A New D(k) Relationship for Edc37

Hodgson, Alexander; Lambourn, B. D.; Handley, Caroline

doi:10.1063/1.3295107

Cited by 3 publications

(3 citation statements)

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“…[2,7] Carben-Übertragungsreaktionen sind jedoch häufig durch Nebenreaktionen wie Dimerisierungen und/oder Oligomerisierungen erschwert, die jeweils Alkene (Carbendimere) oder schlecht definierte Carbenoligomere und -telomere liefern. In einigen Fällen kann die Carbendimerisierung gewünscht sein, beispielsweise bei einer neuen Synthese unsymmetrischer cis-2-En-1,4-diester aus zwei unterschiedlichen Diazoacetaten, [8] [13][14][15] Die Veröffentlichung einer beispiellosen stereoselektiven Polymerisation von "Carbenen" aus Ethyldiazoacetat (EDA) zu einem hochmolekularen Poly(ethyl-2-ylidenacetat) (PEA; Schema 1 b mit X = H, Y = CO 2 Et) war kürzlich in dieser Hinsicht bahnbrechend. […”

Section: Die Stereokontrollierte Synthese Vonunclassified

Carbenchemie: stereoreguläre Polymere aus Diazoverbindungen

Noels

2007

Angewandte Chemie

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Section: Die Stereokontrollierte Synthese Vonunclassified

Carbenchemie: stereoreguläre Polymere aus Diazoverbindungen

Noels

2007

Angewandte Chemie

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“…33 From the literature study, it was noted that the SCC mixture design could be powder-based, admixture-based, or a combination. 34,35 In the present study, a powder-based mixture design for the SCC was adopted. The basic premise of powder-based SCC mixture design is to achieve acceptable fresh state properties using powder additions (pozzolanic or inert) at minimum HRWRA dosage.…”

Section: Scc Mixture Designmentioning

confidence: 99%

Thermal Conductivity Studies for Self-Compacting Concrete with Sand and Fly Ash Variation

Gandage¹,

Ram²,

Yaswanth³

et al. 2015

ACI Materials Journal

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The thermal properties of self-consolidating concrete (SCC) influence its durability performance. Thermal properties (specific heat, coefficient of thermal expansion, and thermal conductivity) of concrete are governed by the thermal properties of the constituent materials. Fine aggregates have a significant role in fresh as well as hardened state properties of the concrete mixture. The availability of natural sand (NS) is limited due to environmental regulations. Crushed sand (CS) is an emerging alternative to NS for concrete preparation. An experimental study was undertaken to measure thermal conductivity (k) values for an M-40 grade SCC mixture, with varying fly ash dosage, prepared with NS and CS. The k values were determined for normal service temperature range of 86 to 176°F (30 to 80°C) using the steady-state method. The experimental results were analyzed and empirical relations between the k value and the density, as well as with temperature, were developed. The 28-day compressive strength for SCC mixtures with CS was 18% and 35% more than the NS concrete mixtures at 0% fly ash and at 40% fly ash addition level, respectively. The k value for the SCC mixtures with CS was 6.25% and 2.38% more than the SCC mixtures with NS at a temperature range of 86 to 104°F (30 to 40°C) and 158 to 176°F (70 to 80°C), respectively, without any fly ash addition. At 40% fly ash addition level, the k value for the SCC mixtures with CS was 26.39% and 4.12% more than NS-based mixtures at 86 to 104°F (30 to 40°C) and at 158 to 176°F (70 to 80°C), respectively. Durability and sustainability of concretes may be enhanced by using CS instead of NS.

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“…[21,22] GPS signals have been successfully used in inferring atmospheric refractivity profiles. Anderson [23] used a direct inference technique to predict the refractivity profiles from low-elevation angle measurements of GPS signals. However, this technique achieves only moderate success because of the limitations presented by path-induced random range/elevation angle errors.…”

Section: Introductionmentioning

confidence: 99%

Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion

Zhang

Zhao³

et al. 2012

Chinese Phys. B

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The maritime tropospheric duct is a low-altitude anomalous refractivity structure over the ocean surface, and it can significantly affect the performance of many shore-based/shipboard radar and communication systems. We propose the idea that maritime tropospheric ducts can be retrieved from ocean forward-scattered low-elevation global positioning system (GPS) signals. Retrieval is accomplished by matching the measured power patterns of the signals to those predicted by the forward propagation model as a function of the modified refractivity profile. On the basis of a parabolic equation method and bistatic radar equation, we develop such a forward model for computing the trapped propagation characteristics of an ocean forward-scattered GPS signal within a tropospheric duct. A new GPS scattering initial field is defined for this model to start the propagation modeling. A preliminary test on the performance of this model is conducted using measured data obtained from a 2009-experiment in the South China Sea. Results demonstrate that this model can predict GPS propagation characteristics within maritime tropospheric ducts and serve as a forward model for duct inversion.

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A New D(k) Relationship for Edc37

Cited by 3 publications

References 1 publication

Carbenchemie: stereoreguläre Polymere aus Diazoverbindungen

Carbenchemie: stereoreguläre Polymere aus Diazoverbindungen

Thermal Conductivity Studies for Self-Compacting Concrete with Sand and Fly Ash Variation

Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion

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