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1387 articles for ““SPA””
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A Overview of Free Space Optical Communication (FSO)
Abstract: Free Space Optical communication (FSO) is a wireless communication system that employs light propagation across free space to transport data between two sites without the usage of fibre optic cables. It uses either lasers or light emitting diodes (LEDs) for high speed data transmission with enormous bandwidth, which makes it a desirable solution for modern communication systems. The FSO provides many advantages such as minimal installation cost, excellent security, licence …
Published in International Journal of Optical Innovations & Research · Vol. 4, Issue 1, 2026 · pp. 31–35 Read article
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Metamaterial-Based Thermal Shielding Structures for Reusable Hypersonic Space Transportation Systems
Abstract: The rapid development of reusable hypersonic space transportation systems has intensified the need for advanced thermal protection technologies capable of withstanding extreme aerodynamic heating conditions encountered during atmospheric re-entry and sustained hypersonic flight. Conventional thermal shielding materials often suffer from high structural weight, limited adaptability, thermal fatigue, and degradation under repeated thermal cycling. This study proposes a novel Metamaterial-Based Thermal Shielding Structure for Reusable Hypersonic Space Transportation Systems, integrating engineered …
Published in Journal of Aerospace Engineering & Technology · Vol. 16, Issue 2, 2026 Read article
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Web Mapping Comparison of Open Layers Map and Google Map: A Web GIS based Big Spatial Data Approach
Abstract: Big data sharing and manipulation of geospatial data such a GIS web-based system has become a challenge. Due to the rapid development technology in web based geographical information systems, the uses of web based geospatial application, effective utilization and representation varies from Geo-spatial capabilities and functionalities. In this paper, a web GIS framework was explored to provide a practical solution for the display and manipulations of geospatial data, visualization of …
Published in Journal of Geotechnical Engineering · Vol. 2, Issue 3, 2015 · pp. 41–45 Read article
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Improvement of the Space Management of Any Organization Using Different Japanese Management Tool
Abstract: This paper will fully deal on the Kaizen formula and 5S of Japanese strategies for the improvement in space management of several organizations. Global markets are continuously changing and demanding product of high quality and low cost. Cottage industries play an important role in Indian economy. There are large numbers of in industries and it is emerging an as providing larger employment opportunities next to agriculture. Lean manufacturing is one …
Published in Journal of Industrial Safety Engineering · Vol. 3, Issue 3, 2016 · pp. 11–16 Read article
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A Hybrid Cascaded Multilevel Inverter using Space Vector Pulse Width Modulation
Abstract: This paper proposes a topology of hybrid cascaded multilevel inverter consisting of two inverters namely main inverter and auxillary inverter. Main inverter consists of three-leg inverter with single DC source and auxillary inverter consists of three H-bridge two-leg inverter with separate DC sources for each H-bridge. Switches used in our proposed method are IGBT (insulated-gate bipolar transistor). The proposed model consists of 18 switches. The switches are controlled by space …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 1, 2015 · pp. 14–19 Read article
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An Efficient RNS Based Sparse Kogge Stone Parallel Pre-fix Adder with Filter
Abstract: AbstractLow power very large-scale integration (VLSI) circuits are important for designing of high performance and portable devices. Along with that the high speed, small area and low cost are also the main considerations of VLSI circuits. The importance of low power is increasing day by day because of changing trend, packaging and cooling cost, portable system and reliability. This paper presents the design of Digital FIR filter using reverse converter …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 1, 2018 · pp. 43–51 Read article
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A Novel Approach for 3D Floor Planning in VLSI with Minimum Dead Space using a New Topological Structure
Abstract: Floor planning is a key issue in VLSI physical plan. The floor planning issue can be defined as that a given arrangement of 3D rectangular pieces while limiting reasonable cost capacities. Here, we are focusing on the minimization of the aggregate volume of 3D bite the dust. In this paper, another initial topological structure is presented utilizing weighted coordinated chart of a floor planning issue in 3D VLSI physical plan. …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 1, 2017 · pp. 6–17 Read article
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BER Performance Comparison of Coded Communication Systems under Different Turbulence Coditions of Free Space Optical Channel
Abstract: AbstractThe congestion and the limitations on bandwidths of the radio spectrum have posed a constraint for the growth of radio wireless systems. Wireless optical communication, also known as free space optical communication (FSO), is believed to be a long-term option for many wireless communication applications. Atmospheric turbulence is generally considered to be multiplicative noise source that reduces the capability of receiver to estimate the information contained in the modulated optical …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 1, 2014 · pp. 1–6 Read article
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Doctrine of Signature - A key in Discovering the Therapeutical Effect of Zornia gibbosa Span
Abstract: Abstract According to Doctrine of signatures the herbs that resemble various parts of the body can be used to treat ailments of that part of the body. The theme of natural objects' shapes having significance is very old and can be correlated with “Purushoayam Lokasammitah” (man is epitome of universe) of Ayurveda. In Shatpat Bhrahman, a reference regarding functional correlation of various parts of the trees to that of human …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 3, Issue 1, 2014 · pp. 30–34 Read article
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Anthropogenic Intensification and Emerging Air Pollution Patterns across the Western Himalaya: Multi-Year Spatiotemporal Case Study
Abstract: Anthropogenic intensification is profoundly impacting air quality within vulnerable mountain ecosystems, yet the availability of long-term, high-resolution data from the Western Himalaya is strikingly limited. This study provides a detailed multi-year (2020-2024) spatiotemporal analysis of particulate matter (PM10 and PM2.5), nitrogen oxides (NOₓ), ammonia (NH3), and ozone (O3) concentrations across contrasting anthropogenic settings—specifically, tourist influx zones such as Dharamshala and industrial hotspots like Damtal in Himachal Pradesh, India. Key pollutants …
Published in International Journal of Atmosphere · Vol. 3, Issue 2, 2026 · pp. 7–25 Read article
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Synthesis, Characterization and Antibacterial Activity of Mono- and Binuclear Co(II) and Cr(III) Mixed-Ligand Complexes Derived from α-Amino Acid and 1,10- Phenanthroline with 1,3-Diaminopropan as a Spacer
Abstract: Mixed-ligand complexes of Co(II) and Cr(III) ions were synthesized from the reaction of metals chloride salts with α-amino acid (H2L1) as a primary ligand and 1,10-phenanthroline (L2) as secondary ligand. The ligand 2-(benzo[d]thiazol-2-ylamino)-2-(2-hydroxynaphthalen-1-yl) acetic acid (H2L1) has been synthesized from the condensation reaction of inobenzothiazol with 2-hydroxy-1-naphthaldehyde in the presence of HCN as three components–one pot reaction. H2L1 considered as a tridentate chelater of ONO-coordination binding type toward the metals, …
Published in Journal of Polymer & Composites · Vol. 11, Issue 2, 2023 · pp. 107–120 Read article
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Development of Spanish Version of Home-Based Video Module of Balance Exercises for Peripheral Vestibular Disordered Patients
Abstract: Any disturbances affecting one or more of the balance organs lead to imbalance difficulties and as a consequence, the quality of life of the affected individuals can be seriously affected, especially if the episodes end with injuries or even fatal accidents. Bal Ex is the first home-based video guided workout that was created by Zainun and her colleagues in 2009. Ten languages are currently supported by Bal Ex, including Cantonese, …
Published in International Journal of Brain Sciences · Vol. 1, Issue 2, 2024 · pp. 33–41 Read article
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Analyzing The Electromagnetic Transients and Corona Performance of Long Overhead Lines with Multiple Tower Spans
Abstract: This paper addresses the simulation of the electromagnetic transients developed in an important class of non-uniform high voltage power lines. The resulting information is of paramount importance for the proper planning, design, operation and protection of electric power networks. It deals particularly with long overhead high voltage transmission lines composed of several tower spans which are connected in cascade. The presented approach considers eventually existing localized corona discharges at some …
Published in International Journal of Electrical and Communication Engineering Technology · Vol. 3, Issue 1, 2025 · pp. 35–44 Read article
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Assessment of Spatial Variations in Water Quality and Environmental Impacts on Freshwater Ecosystems A Case Study of Lakes Around Puducherry
Abstract: This study examines the water quality of Kanagan Lake, Osuteri Lake, and the Chunnambar River to evaluate environmental changes and their significance to Puducherry's ecosystem. A multidisciplinary approach was employed to assess key water quality parameters, including pH, dissolved oxygen, nutrient levels, and pollutant concentrations, providing a comprehensive understanding of the ecological health of these water bodies. The analysis revealed significant spatial variations in water quality across the sites, driven …
Published in Journal of Water Resource Engineering and Management · Vol. 12, Issue 1, 2025 · pp. 1–15 Read article
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Electromagnetic Transients in Compensated Overhead Lines with Multiple Tower Spans
Abstract: This paper addresses the analysis of the electromagnetic transients developed in an important class of non-uniform high-voltage power lines. It deals particularly with compensated long overhead high- voltage transmission lines composed of several tower spans, which are connected in cascade. The derived mathematical model leads to a system composed of simultaneous partial differential and algebraic equations, which can be solved numerically in terms of parametric functions using the software Mathematica’s …
Published in Trends in Electrical Engineering · Vol. 15, Issue 2, 2025 · pp. 1–9 Read article
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Micro Level Mobility Intervention in Urban Spatial Structure in Reducing GHG Emissions: A Case of The City of Lucknow, Prayagraj and Varanasi
Abstract: In contemporary times, the Greenhouse Effect has emerged as a paramount concern in urban areas. With India undergoing rapid urbanization, cities are witnessing soaring temperatures. Greenhouse gas emissions are one of the main causes of the Greenhouse Effect. India stands among the highest emitters of GHGs, primarily stemming from the energy sector, particularly in electricity generation. The period from 2005 to 2018 saw a noteworthy surge in India's emissions, largely …
Published in Trends in Transport Engineering and Applications · Vol. 12, Issue 3, 2025 · pp. 25–33 Read article
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Invisible Shield: How the Atmosphere Keeps Us Safe from Space
Abstract: Invisible Shield shows us how incredible Earth's atmosphere is at keeping us safe from space threats. The atmosphere is a moving, multi-layered shield that keeps us safe from harmful solar radiation and burns up meteoroids before they impact the ground. This page discusses about the science behind climate control, magnetic interactions, and atmospheric chemistry. It depicts how various systems work together to keep the ground stable. It also talks about …
Published in International Journal of Atmosphere · Vol. 2, Issue 2, 2025 · pp. 39–49 Read article
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Urban Green space Site Suitability analysis of Angul City, Odisha – A Geospatial Approach
Abstract: The urban ecological system is crucial for human survival in cities. Residents receive various services directly or indirectly from the functions of ecosystems, known as ecosystem services. Heat stress in urban areas can be particularly harmful, as the negative effects of increasing urbanization lead to significant temperature changes that impact both vulnerable species and human health. While there are several methods, such as modifying roof materials and using lighter colors, …
Published in Journal of Remote Sensing & GIS · Vol. 17, Issue 1, 2026 · pp. 16–24 Read article
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The Effect of Spatial Distribution of Public Amenities on Residential Property Rental Value
Abstract: In major cities around the world, the rental value has indeed been increasing at an unprecedented rate because of the rising demand for residential properties in urban areas. Residential building characteristics, neighborhood characteristics, accessibility factors, and amenities are all factors that influence residential rental value. These amenities lead to rent differentials. The links that exist between residential property rental values and various physical and locational dwelling features, amenities, and so …
Published in International Journal of Land · Vol. 3, Issue 1, 2026 · pp. 28–37 Read article
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Spatiotemporal Modeling of Soil Erosion Under Agricultural Expansion in the Amravati Basin, India Using RUSLE–GIS
Abstract: Agricultural expansion and soil erosion are important environmental issues in areas where agriculture is a major source of livelihood. This study analyzes the spatial and temporal patterns of soil erosion in the Amravati Basin of Maharashtra and evaluates the impact of agricultural expansion using the Revised Universal Soil Loss Equation (RUSLE) integrated with Geographic Information System (GIS) techniques. Multi-source data, such as satellite imagery, rainfall records, soil characteristics, and topography …
Published in International Journal of Land · Vol. 3, Issue 1, 2026 · pp. 50–62 Read article