The Raman coupling function in amorphous silica and the nature of the long wavelength excitations in disordered systems

New Raman and incoherent neutron scattering data at various temperatures and molecular dynamic simulations in amorphous silica, are compared to obtain the Raman coupling coefficient $C(\omega)$ and, in particular, its low frequency limit. This study indicates that in the $\omega \to 0$ limit $C(\omega)$ extrapolates to a non vanishing value, giving important indications on the characteristics of the vibrational modes in disordered materials; in particular our results indicate that even in the limit of very long wavelength the local disorder implies non-regular local atomic displacements.Comment: Revtex, 4 ps figure

Sustainable design approaches towards green higher education campus

The primary goal of our work is to address the issues concerning the application of sustainability concepts in the Higher Education Campus of the Faculty of Architecture at Universidade de Lisboa. Sustainable actions and attitudes are part of the sustainable principles of the Sustainable Development Goals adopted in the 2030 Agenda by all United Nations member states. This exploratory research is based on a review of the international literature specialising in sustainability assessment in Higher Education Institutions. A qualitative research approach was applied, using a questionnaire adapted from the European University Association in 2021, as a research instrument to know the perception and opinion of the Faculty of Architecture (FA) academic community on some of the collective actions of greening. A qualitative interpretation and discussion of the obtained data were performed based on a survey conducted on a non-probabilistic sample selected from Campus users. With this investigation, we intend to know the challenges and initiatives practised on this Campus in defence of sustainability and contribute towards a changeover in the environmental, social, and economic awareness of the campus community.info:eu-repo/semantics/publishedVersio

New skills for new designers: Fashion and textiles

This paper is the first part of a research work on new skills for designers and creative industries stakeholders, which aims to identify, organize and promote an updated professional mindset among FAUL students. Through the literature review and the implementation of specific questionnaires to the fashion students, teachers and practitioners, it was intended to draw a current view of the skill set needed to work in fashion design. This questionnaire was adapted from the one used in the O*NET Data Collection Program, considering the particular needs and representing the particular domain of education and training we are studying. The results of this study will serve as the structural basis for the design of new curricula that better respond to the needs of graduate students of the Fashion Design Course at the Faculty of Architecture of Lisbon - University of Lisbon, when they enter the job market.info:eu-repo/semantics/publishedVersio

Pricing financial derivatives with neural networks

Abstract Neural network algorithms are applied to the problem of option pricing and adopted to simulate the nonlinear behavior of such financial derivatives. Two different kinds of neural networks, i.e. multi-layer perceptrons and radial basis functions, are used and their performances compared in detail. The analysis is carried out both for standard European options and American ones, including evaluation of the Greek letters, necessary for hedging purposes. Detailed numerical investigation show that, after a careful phase of training, neural networks are able to predict the value of options and Greek letters with high accuracy and competitive computational time

Z' Physics

The limits on extra neutral gauge bosons, which could be reached at LEP2, are reviewed. Exclusion and discovery limits are discussed for f\bar f and WW production.Comment: 20 pages Latex, 7 figures included by epsfig, Contribution to the Proceedings the workshop "Physics at LEP2", Geneva, 199

Biosignal monitoring implemented in a swimsuit for athlete performance evaluation

Monitor athletes during exercise has always been a major challenge for engineers and researchers due to the restrictions involving the measurement of physiological and performance parameters. An athlete should have complete freedom to perform his normal activity, in order to be correctly monitored. The advent of e-textiles can give an important contribution to overcome these limitations since it is possible to integrate sensors in garments and thus perform monitoring without limiting the freedom of movements. This paper presents part of the work that is being carried out in the project entitled BIOSWIM, which envisions the development of an instrumented swimsuit, capable of acquiring several physiological and performance related signals with the purpose of aiding the trainer in improving the technical component of the swimmer and improve his performance. This paper will give an overview of the monitoring system and the textile sensors that were developed, namely for biopotential measurement.Fundação para a Ciência e a Tecnologia (FCT) - projeto Bioswim (PTDC/EEAELC/70803/2006

Frustration and sound attenuation in structural glasses

Three classes of harmonic disorder systems (Lennard-Jones like glasses, percolators above threshold, and spring disordered lattices) have been numerically investigated in order to clarify the effect of different types of disorder on the mechanism of high frequency sound attenuation. We introduce the concept of frustration in structural glasses as a measure of the internal stress, and find a strong correlation between the degree of frustration and the exponent alpha that characterizes the momentum dependence of the sound attenuation $Gamma(Q)$$\simeq$$Q^\alpha$. In particular, alpha decreases from about d+1 in low-frustration systems (where d is the spectral dimension), to about 2 for high frustration systems like the realistic glasses examined.Comment: Revtex, 4 pages including 4 figure

Design and business: growing up as a separate couple

This paper addresses the difficulties faced by postgraduate design students (DS) and professional designers (PD) concerning the design, development and implementation of business projects (BP), and of sustainable management (SM). The DS have not previously attended any specific course, either dealing with BP, or having had training in SM. A test administered to 60 DS enabled to picture issues regarding: (i) the sense of discomfort regarding business and management areas, due to lack of skills, and (ii) the special requirements for skills in unfamiliar areas such as production, management, marketing and product stewardship. The study determined that DS perceive the need for educational policies that allow the acquisition of new skills in the referred areas. However, it seems that they are not sensitive to BP/SM scientific’ research importance. Findings point out a direction to curriculum development to bridge Design and Business areas, by overcoming the identified gap.info:eu-repo/semantics/acceptedVersio

Precision Physics at LEP

1 - Introduction 2 - Small-Angle Bhabha Scattering and the Luminosity Measurement 3 - Z^0 Physics 4 - Fits to Precision Data 5 - Physics at LEP2 6 - ConclusionsComment: Review paper to appear in the RIVISTA DEL NUOVO CIMENTO; 160 pages, LateX, 70 eps figures include