Mohamed Khalel - Academia.edu (original) (raw)

Papers by Mohamed Khalel

Research paper thumbnail of Updatable Queue Protocol Based On TCP For Virtual Reality Environment

The variance in number and types of tasks required to be implemented within Distributed Virtual E... more The variance in number and types of tasks required to be implemented within Distributed Virtual Environments (DVE) highlights the needs for communication protocols can achieve consistency. In addition, these applications have to handle an increasing number of participants and deal with the difficult problem of scalability. Moreover, the real-time requirements of these applications make the scalability problem more difficult to solve. In this paper, we have implemented Updatable Queue Abstraction protocol (UQA) on TCP (TCP-UQA) and compared it with original TCP, UDP, and Updatable Queue Abstraction based on UDP (UDP-UQA) protocols. Results showed that TCP-UQA was the best in queue management.

Research paper thumbnail of Psychological factors that may influence outcome after joint replacement surgery

Current Orthopaedic Practice, 2010

ABSTRACT Current research on total joint arthroplasty has identified psychological distress as a ... more ABSTRACT Current research on total joint arthroplasty has identified psychological distress as a predictor of poor treatment out-comes. Most recent studies on total knee or hip arthroplasty that include psychological variables have found that preoperative indicators of ...

Research paper thumbnail of Influence of socioeconomic status on outcome of joint replacement surgery

Current Orthopaedic Practice, 2010

Total joint arthroplasty is one of the most successful and cost-effective treatments for end-stag... more Total joint arthroplasty is one of the most successful and cost-effective treatments for end-stage arthritis. Understanding the disparity of outcomes associated with total knee and hip arthroplasty is crucial in the treatment of arthritis. Disparity in health care occurs in a variety of ...

Research paper thumbnail of Effect of kyphoplasty on survival after vertebral compression fractures

The Spine Journal, 2008

BACKGROUND: A growing population of patients with osteoporosis and fragility fractures has develo... more BACKGROUND: A growing population of patients with osteoporosis and fragility fractures has developed. Fragility fractures, including vertebral compression fractures, have been associated with increased mortality. Early operative interventions for patients sustaining hip fractures have been found to reduce mortality. PURPOSE: To determine if kyphoplasty improves survival after vertebral compression fractures. STUDY DESIGN: A retrospective chart review of all kyphoplasty procedures performed by the same orthopedic surgeon between June 2000 and June 2004 and a review of patients receiving nonoperative care consisting of oral analgesia and an orthosis during the same time period were conducted. PATIENT SAMPLE: Patients seen by a single surgeon for an osteoporotic vertebral body fracture. OUTCOME MEASURES: The primary outcome measured was patient death within the study time period. METHODS: Data from both groups were tabulated and analyzed for statistical differences by Student t test and chi-squared analysis. Kaplan-Meier curves comparing age, medical comorbidity, and surgical intervention were constructed. Log-rank test was used to analyze the survival curves. RESULTS: Of the 94 patients who elected for kyphoplasty, 38 patients were deceased at the close of the current study which ended in September 2006, whereas 26 of the 90 patients who elected for conservative therapy had died. Student t test revealed a significant age difference between patients treated with kyphoplasty and those who were treated nonoperatively (p5.0002). Chi-squared analysis revealed a significant difference between the two populations with respect to Charlson score (p5.050) but no statistical difference between the two populations with respect to ASA (p5.81) or gender (p5.1207). Kaplan-Meier curves were constructed to independently assess the influence of age, medical comorbidity, and kyphoplasty on survival. A significant relationship was detected by log-rank test for age (p5.0172), ASA (p5.0497), and Charlson score (p5.0015) but not treatment with kyphoplasty (p5.1037). An age-adjusted mortality rate was calculated and was found to be 35.3 per 1,000 patient-years for the conservative treatment population and 40.1 for the surgical population. A multivariate analysis comparing age, comorbidity, and surgical treatment with survival did not detect a statistical relationship. CONCLUSION: Kyphoplasty did not seem to effect the survival of patients with a vertebral compression fracture.

Research paper thumbnail of Predictive Science and Technology in Mechanics and Materials

Journal of Engineering Materials and Technology, 2009

Research paper thumbnail of Psychosocial Profiles of Indigent Patients with Severe Osteoarthritis Requiring Arthroplasty

The Journal of Arthroplasty, 2011

Research paper thumbnail of Vertebroplasty and Kyphoplasty

Anesthesiology Clinics, 2007

Vertebral compression fractures occur more frequently than hip and ankle fractures combined. Thes... more Vertebral compression fractures occur more frequently than hip and ankle fractures combined. These fragility fractures frequently result in both acute and chronic pain, but more importantly are a source of increased morbidity and possibly mortality. Percutaneous veretebral augmentation offers a minimally invasive approach for the treatment of vertebral compression fractures. The history, technique, and results of vertebroplasty and kyphoplasty are reviewed. Both methods allow for the introduction of bone cement into the fracture site with clinical results indicating substantial pain relief in approximately 90% of patients.

Research paper thumbnail of Patient’s satisfaction with orthodontic treatment at King Khalid University, College of Dentistry, Saudi Arabia

Bangladesh Journal of Medical Science, 2015

Introduction: Patient satisfaction is important for ensuring patient’s adherence in orthodontic t... more Introduction: Patient satisfaction is important for ensuring patient’s adherence in orthodontic treatment. As teaching institutions, dental college clinics must constantly strive to find a balance between satisfying the needs of the patients and ensuring proper training of the students. The objective of the present study was to assess dental patient’s satisfaction with orthodontic treatment and related services at King Khalid University, College of Dentistry (KKU COD), Saudi Arabia.Materials and methods: A 19 item closed end questionnaire was developed and pretested to assess patient’s satisfaction with orthodontic care. The questionnaire items were designed under three domains: 1) Reception and work environment, 2) doctor-patient relationship, and 3) treatment expectations and satisfaction. The study sample consisted of all patients consulting the orthodontic clinics during the time frame of the survey and those who were willing to participate.Results: A total of 72 patients comple...

Research paper thumbnail of Updatable Queue Protocol Based On TCP For Virtual Reality Environment

The variance in number and types of tasks required to be implemented within Distributed Virtual E... more The variance in number and types of tasks required to be implemented within Distributed Virtual Environments (DVE) highlights the needs for communication protocols can achieve consistency. In addition, these applications have to handle an increasing number of participants and deal with the difficult problem of scalability. Moreover, the real-time requirements of these applications make the scalability problem more difficult to solve. In this paper, we have implemented Updatable Queue Abstraction protocol (UQA) on TCP (TCP-UQA) and compared it with original TCP, UDP, and Updatable Queue Abstraction based on UDP (UDP-UQA) protocols. Results showed that TCP-UQA was the best in queue management.

Research paper thumbnail of Psychological factors that may influence outcome after joint replacement surgery

Current Orthopaedic Practice, 2010

ABSTRACT Current research on total joint arthroplasty has identified psychological distress as a ... more ABSTRACT Current research on total joint arthroplasty has identified psychological distress as a predictor of poor treatment out-comes. Most recent studies on total knee or hip arthroplasty that include psychological variables have found that preoperative indicators of ...

Research paper thumbnail of Influence of socioeconomic status on outcome of joint replacement surgery

Current Orthopaedic Practice, 2010

Total joint arthroplasty is one of the most successful and cost-effective treatments for end-stag... more Total joint arthroplasty is one of the most successful and cost-effective treatments for end-stage arthritis. Understanding the disparity of outcomes associated with total knee and hip arthroplasty is crucial in the treatment of arthritis. Disparity in health care occurs in a variety of ...

Research paper thumbnail of Effect of kyphoplasty on survival after vertebral compression fractures

The Spine Journal, 2008

BACKGROUND: A growing population of patients with osteoporosis and fragility fractures has develo... more BACKGROUND: A growing population of patients with osteoporosis and fragility fractures has developed. Fragility fractures, including vertebral compression fractures, have been associated with increased mortality. Early operative interventions for patients sustaining hip fractures have been found to reduce mortality. PURPOSE: To determine if kyphoplasty improves survival after vertebral compression fractures. STUDY DESIGN: A retrospective chart review of all kyphoplasty procedures performed by the same orthopedic surgeon between June 2000 and June 2004 and a review of patients receiving nonoperative care consisting of oral analgesia and an orthosis during the same time period were conducted. PATIENT SAMPLE: Patients seen by a single surgeon for an osteoporotic vertebral body fracture. OUTCOME MEASURES: The primary outcome measured was patient death within the study time period. METHODS: Data from both groups were tabulated and analyzed for statistical differences by Student t test and chi-squared analysis. Kaplan-Meier curves comparing age, medical comorbidity, and surgical intervention were constructed. Log-rank test was used to analyze the survival curves. RESULTS: Of the 94 patients who elected for kyphoplasty, 38 patients were deceased at the close of the current study which ended in September 2006, whereas 26 of the 90 patients who elected for conservative therapy had died. Student t test revealed a significant age difference between patients treated with kyphoplasty and those who were treated nonoperatively (p5.0002). Chi-squared analysis revealed a significant difference between the two populations with respect to Charlson score (p5.050) but no statistical difference between the two populations with respect to ASA (p5.81) or gender (p5.1207). Kaplan-Meier curves were constructed to independently assess the influence of age, medical comorbidity, and kyphoplasty on survival. A significant relationship was detected by log-rank test for age (p5.0172), ASA (p5.0497), and Charlson score (p5.0015) but not treatment with kyphoplasty (p5.1037). An age-adjusted mortality rate was calculated and was found to be 35.3 per 1,000 patient-years for the conservative treatment population and 40.1 for the surgical population. A multivariate analysis comparing age, comorbidity, and surgical treatment with survival did not detect a statistical relationship. CONCLUSION: Kyphoplasty did not seem to effect the survival of patients with a vertebral compression fracture.

Research paper thumbnail of Predictive Science and Technology in Mechanics and Materials

Journal of Engineering Materials and Technology, 2009

Research paper thumbnail of Psychosocial Profiles of Indigent Patients with Severe Osteoarthritis Requiring Arthroplasty

The Journal of Arthroplasty, 2011

Research paper thumbnail of Vertebroplasty and Kyphoplasty

Anesthesiology Clinics, 2007

Vertebral compression fractures occur more frequently than hip and ankle fractures combined. Thes... more Vertebral compression fractures occur more frequently than hip and ankle fractures combined. These fragility fractures frequently result in both acute and chronic pain, but more importantly are a source of increased morbidity and possibly mortality. Percutaneous veretebral augmentation offers a minimally invasive approach for the treatment of vertebral compression fractures. The history, technique, and results of vertebroplasty and kyphoplasty are reviewed. Both methods allow for the introduction of bone cement into the fracture site with clinical results indicating substantial pain relief in approximately 90% of patients.

Research paper thumbnail of Patient’s satisfaction with orthodontic treatment at King Khalid University, College of Dentistry, Saudi Arabia

Bangladesh Journal of Medical Science, 2015

Introduction: Patient satisfaction is important for ensuring patient’s adherence in orthodontic t... more Introduction: Patient satisfaction is important for ensuring patient’s adherence in orthodontic treatment. As teaching institutions, dental college clinics must constantly strive to find a balance between satisfying the needs of the patients and ensuring proper training of the students. The objective of the present study was to assess dental patient’s satisfaction with orthodontic treatment and related services at King Khalid University, College of Dentistry (KKU COD), Saudi Arabia.Materials and methods: A 19 item closed end questionnaire was developed and pretested to assess patient’s satisfaction with orthodontic care. The questionnaire items were designed under three domains: 1) Reception and work environment, 2) doctor-patient relationship, and 3) treatment expectations and satisfaction. The study sample consisted of all patients consulting the orthodontic clinics during the time frame of the survey and those who were willing to participate.Results: A total of 72 patients comple...