Volume 4, Issue 3, 2023 

1. A Review Investigation and Physical Properties of Valves of the Human Heart Using Echocardiography   


The coronary valve of the heart is the mitral valve which allows and regulates the passage of blood from the left atrium to the left ventricle and does not allow the opposite. Valve prolapse is a well-known disease condition in people, where the valve leaflets become slack with elongation and sometimes thickening. This causes the valve to recover when it is clogged (To the left atrium) at the contraction of the left ventricle for a distance of 2 mm or more for the level of the cyclic link fibro valve. Those with such a condition may not complain of anything that they go on with their lives normally; meaning that the valve prolapses does not affect their lives. There are a number of people with mitral valve prolapse who suffer from chest pain, fatigue, heart palpitations, or shortness of breath, especially when they exert a certain effort. This condition may develop when complications occur in the mitral valve For example (inflammation of the valve and the lining of the heart). Where the inefficiency of the mitral valve occurs, it may develop into a condition of heart failure. This research aims to focus on the method of diagnosing mitral valve prolapse, using the echocardiogram (echocardiogram: that is, using ultrasound to diagnose the condition) and its importance.  


Keywords:  Medical physics; Echocardiography; Mitral valve

2. Smart COVID-19 Monitoring System for Public Building 


     This paper aims to introduce a smart COVID-19 monitoring system based on Arduino microcontroller technology. The proposed COVID 19 monitoring system  will be appropriate  monitoring system that can be using  in any interning  door gates of important  places such as supermarkets, hospitals and so on, to discover any interning  patient with COVID 19 and then reduce the infect  by this  virus. It consists from several health sensors such as temperature (LM35) sensor to measure temperature, humidity (DHT11) sensor to measure humid of body, the heartbeat sensor to measure the heart beats Per Minute (BPM), the Blood Pressure (BP)  sensor to measure the pressure of blood, the oxygen Saturation Sensor to measure the level of oxygen in blood, the heard cough device to detect any coughing from incoming person, the ultrasonic sensor to determine the appropriate distance between any two individual persons, and finally  using camera to detect if  the incoming person is actually wearing mask or not. The measured data from these sensors are processed with Arduino microcontroller and finally send to computer display screen in control center room. When the sending data on computer display screen is in safety level (negative COVID 19) and also the person actually wearing mask and placing in safety distance, this will open incoming gate to allow the person to income. But when the sending data on computer display screen is not in safety level ( positive COVID 19) this will closed the incoming gate and then  prevent  the patient person from entering  and tell the health organization office  to implement the required procedures. Based on experiments works, the proposed COVID 19 monitoring system can be achieved a higher classification accuracy with minimum cost expenses make it available for any one.

Keywords: Covid 19; Smart Monitoring system;  Sensors;  Microcontroller.

3. Numerical Solution of linear System Using Cubic Trigonometric B-Spline Method  


In this paper, we study the linear System Strongly Coupled Reaction-Diffusion as a numerical solution using the cubic trigonometric B-spline method. The finite difference scheme is used to discretize the time derivative while a cubic trigonometric B-spline is used as an interpolation function in the space dimension. The performance of this method is shown by comparisons are mad  with  both     error norms for different time. Some tables are presented to illustrate our results.

Keywords:  Strongly coupled reaction-diffusion system, Cubic trigonometric B-spline method. 


4. An Evaluation of Mathematical Teaching to Tertiary Engineering and Information Technology Students at the University of Canberra: A Pilot Study 


This study aimed to investigate the relationship and impact of learning behaviours and teaching methods in mathematics. To achieve this goal, a pilot study was conducted to assess the reliability of the questionnaire used and to analyse the results based on the responses of the participants and experts. A quantitative research design was employed, and data was collected from 15 participants from the Engineering and IT (EIT) departments at the University of Canberra (UC). In addition, the questionnaire was given to five mathematics and education experts to improve clarity. Based on their feedback, the questionnaire was rephrased and modified into different factors of learning behaviour and teaching methods to enhance its reliability and data authenticity. The results were analysed using SPSS software, which showed a highly significant correlation between learning behaviour and teaching method. Regression analysis also revealed that teaching behaviour was a significant predictor of learning behaviour.

Keywords:  Teaching pedagogies; Learning methods; Teaching Mathematics; Engineering and IT students. 


5. Experimental Study on the Effect of Icewind Blades Number on the Performance of Combined VAWT Having Helical Airfoil


The main objective is to study the effect of the number of vertical Icewind blades with vertical Helical Darrius turbine. Different models are fabricated to the experimental tests. The first test was carried out to the model of helical Darrius (Three blades Helical) and the other models (tow Icewind one stage, tow Icewind tow stage, tow Icewind there stage, There Icewind one stage, There Icewind tow stage , and there Icewind there stage) before combined with (Three blades Helical). The second test was carried out to the models with combine with (Three blades Helical). The proposed models are fabricated using three dimensions printing machine (3D printing). Experimental test are implemented by using low speed wind tunnel that is available at University of Baghdad/College of Engineering/Mechanical Engineering Department/Fluid Mechanics Laboratory. The finding results from the experimental tests show that the increase the number of Icewind blades hybrid with the helical Darrius rotor airfoil increasing of turbine output power. The greatest effect was achieved when using three Icewind blades integrated with the helical Darrius airfoil=1.92 and the least effect when only two Icewind blades are used=0.38.

Keywords:  Combined Vertical axis wind turbines, Darrius rotor Icewind rotor, Experimental Study, Wind tunnel.