bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evidencing Human Occupation of a Small Island Through Ancient Glass: The Case of Ustica (Palermo, Italy)
Authors: Martin Franco Foresta , Barca Donatella , Posedi Ivona 
Published: August 2020

AbstractThe subject of this study consists of 17 ancient glass fragments from the island of Ustica (Palermo, Italy) obtained from local museums. All the 17 glass fragments are stratigraphically decontextualized, as they were collected by archaeological surface surveys. Each fragment was analyzed by Electron Micro Probe Analyzer coupled with an Energy Dispersive X-Ray System (EMPA-EDS) and by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) to obtain the composition of major, minor and trace elements. Surface analyses revealed the presence of corrosion layers in most of the glass fragments which was evident also in the chemical data. Nevertheless, reconstruction of the glassmaking processes and the approximate period of production was possible for almost all the glass fragments. Less than half of the examined fragments are attributable to recognizable typologies as unguentaria, beakers, bottles, and vases; all the other small fragments are typologically undetermined. Out of 17 fragments only one fragment is of HLLA composition possibly being produced in 17th–18th century AD, while all the others can be attributed to soda glass with different periods of production: natron glass from Roman and Early Medieval period, plant-ash glass from High or Late Medieval period with the exception of possible Byzantine glass from 6th century AD, and synthetic soda glasses typical of modern era. These data confirm the discontinuous habitation of the island from the Roman period as well as the import of glass objects to the island.
Numerals in Akebu
Authors: Makeeva Nadezhda , Shluinsky Andrey 
Published: August 2020

AbstractThis article presents an overview of the numeral system in Akebu, a Kwa language of Togo. The Akebu numeral system is a decimal one and contains simple numerals from ‘1’ to ‘9’ and decimal bases for ‘10’, ‘100’, and ‘1,000’. The former have noun class agreement markers, while the latter do not. Only some noun classes are compatible with numerals, but among them there are both plural and singular classes.
Delivering Balinese Dance to the Digital Era: Multimedia-Enriched Dictionary
Authors: Suandi I. Nengah , Bandem I. Made , Mudana I. Wayan , Partami Ni Luh , Aryanto Kadek Yota Ernanda 
Published: August 2020

Abstract
Balinese dance is the intangible cultural heritage which has become one of the main tourism draws in Indonesia, and worldwide that offers various cultural wealth with its unique qualities. It has strong characteristics, shown through the movements, music, and costumes. The richness of Balinese dance has attracted people, both scholars and tourists, to learn it. Unfortunately, it also presents a challenge for people who have just begun to learn it, due to their unfamiliarity with its terms taken from the local Balinese language. An Android-based application aimed at remedying this problem has been developed and has been evaluated for its main features and functionality. Several suggestions from initial users have been obtained and utilized for further development of the dictionary. By maintaining the multimedia features, the dictionary has become not only a reference for terms but also a practical reference for the dance movement itself. The results of the user survey suggested that further development using advanced technology could deliver more appealing experiences in learning Balinese dance. Furthermore, most of the respondents stated that the current development is appropriate as an early step in the efforts to preserve the record of Balinese dance.
Using 3D/VR for Research and Cultural Heritage Preservation: Project Update on the Virtual Ganjali Khan Project
Authors: Bozorgi Khosrow , Lischer-Katz Zack 
Published: August 2020

Abstract
This paper describes the Virtual Ganjali Khan Project, an ongoing research initiative that is using 3D scanning and immersive virtual reality (VR) technologies to document a large historical landmark in the desert city of Kerman, Iran, the Ganjali Khan Complex. It describes the intellectual merits of these emerging technologies for preserving and providing new forms of access to cultural heritage sites, outlines the procedures of data collection and 3D processing, and describes the current work and next steps of the project. This paper will be of interest to scholars and institutions considering using 3D and VR technologies for supporting cultural heritage preservation, digital humanities projects, or other types of interdisciplinary research.
Post Conflict Normalization through Trade Preferential Agreements: Egypt, Israel and the Qualified Industrial Zones
Authors: Kahn Yehudith , Arieli Tamar 
Published: August 2020

Abstract
Trade and economic cooperation are often promoted through policy to facilitate post-conflict normalization. The Qualified Industrial Zone (QIZ) model of duty and quota-free industrial regions is a policy tool initiated by the United States as a brokerage in promoting peace between Israel and its Arab neighbors. Indeed, a vast literature aims to evaluate the economic and political potential of trade liberalization. Yet the mechanisms of trade policy implementation in a post-conflict environment, its timing and underlying political motives, are critical but rather neglected factors, which design the prospects of trade incentives. We therefore question the effectiveness of the QIZ as a tool addressing post-conflict dynamics and ask whether its impact on Israel–Egyptian relations reflects the value of this policy or the circumstances of its implementation. Using mixed methods, this study presents and evaluates the implementation of the QIZ in Egypt since 2004 and its results, both economic and political, fine tuning the broader debate to focus on circumstances of implementation. This case study demonstrates the results of trade opportunity implementation as a reaction to threat rather than mobilization to realize post-conflict rapprochement or even to reap economic opportunity. Notwithstanding the forces of globalization, Egypt’s pre and post-revolutionary internal political economy and delicate relations with Israel serve as the context for understanding the QIZ. This context facilitates contradicting political interpretations, with the QIZ simultaneously celebrated as an economic success, criticized as an Egyptian escape route from structural reforms, and accused as embodying a U.S.–Egyptian elite conspiracy, to coerce Egyptian economic normalization with Israel.
COVID-19 in Africa: Turning a Health Crisis into a Human Security Threat?
Authors: Haer Roos , Demarest Leila 
Published: August 2020

Abstract
While the number of African COVID-19 cases is relatively limited for now, the pandemic and the restrictive measures to curtail the virus might have important implications for the level of human security. They may give rise to economic decline and rising poverty, authoritarianism, urban violence, and increasing social inequalities. In this proceeding, we will outline the mechanisms through which these consequences may take hold in Africa.
COVID-19 as a Potential Accelerator. A Euro-Centric Perspective
Authors: Kollias Christos , Zouboulakis Michel 
Published: August 2020

Abstract
In the words of the IMF, the economic consequences of the COVID-19 pandemic have generated “a crisis like no other”. Economic shocks often result in social and political quivers within states but also affect relations between states. In the short conceptual note that follows, we concentrate on the European Union and we explore the possible effects the COVID-19 economic fallout will have on its already strained cohesion. We argue that it has the potential to act as an accelerator towards greater European integration.
The effect of guide vane type on performance of multistage energy recovery hydraulic turbine (MERHT)
Authors: Tian Yabin , Hu Anjie , Zheng Qi 
Published: August 2020

AbstractIn this work, we theoretically analyzed the main factors affecting performance of multistage energy recovery hydraulic turbine (MERHT), and found that the arc radius (r) of the edge at the outlet section of the runner guide vane is the determining factor of the hydraulic efficiency of hydraulic turbines. To further improve the performance of the MERHT, a numerical model is then proposed to optimize the arc radius. The MERHT-type DCSGT250-175 × 9 was taken in the simulation. The hydraulic efficiency ηh and the corresponding distributions of pressure and velocity were numerically studied with four different values of r ranging from 133.5 to 138 mm. It is found that the flow state and the flow field distribution were the best when r equals to 134 mm. With the optimum r, the external diameter of the runner guide vane (D) was further adjusted, which can lead to 3.9% increase of average efficiency according to the simulation results.
Mathematical analysis of a non-Newtonian polymer in the forward roll coating process
Authors: Zahid Muhammad , Zafar Muhammad , Rana Muhammad A. , Lodhi Muhammad S. , Awan Abdul S. , Ahmad Babar 
Published: August 2020

Abstract
This article describes the development of a mathematical model of forward roll coating of a thin film of a non-Newtonian material when it passes through a small gap between the two counter-rotating rolls. The conservation equations of mass, momentum, and energy in the light of LAT (lubrication approximation theory) are non-dimensionalized and solutions for the velocity profile, flow rate, pressure distribution, pressure, forces, stresses, power input to the roller, and temperature distribution are calculated analytically. It is found that by changing (increasing/decreasing) the value of material parameters, one can really control the engineering parameters like, stress and the most important the coating thickness and is a quick reference for the engineer working in coating industries. Some results are shown graphically. From the present study, it has been established that the material parameter is a device to control flow rate, coating thickness, separation points, and pressure distribution.
Synthesis of Ag@PANI nanocomposites by complexation method and their application as label-free chemo-probe for detection of mercury ions
Authors: Singh Lovepreet , Singh Vishal 
Published: August 2020

Abstract
A novel optical probe consistinsg of Ag@PANI (silver-polyaniline) nanocomposites was developed for detection of mercury ions (Hg2+). The poly-dispersed Ag@PANI nanocomposites were synthesized by complexation reaction method. We studied structural and functional properties of polymer nanocomposites thoroughly. Ag@PANI nanocomposites consist of fibrous morphology with a mean particle size of 31.39 nm. Ag@PANI nanocomposites consist of face-centered cubic crystal structure with an average crystallite size of 19.41 nm. Raman spectroscopy was used in sensitive and selective detection of Hg2+ ions in dynamic range of 0.01–0.1 ppm with limit of detection of 0.019 ppm. Ag@PANI nanocomposite sensor for Hg (II) ions has shown some sublime results in pH range 3–5. Ag@PANI-based sensing probe can be beneficial for Hg2+ ions detection in highly sensitive biological, chemical and environmental analysis. Our sensing probe has shown good reproducibility, and all recorded observations revealed that sensing probe consisting of Ag@PANI nanocomposites is well suited for detection of Hg2+ ions.
Star-shaped arylacetylene resins derived from silicon
Authors: Dai Niping , Tang Junkun , Ma Manping , Liu Xiaotian , Li Chuan , Huang Farong 
Published: August 2020

Abstract
Star-shaped arylacetylene resins, tris(3-ethynyl-phenylethynyl)methylsilane, tris(3-ethynyl-phenylethynyl) phenylsilane, and tris (3-ethynyl-phenylethynyl) silane (TEPHS), were synthesized through Grignard reaction between 1,3-diethynylbenzene and three types of trichlorinated silanes. The chemical structures and properties of the resins were characterized by means of nuclear magnetic resonance, fourier-transform infrared spectroscopy, Haake torque rheomoter, differential scanning calorimetry, dynamic mechanical analysis, mechanical test, and thermogravimetric analysis. The results show that the melt viscosity at 120 °C is lower than 150 mPa⋅s, and the processing windows are as wide as 60 °C for the resins. The resins cure at the temperature as low as 150 °C. The good processabilities make the resins to be suitable for resin transfer molding. The cured resins exhibit high flexural modulus and excellent heat-resistance. The flexural modulus of the cured TEPHS at room temperature arrives at as high as 10.9 GPa. Its temperature of 5% weight loss (T
d5) is up to 697 °C in nitrogen. The resins show the potential for application in fiber-reinforced composites as high-performance resin in the field of aviation and aerospace.
Slotted bone point from Tłokowo – rewritten story of a unique artefact from Mesolithic Poland
Authors: Osipowicz Grzegorz , Orłowska Justyna , Bosiak Mariusz , Manninen Mikael A. , Targowski Piotr , Sobieraj Jarosław 
Published: August 2020

Abstract
The article describes the results of the interdisciplinary studies of a unique bone slotted point from Tłokowo, north-eastern Poland. The artefact was discovered in 1989, and indirect dating suggested an Early Mesolithic date. In this article we present the results of direct radiocarbon dating of the point, which shows that it is almost 2000 years younger than previously suggested. In addition, physical-chemical studies of the adhesive used to mount the flint inserts inside the point were conducted. The results of gas chromatography mass spectrometry (GC-MS) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FT-IR) analysis indicate that the adhesive is birch tar. Finally, the article presents the results of detailed traceological studies that allow interpretation of the technology of production and possible function of the point. For the analysis, as well as various types of microscopes, optical coherence tomography (OCT) was used. In the discussion the results of all the analyses are considered alongside our current knowledge of this type of Mesolithic points in Europe.
Simultaneous enhancement of strength and ductility with nano dispersoids in nano and ultrafine grain metals: a brief review
Authors: Hu Yusheng , Yu Ziyun , Fan Genlian , Tan Zhanqiu , Zhou Jiandang , Zhang Hao , Li Zhiqiang , Zhang Di 
Published: August 2020

AbstractGrain refinement is the most universal and effective method of strengthening metallic materials, which is known as the “Hall-Petch” relationship. However, when grain size is refined to sub-micro regime (Ultrafine Grain, UFG) or even nano regime (Nano Grain, NG), the plasticity of metallic materials becomes poor. Massive studies indicate that the low strain hardening ability resulted from the enhanced dynamic recovery and lack of dislocation accumulation in fine grains is the main reason for low ductility in UFG/NG metals. To resolve this “strength-ductility” conflict, different strategies have been taken, like bimodal/multimodal structure, nanotwins, gradient structure and intragranular nano dispersoids. Among them, the introduction of nano dispersoids into the fine grains attracted lots of attention due to its wide applicability and great success in simultaneously increasing the strength and ductility of the UFG/NG metal. In addition to the enhanced mechanical performance, the introduced second-phase particle may also bring some extraordinary functional properties into the metallic material. In this paper, a brief view of the strategies to improve ductility of the UFG/NG metals and the relevant toughening mechanisms are revealed. Special attentions are paid to the utilization of intragranular nano dispersoids in Aluminum alloys.
Coastline extraction and land use change analysis using remote sensing (RS) and geographic information system (GIS) technology – A review of the literature
Authors: Yasir Muhammad , Hui Sheng , Binghu Huang , Rahman Sami Ur 
Published: August 2020

Abstract
Coastlines mapping techniques or the coastline automated analyses have been sought after. In practice, various sorts of seacoasts, for example, biological, silty, arenaceous, artificial, and bedrock coasts, have their own attributes, which force various degrees of intricacy on coastline mapping. As an extraordinary kind of complex artificial coast, aquaculture coast is shaped by the farming of aquatic organisms on silt tidal flats. With the rapid growth of coastal aquaculture in recent years, aquaculture coasts have increased in some developing countries. It has been estimated that aquaculture coasts constitute about 30% of all coastlines in mainland China. In order to identify, monitor, model, and manage the vast expanse of coastal aquaculture, effective methods of extracting aquaculture coastlines from remotely sensed imagery are desired. Secondly, with the rapid economic development in coastal areas, the development of coastal zone resources is also increasing day by day, which benefits the development of island coastal zone. Using oneself has become an important link in the development of marine economy. Due to the limited coastal resources and low environmental carrying capacity, the overexploitation and utilization of coastal resources will lead to a series of problems, such as coastal erosion, coastal migration and accumulation, island area reduction, etc., Both man-made activities and natural factors will lead to coastline changes, which will lead to corresponding changes in coastal ecological environment, thus affecting the coordinated development of coastal economy and the survival of coastal residents. Therefore, efficient, accurate and timely acquisition of coastline information and research on the spatial-temporal changes of coastline are of great significance to the protection of the living environment of coastal residents, the effective development of island and coastal resources, the coordination of sustainable economic development in coastal areas and the mitigation of marine disasters. This paper presents a review of those papers reporting coastline extraction and land use and land cover (LULC) change analysis using remote sensing (RS) and geographic information system (GIS) technology.
Organotellurium compounds: an overview of synthetic methodologies
Authors: Irfan Muhammad , Rehman Rabia , Razali Mohd. R. , Shafiq-Ur-Rehman  , Ateeq-Ur-Rehman  , Iqbal Muhammad Adnan 
Published: August 2020

Abstract
In wake of emerging applications of organotellurium compounds in biological and material science avenues, the current review describes their key synthetic methodologies while focusing the synthesis of organotellurium compounds through five ligand-to-metal linkages including carbon; carbon-oxygen; carbon-nitrogen; carbon-metal; carbon-sulfur to tellurium. In all of these linkages whether tellurium links with ligands through a complicated or simple pathways, it is often governed through electrophilic substitution reactions. The present study encompasses these major synthetic routes so as to acquire comprehensive understanding of synthetic organotellurium compounds.
Multi-physics flux coupling for hydraulic fracturing modelling within INMOST platform
Authors: Terekhov Kirill M. 
Published: August 2020

AbstractThis work presents an overview of techniques that enable the construction of collocated finite volume method for complex multi-physics models in multiple domains. Each domain is characterized by the properties of heterogeneous media and features a distinctive multi-physics model. Coupling together systems of equations, corresponding to multiple unknowns, results in a vector flux. The finite volume method requires continuity of intradomain and interdomain vector fluxes. The continuous flux is derived using an extension of the harmonic averaging point concept. Often, the collocated coupling of the equations results in a saddle-point problem subject to inf-sup stability issues. These issues are addressed by the eigen-splitting of indefinite matrix coefficients encountered in the flux expression. The application of the techniques implemented within INMOST platform to hydraulic fracturing problem is demonstrated.
Tensor decompositions and rank increment conjecture
Authors: Tyrtyshnikov Eugene E. 
Published: August 2020

AbstractSome properties of tensor ranks and the non-closeness issue of sets with given restrictions on the rank of tensors entering those sets are studied. It is proved that the rank of the d-dimensional Laplacian equals d. The following conjecture is formulated: for any tensor of non-maximal rank there exists a nonzero decomposable tensor (tensor of rank 1) such that the rank increases by one after adding this tensor. In the general case, it is proved that this property holds algebraically almost everywhere for complex tensors of fixed size whose rank is strictly less than the generic rank.
A monitoring procedure for detecting structural breaks in factor copula models
Authors: Manner Hans , Stark Florian , Wied Dominik 
Published: August 2020

Abstract
We propose a new monitoring procedure based on moving sums (MOSUM) for detecting single or multiple structural breaks in factor copula models. The test compares parameter estimates from a rolling window to those from a historical data set and analyzes the behavior under the null hypothesis of no parameter change. The case of multiple breaks is also treated. In the model, the joint copula is given by the copula of random variables which arise from a factor model. This is particularly useful for analyzing high dimensional data. Parameters are estimated with the simulated method of moments (SMM). We analyze the behavior of the monitoring procedure in Monte Carlo simulations and a real data application. We consider an online procedure for predicting the day-ahead Value-at-risk based on the suggested monitoring procedure.
The Postsocialist Transformation of Youth Voluntarism in Serbia
Authors: Ljubojević Ana 
Published: August 2020

AbstractThe author analyses the transformation of youth voluntarism in Serbia on two levels: 1) institutional, i. e. by tracing the changes in organizing structures of the Young Researchers of Serbia organization from 1980 to 2000, from a coordinated network of organizations to a postsocialist civil society organization; and 2) personal, i. e. by analysing personal experiences of the volunteers in the last decade of the twentieth century. Following the methodological approach of discourse analysis, the study relies on sixteen semi-structured interviews with volunteers engaged in the first postwar and post-sanctions voluntary workcamps in Serbia and internationally, as well as with some of the leading officers from the organization and former workcamp leaders. Particular attention was paid to the period of the Yugoslav wars (1991–1999), the collaboration with the antiwar movements in the region, and the process leading to the foundation of the Southeast European Youth Network.