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Bending and Free Vibration Analysis of Porous-Functionally-Graded(PFG)Beams Resting on Elastic Foundations

Fluid Dynamics & Materials Processing 2023年第4期19卷 1043-1054页

作者： lazreg hadji Fabrice Bernard Nafissa Zouatnia Laboratory of Geomatics and Sustainable Development University of TiaretTiaret14000Algeria Department of Mechanical Engineering University of TiaretTiaret14000Algeria INSA Rennes Laboratory of Civil Engineering and Mechanical EngineeringRennes35043France Department of Civil Engineering University of TiaretTiaret14000Algeria

The bending and free vibration of porous functionally graded(PFG)beams resting on elastic foundations are *** material features of the PFG beam are assumed to vary continuously through the thickness according to the volume fraction of *** foundation medium is also considered to be linear,homogeneous,and isotropic,and modeled using the Winkler-Pasternak *** hyperbolic shear deformation theory is applied for the kinematic relations,and the equations of motion are obtained using the Hamilton’s *** analytical solution is presented accordingly,assuming that the PFG beam is simply *** with the open literature are implemented to verify the validity of such a *** effects of the elastic foundations,porosity volume percentage and span-to-depth ratio are finally discussed in detail.

关键词： Bending free vibration porosity functionally graded material winkler-pasternak elastic foundation

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Effect of Verticillium lecanfi on biological characteristics and life table of Serangium japonicum （Coleoptera： Coccinellidae）, a predator of whiteflies under laboratory conditions

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Insect Science 2008年第4期15卷 327-333页

作者： lazreg Fatiha Zhen Huang Shun-Xiang Ren Shaukat Ali Engineering Research Center of Biological Control Ministry of Education College of Natural Resource and Environment South China Agricultural University Guangzhou China

Effects of entomopathogenic fungus Verticillium lecanii on biological characteristics and life table of Serangiumjaponicum, a predator of whiteflies against five different conidial concentrations （1 × 10^4, 1 × 10^5, 1 × 10^6, 1 × 10^7, and 1 × 10^8 conidia/mL） were studied under laboratory conditions. The developmental periods for all immature stages （from eggs, 1 st, 2nd, 3rd, 4th instar nymph and pupae up to emergence） among the treatments were significantly different when compared to that of control, and the longest development period was observed as treated with 1 × 10^8 spore/mL. However, no significant difference on the percent survival of all immature stages was observed among the treatments and control. Also, there were no significantly different effects of V. lecanii on mean generation time, intrinsic rate, the finite rate of increase and longevity of S. japonicum among the treatments and control.

关键词： biological characteristics life table Serangiumjaponicum Verticillium lecanii

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Children Flat Foot and Lower Limb Rotational Profile: A Cross-Sectional Descriptive Study

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Open Journal of Orthopedics 2015年第10期5卷 326-335页

作者： Jemni Sonia lazreg Nadia Abid Manel Frioui Samia Ben Rejeb Mohamed Osman Walid Zaoui Afif Khachnaoui Faycel Department of Physical Therapy and Rehabilitation Sahloul Hospital Sousse Tunisia High School of Sciences and Technology of Health of Sousse Sousse Tunisia Community and Preventive Medicine Department Sahloul Hospital Sousse Tunisia Orthopedic Department Sahloul Hospital Sousse Tunisia

Flat foot in children is a common deformation, which appears during the first years of life. It requires a rigorous evaluation to rule out congenital or neurological abnormality. It is characterized by a decrease of the plantar concavity indeed collapse of the foot, often associated with other morphostatic deformations. The aim of this study is to find a correlation between the essential flat foot in children and lower limb disorders torsional. It is a cross-sectional descriptive study, recruiting 110 children (220 feet) aged between 3 and 6 years old. Each child was given an assessment of the morphology of the foot (Contact Index II…) and lower limb rotational profile (intoeing and femoral antétorsion and tibal torsion). Among 110 children, 21 (19.1%) have bilateral flat feet and 7 (6.4%) have unilateral flat feet, associated with an average value of Contact Index II equal to 0.921;the minimum value is 0.880 and the maximum value is 1.17. All children with flat feet have excessive femoral antétorsion;45 (92%) are associated with a hip intoeing and 38 (80%) present an insufficient external tibial torsion. The analysis of multiple regression shows a significantly elevated correlation among the flat foot and excessive internal rotation of the hip (F = 70.36, r = 0.77, P < 0.001), excessive femoral antetorsion (F = 54.78, r = 0.73, P < 0.001) and insufficient external tibial torsion (F = 7.79, r = 0.37, P < 0.001).

关键词： Children Essential Flat Foot Femoral Antétorsion Internal Rotation of the Hip Tibial Torsion

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Cost Effectiveness Analysis of Filgrastim versus Placebo in Post AIIogentic Bone Marrow Transplantation

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Journal of Pharmacy and Pharmacology 2016年第6期4卷 268-272页

作者： Maoudoud Ines Razgallah Khrouf Myriam Ben Abdejelil Nour Ghedira Hela Amel Lakhal Marsit Hanene Turki Manel Soussi Mohamed Ali lazreg Olfa Ladab Saloua Ben Othmane Tarek University of Monastir Faculty of Pharmacy-5000 Tunisia Centre National de Greffe de Moelle Osseuse-1006 Tunisia University of Tunis El Manar Faculty of Medicine of Tunis-1006 Tunisia

Filgrastim is used to accelerate hematopoietic recovery after ABMT （allogeneic bone marrow transplantation）. Its impact on the total cost of patient care remains to be explored. We therefore undertook a cost effectiveness analysis in the context of a randomized single blinded clinical trial of Filgrastim versus placebo in post ABMT. A primary endpoint, duration of myelosuppression, and three secondary end points （number of days of fever, length of hospital stay, survival at one hundred days） were used to assess efficacy. Direct costs were evaluated and allowed the calculation of the ICER （incremental cost-effectiveness ratios） for the major endpoint of the trial. Sixteen patients were included in the study. The duration of myelosuppression was significantly decreased in the Filgrastim arm with medians of 15 days vs. 19 days in the placebo arm （p = 0.023）. Cost analysis showed no statistically significant difference between the two arms. According to the calculation of ICER, Filgrastim was more costly and more effective than placebo for the number of days of aplasia avoided and the number of days with fever avoided. Placebo strictly dominated filgrastim for days of hospitalization avoided. Filgrastim has proven effective in reducing the duration of aplasia without increasing costs.

关键词： Filgrastim placebo cost effectiveness allogeneic bone marrow transplantation.

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