Blockage Prediction for Mobile UE in RIS-assisted Wireless Networks: A Deep Learning Approach

Due to significant blockage conditions in wireless networks, transmitted signals may considerably degrade before reaching the receiver. The reliability of the transmitted signals, therefore, may be critically problematic due to blockages between the communicating nodes. Thanks to the ability of Reconfigurable Intelligent Surfaces (RISs) to reflect the incident signals with different reflection angles, this may counter the blockage effect by optimally reflecting the transmit signals to receiving nodes, hence, improving the wireless network's performance. With this motivation, this paper formulates a RIS-aided wireless communication problem from a base station (BS) to a mobile user equipment (UE). The BS is equipped with an RGB camera. We use the RGB camera at the BS and the RIS panel to improve the system's performance while considering signal propagating through multiple paths and the Doppler spread for the mobile UE. First, the RGB camera is used to detect the presence of the UE with no blockage. When unsuccessful, the RIS-assisted gain takes over and is then used to detect if the UE is either "present but blocked" or "absent". The problem is determined as a ternary classification problem with the goal of maximizing the probability of UE communication blockage detection. We find the optimal solution for the probability of predicting the blockage status for a given RGB image and RIS-assisted data rate using a deep neural learning model. We employ the residual network 18-layer neural network model to find this optimal probability of blockage prediction. Extensive simulation results reveal that our proposed RIS panel-assisted model enhances the accuracy of maximization of the blockage prediction probability problem by over 38\% compared to the baseline scheme

Comparison between laser hemorrhoidoplasty procedure and conventional open surgical hemorrhoidectomy

Background: Hemorrhoids are a very common anorectal condition defined as the symptomatic enlargement and distal displacement of the normal anal cushions.Objective: The present study aimed to compare between laser hemorrhoidoplasty and conventional open surgical hemorrhoidectomy in treatment of the hemorrhoidal diseases.Patients and methods: This study included 30 patients with symptomatizing hemorrhoidal diseases. They were divided into two groups: 15 patients underwent open method (MMH) and 15 patients underwent laser method (LHP). They were admitted to General Surgery Department, Faculty of Medicine, Zagazig University Hospitals with symptomatic hemorrhoidal diseases. Full history, clinical examination and pre- and post-operative assessment were performed.Results: The mean age was distributed as 36.03 ± 7.32 in the MMH group and 35.73 ± 8.39 years in the LHP group with no significant difference between both groups. The mean operative time was distributed as 29.53 ± 4.05 and 14.60 ± 3.13 minutes for MMH and LHP groups respectively. The mean hospital stay for MMH group was 36.25 ± 6.58 hours and 7.85 ± 2.11 hours for LHP, MMH group significantly associated with longer hospital stay. MMH group was significantly associated with more bleeding at 1st and 2nd week but no bleeding founded after 2nd week at both groups.Conclusion: laser hemorrhoidoplasty (LHP) technique for the management of hemorrhoids was, with shorter operative time, less postoperative pain, shorter hospital stay, and less postoperative complications than open surgical hemorrhoidectomy

SARS-CoV-2 vaccination modelling for safe surgery to save lives: data from an international prospective cohort study

Background Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling. Methods The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death in 1 year. NNVs were based on postoperative SARS-CoV-2 rates and mortality in an international cohort study (surgical patients), and community SARS-CoV-2 incidence and case fatality data (general population). NNV estimates were stratified by age (18–49, 50–69, 70 or more years) and type of surgery. Best- and worst-case scenarios were used to describe uncertainty. Results NNVs were more favourable in surgical patients than the general population. The most favourable NNVs were in patients aged 70 years or more needing cancer surgery (351; best case 196, worst case 816) or non-cancer surgery (733; best case 407, worst case 1664). Both exceeded the NNV in the general population (1840; best case 1196, worst case 3066). NNVs for surgical patients remained favourable at a range of SARS-CoV-2 incidence rates in sensitivity analysis modelling. Globally, prioritizing preoperative vaccination of patients needing elective surgery ahead of the general population could prevent an additional 58 687 (best case 115 007, worst case 20 177) COVID-19-related deaths in 1 year. Conclusion As global roll out of SARS-CoV-2 vaccination proceeds, patients needing elective surgery should be prioritized ahead of the general population

Social communication network and its effects on intellectual security for university students in the Kingdom of Bahrain

Social communication network and its effects on intellectual security for university students in the Kingdom of BahrainAbstractThe purpose of the study is to identify the effects of social communication network on the intellectual security for university students in Bahrain. The study utilized the descriptive method administering a questionnaire to a sample of 104 male and female students in the Khalijia University in the Kingdom of Bahrain. The study results showed that the effect of social communication network on the  intellectual security for university students was average, a thing that requires raising the students' awareness of the uses of the social communication network and developing their ability of critical thinking in order to be able to differentiate views and thoughts they receive and avoid the destructive views that harm the stability and security of the society. The study concludes with offering a suggested framework to utilize the social communication network in activation the intellectual security for university students in the Kingdom of Bahrain.Keywords: Social communication network- intellectual security- University educatio

Study of Long Non-Coding RNA Tug1 Expression in Egyptian Colorectal Adenocarcinoma Patients

Purpose Colorectal cancer (CRC) is one of the most fatal tumors worldwide. In Egypt, most CRC cases occur in individuals > 40 years old. TUG1 has been proved to be disrupted in different malignancies and may have a critical role in tumor progression, invasion, and metastasis. However, its role in CRC has not been adequately studied

Magnetic Localization for an Electromagnetic-Based Haptic Interface

In this letter, we develop a magnetic localization system for an electromagnetic-based haptic interface (EHI). Haptic interaction is achieved using a controlled magnetic force applied via an EHI on a magnetic dipole attached to a wearable finger splint. The position of the magnetic dipole is estimated using two identical arrays of three-dimensional magnetic field sensors in order to eliminate the magnetic field generated by the EHI. The measurements of these arrays are used to estimate the position of the magnetic dipole by an artificial neural network. This network maps the field readings to the position of the magnetic dipole. The proposed system is experimentally validated under four cases of the magnetic field generated by the EHI. These cases are likely to be encountered during the haptic rendering of virtual shapes. In the absence of the magnetic field, the mean absolute position error (MAE) is 0.80 +/- 0.30 mm (n = 125). Static and sinusoidal magnetic fields are applied, and the MAEs are 1.26 +/- 0.43 mm (n = 125) and 0.91 +/- 0.33 mm (n = 125), respectively. A random time-varying magnetic field is applied, and the MAE is 0.86 +/- 0.33 mm (n = 125). Our statistical analysis shows that the repeatability of the magnetic localization is acceptable regardless of the field generated by the EHI, at alpha = 0.05 and 95% confidence level

Stratification of predictors of major amputation versus limb salvage in Egyptian patients with critical limb ischemia

Aim of the study:  To determine major predictors for limb salvage (or major amputation) in chronic limb threatening ischemia (CLTI) in Egyptian people. Design: Pilot study, observational analytical study. Patients and Methods: This study was conducted on 224 cases in the Department of Vascular Surgery in Kasr Al-Ainy Hospital – Cairo University between March 2018 to February 2019. The clinical, radiological and operative variables were collected and detect patients who need major amputation in 30 days and verify predictors of limb salvage, which was subjected to univariate analysis in order to determine the most important factors of failure of limb salvage. Results: The TLC, total CK, serum urea level and incomplete foot arch are independent factors directly proportional to the possibility of major amputation. Open interventions and presence of inline distal runoff enter the foot are independent factors inversely proportional to the possibility of major amputation. Anemia and active cardiac condition are risk factors for major amputation. Conclusion: We obtained factors that predict the limb salvage by using of univariate and multivariate analysis. These factors can help the practitioners to predict the limb salvage and guides the consumption of health care resources and personnel

Superficial femoral artery chronic total occlusion crossing strategies

Objectives: Superficial femoral artery (SFA) endovascular intervention procedures are one of the most common peripheral artery interventions (PAI) in the lower extremities around the world. Chronic total occlusions (CTO) are extremely common in this vascular bed, accounting for approximately 40–50% of all lesions treated. One of the most crucial decisions an operator must make for a good chronic total occlusion (CTO) recanalization is selecting the right catheter vascular access site. Methods: A prospective, cohort, study conducted on 30 patients to evaluate the safety and efficacy of different strategies for crossing the chronic total occlusion of superficial femoral artery. Results: There was statistically significant difference found between crossing techniques regarding DM and combined DM and dyslipidemia. Conclusion: Correlation of CTOP classification with larger sample size may show importance and improve crossing strategies