bluuebunny/crossref_metadata_2025_split huggingface dataset:
Differential roles of push and pull factors on escape for travel: Personal and social identity perspectives
Authors: Michael Noela , Nyadzayo Munyaradzi W. , Michael Ian , Balasubramanian Sreejith 
Published: February 2020

AbstractThis study examines the effects of push and pull motivations linked to an individual's personal and social identities as key antecedents to escape for travel. In terms of push factors, escape for travel is driven from a personal identity perspective by the need for evaluation of self and regression and from a social identity perspective by the need for social interaction but not enhancement of kinship. Cultural motives that reflect personal identity positively influence escape for travel than destination pull factors linked to social identity. Overall, the study contributes to the existing knowledge on push and pull tourist motivations.
Highly Sensitive Detection of Fe3+ Ions Using Waterborne Polyurethane‐Carbon Dots Self‐Healable Fluorescence Film
Authors: Xiao Luqi , Shi, Jun , Nan Bingfei , Chen Weilong , Zhang Qiang , Zhang Ending , Lu Mangeng 
Published: February 2020

AbstractIn this study, nitrogen‐doped carbon dots (N‐C‐dots) are synthesized via a green and gentle electrochemical‐hydrothermal method. The N‐C‐dots are grafted into the backbone of waterborne polyurethane (WBPU) synthesized from hexamethylene diisocyanate and polycarbonate diol (PCDL). Due to the introduction of N‐C‐dots, the WBPU is functionalized including being able to self heal and specifically identified Fe3+. The self‐healing performance of the WBPU‐N‐C‐dots film is principally attributed to the hydrogen bonding effect of the WBPU and the N‐C‐dots. On the other hand, based on the quenching of fluorescent characteristics of the WBPU‐N‐C‐dots film, it is successfully used in the detection of Fe3+, showing a wide detection range, good selectivity, and high sensitivity. What's more, the tensile strength of the sample is enhanced from 3.50 to 7.12 MPa when the N‐C‐dots content is increased in the WBPU and the thermal stability is improved as a result of the formation of the more thermally‐stable network structures. Interestingly, compared to the traditional solution detection in WBPU‐N‐C‐dots emulsion with the limit of detection of 2.23 × 10−6 m, the detection has the lower limit of detection of 2.19 × 10−6 m in the WBPU‐N‐C‐dots film. These results show that the WBPU‐N‐C‐dots film exhibits great application as an intelligent response‐type material.
Fitness costs associated with carriage of a large staphylococcal plasmid are reduced by subinhibitory concentrations of antiseptics
Authors: LaBreck Patrick T. , Merrell D. Scott 
Published: February 2020

AbstractStaphylococcus aureus carries a collection of mobile genetic elements that often harbor virulence and antimicrobial resistance genes. Since the introduction of antibiotics, plasmids have become a major genetic element responsible for the distribution of antimicrobial resistance. Under antimicrobial selection, resistance plasmids are maintained within bacterial populations as a means to ensure survival. However, in the absence of selection, large plasmids can be lost due to the fitness costs associated with harboring these genetic elements. pC02 is a previously identified multidrug resistance, conjugative plasmid that is found in S. aureus. In addition to antibiotic resistance, pC02 also carries genes known to be associated with antiseptic resistance. Among these, we previously characterized the contribution of qacA to pC02 mediated reduced chlorhexidine susceptibility. Herein, we demonstrate that pC02 also mediates triclosan resistance, likely due to the presence of fabI, a known triclosan resistance gene. Moreover, we demonstrate that conjugative transfer of pC02 increases triclosan resistance in recipient cells. Competition assays demonstrated a fitness cost associated with carriage of the large pC02 plasmid. However, subinhibitory concentrations of either chlorhexidine or triclosan abrogated this fitness cost. Given the widespread use of these antiseptics, both of which accumulate in wastewater and other environmental reservoirs, indiscriminate use of antiseptics likely imposes a constant selective pressure that promotes maintenance of antimicrobial resistance factors within S. aureus.
Pseudoagoraphobia, a Diagnostic Clue in Stiff‐Limb Syndrome
Authors: Marano Massimo , Motolese Francesco , Lanzone Jacopo , Di Santo Alessandro , Rossi Mariagrazia , Bevacqua Maria Gabriela , Ranieri Federico , Capone Fioravante , Gatto Emilia Mabel , Di Lazzaro Vincenzo 
Published: February 2020

ABSTRACTBackgroundStiff‐limb syndrome is part of stiff person spectrum, presenting with fluctuating gait disorders attributed to leg stiffness, spasms, and posturing. It could also manifest with anxiety and specific phobias such as pseudoagoraphobia. We aimed to describe the importance of specific gait phobia as a diagnostic clue to anti–glutamic acid decarboxylase stiff‐limb syndrome.CasesWe reported on 2 cases of stiff‐limb syndrome sharing a similar diagnostic path and phenomenology. Both were featured by pseudoagoraphobia, which has documented to typically cover organic conditions, and a remarkable diagnostic delay attributed to misdiagnoses. Presence of pseudoagoraphobia should not point to the diagnosis of a functional disorder—although a negative instrumental workup is documented.ConclusionsBoth cases are emblematic of the high misdiagnosis rate affecting stiff person syndrome patients. A proper diagnostic process, including the identification of a pseudoagoraphobia, should help in reaching a diagnosis and providing an early and effective treatment.
Auditory Dysfunction in Parkinson's Disease
Authors: Jafari Zahra , Kolb Bryan E. , Mohajerani Majid H. 
Published: February 2020

AbstractPD is a progressive and complex neurological disorder with heterogeneous symptomatology. PD is characterized by classical motor features of parkinsonism and nonmotor symptoms and involves extensive regions of the nervous system, various neurotransmitters, and protein aggregates. Extensive evidence supports auditory dysfunction as an additional nonmotor feature of PD. Studies indicate a broad range of auditory impairments in PD, from the peripheral hearing system to the auditory brainstem and cortical areas. For instance, research demonstrates a higher occurrence of hearing loss in early‐onset PD and evidence of abnormal auditory evoked potentials, event‐related potentials, and habituation to novel stimuli. Electrophysiological data, such as auditory P3a, also is suggested as a sensitive measure of illness duration and severity. Improvement in auditory responses following dopaminergic therapies also indicates the presence of similar neurotransmitters (i.e., glutamate and dopamine) in the auditory system and basal ganglia. Nonetheless, hearing impairments in PD have received little attention in clinical practice so far. This review summarizes evidence of peripheral and central auditory impairments in PD and provides conclusions and directions for future empirical and clinical research. © 2020 International Parkinson and Movement Disorder Society
Segment‐aware dynamic routing for DASH flows over software‐defined networks
Authors: Cetinkaya Cihat , Herguner Korhan , Hellge Cornelius , Sayit Muge 
Published: February 2020

SummaryMost of the video streaming applications running over the Internet send video data over HTTP and provide an architecture for video clients to adapt video quality during streaming. In HTTP adaptive streaming, a raw video is encoded at various qualities, each encoded video file is divided into small segments, and the clients may change the segment quality by sending requests for segments having different qualities over time. MPEG has standardized dynamic adaptive streaming over HTTP (MPEG‐DASH) due to this tendency. In this work, we focus on DASH over software‐defined networks (SDN), and we dynamically reroute DASH flows by considering the current network capacity, available bandwidth of the paths, and bitrate of the segments in order to provide high quality of experience (QoE) and fairness among DASH clients. Simulations performed under various network conditions show that the proposed study provides higher QoE and fairness compared with the max‐flow routing approach.
Alignment of a digital watershed and land use game to national education standards
Authors: Anderson Katelyn , Grudens‐Schuck Nancy , Valek Robert , Schulte Lisa A. , Smalley Scott W. 
Published: February 2020

AbstractDigital games, especially simulations, have supported student learning outcomes in the areas of science and agriculture in classrooms and nonformal settings. Simulations contribute robustly to student achievement in science, technology, engineering, and mathematics (STEM), and agriculture content areas, especially when they are aligned with national education standards. The People in Ecosystems Watershed Integration (PEWI) simulation is a digital game that was evaluated for fit to two national standards: the Next Generation Science Standards (NGSS) and the Agriculture, Food, and Natural Resources Standards (AFNR). The evaluation of alignment of PEWI to NGSS provided “extensive” evidence on a four‐point scale for meeting Criterion A: Explaining phenomenon/designing solutions; Criterion B: 3‐D learning, science and engineering practices, rated for three areas: (a) “extensive” for science and engineering practices, (b) “adequate” for disciplinary core ideas, and (c) “extensive” for cross‐cutting concepts. Additionally, PEWI aligned with nine high school–level NGSS student performance expectations categories. For AFNR Standards, the PEWI evaluation provided evidence for alignment to 10 standards and 17 indicators from the AFNR areas of Environmental Service Systems, Natural Resource Systems, and Plant Systems.
Atmospheric pressure Townsend discharges as a promising tool for the one‐step deposition of antifogging coatings from N2O/TMCTS mixtures
Authors: Rodríguez Durán Iván , Durocher‐Jean Antoine , Profili Jacopo , Stafford Luc , Laroche Gaétan 
Published: February 2020

AbstractThe need to ensuring the “see‐through” property of transparent materials when exposed to sudden temperature changes or very humid conditions has encouraged the development of antifogging strategies, such as the deposition of (super)hydrophilic coatings. However, despite the effectiveness of these coatings in combating the effects of fogging, most of the coating techniques explored to date are typically time‐consuming and environment‐unfriendly. Bearing this in mind, we demonstrate that the application of dielectric barrier discharges operated at atmospheric pressure proves to be successful in preparing antifogging coatings on glass samples from 1,3,5,7‐tetramethylcyclotetrasiloxane (TMCTS) and nitrous oxide (N2O). The antifogging performance of the coatings was found to be governed by the [N2O]/[TMCTS] ratio and not by the [N2O] + [TMCTS] sum. Coatings prepared under a [N2O]/[TMCTS] = 30 were superhydrophilic (water contact angles ≈ 5°–10°) due to surface silanol groups and endowed glass samples with a superior antifogging property, as revealed by the ASTM F 659‐06 test. In contrast, because of the lesser hydrophilicity (water contact angles ≈ 60°), coatings prepared under a [N2O]/[TMCTS] = 10 did not endow glass samples with antifogging property. Regardless of the deposition conditions, the plasma‐deposited coatings displayed crack‐free smooth surfaces (Rrms = 2−4 nm).
Near‐Infrared‐Absorbing Diketopyrrolopyrrole‐Based Semiconducting Polymer Nanoparticles for Photothermal Therapy
Authors: Wei Zuwu , Zhu Bili , Cai Yang , Yan Dan , Lou Yuheng , Guo Zhiyong , Deng Ping 
Published: February 2020

AbstractPhotothermal therapy, an excellent therapeutic approach, has received much attention in recent years. Herein, a novel diketopyrrolopyrrole polymer (DPP‐BDP) is prepared, which shows intense near‐infrared (NIR) optical absorption and admirable photothermal conversion efficacy. Impressively, after assembly into nanoparticles (DB‐FA), the as‐prepared conjugated polymer demonstrates a uniformly distributed size around 200 nm with remarkable NIR absorption at 808 nm. Additionally, it displays high biocompatibility and photostability. More interestingly, the obtained DB‐FA NPs are uptaken by cancer cells and present excellent anticancer in vitro and in vivo under 0.8 W cm−2 or 1 W cm−2 NIR laser irradiation, respectively. Hence, this work is expected to pave the way for using conjugated‐polymer nanoparticles as a powerful photothermal agents for anticancer applications.
Highly Enhanced Curie Temperature in Ga‐Implanted Fe3GeTe2 van der Waals Material
Authors: Yang Mengmeng , Li Qian , Chopdekar Rajesh V. , Stan Camelia , Cabrini Stefano , Choi Jun Woo , Wang Sheng , Wang Tianye , Gao Nan , Scholl Andreas , Tamura Nobumichi , Hwang Chanyong , Wang Feng , Qiu Ziqiang 
Published: February 2020

AbstractAmong many efforts in the research of van der Waals (vdW) magnetic materials, increasing the Curie temperature above room temperature has been at the center of research in developing spintronics technology using vdW materials. Here an effective and reliable method of increasing the Curie temperature of ferromagnetic Fe3GeTe2 vdW materials by Ga implantation is reported. It is found that implanting Ga into Fe3GeTe2 by the amount of 10−3 Ga Å−3 could greatly enhance the Fe3GeTe2 Curie temperature by almost 100%. Spatially resolved microdiffraction and element‐resolved X‐ray absorption spectroscopy show little changes in the Fe3GeTe2 crystal structure and Fe valence state. In addition, the Ga implantation changes the Fe3GeTe2 magnetization from out‐of‐plane direction at low temperature to in‐plane direction at high temperature. The result opens a new opportunity for tailoring the magnetic properties of vdW materials beyond room temperature.
“Novel Dextrin‐Cysteine Schiff Base: A Highly Efficient Sensor for Mercury Ions in Aqueous Environment”
Authors: Mondal Barun , Banerjee Shankha , Ray Jagabandhu , Jana Subinoy , Senapati Sanjib , Tripathy Tridib 
Published: February 2020

AbstractWe report a highly sensitive electrochemical and fluorescence sensor for the detection of toxic environmental pollutant Hg2+ ions by using a novel dextrin‐cysteine‐Schiff base (DCS). The sensor is developed by the periodate oxidation of dextrin followed by Schiff base formation with an amino acid, cysteine. The new characterized DCS is used as an efficient and selective sensor for the detection of Hg2+ ions in aqueous solution both by electrochemical and fluorescence quenching process. The detection limit (LOD) by the electrochemical method is 0.74 nM which is much lower than that by the fluorometric detection, where LOD value is found to be 40.93 μM. The Schiff base/glassy carbon electrode (DCS/GCE) shows an excellent selectivity towards Hg2+ ions compare to other environmentally relevant ions where almost nil current response is observed. The DCS/GCE also exhibits remarkable sensing of Hg2+ in real water samples such as river and tap water. The electrochemical sensing of Hg2+ by DCS is found to be superior to that of fluorescence sensing.
FeCl3‐Mediated Boc Deprotection: Mild Facile Boc‐Chemistry in Solution and on Resin
Authors: Giri Rajat S. , Roy Sayanta , Dolai Gobinda , Manne Srinivasa R. , Mandal Bhubaneswar 
Published: February 2020

AbstractA mild, practical, and straight forward method for Boc deprotection and its use in peptide synthesis both in solution and on solid support is presented. Boc protecting group is removed from the N‐terminal amino acid of the amino acid and the peptide using environment‐friendly cost‐effective Lewis acid, FeCl3. The deprotected amino group undergoes C−N bond formation with the next Boc‐protected amino acid in the presence of a suitable coupling reagent and base. A library of di‐ to tetrapeptides is synthesized with moderate to good yield from standard and nonstandard Boc‐protected amino acids in solution. Most importantly, this protocol can be used for the solid‐phase peptide synthesis (SPPS) using Boc‐protected amino acids on the acid‐sensitive Rink amide resin, which is usually used for Fmoc chemistry. This protocol thus allows practicing Boc chemistry in a greener manner, and on‐demand switching from Fmoc to Boc chemistry and vice‐versa while synthesizing one oligopeptide on the same resin. The inherent orthogonality of Fmoc and Boc chemistry allows facile synthesis of branched and cyclized peptides on the resin as well.
Visualizing Transparent 2D Sheets by Fluorescence Quenching Microscopy
Authors: Kong Zhizhi , Daab Matthias , Yano Hitomi , Huang Haiyue , Breu Josef , Sasaki Takayoshi , Nguyen SonBinh T. , Huang Jiaxing 
Published: February 2020

AbstractThe high‐contrast optical imaging of nearly transparent 2D materials such as clays and some oxide sheets has been an outstanding challenge; yet there is a critical research capability needed in the synthesis and processing of these materials, which show promise in a number of applications including barrier coatings, membranes, and composites. Using delaminated silicate clay and titania sheets as model systems, here it is shown that these weakly quenching, nearly transparent 2D sheets can be readily imaged by fluorescence quenching microscopy (FQM) based on a new mechanism. When these sheets are deposited on strongly quenching substrates, including doped silicon wafers and metals or indium tin oxide‐coated glass slides, they can act as a “spacer” to reduce the degree of quenching of the dye layer by the substrate, appearing as highly visible bright sheets against a dark background. This new FQM strategy can visualize dielectric 2D materials with high contrast and layer resolutions comparable to scanning electron microscopy and atomic force microscopy. When different 2D materials are co‐deposited, FQM not only differentiates them readily based on their quenching capabilities, but also can resolve their vertical stacking sequence based on the contrast of their overlapped areas.
Numerische Modellierung des Kraft‐Verformungsverhaltens vorgespannter Schrauben in L‐Flanschverbindungen
Authors: Wegener Filip , Schwarz Mathias , Glienke Ralf , Marten Frithjof , Seidel Marc 
Published: February 2020

AbstractStahlrohrtürme von Windenergieanlagen sind schwingungsanfällige Tragstrukturen, welche infolge des Anlagenbetriebs wechselnden Beanspruchungen ausgesetzt sind. Dem Ermüdungsfestigkeitsnachweis für den Turm kommt daher eine große Bedeutung zu. Ein neuralgischer Punkt innerhalb der Turmstruktur sind in der Regel die Ringflanschverbindungen, welche die einzelnen Turmsektionen mittels vorgespannter Schrauben miteinander verbinden. In Bezug auf die Ermüdungsfestigkeit dieser Verbindung ist die Sicherstellung einer ausreichend hohen Schraubenvorspannung dabei entscheidend. Für eine realitätsnahe Vorhersage der verbleibenden Vorspannkraft in einer Flanschverbindung nach einer Überbeanspruchung ist eine präzise Erfassung des plastischen Verformungsverhaltens der Schraube‐Mutter‐Verbindung wichtig. In dem vorliegenden Beitrag wird ein numerischer Ansatz zur Vorhersage des Vorspannkraftverlusts von zentrisch und exzentrisch vorgespannten Schraubenverbindungen infolge von hohen Einzellasten vorgestellt, welcher durch Versuche verifiziert wird.
The role of freshwater bioacoustics in ecological research
Authors: Greenhalgh Jack A. , Genner Martin J. , Jones Gareth , Desjonquères Camille 
Published: February 2020

AbstractConventional methodologies used to estimate biodiversity in freshwater ecosystems can be nonselective and invasive, sometimes leading to capture and potential injury of vulnerable species. Therefore, interest in noninvasive surveying techniques is growing among freshwater ecologists. Passive acoustic monitoring, the noninvasive recording of environmental sounds, has been shown to effectively survey biota in terrestrial and marine ecosystems. However, knowledge of the sounds produced by freshwater species is relatively scarce. Furthermore, little is known about the representation of different freshwater taxonomic groups and habitat types within the literature. Here we present results of a systematic review of research literature on freshwater bioacoustics and identify promising areas of future research. The review showed that fish are the focal taxonomic group in 44% of published studies and were studied primarily in laboratory aquaria and lotic habitats. By contrast, lentic habitats and other taxonomic groups have received relatively little research interest. It is particularly striking that arthropods are only represented by 26% of studies, despite their significant contributions to freshwater soundscapes. This indicates a mismatch between the representation of taxonomic groups within the freshwater bioacoustic literature and their relative acoustic contribution to natural freshwater soundscapes. In addition, the review indicates an ongoing shift from behavioral studies, often with focus on a single taxonomic group, towards field‐based studies using ecoacoustic approaches. On the basis of this review we suggest that future freshwater bioacoustics research should focus on passive acoustic monitoring and arthropod sound, which would likely yield novel insights into freshwater ecosystem function and condition.This article is categorized under:
Water and Life > Nature of Freshwater Ecosystems
Water and Life > Conservation, Management, and Awareness
Water and Life > Methods
Covert symmetries in the neutrino mass matrix
Authors: Björkeroth Fredrik , Di Luzio Luca , Mescia Federico , Nardi Enrico 
Published: February 2020

Abstract
The flavour neutrino puzzle is often addressed by considering neutrino mass matrices m with a certain number of vanishing entries (mij = 0 for some values of the indices), since a reduction in the number of free parameters increases the predictive power. Symmetries that can enforce textures zero can also enforce a more general type of conditions f(mij) = 0 with f some function of the matrix elements mij. In this case m can have all entries non-vanishing with no reduction in its predictive power. We classify all generation-dependent U(1) symmetries which, in the presence of two leptonic Higgs doublets, can reduce the number of independent high-energy parameters of type-I seesaw to the minimum number compatible with non-vanishing neutrino mixings and CP violation. These symmetries are broken above the scale where the effective operator is generated and can thus remain covert, in the sense that no explicit evidence of the symmetry can be read off the neutrino mass matrix, and different symmetries can give rise to the same low-energy structure. We find that only two cases are viable: one yields a structure with two zero-textures already considered in the literature, the other has no zero-textures and has never been considered before. It predicts normal ordering, a lightest neutrino mass ∼ 10 meV, a Dirac phase δ ∼ $$ \frac{3\pi }{2} $$

3
π

2

and definite values for the Majorana phases.
Birational geometry of moduli spaces of stable objects on Enriques surfaces
Authors: Beckmann Thorsten 
Published: February 2020

AbstractUsing wall-crossing for K3 surfaces, we establish birational equivalence of moduli spaces of stable objects on generic Enriques surfaces for different stability conditions. As an application, we prove in the case of a Mukai vector of odd rank that they are birational to Hilbert schemes. The argument makes use of a new Chow-theoretic result, showing that moduli spaces on an Enriques surface give rise to constant cycle subvarieties of the moduli spaces of the covering K3.