bluuebunny/crossref_metadata_2025 huggingface dataset:
Dicarboxylic acid-epoxy vitrimers: influence of the off-stoichiometric acid content on cure reactions and thermo-mechanical properties
Authors: Poutrel Quentin-Arthur , Blaker Jonny J. , Soutis Constantinos , Tournilhac François , Gresil Matthieu
Published: June 2020

Vitrimers with 1 : 1 to 2 : 1 epoxy/acid ratio and TBD show increased stiffness and gradual transition from an exchangeable to non-exchangeable network.
Heavy metal pollution and human health risk assessment at mercury smelting sites in Wanshan district of Guizhou Province, China
Authors: Wu Zhiyuan , Zhang Lina , Xia Tianxiang , Jia Xiaoyang , Wang Shijie
Published: June 2020

The DRA model was used to analyze the human health risk contribute of different HMs sources in the mercury smelting site, and the PRA model was used to verify.
Terpyridine-based Pd(ii)/Ni(ii) organometallic framework nano-sheets supported on graphene oxide—investigating the fabrication, tuning of catalytic properties and synergetic effects
Authors: Ren Ruirui , Bi Sa , Wang Linhong , Zhao Wuduo , Wei Donghui , Li Tiesheng , Xu Wenjian , Liu Minghua , Wu Yangjie
Published: June 2020

The synergistic effect between Ni and Pd atom was the crucial factor for enhancing catalytic activity.
Theoretical insights into a colorimetric azo-based probe to detect copper ions
Authors: Pang Juan , Shu Li , Li Ming , Hu Xiaohong
Published: June 2020

DFT calculations indicated that the rotation of the N,N-di(carboxymethyl)amino group around the N–CAr bond by approximately 90°, resulted in a larger HOMO–LUMO energy gap, and led to the observed colour change.
Deep insight into reasons for the mechanoluminescence phenomenon of triphenylamine-substituted imidazoles and their distinct mechano-fluorochromic behaviours
Authors: Liu Xiao-Jing , Gao Guan-Lei , Jiang Hao , Jia Yan-Rong , Xia Min
Published: June 2020

Three imidazole crystals with high molecular dipole moments exhibit remarkable ML effects that are attributed to the formation of polar molecular couples in crystals. Imidazole and benzimidazole crystals are MFC-active, but phenanthrimidazole one is MFC-inactive.
Morphology and carrier non-geminate recombination dynamics regulated by solvent additive in polymer/fullerene solar cells
Authors: Huo Ming-Ming , Hu Rong , Zhang Qing-Shan , Chen Shaoting , Gao Xing , Zhang Yi , Yan Wei , Wang Yong
Published: June 2020

The device (PBDTTT-E:PC71BM) with DIO treated show lower non-geminate combination rate (krec) and non-geminate combination current (JNGR). This indicates that DIO treatment can restrain the non-geminate recombination, realizing the higher Jsc and FF.
Real roles of perylene diimides for improving photocatalytic activity
Authors: Zhang Fengxia , Li Wenjing , Jiang Tianyi , Li Xuemei , Shao Yuanyuan , Ma Yongshan , Wu Junsen
Published: June 2020

Three novel visible-light-driven composite photocatalysts were synthesized by hydrothermal method. The effects of introducing PDIs with different structures into TiO2 were evaluated by assaying the photodegradation rate of methylene blue.
The contributions and mechanisms of iron-microbes-biochar in constructed wetlands for nitrate removal from low carbon/nitrogen ratio wastewater
Authors: Xu Jian , Liu Xiawei , Huang Jiaolong , Huang Manqi , Wang Tao , Bao Shaopan , Tang Wei , Fang Tao
Published: June 2020

Schematic diagram of RDCWs system and proposed mechanisms for nitrate removal.
Effect of steam de-alumination on the interactions of propene with H-ZSM-5 zeolites
Authors: Hawkins Alexander P. , Zachariou Andrea , Parker Stewart F. , Collier Paul , Barrow Nathan , Silverwood Ian P. , Howe Russell F. , Lennon David
Published: June 2020

Inelastic and quasi-elastic neutron scattering are used to investigate how steaming changes the physico-chemical characteristics of the zeolite ZSM-5.
Impact of photosensitizer orientation on the distance dependent photocatalytic activity in zinc phthalocyanine–nanoporous gold hybrid systems
Authors: Steinebrunner David , Schnurpfeil Günter , Kohröde Mathis , Epp Alexander , Klangnog Khaetthariya , Tapia Burgos Jorge Adrian , Wichmann Andre , Wöhrle Dieter , Wittstock Arne
Published: June 2020

The distance dependency of the photocatalytic activity in zinc phthalocyanine–nanoporous gold hybrid systems was investigated revealing the importance of photosensitizer orientation in novel hybrid-based photocatalysts.
Parent and nano-encapsulated ytterbium(iii) complex toward binding with biological macromolecules, in vitro cytotoxicity, cleavage and antimicrobial activity studies
Authors: Aramesh-Boroujeni Zahra , Jahani Shohreh , Khorasani-Motlagh Mozhgan , Kerman Kagan , Noroozifar Meissam
Published: June 2020

The biological applications of Yb-complexes including anticancer, antimicrobial and DNA cleavage ability, and their interaction with FS-DNA and BSA were examined.
A new oxygen-rich energetic salt dihydrazine tetranitroethide: a promising explosive alternative with high density and good performance
Authors: Mei Haozheng , Yang Junqing , Cao Wenli , Hu Yong , He Piao , Zhang Jian-Guo
Published: June 2020

A novel high-energy salt with good oxygen balance, dihydrazine tetranitroethide (5), has been synthesized and characterized by FT-IR spectroscopy, NMR spectroscopy, elemental analysis, and X-ray single crystal diffraction.
Molecular dynamics study of convective heat transfer mechanism in a nano heat exchanger
Authors: Sun Haiyi , Li Fei , Wang Man , Xin Gongming , Wang Xinyu
Published: June 2020

The convective heat transfer mechanism in a nano heat exchanger is investigated using molecular dynamics simulation.
Sensitivity enhancement via multiple contacts in the {1H–29Si}–1H cross polarization experiment: a case study of modified silica nanoparticle surfaces
Authors: Yan Chuanyu , Kayser François , Dieden Reiner
Published: June 2020

In this paper we demonstrate {1H–29Si}–1H multiple cross polarization inverse detection (MCPi) solid state NMR as a robust technique for studying modified silica nanoparticle surfaces.
Investigation and improvement of catalytic activity of G-quadruplex/hemin DNAzymes using designed terminal G-tetrads with deoxyadenosine caps
Authors: Cao Yanwei , Ding Pi , Yang Luyan , Li Wenjing , Luo Yu , Wang Jine , Pei Renjun
Published: June 2020

Investigation of the peroxidase activities of G4/hemin DNAzymes using designed terminal G-tetrads by eliminating the steric effect of loop regions.
Methanol loading dependent methoxylation in zeolite H-ZSM-5
Authors: Matam Santhosh K. , Nastase Stefan A. F. , Logsdail Andrew J. , Richard. A Catlow C.
Published: June 2020

Room temperature methoxylation is methanol loading dependent: the higher the methanol loading, the faster the methoxylation. Methanol load of ≥2 leads to methoxylation while no methoxylation is observed with ≤1 molecule per Brønsted acidic site.
Mutation effects on charge transport through the p58c iron–sulfur protein
Authors: Teo Ruijie D. , Migliore Agostino , Beratan David N.
Published: June 2020

Functional electron transfer between the [Fe4S4] cluster and the nucleic acid is impacted by a Y345C mutation in the p58c subunit of human primase.
Electronegativity and location of anionic ligands drive yttrium NMR for molecular, surface and solid-state structures
Authors: Lätsch Lukas , Lam Erwin , Copéret Christophe
Published: June 2020

The yttrium chemical shift signature of molecular and solid-state structures is determined by two key factors: electronegativity (isotropic chemical shift) and pyramidalization (anisotropy) of the anionic ligands.
High-performance, air-stable, n-type thermoelectric films from a water-dispersed nickel-ethenetetrathiolate complex and ethylene glycol
Authors: Ueda Kazuki , Yamada Yuto , Terao Toshiki , Manabe Kei , Hirai Tomoyasu , Asaumi Yuta , Fujii Syuji , Kawano Shintaro , Muraoka Masahiro , Murata Michihisa
Published: June 2020

High-performance n-type thermoelectric films were fabricatedviaan environmentally benign process using a water-dispersed nickel-ethenetetrathiolate (Ni-ETT) and ethylene glycol.
Key Word Signing Has Higher Iconicity Than Sign Language
Authors: Rombouts Ellen , Maessen Babette , Maes Bea , Zink Inge
Published: June 2020

Purpose

Key word signing (KWS) entails using manual signs to support the natural speech of individuals with normal hearing and who have communication difficulties. While manual signs from the local sign language may be used for this purpose, some KWS systems have opted for a distinct KWS lexicon. Distinct KWS lexicon typically aims for higher sign iconicity or recognizability to make the lexicon more accessible for individuals with intellectual disabilities. We sought to determine if, in the Belgian Dutch context, signs from such a distinct KWS lexicon (Spreken Met Ondersteuning van Gebaren [Speaking With Support of Signs; SMOG]) were indeed more iconic than their Flemish Sign Language (FSL) counterparts.

Method

Participants were 224 adults with typical development who had no signing experience. They rated the resemblance between a FSL sign and its meaning. Raw data on the iconicity of SMOG from a previous study were used. Translucency was statistically and qualitatively compared between the SMOG lexicon and their FSL counterparts.

Results

SMOG had an overall higher translucency than FSL and contained a higher number of iconic signs.

Conclusion

This finding may support the value of a separate sign lexicon over using sign language signs. Nevertheless, other aspects, such as wide availability and inclusion, need to be considered.
Protection of low‐voltage DC microgrid based on series R–L–C equivalent circuit utilising local measurements
Authors: Gaurav Satish , Nougain Vibhuti , Panigrahi Bijaya Ketan
Published: June 2020

The adoption of low‐voltage DC microgrid at a large scale is hindered by the lack of an effective protection scheme. This work proposes a dedicated protection scheme based on multi‐threshold current values, which enhances the security of the system by avoiding the risk of false tripping. This is achieved in a few milliseconds without losing the deadline of critical fault clearing time post, which the voltage sources converter interfaced power sources may get disrupted leading to de‐energisation of the system. The algorithm relies upon the transient response of the series resistor–inductor–capacitor (R–L–C) equivalent circuit having initially charged filter capacitors. The threshold values of the fault current for each protection device at every network node are set locally by considering the weakest fault criterion. The extensive simulation study has been performed on MATLAB/Simulink for validating the reliability of the proposed algorithm under heavy load transient, at different fault locations, and with high fault resistance.
Diagnostik und Therapie der schweren akuten Pankreatitis in der Intensivmedizin
Authors: Wirtz Theresa H. , Puengel Tobias , Buendgens Lukas , Luedde Tom , Trautwein Christian , Koch Alexander
Published: June 2020

Acute pancreatitis is a potentially life-threatening disease that requires intensive care, especially in severe cases. The present article is intended to illustrate the possibilities of a rational diagnosis of acute pancreatitis as well as to provide an overview of the stage-adapted therapy, which includes both conservative measures and interventional interdisciplinary treatment strategies.
Radiopharmaka in Diagnostik und Therapie
Authors: Stegmayr Armin
Published: June 2020

Die Nuklearmedizin stellt eine wichtige Säule in der medizinischen Diagnostik und Therapie dar, dessen Grundprinzip auf dem Nachweis von Radiopharmaka, welche in den Stoffwechsel eingeschleust werden, fußt. Der folgende Artikel gibt einen Überblick über dieses komplexe Thema.
Editorial
Authors: Proff Peter
Published: June 2020

Liebe Kolleginnen und Kollegen,

die Verfügbarkeit neuer Technologien sowie die Digitalisierung gewinnen
für die Kieferorthopädie des 21. Jahrhunderts zunehmend an Bedeutung
und erweitern das konventionelle Spektrum der diagnostisch-therapeutischen
Möglichkeiten, insbesondere auch im Rahmen der Therapie komplexer
Fälle und bei erwachsenen Patienten. Nach wie vor liegen die Kernkompetenzen
des Faches in der korrektiven Behandlung von Zahn- und Kieferfehlstellungen mit
Krankheitswert.
Kephalometrische Analyse der Gesichtsschädelentwicklung im
bayerischen Raum in den letzten 1500 Jahren
Authors: Rudzki Ingrid , Proske Martin , Sagner Thomas , Kirschneck Christian
Published: June 2020

Untersuchungen, wie sich das Viszerokranium des Menschen
entwicklungsgeschichtlich verändert hat, sind bislang nur
unzureichend verfügbar. Das Ziel der vorliegenden Studie war es
daher, mittels radiologischer FRS-Bildgebung die Konfiguration des
Viszerokraniums frühmittelalterlicher Schädel
(500–800 n. Chr., N=66) aus der Staatssammlung für
Anthropologie und Paläoanatomie in München mit
Angle-Klasse-I-Okklusion mit jener der gegenwärtigen
Bevölkerung im gleichen Lebensraum (N=65, Angle-Klasse I) zu
vergleichen, um mögliche Veränderungen im Viszerokranium in
den vergangenen ca. 1500 Jahren zu erfassen. Es zeigte sich, dass der
orthognathe Gesichtstyp vor dem retrognathen und prognathen dominierte.
Zudem verkleinerte sich in den zwischen den beiden Gruppen liegenden 1500
Jahren der maxilläre Prognathiegrad signifikant, während der
mandibuläre Prognathiegrad zunahm mit Verkleinerung der sagittalen
interbasalen Relation. Die primär posteriore maxilläre
Neigung bei den mittelalterlichen Schädeln zeigte sich bei Rezenten
in Bezug zum maxillären Prognathiegrad anterior geneigt. Die
mandibuläre anteriore Inklination änderte sich nicht im
Charakter, war jedoch bei rezenten Individuen geringer ausgeprägt.
Die Prominenz des Pogonions nahm ab, während sich die
Größe des Kieferwinkels nahezu nicht veränderte. Die
Achsen der Inzisivi passten sich den skelettalen Veränderungen im
Sinne einer moderaten dentalen Kompensation an. Der Interinzisalwinkel blieb
dabei in seiner Größe konstant.
Akademisierung des Hebammenberufs (Teil 1): Chancen – und wie
sie in den Studiengängen bestmöglich genutzt werden
können
Authors: Bovermann Yvonne
Published: June 2020

Die Reform des Hebammen-Berufsgesetzes war lange überfällig.
Die WHO fordert schon seid Jahren eine akademische
Primärqualifikation der Hebammen, die EU hat 2013 ihre entsprechende
Richtlinie geändert, sodass innerhalb der EU alle Länder die
Hebammenausbildung entsprechend ändern mussten, sofern sie das nicht
ohnehin schon getan hatten. Dennoch wurde die Reform in Deutschland
kontrovers diskutiert. Besonders seitens der ärztlichen Vertreter
und Vertreterinnen wurden zahlreiche Bedenken geäußert.
Dabei ist der Reformbedarf in der Hebammenausbildung Deutschlands enorm, die
letzte Änderung fand 1985 statt. Die WHO weist daraufhin, dass
über 50 Outcomes in der Geburtshilfe verbessert werden, wenn die
Qualität der Hebammenausbildung gesteigert wird. In der
Gesetzesreform liegt also ein enormes Potenzial. Besondere gesetzliche
Bestimmungen des neuen Hebammengesetzes sind zudem neuartig und
können vorbildhaft sein für andere Studiengänge der
Gesundheitsberufe, wie z. B. die Finanzierung der praktischen
Studienanteile und des Studierendengehaltes.
Zur Akademisierung des Hebammenberufs
Authors: Singer Dominique
Published: June 2020

Liebe Leserinnen und Leser

den Schwerpunkt dieser Ausgabe der Zeitschrift für Geburtshilfe und
Neonatologie (ZGN) bildet eine Diskussion um die Akademisierung des Hebammenberufs.
Den Anstoß dazu hat Prof. Franz Kainer mit einem Kommentar gegeben, in dem
er sich im vergangenen Jahr – in seiner Funktion als Präsident der
Deutschen Gesellschaft für Perinatale Medizin – zu dem Für
und Wider der Akademisierung geäußert hatte (Z Geburtsh Neonatol
2019; 223: 253–254). Nachdem diese zum damaligen Zeitpunkt bereits
„beschlossene Sache“ war, erschien es den Herausgebern der ZGN
sinnvoll, noch einen Schritt weiter zu gehen und zu fragen, wie die Chancen dieser
Entwicklung in den allerorten einzurichtenden Hebammenstudiengängen genutzt
und wie ihre Risiken vermieden werden könnten. Hierzu wurden 2
Beiträge – gewissermaßen „pro und contra“
– von berufener Seite erbeten, die nunmehr fertiggestellt wurden (Dank an
die AutorInnen!) und hier abgedruckt sind. Die befürwortenden Argumente
werden von Yvonne Bovermann aus dem Präsidium des Deutschen Hebammenverbands
e.V. vorgetragen, die kritischen Punkte von Joachim Graf et al. aus dem Institut
für Gesundheitswissenschaften und Department für Frauengesundheit am
Universitätsklinikum Tübingen erörtert, wobei divergierende
Einschätzungen zutage treten, aber auch eine grundsätzliche
Einigkeit in dem Bemühen um nachhaltigen Fortschritt erkennbar wird.
Therapieerfolg von Protonenpumpeninhibitoren bei der Therapie von Kontaktgranulomen
Authors: Heyduck Adrienne , Pickhard Anja , Olthoff Arno , Hoffmann Thomas , Reiter Rudolf
Published: June 2020

Gemäß der S2k-Leitlinie „Gastroösophageale Refluxkrankheit (engl. GERD)“ von 05/2014 wird bei der extraösophagealen GERD-Manifestation (z. B. mit Ausbildung eines Kontaktgranuloms, KG) eine empirische Protonenpumpeninhibitor (PPI)-Therapie in doppelter Standarddosis (z. B. Pantoprazol 40 mg 2-mal/Tag) über 8 Wochen angeraten. Valide Studiendaten existieren hierzu jedoch nicht.

Im Rahmen einer prospektiven Studie von 05/2015–12/2019 erhielten 39 Patienten mit endoskopisch nachgewiesenem KG konsekutiv randomisiert PPI in einfacher (1-mal PPI, n = 22) bzw. doppelter Standarddosis (2-mal PPI, n = 17) für 8 Wochen. Es wurden bei Erstvorstellung und bei Kontrolle nach 4 Monaten ein möglicher gastrolaryngealer Reflux sowie Halssensationen, Räusperneigung oder Heiserkeit erfasst und eine Videolaryngostroboskopie durchgeführt, um die Befundentwicklung des Granuloms zu beurteilen (Progredienz, gleichbleibend, Remission < 50 %, > 50 % oder komplett). Die beiden Gruppen wurden miteinander verglichen.

Das Granulom war in 40 % der Fälle nach Therapie mit 1-mal PPI und in 77 % der Fälle mit 2-mal PPI verschwunden bzw. regredient (p < 0,05). Bei Kontrolle waren 23 % der Patienten mit 1-mal PPI völlig symptomlos und 77 % der Patienten mit 2-mal PPI. Halssensationen wurden bei Erstvorstellung mit 64 % als häufigstes Symptom angegeben. Bei der Kontrolle nach PPI-Therapie in einfacher bzw. doppelter Standarddosis waren Halssensationen nur noch in 33 % bzw. 15 % der Fälle bei Granulomremission nachweisbar. Bei Persistenz des Granuloms waren sie jedoch kaum beeinflussbar.

Die Therapie eines KG mit PPI in doppelter Standarddosis ist effektiver als in einfacher Standarddosis. Diese Ergebnisse müssen an einem größeren Kollektiv bestätigt werden.
Periorbital Surgical Anatomy
Authors: Neves José Carlos , Arancibia-Tagle Diego , Medel-Jiménez Ramón , Vásquez Luz María
Published: June 2020

This article discusses the periocular anatomy region thoroughly because its knowledge in detail is of paramount importance for any surgeon dedicated to periocular surgery or any practitioner who dedicate their practice to aesthetic medicine. Mastering the anatomical details permits obtaining consistently good results with the minimal amount of complications possible.
Availability of risky geoengineering can make an ambitious climate mitigation agreement more likely
Authors: Fabre Adrien , Wagner Gernot
Published: June 2020

Some countries prefer high to low mitigation (H ≻ L). Some prefer low to high (L ≻ H). That fundamental disagreement is at the heart of the seeming intractability of negotiating a climate mitigation agreement. Modelling global climate negotiations as a weakest-link game brings this to the fore: Unless everyone prefers H to L, L wins. Enter geoengineering (G). Its risky and imperfect nature makes it arguably inferior to any country’s preferred mitigation outcome. However, absent a global high-mitigation agreement, countries facing disastrous climate damages might indeed wish to undertake it, effectively ranking H ≻ G ≻ L. Meanwhile, those least affected by climate damages and, thus, least inclined to agree to an ambitious mitigation agreement, might be unwilling to engage in risky geoengineering, resulting in L ≻ H ≻ G. With these rankings, all players prefer H to G, and the mere availability of a credible geoengineering threat might help induce an ambitious climate mitigation agreement (H). The analysis here introduces the simplest possible model of global climate negotiations and derives the conditions for this outcome. These conditions may indeed be likely, as long as geoengineering is viewed as a credible albeit risky emergency response given the danger of low mitigation levels.
Emotion recognition and confidence ratings predicted by vocal stimulus type and prosodic parameters
Authors: Lausen Adi , Hammerschmidt Kurt
Published: June 2020

Human speech expresses emotional meaning not only through semantics, but also through certain attributes of the voice, such as pitch or loudness. In investigations of vocal emotion recognition, there is considerable variability in the types of stimuli and procedures used to examine their influence on emotion recognition. In addition, accurate metacognition was argued to promote correct and confident interpretations in emotion recognition tasks. Nevertheless, such associations have rarely been studied previously. We addressed this gap by examining the impact of vocal stimulus type and prosodic speech attributes on emotion recognition and a person’s confidence in a given response. We analysed a total of 1038 emotional expressions according to a baseline set of 13 prosodic acoustic parameters. Results showed that these parameters provided sufficient discrimination between expressions of emotional categories to permit accurate statistical classification. Emotion recognition and confidence judgments were found to depend on stimulus material as they could be reliably predicted by different constellations of acoustic features. Finally, results indicated that listeners’ accuracy and confidence judgements were significantly higher for affect bursts than speech-embedded stimuli and that the correct classification of emotional expressions elicited increased confidence judgements. Together, these findings show that vocal stimulus type and prosodic attributes of speech strongly influence emotion recognition and listeners’ confidence in these given responses.
Phase changeable vanadium dioxide (VO2) thin films grown from vanadium pentoxide (V2O5) using femtosecond pulsed laser deposition
Authors: Kumi-Barimah Eric , Anagnostou Dimitris E. , Jose Gin
Published: June 2020

There are significant challenges accompanied by fabricating a pure crystalline VO2 (M1) thin film with an abrupt metal to insulator phase change properties. Most fabrication methods yield an amorphous VO2 thin film that requires a post-annealing process to be converted into crystalline VO2 (M1). Hence, the thickness of VO2 (M1) films produced is very limited. In this work, we report the growth of pure VO2 (M1) crystalline thin films onto a sapphire substrate in an oxygen atmosphere by the femtosecond pulsed laser deposition technique and using vanadium pentoxide (V2O5) as an ablation target. The thin films were deposited at substrate temperatures of 25 °C, 400 °C, and 600 °C, which reveal the crystallized structures of VO2 (M1) without post-annealing. The thin film deposited at a substrate temperature of 600 °C exhibits a sharp and an abrupt metal-to-insulator transition (MIT) at a temperature of 66.0 ± 2.5 °C with nearly four orders of magnitude of the resistivity change (3.5 decades) and a narrow MIT hysteresis width of 3.9 °C. Furthermore, the influence of the substrate temperature, nanoparticle or grain size, and film thickness on the MIT parameters such as sharpness of the transition temperature, hysteresis width, and amplitude are discussed for potential applications of tunable antennas, terahertz planar antennas, and RF-microwave switches.
Nonlinear piezo-inkjet equivalent circuit modeling for predicting ink ejection velocity fluctuation caused by meniscus oscillation
Authors: Yoshida Yasunori , Izumi Konami , Ushijima Hirobumi
Published: June 2020

This study used an equivalent circuit model to collectively analyze the oscillation phenomena inside a piezo-inkjet printhead as an electrical oscillation. We propose a new equivalent circuit model that can accurately predict fluctuations in the ink ejection velocity due to meniscus oscillation. Our experimental results for the dependency of the ink ejection velocity on the pulse width of the input waveform included a nonlinear effect having no fixed period. Our new model uses a nonlinear acoustic resistance characterized by the sum of a square function and sine function. The new equivalent circuit model was incorporated into the LTspice behavioral modeling calculations. A good match was observed between the experimental results for the inkjet ejection velocity and results calculated by the model.
Stable decomposability of matrices over the rational closure of a group algebra of an ordered group
Authors: Dubrovin N. I.
Published: June 2020

Under the assumption that the rational closure of a group algebra of a left-ordered group in the ring of operators of the module of formal Malcev series is a division ring, we find a canonical form of nonsingular matrices of this division ring.

Bibliography: 10 titles.
Validation of quantitative magnetic resonance as a non-invasive measure of body composition in an Australian microbat
Authors: Eastick Danielle L. , Edwards Amy M. , Griffiths Stephen R. , Spencer Sarah J. , Robert Kylie A.
Published: June 2020

Body composition (the total amount of fat mass, lean mass, minerals and water that constitute the body) is an important measure for understanding an animal’s physiology, ecology and behaviour. Traditional measures of body composition require the animal to either be placed under anaesthetic, which is invasive and can be high-risk, or be euthanised, preventing the ability to perform repeated measures on the same individual. We aimed to validate quantitative magnetic resonance (QMR) as a non-invasive measure of body composition by comparing QMR scans with chemical carcass analysis (CCA) in Gould’s wattled bats (Chalinolobus gouldii). In addition, we compared a commonly used microbat body condition index (residuals of mass by forearm length) to CCA. We found that QMR is an accurate method of estimating body condition in Gould’s wattled bats after calibration with regression equations, and the condition index could accurately predict lean and water mass but was a poor predictor of fat mass. Using accurate, non-invasive, repeatable measures of body condition may have important implications for ecological research in the face of changing environments.
Mechanical adaptation of monocytes in model lung capillary networks
Authors: Dupire Jules , Puech Pierre-Henri , Helfer Emmanuèle , Viallat Annie
Published: June 2020

Significance

Proper circulation of white blood cells (WBCs) in the pulmonary blood capillary network is crucial for a healthy immune watch. The remarkable mechanical properties of monocytes, a class of WBCs, allow them to gradually adapt their shape as they pass through the narrowest capillaries, ensuring a transition from a slow motion by hops at the entrance of the capillary network to a smooth and rapid circulation. The key parameters are a low cell cortical tension allowing adaptation of the cell shape, but high enough to prevent cell breakage when passing through the network bifurcations, and a high cell internal viscosity to maintain an elongated shape throughout the network.
Telomere shortening produces an inflammatory environment that increases tumor incidence in zebrafish
Authors: Lex Kirsten , Maia Gil Mariana , Lopes-Bastos Bruno , Figueira Margarida , Marzullo Marta , Giannetti Kety , Carvalho Tânia , Ferreira Miguel Godinho
Published: June 2020

Significance

Cancer incidence increases exponentially in human midlife. Even though mutation accumulation in somatic tissues results in increased tumorigenesis, it is currently not understood how aging contributes to cancer. Telomeres, the ends of eukaryotic linear chromosomes, shorten with each cell division. Here, we show that telomere shortening contributes to cancer in a noncell autonomous manner. Using embryo chimeras of telomerase-deficient zebrafish generated from melanoma-prone fish, we show that tumors arise more frequently, multiply faster, and become more invasive in animals with shorter telomeres. Telomere shortening gives rise to increased senescence and systemic inflammation. We observed increased melanoma dissemination in zebrafish larvae with very short telomeres. Thus, telomere shortening similar to human aging, generates a chronic inflammatory environment that increases cancer incidence.
Multiple states and transport properties of double-diffusive convection turbulence
Authors: Yang Yantao , Chen Wenyuan , Verzicco Roberto , Lohse Detlef
Published: June 2020

When fluid stratification is induced by the vertical gradients of two scalars with different diffusivities, double-diffusive convection (DDC) may occur and play a crucial role in mixing. Such a process exists in many natural and engineering environments. Especially in the ocean, DDC is omnipresent since the seawater density is affected by temperature and salinity. The most intriguing phenomenon caused by DDC is the thermohaline staircase, i.e., a stack of alternating well-mixed convection layers and sharp interfaces with very large gradients in both temperature and salinity. Here we investigate DDC and thermohaline staircases in the salt finger regime, which happens when warm saltier water lies above cold fresher water and is commonly observed in the (sub)tropic regions. By conducting direct numerical simulations over a large range of parameters, we reveal that multiple equilibrium states exist in fingering DDC and staircases even for the same control parameters. Different states can be established from different initial scalar distributions or different evolution histories of the flow parameters. Hysteresis appears during the transition from a staircase to a single salt finger interface. For the same local density ratio, salt finger interfaces in the single-layer state generate very different fluxes compared to those within staircases. However, the salinity flux for all salt finger interfaces follows the same dependence on the salinity Rayleigh number of the layer and can be described by an effective power law scaling. Our findings have direct applications to oceanic thermohaline staircases.
A chemically stabilized sulfur cathode for lean electrolyte lithium sulfur batteries
Authors: Luo Chao , Hu Enyuan , Gaskell Karen J. , Fan Xiulin , Gao Tao , Cui Chunyu , Ghose Sanjit , Yang Xiao-Qing , Wang Chunsheng
Published: June 2020

Significance

Sulfur is a promising cathode material for rechargeable lithium batteries due to its high capacity, low cost, abundance, and high sustainability. However, lithium sulfur batteries suffer from poor cycle life and low energy density under lean electrolyte conditions because of the dissolution of lithium polysulfide intermediates. Here, we report that the chemical bonding between sulfur and carbon/oxygen in an oxygen-rich dense carbon host can stabilize sulfur and improve the stability of lean electrolyte lithium sulfur batteries. This work opens up a way to develop chemical bonding-stabilized sulfur materials for stable and high-energy lithium sulfur batteries.
Irony, humor or both?
Authors: Hirsch Galia
Published: June 2020

This contribution revisits the difference between irony and humor taking into
account new approaches shedding light on the complicated relationship between irony
and humor (Dynel 2013; Gibbs, Bryant & Colston 2014; Garmendia 2014; Kapogianni 2011; Piskorska 2014; Yus 2016). In
previous research (Hirsch 2011a, 2011b), the differentiation between irony
and humor was established based on a comparative model, which distinguished between
cues for irony and cues for humor through pragmatic analysis of source texts and
their translations.

In view of some of the new accounts (Dynel
2013; Kapogianni 2011; Piskorska 2014), the study purports to adapt
the model, incorporating the concept of surrealistic irony and concluding that
differences in the use of explicitation strategies in translation are still a
decisive tool in setting the boundaries between irony and humor.
Ultra-flexible, stretchable, highly conductive and multi-functional textiles enabled by brush-painted PEDOT:PSS
Authors: Jin In Su , Lee Woosung , Lim Seung Ju , Ko Jae Hoon , Jung Jae Woong
Published: June 2020

Electronic textile (E-textile) with excellent electrical/mechanical properties in large area is an essential component for wearable electronics. We herein demonstrated that brush-painting is a promising printing technique of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) on fabric substrates to prepare ultra-flexible, stretchable, and highly conductive E-textiles. The brush-painting allows uniform film surface with much lower sheet resistance which is opposite to agglomerated particulates of the film from the drop-casting. As a result, the PEDOT:PSS-based E-textiles achieve high conductivity of 6.4 S cm−1 after successive bush-painting up to 50 times with excellent mechanical properties including bending, stretching, and washing stability. The brush-painted E-textiles exhibit excellent Joule heating properties with low operative voltage and quick response time. In addition, the large-area piezoresistive sensors have been realized by the brush-painted E-textiles, suggesting its great potential of the brush-painting PEDOT:PSS toward multi-functional smart textiles or wearable electronics.
Mathematical Analysis of Wind Turbine Blade at various Angle of attack and Reynold Number
Authors: Zunaid M. , Mustafa Md. Gulam
Published: June 2020

This work utilizes only the closure system k-ω SST RANS to model wake growth and resolution for both a single fully resolved rotating turbine and two fully resolved rotating turbines in-line. These simulations have been effective in predicting wake growth and resolutions, as well as predicting downstream turbine speed deficits. The precise wake structure and helical tendencies also showed. The findings of vorticity also showed a precise structure of the wake and helical tendencies. Results clearly shows the variation of Cl and Cd with angle of attack. Thus, for a particular Reynold number the optimum angle of attack came between 350 and 400. With the increase in the Reynold number Cl also increases, and wind turbine efficiency increases by 20%.
Experimental investigations for erosive wear of Mild Steel Pipe bends at different positions in Pneumatic Conveying System (PCS)
Authors: Yadav Bharat Singh , Singh R C , Chaudhary Rajiv
Published: June 2020

Pharmaceutical and chemical industries have been using transportation of various material/powder through pipes. The bend was punctured in the conveying system during the flow of material and finally stops the production. The scientists and researchers are working on material and mechanism to reduce the material loss of the bends. An experimental investigation have been carried out for erosive wear in pipe bends of a pneumatic conveying pipe line. Six bends has been considered for the investigation of wear at 90° from rotary feeder to air filter. The Comparison of erosive wear was investigated for all six pipe bends. The bend 2 was the most critical place in the pipeline. Other five bends had less erosion than the bend 2 due to maximum velocity of the flow.
Effect of argon flow rate on the weld bead characteristics of TIG coating
Authors: Angra Surjit , Thakur Lalit , Singh Jasbir
Published: June 2020

The research workinvestigatethe weld bead characteristics of WC-CoCr coatingfabricated by using tungsten inert gas welding process. Owing to the heat generated during the TIG coating, the extent of the temperature rise is adequate to cause the significant changes inthe melt dimensions of the coating. Toolmakers microscope has been used to capture the coating cross-section obtained at different values of argon flow rate. ImageJ software has been used to measure the porosity level in the coatings. The results shows that higher flow rate of argon gas increases the porosity and weld contamination in thecoating, because of the turbulencetakes place at higher flow rate.
Optimization of process parameters of A-359 aluminium alloy in EPS-assisted-investment casting process using Taguchi method
Authors: Bhati Girendra , Kumar Sudhir , Kumar Ajay , Kumar Sanjeev
Published: June 2020

The purpose of this research is to optimize the process parameters such as pouring temperature, pouring time and the thickness of coating using Taguchi mod in expandable polystyrene assisted investment casting process. In this paper, zircon flour and mullite sand with potassium silicate binder and coarse fused-silica sand stucco are used as coating materials. Problems like cracking, breaking, bending, expanding and distending in shell are eliminated by preheating the shell and slowly rise in temperature, during foam removal process. For maximum impact strength, the optimum values of process parameters-pouring temperature, pouring time and thickness of coating layers are 750°C, 15 seconds and 5 mm respectively.
Investigation of Laser Sintered AlSi10Mg Specimens for Density and Surface Roughness
Authors: Sharma Ritesh , Kumar Sanjeev , Saha Rajeev
Published: June 2020

AlSi10Mg is one of the most promising alloys in SLM technology due to its low weight and competitive mechanical properties. It gives a good alternative to the conventional manufacturing systems in terms of design flexibility, cost and production time. But the parts made from laser sintering of powder are bound to have rough surface texture. The present study is focused on investigating the impact of process parameters namely laser power, scan speed, hatch spacing and orientation on density and surface roughness of the specimens sintered on selective laser melting of AlSi10Mg. To characterize the parameters, design of experiments was created using RSM and ANOVA analysis was employed to find the factors affecting the responses. The optimization was carried out in MATLAB using optimization toolbox. As per the study, hatch spacing proved to be the major contributor for influencing both density as well as surface roughness.
Prioritization of Variables Affecting the Effectiveness of Material Handling System
Authors: Kumar Surinder , Attri Rajesh
Published: June 2020

In today’s competitive technology environment implementation of advanced manufacturing technologies and its systems like flexible manufacturing system (FMS) has become the necessity of manufacturing organizations. Selection of appropriate material handling equipment based on their variables which affect the effectiveness of material handling system has become the necessity requirement of FMS. Keeping this fact in view, the current paper focuses on identification of different variables like speed of delivery, available space, cost and throughput rate etc. which affects the effectiveness of material handling system and prioritization of these variables using TOPSIS approach. The results of present research will aid to select an effective material handling system for enhancing the required productivity of organisations in an effective manner.
Fabrication and Characterization of hybrid aluminium-fly ash-graphite composite
Authors: Saxena Mayank , Tarique Md. , Rafi Md. , Anand Mukul , Joshi Sumit , Sharma Vipin Kumar , Singh R. C. , Chaudhary Rajiv
Published: June 2020

In the present paper, an aluminium metal composite with fly ash and graphite as the reinforcement were prepared using the stir casting route. The effects of reinforcements on the hardness of the Al 6061 were evaluated using a Brinell hardness tester and optical micrographs and XRD analysis was done to inspect the distribution of the reinforcements in the Al 6061 matrix. It was observed that the introduction of reinforcements in the Al matrix greatly influenced the surface hardness. There was about 32 % improvement in the hardness value. Optical micrographs also indicated the homogeneous distribution of reinforcements in the aluminium matrix.
Relationship of the electric potential inside the nano crystallite with the chemisorbed gas molecules at metal oxide semiconductor surface and its effect on gas sensor response
Authors: Kumar Anil , Kumar Ravi , Singh Rakesh , Prasad B. , Kumar Dinesh , Kumar Mukesh
Published: June 2020

The metal oxide semiconductors surface exhibit great gas sensing response when the size of the grains becomes much smaller i.e. in the range of debye length. In the presented study, the effect of crystal size and surface states has been studied on gas sensing properties for cylindrical shaped nanostructures of metal oxide semiconductors. To calculate the grain potential Poisson’s equation coupled with electroneutrality condition in cylindrical shaped nanostructures has been solved. The shape of the potential profile inside the nanograins has been calculated as a function of available surface states, surface temperature and occupied surface states. Eventually, the sensitivity of the gas sensor has been simulated and compared for different sizes of nanocrystals.
Design and Analysis of Cascaded H Bridge Nine-Level Inverter in Typhoon HIL
Authors: Lone Jaffar Ali , Bakhsh Farhad Ilahi
Published: June 2020

As the pressure on renewable energy resources like wind and solar is growing continuously because of the tremendous rise in electrical energy consumption, inverters are playing an important part. The problem with the conventional two-level inverter is that it has high harmonic pollution and low power rating. These problems limit the use of these inverters in high power applications. Therefore, the trend towards multilevel inverters is gaining more and more interest in researchers these days. In multilevel inverters, by providing a certain switching sequence, various voltage levels can be generated in a staircase manner as close as possible to a sinusoidal waveform. In this paper, Cascaded H Bridge (CHB) based nine-level inverter is designed using Typhoon Hardware-in-loop (HIL) Simulator. The Typhoon HIL Simulator is a real-time simulator that gives real-time results. The designed multilevel inverter has been analyzed for different levels. The obtained results reveal that with the increase in number of levels, the Total Harmonic Distortion (THD) of the inverter reduces.
A Novel System of Primary Oscillations for Micromechanical Gyroscope
Authors: Baranov P , Nesterenko T , Duc B B , Hao L V
Published: June 2020

The paper proposes a novel system of primary oscillations produced by the microelectromechanical (MEMS) gyroscope. This system is based on a synchronous detection of the current passing through the power capacitances of MEMS gyroscope. This detection method enables the excitation and stabilization of primary oscillations during two measuring cycles. The proposed system of primary oscillations also enhances the operation speed and the accuracy of frequency control, and reduces the ambient temperature effect on the stability of the scaling factor of the MEMS gyroscope.
Utilizing Wind Vibrations from Vehicular Airdrag Using Microwind Harnessing Device
Authors: Gapuz Charlyn May A. , Santiago Ronald Vincent M.
Published: June 2020

Windbelt has been developed to be an alternative for wind turbines to utilize wind energy, meanwhile, fast-moving vehicles in highways creates wind forces that has potential to be a source of wind energy. This study presents a windbelt prototype and evaluates the output and performance of 1, 5 and 10 connected windbelts when placed on the highway. The results reveal that for every increase in windspeed there is 0.155v and 0.485v increase in output voltage response for 5 and 10 connected windbelt respectively, indicating that the 10 connected windbelt have the highest output voltage response. This indicates that the higher the number of connected windbelts result to larger output voltage.
Correlation between Rail Vibration and Sound Radiation Using a Hammer Impact
Authors: Hou Bowen , Shao Zhuang , Zeng Qine
Published: June 2020

When the track structure is subject to certain excitation, the vibration characteristics and sound radiation characteristics will show certain correlation with each other. However, the study on finding the direct relationship between rail vibration and radiated sound is very limited. In this paper, the correlation between the rail vibration and radiated sound pressure under a hammer impact was investigated with a full-scale track slab. The rail acceleration, rail surface sound pressure and radiated sound pressure nearby at the rail web and rail foot were measured and analyzed in frequency domain. The transfer function, coherence function were obtained to reveal the relevance between each pair of input and output signals. Finally, by choosing rail vibration acceleration and surface sound pressure as input excitation and choosing the surface sound pressure and the sound pressure in near field as output response successively, the transfer function and the transmission loss for each pair of input and output were analyzed and compared to reveal the signal transmission in different frequency ranges.
Towards the design of a wideband reflective long period grating distributed sensor
Authors: Rana Sohel , Kandadai Nirmala , Subbaraman Harish
Published: June 2020

In this paper, we computationally investigate the effects of metal coating length and coating coverage on the reflected spectrum of a long period grating (LPG) over a broad bandwidth. Simulation results indicate that coating the tail end of the fiber between the LPG and the end facet of the fiber provides a reflected spectrum that mimics the LPG transmission spectrum shape over a 400 nm bandwidth. Based on single LPG simulation results, we present the design of a distributed LPG structure containing a multiple number (n) of LPGs in reflection mode for the first time. Simulation results for n = 1, 2, and 3 are presented here to demonstrate the concept of a distributed reflective LPG design. It is expected that such a sensor will open a new window for distributed sensing using reflective LPGs.
Analytical solution to DGLAP integro-differential equation via complex maps in domains of contour integrals
Authors: Álvarez Gustavo , Kondrashuk Igor
Published: June 2020

A simple model for QCD dynamics in which the DGLAP integro-differential equation may be solved analytically has been considered in our previous papers arXiv:1611.08787[hep-ph] and arXiv:1906.07924[hep-ph]. When such a model contains only one term in the splitting function of the dominant parton distribution, then Bessel function appears to be the solution to this simplified DGLAP equation. To our knowledge, this model with only one term in the splitting function for the first time has been proposed by Blümlein in arXiv:hep-ph/9506403. In arXiv:1906.07924[hep-ph] we have shown that a dual integro-differential equation obtained from the DGLAP equation by a complex map in the plane of the Mellin moment in this model may be considered as the BFKL equation. Then, in arXiv:1906.07924 we have applied a complex diffeomorphism to obtain a standard integral from Gradshteyn and Ryzhik tables starting from the contour integral for parton distribution functions that is usually taken by calculus of residues. This standard integral from these tables appears to be the Laplace transformation of Jacobian for this complex diffeomorphism. Here we write up all the formulae behind this trick in detail and find out certain important points for further development of this strategy. We verify that the inverse Laplace transformation of the Laplace image of the Bessel function may be represented in a form of Barnes contour integral.