79 research outputs found
Robot Localization Based on Visual Landmarks
No full textEbied H, Witkowski U, Rückert U. Robot Localization Based on Visual Landmarks. In: The 5th IEEE International Conference on Informatics in Control, Automation and Robotics (ICINCO), 11-15 May-2008, Funchal, Madeira – Portugal. 2008
Robot Localization System Based on 2D-Color Vision Sensor
No full textEbied H, Witkowski U, Rückert U. Robot Localization System Based on 2D-Color Vision Sensor. In: The 4th International Symposium on Autonomous Minirobots for Research and Edutainment (AMiRE), 2-5 October 2007, Buenos Aires, Argentina. 2007
Visual Landmarks Based on Self-localization of Mobile Robot Using an Alternative Geometric Triangulation Algorithm
No full textEbied H, Witkowski U, Rückert U. Visual Landmarks Based on Self-localization of Mobile Robot Using an Alternative Geometric Triangulation Algorithm. In: The 5th International Conference on Computational Intelligence, Robotics and Autonomous Systems (CIRAS),19-21 June-2008, Linz, Austria. 2008
Joseph II, Patriarch of the Chaldeans (1696-1713/4), and the Book of the Magnet. First Soundings
No full textItem does not contain fulltext22 p
Study on hot deformation behavior of beta Ti-17Mo alloy for biomedical applications
No full textAbstractA novel biomaterial Ti-17Mo (mass%) was designed for orthopedic implant applications. Hot working behavior and deformation characteristics were studied in the β-single structure by hot compression tests in the strain rate range 0.01–10 s−1 and temperature range 1123–1273 K using a Thermec Master-Z simulator. The microstructural evolutions of the deformed alloy were studied by a scanning electron microscope equipped with an electron backscattered diffraction detector. The microstructures of the hot deformed alloy showed that dynamic recovery was more active than dynamic recrystallization (DRX). However, partial discontinuous DRX by grain boundary bulging is activated at high temperatures and low strain rates, e.g., 1273 K and 0.01 s−1. Due to the high stacking fault energy of the β phase with a bcc structure, the Ti-17Mo alloy possessed comparatively low activation energy of hot deformation (283 kJ/mol) compared with the conventional Ti alloys bearing multiple alloying elements.Abstract
A novel biomaterial Ti-17Mo (mass%) was designed for orthopedic implant applications. Hot working behavior and deformation characteristics were studied in the β-single structure by hot compression tests in the strain rate range 0.01–10 s−1 and temperature range 1123–1273 K using a Thermec Master-Z simulator. The microstructural evolutions of the deformed alloy were studied by a scanning electron microscope equipped with an electron backscattered diffraction detector. The microstructures of the hot deformed alloy showed that dynamic recovery was more active than dynamic recrystallization (DRX). However, partial discontinuous DRX by grain boundary bulging is activated at high temperatures and low strain rates, e.g., 1273 K and 0.01 s−1. Due to the high stacking fault energy of the β phase with a bcc structure, the Ti-17Mo alloy possessed comparatively low activation energy of hot deformation (283 kJ/mol) compared with the conventional Ti alloys bearing multiple alloying elements
Synthesis and Antimicrobial Evaluation of Some Tricyclic Substituted benzo[h]quinazolines, benzo[h]quinolines and naphthaleno[d]thiazoles
No full textA Mu'tazili Response to Christianity: Abu 'Ali al-Jubba'i's Attack on the Trinity and Incarnation
No full textJoseph II, Patriarch of the Chaldeans (1696-1713/4), and the Book of the Magnet. First Soundings
No full text
Structural and optical properties of spin coated ZnTTBPc thin films for optoelectronics via DFT and experiments
No full textAbstract The present research provides a comprehensive theoretical and experimental investigation into the structural and optical properties of zinc 2, 9, 16, 23-tetra-tert-butyl-29 H,31 H-phthalocyanine (ZnTTBPc). Density functional theory (DFT) calculations at the B3LYP/6-31G (d, p) level, were utilized to optimize the molecular structure, analyze Mulliken charges, generate a molecular electrostatic potential map, and compute frontier molecular orbital energies of ZnTTBPc molecule. The nonlinear optical properties, including polarizability and hyperpolarizability, were also determined, confirming the molecule’s applicability for nonlinear optical applications. Experimentally, spin-coated ZnTTBPc thin films were fabricated on quartz substrates. Structural characterization using X-ray diffraction and Raman spectroscopy indicated the amorphous nature of the thin films, whereas field emission scanning electron microscopy demonstrated a uniform, nanostructured morphology. Optical properties, including absorption coefficient, refractive index, and extinction coefficient, were analyzed over a wide spectral range (200–2000 nm), demonstrating the presence of direct optical transitions. The energy band gaps corresponding to the Q and B bands were obtained from Tauc plot analysis, with values of 1.42 and 2.25 eV respectively. The dispersion parameters and dielectric properties were evaluated using a single oscillator model. The nonlinear optical parameters such as the third-order nonlinear susceptibility, nonlinear refractive index and nonlinear absorption coefficient were calculated using semi-empirical relations. The results demonstrate that ZnTTBPc thin films possess excellent optical and nonlinear properties, making them highly promising candidates for advanced optoelectronic and photonic devices. This integrated theoretical and experimental approach underscores the importance of molecular design and fabrication techniques in optimizing materials for cutting-edge applications
- …
