bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vibration damping capacity of a rotating shaft heat treated by various procedures
Authors: Kam Menderes , Saruhan Hamit , Kabasakaloglu Ufuk , Guney Tolga 
Published: October 2021

Abstract
Many of today’s rotating shaft systems require the superior stability characteristics of a rotating shaft to prevent system instability. Rotating shaft material properties play a crucial role in the vibration behavior of rotating shaft systems. It is important to control vibrations in the systems because excessive vibration amplitudes can cause inefficiency and system failure. The objective of this study is to investigate the vibration damping capacity of a rotating shaft treated by various procedures (deep cryogenic treatment, induction hardening, hot forging, and conventional heat treatment) in order to see the effects of the treatment procedures. An AISI 4140 steel material for the rotating shaft was selected because it is the most widely used material in industry. The rotating shaft is supported on oil lubricated journal bearings rather than rolling element bearings as used in prior studies by the authors. The results showed that rotating shaft material damping capacity due to treatment processes plays a major role for the rotating shaft systems stability. It is observed that the vibration damping ability of the rotating shaft with induction hardening to dissipate mechanical vibration was superior to deep cryogenic treatment, especially to hot forging and conventional heat treatment processes. Also, the results indicate that the dynamics characteristics of the rotating shafts supported by oil lubricated journal bearings are different to those supported by rolling element bearings.
Effects of alloying, heat treatment and nanoreinforcement on mechanical properties and damping performances of Cu–Al-based alloys: A review
Authors: Yang Liu , Jiang Xiaosong , Sun Hongliang , Shao Zhenyi , Fang Yongjian , Shu Rui 
Published: October 2021

Abstract
Cu–Al-based alloys are a kind of new functional material. Due to their unique thermoelastic martensite structure, they have excellent damping performance, which has become a research hotspot in the field of materials science and engineering in recent years. However, the elastic anisotropy and large grain size easily cause a brittle fracture, which is harmful to the mechanical properties of the material. In order to meet the practical needs of engineering, it is an important choice to design Cu–Al-based alloys with excellent mechanical properties and damping performances from the perspective of refining the grain size. When the grain size is small, the effect of fine grain strengthening and interfacial damping can play a role simultaneously to obtain Cu–Al-based alloys with excellent comprehensive properties. In this paper, several common preparation methods of Cu–Al-based alloy are introduced firstly. Then the contributions of researchers in refining grain size from alloying and heat treatment are summarized. Meanwhile, nanomaterials can be used as the reinforcing phase of Cu–Al based alloy, and play a superb role in mechanical properties and damping performances. The purpose of this study is to provide a reference for the further research of structure-function integrated materials with high strength and high damping simultaneously. Finally, the development of Cu–Al-based alloy from the aspects of 3D printing and numerical simulation is prospected.
Distribution of Organic-Tempered Pottery in Southeast Europe and the Near East: A Complex Picture. The Case of Northern Greece
Authors: Papadakou Trisevgeni , Kotsakis Kostas , Urem-Kotsou Dushka 
Published: October 2021

AbstractOrganic-tempered pottery is considered characteristic for the early pottery assemblages in most parts of Southwest Asia and Southeast Europe. The aim of the present paper is to explore: (a) the chronological consistency of this practice, i.e. is it always related to the early assemblages and how intensively was it employed by the various communities? and (b) is its use related to vessel type, surface treatment etc. and how does this change in time and space? In order to address these questions we explore the distribution patterns of this practice in this large geographical area, based on published information, since the appearance of pottery in the Near East until the early sixth millennium in Southeast Europe. Moreover, in the case of the Early Neolithic in Greece, new data is presented on the appearance and distribution of organic-tempered pottery within the assemblages of six newly studied sites in northern Greece, spanning the second half of the seventh millennium BC and the beginning of the sixth millennium BC. The emerging picture indicates that the cultural practice of organic tempering was available in all of this area for almost a millennium, although the significations may have not remained unaltered, and variably embraced by the various Neolithic communities. As such, this study offers insights into the complex process of neolithisation, and at the same time contextualizes the appearance of organic-tempering in northern Greece, which includes some of the earliest Neolithic sites in Europe.
Überlegungen zu Form und Gattung in Hieronymus’ Briefen
Authors: Derhard-Lesieur Gina 
Published: October 2021

Abstract
I propose to approach a selection of Jerome’s Letters with the theory of generic modes as established by Alastair Fowler and Klaus W. Hempfer, and with the concept of generic enrichment developed by Stephen J. Harrison. Using these concepts the epistolary genre, which is known for its open nature and diverse forms, can be approached from a shifted aesthetical perspective. My analysis focuses on two exemplary letters. In the first of these two letters, Jerome asks a friend to join him in his ascetic lifestyle in the desert (Hieronymus, Epistula 14). To illustrate the progress of his arguments Jerome employs traditional nautical metaphors and develops a literary celeuma. He does this by turning it into a model for the letter’s form and by extending the epistolary genre through a hymn-like mode. Thus, the author christianises the celeuma and turns it into a hymn. In the second letter, Jerome asks a Christian widow to leave Rome and to join him in Bethlehem (Hieronymus, Epistula 46). The author integrates a satirical mode in some passages that allude to the pagan and biblical traditions of satire. He therefore turns his satirical description into an argument supporting his purpose. Both the hymn-like elements and the satirical passages do not have the complete outer form of the according genres but do rather correspond to the concept of modes. The epistolary genre is therefore extended but not replaced by these modes and gains additional meaning through their integration.
Catholic Identity in a Hostile Vandal Context: Insights from the Notitia Provinciarum
Authors: Scheerer Christoph 
Published: October 2021

Abstract
Evaluating the Notitia Provinciarum, ambiguities regarding the transmission and the content are to be encountered. This paper attempts to gain a consistent view on this document in respect to facts conveyed and the presumptive historical context and to draw conclusions concerning the identity of Catholics in Vandal Africa.
The relationship to the Historia Persecutionis by Victor of Vita and the Liber Fidei Catholicae has been surveyed. Assuming textual consistency of the document, conclusions concerning the contextual location have been drawn from its Incipit and hints inside. Linking it to events as reported in the Historia Persecutionis the meaning of appositions to names has been enlightened and a consistent understanding of the document has been demonstrated. Information regarding the identity of Catholics in Vandal Africa has been deduced from the results of this evaluation due to the fact of differences between the provinces in respect of the appositions.
Thus, different views and decisions within the African Catholic Church in regard to Vandal rule and to the relationship to Catholic ecumenical Christianity become evident. In spite of a common confession of faith as documented in the Liber Fidei Catholicae, there was no common posture toward Vandal rule and toward Catholic ecumenical Christianity.
Enhanced photocatalytic activity in hydro-thermally grown nano structured ZnO/SnS core–shell composites
Authors: Dharmana Govinda , Masabattula Prabhakara Srinivasa Rao , Potukuchi Dakshina Murthy 
Published: October 2021

Abstract
Detoxification of water bodies from industrial pollutant dyes by semiconductor heterojunction composites briefed. Synthesis of ZnO/SnS core/shell nanocomposites by ecofriendly hydrothermal method presented. Characterization by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis absorption spectroscopy photoluminescence (PL) etc., were presented. Abundance of orthorhombic ZnO and hexagonal SnS was confirmed by X-ray diffraction. Compression of hexagonal ZnO planes (as core nanorods) and SnS core nanoparticles infers growth of core shell structure. Average crystallite size is found to be 5.8 nm. Structure and TEM morphology correlated. XPS reveals abundance of elemental oxidation state. Photocatalytic activity was studied by using visible light irradiation. Photoluminescence for ZnO/SnS core/shell nanocomposites inferred significant emission peaks. Enhanced PCA observed against visible light. Methylene blue dye characteristic PCAby its degradation evinced. PCA is found optimal for Z-S3. Configuration of bandgap promoted growth of novel hetero junction. Physical mechanism is proposed for the enhanced photocatalytic activity as accompanied by degradation of MB dye.
Novel thiazolyl-hydrazone derivatives including piperazine ring: synthesis, in vitro evaluation, and molecular docking as selective MAO-A inhibitor
Authors: Osmaniye Derya , Alaşan Ramazan , Sağlık Begüm Nurpelin , Levent Serkan , Özkay Yusuf , Kaplancıklı Zafer Asım 
Published: October 2021

Abstract
MAO-A inhibitors are used in the treatment of depression. There are many studies showing that the thiazolyl-hydrazone structure is a pharmacophore structure for the MAO enzyme. In previous studies by our team, activity studies were carried out with thiazolyl-hydrazone derivatives containing pyrrolidine, morpholine, and piperazine. All of them were displayed MAO-A selective inhibition profile. Additionally, derivatives containing piperazine ring were most active. For this purpose, thiazolyl-hydrazone derivatives containing piperazine were synthesized, but this time an active group, formyl group, was added to the piperazine ring as a substituent. Based on this view, new thiazolyl-hydrazone compounds were synthesized, characterized, and screened for their hMAO-A and hMAO-B inhibitory activity by an in vitro fluorometric method. The structure of the compound was tried to be fully elucidated using 2D NMR technique. The compound including 2,4-dimethyl substituent (3i) were found to be the most effective agents in the series against MAO-A enzyme with the IC50 value of 0.080 ± 0.003 µM. The docking study of compound 3i revealed that there is a strong interaction between the active sites of hMAO-A and analyzed compound.
An overview of thermotransport in fluorite-related ionic oxides
Authors: Momenzadeh Leila , Grieshammer Steffen , Belova Irina V. , Murch Graeme E. 
Published: October 2021

Abstract
In this overview, we summarize the phenomenon of thermotransport (the close coupling of mass transport and heat transport) in two fast ion conductors: yttria-doped zirconia and gadolinia-doped ceria. We focus on two recent molecular dynamics calculations using the Green-Kubo formalism. We show that the Onsager thermotransport cross coefficient (mass-heat coupling) is negative, meaning that oxygen ions would drift, in principle, to the hot side in a temperature gradient. Simulation results presented in this overview show reasonable agreement with available experimental data for thermal conductivity. Results of this study suggest that the coupling between mass and heat transport in oxygen ion electrolytes could have significant effect for practical applications.
Identifikation qualitätskritischer Parameter
Authors: Abramowski Johann-Philip , Kies Alexander , Landwehr Inga , Aichele Andreas , Hachgenei Enno , Schmitt Robert H. , Sauer Alexander 
Published: October 2021

Abstract
Die Herstellung von Batteriezellen setzt sich aus einer Vielzahl von Einzelprozessen mit jeweils unterschiedlichen Qualitätsansprüchen zusammen. Mit dem Ziel, eine hochwertige und leistungsstarke Batteriezelle zu produzieren, ist daher für die interprozessuale Qualitätskontrolle und Prozessoptimierung die Kenntnis qualitätskritischer Parameter essenziell. In diesem Beitrag werden die Identifikation dieser Parameter und die anschließende Aufnahme von Ursache-Wirkungs-Zusammenhängen als Basis für das digitale Qualitätsmanagement beschrieben.
Augmented Reality zur Steigerung der Arbeitssicherheit von Mobilkranen
Authors: Quandt Moritz , Panter Lars , Staar Benjamin , Steinbacher Lennart , Freitag Michael 
Published: October 2021

Abstract
Der Einsatz von Nutzfahrzeugen bringt eine hohe Anzahl schwerer Unfälle mit sich. Mit bildverarbeitenden Verfahren können die Maschinenführenden gezielt auf Gefahrensituationen hingewiesen werden. Dieser Beitrag stellt eine bilddatenbasierte Bewegungsprognose von Personen im Gefahrenbereich eines Mobilkrans dar. Die Visualisierung dieser Gefahrensituationen mittels AR-Technologie ermöglicht einen rechtzeitigen Eingriff durch die Kranführenden. In Labor- und Feldtests konnte die Funktionsfähigkeit des Systems nachgewiesen werden.
Endogenous Oxalate Production in Primary Hyperoxaluria Type 1 Patients
Authors: Garrelfs Sander F. , van Harskamp Dewi , Peters-Sengers Hessel , van den Akker Chris H.P. , Wanders Ronald J.A. , Wijburg Frits A. , van Goudoever Johannes B. , Groothoff Jaap W. , Schierbeek Henk , Oosterveld Michiel J.S. 
Published: October 2021

Significance Statement
Primary hyperoxaluria type 1 (PH1) is a rare genetic disorder characterized by increased endogenous oxalate production (EOP). The metabolic pathways underlying oxalate synthesis have not been fully elucidated. Measurement of EOP can help evaluate PH1 drugs under development. By infusing stable isotopes of oxalate, glycolate, and glycine, we measured EOP and the contribution of glycolate to EOP and glycine production (to assess pyridoxine responsiveness) in patients with PH1 and in healthy volunteers. In this study, we provide a precise method to quantify oxalate kinetics that could serve as an additional tool to evaluate therapeutic efficacy and inform important clinical decisions (e.g., suitability for a kidney-alone transplant and prevent a liver transplant after pyridoxine or RNAi treatment).

Background
Primary hyperoxaluria type 1 (PH1) is an inborn error of glyoxylate metabolism, characterized by increased endogenous oxalate production. The metabolic pathways underlying oxalate synthesis have not been fully elucidated, and upcoming therapies require more reliable outcome parameters than the currently used plasma oxalate levels and urinary oxalate excretion rates. We therefore developed a stable isotope infusion protocol to assess endogenous oxalate synthesis rate and the contribution of glycolate to both oxalate and glycine synthesis in vivo.

Methods
Eight healthy volunteers and eight patients with PH1 (stratified by pyridoxine responsiveness) underwent a combined primed continuous infusion of intravenous [1-13C]glycolate, [U-13C2]oxalate, and, in a subgroup, [D5]glycine. Isotopic enrichment of 13C-labeled oxalate and glycolate were measured using a new gas chromatography–tandem mass spectrometry (GC-MS/MS) method. Stable isotope dilution and incorporation calculations quantified rates of appearance and synthetic rates, respectively.

Results
Total daily oxalate rates of appearance (mean [SD]) were 2.71 (0.54), 1.46 (0.23), and 0.79 (0.15) mmol/d in patients who were pyridoxine unresponsive, patients who were pyridoxine responsive, and controls, respectively (P=0.002). Mean (SD) contribution of glycolate to oxalate production was 47.3% (12.8) in patients and 1.3% (0.7) in controls. Using the incorporation of [1-13C]glycolate tracer in glycine revealed significant conversion of glycolate into glycine in pyridoxine responsive, but not in patients with PH1 who were pyridoxine unresponsive.

Conclusions
This stable isotope infusion protocol could evaluate efficacy of new therapies, investigate pyridoxine responsiveness, and serve as a tool to further explore glyoxylate metabolism in humans.
Caracterización y evolución del ejercicio de los laboratoristas dentales en el Valle de Aburrá
Authors: Mosquera Palomino Josefina , Vélez Gómez Carlos Ignacio 
Published: October 2021

Introducción: no hay una reseña histórica confiable de la evolución del ejercicio de los laboratoristas dentales en el Valle de Aburrá. Por lo tanto, no se conocen los tipos de procedimientos, equipos, y materiales que se han utilizado desde el inicio de este arte u oficio y cómo ha evolucionado hasta la actualidad.
Objetivo: caracterizar y conocer aspectos relevantes de la evolución de la práctica de los laboratoristas dentales en el Valle de Aburrá.
Materiales y métodos: se realizó una investigación cuantitativa, descriptiva, de corte transversal, participaron 100 personas que ejercen como Laboratoristas Dentales desde una tradición familiar hasta técnicos y tecnólogos graduados de diferentes instituciones de la ciudad, quienes voluntariamente decidieron hacer parte de la investigación, mediante la firma de consentimiento informado. Se aplicó encuesta para hacer una caracterización sociodemográfica y conocer aspectos relevantes de la ocupación. Se tuvieron en cuenta variables sociodemográficas, aspectos referentes al ejercicio como laboratoristas dentales y origen del mismo.
Resultados: se encontró diferencia significativa entre el nivel de formación y la realización de cursos de actualización y las áreas de desempeño. También hay diferencia significativa entre la edad y el nivel de formación y la edad y el tipo de equipos con que cuentan en el laboratorio, situaciones donde los valores hallados tienen p < 0,05.
Conclusiones: la mayoría de los encuestados son empíricos y técnicos y es preocupante que el 94 % de ellos no conocen sobre el origen de la ocupación en el Valle de Aburra, además, hay un 28 % que no se actualiza y prefiere las técnicas pasadas. Sin embargo, se resalta el hecho de que la mayoría se actualiza y cuentan con equipos manuales y digitales lo que cada vez hace el mercado más competitivo. Además, se conocieron aspectos relevantes en la evolución del ejercicio de los laboratoristas dentales en el Valle de Aburrá.
Situación laboral de odontólogos egresados de la Universidad Nacional de Colombia trabajadores de Instituciones Prestadoras de Servicios de salud (IPS) privadas en Bogotá
Authors: González-Rojas Maria Alejandra , Franco-Blanco Carlos Andrés , Sánchez-Alfaro Luis Alberto 
Published: October 2021

Introducción: con el capitalismo los servicios de salud oral son considerados mercancías de consumo privado y los odontólogos medidos por su competitividad/productividad. En Colombia las empresas privadas se han apropiado en gran parte del mercado de los servicios odontológicos, contratando mediante el modelo de flexibilización laboral a odontólogos capacitados en el ámbito clínico-asistencial, en la rentabilidad empresarial y con “perfil comercial”. El objetivo de este estudio fue describir la situación laboral de odontólogos trabajadores de Instituciones Prestadoras de Servicios de salud privadas en Bogotá.
Materiales y métodos: estudio descriptivo de corte transversal; participaron 35 odontólogos egresados entre 2011 y 2016 de la Universidad Nacional de Colombia. Se diseñó un cuestionario con 35 preguntas cerradas de opciones múltiples con única respuesta; el cuestionario fue sometido a “validación de Fachada” por tres expertos. Los resultados codificados y analizados utilizando el programa estadístico STATA.
Resultados: el 71,4% de participantes es contratado mediante orden por prestación de servicios, el 20% de ellos tiene ingreso menor a USD 247.86 mensuales, con jornadas laborales de 36 a 48 horas semanales. En cuanto al nivel de formación y las funciones realizadas el 28,6% se encuentra muy insatisfecho y el 48,6% insatisfecho.
Conclusión: la situación laboral del grupo de participantes se traduce en multiempleo, vinculación laboral mediante contratos por orden de prestación de servicios, ingresos bajos, jornadas laborales extensas, escasa o nula garantía de prestaciones sociales e inestabilidad laboral. Emplearse como odontólogo en esas condiciones termina siendo la única opción debido a la poca oferta laboral, la necesidad de ingresos para sobrevivir y pagar deudas.
Relación entre la calidad de los tratamientos de ortodoncia finalizados y la satisfacción en pacientes atendidos en la Universidad Santo Tomás desde 2018 hasta 2019
Authors: Torres Ethman Ariel , Delgado-Morales Frank Nicolás , Rodríguez Martha Juliana 
Published: October 2021

Introducción: el aumento en la prestación de los servicios de ortodoncia exige resultados de alta calidad para lograr la satisfacción del paciente, pero son escasos los estudios que abordan el tema. Objetivo: determinar la relación entre la calidad de los tratamientos de ortodoncia finalizados con la satisfacción del paciente en las Clínicas del Ortodoncia de una universidad colombiana.
Métodos: se realizó un estudio observacional de corte transversal con una muestra de 67 pacientes que completaron su tratamiento de ortodoncia entre febrero de 2018 y junio de 2019. La satisfacción se evaluó con un cuestionario de 17 ítems. La calidad de los tratamientos de ortodoncia se analizó según los ocho criterios del Objective Grading System (OGS) de la American Board of Orthodontics sobre modelos de estudio y radiografías panorámicas tomadas al finalizar el tratamiento. Se calcularon frecuencias y proporciones para variables cualitativas y medidas de tendencia central y dispersión para las cuantitativas. Se utilizaron la prueba chi-cuadrado, exacta de Fisher y el coeficiente de correlación de Pearson según fuera apropiado. Un valor de p <0,05 se consideró estadísticamente significativo.
Resultados: entre los 67 participantes, 49 (73,1%) eran mujeres, la edad promedio fue 21,4 ± 9,1 años, la duración promedio del tratamiento fue 32,3 ± 5,0 meses y el número promedio de defectos fue 28,8 ± 9,2. El 38.8% respondió que estaba muy satisfecho con los resultados. No se observó una relación entre la satisfacción del paciente y la calidad de los tratamientos de ortodoncia agrupados en excelentes, aceptables y deficientes de acuerdo con los criterios del OGS.
Conclusiones: no se encontró relación entre la calidad de los resultados del tratamiento de ortodoncia según los criterios del OGS y la satisfacción del paciente. Estos resultados mostraron que es necesario proponer planes de mejora continua en el centro universitario.