منابع مشابه
Why Do AGN Lighthouses Switch Off?
Nearby galactic nuclei are observed to be very much dimmer than active galactic nuclei in distant galaxies. The Chandra X-ray Observatory has provided a definitive explanation for why this is so. With its excellent angular resolution, Chandra has imaged hot X-ray-emitting gas close to the gravitational capture radius of a handful of supermassive black holes, including Sgr A∗ in the nucleus of o...
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This paper uses a sample of matched data of firms-banks in China over the period 1999-2012 to determine the drivers of firms switching behaviour from one bank relationship to another. The findings conform to the extant literature and therefore indicate that the switching behaviour of Chinese firms is no different to firms elsewhere. The results show that the principal driver of a switching acti...
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High resolution cryoEM of mammalian mitoribosomes revealed the unexpected presence of mitochondrially encoded tRNA as a structural component of mitochondrial large ribosomal subunit (mt-LSU). Our previously published data identified that only mitochondrial (mt-) tRNAPhe and mt-tRNAVal can be incorporated into mammalian mt-LSU and within an organism there is no evidence of tissue specific variat...
متن کاملWhy individuals switch to using mobile payment: A migration-theoretic, empirical study
With mobile payment, individuals can buy goods and services through the use of a mobile device and wireless technology. Still, although the usage of mobile payment provides several advantages, such as a more convenient and faster paying-process, it is hardly used. Individuals rather stick with their current payment method, such as cash, EC card or credit card. In this study, we therefore try to...
متن کاملWhy medical students switch careers: changing course during the preclinical years of medical school.
OBJECTIVE To determine why students switch their career choices during the preclinical years of medical school. DESIGN Two questionnaires were administered: the first at the beginning of medical school and the second about 3 years later just before students entered clinical clerkship. SETTING University of British Columbia, University of Alberta, University of Toronto, University of Ottawa,...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 1979
ISSN: 0022-5223
DOI: 10.1016/s0022-5223(19)38152-8