bluuebunny/crossref_metadata_2025 huggingface dataset:
RicetissueTFDB: A Genome‐Wide Identification of Tissue‐Specific Transcription Factors in Rice
Authors: Chen Weiying , Chen Zhenyong , Luo Fuyan , Liao Mingli , Wei Shuhong , Yang Zaijun , Yang Jun
Published: November 2018

Transcription factors (TFs) regulate plant gene expression in different tissues. To investigate TF genes in rice (Oryza sativa L.), a genome‐wide TF identification was conducted with the japonica rice genome. This study identified 3078 putative TFs in 59 families. The TF number of the top 10 TF families accounted for 58% of the 3078 rice TFs. The three largest TF families were the myeloblastosis (MYB) superfamily, basic helix–loop–helix (bHLH), and far‐red‐impaired response (FAR1), which contained 413, 228, and 210 TF members, respectively. The expression profiles of the 3078 TF genes were surveyed with the RNA sequencing (RNA‐seq) data of 13 rice tissue types. Based on these expression profiles, we validated 1087 TFs expressed in 13 rice tissue types, which accounted for 35.32% of the 3078 putative TFs. We further analyzed the tissue‐specific TFs in rice. In total, 28, 14, 14, 10, 9, 5, 5, 4, 3, 3, 2, 11, and 1 tissue‐specific TF sequences were identified in the dry seed, pistil, spikelet, aleurone, anther, ovules, embryo 25 d after pollination (DAP), seed 5 DAP, root, leaf, seed 10 DAP, shoot, and endosperm 25 DAP, respectively. Moreover, we constructed RicetissueTFDB (http://221.237.158.212:50009/index), a comprehensive and public rice TF database that integrates tissue expression characters, genomic location, and Gene Ontology (GO) terms for each TF. The RicetissueTFDB database will facilitate the identification of target TFs and the functional studies about rice TFs.
ExoGAN: Retrieving Exoplanetary Atmospheres Using Deep Convolutional Generative Adversarial Networks
Authors: Zingales Tiziano , Waldmann Ingo P.
Published: November 2018

Atmospheric retrievals on exoplanets usually involve computationally intensive Bayesian sampling methods. Large parameter spaces and increasingly complex atmospheric models create a computational bottleneck forcing a trade-off between statistical sampling accuracy and model complexity. It is especially true for upcoming JWST and ARIEL observations. We introduce ExoGAN, the Exoplanet Generative Adversarial Network, a new deep-learning algorithm able to recognize molecular features, atmospheric trace-gas abundances, and planetary parameters using unsupervised learning. Once trained, ExoGAN is widely applicable to a large number of instruments and planetary types. The ExoGAN retrievals constitute a significant speed improvement over traditional retrievals and can be used either as a final atmospheric analysis or provide prior constraints to subsequent retrieval.
Structural Investigation of Silicon Carbide X Grains: Constraints on Condensation in Supernova Ejecta
Authors: Kodolányi János , Vollmer Christian , Hoppe Peter , Müller Maren
Published: November 2018

We analyzed seven presolar SiC grains of supernova origin (average diameter: 1–2 μm) with transmission electron microscopy. Five grains are polycrystalline, whereas two grains are single crystals. Individual crystal domains of polycrystalline grains are in epitaxial relationship, with two grains consisting almost entirely of twinned crystal domains. Most grains are free of inclusions (only one TiC inclusion and one iron- and nickel-rich inclusion were found in two separate grains). Almost all crystals have cubic symmetry (3C polytype), but we found hexagonal SiC (6H polytype) in two grains. The large range of crystal domain sizes (average diameter: 50–970 nm), as well as the larger fraction of noncubic SiC polytypes in supernova grains relative to SiC grains that crystallized in the winds of asymptotic giant branch (AGB) stars, suggest that SiC condensation in supernova ejecta occurs at a larger range of chemical and physical conditions, including supersaturation, than in the winds of AGB stars. Modeling condensation of SiC struggles to produce SiC grains as large as, or bigger than, observed here, if condensation of large (i.e., several μm in diameter) graphite grains is to precede that of SiC, which is suggested by the presolar grain record and published equilibrium condensation models. We propose that future models of graphite and SiC condensation in SN ejecta explore higher ejecta densities than before, as well as gas compositions that are more silicon- and carbon-rich. Furthermore, we infer that some supernova SiC grains may have formed without prior condensation of graphite from their parent gas.
Optimizing Pulsar Timing Array Observational Cadences for Sensitivity to Low-frequency Gravitational-wave Sources
Authors: Lam M. T.
Published: November 2018

Observations of low-frequency gravitational waves (GWs) will require the highest possible timing precision from an array of the most spin-stable pulsars. We can improve the sensitivity of a pulsar timing array (PTA) to different GW sources by observing pulsars with low timing noise over years to decades and distributed across the sky. We discuss observing strategies for a PTA focused on a stochastic GW background such as from unresolved supermassive black hole binaries as well as focused on single continuous-wave sources. First, we describe the method to calculate a PTA’s sensitivity to different GW-source classes. We then apply our method to the 45 pulsars presented in the North American Nanohertz Observatory for the GW 11 year data set. For expected amplitudes of the stochastic background, we find that all pulsars contribute significantly over the timescale of decades; the exception is for very pessimistic values of the stochastic-background amplitude. For individual single sources, we find that a number of pulsars contribute to the sensitivity of a given source, but that which pulsars contribute is different depending on the source, or versus an all-sky metric. Our results seem robust to the presence of red noise in pulsar arrival times. It is critical to obtain more robust pulsar-noise parameters as they heavily affect our results. Our results show that it is also imperative to locate and time as many high-precision pulsars as possible, as quickly as possible, to maximize the sensitivity of next-generation PTA detectors.
A Large Moving Group within the Lower Centaurus Crux Association
Authors: Goldman Bertrand , Röser Siegfried , Schilbach Elena , Moór Attila C. , Henning Thomas
Published: November 2018

Scorpius–Centaurus is the nearest OB association, and its hundreds of members are divided into subgroups, including the Lower Centaurus Crux (LCC). Here we study the dynamics of the LCC area. We report the revelation of a large moving group containing more than 1800 intermediate- and low-mass young stellar objects and brown dwarfs that escaped identification until Gaia DR2 allowed a kinematic and photometric selection to be performed. We investigate the stellar and substellar content of this moving group using the Gaia DR2 astrometric and photometric measurements. The median distance of the members is 114.5 pc, and 80% lie between 102 and 135 pc from the Sun. Our new members cover a mass range of 0.02–5 M
⊙ and add up to a total mass of about 700 M
⊙. The present-day mass function follows a log-normal law with m

c
 = 0.22 M
⊙ and σ = 0.64. We find more than 200 brown dwarfs in our sample. The star formation rate had its maximum of

about 9 Myr ago. We grouped the new members into four denser subgroups, which have increasing age from 7 to 10 Myr, surrounded by “free-floating” young stars with mixed ages. Our isochronal ages, now based on accurate parallaxes, are compatible with several earlier studies of the region. The whole complex is presently expanding, and the expansion started between 8 and 10 Myr ago. Two hundred members show infrared excess compatible with circumstellar disks from full to debris disks. This discovery provides a large sample of nearby young stellar and substellar objects for disk and exoplanet studies.
Bunching Coherent Curvature Radiation in Three-dimensional Magnetic Field Geometry: Application to Pulsars and Fast Radio Bursts
Authors: Yang Yuan-Pei , Zhang Bing
Published: November 2018

The extremely high brightness temperatures of pulsars and fast radio bursts (FRBs) require their radiation mechanisms to be coherent. Coherent curvature radiation from bunches has been long discussed as the mechanism for radio pulsars and recently for FRBs. Assuming that bunches are already generated in pulsar magnetospheres, we calculate the spectrum of coherent curvature radiation under a three-dimensional magnetic field geometry. Different from previous works assuming parallel trajectories and a monoenergetic energy distribution of electrons, we consider a bunch characterized by its length, curvature radius of the trajectory family, bunch opening angle, and electron energy distribution. We find that the curvature radiation spectra of the bunches are characterized by a multisegment broken power law, with the break frequencies depending on bunch properties and trajectory configuration. We also emphasize that in a pulsar magnetosphere, only the fluctuation of net charges with respect to the background (Goldreich–Julian) outflow can make a contribution to coherent radiation. We apply this model to constrain the observed spectra of pulsars and FRBs. For a typical pulsar (

, P = 0.1 s), a small fluctuation of the net charge δn
GJ ∼ 0.1n
GJ can provide the observable flux. For FRBs, the fluctuating net charge may be larger due to its abrupt nature. For δn
GJ ∼ n
GJ, a neutron star with a strong magnetic field and fast rotation is required to power an FRB in the spindown-powered model. The requirement is less stringent in the cosmic comb model thanks to the larger cross section and compressed charge density of the bunch made by the external astrophysical stream that combs the magnetosphere.
The Dynamical Mass and Evolutionary Status of the Type II Cepheid in the Eclipsing Binary System OGLE-LMC-T2CEP-211 with a Double-ring Disk*

†
Authors: Pilecki Bogumił , Dervişoğlu Ahmet , Gieren Wolfgang , Smolec Radosław , Soszyński Igor , Pietrzyński Grzegorz , Thompson Ian B. , Taormina Mónica
Published: November 2018

We present the analysis of a peculiar W Virginis (pWVir) type II Cepheid, OGLE-LMC-T2CEP-211 (P
puls = 9.393 days), in a double-lined binary system (P
orb = 242 days), which shed light on virtually unknown evolutionary status and structure of pWVir stars. The dynamical mass of the Cepheid (first ever for a type II Cepheid) is 0.64 ± 0.02 M
⊙, and the radius R = 25.1 ± 0.3 R
⊙. The companion is a massive (5.67 M
⊙) main-sequence star obscured by a disk. Such a configuration suggests a mass transfer in the system history. We found that originally the system (

 = 12 days) was composed of 3.5 and 2.8 M
⊙ stars, with the current Cepheid being more massive. The system age is now ∼200 Myr, and the Cepheid is almost completely stripped of hydrogen, with helium mass of ∼92% of the total mass. It finished transferring the mass 2.5 Myr ago and is evolving toward lower temperatures passing through the instability strip. Comparison with observations indicates a reasonable 2.7 × 10−8
M
⊙ yr−1 mass loss from the Cepheid. The companion is most probably a Be main-sequence star with T = 22,000 K and R = 2.5 R
⊙. Our results yield a good agreement with a pulsation theory model for a hydrogen-deficient pulsator, confirming the described evolutionary scenario. We detected a two-ring disk (R
disk ∼ 116 R
⊙) and a shell (R
shell ∼ 9 R
⊙) around the companion, which is probably a combination of the matter from the past mass transfer, the mass being lost by the Cepheid owing to wind and pulsations, and a decretion disk around a rapidly rotating secondary. Our study, together with observational properties of pWVir stars, suggests that the majority of them are products of a similar binary evolution interaction.
Model-independent Curvature Determination from Gravitational-wave Standard Sirens and Cosmic Chronometers
Authors: Wei Jun-Jie
Published: November 2018

The detection of gravitational waves (GWs) provides a direct way to measure the luminosity distance, which enables us to probe cosmology. In this paper, we continue to expand the application of GW standard sirens in cosmology, and propose that the spatial curvature can be estimated in a model-independent way by comparing the distances from future GW sources and current cosmic-chronometer observations. We expect an electromagnetic counterpart of the GW event to give the source redshift, and simulate hundreds of GW data from the coalescence of double neutron stars and black hole–neutron star binaries using the Einstein Telescope as a reference. Our simulations show that, from 100 simulated GW events and 31 current cosmic-chronometer measurements, the error of the curvature parameter Ω
K
is expected to be constrained at the level of ∼0.125. If 1000 GW events were observed, the uncertainty of Ω
K
would be further reduced to ∼0.040. We also find that adding 50 mock H(z) data points (consisting of 81 cosmic-chronometer data points and 1000 simulated GW events) could result in a much tighter constraint on the zero cosmic curvature, for which Ω
K
 = −0.002 ± 0.028. Compared to some actual model-independent curvature tests involving distances from other cosmic probes, this method using GW data achieves constraints with much higher precision.
Diffusion and Concentration of Solids in the Dead Zone of a Protoplanetary Disk
Authors: Yang 楊朝 Chao-Chin 欽 , Mac Low Mordecai-Mark , Johansen Anders
Published: November 2018

The streaming instability is a promising mechanism to drive the formation of planetesimals in protoplanetary disks. To trigger this process, it has been argued that sedimentation of solids onto the mid-plane needs to be efficient, and therefore that a quiescent gaseous environment is required. It is often suggested that dead-zone or disk-wind structure created by non-ideal magnetohydrodynamical (MHD) effects meets this requirement. However, simulations have shown that the mid-plane of a dead zone is not completely quiescent. In order to examine the concentration of solids in such an environment, we use the local-shearing-box approximation to simulate a particle-gas system with an Ohmic dead zone including mutual drag force between the gas and the solids. We systematically compare the evolution of the system with ideal or non-ideal MHD, with or without backreaction drag force from particles on gas, and with varying solid abundances. Similar to previous investigations of dead-zone dynamics, we find that particles of dimensionless stopping time

do not sediment appreciably more than those in ideal magnetorotational turbulence, resulting in a vertical scale height an order of magnitude larger than in a laminar disk. Contrary to the expectation that this should curb the formation of planetesimals, we nevertheless find that strong clumping of solids still occurs in the dead zone when solid abundances are similar to the critical value for a laminar environment. This can be explained by the weak radial diffusion of particles near the mid-plane. The results imply that the sedimentation of particles to the mid-plane is not a necessary criterion for the formation of planetesimals by the streaming instability.
Nearby High-speed Stars in Gaia DR2
Authors: Bromley Benjamin C. , Kenyon Scott J. , Brown Warren R. , Geller Margaret J.
Published: November 2018

We investigate the nature of nearby (10–15 kpc) high-speed stars in the Gaia DR2 archive identified on the basis of parallax, proper motion and radial velocity. Together with a consideration of their kinematic, orbital, and photometric properties, we develop a novel strategy for evaluating whether high-speed stars are statistical outliers of the bound population or unbound stars capable of escaping the Galaxy. Out of roughly 1.5 million stars with radial velocities, proper motions, and 5σ parallaxes, we identify just over 100 high-speed stars. Of these, only two have a nearly 100% chance of being unbound, with an indication that they are not just bound outliers; both are likely hyper-runaway stars. The rest of the high-speed stars are likely statistical outliers. We use the sample of high-speed stars to demonstrate that radial velocity alone provides a poor discriminant of nearby, unbound stars. However, these stars are efficiently identified from the tangential velocity, using just parallax and proper motion. Within the full Gaia DR2 archive of stars with 5σ parallax and proper motion but no radial velocity, we identify a sample of 19 with speeds significantly larger than the local escape speed of the Milky Way based on tangential motion alone.
Miscellanea Miridologica V. Taxonomy and chorology of new or little known taxa of Continental New Guinea and neighboring islands (Insecta, Heteroptera, Miridae)
Authors: Chérot Frédéric
Published: November 2018

Gressitocorishenryi (Deraeocorinae, Deraeocorini) is described as a new species on the basis of the female holotype from Syoubri vill(age), Arfak Mounts, Doberai Peninsula, Papua Barat, Indonesia. Additional data on distribution are provided for 17 species of Cylapinae, Deraeocorinae, Mirinae, Orthotylinae and Phylinae. Trigonotylustenuis is cited for the first time from Papua New Guinea.
Atahualpacoris henryi, a new species of plant bug from Colombia (Heteroptera, Miridae, Mirini)
Authors: Fiuza Ferreira Paulo Sérgio , Lopes Jose Luis Benavides , de Souza Fagner , Ferreira Luciano Santana Fiuza
Published: November 2018

A new species of plant bug in the genus Atahualpacoris Carvalho, tribe Mirini, is described. Morphological characters differentiating Atahualpacoris from the related genus Calocorisca are provided, and a diagnosis of each known species of Atahualpacoris is presented. Specimens of the new species were collected by light trap in a natural ecosystem of the Andes Mountains, Department of Tolima, Colombia. The adult and male genitalia are illustrated.
Sulawesimetopus henryi, a new genus and species of Isometopinae (Hemiptera, Heteroptera, Miridae) from Sulawesi
Authors: Herczek Aleksander , Gorczyca Jacek , Taszakowski Artur
Published: November 2018

A new genus and species, Sulawesimetopushenryi Herczek, Gorczyca & Taszakowski, sp. n., are described from Sulawesi, Indonesia. Photographs of the male and female habitus and male genitalia are presented and a short comparison with morphologically similar genera is drawn.
A new genus and two new species of South American Myodochini (Hemiptera, Heteroptera, Rhyparochromidae)
Authors: Dellapé Pablo M. , Melo María Cecilia , Montemayor Sara I.
Published: November 2018

The new Neotropical genus Henryaria (Heteroptera, Rhyparochromidae, Myodochini) is established to accommodate two new species from Bolivia and Peru. Photographs of the types and their male genitalia are provided. Similarities with other genera of the tribe are discussed, as well as the characters to distinguish the two new species.
Henryognathus thomasi, a new genus and new species of Arctostaphylos-feeding plant bug from western North America (Miridae, Phylinae, Phylini)
Authors: Schuh Randall T. , Salas Ruth
Published: November 2018

Henryognathus, new genus, with the single included new species H.thomasi, is described from western North America. The taxon is recorded as feeding on species of Arctostaphylos (Ericaceae) in California and Arizona. Coloration and many morphological attributes are similar to species of Plagiognathus Fieber, but the structure of the male genitalia is distinctive.
Review of the Neotropical genus Rhyncholepta with descriptions of three new species-group taxa (Hemiptera, Heteroptera, Pentatomidae)
Authors: Kment Petr , Eger, Jr. Joe E. , Rider David A.
Published: November 2018

The genusRhyncholeptaBergroth, 1911 (Hemiptera: Heteroptera: Pentatomidae: Pentatominae: Chlorocorini) is redescribed and five species-group taxa are recognized, keyed, their diagnostic characters illustrated, and the distribution reviewed. Among the five taxa, two species and one subspecies are recognized as new:RhyncholeptagrandicallosagrandicallosaBergroth, 1911 (Brazil, Ecuador, French Guiana, Guyana, Peru, Suriname),Rhyncholeptagrandicallosacentroamericanasubsp. n.(Belize, Costa Rica, Guatemala, Mexico, Panama),Rhyncholeptahenryisp. n.(French Guiana),RhyncholeptameinanderiBecker & Grazia-Vieira, 1971 (Bolivia, Brazil, Ecuador, Peru), andRhyncholeptawheelerisp. n.(Guyana). The structure of the male genital capsule was found to be the only reliable character for identifying species-group taxa. For this reason, a simultaneous application has been submitted to the International Commission on Zoological Nomenclature to set aside the non-informative female lectotype ofRhyncholeptagrandicallosagrandicallosaand replace it with the male neotype suggested herein. Based on the available label data and our field experience, most of the specimens were collected by various types of light traps in or near dense forests. Adults can be collected throughout the year.
A new species of Zetekella Drake from Ecuador with comments on Zetekella and Minitingis Barber (Heteroptera, Tingidae)
Authors: Guidoti Marcus , Guilbert Eric
Published: November 2018

ZetekellaandMinitingis(Heteroptera, Tingidae) are morphologically similar genera, each comprising two species. The latter was already considered a junior synonym of the former, but was revalidated on the basis of the number of cephalic spines, projections on the paranotal edge, length of the rostrum, presence of an abdominal groove and distributional pattern. Here, a new species ofZetekellais described from Ecuador, the diagnoses for both genera reassessed, new records forZ.pullaandZ.zetekireported, and a key to the species of both genera provided.
A new Cervinotaptera species from northern Madagascar (Hemiptera, Heteroptera, Aradidae)
Authors: Baňař Petr , Heiss Ernst
Published: November 2018

A new species,Cervinotapteratomhenryi,sp. n.(Hemiptera: Heteroptera: Aradidae: Mezirinae), from Montagne d’Ambre National Park in northern Madagascar is described and illustrated. The newly described species is compared with the only other known species,CervinotapteraguilbertiHeiss & Marchal, 2012.
A Comparison of Radiographic Joint Space Width Measurements Versus Ultrasonographic Assessment of Cartilage Thickness in Children with Juvenile Idiopathic Arthritis
Authors: Pradsgaard Dan Østergaard , Hørlyck Arne , Spannow Anne Helene , Heuck Carsten , Herlin Troels
Published: November 2018

Objective.

Joint space narrowing (JSN) is a measurable outcome of tissue degeneration in arthritis. JSN is usually assessed by conventional radiography. Ultrasonographic (US) measurement of joint cartilage thickness has been validated in healthy children, and US measurement of the distal femoral cartilage has been validated in a group of patients with juvenile idiopathic arthritis (JIA). Our aim was to compare the measures of cartilage thickness of the proximal cartilage site in the second metacarpophalangeal (MCP), second proximal interphalangeal (PIP), and knee joints as assessed by US to joint space width (JSW) as measured by computerized radiography in children with JIA.

Methods.

The study included 74 children with JIA aged 5–15 years (median 11.3 yrs). MCP and PIP joints were assessed at one midline spot. Knee joints were assessed at the medial and lateral femoral condylar areas. Only the proximal cartilage site in the joints was assessed by US, whereas the complete JSW was assessed by radiography.

Results.

We assessed 136 second MCP, 138 second PIP, and 146 knee joints. We found a high level of agreement between US and radiographic measures of cartilage thickness and JSW: r = 0.82–0.86 (second MCP), r = 0.50–0.55 (second PIP), and r = 0.52–0.81 (knee); p < 0.001 for all 8 assessed sites.

Conclusion.

US measurements of cartilage thickness of the proximal site of the second MCP, second PIP, and knee joints correlated well with radiographic JSW measurements in the finger and knee joints of children with JIA. However, US does not measure the distal cartilage, which may limit its use in the assessment of JSN.
Fertility and Ovarian Reserve among Women with Rheumatoid Arthritis
Authors: Eudy Amanda M. , McDaniel Gary , Hurd William W. , Clowse Megan E.B.
Published: November 2018

Objective.

We sought to identify causes for infertility in women with and without rheumatoid arthritis (RA).

Methods.

Women with RA were matched to healthy controls. Differences in anti-Müllerian hormone (AMH) and anovulation were analyzed.

Results.

Women with RA had lower AMH (β −1.05, 95% CI −2.09 to −0.005), but no difference was observed when AMH was log-transformed. No difference in anovulation was observed. Infertility prevalence was similar between groups, primarily attributable to polycystic ovary syndrome in healthy controls but largely unexplained in women with RA.

Conclusion.

AMH was lower in women with RA, but reasons for infertility among women with RA remain unknown.
Regards croisés sur la patrimonialité et la conservation de l’héritage traditionnel en Tunisie aux xix e et xx e siècles
Authors: Matri Faiza Bruscella
Published: November 2018

Au cours du Protectorat français en Tunisie, la conservation du patrimoine architectural traditionnel a été assurée par l’intervention conjointe de deux structures différentes. Il s’agit de l’administration du Protectorat et des institutions locales qui se référaient à des assises culturelles et des pratiques de conservation différentes. S’appuyant sur la documentation de cette époque, l’article se voue à présenter en premier lieu les notions du patrimoine et de la conservation selon les diverses connotations tout en présentant l’organisation et le rôle de la fondation autochtone habus , qui constituait une institution de droit musulman, et qui selon sa propre logique a contribué à la sauvegarde du Patrimoine traditionnel. La seconde partie se rapporte au processus de patrimonialisation qui n’est pas dépourvu de lourdeur et malentendus.
TOWARDS AN AUTOMATIC DIAGNOSIS SYSTEM FOR LUMBAR DISC HERNIATION: THE SIGNIFICANCE OF LOCAL SUBSET FEATURE SELECTION
Authors: Ebrahimzadeh Elias , Fayaz Farahnaz , Nikravan Mehran , Ahmadi Fereshteh , Dolatabad Mohammadjavad Rahimi
Published: November 2018

Herniation in the lumbar area is one of the most common diseases which results in lower back pain (LBP) causing discomfort and inconvenience in the patients’ daily lives. A computer aided diagnosis (CAD) system can be of immense benefit as it generates diagnostic results within a short time while increasing precision of diagnosis and eliminating human errors. We have proposed a new method for automatic diagnosis of lumbar disc herniation based on clinical MRI data. We use T2-W sagittal and myelograph images. The presented method has been applied on 30 clinical cases, each containing 7 discs (210 lumbar discs) for the herniation diagnosis. We employ Otsu thresholding method to extract the spinal cord from MR images of lumbar disc. A third order polynomial is then aligned on the extracted spinal cords, and by the end of preprocessing stage, all the T2-W sagittal images will have been prepared for specifying disc boundary and labeling. Having extracted an ROI for each disc, we proceed to use intensity and shape features for classification. The extracted features have been selected by Local Subset Feature Selection. The results demonstrated 91.90%, 92.38% and 95.23% accuracy for artificial neural network, K-nearest neighbor and support vector machine (SVM) classifiers respectively, indicating the superiority of the proposed method to those mentioned in similar studies.
On Thermal Stability Analysis of a Convective and Radiative Slab of Variable Thermal Conductivity with Reactant Consumption
Authors: Lebelo Ramoshweu Solomon , Moloi K.C. , Chitumwa C.C. , Sadiki M.W.R. , Baloyi P. , Adesanya S.O.
Published: November 2018

Thermal stability in a stockpile of reactive materials that are assumed to lose heat to the surrounding environment by convection and radiation is studied in this article. The reactant (O2) consumption is also considered and the investigation is modeled in a rectangular slab. The complicated combustion process results with nonlinear interactions and therefore, the nonlinear differential equations governing the problem are solved numerically with the Runge-Kutta Fehlberg Method (RKF45) that is coupled with the Shooting Technique. The behaviors of the temperature and the reactant, due to effects of some embedded kinetic parameters, are depicted graphically and discussed accordingly. The results show that kinetic parameters that increase the temperature of the system, correspondingly increase the reactant consumption.
Proterozoic basins of Canada: Early Proterozoic sequences in Labrador
Authors: Wardle R J , Bailey D G
Published: November 2018

Early Proterozoic ( Aphebian) sedimentary and volcanic rocks in Labrador are described from two tectonic belts: the Churchill Province of western Labrador, and the Makkovik Subprovince of eastern Labrador. The Aphebian in the Churchill Province is represented
mainly by the Labrador Trough ( Kaniapiskau Supergroup) but also in the Laporte Croup, Lake Harbour Formation and Petscapiskau Croup. The Labrador Trough is the most completely exposed of these sequences and displays a transition {rom shelf sedimentation in the west, to deeper water basinal
conditions in the east. Rifting along the eastern margin of the Labrador Trough may have produced a narrow proto-oceanic rift during this stage. Aphebian sequences in the Makkovik Subprovince are represented by the Maran Lake and Aillik groups. The Maran Lake and lower Aillik groups were deposited
in environments broadly similar to those of the Churchill Province and in approximately the same time. The upper Aillik Group (17 50-1670 Ma) represents a younger assemblage dominated by f elsic volcanics intricately intruded by granites and may indicate the onset of radically diff erent tectonic
conditions towards the end of Aphebian time.
Prof. Dr. B. J. Engelbrecht, Hoogleraar vir 25 jaar
Authors: Oberholzer J.P.
Published: November 2018

No abstract available.
Pastoraat vir die ouetehuise
Authors: Koekemoer P.J. Theo
Published: November 2018

No abstract available.
Epithelioid Sarcoma Presenting as Recurrent Thumb Ulcer: A Lesson to Learn
Authors: Rajeev Lakkavalli Krishnappa , Asati Vikas , Mallekavu Suresh Babu , Babu K Govind , Champka G
Published: November 2018

Epithelioid sarcoma (ES) first described by Enzinger in 1970,1 is a rare soft-tissue sarcoma typically presenting as a subcutaneous or deep dermal mass in distal portions of the extremities of adolescents and young adults. They are frequently mistaken for ulcers, abscesses, or infected warts that fail medical management. Patients often develop multiple local recurrences of long duration, with subsequent metastases in 30%–50% of cases.2 We here report a case of left thumb ES that presented as an ulcer and subsequently metastasized to the forearm, arm, axillary lymph nodes, and lungs.
Revised Myeloproliferative Neoplasms Working Group Consensus Recommendations for Diagnosis and Management of Primary Myelofibrosis, Polycythemia Vera, and Essential Thrombocythemia
Authors: Agarwal Mohan B , Malhotra Hemant , Chakarborti Prantar , Varma Neelam , Mathews Vikram , Bhattacharyya Jina , Seth Tulika , Gyathri K , Menon Hari , Subramanian P G , Sharma Ajay K , Bhattacharyya Maitreyee , Mehta Jay , Shah Sandeep , Gogoi P K , Nair Reena , Agarwal Usha , Varma Subhash , Prasad S V V S , Mishra Deepak K
Published: November 2018

Myeloproliferative neoplasms (MPNs) are clonal disorders, derived from abnormal hematopoietic stem cells and result in an excessive production of blood cells. This MPN group of conditions encompasses different diseases with overlapping clinical and biologic similarities. The majority of the conventional therapies of MPN are palliative in nature. However, with the discovery of Janus Kinase 2 (JAK2) mutation and development of targeted JAK1/2 inhibition therapy, the therapeutic options in treatment landscape have changed dramatically. This article presents the revised Indian MPNs Working Group consensus recommendations. It highlights and brings into attention about the recent findings that have defined the state of the art of the diagnosis and therapy in the MPN area, including identification of the new driver and prognostic mutations, treatment goals in the management of myelofibrosis and polycythemia vera (PV), role of the recently approved, targeted tyrosine kinase inhibitor ruxolitinib in PV, and special issues such MPN consideration in patients with splenic vein thrombosis and the management of the disease in pregnancy.
Opportunistic Screening for Detection and Socio-epidemiological Risk Assessment of Oral Cancer Patients in Rural Jodhpur, India
Authors: Meena Jitendra Kumar , Verma Anjana , Upadhyay Sandeep Kumar
Published: November 2018

Background: Globally, India has a high burden (20%) of oral cancer with 1% prevalence of premalignant lesions. Most cases are attributed to modifiable risk factors such as substance abuse (tobacco and alcohol), dietary deficiencies, and environmental exposures (solar radiation and air pollution) aggravated by delayed detection and care especially in rural areas. Objective: The objective of the study was to study the risk factors of oral cancer pathogenesis among the rural residents of Jodhpur, India, through opportunistic oral screening approach at primary care facilities. Methodology: An unmatched case–control study was done at two randomly chosen rural health centres in Jodhpur, India. A total of 84 cases and 168 controls were included during 6 months study period (2016). Randomly selected outpatient department attendees were interviewed and screened for oral cancer and premalignant lesions. A structured questionnaire interview along with comprehensive oral, head and neck examination was conducted. Data were analyzed using multivariate logistic regression, and confidentiality of data was maintained. Results: The majority of the study participants were rural residents (82.9%) with poor socioeconomic status. Opportunistic oral screening revealed a variety of cancerous and precancerous lesions. Most common case pathologies were submucosal fibrosis (40.5%), inadequate mouth opening (35.7%), cheek bites (28.6%), leukoplakia (23.8%) etc. Multivariate analysis suggested that tobacco intake (adjusted odds ratio = 13.6, P ≤ 0.01) dietary deficiency (7.4, <0.01), oral sepsis (7.0, <0.01), oral lesions (6.8, <0.01), and sun radiation exposure (9.5, <0.01) were significantly associated with oral cancer pathology. Conclusion: The study provides strong evidence that tobacco, dietary deficiency, oral sepsis and lesions, and sun radiation exposure are independent risk factors for oral cancer. It also reiterates the importance and application of opportunistic oral cancer screening at primary care level.
Assessment of Potential Drug–Drug Interactions in an Oncology Unit of a Tertiary Care Teaching Hospital
Authors: Vayalil Ramya Kuzhikattu , Shetty K Jayarama , Mateti Uday Venkat
Published: November 2018

Context: Drug interactions are more common in cancer patients because they consume several medicines such as hormonal substances, anticancer drugs, and adjuvant drugs to treat comorbidities. Objectives: To assess the pattern of potential drug–drug interactions (pDDIs) in an oncology unit of a tertiary care teaching hospital. Materials and Methods: A prospective observational study was carried out for 8 months (August 2016 to March 2017). Data on drugs were collected by reviewing the patients’ medical records. The drug interactions fact software version such as Micromedex electronic database system, drugs.com interaction checker, and Medscape multidrug interaction checker tool were used to identify and analyze the pattern of pDDIs. Results: A total of 180 patients were enrolled during the study period. Among them, 152 study patients had 84.44% of pDDIs. Male predominance (64.4%) was noted over female (35.6%). According to the severity of classification of pDDIs, majority of them were moderate (63.1%) followed by major (26.1%) and minor (10.1%) interactions. The interactions that potentially cause QT interval prolongation and irregular heartbeat were the common outcomes of pDDIs. Conclusions: The incidence of pDDIs among cancer patients was 84.44%. The most common interacting drug pair in the study population was found to be dexamethasone + aprepitant [41 (26.9%)] followed by cisplatin + dexamethasone [32 (21.05%)] and other interacting pairs. To avoid harmful effects, screening of pDDIs should take place before administering the therapy.
A Case of Mistaken Identity: Glutaric Aciduria Type I Masquerading as Postmeningitic Hydrocephalus
Authors: Rajani Heena , Grover Shabnam Bhandari , Antil Neha , Katyan Amit
Published: November 2018

We report the characteristic neuroimaging features of a rare metabolic leukodystrophy in an 8-year-old boy, born of consanguineous parenthood. The child presented with macrocrania, regression of milestones, and dystonia. The patient was referred for magnetic resonance imaging with a clinical diagnosis of postmeningitic hydrocephalus. Imaging revealed ventriculomegaly, diffuse brain atrophy, bilaterally symmetric widened sylvian fissure with temporal lobe hypoplasia, periventricular white-matter hyperintensities, and atrophy with hyperintensity in bilateral basal ganglia was also seen. These imaging features were signatory to arrive at a diagnosis of glutaric aciduria type 1. This disorder may mimic other neurological diseases such as postmeningitic hydrocephalus, which delays the diagnosis. Since early diagnosis and treatment can arrest progression, increased awareness about this condition among radiologists will certainly prevent erroneous diagnosis as had occurred in our patient.
Tits Triangles
Authors: Mühlherr Bernhard , Weiss Richard M.
Published: November 2018

A Tits polygon is a bipartite graph in which the neighborhood of every vertex is endowed with an “opposition relation” satisfying certain properties. Moufang polygons are precisely the Tits polygons in which these opposition relations are all trivial. There is a standard construction that produces a Tits polygon whose opposition relations are not all trivial from an arbitrary pair $(\unicode[STIX]{x1D6E5},T)$, where $\unicode[STIX]{x1D6E5}$ is a building of type $\unicode[STIX]{x1D6F1}$, $\unicode[STIX]{x1D6F1}$ is a spherical, irreducible Coxeter diagram of rank at least $3$, and $T$ is a Tits index of absolute type $\unicode[STIX]{x1D6F1}$ and relative rank $2$. A Tits polygon is called $k$-plump if its opposition relations satisfy a mild condition that is satisfied by all Tits triangles coming from a pair $(\unicode[STIX]{x1D6E5},T)$ such that every panel of $\unicode[STIX]{x1D6E5}$ has at least $k+1$ chambers. We show that a $5$-plump Tits triangle is parametrized and uniquely determined by a ring $R$ that is alternative and of stable rank $2$. We use the connection between Tits triangles and the theory of Veldkamp planes as developed by Veldkamp and Faulkner to show existence.
Global IWV trends and variability in atmospheric reanalyses and GPS observations
Authors: Parracho Ana C. , Bock Olivier , Bastin Sophie
Published: November 2018

Abstract. This study investigates the means, variability, and trends in
integrated water vapour (IWV) from two modern reanalyses (ERA-Interim and
MERRA-2) from 1980 to 2016 and ground-based GPS data from 1995 to 2010. It is
found that the mean distributions and inter-annual variability in IWV in the
reanalyses and GPS are consistent, even in regions of strong gradients.
ERA-Interim is shown to exhibit a slight moist bias in the extra-tropics and
a slight dry bias in the tropics (both on the order of 0.5 to 1 kg m−2)
compared to GPS. ERA-Interim is also generally drier than MERRA-2 over the
ocean and within the tropics. Differences in variability and trends are pointed
out at a few GPS sites. These differences can be due to representativeness
errors (for sites located in coastal regions and regions of complex topography),
gaps and inhomogeneities in the GPS series (due to equipment changes), or
potential inhomogeneities in the reanalyses (due
to changes in the observing system). Trends in
IWV and surface temperature in ERA-Interim and MERRA-2 are shown to be
consistent, with positive IWV trends generally correlated with surface
warming, but MERRA-2 presents a more general global moistening trend compared
to ERA-Interim. Inconsistent trends are found between the two reanalyses over
Antarctica and most of the Southern Hemisphere, and over central and northern
Africa. The uncertainty in current reanalyses remains quite high in these
regions, where few in situ observations are available, and the spread between
models is generally important. Inter-annual and decadal variations in IWV are
also shown to be strongly linked with variations in the atmospheric
circulation, especially in arid regions, such as northern Africa and Western
Australia, which add uncertainty in the trend estimates, especially over the
shorter period. In these regions, the Clausius–Clapeyron scaling ratio is
found not to be a good humidity proxy for inter-annual variability and decadal
trends.
Climatology of the mesopause density using a global distribution of meteor radars
Authors: Yi Wen , Xue Xianghui , Reid Iain M. , Murphy Damian J. , Hall Chris M. , Tsutsumi Masaki , Ning Baiqi , Li Guozhu , Vincent Robert A. , Chen Jingsong , Wu Jianfei , Chen Tingdi , Dou Xiankang
Published: November 2018

Abstract. The existing distribution of meteor radars located from high- to low-latitude regions provides a favourable temporal and spatial coverage for investigating the climatology of the global mesopause density. In this study, we report the climatology of the mesopause density estimated using multiyear observations from nine meteor radars, namely, the Davis Station (68.6° S, 77.9° E), Svalbard (78.3° N, 16° E) and Tromsø (69.6° N, 19.2° E) meteor radars located at high latitudes, the Mohe (53.5° N, 122.3° E), Beijing (40.3° N, 116.2° E), Mengcheng (33.4° N, 116.6° E) and Wuhan (30.5° N, 114.6° E) meteor radars located in the mid-latitudes, and the Kunming (25.6° N, 103.8° E) and Darwin (12.3° S, 130.8° E) meteor radars located at low latitudes. The daily mean density was estimated using ambipolar diffusion coefficients derived from the meteor radars and temperatures from the Microwave Limb Sounder (MLS) on board the Aura satellite. The seasonal variations in the Davis Station meteor radar densities in the southern polar mesopause are mainly dominated by an annual oscillation (AO). The mesopause densities observed by the Svalbard and Tromsø meteor radars at high latitudes and the Mohe and Beijing meteor radars at high mid-latitudes in the Northern Hemisphere show mainly an AO and a relatively weak semiannual oscillation (SAO). The mesopause densities observed by the Mengcheng and Wuhan meteor radars at lower mid-latitudes and the Kunming and Darwin meteor radars at low latitudes show mainly an AO. The SAO is evident in the Northern Hemisphere, especially at high latitudes, and its largest amplitude, which is detected at the Tromsø meteor radar, is comparable to the AO amplitudes. These observations indicate that the mesopause densities over the southern and northern high latitudes exhibit a clear seasonal asymmetry. The maxima of the yearly variations in the mesopause densities display a clear temporal variation across the spring equinox as the latitude decreases; these latitudinal variation characteristics may be related to latitudinal changes influenced by gravity wave forcing. In addition to an AO, the mesopause densities over low latitudes also clearly show a variation with a periodicity of 30–60 days related to the Madden-Julian oscillation in the subtropical troposphere.
Imágenes realistas contra imágenes plásticas. Variaciones de la imagen cinematográfica en "Gravity" de Alfonso Cuarón y en "Speed Racer" de Lily y Lana Wachowski
Authors: Alvarado Carlos F. , Escobar José W.
Published: November 2018

Este artículo, producto de investigación, pretende mostrar cómo opera la imagen en el cine contemporáneo que se sitúa en una narrativa propia de la falsificación y la simulación. Se revela que cualquier efecto de la realidad siempre es producto de las fuerzas textuales que o simulan cierta naturalidad (fruto de un punto de vista realista) o tienden a la falsificación directa (corolario de la ausencia de cualquier credo metafísico). De igual manera, se hace un desplazamiento del concepto clásico de imagen (como doble) para reconocer los cambios estructurales de un cine que recupera parte del clasicismo de Hollywood y parte de la modernidad europea. Siguiendo directrices de los estudios de caso, a partir de una muestra opinática (intencional, no estadística), se toma como corpus (unidad de trabajo) dos filmes: Gravity (2013) de Alfonso Cuarón y Speed Racer (2007) de Lily y Lana Wachowski.
Crítica y producción artística en el capitalismo académico: de la crisis del modelo empresarial de universidad al giro educativo en las pedagogías del arte
Authors: Mira Enric , Guirao Cristina
Published: November 2018

El concepto de educación ha sido objeto del arte social y político desde la década de los 60 y 70 del siglo XX, sin embargo los planteamientos artísticos de carácter crítico sobre la educación superior universitaria han sido puntuales y poco conocidos. Partiendo del diagnóstico de una “universidad en ruinas” en el contexto de un “capitalismo académico”, el presente artículo propone, en primer lugar, el análisis de las producciones artísticas de Ian Wallace y Antoni Muntadas donde se ha desarrollado específicamente una crítica de la universidad como institución académica y educativa. Ambos planteamientos reflexionan sobre la aparición de la universidad empresarial a partir de la crisis del paradigma humboldtiano de universidad y del fracaso del ideal ilustrado de emancipación de la humanidad a través del progreso científico. A continuación se analiza cómo, desde una serie de prácticas artísticas contemporáneas, algunas de ellas surgidas en torno al llamado “giro educativo” del arte, se aborda una revisión de las pedagogías artísticas apuntalando una posible vía para la transformación del modelo empresarial universitario.
Pestalotiopsis lijiangensis sp. nov., a new endophytic fungus from Yunnan, China
Authors: Zhou Ying-Ke , Li Fu-Ping , Hou Cheng-Lin
Published: November 2018

A new endophytic fungus, Pestalotiopsis lijiangensis from leaves of Castanopsis carlesii var. spinulosa, is described and illustrated. The new species is similar to P. montellica and P. jesteri in having lateral appendages at the upper conidial septum,
but P. lijiangensis differs from both P. montellica and P. jesteri by its wider conidia with deeply pigmented doliform median cells and additionally from P. jesteri by the production of apical conidial appendages. A phylogenetic analysis of the combined sequence
data of internal transcribed spacer (ITS), partial β-tubulin (tub), and partial translation elongation factor1-α (tef) supports P. lijiangensis on an independent branch within Pestalotiopsis.
Conflicts and Reconciliation at the Port-City Interface in Contemporary European Cities
Authors: Li Ziyue
Published: November 2018

Since ports were first created in coastal and riverbank cities, they have remained an integral part of many cities. As maritime trade developed and required more space and infrastructure, ports have gradually become more specialized for maritime purposes. Since the more recent advent of containerization and globalization, port-city relations have become increasingly complex. Therefore, it is important to investigate methods to resolve the conflicts in port-city interfaces. This paper demonstrates an in-depth research study of the approaches taken by major European ports to reconcile port-city conflicts and provides insight and guidance for port authorities on this issue.
2018/24 Discrimination arising from a disability – no need for knowledge (UK)
Authors: Langhorn Emma
Published: November 2018

2018/24 Discrimination arising from a disability – no need for knowledge (UK)

The Court of Appeal has confirmed that discrimination arising from disability had occurred when an employer dismissed an employee for misconduct which was connected to the employee’s disability, even though the employer had no knowledge of the connection.