This paper describes the design of a novel Ku-band slotted waveguide antenna (SWA), taking into consideration advantages and drawbacks using 3D direct metal laser sintering (DMLS) process. Indeed, DMLS process makes it possible to produce SWA with 64 radiating slots its feeding network in single monolithic However, considering lack accuracy process, whole must be completely thought out planned ...

Liposomes, particles composed of a thin bilayer shell surrounding an aqueous core, have recently gained attention as a potential biomedical tool for diagnostic or therapeutic use. Hybridizing liposomes with bound or encapsulated nanoparticles could extend their range of functionality, leading to applications including hyperthermia treatments. Though drug delivery remains one of the most promisi...

PURPOSE The aim of the study was to evaluate the effect of annealing on the nanostructure and hardness of Co-Cr metal ceramic samples that were fabricated with a direct metal laser sintering (DMLS) technique. MATERIALS AND METHODS Five groups of Co-Cr dental alloy samples were manufactured in a rectangular form measuring 4 × 2 × 2 mm. Samples fabricated by a conventional casting technique (Gr...

We study Harper operators and the closely related discrete magnetic Laplacians (DML) on a graph with a free action of a discrete group, as defined by Sunada [Sun]. A main result in this paper is that the spectral density function of DMLs associated to rational weight functions on graphs with a free action of an amenable discrete group, can be approximated by the average spectral density functio...

We study Harper operators and the closely related discrete magnetic Laplacians (DML) on a graph with a free action of a discrete group, as defined by Sunada [Sun]. A main result in this paper is that the spectral density function of DMLs associated to rational weight functions on graphs with a free action of an amenable discrete group, can be approximated by the average spectral density functio...

STATEMENT OF PROBLEM In recent years, direct metal laser sintered (DMLS) metal-ceramic-based fixed partial denture prostheses have been used as an alternative to conventional metal-ceramic fixed partial denture prostheses. However, clinical studies for evaluating their long-term clinical survivability and acceptability are limited. AIMS AND OBJECTIVE The aim of this study was to assess the ef...

This paper presents a hybrid manufacturing process for the preparation of complex cavity structure parts with high surface quality. Firstly, laser precision packaging technology is utilized to accurately connect thin plate substrate microchannel. Secondly, Direct Metal Laser-Sintering (DMLS) completely shape part. The morphology and microstructure encapsulated specimens DMLS molded were investi...

Actualmente, la fabricación de componentes volumétricos a partir vidrios metálicos y/o aleaciones fuera del equilibrio es un reto debido las condiciones enfriamiento requeridas para obtener estado amorfo completo conjunto fases en particular. Algunas tecnologías aditiva, como sinterización directa metal por láser (DMLS), pueden ofrecer una alternativa vidrio metálico polvos materia prima 100 % ...

optimization of process parameter is one of the ideal goals in laser sintering. the results of this process were measured as output parameters like: density, micro hardening, macro hardening, tension, roughness, stiffness, balling. in this paper, the influence of input parameter such as laser power, scan speed, material powder and etc are surveyed on output parameter like balling affection and ...