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14 Result(s)

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  1. No Access

    Article

    Parameter estimation in differential equations, using random time transformations

    Differential equations with measurements subject to errors are usually handled by Least Squares methods or by Likelihood methods based on diffusion-type stochastic modifications of the differential equation. W...

    Bruno Bassan, Ruth Marcus, Isaac Meilijson… in Journal of the Italian Statistical Society (1997)

  2. No Access

    Article

    Distribution and Extent of Damage by Scolytus spp. to Stone and Pome Fruit Orchards in Israel

    During the last decade damage to stone- and pome-fruit orchards in Israel caused by bark beetles has increased. We present data on injury by Scolytus amygdali Geur. and S. rugulosus Muller to nine rosaceous fruit...

    Zvi Mendel, Shaul Ben-Yehuda, Ruth Marcus… in International Journal of Tropical Insect S… (1997)

  3. Chapter and Conference Paper

    Parameter Estimation in Differential Equations, using Random Time Transformations

    Consider the differential equation dX(t) = A(X(t))dt, X(t 0 ) = given, where the function A depends on some unknown (vector) parameter θ to be estimated from a realization X̃(t

    Bruno Bassan, Ruth Marcus, Hovav Talpaz… in Operations Research Proceedings 1993 (1994)

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  4. No Access

    Article

    Modeling temporal progress of plant diseases

    A model for describing temporal progress of plant diseases is presented. The model (termed a ‘mixed’ model) coincides in two special cases with the logistic and the monomolecular models introduced by Vanderpla...

    Ruth Marcus in Phytoparasitica (1990)

  5. Article

    In memoriam

    Ruth Marcus in Phytoparasitica (1990)

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  6. No Access

    Article

    Abstracts of papers presented at the 12th congress of the israeli phytopathological society

    Y. Henis, J. Rotem, Edna Tanne, Ruth Marcus, B. Raccah, E. Dubitzky… in Phytoparasitica (1990)

  7. No Access

    Article

    Abstracts of papers presented at the first Israeli-Italian phytopathological symposium

    R. G. Kenneth, Y. Ankster, J. Manistersh, I. Wahl, J. Manisterski… in Phytoparasitica (1989)

  8. No Access

    Article

    Comparison of different positions and heights of yellow sticky traps for sampling populations of the leafminerLiriomyza trifolii

    A study was carried out to determine the optimal height, position (angle) and direction of yellow sticky traps for maximum attraction ofLiriomyza trifolii flies above gerbera plants. Catches at 30 cm above the pl...

    Shoshana Yathom, Ruth Marcus, M. Chen, Susana Tal in Phytoparasitica (1988)

  9. No Access

    Article

    Abstracts of papers presented at a meeting on Tristeza citrus decline

    Y. Va’adia, Y. Nitzan, A. Zohar, M. Bar-Joseph, Ruth Marcus, I. Ben-Zeev… in Phytoparasitica (1987)

  10. No Access

    Article

    A model for spread of plant disease with periodic removals

    A deterministic model for the spread of infectious disease in a plant population consisting of N interacting groups with periodic removals of the infected plants is considered. In the case of two interacting grou...

    Svetlana Fishman, Ruth Marcus in Journal of Mathematical Biology (1984)

  11. No Access

    Article

    Abstracts of papers presented at the F.E. Nitzany Workshop on Epidemiology and Diagnosis of Plant Viruses

    B. Raccah, Y. Antignus, A. Gal-On, S. Cohen, Adina Rieger-Stein, R. Aly… in Phytoparasitica (1984)

  12. No Access

    Article

    On the spatial distribution of citrus tristeza virus disease

    The spatial spread of citrus tristeza virus (CTV) disease was studied using data from two infected groves. Statistical analysis indicated a spatial grou** of infected trees. A gamma distribution was fitted t...

    Ruth Marcus, Svetlana Fishman, H. Talpaz, R. Salomon, M. Bar-Joseph in Phytoparasitica (1984)

  13. No Access

    Article

    Epidemiological and economic models for spread and control of citrus tristeza virus disease

    Citrus tristeza virus (CTV) causes a most destructive citrus disease in many parts of the world, and indications of natural spread were found in Israel in 1970. The strategy for controlling the disease in Isra...

    Svetlana Fishman, Ruth Marcus, H. Talpaz, M. Bar-Joseph, Y. Oren… in Phytoparasitica (1983)

  14. No Access

    Article

    A note on analyzing ordered alternatives

    A general method of devising stepwise multiple testing procedures with fixed experimentwise error is applied to the problem of non-parametric randomized block design with ordered alternatives. In addition, the...

    Ruth Marcus in Psychometrika (1978)