Al-Bahir Journal for Engineering and Pure Sciences

The increase of global demand for cheap and clean power from renewable energy
sources has increased the number of these sources, increasing their impact on
the performance and stability of electrical distribution systems when integrated to
the main line feeder. In this work, number of technical factors related to electrical
production quality have been examined in order to evaluate the impact of solar
energy source on electrical power grid. The tests were carried out by measuring
the losses of active and reactive power and the voltage changes in the electrical
grid due to connecting the solar source to the main grid. The results obtained can
be used as a database to estimate the impact of solar power supply on the stability
of the grid. The simulation model was conducted by using the MATLAB Simulink
and the results were compared with the standard (9-IEEE) bus grid

The process of generating clean electricity requires several factors,
including materials that produce energy and technology used in the production of
energy as well as the environment in which it is possible to produce clean energy.
This is what was found in the movement of visitors to the holy shrines in Karbala,
where the research found the possibility of generating sufficient electrical energy
to feed the external lights by (38) external lighting column only from the traffic
of visitors and for a period of (10) hours of the day, which helps the national
electricity network

In the present study the results, The calcium, phosphorous, sodium and potassium levels
in the blood of the treated groups were lower than the control group, but did not reach the
significantly (P < 0.05) except phosphorus, which was lower significant. There was a significant
decrease (p <0.05) for all electrolyte concentrations for the studied pregnancy.
For the alkaline phosphatase enzyme level, there was a significant decrease in its level
in the treated group (P < 0.05) compared with the control group. On the other hand, the level
of acid phosphatase enzyme was higher in the treated group (P < 0.05). There was a significant
increase (p <0.05) for both enzymes for the studied pregnancy.

The purpose of this work is to report a theoretical study for resonance tunneling
current density (J) of electrons tunneling through semiconductor super-lattice
system. The system that we have considered is (a-Si/Si1-xGex) hetero-junction
super-lattice within the energy range of E< the potential barrier height (V_0). From
such system, we determined the (J) dependency on number of barriers (N) and the
mole fraction (x). The results shown in this work not only shed new light on the
physics of resonant tunneling in electric barrier structure but are also helpful in
designing quantum devices based on multi-barrier tunneling structures.

Heavy metals are dangerous chemical contamination that escape to the air,
soil and water from different anthropogenic and/or natural activities in which
causes adverse effects on animals, humans and environment because it toxic
and accumulation. In the present study measured (TSP) that consider the most
important air pollution for three areas (industrial, residential and agriculture areas)
found high significant differences among areas (P≤0.01) but no any significant
differences among months. Heavy metals (lead, Zinc, Cadmium) measure in
Air and soil for three areas (industrial, residential and agriculture areas) found
significant differences (P≤0.05) for lead element in the soil of industrial area as
compared to agriculture areas, while high significant differences (P≤0.01) for lead
element in the air of industrial and residential area as compared to the agriculture
areas. The result found high significant differences (P≤0.01) of Zinc element in
the soil of industrial residential area as compared to agriculture areas, and high
significant differences (P≤0.01) in the Air of industrial as compared to agriculture
areas. On other hand found high significant differences (P≤0.01) in Cadmium
element in the soil of industrial as compared to agriculture areas, while high
significant differences (P≤0.01) in Cadmium element in the air of residential as
compared to agriculture areas

This paper aims to introduce a study on Markov chain that the Russian
scientist presented Markov and how to benefit from it in medical institutions,
studying the time series of a number of injuries with hepatitis type C as Markov chain
by taking samples from the (Ministry of Health/ Department of Communicable
Diseases), in order to build issue according to the Markov's chain and depending
on the number of cases that are represented. Hence, the possibility of defining the
transition matrix representing it with a tree diagram and study its characteristics in
terms of universe whether or not it is primitive, ergodic and reducible

Multiple of International and Regional organizations have been active
in emphasizing the conservation and employment of architectural heritage in
contemporary design, especially after the wide spread of modern architecture
principles and international style design. These organizations have led to the
interest in history and heritage since the mid of twentieth century. By encouraging
architects to conserve, revive, and rehabilitate the traditional sites and buildings
through number of symbioses and conferences. Besides encouraging the use of
architectural heritage (its features and concepts) in new architectural design to
show the identity of each place and society. The most famous organizations are
Arab Towns Organization (ATO), and Aga Khan Organization which has published
many books about this subject, besides establishing awards for unique projects
and distinguished designers.
The research problem can be specified as the need to show the evaluation
criteria of choosing awards’ winners that are given by the mentioned organizations.
And it aims to analyse the most significant winning projects in architectural design
to explain criteria development of through time since award establishment till
nowadays to determine the most appropriate methods of design, which provide
identity, belonging, and contemporary concepts in the same time as the best
methods for future architectural design.
The awards’ criteria are applied to contemporary local projects to demonstrate
their expression of identity and belonging concept. The research concludes that
some projects have the potential to create a special identity that is known locally
and globally, while other projects use local characteristics to achieve belonging