Research Infinity - All Articles

Physics Maths Engineering

Optimal Predictive Torque Distribution Control System to Enhance Stability and Energy Efficiency in Electric Vehicles

This article presents a novel approach to address the critical issues of stable rotation and energy efficiency in electric vehicles (EVs). To achieve these objectives, we propose a comprehensive control system that leverages the power of optimization through optimal predictive control methods. The central idea revolves around minimizing the predicted tracking error for future time steps by...
Posted 3 weeks ago

Physics Maths Engineering

Impact of Low-Reactivity Calcined Clay on the Performance of Fly Ash-Based Geopolymer Mortar

Availability of aluminosiliceous materials is essential for the production and promotion of geopolymer concrete. Unlike fly ash, which can only be found in industrial regions, clays are available almost everywhere but have not received sufficient attention to their potential use as a precursor for geopolymer synthesis. This study investigates the effectiveness of calcined clay as a sole an...
Posted 3 weeks ago

Physics Maths Engineering

Subsurface Topographic Modeling Using Geospatial and Data Driven Algorithm

Infrastructures play an important role in urbanization and economic activities but are vulnerable. Due to unavailability of accurate subsurface infrastructure maps, ensuring the sustainability and resilience often are poorly recognized. In the current paper a 3D topographical predictive model using distributed geospatial data incorporated with evolutionary gene expression programming (GEP)...
Posted 3 weeks ago

Physics Maths Engineering

Hydration, Reactivity and Durability Performance of Low-Grade Calcined Clay-Silica Fume Hybrid Mortar

Low-grade calcined clay, due to its low cost, availability and low temperature calcination, has been gaining attention in recent times as a supplementary cementitious material (SCM) in the manufacture of revolutionary building materials to improve the fresh and hardened properties of concrete. Silica fume, on the other hand, has been used, over the years, to improve the performance of conc...
Posted 3 weeks ago

Physics Maths Engineering

“Noncovalent Interaction”: A Chemical Misnomer That Inhibits Proper Understanding of Hydrogen Bonding, Rotation Barriers, and Other Topics

We discuss the problematic terminology of “noncovalent interactions” as commonly applied to hydrogen bonds, rotation barriers, steric repulsions, and other stereoelectronic phenomena. Although categorization as “noncovalent” seems to justify classical-type pedagogical rationalizations, we show that these phenomena are irreducible corollaries of the same orbital-level conceptions of...
Posted 3 weeks ago

Physics Maths Engineering

Piston Compression Ring Elastodynamics and Ring–Liner Elastohydrodynamic Lubrication Correlation Analysis

Friction loss in an internal combustion engine largely depends on elastohydrodynamic lubrication. The piston compression ring is a contributor to such parasitic losses in the piston subsystem. The complex elastodynamics of the ring are responsible for the transient and regime-altering film that affects the elastohydrodynamic lubrication of the ring liner contact conjunction. The current pa...
Posted 3 weeks ago

Biomedical

Combining Genetic Algorithm with Local Search Method in Solving Optimization Problems

This research focuses on evolutionary algorithms, particularly genetic and memetic algorithms. The study examines a graph theory problem related to finding a minimal Hamiltonian cycle in a complete undirected graph (Travelling Salesman Problem-TSP). The paper presents implementations of two approximate algorithms for solving this problem: genetic and memetic. The main objective is to determine the...
Posted 3 weeks ago

Physics Maths Engineering

Sequential Test of Fuzzy Hypotheses

This paper explores the problem of testing statistical hypotheses when the hypotheses are fuzzy and the data are crisp. The authors introduce new definitions for mass (density) probability functions with fuzzy parameters, as well as probabilities of type I and type II errors. They then present and prove a sequential probability ratio test for fuzzy hypotheses based on these new error definitions. ...
Posted 3 weeks ago

Humanities and Arts

Hope and Imagination: Theological Aspirations for Overcoming Violence

This article explores the concept of hope and imagination in ecumenical efforts to overcome violence. It examines how defenses of peace can be constructed in human minds, particularly in contexts of religious antagonism. The author discusses the role of dialogue, empathetic imagination, and memory in transforming perceptions of religious others and building peaceful communities. The article draws ...
Posted 3 weeks ago

Humanities and Arts

Anthropology of Hope (Editorial)

Introduction

This issue of Communio Viatorum features expanded versions of papers presented at a conference on "Anthropology of Hope" held in Prague in May 2023. The conference was the final event of a six-year Charles University Centre of Excellence Research Project on Theological Anthropology in Ecumenical Perspective. The issue addresses the ...
Posted 3 weeks ago