ammar hadi - Academia.edu (original) (raw)

Papers by ammar hadi

Journal of Forensic Medicine, 2020

Background: Measles remains a major public health problem in many developing countries including ... more Background: Measles remains a major public health problem in many developing countries including Iraq, Objective: To describe the epidemiological and clinical profiles of measles among children admitted to Babylon Teaching Hospital for Maternity and Children . Methodology : A descriptive observational cross sectional epidemiologic study was conducted on children diagnosed and admitted to Babylon teaching hospital for Maternity and Children . using the (person, place, time epidemiological model ) during the period from 1st of January 2019 to the 1st of September 2019. The total number patients was 157. The independent variables studied include; age, gender, residence, time of admission, nutritional status, vaccination status, any co morbidities, clinical presentations and complications. Results : One hundred fifty seven clinically and serologically diagnosed measles cases who were admitted to Babylon Teaching Hospital for Maternity and Children . . The male to female ratio was 1.4: 1...

International Journal of Advanced Sport Sciences Research, 2015

Chest wall disorders are a group of thoracic deformities that result in inefficient coupling betw... more Chest wall disorders are a group of thoracic deformities that result in inefficient coupling between the respiratory muscles and the thoracic cage. The disorders are usually characterized by a restrictive defect and share the potential of long term hypercapnic respiratory failure, the most common chest wall abnormality leading to respiratory failure is Thoracoplasty, Scoliosis and/or kyphoscoliosis may also cause severe respiratory failure, symptoms of respiratory failure include: dyspnoea on exertion, peripheral oedema, orthopnoea, repeated chest infections, morning headaches, fatigue, poor sleep quality and loss of appetite. Dyspnea is the term generally applied to sensations experienced by individuals who complain of unpleasant or uncomfortable respiratory sensations such as chest wall diseases, Many definitions of dyspnea have been offered, including: “difficult, labored, uncomfortable breathing” an “awareness of respiratory distress”, “the sensation of feeling breathless or exp...

International Journal of Advanced Sport Sciences Research, 2015

This study was developed to investigate the influence of whole body exercise program in the level... more This study was developed to investigate the influence of whole body exercise program in the level of force expiratory volume at the first second and shortness of breath in patients with COPD. Design: A prospective, cross-sectional study. Setting: Morjan Hospital. Patients: Sixteen patients with COPD were estimated. Measurements and results: Force expiratory volume at the first second (FEV1) and shortness breath were measured, there is a difference not significant between the two tests pre and post in measuring FEV1, whereas the value of calculated T is (2.3). The level of shortness of breath (Borg Scale) shows that the difference is not significant between the two tests pre and post as the value of calculated T (1.91) which is smaller than the value of tabular T (2.57). A significant difference between pre and post tests in the ratio of FEV1 measured in terms of the value of the calculated T (2.91) which is greater than the value of tabular T, the level of shortness of breath shows ...

Journal of Forensic Medicine, 2021

The research problem lies in the injury of the collateral ligament of the knee joint and what cau... more The research problem lies in the injury of the collateral ligament of the knee joint and what causes this injuryof pain. This pain increases in cases of bending and extending the knee joint for any movement and byinforming researchers about the physical therapy units, they found that rehabilitation of the injury is usuallythrough traditional rehabilitative exercises, such as weights, for example, which are often unwanted by theinjured who prefer the faster and easier method of performance and by using modern devices, including thethermal frequency device and the shock waves because it generates the desire and the rehabilitation andpsychological effect on the injured, therefore, the researchers decided to go into this experiment by usingrehabilitative exercises in a scientifically studied manner accompanied by a thermal frequency device andvibrational waves to rehabilitate the collateral ligament injury for students by strengthening the musclessurrounding the joint, in addition, the ...

2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), 2017

This paper is concerned with the performance analysis of a dual-hop random access network in unde... more This paper is concerned with the performance analysis of a dual-hop random access network in underwater communication environment. Single gateway equipped with multiple antennas, and employing zero-forcing technique in a space division multiple access scenario, is connected a random number of independent sources which are hidden from their destination(s). The sources are located underwater, and the only mean to connect them with their destination(s) is through a gateway, which acts as amplify and forward relay. We developed accurate mathematical models for the multiple access interference which take into account, in addition to the statues of each source (active/idle), the effects of fading and additive noise at both the gateway and destination(s). A new unified mathematical method is developed, which leads to the derivation of new analytical expressions for the overall spectral-efficiency. The accuracy of the new mathematical results is confirmed by Monte Carlo simulation.

Journal of Advanced Social Research, 2014

This study informs the quantitative impact of students using computer in a 3rd year undergraduate... more This study informs the quantitative impact of students using computer in a 3rd year undergraduate Nursing College. From a group of 30 students completed the study. Using a pre-post random division research design, students were divided to an experimental group and control group depend on a 28-question multiple-choice exam. The experimental group then listened to movies by computer about diseases rehabilitation over eight weeks; while the control group were not provided with any movie on computer but depended on teacher explain. After eight weeks, both groups were re-examined using the same test. Data were analyzed using the impact size statistic and 90% confidence intervals. The control group improved their exam performance by 33%, whereas the experimental group improved by 55%. The alteration between the groups on the post-test was a mean impact size of 0.21 (92% CI: -0.17 to 0.56 [trivial to positively small]). There is nearly no chance that the real influence in the population is...

12 Declaration 14 Copyright 15 Acknowledgements 17 Preface 18 List of Abbreviations 19 List of Ma... more 12 Declaration 14 Copyright 15 Acknowledgements 17 Preface 18 List of Abbreviations 19 List of Mathematical Notations 21 List of Variables 22

2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), 2017

Massive multiple-input multiple-output (MIMO) systems are expected to achieve significant gains i... more Massive multiple-input multiple-output (MIMO) systems are expected to achieve significant gains in both energy and spectral efficiency compared to conventional MIMO systems. However, these promising gains are limited by the impact of pilot contamination in TDD multicell massive MIMO. In this paper we address how to counter the problem of pilot contamination and propose an algorithm for pilot sequences allocation. The proposed algorithm takes advantage of the multiplicity of pilot sequences over the number of users in each cell to reduce the effect of pilot contamination. Our results show that the algorithm can significantly improve the spectral efficiency compared to the conventional pilot allocation algorithm.

Transmission Control Protocol TCP is a congestion control transport protocol, utilizing by the ap... more Transmission Control Protocol TCP is a congestion control transport protocol, utilizing by the applications which asks ensuring delivery. By the most common characteristics for TCP, congestion control, acknowledgment resend packet loos, where are prohibit from network collapse and trying to increase the performance of network. These attempts standing against a multiple situations which mark its presence in the network such as weakness of data flow which is happened in some point of the network such as bottleneck, however, sometimes bottleneck determining the efficiency of the network, which includes throughput, delay, packet delivery ratio PDR, and packet loss ratio PLR. Despite the all attempts, including the bandwidth increasing, packet size manipulation, and increase the queue size, that done on physical links of the network, without any tangible improvement unless a bottleneck treatment. In this paper, we study the performance metrics of TCP protocol including throughput, PDR, a...

This experimental research depicts the role of coating hot surfaces by graphite and graphene on t... more This experimental research depicts the role of coating hot surfaces by graphite and graphene on the process of heat dissipation from these hot surfaces. Three aluminum specimens have been prepared for test, one of theme is coated by graphite, another one by graphene a while the third is left free of coating for comparison purpose. Each specimen is tested separately in a home-made wind tunnel. A plate electrical heater is adhered on the bottom of the specimen to simulate the generated energy by a heat sink. A heat sink composed of high thermal conductivity was applied between the heater plate and the base plate of heat sink to reduce the contact resistance to heat flow. The experiments are conducted with four turbulent Reynolds number. The results reveal that the sample coated by graphene exhibits the best thermal dissipation while the uncoated specimen shows the worst thermal performance.

This study was developed to investigate the effect of physical exercise program on breath muscles... more This study was developed to investigate the effect of physical exercise program on breath muscles in asthma patients. Twenty patients with asthma were participated in present study and they were divided into two groups (experiment and control), each group included 10 patients. However, we used an experimental study because it is suitable to the nature of the study and present study was achieved in the pulmonary rehabilitation center of a Morjan Hospital. Our measurements involved force expiratory volume at the first second (FEV1), maximum inspiratory pressure (PI,max), maximum expiratory pressure (PE,max), and shortness of breath. Results of the study showed to be a significant difference between pre and post-tests in favor of experiment group, this mean that physical exercise had an impact on the proportion of FEV1, PI,max, PE,max, and the level of shortness of breath in patients with asthma for the experimental group. Our conclusions showed the importance of physical exercise to i...

This study was developed to investigate the influence of lower torso muscle training on 6-min wal... more This study was developed to investigate the influence of lower torso muscle training on 6-min walk distance (6MWD) in patients with COPD. Design: An experimental study. Setting: Morjan Hospital. Patients: Thirty patients with moderate COPD were estimated. Measurements and results: Pulmonary function and baseline dyspnea index (BDI) were assessed, maximal inspiratory pressure (PI, max), and 6MWD were measured, and the one minute repeat was determined for each of two exercises (leg extension, and leg press) performed on gymnasium equipment. Quality of life was estimated using the St. George Respiratory Questionnaire (SGRQ). The researchers found statistically important positive effects for training program on 6MWD and body weight (r _ 0.32; p < 0.05), BDI (r _ 0.50;p < 0.01), FEV1 (r _ 0.33; p < 0.05), PI, max (r _ 0.53; p < 0.01). Conclusions: The results of this study showed the importance of the lower torso training in submaximal exercise tolerance and could open new pe...

Physical The three-dimensional numerical study of turbulent r circulating for air distribution in... more Physical The three-dimensional numerical study of turbulent r circulating for air distribution in space. The st udy solved the partial differential equations by using finite-volu me method. By using Ansys-FLUENT 6.3.26 to simulate th complex flow inside the physical model. Carried out the pro cess of verifying the accuracy of the results obtai ned from the program and compare them together. The results of numerical model were compared with experimental predications f previous researchers. These comparisons show a good agreemen t. Th refore, the simulation of non-isothermal turb ulent flow within the room, was made using three principle geometrica l arr ngement of the room with different locations of supply opening, which built by gambit(2.2.30) program. The predicte d flow were plotted and discussed for buoyant flow. The study demonstrates that the flow behavior depends on loca tion of the opening supply (up and down) and on the location of the obstruction. These parameters was mode...

This study was aimed to evaluate the cardiotoxicity of cisplatin in rats and to investigate the c... more This study was aimed to evaluate the cardiotoxicity of cisplatin in rats and to investigate the cardioprotective effect of amlodipine on cisplatin treated rats by using cardiac biomarkers troponin, CK-MB. Thirty five healthy male swiss albino rats were used in this study. The study design was divided into two patterns: Pilot study design: The animals were randomly divided into two groups, In the first treated group, all rats received cisplatin in a single dose, while in the second treated group, rats received cisplatin in four divided doses every 2 days. Active study design: The animals were randomly divided into 3 groups (7 rats/ group) and treated as follows:- a- Normal saline (N.S) treated group. b- Cisplatin treated group. c- Amlodipine treated group with cisplatin. Blood samples were collected and used to determine the biomarkers serum troponin, CK-MB. The result from pilot study shows that in cisplatin treated groups (single dose) serum troponin, CKMB are not significantly cha...

Although power line communication (PLC) systems are available everywhere, unfortunately these sys... more Although power line communication (PLC) systems are available everywhere, unfortunately these systems are not suitable for information transmission due to the effects of the impulsive noise. Therefore, many previous studies on channel codes have been carried out for the purpose of reducing the impulsive noise in such channels. This paper investigates some methods for the construction of polar codes under PLC systems in the presence of Middleton class-A noise. We discuss here the most feasible construction methods which already have been adopted with other channels. In addition, we present an illustrative example for the construction in these methods and also we discuss a comparison between the methods in terms of performance.

Intelligent Automation & Soft Computing

The need to ensure the quality of video streaming transmitted over wireless networks is growing e... more The need to ensure the quality of video streaming transmitted over wireless networks is growing every day. Video streaming is typically used for applications that are sensitive to poor quality of service (QoS) due to insufficient bandwidth, packet loss, or delay. These challenges hurt video streaming quality since they affect throughput and packet delivery of the transmitted video. To achieve better video streaming quality, throughput must be high, with minimal packet delay and loss ratios. A current study, however, found that the adoption of the adaptive multiple TCP connections (AM-TCP), as a transport layer protocol, improves the quality of video streaming by increasing throughput and lowering packet delay and loss on high QoS wireless networks. The main objective of this study is to develop a Quality of Service (QoS) method for enhancing video streaming quality over wireless networks. For that, this paper proposes a bandwidth aggregation adaptive multiple TCP-connection (BAM-TCP) scheme to enhance the video streaming quality. BAM-TCP combines AM-TCP with a bandwidth aggregation (BAG) method to aggregate bandwidth from numerous connections. Simulation experiments demonstrate that the BAM-TCP method enhances throughput while minimizing packet loss ratio and end-to-end delay.

Materials Today: Proceedings

International Journal of Critical Illness and Injury Science

Background: Acute kidney injury (AKI) is repeatedly observed in ventilated critically ill patient... more Background: Acute kidney injury (AKI) is repeatedly observed in ventilated critically ill patients with coronavirus disease-2019 (COVID-19) pneumonia. This study aimed to determine the incidence, risk factors, and consequences of AKI in the ventilated critically ill adult patients with COVID-19 pneumonia. Methods: This retrospective study included all the ventilated critically ill adult patients with COVID-19 pneumonia from March 1, 2020, to June 1, 2020. Data were collected from the electronic medical system. AKI was diagnosed using the Kidney Disease: Improving Global Outcomes 2012 Clinical Practice definition. Patients were followed 90 days from the intensive care unit (ICU) admission time or to the date when they were discharged from the hospital. Results: AKI occurred in 65.1% of patients, with 26.6% of these started on continuous renal replacement therapy (CRRT). Patients with AKI had higher comorbidity and illness severity scores (P < 0.001). Age and the vasopressor requirements were predictors of AKI (P= 0.016 and P = 0.041) and hypertension predicted AKI (P = 0.099) and its progression (P = 0.05). The renal recovery rate was 86.7% and was associated with the mean arterial pressure on ICU admission in the no-CRRT group (P = 0.014) and the hypoxic index in the CRRT group (P = 0.019). AKI was associated with higher mortality (P = 0.017) and significantly longer ICU length-of-stay (P = 0.001). Additionally, AKI patients were more often discharged to a long-term skilled nursing facility (P = 0.005). Conclusion: COVID-19-associated AKI was common and associated with poor outcome, with the specific mechanisms being the main driving factors.

Saudi Critical Care Journal

Tracheoinnominate fistula (TIF) is a rare but potentially life-threatening complication after tra... more Tracheoinnominate fistula (TIF) is a rare but potentially life-threatening complication after tracheostomy. TIF was mostly observed within 7–21 days after tracheostomy but can present even years after tracheostomy. The risk factors for TIF are high cuff pressure, mucosal trauma from malpositioned cannula tip, low tracheal incision, excessive neck movement (hyperextension), radiotherapy, prolonged intubation, and high-riding innominate artery (HRIA). HRIA is also a rare anatomical variation of the innominate artery (IA) whereas IA bifurcates above the sternoclavicular joint. We report a rare case of TIF in a patient with HRIA, who presented with airway bleeding 2 months after percutaneous tracheostomy (PT) and was successfully managed with aggressive resuscitation and midline sternotomy. Knowledge of anatomical variation of the aortic arch and its major branches is essential for the physician who is routinely performing or managing tracheostomy. All the health-care workers involved in the management of tracheostomy should bear this complication in mind while dealing with any airway bleed. We recommend the routine use of bedside neck ultrasonography before all PTs to locate any aberrant vessel within the vicinity of tracheostoma to prevent this complication.

Journal of Physics, 2020

In this research, we focus on the performance of heat sink, new configurations of the micro heat ... more In this research, we focus on the performance of heat sink, new configurations of the micro heat sink with comprises of pinned copper pieces of appropriate dimensions have been proposed. Dozens of different shapes micro heat sinks have been manufactured from brass using Laser technique. These heat sinks have been coupled individually with a simulated electronic circuit including a power transistor to freely dissipate the generated heat. Bulk temperatures of heat sink and the power transistor have been measured using a thermal camera. The results showed that, in general, the finned heat sink of either configuration augments heat transfer compared with smooth one. It is found that the maximum percentage reductions in temperature of the transistor are demonstrated with two uncommon configurations, namely the leaves-shaped fin (LSF) 9.352% and the drop-shaped fin (DSF) 9.353%. on the other hand, a staggered wavy fin (SWF) shows minimum percentage reduction in transistor temperature, 0.9...

Journal of Forensic Medicine, 2020

Background: Measles remains a major public health problem in many developing countries including ... more Background: Measles remains a major public health problem in many developing countries including Iraq, Objective: To describe the epidemiological and clinical profiles of measles among children admitted to Babylon Teaching Hospital for Maternity and Children . Methodology : A descriptive observational cross sectional epidemiologic study was conducted on children diagnosed and admitted to Babylon teaching hospital for Maternity and Children . using the (person, place, time epidemiological model ) during the period from 1st of January 2019 to the 1st of September 2019. The total number patients was 157. The independent variables studied include; age, gender, residence, time of admission, nutritional status, vaccination status, any co morbidities, clinical presentations and complications. Results : One hundred fifty seven clinically and serologically diagnosed measles cases who were admitted to Babylon Teaching Hospital for Maternity and Children . . The male to female ratio was 1.4: 1...

International Journal of Advanced Sport Sciences Research, 2015

Chest wall disorders are a group of thoracic deformities that result in inefficient coupling betw... more Chest wall disorders are a group of thoracic deformities that result in inefficient coupling between the respiratory muscles and the thoracic cage. The disorders are usually characterized by a restrictive defect and share the potential of long term hypercapnic respiratory failure, the most common chest wall abnormality leading to respiratory failure is Thoracoplasty, Scoliosis and/or kyphoscoliosis may also cause severe respiratory failure, symptoms of respiratory failure include: dyspnoea on exertion, peripheral oedema, orthopnoea, repeated chest infections, morning headaches, fatigue, poor sleep quality and loss of appetite. Dyspnea is the term generally applied to sensations experienced by individuals who complain of unpleasant or uncomfortable respiratory sensations such as chest wall diseases, Many definitions of dyspnea have been offered, including: “difficult, labored, uncomfortable breathing” an “awareness of respiratory distress”, “the sensation of feeling breathless or exp...

International Journal of Advanced Sport Sciences Research, 2015

This study was developed to investigate the influence of whole body exercise program in the level... more This study was developed to investigate the influence of whole body exercise program in the level of force expiratory volume at the first second and shortness of breath in patients with COPD. Design: A prospective, cross-sectional study. Setting: Morjan Hospital. Patients: Sixteen patients with COPD were estimated. Measurements and results: Force expiratory volume at the first second (FEV1) and shortness breath were measured, there is a difference not significant between the two tests pre and post in measuring FEV1, whereas the value of calculated T is (2.3). The level of shortness of breath (Borg Scale) shows that the difference is not significant between the two tests pre and post as the value of calculated T (1.91) which is smaller than the value of tabular T (2.57). A significant difference between pre and post tests in the ratio of FEV1 measured in terms of the value of the calculated T (2.91) which is greater than the value of tabular T, the level of shortness of breath shows ...

Journal of Forensic Medicine, 2021

The research problem lies in the injury of the collateral ligament of the knee joint and what cau... more The research problem lies in the injury of the collateral ligament of the knee joint and what causes this injuryof pain. This pain increases in cases of bending and extending the knee joint for any movement and byinforming researchers about the physical therapy units, they found that rehabilitation of the injury is usuallythrough traditional rehabilitative exercises, such as weights, for example, which are often unwanted by theinjured who prefer the faster and easier method of performance and by using modern devices, including thethermal frequency device and the shock waves because it generates the desire and the rehabilitation andpsychological effect on the injured, therefore, the researchers decided to go into this experiment by usingrehabilitative exercises in a scientifically studied manner accompanied by a thermal frequency device andvibrational waves to rehabilitate the collateral ligament injury for students by strengthening the musclessurrounding the joint, in addition, the ...

2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), 2017

This paper is concerned with the performance analysis of a dual-hop random access network in unde... more This paper is concerned with the performance analysis of a dual-hop random access network in underwater communication environment. Single gateway equipped with multiple antennas, and employing zero-forcing technique in a space division multiple access scenario, is connected a random number of independent sources which are hidden from their destination(s). The sources are located underwater, and the only mean to connect them with their destination(s) is through a gateway, which acts as amplify and forward relay. We developed accurate mathematical models for the multiple access interference which take into account, in addition to the statues of each source (active/idle), the effects of fading and additive noise at both the gateway and destination(s). A new unified mathematical method is developed, which leads to the derivation of new analytical expressions for the overall spectral-efficiency. The accuracy of the new mathematical results is confirmed by Monte Carlo simulation.

Journal of Advanced Social Research, 2014

This study informs the quantitative impact of students using computer in a 3rd year undergraduate... more This study informs the quantitative impact of students using computer in a 3rd year undergraduate Nursing College. From a group of 30 students completed the study. Using a pre-post random division research design, students were divided to an experimental group and control group depend on a 28-question multiple-choice exam. The experimental group then listened to movies by computer about diseases rehabilitation over eight weeks; while the control group were not provided with any movie on computer but depended on teacher explain. After eight weeks, both groups were re-examined using the same test. Data were analyzed using the impact size statistic and 90% confidence intervals. The control group improved their exam performance by 33%, whereas the experimental group improved by 55%. The alteration between the groups on the post-test was a mean impact size of 0.21 (92% CI: -0.17 to 0.56 [trivial to positively small]). There is nearly no chance that the real influence in the population is...

12 Declaration 14 Copyright 15 Acknowledgements 17 Preface 18 List of Abbreviations 19 List of Ma... more 12 Declaration 14 Copyright 15 Acknowledgements 17 Preface 18 List of Abbreviations 19 List of Mathematical Notations 21 List of Variables 22

2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), 2017

Massive multiple-input multiple-output (MIMO) systems are expected to achieve significant gains i... more Massive multiple-input multiple-output (MIMO) systems are expected to achieve significant gains in both energy and spectral efficiency compared to conventional MIMO systems. However, these promising gains are limited by the impact of pilot contamination in TDD multicell massive MIMO. In this paper we address how to counter the problem of pilot contamination and propose an algorithm for pilot sequences allocation. The proposed algorithm takes advantage of the multiplicity of pilot sequences over the number of users in each cell to reduce the effect of pilot contamination. Our results show that the algorithm can significantly improve the spectral efficiency compared to the conventional pilot allocation algorithm.

Transmission Control Protocol TCP is a congestion control transport protocol, utilizing by the ap... more Transmission Control Protocol TCP is a congestion control transport protocol, utilizing by the applications which asks ensuring delivery. By the most common characteristics for TCP, congestion control, acknowledgment resend packet loos, where are prohibit from network collapse and trying to increase the performance of network. These attempts standing against a multiple situations which mark its presence in the network such as weakness of data flow which is happened in some point of the network such as bottleneck, however, sometimes bottleneck determining the efficiency of the network, which includes throughput, delay, packet delivery ratio PDR, and packet loss ratio PLR. Despite the all attempts, including the bandwidth increasing, packet size manipulation, and increase the queue size, that done on physical links of the network, without any tangible improvement unless a bottleneck treatment. In this paper, we study the performance metrics of TCP protocol including throughput, PDR, a...

This experimental research depicts the role of coating hot surfaces by graphite and graphene on t... more This experimental research depicts the role of coating hot surfaces by graphite and graphene on the process of heat dissipation from these hot surfaces. Three aluminum specimens have been prepared for test, one of theme is coated by graphite, another one by graphene a while the third is left free of coating for comparison purpose. Each specimen is tested separately in a home-made wind tunnel. A plate electrical heater is adhered on the bottom of the specimen to simulate the generated energy by a heat sink. A heat sink composed of high thermal conductivity was applied between the heater plate and the base plate of heat sink to reduce the contact resistance to heat flow. The experiments are conducted with four turbulent Reynolds number. The results reveal that the sample coated by graphene exhibits the best thermal dissipation while the uncoated specimen shows the worst thermal performance.

This study was developed to investigate the effect of physical exercise program on breath muscles... more This study was developed to investigate the effect of physical exercise program on breath muscles in asthma patients. Twenty patients with asthma were participated in present study and they were divided into two groups (experiment and control), each group included 10 patients. However, we used an experimental study because it is suitable to the nature of the study and present study was achieved in the pulmonary rehabilitation center of a Morjan Hospital. Our measurements involved force expiratory volume at the first second (FEV1), maximum inspiratory pressure (PI,max), maximum expiratory pressure (PE,max), and shortness of breath. Results of the study showed to be a significant difference between pre and post-tests in favor of experiment group, this mean that physical exercise had an impact on the proportion of FEV1, PI,max, PE,max, and the level of shortness of breath in patients with asthma for the experimental group. Our conclusions showed the importance of physical exercise to i...

This study was developed to investigate the influence of lower torso muscle training on 6-min wal... more This study was developed to investigate the influence of lower torso muscle training on 6-min walk distance (6MWD) in patients with COPD. Design: An experimental study. Setting: Morjan Hospital. Patients: Thirty patients with moderate COPD were estimated. Measurements and results: Pulmonary function and baseline dyspnea index (BDI) were assessed, maximal inspiratory pressure (PI, max), and 6MWD were measured, and the one minute repeat was determined for each of two exercises (leg extension, and leg press) performed on gymnasium equipment. Quality of life was estimated using the St. George Respiratory Questionnaire (SGRQ). The researchers found statistically important positive effects for training program on 6MWD and body weight (r _ 0.32; p < 0.05), BDI (r _ 0.50;p < 0.01), FEV1 (r _ 0.33; p < 0.05), PI, max (r _ 0.53; p < 0.01). Conclusions: The results of this study showed the importance of the lower torso training in submaximal exercise tolerance and could open new pe...

Physical The three-dimensional numerical study of turbulent r circulating for air distribution in... more Physical The three-dimensional numerical study of turbulent r circulating for air distribution in space. The st udy solved the partial differential equations by using finite-volu me method. By using Ansys-FLUENT 6.3.26 to simulate th complex flow inside the physical model. Carried out the pro cess of verifying the accuracy of the results obtai ned from the program and compare them together. The results of numerical model were compared with experimental predications f previous researchers. These comparisons show a good agreemen t. Th refore, the simulation of non-isothermal turb ulent flow within the room, was made using three principle geometrica l arr ngement of the room with different locations of supply opening, which built by gambit(2.2.30) program. The predicte d flow were plotted and discussed for buoyant flow. The study demonstrates that the flow behavior depends on loca tion of the opening supply (up and down) and on the location of the obstruction. These parameters was mode...

This study was aimed to evaluate the cardiotoxicity of cisplatin in rats and to investigate the c... more This study was aimed to evaluate the cardiotoxicity of cisplatin in rats and to investigate the cardioprotective effect of amlodipine on cisplatin treated rats by using cardiac biomarkers troponin, CK-MB. Thirty five healthy male swiss albino rats were used in this study. The study design was divided into two patterns: Pilot study design: The animals were randomly divided into two groups, In the first treated group, all rats received cisplatin in a single dose, while in the second treated group, rats received cisplatin in four divided doses every 2 days. Active study design: The animals were randomly divided into 3 groups (7 rats/ group) and treated as follows:- a- Normal saline (N.S) treated group. b- Cisplatin treated group. c- Amlodipine treated group with cisplatin. Blood samples were collected and used to determine the biomarkers serum troponin, CK-MB. The result from pilot study shows that in cisplatin treated groups (single dose) serum troponin, CKMB are not significantly cha...

Although power line communication (PLC) systems are available everywhere, unfortunately these sys... more Although power line communication (PLC) systems are available everywhere, unfortunately these systems are not suitable for information transmission due to the effects of the impulsive noise. Therefore, many previous studies on channel codes have been carried out for the purpose of reducing the impulsive noise in such channels. This paper investigates some methods for the construction of polar codes under PLC systems in the presence of Middleton class-A noise. We discuss here the most feasible construction methods which already have been adopted with other channels. In addition, we present an illustrative example for the construction in these methods and also we discuss a comparison between the methods in terms of performance.

Intelligent Automation & Soft Computing

The need to ensure the quality of video streaming transmitted over wireless networks is growing e... more The need to ensure the quality of video streaming transmitted over wireless networks is growing every day. Video streaming is typically used for applications that are sensitive to poor quality of service (QoS) due to insufficient bandwidth, packet loss, or delay. These challenges hurt video streaming quality since they affect throughput and packet delivery of the transmitted video. To achieve better video streaming quality, throughput must be high, with minimal packet delay and loss ratios. A current study, however, found that the adoption of the adaptive multiple TCP connections (AM-TCP), as a transport layer protocol, improves the quality of video streaming by increasing throughput and lowering packet delay and loss on high QoS wireless networks. The main objective of this study is to develop a Quality of Service (QoS) method for enhancing video streaming quality over wireless networks. For that, this paper proposes a bandwidth aggregation adaptive multiple TCP-connection (BAM-TCP) scheme to enhance the video streaming quality. BAM-TCP combines AM-TCP with a bandwidth aggregation (BAG) method to aggregate bandwidth from numerous connections. Simulation experiments demonstrate that the BAM-TCP method enhances throughput while minimizing packet loss ratio and end-to-end delay.

Materials Today: Proceedings

International Journal of Critical Illness and Injury Science

Background: Acute kidney injury (AKI) is repeatedly observed in ventilated critically ill patient... more Background: Acute kidney injury (AKI) is repeatedly observed in ventilated critically ill patients with coronavirus disease-2019 (COVID-19) pneumonia. This study aimed to determine the incidence, risk factors, and consequences of AKI in the ventilated critically ill adult patients with COVID-19 pneumonia. Methods: This retrospective study included all the ventilated critically ill adult patients with COVID-19 pneumonia from March 1, 2020, to June 1, 2020. Data were collected from the electronic medical system. AKI was diagnosed using the Kidney Disease: Improving Global Outcomes 2012 Clinical Practice definition. Patients were followed 90 days from the intensive care unit (ICU) admission time or to the date when they were discharged from the hospital. Results: AKI occurred in 65.1% of patients, with 26.6% of these started on continuous renal replacement therapy (CRRT). Patients with AKI had higher comorbidity and illness severity scores (P < 0.001). Age and the vasopressor requirements were predictors of AKI (P= 0.016 and P = 0.041) and hypertension predicted AKI (P = 0.099) and its progression (P = 0.05). The renal recovery rate was 86.7% and was associated with the mean arterial pressure on ICU admission in the no-CRRT group (P = 0.014) and the hypoxic index in the CRRT group (P = 0.019). AKI was associated with higher mortality (P = 0.017) and significantly longer ICU length-of-stay (P = 0.001). Additionally, AKI patients were more often discharged to a long-term skilled nursing facility (P = 0.005). Conclusion: COVID-19-associated AKI was common and associated with poor outcome, with the specific mechanisms being the main driving factors.

Saudi Critical Care Journal

Tracheoinnominate fistula (TIF) is a rare but potentially life-threatening complication after tra... more Tracheoinnominate fistula (TIF) is a rare but potentially life-threatening complication after tracheostomy. TIF was mostly observed within 7–21 days after tracheostomy but can present even years after tracheostomy. The risk factors for TIF are high cuff pressure, mucosal trauma from malpositioned cannula tip, low tracheal incision, excessive neck movement (hyperextension), radiotherapy, prolonged intubation, and high-riding innominate artery (HRIA). HRIA is also a rare anatomical variation of the innominate artery (IA) whereas IA bifurcates above the sternoclavicular joint. We report a rare case of TIF in a patient with HRIA, who presented with airway bleeding 2 months after percutaneous tracheostomy (PT) and was successfully managed with aggressive resuscitation and midline sternotomy. Knowledge of anatomical variation of the aortic arch and its major branches is essential for the physician who is routinely performing or managing tracheostomy. All the health-care workers involved in the management of tracheostomy should bear this complication in mind while dealing with any airway bleed. We recommend the routine use of bedside neck ultrasonography before all PTs to locate any aberrant vessel within the vicinity of tracheostoma to prevent this complication.

Journal of Physics, 2020

In this research, we focus on the performance of heat sink, new configurations of the micro heat ... more In this research, we focus on the performance of heat sink, new configurations of the micro heat sink with comprises of pinned copper pieces of appropriate dimensions have been proposed. Dozens of different shapes micro heat sinks have been manufactured from brass using Laser technique. These heat sinks have been coupled individually with a simulated electronic circuit including a power transistor to freely dissipate the generated heat. Bulk temperatures of heat sink and the power transistor have been measured using a thermal camera. The results showed that, in general, the finned heat sink of either configuration augments heat transfer compared with smooth one. It is found that the maximum percentage reductions in temperature of the transistor are demonstrated with two uncommon configurations, namely the leaves-shaped fin (LSF) 9.352% and the drop-shaped fin (DSF) 9.353%. on the other hand, a staggered wavy fin (SWF) shows minimum percentage reduction in transistor temperature, 0.9...