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  • 1
    Electronic Resource
    Electronic Resource
    Intrarenal arteriosclerosis and impairment of kidney function in NIDDM subjects (1998)
    Springer
    Diabetologia 41 (1998), S. 121-124 
    Details
    ISSN: 1432-0428
    Keywords: Keywords Non-insulin-dependent diabetes mellitus ; duplex Doppler ultrasonography ; kidney ; arteriosclerosis ; albuminuria.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary It is currently under debate whether the pathogenesis of end-stage renal failure in non-insulin-dependent diabetes mellitus (NIDDM) is a consequence of microangiopathy alone. The aim of this study was to investigate intrarenal arteriosclerosis and its correlation with kidney function in NIDDM. In 36 diabetic subjects, and in 10 age- and sex-matched healthy control subjects we measured kidney volume and resistive index of the interlobar arteries by duplex Doppler ultrasonography. Clinical and metabolic parameters, renal function and vascular sequelae of the disease were also evaluated. In diabetic subjects resistive index (median 0.72, range 0.54–0.79) was higher than in control subjects (median 0.62, range 0.57–0.66) (2p 〈 0.002). Kidney volume and resistive index correlated with age (p 〈 0.004), body mass index (p 〈 0.001), mean blood pressure (p 〈 0.001), total and LDL cholesterol (p 〈 0.01) and creatinine clearance (p 〈 0.001 and 〈 0.01, respectively). Kidney volume also correlated with HbA1 (p 〈 0.01) and resistive index with uric acid (p 〈 0.01). Lower body macroangiopathy was associated with increased resistive index and reduced kidney volume (2p 〈 0.05), while upper body macroangiopathy and microangiopathy were not. Our data suggest that macroangiopathy rather than microangiopathy is mainly responsible for impairment of kidney function in NIDDM. The resistive index of interlobar arteries seems to be a reliable marker of intrarenal arteriosclerosis and can be used as a non-invasive, easily available parameter of its evolution. [Diabetologia (1998) 41: 121–124]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001250050877
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  • 2
    Electronic Resource
    Electronic Resource
    Identification and simulation of a circuit-based model of magnetic hysteresis (2005)
    Bradford : Emerald
    Compel 24 (2005), S. 534-545 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Purpose - The scope of the work is to provide an identification procedure for an hysteresis model based on nonlinear circuit cells. Design/methodology/approach - An identification procedure for an hysteresis model based on nonlinear circuit cells is presented. The response of elementary cell is equal to a generalized play operator. The procedure allows the identification of the limit symmetric hysteresis loop and of minor loops. The identification procedure is based on the relationship between the circuit parameters and the discretization of the first derivative of the BH curve by means of a staircase function. Findings - The model obtained is employed for the simulation of soft magnetic composite material cores under different supply voltage waveforms. The proposed identification procedure is able to define an accurate model of an hysteretic material with a low number of elemental network cells. The identification algorithm is simple and makes use of the limit hysteresis cycle only. Symmetric minor loops are used to tune "soft" operators for the correct reconstruction of cycles which do not reach saturation. Research limitations/implications - The model is limited to scalar and static hysteresis model. Practical implications - The model obtained can be used in network simulator like SPICE in order to model circuits in which magnetic devices are involved. Originality/value - The circuit hysteresis model has been presented in literature, while its identification is newly proposed by the authors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640510586150
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic modelling and magneto-hydro-dynamic simulations of an aluminium production electrolytic cell (1999)
    Bradford : Emerald
    Compel 18 (1999), S. 528-538 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: A simulation of the motion of molten aluminium inside an electrolytic cell is presented. Since the driving term of the aluminium motion is the Lorentz (j × B) body force acting within the fluid,this problem involves the solution of the magneto-hydro-dynamic equations. Different solver modules for the magnetic field computation and for the fluid motion simulation are coupled together. The interactions of all these are presented and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321649910275224
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  • 4
    Electronic Resource
    Electronic Resource
    Analytical and finite element design optimisation of a tubular linear IPM motor (2001)
    Bradford : Emerald
    Compel 20 (2001), S. 777-795 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: The optimisation of a tubular linear motor with interior permanent magnets is described. For a rapid design the whole process is divided in three parts: an analytical approach for the a preliminary investigation, a parametric analysis by means of a finite element method and an optimisation. The obtained results show that the adopted optimisation process is efficient for rapid and effective optimisation of the tubular linear motor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640110393789
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  • 5
    Electronic Resource
    Electronic Resource
    Description of power lines by equivalent source system (2005)
    Bradford : Emerald
    Compel 24 (2005), S. 893-905 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Purpose - The definition of a simple model of low frequency magnetic field created by power industrial installations can be approached by using an equivalent source system (ESS). Given a set of measured magnetic field points, the ESS, made by a limited set of current carrying wires or turns, must be placed and supplied in order to fit the measured magnetic field values. An optimisation procedure can be used to define the current values and the location of the ESS which minimize the error between the measured and computed magnetic field values. Design/methodology/approach - A two-step optimal procedure is defined: in the outer step a stochastic optimisation routine is used to drive the geometric control parameters of the ESS while, in the inner step, the current values flowing through the sources are computed to find the minimization of the error with respect to a set of measured magnetic field values. The optimisation procedure is based on an artificial immune system algorithm which focuses on a deep exploration of the search space and gave interesting results both in terms of accuracy and computational efficiency. Findings - The results show that the proposed approach is able to reconstruct the magnetic field created by complex source system and give some accuracy measure on the reconstruction error. The optimisation process carried out also on conductor positions has allowed to find out the location of the real sources in an accurate way, also in presence of measurement errors. Originality/value - The approach proposed uses optimisation procedures to solve the inverse problem of source reconstruction starting by a set of measured magnetic field values. The definition of a simple equivalent source structure, together with an optimisation procedure to set its control parameters, allows to simulate complex magnetic field sources, like power substations or cable systems, in a very efficient and compact way.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640510598210
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  • 6
    Electronic Resource
    Electronic Resource
    An integral approach based on dual discretization and method of moment for the solution of static electric field (2005)
    Bradford : Emerald
    Compel 24 (2005), S. 446-457 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Purpose - The scope of the work is to provide an hybrid numerical technique for the solution of electric field. Design/methodology/approach - In this paper an integral approach for the solution of static electric field based on a dual discretization (DD) and on a surface method of moment (MoM) is presented. The proposed technique is applied to the solution of 3D electric field problems where different perfectly conducting bodies are placed in a homogeneous and isotropic medium. The approach is also extended to the analysis of static current field. In the presented formulation MoM is applied on a surface domain which is discretized according to a baricentrical dual scheme. Findings - The procedure has been applied to several practical cases and it represents an efficient tool for the evaluation of lumped circuit parameters as capacitances of 3D conducting bodies and ground resistance of grounding systems. Research limitations/implications - The formulation presented in the paper is limited to the calculus of electric field in homogeneous media. For future development the authors are working in order to include non-homogeneous media. Practical implications - The proposed approach aids the designer of electrical systems as large scale grounding systems or integrated circuit connections in the calculations of lumped electrical parameters. Originality/value - The originality of the paper lies in the coupling of MoM with finite formulation and DD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640510586088
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  • 7
    Electronic Resource
    Electronic Resource
    Hybrid method coupling AIS and zeroth order deterministic search (2005)
    Bradford : Emerald
    Compel 24 (2005), S. 784-795 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Purpose - The paper presents an hybrid optimization technique which couples the artificial immune system (AIS) algorithm with a zeroth order deterministic method. Design/methodology/approach - AIS has been developed to tackle multi-modal optimization problems and it has shown a great ability to explore the objective function space. The algorithm is subdivided into two phases: an outer and an inner cycle. The outer cycle is devoted to the exploration of the space while the inner is a local exploration of the objective function. The new hybrid method proposes to replace the local search by a zeroth order deterministic search to speed up the overall convergence. Findings - Results on two multi-modal analytical objective functions show an increase of speed of the new procedure with respect to the standard AIS. The method is also tested on the TEAM 22 numerical problem and some a posteriori techniques for the analysis of multimodal blind objective functions are discussed. Originality/value - The new Multimodal optimization algorithm has allowed to explore thoroughly feasibility space giving rise to a partition of the whole space, the use of hybrid technique increases the performances of standard AIS increasing the convergence to the optimal points.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640510598139
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  • 8
    Electronic Resource
    Electronic Resource
    Type 2 Vasopressin Receptor Gene, the Gene Responsible for Nephrogenic Diabetes Insipidus, Maps to XQ28 Close to the L1CAM Gene
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 193 (1993), S. 864-871 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/bbrc.1993.1705
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  • 9
    Electronic Resource
    Electronic Resource
    The Exon-Intron Organization of the Human X-Linked Gene (FLN1) Encoding Actin-Binding Protein 280
    Amsterdam : Elsevier
    Genomics 21 (1994), S. 71-76 
    Details
    ISSN: 0888-7543
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/geno.1994.1226
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  • 10
    Electronic Resource
    Electronic Resource
    Isolation of a zinc finger motif (ZNF75) mapping on chromosome Xq26
    Amsterdam : Elsevier
    Genomics 13 (1992), S. 1231-1236 
    Details
    ISSN: 0888-7543
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0888-7543(92)90040-Y
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