Pasadena, CA, United States
Pasadena, CA, United States
Time filter
Source Type

Yamaguchi H.,Agency Systems
ISAP 2016 - International Symposium on Antennas and Propagation | Year: 2016

This paper presents a probability of detection enhancement technique for a maneuvering target with a low radar cross section in time-series Doppler spectrums. The target signal and a noise variance are estimated by the self-organizing model applied to the particle filter and the history of the particle information is used for the detection with a constant false alarm rate. A Monte Carlo simulation is carried out for the performance investigation. The results show that the probability is enhanced, even when a target has a high angular velocity. © 2016 IEICE.

BACKGROUND:: Anticoagulants and hypoglycemic agents are 2 of the most challenging drug classes for medical management in the hospital resulting in many adverse drug events (ADE). OBJECTIVE:: Estimating the marginal cost (MC) of ADEs associated with anticoagulants and hypoglycemic agents for adults in 5 patient groups during their hospital stay and the total annual ADE costs for all patients exposed to these drugs during their stay. RESEARCH DESIGN AND SUBJECT:: Data are from 2010 to 2013 Healthcare Cost and Utilization Project (HCUP) State Inpatient Databases and Medicare Patient Safety Monitoring System (MPSMS). Deidentified patients were linked using probabilistic matching in the same hospital and year for 5 patient groups. ADE information was obtained from the MPSMS using retrospective structured record review. Costs were derived using HCUP cost-to-charge ratios. MC estimates were made using Extended Estimating Equations controlling for patient characteristics, comorbidities, hospital procedures, and hospital characteristics. MC estimates were applied to the 2013 HCUP National Inpatient Sample to estimate annual ADE costs. RESULTS:: Adjusted MC estimates were smaller than unadjusted measures with most groups showing estimates that were at least 50% less. Adjusted anticoagulant ADE costs added >45% and Hypoglycemic ADE costs added >20% to inpatient costs. The 2013 hospital cost estimates for ADEs associated with anticoagulants and hypoglycemic agents were >$2.5 billion for each drug class. CONCLUSIONS:: This study demonstrates the importance of accounting for confounders in the estimation of ADEs, and the importance of separate estimates of ADE costs by drug class. Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.

Agency: European Commission | Branch: FP7 | Program: CSA-CA | Phase: INFRA-2008-3.0.1 | Award Amount: 1.88M | Year: 2009

The South-East European eInfrastructure initiatives aim to ensure equal participation of the region in European networking and Grid computing trends. SEEREN initiative has established regional network and SEE-GRID the regional Grid. SEE-LIGHT project is currently establishing dark-fibre backbone in the region, and SEE-GRID-SCI empowering strategic regional user communities in common use of the eInfrastructure. Close collaboration of National Research & Education Networks and National Grid Initiatives in the region was crucial in materialising this vision. The above initiatives have also raised awareness of national ministries for the necessity of local programmes and financial support for eInfrastructures: a number of ministries have contributed to local network funding and regional interconnections, as well as national Grid programmes. SEERA-EI will capitalise on this momentum and link national-level programme managers and provide an open forum for information exchange, in order to enable coordination of national programmes in eInfrastructures, and to set the framework for a common regional agenda. The project will gather and exchange information regarding current programmes and carry out a state-of-the-art analysis; produce set of best practices and guidelines for national eInfrastructure programmes; and identify areas for joint regional activities, ranging from short-term soft actions, mid-term policy-level actions, to preparatory activities for long-term actions. SEERA-EI will reduce fragmentation of national programmes, create a harmonised approach to national-level initiatives in eInfrastructures, ensure local commitment, and pave the way towards common regional vision, strategy and sustainable cooperation which will give the region a common voice on European and international stage and strengthen the ERA as a whole, enabling collaborative high-quality research across a spectrum of scientific fields.

Cheng B.-N.,Lincoln Laboratory | Wheeler J.,Lincoln Laboratory | Hung B.,Agency Systems
IEEE Communications Magazine | Year: 2013

The increased usage of net-centric IP applications at the tactical edge has pushed DoD communications systems to maximize bandwidth efficiency amid a limited availability of RF spectrum. One method of increasing bandwidth efficiency (especially with the desire to move to IPv6), is the use of IP header compression (IPHC) to compress headers from the network layer and above into small identifiers before sending to the link layer. Although widely used in cell phone technology, the tactical edge provides some unique challenges to traditional IPHC techniques including highly dynamic links and link conditions due to potential jamming threats and difficult environments, multi-hop scenarios due to lack of infrastructure, and a highly diverse set of radio systems lacking interoperability. In this article, we examine two common IP header compression schemes, Robust Header Compression (RFC 5225) and IP Header Compression (RFC 2507) and one experimental scheme, MANET IP header compression, and identify their current use and applicability in the tactical edge. Furthermore, we identify some challenges in implementing header compression schemes in emerging systems. © 2013 IEEE.

Tiranti D.,Agency Systems | Deangeli C.,Polytechnic University of Turin
Frontiers in Earth Sciences | Year: 2015

A method to predict the most probable flow rheology in Alpine debris flows is presented. The methods classifies outcropping rock masses in catchments on the basis of the type of resulting unconsolidated deposits. The grain size distribution of the debris material and the depositional style of past debris flow events are related to the dominant flow processes: viscoplastic and frictional/collisional. Three catchments in the upper Susa Valley (Western Alps), characterized by different lithologies, were selected for numerical analysis carried out with a Cellular Automata code with viscoplastic and frictional/collisional rheologies. The obtained numerical results are in good agreement with in site evidences in terms of depositional patterns, confirming the possibility of choosing the rheology of the debris flow based on the source material within the catchment. © 2015 Tiranti and Deangeli.

Knab J.J.,Agency Systems
IEEE Transactions on Aerospace and Electronic Systems | Year: 2012

Today, the Wideband Global SATCOM (WGS) system employs a new concept of adjusting the transponder power gain of individual links. A simple optimum method is derived for selecting these individual channel gains to minimize the amount of transponder power utilized. This new method directly solves a set of simple nonlinear equations and does not utilize any search algorithms or matrix inversions thus allowing it to be used with any number of links in a transponder. © 2006 IEEE.

Knab J.J.,Agency Systems
IEEE Transactions on Aerospace and Electronic Systems | Year: 2013

The work presented here gives new methods to calculate the required satellite transponder power as well as required terminal power for an entire network of terminals on the transponder. These methods allow the system designer to choose the smallest terminals to meet the required data rates and to see the effects on the required satellite power. Several equations tie together all system parameters for a commercial satellite network including all ground terminals. These results are easily extended to the military case where the transponder gain is specified. © 1965-2011 IEEE.

Agency: GTR | Branch: Innovate UK | Program: | Phase: Innovation Voucher | Award Amount: 5.00K | Year: 2013

We have access to sub contractors that have the expertise required to extract and format data sets. We do not have a chosen supplier yet for IP, design or technological research.

Agency: NSF | Branch: Contract Interagency Agreement | Program: | Phase: ANTARCTIC LOGISTICS SUPPORT | Award Amount: 3.79M | Year: 2014


Loading Agency Systems collaborators
Loading Agency Systems collaborators