Towards Sustainable Transport: An Analysis of Urban Mobility in Hyderabad, Telangana Using Uber Movement Data

Cities worldwide face traffic congestion, challenging sustainable development and requiring insight into its dynamics, dispersion, and stability. Effective traffic management is pivotal for fostering sustainable urban mobility and enhancing quality of life. Leveraging Uber movement data, this study examines travel times and speeds across Hyderabad over a four-year span from 2016 to 2019. Congestion and friction indices from travel time matrices, along with network analysis, gauge urban accessibility, revealing similar magnitudes of Congestion and Travel Time Delay Transition Indices for inbound and outbound traffic within specific intervals. Notably, there is an inverse proportional relationship between these two indices. The Congestion Index values indicate that most zones experience significant traffic jams, while the Travel Time Delay Transition Index was calculated to affirm its inverse relationship with the Congestion Index. Employing fractal geometry, the study delves into the spatial complexity of the network and its correlation with urban growth parameters, contributing to sustainable urban planning efforts. Furthermore, the fractal dimension value obtained from the Mass-Radius method is 1.6955, with a correlation coefficient of 0.99, indicating a high degree of linearity between the road network and friction index. Results underscore the intricate interplay between traffic congestion, macroeconomic factors, and urban form, highlighting the imperative of integrating sustainability principles into transportation policies. By leveraging readily available Uber movement data, this research provides a comprehensive assessment of citywide traffic conditions, offering valuable insights for crafting sustainable transportation management strategies aimed at mitigating congestion and promoting equitable access to mobility

Mechanical Behavior of Layered Composite Structures of Aluminum Foam Partially Filled with Polyamide

In this study, the mechanical properties of layered composite structures were investigated. We achieved the layered structure by hot-pressing 1 mm, 3 mm, or 5 mm thick polyamide 6 (PA) sheets into the pores on the top and bottom sides of an open-cell metal foam at 240 °C and 15 MPa (150 bar). The PA-infiltrated depths varied with the thickness of the hot-pressed PA sheets. According to the bending and post-impact bending tests, flexural strengths improved as the infiltration depth of PA increased. Compared to the metal foam, a maximum of 15% increase in flexural strength and a 400% increase in residual flexural strength were measured. However, using a 1 mm thick PA sheet lowered the flexural strength of the open-cell metal foam. We found that the 1 mm thick PA sheet failed to fully infiltrate the foam pores, resulting in residual voids at the metal-PA interface, which caused premature fracture during bending

Influence of Infrared Radiation of Drying Characteristics, Total Phenolic Content, Antioxidant Capacity and Color Properties of Pomegranate Seeds

The aim of this research is to analyze the drying behavior, antioxidant properties, total phenolic content (TPC), and color alterations of pomegranate seeds subjected to infrared drying at temperatures ranging from 55 °C to 75 °C. Analysis of the data revealed a declining-rate drying phase without evidence of a constant-rate phase. The drying rate and duration were found to be directly proportional to the infrared temperature applied; higher temperatures led to faster drying and reduced drying times. The drying process of pomegranate seeds in thin layers was investigated using twelve mathematical models. Among these models, the one presented by Aghbashlo et al. was determined to provide the most precise representation of the drying kinetics. The effective moisture diffusivity values varied between 8.76 × 10−10 and 1.96 × 10−9 m2/s, depending on the temperature range under consideration. Additionally, the activation energy was computed to be 59.37 kJ/mol. The range of TPC values in dry samples fluctuated from 6.19 to 8.20 mg gallic acid equivalent (GAE)/g of dry matter. The 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and copper-reducing antioxidant capacity (CUPRAC) values varied between 5.57–6.13, 24.18–28.18, 10.33–17.59 TE/g dry matter, respectively. The range of ΔE values for the total color change fell between 3.96 and 9.19. Bioactive compound degradation in samples dried at high drying temperature (75 °C) is higher than in samples dried at 55 and 65 °C. When all the results were evaluated, it was determined that 55 °C was suitable for infrared drying of pomegranate seeds

Metamodel-based Optimization of Anisotropic Rotor Axial Flux Permanent Magnet Synchronous Motors

Axial flux motors have some significant advantages over radial flux motors in high torque-density applications. However, the optimization of axial flux permanent magnet synchronous motors is a challenging task; the analysis usually requires 3D finite element analysis or the application of the 2D multi-slice method. In this paper a novel single-surrogate multi-slice method (SS-MSM) is proposed for modeling anisotropic rotor axial flux permanent magnet motors. However, the general methodology can be applied to other axial flux motors as well. A model calibration methodology has been described where the SS-MSM parameters have been determined using a 2D finite element approach as a reference. The SS-MSM was found to be suitable for a fast and reasonably accurate approximation of the motor performance. Based on the described analysis method, an efficient optimization approach is proposed

A Zágrábi Nemzeti és Egyetemi Könyvtár magyar nyelvű gyűjteménye

The National Library of Zagreb is the second largest library in Croatia. It is also a university library, and as such, it also meets the needs of the students of the Hungarian Department in Zagreb. The Hungarian Department Library began to flourish with the move to the new building, and today the collection comprises some 5,000 titles and 860 periodicals, which is currently being expanded.A Zágrábi Nemzeti Könyvtár Horvátország második legnagyobb könyvtára. Az intézmény egyben egyetemi Könyvtár is, ebben a minőségében igyekszik kielégíteni a zágrábi Magyar Tanszék hallgatóinak igényeit is. A magyar tanszéki könyvtár felvirágozása az új épületbe való költözéssel kezdődött, a gyűjtemény ma kb. 5000 címszót és 860 folyóiratot foglal magában, gyarapítása jelenleg is aktívan zajlik

Urban Mobility Modeling in PTV Visum with Various Options for Bus Fare Structure

The study focused on applying linear and non-additive fare structure models to simulate flat fares with a set of constraints for each fare model that can be used on public transport in real-world conditions. To this end, a method for modeling flat fares using PTV Visum software, specifically the origin-destination fare model, has been developed. The impedance function, which is used in the public transport headway-based assignment, is determined to minimize deviations between actual and calculated passenger volumes for bus routes using SQV statistics. The case study aims to develop a method for modeling flat fares within PTV Visum to predict and analyze passenger traffic on municipal bus routes in the Ukrainian city of Kryvyi Rih in the case of implementing flat fares for these routes. Two options were modeled: the current situation with a flat fare of UAH 15 (EUR 0.35) for bus routes run by private operators and fare-free public transit for municipal bus routes, and an anticipated scenario with a flat fare of UAH 15 (EUR 0.35) for bus routes operated by private companies and a flat fare of 8 UAH (0.18 EUR) for municipal bus routes. These evaluations provide insight into passenger flows on municipal bus routes under the existing fare option and in the case of implementing a charge for municipal transport in Kryvyi Rih. Obtaining results of passenger volumes and devising an approach to fare modeling is crucial for transportation sector decision-makers, aiding in the development of effective fare strategies within the city

Effect of Coconut Fiber Content on the Properties of Unfired Building Bricks Incorporating Thermal Power Plant Ashes

This study examined the effect of coconut fiber (CF) content on the properties of unfired building bricks (UBBs) using fly ash (FA) and bottom ash (BA) from the Nghi Son coal-fired thermal power plant (CTP). Cement and FA served as binders while BA replaced crushed stone as the fine aggregate. Raw brown CFs were treated with a 5% NaOH solution at 50 °C to increase their mechanical properties. The treated CFs were then cut to a short length of 15 mm and had an average aspect ratio of 103. Brick samples were cast with CF content at ratios of 0%, 3%, 6%, and 9% by binder weight (CF/B) and water-to-binder (W/B) ratios of 0.30 and 0.35. The UBBs were formed under a low pressure of 0.5 MPa and tested to evaluate the effects of CF/B and W/B ratios on brick properties. Results showed that compressive strength (CS) increased with higher CF content, with all samples exceeding 10 MPa after 28 days, classifying them as grade M10 per TCVN 6477:2016. The optimal CF content was 6%, which yielded the highest CS. Increasing CF content reduced unit weight (UW), ultrasonic pulse velocity (UPV), and thermal conductivity (TC), while water absorption (WA) increased. Conversely, a lower W/B ratio improved CS, UW, UPV, and TC, while reducing WA. Microstructural observations revealed that CF acts as a bridge connecting cracks, which helps restrain crack widening and enhance CS

Numerical Study of the Optimal Position of Corona Wires in Two Types of ESP

In recent years, particulate emissions have advanced to the top of the global priority list. Numerous research, both numerical and experimental, have been conducted to explore different corona wires and collecting plate configurations. This study aims to investigate the best location of corona wires arrangements using 3 types of collecting plates; wavy plates (wavyPs), and inverted wavy plates (InvwavyPs), flat plates (FPs) as a reference case. Where, three positions of corona arrangements were modelled with three types of collecting plates via Finite Element Method (FEM)

Numerical Investigation of Enhanced Efficiency in CIGS Solar Cells with 3C-SiC and PEDOT:PSS Integration

Copper indium gallium selenide (CIGS)-based thin-film solar cells continue to lead advancements in the efficiency of thin-film technologies. In this study, we propose cubic silicon carbide (3C-SiC) as a viable alternative to cadmium sulfide (CdS) for use as a buffer layer in CIGS solar cells. 3C-SiC offers superior transparency, higher electron mobility, and non-toxicity, making it a promising candidate for enhancing device efficiency. In this paper, we present a computational analysis of a thin-film solar cell utilizing a ZnO/3C-SiC/CIGS/ poly(3,4-ethylenedioxythiophene) (PEDOT): polystyrene sulfonate (PSS)/Mo heterostructure with PEDOT:PSS as the back surface field (BSF) layer. Simulations conducted using SCAPS-1D software demonstrate impressive photoconversion efficiencies, achieving an ideal efficiency (η) of 32.83%, an open circuit voltage (VOC) of 0.86 V, a short circuit current density (JSC) of 56.40 mA cm−2, and a fill factor (FF) of 80.79%. The study systematically examines the influence of key parameters, including CIGS absorber thickness, PEDOT:PSS thickness, 3C-SiC thickness, and temperature, demonstrating a strong correlation with previous experimental results. These findings offer valuable insights for enhancing the performance of CIGS solar cells and highlight promising avenues for future advancements in thin-film photovoltaics

The Comparison of Attributes of Social Intelligence and Machiavellianism in Managerial Work

This paper aims to contribute on a theoretical and empirical level to the solution of questions related to the use of social intelligence and Machiavellianism in the management profession, based on the theoretical treatment of the issue. It sets out to specify mutual differences and relationships relating to selected attributes of methodologies used to determine social intelligence and Machiavellianism in the conditions of managerial work. The research sample consisted of 234 participants (131 women) aged 28 to 40 (mean = 28.72; SD = 6.67). The respondents worked in both the private and public sectors in managerial and non-managerial positions. The data from the respondents were obtained by questionnaire methods, processed and analysed by mathematical-statistical methods at the descriptive and inductive statistical level, as well as more advanced statistical methods. The methods provided data on basic sociodemographic characteristics, social intelligence (MESI questionnaires) and Machiavellianism (VYSEDI). The results of the project contribution brought knowledge at the level of theoretical, empirical, as well as in the practical application of the acquired knowledge. Within the established hypotheses, we found statistically significant differences in selected attributes of social intelligence and Machiavellianism within the managers' workplace setting, as well as differences between managers and non-managers. We also identified mutual correlations between selected attributes in relation to age. On the basis of the presented results, findings and knowledge, as well as the summary and refinement of the results for practical applications, it can be concluded that the goal of the contribution has been fulfilled