bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dreaming partnership, enabling inequality: administrative infrastructure in global health science
Authors: Crane Johanna T. 
Published: March 2020

AbstractThis article examines the fiscal and administrative infrastructures underpinning global health research partnerships between the US and Uganda, and the power dynamics they entail. Science studies scholars and anthropologists have argued for the importance of studying so-called ‘boring things’ – standards, bureaucracies, routinization, codes and databases, for example – as a way to bring to the surface the assumptions and power relations that often lie embedded within them. This article focuses on fiscal administration as an understudied ethnographic object within the anthropology of global health. The first part of the article is a case study of the fiscal administration of a US–Uganda research partnership. The second part describes the institutionalization of some of the administrative norms and practices used by this partnership within the ‘global health enabling systems’ employed by US universities working in Uganda and elsewhere in Africa. I analyse a case study and ‘enabling systems’ to show how these administrative strategies create parallel infrastructures that avoid direct partnership with Ugandan public institutions and may facilitate the outsourcing of legal and financial risks inherent in international partnerships to Ugandan collaborators. In this way, these strategies act todisablerather thanenable(or build) Ugandan research and institutional capacity, and have profound implications for African institutions as well as for the dream of ‘real partnership’ in global health.
Apartheid South Africa's segregated legal field: black lawyers and the Bantustans
Authors: Gibbs Timothy 
Published: March 2020

AbstractThe history of South Africa's urban-based ‘struggle lawyers’ – a trajectory epitomized by Nelson Mandela – is much discussed by historians and biographers, reflecting a broader vein of historiography that celebrates anti-colonial legal activism. However, it was South Africa's ‘Native Reserves’ and Bantustans that produced the majority of African lawyers for much of the twentieth century. Indeed, two-thirds of the African justices who have sat on the post-apartheid Constitutional Court either practised or trained in the Bantustans during the apartheid era. The purpose of this article is thus to reappraise South Africa's ‘legal field’ – the complex relationship between professional formation, elite reproduction and the exercise of political power – by tracing the ambiguous role played by the Native Reserves/Bantustans in shaping the African legal profession across the twentieth century. How did African lawyers, persistently marginalized by century-long patterns of exclusion, nevertheless construct an elite profession within the confines of segregation and apartheid? How might we link the histories of the Bantustans with the better-known ‘struggle historiography’ that emphasizes the role of political and legal activism in the cities? And what are the implications of South Africa's segregated history for debates about the ‘decolonization’ of the legal profession in the post-apartheid era?
Janus-faced activists: the social and political embeddedness of civil society in Niger
Authors: Schritt Jannik 
Published: March 2020

AbstractThis article discusses the workings of civil society and its leaders in Niger. Tracing the country's historically sedimented socio-political order, it argues that Niger's civil society is characterized by a twofold embeddedness. Since the introduction of multiparty politics in 1990, the political game in Niger has been exemplified by co-optation, bribery and corruption. These spoils are a central focus for civil society leaders who have become experienced in the political game. Indeed, actors’ social embeddedness in networks of solidarity demands that they capture and redistribute the spoils they receive. At the same time, however, their social and political legitimacy as civil society leaders rests on their ability to avoid becoming entangled in the game, and to avoid accusations of ‘playing politics’. In other words, civil society activists are embedded in the same social and political structures as state bureaucrats and politicians. In this context, civil society activists cannot maintain the moral high ground they often claim to occupy.
The importance of constraints on constraints
Authors: Bates Christopher J. , Sims Chris R. , Jacobs Robert A. 
Published: March 2020

Abstract
The “resource-rational” approach is ambitious and worthwhile. A shortcoming of the proposed approach is that it fails to constrain what counts as a constraint. As a result, constraints used in different cognitive domains often have nothing in common. We describe an alternative framework that satisfies many of the desiderata of the resource-rational approach, but in a more disciplined manner.
Sampling as a resource-rational constraint
Authors: Sanborn Adam N. , Zhu Jianqiao , Spicer Jake , Chater Nick 
Published: March 2020

Abstract
Resource rationality is useful for choosing between models with the same cognitive constraints but cannot settle fundamental disagreements about what those constraints are. We argue that sampling is an especially compelling constraint, as optimizing accumulation of evidence or hypotheses minimizes the cost of time, and there are well-established models for doing so which have had tremendous success explaining human behavior.
Projectile energy dependence of L X-ray emission in collisions of Xe23+ with In target: role of Coulomb ionization and quasi-molecular effects
Authors: Ren Jieru , Zhao Yongtao , Ma Wencai , Wang Xing , Liu Yu , Hu Pengfei , Cheng Rui , Zhou Xianming , Wang Yuyu , Lei Yu , Chen Yanhong , Xiao Guoqing 
Published: March 2020

AbstractThe X-ray emissions in the interaction of 3–6 MeV Xe23+ ions into thick solid In target are measured. The projectile-to-target and target Lα/Lβ X-ray production intensity ratios are observed to strongly depend on the projectile energy. The dependence deviates from Coulomb ionization predictions, which implies the important roles of coupling between subshells and the activation of 4fσ rotational couplings for projectile energy larger than 5 MeV.
A Review of Dynamic Balancing for Robotic Mechanisms
Authors: Wei Bin , Zhang Dan 
Published: March 2020

SUMMARYThe authors summarize the main dynamic balancing methods of robotic mechanisms in this paper. The majority of dynamic balancing methods have been presented, and there may be other dynamic balancing methods that are not included in this paper. Each of the balancing methods is reviewed and discussed. The advantages and disadvantages of each method are presented and compared. The goal of this paper is to provide an overview of recent research in balancing. The authors hope that this study can provide an informative reference for future research in the direction of dynamic balancing of robotic mechanisms.
The development of a theoretically derived measure exploring extreme appraisals of sleep in bipolar disorder: a Delphi study with professionals
Authors: Pearson Lydia , Parker Sophie , Mansell Warren 
Published: March 2020

AbstractBackground:Sleep and mood are known to be linked and this is particularly evident in people with a diagnosis of bipolar disorder (BD). It has been proposed that psychological interventions improving sleep can be a pathway for improving mood. In order for a psychological sleep intervention to be appropriate, the common cognitive processes maintaining the range of sleep disturbances need to be investigated.Aim:This study aimed to explore and identify expert consensus on positive and negative sleep appraisals in the context of low and high mood states, using the Integrative Cognitive Model as a theoretical guide.Method:A Delphi approach was utilized to allow clinical and research professionals, with experience in the field of BD, to be anonymously consulted about their views on sleep appraisals. These experts were invited to participate in up to three rounds of producing and rating statements that represented positive and negative sleep appraisals.Results:A total of 38 statements were developed and rated, resulting in a final list of 19 statements that were rated as ‘essential’ or ‘important’ by >80% of the participants. These statements represent the full range of extreme sleep appraisals this study had set out to explore, confirming the importance of better understanding and identifying positive and negative sleep cognitions in the context of high and low mood.Conclusion:The statements reviewed in this study will be used to inform the development of a sleep cognition measure that may be useful in cognitive therapy addressing sleep disturbances experienced along the bipolar spectrum.
Examining school-level implementation of British Columbia, Canada’s school food and beverage sales policy: a realist evaluation
Authors: Levay Adrienne V , Chapman Gwen E , Seed Barb , Wittman Hannah 
Published: March 2020

AbstractObjective:To identify key school-level contexts and mechanisms associated with implementing a provincial school food and beverage policy.Design:Realist evaluation. Data collection included semi-structured interviews (n 23), structured questionnaires (n 62), participant observation at public events (n 3) and scans of school, school district and health authority websites (n 67). The realist heuristic, context + mechanism → outcome configuration was used to conduct the analysis.Setting:Public schools in five British Columbia (BC), Canada school districts.Participants:Provincial and regional health and education staff, private food vendors and school-level stakeholders.Results:We identified four mechanisms influencing the implementation of BC’s school food and beverage sales policy. First, the mandatory nature of the policy triggered some actors’ implementation efforts, influenced by their normative acceptance of the educational governance system. Second, some expected implementers had an opposite response to the mandate where they ignored or ‘skirted’ the policy, influenced by values and beliefs about the role of government and school food. A third mechanism related to economics demonstrated ways vendors’ responses to school demand for compliance with nutritional Guidelines were mediated by beliefs about food preferences of children, health and food. The last mechanism demonstrated how resource constraints and lack of capacity led otherwise motivated stakeholders to not implement the mandatory policy.Conclusion:Implementation of the food and beverage sales policy at the school level is shaped by interactions between administrators, staff, parent volunteers and vendors with contextual factors such as varied motivations, responsibilities and capacities.
The chemical feature of Miras in 47 Tuc based on the WINERED spectra
Authors: Wang Y. , D’Orazi V. , Matsunaga N. , Bono G. 
Published: March 2020

AbstractVariable stars are good stellar tracers. Among various variables, Miras have long periods and are at the evolutionary phase of asymptotic giant branch. Their low effective temperatures lead to a difficulty to determine their chemical composition that since plenty of molecular bands exist in their spectra which even blocks the identifition of metallic lines. However, molecular features are less common in near-infrared (NIR) compared with other wavelength ranges. Here we take advantage of the high-resolution (R ~ 28, 000) spectra obtained with WINERED, which is a NIR spectrograph covering the wavelength range of 0.91–1.35 μm, to analyze and determine the chemical abundances of three Miras in the Galactic globular cluster 47 Tuc (NGC 104). Steps of data reduction and analysis, as well as part of the preliminary results, are briefly shown.
Globular clusters in the era of precision astrometry
Authors: Bianchini Paolo 
Published: March 2020

Abstracthe study of the kinematics of globular clusters (GCs) offers the possibility of unveiling their long term evolution and uncovering their yet unknown formation mechanism. Gaia DR2 has strongly revitalized this field and enabled the exploration of the 6D phase-space properties of Milky Way GCs, thanks to precision astrometry. However, to fully leverage on the power of precision astrometry, a thorough investigations of the data is required. In this contribution, we show that the study of the mean radial proper motion profiles of GCs offers an ideal benchmark to assess the presence of systematics in crowded fields. Our work demonstrates that systematics in Gaia DR2 for the closest 14 GCs are below the random measurement errors, reaching a precision of ∼0.015 mas yr−1 for mean proper motion measurements. Finally, through the analysis of the tangential component of proper motions, we report the detection of internal rotation in a sample of ∼50 GCs, and outline the implications of the presence of angular momentum for the formation mechanism of proto-GC. This result gives the first taste of the unparalleled power of Gaia DR2 for GCs science, in preparation for the subsequent data releases.
Hydrodynamic simulations of second generation star formation in a young globular cluster
Authors: Calura Francesco 
Published: March 2020

AbstractI will present results obtained by means of three-dimensional hydrodynamic simulations of the formation of second generation (SG) stars in a young globular cluster (GC). Our setup includes the mass return from Asymptotic Giant branch (AGB) stars, the accretion of pristine gas as well as star formation of SG stars, three ingredients which have never been simultaneously taken into account in previous 3D numerical studies of GC formation. The cluster is set in motion with respect to a distribution of gas and allowed to accrete mass from it. Formation of SG stars occurs out of the gas shed by AGB stars and from the gas accreted during the motion of the cluster. We consider two models characterised by different densities of the external gas. In both cases, we find that a very compact SG subsystem with central density > 105M⊙/pc3 forms in the innermost regions of the cluster.
Radial distribution of Blue Stragglers in NGC 5466 using AstroSat
Authors: Sahu Snehalata , Subramaniam Annapurni 
Published: March 2020

AbstractWe present the results obtained from Near-UV observations of the cluster NGC 5466 taken with UVIT onboard AstroSat to study the radial distribution of Blue Straggler Stars (BSSs), covering the cluster region up to a radius of 14'. Our study confirms that the BSSs are more centrally concentrated than Horizontal Branch (HB) stars in the cluster. We do not find a statistically significant rising trend in the radial distribution of BSSs for the outer regions, as most of the previously catalogued BSSs that are located in the cluster outskirts were found to be non-members, quasars or galaxies. This study highlights the importance of UV imaging combined with membership information to probe the radial distribution of BSSs.
The tidal tails of open star clusters produced by early gas expulsion
Authors: Dinnbier František , Kroupa Pavel 
Published: March 2020

AbstractWe investigate, for the first time, the formation and evolution of the tidal tail released from a young Pleiades-like star cluster due to expulsion of primordial gas in a realistic gravitational field of the Galaxy. The tidal tails (as well as clusters) are integrated by nbody6 from their embedded phase for more than 300 Myr. We vary the star formation efficiency (SFE) from 33% to 100% and the timescales of gas expulsion as free parameters, and provide predictions for the morphology and kinematics of the evolved tail for each of the models. The resulting tail properties are intended for comparison with Gaia measurements, where an inverse analysis of our findings might constrain some of the poorly understood conditions and processes in embedded star clusters during the gas phase and gas expulsion.
Dynamical evolution of star clusters with top-heavy IMF
Authors: Haghi Hosein , Safaei Ghasem , Zonoozi Akram H. , Kroupa Pavel 
Published: March 2020

AbstractSeveral observational and theoretical studies suggest that the initial mass function (IMF) slope for massive stars in globular clusters (GCs) depends on the initial cloud density and metallicity, such that the IMF becomes increasingly top-heavy with decreasing metallicity and increasing the gas density of the forming object. Using N-body simulations of GCs starting with a top-heavy IMF and undergo early gas expulsion within a Milky Way-like potential, we show how such a cluster would evolve. By varying the degree of top-heaviness, we calculate the dissolution time and the minimum cluster mass needed for the cluster to survive after 12 Gyr of evolution.
Phase space complexity of star clusters: Fresh observables for old and new questions
Authors: Lisa Varri Anna , Breen Philip G. , Heggie Douglas C. 
Published: March 2020

AbstractThe blooming era of precision astrometry for Galactic studies truly brings the rich internal dynamics of globular clusters to the centre stage. But several aspects of our current understanding of fundamental collisional stellar dynamics cannot match such new-generation data and the theoretical ambitions they trigger. This rapidly evolving context offers the stimulus to address a number of old and new questions concerning the phase space properties of this class of stellar systems.
Unexpectedly high formation rate of merging binary black holes in open clusters
Authors: Kumamoto Jun , Fujii Michiko S. , Tanikawa Ataru 
Published: March 2020

AbstractGravitational wave direct detections suggest that 30 M⊙ binary black holes (BBHs) commonly exist in the universe. One possible formation scenario of such BBHs is dynamical three-body encounters in dense star clusters. We performed a series of direct N-body simulations with a mass of 2500 and 10000 M⊙ and found a new channel for the formation of BBHs which is dominant in open clusters. In open clusters, the core-collapse time is shorter than in globular clusters, and therefore massive main-sequence (MS) binaries can form before they evolve to BHs. These MS binaries experience common envelope evolution and evolve to hard BBHs, which can merge within the Hubble time. The number of BBH mergers per unit mass obtained from our simulations reached 20–50 % of that for globular clusters, assuming an initial cluster mass function. Thus, open clusters can be a dominant formation site of hard BBHs.
Chemical and kinematic study of Large Magellanic Cloud RGB stars
Authors: Minelli Alice , Mucciarelli Alessio 
Published: March 2020

AbstractThe Large Magellanic Cloud (LMC) is the closest massive satellite of the Milky Way (MW), and its proximity allows us to study its stellar populations with great detail, both with resolved photometry and spectroscopy. In turn, this is crucial to unveil its star formation and chemical enrichment histories, and also to investigate the effects that gravitational interactions with other systems (as the Small Magellanic Cloud (SMC) and the MW) may induce on an irregular galaxy. The LMC is characterized by a still on-going star formation activity, as traced by the wide range of ages and metallicities of its stellar populations. However, most of the information about the chemistry and the kinematics of this galaxy has been obtained from low-resolution spectra, which do not allow to draw firm conclusions on many crucial open questions. In particular, (1) we still miss a homogeneous determination of the LMC metallicity distribution; (2) the metal-poor component is still poorly known and described; and (3) we have no conclusive information on the existence of metallicity gradients, which would suggest to spatially inhomegeneous star formation events. To properly address these issues, we analysed nearly 500 high-resolution FLAMES spectra of red giant stars belonging to the LMC field, the largest set of high- resolution spectra of LMC stars analysed so far in a homogeneous way.
Dynamical models of spheroidal multi-component stellar systems
Authors: Caravita Caterina , Ciotti Luca , Pellegrini Silvia 
Published: March 2020

Abstract. We present a significantly improved version of our numerical code JASMINE, that can now solve the Jeans equations for axisymmetric models of stellar systems, composed of an arbitrary number of stellar populations, a Dark Matter halo, and a central Black Hole. The stellar components can have different structural (density profile, flattening, mass, scale length), dynamical (rotational support, velocity dispersion anisotropy), and population (age, metallicity, Initial Mass Function, mass-to-light ratio) properties. These models, when combined with observations, will allow to investigate important issues, such as quantifying the systematic effects of IMF variations, of mass-to-light ratio gradients, and of different stellar kinematic components (e.g. counter rotating disks, kinematically decoupled cores) on luminosity-weighted properties. The developed analytical and numerical framework aims at modeling Early-Type Galaxies, but it can also be applied to dwarf Spheroidal galaxies and Globular Clusters.
Star clusters of the Andromeda galaxy. Multicolour HST photometry
Authors: Naujalis Rokas , Stonkutė Rima , Vansevičius Vladas 
Published: March 2020

AbstractWe performed a new integrated photometry in six passbands on HST M31 PHAT survey mosaics of 1181 star clusters spread over a large range of radial distance. Due to strongly varying background we interactively determined its level based on image and growth-curve analysis. We derived cluster age, mass, extinction, and metallicity by employing stochastic star cluster models.
Understanding the dynamical status of Galactic Globular Cluster NGC 6656
Authors: Singh Gaurav , Yadav R. K. S. 
Published: March 2020

AbstractWe present the study of horizontal branch morphology of the cluster NGC 6656. A blueward shift in temperature of about ~5000 K (nM-jump) in the color-color plot is detected.To explain this feature, we study the presence of stellar-mass black hole by plotting Projected density profile (PDP) in the central HST region. The PDP in the inner region (r < 10″) can be nicely reproduced by the king+BH model. The blue ward shift in temperature can be due the presence of stellar mass black holes in the centre.
BEANS – distributed data analysis for numerical simulations
Authors: Hypki Arkadiusz , Giersz Mirek , Askar Abbas , Belloni Diogo , Leveque Agostino 
Published: March 2020

Abstractbeans is a tool for distributed data analysis. It provides web and command line interface for data analysis and plotting for huge datasets. beans is written in a general form and can be used in any field of research to analyze the data. The main purpose of beans is to provide to the community a versatile tool to store, analyze and then visualize any amount of scientific data (e.g. numerical simulation, observations).
Extra-tidal features using Gaia DR2
Authors: Carballo-Bello Julio A. 
Published: March 2020

AbstractIn recent years, we have gathered enough evidence showing that most of the Galactic globular clusters extend well beyond their King tidal radii and fill their Jacobi radii in the form of “extended stellar haloes”. In some cases, because of the interaction with the Milky Way, stars are able to exceed the Jacobi radius, generating tidal tails which may be used to trace the mass distribution in the Galaxy. In this work, we use the precious information provided by the space mission Gaia (photometry, parallaxes and proper motions) to analyze NGC 362 in the search for member stars in its surroundings. Our preliminar results suggest that it is possible to identify member stars and tidal features up to distances of a few degrees from the globular cluster center.