scholarly journals Off-line and on-line guaranteed start-up delay for Media-on-Demand with stream merging

2006 ◽  
Vol 4 (1) ◽  
pp. 72-105 ◽  
Author(s):  
Amotz Bar-Noy ◽  
Justin Goshi ◽  
Richard E. Ladner
Keyword(s):  
On Demand ◽  
Stream Merging ◽  
Start Up ◽  
On Line

Competitive on-line stream merging algorithms for media-on-demand

2003 ◽  
Vol 48 (1) ◽  
pp. 59-90 ◽  
Author(s):  
Amotz Bar-Noy ◽  
Richard E Ladner
Keyword(s):  
On Demand ◽  
Stream Merging ◽  
On Line ◽  
Merging Algorithms

On-Line Calculation of Pulmonary Mechanics by Digital Computer

1978 ◽  
Vol 17 (04) ◽  
pp. 261-272 ◽  
Author(s):  
Y. Brault ◽  
G. Atlan ◽  
H. Lorino ◽  
A. Harf ◽  
A.-M. Lorino ◽  
...  
Keyword(s):  
Time Pressure ◽  
Lung Compliance ◽  
Pulmonary Mechanics ◽  
Close Correspondence ◽  
Standard Equipment ◽  
On Demand ◽  
On Line ◽  
The Subject ◽  
Ventilatory Mechanics ◽  
Computerized System

A system was built up around a minicomputer to process in real time pressure and flow signals collected during the course of three ventilatory mechanics tests: the calculation of the lung volume, the evaluation of the static lung compliance, the analysis of the forced expiratory performance. The subject is seated in an open body Plethysmograph, which allows for the instantaneous calculation of changes in the volume of his thorax and abdomen. The system is controlled through a graphics console which displays the sampled curves and the results of data processing. In addition, the signals can be stored on demand onto a magnetic tape so that the method can be tested and improved off line. The results obtained in healthy volunteers are highly reproducible. A close correspondence is found both in patients and volunteers between computer-derived and hand-calculated results. The computerized system has become a standard equipment of our Lung Function Department, where it allows for a rapid quantitative analysis of lung volumes, lung elasticity and bronchial airflow.

The use of particle monitoring in the performance optimisation of conventional clarification and filtration processes

1997 ◽  
Vol 36 (4) ◽  
pp. 191-198
Author(s):  
G. Standen ◽  
P. J. Insole ◽  
K. J. Shek ◽  
R. A. Irwin
Keyword(s):  
Activated Carbon ◽  
Water Supply ◽  
Laser Diffraction ◽  
Raw Water ◽  
Particle Distributions ◽  
Upper Limit ◽  
Start Up ◽  
On Line ◽  
Particulates Removal ◽  
Particle Monitoring

The application of laser diffraction particle monitoring to the performance optimisation of a pilot clarifier and full-scale rapid gravity filters (RGF), operating on water supply works in Hampshire, is described. Furthermore the dosing of powdered activated carbon (PAC) into the works' clarifiers has been evaluated in terms of RGF performance. A costly proposal to install a third filter medium was subsequently abandoned when it was found that particle numbers in the filtered water were consistently below 1×102/ml. Various combinations and doses of coagulants and flocculant aids, shown to give optimum particulates removal during intensive jar testing trials, were transferred to the pilot clarifier. Particle monitoring enabled a more accurate derivation of suitable blanket chemistry and optimum blanket heights than turbidity changes. Raw water turbidities were 10-15 NTU at start-up with corresponding counts beyond the upper limit of the particle monitor. An on-line dilution system was developed to overcome this problem. Latex bead (4.33 μm) and Lycopodium spore (4-5 μm) suspensions (about 1 × 109 particles) were injected into the pilot clarifier to assess the removal efficiency of Cryptosporidium-sized particles. Reductions of about 1.7 log and 2.6 log were achieved for the beads and spores, respectively. Particle distributions of various PAC's and a bentonite were obtained in order to assess their potential effects on the coagulation process during clarification. Bentonite was also beneficial as an on-line means of checking particle monitor response and calibration. The works' filters achieved 1.5 to 2.0 log removals of 2-5 μm particles without media addition or operational changes. Combined clarification and filtration gave better particulates removal than two-stage microfiltration.

Flow Control by Pulso Width Modulation

1972 ◽  
Vol 5 (4) ◽  
pp. 142-146
Author(s):  
M S Beck ◽  
N E Gough ◽  
J N Smithies
Keyword(s):  
Cross Correlation ◽  
Pulse Width Modulation ◽  
Correlation Method ◽  
Temperature Fluctuations ◽  
Flow Rates ◽  
Start Up ◽  
On Line ◽  
Measured Flow ◽  
Novel Method ◽  
Modulation Control

A novel method of controlling the flow rates of fluids has been devised which is particularly suitable for highly erosive fluids and slurries. The width of pulses in a pulse train actuating an on-off valve is modulated according to the error between the desired and measured flow rates and thus the ratio of the total times the valve spends in its ‘on’ and ‘off’ states is varied. The method has been tested with an on-line computer which was used to measure the flow rate of water by a cross-correlation method to determine the transit time of temperature fluctuations between two thermocouples in the pipe, and to implement the pulse width modulation control. Satisfactory results have been obtained for start-up, set-point changes and load disturbances for flow rates in the turbulent region (Re > 3 600). Future development includes the use of a fluidic diverter as the on-off device.

Analysis of Direct-On-Line Synchronous Reluctance Machine Start-Up Using a Magnetic Field Decomposition

2017 ◽  
Vol 53 (3) ◽  
pp. 1852-1859 ◽  
Author(s):  
Juha Tampio ◽  
Tero Kansakangas ◽  
Saku Suuriniemi ◽  
Jere Kolehmainen ◽  
Lauri Kettunen ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Synchronous Reluctance Machine ◽  
Reluctance Machine ◽  
Start Up ◽  
On Line

Improving Health using Therapies 2.0 with Ubiquitous Wireless Access

2013 ◽  
pp. 953-970 ◽  
Author(s):  
Elsa M. Macías ◽  
Alvaro Suarez ◽  
Fernando Calvo
Keyword(s):  
Smoking Cessation ◽  
Web 2.0 ◽  
Communication Technologies ◽  
Video On Demand ◽  
Healthcare Services ◽  
Developed Countries ◽  
Wireless Access ◽  
On Demand ◽  
On Line ◽  
User Centric

Improved 4G communication technologies in conjunction to Web 2.0 technologies are contributing to design and implement new and exciting healthcare services for citizens that can be accessed any time and any place. Tobacco is a risk factor causing increased morbidity and mortality in developed countries. Smoking cessation is a hard challenge for several people that can be achieve with the help of Web 2.0 and wireless access technologies to multimedia information. There are a lot of basic Web 1.0 portals for smoking cessation. The authors present an overview of serious damages or even death provoked by nicotine poisoning, an overview of on-line group therapies, and their user-centric Web 2.0 Portal intended for smoking cessation. They demonstrate innovative and effective facts of their Web 2.0 portal: Wireless access, scheduled agendas, and video on-demand services.

Sequencing Batch Reactors - An Overview

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2523-2526 ◽  
Author(s):  
K. L. Norcross
Keyword(s):  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Process Selection ◽  
Wastewater Treatment Process ◽  
Industrial Sites ◽  
Pharmaceutical Manufacturers ◽  
Start Up ◽  
On Line ◽  
Oxygen Requirements ◽  
And Control

Sequencing Batch Reactors (SBR's) offer many advantages and few disadvantages to the wastewater treatment process selection. Due to the relatively recent surge of interest in SBR's, few plants have been on-line long enough for Engineers to have developed a thorough understanding of all design aspects and considerations. The author has been involved directly in the design, equipment supply, start-up and operation of almost 60 SBR's of all sizes. About two thirds of the installations are municipal and one-third of these installations are industrial sites involving wastes from food processors, dairies, distilleries, petro-chemical manufacturers, landfill leachate, tanneries, Government munition plants and pharmaceutical manufacturers. The control of filamentous bulking has also been excellent with SBR's. This paper will consider the mechanical, process and control aspects for design of an SBR. The mechanical aspects will include HRT and basin sizing, selection of aeration equipment and effluent decanters. The process parameters discussed will include loading rates and F:M considerations, MLSS concentration, oxygen requirements and D.O. uptake rate, flow proportional aeration, the benefits of an anoxic fill cycle, and finally, nutrient removal. Control considerations are briefly discussed.

Efficient Algorithms for Optimal Stream Merging for Media-on-Demand

2004 ◽  
Vol 33 (5) ◽  
pp. 1011-1034 ◽  
Author(s):  
Amotz Bar-Noy ◽  
Richard E. Ladner
Keyword(s):  
Efficient Algorithms ◽  
On Demand ◽  
Stream Merging
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