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Subspace graph topological space of graphs
A graph topology defined on a graph G is a collection T of subgraphs of G which satisfies the properties such as K0, G ? T and T is closed under arbitrary union and finite intersection. Let (X, T ) be a topological space and Y ? X then, TY = {U ? Y: U ? T } is a topological space called a subspace topology or relative topology defined by T on Y. In this P1 we discusses the subspace or the relative graph topology defined by the graph topology T on a subgraph H of G. We also study the properties of subspace graph topologies, open graphs, d-closed graphs and nbd-closed graphs of subspace graph topologies. 2023, Proyecciones. All Rights Reserved. -
Subspace spanning graph topological spaces of graphs
A collection of spanning subgraphs TS, of a graph G is said to be a spanning graph topology if it satisfies the three axioms: (Formula Presented) where, n = |V (G)|, the collection is closed under any union and finite intersection. Let (X, T ) be a topological space in point set topology and Y ? X then, TY = {U ? Y: U ? T } is a topological space called a subspace topology or relative topology defined by T on Y. In this paper we discusses the subspace spanning graph topology defined by the graph topology TS on a spanning subgraph H of G. 2023, Proyecciones. All Rights Reserved. -
A study on graph topology
The concept of topology defined on a set can be extended to the field of graph theory by defining the notion of graph topologies on graphs where we consider a collection of subgraphs of a graph G in such a way that this collection satisfies the three conditions stated similarly to that of the three axioms of point-set topology. This paper discusses an introduction and basic concepts to the graph topology. A subgraph of G is said to be open if it is in the graph topology TG. The paper also introduces the concept of the closed graph and the closure of graph topology in graph topological space using the ideas of decomposition-complement and neighborhood-complement. 2023 Azarbaijan Shahid Madani University. -
Induced signed graphs of some classes of graphs
A signed graph is a graph with positive or negative signs assigned to edges. An induced signed graph is a signed graph constructed from a given graph according to some pre-defined protocols. An induced signed graph of a graph G is a signed graph in which each edge uv re ceives a sign where : V(G) Z. In this paper, we discuss two types of induced signed graphs and determine the structural properties of these signed graphs such as balancing, clustering, regular-ity and co-regularity. 2020 Jangjeon Research Institute for Mathematical Sciences and Physics. All rights reserved. -
On degree product induced signed graphs of graphs
A signed graph is a graph with positive or negative signs assigned to edges. An induced signed graph is a signed graph constructed from a given graph according to some pre-defined protocols. An induced signed graph of a graph G is a signed graph in which each edge uv receives a sign (-1)|?(v)-?(u)|, where ?: V(G) ? ?. In this paper, we discuss degree product induced signed graphs and determine the structural properties of these signed graphs such as balancing, clustering, regularity and co-regularity. 2020 Author(s). -
SETTING NARRATIVE THROUGH INSTAGRAM POSTS: A STUDY OF BBC'S REPORTAGE ON AFGHANISTAN
Media organizations have an immense role to play in disseminating informa-tion and shaping perspectives across borders. Though the information revolution pro-vides us with many new opportunities, it also helps in establishing a single narrative through the cultural cultivation of popular media over time. Orientalism, in this manner, presents an image that the West created of the Near East centuries ago and these second-hand experiences are enhanced over the years by the powerful states and media organi-zations to maintain the established hegemony. This current study focuses on understanding the British Broadcasting Corporation's narrative and its ability to include and exclude certain historical facts while reporting on the Taliban's takeover of Afghanistan through Instagram posts. The study found BBC portraying a favorable image for the role played by the NATO allies in Afghanistan and described the Taliban as a sheer group of terror, barbaric, and inhumane organization, following extreme Sharia laws. 2022 Pluto Journals. All rights reserved. -
A Comprehensive Analysis of Digital Technologies for Climate Change
This study examines how digital technologies can help us to solve climate change through mitigation and adaptation. Through a literature review of the evolution of digital technologies from simple communication applications to artificial intelligence tools, this analysis identifies urgent applications needed at each stage of technological development and critiques their utility in climate action. The findings point out that the digital technologies have the potential to play a large role in combating climate change, but implementation faces challenges that need to be addressed through coordinated action internationally. The research concludes that by integrating approach that are combining of technological innovation and suitable policy frameworks presents climate action's most auspicious path forward. The Author(s), under exclusive license to Springer Nature Switzerland AG 2026. -
An efficient hybrid digital architecture for space vector PWM method for multilevel VSI
This paper presents an efficient, cost effective design implementation of a hybrid digital architecture for space vector pulse width modulation (SVPWM) method for multilevel inverters (MLIs). The SVPWM method is one of the most popular real time PWM method for three phase voltage source inverter (VSI). The implementation of SVPWM method becomes complex with an increase in the number of levels in a multilevel inverter. The SVPWM method for multilevel inverter is a multitask system. The main constraint when it comes to implementing SVPWM for multilevel inverters is the processing of dwell time computation and the generation of PWM gate signals for all of the switches with an accurate delay. A hybrid hardware structure consisting of a simple low-cost, low-power dsPIC micro controller (dsPIC 30F4011) and a state of the art Field Programmable Gate Array (FPGA) (Cyclone V 5CGXFC5C6F27C7N) is used to implement SVPWM. The proposed hybrid digital architecture utilizes the advantages and resources of the dsPIC and FPGA. The hybrid digital architecture meets the timing constraints of multitasking through synchronization and parallelism. A communication interface between the dsPIC and the FPGA reduces the design complexity. The software overhead for the communication interface remains fixed for any number of levels. The hybrid structure of the digital architecture provides scalability for the SVPWM method with more number of levels in multilevel inverter. The operation of the proposed hybrid digital architecture is experimentally validated with an optimized SVPWM method for a five level VSI. An optimized region identification algorithm and simple dwell time expressions are described for a five level SVPWM. The input DC of the five level VSI is obtained from a differential power processing (DPP) based PV system. Experimental results under different operating conditions are presented. 2020, The Korean Institute of Power Electronics. -
Digital transformation and sustainability in the age of industry 5.0: A strategic framework for business success
The fusion of digitalization and sustainability drives changes in retail operations during traditional purchases and e-commerce operations thus creating 5IR business models. 5IR establishes human-centered priorities as essential aspects along with automated systems and big databases. Modern e-commerce development has created new market space yet it struggles with serious environmental issues which are coupled with supply chain ethical problems as well as excessive carbon footprint and excessive packaging waste. The analysis studies how digitalization transforms retail operations and e-commerce by introducing sustainability elements in new business models. The segment evaluates the digitalization difficulties linked to data protection and environmental destruction through examination of modern efficiencies which combine organizational performance with social accountability. Analysis of present industrial trends along with case studies delivers business understanding about sustainable digital strategizing for long-term achievement through current market changes. 2026, IGI Global Scientific Publishing. -
Unveiling the Dual Potential of the MoS2@VS2 Nanocomposite as an Efficient Electrocatalyst for Hydrogen and Oxygen Evolution Reactions
Clean and reliable energy sources are essential amidst growing environmental concerns and impending energy shortages. Creating efficient and affordable catalysts for water splitting is a challenging yet viable option for renewable energy storage. Traditional platinum-based catalysts, while highly active, are quite expensive. Our study introduces two-dimensional (2D) MoS2@VS2 nanocomposites, developed using hydrothermal technique, as a bifunctional catalyst for the electrolysis of water into valuable products. Structural studies revealed the formation of MoS2@VS2 nanocomposites with a nanoflake-like structure, where MoS2 nanosheets grow on the VS2 surface. This 2D-based electrocatalyst demonstrated exceptional reaction kinetics, with low overpotentials of 265 mV for the hydrogen evolution reaction (HER) and 300 mV for the oxygen evolution reaction (OER) at 10 mA/cm2. Furthermore, the electrocatalyst displayed small Tafel slopes of 65 mV/dec and 103 mV/dec for HER and OER, respectively, along with excellent stability. The unprecedented catalytic activity stems from the synergistic effect between semiconducting MoS2 and metallic VS2. Density functional theory calculations confirmed that this synergy enhances the electrical conductivity, facilitating efficient electron transfer during the reaction and providing an abundance of exposed active sites. These results mold MoS2@VS2 nanocomposites as promising electrocatalysts for overall water splitting, paving the way for sustainable energy future. 2024 American Chemical Society. -
Review of Geopolymer Composites Synthesized Using Different Industrial By-products
Managing the substantial volume of industrial waste is challenging due to diminishing landfill capacity and associated risks to people and the environment. The optimal approach is to repurpose or find alternative applications for these waste products. Previous studies have investigated using industrial waste and chemicals to enhance soil stability. Common binders like cement, while offering significant stabilization potential, raise concerns about economic feasibility and environmental impact. Recently, theres a growing interest in low carbon emission cementing agents. This trend leads to using waste by-products for geopolymer binder production, potentially strengthening soft soil in an eco-friendly way. Unconfined compressive strength, vital in construction foundation design, has been a focus of extensive research to enhance soil strength over the years. This paper provides a brief overview of several studies that highlight the utilization of various industrial waste products in the synthesis of geopolymers. Also, this comprehensive review centers on investigations related to the application of geopolymers derived from industrial solid waste as a soil stabilizer. The review delves into the impact of various parameters, including different percentage mixes (%), molarity (M), temperature (T), curing time (days), on the unconfined compressive strength of the soil. It has been observed that, a variety of industrial by-products like Bagasse ash (BA), Blast furnace slag (BFS), Egg shell powder (ESP), Fly ash (FA), Ground Granulated Blast Furnace Slag (GGBS), Iron Ore Tailings (IOT), Metakaolin (MK), Palm Oil Fuel Ash (POFA), Recycled Asphalt Pavement (RAP), Rice husk ash (RHA), Red Mud (RM), etc. can serve as valuable source materials for geopolymerization. In most of the studies, the commonly utilized alkaline activator consists of a blend of sodium hydroxide and sodium silicate solution. The unconfined compressive strength of geopolymerized industrial waste products relies on specific parameters, including optimal alkaline concentration, activator liquid to raw material mass ratio, and sodium silicate to sodium hydroxide solution ratio. Diverse curing conditions are also necessary, varying with raw materials and activators. The Author(s), under exclusive licence to Chinese Society of Pavement Engineering 2024. -
Tuning the Electrocatalytic Properties of VO2(B): Role of W Doping in Bifunctional Water Splitting
Vanadium-based systems have evoked considerable interest in researchers due to their potential for advanced renewable energy technologies. However, the possibilities of VO2(B) as an electrocatalyst for water splitting are yet to be explored, even though it is an excellent candidate as an electrode material for various batteries. In this work, the bifunctionality of VO2(B) is investigated in overall water electrolysis, focusing on its enhanced catalytic activity when doped with transition metal atoms such as tungsten (W). Hydrothermally synthesized W-doped VO2(B) nanoflakes demonstrate superior hydrogen evolution (HER) and oxygen evolution reactions (OER), confirming this enhanced catalytic activity. For an optimal W doping, the overpotential values decreased from 518 to 335mV and 435 to 348mV for hydrogen evolution and oxygen evolution, respectively. These observations are supported by the lowest Tafel slope values of 115 and 74mVdec?1 for HER and OER, respectively, and the lowest charge transfer resistance of 47 ?. The excellent stability of the nanostructures revealed by the chronopotentiometry demonstrates their reliable performance over extended periods. Together, these findings highlight that W-doped VO2(B) nanostructures are highly effective candidates as electrocatalysts for overall water-splitting applications. 2025 Wiley-VCH GmbH. -
Enhancing the Strength of Geopolymer Composites Synthesized from Iron Ore Tailings and Fly Ash for Use as Subgrade Material in Pavement Construction
As the idea of sustainable pavement becomes more important, an increasing number of industrial waste products and recycled materials are being used in the pavement industry to conserve natural resources. This study evaluates the potential use of iron ore tailings (IOT) blended with fly ash (FA) and activated with NaOHNa?SiO? solutions as a liquid alkaline activator (L) to synthesise IOT-FA geopolymers, which can be used as a sustainable material for the pavement subgrade layer. The influence of FA replacement levels and alkaline activator ratios on the geotechnical and microstructural behaviour of IOT was examined through compaction, unconfined compressive strength (UCS), and California bearing ratio (CBR) tests, supported by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) analyses. The results show that 20% FA replacement gives the optimal mix, resulting in a 28-day UCS improvement of over four times that of untreated IOT due to enhanced geopolymerization. The liquid alkaline-activated mixes achieved CBR values of ? 8, meeting IRC requirements for subgrade applications. SEM analysis revealed dense gel formation and improved particle bonding, while XRD results indicate the development of geopolymeric reaction products. TCLP results indicate that metal leaching remained within permissible limits, establishing the environmental safety of the developed composite. The thickness of the pavement layer was designed using IITPAVE software based on CBR values and assessed against IRC:372018 criteria. The analysis indicated a reduction in layer thickness for various daily commercial vehicle counts ie, CVPD (450,1000), across all evaluated combinations. Overall, the study demonstrates that alkaline-activated IOTFA mixtures offer a technically viable and sustainable alternative for pavement subgrade construction. Chinese Society of Pavement Engineering 2026. -
Template-based classification of SDSS-GALEX point sources
We have classified a sample of 37,492 objects from SDSS into QSOs, galaxies and stars using photometric data over five wave bands (u, g, r, i and z) and UV GALEX data over two wave bands (near-UV and far-UV) based on a template fitting method. The advantage of this method of classification is that it does not require any spectroscopic data and hence the objects for which spectroscopic data is not available can also be studied using this technique. In this study, we have found that our method is consistent by spectroscopic methods given that their UV information is available. Our study shows that the UV colours are especially important for separating quasars and stars, as well as spiral and starburst galaxies. Thus it is evident that the UV bands play a crucial role in the classification and characterization of astronomical objects that emit over a wide range of wavelengths, but especially for those that are bright at UV. We have achieved the efficiency of 89% for the QSOs, 63% for the galaxies and 84% for the stars. This classification is also found to be in agreement with the emission line diagnostic diagrams. 2018, Indian Academy of Sciences. -
Mid-infrared variability of ?-ray emitting blazars
Using data from the Wide-field Infrared Survey Explorer, we studied the mid-infrared (mid-IR) 3.4 ?m (W1-band) and 4.6 ?m (W2-band) flux variability of ? -ray emitting blazars. Our sample consists of 460 flat spectrum radio quasars (FSRQs) and 575 BL Lacertae (BL Lac) objects. On intraday time-scales, the median amplitude of variability (? m) for FSRQs is 0.04+0.03?0.02 and 0.05+0.03?0.02 mag in W1 and W2 bands. For BL Lacs, we found median ? m in W1(W2) bands of 0.04+0.01?0.02 (0.04+0.02?0.02) mag. On long time-scales, for FSRQs we found a median ? m of 0.44+0.28?0.27 and 0.45+0.27?0.27 mag in W1 and W2 bands, while for BL Lacs, the median values are 0.21+0.18?0.12 and 0.22+0.18?.011 mag in W1 and W2 bands. From statistical tests, we found FSRQs to show larger ? m than BL Lacs on both intraday and long time-scales. Among blazars, low synchrotron peaked sources showed larger ? m compared to intermediate synchrotron peaked and high synchrotron peaked sources. The larger ? m seen in FSRQs relative to BL Lacs on both intraday and long time-scales could be due to them having the most powerful relativistic jets and/or their mid-IR band coinciding with the peak of the electron energy distribution. BL Lacs have low power jets and the observational window too traces the emission from low-energy electrons, thereby leading to low ? m. In both FSRQs and BL Lacs predominantly a bluer when brighter behaviour was observed. No correlation is found between ? m and black hole mass. 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society -
Digital Marketing Strategies: Effectiveness on Generation Z
The paper examines the constructs of digital marketing strategies on two aspects. Exploring the numerous digital marketing strategies related to Generation Z through a comprehensive desk review and archival research and confirming the explored factors to create a valid and measurable instrument.It is important to quantify and develop a scale to measure the effectiveness of digital marketing strategies on Generation Z. The first section of the study is exploratory factor analysis (EFA), establishing the effectiveness of digital marketing strategies on Generation Z. The second section deals with Confirmatory Factor Analysis (CFA), confirming the factors coined through exploratory factor analysis. The dimensions identified in the research can help marketers create exclusive digital marketing strategies to target Generation Z. 2020 SCMS Group of Educational Institutions. All rights reserved. -
Unlocking the Antimicrobial, Antifungal, and Anticancer Power of Chitosan-Stabilized Silver Nanoparticles
Silver nanoparticles (AgNPs) have become a research focus due to its antimicrobial, anticancer applications and cost-effective properties. In this study the effectiveness of green synthesis of NPs using biological macromolecule chitosan which isacting as a reducingcum stabilizing agent is carried out. An in-depth analysis of the synthesized AgNPs was conducted using a variety of sophisticatedcharacterization techniques such as UV-visible spectroscopy, particle size analysis, zeta potentialmeasurements, transmission electron microscopy (TEM), photoluminescence, and Fourier transform infrared (FTIR) spectroscopy. The antimicrobialactivity of the formulated AgNPs were inspected against two human pathogenic strains. In the antimicrobial activity, the synthesized AgNPs exhibited a reduction in the growth of both themicrobes. The minimum inhibitory concentration (MIC) of 1.22 M was observed for both Candida albicans and Mycobacterium smegmatis. Consequently, AgNPs may be used as an opportunity for modern-day antibiotics to treat infections due to human pathogens. Antiproliferative analysis revealed that AgNPs showed antiproliferative characteristics against MDA-MB-231 cells compared to the control. Such AgNPs have an anticancer effect and are likely to be used as smart drug delivery mediators to treat late-stage cancer. 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature. -
Ion-imprinted chitosan-stabilized biogenic silver nanoparticles for the electrochemical detection of arsenic (iii) in water samples
Arsenic is one of the most harmful heavy metals, and needs constant monitoring and control. A susceptible and selective sensor for arsenic (iii) detection in polluted water samples has been developed by using chitosan-stabilized silver nanoparticles (AgNPs). A glassy carbon electrode (GCE) is modified with chitosan-stabilized silver nanoparticles, which provides sufficient sites for interaction with the analyte. The synthesized silver nanoparticles are characterized using different characterization techniques, such as UV-Visible spectroscopy, transmission electron spectroscopy (TEM) and particle size distribution. The particle size and polydispersity index (PDI) value of the chitosan stabilized silver nanoparticles are found to be 6 nm and 0.3, respectively, which enhances the electroactive surface area and hence the sensor sensitivity. The ion imprinting technique is used to improve the selectivity of the sensor. The arsenic sensor is found to be very selective in the presence of other possible interferents like Pb2+, Zn2+, Cu2+, Ag+ and Fe2+. The detection of As(iii) was performed using differential pulse anodic stripping voltammetry (DPASV) and the detection limit was found to be 11.39 pM. The developed sensor is successfully tested for the picomolar level detection of arsenic (iii) in different water samples. 2023 The Royal Society of Chemistry. -
Advanced Electrochemical Detection of 2,4-dichlorophenol in Water with Molecularly Imprinted Chitosan Stabilized Gold Nanoparticles
2,4-Dichlorophenol (2,4-DCP) is a hazardous chemical that can be passed down to offspring. Because 2,4-DCP degrades slowly and can be passed down to future generations, its a pesticide that needs to be continuously monitored and managed. With the use of chitosan-stabilized AuNPs on a glassy carbon electrode and the molecular imprinting technique, an effective electrochemical sensor has been built for the selective determination of 2,4-DCP in different aqueous samples. The analytes electroactive surface area and number of interaction sites are both increased by the AuNPs. The formulated AuNPs were characterized using several material characterization techniques. Molecularly imprinted nanomaterials provided the selectivity against other interfering chlorophenols. With a detection limit of 6.33 nM and a broad linear dynamic range of 21.09 to 310 nM, 2,4-DCP was found using differential pulse voltammetry. Without interference from structural analogs, the sensor was effectively evaluated in a variety of contaminated water samples. 2024 The Electrochemical Society (ECS). Published on behalf of ECS by IOP Publishing Limited. All rights, including for text and data mining, AI training, and similar technologies, are reserved. -
Recent Advances in Nanomaterials Based Molecularly Imprinted Electrochemical Sensors
Nanotechnology and molecular imprinting both are omnipresent in the modern scientific world. Molecular recognition in the biological systems was mimicked to an extreme extent with its difficulties through molecular imprinting. Solving the problems related to this mimicking was the goal of science and technology. Some challenges like difficulties with the imprinting of protein, poor compatibility with aqueous environments, template leakage, and heterogeneous populations of binding sites in the polymers that contribute to a high level of nonspecific binding sites were addressed with recent advancement in the modern era. These issues were solved later with nano level instrumentations and inventions. Different types of nanomaterials were employed for this research on molecular recognition through MIPs to enhance selectivity, sensitivity and stability to specific systems such as sensors. This review paper attempts to give all the recent advances in molecular imprinting and the potential of nanomaterials in electrochemical sensors. 2021 Taylor & Francis Group, LLC.