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Improved PID controller tuning rules for performance degradation/robustness increase trade-off
(2016-09)
Definitely, robustness is an important feature that any control system must take into account, especially considering that the design is usually based on low-order linear models that represent the whole controlled process. ...
Model reference pi controller tuning for second order inverse response and dead time processesand science
(2016-09-06)
In this paper, a One-Degree-of-Freedom PI controller is optimized using the model reference tuning approach for a Second Order Inverse Response and Dead Time Process operating as a servo control. In addition, a graphic ...
The effect of using different reference dates for control exposure measurement on relative risk estimates in a case-control study
(1993-05)
In case-control studies in which case and control enrollment periods are not identical, exposure status for time-dependent variables is often measured relative to a reference date. Using data from a case-control study of ...
Utilización del nematodo entomopatógeno Heterorhabditis atacamensis CIA-NE07 en el control del picudo del banano cosmopolites sordidus en condiciones in vitro
(2015)
Entre las especies de barrenadores del banano, el picudo negro (Cosmopolites sordidus) es la plaga de mayor importancia económica en Costa Rica y a nivel mundial. El control de C. sordidus en sistemas intensivos de producción ...
Comparison of mosquito control programs in seven urban sites in Africa, the Middle East, and the Americas
(2007-10)
Mosquito control programs at seven urban sites in Kenya, Egypt, Israel, Costa Rica, and Trinidad are described and compared. Site-specific urban and disease characteristics, organizational diagrams, and strengths, weaknesses, ...
X-ray screening seems to reduce gastric cancer mortality by half in a community-controlled trial in Costa Rica
(British Journal of Cancer 97, p. 837 – 843, 2007-10-02)
X-ray screening of gastric cancer is broadly used in Japan, although no controlled trial has proved its effectiveness. This study evaluates the impact of an X-ray screening demonstrative intervention to reduce gastric ...
Efecto de cuatro rizobacterias promotoras de crecimiento sobre la pudrición basal causada por Phytophthora capsici en plantas de chile dulce (Capsicum annuum)
(2015)
La pudrición basal causada por Phytophthora capsici es la enfermedad más importante del chile (Capsicum annuum) ya que en el mundo, y en Costa Rica causa grandes pérdidas económicas; son necesarias alternativas al control ...
Sociocultural factors in the control and prevention of parasitic diseases
(Reviews of infectious diseases 4(4):871-879, 1982-07)
Control and prevention of parasitic disease depends on an adequate knowledge of interactions
among factors such as human behavior, the environment, and the life cycles of
parasites. Sociocultural factors in large part ...