Abstract: Tilt beam characteristic by changing the length of finite-sized square dielectric substrate of one arm rectangular spiral antenna has been investigated. Rectangular spiral is printed on a finite sized dielectric substrate (εr=3.27) backed by a finite-sized conducting plane. Rectangular spiral radiates in Right Handed Circular Polarization (RHCP). Horizontal spiral arm length (HL) is v...

baradaran rafii ar, md; motevasseli t, md*; yazdizadeh f, md; ansari sh, md; karimian f, md; sadoughi mm, md; kiani h ocular tissue engineering research center, shahid beheshti university of medical sciences, tehran, iran * corresponding author: [email protected] purpose: to compare anterior segment indices measured by two scheimpflug camera; galilei and pentacam. methods: in this observa...

The axial force measurement plays important role in tool designing and identification of its restrictions. Also, it is vital in design of machine mechanism and optimization of welding process parameters. In this study, a friction stir welded butt join on AA7075-T651 aluminum alloy plate is investigated. With change of some parameters, factors including axial force, mechanical properties, microh...

This article describes a method of fabricating a custom total occlusal convergence angle sticker with photo editing software and label stickers. The custom total occlusal convergence angle sticker can help clinicians achieve an accurate degree of taper during axial wall reduction of tooth preparation.

Total internal reflection fluorescence (TIRF) microscopy has the exciting laser beam incident beyond critical angle from the glass side of a glass/aqueous interface formed by the coverslip and aqueous sample. The aqueous side evanescent field decays exponentially with distance from the interface with penetration depth depending on incidence angle. Through-the-objective TIRF has the exciting las...

BACKGROUND It is crucial to recognize and understand anatomical features of the distal femoral condyles especially for orthopedists that take care of the elderly patient with leg deformity. OBJECTIVE Evaluate the rotational alignment of the distal femur by using axial radiographic technique. MATERIAL AND METHOD Thirty-six normal volunteers (72 knees) were enrolled in the present study. Mean...

Patients and methods Forty-one females with the pre-operative AIS participated in this study whose ages were 17.0±4.7 years old. Their spinal curve pattern according to Lenke’s classification and curve severities by Cobb’s angle were recorded. All the patients were asked to perform level walking on a 10m walk-way with their comfortable walking speed. Total of 28 reflective markers were placed o...

The purpose of this investigation was to design a novel magnetic drive and bearing system for a new centrifugal rotary blood pump (CRBP). The drive system consists of two components: (i) permanent magnets within the impeller of the CRBP; and (ii) the driving electromagnets. Orientation of the magnets varies from axial through to 60 degrees included out-lean (conical configuration). Permanent ma...

The potential distribution in a homogeneous, cylindrical volume conductor surrounding an isolated paced dog heart was first measured and then calculated by using a mathematical model that stimulates an anisotropic excitation wavefront spreading through the heart muscle. The study was performed with a view to establish to what extent the anisotropy of cardiac generators affects the potential fie...

Presented is a study of the tripping strength of asymmetrical longitudinal plate stiffeners subjected to a combination of axial and lateral loads. The loaded edges were taken to be simply supported. The method of analysis is based on the principle of minimum total potential, and ten displacement functions were used to describe the deformations of the plate and stiffeners. First yielding was use...