bluuebunny/crossref_metadata_2025 huggingface dataset:
The Burden on Cohabitants of Patients with Chronic Spontaneous Urticaria: A Cross-Sectional Study
Authors: Sánchez-Díaz Manuel , Salazar-Nievas Maria-Carmen , Molina-Leyva Alejandro , Arias-Santiago Salvador
Published: June 2022

Chronic Spontaneous Urticaria (CSU) has been associated with patients’ poor quality of life. Despite being a chronic disease that could alter the quality of life of the people who live with patients, the potential burden on their cohabitants has not been studied to date. The aim of this study is to analyze the relationship between the patient’s quality of life, disease control, disease duration and family quality of life and the cohabitant’s mood disturbances, sexual dysfunction, type D personality and sleep quality. A cross-sectional study including patients suffering from CSU and their cohabitants was performed. Sociodemographic variables and disease activity, quality of life, sleep, sexual disfunction, anxiety, depression and type D personality were collected using validated questionnaires. Sixty-two subjects, 31 CSU patients and 31 cohabitants, were included in the study. Worse disease control and poorer quality of life in patients were associated with poorer family quality of life and higher rates of anxiety among the cohabitants (p < 0.05). Patients’ poor quality of life was associated with reduced sexual satisfaction among the cohabitants (p < 0.05). Long disease duration (>10 years) was associated with an increased prevalence of type D personality among the cohabitants (prevalence ratio: 2.59, CI 95% 1.03–7.21). CSU seems to have an impact on the quality of life of cohabitants, especially in terms of increased rates of anxiety, poorer quality of life and reduced sexual satisfaction. The prolonged course of the disease could be associated with the increased presence of non-adaptative personality traits.
Fifteen-Year Differences in Indications for Cardiac Resynchronization Therapy in International Guidelines—Insights from the Heart Failure Registries of the European Society of Cardiology
Authors: Tymińska Agata , Ozierański Krzysztof , Brociek Emil , Kapłon-Cieślicka Agnieszka , Balsam Paweł , Marchel Michał , Crespo-Leiro Maria G. , Maggioni Aldo P. , Drożdż Jarosław , Opolski Grzegorz , Grabowski Marcin
Published: June 2022

Cardiac resynchronization therapy (CRT) applied to selected patients with heart failure (HF) improves their prognosis. In recent years, eligibility criteria for CRT have regularly changed. This study aimed to investigate the changes in eligibility of real-life HF patients for CRT over the past fifteen years. We reviewed European and North American guidelines from this period and applied them to HF patients from the ESC-HF Pilot and ESC-Long-Term Registries. Taking into consideration the criteria assessed in this study (including all classes of recommendations i.e., class I, IIa and IIb, as well as patients with AF and SR), the 2013 (ESC) guidelines would have qualified the most patients for CRT (266, 18.3%), while the 2015 (ESC) guidelines would have qualified the least (115, 7.9%; p-value for differences between all analyzed papers <0.0001). There were only 26 patients (1.8%) who would be eligible for CRT using the class I recommendations across all of the guidelines. These results demonstrate the variability in recommendations for CRT over the years. Moreover, this data indicates underuse of this form of pacing in HF and highlights the need for more studies in order to improve the outcomes of HF patients and further personalize their management.
How Bronchoscopic Dye Marking Can Help Minimally Invasive Lung Surgery
Authors: Sarsam Matthieu , Baste Jean-Marc , Thiberville Luc , Salaun Mathieu , Lachkar Samy
Published: June 2022

In the era of increasing availability of high-resolution chest computed tomography, the diagnosis and management of solitary pulmonary nodules (SPNs) has become a common challenging clinical problem. Meanwhile, surgical techniques have improved, and minimally invasive approaches such as robot- and video-assisted surgery are becoming standard, rendering the palpation of such lesions more difficult, not to mention pure ground-glass opacities, which cannot be felt even in open surgery. In this article, we explore the role of bronchoscopy in helping surgeons achieve successful minimally invasive resections in such cases.
Effects of Bionic Pectoral Fin Rays’ Spanwise Flexibility on Forwarding Propulsion Performance
Authors: He Junjie , Cao Yonghui , Huang Qiaogao , Pan Guang , Dong Xin , Cao Yong
Published: June 2022

Oscillating pectoral fins’ spanwise flexibility is a key factor influencing the forwarding propulsion performance of bionic cownose rays, including thrust and heave-pitch stability. This study explores the effects of the bionic pectoral fin ray’s spanwise flexibility on its propulsion performance via experiments. Inspired by the cownose ray, a pair of bionic pectoral fins with fin rays and fabric skin was designed, and two motors drive the controllable flapping motion. The bionic pectoral fins’ flexibility can be quantified by using fin rays’ bending stiffness. The experiments were carried out in a water tank to measure the thrust, the lift force, and the pitch moment of the bionic cownose ray. The fin rays are divided into plastic sheets of five thicknesses and three fin rays with more obvious stiffness variations. The movement parameters included the following: the flapping frequency of 0.3–0.7 Hz, the flapping amplitude of 20–40°, and the phase difference of 20–40°. The experimental results show that the stiffness of the bionic pectoral fin rays plays an important role in the thrust, lift force, and pitch moment. The fin rays with high stiffness root segment and low stiffness tip segment have lower lift and pitch moment while maintaining a high thrust. This shows that the pectoral fins’ flexible characteristics of the cownose ray are of great significance to the design of the bionic prototype.
Response of Size-Fractionated Chlorophyll a to Upwelling and Kuroshio in Northeastern South China Sea
Authors: Li Danyang , Yang Shuang , Wei Yuqiu , Wang Xingzhou , Mao Yingjie , Guo Congcong , Sun Jun
Published: June 2022

The variability of size-fractionated chlorophyll a (Chl a) biomass and related environmental variables was investigated in a survey conducted in the northeastern South China Sea (NESCS), to assess their responses to upwelling, Kuroshio, and nutrients in the summer of 2017. The depth-weighted total Chl a concentration varied from 0.057 to 0.496 μg/L. The contribution of size-fractionated Chl a to total Chl a biomass was determined, with the contributions of pico-Chl a (0.2–2 μm), nano-Chl a (2–20 μm), and micro-Chl a (>20 μm) found to be 52.87%, 38.54%, and 8.59%, respectively. We found that nano-Chl a contributes more to total-Chl a than pico-Chl a in areas affected by upwelling. In addition, the results indicated an upward shift in the deep chlorophyll maximum (DCM) content in the upwelling area and the Kuroshio intrusion area. The Chl a biomass was increased in the physical process. Overall, correlation analysis showed that environmental variables (temperature, salinity, phosphate, silicate, nitrate, nitrite, ammonium) significantly influenced the phytoplankton biomass. However, physical processes determined the changes in environmental variables, with upwelling and Kuroshio being the main factors regulating the distribution of Chl a.
Increased Orbital Muscle Fraction Diagnosed by Semi-Automatic Volumetry: A Risk Factor for Severe Visual Impairment with Excellent Response to Surgical Decompression in Graves’ Orbitopathy
Authors: Steiert Christine , Kuechlin Sebastian , Masalha Waseem , Beck Juergen , Lagrèze Wolf Alexander , Grauvogel Juergen
Published: June 2022

Graves’ orbitopathy (GO) leads to increased orbital tissue and causes symptoms such as exophthalmos, functional complaints, or dysthyroid optic neuropathy. Different GO types with fat and/or muscle enlargement were identified, and increased muscle appears to particularly influence visual status and treatment response. The current study examines visual parameters dependent on orbital muscle volume fraction in a surgically treated GO cohort. After volumetric analysis of the preoperative orbital content, 83 orbits in 47 patients were categorized into predefined groups (increased or not-increased muscle fraction). All cases underwent pterional orbital decompression, and pre- and postoperative visual status was retrospectively analyzed. Forty-one orbits revealed increased and 42 orbits revealed not-increased muscle volume (mean fraction 29.63% versus (vs.) 15.60%). The preoperative visual acuity (VA) was significantly lower in orbits with increased vs. not-increased muscle volume (mean VA 0.30 vs. 0.53, difference 2.5 lines). After surgery, mean VA improved significantly by 1.7 lines in orbits with increased muscle volume. Not preoperative, but postoperative exophthalmos was significantly lower in orbits with not-increased muscle volume. Increased orbital muscle is associated with significantly reduced VA, but can be remarkably improved by pterional orbital decompression. Therefore, surgical therapy should be considered particularly in decreased VA with orbital muscle enlargement.
Seeking Sustainable Solutions in a Time of Change
Authors: Beltrán Juan F. , Litvaitis John A. , Abellán Pedro
Published: June 2022

Global change is impacting our lives in many ways [...]
How Do the New Residential Areas in Bucharest Satisfy Population Demands, and Where Do They Fall Short?
Authors: Preda Mihaela , Vijulie Iuliana , Lequeux-Dincă Ana-Irina , Jurchescu Marta , Mareci Alina , Preda Alexandru
Published: June 2022

In recent years, Bucharest’s residential dynamics have thrived, fueled by growing demand and an insufficient housing fund. This study aimed to analyze the residential satisfaction of those living in newly built dwellings. Its objectives were to identify the characteristics of three new residential areas and analyze the satisfaction level among residents regarding both their dwellings and neighborhoods. The investigation employed direct observations during the fieldwork phase (through observation sheets and mapping methods) and surveys (through questionnaires with residents and interviews with developers). Its results highlighted spaces that exhibit an increase in residential constructions, with a tendency to expand toward suburban areas, without necessarily meeting legislative requirements. When measuring the population’s residential satisfaction level, the study observed a general satisfaction regarding dwellings’ modernity and price but noticeable differences within the sample residential nuclei. The solutions proposed by residents mainly target authorities, who were held responsible for developing the urban infrastructure prior to granting building permits, as well as for vetting developers better and requiring them to respect the legislation. Hence, scientists, local authorities, real-estate developers and the local population represent the beneficiaries of the current study’s results.
What Heritage Bilinguals Tell Us about the Language of Emotion
Authors: Vargas Fuentes Nicole A. , Kroll Judith F. , Torres Julio
Published: June 2022

Variation in the language experience of bilinguals has consequences for cognitive and affective processes. In the current study, we examined how bilingual experience influences the relationship between language and emotion in English among a group of Spanish–English heritage bilinguals on an emotion–memory task. Participants rated the emotionality of English taboo, negative and neutral words and then completed an unexpected recognition test. To account for language experience, data were gathered on the participants’ language dominance and proficiency. Results showed emotion–memory effects in the Spanish–English heritage bilinguals’ English (the societal language): taboo words were recognized significantly better than neutral words, while the emotionality of negative words carried over and significantly affected the recognition of preceding neutral words. Furthermore, such effects were modulated by language dominance scores with more pronounced emotion–memory effects in more English-dominant bilinguals. The findings contribute to a growing body of evidence showing that emotions are not necessarily restricted to the first acquired home language. Critically, for heritage speakers, there is often a shift in language dominance from the home language to the societal language. The present study demonstrates that the effects of emotion on memory are seen in the acquired societal language.
PRESENTATION of SPECIAL ISSUE: Variation and Change in Language Norms in Languages
Authors: Amorós-Negre Carla , Costa-Carreras Joan
Published: June 2022

This Special Issue (SI) sheds light on the relationship between geographical, sociocultural, historical, functional, or stylistic variation and language norms, understanding by these both objective implicit social habits and prescriptive explicit codifications [...]
Shape Deformation, Budding and Division of Giant Vesicles and Artificial Cells: A Review
Authors: Miele Ylenia , Holló Gábor , Lagzi István , Rossi Federico
Published: June 2022

The understanding of the shape-change dynamics leading to the budding and division of artificial cells has gained much attention in the past few decades due to an increased interest in designing stimuli-responsive synthetic systems and minimal models of biological self-reproduction. In this respect, membranes and their composition play a fundamental role in many aspects related to the stability of the vesicles: permeability, elasticity, rigidity, tunability and response to external changes. In this review, we summarise recent experimental and theoretical work dealing with shape deformation and division of (giant) vesicles made of phospholipids and/or fatty acids membranes. Following a classic approach, we divide the strategies used to destabilise the membranes into two different types, physical (osmotic stress, temperature and light) and chemical (addition of amphiphiles, the addition of reactive molecules and pH changes) even though they often act in synergy when leading to a complete division process. Finally, we review the most important theoretical methods employed to describe the equilibrium shapes of giant vesicles and how they provide ways to explain and control the morphological changes leading from one equilibrium structure to another.
Structural Analysis of Human Fascin-1: Essential Protein for Actin Filaments Bundling
Authors: Chung Jeong Min , Sato Osamu , Ikebe Reiko , Lee Sangmin , Ikebe Mitsuo , Jung Hyun Suk
Published: June 2022

Fascin, a major actin cross-linking protein, is expressed in most vertebrate epithelial tissues. It organizes actin filaments into well-ordered bundles that are responsible for the extension of dynamic membrane protrusions, including microspikes, filopodia, and invadopodia from cell surfaces, which are involved in cell migration and invasion as critical components of cancer metastasis. However, it is not well-understood how fascin-1 induces actin binding/bundling and where fascin-1 localizes along the actin filaments, thus facilitating actin bundle formation. In the present study, we attempted to clarify these problems by using biochemical and electron microscopic analyses using various fascin-1 constructs. Three dimensional structures of actin/fascin-1 complex were obtained by electron microscopy (EM) with iterative helical real-space reconstruction (IHRSR) and tomography. We revealed that the N-terminal region containing the Actin-Binding Site 2 (ABS2) of fascin-1 is responsible for actin bundling and the C-terminal region is important for the dimerization of fascin-1. We also found that the dimerization of fascin-1 through intermolecular interactions of the C-terminal region is essential for actin bundling. Since fascin is an important factor in cancer development, it is expected that the findings of present study will provide useful information for development of therapeutic strategies for cancer.
Molecular and Biochemical Mechanisms of Elicitors in Pest Resistance
Authors: Malook Saif ul , Maqbool Saiqa , Hafeez Muhammad , Karunarathna Samantha Chandranath , Suwannarach Nakarin
Published: June 2022

Insect herbivores have a variety of life cycles and feeding habits, making them extremely diverse. With their host plants, they form close relationships and suppress their defense mechanisms. Molecular elicitors are the key bio-elements in the detection and recognition of attacking enemies in tissue consumption. Insect oral secretion, frass, and fluid of egg deposition contain biologically active molecules called herbivore-associated elicitors (HAEs) that are recognized by pattern-recognition receptors (PRRs). Many plants distinguish insect feeding from wounding by HAEs present in their oral secretions (OS) and induce local and/or systemic responses against arthropod feeding. PRRs perceive HAEs in the oral secretion of caterpillars in a species-specific manner to elicit exclusive defense responses. HAEs-PRRs interactions induce plant resistance by reprogramming plant metabolism and transcriptional machinery. Quantitative, timely, and coordinated plant response initiate early signaling events, including Ca2+, reactive oxygen species (ROS), and mitogen-activated protein kinases (MAPKs). However, in insect herbivory, little is known about the molecular basis of signal transduction and regulation of plant resistance. We discuss here how early signaling cascades converge into the accumulation of phytohormones that regulate downstream special metabolites against herbivores. In this review, we propose a hypothetical model of PPRs-HAEs-mediated-induced responses in plants and discuss how PRRs-HAEs interactions elicit short- and long-term induced defenses in plants. The understanding of PRRs-HAEs interactions will help to explore the fundamental molecular mechanisms of host manipulation and may generate prospects to develop novel pest-resistance strategies.
Comparative Characteristics and Pathogenic Potential of Escherichia coli Isolates Originating from Poultry Farms, Retail Meat, and Human Urinary Tract Infection
Authors: Sarowska Jolanta , Olszak Tomasz , Jama-Kmiecik Agnieszka , Frej-Madrzak Magdalena , Futoma-Koloch Bozena , Gawel Andrzej , Drulis-Kawa Zuzanna , Choroszy-Krol Irena
Published: June 2022

The pathogenicity of many bacterial strains is determined by the acquisition of virulence genes and depends on many factors. The aim of this study was to analyse the phylogenetic background, virulence patterns, and drug susceptibility of 132 E. coli isolates tested in the context of the ExPEC (Extraintestinal Pathogenic E. coli) pathotype and the correlation of these features with bacterial isolation source: food (retail meat), poultry farms (AFEC—Avian Faecal E. coli), and patients with UTI (urinary tract infection) symptoms. The drug-susceptibility results of tested E. coli isolates obtained indicate that the resistance profile—ampicillin/tetracycline/trimethoprim+sulfamethoxazole/ciprofloxacin (AMP/TE/SXT/CIP)—was most frequently observed. The multidrug resistance (MDR) phenotype was found in 31.8% of isolates from poultry farms, 36.8% of strains isolated from food, and 20% of clinical samples. The greatest similarity of virulence profiles applied to isolates derived from poultry farms and food. Most of the AFEC from poultry farms and food-derived isolates belonged to commensals from phylogroups A and B1, while among the isolates from patients with UTI symptoms, the most common was the B2 phylogroup. The collective analysis showed similarity of the three studied groups of E. coli isolates in terms of the presented patterns of antimicrobial resistance, while the virulence profiles of the isolates studied showed great diversity. The phylogroup analysis showed no similarity between the poultry/food isolates and the UTI isolates, which had significant pathogenic potential.
Tribological Characteristics of Nano-Lubricated High-Speed Rolling Bearings Considering Interaction between Nanoparticles and Rough Surface
Authors: Tang Xiaojie , Li Junning
Published: June 2022

The embedding situation between various nanoparticles and rough surfaces affects the lubrication characteristics of rolling bearings. If not properly handled, this can easily lead to wear damage of rolling bearings. Therefore, the friction and wear mechanism of nano-lubricated high-speed rolling bearings under various nanoparticle embedded states is studied in this manuscript. Mixed oils containing different sized SiO2 nanoparticles and dispersants are prepared, and then the tribology test of nano-lubricated high-speed rolling bearings considering the interaction between various nanoparticles and the rough surfaces is conducted. The friction and wear properties such as coefficient of friction, wear volume and real-time temperature rise of high-speed rolling bearings under different embedding conditions are revealed, and the anti-wear mechanism of the nano-lubricated high-speed rolling bearings is obtained. The results show that compared to the complete non-embedded state, the complete embedded state of different nanoparticles effectively improves the anti-wear effect of the bearing. When the nanoparticle mixed oil is added, the bearing still has good anti-wear performance under the conditions of high speed and lack of oil. As for the light loaded rolling bearing adopted with nano-mixed oil, the coefficient of friction is appropriately increased, as well as the skid reduced, while the wear of the rolling bearing is effectively reduced. This research will provide theoretical basis and important reference for nano-lubrication and its application in aviation rolling bearings.
In-Plane Seismic Strengthening of Brick Masonry Using Steel and Plastic Meshes
Authors: Ullah Safi , Farooq Syed , Usman Muhammad , Ullah Burhan , Hussain Manzoor , Hanif Asad
Published: June 2022

Unreinforced masonry structures are vulnerable to seismic loading due to their brittle behavior, and must therefore be strengthened. This paper presents the seismic performance of brick masonry strengthened with steel and plastic meshes. For this purpose, twenty masonry wallets of (600 × 600 × 113 mm) were constructed, keeping the same materials and workmanship. Fifteen of them were reinforced using steel and plastic meshes. These specimens were tested for in-plane static cyclic diagonal tension (shear) behavior. The critical parameters, such as shear stress, strain, failure modes, ductility, energy dissipation, and stiffness degradation were investigated. Compared to reference and plastic-reinforced specimens, the steel-reinforced samples were found to be highly effective. Furthermore, the recommended category of steel increased the shear capacity, energy dissipation, and ductility ratio by 1.3, 14, and 6.3 times, respectively.
Influence of Build Angle and Polishing Roughness on Corrosion Resistance of 316L Stainless Steel Fabricated by SLM Method
Authors: Wang Hao , Shu Xiaoyong , Zhao Jianping
Published: June 2022

Metal parts formed by laser additive manufacturing methods usually have large surface roughness, which affects the corrosion resistance of the parts. This study reported the reason for and mechanism of the large surface roughness of 316L stainless steel samples manufactured by selective laser melting (SLM) at different build angles. Through the study, the reason for the large top surface roughness (average surface roughness is 15.3 μm) is due to the molten channel structure formed on the surface. The large side surface roughness (average surface roughness is 19.1 μm) is due to the incomplete fused particles adhering to the surface. Through electrochemical experiments, the influence of the build angle and polishing treatment on the corrosion resistance of the sample was studied. The different roughness of the top and side surfaces results in different corrosion resistances (the top surface pitting potential is 0.317 VAg/AgCl and the side surface pitting potential is 0.148 VAg/AgCl), and polishing can improve the surface corrosion resistance of specimens by reducing the surface roughness, especially for the side surface (from 0.148 to 0.351 VAg/AgCl). Therefore, parts manufactured by SLM can be post-treated to reduce roughness and improve surface corrosion resistance.
An Accuracy Comparison of Micromechanics Models of Particulate Composites against Microstructure-Free Finite Element Modeling
Authors: Luo Yunhua
Published: June 2022

Micromechanics models of composite materials are preferred in the analysis and design of composites for their high computational efficiency. However, the accuracy of the micromechanics models varies widely, depending on the volume fraction of inclusions and the contrast of phase properties, which have not been thoroughly studied, primarily due to the lack of complete and representative experimental data. The recently developed microstructure-free finite element modeling (MF-FEM) is based on the fact that, for a particulate-reinforced composite, if the characteristic size of the inclusions is much smaller than the composite representative volume element (RVE), the elastic properties of the RVE are independent of inclusion shape and size. MF-FEM has a number of advantages over the conventional microstructure-based finite element modeling. MF-FEM predictions have good to excellent agreement with the reported experiment results. In this study, predictions produced by MF-FEM are used in replace of experimental data to compare the accuracy of selected micromechanics models of particulate composites. The results indicate that, only if both the contrasts in phase Young’s moduli and phase Poisson’s ratios are small, the micromechanics models are able to produce accurate predictions. In other cases, they are more or less inaccurate. This study may serve as a guide for the appropriate use of the micromechanics models.
Compressive and Thermal Properties of Non-Structural Lightweight Concrete Containing Industrial Byproduct Aggregates
Authors: Farina Ilenia , Moccia Ivan , Salzano Cinzia , Singh Narinder , Sadrolodabaee Payam , Colangelo Francesco
Published: June 2022

This study aimed to investigate the recycling opportunities for industrial byproducts and their contribution to innovative concrete manufacturing processes. The attention was mainly focused on municipal solid waste incineration fly ash (MSWI-FA) and its employment, after a washing pre-treatment, as the main component in artificially manufactured aggregates containing cement and ground granulated blast furnace slag (GGBFS) in different percentages. The produced aggregates were used to produce lightweight concrete (LWC) containing both artificial aggregates only and artificial aggregates mixed with a relatively small percentage of recycled polyethylene terephthalate (PET) in the sand form. Thereby, the possibility of producing concrete with good mechanical properties and enhanced thermal properties was investigated through effective PET reuse with beneficial impacts on the thermal insulation of structures. Based on the obtained results, the samples containing artificial aggregates had lower compressive strength (up to 30%) but better thermal performance (up to 25%) with respect to the reference sample made from natural aggregates. Moreover, substituting 10% of recycled aggregates with PET led to a greater reduction in resistance while improving the thermal conductivity. This type of concrete could improve the economic and environmental aspects by incorporating industrial wastes—mainly fly ash—thereby lowering the use of cement, which would lead to a reduction in CO2 emissions.
Modeling Dynamic Recrystallization Behavior in a Novel HIPed P/M Superalloy during High-Temperature Deformation
Authors: Yang Qiu-Mei , Lin Yong-Cheng , Chen Ming-Song , Chen Zi-Jian
Published: June 2022

The dynamic recrystallization (DRX) features and the evolution of the microstructure of a new hot isostatic pressed (HIPed) powder metallurgy (P/M) superalloy are investigated by hot-compression tests. The sensitivity of grain dimension and DRX behavior to deformation parameters is analyzed. The results reveal that the DRX features and grain-growth behavior are significantly affected by deformation conditions. The DRX process is promoted with a raised temperature/true strain or a reduced strain rate. However, the grains grow up rapidly at relatively high temperatures. At strain rates of o.1 s−1 and 1 s−1, a uniform microstructure and small grains are obtained. Due to the obvious differences in the DRX rate at various temperatures, the piecewise DRX kinetics equations are proposed to predict the DRX behavior. At the same time, a mathematical model for predicting the grain dimension and the grain growth behavior is established. To further analyze the DRX behavior and the changes in grain dimension, the hot deformation process is simulated. The developed grain-growth equation as well as the piecewise DRX kinetics equations are integrated into DEFORM software. The simulated DRX features are consistent with the test results, indicating that the proposed DRX kinetics equations and the established grain-growth model can be well used for describing the microstructure evolution. So, they are very useful for the practical hot forming of P/M superalloy parts.
Relevant Aspects of Titanium and Zirconia Dental Implants for Their Fatigue and Osseointegration Behaviors
Authors: Aragoneses Javier , Valverde Nansi Lopez , Fernandez-Dominguez Manuel , Mena-Alvarez Jesús , Rodriguez Cinthia , Gil Javier , Aragoneses Juan Manuel
Published: June 2022

Osseointegration capacity and good mechanical behavior are key to the success of the dental implant. In many investigations, comparisons of properties are made using different dental implant designs and therefore the results can be influenced by the macrodesign of the dental implant. In this work, studies were carried out with the same dental implant model using different roughness and different materials—commercially pure titanium (grade 4) and zirconia. For this purpose, 80 smooth passivated titanium (Ti), 80 smooth zirconia (ZrO2), and 80 rough passivated titanium (Ti-R) dental implants were used. The samples were characterized by their roughness, wettability, surface energy, residual stresses, and fatigue behavior. The implants were implanted in minipigs for 4 and 12 weeks. The animals were sacrificed, and histological studies were carried out to determine the osseointegration parameters for each of the implantation times. Ti and ZrO2 dental implants have very similar wettability and surface energy properties. However, the roughness causes a decrease in the hydrophilic character and a decrease of the total surface energy and especially the dispersive component, while the polar component is higher. Due to the compressive residual stresses of alumina sandblasting, the rough dental implant has the best fatigue behavior, followed by Ti and due to the lack of toughness and rapid crack propagation the ZrO2 implants have the worst fatigue behavior. The bone index contact (BIC) values for 4 weeks were around 25% for Ti, 32% for ZrO2, and 45% for Ti-R. After 12 weeks the Ti dental implants increased to 42%, for Ti, 43% for ZrO2, and an important increase to 76% was observed for Ti-R implants. In vivo results showed that the key factor that improves osseointegration is roughness. There was no significant difference between ZrO2 and Ti implants without sandblasting.
Vibration Characteristics of the Dual Electric Propulsion System of Vessels under Electromechanical Coupling Excitation
Authors: Han Lin , Wang Dianrui , Yang Fuchun , He Weikai
Published: June 2022

An electromechanical coupling driving system is a commonly used system for large overloading ships. In this paper, a dual input electromechanical coupling model, including an inverter power supply, three-phase induction motor, fixed-axis gear, and load, is established. The influences of the gear error, inverter, and coupling stiffness on the vibration characteristics of the system are studied, and the influences of each parameter on the vibration characteristics are analyzed. The inverter power supply part considers the constant voltage–frequency ratio control and sinusoidal pulse width modulation, as well as the inverter. The motor part uses the dynamic motor model based on the equivalent circuit. The fixed-axis gear section uses a translation–torsion model with time-varying mesh stiffness and damping. The mechanical part and the motor part are coupled with the load torque of the motor. The results show that the greater the error of the gear, the greater the vibration of the system, and the rotation frequency error is the main factor. Secondly, by comparing the influence of error value and accuracy difference on vibration, we found that when an accuracy difference exists, the dominant factor of system vibration is the accuracy difference. Thirdly, the use of an inverter also increases the vibration of the electromechanical coupling system. Finally, we found that the lower stiffness of the elastic coupling reduced the vibration of the system.
Kinematic and Dynamic Modeling and Workspace Analysis of a Suspended Cable-Driven Parallel Robot for Schönflies Motions
Authors: Wang Ruobing , Xie Yanlin , Chen Xigang , Li Yangmin
Published: June 2022

In recent years, cable-driven parallel robots (CDPRs) have drawn more and more attention due to the properties of large workspace, large payload capacity, and ease of reconfiguration. In this paper, we present a kinematic and dynamic modeling and workspace analysis for a novel suspended CDPR which generates Schönflies motions. Firstly, the architecture of the robot is introduced, and the inverse and forward kinematic problems of the robot are solved through a geometrical approach. Then, the dynamic equation of the robot is derived by separately considering the moving platform and the drive trains. Based on the dynamic equation, the dynamic feasible workspace of the robot is determined under different values of accelerations. Finally, experiments are performed on a prototype of the robot to demonstrate the correctness of the derived models and workspace.
Magnetohydrodynamic Effects on Third-Grade Fluid Flow and Heat Transfer with Darcy–Forchheimer Law over an Inclined Exponentially Stretching Sheet Embedded in a Porous Medium
Authors: Abbas Amir , Jeelani Mdi Begum , Alharthi Nadiyah Hussain
Published: June 2022

The major aim of the current investigations is to study the magnetohydrodynamic effects on heat and mass transfer phenomena in third-grade fluid past an inclined exponentially stretching sheet fixed in a porous medium with Darcy–Forchheimer law influence. The constitutive equations compatible for heat and mass transportation in third-grade fluid in terms of partial differential equations are modeled. These partial differential equations are then converted to ordinary differential equations by using suitable similarity variables formulation. The transformed flow model is solved by using MATLAB built-in numerical solver bvp4c. Effects of pertinent parameters on physical properties that are velocity field, temperature field and mass concentration along with skin friction coefficient, Nusselt number and Sherwood number are demonstrated in graphs and tables. The impact of dimensionless numbers on the physical properties is analyzed and discussed with a physical view point at angle  α=π/6 (inclined sheet). It is seen that as the third-grade fluid parameter (0.1≤β≤11) is increased, the velocity profile increases, but the temperature field and mass concentration are decreased. It is observed that as the permeability parameter (1≤K*≤11) is raised, the velocity distribution decreases and mass concentration increases. It is concluded from the results that owing to an increase in the local inertial coefficient (0.1≤Fr≤5), the velocity profile reduces but an increment in mass concentration is noted. It is concluded that by increasing values of magnetic field parameter (0.1≤M≤10) the velocity field is delineated and temperature field is elevated exactly according to the physics of magnetic field parameters. The present results are compared with already published results and it is observed that there is good agreement between them. This good agreement ensures the validation of accuracy of the results.
Estimation of Error Variance in Regularized Regression Models via Adaptive Lasso
Authors: Wang Xin , Kong Lingchen , Wang Liqun
Published: June 2022

Estimation of error variance in a regression model is a fundamental problem in statistical modeling and inference. In high-dimensional linear models, variance estimation is a difficult problem, due to the issue of model selection. In this paper, we propose a novel approach for variance estimation that combines the reparameterization technique and the adaptive lasso, which is called the natural adaptive lasso. This method can, simultaneously, select and estimate the regression and variance parameters. Moreover, we show that the natural adaptive lasso, for regression parameters, is equivalent to the adaptive lasso. We establish the asymptotic properties of the natural adaptive lasso, for regression parameters, and derive the mean squared error bound for the variance estimator. Our theoretical results show that under appropriate regularity conditions, the natural adaptive lasso for error variance is closer to the so-called oracle estimator than some other existing methods. Finally, Monte Carlo simulations are presented, to demonstrate the superiority of the proposed method.
Synergetic Insulation and Induction Effects Selectively Optimize Multiresonance Thermally Activated Delayed Fluorescence
Authors: Bian Jinkun , Chen Su , Qiu Lili , Zhang Nan , Zhang Jing , Duan Chunbo , Han Chunmiao , Xu Hui
Published: June 2022

Multiresonance (MR) emitters featuring narrowband emissions and theoretically 100% exciton harvesting are great potential for organic light-emitting diode (OLED) applications. However, how to functionalize MR molecules without scarifying emission color purity is still a key challenge. Herein, we report a feasible strategy for selective optimization of MR molecules, which is demonstrated by a blue MR emitter
tCBNDASPO
substituted with a diphenylphosphine oxide (DPPO) group. Compared to its DPPO-free parent molecule,
tCBNDASPO
preserves narrowband feature with full widths at half maximum (FWHM) values of 28 nm in film and 32 nm in OLEDs and achieves 40% increased photoluminescence (92%) and electroluminescence quantum efficiencies (28%). It is showed that insulation effect of P=O effectively confines the singlet excited state on MR core to keep emission color purity, and its induction effect enhances singlet radiation and triplet-to-singlet conversion. This synergism for selective optimization is based on rational linkage between MR core and functional groups.
The Feedback Loop Between the Demand for Voluntary Private Insurance and the Burden of Healthcare System: An Explanatory System Dynamics Model of Hong Kong
Authors: Zou Yiran , Chen Junqiao
Published: June 2022

Background: Many countries with universal healthcare have a parallel private healthcare sector due to the waiting time in the public sector. People purchase individual health insurance to pay for private services. Past studies on the relationship between the public sector’s waiting time and the demand for health insurance have two limitations: not considering the capacity of the private sector, and subsequently, the omission of a feedback loop. These limitations are also present in the health insurance policy discussion in Hong Kong, where the public sector is overstretched. A lack of understanding of market dynamics might lead to unrealistic expectations of public policy. This study highlights these limitations, and tries to answer the research question: whether the historical dynamics between the intersectoral imbalance of burden and the demand for health insurance in Hong Kong could be quantitatively explained. Methods: A system dynamics model was created based on a negative feedback loop. The model’s initial input was the percentage of population with health insurance in 2009, and to simulate the percentage continuously until 2019. Results from 2015 to 2019 were compared with actual figures to examine the model’s explanatory power. Multivariable sensitivity analysis was performed. Results: With initial fluctuation, the simulated result stabilized and was within the acceptable error range from 2015 to 2019. The mean absolute percentage error (MAPE) was 0.94%. At the end of 2019, the simulated percentage of population with health insurance is 36.6% versus the "real value" of 36.7%. Simulated patient admissions and occupancy rates also approximate the reality. Sensitivity analysis demonstrates the robustness of the model. Conclusion: We can quantitatively explain the feedback loop between health system burden and demand for health insurance. With local parameterization, this model should be transferable to other universal health systems for a better understanding of the system dynamics and more informed policy-making.
How to Achieve Universal Health Coverage: A Case Study of Uganda Using the Political Process Model Comment on "Health Coverage and Financial Protection in Uganda: A Political Economy Perspective"
Authors: Eusebio Cidalia , Bakola Maria , Stuckler David
Published: June 2022

How can resource-deprived countries accelerate progress towards universal health coverage (UHC)? Here we extend the analysis of Nanini and colleagues to investigate a case-study of Uganda, where despite high-level commitments, health system priority and funding has shrunk over the past two decades. We draw on the Stuckler-McKee adapted Political Process model to evaluate three forces for effecting change: reframing the debate; acting on political windows of opportunity; and mobilising resources. Our analysis proposes a series of pragmatic steps from academics, non-governmental organisations, and government officials that can help neutralise the forces that oppose UHC and overcome fragmentation of the pro-UHC movement.
Entre los “aires gaditanos” y la herencia borbónica
Authors: Fandos Cecilia Alejandra
Published: June 2022

Este estudio se centra en el análisis de una figura central de gobierno de la región de la Puna, en la provincia de Jujuy, entre 1825 y 1853: los subdelegados. Desde esa base se propone establecer un canal de diálogo con otras experiencias del tipo en la Argentina y con el influjo de las Cortes de Cádiz y la constitución gaditana de 1812. Se abordan cuestiones ligadas a la titularidad, territorialización, fragmentación y representación de las soberanías en juego en la jurisdicción estudiada. Se analizan dos momentos claves del desempeño de esta magistratura en la Puna que revelan, en primer término, los conflictos con el cabildo de Jujuy durante la década de 1820 y, en segundo término, la gravitación del sistema federal en los años de 1840.
Revisitando el proceso de formación del Estado federal
Authors: Basconzuelo Celia Cristina
Published: June 2022

Este artículo aporta a un mayor conocimiento de la construcción del Estado federal durante los años 1852 a 1861, a partir del análisis sobre el desempeño de actores sociales y agentes estatales en el sur de la provincia de Córdoba, un espacio que comprendía el departamento Río Cuarto y la frontera interior. Es de interés para este trabajo resignificar el rol articulador de los actores socio-institucionales actuantes en el espacio sureño cordobés y considerar las tensiones que allí se desencadenaron, a la luz de la correspondencia oficial. Se focaliza en las prácticas desarrolladas por autoridades civiles y militares, en su papel de intermediarios en una dinámica que requería de sujetos activos que vehiculizaran, proyectaran y materializaran en las sociedades donde se desenvolvían, la presencia estatal. El análisis se ocupa de las acciones y discursos que confirmaban esa articulación y de las que revelaban los conflictos para demostrar cómo desde el sur cordobés se reaccionaba frente a los nudos críticos que supuso la construcción estatal en la etapa de la Confederación Argentina.
Ni solitaria ni ausente
Authors: Delgado Leandro , Ordoñez Santiago
Published: June 2022

Tradicionalmente se identifica a la generación de las subculturas del rock uruguayo de los ochenta como antipolítica, antipartidaria y “huérfana” respecto de una tradición cultural de la cual habría renegado por no representar sus inquietudes en el rampante optimismo de la nueva democracia. Sin embargo, existieron grupos pertenecientes a estas subculturas cuyas actividades cuestionan estos rasgos. La Brigada Luca Prodan participó activamente en los espacios de la subcultura rock del período al tiempo que lo hacía en la Juventud Socialista del Uruguay a la que pertenecían sus integrantes con menores o mayores conflictos. A partir de entrevistas personales, este artículo reconstruye la conformación y el funcionamiento de la brigada, así como su progresivo alejamiento del Partido Socialista, señala las nuevas formas de acción política llevadas adelante por el grupo en su vínculo generacional con las subculturas del rock y problematiza, en consecuencia, los rasgos atribuidos a esta subcultura como característicos de toda una generación.
Aires jujeños: Breve entrevista a la Dra. Gabriela Sica
Authors: Márquez Ignacio
Published: June 2022

Gabriela Sica es una historiadora doctorada por la Universidad de Sevilla, investigadora del CONICET, integrante del Centro Interdisciplinario de Investigaciones en Tecnologías y Desarrollo Social para el NOA, Master en Historia Latinoamericana (España) y docente de la Universidad Nacional de Jujuy.
Reseña de: Andrea Andújar y Ernesto Bohoslavsky (Comps.). Todos estos años de gente. Historia social, protesta y política en América Latina. Buenos Aires: Ediciones Universidad Nacional de General Sarmiento, 2020, 152 páginas.
Authors: Brandolini Carolina
Published: June 2022

Convencidos de la existencia de un “hilo rojo” que enlaza a la historia social con anhelos de transformación, Andújar y Bohoslavsky convocaron a seis historiadores inscriptos en este enfoque a compartir reflexiones y experiencias acerca de sus objetos de estudio y de su propia práctica situada en la compleja trama del presente latinoamericano
Sobre la historia de la cultura en Argentina
Authors: Agüero Ana Clarisa
Published: June 2022

Nacido como intento de balance de la historia cultural contemporánea, el texto parte de la paradoja de una máxima presencia de la nota “cultural” y una mínima consistencia disciplinar específica. Sugiere que, desde los años noventa y por razones no sólo historiográficas, el impacto de las nuevas historias culturales noratlánticas favoreció un corte con ciertos desarrollos vernáculos anteriores, discontinuos pero expresivos de la prolongada pretensión integradora de la historia cultural. Y que aquella interrupción (que remonta) tuvo un costo formativo y proyectivo, que aconseja establecer un diálogo tenso con ese legado y estrechar el lazo con las otras historias.
El territorio entrerriano como objeto de disputa en la década de 1810
Authors: Heinze Evelyn Janet
Published: June 2022

En el Río de la Plata, la Revolución de Mayo de 1810 habilitó la discusión acerca de la construcción de un nuevo orden, donde las distintas posiciones políticas se dirimieron en guerras. Uno de los escenarios claves de disputas fue el territorio entrerriano, siendo el propósito del presente artículo estudiar los factores que hacen del mismo un espacio estratégico en la región. El mirador seleccionado es la coyuntura de 1817-1818, momento en el cual el enfrentamiento entre artiguistas y directoriales se instala en el espacio en cuestión, y el escenario que nos permite analizar el accionar de los líderes locales.
O Banquete e o Simpósio Antigos como oportunidades educacionais
Authors: TORRES Milton
Published: June 2022

O presente artigo faz uma leitura de uma obra da Antiguidade clássica, conhecida como Banquete dos sábios (Deipnosophistai), de Ateneu de Náucratis, com o intento de analisar as inúmeros referências das personagens, algumas de existência histórica real, aos aspectos educacionais dos antigos banquetes e simpósios gregos, com a finalidade de analisar brevemente os mecanismos de convivência ritualizada com os filósofos, instituídos pelos antigos gregos para a socialização e  educação de seus jovens.