bluuebunny/crossref_metadata_2025_split huggingface dataset:
Positive coincidence points for a class of nonlinear operators and their applications to matrix equations
Authors: Kedim Imed , Berzig Maher , Ajmi Ahdi Noomen 
Published: August 2020

AbstractConsider an ordered Banach space andf,gf,gtwo self-operators defined on the interior of its positive cone. In this article, we prove that the equationf(X)=g(X)f(X)=g(X)has a positive solution, wheneverfis strictlyα\alpha-concaveg-monotone or strictly(−α)(-\alpha )-convexg-antitone withgsuper-homogeneous and surjective. As applications, we show the existence of positive definite solutions to new classes of nonlinear matrix equations.
Monte Carlo tracking drift-diffusion trajectories algorithm for solving narrow escape problems
Authors: Sabelfeld Karl K. , Popov Nikita 
Published: August 2020

Abstract
This study deals with a narrow escape problem, a well-know difficult problem of evaluating the probability for a diffusing particle
to reach a small part of a boundary far away from the starting position of the particle.
A direct simulation of the diffusion trajectories would take an enormous computer simulation time. Instead, we use a different
approach which
drastically improves the efficiency of the diffusion trajectory tracking algorithm by
introducing an artificial drift velocity
directed to the target position.
The method can be efficiently applied to solve narrow escape problems for domains of long extension in one direction which is the case in many practical problems in biology and chemistry.
The algorithm is meshless both in space and time,
and is well applied to solve high-dimensional problems in complicated domains. We present in this paper a detailed numerical analysis of the method for the case of a rectangular parallelepiped. Both stationary and transient diffusion problems are handled.
CBCT for estimation of the cemento-enamel junction and crestal bone of anterior teeth
Authors: Srebrzyńska-Witek Agnieszka , Koszowski Rafał , Różyło-Kalinowska Ingrid , Piskórz Magdalena 
Published: August 2020

Abstract
The aim of the study is to evaluate the usefulness of cone-beam computed tomography (CBCT) in the assessment of the relationship between the cemento-enamel junction (CEJ) and bone crest of the anterior mandibular cortex. The study population comprised 39 males and 61 females, aged 18–71. A GENDEX GXCB-500 machine, i-CAT Vision and CorelDraw 9 software were used. The distances between the CEJ and bone crest at buccal and lingual sides of six anterior mandibular teeth were measured. Descriptive statistical methods, Student’s t-test and ANOVA were used. The mean distance between the bone crest and CEJ was 2.32 mm ± 0.78 mm at the buccal and 2.52 mm ± 0.85 mm at the lingual side. It was found that in males aged over 50 years, the mean distance at the buccal side was 2.84 mm ± 0.79 mm and was significantly higher than in males aged 49 and less – 2.08 mm ± 0.41 mm. The mean distance at the lingual side was 3.28 mm ± 1.08 mm and was significantly lower in the age group of 49 years and less – 2.10 mm ± 0.41 mm. CBCT allows determining the distance between the CEJ and crestal bone margin at buccal and lingual sides. The data provide crucial information for planning orthodontic treatment, implant placement and periodontal therapy.
Conceptualizing national emergency language competence
Authors: Li Yuming , Rao Gaoqi , Zhang Jie , Li Jia 
Published: August 2020

Abstract
National emergency language competence (NELC) can be understood as the capacity to use language to cope with domestic and international public emergencies. NELC constitutes the foundation of and guidance for the provision of emergency language services. Based on a review of emergency language services and language competence development, this paper proposes a theoretical model for constructing NELC along the following four dimensions: emergency stage, language tasks, non-linguistic resources, and types of emergency languages. The paper concludes with suggestions on the planning and development of NELC.
Crystal structure of bis(6-aminopyridine-2-carboxylato-κ2
O,N)-copper(II), C12H10O6N4Cu
Authors: Du Xigang , Wang Chunwei 
Published: August 2020

Abstract
C12H10O6N4Cu, monoclinic, P21/c (no. 14), a = 3.7015(2) Å, b = 7.3920(4) Å, c = 21.3535(12) Å, β = 91.060(5)°, Z = 2, V = 584.16(6) Å3, R
gt(F) = 0.0319, wR
ref(F2) = 0.0769, T = 293 K.
Crystal structure of catena{(μ2-1,10-phenanthroline-κ4
N,N,N′,N′)-(μ2-1,10-phenanthroline-κ3
N,N,N′)potassium(I) {[bis(2-hydroxyethyl)iminiumyl](sulfanidyl)methyl}sulfanide hemi(1,10-phenanthroline)}, {C24H16KN4, 0.5(C12H8N2), C5H10NO2S2}
Authors: Lo Kong Mun , Lee See Mun , Tiekink Edward R.T. 
Published: August 2020

Abstract
C35H30KN6O2S2, monoclinic, C2/c (no. 15), a = 32.8001(4) Å, b = 7.1562(1) Å, c = 26.0400(3) Å, β = 94.385(1)°, V = 6094.32(13) Å3, Z = 8, R
gt(F) = 0.0315, wR
ref(F
2) = 0.0911, T = 100(2) K.
Accelerated HPSTM: An efficient semi-analytical technique for the solution of nonlinear PDE’s
Authors: Grover Deepak , Sharma Dinkar , Singh Prince 
Published: August 2020

AbstractIn this paper a novel technique i.e. accelerated homotopy perturbation Sumudu transformation method (AHPSTM), which is a hybrid of accelerated homotopy perturbation method and Sumudu transformation to obtain an approximate analytic solution of nonlinear partial differential equation (PDE) with proportional delay, is used. This approach is based on the new form of calculating He’s polynomial, which accelerates the convergence of the series solution. The series solutions obtained from the proposed method are found to converge rapidly to exact solution. In order to affirm the effectiveness and legitimacy of proposed method, the proposed technique is implemented on nonlinear partial differential equation (PDE) with proportional delay. The condition of convergence of series solution is analyzed. Moreover, statistical analysis has been performed to analyze the outcome acquired by AHPSTM and other semi-analytic techniques.
Surface hydrophobicity and oleophilicity of hierarchical metal structures fabricated using ink-based selective laser melting of micro/nanoparticles
Authors: Yu Tianyu , Guo Wenfeng , Wang Xinjian , Liu Junyan , Wang Yang , Chen Mingjun 
Published: August 2020

Abstract
Hierarchical structures have attracted considerable interest due to their super-oleophobic/super-hydrophobic behavior. However, it is rare to present a novel additive manufacturing (AM) approach to fabricate hierarchical metal structures (HMSs). A micro/nano mixture ink was deposited on a substrate and a laser was used to selectively scan the ink layer. A new layer of ink was deposited on the previous consolidation layer during manufacturing. The surfaces of the as-sintered HMSs exhibit inherently super-hydrophilic and super-oleophobic behavior with a 155° contact angle (CA) with oil. Furthermore, the HMSs were successfully turned into super-hydrophobic and super-oleophilic mode (with a 152° CA) after surface modification with a solvent-free, electrostatic polytetrafluoroethylene particle deposition. They can be used as oil/water separation media by the functional surfaces existing in the pore channels. The experimental study of HMSs shows an effective removal of oil contaminants from water. The developed process also possesses an advantage of AM of HMSs with complex shapes in ambient air under the protection of an organic ink. Importantly, the present approach could be extended to a vast number of HMSs, for the preparation of highly durable functional materials for various applications.
Second language acquisition from Syrian refugees’ perspectives: Difficulties and solutions
Authors: Al Masri Hayat , Abu-Ayyash Emad A. S. 
Published: August 2020

AbstractThe current study explored the second language acquisition (SLA) difficulties that 45 Syrian refugees and asylum seekers encountered in nine countries (Germany, Turkey, Sweden, Denmark, Norway, France, Malay, Austria, and Romania) that they fled to away from the ongoing war in Syria. The study also sought to elicit the solutions for these difficulties from the participants’ views. This research employed interviews and an open-ended questionnaire utilizing the Facebook Messenger application to gather data. The study builds on and broadens the scope of language acquisition research and questions main SLA theoretical underpinnings. The study found a variety of difficulties pertinent to economic, personal, social, linguistic, temporal, and psychological factors. The participants’ recommendations were classified into refugee-based, community-based, and authority-based ones.
The Battle of Objects and Subjects: Concerning Sbriglia and Žižek’sSubject LessonsAnthology
Authors: Harman Graham 
Published: August 2020

AbstractThis article mounts a defense of Object-Oriented Ontology (OOO) from various criticisms made in Russell Sbriglia and Slavoj Žižek’s co-edited anthologySubject Lessons. Along with Sbriglia and Žižek’s own Introduction to the volume, the article responds to the chapters by Todd McGowan, Adrian Johnston, and Molly Anne Rothenberg, the three in which my own version of OOO is most frequently discussed.
Disaster Preparedness of Academic Libraries: A Case Study From Indonesia
Authors: Rachman Yeni Budi 
Published: August 2020

Abstract
Disaster preparedness activities are important for libraries, as they collect and provide access to information and knowledge of human intellectual ideas and work. This study aims to identify potential disasters that may be experienced by academic libraries in Indonesia as well as their disaster preparedness activities. A quantitative approach was used to survey 85 academic library representatives who attended an academic librarian forum in Jakarta, Indonesia. The results identified the many types of natural and manmade disasters that have already and continue to threaten collections and services of respondent libraries. In addition to earthquakes and floods, threats include risks from human actions such as theft and vandalism, as well as problems arising from unstable electrical power supplies, and hardware and software malfunctions. This study also found that the majority of libraries participating in the study do not have a disaster preparedness plan.
More Valuable than Blood and Treasure? Experimental Evidence on the Impact of Status on Domestic Preferences for Military Intervention
Authors: Viskupič Filip 
Published: August 2020

Abstract
Does status have an independent effect on how countries relate to each other? While scholars long argued that status is a salient foreign policy driver, it has been challenging to establish a causal link between status and foreign policy outcomes. In this project, I use original survey data to evaluate the effect of status on foreign policy decision-making, in particular popular support for military intervention. In an online survey experiment, 3658 United States citizens were confronted with a hypothetical foreign policy scenario in which their country’s status was threatened. The results show that the presence of a status threat increases support for military intervention, even in situations where national security interests are at stake and casualties are likely. I also find that government’s unwillingness to use force to protect the country’s status leads to decreased government approval. Overall, the results provide strong evidence that status is an important foreign policy driver and a source of domestic audience costs.
Microcellular foaming behavior of ether- and ester-based TPUs blown with supercritical CO2
Authors: Batı Bige , Küçük Emine Büşra , Durmuş Ali , Nofar Mohammadreza 
Published: August 2020

Abstract
The bead foaming behavior of ether- and an ester-based Tensor Processing Unit (TPU) resins were investigated in a lab-scale reactor using supercritical CO2 as the blowing agent. The samples were saturated at various saturation temperatures and the effects of hard segment crystallization during the saturation on the foaming behavior of the TPU samples were explored. The results revealed that the different HS crystallization tendencies and possible CO2 solubility differences in two TPU grades led to their different foaming behaviors. The ester-based TPU could be foamed within a wider saturation temperature range and revealed an easier cell growth and foam expansion while the ether-based TPU showed a more limited cell growth behavior and hence processing window. The effect of pre-annealing and hence the isothermally induced HS crystallization on the foaming behavior of the ether-based TPU and the influence of depressurization rate on the foaming behavior of ester-based TPU was also explored.
Low-temperature separation of helium-helion mixture
Authors: Bubenchikov Alexey Mikhailovich , Bubenchikov Mikhail Alekseevich , Jambaa Soninbayar , Lun-Fu Aleksandr Viktorovich , Chelnokova Anna Sergeevna 
Published: August 2020

Abstract
The research is devoted to the problem of designing materials with an adjustable property of permeability. The obtained tool for property regulation allows achieving hyper-selectivity in relation to separation of helium isotope mixtures, as well as some other gas mixtures. The reasearch is theoretical in nature; however, it suggests a clear direction of activity for experimenters. The result obtained is valid for ultrathin barriers of any form. As a result, a new exact solution of the Schrödinger equation of wave dynamics, which is valid for the case of two-barrier systems, is found. This solution allows for comprehensive consideration of the process of wave passage through a barrier and identification of the causes leading to super-permeability of individual components.
Preparation and properties of composite materials containing graphene structures and their applicability in personal protective equipment: A Review
Authors: Kośla Katarzyna , Olejnik Magdalena , Olszewska Karolina 
Published: August 2020

AbstractGraphene is a new, advanced material with many possible applications in basic and clinical medicine, electronics and automation. Graphene compounds can be successfully used as an integral part of drug delivery systems, in the construction of transistors, polar processors, touch screens, solar cells and in the production of materials for the manufacture of personal protective equipment,i.e.products and equipment intended to protect the health and life of users. The literature review presented in this paper concerns physical and mechanical properties of composites containing graphene or its structure as well as methods of obtaining polymer, metallic and ceramic composites doped with graphene structures. Data analysis of the potential use of graphene and its composites in personal protective equipment such as monitoring sensors, clothing and security equipment such as ballistic armor, helmets and protective clothing were also reviewed and summarized.
Improving the microstructure and mechanical properties of laser cladded Ni-based alloy coatings by changing their composition: A review
Authors: Yinghua Lin , Xuelong Ping , Jiacai Kuang , Yingjun Deng 
Published: August 2020

AbstractNi-based alloy coatings prepared by laser cladding has high bonding strength, excellent wear resistance and corrosion resistance. The mechanical properties of coatings can be further improved by changing the composition of alloy powders. This paper reviewed the improved microstructure and mechanical properties of Ni-based composite coatings by hard particles, single element and rare earth elements. The problems that need to be solved for the particle-reinforced nickel-based alloy coatings are pointed out. The prospects of the research are also discussed.
Mini-Review of Analytical Methods used in Quantification of Ellagic Acid
Authors: Agrawal Ojaskumar D. , Kulkarni Yogesh A. 
Published: August 2020

Abstract
Ellagic acid is an important phytochemical present in different plants such as Strawberry, Grapes, Blackberry, Raspberry etc. Chemically, ellagic acid is 2, 3, 7, 8-tetrahydroxychromeno [5, 4, 3-cde] chromene-5, 10-dione. It is an organic heterotetracyclic compound resulting from the dimerization of gallic acid molecules by oxidative aromatic coupling with intramolecular lactonization. Ellagic acid has been reported for various pharmacological activities such as anti-inflammatory, neuroprotective, cardioprotective, antioxidant, anti-mutagenic etc. Various analytical methods based on spectrophotometry, chromatography, hyphenated techniques, capillary zone electrophoresis etc. have been developed for identification and quantification of ellagic acid in natural sources and formulations. The present review provides detailed information on quantitative analysis of ellagic acid present in Strawberry, Grapes, Blackberry, Raspberry, Cranberry; Syzygium cumini seed extract, Woodfordia fruticosa plant extract, Potentilla species extracts etc. It also focuses on analytical methods for quantification of ellagic acid in herbal and traditional formulations such as Ashwagandharishta, Triphala churna, Dhatrinisha churna, Arjunarishta, Manjisthadi churna.
Solvent impregnated resins for the treatment of aqueous solutions containing different compounds: a review
Authors: Batra Sakshi , Awasthi Anjali , Iqbal Muzaffar , Datta Dipaloy 
Published: August 2020

Abstract
In this review paper, a complete study and analysis of the research articles dealing with the removal of various organic and inorganic pollutants using solvent impregnated resins (SIR) is carried out. The method of impregnation, characterizations of prepared resin, and regeneration techniques of different SIRs for batch and continuous fixed bed columns are presented. The effects of different operating parameters (e.g., loading of solvent on the resin, dosage of adsorbent, initial solute concentration, pH, temperature, time, ionic strength) on the separation efficiency of SIR in the batch mode are discussed. Thermodynamic parameters (change in Gibbs free energy, enthalpy, and entropy) are tabulated from the data available in the literature, and if not given, then their values are calculated and presented. The influence of parameters (flow rate, bed height, pH, concentration of the solution, etc.) on the fixed bed column performance is analyzed. Design aspects of the column are also discussed, and the dimensions of fixed bed columns for industrial applications are proposed.
Role of Reynolds and Archimedes numbers in particle-fluid flows
Authors: Kalman Haim 
Published: August 2020

Abstract
Any scientific behavior is best represented by nondimensional numbers. However, in many cases, for pneumatic conveying systems, dimensional equations are developed and used. In some cases, many of the nondimensional equations include Reynolds (Re) and Froude (Fr) numbers; they are usually defined for a limited range of materials and operating conditions. This study demonstrates that most of the relevant flow types, whether in horizontal or vertical pipes, can be better described by Re and Archimedes (Ar) numbers. Ar can also be used in hydraulic conveying systems. This paper presents many threshold velocities that are accurately defined by Re as a simple power function of Ar. Many particulate materials are considered by Ar, thereby linking them to a common behavior. Using various threshold velocities, a flow regime chart for horizontal conveying is presented in this paper.
Nanomaterial integration into the scaffolding materials for nerve tissue engineering: a review
Authors: Arzaghi Hamidreza , Adel Bashir , Jafari Hossein , Askarian-Amiri Shaghayegh , Shiralizadeh Dezfuli Amin , Akbarzadeh Abolfazl , Pazoki-Toroudi Hamidreza 
Published: August 2020

Abstract
The nervous system, which consists of a complex network of millions of neurons, is one of the most highly intricate systems in the body. This complex network is responsible for the physiological and cognitive functions of the human body. Following injuries or degenerative diseases, damage to the nervous system is overwhelming because of its complexity and its limited regeneration capacity. However, neural tissue engineering currently has some capacities for repairing nerve deficits and promoting neural regeneration, with more developments in the future. Nevertheless, controlling the guidance of stem cell proliferation and differentiation is a challenging step towards this goal. Nanomaterials have the potential for the guidance of the stem cells towards the neural lineage which can overcome the pitfalls of the classical methods since they provide a unique microenvironment that facilitates cell–matrix and cell–cell interaction, and they can manipulate the cell signaling mechanisms to control stem cells’ fate. In this article, the suitable cell sources and microenvironment cues for neuronal tissue engineering were examined. Afterward, the nanomaterials that impact stem cell proliferation and differentiation towards neuronal lineage were reviewed.
Picking Winners: Identifying Leading Sectors for Egypt and Tunisia Using the Product Space Methodology
Authors: El-Haddad Amirah 
Published: August 2020

Abstract
The structural transformation of countries moves them towards more sophisticated, higher-value products. Network analysis, using the Product Space Methodology (PSM), guides countries towards leading export sectors. The identification process rests on two pillars: (1) available opportunities, that is, products in the product space that the country does not yet export which are more sophisticated than its current exports; and (2) the stock of a country’s accumulated productive knowledge and the technical capabilities that, through spillovers, enable it to produce slightly more sophisticated products. The PSM points to a tradeoff between capabilities and complexity. It identifies very basic future products that match the two countries’ equally basic capabilities. Top products are simple animal products, cream and yogurt, modestly sophisticated plastics, metals and minerals such as salt and sulphur for Egypt; and slightly more sophisticated products such as containers and bobbins (plastics) and broom handles and wooden products for Tunisia, which is the more advanced of the two countries. A more interventionist approach steers the economy towards maximum sophistication, thus identifying highly complex manufactured metals, machinery, equipment, electronics and chemicals. Despite pushing for economic growth and diversification, these sectors push urban job creation and require high-skill workers, with the implication that low-skilled labour may be pushed into unemployment or into low-value informal jobs. A middle ground is a forward-looking strategy that takes sectors’ shares in world trade into account.
Mathematical immunology: from phenomenological to multiphysics modelling
Authors: Bocharov Gennady A. , Grebennikov Dmitry S. , Savinkov Rostislav S. 
Published: August 2020

AbstractMathematical immunology is the branch of mathematics dealing with the application of mathematical methods and computational algorithms to explore the structure, dynamics, organization and regulation of the immune system in health and disease. We review the conceptual and mathematical foundation of modelling in immunology formulated by Guri I. Marchuk. The current frontier studies concerning the development of multiscale multiphysics integrative models of the immune system are presented.
Global optimization based on TT-decomposition
Authors: Zheltkov Dmitry , Tyrtyshnikov Eugene 
Published: August 2020

AbstractIn contrast to many other heuristic and stochastic methods, the global optimization based on TT-decomposition uses the structure of the optimized functional and hence allows one to obtain the global optimum in some problem faster and more reliable. The method is based on the TT-cross method of interpolation of tensors. In this case, the global optimum can be found in practice even in the case when the approximation of the tensor does not possess a high accuracy. We present a detailed description of the method and its justification for the matrix case and rank-1 approximation.