Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : parameters

Barometric Trend in Contemporary Design A Study in Bricks Facades

A.M.H. Al-Moqaram; S. R.H. Majed

Engineering and Technology Journal, 2017, Volume 35, Issue Issue 1C, Pages 1-17
DOI: 10.30684/etj.35.1C.1

Recently appeared many trends in architecture design, one of theme is “Barometric Design”, especially
after the emergence of digital-oriented modeling programs within Construction, which needs high
accuracy, and Craft. Although this concept has been notice in previous ancients like pyramids and
ziggurats, the most of studies constrain on general aspects of Barometric design-on over all building and
the mechanisms and digital programs related to it - ,and little studies cares about the relationship of this
concept with specific material like brick. The aim of the research: clarify the role of barometric design in
dealing with bricks in contemporary building facades. The research problem was Lack of clarity of the
role of barometric design in contemporary buildings facades that use bricks as essential material. This was
based on assumption: barometric attitude helps to give the bricks high expression ability and quality in
contemporary facades. The brick assume as parameter part of parametric integration .Research
methodology is analytical descriptive consist of three steps, first: exploring research problem, second:
establishing theoretical framework, about parametric design concept within brick facades (its expressive
ability, goals, dimension, its function and mechanics), third: practical study (building measurement,
identify case study samples), drive findings and conclusions. The main conclusion was, the design with
barometric attitude using brick material in facades helps to display emotion and visual contribute, as well
as decrease cost and support environmental solutions (climate and sound).

Design and Simulation of 1.5GHz Amplifier Utilizing the BFR92A and Transmission Lines

Ahmed W. Al-Saffar

Engineering and Technology Journal, 2015, Volume 33, Issue A4, Pages 934-946
DOI: 10.30684/etj.33.4A.15

The key factor of providing good performance for any electronic device is by eliminating unwanted reflections those lead to waste energy and, therefore, affect circuit stability. This is done by finding an approach to match both of the circuit’s input and output to other in-between connected elements. Amplifiers fall within this category, in this paper, our target is to match the BFR92A transistor to 50ohms input and output loads to achieve 11dB gain at 1.5GHz with 100MHz of bandwidth that it can be used for RF low noise amplifiers.
In this research, different approaches were used to utilize and achieve our work requirements by, primarily, using Micro-Wave Office software (M.W.O) to calculate S-Parameters and simulate the amplifier performance. In the first design approach, intermediate line and quarter-wave plate have been used and the results are accurately discussed. Another way to design was by utilizing the stub lines to get preferring gain and bandwidth and, then, comparison has made between both approach’s results to examine which is better to use.