1,241,683 research outputs found

    WFMOS - Sounding the Dark Cosmos

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    Vast sound waves traveling through the relativistic plasma during the first million years of the universe imprint a preferred scale in the density of matter. We now have the ability to detect this characteristic fingerprint in the clustering of galaxies at various redshifts and use it to measure the acceleration of the expansion of the Universe. The Wide-Field Multi-Object Spectrograph (WFMOS) would use this test to shed significant light on the true nature of dark energy, the mysterious source of this cosmic acceleration. WFMOS would also revolutionise studies of the kinematics of the Milky Way and provide deep insights into the clustering of galaxies at redshifts up to z~4. In this article we discuss the recent progress in large galaxy redshift surveys and detail how WFMOS will help unravel the mystery of dark energy.Comment: 6 pages, pure pdf. An introduction to WFMOS and Baryon Acoustic Oscillations for a general audienc

    Dark Energy and Cosmic Sound: w(z) Surveys with the Gemini/Subaru Wide-Field Multi-Object Spectrograph

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    This white paper gives an overview of the proposed Gemini/Subaru Wide-Field Multi-Object Spectrograph (WFMOS) and the proposed redshift surveys of 2.6 million galaxies with 0.5<z<3.3 over 2000 deg^2 of sky. These surveys will probe the baryonic acoustic oscillations in the galaxy power spectrum with unprecedented precision and over a range of redshifts and deliver dark energy w(z) constraints an order of magnitude better than current limits. We discuss the requirements on precursor observations and on calibrations, the systematics in the method and the quantitative precision obtainaible in distance-redshift and expansion-rate-redshift measurements which feed in to the w(z) precision. We also outline the technological and scientific strengths and risks which might be associated with the project and the relationship of WFMOS to other baryon oscillation experiments.Comment: White paper submitted to the Dark Energy Task Force. 13 page

    Trust economics feasibility study

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    We believe that enterprises and other organisations currently lack sophisticated methods and tools to determine if and how IT changes should be introduced in an organisation, such that objective, measurable goals are met. This is especially true when dealing with security-related IT decisions. We report on a feasibility study, Trust Economics, conducted to demonstrate that such methodology can be developed. Assuming a deep understanding of the IT involved, the main components of our trust economics approach are: (i) assess the economic or financial impact of IT security solutions; (ii) determine how humans interact with or respond to IT security solutions; (iii) based on above, use probabilistic and stochastic modelling tools to analyse the consequences of IT security decisions. In the feasibility study we apply the trust economics methodology to address how enterprises should protect themselves against accidental or malicious misuse of USB memory sticks, an acute problem in many industries

    A feasibility study of the effects of implementing a staff-level recovery-oriented training intervention older people’s mental health services

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    Objectives: The concept of recovery has exerted considerable traction in mental health services for adults of working age, but less so in older people’s mental health services. The aim of this study was to evaluate the feasibility of a staff-level recovery intervention in older people’s mental health services.Method: The study used a mixed-method pre-post design. The study took place in NHS older people’s mental health services, UK. Staff participants were multi-disciplinary mental health team members from the same service. The intervention was a manualised staff-level recovery intervention called the Older Adults Recovery Intervention (OARI). Measurement included the Recovery Knowledge Inventory and the Recovery Attitudes Questionnaire (RAQ-7) as well as fidelity data and in-depth qualitative interviews.Results: OARI was delivered to 204 staff in 15 clinical teams. There was a statistically significant change towards improvement in four of the six recovery attitude and knowledge sub-scales. There were positive findings in change in practice at individual level, but not at team level. A number of context barriers were identified leading to the intervention not being delivered as intended.Conclusions: Further development of OARI will involve a clearer distinction about the practice implications for service users with dementia versus functional illnesses, a stronger focus on implementation support, more use of evidence in training materials and a tailoring of context to meet professional group training needs. Overall, this study contributes novel data to the evidence base for recovery within older people’s mental health services

    Feasibility study of biohydrogen production from acid cheese whey via lactate-driven dark fermentation

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    Producción CientíficaThe high loading of lactic acid bacteria (LAB) present in cheese whey still limits its use as hydrogen feedstock. This study aims to investigate the feasibility of producing hydrogen from acid cheese whey via lactate-driven dark fermentation (LD-DF). Mesophilic batch fermentations were performed with delipidated acid cheese whey at a fixed pH of 5.8 and driven by an acidogenic bacterial culture containing LAB and lactate-oxidizing hydrogen producers (LO-HPB). The results obtained indicated that it is technically feasible to produce hydrogen from undiluted cheese whey through lactate oxidation-mediated fermentation. It was elucidated that the acidogenic fermentation of cheese whey followed a two-step lactate-type fermentation, in which fermentable carbohydrates were first converted into lactate, and then lactate was metabolized into hydrogen with the co-production of butyrate. The hydrogen yield and the maximum volumetric hydrogen production rate achieved were 44.5 ± 2.9 NmL/g-CODfed and 1.9 NL/L-d, respectively. Further microbial community analysis revealed that Lactobacillus, Clostridium, and Klebsiella were the dominant bacterial genera when the hydrogen production rate peaked. It was therefore suggested that the metabolic potential behind the association between LAB and LO-HPB was important in driving the two-step lactate-type fermentation. Overall, the LD-DF can be a strategic hydrogen-producing pathway to be implemented with cheese whey.Consejo Nacional de Ciencia y Tecnología (CONACYT) - (Project CF-2023-G-648).Consejo Nacional de Ciencia y Tecnología (CONACYT) - (grant 2021-000001- 01NACF-1444)Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación (AEI)/10.13039/501100011033 - (Grant RYC2021-034559-I)Junta de Castilla y León y Fondo Europeo de Desarrollo Regional (FEDER) - (grant CL-EI-2021-07

    The Wiltshire Wills Feasibility Study

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    The Wiltshire and Swindon Record Office has nearly ninety thousand wills in its care. These records are neither adequately catalogued nor secured against loss by facsimile microfilm copies. With support from the Heritage Lottery Fund the Record Office has begun to produce suitable finding aids for the material. Beginning with this feasibility study the Record Office is developing a strategy to ensure the that facsimiles to protect the collection against risk of loss or damage and to improve public access are created.&lt;p&gt;&lt;/p&gt; This feasibility study explores the different methodologies that can be used to assist the preservation and conservation of the collection and improve public access to it. The study aims to produce a strategy that will enable the Record Office to create digital facsimiles of the Wills in its care for access purposes and to also create preservation quality microfilms. The strategy aims to seek the most cost effective and time efficient approach to the problem and identifies ways to optimise the processes by drawing on the experience of other similar projects. This report provides a set of guidelines and recommendations to ensure the best use of the resources available for to provide the most robust preservation strategy and to ensure that future access to the Wills as an information resource can be flexible, both local and remote, and sustainable
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