bluuebunny/crossref_metadata_2025 huggingface dataset:
#CadaDiaMasBarrio
Authors: Manrique Rodrigo
Published: March 2023

En torno al Barrio Carlos Mugica circulan múltiples discursos y sentidos que han variado en el tiempo. Los medios de comunicación y, principalmente, el Estado, aportan a la construcción de representaciones colectivas ligadas a este territorio, sus habitantes y las prácticas allí desarrolladas. Este trabajo analiza los modos en que el discurso del Gobierno de la Ciudad de Buenos Aires, bajo la gestión de Horacio Rodríguez Larreta, representa al Barrio Mugica en el contexto de su urbanización (2016-2017), considerando las alteridades históricas y fronteras simbólicas que éste construye.
Autopercepción de las prácticas de liderazgo directivo-educativo en territorios de diversidad cultural
Authors: Maquera-Maquera Yanet Amanda , Bermejo-Gonzáles Luz Yohana , Bermejo-Paredes Saúl
Published: March 2023

El estudio tiene por objetivo interpretar la autopercepción de las prácticas de liderazgo en directores que ocupan la alta dirección de las Unidades de Gestión Educativa Local en el departamento de Puno-Perú, situados en redes territoriales de diversidad cultural aimara, quechua y español; es de naturaleza cualitativa-hermenéutica, que valiéndose de la técnica de la entrevista en profundidad y el análisis de contenido asistido por el programa MaxQda, analiza 05 categorías de prácticas de liderazgo.  Los resultados develan que, la alta dirección proyecta una imagen de liderazgo individual, mediado por el poder político, con predominancia de prácticas y decisiones inconexas, centrado en patrones jerárquicos de gestión organizacional, y desvinculados del contexto territorial, exigencias y desafíos que impone la complejidad del mundo actual. Por consiguiente deben rediseñarse las estructuras organizacionales educativas, en la perspectiva de prácticas de liderazgo sostenibles en modelos de actuación compartida, distribuida, sistémica e intercultural.
On the Effect of Reciprocal Dyadic Relations on the Share of Lexical Practices
Authors: Fernandez Guillaume P.
Published: March 2023

Variationist studies have shown the implication of tie properties in the emergence and preservation of linguistic norms. This contribution deepens the understanding of this mechanism at the dyadic level. It explores relational subjectivity and relativity among individuals of a community and their implications in the distribution of lexical variants. The aim is to understand how the reciprocity of a relation influences the share of lexical practices. To do so, we analyze the network of discussions of bachelor's degree students of the University of Geneva and their lexical practices. Using the modern methods used in social network analysis to study relational properties and by running multiple regression quadratic assignment procedure (MRQAP), reciprocal interactions are found to lead to a higher lexical share and similarity.
O fim do primeiro reinado e a consolidação da Independência do Brasil
Authors: Alves Pereira Antônio Celso
Published: March 2023

O objeto do presente texto, ao ensejo das comemorações do bicentenário da Independência do Brasil, centraliza-se na afirmação de autores como Joaquim Nabuco, Sérgio Buarque de Holanda e Teófilo Ottoni, entre outros, segundo a qual a abdicação do imperador D. Pedro I, em 1831, após nove anos e sete meses de tumultuado reinado, constituiu-se no ato complementar e final do longo e gradual processo de separação do Brasil de Portugal.
Patellar tendon ruptures repaired through a simple modified reconstruction using hamstrings tendon graft in obese patient: surgical technique and case report
Authors: Alshomrany Abdullah , Almuawi Abdullah , Alkhathami Abdulmajeed , Aggor Ahmed , Almotheby Abdullah
Published: March 2023

Background: Patellar tendon ruptures are uncommon, severe, and are complex cases that require early surgical intervention. Loss of function of the extensor mechanism of the knee joint might cause severe disability and inability to hold a standing position.
Case Presentation: A 34-year-old Saudi male, known to have morbid obesity (class 1), came to the emergency room complaining of severe pain in the left knee after experiencing a fall on a flexed knee while playing soccer. The patient had no other significant past medical history. In this case, the injury occurred due to a minor sports accident, and there were no predisposing factors. Thus, it was decided to do patellar tendon augmented reconstruction using a pedicled hamstring tendon, involving primary repair. After the surgery, a cast was applied on the patient's knee and retained for 3 weeks, allowing only active knee flexion and passive extension. Then, active assisted knee extension was allowed through physiotherapy for 2 months, until 75%-80% of active extension was achieved. Patient was moved to out-patient department after 3 months for further assessment.
Conclusion: Patellar tendon ruptures from the tibial tuberosity are quite uncommon. When the patient has morbid obesity, acute repair of the patellar tendon through reconstruction using hamstring tendons could give a positive result with good outcome in the joint's movement.
Analysis of Legislation and Precedents Related to Overlapping Gatherings in the UK: Including the Precedents of the European Court of Human Rights
Authors:   Institute of British & American Studies Center for International Area Studies Hankuk University of Foreign Studies, Yeom Yunho , Jung Jeyong
Published: March 2023

Britain has traditionally recognized the right to assembly and demonstration as one of the basic rights of its citizens, and there has been no written law. In 1998, while recognizing the domestic legal effect of the European Convention on Human Rights, the right to assembly was also accepted in society. However, there is a limitation that the statutory law does not regulate the overlapping assemblies which have various problems. Nevertheless, English courts present a legal judgment on the issue of overlapping assemblies based on the relevant provisions of the European Convention on Human Rights and the precedents of the European Court of Human Rights. Regardless of the order of notification of overlapping assemblies, it is judged first whether the substantive contents of the assemblies conform to the characteristics of the rights to be protected by the European Convention on Human Rights, and whether an assembly is worthy of protection as a 'peaceful assembly'. Even if intervention by state agencies is unavoidable, such interference must minimally violate the right to assembly, and must have a legal basis, a legitimate purpose, and a necessity for a democratic society. It is understood that, on the basis of these conditions, state bodies may prohibit or restrict overlapping gatherings. This tendency is interpreted as suggesting that multiple factors should be substantially evaluated for each case, rather than formally limiting the overlapping assemblies.
Geochemical evolution of magmatic rocks in the Vioolsdrif Domain, Namibia
Authors: Minnitt R.C.A. , Esbensen K.H.
Published: March 2023

Geological, lithological, petrographical, geochemical, and geochronological data in the Palaeoproterozoic Richtersveld Subprovince/Magmatic Arc (RMA) of Precambrian basement rocks of the Vioolsdrif Domain in southern Namibia, strongly support linkages in the history of formation between the volcanic rock types of the Orange River Group (ORG) and the plutonic rocks of the Vioolsdrif Suite (VS). Previous age dating indicates volcanics of the ORG are more-or-less synchronous with granitic phases of the VS. Geochemical, mineralogical, and comprehensive field and petrological characteristics of the volcanic and granitic rocks suggest genetically linked, parallel igneous-effusive rock suites through processes of fractional crystallisation. Intermittent tapping of evolving residual magmas produced an extrusive carapace of volcanic rocks covering the granitic rocks in a classic magmatic differentiation context of parallel geochemical and lithological evolution. As the magma chamber fractionated plutonic phases of the VS at depth, it extruded residual liquids as volcanic flows and ejecta at surface to form the ORG. A first principal model, based on Ba, Rb and Sr trace element and SiO2, MgO, Al2O3, TiO2 major element behaviour, is supported by multivariate modelling of 28 major and trace elements in 129 rock analyses using Principal Component Analysis (PCA). PCA indicates the first four components account for more than 80% of the total compositional variance in all rock types lending comprehensive support for a linked geochemical differentiation model for both the igneous and the volcanic suites. Strong evidence for the magmatic co-evolution of the plutonic and effusive series includes the Cu-mineralisation event, which manifests itself as a resolvable, orthogonal fifth principal component, geochemically overprinting the intermediate ‘porphyry monzogranite’ differentiation stages, but not related to the terminal leuco-granites. The full spectrum of geochemical relationships is consistent with current models of a direct genetic relationship between evolving high Sr/Y magmas and hydrothermal porphyry Cu deposits, in overall agreement with the full context of field, rock, mineralogical, geochemical, and economic geology interpretations presented here.
Deriving Lidar Sensor Requirements for Use in Wake Impact Alleviation Functions
Authors: Schwithal Jana , Fezans Nicolas
Published: March 2023

The paper complements previous works of the authors on lidar-based active wake impact alleviation control functions by investigating the lidar sensor requirements for such systems. This control system can increase the safety during wake-vortex encounters by preventing a dangerous sudden (in particular rolling) motion, which often characterizes wake-vortex encounters. Such technology could provide an opportunity to relax the current wake-vortex-based separation minima and thus lead to a capacity gain for airports and in the terminal area. The performance of this system obviously strongly depends on the performance of the lidar sensor, however in a nontrivial way. The direct problem, in other words, determining the system performance obtained with a given sensor configuration, already requires setting up a fully coupled simulation environment. The inverse problem, in other words, determining the best-suited set of sensor parameters, is approached in this work through parameter variations and sensitivity studies. Key performance parameters for assessing the overall system performance and providing trends for sensor requirements are defined. As for most technical systems, the best configurations are characterized by a good tradeoff of the relevant parameters, in this case field of view, measurement range, spatial resolution, and measurement noise. The coupled simulations revealed that, contrary to the authors’ expectations, very good results were already obtained with small ranges of 60 m and lateral fields of view of [Formula: see text].
Defining the Design Space for Double–Double Laminates by Considering Homogenization Criterion
Authors: Zhao Kai , Kennedy David , Miravete Antonio , Tsai Stephen W. , Featherston Carol A. , Liu Xiaoyang
Published: March 2023

The double–double (DD) laminate families that contain two continuous angles, which were proposed by Tsai (“Double–Double: New Family of Composite Laminates,” AIAA Journal, Vol. 59, No. 11, 2021, pp. 4293–4305), opened up a whole new era for composite layups, which are easy to manufacture and design. In the present study, the design space referred to as feasible regions is derived explicitly based on novel formulations for the lamination parameters of DD laminates. This enables the boundaries of the design space to be obtained analytically, providing mathematical support for DD families. The obtained result shows that their design space is larger than that of conventional quadaxial laminates in terms of industrial practices. A homogenization criterion is implemented into the design space, based on which a tailored DD laminate is proposed, expanding design possibilities and enabling homogenization to be achieved using only 16 plies/4 repeats. The work proposed offers significant benefits through practical solutions to making design, manufacturing, and testing simpler and more competitive.
A incidência de úlcera péptica em usuários crônicos de anti-inflamatórios não esteroides
Authors: Dornelas Ana Júlia Santana , Dantas Ana Luiza , Distler Anne Catherine , Scarin Giovanna Paes , Colomietz Isabella Ferreira , Paraguassu Isabella , Okata Kelly Meyre Soares de Oliveira , Martins Maria Eduarda Alves , Cabeda Rafaela , Juliani Alisson
Published: March 2023

Objetivo: Descrever a correlação entre o uso crônico de anti-inflamatórios não esteroides e a incidência de úlcera péptica. Revisão bibliográfica: Úlcera péptica é uma lesão na mucosa do trato digestivo superior, podendo gerar uma série de complicações, dentre elas, sangramento gastrointestinal, perfuração e obstrução. Há inúmeras causas para o desenvolvimento dessa patologia, sendo a mais prevalente, o uso generalizado de anti-inflamatórios. Estas são a classe de medicamentos mais usada no mundo, principalmente devido o fácil acesso e idosos com presença de comorbidades. Contudo, a longo prazo é um dos principais agentes causadores de úlcera péptica. Com isso, a prevenção tem papel importante ao identificar os fatores de risco que podem levar a formação da lesão gástrica, já que os AINES podem causar lesão tópica direta na mucosa gastrointestinal. O diagnóstico é realizado por meio da anamnese detalhada e a endoscopia digestiva alta, já o tratamento de referência é o uso de inibidores de bomba de prótons, a fim de promover a cicatrização da úlcera mediante a redução da acidez local. Considerações finais: A maioria das úlceras pépticas são causadas pelo uso crônico de anti-inflamatórios. Portanto, deve-se diagnosticar e tratar precocemente os pacientes para evitar complicações.
Finding the straw that breaks the cancer's back?
Authors: Köse Hazal , Wirth Matthias
Published: March 2023

One of the major challenges in cancer therapy is the recurrent emergence of resistance. In pancreatic cancer, we uncovered one such resistance mechanism. Inhibiting a protein which is highly expressed in a therapy-resistant subtype of pancreatic cancer could pave the way for new therapies and improve survival of patients.
Girls are more likely to attribute failure to lack of talent
Authors: Napp Clotilde , Breda Thomas
Published: March 2023

We used international survey data from 500,000 students to show that genders attribute differently their failure to a lack of talent and argued that these differences reflect gender stereotypes about talent and relate to the glass ceiling. These differences are present in almost all of the 72 countries studied, and are stronger among high achieving students and in more developed countries
Lumbar paraspinal intramuscular myxoma: A case report
Authors: Hipólito-Reis José , Roque Diogo , Teixeira Joaquim Cruz
Published: March 2023

Background:

With an estimated incidence of about 1 case/million patients, paravertebral intramuscular myxomas represent a rare cause of lumbar pain. Rather, they typically occur in the heart and in bone tissues.

Case Description:

A 64-year-old female presented with a protracted course of nocturnal lumbar pain that radiated to the anterior aspect of the right thigh accompanied by numbness. She reported a slow-growing right paramedian lumbar mass in the previous months. The magnetic resonance (MR) showed a right lumbar paravertebral intramuscular mass at the L3 level (i.e., 70 × 50 mm) that had well-defined margins, and markedly enhanced with gadolinium. Following gross total “en bloc” tumor resection, the patient fully recovered. Pathologically, the myofibroblastic lesion proved to be an intramuscular myxoma without malignant changes.

Conclusion:

A 64-year-old female presented with a slow-growing MR-documented right paramedian lumbar L3 mass responsible for proximal right-thigh numbness. Following “en bloc” gross total removal of the benign intramuscular myxoma, the patient was asymptomatic.
The actinidia arguta ‘Hortgem Thai’ and actinidia deliciosa ‘Hayward’ kiwi fruit as a source of exogenous atioxidants
Authors: Pukszta Tomasz
Published: March 2023

The aim of this study was to estimate the content of exogenous antioxidants in kiwi fruits available in Gdynia, Poland, and their ability to reduce free radicals. The test material consisted of mini kiwi fruit (Actinidia arguta) of the ‘Hortgem Thai’ cultivar and kiwi fruit (Actinidia deliciosa) of the ‘Hayward’ cultivar. The carotenoid pigments were determined by the Lichtenthaler method, vitamin C in accordance with PN-A-04019:1998, polyphenols by the Folin-Ciocialteu method and the ability to reduce free radicals using a synthetic DPPH radical. One-way analysis of variance was used to determine the effect of fruit species on the quality traits analysed. The significance of differences between the means was determined using Tukey’s test. Relationships were considered statistically significant at p < 0.05. Correlation coefficients between the antioxidant activity of kiwi fruit and the content of exogenous antioxidants were also determined. The results showed that Actinidia arguta has significantly higher contents of exogenous antioxidants than Actinidia deliciosa. The antioxidant properties of this fruit were also found to be mainly due to its vitamin C content.
Ultrafast spin crossover photochemical mechanism in [Fe(2,2'−bipyridine)3]2+ revealed by quantum dynamics
Authors: Alias-Rodriguez Marc , Bhattacharyya Swarnendu , Huix-Rotllant Miquel
Published: March 2023

The role of triplet intermediates in the photoinduced spin crossover reaction of [FeII(2,2'-bipyridine)3]2+ is still under debate. Employing quantum dynamics, we show that the metal-centered (MC) triplets are responsible for the transfer to the quintet high-spin state. This photochemical pathway is made possible thanks to bipyridine stretching vibrations, facilitating the transfer between the initial metal-ligand charge transfer (MLCT) states to the MC triplets. These results show the central role of ligands in modulating the excited state spectrum and the photochemical mechanism, opening the route for increased metal-centered lifetime that increases the effciency of iron-based photocatalysts.
Prospects of Nanoparticle-based Radioenhancement for Radiotherapy
Authors: Gerken Lukas R. H. , Gerdes Maren , Pruschy Martin , Herrmann Inge K.
Published: March 2023

Radiotherapy is a key pillar of solid cancer treatment. Despite high level of conformal dose deposition, radiotherapy is limited due to co-irradiation of organs-at risk and subsequent normal tissue toxicities. Nanotechnology offers an attractive opportunity for increasing the efficacy and safety of cancer radiotherapy. Leveraging the freedom of design and the growing synthetic capabilities of the nanomaterial-community, a variety of engineered nanomaterials have been designed and investigated as radiosensitizers or radioenhancers. While research so far has been primarily focused on gold nanoparticles and other high atomic number materials to increase the absorption cross section of tumor tissue, recent studies are challenging the traditional concept of high-Z nanoparticle radioenhancers and highlight the importance of catalytic activity. This review provides a concise overview on the fundamental knowledge of nanoparticle radioenhancement mechanisms and their quantification. It critically discusses potential radioenhancer candidate materials and general design criteria for different radiation therapy modalities, and concludes with research priorities in order to advance the development of nanomaterials, to enhance the efficacy of radiotherapy and to increase at the same time the therapeutic window.
Transition Metal Isocorroles as Singlet Oxygen Sensitizers
Authors: Larsen Simon , Adewuyi Joseph , Ung Gael , Ghosh Abhik
Published: March 2023

Building on a highly efficient synthesis of pyrrole-appended isocorroles, we have worked out conditions for manganese, palladium, and platinum insertion into free-base 5/10-(2-pyrrolyl)-5,10,15-tris(4-methylphenyl)isocorrole, H2[5/10-(2-py)TpMePiC]. Platinum insertion proved exceedingly challenging but was finally accomplished with cis-Pt(PhCN)2Cl2. All the complexes proved weakly phosphorescent in the near-infrared under ambient conditions, with a maximum phosphorescence quantum yield of 0.1% observed for Pd[5-(2-py)TpMePiC]. The emission maximum proved was found to exhibit a strong metal ion dependence for the 5-regiosomeric complexes, but not for the 10-regioisomers. Despite the low phosphorescence quantum yields, all the complexes were found to sensitize singlet oxygen formation with moderate to good efficiency, with singlet oxygen quantum yields ranging over 21-52%. With significant absorption in the near-infrared and good singlet oxygen-sensitizing ability, metalloisocorroles deserve examination as photosensitizers in photodynamic therapy of cancer and other diseases.
Sub-second HKUST-1 Synthesis in Continuous Flow Supercritical CO2 Reactor
Authors: HOSSAIN MOHAMMAD MASRUR , Austin Conrad , Novosselov Igor V.
Published: March 2023

The efficient, reliable, and environmentally friendly synthesis of Metal-Organic Frameworks (MOFs) can trigger their wide adoption in many practical applications. Addressing this challenge, this study focuses on optimizing the continuous flow synthesis of Copper Benzene-1,3,5-Tricarboxylate (HKUST-1) in a supercritical carbon dioxide (scCO2) environment. The effects of the synthesis parameters on the physiochemical characteristics of MOF were investigated over a wide range of CO2 injection temperature Tinj = 50 300 C while maintaining sub-second reactor residence time ~ 650 ms. The X-ray diffraction analysis (XRD) verified a well-defined MOF crystal structure. Analysis of the MOFs' surface area and pore sizes indicated that the optimal properties were obtained at a CO2 injection temperature of 150 C corresponding to an average reactor temperature of ~80 C with the maximum BET-specific surface area ~ 1,550 m2/g and pore size ~ 10.55 . At lower synthesis temperatures, the pore sizes and BET-specific surface area are lower due to insufficient activation, while at temperatures Tinj >250C, BET surface area decreases significantly due to the degradation of organic precursors. The increase in the synthesis temperature results in a fast MOF synthesis and activation due to a single-phase supercritical environment; however, high CO2 injection temperatures may create a high-temperature gradient leading to rapid degradation of organic precursors. This work demonstrates the feasibility of sub-second synthesis of high-quality MOFs and highlights the need to optimize the continuous flow process for HKUST-1 and other MOFs.
Budismo y Personalidad. Estudio mixto cualitativo-cuantitativo en la Soka Gakkai Internacional del Uruguay
Authors: Apud Ismael , Ortuño Victor E. C , Azambuya España María Noel , Pérez Medina Estefanía , Reimondo Silva Mari Rose , González Revello Verónica , Paolillo Sofía , Pedraja Moreira Natalia Valentina
Published: March 2023

La presente investigación estudia los efectos de la práctica (daimoku), la pertenencia a la comunidad y las creencias budistas en la personalidad y temporalidad subjetiva de personas pertenecientes a la organización Soka Gakkai Internacional del Uruguay. Se utilizó un diseño mixto cuantitativo-cualitativo que incluyó la aplicación de las escalas psicométricas Zuckerman-Kuhlman-Aluja Personality Questionnaire / Short-Form y Dark Future Scale y entrevistas en profundidad. La muestra consistió en 22 sujetos que, comparados con un grupo de control, obtuvieron: i. puntuaciones significativamente más bajas y con un tamaño del efecto medio para el rasgo neuroticismo-ansiedad y cada una de sus facetas (ansiedad, depresión, dependencia y baja autoestima) y para el rasgo agresividad-hostilidad y su faceta de agresión verbal; ii. puntuaciones significativamente más altas y con un tamaño del efecto medio en el rasgo sociabilidad-extraversión y sus facetas emociones positivas y calidez social, y en la faceta actividad general; iii. puntuaciones significativamente más bajas y con un tamaño del efecto grande para ansiedad de futuro. Las entrevistas en profundidad muestran una gran valoración de la práctica del daimoku como propiciador de cambios positivos en términos de autoestima, ansiedad, estado de ánimo, sociabilidad, actividad y temporalidad subjetiva. Las creencias budistas y la comunidad son también valoradas positivamente.
Пространственное распределение суммарного испарения растительной поверхности с использованием модели SEBAL и наземных метеорологических измерений
Authors: Dobrokhotov A. V.
Published: March 2023

Предложен комплексный метод определения пространственного распределения суммарного испарения на растительной поверхности. Метод основан на энергобалансовой модели SEBAL с использованием данных дистанционного зондирования в оптическом и тепловом диапазонах съемки и наземных метеорологических измерениях. Для апробации метода в 2016 г. были проведены полевые эксперименты на кормовых травах в пос. Бугры Ленинградской области (60°05'09" с. ш., 30°25'34" в. д.) с применением данных спутника LandSat-8 и автоматизированного мобильного полевого агрометеорологического комплекса (АМПАК).
Accompanying phenomena during casting of aluminium alloys
Authors:   University of Žilina, Galčík Marek , Brůna Marek , Medňanský Martin
Published: March 2023

An oxide layer is formed on the surface of a molten aluminium alloy when it is exposed to the surrounding atmosphere. The oxide layer on the surface of the melt is not harmful. The problem occurs when it is entrained into the melt volume and solidifies in the casting. The paper deals with the formation of the oxide layer, its types and the formation of a double oxide layers.
Lean management, lean principles, lean manufacturing
Authors:   University of Žilina, Litvaj Ivan
Published: March 2023

My article is focused on one main topic, the topic of lean management. I describe lean management in the article, in basic definitions, principles, and contexts. I do not deal in detail with individual elements and aspects of lean management in the article, because that was not the goal of the article. I define lean management, and its meaning in business practice, further I describe the principles of lean management and lean production.
Using the cold metal transfer (CMT) method for wire arc additive manufacturing (WAAM) applications
Authors:   University of Žilina, Frátrik Martin , Mičian Miloš
Published: March 2023

This work deals with the possibilities of applying the MAG-CMT welding method for the purpose of wire arc additive manufacturing (WAAM). The WAAM method was operated using an industrial robot and welding device for MAG welding. The aim of the work was to compare three methods of laying layers in order to assess their mutual mixing. Cross-shaped perpendicular walls that were mutually connected as of the welded component were assessed. The geometry, macrostructure, and total operating costs of individual variants were evaluated. The result was the determination of the most accurate and most economical variant of laying layers.
Analýza pozdĺžneho zaťaženia kontajnera so stenami vyrobenými zo sendvičových panelov
Authors:   University of Žilina, Vatulia Glib , Gerlici Juraj , Lovska Alyona , Krasnokutskyi Yevhen
Published: March 2023

The article presents the results of determining the longitudinal dynamic load of a container of standard size 1CC with sandwich panel walls. A mathematical model was developed that takes into account the longitudinal load of a container placed on a platform wagon during a displacement collision. The use of sandwich containers as components was found to contribute 10 % to the active container design in the longitudinal plane compared to the typical design. A calculation of the strength of the container was carried out. At the same time, the maximum voltages are 18.6 % lower than permissible. Conducted research in preparation for the creation of recommendations for the design of modern modular vehicle structures and increasing the production of the transport industry
Corrosion behavior of the AlSi5Cu2Mg alloy with varying Zr addition
Authors:   University of Žilina, Širanec Lukáš
Published: March 2023

The aim of this paper was to analyze the impact of varying zirconium additions (0.05; 0.10; 0.15 and 0.20 wt. % Zr) on corrosion behavior of the AlSi5Cu2Mg aluminum alloy. Potentiodynamic polarization corrosion tests in 3.5 % NaCl solution demonstrated that the addition of Zr improved the thermodynamic corrosion stability of the AlSi5Cu2Mg alloy by shifting the corrosion potential to more positive values for all as-cast samples. The addition of Zr to the as-cast alloys also improved corrosion kinetics by lowering the corrosion current density.
Návrh programu pre automatické vyhodnotenie obrazu výtlačku zosnímaného CCD kamerou
Authors:   University of Žilina, Pijáková Katarína , Štalmach Ondrej , Sága Milan , Vaško Milan
Published: March 2023

The aim is to create a program for the automatic evaluation of hardness from a series of images taken by a CCD camera. We will present the different functions of the proposed program. In the first step, we created an algorithm that selects the image with the most suitable sharpness from a series of images of different sharpness. In the second step, we created an algorithm that evaluated the imprint area on the selected image, from which it computed the resulting hardness. We then incorporate the algorithms into a single resulting program. We compare he measurements of the program with measurements at the University of Žilina and on a manual V 10/HT instrument.
Prehľad doterajšieho výskumu výroby harmonického prevodu
Authors:   University of Žilina, Kepeň Harachová Daniela , Maláková Silvia , Sivák Samuel
Published: March 2023

Harmonic Drive, also called Harmonic Drive gear, harmonic gear, or strain wave gearing, mechanical speed-changing device, invented in the 1950s, that reduces the gear ratio of a rotary machine to increase torque. It operates on a principle different from that of conventional speed changers. Harmonic drive products are unique precision speed reducers playing important roles in robots, semiconductor manufacturing systems, factory automation equipment and furthermore, in aerospace equipment that may convey our human dreams.
Tvárnenie v hydraulickom prostredí explóziou
Authors:   University of Žilina, Moravec Ján
Published: March 2023

The article describes and analyses the issue of explosive sheet metal forming in a hydro environment. In the introductory part, the necessary theoretical and technological knowledge is presented, which is necessary as a theoretical introduction to the issue. The explosion process in a liquid environment is described. The reflection from the surface and bottom of the tank used in the experiment is important. The paper only offers a view of the theoretical side of the process, because the legislative framework does not yet allow direct experimental work to be carried out, which must be done by a certified specialist in the handling of explosives.
Конструктивные особенности современных горных велосипедов, часть 2.
Authors:   University of Žilina, Дижо Ян , Блатницкий Мирослав , Васильевич Ищук Вадим , Молнар Денис , Солчанский Себастьян , Плайдичко Борис
Published: March 2023

Cycling and bicycles become still more and more popular. People transport themselves to the work, to the school, to shops and other by bicycles. Bicycles represent quite effective transport means regarding to production of gas emissions, noise emissions together with better possibilities to leave them near to wanted facilitates. However, bicycles are suitable for recreations. Currently, trips to nature are very popular. For safe cycling, it is appropriate to use a proper bicycle. There are terrain bicycles, which have the design customized for riding in the heavy-road conditions. This article includes an introduction to the topic of design modern terrain bicycles, their main types and description of their basic characteristics.
A VULNERABILIDADE DO IDOSO EM SITUAÇÃO DE RUA E A VIOLAÇÃO DA DIGNIDADE HUMANA E DOS DIREITOS DA PERSONALIDADE DIANTE DA PRECARIEDADE DAS POLÍTICAS PÚBLICAS DE PROMOÇÃO HUMANA
Authors: Medina Andrecioli Sabrina , GOMES RODRIGUES FERMENTÃO CLEIDE APARECIDA
Published: March 2023

A vida da população em situação de rua nas cidades é complexa e multifacetada, tendo em vista que abrange diferentes grupos viven­do em grande precariedade. Ao mesmo tempo em que ocorre o envelhecimento da população, as condições de vulnerabilidade desse grupo associado ao empobrecimento podem levar ao aumento do número de idosos em situação de rua. O idoso que vivencia a realidade das ruas representa a radicalidade do desamparo diante da carência física, econômica e psíquica, e coloca a céu aberto aquilo que é negado por grande parte da sociedade. O objetivo da pesquisa será identificar quem é o idoso hipervulnerável em situação de rua e as circunstâncias que o colocam nessa condição e justificam a necessidade de uma tutela diferenciada para a proteção de seus direitos da personalidade. A análise será a partir da verificação da situação de vulnerabilidade dessa parcela da população e a importância da efetividade de políticas públicas para à garantia da dignidade da pessoa humana. Para tanto, se vale do método hipotético-dedutivo, por meio de pesquisa documental, descritiva e exploratória para a reflexão sobre o aumento expressivo da população em situação de rua, especificamente os idosos que vivem essa realidade vulnerável e de exclusão.
UAV-assisted Multi-tier Computing Framework for IoT Networks. (c2022)
Authors:   ,   Lebanese American University, Tout Abeer
Published: March 2023

Next-generation wireless networks are expected to support a massive amount of Internet of Things (IoT) devices in delivering a wide range of novel resource intensive applications. IoT devices, despite their enhanced capabilities, fall short of meeting the computational requirements of these applications within a strict deadline. This thesis leverages a hierarchical computational model where IoT devices offload their computational tasks to a number of unmanned aerial vehicles (UAVs) that can be deployed in a way to establish strong Line-of-Sight (LoS) links. Being equipped with computational resources, UAVs process part of the tasks within the set time threshold while the other tasks are transferred to edge and cloud servers for potential processing. This work aims at optimizing the number and position of deployed UAVs, IoT-to-UAV association, resource allocation, and task offloading to UAVs, edge servers, and the cloud, while ensuring various system constraints. The problem is formulated as a mixed integer programming problem and solved using Successive Convex Approximation. An efficient solution is then proposed to decompose the main problem into two subproblems that are solved iteratively. The first subproblem minimizes the number of IoT clusters and positions a UAV to serve each cluster while the second subproblem maximizes the percentage of admitted tasks using the resulting number of UAVs determined by the first subproblem. As long as not all devices are fully served, an additional UAV is introduced and the two subproblems are solved repeatedly. The proposed decomposition solution has been evaluated as a function of various system parameters and application use cases to show optimized performance and high scalability.
Penggunaan Media Pagarbilang untuk Meningkatkan Hasil Belajar Membandingkan Pecahan Berpenyebut Beda
Authors: Istafada Istafada
Published: March 2023

Rendahnya pemahaman konsep matematika yang diterima siswa akan menyebabkan hasil belajar matematika siswa juga rendah. Menggunakan media pembelajaran yang tepat dapat membantu siswa mempelajari konsep matematika dengan mudah. Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa dalam materi membandingkan pecahan yang berpenyebut beda dengan menggunakan media pagarbilang. Penelitian ini menggunakan penelitian tindakan (action research) sebanyak dua siklus. Ada 4 tahap dari setiap siklusnya yaitu perencanaan, tindakan, pengamatan, dan refleksi. Hasil penelitian ini menunjukkan bahwa penggunaan media pagarbilang dapat meningkatkan hasil belajar siswa pada membandingkan pecahan yang berpenyebut beda, yaitu rata-rata 79,42 menjadi 85,28  dan ketuntasan belajar siswa meningkat dari 86,11% menjadi 94,44%.
Exportaciones de productos no tradicionales en el Perú en una estructura VAR multivariado
Authors:   Universidad Nacional del Altiplano, Puno, Perú, Laurente Blanco Luis Francisco , Marín Bedoya Ayde ,   Presidencia del Consejo de Ministros (PCM), Lima, Perú
Published: March 2023

Between 2000 and 2017, non-traditional exports in Peru have shown an accelerated growth mainly explained by the agricultural sector, followed by the fishing, textile, chemical and steel-metallurgical sectors, presenting a surprising growth of 470.95% in this period. The objective of the study is to find the macroeconomic determinants of exports of non-traditional products to Peru through the search of the long-term relationship, using the Johansen methodology and the implementation of the Error Correction Vector Model to find the short dynamics and long term for exports of non-traditional products. The results show that the determinants of exports are US gross production, bilateral real exchange rate index and export index, which have a cointegration relationship. Finally, it was found that gross US production has a positive influence, the bilateral real exchange rate index has a negative influence and the export price index has a negative influence on exports of non-traditional products in Peru.
Factores socioeconómicos y ambientales que influyen en la inseguridad alimentaria de hogares en los Andes del Perú
Authors:   Universidad Nacional del Altiplano, Puno, Perú, Arpi Mayta Roberto , Paredes Mamani Rene Paz
Published: March 2023

The objective of the study was to determine the social, economic and environmental factors that influence the food insecurity of households located in the Andes of Peru. Using the database of the National Household Survey of 2018 produced by the National Institute of Statistics and Informatics of Peru and estimating a logistic regression model, the results show that food insecurity is directly related to household size. It was also found that there is greater food insecurity in homes where there are children under the age of 19, homes where the head of the household is male, homes with overcrowding, and in those homes that are located in the northern highlands or central highlands of Peru and, likewise, food insecurity is inversely related to household income, the number of household income recipients, and non-food expenses. Finally, there is less food insecurity in homes where the head of household has an occupation, homes that access school social food programs, homes that access public water and electricity services, and homes that reside in the rural highlands.
Sex-based epidemiological and immunovirological characteristics of people living with HIV in current follow-up at a tertiary hospital: a comparative retrospective study, Catalonia, Spain, 1982 to 2020
Authors: Toyos Sara , Berrocal Leire , González-Cordón Ana , Inciarte Alexy , de la Mora Lorena , Martínez-Rebollar María , Laguno Montserrat , Fernández Emma , Ambrosioni Juan , Chivite Iván , de Lazzari Elisa , Blanco José Luis , Martínez Esteban , Miró José M , Mallolas Josep , Torres Berta
Published: March 2023

Background

Epidemiological and immunovirological features of people living with HIV (PLWH) can vary by sex.

Aim

To investigate, particularly according to sex, characteristics of PLWH who consulted a tertiary hospital in Barcelona, Spain, in 1982–2020.

Methods

PLWH, still in active follow-up in 2020 were retrospectively analysed by sex, age at diagnosis, age at data extraction (December 2020), birth place, CD4+ cell counts, and virological failure.

Results

In total, 5,377 PLWH (comprising 828 women; 15%) were included. HIV diagnoses in women appeared to decrease from the 1990s, representing 7.4% (61/828) of new diagnoses in 2015–2020. From 1997, proportions of new HIV diagnoses from patients born in Latin America seemed to increase; moreover, for women born outside of Spain, the median age at diagnosis appeared to become younger than for those born in Spain, with significant differences observed in 2005–2009 and 2010–2014 (31 vs 39 years (p = 0.001), and 32 vs 42 years (p < 0.001) respectively), but not in 2015–2020 (35 vs 42 years; p = 0.254). Among women, proportions of late diagnoses (CD4+ cells/mm3 < 350) were higher than men (significantly in 2015–2020: 62% (32/52) vs 46% (300/656); p = 0.030). Initially, virological failure rates were higher in women than men, but they were similar in 2015–2020 (12% (6/52) vs 8% (55/659); p = 0.431). Women ≥ 50 years old represented 68% (564/828) of women actively followed up in 2020.

Conclusions

Women still have higher rates of late HIV diagnoses than men. Among currently-followed-up women, ≥ 50 year-olds, who need age-adapted care represent a high percentage. Stratifying PLWH by sex matters for HIV prevention and control interventions.
A Framework to Enhance Graduate Employability
Authors: Underdahl Louise , Akojie Patricia , Agustin Magabo Myrene , Rae Reed Rheanna , Haynes Shawishi , Marzano Maureen , Navarro Mar , S Patterson Margo
Published: March 2023

Aim/Purpose: Alignment of academic curricula and employer needs is widely discussed yet implementation lags. Research on EdD curricula has universality for other academic programs and may catalyze pedagogical innovation to promote employability in other disciplines.

Background: This study contributes evidence-based data to strengthen career relevance of academic programs, align curriculum content with industry requirements, prepare students for the workforce, and improve job placement rates, defined as degree-related employment.

Methodology: In this mixed method study, current Doctor of Education (EdD) students and employers of Doctor of Education (EdD) graduates commented on the alignment of the EdD curriculum with industry-specific needs.

Contribution: Results may promote corporate and academic partnership to optimize alignment of curricula and industry needs.

Findings: Partnerships between educators and employers in developing curricula can bridge the industry specific skills gap and enhance students’ understanding of the professional workplace and capacity to communicate, be empathetic, and solve problems.

Recommendations for Practitioners: Educators can strengthen capacity for the adaptability and continuous learning associated with mastering new skills as technology evolves. Employers can provide skilling, reskilling, and upskilling opportunities, offer job shadowing and internships, and participate in collaborative research.

Recommendation for Researchers: Researchers can develop pedagogy targeting interpersonal, communication, participative, and organizational competencies.

Impact on Society: Improving graduate employability creates positive outcomes for graduates, educators, employers, and the global economy.

Future Research: Perceived employability is a powerful motivator. Research is needed to reframe curricula to synthesize discipline-specific skills with generic skills, such as teamwork, communication, and critical thinking, that enhance students’ self-confidence and self-perceptions of employability
An analysis of misoprostol effectiveness in second trimester pregnancy terminations
Authors: Ak Mehmet , Dolanbay Mehmet , Kütük Mehmet Serdar
Published: March 2023

Background/Aim: Misoprostol is frequently used as a single agent in pregnancy terminations. However, it increases the risk of uterine rupture in patients who have had previous uterine surgery and terminations due to stillbirths. Therefore, it is used with concern by clinicians. The aim of this study was to evaluate the clinical features of the groups that responded and did not respond to termination treatment with misoprostol in a tertiary center and to investigate its efficacy and safety.
Methods: The study design was comprised of a retrospective cohort study. A total of 114 second trimester pregnancies (between 13-24 weeks gestational age) were included in the study. These pregnancies were indicated for termination based on the prenatal diagnosis unit for fetal or maternal causes. According to the International Federation of Gynecology and Obstetrics (FIGO) directions, misoprostol was applied in the following dosages: for 13-17 weeks gestational ages, one tablet per 6 hours; for 18-26 gestational ages, ½ tablet per 6 hours; and for other indications 2 tablets per 3 hours were administered. If the patient had had a previous cesarean operation, all doses were halved. After the first 24 hours, the percentage and demographics results, such as age, body mass index (BMI), gravida, number of cesareans, number of curettages, cervical lengths, BISHOP scores, gestational age, amniotic fluid index, and fetal cardiac beat of the patients with miscarriage, were recorded.
Results: The number of cases resulting in miscarriage within 24 hours were 84 (73.7%) and within 48 hours were 14 (12.2%). The total of misoprostol doses used were 8 tablets of 200 mg, mean time until the complete abortion was 17 hours. Sixteen patients required additional treatment, of whom four required Foley catheterization, five required D&E, seven required resting, and no one required a hysterectomy. Uterine rupture occurred in two patients who needed laparotomic surgery. The maternal age (P=0.340), BMI (P=0.790), gravida (P=0.270), previous cesarean history (P=0.390), previous curettage number (P=0.520), cervical length (P=0.380), Bishop score (P=0.190), gestational age (P=0.072), amniotic fluid index (P=0.470) and presence of fetal cardiac beat (P=0.350) were similar between groups
Conclusion: Our results indicated that misoprostol is a safe, useful, and effective treatment option for second trimester medical terminations. Caution should be exercised in its use in patients with a history of uterine surgery.
The Motor Gesture Between Physical Exercise, Expressiveness and Communication
Authors: Chirazi Marian
Published: March 2023

They all have in common physical exercise. The art the dancer, the gymnast or the skater have reached is the result of learning, of continuous practice of a large series of routines intended to improve their understanding and abilities to express themselves. As anaesthetic attitude of the body in movement, dance seems to define most concretely body capacity to reveals itself through harmonious, expressive, supple, light and precise movement expressing certain states as a result of the relationship between body andpsyche. But valuation of individual expressiveness depends on the wholeness of one’s motor skills, their development level and his psychological and intellectual qualities. Consequently, physical exercise can stand for a form of nonverbal communication due tothe powerfulness of the message transmitted and can determine different levels of expressiveness of the whole body.
Maintaining the Motor Capacity of Military Firefighters Through the Football Game
Authors: Loluță Adrian Gabriel
Published: March 2023

The aim of this research was to identify new ways of attracting and stimulating the body to maintain the motor capacity of operational personnel in professional structures for emergencies, namely military firefighters using the game of football. The experiment tookplace on duty and had as subjects about 40 military personnel, to which the tactics and technique specific to the game of football were applied. After completing the motor training performed and carried out on the synthetic sports field inside the unit, as well as when the weather conditions are unfavorable or in the cold season, respectively in the car garage, we can say that the staff on duty keeps theirs’s motor capacity at the normal parameters for the successful completion of the missions entrusted to him through the game of football.