Survey of blockchain:principle,progress and application by Shiqin ZENG, Ru HUO, Tao HUANG, Jiang LIU, Shuo WANG, Wei FENG

“…Blockchain is a kind of distributed ledger technology that upgrades to a complete storage system by adding logic control functions such as intelligent contracts.With the changes of its classification,service mode and application requirements,the core technology forms of Blockchain show diversified development.In order to understand the Blockchain ecosystem thoroughly,a hierarchical technology architecture of Blockchain was proposed.Furthermore,each layer of blockchain was analyzed from the perspectives of basic principle,related technologies and research progress in-depth.Moreover,the technology selections and characteristics of typical Blockchain projects were summarized systematically.Finally,some application directions of blockchain frontiers,technology challenges and research prospects including Smart Cities and Industrial Internet were given.…”
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Ground Deformation Detected by Permanent Tiltmeters on Mt. Etna Summit: The August 23-26, 2018, Strombolian and Effusive Activity Case by Salvatore Gambino, Marco Aloisi, Giuseppe Di Grazia, Giuseppe Falzone, Angelo Ferro, Giuseppe Laudani

“…These changes suggest a shallow contraction source just south of the Southeast Crater. …”
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An Iterative Shrinking Projection Method for Solving Fixed Point Problems of Closed and ϕ-Quasi-Strict Pseudocontractions along with Generalized Mixed Equilibrium Problems in Banac... by Kasamsuk Ungchittrakool

“…We propose an iterative shrinking projection method for finding a common solution of generalized mixed equilibrium problems and fixed point problems of closed and ϕ-quasi-strict pseudo-contractions. Our results hold in reflexive, strictly convex, and smooth Banach spaces with the property (K). …”
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Labor Outsourcing in the Steelmaking Industry in Argentina: Companies of Ex-workers in Acindar Villa Constitución and Siderar Ensenada by María Alejandra Esponda, Julia Strada

“…Based on an interdisciplinary social anthropology, political science and political economy approach, this article reflects on the origins, trajectories, structural conditionings, and projections of these contracting businesses.…”
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Gross Fixed Capital Formation in the Euro Area During the COVID-19 Pandemic by Mirko Licchetta, Eric Meyermans

“…The empirical analysis suggests that the intensity of the lockdown measures to contain the spread of the virus and the country-specific structure of the economy along with other traditional drivers, in particular falling output, can explain a large part of the contraction. The bold policy response at the national and EU level mitigated the impact of COVID-19 and supported the recovery. …”
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Existence and Uniqueness Results for a Class of Singular Fractional Boundary Value Problems with the p-Laplacian Operator via the Upper and Lower Solutions Approach by KumSong Jong, HuiChol Choi, KyongJun Jang, SunAe Pak

“…Some fixed-point theorems such as the Leray-Schauder nonlinear alternative, the Schauder fixed-point theorem, and the Banach contraction mapping principle and the properties of the Gauss hypergeometric function are used to prove our main results. …”
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The Ace of Spades: Reverse Takotsubo Cardiomyopathy in the Context of Angiographic Embolization of Recurrent Metastatic Serotonin-Positive Neuroendocrine Tumour of the Pancreas by Ian A. Mazzetti, Michael J. Marcaccio, Odette Boutross-Tadross, Omid Salehian, Catherine Demers

“…Cardiac biomarkers were elevated, and echocardiography revealed akinesis of all basal segments with a normally contracting apex. The absence of flow-limiting coronary disease on angiography confirmed the presence of reverse Takotsubo cardiomyopathy. …”
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BARRIERS OF EXTERNAL ECONOMIC ACTIVITIES TO RUSSIAN NON-COMMODITY EXPORTS by E. A. Amiraslanova, N. Yu. Barkova, T. O. Shpunt

“…Also the classification of such “barriers of ignorance” has been developed and the measures, allowing to reduce the impact of these barriers have been proposed: creation of an electronic commercial site; creation of multifunctional centers, in which certification and licensing procedures would be carried out, customs and tax сonsultancy to potential exporters, advice and assistance in obtaining the necessary permission documentation in foreign countries; сounselling on the correct execution of foreign economic contracts to avoid double taxation and transfer pricing and other measures.…”
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Approximation for the Hierarchical Constrained Variational Inequalities over the Fixed Points of Nonexpansive Semigroups by Li-Jun Zhu

“…The purpose of the present paper is to study the hierarchical constrained variational inequalities of finding a point x* such that x*∈Ω,〈(A-γf)x*-(I-B)Sx*,x-x*〉≥0,  ∀x∈Ω, where Ω is the set of the solutions of the following variational inequality: x*∈Ϝ,〈(A-S)x*,x-x*〉≥0,  ∀x∈Ϝ, where A,B are two strongly positive bounded linear operators, f is a ρ-contraction, S is a nonexpansive mapping, and Ϝ is the fixed points set of a nonexpansive semigroup {T(s)}s≥0. …”
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Common Fixed-Point Results in Ordered Left (Right) Quasi-b-Metric Spaces and Applications by Hemant Kumar Nashine, Sourav Shil, Hiranmoy Garai, Lakshmi Kanta Dey, Vahid Parvaneh

“…We use the notions of left- and right-complete quasi-b-metric spaces and partial ordered sets to obtain a couple of common fixed-point results for strictly weakly isotone increasing mappings and relatively weakly increasing mappings, which satisfy a pair of almost generalized contractive conditions. To illustrate our results, throughout the paper, we give several relevant examples. …”
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Quelle prévention des TMS dans l’activité de l’encadrement de proximité en sous-traitance interne ? Un cas dans le secteur de la découpe de viande by Aude Cuny-Guerrier, Sandrine Caroly, Fabien Coutarel, Agnès Aublet-Cuvelier

“…These regulations concerned the management of human resources and the foreman’s participation in production activities. In this sub-contracting context, these regulations focused primarily on greater performance and, at a first glance, only indirectly on the health preservation of the butchers.…”
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Effects of Duct Cross Section Camber and Thickness on the Performance of Ducted Propulsion Systems for Aeronautical Applications by Rodolfo Bontempo, Marcello Manna

“…The axisymmetric flow field around a ducted rotor is thoroughly analysed by means of a nonlinear and semi-analytical model which is able to deal with some crucial aspects of shrouded systems like the interaction between the rotor and the duct, and the slipstream contraction and rotation. Not disregarding the more advanced CFD based methods, the proposed procedure is characterised by a very low computational cost that makes it very appealing as analysis tool in the preliminary steps of a design procedure of hierarchical type. …”
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Warp drives and Martel–Poisson charts by Abhishek Chowdhury

“…We analyse the expansion/contraction of space and the (NEC) violations associated with these warp drives and find interesting scalings due to the global imprints of the conical defects. …”
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Gestes, savoirs et normes de métier des enseignants vus par des collégiens by Marie-Sylvie Claude, Patrick Rayou

“…Taking into account, in addition to the standards of the teachers, these standards of the college students, can help to understand the joint action between teachers and pupils, and the didactic contracts which result from it…”
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From Dumas fils’s Étrangère to Wilde’s Aventurière: French Theatrical Forerunners of the Wildean Female Dandy by Ignacio Ramos Gay

“…My aim is thus twofold: first to recognize the debt British playwrights contracted towards French drama and, secondly, to state that French theatrical stereotypes, even when being the main cause of native playwrights’ drowsiness, were also the first step towards the renaissance of English drama, as it can be observed throughout Oscar Wilde’s, Pinero’s, Gilbert’s and Jones’s dramaturgies.…”
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Planning Special Events by Reba Ellen Hicks, Ricky Telg, Tracy Irani

“…After reading this publication, you will be able to explain how event sites are chosen, what criteria are used to plan events, and how to handle site permits, contracts, and budgets. You also will learn the five critical stages in planning a special event and how to evaluate an event. …”
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The Effect of Calcitonin Gene-Related Peptide (CGRP) on the Cytosolic Calcium Concentration and Force in Rat Intramural Coronary Arteries by M. Sheykhzade, N.C.B. Nyborg

“…At a steady state of contraction, the increase in [Ca2+]i induced by 300 nM U46619 (100״x 14 nM, n = 7) was similar to that induced by 36 mM K+ (98 ״x 9 nM, n = 7). …”
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Electromyographic Characteristics of a Single Motion Shoulder Exercise: A Pilot Study Investigating a Novel Shoulder Exercise by Michael J Henehan, Tamar Brand-Perez, Jeffrey C Peng, Masaaki Tsuruike

“…A single motion shoulder exercise that effectively activates the rotator cuff and scapular stabilizing muscles, engages the scapulohumeral rhythm, and includes eccentric contractions may be more effective and easier for patients to consistently perform as compared to multiple standard shoulder exercises…”
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The latest diagnostic methods for esophageal and gastric examinations. High-resolution manometry is now available in Ukraine by Yu.M. Stepanov, N.V. Prolom, S.O. Tarabarov

“…This innovative study provides an opportunity to assess in detail the functional state of the esophagus, in particular the coordination of muscle contractions during swallowing and the function of the lower esophageal sphincter. …”
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A descriptive analysis of a medical humanitarian aid initiative for quality perinatal management in war-torn Ukraine by Iryna Mogilevkina, Dmytro Dobryanskyy, Rhona MacDonald, Diane Watson, David Southall

“…After informed consent, mothers (n = 13735) who agreed to use in labour fetal self-monitoring in addition to standard intrapartum fetal health surveillance, monitored and recorded fetal heart rate changes on a “contraction-by-contraction” basis into a special form. …”
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