bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prevalence and risk factors of postnatal depression among women attending antenatal courses
Authors: Piacentini Daniele , Leveni Daniela , Primerano Giuseppe , Cattaneo Marina , Volpi Loredana , Biffi Giuseppe , Mirabella Fiorino 
Published: April 2019

SUMMARYAims – Postnatal depression, the most frequent complication occurring after pregnancy, is often not recognized. The prevalence of postnatal depression is currently considered to be 10–15% in western countries. A wide range of risk factors related to postnatal depression were researched in international studies. Our aim was to evaluate the risk factors and their frequency in a women population of Bergamo Province and compare the results with findings of international literature. Methods – 595 women taking part to antenatal courses in three hospitals in Bergamo Province were screened for Postnatal Depression using EPDS and clinical interview. Prevalence and possible psychosocial risk factors data were collected and subsequently analysed and compared with literature findings. Results – Thirty six (7.1%) women of our sample had postnatal depression. Depressed mood and depression during pregnancy, anxiety during pregnancy, poor social support, recent life events, a history of depression or other psychiatric history, presence of maternity blues were the strongest predictors of postnatal depression in our sample. Conclusions – The Psychosocial risk factors emerged from our study are substantially the same indicated by international studies, on the contrary prevalence is a little lower. This result may be explained considering that our women sample wasn't completely representative of general population.Declaration of Interest: Results of this study are part of a project, “Identification and early treatment of post partum depression”, approved and financially supported by Regione Lombardia. This study didn't receive grants or support from drug companies. There are no conflicts of interest.
Stressful and intrusive life events preceding first episode psychosis
Authors: Raune David , Kuipers Elizabeth , Bebbington Paul 
Published: April 2019

SUMMARYAim – To test the hypothesis that stressful life events, in particular intrusive events, would cluster before the first onset of psychosis. Method – Forty-one patients with first episode psychosis were interviewed with the Life Events and Difficulties Schedule to assess events in the year before the onset of illness. Events were rated contextually on timing, independence, threat, and intrusiveness. Within-patient group clustering was evaluated, and the patient group was compared with two general population surveys from London. Results – Events were very frequent in the year before the onset of psychosis. Stressful and intrusive events were more common in the three months before onset compared with the previous nine months, although few analyses reached conventional statistical significance. Threatening and intrusive events were much more frequent in patients than in the comparison groups. First episode psychosis patients were strikingly more likely to report an intrusive event in the three months before onset (OR=17.1, 34% v 3%), and also showed an excess between three months and one year before onset (OR=8.1, 11% v 3%). Conclusions – Events may trigger many cases of first episode psychosis. The effect emerges several months before onset, particularly if the events are intrusive. This has both theoretical and clinical implications.Declaration of Interest: DR was supported by a UK Medical Research Council studentship. The authors have no conflicts of interest in writing this paper.
Cost-effectiveness of nidotherapy for comorbid personality disorder and severe mental illness: randomized controlled trial
Authors: Ranger Maja , Tyrer Peter , Miloseska Katerina , Fourie Hannalie , Khaleel Ibrahim , North Bernard , Barrett Barbara 
Published: April 2019

SummaryAims – Nidotherapy is the systematic modification of the environment to create a better fit for people. This is the first randomized controlled trial of its efficacy in an assertive community team. Methods – Patients in an assertive outreach team with continued management problems together with comorbid personality disturbance and severe mental illness were randomized to nidotherapy enhanced assertive treatment (up to 12 sessions) or to continued assertive outreach care. Use of psychiatric beds over one years (primary outcome) and change from base-line in other health service resources, psychiatric symptoms, social functioning and engagement with services were measured at 6 and 12 months (secondary outcomes). Results – 52 patients were recruited over 13 months, with 49 and 37 assessed at 6 and 12 months. Patients referred to nidotherapy had a 63% reduction in hospital bed use after one year compared with control assertive care (P=0.13) and showed non-significant improvement in psychiatric symptoms, social functioning and engagement than the control group. The mean cost savings for each patient allocated to nidotherapy was £4,112 per year, mainly as a consequence of reduced psychiatric bed use. Conclusion – Nidotherapy may be a cost-effective option in the management of comorbid serious mental illness and personality disorder, but larger confirmatory trials are necessary.
Use of mental health services and unmet needs for socially-at-risk. Spanish children and adolescents
Authors: Ezpeleta Lourdes , Granero Roser , Osa Núria de la , Domènech Josep M. 
Published: April 2019

AbstractReported one-year prevalence of service use due to mental disorders in children and adolescents from the general population varies according to country, organization of services, and services considered. Among factors associated with use of services, the literature lists parental and school personnel's perception of problems, having a psychiatric diagnosis (especially externalizing), symptom severity, comorbid disorders, functional impairment, family burden, family environment or being a boy (Cabiya et al., 2006; Farmer et al., 2003; Sayal, 2004). A better understanding of these factors may help to optimize access to services of children needing help.
AN IDENTITY OF PARABOLIC KAZHDAN–LUSZTIG POLYNOMIALS ARISING FROM SQUARE-IRREDUCIBLE MODULES
Authors: GUREVICH MAXIM 
Published: April 2019

AbstractWe show a precise formula, in the form of a monomial, for certain families of parabolic Kazhdan–Lusztig polynomials of the symmetric group. The proof stems from results of Lapid–Mínguez on irreducibility of products in the Bernstein–Zelevinski ring. By quantizing those results into a statement on quantum groups and their canonical bases, we obtain identities of coefficients of certain transition matrices that relate Kazhdan–Lusztig polynomials to their parabolic analogues. This affirms some basic cases of conjectures raised recently by Lapid.
Unfolding the Fan of Memory in Arthur Lourié’s Recollection of Petersburg
Authors: SALKOWSKI DAVID 
Published: April 2019

AbstractThis article demonstrates how migration formed a process of memory construction in the work and thought of Russian émigré composer Arthur Lourié (1891–1966). It analyses Lourié’s song cycle Recollection of Petersburg, composed over two decades and across four countries, providing close readings of music and poetry and exploring the network of intertextual connections the cycle activates. Lourié has proven a difficult subject because of the diversity of aesthetic positions he took from decade to decade. Recollection allows us to trace a line of continuity as he passed through these incarnations, revealing an aesthetics of accumulation and arrangement with origins in Acmeist poetics. This aesthetics, in turn, served as a coping strategy for Lourié’s life in emigration, as he sought to order the voices of memory and escape the flow of time. Lourié’s case will contribute to our understanding of the profound impact of migration on music in the twentieth century.
Elliott Carter's and Luigi Nono's Analyses of Schoenberg'sVariations for Orchestra, Op. 31: Divergent Approaches to Serialism
Authors: EMMERY LAURA 
Published: April 2019

AbstractDespite Nono's and Carter's opposing views, divergent compositional aesthetic, and applicability of twelve-tone music, the two composers shared their admiration for the works of the Second Viennese School. In this article, I examine Carter's 1957 and Nono's 1956 analyses of Schoenberg's pivotal twelve-tone work:Variations for Orchestra, Op. 31 (1926–28). The study offers a rare opportunity to look at the same piece analysed by two composers with unique points of view. Completed only a year apart, the analyses illuminate aspects of Schoenberg's work that each composer found most compelling and applicable to their own works. Thus, these analyses, combined with sketches housed at the Paul Sacher Stiftung (Basel), the Library of Congress (Washington, DC), and the Fondazione Archivio Luigi Nono (Venice), not only shed light on Schoenberg's system, but also become a valuable tool for tracking both Carter's and Nono's compositional processes, showing how Schoenberg influenced two schools of thought.
Prototype testing of a composite-type active grating bender with Si substrate for surface profile high-order term elimination
Authors: Tseng T.-C. , Perng S.-Y. , Fung H.-S. , Lin S.-W. , Syu J.-C. , Hsu K.-H. , Chen C.-T. 
Published: April 2019

The previous monolithic active grating bender design met some basic design requirements. However, after a real grating (BM-AGM) had been fabricated and installed for testing, the results showed that the usable length is a mere 60 mm because of the higher-order term error in the surface profile. A method was thus derived to eliminate the higher-order term error by modifying the width of the bender substrate through finite-element method simulation, reducing the residual error from about 100 nm to 6 nm. Owing to the closure of the grating department of Zeiss, ruling the monolithic bender is no longer available and the design has to be modified to a composite-type bender with Si substrate. A prototype was fabricated and assembled to examine all the design situations. The surface roughness of the width-modified Si substrate is around 30 nm before assembly. The residual error after assembly and bending is less than 10 nm. It proves that the design is feasible. However, due to the manufacturing capacity of the vendor, a short-length substrate is required and the design has to be modified. The detailed design modification and testing results are presented in this paper.
Numerical Modeling of Weathering, Erosion, Sedimentation, and Uplift in a Triple Junction Divergent Margin
Authors: Sacek Victor , de Morais Neto João Marinho , Vasconcelos Paulo Marcos , de Oliveira Carmo Isabela 
Published: April 2019

AbstractThe majority of numerical models of landscape evolution in divergent margins are focused on the simulation of margins with simplified lithological control on landscape erosion. However, this approach is insufficient to study the evolution of margins where chemical weathering is an important element increasing rock resistance to physical erosion. One example of this margin is the Borborema Province, northeastern Brazil, where postrift marine sediments are now preserved at elevations ∼700–800 m in up to 1‐km‐high plateaus capped by duricrust layers. The landscape evolution of these uplifted sedimentary basins still eludes explanation. Here we use numerical models that couple weathering, erosion, sedimentation, sea level changes, flexural isostasy, and thermal effects due to lithospheric stretching to simulate the tectonosedimentary evolution of the Borborema Province since the onset of continental stretching during the Lower Cretaceous. These numerical experiments reveal that nearly 70% of the postrift regional uplift observed in the Borborema Province can be explained by differential denudation of the continent and flexural rebound of the lithosphere. The remaining ∼250 m of uplift can be explained by thermal uplift induced by partial erosion of the base of the continental lithosphere under the Borborema Province due to edge‐driven convection, in accordance with the anomalously thin continental lithosphere observed under the Borborema Province. Additionally, the numerical results can explain the regional pattern of fission track ages by the combined effect of differential denudation and flexural rebound in this geometrically complex margin.
Seismic Spectral Ratios Between North Korean Nuclear Tests: Implications for Their Seismic Sources
Authors: Jin P. , Zhu H. F. , Xu X. , Wang P. Z. , Li X. , Shen X. F. 
Published: April 2019

AbstractSeismic spectral ratios between the 3 September 2017 North Korean nuclear test (NKT2017) and four earlier Korean tests (25 May 2009, NKT2009; 12 February 2013, NKT2013; 6 January 20016, NKT2016J; and 9 September 2016, NKT2016S) are investigated. All the observed teleseismicPwave spectral ratios exhibit a unique notch at approximately 2.5 Hz, but it is not observed for spectral ratios of regionalPandLgwaves. Meanwhile, for a given event pair, the network‐averagedLgwave spectral ratio is similar to that of regionalPwave, but with the explosions' source corner frequencies significantly reduced, supporting the conjecture by Fisk (2006,https://doi.org/10.1785/0120060023). We demonstrated that the observed notch of teleseismicPwave spectral ratios may be well modeled with interference betweenpPandPwaves with an apparentpP‐Ptime delay ΔtpPof about 0.4 s for NKT2017, while regionalPwave spectral ratios may be well fitted with source spectral ratios predicted by classical explosion source models including Mueller and Murphy (1971,https://doi.org/10.2172/4107998) (MM71), Denny and Johnson (1991,https://doi.org/10.1029/gm065p0001) (DJ91), and their two hybrids. Via the above modeling, yield sizes of the explosions and the depth of burials of NKT2009–2016S are determined as functions of NKT2017's buried depthh0. Our result indicate that, forh0in the range of 600–1,100 m, the MM71‐related models give yield estimations about 100–300 kt for NKT2017, 3–7 kt for NKT2009, 6–15 kt for NKT2013 and NKT2016J, and 10–25 kt for NKT2016S, while yield sizes obtained by model DJ91 are much smaller. Nevertheless, for all the above source models, the obtained depths of burial estimations of NKT2009–2016S are always significantly smaller than NKT2017's depth of burialh0.
Anomalous refraction and reflection characteristics of bend V-shaped antenna metasurfaces
Authors: Xie Yanqiang , Yang Chang , Wang Yun , Shen Yun , Deng Xiaohua , Zhou Binbin , Cao Juncheng 
Published: April 2019

AbstractStabilization issue of anomalous refraction and reflection in V-shaped antenna metasurfaces are investigated. Specifically, when a V-shaped metasurface is artificially tilted, the induced refraction and reflection are theoretically analyzed. Detailed numerical and experimental study is then performed for the upward and downward bending metasurfaces. Our results show that although the anomalous reflection is sensitive to the deformation of metasurface geometry; the anomalous refraction is, surprisingly, barely affected by relatively small-angle tilting and able to support perfect beam orienting. Since in real-world applications, the optical objects are often affected by multiple uncertain factors, such as deformation, vibration, non-standard surface, non-perfect planar, etc., the stabilization of optical functionality has therefore been a long-standing design challenge for optical engineering. We believe our findings can shed new light on this stability issue.
A phytic acid derived LiMn0.5Fe0.5PO4/Carbon composite of high energy density for lithium rechargeable batteries
Authors: Meng Yan , Wang Yujue , Zhang Zhaokun , Chen Xiaojuan , Guo Yong , Xiao Dan 
Published: April 2019

AbstractA composite of olivine lithium manganese iron phosphate (LiMn0.5Fe0.5PO4), external carbon coating and internal embedded carbon flakes, EC-IC-LMFP, is prepared by using phytic acid (PhyA) as phosphorus source via solvothermal process followed by calcination. The composite with improved electronic conductivity and ion diffusivity presents an ultrahigh reversible specific capacity of 193 mAh g−1 at 0.1 C, and an excellent cycling stability of 93% capacity retention after 100 cycles at 1 C when applied as a cathode material for Li-ion batteries (LIBs). Additionally, the composite fine powders exhibit a special microstructure and its volumetric energy density is estimated to reach 1605 Wh L−1, much larger than the commercial LiFePO4.
Morphology of the tentorium in the ant genus Lasius Fabricius (Hymenoptera: Formicidae)
Authors: Kubota Hiroshi , Yoshimura Jin , Niitsu Shuhei , Shimizu Akira 
Published: April 2019

AbstractThe tentorium is the internal skeleton of the head capsule of insects. Several studies have shown that the structure of the tentorium is an important factor not only for the morphology and systematics but also for the phylogeny and evolution. In ants, however, only three studies have reported tentorial morphology so far. We reveal the fundamental structure of the tentorium of the genus Lasius (Hymenoptera, Formicidae) and its minor variation among six species of the genus. Based on the results, we give new terminologies of the organ, presenting a schematic diagram of the tentorium. We clarify muscle attachment to the tentorium by constructing a three-dimension image of the tentorium and muscles. We then verify the attachment areas of the antennal muscles and maxillary adductor muscles on the tentorium. The results show that the muscular attachment areas are broader than previously thought. Our study indicates that the key to understanding the evolution of the tentorium is its functional morphology, in relation to the attachments of the muscles originating from the tentorium within the head capsule. This is the first report of the three-dimensional images of the ant tentorium and its attached muscles. The intra- and inter-specific variations of the tentorium is also reported for the first time.
Transient receptor potential vanilloid 4 mediates sour taste sensing via type III taste cell differentiation
Authors: Matsumoto Kenjiro , Ohishi Akihiro , Iwatsuki Ken , Yamazaki Kaho , Takayanagi Satoko , Tsuji Masahiro , Aihara Eitaro , Utsumi Daichi , Tsukahara Takuya , Tominaga Makoto , Nagasawa Kazuki , Kato Shinichi 
Published: April 2019

AbstractTaste buds are comprised of taste cells, which are classified into types I to IV. Transient receptor potential (TRP) channels play a significant role in taste perception. TRP vanilloid 4 (TRPV4) is a non-selective cation channel that responds to mechanical, thermal, and chemical stimuli. The present study aimed to define the function and expression of TRPV4 in taste buds using Trpv4-deficient mice. In circumvallate papillae, TRPV4 colocalized with a type IV cell and epithelial cell marker but not type I, II, or III markers. Behavioural studies showed that Trpv4 deficiency reduced sensitivity to sourness but not to sweet, umami, salty, and bitter tastes. Trpv4 deficiency significantly reduced the expression of type III cells compared with that in wild type (WT) mice in vivo and in taste bud organoid experiments. Trpv4 deficiency also significantly reduced Ki67-positive cells and β-catenin expression compared with those in WT circumvallate papillae. Together, the present results suggest that TRPV4 contributes to sour taste sensing by regulating type III taste cell differentiation in mice.
A Scoping Review of the Involvement of Children's Communication Partners in Aided Augmentative and Alternative Communication Modeling Interventions
Authors: Biggs Elizabeth E. , Carter Erik W. , Gilson Carly B. 
Published: April 2019

Purpose
The purpose of this study was to inform practice and research by identifying and synthesizing research on interventions in which natural communication partners implemented aided augmentative and alternative communication (AAC) modeling strategies.

Method
A scoping review yielded 29 studies. Data were charted related to participant characteristics, intervention characteristics, partner instruction and assessment, and partner perspectives of social validity.

Results
More than 157 peer and 100 adult communication partners (e.g., parents, special educators, paraprofessionals) implemented aided AAC modeling strategies within included studies. To teach communication partners intervention strategies, researchers frequently reported using (a) oral instruction, (b) modeling, and (c) practice or application opportunities with performance feedback. Partner instruction frequently involved both training and concurrent support (e.g., coaching, facilitation, consultation, follow-up support).

Conclusion
Findings from this review inform the design and delivery of aided AAC modeling interventions by children's natural communication partners. Findings also highlight important avenues for enhancing the rigor of future research on interventions involving aided AAC modeling, including the quality of reporting and application of principles from implementation science.

Supplemental Material

https://doi.org/10.23641/asha.8038505
Minimising torque ripple of SRM by applying DB‐DTFC
Authors: Zhang Wen , Xu Ai'de , Han Lele , Wang Shenghao 
Published: April 2019

Since the traditional direct torque control (DTC) of switched reluctance motors (SRMs) has the shortcomings of large torque ripple and non‐constant switching frequency, this study proposes the deadbeat‐direct torque and flux‐linkage control (DB‐DTFC) method for SRM. By analysing the basic principles of SRM, a discrete‐time model is established to predict the future states of the SRM drive system. With DB‐DTFC, the stator flux and torque can be manipulated during each pulse‐width modulation cycle to minimise torque ripple during operation. As a result, the proposed DB‐DTFC can minimise the torque ripple as well as apply space‐vector modulation with a constant switching frequency. Finally, to verify its effectiveness, DB‐DTFC was applied to the 15 kW three‐phase 12/8‐pole SRM test bench in real time and the results are compared with conventional DTC.
Expanding associations in the Vela-Puppis region
Authors: Cantat-Gaudin T. , Jordi C. , Wright N. J. , Armstrong J. J. , Vallenari A. , Balaguer-Núñez L. , Ramos P. , Bossini D. , Padoan P. , Pelkonen V. M. , Mapelli M. , Jeffries R. D. 
Published: April 2019

Context. The Vela-Puppis region is known to host the Vela OB2 association as well as several young clusters featuring OB and pre-main-sequence stars. Several spatial and kinematic subgroups have been identified in recent years.Aims. By grouping stars based on their positions and velocity, we can address the question of the dynamical history of the region and the mechanisms that drove stellar formation. TheGaiaDR2 astrometry and photometry enables us to characterise the 3D spatial and 3D kinematic distribution of young stars and to estimate the ages of the identified components.Methods. We used an unsupervised classification method to group stars based on their proper motions and parallax. We studied the expansion rates of the different identified groups based on 3D velocities and on corrected tangential velocities. We used theoretical isochrones to estimate ages.Results. The young stars can be separated into seven main groups of different ages and kinematical distribution. All groups are found to be expanding, although the expansion is mostly not isotropic.Conclusions. The size of the region, the age substructure, and the anisotropic expansion rates are compatible with a prolonged period of star formation in a turbulent molecular cloud. The current kinematics of the stars cannot be explained by internal processes alone (such as gas expulsion).