bluuebunny/crossref_metadata_2025_split huggingface dataset:
Authentic versus synthetic: An investigation of the influences of study settings and task configurations on search behaviors
Authors: Wang Yiwei , Shah Chirag 
Published: July 2021

AbstractIn information seeking and retrieval research, researchers often collect data about users' behaviors to predict task characteristics and personalize information for users. The reliability of user behavior may be directly influenced by data collection methods. This article reports on a mixed‐methods study examining the impact of study setting (laboratory setting vs. remote setting) and task authenticity (authentic task vs. simulated task) on users' online browsing and searching behaviors. Thirty‐six undergraduate participants finished one lab session and one remote session in which they completed one authentic and one simulated task. Using log data collected from 144 task sessions, this study demonstrates that the synthetic lab study setting and simulated tasks had significant influences mostly on behaviors related to content pages (e.g., page dwell time, number of pages visited per task). Meanwhile, first‐query behaviors were less affected by study settings or task authenticity than whole‐session behaviors, indicating the reliability of using first‐query behaviors in task prediction. Qualitative interviews reveal why users were influenced. This study addresses methodological limitations in existing research and provides new insights and implications for researchers who collect online user search behavioral data.
The transferred translocases: An old wine in a new bottle
Authors: Balaji S. 
Published: July 2021

AbstractThe role of translocases was underappreciated and was not included as a separate class in the enzyme commission until August 2018. The recent research interests in proteomics of orphan enzymes, ionomics, and metallomics along with high‐throughput sequencing technologies generated overwhelming data and revamped this enzyme into a separate class. This offers a great opportunity to understand the role of new or orphan enzymes in general and specifically translocases. The enzymes belonging to translocases regulate/permeate the transfer of ions or molecules across the membranes. These enzyme entries were previously associated with other enzyme classes, which are now transferred to a new enzyme class 7 (EC 7). The entries that are reclassified are important to extend the enzyme list, and it is the need of the hour. Accordingly, there is an upgradation of entries of this class of enzymes in several databases. This review is a concise compilation of translocases with reference to the number of entries currently available in the databases. This review also focuses on function as well as dysfunction of translocases during normal and disordered states, respectively.
Preparation of flame‐retardant, hydrophobic, ultraviolet protective, and luminescent transparent wood
Authors: Aldalbahi Ali , El‐Naggar Mehrez E. , Khattab Tawfik A. , Hossain Mokarram 
Published: July 2021

AbstractTransparent wood with multifunctional properties has recently attracted more attention as an efficient building product. Here, we describe the development of transparent wood with long‐persistent phosphorescence, tough surface, high durability, photostability, and reversibility without fatigue, and with ultraviolet shielding, superhydrophobicity, and flame‐retardant activity. This long‐persistent phosphorescent, or glow‐in‐the‐dark, smart wood exhibited an ability to continue emitting light for prolonged periods of time. The photoluminescent translucent wooden substrate was prepared by immobilizing lignin‐modulated wooden bulk with an admixture of methylmethacrylate (MMA), ammonium polyphosphate (APP), and lanthanide‐doped strontium aluminate (LSA; SrAl2O4:Eu2+,Dy3+) phosphor nanoparticles. The photoluminescent transparent wood displayed a colour switch from colourless to bright white beneath ultraviolet (UV) light and greenish‐yellow in the dark as reported by Commission Internationale de l'Éclairage laboratory colorimetric space coordinates. The generated phosphorescent wooden substrates demonstrated an absorbance band at 365 nm and an emission band at 516 nm. The phosphorescent transparent wood was improved flame‐retardant properties, ultraviolet shielding, and superhydrophobic properties, as well as a reversible long‐persistent phosphorescent responsiveness to UV light without fatigue. The current approach demonstrated a potential large‐scale production strategy for multifunctional transparent wooden substrates for a range of applications such as smart windows, gentle indoor and outdoor lighting, and safety directional signs in buildings.
Moderating role of psychological empowerment on the relationship between green HRM practices and millennial employee retention in the hotel industry of Bangladesh
Authors: Islam Md Asadul , Hack‐Polay Dieu , Haque Ahasanul , Rahman Mahfuzur , Hossain Md Shahadat 
Published: July 2021

AbstractThe purpose of the paper is to examine the relationship between green human resource management (GHRM) practices such as green recruitment, green training, green performance management, green reward, green involvement and millennial employee retention in the hotel industry in Bangladesh. The study examined the moderating effect of psychological empowerment on the relationship between GHRM practices and millennials' retention. This study used a survey questionnaire of 394 employees in Bangladeshi 3‐star to 5‐star hotels to test hypotheses using SmartPLS. The study found that green reward and green training have significant relationships with millennials' retention in hotels. The results showed psychological empowerment as a significant moderator on the relationship between three GHRM practices, green training, green performance management, green and reward and millennials' retention. With significant environmental degradation in South‐Asia, this study establishes GHRM can reconcile environmental regeneration and business strategy in the hotel industry, whose environmental footprint is increasingly under scrutiny.
Pursuing sustainable development through green entrepreneurship: An institutional perspective
Authors: Zhao Mengli , Liu Jinxin , Shu Chengli 
Published: July 2021

AbstractPursuing sustainable development through green entrepreneurship has been advocated, conceptualized, and empirically examined in the recent environmental management and entrepreneurship literature. However, green entrepreneurs are embedded in institutional environments that may discourage them from embracing sustainable development because of the “paradox of embedded agency.” How can a firm overcome the liability of such an agency issue and escape what has become known as a “green prison”? This study proposes that, because international venturing exposes firms to foreign institutions, it provides them with opportunities for institutional learning. Thus, we examine how international venturing influences green entrepreneurship which, in turn, impacts firm performance. Specifically, based on institutional theory, this study develops a firm‐level green entrepreneurship framework with three dimensions: green initiatives (a firm's active adoption of green practices), received government green support (benefits that a firm gains from the government by adapting to governmental incentives, programs, and policies related to green practices), and green political influence (a firm's attempts to influence legislation that enacts laws, rules, and regulations related to green practices). The results obtained by analyzing 152 firms that engage in international venturing activities and 151 firms that do not show that international venturing is positively associated with green initiatives and government green support while these two factors further directly enhance firm performance and mediate the effects of international venturing on performance.
Improved Catalytic Activity and Stability of Ba Substituted SrTiO3 Perovskite for Oxidative Coupling of Methane
Authors: Wang Yue , Yang Xiao , Hou Chenxiao , Yin Fumin , Wang Guowei , Zhu Xiaolin , Jiang Guiyuan , Li Chunyi 
Published: July 2021

AbstractPerovskite oxides are widely used as the catalyst for oxidative coupling of methane (OCM). The partial substitution of A or B sites in ABO3 perovskites with heteroatoms was effective in improving the catalytic performance, but the promoting mechanism has not been thoroughly studied. In this work, the partial substitution of Sr with Ba in SrTiO3 perovskite was demonstrated to improve both the OCM reaction activity and stability. Compared with SrTiO3 and BaTiO3, the crystal size of Ba0.5Sr0.5TiO3 was greatly reduced (∼55 nm), the amount of surface chemisorbed oxygen species acting as the alkaline active centers for OCM was increased, and the electrophilic lattice oxygens with higher electronegativity rapidly replenishing the surface alkaline active sites were obtained. Thereby, a higher C2 yield (∼18 %) and C2H4/C2H6 ratio (∼1.7) were simultaneously achieved. Furthermore, the enhanced reaction stability was attributed to the better thermal resistance of nano‐sized Ba0.5Sr0.5TiO3 perovskite.
Sublimated Se‐Induced Formation of Dual‐Conductive Surface Layers for High‐Performance Ni‐Rich Layered Cathodes
Authors: Chen Shi , Wang Zirun , Chen Lai , Liu Na , Li Ning , Lu Yun , Cao Duanyun , Fu Nuoting , Li Qing , Su Yuefeng , Wu Feng 
Published: July 2021

AbstractNi‐rich layered oxide cathode materials for Li‐ion batteries have received widespread attention owing to their high specific capacity and comparatively low cost. However, owing to Li‐containing surface residues, side reactions with the electrolyte and structural rearrangement after long‐term cycling leads to severe degradation of the cathode performance. Here, Se coating serves as a novel and simple sublimation‐inducing gas reaction method to modify the Ni‐rich layered material, resulting in capacity retention and rate performance improvement. The sublimed gaseous Se reacts with residual Li compounds to form a Li2SeO4 coating on the surface of the secondary particles, which simultaneously promotes the transmission of Li ions and reduces electrode‐electrolyte side reactions. Moreover, gaseous Se penetrates between the primary particles within the secondary particles to promote electron transmission. This dual‐conductive surface layer facilitates superior capacity and voltage retentions. Significantly, the proposed method is scalable and applicable to all Ni‐rich cathode materials.
Mechanistic Investigation of a Synthetic Route to Biaryls by the Sigmatropic Rearrangement of Arylsulfonium Species
Authors: Yanagi Tomoyuki , Yorimitsu Hideki 
Published: July 2021

AbstractA comprehensive mechanistic investigation was conducted on the coupling reaction of aryl sulfoxides with phenols by using trifluoroacetic anhydride to yield biaryls. NMR experiments revealed that our previously proposed mechanism, which consists of a cascade of an interrupted Pummerer reaction and a rate‐determining [3,3] sigmatropic rearrangement, is reasonable. The electronic effects of the substrates were also evaluated to elucidate the nature of the rearrangement step. Based on experimental observations and theoretical calculations, we conclude that the rearrangement is highly asynchronous and stepwise rather than concerted when electron‐rich phenols are employed for the reaction.
Design and Synthesis of Nitrogen‐Rich Azo‐Bridged Furoxanylazoles as High‐Performance Energetic Materials
Authors: Larin Alexander A. , Shaferov Alexander V. , Kulikov Alexander S. , Pivkina Alla N. , Monogarov Konstantin A. , Dmitrienko Artem O. , Ananyev Ivan V. , Khakimov Dmitry V. , Fershtat Leonid L. , Makhova Nina N. 
Published: July 2021

AbstractA series of novel energetic materials comprising of azo‐bridged furoxanylazoles enriched with energetic functionalities was designed and synthesized. These high‐energy materials were thoroughly characterized by IR and multinuclear NMR (1H, 13C, 14N) spectroscopy, high‐resolution mass spectrometry, elemental analysis, and differential scanning calorimetry (DSC). The molecular structures of representative amino and azo oxadiazole assemblies were additionally confirmed by single‐crystal X‐ray diffraction and X‐ray powder diffraction. A comparison of contributions of explosophoric moieties into the density of energetic materials revealed that furoxan and 1,2,4‐oxadiazole rings are the densest motifs while the substitution of the azide and amino fragments on the nitro and azo ones leads to an increase of the density. Azo bridged energetic materials have high nitrogen‐oxygen contents (68.8–76.9 %) and high thermal stability. The synthesized compounds exhibit good experimental densities (1.62–1.88 g cm−3), very high enthalpies of formation (846–1720 kJ mol−1), and, as a result, excellent detonation performance (detonation velocities 7.66–9.09 km s−1 and detonation pressures 25.0–37.7 GPa). From the application perspective, the detonation parameters of azo oxadiazole assemblies exceed those of the benchmark explosive RDX, while a combination of high detonation performance and acceptable friction sensitivity of azo(1,2,4‐triazolylfuroxan) make it a promising potential alternative to PETN.
Structure Recovery and Recycling of Used LiCoO2 Cathode Material
Authors: Liang Qian , Yue Haifeng , Zhou Weishan , Wei Qiang , Ru Qiang , Huang Yuan , Lou Hongtao , Chen Fuming , Hou Xianhua 
Published: July 2021

AbstractA large number of lithium batteries have been retiring from the market of energy storage. Thus, recycling of the used electrode materials is becoming urgent. In this study, an industrial machinery processing was used to recover the crystal structure of the waste LiCoO2 materials with the combination of small‐scale equipment repair technology. The results show that the crystal parameters of the repaired LiCoO2 material become small, the unit cell volume is reduced, and the crystal structure tends to be stable. The Co−O bond length of 1.9134 nm, O−Co−O bond angle of 94.72°, the (003) interplanar spacing of 0.467 nm indicate the excellent recovery level of the repaired LiCoO2. In addition, the electrochemical performance of the repaired LiCoO2 material is greatly improved, compared with the waste material. The capacity of the repaired electrode material can be maintained at 120 mAh g−1 after 100 cycles at the current density of 0.2C. The promising rate performance of the repaired electrode material demonstrates the stable structure. This research work provides a large‐scale method for the direct recovery of LiCoO2 with the reduction of unnecessary energy and reagent consumption, which will be beneficial to the environmental protection.
General, Straightforward, and Atom‐Economical Synthesis of Vinyl Triflimides
Authors: Hao Lei , Pan Qianwen , Zhang Congdi , Wang Sen , Wang Weilin , Zhang Junjie , Bai Lu , Wang Youliang 
Published: July 2021

AbstractVinyl triflimides were only accessible recently and their chemistry is yet to be discovered. Herein, we describe a general, straightforward and atom‐economical synthesis of these materials from alkynes and triflimide. A vast array of terminal and internal alkynes with broad spectrum of functionalities could be employed to generate various di‐ and trisubstituted vinyl triflimides regiospecifically with high to specific stereoselectivity. Moreover, the protocol could be conducted on gram scale using terminal and internal alkynes. Preliminarily attempts to probe the unprecedented reactivity of vinyl triflimides revealed part of its chemical properties.
Iron(II)‐Catalyzed Aerobic Biomimetic Oxidation of N‐Heterocycles
Authors: Manna Srimanta , Kong Wei‐Jun , Bäckvall Jan‐E. 
Published: July 2021

AbstractHerein, an iron(II)‐catalyzed biomimetic oxidation of N‐heterocycles under aerobic conditions is described. The dehydrogenation process, involving several electron‐transfer steps, is inspired by oxidations occurring in the respiratory chain. An environmentally friendly and inexpensive iron catalyst together with a hydroquinone/cobalt Schiff base hybrid catalyst as electron‐transfer mediator were used for the substrate‐selective dehydrogenation reaction of various N‐heterocycles. The method shows a broad substrate scope and delivers important heterocycles in good‐to‐excellent yields.
Preparation of polyvinyl alcohol–chitosan–NH4Br catalyst and its application to cycloaddition of carbon dioxide to propylene oxide
Authors: Kim Hak‐Min , Oh Kyeongseok , Kyung Daeseung , Ahn Han‐geun , Yoon Inhwan , Kwak Soonjong , Nah In Wook 
Published: July 2021

AbstractAn eco‐friendly polyvinyl alcohol (PVA)–chitosan(CS)–NH4Br catalyst was prepared using a modified solution method. Although the amounts of PVA and CS were fixed, the amount of NH4Br was varied in the range 15–45 wt.%. The catalytic performance of PVA–CS–NH4Br was compared based on the carbonation performance in the presence of single‐component catalysts (PVA, CS, and NH4Br) and dual component catalyst (PVA–CS). The catalytic activity of PVA–CS was inadequate and considerably less than that observed when either PVA or CS was exclusively loaded. The number of functional groups within the PVA–CS structure was presumed to have been reduced due to the interactions of the OH groups in PVA and CS. However, the PVA–CS–NH4Br catalyst distinctively exhibited its catalytic performance. It has been suggested that NH4Br aided in sustaining the innate functional groups that both PVA and CS have within the PVA–CS–NH4Br structure. These results indicate that the functional groups and nucleophiles within the PVA–CS–NH4Br structure more effectively participated in the carbonation of propylene oxide. Quantitatively, the addition of 30 wt.% NH4Br yielded the best performance. Characteristic analyses of the catalysts were performed using X‐ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, and X‐ray photoelectron spectroscopy.
Arnold Diffusion, Quantitative Estimates, and Stochastic Behavior in the Three‐Body Problem
Authors: Capiński Maciej J. , Gidea Marian 
Published: July 2021

AbstractWe consider a class of autonomous Hamiltonian systems subject to small, time‐periodic perturbations. When the perturbation parameter is set to zero, the energy of the system is preserved. This is no longer the case when the perturbation parameter is non‐zero.We describe a topological method to establish orbits which diffuse in energy for every suitably small perturbation parameter . The method yields quantitative estimates:
the existence of orbits along which the energy drifts by an amount independent of ε; the time required by such orbits to drift is ;
the existence of orbits along which the energy makes chaotic excursions;
explicit estimates for the Hausdorff dimension of the set of such chaotic orbits;
the existence of orbits along which the time evolution of energy approaches a stopped diffusion process (Brownian motion with drift), as ε tends to 0. For each ε fixed, the set of initial conditions of the orbits that yield the diffusion process has positive Lebesgue measure, and in the limit the measure of these sets approaches 0. Moreover, we can obtain any desired values of the drift and variance for the limiting Brownian motion for appropriate sets of initial conditions.

A key feature of our topological method is that it can be implemented in computer‐assisted proofs. We give an application to a concrete model of the planar elliptic restricted three‐body problem, on the motion of an infinitesimal body relative to the Neptune‐Triton system. © 2021 The Authors. Communications on Pure and Applied Mathematics published by Wiley Periodicals LLC.
A novel visualization approach for data provenance
Authors: Yazici Ilkay Melek , Aktas Mehmet S. 
Published: July 2021

SummaryData provenance has led to a developing need for the technologies to empower end‐users to assess and take action on the data life cycle. In the Big Data era, companies' amount of data over the world increases each day. As data increases, metadata on the data origin and lifecycle of data also overgrows. Thus, this requires innovations that can provide a better understanding and interpretation of data using data provenance. This study addresses the challenge of extracting data in the form of graphs from scientific workflows and facilitating demanded visualization approaches such as graph comparison, summarization, backward‐forward querying, and stream data visualization. W3C‐PROV‐O provenance specification is implemented via a visualization tool to assess the applicability of proposed algorithms. The proposed algorithms are tested on a large‐scale provenance dataset to explore their performance. In addition, this study discusses the details of a comprehensive usability study of the prototype visualization tool. Results indicate that proposed visualization approaches are usable and processing overhead is insignificant.
Coping with cold: Sorghum cold stress from germination to maturity
Authors: Casto Anna L. , Murphy Katherine M. , Gehan Malia A. 
Published: July 2021

AbstractSorghum [Sorghum bicolor (L.) Moench] is an important crop that is highly drought tolerant but susceptible to low temperatures. Many studies have begun to explore the genetic basis of variation in chilling sensitivity in the sorghum germplasm in an effort to improve sorghum's chilling tolerance. However, differences in genetic maps and updates to the sorghum reference genome have made comparing studies of chilling in sorghum challenging. Here, we review the current state of research on chilling tolerance and susceptibility in sorghum during germination and emergence, vegetative growth, and reproduction and harvest stages. Using the most recent sorghum reference genome (v3.1), we have standardized the locations of quantitative trait loci and marker‐trait associations for chilling tolerance traits across the literature. This revealed substantial overlap between quantitative trait loci/marker‐trait associations identified for similar traits across studies of different sorghum populations. Chromosomes 2, 3, and 6 contained particularly concentrated regions of markers associated with chilling tolerance traits. Although many studies have uncovered genetic variation for chilling responses in the sorghum germplasm, follow‐up studies are needed to confirm and characterize the molecular mechanisms responsible for variation in chilling tolerance in sorghum. We discuss potential molecular mechanisms for cold stress tolerance based on agreements between studies and address the challenges and opportunities for increasing chilling tolerance in sorghum and other next‐generation crops.