1,177 research outputs found

    Degradation and forgone removals increase the carbon impact of intact forest loss by 626%

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    Intact tropical forests, free from substantial anthropogenic influence, store and sequester large amounts of atmospheric carbon but are currently neglected in international climate policy. We show that between 2000 and 2013, direct clearance of intact tropical forest areas accounted for 3.2% of gross carbon emissions from all deforestation across the pantropics. However, full carbon accounting requires the consideration of forgone carbon sequestration, selective logging, edge effects, and defaunation. When these factors were considered, the net carbon impact resulting from intact tropical forest loss between 2000 and 2013 increased by a factor of 6 (626%), from 0.34 (0.37 to 0.21) to 2.12 (2.85 to 1.00) petagrams of carbon (equivalent to approximately 2 years of global land use change emissions). The climate mitigation value of conserving the 549 million ha of tropical forest that remains intact is therefore significant but will soon dwindle if their rate of loss continues to accelerate

    Interface state contribution to the photovoltaic effect in organic phototransistors:Photocapacitance measurements and optical sensing

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    Made available in DSpace on 2018-12-11T16:50:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Instituto Nacional de Ciência e Tecnologia em Eletrônica OrgânicaWe report the results of an investigation into the contribution that trapping in interface states makes to the photovoltaic effect observed in organic phototransistors. To isolate this effect from other processes that occur in the transistor structure when under illumination, we focus attention on the photo-response of metal-insulator-semiconductor (MIS) capacitors - the core structure of transistors. The capacitors comprised poly(3-hexylthiophene), (P3HT), as the active semiconductor in combination with one of three insulators, namely, poly(amide-imide), (PAI), SU-8 photoresist and polysilsesquioxane (PSQ). Following initial characterization in the dark, the capacitor response was measured both during and after irradiation with light in the wavelength range 400–700 nm. Three different approaches were employed to study the photo-response, each providing a different insight into the processes occurring. Capacitance-voltage sweeps before, during and after illumination provided direct evidence supporting the view that the photovoltaic effect occurred as a result of electron trapping in interface states of density up to ∼2 × 1012 cm−2 in the P3HT/PAI combination but lower for SU-8 and PSQ. The dynamic photo-response, in which device capacitance was held constant by changing the applied bias, showed a fast component related to optically induced photoconduction in the semiconductor and a slower component reflecting the dynamics of interface electron trapping. Finally, photo-induced capacitance changes occurring with constant applied voltage were used to demonstrate a simple 3 × 3 imaging array.School of Electronic Engineering Bangor University, Dean StreetBrazilian Nanotechnology National Laboratory (LNNano) Brazilian Centre of Research in Energy and Materials (CNPEM)Department of Physics São Paulo State University (UNESP), PO Box 266Institute of Physics of São Carlos University of São Paulo (USP), PO Box 369Catarinense Federal Institute of Education Science and Technology, PO Box 21Department of Physics São Paulo State University (UNESP), PO Box 26

    Fibrillin-Rich Microfibrils are Reduced in Photoaged Skin. Distribution at the Dermal–Epidermal Junction

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    Chronic sun exposure results in photoaged skin with deep coarse wrinkles and loss of elasticity. We have examined the distribution and abundance of fibrillin-rich microfibrils, key structural components of the elastic fiber network, in photoaged and photoprotected skin. Punch biopsies taken from photoaged forearm and from photoprotected hip and upper inner arm of 16 subjects with a clinical range of photoaging were examined for fibrillin-1 and fibrillin-2 expression and microfibril distribution. In situ hybridization revealed decreased fibrillin-1 mRNA but unchanged fibrillin-2 mRNA levels in severely photoaged forearm biopsies relative to photoprotected dermal sites. An immunohistochemical approach demonstrated that microfibrils at the dermal–epidermal junction were significantly reduced in moderate to severely photoaged forearm skin. Confocal microscopy revealed that the papillary dermal microfibrillar network was truncated and depleted in photoaged skin. These studies highlight that the fibrillin-rich microfibrillar network associated with the upper dermis undergoes extensive remodeling following solar irradiation. These changes may contribute to the clinical features of photoaging, such as wrinkle formation and loss of elasticity

    Understanding patient and family utilisation of community-based palliative care services out-of-hours: Additional analysis of systematic review evidence using narrative synthesis

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    BackgroundCommunity-based out-of-hours services are an integral component of end-of-life care. However, there is little understanding of how patients and families utilise these services. This additional analysis of a systematic review aims to understand and identify patterns of out-of-hours service use and produce recommendations for future service design.MethodData on service use was extracted and secondary analysis undertaken, from a systematic review of models of community out-of-hours services. Narrative synthesis was completed, addressing four specific aspects of service use: 1.Times when patients/families/healthcare professionals need to contact out-of-hours services; 2. Who contacts out-of-hours services; 3. Whether a telephone call, centre visit or home visit is provided; 4. Who responds to out-of-hours calls.ResultsCommunity-based out-of-hours palliative care services were most often accessed between 5pm and midnight, especially on weekdays (with reports of 69% of all calls being made out-of-hours). Family members and carers were the most frequent callers to of the services (making between 60% and 80% of all calls). The type of contact (telephone, centre visit or home visit) varied based on what was offered and on patient need. Over half of services were led by a single discipline (nurse).ConclusionsOut-of-hours services are highly used up to midnight, and particularly by patients’ family and carers. Recommendations to commissioners and service providers are to:• Increase provision of out-of-hours services between 5pm and midnight to reflect the increased use at these times.• Ensure that family and carers are provided with clear contact details for out-of-hours support.• Ensure patient records can be easily accessed by health professionals responding to calls, making the triage process easier.• Listen to patients, family and carers in the design of out-of-hours services, including telephone services.• Collect data systematically on out-of-hours-service use and on outcomes for patients who use the service

    Severely Photosensitive Psoriasis: A Phenotypically Defined Patient Subset

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    A subset of patients with chronic plaque psoriasis exhibits severely photosensitive psoriasis (PP) with a pronounced seasonal pattern, but the pathomechanism is not understood. We performed two related studies; first, a detailed clinical characterization of PP, and second, a controlled investigation exploring the underlying pathomechanisms through the assessment of disease onset after photoprovocation. Patients with PP (n=20) showed striking female predominance (19F:1M), very low mean age of psoriasis onset (11 years, range 2–24), family history of psoriasis (13/20), a strong HLA–Cw*0602 association (16/17), and a rapid abnormal clinical response to broadband UVA, comprising erythema±scaling plaques (17/20). Subsequently, patients with PP (n=10), non-PP (n=9), and healthy volunteers (n=11) were challenged with low-dose broadband UVA on 3 consecutive days, and serial biopsies were taken after 6hours to 7 days and from unchallenged skin. Histological changes consistent with early psoriasis occurred in 4 of 10 PP patients, but in neither of the control groups, with significant dermal infiltration by neutrophils, CD4+, CD8+, and CD45RO+ cells at 24h, accompanied by acanthosis. Thus, a phenotypically distinct subset of psoriasis has been characterized. In contrast with earlier assumptions, UV can provoke psoriasiform features rapidly de novo; a role for memory effector T cells is supported in the early phase

    Applying Ecosystem Services Approaches for Biodiversity Conservation: Benefits and Challenges

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    Ecosystem services as a concept and framework for understanding the way in which nature benefits people has led to a suite of approaches that are increasingly being used to support sustainable management of biodiversity and ecosystems. However, the utility of the ecosystem services framework and associated tools for supporting biodiversity conservation are the subject of ongoing debates among conservationists. In this paper, we discuss several general ways in which ecosystem services approaches are supporting biodiversity conservation, which may not have been possible otherwise. The new opportunities that ecosystem services approaches provide for biodiversity conservation include: the development of broader constituencies for conservation and expanded possibilities to influence decision-making; opportunities to add or create new value to protected areas; and the opportunities to manage ecosystems sustainably outside of protected areas. We also review areas in which ecosystem services approaches may not effectively conserve certain aspects of biodiversity. Areas of particular concern in this regard include: species without utilitarian or economic value; ecological processes that do not directly benefit people; and critical ecological functions that may be undermined in attempts to optimize a target service. Understanding the benefits and limitations of using ecosystem services approaches for achieving biodiversity conservation will help ensure that the finite resources available for biodiversity conservation and sustainable development are used as strategically and effectively as possible to maintain the multiple components of biodiversity and to support human well-being

    Applying Ecosystem Services Approaches for Biodiversity Conservation: Benefits and Challenges

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    Ecosystem services as a concept and framework for understanding the way in which nature benefits people has led to a suite of approaches that are increasingly being used to support sustainable management of biodiversity and ecosystems. However, the utility of the ecosystem services framework and associated tools for supporting biodiversity conservation are the subject of ongoing debates among conservationists. In this paper, we discuss several general ways in which ecosystem services approaches are supporting biodiversity conservation, which may not have been possible otherwise. The new opportunities that ecosystem services approaches provide for biodiversity conservation include: the development of broader constituencies for conservation and expanded possibilities to influence decision-making; opportunities to add or create new value to protected areas; and the opportunities to manage ecosystems sustainably outside of protected areas. We also review areas in which ecosystem services approaches may not effectively conserve certain aspects of biodiversity. Areas of particular concern in this regard include: species without utilitarian or economic value; ecological processes that do not directly benefit people; and critical ecological functions that may be undermined in attempts to optimize a target service. Understanding the benefits and limitations of using ecosystem services approaches for achieving biodiversity conservation will help ensure that the finite resources available for biodiversity conservation and sustainable development are used as strategically and effectively as possible to maintain the multiple components of biodiversity and to support human well-being

    A Unified Account of the Moral Standing to Blame

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    Recently, philosophers have turned their attention to the question, not when a given agent is blameworthy for what she does, but when a further agent has the moral standing to blame her for what she does. Philosophers have proposed at least four conditions on having “moral standing”: 1. One’s blame would not be “hypocritical”. 2. One is not oneself “involved in” the target agent’s wrongdoing. 3. One must be warranted in believing that the target is indeed blameworthy for the wrongdoing. 4. The target’s wrongdoing must some of “one’s business”. These conditions are often proposed as both conditions on one and the same thing, and as marking fundamentally different ways of “losing standing.” Here I call these claims into question. First, I claim that conditions (3) and (4) are simply conditions on different things than are conditions (1) and (2). Second, I argue that condition (2) reduces to condition (1): when “involvement” removes someone’s standing to blame, it does so only by indicating something further about that agent, viz., that he or she lacks commitment to the values that condemn the wrongdoer’s action. The result: after we clarify the nature of the non-hypocrisy condition, we will have a unified account of moral standing to blame. Issues also discussed: whether standing can ever be regained, the relationship between standing and our "moral fragility", the difference between mere inconsistency and hypocrisy, and whether a condition of standing might be derived from deeper facts about the "equality of persons"

    More haste less speed: A meta-analysis of thinking latencies during planning in people with psychosis

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    Cognitive impairment is a core feature of psychosis, with slowed processing speed thought to be a prominent impairment in schizophrenia and first-episode psychosis. However, findings from the Stockings of Cambridge (SOC) planning task suggest changes in processing speed associated with the illness may include faster responses in early stages of planning, though findings are inconsistent. This review uses meta-analytic methods to assess thinking times in psychosis across the available literature. Studies were identified by searching PubMed, Web of Science and Google Scholar. Eligibility criteria: 1) included a sample of people with non-affective psychosis according to DSM III, DSM IV, DSM V or ICD-10 criteria; 2) employed the SOC task; 3) included a healthy control group; and 4) published in English. We identified 11 studies that employed the SOC task. Results show that people with psychosis have significantly faster initial thinking times than non-clinical participants, but significantly slower subsequent thinking times during problem execution. These findings indicate that differences in processing speed are not limited to slower responses in people with psychosis but may reflect a preference for step-by-step processing rather than planning before task execution. We suggest this style of responding is adopted to compensate for working memory impairment
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