Carbon-oxygen equilibrium and homogeneous nucleation of carbon monoxide bubbles in levitated molten iron

Imperial Users onl

Towards the security of McEliece's cryptosystem based on Hermitian subfield subcodes

The purpose of this paper is to provide a comprehensive security analysis for the parameter selection process, which involves the computational cost of the information set decoding algorithm using the parameters of subfield subcodes of 1-point Hermitian codes. The purpose of this paper is to provide a comprehensive security analysis for the parameter selection process, which involves the computational cost of the information set decoding (ISD) algorithm using Hermitian subfield subcode parameters

Estimating the dimension of the subfield subcodes of hermitian codes

In this paper, we study the behavior of the true dimension of the subfield subcodes of Hermitian codes. Our motivation is to use these classes of linear codes to improve the parameters of the McEliece cryptosystem, such as key size and security level. The McEliece scheme is one of the promising alternative cryptographic schemes to the current public key schemes since in the last four decades, they resisted all known quantum computing attacks. By computing and analyzing a data collection of true dimensions of subfield subcodes, we concluded that they can be estimated by the extreme value distribution function

Outcome of Dome-Shaped Proximal Tibial Osteotomy in Infantile Genu Varum

Background: The goals of the proximal tibial osteotomy are correcting the deformity, Hip-knee-ankle angle, and preventing the progress of the destruction of the medial compartment of the knee joint.Objectives: The aim of the work was to evaluate the outcome of children with genu varum after proximal tibial dome shaped osteotomy.Patients and Methods: These randomized clinical trials study included a total of 10 patients with 12 affected knees confirmed with persistent physiologic genu varum, attending at Orthopedic Department, Zagazig University Hospitals, Zagazig, Egypt. All cases were evaluated pre and post-operatively according to Modified Hospital for Special Surgery Knee Scoring System (HSSKS) as shown in appendix I. cases were assessed for functional improvement after surgery at 2, 4 months and detection of malunion or delayed union after 3 months. Results: The mean (±SD) pre-operative tibio-femoral angle was 21.7 (±5.6) versus 3.18 (±1.97) post-operatively, preoperative femoral condyle-tibial shaft angle (FTA) was 16.3 (± 2.8) versus 3.2 (±1.1) post-operatively and preoperative metaphyseal diaphyseal angle was 15.8 (±2.6) versus 3.6 (±1.2) post-operatively with a statistically significant difference in between (p < 0.05). The mean pre-operative HSSKS scores were 70.16±11.3 while the mean post-operative HSSKS scores were 91.4±2.1.Conclusion: It could be concluded that proximal tibial osteotomy using dome-shaped procedure to correct Infantile Genu varum deformity, has favorable treatment outcomes, does not involve any dangerous complications, and can be used as a safe and effective treatment method for the correction of infantile genu varum deformity. In the current study, angles significantly improved, most of legs got full correction and little complications occurred

Electroneurophysiological evaluation in children and adolescents with collagen diseases

Background: Sensorimotor neuropathies have been reported in patients with known or suspected connective tissue disease. It is often difficult to diagnose early neuropathies, and the study of the peripheral neuromuscular system is often made difficult by symptoms resulting from pain in the joints and limitation of movement.Objective: We aimed to investigate the central and peripheral nervous systems involvement in patients with pediatric- onset SLE and juvenile rheumatoid arthritis through clinical assessment and neurophysiological studies (motor nerve conduction velocity (MNCV) of the tibial nerve bilaterally and somatosensory evoked potentials (SSEPs) of the median nerve bilaterally) and to study their relation to clinical data and laboratory investigations.Methods: Nineteen patients with SLE (mean age 14.47± 3.94 years)and fifteen JRA patients (mean age 13.39±3.9 years) were included in the study. Ten healthy, matched subjects served as the control group. In addition to clinical assessment, including complete neurological and psychiatric evaluation, different investigative tools needed for diagnosis as well as assessment of systemic involvement and the degree of activity, were implemented. Both patients and control groups were subjected to neurophysiological studies (Motor nerve conduction velocity (MNCV) of tibial nerve bilaterally and Somatosensory evoked potentials (SSEPs) of the median nerve bilaterally).Results: Definite manifestations of neuropsychiatric involvement attributable to SLE was diagnosed in 37% of SLE patients. Of the SLE patients, 10.5% had abnormal MNCV on the right side, while Erb-N13 interpeak latencies were prolonged in 10.5% and 31.5% of the median nerves studied on the right and left sides, respectively, and N13-N20 was prolonged in 21% and 31.5%, respectively. Neither hypertension nor renal involvement significantly affected the studied parameters; however, SLE patients with cutaneous vasculitis showed slower MNCV of tibial nerve and prolonged Erb-N13 intervals on both sides. Erb-N13 and N13-N20 (on the right side) were positively correlated to the disease activity index (SLE-DAI). Of the JRA patients, 6% had slowed nerve conduction of right tibial nerve, while the interpeak latencies of Erb-N13 were prolonged in 6.6% and 13.3% on the right and left sides, respectively and N13-N20 was prolonged in 6.6% and 20%, respectively. Erb- N13 (on the right side) was negatively correlated to the cumulative dose of steroids.Conclusion: Our study revealed that sensorimotor neuropathies are often more common than expected in patients with collagen disease. Early subclinical neuropathies may be difficult to diagnose where symptoms from joint pain may mask the diagnosis. Widespread vasculitis including  vasculitis of the vasa nervora may be the underlying pathology, which  stresses the value of steroids in treatment.Key words: Collagen disease- neuropathy- somatosensory evoked potentials