Développement des méthodes de stabilisation pour la conception des circuits hyperfréquences : application à l'optimisation d'un amplificateur de puissance spatial

209 p. : graf.

Fertilidad, estudios metabólicos

En este trabajo me voy a centrar en la normalidad funcional y sobre todo, en las hormonas que intervienen en la fertilidad. Para ello, comenzaré explicando qué procesos generales se realizan para valorar la fertilidad, tanto masculina como femenina y después, me centraré en las hormonas que intervienen en la fertilidad, el tratamiento, consejos y por supuesto todo enfocado a la enfermería. CASTELLANO.

Domain walls collision in Fe-rich and Co-rich glass covered microwires

JEMS 2012 - Joint European Magnetic Symposia edited by Tiberto, P; Affronte, M; Casoli, F; Fernandez, CD; Gubbiotti, G; Marquina, C; Pratt, F; Solzi, M; Tacchi, S; Vavassori, P. 6th Joint European Magnetic Symposia (JEMS) Parma, ITALY SEP 09-14, 2012

Manipulation of domain wall dynamics in amorphous microwires through the magnetoelastic anisotropy

We studied the effect of magnetoelastic anisotropy on domain wall (DW) dynamics and remagnetization process of magnetically bistable Fe-Co-rich microwires with metallic nucleus diameters (from 1.4 to 22 mu m). We manipulated the magnetoelastic anisotropy applying the tensile stresses and changing the magnetostriction constant and strength of the internal stresses. Microwires of the same composition of metallic nucleus but with different geometries exhibit different magnetic field dependence of DW velocity with different slopes. Application of stresses resulted in decrease of the DW velocity, v, and DW mobility, S. Quite fast DW propagation (v until 2,500 m/s at H about 30 A/m) has been observed in low magnetostrictive magnetically bistable Co56Fe8Ni10Si10B16 microwires. Consequently, we observed certain correlation between the magnetoelastic energy and DW dynamics in microwires: decreasing the magnetoelastic energy, K (me), DW velocity increases.

Domain wall dynamics of magnetically bistable microwires

EMM-FM2011 – First Euro Mediterranean Meeting on Functionalized Materials, edited by Cheikhrouhou, A. 1st Euro Mediterranean Meeting on Functionalized Materials (EMM-FM). Sousse, TUNISIA . Sep. 06-10, 2011

The COMT Val158 Met polymorphism as an associated risk factor for Alzheimer disease and mild cognitive impairment in APOE 4 carriers

Background: The aim of this study is to examine the influence of the catechol-O-methyltranferase (COMT) gene (polymorphism Val158 Met) as a risk factor for Alzheimer's disease (AD) and mild cognitive impairment of amnesic type (MCI), and its synergistic effect with the apolipoprotein E gene (APOE). A total of 223 MCI patients, 345 AD and 253 healthy controls were analyzed. Clinical criteria and neuropsychological tests were used to establish diagnostic groups. The DNA Bank of the University of the Basque Country (UPV-EHU) (Spain) determined COMT Val158 Met and APOE genotypes using real time polymerase chain reaction (rtPCR) and polymerase chain reaction (PCR), and restriction fragment length polymorphism (RFLPs), respectively. Multinomial logistic regression models were used to determine the risk of AD and MCI. Results: Neither COMT alleles nor genotypes were independent risk factors for AD or MCI. The high activity genotypes (GG and AG) showed a synergistic effect with APOE epsilon 4 allele, increasing the risk of AD (OR = 5.96, 95% CI 2.74-12.94, p < 0.001 and OR = 6.71, 95% CI 3.36-13.41, p < 0.001 respectivily). In AD patients this effect was greater in women. In MCI patients such as synergistic effect was only found between AG and APOE epsilon 4 allele (OR = 3.21 95% CI 1.56-6.63, p = 0.02) and was greater in men (OR = 5.88 95% CI 1.69-20.42, p < 0.01). Conclusion: COMT (Val158 Met) polymorphism is not an independent risk factor for AD or MCI, but shows a synergistic effect with APOE epsilon 4 allele that proves greater in women with AD.

Estudio de la actividad aminopeptidásica en espermatozoides astenozoospérmicos : comparación clínica

249 p.: il., col.

Gizarte-elkarrekintza eta harreman beharrizanak irakaste-ikaste prozesuetan Haur Hezkuntzan

LABURPENA: Lan hau esku-hartzearen alorrean kokatzen da: harreman beharrizanen inguruko diagnostiko bat aurkezten da. Honen helburua da Haur Hezkuntzako 3 urteko gelan edukiak irakasteko eta ikasteko antolatzen den gizarte-elkarrekintzan agertzen diren harreman beharrizan motak eta horiek noraino eta nola betetzen diren ikustea. Esku-hartzea oinarritzen da orientabide soziokulturalaren konstruktibismoak gizarte-elkarrekintzari buruz egin duen lanean eta baita Garapenaren Psikologiak eta beste diziplina batzuk atxikimenduaz eta harreman afektiboei buruz aztertutakoan ere. Diagnostikoa egiteko prozedura etnografikoak erabili dira, garrantzitsuena behaketa parte-hartzailea. Ondorioetan nabarmenena da eduki eskolarren presioak maiz harreman beharrizanei ez erantzutera eramaten duela eta baita autonomia isolamendu afektiboekin identifikatzen dela ziurtasunaren premiaren kalterako. Azkenik, lan egiteko orduan baliogarriak izan daitezkeen jarraitzeko ildo batzuk nabariak dira.

Gizarte-elkarrekintza ingurunearen irakatsi eta ikasi prozesuan Lehen Hezkuntzan

Lan honetan, elkarrekintzaren bidez irakasle batek ikasleengan ezagutzak eraikitzeko zer mekanismoren bidez lortzen duen aztertu da, laguntzak nola egokitzen dituen eta laguntzeari nola uzten dion ikertuz. Helburua, elkarrekintzan eragina daukaten mekanismoak identifikatzea, deskribatzea eta ulertzea izan da. Horretarako, ikasleen iniziatiba bultzatzen duen giroan oinarritutako behaketa parte-hartzailea erabili da, errealitatea sistematikoki behatu eta eman diren gertaerak jaso, deskribatu, aztertu eta interpretatu direlarik. Behin transkribatutako saioak aztertuta, elkarrekintza segmentuak atera dira, horietan gehien errepikatzen diren jokabide-patroiak jasoz. Laguntzak egokitzean zein laguntzeari uztean, irakaslea ikasleen iniziatibetatik abiatzen dela ondorioztatu da.

Ecuaciones diferenciales ordinarias para estudiantes de Física

Conceptos fundamentales. - Ecuaciones de primer orden. - Ecuaciones de orden superior. - Sistemas de ecuaciones. - Transformación de Laplace. - Solución para series de ecuaciones lineales. - Métodos aproximados. - Teoría de la estabilidad. - Problemas de contorno de Sturm-Liouville. - Apéndice: Teoremas fundamentales. Métodos simbólicos. Resumen de métodos analíticos exactos. Definición y propiedades de algunas funciones. Tablas de transformadas de Laplace. Tablas de transformadas de Fourier. Soluciones y sugerencias para algunos ejercicios.

Fisika ikasleentzako ekuazio diferentzial arruntak

- Oinarrizko kontzeptuak. - Lehen ordenako ekuazioak. - Goi-ordenako ekuazioak. - Ekuazio-sistemak. - Laplace-ren transformazioa. - Ekuazio linealen serieen bidezko ebazpena. - Metodo hurbilduak. - Egonkortasunaren teoria. - Sturm eta Liouvillren mugalde-problemak. - Eransinak: Oinarrizko teoremak. Metodo sinbolikoak. Metodo analitiko laburpena. Funtzio batzuen definizioa eta propietateak. Laplace-ren transformatuen taulak. Fourier-ren transformatuen taulak. Ariketa batzuetarako iradokizunak eta soluzioak.

Simulazioak fisikaren irakaskuntzan

Proiektu honetan, fisikako problema ugari aztertu, simulatu eta garatu dira helburu pedagogiko batekin. Hizkuntza: euskara.

Stability analysis of RF amplifiers based on MIMO pole-zero identification

Spurious oscillations are one of the principal issues faced by microwave and RF circuit designers. The rigorous detection of instabilities or the characterization of measured spurious oscillations is still an ongoing challenge. This project aims to create a new stability analysis CAD program that tackles this chal- lenge. Multiple Input Multiple Output (MIMO) pole-zero identification analysis is introduced on the program as a way to create new methods to automate the stability analysis process and to help designers comprehend the obtained results and prevent incorrect interpretations. The MIMO nature of the analysis contributes to eliminate possible controllability and observability losses and helps differentiate mathematical and physical quasi-cancellations, products of overmodeling. The created program reads Single Input Single Output (SISO) or MIMO frequency response data, and determines the corresponding continuous transfer functions with Vector Fitting. Once the transfer function is calculated, the corresponding pole/zero diagram is mapped enabling the designers to analyze the stability of an amplifier. Three data processing methods are introduced, two of which consist of pole/zero elimina- tions and the latter one on determining the critical nodes of an amplifier. The first pole/zero elimination method is based on eliminating non resonant poles, whilst the second method eliminates the poles with small residue by assuming that their effect on the dynamics of a system is small or non-existent. The critical node detection is also based on the residues; the node at which the effect of a pole on the dynamics is highest is defined as the critical node. In order to evaluate and check the efficiency of the created program, it is compared via examples with another existing commercial stability analysis tool (STAN tool). In this report, the newly created tool is proved to be as rigorous as STAN for detecting instabilities. Additionally, it is determined that the MIMO analysis is a very profitable addition to stability analysis, since it helps to eliminate possible problems of loss of controllability, observability and overmodeling.

La construcción del escenario en la interacción social como transformación específica de la actividad en Educación Infantil

383 p.

Le système monétaire international comme facteur d'instabilité: une ébauche de réforme

371 p.