bluuebunny/crossref_metadata_2025_split huggingface dataset:
Near IR Astrometry of Magnetars
Authors: Tendulkar Shriharsh P. 
Published: March 2013

AbstractWe report on the progress of our five-year program for astrometric monitoring of magnetars using high-resolution NIR observations using the laser guide star adaptive optics (LGS-AO) supported NIRC2 camera on the 10-meter Keck telescope. We have measured the proper motion of two of the youngest magnetars, SGR 1806–20 and SGR 1900+14, which have counterparts with K ~21 mag, and have placed a preliminary upper limit on the motion of the young AXP 1E 1841–045. The precision of the proper motion measurement is at the milliarcsecond per year level. Our proper motion measurements now provide evidence to link SGR 1806–20 and SGR 1900+14 with neighboring young star clusters. At the distances of these magnetars, their proper motion corresponds to transverse space velocities of 350 ± 100 km s−1and 130 ± 30 km s−1respectively. The upper limit on the proper motion of AXP 1E 1841–045 is 160 km s−1. With the sample of proper motions available, we conclude that the kinematics of the magnetar family are not distinct from that of pulsars.
Restrictions to neutron star models based on twin-peak quasi-periodic oscillations
Authors: Török Gabriel , Urbanec Martin , Goluchová Kateřina , Bakala Pavel , Šrámková Eva , Stuchlík Zdeněk 
Published: March 2013

AbstractIn a series of works - Török et al. (2010, 2012a) and Urbanec et al. (2010a) - we explored restrictions to neutron star properties that are implied by various models of twin-peak quasi-periodic oscillations. Here we sketch an attempt to confront the obtained mass–angular-momentum relations and limits on neutron star compactness with the parameters estimated by assuming various equations of state and the spin frequency of the atoll source 4U 1636-53.
Modeling pulsar time noise with long term decay modulated by short term oscillations of the magnetic fields of neutron stars
Authors: Xie Yi , Zhang Shuangnan 
Published: March 2013

AbstractWe model the evolution of the magnetic fields of neutron stars as consisting of a long term power-law decay modulated by short term small amplitude oscillations. Our model predictions on the timing noise of neutron stars agree well with the observed statistical properties and correlations of normal radio pulsars. For individual pulsars our model can effectively reduce their timing residuals, thus offering the potential of more sensitive detections of gravitational waves with pulsar timing arrays. Finally our model can also re-produce their observed correlation and oscillations of second derivative of frenquency, as well as the “slow glitch” phenomenon.
Changes in Polarization Position Angle across the Eclipse in the Double Pulsar System
Authors: Yuen R. , Manchester R. N. , Burgay M. , Camilo F. , Kramer M. , Melrose D. B. , Stairs I. H. 
Published: March 2013

AbstractWe investigate the changes in polarization position angle in radiation from pulsar A around the eclipse in the Double Pulsar system PSR J0737-3039A/B at the 20 cm and 50 cm wavelengths using the Parkes 64-m radio telescope. The changes are ~ 2σ during and shortly after the eclipse at 20 cm but less significant at 50 cm. We show that the changes in position angle during the eclipse can be modelled by differential synchrotron absorption in the eclipse regions. Position angle changes after the eclipse are interpreted as Faraday rotation in the magnetotail of pulsar B. Implied charge densities are consistent with the Goldreich-Julian density, suggesting that the particle energies in the magnetotail are mildly relativistic.
Questions on accreting mass and minimum magnetic field of millisecond pulsars
Authors: Zhang C. M. 
Published: March 2013

AbstractAbout 0.2 solar mass is absorbed by the millisecond pulsar (MSP) at the binary accretion phase, while the polar magnetic field of MSP is diluted to a magnitude of order 108.5 Gauss, which is proportionally related to the mass accretion rate. It is found that the minimum magnetic field of MSP can be as low as 107 Gauss if the accretion rate of the binary system reaches its the minimum value of 1015 g/s. This bottom field has nothing to do with the MSP initial field. Some questions on MPSs are proposed and answered.
Drug and Disease Model Resources: A Consortium to Create Standards and Tools to Enhance Model‐Based Drug Development
Authors: Harnisch L , Matthews I , Chard J , Karlsson MO 
Published: March 2013

Model‐based drug development (MBDD) is accepted as a vital approach in understanding patients’ drug‐related benefit and risk by integrating quantitative information integration from diverse sources collected throughout drug development.1 This perspective introduces the activities of the Drug and Disease Model Resources (DDMoRe) consortium, founded in 2011 through the Innovative Medicines Initiative Joint Undertaking (IMI‐JU)2 as a European public–private partnership to address a lack of common tools, languages, and standards for modeling and simulation (M&S) to improve model‐based knowledge integration.CPT: Pharmacometrics & Systems Pharmacology (2013) 2, e34; doi:10.1038/psp.2013.10; advance online publication 20 March 2013
Adolescent–parent attachment as a mediator of relations between parenting and adolescent social behavior and wellbeing in China
Authors: Cai Mengfei , Hardy Sam A. , Olsen Joseph A. , Nelson David A. , Yamawaki Niwako 
Published: March 2013

The purpose of this study was to examine links between parenting dimensions (authoritative parenting, psychological control, and parental authority) and adolescent wellbeing (self‐esteem, autonomy, and peer attachments) as mediated by parent–teen attachment, among Chinese families. The sample included 298 Chinese adolescents, ages 15–18 years (M age = 16.36, SD = .68; 60% female). The mediation model was examined using path analyses (one model with parental authority as overprotection, and one with it as perceived behavioral control). To improve model fit a direct path was added from authoritative parenting to autonomy. Authoritative parenting was positively predictive of attachment, while psychological control and overprotection (but not behavioral control) were negative predictors. In turn, adolescent–parent attachment was positively related to the three outcomes. Lastly, the model paths did not differ by adolescent gender. These findings suggest that parenting behaviors may play a crucial role in adolescent social behaviors and wellbeing via adolescent–parent attachment.
Parametric Bayesian priors and better choice of negative examples improve protein function prediction
Authors: Youngs Noah , Penfold-Brown Duncan , Drew Kevin , Shasha Dennis , Bonneau Richard 
Published: March 2013

Abstract
Motivation: Computational biologists have demonstrated the utility of using machine learning methods to predict protein function from an integration of multiple genome-wide data types. Yet, even the best performing function prediction algorithms rely on heuristics for important components of the algorithm, such as choosing negative examples (proteins without a given function) or determining key parameters. The improper choice of negative examples, in particular, can hamper the accuracy of protein function prediction.
Results: We present a novel approach for choosing negative examples, using a parameterizable Bayesian prior computed from all observed annotation data, which also generates priors used during function prediction. We incorporate this new method into the GeneMANIA function prediction algorithm and demonstrate improved accuracy of our algorithm over current top-performing function prediction methods on the yeast and mouse proteomes across all metrics tested.
Availability: Code and Data are available at: http://bonneaulab.bio.nyu.edu/funcprop.html
Contact: shasha@courant.nyu.edu or bonneau@cs.nyu.edu
Supplementary information: Supplementary data are available at Bioinformatics online.
Formation of the Unusual Semivolatile Diterpene Rhizathalene by the Arabidopsis Class I Terpene Synthase TPS08 in the Root Stele Is Involved in Defense against Belowground Herbivory
Authors: Vaughan Martha M. , Wang Qiang , Webster Francis X. , Kiemle Dave , Hong Young J. , Tantillo Dean J. , Coates Robert M. , Wray Austin T. , Askew Whitnee , O’Donnell Christopher , Tokuhisa James G. , Tholl Dorothea 
Published: March 2013

Abstract
Secondary metabolites are major constituents of plant defense against herbivore attack. Relatively little is known about the cell type–specific formation and antiherbivore activities of secondary compounds in roots despite the substantial impact of root herbivory on plant performance and fitness. Here, we describe the constitutive formation of semivolatile diterpenes called rhizathalenes by the class I terpene synthase (TPS) 08 in roots of Arabidopsis thaliana. The primary enzymatic product of TPS08, rhizathalene A, which is produced from the substrate all-trans geranylgeranyl diphosphate, represents a so far unidentified class of tricyclic diterpene carbon skeletons with an unusual tricyclic spiro-hydrindane structure. Protein targeting and administration of stable isotope precursors indicate that rhizathalenes are biosynthesized in root leucoplasts. TPS08 expression is largely localized to the root stele, suggesting a centric and gradual release of its diterpene products into the peripheral root cell layers. We demonstrate that roots of Arabidopsis tps08 mutant plants, grown aeroponically and in potting substrate, are more susceptible to herbivory by the opportunistic root herbivore fungus gnat (Bradysia spp) and suffer substantial removal of peripheral tissue at larval feeding sites. Our work provides evidence for the in vivo role of semivolatile diterpene metabolites as local antifeedants in belowground direct defense against root-feeding insects.
Mapping the Signal Peptide Binding and Oligomer Contact Sites of the Core Subunit of the Pea Twin Arginine Protein Translocase
Authors: Ma Xianyue , Cline Kenneth 
Published: March 2013

Abstract
Twin arginine translocation (Tat) systems of thylakoid and bacterial membranes transport folded proteins using the proton gradient as the sole energy source. Tat substrates have hydrophobic signal peptides with an essential twin arginine (RR) recognition motif. The multispanning cpTatC plays a central role in Tat operation: It binds the signal peptide, directs translocase assembly, and may facilitate translocation. An in vitro assay with pea (Pisum sativum) chloroplasts was developed to conduct mutagenesis and analysis of cpTatC functions. Ala scanning mutagenesis identified mutants defective in substrate binding and receptor complex assembly. Mutations in the N terminus (S1) and first stromal loop (S2) caused specific defects in signal peptide recognition. Cys matching between substrate and imported cpTatC confirmed that S1 and S2 directly and specifically bind the RR proximal region of the signal peptide. Mutations in four lumen-proximal regions of cpTatC were defective in receptor complex assembly. Copurification and Cys matching analyses suggest that several of the lumen proximal regions may be important for cpTatC–cpTatC interactions. Surprisingly, RR binding domains of adjacent cpTatCs directed strong cpTatC-cpTatC cross-linking. This suggests clustering of binding sites on the multivalent receptor complex and explains the ability of Tat to transport cross-linked multimers. Transport of substrate proteins cross-linked to the signal peptide binding site tentatively identified mutants impaired in the translocation step.
The Arabidopsis YELLOW STRIPE LIKE4 and 6 Transporters Control Iron Release from the Chloroplast
Authors: Divol Fanchon , Couch Daniel , Conéjéro Geneviève , Roschzttardtz Hannetz , Mari Stéphane , Curie Catherine 
Published: March 2013

Abstract
In most plant cell types, the chloroplast represents the largest sink for iron, which is both essential for chloroplast metabolism and prone to cause oxidative damage. Here, we show that to buffer the potentially harmful effects of iron, besides ferritins for storage, the chloroplast is equipped with specific iron transporters that respond to iron toxicity by removing iron from the chloroplast. We describe two transporters of the YELLOW STRIPE1-LIKE family from Arabidopsis thaliana, YSL4 and YSL6, which are likely to fulfill this function. Knocking out both YSL4 and YSL6 greatly reduces the plant's ability to cope with excess iron. Biochemical and immunolocalization analyses showed that YSL6 resides in the chloroplast envelope. Elemental analysis and histochemical staining indicate that iron is trapped in the chloroplasts of the ysl4 ysl6 double mutants, which also accumulate ferritins. Also, vacuolar iron remobilization and NRAMP3/4 expression are inhibited. Furthermore, ubiquitous expression of YSL4 or YSL6 dramatically reduces plant tolerance to iron deficiency and decreases chloroplastic iron content. These data demonstrate a fundamental role for YSL4 and YSL6 in managing chloroplastic iron. YSL4 and YSL6 expression patterns support their physiological role in detoxifying iron during plastid dedifferentiation occurring in embryogenesis and senescence.
Modelling and optimization of fully flexible assembly systems (F‐FAS)
Authors: Rosati Giulio , Faccio Maurizio , Finetto Christian , Carli Andrea 
Published: March 2013

PurposeThe paper aims to address the modelling and optimization of fully flexible assembly systems (F‐FAS), a new concept in flexible automation recently introduced by the authors.Design/methodology/approachThe paper presents a mathematical model of the F‐FAS, which makes it possible to predict its efficiency, throughput and unit direct production costs, correlating such values with system and production variables. The mathematical model proposed in the paper was derived from experimental and simulation data, which were analysed for a wide range of different productions and system settings.FindingsCorrelation analysis revealed that there are three main determinants of the efficiency of the F‐FAS: the number of components (types of parts) used to assemble the models (production variable); the average complexity of the models to be assembled (production variable); the ratio of the average perimeter of components (production variable) over a significant dimension of the working plane (system variable). Such parameters makes it possible to estimate the maximum attainable efficiency of the F‐FAS, and to calculate the optimal setting of the feeder which makes it possible to obtain such efficiency during the execution of the whole production order.Originality/valueThe model presented in the paper makes it possible to quantify in advance the real potential of the F‐FAS, according to the characteristics of the production mix and type of components to be assembled. By using the methodologies presented in the paper, one can first evaluate the convenience of the F‐FAS approach with respect to traditional FAS technology and manual assembly, then identify the optimal design and settings of the F‐FAS, according to the needs of a specific application. As a result, not only can the investment on the automated assembly system be accurately evaluated in advance, but also the return on investment can be maximized.
Heritage protection in England: the New Labour legacy
Authors: Mansfield John R. 
Published: March 2013

PurposeThe purpose of this paper is to examine the New Labour governments’ approach to amending the regime for the protection of heritage assets in England.Design/methodology/approachThe paper critically reviews New Labour policy documents alongside contemporary research‐based literature.FindingsThe terms heritage, conservation and sustainability are increasingly regarded as synonyms. While providing initiatives for the built heritage, New Labour urban policy was set in the context of domestic economic and political restructuring and increased international environmental awareness. This has made managing the heritage environment at both national and local levels more challenging, an aspect that has been exacerbated by the New Labour government's introduction of performance targets and new operational languages.Originality/valueThe paper offers an applied consideration of three specific aspects of recent heritage protection direction.
Facilities management service and customer satisfaction in shopping mall sector
Authors: Hui Eddie C.M. , Zhang Pei‐hua , Zheng Xian 
Published: March 2013

PurposeThe purpose of this paper is to identify and analyze crucial facilities management (FM) service dimensions that affect customer satisfaction with regards to the shopping mall sector, and provide useful implications for FM companies.Design/methodology/approachThe study is based on a five‐year longitudinal customer satisfaction survey conducted in five selected shopping malls in Hong Kong. The authors first use stepwise multiple regression method to estimate the relationship between overall customer satisfaction level and nine specific dimensions of FM service for each year, and then compare regression results of five years to identify crucial dimensions.FindingsThe research reveals that: management and maintenance of communal facilities is the most crucial dimension with regard to the overall customer satisfaction; the condition of a washroom is another important dimension for customer satisfaction; communication efficiency and efficacious promotion events are also important for maintaining customer satisfaction.Originality/valueThis paper presents a longitudinal quantitative survey regarding shopping mall FM service satisfaction and identifies several critical dimensions affecting customer satisfaction, which deliver useful information for FM managers who intend to fulfil customer expectations.
Social enterprise applications in an urban facilities management setting
Authors: Uzairiah Mohd Tobi Siti , Amaratunga Dilanthi , Mohd Noor Nazali 
Published: March 2013

PurposeThe paper seeks to build a theoretical argument on social enterprise applications in an urban facilities management (urban FM) setting, by exploring the concepts of urban FM and its underlying philosophy.Design/methodology/approachThe paper is based on an extensive literature review within and around the concept of urban FM and its relationship with social enterprise principles, forming a basis for further research in this area.FindingsUrban FM could be used as a mechanism to develop the sustainable design and management of community facilities operations by taking social enterprise as an approach to seek a new service delivery model.Research limitations/implicationsThere is limited literature relating to urban FM, and it is one of the new critical alignments in FM that is waiting to be explored further. However, within this new exploration of urban FM knowledge, the paper considers a sustainable way of managing community facilities, raising important social implications for the FM industry,Originality/valueThe paper argues that the concept of urban FM and social enterprise principles can be applied in their relationship towards managing community facilities in a sustainable way.
Towards a project alliance value for money framework
Authors: MacDonald Charles , Walker Derek H.T. , Moussa Neveen 
Published: March 2013

PurposeThis paper aims to present and describe a value for money framework that can be used on alliance projects to improve the consideration of, and reporting of, value for money.Design/methodology/approachDevelopment of the framework used a combination of interviews with domain experts, reflection on practice and a Delphi panel to develop and refine a value for money/best value outcome framework for alliance projects.FindingsThe results indicate that a robust framework for demonstrating value for money in an alliance project is feasible, and a framework was developed and tested through the Delphi panel.Research limitations/implicationsThe paper briefly describes the research approach but focuses on the outcome rather than the process.Practical implicationsThe research aim of this paper is to expand the conceptual view and to illustrate how a practical assessment of value for money in project alliancing can be achieved. It presents the framework and describes it in sufficient detail for readers to be able to adopt and adapt it.Social implicationsValue for money in infrastructure projects has profound implications for society; this extends and enhances techniques used to assure value for money.Originality/valueThe paper provides a value for money framework across the whole project design to delivery cycle.
The dual promise of green jobs
Authors: Scully-Russ Ellen 
Published: March 2013

Purpose
– The aim of this paper is to review the policy literature on green jobs and green jobs training in the USA and to present findings of a qualitative study on the start-up of two Energy Training Partnerships (ETP) funded by the US Department of Labour to train workers for green jobs.

Design/methodology/approach
– The paper includes a review of the policy literature, document reviews, and interviews with administrators, employers, educators, workforce officials. The literature presumes green jobs training will help create jobs and that these jobs will provide opportunities for the poor. This study examined these propositions within the context of the ETPs.

Findings
– Stakeholders faced challenges related to a misaligned infrastructure, lack of synchronization in the labour market, and workforce gaps. They responded by coordinating available resources in innovative ways. Though many policy propositions were confirmed, the premise that green jobs are a pathway of poverty was not. Entry requirements were high and programmes lacked funds for long-term education.

Research limitations/implications
– Because the sample was small and little was known about the nature of emerging jobs, more research is needed on green jobs and their skill requirements.

Practical implications
– The study found that coordination on the policy and programme levels helped stakeholders respond to challenges. Also, new opportunities for the poor may be realized by embedding short-term training in a broad continuum of education and strategically linking both to economic development activities.

Originality/value
– Little is known about how training aligns with emerging industries. This study helped fill this gap by examining how stakeholders responded to the demands of the green sector.