stress analysis of aircraft components
Methods of analysis of food components and additives
... established methods of analysis of food components and additives The book comprises 16 chapters, which take the reader through brief and accessible descriptions of methods of analysis of food components ... Sikorski Methods of Analysis of Food Components and Additives Edited by Semih Ötles , © 2005 by Taylor & Francis Group, LLC 1647_title 1/21/05 12:21 PM Page Methods of Analysis of Food Components and ... purposes in food analysis The second chapter, “Statistical Assessment of Results of Food Analysis, ” provides an overview of the need for statistical assessment of the results of food analysis and...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 1
... influence of Ge concentration on the formation of nanocrystals, a comparison of the Raman and TEM results of Samples B and C (i.e of medium and high Ge concentration) with Sample A (i.e of low Ge ... formation of Ge nanocrystals The voided region at the surface of the film for an annealing temperature of 800°C (i.e Figure 4.2) can be explained by the outdiffusion of Ge due to the low solubility of ... in the bulk of the film The inset of Figure 4.3 is the high resolution TEM (HRTEM) image of a well-formed single crystalline Ge nanocrystal There also exists a region that is void of nanocrystals...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 2
... growth of Ge nanocrystals in such a material In this chapter, the results of an investigation on the effects of annealing temperature, annealing time and Ge concentration on the formation of Ge ... 5.6: (a) Secondary ion mass spectrometry (SIMS) profiles of assputtered and annealed (800°C for 15 and 60 minutes) Samples B, (b) SIMS profiles of as-sputtered and annealed (900°C for 15 minutes) ... existence of Ge and Ge diffusion may decrease the crystallization temperature of HfAlO [13] In order to examine the effects of matrix crystallization and Ge concentration on the formation of Ge nanocrystals,...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 3
... are components of the elastic compliance tensor with S11 + 2S12 = 0.44 ×10-12 dyn-1 cm2 6.3.1 Effect of annealing time on the stress state of the nanocrystals In order to study the influence of ... hence, a decrease in the wavenumber of the vibrational mode In the case of compressive stress, the decrease of the lattice parameter yields a corresponding increase of the vibrational frequency From ... of silica and Ge, the latter being an order of magnitude higher than the former The differential expansion contributes to a tensile stress that reduces slightly the compressive stress state of...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 4
... Discussions IV Influence of the capping stressor In this section, we present results of stress development of the Ge nanocrystals by applying the silicon nitride (SiN) capping stressor It has been ... Section 6.3 7.2 Influence of the Annealing Technique In order to examine the effects of annealing technique on the growth and the stress states of the Ge nanocrystals, two sets of samples were prepared ... of the nanocrystals In this chapter, three different stress tuning methods will be proposed, namely the annealing techniques, the capping stressor and the dielectric matrix The stress state of...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 5
... and results in increase of formation of the smaller nanocrystal and hence the red shift of the Raman band [4] This effect of geometry (i.e U-shape groove) on the diffusion of Ge atoms to the Si ... compressive stress experienced by the nanocrystals - 170 - Chapter Figure 8.3: Results & Discussions V (a) Raman spectra of Sample A and Sample B after the RTA; (b) summary of Raman peak position of annealed ... function of the arriving angle The anisotropic KOH etching of silicon has resulted in a relatively smaller arriving angle at the bottom of the groove (i.e 70.6°) as comparing to the one of the...
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Early age thermal stress analysis of concrete
... case of thermal stress analysis of mass concrete, accurate input of the rate of heat generation due to hydration of concrete is pertinent It is also imperative that time-dependent properties of ... THERMAL STRESS ANALYSIS OF CONCRETE VELU PERUMAL B.E., M.Tech (IIT Madras, India) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF CIVIL ENGINEERING NATIONAL UNIVERSITY OF ... respect to age of concrete Of these, modulus of elasticity, development of tensile strength and creep behavior are key parameters implemented in thermal stress analysis 1.3.1 Modulus of Elasticity...
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Early age thermal stress analysis of concrete
... case of thermal stress analysis of mass concrete, accurate input of the rate of heat generation due to hydration of concrete is pertinent It is also imperative that time-dependent properties of ... THERMAL STRESS ANALYSIS OF CONCRETE VELU PERUMAL B.E., M.Tech (IIT Madras, India) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF CIVIL ENGINEERING NATIONAL UNIVERSITY OF ... respect to age of concrete Of these, modulus of elasticity, development of tensile strength and creep behavior are key parameters implemented in thermal stress analysis 1.3.1 Modulus of Elasticity...
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The Eyes of the Fleet - An Analysis of the E-2C Aircraft Acquisition Options docx
... of pipeline aircraft based on the number of PAA aircraft The pipeline aircraft can be thought of as the overhead necessary to keep the fleet at the minimum number of PAA aircraft The number of ... composition of the fleet, the various ages of the aircraft, and how the aircraft are used The E-2C program office, PMA-231, tracks the status, usage, and configuration of every E-2C aircraft The office ... Number of Aircraft 16 23 18 67 FLIGHT USAGE Aircraft life is typically defined in terms of total flight hours The projected life of an aircraft is based on fatigue testing and engineering analysis, ...
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Insights on Aircraft Programmed Depot Maintenance - An Analysis of F-15 PDM pptx
... on Aircraft Programmed Depot Maintenance: An Analysis of F-15 PDM based on many factors, including idiosyncrasies in what has happened to the aircraft, the aircraft s age, where and how the aircraft ... and the levels of key resources, e.g., number of mechanics, the availability of spare parts In addition, we recommend more systematic retention and analysis of historical data on aircraft that ... specific aircraft s condition Intermittent PDM is felt to be essential to keep some types of aircraft operating safely and effectively PDM increases capability by extending the lives of aircraft...
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ANALYSIS OF STRESS AND STRAIN
... shearing stress occurs on planes at 45 " to those of the principal stresses 5.9 Mohr's circle of stress A geometrical interpretation of equations (5.6) and (5.7) leads to a simple method of stress analysis ... the elastic stress- strain relations for two-dimensional system of direct stresses When Analysis of stress and strain 114 a shearing stress T~ is present in addition to the direct stresses IS, ... 45 to those of the O Mohr’s circle of stress Problem 5.4 107 At a point of a material the two-dimensional state of stress is shown in Figure 5.12 Determine o,, ozr and T8 Figure 5.12 Stress at...
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Aircraft Flight Dynamics Robert F. Stengel Lecture13 Analysis of Time Response
... Stability, speed of response, and damping are independent of the initial condition or input" Learjet 23! MN = 0.3, hN = 3,050 m" VN = 98.4 m/s" Differential Equations Produce State Rates of Change" ... angle of attack response to elevator are not zero" Steady vertical wind affects steady-state angle of attack but not pitch rate" Dynamic response to elevator step with LδE = 0! Speed Control of ... Response of Speed Controller " • Solution of the integral, with step command" • " 0, t < $ yC (t) = # $ 1, t ≥ % dy(t) u(t) Ce(t) C = = = [ yc (t) − y(t)], y ( ) given dt J J J • Integral of the...
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Aircraft Flight Dynamics Robert F. Stengel Lecture14 RootLocus Analysis of Parameter Variations
... 2.57s + 9.67 $ # %# % Summary of Root Locus Concepts " Destinations " of Roots" Origins " of Roots" Root Locus Analysis of Simplified Longitudinal Modes Center " of Gravity" Locus on " Real Axis" ... • • • Number of roots = 4" Number of zeros = 0" (n – q) = 4" • • • Number of roots = 4" Number of zeros = 1" (n – q) = 3" Δ(s) = d(s) + kn(s) #k→0→ d(s) ## Destinations of Roots (for k ... 0.00041s + 0.015 $ " s + 2.57s + 9.67 $ # %# % Origins of Roots (for k = 0) " • Origins of the roots are the Poles of d(s)" • All points on the locus of roots must satisfy the equation k[n(s)/d(s)]...
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Báo cáo y học: " Stress response regulators identified through genome-wide transcriptome analysis of the (p) ppGpp-dependent response in Rhizobium " docx
... involvement of secondary mutations To test heat stress survival, ml of each sample was incubated at 45°C for 30 minutes In case of oxidative stress, 0.1 ml of 100 mM H2O2 was added to 0.9 ml of each ... function of prkA in R etli, we constructed a non-polar deletion mutant A phenotypical analysis of this mutant, including survival during stationary phase, osmotic stress, oxidative stress and heat stress, ... http://genomebiology.com/2011/12/2/R17 of (p)ppGpp in E coli Of the many detected (p)ppGpp targets that may contribute to the observed stress phenotypes of the rsh mutant, we performed a phenotypic analysis of three specific...
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Báo cáo khoa hoc:" Global Transcriptome Analysis of Bacillus cereus ATCC 14579 in Response to Silver Nitrate Stress" pot
... cereus during early stages of silver stress (30 min) The prolonged silver stress leads to the decreased level of expression of genes involved in biosynthesis of flagellar components In addition, ... transcriptional analysis of B cereus ATCC 14579 in response to silver nitrate Results and Discussion Effect of silver nitrate on the viability of B cereus The effect of silver nitrate induced stress on ... nitrate The up-regulation of anti-sigma factor antagonist (rsbY) indicates the activation of σB induced global stress response Most of these induced genes are under the control of alternative sigma...
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báo cáo khoa học: "Comparative analysis of root transcriptome profiles of two pairs of drought-tolerant and susceptible rice near-isogenic lines under different drought stress" doc
... profiles in roots of two pairs of NILs in the nonstressed and two drought stress regimes at reproductive stage The numerical comparison of DEGs obtained from three biological replications of ... indicates the median of three qRT-PCR replicates, orange bar indicates the results of the median of three replications of microarray experiments (B) Correlation analysis of the ratio of differentially ... control of drought tolerance -3- Previous studies on genetics of drought tolerance in rice were primarily based on the analysis of mapping populations derived from parents of contrasting level of...
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báo cáo khoa học: " Haplotyping, linkage mapping and expression analysis of barley genes regulated by terminal drought stress influencing seed quality" pot
... genome sequencing The drought stress response of mapped transcripts over development To reveal the drought stress response of mapped transcripts during various stages of development, we normalized ... IIa Σ Haplotype analysis of carbohydrate metabolism genes A detailed analysis of sequence variants within 17 starch biosynthesis/degradation genes was conducted for a core set of 32 accessions, ... Conclusions The genetic mapping of 141 drought regulated ESTs has extended the abiotic stress SNP map of barley [7] by a further 134 novel markers An extensive expression analysis of these ESTs at various...
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báo cáo khoa học: " Comparative analysis of expressed sequence tags (ESTs) between drought-tolerant and -susceptible genotypes of chickpea under terminal drought stress" pot
... roots of resistant genotype (ICC 4958) under drought stress Up regulated in roots of extremes bulks of RILs of HRB under drought stress Down regulated in roots of extremes bulks of RILs of HRB ... discussion Water stress treatment A graph of NTR values of ICC 4958, ICC 1882, and 20 RILs during the stress treatment indicates that all parental lines and RILs experienced same degree of stress (Additional ... Page of 20 Figure A graphical representation of the annotation statistics of UG-TDS: the total number of unigenes annotated as a known protein with an E-value threshold of e-06, total number of...
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Báo cáo y học: " Rasch model analysis of the Depression, Anxiety and Stress Scales (DASS)" docx
... trait of anxiety of -1.78 (SD 1.01), and with 40% displaying no symptoms of anxiety DASS-21 -Stress Analysis of the stress scale items showed misfit to the Rasch model (p < 001) (Table – Analysis ... Rasch analysis Following this, Rasch analysis was performed on all items of the DASS-21 to evaluate the validity of using a total score from this scale as a measure of general psychological distress ... was slightly off target with a mean estimate on the latent variable of stress at -1.03 (SD = 1.35), with just 8% of the sample at the floor of the scale DASS-21 – Total All 21 items of the DASS-21...
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