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Facial Expression Recognition Model Depending on Optimized Support Vector Machine

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Computers, Materials & Continua 2023年第7期76卷 499-515页

作者： Amel Ali Alhussan Fatma M.Talaat El-Sayed M.El-kenawy Abdelaziz A.Abdelhamid Abdelhameed Ibrahim Doaa Sami Khafaga mona Alnaggar Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Machine Learning&Information Retrieval Department Faculty of Artificial IntelligenceKafrelsheikh UniversityKafrelsheikh33516Egypt Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt Department of Computer Science College of Computing and Information TechnologyShaqra University11961Saudi Arabia Department of Computer Science Faculty of Computer and Information SciencesAin Shams UniversityCairo11566Egypt Computer Engineering and Control Systems Department Faculty of EngineeringMansoura UniversityMansoura35516Egypt Robotics and Intelligent Machines Department Faculty of Artificial IntelligenceKafrelsheikh UniversityKafrelsheikh33516Egypt

In computer vision,emotion recognition using facial expression images is considered an important research *** learning advances in recent years have aided in attaining improved results in this *** to recent studies,multiple facial expressions may be included in facial photographs representing a particular type of *** is feasible and useful to convert face photos into collections of visual words and carry out global expression *** main contribution of this paper is to propose a facial expression recognitionmodel(FERM)depending on an optimized Support Vector Machine(SVM).To test the performance of the proposed model(FERM),AffectNet is *** uses 1250 emotion-related keywords in six different languages to search three major search engines and get over 1,000,000 facial photos *** FERM is composed of three main phases:(i)the Data preparation phase,(ii)Applying grid search for optimization,and(iii)the categorization *** discriminant analysis(LDA)is used to categorize the data into eight labels(neutral,happy,sad,surprised,fear,disgust,angry,and contempt).Due to using LDA,the performance of categorization via SVM has been obviously *** search is used to find the optimal values for hyperparameters of SVM(C and gamma).The proposed optimized SVM algorithm has achieved an accuracy of 99%and a 98%F1 score.

关键词： Facial expression recognition machine learning linear dis-criminant analysis(LDA) support vector machine(SVM) grid search

An Optimized Approach for Spectrum Utilization in mmWave Massive MIMO 5G Wireless Networks

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Computer Systems Science & Engineering 2023年第11期47卷 1493-1505页

作者： Elsaid Md.Abdelrahim mona Alduailij Mai Alduailij Romany F.Mansour Osama A.Ghoneim Faculty of Science Northern Border UniversityArarSaudi Arabia Faculty of Science Tanta UniversityTantaEgypt Computer Sciences Department College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia Department of Mathematics Faculty of ScienceNew Valley UniversityEl-Kharga72511Egypt Faculty of Computers and Information Tanta UniversityEl-GieshEgypt

Massive multiple-input multiple-output(MIMO)systems that use the millimeter-wave(mm-wave)band have a higher frequency and more antennas,which leads to significant path loss,high power consumption,and server *** to these issues,the spectrum efficiency is significantly reduced,making spectral efficiency improvement an important research topic for 5G *** with communication in the terahertz(THz)bands,mmWave communication is currently a component of the 5G standards and is seen as a solution to the commercial bandwidth *** quantity of continuous,mostly untapped bandwidth in the 30–300 GHz band has presented a rare opportunity to boost the capacity of wireless *** wireless communications and consumer electronics industries have recently paid a lot of attention to wireless data transfer and media streaming in the mmWave frequency *** massive MIMO beamforming technology cannot successfully prevent interference between multiple networks in the current spectrum-sharing schemes,particularly the complex interference dispersed in indoor communication systems such as homes,workplaces,and *** effectively improve spectrum utilization and reduce co-channel interference,this paper proposes a novel *** main idea is to utilize the spectrum in software-defined mmWave massive MIMO networks through coordinated and unified ***,the optimal interference threshold is determined through the beam alignment ***,a greedy optimization algorithm is used to allocate optimal spectral resources to the *** results show that the proposed algorithm improved spectral efficiency and reduced interference.

关键词： mmWave massive MIMO 5G networks SDN spectral efficiency

Predictors of anti-SARS-CoV-2 seropositivity:An Egyptian population-based study

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Infectious Medicine 2022年第2期1卷 113-123页

作者： Engy Mohamed El-Ghitany Ayat Ashour Azza Galal Farghaly mona H.Hashish Eman A.Omran Department of Tropical Health High Institute of Public HealthAlexandria UniversityAlexandriaEgypt Department of Family Health High Institute of Public HealthAlexandria UniversityAlexandriaEgypt Department of Microbiology High Institute of Public HealthAlexandria UniversityAlexandriaEgypt

Background:Population-based studies on the determinants of COVID-19 seroprevalence constitute a cornerstone in guiding appropriate preventive *** studies are scarce in Egypt,thus we conducted this study to explore risk factors for SARS-CoV-2 ***:This survey included 2919 participants from 10 Egyptian *** were tested for SARS-CoV-2 spike(S)and nucleocapsid(N)*** and multivariate analyses were performed to identify associated factors and predictors of seropositivity regarding sociodemographic factors,clinical data,and personal practices of participants.A subgroup analysis was performed to investigate the occupational risks of ***:Seropositivity was recorded in 1564 participants(53.6%).Independent predictors of seropositivity in-cluded non-smokers(aOR=1.817;95%CI:1.407-2.346,p=0.000),having blood group A(aOR=1.231;95%CI:1.016-1.493,p=0.034),a history of COVID-19 infection(aOR=2.997;95%CI:2.176-4.127,p=0.000),COVID-19 vaccination(aOR=4.349;95%CI:2.798-6.759,p=0.000),higher crowding index(aOR=1.229;95%CI:1.041-1.451,p=0.015),anosmia and/or ageusia(aOR=3.453;95%CI:2.661-4.481,p=0.000)and history of fever(aOR=1.269;95%CI:1.033-1.560,p=0.023).Healthcare worker and Obesity/overweight were additional significant predictors of seropositivity among the working participants(aOR=1.760;95%CI:1.301-2.381,p=0.000 and aOR=1.384;95%CI:1.059-1.808,p=0.019,respectively).Additional factors showing association with seropositivity in the univariate analysis were:female gender,age group(15-39 years),higher educational level(preparatory and above),lack of environmental disinfection and having roommates at the *** was a positive correlation between the titers of both *** was weakly corre-lated with anti-S titer,while anti-N was significantly correlated with the number of protective measures applied by the *** antibodies were significantly correlated with adult BMI,while both we

关键词： COVID-19 Predictors Seroprevalence Anti-spike Anti-nucleocapsid

High-throughput terahertz imaging:progress and challenges

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Light(Science & Applications) 2023年第10期12卷 2053-2073页

作者： Xurong Li Jingxi Li Yuhang Li Aydogan Ozcan mona Jarrahi Department of Electrical&Computer Engineering University of California Los Angeles(UCLA)Los AngelesCA90095USA California NanoSystems Institute(CNSI) University of California Los Angeles(UCLA)Los AngelesCA 90095USA Department of Bioengineering University of California Los Angeles(UCLA)Los AngelesCA 90095USA

Many exciting terahertz imaging applications,such as non-destructive evaluation,biomedical diagnosis,and security screening,have been historically limited in practical usage due to the raster-scanning requirement of imaging systems,which impose very low imaging ***,recent advancements in terahertz imaging systems have greatly increased the imaging throughput and brought the promising potential of terahertz radiation from research laboratories closer to real-world ***,we review the development of terahertz imaging technologies from both hardware and computational imaging *** introduce and compare different types of hardware enabling frequency-domain and time-domain imaging using various thermal,photon,and field image sensor *** discuss how different imaging hardware and computational imaging algorithms provide opportunities for capturing time-of-flight,spectroscopic,phase,and intensity image data at high ***,the new prospects and challenges for the development of future high-throughput terahertz imaging systems are briefly introduced.

关键词： hardware closer terahertz

Misdiagnosis of Facial Nerve Palsy: A Case Report of Sporadic Vestibular Schwannomas (Non-NFM2) Causing Facial Nerve Palsy Be Misled by Bell’s Palsy in a Child

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Open Journal of Pediatrics 2023年第4期13卷 515-522页

作者： Heba Şeyhibrahim mona Jawish Allaa Shaikh Ibrahim Altinbas Medical School Altinbas University Istanbul Türkiye Pediatric Emergency Department Security Forces Hospital Riyadh Saudi Arabia Alfaisal Medical School Alfaisal University Riyadh Saudi Arabia

We report a case of a rare sporadic Vestibular Schwannoma of a 9-month-old girl who had a right-sided lower motor type facial nerve palsy. The patient was initially diagnosed with Bell’s palsy and received steroid treatment accordingly, two months later the patient’s condition deteriorated, and further evaluation of CT and MRI brain was conducted that showed a mass lesion in the posterior fossa causing compression on the facial nerve. Misdiagnosis of facial nerve paralysis is common among children due to multiple related etiologies and varying rates of incidence in comparison to adults. The authors hope to address this issue in this report. Background: Facial nerve paralysis has been a matter of concern for many researchers to understand its nature, causes and presentation according to different age groups. In adults, Bell’s palsy (BP), the idiopathic form of facial nerve paralysis, is more common compared to children where most cases are due to secondary etiologies. Therefore, pediatricians are in an important position to identify these patients early in order to launch the most effective diagnostic and treatment approaches.

关键词： Emergency Medicine Facial Never Palsy Bell’s Palsy Infants the Pediatric Vestibular Schwannoma

Analysis of Risk Factors for Early Mortality in Surgical Shunt Palliation:Time for a Change?

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Congenital Heart Disease 2023年第5期18卷 539-550页

作者： François-Xavier Van Vyve Karlien Carbonez Jelena Hubrechts Geoffroy de Beco Jean ERubay mona Momeni Thierry Detaille Alain J.Poncelet Department of Cardiovascular and Thoracic Surgery Universitécatholique de Louvain(UCLouvain)-Cliniques Universitaires Saint-LucBrusselsBelgium Department of Pediatric Cardiology Universitécatholique de Louvain(UCLouvain)-Cliniques Universitaires Saint-LucBrusselsBelgium Department of Anesthesiology Universitécatholique de Louvain(UCLouvain)-Cliniques Universitaires Saint-LucBrusselsBelgium Department of Pediatric Intensive Care Universitécatholique de Louvain(UCLouvain)-Cliniques Universitaires Saint-LucBrusselsBelgium

Objectives:Over the last decade,neonatal repair has been advocated for many congenital heart ***,specific subgroups of complex congenital heart disease still require temporary palliation for which both surgical and endovascular techniques are currently *** reviewed our institutional experience with shunt palliation with an emphasis on risk factors for early ***:This is a single-center retrospective study on 175 patients undergoing surgery for central shunt or modified Blalock-Taussig *** data were extracted from a prospectively collected computerized *** identified risk factors for early mortality by uni-and multi-variable *** data were censored at the time of death or shunt take-down ***:Mean age and weight at surgery were 24 days(IQR[7–95])and 3.4 kg(IQR[2.9–4.8]),respectively,with 96 neonates(55%).Most patients had a biventricular heart disease(115 patients,66%),and 51 patients(29.1%)had univentricular heart *** was performed in 129 patients(74%).Cardiopulmonary bypass was used in 23 patients(13%).The median intensive care and overall length of stay were 4 days(IQR[2–9])and 18 days(IQR[13–29]),***-hospital mortality was 8.6%(15/175).By multivariable regression analysis,prematurity(HR 5.6[2.1–14.7]),CPB use(HR 6.7[2.2–18.6]),unplannedmonary bypass is contemplated,alternative endovascular techniques of palliation should be considered together with longitudinal follow-up studies.

关键词： Congenital heart disease cyanosis palliation neonates outcome

Baseline moderate-range albuminuria is associated with protection against severe COVID-19 pneumonia

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World Journal of Diabetes 2022年第12期13卷 1154-1167页

作者： Amir Bashkin mona Shehadeh Lina Shbita Kamil Namoura Ronza Haiek Elena Kuyantseva Yousef Boulos Orly Yakir Etty Kruzel-Davila Department of Diabetes Endocrinologyand MetabolismGalilee Medical CenterNahariya 2210001Israel Azrieli Faculty of Medicine Bar-Ilan UniversityZefat 1311502Israel Clinical Laboratories Division Clinical Biochemistry and Endocrinology LaboratoryGalilee Medical CenterNahariya 2210001Israel Internal Medicine A Galilee Medical CenterNahariya 2210001Israel Statistical Analysis Division Galilee Medical CenterNahariya 2210001Israel Department of Nephrology Galilee Medical CenterNahariya 2210001Israel

BACKGROUND Diabetes mellitus is considered a leading contributor to severe coronavirus disease 2019(COVID-19).AIM To characterize differences between hospitalized diabetic patients with vs without COVID-19,and parameters associated with COVID-19 severity for *** This case-control study included 209 patients with type 2 diabetic mellitus hospitalized at the Galilee Medical Center(Nahariya,Israel)and recruited between September 2020 and May 2021,65 patients with COVID-19 infection in dedicated wards and 144 COVID-19-negative patients in internal medicine wards hospitalized due to other *** parameters-including age,type of antiglycemic medications,presence of retinopathy,smoking history,body mass index(BMI),glycosylated hemoglobin,maximum neutrophil:lymphocyte ratio(NLR_(max)),C-reactive protein(CRP),estimated glomerular filtration rate(eGFR),and albumin(blood and urine)-were compared between the two primary patient groups,and then between COVID-19-negative patients hospitalized due to infectious vs non-infectious ***,we explored which parameters were associated with severe COVID-19 *** COVID-19-negative patients were older(63.9±9.9 vs 59.8±9.2,P=0.005),and had longer duration of diabetes(P=0.031),lower eGFR(P=0.033),higher albumin(P=0.026),lower CRP(P<0.001),greater smoking prevalence(P<0.001),and more baseline albuminuria(54.9%vs 30.8%,P=0.005)at admission;70%of COVID-19 patients with albuminuria had moderate-range albuminuria(albumin:creatinine 30-300 mg/g).Most of the patients with albuminuria had chronic kidney disease stage II(CKD II).Oral antiglycemic therapies were not significantly different between the two *** logistic regression showed that higher BMI was significantly associated with severe COVID-19(OR 1.24,95%CI:1.01-1.53,P=0.04),as was higher NLR_(max)(OR 1.2,95%CI:1.06-1.37,P=0.005).Surprisingly,pre-hospitalization albuminuria,mostly moderate-range,was associated with reduced risk(OR

关键词： Diabetes mellitus COVID-19 Albuminuria Severity Chronic kidney disease Immunomodulation

Investigation of a mutual interaction force at different pressure amplitudes in sulfuric acid

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Chinese Physics B 2011年第8期20卷 454-459页

作者： Nastaran Rezaee Rasoul Sadighi-Bonabi mona Mirheydari Homa Ebrahimi Department of Physics Sharif University of Technology11365-91TehranIran Department of Physics Islamic Azad University Central Tehran BranchTehranIran

This paper investiages the secondary Bjerknes force for two oscillating bubbles in various pressure amplitudes in a concentration of 95% sulfuric acid. The equilibrium radii of the bubbles are assumed to be smaller than 10 μm at a frequency of 37 kHz in various strong driving acoustical fields around 2.0 bars （1 bar=10^5 Pa）. The secondary Bjerknes force is investigated in uncoupled and coupled states between the bubbles, with regard to the quasi-adiabatic model for the bubble interior. It finds that the value of the secondary Bjerknes force depends on the driven pressure of sulfuric acid and its amount would be increased by liquid pressure amplitude enhancement. The results show that the repulsion area of the interaction force would be increased by increasing the driven pressure because of nonlinear oscillation of bubbles.

关键词： multi-bubble sonoluminescence secondary Bjerknes force coupled and uncoupled state,nonlinear oscillation

Degradation of polyacrylamide (PAM) and methane production by mesophilic and thermophilic anaerobic digestion: Effect of temperature and concentration

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Frontiers of Environmental Science & Engineering 2020年第6期14卷 75-85页

作者： mona Akbar Muhammad Farooq Saleem Khan Ling Qian Hui Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Sino-Japan Friendship Center for Environmental Protection Beijing 100029China

Polyacrylamide(PAM)is generally employed in wastewater treatment processes such as sludge dewatering and therefore exists in the ***,it degrades slowly and can deteriorate methane yield during anaerobic digestion(AD).The impact or fate of PAM in AD under thermophilic conditions is still *** study mainly focuses on PAM degradation and enhanced methane production from PAM-added sludge during 15 days of thermophilic(55°C)AD compared to mesophilic(35°C)*** and PAM dose from 10 to 50 g/kg TSS were *** results showed that PAM degraded by 76%to 78%with acrylamide(AM)content of 0.2 to 3.3 mg/L in thermophilic ***,it degraded only 21%to 30%with AM content of 0.5 to 7.2 mg/L in mesophilic *** methane yield was almost 230 to 238.4 mL/g VSS on the 8th day in thermophilic AD but was 115.2 to 128.6 mL/g VSS in mesophilic *** investigation revealed that thermophilic AD with continuous stirring not only enhanced PAM degradation but also boosted the organics release from the sludge with added PAM and gave higher methane yield than mesophilic AD.

关键词： Polyacrylamide(PAM)degradation Acrylamide(AM) Mesophilic anaerobic digestion Thermophilic anaerobic digestion Methane production