Providence, RI, United States
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Zhang X.,RIC Inc | Zhou P.,RIC Inc
IEEE Transactions on Biomedical Engineering | Year: 2012

Myoelectric pattern-recognition techniques have been developed to infer users intention of performing different functional movements. Thus electromyogram (EMG) can be used as control signals of assisted devices for people with disabilities. Pattern-recognition-based myoelectric control systems have rarely been designed for stroke survivors. Aiming at developing such a system for improved stroke rehabilitation, this study assessed detection of the affected limbs movement intention using high-density surface EMG recording and pattern-recognition techniques. Surface EMG signals comprised of 89 channels were recorded from 12 hemiparetic stroke subjects while they tried to perform 20 different arm, hand, and finger/thumb movements involving the affected limb. A series of pattern-recognition algorithms were implemented to identify the intended tasks of each stroke subject. High classification accuracies (96.1 4.3) were achieved, indicating that substantial motor control information can be extracted from paretic muscles of stroke survivors. Such information may potentially facilitate improved stroke rehabilitation. © 1964-2012 IEEE.


Suresh N.,RIC Inc
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference | Year: 2011

The objective of this pilot study was to examine alterations in motor unit (MU) control properties, (i.e. MU recruitment and firing rate) after stroke utilizing a recently developed high-yield surface electromyogram (EMG) decomposition technique. Two stroke subjects participated in this study. A sensor array was used to record surface EMG signals from the first dorsal interosseous (FDI) muscle during voluntary isometric contraction at varying force levels. The recording was performed in both paretic and contralateral muscles using a matched force protocol. Single motor unit activity was extracted using the surface EMG decomposition software from Delsys Inc. The results from the two stroke subjects indicate a reduction in the mean motor unit firing rate and a compression of motor unit recruitment range in paretic muscle as compared with the contralateral muscles. These findings provide further evidence of spinal motoneuron involvement after a hemispheric brain lesion, and help us to understand the complex origins of stroke induced muscle weakness.


Kaiser E.W.,University of Michigan | Wallington T.J.,RIC Inc
International Journal of Chemical Kinetics | Year: 2010

The rate constant of the reaction Cl + CH 3OH (k 1) has been measured in 500-950 Torr of N 2 over the temperature range 291-475 K. The rate constant determination was carried out using the relative rate technique with C 2H 6 as the reference compound. Experiments were performed by irradiating mixtures of CH 3OH, C 2H 6, Cl 2, and N 2 with UV light from a fluorescent lamp whose intensity peaked near 360 nm. The resultant temperature-dependent rate expression is k 1 =8.6 (±1.3) × 10 -11 exp[-167 (±60)/T] cm 3 molecule -1 s -1. Error limits represent data scatter (2σ) in the current experiments and do not include error in the reference rate constant. © 2009 Wiley Periodicals, Inc.


Patent
RIC Inc | Date: 2012-06-29

A seal for a respiratory mask that includes a first end portion adapted to be coupled to a mask shell, a second end portion for sealing engagement with a face of a patient, and a sidewall extending between the first end portion and the second end portion. At least a portion of the second end portion includes a textured area having a predetermined pattern. The area of increased surface roughness provides the patient contacting portion of the seal with a silky feeling to maximize patient comfort and the effectiveness of the seal without impairing the sealing ability.


Patent
RIC Inc | Date: 2013-08-19

A method of constructing a shaft in the earth for use as, for example, a launch shaft or a retrieval shaft, may include several steps. One step includes installing a secant pile wall into the earth. The secant pile wall encloses a portion of the earth. Another step includes excavating the portion of the earth enclosed by the secant pile wall. The excavated portion leaves an interior of the shaft and exposes an inside surface of the secant pile wall. Yet another step includes placing a metal liner within the interior of the shaft. And yet another step includes partially or more filling a space located between the inside surface of the secant pile wall and the metal liner with a grout material.


An auto-titration pressure support system (30) comprises a pressure generating system (32) for generating a flow of breathing gas at a selectable pressure level; a patient circuit (36) having a first end for coupling to the pressure generating system and a second end for coupling to an airway of a patient; a monitoring system (44) associated with the patient circuit or the pressure generating system and adapted to measure a parameter indicative of a flow of gas in such a patients airway and to output a flow signal indicative thereof; and a controller (50) coupled to the monitoring system and the pressure generating system, for controlling the pressure generating system based on the output of the monitoring system, wherein the controller determines a skewness of a patients inspiratory waveforms from the output of the flow sensor and controls the pressure generating system according to the skewness determination.


An auto-titration pressure support system (30) comprising a pressure generating system (32) adapted to generate a flow of breathing gas at a selectable pressure level; a patient circuit (36) having a first end adapted to be coupled to the pressure generating system and a second end adapted to be coupled to an airway of a patient; a monitoring system (44) associated with the patient circuit or the pressure generating system and adapted to measure a parameter indicative of a flow of gas in such a patients airway and to output a flow signal indicative thereof; and a controller (50) coupled to the monitoring system and the pressure generating system, for controlling the pressure generating system based on the output of the monitoring system, wherein the controller determines a breathing parameter from the flow signal, and wherein the controller analyzes a variability of the breathing parameter and controls the pressure generating system based on a result of the variability analysis.


A pressure support system (30) and method of treating disordered breathing that optimizes the pressure delivered to the patient to treat the disordered breathing while minimizing the delivered pressure for patient comfort. The controller (50) in the pressure support system operates as a set of prioritized control layers, wherein each control layer competes for control of the pressure generating system (32) to implement a unique pressure control process. The pressure support system also controls the pressure provided to the patient based on the variability of the monitored data and a trend analysis of this data, including an indication the skewness of the patients inspiratory waveform.


The TSA runs a fairly entertaining Instagram account, if you're the sort of person who is impressed by pictures of weapons seized from stupid passengers. That would be the extent of its social media prowess. Its blog is pretty much a 50/50 mix of Yet Another Thing You Can't Take Onboard and Blogger Bob defending the TSA's latest gaffe. One of the TSA's official Twitter flacks tried to loft a lighthearted "hey, look at this thing we came across!" tweet. She couldn't have picked a worse "thing" to highlight, considering the ongoing outrage over civil asset forfeiture. For those who can't see the embed, the tweet says:Pictured was someone's carry-on bag, opened to expose the cash contained in it.First: should the TSA be broadcasting the contents of someone's luggage -- especially considering the contents are a large amount of cash -- along with broadcasting the airport where it was discovered and the baggage's appearance? There may not be any recognizable privacy violations here, but it's certainly bad form. And it does no favors to the person carrying it.Second: unless the traveler was attempting to take the money out of the country without reporting it to Customs, it's none of the TSA's business how a traveler carries money from place to place. It may be careless, but it is not illegal and it is certainly not something government agencies should spend too much time obsessing over. (But of course they will, because travelers' cash can quickly become the government's cash, thanks to civil asset forfeiture .)Third: the TSA's public interest in this member of the public's cash is flat-out unseemly. Not only does the tweet portray the unnamed person as some sort of idiot/criminal (or both!), but it led many to the obvious assumption that this cash was seized.But, you know, LOL #otherpeoplesmoney and all that.The foregone conclusion that this money had been seized was (momentarily) dispelled by another tweet from the TSAmedia_Lisa account So, somehow a passenger managed to walk through airport security with a large amount of cash and managed to still be in possession of it on the DEPARTURE side of the checkpoint?No. This is AMERICA, land of the somewhat free and home of the brave drug warrior. A followup email to the Washington Post's Chris Ingraham proved TSAmedia_Lisa's (Farbstein) response wastrue anddisingenuous.It seems the police didn't just "investigate." They worked with another federal agency toSo Farbstein's claim about how it was "just a curiosity" is completely bogus. Not only was the photograph and putting it on social media a questionable invasion of privacy, but then they handed it off to another federal agency to take the money... and then the TSAon social media once the story blew up.It's not entirely clear which "federal agency" took the money, but a good guess is that the DEA is likely in possession of this "curiosity" now, thanks to its willingness to troll mass transportation departure points in search of "guilty" money Also ridiculous is the airport spokesperson noting that the traveler was allowed to "continue on his way," $75,000 lighter. As if that makes everything OK? If this money is completely unrelated to criminal activity, the government has just stolen money from one of its citizens. If itlinked to criminal activity, the traveler is probably in for a world of hurt if it belonged (or was owed) to someone else. Either way, the citizen loses, the government wins and the TSA badly mishandles another social media interaction.So, the TSA's attempt at cheery lightheartedness did nothing more than once again expose its dark, humorless center. The tweet may as well have read "If you had $75,000, you don't have it any more! Just saying! #freemoney" One of the nation's most tone deaf agencies continues to prove it simply won't be outdone in this category. And the trickle of details confirmed what everyone was thinking the moment this picture hit the internet: that the person carrying that money was last in possession of it shortly before the photo was taken. The government gets itsmoney and the TSA delivers the news as a punchline at the expense [pretty much literally] of some random traveler whose misfortune is the government's gain.

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