Mostrando recursos 61 - 80 de 192,268

  1. Telomere length analysis in crustacean species: Metapenaeus macleayi, Sagmariasus verreauxi, and Jasus edwardsii

    Rosamond M. Godwin; Stewart Frusher; Steven S. Montgomery; Jennifer Ovenden
    Estimates of age and growth in crustaceans have been historically problematic and presented significant challenges to researchers. Current techniques of age determination provide valuable data, but also suffer from disadvantages. Telomeric DNA has been proposed as an age biomarker because it shortens with age in some species. In this study, the feasibility of using telomere length (TL) to estimate age was examined in the school prawn Metapenaeus macleayi and the spiny lobsters Sagmariasus verreauxi and Jasus edwardsii. Carapace length (CL) was used as a surrogate for age, and terminal restriction fragment assays were used to test the relationship between TL...

  2. Mapping the zoonotic niche of Lassa fever in Africa

    Jane P. Messinab; Daniel J. Weissb; Catherine L. Moyesa; Nick Goldinga; Simon I. Haya
    Background: Lassa fever is a viral haemorrhagic illness responsible for disease outbreaks acrossWest Africa. It is a zoonosis, with the primary reservoir species identified as the Natal multimammatemouse,Mastomys natalensis. The host is distributed across sub-Saharan Africa while the virus ’ range appears to be restricted to West Africa. The majority of infections result from interactions between the animal reservoir and human populations, although secondary transmission between humans can occur, particularly in hospital settings. Methods: Using a species distributionmodel, the locations of confirmed human and animal infections with Lassa virus (LASV) were used to generate a probabilistic surface of zoonotic transmission...

  3. L Not missing the train of history!

    Molina Joaquim; São Paulo Brasil; Joaquim Molina
    Para não perder o trem da história!

  4. Learning Application Models for Utility Resource Planning


    Abstract — Shared computing utilities allocate compute, network, and storage resources to competing applications on demand. An awareness of the demands and behaviors of the hosted applications can help the system to manage its resources more effectively. This paper proposes an active learning approach that analyzes performance histories to build predictive models of frequently used applications; the histories consist of measures gathered from noninvasive instrumentation on previous runs with varying assignments of compute, network, and storage resources. An initial prototype uses linear regression to predict application interactions with candidate resources, and combines them to forecast completion time for a candidate...

  5. A Taxonomy of Tasks and Visualizations for Casual Interaction of Multimedia Histories

    Charlotte Tang; Gregor Mcewan; Saul Greenberg
    Many groupware systems now allow people to converse and casually interact through their computers in quite rich ways—through text, images, video, artifact sharing and so on. If these interactions are logged, we can offer these multimedia histories to a person in a manner that makes them easy to review. This is potentially beneficial for group members wishing to find and reflect on their past interactions, and for researchers investigating the nuances of online communities. Yet because we have little knowledge of what people would actually do with these histories, designing an effective history review system is difficult. Consequently, we conducted...

  6. Session T2G Importance of Teaching the History of Technology

    Sridhar Condoor
    concepts, methods and tools. The education community seldom focused its attention on teaching the historical aspects of engineering and technology. As a result, students know very little about famous engineers, case histories, evolution of engineering science and technology, and influence of engineering activity on the society. The reading of engineering case histories emphasize the role of human error/failure in engineering design, the practice of engineering as an art form, and the difference between engineering and scientific activities. Due to the synergy between the product evolution and the product design, case histories can improve student learning in the capstone design courses....

  7. $rec.titulo


    One of the originating concepts of this conference is the notion that we have reached a second wave of digital analysis and critique; no longer plain vanilla technophiles, blue sky phantasists, or Luddites, we have gone beyond. One could only expect there to be room for improvement at this relatively early moment of academic inquiry into and critical professionalization of digital culture; extant theories of the digital and the virtual leave room for critique. I am drawing on a loose metaphor from the three waves of feminism to suggest that digital technologies have issues sui generis which flow from one...

  8. Experiments in UNIX command prediction

    Brian D. Davison; Haym Hirsh
    Most users demonstrate regularities in their work with a computer system. Even when a user’s activities are unique, those interactions often exhibit systematic patterns. Accordingly, there has been a range of work developing systems that recognize regularities in computer usage (Cypher 1993; Mitchell et al. 1994; Schlimmer & Hermens 1993). Our current effort is to consider different methods that would enable us to build similar pattern-recognition into the UNIX command shell (Hirsh & Davison 1997; Davison & Hirsh 1997), although the concept of command prediction is similarly applicable to other user interfaces. The prediction of a user’s next command by...

  9. Fancy a Schmink? A Novel Networked Game in a Café

    Mathew Lipson; Jenny Hyams; Kate Shaw; Josephine Reid; Josephine Reid
    mobile games, wireless games, handheld devices, entertainment In this paper we describe a week long public field trial called Schminky. Based on our findings from the trial we consider the design implications for spontaneous, networked sound-based games. The venue for the trial was a café in a digital media centre. The paper reflects on the role of place and the notion of embedded histories.

  10. Diploma Thesis Mining Version Histories to Guide Software Changes

    Thomas Zimmermann; Advisor Prof; Dr. Andreas Zeller; Referees Prof; Dr. Gregor Snelting; Prof Dr; Burkhard Freitag; Lehrstuhl Für Softwaresysteme; Universität Passau
    We apply data mining to version histories in order to guide programmers along related changes: “Programmers who changed these functions also changed... ”. Given a set of existing changes, such rules (a) suggest and predict likely further changes, (b) show up coupling that is undetectable by program analysis, and (c) prevent errors due to incomplete changes. Our approach consists of two phases: • Preprocessing mirrors a complete version history in a database, and searches for finegrained changes—that are changes on functions rather than on complete files. • Mining creates the rules that are used for recommendations. We developed our own...

  11. $rec.titulo


    introduction to spacetime crystallography Ordinary crystallography deals with regular, discrete, static arrangements in space. Of course, dynamic considerations— and thus the additional dimension of time—must be introduced when one studies the origin of crystals (since they are emergent structures) and their physical properties such as conductivity and compressibility. The space and time of the dynamics in which the crystal is embedded are assumed to be those of ordinary continuous mechanics. In this paper, we take as the starting point a spacetime crystal, that is, the spacetime structure underlying a discrete and regular dynamics. A dynamics of this kind can be...

  12. iRoundTable A COLLABORATION PLATFORM FOR VIRTUAL AEC ORGANSIZATIONS

    Manfred Vogel; Manfred Breit; Mario Doulis; André Csillaghy; Michael Raps; Markus Benz
    In this paper we give a short overview of ongoing research and development of iRoundTable, a collaboration platform for efficient execution of large complex AEC projects with geographically dispersed interdisciplinary teams. iRoundTable will allow for convenient and task related access to the distributed heterogeneous information of the virtual organization. A suite of tools will support the multi-media communication between the project stake holders. The system will be realized using a grid of loosely coupled software services which can be combined freely at request. User will connect to the platform either via sophisticated multimedia conference systems or via simpler mobile devices....

  13. Professional Development in Advising Black Greek Letter Organizations:

    Dave A. Louis; Sarah L. Louis
    Black Greek Letter Organizations (BLGOs) are very unique organizations and can provide equally as unique experiences for the student affairs professional. BGLOs possess very meaningful histories which play significant roles in each organization’s existence and modus operandi. Any individual who has the opportunity to advise any of the organizations should build a healthy knowledge base of the fraternity or sorority’s place in American history, social relevance and cultural idiosyncrasies. It takes more than the standard cadre of advisory skills to effectively guide a BGLO. Going beyond the norm is what makes advising a BGLO successful. BGLOs consist of historically Black...

  14. article Inferring the History of Population Size Change from Genome-Wide SNP Data

    Christoph Theunert; Kun Tang; Michael Lachmann; Sile Hu; Mark Stoneking
    Dense, genome-wide single-nucleotide polymorphism (SNP) data can be used to reconstruct the demographic history of human populations. However, demographic inferences from such data are complicated by recombination and ascertainment bias. We introduce two new statistics, allele frequency-identity by descent (AF-IBD) and allele frequency-identity by state (AF-IBS), that make use of linkage disequilibrium information and show defined relationships to the time of coalescence. These statistics, when conditioned on the derived allele frequency, are able to infer complex population size changes. Moreover, the AF-IBS statistic, which is based on genome-wide SNP data, is robust to varying ascertainment conditions. We constructed an efficient...

  15. and

    Andrew Mark; Paul Kutler Chief
    0 This work contains the results of a study aimed at the development of two- and three-dimensional numerical proce-dures for computing the flowfield generated by the inter-action of a blast wave and a rigid body. A number of numer-ical procedures were applied to two-dimensional problems including both implicit and explicit algorithms. Each was tried on the blast wave-cylinder interaction problem. MacCormackls method with added fourth-order dissipation yielded the best results and was then applied to the blast wave-truck interaction problems in two dimensions. MacCormack's method was also used in three dimensions to determine the flowfield that results when a blast...

  16. Seasonal variations in the smolt characteristics of juvenile Atlantic salmon (Salmo salar) from estuarine and riverine

    R. A. Cunjak; R. A. Cunjak; R. L. Saunders; E. M. P. Chadwick
    Cunjak, R. A., R. L. Saunders, and E. M. P. Chadwick. 1990. Seasonal variations in the smolt characteristics of juvenile Atlantic salmon (Salmo salar) from estuarine and riverine environments. Can. J. Fish. Aquat. Sci. 47: 81 3-820. Smolt characteristics such as lipid-moisture dynamics, ATPase activity, salinity tolerance, and condition factor were determined for Atlantic salmon parr (Salmo salar) moving to, or residing in, estuaries of two rivers in eastern Canada. Lipid and water content and gill Na+K+--ATPase activity of these parr differed markedly from river-resident parr. ATPase activity, sex ratio, and condition factor indicated more similarity between estuarine parr and...

  17. Retesting of Liquefaction and Non-Liquefaction Case Histories in the Imperial Valley using CPT

    Robb E. S. Moss; Brian D. Collins; Daniel H. Whang; Jonathan P. Stewart; Peer Lifelines Program
    2 This report documents the retesting of liquefaction and non-liquefaction field case histories in the Imperial Valley with the cone penetration test (CPT). The River Park and Heber Road sites were originally tested using a mechanical cone following the 1979 Imperial Valley Earthquake (Bennett et al., 1981; Youd & Bennett, 1983). These two sites are rich in information because they have experienced several earthquakes in recent history, have been subjected to moderate levels of strong ground shaking, the liquefiable soils have appreciable fines content, and the sites contain a number of non-liquefied data points. Recent liquefaction case histories databases (Moss...

  18. Master’s Programme in International Business Management

    Tiina Porkka
    Competition in logistics markets has increased and its nature has become more global. Entering new markets can be too risky alone and that is why mergers and acquisitions can offer benefits. Finding the most effective organizational structure and agreeing common ways of working is not easy inside one company but when two companies with different histories and values are combined, the work is much more demanding. Communication is one of the most important part of any phase of a merger or an acquisition. Choosing the correct way to share information and instructions is crucial for the new company. My objective...

  19. RECENT INVESTMENTS IN HUMAN CAPITAL AND ITS EFFECT ON THE CHANCES OF ESCAPING FROM LOW-PAID JOBS: THE SPANISH CASE

    Maite Blázquez; José Ramos; Amento De; Análisis Económico; Conómica E Historia Económica; Maite Blázquez; Jose Ramos
    General education and training are major forces determining earnings. According to the human capital model, wage differentials among individuals over the life-cycle are largely the result of different patterns of investment in human capital. This paper is intended to analyze the effects of recent investments in human capital – general education, vocational/training or language courses- on workers ’ relative earnings and on the probability of making an upwards transition in the earnings distribution. The analysis is done for Spain, using the European Community Household Panel (1995-2001). Our results reveal that having been recently in education or training (mainly vocational/training courses)...

  20. Los procesos electorales en la Argentina: nuevas herramientas, escenarios y actores

    López Calendino, Sebastián; Solano, Mauro
    El año 2015 ha sido particularmente intenso para la República Argentina en lo que hace a elecciones. El calendario marcó el inicio de esta carrera de largo aliento el 22 de febrero de 2015, con las elecciones primarias en la ciudad de Mendoza y el municipio de San Carlos, habiendo finalizado el recorrido recién el 22 de noviembre, con el estreno de la segunda vuelta para elegir Presidente y Vicepresidente de la Nación. Si miramos por el espejo retrovisor, veremos que en el camino quedaron elecciones primarias en muchas provincias, y a nivel nacional; comicios destinados a elegir cargos locales, provinciales,...

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