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1891 articles for “observation”
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Gravitational Wave Astronomy (2015–2026): From Historic Discoveries to Quantum Detection Frontiers
Abstract: Since the landmark detection of GW150914 by the LIGO Scientific Collaboration in 2015, gravitational wave (GW) astronomy has transitioned from a theoretical frontier to a robust observational science. This breakthrough confirmed a major prediction of General Relativity and inaugurated an entirely new method for observing the universe. Over the past decade, continuous upgrades to ground-based interferometers such as LIGO, Virgo Collaboration, and KAGRA have dramatically improved detector sensitivity, enabling the …
Published in International Journal of Universe · Vol. 2, Issue 1, 2026 · pp. 1–5 Read article
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Synthesis of Polyorthanisidine by Interfacial Polymerization
Abstract: AbstractPolyorthoanisidine has been synthesized by interfacial polymerization method. O-anisidine has been used as a monomer, hydrochloric acid is used as a dopant and ammonium persulphate as an oxidiser. The solvent used for the study is chloroform, isopropanol, hexane and xylene. The polyorthoanisidine obtained is characterized for particle size analysis. It is observed as with xylene as a solvent the least particle size has been observed with Z average value of …
Published in Journal of Polymer & Composites · Vol. 5, Issue 1, 2017 · pp. 1–6 Read article
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Sedimentation Analysis of Pench Dam using SWAT and SWAT-CUP Algorithm
Abstract: The Soil and Water assessment tool (SWAT) can be a very important tool to analyze the sediment as the determining the actual sediment deposit requires the very extensive observations of the sediment and it can be very much expensive and time consuming. The SWAT model along with little input of observe data can be used with proper calibration technique as the actual data for sedimentation and studying the changes in …
Published in Journal of Water Resource Engineering and Management · Vol. 8, Issue 2, 2021 · pp. 19–61 Read article
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Protective Measures Practiced by Nursing Personnel while Providing Nursing Care to Patients in a Tertiary Care Hospital
Abstract: Nosocomial infections remain a major challenge of modern medicine. It is recommended that all the hospitals adopt an infection control policy of “Universal Precautions”. Aim of this study was to assess the protective measures taken by nursing personnel while providing nursing care to the patients at a tertiary care hospital. The Study design used was prospective observational study. The study was conducted at Medical Emergency Outpatient Department of a Tertiary …
Published in Journal of Nursing Science & Practice · Vol. 1, Issue 1-2, 2011 · pp. 64–68 Read article
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An Experimental Investigation on the Forming Force in Asymmetric Parts Formed using Single Point Incremental Forming
Abstract: Single point incremental forming (SPIF) is used to form small batch production of different shapes of parts. Present study is focused on investigation of part asymmetry on the forming behavior of the parts formed using SPIF process. Wall angle as an asymmetry is considered for forming of the pyramidal frustrum. The wall angle is varied from 50 degree to 65 degree and subsequent forming forces are recorded using force dynamometer. …
Published in Journal of Polymer & Composites · Vol. 11, Issue 12, 2023 · pp. 18–31 Read article
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Seasonal Variation in the Weibull Parameters from In Situ Measurements and Model: A Case Study in the Bay of Bengal
Abstract: Seasonal variation of wind speed (U10) and its distribution are essential for the design of wind energy converters (WEC). In this study, year-round wind speed observations from a deepwater moored buoy at a location in the Bay of Bengal are used to assess the potential for wind power generation and are used to validate the ERA5 model. Model-U10 distribution is confined to low wind speeds with high occurrence in the …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 15, Issue 1, 2024 · pp. 30–40 Read article
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Presence of a Bulk Viscous Universe within f(R, T) Gravity
Abstract: This paper offers a comprehensive analysis of a bulk viscous universe in the context of f(R, T) gravity, where (R) signifies the Ricci scalar and (T) represents the trace of the energy-momentum tensor. The primary objective of our work is to get explicit solutions to the modified field equations by using a power-law scale factor representation. With this method, we have obtained functions of cosmic time and redshift for the …
Published in International Journal of Universe · Vol. 1, Issue 1, 2025 Read article
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X-ray Telescopes: Technological Developments and Contributions to High-Energy Astrophysics
Abstract: X-ray telescopes have revolutionized our understanding of the high-energy universe, unveiling phenomena that are invisible to optical telescopes. This paper reviews the technological advancements in X-ray telescope design, instrumentation, and data analysis techniques, which have significantly enhanced their sensitivity and resolution. We trace the development from early X-ray detectors to modern space-based observatories like the Chandra X-ray Observatory and the XMM-Newton. These advancements have facilitated groundbreaking discoveries, such as the …
Published in International Journal of Universe · Vol. 1, Issue 1, 2025 Read article
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Robust Control System for Missiles in the Presence of Uncertainty and Disturbances: A Comprehensive Review
Abstract: In today's warfare and defense systems, when precise and quick maneuvering is essential for mission accomplishment, missiles play a critical role. Nonetheless, the intricacy of missile dynamics by itself, combined with external disruptions and unpredictabilities in operational circumstances, provides challenging but ambitious conditions for achieving precise trajectory tracking and robust flight control. Missiles perform in highly dynamic and uncertain environments where factors such as aerodynamic disturbances, various atmospheric conditions, and …
Published in International Journal of Satellite Remote Sensing · Vol. 2, Issue 1, 2024 · pp. 27–34 Read article
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Variation in Ozone at Night in Barrow, Alaska, during Different seasons, and its Relationship to Methane at Different Pressures
Abstract: The study is focus on the investigation of the night-time seasonal variability of ozone (O₃) at Barrow, Alaska, and also it examines its association with methane (CH₄) concentrations at different pressure levels along with solar flux variations on the basis of eighteen years (2003–2020) of observational data, including ground-based ozone measurements, satellite-derived methane data at 100, 200, 300, 400, and 500 hPa, and solar flux (F10.7) values. For finding the …
Published in International Journal of Atmosphere · Vol. 3, Issue 1, 2026 · pp. 44–53 Read article
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High-Energy Astrophysics: Exploring the Extreme Universe Through Radiation, Relativistic Phenomena, and Cosmic Cataclysms
Abstract: High-energy astrophysics is a fast-developing area of astrophysical research dedicated to exploring the universe’s most powerful and extreme events. It involves investigating dense and energetic cosmic objects and phenomena, including black holes, neutron stars, supernova remnants, gamma-ray bursts, and active galactic nuclei. These sources emit radiation predominantly in the X-ray and gamma-ray regions of the electromagnetic spectrum and are often associated with high-energy particles, including cosmic rays and neutrinos. Investigating …
Published in International Journal of Universe · Vol. 2, Issue 1, 2026 · pp. 10–15 Read article
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Wastewater Management in Smart Cities Using PLC and SCADA
Abstract: Smart cities are the best examples to improve the standard of living of people in any country. Cities are made smart by integrating smart systems, that is, water supply system, electricity control system, smart communication technology etc. In this study, a model has been developed for controlling the water supply system for a smart city using PLC (Programmable Logic controller) and SCADA (Supervisory Control and Data Acquisition). A case study …
Published in Current Trends in Signal Processing · Vol. 10, Issue 3, 2020 · pp. 32–41 Read article
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Comparison of the Compressive Strength of Concrete Made with Palm Kernel Shell and Gravel as Coarse Aggregates
Abstract: The investigation of alternative materials for the construction, comparison of the compressive strength of concrete made with palm kernel shell as coarse aggregate and concrete made with gravel. A mix proportion of 1:2:4 with water cement ratio of 0.6, ordinary Portland cement, PKS, gravel and sand were used for this research. 24 cubes were cast and tested for compressive strength at 7, A14, 21 and 28 days. The result showed …
Published in Journal of Construction Engineering, Technology & Management · Vol. 12, Issue 1, 2022 · pp. 12–18 Read article
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The Resurging Effect of Climate – Human Interaction on the Soil of Abia State, Nigeria: A Climate Change Perspective.
Abstract: Abstract Studies on the impact of climate change on soil erosion have been widely acknowledged by parts of the eastern states of Nigeria as one of the major land degradation problems besetting the area. This study adopts Geographic Information System (GIS) and Remote Sensing techniques as veritable tool to study the effect of Climate – Human interaction on soil of Abia state. Increase in observed mean rainfall of 5.85, 5.62, …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 10, Issue 2, 2020 · pp. 27–44 Read article
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Development of Mathematical Model to Monitor the Deposition of Nitrogen Inhibited by Lead in Consolidated Lateritic Formation
Abstract: This paper monitors the depositions of nitrogen inhibited by lead in consolidated lateritic formation. The study expresses the accumulation from lateritic depositions of lead in the formation. Such conditions were observed in lateritic soil. Lead depositions were thoroughly evaluated to see if it can inhibit the deposition of nitrogen in consolidated lateritic formation. Such outside the deltaic depositions were lateritic soil predominantly deposited in such location. The study observed that …
Published in Journal of Geotechnical Engineering · Vol. 6, Issue 1, 2019 · pp. 1–8 Read article
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Study and Output Performance of PMSG Based WECS by Using MPPT Control Technique
Abstract: AbstractAs we know, our interests in Renewable Energy Resources are increasing day by day. So, the increasing integration of distributed generation sources is accompanied by problems with primary energy resources and policy issues such as economic efficiency. Due to these problems, we have to move towards various techniques which are able to eliminate the above problems. These techniques are called Maximum Power Point Tracking or MPPT. In this paper, the …
Published in Journal of Instrumentation Technology & Innovations · Vol. 9, Issue 2, 2019 · pp. 41–50 Read article
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Theoretaical Analysis of Self-discharge behavior of Supercapacitor using physical parameter variation in Simulink/ MATLAB
Abstract: Understanding the self-discharge behavior of a supercapacitor is very important regarding make it more efficient for its applications. Different types of RC circuit models have been developed. We have studied the different RC circuit models and took the classical RC circuit model to study self-discharge behavior. This model requires three parameters: a capacitor (Cs), parallel resistance (R), and equivalent series resistance (Resr), and very easy to implement in simulation. The …
Published in Journal of Microelectronics and Solid State Devices · Vol. 8, Issue 1, 2021 · pp. 14–22 Read article
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Economics of Construction Site Productivity: Work Environment Factors Affecting the Output of Craftmen in Nigeria
Abstract: The construction industry faces challenges and problems associated with craftsmen's output, which impacts the economic productivity of the construction sector. Construction workers in Nigeria have always been subjected to working within an unconducive environment, which has not allowed for a high level of economic productivity. This study extensively analyses some of these work environment factors affecting craftsmen's output on building sites in Port Harcourt, Nigeria. A survey of selected construction …
Published in Journal of Production Research & Management · Vol. 13, Issue 3, 2023 · pp. 12–23 Read article
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The climate change analysis on water resources over western Ghat by deficit calculation method
Abstract: The objective of this work is to study the extreme hydrological events and climate change impact on water resources over western Ghat. The western ghat is spread over the area 140 thousand square kilometers and 2600 meter of average elevation. The 1600 Km long western ghat is biodiversity hotspot and home of different species it also forms the catchment which drains over one-third of India. To analyze the extreme hydrological …
Published in Journal of Water Resource Engineering and Management · Vol. 7, Issue 1, 2020 · pp. 16–35 Read article
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Modeling and Simulation to Monitor Dissolved Nitrogen Depositions in Eleme Streams, River State
Abstract: This paper monitor the dissolved nitrogen deposition in stream, the study observed high rate of nitrogen content in the stream, the result from physiochemical analysis shows the rate and variation of nitrogen concentration, this pollution content were monitored applying modeling and simulation, the predictive values were generated from different stations, the result shows decreasing rate of dissolved nitrogen from all the stations, the results expresses in every points of observation …
Published in Journal of Water Resource Engineering and Management · Vol. 7, Issue 2, 2020 · pp. 23–37 Read article