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Characterization of Line-Cut Signed Graphs
A signed graphS= (Su, ?) consists of an underlying graph Su and a function ?: E(Su) ? { + , - }. For a graph G, its lict graph written as Lc(G) is the intersection graph ?(E(G) ? C(G)). For a signed graph S, its line-cutsigned graph (in short called lict signed graph) is denoted by Lc(S) has underlying graph Lc(Su) and two vertices u and v joint by negative edge if u and v both are negative adjacent edges of S or u is a negative edge incident to a cut-vertex v of negative degree odd in S and by positive edge otherwise, here C(S) is the set of cut-vertices of S. In this paper, we establish structural characterization of lict signed graphs Lc(S). 2020, The National Academy of Sciences, India. -
Characterization of interval-valued fuzzy bridges and cutnodes
In this paper, we characterize interval - valued fuzzy bridges and interval-valued fuzzy cutnodes in terms of ? strong arcs. We discuss about the behaviour of arcs in a strongest path of an interval - valued fuzzy graph. An example is provided to prove that strongest paths are not in general related to strong paths in an interval - valued fuzzy graph. Finally we give a particular condition under which strong paths and strongest paths are equivalent. 2019 Author(s). -
Characterization of Erd?s matrices by their zero entries
An Erd?s matrix E is a bistochastic matrix whose sum of squares of entries (Frobenius norm squared) equals its maxtrace (maximum value of the trace of ?E, as ? varies over permutation matrices). We characterize all Erd?s E by the patterns of their zero entries; showing that each such skeleton has at most one E. We present an algorithm to find all n Erd?s matrices, which finds them up to n?5 quickly and also size n=6. We further show some presently known RCDS matrices (E in which the trace of ?E remains constant across all the permutations that avoid every zero-entry position in E) to be Erd?s. 2026 Elsevier Inc. -
Characterization of diesel soot from the combustion in engine by X-ray and spectroscopic techniques
Carbon nanomaterials formed during the combustion of Diesel inside engine is characterized by X-ray diffraction (XRD) and spectroscopic techniques. The soot are collected from the Engine and washed with Acetone. Carbon Nanomaterials produced from diesel soot show the morphology of carbon nanospheres mixed with carbon nanotubes. X-ray diffraction investigation shows the presence of carbon nanotubes in association with amorphous nanomaterial. EDS analysis of Diesel soot indicates that the soot particles to be composed of primarily carbon and oxygen along with hydrogen. NMR spectrum of the soot reveals significant aliphatic component with predominance of methyl and methylene groups on ? and ? positions to aromatic rings. There is significant fraction of hydrogen on the ? position at 0.864 ppm, which suggests the existence of large aliphatic chains or saturated rings joined to aromatic rings. The IR spectrum shows characteristic signals in the region 1700-1000 cm -1, where the most important one correspond to C=O stretching of carboxylic acids at 1639 cm -1, C=C stretching of aromatic groups at 1533 cm -1, and aliphatic C-H plane deformation of CH 2/CH 3 groups at 1380 cm -1 and 1445 cm -1 respectively. 2012 by ESG. -
Characterization of Diesel soot from the combustion in engine by X-ray and spectroscopic techniques
International journal of Electrochemical science . Vol. 4, Issue 4, pp. 3215-3221 ISSN No. 1452-3981 -
CHARACTERIZATION OF BOUNDS FOR ??ADJACENCY ENERGY OF A GRAPH
Recently Nikiforov et.al [9] put forward the ??adjacency energy of a graph G. In this paper, we continue the work on ??adjacency energy and obtain bounds for this new parameter in terms of order, size and the first Zagreb index. Indian Mathematical Society, 2023. -
Characterization of bioactive compounds from Saraca asoca and their antibacterial activity against fish pathogens in Oreochromis niloticus
Saraca asoca, known for its therapeutic properties in Ayurveda, is the focus of this study, aiming to identify and quantify the bioactive compounds in its leaf extract using Gas Chromatography-Mass Spectrometry (GC-MS) and Fourier Transform Infrared Spectroscopy (FTIR). The study also investigates the antibacterial efficacy of methanol, ethanol and acetone extracts of S. asoca against fish pathogens in Oreochromis niloticus like Vibrio alginolyticus, Streptococcus pyogenes, Pseudomonas fluorescens and Aeromonas hydrophila through the well-diffusion method. GC-MS confirmed the presence of compounds such as 3- hydroxy biphenyl, n-hexa decanoic acid, oleic acid, octadecanoic acid, 4,5-diethyl octane and 9-tetradecen-1-ol. In contrast, FTIR spectra revealed several significant peaks, indicating the presence of specific functional groups in the S. asoca leaf fraction. The results exhibited high absorbance in the wavenumber ranges of 4000-3500 cm-1, 3000-2500 cm-1, 1800-1500 cm-1 and 1100-950 cm-1. The findings of the antibacterial assay suggest that the methanolic extract exhibited a strong inhibitory effect against bacterial pathogens, with zones of inhibition ranging from 6 0.21 to 18 0.57 mm in size. These results indicate that S. asoca leaf extract contains bioactive compounds effective against the pathogenic bacteria in O. niloticus, supporting the growing shift towards reducing antibiotic use in aquaculture. (2025), (Horizon e-Publishing Group). All rights reserved. -
Characterization and Strength Assessment of Alkali-Activated Iron Ore Tailing Composite Bricks
The current study outlines a process for producing environmentally friendly bricks that can also compete successfully in today's highly competitive market. The use of iron ore tailings (IOT), which are typically disposed of as waste by the mining industry, is the subject of ongoing research for brick production. Bricks were made using IOT, which was obtained from iron ore mines in India's southern region. The study is based on the alkali-activation method of producing IOT bricks, which has been shown to be the most energy-efficient method of production. This is because, in contrast to the traditional method of producing bricks, the alkali-activation method emits fewer greenhouse gases. India has an abundance of iron ore deposits, which has resulted in extensive mining activities, which has resulted in an increase in waste generation, The waste is typically disposed of by being dumped in one of the dumping sites or dams near the mining area. These tailings pose a significant threat to the environment in their immediate vicinity. As a result, the use of IOT in brick manufacturing will reduce the mining industry's waste disposal burden. Furthermore, the use of IOT in the production of bricks will reduce the use of natural raw materials in the production of conventional bricks. Several types of brick composites were developed in this study by combining Ground Granulated Blast Furnace Slag (GGBS), Flyash, and IOT with a sodium silicate solution. Each raw material is analysed using particle size analysis (PSA), X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning electron microscopy (SEM. The newly developed IOT bricks were put through a series of tests to determine their strength and durability in accordance with Indian standards. The developed IOT bricks had a maximum compressive strength of up to 18.45N/mm2 while water absorption was not more that 12.6%. Furthermore, the bricks were subjected to a series of wetting and drying tests to determine their long-term durability in accordance with Brazilian regulations. Each of the results obtained was validated using microstructure analysis of the product that was developed. Furthermore, the study sought to determine the compression strength of alkali-activated IOT brick prisms when combined with mortar of varying strengths. Finally, it was determined that more than 50 percent of the IOT can be used in combination with GGBS, flyash, and sodium silicate solution as an alkali activator to produce high-quality bricks under ambient temperature curing conditions. -
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Characterization and properties of plant extract-derived nanostructured carbon materials
The remarkable features of carbon nanomaterials, which include graphene, fullerenes, carbon nanotubes (CNTs), and carbon nanofibers, have elevated them to the forefront of material science study. These nanoparticles are very desirable for a variety of applications, such as electronics, energy storage, composites, and biomedical devices, due to their exceptional mechanical, electrical, thermal, and chemical properties. This chapter offers a thorough rundown of the essential characteristics and cutting-edge methods for characterizing carbon nanomaterials. We examine the inherent qualities of several carbon nanostructures, emphasizing their surface chemistry, electrical and thermal conductivity, and mechanical strength. Every one of these characteristics is essential for figuring out whether carbon nanoparticles are appropriate for a given application. The chapter also covers cutting-edge characterization methods that are crucial for assessing the caliber and characteristics of carbon nanomaterials. AFM, X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and other spectroscopic techniques are covered in detail. These methods offer vital information on the shape, composition, purity, density of defects, and electrical characteristics of carbon nanomaterials. 2025 Elsevier Inc. All rights reserved. -
Characterization and comparison studies of Bentonite and Flyash for electrical grounding
Earthing or Grounding is an Electrical system consists of electrodes which serves as an electrical connection from an electric circuit in the system to the earth or ground. Traditional Earthing- where we mix charcoal and salt offers low resistance to the fault current flow developed from a Low operating Voltages. Since operating voltages are high now a days, Short circuit current also increased. Traditional method of Earthing is replaced by chemical Earthing.Bentonite which is mainly used in chemical Earthing serves the requirement of Low resistance Earthing pits and also have the property to retain the moisture. In this paper an attempt had been made to assure the Flyash usage in the grounding pit and this paper discusses the Characterization, Comparison and Field Studies on Earthing Pit constructed with Bentonite and Fly ash layers. 2015 IEEE. -
Characterization and Analysis of Carbon Fiber and Nano hBN Reinforced Hybrid Aluminium Metal Matrix Composites by Conventional Sintering
As mono composites focus solely on improving one property at a time, the significance of hybrid composites grows day by day. The incorporation of carbon fiber (CF) and nano hexagonal boron nitride (hBN) particles as reinforcement for Aluminium has gained significant popularity because of their superior properties. In this work, the AA 7050 is reinforced with carbon fiber and nano hBN and fabricated by powder metallurgy method. To achieve an effective nanoparticle distribution in the matrix, premixing of the particles was done. The reinforcements were effectively dispersed by ball milling, and the composite was created using a traditional powder metallurgy. Dispersion of the particles in the matrix was analyzed by optical microscope. The effect of adding reinforcement to the matrix was investigated using properties such as micro hardness and compression test, and wear characterization. A significant increase in mechanical and wear properties was achieved for the combination of 0.25 wt. % carbon fiber and 0.5 wt. % hBN addition due to the uniform dispersion of nano particles along with the carbon fiber presence. The microhardness, compressive strength and wear rate is improved by 33%, 66% and 54 % respectively than the bare alloy. This study provides insight into the importance of hybrid Aluminium nano composites for high strength applications. Author(s) 2024. -
Characteristics of Users Seeking Romantic Relationships on AI-Powered Dating Platforms and With AI Companions
AI now underpins nearly every major dating platform, influencing how people discover partners, express themselves, and form romantic bonds. This chapter explains why studying AI in romance has become essential, outlining how algorithmic matching, behavioural design, and personalisation shape digital relationships. It identifies key demographic groups, personality traits, and attachment styles that are drawn to AI-enhanced dating contexts, and examines their motivations, attitudes, and self-presentation patterns across various platforms. The chapter also explores the rise of artificial intimacy, showing how AI companions provide emotional safety, stability, and reinforcement that encourage ongoing engagement. Using psychological approaches, it discusses how users perceive AI as a romantic or supportive figure and how these perceptions interact with individual needs. Ultimately, the chapter highlights how user characteristics and AI design together drive the emergence of new forms of digital intimacy and their broader psychological and social implications. Copyright 2026, IGI Global Scientific Publishing. Copying or distributing in print or electronic forms without written permission of IGI Global Scientific Publishing is prohibited. Use of this chapter to train generative artificial intelligence (AI) technologies is expressly prohibited. The publisher reserves all rights to license its use for generative AI training and machine learning model development. -
Characteristics of chitin extracted from different growth phases of black soldier fly, Hermetia illucens, fed with different organic wastes
Insect chitin was isolated from different life stages of the black soldier fly Hermetia illucens, such as instar stages, prepupae and pupae, reared separately on fruit and vegetable waste substrates after removal of fat, protein and minerals. Chitin yield was high in prepupae fed with vegetable waste (11.78 0.13%) followed by fruit waste (6.82 0.36%). The extracted chitin was compared with a commercial chitin from shrimp by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and thermogravimetric analysis. The results revealed that both chitins from commercial shrimp source and the H. illucens had similar chemical structures and physicochemical properties indicating the H. illucens chitin samples to be of ?- chitin orientation type. With regards to the H. illucens samples, small physiochemical changes were noticed. Furthermore, the polymers derived from BSF are equivalent to commercial polymers in terms of purity and structural morphology, indicating their utility for industrial and medical applications. Thus, H. illucens prepupae is a promising alternative source of chitin. 2023, African Association of Insect Scientists. -
Characteristic Mode Analysis of Metallic Automobile Logo Geometry
This paper presents a characteristic mode analysis of a few popular automobile logo geometries. It is performed to get an insight into the physical behavior of those geometries which can be employed as a radiating element, such as an antenna. Such an analysis helps design multi-band and multi-mode antennas suitable for 5G sub-6 GHz bands. The resonant behavior, bandwidth capability, and modal current distribution analysis are presented for various modes of different automobile logo geometries, demonstrating that Audi, Suzuki, and Volkswagen logos show multi-band performance. Moreover, due to having symmetric modes, the BMW logo was found to be suitable for designing a circularly polarized antenna. 2023 IEEE. -
Characteristic Mode Analysis of Fashion Brands Conductive Logos as Potential Radiators
A few popular fashion brand logos, which can be employed as potential radiating elements, are investigated in this paper based on the theory of characteristic mode (TCM). Such an analysis would further help design multi-band wearable antennas within the frequency range from 1 to 6 GHz. The resonant behavior and bandwidth capability for various modes are presented and discussed. It is observed that all the studied logos demonstrate a first resonant frequency around 1.5 GHz, while both Lacoste and Louis Vuitton logos show wider modal bandwidths capabilities. 2023 IEEE. -
Characteristic Mode Analysis of Closed Metal Geometric Ring Shapes
In this study, the characteristic mode theory is used to better explain the physical behavior of a few simple closedshaped geometries. The bandwidth coverage, resonant behavior, and modal current distributions for several ringshaped geometries are shown and discussed. It has been demonstrated that the triangular, rectangular, and square ring geometries can result in multi-band performance, whereas the hexagonal, circular, square, and triangular rings are promising candidates for circularly polarized antenna designs. 2024 IEEE. -
Characteristic Equation Development for Conical Active Solar Still With/Without Photovoltaic Thermal for Sustainable Solution to Clean Water Scarcity: A Comparative Study
To address global water scarcity and promote sustainable freshwater solutions, a novel solar distillation system has been developed and numerically analyzed. Three cases namely (a) conical solar still (CSS) consisting of partially covered photovoltaic thermal (PVT) flat plate collectors (FPCs), (b) CSS with fully covered PVT-FPCs, and (c) CSS containing FPCs have been considered. Detailed thermal models for different cases have been developed, and the results are compared. An experimental validation of case (a) has been presented. The root mean square percentage deviation for water temperature, condensing cover temperature, and yield is obtained as 5.30%, 4.90%, and 9.11%, respectively. The conical geometry of the proposed system increases the condensing surface area and reduces the shading effect, improving distillation performance. Results show that the maximum collector outlet and basin water temperatures reached approximately 99.8 C and 95.2 C, respectively, at the mass flow rate of 0.04 kg/s and N = 8. Among the configurations, case (c) demonstrated the best performance, achieving a daily distillate yield of 6.44 kg and a maximum instantaneous efficiency of 88.28%. However, case (c) is not self-sustainable. In comparison, cases (a) and (b) recorded yields of 4.70 kg and 3.33 kg and maximum instantaneous efficiency of 79.76% and 25.32%, respectively. The suitability of cases (a) and (b) depends on the requirements of users. Case (a) is suitable when comparatively low electrical output and high yield are required, whereas case (b) is suitable when high electrical output and low yield are required. Copyright 2026 by ASME. -
Characterisation of Sn-Cl co-doped ?-Ga2O3 thin films deposited via spray pyrolysis and their application in UV detector devices
Ga2O3, an ultrawide bandgap semiconducting oxide, is currently emerging as a promising candidate for various applications, such as power devices, solar-blind UV detectors, high temperature oxygen sensors and biomedical imaging. One significant limitation hindering the application of Ga2O3 as a wide-bandgap semiconductor is its poor conductivity. In this work, we investigate whether doping with tin and chlorine can mitigate this condition. Sn-Cl co-doped ?-Ga2O3 thin films are deposited on glass substrates using spray pyrolysis technique. The deposited films are subjected to comprehensive analysis, including structural, optical and morphological measurements using techniques like X-ray diffraction, UV-Vis-NIR spectroscopy, X-ray photoelectron spectroscopy and EDX studies. Electrical properties are assessed using the four-probe method and Hall measurements. The best conductivity of 8.86 ??1m?1 is observed when 8.68 at% of Sn and 3.37 at% of Cl were co-doped into Ga2O3 (S(3)) and its optical band gap is calculated to be 4.65 eV. This is about five orders of improvement in conductivity as compared to that of pure Ga2O3 thin film deposited by the same method. Furthermore, we have constructed a deep UV detector utilizing doped ?-Ga2O3 thin films as the semiconducting absorbing layer. The detector demonstrated the highest responsivity of 2.54 10?4 A/W at 260 nm and the corresponding specific detectivity is 1.4 109 Jones. The current research validates the potential of Sn-Cl co-doped ?-Ga2O3 thin film as an excellent choice for UV detector application. 2024 Elsevier B.V. -
