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1932 articles for “Five dimensional Bianchi type-111 space time” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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Research to Improve the Performance of Position Control System Using the SPMSM Based on the Time-varying High Order Sliding Mode Control Method
Abstract: This paper proposes the method of position control system design using permanent magnet synchronous motor (PMSM) based on the time-varying high order sliding mode control (TVHOSMC) strategy. In the conventional sliding mode control (SMC) system the chattering phenomenon appears in the vicinity of the sliding plane and while the error state of system reaches the sliding plane, the system is sensitive to the external disturbance and the parameter change. Thus, …
Published in Journal of Control & Instrumentation · Vol. 15, Issue 1, 2024 · pp. 29–44 Read article
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The Digital Frontier: How Computers Are Shaping the Future of Space Exploration
Abstract: The integration of computers and space technology has revolutionized the way we explore and understand space. Advanced computing systems play a pivotal role in space missions, from spacecraft navigation and communication to data processing and analysis. These technologies enable accurate modelling, simulation, and mission planning, allowing scientists and engineers to overcome the challenges of space exploration. Computers have also facilitated innovations such as artificial intelligence in autonomous spacecraft and real-time …
Published in International Journal of Satellite Remote Sensing · Vol. 3, Issue 1, 2025 · pp. 1–10 Read article
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Holographic Beam Switching and Intelligent Routing for Terahertz Space-Air-Ground Integrated Networks
Abstract: The rapid evolution of sixth-generation (6G) and beyond communication technologies necessitates highly adaptive, ultra-high-capacity, and low-latency networking frameworks capable of supporting global connectivity across terrestrial and non-terrestrial domains. This study proposes a novel holographic beam switching and intelligent routing framework for terahertz (THz) Space-Air-Ground Integrated Networks (SAGINs). The proposed architecture leverages holographic beamforming techniques to dynamically manipulate electromagnetic wavefronts, enabling precise beam steering, reduced interference, and enhanced spectral efficiency in …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 13, Issue 2, 2026 Read article
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Improvement of Indirect Vector Control Induction Motor Drive Performance under Low Speed Operation using Five-Level Inverter
Abstract: The dynamic performance of vector controlled induction motor drive is poor and peak motor torque decreases under low speed operation. This reduction in torque is due to the non-linearity of voltage to frequency (Hz) during low frequency operation. The non-linearity is caused by stator voltage drop which in turn requires a larger percentage of overall terminal voltage. To overcome these problems multilevel inverter fed induction motor drive is presented in …
Published in Journal of Power Electronics and Power Systems · Vol. 3, Issue 2, 2013 · pp. 8–15 Read article
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The Tech That Makes Space Travel Possible: From Earth to Orbit
Abstract: Space flight was once only a dream, but it has now become one of the most important achievements of modern science and engineering. This article looks at the technology that make it possible to travel from Earth to orbit, with a focus on the complex systems that make space missions safe, efficient, and repeatable. It looks at how rocket propulsion has changed throughout time, from classic chemical engines to new …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 15, Issue 1, 2026 · pp. 26–33 Read article
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Study and Analysis of the Results in Fixed Point Fuzzy Metric Spaces
Abstract: The main objective of this study is to use rational inequalities to demonstrate several purpose theorems mounted on fuzzy metric domains. The findings of numerous writers in the body of literature already exist, and our results expand and generalize them. We also provide several applications to back up our findings. In this study, the topic of fixed points in fuzzy metric space is the main focus. It inspires us to …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 10, Issue 1, 2023 · pp. 1–7 Read article
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Dynamic Analysis of Irregular Building with Box Type Shear Wall at Center under Different Type of Soil
Abstract: Building engineers are being shown to accept High rise construction due to increase shortage and land cost. The development of high-rise buildings presents many challenges with the type of lateral load. In High rise buildings getting better efficiency and the high-strength shear wall is an effective solution. The Optimum location of the shear wall depends upon the structural shape of buildings. For irregular structures, inner shear walls provide more strength …
Published in Journal of Construction Engineering, Technology & Management · Vol. 11, Issue 4, 2021 · pp. 37–49 Read article
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Design and Fabrication of Automatic Timetable Generator and its Application
Abstract: Making a schedule manually is exceedingly challenging in today's literate environment. Timetables must be made specifically for each branch and each year. It becomes quite chaotic, time-consuming, and labor-intensive to manually prepare the timetables. When a staff member needs to be substituted or is on leave, the process can occasionally become complicated. In our effort, we have developed a timetable-creation algorithm that will save a lot of time while lessen …
Published in International Journal of Advanced Robotics and Automation Technology · Vol. 1, Issue 1, 2023 · pp. 21–25 Read article
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Evaluation of Reliability in Five-Phase Induction Motor Operated at Low Speed by V/F Control Method using FPGA
Abstract: AbstractThis paper presents the study of performance and reliability evaluation of five-phase induction motor by finding various parameters in the induction motor. Induction motors have increased demand for low cost and size, simple construction, least maintenance, operational simplicity and brush-less construction with cage rotor. Industrial applications demand high efficiency, and reliable and long life-time electrical machines. The fault modes of induction machines are very complex; many researchers are plagued to …
Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 2, 2014 · pp. 56–61 Read article
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Fractional Riemannian Fuzzy C-Means with Time-Series Regularization for Economic Manifold Forecasting
Abstract: A fractional Riemannian fuzzy c-means framework is proposed for uncertain economic forecasting on non-Euclidean data domains. Observations are represented on a Riemannian manifold, cluster centres are intrinsic prototypes, and a latent fuzzy regime signal is regularised by both autoregressive and fractional-memory penalties. The resulting objective couples geometric clustering with time-series consistency, thereby discouraging partitions that are locally plausible but temporally incoherent. Closed-form membership updates, exponential-map centre updates, normal equations for …
Published in Recent Trends in Mathematics · Vol. 3, Issue 2, 2026 · pp. 49–55 Read article
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Performance Analysis of Space Shift Keying and Quadrature Space Shift Keying for MIMO Channels
Abstract: In wireless communication the propagation channel is characterized by multipath propagation due to scattering on different obstacles. MIMO takes advantage of multi-path and uses multiple antennas to send multiple parallel signals from transmitter. “Multi-path” occurs when different signals arrive at the receiver at various times. MIMO exploits the space dimension to improve wireless systems capacity, range and reliability. There are two different modulation techniques that exploits the best features of …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 11, Issue 4, 2022 · pp. 46–55 Read article
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The Study of Nutritional Requirements and Physiological Changes in Space Station
Abstract: This article focuses on the impact of physiological adaptations to weightlessness on nutrient and food requirements in space. These modifications entail reductions in body water and plasma volume, which affect the cardiovascular and renal systems. Spaceflight poses intricate and predominantly detrimental effects on the human body, spanning both short and long durations. Long-term weightlessness leads to significant issues like muscle atrophy, skeletal deterioration, cardiovascular function deceleration, reduced red blood cell …
Published in International Journal of Nutritions · Vol. 1, Issue 2, 2024 · pp. 7–10 Read article
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EVALUATE INDORE CITY'S AMBIENT AIR QUALITY USING THE REAL TIME-AIR QUALITY INDEX (RT-AQI)
Abstract: This effort aims to express the ambient air quality of Indore city as a real-time air quality index (RTAQI). Readings were taken early in the morning (8:00 AM to 10:00 AM) and during the evening rush hour (8.00 PM to 10:00 PM) to assess PM2.5, PM10, sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), carbon monoxide (CO), and NH3 at several places in Indore. With those readings, the air quality …
Published in Journal of Geotechnical Engineering · Vol. 11, Issue 1, 2024 · pp. 1–13 Read article
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Enhancing Space Safety: A Review of CubeSat Constellations for Tracking Orbital Debris
Abstract: Space debris includes any human-made object in orbit or idle. Debris reentering the atmosphere or orbiting the Earth are examples of these things. Debris can include satellites or launch vehicles, dysfunctional spacecraft, remains from rockets and airplanes from crashes or explosions, debris from spacecraft and vehicles that were purposefully expelled during separation or operation, etc. The danger of collisions rises as the number of items in the path increases. Over …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 13, Issue 3, 2024 · pp. 27–43 Read article
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Preparation, Categorization and Anticancer Study of Novel Bicyclic Compounds from Various Types for (Five and Six)- Membered Ring
Abstract: The characteristics of ring systems change in the presence of functional groups, but in some cases, elements that are considered functional groups can be classified within the same ring. Compounds that contain only carbon and hydrogen are called homogeneous rings, while those that contain other elements are called heterogeneous rings. The atom substituted in place of the carbon atom is referred to as a heteroatom. Generally, the heterocyclic atom is …
Published in Journal of Catalyst & Catalysis · Vol. 12, Issue 3, 2025 · pp. 18–30 Read article
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Association between Diabetes Type and Family History of Diabetes: A Cross-Sectional Analysis of Gender Differences and Genetic Influences
Abstract: Introduction: Diabetes mellitus DM is one of the fast-growing chronic metabolic disorder in the world, with high impact and burden in low- and middle-income country. Although genetic predisposition is a central determinant of diabetes risk, particularly for Type 2 diabetes (T2D), the contribution of familial aggregation varies across populations. In many parts of the world where diabetes is rising very fast understanding the relationship between diabetes type and family history …
Published in Research and Reviews: A Journal of Pharmacology · Vol. 15, Issue 3, 2025 · pp. 43–50 Read article
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Time-Cost Trade-off and Constraint Resource Scheduling Considering Overtime for Activity Expedition
Abstract: Project cost, duration and resources are three important parameters of a construction project. There is always a trade-off between project time and cost. While a lot of techniques are available to optimize the project time and cost in normal conditions, less effort is done to optimize them in a resource constraint conditions. This paper is focusing on a nonlinear integer framework for time-cost trade-off (TCT) and constraint resource scheduling (RCS) …
Published in Recent Trends in Civil Engineering & Technology · Vol. 6, Issue 2, 2016 · pp. 30–36 Read article
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Review on Number Theory, Quantisation in Physics and Nanotechnology to Invent the Time-Machine in Rocket Engineering
Abstract: In this research-paper, the interdisciplinary-nature of science is demonstrated by highlighting the aspects of nanotechnology in other branches of science and engineering. The domain of semiconductor-nanostructures in nanotechnology including Ghatak-investigations is highlighted. The experimental demonstration of microfluidics in fluid mechanics is provided towards the probable establishment of nanofluidics in future. The theoretical demonstration on high electron mobility transistors is provided towards the experimental establishment of Nanoelectronics in future. Application of …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 10, Issue 3, 2020 · pp. 20–34 Read article
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The Recovery Water from Urine in the Life-Support System of Automatic Spacecraft using Electric Field Effect on the Urine in the Conditions of Space Flight
Abstract: One of the most critical spacecraft’s life support areas is that concerned with the recovery of water since, except for the shortest space flights, water must be purified and reused. A major source of waste water is in the urine excreted by crew members. However, because of the quantity and chemical nature of the impurities in urine, it is difficult to process in order to provide purified water. The paper …
Published in Journal of Aerospace Engineering & Technology · Vol. 10, Issue 1, 2020 · pp. 47–53 Read article
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Evaluation of Prothrombin Time (PT) and Activated Partial Thromboplastin Time (APTT) Reagents on ECL 760 Coagulation Analyzer
Abstract: Prothrombin time (PT) and activated partial thromboplastin time (APTT) are two essential coagulation screening tests in various critical disorders including cardiovascular diseases and diabetes. Due to its criticality, accurate assessment of both the parameters are essential and fully automated coagulation analyzers like Erba ECL 760 can be of instrument of choice in this situation. The plasma collected from sodium citrated whole blood is preferred sample for coagulation analysis on fully …
Published in Research & Reviews: A Journal of Bioinformatics · Vol. 6, Issue 3, 2019 · pp. 5–11 Read article