Today antenna designers are paying more focus on microstrip patch antennas, because of its numerous advantages in field of communication, such as high reliability, light weight, ease of fabrication etc. But despite of its bountiful advantages, patch antennas also experience some drawbacks viz low gain and narrow bandwidth. These drawbacks can be overcome by taking care of some parameters in the...

The field of biomedical engineering relies heavily on materials known as bioceramics due to their many advantages. That’s also because are often used in the tissue well implant applications. It is a direct consequence effective use bioceramics. Three-dimensional printing now production technology most for On other hand, there various approaches (3D Printers). manufacturing processes have certai...

Background: Learning Management System (LMS) is a web-based system designed to support teaching and learning at an institution. The capabilities of any LMS are required to be evaluated to detect the room for improvement. This study aimed at discovering the students' perceptions of the functions of the LMS at Iran University of Medical Sciences (IUMS). Methods: This qualitative study included 15...

In previous works, the authors showed advantages and drawbacks of the use of PCA and ICA by separately. In this paper, a comparison of results in the application of these methodologies is presented. Both of them exploit the advantage of using a piezoelectric active system in different phases. An initial baseline model for the undamaged structure is built applying each technique to the data coll...

Several approaches and systems have been proposed in generative Computer Aided Process Planning field (CAPP), with different advantages and drawbacks. Most of these works are based on expert systems, production rules or special-purpose planning systems. In expert systems and production rules systems much knowledge representation is required, and special-purpose planning systems, on the other ha...

Organic electronic devices offer various advantages, such as low cost and tunability. However, the organic semiconductors used in these have significant drawbacks, including instability air carrier...

This paper is to present and to compare the DTC applied to an induction motor (IM) fed by two-level and three level inverters voltage. Direct torque control (DTC) of induction motors fed by a two level inverters has drawbacks like more torque, flux and current ripples in steady state. All these drawbacks can be overcome by DTC of induction motor fed by a three level inverters. Three level inver...

Algorithms for solving agreement problems can be classified in two categories: (1) those relying on failure detectors that we call FD-based, and (2) those that rely on a Group Membership Service that we call GMS-based. The paper discusses the advantages and limitations of these two approaches, and proposes an extension to the GMS-approach that combines the advantages of both approaches, without...