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Search Results: 1 - 10 of 53136 matches for " David Guijarro "
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Soft restrictions on positively curved Riemannian submersions
David González,Luis Guijarro
Mathematics , 2015,
Abstract: We bound the dimension of the fiber of a Riemannian submersion from a positively curved manifold in terms of the dimension of the base of the submersion and either its conjugate radius or the length of its shortest closed geodesic.
Chiral β-Amino Alcohols as Ligands for the Ruthenium-Catalyzed Asymmetric Transfer Hydrogenation of N-Phosphinyl Ketimines
óscar Pablo,David Guijarro,Miguel Yus
Applied Sciences , 2012, DOI: 10.3390/app2010001
Abstract: Some chiral β-amino alcohols have been evaluated as potential ligands for the ruthenium-catalyzed asymmetric transfer hydrogenation (ATH) of N-phosphinyl ketimines in isopropyl alcohol. The ruthenium complex prepared from [RuCl 2( p-cymene)] 2 and (1 S,2 R)-1-amino-2-indanol has shown to be an efficient catalyst for the ATH of several N-(diphenylphosphinyl)imines, affording the reduction products in very good isolated yields and enantiomeric excesses up to 82%. The inherent rigidity of the indane ring system present in the ligand seems to be very important to achieve good enantioselectivities.
Caracterización de se ales no estacionarias empleando distribución Wigner Ville en el reconocimiento de zonas cerebrales
JULIAN DAVID ECHEVERRY,JORGE EDUARDO CALLE,ENRIQUE GUIJARRO E.
Scientia Et Technica , 2006,
Abstract: Las representaciones en los espacios conjuntos de tiempo y frecuencia han demostrado ser efectivas en tareas de caracterización de se ales no estacionarias. En este trabajo se emplea la distribución Wigner Ville (WVD), como herramienta de representación en el espacio tiempo-frecuencia de se ales de microelectrodos de registro (MER), para el reconocimiento de zonas cerebrales. Con el fin de reducir el costo computacional, se implementa una etapa de preproceso en la que se filtra y se aplica sub-muestreo a la se al.
The first disciples of Jesus in Galilee
S Guijarro
HTS Theological Studies/Teologiese Studies , 2007,
Abstract: Early Christian writings provide little information about the Jesus movement in Galilee, but the study of the pre-Synoptic-, and especially the pre-Markan collections, can shed some light on this important period of the beginnings of Christianity. This essay starts by reconstructing the pre-Markan collection of Galilean controversies (Mk 2:1-3:6) and argues that its composition could have taken place in Galilee. These controversies reflect a process of construction of group identity whose main traits can be identified with the aid of social identity and cultural memory studies. This process can also be placed in the historical context of the emergence of sectarian groups within Second Temple Judaism. The contention of this enquiry is that the pre-Markan collection of the Galilean controversies can provide valuable information about the first disciples of Jesus in Galilee. HTS Theological Studies Vol. 63 (3) 2007: pp. 885-908
The Jesus of Paul: A contribution from the social sciences
S Guijarro
HTS Theological Studies/Teologiese Studies , 2011,
Abstract: The letters of Paul speak more frequently of the resurrected and exalted Jesus than they do of the earthly Jesus. Nonetheless, this does not mean that the apostle and his addressees did not know the teachings and main events of Jesus’ life. Their insistence as to the heavenly identity of Jesus is as likely to have been motivated by contextual factors which guided the development of the primitive Christological confessions which Paul received in the years after his conversion. This article will focus on two of these factors: the configuration of the Christian communities of the Diaspora as foreign cults in a context of religious plurality and the new revelatory experiences which triggered the formation of a binitarian faith. Determining the relationship between Jesus and Paul is one of the fundamental tasks of those who, like Prof. Andries van Aarde, study the origins of Christianity and the beginnings of Christian theology. The basic question in this regard, at least as it has been formulated recently by David Wenham (1995), is whether Paul was a follower of Jesus or the founder of Christianity (see also Wedderburn [1989] and Barbaglio [2006]). In this brief article, I would like to consider one aspect of this general topic and to offer a few suggestions that might contribute to a better understanding of the peculiar vision of Jesus that we find in the letters of Paul. In them, in fact, the apostle moves from the incarnation to the death and resurrection, leaving in the shadows the activity and teaching of Jesus to which the gospels subsequently give so much importance. This contrast raises some questions concerning the knowledge which Paul had of the Jesus tradition and the value he accorded to it: What did he know about Jesus? Did he know the traditions which the evangelists later collected? Why does he not refer to them in his letters more frequently? By contrast, why does he give so much importance to the death and resurrection of Jesus and to Jesus’ divine condition?
The first disciples of Jesus in Galilee
Santiago Guijarro
HTS Theological Studies/Teologiese Studies , 2009, DOI: 10.4102/hts.v63i3.245
Abstract: Early Christian writings provide little information about the Jesus movement in Galilee, but the study of the pre-Synoptic-, and especially the pre-Markan collections, can shed some light on this important period of the beginnings of Christianity. This essay starts by reconstructing the pre-Markan collection of Galilean controversies (Mk 2:1-3:6) and argues that its composition could have taken place in Galilee. These controversies reflect a process of construction of group identity whose main traits can be identified with the aid of social identity and cultural memory studies. This process can also be placed in the historical context of the emergence of sectarian groups within Second Temple Judaism. The contention of this enquiry is that the pre-Markan collection of the Galilean controversies can provide valuable information about the first disciples of Jesus in Galilee.
The Jesus of Paul: A contribution from the social sciences
Santiago Guijarro
HTS Theological Studies/Teologiese Studies , 2011, DOI: 10.4102/hts.v67i1.862
Abstract: The letters of Paul speak more frequently of the resurrected and exalted Jesus than they do of the earthly Jesus. Nonetheless, this does not mean that the apostle and his addressees did not know the teachings and main events of Jesus’ life. Their insistence as to the heavenly identity of Jesus is as likely to have been motivated by contextual factors which guided the development of the primitive Christological confessions which Paul received in the years after his conversion. This article will focus on two of these factors: the configuration of the Christian communities of the Diaspora as foreign cults in a context of religious plurality and the new revelatory experiences which triggered the formation of a binitarian faith. Determining the relationship between Jesus and Paul is one of the fundamental tasks of those who, like Prof. Andries van Aarde, study the origins of Christianity and the beginnings of Christian theology. The basic question in this regard, at least as it has been formulated recently by David Wenham (1995), is whether Paul was a follower of Jesus or the founder of Christianity (see also Wedderburn [1989] and Barbaglio [2006]). In this brief article, I would like to consider one aspect of this general topic and to offer a few suggestions that might contribute to a better understanding of the peculiar vision of Jesus that we find in the letters of Paul. In them, in fact, the apostle moves from the incarnation to the death and resurrection, leaving in the shadows the activity and teaching of Jesus to which the gospels subsequently give so much importance. This contrast raises some questions concerning the knowledge which Paul had of the Jesus tradition and the value he accorded to it: What did he know about Jesus? Did he know the traditions which the evangelists later collected? Why does he not refer to them in his letters more frequently? By contrast, why does he give so much importance to the death and resurrection of Jesus and to Jesus’ divine condition? How to cite this article: Guijarro, S., 2011, ‘The Jesus of Paul: A contribution from the social sciences’, HTS Teologiese Studies/Theological Studies 67(1), Art. #862, 6 pages. DOI: 10.4102/hts.v67i1.862
Solution Structure of an Archaeal DNA Binding Protein with an Eukaryotic Zinc Finger Fold
Florence Guillière, Chloé Danioux, Carole Jaubert, Nicole Desnoues, Muriel Delepierre, David Prangishvili, Guennadi Sezonov, J. I?aki Guijarro
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0052908
Abstract: While the basal transcription machinery in archaea is eukaryal-like, transcription factors in archaea and their viruses are usually related to bacterial transcription factors. Nevertheless, some of these organisms show predicted classical zinc fingers motifs of the C2H2 type, which are almost exclusively found in proteins of eukaryotes and most often associated with transcription regulators. In this work, we focused on the protein AFV1p06 from the hyperthermophilic archaeal virus AFV1. The sequence of the protein consists of the classical eukaryotic C2H2 motif with the fourth histidine coordinating zinc missing, as well as of N- and C-terminal extensions. We showed that the protein AFV1p06 binds zinc and solved its solution structure by NMR. AFV1p06 displays a zinc finger fold with a novel structure extension and disordered N- and C-termini. Structure calculations show that a glutamic acid residue that coordinates zinc replaces the fourth histidine of the C2H2 motif. Electromobility gel shift assays indicate that the protein binds to DNA with different affinities depending on the DNA sequence. AFV1p06 is the first experimentally characterised archaeal zinc finger protein with a DNA binding activity. The AFV1p06 protein family has homologues in diverse viruses of hyperthermophilic archaea. A phylogenetic analysis points out a common origin of archaeal and eukaryotic C2H2 zinc fingers.
Relato etnográfico de un encuentro real: visita al Khuta mafwe, región de Caprivi, Estado de Namibia
Guijarro,Ester Massó;
Etnográfica , 2008,
Abstract: this article presents a classic ethnographic narrative through thick description. the anthropological events of a visit to a khuta - traditional authority - mafwe in the caprivian region of namibia (bordering zambia, zimbabwe, botswana and angola), are analysed, through the inevitable subjectivity of fieldwork (considering it as richness, in opposite at an impossible neutrality). ethnographical narrative is used as a pretext to illuminate some of the crucial comprehension keys on the current relations between autochthonous traditional authorities and the namibian government, in the wake of the secession revolt on august 1999, which involved the political exile of the former mafwe chief - splinter supporter - opposite the current one - government follower. through ethnographical subjectivity, it is intended a human accurate complex approach to a thick social reality, full in its turn of various subjectivities, historical contingencies and inescapable vital arbitrariness.
Mishake Muyongo, entre la Política y la Tribu: Una reflexión sobre la doble legitimidad en áfrica en el panorama de la globalización
Guijarro,Ester Massó;
Cadernos de Estudos Africanos , 2011,
Abstract: el objetivo de este artículo se estructura en cuatro partes: la primera y la segunda abordan, respectivamente, la cuestión de la doble legitimidad en áfrica en general y en el marco de namibia en particular (a través de una sucinta revisión de la teoría sobre las au toridades tradicionales y no tradicionales, así como de las situaciones de interlegalidad); la tercera parte explicita el caso (pretexto para estas reflexiones) del papel de mishake muyongo en el movimiento independentista capriviano en namibia, como ejemplo signi ficativo de doble legitimidad en la autoridad personal; la cuarta y última parte presenta preguntas (no tanto respuestas) y pensamientos conclusivos de este trabajo.
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