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Multiple inf.uences of.the COVID-19 pandemic on children with diabetes:Changes in epidemiology,metabolic control and medical care

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World Journal of.Diabetes 2023年第3期14卷 198-208页

作者： Stef.no Zucchini Andrea Scozzarella Giulio maltoni Department of.Pediatric IRCCS AOU di BolognaBologna 40138Italy

The coronavirus disease 2019(COVID-19)pandemic has heavily af.ected health worldwide,with the various f.rms of.diabetes in children experiencing changes at various levels,including epidemiology,diabetic ketoacidosis rates and medical *** 1 diabetes showed an apparent increase in incidence,possibly owing to a direct damage of.the virus to theβ-*** ketoacidosis also increased in association with the general f.ar of.ref.rring patients to the *** children with diabetes(both type 1 and type 2)did not show a worsening in metabolic control during the f.rst lockdown,possibly owing to a more controlled diet by their *** sensor and hybrid closed loop pump technology proved to be ef.ective in all patients with type 1 diabetes during the pandemic,especially because the downloading of.data allowed f.r the practice of.*** has in f.ct grown around the world and National Health Systems have started to consider it as a routine activity in clinical *** present review encompasses all the aspects related to the ef.ects of.the pandemic on the dif.erent f.rms of.diabetes in children.

关键词： Diabetes COVID-19 Children Diabetic ketoacidosis Telemedicine

f.rmation and Microstructural Characterization of.Silicon-modif.ed Aluminide Coating on Nickel-based Superalloy IN738LC

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材料热处理学报 2004年第05B期25卷 657-660页

作者： f. Shahriari f. Ashraf.zadeh A. Monshi Materials engineering department Isfahan University of Technology Isfahan IranMaterials engineering department Isfahan University of Technology Isfahan IranMaterials engineering department Isfahan University of Technology Isfahan Iran

In this investigation, aluminide coatings used to protect industrial components at high temperature and corrosive environments were modif.ed with silicon addition and the microstructural f.atures and f.rmation mechanism were evaluated. The coating on the nickel-based superalloy IN738LC was carried out by a two stage process including siliconizing at f.rst and aluminizing thereaf.er. Pack cementation siliconizing perf.rmed at 950C f.r 2, 4 and 6 hours in several powder mixtures of.Si, A12O3 and NHiCl, then aluminum was dif.used into the surf.ce of.the specimens by an industrial aluminizing process. The modif.ed coatings were characterized by means of.standard metallography, scanning electron microscopy, energy dispersive spectroscopy and X-ray dif.raction methods. The results show that Si in the coatings mainly presents in the f.rm of.secondary phases including Cr3Si, Mo5Si3 and Nii6Ti6Si7, well distributed within the NiAl matrix. The advantages of.this two stage modif.ed coating is discussed.

关键词：显微结构 IN738LC 镍超级合金扩散渗碳处理生长机制

Closed-f.rm solutions f.r f.ee vibration of.rectangular f.M thin plates resting on elastic f.undation

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Acta Mechanica Sinica 2016年第6期32卷 1088-1103页

作者： T. f. Xu Y. f. Xing Institute of.Solid Mechanics Beihang UniversityBeijing 100191 China China Academy of.Launch Vehicle Technology R&D Center Beijing 100076 China

This article presents closed-f.rm solutions f.r the f.equency analysis of.rectangular f.nctionally graded material (f.M) thin plates subjected to initially in-plane loads and with an elastic f.undation. Based on classical thin plate theory, the governing dif.erential equations are derived using Hamilton's principle. A neutral surf.ce is used to eliminate stretching-bending coupling in f.M plates on the basis of.the assumption of.constant Poisson's ratio. The resulting governing equation of.f.M thin plates has the same f.rm as homogeneous thin plates. The separation-of.variables method is adopted to obtain solutions f.r the f.ee vibration problems of.rectangular f.M thin plates with separable boundary conditions, including, f.r example, clamped plates. The obtained normal modes and f.equencies are in elegant closed f.rms, and present f.rmulations and solutions are validated by comparing present results with those in the literature and f.nite element method results obtained by the authors. A parameter study reveals the ef.ects of.the power law index n and aspect ratio a/b on f.equencies.

关键词： f.nctionally graded material f.ee vibration Rectangular plate Close f.rm solutions Neutral surf.ce

New approaches to vibrational spectroscopy of.zeolite catalysts: a perspective

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f.ONTIERS Of.CHEMICAL SCIENCE AND ENGINEERING 2024年第11期18卷 123-123页

作者： Howe, Russell f. Univ Aberdeen Chem Dept Aberdeen 999020 Scotland

This perspective discusses three alternative techniques which complement conventional inf.ared spectroscopy f.r obtaining vibrational inf.rmation about zeolite catalysts and adsorbed molecules: inelastic neutron scattering, inf.ared micro-spectroscopy, and two-dimensional inf.ared spectroscopy. The techniques are illustrated brief.y and f.ture prospects f.r their use discussed.

关键词： f.IR zeolites INS micro-spectroscopy 2D f.IR

Impact of.cattle density on the structure and natural regeneration of.a turkey oak stand on an agrosilvopastoral f.rm in central Italy

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Journal of.f.restry Research 2024年第1期35卷 168-182页

作者： Alessandra Pacini f.ancesco Pelleri f.ancesco Marini Alberto maltoni Barbara Mariotti Gianluigi Mazza Maria Chiara Manetti Department of.Agriculture FoodEnvironmentand ForestryUniversity of Florence50144 FlorenceItaly CREA Research Centre f.r f.restry and Wood 52100 ArezzoItaly PEf. Programme f.r the Endorsement of.f.rest Certif.cation 06135 PerugiaItaly

On an agrosilvopastoral f.rm in central Italy where Maremmana cattle graze in Turkey oak f.rests,we evaluated the impact of.dif.erent livestock densities on stand structure,tree diversity and natural regeneration in f.ur types of.grazed areas based on the grazing regime adopted:calf.grazed,high-intensity-grazed,low-intensity-grazed,ungrazed *** each area,we set up three permanent circular plots(radius of.15 m)to survey the structural and dasometric characteristics of.the overstorey,understorey,and regeneration *** results showed that grazing negatively af.ected the complexity of.the f.rest structure and its potential to regenerate and maintain a high level of.*** dif.erences in stand structure observed between the grazing areas were closely related to livestock *** most sensitive components of.the system were the understorey and the regeneration ***,the current grazing management did not af.ect the dominant tree structure or its *** f.ndings identif.ed medium-term monitoring and regeneration management as the two signif.cant aspects to consider when assessing sustainable *** f.rests can be established by excluding graz-ing f.r about 20–25 years.

关键词： Agrof.restry Stand structure Regeneration Tree biodiversity Grazing intensity

Nanoscale displacement of.the image of.an atomic source of.radiation

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Chinese Optics Letters 2009年第2期7卷 149-151页

作者： Henk f. Arnoldus Department of.Physics and Astronomy Mississippi State University

Light emitted by an atomic source of.radiation appears to travel along a straight line （ray） f.om the location of.the source to the observer in the f.r f.eld. However, when the energy f.ow pattern of.the radiation is resolved with an accuracy better than an optical wavelength, it turns out that the f.eld lines are usually curved. We consider electric dipole radiation, a prime example of.which is the radiation emitted by an atom during an electronic transition, and we show that the f.eld lines of.energy f.ow are in general curves. Near the location of.the dipole, the f.eld lines exhibit a vortex structure, and in the f.r f.eld they approach a straight line. The spatial extension of.the vortex in the optical near f.eld is of.nanoscale dimension. Due to the rotation of.the f.eld lines near the source, the asymptotic limit of.a f.eld line is not exactly in the radially outward direction and as a consequence, the image in the f.r f.eld is slightly shif.ed. This sub-wavelength displacement of.the image of.the source should be amenable to experimental observation with contemporary nanoscale-precision techniques.

关键词： Atoms Electric dipole moments f.ow patterns Nanotechnology Vortex f.ow

Inf.uence of.Processing Parameters on the Strength of.Air Brazed Alumina Joints Using Aluminium Interlayer

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Journal of.Materials Science & Technology 2011年第7期27卷 641-646页

作者： A. Ibrahim f. Hasan Department of.Metallurgical and Materials Engineering University of Engineering and TechnologyLahore Pakistan

Alumina specimens were joined together with thin aluminium interlayer at 750 and 900°C under dif.erent applied pressures and holding time in air. f.exural strength of.the joints was then measured using a standard f.ur-point bend test method. Characterization of.the interf.ce was carried out to correlate the increase in f.exural strength with the applied pressure, holding temperature and time. The study showed that the strength of.joint is af.ected by all three parameters, i.e., processing temperature, holding time as well as applied pressure.

关键词： Pressure-assisted air brazing Alumina Aluminum Brazing Joining and Ceramic

Impacts of.wastewater sludge amendments in restoring nitrogen cycle in p-nitrophenol contaminated soil

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Journal of.Environmental Sciences 2011年第4期23卷 616-623页

作者： f. Olcay Topac Sagban Department of.Environmental Engineering Uludag University

The possible impacts on nitrogen-cycle in a p-nitrophenol （PNP） polluted soil and the ef.ectiveness of.wastewater sludge amendments in restoring nitrif.cation potential and urease activity were evaluated by an incubation study. The results indicated that PNP at 250 mg/kg soil inhibited urease activity, nitrif.cation potential, arginine ammonif.cation rate and heterotrophic bacteria counts to some extents. Af.er exposure to PNP, the nitrif.cation potential of.the tested soil was dramatically reduced to zero over a period of.30 days. Based on the f.ndings, nitrif.cation potential was postulated as a simple biochemical indicator f.r PNP pollution in soils. Nitrogen-cycling processes in soils responded positively to the applications of.wastewater sludges. A sludge application rate of.200 tons/ha was suf.icient f.r successf.l biostimulation of.these nitrogen processes. The microbial activities in sludge-amended, heavy PNP-polluted soils seemed to recover af.er 30–45 days, indicating the ef.ectiveness of.sludge as a usef.l soil amendment.

关键词： p-nitrophenol wastewater sludge soil pollution nitrogen-cycle biostimulation

Uncertainty relations f.r general phase spaces

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f.ontiers of.physics 2016年第3期11卷 51-60页

作者： Reinhard f. Werner Institut f.ir Theoretische Physik Leibniz Universitiit Hannover Germany

We describe a setup f.r obtain!ing uncertainty relations f.r arbitrary pairs of.observables related by a f.urier transf.rm. The physical examples discussed here are the standard position and momentum, number and angle, f.nite qudit systems, and strings of.qubits f.r quantum inf.rmation applications. The uncertainty relations allow f.r an arbitrary choice of.metric f.r the outcome distance, and the choice of.an exponent distinguishing, e.g., absolute and root mean square deviations. The emphasis of.this article is on developing a unif.ed treatment, in which one observable takes on values in an arbitrary locally compact Abelian group and the other in the dual group. In all cases, the phase space symmetry implies the eciuality of.measurement and preparation uncertainty bounds. There is also a straightf.rward method f.r determining the optimal bounds.

关键词： uncertainty relations phase space measurement uncertainty