed on 287 participants, 100 had DEXA scans and 91 participated in ActiGraph monitoring. Conclusion: The participants comprising the AIBL cohort represent a group of highly motivated and well-characterized individuals who represent a unique resource for the study of AD. They will be reassessed at 18-month intervals in order to determine the predictive utility of various biomarkers, cognitive parameters and lifestyle factors as indicators of AD, and as predictors of future cognitive decline
Lung cancer stage-shift following a symptom awareness campaign
Background: Lung cancer outcomes in the UK are worse than in many other developed nations. Symptom awareness campaigns aim to diagnose patients at an earlier stage to improve cancer outcomes.
Methods: An early diagnosis campaign for lung cancer commenced in Leeds, UK in 2011 comprising public and primary-care facing components. Rates of community referral for chest X-ray and lung cancer stage (TNM seventh edition) at presentation were collected from 2008 to 2015. Linear trends were assessed by χ2 test for trend in proportions. Headline figures are presented for the 3 years pre-campaign (2008–2010) and the three most recent years for which data are available during the campaign (2013–2015).
Findings: Community-ordered chest X-ray rates per year increased from 18 909 in 2008–2010 to 34 194 in 2013–2015 (80.8% increase). A significant stage shift towards earlier stage lung cancer was seen (χ2(1)=32.2, p<0.0001). There was an 8.8 percentage point increase in the proportion of patients diagnosed with stage I/II lung cancer (26.5% pre-campaign vs 35.3% during campaign) and a 9.3% reduction in the absolute number of patients diagnosed with stage III/IV disease (1254 pre-campaign vs 1137 during campaign).
Interpretation: This is the largest described lung cancer stage-shift in association with a symptom awareness campaign. A causal link between the campaign and stage-shift cannot be proven but appears plausible. Limitations of the analysis include a lack of contemporary control population
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