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Depression, Anxiety, Stress and Their Association with the Use of Electronic Devices among Adolescents during the COVID-19 Pandemic

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International Journal of Mental Health Promotion 2022年第2期24卷 251-262页

作者： ahmad y.alqassim Mohamed S.Mahfouz Mohammed M.Hakami Abdullah A.Al Faqih ahmad A.Shugairi Malek R.Alsanosy Ahmed y.Rayyani AbdulAziz y.Albrraq Mohammed A.Muaddi Abdullah A.Alharbi Family and Community Medicine Department Faculty of MedicineJazan UniversityJazanSaudi Arabia

Background:Adolescence is a critical,multifactorial developmental *** the current pandemic of COVID-19,excessive using of electronic devices is a public health *** aim of this study is to investigate the relation-ship between depression and the use of electronic devices among secondary school children in Jazan,Saudi Arabia during the COVID-19 *** and Methods:The study is an observational,cross-sectional *** was collected using an anonymous online survey *** the Depression Anxiety Stress ***:A total of 427 participants were included in the *** prevalence of depression,anxiety,and stress in our study was 14.55%,12.01%,and 15.55%,*** the hours spent on electronic devices,13.6%of participants spent 1–4 h,43.6%spent 5–9 h,and 42.9%spent 10 h or more.86.7%reported an increase in their use of electronic devices during *** regression analysis revealed that the increase of Videogame Addiction Scale for Chil-dren is signiﬁcantly associated with an increase in Depression,Anxiety,and Stress scores(p-valuey found a positive correlation between electronic device use and increased prevalence of mental health *** also found signiﬁcantly increased use of electronic device during the COVID-19 lockdown;hence,more mental issues were *** is obvious that electronic device use needs to be more controlled among *** can be achieved by involving those who are in this age group in other activities,like sports,which can reduce the time they spend on electronic device.

关键词： COVID-19 depression electronic devices adolescents public health environmental health

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Exploring the Prevalence and Contributing Factors of Depression among Sickle Cell Anemia Patients in Saudi Arabia’s Jazan Region

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International Journal of Mental Health Promotion 2024年第5期26卷 351-359页

作者： Abdullah A.Alharbi ahmad y.alqassim Mohammed A.Muaddi Najat H.Aldubayyan Rana I.Abuhadi Futon A.Akoor Sarah J.Mobarki Imtenan A.Oberi Ghaidaa H.Alharbi yara Ajeebi Adnan M.Alkhayat Hafiz Malhan Mohammed Bakkar Anwar M.Makeen Family and Community Medicine Department Faculty of MedicineJazan UniversityJazan45142Saudi Arabia Laboratory Department King Fahd Central HospitalMinistry of HealthJazan45142Saudi Arabia Internal Medicine Department Prince Mohammad bin Nasser HospitalMinistry of HealthJazan45142Saudi Arabia Hematology Department King AbdulAziz Medical City for National GuardRiyadh11426Saudi Arabia

Sickle Cell Anemia(SCA)is a prevalent genetic condition in Saudi Arabia,particularly in the Jazan *** study’s purpose was to assess the prevalence of de-pression among individuals with SCA in this area and to identify the factors associated with this *** study involved 391 adult participants,all patients in the hematology center of Prince Mohammed bin Nasser Hospital(PMNH).Data was collected through an anonymous interview questionnaire–the Arabic version of the Patient Health Questionnaire-9(PHQ-9)–between March–May *** questionnaire covered socio-demographic information and variables related to the participant’s SCA history,such as pain levels,frequency of pain,hospitalization duration,and frequency of blood *** variables underwent Chi-square and One-way ANOVA testing,followed by multivariate *** study found a 42%prevalence of depression among the SCA *** significantly linked with heightened depression levels included being widowed or divorced,experiencing frequent and severe pain,and longer duration of hospital *** educational level of at least a bachelor’s degree was also a significant *** study reveals a high prevalence of depression among SCA patients in the Jazan *** underscores the need for policymakers to educate both physicians and patients about the importance of mental health in SCA *** study also highlights the need for more research into the specific causes and effects of depressive symptoms in SCA patients to inform the creation of effective management plans.

关键词： Sickle cell anemia prevalence depression public health policy Jazan region Saudi Arabia

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Leveraging ROTI map derived from Indonesian GNSS receiver network for advancing study of Equatorial Plasma Bubble in Southeast/East Asia

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Earth and Planetary Physics 2025年第1期9卷 101-116页

作者： Prayitno Abadi Ihsan N.Muafiry Teguh N.Pratama Angga y.Putra Suraina Gatot H.Pramono Sidik T.Wibowo Febrylian F.Chabibi Umar A.ahmad Wildan P.Tresna Asnawi Research Center for Climate and Atmosphere Indonesian National Research and Innovation Agency(BRIN)BandungIndonesia School of Electrical Engineering Telkom UniversityBandungIndonesia Directorate of Laboratory Management Facilities and Science and Technology Park Indonesian National Research and Innovation Agency(BRIN)PontianakIndonesia Geophysics Laboratory Master Program in PhysicsUniversitas Gadjah Mada(UGM)YogyakartaIndonesia Research Center for Space Indonesian National Research and Innovation Agency(BRIN)BandungIndonesia Indonesian Geospatial Information Agency(BIG) JakartaIndonesia Research Center for Photonics Indonesian National Research and Innovation Agency(BRIN)Tangerang SelatanIndonesia Department of Earth and Planetary Sciences Hokkaido UniversitySapporoJapan

This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signals and degrade positioning *** by the Indonesian Geospatial Information Agency(BIG),the Indonesia Continuously Operating Reference Station(Ina-CORS)network comprises over 300 GNSS receivers spanning equatorial to southern low-latitude ***-CORS is uniquely situated to monitor EPB generation,zonal drift,and dissipation across Southeast *** provide a practical tool for EPB research,by sharing two-dimensional rate of Total Electron Content(TEC)change index(ROTI)derived from this *** generate ROTI maps with a 10-minute resolution,and samples from May 2024 are publicly available for further scientific *** preliminary findings from the ROTI maps of Ina-CORS are ***,the Ina-CORS ROTI maps reveal that the irregularities within a broader EPB structure persist longer,increasing the potential for these irregularities to migrate farther ***,we demonstrate that combined ROTI maps from Ina-CORS and GNSS receivers in East Asia and Australia can be used to monitor the development of ionospheric irregularities in Southeast and East *** have demonstrated the combined ROTI maps to capture the development of ionospheric irregularities in the Southeast/East Asian sector during the G5 Geomagnetic Storm on May 11,*** observed simultaneous ionospheric irregularities in Japan and Australia,respectively propagating northwestward and southwestward,before midnight,whereas Southeast Asia’s equatorial and low-latitude regions exhibited irregularities *** sharing ROTI maps from Indonesia and integrating them with regional GNSS networks,researchers can conduct comprehensive EPB studies,enhancing the understanding of EPB behavior across Southeast and East Asia and contributing significantly to ionosphe

关键词： Equatorial Plasma Bubble(EPB) GNSS receivers’network Indonesia Continuously Operating Reference Station(Ina-CORS) ionospheric map Rate of TEC change index(ROTI)map

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Enhancement of Gain in L-Band Bismuth-Based Erbium-Doped Fibre Amplifier Using an Un-pumped EDF and Midway Isolator

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Chinese Physics Letters 2004年第12期21卷 2452-2453页

作者： W.y.Chong S.W.Harun H.ahmad PhotonicsLaboratory DepartmentofPhysicsUniversityofMalaya50603KualaLumpur FacultyofEngineering MultimediaUniversityJalanMultimedia63100CyberjayaSelangorMalaysia

A hybrid L-band erbium-doped fibre amplifier (EDFA) with enhanced gain characteristic is demonstrated without a significant noise figure penalty. It uses a backward C-band amplified stimulated emission from both the ends of a bismuth-based EDFA system to pump an unpumped erbium-doped fibre (EDF) for gain enhancing. The maximum gain enhancement of 4.0dB is obtained at wavelength 1604nm with EDF length of 20m. The gain spectrum is reasonably flat in this amplifier compared with the amplifier without an EDF. The gain varies from 27.4dB to 30.2dB at wavelength region 1564–1608nm with incorporation of 20m EDF. Noise figure also varies from 6.0 to 7.7dB at this wavelength region.

关键词： Erbium doped fiber amplifiers

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Poisson-Boltzmann Theory of Bionanosystems

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Communications in Computational Physics 2008年第5期3卷 1100-1116页

作者： A.Sayyed-ahmad y.Miao P.Ortoleva Center for Cell and Virus Theory Department of ChemistryIndiana UniversityBloomington IN 47405USA.

The structure and function of BNS(bionanosystems)such as macromolecules,viruses and ribosomes are strongly affected by electrostatic *** their supra-million atom size makes them difficult to simulate via a straightforward PoissonBoltzmann(PB)*** we explore a multiscale approach that results in a coarse-grained PB equation that follows rigorously from the all-atom PB *** derivation of the coarse-grained equation follows from an ansatz on the dependence of the electrical potential in two distinct ways,*** reflecting atomic-scale variations and the other capturing nanometer-scale *** this ansatz and a series expansion of the potential in a length-scale ratio,the coarse-grained PB equation is *** multiscale methodology and an efficient computational methodology provide a way to efficiently simulate BNS electrostatics with atomic-scale resolution for the first time,avoiding the need for excessive supercomputer *** coarse-grained PB equation contains a tensorial dielectric constant that mediates the channeling of the electric field along macromolecules in an aqueous *** multiscale approach and novel salinity connections to the PB equation presented here should enhance the accuracy and wider applicability of PB modeling。

关键词： Poisson-Boltzmann equation multiscale analysis bionanostructures viruses ribosomes macromolecules.

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Optimal Deep Learning Based Inception Model for Cervical Cancer Diagnosis

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Computers, Materials & Continua 2022年第7期72卷 57-71页

作者： Tamer AbuKhalil Bassam A.y.Alqaralleh ahmad H.Al-Omari Computer Science Department Faculty of Information TechnologyAl Hussein bin Talal UniversityMa’an71111Jordan MIS Department College of Business AdministrationUniversity of Business and TechnologyJeddah21448Saudi Arabia Faculty of Science Computer Science DepartmentNorthern Border UniversityArar91431Saudi Arabia

Prevention of cervical cancer becomes essential and is carried out by the use of Pap smear *** smear test analysis is laborious and tiresome work performed visually using a ***,automated cervical cancer diagnosis using automated methods are *** paper designs an optimal deep learning based Inception model for cervical cancer diagnosis(ODLIM-CCD)using pap smear *** proposed ODLIM-CCD technique incorporates median filtering(MF)based pre-processing to discard the noise and Otsu model based segmentation ***,deep convolutional neural network(DCNN)based Inception with Residual Network(ResNet)v2 model is utilized for deriving the feature ***,swallow swarm optimization(SSO)based hyperparameter tuning process is carried out for the optimal selection of ***,recurrent neural network(RNN)based classification process is done to determine the presence of cervical cancer or *** order to showcase the improved diagnostic performance of the ODLIM-CCD technique,a series of simulations occur on benchmark test images and the outcomes highlighted the improved performance over the recent approaches with a superior accuracy of 0.9661.

关键词： Median filtering convolutional neural network pap smear cervical cancer

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The effect of positive/negative ion on the dust grain charging process in a Vasyliunas-Cairns (VC)-distributed dusty plasma system

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Plasma Science and Technology 2019年第6期21卷 58-62页

作者： N ahmad A A ABID y AL-HADEETHI M N S QURESHI Saqib REHMAN Department of Engineering and Applied Physics University of Science and Technology of China Hefei 230026 People's Republic of China CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary ScienceUniversity of Science and Technology of China Hefei 230026 People's Republic of China Department of Physics Faculty of Sciences King Abdulaziz Unniversity Jeddah 21589 Saudi Arabia Department of Physics GC University Lahore 54000 Pakistan Department of Chemical Physics University of Science and Technology of China Hefei 230026People's Republic of China

Charging mechanism of dust particles has been considered as a growing research area in dusty plasma physics because of its exciting *** this paper,we consider a low-temperature non-equilibrium multispecies plasma model,which consists of Vasyliunas-Caims (VC) distributed electrons,negative/positive streaming ions,and negatively-charged dust grains to explain the charging mechanism of dust *** main theme of this work is to derive expressions of currents for negatively-charged dust grains (considering an equilibrium state position) in the plasma environment comprised of electrons and positive/negative streaming ions using the VC distribution *** proposed model shows that the dust grain surface potential is significantly affected by different plasma parameters such as the negative ion streaming velocity (Sn),positive ion streaming velocity (Si),spectral indices of VC distribution,negative ion charging state (Zn),positive ion charging state (Zi),and negative ion number density (ρ).

关键词： dust grain surface potential vasyliunas-cairns power law velocity distribution function multi species plasma

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Modelling synergistic interactions between HER2, Sprouty2 and PTEN in driving prostate carcinogenesis

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Asian Journal of Andrology 2013年第3期15卷 323-327页

作者： Imran ahmad Meiling Gao Rachana Patel Hing y Leung The Beatson Institute for Cancer Research Glasgow G61 1BD UK Institute for Cancer Sciences University of Glasgow Glasgow G61 1BD UK Department of Urology NHS Greater Glasgow and Clyde Glasgow G12 OYN UK

Prostate cancer remains a major global health issue and a major cause of mor-bidity and mortality in men worldwide. Activation of androgen receptor and inac- tivation of the tumour suppressor gene phosphatase and tensin homologue （PTEN） represent two major events in prostate carcinogenesis. Using a range of clinical resources, in vitro and in vivo models, we explored potential complex interactions among receptor tyrosine kinases （such as HER2/3 and EGFR） and tumour suppressor genes, namely,

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Nitric oxide activation of a potassium channel (BK_(Ca)) in feline lower esophageal sphincter

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World Journal of Gastroenterology 2010年第46期16卷 5852-5860页

作者： Marie-Claude L'Heureux ahmad Muinuddin Herbert y Gaisano Nicholas E Diamant Department of Physiology University of Toronto ahmad Muinuddin Nicholas E DiamantToronto Western Research InstituteUniversity Health Network Department of Medicine University of Toronto

AIM:To assess the effect of nitric oxide (NO) on the large conductance potassium channel (BKCa) in isolated circular (CM) and sling (SM) muscle cells and muscle strips from the cat lower esophageal sphincter (LES) to determine its regulation of resting tone and ***:Freshly enzymatically-digested and isolated circular smooth muscle cells were prepared from each LES *** study outward K + currents,the perforated patch clamp technique was *** assess LES resting tone and relaxation,muscle strips were mounted in perfused organ ***:(1) Electrophysiological recordings from isolated cells:(a) CM was more depolarized than SM (-39.7 ± 0.8mV vs-48.1 ± 1.6 mV,P 0.05);(b) The NO donor sodium nitroprusside (SNP) increased outward currents only in CM (25.9 ± 1.9 to 46.7 ± 4.2 pA/pF,P 0.05);(c) SNP added in the presence of the BK Ca antagonist iberiotoxin (IbTX) produced no increase in the outward current in CM (17.0 ± 2.8 vs 13.7 ± 2.2,P > 0.05);and (d) L-NNA caused a small insignificant inhibition of outward K + currents in both muscles;and (2) Muscle strip studies:(a) Blockade of the nerves with tetrodotoxin (TTX),or BK Ca with IbTX had no significant effect on resting tone of either muscle;and (b) SNP reduced tone in both muscles,and was unaffected by the presence of TTX or ***:Exogenous NO activates BK Ca only in CM of the ***,as opposed to other species,exogenous NO-induced relaxation is predominantly by a non-BK Ca mechanism,and endogenous NO has minimal effect on resting tone.

关键词： Circular smooth muscle Feline K+ channel Lower esophageal sphincter Nitric oxide Sling Tone

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Physical origin of observed nonlinearities in Poly(1-naphthyl methacrylate):Using a single transistor–transistor logic modulated laser beam

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Chinese Physics B 2013年第11期22卷 331-336页

作者： Qusay M.A.Hassan Hussain A.Badran Alaa y.AL-ahmad Chassib A.Emshary Department of Physics College of Education University of Basrah

A thermal lens technique is adopted using a single modulated continuous wave （cw） 532-nm laser beam to evaluate the nonlinear refractive index n2, and the thermo-optic coefficient dn/dT, in polymer Poly （1-naphthyl methacrylate）（P-1-NM） dissolved in chloroform, tetrahydrofuran （THF）, and dimethyl sulfoxide （DMSO） solvents. The results are compared with Z-scan and diffraction ring techniques. The comparison reveals the effectiveness and the simplicity of the TTL modulation technique. The physical origin is discussed for the obtained results.

关键词： nonlinear refractive index thermo-optic coefficient self-phase modulation nonlinear optics

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