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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"BBR"”.
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EVALUATION OF PHASE ANGLE AS A PRACTICAL PARAMETER FOR LOW TEMPERATURE SPECIFICATION GRADING OF ASPHALT BINDERS
… tests such as the bending beam rheometer (BBR) and extended BBR (EBBR) tests are not without limitations. They could be time-consuming and require more sample quantity even though they are rigorous and accurate. Hence, this study aims to examine the viability of limiting phase angle …
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Validation of New Asphalt Cement Specification Test Methods Using Eastern and Northeastern Ontario Contracts and Trial Sections
… The LS-308 Extended Bending Beam Rheometer (BBR) Method involves testing of asphalt cement in a regular BBR after specific times of conditioning at –10ºC and –20ºC. The LS-299 Double-Edge-Notched Tension (DENT) Test involves testing of asphalt cement in DENT configuration at 15ºC and 50 …
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Evidence for enhanced oxidative stress in smokers with severe asthma
… to obtain bronchial biopsy (BB) and brushing (BBr) was performed in a subset of patients. Urinary 8-iso-PGF2a was quantified using mass spectrometry. IS, BB and BBr were processed for mRNA expression microarray analysis. Results Urinary 8-iso-PGF2a was increased in SAs/ex compared to SAn (p< …
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Copa : practical delay-based congestion control for the internet
… much lower delay, fairer with diverse RTTs), BBR and PCC (significantly fairer, lower delay), and co-exists well with Cubic unlike BBR and PCC. Copa is also robust to non-congestive loss and large bottleneck buffers, and outperforms other schemes on long-RTT paths.
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Rheological and nanomechanical characterization of aging in polymer modified asphalt
… Recovery (MSCR) test, Bending Beam Rheometer (BBR) test, Rotational Viscosity (RV) test and the Direct Tension (DT) test. Nanomechanical properties such as hardness and reduced elastic modulus are determined using a nanoindenter. Laboratory test results are expressed in terms of Aging Index …
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Investigating the metabolic impact of Metformin and Berberine in combination with Venetoclax for Acute Myeloid Leukaemia treatment
… HL60 cell line, unlike Berberine and Venetoclax (BBR+Ven). The combination treatments increased lactate production compared to their monotherapy, however Met+Ven increased lactate retention and reduced expression of the lactate efflux protein MCT4, whereas BBR+Ven increased MCT4 expression. Both …
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Linear viscoelastic characteristics of Michigan asphalt mixtures and the effect of sample size on material properties
… were tested using the Bending Beam Rheometer (BBR) testing machine to obtain the Creep Compliance (D(t)). This study showed that there is a trend in D(t) values obtained from the BBR, but on the other hand; the factor between |E*|-based and TBM-based D(t) values was not consistent and ranged …
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Material Characteristics of Hot Mix Asphalt and Binder Using Freeze-Thaw Conditioning
… of HMA. Furthermore, Bending Beam Rheometer (BBR) test is performed on the binder that is used for the HMA. Similarly, the binder is also subjected to freeze-thaw conditioning to determine the stiffness with respect to increasing freeze-thaw. The findings from this study show that freeze-thaw …
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Nuclear magnetic resonance studies of boron trihalide complexes of 1,1-BIS (dimethylamino) ethylene and related bases
… quantities in t he DME-BF3-BC13 and DME-BF,-BBr, systems by reaction of free DME with DME:BF2X (X = Cl, Br). Restricted r otation about the C-N bonds of TMUlBC13 and n1U:BBr3 has been observed at low temperatures. This complements previous work in this system and confirms oxygen donation of …
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The effect of mica on the aging of asphalt binder
… Microscope (SEM). Bending Beam Rheometer (BBR) and nanoindentation tests are conducted on mastics mixed with one of the binders and various concentrations of mica-fines aged at different levels. In this study, SEM images of mastic are taken. During the mixing of the mastics, it is found …
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Elasticity detection : a building block for internet congestion control
… lower when cross traffic is inelastic. Unlike BBR, Nimbus is fair to Cubic, and has significantly lower delay by 40-50 ms. Compared to Copa, which also switches between a delay-controlling and a TCP-competitive mode, Nimbus is more robust at correctly detecting the nature of cross traffic, and …
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NMR studies of the exchange reactions of CH3CN.BX3 with excess CH3CN /|nJoseph Fogelman. -- 260 St. Catharines, Ont. : [s. n.],
… density at the boron nucleus to vary as BF3<BC1~ BBr 3 and therefore, the acid strength would vary as BF~BC1)BBr3: However, for the boron trihalides, the trend is in the opposite direction as determined experimentally. Considerable back-bonding (20), (21) between the halogen and the boron atoms …
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Cracking potential of short- and long-term aged binder with various levels of ABR
… rheometer (DSR) and bending beam rheometer (BBR) tests. Binders from five AC designed with varying ABR percentages (from 0 to 60%) were recovered using the standard Rotovap test procedure. The base binder used in the AC design and binders recovered from RAP and RAS were also tested. In …
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Characterization of Polymer Modified Asphalt Binders Containing Processed Oil
… asphalt binders containing 6% processed oil. The BBR results for modified asphalt binders showed that the incorporation of CRM, SIS, SBS and PE and processed oil improved the low temperature cracking resistance significantly, due to the high penetration rate of processed oil in asphalt binders …
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Improving Data Quality for High Resolution Functional MRI in Cognitive Neuroscience Applications
… the utility of boundary-based registration (BBR) realignment to improve on conventional RMC techniques to realign fMRI time series. Some motion artefacts affect the image in non-rigid ways and thus, voxel-based registration (VBR), generally utilized in conventional RMC, might be insufficient …
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Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada
… Rheometer (DSR) and Bending Beam Rheometer (BBR) and the improved Ministry of Transportation of Ontario methods (LS-308 Extended Bending Beam Rheometer (eBBR) and LS-299 Double-Edge Notched Tension (DENT) test). Chemical test methods like Fourier Transform Infra-red (FTIR) spectroscopy and …
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Zur Bedeutung der polyTC-Motive in den Promotoren und 5‘-UTR-Bereichen konstitutiv exprimierter Pflanzengene
… Polypyrimidin-bindenden Transkriptionsfaktors BBR aus der Gerste (Hordeum vulgare, Santi 2003) und Gbp aus der Sojabohne (Glycine max, Sangwan 2002) kloniert und aufgereinigt werden. Diese AtBR-Proteine mit einer stark homologen, jedoch bislang unbekannten DNA-, beziehungsweise …
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Tunnelling Effects on Bored Piles in Clay
… The case study at 4-18 Bishops Bridge Road (BBR) showed the effects of earth pressure balance (EPB) tunnel boring machine (TBM) tunnelling on an overlying piled building. The other case study at Kempton Court showed the effects of sprayed concrete lining (SCL) tunnelling on an overlying piled …
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Síntese e estudo do mecanismo de inibição do transporte de elétrons fotossintético de novos análogos aos rubrolídeos e estudos sintéticos dirigidos para o furanocembranolídeo (-)-deoxipukalídeo
… foram obtidos após etapa de desproteção com BBr 3. De uma forma geral, os compostos que apresentaram as maiores atividades de inibição do transporte de elétrons fotossintético foram os que possuíam grupos retiradores de elétrons. Todos os compostos que inibiram a síntese de ATP xxx também …
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Laboratory characterization and field performance of hot in-place recycled mixtures
… Rheometer (DSR) and Bending Beam Rheometer (BBR) tests were conducted for binder level investigation. The binder level tests showed that binder grades varied from very soft grade of PG 40-46 (Machesney 15-16) to as stiff as PG 76-28 (Dyer) when evaluated assuming field aged condition. The …
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