bluuebunny/crossref_metadata_2025 huggingface dataset:
Negative Magnetoresistance in Si Nanograting Layers
Authors: Tavkhelidze Avtandil , Grabecki Grzegorz , Jangidze Larissa , Yahniuk Ivan , Taliashvili Zakhari , Taliashvili Badri
Published: April 2019

Experimental measurements of low‐temperature electron transport across Si nanogratings with 200 nm period are reported. The structure is fabricated of silicon on insulator layer using laser interference lithography followed by reactive ion etching. For transport measurements, macroscopic Hall bar formed in the patterned layer is used. The main result is negative magnetoresistance observed for temperatures lower than 60 K and not saturating in magnetic fields up to 9 Tesla. It is interpreted in terms of weak localization suppression and fit the magnetoresistance curves by both the two‐dimensional and three‐dimensional theoretical models. Surprisingly, both models describe satisfactorily the data and thus the problem of dimensionality remains unsettled. However, obtained values of the phase coherence lengths are significantly smaller than both the nanograting period and layer thickness, indicating that the dominant scattering mechanism is not result of the nanostructure geometry.
Electrochemical Capacitance and Transit Time in Quantum Hall Conductors
Authors: Delgard Adrien , Chenaud Boris , Mailly Dominique , Gennser Ulf , Ikushima Kenji , Chaubet Christophe
Published: April 2019

In a two dimensional electron gas, low energy transport in presence of a magnetic field occurs in chiral 1D channels located on the edge of the sample. In the AC description of quantum transport, the emittance determines the amplitude of the imaginary part of the admittance, whose sign and physical meaning are determined by the sample topology: a Hall bar is inductive while a Corbino ring is capacitive. In this article, the perfect capacitive character of Corbino samples in the quantum Hall effect regime is shown. A vanishing conductance and an electrochemical capacitance which depends on the density of states of 1D channels are measured. Our samples have no gate, neither on the side nor on the top, and the inner capacitances are measured. The transit time of electrons across the device is obtained and the drift velocity of carriers is deduced.
Nonlinear latitudinal transfer of wave activity in the winter stratosphere
Authors: Scott Richard K.
Published: April 2019

The transfer of wave activity between wave guides separated in latitude by a surf zone region of zero potential vorticity gradient is investigated in a simple model of the winter stratosphere and its extension into the Tropics. The distinction from classical wave propagation on a slowly varying background state is illustrated in a conceptual model in which latitudinal separation is reduced locally by wave disturbances of finite amplitude, implying a nonlinear dependence of the transfer on wave amplitude and a nonlinear transfer of wave activity to higher zonal wavenumbers. The response of a topographically forced vortex in the presence of different forms of tropical circulation, comprising either uniform or vertically localized anomalies, is examined numerically, using an exact pseudomomentum‐based wave activity to diagnose separately the vortex and tropical wave responses. Changes to the zonal mean flow in the Tropics are related in a natural way to the potential vorticity structure of the background state and the associated wave guides, which also control the general character of tracer mixing across and out of the Tropics.
List colorings of multipartite hypergraphs
Authors: Méroueh Arès , Thomason Andrew
Published: April 2019

Let χl(G) denote the list chromatic number of the r‐uniform hypergraph G. Extending a result of Alon for graphs, Saxton and the second author used the method of containers to prove that, if G is simple and d‐regular, then . To see how close this inequality is to best possible, we examine χl(G) when G is a random r‐partite hypergraph with n vertices in each class. The value when r = 2 was determined by Alon and Krivelevich; here we show that almost surely, where d is the expected average degree of G and . The function g(r,α) is defined in terms of “preference orders” and can be determined fairly explicitly. This is enough to show that the container method gives an optimal lower bound on χl(G) for r = 2 and r = 3, but, perhaps surprisingly, apparently not for r ≥ 4.
Soft X‐ray spectromicroscopy studies of pitting corrosion of reinforcing steel bar
Authors: Guo Xiaoxuan , Situm Arthur , Barlow Burke C. , Guo Bao , Burgess Ian J. , Grosvenor Andrew P.
Published: April 2019

Pitting corrosion of reinforcing steel bar (rebar) imbedded in concrete by chloride ions can cause concrete degradation. It is thus necessary to develop methods to mitigate concrete corrosion which could include using a protective polymer rebar coating. Corrosion studies of polyvinyl butyral‐carbon black polymer‐coated rebar using soft X‐ray fluorescence (XRF) microprobe and micro‐X‐ray absorption near edge spectroscopy (μ‐XANES) are reported in this study. After removal of the polyvinyl butyral‐carbon black polymer coating, Fe Lα1, Mn Lα1, and O Kα1 XRF maps were collected as well as Fe and Mn L3‐edge μ‐XANES spectra from different regions across the whole rebar surface by collection of total electron yield (TEY) and partial XRF yield (PFY) spectra. The distribution of metallic Fe and Fe corrosion products was determined by analysis of the Fe XRF map. The μ‐XANES spectra indicated a higher fraction of Fe (III) phases on the corroded rebar surface, while Fe (II/III) phases were the major corrosion products beneath the surface region. In addition, Mn (II) and Mn (III) were determined as the valence states of the manganese corrosion products.
Two‐stage analysis for selecting fixed numbers of features in omics association studies
Authors: Kawabata Takanori , Emoto Ryo , Nishino Jo , Takahashi Kunihiko , Matsui Shigeyuki
Published: April 2019

One of main roles of omics‐based association studies with high‐throughput technologies is to screen out relevant molecular features, such as genetic variants, genes, and proteins, from a large pool of such candidate features based on their associations with the phenotype of interest. Typically, screened features are subject to validation studies using more established or conventional assays, where the number of evaluable features is relatively limited, so that there may exist a fixed number of features measurable by these assays. Such a limitation necessitates narrowing a feature set down to a fixed size, following an initial screening analysis via multiple testing where adjustment for multiplicity is made. We propose a two‐stage screening approach to control the false discovery rate (FDR) for a feature set with fixed size that is subject to validation studies, rather than for a feature set from the initial screening analysis. Out of the feature set selected in the first stage with a relaxed FDR level, a fraction of features with most statistical significance is firstly selected. For the remaining feature set, features are selected based on biological consideration only, without regard to any statistical information, which allows evaluating the FDR level for the finally selected feature set with fixed size. Improvement of the power is discussed in the proposed two‐stage screening approach. Simulation experiments based on parametric models and real microarray datasets demonstrated substantial increment in the number of screened features for biological consideration compared with the standard screening approach, allowing for more extensive and in‐depth biological investigations in omics association studies.
Chemical Modification of Asphaltene with SEBS as Precursor for Isotropic Pitch‐Based Carbon Fiber
Authors: Ni Guosong , Jiang Wei , Shen Wenzhong
Published: April 2019

A high yield spinnable pitch for isotropic pitch‐based carbon fiber was successfully prepared by air oxidation polycondensation of asphaltene with styrene‐ethylene‐butylene‐styrene. The effects of reaction temperature and time, added styrene‐ethylene‐butylene‐styrene amount on the composition and spinning properties of resultant pitches were investigated. The resultant pitch with a concentrated molecular weight distribution of 300–700 Da was prepared at 340 °C for 3 h under air blowing with 5% styrene‐ethylene‐butylene‐styrene, moreover, its more alkyl structure (mainly methylene), lower apparent viscosity above the softening point, and good spinnability endowed the resultant pitches more prone to oxygen cross‐linking during the stabilization process. The average tensile strength of resultant pitch‐based carbon fibers was over 800 MPa after carbonization at 1000 °C for 10 min. It provided a simple method to adjust the spinnable pitch for pitch‐based carbon fiber preparation.
Flute‐like Fe2O3 Nanorods with Modulating Porosity for High Performance Anode Materials in Lithium Ion Batteries
Authors: Liu Huanqing , Zou Jiajia , Ding Yanhua , Xin Tuo , Liu Bing , Wang Yiqian
Published: April 2019

Flute‐like Fe2O3 nanorods with tunable porosity are obtained by facile hydrothermal process and subsequent calcination. The morphology, porosity and structural stability of Fe2O3 nanorods are effectively controlled by a two‐step strategy at nano/micrometer scale. The introduction of F ions promotes the formation of nanorod‐like iron hydroxide precursors, which are annealed at 400, 500 and 600 °C to obtain Fe2O3. The pore size increases with the annealing temperature. When tested as anode material of lithium ion batteries (LIBs), the porous Fe2O3 nanorods obtained by annealing at 500 °C exhibit better cycling stability and rate capability than those obtained at 400 and 600 °C. Most impressively, it delivers a capacity of 707.4 and 687.7 mAh g−1 at 1 and 2 A g−1 after 200 cycles, respectively. Compared to the other two samples, the Fe2O3 nanorods with optimized pore distribution exhibit robust porous framework, which contributes to the structural and electrochemical stability of electrode. The porous framework can effectively alleviate the severe volume expansion/contraction and avoid pulverization of active materials, resulting in outstanding reversibility and rate capability. This work will benefit the design of novel materials for LIBs.
Organic Solar Cells Based on High Hole Mobility Conjugated Polymer and Nonfullerene Acceptor with Comparable Bandgaps and Suitable Energy Level Offsets Showing Significant Suppression of Jsc–Voc Trade‐Off
Authors: Wang Zhen , Liu Xuncheng , Jiang Haiying , Zhou Xiaobo , Zhang Lianjie , Pan Feilong , Qiao Xianfeng , Ma Dongge , Ma Wei , Ding Liming , Cao Yong , Chen Junwu
Published: April 2019

Herein, a high‐mobility polymer (Si25) pairing a nonfullerene acceptor (O‐IDTBR) is introduced to construct active layers of organic solar cells (OSCs). The OSCs based on Si25 and O‐IDTBR with comparable bandgaps of 1.61 eV show high open‐circuit voltage (Voc) of 1.03 V. Suitable energy level offsets between the donor and acceptor as well as sufficient photon absorbance by a 400 nm thick active layer afford a notable short‐circuit current (Jsc) of 21.11 mA cm−2, indicating a significantly suppressed trade‐off between Jsc and Voc among OSCs. In addition, notable high power conversion efficiency (PCE) between 10.2% and 11.54% can be achieved with thick blend films from 210 to 560 nm, a thickness range beneficial to pin‐hole free printing. The maximum PCE of 11.54% corresponds to a 400 nm thick blend film, which is a rare thickness for high‐efficiency nonfullerene‐based OSCs. The corresponding fill factors (FFs) are between 51.59% and 53.33%. The inferior FF is due to a very low electron–hole mobility ratio, offering space for future FF elevation. The results highlight the high Voc and Jsc potentials for thick‐film nonfullerene OSCs based on a high hole mobility donor as well as looking forward to a high electron mobility nonfullerene acceptor.
New architecture and SCADA for stand‐alone hybrid (medium‐sized asynchronous wind turbine + UPS with battery + photovoltaic array) power system without diesel generator
Authors: Choe Ki Yong , Kim Ho , Li Jong U , Hyon Chung Il , Kang Il Yong
Published: April 2019

In general, the commercialized medium‐sized asynchronous wind turbines are fully automated facilities designed to operate in parallel connection to the grid; in case of isolated operation, they need to be combined with diesel generator. This paper aims at studying the method of producing electricity of maximal quality with the wind, by constructing a new stand‐alone hybrid (medium‐sized asynchronous wind turbines, UPS with battery, and photovoltaic array) power system without diesel generator. This paper proposes a new architecture of stand‐alone hybrid power system that consists of medium‐sized asynchronous wind turbine, UPS, current limiter (reactor), photovoltaic array, and consumer and dump loads; accordingly, a supervisory control and data acquisition (SCADA) for this system is suggested along with the operation strategies depending on the output power of the UPS and wind turbine, consumer load, and the battery voltage of UPS. The case study was confirmed through the simulation results of the operation of a new stand‐alone hybrid (two 110 kW of asynchronous wind turbines, 250 kVA of UPS with battery, reactor, 36 kW of photovoltaic array, and consumer and dump loads) power system. The results of the simulation showed that the system frequency change of the new stand‐alone hybrid power system was 60 ± 0.5 Hz, and the one of the wind + diesel stand‐alone hybrid system was 60 ± 1 Hz, for the sudden change of consumer load and gust. This new system can be eligible as a standardizing option for the architecture of nondiesel stand‐alone hybrid system and its SCADA system.
In this issue of Weather
Authors: Galvin Jim
Published: April 2019

We begin this month's issue with the first in a series of papers re‐examining one aspect associated with the sinking of the Titanic. In ‘Titanic's mirage, part 1: The enigma of the Arctic High and a cold‐water tongue of the Labrador Current’ on p. 119, Mila Zinkova presents an excellent review of the meteorology of visibility over cold waters and the areas where mixing occurs.

At the beginning of 2019, radar used operationally for weather forecasting and hydrology passed a significant anniversary in the United Kingdom. On p. 128, the short paper ‘Radar for hydrological forecasting in the UK 50 years on’ describes the development and use of this essential tool. Chris Collier was involved in much of this development and his review reveals the importance of the project and its value.

On p. 130, we publish the last of the papers marking the cold weather and snow of February and March 2018, the others the content of the Special Issue of March 2019. Bill Pike and his co‐authors kept records of the snow cover and other weather factors during the event in Berkshire, Suffolk and Kent. These are reproduced in ‘Weather diaries during the easterlies of February and March 2018’.

An important question that is often raised in this period of anthropogenic warming is the effect of carbon dioxide on temperature. ‘Climate sensitivity: how much warming results from increases in atmospheric carbon dioxide (CO2)?’, the latest in our Climate‐change shorts series, provides an answer to this rather complex question and one that we all need to understand.

Many readers will know that tropical meteorology is frequently associated with thunderstorms, but these storms vary in their frequency by area and time of year, as revealed by Omvir Singh and Pankaj Bhardwaj in ‘Spatial and temporal variations in the frequency of thunderstorm days over India’ on p. 138.

The replacement of instruments always presents a challenge – not least, thermometers, the readings from which form the longest climatic series in the world. Almost all instruments have had to be replaced as automation and electronic sensing have come to the fore. A standard form of electronic thermometer and its exposure, together able to reproduce well‐established temperature series, are discussed by Ian Strangeways in ‘The replacement of mercury thermometers in Stevenson screens’ on p. 145.

A growing area of research in meteorology and climatology is the association of weather with disease. This is discussed on p. 148 by in ‘The relationship between meteorological factors and the risk of bacillary dysentery in Hunan Province, China’ by Xuewen Li and her co‐authors. As we understand how weather can affect diseases, we can put into place appropriate measures to combat them.

Our final paper this month is ‘Brewster's dark patch: a neglected optical phenomenon in the landscape’ – an optical phenomenon little discussed in meteorological literature. G P Können puts this right in his eminent explanation of its formation on p. 154.
Axion global fits with Peccei-Quinn symmetry breaking before inflation using GAMBIT
Authors: Hoof Sebastian , Kahlhoefer Felix , Scott Pat , Weniger Christoph , White Martin
Published: April 2019

Abstract

We present global fits of cosmologically stable axion-like particle and QCD axion models in the mass range 0.1 neV to 10 eV. We focus on the case where the Peccei-Quinn symmetry is broken before the end of inflation, such that the initial value of the axion field can be considered to be homogeneous throughout the visible Universe. We include detailed likelihood functions from light-shining-through-wall experiments, haloscopes, helioscopes, the axion relic density, horizontal branch stars, supernova 1987A, white dwarf cooling, and gamma-ray observations. We carry out both frequentist and Bayesian analyses, with and without the inclusion of white dwarf cooling. We explore the degree of fine-tuning present in different models and identify parameter regions where it is possible for QCD axion models to account for both the dark matter in the Universe and the cooling hints, comparing them to specific DFSZ- and KSVZ-type models. We find the most credible parameter regions, allowing us to set (prior-dependent) upper and lower bounds on the axion mass. Our analysis also suggests that QCD axions in this scenario most probably make up a non-negligible but sub-dominant component of the dark matter in the Universe.
Critical Ising model with boundary magnetic field: RG interface and effective Hamiltonians
Authors: Konechny Anatoly
Published: April 2019

Abstract

Critical 2D Ising model with a boundary magnetic field is arguably the simplest QFT that interpolates between two non-trivial fixed points. We use the diagonalising Bogolyubov transformation for this model to investigate two quantities. Firstly we explicitly construct an RG interface operator that is a boundary condition changing operator linking the free boundary condition with the one with a boundary magnetic field. We investigate its properties and in particular show that in the limit of large magnetic field this operator becomes the dimension 1/16 primary field linking the free and fixed boundary conditions. Secondly we use Schrieffer-Wolff method to construct effective Hamiltonians both near the UV and IR fixed points.
On brane gaugino condensates in 10d
Authors: Hamada Yuta , Hebecker Arthur , Shiu Gary , Soler Pablo
Published: April 2019

Abstract

We analyze the structure of gaugino interactions on D7-branes from a 10d perspective. This is essential if one wants to lift the standard 4d approach to type IIB moduli stabilization to 10d. In particular, a 10d picture has recently been used to raise concerns about the KKLT proposal for constructing de Sitter vacua, and to lend support to swampland conjectures against de Sitter. However, the analyses of brane gaugino condensation so far are plagued by UV divergences and do not include local 4-fermion terms. They also fail to reproduce the 4-fermion terms required by supergravity when compactified to four dimensions. Motivated by the structure of heterotic and Hořava-Witten theories, we suggest an extension of the brane action by a particular 4-fermion operator that resolves the above problems. Crucially, the UV divergence is cancelled and the expected structure of the 4d effective action is reproduced. We believe that attempts at a 10d description of KKLT have to be reconsidered in this new light.
High U(1) charges in type IIB models and their F-theory lift
Authors: Cianci Francesco Mattia , Mayorga Peña Damián K. , Valandro Roberto
Published: April 2019

Abstract

We construct models with U(1) gauge group and matter with charges up to 6, in the context of type IIB compactifications. We show explicitly that models with charges up to 4 can be derived from corresponding models in F-theory by applying the Sen weak coupling limit. We derive which type IIB models should be the limit of charge 5 and 6 F-theory models. Explicit six dimensional type IIB models with maximal charge 5 and 6 are constructed on an algebraic K3 surface that is the double cover of ℂℙ2. By using type IIB results we are also able to rediscover the F-theory charge 4 model in a straightforward way.
Geometric shape features extraction using a steady state partial differential equation system
Authors: Yamada Takayuki
Published: April 2019

A unified method for extracting geometric shape features from binary image data using a steady-state partial differential equation (PDE) system as a boundary value problem is presented in this paper. The PDE and functions are formulated to extract the thickness, orientation, and skeleton simultaneously. The main advantage of the proposed method is that the orientation is defined without derivatives and thickness computation is not imposed a topological constraint on the target shape. A one-dimensional analytical solution is provided to validate the proposed method. In addition, two-dimensional numerical examples are presented to confirm the usefulness of the proposed method.

Highlights A steady state partial differential equation for extraction of geometrical shape features is formulated. The functions for geometrical shape features are formulated by the solution of the proposed PDE. Analytical solution is provided in one-dimension. Numerical examples are provided in two-dimension.
HENKIN CONSTRUCTIONS OF MODELS WITH SIZE CONTINUUM
Authors: BALDWIN JOHN T. , LASKOWSKI MICHAEL C.
Published: April 2019

We describe techniques for constructing models of size continuum inωsteps by simultaneously building a perfect set of enmeshed countable Henkin sets. Such models have perfect, asymptotically similar subsets. We survey applications involving Borel models, atomic models, two-cardinal transfers and models respecting various closure relations.
The Tutsi and the Nyamwezi: Cattle, Mobility, and the Transformation of Agro-Pastoralism in Nineteenth-Century Western Tanzania
Authors: Rockel Stephen J.
Published: April 2019

The key role of the Nyamwezi in the nineteenth-century caravan trade of East and Central Africa is well known. The convergence of rapid change in Unyamwezi, a region connecting areas of economic specialization, is more obscure. The development of agro-pastoralism in Unyamwezi was an adaptation and an opportunity forged by (unequal) partnerships between the Nyamwezi commercial elite and Tutsi immigrants. Patron-client relationships reflected prevailing economic and political forces, reversing the pattern of pastoral dominance in the Great Lakes region. Two different agro-ecological, sociological and political regions – the East African woodland savannah and the Great Lakes zone – were interlinked in a trans-regional cattle, salt, and labor economy intertwined with global capitalism. Human mobility stimulated change but so too did movements of livestock, diseases, agricultural regimes, and ecological boundaries.
The distribution of bleeding sites in idiopathic hidden arterial epistaxis
Authors: Lou Z-C , Lou Z-H
Published: April 2019

Objective

To determine the frequency distribution of bleeding sites in idiopathic hidden arterial epistaxis.

Methods

In this retrospective cohort study, 107 patients with hidden arterial epistaxis were endoscopically examined for sites of bleeding.

Results

All sites of hidden arterial epistaxis were identified by endoscopic examination. Bleeding sites were identified at initial surgery in 103 patients and during the second surgery in 4. The bleeding sites included: the olfactory cleft region in 47 patients, the inferior meatus region in 29, the middle meatus region in 11, multiple bleeding sites (olfactory cleft and anterior septum) in 3, the anterior roof of the nasal cavity in 4, the nasal floor in 11 and the nasopharynx in 2. The bleeding points showed a white or red volcano-like bump in 75 patients, isolated prominent telangiectasia in 21 and mucosal ulceration in 11.

Conclusion

Common sites of hidden arterial epistaxis include the olfactory cleft, inferior meatus and middle meatus. However, there should be awareness of some uncommon bleeding sites (including the anterior roof of the nasal cavity, the nasal floor and the nasopharynx) and of multiple bleeding sites.
Responsibility in religiosity
Authors: SMITH STEVEN G.
Published: April 2019

Understanding ‘responsibility’ in its normal sense of freely fulfilling a role in a collaborative scheme, rather than as a basic agent integrity or prosocial disposition, I argue that the desirability of responsibility is one of the main supporting and constraining factors in the formation of religious thought and practice, with diversely typical manifestations. For those who are disposed to assume responsibility and to be religious, religious beliefs and practices offer a way of maximally enlarging one's responsibility, an intrinsically appealing prospect. The global relevance of religious responsibility is shown by comparing exemplars in a wide range of cultures. Aeneas, Kongzi, Dharmakara, and Miaoshan each embody maximal responsibility in a distinct way that motivates and sets standards for a religiosity.
Using One Strain Gauge Bridge to Detect Gait Events for a Robotic Prosthesis
Authors: Feng Yanggang , Wang Qining
Published: April 2019

For a real-time robotic prosthetic control, gait event detection plays an important role. In this paper, one novel sensor was proposed to realize gait event detection. The sensor includes one strain gauge bridge, which can reflect the entire deformation of carbon-fiber footplate on a robotic prosthesis. Three unilateral transtibial amputees participated in the experiments. Experimental results show that using the proposed sensor method, gait event detection (stance phase and swing phase) accuracy is approximately 100%. Based on the detected gait events, three locomotion modes (sit, stand, and walk) and the corresponding transition modes could be determined. Difference between different gait event detection systems was further conducted.
Localization of Neuroendocrine Functions Within the Hypothalamus
Authors: Bernardis Lee L.
Published: April 2019

The results of lesion, stimulation, deafferentation, implantatión and transplantation studies employed in the identification of hypophysiotrophic control areas in the hypothalamus to date suggest the following probable locations: corticotropic releasing factor (CRF) is formed in a diffuse area along the base of the median eminence, if not the base of the entire hypothalamus. Follicle stimulating hormone releasing factor (FSHRF) is elaborated in the paraventricular-suprachiasmatic areas but its cyclic control may reside in the anterior hypothalamic area. Luteinizing hormone (LH) is controlled by luteinizing hormone releasing factor (LHRF) formed in the suprachiasmatic area: its cyclic control may be in the preoptic area. Prolactin is controlled by prolactin inhibiting factor (PIF) localized in a diffuse area comprising the ventromedial, dorsomedial, arcuate and paraventricular nuclei. The hypothalamic area involved in thyroid control is also rather large, since thyrotropin stimulating hormone releasing factor (TSHRF) has been found in an area including the supraoptic and chiasmatic nuclei. Growth hormone releasing factor (GHRF) is elaborated in a rather narrow zone, the ventromedial hypothalamic nuclei.
Protection Against Good Intentions: The Catholic Role in the Campaign to Ban Proxy Adoption, 1956–1961
Authors: Choi Cathi
Published: April 2019

The debate over the practice of proxy adoption sheds light on changing notions of proper intercountry adoption practices and standards of family planning as they developed in the mid-twentieth century. The practice of proxy adoption was born out of a loophole in U.S. immigration legislation, initially used by Americans to adopt European orphans after World War II. After the Korean War, the practice was again utilized to bring Korean children in even greater numbers to the United States. Through proxy adoption, adoptive parents bypassed the standard checkpoints of the adoption process as established by U.S. social welfare agencies. Although initially hailed as a humane practice, proxy adoption was ultimately banned in 1961 after a successful antiproxy adoption campaign waged by a coalition of social welfare workers, Catholic leaders, and U.S. senators. The role of Catholic agencies in this debate is essential, yet remains largely unexplored. This article sheds light on this significant and underresearched history of the Catholic institutions involved in the proxy adoption debate.

The Catholic agencies, namely the National Catholic Welfare Conference and the Catholic Committee for Refugees, stood apart from both the government social welfare establishment and other humanitarian actors. Their actions must instead be understood through the context of their own institutional history of domestic social welfare programs and overseas humanitarian work, dating from the late nineteenth and early twentieth centuries. This article analyzes their relationship with the U.S. social welfare establishment, as well as joint advocacy efforts to reform intercountry adoption practices.
Gigantic mysticete predators roamed the Eocene Southern Ocean
Authors: Marx Felix G. , Buono Mónica R. , Evans Alistair R. , Fordyce R. Ewan , Reguero Marcelo , Hocking David P.
Published: April 2019

Modern baleen whales (Mysticeti), the largest animals on Earth, arose from small ancestors around 36.4 million years ago (Ma). True gigantism is thought to have arisen late in mysticete history, with species exceeding 10 m unknown prior to 8 Ma. This view is challenged by new fossils from Seymour Island (Isla Marambio), Antarctica, which suggest that enormous whales once roamed the Southern Ocean during the Late Eocene (c. 34 Ma). The new material hints at an unknown species of the archaic mysticete Llanocetus with a total body length of up to 12 m. The latter is comparable to that of extant Omura's whales (Balaenoptera omurai Wada et al. 2003), and suggests that gigantism has been a re-occurring feature of mysticetes since their very origin. Functional analysis including sharpness and dental wear implies an at least partly raptorial feeding strategy, starkly contrasting with the filtering habit of living whales. The new material markedly expands the size range of archaic mysticetes, and demonstrates that whales achieved considerable disparity shortly after their origin.
Exploring the relationship between Big Food corporations and professional sports clubs: a scoping review
Authors: Ireland Robin , Chambers Stephanie , Bunn Christopher
Published: April 2019

Objective

Professional sport occupies a prominent cultural position in societies across the globe and commercial organisations make use of this to promote their products. The present scoping review explores existing academic literature on the relationship between professional sports clubs and food and drink marketing and considers how this relationship may impact upon the public’s health.

Design

The scoping review searched six databases. Experts were also consulted. Records written in languages other than English were excluded. We also excluded records relating to mega events (e.g. Olympics, Football World Cup) and alcohol marketing, because of the attention already given to these.

Setting

Professional sports clubs.

Results

We identified 18 166 titles, reviewed 163 abstracts and read twenty-six full texts. We included six papers in the review. Four were from Australia and New Zealand. The Australasian literature focused largely on the marketing of foods and beverages to children and the potential impact on consumption. Single papers from researchers in Turkey and the USA were identified. The Turkish paper analysed shirt sponsorship in football leagues internationally and showed food and beverage (including alcohol) companies were the most common sponsors. The US paper examined a mixed reaction to a football team named after an energy drink.

Conclusions

Commercial relationships between professional sports clubs and Big Food corporations have largely eluded scrutiny in much of the world. The current review highlights the lack of public health research on these relationships. Research exploring the interdependent commercial practices of food and drink companies and professional sports clubs is urgently needed.
The IAU and the Impact Hazard
Authors: Rickman Hans
Published: April 2019

A brief history of research concerning the risk of impacts by asteroids or comets onto the Earth is presented with attention to the role played by the IAU. Special focus is placed on the events that occurred about 20 years ago, which caused the IAU to become seriously involved in dealing with the impact hazard and to take a leading role in international coordination of these activities.
With the IAU and inside the IAU since 1946
Authors: Pecker Jean-Claude
Published: April 2019

In this presentation the author narrates some key episodes of his life of serving the IAU for more than seventy years.

Astronomy, more than most sciences, requires an international collaboration. It is the duty of the IAU to insure, between astronomers of the whole world, scientific and human relations. Less than 1,000 astronomers at the time (1946) of my first papers, more than 10,000 today: this means many international collaborations, and many faithful friendships, through several General Assemblies, and many Symposia and Colloquia. To the young astronomers, I must only wish : Cheer up !

Not being able to participate to the XXXth General Assembly in Vienna, the author sent a video presentation (available on the Vienna GA web site), and also provided a spoken text (in French) that was rendered in written form by a voice-to-text software. This text, a recollection of the author’s life “inside the IAU”, was then translated and formatted by Chris Sterken. The English version follows; the original French text is included as an Appendix.
The first President of the IAU, Benjamin Baillaud
Authors: Bougeret Jean-Louis
Published: April 2019

Benjamin Baillaud was appointed president of the First Executive Committee of the International Astronomical Union which met in Brussels during the Constitutive Assembly of the International Research Council (IRC) on July 28th, 1919. He served in this position until 1922, at the time of the First General Assembly of the IAU which took place in Rome, May 2–10. At that time, Baillaud was director of the Paris Observatory. He had previously been director of the Toulouse Observatory for a period of 30 years and Dean of the School of Sciences of the University of Toulouse. He specialized in celestial mechanics and he was a strong supporter of the “Carte du Ciel” project; he was elected chairman of the permanent international committee of the Carte du Ciel in 1909. He also was the founding president of the Bureau International de l’Heure (BIH) and he was directly involved in the coordination of the ephemerides at an international level. In this paper, we present some of his activities, particularly those concerning international programmes, for which he received international recognition and which eventually led to his election in 1919 to the position of first president of the IAU. We also briefly recount the very first meetings and years of the IAU.
“The sky seems heavy with clouds”: Arthur S. Eddington and the IAU
Authors: Laguens Florian
Published: April 2019

This paper addresses the relationships between Arthur S. Eddington, former director of the Cambridge Observatory (1914-1944), with the International Astronomical Union. It is demonstrated that the Union was related to every major moment in Eddington’s scientific career. New historical elements are brought forward, in the last section of the paper, to demonstrate Eddington’s action in favour of German colleagues during the Second World War.
The Arab Astronomical Society (ArAS): Developing Astrophysics Research in the Arab World
Authors: Benkhaldoun Zouhair , Suleiman Raid M. , Moumen Ismael , Al-Rabban Moza M. , Asa’d Randa
Published: April 2019

The Arab Astronomical Society (ArAS) was officially created during the constitutional assembly held in Marrakech (Morocco) on November 30, 2016, and legally recognized on May 15, 2017. ArAS is composed of a group of Arab researchers and students in the field of astrophysics who aim to develop research in this field in the Arab world (22 countries). ArAS is working on bridging the gap between the Arab astrophysicists in the Arab world and those around the world by organizing collaborative workshops and international scientific meetings, offering scholarships and developing graduate programs in astrophysics. Presently, the Society is working on establishing personal and material scientific infrastructure in the Arab world by training advanced undergraduate and graduate students in astrophysics and stimulating the building of new telescopes on the best sites in the Arab world. This will be accomplished through the hosting of specialized schools and conferences in astrophysics, international collaborations, facilitation of students’ and post-docs’ training in international research centres and universities, the establishment of prizes in astronomy to honour leading Arab scientists in astronomy and to motivate junior researchers to present notable works in astronomy. In this work, we present the on-going ArAS activities as well as future projects. ArAS is a young but energetic organization which is welcoming collaborations and partnership with other groups.
Astronomy in Serbia and Serbia in the International Astronomical Union
Authors: Arbutina Bojan , Atanacković Olga
Published: April 2019

We briefly discuss the history of membership and the current position of Serbia inside the International Astronomical Union. We give an overview of astronomy education, research and public outreach in Serbia. Some statistics are presented concerning the number and gender of BSc, MSc and PhD students that graduated/obtained their degree in astronomy/astrophysics from the Department of Astronomy, Faculty of Mathematics, University of Belgrade. Due attention is paid to the most important scientific/educational institutions in Serbia in which the majority of astronomers are employed as well as various research topics investigated.
Developing Astronomy in Madagascar – the impact of the IAU Support
Authors: Randriamanakoto Zara
Published: April 2019

During its XXXth General Assembly, the International Astronomical Union (IAU) welcomed the island of Madagascar, under the Malagasy Astronomy & Space Science (MASS), as one of its new National Members. Founded in 2016, MASS is a non-profit association, a community of young professional astronomers and graduate students from Madagascar. As various organizational structures are gradually being established towards the development of Astronomy & Astrophysics in the country, the IAU has played a vital role and is still actively involved in achieving such ambitious goals.
The history of IAU Symposia
Authors: Mickaelian Areg M.
Published: April 2019

The history of the International Astronomical Union (IAU) meetings goes back to 1922 when the first IAU General Assembly (GA) was held in Rome, Italy, following the IAU creation in 1919. However, until 1953, no individual symposia were organized and the GAs were the only official gatherings for astronomers. All together, eight IAU GAs were held during 1922–1952. The IAU Symposium 1 was held in 1953 in Groningen, Netherlands. Starting with 1955, several IAU symposia were regularly held in different places, and since 1959, the IAU also began to organize colloquia to discuss relatively smaller topics. Twenty IAU colloquia numbered as I–XX were held in the period 1959–1971, and another series of IAU colloquia was organized in 1968–2005, numbered as Nos. 1–200. At present IAU symposia are the only official scientific meetings, nine of them being organized every year. IAU S349 “Under One Sky: the IAU Centenary Symposium”, held in Vienna during the IAU GA XXX, was the last one by number in 2018. Thus, the IAU has a 65-year history of symposia and all together 348 such meetings have been held, on average 5–6 annually. At present most of the IAU symposia during the years of GA are being organized in the framework of the GA, there being typically six symposia during each GA. All together, 31 IAU GA have been organized during the years 1922–2018, including 30 regular ones and one Extraordinary GA (1973 in Warsaw, Poland), typically once every three years. Since 1974, the IAU has also organized regional meetings in Europe, Asia and Pacific (APRIM), Latin America (LARIM), and the Middle East and Africa (MEARIM). The European ones were discontinued in 1990 after the creation of the European Astronomical Society (EAS) and the organization of the yearly JENAM/EWASS. The 348 IAU symposia have been organized in 43 countries. We give the statistics of all IAU symposia by year of organization, by various topics of astronomy and astrophysics, and by host countries and cities.
American Astronomers in Belgium, 1919: Snapshots from the Founding of the IAU
Authors: Lattis James M. , Lattis Anthony J.
Published: April 2019

The USA delegation to the July 1919 International Research Council meeting in Brussels included Joel Stebbins, then professor of astronomy and observatory director at the University of Illinois, as secretary of the executive committee appointed by the National Research Council. Stebbins, an avid photographer, documented the travels of their party as the American astronomers attended the meeting and later toured devastated towns, scarred countryside, and battlefields only recently abandoned. Published reports of the meeting afterward attest to the impression left on the American visitors, and the photographs by Stebbins give us a glimpse through their own eyes. Selected photographs, recently discovered in the University of Wisconsin Archives and never before publicly seen, will be presented along with some commentary on their significance for the International Astronomical Union, which took shape at that 1919 meeting.
The First Astronomical Text Published in the American Continent
Authors: Moreno-Corral Marco Arturo , Schuster William J.
Published: April 2019

In 1539 the Italian Giovanni Paoli, better known as Juan Pablos, began operating in Mexico City the first printing press that existed in the New World. The first books he printed were religious texts, vocabularies of some indigenous languages of Mexico, and compilations of ordinances and laws. In 1556 followed the Sumario compendioso de las cuentas, a text of arithmetic and algebra that was the first American mathematics book. A year later, he printed the Physica Speculatio by friar Alonso de la Veracruz, a text of Natural Philosophy that dealt with Aristotelian works such as Physics, On the Heavens, and Meteorology. As part of this book, was included the text of geocentric astronomy written during the thirteenth century by the Italian mathematician Giovanni Campano de Novara, entitled Tractatus de Sphaera, where the author discussed, from a geometric perspective, the cosmic structure and the stellar distribution. No doubt this is the first astronomical treatise that was published in the entire American continent, which is why it is emphasized here.
Publications of the International Astronomical Union as biographical sources
Authors: Dick Wolfgang R.
Published: April 2019

Publications of the International Astronomical Union (IAU), such as Proceedings of IAU Symposia and Colloquia, contain biographical notes and papers as well as obituaries. Of great value are also the death announcements in the IAU Information Bulletins that contain the only biographical data known for about 200 astronomers. The kind of data given in these announcements varied over time. References to these data can be found in the Biographical Index of Astronomy. Recently the printed announcements were replaced by entries in the on-line IAU membership database.
Inspiring Stars – the IAU inclusive world exhibition
Authors: D’Antonio Maria Rosaria , Canas Lina , Merced Wanda Diaz
Published: April 2019

Inspiring Stars (IS) is an itinerant international exhibition promoted by the International Astronomical Union (IAU) to disseminate world initiatives addressing inclusion in astronomy at the professional level. It encompasses (but is not limited to) outreach, teaching and professional aspects of astronomy, with the ultimate goal of evolving from a levelling the playing field to egalitarian participation by all. Here we present the work-in-progress, a framework of bridging activities and inclusion in the social context, which may provide Inspiring Stars with the potential to motivate the next generation and to document comparable data on inclusion in astronomy.
The IAU and French women astronomers
Authors: Débarbat Suzanne
Published: April 2019

The research about women in astronomy began in 1988 following a request received from Wilfried Schröder, now deceased but, at that time, in charge of the Interdivision Commisssion on History, which was included in the International Association of Geomagnetism and Aeronomy (IAGA) attached to the IUGG International Union of Geodesy and Geophysics. The results obtained concerning “Astronomy, Geophysics and Women”, presented at the symposium “The history of geomagnetism and aeronomy”, were published (Débarbat 1989) in Advances in Geosciences in the form of a short paper. The IAU began to publish, in 1992, membership statistics in its Information Bulletin IB 68, including percentages of women and men, and several papers were published on the subject up to the last one Statistics on Women in IAU Membership (Débarbat 1989). Recent results are given including examples from the past.
Inflated sense of responsibility, explanatory style and the cognitive model of social anxiety disorder: a brief report of a case control study
Authors: Jones Matthew , Rakovshik Sarah
Published: April 2019

We sought to investigate situation-specific inflated sense of responsibility and explanatory style in social anxiety disorder (SAD) according to the cognitive model. Participants aged 17–68 years (mean = 31.9, SD = 11.1) included waiting list patients referred to a primary care mental health service for cognitive behavioural therapy for SAD (n = 18) and non-anxious control participants (n = 65). A battery of psychometric measures, including a bespoke measure of responsibility beliefs, was used. Compared with controls, participants with SAD were more likely to demonstrate an inflated sense of responsibility (p ≤ 0.001), and to adopt a negative explanatory style specific to social interaction (p ≤ 0.01). Inflated sense of responsibility was found to correlate with SAD symptomatology (r = 0.47, p ≤ 0.05), and with increased usage of safety behaviours (r = 0.47, p ≤ 0.05). Caseness (β = 1.45, p ≤ 0.01) and stability of causal attribution (β = 0.25, p ≤ 0.001) were found to predict inflated responsibility in our sample. To our knowledge this study represents the first attempt to investigate inflated responsibility within the context of SAD. Our results support the notion of inflated responsibility as a feature of SAD.

Key learning aims

(1)

To understand the cognitive behavioural components of Clark and Wells’ model of SAD, and their bi-directional nature.

(2)

To understand what the term ‘inflated sense of responsibility’ refers to, and how it relates to CBT.

(3)

To understand what the term ‘explanatory style’ refers to, and how this concept can also relate to CBT.