109 research outputs found

    Instanton Induced Neutrino Majorana Masses in CFT Orientifolds with MSSM-like spectra

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    Submitted on 9 Apr 2007 (v1), last revised 25 Apr 2007 (this version, v2).-- 68 pages, 2 figures.-- v2: typos corrected, refs added.-- Published in: JHEP06(2007)011.Recently it has been shown that string instanton effects may give rise to neutrino Majorana masses in certain classes of semi-realistic string compactifications. In this paper we make a systematic search for supersymmetric MSSM-like Type II Gepner orientifold constructions admitting boundary states associated with instantons giving rise to neutrino Majorana masses and other L- and/or B-violating operators. We analyze the zero mode structure of D-brane instantons on general type II orientifold compactifications, and show that only instantons with O(1) symmetry can have just the two zero modes required to contribute to the 4d superpotential. We however discuss how the addition of fluxes and/or possible non-perturbative extensions of the orientifold compactifications would allow also instantons with Sp(2) and U(1) symmetries to generate such superpotentials. In the context of Gepner orientifolds with MSSM-like spectra, we find no models with O(1) instantons with just the required zero modes to generate a neutrino mass superpotential. On the other hand we find a number of models in one particular orientifold of the Gepner model (2,4,22,22) with Sp(2) instantons with a few extra uncharged non-chiral zero modes which could be easily lifted by the mentioned effects. A few more orientifold examples are also found under less stringent constraints on the zero modes. This class of Sp(2) instantons have the interesting property that R-parity conservation is automatic and the flavour structure of the neutrino Majorana mass matrices has a simple factorized form.The research of A.N. Schellekens was funded in part by program FP 57 of the Foundation for Fundamental Research of Matter (FOM), and Research Project FPA2005-05046 of Ministerio de Educación y Ciencia, Spain. The research by L.E. Ibáñez and A.M. Uranga has been supported by the European Commission under RTN European Programs MRTN-CT-2004-503369, MRTN-CT-2004-005105, by the CICYT (Spain), and the Comunidad de Madrid under project HEPHACOS P-ESP-00346.Peer reviewe

    Method of recovering municipal boundary lines in Province of Valencia (Spain) by means of historical cadastral maps

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    Land demarcation is a fundamental requirement when determining to what extent property owners and public administrations can apply their rights. Just as international boundaries must be clearly marked so that there can be no doubt as to which jurisdiction is to be applied, municipal boundaries must be clearly defined in order to avoid disputes between local administrations. In Spain the Geographical Institute carried out the demarcation of all municipal boundaries at the end of the 19th and beginning of the 20th centuries, defined their limits on cadastral maps and represented them on the 1:50,000 scale National Topographical Map. At the present time, more than a hundred years after this survey, in many cases parts of the original municipal limits have been lost for one reason or another, both on the maps and on the ground itself, and it has now become necessary to take steps to recover them. This paper defines a method of using the municipal councils own historical information to trace original boundary lines. The work included both a study and a series of tests carried out in different municipal areas in the Province of Valencia, Spain. The original reports and field notebooks of the Geographical Institute were used as the basic material of the study, supported by cadastral maps from different periods, as well as historical and contemporary orthophotos to help locate possible boundary markers. GPS techniques were employed to look for, survey and reinstate boundary marker positions.This work has been partially supported by the research project 'The Land Registry as the basic tool for organising spatial information; INSPIRE Directive, spatial data and metadata (II)', DER2011-23321 from the Spanish Government.Femenía Ribera, C.; Benítez Aguado, E.; Mora Navarro, JG.; Martínez Llario, JC. (2014). Method of recovering municipal boundary lines in Province of Valencia (Spain) by means of historical cadastral maps. Survey Review. 46(337):255-266. https://doi.org/10.1179/1752270613Y.0000000081S25526646337Aguña Martín J. 2000.Deslindes de fincas. El topógrafo como técnico indispensable de la determinaci�n de la propiedad. La topografía aplicada a la problemática inmobiliaria.Topografía Aplicada. XVI Cursos de Verano de Laredo. Universidad de Cantabria.Alcázar Molina M. 2003.Catastro Inmobiliario. Centro de Ingeniería Económica (INECO) Editorial Universidad Politécnica de Valencia ref. 2003–2176.Berné Valero J.L and Femenia-Ribera C., C., 2000.Catstro de rústica. Editorial Universidad Politécnica de Valencia ref. 2000–4185, 386.Berné Valero J.L, Femenia-Ribera C, Aznar Bellver J. 2004.Catastro y Valoración Catastral. Editorial Universidad Politécnica de Valencia ref. 2004–532.Berné Valero J.L, Femenia-Ribera C, Benitez-Aguado E. 2008.Catastro en España. Editorial Universidad Politécnica de Valencia ref. 2008–413, 550.Blais, H. (2011). An intra-imperial conflict: the mapping of the border between Algeria and Tunisia, 1881–1914. Journal of Historical Geography, 37(2), 178-190. doi:10.1016/j.jhg.2010.11.006Brumec, M., & Koleša, J. (2011). Land cadastral representation adjustment when making land survey plan. Geodetski vestnik, 55(02), 284-291. doi:10.15292/geodetski-vestnik.2011.02.284-291Capdevila i Subirana J. 2009a.Historia del deslinde de la frontera hispano-francesa. Del tratado de los Pirineos (1659) a los tratados de Bayona (1856-1868). Instituto Geográfico Nacional-Centro Nacional de Información Geográfica, 184.Capdevila i Subirana J. 2009b. Qui va dibuixar la ratlla? Treballs de la Comisión Mixta de Límites (1853–1868).Congrés El Fet Fronterer. Fronteres, relacions, intercanvis.Institut d’Estudis Empordanesos, Figueres.Casey, E. S. (2011). Border versus Boundary at La Frontera. Environment and Planning D: Society and Space, 29(3), 384-398. doi:10.1068/d0410Collier, P. (2009). International Boundary Surveys and Demarcation in the Late 19thand Early 20thCenturies. Survey Review, 41(311), 2-13. doi:10.1179/003962608x325457Cruz Sánchez F. 2010.Líneas límite en la Comunidad Valenciana. Colegio Oficial de Ingenieros Técnicos en Topografía. Valencia.Cruz Sánchez F. 2011.Determinación de líneas límites, Primeras Jornadas de Arquitectura e Ingeniería Civil y Cartográfica de la Comunidad Valenciana. Valencia.Donaldson, J. W. (2008). Pillars and perspective: demarcation of the Belgian Congo–Northern Rhodesia boundary. Journal of Historical Geography, 34(3), 471-493. doi:10.1016/j.jhg.2007.11.005Donaldson, J. W. (2008). Politics and scale in boundary-making: the work of boundary commissions. Journal of Historical Geography, 34(3), 393-396. doi:10.1016/j.jhg.2008.02.001Femenia-Ribera C. 2006. La topografía y la cartografía en los deslindes y servidumbres en España,Biblio 3W: Revista bibliográfica de Geografía y Ciencias Sociales, 10, pp. 100–110, Aviailable at: [accessed 10 July 2013].Femenia-Ribera C. 2009.La Cartografía y su Legislación Territorial. Editorial Universidad Politécnica de Valencia ref. 2009-505, 272.Femenia-Ribera C, Mora-Navarro G, Benitez-Aguado E, Garrido Villén N. 2013. A study and analysis of ways of representing the boundary between adjacent municipal areas as used in different types of maps in Valencia wetland.Scripta Nova.Revista electrónica de geografía y ciencias sociales, to be published.Fernández Pareja M.T and García-Patos Herreros P.J. 2012. International Border Agreements: Spanish-Portuguese Model.X Congreso TopCart 2012: Congreso IberoAmericano de Geomática y Ciencias de la Tierra, Madrid.Forman, G. (2006). Law and the historical geography of the Galilee: Israel’s litigatory advantages during the special operation of land settlement. Journal of Historical Geography, 32(4), 796-817. doi:10.1016/j.jhg.2005.09.004Garrido-Villén, N., Antón-Merino, A., Berné Valero, J. L., & Femenia Ribera, C. (2013). Land surveyors as expert witnesses in real estate litigation matters in Spain. geodetski vestnik, 57(01), 066-084. doi:10.15292/geodetski-vestnik.2013.01.066-084García Cepeda F. 2009.Doctoral Thesis: Optimización de la metodología para la definición, actualización, mantenimiento y aprovechamiento de las líneas límite jurisdiccionales.Departamento de Ingeniería Topográfica y Cartográfica. Universidad Politécnica de Madrid.García Lario J.M and Pérez Casas J.M. 2010.Delimitaciones Territoriales, Centro Nacional de Información Geográfica, Curso Básico sobre el Sistema Cartográfico Nacional. Valencia.Grimalt Servera P. 2001.El Deslinde entre Particulares. Editorial Aranzadi.Kim, M.-A. (2009). The Imaginary Line: A History of the United States and Mexican Boundary Survey, 1848-1857. Hispanic American Historical Review, 89(1), 196-197. doi:10.1215/00182168-2008-077Mañero García A. 2012a.Plan Nacional de Referenciación Geográfica Municipal, Centro Nacional de Información Geográfica. Curso Básico sobre el Sistema Cartográfico Nacional. Valencia.Mañero García A., Piña García F., García Lario J.M and Pérez Casas J.M. 2012b. Actualización de las delimitaciones territoriales en Cantabria,X Congreso TopCart 2012: Congreso IberoAmericano de Geomática y Ciencias de la Tierra.Madrid.Martínez RiveraF., Díez Díaz J., Buitrago M., Olaya G., Ladino A., Duarte E and Mafla E. 2006.Guía para el Deslinde y Amojonamiento, Entidades Territoriales de la República de Colombia. Departamento Nacional de Estadística-DANE, Instituto Geográfico Agustín Codazzi, Colombia, 32.Massó M, Torres M and Jiménez MM. 2011. La recuperació dels límits municipals històrics, Conveni DGAP-ICC (2005-2011,Revista Catalana de Geografia. Revista digital de geografía, cartografía i ciències de la Terra,43, vol. XVI. Available at: [accessed 15 January 2013].Moya Rodríguez M and García-Rodrigo Martín A.M. 2002.Catastro, Valoración y Tributación Inmobiliaria Rústica, Editorial Artemedia Comunicación S.L., p. 454.Piña García F. 2009.Doctoral Thesis: Los Límites Administrativos, el Dominio Público y la zonificación del espacio en la Ordenación del Territorio y el Urbanismo, Análisis y evaluación posicional en Cantabria. Departamento de Ingeniería Geográfica y Técnicas de Expresión Gráfica, Universidad de Cantabria.Pirti, A., Arslan, N., Deveci, B., Aydin, O., Erkaya, H., & Hosbas, R. G. (2009). Real-Time Kinematic GPS for Cadastral Surveying. Survey Review, 41(314), 339-351. doi:10.1179/003962609x451582Pro Ruíz J. 1992.Estado, geometría y propiedad: Los orígenes del Catastro en España: 1715-1941. Centro de Gestión Catastral y Cooperación Tributaria, Ministerio de Economía y Hacienda, p. 419.Pro Ruíz J. 1999.El Catastro desde el punto de vista histórico. XV° Curso de Especialización: Cartografía Catastral Informatizada y Cartografía a grandes escalas.Reguera Rodríguez A.T. 2007. La lucha postal por el territorio.Scripta Nova. Revista electrónica de geografía y ciencias sociales, 237, XI. Aviailable at: [accessed 10 July 2013].Tucci, M., & Giordano, A. (2011). Positional accuracy, positional uncertainty, and feature change detection in historical maps: Results of an experiment. Computers, Environment and Urban Systems, 35(6), 452-463. doi:10.1016/j.compenvurbsys.2011.05.004Urteaga L, Nadal F, Muro JI. 2003. Imperialismo y cartografía: La organización de la Comisión Española del Estado Mayor en Marruecos (1881–1882).Scripta Nova. Revista electrónica de geografía y ciencias sociales, 142, VII. Available at: [accessed 10 July 2013].Urteaga L. 2006. 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    Prevalencia de anomalías coronarias detectadas por tomografía computarizada en el Instituto Nacional Cardiovascular - INCOR

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    Objective: To determine the prevalence of coronary anomalies (CA) in patients evaluated by 64-detector computed tomography (CT) at the Instituto Nacional Cardiovascular in Peru between 2016 and 2020. Materials and methods: Retrospective observational study, coronary artery CT scans of 1486 patients were performed on a 64-detector row CT scanner and reviewed in search for coronary anomalies. Results: The prevalence of CA detected by CT was 4.71% (70 cases) of which 64.3% were male. Abnormalities of origin were the most frequent, of which the origin of a coronary artery from the opposite coronary sinus was the most common (48.6%), with the right coronary being the main anomalous artery (31%), and the main path was interarterial (31%). Anomalous origin of the left main coronary from the pulmonary artery was found in 5 patients. Among the anomalies of the intrinsic coronary arterial anatomy the most frequent was the double left anterior descending artery (10%). Coronary fistulas accounted for 11.4% of cases. Conclusions: The prevalence of CA detected by 64-detector CT in a Peruvian institute was 4.71%. The most frequent coronary anomaly was the origin of the right coronary artery from the left coronary sinus with interarterial trajectory.Objetivo: determinar la prevalencia de anomalías coronarias (AC) en pacientes evaluados por tomografía computarizada (TC) de 64 detectores en el Instituto Nacional Cardiovascular en el Perú entre los años 2016 a 2020. Materiales y métodos: estudio observacional retrospectivo, en el cual se revisaron las TC de arterias coronarias de 1486 pacientes, realizadas en un tomógrafo de 64 filas de detectores, en busca de anomalías coronarias. Resultados: la prevalencia de AC detectada por TC fue de 4,71% (70 casos) de ellos 64,3% varones. Las anomalías de origen fueron las más frecuentes, de ellas el nacimiento de una arteria coronaria desde el seno coronariano opuesto fue la más común (48,6%), siendo la coronaria derecha la principal arteria anómala (31%), y el principal trayecto fue el interarterial (31%). El origen anómalo del tronco coronario izquierdo desde la arteria pulmonar se encontró en cinco pacientes. Entre las anomalías de la anatomía arterial coronaria intrínseca, la principal fue la doble arteria descendente anterior (10%). Las fístulas coronarias representaron el 11,4% de casos. Conclusiones: la prevalencia de AC detectadas por TC de 64 detectores en un instituto del Perú fue de 4,71%. La principal anomalía coronaria fue el origen de la arteria coronaria derecha desde el seno coronariano izquierdo con trayecto interarterial

    Planeamiento territorial sostenible: un reto para el futuro de nuestras sociedades; criterios aplicados

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    In a large part of the 17 sustainable development objectives set as goals for humanity by the UN, sustainability can be glimpsed. As a result of the dominant socio-productive model, the only way to head towards more sustainable territories that allow achieving and maintaining the well-being of the world's population is to bear in mind the need to properly plan territorial development. This work reflects on this need and takes a step forward in the definition of the main criteria to achieve territorial sustainability at regional and local scales

    Decreased cardiotrophin-1 levels are associated with a lower risk of developing the metabolic syndrome in overweight/obese children after a weight loss program

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    Objective: Cardiotrophin-1 (CT-1) shares some similarities with other cytokines, and participates in the control of energy metabolism. Higher circulating levels are observed in obese humans, but little information is gathered in weight loss (WL) programs. Therefore, we aimed to investigate the association of serum CT-1 levels with metabolic variables and the risk of developing metabolic syndrome (MetS) after a WL program in overweight/obese children. Subjects and Methods: Forty-four overweight/obese children (mean age 11.5 yr; 50% males) undergoing a 10-week WL program were enrolled. Subjects were dichotomized at the median of Body Mass Index-Standard Deviation Score (BMI-SDS) change, as high and low responders after intervention. Results: CT-1 levels were significantly reduced (-48 fmol/mL, p=0.043) in the high responder group after the WL program. They had significantly lower body weight (-3.7 kg, p<0.001), body fat mass (-8%, p<0.001), BMI-SDS (-0.78, p<0.001) and waist circumference (-5.4 cm, p<0.001), and a significant improvement in lipid and glucose profiles (p<0.05). Interestingly, decreased CT-1 levels significantly predicted changes in total cholesterol (41%) and LDL-cholesterol (28%). Moreover, in our participants the lower the CT-1 levels, the higher the reduction in MetS risk components, after the 10- week intervention, (p-ANCOVA=0.040, p-trend=0.024). Conclusion: We showed, for the first time, a reduction in serum CT-1 levels after a WL program and this decrease in CT-1 was strongly associated with a reduction in cholesterol levels and in MetS risk factors in overweight/obese children. Our findings may suggest that CT-1 could be an indirect marker for the diagnosis of MetS in this population

    Instanton Induced Open String Superpotentials and Branes at Singularities

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    41 pages, 2 figures.We study different aspects of the non-perturbative superpotentials induced by Euclidean E3-branes on systems of D3/D7-branes located at Abelian orbifold singularities. We discuss in detail how the induced couplings are consistent with the U(1) symmetries carried by the D3/D7-branes. We construct different compact and non-compact examples, and show phenomenologically relevant couplings like μ-terms or certain Yukawa couplings generated by these E3 instantons. Some other novel effects are described. We show an example where E3-instantons combine with standard gauge instantons to yield new multi-instanton effects contributing to superpotential, along the lines of ref.[28]. In the case of non-SUSY Z_N tachyon-free singularities it is shown how E3-instantons give rise to non perturbative scalar couplings including exponentially suppressed scalar bilinears.This work has been supported by the European Commission under RTN European Programs MRTN-CT-2004-503369, MRTN-CT-2004-005105, by the CICYT (Spain), the Comunidad de Madrid under project HEPHACOS P-ESP-00346 and the Ingenio 2010 CONSOLIDER program CPAN

    The Basque farmhouses of Zelaa and Maiz Goena: New dendrochronology-based findings about the evolution of the built heritage in the northern Iberian Peninsula

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    The Basque farmhouse, a characteristic building type for north-western Spain, is an architectural solution that allows the combined management of different rural activities. In addition to providing living quarters and a space for a cider press these farmhouses were designed to function as, among others, stable, barn and warehouse. They were often owned and managed by one family, with no links to ecclesiastic organizations. Architectural studies have established that these buildings first were constructed at the end of the 15th century without previous local precedent. This places their initial construction in a calm and relatively secure period, when the wars between the aristocratic lineages which had started in 1418, and which had resulted in assaults, looting and fires, had come to an end. The timing of their first occurrence has led to the interpretation that they represent a building tradition imported from the North. Dendrochronological research initially confirmed their late fifteenth-century origin. However recent restoration work in two previously undocumented farmhouses at Ezkio and Lazkao (Gipuzkoa territory) has enabled a reassessment of this interpretation. The architectural analysis of these buildings shows that their construction plans, which are quite similar, deviates from the general plan according to which the majority of Basque farmhouses were built. The newly identified model, wholly executed in wood with the exception of the roof covering, is based on the repetition of frames and bays. Together these generate the volume of the building, which is larger than the volume of other farmhouses. We collected a total of 81 oak (Quercus sp.) samples from both farmhouses and using Basque chronology ARAB9 as a reference established that these represent trees that were cut down in the spring of 1445 and in 1453 respectively. Since construction most likely took place within a few years after the trees were felled, this indicates that Basque farmhouses began to be constructed decades earlier than expected. At that time wars still raged in the Basque Country. If it is true that the political situation determined the degree of diffusion of non-indigenous architectural concepts in this region, the new findings can be interpreted as supporting the hypothesis that Basque farmhouses reflect a regionally-developed building tradition
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