conduits and pipes embedded in concrete
guide for use of normal weight and heavyweight aggregates in concrete
... Determining the Fire Endurance of Concrete Elements 304R Guide for Measuring, Mixing, Transporting, and Placing Concrete 304.3R Heavyweight Concrete: Measuring, Mixing, Transporting, and Placing ... routine inspection of the material source and of the aggregate processing plant and handling system, all the way through to the point of batching; routine sampling and testing of production and ... balls in aggregate, which are detected by ASTM C 142, are weakened on wetting and may degrade on repeated wetting and drying 2.1.3 Heating and cooling—Heating and cooling induce stresses in any...
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prediction of creep, shrinkage, and temperature effects in concrete structures
... differential shrinkage strain, also subscript denoting differential strain or differential stress shrinkage strain in in. /in or mm/mm at any time ultimate (in time) shrinkage strain in inc. /in or mm/mm ... humidity and temperature, assuming the strain at loading (nominal elastic strain) as the instantaneous strain at any time The above definition treats the initial instantaneous strain, the creep strain, ... unrestrained shrinkage strain at any time, including ultimate values.6-7 They apply to normal weight, sand lightweight, and all lightweight concrete (using both moist and steam curing, and Types I and III...
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Effect of periodic suction on three dimensional flow and heat transfer past a vertical porous plate embedded in a porous medium
... his M Sc degree in Physics from Utkal University, Orissa (India) in 1982 and obtained his Ph D degree in Physics from the same University in 2002 He served as a Faculty of Physics in Nayagarh (Autonomous) ... Orissa (India) from 1982-2004 and presently working as the Head of the faculty of Physics in KBDAV College, Nirakarpur, Orissa (India) since 2004 He has 27 years of teaching experience and 10 ... sign in the above equation indicates that the suction is towards the plate Due to this kind of injection velocity the flow remains three dimensional All the physical quantities involved are independent...
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báo cáo hóa học:" Implantation of neural stem cells embedded in hyaluronic acid and collagen composite conduit promotes regeneration in a rabbit facial nerve injury model" doc
... days in 4% paraformaldehyde and embedded in paraffin Sections were de-waxed and stained with haematoxylin and eosin for histological examination Toluidine blue staining was performed to assess ... poly-L-ornithine- and laminin-coated coverslips displaying a microglial morphology derived Immunofluorescence staining of β-tubulin, glial fibrillary acidic protein (GFAP) and galactocerebroside (GalC) in ... Immunohistochemical staining of BrdU and S-100 was performed to track the homing of NSC and to mark nerve fibers in the facial muscles of injured rabbits with and without reconstruction Paraffin -embedded muscle...
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slag cement in concrete and mortar
... materials, or a combination of intergrinding and blending cement, portland blast-furnace slag—a hydraulic cement consisting of an intimately interground mixture of portland-cement clinker and granulated ... information suggests that drying shrinkage is similar in portland-cement concrete and concrete containing slag cement Klieger and Isberner (1967) found few differences between concrete containing ... Chapter 2—Storage, handling, and batching, p 233R-6 2.1—Storage 2.2—Handling 2.3—Batching Chapter 3—Proportioning concrete containing slag cement, p 233R-6 3.1—Proportioning with slag cement...
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aisc design guide 6 - load and resistance factor design of w-shapes encased in concrete
... portion of base plate, in. 2 = Area of reinforcing bars, in. 2 = Gross area of steel shape, in. 2 = Base plate width, in = Factors used in determining Mu for combined bending and axial forces when ... Ties @28 in Notes: KL in ft, and in inches Zeroes in columns for and indicate that no suitable reinforcing bar arrangement is available for the indicated steel percentage See Figure lor definition ... Engineering Station Bulletin, No 56, 1912, University of Illinois, Urbana, Ill Joint Committee Report on Standard Specifications for Concrete and Reinforced Concrete, August 1924 American Institute...
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causes, evaluation and repair of cracks in concrete structures
... 1.3.4 Weathering-The weathering processes that can cause cracking include freezing and thawing, wetting and drying, and heating and cooling Cracking of concrete due to natural weathering is usually ... Change, and Reinforcement on Cracking of Mass Concrete 207.4R Cooling and Insulating Systems for Mass Concrete 224R Control of Cracking in Concrete Structures 224.2R Cracking of Concrete Members in ... curing will enhance its freezing and thawing durability Other weathering processes that may cause cracking in concrete are alternate wetting and drying, and heating and cooling Both processes produce...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 1
... during the annealing process as no Ge–Ge Raman mode can be detected in the sample annealed in N2 alone On the other hand, the presence of H2 in the annealing ambient could also act as a reducing ... that annealing in N2 ambient up to 1000°C resulted in relatively featureless spectra, indicating that no Ge nanocrystals has been formed However, when the sample was annealed in forming gas, a ... were done only in inert argon ambient In this chapter, a systematic study on the influence of annealing ambient, temperature and Ge concentration on the growth of nanocrystals in a silicon oxide...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 2
... minutes Further increase in the annealing duration to 60 minutes resulted in the disappearance of such peak It should be pointed out here that annealing Sample C at 900°C and beyond resulted in ... 800oC for 60 minutes It appears that with an increase in annealing time, the Ge atoms in the matrix had out-diffused to the ambient instead of aiding in the growth of the existing nucleus, which ... observed indicating the presence of Ge nanocrystals in the HfAlO matrix However, at higher annealing temperatures (i.e 900 and 1000°C), no Ge peak can be detected Note that increasing the annealing...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 3
... effects altering these features will produce a change in the frequency of the band For instance, a tensile stress will result in an increase in the lattice spacing and, hence, a decrease in the wavenumber ... nanocrystals would grow and increase in number as the annealing duration increases, which causes an increase in P shown in Figure 6.5 Note that, there is no significant increase in P has been noticed ... annealing time of 60 minutes, the change in the hydrostatic pressure is obtained in Figure 6.5 - 135 - Chapter Results & Discussions III At 1000°C, an increase in annealing duration will result in...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 4
... nanocrystals, and hence resulting in a build-up and increase in stress On the other hand, a furnace annealing at 800°C for 15 minutes allows the growth of the nanocrystals due to its longer annealing time ... Luan and L C Kimerling, “Strain-induced band gap shrinkage in Ge grown on Si substrate”, Appl Phys Lett., vol 82, pp 2044-2046, 2003 [3] L K Lam, S Chen and D G Ast, “Kinetics of nickel-induced ... minimize their strain energy and thus minimize stress for the nanocrystals At 1000°C, the Ge atoms would become molten and lose their atomic ordering This resulted in a significant increase in...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 5
... inevitably cause the shadowing effect and results in the thicker film on the mesa and thinner film inside the groove It is well established that thermal annealing of Ge and silicon oxide system ... discussed in the following sections 8.4 Synthesis of Ge nanocrystals in U-shape groove In order to minimize the shadowing effect and make a relatively conformal film deposition, the KOH etching process ... at 800°C, indicating coarsening has taken place The significant increase in the diffusivity of Ge is most likely due to the fact that the annealing temperature was near the melting point of Ge...
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Detection of cracks in plates and pipes using piezoelectric materials and advanced signal processing technique
... reduction in E at D13 using (a) points and (b) 16 points 45 2.13 Relative change in mode for 50% reduction in E at D14 using (a) points and (b) 16 points 45 ix 2.14 Relative change in mode for 20% increase ... increase in E at D10 using (a) points and (b) 16 points 46 2.15 Relative change in mode for 50% reduction in E at D08 and D10 using (a) points and (b) 16 points 47 2.16 Relative change in mode ... 50% and 20% reduction in E at D12 and D13 respectively using (a) points and (b) 16 points 48 2.17 Relative change in mode for 50% and 20% reduction in E at D10 and D13 respectively using (a) points...
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Cambridge.University.Press.War.Land.on.the.Eastern.Front.Culture.National.Identity.and.German.Occupation.in.World.War.I.May.2000.pdf
... strikingly, after suppressing the 1863 revolt, Russia banned Coming to war land 37 printing of Lithuanian in Latin letters, seeking thus to remove Lithuanians from Polish inXuence, bringing them ... not drain oV into the poor soil and gathered into extensive rivers and lakes, marshes and bogs One soldier’s diary complained: ‘‘A gentle spring rain comes down during the entire day, and one ... valleys, a twilight of uncertain shapes and living forms Finally, rain would begin again Winters were harsh, as Siberian winds brought inWnities of snow to cover the land One awed oYcial felt ‘‘deep...
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The graphs below show the numbers of male and female workers in 1975 and 1995 in several employment sectors of the republic of Freedonia
... decades later The number of men in this sector remained stable over the period, at around 700 000 Women also made gains in both the finance/banking industries and in the defence-related public ... women worked in finance and banking institutions in 1975, the number increased to 450 000 by 1995 The number of men grew only marginally from 425 000 to 480 000 over the same period In defence, ... 1975 and 1995 brought significant changes in the representation of women in Freedonia's work force, according to the graphs In 1975, for example, some 300 000 men and 250 000 women worked in the...
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Báo cáo y học: "Management of chest pain: exploring the views and experiences of chiropractors and medical practitioners in a focus group interview"
... educational institution offering a training program coordinated by a medical physician However, this is in its infancy and much needs to be worked out This does indicate a growing level of interest in ... ascertain and possibly improve those skills, competencies, and standards for referrals and sharing of clinical information that may improve current and future cross-disciplinary coordination ... chest pain In order for chiropractors to have a role in managing chest pain from the point of entry, they must acquire and demonstrate competence in diagnosing the complaint Chest pain can have...
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Báo cáo y học: " High blood pressure, antihypertensive medication and lung function in a general adult population"
... Conclusions Our findings are in line with previous observations showing an inverse association between blood pressure and lung function Furthermore, our analysis indicates that BBL medication and not ... of high blood pressure and antihypertensive medication Thus, it allows only statements about a single point in time and does not allow evaluating the effect of long-standing high blood pressure ... Munich, Asklepios Hospital Gauting and Helmholtz Zentrum München, Munich, Germany 6Department of Internal Medicine B - Cardiology, Intensive Care, Pulmonary Medicine and Infectious Diseases, University...
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Báo cáo y học: "Trace Elements, Heavy Metals and Vitamin Levels in Patients with Coronary Artery Diseas"
... levels and mortality Arch Intern Med 2002; 162: 2443-2449 31 Rock E, Winklhofer-Roob BM, Ribalta J, et al Vitamin A, vitamin E and carotenoid status and metabolism during ageing: functional and ... vitamins A (retinol), D (cholecalciferol) and E (α-tocopherol) in patients with CAD MATERIALS AND METHODS The study population included 30 patients having angiographically demonstrated CAD and ... the vitamins (retinol, tocopherol and cholecalciferol), and trace elements and heavy metals (Zn, Cu, Fe, Cd, Pb and Mn) in patients with CAD and the control group are shown in Table Compared...
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Báo cáo y học: "A Comparison of Immuncapture Agglutination and ELISA Methods in Serological Diagnosis of Brucellosis"
... origin Ig G, Ig M and Ig A antibodies This method is brucella agglutination test that occurs in microwell and performed with Coombs antiserum and determines the three antibodies that form against ... Faculty of Medicine from various clinics were included in the study and kept at -70ºC until performing laboratory study Coombs anti-brucella test (Vircell, S.L., Spain), ELISA Ig G and Ig M (Vircell, ... negative, investigation of classic serologic tests and antibodies occupy an important place in diagnosis of brucellosis Antibodies begin to form weeks after the beginning of disease Those who engage in...
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Báo cáo y học: "Effect of Acute Administration of an Herbal Preparation on Blood Pressure and Heart Rate in Humans"
... treatment ingestion After eating, an increase in heart rate occurred in all three treatment groups The increase in heart rate does not coincide with the pharmacokinetics including blood levels and ... GJ Coronary spasm and thrombosis in a bodybuilder using a nutritional supplement containing synephrine, octopamine, tyramine and caffeine So African Med J 2008; 98: 372-373 Sander LC, Putzbach ... receptor binding It is well known that, in general, binding to α-adrenergic receptors results in vasoconstriction, with increased cardiovascular contractility and increased heart rate occurring in response...
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