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Quality of life during COVID-19 pandemic:a community-based study in Dakahlia governorate,Egypt

Global Health Research and Policy 2022年第1期7卷 424-432页

作者： Shorouk mohsen Ragaa el-masry Olfat Farag Ali Doaa Abdel-Hady Department of Public Health and Preventive medicine Faculty of MedicineMansoura UniversityMansouraEgypt

Background:The sudden transmission of the novel coronavirus along with instant measures taken in response to the Coronavirus Disease 2019(COVID-19)pandemic caused many new challenges adversely disturbing quality of life(QoL).The objective of this study is to measure quality of life of the public during the COVID-19 pandemic and factors affecting it among ***:This is a community-based cross-sectional household study with analytic component conducted in an agricultural area in Dakahlia governorate,Egypt and included 500 *** were collected through a structured interview,and the collected data included socio-demographic characteristics as well as some data related to their habits and comorbidities,their experience with COVID-19 and data about QoL using the COV19-Impact on Quality of Life(COV19-QoL)scale Arabic version,after assessing Content validity and ***:The total QoL score(mean±standard deviation)is 2.3±0.6 and the score for QoL in general and perception of danger on personal safety show the highest mean with 2.6±*** lowest mean score is related to the perception of mental health deterioration(1.9±0.8).Independent predictors of the total QoL scale are sex(regression coefficient(95%CI)=0.1(0.02 to 0.2),p value=0.02),monthly income(regression coefficient(95%CI)=0.1(0.004 to 0.2),p value=0.04),knowing someone infected with COVID-19(regression coefficient(95%CI)=0.15(0.08 to 0.3),p value=0.001),and data collection time(regression coefficient(95%CI)=0.1(0.006 to 0.2),p value=0.04).Conclusions:COVID-19 pandemic has impacted the public quality of life,particularly in terms of general quality of life and personal *** with substantial predictors of lower quality of life should be given more attention.

关键词： COVID-19 Quality of life mental health Community-based participatory research

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Neutron and Ion Beams Emitted from Plasma Focus (112.5 J) Device

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Plasma Science and Technology 2010年第1期12卷 1-5页

作者： G.m.el-ARAGI Plasma Physics and Nuclear Fusion Department Nuclear Research Center

Preliminary results of recent experiments performed within the mather-type 112.5 J plasma focus device are presented. The ion beams from the focus device operated with deuterium filling at 1 mbar were registered using CR-39 solid state nuclear track detectors （SSNTD） and a Faraday cup detector for time-resolved measurements. The time-resolved neutron emission from the focus region measurements was detected with a photomultiplier tube （IP-28） optically coupled with a plastic scintillator NE 102.

关键词： plasmas neutron scintillator detectors photomultiplier Faraday

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Research in Astronomy and Astrophysics 2010年第12期10卷 1275-1286页

作者： mohsen Nejad-Asghar Department of Physics University of Mazandaran Research Institute for Astronomy and Astrophysics of maragha Department of Physics Damghan University

Theoretically, stars formed from the collapse of cores in molecular clouds. Historically, the core had been assumed to be a singular isothermal sphere （SIS）, and the collapse had been investigated in a self-similar manner. When the rotation and magnetic fields lead to non-symmetric collapse, a spheroidal shape may occur. Here, the result of the centrifugal force and magnetic field gradient is assumed to be in the normal direction to the rotational axis, and its components are supposed to be a fraction β of the local gravitational force. In this research, a collapsing SIS core is considered to find the importance that the parameter β plays in the oblateness of the mass shells, which are the crests of the expansion waves. We apply the Adomian decomposition method to solve the system of nonlinear partial differential equations because the collapse does not occur in a spherically symmetric and self-similar man- ner. In this way, we obtain a semi-analytical relation for the mass infall rate m of the shells in the envelope. Near the rotational axis, m˙ decreases with the increase of the non-dimensional radius ξ, while a direct relation is observed between m˙ and ξ in the equatorial regions. Also, the values of m˙ in the polar regions are greater than their equatorial values, and this difference occurs more often at smaller values of ξ. Overall, the results show that before reaching the crest of the expansion wave, the visible shape of the molecular cloud cores can evolve into oblate spheroids. The ratio of major to minor axes of oblate cores increases when increasing the parameter β, and its value can approach the observed elongated shapes of cores in the maps of molecular clouds, such as those in Taurus and Perseus.

关键词： ISm: clouds -- ISm: evolution -- stars: formation - methods: analytical

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Nonlinear forced vibration in a subcritical regime of a porous functionally graded pipe conveying fluid with a retaining clip

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 101-122页

作者： m.GHOLAmI m.EFTEKHARI Department of mechanical Engineering Shahid Bahonar University of Kerman

This study examines the nonlinear behaviors of a clamped-clamped porous pipe made of a functionally graded material(FGm) that conveys fluids and is equipped with a retaining clip, focusing on primary resonance and subcritical dynamics. The nonlinear governing equations for the FGm pipe are derived by the extended Hamilton's principle, and subsequently discretized through the application of the Galerkin *** direct method of multi-scales is then used to solve the derived equations. A thorough analysis of various parameters, including the clip stiffness, the power-law index, the porosity, and the clip location, is conducted to gain a comprehensive understanding of the system's nonlinear dynamics. Through the analysis of the first natural frequency, the study highlights the influence of the flow velocity and the clip stiffness, while the comparisons with metallic pipes emphasize the role of FGm composition. The examination of the forced response curves reveals saddle-node bifurcations and their dependence on parameters such as the detuning parameter and the power-law index, offering valuable insights into the system's nonlinear resonant behavior. Furthermore, the frequency-response curves illustrate the hardening nonlinearities influenced by factors such as the porosity and the clip stiffness, revealing nuanced effects on the system response and resonance characteristics. This comprehensive analysis enhances the understanding of nonlinear behaviors in FGm porous pipes with a retaining clip, providing key insights for practical engineering applications in system design and optimization.

关键词： Galerkin methods

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Parasites of the Nile rat in rural and urban regions of Sudan

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Integrative Zoology 2009年第2期4卷 179-187页

作者： Dina m.FAGIR el-Amin el-RAYAH Department of Zoology University of KhartoumKhartoumSudan

In this investigation on endoparasites(helminths)and ectoparasites of the Nile rat(Arvicanthis niloticus Desmarest,1822),a total of 220 Nile rats were trapped from different regions of Sudan during the period January 2003–January *** of different tissues,identification of parasites,effect of these parasites on the organs,the preva-lence and intensity of infestation of the parasites and their relation to the habitat of the host,and sex-related infestations were *** showed that the variation among helminth species was wide,especially in those that are transferred by *** protozoan parasites or distortion in the infected tissues were *** examination for Toxoplasma gondii was carried *** species of cestodes(Hymenolepis nana,Hymenolepis diminuta),two genera(Raillietina sp.I,Raillietina ***)and one unidentified Hymenolepididae were *** most prevalent species of cestodes was Raillietina *** for nematodes only one species and one genus were recovered(monanema nilotica and Streptopharagus sp.).Investigation of skin revealed that 83.8%of rats were infested with one or more of ectoparasites;namely,insects and *** survey also revealed that fleas and lice were the most common ectoparasites that infested the Nile *** rodents,particularly those living in close association with man,play a significant role in human health,welfare and *** has to be stressed that their arthropod ectoparasites are important vectors of pathogenic microorganisms and they can also be important reservoirs for parasitic zoonoses,like trichinellosis and *** doubt,the increase in rodent populations could be followed by an increase in zoonotic diseases(Stojcevic et al.2004,Durden et al.2000).Rats and mice(commensal and wild)play an important role in public health,being carriers or reservoirs for infectious diseases that can be transmitted to humans(zoonoses).Xenopsylla cheopis is the most important vector

关键词： Arvicanthis fleas lice mites Nile rat Sudan ticks.

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electrical properties of ^(70)Ge:Ga near the metal–insulator transition

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Journal of Semiconductors 2015年第6期36卷 1-5页

作者： m Errai A el kaaouachi H el idrissi Laboratoire mSTI Ecole Supérieure de tecchnologie d'Agadir B.P: 33/S University Ibn ZohrFaculty of Sciences AgadirMorocco Laboratoire electronique électrotechnique Automatique et Traitement de l'Information Département Génie Electrique Faculté des Sciences et Techniques de Mohammedia Université Hassan II Mohammedia CasablancaBP 146 Quartier YasminaMohammedia

The results of the metal-insulator transition （mIT） induced by impurity concentration are presented in the case of metallic and insulating samples 70Ge：Ga p-type. The eight samples studied have Ga concentrations N ranging from 1.848 × 1017 to 1.912 × 10^17 cm-3. The conductivity measurements were carried out at low temperature in the range 1 to 0.019 K. We provide physical explanations to explain the behaviors of the temperature dependence of the electrical conductivity in both sides of the mIT. The data are for a 70Ge：Ga sample prepared and reported by Itoh et aL in Ref. [Itoh K m, Watanabe m, Ootuka Y, et al. J Phys Soc Jpn, 2004, 73（1）： 173].

关键词： 70Ge: Ga semiconductor low temperature impurity concentration metal-insulator variable rangehopping conductivity transport properties

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Long-term changes in sea surface temperature(SST)within the southern Levantine Basin

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Acta Oceanologica Sinica 2021年第3期40卷 27-33页

作者： Tarek m.el-Geziry Laboratory of Physical Oceanography Division of Marine EnvironmentNational Institute of Oceanography and Fisheries(NIOF)Alexandria21556Egypt

Knowledge of sea surface temperature(SST)behaviour is vital for long-term climate *** study highlights essential outcomes about the distinguishable and unsurprising warming of the SST along the southern border of the Levantine *** analysis is based on monthly SST data for the period *** southern Levantine Basin has undergone SST increase,during the last 71 *** this study,a consistent warming trend has been found for the analysed SST data series,with a rate of 0.04℃/a,i.e.,0.4℃/(10 a).From 1975 to 1991 the mean annual SST was 17.1℃,and this increased to be 19.2℃,over the period *** revealed two opposite trends of variability:a decreasing trend(−0.06℃/a)over the period 1975-1991,and an increasing trend(0.2℃/a)from 2002 to *** the period 1948-2018,positive mean annual SST anomalies had an average of 1.8℃,and negative anomalies had an average of−1.1℃.The lowest SST total increase was found from January to April,with values about 0.03℃,while the highest warming appeared from June to *** driving mechanisms behind the SST changes need to be more investigated,to understand the future trends and impacts of climate change in the Levantine Basin.

关键词： mediterranean Sea Levantine Basin sea surface temperature anomaly trends warming

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Variable range hopping conduction in n-CdSe samples at very low temperature

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Journal of Semiconductors 2015年第12期36卷 14-17页

作者： m Errai A el Kaaouachi H el Idrissi Physics Department Ibn Zohr University Faculty of Sciences Laboratoire electronique électrotechnique Automatique et Traitement de l'Information Département Génie ElectriqueFaculté des Sciences et Techniques de Mohammedia Université Hassan Ⅱ Mohammedia Casablanca

We reanalyzed experimental data already published in Friedman J R, Zhang Y, Dai P, et al. Phys Rev B, 1996, 53（15）： 9528. Variable range hopping （VRH） conduction in the insulating three-dimensional n-CdSe samples has been studied over the entire temperature range from 0.03 to 1 K. In the absence of a magnetic field, the low temperature conductivity a of the three samples （A, B and C） obeys the mott VRH conduction with an appropriate temperature dependence in the prefactor （a = σ0 exp [- （T0/T）]^p with p ≈ 0.25）. This behavior can be explained by a VRH model where the transport occurs by hopping between localized states in the vicinity of the Fermi level, EF, without creation of the Coulomb gap （CG）. On the contrary, no Efros-Shklovskii VRH is observed, suggesting that the density is constant in the vicinity of the EF.

关键词： n-CdSe samples low temperature variable range hopping density of state

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Rock slope stability evaluation using kinematic and kinetic methods along the Kamyaran-marivan road,west of Iran

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Journal of mountain Science 2021年第3期18卷 779-793页

作者： mohsen SHARIATI Davood FEREIDOONI School of Earth Sciences Damghan UniversityDamghan 9823Iran

Interest in rock slope stability in mountainous regions has increased greatly in recent *** issue has become a topic of major interest for geoscientists and engineering professionals,as well as for private citizens and local administrators,in many parts of the *** paper evaluates the stability of seven rock slopes along the Kamyaranmarivan tourist road,Kurdistan province,Iran,using various *** two main reasons for performing this research were to determine whether different methods of stability analysis provide the same results,and to determine how different factors such as the presence of water,tension cracks,and seismic forces affect the stability of these rock ***,field investigations were performed to obtain the engineering characteristics of the rock masses,discontinuities,and intact rocks of the ***,laboratory tests were carried out on rock samples obtained from the slopes,to determine the engineering properties of the intact *** for each rock slope,the contour diagram of discontinuities and slope face was drawn in the Dips v.5.1 software environment,and the failure mechanism was determined based on the kinematic or stereographic ***,the factors of safety of the rock slopes were calculated using the limit equilibrium method,based on the failure mechanisms resulting from the kinematic *** accuracy of the results obtained by these two methods was investigated using SWedge v.4.0 *** results indicated that four rock slopes have a potential for plane,wedge,and toppling failure,and three others are ***,it was found that the stability of the studied rock slopes decreases greatly in the presence of water,tension cracks,and seismic forces.

关键词： Kamyaran-marivan Road Rock slope Rock mass Discontinuity Stability analysis

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Thiolsulfonate functionalized polystyrene resin:Preparation and application in the isolation and identification of electrophilic mutagens

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Journal of Environmental Sciences 2007年第12期19卷 1520-1527页

作者： Wu el Robert m. Carlson Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Department of Chemistry University of Minnesota-Duluth Duluth MN 55812 USA

A new approach for isolation and identification of elecrtophilic mutagens from complex matrix was developed. Thiosulforfic anion was immobilized onto polystyrene beads and used as separation media. Potassium polystyryl-thiosulfonate, prepared from polystyryl- sulfonyl chloride and KHS, was observed to selectively react with model electrophilic mutagens such as alkyl halides, ct-chloroketones and α-chloroesters to produce polystyryl-thiosulfonlc esters. After separation from other nonreactive organic compounds, the beads then reacted with ethanethiol to produce unsymmetrical ethyl disulfides which are easily detected by GC/mS. For one mutagenic compound, only one unsymmetrical disulfide was found to contain its structure part. Thus, the structure of the parent mutagens could be deduced from that of the unsymmetrical disulfides. The degree of functionalization of the potassium polystyryl-thiosulfonate resin was 1.11 mmol/g. Its reactivity was discussed and its recycling method was reported here.

关键词： functionalized polystyrene potassium polystyryl-thiosulfonate unsymmetrical ethyl disulfides electrophilic mutagens

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