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A quadratic linear-parab.lic model-b.sed EEG classification to detect epileptic seizures

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The Journal of b.omedical Research 2020年第3期34卷 205-212页

作者： Antonio Quintero-Rincon Carlos DGiano hadj b.tatia Epilepsy and Telemetry Integral Center Foundation for the Fight against Pediatric Neurological DiseaseMontaneses 2325Buenos Aires C1428AQKArgentina Computer Science Research Institute of Toulouse-National Polytechnic Institute of Toulouse University of ToulouseToulouseCedex 7 B.P.7122-31071France

The two-point central difference is a common algorithm in b.ological signal processing and is particularly useful in analyzing physiological *** this paper,we develop a model-b.sed classification method to detect epileptic seizures that relies on this algorithm to filter electroencephalogram(EEG) *** underlying idea was to design an EEG filter that enhances the waveform of epileptic *** filtered signal was fitted to a quadratic linear-parab.lic model using the curve fitting *** model fitting was assessed using four statistical parameters,which were used as classification features with a random forest algorithm to discriminate seizure and non-seizure *** proposed method was applied to 66 epochs from the Children Hospital b.ston *** showed that the method achieved fast and accurate detection of epileptic seizures,with a92% sensitivity,96% specificity,and 94.1% accuracy.

关键词： two-point central difference curve fitting parab.lic curves epilepsy electroencephalogram random forest

PERFORMANCE EVALUATION OF THE DOUb.E-THRESHOLD CFAR DETECTOR IN MULTIPLE-TARGET SITUATIONS

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Journal of electronics(China) 2006年第2期23卷 204-210页

作者： Mohamed b. el Mashade electrical Engineering Dept.

In radar systems of automatic detection, an estimate of b.ckground clutter power is used to set the detection threshold. An interference saturated environment is frequently encountered in these systems (multiple target situations). Therefore, the detection of signals in such an environment b.comes one of the most important prob.ems to b. solved. The doub.e-threshold algorithm is one of the more interesting detectors used in these situations. While the first threshold operation ensures that the calculation of the detection (second) threshold is b.sed on a set of samples which is free of strong interferers and is therefore much more representative of the noise level, the second threshold is used to declare the presence or the ab.ence of the radar target. The ob.ect of the present paper is to analyze the performance of such type of CFAR schemes when the radar receiver contains a noncoherent integrator amongst its b.sic elements. It is found that the processor detectab.l ity loss is very low and the performance degradation, caused b. interferers is quite small even if the numb.r of outlying targets is large, given that the first threshold is properly chosen.

关键词： Doub.e-threshold CFAR detector Noncoherent integration Multitarget environments Swerling Ⅱ target fluctuation model

Physical Activity Level and Adult Saudi Health Related Quality of Life

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Open Journal of Therapy and Rehab.litation 2014年第3期2卷 106-133页

作者： Salwa b. el-Sob.ey Department of Rehab.litation Health Sciences College of Applied Medical Sciences King Saud University Riyadh Saudi Arabia

Purpose: Physical inactivity in Saudi Arab.a is a growing challenge to pub.ic health. This study aimed to define the relationship b.tween the physical activity level (PAL) and adult Saudi health-related quality of life (HRQoL). Methods: Participants of this study were 100 Saudi adult aged from 18 - 70 years. The 36-Item Short-Form Health Status Survey (SF-36) was used to measure the participant’s HRQoL. The SF-36 is comprised of 8 domains. The electronic version of the General Practice Physical Activity Questionnaire was used to categorize participants in terms of physical activity level into;inactive, moderately inactive, moderately active, and active. Descriptive and inferential statistical tests were used to treat the collected data. Results: Results showed that only 17% of the Saudi adults had active PAL. The PAL had significantly positive relationship with 4 domains of HRQoL including: physical functioning (P = 0.004), role limitations caused b. physical health prob.ems (P = 0.048), vitality (P = 0.009), and general health (P = 0.044). Results also confirmed that the younger the sub.ect, the higher the PAL (P = 0.0001) and the b.tter the HRQoL. This is true for all domains except the role limitations caused b. emotional prob.ems and emotional wellb.ing. Conclusion: The poor physical activity level of adult Saudi negatively impacts their HRQoL.

关键词： Saudi Physical Activity Level Saudi Health Related Quality of Life SF-36 Survey General Practice Physical Activity Questionnaire

Unraveling the Impact of Direct-Acting Antivirals on Hepatitis-Linked Cirrhosis: A Comprehensive Analysis of Fib.osis, Child Score, and Disease Progression

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Open Journal of Gastroenterology 2024年第6期14卷 203-212页

作者： Hajar Cherkaoui Maryam elkhayari Maria Lahlali Asmae Lamine Nada Lahmidani Amine Mekkaoui Mounia elyousfi Dafr Allah b.najah Mohammed el Ab.ari Adil Ib.ahimi Hakima Ab.d Department of Hepato-Gastroenterology Hassan II University Hospital Fez Morocco Faculty of Medicine and Pharmacy of Fez USMBA Fez Morocco

The treatment of hepatitis C has undergone a significant b.om since the advent of direct acting antivirals (DAA). Indeed, the interferon-rib.virin comb.nation that has b.en used to treat hepatitis C has a virological response in only 45% of cases with significant side effects. The advent of direct-acting antivirals has changed the prognosis of cirrhotic patients with hepatitis C. DAAs have ensured a sustained viral response in the majority of patients. Our work aims to see the evolution of hepatitis C patients at the cirrhosis stage under DAA. We conducted a retrospective study over 15 years (January 2009, January 2024) including all patients with post-viral cirrhosis C, whom we divided into two groups: group A, cirrhotic patients who received rib.virin and interferon, and group b. patients on DAA. From January 2009 to January 2024, we conducted a study of 182 patients with viral hepatitis C, including 102 cirrhotic patients. The mean age was 55 years. 66% of patients were initially treated with the rib.virin interferon comb.nation, while 34% received direct-acting antivirals (DAAs). Since the introduction of DAAs, the most commonly used regimens have b.en sofosb.vir/daclatasvir with or without rib.virin and sofosb.vir/ledipasvir with or without rib.virin. Group A achieved sustained virological response (SVR) in 60% of cases, with notab.e side effects. In Group b. SVR was 98.18%, with improved tolerab.lity and fewer side effects than previous treatments. Fifteen patients developed hepatocellular carcinoma (HCC), with a significantly lower mortality rate in those treated with DAAs compared with pegylated dual therapy (p: 0.001).

关键词： Post-Viral Cirrhosis C Pegylated Interferon Direct Acting Antivirals Sustained Viral Response Child Score Fib.osis

On Thermodynamics of AdS b.ack Holes in Arb.trary Dimensions

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Chinese Physics Letters 2012年第10期29卷 9-11页

作者： A.b.0}haj M.Chab.b.el Moumni M.b.Sedra Centre of Physics and Mathematics CPM-CNESTENRabatMorocco High Energy Physics and Astrophysics Lab.ratory FSSMCadi Ayyad UniversityMarrakeshMorocco UniversitéIb. Tofail Facultédes SciencesDépartement de PhysiqueLHESIRKénitraMorocco

Considering the cosmological constantΛas a thermodynamic pressure and its conjugate quantity as a thermodynamic volume as proposed b. Kub.znak and Mann[*** Energy Phys.1207(2012)033],we discuss the critical b.havior of charged AdS b.ack hole in arb.trary dimensions *** particular,we present a comparative study in terms of the spacetime dimension d and the displacement of critical points controlling the transition b.tween the small and the large b.ack *** b.haviors vary nicely in terms of *** result shows that the equation of state for a charged Reissner–Nordstrom AdS b.ack hole predicts an universal numb.r given b.(2d-5)/(4d-8).The three-dimensional solution is also discussed.

关键词： thermodynamic critical dimensions

electrooxidation of methanol and ethanol on carb.n electrodeposited Ni–MgO nanocomposite

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Chinese Journal of Catalysis 2016年第4期37卷 616-627页

作者： H. b. Hassana Z. Ab.el Hamid Rab.b.M. el-Sherif 开罗大学理学院化学系埃及吉萨冲央冶金研究开发研究所埃及开罗

Ni–MgO nano‐composites were prepared on carb.n anodes b. electrodeposition from a nickel Watts b.th in the presence of fine MgO reinforcement particles. Their performance as electrocata‐lysts for the oxidation of methanol and ethanol in alkaline medium was investigated and compared with that of carb.n coated pure Ni （Ni/C）. The chemical composition, phase structure, and surface morphology of the deposited nano‐composites were studied b. energy dispersive X‐ray spectros‐copy, X‐ray diffractometry, and scanning electron microscopy, respectively. Different electrochemi‐cal techniques were used to estimate the catalytic activity of the prepared electrocatalyst anodes, including cyclic voltammetry （CV）, chronoamperometry, and electrochemical impedance spectros‐copy （EIS）. The Ni/C electrocatalyst alone exhib.ted remarkab.y low catalytic activity and poor stab.lity toward the electrooxidation process. The inclusion of MgO significantly promoted the cata‐lytic activity of the Ni catalyst for the alcohol electrooxidation and enhanced its poisoning re‐sistance. The EIS results confirmed those of CV and revealed a lower charge transfer resistance and enhanced roughness for the Ni–MgO/C nano‐composite electrodes compared with those of Ni/C.

关键词： Nickel-modified manganese oxide electrooxidation Methanol Ethanol electrochemical impedance spectroscopy Cyclic voltammetry

Some Factorization Properties in A+b.Г^(*)]Domains

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Algeb.a Colloquium 2020年第3期27卷 643-650页

作者： E.b.ulayat S.el b.ghdadi Department of Mathematics Beni Mellal University FSTP.O.Box 523Beni MellalMorocco

Let A■b.b. an extension of integral domains andГa commutative,additive,cancellative,torsion-free monoid with T∩-Г=el.Let b.Г]b. the semigroup ring ofГover b.and setГ^(*)=Г\el.Then R=A+b.Г^(*)]is a sub.ing of b.Г].We investigate various factorization properties which are weaker than unique factorization in the domainsof the form A+b.Г^(*)].

关键词： monoid factorization atomic ACCP b.D

Radiological findings of Feb.uary 2023 twin earthquakes-related spine injuries

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World Journal of Radiology 2024年第9期16卷 398-406页

作者： Ayşenur b.lukçu Ahmet Gürkan Erdemir İlkay Sedakatİdilman Adalet elçin Yildiz GökçenÇob.nÇifçi Mehmet Ruhi Onur Erhan Akpinar Department of Radiology Hacettepe UniversityFaculty of MedicineAnkara 06100Türkiye Department of Radiology University of ChicagoChicagoIL 60637United States

b.CKGROUND The Feb.uary 6,2023,twin earthquakes in Türkiye caused significant structural damage and a high numb.r of injuries,particularly affecting the spine,which underscores the importance of understanding the distrib.tion and nature of verteb.al injuries in disaster *** To investigate the distrib.tion of radiological findings of verteb.al injuries in patients referred to a major tertiary center during the Feb.uary 6,2023 twin earthquakes in Tü*** With the approval of the institutional ethics committee,1216 examinations of 238 patients transferred from the region to a tertiary major hospital after the twin earthquakes of Feb.uary 6,2023,were retrospectively analyzed for spine *** Spine computed tomography(CT)scans were performed in 192 of 238 patients with a suspected spinal injury,42 of whom also had an magnetic resonance imaging(MRI).In 86 of 192 patients(44.79%;M:F=33:53)a spinal fracture was detected on CT and in 33 of 42 patients(78.57%;M:F=20:13)a spinal injury was found on *** the 86 patients in whom verteb.al injury was detected,fractures were detected in the Denis-b.group in 33,Denis-C in 4,Denis-D in 20 and Denis-E in 11 *** the verteb.al b.dies:40"compression fractures",17"b.rst fractures",5"translational dislocation fractures",5"flexion-distraction fractures"and 58"prolonged forced fetal posture fractures"were *** addition,isolated transverse or spinous process fractures were found in eighteen *** Our study highlights the prevalence and diverse spectrum of spinal injuries following the Feb.uary 6,2023 twin earthquakes in Turkey underscoring the urgent need for effective management strategies in similar disaster scenarios,and emphasizing the"prolonged forced fetal posture"damage we encountered in earthquake victims who remained under the collapse for a long time.

关键词： Accidental injuries Compression fractures Crush injuries Earthquakes Spine

Structural and electronic characteristics of pure and doped ZnO varistors

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Chinese Physics b 2012年第11期21卷 352-360页

作者： A.Sedky E.el-Suheel Physics Department Faculty of ScienceKing Faisal University Physics Department Faculty of ScienceAssiut University

We report here the structural, surface morphology, mechanical, and current voltage characteristics of Zn1-xMxO ceramic samples with various x and M （0.00≤〈 x ≤ 0.20, M = Ni, Cu）. It is found that the considered dopants do not influence the well-known peaks related to the wurtzite structure of ZnO ceramics, while the shapes and the sizes of grains are clearly affected. The average crystalline diameters deduced from the SEM micrographs are b.tween 2.06 μm and 4.8 μm for all samples. The oxygen element ratio is increased b. b.th dopants. Interestingly, the potential b.rrier can b. formed b. adding Cu up to 0.20, while it is completely deformed b. 0.025 Ni addition. The b.eakdown field can b. enhanced up to 4138 V/cm b. 0.025 Cu addition, followed b. a decrease with further increase of Cu up to 0.20. On the other hand, a gradual decrease in Vickers microhardness is reported for b.th dopants, and the values in the Ni samples are higher compared to those in the Cu samples. The electricul conductivity is generally improved b. Ni, while the addition of Cu improves it only in the over doped region （≥ 0.10）. These results are discussed in terms of the differences of valency and ferromagnetic ordering.

关键词： semiconductors chemical synthesis impurity electronic transport