Results 121 to 130 of about 71,267 (166)
Some of the next articles are maybe not open access.
On controlled rotation of an elastic rod
Journal of Applied Mathematics and Mechanics, 1982Plane rotational motions of an elastic rod loaded by a perfectly rigid body and acted upon by a controlling moment of forces, are considered. A system of integrodifferential equations with initial and boundary conditions is obtained. Asymptotic methods are used to obtain the solution of the control problems, close to the two limiting cases: 1) the case
Akulenko, L. D., Bolotnik, N. N.
openaire +2 more sources
Birth Control in India: The Carrot and the Rod?
Family Planning Perspectives, 1977The fall of the Indira Gandhi government seems to validate the prediction made six years ago by demographer Frank Notestein that any attempt by a developing country to force its people to use birth control methods "would be more likely to bring down the government than the birthrate." This author, however, interviewing couples seeking sterilization ...
openaire +2 more sources
End-Temperature Control in a Long Rod
IFAC Proceedings Volumes, 1983Abstract The problem considered is that of the temperature in a semi-infinite rod with the control being applied in the form of heat flux at the near end. The objective is to keep the actual end-temperature close to some desired value over a specified time interval without excessive use of the heat flux control.
openaire +1 more source
Control Rod Signal Multiplexing
IEEE Transactions on Nuclear Science, 1972This paper describes an application of multiplexing and system self-testing to the rod control and status-monitoring system of a Boiling Water Reactor (BWR). The approach uses modularity at the field sensors with minimum interconnecting cables to the control room.
G. C. Minor, S. E. Moore
openaire +1 more source
Magnetically Controlled Growing Rod
Operative Techniques in Orthopaedics, 2016Magnetically controlled growing rods (MCGR) that have Food and Drug Administration clearance since 2014 for the treatment of progressive early onset scoliosis in immature patients at risk for thoracic insufficiency syndrome are designed to reduce the number of planned open surgical procedures for lengthening and minimize the complications of more ...
Behrooz A. Akbarnia, Pooria Hosseini
openaire +1 more source
Stochastic control rod calibrations
Annals of Nuclear Energy, 1991Abstract The problem of estimating reactivity coefficients via small perturbations in a stochastic, linear, discrete model is treated. Considering a small external reactivity insertion as a control term in the point kinetic equation with an unknown parameter (reactivity coefficient), a bank of Kalman filters and a modified version of Magill-Bogler ...
openaire +1 more source
Dependence of Control-Rod Efficiency on the Initial Conditions of Rod Motion
Atomic Energy, 2016The effectiveness of control rods is measured in a nonstationary regime at minimum reactor power. The measurement algorithm entails a buildup of reactor power caused by lifting of the measured or any other rod followed by its release, which is due to the need to maintain a detector signal above the background level up to the end of the experiment.
E. F. Seleznev, I. S. Chernova
openaire +1 more source
NODAL CONTROL OF A VIBRATING ROD
Mechanical Systems and Signal Processing, 2002Abstract The paper deals with the problem of absorbing the harmonic response at a prescribed location in an axially vibrating rod. An explicit formula for the feedback control gain is given. A necessary and sufficient condition for allowing the control to be carried out by a passive element is determined, and the stability of the system is analysed ...
openaire +1 more source
Nuclear Science and Engineering, 1958
A simple method is preserted for calculating full insertion worths of individual black control rods in thermal neutron reactors. Both cruciform and cylindrical rods are treated by a perturbation method which allows for the depression in the perturbed flux in the vicinity of the control rods.
openaire +1 more source
A simple method is preserted for calculating full insertion worths of individual black control rods in thermal neutron reactors. Both cruciform and cylindrical rods are treated by a perturbation method which allows for the depression in the perturbed flux in the vicinity of the control rods.
openaire +1 more source
Magnetically controlled rod fracture is related to rod diameter but lower than TGR
Spine DeformityTo quantify the risk of rod fracture after growth-friendly early-onset scoliosis (EOS) surgery, compare the risk of fracture between magnetically controlled growing rods (MCGR) and traditional growing rods (TGR), and compare the risk of fracture based on rod diameter.EOS patients undergoing TGR or MCGR instrumentation were identified from a large ...
Matthew, Weintraub +12 more
openaire +2 more sources