89 research outputs found
Neutrality, Nature, and Intergenerational Justice
Suppose the present generation leaves future ones with a world depleted of all the natural resources required for many valuable human pursuits. Has the present generation acted unjustly? According to contemporary theories of liberal egalitarian intragenerational and intergenerational justice, the answer, it appears, is no. The explanation for this verdict lies in the liberal commitment to remaining neutral between different ways of life: many value-laden environ- mental sites and species are not an all-purpose means to any reasonable human end and so their existence is not directly relevant in an assessment of whether justice obtains. Against this view, I argue that a commitment to neutrality and its underlying justification – the idea that individuals should be equipped to live lives of their own design – in fact supports the opposite conclusion. If justice requires that citizens can pursue whatever way of life they do or might value, then it will also demand the continued existence of the natural resources necessary for those pursuits
Waste Disposal at Whiting Farm: Recommendations for Current Waste Removal and Future Recycling Systems
The goal of this report is to provide Whiting Farm in Auburn, Maine with an analysis of options and resources that will help the farm to make informed decisions for the removal and disposal of both existing and future waste, with a specific focus on recycling. Whiting Farm has never had an on-site waste disposal system. As a result, they have accumulated large amounts of agricultural plastic, which is stored mostly outside in three forested areas around the farm. Dealing with this waste is key in implementing the farm’s goals of environmental and economic sustainability, as well as functioning as an educational model for youth and other farmers. In collaboration with Kim Finnerty, Whiting Farm’s Manager, we have created this resource to inform waste removal and the development of a recycling system in order to mitigate future waste buildup.
We first compare different options, given commercial infrastructure, for both the removal and disposal of the existing waste. We considered factors such as cost, environmental effects, and feasibility. We conclude that working with Casella Waste Management will be instrumental towards achieving these goals given Casella’s convenience, dumpster rental and waste disposal rates, and recycling capacity. We also discuss options for generating income by selling the metal, large machinery, and cardboard, which have also accumulated on the farm.
The information gathered in determining the best removal and disposal methods for existing waste informed our recommendations for a system to recycle future waste, both compostable and non-compostable. Given a lack of local commercial options and innovative technology in the field of agricultural recycling, recommendations for a future system were limited to suggestions regarding commercial partners, dumpster locations, and a list of Whiting Farm’s recyclable waste. Additionally, options are given for compostable waste recycling, keeping in mind the specific practices of Whiting Farm.
Our report presents these practical recommendations in the main body, but much of this research was informed and influenced by additional information compiled in Appendices. Among topics considered are rationale for removal of existing waste, barriers to recycling agricultural waste, and case studies referring to other farms’ disposal practices. Additionally, contacts for waste removal and disposal, model farms, as well as academics in the field of agricultural recycling are provided for future reference. This report aims to provide helpful and succinct recommendations for the implementation of a waste disposal system that is in line with Whiting Farm’s practical needs, vision of environmental sustainability, and educational goals
SEM and TEM for identification of capsular fibrosis and cellular behavior around breast implants – a descriptive analysis
Background
Capsular fibrosis (CF) is the most common long-term complication in implant-based breast augmentation. It is well accepted that the foreign body response (FBR) instigates the development of fibrotic disease. Our study aims to compare murine and human samples of CF and describe the cellular and extracellular matrix (ECM) composition using scanning and transmission electron microscopy (SEM and TEM).
Results
Miniature microtextured silicone breast implants were implanted in mice and subsequently harvested at days 15, 30, and 90 post-operation. Isolated human capsules with the most aggravated form of CF (Baker IV) were harvested post-operation. Both were analyzed with SEM and TEM to assess cellular infiltration and ECM structure.
An architectural shift of collagen fiber arrangement from unidirectional to multidirectional was observed at day 90 when compared to days 15 and 30. Fibrosis was observed with an increase of histiocytic infiltration. Moreover, bacterial accumulation was seen around silicone fragments. These findings were common in both murine and human capsules.
Conclusions
This murine model accurately recapitulates CF found in humans and can be utilized for future research on cellular invasion in capsular fibrosis. This descriptive study helps to gain a better understanding of cellular mechanisms involved in the FBR. Increases of ECM and cellularity were observed over time with SEM and TEM analysis
Growing a Sustainable Biofuels Industry: Economics, Environmental Considerations, and the Role of the Conservation Reserve Program
Biofuels are expected to be a major contributor to renewable energy in the coming decades under the Renewable Fuel Standard (RFS). These fuels have many attractive properties including the promotion of energy independence, rural development, and the reduction of national carbon emissions. However, several unresolved environmental and economic concerns remain. Environmentally, much of the biomass is expected to come from agricultural expansion and/or intensification, which may greatly affect the net environmental impact, and economically, the lack of a developed infrastructure and bottlenecks along the supply chain may affect the industry\u27s economic vitality. The approximately 30 million acres (12 million hectares) under the Conservation Reserve Program (CRP) represent one land base for possible expansion. Here, we examine the potential role of the CRP in biofuels industry development, by (1) assessing the range of environmental effects on six end points of concern, and (2) simulating differences in potential industry growth nationally using a systems dynamics model. The model examines seven land-use scenarios (various percentages of CRP cultivation for biofuel) and five economic scenarios (subsidy schemes) to explore the benefits of using the CRP. The environmental assessment revealed wide variation in potential impacts. Lignocellulosic feedstocks had the greatest potential to improve the environmental condition relative to row crops, but the most plausible impacts were considered to be neutral or slightly negative. Model simulations revealed that industry growth was much more sensitive to economic scenarios than land-use scenarios—similar volumes of biofuels could be produced with no CRP as with 100% utilization. The range of responses to economic policy was substantial, including long-term market stagnation at current levels of first-generation biofuels under minimal policy intervention, or RFS-scale quantities of biofuels if policy or market conditions were more favorable. In total, the combination of the environmental assessment and the supply chain model suggests that large-scale conversion of the CRP to row crops would likely incur a significant environmental cost, without a concomitant benefit in terms of biofuel production
Sexuality and Affection among Elderly German Men and Women in Long-Term Relationships: Results of a Prospective Population-Based Study
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.The study was funded by the German Federal Ministry for Families, Senior Citizens, Women and Youth (AZ 314-1722-102/16; AZ 301-1720-295/2), the Ministry for Science, Research and Art Baden-Württemberg, and the University of Rostock (FORUN 989020; 889048)
Alignment to the Actions of a Robot
Alignment is a phenomenon observed in human conversation: Dialog partners’ behavior converges in many respects. Such alignment has been proposed to be automatic and the basis for communicating successfully. Recent research on human–computer dialog promotes a mediated communicative design account of alignment according to which the extent of alignment is influenced by interlocutors’ beliefs about each other. Our work aims at adding to these findings in two ways. (a) Our work investigates alignment of manual actions, instead of lexical choice. (b) Participants interact with the iCub humanoid robot, instead of an artificial computer dialog system. Our results confirm that alignment also takes place in the domain of actions. We were not able to replicate the results of the original study in general in this setting, but in accordance with its findings, participants with a high questionnaire score for emotional stability and participants who are familiar with robots align their actions more to a robot they believe to be basic than to one they believe to be advanced. Regarding alignment over the course of an interaction, the extent of alignment seems to remain constant, when participants believe the robot to be advanced, but it increases over time, when participants believe the robot to be a basic version
L-arginine Supplementation Improves Responses to Injury and Inflammation in Dextran Sulfate Sodium Colitis
Inflammatory bowel disease (IBD), consisting of Crohn's disease and ulcerative colitis (UC), results in substantial morbidity and is difficult to treat. New strategies for adjunct therapies are needed. One candidate is the semi-essential amino acid, L-arginine (L-Arg), a complementary medicine purported to be an enhancer of immunity and vitality in the lay media. Using dextran sulfate sodium (DSS) as a murine colonic injury and repair model with similarities to human UC, we assessed the effect of L-Arg, as DSS induced increases in colonic expression of the y+ cationic amino acid transporter 2 (CAT2) and L-Arg uptake. L-Arg supplementation improved the clinical parameters of survival, body weight loss, and colon weight, and reduced colonic permeability and the number of myeloperoxidase-positive neutrophils in DSS colitis. Luminex-based multi-analyte profiling demonstrated that there was a marked reduction in proinflammatory cytokine and chemokine expression with L-Arg treatment. Genomic analysis by microarray demonstrated that DSS-treated mice supplemented with L-Arg clustered more closely with mice not exposed to DSS than to those receiving DSS alone, and revealed that multiple genes that were upregulated or downregulated with DSS alone exhibited normalization of expression with L-Arg supplementation. Additionally, L-Arg treatment of mice with DSS colitis resulted in increased ex vivo migration of colonic epithelial cells, suggestive of increased capacity for wound repair. Because CAT2 induction was sustained during L-Arg treatment and inducible nitric oxide (NO) synthase (iNOS) requires uptake of L-Arg for generation of NO, we tested the effect of L-Arg in iNOS−/− mice and found that its benefits in DSS colitis were eliminated. These preclinical studies indicate that L-Arg supplementation could be a potential therapy for IBD, and that one mechanism of action may be functional enhancement of iNOS activity
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