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72 articles for “Variable mass”
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Variable Mass of a Test Particle in Copenhagen Problem with Manev-Type Potential
Abstract: AbstractThis study deals the behavior of the motion of a test particle (third body) in the special case of the circular restricted three-body problem when the mass of the test particle varies according to Jeans law and also considered that the equal mass of the primaries generates the Manev-type potentials. This special case of a restricted problem is known as the Copenhagen problem. We derive the equations of motion of …
Published in Research & Reviews : Journal of Physics · Vol. 9, Issue 1, 2020 · pp. 17–27 Read article
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Unified Mass–Energy Dissolution Cosmology (UMEDC): A Staged Framework for Cosmic Energy Transformation and Late-Time Acceleration
Abstract: The ΛCDM model successfully describes the universe’s expansion but remains fundamentally descriptive: it assigns fixed densities to matter, dark matter, and dark energy without providing a unifying physical mechanism behind their coexistence or evolution. In this work, we introduce the Unified Mass–Energy Dissolution Cosmology (UMEDC), a novel framework based on the staged transformation M → DM → DE, where ordinary matter gradually dissolves into a dark-matter-like reservoir, which subsequently transforms …
Published in International Journal of Universe · Vol. 1, Issue 2, 2025 · pp. 18–34 Read article
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Effectiveness of Semi-Active Variable Stiffness Tuned Mass Damper for Seismic Load Using LQR Control
Abstract: In this study, effectiveness of semi-active variable stiffness tuned mass damper in reducing seismic response of 10-story frame structure is evaluated. The variable stiffness device, comprising four spring, having rhombus configuration, adapted from literature is attached to the tuned mass damper. A control algorithm using state space form of governing equation of motion is developed. LQR controller is employed to obtain control force based on displacement and velocity response feedback. …
Published in Recent Trends in Civil Engineering & Technology · Vol. 10, Issue 1, 2020 · pp. 11–11 Read article
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Morphological Heterogeneity and Ethnic Patterning of Anthropometric Traits in Ethiopian Inter-Scholastic Athletes
Abstract: Introduction: Anthropometric characteristics such as body size, proportions, and composition are fundamental determinants of morphological suitability for sport. Ethiopia’s significant ethnic diversity suggests potential variability in these traits; however, systematic data on anthropometric differences among adolescent athletes from different ethnic and demographic backgrounds remain limited. Understanding these variations is critical for talent identification and sports specialization at the school level. Methods: A cross-sectional study was conducted among inter-scholastic athletes representing …
Published in Recent Trends in Sports · Vol. 3, Issue 1, 2026 · pp. 25–34 Read article
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3D Finite Element Analysis of Marine Risers under Random Loads
Abstract: The dynamic response of marine risers under long crested random sea is obtained in time domain using finite element solver ABAQUS/AQUA. The response analysis is based on a simulation technique which duly considers various nonlinear effects such as relative velocity squared drag force, variable added mass due to variable submergence and nonlinearity due to large excursions. It also accounts for variable tension in the riser due to variable submergence, variable …
Published in Journal of Offshore Structure and Technology · Vol. 1, Issue 1, 2014 · pp. 46–52 Read article
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Nonlinear Three Dimensional Dynamic Analysis of Titanium Drilling Riser
Abstract: Titanium alloys are selected for a high-pressure drilling riser’s application due to its high specific strength, corrosion resistance, and favorable elastic properties. The qualification of this titanium alloy requires assessing its resistance to hydrogen embrittlement and stress corrosion cracking due to seawater with/without cathodic protection, evaluating its dynamic response under long crested random sea. The response analysis is based on a simulation technique which duly considers the various nonlinear effects …
Published in Journal of Offshore Structure and Technology · Vol. 2, Issue 2, 2015 · pp. 27–40 Read article
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Mass Production Tools and Process Readiness for Uniform Parts—Injection Molding Application
Abstract: A mass production always aims to produce uniform performing products. Production tools such as pressing dies, casting dies and injection moulds, play a significant role by producing uniform parts for achieving final products. Tool complexity increases when multiple cavities are present. These tools pass through several stages of quality maturation, before starting production, where the tool capability for part uniformity can be assessed, corrected and aligned to mass production variables. …
Published in Journal of Polymer & Composites · Vol. 5, Issue 3, 2017 · pp. 30–40 Read article
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Conversion of PET waste bottles into a useful catalyst
Abstract: Metal-organic frameworks (MOF) are composed of metal ions and organic linkers and have many application fields. Most of MOFs are synthesized by solvothermal method and in this method we mainly use DMF solvent.This paper proposed the synthesis method of MOF UiO-66 which is more eco-friendly than conventional method using harmful DMF solvent. In this method we use the PET waste bottles, which causes a lot of environmental problems in all …
Published in Journal of Catalyst & Catalysis · Vol. 12, Issue 3, 2025 · pp. 11–17 Read article
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Impact of Back Massage on Anxiety Levels in Patients Undergoing Orthopedic Surgery
Abstract: Objectives: The objective of the study was to assess the pre- and post-test levels of anxiety in patients who underwent orthopaedic surgery in both the experimental and control groups, to evaluate the effectiveness of back massage in reducing anxiety among patients in the experimental group, and to explore the association between anxiety levels and selected demographic variables in these patients. Research approach: The aim of the study was to evaluate …
Published in International Journal of Orthopedic Nursing and Practices · Vol. 2, Issue 2, 2024 · pp. 35–57 Read article
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Fabrication and Characterization of Sustained Release Beads of Carbamazepine by Extrusion – Spheronization Containing Carbopol®974
Abstract: The erratic absorption of Carbamazepine, BCS Class II drug, due to low water solubility and anticholinergic properties can be minimized by developing sustained release beads. Sustained release beads of Carbamazepine were prepared using axial single screw extruder and a chequered plate spheronizer. Beads offer therapeutic advantages such as easy dispersion in the gastro-intestinal tract, lower risk of dose dumping, reduce peak plasma fluctuations and drug release is independent of gastric …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 2, Issue 2, 2011 Read article
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Advancements in Waste Heat Recovery from Multistage Air Compressor Operations
Abstract: In industrial production processes, waste heat is an important consequence, especially in sectors that rely significantly on composites and polymers. Frequently, this heat is released into the atmosphere without being captured, which raises operating expenses in addition to wasting potential energy. In these sectors, waste heat recovery, or WHR, has become a key tactic for raising sustainability and energy efficiency. The WHR potential of multistage air compressors—essential parts of industrial …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 29–38 Read article
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Evaluating the Impact of the Valsalva Maneuver on Pain Relief During Intravenous Cannulation in Patients at Selected Hospitals in Tirupati, Andhra Pradesh
Abstract: Pain can be defined as an unpleasant tactile sensation, arousing sensory experience, and an emotional response that is linked to any type of tissue, cell, or skin damage. Pain is a very common and a primary reason for which people seek health care. Among all the non-pharmacological methods for pain relieving, the Valsalva maneuver is one of the methods which is found effective in reducing the level of pain a …
Published in Research and Reviews : A Journal of Medical Science and Technology · Vol. 13, Issue 3, 2024 Read article
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A Literature Review on Extrusion/Spheronisation-A Pelletization Technology
Abstract: Extrusion-spheronization is a leading pelletization technology, widely favored for its economic and commercial viability. It is a cost-effective method suitable for large-scale production, making it the most efficient approach for oral drug delivery. This process provides multiple benefits, such as improved flow characteristics, lower friability, a narrow particle size range, easier coating, consistent packing, reduced likelihood of dose dumping, and more predictable gastric emptying. Pellets usually measure between 0.5 and …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 16, Issue 1, 2025 · pp. 61–71 Read article
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Systolic-Predominant Hypertension and the Aging Heart: A Cross-Sectional Study on LVH and Cardiovascular Riskss
Abstract: Background: Systolic-predominant hypertension, defined as a systolic blood pressure ≥140 mm Hg with diastolic pressure <90 mm Hg, is the most prevalent form of hypertension in the elderly. It arises primarily due to age-related arterial stiffening and baroreceptor dysfunction. Once considered a benign outcome of aging, systolic-predominant hypertension is now recognized as a major risk factor for cardiovascular morbidity and mortality. Aim and Objective: To evaluate the cardiac status and …
Published in Research and Reviews: A Journal of Medicine · Vol. 16, Issue 1, 2026 · pp. 13–24 Read article
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To Develop Self-instructional Module on ‘Umbilical Cord Stem Cell Collection, Preservation and Utilization’ and Evaluate its Effectiveness on Improving the Knowledge of Operational Level Nurses
Abstract: Umbilical cord stem cell based regenerative and cellular medicine has now become a fascination for all. The umbilical cord blood, donated by mothers after the birth of newborn, has become an accepted source of hematopoietic stem cells for bone marrow reconstitution. They play an important role in the treatment of blood and immune system related genetic diseases, cancers, and blood disorders. This study is aimed to assess the knowledge of …
Published in Research and Reviews: Journal of Oncology and Hematology · Vol. 9, Issue 3, 2020 · pp. 10–22 Read article
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Awareness and Impact of Education on Breast Self Examination Among Housekeeping Staffs (Class IV Workers)
Abstract: Breast cancer accounts for 19–34% of all cancer cases among women in India. There is high mortality due to lack of awareness and nonexistent breast cancer screening programmes. Early detection and prompttreatment offer the greatest chance of long-term survival and BSE (Breast Self Examination) seems to be an important viable optional substitute for early detection of cancer. The aim of the study was to assess the existing knowledge and skills …
Published in Journal of Nursing Science & Practice · Vol. 1, Issue 1-2, 2011 · pp. 21–27 Read article
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Impact of Solar Variability on the Heliosphere and Cosmic Rays Modulation with Geomagnetic Activity
Abstract: AbstractThe structure of the heliosphere and produce changes in cosmic ray intensity controls by solar variability. the observation based on data taken from Omniweb data center for solar interplanetary data and count rate of cosmic ray intensity (CRI) variation data from Oulu / Moscow neutron monitors (with cutoff rigidities Rc=0.80 GV and Rc=2.42 GV) during 1996-2018. It is observed that the sun is remarkably quiet and the strength of the …
Published in Recent Trends in Electronics Communication Systems · Vol. 7, Issue 1, 2020 · pp. 32–35 Read article
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Employ of Design of Experiments for Optimization of Instinctive Variables in Turning Operation: A Review
Abstract: In recent years, due to tremendous progress in manufacturing industries, great changes have especially been ascertained in machining of metals. Every manufacturing industry intent to produce a massive number of commodities within comparatively lesser time. This persuades optimization problem which endeavor to access the best parametric combination for the manufacturing process. This paper presents a critique of optimization of instinctive variables in turning operation by employing various techniques of Design …
Published in Trends in Mechanical Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 7–16 Read article
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Performance test to determine electric vehicle driving range
Abstract: A new method to estimate the driving range in electric vehicles has been developed. The new method is based on full electric energy supply from a unique lithium-ion battery that equips the electric vehicle. The simulation method includes engine consumption as well as auxiliary systems and accessories that are currently powered by a servicing lead-acid battery. The modeling uses an AC/DC double electric circuit to represent the AC electric engine …
Published in Journal of Mechatronics and Automation · Vol. 8, Issue 2, 2021 · pp. 10–20 Read article
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Characterization of a Broadly Specific LPS-Neutralizing Single Domain Antibody
Abstract: Gram negative endotoxaemia or sepsis remains a lethal challenge to humans and animals, globally. Single domain antibodies (dAbs) have emerged as therapeutic biologics for challenging antigens such as lipopolysachharide (LPS). The present study characterized a broadly specific LPS-neutralising dAb produced from phage display library from LPS-immunized Indian desert camel, for its sequence validation with mass spectrometry. Also, the dAb clone 26 was subjected to co-crystallisation with LPS, extracted from E. …
Published in Research and Reviews : A Journal of Immunology · Vol. 7, Issue 1, 2017 · pp. 1–7 Read article