NUMERICAL SOLUTION OF PERTURBATION STURM-LIOUVILLE PROBLEMS USING CHEBYSHEV POLYNOMIAL

In this paper, a boundary value problem which consists of the integro-differential equation is considered, Chebyshev polynomial is used to find the numerical solution of perturbation Sturm-Liouville problems, an example of numerical results are given and algorithms are performed by Mathmatica (0.7) program

The behavior of reinforced lightweight concrete beams with initial cracks

This research examines the performance of reinforced lightweight concrete beams subjected to several degrees of damage (50%, 60%, 70%, and 100%). It can use a sheet made of Carbon Fiber Reinforced Polymer (CFRP) to reinforce. The Full U-wrapping rehabilitation method was tested in the presented experimental program. In this method, CFRP sheets are attached to the bottom only and the side and bottom of the beam section. Experiments proved that the service load (Ps) increases by 7.06 % from a damage level of 50 % to 70 %, rises by 1.21 % from a damage level of 60 % to 70 %, and falls by 3.07 % from a damage level of 100 %. The result also rose for the fortified sample by 11.99%. Increases of 42.67 %, 33.07 %, and 23.73 % in the stiffness ratio (k) were observed at damage intensities of 50, 60, and 70 %, respectively. Damage at lower severity levels is increasing at a faster rate. The ductility of the restored LWC beams is more excellent than the control, as with the stiffness. Damage levels of 50%, 60%, and 70% saw increased ductility of 35.60, 34.92, and 34.69 %, respectively

Bifurcation Analysis of a Model of Cancer

In this paper, we study the bifurcation of a cancer model with completely unknown parameters. The bifurcation analysis of the biologically feasible steady-states of this model will be discussed. It is proved that the system appears to exhibit many cases of bifurcation for some ranges of system parameters. Numerical analysis and extensive numerical examples of the bifurcation for some ranges were carried out for various system parameter values and different initial densities

Pericardial dual mesh uptake on PET scan mimicking residual mesothelioma; a case report

Introduction: Malignant pleural mesothelioma (MPM) is a rare and aggressive cancer that typically arises from the mesothelial linings of the lungs. The current study presents a rare case of MPM with a good clinical response to chemotherapy, associated with pericardial dual mesh uptake in PET scan upon follow up. Case presentation: A 33-year-old male presented with dyspnea, severe headache for a period of a month. He had history dendritic cell sarcoma which had been managed by 21 cycles of radiotherapy. Chest x. ray showed multiple pleural based masses. Chest computed tomography scan showed multiple lobulated pleural masses involving right hemithorax. Pleural biopsy showed epithelial type-mesothelioma. The patient underwent 3 sessions of combination chemotherapy followed by pleurectomy. The patient's response to chemotherapy was optimal and 5 month-PET scan follow up showed uptake by the implanted mesh. Discussion: MPM is reported to be directly linked to asbestos exposure with poor prognosis. The current optimal management regarding MPM is lacking. Even though PET scan is highly sensitive, sites of in�fections, inflammation, and healing of surgical scars have been reported to show uptake, leading to a false positive result. Conclusion: The best therapeutic approach regarding MPM can be multimodal therapies that include surgery, radiotherapy, and chemotherapy before and after surgery. PET scan follow up of patients with previous mesh implantations can show uptake and mimic malignanc

Combined operation for coronary artery bypass grafting and mitral valve replacement; risk and outcome

Introduction The combination of mitral valve replacement (MVR) with coronary artery bypass grafting (CABG) is generally thought to have a greater early and late mortality than either procedure alone. The aim of this study is to review single center experience for the concomitant MVR and CABG. Patients and methods This is a single center, retrospective, single cohort study, composes of consecutive cases. It included all the cases of combined operation of MVR and CABG. The patients were followed up for a median duration of two years (six months to four years). The data were collected from hospital records and registers of hospital statistics. The followings were obtained; socio-demographic data, information regarding clinical courses, intraoperative findings, and post-operative follow up data. Result The study included 72 cases, the mean age was 56 years, 38 of them (53%) were males and 34 (47%) were female. The most common comorbidity was hypertension which was found in 24 patients (33%). The mean preoperative ejection fraction was 59%. Twenty-two patients (30.6%) had single graft, 21 patients (29.2%) underwent 3-vessel grafting, 16 patients (22.2%) had 2-vessel grafting, and 13 cases (18.1%) underwent 4-vessel grafting. The CPB duration ranged from 108 to 280 min with a mean of 182 min and cross-clamp time ranged from 80 to 186 min with a mean of 122 min. The most common complication was plural effusion which occurred in 8 cases (11.1%) and managed by aspiration. Overall mortality was 8.3% (4 patients). Conclusion CABG and chordal-sparing and posterior leaflet replacement has favorable outcome, as well as minimizes the need of redo surgery as in repair.one of the best options for CAD and sever MR

SURVEY: AUDIO READING SYSTEM FOR BLIND PERSONS

Audio Reading System is used to help blind people to read the text based on camera as input device and speaker as output device. The system used the OCR algorithm to extract the text from input image and Text-to-Speech algorithm to convert text into corresponding voice. In this paper, we review newest research of audio reading system. We discuss the hardware and software, which is used, on system for different types approach. Finally, the result of this paper that is: Raspberry pi, python and tesseract are best tools used in Audio reading system. Also the braille and finger print devices are not efficient and not easy to use

The Relationship between the Academic Procrastination and Self-Efficacy among Sample of King Saud University Students

The purpose of this study is to explore the relationship between the academic procrastination and self-efficacy among students of King Saud University. It also aims to identify whether the level of Academic procrastination varies depending on variables such as type of the college, academic level, or the level of students’ achievement. Two instruments were developed: academic procrastination instrument, and self-efficacy instrument. The questionnaires were distributed to random sample of 195 students from Science and Arts colleges at King Saud University. The Findings indicate that the highest percentage of the distribution of the sample on of procrastination Academic scale is (83.6%), followed by the low percentage (9.7%) of procrastination while the lowest percentage of procrastination is (6.7%). The findings also showed that there were statistically significant differences at the level of academic procrastination due to level of achievement for favour of group who get (acceptable) in their achievement. It also found that there were no statistically significant differences due to the type of college and the academic achievement. In addition, the findings revealed that there were statistically significant differences between of the academic procrastination scale and the self-efficacy scale. Keywords: Academic procrastination, self-efficacy, university student

Evaluation of the Water Quality of River Kaduna, Nigeria Using Water Quality Index

Water is a natural resource of fundamental importance and supports all life forms. The study evaluated the water quality of River Kaduna using the Canadian Council of Ministers of the Environment (CCME) Water Quality Index. The study covered both raining and dry seasons in 10 sampling points. Water parameters analysed were turbidity, Zn, Pb, Cd, Cr, Cu, Mn, Fe, dissolved oxygen, electrical conductivity, pH, TDS and Ni using standard laboratory techniques. The data obtained were used to develop Water Quality Index (WQI) across the 10 sampling points and results showed that the water quality at Barnawa, Kudenda, Tudun Wada, Makera and Angwan Muazu are poor as their index values ranged between 31.8 – 42 while Kawo, Angwan Dosa, Malali, Kigo and Angwan Rimi are marginal as their index ranged between 45 – 61.3. The study concluded that the variety and level of contaminants in River Kaduna was related to the anthropogenic activities in the various parts of Kaduna Metropolis from where run-off and contaminants were received, hence, the water quality of River Kaduna is deteriorating. There is therefore the need for proper environmental education and discouragement in the use of toxic chemicals for farming so that pollution can be controlled at the source.&nbsp

The behavior of reinforced lightweight concrete beams with initial cracks

This research examines the performance of reinforced lightweight concrete beams subjected to several degrees of damage (50%, 60%, 70%, and 100%). It can use a sheet made of Carbon Fiber Reinforced Polymer (CFRP) to reinforce. The Full U-wrapping rehabilitation method was tested in the presented experimental program. In this method, CFRP sheets are attached to the bottom only and the side and bottom of the beam section. Experiments proved that the service load (Ps) increases by 7.06 % from a damage level of 50 % to 70 %, rises by 1.21 % from a damage level of 60 % to 70 %, and falls by 3.07 % from a damage level of 100 %. The result also rose for the fortified sample by 11.99%. Increases of 42.67 %, 33.07 %, and 23.73 % in the stiffness ratio (k) were observed at damage intensities of 50, 60, and 70 %, respectively. Damage at lower severity levels is increasing at a faster rate. The ductility of the restored LWC beams is more excellent than the control, as with the stiffness. Damage levels of 50%, 60%, and 70% saw increased ductility of 35.60, 34.92, and 34.69 %, respectively

Recycled Concrete Aggregated for the use in Roller Compacted Concrete: A Literature Review

The using of recycled aggregates from construction and demolition waste (CDW) can preserve natural aggregate resources, reduce the demand for landfill, and contribute to a sustainable built environment. Concrete demolition waste has been proven to be an excellent source of aggregates for new concrete production. At a technical, economic, and environmental level, roller compacted concrete (RCC) applications benefit various civil construction projects. Roller Compacted Concrete (RCC) is a homogenous mixture that is best described as a zero-slump concrete placed with compacting equipment, uses in storage areas, dams, and most often as a basis for rigid pavements. The mix must be sufficiently dry to support the weight of vibratory machinery while still being sufficiently moist to enough paste binder dispersion throughout the mass for efficient compaction. Limited studies into the use of RCC with fine recycled aggregate not from pavements are figured. This study aims to see how well-recycled concrete aggregates (RCA) perform in RCC mixtures. Also how well waste concrete could be used as a fine and coarse aggregate substitute in roller-compacted concrete pavement mixes, to create a good concrete mix in both wet and firm phases. The test results of mechanical properties showed 10% RCA is similar to those in the reference mix in the compressive strength, a 100% RCA ratio reduces compressive strength by almost 30%. Comparing Reference mix and Recycled concrete by 30% replacement, the compressive strength drops by just 6% when the RCA ratio is 30%