bluuebunny/crossref_metadata_2025_split huggingface dataset:
Electronic archaeology
Authors: Champion Sara , Chippindale Christopher 
Published: November 2015

For centuries, the right place to look, when in search of the best archaeological knowledge, has been in some kind of printed book. There will once have been a manuscript, and if the book never materialized, a manuscript may substitute, but what usually matters is the better truth that has the authority of print.In a now-standard joke, a wizard of a yet-newer information display system is described: hugely flexible in size and in format and in what it can present, made of cheap and common materials, wholly recyclable, and — best of all — requiring no screen or display device of any kind whatsoever. At some point you realize the miracle being described is a book. But the book is for many purposes deservedly obsolescent, and archaeological research is in truth already in the age beyond the printed book. Specialist illustrated publications have high fixed costs in the print, and low circulations mean there are too few copies to spread the costs over. When the first new technology of cheap reprographics came in a generation ago, the ‘grey literature’ of field reports began to grow, soon reaching a point at which no library and no individual could be relied on to possess the ‘collected literature’ on any topic of large range. Now an increasing amount of archaeological knowledge is only or better made accessible electronically.
The social rhythm of the rock music festival
Authors: Tjora Aksel 
Published: November 2015

AbstractOn the basis of observational studies in a number of rock music festivals during the period 2004–2012, I ask the following question in this paper: how does the music festival community arise and how is it maintained? With the help of perspectives from interactionist sociology and organisational studies I develop an analysis of how rock music festival ‘skills’ are collectively produced. A communally acknowledged competence is negotiated and made explicit by means, among other things, of the synchronisation of a daily rhythm that becomes common to many festivals. The present analysis will employ a close description of this rhythm's phases, and how transitions between them are interactively negotiated. While rock music festivals certainly celebrate fandom, this paper draws attention to processes that build strong senses of community between participants while joining together in the camping site, outside stage areas. The social rhythm, as it is interactively and artfully produced between participants, makes the festival recognisableas a festival, and attractive as a social event. A profound sense of connectedness between participants is to be found between the tents in the festival camp.
Motivic invariants of real polynomial functions and their Newton polyhedrons
Authors: FICHOU GOULWEN , FUKUI TOSHIZUMI 
Published: November 2015

AbstractWe give an expression of the motivic zeta function for a real polynomial function in terms of the Newton polyhedron of the function. As a consequence, we show that the weights are determined by the motivic zeta function for convenient weighted homogeneous polynomials in three variables. We apply this result to the blow-Nash equivalence.
Mental illness stigma, secrecy and suicidal ideation
Authors: Oexle N. , Ajdacic-Gross V. , Kilian R. , Müller M. , Rodgers S. , Xu Z. , Rössler W. , Rüsch N. 
Published: November 2015

Aims.Whether the public stigma associated with mental illness negatively affects an individual, largely depends on whether the person has been labelled ‘mentally ill’. For labelled individuals concealing mental illness is a common strategy to cope with mental illness stigma, despite secrecy's potential negative consequences. In addition, initial evidence points to a link between stigma and suicidality, but quantitative data from community samples are lacking.Methods.Based on previous literature about mental illness stigma and suicidality, as well as about the potential influence of labelling processes and secrecy, a theory-driven model linking perceived mental illness stigma and suicidal ideation by a mediation of secrecy and hopelessness was established. This model was tested separately among labelled and unlabelled persons using data derived from a Swiss cross-sectional population-based study. A large community sample of people with elevated psychiatric symptoms was examined by interviews and self-report, collecting information on perceived stigma, secrecy, hopelessness and suicidal ideation. Participants who had ever used mental health services were considered as labelled ‘mentally ill’. A descriptive analysis, stratified logistic regression models and a path analysis testing a three-path mediation effect were conducted.Results.While no significant differences between labelled and unlabelled participants were observed regarding perceived stigma and secrecy, labelled individuals reported significantly higher frequencies of suicidal ideation and feelings of hopelessness. More perceived stigma was associated with suicidal ideation among labelled, but not among unlabelled individuals. In the path analysis, this link was mediated by increased secrecy and hopelessness.Conclusions.Results from this study indicate that among persons labelled ‘mentally ill’, mental illness stigma is a contributor to suicidal ideation. One explanation for this association is the relation perceived stigma has with secrecy, which introduces negative emotional consequences. If our findings are replicated, they would suggest that programmes empowering people in treatment for mental illness to cope with anticipated and experienced discrimination as well as interventions to reduce public stigma within society could improve suicide prevention.
“Why don't you think of Malaysia?” - Narratives on Educational Migration, Emotions, and Social Capital among Transnational Students
Authors: Carlson Marie , Jacobsson Bengt 
Published: November 2015

AbstractThis contribution is about a female transnational student from Turkey, Hafize, studying for four years at an Islamic Malaysian university. She was interviewed during the research project “Transnational Student Mobility in Higher Education in Asia”, a multi-sited ethnographic project containing six sub-studies aiming to illuminate student voices and the impact of cultural processes on student-inhabited transnational spaces, identity negotiations, and networks. Through a bottom-up perspective, and with life story as the principal method, the project illustrates processes of social change and relations between the individual and society. Questions are posed about,inter alia, the motivations and reasons that may be identified in the educational stories. Hafize's narrative is discussed as a relational and contextual story, in which family relations and the significance of education, gender, ethnicity, religion, and socio-economic and political situations intersect. Education is given different meanings: instrumental and reflexive as well as emotional aspects. Turning points and the concept of capital, especially social and emotional capital, are addressed. Hafize's family of eight siblings is deeply involved in serial reciprocity, a tightly bonded network supporting all the children in their efforts to study. Hafize's story is substantially gendered and ‘ethnified’ – a reflexive emotional identity project, in which education and religion are given high priority. In Turkey secularist legislation was an obstacle. The studies abroad provided possibilities for self-development but tempered with some limitations.
Cytosolic phospholipase A2 regulates alcohol-mediated astrocyte inflammatory responses in HIV-associated neurocognitive disorders
Authors: Pandey R , Ghorpade A 
Published: November 2015

AbstractAlcohol (EtOH) abuse and HIV-1 infection remain leading public health problems not only in the United States but also across the world. Alcohol abusers have a significantly greater risk of HIV-1 infection than non-drinkers globally. In the United States, prevalence of EtOH abuse is over two-fold higher in HIV-1-positive individuals than that of the general population. Although alcohol abusers show neurodegeneration, exacerbated neuroinflammation and oxidative damage, the mechanism(s) by which EtOH regulates astrocyte inflammatory responses in HIV-associated neurocognitive disorders is unknown. Thus, we explored signaling pathway(s) involved in EtOH-mediated activation of human astrocytes with HIV-1 and subsequent alterations in their inflammatory functions. Alcohol exposure altered the morphology of astrocytes, proinflammatory responses and induced cytotoxicity in a dose-dependent manner. Time-dependent changes were also evaluated. EtOH and HIV-1 cotreatment decreased cell viability and proliferation, while increasing apoptosis and mitochondrial depolarization. EtOH and HIV-1 together increased the levels of proinflammatory molecules, interleukin-1β, tumor necrosis factor-α, CXCL8, tissue inhibitor of metalloproteinases-1 and more importantly, arachidonic acid, a known downstream target of cytosolic phospholipase A2 (cPLA2). Consistent with this observation, phospho-cPLA2 levels were augmented in HIV-1 and EtOH cotreatment as compared with HIV-1 or EtOH alone. Cyclooxygenase 2 was upregulated as measured by real-time PCR and western blot, whereas cotreatment of HIV-1 and EtOH decreased cytochrome P450-2E1 levels as compared with EtOH alone. Furthermore, we confirmed that blocking cPLA2 with arachidonyl tri floro methyl ketone, a cPLA2-specific inhibitor, effectively prevented cPLA2 phosphorylation and downstream outcomes. Thus, the present findings suggest that cPLA2 has a critical role in alcohol and HIV-induced astrocyte inflammation. In the future, cPLA2 inhibitors may present novel therapeutic tools to treat alcohol abuse and HIV-associated neurocognitive disorder comorbidity.
Enhanced optoelectronic quality of perovskite thin films with hypophosphorous acid for planar heterojunction solar cells
Authors: Zhang Wei , Pathak Sandeep , Sakai Nobuya , Stergiopoulos Thomas , Nayak Pabitra K. , Noel Nakita K. , Haghighirad Amir A. , Burlakov Victor M. , deQuilettes Dane W. , Sadhanala Aditya , Li Wenzhe , Wang Liduo , Ginger David S. , Friend Richard H. , Snaith Henry J. 
Published: November 2015

AbstractSolution-processed metal halide perovskite semiconductors, such as CH3NH3PbI3, have exhibited remarkable performance in solar cells, despite having non-negligible density of defect states. A likely candidate is halide vacancies within the perovskite crystals, or the presence of metallic lead, both generated due to the imbalanced I/Pb stoichiometry which could evolve during crystallization. Herein, we show that the addition of hypophosphorous acid (HPA) in the precursor solution can significantly improve the film quality, both electronically and topologically, and enhance the photoluminescence intensity, which leads to more efficient and reproducible photovoltaic devices. We demonstrate that the HPA can reduce the oxidized I2back into I−, and our results indicate that this facilitates an improved stoichiometry in the perovskite crystal and a reduced density of metallic lead.
Nitric oxide mediates glial-induced neurodegeneration in Alexander disease
Authors: Wang Liqun , Hagemann Tracy L. , Kalwa Hermann , Michel Thomas , Messing Albee , Feany Mel B. 
Published: November 2015

AbstractGlia play critical roles in maintaining the structure and function of the nervous system; however, the specific contribution that astroglia make to neurodegeneration in human disease states remains largely undefined. Here we use Alexander disease, a serious degenerative neurological disorder caused by astrocyte dysfunction, to identify glial-derived NO as a signalling molecule triggering astrocyte-mediated neuronal degeneration. We further find that NO acts through cGMP signalling in neurons to promote cell death. Glial cells themselves also degenerate, via the DNA damage response and p53. Our findings thus define a specific mechanism for glial-induced non-cell autonomous neuronal cell death, and identify a potential therapeutic target for reducing cellular toxicity in Alexander disease, and possibly other neurodegenerative disorders with glial dysfunction.
Fractionally charged skyrmions in fractional quantum Hall effect
Authors: Balram Ajit C. , Wurstbauer U. , Wójs A. , Pinczuk A. , Jain J. K. 
Published: November 2015

AbstractThe fractional quantum Hall effect has inspired searches for exotic emergent topological particles, such as fractionally charged excitations, composite fermions, abelian and nonabelian anyons and Majorana fermions. Fractionally charged skyrmions, which support both topological charge and topological vortex-like spin structure, have also been predicted to occur in the vicinity of 1/3 filling of the lowest Landau level. The fractional skyrmions, however, are anticipated to be exceedingly fragile, suppressed by very small Zeeman energies. Here we show that, slightly away from 1/3 filling, the smallest manifestations of the fractional skyrmion exist in the excitation spectrum for a broad range of Zeeman energies, and appear in resonant inelastic light scattering experiments as well-defined resonances slightly below the long wavelength spin wave mode. The spectroscopy of these exotic bound states serves as a sensitive tool for investigating the residual interaction between composite fermions, responsible for delicate new fractional quantum Hall states in this filling factor region.
Silicon nanocrystal growth under irradiation of electron beam
Authors: Huang Wei-Qi , Liu Shi-Rong , Huang Zhong-Mei , Dong Tai-Ge , Wang Gang , Qin Cao-Jian 
Published: November 2015

AbstractIn our experiment, it was observed that silicon nanocrystal rapidly grows with irradiation of electron beam on amorphous silicon film prepared by pulsed laser deposition and shape of silicon nanocrystal is usually sphere in smaller nanoscale with less exposure time under electron beam, in which the quantum dots are prepared in nanoscale near 3 nm. In the electron interaction process, it was investigated that the various crystals structures in different orientations occur in the same time and the condensed structures of silicon nanocrystal are changed with different impurity atoms in silicon film.
Triple-doped KMnF3:Yb3+/Er3+/Tm3+ nanocubes: four-color upconversion emissions with strong red and near-infrared bands
Authors: Wang Hao , Hong Xiaodong , Han Renlu , Shi Junhui , Liu Zongjun , Liu Shujuan , Wang You , Gan Yang 
Published: November 2015

AbstractTriple-doped (Yb3+/Er3+/Tm3+) KMnF3 nanocubes with uniform sizes of 250 nm were synthesized by a facile hydrothermal route using the oleic acid as the capping agent. It was found that these nanocubes can simultaneously exhibited four-color (blue, green, red and NIR) upconversion emissions under a single 980 nm near-infrared (NIR) laser excitation, which should have potential multicolor in vivo imaging applications. Specifically, the red (660 nm) and NIR (800 nm) peaks, known as two “optical windows” for imaging biological tissues, were strong. The spectral and pump analyses indicated the two-photon processes were responsible for the both red and NIR emissions.
Observation of strongly enhanced photoluminescence from inverted cone-shaped silicon nanostructures
Authors: Schmitt Sebastian W. , Sarau George , Christiansen Silke 
Published: November 2015

AbstractSilicon nanowires (SiNWs) attached to a wafer substrate are converted to inversely tapered silicon nanocones (SiNCs). After excitation with visible light, individual SiNCs show a 200-fold enhanced integral band-to-band luminescence as compared to a straight SiNW reference. Furthermore, the reverse taper is responsible for multifold emission peaks in addition to the relatively broad near-infrared (NIR) luminescence spectrum. A thorough numerical mode analysis reveals that unlike a SiNW the inverted SiNC sustains a multitude of leaky whispering gallery modes. The modes are unique to this geometry and they are characterized by a relatively high quality factor (Q ~ 1300) and a low mode volume (0.2 < (λ/neff)3 < 4). In addition they show a vertical out coupling of the optically excited NIR luminescence with a numerical aperture as low as 0.22. Estimated Purcell factors Fp ∝ Q/Vm of these modes can explain the enhanced luminescence in individual emission peaks as compared to the SiNW reference. Investigating the relation between the SiNC geometry and the mode formation leads to simple design rules that permit to control the number and wavelength of the hosted modes and therefore the luminescent emission peaks.
Onset of frequent dust storms in northern China at ~AD 1100
Authors: He Yuxin , Zhao Cheng , Song Mu , Liu Weiguo , Chen Fahu , Zhang Dian , Liu Zhonghui 
Published: November 2015

AbstractDust storms in northern China strongly affect the living and health of people there and the dusts could travel a full circle of the globe in a short time. Historically, more frequent dust storms occurred during cool periods, particularly the Little Ice Age (LIA), generally attributed to the strengthened Siberian High. However, limited by chronological uncertainties in proxy records, this mechanism may not fully reveal the causes of dust storm frequency changes. Here we present a late Holocene dust record from the Qaidam Basin, where hydrological changes were previously reconstructed and examine dust records from northern China, including the ones from historical documents. The records, being broadly consistent, indicate the onset of frequent dust storms at ~AD 1100. Further, peaked dust storm events occurred at episodes of high total solar irradiance or warm-dry conditions in source regions, superimposed on the high background of frequent dust storms within the cool LIA period. We thus suggest that besides strong wind activities, the centennial-scale dust storm events over the last 1000 years appear to be linked to the increased availability of dust source. With the anticipated global warming and deteriorating vegetation coverage, frequent occurrence of dust storms in northern China would be expected to persist.
High nutrient-use efficiency during early seedling growth in diverse Grevillea species (Proteaceae)
Authors: He Tianhua , Fowler William M. , Causley Casey L. 
Published: November 2015

AbstractSeveral hypotheses have been proposed to explain the rich floristic diversity in regions characterised by nutrient-impoverished soils; however, none of these hypotheses have been able to explain the rapid diversification over a relatively short evolutionary time period of Grevillea, an Australian plant genus with 452 recognised species/subspecies and only 11 million years of evolutionary history. Here, we hypothesise that the apparent evolutionary success of Grevillea might have been triggered by the highly efficient use of key nutrients. The nutrient content in the seeds and nutrient-use efficiency during early seedling growth of 12 species of Grevillea were compared with those of 24 species of Hakea, a closely related genus. Compared with Hakea, the Grevillea species achieved similar growth rates (root and shoot length) during the early stages of seedling growth but contained only approximately half of the seed nutrient content. We conclude that the high nutrient-use efficiency observed in Grevillea might have provided a selective advantage in nutrient-poor ecosystems during evolution and that this property likely contributed to the evolutionary success in Grevillea.
Resting-state cerebellar-cerebral networks are differently affected in first-episode, drug-naive schizophrenia patients and unaffected siblings
Authors: Guo Wenbin , Liu Feng , Chen Jindong , Wu Renrong , Zhang Zhikun , Yu Miaoyu , Xiao Changqing , Zhao Jingping 
Published: November 2015

AbstractDysconnectivity hypothesis posits that schizophrenia is a disorder with dysconnectivity of the cortico-cerebellar-thalamic-cortical circuit (CCTCC). However, it remains unclear to the changes of the cerebral connectivity with the cerebellum in schizophrenia patients and unaffected siblings. Forty-nine patients with first-episode, drug-naive schizophrenia patients, 46 unaffected siblings of schizophrenia patients and 46 healthy controls participated in the study. Seed-based resting-state functional connectivity approach was employed to analyze the data. Compared with the controls, the patients and the siblings share increased default-mode network (DMN) seed – right Crus II connectivity. The patients have decreased right dorsal attention network (DAN) seed – bilateral cerebellum 4,5 connectivity relative to the controls. By contrast, the siblings exhibit increased FC between the right DAN seed and the right cerebellum 6 and right cerebellum 4,5 compared to the controls. No other abnormal connectivities (executive control network and salience network) are observed in the patients/siblings relative to the controls. There are no correlations between abnormal cerebellar-cerebral connectivities and clinical variables. Cerebellar-cerebral connectivity of brain networks within the cerebellum are differently affected in first-episode, drug-naive schizophrenia patients and unaffected siblings. Increased DMN connectivity with the cerebellum may serve as potential endophenotype for schizophrenia.
Sucrose metabolism gene families and their biological functions
Authors: Jiang Shu-Ye , Chi Yun-Hua , Wang Ji-Zhou , Zhou Jun-Xia , Cheng Yan-Song , Zhang Bao-Lan , Ma Ali , Vanitha Jeevanandam , Ramachandran Srinivasan 
Published: November 2015

AbstractSucrose, as the main product of photosynthesis, plays crucial roles in plant development. Although studies on general metabolism pathway were well documented, less information is available on the genome-wide identification of these genes, their expansion and evolutionary history as well as their biological functions. We focused on four sucrose metabolism related gene families including sucrose synthase, sucrose phosphate synthase, sucrose phosphate phosphatase and UDP-glucose pyrophosphorylase. These gene families exhibited different expansion and evolutionary history as their host genomes experienced differentiated rates of the whole genome duplication, tandem and segmental duplication, or mobile element mediated gene gain and loss. They were evolutionarily conserved under purifying selection among species and expression divergence played important roles for gene survival after expansion. However, we have detected recent positive selection during intra-species divergence. Overexpression of 15 sorghum genes in Arabidopsis revealed their roles in biomass accumulation, flowering time control, seed germination and response to high salinity and sugar stresses. Our studies uncovered the molecular mechanisms of gene expansion and evolution and also provided new insight into the role of positive selection in intra-species divergence. Overexpression data revealed novel biological functions of these genes in flowering time control and seed germination under normal and stress conditions.