IOSR-JAP   Volume-17 ~ Issue-6 ~ Nov. – Dec. 2025

ABSTRACT: Conventional aircraft design principles fail at micro-scales where viscous forces dominate and unsteady aerodynamic effects are critical. Yet nature has solved this challenge through 600 million years of evolutionary refinement. This creates an opportunity: translating biological flight principles into engineered systems. However, a significant gap exists between biological discovery and engineering implementation. Fragmented advances in different domains (aerodynamics, materials, control, sensing) lack systematic integration. This review bridges this gap by synthesizing....

Keywords: bio-inspired aerodynamics; leading-edge vortex; flapping wing micro-aerial vehicles; computational design; fluid-structure interaction

[1]. Birch, J. M., & Dickinson, M. H. (2001). Spanwise Flow And The Attachment Of The Leading-Edge Vortex On Insect Wings. Nature, 412(6848), 729–733.
[2]. Birch, J. M., & Dickinson, M. H. (2003). The Influence Of Wing-Wake Interactions On The Production Of Aerodynamic Forces In Flapping Flight. Journal Of Experimental Biology, 206(13), 2257–2272.
[3]. Bomphrey, R. J., & Godoy-Diana, R. (2018). Insect And Insect-Inspired Aerodynamics: Unsteadiness, Structural Mechanics And Flight Control. Journal Of The Royal Society Interface, 15(143).
[4]. Bomphrey, R. J., Nakata, T., Phillips, N., & Walker, S. M. (2017). Smart Wing Rotation And Trailing-Edge Vortices Enable High Frequency Mosquito Flight. Nature, 544(7648), 92–95.
[5]. Chen, L., Wu, J. H., & Cheng, B. (2019). Volumetric Measurement And Vorticity Dynamics Of Leading-Edge Vortex Formation On A Revolving Wing. Experiments In Fluids, 60, 12..

ABSTRACT: This article explains the effect of BaTiO3 on xBaTiO3-(78-x)Na2B4O7-10TeO2-10MoO3-2V2O5 (x=0-20 insteps of 5) glass systems. By using Phy-X computational technique LAC, MAC, HVL, MFP, Neff, Zeff, EBF and EABF were obtained over the photon energy range 0.015-15MeV. Both LAC and MAC were followed Beer Lambert’s law expect at some photon energies this was explained by K-absorption edges. The incorporation of BaTiO₃ was observed to significantly enhance the photon attenuation characteristics of the glass system. This is evidenced by a marked....

[1]. Shamsan SO, Sayyed MI, Gaikwad DK, Pravina PP. Attenuation Coefficients And Exposure Buildup Factor Of Some Rocks For Gamma Ray Shielding Applications. Radiat Phys Chem 2018;148:86–94. Https://Doi.Org/10.1016/J. Radphyschem.2018.02.026.
[2]. Al-Hadeethi Y, Sayyed MI. X-Ray Attenuation Features Of Some Tellurite Glasses Evaluated At Medical Diagnostic Energies. Appl Math Comput 2020;365:124712. Https://Doi.Org/10.1016/J.Amc.2019.124712.
[3]. Obaid, Shamsan & Gaikwad, Dhammajyot & Pawar, Pravina. (2017). Determination Of Gamma Ray Shielding Parameters Of Rocks And Concrete. Radiation Physics And Chemistry. 10.1016/J.Radphyschem.2017.09.022.
[4]. Zoulfakar, A.M. & Abdel-Ghany, Ahmed & Abou-Elnasr, T.Z. & Mostafa, A.G. & Salem, S.M. & El Bahnasawy, Hany. (2017). Effect Of Antimony-Oxide On The Shielding Properties Of Some Sodium-Boro-Silicate Glasses. Applied Radiation And Isotopes. 127. 10.1016/J.Apradiso.2017.05.007.
[5]. Glasses P. Vani A, G. Vinitha A, M.I. Sayyed B, C, Maha M. Alshammari D, N. Manikandan A. Effect Of Rare Earth Dopants On The Radiation Shielding Properties Of Barium Tellurite, Nuclear Engineering And Technology 53 (2021) 4106e4113.
Https://Doi.Org/10.1016/J.Net.2021.06.009

ABSTRACT: Theory of Vision is a transformation of Vision of Object from one reference point (system) to the other reference point (system). Theory of Vision can be applied to obtain Vision of Object which is used for the calculation of velocity of object. In this paper, Theory of Vision is demonstrated and interpreted by a schematic diagram. In addition, Theory of Vision is applied in the derivations of Equation of Relative Velocity and Equation of Light Speed..

 

Keywords: Reference Point, Reference System, Absolute Space System, Vision of Object, Principle of Vision, Theory of Vision, Vision of Light, Light Speed, Special Relativity, Absolute Light Speed, Inertia Light Speed, Equation of Relative Velocity, Equation of Light Speed.

[1]. Edward T. H. Wu. “Vision Of Object, Vision Of Light, Photon Inertia Transformation And Their Effects On Light Speed And Special Relativity.” IOSR Journal Of Applied Physics (IOSR-JAP), Vol. 9, No. 5, 2017, Pp. 49–54.
[2]. Edward T. H. Wu. “Equation Of Relative Velocity And Its Correlations To Equation Of Light Speed, Dynamic Graviton Flux And Equations Of Doppler Shifts.” IOSR Journal Of Applied Physics (IOSR-JAP), 16(2), 2024, Pp. 21- 28.
[3]. Edward T. H. Wu. "Equation Of Light Speed." IOSR Journal Of Applied Physics (IOSR-JAP), 14(02), 2022, Pp. 47-59.
[4]. Edward T. H. Wu. “The Truth Of Light Speed.” IOSR Journal Of Applied Physics (IOSR-JAP), 17(1), 2025, Pp. 23- 50.
[5]. Edward T. H. Wu. “A Summary And Indirect Proves Of Wu’s Pairs And Yangton And Yington Theory.” IOSR Journal Of Applied Physics (IOSR-JAP), 15(3), 2023, Pp. 23-33.

ABSTRACT: The binary mixes Di Methyl Carbonate (DMC) + Methyl Acetate (MA), + Ethyl Acetate (EA), and + Butyl Acetate (BA) were measured for ultrasonic velocity (U), density (ρ), and viscosity (η) at four different temperatures (303.15-318.15K) covering the whole composition range. Deviations in adiabatic compressibility and viscosity, as well as excess......

 

Keywords: Di methyl carbonate, Densities, Speed of sound, Viscosity Compressibilities, Molar volumes, Inter Molecular Free Lengths..

[1]. A. Gayathri, T. Venugopal and K. Venkata Ramanan, IJ of Engineering & Technology, 2018,7 4.10, 602
[2]. Ganesan, Ravichandran, D. Gopinath, D. Ragouramane,, I J of Pure & Applied Physics, 2017, 55(9),664
[3]. G. Ravichandran, D. Gopinath, S. Armugam, G. Lakshminarayanan, IOSR, Journal of Applied Physics, 2017, 9(3), 51
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ABSTRACT: The slow evaporation solution technique has been effectively employed to grow single crystals of oxalic acid, with dimensions reaching up to 15×8×6 mm³. A single crystal X-ray diffraction examination unveils the lattice parameters of the grown crystal. FTIR analyses the vibration modes of various molecular groups in the crystal. The presence......

 

Keywords: Organic Single Crystal; Nonlinear Optics; UV-visible; X-ray diffraction; PL.

[1]. Arumanayagam,T., Ananth S., And Murugakoothan, P. (2013). Studies On Growth, Spectral, Optical And Mechanical Properties Of New Organic NLO Crystal: Guanidinium L-Glutamate (Gugl). J. Crys. Growth., 97:741-745, DOI: 10.1016/J.Saa.2012.07.039
[2]. Balamurugan, N., And Ramasamy, P. (2006). Investigation Of The Growth Rate Formula And Bulk Laser Damage Threshold KDP Crystal Growth From Aqueous Solution By The Sankaranarayanan-Ramasamy (SR) Method. Crys. Growth Design., 6(7):1642-1644, DOI:10.1021/Cg050680n.
[3]. Dharmadhikari, A. K., Basudev, R., And Sukhdev, R. (2004). Higher-Order Optical Nonlinearities In 4′-Dimethylamino-N-Methyl-4-Stilbazolium Tosylate. Opt. Commun., 235: 195-200, Https://Doi.Org/10.1016/J.Optcom.2004.02.042.
[4]. Priyadharshini, R. S., And Saravanan, M. (2023). Synthesis, Crystal Growth, Crystal Structure, Optical, Thermal And NLO Studies Of Vanillin −3,5-Dinitrosalicylic Acid (VDNS)-A Novel Organic Material. Optics Laser Technol., 164, 109512,
Http://Doi.Org/10.1016/J.Optlastec.2023.109512.
[5]. Rajesh, P., And Ramasamy, P. (2009). Effect Of Oxalic Acid On The Optical, Thermal, Dielectric & Mechanical Behavior Of ADP Crystals. Physica B., 404:1611-1616, Http://Doi.Org/10.1016/J.Physb.2009.01.032.

ABSTRACT: A series of polycrystalline nano-ferrite having the chemical formula CuCrxFe2- xO4(x=0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) were synthesized by sol-gel auto combustion method. X-ray diffraction (XRD) analysis was used to investigate the structural parameters and also to check the phase purity of all prepared samples. The analysis of XRD patterns revealed the formation of......

 

Keywords: Nano-ferrite, particle size, scanning electron microscopy

[1]. A. Ono, T. Murumo And N. Kaihara: Japan Elec. Eng. 28, 5 (1991) [2]. T. Normura, And A. Nakano: Proc. Icf6. 1198 (1992) [3]. J. Smit And H.P.J. Wijn: Ferrites, (Phillips, Technical Laboratory), Holland (1959) [4]. J. Villain,Z: Phys. B. 33, 31(1979) [5]. C. P. Poole And H. A. Farach, Z: Phys. B. 47, 55 (1982) [6]. J. M. Deniels And A. Rossenweig: Can. J. Phys. 48, 381 (1971)

ABSTRACT: Résumé Le constat fait sur les difficultés éprouvées en physique par les étudiants qui commencent les études supérieures au Département de Math-Physique nous a amenés à jeter un coup d'oeil rétrospectif sur la façon dont ce cours est dispensé au niveau secondaire. Le séminaire organisé par le Pool d'inspection du secondaire d'Idiofa Centre et le Département de Physique-Technologie de l'ISP/Idiofa du 10 au 12 janvier 2024 a été pour nous une aubaine saisie pour.....

[1]. Astolfi J.P. Et Develay M. (1989) : La Didactique Des Sciences. Que Sais- Je. PUF. N°2448. Paris.
[2]. Baruk, S., (1922) Dictionnaire De Mathématique Elémentaire, Ed. Du Seuil, Eléments De BOURBAKI, N., Théorie Des Ensembles, Mathématiques, Hermann. 1970.
[3]. Bourtrian, E. & Cie, (1996) Savoir Et Savoir-Faire En Math. 3ème, H. Dessain Liège, Belgique.
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ABSTRACT: This study investigates the structural and magnetic properties of Eu-doped LaFeO₃ nanoferrites synthesized using the solution combustion method. X-ray diffraction (XRD) analysis confirms the formation of a stable perovskite structure, with a decrease in lattice parameters indicating the successful incorporation of Eu ions into the lattice. Field emission scanning electron microscopy (FESEM) reveals uniform grain distribution along with increased porosity at higher Eu doping levels. Energy-dispersive spectroscopy (EDS) verifies the elemental composition of both pure....

Keywords: Lanthanum, Europium, XRD, FESEM, HRTEM, SQUID magnetometer

[1]. Lakshmi, M. R. V., Bera, P., Hiremath, M., Dubey, V., Kundu, A. K., & Barshilia, H. C. (2022). Structural, Magnetic, And Dielectric Properties Of Solution Combustion Synthesized Lafeo₃ Perovskites. Physical Chemistry Chemical Physics, 24, 5462–5478. Https://Doi.Org/10.1039/D1CP05501A
[2]. Manchón-Gordón, A. F., Sánchez-Jiménez, P. E., Blázquez, J. S., Perejón, A., & Pérez-Maqueda, L. A. (2023). Structural, Vibrational, And Magnetic Characterization Of Orthoferrite Lafeo₃ Ceramic Prepared By Reaction Flash Sintering. Materials, 16(3), 1019. Https://Doi.Org/10.3390/Ma16031019
[3]. Ismael, M., & Wark, M. (2019). Perovskite-Type Lafeo₃: Photoelectrochemical Properties And Photocatalytic Degradation Of Organic Pollutants Under Visible Light. Catalysts, 9(4), 342. Https://Doi.Org/10.3390/Catal9040342
[4]. Anh, L. M., Hien, M. T. N., Xuan, D. T. L., & Khoa, N. T. T. (2025). Synthesis And Characterization Of Magnetic Properties Of Nanocrystalline Perovskite-Type La₁₋ₓEuₓFeo₃ (0 ≤ X ≤ 0.5). Hue University Journal Of Science.
[5]. Al-Mamari, R. T., Et Al. (2024). Core And Surface Structure And Magnetic Properties Of Mechano-Synthesized Lafeo₃ Nanoparticles And Their Eu³⁺-Doped And Eu³⁺/Cr³⁺ Co-Doped Variants. Scientific Reports, 14, Article Number Pending.