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13篇 您的检索式:作者名="Alberto Prieto"
    题名 作者 年代 出处 被引量
1Affinity-Based Network Interfaces for Efficient Communication on Multicore Architectures显示文摘Improving the network interface performance is needed by the demand of applications with high communication requirements (for example, some multimedia, real-time, and high-performance computing applications), and the availability of network links providing multiple gigabits per second bandwidths that could require many processor cycles for communication tasks. Multicore architectures, the current trend in the microprocessor development to cope with the difficulties to further increase clock frequencies and microarchitecture efficiencies, provide new opportunities to exploit the parallelism available in the nodes for designing efficient communication architectures. Nevertheless, although present OS network stacks include multiple threads that make it possible to execute network tasks concurrently in the kernel, the implementations of packet-based or connection-based parallelism are not trivial as they have to take into account issues related with the cost of synchronization in the access to shared resources and the efficient use of caches. Therefore, a common trend in many recent researches on this topic is to assign network interrupts and the corresponding protocol and network application processing to the same core, as with this affinity scheduling it would be possible to reduce the contention for shared resources and the cache misses. In this paper we propose and analyze several configurations to distribute the network interface among the different cores available in the server. These alternatives have been devised according to the affinity of the corresponding communication tasks with the location (proximity to the memories where the different data structures are stored) and characteristics of the processing core. As this approach uses several cores to accelerate the communication path of a given connection, it can be seen as complementary to those that consider several cores to simultaneously process packets belonging to either the same or different connections. Message passing interface (MPI) workloads and dynamic web servers have been considered as applications to evaluate and compare the communication performance of these alternatives. In our experiments, performed by full-system simulation, improvements of up to 35% in the throughput and up to 23% in the latency have been observed in MPI workloads, and up to 100% in the throughput, up to 500% in the response time, and up to 82% in the requests attended per second have been measured in dynamic web servers.Andrés Ortiz Julio Ortega Antonio F.Díaz Alberto Prieto 2013Journal of Computer Science & Technology2013,28,3:3
2Natural fiber composites of high temperature thermo plastic polymers显示文摘 ALBERTO PRIETO 2002Effects of Coupling Agents J Appl Polym Sci2002,86,9:1
3Tissue-Specific N-Terminal Isoforms from Overlapping Alternate Promoters of the Human AE2 Anion Exchanger Gene显示文摘Juan F. Medina Jon Lecanda Alberto Ac??n Pawel Ciesielczyk Jesús Prieto 2000Biochemical and Biophysical Research Communications2000,,1:1
4Determination of oxadiazon residues by headspace solid -phase microextraction and gas chromatog- raphy - mass spectrometry 显示文摘Alberto Navalon Avismelsi Prieto 2002Journal of Chromatography A2002,946,12:1
5A computer vision system for early detection of anthracnose in sugar mango(Mangifera indica)based on UV-A illumination显示文摘The present work describes the development of a computer vision system for the early detection of anthracnose in sugar mango based on Ultraviolet A illumination(UV-A).Anthracnose,a disease caused by the fungus Colletotrichum sp,is commonly found in the fruit of sugar mango(Mangifera indica).It manifests as surface defects including black spots and is responsible for reducing the quality of the fruit.Consequently,it decreases its commercial value.In more detail,this study poses a system that begins with image acquisition under white and ultraviolet illumination.Furthermore,it proposes to analyze the Red,Green and Blue color information(R,G,B)of the pixels under two types of illumination,using four different methods:RGB-threshold,RGB-Linear Discriminant Analysis(RGBLDA),UV-LDA,and UV-threshold.This analysis produces an early semantic segmentation of healthy and diseased areas of the mango image.The results showed that the combination of the linear discriminant analysis(LDA)and UV-A light(called UV-LDA method)in sugar mango images allows early detection of anthracnose.Particularly,this method achieves the identification of the disease one day earlier than by an expert with respect to the scale of anthracnose severity implemented in this work.Leonardo Ramırez Alberto Carlos Eduardo Cabrera Ardila Flavio Augusto Prieto Ortiz 2023Information Processing in Agriculture2023,10,2:1
6Radioembolization using 90Y-resin microspheres for patients with advanced hepatocellular carcinoma显示文摘Bruno Sangro Jose I. Bilbao Jose Boan Antonio Martinez-Cuesta Alberto Benito Javier Rodriguez Angel Panizo Belen Gil Mercedes Inarrairaegui Ignacio Herrero Jorge Quiroga Jesus Prieto 2006International Journal of Radiation Oncology, Biology, Physics2006,,3:1
7Procalcitonin and C-reactive protein as markers of systemic inflammatory response syndrome severity in critically ill children显示文摘Corsino Rey Marta Los?Arcos Andrés Concha Alberto Medina Soledad Prieto Pablo Martinez Belen Prieto 2007Intensive Care Medicine2007,,3:1
8Implementation of real - time adaptivedigital shaping for nuclear spectroscopy 显示文摘Alberto Regadio Sebastian Sanchez - Prieto ManuelPrieto 2014NuclearInstruments and Methods in Physics Research A2014,735,:1
9A neural learning algorithm for blind separation of source based on geometric properties显示文摘Alberto prieto Carlos GPuntonet Beatriz Prieto 1998Signal processing1998,64,3:1
10Prognostic factors and prevention of radioembolization‐induced liver disease显示文摘Belen Gil‐Alzugaray Ana Chopitea Mercedes I?arrairaegui Jose I. Bilbao Macarena Rodriguez‐Fraile Javier Rodriguez Alberto Benito Inés Dominguez Delia D’Avola Jose I. Herrero Jorge Quiroga Jesus Prieto Bruno Sangro 2013Hepatology2013,,:1
11Transgenic sugarcane plants resistant to stem borer attack显示文摘Ariel Arencibia Roberto I. Vázquez Dmitri Prieto Pilar Téllez Elva R. Carmona Alberto Coego Lázaro Hernández Gustavo A. De la Riva Guillermo Selman-Housein 1997Molecular Breeding1997,,4:1
12Early tacrolimus exposure does not impact long-term outcomes after liver transplantation显示文摘BACKGROUND Tacrolimus trough levels(TTL)during the first weeks after liver transplantation(LT)have been related with long-term renal function and hepatocellular carcinoma recurrence.Nevertheless,the significance of trough levels of tacrolimus during the early post-transplant period for the long-term outcome is under debate AIM To evaluate the effect of TTL during the first month on the long-term outcomes after LT.METHODS One hundred fifty-five LT recipients treated de novo with once-daily tacrolimus were retrospectively studied.Patients with repeated LT or combined transplantation were excluded as well as those who presented renal dysfunction prior to transplantation and/or those who needed induction therapy.Patients were classified into 2 groups according to their mean TTL within the first month after transplantation:≤10(n=98)and>10 ng/mL(n=57).Multivariate analyses were performed to assess risk factors for patient mortality.RESULTS Mean levels within the first month post-transplant were 7.4±1.7 and 12.6±2.2 ng/mL in the≤10 and>10 groups,respectively.Donor age was higher in the high TTL group 62.9±16.8 years vs 45.7±17.5 years(P=0.002)whilst mycophenolate-mofetil was more frequently used in the low TTL group 32.7%vs 15.8%(P=0.02).Recipient features were generally similar across groups.After a median follow-up of 52.8 mo(range 2.8-81.1),no significant differences were observed in:Mean estimated glomerular filtration rate(P=0.69),hepatocellular carcinoma recurrence(P=0.44),de novo tumors(P=0.77),new-onset diabetes(P=0.13),or biopsy-proven acute rejection rate(12.2%and 8.8%,respectively;P=0.50).Eighteen patients died during the follow-up and were evenly distributed across groups(P=0.83).Five-year patient survival was 90.5%and 84.9%,respectively(P=0.44),while 5-year graft survival was 88.2%and 80.8%,respectively(P=0.42).Early TTL was not an independent factor for patient mortality in multivariate analyses.CONCLUSION Differences in tacrolimus levels restricted to the first month after transplant did not result in significant differences in long-term outcomes of LT recipients.Mikel Gastaca Patricia Ruiz Javier Bustamante Lorea Martinez-Indart Alberto Ventoso JoséRamón Fernandez Ibone Palomares Mikel Prieto Milagros Testillano Patricia Salvador Maria Senosiain Maria Jesus Suárez Andres Valdivieso 2021World Journal of Hepatology2021,13,3:0
13Hematotesticular barrier is altered from early stages of liver cirrhosis:Effect of insulin-like growth factor 1显示文摘AIM: The pathogenesis of hypogonadism in liver cirrhosis is not well understood. Previous results from our laboratory showed that IGF-1 deficiency might play a pathogenetic role in hypogonadism of cirrhosis. The administration of IGF-1 for a short period of time reverted the testicular atrophy associated with advanced experimental cirrhosis.The aim of this study was to establish the historical progression of the described alterations in the testes,explore testicular morphology, histopathology, cellular proliferation, integrity of testicular barrier and hypophysogonadal axis in rats with no ascitic cirrhosis.METHODS: Male Wistar rats with histologically-proven cirrhosis induced with carbon tetrachloride (CC14) for 11 wk,were allocated into two groups (n = 12, each) to receive recombinant IGF-1 (2 μg/100 g·d, sc) for two weeks or vehicle. Healthy rats receiving vehicle were used as control group (n = 12).RESULTS: Compared to controls, rats with compensated cirrhosis showed a normal testicular size and weight and very few histopathological testicular abnormalities.However, these animals showed a significant diminution of cellular proliferation and a reduction of testicular transferrin expression. In addition, pituitary-gonadal axis was altered, with significant higher levels of FSH (P<0.001 vs controls) and increased levels of LH in untreated cirrhotic animals. Interestingly, IGF-1 treatment normalized testicular transferrin expression and cellular proliferation and reduced serum levels of LH (P = ns vs controls, and PInma Castilla-Cortázar Nieves Diez María García-Fernández Juan Enrique Puche Fernando Diez-Caballero Jorge Quiroga Matías Díaz-Sánchez Alberto Castilla Amelia Díaz Casares Isabel Varela-Nieto Jesǘs Prieto Salvador González-Barón 2004World Journal of Gastroenterology2004,10,17:0
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