bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aktuelle Herausforderungen bei der Implementierung von Self-Service Business Intelligence
Authors: Fischer Felix B. , Burger Anton A. , Gehling Benedikt 
Published: March 2023

ZusammenfassungIm Rahmen von Self-Service Business Intelligence (SSBI) sollen Aufgaben zur entscheidungsorientierten Informationsgewinnung aus Daten von Power Usern auf Business User übertragen werden. Damit will man die Entscheidungsgeschwindigkeit, Eigenständigkeit und Flexibilität der Business User erhöhen. Obwohl das Konzept seit über zehn Jahren existiert, wird es bisher von einer Minderheit der DACH-Unternehmen angewandt. Insofern stellt sich die Frage, wie die Implementierung des Konzepts gelingen kann und welche Herausforderungen dabei bestehen. Der vorliegende Beitrag ergänzt den aktuellen Forschungsstand zu den Implementierungsherausforderungen mit Hilfe von Experteninterviews und geht dabei auch auf neuere Entwicklungen im Vergleich zum bisherigen Forschungsstand wie z. B. auf SSBI mit Data Lakes ein. Zudem werden konkrete Implementierungsoptionen abgeleitet, die die Datensituation im jeweiligen Unternehmen berücksichtigen.
Agentenbasierte Modellierung und Simulation im Pandemiemanagement
Authors: Hälterlein Jens 
Published: March 2023

Mathematical models and computer simulations play a crucial role in the context of the COVID-19 crisis for knowledge about the possible course of the pandemic and for appropriate policy decisions. The paper presents results from an ethnographic study of a government-funded R & D project dealing with agent-based modeling and simulation (ABMS) in the context of pandemic management. Based on the assumption that the use of computer simulations in pandemic management is not only a means to an end for political or epidemiological goals but also plays a significant role in determining which goals and strategies appear politically legitimate, the paper reconstructs how insights into the pandemic are generated in ABMS and specifically in the researched project and made accessible for decision-making.
Efficiency of CFRP torsional strengthening technique for L-shaped spandrel reinforced concrete beams
Authors: Ayaad Noor , Oukaili Nazar 
Published: March 2023

Abstract
The present study aims to get experimentally a deeper understanding of the efficiency of carbon fiber-reinforced polymer (CFRP) sheets applied to improve the torsional behavior of L-shaped reinforced concrete spandrel beams in which their ledges were loaded in two stages under monotonic loading. An experimental program was conducted on spandrel beams considering different key parameters including the cross-sectional aspect ratio (i.e., web height/web thickness), and the availability of the CFRP strengthening system. The ledge of the spandrel beams was exposed during testing to a very high eccentric load, which was transferred to the web of the spandrel beam causing high shear, torsion, and bending moments. Consequently, the applied load resulted in in-plane and out-of-plane deformations of the web accompanied by flexural and shear cracks. This article demonstrates the advantage of using CFRP sheets to strengthen the mentioned members. The applied CFRP sheets increased the failure torsional load by about 37% compared to the identical L-spandrels without strengthening. The outcomes indicate that using CFRP sheets show improvement in restricting the deflections and rotation of L-spandrels due to increasing spandrel stiffness. The reduction in the degree of rotation attained more than 33% in comparison to the spandrel beams without strengthening. The experimental program confirmed the applicability of the proposed strengthening technique for compacted and slender L-shaped spandrel-reinforced concrete beams.
Geometric influence on the net magnetic moment in LaCoO3 thin films
Authors: Joshi T. , Belanger D. P. , Tan Y. T. , Wen W. , Lederman D. 
Published: March 2023

AbstractThe different magnetic behaviors of LaCoO$$_3$$

3

films grown on LaAlO$$_3$$

3

and SrTiO$$_3$$

3

substrates are related to the Co–O–Co bond angles and the constraints imposed on the Co–O bond lengths by the substrate geometries. The observed magnetic behavior is not consistent with ferromagnetism. Rather, long-range antiferromagnetic order occurs below $$T \approx 90$$

T
≈
90

K when the Co–O–Co bond angle is greater than 163$$^\circ$$

∘

, consistent with the behavior of bulk and nanoparticles forms of LaCoO$$_3$$

3

. A LaAlO$$_3$$

3

substrate prevents magnetic long-range order at low temperatures near the film–substrate interface and collinear antiferromagnetic sublattices away from the interface. At low temperatures, the antiferromagnetically ordered sublattices are non-collinear in films grown on SrTiO$$_3$$

3

substrates, leading to a significant net moment. The net moment is controlled by the geometry imposed by the substrate upon which the LaCO$$_3$$

3

film is grown.
Graphical abstract
Solid solubility in the CeTi2O6–CeTiNbO6 system: A multi-element X-ray spectroscopic study
Authors: Dixon Wilkins M. C. , Stennett M. C. , McCloy J. S. , Corkhill C. L. 
Published: March 2023

AbstractIn order to investigate the limits of solid solubility between Ce-brannerite (CeTi2O6) and Ce-aeschynite (CeTiNbO6), materials in the system CeTi2–xNbxO6 have been produced by a solid state route and characterised by XRD and XANES at the Ce L3-, Ti K- and Nb K-edges, including Rietveld method refinements and linear combination fitting. Significant solid solubility was observed at the brannerite end, with near-single-phase brannerite observed for x = 0.2, 0.4, and only minor aeschynite observed where x = 0.6 which was identified as exceeding the limit of solubility of Nb. All Nb was present as Nb5+, with the substitution of Nb5+ into the brannerite structure permitted by the reduction of the same fraction of Ce4+ to Ce3+. This work expands the crystal chemistry of the titanate brannerites, with Ce-site oxidation states of less than 4+ being possible where sufficient charge-balancing species are available on the Ti-site.
Graphical abstract
Use of brick dust to optimise the dewatering process of hydrated lime mortars for conservation applications
Authors: Su-Cadirci Tugce Busra , Ince Ceren , Calabria-Holley Juliana , Ball Richard J. 
Published: March 2023

AbstractThe impact of dewatering on lime mortars modified using brick dust was studied, as it is of particular importance in conservation applications. Dewatering takes place when freshly mixed mortars come into contact with a porous substrate, such as brick or stone, during on site construction. Since the dewatering process between the mortar and its substrate can modify the mortar properties, understanding the dewatering process enables pozzolan-modified hydrated lime mortars to be optimised for the masonry units being bonded. Evaluation of the water transport kinetics on brick dust—hydrated lime binder systems demonstrated their more water releasing behaviour. Investigations of non-dewatered and dewatered specimens in the volume ratio of 1:1:2 (lime:brick dust:sand) showed that the addition of brick dust to lime mortar increased dewatering, which in turn led to greater compressive strength, carbonation depth, decreased porosity and depth of water penetration. These properties are of great importance in the conservation of historic masonry, as mortars that are too strong or possess low permeability can accelerate degradation. This study will enable identification of the most suitable mix designs thereby increasing the durability and prolonging the life of historic masonry.
The effect of waste-expanded perlite on alkali activation of ground granulated blast furnace slag
Authors: Kucharczyk Sylwia , Pichór Waldemar 
Published: March 2023

AbstractThe purpose of this study was to evaluate the possibility of using ground waste-expanded perlite (WP) as a sustainable replacement for ground granulated blast-furnace slag (GGBFS) precursor in alkali-activated systems. The nature and amount of hydration products, microstructure, and compressive strength development were investigated in mixtures where GGBFS was substituted with 10, 20 and 40% by weight of WP and activated by two alkali activators: sodium carbonate and sodium hydroxide. The results show that WP can be successfully used as a partial replacement for GGBFS in alkali-activated materials. Activation by the Na2CO3 solution was more profitable in terms of compressive strength than NaOH, as well as the amount of water bound in the hydration products was higher. Substitution of GGBFS with 20 wt.% of WP activated with sodium carbonate resulted in a compressive strength of 93 MPa at 90 days of hydration while for the equivalent sample activated by sodium hydroxide, 29 MPa. Further incorporation of WP into Na2CO3 activated systems resulted in a reduction in performance development, especially at the early age. In addition to C–S–H, hydrotalcite, and three different types of carbonates in the samples activated by NaOH solution, a rich in sodium C(–N)–S–H was found.
Frecuencia de prediabetes y factores de riesgo en pobladores de un distrito de La Libertad, Perú 2021
Authors: Mendo-Vásquez Luis M. , León-Jiménez Franco E. 
Published: March 2023

Objetivo: Determinar la prevalencia de prediabetes y sus factores de riesgo en los pobladores del sector Los Laureles del distrito El Porvenir- La Libertad durante el año 2021. Material y Métodos: Estudio descriptivo transversal censal que incluyó a 50 personas mayores de 25 años durante los meses de julio-diciembre del 2021, a quienes se les aplicó un cuestionario estructurado, se les tomó la presión y se les solicitó una muestra de sangre para dosaje de glicemia en ayunas y perfil lipídico. Resultados: La prevalencia de prediabetes fue 20%, la de Diabetes 16,9% y la frecuencia de factores de riesgo asociados a Prediabetes fueron: familiar de primer grado con Diabetes: 26%, Sobrepeso 18%, Obesidad 10%, Hipercolesterolemia 30%, niveles de LDL aumentado 28%, niveles bajos de HDL 16% y hipertrigliceridemia 28% y 22% Hipertensión arterial. Conclusión: La prevalencia de prediabetes en este asentamiento humano fue similar a lo hallado en otras investigaciones. La frecuencia de antecedentes familiares de DM2, colesterol LDL elevado, obesidad, sobrepeso e hipertensión arterial, fue menor en comparación con otros estudios; la frecuencia de hipercolesterolemia y hipertrigliceridemia fue mayor a lo revisado en otras investigaciones. Finalmente, sólo se encontró similitud en la cifra de colesterol HDL disminuido con otros estudios.
Predictors of dialysis and death among paediatric renal disease patients: A 14-year retrospective study at Korle Bu Teaching Hospital, Ghana.
Authors: Osei George Nkrumah , Worae Emmanuel , Ghartey Betty Effie Adoko , Okyere Perditer , Botchway Felix , Djonor Sampson K. , Ephraim Richard K D 
Published: March 2023

Abstract
Introduction: Paediatric nephropathy, a condition associated with significant morbidity and mortality, is increasing in developing countries. Data on paediatric renal diseases are insufficient in Ghana despite the risk it poses. This study assessed the pattern, spectrum, outcome, and predictors of dialysis and death among paediatric renal disease patients at Korle Bu Teaching Hospital (KBTH), Accra, Ghana.
Methodology: Among children aged 0-17 years on admission at the Child Health Department of KBTH, a retrospective hospital-based study was conducted. Demographic characteristics, clinical data including type, cause, duration, and symptoms of renal diseases, laboratory data (haemtological and biochemical), information on dialysis and treatment outcome were obtained from their records. Data were analyzed accordingly using STATA software version 15.1.
Results: A total of 353 children with renal diseases were seen during the study period (2009-2022) (mean age of 5.91 ±3.99), with 217(62.18%) being males. The most common renal diseases were nephrotic syndrome 141(39.94%), acute kidney injury (AKI) 87(24.65%) and acute glomerulonephritis 47(13.31%). Others included polycystic kidney disease (0.85%), lupus nephritis (0.57%), and others (ureterostomies, bladder calculus, and dilated ectopic renal pelvis)(1.70%). Idiopathic causes (26.35%) were the major cause of renal diseases followed by intravascular haemolysis (20.11%), infection (18.70%), and hypertension (17.00%). Swelling (76.88%), facial puffiness (39.02%), fever (34.97%), and abdominal distension (24.57%) were the most common symptoms. A death prevalence of 16.43% resulting mostly from AKI (5.95%), acute on chronic kidney disease (4.25%), and CKD (2.55%) was observed at KBTH whilst 7.37% were on dialysis. Predictors of dialysis included female gender, high urea levels and acute on chronic kidney disease whilst being admitted for a month or less and more than 5 years, high white blood cell count (WBC), acute on chronic kidney disease, and renal impairment were significant predictors of death among children with renal diseases.
Conclusion: Paediatric renal diseases at KBTH were dominated by nephrotic syndrome and AKI. High WBC count, acute on chronic kidney disease, and renal impairment were significantly associated with death among children with renal diseases. Therefore, much attention should be paid to these parameters during their care.
ASAPs: Asynchronous Hybrid Self-Reconfiguration Algorithm for Porous Modular Robotic Structures
Authors: Bassil Jad , Piranda Benoît , Makhoul Abdallah , Bourgeois Julien 
Published: March 2023

Abstract

Programmable matter refers to material that can be programmed to alter its physical properties, including its shape. Such matter can be built as a lattice of attached robotic modules, each seen as an autonomous agent with communication and motion capabilities. Self-reconfiguration consists in changing the initial arrangement of modules to form a desired goal shape, and is known to be a complex problem due to its algorithmic complexity and motion constraints. In this paper, we propose to use a max-flow algorithm as a centralized global planner to determine the concurrent paths to be traversed by modules through a porous structure composed of 3D Catoms meta-modules with the aim of increasing the parallelism of motions, and hence decreasing the self-reconfiguration time. We implement a traffic light system as a distributed asynchronous local planning algorithm to control the motions to avoid collisions. We evaluated our algorithm using VisibleSim simulator on different self-reconfiguration scenarios and compared the performance with an existing fully distributed synchronous self-reconfiguration algorithm for similar structures. The results show that the new method provides a significant gain in performance.
Cognitive Modeling of Information Support for Game-Based Automated Learning
Authors: Khalin Y. A. , Katykhin A. I. , Zinkin S. A. , Shilin A. A. 
Published: March 2023

Purpose of research. The main goal of this work is to increase the efficiency of automated game learning based on cognitive modeling. Based on the methodology of system analysis and cognitive modeling of weakly structured situations, the structure of a gaming automated training complex is proposed, which can be used in training personnel in various subject areas. In our case, staff training was simulated in stereotypical and non-stereotypical situations.Methods. This work is based on the general provisions of systems theory and system analysis, mathematical graph theory (which is based on cognitive modeling). The main tool of cognitive modeling was the construction of fuzzy cognitive maps of Silov. A modification of the algorithm for calculating the main system indicators of a fuzzy cognitive map was proposed. Game modeling, based on business games, was used for automated learning. The concept of an operational game was introduced, then modeling of the development of some unfavorable situation was carried out using fuzzy cognitive maps..Results. he main result of this work is the method of cognitive modeling of information support for game-based automated learning. Based on the developed methodology, a game simulation simulation of the operational game "House Fire" was carried out, which was based on the construction of a fuzzy cognitive map, for which the main quantitative system indicators of mutual influence, consonance and dissonance were calculated.Conclusion: the developed methodology allows for game modeling of unfavorable (including emergency) situations, which in the future will ensure adequate behavior of students in real situations.
Method for Assessing and Forecasting Economic Risks of an Enterprise Based on Data Mining
Authors: Khalin Y. A. , Kriushina Y. A. , Zinkin S. A. , Shilin A. A. 
Published: March 2023

Purpose of research. The main purpose of this work is to improve the quality and efficiency of managerial decisionmaking based on the development of a method for assessing and forecasting economic risks of an enterprise. This method is based on data mining technology.Methods. The paper uses methods of panel data processing and analysis, for which a mathematical model for predicting the level of competitiveness of an enterprise was built, as well as a model for predicting economic risks of an enterprise based on combining several methods of data mining: clustering of merging panel data for assessing economic risks of an enterprise and the method of merging fuzzy correlation for statistical analysis of panel data.Results. As a result of the application of the developed method, quantitative assessments of the level of competitiveness and economic risks of the enterprise were obtained. Based on the obtained quantitative assessments of the level of competitiveness and the level of economic risk, a cluster analysis of enterprises in some industry was carried out. The developed methods have high accuracy in predicting economic risks of enterprises, improve the capabilities of data mining and combining information about economic risks of enterprises, which increases the competitiveness of enterprises.Conclusion. A method of forecasting economic risks of an enterprise based on data mining technology has been developed. Weighted estimates of spatial features of panel data were obtained, which allow to obtain integral estimates of the economic risks of the enterprise and the level of competitiveness of the enterprise. A model for the analysis of fuzzy rules of semantic features of panel intelligent data analysis of the assessment of economic risks of the enterprise is proposed. The analysis shows that the developed method has high accuracy and better protection against interference when predicting data.
Thermal Condition in the Channels of Plate Heat Exchangers
Authors: Elistratova Yu. V. , Seminenko A. S. , Uvarov V. A. , Minko V. A. 
Published: March 2023

Equipping heat points with plate-type heat exchangers is an integral structural element of the 3rd generation heat and power network and a component of the reliability of the heat supply system as a whole. It has been established that the optimization calculations of heat exchangers of this type are difficult due to the absence of dependences on heat transfer and hydraulic resistance between the channels in the structural space of the heat exchanger.Purpose of research. To clarify the method of calculating plate heat exchangers, excluding the equality of thermal and hydraulic conditions from the generally accepted assumptions.Methods. The research methodology is based on the use of the law of conservation of mass in order to determine the temperature parameters of working fluids in each channel. The solution of this problem is proposed in the form of a system of equations, each of the equations of which characterizes the thermal balance of the channel under consideration. A computer model of the heat exchanger is constructed in order to conduct a numerical study of the thermal regime of the heat exchanger.Results. It is indicated that as an assumption in the well-known mathematical model for calculating the thermal regime of a plate-type heat exchanger, the condition of equal distribution of fluid flows between channels is accepted. This restriction leads to equalization of liquid temperatures in each channel. Taking into account the geometric arrangement of the channels, the excess of the final temperature of the heating and heated coolant in the first and last channels with respect to known data is up to 10%. The results of the study confirm the hypothesis of uneven heating of the coolant along the length of the plate package due to the uneven flow distribution between the channels.Conclusion. The results of analytical calculation and modeling in the SolidWorks environment of the temperature regime in the channels of a plate-type heat exchanger indicate a significant influence of the geometric arrangement on the thermal regime in the channels. The formulated provisions of the mathematical description of the unevenness of the thermal regime of heat exchange channels, taking into account the location of the plates, are recommended to be used when improving the design parameters of plate-type heat exchangers.
Research of the Properties of the Breadth-First Search Algorithm for Finding the Movement Route of Robots
Authors: Emelianov S. G. , Bobyr M. V. , Kryukov A. G. 
Published: March 2023

Purpose of research. The research presented in this article is aimed at improving the speed of finding a path for the movement route of robots. The scientific novelty is the obtained correlation of time and field size.Methods. To find the path in the maze, the depth-first search and breadth-first search algorithms were used, the basis of which is the cyclic processing of adjacent previously unvisited graph vertices. Performance is estimated in terms of the speed of program code execution on prepared samples. Scientific novelty was obtained by studying the influence of map sizes on the performance of depth-first and breadth-first search algorithms.Results. A software implementation of breadth-first and depth-first search algorithms has been developed. The article provides a more detailed description of the breadth-first search algorithm in the form of pseudo and program codes, which are based on the while loop, where the queue of checked graph vertices is processed. Based on the evaluation of the speed of the found path, it was concluded that the breadth-first search is not the fastest. Based on the assessment of the influence of various factors on the speed of the algorithm, it was concluded that an increase in the size of the field, a decrease in the number of obstacles and a distance between the starting and final points increases the execution time of the algorithm.Conclusion. The breadth-first search algorithm and its software implementation were presented. In the course of experimental studies, it was found that this algorithm is not the fastest in time, but in all tests, it found the shortest path. The correlation ta = f(w, h) was also obtained for the prepared samples of the desired field, which is expressed as the dependence of the algorithm execution time on the length and width of the field. And we can conclude that it is applicable for finding the movement path of robots, since it always finds the shortest path.