161 research outputs found

    … Ruego a Vuestra Paternidad por las vísceras de Jesucristo. Retórica y vocación misionera de dos jesuitas italianos que deseaban las Indias (1640-1643)

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    Indexación: Revista UNABEstas cartas derivan de la recopilación de documentos —y las reflexiones sobre el perdón y la paz— en torno al desarrollo del proyecto CONICYT, FONDECYT Iniciación Nº 11140681 “Formas, dimensiones y topografía del perdón. Mediación jesuita, traducción religiosa-jurídica y normatividad entre Roma y Chile (siglo XVII)” (Investigador responsable: Rafael Gaune). Agradecemos a Mario Prades por la ayuda en la traducción de algunas palabras y frases del italiano de la época.Presentamos cuatro documentos escritos en Roma y Palermo, Italia, entre 1640 y 1643, de dos jesuitas italianos que, posteriormente, fueron misioneros en Chile durante la segunda mitad del siglo XVII. Las cartas se encuentran conservadas en el Archivo Romano de la Compañía de Jesús (ARSI) en el “Fondo Gesuitico”. Los documentos pertenecen a las denominadas cartas indipetae y están redactadas en el italiano de la época.http://revistahumanidades.unab.cl/wp-content/uploads/2016/01/Rev.-Humanidades.-Doc.-Gaune-y-Rolle.-261-275.pd

    Exploring the Impact of Different Sources Credibility on App Downloading Behavior: An ELM Perspective

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    With the increasing of using smart phone, people began to use “App” in their daily life. While they need to download a specific type of App, the developer of the App will provide them an introductory page which describes the functionality of the App and contains statistical data. Besides, function of “your friend who has downloaded this App” is introduced to smart phone users. Therefore, many peripheral cues are listed in the page nowadays to persuade people to download. The purpose of this study is to understand whether peripheral cues in the introductory page can persuade people to download this App. In our study, we used ELM-based theory to explain the behavior of persuading. The expected contribution of this study is to understand three peripheral cues would influence App credibility which influence attitude toward downloading. This study will provide advices to App developers to promote their strategies of business

    Penerapan discovery learning untuk meningkatkan pemahaman konsep siswa pada materi jaring-jaring kubus dan balok kelas V SD Negeri 101080 Gunungtua Kabupaten Padang Lawas Utara

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    Penelitian ini dilatarbelakangi oleh kesulitan siswa dalam menjawab soal-soal yang diberikan oleh guru pada materi jaring-jaring kubus dan balok. Pemahaman konsep serta kemampuan siswa dalam menyelesaikan masalah matematika sangat kurang dan tidak berkembang. Guru berperan sebagai satu-satunya sumber belajar dan jarang menggunakan model maupun media dalam proses pembelajaran sehingga siswa tidak paham bagaimana konsep dan penemuan jaring-jaring kubus dan balok karena metode yang digunakan guru hanya menghafal dan memberikan tugas. Hal inilah yang menyebabkan pemahaman konsep siswa rendah. Upaya yang dilakukan peneliti dalam menyelesaikan permasalahan tersebut adalah dengan menerapkan model pembelajaran discovery learning dalam pembelajaran matematika pada materi jaring-jaring kubus dan balok agar dapat meningkatkan pemahaman konsep. Berdasarkan latar belakang masalah tersebut, penelitian ini bertujuan untuk mengetahui apakah dengan penerapan model pembelajaran discovery learning dapat meningkatkan pemahaman konsep siswa pada materi jaring-jaring kubus dan balok kelas V SD Negeri 101080 Gunungtua. Jenis penelitian ini adalah penelitian tindakan kelas (PTK). Penelitian tindakan kelas merupakan proses pengkajian melalui sistem siklus. Penelitian ini dilakukan dalam dua siklus, setiap siklus terdiri dari dua kali pertemuan. Instrumen pengumpulan data pada penelitian ini adalah melalui tes dan observasi. Hasil penelitian menunjukkan bahwa ada peningkatan pemahaman konsep dengan penerapan discovery learning. Hal ini dibuktikan dari hasil tes awal ke siklus I sampai siklus II. Dimana, pada tes awal rata-rata nilai siswa 57,33 kemudian pada siklus I nilai rata-rata siswa 64,28 menjadi 73,55, pada siklus II dari 81,85 menjadi 86,48. Persentase siswa yang tuntas pemahaman konsep pada tes awal 32,43 kemudian meningkat pada siklus I dari 43,24% menjadi 62,16%, dan pada siklus II dari 75,67% menjadi 86,48%. Persentase siswa yang tidak tuntas pemahaman konsep pada siklus I dari 56,76% menjadi 37,84%, dan pada siklus II dari 24,33% menjadi 13,52%. Sesuai dengan indikator tindakan pada skripsi ini, dimana siswa sudah melewati nilai rata-rata 70 yaitu 86,48 dengan persentase siswa yang tuntas belajar sebesar 86,48%

    Altered Antioxidant-Oxidant Status in the Aqueous Humor and Peripheral Blood of Patients with Retinitis Pigmentosa

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    Retinitis Pigmentosa is a common form of hereditary retinal degeneration constituting the largest Mendelian genetic cause of blindness in the developed world. It has been widely suggested that oxidative stress possibly contributes to its pathogenesis. We measured the levels of total antioxidant capacity, free nitrotyrosine, thiobarbituric acid reactive substances (TBARS) formation, extracellular superoxide dismutase (SOD3) activity, protein, metabolites of the nitric oxide/cyclic GMP pathway, heme oxygenase-I and inducible nitric oxide synthase expression in aqueous humor or/and peripheral blood from fifty-six patients with retinitis pigmentosa and sixty subjects without systemic or ocular oxidative stress-related disease. Multivariate analysis of covariance revealed that retinitis pigmentosa alters ocular antioxidant defence machinery and the redox status in blood. Patients with retinitis pigmentosa present low total antioxidant capacity including reduced SOD3 activity and protein concentration in aqueous humor. Patients also show reduced SOD3 activity, increased TBARS formation and upregulation of the nitric oxide/cyclic GMP pathway in peripheral blood. Together these findings confirmed the hypothesis that patients with retinitis pigmentosa present reduced ocular antioxidant status. Moreover, these patients show changes in some oxidative-nitrosative markers in the peripheral blood. Further studies are needed to clarify the relationship between these peripheral markers and retinitis pigmentosa

    The Earth Hologenome Initiative: Data Release 1

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    Background The Earth Hologenome Initiative (EHI) is a global endeavor dedicated to revisit fundamental ecological and evolutionary questions from the systemic host–microbiota perspective, through the standardized generation and analysis of joint animal genomic and associated microbial metagenomic data. Results The first data release of the EHI contains 968 shotgun DNA sequencing read files containing 5.2 TB of raw genomic and metagenomic data derived from 21 vertebrate species sampled across 12 countries, as well as 17,666 metagenome-assembled genomes reconstructed from these data. Conclusions The dataset can be used to address fundamental questions about host–microbiota interactions and will be available to the research community under the EHI data usage conditions

    Cluster formation in supersonic beams of dense fluids

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    Mit zeitaufgelöster Massenspektrometrie untersuchen wir die Winkelverteilung von Kohlendioxid-Monomeren bei der Streuung von Kohlendioxid-Clustern an einer Si(111)/Siliciumdioxid-Oberfläche unter Ultrahochvakuum-Bedingungen. Die präsen- tierten Studien decken eine große Breite der Clustergrößen, , 1,000 < N < 200,000 Moleküle pro Partikel, ab. Dabei liegt der Fokus auf dem Einfluss der Ausgangsentropie, die durch eine präzise Einstellung des Ausgangsdruckes und der Düsentemperatur realisiert wurde. Es zeigt sich, daß die Streuverteilung direkt den Expansionspfad widerspiegelt, wodurch eine Unterscheidung zwischen Clustern, die durch eine Expansion auf der gasförmigen oder flüssigen Seite des kritischen Punktes und der metstabilen Phase ent- stehen, ermöglicht wird. Um bei den hohen Teilchendichten eine verlässliche Aussage zu ermöglichen, wurden im Vorfeld die Eigenschaften gepulster Molekularstrahlen untersucht, insbesondere deren Abhängigkeit vom Restgasdruck und den Wechselwirkungen mit Strahlblenden. Hierzu diente die elektronische Anregung eines Helium-Strahls. Die Optimierung der Randbedingungen ermöglicht viel kältere Strahlen, so dass Helium-Cluster sogar bei einer Ausgangstemperatur von T = 410.0 K gefunden werden können. Dieses Ergebnis ist für die Cluster-Forschung, die Molekülspektroskopie und Experimente in der Quantenphysik von Bedeutung.Employing pulsed high-pressure supersonic jet expansion and a dedicated setup for the experimental investigation of chemical processes occurring between neutral, van der Waals bound clusters and a solid surface, we report on the angular distribution observed for large carbon dioxide clusters scattered off a Si(111)/Silicon Dioxide surface under ultrahigh vacuum conditions. Scattered particles are detected using angle and time resolved mass spectrometry. The presented studies cover a broad range of cluster sizes, , 1,000 < N < 200,000 molecules per particle. The focus is on the influence of source entropy, realized by accurately setting stagnation pressure and temperature. This thesis demonstrates a dependence of the angular distribution of scattered carbon dioxide monomers on source conditions: the scattering distribution directly reflects the expansion path, allowing us to distinguish between clusters generated via expansion on the gaseous or on the liquid side of the critical point, and an intermediate regime where the expansion passes the metastable gas-liquid region. To optimize the supersonic beam, on the other hand, we reveal a substantial influence of residual gas pressure and beam–skimmer interactions on beam properties, particularly the minimum attainable translational temperature in a model system. This study contains the systematic investigation of supersonic jet expansions of helium, employing the variable distance between the Even-Lavie valve and different types of skimmers. Utilizing the ultra-high precision time-of-flight measurements of electronically tagged particles, the terminal velocities and the spread of particles allow us to correspondingly obtain much colder beams with the same source conditions. As a result, helium clusters can be found even in the jet expansion from a source temperature of T = 410.0 K. This knowledge is of particular interest to cluster science, molecular spectroscopy, and quantum physics
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