bluuebunny/crossref_metadata_2025_split huggingface dataset:
Unipolar sinusoidal current excited switched reluctance motor control based on a 3D space vector modulation
Authors: Liu Jian , Wang Guofeng , Liu Di , Fan Yunsheng , Mu Dongdong 
Published: March 2022

AbstractThis paper reports on a novel unipolar current excited control scheme for the asymmetric bridge converter (ABC)‐based switched reluctance drive (SRD), where the 3D space vector modulation under three modes is developed to reduce the total harmonic distribution (THD) and torque ripple. Firstly, two different 3D vector distributions, namely, the small voltage amplitude mode and large mode are presented based on the asymmetric converter. For both distributions, the zero‐sequence voltages generated by the effective vectors are considered. Additionally, zero‐sequence vectors (1,1,1) and (−1,−1,−1) are no longer treated as null vectors and involved in the control of zero‐sequence current. Then, the duty cycles of both two modes are obtained by the combination of the zero‐sequence and two adjacent active vectors. Moreover, based on the large modulation mode, a novel method combined with the small mode is proposed to further optimise the switching costs and torque ripples. The effectiveness of the proposed modes is verified through the simulation in MATLAB and the experiment on a dSPACE‐1103‐based prototype. Compared with the conventional switched reluctance motor vector control, the proposed scheme delivers better performances of THD, efficiency and torque ripple reduction.
Bayesian multipath‐enhanced device‐free localisation: Simulation‐ and measurement‐based evaluation
Authors: Schmidhammer Martin , Siebler Benjamin , Gentner Christian , Sand Stephan , Fiebig Uwe‐Carsten 
Published: March 2022

AbstractDevice‐free localisation (DFL) systems infer presence and location of moving users by measuring to which extent they change the received signal power in wireless links. Consequently, users not only induce perturbations to the power of the line of sight but also to the power of reflected and scattered signals which are observed in the received signal as multipath components (MPCs). Since the propagation paths of MPCs differ inherently from the line‐of‐sight path, these propagation paths can be considered as additional network links. This extended network determines the multipath‐enhanced device‐free localisation (MDFL) system. Based on empirical models that relate perturbations in the received power of MPCs to the user location, the localisation problem can be solved by non‐linear Bayesian filtering. In this work, we investigate the point mass filter and the particle filter as possible solutions. We demonstrate the applicability of these solutions using ultra‐wideband measurements and develop and verify a numerical simulation framework that flexibly enables a sound evaluation of MDFL. Based on both measurements and simulations, we show a significant improvement of the localisation performance of MDFL compared to DFL. The overall localisation performance is thereby comparable for both filters. Eventually, we show that complexity and divergence probability, rather than localisation performance, are the decisive factors for the choice of the filter solution.
Guia de cáncer de pene de la Sociedad Colombiana de Urología
Authors: Genes William Pertuz , Fierro Marino Cabrera , Guerrero Andrea Estrada , Lozano Angelica María Mikan , Rozo Yineth Camila Tunjano , Sánchez Andrés Felipe Pérez 
Published: March 2022

ResumenEl cáncer de pene tiene una incidencia de 1.11 por 100.000 habitantes en Colombia, representado en el 95% por carcinoma de células escamosas el cual representa una alta morbilidad y mortalidad, La Sociedad Colombiana de Urología realizo la adaptación de la guía de cáncer de pene para el año 2021 con revisión de la literatura, esta guía permite realizar una evaluación y tratamiento del cáncer de pene, en muchas ocasiones con el objetivo de preservación de órgano utilizando la ecografía como determinante para evaluar el compromiso de la lesión a las estructuras del pene, los estudios de extensión dependerán de hallazgos al examen físico como ganglios o compromiso local de la enfermedad, de acuerdo al tipo de lesión y su estadificación puede recibir terapia con agentes tópicos, radioterapia, cirugía láser, cirugía preservadora de órgano o penectomía total; La linfadenectomía inguinal permitirá mejorar la supervivencia en tumores de riesgo intermedio y alto (>pT1G2), posteriormente la quimioterapia adyuvante esta en el grupo de pacientes en el cual la intención sea curativa, aunque en terapia paliativa de segunda línea se encuentran los platinos y texanos como alternativa pero con pobre respuesta (<30%); los esquemas de seguimiento se realiza de acuerdo al estadio y el compromiso ganglionar. Al final se presentan los resultados de actividad sexual después de cirugía preservadora de órgano; Esta guía abarca la literatura actualizada del cáncer de pene, el cual es útil para el manejo por parte de los profesionales de salud del país.
Evaluación del desgaste laboral (burnout) y ansiedad en personal de salud burante la pandemia por Covid-19
Authors: Fernández Nicolás , Prada Stefania , Villanueva-Congote Juliana , Rodríguez Santiago 
Published: March 2022

Resumen
Objetivo La pandemia por Covid-19 ha tenido consecuencias en la sanidad mental del personal de salud, una población vulnerable que se encuentra en la primera línea de atención contra el virus. Los horarios de trabajo, así como el miedo de contagiarse y contagiar a la familia, generan niveles elevados de ansiedad y desgaste laboral. El objetivo de este estudio es evaluar la presencia de desgaste laboral y ansiedad en el personal de salud durante la pandemia de Covid-19.
Métodos Se aplicaron prospectivamente el Maslach Burnout Inventory y la escala de ansiedad de Hamilton de manera electrónica a 566 trabajadores de salud en Colombia durante marzo y abril del 2020. Adicionalmente, se evaluaron la edad, el nivel educativo, el estado civil, la ocupación, la fuente de ingresos, el tipo de contratación, el número de empleos, y las horas de trabajo del personal anteriormente mencionado.
Resultados En total, se evaluaron 566 profesionales de la salud, de los cuales 60,8% eran mujeres, y el 39.2%, hombres. La muestra comprendía 85,3% de médicos, 9,2% de enfermeros, y el 5.5% restante correspondió a personal administrativo, odontólogos y paramédicos. De estos, 19,3% tenía 3 o más empleos. En términos de desgaste laboral, se evidenciaron altos niveles de agotamiento emocional y despersonalización, con bajos niveles de realización personal. Adicionalmente, se evidenció ansiedad leve.
Conclusiones Unas de las consecuencias más importantes de la pandemia por Covid-19 son los efectos a nivel de desgaste laboral y ansiedad en el personal de salud. Dados nuestros resultados, es esencial resaltar la importancia de un acompañamiento psicológico al personal de salud en tiempos de miedo e incertidumbre.
Bare quantifiers and Verb Second
Authors: Rossi Silvia , Poletto Cecilia 
Published: March 2022

Abstract
The pre-participial syntax of the bare quantifiers tutto ‘everything’, molto ‘much’ and niente ‘nothing’ in Old Italian has been argued to be determined by the optional or obligatory presence of a classifier-like category n° in their internal structures (Poletto 2014; Garzonio & Poletto 2017, 2018). Their ‘upstairs’, i.e. CP syntax, however, does not seem to be sensitive to this distinction. All of these bare QPs are equally subject to the V2 property and can appear before the inflected verb, showing the exact same distributional properties. It will be shown, however, that on the basis of interpretative differences, tutto, molto and niente are not moved to the same projection: molto targets a lower projection in the focus field, we identify as Mod(ifier)P in Rizzi (2004), while tutto and niente target positions for either contrastive or ‘new information’ focus. More generally, this will be shown to follow from the pragmatic nature of the V2 phenomenon in OI.
Discourse relations and the German prefield
Authors: Speyer Augustin 
Published: March 2022

Abstract
The prefield in German declarative main clauses (i.e. the area left of the tensed verb) usually contains exactly one phrase. As I showed in earlier work, the phrase-selection is guided by information-structural factors, scene-setting elements being preferred over contrastive elements, which in turn are preferred over aboutness topics. This paper investigates the role of discourse relations on the ranking of possible prefield phrases. It turns out that discourse relations have a direct impact on the ranking (e.g. with Explanation, topics are preferred over contrastive elements) and that phrasal discourse relation markers enter the ranking, being the most preferred prefield fillers. In Early New High German texts, this tendency is even stronger.
Influence of contact geometry over the filament bond of polylactic acid blends
Authors: Ermolai V , Sover A , Nagîţ G 
Published: March 2022

Abstract
Fused Filament Fabrication is one of the most common Additive Manufacturing technologies among industrial and domestic users because of the satisfying quality of parts and the great variety of thermoplastic polymers available on the market. New possibilities were provided along with the equipment with multiple extrusion systems, referring to multi-colour and multi-material components. Besides part orientation during the manufacturing process, filament bond influences the mechanical properties of parts produced through Fused Filament Fabrication technology. This paper aims to investigate if the bond performance for polylactic acid-based polymers can be enhanced by designing new contact geometries, different from the current surface-to-surface approach. To comprehensively understand the influence of the designed bonding geometries over the tensile strength, all specimens were produced according to a factorial design of experiment method and contact geometries constrained with function related to the nozzle size.
Research on the solid-state joining of AlMg3
Authors: Feier A I , Banciu F V 
Published: March 2022

Abstract
Nowadays, new products are wanted to reach the final consumer as soon as possible, at the lowest possible costs and in the shortest possible time. This time limitation puts its mark on all the stages necessary for product development, implicitly on the stage of their conception. Given the need for products that require assembly, of major importance, in the design phase, becomes the choice of materials and ways of joining them, the parameters of the processes to be used, equipment, tools, devices with which it is made and then joint control. Having this knowledge inventoried, for the types of processes and materials possible to be used, the time in which the choice of the way of joining is made can decrease substantially. In this context, the present paper presents experimental tests on the solid-state joining of 3 mm sheets of AlMg3 alloy, a very well weldable material with WIG process, corrosion-resistant especially in the marine environment, very good formability at low temperatures. The solid-state joining procedure of the test specimens will be presented with the help of a modified milling cutter, and the conclusions of this type of joint highlighting also the destructive examination part of the tested specimens constitute a set of knowledge that can be inventoried, stored, and used, when necessary, in the products development process. The paper thus demonstrates the potential ease of applying and reproducing Friction Stir Welding (FSW) with simple machinery (CNC milling cutter), while contributing to an understanding of the mechanical behaviour (initialization of failure) of joints. This, the behaviour and the defects are very friendly explained in the macroscopic images from the paper.
Composite materials with polychromatic effects used in electrical installations
Authors: Drăghici Mircea Florin , Stoicanescu Maria 
Published: March 2022

Abstract
The article presents the importance of using composite materials with polychromatic and heat-sensitive effects that can be used in electrical components and have an important role in transmitting visual information on various parameters of electrical components or materials in which they are used. The main condition to use any composite material to be electrical isolator is the low conductivity. The polymers are the near with these requirements and it can be used in such domain. This paper proposes to use in some applications (with a method, which will be studied in detail in future research) a basic polychromatic and heat-sensitive polymer as an electrical insulator, which has good mechanical and durability properties and at the same time provides information on the state of the material in real-time (thermal properties, electrical properties, etc.). The connection between the material features and the domain in which this material is being used is very important. The research is based on both theoretical knowledge and practice (how to obtain the material and its properties).
Analytical crash analysis of heavy truck cabin structure according to regulation ECE-R29
Authors: Ioniţă A , Iozsa M D , Stan C , Manea A M 
Published: March 2022

Abstract
The safety of the occupants is the prime consideration for all commercial vehicles’ structure design. The truck cabin must be designed in such a way that the deformation patterns of the cabin structure during an impact can assure sufficient survival space for occupants. The objective of this study is to develop a CAD method to see the behaviour of the cab structure under the impact loads and the dynamic responses of the cab structure during two complex tests in line with ECE-R29regulation. In this paper, a finite element model of a lightweight cabin is built by using its Computer-Aided Design (CAD) model (which was developed by using CATIA software) and subjected to tests by using Ansys software. The test was made in order to evaluate the energy management and the cab strength under the loads. Finally, a solution is suggested to improve the cab’s response for optimization design in order to validate an ECE R29 test.
Modelling and simulation automatic braking systems for vehicles
Authors: Badea Gabriel , Toma Marius , Micu Dan Alexandru , Frăţilă Gheorghe , Saragea Ştefan 
Published: March 2022

Abstract
An automatic braking system is an important future step in attending the autonomous vehicle. This system increases the active safety of a vehicle, significantly reducing road accidents, and lowering the effects of accidents. The paper will present the steps that will develop the autonomous braking systems in conformity with the Society of Automotive Engineers (SAE) from the USA. As well the paper will present the modelling and simulating of the automatic braking systems of a vehicle from the middle class using LMS Amesim software.
Study regarding the reduction of energy, vibrations and noises generated by the car fan
Authors: Vranau A M , Caunii V , Bujoreanu C 
Published: March 2022

Abstract
The ventilation and air conditioning system is a complex and energy-consuming one. So far there is a lot of research in this area, but most of it is related to the study of soundproofing materials behind the dashboard and the modification of the air ducts. Our paper presents a more efficient constructive solution, which will reduce energy, noise and vibration. The purpose is to study air distribution systems with multiple fans. The number of small fans will be directly proportional to the seats in the car (depending on the type of car). The difference between the system proposed by us and the classic one is that the fans will start depending on the seats occupied by the passengers. Favourable results of studies can lead to high passenger comfort. Also, vibration reduction solutions for ventilation and air conditioning systems are all the more necessary in the case of silent electric cars.
Research regarding the effects of a diesel engine’s control unit retrofitting, focussing on its performance and pollution
Authors: Suciu C C , Ionel I , Ostoia D , Igreţ S V 
Published: March 2022

Abstract
Due to the stricter and stricter European restrictions on diesel engines, fewer manufacturers produce vehicles fuelled by diesel and since not anyone affords new vehicles and the out-of-use diesel vehicle waste would be huge. New ways of improving the pollution levels on currently registered vehicles must be found. The article presents a novel approach focusing on this scope, starting with the basic actual engine, and developing by retrofitting up to mechanical and software upgrades, aiming to raise the output of mechanical characteristics and simultaneous reduction of exhaust pollution. In short, the paper is focusing on research regarding the effects of a diesel engine’s control unit retrofitting.
Research on the automation of internal logistics activities in an assembly line
Authors: Pascu I G , Neacsu G C , Nitu E L , Beloiu R , Gavriluta A 
Published: March 2022

Abstract
The need for automation and digitization has led to a rapid evolution of internal logistics processes and systems. This paper presents the automation mode logistics activities in an assembly line, by integrating a robotic arm. For the integration of the robotic arm, several steps are followed, consisting in designing the assembly line and the robotic arm using the Process Simulate software, simulating the operation of the line for different scenarios for integrating the robotic arm and analysing them. The study is completed with the realization in the laboratory of the assembly line with automated logistics activities. At the end of the project, it is desired to use the automated assembly line in the university environment, for the formation of students' competencies in the field of use of digital techniques and industrial logistics.
Eigenfrequency simulation for a roller screw used at feed system for ultrasonically aided micro-electrical discharge machining
Authors: Cristea Bogdan-Ionut , Ghiculescu Liviu Daniel , Deopale Cristian 
Published: March 2022

Abstract
The current paper focuses on the problem of resonance between the own frequency (eigenfrequency) of the roller screw and the loads attached to it, and the frequency used by the command of the feed system to actuate the stepping motor in the process of ultrasonically aided micro-electrical discharge machining. If the roller screw assembly enters resonance, meaning equality of own frequency and the actuating frequency, it starts to vibrate with uncontrollable amplitude, introducing instability of the machining process. The frequency at which the command system operates is limited to a minimum of 50 Hz (for technological machining) and a maximum of 30 000 Hz (for rapid feed), limited by the maximum torque of the motor. The main frequencies in the operating domain are simulated in Comsol, to see if the roller screw resonates with the command system. The vibrations modes were also simulated, focusing on the torsional vibrations, induced by the command of the feed system, the case of this study. The results pointed out that the roller screw does not enter resonance.
Grease lubrication of miniature ball bearings
Authors: Ianuş G , Cojocaru D , Cârlescu V , Tufescu A , Olaru D N 
Published: March 2022

Abstract
Estimation of the power loss in miniature ball bearing grease lubricated is a complex problem. Usually the applied loads (radial and axial) have small values and the methodologies recommended by the bearing companies are cannot applied for these conditions. For a ball bearing, some friction processes have differential contribution to the total friction torque and power loss. For very low loads, the lubricant is the most important source for friction torque. In the present paper the authors determined experimentally the friction torque both in a standard 7000C angular contact ball bearing (ACBB) and a modified 7000C ACBB containing only 3 balls without cage, operating with very low axial load and lubricated with lithium soap grease. The experimental values of the friction torque have been correlated with the theoretical Houpert’s IVR model developed for hydrodynamic rolling resistances in ball race contacts considering the viscosity of the base oil of grease.
How to handle the design preferences with Axiomatic Design
Authors: Gonçalves-Coelho António , Fradinho João , Gabriel-Santos António , Cavique Miguel , Mourão António 
Published: March 2022

Abstract
Picking the best design solution among a small collection of viable alternatives is often a part of engineering design. The traditional method to do it is the weighted multicriteria decision procedure. However, the Axiomatic Design (AD) framework does not employ weighting factors to deal with design preferences. Instead, AD uses the careful placing of each design range. This paper stresses the reasons AD does not include weighting factors—an imaginary flaw that teachers and designers should not attempt to change because that would break the rational soundness of AD teaching and practice. A numerical example supports our rationale.
Adjustable suspension system for lower limb prosthesis
Authors: Spanu Alina Rodica , Besnea Daniel , Moraru Edgar , Elfarra Mazen , Chiriac Oana 
Published: March 2022

Abstract
The contact between the stump and the lower limb prosthesis has to be provided by its suspension system. The paper presents a solution for an adjustable suspension designed as an inflated cell network. Each cell is supplied with controlled pressure and consequently, a contact force with the skin is developed. By varying the pressure value inside the cell, we may provide variable force, so the compensation for the volume change of the stump could be accomplished. The material the cells are made of should have special properties, the elasticity being the most important. Moreover, the goal of the paper was to approve the opportunity to use the silicone rubber Zhermack for the cell material and a mechatronic system has been realised as experimental set-up.
Effect of lubricant shear thinning behaviour on major functioning parameters of a pad bearing operating in hydrodynamic lubrication region
Authors: Salodimitris C P , Nikolakopoulos P G 
Published: March 2022

Abstract
Type of lubricant used for fluid film bearings is one of the most important factors to consider. Bearing characteristics have to maintain steady throughout a wide range of conditions. However, viscosity, which is one of the primary lubricant properties, highly deviates depending on environmental and operational conditions. Macro-molecular micro-structure of lubricants is strongly correlated to temperature and shear rate, leading to a shear thinning behaviour. This work aims in studying a pad bearing lubricated by a shear thinning oil in hydrodynamic region. Hydrodynamic wedge was modelled for a small fixed pad bearing of 8.5 mm inner radius, 14.5 mm outer radius, 40° angle and 50 μm inlet – outlet film thickness difference. Variety of cases were studied for several runner rotational velocities and minimum film thickness. Lubricant was modelled as a carreau fluid. Load carrying capacity, power losses, friction coefficient, mass flow rate, temperature and viscosity were evaluated. From the aspect of load carrying capacity, this specific pad bearing is optimally operating for rotational velocities of up to 100 krpm. Above this threshold, viscosity highly downgrades due to increase in temperature and shear rate, causing a negative impact in load capacity. Shear thinning behaviour of lubricants is of high importance and should not be considered negligible.