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Oxygenation strategy during acute respiratory failure in immunocompromised patients

Journal of Intensive Medicine 2021年第2期1卷 81-89页

作者： Virginie Lemiale Elise Yvin Achille Kouatchet djamel mokart Alexandre Demoule Guillaume Dumas Grrr-OH Research Group Service de Médecine Intensive et Réanimation APHP Hopital Saint Louis1 Avenue Claude VellefauxParis 75010France Service de Réanimation Médicale et Médecine Hyperbare Angers 49100France Institut Paoli-Calmettes Réanimation Medico-ChirurgicaleMarseille 13009France AP-HP Groupe Hospitalier Universitaire APHP-Sorbonne Universitésite Pitié-SalpêtrièreService de Médecine Intensive et Réanimation(Département R3S)and Sorbonne UniversitéINSERMUMRS1158 Neurophysiologie Respiratoire Expérimentale et CliniqueParis 75013France

Acute respiratory failure(ARF)in immunocompromised patients remains challenging to treat.A large number of case require admission to intensive care unit(ICU)where mortality remains high.Oxygenation without intubation is important in this setting.This review summarizes recent studies assessing oxygenation devices for immunocompromised patients.Previous studies showed that non-invasive ventilation(NIV)has been associated with lower intubation and mortality rates.Indeed,in recent years,the outcomes of immunocompromised patients admitted to the ICU have improved.In the most recent randomized controlled trials,including immunocompromised patients admitted to the ICU with ARF,neither NIV nor high-flow nasal oxygen(HFNO)could reduce the mortality rate.In this setting,other strategies need to be tested to decrease the mortality rate.Early admission strategy and avoiding late failure of oxygenation strategy have been assessed in retrospective studies.However,objective criteria are still lacking to clearly discriminate time to admission or time to intubation.Also,diagnosis strategy may have an impact on intubation or mortality rates.On the other hand,lack of diagnosis has been associated with a higher mortality rate.In conclusion,improving outcomes in immunocompromised patients with ARF may include strategies other than the oxygenation strategy alone.This review discusses other unresolved questions to decrease mortality after ICU admission in such patients.

关键词： Outcome Acute respiratory failure Invasive mechanical ventilation

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3D finite element analysis of a two-surface wear model in fretting tests

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摩擦:英文版 2023年第12期11卷 2278-2296页

作者： Stéphanie BASSEVILLE djamel MISSOUM-BENZIANE Georges CAILLETAUD Universitéde Versailles Saint-Quentin Versailles 78000France MINES ParisTech PSL Research UniversityMATCentre des MatériauxCNRS UMR 7633Evry Cedex BP 8791003France

This article aims at developing a computationally efficient framework to simulate the erosion of two contact surfaces in three-dimensional(3D),depending on the body resistance.The framework involves finite element(FE)resolution of a fretting problem,wear computation via a non-local criterion including a wear distribution parameter(WDP),as well as updating of the geometry and automatic remeshing.Its originality is based on the capability to capture the damage on each surface and obtain local and global results for a quantitative and qualitative analysis.Numerical simulations are carried out for two 3D contact specimens with different values of WDP.The results highlight the importance of correctly modelling wear:One-surface wear model is sufficient from a global point of view(wear volume),or whenever the wear resistance for a body is much higher than that of another one,whereas a 3D two-surface wear model is essential to capturing local effects(contact pressure,wear footprint,etc.)related to the difference in wear resistance of the bodies.

关键词： three-dimensional(3D)finite element(FE)simulations fretting two-surface wear model titanium alloys

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Sizing,optimization,control and energy management of hybrid renewable energy system-A review

Energy and Built Environment

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Energy and Built Environment 2022年第4期3卷 399-411页

作者： Chouaib Ammari djamel Belatrache Batoul Touhami Salim Makhloufi LEESI Laboratory Faculty of Sciences and TechnologyUniversity of Adrar01000Algeria Laboratory of Sustainable Development and Computing(LDDI) University of Adrar01000 AdrarAlgeria Department natural sciences and life Faculty of Sciences and TechnologyUniversity of Adrar01000Algeria

To meet fast growing in energy demand,all energy sources have to be exploited.Renewables energies are unlim-ited and clean but the most problem with them is their intermittent aspect.To overcome this problem a mixture of several energy sources is made to obtain what called hybrid renewable energy system.This paper aims at pre-senting and analyzing a deep literature review of the recent paper published in hybrid renewable energy field.This review focuses on four essential categories of hybrid renewable energy system which is sizing(using soft-ware or using traditional methods),optimization(classical,artificial and hybrid methods),control(centralized,distributed and hybrid control)and energy management(technical objective,economic objective and techno-economic objective).Furthermore,this paper compares between different methods used in each category.

关键词： Renewable energy Sizing Optimization Control Energy management

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Nanoscaled MnSnO_(2)@CsPbBr_(3) quantum dots heterostructure photocatalyst as efficient organic pollutants degradation by peroxymonosulfate;DFT calculation

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Journal of Materials Science & Technology 2023年第22期153卷 41-55页

作者： Raqiqa Tur Rasool Ghulam Abbas Ashraf Mohsin Pasha Muhammad Farooq Saleem djamel Ghernaout Mohammed M.Fadhali Hai Guo Department of Physics Zhejiang Normal UniversityJinhuaZhejiang 321004China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China GBA branch of Aerospace Information Research Institute Chinese Academy of SciencesGuangzhou 510700China Chemical Engineering Department College of EngineeringUniversity of Ha’ilPO Box 2440Ha’il 81441Saudi Arabia Chemical Engineering Department Faculty of EngineeringUniversity of BlidaPO Box 270Blida 09000Algeria Department of Physics Faculty of ScienceJazan UniversityJazan 45142Saudi Arabia Department of Physics Faculty of ScienceIbb University 70270Yemen

In this work,we developed a promising photocatalyst in CsPbBr_(3) quantum dots(QDs)because of their exceptional optoelectronic characteristics.However,QDs applications in the field of photocatalysis were mainly hampered by their poor stability and insufficient charge transfer efficiency.Herein,a novel and efficient MnSnO_(2)@CsPbBr_(3)(MSO@QDs)nanocomposite was first time effectively designed and synthe-sized by a wet impregnation method for peroxymonosulfate(PMS)activation under the light.The newly generated interface phase of QDs between MnSnO_(2)(MSO)showed great potential to improve light ab-sorption,leading to effective separation and transfer of photoelectron-hole pairs.This novel nanocompos-ite MSO@QDs showed great Flurbiprofen(FL)removal efficiency under the PMS/Light system.It should be noted that this nanocomposite removed 85.74%of FL in just 70 min,which was almost 1.11 and 2.51 times greater than using pure QDs and pure MSO,respectively.Based on thorough measurements of structural analysis,Brunauer-Emmett-Teller(BET),UV-vis spectra,electrochemical impedance spec-troscopy(EIS),transient photocurrent response,and a potential mechanism for organic pollutants degra-dation over MSO@QDs nanocomposite was envisioned.The principal reactive species of photoinduced holes(h^(+)),i.e.O_(2)^(˙−),SO_(4)^(˙−),^(˙)OH,and non-radical(^(1)O_(2))were characterized via scavengers’technique and electron paramagnetic resonance(EPR)measurements.The highest photocatalytic performance for the re-moval of MO,MB,and IBU was demonstrated by MSO@QDs nanocomposite/PMS,revealing their excellent ability to remove organic pollutants through photo-oxidation.Furthermore,the developed nanocompos-ite exhibited good stability in an aqueous medium.According to computational investigation using the density functional theory(DFT)method,the site’s higher Fukui index f^(0) value corresponds to a greater propensity to be attacked by reactive species.This work offers a fresh perspective on developing further high-efficiency,low-cost photocatalys

关键词： CsPbBr_(3)QDs MnSnO_(2) Peroxymonosulfate Nanocomposite Photocatalyst Organic pollutants DFT

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Electrochemically and Ultrasonically-Enhanced Coagulation for Algae Removal

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Green and Sustainable Chemistry 2023年第2期13卷 73-109页

作者： djamel Ghernaout Noureddine Elboughdiri Chemical Engineering Department College of Engineering University of Ha’il Ha’il Saudi Arabia Chemical Engineering Department Faculty of Engineering University of Blida Blida Algeria Chemical Engineering Process Department National School of Engineers Zrig Gabes University of Gabes Gabes Tunisia

At the global level, the augmenting presence of harmful algae blooms constitutes important dares to water treatment plants (WTPs). In WTPs, coagulation remains the primary process of the applied procedure to treat algae-contaminated water. Such a chemical process influences the following techniques;thus, regulating coagulation parameters to eliminate algae at the maximum degree without provoking cell deterioration is more than crucial. This work aims to review coagulation-founded methods for algae elimination. First, investigations concentrating on algae elimination using the chemical process are discussed. The introduction presents the widespread algae encountered in the water treatment field. Then, habitually utilized experimental techniques and emerging methods in coagulation investigations are summarized with typical findings. Next, the newest expansions in improved algae elimination, launched by electrochemically and ultrasonically-enhanced coagulation, are discussed. Workable thoughts for applying coagulation to eliminate algae in WTPs are also debated. The paper finishes by defining restrictions and dares related to the present literature and suggesting trends for subsequent studies. The charge neutralization mechanism efficiently removes solubilized microcystins (MCs), and enhanced coagulation configuration is also found to be more efficient for their removal. However, considerations should be taken to avert that the acid introduction has no unwanted effect in killing algae treatment to avoid the solubilized MCs level elevation. If such techniques are well-optimized and controlled, both algae and solubilized MCs could be efficaciously removed by ultrasound-enhanced coagulation and electrocoagulation/electrooxidation.

关键词： Harmful Algal Blooms (HABs) Electrocoagulation (EC) Electrooxidation (EO) Ultrasound (US) Machine Learning (ML) Reactive Oxygen Species (ROSs)

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Fault tolerant control based on neural network interval type-2 fuzzy sliding mode controller for octorotor UAV

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Frontiers of Computer Science 2016年第4期10卷 657-672页

作者： Samir ZEGHLACHE djamel SAIGAA Kamel KARA LASS Laboratory Departemenl: of Electronics Faculty of Technology University of MSila Msila 28000 Algeria SET Laboratory Departement of Electronics Faculty of Technology University of Blida Blida 09000 Algeria

In this paper, a robust controller for a six degrees of freedom （6 DOF） octorotor helicopter control is proposed in presence of actuator and sensor faults. Neural networks （NN）, interval type-2 fuzzy logic control （IT2FLC） approach and sliding mode control （SMC） technique are used to design a controller, named fault tolerant neural network interval type-2 fuzzy sliding mode controll,~r （FTNNIT2FSMC）, for each subsystem of the octorotor helicopter. The proposed control scheme allows avoiding difficult modeling, attenuating the chattering effect of the SMC, reducing the number of rules for the fuzzy controller, and guaranteeing the stability and the robustness of the system. The simulation results show that the FTNNIT2FSMC can greatly alleviate the chattering effect, tracking well in presence of actuator and sensor faults.

关键词： neural networks type-2 fuzzy logic sliding mode controller fault tolerant control octorotor helicopter

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Are diurnal time-budgets and activity patterns density-dependent in the Shelduck (Tadorna tadorna) wintering in Algeria? An analysis across multiple temporal scales

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Avian Research 2019年第2期10卷 171-185页

作者： djamel Bensizerara Haroun Chenchouni Department of Biology Faculty of Nature and Life SciencesUniversity of Abbes Laghrour40000 KhenchelaAlgeria Department of Natural and Life Sciences Faculty of Exact Sciences and Natural and Life SciencesUniversity of Tebessa12002 TebessaAlgeria Laboratory of Natural Resources and Management of Sensitive Environments 'RNAMS’ University of Oum-El-Bouaghi04000 Oum-El-BouaghiAlgeria

Background: The Shelduck (Tadorna tadorna) is a characteristic waterbird species of inland wetlands in northeastern Algeria. Its wintering behavior in relation to changes of local abundances and foraging group density is poorly known. Objectives: This study aims at monitoring patterns of diurnal activities and the variation of behavioral time-budgets in relation to numbers of wintering Shelducks. We investigate temporal variations of diurnal activities across multipletime scales and consider their interrelationships. Methods: Assessments of local population abundance were weekly surveyed during two wintering seasons (2010– 2012), whereas diurnal activities (feeding, sleeping, swimming, preening, loafing, flying, courtship, and antagonism) were studied three times a month during seven hours (08:00–16:00) using the Scan method. Time budget variations of each behavioral activity were tested using nested ANOVAs following multiple time scales. Generalized linear mixedeffects models (GLMM) tested whether variations in diurnal activities were density-dependent. Results: During the wintering season, Shelduck’s numbers followed a bell-shaped trend, which indicated that the species was typically a wintering migrant in Sabkha Djendli. The first individuals arrived onsite in October–November then numbers reached a peak in January (up to 2400 individuals in 2012) with steady density during December–February, afterward individuals left the site progressively until late April when the site is deserted. During both wintering seasons, diurnal activities were dominated by feeding (60%), followed by sleeping (12%) then swimming and preening with 9% and 8%, respectively. The rest of the activities (loafing, flying, courtship and antagonistic behaviors) had low proportions of time budget. ANOVAs showed that activity time budgets varied significantly following multiple time scales (year, season, month, day, semi-hour). Time budgets of diurnal activities during each wintering season were significantly interrelated. Correlations pattern

关键词： Anatidae Multi-temporal scales North African wetlands Time budget Waterbird census

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Friction welding influence on microstructure,microhardness and hardness behavior of CrNiMo steel(AISI 316)

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China Welding 2023年第3期32卷 21-27页

作者： Ammar Jabbar Hassan Billel Cheniti Brahim Belkessa Taoufik Boukharouba djamel Miroud Nacer-Eddine Titouche Advanced Mechanics Laboratory(LMA) Houari Boumediene University of Sciences and TechnologyEl Alia 16111Bab EzzouarAlgiersAlgeria Research Center in Industrial Technologies Algiers 16014Algeria Science and Engineering Materials Laboratory(LSGM) Houari Boumediene University of Sciences and TechnologyEl Alia 16111Bab EzzouarAlgiersAlgeria Birine Nuclear Research Center Ain OusseraDjelfa 17200Algeria

For joining high Cr,Ni and Mo austenitic stainless steel(AISI 316)by direct drive friction welding(DDFW),with friction weld-ing conditions:rotation speed of 3000 r/min,friction time of 10 s,friction pressure of 130 MPa,forge time of 5 s and forge pressure of 260 MPa.The results of microstructure showed that the temperature at the interface reached 819℃while forge applied between 357-237℃,which subdivided welded joint into four distinct regions of highly plastically deformed zone(HPDZ),thermo-mechanically affected zone(TMAZ),heat affected zone(HAZ)and the base metal,with grain size about 10µm,100µm,90µm and 30µm respectively.These re-gions were created due to dynamic recrystallization(DRX)at the interface and thermo-mechanical deformation with heat diffusion in the neighboring regions.Whereas,high level of microhardness about 300 HV0.1 and hardness roughly 240 Hv10 at the interface due to HPDZ creation while low level of 240 HV0.1 for microhardness and moderately of 205 HV10 for hardness in neighboring regions.

关键词： friction welding austenitic stainless steel microstructure microhardness hardness

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Enhanced absorption of solar cell made of photonic crystal by geometrical .design

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Frontiers of Optoelectronics 2016年第1期9卷 93-98页

作者： Asma OUANOUGHI Abdesselam HOCINI djamel KHEDROUCHE Laboratoire d'Analyse des Signaux et Systemes Department of Electronics University of Mohamed Boudiaf of M'sila BE 166 Route Ichebilia M'sila 28000 Algeri

In this paper, via numerical simulation we designed the geometry of solar cell made by onedimensional （1D） and two-dimensional （2D） photonic crystals with two kinds of materiel （silicon （Si） and hydrogenated amorphous silicon （a-Si：H）） in order to enhance its absorption. The absorption characteristics of light in the solar cell structures are simulated by using finite-difference time-domain （FDTD） method. The calculation results show that the enhancement of absorption in patterned structure is apparent comparing to the unpatterned one, which proves the ability of the structure to produce photonic crystal solar cell. We found solar cell geometries as a 2D photonic crystal enable to increase the absorption between 380 and 750 nm.

关键词： finite-difference time-domain two-dimensional （2D） photonic crystals solar cell

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Microstructure and Mechanical Behavior in Dissimilar SAF 2205/API X52 Welded Pipes

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Acta Metallurgica Sinica(English Letters) 2016年第7期29卷 674-682页

作者： Brahim Belkessa djamel Miroud Naima Ouali Billel Cheniti Research Center in Industrial Technologies CRTIP.O. Box 64 16014 Cheraga Algiers Algeria Laboratory of Sciences and Materials Engineering LSGMFGMGP University of Sciences and Technology Houari Boumediene BP 32 E1 Alia Bah Ezzouar 16111 AlgiersAlgeria

The welding of a duplex stainless steel SAF 2205 DSS （UNS 31803） and high strength low alloy steel API X52 by shielded metal arc welding process was conducted using two different filler metals, the duplex E2209 and austenitic E309 grade. The microstructures of the dissimilar metal joints have been investigated by optical microscopy, scanning electron microscopy, energy-dispersive spectroscopy （EDS） and X-ray diffraction. EDS analysis at the interface X52 weld metal showed an evident gradient variation of Cr and Ni between boundaries of fusion and type II, where the highest hardness value was recorded. Tensile strength and toughness values of the weld metal produced by E309 electrode are slightly higher than those of the weld metal produced by E2209 electrode. Potentiodynamic polarization tests of different regions of the welded joints evaluated in 3.5% NaC1 solution exhibit a high corrosion resistance of both weld metals.

关键词： Dissimilar metals welding 2205 duplex stainless steel API X52 HSLA steel Heat-affectedzone Mechanical properties

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