Plasma discharges inside water have been widely used for pulsed power applications such as water ... more Plasma discharges inside water have been widely used for pulsed power applications such as water high voltage lines and switches. More recently underwater plasma discharges have been proved to be very efficient as an advanced oxidations process. The plasma inside water is ...
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 1996
... These pillars are moreoverdisjoined from the room floor and rest directly on theground. ... a... more ... These pillars are moreoverdisjoined from the room floor and rest directly on theground. ... avoid-ed, decreasing in this way the pile-up effects and increas-ing thereby the maximum acquisition rate.References[l] D. Bollini, F. Cervellera, GP Egeni, P. Mazzoldi, G.Moschini, R Rossi ...
The thermal alteration of hybrid polydimethylsiloxane-titania nanometer sized composites (nanocom... more The thermal alteration of hybrid polydimethylsiloxane-titania nanometer sized composites (nanocomposites) has been studied up to 1600°C to determine the changes of the silicon oxycarbide phase as a function of temperature and titania content. The samples were prepared by the sol-gel method starting from molecular precursors, diethoxydimethylsilane and titanium isopropoxide. The starting xerogels were treated under argon atmosphere and their phase changes were observed by thermal analyses, infrared spectroscopy, and X-ray diffraction. Between 500 and 800°C the polymer-to-ceramic conversion takes place for all samples with the formation of differing oxycarbide phases, whose structures depend on the titania content. At 1000°C two main phases are present, which we describe as silicon oxycarbide and titanium oxycarbide phases. Their change with increasing temperature has been followed using quantitative X-ray diffraction analyses, using a modified Rietveld method. Under the assumption that a crystalline phase with periodic order comparable with the unit cell lengths could fit an amorphous phase, a simplified silica structure has been used for the refinement of the silicon-derived phase. This novel approach has been used here to describe the structural changes of the amorphous silicon oxycarbide phase during the pyrolysis process and as a function of Ti content by measuring the changes of the cell parameter a.
Aspect Oriented Programming (AOP) constructs introduce new kinds of relationships among tradition... more Aspect Oriented Programming (AOP) constructs introduce new kinds of relationships among traditional units, e.g. classes in Object Oriented (OO) code, and aspects due to the weaving among aspects’ code fragments, such as advice or inter-type declarations, and the traditional system units. These relationships can be difficult to identify making hard and risky the maintenance operations because the impact of a change could be very difficult to evaluate. New methods, techniques and tools (or the adaptation of the existing ones) are needed to successfully face and overcome the new problems and difficulties that AOP constructs could pose to code maintenance. This workshop intends to act as a forum for the presentation and discussion of new approaches to effectively support the maintenance of AO systems, and to promote joint researches and experimental studies about this topic.
Research on the focus of attention has begun exploring the physiological changes that underlie th... more Research on the focus of attention has begun exploring the physiological changes that underlie the difference between internal and external foci of attention. However, previous electromyography studies have used dynamic tasks, making it difficult to interpret electrophysiological data. The authors analyzed how the focus of attention affects a subject's ability to perform an isometric force production task (focus was directed either at the force platform or the muscles responsible for force production). Subjects received practice without attentional focus instructions and then completed blocks of trials with an external and internal attentional focus separately. An external focus led to significantly less error overall and reduced surface electromyography activity with lower median power frequencies in the antagonist muscle, but attentional focus had no effects on the agonist muscle. Thus, an external focus of attention led to more efficient motor unit recruitment patterns (reduced cocontraction) and improved performance. Posttest surveys revealed subjects were aware of their improved performance with an external focus.
In Object Oriented (OO) systems super-imposition is a way to implement crosscutting concerns that... more In Object Oriented (OO) systems super-imposition is a way to implement crosscutting concerns that introduce scattering and tangling of code components among the Types implemented along Type Hierarchies. This paper presents the results of the analysis of a set of existing Java systems to confirm and verify this assumption. The analysis was carried out exploiting a method to automatically analyse and identify the Type Fragments implementing static crosscutting concerns in OO systems.
A modi®ed processing route, which is based on the active ®ller controlled pyrolysis technique, wa... more A modi®ed processing route, which is based on the active ®ller controlled pyrolysis technique, was followed here to form a homogeneous mullite-SiC nanocomposite. An Al 2 O 3 -®lled polymethylsiloxane was prepared by the in-situ formation of the SiCO network via a sol-gel process. The ®lled gels obtained in this way show an excellent machinability with conventional surface grinding techniques. Heat treatment up to 1500 C initiated crystallization of mullite, which showed intragranular SiC precipitation. Based on microstructure characterization in conjunction with thermal analysis, a formation mechanism is proposed which includes the glass transition temperature of SiCO as well as its phase sparation into SiO 2 plus nanosized SiC crystallites, giving rise to this new mullite-SiC nanocomposite. #
To meet stakeholder non-technical background, requirements are often presented by analysts in ter... more To meet stakeholder non-technical background, requirements are often presented by analysts in terms of scenarios. While translating requirements into scenarios, details and over-specifications (called Ahab's Legs) need to be added to make requirements concrete and understandable to stakeholders. Despite the expected benefits that they should convey, Ahab's Legs could disturb the requirement validation session. They can, in fact, distract the attention of stakeholders. Valuable discussion time may be wasted when focusing on irrelevant details rather than on the actually relevant ones. In the present paper, we address the Ahab's Leg dilemma and its potential impact on requirement validation sessions. We discuss how to measure the distraction due to Ahab's Legs and what are the possible approaches an analyst can adopt to limit it. Moreover, we present the design of a controlled experiment devoted to measure the impact of Ahab's Legs on requirement validation sessions. In particular, the experiment is meant to (1) estimate the magnitude of the distracting effect, and to (2) assess one of the most promising way to alleviate their negative effect, i.e. by making stakeholder aware of the Ahab's Legs before the validation session.
Plasma discharges inside water have been widely used for pulsed power applications such as water ... more Plasma discharges inside water have been widely used for pulsed power applications such as water high voltage lines and switches. More recently underwater plasma discharges have been proved to be very efficient as an advanced oxidations process. The plasma inside water is ...
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 1996
... These pillars are moreoverdisjoined from the room floor and rest directly on theground. ... a... more ... These pillars are moreoverdisjoined from the room floor and rest directly on theground. ... avoid-ed, decreasing in this way the pile-up effects and increas-ing thereby the maximum acquisition rate.References[l] D. Bollini, F. Cervellera, GP Egeni, P. Mazzoldi, G.Moschini, R Rossi ...
The thermal alteration of hybrid polydimethylsiloxane-titania nanometer sized composites (nanocom... more The thermal alteration of hybrid polydimethylsiloxane-titania nanometer sized composites (nanocomposites) has been studied up to 1600°C to determine the changes of the silicon oxycarbide phase as a function of temperature and titania content. The samples were prepared by the sol-gel method starting from molecular precursors, diethoxydimethylsilane and titanium isopropoxide. The starting xerogels were treated under argon atmosphere and their phase changes were observed by thermal analyses, infrared spectroscopy, and X-ray diffraction. Between 500 and 800°C the polymer-to-ceramic conversion takes place for all samples with the formation of differing oxycarbide phases, whose structures depend on the titania content. At 1000°C two main phases are present, which we describe as silicon oxycarbide and titanium oxycarbide phases. Their change with increasing temperature has been followed using quantitative X-ray diffraction analyses, using a modified Rietveld method. Under the assumption that a crystalline phase with periodic order comparable with the unit cell lengths could fit an amorphous phase, a simplified silica structure has been used for the refinement of the silicon-derived phase. This novel approach has been used here to describe the structural changes of the amorphous silicon oxycarbide phase during the pyrolysis process and as a function of Ti content by measuring the changes of the cell parameter a.
Aspect Oriented Programming (AOP) constructs introduce new kinds of relationships among tradition... more Aspect Oriented Programming (AOP) constructs introduce new kinds of relationships among traditional units, e.g. classes in Object Oriented (OO) code, and aspects due to the weaving among aspects’ code fragments, such as advice or inter-type declarations, and the traditional system units. These relationships can be difficult to identify making hard and risky the maintenance operations because the impact of a change could be very difficult to evaluate. New methods, techniques and tools (or the adaptation of the existing ones) are needed to successfully face and overcome the new problems and difficulties that AOP constructs could pose to code maintenance. This workshop intends to act as a forum for the presentation and discussion of new approaches to effectively support the maintenance of AO systems, and to promote joint researches and experimental studies about this topic.
Research on the focus of attention has begun exploring the physiological changes that underlie th... more Research on the focus of attention has begun exploring the physiological changes that underlie the difference between internal and external foci of attention. However, previous electromyography studies have used dynamic tasks, making it difficult to interpret electrophysiological data. The authors analyzed how the focus of attention affects a subject's ability to perform an isometric force production task (focus was directed either at the force platform or the muscles responsible for force production). Subjects received practice without attentional focus instructions and then completed blocks of trials with an external and internal attentional focus separately. An external focus led to significantly less error overall and reduced surface electromyography activity with lower median power frequencies in the antagonist muscle, but attentional focus had no effects on the agonist muscle. Thus, an external focus of attention led to more efficient motor unit recruitment patterns (reduced cocontraction) and improved performance. Posttest surveys revealed subjects were aware of their improved performance with an external focus.
In Object Oriented (OO) systems super-imposition is a way to implement crosscutting concerns that... more In Object Oriented (OO) systems super-imposition is a way to implement crosscutting concerns that introduce scattering and tangling of code components among the Types implemented along Type Hierarchies. This paper presents the results of the analysis of a set of existing Java systems to confirm and verify this assumption. The analysis was carried out exploiting a method to automatically analyse and identify the Type Fragments implementing static crosscutting concerns in OO systems.
A modi®ed processing route, which is based on the active ®ller controlled pyrolysis technique, wa... more A modi®ed processing route, which is based on the active ®ller controlled pyrolysis technique, was followed here to form a homogeneous mullite-SiC nanocomposite. An Al 2 O 3 -®lled polymethylsiloxane was prepared by the in-situ formation of the SiCO network via a sol-gel process. The ®lled gels obtained in this way show an excellent machinability with conventional surface grinding techniques. Heat treatment up to 1500 C initiated crystallization of mullite, which showed intragranular SiC precipitation. Based on microstructure characterization in conjunction with thermal analysis, a formation mechanism is proposed which includes the glass transition temperature of SiCO as well as its phase sparation into SiO 2 plus nanosized SiC crystallites, giving rise to this new mullite-SiC nanocomposite. #
To meet stakeholder non-technical background, requirements are often presented by analysts in ter... more To meet stakeholder non-technical background, requirements are often presented by analysts in terms of scenarios. While translating requirements into scenarios, details and over-specifications (called Ahab's Legs) need to be added to make requirements concrete and understandable to stakeholders. Despite the expected benefits that they should convey, Ahab's Legs could disturb the requirement validation session. They can, in fact, distract the attention of stakeholders. Valuable discussion time may be wasted when focusing on irrelevant details rather than on the actually relevant ones. In the present paper, we address the Ahab's Leg dilemma and its potential impact on requirement validation sessions. We discuss how to measure the distraction due to Ahab's Legs and what are the possible approaches an analyst can adopt to limit it. Moreover, we present the design of a controlled experiment devoted to measure the impact of Ahab's Legs on requirement validation sessions. In particular, the experiment is meant to (1) estimate the magnitude of the distracting effect, and to (2) assess one of the most promising way to alleviate their negative effect, i.e. by making stakeholder aware of the Ahab's Legs before the validation session.
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Papers by Lucas Ceccato