The Experts below are selected from a list of 80454 Experts worldwide ranked by ideXlab platform

Guido Mul - One of the best experts on this subject based on the ideXlab platform.

  • toward a physically Sound Structure activity relationship of tio2 based photocatalysts
    Journal of Physical Chemistry C, 2010
    Co-Authors: Joana T. Carneiro, Tom J. Savenije, Jacob A. Moulijn, Guido Mul
    Abstract:

    The morphological (analyzed by N2-Brunauer−Emmett−Teller, transmission electron microscopy, X-ray diffraction), surface chemical (analyzed by NH3-temperature programmed desorption), and opto-electronic properties (analyzed by time resolved microwave conductivity measurements (TRMC)) of nanoparticulate anatase TiO2 (Hombikat, Sachtleben) were modified by calcination at temperatures ranging from 200 to 800 °C. Upon calcination the primary particle size and the crystallinity increase, strongly influencing the performance in the degradation of methylene blue. It is striking that for the investigated set of samples the rate versus primary particle diameter goes through a minimum. This is explained by the equation of the kinetic rate constant, keff = k[OH][h+]; [OH] decreases continuously as a function of increasing particle size, which is overcompensated by a strong increase in [h+] for particle sizes above ∼15 nm. The latter is the result of an increasing crystal quality of the anatase phase induced by calcination, as derived from the TRMC measurements. Implications for the rational design of improved photocatalysts are discussed

  • Toward a Physically Sound Structure−Activity Relationship of TiO2-Based Photocatalysts
    The Journal of Physical Chemistry C, 2009
    Co-Authors: Joana T. Carneiro, Tom J. Savenije, Jacob A. Moulijn, Guido Mul
    Abstract:

    The morphological (analyzed by N2-Brunauer−Emmett−Teller, transmission electron microscopy, X-ray diffraction), surface chemical (analyzed by NH3-temperature programmed desorption), and opto-electronic properties (analyzed by time resolved microwave conductivity measurements (TRMC)) of nanoparticulate anatase TiO2 (Hombikat, Sachtleben) were modified by calcination at temperatures ranging from 200 to 800 °C. Upon calcination the primary particle size and the crystallinity increase, strongly influencing the performance in the degradation of methylene blue. It is striking that for the investigated set of samples the rate versus primary particle diameter goes through a minimum. This is explained by the equation of the kinetic rate constant, keff = k[OH][h+]; [OH] decreases continuously as a function of increasing particle size, which is overcompensated by a strong increase in [h+] for particle sizes above ∼15 nm. The latter is the result of an increasing crystal quality of the anatase phase induced by calcination, as derived from the TRMC measurements. Implications for the rational design of improved photocatalysts are discussed

Richard J S Wise - One of the best experts on this subject based on the ideXlab platform.

  • Lexical retrieval constrained by Sound Structure: The role of the left inferior frontal gyrus
    Brain and Language, 2005
    Co-Authors: David J Sharp, Anne Cutler, Sophie K. Scott, Richard J S Wise
    Abstract:

    Positron emission tomography was used to investigate two competing hypotheses about the role of the left inferior frontal gyrus (IFG) in word generation. One proposes a domain-specific organization, with neural activation dependent on the type of information being processed, i.e., surface Sound Structure or semantic. The other proposes a process-specific organization, with activation dependent on processing demands, such as the amount of selection needed to decide between competing lexical alternatives. In a novel word retrieval task, word reconstruction (WR), subjects generated real words from heard non-words by the substitution of either a vowel or consonant. Both types of lexical retrieval, informed by Sound Structure alone, produced activation within anterior and posterior left IFG regions. Within these regions there was greater activity for consonant WR, which is more difficult and imposes greater processing demands. These results support a process-specific organization of the anterior left IFG.

  • Going beyond the information given: a neural system supporting semantic interpretation.
    NeuroImage, 2003
    Co-Authors: Sophie K. Scott, Alexander P. Leff, Richard J S Wise
    Abstract:

    Relating the meaning of a word to the context in which it is encountered is central to comprehension. We investigated the neural basis of this process. Subjects made decisions based on a semantic property of single nouns. The lack of sentence context created ambiguity, as nouns may have several, unrelated semantic identities. Contrasted with unambiguous decisions about each noun’s Sound Structure, the semantic task resulted in activity in the left superior frontal gyrus (SFG), activity that was dependent on choice reaction time. This identified the left SFG as an executive component of a distributed cognitive system that relates a word’s meaning to its semantic context to facilitate comprehension.

Hemanshu R. Pota - One of the best experts on this subject based on the ideXlab platform.

  • The optimal placement of actuator and sensor for active noise control of Sound–Structure interaction systems
    Smart Materials and Structures, 2008
    Co-Authors: Suwit Pulthasthan, Hemanshu R. Pota
    Abstract:

    This paper presents new objective functions and a practical method for finding the optimal placement of actuator and sensor for a Sound?Structure interaction system. The developed method for optimal actuator and sensor positioning is based on an energy-based approach and model uncertainty. The optimal actuator and sensor location obtained is used to construct a feedback controller using a minimax LQG control design method for reducing acoustic potential energy caused by Structure-borne Sound inside the acoustic cavity. The experimental demonstration of the novel method presented in this paper attenuates structural vibration up to 17?dB over the entire frequency range of interest and the associated noise up to 10?dB without explicit knowledge of the acoustic model.

  • Acoustic noise reduction in Sound-Structure interaction system
    2004 43rd IEEE Conference on Decision and Control (CDC) (IEEE Cat. No.04CH37601), 2004
    Co-Authors: Hemanshu R. Pota, Suwit Pulthasthan, Ian R. Petersen
    Abstract:

    This paper presents the experimental results in the application of feedback control of acoustic noise in an cavity of timber with a flexible lid of an aluminium sheet. The cavity is considered as a Sound-Structure interaction system. The paper demonstrates a practical way to design a controller using minimax LQG methods. It is also shown that the proper choice of a weighting function is an important step in the controller design. The designed controller with low-order is not only robust to unmodeled dynamics and parametric uncertainties but also convenient to being output feedback with guaranteed stability. In addition, the interesting results can be further improved by proper selection of actuator and sensor placement.

Masahiko Sakai - One of the best experts on this subject based on the ideXlab platform.

  • Sound Structure preserving transformation for weakly left linear deterministic conditional term rewriting systems
    Electronic Proceedings in Theoretical Computer Science, 2017
    Co-Authors: Ryota Nakayama, Naoki Nishida, Masahiko Sakai
    Abstract:

    In this paper, we show that the SR transformation, a computationally equivalent transformation proposed by Serbanuta and Rosu, is a Sound Structure-preserving transformation for weakly-left-linear deterministic conditional term rewriting systems. More precisely, we show that every weakly-left-linear deterministic conditional term rewriting system can be converted to an equivalent weakly-left-linear and ultra-weakly-left-linear deterministic conditional term rewriting system and prove that the SR transformation is Sound for weakly-left-linear and ultra-weakly-left-linear deterministic conditional term rewriting systems. Here, Soundness for a conditional term rewriting system means that reduction of the transformed unconditional term rewriting system creates no undesired reduction sequence for the conditional system.

  • WPTE@FSCD - Sound Structure-Preserving Transformation for Weakly-Left-Linear Deterministic Conditional Term Rewriting Systems
    2016
    Co-Authors: Ryota Nakayama, Naoki Nishida, Masahiko Sakai
    Abstract:

    In this paper, we show that the SR transformation, a computationally equivalent transformation proposed by Serbanuta and Rosu, is a Sound Structure-preserving transformation for weakly-left-linear deterministic conditional term rewriting systems. More precisely, we show that every weakly-left-linear deterministic conditional term rewriting system can be converted to an equivalent weakly-left-linear and ultra-weakly-left-linear deterministic conditional term rewriting system and prove that the SR transformation is Sound for weakly-left-linear and ultra-weakly-left-linear deterministic conditional term rewriting systems. Here, Soundness for a conditional term rewriting system means that reduction of the transformed unconditional term rewriting system creates no undesired reduction sequence for the conditional system.

Joana T. Carneiro - One of the best experts on this subject based on the ideXlab platform.

  • toward a physically Sound Structure activity relationship of tio2 based photocatalysts
    Journal of Physical Chemistry C, 2010
    Co-Authors: Joana T. Carneiro, Tom J. Savenije, Jacob A. Moulijn, Guido Mul
    Abstract:

    The morphological (analyzed by N2-Brunauer−Emmett−Teller, transmission electron microscopy, X-ray diffraction), surface chemical (analyzed by NH3-temperature programmed desorption), and opto-electronic properties (analyzed by time resolved microwave conductivity measurements (TRMC)) of nanoparticulate anatase TiO2 (Hombikat, Sachtleben) were modified by calcination at temperatures ranging from 200 to 800 °C. Upon calcination the primary particle size and the crystallinity increase, strongly influencing the performance in the degradation of methylene blue. It is striking that for the investigated set of samples the rate versus primary particle diameter goes through a minimum. This is explained by the equation of the kinetic rate constant, keff = k[OH][h+]; [OH] decreases continuously as a function of increasing particle size, which is overcompensated by a strong increase in [h+] for particle sizes above ∼15 nm. The latter is the result of an increasing crystal quality of the anatase phase induced by calcination, as derived from the TRMC measurements. Implications for the rational design of improved photocatalysts are discussed

  • Toward a Physically Sound Structure−Activity Relationship of TiO2-Based Photocatalysts
    The Journal of Physical Chemistry C, 2009
    Co-Authors: Joana T. Carneiro, Tom J. Savenije, Jacob A. Moulijn, Guido Mul
    Abstract:

    The morphological (analyzed by N2-Brunauer−Emmett−Teller, transmission electron microscopy, X-ray diffraction), surface chemical (analyzed by NH3-temperature programmed desorption), and opto-electronic properties (analyzed by time resolved microwave conductivity measurements (TRMC)) of nanoparticulate anatase TiO2 (Hombikat, Sachtleben) were modified by calcination at temperatures ranging from 200 to 800 °C. Upon calcination the primary particle size and the crystallinity increase, strongly influencing the performance in the degradation of methylene blue. It is striking that for the investigated set of samples the rate versus primary particle diameter goes through a minimum. This is explained by the equation of the kinetic rate constant, keff = k[OH][h+]; [OH] decreases continuously as a function of increasing particle size, which is overcompensated by a strong increase in [h+] for particle sizes above ∼15 nm. The latter is the result of an increasing crystal quality of the anatase phase induced by calcination, as derived from the TRMC measurements. Implications for the rational design of improved photocatalysts are discussed