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Your search keyword '"Martinez, Roberto"' showing total 701 results
Start Over Author "Martinez, Roberto" Publication Type Academic Journals
701 results on '"Martinez, Roberto"'

23. A data-driven model for the analysis of energy consumption in buildings

Author

Borgato Nicola, Prataviera Enrico, Bordignon Sara, Garay-Martinez Roberto, and Zarrella Angelo

Subjects
Environmental sciences, GE1-350
Abstract

Data-driven models are gaining traction in Building Energy Simulation, driven by the increasing role of smart metering and control in buildings. This paper aims to enhance the knowledge in this sector by introducing a practical method to analyse heating consumption. The methodology involves the analysis of hourly total heating demand and outdoor temperature measurements to create and calibrate Energy Signature Curves. Importantly, the building Energy Signature Curve is calibrated independently for each daily hour, resulting in a subset of 24 data-driven models. After calibration, a disaggregation algorithm is proposed to distinguish space heating from domestic hot water usage. The method also evaluates the building’s thermal inertia, examining the correlation between the hourly global energy consumption and the outdoor air temperature moving average. It also presents a methodology for improving the DHW heat consumption model. The methodology is applied to a case study of 51 buildings in Tartu, Estonia, with complete yearly demand measurements from the district heating operator. Thanks to the hourly calibration approach, R2 is 0.05 higher on average than the yearly Energy Signature Curve approach. The difference between estimated and measured annual energy consumption is 8% on average, demonstrating the practicality and effectiveness of the proposed method.

Published
2024
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30. Contemporary Research and Debated Issues on John the Baptist.

Author

Martinez, Roberto

Subjects
*SCHOLARLY method, *ESCHATOLOGY, *PREACHING
Abstract

This article surveys recent studies about John the Baptist, focusing on disputed issues in contemporary research about this historical figure. After briefly reviewing the history of research as a framework for this survey, a presentation of the major contributions on John during the last decades follows. The article then reports on the status quaestionis of some still debated subjects related to the Baptist, such as the content of his message, portrayal as Elijah, relationship to Jesus, baptism, the account in Josephus, association with the Essenes/Qumran, and other minor matters. The work concludes by assessing what the author considers the most important research shifts and contributions of studies on John the Baptist in recent scholarship. [ABSTRACT FROM AUTHOR]

Published
2024
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32. Acoustic response of structured and randomized porous blunt trailing edges subject to turbulent boundary layers.

Author

Arcondoulis, Elias J. G., Ragni, Daniele, Fiscaletti, Daniele, Merino-Martinez, Roberto, and Liu, Yu

Subjects
TURBULENT boundary layer, NOISE control, POROUS materials, ACOUSTIC radiators, FLOW velocity
Abstract

The attachment of porous media to a blunt trailing edge (TE) can significantly suppress vortex shedding processes and the related tonal noise, yet the near-wall and internal flow fields of porous media are difficult to analyze experimentally and rely on numerical simulations to elucidate the internal flow features. A structured porous trailing edge (SPTE) has been recently designed that follows a methodology of a structured porous coated cylinder. The SPTE acoustic response was compared against randomized porous media with 10 and 30 pores/in. in an anechoic wind tunnel over a range of flow velocities. Acoustic beamforming revealed that the dominant acoustic sources were at the end of the solid plate, even when a porous TE was attached. A region of integration was used to extract acoustic spectra without additional noise sources, revealing that the SPTE possesses superior noise reduction capability. Dipolar directivity patterns were observed at the vortex shedding frequency for each TE, and the coherence between microphones revealed the complex acoustic propagation of the high-frequency content. A wavelet analysis revealed how the SPTE breaks periodic vortex shedding cycles into smaller cycles over a wider frequency range, leading to an overall noise reduction relative to the other TEs. [ABSTRACT FROM AUTHOR]

Published
2024
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43. Stereotactic radiosurgery for vestibular schwannoma: International Stereotactic Radiosurgery Society (ISRS) Practice Guideline.

Author

Tsao, May N, Sahgal, Arjun, Xu, Wei, De Salles, Antonio, Hayashi, Motohiro, Levivier, Marc, Ma, Lijun, Martinez, Roberto, Régis, Jean, Ryu, Sam, Slotman, Ben J, and Paddick, Ian

Subjects
acoustic, neuroma, schwannoma, systematic review, vestibular, Cancer, Neurosciences
Abstract

ObjectivesThe aim of this systematic review was to develop International Stereotactic Radiosurgery Society (ISRS) consensus guideline statements for vestibular schwannoma.MethodsA systematic review of the literature was performed up to April 2015.ResultsA total of 55 full-text articles were included in the analysis. All studies were retrospective, except for 2 prospective quality of life studies. Five-year tumour control rates with Gamma Knife radiosurgery (RS), single fraction linac RS, or fractionated (either hypofractionated or conventional fractionation) stereotactic radiation therapy (FSRT) were similar at 81-100%. The single fraction RS series (linac or Gamma Knife) with tumour marginal doses between 12 and 14 Gy revealed 5-year tumour control rates of 90-99%, hearing preservation rates of 41-79%, facial nerve preservation rates of 95-100% and trigeminal preservation rates of 79-99%.There were 6 non-randomized studies comparing single fraction RS versus FSRT. There was no statistically significant difference in tumour control; HR=1.66 (95% CI 0.81, 3.42), p =0.17, facial nerve function; HR = 0.67 (95% CI 0.30, 1.49), p =0.33, trigeminal nerve function; HR = 0.80 (95% CI 0.41, 1.56), p =0.51, and hearing preservation; HR = 1.10 (95% CI 0.72, 1.68), p =0.65 comparing single fraction RS with FSRT.Nine quality of life reports yielded conflicting results as to which modality (surgery, observation, or radiation) was associated with better quality of life outcomes.ConclusionsThere are no randomized trials to help guide management of patients with vestibular schwannoma. Within the limitations of the retrospective series, a number of consensus statements were made.

Published
2017

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