influence of defects on fatigue life of aluminium pressure diecastings

... This reduction of the C/N ratio in the Ah horizon has already been described by von Zezschwitz (1985) The increased proportion of carbon in the Ah confirms the change in the humus form (von Zezschwitz, ... proportion was to be found in the Ah1horizon In 1960 the bulk density of the Of was 0.13 g/cm it contained only 9% twigs ; and arthropod faeces In 1986 the bulk density was only 0.02 g/cm it contained ... organic horizons exactly, but neverthless a L -Of- Oh chronology was to be found the whole year round In 1986 the soil solution contained soluble organic carbon (Beyer, 1989) This carbon belonged to...

Ngày tải lên: 08/08/2014, 23:22

... The effect of temperature on the corrosion behavior of AISI 304 stainless steel with MgCO3 deposit has been studied The oxidation rates were found to be influenced by both of time of exposure ... affect the corrosion rate other than time exposure and ionic salts The carbonate salt have a deleterious effect on the scales and rapid decomposition of the alloy is noted.7 CONCLUSION MgCO3 coated ... the formation of oxide layer scale on the surface of alloys exhibiting the formation of Cr2O3, NiO and SiO2 ACKNOWLEDGMENT The authors are very grateful to the Ministry of High Education, Malaysia...

Ngày tải lên: 07/08/2014, 14:20

... persists in constant conditions, such as constant darkness (DD), or constant light (LL) This continuance of ~24 h oscillations in a physiological or behavioural variable under constant conditions indicates ... adjusts to the new environmental conditions, are of particular concern for athletes competing at international destinations An initial investigation into the severity and longevity of jet lag in the ... regulation of melatonin synthesis and secretion The surprising absence of a circadian MT rhythm in DD is consistent with the conclusion that there is no endogenous circadian regulation of MT synthesis...

Ngày tải lên: 10/08/2014, 09:20

... abrupt transition to non-dilated ureter at the pelvo-ureteric junction (arrow) consistent with pelvo-ureteric junction obstruction of the lower moiety The upper moiety is non-dilated Page of (page ... vesico-ureteral junction obstruction secondary to a ureterocele of the upper moiety insertion, PUJO, calculi, intrinsic tumours and external compression Upper moiety obstruction is seen secondary to ectopic ... guided aspiration of the fluid collection This yielded thick pus from the collection and clear urine via Figure fat saturation and gadolinium enhancement T1-weighted coronal magnetic resonance imaging...

Ngày tải lên: 11/08/2014, 21:22

... Similarly, effects of consolidation histories, such as normal or overconsolidation or long-term application of consolidation pressure, has practically no effect on the positions of the normalized ... overconsolidation ratio, Λ = Material constant, Cc = Compression index, Cr = Re-compression / Swelling index The definition of apparent overconsolidation ratio in Equation 2.14 is the ratio of ... pore pressure, pNC ' = Mean effective stress before cyclic loading Conceptually, the above definition of overconsolidation ratio is inconsistent with the standard definition of overconsolidation...

Ngày tải lên: 09/09/2015, 11:10

... patterns of certain pathogens Since parenteral forms of ciprofloxacin and levofloxacin were not restricted for the first three days of therapy by NARP, the consumption of these quinolones was ... *nationwide antibiotic restriction program, **piperacillin-tazobactam NS:not significant, p>0.05 Table 2: Comparison of antibiotic consumption two years before and after the initiation of NARP* ... utilized more rationale after the initiation of NARP Also carbapenem 342 resistance rates of Pseudomonas spp and Acinetobacter spp decreased correlating with decreased consumption of carbapenems...

Ngày tải lên: 25/10/2012, 11:00

Ngày tải lên: 15/03/2014, 23:56

... n-3 PUFA consumption generally consists of varying the ratio of n-3 to n-6 PUFA without consideration of n-6 fatty acid consumption Very importantly, when calculating n-3 PUFA consumption, the ... Relative concentrations of individual n-3 PUFA were expressed as the percentage in a comparison of total PUFA contents of a combination of EPA, DHA, and DPA For comparison of the fatty acid concentration ... Relative concentrations of individual n-3 PUFA were expressed as the percentage in comparison of total PUFA contents of combination of EPA, DHA, and DPA Data represent the means ± SD of three...

Ngày tải lên: 16/03/2014, 10:20

... Random generation of sources Computation of the average misfit function for determination of initial temperature I N Iterations I, 10 iterations with a constant temperature for each point of source ... asterisk denotes convolution The first step is the reconstruction of the global contribution of the whole fault plane at a given station by the simulated annealing deconvolution, as explained ... functions calculated by deconvolution using expression (7) at a given station, and STF,,,, that obtained by summation of slip velocities on the fault plane using eq (8) As with deconvolution, we...

Ngày tải lên: 23/03/2014, 13:20

... correspond to reduction of the FNRsq to the hydroquinone state by a second Adx(4–108)rd This mechanism would suggest that upon consumption of FNRsq by the second process, the same amount of FNRsq ... reaction Reactions were followed at both 414 nm and 600 nm, where Adx reoxidation/reduction and FNR semiquinone formation can be followed, respectively A constant final FNR concentration of lM ... evacuation and flushing with O2-free Ar FNR was fully reduced by adding a 25 molar excess of NADPH under positive pressure of Ar A constant FNR concentration of lM and different Adx concentrations,...

Ngày tải lên: 31/03/2014, 07:20

... occurred before or along with acquisition of VP0 The secondary structure prediction of the 5'-noncoding region will help following this up, as soon as more 5'-noncoding region sequences of HPeV and HPeV4 ... http://www.virologyj.com/content/5/1/26 Figure Predicted secondary structure elements of the 5'-noncoding region (A) and 3'-noncoding region (B) Predicted secondary structure elements of the 5'-noncoding region (A) ... of the initiation codon, including a Kozak sequence (ANNAUGG) The predicted secondary structure of the 3' UTR of BNI788st is also shown in Figure The conformation in terms of relative sizes of...

Ngày tải lên: 20/06/2014, 01:20

... Ahmad, On the nonautonomous Volterra-Lotka competition equations,” Proceedings of the American Mathematical Society, vol 117, no 1, pp 199–204, 1993 S Ahmad and A C Lazer, On the nonautonomous ... Similarly to the proof of Propositions and in 12 , we can obtain the following Advances in Difference Equations Lemma 2.3 Any solution of system 2.7 with initial condition N > satisfies m ≤ lim ... proved in Section In Section 3, an example will be given to illustrate that 1.10 does not imply 1.9 ; that is, the condition 1.10 is better than 1.9 Advances in Difference Equations Proof of Theorem...

Ngày tải lên: 21/06/2014, 11:20

... positive solutions x n and x n of 2.3 Second, one considers the following nonautonomous linear equation: Δu n f n −e n u n , 2.5 where functions f n and e n are bounded and continuous defined on Z with ... 3.53 of system 3.52 b if assumption H4 holds, then each fixed positive solution x n , u1 n is globally uniformly attractive on R2 of system 3.52 Proof Based on assumptions H1 – H3 , conclusion ... difference equations are more appropriate than the continuous ones when the populations have nonoverlapping generations Discrete time models can also provide efficient computational models of continuous...

Ngày tải lên: 21/06/2014, 11:20

... population following a Holling type-II functional response with predation coefficients β, and half-saturation constant m k is the rate of conversion of nutrients into the reproduction rate of the ... population with proportionality constant r We also assume that the death rate of mature population is of a logistic nature, that is, proportional to the square of the population with proportionality ... section, we introduce the model In Section 3, some important lemmas are presented In Section 4, we give the globally asymptotically stable conditions of prey-extinction periodic solution of System...

Ngày tải lên: 21/06/2014, 11:20

... competition in prey population X β > denotes the per-capita rate predation of the predator population Y k > denotes product of the per-capita rate and the rate of conversing prey population X into ... competition) are investigated by many articles [5–8] In general, the exploitation of population should be determined by the economic and biological value of the population It is the purpose of this ... The application of impulsive delay differential equations to population dynamics is an interesting topic since it is reasonable and correct in modelling the evolution of population, such as pest...

Ngày tải lên: 21/06/2014, 17:20

... Picea sitchensis (Bong.) Carr, Plant Cell Environ 12 (1989) 63-72 [26] Philips N., Oren R., A comparison of daily representations of canopy conductance based on two conditional time-averaging ... concerning the pattern of azimuthal distribution of sap flux density according to the measurement height which could further support this conclusion Since it is based on measurements made on only ... natural conditions is questionable, since both methods rely on the analysis of pressure- flux relationships and water retention curves determined mainly under positive or slightly negative pressures...

Ngày tải lên: 09/08/2014, 04:20

... http://www.journal-inflammation.com/content/4/1/13 Table 2: Perfusion effects on the concentration of analyte Animal Animal IL1β concentration (pg ml-1; 250 µl) Amount of IL1β (pg) IL1β concentration (pg ml-1; ... http://www.journal-inflammation.com/content/4/1/13 measuring cellular components of inflammation In conclusion, as this new method of joint perfusion uses anaesthetised animals, acute effects of anti-inflammatory ... spectrophotometrically at 450 nm The minimum detection limit of the assay was pg ml-1 http://www.journal-inflammation.com/content/4/1/13 2.3.3 Perfusion effects on the concentration of analyte Two naïve rats were...

Ngày tải lên: 11/08/2014, 08:21

... European Association of Urology; hCG, Human chorionic gonadotropin; LDH, lactate dehydrogenase Consent We were unable to obtain consent for the publication of this case due to the death of the patient ... cycles of chemotherapy and five years of complete remission Case presentation A 52-year-old man presented to our outpatient clinic in a bad general condition of health and with severe pain of his ... nodes were found on the patient’s retroperitoneal space Two pulmonary metastases were also found in his left lung (Figure 2) A biopsy of the lytic bone lesion was carried out to confirm the diagnosis...

Ngày tải lên: 11/08/2014, 14:20

... systematic review of studies of psychological interventions for relatives of people with recent onset psychosis was conducted This identified the key components of effective interventions and distinguished ... LW contributed to design of the intervention, recruits and assesses participants, and manages the process of randomisation; VP contributed to the design of the intervention and management of the ... financial concerns, physical/ emotional health, stigma, worries about safety, their satisfaction with support offered and ease of obtaining information 8) The Relatives’ Satisfaction Questionnaire...

Ngày tải lên: 11/08/2014, 15:22