Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Vanessa Rheinheimer"'
Publikováno v:
The Journal of Engineering (2017)
In many planar antenna array designs, impedance transformers are required to interconnect the elements to ensure that their impedances are matched. However, impedance transformers take up space and reduce area utilisation. If each element is electric
Externí odkaz:
https://doaj.org/article/62540ee182e145f29ff47c538e6ee7ae
Autor:
Vanessa Rheinheimer, Cise Unluer, Jiawei Liu, Shaoqin Ruan, Jisheng Pan, Paulo J. M. Monteiro
Publikováno v:
Materials, Vol 10, Iss 1, p 75 (2017)
MgO cements have great potential for carbon sequestration as they have the ability to carbonate and gain strength over time. The hydration of reactive MgO occurs at a similar rate as ordinary Portland cement (PC) and forms brucite (Mg(OH)2, magnesium
Externí odkaz:
https://doaj.org/article/5511242ef42d473099428e628dd57e58
Efforts are currently underway to improve the performance of small electric antennas and resonator-based antennas embedded in the civil infrastructure. One of the main limitations of these small antennas is that they have narrow bandwidths which limi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5033a6cc0ba37b8065a8affbb646d7db
https://hdl.handle.net/10356/162476
https://hdl.handle.net/10356/162476
Autor:
Vanessa Rheinheimer, Sejung Rosie Chae, Erich D. Rodríguez, Guoqing Geng, Ana Paula Kirchheim, Paulo J. M. Monteiro
Publikováno v:
Materials, Vol 9, Iss 9, p 745 (2016)
This paper shows the microstructural differences and phase characterization of pure phases and hydrated products of the cubic and orthorhombic (Na-doped) polymorphs of tricalcium aluminate (C3A), which are commonly found in traditional Portland cemen
Externí odkaz:
https://doaj.org/article/036fc28ff2474e509cf248ff9941b199
Multi-scale study of high-strength low-thermal-conductivity cement composites containing cenospheres
Autor:
Laura De Lorenzis, Peter Wriggers, Kemal Celik, Vanessa Rheinheimer, Min-Hong Zhang, Yunpeng Wu, Jun-Yan Wang, T. Wu, Paulo J.M. Monteiro
Publikováno v:
Cement and Concrete Composites. 80:91-103
Cenosphere particles are hollow, but due to their hard shells, they can be used in cementitious composites to produce ultra-lightweight cement composites (ULCC) with high strength and low thermal conductivity. This study integrates thermal conductivi
Publikováno v:
The Journal of Engineering (2017)
In many planar antenna array designs, impedance transformers are required to interconnect the elements to ensure that their impedances are matched. However, impedance transformers take up space and reduce area utilisation. If each element is electric
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
Scientific Reports
Scientific Reports
Small resonator antennas, such as metaresonator antennas, have narrow bandwidths, which limits their effective range of frequencies. When they are used as embedded antennas in building materials, their performance is affected more than other types of
Publikováno v:
Construction and Building Materials. 84:320-330
This research compares the degree of carbonation and water absorption of concretes with white cement versus ordinary Portland cement. For this, four types of white concrete (WPC1–4), ordinary Portland concrete (OPC) as control, and three water/ceme
Publikováno v:
Thin Film Processes-Artifacts on Surface Phenomena and Technological Facets
Recercat. Dipósit de la Recerca de Catalunya
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Recercat. Dipósit de la Recerca de Catalunya
instname
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Many efforts have been made over the last decades to improve and develop new technologies for cement and chemical industries that can provide materials that are more durable and cost efficient, stronger and less environmentally harmful. Studies at sm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8322ca4eeee3263e7b3273fe0a535f0
https://doi.org/10.5772/66665
https://doi.org/10.5772/66665
Autor:
Minghui Liu, Paulo J.M. Monteiro, Min-Hong Zhang, Liya E. Yu, Pierre-Adrien Itty, Padmaja Krishnan, Vanessa Rheinheimer, Zhi Liu
Publikováno v:
Scientific reports, vol 7, iss 1
Consecutive eight study phases under the successive presence and absence of UV irradiation, water vapor, and oxygen were conducted to characterize surface changes in the photocatalytic TiO2 powder using near-ambient-pressure X-ray photoelectron spect