— variation of in place concrete strength in structures
compendium of case histories on repair of erosion-damaged concrete in hydraulic structures
... of the system using a proprietary pipe-lining process This lining process is a method of installing a new solid lining in an existing pipeline in which pipe segments between manholes are relined ... ,- I Stilling basin and outlet works Stilling basin Stilling basin Spillway apron and stilling basin Spillway piers, weirs, and stilling basin Stilling basin Stilling basin Stilling basin and outlet ... Stilling basin Stilling basin and outlet works Stilling basin Outlet works Stilling basin Stilling basin and conduit Spillway and outlet tunnels Outlet works Stilling basin Stilling basin and...
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in-place methods to estimate concrete strength
... strength of cores because core strength is the most established and accepted measure of in- place strength Cast -in- place cylinders are also useful in determining the in- place strength of new concrete, ... for determining the in- place strength of concrete in existing structures In- place testing is often one facet of an overall investigation to establish structural adequacy The guidelines in ACI 437R ... number of replicate in- place tests; Vi = coefficient of variation of in- place test; and Vs = coefficient of variation of standard test For planning purposes, the coefficients of variation given in...
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nondestructive test methods for evaluation of concrete in structures
... access—Many concrete structures present access difficulties for programs combining visual inspection and intrusive testing Examples of such difficult inspection situations include: • Retaining ... performance of NDT investigations Included in Chapter are references to in- place tests covered in ACI 228.1R and other applicable methods for evaluating the in- place characteristics of concrete ... considered in interpreting the results Also, the presence of reinforcing steel within the influence zone will affect the count rate Radiographic methods allow the possibility of seeing some of the internal...
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Spatial Variation of Metal Concentrations in Watercourses of an Urban River Basin in Southeastern Brazil
... plotted in the basin map according to incremental areas of influence of the monitoring stations Delineation of the areas of influence of monitoring stations Delineation of the area of influence of ... activities are industry and mining Significant pollution loads are discharged into the tributary rivers, mainly from domestic sewage and mining effluents In the middle and lower sectors of the basin, population ... These results are in agreement with the intense mining and mineral-related activities in this area The southern region of the basin includes the area known as “Iron Quadrangle” (one of the world’s...
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Báo cáo khoa học: The involvement of human ribonucleases H1 and H2 in the variation of response of cells to antisense phosphorothioate oligonucleotides pot
... number of sequence-independent artefacts, most of which are attributable to their ability to bind a number of heparin-binding proteins [28] In our search for allele-speci®c inhibitors based on singlenucleotide ... discussing PS-ODN-mediated inhibition of gene expression warn against erroneous interpretation of results caused by the protein-binding capacity of PS-ODNs [27,28] The lack of reactivity of HEK293 ... arrow indicates the digested product bands The amount of digested product obtained is indicated at the bottom of the lanes as percentage of total signal detected in the lane (remaining uncut input...
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Variation of Chest Radiographic Patterns in Pulmonary Tuberculosis by Degree of Human Immunodeficiency Virus–Related Immunosuppression pot
... HIV-infected patients with pulmonary TB has important clinical implications because of the increased susceptibility of HIV-infected patients to a variety of other respiratory pathogens Much of ... performed combining interstitial disease with in ltrates, there remained no significant relationship between CD4/ cell count and any in ltrates evident radiographically (with CD4/ cell counts of 0/mm3, ... immunodeficiency In ltrates were observed to be more frequent with higher CD4/ cell counts in our study as well as in the study of Mukadi et al [3] Pooling the results of these two studies and that of Batungwanayo...
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worlds of food place power and provenance in the food chain apr 2008
... Library Cataloguing in Publication Data Data available Library of Congress Cataloging -in- Publication Data Morgan, Kevin Worlds of food : place, power, and provenance in the food chain / Kevin Morgan, ... agri-food geography in terms of binary oppositions—such as, for example, conventional v alternative, and global v local In order to begin to overcome such binary thinking, in the last part of the chapter ... though the forces of standardization and industrialization would succeed in engineering a homogeneous food culture in which spatial variation became of decreasing signiWcance In line with this view,...
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variation of the germinable soil seed banks in a pasture infested by parthenium hysterophorus l.at kilcoy, south-eastern queensland
... interpreting the results of various intensities of disturbance, and interpreting the pathways of natural regeneration and the strategies of establishment of individual species (Buhler 1997; Hopkins ... depend on several factors including rainfall pattern, subsequent germination timing at a site, timing of seed input into the seed banks and seed losses due to predators (Coffin & Lauenroth 1989; McIvor ... overgrazing in rangelands normally resulted in lowering the density of perennial grasses while increasing the density of weeds and other annual species in the plant community These trends in botanical...
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Báo cáo nghiên cứu khoa học: "Analysis of Early-age cracking in restrained ring specimens of high performance concrete using finite element method" pdf
... the two rings are constantly in contact and as the concrete ring dies, strain gages monitor the steel ring strain In the finite element analysis the strain information was used as input using the ... decrease in W/B mix of concrete, the cracking is earlier and area of cracking is near the inner surface of concrete ring References American Concrete Institute (ACI) Committee 209R-92 Prediction of ... surface of steel ring are usually with contact When the concrete shrink, the steel ring will prevent the shrinkage of concrete so that arise the stress in concrete and steel ring According to...
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Báo cáo lâm nghiệp: "Variation of conducting area in stems of European larch (Larix decidua) growing in fresh mixed coniferous forest and fresh mixed forest sites" pdf
... the radius of a circle to the beginning of early wood, R – the radius of a circle to the beginning of late wood, P – earlywood area in annual ring Total area of early wood rings within the sapwood ... than in other Kraft’s classes, and it results probably from the inferior crown access to light, thus resulting in an inadequate stimulation of the increase in conducting area In the opinion of ... deviation from the trend to increase ring conducting area with an improvement of the social class of tree position in the stand (Fig 8A) Since the index is based on rings originating from sapwood, it...
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Báo cáo lâm nghiệp: "Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)" docx
... the value of the corrected coefficient of determination 49% of taper variation was explained by dbh and height of trees Differences between individual provenances in respect of tapering values ... stem profile variation Individual provenance regions differed in respect of the range of variation of relative diameters d0.05 at individual heights of the stem However, on the basis of a direct ... and in spite of a certain diversification of mean stem profiles of individual partial populations, no significant effect of the genotype (provenance) on their variation was found The variation of...
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Báo cáo lâm nghiệp: "Age trends in genotypic variation of wood density and its intra-ring components in young poplar hybrid crosses" doc
... resulting in an increase in radial variation within trees This presumption must be verified in future studies The mean wood density of a ring is a composite of several intra-ring components, including ... weight, a slight increase of clonal variation starting at to years of age as well as a steady decrease of environmental variation was observed, thus resulting in an increase in clonal repeatability ... containing four trees One systematic thinning was carried out (by removing every second tree in a row) in 1995 at the Platon site and in 1996 at the Windsor and Saint-Ours sites A subset of three...
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Báo cáo lâm nghiệp: "Genetic variation of Prunus avium in susceptibility to cherry leaf spot (Blumeriella jaapii) in spatially heterogeneous infected seed orchards" docx
... suspected, since the infection of this disease occurs through stomata in early spring Bud burst explained some of the variation in leaf spot incidence (17–65% of the leaf spot clonal variation ... analysis of variance using the SAS MIXED procedure [28] Clone by site interaction was analyzed combining the leaf spot data of year 2005 in Sergude with the Areas data of each year The following mixed ... 2005 in Sergude More than 96% of the trees were affected, in more or less extent, by this disease all years of study in each site Intensity of the disease damage was subjectively determined using...
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Báo cáo lâm nghiệp: "Radial variation of wood density components and ring width in cork oak trees" pptx
... component in the ring width remained particularly constant and was not significantly in uenced by any of the studied sources of variation DISCUSSION In spite of the difficulty in identifying ring boundaries ... the innermost rings and increasing it in the outward rings Until the beginning of cork extraction the accumulation of extractives should contribute to the higher density values found in the innermost ... lines for M and thicker lines for Y) Figure Variation of mean ring density with age for seven cork oak trees Figure Variation of latewood proportion in different growth rings Figure Variation of...
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Báo cáo lâm nghiệp: "Climatic signal in annual growth variation of silver fir (Abies alba Mill.) and spruce (Picea abies Karst.) from the French Permanent Plot Network (RENECOFOR)" ppsx
... for Abies alba in winter [24], high temperatures during the winter period could play a positive role in improving carbohydrate storage and growth of the following year Warming in winter could also ... Changes in frequency of extreme years of drought and in winter temperature regime, as predicted consequences of a climate change, may shift the dynamics of growth more or less abruptly in favour of ... stands in the French Jura and in Switzerland [10, 39], in the Vosges Mountains [3, 4], in the French and Italian Alps [19, 22, 43], in Belgium Ardenne [37], in Czech Republic [44] and in Germany...
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Báo cáo lâm nghiệp: "Genetic variation of wood density components in a radiata pine progeny test located in the south of Chile" pps
... pulps of loblolly pine containing 20–50% of latewood fibers had a good tearing strength while retaining acceptable levels for bursting and tensile strength They also mention that the proportion of ... moisture of 12% and resins were extracted with a solution of ethanol Intra-ring density information for each sample was obtained by using an indirect-reading X-ray densitometry system at the INRA ... heterogeneity has to take into account the genetic variation of within-ring density; (4) for radiata pine in Chile, wood microdensity variation from pith to bark is a good descriptor of within-tree heterogeneity;...
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Báo cáo lâm nghiệp: "Seasonal and intraspecific variation of frost tolerance in leaves of three Canarian laurel forest tree species" doc
... growing in the Canary Islands in order to understand whether the effect of freezing temperatures in the past could be the cause of their present confinement Chlorophyll fluorescence as an indicator ... by freezing temperatures showed an intraspecific variation between leaves exposed in the upper crown (sun leaves) and in the lower and inner parts (shade leaves) of the dense canopy of this forest ... seasonal variation of frost tolerance was tested Figure Example of variation of initial (Fo, white bar), maximal fluorescence (Fm, dark bar) and Fv/Fm ratio (square) in response to freezing temperatures...
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Báo cáo lâm nghiệp: "Genetic variation of Pinus pinaster Ait. seedlings in susceptibility to the pine weevil Hylobius abietis L." docx
... coefficients of variation (Tab III) also indicated high expected genetic gains Irrespective of including pine weevil resistance as an operational trait in the maritime pine breeding program in Galicia, ... E.S., McIntosh R.L., Bohlmann J., Mechanisms of resistance in conifers against shoot infesting insects, in: M.R Wagner et al (Eds.), Mechanisms and deployment of resistance in trees to insects, ... conifers in Europe including maritime pine (Pinus pinaster Ait.) which is one of the most important forest tree species of Galicia Actually, maritime pine is the most commonly planted species in this...
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Báo cáo lâm nghiệp: "Variation of morphological traits in natural populations of maritime pine (Pinus pinaster Ait.) in Morocco" pot
... maritime pine, including genetic diversity and ecophysiological studies, and are intended to fully represent variability among and within populations of Moroccan maritime pine Methods of sampling individual ... An inter-population comparison showed that wing width was more homogeneous, with an among-population coefficient of variation of 3.74% than wing length, having a coefficient of variation of 8.49% ... Aleppo pine range Aleppo pine showed a clinal pattern of variation (latitudinal, altitudinal and longitudinal) in cone, needle and seed traits similar to that described here for maritime pine [11]...
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Tìm thêm: xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế điều tra đối với đối tượng giảng viên và đối tượng quản lí nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008 chỉ tiêu chất lượng 9 tr 25