3,551 research outputs found

    Some properties for superprocess under a stochastic flow

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    For a superprocess under a stochastic flow, we prove that it has a density with respect to the Lebesgue measure for d=1 and is singular for d>1. For d=1, a stochastic partial differential equation is derived for the density. The regularity of the solution is then proved by using Krylov's L_p-theory for linear SPDE. A snake representation for this superprocess is established. As applications of this representation, we prove the compact support property for general d and singularity of the process when d>1

    Correction of Measurement Error in Monthly USDA Pig Crop: Generating Alternative Data Series

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    The imputed pig death loss contained in the reported monthly U.S. Department of Agriculture (USDA) pig crop data over the December 1995–June 2006 period ranged from 24.93% to 12.75%. Clearly, there are substantial measurement errors in the USDA monthly pig crop data. In this paper, we present alternative monthly U.S. pig crop data using the biological production process, which is compatible with prior knowledge of the U.S. hog industry. Alternative pig crop data are applied to a slaughter hog model and tested comparatively to USDA pig crop. Test results reject the validity of USDA pig crop data in favor of the alternative data.biological production process, measurement error, monthly USDA pig crop data, pig death loss, Agribusiness, Farm Management, Livestock Production/Industries, Q11, Q13, C12,

    Ediacaran Macro Body Fossils

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    This paper, Ediacaran Macro Body Fossils, reports a new discovery of well preserved three dimensional macro body fossils of the Ediacaran Period in central YunNan province in the People's Republic of China. These body fossils will enable more detailed and in-depth exploration of the evolution of multi-cellular macro organisms on this planet, whereas in the past, researches could only rely on cast or imprint fossils

    "One-Stop Shopping" for Ocean Remote-Sensing and Model Data

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    OurOcean Portal 2.0 (http:// ourocean.jpl.nasa.gov) is a software system designed to enable users to easily gain access to ocean observation data, both remote-sensing and in-situ, configure and run an Ocean Model with observation data assimilated on a remote computer, and visualize both the observation data and the model outputs. At present, the observation data and models focus on the California coastal regions and Prince William Sound in Alaska. This system can be used to perform both real-time and retrospective analyses of remote-sensing data and model outputs. OurOcean Portal 2.0 incorporates state-of-the-art information technologies (IT) such as MySQL database, Java Web Server (Apache/Tomcat), Live Access Server (LAS), interactive graphics with Java Applet at the Client site and MatLab/GMT at the server site, and distributed computing. OurOcean currently serves over 20 real-time or historical ocean data products. The data are served in pre-generated plots or their native data format. For some of the datasets, users can choose different plotting parameters and produce customized graphics. OurOcean also serves 3D Ocean Model outputs generated by ROMS (Regional Ocean Model System) using LAS. The Live Access Server (LAS) software, developed by the Pacific Marine Environmental Laboratory (PMEL) of the National Oceanic and Atmospheric Administration (NOAA), is a configurable Web-server program designed to provide flexible access to geo-referenced scientific data. The model output can be views as plots in horizontal slices, depth profiles or time sequences, or can be downloaded as raw data in different data formats, such as NetCDF, ASCII, Binary, etc. The interactive visualization is provided by graphic software, Ferret, also developed by PMEL. In addition, OurOcean allows users with minimal computing resources to configure and run an Ocean Model with data assimilation on a remote computer. Users may select the forcing input, the data to be assimilated, the simulation period, and the output variables and submit the model to run on a backend parallel computer. When the run is complete, the output will be added to the LAS server fo

    Turning Tables, Slicing Pizza, and the Brouwer Fixed-Point Theorem

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    Article published in Mathematics Exchange, 7(1), 2010.Mathematics is everywhere in life. Even within the short dinner time, it helps me solve two big problems. Scene 1: I have confidence in saying that the four legs of my kitchen table have the same length, since it cost me a lot of money. Unfortunately, it wobbles because of my old floor, which I cannot afford to fix right now. Fortunately, the Dyson-Livesay Theorem gives me a cheaper solution. It tells me that I can fix this by just rotating the table by some angle. Connect the four feet of our rectangular table diagonally with two line segments. Then these two segments intersect at some angle α and form two diameters of some sphere S2. (See Figure 1(a), 1(b).) Imagine lifting the table, along with the sphere, high above the ground and let f(x) denote the vertical distance from a point x on that sphere to the floor. This function is clearly continuous on our sphere. The Dyson-Livesay Theorem states that we can find two points p and q on the sphere S2 such that f(p) = f(−p) = f(q) = f(−q) and (p, q) = α. That means, if we rotated the table in space so that the four table feet fit into the locations p,−p,q and −q and lowered it to the floor it would rest firmly. Therefore, the same result can be accomplished by simply turning the table on the ground, while keeping the intersection of the diagonals on the same vertical line

    Stability of Gas Bubbles in a Deformable Material Containing Dissolved Gases

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    This paper analyzes the stability of gas bubbles in a medium which contains dissolved gases and deforms due to creep. The effects of mass diffusion and surface tension on the dynamic behavior of a gas bubble are taken into account. Asymptotic solutions valid for large times are obtained which predict the radius‐time relation, the creep rate, and the rate of diffusion of dissolved gases induced by the growth of a gas bubble in an oversaturated solution. The case where the bubble is situated in a saturated or undersaturated solution is also examined.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70460/2/JCPSA6-56-4-1610-1.pd

    Effects of suction and blowing on oscillatory boundary layers over cylinders

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76977/1/AIAA-3140-792.pd

    The comparative study of the Christology in Latin American liberation theology and Korean Minjung theology

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    This dissertation is fundamentally concerned with the comparative study of Christology in latin American liberation theology and Korean minjung theology. To meet this task the Christology of the former is examined in relation to that of the latter. The study is divided into three parts. Part one contains chapter I through to III. Chapter I is a presentation of liberation theology's motive which takes the suffering people in the current socio-economic political situation as the starting point for a politics-oriented Christology. Chapter II shows the detailed analysis of liberation theology's methodology which is definitely grounded in the principles of the social sciences. Chapter III consists of seeking to interpret Jesus, his words and deeds in the light of the Latin American conditions. Part two, which constitutes chapter IV through to VI, will try to examine a way of thinking about minjung theology within the same categories which we concentrate on the development of liberation theology and its Christological implication in part one, because the clarification between them is necessary for the purpose of this thesis. It may help to solve some of the suspicion whether the label minjung theology is practically synonymous with the label liberation theology in creating a new and appropriate mode of an adequate Christology for answering to the vital needs of the poor and oppressed today. In this observation, have liberation theology and minjung theology anything to say to each other? It is natural for the Christian church to look to them for light on the question. In this desire, part three in chapter VII through to X begins a comparative and critical discussion of the motive, methodologies and Christological implications of the two theologies

    Tihei Mauri Ora: A Māori response to health disparities

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    Māori bear a disproportionate burden of health problems which, in concert with other factors (e.g. poor housing, low socio-economic status and low education attainment), contribute to and maintain low health status. It is noted that there have been multiple attempts to reduce health inequities – however, such attempts have been largely unsuccessful. Barriers to success include government reticence, restrictions on Māori participation in determining health directions/solutions, current contract paradigms and a reluctance to engage in meaningful partnerships with Māori. Those barriers occur within a cultural framework which defines (and therefore prioritises) the health of an individual over the needs of the collective. The hypothesis of this research is that Māori health disparities are best addressed via the development and delivery of Māori health models by services which are oriented to kaupapa Māori principles. Utilising a case study approach, this thesis looks at the outcomes generated when a kaupapa Māori service applies key Māori principles to health service delivery. The case study, in tandem with focus group interviews identifies the key elements necessary to developing services which are responsive to the needs of Māori. This study identified the importance of promoting change (and ultimately improve Māori health status) that encompasses the formation of a framework which considers collective benefit over individualism, encompasses Māori values, acknowledges and accepts Māoricentric clinical interventions. In addition, the thesis asserts that Māori health status will improve once Māori are active participants rather than recipients of health services

    Mapks Regulate Nuclear Import Of Human Papillomavirus Type 11 Replicative Helicase E1

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    Papillomaviruses (PV) are prevalent pathogens that infect human or animal squamous epithelia. Its genome is a double strand circular DNA of approximately 7.9 kb. It contains origin of replication (ori) and encodes early viral proteins for viral DNA amplication, and late capsid proteins for packaging viron. The viral DNA replicates as extrachromosomal nuclear plasmid in the host cell. Infections by low risk virus, such as HPV-6 and -11, can result in benign papillomas, condylomata, and low grade squamous intraepithelial dysplasias (SIL), whereas infection by high risk virus, such as HPV-16 and -18, can progress to high grade SIL, carcinoma in situ, and cancers in which the viral genome may integrate into the host chromosome. Over 99% of cervical cancers are associated with high risk HPV infection. Currently, there is no reliable therapeutic treatment to HPV infections. Thus, it is important to have a thorough understanding on the regulation of viral DNA replication. HPV DNA replication required host DNA replication machinery and two of the viral proteins, the E2 ori binding protein and E1 replicative DNA helicase. E1 is a 68 kDa nuclear phosphoprotein and due to its high molecular weight, it can not enter nucleus by passive diffusion. In this dissertation, we investigated the mechanisms and regulation of E1 nuclear import, and the potential clinical application of our finding is discussed
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