bluuebunny/crossref_metadata_2025_split huggingface dataset:
Heat Transfer Analysis of a Williamson Micropolar Nanofluid with Different Flow Controls
Authors: Muthtamilselvan M. , Ramya E. , Doh D. H. , Cho G. R. 
Published: August 2018

ABSTRACTThe present model is devoted for the steady stagnation point flow of a Williamson micropolar nanofluid with magneto-hydrodynamics and thermal radiation effects passed over a horizontal porous stretching sheet. The fluid is considered to be gray, absorbing-emitting but non-scattering medium. The Cogley-Vincent-Gilles formulation is adopted to simulate the radiation component of heat transfer. By applying similarity analysis, the governing partial differential equations are transformed into a set of non-linear ordinary differential equations and they are solved by using the bvp4c package in MATLAB. Numerical computations are carried out for various values of the physical parameters. The effects of momentum, microrotation, temperature and nanoparticle volume fraction profiles together with the reduced skin friction coefficient, reduced Nusselt number and reduced Sherwood number of both active and passive controls on the wall mass flux are graphically presented. The present results are compared with previously obtained solutions and they are in good agreement. Results show that the skin friction is increasing functions of the Williamson parameter in both stretching and shrinking surfaces.
Supplementing Q-method with narratives: Contextualizing CEOs’ values for family firms
Authors: Pötschke Ivonne 
Published: August 2018

AbstractValues in family firms are influenced by the complex interplay of family and business. Thus, research requires methods that grasp this complexity. This paper presents a fresh methodological approach for family business research with the example of an in-depth analysis of CEOs’ value orientations. Benefits of an integrated use of two qualitative methods – Q-sorts and narrative interviews – which were collected and analyzed for 16 CEOs of family firms are illustrated. Q-method was used to build value patterns, whereas narrative interviews were conducted to reveal how values were contextualized and interpreted. This integrated approach builds qualitative richness in different ways: first, by allowing for a deep understanding of individual experience; second, by providing more contextual insight, and third, by capturing the meaning of abstract values. The approach advanced here can be reproduced for other complex organizational dynamics. Thus, this user-friendly approach is particularly suited for organizational research in a managerial environment.
Human resource management as key pillar of company strategy: Analysis of the line managers’ perception
Authors: Navío-Marco Julio , Solórzano-García Marta , Palencia-González Francisco J. 
Published: August 2018

AbstractThe increasingly frequent involvement of companies’ line managers in human resource (HR) activities leads us to investigate the strategic value that these managers grant HR. This research focusses on the line managers’ perception of the strategic importance of HR, versus the perception of HR managers themselves, as a relevant factor in line managers’ own involvement within the execution of HR-related tasks. If line managers do not perceive the relevance and strategic importance of HR and its key role in the company’s strategy and performance, it is difficult to guarantee the managers’ commitment and effectiveness in HR management implementation. Based on interviews with HR development and line managers in 100 Spanish firms, we verified discrepancies in HR versus line managers’ perceptions, confirming that the assessment given by the line managers is slightly lower and, in turn, providing us with references to draw useful conclusions for a successful implementation of HR practices.
Late Pleistocene and Holocene ice-wedge activity on the Blackstone Plateau, central Yukon, Canada
Authors: Grinter Mike , Lacelle Denis , Baranova Natalia , Murseli Sarah , Clark Ian D. 
Published: August 2018

AbstractIce-wedge activity can be used to reconstruct past environmental conditions. We investigated the moisture source and timing of ice-wedge formation on the Blackstone Plateau. A section of permafrost exposed ice wedges that developed at two distinct depths: the first set formed syngenetically and penetrated alluvial silts from the top of permafrost; the second set, truncated by an erosional or thaw contact, was found solely in icy muddy gravels (>3.1 m depth). The δ18O and D-excess records of the ice wedges suggest that they formed from freezing of snow meltwater whose isotopic composition evolved during meltout. The14CDOCresults suggest that climate was favorable to ice-wedge growth between 32,000–30,000 and 14,000–12,500 cal yr BP, but there was likely a hiatus during the last glacial maximum due to climate being too dry. During the early to mid-Holocene, ice wedges were inactive as a result of warmer and wetter climate. Ice wedge re-initiated around 6360 cal yr BP, with a peak in activity between 3980 and 920 cal yr BP, a period characterized by cool and moist climate. Overall, timing of ice-wedge activity was broadly consistent with the climate and vegetation evolution in the western Arctic.
Rothschild reversed: explaining the exceptionalism of biomedical research, 1971–1981
Authors: DAVIES STEPHEN M. 
Published: August 2018

AbstractThe ‘Rothschild reforms’ of the early 1970s established a new framework for the management of government-funded science. The subsequent dismantling of the Rothschild system for biomedical research and the return of funds to the Medical Research Council (MRC) in 1981 were a notable departure from this framework and ran contrary to the direction of national science policy. The exceptionalism of these measures was justified at the time with reference to the ‘particular circumstances’ of biomedical research. Conventional explanations for the reversal in biomedical research include the alleged greater competence and higher authority of the MRC, together with its claimed practical difficulties. Although they contain some elements of truth, such explanations are not wholly convincing. Alternative explanations hinge on the behaviour of senior medical administrators, who closed ranks to ensure that de facto control was yielded to the MRC. This created an accountability deficit, which the two organizations jointly resolved by dismantling the system for commissioning biomedical research. The nature and working of medical elites were central to this outcome.
Variation of the Variety of Minimal Rational Tangents of Cyclic Coverings
Authors: Kim Hosung 
Published: August 2018

AbstractLet π:X→ ℙnbe thed-cyclic covering branched along a smooth hypersurfaceY⊂ ℙnof degreed, 3 ≤d≤n. We identify the minimal rational curves onXwithd-tangent lines ofYand describe the scheme structure of the variety of minimal rational tangents 𝒞x⊂ ℙTx(X) at a general pointx∈X. We also show that the projective isomorphism type of 𝒞xvaries in a maximal way asxmoves over general points ofX.
Saccular otoconia as a cause of Ménière's disease: hypothesis based on two theories
Authors: Hornibrook J 
Published: August 2018

AbstractBackgroundThe cause of Ménière's disease remains enigmatic after 156 years. Schuknecht's rupture and potassium intoxication theory of attacks was based on histological studies.ObjectivesThis paper aimed to: present the most contemporary evidence indicating that ruptures do not usually occur, and discuss the possibility that detached saccular otoconia are the main cause of Ménière's disease; and to establish an unequivocal definition of the age of Ménière's disease onset.MethodThe paper reviews the electrophysiological basis of the Gibson–Arenberg drainage theory used to explain vertigo attacks. The current, limited knowledge of the likely fate of detached saccular otoconia is discussed.ResultsElectrophysiological studies during attacks do not support endolymph ruptures, but rather endolymph flowing in one direction and then in the opposite direction. Age of onset for Ménière's disease parallels that for benign paroxysmal positional vertigo.ConclusionThe similarity of age of onset spectrum for Ménière's disease and benign paroxysmal positional vertigo raises the possibility that the two conditions have the same fundamental cause.
Diagnosis and treatment of necrotising otitis externa and diabetic foot osteomyelitis – similarities and differences
Authors: Peled C , Kraus M , Kaplan D 
Published: August 2018

AbstractObjectiveNecrotising otitis externa is a severe inflammatory process affecting soft tissue and bone, mostly in diabetic patients. Diabetic patients are also at risk of diabetic foot osteomyelitis, another inflammatory condition involving soft tissue and bone. This review aimed to describe the similarities and differences of these entities in an attempt to further advance the management of necrotising otitis externa.MethodA PubMed search was conducted using the key words ‘otitis externa’, ‘necrotising otitis externa’, ‘malignant otitis externa’, ‘osteomyelitis’ and ‘diabetic foot’.Results and conclusionThe similarities regarding patient population and pathophysiology between necrotising otitis externa and diabetic foot osteomyelitis raise basic questions concerning the effects of long-standing diabetes on the external ear. The concordance between local swabs and bone cultures in diabetic foot osteomyelitis is less than 50 per cent. If this holds true also to necrotising otitis externa, the role of deep tissue cultures should be strongly considered. Similar to diabetic foot osteomyelitis, magnetic resonance imaging should be considered in selected necrotising otitis externa subgroups.
Dislocation of cochlear implant magnet during 1.5 Tesla magnetic resonance imaging despite head bandaging, and its repositioning using an endoscopic approach
Authors: Leong W J C , Yuen H W 
Published: August 2018

AbstractBackgroundDislocation of the cochlear implant magnet is an uncommon but recognised complication of magnetic resonance imaging in a patient with a cochlear implant.Case reportThis paper reports a case of cochlear implant magnet dislocation despite head bandaging. The patient subsequently underwent endoscopic repositioning of the magnet under general anaesthesia. The cochlear implant system was tested intra-operatively and confirmed to be functioning. The patient was well at follow up and the small wound healed well with no complications.ConclusionThis report presents the endoscopic technique as a viable minimally invasive surgical approach to address cochlear implant magnet dislocation.
Defining a combined constellation of complicated bereavement and PTSD and the psychosocial correlates associated with the pattern amongst refugees from West Papua
Authors: Tay Alvin Kuowei , Rees Susan , Tam Natalino , Kareth Moses , Silove Derrick 
Published: August 2018

AbstractBackgroundRefugees are at risk of experiencing a combined constellation of complicated bereavement and posttraumatic stress disorder (PTSD) symptoms following exposure to complex traumas associated with personal threat and loss. Features of identity confusion are central to both complicated bereavement and PTSD and these characteristics may be particularly prominent amongst refugees from traditional cultures displaced from their homelands, families, and kinship groups. We investigate whether a combined pattern of complicated bereavement and PTSD can be identified amongst West Papuan refugees participating in an epidemiological survey (n = 486, response rate: 85.8%) in a remote town in Papua New Guinea.MethodsLatent class analysis was applied to derive subpopulations of refugees based on symptoms of complicated bereavement and PTSD. Associations were examined between classes and traumatic loss events, post-migration living difficulties (PMLDs), and psychosocial support systems.ResultsThe four classes identified comprised a complicated bereavement class (11%), a combined posttraumatic bereavement class (10%), a PTSD class (11%), and a low symptom class (67%). Symptoms of identity confusion were prominent in the posttraumatic bereavement class. Compared with the low symptom class, the combined posttraumatic bereavement class reported greater exposure to traumatic loss events (OR 2.43, 95% CI 1.11–5.34), PMLDs (OR 2.24, 95% CI 1.01–4.6), disruptions to interpersonal bonds and networks (OR 3.3, 95% CI 1.47–7.38), and erosion of roles and identities (OR 2.18, 95% CI 1.11–4.27).ConclusionsRefugees appear to manifest a combined pattern of complicated bereavement and PTSD symptoms in which identity confusion is a prominent feature. This response appears to reflect the combined impact of high levels of exposure to traumatic losses, PMLDs, and disruption of relevant psychosocial systems.
Dynamic changes in white matter microstructure in anorexia nervosa: findings from a longitudinal study
Authors: von Schwanenflug Nina , Müller Dirk K. , King Joseph A. , Ritschel Franziska , Bernardoni Fabio , Mohammadi Siawoosh , Geisler Daniel , Roessner Veit , Biemann Ronald , Marxen Michael , Ehrlich Stefan 
Published: August 2018

AbstractBackgroundGray matter (GM) ‘pseudoatrophy’ is well-documented in patients with anorexia nervosa (AN), but changes in white matter (WM) are less well understood. Here we investigated the dynamics of microstructural WM brain changes in AN patients during short-term weight restoration in a combined longitudinal and cross-sectional study design.MethodsDiffusion-weighted images were acquired in young AN patients before (acAN-Tp1, n = 56) and after (acAN-Tp2, n = 44) short-term weight restoration as well as in age-matched healthy controls (HC, n = 60). Images were processed using Tract-Based-Spatial-Statistics to compare fractional anisotropy (FA) across groups and timepoints.ResultsIn the cross-sectional comparison, FA was significantly reduced in the callosal body in acAN-Tp1 compared with HC, while no differences were found between acAN-Tp2 and HC. In the longitudinal arm, FA increased with weight gain in acAN-Tp2 relative to acAN-Tp1 in large parts of the callosal body and the fornix, while it decreased in the right corticospinal tract.ConclusionsOur findings reveal that dynamic, bidirectional changes in WM microstructure in young underweight patients with AN can be reversed with brief weight restoration therapy. These results parallel those previously observed in GM and suggest that alterations in WM in non-chronic AN are also state-dependent and rapidly reversible with successful intervention.
Efficacy of exposure-based cognitive behaviour therapy for post-traumatic stress disorder in emergency service personnel: a randomised clinical trial
Authors: Bryant Richard A. , Kenny Lucy , Rawson Natasha , Cahill Catherine , Joscelyne Amy , Garber Benjamin , Tockar Julia , Dawson Katie , Nickerson Angela 
Published: August 2018

AbstractBackgroundAlthough emergency service personnel experience markedly elevated the rates of post-traumatic stress disorder (PTSD), there are no rigorously conducted trials for PTSD in this population. This study assessed the efficacy of cognitive behaviour therapy (CBT) for PTSD in emergency service personnel, and examined if brief exposure (CBT-B) to trauma memories is no less efficacious as prolonged exposure (CBT-L).MethodOne hundred emergency service personnel with PTSD were randomised to either immediate CBT-L, CBT-B or wait-list (WL). Following post-treatment assessment, WL participants were randomised to an active treatment. Participants randomised to CBT-L or CBT-B were assessed at baseline, post-treatment and at 6-month follow-up. Both CBT conditions involved 12 weekly individual sessions comprising education, CBT skills building, imaginal exposure, in vivo exposure, cognitive restructuring and relapse prevention. Imaginal exposure occurred for 40 min per session in CBT-L and for 10 min in CBT-B.ResultsAt post-treatment, participants in WL had smaller reductions in PTSD severity (Clinician Administered PTSD Scale), depression, maladaptive appraisals about oneself and the world, and smaller improvements on psychological and social quality of life than CBT-L and CBT-B. There were no differences between CBT-L and CBT-B at follow-up on primary or secondary outcome measures but both CBT-L and CBT-B had large baseline to follow-up effect sizes for reduction of PTSD symptoms.ConclusionsThis study highlights that CBT, which can include either long or brief imaginal exposure, is efficacious in reducing PTSD in emergency service personnel.
Understanding the structure, experiences and challenges of social support for older lesbian, gay and bisexual people: a systematic review
Authors: Hawthorne Oliver , Camic Paul M. , Rimes Katharine A. 
Published: August 2018

AbstractThe psycho-social contexts of older lesbian, gay and bisexual (LGB) individuals suggest that they may face unique strengths and barriers in accessing social support. The present review aimed to explore what is known about this by providing a synthesis of this area of research and a methodological critique. The Applied Social Sciences Index (ASSIA), Psychinfo and Medline databases were searched and 22 relevant articles were identified. Key findings were extracted and quality was assessed using a standardised rating scale. The findings indicated that although many older LGB people report similar-sized support networks to older heterosexuals, more support came from friends and less from biological family members. Many reported not receiving enough support; it is possible that differences in care-giving between friends and family and anticipated social support difficulties due to previous LGB-stigma experiences partially account for this. Current recruitment strategies may mean that more-connected older LGB people are over-represented in research. There is a lack of research with the ‘old-old’ population, bisexual people, those with significant health needs, those outside the United States of America and those with additional characteristics associated with discrimination. Practical and research implications are discussed and it is suggested that friendship–carer dyads may need support to have more explicit discussions about care-giving roles due to a lack of societal templates for these kinds of relationships.
The contribution of dementia to the disparity in family wealth between black and non-black Americans
Authors: Kaufman Jennifer E. , Gallo William T. , Fahs Marianne C. 
Published: August 2018

AbstractThe enormous economic burden of dementia in the United States of America falls disproportionately on families coping with this devastating disease. Black Americans, who are at greater risk of developing dementia than white Americans, hold on average less than one-eighth of the wealth of white Americans. This study explores whether dementia exacerbates this wealth disparity by examining dementia's effect on wealth trajectories of black versus non-black Americans over an eight-year period preceding death, using five waves of data (beginning in 2002 or 2004) on decedents in the 2012 and 2014 waves of the Health and Retirement Study (N = 2,429). Dementia is associated with a loss of 97 per cent of wealth among black Americans, compared with 42 per cent among non-black Americans, while wealth loss among black and non-black Americans without dementia did not differ substantially (15% versus 19%). Dementia appears to increase the probability of wealth exhaustion among both black and non-black Americans, although the estimate is no longer significant after adjusting for all covariates (for blacks, odds ratio (OR) = 2.04, 95% confidence interval (CI) = 0.83, 5.00; for non-blacks, OR = 1.47, 95% CI = 0.95, 2.27). Dementia has a negative association with home-ownership, and the loss or sale of a home may play a mediating role in the exhaustion of wealth among black Americans with dementia.
Perceptions of older people in Ireland and Australia about the use of technology to address falls prevention
Authors: Mackenzie Lynette , Clifford Amanda 
Published: August 2018

AbstractFalls are common events with serious consequences for older people. With an ageing population and increasing health-care costs, information and communication technologies (ICT) will have a potential role in future health-care delivery. However, research on technology acceptance in health care for older people is limited and its application to falls prevention is unknown. The aims of this study were to explore and describe the perceptions of community-dwelling Australian and Irish older people about their current use of technology, and the potential use of technology for falls prevention. Qualitative data were collected from three focus groups conducted in and around Limerick in Ireland, and three in the Sydney area, Australia. A total of 35 older people participated. Data were analysed using thematic analysis. Four themes emerged from the data: (a) perceptions of vulnerability to falls, (b) preferences for exercise interventions, (c) participation in and ownership of technology, and (d) perceptions about applications of technology for falls prevention. As the use of technology is an instrumental activity of daily living, health professionals need to assess the capacity of older people to adopt these technologies, and provide falls prevention interventions to accommodate the technology skills of older people. Some participants were reluctant to embrace technology and barriers to the effective use of technology to assist in preventing falls may conflict with future health service trends.
Corporate Democracy: How Corporations Justified Their Right to Speak in 1970s Boston
Authors: Bowie Nikolas 
Published: August 2018

AbstractIn the early 1970s, the executives of the First National Bank of Boston spent hundreds of thousands of the bank's dollars on ads opposing statewide efforts to raise their personal income taxes. When frustrated Massachusetts legislators banned this sort of corporate spending, the executives sued, arguing that “corporations have the same First Amendment rights as individuals.” In First National Bank of Boston v. Bellotti, the Supreme Court held for the first time that the First Amendment protects all political speech, even ads paid for by a corporation. Surprisingly, the first corporation to take advantage of this decision was not the bank, but the city of Boston--a municipal corporation that spent nearly a million dollars on a new referendum in the fall of 1978.This article discusses the history of the 1978 referendum, one pitting municipal corporations against business corporations. It argues that the referendum and the discourse surrounding it made it intuitive for Bostonians that all corporations, banks and cities, are representative institutions. Corporations can “speak” only by spending money, and the leaders of Boston and the bank justified spending other people's money by pointing to the internal elections that put them in office. But voters were skeptical of the argument that “corporate democracy” alone could guarantee that elected executives spoke with the consent of the people they purported to represent. The article offers a novel contribution to the historiography of modern business and politics: a legal history of how corporations--municipal and financial--became politicized in the wake of evolving First Amendment free-speech doctrine.