Constructive updating/downdating of oblique projectors: a generalization of the Gram-Schmidt process

A generalization of the Gram-Schmidt procedure is achieved by providing equations for updating and downdating oblique projectors. The work is motivated by the problem of adaptive signal representation outside the orthogonal basis setting. The proposed techniques are shown to be relevant to the problem of discriminating signals produced by different phenomena when the order of the signal model needs to be adjusted.Comment: As it will appear in Journal of Physics A: Mathematical and Theoretical (2007

Sea state monitoring using coastal GNSS-R

We report on a coastal experiment to study GPS L1 reflections. The campaign was carried out at the Barcelona Port breaker and dedicated to the development of sea-state retrieval algorithms. An experimental system built for this purpose collected and processed GPS data to automatically generate a times series of the interferometric complex field (ICF). The ICF was analyzed off line and compared to a simple developed model that relates ICF coherence time to the ratio of significant wave height (SWH) and mean wave period (MWP). The analysis using this model showed good consistency between the ICF coherence time and nearby oceanographic buoy data. Based on this result, preliminary conclusions are drawn on the potential of coastal GNSS-R for sea state monitoring using semi-empirical modeling to relate GNSS-R ICF coherence time to SWH.Comment: All Starlab authors have contributed significantly; the Starlab author list has been ordered randomly. Submitted to GR

The consequences of including non-additive effects on the genetic evaluation of harvest body weight in Coho salmon (Oncorhynchus kisutch)

<p>Abstract</p> <p>Background</p> <p>In this study, we used different animal models to estimate genetic and environmental variance components on harvest weight in two populations of <it>Oncorhynchus kisutch</it>, forming two classes i.e. odd- and even-year spawners.</p> <p>Methods</p> <p>The models used were: additive, with and without inbreeding as a covariable (A + F and A respectively); additive plus common environmental due to full-sib families and inbreeding (A + C + F); additive plus parental dominance and inbreeding (A + D + F); and a full model (A + C + D + F). Genetic parameters and breeding values obtained by different models were compared to evaluate the consequences of including non-additive effects on genetic evaluation.</p> <p>Results</p> <p>Including inbreeding as a covariable did not affect the estimation of genetic parameters, but heritability was reduced when dominance or common environmental effects were included. A high heritability for harvest weight was estimated in both populations (even = 0.46 and odd = 0.50) when simple additive models (A + F and A) were used. Heritabilities decreased to 0.21 (even) and 0.37 (odd) when the full model was used (A + C + D + F). In this full model, the magnitude of the dominance variance was 0.19 (even) and 0.06 (odd), while the magnitude of the common environmental effect was lower than 0.01 in both populations. The correlation between breeding values estimated with different models was very high in all cases (i.e. higher than 0.98). However, ranking of the 30 best males and the 100 best females per generation changed when a high dominance variance was estimated, as was the case in one of the two populations (even).</p> <p>Conclusions</p> <p>Dominance and common environmental variance may be important components of variance in harvest weight in <it>O. kisutch</it>, thus not including them may produce an overestimation of the predicted response; furthermore, genetic evaluation was seen to be partially affected, since the ranking of selected animals changed with the inclusion of non-additive effects in the animal model.</p

The America Economic Crisis Of 2009/2010: Three Pillars Of American Strength That Will Lead To Recovery

The notion of the Fall of the American Empire (Wojtowicz, 1993) is equivalent to the Peter Principal in that positive realization will always prevail over the negative perspective. Wojtowicz (1993) contends that Isaac Asimov wrote his foundation stories to show that every empire, even the most powerful one, has to fall eventually. Lawrence Peter (1984), an educator and hierarchiologist, argued that each manager will rise to the level in which he or she will fail. Inevitably, the Peter Principal failed because it placed a negative connotation on managerial growth. The same thing holds true with the Failure of the American Empire. America cannot fail because while there are many foundations of strength that has held America together since the American Revolution, there are three pillars that will help America continue to prosper. The three pillars are the strength of the military, the excellent education system, and the spirit of democracy that has led to capitalism. The spirit of democracy as Abraham Lincoln exemplifies as &ldquo;A government of people, by the people, for the people,&rdquo; has kept America vibrant and open for people to rise to the highest office in the free world (Powell and Powell, 1918). In the philosophical Age of Enlightenment, John Locke, a puritan in the England of Cromwell, put forth a new civil order: law based on reason, a government deriving its power from the governed, liberty to pursue individual goals as a natural right, and private property and its use in the pursuit of happiness (Wren and Bedian, 2009). These four ideas provide the bases of how our founders designed the America of today. This paper provides an overview of the three pillars that will influence the economic recovery of America in a positive way

Energy transition for better air quality: a public health issue

The World Health Organization is a specialized agency of the United Nations concerned with international public health. Problems raised by indoor air quality are at the heart of its mission and action. Causing over 3.3 million deaths every year, domestic air pollution is particularly prevalent in regions where income is low or modest, as households will often use highly polluting energy sources for heating and cooking. It is estimated that over half of the world’s population uses sources of energy for heating and cooking whose fumes are toxic to human health and the environment. Soot particle pollution is extremely toxic for the airways and is something that women and children are particularly exposed to. Indoor air pollution is responsible for serious illnesses like pneumonia and heart disease. There are innumerable political and economic obstacles to energy transition in such regions. It is essential to initiate dialogue and cooperation between politicians and public health specialists to alert public opinion to the relationship between air quality and climate change and to enact public health policies that will anticipate and prevent pollution rather than remedy it subsequently. It is equally essential to stress the importance of cooperation between public health actors and those sectors of the economy that generate the most pollution, in order to bring about meaningful changes in public health

A competitive scheme for storing sparse representation of X-Ray medical images

A competitive scheme for economic storage of the informational content of an X-Ray image, as it can be used for further processing, is presented. It is demonstrated that sparse representation of that type of data can be encapsulated in a small file without affecting the quality of the recovered image. The proposed representation, which is inscribed within the context of data reduction, provides a format for saving the image information in a way that could assist methodologies for analysis and classification. The competitiveness of the resulting file is compared against the compression standards JPEG and JPEG200

Control of the chemical composition and thickness of deposited coatings over carbon nanotubes using acrylic acid plasma

In this study, it is demonstrated that the surface of carbonnanotubes can be coated with a polymer nanometer size film (nanocoating) with tailored surface polar behavior when treated with acrylic acid plasma. The polar behavior of the polymer nanocoating can be hydrophilic or hydrophobic depending deposition and erosion processes caused by ionized species in the plasma. In turn, deposition and erosion can be controlled by plasma power. Deposition dominates at 20 W power, where a significant amount of polymer nanocoating is produced with carboxylic acid functional groups in the surface thus having an hydrophilic behavior. On the contrary, a smaller amount of polymer nanocoating with hydrophobic behavior (i.e. without any functional groups on its surface) suggests that erosion isthe dominant process when 40 W power is used. Finally, a competition between deposition and erosion processes results in different polar behavior and amount of polymer nanocoating depending of the treatment time

Residual contamination detection and serovar distribution of Listeria monocytogenes isolates in pork slaughterhouse and cutting facilities in province of Quebec

L. monocytogenes (L. mono) is recognised as a zoonotic foodborne pathogen. Its control is focused on the “Readyto Eat” food production level. Recently, Health Canada had reinforced its “Policy on L. mono in Ready-to-Eat Foods”, highlighting environmental surveillance and control of meat processing facilities as important risk reduction tools. The industry wants to improve its management of L. mono risk, taking into account previous steps of meat production. Nowadays, few information are available on the presence, distribution and types of strains in the environments concerning this pathogen in pork slaughterhouses and cutting facilities in Canada. Our objective was to detect and described residual L. mono contamination and analyse serovars distribution in different areas in the pork production continuum in and between slaughterhouses and cutting facilities in province of Quebec, during a one year period. Such data are a pre-requisite to achieve the optimization of the management measures by the industrials

Modular multilevel matrix converter as solid state transformer for medium and high voltage substations

The use of power converters as solid state transformer is an attractive solution to modernize the power network, but this solution has not been fully addressed for MV and HV substations. This paper presents a customized and simple control for the Modular Multilevel Matrix Converter (M3C), specially conceived for its operation on synchronous ports, which is the case of AC substations. The control allows to transfer bidirectional active power, generate/absorb reactive power and provide ancillary services. The converter is compared to the back-to-back Modular Multilevel Converter (B2B-MMC) where the key performance indicators to carry out the comparison are power efficiency, number of semiconductor devices, passive components required, footprint, voltage cell balance, fault blocking capability and stress of components. The simulation results show the features, performance and attractiveness of the M3C topology in a 33/11 kV, 16 MW substation under different operating conditions, including grid faults and dynamic operation. The M3C presents similar efficiency and performance than the B2B-MMC, but it uses less semiconductor devices, passive components and total cell capacitor energy than the B2B-MMC, reducing cost and footprint. The experimental results show the performance of the M3C under less ideal conditions including a substation transformer saturation and power step response