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Topic: Control reversal


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In the News (Mon 21 Dec 09)

  
  Nanocaps help scientists control magnetism reversal
In this case, the scientists applied a reverse magnetic field to the already magnetized nanocaps, and then analyzed how the magnetization reversal evolved in individual caps.
Previous theories used to describe flat film layers don’t describe the magnetism reversal for the different cases of curved film.
Because the scientists have control over the film curvature – and subsequently over anisotropies and magnetic properties – the discovery has opened up doors to the possibilities of tailoring magnetism reversal for new nanoscale applications.
www.physorg.com /news11380.html   (796 words)

  
  Device for controlling reversal points of a reciprocating machining member - Patent 4504917
Control circuit 5 also includes a monitoring or supervising circuit 24 in part for disabling compensating circuits 9 and 9a upon detecting an error in the lower and upper reversal points manually selected via potentiometers 2 and 3.
Should the actual reversal point at the lower end of the tool carrier's stroke path coincide with preselected lower reversal point, the difference signal at the output of rectifier 13 will be of zero voltage, the sum of the preceding difference or error signals being transferred from memory 16 through added 14 to memory 15.
A stroke length control circuit 5 according to the present invention is provided with means for automatically increasing (or decreasing) the distance between the selected lower reversal point and the initial lower reversal point in accordance with increasing (or decreasing) stroke length of carrier 55 as determined by the setting of potentiometers 2 and 3.
www.freepatentsonline.com /4504917.html   (4026 words)

  
 841. Mineral oils and waxes (WHO Food Additives Series 35)
In the reversal study (dosed at the 2% level only), food intake was increased in all male groups, including the HSW group, throughout the study.
Livers of female rats in the control and 2% dose groups from the main and reversal studies (excluding the coconut oil group) were subsequently analyzed for content of hydrocarbons of different chain length.
A reversal period of 1 year should also be included, in order to determine whether the granulomatous hepatic lesions observed in rats in the 90-day studies are fully reversible.
www.inchem.org /documents/jecfa/jecmono/v35je10.htm   (5830 words)

  
 Variable resolution control system - Patent 4782285
In accordance with the method and apparatus of the present invention, the output of a given control device, such as a potentiometer having a given range of adjustment, is converted to an output having an effectively larger range of adjustment having greater resolution beyond the capability of the original control range.
If the input control device is not continuously variable but has stops, a detection is made when the remaining adjustment in the control device is insufficient to cover the range of output remaining of the predetermined number of output steps produced by the processor.
If control device 10 has a limited range of movement, a point will be reached such that the operator will be approaching the end limit of the control device faster than the output of D/A converter 16 is approaching the end of its total of 4,096 steps in the given example.
www.freepatentsonline.com /4782285.html   (4203 words)

  
 Rolling ring linear drive & actuator for reciprocating linear motion - Amacoil
Using the same lever attached to the reversal mechanism, the end stops may be slightly re-configured to make the RG linear drive decelerate to a point where the drive dwells until the reversal a mechanism is actuated.
By the time the linear drive reaches the end stop, and the reversal mechanism is fully flipped, linear speed is almost zero because the V-Cam has rotated the reversal mechanism to the point where the rolling ring assembly is almost at its zero pitch position.
Fine tuning of the linear drive's reversal points is possible simply by turning the control knobs until the end stops move to the desired position.
www.amacoil.com /html/page3d.htm   (1206 words)

  
 Vasectomy reversal (vasovasostomy) - Quest Diagnostics Patient Health Library
A vasectomy is considered a permanent method of birth control.
Vasectomy reversal (vasovasostomy) reconnects the tubes (vas deferens) that were cut during a vasectomy.
Vasectomy reversal is usually an outpatient procedure without an overnight stay in the hospital.
questdiagnostics.com /kbase/topic/detail/surgical/hw227277/detail.htm   (343 words)

  
 The Reversal Procedure
Each year, a number of men elect to have a reversal of their vasectomy, often because of a change in their lives, such as having a new spouse through remarriage, and the desire for a second family, or a change in family planning goals within the same marriage.
The reversal procedure is performed for about 50,000 men each year; a number that is growing with the more widespread availability of the procedure, reduced cost factors, and the training and experience of more surgeons who perform it.
A vasectomy reversal is considered to be comparatively safe, but it is a more delicate and involved microsurgical procedure than a vasectomy.
www.vasectomy.com /ProcedureDetail.asp?id=11&siteid=R   (652 words)

  
 LABQUAKE From Barnstead/Thermolyne - Biocompare Product Review
The reversal control bar must be turned so that it is at right angles to the motor case and pointing toward it.
The reversal control bumper which is at one end of the reversal control bar hits one side of motor case.
Also, the reversal control bar can be turned so that it is parallel to the motor case, so it will not touch the motor case, allowing for the complete, continuous rotation of the clip bar.
www.biocompare.com /prorev.asp?profrevid=133   (483 words)

  
 Reversing Birth Control: Getting a Vasectomy Reversal   (Site not responding. Last check: 2007-10-21)
A vasectomy reversal is a surgical procedure used to reverse the effects of a vasectomy.
Men who have reversals within three years of their original vasectomy are much more likely to have sperm mix with their ejaculate again.
Unfortunately, the cost of a vasectomy reversal tends to be quite high and these surgeries aren’t generally covered by insurance.
www.epigee.org /guide/vasectomy_reversal.html   (914 words)

  
 REVERSAL FILM
Reversal film was engineered as a one-step, cost effective system that originates much as a slide in still photography (identical film).
After developing, the images are ready for immediate screening and is usually a one-of-a-kind reel of film that should be carefully protected as if it were a negative.
Reversal was popular because the cost of a print was not necessary but the down side of reversal is that it's a little tricky to process and few labs develop it anymore.
www.jamesarnett.com /guidebook/1-1-9-2.html   (148 words)

  
 Longitudinal Control Requirements   (Site not responding. Last check: 2007-10-21)
Control power is usually critical in sizing the tail.
Drag divergence is used as a measurement of likelihood of elevator control reversal.
Control requirements at low speed are usually critical.
adg.stanford.edu /aa241/stability/longitudinalcontrol.html   (670 words)

  
 Inside-Out Displays
For reasons given in Chapter 3, it was thought that foreground occlusions might reduce this problem, resulting in a performance measure for the foreground occlusion effect.
Despite the congruence between inside-out displays and the view out the window of the cockpit, inside-out displays are prone to a misinterpretation known as a ``control reversal''.
When a control reversal occurs, the pilot inadvertently attempts to control the representation of the ground, rather than of the plane.
www.hitl.washington.edu /publications/r-98-11/node24.html   (769 words)

  
 Team-corida
The first one concerns the control, the optimal control and the stabilization of systems governed by pde's, and their numerical approximations.
This frequency approach has been proposed first by K. Liu for bounded control operators (corresponding to internal control problems), and has been recently extended to the case of unbounded control operators (and thus including boundary control problems) by L. Miller [54].
This phenomenon [44] is a direct consequence of the reversibility of the wave equation in a non dissipative medium.
www.inria.fr /rapportsactivite/RA2004/corida/uid18.html   (839 words)

  
 Vasectomy reversal (vasovasostomy)
A vasectomy is considered a permanent method of birth control.
Vasectomy reversal (vasovasostomy) reconnects the tubes (vas deferens) that were cut during a vasectomy.
Vasectomy reversal is usually an outpatient procedure without an overnight stay in the hospital.
www.webmd.com /infertility-and-reproduction/Vasectomy-reversal-vasovasostomy   (419 words)

  
 Mine Safety and Health Administration (MSHA) - Code of Federal Regulations - 30 CFR 57.4760
Shaft mines shall be provided with at least one of the following means to control the spread of fire, smoke, and toxic gases underground in the event of a fire: control doors, reversal of mechanical ventilaton, or effective evacuation procedures.
If used as an alternative, effective evacuation shall be demonstrated by actual evacuation of all persons underground to the surface in ten minutes or less through routes that will not expose persons to heat, smoke, or toxic fumes in the event of a fire.
If the destruction of any bulkhead on an inactive level would allow fire contaminants to reach an escapeway, that bulkhead shall be constructed and maintained to provide at least the same protection as required for control doors under Table C-3.
www.msha.gov /30CFR/57.4760.htm   (590 words)

  
 More About Aircraft Attitude and Steering Displays
All pilots do learn to control flight attitude by reference to the artificial horizon, and by the time they qualify for an instrument rating they have long since learned the correct responses to the display's indications.
In addition to responding immediately to control inputs, changes in flight path direction were indicated by having the airplane symbol move laterally from the display center parallel to the horizon in proportion to the rate of turn.
An unaugmented pictorial display that served as a control condition presented a simplified view of an airport scene that was responsive to the changing attitude and flight path of the simulated airplane.
www.aero.ca /e_horizon_reversal.html   (1042 words)

  
 Vasectomy and Vasovasostomy (Reversal Surgery)   (Site not responding. Last check: 2007-10-21)
An expert panel has recommended that vasectomy reversal is not warranted to prevent prostate cancer and that screening criteria for prostate cancer should be the same for men with and without vasectomies.
The main reasons for requesting a reversal are remarriage, the death of a child, or an improvement in finances.
Reversal may also be performed to relieve postvasectomy pain, which occurs in a small percentage of men.
www.morehead.org /wellconnected/000037.htm   (8882 words)

  
 The Wright Brothers | Perfecting the Control System
The new fixed vertical rudder seemed to cure the control reversal problem they experienced in 1901—at least most of the time.
To solve the control reversal problem, the Wrights made the rudder movable, so its position could be coordinated with the wing-warping.
They connected the rudder control cables to the wing-warping hip cradle, so a single motion by the pilot operated both controls.
www.nasm.si.edu /wrightbrothers/fly/1902/perfecting.cfm   (247 words)

  
 Birth Control - Birth Control - Vasectomy Reversal - A Personal Story
At the time, I never gave a thought for vasectomy reversal in the future.Many years later I was divorced, and it was not long before I was thinking about having the vasectomy reversed.
I knew that getting a vasectomy reversal was not likely to be possible in the Philippines, so if ever I was going to have one, it had to be there and then, while still in England.I fixed the vasectomy reversal operation for just 3 weeks before I left the country.
But since their introduction they have placed themselves into a commanding position into one's family life.History of birth control pillsThe term birth control pill is usually referred to the group of drugs used by females to avoid pregnancy.
www.allbirthcontrol.info /a1/birthcontrol-16.html   (1261 words)

  
 Vasectomy Reversal
Sterilization Reversal - Tubal Ligation Reversal or Vasectomy Reversal
Almost 10% of men, who undergo vasectomy, change their mind at a later stage in life and look for means to either revert the process or be able to father children through medical intervention or assistance.
The desire for a vasectomy reversal can come from two main causes: divorce or relationship break up, and a change in financial circumstances that makes having a baby affordable whereas before, at the time of the vasectomy, it may not have been.
www.your-vasectomy-reversal.com   (718 words)

  
 Team-Corida:Frequency domain methods for the analysis and control of systems governed by pde's
Our approach is based on an original characterization of exact controllability of second order conservative systems proposed by K. Liu [44].
This frequency approach has been proposed first by K. Liu for bounded control operators (corresponding to internal control problems), and has been recently extended to the case of unbounded control operators (and thus including boundary control problems) by L. Miller [47].
This phenomenon [38] is a direct consequence of the reversibility of the wave equation in a non dissipative medium.
www.inria.fr /rapportsactivite/RA2005/corida/uid18.html   (845 words)

  
 Epigee Birth Control Guide   (Site not responding. Last check: 2007-10-21)
Depo-provera is a estrogen-free three-month birth control injection.
Long Term Birth Control: For women who are interested in worry-free birth control that lasts a year or more, the IUD is often recommended by doctors.
A new birth control pill is on the horizon that promises freedom from menstruation.
www.epigee.org /guide   (746 words)

  
 KODAK: Kodak 16mm Film - Post Production Films - Color Internegative II Film 7272
The reversal LAD control film specified may be made on EASTMAN EKTACHROME Film 7240 flashed and processed to Status M densities of Red 1.10, Green 1.10, and Blue 1.10.
Printer setup (speed, bulb voltage, TRIM, filtration, etc.) is determined by printing the large gray patch in the LAD Control Film to the specified Laboratory Aim Density values on the duplicating film, chosen to be at the center of the usable straight-line portion of the duplicating film's characteristic curves.
*The LAD control method is described in the paper "A Simplified Motion-Picture Laboratory Control Method for Improved Color Duplication," by John P. Pytlak and Alfred W. Fleischer in the October 1976 SMPTE Journal.
kodak.com /US/en/motion/16mm/products/lab/7272.jhtml?...&lc=en   (1036 words)

  
 SSRN-The Reform of EU Merger Control - Fundamental Reversal or Mere Refinement? by Arndt Christiansen
EU Merger Control is currently undergoing its most profound reform to date, central to which is the more economic approach.
The new Merger Control Regulation, which entered into force on May 1, 2004, brought inter alia changes in jurisdiction, procedural modifications and a shift in the prohibition criterion from market dominance to significant impediment to effective competition (SIEC).
Christiansen, Arndt, "The Reform of EU Merger Control - Fundamental Reversal or Mere Refinement?" (April 25, 2006).
papers.ssrn.com /sol3/papers.cfm?abstract_id=898845   (444 words)

  
 PERMANENT DIABETES CONTROL AND REVERSAL OF HEART DISEASE  NEWS RELEASE
RK confirmed through his official blood-test results that permanent control of diabetes is most certainly possible and that the innovative treatment can be easily implemented and taught to other diabetics—Type 1 or Type 2.
Dr. RK accomplished his heart disease reversal through self-prevention diet—a rigorous diabetes diet or diabetes nutrition in 3 to 6 months time.
The key to control diabetes permanently is to lower hemoglobin A1c to normal.
www.mydiabetescontrol.com /news-letter.htm   (776 words)

  
 Death to Diabetes : The Six Stages of Type 2 Diabetes Control & Reversal
This is based on an easy-to-follow, systematic 6-stage process, 200 clinical studies/medical references, and the experience of an ex-diabetic engineer.
I am hopeful that I will have a full reversal and will someday be medication free.
I feel as if I have control over my sugar for the first time since being diagnosed and I owe it all to Mr.
www.newstarget.com /017188.html   (1547 words)

  
 Subthalamic Stimulation-Induced Synaptic Responses in Substantia Nigra Pars Compacta Dopaminergic Neurons In Vitro -- ...
B, C: under control conditions the DPSP increases in amplitude with hyperpolarization and decreases in amplitude with depolarization indicating that it is a synaptic response, but exhibits a reversal potential of -33.1 mV, intermediate between that expected for an EPSP and an IPSP.
Grace, A. and Bunney, B. The control of firing pattern in nigral dopamine neurons: burst firing.
Shink, E., Bevan, M. Bolam, J. and Smith, Y. The subthalamic nucleus and the external pallidum: two tightly interconnected structures that control the output of the basal ganglia in the monkey.
jn.physiology.org /cgi/content/full/82/2/925   (5636 words)

  
 Birth Control - Birth Control - Vasectomy Reversal — 5 Things You Need To Know
During the original vasectomy the vas deferens — the tube which carries sperm from the epididymis to the prostate — is cut and clamped.
A vasectomy reversal involves removing the clamps and stitching the vas deferens together again, (or in a minority of cases actually attaching the vas deferens to the epididymis — a procedure known as a vasoepididymostomy) thereby allowing the flow of sperm once more.2.
However the current level of technological advances in microsurgery means that as many as 97% of men who undergo a straightforward vasectomy reversal experience a return to normal sperm counts and 50% of cases resulted in pregnancy.
www.allbirthcontrol.info /a1/birthcontrol-15.html   (1249 words)

  
 Vasectomy.com - The Source for Vasectomy & Reversal Information
The cost of a vasectomy reversal varies between physician practices, states and the type of procedure used.
If you have experienced the frustration and disappointment of an unsuccessful reversal procedure, it's reasonable to wonder if another attempt is worthwhile.
The good news is that an unsuccessful first reversal can sometimes be successful the second time around.
www.vasectomy.com /main.asp?siteid=R&pAreaCode=207   (264 words)

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