bluuebunny/crossref_metadata_2025_split huggingface dataset:
A new approach to generate a catalogue of potential historical novae
Authors: Hoffmann Susanne M. , Vogt Nikolaus , Protte Philipp 
Published: February 2020

AbstractAncient Chinese, Korean, and Vietnamese observers left us records of celestial sightings, the so‐called “guest stars” dated up to ∼2500 years ago. Their identification with modern observable targets could open interesting insights into the long‐term behavior of astronomical objects, as shown by the successful identification of eight galactic supernovae. Here, we evaluate the possibility to identify ancient classical novae with presently known cataclysmic variables (CVs). For this purpose, we have developed a method which reconsiders in detail positions and sizes of ancient asterisms, in order to define areas on the sky that should be used for a search of modern counterparts. These areas range from a few to several 100 square degrees, depending on the details given in ancient texts; they should replace the single coordinate values given by previous authors. Any appropriate target (CVs, X‐ray binaries etc.) within these areas can be considered as a valid candidate for identification with the corresponding ancient event. Based on the original descriptions of several 100 old events, we selected those without movement and without a tail (to exclude comets) and which was not only visible within a certain hour (to exclude meteors). This way, we present a shortlist of 24 most promising events which could refer to classical nova eruptions. Our method is checked by applying it to the known SN identifications, leading to a margin of error between 0 and 4.5 degrees, meaning that some SN remnants lay exactly inside the areas given by the historical reports while in some other cases they are laying at considerable distances.
The Mental and Physical Health of Older Adults With a Genetic Predisposition for Autism
Authors: Stewart Gavin R. , Corbett Anne , Ballard Clive , Creese Byron , Aarsland Dag , Hampshire Adam , Charlton Rebecca A. , Happé Francesca 
Published: February 2020

Autism commonly aggregates in families, with twin studies estimating heritability to be around 80%. Subclinical autism‐like characteristics have also been found at elevated rates in relatives of autistic probands. Physical and psychiatric conditions have been reported at elevated rates in autistic children and adults, and also in their relatives. However, to date, there has been no exploration of how aging may affect this pattern. This study examined cross‐sectional data from the ongoing online PROTECT study. A total of 20,220 adults aged 50 years and older reported whether they have an autistic first‐degree relative. In total, 739 older adults reported having an autistic first‐degree relative (AFDR group) and 11,666 were identified as having no family history of any neurodevelopmental disorder (NFD group). The AFDR group demonstrated significantly higher frequencies of self‐reported psychiatric diagnoses and a greater total number of co‐occurring psychiatric diagnoses than the NFD group. Furthermore, the AFDR group reported elevated current self‐report symptoms of depression, anxiety, traumatic experience, and post‐traumatic stress than the NFD group. By contrast, few differences between AFDR and NFD groups were observed in physical health conditions, and no differences were observed in the total number of co‐occurring physical health diagnoses. These findings suggest that adults who have an AFDR may be at greater risk of poor mental, but not physical, health in later life. Older adults with autistic relatives may benefit from close monitoring to mitigate this susceptibility and to provide timely intervention.Autism Res2020, 13: 641–654. © 2020 The Authors.Autism Research published by International Society for Autism Researchpublished by Wiley Periodicals, Inc.Lay SummaryChildren and adults with an autistic relative have been found to experience more psychiatric difficulties than those with no family links to autism. However, a few studies have explored what happens when these individuals get older. Examining over 20,000 adults age 50+, we found that older adults with an autistic relative experienced elevated rates of most psychiatric conditions but not physical conditions. Older adults with autistic relatives may benefit from close monitoring to mitigate this susceptibility and to provide timely intervention.
Flexibility of the CueR Metal Site Probed by Instantaneous Change of Element and Oxidation State from AgI to CdII
Authors: Balogh Ria K. , Gyurcsik Béla , Jensen Mikael , Thulstrup Peter W. , Köster Ulli , Christensen Niels Johan , Mørch Frederik J. , Jensen Marianne L. , Jancsó Attila , Hemmingsen Lars 
Published: February 2020

AbstractSelectivity for monovalent metal ions is an important facet of the function of the metalloregulatory protein CueR. 111Ag perturbed angular correlation of γ‐rays (PAC) spectroscopy probes the metal site structure and the relaxation accompanying the instantaneous change from AgI to CdII upon 111Ag radioactive decay. That is, a change from AgI, which activates transcription, to CdII, which does not. In the frozen state (−196 °C) two nuclear quadrupole interactions (NQIs) are observed; one (NQI1) agrees well with two coordinating thiolates and an additional longer contact to the S77 backbone carbonyl, and the other (NQI2) reflects that CdII has attracted additional ligand(s). At 1 °C only NQI2 is observed, demonstrating that relaxation to this structure occurs within ≈10 ns of the decay of 111Ag. Thus, transformation from AgI to CdII rapidly disrupts the functional linear bis(thiolato)AgI metal site structure. This inherent metal site flexibility may be central to CueR function, leading to remodelling into a non‐functional structure upon binding of non‐cognate metal ions. In a broader perspective, 111Ag PAC spectroscopy may be applied to probe the flexibility of protein metal sites.
Aluminiumhydroxychlorid‐Flockungsmittel aus dem Kupferrecycling aus Abfällen der Leiterplattenproduktion
Authors: Kononchuk Olga O. , Hippmann Sebastian , Bertau Martin , Alexeev Alexey I. 
Published: February 2020

AbstractBei der Leiterplattenproduktion nach dem Druckverfahren fallen erhebliche Mengen kupferhaltiger Ätzlösungen an. Die Kupferrückgewinnung aus den ammoniakalischen Ätzbädern erfolgt über eine Zementation mit Aluminiumschrott mit Ausbringungsraten ≥ 99 % Cu. Anstelle der bis dato üblichen Deponierung wird die dabei anfallende aluminiumhaltige Lösung zu einem Koagulationsmittel für die Behandlung von Bergbautailings und Abwasser aufbereitet. Das hergestellte Flockungsmittel wurde eingehend charakterisiert und die Wirksamkeit als Koagulant für feindisperse Systeme im Jar‐Test untersucht und bestätigt.
Relationship between genetic variability of flowering traits andFusariummycotoxin contamination in oats
Authors: Herrmann Matthias Heinrich , Hautsalo Juho , Georgieva Paulina , Bund Adalbert , Winter Mark , Beuch Steffen 
Published: February 2020

AbstractOver the last three decades,Fusariuminfections and related mycotoxin contamination have caused significant economic losses in oats (Avena sativaL.). Breeding for resistance is highly prioritized in oats, but infection processes and resistance components againstFusariumspecies are not fully identified. In this study, the genetic variation for flowering traits and its impact on mycotoxin accumulation in oats is described. The first experiment of this paper was focused on flowering traits in 50 oat genotypes (Panel 1) to identify cleistogamic oats. Then, two separateFusarium‐inoculated experiments in three (Panel 2 with 25 genotypes) and two environments (Panel 3 with 16 genotypes) were conducted to assess the relationship between the degree of anther retention (AR) and resistance toFusariuminfestation and mycotoxin accumulation in oats. Panel 2 was inoculated withFusarium culmorum,F. langsethiae, andF. sporotrichioides, and Panel 3 was inoculated with eitherF.graminearumorF. culmorum. The assessment of open flowering score and AR displayed a continuous variation from dominating chasmogamy to complete cleistogamy. Significant differences for deoxynivalenol and T‐2 were found, with a modest correlation between both mycotoxins. The lowest mycotoxin levels were found in two old and one modern cultivar, and the highest levels were found in a dwarf oat cultivar. Compared with plant height, AR was a rather ambiguous factor for the mycotoxin content, and it interfered with effects of other traits displaying high ranges such as earliness, lodging, or hull content. To unravel components of resistance toFusariumin oats more precisely, specific populations with lower ranges in plant height and heading date should be studied.
Ion‐Enhanced Conversion of CO2 into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability
Authors: Piao Guangxia , Yoon Sun Hee , Han Dong Suk , Park Hyunwoong 
Published: February 2020

AbstractInvited for this month′s cover is the group of Prof. Hyunwoong Park at the Kyungpook National University. The image shows the high‐efficiency CO2 conversion to formate using multilayered porous dendrite Bi electrocatalysts. The Full Paper itself is available at 10.1002/cssc.201902581.
Experimental investigation of PV based modified SEPIC converter fed hybrid electric vehicle (PV‐HEV)
Authors: Natchimuthu Selvarani , Chinnusamy Muniraj , Mark Arul Prasanna 
Published: February 2020

SummaryThis paper presents a high gain modified three‐port dual boost single‐ended primary‐inductor converter (SEPIC) converter operated hybrid photovoltaic (PV)/battery electric vehicle to improve the power transfer capability and efficiency of the power conversion stage. The proposed three‐port dual boost high gain SEPIC converter accepts wide voltage range of input then the conventional single stage SEPIC converter. The three‐winding high frequency coupling transformer integrates the two input sources and step‐up the input voltage. The theoretical and experimental analyses are presented to validate the performance of the proposed modified SEPIC converter in boosting the wide range of input voltage. A 6 kW, 12 to 600 V of experimental model has been developed and tested. The efficiency obtained from the designed model is around 94.11%.
Energy‐efficient resource allocation for device‐to‐device communication through noncooperative game theory
Authors: Noor Mohammed Vali Mohamad , Sreenivasan Prithvi Mothi , Ravishankar Tharrun , Hariharan Subramaniyam , Lakshmanan Muthukaruppan 
Published: February 2020

SummaryWireless network with high data rate applications has seen a rapid growth in recent years. This improved quality of service (QoS) leads to huge energy consumption in wireless network. Therefore, in order to have an energy‐efficient resource allocation in cellular system, a device‐to‐device (D2D) communication is the key component to improve the QoS. In this paper, we propose a noncooperative game (NCG) theory approach for resource allocation to improve energy efficiency (EE) of D2D pair. A three‐tier network with macrocell base station (MBS), femtocell base station (FBS), and D2D pair is considered, which shares the uplink resource block. A resource allocation strategy with constraints is arrived, which maintains minimum throughput for each user in the network. The proposed resource allocation strategy optimizes the EE of D2D pair in the three‐tier network, which achieves Nash equilibrium (NE) and Pareto optimality (PO). Simulation results validate that EE is uniform and optimum for all D2D pair, which converges to NE when channel is static and it converges to PO when the channel is dynamic.
Bauakustische Bemessung von Mehrgeschossbauten mit monolithischen Ziegelaußenwänden
Authors: Naumann Kai 
Published: February 2020

AbstractFür Gebäude in Massivbauweise mit monolithischen, hochwärmedämmenden Ziegel‐Außenwänden war nach Beiblatt 1 zu DIN 4109:1989 praktisch keine normative schalltechnische Bemessung möglich. Daher wurde in 2010 ein zulassungsgeregeltes Bemessungsverfahren eingeführt, mit dem bauakustische Berechnungen mit hoher Prognosesicherheit geführt werden können. Dieses Verfahren wurde in die vollständig überarbeitete Normenreihe DIN 4109:2016/2018 ‚Schallschutz im Hochbau‘ übernommen.Grundlage für die Anwendung dieser Methode ist die Kenntnis individueller Schalldämm‐Maße und Stoßstellendämm‐Maße der jeweils verwendeten Ziegel‐Produkte bzw. Produktkombinationen. Zur Vereinfachung der Nachweisführung für Gebäude in Ziegelbauweise stellt die Ziegelindustrie die Bauphysiksoftware ‚Modul Schall 4.0‘ zur Verfügung, in der die maßgebenden schalltechnischen Parameter von Außenwandprodukten zahlreicher Ziegelhersteller in einer Datenbank hinterlegt sind. In diesem Bericht werden Erfahrungen in der Anwendung des Bemessungsverfahrens für Gebäude in Ziegelbauweise vorgestellt. Es zeigt sich eine hohe Übereinstimmung von Prognosen und Prüfungen an ausgeführten Gebäuden.
Application research of a prestressed anchor cable‐pile‐slab wall supporting structure for multistage high fill slopes
Authors: Zhu Yan‐peng , Wei Zhen‐hong , Zhu Qiao‐hong 
Published: February 2020

AbstractWhen carrying out engineering constructions in a mountainous area with complex geological conditions, high fill slopes commonly need to be strengthened. At present, several of the main supporting structures have unique defects and shortcomings when used in the reinforcement of high fill slopes. Therefore, this paper proposes to apply a prestressed anchor cable‐pile‐slab wall structure to high fill slope support engineering, relying on the long‐term monitoring results of an actual project and using the finite difference finite element software FLAC3D to model the supporting structure. The displacement of the slope, the earth pressure behind the pile, the internal force of the supporting structure and the distribution of the anchor cable force are analyzed comprehensively and systematically. The analysis and study show that the prestressed anchor cable‐pile‐slab wall supporting structure can effectively strengthen a filled slope and control its horizontal displacement to improve its overall stability. The analysis results are used to optimize and improve this approach, which provides a new direction for the reinforcement of high fill slopes, and the results can provide a better reference for the reinforcement and design of fill slopes.
Discretization limits of lattice‐Boltzmann methods for studying immiscible two‐phase flow in porous media
Authors: Li Zhe , McClure James E. , Middleton Jill , Varslot Trond , Sheppard Adrian P. 
Published: February 2020

SummaryDigital images of porous media often include features approaching the image resolution length scale. The behavior of numerical methods at low resolution is therefore important even for well‐resolved systems. We study the behavior of the Shan‐Chen (SC) and Rothman‐Keller (RK) multicomponent lattice‐Boltzmann models in situations where the fluid‐fluid interfacial radius of curvature and/or the feature size of the medium approaches the discrete unit size of the computational grid. Various simple, small‐scale test geometries are considered, and a drainage test is also performed in a Bentheimer sandstone sample. We find that both RK and SC models show very high ultimate limits: in ideal conditions the models can simulate static fluid configuration with acceptable accuracy in tubes as small as three lattice units across for RK model (six lattice units for SC model) and with an interfacial radius of curvature of two lattice units for RK and SC models. However, the stability of the models is affected when operating in these extreme discrete limits: in certain circumstances the models exhibit behaviors ranging from loss of accuracy to numerical instability. We discuss the circumstances where these behaviors occur and the ramifications for larger‐scale fluid displacement simulations in porous media, along with strategies to mitigate the most severe effects. Overall we find that the RK model, with modern enhancements, exhibits fewer instabilities and is more suitable for systems of low fluid‐fluid miscibility. The shortcomings of the SC model seem to arise predominantly from the high, strongly pressure‐dependent miscibility of the two fluid components.
Formaldehyde Electro‐catalytic Oxidation onto Carbon Paste Electrode Modified by MIL‐101(Cr) Nanoparticles
Authors: Gheytani S. , Hassaninejad‐Darzi S. K. , Taherimehr M. 
Published: February 2020

AbstractIn this paper, MIL‐101(Cr) metal‐organic framework (MOF) has been rapidly synthesized via microwave heating and fully characterized using powder X‐ray diffraction (PXRD), field emission scanning electronic microscopy (FESEM), Fourier transform infrared (FT‐IR) and nitrogen adsorption/desorption isotherm. FESEM image of MIL‐101(Cr) MOF displays spherical particles with a uniform morphology and particle size under 100 nm. The BET surface area and average pore diameter of synthesized MIL‐101(Cr) MOF were obtained to be 7.266 × 102 m2 g−1 and 3.28 nm, respectively. Nickel hydroxide dispersed onto MIL‐101(Cr) nanoparticles modified carbon paste electrode (Ni(OH)2‐MIL/CPE) was employed for electro‐catalytic oxidation of formaldehyde (CH2O) in the alkaline medium. The mean value of electron‐transfer coefficient, charge‐transfer rate constant and surface coverage of the Ni(OH)2‐MIL/CPE are found to be 0.517, 0.0058 s−1 and 7.88 × 10−8 mol cm−2, respectively. Also, the mean value of catalytic rate constant and diffusion coefficient of CH2O in the modified electrode surface are calculated to be 2.37 × 102 cm3 mol−1 s−1 and 1.288 × 10−6 cm2 s−1, respectively. The results indicate that Ni(OH)2‐MIL/CPE displays good electrocatalytic activity to the CH2O oxidation owing to porous structure and the large surface area of MIL‐101(Cr) MOF.
Anatomical region segmentation method from dermoscopic images of pigmented skin lesions
Authors: Chakkaravarthy A. Prabhu , Chandrasekar A. 
Published: February 2020

AbstractMelanoma tumor can cause a serious life threatening problem in humans, if left untreated for a long time without early diagnosis. For early diagnosis of melanoma, it is more significant to develop novel methods based on biophysics analyses, molecular targets recognitions, and new image analysis criteria. In this article, anatomical region segmentation and diameter identification is proposed to detect melanoma from dermoscopic images. Four main steps of the proposed system are as follows: In the first step, the preprocessing is performed to smooth the melanoma extraction process. The region segmentation is done in the second step using watershed segmentation and Sobel operator. In the third step, the postprocessing procedures like as morphological open, canny edge detection also applied to improve the region of interest. Finally, the melanoma region is identified using color symmetry features. The proposed method is tested with two data sets to prove the performance proposed method. The proposed method achieved an accuracy of 95.31% and specificity of 98.3%, which is better than other methods. Experimental results show that the effectiveness of the proposed method and illustrate viability of real‐time clinical applications.
Circular RNA circ‐Ttc3 protects HaCaT cells from hypoxic injury by downregulation of miR‐449a
Authors: Yu Lingling , Wang Qiaoyan , Liu Ning , Zhao Jun , Yu Jingjing , Tao Shujun 
Published: February 2020

AbstractBackgroundPressure ulcer (PU) is a common complication of acute and long‐time hospitalization, especially in elderly patients. The incidence and prevalence of PU are swiftly fortifying. Currently, our purpose was to investigate the functional impacts of circ‐Ttc3 on PU.MethodsHaCaT cells were pretreated under hypoxia condition. Cell counting kit 8 assay and flow cytometry were utilized to test HaCaT cell viability and apoptosis. Quantitative reverse transcription polymerase chain reaction was utilized to determine circ‐Ttc3 and miR‐449a expression. Western blot was performed to examine apoptosis‐associated proteins expression. Subsequently, the above‐described investigations were reperformed after miR‐449a upregulation.ResultsHypoxia induced apoptosis and declined viability in HaCaT cells. Circ‐Ttc3 expression was enhanced after transfection with circ‐Ttc3 expressing vector. Overexpressing circ‐Ttc3 raised viability and reduced apoptosis in HaCaT cells. Moreover, miR‐449a expression was elevated by hypoxia and reversed by overexpressing circ‐Ttc3. And circ‐Ttc3 exerted its effect via downregulating miR‐449a. Finally, overexpressing circ‐Ttc3 activated nuclear factor kappa‐B (NF‐κB) and phosphatidylinositol 3 kinase (PI3K)/protein kinase B (AKT) pathways via downregulating miR‐449a.ConclusionOur data suggested that circ‐Ttc3 alleviated hypoxic injury and activated NF‐κB and PI3K/AKT pathways by downregulating miR‐449a in HaCaT cells.
Novel Schiff bases–based thiophenes: Design, synthesis and biological evaluation
Authors: Puthran Divyaraj , Poojary Boja , Nayak Soukhyarani G. , Purushotham Nikil , Bhat Manjunath , Hedge Hemant 
Published: February 2020

Abstract2‐amino‐5‐(3‐fluoro‐4‐methoxyphenyl)thiophene‐3‐carbonitrile derivatives have been synthesized from 1‐(3‐fluoro‐4‐methoxyphenyl)ethanone, malononitrile, mild base, and sulfur powder using the Gewald method through a multistep reaction sequence. The structures of newly synthesized compounds were established on the basis of their elemental analyses, IR, 1H NMR, 13C NMR, and mass spectral data, and then synthesized compounds were screened for their in vitro antimicrobial activity. Among them, derivatives 3b (thiphene), 3f (pyrazole), and 3d (halogen) showed good activity and remaining derivatives exhibited moderate activity.
Discharge or reuse? Comparative sustainability assessment of anaerobic and aerobic membrane bioreactors
Authors: Xu Xiaofan , Dao Hang , Bair Robert , Uman Ahmet E. , Yeh Daniel , Zhang Qiong 
Published: February 2020

AbstractWater reuse is believed to be a sustainable solution to overcome the scarcity of freshwater. Aerobic and anaerobic membrane bioreactors are becoming an effective technology for wastewater treatment and reuse. Aerobic membrane bioreactors show good nutrient removal, whereas those that are anaerobic have nutrient‐rich effluent, enabling the direct agricultural use of the effluent. As a result, the end use will dictate the potential environmental impacts of the bioreactor's application. Therefore, with the consideration of the end use (i.e., discharge or reuse) of the effluent, this study aimed to compare the environmental and economic impacts associated with full‐scale aerobic and anaerobic membrane bioreactors for municipal wastewater treatment under different end use scenarios using life cycle assessment and cost analysis. The results of these analyses show that anaerobic bioreactors have greater environmental impacts and life cycle cost than aerobic bioreactors in the discharge scenario due to the incorporation of a biological nutrient removal system. In the reuse scenario, anaerobic membrane bioreactors have lower impacts that are attributable to the offset of the nutrients required for crops, and the potential benefits vary depending on the types of crops receiving the reclaimed water. Integrating anaerobic membrane bioreactors with agricultural fertigation resulted in effluent water nitrate concentrations (after crop uptake and soil treatment) of <2 mg L−1 in most U.S. states. This indicated that the use of the anaerobic membrane bioreactors effluent for fertigation could be a win‐win solution to both irrigation water shortage and high environmental impact associated with nutrient removal.