bluuebunny/crossref_metadata_2025_split huggingface dataset:
A reinsurance risk model with a threshold coverage policy: the Gerber–Shiu penalty function
Authors: Boxma Onno J. , Frostig Esther , Perry David 
Published: April 2017

AbstractWe consider a Cramér–Lundberg insurance risk process with the added feature of reinsurance. If an arriving claim finds the reserve below a certain threshold γ, or if it would bring the reserve below that level, then a reinsurer pays part of the claim. Using fluctuation theory and the theory of scale functions of spectrally negative Lévy processes, we derive expressions for the Laplace transform of the time to ruin and of the joint distribution of the deficit at ruin and the surplus before ruin. We specify these results in much more detail for the threshold set-up in the case of proportional reinsurance.
New constraints from zircon, monazite and uraninite dating on the commencement of sedimentation in the Cuddapah basin, India
Authors: SAHOO DEBIDARSANI , PRUSETH KAMAL LOCHAN , UPADHYAY DEWASHISH , RANJAN SAMEER , PAL DIPAK C. , BANERJEE RAHUL , GUPTA SHEKHAR 
Published: April 2017

AbstractThe Cuddapah basin in southern India, consisting of the Palnad, Srisailam, Kurnool and Papaghni sub-basins, contains unmetamorphosed and undeformed sediments deposited during a long span of time in the Proterozoic. In the absence of robust age constraints, there is considerable confusion regarding the relative timing of sedimentation in these sub-basins. In this study, U–Pb isotopic dating of zircon and U–Th–Pbtotaldating of monazite and uraninite from the gritty quartzite that supposedly belongs to the formation Banganapalle Quartzite have been used to constrain the beginning of sedimentation in the Palnad sub-basin. Magmatic and detrital zircons recording an age of 2.53 Ga indicate that the sediments were derived from the granitic basement or similar sources and were deposited after 2.53 Ga. Hydrothermally altered zircons both in the basement and the cover provide concordant ages of 2.32 and 2.12 Ga and date two major hydrothermal events. Thus, the gritty quartzite must have been deposited sometime between 2.53 and 2.12 Ga and represents the earliest sediments in the Cuddapah basin. Monazite and uraninite give a wide spectrum of ages between 2.5 Ga and 150 Ma, which indicates several pulses of hydrothermal activity over a considerable time span, both in the basement granite and the overlying quartzite. The new age constraints suggest that the gritty quartzite may be stratigraphically equivalent to the Gulcheru Quartzite that is the oldest unit in the Cuddapah basin, and that a sedimentary/erosional hiatus exists above it.
High-frequency plasma fluctuations in the middle magnetosheath and near its boundaries: Spektr-R observations
Authors: Rakhmanova Liudmila S. , Riazantseva M. O. , Zastenker G. N. , Yermolaev Yu. I. 
Published: April 2017

We present a case study of the flank magnetosheath crossing by the Spektr-R satellite. High time resolution measurements of the ion flux value and its direction provided by the BMSW (Fast Solar Wind Monitor) instrument are examined at different distances from the magnetosheath boundaries – the bow shock and the magnetopause. The magnetosheath behind the quasi-perpendicular bow shock is analysed. The time resolution of these data – 31 ms – is sufficient for observing the frequency spectra of plasma fluctuations both at the magnetohydrodynamics (MHD) and ion kinetic scales. Generally, MHD scales are characterised by Kolmogorov-like spectra ${\sim}f^{-5/3}$ while spectra at kinetic scales are steeper with a break existing between the two scales. We examine evolution of spectral parameters such as power density and slopes, and the break frequency together with the evolution of properties of the probability distribution function. We find out that (i) power spectral densities of the two quantities change differently toward the magnetosheath (MSH) boundaries, (ii) the spectra slopes do not change significantly across the magnetosheath, (iii) the break frequency of the spectrum changes toward the magnetopause. In the middle MSH the spectra are affected by instabilities supposed to be ion cyclotron instabilities. We demonstrate that the plasma is low intermittent in the middle MSH and highly intermittent near its boundaries in the absence of large-scale variations.
Longitudinal effects of disaster-related experiences on mental health among Fukushima nuclear plant workers: The Fukushima NEWS Project Study
Authors: Ikeda A. , Tanigawa T. , Charvat H. , Wada H. , Shigemura J. , Kawachi I. 
Published: April 2017

BackgroundThe Fukushima Nuclear Energy Workers' Support (NEWS) Project Study previously showed that experiences related to the Fukushima nuclear disaster on 11 March 2011 had a great impact on psychological states, including post-traumatic stress response (PTSR) and general psychological distress (GPD), among the Fukushima nuclear plant workers. To determine the causal relationship between disaster-related experiences and levels of psychological states, we conducted a 3-year longitudinal study from 2011 to 2014.MethodPTSR and GPD of the nuclear plant workers were assessed by annual questionnaires conducted from 2011 to 2014. The present study included a total of 1417 workers who provided an assessment at baseline (2011). A total of 4160 observations were used in the present analysis. The relationship between disaster-related experiences and psychological states over time was analysed using mixed-effects logistic regression models.ResultsA declining influence of disaster-related experiences on PTSR over time was found. However, the impact on PTSR remained significantly elevated even 3 years after the disaster in several categories of exposure including the experience of life-threatening danger, experiences of discrimination, the witnessing of plant explosion, the death of a colleague and home evacuation. The associations between GPD and disaster-related experiences showed similar effects.ConclusionsThe effects of disaster-related experiences on psychological states among the nuclear plant workers reduced over time, but remained significantly high even 3 years after the event.
The inner world of overactive monitoring: neural markers of interoception in obsessive–compulsive disorder
Authors: Yoris A. , García A. M. , Traiber L. , Santamaría-García H. , Martorell M. , Alifano F. , Kichic R. , Moser J. S. , Cetkovich M. , Manes F. , Ibáñez A. , Sedeño L. 
Published: April 2017

BackgroundObsessive–compulsive disorder (OCD) patients typically overmonitor their own behavior, as shown by symptoms of excessive doubt and checking. Although this is well established for the patients’ relationship with external stimuli in the environment, no study has explored their monitoring of internal body signals, a process known to be affected in anxiety-related syndromes. Here, we explored this issue through a cardiac interoception task that measures sensing of heartbeats. Our aim was to explore key behavioral and electrophysiological aspects of internal-cue monitoring in OCD, while examining their potential distinctiveness in this condition.MethodWe administered a heartbeat detection (HBD) task (with related interoceptive confidence and awareness measures) to three matched groups (OCD patients, panic disorder patients, healthy controls) and recorded ongoing modulations of two task-relevant electrophysiological markers: the heart evoked potential (HEP) and the motor potential (MP).ResultsBehaviorally, OCD patients outperformed controls and panic patients in the HBD task. Moreover, they exhibited greater amplitude modulation of both the HEP and the MP during cardiac interoception. However, they evinced poorer confidence and awareness of their interoceptive skills.ConclusionsConvergent behavioral and electrophysiological data showed that overactive monitoring in OCD extends to the sensing of internal bodily signals. Moreover, this pattern discriminated OCD from panic patients, suggesting a condition-distinctive alteration. Our results highlight the potential of exploring interoceptive processes in the OCD spectrum to better characterize the population's cognitive profile. Finally, these findings may lay new bridges between somatic theories of emotion and cognitive models of OCD.
An international multi-site, randomized controlled trial of a mindfulness-based psychoeducation group programme for people with schizophrenia
Authors: Chien W. T. , Bressington D. , Yip A. , Karatzias T. 
Published: April 2017

BackgroundWe aimed to test a mindfulness-based psychoeducation group (MBPEG), v. a conventional psychoeducation group (CPEG) v. treatment as usual (TAU), in patients with schizophrenia-spectrum disorders over a 24-month follow-up.MethodThis single-blind, multi-site, pragmatic randomized controlled trial was conducted in six community treatment facilities across three countries (Hong Kong, mainland China and Taiwan). Patients were randomly allocated to one of the treatment conditions, and underwent 6 months of treatment. The primary outcomes were changes in duration of re-hospitalizations and mental state (Positive and Negative Syndrome Scale; PANSS) between baseline and 1 week, and 6, 12 and 18 months post-treatment.ResultsA total of 300 patients in each country were assessed for eligibility between October 2013 and 30 April 2014, 38 patients per country (n = 342) were assigned to each treatment group and included in the intention-to-treat analysis. There was a significant difference in the length of re-hospitalizations between the three groups over 24 months (F2,330 = 5.23, p = 0.005), with MBPEG participants having a shorter mean duration of re-hospitalizations than those in the other groups. The MBPEG and CPEG participants had significant differential changes in proportional odds ratios of complete remission (all individual PANSS items <3) over the 24-month follow-up (37 and 26%, respectively), as opposed to only 7.2% of the TAU group (χ2 = 8.9 and 8.0, p = 0.001 and 0.003, relative risk = 3.5 and 3.1, 95% confidence interval 2.0–7.2 and 1.6–6.3).ConclusionsCompared with TAU and CPEG, MBPEG improves remission and hospitalization rates of people with schizophrenia spectrum disorders over 24 months.
Social Impact Bonds: The Role of Private Capital in Outcome-Based Commissioning
Authors: EDMISTON DANIEL , NICHOLLS ALEX 
Published: April 2017

AbstractSocial impact bonds are payment by results contracts that leverage private social investment to cover the up-front expenditure associated with welfare services. The introduction of private principles and actors through outcome-based commissioning has received a great deal of attention in social policy research. However, there has been much less attention given to the introduction of private capital and its relation to more established forms of quasi-marketisation. This paper examines what effect private social investment has on outcome-based commissioning and whether the alternative forms of performance measurement and management, that social impact bonds bring to bear on service operations, demonstrate the capacity to engender: innovation in service delivery; improved social outcomes; future cost savings; and additionality. This paper draws on an in-depth study of four social impact bonds in the UK context, asthewelfare regime at the vanguard of this policy development. The findings suggest that the introduction of private capital in outcome-based commissioning has had a number of unique and unintended effects on service providers, operations and outcomes. The paper concludes by considering whether social impact bonds represent a risk or an opportunity for public service reform both in the UK and further afield.
A SOCIAL NETWORK ANALYSIS OF THE POSTCLASSIC LOWLAND MAYA OBSIDIAN PROJECTILE INDUSTRY
Authors: Meissner Nathan J. 
Published: April 2017

AbstractThis study addresses the role of prehistoric ethnopolitical divisions, factionalism, and alliances in macroregional economic models. The Mesoamerican Late Postclassic period (a.d.1350–1525) is characterized by its “cosmopolitan” economy featuring long distance exchange of raw materials and finished products. Such characterizations are examined through a provenance analysis of small obsidian projectile points from the Maya lowlands of Guatemala, Mexico, Belize, and Honduras. Obsidian artifacts are analyzed using portable x-ray fluorescence (pXRF) and social network analysis (SNA) methods, revealing at least four sub-networks of point procurement that belonged to nine different ethnopolitical divisions. Local production of points is approached using a novel method of two-mode analysis, demonstrating in some cases that the sources of local obsidian debitage and debris did not coincide with the sources of finished point assemblages. Such information reveals the intricacies of Maya exchange and stresses the importance of local political geography during the Late Postclassic.
Morphological three-dimensional analysis of papillary muscles in borderline left ventricles
Authors: Velasco Forte Mari N. , Nassar Mohamed , Byrne Nick , Silva Vieira Miguel , Pérez Israel V. , Ruijsink Bram , Simpson John , Hussain Tarique 
Published: April 2017

AbstractObjectiveMitral valve anatomy has a significant impact on potential surgical options for patients with hypoplastic or borderline left ventricle. Papillary muscle morphology is a major component regarding this aspect. The purpose of this study was to use cardiac magnetic resonance to describe the differences in papillary muscle anatomy between normal, borderline, and hypoplastic left ventricles.MethodsWe carried out a retrospective, observational cardiac magnetic resonance study of children (median age 5.36 years) with normal (n=30), borderline (n=22), or hypoplastic (n=13) left ventricles. Borderline and hypoplastic cases had undergone an initial hybrid procedure. Morphological features of the papillary muscles, location, and arrangement were analysed and compared across groups.ResultsAll normal ventricles had two papillary muscles with narrow pedicles; however, 18% of borderline and 46% of hypoplastic cases had a single papillary muscle, usually the inferomedial type. In addition, in borderline or hypoplastic ventricles, the supporting pedicle occasionally displayed a wide insertion along the ventricular wall. The length ratio of the superolateral support was significantly different between groups (normal: 0.46±0.08; borderline: 0.39±0.07; hypoplastic: 0.36±0.1; p=0.009). No significant difference, however, was found when analysing the inferomedial type (0.42±0.09; 0.38±0.07; 0.39±0.22, p=0.39). The angle subtended between supports was also similar among groups (113°±17°; 111°±51° and 114°±57°; p=0.99). A total of eight children with borderline left ventricle underwent biventricular repair. There were no significant differentiating features for papillary muscle morphology in this subgroup.ConclusionsThe superolateral support can be shorter or absent in borderline or hypoplastic left ventricle cases. The papillary muscle pedicles in these patients often show a broad insertion. These changes have important implications on surgical options and should be described routinely.
Political institutions, lobbying and corruption
Authors: CAMPOS NAURO F. , GIOVANNONI FRANCESCO 
Published: April 2017

AbstractAlthough firms use various strategies to try to influence government policy, with lobbying and corruption chiefly among them, and political institutions play an important role in determining policy choices, very little research has been devoted to these topics. This paper tries to fill this gap. Using cross-country enterprise-level data, it investigates (1) the effect of a key political institution, namely electoral rules, on the probability that a firm engages in lobbying activities and (2) the impact of lobbying on influence, accounting for corruption and political institutions. The main conclusion is that lobbying is a significantly more effective way of generating political influence than corruption, and that electoral rules are a key mediating political institution. Our baseline estimate is that the probability of influencing government policy is 16% higher for firms that are members of lobbying groups than for those firms that are not.
Early improvement in food cravings are associated with long-term weight loss success in a large clinical sample
Authors: Dalton M , Finlayson G , Walsh B , Halseth A E , Duarte C , Blundell J E 
Published: April 2017

AbstractBackground:Food cravings are associated with dysregulated eating behaviour and obesity, and may impede successful weight loss attempts. Gaining control over food craving is therefore a component in the management of obesity. The current paper examined whether early changes in control over food craving (assessed using the Craving Control subscale on the Control of Eating Questionnaire (CoEQ)) was predictive of weight loss in four phase 3 clinical trials investigating a sustained-release combination of naltrexone/bupropion (NB) in obese adults. The underlying component structure of the CoEQ was also examined.Method:In an integrated analysis of four 56-week phase 3 clinical trials, subjects completed the CoEQ and had their body weight measured at baseline and at weeks 8, 16, 28 and 56. All analyses were conducted on subjects who had complete weight and CoEQ measurements at baseline and week 56, and had completed 56 weeks of NB (n=1310) or placebo (n=736). A latent growth curve model was used to examine whether early changes in the CoEQ subscales were associated with decreases in weight loss over time. Confirmatory factor analysis (CFA) was used to determine the psychometric properties of the CoEQ.Results:The factor structure of the CoEQ was consistent with previous findings with a four-factor solution being confirmed: Craving Control, Positive Mood, Craving for Sweet and Craving for Savoury with good internal consistency (Cronbach’sα=0.72–0.92). Subjects with the greatest improvement in Craving Control at week 8 exhibited a greater weight loss at week 56.Conclusions:These findings highlight the importance of the experience of food cravings in the treatment of obesity and support the use of the CoEQ as a psychometric tool for the measurement of food cravings in research and the pharmacological management of obesity.
The evolution of bacterial cell size: the internal diffusion-constraint hypothesis
Authors: Gallet Romain , Violle Cyrille , Fromin Nathalie , Jabbour-Zahab Roula , Enquist Brian J , Lenormand Thomas 
Published: April 2017

Abstract
Size is one of the most important biological traits influencing organismal ecology and evolution. However, we know little about the drivers of body size evolution in unicellulars. A long-term evolution experiment (Lenski’s LTEE) in which Escherichia coli adapts to a simple glucose medium has shown that not only the growth rate and the fitness of the bacterium increase over time but also its cell size. This increase in size contradicts prominent ‘external diffusion’ theory (EDC) predicting that cell size should have evolved toward smaller cells. Among several scenarios, we propose and test an alternative ‘internal diffusion-constraint’ (IDC) hypothesis for cell size evolution. A change in cell volume affects metabolite concentrations in the cytoplasm. The IDC states that a higher metabolism can be achieved by a reduction in the molecular traffic time inside of the cell, by increasing its volume. To test this hypothesis, we studied a population from the LTEE. We show that bigger cells with greater growth and CO2 production rates and lower mass-to-volume ratio were selected over time in the LTEE. These results are consistent with the IDC hypothesis. This novel hypothesis offers a promising approach for understanding the evolutionary constraints on cell size.
Mechano-regulated surface for manipulating liquid droplets
Authors: Tang Xin , Zhu Pingan , Tian Ye , Zhou Xuechang , Kong Tiantian , Wang Liqiu 
Published: April 2017

AbstractThe effective transfer of tiny liquid droplets is vital for a number of processes such as chemical and biological microassays. Inspired by the tarsi of meniscus-climbing insects, which can climb menisci by deforming the water/air interface, we developed a mechano-regulated surface consisting of a background mesh and a movable microfibre array with contrastive wettability. The adhesion of this mechano-regulated surface to liquid droplets can be reversibly switched through mechanical reconfiguration of the microfibre array. The adhesive force can be tuned by varying the number and surface chemistry of the microfibres. The in situ adhesion of the mechano-regulated surface can be used to manoeuvre micro-/nanolitre liquid droplets in a nearly loss-free manner. The mechano-regulated surface can be scaled up to handle multiple droplets in parallel. Our approach offers a miniaturized mechano-device with switchable adhesion for handling micro-/nanolitre droplets, either in air or in a fluid that is immiscible with the droplets.
Remarkable catalytic activity of dinitrogen-bridged dimolybdenum complexes bearing NHC-based PCP-pincer ligands toward nitrogen fixation
Authors: Eizawa Aya , Arashiba Kazuya , Tanaka Hiromasa , Kuriyama Shogo , Matsuo Yuki , Nakajima Kazunari , Yoshizawa Kazunari , Nishibayashi Yoshiaki 
Published: April 2017

AbstractIntensive efforts for the transformation of dinitrogen using transition metal–dinitrogen complexes as catalysts under mild reaction conditions have been made. However, limited systems have succeeded in the catalytic formation of ammonia. Here we show that newly designed and prepared dinitrogen-bridged dimolybdenum complexes bearingN-heterocyclic carbene- and phosphine-based PCP-pincer ligands [{Mo(N2)2(PCP)}2(μ-N2)] (1) work as so far the most effective catalysts towards the formation of ammonia from dinitrogen under ambient reaction conditions, where up to 230 equiv. of ammonia are produced based on the catalyst. DFT calculations on1reveal that the PCP-pincer ligand serves as not only a strongσ-donor but also aπ-acceptor. These electronic properties are responsible for a solid connection between the molybdenum centre and the pincer ligand, leading to the enhanced catalytic activity for nitrogen fixation.
Human seizures couple across spatial scales through travelling wave dynamics
Authors: Martinet L-E , Fiddyment G. , Madsen J. R. , Eskandar E. N. , Truccolo W. , Eden U. T. , Cash S. S. , Kramer M. A. 
Published: April 2017

AbstractEpilepsy—the propensity toward recurrent, unprovoked seizures—is a devastating disease affecting 65 million people worldwide. Understanding and treating this disease remains a challenge, as seizures manifest through mechanisms and features that span spatial and temporal scales. Here we address this challenge through the analysis and modelling of human brain voltage activity recorded simultaneously across microscopic and macroscopic spatial scales. We show that during seizure large-scale neural populations spanning centimetres of cortex coordinate with small neural groups spanning cortical columns, and provide evidence that rapidly propagating waves of activity underlie this increased inter-scale coupling. We develop a corresponding computational model to propose specific mechanisms—namely, the effects of an increased extracellular potassium concentration diffusing in space—that support the observed spatiotemporal dynamics. Understanding the multi-scale, spatiotemporal dynamics of human seizures—and connecting these dynamics to specific biological mechanisms—promises new insights to treat this devastating disease.