Growth, photoluminescence, lifetime, and laser damage threshold studies of 1, 3, 5-triphenylbenzene (TPB) single crystal for scintillation application

The 1, 3, 5-triphenylbenzene (TPB) single crystal has been grown using slow cooling seed rotation technique. Optical transmittance of the grown crystal was obtained from UV-Visible analysis. The grown TPB crystal has good transmission in the entire visible region with a lower cutoff wavelength of 330 nm. The solubility of TPB material was determined using toluene as a solvent with different temperatures. The full width at half maximum is 18 arcsec, which indicates that the crystal is of good quality. The TPB crystal was excited (lambda (exc)) at 307 nm, and the corresponding emission (lambda (em)) has been observed at 352 nm. The laser-induced damage threshold (LDT) value of grown crystal is 1.25 GW/cm(2). Third-order nonlinear optical susceptibility chi (3) is determined using the Z-scan technique as 3.07422x10(-09) esu. The TPB crystal proves its suitability for scintillation applications and optoelectronic device fabrications

Utilizing Schaefer's fixed point theorem in nonlinear Caputo sequential fractional differential equation systems

In the present study, established fixed-point theories are utilized to explore the requisite conditions for the existence and uniqueness of solutions within the realm of sequential fractional differential equations, incorporating both Caputo fractional operators and nonlocal boundary conditions. Subsequently, the stability of these solutions is assessed through the Ulam-Hyers stability method. The research findings are validated with a practical example that corroborate and reinforce the theoretical results

Applying fixed point techniques to solve fractional differential inclusions under new boundary conditions

Many scholars have lately explored fractional-order boundary value issues with a variety of conditions, including classical, nonlocal, multipoint, periodic/anti-periodic, fractional-order, and integral boundary conditions. In this manuscript, the existence and uniqueness of solutions to sequential fractional differential inclusions via a novel set of nonlocal boundary conditions were investigated. The existence results were presented under a new class of nonlocal boundary conditions, Carathéodory functions, and Lipschitz mappings. Further, fixed-point techniques have been applied to study the existence of results under convex and non-convex multi-valued mappings. Ultimately, to support our findings, we analyzed an illustrative example

Hollow three-dimensional model for fuel reduction in aviation industry

In the past two years, the pandemic situation has affected the aviation industry drastically. This situation starts to change, gradually, which is about to highly increase the international air travel around the world. Commercial air transport emission contributes a significant amount to global warming. Hence, in this research, to reduce the fuel consumption in commercial aircraft the aerodynamic surface of the wing is improved with the help of a hollow model in three dimensions. This biomimetic model named Raw Riblet was derived from a shark’s skin texture. The cross-section of the wing was (NACA 0012) designed and the Raw Riblet model was implemented in two different ways, computationally, and formulated biomimetic aerofoil models such as BRR and LRR (0.455). All these aerofoil models were analysed in high-speed airflow, computationally, and the aerodynamic performance values were noted. All the computational results were validated, and the result analysis showed a promising decrease in viscous drag of up to 11%. Both biomimetic models performed well in disturbance reduction when compared to the NACA model. This improved aerodynamic surface with reduced drag would decrease the fuel consumption in aircraft. This computational model would help us to fight the war against global warming

Prevalence of dental caries among school-going children in Namakkal district: A cross-sectional study

Aim: The aim of this study is to determine the prevalence of dental caries in primary teeth among 4-6 years old school going children in the Namakkal District. Materials and Methods: The study covered a total of 850 school going children in a total of 26 schools in the Namakkal district of Tamil Nadu. The age group selected for this study ranged from 4 to 6 years of age. Each child was examined in their respective schools by one of the four calibrated examiners and decay, missing and filled teeth (dmft) index was recorded along with demographic details. This study was done in September-October 2013 in a span of 1 month duration. Results: Of 850 children examined, 560 (65.88%) children had dental caries. Mean dmft score was 2.86. Prevalence of dental caries was higher in boys (69.6%) than in girls (61.5%). The untreated decay teeth accounted for 92.4%. Conclusion: The prevalence of dental caries among 4-6 years old children is high in the Namakkal district. The need for the creation of dental awareness among children and their primary caregivers is crucial and the need for developing immediate oral health promotion strategies including an increase in school dental health programs is recommended

Occurrence of Giant Isopod Bathynomus Giganteus A. Milne Edwards 1879 in the Chennai Coastal Waters

Volume: 104Start Page: 368End Page: 36

Nonsyndromic oligodontia in siblings: A rare case report

A syndrome is a medical condition that is characterized by a particular group of signs and symptoms, involving several organ systems. Oligodontia is defined as the developmental absence of six teeth or more, excluding third molars. Oligodontia can be classified as syndromic or nonsyndromic. Nonsyndrome oligodontia is a developmental dental anomaly without involvement of other organs. The consequences of missing teeth include abnormal occlusion or altered facial appearance, which can cause psychological distress in some patients. The management of oligodontia usually requires a multidisciplinary approach. The present article reports a case of oligodontia in siblings of the same family with no apparent systemic abnormalities

Expeditious and eco-friendly hydrothermal polymerization of PEDOT nanoparticles for binderfree high performance supercapacitor electrodes

Poly(3,4-ethylenedioxythiophene) (PEDOT) is a promising conjugated polymer that has attracted attention because of its outstanding electronic properties, useful for a wide range of applications in energy storage devices. However, synthesis of high-quality PEDOT occurs via vapour phase polymerization and chemical vapour deposition techniques using extrinsic hard templates or complicated experimental setups. This study introduces a simple hydrothermal polymerization technique using ferric chloride (FeCl3) as an oxidizing agent to overcome the above drawback, which results in good conductive, crystalline PEDOT nanodendrites and nanospheres. The effects of varying the molar ratio of FeCl3 oxidant were investigated in terms of the structural, morphological and electrochemical properties of PEDOT. The supercapacitive performance of the as-polymerized PEDOT nanostructures was determined by fabricating an electrode without the aid of organic binders or conductive additives. PEDOT nanodendrites polymerized using 2.5 molar ratio of FeCl3 demonstrated enhanced electrochemical performance with a maximum specific capacitance of 284 F g-1 with high energy density of 39.44 W h kg-1 at 1 A g-1 current density in 1 M H2SO4 electrolyte. Moreover, the sample possessed higher conductivity, better specific surface area, improved electrochemical properties, comparable crystallinity, and excellent cycling stability after 5000 charge/discharge cycles than the other PEDOT nanostructures. Importantly, the results establish that these materials afford good redox behaviors with better conductivity suitable for the development of an organic electrode-based supercapacitor with high specific charge capacity and stability

Electrochemical polymerization of chloride doped PEDOT hierarchical porous nanostructure on graphite as a potential electrode for high performance supercapacitor

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