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Towards the integration of nanoemitters by direct laser writing on optical glass waveguides

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Photonics Research 2020年第9期8卷 1541-1550页

作者： XIAOLUN XU AURÉLIE BROUSSIER TIZIANA RITACCO MACKRINE NAHRA FABIEN GEOFFRAY ALI ISSA safi jradi RENAUD BACHELOT CHRISTOPHE COUTEAU AND SYLVAIN BLAIZE Light nanomaterialsnanotechnologies(L2n)ERL 7004CNRS.University of Technology of Troyes12 rue Marie Curie10004 Troyes CedexFrance Teem Photonics 61 Chemin du Vieux Chêne38246 MeylanFrance Key Laboratory of Advanced Display and System Application Ministry of EducationSchool of Mechatronic Engineering and AutomationShanghai UniversityShanghai 200072China Sino-European School of Technology Shanghai UniversityShanghai 200044China

A major challenge towards nanophotonics is the integration of nanoemitters on optical *** the optical properties of nanoemitters with the benefits of integration and scalability of integrated optics is still a major issue to *** this work,we demonstrate the integration of nanoemitters positioned in a controlled manner onto a substrate and onto an optical ion-exchanged glass waveguide via direct laser writing based on twophoton *** nanoemitters are colloidal CdSe/ZnS quantum dots(QDs)embedded in polymeric *** varying the laser parameters during the patterning process,we make size-controlled QDpolymer nanostructures that were systematically characterized using optical and structural *** as small as 17 nm in height were *** well-controlled QD-polymer nanostructure systems were then successfully integrated onto a new photonic platform for nanophotonics made of an ion-exchanged *** show that our QDs maintain their light emitting quality after integration as verified by photoluminescence(PL)***,QD emission coupled to our waveguides is detected through a home-built fiber-edge coupling PL measurement *** results show the potential for future integration of nanoemitters onto complex photonic chips.

关键词： emitter optical waveguides

Frequency-dependent viscoelasticity effects on the wave attenuation performance of multi-layered periodic foundations

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 407-424页

作者： M.safi M.VAKILIFARD M.J.MAHMOODI Faculty of Civil Water&Environmental EngineeringShahid Beheshti UniversityTehran ***Iran Faculty of Mechanical and Energy Engineering Shahid Beheshti UniversityTehran ***Iran

In this paper,layered periodic foundations(LPFs)are numerically examined for their responses to longitudinal and transverse modes in the time and frequency *** different unit-cells,i.e.,2-layer,4-layer,and 6-layer unit-cells,comprising concrete/rubber,concrete/rubber/steel/rubber,and concrete/rubber/steel/rubber/lead/rubber materials,respectively,are taken into ***,the viscoelasticity behavior of the rubber is modeled with two factors,i.e.,a frequency-independent(FI)loss factor and a linear frequency-dependent(FD)loss *** the extraction of the complex dispersion curves and the identification of the band gaps(BGs),the simulations of wave transmission in the time and frequency domains are performed using the COMSOL *** parametric studies evaluate the effects of the rubber viscoelasticity models on the dispersion curves and the wave transmission for the longitudinal and transverse *** results show that considering the rubber viscoelasticity enhances the wave attenuation ***,the transverse-mode damping is more sensitive to the viscoelasticity model than its longitudinal *** 6-layer unit-cell LPF exhibits the lowest BG,ranging from 4.8 Hz to 6.5 Hz.

关键词： layered metamaterial periodic foundation complex dispersion curve wave transmission diagram

Two-photon photopolymerization directly initiated by spiropyran photochromic molecules

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Light(Advanced Manufacturing) 2023年第1期4卷 12-22页

作者： Dandan Ge Jean Aubard Erell Bodinier safi jradi Stéphanie Lau-Truong Nordin Felidj Renaud Bachelot Anne-Laure Baudrion Light nanomaterialsnanotechnologies(L2n)LaboratoryCNRS EMR7004Universitéde Technologie de Troyes12 rue Marie Curie10004 Troyes CedexFrance UniversitéParis Cité CNRSITODYSF-75013 ParisFrance

Here,we report the ability of spiropyrans to initiate two-photon polymerization(TPP)for the first time in the *** comparison and synergies between the spiropyran photochromic molecule of interest,namely 6-nitro-BIPS,and well-known photoinitiators of radical photopolymerization have been *** spiropyran(SPy)molecule can initiate TPP in the presence of trifunctional acrylic monomers and create true 3D *** comparison with Irgacure 819,a well-known Type-I photoinitiator,shows that SPy has a comparable capability for *** addition,the combination of SPy with methyl diethanolamine increased the reactivity of both one-and two-photon *** the last section,we discuss which SPy isomer is the active photochromic species capable of generating radicals for initiating two-photon polymerization.

关键词： Spiropyran Direct laser writing Two-photon-photopolymerization Photochromism

Governance of noncommunicable diseases in Afghanistan

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Chronic Diseases and Translational Medicine 2024年第3期10卷 238-246页

作者： Narges Neyazi Ali M.Mosadeghrad Maryam Tajvar Najibullah safi International Campus School of Public HealthTehran University of Medical SciencesTehranIran Department of Health System Development World Health OrganizationAfghanistan Department of Health Management Policy and EconomicsSchool of Public HealthTehran University of Medical SciencesTehranIran

Background Noncommunicable diseases(NCDs)are the main reasons of mortality *** of every two person is dying due to NCDs in *** policy actors,mainly the World Health Organization(WHO),published several reports and declarations on controlling and preventing *** study aimed to provide a situation for governance of NCDs in Afghanistan and proper solutions for identified *** We conducted qualitative research utilizing interpretive phenomenology.A self-developed questionnaire was developed to conduct the semi-structured interviews with 39 experts from *** results were analyzed using a deductive framework *** building block framework of health system developed by the WHO was used as predefined framework for this *** The governance building block of health system consists of five subthemes including policy making,planning,organizing,stewardship,and *** identified main strengths,weaknesses,opportunities,and challenges for these *** experts also provided key recommendations to address the *** Management of NCDs is a neglected part of the health system in *** evidence-based policy making with technical and indigenous planning,establishing responsive units with adequate financial and human resources within different ministries to address“health in all policies”concept,passing and implementing national laws and regulations to support national strategies for prevention and control of NCDs,and establishing decentralized monitoring systems to control the implementation of these strategies are the main recommendations of this *** government and international policy actors should invest and support the development of a multisectoral coordination system at national level for Afghanistan.

关键词： governance health in all policies health system multisectoral coordination noncommunicable diseases

Assessing Moroccan physician knowledge and practices regarding maternal obesity's impact on childhood obesity:Implications for prevention and intervention

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World Journal of Clinical Pediatrics 2024年第2期13卷 146-160页

作者： Imane Douiyeh Jihane Khamlich Naima Nabih Asmae Saih Ilham Boumendil Anas Regragui Anass Kettani Amal safi Laboratory Biochemistry Environment and Agri-food Department of BiologyFaculty of Science and Technics MohammediaHassanⅡUniversity CasablancaMohammedia 28806Morocco Department of Biology Faculty of Sciences Ben M’Sik HassanⅡUniversity of CasablancaCasablanca 20000Morocco Department of Medical ACHAS Association of the Doctors Ain Chock Casablanca MoroccoCasablanca 20400Morocco Department of Medical HassanⅡUniversityCasablanca 20400Morocco

BACKGROUND Childhood obesity is a growing global concern with far-reaching health *** study focuses on evaluating the knowledge and practices of physicians in Morocco regarding the link between maternal obesity and childhood *** the increasing prevalence of childhood obesity worldwide,this issue remains inadequately addressed in the Moroccan *** To assess the awareness and practices of physicians in Morocco concerning the connection between maternal obesity and childhood *** The research encompasses a comprehensive survey of practicing physicians,revealing significant gaps in awareness and practices related to maternal *** Notably,a significant portion of doctors do not provide adequate guidance to overweight pregnant women,highlighting the urgency for targeted educational *** In conclusion,this research illuminates critical areas for improvement in tackling childhood obesity in *** addressing these gaps,fostering awareness,and enhancing medical practices,the healthcare system can contribute significantly to preventing childhood obesity and improving the overall health of future generations.

关键词： Childhood obesity Maternal obesity Management Prevention Screening

Generation of endurance time excitation functions using spectral representation method

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Earthquake Engineering and Engineering Vibration 2023年第2期22卷 441-452页

作者： Parsa Parvanehro Mohammad safi Faculty of Civil Water and Environmental EngineeringShahid Beheshti UniversityTehran ***Iran

In this study,application of the spectral representation method for generation of endurance time excitation functions is *** this method,the intensifying acceleration time series is generated so that its acceleration response spectrum in any desired time duration is compatible with a time-scaled predefined acceleration response *** this purpose,simulated stationary acceleration time series is multiplied by the time dependent linear modulation function,then using a simple iterative scheme,it is forced to match a target acceleration response *** is shown that the generated samples have excellent conformity in low frequency,which is useful for nonlinear endurance time *** the second part of this study,it is shown that this procedure can be extended to generate a set of spatially correlated endurance time excitation *** makes it possible to assess the performance of long structures under multi-support seismic excitation using endurance time analysis.

关键词： endurance time analysis endurance time excitation functions spatial variation of seismic ground motions multi-support excitation spectral representation method

Cooperative distributed state estimation:resilient topologies against smart spoofers

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Control Theory and Technology 2022年第4期20卷 488-503页

作者： Mostafa safi Amirkabir University of Technology HafezTehran 424Iran

A network of observers is considered,where through asynchronous(with bounded delay)communications,they cooperatively estimate the states of a linear time-invariant(LTI)*** such a setting,a new type of adversary might affect the observation process by impersonating the identity of the regular node,which is a violation of communication *** adversaries also inherit the capabilities of Byzantine nodes,making them more powerful threats called smart *** show how asynchronous networks are vulnerable to smart spoofing *** the estimation scheme considered in this paper,information flows from the sets of source nodes,which can detect a portion of the state variables each,to the other follower *** regular nodes,to avoid being misguided by the threats,distributively filter the extreme values received from the nodes in their *** conditions based on strong robustness are proposed to guarantee the *** simulation scenarios are provided to verify the results.

关键词： Cyber-physical systems Smart spoofing Distributed resilient algorithm Secure observers

SRResNet Performance Enhancement Using Patch Inputs and Partial Convolution-Based Padding

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Computers, Materials & Continua 2023年第2期74卷 2999-3014页

作者： safi Ullah Seong-Ho Song Division of Software Hallym University1 Hallymdaehak-gilChuncheonGangwon-doKorea Department of Information Technology University of GujratJalalpur Jattan RoadGujratPakistan

Due to highly underdetermined nature of Single Image Super-Resolution(SISR)problem,deep learning neural networks are required to be more deeper to solve the problem *** of deep neural networks successful in the Super-Resolution(SR)problem is ResNet which can render the capability of deeper networks with the help of skip ***,zero padding(ZP)scheme in the network restricts benefits of skip connections in SRResNet and its performance as the ratio of the number of pure input data to that of zero padded data *** this *** consider the ResNet with Partial Convolution based Padding(PCP)instead of ZP to solve SR *** training of deep neural networks using patch images is advantageous in many aspects such as the number of training image data and network complexities,patch image based SR performance is compared with single full image based *** experimental results show that patch based SRResNet SR results are better than single full image based ones and the performance of deep SRResNet with PCP is better than the one with ZP.

关键词： Single image super-resolution SRResNet patch inputs zero padding partial convolution based padding

Neurocognitive Profile of People Living with Human Immunodeficiency Virus Initiating Treatment in Kinshasa in the Dolutegravir Era, Democratic Republic of Congo

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Neuroscience & Medicine 2024年第1期15卷 1-22页

作者： Candide About Kabamba Berry Ikolango Bongenya Jocelyn Ewuti Nonga Lambert Omombo Losenga Noëlla Maketi Dikati Thérèse Kasaka Ntumba Grace Ipaya Booto Rosalie Djamba Dembo Stéphanie Mauwa Selenge Benoit Obel Kabengele Guy Makila Mabe Bumoko Marie-Thérèse Ayane safi Sombo Erick Ntambwe Kamangu Department of Neurology Faculty of Medicine University of Kinshasa Kinshasa Democratic Republic of Congo Faculty of Medicine Bel Campus Technological University Kinshasa Democratic Republic of Congo “Focus HIV/AIDS” Research Group Kinshasa Democratic Republic of Congo Department of Internal Medicine University Clinic of Kinshasa Kinshasa Democratic Republic of Congo Molecular Biochemistry Department Department of Basic Sciences Faculty of Medicine University of Kinshasa Kinshasa Democratic Republic of Congo

Context: Antiretroviral therapies improve the prognosis of NeuroAIDS contrasting with a high frequency of Minor Neurocognitive Disorders (MND) even in aviremic subjects. Objective: The objective of this study is to present the neurological and cognitive profile of People Living with HIV (PLHIV) initiating antiretroviral treatment in Kinshasa in the era of Dolutegravir (DTG). Methods: This is a multicenter, cross-sectional study with a descriptive aim carried out in 16 HIV Outpatient Treatment Centers (OTC) in Kinshasa from October 4, 2021 to February 15, 2022. The International HIV Dementia Scale (IHDS) correlated with the Activities of Daily Living (IADL) scale facilitated the categorization of NeuroCognitive Disorders (NCD) of PLHIV evaluated after carrying out a summary neurological examination. Results: Of the 96 patients recruited, 56.3% were women with a sex ratio of 0.68. The average age was 40.1 ± 12.1 years. The secondary education level was the majority at 64.6%. Malaria (44.8%) and tuberculosis (32.3%) were more common as opportunistic infections. They were alcoholics in (30.2%). Their history was heart disease (15.6%), high blood pressure (18.8%);drug abuse (10.4%). The IHDS score was light in 55.2% of cases. The correlation between IHDS/IADL watches asymptomatic neurocognitive impairments (ANI) in 77.1%, almost all of subjects are found with normal overall functioning (94.8%) and a disturbed neurological examination in 53.1% of cases with a predominance of motor impairments in 79.1%. Conclusion: In view of these results, early and systematic screening of NCD and associated factors remains necessary in our context. .

关键词： IHDS Dolutegravir Initiation Kinshasa Neurological Profile PLHIV