Multi-objective optimization models have been increasingly used as optimal decisions are searched in settings considering several conflicting objectives. In these cases compromises must be made and often a large numbe...
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Multi-objective optimization models have been increasingly used as optimal decisions are searched in settings considering several conflicting objectives. In these cases compromises must be made and often a large number of non-dominated optimal solutions exist. From these solutions decision-makers must find the preferred one. This is a difficult task both from a computational and cognitive point of views, as it requires several solutions to be obtained and compared. An interactive visualization tool for fully understanding the best trade-offs is therefore becoming increasingly important. This paper proposes visualization solutions, implemented in a tool, for aiding decision-makers in finding the preferred solution in multi-objective optimization problems.
Tasting Panels are used in Sensory Analysis in order to evaluate products according to the way they are perceived by human senses. In this context, the main job of a professional taster is to assess the sensorial char...
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Tasting Panels are used in Sensory Analysis in order to evaluate products according to the way they are perceived by human senses. In this context, the main job of a professional taster is to assess the sensorial characteristics of products, for example in the food industry. Evaluating the individual performance of the tasters is thus essential, so the results produced are as reliable as possible. The tasting process usually generates a large amount of data that is used in decisions about the products and can also be used to evaluate the tasters. The main objective of this work is to specify and conceptualize a Decision Support System (DSS) to help managing and handling the referred data. This is considered a valuable contribution, since there are no known technological decision tools to support the tasting process.
This work is devoted to analyse an impedance boundary-transmission problem for the Helmholtz equation originated by a problem of wave diffraction by an infinite strip with higher order imperfect boundary conditions. A...
This work is devoted to analyse an impedance boundary-transmission problem for the Helmholtz equation originated by a problem of wave diffraction by an infinite strip with higher order imperfect boundary conditions. A constructive approach of operator relations is built, which allows a transparent interpretation of the problem in an operator theory framework. In particular, different types of operator relations are exhibited for different types of operators acting between Lebesgue and Sobolev spaces on a finite interval and the positive half-line. All this has consequences in the understanding of the structure of this type of problems. In particular, a Fredholm characterization of the problem is obtained in terms of the initial space order *** the request of the author and the Proceedings Editor the above article has been replaced with a corrected version. The original PDF file supplied to AIP Publishing contained an error in the title of the article. The original title appeared as: "The Impedance Problem of Wave Diffraction by a trip with Higher Order Boundary Conditions." This article has been replaced and the title now appears correctly online. The corrected article was published on 8 November 2013.
In this work we present two generalizations (see the operators I0+α,ρ,σ and I−α,ρ,σ defined below) of the classical Liouville fractional integrals. We study their boundedness as operators mapping the space ℒv,r ...
In this work we present two generalizations (see the operators I0+α,ρ,σ and I−α,ρ,σ defined below) of the classical Liouville fractional integrals. We study their boundedness as operators mapping the space ℒv,r into the spaces Lv+2+Re(α)2−2Re(ρ),r and Lv+1+−Re(ρ),r . In the end, we will apply our generalization to some particular functions.
It is evident, that the properties of monogenic polynomials in (n + 1)-real variables significantly depend on the generators e1,e2,...,en of the underlying 2n-dimensional Clifford algebra Cℓ0,n over R and their intera...
It is evident, that the properties of monogenic polynomials in (n + 1)-real variables significantly depend on the generators e1,e2,...,en of the underlying 2n-dimensional Clifford algebra Cℓ0,n over R and their interactions under multiplication. The case of n = 3 is studied through the consideration of Pascal's tetrahedron with hypercomplex entries as special case of the general Pascal simplex for arbitrary n, which represents a useful geometric arrangement of all possible products. The different layers ℒk of Pascal's tetrahedron (or pyramid) are built by ordered symmetric products contained in the trinomial expansion of (e1+e2+e3)k,k = 0,1,... .
In continuation of [4], this paper discusses the quaternionic Zernike spherical polynomials (QZSPs), which refine and extend the Zernike polynomials or radial polynomials introduced in the early thirties by F. Zernike...
In continuation of [4], this paper discusses the quaternionic Zernike spherical polynomials (QZSPs), which refine and extend the Zernike polynomials or radial polynomials introduced in the early thirties by F. Zernike's Nobel prize. In particular, the underlying polynomials are of three real variables and take on values in the quaternions (identified with R4 ). QZSPs are complete and orthonormal in the unit ball. The representation of these functions are explicitly given, and a summary of their fundamental properties is also discussed. To the best of our knowledge, this does not appear to have been done in literature before.
In continuation of [3], this paper discusses the prolate spheroidal quaternionic wave signals (PSQWSs), which refine and extend the prolate spheroidal wave functions introduced in the early sixties by D. Slepian and H...
In continuation of [3], this paper discusses the prolate spheroidal quaternionic wave signals (PSQWSs), which refine and extend the prolate spheroidal wave functions introduced in the early sixties by D. Slepian and H.O. Pollak. The PSQWSs are ideally suited to study certain questions regarding the relationship between quaternionic functions and their Fourier transforms. The PSQWSs are orthogonal and complete over two different intervals: the space of square integrable functions over a finite interval and the three-dimensional Paley-Wiener space of bandlimited functions. No other system of classical generalized orthogonal functions is known to possess this unique property. We address all the above and explore some basic facts of the arising quaternionic function theory.
The stabilization of periodic control systems using time scales is studied. Time scale is a model of time. The language of time scales seems to be an ideal tool to unify the continuous-time and the discrete-time theor...
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S1 Health literacy and health education in adolescence Catarina Cardoso Tomás S2 The effect of a walking program on the quality of life and well-being of people with schizophrenia Emanuel Oliveira, D. Sousa, M. U...
S1 Health literacy and health education in adolescence Catarina Cardoso Tomás S2 The effect of a walking program on the quality of life and well-being of people with schizophrenia Emanuel Oliveira, D. Sousa, M. Uba-Chupel, G. Furtado, C. Rocha, A. Teixeira, P. Ferreira S3 Diagnosis and innovative treatments - the way to a better medical practice Celeste Alves S4 Simulation-based learning and how it is a high contribution Stefan Gisin S5 Formative research about acceptability, utilization and promotion of a home fortification programme with micronutrient powders (MNP) in the Autonomous Region of Príncipe, São Tomé and Príncipe Elisabete Catarino, Nelma Carvalho, Tiago Coucelo, Luís Bonfim, Carina Silva S6 Safety culture of the patient: a reflexion about the therapeutic approach on the patient with vocal pathology Débora Franco S7 About wine, fortune cookies and patient experience Jesús Alcoba González O1 The psychological impact on the emergency crews after the disaster event on February 20, 2010 Helena G. Jardim, Rita Silva O2 Musculoskeletal disorders in midwives Cristina L. Baixinho, Mª Helena Presado, Mª Fátima Marques, Mário E. Cardoso O3 Negative childhood experiences and fears of compassion: Implications for psychological difficulties in adolescence Marina Cunha, Joana Mendes, Ana Xavier, Ana Galhardo, Margarida Couto O4 Optimal age to give the first dose of measles vaccine in Portugal João G. Frade, Carla Nunes, João R. Mesquita, Maria S. Nascimento, Guilherme Gonçalves O5 Functional assessment of elderly in primary care Conceição Castro, Alice Mártires, Mª João Monteiro, Conceição Rainho O6 Smoking and coronary events in a population of Spanish health-care centre: An observational study Francisco P. Caballero, Fatima M. Monago, Jose T. Guerrero, Rocio M. Monago, Africa P. Trigo, Milagros L. Gutierrez, Gemma M. Milanés, Mercedes G. Reina, Ana G. Villanueva, Ana S. Piñero, Isabel R. Aliseda, Francisco B. Ramirez O7 Prevalence of musculoskeletal injuries in Por
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