Institution
Universidade Federal de Minas Gerais
Education•Belo Horizonte, Minas Gerais, Brazil•
About: Universidade Federal de Minas Gerais is a education organization based out in Belo Horizonte, Minas Gerais, Brazil. It is known for research contribution in the topics: Population & Immune system. The organization has 41631 authors who have published 75688 publications receiving 1249905 citations.
Papers published on a yearly basis
Papers
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18 Aug 1996TL;DR: A belief network model for IR which is derived from probabilistic considerations over a clearly defined sample space is introduced and how to extend the model with information from other queries to yield improved retrieval performance is shown.
Abstract: We introduce a belief network model for IR which is derived from probabilistic considerations over a clearly defined sample space. This model subsumes the classical models in IR and generalizes the inference network model of Turtle and Croft. Further, we show how to extend the model with information from other queries (which we call contexts) to yield improved retrieval performance.
206 citations
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TL;DR: Histological lesion in the fetuses and placenta suggest the involvement of the parasite in the etiopathogenesis of reproductive failure in ewes, and the presence of T. vivax DNA in theplacenta, amniotic fluid, blood, and tissues from the Fetuses confirms the transplacental transmission of the parasites.
Abstract: The present study was aimed at investigating the effect of experimental infection by Trypanosoma vivax in different stages of pregnancy, determining the pathogenesis of reproductive failure, and confirming transplacental transmission. We used 12 pregnant ewes distributed into four experimental groups: G1, was formed by three ewes infected with T. vivax in the first third of pregnancy (30 days); G2 comprised three infected ewes in the final third of pregnancy (100 days); G3 and G4 were composed of three non-infected ewes with the same gestational period, respectively. Each ewe of G1 and G2 was inoculated with 1.25 × 105 tripomastigotes. Clinical examination, determination of parasitemia, serum biochemistry (albumin, total protein, glucose, cholesterol, and urea), packed cell volume (PCV), serum progesterone, and pathological examination were performed. Placenta, amniotic fluid, blood and tissues from the fetuses and stillbirths were submitted to PCR. Two ewes of G1 (Ewe 1 and 3) presented severe infection and died in the 34th and 35th days post-infection (dpi), respectively; but both fetuses were recovered during necropsy. In G2, Ewe 5 aborted two fetuses on the 130th day (30 dpi) of pregnancy; and Ewe 6 aborted one fetus in the 140th day (40 dpi) of gestation. Ewes 2 and 4 delivered two weak lambs that died five days after birth. Factors possibly involved with the reproductive failure included high parasitemia, fever, low PCV, body score, serum glucose, total protein, cholesterol, and progesterone. Hepatitis, pericarditis, and encephalitis were observed in the aborted fetuses. The presence of T. vivax DNA in the placenta, amniotic fluid, blood, and tissues from the fetuses confirms the transplacental transmission of the parasite. Histological lesion in the fetuses and placenta also suggest the involvement of the parasite in the etiopathogenesis of reproductive failure in ewes.
206 citations
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TL;DR: In this article, the Bethe-Salpeter equation was solved within tight-binding models of single-wall carbon nanotubes and the screening effect of the electrons was treated within the random phase and static screened approximations, and the exciton wave functions along the tube axis and circumference were discussed as a function of n,m.
Abstract: We have studied the exciton properties of single-wall carbon nanotubes by solving the Bethe-Salpeter equation within tight-binding models. The screening effect of the $\ensuremath{\pi}$ electrons in carbon nanotubes is treated within the random phase and static screened approximations. The exciton wave functions along the tube axis and circumference are discussed as a function of $(n,m)$. A $2n+m=\mathrm{const}$ family behavior is found in the exciton wave function length, excitation energy, binding energy, and environmental shift. This family behavior is understood in terms of the trigonal warping effect around the $K$ point of a graphene layer and curvature effects. The large family spread in the excitation energy of the Kataura plot is found to come from the single-particle energy.
205 citations
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TL;DR: Despite satisfactory results of EWL, the patients did not properly maintain the lost weight, mainly after 5 y postsurgery, and major factors that influenced this weight gain were poor diet quality, sedentary lifestyle, and lack of nutritional counseling follow-up.
205 citations
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TL;DR: In this paper, the authors evaluated the use of activated flux TIG (ATIG) welding for the austenitic stainless steels with fluxes of only one major component and found that even the very simple flux that was used can greatly increase the penetration of the weld bead.
205 citations
Authors
Showing all 42077 results
Name | H-index | Papers | Citations |
---|---|---|---|
Michael Marmot | 193 | 1147 | 170338 |
Pulickel M. Ajayan | 176 | 1223 | 136241 |
Alan D. Lopez | 172 | 863 | 259291 |
Jens Nielsen | 149 | 1752 | 104005 |
Mildred S. Dresselhaus | 136 | 762 | 112525 |
Jing Kong | 126 | 553 | 72354 |
Mauricio Terrones | 118 | 760 | 61202 |
Michael Brammer | 118 | 424 | 46763 |
Terence G. Langdon | 117 | 1158 | 61603 |
Caroline A. Sabin | 108 | 690 | 44233 |
Michael Brauer | 106 | 480 | 73664 |
Michael Bader | 103 | 735 | 37525 |
Michael S. Strano | 98 | 480 | 60141 |
Pablo Jarillo-Herrero | 91 | 245 | 39171 |
Riichiro Saito | 91 | 502 | 48869 |