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David Ramirez Dominguez
Rice University
Wireless networkThroughputComputer networkComputer scienceReal-time computing
25Publications
5H-index
116Citations
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Publications 28
Newest
Abstract Video on Demand services generate the largest amount of traffic in networks nowadays. Previous works have proposed integrating Content Delivery Networks (CDN) and Peer-to-Peer (P2P) networks to satisfy this demand. However, their analytical methods do not consider all the factors that affect the performance of these systems. Hence, we present a novel comprehensive framework, based on a fluid model, to evaluate VoD services over hybrid CDN-P2P systems. The proposed framework considers fe...
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Due to the heavy reliance of millimeter-wave (mmWave) wireless systems on directional links, beamforming (BF) with high-dimensional arrays is essential for cellular systems in these frequencies. Thus, performing the array processing in a power-efficient manner is a fundamental challenge. Analog and hybrid BF require few analog-to-digital and digital-to-analog converters (ADCs and DACs), but can only communicate in a small number of directions at a time, limiting directional search, spatial multi...
7 CitationsSource
#2Elza ErkipH-Index: 44
Last. H. Vincent PoorH-Index: 98
view all 3 authors...
A resource-constrained system monitors a source of information by requesting a finite number of updates subject to random transmission delays. An a priori fixed update request policy is shown to minimize a polynomial penalty function of the age of information over arbitrary time horizons. Partial updates, compressed updates with reduced transmission and information content, in the presented model are shown to incur an age penalty independent of the compression. Finite horizons are shown to have ...
4 Citations
#1Michael Deiner (UCSF: University of California, San Francisco)H-Index: 7
#2Cherie A. Fathy (UCSF: University of California, San Francisco)H-Index: 2
Last. Travis C. Porco (UCSF: University of California, San Francisco)H-Index: 42
view all 9 authors...
Social media posts regarding measles vaccination were classified as pro-vaccination, expressing vaccine hesitancy, uncertain, or irrelevant. Spearman correlations with Centers for Disease Control a...
2 CitationsSource
#1Blake M. Snyder (UCSF: University of California, San Francisco)H-Index: 3
#2Sang Min Nam (UCSF: University of California, San Francisco)
Last. Jeremy D. Keenan (UCSF: University of California, San Francisco)H-Index: 27
view all 15 authors...
Purpose Glaucoma screening can be performed by assessing the vertical-cup-to-disk ratio (VCDR) of the optic nerve head from fundus photography, but VCDR grading is inherently subjective. This study investigated whether computer software could improve the accuracy and repeatability of VCDR assessment. Methods In this cross-sectional diagnostic accuracy study, 5 ophthalmologists independently assessed the VCDR from a set of 200 optic disk images, with the median grade used as the reference standar...
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#1Sourjya Dutta (NYU: New York University)H-Index: 6
#2C. Nicolas Barati (NYU: New York University)H-Index: 6
Last. Sundeep Rangan (UCSB: University of California, Santa Barbara)H-Index: 44
view all 6 authors...
Due to the heavy reliance of millimeter-wave (mmWave) wireless systems on directional links, beamforming (BF) with high-dimensional arrays is essential for cellular systems in these frequencies. How to perform the array processing in a power efficient manner is a fundamental challenge. Analog and hybrid BF require fewer analog-to-digital and digital-to-analog converters (ADCs and DACs), but can only communicate in a small number of directions at a time, limiting directional search, spatial multi...
3 Citations
#1Alma EguizabalH-Index: 3
#2Peter J. SchreierH-Index: 18
Last. David Ramirez DominguezH-Index: 5
view all 3 authors...
Statistical shape models enhance machine learning algorithms providing prior information about deformation. A Point Distribution Model (PDM) is a popular landmark-based statistical shape model for segmentation. It requires choosing a model order, which determines how much of the variation seen in the training data is accounted for by the PDM. A good choice of the model order depends on the number of training samples and the noise level in the training data set. Yet the most common approach for c...
1 Citations
#1David Ramirez Dominguez (UCSF: University of California, San Francisco)H-Index: 5
#2Travis C. Porco (UCSF: University of California, San Francisco)H-Index: 42
Last. Jeremy D. Keenan (UCSF: University of California, San Francisco)H-Index: 27
view all 4 authors...
Purpose To determine whether ocular trauma occurs more frequently in the summer months. Design Retrospective, cross-sectional study. Methods The Nationwide Emergency Department Sample (NEDS) is a large, publicly available administrative database that provides nationally representative estimates of emergency department (ED) visits in the United States. Billing codes from NEDS from 2006 to 2013 were used to identify all cases of ocular trauma, and the United States decennial census was used to est...
2 CitationsSource
Service provision over wireless networks is a key performance criterion, yet an onerous task due to the stochastic nature of channels, transmission overhead, and service delay requirements. This paper considers services differentiated by preference without benefit or penalty for early or delayed completion, instead a benefit exists for maintaining the average delay of completed services below a predefined limit. The average delay is constrained at each network instance via joint optimization of ...
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#1Boqiang Fan (Rice University)
#2David Ramirez Dominguez (NYU: New York University)H-Index: 5
Last. Behnaam Aazhang (Rice University)H-Index: 46
view all 5 authors...
Due to abundant frequency resources, millimeter wave (mm-wave) spectrum has drawn much attention as a solution to bandwidth scarcity. However, many characteristics of mm-wave transmissions, such as blockage and reduced coverage, make conventional network architectures very inefficient for use in mm-wave networks. A recently proposed multi-tier mm-wave network architecture allows for relaying around blockages and enlarges the coverage of each base station at an acceptable deployment cost. Neverth...
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