A Four Slot Dual Feed and Dual Band Reconfigurable Antenna for Fixed Satellite Service Applications

A dual feed and dual-band reconfigurable antenna is designed, analyzed, and prototyped in this work for fixed satellite service communication applications. The designed model occupies the compact dimension of 24X21X1.2 mm on FR4 substrate and provides an input impedance of 50 ohms at both ports. The proposed model offers additional circular polarization characteristics at both the resonating bands. The PIN diode-based switching conditions, and the frequency reconfigurability analysis in both simulation and measurement are almost match. The combination of dual-band resonance, frequency reconfigurable nature, and compact dimension makes this model an attractive candidate in the specified field with considerable gain (8.5 dB) and efficiency (80%)

A CRITICAL REVIEW ON SINDUVARA (VITEX NEGUNDO) WITH SPECIAL REFERENCE TO VISHA CHIKITSA

Sinduvara (Vitex negundo) is a deciduous shrub naturalized in many parts of the world including India. It is used in all systems of treatment – Ayurveda, Unani, Siddha, Homeopathy and Allopathy. Referred to as Sindhuvara and Nirgundi in Ayurveda, it has been used as medicine since ancient times. It is taken in a variety of ways, both internally and externally. The whole plant, leaves, leaf oil, roots, fruits and seeds are administered in the treatment of specific diseases. However, in Ayurveda, the leaves, roots and bark are the most important parts. According to recent researches, the extracts of the plant shows the potential as an antidote for snake poisoning. The plant also exhibits CNS depressant, anti-convulsant, enzyme inhibiting, anti-cancer and anti-bacterial activities. As per Ayurved classics, it is included in the Vishaghna gana (Anti poisonous drugs) and is an important constituent of several Agadas (Anti-poisonous formulations). Agada, one of the modality used for treatment of poisoning is a combination of different herbs. During the study, it was found that Sinduvara is included in nearly 10 Agadas which are mostly used in case of Jangam visha (poisonous bites). So this review paper is an attempt of the author to explore the medicinal value of Sinduvara and highlight the Vishaghna property based on its pharmacological activity.

Assessment of Various Factors for Feasibility of Fixed Cantilever Bridge: A Review Study

Cantilever fixed partial dentures are defined as having one or more abutments at one end of the prosthesis while the other end is unsupported. Much controversy without documentary evidence has surrounded this prosthesis. Despite negative arguments, the cantilever prosthesis has been used extensively by the clinicians. If used nonjudiciously without following proper guidelines these might lead to some complications. Although complications may be an indication that clinical failure has occurred, this is not typically the case. It is also possible that complications may reflect substandard care. Apart from the substandard care, the unique arrangement of the abutments and pontic also accounts for the prime disadvantage: the creation of a class I lever system. When the cantilevered pontic is placed under occlusal function, forces are placed on the abutments. There are various criteria and factors necessary for a successful cantilever fixed partial denture (FPD). The purpose of this paper is to discuss briefly various factors involved in the planning of a cantilever fixed partial denture

Analysis Of Linear And Planarantenna Arrays

This paper describes the theories and techniques for designing linear and planar Antenna arrays and compares their radiation pattern with conventional arrays. The results of this work are among others, a software that includes the design of linear and planar arrays. Linear arrays cover uniform and non-uniform cases for broadside, endfire, scanning, and Hansen-woodyard radiation patterns. In linear arrays the amplitude and separation can be chosen for any distribution and triangular. Planar uniform arrays have been incorporated in the software for rectangular and circulargeometries and today we are developing non-uniform arrays for the

The PE-PPE Domain in Mycobacterium Reveals a Serine α/β Hydrolase Fold and Function: An In-Silico Analysis

The PE and PPE proteins first reported in the genome sequence of Mycobacterium tuberculosis strain H37Rv are now identified in all mycobacterial species. The PE-PPE domain (Pfam ID: PF08237) is a 225 amino acid residue conserved region located towards the C-terminus of some PE and PPE proteins and hypothetical proteins. Our in-silico sequence analysis revealed that this domain is present in all Mycobacteria, some Rhodococcus and Nocardia farcinica genomes. This domain comprises a pentapeptide sequence motif GxSxG/S at the N-terminus and conserved amino acid residues Ser, Asp and His that constitute a catalytic triad characteristic of lipase, esterase and cutinase activity. The fold prediction and comparative modeling of the 3-D structure of the PE-PPE domain revealed a “serine α/β hydrolase” structure with a central β-sheet flanked by α-helices on either side. The structure comprises a lid insertion with a closed structure conformation and has a solvent inaccessible active site. The oxyanion hole that stabilizes the negative charge on the tetrahedral intermediate has been identified. Our findings add to the growing list of serine hydrolases in mycobacterium, which are essential for the maintenance of their impermeable cell wall and virulence. These results provide the directions for the design of experiments to establish the function of PE and PPE proteins

Correction to: Cluster identification, selection, and description in Cluster randomized crossover trials: the PREP-IT trials

An amendment to this paper has been published and can be accessed via the original article