Electromechanical system with one degree of freedom in mechanical oscillating part and with other degree in rotation a electrical subsystems is investigated by means of numerical solution of derived equations in dimensionless form. The most important nonlinearities are impacts of the main body on the stiff but deformable stop. Other nonlinear effects are introduced into system by the force transformation from unbalance exciter with limited power into the oscillating subsystem and also by nonlinear magnetic flux in the driving electromotor. Presented numerical simulation was focused on the study of the influence of exciting unbalance level on the time histories of oscillations and on phase trajectories. The various responses were shown and discussed in examples. and Obsahuje seznam literatury
Recently, Werner and Stelzer reported C3 gas exchange simultaneous with CAM acid fluctuatíons, i.e., CAM-cycling, in seedlings of the mangrove species Rhizophora mangle L. The potential for CAM-cycling was investigated in mature individuals of R. mangle and of Laguncularia racemosa (L.) Gaertn. f in šitu in southwestem Florida and in seedlings of R. mangle grown in a growth chamber. Only C3 CO2 exchange was observed, while diumal fluctuatíons of tissue acid content were absent. Thus, no evidence for CAM-cycling was found in the field or in the growth chamber for R. mangle, nor in the field for L. racemosa.
In this article, related to a talk given at the International Meeting "Photosynthesis Research for Sustainability-2015", we honor Dr. George C. Papageorgiou, a highly respected scientist and an outstanding teacher and mentor. Praising him for these virtues, indispensable for research sustainability, we also bring to discussion aspects that undermine nowadays both education and research sustainability. We argue that these aspects are principally created by the predominant bureaucratic system, which, by favoring short-term utilitarian orientations and obeying "market laws", jeopardizes university freedom and autonomy, and has turned to "measuring" scientific "production" and establishing accordingly designed funding policies and hiring/firing/promotion criteria, which lead to merit-chasing, grant-hunting, changes in publication practice, and suppression of heterodox ideas. Such system impedes research, creates antagonism, and drives the potentially creative researcher away from originality and discovery, and from the unique satisfaction and benefit that these bring., M. Tsimilli-Michael, P. Haldimann., Název rubriky: Opinion paper, and Obsahuje bibliografii