3,120 research outputs found
The antenna DSA 3 and its potential use for Radio Astronomy
The European Space Agency (ESA) will inaugurate its third Deep Space Antenna
(DSA 3) by the end of 2012. DSA 3 will be located in Argentina near the city of
Malarg"ue in the Mendoza province. While the instrument will be primarily
dedicated to communications with interplanetary missions, the characteristics
of its antenna and receivers will also enable standalone leading scientific
contributions, with a high scientific-technological return. We outline here
scientific proposals for a radio astronomical use of DSA 3.Comment: 4 pages, submitted as Proceedings for the BAA
Truth telling and terminal patient care
En el presente escrito, abordamos la cuestión de la verdad en la relación médico- paciente, concretamente en el caso de los enfermos terminales. Analizamos los problemas y actitudes acerca de decir la verdad cuando se trata de una enfermedad mortal, concluyendo lo importante que es que haya una comunicación fluida y veraz en la relación terapéutica. Asà mismo, examinamos y destacamos el papel que pueden tener los médicos generales –el médico de cabecera– en la atención a enfermos terminales en el hogar y con sus familiares y/o amigos.The aim of this text is to examine the issue of truth telling in doctor-patient relationships, namely in the case of terminal patients. We analyze the problems and attitudes regarding truth telling that there are present when patients suffer from mortal diseases. We conclude that it is very important to keep a fluent and truthful communication in the doctor-patient relationship. We also examine and stress the role that general practitioners can play in the care of terminal patients at their home and with their friends and/or relatives
Growth and bacterial dynamics of beef calves during transition from milk/pasture to a high-concentrate diet added with tannins or medium-chain fatty acids
Context. Rumen fermentation modulation with feed additives during the transition period to high-concentrate diets might help to avoid bacterial dysbiosis. Aims. Assessing the effects of the addition of tannins and medium-chain fatty acids (MCFA) to the adaptation diet of beef calves to a high-concentrate ration on the rate of intake, animal performance and rumen bacterial composition. Methods. Eighteen 7-month-old beef calves were abruptly weaned and transitioned over a 28-day period from a milk/grass regime to one of the following diets: a non-supplemented high-concentrate diet plus wheat straw, both given ad libitum (C); C plus 20 g/kg of a 65:35 chestnut and quebracho tannin extract; and C plus 6 g/kg of a commercial mixture of MCFA. Concentrate and straw rate of intake were recorded. Rumen fluid was collected on Days 0, 1, 7, 14, 21 and 28 at 0, 3, 6 and 9 h after feeding to characterise rumen fermentation. Samples from 0 h were analysed to assess the bacterial population using Ion Torrent sequencing. Key results. The rate of intake of concentrates and straw, as well as daily gains and final weights, were similar (P > 0.05) among diets. The addition of tannins or MCFA did not modify (P = 0.98) the rumen bacterial population, which was affected by sampling day (P < 0.001). The additives inclusion did not affect relative abundances of the main bacterial taxa (P < 0.05), most of them differing across days (P < 0.001). Diversity indexes (Shannon and richness) declined over sampling days (P < 0.05), although some genera emerged after concentrate inclusion. Conclusions. At the doses used in the present experiment, tannins and MCFA did not exert any effect on intake, animal performance and bacterial population. Abrupt transition to high-concentrate diets modified the rumen environment and bacterial community, indicating bacterial adaptation to new environmental conditions. Implications. Abrupt transition of 7-month-old calves from milk/pasture to a high-concentrate diet did not impair rumen microbiota or performance; therefore, the use of feed additives seems unnecessary. © 2021 CSIRO. All rights reserved
Association of insurance disparities and survival in adults with multiple myeloma: A non-concurrent cohort study
Background: Multiple myeloma (MM) accounts for 10 % of all hematological malignancies. As recent advances in MM treatment continue to improve survival rates, socioeconomic barriers need to be identified to ensure equal treatment. This study evaluates the association between insurance status and survival in patients with MM. Methods: This study analyzed patients with MM from the 2007?2016 Surveillance, Epidemiology, and End Results (SEER) Program database. Insurance status was categorized as uninsured, Medicaid, private insurance, and other insurance. Cancer-specific survival was measured at one- and five-years post diagnosis. Results: From 2007?2016, there were 41,846 patients with MM extracted from the SEER database. Those with private insurance had a higher proportion of participants that identified as married (65.5 %), resided in metropolitan cities (90.1 %), and identified as white (76 %) and non-Hispanic (90.8 %). The uninsured group had the highest proportion of Black participants compared to other insurance groups (37.4 %). After adjustment for age, sex, race, ethnicity, marital status, and residence, the likelihood of five-year survival was significantly lower in those respondents with Medicaid (adjusted (adj) Hazard Ratio (HR): 1.44; 95 % Confidence Interval (CI): 1.36-1.53), when compared with private insurance holders. Those who were uninsured had a 26 % increased mortality hazard than those with private insurance (95 % CI 1.04-1.53). Conclusion: After adjustment, insurance status can influence the survival of adults with MM. As treatment modalities for MM continue to advance, the insurance status of a patient should not hinder their ability to receive the most effective and timely therapies.Peer reviewe
Vortex Solutions in Two-Higgs-Doublet Systems
We analyze the existence of string-like defects in a two-Higgs-doublet system
having as gauge group. We are
able to show that, when certain relations among the parameters hold, these
configurations satisfy a set of first order differential equations (Bogomol'nyi
equations) and their energy is proportional to their topological charge.}Comment: 9 page
Complementarity between dark matter direct searches and CENS experiments in models
We explore the possibility of having a fermionic dark matter candidate within
models for CENS experiments in light of the latest COHERENT data
and the current and future dark matter direct detection experiments. A
vector-like fermionic dark matter has been introduced which is charged under
symmetry, naturally stable after spontaneous symmetry breaking. We
perform a complementary investigation using CENS experiments and dark
matter direct detection searches to explore dark matter as well as
boson parameter space. Depending on numerous other constraints arising from the
beam dump, LHCb, BABAR, and the forthcoming reactor experiment proposed by the
SBC collaboration, we explore the allowed region of portal dark
matter.Comment: Matches published version. 21 pages, 5 figures, 2 table
Pretreatment of zero-valent Iron for reactive permeable barriers in Chromium (VI) remediation
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