WorldWideScience

Sample records for adjustable single-sided portable

  1. A portable single-sided magnet system for remote NMR measurements of pulmonary function.

    Science.gov (United States)

    Dabaghyan, Mikayel; Muradyan, Iga; Hrovat, Alan; Butler, James; Frederick, Eric; Zhou, Feng; Kyriazis, Angelos; Hardin, Charles; Patz, Samuel; Hrovat, Mirko

    2014-12-01

    In this work, we report initial results from a light-weight, low field magnetic resonance device designed to make relative pulmonary density measurements at the bedside. The development of this device necessarily involves special considerations for the magnet, RF and data acquisition schemes as well as a careful analysis of what is needed to provide useful information in the ICU. A homogeneous field region is created remotely from the surface of the magnet such that when the magnet is placed against the chest, an NMR signal is measured from a small volume in the lung. In order to achieve portability, one must trade off field strength and therefore spatial resolution. We report initial measurements from a ping-pong ball size region in the lung as a function of lung volume. As expected, we measured decreased signal at larger lung volumes since lung density decreases with increasing lung volume. Using a CPMG sequence with ΔTE=3.5 ms and a 20 echo train, a signal to noise ratio ~1100 was obtained from an 8.8mT planar magnet after signal averaging for 43 s. This is the first demonstration of NMR measurements made on a human lung with a light-weight planar NMR device. We argue that very low spatial resolution measurements of different lobar lung regions will provide useful diagnostic information for clinicians treating Acute Respiratory Distress Syndrome as clinicians want to avoid ventilator pressures that cause either lung over distension (too much pressure) or lung collapse (too little pressure). Copyright © 2014 John Wiley & Sons, Ltd.

  2. Single-sided NMR

    CERN Document Server

    Casanova, Federico; Blümich, Bernhard

    2011-01-01

    Single-Sided NMR describes the design of the first functioning single-sided tomograph, the related measurement methods, and a number of applications. One of the key advantages to this method is the speed at which the images are obtained.

  3. Single Sided Messaging v. 0.6.6

    Energy Technology Data Exchange (ETDEWEB)

    2015-11-20

    Single-Sided Messaging (SSM) is a portable, multitransport networking library that enables applications to leverage potential one-sided capabilities of underlying network transports. It also provides desirable semantics that services for highperformance, massively parallel computers can leverage, such as an explicit cancel operation for pending transmissions, as well as enhanced matching semantics favoring large numbers of buffers attached to a single match entry. This release supports TCP/IP, shared memory, and Infiniband.

  4. Single side Emitting Transparent OLED lamp

    NARCIS (Netherlands)

    Lifka, H.; Verschuren, C.A.; Bruls, D.M.; Tanase, C.

    2011-01-01

    Transparent OLEDs offer great potential for novel applications. Preferably, the light should be emitted from one side only. This can bedone to some extent by modifying electrode thicknesses, but at the cost of reduced transparency. Here, we demonstrate a new approach tomake single side emissive

  5. Single-Sided Natural Ventilation through a Velux Roof Window

    DEFF Research Database (Denmark)

    Li, Zhigang; Nielsen, Peter Vilhelm; Fransson, J.

    2004-01-01

    This paper investigates the single-sided natural ventilation through a VELUX centre pivot roof window under natural weather conditions. The aim of the investigation is to develop an empirical formulation for air flow rate through a roof window based on CFD and tracer gas decay measurement methods...

  6. Unified double- and single-sided homogeneous Green's function representations.

    Science.gov (United States)

    Wapenaar, Kees; van der Neut, Joost; Slob, Evert

    2016-06-01

    In wave theory, the homogeneous Green's function consists of the impulse response to a point source, minus its time-reversal. It can be represented by a closed boundary integral. In many practical situations, the closed boundary integral needs to be approximated by an open boundary integral because the medium of interest is often accessible from one side only. The inherent approximations are acceptable as long as the effects of multiple scattering are negligible. However, in case of strongly inhomogeneous media, the effects of multiple scattering can be severe. We derive double- and single-sided homogeneous Green's function representations. The single-sided representation applies to situations where the medium can be accessed from one side only. It correctly handles multiple scattering. It employs a focusing function instead of the backward propagating Green's function in the classical (double-sided) representation. When reflection measurements are available at the accessible boundary of the medium, the focusing function can be retrieved from these measurements. Throughout the paper, we use a unified notation which applies to acoustic, quantum-mechanical, electromagnetic and elastodynamic waves. We foresee many interesting applications of the unified single-sided homogeneous Green's function representation in holographic imaging and inverse scattering, time-reversed wave field propagation and interferometric Green's function retrieval.

  7. Cochlear implantation for single-sided deafness and tinnitus suppression.

    Science.gov (United States)

    Holder, Jourdan T; O'Connell, Brendan; Hedley-Williams, Andrea; Wanna, George

    To quantify the potential effectiveness of cochlear implantation for tinnitus suppression in patients with single-sided deafness using the Tinnitus Handicap Inventory. The study included 12 patients with unilateral tinnitus who were undergoing cochlear implantation for single-sided deafness. The Tinnitus Handicap Inventory was administered at the patient's cochlear implant candidacy evaluation appointment prior to implantation and every cochlear implant follow-up appointment, except activation, following implantation. Patient demographics and speech recognition scores were also retrospectively recorded using the electronic medical record. A significant reduction was found when comparing Tinnitus Handicap Inventory score preoperatively (61.2±27.5) to the Tinnitus Handicap Inventory score after three months of cochlear implant use (24.6±28.2, p=0.004) and the Tinnitus Handicap Inventory score beyond 6months of CI use (13.3±18.9, p=0.008). Further, 45% of patients reported total tinnitus suppression. Mean CNC word recognition score improved from 2.9% (SD 9.4) pre-operatively to 40.8% (SD 31.7) by 6months post-activation, which was significantly improved from pre-operative scores (p=0.008). The present data is in agreement with previously published studies that have shown an improvement in tinnitus following cochlear implantation for the large majority of patients with single-sided deafness. Copyright © 2017 Elsevier Inc. All rights reserved.

  8. Enhanced Single-Sided Ventilation with Overhang in Buildings

    Directory of Open Access Journals (Sweden)

    Jinsoo Park

    2016-02-01

    Full Text Available Enhancing the ventilation performance of energy-efficient buildings with single-sided openings is important because their ventilation performance is poor and strongly depends on the wind conditions. We considered an overhang as a potential building façade for improving the single-sided ventilation performance. We performed numerical simulations of three-dimensional unsteady turbulent flows over an idealized building with an overhang in order to investigate the effect of the overhang on the ventilation performance. Parametric studies were systematically carried out where the overhang length, wind speed, and wind direction were varied. The numerical results showed that the overhang drastically enhanced the ventilation rate in the windward direction regardless of the wind speed. This is because, for windward cases, the overhang produces a vortex with strong flow separation near the tip of the overhang, which promotes a net airflow exchange at the entrance and increases the ventilation rate. However, the ventilation rates for the leeward and side cases are slightly decreased with the overhang. Using an overhang with single-sided ventilation greatly reduces the local mean age of air (LMA in the windward direction but increases it in the leeward direction.

  9. Single-sided continuous optoelectrowetting (SCOEW) for droplet manipulation with light patterns.

    Science.gov (United States)

    Park, Sung-Yong; Teitell, Michael A; Chiou, Eric P Y

    2010-07-07

    Electrowetting-on-dielectric (EWOD) promises to be an important lab-on-a-chip approach for effectively manipulating droplets with electric field-controlled surface tension. Droplets manipulated in electrowetting-based devices are typically sandwiched between two parallel plates and actuated by digital electrodes. The size of pixilated electrodes limits the minimum droplet size that can be manipulated. Here, we report on a single-sided continuous optoelectrowetting (SCOEW) mechanism that enables light-patterned electrowetting modulation for continuous droplet manipulation on an open, featureless, and photoconductive surface. SCOEW overcomes the size limitation of physical pixilated electrodes by utilizing dynamic and reconfigurable optical patterns and enables the continuous transport, splitting, merging, and mixing of droplets with volumes ranging from 50 microL to 250 pL, over 5-orders of magnitude. This single-sided open configuration provides a flexible interface for integration with other microfluidic components, such as sample reservoirs through simple tubing. Light-triggered, parallel, and volume-tunable droplet injection with volume variation less than 1% has been demonstrated with SCOEW. The unique lateral field-driven optoelectrowetting mechanism also enables extremely low light intensity actuation, and droplet manipulation can be achieved by directly positioning the SCOEW chip on a LCD screen used in a laptop or portable cellular phone.

  10. Stacked planar micro coils for single-sided NMR applications

    Science.gov (United States)

    Watzlaw, Jan; Glöggler, Stefan; Blümich, Bernhard; Mokwa, Wilfried; Schnakenberg, Uwe

    2013-05-01

    This paper describes planar micro structured coils fabricated in a novel multilayer assembly for single-sided NMR experiments. By arranging the coil's turns in both lateral and vertical directions, all relevant coil parameters can be tailored to a specific application. To this end, we implemented an optimization algorithm based on simulations applying finite element methods (FEMs), which maximizes the coil's sensitivity and thus signal-to-noise ratio (SNR) while incorporating boundary conditions such as the coil's electrical properties and a localized sensitivity needed for single-sided applications. Utilizing thin-film technology and microstructuring techniques, the planar character is kept by a sub-millimeter overall thickness. The coils are adapted to the Profile NMR-MOUSE® magnet with a homogeneous slice of about 200 μm in height and a uniform depth gradient of about 20 T/m. The final design of a coil with 20 turns, separated in four layers with five turns each, and an outer dimension of 4 × 4 mm2 is able to measure a sample volume almost five times smaller than that of a state-of-the-art 14 × 16 mm2 Profile NMR-MOUSE® coil with the same SNR. This allows for volume-limited measurements with high SNR and enables different future developments. The minimal dead time of 4 μs facilitates further improvements of the SNR by echo adding techniques and the characterization of samples with short T2 relaxation times. Measurements on solid polymers like polyethylene (PE) and polypropylene (PP) with T2 components as short as 200 μs approve the overall beneficial coil properties. Furthermore the ability to perform depth profiling with microscopic resolution is demonstrated.

  11. Single sided tomography of extremely large dense objects

    Energy Technology Data Exchange (ETDEWEB)

    Thoe, R.S.

    1993-03-24

    One can envision many circumstances where radiography could be valuable but is frustrated by the geometry of the object to be radiographed. For example, extremely large objects, the separation of rocket propellants from the skin of solid fuel rocket motor, the structural integrity of an underground tank or hull of a ship, the location of buried objects, inspection of large castings etc. The author has been investigating ways to do this type of radiography and as a result has developed a technique which can be used to obtain three dimensional radiographs using Compton scattered radiation from a monochromatic source and a high efficiency, high resolution germanium spectrometer. This paper gives specific details of the reconstruction technique and presents the results of numerous numerical simulations and compares these simulations to spectra obtained in the laboratory. In addition the author presents the results of calculations made for the development of an alternative single sided radiography technique which will permit inspection of the interior of large objects. As a benchmark the author seeks to obtain three dimensional images with a resolution of about one cubic centimeter in a concrete cube 30 centimeters on a side. Such a device must use photons of very high energy. For example 30 cm of concrete represents about 15 mean free paths for photons of 100 keV, whereas at 1 MeV the attenuation is down to about five mean free paths. At these higher energies Compton scattering becomes much more probable. Although this would appear to be advantageous for single sided imaging techniques, such techniques are hampered by two side effects. In this paper the results are given of numerous Monte Carlo calculations detailing the extent of the multiple scattering and the feasibility of a variety of imaging schemes is explored.

  12. The Impact of Single-Sided Deafness upon Music Appreciation.

    Science.gov (United States)

    Meehan, Sarah; Hough, Elizabeth A; Crundwell, Gemma; Knappett, Rachel; Smith, Mark; Baguley, David M

    2017-05-01

    Many of the world's population have hearing loss in one ear; current statistics indicate that up to 10% of the population may be affected. Although the detrimental impact of bilateral hearing loss, hearing aids, and cochlear implants upon music appreciation is well recognized, studies on the influence of single-sided deafness (SSD) are sparse. We sought to investigate whether a single-sided hearing loss can cause problems with music appreciation, despite normal hearing in the other ear. A tailored questionnaire was used to investigate music appreciation for those with SSD. We performed a retrospective survey of a population of 51 adults from a University Hospital Audiology Department SSD clinic. SSD was predominantly adult-onset sensorineural hearing loss, caused by a variety of etiologies. Analyses were performed to assess for statistical differences between groups, for example, comparing music appreciation before and after the onset of SSD, or before and after receiving hearing aid(s). Results demonstrated that a proportion of the population experienced significant changes to the way music sounded; music was found to sound more unnatural (75%), unpleasant (71%), and indistinct (81%) than before hearing loss. Music was reported to lack the perceptual qualities of stereo sound, and to be confounded by distortion effects and tinnitus. Such changes manifested in an altered music appreciation, with 44% of participants listening to music less often, 71% of participants enjoying music less, and 46% of participants reporting that music played a lesser role in their lives than pre-SSD. Negative effects surrounding social occasions with music were revealed, along with a strong preference for limiting background music. Hearing aids were not found to significantly ameliorate these effects. Results could be explained in part through considerations of psychoacoustic changes intrinsic to an asymmetric hearing loss and impaired auditory scene analysis. Given the prevalence of

  13. Single-sided natural ventilation through a centre-pivot roof window

    DEFF Research Database (Denmark)

    Iqbal, Ahsan; Nielsen, Peter V.; Gunner, Amalie

    2014-01-01

    systems. In this study, numerical methods were used to characterise a centre-pivot roof window for wind-driven single-sided ventilation. A 1:20 scale model house of the Energy Flex House (Denmark) was used in this study. The roof slope was 36o. It was found that the single-sided ventilation through...

  14. A customised portable LogMAR chart with adjustable chart illumination for use as a mass screening device in the rural population

    Directory of Open Access Journals (Sweden)

    Gouthaman M

    2005-01-01

    Full Text Available Aim: To develop a customised, portable, cost-effective (logarithmic minimal angle resolution LogMAR chart with adjustable illumination for use as a mass vision-screening device in the rural population. Materials and Methods : Visual acuity of 100 individuals was evaluated with a customised chart and compared with the standard Early Treatment Diabetic Retinopathy Study (ETDRS chart and Snellen′s Chart. Bland and Altman analytical techniques were used for analysis. Results: Test-retest variability of the customised chart was just a one-line difference (95% CI for agreement, and so were the results with the standard ETDRS charts; a variability of 3-line was noted with Snellen′s chart. Two-line differences were observed when comparison was made with Standard ETDRS chart and 2 to 3-line differences with Snellen′s chart. Conclusion: The customised portable LogMAR chart with adjustable illumination shows less test-retest variability and better agreement with standard ETDRS chart; therefore, it can be used as a mass vision-screening device in rural settings.

  15. Preliminary evaluation of a novel bone-conduction device for single-sided deafness.

    Science.gov (United States)

    Popelka, Gerald R; Derebery, Jennifer; Blevins, Nikolas H; Murray, Michael; Moore, Brian C J; Sweetow, Robert W; Wu, Ben; Katsis, Mina

    2010-04-01

    A new intraoral bone-conduction device has advantages over existing bone-conduction devices for reducing the auditory deficits associated with single-sided deafness (SSD). Existing bone-conduction devices effectively mitigate auditory deficits from single-sided deafness but have suboptimal microphone locations, limited frequency range, and/or require invasive surgery. A new device has been designed to improve microphone placement (in the ear canal of the deaf ear), provide a wider frequency range, and eliminate surgery by delivering bone-conduction signals to the teeth via a removable oral appliance. Forces applied by the oral appliance were compared with forces typically experienced by the teeth from normal functions such as mastication or from other appliances. Tooth surface changes were measured on extracted teeth, and transducer temperature was measured under typical use conditions. Dynamic operating range, including gain, bandwidth, and maximum output limits, were determined from uncomfortable loudness levels and vibrotactile thresholds, and speech recognition scores were measured using normal-hearing subjects. Auditory performance in noise (Hearing in Noise Test) was measured in a limited sample of SSD subjects. Overall comfort, ease of insertion, and removal and visibility of the oral appliance in comparison with traditional hearing aids were measured using a rating scale. The oral appliance produces forces that are far below those experienced by the teeth from normal functions or conventional dental appliances. The bone-conduction signal level can be adjusted to prevent tactile perception yet provide sufficient gain and output at frequencies from 250 to 12,000 Hz. The device does not damage tooth surfaces nor produce heat, can be inserted and removed easily, and is as comfortable to wear as traditional hearing aids. The new microphone location has advantages for reducing the auditory deficits caused by SSD, including the potential to provide spatial cues

  16. Neural-network-based single-sided non-enwrapping power loss tester

    CERN Document Server

    Passadis, K; Beckley, P

    2003-01-01

    It is preferable to be able to assess the power loss of electrical steels during production. When a single-sided tester is used, flux sensing is undertaken from one side only and hence some leakage flux above the strip may not captured by the sensing coils. Therefore, the disadvantage of a single-sided non-enwrapping tester lies in the measurement of the flux density in the material. A neural network was successfully used to 'predict' the correct level of flux density for accurate assessment of power loss.

  17. Single-sided sheet-to-tube spot welding investigated by 3D numerical simulations

    DEFF Research Database (Denmark)

    Nielsen, Chris Valentin; Chergui, Azeddine; Zhang, Wenqi

    The single-sided resistance spot welding process is analyzed by a 3D numerical study of sheet-to-tube joining. Finite element simulations are carried out in SORPAS® 3D. Two levels of electrode force and five levels of welding current are simulated. The overall effects of changing current and force...

  18. Elastodynamic single-sided homogeneous Green's function representation: Theory and examples

    NARCIS (Netherlands)

    Wapenaar, C.P.A.; Reinicke Urruticoechea, C.

    2017-01-01

    The homogeneous Green’s function is the Green’s function minus its timereversal. Many wavefield imaging applications make use of the homogeneous Green’s function in form of a closed boundary integral. Wapenaar et al. (2016a) derived an accurate single-sided homogeneous Green’s function

  19. Benefit of Baha in the elderly with single-sided deafness

    NARCIS (Netherlands)

    Faber, H.T.; Wolf, M.J. de; Cremers, C.W.R.J.; Snik, A.F.M.; Hol, M.K.S.

    2013-01-01

    The objective of this study is to determine the benefits of bone-anchored hearing aid (Baha) contralateral routing of signal (CROS) in the older adult population with single-sided deafness. Five questionnaires [general usage questionnaire, Glasgow benefit inventory (GBI), Abbreviated profile of

  20. Review: Bone conduction devices and contralateral routing of sound systems in single-sided deafness

    NARCIS (Netherlands)

    Peters, Jeroen P M; Smit, Adriana L; Stegeman, Inge; Grolman, Wilko

    OBJECTIVES/HYPOTHESIS: Systematically review the literature on the clinical outcome of bone conduction devices (BCD) and contralateral routing of sound systems (CROSS) for patients with single-sided deafness (SSD). DATA SOURCES: PubMed, Embase, Cochrane Library, and CINAHL databases were searched up

  1. Single-sided magnetic resonance profiling in biological and materials science.

    Science.gov (United States)

    Danieli, Ernesto; Blümich, Bernhard

    2013-04-01

    Single-sided NMR was inspired by the oil industry that strived to improve the performance of well-logging tools to measure the properties of fluids confined downhole. This unconventional way of implementing NMR, in which stray magnetic and radio frequency fields are used to recover information of arbitrarily large objects placed outside the magnet, motivated the development of handheld NMR sensors. These devices have moved the technique to different scientific disciplines. The current work gives a review of the most relevant magnets and methodologies developed to generate NMR information from spatially localized regions of samples placed in close proximity to the sensors. When carried out systematically, such measurements lead to 'single-sided depth profiles' or one-dimensional images. This paper presents recent and most relevant applications as well as future perspectives of this growing branch of MRI. Copyright © 2012 Elsevier Inc. All rights reserved.

  2. Single-sided Natural Ventilation Driven by a Combination of Wind Pressure and Temperature Difference

    DEFF Research Database (Denmark)

    Larsen, Tine Steen; Heiselberg, Per

    2007-01-01

    . In both situations the aim is to obtain a good indoor environment but to control the amount of air, some basic knowledge of the flow through an opening is necessary. The amount of air going through the window opening in single-sided ventilation will depend on the wind speed near the building......, which make the prediction difficult. From earlier work, a few design expressions for single-sided ventilation already exist, but none of these include the wind direction, which here is an important parameter. Therefore several wind tunnel experiments are made in this work to find a new design expression......Natural ventilation is a commonly used principle when ventilation systems for buildings are designed. The ventilation can either be obtained by automatically controlled openings in the building envelope, or it can just be the simple action of opening a door or a window to let the fresh air in...

  3. Evaluation of single-sided natural ventilation using a simplified and fair calculation method

    DEFF Research Database (Denmark)

    Plesner, Christoffer; Larsen, Tine Steen; Leprince, Valérie

    2016-01-01

    The overall objective of this paper is to evaluate design expressions for single-sided ventilation and find the most suitable that would in average perform well, while reducing the risk of overestimating air flows in individual cases. The design expression needs to be both simple and fair to fit...... improve the support of ventilative cooling in future standards and regulations, by making it simple to predict the air flows in buildings....

  4. Efficacy of the bone-anchored hearing aid for single-sided deafness.

    Science.gov (United States)

    Linstrom, Christopher J; Silverman, Carol A; Yu, Guo-Pei

    2009-04-01

    The aim was to examine short- and long-term efficacy of the bone-anchored hearing aid (BAHA) on adults with single-sided deafness. Prospective investigation. The outcome measures included the Hearing in Noise Test (HINT), Abbreviated Profile of Hearing Aid Benefit (APHAB), and Single-Sided Deafness Questionnaire (SSD). The BAHA group comprised seven adults with single-sided deafness and the control group comprised 20 adults with essentially normal-hearing sensitivity, bilaterally. The outcome measures were administered in the unaided, directional BAHA, and omnidirectional BAHA conditions after 1 month, 6 months, and 12 months of BAHA use. A repeated measures analysis of variance (ANOVA) model was used to evaluate the data (for the SSD, a nonparametric analog of ANOVA was employed). None of the factors (time, HINT condition, amplification status) or their interactions were significant predictors of change in signal-to-noise ratio (SNR) from baseline over time on the HINT. The mean SNR (non-baseline-subtracted) was significantly lower in the directional BAHA versus the unaided status and in the omnidirectional BAHA versus the unaided status, but only under the noise in front, speech lateralized to the bad ear HINT condition. Significant short- and long-term BAHA benefit was observed on the APHAB (all subscales except Aversiveness) and SSD (all questionnaire items). Our results show short- and long-term efficacy for the BAHA in adults with single-sided deafness for recognition of speech in noise (noise in front, speech lateralized to the bad ear) and on subjective measures of benefit.

  5. A single-sided representation for the homogeneous Green's function of a unified scalar wave equation.

    Science.gov (United States)

    Wapenaar, Kees

    2017-06-01

    A unified scalar wave equation is formulated, which covers three-dimensional (3D) acoustic waves, 2D horizontally-polarised shear waves, 2D transverse-electric EM waves, 2D transverse-magnetic EM waves, 3D quantum-mechanical waves and 2D flexural waves. The homogeneous Green's function of this wave equation is a combination of the causal Green's function and its time-reversal, such that their singularities at the source position cancel each other. A classical representation expresses this homogeneous Green's function as a closed boundary integral. This representation finds applications in holographic imaging, time-reversed wave propagation and Green's function retrieval by cross correlation. The main drawback of the classical representation in those applications is that it requires access to a closed boundary around the medium of interest, whereas in many practical situations the medium can be accessed from one side only. Therefore, a single-sided representation is derived for the homogeneous Green's function of the unified scalar wave equation. Like the classical representation, this single-sided representation fully accounts for multiple scattering. The single-sided representation has the same applications as the classical representation, but unlike the classical representation it is applicable in situations where the medium of interest is accessible from one side only.

  6. Unified double- and single-sided homogeneous Green’s function representations

    Science.gov (United States)

    van der Neut, Joost; Slob, Evert

    2016-01-01

    In wave theory, the homogeneous Green’s function consists of the impulse response to a point source, minus its time-reversal. It can be represented by a closed boundary integral. In many practical situations, the closed boundary integral needs to be approximated by an open boundary integral because the medium of interest is often accessible from one side only. The inherent approximations are acceptable as long as the effects of multiple scattering are negligible. However, in case of strongly inhomogeneous media, the effects of multiple scattering can be severe. We derive double- and single-sided homogeneous Green’s function representations. The single-sided representation applies to situations where the medium can be accessed from one side only. It correctly handles multiple scattering. It employs a focusing function instead of the backward propagating Green’s function in the classical (double-sided) representation. When reflection measurements are available at the accessible boundary of the medium, the focusing function can be retrieved from these measurements. Throughout the paper, we use a unified notation which applies to acoustic, quantum-mechanical, electromagnetic and elastodynamic waves. We foresee many interesting applications of the unified single-sided homogeneous Green’s function representation in holographic imaging and inverse scattering, time-reversed wave field propagation and interferometric Green’s function retrieval. PMID:27436983

  7. Patient benefit from Cochlear implantation in single-sided deafness: a 1-year follow-up.

    Science.gov (United States)

    Louza, Julia; Hempel, John-Martin; Krause, Eike; Berghaus, Alexander; Müller, Joachim; Braun, Thomas

    2017-06-01

    The objective of the study was to evaluate the quality of life and benefit in patients with single-side deafness before and 1 year after cochlear implantation. In a prospective observational study design, ten adult patients with single-sided deafness undergoing cochlear implantation were included. All patients had on the implantation side no speech discrimination with normal hearing aids. The contralateral side was normal or marginal hearing loss. For determining the subject benefit from cochlear implantation, each patient answered standardized questionnaires directly before implantation and 1 year after. Regarding the questionnaire Speech, Spatial and Qualities of Hearing (SSQ), the tests yielded a significant difference in the subdomains "speech intelligibility" and "spatial hearing". The Nijmegen Cochlear Implant Questionnaire (NCIQ) showed a significant difference in the subdomain "basic sound perception", but not in the total score. The Glasgow Hearing Aid Benefit Profile (GHABP) showed on average moderate satisfaction in the subdomains "hearing aid benefit" and "residual disability". In general quality of life, no significant difference was found measured by the questionnaire EQ-5D-3L. One year after cochlear implantation, most patients with single-sided deafness showed benefits in hearing as measured by validated questionnaires However, not all patients reported a significant improvement in general quality of life. Therefore, it is important to inform patients adequately and offer alternative treatments before implantation.

  8. Single-sided NMR for the measurement of the degree of cross-linking and curing

    OpenAIRE

    Halmen, Norbert; Kugler, Christoph; Kraus, Eduard; Baudrit, Benjamin; Hochrein, Thomas; Bastian, Martin

    2018-01-01

    The degree of cross-linking and curing is one of the most important values concerning the quality of cross-linked polyethylene (PE-X) and the functionality of adhesives and resin-based components. Up to now, the measurement of this property has mostly been time-consuming and usually destructive. Within the shown work the feasibility of single-sided nuclear magnetic resonance (NMR) for the non-destructive determination of the degree of cross-linking and curing as process moni...

  9. Single-sided natural ventilation driven by wind pressure and temperature difference

    DEFF Research Database (Denmark)

    Larsen, Tine Steen; Heiselberg, Per

    2008-01-01

    -scale wind tunnel experiments have been made with the aim of making a new expression for calculation of the airflow rate in single-sided natural ventilation. During the wind tunnel experiments it was found that the dominating driving force differs between wind speed and temperature difference depending......Even though opening a window for ventilation of a room seems very simple, the flow that occurs in this situation is rather complicated. The amount of air going through the window opening will depend on the wind speed near the building, the temperatures inside and outside the room, the wind...

  10. Outcomes of Bone Anchored Hearing Aids (BAHA) for Single Sided Deafness in Nontraditional Candidates.

    Science.gov (United States)

    Schwartz, Seth R; Kobylk, Deborah

    2016-12-01

    To assess both quality of life (QOL) and hearing outcomes in bone anchored hearing aid (BAHA) users for single sided deafness with 1) less than total hearing loss in the deaf ear, or 2) some degree of hearing loss in the better ear and compare them to traditional candidates. Prospective comparative cohort study. Tertiary referral center. Patients with a BAHA for single sided deafness were assigned into groups based on hearing thresholds in the deaf ear (> or or hearing including Quick SIN and HINT in quiet and noise, and a localization task. Differences in QOL, hearing performance in noise, and localization ability. Nineteen patients were tested. Patients with residual hearing in the BAHA ear showed nonsignificant trends toward improved performance in noise localization compared with those without residual hearing. There were no statistically significant differences in QOL between groups. Patients with hearing loss in the control ear had equivalent QOL scores to those with normal hearing in the control ear despite performing worse on speech in noise tasks. BAHA patients with hearing loss in the better ear seem to perform worse in noise relative to those without but have equivalent perceived benefit. Residual hearing in the implanted ear may improve performance. A larger sample size is needed to confirm these trends.

  11. Review: Bone conduction devices and contralateral routing of sound systems in single-sided deafness.

    Science.gov (United States)

    Peters, Jeroen P M; Smit, Adriana L; Stegeman, Inge; Grolman, Wilko

    2015-01-01

    Systematically review the literature on the clinical outcome of bone conduction devices (BCD) and contralateral routing of sound systems (CROSS) for patients with single-sided deafness (SSD). PubMed, Embase, Cochrane Library, and CINAHL databases were searched up to April 7, 2014. All studies investigating BCD and CROSS for patients with SSD on speech perception in noise, sound localization, or quality of life were selected and critically appraised. In total, 46 articles were retrieved, of which six satisfied the eligibility criteria. Critical appraisal showed that five studies (n = 91) carried a moderate to high directness of evidence and a low to moderate risk of bias. Subsequently, study characteristics and outcome measurements were extracted. Due to large heterogeneity between studies, pooling of data was not feasible. Studies did not show a clear advantage of BCD or CROSS on speech perception in noise. BCD and CROSS lead to the same sound localization ability as the unaided condition. Quality of life did not differ significantly between conditions; however, subjective speech communication did improve. No high level of evidence studies compare BCD and CROSS in patients with SSD. Literature showed no beneficial effect of BCD or CROSS regarding speech perception in noise and sound localization. Subjective speech communication demonstrated a moderate improvement with BCD and CROSS. High evidence studies comparing all treatment options for single-sided deafness should be conducted. © 2014 The American Laryngological, Rhinological and Otological Society, Inc.

  12. Moisture dynamics in wall paintings monitored by single-sided NMR.

    Science.gov (United States)

    Oligschläger, D; Waldow, S; Haber, A; Zia, W; Blümich, B

    2015-01-01

    The durability of historic wall paintings is highly dependent on environmental influences such as moisture ingress, salt crystallization and temperature changes. A fundamental understanding of dynamic transport processes in wall paintings is necessary to apply suitable conservation and restoration methods to preserve such objects with high cultural value. Non-invasive, mobile-NMR techniques with single-sided sensors, such as the NMR-MOUSE(®), enable to monitor the moisture content, transport and apparent diffusion constants in wall paintings. We investigated this technique by experiment and modeling to correlate salt crystallization, moisture transport and local diffusion in wall-painting samples. Moreover, the influence of different painting techniques (fresco and secco) and conservation/consolidation methods on moisture transport and diffusion is discussed. The results are compared with results from field measurements on real fresco paintings in Casa del Salone Nero and the Villa of the Papyri, Herculaneum, Italy. Copyright © 2014 John Wiley & Sons, Ltd.

  13. Single-sided NMR for the measurement of the degree of cross-linking and curing

    Directory of Open Access Journals (Sweden)

    N. Halmen

    2018-01-01

    Full Text Available The degree of cross-linking and curing is one of the most important values concerning the quality of cross-linked polyethylene (PE-X and the functionality of adhesives and resin-based components. Up to now, the measurement of this property has mostly been time-consuming and usually destructive. Within the shown work the feasibility of single-sided nuclear magnetic resonance (NMR for the non-destructive determination of the degree of cross-linking and curing as process monitoring was investigated. First results indicate the possibility of distinguishing between PE-X samples with different degrees of cross-linking. The homogeneity of the samples and the curing kinetics of adhesives can also be monitored. The measurements show good agreement with reference tests (wet chemical analysis, differential scanning calorimetry, dielectric analysis. Furthermore, the influence of sample temperature on the characteristic relaxation times can be observed.

  14. Sparse Volterra model based on optical single side-band NPAM-4 direct-detection system

    Science.gov (United States)

    Ying, Hao; Zhu, Mingyue; Zhang, Jing; Yi, Xingwen; Song, Yang; Qiu, Kun

    2018-01-01

    Signal-to-signal beating interference (SSBI) is one of the main drawbacks in direct-detection based optical transmission systems. Volterra filter is a common equalization method to mitigate the nonlinear distortion. However, the computational complexity may be unacceptable as the transmission capacity increases. In this paper, we propose a sparse Volterra model combining the feed forward equalization (FFE) and higher order terms of a modified Volterra filter with Schmidt orthogonal searching to mitigate the linear and nonlinear interference and reduce the complexity significantly in an optical single-side band (SSB) Nyquist pulse-shaped four-level pulse amplitude (NPAM-4) system. The experimental results show that the sparse Volterra filter and full Volterra filter have comparable performance, but the former only needs half kernels of the latter.

  15. Cochlear Implantation and Single-sided Deafness: A Systematic Review of the Literature

    Directory of Open Access Journals (Sweden)

    Cabral Junior, Francisco

    2015-07-01

    Full Text Available Introduction Current data show that binaural hearing is superior to unilateral hearing, specifically in the understanding of speech in noisy environments. Furthermore, unilateral hearing reduce onés ability to localize sound. Objectives This study provides a systematic review of recent studies to evaluate the outcomes of cochlear implantation in patients with single-sided deafness (SSD with regards to speech discrimination, sound localization and tinnitus suppression. Data Synthesis We performed a search in the PubMed, Cochrane Library and Lilacs databases to assess studies related to cochlear implantation in patients with unilateral deafness. After critical appraisal, eleven studies were selected for data extraction and analysis of demographic, study design and outcome data. Conclusion Although some studies have shown encouraging results on cochlear implantation and SSD, all fail to provide a high level of evidence. Larger studies are necessary to define the tangible benefits of cochlear implantation in patients with SSD.

  16. Elastodynamic Green's function retrieval through single-sided Marchenko inverse scattering.

    Science.gov (United States)

    da Costa Filho, Carlos Alberto; Ravasi, Matteo; Curtis, Andrew; Meles, Giovanni Angelo

    2014-12-01

    The solution of the inverse scattering problem for the one-dimensional Schrödinger equation is given by the Marchenko equation. Recently, a Marchenko-type equation has been derived for three-dimensional (3D) acoustic wave fields, whose solution has been shown to recover the Green's functions from points within the medium to its exterior, using only single-sided scattered data. Here we extend this approach to 3D vectorial wave fields that satisfy the elastodynamic wave equation and recover Green's functions from points interior to an elastic, solid-state medium from purely external and one-sided measurements. The method is demonstrated in a solid-earth-like model to construct Green's functions using only subsurface sources, from earth-surface force and deformation sources and particle velocity and stress measurements.

  17. Analytical and numerical study concerning the behaviour of single-sided bonded patch repairs

    Directory of Open Access Journals (Sweden)

    Gheorghi OPATCHI

    2011-06-01

    Full Text Available Adhesive bonded joints are used in the assembling of structural parts, especially of those which are made from dissimilar materials. Lightweight fibre reinforced polymer composites and other adhesive bonded components represent a major proportion of a modern aircraft. Bonded patch repair technology has been widely used to repair cracked thin-walled structures to extend their service life, because a correctly executed repair significantly enhances the structural performance.In practice, the single-sided bonded patch repair is the most used because a good solution like the double-sided repair may not be an option if the access to the structure is only available from one side.This paper presents a relatively simple and effective design procedure for the single strapped bonded joints. Also, the influence of various geometrical parameters of the joint is evaluated. The analytical development is validated based on nonlinear finite element analyses.

  18. Diffusion tensor imaging of the auditory nerve in patients with acquired single-sided deafness

    DEFF Research Database (Denmark)

    Vos, Sjoerd; Haakma, Wieke; Versnel, Huib

    2015-01-01

    following cochlear hair cell loss, and the amount of degeneration may considerably differ between the two ears, also in patients with bilateral deafness. A measure that reflects the nerve's condition would help to assess the best of both nerves and decide accordingly which ear should be implanted...... for optimal benefit from a CI. Diffusion tensor MRI (DTI) may provide such a measure, by allowing noninvasive investigations of the nerve's microstructure. In this pilot study, we show the first use of DTI to image the auditory nerve in five normal-hearing subjects and five patients with long-term profound...... single-sided sensorineural hearing loss. A specialized acquisition protocol was designed for a 3 T MRI scanner to image the small nerve bundle. The nerve was reconstructed using fiber tractography and DTI metrics - which reflect the nerve's microstructural properties - were computed per tract. Comparing...

  19. Low-gradient single-sided NMR sensor for one-shot profiling of human skin.

    Science.gov (United States)

    Van Landeghem, Maxime; Danieli, Ernesto; Perlo, Juan; Blümich, Bernhard; Casanova, Federico

    2012-02-01

    This paper describes a shimming approach useful to reduce the gradient strength of the magnetic field generated by single-sided sensors simultaneously maximizing its uniformity along the lateral directions of the magnet. In this way, the thickness of the excited sensitive volume can be increased without compromising the depth resolution of the sensor. By implementing this method on a standard U-shaped magnet, the gradient strength was reduced one order of magnitude. In the presence of a gradient of about 2 T/m, slices of 2mm could be profiled with a resolution that ranges from 25 μm at the center of the slice to 50 μm at the borders. This sensor is of particular advantage for applications, where the scanning range is of the order of the excited slice. In those cases, the full profile is measured in a single excitation experiment, eliminating the need for repositioning the excited slice across the depth range to complete the profile as occurs with standard high gradient sensors. Besides simplifying the experimental setup, the possibility to move from a point-by-point measurement to the simultaneous acquisition of the full profile led to the shortening of the experimental time. A further advantage of performing the experiment under a smaller static gradient is a reduction of the diffusion attenuation affecting the signal decay measured with a CPMG sequence, making it possible to measure the T(2) of samples with high diffusivity (comparable to the water diffusivity). The performance of the sensor in terms of resolution and sensitivity is first evaluated and compared with conventional singled-sided sensors of higher gradient strength using phantoms of known geometry and relaxation times. Then, the device is used to profile the structure of human skin in vivo. To understand the contrast between the different skin layers, the distribution of relaxation times T(2) and diffusion coefficients is spatially resolved along the depth direction. Copyright © 2011 Elsevier Inc

  20. Numerical Simulation of Inter-Flat Air Cross-Contamination under the Condition of Single-Sided Natural Ventilation

    DEFF Research Database (Denmark)

    Liu, Xiaoping; Niu, Jianlei; Perino, Marco

    2008-01-01

    The objective of this study is to investigate the mechanism of inter-flat airborne disease transmission under the condition of single-sided natural ventilation. The focus is on one of the typical designs in residential buildings with a rectangular plan layout and having a common corridor separating...... the two sides, each of which has a flat fa ade with openable windows. When the wind speed is extremely low, with doors closed and windows opened, the flats become single-sided naturally ventilated driven by buoyancy effects. The air pollutants can travel from a lower flat to a vertically adjacent upper...... flat through open windows, caused by indoor/outdoor temperature-difference induced buoyancy. Computational fluid dynamics is employed to explore the characteristics of this process. Based on the comparison with experimental data about the air flow distribution in and around a single-sided naturally...

  1. Constructions of secure entanglement channels assisted by quantum dots inside single-sided optical cavities

    Science.gov (United States)

    Heo, Jino; Kang, Min-Sung; Hong, Chang-Ho; Choi, Seong-Gon; Hong, Jong-Phil

    2017-08-01

    We propose quantum information processing schemes to generate and swap entangled states based on the interactions between flying photons and quantum dots (QDs) confined within optical cavities for quantum communication. To produce and distribute entangled states (Bell and Greenberger-Horne-Zeilinger [GHZ] states) between the photonic qubits of flying photons of consumers (Alice and Bob) and electron-spin qubits of a provider (trust center, or TC), the TC employs the interactions of the QD-cavity system, which is composed of a charged QD (negatively charged exciton) inside a single-sided cavity. Subsequently, the TC constructs an entanglement channel (Bell state and 4-qubit GHZ state) to link one consumer with another through entanglement swapping, which can be realized to exploit a probe photon with interactions of the QD-cavity systems and single-qubit measurements without Bell state measurement, for quantum communication between consumers. Consequently, the TC, which has quantum nodes (QD-cavity systems), can accomplish constructing the entanglement channel (authenticated channel) between two separated consumers from the distributions of entangled states and entanglement swapping. Furthermore, our schemes using QD-cavity systems, which are feasible with a certain probability of success and high fidelity, can be experimentally implemented with technology currently in use.

  2. High resolution fiber optic surface plasmon resonance sensors with single-sided gold coatings.

    Science.gov (United States)

    Feng, Dingyi; Zhou, Wenjun; Qiao, Xueguang; Albert, Jacques

    2016-07-25

    The surface plasmon resonance (SPR) performance of gold coated tilted fiber Bragg gratings (TFBG) at near infrared wavelengths is evaluated as a function of the angle between the tilt plane orientation and the direction of single- and double-sided, nominally 50 nm-thick gold metal depositions. Scanning electron microscope images show that the coating are highly non-uniform around the fiber circumference, varying between near zero and 50 nm. In spite of these variations, the experimental results show that the spectral signature of the TFBG-SPR sensors is similar to that of simulations based on perfectly uniform coatings, provided that the depositions are suitably oriented along the tilt plane direction. Furthermore, it is shown that even a (properly oriented) single-sided coating (over only half of the fiber circumference) is sufficient to provide a theoretically perfect SPR response with a bandwidth under 5 nm, and 90% attenuation. Finally, using a pair of adjacent TFBG resonances within the SPR response envelope, a power detection scheme is used to demonstrate a limit of detection of 3 × 10-6 refractive index units.

  3. Management of single-sided deafness with the bone-anchored hearing aid.

    Science.gov (United States)

    Yuen, Heng-Wai; Bodmer, Daniel; Smilsky, Kari; Nedzelski, Julian M; Chen, Joseph M

    2009-07-01

    The benefits of the bone-anchored hearing aid (BAHA) for rehabilitation of conductive and mixed hearing loss are well established. Recently, the BAHA was used to rehabilitate patients with single-sided deafness (SSD). In this study, the benefits of the BAHA in SSD are presented. Case series with planned data collection. Tertiary referral center. Twenty-one consecutive adult patients with SSD underwent single-stage BAHA implantation on the side of deafness. Testing in sound field was performed using the hearing-in-noise test (HINT) in both unaided and aided conditions. Speech and noise signals were delivered through two speakers oriented in two test paradigms. The outcomes were expressed as signal-to-noise (S/N) ratios. Subjective benefit analyses were determined through two questionnaires: the Abbreviated Profile of Hearing Aid Benefit (APHAB) and the Glasgow Hearing Aid Benefit Profile (GHABP). All subjects demonstrated significant improvement in speech reception thresholds with the HINT using the BAHA, especially with the 90/270 speaker paradigm, in which the mean improvement over the unaided condition was 5.5 dB SPL (range, 2.0-11.0 dB; P=0.00001). Qualitative subjective outcome measures demonstrated additional benefits. In SSD patients, the BAHA provides significant subjective benefits and improves speech understanding in noise.

  4. Benefit of Baha in the elderly with single-sided deafness.

    Science.gov (United States)

    Faber, Hubert T; de Wolf, Maarten J F; Cremers, Cor W R J; Snik, Ad F M; Hol, Myrthe K S

    2013-03-01

    The objective of this study is to determine the benefits of bone-anchored hearing aid (Baha) contralateral routing of signal (CROS) in the older adult population with single-sided deafness. Five questionnaires [general usage questionnaire, Glasgow benefit inventory (GBI), Abbreviated profile of hearing aid benefit (APHAB), Nijmegen cochlear implant questionnaire and the hearing handicap inventory for the elderly-screening version (HHIE-S)] were used to evaluate Baha use. Consecutive patients over 60 years of age with SSD fitted with a Baha CROS between April 1990 and April 2007 not using a conventional hearing aid in the better-hearing ear were identified. Nine out of 11 patients (82 %) were still using their Baha CROS, and 7 of the 11 patients (64 %) were still satisfied. The patients experienced no to little problems with handling and cleaning of the device. The GBI scores show good benefit in domains total (14 ± 11) and general (19 ± 17). The APHAB shows that, overall, 3 out of the 11 patients (27 %) experienced significant benefit, while all others experienced no significant benefit and no drawbacks. The HHIE-S shows that the patients experienced severe (18 %), mild to moderate (46 %) or no handicap (36 %) when using the Baha CROS. In conclusion, the benefit of a Baha CROS for elderly patients with SSD is evident in the majority of patients.

  5. Single-side electron multipacting at the photocathode in rf guns

    Directory of Open Access Journals (Sweden)

    Jang-Hui Han

    2008-01-01

    Full Text Available Multiple electron impacting (multipacting can take place in rf fields when the rf components are composed of materials with a secondary electron yield greater than one. In rf gun cavities, multipacting may change the properties of the vacuum components or even damage them. First systematic measurements of the multipacting occurring in a photocathode rf gun were made at the Fermilab/NICADD Photoinjector Laboratory in 2000. The multipacting properties were found to depend on the cathode material and the solenoid field configuration. In this study, we measure the multipacting properties in more detail and model the secondary electron generation for numerical simulation. Measurements and simulations for the photoinjectors at Fermilab and DESY are compared. The multipacting takes place at the photocathode in rf guns and is categorized as single-side multipacting. In a low rf field, the electrons emitted from the cathode area do not leave the gun cavity within one rf cycle and have an opportunity to travel back and hit the cathode. The solenoid field distribution in the vicinity of the cathode changes the probability of electron bombardment of the cathode and makes a major contribution to the multipacting behavior.

  6. Non-destructive characterization of materials by single-sided NMR

    Energy Technology Data Exchange (ETDEWEB)

    Goga, Nicolae-Octavian

    2007-08-20

    The experiments conducted in this work demonstrate the efficiency and sensitivity of single-sided NMR for investigating macromolecular materials on large time and length scales. Elastomers can readily be characterized by unilateral NMR of protons in terms of a variety of parameters, which correlate with the overall molecular mobility. In this way information about the cross-link density, state of cure and strain, the effects of aging and product heterogeneity can obtained. For these purposes, the NMR-MOUSE was used to optimize product development and to monitor product and production quality on-line. The sensor is also suitable for nondestructive probing of the mechanical deformation in cross-linked elastomers. A special magnet design that fits a stress-strain device has been used for complementary investigation of a series of different rubber stripes during mechanical testing. The profile NMR-MOUSE was found to be a unique tool for the characterization of changes induced by the UV irradiation in natural rubber. The aging profiles were interpreted for the first time based on a novel model in which the radiation absorption coefficient depends on the depth in the sample. (orig.)

  7. Portable Electromyograph

    Science.gov (United States)

    De Luca, Gianluca; De Luca, Carlo J.; Bergman, Per

    2004-01-01

    A portable electronic apparatus records electromyographic (EMG) signals in as many as 16 channels at a sampling rate of 1,024 Hz in each channel. The apparatus (see figure) includes 16 differential EMG electrodes (each electrode corresponding to one channel) with cables and attachment hardware, reference electrodes, an input/output-and-power-adapter unit, a 16-bit analog-to-digital converter, and a hand-held computer that contains a removable 256-MB flash memory card. When all 16 EMG electrodes are in use, full-bandwidth data can be recorded in each channel for as long as 8 hours. The apparatus is powered by a battery and is small enough that it can be carried in a waist pouch. The computer is equipped with a small screen that can be used to display the incoming signals on each channel. Amplitude and time adjustments of this display can be made easily by use of touch buttons on the screen. The user can also set up a data-acquisition schedule to conform to experimental protocols or to manage battery energy and memory efficiently. Once the EMG data have been recorded, the flash memory card is removed from the EMG apparatus and placed in a flash-memory- card-reading external drive unit connected to a personal computer (PC). The PC can then read the data recorded in the 16 channels. Preferably, before further analysis, the data should be stored in the hard drive of the PC. The data files are opened and viewed on the PC by use of special- purpose software. The software for operation of the apparatus resides in a random-access memory (RAM), with backup power supplied by a small internal lithium cell. A backup copy of this software resides on the flash memory card. In the event of loss of both main and backup battery power and consequent loss of this software, the backup copy can be used to restore the RAM copy after power has been restored. Accessories for this device are also available. These include goniometers, accelerometers, foot switches, and force gauges.

  8. BAHA in single-sided deafness: patient compliance and subjective benefit.

    Science.gov (United States)

    Schrøder, Stine Attrup; Ravn, Tomaas; Bonding, Per

    2010-04-01

    Despite most patients with single-sided deafness (SSD) after operation for acoustic neuroma (AN) perceiving a significant hearing handicap, less than 25% are interested in bone-anchored hearing aid (BAHA) implantation. We evaluated the treatment compliance of BAHA in SSD and the effect of BAHA on the subjective handicap. Part 1: It was determined, from our first study, how many of the SDD patients after operation for AN (n = 59) and interested in BAHA (n = 14) had been implanted. Part 2: Of 23 BAHA-implanted patients with SSD due to various causes, including the implanted patients from the previous study, 21 answered a questionnaire on the BAHA treatment compliance and the subjective handicap with and without BAHA. Part 1: Of the 14 patients from our first study who were interested in implantation for BAHA, 11 had been implanted (18.6% of all 59 patients). Part 2: Of the 21 patients with SSD, 95% still used BAHA, and of these, 81% used it more than 8 hours a day. Of the patients, 90% considered BAHA a moderate to significant aid; it reduced the subjective hearing handicap from 7.4 to 2.3 arbitrary units on a visual analog scale. Despite the subjective handicap perception among most patients with SSD after AN surgery, less than 20% chose treatment with BAHA. Conversely, patients with SSD choosing implantation had high treatment compliance and felt that BAHA reduced their handicap. Thus, when selected by the patients after testing, BAHA is effective in SSD and results in a high patient compliance.

  9. Single-sided mobile NMR apparatus using the transverse flux of a single permanent magnet.

    Science.gov (United States)

    Chang, Wei-Hao; Chen, Jyh-Horng; Hwang, Lian-Pin

    2010-01-01

    This study presents a simple design for a mobile, single-sided nuclear magnetic resonance (NMR) apparatus which uses the magnetic flux parallel to the magnetization direction of a single, disc-shaped permanent magnet polarized in radial direction. The stray magnetic field above the magnet is approximately parallel to the magnetization direction of the magnet and is utilized as the B(0) magnetic field of the apparatus. The apparatus weighs 1.8 kg, has a compact structure and can be held in one's palm. The apparatus generates a B(0) field strength of about 0.279 T at the center of apparatus surface and can acquire a clear Hahn echo signal of a pencil eraser block lying on the RF coil in one shot. Moreover, a strong static magnetic field gradient exists in the direction perpendicular to the apparatus surface. The strength of the static magnetic field gradient near the center of the apparatus surface is about 10.2 T/m; one-dimensional imaging of thin objects and liquid self-diffusion coefficient measurements can be performed therein. The available spatial resolution of the one-dimensional imaging experiments using a 5 x 5 mm horizontal sample area is about 200 mum. Several nondestructive inspection applications of the apparatus, including distinguishing between polyethylene grains of different densities, characterizing epoxy putties of distinct set times and evaluating the fat content percentages of milk powders, are also demonstrated. Compared with many previously published designs, the proposed design bears a simple structure and generates a B(0) magnetic field parallel to the apparatus surface, simplifying apparatus construction and simultaneously rendering the selection of the radiofrequency coil relatively flexible.

  10. Release and characterization of single side chains of white cabbage pectin and their complement-fixing activity

    NARCIS (Netherlands)

    Westereng, B.; Coenen, G.J.; Michaelsen, T.E.; Voragen, A.G.J.; Samuelsen, A.B.; Schols, H.A.; Knutsen, S.H.

    2009-01-01

    A mixture of single side chains from white cabbage pectin were obtained by anion exchange chromatography after applying mild chemical conditions promoting -elimination. These pectin fragments were characterized by their molecular weight distribution, sugar composition, 13C-NMR, and MALDI-TOF-MS

  11. Cochlear implantation for patients with single-sided deafness or asymmetrical hearing loss : A systematic review of the evidence

    NARCIS (Netherlands)

    Van Zon, Alice; Peters, Jeroen P M; Stegeman, Inge; Smit, Adriana L.; Grolman, Wilko

    2015-01-01

    OBJECTIVE: A systematic review of the literature to evaluate the clinical outcome of cochlear implantation for patients with single-sided deafness (SSD) or asymmetrical hearing loss (AHL). DATA SOURCES: We searched the PubMed, Embase, Cochrane Library, and CINAHL databases from their inception up to

  12. Systematic Review on the Trial Period for Bone Conduction Devices in Single-Sided Deafness : Rates and Reasons for Rejection

    NARCIS (Netherlands)

    Wendrich, Anne W.; Kroese, Tiuri E.; Peters, Jeroen P.M.; Cattani, Guido; Grolman, Wilko

    2017-01-01

    Objective: To systematically review the literature to evaluate the trial period of bone conduction devices (BCDs) for adult patients with single-sided deafness (SSD). Data Sources: The PubMed, Embase, and Cochrane Library databases were searched from their inception up to August 15, 2016 for SSD,

  13. Towards a Unified Testing Framework for Single-Sided Deafness Studies: A Consensus Paper.

    Science.gov (United States)

    Van de Heyning, Paul; Távora-Vieira, Dayse; Mertens, Griet; Van Rompaey, Vincent; Rajan, Gunesh P; Müller, Joachim; Hempel, John Martin; Leander, Daniel; Polterauer, Daniel; Marx, Mathieu; Usami, Shin-Ichi; Kitoh, Ryosuke; Miyagawa, Maiko; Moteki, Hideaki; Smilsky, Kari; Baumgartner, Wolf-Dieter; Keintzel, Thomas Georg; Sprinzl, Georg Mathias; Wolf-Magele, Astrid; Arndt, Susan; Wesarg, Thomas; Zirn, Stefan; Baumann, Uwe; Weissgerber, Tobias; Rader, Tobias; Hagen, Rudolf; Kurz, Anja; Rak, Kristen; Stokroos, Robert; George, Erwin; Polo, Ruben; Medina, María Del Mar; Henkin, Yael; Hilly, Ohad; Ulanovski, David; Rajeswaran, Ranjith; Kameswaran, Mohan; Di Gregorio, Maria Fernanda; Zernotti, Mario E

    2016-01-01

    While hearing aids for a contralateral routing of signals (CROS-HA) and bone conduction devices have been the traditional treatment for single-sided deafness (SSD) and asymmetric hearing loss (AHL), in recent years, cochlear implants (CIs) have increasingly become a viable treatment choice, particularly in countries where regulatory approval and reimbursement schemes are in place. Part of the reason for this shift is that the CI is the only device capable of restoring bilateral input to the auditory system and hence of possibly reinstating binaural hearing. Although several studies have independently shown that the CI is a safe and effective treatment for SSD and AHL, clinical outcome measures in those studies and across CI centers vary greatly. Only with a consistent use of defined and agreed-upon outcome measures across centers can high-level evidence be generated to assess the safety and efficacy of CIs and alternative treatments in recipients with SSD and AHL. This paper presents a comparative study design and minimum outcome measures for the assessment of current treatment options in patients with SSD/AHL. The protocol was developed, discussed, and eventually agreed upon by expert panels that convened at the 2015 APSCI conference in Beijing, China, and at the CI 2016 conference in Toronto, Canada. A longitudinal study design comparing CROS-HA, BCD, and CI treatments is proposed. The recommended outcome measures include (1) speech in noise testing, using the same set of 3 spatial configurations to compare binaural benefits such as summation, squelch, and head shadow across devices; (2) localization testing, using stimuli that rove in both level and spectral content; (3) questionnaires to collect quality of life measures and the frequency of device use; and (4) questionnaires for assessing the impact of tinnitus before and after treatment, if applicable. A protocol for the assessment of treatment options and outcomes in recipients with SSD and AHL is presented

  14. Smart portable rehabilitation devices

    Directory of Open Access Journals (Sweden)

    Leahey Matt

    2005-07-01

    Full Text Available Abstract Background The majority of current portable orthotic devices and rehabilitative braces provide stability, apply precise pressure, or help maintain alignment of the joints with out the capability for real time monitoring of the patient's motions and forces and without the ability for real time adjustments of the applied forces and motions. Improved technology has allowed for advancements where these devices can be designed to apply a form of tension to resist motion of the joint. These devices induce quicker recovery and are more effective at restoring proper biomechanics and improving muscle function. However, their shortcoming is in their inability to be adjusted in real-time, which is the most ideal form of a device for rehabilitation. This introduces a second class of devices beyond passive orthotics. It is comprised of "active" or powered devices, and although more complicated in design, they are definitely the most versatile. An active or powered orthotic, usually employs some type of actuator(s. Methods In this paper we present several new advancements in the area of smart rehabilitation devices that have been developed by the Northeastern University Robotics and Mechatronics Laboratory. They are all compact, wearable and portable devices and boast re-programmable, real time computer controlled functions as the central theme behind their operation. The sensory information and computer control of the three described devices make for highly efficient and versatile systems that represent a whole new breed in wearable rehabilitation devices. Their applications range from active-assistive rehabilitation to resistance exercise and even have applications in gait training. The three devices described are: a transportable continuous passive motion elbow device, a wearable electro-rheological fluid based knee resistance device, and a wearable electrical stimulation and biofeedback knee device. Results Laboratory tests of the devices

  15. Slab-mantle interactions in simulations of self-consistent mantle convection with single-sided subduction

    Science.gov (United States)

    Crameri, F.; Tackley, P. J.; Meilick, I.; Gerya, T. V.; Kaus, B. J. P.

    2012-04-01

    Subduction zones on present-day Earth are strongly asymmetric features (Zhao 2004) composed of an overriding plate above a subducting plate that sinks into the mantle. Our recent advances in numerical modelling allow global mantle convection models to produce single-sided subduction self-consistently by allowing for free surface topography on and lubrication between the converging plates (Crameri et al., 2012). Thereby, they are indicating important mantle-slab interactions. The increase of viscosity with depth is an important mantle property affecting the dynamics of subduction: a large viscosity increase on the one hand favours an immediate stagnant lid because the slab cannot sink fast enough, while a small increase on the other hand does not provide enough resistance for the sinking slab and therefore facilitates an immediate slab break-off. While in the mobile lid (plate tectonic like) regime, our model also shows that single-sided subduction in turn has strong implications on Earth's interior such as its rms. velocity or its stress distribution. The arcuate trench curvature is such a feature that is caused by single-sided subduction in 3-D geometry. The pressure difference between the mantle region below the inclined sinking slab and the region above it causes a toroidal mantle flow around the slab edges. This flow of mantle material is responsible for forming the slabs and subsequently also the subduction trenches above it towards an arcuate shape. For this study we perform experiments in 2-D and global spherical 3-D, fully dynamic mantle convection models with self-consistent plate tectonics. These are calculated using the finite volume multi-grid code StagYY (Tackley 2008) with strongly temperature and pressure-dependent viscosity, ductile and/or brittle plastic yielding, and non-diffusive tracers tracking compositional variations (the 'air' and the weak crustal layer in this case).

  16. Long-term subjective benefit with a bone conduction implant sound processor in 44 patients with single-sided deafness.

    Science.gov (United States)

    Desmet, Jolien; Wouters, Kristien; De Bodt, Marc; Van de Heyning, Paul

    2014-07-01

    Studies that investigate the subjective benefit from a bone conduction implant (BCI) sound processor in patients with single-sided sensorineural deafness (SSD) have been limited to examining short- and mid-term benefit. In the current study, we performed a survey among 44 SSD BCI users with a median follow-up time of 50 months. Forty-four experienced SSD BCI users participated in the survey, which consisted of the Abbreviated Profile of Hearing Aid Benefit, the Single-Sided Deafness Questionnaire, the Short Hearing Handicap Inventory for Adults, and a self-made user questionnaire. For patients with tinnitus, the Tinnitus Questionnaire was also completed. The results of the survey were correlated with contralateral hearing loss, age at implantation, duration of the hearing loss at the time of implantation, duration of BCI use, and the presence and burden of tinnitus. In total, 86% of the patients still used their sound processor. The Abbreviated Profile of Hearing Aid Benefit and the Short Hearing Handicap Inventory for Adults show a statistically significant overall improvement with the BCI. The Single-Sided Deafness Questionnaire and the user questionnaire showed that almost 40% of the patients reported daily use of the sound processor. However, the survey of daily use reveals benefit only in certain circumstances. Speech understanding in noisy situations is rated rather low, and 58% of all patients reported that their BCI benefit was less than expected. The majority of the patients reported an overall improvement from using their BCI. However, the number of users decreases during a longer follow-up time and patients get less enthusiastic about the device after an extended period of use, especially in noisy situations. However, diminished satisfaction because of time-related reductions in processor function could not be ruled out.

  17. Recrystallized thin-film silicon solar cell on graphite substrate with laser single side contact and hydrogen passivation

    Directory of Open Access Journals (Sweden)

    Li Da

    2015-01-01

    Full Text Available Laser single side contact formation (LSSC and the hydrogen passivation process are studied and developed for crystalline silicon thin film (CSiTF solar cells on graphite substrates. The results demonstrate that these two methods can improve cell performance by increasing the open circuit voltage and fill factor. In comparison with our previous work, we have achieved an increase of 3.4% absolute cell efficiency for a 40 μm thick 4 cm2 aperture area silicon thin film solar cell on graphite substrate. Current density-voltage (J-V measurement, quantum efficiency (QE and light beam induced current (LBiC are used as characterization methods.

  18. A DANREF certified reference plastic for measurement of overall migration into the food simulant olive oil by single sided testing

    DEFF Research Database (Denmark)

    Lund, K. H.; Lillemark, L.; Petersen, Jens Højslev

    2000-01-01

    A reference material for the determination of overall migration from a plastic coextrudate into the fatty food simulant olive oil was produced and certified in an interlaboratory study. The analyses were carried out according to the ENV 1186 standard from the European Committee for Standardization...... (CEN) [1, 2, 3] with exposure of the coextrudate to olive oil for 10 days at 40 degrees C. After an initial preliminary interlaboratory study eight laboratories participated in the certification round, and two different methods were used to obtain single sided exposure of the plastic to the oil...

  19. Consequences of Stimulus Type on Higher-Order Processing in Single-Sided Deaf Cochlear Implant Users.

    Science.gov (United States)

    Finke, Mareike; Sandmann, Pascale; Bönitz, Hanna; Kral, Andrej; Büchner, Andreas

    2016-01-01

    Single-sided deaf subjects with a cochlear implant (CI) provide the unique opportunity to compare central auditory processing of the electrical input (CI ear) and the acoustic input (normal-hearing, NH, ear) within the same individual. In these individuals, sensory processing differs between their two ears, while cognitive abilities are the same irrespectively of the sensory input. To better understand perceptual-cognitive factors modulating speech intelligibility with a CI, this electroencephalography study examined the central-auditory processing of words, the cognitive abilities, and the speech intelligibility in 10 postlingually single-sided deaf CI users. We found lower hit rates and prolonged response times for word classification during an oddball task for the CI ear when compared with the NH ear. Also, event-related potentials reflecting sensory (N1) and higher-order processing (N2/N4) were prolonged for word classification (targets versus nontargets) with the CI ear compared with the NH ear. Our results suggest that speech processing via the CI ear and the NH ear differs both at sensory (N1) and cognitive (N2/N4) processing stages, thereby affecting the behavioral performance for speech discrimination. These results provide objective evidence for cognition to be a key factor for speech perception under adverse listening conditions, such as the degraded speech signal provided from the CI. © 2016 S. Karger AG, Basel.

  20. Measuring diffusion-relaxation correlation maps using non-uniform field gradients of single-sided NMR devices.

    Science.gov (United States)

    Nogueira d'Eurydice, Marcel; Galvosas, Petrik

    2014-11-01

    Single-sided NMR systems are becoming a relevant tool in industry and laboratory environments due to their low cost, low maintenance and capacity to evaluate quantity and quality of hydrogen based materials. The performance of such devices has improved significantly over the last decade, providing increased field homogeneity, field strength and even controlled static field gradients. For a class of these devices, the configuration of the permanent magnets provides a linear variation of the magnetic field and can be used in diffusion measurements. However, magnet design depends directly on its application and, according to the purpose, the field homogeneity may significantly be compromised. This may prevent the determination of diffusion properties of fluids based on the natural inhomogeneity of the field using known techniques. This work introduces a new approach that extends the applicability of diffusion-editing CPMG experiments to NMR devices with highly inhomogeneous magnetic fields, which do not vary linearly in space. Herein, we propose a method to determine a custom diffusion kernel based on the gradient distribution, which can be seen as a signature of each NMR device. This new diffusion kernel is then utilised in the 2D inverse Laplace transform (2D ILT) in order to determine diffusion-relaxation correlation maps of homogeneous multi-phasic fluids. The experiments were performed using NMR MObile Lateral Explore (MOLE), which is a single-sided NMR device designed to maximise the volume at the sweet spot with enhanced depth penetration. Copyright © 2014 Elsevier Inc. All rights reserved.

  1. Low-field single-sided NMR for one-shot 1D-mapping: Application to membranes

    Science.gov (United States)

    Judeinstein, Patrick; Ferdeghini, Filippo; Oliveira-Silva, Rodrigo; Zanotti, Jean-Marc; Sakellariou, Dimitrios

    2017-04-01

    Many single-sided permanent magnet NMR systems have been proposed over the years allowing for 1D proton-density profiling, diffusion measurements and relaxometry. In this manuscript we make use of a recently published unilateral magnet for low-field NMR exhibiting an extremely uniform magnetic field gradient with moderate strength and cylindrical symmetry, allowing for a well-defined sweet spot. Combined with a goniometer, our system is used to characterize precisely the uniformity of its gradient and to achieve micrometric precision 1D profiling, as well as spatially localized relaxometry and diffusometry on thick (∼150 μm) membrane samples. Profiling with this magnet did not require repositioning of the samples with respect to the 1D tomograph.

  2. Horizontal plane localization in single-sided deaf adults fitted with a bone-anchored hearing aid (Baha).

    Science.gov (United States)

    Grantham, D Wesley; Ashmead, Daniel H; Haynes, David S; Hornsby, Benjamin W Y; Labadie, Robert F; Ricketts, Todd A

    2012-01-01

    : One purpose of this investigation was to evaluate the effect of a unilateral bone-anchored hearing aid (Baha) on horizontal plane localization performance in single-sided deaf adults who had either a conductive or sensorineural hearing loss in their impaired ear. The use of a 33-loudspeaker array allowed for a finer response measure than has previously been used to investigate localization in this population. In addition, a detailed analysis of error patterns allowed an evaluation of the contribution of random error and bias error to the total rms error computed in the various conditions studied. A second purpose was to investigate the effect of stimulus duration and head-turning on localization performance. : Two groups of single-sided deaf adults were tested in a localization task in which they had to identify the direction of a spoken phrase on each trial. One group had a sensorineural hearing loss (SNHL group; N = 7), and the other group had a conductive hearing loss (CHL group; N = 5). In addition, a control group of four normal-hearing adults was tested. The spoken phrase was either 1250 msec in duration (a male saying "Where am I coming from now?") or 341 msec in duration (the same male saying "Where?"). For the longer-duration phrase, subjects were tested in conditions in which they either were or were not allowed to move their heads before the termination of the phrase. The source came from one of nine positions in the front horizontal plane (from -79° to +79°). The response range included 33 choices (from -90° to +90°, separated by 5.6°). Subjects were tested in all stimulus conditions, both with and without the Baha device. Overall rms error was computed for each condition. Contributions of random error and bias error to the overall error were also computed. : There was considerable intersubject variability in all conditions. However, for the CHL group, the average overall error was significantly smaller when the Baha was on than when it was off

  3. Low-field single-sided NMR for one-shot 1D-mapping: Application to membranes.

    Science.gov (United States)

    Judeinstein, Patrick; Ferdeghini, Filippo; Oliveira-Silva, Rodrigo; Zanotti, Jean-Marc; Sakellariou, Dimitrios

    2017-04-01

    Many single-sided permanent magnet NMR systems have been proposed over the years allowing for 1D proton-density profiling, diffusion measurements and relaxometry. In this manuscript we make use of a recently published unilateral magnet for low-field NMR exhibiting an extremely uniform magnetic field gradient with moderate strength and cylindrical symmetry, allowing for a well-defined sweet spot. Combined with a goniometer, our system is used to characterize precisely the uniformity of its gradient and to achieve micrometric precision 1D profiling, as well as spatially localized relaxometry and diffusometry on thick (∼150μm) membrane samples. Profiling with this magnet did not require repositioning of the samples with respect to the 1D tomograph. Copyright © 2017 Elsevier Inc. All rights reserved.

  4. Single-Sided Digital Microfluidic (SDMF Devices for Effective Coolant Delivery and Enhanced Two-Phase Cooling

    Directory of Open Access Journals (Sweden)

    Sung-Yong Park

    2016-12-01

    Full Text Available Digital microfluidics (DMF driven by electrowetting-on-dielectric (EWOD has recently been attracting great attention as an effective liquid-handling platform for on-chip cooling. It enables rapid transportation of coolant liquid sandwiched between two parallel plates and drop-wise thermal rejection from a target heating source without additional mechanical components such as pumps, microchannels, and capillary wicks. However, a typical sandwiched configuration in DMF devices only allows sensible heat transfer, which seriously limits heat rejection capability, particularly for high-heat-flux thermal dissipation. In this paper, we present a single-sided digital microfluidic (SDMF device that enables not only effective liquid handling on a single-sided surface, but also two-phase heat transfer to enhance thermal rejection performance. Several droplet manipulation functions required for two-phase cooling were demonstrated, including continuous droplet injection, rapid transportation as fast as 7.5 cm/s, and immobilization on the target hot spot where heat flux is locally concentrated. Using the SDMF platform, we experimentally demonstrated high-heat-flux cooling on the hydrophilic-coated hot spot. Coolant droplets were continuously transported to the target hot spot which was mitigated below 40 K of the superheat. The effective heat transfer coefficient was stably maintained even at a high heat flux regime over ~130 W/cm2, which will allow us to develop a reliable thermal management module. Our SDMF technology offers an effective on-chip cooling approach, particularly for high-heat-flux thermal management based on two-phase heat transfer.

  5. A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus

    Directory of Open Access Journals (Sweden)

    Jae-Jin Song

    2017-05-01

    Full Text Available The mechanism of tinnitus suppression after cochlear implantation (CI in single-sided deafness (SSD is not fully understood. In this regard, by comparing pre- and post-CI quantitative electroencephalography (qEEG, we explored cortical changes relevant to tinnitus improvement. In SSD patients who underwent CI, qEEG data were collected: (1 before CI, (2 6 months post-operatively with CI-on, and (3 30 min after CI-off and source-localized cortical activity/functional connectivity analyses were performed. Compared to the pre-operative baseline, the CI-on condition demonstrated significantly decreased activity in the right auditory- and orbitofrontal cortices (OFC for the delta frequency band as well as decreased connectivity between the auditory cortex/posterior cingulate cortex for the delta/beta2 bands. Meanwhile, compared to the CI-off condition, the CI-on condition displayed decreased activity in the right auditory cortices/OFC for the delta band, and in bilateral auditory cortices, left inferior frontal cortex/OFC for the gamma band. However, qEEG analyses showed no significant differences between the CI-off and baseline conditions. CI induced overall decreased cortical activity and functional connectivity. However, judging from no differences between the CI-off and baseline conditions, CI-induced cortical activity and functional connectivity changes are not by cortical plastic changes, but by dynamic peripheral reafferentation.

  6. Nonlinear dynamic analysis of single-sided and single-mass crushing system under impact and vibration

    Directory of Open Access Journals (Sweden)

    Suhuan NI

    2017-10-01

    Full Text Available To research and develop efficient vibrating type crusher, a single-sided dynamic model is established for the impact and vibration crushing system, and the differential equation of vibration is set up with Newton's law for dynamic analysis. By making amplitude frequency curve, hysteretic impact force curve and energy absorption curve, the influence of which on the system response is analyzed. Based on the conclusion and using numerical method, the primary forced resonance of the system is calculated, and the time history of displacement, velocity and acceleration is obtained, showing that the motion mass movement is not a simple harmonic motion, the nonlinear impact force is one of the factors that influences the vibration system, and the influence rules of clearance, vibration frequency on the amplitude frequency curve, impact force and energy absorption are also obtained. The gap between the material and the broken head should be kept as small as possible so as to achieve a better crushing effect with a smaller excitation force, and the system is best to work in the main resonant area to get a big impact. The research result provides reference for further study of rules and mechanism of the vibration systems.

  7. Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity.

    Science.gov (United States)

    Hu, C Y

    2017-03-28

    The future Internet is very likely the mixture of all-optical Internet with low power consumption and quantum Internet with absolute security guaranteed by the laws of quantum mechanics. Photons would be used for processing, routing and com-munication of data, and photonic transistor using a weak light to control a strong light is the core component as an optical analogue to the electronic transistor that forms the basis of modern electronics. In sharp contrast to previous all-optical tran-sistors which are all based on optical nonlinearities, here I introduce a novel design for a high-gain and high-speed (up to terahertz) photonic transistor and its counterpart in the quantum limit, i.e., single-photon transistor based on a linear optical effect: giant Faraday rotation induced by a single electronic spin in a single-sided optical microcavity. A single-photon or classical optical pulse as the gate sets the spin state via projective measurement and controls the polarization of a strong light to open/block the photonic channel. Due to the duality as quantum gate for quantum information processing and transistor for optical information processing, this versatile spin-cavity quantum transistor provides a solid-state platform ideal for all-optical networks and quantum networks.

  8. A study of interunit dispersion around multistory buildings with single-sided ventilation under different wind directions

    Science.gov (United States)

    Ai, Z. T.; Mak, C. M.

    2014-05-01

    This study examines the interunit dispersion characteristics in and around multistory buildings under wind-induced single-sided ventilation conditions using computational fluid dynamics (CFD) method, under the hypothesis that infectious respiratory aerosols exhausted from a unit can reenter into another unit in a same building through opened windows. The effect of balconies on the interunit dispersion pattern is considered. The RNG k - ɛ model and the two-layer near-wall model are employed to establish the coupled indoor and outdoor airflow field, and the tracer gas technique is adopted to simulate pollutant dispersion. Reentry ratios from each unit to other units under prevailing wind directions are quantified and the possible interunit dispersion routes are then revealed. It is found that many reentry ratios appear to reach around 10.0%, suggesting that the interunit dispersion is an important pollutant transmission route. The interunit dispersion pattern is highly dependent on the incident wind direction and the fact whether the building has protrusive envelope features. On average, the strongest dispersion occurs on the windward wall of the buildings under oblique wind direction, owing to high ACH (air change per hour) values and unidirectional spread routes. Except under a normal incident wind, the presence of balconies intensifies the interunit dispersion by forming dispersion channels to increase the reentry ratios.

  9. Using single side-band modulation for colorless OFDM-WDM access network to alleviate Rayleigh backscattering effects.

    Science.gov (United States)

    Yeh, Chien-Hung; Chow, Chi-Wai

    2016-05-16

    In this investigation, we demonstrate a new colorless orthogonal-frequency-division-multiplexing (OFDM) wavelength-division-multiplexing passive optical network (WDM-PON) system with Rayleigh backscattering (RB) noise mitigation. Here, only a single laser source at the central office (CO) is needed to produce the downstream signal and distributed continuous-wave (CW) carrier, which will then be modulated at the optical networking unit (ONU) to produce the upstream signal. Single side-band (SSB) modulation is used to wavelength-shift the distributed CW carrier, which will be launched into a reflective semiconductor optical amplifier (RSOA) based ONU for directly modulation of 5.15 Gbps OFDM upstream signal. To avoid the radio-frequency (RF) power fading and chromatic fiber dispersion, the four-band OFDM modulation is proposed to generate a 40 Gbps downstream when a Mach-Zehnder modulator (MZM) with -0.7 chirp parameter is used. Hence, the RB circumvention can be centralized in the CO. Moreover, the signal performances of downstream and upstream are also studied and discussed in this measurement.

  10. Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity

    Science.gov (United States)

    Hu, C. Y.

    2017-03-01

    The future Internet is very likely the mixture of all-optical Internet with low power consumption and quantum Internet with absolute security guaranteed by the laws of quantum mechanics. Photons would be used for processing, routing and com-munication of data, and photonic transistor using a weak light to control a strong light is the core component as an optical analogue to the electronic transistor that forms the basis of modern electronics. In sharp contrast to previous all-optical tran-sistors which are all based on optical nonlinearities, here I introduce a novel design for a high-gain and high-speed (up to terahertz) photonic transistor and its counterpart in the quantum limit, i.e., single-photon transistor based on a linear optical effect: giant Faraday rotation induced by a single electronic spin in a single-sided optical microcavity. A single-photon or classical optical pulse as the gate sets the spin state via projective measurement and controls the polarization of a strong light to open/block the photonic channel. Due to the duality as quantum gate for quantum information processing and transistor for optical information processing, this versatile spin-cavity quantum transistor provides a solid-state platform ideal for all-optical networks and quantum networks.

  11. Optically Generated Single Side-Band Radio-over-Fiber Transmission of 60Gbit/s over 50m at W-Band

    DEFF Research Database (Denmark)

    Puerta Ramírez, Rafael; Rommel, Simon; Vegas Olmos, Juan José

    2017-01-01

    60 Gbit/s single side-band multi-band CAP radio-over-fiber transmission at W-band is demonstrated. A spectral efficiency of 3.8 bit/s/Hz and bit error rates below 3.8×10-3 are achieved after 50 m wireless transmission.......60 Gbit/s single side-band multi-band CAP radio-over-fiber transmission at W-band is demonstrated. A spectral efficiency of 3.8 bit/s/Hz and bit error rates below 3.8×10-3 are achieved after 50 m wireless transmission....

  12. Single-sided deafness & directional hearing: contribution of spectral cues and high-frequency hearing loss in the hearing ear

    Directory of Open Access Journals (Sweden)

    Martijn Johannes Hermanus Agterberg

    2014-07-01

    Full Text Available Direction-specific interactions of sound waves with the head, torso and pinna provide unique spectral-shape cues that are used for the localization of sounds in the vertical plane, whereas horizontal sound localization is based primarily on the processing of binaural acoustic differences in arrival time (interaural time differences, or ITDs and sound level (interaural level differences, or ILDs. Because the binaural sound-localization cues are absent in listeners with total single-sided deafness (SSD, their ability to localize sound is heavily impaired. However, some studies have reported that SSD listeners are able, to some extent, to localize sound sources in azimuth, although the underlying mechanisms used for localization are unclear. To investigate whether SSD listeners rely on monaural pinna-induced spectral-shape cues of their hearing ear for directional hearing, we investigated localization performance for low-pass filtered (LP, 3 kHz and broadband (BB, 0.5 – 20 kHz noises in the two-dimensional frontal hemifield. We tested whether localization performance of SSD listeners further deteriorated when the pinna cavities of their hearing ear were filled with a mold that disrupted their spectral-shape cues. To remove the potential use of perceived sound level as an invalid azimuth cue, we randomly varied stimulus presentation levels over a broad range (45-65 dB SPL. Several listeners with SSD could localize HP and BB sound sources in the horizontal plane, but inter-subject variability was considerable. Localization performance of these listeners strongly reduced after diminishing of their spectral pinna-cues. We further show that inter-subject variability of SSD can be explained to a large extent by the severity of high-frequency hearing loss in their hearing ear.

  13. Ultrasound-guided perineural injection for nerve blockade: Does a single-sided injection produce circumferential nerve coverage?

    Science.gov (United States)

    Nwawka, O Kenechi; Miller, Theodore T; Jawetz, Shari T; Saboeiro, Gregory R

    2016-10-01

    Our current clinical technique for sonographic-guided perineural injection consists of two-sided perineural needle placement to obtain circumferential distribution of the injectate. This study aimed to determine if a single-side needle position will produce circumferential nerve coverage. Fresh-frozen cadaveric specimens were used for this study. In six upper extremities, a needle was positioned along the deep surface of median, radial, and ulnar nerves in the carpal tunnel, radial tunnel, and cubital tunnel, respectively, and 2 ml of contrast was injected for each nerve. In three pelvic specimens, a needle was positioned deep to the sciatic nerves bilaterally, and 5 ml of contrast was injected. An additional four median nerve injections were performed using superficial surface needle position. The specimens then underwent CT scanning to assess the distribution of the perineural contrast medium. One hundred percent of the radial, ulnar, and sciatic nerves demonstrated circumferential distribution on CT. Only 50% of the median nerve injections with the needle placed deep to the nerve produced circumferential coverage, whereas 100% of median nerves injected with the needle between the nerve and retinaculum demonstrated circumferential coverage. The average length of spread of perineural injectate was 11.6 cm in the upper extremity and 10.3 cm for the sciatic nerves. Using clinical volumes of fluid, needle positioning at the deep surface of upper extremity and sciatic nerves was sufficient to produce circumferential coating of the nerve, except in the carpal tunnel, where placement of the needle between the nerve and flexor retinaculum is recommended. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound 44:465-469, 2016. © 2016 Wiley Periodicals, Inc.

  14. Functional Testing of Subcutaneous Piezoelectrically Actuated Hearing Aid: Comparison With BAHA and Potential for Treating Single-sided Deafness.

    Science.gov (United States)

    Kotiya, Akhilesh; Bance, Manohar; Leadbetter, Jeff; Brown, Jeremy; Adamson, Rob

    2016-07-01

    To compare the performance of a subcutaneous piezoelectrically actuated hearing aid (SPAHA) with the bone-anchored hearing aid (BAHA) and assess its effectiveness as a treatment option for conductive loss and single-sided deafness (SSD). To validate the use of the SPAHA as a bone conduction implant, its performance was compared with a widely used bone conduction implant, the BAHA. Maximum dynamic range, power consumed to deliver standard speech signals and total harmonic distortion (THD) was assessed. The transcranial attenuation was also measured to assess the SPAHA's potential to treat SSD. Functional testing of the SPAHA and BAHA was conducted using cadaver heads. Ipsilateral and contralateral promontory velocity and the power consumption by the devices were measured at 111 different frequencies in the range of 200 to 9600 Hz. Performance metrics were derived from these measurements. The maximum dynamic range for SPAHA was within 10 dB of that of BAHA. The THD for the SPAHA was at most 3%, slightly better than the BAHA. The power consumption by the SPAHA, whereas highly variable, was not statistically different than that of the BAHA. Transcranical attenuation in case of SPAHA was 5 to 10 dB across the measured frequency range. From observed dynamic range and THD, the speech quality delivered by the SPAHA should equal or exceed that delivered by the BAHA. To attain equivalent hearing sensation at lower frequencies, the drive voltage for SPAHA would have to be significantly higher than that for BAHA. For typical speech inputs the power consumption requirements of the SPAHA should be roughly equal to those of the BAHA. Given its performance at high frequencies, the SPAHA seems well-suited to treating SSD.

  15. Wind-induced single-sided natural ventilation in buildings near a long street canyon: CFD evaluation of street configuration and envelope design

    DEFF Research Database (Denmark)

    Ai, Z.T.; Mak, C.M.

    2018-01-01

    an urban context, this study investigates the wind-induced single-sided natural ventilation in buildings near a long street canyon under a perpendicular wind direction using CFD method. Four aspect ratios (AR) of the street canyon, from 1.0, 2.0, 4.0 to 6.0, are investigated to examine the influence...

  16. [Design and application of portable rescue vehicle].

    Science.gov (United States)

    Guo, Ying; Qi, Huaying; Wang, Shen

    2017-12-01

    The disease of critically ill patients was with rapid changes, and at any time faced the risk of emergency. The current commonly used rescue vehicles were larger and bulky implementation, which were not conducive to the operation, therefore the design of a portable rescue vehicle was needed. This new type of rescue vehicle is multi-layer folding structure, with small footprint, large storage space, so a variety of first aid things can be classified and put, easy to be cleaned and disinfected. In the rescue process, the portable rescue vehicles can be placed in the required position; box of various emergency items can be found at a glance with easy access; the height of the infusion stand can adjust freely according to the user height; the rescue vehicle handle can be easy to pull and adjust accord with human body mechanics principle. The portable rescue vehicle facilitates the operation of medical staff, and is worthy of clinical application.

  17. A Portable Passive Physiotherapeutic Exoskeleton

    Directory of Open Access Journals (Sweden)

    Dasheek Naidu

    2012-10-01

    Full Text Available The public healthcare system in South Africa is in need of urgent attention in no small part because there has been an escalation in the number of stroke victims which could be due to the increase in hypertension in this urbanizing society. There is a growing need for physiotherapists and occupational therapists in the country, which is further hindered by the division between urban and rural areas. A possible solution is a portable passive physiotherapeutic exoskeleton device. The exoskeleton device has been formulated to encapsulate methodologies that enable the anthropomorphic integration between a biological and mechatronic limb. A physiotherapeutic mechanism was designed to be portable and adjustable, without limiting the spherical motion and workspace of the human arm. The exoskeleton was designed to be portable in the sense that it could be transported geographically. It is a complete device allowing for motion in the shoulder, elbow, wrist and hand joints. The inverse kinematics was solved iteratively via the Damped Least Squares (DLS method. The electronic and computer system allowed for professional personnel to either change an individual joint or a combination of joints angles via the kinematic models. A ramp PI controller was established to provide a smooth response to simulate the passive therapy motion.

  18. Variable-speed, portable routing skate

    Science.gov (United States)

    Pesch, W. A.

    1967-01-01

    Lightweight, portable, variable-speed routing skate is used on heavy metal subassemblies which are impractical to move to a stationary machine. The assembly, consisting of the housing with rollers, router, and driving mechanism with transmission, weighs about forty pounds. Both speed and depth of cut are adjustable.

  19. Portable modular detection system

    Energy Technology Data Exchange (ETDEWEB)

    Brennan, James S [Rodeo, CA; Singh, Anup [Danville, CA; Throckmorton, Daniel J [Tracy, CA; Stamps, James F [Livermore, CA

    2009-10-13

    Disclosed herein are portable and modular detection devices and systems for detecting electromagnetic radiation, such as fluorescence, from an analyte which comprises at least one optical element removably attached to at least one alignment rail. Also disclosed are modular detection devices and systems having an integrated lock-in amplifier and spatial filter and assay methods using the portable and modular detection devices.

  20. Hearing performance in single-sided deaf cochlear implant users after upgrade to a single-unit speech processor.

    Science.gov (United States)

    Mertens, Griet; Hofkens, Anouk; Punte, Andrea Kleine; De Bodt, Marc; Van de Heyning, Paul

    2015-01-01

    Single-sided deaf (SSD) patients report multiple benefits after cochlear implantation (CI), such as tinnitus suppression, speech perception, and sound localization. The first single-unit speech processor, the RONDO, was launched recently. Both the RONDO and the well-known behind-the-ear (BTE) speech processor work on the same audio processor platform. However, in contrast to the BTE, the microphone placement on the RONDO is different. The aim of this study was to evaluate the hearing performances using the BTE speech processor versus using the single-unit speech processor. Subjective and objective outcomes in SSD CI patients with a BTE speech processor and a single-unit speech processor, with particular focus on spatial hearing, were compared. Ten adults with unilateral incapacitating tinnitus resulting from ipsilateral sensorineural deafness were enrolled in the study. The mean age at enrollment in the study was 56 (standard deviation, 13) years. The subjects were cochlear implanted at a mean age of 48 (standard deviation, 14) years and had on average 8 years' experience with their CI (range, 4-11 yr). At the first test interval (T0), testing was conducted using the subject's BTE speech processor, with which they were already familiar. Aided free-field audiometry, speech reception in noise, and sound localization testing were performed. Self-administered questionnaires on subjective evaluation consisted of HISQUI-NL, SSQ5, SHQ, and a Visual Analogue Scale to assess tinnitus loudness and disturbance. All 10 subjects were upgraded to the single-unit processor and retested after 28 days (T28) with the same fitting map. At T28, an additional single-unit questionnaire was administered to determine qualitative experiences and the effect of the position of the microphone on the new speech processor. Equal hearing outcomes were found between the single-unit speech processor: median PTA(single-unit) (0.5, 1, 2 kHz) = 40 (range, 33-48) dB HL; median Speech Reception

  1. A Comparison of the Single-sided (Gen II) and Double-sided (Gen I) Combat Arms Earplugs (CAE): Acoustic Properties, Human Performance, and User Acceptance

    Science.gov (United States)

    2012-12-01

    A Comparison of the Single-sided (Gen II) and Double-sided (Gen I) Combat Arms Earplugs (CAE): Acoustic Properties, Human Performance, and...and Double-sided (Gen I) Combat Arms Earplugs (CAE): Acoustic Properties, Human Performance, and User Acceptance Mary Binseel, Kara Cave, Joel...Double-sided (Gen I) Combat Arms Earplugs (CAE): Acoustic Properties, Human Performance, and User Acceptance 5a. CONTRACT NUMBER 5b. GRANT

  2. Simultaneous Labyrinthectomy and Cochlear Implantation for Patients with Single-Sided Ménière’s Disease and Profound Sensorineural Hearing Loss

    Directory of Open Access Journals (Sweden)

    G. Doobe

    2015-01-01

    Full Text Available Objective. To investigate the treatment outcome of a simultaneous labyrinthectomy and cochlear implantation in patients with single-sided Ménière’s disease and profound sensorineural hearing loss. Study Design. Prospective study. Method. Five patients with single-sided Ménière’s disease with active vertigo and functional deafness were included. In all cases, simultaneous cochlear implantation combined with labyrinthectomy surgery was performed. The outcome has been evaluated by the Dizziness Handicap Inventory (DHI and speech recognition. Results. The combined labyrinthectomy and cochlear implantation led in all patients to a highly significant reduction of dizziness up to a restitutio ad integrum. After activation of the cochlear implant and rehabilitation, a mean monosyllabic speech understanding of 69% at 65 dB was observed. Conclusion. For patients with single-sided Ménière’s disease and profound sensorineural hearing loss the simultaneous labyrinthectomy and cochlear implantation are efficient method for the treatment of vertigo as well as the rehabilitation of the auditory system.

  3. Portable beverage can cooler

    OpenAIRE

    Liang, Bo; Cheng, Yawen

    2010-01-01

    The reason to make a portable beverage can cooler is that all the other products in the market are heavy, expensive and all use electricity from the wall plugs. Also regular refrigerators take a long time to properly cool a beverage can. So it was decided to make a portable beverage can cooler which can keep a beer cool during outdoor activities like picnics, hiking etc. More so, since it will be portable it will be smaller and therefore cheaper. The main user group targeted with ...

  4. PORTABLE SOURCE OF RADIOACTIVITY

    Science.gov (United States)

    Goertz, R.C.; Ferguson, K.R.; Rylander, E.W.; Safranski, L.M.

    1959-06-16

    A portable source for radiogiaphy or radiotherapy is described. It consists of a Tl/sup 170/ or Co/sup 60/ source mounted in a rotatable tungsten alloy plug. The plug rotates within a brass body to positions of safety or exposure. Provision is made for reloading and carrying the device safely. (T.R.H.)

  5. Development and evaluation of a practical method to measure the Depth of Interaction function for a single side readout PET detector

    CERN Document Server

    Stringhini, G.; Ghezzi, A.; Stojkovic, A.; Paganoni, M.; Auffray, E.

    2016-01-01

    In small animal and organ dedicated PET scanners, the knowledge of depth of interaction (DOI) of the gamma ray along the main axis of the scintillator is a fundamental information in order to avoid parallax error and to achieve high performances in terms of spatial resolution. Recently we developed a new method to obtain the DOI function for a single side readout PET module, recirculating the scintillation light in the matrix by means of a mirror placed on top of the module. In a complete PET scanner, periodical DOI calibrations have to be performed to prevent time dependent miscalibrations and performance degradations. The current DOI calibration relies on a coincidence system between the module and an external scintillator to provide a priori the DOI information and it is clearly not feasible in a real system without unpractical disassemblies of the scanner. In this paper we develop instead a fast and precise calibration method based on uniform irradiation of the scintillators. Three irradiation modalities ...

  6. Single-side access, isotropic resolution and multispectral 3D photoacoustic imaging with rotate-translate scanning of ultrasonic detector array

    CERN Document Server

    Gateau, Jérôme; Chassot, Jean-Marie; Bossy, Emmanuel

    2015-01-01

    Photoacoustic imaging can achieve high-resolution three-dimensional visualization of optical absorbers at penetration depths ~ 1 cm in biological tissues by detecting optically-induced high ultrasound frequencies. Tomographic acquisition with ultrasound linear arrays offers an easy implementation of single-side access, parallelized and high-frequency detection, but usually comes with an image quality impaired by the directionality of the detectors. Indeed, a simple translation of the array perpendicularly to its median imaging plane is often used, but results both in a poor resolution in the translation direction and in strong limited view artifacts. To improve the spatial resolution and the visibility of complex structures while keeping a planar detection geometry, we introduce, in this paper, a novel rotate-translate scanning scheme, and investigate the performance of a scanner implemented at 15 MHz center frequency. The developed system achieved a quasi-isotropic uniform 3D resolution of ~170 um over a cub...

  7. Surgical treatment of choanal atresia with transnasal endoscopic approach with stentless single side-hinged flap technique: 5 year retrospective analysis

    Directory of Open Access Journals (Sweden)

    Carmelo Saraniti

    Full Text Available Abstract Introduction: Choanal atresia is a rare congenital malformation of the nasal cavity characterized by the complete obliteration of the posterior choanae. In 67% of cases choanal atresia is unilateral, affecting mainly (71% the right nasal cavity. In contrast to the unilateral form, bilateral choanal atresia is a life-threatening condition often associated with respiratory distress with feeding and intermittent cyanosis exacerbated by crying. Surgical treatment remains the only therapeutic option. Objective: To report our experience in the use of a transnasal endoscopic approach with stentless single side-hinged flap technique for the surgical management of choanal atresia. Methods: A 5 year retrospective analysis of surgical outcomes of 18 patients treated for choanal atresia with a transnasal technique employing a single side-hinged flap without stent placement. All subjects were assessed preoperatively with a nasal endoscopy and a Maxillofacial computed tomography scan. Results: Ten males and eight females with a mean age at the time of surgery of 20.05 ± 11.32 years, underwent surgery for choanal atresia. Fifteen subjects (83.33% had a bony while 3 (26.77% a mixed bony-membranous atretic plate. Two and sixteen cases suffered from bilateral and unilateral choanal atresia respectively. No intra- and/or early postoperative complications were observed. Between 2 and 3 months after surgery two cases (11.11% of partial restenosis were found. Only one of these presented a relapse of the nasal obstruction and was subsequently successfully repaired with a second endoscopic procedure. Conclusion: The surgical technique described follows the basic requirements of corrective surgery and allows good visualization, evaluation and treatment of the atretic plate and the posterior third of the septum, in order to create the new choanal opening. We believe that the use of a stent is not necessary, as recommended in case of other surgical techniques

  8. Portable neon purification system

    Energy Technology Data Exchange (ETDEWEB)

    Richardson, R.A.; Schmitt, R.L.

    1995-08-01

    This paper describes the principle design features of a portable neon purification system and the results of the system performance testing. Neon gas replaces air in the Ring Imaging Cherenkov detector without using vacuum, in experiment E781(SELEX) at Fermilab. The portable neon purification system purifies neon gas by, first purging air with CO{sub 2}, freezing the CO{sub 2}, then cryoadsorbing the remaining contaminants. The freezer removes carbon dioxide from a neon gas mixture down to a maximum concentration of 500 parts-per-million (ppm). The charcoal bed adsorber removes nitrogen from neon gas down to a maximum concentration of 100 ppm. The original RICH vessel was designed to hold vacuum but its photomultiplier tube plates were not.

  9. [Structural adjustment, cultural adjustment?].

    Science.gov (United States)

    Dujardin, B; Dujardin, M; Hermans, I

    2003-12-01

    Over the last two decades, multiple studies have been conducted and many articles published about Structural Adjustment Programmes (SAPs). These studies mainly describe the characteristics of SAPs and analyse their economic consequences as well as their effects upon a variety of sectors: health, education, agriculture and environment. However, very few focus on the sociological and cultural effects of SAPs. Following a summary of SAP's content and characteristics, the paper briefly discusses the historical course of SAPs and the different critiques which have been made. The cultural consequences of SAPs are introduced and are described on four different levels: political, community, familial, and individual. These levels are analysed through examples from the literature and individual testimonies from people in the Southern Hemisphere. The paper concludes that SAPs, alongside economic globalisation processes, are responsible for an acute breakdown of social and cultural structures in societies in the South. It should be a priority, not only to better understand the situation and its determining factors, but also to intervene and act with strategies that support and reinvest in the social and cultural sectors, which is vital in order to allow for individuals and communities in the South to strengthen their autonomy and identify.

  10. Portable electron beam weld chamber

    Science.gov (United States)

    Lewis, J. R.; Dimino, J. M.

    1972-01-01

    Development and characteristics of portable vacuum chamber for skate type electron beam welding are discussed. Construction and operational details of equipment are presented. Illustrations of equipment are provided.

  11. Portable Virtual Training Units

    Science.gov (United States)

    Malone, Reagan; Johnston, Alan

    2015-01-01

    The Mission Operations Lab initiated a project to design, develop, deliver, test, and validate a unique training system for astronaut and ground support personnel. In an effort to keep training costs low, virtual training units (VTUs) have been designed based on images of actual hardware and manipulated by a touch screen style interface for ground support personnel training. This project helped modernized the training system and materials by integrating them with mobile devices for training when operators or crew are unavailable to physically train in the facility. This project also tested the concept of a handheld remote device to control integrated trainers using International Space Station (ISS) training simulators as a platform. The portable VTU can interface with the full-sized VTU, allowing a trainer co-located with a trainee to remotely manipulate a VTU and evaluate a trainee's response. This project helped determine if it is useful, cost effective, and beneficial for the instructor to have a portable handheld device to control the behavior of the models during training. This project has advanced NASA Marshall Space Flight Center's (MSFC's) VTU capabilities with modern and relevant technology to support space flight training needs of today and tomorrow.

  12. Development and evaluation of a practical method to measure the Depth of Interaction function for a single side readout PET detector

    Science.gov (United States)

    Stringhini, G.; Pizzichemi, M.; Ghezzi, A.; Stojkovic, A.; Paganoni, M.; Auffray, E.

    2016-11-01

    In small animal and organ dedicated PET scanners, the knowledge of depth of interaction (DOI) of the gamma ray along the main axis of the scintillator is a fundamental information in order to avoid parallax error and to achieve high performances in terms of spatial resolution. Recently we developed a new method to obtain the DOI function for a single side readout PET module, recirculating the scintillation light in the matrix by means of a mirror placed on top of the module. In a complete PET scanner, periodical DOI calibrations have to be performed to prevent time dependent miscalibrations and performance degradations. The current DOI calibration relies on a coincidence system between the module and an external scintillator to provide a priori the DOI information and it is clearly not feasible in a real system without unpractical disassemblies of the scanner. In this paper we develop instead a fast and precise calibration method based on uniform irradiation of the scintillators. Three irradiation modalities are presented, in particular one where the source is placed on top of the module, one with the source placed on one side of the module and one that exploits the internal radioactivity of the scintillator. The three different procedures are evaluated and the calibration method is validated by comparing the information provided by the coincidence setup.

  13. Influence of Filler Alloy Composition and Process Parameters on the Intermetallic Layer Thickness in Single-Sided Cold Metal Transfer Welding of Aluminum-Steel Blanks

    Science.gov (United States)

    Silvayeh, Zahra; Vallant, Rudolf; Sommitsch, Christof; Götzinger, Bruno; Karner, Werner; Hartmann, Matthias

    2017-11-01

    Hybrid components made of aluminum alloys and high-strength steels are typically used in automotive lightweight applications. Dissimilar joining of these materials is quite challenging; however, it is mandatory in order to produce multimaterial car body structures. Since especially welding of tailored blanks is of utmost interest, single-sided Cold Metal Transfer butt welding of thin sheets of aluminum alloy EN AW 6014 T4 and galvanized dual-phase steel HCT 450 X + ZE 75/75 was experimentally investigated in this study. The influence of different filler alloy compositions and welding process parameters on the thickness of the intermetallic layer, which forms between the weld seam and the steel sheet, was studied. The microstructures of the weld seam and of the intermetallic layer were characterized using conventional optical light microscopy and scanning electron microscopy. The results reveal that increasing the heat input and decreasing the cooling intensity tend to increase the layer thickness. The silicon content of the filler alloy has the strongest influence on the thickness of the intermetallic layer, whereas the magnesium and scandium contents of the filler alloy influence the cracking tendency. The layer thickness is not uniform and shows spatial variations along the bonding interface. The thinnest intermetallic layer (mean thickness < 4 µm) is obtained using the silicon-rich filler Al-3Si-1Mn, but the layer is more than twice as thick when different low-silicon fillers are used.

  14. Audiological evaluation and self-assessed hearing problems in subjects with single-sided congenital external ear malformations and associated conductive hearing loss.

    Science.gov (United States)

    Priwin, Claudia; Jönsson, Radi; Magnusson, Lennart; Hultcrantz, Malou; Granström, Gösta

    2007-04-01

    Previously, unilateral hearing impairment (UHI) has been considered of little consequence. However, a recent meta-analysis of children with UHI displayed educational and behavioural problems and possible delays of speech and language development. Further, patients with UHI consequently report hearing difficulties. Our study investigated hearing function, possible inner ear protection, and self-assessed hearing problems in 57 subjects aged between 3-80 years with single-sided congenital ear malformations and conductive UHI. Pure-tone thresholds and speech recognition (quiet, noise) were measured, and all patients completed a self-assessment questionnaire. Pure-tone thresholds corresponding to sensorineural function did not significantly differ between the normal (air conduction) and affected ear (bone conduction). However, speech recognition in both quiet and in noise was normal on the non-affected side but significantly worse on the malformed side. A moderate to high degree of self-assessed hearing problems were reported. In conclusion, hearing function in the affected ear was found to be subnormal in terms of supra threshold signal processing. Furthermore, a high degree of hearing difficulty was reported. Therefore, active treatment, surgery, or hearing amplification, might be considered.

  15. Convexity Adjustments

    DEFF Research Database (Denmark)

    M. Gaspar, Raquel; Murgoci, Agatha

    2010-01-01

    A convexity adjustment (or convexity correction) in fixed income markets arises when one uses prices of standard (plain vanilla) products plus an adjustment to price nonstandard products. We explain the basic and appealing idea behind the use of convexity adjustments and focus on the situations o...

  16. Portability and networked learning environments

    NARCIS (Netherlands)

    Collis, Betty; de Diana, I.P.F.

    1994-01-01

    Abstract The portability of educational software is defined as the likelihood of software usage, with or without adaptation, in an educational environment different from that for which it was originally designed and produced. Barriers and research relevant to the portability of electronic learning

  17. Portable Medical Diagnosis Instrument

    Science.gov (United States)

    Straume, Tore (Inventor); Loftus, David J. (Inventor); Li, Jing (Inventor); Davis, Cristina E. (Inventor); Singh, Anup K. (Inventor); Coleman, Matthew A. (Inventor)

    2017-01-01

    A system that integrates several technologies into a single, portable medical diagnostic apparatus for analyzing a sample body fluid (liquid and/or gas): (1) a mechanism to capture airborne microdroplets and to separate the body fluid into a first fluid component (primarily gas) and a second fluid component (primarily liquid); (2) a volatilizer to convert a portion of the second fluid component into a third fluid component that is primarily a gas; (3) a functionalized nanostructure (NS) array configured to receive, identify, and estimate concentration of at least one constituent in the first and/or third fluid components; (4) a miniaturized differential mobility spectrometer (DMS) module; and (5) a biomarker sensor, to detect volatile and non-volatile molecules in a sample fluid, which may contain one or more components of blood, breath, perspiration, saliva, and urine.

  18. Clinical need for a Baha trial in patients with single-sided sensorineural deafness. Analysis of a Baha database of 196 patients.

    Science.gov (United States)

    Desmet, Jolien; Bouzegta, Rajae; Hofkens, Anouk; De Backer, Annemarie; Lambrechts, Peggy; Wouters, Kristien; Claes, Jozef; De Bodt, Marc; Van de Heyning, Paul

    2012-03-01

    A bone-anchored hearing aid (Baha) is used in patients with single-sided sensorineural deafness (SSD) to overcome the head shadow effect. Of all the patients with SSD, treated at our hospital, 196 patients used a Baha on trial between November 2001 and April 2010. The objective of this study is to evaluate what factors determine the decision of a SSD patient whether or not to opt for a Baha device following a Baha trial period. 196 patients with SSD were enrolled for a trial period of 2 weeks at the Antwerp University Hospital, a tertiary referral centre. 93% of these patients suffered from an acquired hearing loss. 44% of all the patients (87/196) chose to wear a Baha device after the trail period, either on an abutment or on a headband. The collected data were analysed to determine correlations between the decision of a patient following a Baha trial period on the one hand, and Fletcher Index ipsi- and contralaterally, bone conduction hearing thresholds at the better hearing ear, aetiology, age at the start of the trial period, duration of hearing loss at the start of the trial period and the type of device used during the trial period, on the other hand. Although 66% of all the patients (109/196) declined the Baha after a trial, reasons not to choose a Baha were diverse and no crucial factors could be found that determine the success of a Baha trial period. Lack of improvement concerning speech understanding in noise was the most important reason mentioned by patients who declined the Baha. The authors advocate that all patients, suffering from SSD, should be offered the opportunity to try a Baha device as no factors could be found that determine the decision of a patient following the trial period.

  19. Monolithic Composite “Pressure + Acceleration + Temperature + Infrared” Sensor Using a Versatile Single-Sided “SiN/Poly-Si/Al” Process-Module

    Directory of Open Access Journals (Sweden)

    Xinxin Li

    2013-01-01

    Full Text Available We report a newly developed design/fabrication module with low-cost single-sided “low-stress-silicon-nitride (LS-SiN/polysilicon (poly-Si/Al” process for monolithic integration of composite sensors for sensing-network-node applications. A front-side surface-/bulk-micromachining process on a conventional Si-substrate is developed, featuring a multifunctional SiN/poly-Si/Al layer design for diverse sensing functions. The first “pressure + acceleration + temperature + infrared” (PATIR composite sensor with the chip size of 2.5 mm × 2.5 mm is demonstrated. Systematic theoretical design and analysis methods are developed. The diverse sensing components include a piezoresistive absolute-pressure sensor (up to 700 kPa, with a sensitivity of 49 mV/MPa under 3.3 V supplied voltage, a piezoresistive accelerometer (±10 g, with a sensitivity of 66 μV/g under 3.3 V and a −3 dB bandwidth of 780 Hz, a thermoelectric infrared detector (with a responsivity of 45 V/W and detectivity of 3.6 × 107 cm·Hz1/2/W and a thermistor (−25–120 °C. This design/fabrication module concept enables a low-cost monolithically-integrated “multifunctional-library” technique. It can be utilized as a customizable tool for versatile application-specific requirements, which is very useful for small-size, low-cost, large-scale sensing-network node developments.

  20. A Trusted Portable Computing Device

    Science.gov (United States)

    Ming-wei, Fang; Jun-jun, Wu; Peng-fei, Yu; Xin-fang, Zhang

    A trusted portable computing device and its security mechanism were presented to solve the security issues, such as the attack of virus and Trojan horse, the lost and stolen of storage device, in mobile office. It used smart card to build a trusted portable security base, virtualization to create a secure virtual execution environment, two-factor authentication mechanism to identify legitimate users, and dynamic encryption to protect data privacy. The security environment described in this paper is characteristic of portability, security and reliability. It can meet the security requirement of mobile office.

  1. PAT portable appliance testing

    CERN Document Server

    2011-01-01

    The Electricity at Work Regulations 1989 require any electrical system to be constructed, maintained and used in such a manner as to prevent danger. This means that inspection and testing of systems, including portable appliances, is needed in order to determine if maintenance is required.This book explains in clear language what needs to be done and includes expert advice on legislation as well as actual testing. The book contains an appendix providing the electrical fundamentals needed by non-specialists and also has sample questions (with answers) for the C&G 2377 exam that anyone who conducts this work is required to take by law.It is an affordable and handy reference for electricians who administer PAT. It is also an ideal refesher and revision guide for the non-specialist, such as maintenance staff, caretakers and charity shop volunteers who carry out these tasks part-time, alongside their many other duties.Brian Scaddan, I Eng, MIET, is a consultant for and an Honorary Member of City & Guilds. ...

  2. Portable graphics system. [CGS

    Energy Technology Data Exchange (ETDEWEB)

    Kellner, R.G.; Reed, T.N.; Solem, A.V.

    1978-01-01

    LASL implemented a graphics system designed to support all graphics devices in all operating environments at LASL. This system, Common Graphics System (CGS), supports level one of the graphics standard proposed by the ACM/SIGGRAPH Graphics Standards Planning Committee. To make the system immediately available to existing application programs, the older LASL high-level graphics routines were implemented, use of the system primitives; device independence and portability with a minimum of change were achieved. CGS is now available in six operating environments of two different word lengths and supports four graphics devices. It supports a pseudodevice file that may be postprocessed and edited for a particular graphics device, or it can generate device-dependent graphics output directly. It supports multiple display surfaces for multiple graphics devices simultaneously. The system is structured to isolate operating system dependencies and graphics device dependencies. Abstract concepts of graphics I/O and operating system functions were implemented. The device drivers may be called by the postprocessor or used directly by the applications program. Multiple devices may be loaded simultaneously or overlaid. The clean interfaces and parallel structures make it easy to support new graphics devices. The system is written in the RATFOR (Rational FORTRAN) language, which supports control structure statements and macro expansion. The output of the RATFOR preprocessor is ANSI FORTRAN. The system is maintained as a single source program from which each version can be extracted automatically. The graphics system is thus the same in all operating environments.

  3. Portable Data Acquisition System Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Armstrong researchers have developed a portable data acquisition system (PDAT) that can be easily transported and set up at remote locations to display and archive...

  4. Portable Decontamination and Sterilization System

    National Research Council Canada - National Science Library

    Bell, William; Smerjac, Suzanne; Smith, Bryan

    2004-01-01

    TDA Research, Inc., (TDA) is developing a portable system to generate chlorine dioxide, which can be used for biodecontamination of small items and to sterilize medical and dental instruments in austere environments...

  5. 49 CFR 176.137 - Portable magazine.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Portable magazine. 176.137 Section 176.137... Requirements for Class 1 (Explosive) Materials Stowage § 176.137 Portable magazine. (a) Each portable magazine... wood, a portable magazine must be framed of nominal 5 cm × 10 cm (2×4 inch) lumber, and sheathed with...

  6. 33 CFR 149.410 - Where must portable and semi-portable fire extinguishers be located?

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Where must portable and semi-portable fire extinguishers be located? 149.410 Section 149.410 Navigation and Navigable Waters COAST GUARD... and semi-portable fire extinguishers be located? All portable and semi-portable fire extinguishers...

  7. Portable Source Identification Device

    Energy Technology Data Exchange (ETDEWEB)

    Andersen, Eric S.; Samuel, Todd J.; Gervais, Kevin L.

    2005-08-01

    U.S. Customs and Border Protection (CBP) is the primary enforcement agency protecting the nation’s ports of entry. CBP is enhancing its capability to interdict the illicit import of nuclear and radiological materials and devices that may be used by terrorists. Pacific Northwest National Laboratory (PNNL) is providing scientific and technical support to CBP in their goal to enable rapid deployment of nuclear and radiation detection systems at U. S. ports of entry to monitor 100% of the incoming international traffic and cargo while not adversely impacting the operations or throughput of the ports. As the deployment of radiation detection systems proceeds, there is a need to adapt the baseline radiation portal monitor (RPM) system technology to operations at these diverse ports of entry. When screening produces an alarm in the primary inspection RPM, the alarming vehicle is removed from the flow of commerce and the alarm is typically confirmed in a secondary inspection RPM. The portable source identification device (PSID) is a radiation sensor panel (RSP), based on thallium-doped sodium iodide (NaI(Tl)) scintillation detector and gamma spectroscopic analysis hardware and software, mounted on a scissor lift on a small truck. The lift supports a box containing a commercial off-the-shelf (COTS) sodium iodide detector that provides real-time isotopic identification, including neutron detectors to interdict Weapons of Mass Destruction (WMD) and radiation dispersion devices (RDD). The scissor lift will lower the detectors to within a foot off the ground and raise them to approximately 24 feet in the air, allowing a wide vertical scanning range.

  8. Portable source identification device

    Science.gov (United States)

    Andersen, Eric S.; Samuel, Todd J.; Gervais, Kevin L.

    2005-05-01

    U.S. Customs and Border Protection (CBP) is the primary enforcement agency protecting the nation"s ports of entry. CBP is enhancing its capability to interdict the illicit import of nuclear and radiological materials and devices that may be used by terrorists. Pacific Northwest National Laboratory (PNNL) is providing scientific and technical support to CBP in their goal to enable rapid deployment of nuclear and radiation detection systems at U. S. ports of entry to monitor 100% of the incoming international traffic and cargo while not adversely impacting the operations or throughput of the ports. As the deployment of radiation detection systems proceeds, there is a need to adapt the baseline radiation portal monitor (RPM) system technology to operations at these diverse ports of entry. When screening produces an alarm in the primary inspection RPM, the alarming vehicle is removed from the flow of commerce and the alarm is typically confirmed in a secondary inspection RPM. The portable source identification device (PSID) is a radiation sensor panel (RSP), based on thallium-doped sodium iodide (NaI(Tl)) scintillation detector and gamma spectroscopic analysis hardware and software, mounted on a scissor lift on a small truck. The lift supports a box containing a commercial off-the-shelf (COTS) sodium iodide detector that provides real-time isotopic identification, including neutron detectors to interdict Weapons of Mass Destruction (WMD) and radiation dispersion devices (RDD). The scissor lift will lower the detectors to within a foot off the ground and raise them to approximately 24 feet (7.3 m) in the air, allowing a wide vertical scanning range.

  9. Chiropractic Adjustment

    Science.gov (United States)

    ... Results Chiropractic adjustment can be effective in treating low back pain, although much of the research done shows only a modest benefit — similar to the results of more conventional treatments. Some studies suggest that spinal manipulation also may ...

  10. Portable Battery Charger Berbasis Sel Surya

    Directory of Open Access Journals (Sweden)

    Budhi Anto

    2014-04-01

    Full Text Available A type of solar battery charger is introduced in this paper. This equipment functions as a medium size rechargeable battery that is needed to move culinary merchants and coastal fishermen living in area which is not supplied by electrical networks. The equipment consists of solar module mounted onto portable mechanical construction, a 12-V 7.5-Ah lead acid battery and charge controller. Solar module charges the battery through charge controller and then the battery can be discharged to power on electric lamps for lightening culinary wagon or fisherman’s boat at night. Charge controller charges the battery with float charging which is implemented by maintaining 13.5 Volt between battery terminals and limiting the charging current to 1.5 Amperes. Charge controller circuit is based on adjustable linear voltage regulator LM338. The battery is of sealed lead acid type. This type of battery is maintenance free and more hygiene than other types of lead acid battery. The field experiment of charging the baterry of 50% residual capacity from 8 am to 4 pm under sunny weather shows that the solar module has charged the battery to its full capacity under battery safe charging conditions.Keywords: portable solar battery charger, float charging, LM338

  11. [Portable instrument for arteriosclerosis assessment].

    Science.gov (United States)

    Cao, Shuai; Chen, Xiang

    2014-01-01

    A portable instrument for arteriosclerosis assessment containing sensor module, acquisition board and embedded module was developed for home care in this paper. The sensor module consists of one ECG module and three pulse wave extraction modules, synchronously acquiring human ECG and pulse wave signal of carotid, radial, and dorsal, respectively. The acquisition board converts the sensor module's analog output signals into digital signals and transmits them to the embedded module. The embedded module realizes the functions including signal display, storage and the calculation and output of pulse wave velocity. The structure of the proposed portable instrument is simple, easy to use, and easy to expand. Small size, low cost, and low power consumption are also the advantages of this device. Experimental results demonstrated that the proposed portable instrument for arteriosclerosis assessment has high accuracy, good repeatability and can assess the degree of atherosclerosis appropriately.

  12. Data portability among online platforms

    Directory of Open Access Journals (Sweden)

    Barbara Engels

    2016-06-01

    Full Text Available This paper examines the competition effects of data portability among online platforms, providing policy recommendations for the preservation of innovative, undistorted competitive markets. Based on a platform-data model, it is illustrated how users, data and the products of a platform are related. Platform markets which entail an especially high risk of market power abuse are determined. It is concluded that the right to data portability as in the EU’s General Data Protection Regulation has to be interpreted in a nuanced fashion in order to avoid adverse effects on competition and innovation.

  13. Comparison of the benefits of cochlear implantation versus contra-lateral routing of signal hearing aids in adult patients with single-sided deafness: study protocol for a prospective within-subject longitudinal trial.

    Science.gov (United States)

    Kitterick, Pádraig T; O'Donoghue, Gerard M; Edmondson-Jones, Mark; Marshall, Andrew; Jeffs, Ellen; Craddock, Louise; Riley, Alison; Green, Kevin; O'Driscoll, Martin; Jiang, Dan; Nunn, Terry; Saeed, Shakeel; Aleksy, Wanda; Seeber, Bernhard U

    2014-01-01

    Individuals with a unilateral severe-to-profound hearing loss, or single-sided deafness, report difficulty with listening in many everyday situations despite having access to well-preserved acoustic hearing in one ear. The standard of care for single-sided deafness available on the UK National Health Service is a contra-lateral routing of signals hearing aid which transfers sounds from the impaired ear to the non-impaired ear. This hearing aid has been found to improve speech understanding in noise when the signal-to-noise ratio is more favourable at the impaired ear than the non-impaired ear. However, the indiscriminate routing of signals to a single ear can have detrimental effects when interfering sounds are located on the side of the impaired ear. Recent published evidence has suggested that cochlear implantation in individuals with a single-sided deafness can restore access to the binaural cues which underpin the ability to localise sounds and segregate speech from other interfering sounds. The current trial was designed to assess the efficacy of cochlear implantation compared to a contra-lateral routing of signals hearing aid in restoring binaural hearing in adults with acquired single-sided deafness. Patients are assessed at baseline and after receiving a contra-lateral routing of signals hearing aid. A cochlear implant is then provided to those patients who do not receive sufficient benefit from the hearing aid. This within-subject longitudinal design reflects the expected care pathway should cochlear implantation be provided for single-sided deafness on the UK National Health Service. The primary endpoints are measures of binaural hearing at baseline, after provision of a contra-lateral routing of signals hearing aid, and after cochlear implantation. Binaural hearing is assessed in terms of the accuracy with which sounds are localised and speech is perceived in background noise. The trial is also designed to measure the impact of the interventions on

  14. Comparison of the benefits of cochlear implantation versus contra-lateral routing of signal hearing aids in adult patients with single-sided deafness: study protocol for a prospective within-subject longitudinal trial

    Science.gov (United States)

    2014-01-01

    Background Individuals with a unilateral severe-to-profound hearing loss, or single-sided deafness, report difficulty with listening in many everyday situations despite having access to well-preserved acoustic hearing in one ear. The standard of care for single-sided deafness available on the UK National Health Service is a contra-lateral routing of signals hearing aid which transfers sounds from the impaired ear to the non-impaired ear. This hearing aid has been found to improve speech understanding in noise when the signal-to-noise ratio is more favourable at the impaired ear than the non-impaired ear. However, the indiscriminate routing of signals to a single ear can have detrimental effects when interfering sounds are located on the side of the impaired ear. Recent published evidence has suggested that cochlear implantation in individuals with a single-sided deafness can restore access to the binaural cues which underpin the ability to localise sounds and segregate speech from other interfering sounds. Methods/Design The current trial was designed to assess the efficacy of cochlear implantation compared to a contra-lateral routing of signals hearing aid in restoring binaural hearing in adults with acquired single-sided deafness. Patients are assessed at baseline and after receiving a contra-lateral routing of signals hearing aid. A cochlear implant is then provided to those patients who do not receive sufficient benefit from the hearing aid. This within-subject longitudinal design reflects the expected care pathway should cochlear implantation be provided for single-sided deafness on the UK National Health Service. The primary endpoints are measures of binaural hearing at baseline, after provision of a contra-lateral routing of signals hearing aid, and after cochlear implantation. Binaural hearing is assessed in terms of the accuracy with which sounds are localised and speech is perceived in background noise. The trial is also designed to measure the impact of

  15. Salary adjustments

    CERN Multimedia

    HR Department

    2008-01-01

    In accordance with decisions taken by the Finance Committee and Council in December 2007, salaries are adjusted with effect from 1 January 2008. Scale of basic salaries and scale of stipends paid to fellows (Annex R A 5 and R A 6 respectively): increased by 0.71% with effect from 1 January 2008. As a result of the stability of the Geneva consumer price index, following elements do not increase: a) Family Allowance, Child Allowance and Infant Allowance (Annex R A 3). b) Reimbursement of education fees: maximum amounts of reimbursement (Annex R A 4.01) for the academic year 2007/2008. Related adjustments will be implemented, wherever applicable, to Paid Associates and Students. As in the past, the actual percentage increase of each salary position may vary, due to the application of a constant step value and the rounding effects. Human Resources Department Tel. 73566

  16. Salary adjustments

    CERN Multimedia

    HR Department

    2008-01-01

    In accordance with decisions taken by the Finance Committee and Council in December 2007, salaries are adjusted with effect from 1 January 2008. Scale of basic salaries and scale of stipends paid to fellows (Annex R A 5 and R A 6 respectively): increased by 0.71% with effect from 1 January 2008. As a result of the stability of the Geneva consumer price index, the following elements do not increase: a)\tFamily Allowance, Child Allowance and Infant Allowance (Annex R A 3); b)\tReimbursement of education fees: maximum amounts of reimbursement (Annex R A 4.01) for the academic year 2007/2008. Related adjustments will be applied, wherever applicable, to Paid Associates and Students. As in the past, the actual percentage increase of each salary position may vary, due to the application of a constant step value and rounding effects. Human Resources Department Tel. 73566

  17. Portable Hybrid Powered Water Filtration Device

    National Research Council Canada - National Science Library

    Maria Lourdes V. Balansay; Mary Rose Q. Añonuevo; Rexzel M. Cuenca; Ricmart V. Garbin

    2015-01-01

    .... The design of the portable hybrid powered water filtration device shows that the project has more advanced features such as portability and the power supply used such as photovoltaic module solar...

  18. A portable luminescence dating instrument

    DEFF Research Database (Denmark)

    Kook, M.H.; Murray, A.S.; Lapp, Torben

    2011-01-01

    We describe a portable luminescence reader suitable for use in remote localities in the field. The instrument weighs about 8kg and is based around a 30mm bialkali photomultiplier detecting signals through a glass filter centered on 340nm. Stimulation is by 470nm blue LEDs (24W in total) operating...

  19. 48 CFR 1837.170 - Pension portability.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Pension portability. 1837... ADMINISTRATION SPECIAL CATEGORIES OF CONTRACTING SERVICE CONTRACTING Service Contracts-General 1837.170 Pension portability. (a) It is NASA's policy not to require pension portability in service contracts. However, pension...

  20. 46 CFR 169.567 - Portable extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Portable extinguishers. 169.567 Section 169.567 Shipping... Lifesaving and Firefighting Equipment Firefighting Equipment § 169.567 Portable extinguishers. (a) The minimum number of portable fire extinguishers required on each vessel is determined by the Officer in...

  1. Portable EDITOR (PEDITOR): A portable image processing system. [satellite images

    Science.gov (United States)

    Angelici, G.; Slye, R.; Ozga, M.; Ritter, P.

    1986-01-01

    The PEDITOR image processing system was created to be readily transferable from one type of computer system to another. While nearly identical in function and operation to its predecessor, EDITOR, PEDITOR employs additional techniques which greatly enhance its portability. These cover system structure and processing. In order to confirm the portability of the software system, two different types of computer systems running greatly differing operating systems were used as target machines. A DEC-20 computer running the TOPS-20 operating system and using a Pascal Compiler was utilized for initial code development. The remaining programmers used a Motorola Corporation 68000-based Forward Technology FT-3000 supermicrocomputer running the UNIX-based XENIX operating system and using the Silicon Valley Software Pascal compiler and the XENIX C compiler for their initial code development.

  2. [Advances of portable electrocardiogram monitor design].

    Science.gov (United States)

    Ding, Shenping; Wang, Yinghai; Wu, Weirong; Deng, Lingli; Lu, Jidong

    2014-06-01

    Portable electrocardiogram monitor is an important equipment in the clinical diagnosis of cardiovascular diseases due to its portable, real-time features. It has a broad application and development prospects in China. In the present review, previous researches on the portable electrocardiogram monitors have been arranged, analyzed and summarized. According to the characteristics of the electrocardiogram (ECG), this paper discusses the ergonomic design of the portable electrocardiogram monitor, including hardware and software. The circuit components and software modules were parsed from the ECG features and system functions. Finally, the development trend and reference are provided for the portable electrocardiogram monitors and for the subsequent research and product design.

  3. Portable sensor for hazardous waste

    Energy Technology Data Exchange (ETDEWEB)

    Piper, L.G.; Fraser, M.E.; Davis, S.J. [Physical Sciences Inc., Andover, MA (United States)

    1995-10-01

    We are beginning the second phase of a three and a half year program designed to develop a portable monitor for sensitive hazardous waste detection. The ultimate goal of the program is to develop our concept to the prototype instrument level. Our monitor will be a compact, portable instrument that will allow real-time, in situ, monitoring of hazardous wastes. This instrument will be able to provide the means for rapid field screening of hazardous waste sites to map the areas of greatest contamination. Remediation efforts can then focus on these areas. Further, our instrument can show whether cleanup technologies are successful at reducing hazardous materials concentrations below regulated levels, and will provide feedback to allow changes in remediation operations, if necessary, to enhance their efficacy.

  4. Portable High Voltage Impulse Generator

    Directory of Open Access Journals (Sweden)

    S. Gómez

    2011-06-01

    Full Text Available This paper presents a portable high voltage impulse generator which was designed and built with insulation up to 20 kV. This design was based on previous work in which simulation software for standard waves was developed. Commercial components and low-cost components were used in this work; however, these particular elements are not generally used for high voltage applications. The impulse generators used in industry and laboratories are usually expensive; they are built to withstand extra high voltage and they are big, making them impossible to transport. The proposed generator is portable, thereby allowing tests to be made on devices that cannot be moved from their location. The results obtained with the proposed impulse generator were satisfactory in terms of time and waveforms compared to other commercial impulse generators and the standard impulse wave simulator.

  5. Portable technologies at the museum

    DEFF Research Database (Denmark)

    Svabo, Connie

    2011-01-01

    A topic of interest in contemporary museum studies is how digital technologies contribute to museum visitor experiences. Building on insights from media and technology studies that new media should be understood for how they overlap with old media, the article reports an ethnographic study....... This is shown by drawing on the concept of mediation as it is developed by philosopher Michel Serres and philosopher of technology Bruno Latour. The article is based on the Ph.D. thesis entitled “Portable Objects at the Museum”, defended at Roskilde University on 22 September 2010....... of the intersections between the exhibition at a modern museum of natural history and three portable technologies – one of which is digital. Mobile phone cameras, exercise pamphlets and dress-up costumes link visitors with an exhibition, but they simultaneously shape this relation in their own specific directions...

  6. Microprocessor controlled portable TLD system

    Science.gov (United States)

    Apathy, I.; Deme, S.; Feher, I.

    1996-01-01

    An up-to-date microprocessor controlled thermoluminescence dosemeter (TLD) system for environmental and space dose measurements has been developed. The earlier version of the portable TLD system, Pille, was successfully used on Soviet orbital stations as well as on the US Space Shuttle, and for environmental monitoring. The new portable TLD system, Pille'95, consists of a reader and TL bulb dosemeters, and each dosemeter is provided with an EEPROM chip for automatic identification. The glow curve data are digitised and analysed by the program of the reader. The measured data and the identification number appear on the LED display of the reader. Up to several thousand measured data together with the glow curves can be stored on a removable flash memory card. The whole system is supplied either from built-in rechargeable batteries or from the mains of the space station.

  7. A Portable Passive Physiotherapeutic Exoskeleton

    OpenAIRE

    Naidu, Dasheek; Stopforth, Riaan; Bright, Glen; Davrajh, Shaniel

    2012-01-01

    The public healthcare system in South Africa is in need of urgent attention in no small part because there has been an escalation in the number of stroke victims which could be due to the increase in hypertension in this urbanizing society. There is a growing need for physiotherapists and occupational therapists in the country, which is further hindered by the division between urban and rural areas. A possible solution is a portable passive physiotherapeutic exoskeleton device. The exoskeleto...

  8. PORTABLE ACOUSTIC MONITORING PACKAGE (PAMP)

    Energy Technology Data Exchange (ETDEWEB)

    John L. Loth; Gary J. Morris; George M. Palmer; Richard Guiler; Patrick Browning

    2004-07-20

    The Portable Acoustic Monitoring Package (PAMP) has been designed to record and monitor the acoustic signal in natural gas transmission lines. In particular the three acoustic signals associated with a line leak. The system is portable ({approx}30 lbs) and is designed for line pressures up to 1000 psi. It has become apparent that cataloging of the various background acoustic signals in natural gas transmission line is very important if a system to identify leak signals is to be developed. The low-pressure (0-200 psig) laboratory test phase has been completed and a number of field trials have been conducted. Before the cataloging phase could begin, a few problems identified in field trials identified had to be corrected such as: (1) Decreased microphone sensitivity at line pressures above 250 psig. (2) The inability to deal with large data sets collected when cataloging the variety of signals in a transmission line. (3) The lack of an available online acoustic calibration system. These problems have been solved and the WVU PAMP is now fully functional over the entire pressure range found in the Natural Gas transmission lines in this region. Field portability and reliability have been greatly improved. Data collection and storage have also improved to the point were the full acoustic spectrum of acoustic signals can be accurately cataloged, recorded and described.

  9. Software Complexity Threatens Performance Portability

    Energy Technology Data Exchange (ETDEWEB)

    Gamblin, T. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2015-09-11

    Modern HPC software packages are rarely self-contained. They depend on a large number of external libraries, and many spend large fractions of their runtime in external subroutines. Performance portability depends not only on the effort of application teams, but also on the availability of well-tuned libraries. At most sites, the burden of maintaining libraries is shared by code teams and facilities. Facilities typically provide well-tuned default versions, but code teams frequently build with bleeding-edge compilers to achieve high performance. For this reason, HPC has no “standard” software stack, unlike other domains where performance is not critical. Incompatibilities among compilers and software versions force application teams and facility staff to re-build custom versions of libraries for each new toolchain. Because the number of potential configurations is combinatorial, and because HPC software is notoriously difficult to port to new machines [3, 7, 8], the tuning effort required to support and maintain performance-portable libraries outstrips the available manpower at most sites. Software complexity is a growing obstacle to performance portability for HPC.

  10. Scheme for secure swapping two unknown states of a photonic qubit and an electron-spin qubit using simultaneous quantum transmission and teleportation via quantum dots inside single-sided optical cavities

    Energy Technology Data Exchange (ETDEWEB)

    Heo, Jino [College of Electrical and Computer Engineering, Chungbuk National University, Chungdae-ro 1, Seowon-Gu, Cheongju (Korea, Republic of); Kang, Min-Sung [Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul, 136-791 (Korea, Republic of); Hong, Chang-Ho [National Security Research Institute, P.O.Box 1, Yuseong, Daejeon, 34188 (Korea, Republic of); Choi, Seong-Gon [College of Electrical and Computer Engineering, Chungbuk National University, Chungdae-ro 1, Seowon-Gu, Cheongju (Korea, Republic of); Hong, Jong-Phil, E-mail: jongph@cbnu.ac.kr [College of Electrical and Computer Engineering, Chungbuk National University, Chungdae-ro 1, Seowon-Gu, Cheongju (Korea, Republic of)

    2017-06-15

    We propose a scheme for swapping two unknown states of a photon and electron spin confined to a charged quantum dot (QD) between two users by transferring a single photon. This scheme simultaneously transfers and teleports an unknown state (electron spin) between two users. For this bidirectional quantum communication, we utilize the interactions between a photonic and an electron-spin qubits of a QD located inside a single-sided optical cavity. Thus, our proposal using QD-cavity systems can obtain a certain success probability with high fidelity. Furthermore, compared to a previous scheme using cross-Kerr nonlinearities and homodyne detections, our scheme (using QD-cavity systems) can improve the feasibility under the decoherence effect in practice. - Highlights: • Design of Simultaneous quantum transmission and teleportation scheme via quantum dots and cavities. • We have developed the experimental feasibility of this scheme compared with the existing scheme. • Analysis of some benefits when our scheme is experimentally implemented using quantum dots and single-sided cavities.

  11. Portable receiver for radar detection

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Christopher D.; Kotter, Dale K.

    2008-10-14

    Various embodiments are described relating to a portable antenna-equipped device for multi-band radar detection. The detection device includes a plurality of antennas on a flexible substrate, a detection-and-control circuit, an indicator and a power source. The antenna may include one or more planar lithographic antennas that may be fabricated on a thin-film substrate. Each antenna may be tuned to a different selection frequency or band. The antennas may include a bolometer for radar detection. Each antenna may include a frequency selective surface for tuning to the selection frequency.

  12. Portability Support for High Performance Computing

    Science.gov (United States)

    Cheng, Doreen Y.; Cooper, D. M. (Technical Monitor)

    1994-01-01

    While a large number of tools have been developed to support application portability, high performance application developers often prefer to use vendor-provided, non-portable programming interfaces. This phenomena indicates the mismatch between user priorities and tool capabilities. This paper summarizes the results of a user survey and a developer survey. The user survey has revealed the user priorities and resulted in three criteria for evaluating tool support for portability. The developer survey has resulted in the evaluation of portability support and indicated the possibilities and difficulties of improvements.

  13. Portable humanitarian mine detector overview

    Science.gov (United States)

    Allsopp, David J.; Dibsdall, Ian M.

    2002-08-01

    This paper will present an overview and early results of the QinetiQ Portable Humanitarian Mine Detector project, funded by the UK Treasury Capital Modernization Fund. The project aims to develop a prototype multi-sensor man-portable detector for humanitarian demining, drawing on experience from work for UK MoD. The project runs from July 2000 to October 2002. The project team have visited mined areas and worked closely with a number of demining organizations and a manufacturer of metal detectors used in the field. The primary objective is to reduce the number of false alarms resulting from metallic ground clutter. An analysis of such clutter items found during actual demining has shown a large proportion to be very small when compared with anti-personnel mines. The planned system integrates: a lightweight multi-element pseudo-random-code ground penetrating radar array; a pulse induction metal detector and a capacitive sensor. Data from the GPR array and metal detector are fused to provide a simple audio-visual operator interface. The capacitive sensor provides information to aid processing of the radar responses and to provide feedback to the operator of the position of the sensors above the ground. At the time of presentation the project should be in the final stages of build, prior to tests and field trials, which QinetiQ hope to carry out under the International Test and Evaluation Project (ITEP) banner.

  14. Portable water quality monitoring system

    Science.gov (United States)

    Nizar, N. B.; Ong, N. R.; Aziz, M. H. A.; Alcain, J. B.; Haimi, W. M. W. N.; Sauli, Z.

    2017-09-01

    Portable water quality monitoring system was a developed system that tested varied samples of water by using different sensors and provided the specific readings to the user via short message service (SMS) based on the conditions of the water itself. In this water quality monitoring system, the processing part was based on a microcontroller instead of Lead and Copper Rule (LCR) machines to receive the results. By using four main sensors, this system obtained the readings based on the detection of the sensors, respectively. Therefore, users can receive the readings through SMS because there was a connection between Arduino Uno and GSM Module. This system was designed to be portable so that it would be convenient for users to carry it anywhere and everywhere they wanted to since the processor used is smaller in size compared to the LCR machines. It was also developed to ease the user to monitor and control the water quality. However, the ranges of the sensors' detection still a limitation in this study.

  15. Portable Diagnostics and Rapid Germination

    Energy Technology Data Exchange (ETDEWEB)

    Dunn, Zachary Spencer [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2016-12-01

    In the Bioenergy and Defense Department of Sandia National Laboratories, characterization of the BaDx (Bacillus anthracis diagnostic cartridge) was performed and rapid germination chemistry was investigated. BaDx was tested with complex sample matrixes inoculated with Bacillus anthracis, and the trials proved that BaDx will detect Bacillus anthracis in a variety of the medium, such as dirt, serum, blood, milk, and horse fluids. The dimensions of the device were altered to accommodate an E. coli or Listeria lateral flow immunoassay, and using a laser printer, BaDx devices were manufactured to identify E. coli and Listeria. Initial testing with E. coli versions of BaDx indicate that the device will be viable as a portable diagnostic cartridge. The device would be more effective with faster bacteria germination; hence studies were performed the use of rapid germination chemistry. Trials with calcium dipicolinic acid displayed increased cell germination, as shown by control studies using a microplate reader. Upon lyophilization the rapid germination chemistry failed to change growth patterns, indicating that the calcium dipicolinic acid was not solubilized under the conditions tested. Although incompatible with the portable diagnostic device, the experiments proved that the rapid germination chemistry was effective in increasing cell germination.

  16. The normally expressed kappa immunoglobulin light chain gene repertoire and somatic mutations studied by single-sided specific polymerase chain reaction (PCR); frequent occurrence of features often assigned to autoimmunity

    DEFF Research Database (Denmark)

    Juul, L; Hougs, L; Andersen, V

    1997-01-01

    The expressed human kappa light chain gene repertoire utilized by healthy individuals was studied by two different single-sided specific PCR techniques to avoid bias for certain V genes. A total of 103 rearranged kappa sequences from peripheral blood mononuclear cells from healthy individuals were...... cloned from cDNA and assigned to the Vkappa and Jkappa germ-line genes with the closest overall homology. The use of cDNA rather than genomic DNA focused the analysis on activated B cells rich in mRNA. Accordingly, the sequences represented the applied repertoire and almost all were somatically mutated......% and 21% of the sequences, respectively. Extended CDR3s more than nine residues in length were found in 18% of the sequences, and in 71% of cases this was due to insertion of an extra proline residue. This proline was usually explained from the germ-line sequences involved. These results are in good...

  17. 46 CFR 25.30-10 - Hand-portable fire extinguishers and semi-portable fire-extinguishing systems.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Hand-portable fire extinguishers and semi-portable fire... UNINSPECTED VESSELS REQUIREMENTS Fire Extinguishing Equipment § 25.30-10 Hand-portable fire extinguishers and semi-portable fire-extinguishing systems. (a) Hand portable fire extinguishers and semiportable fire...

  18. Highly sensitive detection of silybin based on adsorptive stripping analysis at single-sided heated screen-printed carbon electrodes modified with multi-walled carbon nanotubes with direct current heating.

    Science.gov (United States)

    Wu, Shao-Hua; Nie, Fa-Hui; Chen, Qi-Zhen; Sun, Jian-Jun

    2011-02-14

    A new disposable multi-walled carbon nanotubes modified single-sided heated screen-printed carbon electrode (MWNT/ss-HSPCE) was fabricated. The electrochemical behavior of silybin was investigated by cyclic voltammetry and the probable electrode reaction mechanism was proposed. A simple and cheap direct current heating supplier was used to heating the electrode for adsorptive accumulation of silybin. The square wave voltammetric stripping peak current of silybin at MWNT/ss-HSPCE with an elevated electrode temperature of 50°C only during accumulation step was dramatically improved compared with that at bare single-sided heated screen-printed carbon electrode (ss-HSPCE) without heating. This enhancement was mainly contributed to the combination of the advantages of multi-walled carbon nanotubes and electrically heated electrodes. Under optimum conditions, two detection linear ranges of silybin were from 1.0×10(-9) to 1.0×10(-7) M and 3.0×10(-7) to 1.0×10(-6) M. A detection limit of 5.0×10(-10) M could be obtained (S/N=3), which was more than two magnitudes lower than that at bare ss-HSPCE without heating. To the best of our knowledge, this was also at least two magnitudes lower than any others for electrochemical detection of silybin in the literature. Finally, the method was successfully applied to the determination of silybin in pharmaceutical tablets. Copyright © 2010 Elsevier B.V. All rights reserved.

  19. 46 CFR 129.450 - Portable lighting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Portable lighting. 129.450 Section 129.450 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS ELECTRICAL INSTALLATIONS Lighting Systems § 129.450 Portable lighting. Each vessel must be equipped with at least two...

  20. Portable direct methanol fuel cell systems

    Science.gov (United States)

    Narayanan, S. R.; Valdez, T. I.

    2002-01-01

    This article includes discussion of the specific power and power density requirements for various portable system applications, the status of stack technology, progress in the implementation of balance-of-plant designs, and a summary of the characteristics of various DMFC portable power source demonstrations.

  1. Fire Service Training. Portable Fire Extinguishers. (Revised).

    Science.gov (United States)

    North Carolina State Dept. of Community Colleges, Raleigh.

    One of a set of fourteen instructional outlines for use in a course to train novice firemen, this guide covers the topic of portable fire extinguishers. Designed to be used with the Robert J. Brady Transparencies and/or the film "Portable Fire Extinguishers" and with the International Fire Service Training Association Manual No. 101,…

  2. Compact portable electric power sources

    Energy Technology Data Exchange (ETDEWEB)

    Fry, D.N.; Holcomb, D.E.; Munro, J.K.; Oakes, L.C.; Matson, M.J.

    1997-02-01

    This report provides an overview of recent advances in portable electric power source (PEPS) technology and an assessment of emerging PEPS technologies that may meet US Special Operations Command`s (SOCOM) needs in the next 1--2- and 3--5-year time frames. The assessment was performed through a literature search and interviews with experts in various laboratories and companies. Nineteen PEPS technologies were reviewed and characterized as (1) PEPSs that meet SOCOM requirements; (2) PEPSs that could fulfill requirements for special field conditions and locations; (3) potentially high-payoff sources that require additional R and D; and (4) sources unlikely to meet present SOCOM requirements. 6 figs., 10 tabs.

  3. RTOS kernel in portable electrocardiograph

    Science.gov (United States)

    Centeno, C. A.; Voos, J. A.; Riva, G. G.; Zerbini, C.; Gonzalez, E. A.

    2011-12-01

    This paper presents the use of a Real Time Operating System (RTOS) on a portable electrocardiograph based on a microcontroller platform. All medical device digital functions are performed by the microcontroller. The electrocardiograph CPU is based on the 18F4550 microcontroller, in which an uCOS-II RTOS can be embedded. The decision associated with the kernel use is based on its benefits, the license for educational use and its intrinsic time control and peripherals management. The feasibility of its use on the electrocardiograph is evaluated based on the minimum memory requirements due to the kernel structure. The kernel's own tools were used for time estimation and evaluation of resources used by each process. After this feasibility analysis, the migration from cyclic code to a structure based on separate processes or tasks able to synchronize events is used; resulting in an electrocardiograph running on one Central Processing Unit (CPU) based on RTOS.

  4. Portable Userspace Virtual Filesystem Switch

    Directory of Open Access Journals (Sweden)

    Łukasz Faber

    2013-01-01

    Full Text Available Multiple different filesystems — including disk-based, network, distributed, abstract — arean integral part of every operating system. They are usually written as kernel modules and abstracted to the user via a virtual filesystem switch. In this paper we analyse the feasibility of reimplementing the virtual filesystem switch as a userspace daemon and applicability of this approach in real-life usage. Such reimplementation will require a way to virtualise processes behaviour related to filesystem operations. The problem is non-trivial, as we assume limited capabilities of the VFS switch implemented in userspace. We present a layered architecture comprising of a monitoring process, the VFS abstraction and real filesystem implementations. All working in userspace. Then, we evaluate this solution in four areas: portability, feasibility, usability and performance. Our results demonstrate possible gains in using the userspace-based approach with monolithic kernels, but also underline problems that are encountered in this approach.

  5. iPad portable genius

    CERN Document Server

    McFedries, Paul

    2013-01-01

    Make the most of your iPad with these savvy tips and techniques The iPad, iPad Air, and iPad mini are taking the world by storm. This no-nonsense guide covers everything you want to know to take full advantage of all your iPad has to offer. Along with necessary basics about the newest iPad; iPad Air, iPad mini; and iOS; it gives you smart; innovative ways to accomplish a variety of tasks and tips to help you maximize the convenience of your Apple digital lifestyle. More than 100 million iPads have been sold; and the number continues to growHip and practical; Portable Genius guides are packed

  6. A Portable Diode Array Spectrophotometer.

    Science.gov (United States)

    Stephenson, David

    2016-05-01

    A cheap portable visible light spectrometer is presented. The spectrometer uses readily sourced items and could be constructed by anyone with a knowledge of electronics. The spectrometer covers the wavelength range 450-725 nm with a resolution better than 5 nm. The spectrometer uses a diffraction grating to separate wavelengths, which are detected using a 128-element diode array, the output of which is analyzed using a microprocessor. The spectrum is displayed on a small liquid crystal display screen and can be saved to a micro SD card for later analysis. Battery life (2 × AAA) is estimated to be 200 hours. The overall dimensions of the unit are 120 × 65 × 60 mm, and it weighs about 200 g. © The Author(s) 2016.

  7. Characterizing solar mirror materials using portable reflectometers

    Energy Technology Data Exchange (ETDEWEB)

    Pettit, R.B.

    1982-09-01

    Currently available portable instrumentation for hemispherical and specular reflectance measurements of solar mirror materials is discussed. Particular attention is given to the wavelength dependence of the measurement spectrum, which in most cases does not approximate a solar spectral distribution, and to other limitations of each instrument. Because a portable instrument is not available that can determine the solar averaged specular reflectance from a single measurement, two procedures are recommended for obtaining a reasonable estimate for this quantity using the existing portable equipment. Finally, future developments in this area are briefly discussed.

  8. One of the First Portable Macs

    CERN Multimedia

    1989-01-01

    It was one of the first portable macs released. The Portable had many new advances in mobile computing : The display was crispy clear, and looked beautiful when used in daylight ; The Portable came with a Lead-acid gel/cell battery that could run a anywhere from 6 -12 hours ; It supported to internal hard drives, and an external one. The reaction to the laptop was weak because it was slow, it had no capacity for expansion, it weighed heavily, its price was expensive. It has been stayed 1 year and half on the market.

  9. A Portable, High Resolution, Surface Measurement Device

    Science.gov (United States)

    Ihlefeld, Curtis M.; Burns, Bradley M.; Youngquist, Robert C.

    2012-01-01

    A high resolution, portable, surface measurement device has been demonstrated to provide micron-resolution topographical plots. This device was specifically developed to allow in-situ measurements of defects on the Space Shuttle Orbiter windows, but is versatile enough to be used on a wide variety of surfaces. This paper discusses the choice of an optical sensor and then the decisions required to convert a lab bench optical measurement device into an ergonomic portable system. The necessary trade-offs between performance and portability are presented along with a description of the device developed to measure Orbiter window defects.

  10. Evaluating Performance Portability of OpenACC

    Energy Technology Data Exchange (ETDEWEB)

    Sabne, Amit J [ORNL; Sakdhnagool, Putt [ORNL; Lee, Seyong [ORNL; Vetter, Jeffrey S [ORNL

    2015-01-01

    Accelerator-based heterogeneous computing is gaining momentum in High Performance Computing arena. However, the increased complexity of the accelerator architectures demands more generic, high-level programming models. OpenACC is one such attempt to tackle the problem. While the abstraction endowed by OpenACC offers productivity, it raises questions on its portability. This paper evaluates the performance portability obtained by OpenACC on twelve OpenACC programs on NVIDIA CUDA, AMD GCN, and Intel MIC architectures. We study the effects of various compiler optimizations and OpenACC program settings on these architectures to provide insights into the achieved performance portability.

  11. Development of portable fuel cells

    Energy Technology Data Exchange (ETDEWEB)

    Nakatou, K.; Sumi, S.; Nishizawa, N. [Sanyo Electric Co., Ltd., Osaka (Japan)

    1996-12-31

    Sanyo Electric has been concentrating on developing a marketable portable fuel cell using phosphoric acid fuel cells (PAFC). Due to the fact that this power source uses PAFC that operate at low temperature around 100{degrees} C, they are easier to handle compared to conventional fuel cells that operate at around 200{degrees} C , they can also be expected to provide extended reliable operation because corrosion of the electrode material and deterioration of the electrode catalyst are almost completely nonexistent. This power source is meant to be used independently and stored at room temperature. When it is started up, it generates electricity itself using its internal load to raise the temperature. As a result, the phosphoric acid (the electolyte) absorbs the reaction water when the temperature starts to be raised (around room temperature). At the same time the concentration and volume of the phosphoric acid changes, which may adversely affect the life time of the cell. We have studied means for starting, operating PAFC stack using methods that can simply evaluate changes in the concentration of the electrolyte in the stack with the aim of improving and extending cell life and report on them in this paper.

  12. Portable basketball rim testing device

    Science.gov (United States)

    Abbott, W. Bruce; Davis, Karl C.

    1993-01-01

    A portable basketball rim rebound testing device 10 is illustrated in two preferred embodiments for testing the rebound or energy absorption characteristics of a basketball rim 12 and its accompanying support to determine likely rebound or energy absorption charcteristics of the system. The apparatus 10 includes a depending frame 28 having a C-clamp 36 for releasably rigidly connecting the frame to the basketball rim 12. A glide weight 60 is mounted on a guide rod 52 permitting the weight 60 to be dropped against a calibrated spring 56 held on an abutment surface on the rod to generate for deflecting the basketball rim and then rebounding the weight upwardly. A photosensor 66 is mounted on the depending frame 28 to sense passage of reflective surfaces 75 on the weight to thereby obtain sufficient data to enable a processing means 26 to calculate the rebound velocity and relate it to an energy absorption percentage rate of the rim system 12. A readout is provided to display the energy absorption percentage.

  13. Portable Remote Imaging Spectrometer (PRISM) Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Develop an UV-NIR (350nm to 1050 nm) portable remote imaging spectrometer (PRISM) for flight on a variety of airborne platforms with high SNR and response...

  14. Portable Tablets in Science Museum Learning

    DEFF Research Database (Denmark)

    Gronemann, Sigurd Trolle

    2016-01-01

    Despite the increasing use of portable tablets in learning, their impact has received little attention in research. In five different projects, this media-ethnographic and design-based analysis of the use of portable tablets as a learning resource in science museums investigates how young people......’s learning with portable tablets matches the intentions of the museums. By applying media and information literacy (MIL) components as analytical dimensions, a pattern of discrepancies between young people’s expectations, their actual learning and the museums’ approaches to framing such learning...... of portable tablets indicates that in making pedagogical transformations to accommodate new technologies, museums risk opposing didactic intention if pedagogies do not sufficiently attend to young learners’ systemic expectations to learning and to their expectations to the digital experience influenced...

  15. 46 CFR 196.37-47 - Portable magazine chests.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Portable magazine chests. 196.37-47 Section 196.37-47... Markings for Fire and Emergency Equipment, etc. § 196.37-47 Portable magazine chests. (a) Portable magazine chests shall be marked in letters at least 3 inches high: PORTABLE MAGAZINE CHEST — FLAMMABLE — KEEP...

  16. 46 CFR 108.651 - Portable magazine chests.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Portable magazine chests. 108.651 Section 108.651... AND EQUIPMENT Equipment Markings and Instructions § 108.651 Portable magazine chests. Each portable magazine chest must be marked: “PORTABLE MAGAZINE CHEST—FLAMMABLE—KEEP LIGHTS AND FIRE AWAY” in letters at...

  17. 46 CFR 78.47-70 - Portable magazine chests.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Portable magazine chests. 78.47-70 Section 78.47-70... Fire and Emergency Equipment, Etc. § 78.47-70 Portable magazine chests. (a) Portable magazine chest shall be marked in letters of at least 3 inches high “PORTABLE MAGAZINE CHEST—FLAMMABLE—KEEP LIGHTS AND...

  18. 46 CFR 97.37-47 - Portable magazine chests.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Portable magazine chests. 97.37-47 Section 97.37-47... OPERATIONS Markings for Fire and Emergency Equipment, Etc. § 97.37-47 Portable magazine chests. (a) Portable magazine chests shall be marked in letters at least 3 inches high: “PORTABLE MAGAZINE CHEST—FLAMMABLE—KEEP...

  19. 46 CFR 169.743 - Portable magazine chests.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Portable magazine chests. 169.743 Section 169.743... Vessel Control, Miscellaneous Systems, and Equipment Markings § 169.743 Portable magazine chests. Portable magazine chests must be marked in letters at least 3 inches high: “PORTABLE MAGAZINE CHEST...

  20. Forensic Analysis of the Sony Playstation Portable

    Science.gov (United States)

    Conrad, Scott; Rodriguez, Carlos; Marberry, Chris; Craiger, Philip

    The Sony PlayStation Portable (PSP) is a popular portable gaming device with features such as wireless Internet access and image, music and movie playback. As with most systems built around a processor and storage, the PSP can be used for purposes other than it was originally intended - legal as well as illegal. This paper discusses the features of the PSP browser and suggests best practices for extracting digital evidence.

  1. Portability of Technical Skills Across Occupations

    OpenAIRE

    Mukuni, Joseph Siloka

    2012-01-01

    In the literature, much has been reported about skill shortages in the labor market and many solutions have been suggested but most of them do not appear to work well for developing countries. This study investigated the place of portable technical skills as an option for addressing skill shortages, particularly in developing countries. The objective of the study was to determine whether different occupations have portable technical skills, which graduates of workforce development programs ca...

  2. An expansion of the field modulus suitable for the description of strong field gradients in axisymmetric magnetic fields: application to single-sided magnet design, field mapping and STRAFI.

    Science.gov (United States)

    Hugon, Cedric; Aubert, Guy; Sakellariou, Dimitris

    2012-01-01

    Mapping (or plotting) the magnetic field has a critical importance for the achievement of the homogeneous magnetic field necessary to standard MR experiments. A powerful tool for this purpose is the Spherical Harmonic Expansion (SHE), which provides a simple way to describe the spatial variations of a field in free space. Well-controlled non-zero spatial variations of the field are critical to MRI. The resolution of the image is directly related to the strength of the gradient used to encode space. As a result, it is desirable to have strong variations of the field. In that case, the SHE cannot be used as is, because the field modulus variations are affected by the variations of all components of the field. In this paper, we propose a method based on the SHE to characterize such variations, theoretically and experimentally, in the limit of an axisymmetric magnetic field. Practical applications of this method are proposed through the examples of single-sided magnet design and characterization, along with Stray-Field Imaging (STRAFI). Copyright © 2011 Elsevier Inc. All rights reserved.

  3. 33 CFR 145.01 - Portable and semi-portable fire extinguishers.

    Science.gov (United States)

    2010-07-01

    ... extinguishers. 145.01 Section 145.01 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...-portable fire extinguishers. On all manned platforms and on all unmanned platforms where crews are continuously working on a 24-hour basis, approved type portable fire extinguishers and/or approved type semi...

  4. Portable smartphone based quantitative phase microscope

    Science.gov (United States)

    Meng, Xin; Tian, Xiaolin; Yu, Wei; Kong, Yan; Jiang, Zhilong; Liu, Fei; Xue, Liang; Liu, Cheng; Wang, Shouyu

    2018-01-01

    To realize portable device with high contrast imaging capability, we designed a quantitative phase microscope using transport of intensity equation method based on a smartphone. The whole system employs an objective and an eyepiece as imaging system and a cost-effective LED as illumination source. A 3-D printed cradle is used to align these components. Images of different focal planes are captured by manual focusing, followed by calculation of sample phase via a self-developed Android application. To validate its accuracy, we first tested the device by measuring a random phase plate with known phases, and then red blood cell smear, Pap smear, broad bean epidermis sections and monocot root were also measured to show its performance. Owing to its advantages as accuracy, high-contrast, cost-effective and portability, the portable smartphone based quantitative phase microscope is a promising tool which can be future adopted in remote healthcare and medical diagnosis.

  5. Design and construction of portable survey meter

    Science.gov (United States)

    Singseeta, W.; Thong-aram, D.; Pencharee, S.

    2017-09-01

    This work was aimed to design and construction of portable survey meter for radiation dose measuring. The designed system consists of 4 main parts consisting of low voltage power supply, radiation detection, radiation measurement and data display part on android phone. The test results show that the ripple voltage of low voltage power supply is less than 1%, the maximum integral counts are found to be 104 counts per second and the maximum distance of wireless commination between the server and the client is about 10 meter. It was found that the developed system had small size and light weight for portable instrument.

  6. Annual Adjustment Factors

    Data.gov (United States)

    Department of Housing and Urban Development — The Department of Housing and Urban Development establishes the rent adjustment factors - called Annual Adjustment Factors (AAFs) - on the basis of Consumer Price...

  7. Portable Tactile Aids for Speech Perception.

    Science.gov (United States)

    Lynch, Michael P.; And Others

    1989-01-01

    Experiments using portable tactile aids in speech perception are reviewed, focusing on training studies, additive benefit studies, and device comparison studies (including the "Tactaid II,""Tactaid V,""Tacticon 1600," and "Tickle Talker"). The potential of tactual information in perception of the overall…

  8. 29 CFR 1917.119 - Portable ladders.

    Science.gov (United States)

    2010-07-01

    ... achieve additional length. (5) Except for combination ladders, self-supporting ladders shall not be used as single straight ladders. (6) Unless intended for cantilever operation, non-self-supporting ladders... portable ladders obtained before October 3, 1983, shall be capable of supporting a 200-pound (890 N) load...

  9. Expanding portable B-WIM technology.

    Science.gov (United States)

    2011-06-28

    Advances in weigh-in-motion technology over the past 15 years have led to successful field application of a : commercial grade portable Bridge WIM system (B-WIM) in Europe. Under a previous UTCA Research : Project No. 07212, UTCA tested the state-of-...

  10. Portable AI Lab for Teaching Artificial Intelligence.

    Science.gov (United States)

    Rosner, Michael; Baj, Fabio.

    1993-01-01

    Describes the Portable AI Lab, a computing environment containing artificial intelligence (AI) tools, examples, and documentation for use with university AI courses. Two modules of the lab are highlighted: the automated theorem proving module and the natural language processing module, which includes augmented transition networks. (23 references)…

  11. Portable Data Logger for Photovoltaic Panels

    Science.gov (United States)

    Cole, S. W.

    1983-01-01

    Instrument measures rapidly changing knee of V-I curve with extra care. Portable data logger runs on own batteries. Includes microcomputer, which controls voltage-, current-measurement increment, and solid state memory, which stores data until transferred to EPROM module. Data logger is light, compact and easily caried to remote field locations.

  12. Portability of supplementary pension rights in Europe

    DEFF Research Database (Denmark)

    Guardiancich, Igor

    2015-01-01

    In its effort to guarantee the free movement of workers, the European Union devised an advanced system of coordination of social security rights. Since 1958, statutory pensions are being aggregated for workers moving across the Member States. However, until mid-2014, the portability of supplement......In its effort to guarantee the free movement of workers, the European Union devised an advanced system of coordination of social security rights. Since 1958, statutory pensions are being aggregated for workers moving across the Member States. However, until mid-2014, the portability...... of supplementary pension rights was not assured, there by undermining the freedom to labor mobility. This impaired the efficient allocation of labor, prevented sound family planning, infringed the fundamental right to social protection and during the Great Recession, hindered the employability of workers across...... a slowly recovering Europe. After nine years of negotiations, the EU has finally passed a Portability Directive, which is, however, a watered down version of the 2005 original proposal. Given such state of affairs, this study has three aims. First, it explains why portability of supplementary pensions...

  13. Very Portable Remote Automatic Weather Stations

    Science.gov (United States)

    John R. Warren

    1987-01-01

    Remote Automatic Weather Stations (RAWS) were introduced to Forest Service and Bureau of Land Management field units in 1978 following development, test, and evaluation activities conducted jointly by the two agencies. The original configuration was designed for semi-permanent installation. Subsequently, a need for a more portable RAWS was expressed, and one was...

  14. On the Portability of Prolog Applications

    NARCIS (Netherlands)

    Wielemaker, J.

    2011-01-01

    The non-portability of Prolog programs is widely considered one of the main problems facing Prolog programmers. Although since 1995, the core of the language is covered by the ISO standard 13211-1, this standard has not been sufficient to support large Prolog applications. As an approach to address

  15. Miniaturized, Portable Sensors Monitor Metabolic Health

    Science.gov (United States)

    2014-01-01

    In order to measure astronauts' metabolic rates in space, Glenn Research Center partnered with Case Western University and the Cleveland Clinic to develop the Portable Unit for Metabolic Analysis (PUMA). Cleveland-based Orbital Research licensed and then modified PUMA to help the US Navy assess pilot oxygen problems and is now designing a device that can be used in hospitals.

  16. High-Capacity, Portable Firefighting Pump

    Science.gov (United States)

    Burns, Ralph A.

    1988-01-01

    Report describes an evaluation of firefighting module that delivers water at 5,000 gal/min (320 L/s). Is compact, self-contained, portable water pump. Besides firefighting, module used for flood control, pumping water into large vessels, and pump water from sinking ships.

  17. A microcontroller-based portable electrocardiograph recorder.

    Science.gov (United States)

    Segura-Juárez, José J; Cuesta-Frau, David; Samblas-Pena, Luis; Aboy, Mateo

    2004-09-01

    We describe a low cost portable Holter design that can be implemented with off-the-shelf components. The recorder is battery powered and includes a graphical display and keyboard. The recorder is capable of acquiring up to 48 hours of continuous electrocardiogram data at a sample rate of up to 250 Hz.

  18. Portable and programmable clinical EOG diagnostic system.

    Science.gov (United States)

    Chen, S C; Tsai, T T; Luo, C H

    2000-01-01

    Monitoring eye movements is clinically important in diagnosis of diseases of the central nervous system. Electrooculography (EOG) is one method of obtaining such records which uses skin electrodes, and utilizes the anterior posterior polarization of the eye. A new EOG diagnostic system has been developed that utilizes two off-the-shelf portable notebook computers, one projector and simple electronic hardware. It can be operated under Windows 95, 98, NT, and has significant advantages over any other similar equipment, including programmability, portability, improved safety and low cost. Especially, portability of the instrument is extremely important for acutely ill or handicapped patients. The purpose of this paper is to introduce the techniques of computer animation, data acquisition, real time analysis of measured data, and database management to implement a portable, programmable and inexpensive contacting EOG instrument. It is very convenient to replace the present expensive, inflexible and large-sized commercially available EOG instruments. A lot of interesting stimulation patterns for clinical application can be created easily in different shape, time sequence, and colour by programming in Delphi language. With the help of Winstar (a software package that is used to control I/O and interrupt functions of the computer under Windows 95, 98, NT), the I/O communication between two notebook computers and A/D interface module can be effectively programmed. In addition, the new EOG diagnostic system is battery operated and it has the advantages of low noise as well as isolation from electricity. Two kinds of EOG tests, pursuit and saccade, were performed on 20 normal subjects with this new portable and programmable instrument. Based on the test result, the performance of the new instrument is superior to the other commercially available instruments. In conclusion, we hope that it will be more convenient for doctors and researchers to do the clinical EOG diagnosis

  19. 48 CFR 1852.237-71 - Pension portability.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Pension portability. 1852... 1852.237-71 Pension portability. As prescribed at 1837.110-70(b), insert the following clause: Pension Portability (JAN 1997) (a) In order for pension costs attributable to employees assigned to this contract to...

  20. 14 CFR 135.144 - Portable electronic devices.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Portable electronic devices. 135.144... Equipment § 135.144 Portable electronic devices. (a) Except as provided in paragraph (b) of this section, no... portable electronic device on any of the following U.S.-registered civil aircraft operating under this part...

  1. 14 CFR 125.204 - Portable electronic devices.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Portable electronic devices. 125.204... Equipment Requirements § 125.204 Portable electronic devices. (a) Except as provided in paragraph (b) of... operation of, any portable electronic device on any U.S.-registered civil aircraft operating under this part...

  2. 30 CFR 47.44 - Temporary, portable containers.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Temporary, portable containers. 47.44 Section... TRAINING HAZARD COMMUNICATION (HazCom) Container Labels and Other Forms of Warning § 47.44 Temporary, portable containers. (a) The operator does not have to label a temporary, portable container if he or she...

  3. 29 CFR 1915.132 - Portable electric tools.

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 7 2010-07-01 2010-07-01 false Portable electric tools. 1915.132 Section 1915.132 Labor... § 1915.132 Portable electric tools. The provisions of this section shall apply to ship repairing... frames of portable electric tools and appliances, except double insulated tools approved by Underwriters...

  4. 30 CFR 75.1703 - Portable electric lamps.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Portable electric lamps. 75.1703 Section 75... HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Miscellaneous § 75.1703 Portable electric lamps. Persons underground shall use only permissible electric lamps approved by the Secretary for portable...

  5. 46 CFR 196.37-23 - Hand portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Hand portable fire extinguishers. 196.37-23 Section 196... extinguishers. (a) Each hand portable fire extinguisher shall be marked with a number and the location where... of hand portable fire extinguisher is carried, the numbering may be omitted. ...

  6. 46 CFR 169.737 - Hand portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Hand portable fire extinguishers. 169.737 Section 169... extinguishers. Each hand portable fire extinguisher must be marked with a number, and the location where it is... one type and size of hand portable fire extinguisher is carried, the numbering may be omitted. ...

  7. 46 CFR 108.637 - Hand portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Hand portable fire extinguishers. 108.637 Section 108... DESIGN AND EQUIPMENT Equipment Markings and Instructions § 108.637 Hand portable fire extinguishers. (a) Each hand portable fire extinguisher must be marked with a number that identifies it in relation to all...

  8. 46 CFR 131.835 - Portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Portable fire extinguishers. 131.835 Section 131.835... Markings for Fire Equipment and Emergency Equipment § 131.835 Portable fire extinguishers. (a) Except as provided by paragraph (b) of this section, ach portable fire extinguisher must be marked with a number, and...

  9. 46 CFR 97.37-23 - Hand portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Hand portable fire extinguishers. 97.37-23 Section 97.37... OPERATIONS Markings for Fire and Emergency Equipment, Etc. § 97.37-23 Hand portable fire extinguishers. (a) Each hand portable fire extinguisher shall be marked with a number and the location where stowed shall...

  10. 33 CFR 127.1503 - Portable fire extinguishers.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Portable fire extinguishers. 127... Portable fire extinguishers. Each operator of a waterfront facility handling LHG must provide portable fire extinguishers of appropriate, number, size, and kind in the marine transfer area for LHG in accordance with NFPA...

  11. 46 CFR 2.75-25 - Portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Portable fire extinguishers. 2.75-25 Section 2.75-25... Personnel § 2.75-25 Portable fire extinguishers. (a) The portable fire extinguishers listed and labeled as... extinguishers to qualify being listed and labeled as marine type by a recognized laboratory are set forth in...

  12. 46 CFR 28.160 - Portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Portable fire extinguishers. 28.160 Section 28.160... FISHING INDUSTRY VESSELS Requirements for All Vessels § 28.160 Portable fire extinguishers. (a) Each... fire extinguishers specified in table 28.160. Table 28.160—Portable Fire Extinguishers for Vessels 65...

  13. 46 CFR 78.47-30 - Hand portable fire extinguishers.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Hand portable fire extinguishers. 78.47-30 Section 78.47... Markings for Fire and Emergency Equipment, Etc. § 78.47-30 Hand portable fire extinguishers. (a) Each hand portable fire extinguisher shall be marked with a number and the location where stowed shall be marked with...

  14. 33 CFR 127.603 - Portable fire extinguishers.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Portable fire extinguishers. 127... extinguishers. Each marine transfer area for LNG must have— (a) Portable fire extinguishers that meet 9-6.1 of NFPA 59A and Chapter 3 of NFPA 10; and (b) At least one portable fire extinguisher in each designated...

  15. 46 CFR 107.235 - Servicing of hand portable fire extinguishers, semi-portable fire extinguishers and fixed fire...

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Servicing of hand portable fire extinguishers, semi-portable fire extinguishers and fixed fire-extinguishing systems. 107.235 Section 107.235 Shipping COAST... CERTIFICATION Inspection and Certification § 107.235 Servicing of hand portable fire extinguishers, semi...

  16. Portable light transmission measuring system for preserved corneas

    Directory of Open Access Journals (Sweden)

    de Jesus Gabriel

    2005-12-01

    Full Text Available Abstract Background The authors have developed a small portable device for the objective measurement of the transparency of corneas stored in preservative medium, for use by eye banks in evaluation prior to transplantation. Methods The optical system consists of a white light, lenses, and pinholes that collimate the white light beams and illuminate the cornea in its preservative medium, and an optical filter (400–700 nm that selects the range of the wavelength of interest. A sensor detects the light that passes through the cornea, and the average corneal transparency is displayed. In order to obtain only the tissue transparency, an electronic circuit was built to detect a baseline input of the preservative medium prior to the measurement of corneal transparency. The operation of the system involves three steps: adjusting the "0 %" transmittance of the instrument, determining the "100 %" transmittance of the system, and finally measuring the transparency of the preserved cornea inside the storage medium. Results Fifty selected corneas were evaluated. Each cornea was submitted to three evaluation methods: subjective classification of transparency through a slit lamp, quantification of the transmittance of light using a corneal spectrophotometer previously developed, and measurement of transparency with the portable device. Conclusion By comparing the three methods and using the expertise of eye bank trained personnel, a table for quantifying corneal transparency with the new device has been developed. The correlation factor between the corneal spectrophotometer and the new device is 0,99813, leading to a system that is able to standardize transparency measurements of preserved corneas, which is currently done subjectively.

  17. An accurate and portable solid state neutron rem meter

    Energy Technology Data Exchange (ETDEWEB)

    Oakes, T.M. [Nuclear Science and Engineering Institute, University of Missouri, Columbia, MO (United States); Bellinger, S.L. [Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS (United States); Miller, W.H. [Nuclear Science and Engineering Institute, University of Missouri, Columbia, MO (United States); Missouri University Research Reactor, Columbia, MO (United States); Myers, E.R. [Department of Physics, University of Missouri, Kansas City, MO (United States); Fronk, R.G.; Cooper, B.W [Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS (United States); Sobering, T.J. [Electronics Design Laboratory, Kansas State University, KS (United States); Scott, P.R. [Department of Physics, University of Missouri, Kansas City, MO (United States); Ugorowski, P.; McGregor, D.S; Shultis, J.K. [Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS (United States); Caruso, A.N., E-mail: carusoan@umkc.edu [Department of Physics, University of Missouri, Kansas City, MO (United States)

    2013-08-11

    Accurately resolving the ambient neutron dose equivalent spanning the thermal to 15 MeV energy range with a single configuration and lightweight instrument is desirable. This paper presents the design of a portable, high intrinsic efficiency, and accurate neutron rem meter whose energy-dependent response is electronically adjusted to a chosen neutron dose equivalent standard. The instrument may be classified as a moderating type neutron spectrometer, based on an adaptation to the classical Bonner sphere and position sensitive long counter, which, simultaneously counts thermalized neutrons by high thermal efficiency solid state neutron detectors. The use of multiple detectors and moderator arranged along an axis of symmetry (e.g., long axis of a cylinder) with known neutron-slowing properties allows for the construction of a linear combination of responses that approximate the ambient neutron dose equivalent. Variations on the detector configuration are investigated via Monte Carlo N-Particle simulations to minimize the total instrument mass while maintaining acceptable response accuracy—a dose error less than 15% for bare {sup 252}Cf, bare AmBe, an epi-thermal and mixed monoenergetic sources is found at less than 4.5 kg moderator mass in all studied cases. A comparison of the energy dependent dose equivalent response and resultant energy dependent dose equivalent error of the present dosimeter to commercially-available portable rem meters and the prior art are presented. Finally, the present design is assessed by comparison of the simulated output resulting from applications of several known neutron sources and dose rates.

  18. Adjustable suture strabismus surgery

    Science.gov (United States)

    Nihalani, B R; Hunter, D G

    2011-01-01

    Surgical management of strabismus remains a challenge because surgical success rates, short-term and long-term, are not ideal. Adjustable suture strabismus surgery has been available for decades as a tool to potentially enhance the surgical outcomes. Intellectually, it seems logical that having a second chance to improve the outcome of a strabismus procedure should increase the overall success rate and reduce the reoperation rate. Yet, adjustable suture surgery has not gained universal acceptance, partly because Level 1 evidence of its advantages is lacking, and partly because the learning curve for accurate decision making during suture adjustment may span a decade or more. In this review we describe the indications, techniques, and published results of adjustable suture surgery. We will discuss the option of ‘no adjustment' in cases with satisfactory alignment with emphasis on recent advances allowing for delayed adjustment. The use of adjustable sutures in special circumstances will also be reviewed. Consistently improved outcomes in the adjustable arm of nearly all retrospective studies support the advantage of the adjustable option, and strabismus surgeons are advised to become facile in the application of this approach. PMID:21760626

  19. Theory of adaptive adjustment

    Directory of Open Access Journals (Sweden)

    Weihong Huang

    2000-01-01

    Full Text Available Conventional adaptive expectation as a mechanism of stabilizing an unstable economic process is reexamined through a generalization to an adaptive adjustment framework. The generic structures of equilibria that can be stabilized through an adaptive adjustment mechanism are identified. The generalization can be applied to a broad class of discrete economic processes where the variables interested can be adjusted or controlled directly by economic agents such as in cobweb dynamics, Cournot games, Oligopoly markets, tatonnement price adjustment, tariff games, population control through immigration etc.

  20. Portable power applications of fuel cells

    Energy Technology Data Exchange (ETDEWEB)

    Weston, M.; Matcham, J.

    2002-07-01

    This report describes the state-of-the-art of fuel cell technology for portable power applications. The study involved a comprehensive literature review. Proton exchange membrane fuel cells (PEMFCs) have attracted much more interest than either direct methanol fuel cells (DMFCs) or solid oxide fuel cells (SOFCs). However, issues relating to fuel choice and catalyst design remain with PEMFCs; DMFCs have excellent potential provided issues relating to the conducting membrane can be resolved but the current high temperature of operation and low power density currently makes SOFCs less applicable to portable applications. Available products are listed and the obstacles to market penetration are discussed. The main barriers are cost and the size/weight of fuel cells compared with batteries. Another key problem is the lack of a suitable fuel infrastructure.

  1. Tracking correction for portable coal inventory instrument

    Science.gov (United States)

    Yang, Deshan; Dong, Lili; Liang, Qianqian; Zhang, Wang; Xu, Wenhai

    2017-03-01

    In the process of measuring the tracking of portable coal inventory instrument, the location accuracy is reduced and the tracking is broken due to float solution of RTK. A tracking correction method based on RTK localization data is proposed. First, the location data of the float solution is filtered by the median filtering algorithm, which reduces the location err and dispersion of the float solution. Then the forward and inverse position estimation is performed by using the fixed solution data before and after the track breakage. The filtering of the float solution positioning data for translation and rotation, make the first point and the end point coincidence with the point estimated. Complete measurement track stitching. In the actual coal inventory experiment, the measurement error is improved from 12.6% to 0.79% after tracking corrected. By using this method we can effectively solve the tracking deviation of actual measurement of coal, improve the portable coal inventory instrument measuring accuracy and adaptability.

  2. Carbon Monoxide Poisoning from Portable Electrical Generators.

    Science.gov (United States)

    Hampson, Neil B; Dunn, Susan L

    2015-08-01

    Portable electrical generators have been responsible for over 800 accidental carbon monoxide (CO) poisoning deaths in the United States from 1999-2012. Because mortality figures are typically the only data reported with regard to the adverse effects of generators, we describe a nonfatal segment of the poisoned population to further emphasize the significance of the problem. Unidentifiable information about patients treated in the United States with hyperbaric oxygen for acute CO poisoning was prospectively reported by participating centers. Those patients poisoned by portable generators were selected for analysis. Of 1604 patients reported from August 1, 2008 to July 31, 2011, there were 264 accidentally poisoned by portable generators. Exposures occurred in 151 incidents in 33 states. In 99 incidents, poisoning occurred in a residence. Average patient age was 37 ± 20 years (range 1 to 90+ years). Of those poisoned, 146 (55%) were non-Hispanic white, 57 (22%) were black, 52 (20%) were Hispanic white, 4 (2%) were Asian, and 4 (2%) were Native American. English was spoken by 96%. The most common symptoms included headache (62%), dizziness (52%), and loss of consciousness (50%). Blood carboxyhemoglobin levels averaged 22.7 ± 9.0% (range 2.3-48.3%). Thirty-six patients demonstrated evidence of cardiac ischemia. Acute, severe CO poisoning from portable electric generators is common in the United States, likely affecting an estimated 4000 individuals annually, occurring predominantly in residential settings, and affecting English language-speaking individuals. Copyright © 2015 Elsevier Inc. All rights reserved.

  3. Security risks arising from portable storage devices

    CSIR Research Space (South Africa)

    Molotsi, K

    2012-10-01

    Full Text Available phones, Personal Digital Assistants (PDAs) and other devices with ancillary storage function as shown in Figure 1. BENEFITS OF USING PSDs ? Provide an easy way of transporting data ? Improve productivity ? Provide flexibility ? Easy to store... technology in the workplace. International Journal of Electronic Security and Digital Forensics. 3(1): 73?81 [3] Kim, K., Kim, E. & Hong S. (2009). Privacy information protection in portable device. Proceedings of International Conference on Convergence...

  4. Portable Hybrid Powered Water Filtration Device

    OpenAIRE

    Maria Lourdes V. Balansay; Mary Rose Q. Añonuevo; Rexzel M. Cuenca; Ricmart V. Garbin

    2015-01-01

    The existing water filtration device has features that can be developed to be more useful and functional during emergency situations. The project’s development has been aided by following provisions in PEC, NEC, NEMA and Philippine National Standard for Safe Drinking Water provide standards for the construction of the project. These standards protect both the prototype and the user. These also served as guide for the maintenance of every component. The design of the portable hybri...

  5. Rain VM: Portable Concurrency through Managing Code

    OpenAIRE

    Brown, Neil C.C.

    2006-01-01

    A long-running recent trend in computer programming is the growth in popularity of virtual machines. However, few have included good support for concurrency - a natural mechanism in the Rain programming language. This paper details the design and implementation of a secure virtual machine with support for concurrency, which enables portability of concurrent programs. Possible implementation ideas of many-to-many threading models for the virtual machine kernel are discussed, and initial benchm...

  6. Engineering task plan for five portable exhausters

    Energy Technology Data Exchange (ETDEWEB)

    Rensink, G.E.

    1997-10-01

    Exhausters will be employed to ventilate certain single-shell tanks (SSTs) during salt well pumping campaigns. Active ventilation is necessary to reduce the potential flammable gas inventory (LANL 1996a) in the dome space that may accumulate during steady-state conditions or during/after postulated episodic gas release events. The tanks described in this plan support the activities required to fabricate and test three 500 cfm portable exhausters in the 200 W area shops, and to procure, design, fabricate and test two 1000 cfm units. Appropriate Notice of Construction (NOC) radiological and toxic air pollutant permits will be obtained for the portable exhausters. The portable exhauster design media to be employed to support this task was previously developed for the 241-A-101 exhauster. The same design as A101 will be fabricated with only minor improvements to the design based upon operator input/lessons learned. The safety authorization basis for this program effort will follow SAD 36 (LANL 1996b), and each tank will be reviewed against this SAD for changes or updates. The 1000 cfm units will be designed by the selected offsite contractor according to the specification requirements in KHC-S-O490. The offsite units have been specified to utilize as many of the same components as the 500 cfm units to ensure a more cost effective operation and maintenance through the reduction of spare parts and additional procedures.

  7. Comparison between the conventional method and a portable device for determination of INR

    Directory of Open Access Journals (Sweden)

    André Camacho Oliveira Araújo

    2014-04-01

    Full Text Available CONTEXT: Anticoagulation with warfarin is considered the appropriate treatment for venous thromboembolism and other thrombotic pathologies. Regular INR control is required for dosage adjustment and therapeutic control. Use of portable monitoring systems optimizes management of these patients. OBJECTIVE: To compare INR measurements taken using the portable Coaguchek XS system in capillary blood with the standard laboratory method using venous blood. METHOD: Fifty-two samples each of venous and capillary blood were collected from nineteen patients on warfarin, who had been admitted to the Hospital da Beneficência Portuguesa de São Paulo, and analyzed using the conventional method and the Coaguchek XS system, respectively. RESULTS: Spearman's correlation coefficient ® for the overall performance of the two methods was 0.978 (p0.714. CONCLUSIONS: The Coaguchek XS system can be used to monitor prothrombin time in patients on oral anticoagulants, provided INR values greater than 3.5 are confirmed using the conventional laboratory method.

  8. ADJUSTABLE CHIP HOLDER

    DEFF Research Database (Denmark)

    2009-01-01

    An adjustable microchip holder for holding a microchip is provided having a plurality of displaceable interconnection pads for connecting the connection holes of a microchip with one or more external devices or equipment. The adjustable microchip holder can fit different sizes of microchips with ...

  9. University students' adjustment problems.

    Science.gov (United States)

    Cherian, V I; Cherian, L

    1998-06-01

    Considerable information is available on the adjustment problems of first-year university students in developed countries, but comparatively little is known about such problems in Asia and Africa. This study of a representative sample of 1257 first-year students conducted at the University of the North showed that 33 to 85% of the first-year students experienced various adjustment problems.

  10. Installation and Adjustment Procedure for the Portable Pier and PlaneWave CDK 17 Telescope

    Science.gov (United States)

    2012-08-01

    specified to sit on a 10’ circular platform and is raised, by a Pentalift scissor lift , 9’ up into a shuttered 2.5m ObservaDome dome for observing...15 Figure 8.2 Carefully lifting the 120 lb equatorial fork onto the 100 lb polar assembly ....................... 15 Figure 8.3 Securing the...directions. • Standard 110V grounded electrical outlets must be available on the lift platform. 2 Distribution A: Approved for public release

  11. Adjustment of macroeconomic imbalances

    Directory of Open Access Journals (Sweden)

    Georgeta Barbulescu

    2013-03-01

    Full Text Available The global financial and economic crisis was the factor that triggered the adjustment of macroeconomic imbalances accumulated in Romania. The current account deficit and budget deficit were two major structural imbalances that have created a high vulnerability for the economy and explained the extent of economic contraction in Romania during the economic crisis. This article identifies the main causes that lead to the need for fiscal adjustment both in the EU and in Romania, as well as main effects of adjustments in respect of their experience in recent years. The article deals with this topic, because the current topical debate in the field of fiscal adjustments implemented both in the EU and our country, and their need for economic activity aimed at economic recovery.

  12. Remotely Adjustable Hydraulic Pump

    Science.gov (United States)

    Kouns, H. H.; Gardner, L. D.

    1987-01-01

    Outlet pressure adjusted to match varying loads. Electrohydraulic servo has positioned sleeve in leftmost position, adjusting outlet pressure to maximum value. Sleeve in equilibrium position, with control land covering control port. For lowest pressure setting, sleeve shifted toward right by increased pressure on sleeve shoulder from servovalve. Pump used in aircraft and robots, where hydraulic actuators repeatedly turned on and off, changing pump load frequently and over wide range.

  13. Weighted triangulation adjustment

    Science.gov (United States)

    Anderson, Walter L.

    1969-01-01

    The variation of coordinates method is employed to perform a weighted least squares adjustment of horizontal survey networks. Geodetic coordinates are required for each fixed and adjustable station. A preliminary inverse geodetic position computation is made for each observed line. Weights associated with each observed equation for direction, azimuth, and distance are applied in the formation of the normal equations in-the least squares adjustment. The number of normal equations that may be solved is twice the number of new stations and less than 150. When the normal equations are solved, shifts are produced at adjustable stations. Previously computed correction factors are applied to the shifts and a most probable geodetic position is found for each adjustable station. Pinal azimuths and distances are computed. These may be written onto magnetic tape for subsequent computation of state plane or grid coordinates. Input consists of punch cards containing project identification, program options, and position and observation information. Results listed include preliminary and final positions, residuals, observation equations, solution of the normal equations showing magnitudes of shifts, and a plot of each adjusted and fixed station. During processing, data sets containing irrecoverable errors are rejected and the type of error is listed. The computer resumes processing of additional data sets.. Other conditions cause warning-errors to be issued, and processing continues with the current data set.

  14. Fringe projection profilometry with portable consumer devices

    Science.gov (United States)

    Liu, Danji; Pan, Zhipeng; Wu, Yuxiang; Yue, Huimin

    2018-01-01

    A fringe projection profilometry (FPP) using portable consumer devices is attractive because it can realize optical three dimensional (3D) measurement for ordinary consumers in their daily lives. We demonstrate a FPP using a camera in a smart mobile phone and a digital consumer mini projector. In our experiment of testing the smart phone (iphone7) camera performance, the rare-facing camera in the iphone7 causes the FPP to have a fringe contrast ratio of 0.546, nonlinear carrier phase aberration value of 0.6 rad, and nonlinear phase error of 0.08 rad and RMS random phase error of 0.033 rad. In contrast, the FPP using the industrial camera has a fringe contrast ratio of 0.715, nonlinear carrier phase aberration value of 0.5 rad, nonlinear phase error of 0.05 rad and RMS random phase error of 0.011 rad. Good performance is achieved by using the FPP composed of an iphone7 and a mini projector. 3D information of a facemask with a size for an adult is also measured by using the FPP that uses portable consumer devices. After the system calibration, the 3D absolute information of the facemask is obtained. The measured results are in good agreement with the ones that are carried out in a traditional way. Our results show that it is possible to use portable consumer devices to construct a good FPP, which is useful for ordinary people to get 3D information in their daily lives.

  15. Using Portable Transducers to Measure Tremor Severity

    Directory of Open Access Journals (Sweden)

    Rodger Elble

    2016-05-01

    Full Text Available Background: Portable motion transducers, suitable for measuring tremor, are now available at a reasonable cost. The use of these transducers requires knowledge of their limitations and data analysis. The purpose of this review is to provide a practical overview and example software for using portable motion transducers in the quantification of tremor. Methods: Medline was searched via PubMed.gov in December 2015 using the Boolean expression “tremor AND (accelerometer OR accelerometry OR gyroscope OR inertial measurement unit OR digitizing tablet OR transducer.” Abstracts of 419 papers dating back to 1964 were reviewed for relevant portable transducers and methods of tremor analysis, and 105 papers written in English were reviewed in detail. Results: Accelerometers, gyroscopes, and digitizing tablets are used most commonly, but few are sold for the purpose of measuring tremor. Consequently, most software for tremor analysis is developed by the user. Wearable transducers are capable of recording tremor continuously, in the absence of a clinician. Tremor amplitude, frequency, and occurrence (percentage of time with tremor can be computed. Tremor amplitude and occurrence correlate strongly with clinical ratings of tremor severity. Discussion: Transducers provide measurements of tremor amplitude that are objective, precise, and valid, but the precision and accuracy of transducers are mitigated by natural variability in tremor amplitude. This variability is so great that the minimum detectable change in amplitude, exceeding random variability, is comparable for scales and transducers. Research is needed to determine the feasibility of detecting smaller change using averaged data from continuous long-term recordings with wearable transducers.

  16. Compressed Sensing for Elastography in Portable Ultrasound.

    Science.gov (United States)

    Shin, Bonghun; Jeon, Soo; Ryu, Jeongwon; Kwon, Hyock Ju

    2017-11-01

    Portable ultrasound is recently emerging as a new medical imaging modality featuring high portability, easy connectivity, and real-time on-site diagnostic ability. However, it does not yet provide ultrasound elastography function that enables the diagnosis of malignant lesions using elastic properties. This is mainly due to the limitations of hardware performance and wireless data transfer speed for processing the large amount of data for elastography. Therefore, data transfer reduction is one of the feasible solutions to overcome these limitations. Recently, compressive sensing (CS) theory has been rigorously studied as a means to break the conventional Nyquist sampling rate and thus can significantly decrease the amount of measurement signals without sacrificing signal quality. In this research, we implemented various CS reconstruction frameworks and comparatively evaluated their reconstruction performance for realizing ultrasound elastography function on portable ultrasound. Combinations of three most common model bases (Fourier transform [FT], discrete cosine transform [DCT], and wave atom [WA]) and two reconstruction algorithms (L1 minimization and block sparse Bayesian learning [BSBL]) were considered for CS frameworks. Echoic and elastography phantoms, were developed to evaluate the performance of CS on B-mode images and elastograms. To assess the reconstruction quality, mean absolute error (MAE), signal-to-noise ratio (SNRe), and contrast-to-noise ratio (CNRe) were measured on the B-mode images and elastograms from CS reconstructions. Results suggest that CS reconstruction adopting BSBL algorithm with DCT model basis can yield the best results for all the measures tested, and the maximum data reduction rate for producing readily discernable elastograms is around 60%.

  17. Technology assessment of portable energy RDT and P, phase 1

    Science.gov (United States)

    Spraul, J. R. (Compiler)

    1975-01-01

    A technological assessment of portable energy research, development, technology, and production was undertaken to assess the technical, economic, environmental, and sociopolitical issues associated with portable energy options. Those courses of action are discussed which would impact aviation and air transportation research and technology. Technology assessment workshops were held to develop problem statements. The eighteen portable energy problem statements are discussed in detail along with each program's objective, approach, task description, and estimates of time and costs.

  18. Man-portable LIBS for landmine detection

    Science.gov (United States)

    Harmon, Russell S.; De Lucia, Frank C.; LaPointe, Aaron; Miziolek, Andrzej W.

    2006-05-01

    Laser Induced Breakdown Spectroscopy (LIBS) is an emerging, minimally-destructive sensor technology for in-situ, real-time chemical species identification and analysis. The Army Research Laboratory has been engaged in LIBS analysis for over a decade and recently has been investigating the potential to apply broadband LIBS analysis to specific military problems, one of which is as a handheld, confirmatory sensor for landmine detection. Laboratory tests with a prototype man-portable LIBS system demonstrate a high degree of success in identifying landmine casings.

  19. Portable cosmic muon telescope for environmental applications

    Science.gov (United States)

    Barnaföldi, Gergely Gábor; Hamar, Gergő; Melegh, Hunor Gergely; Oláh, László; Surányi, Gergely; Varga, Dezső

    2012-10-01

    A portable, low power consumption cosmic muon tracking system based on Close Cathode MWPC technology is presented, which is designed for operation in highly humid environmental conditions such as underground caves, tunnels, or cellars. The system measures the angular distribution of cosmic muons with resolution of 10 mrad, allowing for a tomographic mapping of the soil density above the detector unit. The size of the detector, 0.1 m2 of total sensitive surface, was designed to fulfill the requirement of transport through humanly passable natural cave tunnels. First results from the Ariadne Cave System in Pilis Mountains, Hungary are shown, which constrains the necessary data taking time for meaningful tomographic mapping.

  20. A Portable Nuclear Magnetic Resonance Sensor System

    Directory of Open Access Journals (Sweden)

    R. Dykstra

    2008-04-01

    Full Text Available Nuclear Magnetic Resonance (NMR is a relatively complex technique and normally requires expensive equipment, however with advances in computing, electronics and permanent magnet technologies, NMR is becoming more feasible as a non-invasive tool for industry. The strength of NMR is its ability to probe at the molecular level and hence gain information about molecular structure, organization, abundance and orientation. This paper presents some of the work being undertaken in developing portable NMR systems for the non-destructive testing of materials such as polymer composites, rubber, timber and concrete.

  1. Portable SERS Instrument for Explosives Monitoring

    Science.gov (United States)

    2006-04-01

    instrument. Figure 2. Photograph of the portable Raman instrument in the trunk of a rental car at ALAAP. The laser (blue) is sitting on top of the...di scret e artifac t s and / or e levated baselines . caus ing mi s interpretati on of the c hromat og rams. All of these ma t e ri a l s mus t be...nd nd nd nd nd nd nd 3 nd nd GW-18-001 201 57 258 220 185 62 247 261 196 71 267 141 37 178 GW-18-001- Top 178 24 202 209 153 29 182 184 163 31 194 nr

  2. Embedded Data Processor and Portable Computer Technology testbeds

    Science.gov (United States)

    Alena, Richard; Liu, Yuan-Kwei; Goforth, Andre; Fernquist, Alan R.

    1993-01-01

    Attention is given to current activities in the Embedded Data Processor and Portable Computer Technology testbed configurations that are part of the Advanced Data Systems Architectures Testbed at the Information Sciences Division at NASA Ames Research Center. The Embedded Data Processor Testbed evaluates advanced microprocessors for potential use in mission and payload applications within the Space Station Freedom Program. The Portable Computer Technology (PCT) Testbed integrates and demonstrates advanced portable computing devices and data system architectures. The PCT Testbed uses both commercial and custom-developed devices to demonstrate the feasibility of functional expansion and networking for portable computers in flight missions.

  3. Design and Performance of a Portable and Multichannel SPR Device

    Directory of Open Access Journals (Sweden)

    Xiao-ling Zhang

    2017-06-01

    Full Text Available A portable multichannel surface plasmon resonance (SPR biosensor device is presented in this study. As an optical biosensor device, the core component of its light path is a semi-cylindrical prism, which is used as the coupling unit for the excitation of the SPR phenomena. Based on this prism, a wedge-shaped incident light beam including a continuous angle range (10° is chosen to replace the commonly-used parallel light beam in traditional SPR devices, in which the incident angle is adjusted by a sophisticated mechanical system. Thus, complicated, cumbersome, and costly mechanical structures can be avoided in this design. Furthermore, the selection of a small and high-stability semiconductor laser and matrix CCD detector as well as a microfluidic system aids in the realization of a miniaturized and multichannel device. Several different samples were used to test the performance of this new device. For ethanol with different concentrations, the sensing response was of good linear relativity with the concentration (Y = 3.17143X + 2.81518, R2 = 0.97661. Mouse IgG and goat anti-mouse IgG were used as biological samples for immunological analysis, and BSA as the control group. Good specific recognition between mouse IgG and goat anti-mouse IgG has been achieved. The detection limit of antibody to antigen coated on the sensing surface was about 25 mg/L without surface modification.

  4. POINTER: Portable Intelligent Trainer for External Robotics

    Science.gov (United States)

    Kuiper, Hilbert; Rikken, Patrick J.

    1994-01-01

    Intelligent tutoring systems (ITS's) play an increasing role in training and education of people with different levels of skill and knowledge. As compared to conventional computer based training (CBT) an ITS provides more tailored instruction by trying to mimic the teaching behavior of a human instructor as much as possible and is therefore much more flexible. This paper starts with an introduction to ITS's, followed by the description of an ITS for training of an (astronaut) operator in monitoring and controlling robotic arm procedures. The robotic arm will be used for exchange of equipment between a space station and a space plane involving critical and accurate movements of the robotic arm. The ITS for this application, called Pointer, is developed by TNO Physics and Electronics Laboratory and is based upon an existing ITS that includes procedural training. Pointer has been developed on a workstation whereas the target platform was a portable computer. Therefore, a lot of attention had to be paid to scaling effects and keeping up with user friendliness of the much smaller user interface. Although the learning domain was the control of a robotic arm, it is clear that use of intelligent training technologies on a portable computer has many other applications (payload operations, operation control rooms, etc.). Training can occur at any time and place in an attractive and cost effective way.

  5. Intelligent hand-portable proliferation sensing system

    Energy Technology Data Exchange (ETDEWEB)

    Dieckman, S.L.; Bostrom, G.A.; Waterfield, L.G.; Jendrzejczyk, J.A.; Ahuja, S.; Raptis, A.C.

    1997-08-01

    Argonne National Laboratory, with support from DOE`s Office of Nonproliferation and National Security, is currently developing an intelligent hand-portable sensor system. This system is designed specifically to support the intelligence community with the task of in-field sensing of nuclear proliferation and related activities. Based upon pulsed laser photo-ionization time-of-flight mass spectrometry technology, this novel sensing system is capable of quickly providing a molecular or atomic analysis of specimens. The system is capable of analyzing virtually any gas phase molecule, or molecule that can be induced into the gas phase by (for example) sample heating. This system has the unique advantages of providing unprecedented portability, excellent sensitivity, tremendous fieldability, and a high performance/cost ratio. The system will be capable of operating in a highly automated manner for on-site inspections, and easily modified for other applications such as perimeter monitoring aboard a plane or drone. The paper describes the sensing system.

  6. A portable optical human sweat sensor

    Science.gov (United States)

    Al-omari, Mahmoud; Liu, Gengchen; Mueller, Anja; Mock, Adam; Ghosh, Ruby N.; Smith, Kyle; Kaya, Tolga

    2014-11-01

    We describe the use of HNQ (2-hydroxy-1,4-naphthoquinone or Lawsone) as a potential sweat sensor material to detect the hydration levels of human beings. We have conducted optical measurements using both artificial and human sweat to validate our approach. We have determined that the dominant compound that affects HNQ absorbance in artificial sweat is sodium. The presence of lactate decreases the reactivity of HNQ while urea promotes more interactions of sodium and potassium ions with HNQ. The interactions between the hydroxyl group of HNQ and the artificial sweat components (salts, lactic acid, and urea) were investigated comprehensively. We have also proposed and developed a portable diode laser absorption sensor system that converts the absorbance at a particular wavelength range (at 455 ± 5 nm, where HNQ has an absorbance peak) into light intensity measurements via a photocell. The absorbance intensity values obtained from our portable sensor system agrees within 10.4% with measurements from a laboratory based ultraviolet-visible spectrometer. Findings of this research will provide significant information for researchers who are focusing on real-time, in-situ hydration level detection.

  7. DOE Centers of Excellence Performance Portability Meeting

    Energy Technology Data Exchange (ETDEWEB)

    Neely, J. R. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2016-04-21

    Performance portability is a phrase often used, but not well understood. The DOE is deploying systems at all of the major facilities across ASCR and ASC that are forcing application developers to confront head-on the challenges of running applications across these diverse systems. With GPU-based systems at the OLCF and LLNL, and Phi-based systems landing at NERSC, ACES (LANL/SNL), and the ALCF – the issue of performance portability is confronting the DOE mission like never before. A new best practice in the DOE is to include “Centers of Excellence” with each major procurement, with a goal of focusing efforts on preparing key applications to be ready for the systems coming to each site, and engaging the vendors directly in a “shared fate” approach to ensuring success. While each COE is necessarily focused on a particular deployment, applications almost invariably must be able to run effectively across the entire DOE HPC ecosystem. This tension between optimizing performance for a particular platform, while still being able to run with acceptable performance wherever the resources are available, is the crux of the challenge we call “performance portability”. This meeting was an opportunity to bring application developers, software providers, and vendors together to discuss this challenge and begin to chart a path forward.

  8. Portable top drive cuts horizontal drilling costs

    Energy Technology Data Exchange (ETDEWEB)

    Jackson, B. [Saskoil, Regina, Saskatchewan (Canada); Yager, D. [Tesco Drilling Tech., Calgary, Alberta (Canada)

    1993-11-01

    Economic analysis of a seven-well, long-reach horizontal drilling program into an unconsolidated, heavy-oil-bearing reservoir in Winter field near the Alberta/Saskatchewan border in Canada reveals that -- in the right application -- renting a portable top drive drilling system can reduce total drilling costs. Use of the portable top drive combined with other cost-saving measures enabled Saskoil, one of Canada`s larger independents, to drill more cheaply, on a cost-per-meter basis, in 1993 than in 1992. This was despite significant rental rates for drilling rigs and directional drilling services caused by increased demand in Western Canada. Total cost savings of 10% on wells that would otherwise cost in the (C) $500,000 range are believed realistic. Based on this year`s performance, Saskoil recommends top drive for the company`s future horizontal wells in this area. This article describes the operator`s horizontal well program, advantages of top drive in that program and how it was installed and applied. Estimated time savings for six wells, plus other ways top drive can cut costs and improve operations are discussed.

  9. Portable Hybrid Powered Water Filtration Device

    Directory of Open Access Journals (Sweden)

    Maria Lourdes V. Balansay

    2015-08-01

    Full Text Available The existing water filtration device has features that can be developed to be more useful and functional during emergency situations. The project’s development has been aided by following provisions in PEC, NEC, NEMA and Philippine National Standard for Safe Drinking Water provide standards for the construction of the project. These standards protect both the prototype and the user. These also served as guide for the maintenance of every component. The design of the portable hybrid powered water filtration device shows that the project has more advanced features such as portability and the power supply used such as photovoltaic module solar cells and manually operated generator. This also shows its effectiveness and reliability based on the results of discharging test, water quality test and water production test. Based on analysis of the overall financial aspects, the machine can be profitable and the amount of revenue and operating cost will increase as years pass. Using the proper machine/ tools and methods of fabrication helps in easy assembly of the project. The materials and components used are cost effective and efficient. The best time for charging the battery using solar panel is 9:00 am onwards while the hand crank generator is too slow because the generated current is little. The water filtration device is very efficient regarding the operating hours and water production. The machine may have a great effect to society and economy in generation of clean available water at less cost.

  10. Field-portable lensfree tomographic microscope†

    Science.gov (United States)

    Isikman, Serhan O.; Bishara, Waheb; Sikora, Uzair; Yaglidere, Oguzhan; Yeah, John; Ozcan, Aydogan

    2011-01-01

    We present a field-portable lensfree tomographic microscope, which can achieve sectional imaging of a large volume (~20 mm3) on a chip with an axial resolution of optic waveguide are controlled through a cost-effective micro-processor to sequentially illuminate the sample from different angles to record lensfree holograms of the sample that is placed on the top of a digital sensor array. In order to generate pixel super-resolved (SR) lensfree holograms and hence digitally improve the achievable lateral resolution, multiple sub-pixel shifted holograms are recorded at each illumination angle by electromagnetically actuating the fibre-optic waveguides using compact coils and magnets. These SR projection holograms obtained over an angular range of ~50° are rapidly reconstructed to yield projection images of the sample, which can then be back-projected to compute tomograms of the objects on the sensor-chip. The performance of this compact and light-weight lensfree tomographic microscope is validated by imaging micro-beads of different dimensions as well as a Hymenolepis nana egg, which is an infectious parasitic flatworm. Achieving a decent three-dimensional spatial resolution, this field-portable on-chip optical tomographic microscope might provide a useful toolset for telemedicine and high-throughput imaging applications in resource-poor settings. PMID:21573311

  11. Field-portable lensfree tomographic microscope.

    Science.gov (United States)

    Isikman, Serhan O; Bishara, Waheb; Sikora, Uzair; Yaglidere, Oguzhan; Yeah, John; Ozcan, Aydogan

    2011-07-07

    We present a field-portable lensfree tomographic microscope, which can achieve sectional imaging of a large volume (∼20 mm(3)) on a chip with an axial resolution of optic waveguide are controlled through a cost-effective micro-processor to sequentially illuminate the sample from different angles to record lensfree holograms of the sample that is placed on the top of a digital sensor array. In order to generate pixel super-resolved (SR) lensfree holograms and hence digitally improve the achievable lateral resolution, multiple sub-pixel shifted holograms are recorded at each illumination angle by electromagnetically actuating the fibre-optic waveguides using compact coils and magnets. These SR projection holograms obtained over an angular range of ±50° are rapidly reconstructed to yield projection images of the sample, which can then be back-projected to compute tomograms of the objects on the sensor-chip. The performance of this compact and light-weight lensfree tomographic microscope is validated by imaging micro-beads of different dimensions as well as a Hymenolepis nana egg, which is an infectious parasitic flatworm. Achieving a decent three-dimensional spatial resolution, this field-portable on-chip optical tomographic microscope might provide a useful toolset for telemedicine and high-throughput imaging applications in resource-poor settings. This journal is © The Royal Society of Chemistry 2011

  12. Portable Radiation Package (PRP) Instrument Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Reynolds, R Michael [Remote Measurements and Research Company, Seattle, WA (United States)

    2017-08-03

    The Portable Radiation Package (PRP) was developed to provide basic radiation information in locations such as ships at sea where proper exposure is remote and difficult, the platform is in motion, and azimuth alignment is not fixed. Development of the PRP began at Brookhaven National Laboratory (BNL) in the mid-1990s and versions of it were deployed on ships in the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility’s Nauru-99 project. The PRP was deployed on ships in support of the National Aeronautics and Space Administration (NASA) Sensor Intercomparison for Marine Biological and Interdisciplinary Ocean Studies (SIMBIOS) program. Over the years the measurements have remained the same while the post-processing data analysis, especially for the FRSR, has evolved. This document describes the next-generation Portable Radiation Package (PRP2) that was developed for the DOE ARM Facility, under contract no. 9F-31462 from Argonne National Laboratory (ANL). The PRP2 has the same scientific principles that were well validated in prior studies, but has upgraded electronic hardware. The PRP2 approach is completely modular, both in hardware and software. Each sensor input is treated as a separate serial stream into the data collection computer. In this way the operator has complete access to each component of the system for purposes of error checking, calibration, and maintenance. The resulting system is more reliable, easier to install in complex situations, and more amenable to upgrade.

  13. How star women build portable skills.

    Science.gov (United States)

    Groysberg, Boris

    2008-02-01

    In May 2004, with the war for talent in high gear, Groysberg and colleagues from Harvard Business School wrote in these pages about the risks of hiring star performers away from competitors. After studying the fortunes of more than 1,000 star stock analysts, they found that when a star switched companies, not only did his performance plunge, so did the effectiveness of the group he joined and the market value of his new company. But further analysis of the data reveals that it's not that simple. In fact, one group of analysts reliably maintained star rankings even after changing employers: women. Unlike their male counterparts, female stars who switched firms performed just as well, in the aggregate, as those who stayed put. The 189 star women in the sample (18% of the star analysts studied) achieved a higher rank after switching firms than the men did. Why the discrepancy? First, says the author, the best female analysts appear to have built their franchises on portable, external relationships with clients and the companies they covered, rather than on relationships rooted within their firms. By contrast, male analysts built up greater firm- and team-specific human capital by investing more in the internal networks and unique capabilities and resources of their own companies. Second, women took greater care when assessing a prospective new employer. In this article, Groysberg explores the reasons behind the star women's portable performance.

  14. Clinical documentation variations and NLP system portability: a case study in asthma birth cohorts across institutions.

    Science.gov (United States)

    Sohn, Sunghwan; Wang, Yanshan; Wi, Chung-Il; Krusemark, Elizabeth A; Ryu, Euijung; Ali, Mir H; Juhn, Young J; Liu, Hongfang

    2017-11-30

    To assess clinical documentation variations across health care institutions using different electronic medical record systems and investigate how they affect natural language processing (NLP) system portability. Birth cohorts from Mayo Clinic and Sanford Children's Hospital (SCH) were used in this study (n = 298 for each). Documentation variations regarding asthma between the 2 cohorts were examined in various aspects: (1) overall corpus at the word level (ie, lexical variation), (2) topics and asthma-related concepts (ie, semantic variation), and (3) clinical note types (ie, process variation). We compared those statistics and explored NLP system portability for asthma ascertainment in 2 stages: prototype and refinement. There exist notable lexical variations (word-level similarity = 0.669) and process variations (differences in major note types containing asthma-related concepts). However, semantic-level corpora were relatively homogeneous (topic similarity = 0.944, asthma-related concept similarity = 0.971). The NLP system for asthma ascertainment had an F-score of 0.937 at Mayo, and produced 0.813 (prototype) and 0.908 (refinement) when applied at SCH. The criteria for asthma ascertainment are largely dependent on asthma-related concepts. Therefore, we believe that semantic similarity is important to estimate NLP system portability. As the Mayo Clinic and SCH corpora were relatively homogeneous at a semantic level, the NLP system, developed at Mayo Clinic, was imported to SCH successfully with proper adjustments to deal with the intrinsic corpus heterogeneity.

  15. The portability of the "Electronics Workbench" simulation software to China

    NARCIS (Netherlands)

    Collis, Betty; Zhi-Cheng, Dong

    1993-01-01

    This article discusses the portability of the Canadian-made simulation software package, "Electronic Workbench" package (EWB) to China. As part of a larger project investigating the portability of various educational software packages, the EWB package was used in electronics instruction in China and

  16. 36 CFR 1194.26 - Desktop and portable computers.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Desktop and portable computers. 1194.26 Section 1194.26 Parks, Forests, and Public Property ARCHITECTURAL AND TRANSPORTATION... § 1194.26 Desktop and portable computers. (a) All mechanically operated controls and keys shall comply...

  17. 14 CFR 91.21 - Portable electronic devices.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Portable electronic devices. 91.21 Section... electronic devices. (a) Except as provided in paragraph (b) of this section, no person may operate, nor may any operator or pilot in command of an aircraft allow the operation of, any portable electronic device...

  18. 14 CFR 121.306 - Portable electronic devices.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Portable electronic devices. 121.306... Portable electronic devices. (a) Except as provided in paragraph (b) of this section, no person may operate... electronic device on any U.S.-registered civil aircraft operating under this part. (b) Paragraph (a) of this...

  19. Clinical use ofa portable electronic device to measure haematocrit

    African Journals Online (AJOL)

    Clinical use ofa portable electronic device to measure haematocrit. A. J. GROENEWALD, H. PIETERS, A. DE WAAL. Abstract A sIIIall portable device called the blood electro- meter (HEM) was developed to assist clinicians to distinguish patients with extreme blood loss from those with normal packed cell volwnes.

  20. MOBILE NUMBER PORTABILITY IN GHANA: SIX YEARS OF ...

    African Journals Online (AJOL)

    Okae P.

    2011-07-07

    Jul 7, 2011 ... Science World Journal Vol 12(No 4) 2017 www.scienceworldjournal.org. ISSN 1597-6343. Mobile Number Portability in Ghana: Six Years of Customer Satisfaction. MOBILE NUMBER PORTABILITY IN GHANA: SIX YEARS OF. CUSTOMER SATISFACTION. Percy Okae. Computer Engineering Department ...

  1. 29 CFR 1910.25 - Portable wood ladders.

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 5 2010-07-01 2010-07-01 false Portable wood ladders. 1910.25 Section 1910.25 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR OCCUPATIONAL SAFETY AND HEALTH STANDARDS Walking-Working Surfaces § 1910.25 Portable wood ladders. (a) Application of requirements. This section i...

  2. Adjustment of International Students.

    Science.gov (United States)

    Stafford, Thomas H., Jr.; And Others

    1980-01-01

    International students (N=747) completed a questionnaire to obtain information about their adjustment so that special services could be developed for them. Homesickness was their greatest area of concern, as well as housing, social relationships, the English language, and finances. (RC)

  3. Adjustment to Retirement

    NARCIS (Netherlands)

    van Solinge, H.; Krauss Withbourne, S.

    2016-01-01

    Retirement is an important life course event that marks the start of a new life stage in which work is no longer dominant. Thus, employees have to adjust to the significant life changes that accompany the transition and seek to achieve psychological comfort with their retirement life. This entry

  4. Rural to Urban Adjustment

    Science.gov (United States)

    Abramson, Jane A.

    Personal interviews with 100 former farm operators living in Saskatoon, Saskatchewan, were conducted in an attempt to understand the nature of the adjustment process caused by migration from rural to urban surroundings. Requirements for inclusion in the study were that respondents had owned or operated a farm for at least 3 years, had left their…

  5. Psychosocial adjustment following ostomy.

    Science.gov (United States)

    Follick, M J; Smith, T W; Turk, D C

    1984-01-01

    Ostomy patients have been identified as a chronic illness population frequently experiencing adjustment difficulties. The present study, based on the biopsychosocial model (Engel, 1977) of chronic illness, examined a range of post-surgical adjustment difficulties in a sample of 131 ostomy patients. The patient population reported experiencing a significant number of technical, emotional, social, marital/family, and sexual difficulties post-surgically. Technical difficulties were associated with impaired emotional, social, and marital/family functioning. Emotional difficulties were also associated with problematic social, marital/family adjustment, and impaired sexual functioning. Technical problems, emotional difficulties, and social problems were all associated with the patient's perception of having received inadequate preparatory information. Marital/family and sexual maladjustment, on the other hand, were associated with low levels of perceived social support. The results of this investigation are interpreted as supporting the biopsychosocial model of chronic illness, and the clinical implications of these findings are discussed as well as their relation to previous research on adjustment to stressful medical procedures.

  6. Environmentally Adjusted Elasticity Measures

    OpenAIRE

    Shaik, Saleem

    2005-01-01

    Here, using input, output and nitrogen pollution data related to one state, we propose to extend the elasticity concept to include environmental pollution treated as undesirable output to provide the environmentally adjusted elasticity measures for the period, 1936-1997 in a two-step procedure.

  7. Incisor adjustment in rabbits.

    Science.gov (United States)

    Brown, Cyndi

    2009-06-01

    Rabbit incisor teeth are open-rooted and, in healthy animals, grow continuously. Incisor adjustments are often necessary to maintain the health and well-being of rabbits with incisor malocclusion. This column will describe some techniques used to manage incisor malocclusion in the rabbit.

  8. 78 FR 34669 - Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data...

    Science.gov (United States)

    2013-06-10

    ... COMMISSION Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data..., California (``Apple''), from importing wireless communication devices, portable music and data processing... importation of certain electronic devices, including wireless communication devices, portable music and data...

  9. 75 FR 68619 - In the Matter of Certain Wireless Communication Devices, Portable Music and Data Processing...

    Science.gov (United States)

    2010-11-08

    ... COMMISSION In the Matter of Certain Wireless Communication Devices, Portable Music and Data Processing... certain wireless communication devices, portable music and data processing devices, computers and... certain wireless communication devices, portable music and data processing devices, computers and...

  10. 77 FR 58576 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers...

    Science.gov (United States)

    2012-09-21

    ... COMMISSION Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers, and... importation of certain wireless communication devices, portable music and data processing devices, computers... after importation of certain wireless communication devices, portable music and data processing devices...

  11. 78 FR 74167 - Portable Fire Extinguishers (Annual Maintenance Certification Record); Extension of the Office of...

    Science.gov (United States)

    2013-12-10

    ... Occupational Safety and Health Administration Portable Fire Extinguishers (Annual Maintenance Certification... the Portable Fire Extinguishers Standard (Annual Maintenance Certification Record) (29 CFR 1910.157(e... specifies that employers must subject each portable fire extinguisher to an annual maintenance inspection...

  12. 76 FR 31798 - Airworthiness Directives; L'Hotellier Portable Halon 1211 Fire Extinguishers

    Science.gov (United States)

    2011-06-02

    ... Portable Halon 1211 Fire Extinguishers AGENCY: Federal Aviation Administration, DOT. ACTION: Final rule... fire extinguishers. This action requires replacing each unairworthy portable fire extinguisher with an airworthy portable fire extinguisher. This amendment is prompted by an ongoing investigation that has...

  13. Portable Prescreening System for Sleep Apnea

    DEFF Research Database (Denmark)

    Guul, Martin Kjær; Jennum, Poul; Sørensen, Helge Bjarup Dissing

    2016-01-01

    Obstructive sleep apnea (OSA) occurs in more than 4 % of the adult population. Diagnoses for OSA in sleep clinics are costly and more than half of those submitted to a sleep clinic do not have OSA. A simple, easy, and portable homebased monitoring system to evaluate who are in high- or low risk...... for sleep apnea is at high risk or low risk of having OSA. A new test setup was developed containing an Android based smartphone, the built in accelerometer, and a microphone. To ease the clinical analysis of the data a MATLAB based graphical user interface has been developed visualizing the data allowing...... the user to navigate through the data and the detected apnea events. The events are classified using both features from the audio and the signal from the accelerometer placed on sternum. Furthermore using the accelerometer data the sleep position is estimated and the morphology from the respiratory pattern...

  14. Portable prescreening system for sleep apnea

    DEFF Research Database (Denmark)

    Guul, Martin Kjaer; Jennum, Poul; Sorensen, Helge B D

    2016-01-01

    Obstructive sleep apnea (OSA) occurs in more than 4 % of the adult population. Diagnoses for OSA in sleep clinics are costly and more than half of those submitted to a sleep clinic do not have OSA. A simple, easy, and portable homebased monitoring system to evaluate who are in high-or low risk...... for sleep apnea is at high risk or low risk of having OSA. A new test setup was developed containing an Android based smartphone, the built in accelerometer, and a microphone. To ease the clinical analysis of the data a MATLAB based graphical user interface has been developed visualizing the data allowing...... the user to navigate through the data and the detected apnea events. The events are classified using both features from the audio and the signal from the accelerometer placed on sternum. Furthermore using the accelerometer data the sleep position is estimated and the morphology from the respiratory pattern...

  15. Portable calibration instrument of hemodialysis unit

    Science.gov (United States)

    Jin, Liang-bing; Li, Dong-sheng; Chen, Ai-jun

    2013-01-01

    For the purpose of meeting the rapid development of blood purification in China, improve the level of blood purification treatment, and get rid of the plight of the foreign technology monopolization to promise patients' medical safety, a parameter-calibrator for the hemodialysis unit, which can detect simultaneously multi-parameter, is designed. The instrument includes a loop, which connects to the hemodialysis unit. Sensors are in the loop in series, so that the dialysis can flow through this loop and the sensors can acquisitive data of various parameters. In order to facilitate detection and carrying, the integrated circuit part modularly based on the ultralow-power microcontrollers,TI MSP430 is designed. High-performance and small-packaged components are used to establish a modular, high-precision, multi-functional, portable system. The functions and the key technical indexes of the instrument have reached the level of products abroad.

  16. MacBook Pro Portable Genius

    CERN Document Server

    Miser, Brad

    2011-01-01

    Tips and techniques for forward-thinking MacBook Pro users Now that you have a MacBook Pro, you need just one more accessory, your very own copy of MacBook Pro Portable Genius, Third Edition. This handy, compact book lets you in on a wealth of tips and tricks, so you get the very most out of Apple's very popular notebook. Discover the latest on the most recent release of iLife, get the skinny on the new Intel Core i7 and i5 processors in the Pro, see how to go wireless in a smart way, and much more. The book is easy to navigate, doesn't skimp on the essentials, and helps you save time and avoi

  17. Portable EDXRF for Quality Assurance of Cosmetics

    Directory of Open Access Journals (Sweden)

    Fábio Luiz Melquiades

    2015-08-01

    Full Text Available Portable Energy Dispersive X-ray Fluorescence is a viable, cost and time effective analytical technique for qualitative and quantitative evaluation of a wide range of samples. The objective of this study is to present a methodology for quantification of nail polishes, eye shadows, lipsticks and lip gloss using thin film geometry. The samples were applied over thin films, simulating its use on face and nails. It was possible to quantify S, K, Ca, Ti, Mn, Fe, Cu, Zn, Br, Rb, Sr, Ba and Bi. The methodology is viable and could be useful to forensic science, quality control on industry of raw materials or final products and supervision by regulatory agencies.

  18. IRIS PASSCAL Instrument Center: Advancing Portable Seismology

    Science.gov (United States)

    Beaudoin, B. C.; Bilek, S. L.; Anderson, K. R.

    2016-12-01

    IRIS PASSCAL has supported portable seismology for 30 years providing instrumentation and services for nearly 1200 PI-driven experiments. Throughout this time, the scientific community continues to pursue cutting-edge science questions, requiring a steady evolution of IRIS PASSCAL Instrument Center (PIC) services. Deployment strategies and station designs have evolved with the introduction of new technology and from the collective experience of the PI community. New equipment, new power technologies, and extreme environments provide additional challenges. Experiments have also increased in size and complexity, requiring new methods of handling and integrating data. Several recent developments and enhancements to communications hardware, data management, station power, and station design have simplified logistics and increased station reliability. Here we present: advancements in Iridium communications station state-of-health and data transmission; evaluation of battery technologies that simplify station design; software for integrating and storing multimode experiment data; and next generation station designs.

  19. NASA ISS Portable Fan Assembly Acoustics

    Science.gov (United States)

    Boone, Andrew; Allen, Christopher S.; Hess, Linda F.

    2018-01-01

    The Portable Fan Assembly (PFA) is a variable speed fan that can be used to provide additional ventilation inside International Space Station (ISS) modules as needed for crew comfort or for enhanced mixing of the ISS atmosphere. This fan can also be configured with a Shuttle era lithium hydroxide (LiOH) canister for CO2 removal in confined areas partially of fully isolated from the primary Environmental Control and Life Support System (ECLSS) on ISS which is responsible for CO2 removal. This report documents noise emission levels of the PFA at various speed settings and configurations. It also documents the acoustic attenuation effects realized when circulating air through the PFA inlet and outlet mufflers and when operating in its CO2 removal configuration (CRK) with a LiOH canister (sorbent bed) installed over the fan outlet.

  20. Batteryless magneto-driven portable radiac

    Science.gov (United States)

    Waechter, D.A.; Bjarke, G.O.; Trujillo, F.; Wolf, M.A.; Umbarger, C.J.

    1984-10-19

    A hand-powerd alternator for generating an alternating voltage provides same through a rectifier to a high capacity capacitor which stores the resultant dc voltage and drives a voltage regulator to provide a constant low voltage output for a portable radiation detection instrument. The instrument includes a Geiger-Mueller detector tube whose output is fed to a pulse detector and then through an event counter and LCD driver circuit to an LCD bar graph for visual display. An audio driver and an audio output is also provided. All circuitry used is low power so that the capacitor can be readily charged to a sufficient level to provide power for at least 30 minutes. A low voltage indicator is provided on the LCD display to indicate the need for manual recharging.

  1. Disposable cartridge biosensor platform for portable diagnostics

    Science.gov (United States)

    Yaras, Yusuf S.; Cakmak, Onur; Gunduz, Ali B.; Saglam, Gokhan; Olcer, Selim; Mostafazadeh, Aref; Baris, Ibrahim; Civitci, Fehmi; Yaralioglu, Goksen G.; Urey, Hakan

    2017-03-01

    We developed two types of cantilever-based biosensors for portable diagnostics applications. One sensor is based on MEMS cantilever chip mounted in a microfluidic channel and the other sensor is based on a movable optical fiber placed across a microfluidic channel. Both types of sensors were aimed at direct mechanical measurement of coagulation time in a disposable cartridge using plasma or whole blood samples. There are several similarities and also some important differences between the MEMS based and the optical fiber based solutions. The aim of this paper is to provide a comparison between the two solutions and the results. For both types of sensors, actuation of the cantilever or the moving fiber is achieved using an electro coil and the readout is optical. Since both the actuation and sensing are remote, no electrical connections are required for the cartridge. Therefore it is possible to build low cost disposable cartridges. The reader unit for the cartridge contains light sources, photodetectors, the electro coil, a heater, analog electronics, and a microprocessor. The reader unit has different optical interfaces for the cartridges that have MEMS cantilevers and moving fibers. MEMS based platform has better sensitivity but optomechanical alignment is a challenge and measurements with whole blood were not possible due to high scattering of light by the red blood cells. Fiber sensor based platform has relaxed optomechanical tolerances, ease of manufacturing, and it allows measurements in whole blood. Both sensors were tested using control plasma samples for activated-Partial-Thromboplastin-Time (aPTT) measurements. Control plasma test results matched with the manufacturer's datasheet. Optical fiber based system was tested for aPTT tests with human whole blood samples and the proposed platform provided repeatable test results making the system method of choice for portable diagnostics.

  2. A scaler-timer for portable instruments

    DEFF Research Database (Denmark)

    Løvborg, Leif

    1967-01-01

    A compact scaler-timer with adjustable scale factor and counting period is described. The circuit is for the most part fully integrated and is powered from a rechargeable Ni-Cd battery.......A compact scaler-timer with adjustable scale factor and counting period is described. The circuit is for the most part fully integrated and is powered from a rechargeable Ni-Cd battery....

  3. Metric adjusted skew information

    DEFF Research Database (Denmark)

    Hansen, Frank

    2008-01-01

    establish a connection between the geometrical formulation of quantum statistics as proposed by Chentsov and Morozova and measures of quantum information as introduced by Wigner and Yanase and extended in this article. We show that the set of normalized Morozova-Chentsov functions describing the possible...... quantum statistics is a Bauer simplex and determine its extreme points. We determine a particularly simple skew information, the "¿-skew information," parametrized by a ¿ ¿ (0, 1], and show that the convex cone this family generates coincides with the set of all metric adjusted skew informations.......We extend the concept of Wigner-Yanase-Dyson skew information to something we call "metric adjusted skew information" (of a state with respect to a conserved observable). This "skew information" is intended to be a non-negative quantity bounded by the variance (of an observable in a state...

  4. Sustainable urban regime adjustments

    DEFF Research Database (Denmark)

    Quitzau, Maj-Britt; Jensen, Jens Stissing; Elle, Morten

    2013-01-01

    The endogenous agency that urban governments increasingly portray by making conscious and planned efforts to adjust the regimes they operate within is currently not well captured in transition studies. There is a need to acknowledge the ambiguity of regime enactment at the urban scale. This directs...... attention to the transformative implications of conscious strategic maneuvering by incumbent regime actors, when confronting regime structurations. This article provides insight to processes of regime enactment performed by local governments by applying a flow-oriented perspective on regime dynamics......, inspired by Actor-Network Theory to demonstrate that regime incumbent actors can induce gradual regime adjustments at the urban scale. This is done through a case study of an urban development project, where the Municipality of Egedal in Denmark has successfully promoted energy efficient buildings through...

  5. Adjustable Autonomy Testbed

    Science.gov (United States)

    Malin, Jane T.; Schrenkenghost, Debra K.

    2001-01-01

    The Adjustable Autonomy Testbed (AAT) is a simulation-based testbed located in the Intelligent Systems Laboratory in the Automation, Robotics and Simulation Division at NASA Johnson Space Center. The purpose of the testbed is to support evaluation and validation of prototypes of adjustable autonomous agent software for control and fault management for complex systems. The AA T project has developed prototype adjustable autonomous agent software and human interfaces for cooperative fault management. This software builds on current autonomous agent technology by altering the architecture, components and interfaces for effective teamwork between autonomous systems and human experts. Autonomous agents include a planner, flexible executive, low level control and deductive model-based fault isolation. Adjustable autonomy is intended to increase the flexibility and effectiveness of fault management with an autonomous system. The test domain for this work is control of advanced life support systems for habitats for planetary exploration. The CONFIG hybrid discrete event simulation environment provides flexible and dynamically reconfigurable models of the behavior of components and fluids in the life support systems. Both discrete event and continuous (discrete time) simulation are supported, and flows and pressures are computed globally. This provides fast dynamic simulations of interacting hardware systems in closed loops that can be reconfigured during operations scenarios, producing complex cascading effects of operations and failures. Current object-oriented model libraries support modeling of fluid systems, and models have been developed of physico-chemical and biological subsystems for processing advanced life support gases. In FY01, water recovery system models will be developed.

  6. Automatic temperature adjustment apparatus

    Science.gov (United States)

    Chaplin, James E.

    1985-01-01

    An apparatus for increasing the efficiency of a conventional central space heating system is disclosed. The temperature of a fluid heating medium is adjusted based on a measurement of the external temperature, and a system parameter. The system parameter is periodically modified based on a closed loop process that monitors the operation of the heating system. This closed loop process provides a heating medium temperature value that is very near the optimum for energy efficiency.

  7. PORTABLE PEM FUEL CELL SYSTEM: WATER AND HEAT MANAGEMENT

    Directory of Open Access Journals (Sweden)

    SITI NAJIBAH ABD RAHMAN

    2016-07-01

    Full Text Available Portable polymer electrolyte membrane (PEM fuel cell power generator is a PEM fuel cell application that is used as an external charger to supply the demand for high energy. Different environments at various ambient temperatures and humidity levels affect the performance of PEM fuel cell power generators. Thermal and water management in portable PEM fuel cells are a critical technical barrier for the commercialization of this technology. The size and weight of the portable PEM fuel cells used for thermal and water management systems that determine the performance of portable PEM fuel cells also need to be considered. The main objective of this paper review was to determine the importance of water and thermal management systems in portable PEM fuel cells. Additionally, this review investigated heat transfer and water transport in PEM fuel cells. Given that portable PEM fuel cells with different powers require different thermal and water management systems, this review also discussed and compared management systems for low-, medium-, and high-power portable PEM fuel cells.

  8. Cloud portability and interoperability issues and current trends

    CERN Document Server

    Di Martino, Beniamino; Esposito, Antonio

    2015-01-01

    This book offers readers a quick, comprehensive and up-to-date overview of the most important methodologies, technologies, APIs and standards related to the portability and interoperability of cloud applications and services, illustrated by a number of use cases representing a variety of interoperability and portability scenarios. The lack of portability and interoperability between cloud platforms at different service levels is the main issue affecting cloud-based services today. The brokering, negotiation, management, monitoring and reconfiguration of cloud resources are challenging tasks

  9. Impact of Burst Buffer Architectures on Application Portability

    Energy Technology Data Exchange (ETDEWEB)

    Harms, Kevin [Argonne National Lab. (ANL), Argonne, IL (United States); Oral, H. Sarp [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Science; Atchley, Scott [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Science; Vazhkudai, Sudharshan S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Science

    2016-09-30

    The Oak Ridge and Argonne Leadership Computing Facilities are both receiving new systems under the Collaboration of Oak Ridge, Argonne, and Livermore (CORAL) program. Because they are both part of the INCITE program, applications need to be portable between these two facilities. However, the Summit and Aurora systems will be vastly different architectures, including their I/O subsystems. While both systems will have POSIX-compliant parallel file systems, their Burst Buffer technologies will be different. This difference may pose challenges to application portability between facilities. Application developers need to pay attention to specific burst buffer implementations to maximize code portability.

  10. Technical Evaluation Report 57: Portable Applications in Mobile Education

    Directory of Open Access Journals (Sweden)

    Jon Baggaley

    2006-09-01

    Full Text Available Portable software applications can be carried on a convenient storage medium such as a USB drive, and offer numerous benefits to mobile teachers and learner. The article illustrates the growing field of ‘portable apps’ in reviews of seven contrasting products. These represent the major categories of document editing, email maintenance, Internet browsing, instant messaging, file transfer, multimedia presentation, and anti-virus protection. Emphasis is placed on ways to use ‘portable apps’ to overcome the common problems of Internet usage during travel.

  11. Laser Spiderweb Sensor Used with Portable Handheld Devices

    Science.gov (United States)

    Scott, David C. (Inventor); Ksendzov, Alexander (Inventor); George, Warren P. (Inventor); Smith, James A. (Inventor); Aljabri, Abdullah S. (Inventor); Steinkraus, Joel M. (Inventor); Bendig, Rudi M. (Inventor); Hofmann, Douglas C. (Inventor)

    2017-01-01

    A portable spectrometer, including a smart phone case storing a portable spectrometer, wherein the portable spectrometer includes a cavity; a source for emitting electromagnetic radiation that is directed on a sample in the cavity, wherein the electromagnetic radiation is reflected within the cavity to form multiple passes of the electromagnetic radiation through the sample; a detector for detecting the electromagnetic radiation after the electromagnetic radiation has made the multiple passes through the sample in the cavity, the detector outputting a signal in response to the detecting; and a device for communicating the signal to a smart phone, wherein the smart phone executes an application that performs a spectral analysis of the signal.

  12. Power conditioning of fuel cell systems in portable applications

    Energy Technology Data Exchange (ETDEWEB)

    Brey, J.J.; Bordallo, C.R. [Hynergreen Technologies S.A. Avenida de la Buhaira, 2. 41018 SEVILLE (Spain); Carrasco, J.M.; Galvan, E.; Jimenez, A. [School of Engineering, University of Seville, Camino de los Descubrimientos s/n. 41092 SEVILLE (Spain); Moreno, E. [Instalaciones Inabensa S.A., c/Manuel Velasco Pando no. 7, 41007, SEVILLE (Spain)

    2007-07-15

    Fuel cells are emerging as main power source for portable applications. These devices need power management circuit to connect varying output fuel cell voltage to desired regulated voltage load with high efficiency. Maintaining high efficiency of the converter over a wide loading range can improve stored fuel longevity. The purpose of this paper is to report a general review of most used topologies in fuel cell power conditioning applied to portable systems. Finally, a 100 W DC-DC converter for a particular fuel cell portable application will be presented. This converter was designed to fulfill several specifications of input and output voltage. (author)

  13. Adjustable Reeds For Weaving

    Science.gov (United States)

    Farley, Gary L.

    1994-01-01

    Local characteristics of fabrics varied to suit special applications. Adjustable reed machinery proposed for use in weaving fabrics in various net shapes, widths, yarn spacings, and yarn angles. Locations of edges of fabric and configuration of warp and filling yarns varied along fabric to obtain specified properties. In machinery, reed wires mounted in groups on sliders, mounted on lengthwise rails in reed frame. Mechanisms incorporated to move sliders lengthwise, parallel to warp yarns, by sliding them along rails; move sliders crosswise by translating reed frame rails perpendicular to warp yarns; and crosswise by spreading reed rails within group. Profile of reed wires in group on each slider changed.

  14. Continuously adjustable Pulfrich spectacles

    Science.gov (United States)

    Jacobs, Ken; Karpf, Ron

    2011-03-01

    A number of Pulfrich 3-D movies and TV shows have been produced, but the standard implementation has inherent drawbacks. The movie and TV industries have correctly concluded that the standard Pulfrich 3-D implementation is not a useful 3-D technique. Continuously Adjustable Pulfrich Spectacles (CAPS) is a new implementation of the Pulfrich effect that allows any scene containing movement in a standard 2-D movie, which are most scenes, to be optionally viewed in 3-D using inexpensive viewing specs. Recent scientific results in the fields of human perception, optoelectronics, video compression and video format conversion are translated into a new implementation of Pulfrich 3- D. CAPS uses these results to continuously adjust to the movie so that the viewing spectacles always conform to the optical density that optimizes the Pulfrich stereoscopic illusion. CAPS instantly provides 3-D immersion to any moving scene in any 2-D movie. Without the glasses, the movie will appear as a normal 2-D image. CAPS work on any viewing device, and with any distribution medium. CAPS is appropriate for viewing Internet streamed movies in 3-D.

  15. Adjustment disorder: current perspectives

    Directory of Open Access Journals (Sweden)

    Zelviene P

    2018-01-01

    Full Text Available Paulina Zelviene, Evaldas Kazlauskas Department of Clinical and Organizational Psychology, Vilnius University, Vilnius, Lithuania Abstract: Adjustment disorder (AjD is among the most often diagnosed mental disorders in clinical practice. This paper reviews current status of AjD research and discusses scientific and clinical issues associated with AjD. AjD has been included in diagnostic classifications for over 50 years. Still, the diagnostic criteria for AjD remain vague and cause difficulties to mental health professionals. Controversies in definition resulted in the lack of reliable and valid measures of AjD. Epidemiological data on prevalence of AjD is scarce and not reliable because prevalence data are biased by the diagnostic algorithm, which is usually developed for each study, as no established diagnostic standards for AjD are available. Considerable changes in the field of AjD could follow after the release of the 11th edition of International Classification of Diseases (ICD-11. A new AjD symptom profile was introduced in ICD-11 with 2 main symptoms as follows: 1 preoccupation and 2 failure to adapt. However, differences between the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition and ICD-11 AjD diagnostic criteria could result in diverse research findings in the future. The best treatment approach for AjD remains unclear, and further treatment studies are needed to provide AjD treatment guidelines to clinicians. Keywords: adjustment disorder, review, diagnosis, prevalence, treatment, DSM, ICD

  16. Portable thermo-photovoltaic power source

    Science.gov (United States)

    Zuppero, Anthony C.; Krawetz, Barton; Barklund, C. Rodger; Seifert, Gary D.

    1997-01-14

    A miniature thermo-photovoltaic (TPV) device for generation of electrical power for use in portable electronic devices. A TPV power source is constructed to provide a heat source chemical reactor capable of using various fuels, such as liquid hydrocarbons, including but not limited to propane, LPG, butane, alcohols, oils and diesel fuels to generate a source of photons. A reflector dish guides misdirected photon energy from the photon source toward a photovoltaic array. A thin transparent protector sheet is disposed between the photon source and the array to reflect back thermal energy that cannot be converted to electricity, and protect the array from thermal damage. A microlens disposed between the protector sheet and the array further focuses the tailored band of photon energy from the photon source onto an array of photovoltaic cells, whereby the photon energy is converted to electrical power. A heat recuperator removes thermal energy from reactor chamber exhaust gases, preferably using mini- or micro-bellows to force air and fuel past the exhaust gases, and uses the energy to preheat the fuel and oxidant before it reaches the reactor, increasing system efficiency. Mini- or micro-bellows force ambient air through the system both to supply oxidant and to provide cooling. Finally, an insulator, which is preferably a super insulator, is disposed around the TPV power source to reduce fuel consumption, and to keep the TPV power source cool to the touch so it can be used in hand-held devices.

  17. The RAJA Portability Layer: Overview and Status

    Energy Technology Data Exchange (ETDEWEB)

    Hornung, Richard D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Keasler, Jeffrey A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2014-09-24

    As computer architectures become increasingly complex and diverse, application developers face difficult challenges to achieve high performance while maintaining code portability. The problem is especially acute for large ASC multiphysics codes. Efficient parallel execution often requires tuning algorithms and data access to match processor and memory system constraints. Changing compiler directives and parallel programming model constructs on thousands of individual loops in a large code is disruptive and unwieldy. RAJA is a programming approach that we have been developing at Lawrence Livermore National Laboratory to encapsulate platform-specific concerns, related to both hardware and parallel programming models. The RAJA abstraction layer simplifies porting C/C++ codes to various programming models and architectures by reducing effort and developer disruption. In this report, we motivate and describe key aspects of RAJA. We also present a preliminary assessment of RAJA based on exploration in three ASC hydrodynamics codes at LLNL, which was one part of a three-part ASC Level 2 milestone, completed in September 2014.

  18. Portable digital device UHDTV panoramic image formation

    Science.gov (United States)

    Konstantinov, I. S.; Lazarev, S. A.; Rubcov, K. A.; Maslakov, Y. N.

    2017-02-01

    Systems of panoramic photography and video are developed, as a rule, on the basis of an array of light-sensitive sensors, with different ways of positioning in space. The authors developed a high-quality portable system panoramic photo and video using a 12 light-sensitive sensors and the formation of the video standard Ultra HD 4K. According to the simulation results, it was found that the optimal arrangement of 12 the light-sensitive sensors in conjunction with lenses is their location in the center of the dodecahedron faces. In this case, part of the image formed on each photosensitive lens sensor is unique (not repeating other sensors) as part of the panorama of a regular pentagon. This design allows you to create a panorama of 360-degrees. The developed system is a panoramic photo and video, using PLD (programmable logic devices) and includes modules removal of distortions, masking, calibration, image formation on the sphere describing the dodecahedron and obtaining equidistant projection, modules and compression encoding an image. The article presents the basic elements of the developed system of panoramic photography and video.

  19. Editorial: Portable antiquities: archaeology, collecting, metal detecting

    Directory of Open Access Journals (Sweden)

    Suzie Thomas

    2013-03-01

    Full Text Available Metal detecting and archaeology do not always coexist peacefully. Indeed, even in the current climate of participation and inclusion within public and community archaeologies, there are still issues of trust to address, relating to both metal-detector users and archaeologists. While in the UK there have been disagreements between archaeologists and metal-detector users over the years, there have also been some significant steps made in encouraging metal-detector users to cooperate with the archaeological sector. Perhaps the most successful and best known of these is the Portable Antiquities Scheme (PAS, active across England and Wales. Add to this mix those that provide the commercial demand for metal-detected finds, the dealers and private collectors, and a clash of interests and motivations seems inevitable. Most would hope that relationships, positive in many cases but also problematic, will improve, both in the interests of enhancing the recording of non-stratified finds, and of promoting a publicly accessible and inclusive archaeology. However, is this an inevitable progression, or ultimately unachievable?

  20. Portable Handheld Optical Window Inspection Device

    Science.gov (United States)

    Ihlefeld, Curtis; Dokos, Adam; Burns, Bradley

    2010-01-01

    The Portable Handheld Optical Window Inspection Device (PHOWID) is a measurement system for imaging small defects (scratches, pits, micrometeor impacts, and the like) in the field. Designed primarily for window inspection, PHOWID attaches to a smooth surface with suction cups, and raster scans a small area with an optical pen in order to provide a three-dimensional image of the defect. PHOWID consists of a graphical user interface, motor control subsystem, scanning head, and interface electronics, as well as an integrated camera and user display that allows a user to locate minute defects before scanning. Noise levels are on the order of 60 in. (1.5 m). PHOWID allows field measurement of defects that are usually done in the lab. It is small, light, and attaches directly to the test article in any orientation up to vertical. An operator can scan a defect and get useful engineering data in a matter of minutes. There is no need to make a mold impression for later lab analysis.

  1. Portable method of measuring gaseous acetone concentrations.

    Science.gov (United States)

    Worrall, Adam D; Bernstein, Jonathan A; Angelopoulos, Anastasios P

    2013-08-15

    Measurement of acetone in human breath samples has been previously shown to provide significant non-invasive diagnostic insight into the control of a patient's diabetic condition. In patients with diabetes mellitus, the body produces excess amounts of ketones such as acetone, which are then exhaled during respiration. Using various breath analysis methods has allowed for the accurate determination of acetone concentrations in exhaled breath. However, many of these methods require instrumentation and pre-concentration steps not suitable for point-of-care use. We have found that by immobilizing resorcinol reagent into a perfluorosulfonic acid polymer membrane, a controlled organic synthesis reaction occurs with acetone in a dry carrier gas. The immobilized, highly selective product of this reaction (a flavan) is found to produce a visible spectrum color change which could measure acetone concentrations to less than ppm. We here demonstrate how this approach can be used to produce a portable optical sensing device for real-time, non-invasive acetone analysis. Copyright © 2013 Elsevier B.V. All rights reserved.

  2. A Portable Classroom Cosmic Ray Detector

    Science.gov (United States)

    Matis, Howard

    2012-03-01

    Normally, one has to work at an accelerator to demonstrate the principles of particle physics. We have developed a portable cosmic ray detector, the Berkeley Lab Detector, that can bring high energy physics experimentation into the classroom. The detector, which is powered by either batteries or AC power, consists of two scintillator paddles with a printed circuit board. The printed circuit board takes the analog signals from the paddles, compares them, and determines whether the pulses arrived at the same time. It has a visual display and a computer output. The output is compatible with commonly found probes in high schools and colleges. A bright high school student can assemble it. Teachers and students have used a working detector on six of the world's continents. These activities have included cross country trips, science projects, and classroom demonstrations. A complete description can be found at the web site: cosmic.lbl.gov. Besides, basic particle physics, the detector can be used to teach statistics and also to provide an opportunity where students have to determine how much data are taken. In this presentation, we will demonstrate the detector and describe some of the projects that teachers and students have completed with it.

  3. Portable Digital Radiography and Computed Tomography Manual

    Energy Technology Data Exchange (ETDEWEB)

    2007-11-01

    This user manual describes the function and use of the portable digital radiography and computed tomography (DRCT) scanner. The manual gives a general overview of x-ray imaging systems along with a description of the DRCT system. An inventory of the all the system components, organized by shipping container, is also included. In addition, detailed, step-by-step procedures are provided for all of the exercises necessary for a novice user to successfully collect digital radiographs and tomographic images of an object, including instructions on system assembly and detector calibration and system alignment. There is also a short section covering the limited system care and maintenance needs. Descriptions of the included software packages, the DRCT Digital Imager used for system operation, and the DRCT Image Processing Interface used for image viewing and tomographic data reconstruction are given in the appendixes. The appendixes also include a cheat sheet for more experienced users, a listing of known system problems and how to mitigate them, and an inventory check-off sheet suitable for copying and including with the machine for shipment purposes.

  4. Testing and assessment of portable seismic property analyzer.

    Science.gov (United States)

    2014-02-01

    Investigator will thoroughly test and assess the Portable Seismic Property Analyzer (PSPA), a hand-held device that focuses on : pavement layer properties. The device can be utilized on both rigid and flexible pavements. When used on rigid pavements,...

  5. A portable marine geophysical data access and management system

    Digital Repository Service at National Institute of Oceanography (India)

    Kunte, P.D.; Narvekar, P.

    The marine Geophysical Data Access and Management System (GPDAMS) is a portable software system designed for computerized storage, selective retrieval and management of marine geophysical data. It constitutes an integral part of the larger...

  6. Center for Global Health announces grants to support portable technologies

    Science.gov (United States)

    NCI's Center for Global Health announced grants that will support the development and validation of low-cost, portable technologies. These technologies have the potential to improve early detection, diagnosis, and non-invasive or minimally invasive treatm

  7. Portable wireless power transmission system for video capsule endoscopy.

    Science.gov (United States)

    Zhiwei, Jia; Guozheng, Yan; Bingquan, Zhu

    2014-10-01

    Wireless power transmission is considered a practical way of overcoming the power shortage of wireless capsule endoscopy (VCE). However, most patients cannot tolerate the long hours of lying in a fixed transmitting coil during diagnosis. To develop a portable wireless power transmission system for VCE, a compact transmitting coil and a portable inverter circuit driven by rechargeable batteries are proposed. The couple coils, optimized considering the stability and safety conditions, are 28 turns of transmitting coil and six strands of receiving coil. The driven circuit is designed according to the portable principle. Experiments show that the integrated system could continuously supply power to a dual-head VCE for more than 8 h at a frame rate of 30 frames per second with resolution of 320 × 240. The portable VCE exhibits potential for clinical applications, but requires further improvement and tests.

  8. Portable flooring protects finished surfaces, is easily moved

    Science.gov (United States)

    Carmody, R. J.

    1964-01-01

    To protect curved, finished surface and provide support for workmen, portable flooring has been made from rigid plastic foam blocks, faced with aluminum strips. Held together by nylon webbing, the flooring can be rolled up for easy carrying.

  9. Loudness in listening to music with portable headphone stereos.

    Science.gov (United States)

    Kageyama, T

    1999-04-01

    The usual listening levels of music (loudness) using portable headphone stereos were measured for 46 young volunteers. Loudness was associated with sex, Extraversion scores, a subjective mental health state, and impression of the music.

  10. Portable Long-Wavelength Infrared Camera for Civilian Application

    Science.gov (United States)

    Gunapala, S. D.; Krabach, T. N.; Bandara, S. V.; Liu, J. K.

    1997-01-01

    In this paper, we discuss the performance of this portable long-wavelength infrared camera in quantum efficiency, NEAT, minimum resolvable temperature differnce (MRTD), uniformity, etc. and its application in science, medicine and defense.

  11. Advances in Materials and System Technology for Portable Fuel Cells

    Science.gov (United States)

    Narayanan, Sekharipuram R.

    2007-01-01

    This viewgraph presentation describes the materials and systems engineering used for portable fuel cells. The contents include: 1) Portable Power; 2) Technology Solution; 3) Portable Hydrogen Systems; 4) Direct Methanol Fuel Cell; 5) Direct Methanol Fuel Cell System Concept; 6) Overview of DMFC R&D at JPL; 7) 300-Watt Portable Fuel Cell for Army Applications; 8) DMFC units from Smart Fuel Cell Inc, Germany; 9) DMFC Status and Prospects; 10) Challenges; 11) Rapid Screening of Well-Controlled Catalyst Compositions; 12) Screening of Ni-Zr-Pt-Ru alloys; 13) Issues with New Membranes; 14) Membranes With Reduced Methanol Crossover; 15) Stacks; 16) Hybrid DMFC System; 17) Small Compact Systems; 18) Durability; and 19) Stack and System Parameters for Various Applications.

  12. Portable 433 MHz RFQ linac RF system

    Energy Technology Data Exchange (ETDEWEB)

    Vorogushin, M.F. [Efremov Scientific Research Inst. of Electrophysical Apparatus, St. Petersburg (Russian Federation)

    1994-12-31

    Principle and experimental analysis of RF power feed system, based on 3 db directional couplers, for undesirable modes eliminating, divided power coupling with the RFQ accelerating structure, endotron type RF power source matching, are presented. The structure fine tuning and the system adjustment results and high-speed RF autocontrol system design are considered also.

  13. Design criteria for portable timber bridge systems : static versus dynamic loads

    Science.gov (United States)

    John M. Franklin; S. E. Taylor; Paul A. Morgan; M. A. Ritter

    1999-01-01

    Design criteria are needed specifically for portable bridges to insure that they are safe and cost effective. This paper discusses different portable bridge categories and their general design criteria. Specific emphasis is given to quantifying the effects of dynamic live loads on portable bridge design. Results from static and dynamic load tests of two portable timber...

  14. Distributed Control System Design for Portable PC Based CNC Machine

    OpenAIRE

    Saputra, Roni Permana; Atmaja, Tinton Dwi; Prawara, Budi

    2014-01-01

    The demand on automated machining has been increased and emerges improvement research to achieve many goals such as portability, low cost manufacturability, interoperability, and simplicity in machine USAge. These improvements are conducted without ignoring the performance analysis and USAbility evaluation. This research has designed a distributed control system in purpose to control a portable CNC machine. The design consists of main processing unit, secondary processing unit, motor control,...

  15. The FORCE - A highly portable parallel programming language

    Science.gov (United States)

    Jordan, Harry F.; Benten, Muhammad S.; Alaghband, Gita; Jakob, Ruediger

    1989-01-01

    This paper explains why the FORCE parallel programming language is easily portable among six different shared-memory multiprocessors, and how a two-level macro preprocessor makes it possible to hide low-level machine dependencies and to build machine-independent high-level constructs on top of them. These FORCE constructs make it possible to write portable parallel programs largely independent of the number of processes and the specific shared-memory multiprocessor executing them.

  16. The FORCE: A highly portable parallel programming language

    Science.gov (United States)

    Jordan, Harry F.; Benten, Muhammad S.; Alaghband, Gita; Jakob, Ruediger

    1989-01-01

    Here, it is explained why the FORCE parallel programming language is easily portable among six different shared-memory microprocessors, and how a two-level macro preprocessor makes it possible to hide low level machine dependencies and to build machine-independent high level constructs on top of them. These FORCE constructs make it possible to write portable parallel programs largely independent of the number of processes and the specific shared memory multiprocessor executing them.

  17. Treatment of Vestibular Dysfunction Using a Portable Simulator

    Science.gov (United States)

    2015-04-01

    Project Major Goal 1 - Develop a portable stimulator which can be worn continuously and used to improve vestibular function (April 2014 to June 2016...AD______________ AWARD NUMBER: W81XWH-14-2-0012 TITLE: TREATMENT OF VESTIBULAR DYSFUNCTION USING A PORTABLE STIMULATOR PRINCIPAL...hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and

  18. Adjusting to the Emergent

    DEFF Research Database (Denmark)

    Revsbæk, Line

    In her doctoral thesis Line Revsbæk explores newcomer innovation related to organizational entry processes in a changing organization. She introduces process philosophy and complexity theory to research on organizational socialization and newcomer innovation. The study challenges assumptions...... in standardized induction programs where newcomers are cast in roles as insecure novices needing to be “taught the ropes” of the organizational culture. Linked with this, it is suggested that the prevailing dichotomy of ‘newcomer assimilation’ versus ‘organizational accommodation’ is replaced with a notion...... of ‘adjusting to the emergent’. Newcomer innovation is portrayed as carrying a variety of possible significations, such as unintentional innovation effects of newcomer’s proactive self-socializing behavior; an inspirational basis for designing innovation-generating employee induction; ‘resonant instances...

  19. Adjusting to the Emergent

    DEFF Research Database (Denmark)

    Revsbæk, Line

    of ‘adjusting to the emergent’. Newcomer innovation is portrayed as carrying a variety of possible significations, such as unintentional innovation effects of newcomer’s proactive self-socializing behavior; an inspirational basis for designing innovation-generating employee induction; ‘resonant instances......In her doctoral thesis Line Revsbaek explores newcomer innovation related to organizational entry processes in a changing organization. She introduces process philosophy and complexity theory to research on organizational socialization and newcomer innovation. The study challenges assumptions......’ of newcomers enacting the organizational emergent. The study throws light on the informal socialization in work-related interactions between newcomers and veterans and reveals professional relational histories, as well as the relationship between veteran coworker and hiring manager, to be important aspects...

  20. Accuracy of portable devices in measuring peak cough flow.

    Science.gov (United States)

    Kulnik, Stefan Tino; MacBean, Victoria; Birring, Surinder Singh; Moxham, John; Rafferty, Gerrard Francis; Kalra, Lalit

    2015-02-01

    Peak cough flow (PCF) measurements can be used as indicators of cough effectiveness. Portable peak flow meters and spirometers have been used to measure PCF, but little is known about their accuracy compared to pneumotachograph systems. The aim of this study was to compare the accuracy of four portable devices (Mini-Wright and Assess peak flow meters, SpiroUSB and Microlab spirometers) in measuring PCF with a calibrated laboratory based pneumotachograph system. Twenty healthy volunteers (mean (SD) age 45 (16) years) coughed through a pneumotachograph connected in series with each portable device in turn, and the differences in PCF readings were analysed. In addition, mechanically generated flow waves of constant peak flow were delivered through each device both independently and when connected in series with the pneumotachograph. Agreement between PCF readings obtained with the pneumotachograph and the portable devices was poor. Peak flow readings were on average lower by approximately 50 L min(-1) when measured using the portable devices; 95% limits of agreement spanned approximately 150 L min(-1). The findings highlight the potential for inaccuracy when using portable devices for the measurement of PCF. Depending on the measurement instrument used, absolute values of PCF reported in the literature may not be directly comparable.

  1. Bagworm bags as portable armour against invertebrate predators.

    Science.gov (United States)

    Sugiura, Shinji

    2016-01-01

    Some animals have evolved the use of environmental materials as "portable armour" against natural enemies. Portable bags that bagworm larvae (Lepidoptera: Psychidae) construct using their own silk and plant parts are generally believed to play an important role as a physical barrier against natural enemies. However, no experimental studies have tested the importance of bags as portable armour against predators. To clarify the defensive function, I studied the bagworm Eumeta minuscula and a potential predator Calosoma maximoviczi (Coleoptera: Carabidae). Under laboratory conditions, all bagworm larvae were attacked by carabid adults, but successfully defended themselves against the predators' mandibles using their own bags. The portable bags, which are composed mainly of host plant twigs, may function as a physical barrier against predator mandibles. To test this hypothesis, I removed the twig bags and replaced some with herb leaf bags; all bag-removed larvae were easily caught and predated by carabids, while all bag-replaced larvae could successfully defend themselves against carabid attacks. Therefore, various types of portable bags can protect bagworm larvae from carabid attacks. This is the first study to test the defensive function of bagworm portable bags against invertebrate predators.

  2. Bagworm bags as portable armour against invertebrate predators

    Directory of Open Access Journals (Sweden)

    Shinji Sugiura

    2016-02-01

    Full Text Available Some animals have evolved the use of environmental materials as “portable armour” against natural enemies. Portable bags that bagworm larvae (Lepidoptera: Psychidae construct using their own silk and plant parts are generally believed to play an important role as a physical barrier against natural enemies. However, no experimental studies have tested the importance of bags as portable armour against predators. To clarify the defensive function, I studied the bagworm Eumeta minuscula and a potential predator Calosoma maximoviczi (Coleoptera: Carabidae. Under laboratory conditions, all bagworm larvae were attacked by carabid adults, but successfully defended themselves against the predators’ mandibles using their own bags. The portable bags, which are composed mainly of host plant twigs, may function as a physical barrier against predator mandibles. To test this hypothesis, I removed the twig bags and replaced some with herb leaf bags; all bag-removed larvae were easily caught and predated by carabids, while all bag-replaced larvae could successfully defend themselves against carabid attacks. Therefore, various types of portable bags can protect bagworm larvae from carabid attacks. This is the first study to test the defensive function of bagworm portable bags against invertebrate predators.

  3. [Current status and prospects of portable NIR spectrometer].

    Science.gov (United States)

    Yu, Xin-Yang; Lu, Qi-Peng; Gao, Hong-Zhi; Peng, Zhong-Qi

    2013-11-01

    Near-infrared spectroscopy (NIRS) is a reliable, rapid, and non-destructive analytical method widely applied in as a number of fields such as agriculture, food, chemical and oil industry. In order to suit different applications, near-infrared spectrometers are now varied. Portable near-infrared spectrometers are needed for rapid on-site identification and analysis. Instruments of this kind are rugged, compact and easy to be transported. In this paper, the current states of portable near-infrared spectrometers are reviewed. Portable near-infrared spectrometers are built of different monochromator systems: filter, grating, Fourier-transform methods, acousto-optic tunable filter (AOTF) and a large number of new methods based on micro-electro-mechanical systems (MEMS). The first part focuses on working principles of different monochromator systems. Advantages and disadvantages of different systems are also briefly mentioned. Descriptions of each method are given in turn. Typical spectrometers of each kind are introduced, and some parameters of these instruments are listed. In the next part we discuss sampling adapters, display, power supply and some other parts, which are designed to make the spectrometer more portable and easier to use. In the end, the current states of portable near-infrared spectrometers are summarized. Future trends of development of portable near-infrared spectrometers in China and abroad are discussed.

  4. A comparison of the capabilities of portable shearography and portable electronic speckle pattern interferometry

    Science.gov (United States)

    Findeis, Dirk; Gryzagoridis, Jasson

    2004-07-01

    Optical interference techniques such as electronic speckle pattern interferometry (ESPI) and Digital Shearography have been shown to be of great value for the Non-destructive Evaluation of composite materials. The recent signing of a contract to purchase numerous Airbus aircraft for commercial use in South Africa as well as the purchase of the Grippen military aircraft has resulted in the capabilities of optical interference techniques for NDE purposes receiving increased attention. The NDT Laboratory in the Department of Mechanical Engineering at the University of Cape Town has for a number of years been involved with the research, development, and applications of the optical NDE techniques of ESPI and Digital Shearography. This has led to the development of a portable inspection unit, based on Digital Shearography and the latest addition of a portable ESPI prototype. In order to compare the capabilities of the developed prototypes, industry acceptable test specimens of composite aircraft components are subjected to tests using both systems. The results are presented and comparisons are drawn highlighting the advantages and disadvantages of these two optical NDE techniques.

  5. Portable detectors for 125I-insulin absorption measurement during subcutaneous infusion with portable pumps.

    Science.gov (United States)

    Bojsen, J; Kølendorf, K; Deckert, T

    1984-04-01

    Programmed subcutaneous insulin infusion is a promising method for normalisation of the blood glucose concentration in insulin-dependent diabetics. To evaluate insulin availability the absorption rate from the depot is usually measured intermittently by radioactively-labelled insulin and stationary scintillation detectors. Small portable detectors are an alternative, however, and continuous absorption measurements could be made during normal life conditions. Contrary to conventional single injection therapy, the insulin depot initially expands during infusion treatment, changing the geometry during measurements. In the present study the methodological aspects and geometrical dependences were investigated. Simulated studies were made with various plane disc 125I sources in Perspex phantoms as well as 125I-insulin absorption studies in short-term subcutaneous infusion experiments with anaesthetised rabbits. Results from portable, end-window Geiger-Müller (GM) detectors fixed above the depots and close to the surfaces of phantom or skin were compared with results obtained by a conventional stationary NaI(Tl) detector 15 cm from the phantom or skin surface. With a 125I-insulin infusion site at 5 mm depth in the subcutaneous tissue of rabbits, an overall linear proportionality was found between the results obtained with a NaI(Tl) detector and a GM detector raised 15 mm above the skin surface inside the detector housing.

  6. A portable magnetic induction measurement system (PIMS).

    Science.gov (United States)

    Cordes, Axel; Foussier, Jérôme; Pollig, Daniel; Leonhardt, Steffen

    2012-02-22

    For contactless monitoring of ventilation and heart activity, magnetic induction measurements are applicable. As the technique is harmless for the human body, it is well suited for long-term monitoring solutions, e.g., bedside monitoring, monitoring of home care patients, and the monitoring of persons in critical occupations. For such settings, a two-channel portable magnetic induction system has been developed, which is small and light enough to be fitted in a chair or bed. Because demodulation, control, and filtering are implemented on a front-end digital signal processor, a PC is not required (except for visualization/data storage during research and development). The system can be connected to a local area network (LAN) or wireless network (WiFi), allowing to connect several devices to a large monitoring system, e.g., for a residential home for the elderly or a hospital with low-risk patients not requiring standard ECG monitoring. To visualize data streams, a Qt-based (Qt-framework by Nokia, Espoo, Finland) monitoring application has been developed, which runs on Netbook computers, laptops, or standard PCs. To induce and measure the magnetic fields, external coils and amplifiers are required. This article describes the system and presents results for monitoring respiration and heart activity in a (divan) bed and for respiration monitoring in a chair. Planar configurations and orthogonal coil setups were examined during the measurement procedures. The measurement data were streamed over a LAN to a monitoring PC running Matlab (The MathWorks Inc, Natick, MA, USA).

  7. Software for portable laser light show system

    Science.gov (United States)

    Buruchin, Dmitrey J.; Leonov, Alexander F.

    1995-04-01

    Portable laser light show system LS-3500-10M is connected to the parallel port of IBM PC/AT compatible computer. Computer performs output of digital control data describing images. Specially designed control device is used to convert digital data coming from parallel port to the analog signal driving scanner. Capabilities of even cost nothing 286 computer are quite enough for laser graphics control. Technology of scanning used in laser graphics system LS-3500-10M essentially differs from widely spread systems based on galvanometers with mobile core or with mobile magnet. Such devices are based on the same principle of work as electrically driven servo-mechanism. As scanner we use elastic system with hydraulic dampen oscillations and opened loop. For most of applications of laser graphics such system provides satisfactory precision and speed of scanning. LS-3500-10M software gives user ability to create on PC and play his own laser graphics demonstrations. It is possible to render recognizable text and pictures using different styles, 3D and abstract animation. All types of demonstrations can be mixed in slide-show. Time synchronization is supported. Software has the following features: (1) Different types of text output. Built-in text editor for typing and editing of textural information. Different fonts can be used to display text. User can create his own fonts using specially developed font editor. (2) Editor of 3D animation with library of predefined shapes. (3) Abstract animation provided by software routines. (4) Support of different graphics files formats (PCX or DXF). Original algorithm of raster image tracing was implemented. (5) Built-in slide-show editor.

  8. Portable meters for nutritional assessment in plants of gerbera fertigated with electrical conductivity levels

    Directory of Open Access Journals (Sweden)

    Poliana R. D'A. Mota

    2014-03-01

    Full Text Available Rapid tests to assess the nutritional status of plants gerbera can make easier the decision of any adjustments in the fertilization of the substrate. The study was conducted to evaluate nutritionally fertigated gerbera plants with increasing levels of electrical conductivity (EC, using portable meters nitrate and potassium, and chlorophyll. For this, two experiments were conducted. A randomized block design with five levels of EC (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1 and four replications was used. Cherry cultivar was used in the first experiment. In the second experiment, two cultivars (Cherry and Salmon Rose were used. In the first experiment, the sap of the leaves was subjected to rapid testing of N-NO3- (equipment Cardy Horiba C -141. N-NO3- and K+ (C-131 were determined in the substrate solution. The intensity of the green leaf, in the second experiment was evaluated with portable Chlorophyll Meter. The N content in the indicator leaf in the first and N and K contents in the plant in the second experiment were determined. Rapid tests are presented as good indicators of the level of N-NO3- and K+ in plant tissue, with the advantages of convenience and speed of determination, facilitating monitoring of fertilization of the substrate by producers and technicians.

  9. Low-Interference Dual Resonant Antenna Configurations for Multistandard Multifunction Handsets and Portable Computers

    Directory of Open Access Journals (Sweden)

    Mohamed Sanad

    2012-01-01

    Full Text Available Low-interference dual resonant antenna configurations are developed for multistandard multifunction mobile handsets and portable computers. Only two wideband resonant antennas can cover most of the important wireless applications in portable communication equipment. The frequency bands of the dual antenna configuration can be adjusted according to the wireless applications that are required to be covered. The bandwidth that can be covered by each antenna is about 80% without using matching or tuning circuits. Three sample dual antenna configurations with different frequency bands are presented. The interference between the low-band and high-band antennas of these three configurations is investigated, and the ways of reducing this interference are studied. The most effective factor on the interference between the low-band and high-band antennas is their relative orientations. When the low-band and high-band antennas of each configuration are perpendicular to each other, the isolation between them significantly increases. This eliminates the need for any special tools or techniques to suppress the mutual coupling between them. The new antennas have very small cross-sectional areas, and they are made of a flexible material. They do not require any additional components or ground planes. They can be used as internal, external, or partially internal and partially external antennas.

  10. Recent progress in single sided gamma-ray tomography

    Energy Technology Data Exchange (ETDEWEB)

    Thoe, R.S.

    1994-04-01

    The use of scattered radiation for radiography has many potential advantages over conventional projection techniques: For high energy photons the scattering process strongly dominates all other processes. The intensity of scattered radiation is due directly to the electron density and highly insensitive to chemical composition. Finally, the use of scattered radiation allows the investigator to position the radiation source-on-the same side of the object as the detector. In this paper I will present some recent results of a set of measurements made with our uncollimated Compton backscattering tomography apparatus. This technique uses the Compton energy shift of scattered gamma rays to determine the scattering site. By measuring the spectrum of these scattered gamma rays it is then possible to determine the electron density of the object being investigated. I will give a brief description of the apparatus and present the results of numerous measurements made on a brass phantom with voids placed at various depths. These results imply that for this crude apparatus occlusions as small as one cubic millimeter may be located to an accuracy of about one millimeter at depths of about 15 millimeters in solid brass.

  11. Unified double- and single-sided homogeneous Green's function representations

    NARCIS (Netherlands)

    Wapenaar, C.P.A.; van der Neut, J.R.; Slob, E.C.

    2016-01-01

    In wave theory, the homogeneous Green’s function consists of the impulse response to a point source, minus its time-reversal. It can be represented by a closed boundary integral. In many practical situations, the closed boundary integral needs to be approximated by an open boundary integral because

  12. [The result of BAHA fitting in single sided deafness].

    Science.gov (United States)

    Tao, Yong; Li, Gang; Zheng, Yun; Wang, Kai; Meng, Zhaoli; Xu, Ke

    2013-01-01

    To learn the benefit of the unilateral profound sensorineural hearing loss patients wear bone conduction hearing aid BAHA. Sixteen unilateral profound sensorineural hearing loss patients done BAHA aided pure tone test and speech recognition threshold test in the quiet environment and MHINT test respectively. We can learn the effect of wearing BAHA by doing the unaided and aided speech recognition threshold test in different environment. BAHA had good compensation of aided threshold but have no obvious im prove of speech recognition threshold both in quiet and noise environment. According to the research and feedback of patients, BAHA have no obvious benefit to unilateral profound hearing loss. The related benefit test should he done first before deciding whether or not to implant BAHA. The long-term BAHA wearing benefit still need to further understand with unilateral profound sensorineural hearing loss patients.

  13. Single-sided Marchenko focusing of compressional and shear waves

    NARCIS (Netherlands)

    Wapenaar, C.P.A.

    2014-01-01

    In time-reversal acoustics, waves recorded at the boundary of a strongly scattering medium are sent back into the medium to focus at the original source position. This requires that the medium can be accessed from all sides. We discuss a focusing method for media that can be accessed from one side

  14. Development of a Portable Muon Witness System

    Energy Technology Data Exchange (ETDEWEB)

    Aguayo Navarrete, Estanislao; Kouzes, Richard T.; Orrell, John L.

    2011-01-01

    associated electronics to measure energy depositions in coincidence in the two paddles. For this particular application of the prototype, the measurements performed concentrated on a broad investigation of the dependence of the muon flux on depth underground. These tests were conducted inside at Building 3420/1307 and underground at Building 3425 at the Pacific Northwest National Laboratory. The second half of this report analyzes modifications to the electronics of the BLCRD to make this detector portable. Among other modifications, a battery powered version of these electronics is proposed for the final Muon Witness design.

  15. Instrumentation for hand-portable liquid chromatography.

    Science.gov (United States)

    Sharma, Sonika; Plistil, Alex; Simpson, Robert S; Liu, Kun; Farnsworth, Paul B; Stearns, Stanley D; Lee, Milton L

    2014-01-31

    Liquid chromatography (LC) has lagged behind gas chromatography (GC) in developments related to hand-portable instrumentation. In this work, a new battery-operated (24V DC) nano-flow pumping system with a stop-flow injector was developed and integrated with an on-column UV-absorption detector (254nm) that was reduced in size to an acceptable weight and power usage for field operation. The pumping system, which includes nano-flow pump, stepper motor and high-pressure valve weighs only 1.372kg (3lbs) and can generate up to 110.32MPa (16,000psi) pressure. A major advantage of this pump is that it does not employ a splitter, since it was specifically designed for capillary column use. The volume capacity of the pump is 24μL, and a sample volume as low as 10nL can be injected. Flow rate calibration (300nL to 6.12μL per min) was performed, and an accuracy >99.94% was obtained. The percent injection carry-over was found to be low (RSD 0.31%), which makes it practical for quantitative analysis. The detector linear range and limit of detection (LOD) were determined using sodium anthraquinone-2-sulfonate. A linear regression coefficient (R) of 0.9996 was obtained for a plot of log peak area versus log concentration over the range of 3.2μM to 6.5mM, and the LOD (S/N=3) was found to be 7.8fmol (0.13μM). The short term noise of the detector is comparable to commercially available detectors (∼10(-5)AU). In this work, the system was tested in the laboratory using regular line power (120V AC) with an AC to DC adapter. Reversed-phase isocratic separations were performed using a 15.5cm×75μm i.d. fused silica capillary column containing a monolithic stationary phase synthesized from 1,6-hexanediol dimethacrylate. Good retention time repeatability (RSD 0.09-0.74%) was obtained for a mixture containing an unretained marker (i.e., uracil) and a homologous series of alkyl benzenes. Copyright © 2013 Elsevier B.V. All rights reserved.

  16. Portable Tablets in Science Museum Learning: Options and Obstacles

    Science.gov (United States)

    Gronemann, Sigurd Trolle

    2017-06-01

    Despite the increasing use of portable tablets in learning, their impact has received little attention in research. In five different projects, this media-ethnographic and design-based analysis of the use of portable tablets as a learning resource in science museums investigates how young people's learning with portable tablets matches the intentions of the museums. By applying media and information literacy (MIL) components as analytical dimensions, a pattern of discrepancies between young people's expectations, their actual learning and the museums' approaches to framing such learning is identified. It is argued that, paradoxically, museums' decisions to innovate by introducing new technologies, such as portable tablets, and new pedagogies to support them conflict with many young people's traditional ideas of museums and learning. The assessment of the implications of museums' integration of portable tablets indicates that in making pedagogical transformations to accommodate new technologies, museums risk opposing didactic intention if pedagogies do not sufficiently attend to young learners' systemic expectations to learning and to their expectations to the digital experience influenced by their leisure use.

  17. A portable wireless power transmission system for video capsule endoscopes.

    Science.gov (United States)

    Shi, Yu; Yan, Guozheng; Zhu, Bingquan; Liu, Gang

    2015-01-01

    Wireless power transmission (WPT) technology can solve the energy shortage problem of the video capsule endoscope (VCE) powered by button batteries, but the fixed platform limited its clinical application. This paper presents a portable WPT system for VCE. Besides portability, power transfer efficiency and stability are considered as the main indexes of optimization design of the system, which consists of the transmitting coil structure, portable control box, operating frequency, magnetic core and winding of receiving coil. Upon the above principles, the correlation parameters are measured, compared and chosen. Finally, through experiments on the platform, the methods are tested and evaluated. In the gastrointestinal tract of small pig, the VCE is supplied with sufficient energy by the WPT system, and the energy conversion efficiency is 2.8%. The video obtained is clear with a resolution of 320×240 and a frame rate of 30 frames per second. The experiments verify the feasibility of design scheme, and further improvement direction is discussed.

  18. A Portable Piezoelectric Tactile Terminal for Braille Readers

    Directory of Open Access Journals (Sweden)

    Ramiro Velázquez

    2012-01-01

    Full Text Available This paper introduces a novel concept on reading assistive technologies for the blind: the TactoBook, a system that is able to translate entire electronic books (eBooks to Braille code and to reproduce them in portable electronic Braille terminals. The TactoBook consists of a computer-based translator that converts fast and automatically any eBook into Braille. The Braille version of the eBook is then encrypted as a file and stored in a USB memory drive which is later inserted and reproduced in a compact, lightweight, and highly-portable tactile terminal. In particular, this paper presents a piezoelectric ultrasonic actuation approach to design and implement such portable Braille terminal. Actuating mechanism, design concept, first prototype, and performance results are presented and discussed.

  19. Game Portability Using a Service-Oriented Approach

    Directory of Open Access Journals (Sweden)

    Ahmed BinSubaih

    2008-01-01

    Full Text Available Game assets are portable between games. The games themselves are, however, dependent on the game engine they were developed on. Middleware has attempted to address this by, for instance, separating out the AI from the core game engine. Our work takes this further by separating the game from the game engine, and making it portable between game engines. The game elements that we make portable are the game logic, the object model, and the game state, which represent the game's brain, and which we collectively refer to as the game factor, or G-factor. We achieve this using an architecture based around a service-oriented approach. We present an overview of this architecture and its use in developing games. The evaluation demonstrates that the architecture does not affect performance unduly, adds little development overhead, is scaleable, and supports modifiability.

  20. Compact direct methanol fuel cells for portable application

    Science.gov (United States)

    Icardi, U. A.; Specchia, S.; Fontana, G. J. R.; Saracco, G.; Specchia, V.

    Consumers' demand for portable audio/video/ICT products has driven the development of advanced power technologies in recent years. Fuel cells are a clean technology with low emissions levels, suitable for operation with renewable fuels and capable, in a next future, of replacing conventional power systems meeting the targets of the Kyoto Protocol for a society based on sustainable energy systems. Within such a perspective, the objective of the European project MOREPOWER (compact direct methanol fuel cells for portable applications) is the development of a low-cost, low temperature, portable direct methanol fuel cell (DMFC; nominal power 250 W) with compact construction and modular design for the potential market area of weather stations, medical devices, signal units, gas sensors and security cameras. This investigation is focused on a conceptual study of the DMFC system carried out in the Matlab/Simulink ® platform: the proposed scheme arrangements lead to a simple equipment architecture and a efficient process.

  1. Smart Woven Fabrics With Portable And Wearable Vibrating Electronics

    Directory of Open Access Journals (Sweden)

    Özdemir Hakan

    2015-06-01

    Full Text Available The portable and wearable instrumented fabrics capable of measuring biothermal variable is essential for drivers, especially long-distance drivers. Here we report on portable and wearable devices that are able to read the temperature of human body within the woven fabric. The sensory function of the fabric is achieved by temperature sensors, soldered on conductive threads coated with cotton. The presence of stainless steel wires gives these materials conductive properties, enabling the detection of human body temperature and transmitting the signal form sensors to the motors on the fabric. When body temperature decreases, hardware/software platforms send a signal to the vibration motors in order to stimulate the driver. The ‘smart woven fabric’-sensing architecture can be divided into two parts: a textile platform, where portable and wearable devices acquire thermal signals, and hardware/software platforms, to which a sensor sends the acquired data, which send the signals to the vibration motors.

  2. A portable 12-wavelength parallel near-infrared spectral tomography (NIRST) system for efficient characterization of breast cancer during neoadjuvant chemotherapy

    Science.gov (United States)

    Zhao, Yan; Burger, William R.; Zhou, Mingwei; Pogue, Brian W.; Paulsen, Keith D.; Jiang, Shudong

    2017-02-01

    A portable, 12-wavelength hybrid frequency domain (FD) and continuous wave (CW) near-infrared spectral tomography (NIRST) system was developed for efficient characterization of breast cancer in a clinical oncology setting. Two sets of three FD and three CW measurements were acquired simultaneously. The imaging time was reduced from 90 to 55 seconds with a new gain adjustment scheme of the optical detector. The study of integrating this system into the workflow of clinical oncology practice is ongoing.

  3. Psychological adjustment to chronic disease.

    Science.gov (United States)

    de Ridder, Denise; Geenen, Rinie; Kuijer, Roeline; van Middendorp, Henriët

    2008-07-19

    This Review discusses physiological, emotional, behavioural, and cognitive aspects of psychological adjustment to chronic illness. Reviewing the reports of the past decade, we identify four innovative and promising themes that are relevant for understanding and explaining psychological adjustment. In particular, the emphasis on the reasons why people fail to achieve a healthy adjustment has shifted to the identification of factors that help patients make that adjustment. To promote psychological adjustment, patients should remain as active as is reasonably possible, acknowledge and express their emotions in a way that allows them to take control of their lives, engage in self-management, and try to focus on potential positive outcomes of their illness. Patients who can use these strategies have the best chance of successfully adjusting to the challenges posed by a chronic illness.

  4. Metric-adjusted skew information

    DEFF Research Database (Denmark)

    Liang, Cai; Hansen, Frank

    2010-01-01

    We give a truly elementary proof of the convexity of metric-adjusted skew information following an idea of Effros. We extend earlier results of weak forms of superadditivity to general metric-adjusted skew information. Recently, Luo and Zhang introduced the notion of semi-quantum states...... on a bipartite system and proved superadditivity of the Wigner-Yanase-Dyson skew informations for such states. We extend this result to the general metric-adjusted skew information. We finally show that a recently introduced extension to parameter values 1 information is a special case...... of (unbounded) metric-adjusted skew information....

  5. Adjustment computations spatial data analysis

    CERN Document Server

    Ghilani, Charles D

    2011-01-01

    the complete guide to adjusting for measurement error-expanded and updated no measurement is ever exact. Adjustment Computations updates a classic, definitive text on surveying with the latest methodologies and tools for analyzing and adjusting errors with a focus on least squares adjustments, the most rigorous methodology available and the one on which accuracy standards for surveys are based. This extensively updated Fifth Edition shares new information on advances in modern software and GNSS-acquired data. Expanded sections offer a greater amount of computable problems and their worked solu

  6. Hand-held portable microarray reader for biodetection

    Science.gov (United States)

    Thompson, Deanna Lynn; Coleman, Matthew A; Lane, Stephen M; Matthews, Dennis L; Albala, Joanna; Wachsmann-Hogiu, Sebastian

    2013-04-23

    A hand-held portable microarray reader for biodetection includes a microarray reader engineered to be small enough for portable applications. The invention includes a high-powered light-emitting diode that emits excitation light, an excitation filter positioned to receive the excitation light, a slide, a slide holder assembly for positioning the slide to receive the excitation light from the excitation filter, an emission filter positioned to receive the excitation light from the slide, a lens positioned to receive the excitation light from the emission filter, and a CCD camera positioned to receive the excitation light from the lens.

  7. Portable Deep-Ultraviolet (DUV) Raman for Standoff Detection.

    Science.gov (United States)

    Hopkins, Adam J; Cooper, Justin L; Profeta, Luisa T M; Ford, Alan R

    2016-05-01

    Alakai Defense Systems has recently developed a man-portable ultraviolet Raman spectrometer system. The portable Raman improvised explosives detector was designed to provide rapid, standoff detection of chemicals of interest to the end user, including, but not limited to explosives, narcotics, toxic industrial chemicals, and toxic industrial materials. In this paper, we discuss general aspects of the system design and user interface. Spectral and instrument performance data are shown for several common materials involved in narcotics manufacture, as well as cocaine and heroin, with comparisons to currently marketed handheld Raman instruments. © The Author(s) 2016.

  8. Performance and portability of the SciBy virtual machine

    DEFF Research Database (Denmark)

    Andersen, Rasmus; Vinter, Brian

    2010-01-01

    The Scientific Bytecode Virtual Machine is a virtual machine designed specifically for performance, security, and portability of scientific applications deployed in a Grid environment. The performance overhead normally incurred by virtual machines is mitigated using native optimized scientific...... libraries, security is obtained by sandboxing techniques. Lastly, by executing platform-independent bytecodes, the machine is highly portable. To evaluate the machine, we demonstrate several use-case scenarios from some of the intended application domains. Further, we show the ease of porting the machine...

  9. Portable music player users: Cultural differences and potential dangers

    Directory of Open Access Journals (Sweden)

    Sandra Levey

    2013-01-01

    Full Text Available Many studies have examined the use of portable music players portable listening devices (PLDs from various ethnic groups. Some findings suggest that there may be differences among ethnic groups that lead to louder or longer listening when using PLD devices. For example, some studies found that Hispanic PLD users listen at higher volume levels while other studies found that African American PLD users listen at higher volume levels. No investigator has explained the reasons for differences among ethnic groups in listening intensity. This paper will address the possible reasons for these differences and offer guidelines for the prevention of noise-induced hearing loss.

  10. Portable music player users: cultural differences and potential dangers.

    Science.gov (United States)

    Levey, Sandra; Fligor, Brian J; Cutler, Cecelia; Harushimana, Immaculee

    2013-01-01

    Many studies have examined the use of portable music players portable listening devices (PLDs) from various ethnic groups. Some findings suggest that there may be differences among ethnic groups that lead to louder or longer listening when using PLD devices. For example, some studies found that Hispanic PLD users listen at higher volume levels while other studies found that African American PLD users listen at higher volume levels. No investigator has explained the reasons for differences among ethnic groups in listening intensity. This paper will address the possible reasons for these differences and offer guidelines for the prevention of noise-induced hearing loss.

  11. Portable computerized tester improves flight-line maintenance

    Science.gov (United States)

    Grinberg, Y.

    1985-11-01

    The present general purpose and portable Computerized Organizational Level Tester (COLT) for the flight-line maintenance of advanced weapons systems is in effect a fully functioning replica of contemporary automated test equipment architectures previously available only in laboratory test installations. The COLT's automated equipment architecture has been scaled down to a ruggedized, portable, suitcase-sized field tester for both analog and digital equipment. Tester software is designed to minimize programming effort, and possesses a real time executive kernel which transparently interfaces high level user commands with tester hardware. Automatic software-generation tools are incorporated.

  12. Installation guide to mpich, a portable implementation of MPI

    Energy Technology Data Exchange (ETDEWEB)

    Gropp, W.; Lusk, E.

    1996-07-01

    MPI (Message Passing Interface) is a standard specification for message-passing libraries. mpich is a portable implementation of the full MPI specification for a wide variety of parallel computing environments, including workstation clusters and massively parallel processors. mpich contains, along with the MPI library itself, a programming environment for working with MPI programs. The programming environment includes a portable startup mechanism, several profiling libraries for studying the performance of MPI programs, and an X interface to all of the tools. This guide explains how to compile, test, and install mpich and its related tools.

  13. Perfectionsism, Coping, and Emotional Adjustment.

    Science.gov (United States)

    Rice, Kenneth G.; Lapsley, Daniel K.

    2001-01-01

    Undergraduates (N=204) completed three scales of the student adaptation to college questionnaire. Measures of coping and emotional adjustment revealed differences among the three groups of students labeled adaptive, maladaptive, and non-perfectionists. Perfectionism and coping predicted emotional adjustment but coping as a moderator or mediator in…

  14. Convexity Adjustments for ATS Models

    DEFF Research Database (Denmark)

    Murgoci, Agatha; Gaspar, Raquel M.

    formulas. Concretely for LIBOR in arrears (LIA) contracts, we derive the system of Riccatti ODE-s one needs to compute to obtain the exact adjustment. Based upon the ideas of Schrager and Pelsser (2006) we are also able to derive general swap adjustments useful, in particular, when dealing with constant...

  15. Spousal Adjustment to Myocardial Infarction.

    Science.gov (United States)

    Ziglar, Elisa J.

    This paper reviews the literature on the stresses and coping strategies of spouses of patients with myocardial infarction (MI). It attempts to identify specific problem areas of adjustment for the spouse and to explore the effects of spousal adjustment on patient recovery. Chapter one provides an overview of the importance in examining the…

  16. Self-Contained Portable Data Acquisition/Control System Unit for Hydrogen Environments Project

    Data.gov (United States)

    National Aeronautics and Space Administration — An independent portable equipment platform was designed to house a wide variety of electrical equipment encased into a self-contained portable enclosure unit, which...

  17. 77 FR 70464 - Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data...

    Science.gov (United States)

    2012-11-26

    ... From the Federal Register Online via the Government Publishing Office INTERNATIONAL TRADE COMMISSION Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data... importation of certain electronic devices, including wireless communication devices, portable music and data...

  18. 78 FR 16865 - Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data...

    Science.gov (United States)

    2013-03-19

    ... From the Federal Register Online via the Government Publishing Office INTERNATIONAL TRADE COMMISSION Certain Electronic Devices, Including Wireless Communication Devices, Portable Music and Data... importation of certain electronic devices, including wireless communication devices, portable music and data...

  19. 77 FR 60720 - Certain Electronic Devices, Including Wireless Commmunication Devices, Portable Music and Data...

    Science.gov (United States)

    2012-10-04

    ... From the Federal Register Online via the Government Publishing Office INTERNATIONAL TRADE COMMISSION Certain Electronic Devices, Including Wireless Commmunication Devices, Portable Music and Data... infringing electronic devices, including wireless communication devices, portable music and data processing...

  20. 77 FR 51571 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers...

    Science.gov (United States)

    2012-08-24

    ... COMMISSION Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers, and... communication devices, portable music and data processing devices, computers, and components thereof. The... and Data Processing Devices, Computers, and Components Thereof, DN 2910; the Commission is soliciting...

  1. CAMEX-4 NASA PORTABLE S-BAND MULTIPARAMETER WX RESEARCH RADAR V1

    Data.gov (United States)

    National Aeronautics and Space Administration — The CAMEX-4 NASA Portable S-Band Multiparameter WX Research Radar dataset was collected by the NASA Portable S-band Multiparameter Weather Research Radar (NPOL),...

  2. 75 FR 52034 - Portable Fire Extinguishers (Annual Maintenance Certification Record); Extension of the Office of...

    Science.gov (United States)

    2010-08-24

    ... Occupational Safety and Health Administration Portable Fire Extinguishers (Annual Maintenance Certification... Fire Extinguishers Standard (Annual Maintenance Certification Record) (29 CFR 1910.157(e)(3)). DATES... Standard specifies that employers must subject each portable fire extinguisher to an annual maintenance...

  3. Calculations of skyshine from an intense portable electron linac

    Energy Technology Data Exchange (ETDEWEB)

    Estes, G.P.; Hughes, H.G.; Fry, D.A.; Haynie, J.S. [Los Alamos National Lab., NM (United States); Shaughnessy, C.H.

    1994-12-31

    The MCNP Monte carlo code has been used at Los Alamos to calculate skyshine and terrain albedo efects from an intense portable electron linear accelerator that is to be used by the Russian Federation to radiograph nuclear weapons that may have been damaged by accidents. Relative dose rate profiles have been calculated. The design of the accelerator, along with a diagram, is presented.

  4. fpga controller design and simulation of a portable dough mixing

    African Journals Online (AJOL)

    trols can now be integrated into portable embedded household electronic systems. In this paper .... The Control of DCM and power electronics ..... achieved when the sensed speed equals refer- ence speed and error signal (e) given by equa- tion (12) equals zero. ef = Vr − Vf. (12). In Figure 10(a) and (b), a rotating slotted.

  5. Portable concrete barrier condition and transition plan synthesis.

    Science.gov (United States)

    2012-06-01

    Precast (or portable) Concrete Barrier (PCB) is a guardrail system that is intended to contain and redirect a vehicle that has left the travel lane. Barrier connections are typically formed using steel wire or bar to form loops which are joined by a ...

  6. 29 CFR 1918.24 - Fixed and portable ladders.

    Science.gov (United States)

    2010-07-01

    ... combination ladders, self-supporting ladders shall not be used as single straight ladders. (4) Unless intended for cantilever operation, non-self-supporting ladders shall not be used to climb above the top support... manufactured portable ladders obtained before January 21, 1998 shall be capable of supporting a 200-pound (890...

  7. Contamination of successive samples in portable pumping systems

    Science.gov (United States)

    Robert B. Thomas; Rand E. Eads

    1983-01-01

    Automatic discrete sample pumping systems used to monitor water quality should deliver to storage all materials pumped in a given cycle. If they do not, successive samples will be contaminated, a severe problem with highly variable suspended sediment concentrations in small streams. The cross-contamination characteristics of two small commonly used portable pumping...

  8. State-of-Charge Indication in Portable Applications

    NARCIS (Netherlands)

    Pop, V.; Bergveld, H.J.; Notten, P.H.L.; Regtien, Paulus P.L.

    2005-01-01

    The known methods of state-of-charge (SoC) indication in portable applications are not accurate enough under all practical conditions. The method presented in this paper aims at designing and testing an SoC indication system capable of predicting the remaining capacity of the battery and the

  9. Mobile number portability in Ghana: six years of customer satisfaction

    African Journals Online (AJOL)

    ... subscribers who claimed that it was long overdue. Additionally, the study found that the duration for porting from one network to another had improved significantly compared to the nascent stages when it could take days. Keywords: Mobile Number Portability, Ghana, Cellular Communications, Telco, Number Porting, NCA ...

  10. Accuracy of a portable haemoglobinometer in clinical practice ...

    African Journals Online (AJOL)

    The haemoglobin (Hb) levels of 100 blood samples submitted to the haematology laboratory of Groote Schuur Hospital were estimated by 3 clinical observers using the Buffalo Medical Specialties (BMS) portable haemoglobinometer. The average error was between 5% and 6% of the laboratory Hb value (0,6 g/dl).

  11. AN IMPROVED PORTABLE SURGICAL TABLE FOR THE FIELD AND LABORATORY

    Science.gov (United States)

    I substantially modified a portable surgical table design by Courtois (1981) to increase its durability and utility. The new design incorporated durable plastic components, a nonskid neoprene surgery surface, and surgical tool bins. The system was used to implant fish and amphibi...

  12. Predicting aged pork quality using a portable raman device

    Science.gov (United States)

    Objectives: A need exists for a better on-line evaluation method for pork quality. Raman spectroscopy evaluates structure and composition of food samples, with advantage of being portable, non-invasive and insensitive to water. The objectives of this study were to evaluate the correlation between Ra...

  13. Portable Thermoelectric Power Generator Coupled with Phase Change Material

    Directory of Open Access Journals (Sweden)

    Lim Chong C.

    2014-07-01

    Full Text Available Solar is the intermittent source of renewable energy and all thermal solar systems having a setback on non-functioning during the night and cloudy environment. This paper presents alternative solution for power generation using thermoelectric which is the direct conversion of temperature gradient of hot side and cold side of thermoelectric material to electric voltage. Phase change material with latent heat effect would help to prolong the temperature gradient across thermoelectric material for power generation. Besides, the concept of portability will enable different power source like solar, wasted heat from air conditioner, refrigerator, stove etc, i.e. to create temperature different on thermoelectric material for power generation. Furthermore, thermoelectric will generate direct current which is used by all the gadgets like Smartphone, tablet, laptop etc. The portable concept of renewable energy will encourage the direct usage of renewable energy for portable gadgets. The working principle and design of portable thermoelectric power generator coupled with phase change material is presented in this paper.

  14. Portable acquisition device AREVA; Dispositivo de adquisicion portatil de AREVA

    Energy Technology Data Exchange (ETDEWEB)

    Martin, H.; Izquierdo, J.

    2013-07-01

    The portable device of AREVA data acquisition arises as a solution to a need for modernization and updating of instrumentation tools and control which makes it more reliable, manageable and useful the data collection and further treatment, with an objective to minimize human error and effort, improving widely of course times.

  15. A portable fNIRS system with eight channels

    Science.gov (United States)

    Si, Juanning; Zhao, Ruirui; Zhang, Yujin; Zuo, Nianming; Zhang, Xin; Jiang, Tianzi

    2015-03-01

    Abundant study on the hemodynamic response of a brain have brought quite a few advances in technologies of measuring it. The most benefitted is the functional near infrared spectroscope (fNIRS). A variety of devices have been developed for different applications. Because portable fNIRS systems were more competent to measure responses either of special subjects or in natural environment, several kinds of portable fNIRS systems have been reported. However, they all required a computer for receiving data. The extra computer increases the cost of a fNIRS system. What's more noticeable is the space required to locate the computer even for a portable system. It will discount the portability of the fNIRS system. So we designed a self-contained eight channel fNIRS system, which does not demand a computer to receive data and display data in a monitor. Instead, the system is centered by an ARM core CPU, which takes charge in organizing data and saving data, and then displays data on a touch screen. The system has also been validated by experiments on phantoms and on subjects in tasks.

  16. Small Portable PEM Fuel Cell Systems for NASA Exploration Missions

    Science.gov (United States)

    Burke, Kenneth A.

    2005-01-01

    Oxygen-Hydrogen PEM-based fuel cell systems are being examined as a portable power source alternative in addition to advanced battery technology. Fuel cell power systems have been used by the Gemini, Apollo, and Space Shuttle programs. These systems have not been portable, but have been integral parts of their spacecraft, and have used reactants from a separate cryogenic supply. These systems typically have been higher in power. They also have had significant ancillary equipment sections that perform the pumping of reactants and coolant through the fuel cell stack and the separation of the product water from the unused reactant streams. The design of small portable fuel cell systems will be a significant departure from these previous designs. These smaller designs will have very limited ancillary equipment, relying on passive techniques for reactant and thermal management, and the reactant storage will be an integral part of the fuel cell system. An analysis of the mass and volume for small portable fuel cell systems was done to evaluate and quantify areas of technological improvement. A review of current fuel cell technology as well as reactant storage and management technology was completed to validate the analysis and to identify technology challenges

  17. A portable fluorescent sensing system using multiple LEDs

    Science.gov (United States)

    Shin, Young-Ho; Barnett, Jonathan Z.; Gutierrez-Wing, M. Teresa; Rusch, Kelly A.; Choi, Jin-Woo

    2017-02-01

    This paper presents a portable fluorescent sensing system that utilizes different light emitting diode (LED) excitation lights for multiple target detection. In order to identify different analytes, three different wavelengths (385 nm, 448 nm, and 590 nm) of excitation light emitting diodes were used to selectively stimulate the target analytes. A highly sensitive silicon photomultiplier (SiPM) was used to detect corresponding fluorescent signals from each analyte. Based on the unique fluorescent response of each analyte, it is possible to simultaneously differentiate one analyte from the other in a mixture of target analytes. A portable system was designed and fabricated consisting of a display module, battery, data storage card, and sample loading tray into a compact 3D-printed jig. The portable sensor system was demonstrated for quantification and differentiation of microalgae (Chlorella vulgaris) and cyanobacteria (Spirulina) by measuring fluorescent responses of chlorophyll a in microalgae and phycocyanin in cyanobacteria. Obtained results suggest that the developed portable sensor system could be used as a generic fluorescence sensor platform for on-site detection of multiple analytes of interest.

  18. Portable devices for delivering imagery and modelling interventions ...

    African Journals Online (AJOL)

    The main objective of this study was to investigate the effectiveness of portable devices (MP4) and a stationary device (DVD and fixed point stationary computer) in delivering imagery and modelling training among female netball players, examining the effect on imagery adherence, performance, self-efficacy, and the relative ...

  19. Portable Remote Imaging Spectrometer (PRISM): laboratory and field calibration

    Science.gov (United States)

    Mouroulis, Pantazis; Van Gorp, Byron; Green, Robert O.; Eastwood, Michael; Boardman, Joseph; Richardson, Brandon S.; Rodriguez, Jose I.; Urquiza, Eugenio; Franklin, Brian D.; Gao, Bo-Cai

    2012-09-01

    We report the characteristics of the Portable Remote Imaging Spectrometer, an airborne sensor specifically designed for the challenges of coastal ocean research. PRISM has high signal to noise ratio and uniformity, as well as low polarization sensitivity. Acquisition of high quality data has been demonstrated with the first engineering flight.

  20. Portable triple silicon detector telescope spectrometer for skin dosimetry

    DEFF Research Database (Denmark)

    Helt-Hansen, J.; Larsen, H.E.; Christensen, P.

    1999-01-01

    , portable processing unit including a laptop computer executing control, monitor, histogram and display tasks. The use of digital signal processing at an early stage of the signal chain has facilitated the achievement of a compact, low-weight device. 256 channels are available for each of the three...

  1. Clinical use ofa portable electronic device to measure haematocrit

    African Journals Online (AJOL)

    A small portable device, the blood electrometer. '(BEM), was developed to assist cliriicians to distinguish patients with extreme blood loss from those with normal packed cell volumes. The BEM operates on the princi- ple that blood cells do not conduct a low-frequency alternating current while plasma conducts electricity.

  2. Treatment of Vestibular Dysfunction Using a Portable Stimulation

    Science.gov (United States)

    2016-04-01

    dysfunction we will optimize stimulation using a portable stochastic noise electrical stimulator and determine the effectiveness of subsensory electrical ...stochastic noise electrical stimulator to improve driving performance and determine what effect subsensory electrical stimulation has on vestibular...the regulatory board prior to approval (Completed) c. Obtaining DoD HRPO approval (Completed) Milestone #2: Regulatory review and approval obtained

  3. [Portable gas chromatography for determining airborne acrylonitrile in workplaces].

    Science.gov (United States)

    Liu, Jian; Zhang, Feng; Zhu, Bao-li

    2013-10-01

    To establish a method for rapid determination of airborne acrylonitrile using a portable gas chromatograph. A single standard sample of acrylonitrile was prepared in a laboratory and sampled by the built-in constant flow pump of the portable gas chromatograph. The sample was then preconcentrated by the preconcentrator, thermally desorbed, separated by capillary columns, and detected by a micro argon ionization detector to determine the retention time. Retention time was then used to perform qualitative analysis. Under the set condition of gas chromatography, the external standard method was used to create a standard curve for quantitative analysis of acrylonitrile. The linear range of acrylonitrile on the portable gas chromatograph was 0.25 to 3.00 mg/m(3). The regression equation was y = 10(-5) x-0.0275, r = 0.9977. The limit of detection was 0.005 mg/m(3), and the lower limit of quantification was 0.25 mg/m(3). The relative standard deviation was lower than 7.09%, and the degree of accuracy was 91.09-105.54%. Portable gas chromatography is a simple, repeatable, and accurate method for rapid determination of airborne acrylonitrile.

  4. Application of portable optical laboratory in high schools and colleges

    Science.gov (United States)

    Altshuler, Gregory B.; Belashenkov, Nickolai R.; Ermolaev, Vladimir S.; Inochkin, Mickle V.; Karasev, Vyatcheslav B.

    1995-10-01

    The present paper describes the experience of application of portable optical laboratory in optical practicum developed directly for training and demonstrations of basic optical laws and phenomena in high-schools, colleges and nontechnical universities all over Russia. The laboratory includes the portable optical platform with built-in laser and lamp sources, kit of optical components and software. These accessories provide the attractive and smart teaching in general optics during lectures, lessons and practice at schools and colleges. The portable optical laboratory provides 28 basic lab works and demonstrations in reflection, refraction, absorption and dispersion of light, interference, diffraction, polarization of light, image formation and waveguide propagation of light in optical fibers. Due to their interdependence one can teach and learn a whole course of general optics. The individual work of students and school children with optical kit stimulates and develops their creative abilities and experimental skills, as well increases the effectiveness of education. The kit is provided with optional elements for a number of extra experiments with holography, polarizing light propagation, simple optical devices etc. These extensions allow to modify the education process according to teacher's point of view. The conception of optical class-room based on portable optical laboratories is discussed. The effectiveness of individual and small-group training is analyzed.

  5. Adjustable permanent magnet assembly for NMR and MRI

    Science.gov (United States)

    Pines, Alexander; Paulsen, Jeffrey; Bouchard, Louis S; Blumich, Bernhard

    2013-10-29

    System and methods for designing and using single-sided magnet assemblies for magnetic resonance imaging (MRI) are disclosed. The single-sided magnet assemblies can include an array of permanent magnets disposed at selected positions. At least one of the permanent magnets can be configured to rotate about an axis of rotation in the range of at least +/-10 degrees and can include a magnetization having a vector component perpendicular to the axis of rotation. The single-sided magnet assemblies can further include a magnet frame that is configured to hold the permanent magnets in place while allowing the at least one of the permanent magnets to rotate about the axis of rotation.

  6. Characteristics and applications of small, portable gaseous air pollution monitors.

    Science.gov (United States)

    McKercher, Grant R; Salmond, Jennifer A; Vanos, Jennifer K

    2017-04-01

    Traditional approaches for measuring air quality based on fixed measurements are inadequate for personal exposure monitoring. To combat this issue, the use of small, portable gas-sensing air pollution monitoring technologies is increasing, with researchers and individuals employing portable and mobile methods to obtain more spatially and temporally representative air pollution data. However, many commercially available options are built for various applications and based on different technologies, assumptions, and limitations. A review of the monitor characteristics of small, gaseous monitors is missing from current scientific literature. A state-of-the-art review of small, portable monitors that measure ambient gaseous outdoor pollutants was developed to address broad trends during the last 5-10 years, and to help future experimenters interested in studying gaseous air pollutants choose monitors appropriate for their application and sampling needs. Trends in small, portable gaseous air pollution monitor uses and technologies were first identified and discussed in a review of literature. Next, searches of online databases were performed for articles containing specific information related to performance, characteristics, and use of such monitors that measure one or more of three criteria gaseous air pollutants: ozone, nitrogen dioxide, and carbon monoxide. All data were summarized into reference tables for comparison between applications, physical features, sensing capabilities, and costs of the devices. Recent portable monitoring trends are strongly related to associated applications and audiences. Fundamental research requires monitors with the best individual performance, and thus the highest cost technology. Monitor networking favors real-time capabilities and moderate cost for greater reproduction. Citizen science and crowdsourcing applications allow for lower-cost components; however important strengths and limitations for each application must be addressed

  7. Adjusted Clinical Groups: a patient classification system through risk adjustment

    OpenAIRE

    Sicras-Mainar, Antonio; Dirección de Planificación, Badalona Serveis Assistencials. Barcelona, España. Médico doctor en Medicina, especialista en Salud Pública.; Navarro-Artieda, Ruth; Hospital Germans Trías i Pujol. Badalona, Barcelona, España. médica especialista en Documentación Médica.

    2014-01-01

    Adjusted Clinical Groups (ACG) are risk adjustment systems that classify people according to their age, sex and medical conditions, these people have a similar consumption of health resources over a given period of time. They were developed by Starfield and Weiner (Johns Hopkins University, USA, 1991), and their objective is to measure the degree of illness among patients based on the levels of comorbidity. Their main applications are: a) the evaluation of the efficiency in the use of hea...

  8. 76 FR 45860 - In the Matter of Certain Electronic Devices, Including Wireless Communication Devices, Portable...

    Science.gov (United States)

    2011-08-01

    ... communication devices, portable music and data processing devices, and tablet computers by reason of... communication devices, portable music and data processing devices, and tablet computers that infringe one or... COMMISSION In the Matter of Certain Electronic Devices, Including Wireless Communication Devices, Portable...

  9. 78 FR 32442 - Certain Cases for Portable Electronic Devices; Determination Not To Review an Initial...

    Science.gov (United States)

    2013-05-30

    ... COMMISSION Certain Cases for Portable Electronic Devices; Determination Not To Review an Initial... sale within the United States after importation of certain cases for portable electronic devices by... portable electronic devices by reason of infringement of various claims of the '561 patent. The complaint...

  10. 75 FR 4583 - In the Matter of: Certain Electronic Devices, Including Mobile Phones, Portable Music Players...

    Science.gov (United States)

    2010-01-28

    ... COMMISSION In the Matter of: Certain Electronic Devices, Including Mobile Phones, Portable Music Players, and... electronic devices, including mobile phones, portable music players, and computers, by reason of infringement... mobile phones, portable music players, or computers that infringe one or more of claims 1-12 of U.S...

  11. 78 FR 12785 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...

    Science.gov (United States)

    2013-02-25

    ... COMMISSION Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and... communication devices, portable music and data processing devices, computers and components thereof by reason of... evidence demonstrates that the existence of portable communication devices using ``touch sensitive input...

  12. 40 CFR 59.653 - How do I test portable fuel containers?

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 5 2010-07-01 2010-07-01 false How do I test portable fuel containers... Families § 59.653 How do I test portable fuel containers? You must test the portable fuel container as... pressure cycles specified by this paragraph (a)(1), you may ask to use special test procedures under § 59...

  13. 21 CFR 878.4680 - Nonpowered, single patient, portable suction apparatus.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Nonpowered, single patient, portable suction....4680 Nonpowered, single patient, portable suction apparatus. (a) Identification. A nonpowered, single patient, portable suction apparatus is a device that consists of a manually operated plastic, disposable...

  14. 46 CFR 167.45-65 - Portable fire extinguishers in accommodation spaces.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Portable fire extinguishers in accommodation spaces. 167... Portable fire extinguishers in accommodation spaces. (a) All nautical school ships shall be provided with such number of good and efficient portable fire extinguishers approved by the Navy or Coast Guard as...

  15. 46 CFR 95.05-15 - Hand portable fire extinguishers and semiportable fire extinguishing systems.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Hand portable fire extinguishers and semiportable fire... Equipment, Where Required § 95.05-15 Hand portable fire extinguishers and semiportable fire extinguishing systems. (a) Approved hand portable fire extinguishers and semiportable fire extinguishing systems shall...

  16. 46 CFR 193.05-15 - Hand portable fire extinguishers and semiportable fire extinguishing systems.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Hand portable fire extinguishers and semiportable fire... Equipment, Where Required § 193.05-15 Hand portable fire extinguishers and semiportable fire extinguishing systems. (a) Approved hand portable fire extinguishers and semiportable fire extinguishing systems shall...

  17. 46 CFR 76.05-25 - Hand portable fire extinguishers and semiportable fire extinguishing systems.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Hand portable fire extinguishers and semiportable fire... Required § 76.05-25 Hand portable fire extinguishers and semiportable fire extinguishing systems. (a) Approved hand portable fire extinguishers and semiportable fire extinguishing systems shall be installed on...

  18. 46 CFR 34.05-10 - Portable and semiportable extinguishers-TB/ALL.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Portable and semiportable extinguishers-TB/ALL. 34.05-10... Firefighting Equipment, Where Required § 34.05-10 Portable and semiportable extinguishers—TB/ALL. (a) All portable and semiportable extinguishers on board tank vessels shall be of an approved type. (b) The type...

  19. Portable energy: autonomy and integration in the human environment; Energie portable: autonomie et integration dans l'environnement humain

    Energy Technology Data Exchange (ETDEWEB)

    Multon, F.; Delamarche, P. [Rennes-2 Universite, Lab. de Physiologie et de Biomecanique de l& #x27; Exercice Mulsculaire, UMR. APS, 35 (France); Lucchese, P. [CEA Fontenay-aux-Roses, Dir. de la Recherche Technologique, Hydrogene et Pile a Combustible, 92 (France)] [and others

    2002-07-01

    This colloquium was motivated by the possibility to recover in our environment the energy produced by our movements, but also the heat emitted and the radiations received by the human body in order to supply the energy needs of portable electronic devices (telephones, micro-computers, watches, prostheses etc..). It tries to answer the different problems raised by the implementation of portable energy sources: the energy resources in the human environment, the physical and technological processes of energy production and storage, the electronic energy conversion and remote transmission means, the intelligent energy management, and the existing and potential applications of these processes. This document brings together 16 communications presented by searchers from various domains (biology, medicine, electrochemistry, computer science, mechanics, thermodynamics, electronics etc..) on the following topics: energy in the human body, possibilities of miniaturization of fuel cells, thermo-mechanical micro-generators, thermoelectric generation, solar cells and autonomy, micro-chargeable batteries, double-layer super-capacitors (principles and electrical behaviour), renewable energies in watches, electro-mechanical devices for the exploitation of human movements energy, trans-dermal power supply, new mechanical-aided systems for blood circulation, problems and their solutions related to portable telephones, low voltage and high efficiency power electronic systems for portable applications, remote energy transmission, intelligent energy management (equipments and softwares), electromagnetic environments and health. (J.S.)

  20. Normal Stress or Adjustment Disorder?

    Science.gov (United States)

    ... and symptoms of an adjustment disorder can include: Anxiety Poor school or work performance Relationship problems Sadness Thoughts of suicide Worry Trouble sleeping If you're dealing with a stressful situation in your life, try ...

  1. Normal Stress or Adjustment Disorder?

    Science.gov (United States)

    ... Lifestyle Stress management What's the difference between normal stress and an adjustment disorder? Answers from Daniel K. Hall-Flavin, M.D. Stress is a normal psychological and physical reaction to ...

  2. Household Adjustments to Hurricane Katrina

    National Research Council Canada - National Science Library

    Meri Davlasheridze; Qin Fan

    2017-01-01

    This paper examines household adjustments to Hurricane Katrina by estimating the effects of Katrina-induced damages on changes in household demographics and income distributions in the Orleans Parish...

  3. [Adjustment disorder during military service].

    Science.gov (United States)

    Kamrowska, Anna; Florkowski, Antoni

    2008-01-01

    Adjustment disorders in soldiers of mandatory military service are one of most frequent causes of early military discharges. Their occurrence brings about economic, social and medical consequences. The analysis of reasons and circumstances for adjustment disorders in solders of mandatory military service accepted by Medical Military Boards as unfit for military service. Studies included 91 cases of soldiers of mandatory military service hospitalised at the Psychiatry Clinical Department of Psychiatry in 10th Clinical Military Hospital in Bydgoszcz for the occurrence of symptoms of adjustment disorder acc. to criteria ICD-10 and certified by Medical Military Boards. The examined soldiers were at the age of 19-24, and the period of their military service ranged from one week to three months. To evaluate statistical correlations chi-square test (chi2) was used. Before the call-up, more than a half of the soldiers revealing symptoms of adjustment disorder lived in the country or in big urban agglomerations. Those soldiers had primary or vocational education certificates and every third was brought up in one-parent family. In the tested population of soldiers there was found a statistical relation between the appearance of adjustment disorders and the education of soldiers' mothers, parents' diseases and factors impeding their military service. Factors conducive to adjustment disorders under conditions of mandatory military service in the studies carried out included: education of soldiers' mothers, raised difficulties while serving in the army and parents' diseases.

  4. Rheumatoid arthritis: Skeletal manifestations observed on portable chest roentgenograms

    Energy Technology Data Exchange (ETDEWEB)

    Levine, R.B.; Sullivan, K.L.

    1985-04-01

    This report describes the thoracic skeletal radiographic findings of rheumatoid arthritis, observed on portable chest examinations of 21 patients. The pathophysiology is reviewed and additional examples of a recently described finding are illustrated: erosion of the medial surface of the proximal humerus with subsequent pathologic fracture, associated with superior and medial migration of the humeral head. It has been proposed that erosion of the medial aspect of the proximal humerus is due to impingement wear, and that pathologic fracture results from the fulcrum effect of the inferior lip of the glenoid on the humerus. Rheumatoid arthritis is often diagnosed by the clinician rather than the radiologist. However, in acutely ill patients receiving portable chest radiographs, complete history and laboratory findings are often unavailable. Attention to the thoracic skeleton may clarify pleural and/or parenchymal lung disease in these patients.

  5. Development of a portable sodium fluorescence aerosol generator model

    CERN Document Server

    LiuQun; Gao Xiao Mei; Jia Ming; Guo Chuang Cheng; Wu Tao; Liu Zhao Feng; Qiu Dan Gui

    2002-01-01

    A portable sodium fluorescence aerosol generator has been developed. It is a key equipment for in-situ testing of HEPA filters using sodium fluorescence method. The structure and technical specifications of the model generator are presented, along with its performance testing methods. The performance comparison result of the model with two French-made generators is also presented. The self-made generator has performances as follows: the average mass generating rate is 32.9 mg/h, mass median diameter of the particles 0.22 mu m and geometric standard deviation 1.58. The filtration efficiency up to 99.99% can be achieved flow-rate of ventilation system is less than 150000 m sup 3 /h. The portable model weight 25 kg, which is convenient for in situ testing

  6. Portable Computer Technology (PCT) Research and Development Program Phase 2

    Science.gov (United States)

    Castillo, Michael; McGuire, Kenyon; Sorgi, Alan

    1995-01-01

    The subject of this project report, focused on: (1) Design and development of two Advanced Portable Workstation 2 (APW 2) units. These units incorporate advanced technology features such as a low power Pentium processor, a high resolution color display, National Television Standards Committee (NTSC) video handling capabilities, a Personal Computer Memory Card International Association (PCMCIA) interface, and Small Computer System Interface (SCSI) and ethernet interfaces. (2) Use these units to integrate and demonstrate advanced wireless network and portable video capabilities. (3) Qualification of the APW 2 systems for use in specific experiments aboard the Mir Space Station. A major objective of the PCT Phase 2 program was to help guide future choices in computing platforms and techniques for meeting National Aeronautics and Space Administration (NASA) mission objectives. The focus being on the development of optimal configurations of computing hardware, software applications, and network technologies for use on NASA missions.

  7. Land rigs benefit from portable top drive system

    Energy Technology Data Exchange (ETDEWEB)

    1994-03-14

    A small, portable topdrive system, which can be installed in as little as 4 hr with little or no derrick modification, can help land rigs drill difficult or extended reach wells, according to Tesco Drilling Technology in Calgary. The units are designed for rigs that must be dismantled and moved after each well. To reduce the amount of derrick modifications, the systems are designed to fit on any rig that can make a conventional kelly connection with a 42-ft kelly and a 31-ft single. The compact unit can operate in tapered area above the monkey board. The first portable skid package went into the field in 1992. In its first 6 months of operation, this unit was installed on six rigs, drilled seven horizontal wells, and operated for about 2,000 hr with only 12.5 hr total downtime.

  8. Research and development of a versatile portable speech prosthesis

    Science.gov (United States)

    1981-01-01

    The Versatile Portable Speech Prosthesis (VPSP), a synthetic speech output communication aid for non-speaking people is described. It was intended initially for severely physically limited people with cerebral palsy who are in electric wheelchairs. Hence, it was designed to be placed on a wheelchair and powered from a wheelchair battery. It can easily be separated from the wheelchair. The VPSP is versatile because it is designed to accept any means of single switch, multiple switch, or keyboard control which physically limited people have the ability to use. It is portable because it is mounted on and can go with the electric wheelchair. It is a speech prosthesis, obviously, because it speaks with a synthetic voice for people unable to speak with their own voices. Both hardware and software are described.

  9. Toward Portable Breath Acetone Analysis for Diabetes Detection

    Science.gov (United States)

    Righettoni, Marco; Tricoli, Antonio

    2013-01-01

    Diabetes is a lifelong condition that may cause death and seriously affects the quality of life of a rapidly growing number of individuals. Acetone is a selective breath marker for diabetes that may contribute to the monitoring of related metabolic disorder and thus simplify the management of this illness. Here, the overall performance of Si-doped WO3 nanoparticles made by flame spray pyrolysis as portable acetone detectors is critically reviewed focusing on the requirements for medical diagnostic. The effect of flow rate, chamber volume and acetone dissociation within the measuring chamber are discussed with respect to the calibration of the sensor response. The challenges for the fabrication of portable breath acetone sensors based on chemo-resistive detectors are underlined indicating possible solutions and novel research directions. PMID:21828897

  10. Evaluating virtual reality mood induction procedures with portable EEG devices.

    Science.gov (United States)

    Rodríguez, Alejandro; Rey, Beatriz; Alcañiz, Mariano

    2013-01-01

    Virtual Environments (VEs) have been used as mood induction procedures. In this context, it is necessary to have instruments to analyze the emotional state during VE exposure. Objective techniques such as EEG should be evaluated for this purpose. The aim in this work was to study the changes in the brain activity with a portable EEG device during a negative mood induction based on a VE. A virtual park was used to induce a negative mood (sadness) in ten participants. Changes in the brain activity of subjects were compared between two moments (before and after emotional induction). Obtained results were in accordance with previous scientific literature regarding frontal EEG asymmetry, which supports the possibility of using the portable EEG as a reliable instrument to measure emotions in VE.

  11. Performance evaluation of cellular phone network based portable ECG device.

    Science.gov (United States)

    Hong, Joo-Hyun; Cha, Eun-Jong; Lee, Tae-Soo

    2008-01-01

    In this study, cellular phone network based portable ECG device was developed and three experiments were performed to evaluate the accuracy, reliability and operability, applicability during daily life of the developed device. First, ECG signals were measured using the developed device and Biopac device (reference device) during sitting and marking time and compared to verify the accuracy of R-R intervals. Second, the reliable data transmission to remote server was verified on two types of simulated emergency event using patient simulator. Third, during daily life with five types of motion, accuracy of data transmission to remote server was verified on two types of event occurring. By acquiring and comparing subject's biomedical signal and motion signal, the accuracy, reliability and operability, applicability during daily life of the developed device were verified. Therefore, cellular phone network based portable ECG device can monitor patient with inobtrusive manner.

  12. MOSBY: a molecular structure viewer program with portability and extensibility.

    Science.gov (United States)

    Ueno, Yutaka; Asai, Kiyoshi

    2002-03-01

    A molecular structure viewer program, MOSBY has been developed for studies that use atomic coordinates to understand the structures of protein molecules. The program is designed to be portable with a comprehensive user interface by our high-throughput graphics library. In addition, it cooperates with extension modules customized for individual research topics and analysis. For example, an electron density module loads and displays electron density maps derived in X-ray crystallographic analysis superimposed to an atomic model. A molecular dynamics module reads a trajectory file of the results of molecular dynamics calculations and animates the structure. These plug-in modules are devised to function without modification to the MOSBY program. For variations of analysis and calculations with atomic coordinates, the portability and extensibility illustrated by MOSBY play an important rule in scientific computational tools with active software development.

  13. Distributed Control System Design for Portable PC Based CNC Machine

    Directory of Open Access Journals (Sweden)

    Roni Permana Saputra

    2014-07-01

    Full Text Available The demand on automated machining has been increased and emerges improvement research to achieve many goals such as portability, low cost manufacturability, interoperability, and simplicity in machine usage. These improvements are conducted without ignoring the performance analysis and usability evaluation. This research has designed a distributed control system in purpose to control a portable CNC machine. The design consists of main processing unit, secondary processing unit, motor control, and motor driver. A preliminary simulation has been conducted for performance analysis including linear accuracy and circular accuracy. The results achieved in the simulation provide linear accuracy up to 2 μm with total cost for the whole processing unit is up to 5 million IDR.

  14. New designs for portable Raman instrumentation in defense applications

    Science.gov (United States)

    Carron, Keith; Ray, Bryan; Buller, Shane; Strickland, Aaron

    2016-05-01

    The realization of global terrorism after the September 11 attacks led immediately to a need for rapid field analysis of materials. Colorimetric test kits existed, but they are very subjective to interpret and they require contact with the sample. A push for handheld spectrometers quickly led to FTIR systems with ATR sampling, handheld IMS systems, and handheld Raman spectrometers. No single technique solves all of the problems of field detection. We will discuss the development of Raman instrumentation and, in particular, cover the advantages and the problems that are inherent in Raman portability. Portable Raman instrumentation began with a limited number of accessories: a point-and-shoot and some sort of vial adaptor. Currently this has expanded to stand-off attachments for measurements at a distance, air sampling to look for toxic gasses or aerosols, Orbital Raster Scan (ORS) to spatially average over samples, SERS attachments for trace detection, and fiber optic probes.

  15. Polymer electrolyte fuel cell mini power unit for portable application

    Energy Technology Data Exchange (ETDEWEB)

    Urbani, F.; Squadrito, G.; Barbera, O.; Giacoppo, G.; Passalacqua, E. [CNR-ITAE, via Salita S. Lucia sopra Contesse n. 5, 98126 S. Lucia, Messina (Italy); Zerbinati, O. [Universita del Piemonte Orientale, Dip. di Scienze dell' Ambiente e della Vita, via Bellini 25/g, 15100 Alessandria (Italy)

    2007-06-20

    This paper describes the design, realisation and test of a power unit based on a polymer electrolyte fuel cell, operating at room temperature, for portable application. The device is composed of an home made air breathing fuel cell stack, a metal hydride tank for H{sub 2} supply, a dc-dc converter for power output control and a fan for stack cooling. The stack is composed by 10 cells with an active surface of 25 cm{sup 2} and produces a rated power of 15 W at 6 V and 2 A. The stack successfully runs with end-off fed hydrogen without appreciable performance degradation during the time. The final assembled system is able to generate 12 W at 9.5 V, and power a portable DVD player for 3 h in continuous. The power unit has collected about 100 h of operation without maintenance. (author)

  16. The Design and Construction of a Portable Kerosene Pressure ...

    African Journals Online (AJOL)

    FIRST LADY

    40. 160. 7. Control valves. 2. 150. 300. 8. Tube. 1. 150. 150. 9. Oil paint. 1. 350. 350. 10. Nut and thread on the cylinder. 1. 200. 200. 11. Car-tyre Valve. 1. 50. 50. 12. Welding. 600. 13. Kerosene fitter. 1. 200. 200. 14. Hand pump. 1. 400. 400. Total. 4830. The Design and Construction of a Portable kerosene Pressure Cooker ...

  17. Flat Top Barge 300 feet Using Portable Dynamic Positioning System

    Directory of Open Access Journals (Sweden)

    Agoes Santoso

    2017-03-01

    Full Text Available Portable Dynamic Positioning System has not commonly applied to the ship, especially on barge. Besides for Dynamic Positioning function, the system can be used as ship's main propulsion. By using this system, the ship able to not using anchors because the functions can be performed by the Portable Dynamic System. Therefore, research about the application of Portable Dynamic Positioning System on the ship is conducted. This research aims to design a Flat Top Barge 300feet ship, to determine the specifications of Portable Dynamic Positioning System which is used, and to find out the ship stability which is designed on the empty payload condition and maximum payload. This research designed the ships with main dimensions LWL 90.1 meters, 25 meters wide, 5.5 meters high and 4.2 meters draught. To generate the ship with a maximum speed of 8 knots, it takes four thruster supplied with power 225 kW each, so that the total generated power is 1100 kW. This study analyzes three conditions of the ship stability, there are the condition of full payload, empty payload, and maximum payload. Each payload conditions will be analyzed regarding the large payload and draught water produced. The first is full payload conditions resulting payload in the amount of 5650 ton with a draught on the LCF at 4,181 meters. The second is the large empty payload condition displacement is 2809 ton and water draught on the LCF at 1,591. And the last is maximum payload conditions, resulting payload in the amount of 7450 ton with a draught on the LCF at 4,994 meters.

  18. Treatment of Vestibular Dysfunction Using a Portable Stimulator

    Science.gov (United States)

    2017-04-01

    AWARD NUMBER: W81XWH-14-2-0012 TITLE: Treatment of Vestibular Dysfunction Using a Portable Stimulator PRINCIPAL INVESTIGATOR: Jorge M...PAGE UU 17 19b. TELEPHONE NUMBER (include area code) Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std. Z39.18 Treatment of Vestibular...noise over a 2week stimulation paradigm Significant Results of Year 3 1) Research flyers have been posted to aid in recruitment. Fourteen

  19. A Portable Burn Pan for the Disposal of Excess Propellants

    Science.gov (United States)

    2016-06-01

    Measuring energetic contaminant deposition rates on snow. Water Air Soil Pollut (2012) 223:3689–3699. [25] Rasemann, W (2000) Industrial waste dumps...2013 - 06/01/2016 A Portable Burn Pan for the Disposal of Excess Propellants Michael Walsh USA CRREL USA CRREL 72 Lyme Road Hanover, NH 03755...detected in surface waters . Local regulations also require the transportation of excess charges to remote burn facilities, which results in the absence of

  20. Non-Catalytic Reforming with Applications to Portable Power

    Science.gov (United States)

    2013-10-01

    Bioresource Technology . 107(0): p. 482-486. 40. Humer, S., et al., Experimental and kinetic modeling study of combustion of JP-8, its surrogates and...promising technology as an alternative for portable power applications, because they offer higher power densities, do not include moving parts, and thus are...processed, or reformed, into a syngas consisting of hydrogen, carbon monoxide, and other species. Conventional reforming technologies utilize

  1. Development of a portable blood irradiator for potential clinical uses

    Energy Technology Data Exchange (ETDEWEB)

    Hungate, F.P.

    1988-12-01

    This document provides an account of the development of a fully portable blood irradiator and the evaluation of its safety and efficacy when implanted in goats, sheep, a baboon and dogs. The program was initiated because the control of lymphocyte populations by irradiation is a potential method for improving success in organ or tissue transplantation and for treating a variety of blood diseases. 15 refs., 27 figs., 2 tabs.

  2. A portable implementation of ARPACK for distributed memory parallel architectures

    Energy Technology Data Exchange (ETDEWEB)

    Maschhoff, K.J.; Sorensen, D.C.

    1996-12-31

    ARPACK is a package of Fortran 77 subroutines which implement the Implicitly Restarted Arnoldi Method used for solving large sparse eigenvalue problems. A parallel implementation of ARPACK is presented which is portable across a wide range of distributed memory platforms and requires minimal changes to the serial code. The communication layers used for message passing are the Basic Linear Algebra Communication Subprograms (BLACS) developed for the ScaLAPACK project and Message Passing Interface(MPI).

  3. ASC-ATDM Performance Portability Requirements for 2015-2019

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, Harold C. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Computing Research Center; Trott, Christian Robert [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Computing Research Center

    2015-03-01

    This report outlines the research, development, and support requirements for the Advanced Simulation and Computing (ASC ) Advanced Technology, Development, and Mitigation (ATDM) Performance Portability (a.k.a., Kokkos) project for 2015 - 2019 . The research and development (R&D) goal for Kokkos (v2) has been to create and demonstrate a thread - parallel programming model a nd standard C++ library - based implementation that enables performance portability across diverse manycore architectures such as multicore CPU, Intel Xeon Phi, and NVIDIA Kepler GPU. This R&D goal has been achieved for algorithms that use data parallel pat terns including parallel - for, parallel - reduce, and parallel - scan. Current R&D is focusing on hierarchical parallel patterns such as a directed acyclic graph (DAG) of asynchronous tasks where each task contain s nested data parallel algorithms. This five y ear plan includes R&D required to f ully and performance portably exploit thread parallelism across current and anticipated next generation platforms (NGP). The Kokkos library is being evaluated by many projects exploring algorithm s and code design for NGP. Some production libraries and applications such as Trilinos and LAMMPS have already committed to Kokkos as their foundation for manycore parallelism an d performance portability. These five year requirements includes support required for current and antic ipated ASC projects to be effective and productive in their use of Kokkos on NGP. The greatest risk to the success of Kokkos and ASC projects relying upon Kokkos is a lack of staffing resources to support Kokkos to the degree needed by these ASC projects. This support includes up - to - date tutorials, documentation, multi - platform (hardware and software stack) testing, minor feature enhancements, thread - scalable algorithm consulting, and managing collaborative R&D.

  4. Development System for FPGA-Controlled, Portable Processing Systems

    Science.gov (United States)

    2015-12-08

    SECURITY CLASSIFICATION OF: The goal of this proposal was to establish an infrastructure for Field programmable Gate Array ( FPGA ) programming and...for Public Release; Distribution Unlimited Final Report: Development System for FPGA -Controlled, Portable Processing Systems The views, opinions and...Number of Papers published in peer-reviewed journals: Number of Papers published in non peer-reviewed journals: Final Report: Development System for FPGA

  5. A Portable Laser Photoacoustic Methane Sensor Based on FPGA

    Directory of Open Access Journals (Sweden)

    Jianwei Wang

    2016-09-01

    Full Text Available A portable laser photoacoustic sensor for methane (CH4 detection based on a field-programmable gate array (FPGA is reported. A tunable distributed feedback (DFB diode laser in the 1654 nm wavelength range is used as an excitation source. The photoacoustic signal processing was implemented by a FPGA device. A small resonant photoacoustic cell is designed. The minimum detection limit (1σ of 10 ppm for methane is demonstrated.

  6. Portable EGG recording system based on a digital voice recorder.

    Science.gov (United States)

    Jang, J-K; Shieh, M-J; Kuo, T-S; Jaw, F-S

    2009-01-01

    Cutaneous electrogastrogram (EGG) recording offers the benefit of non-invasive gastrointestinal diagnosis. With long-term ambulatory recording of signals, researchers and clinicians could have more opportunities to investigate and analyse paroxysmal or acute symptoms. A portable EGG system based on a digital voice recorder (DVR) is designed for long-term recording of cutaneous EGG signals. The system consists of electrodes, an EGG amplifier, a modulator, and a DVR. Online monitoring and off-line acquisition of EGG are handled by software. A special design employing an integrated timer circuit is used to modulate the EGG frequency to meet the input requirements of the DVR. This approach involves low supply voltage and low power consumption. Software demodulation is used to simplify the complexity of the system, and is helpful in reducing the size of the portable device. By using surface-mount devices (SMD) and a low-power design, the system is robust, compact, and suitable for long-term portable recording. As a result, researchers can record an ambulatory EGG signal by means of the proposed circuits in conjunction with an up-to-date voice-recording device.

  7. Portable tester for determining gas content within a core sample

    Science.gov (United States)

    Garcia, Jr., Fred; Schatzel, Steven J.

    1998-01-01

    A portable tester is provided for reading and displaying the pressure of a gas released from a rock core sample stored within a sealed container and for taking a sample of the released pressurized gas for chemical analysis thereof for subsequent use in a modified direct method test which determines the volume of gas and specific type of gas contained within the core sample. The portable tester includes a pair of low and high range electrical pressure transducers for detecting a gas pressure; a pair of low and high range display units for displaying the pressure of the detected gas- a selector valve connected to the low and high range pressure transducers, a selector knob for selecting gas flow to one of the flow paths; control valve having an inlet connection to the sealed container, and outlets connected to: a sample gas canister, a second outlet port connected to the selector valve means for reading the pressure of the gas from the sealed container to either the low range or high range pressure transducers, and a connection for venting gas contained within the sealed container to the atmosphere. A battery is electrically connected to and supplies the power for operating the unit. The pressure transducers, display units, selector and control valve means and the battery is mounted to and housed within a protective casing for portable transport and use.

  8. A Portable Farmland Information Collection System with Multiple Sensors.

    Science.gov (United States)

    Zhang, Jianfeng; Hu, Jinyang; Huang, Lvwen; Zhang, Zhiyong; Ma, Yimian

    2016-10-22

    Precision agriculture is the trend of modern agriculture, and it is also one of the important ways to realize the sustainable development of agriculture. In order to meet the production requirements of precision agriculture-efficient use of agricultural resources, and improving the crop yields and quality-some necessary field information in crop growth environment needs to be collected and monitored. In this paper, a farmland information collection system is developed, which includes a portable farmland information collection device based on STM32 (a 32-bit comprehensive range of microcontrollers based on ARM Crotex-M3), a remote server and a mobile phone APP. The device realizes the function of portable and mobile collecting of multiple parameters farmland information, such as chlorophyll content of crop leaves, air temperature, air humidity, and light intensity. UM220-III (Unicore Communication Inc., Beijing, China) is used to realize the positioning based on BDS/GPS (BeiDou Navigation Satellite System, BDS/Global Positioning System, GPS) dual-mode navigation and positioning system, and the CDMA (Code Division Multiple Access, CDMA) wireless communication module is adopted to realize the real-time remote transmission. The portable multi-function farmland information collection system is real-time, accurate, and easy to use to collect farmland information and multiple information parameters of crops.

  9. Portable+: A Ubiquitous And Smart Way Towards Comfortable Energy Savings

    Energy Technology Data Exchange (ETDEWEB)

    Jain, Milan [IIIT-Delhi; Singh, Amarjeet [IIIT-Delhi; Chandan, Vikas [Pacific Northwest National Laboratory

    2017-06-30

    An air conditioner (AC) consumes a significant proportion of the total household power consumption. Primarily used in developing countries, decentralised AC has an inbuilt thermostat to cool the room to a temperature, manually set by the users. However, residents are incapable of specifying their goal through these thermostats - maximise their comfort or save AC energy. State-of-the-art portable thermostats emulate AC remotes and assist occupants in remotely changing the thermostat temperature, through their smartphones. We propose extending such thermostats to portable+ by adding a Comfort-Energy Trade-off (CET) knob, realised through an optimisation framework to allow users to balance their comfort and the savings without worrying about the right set temperature. Analysis based on real data, collected from a controlled experiment (across two rooms for two weeks) and an in-situ deployment (across five rooms for three months), indicates that portable+ thermostats can reduce residents’ discomfort by 23% (CET selection for maximal comfort) and save 26% energy when CET is set for maximising savings.

  10. Multimedia architectures: from desktop systems to portable appliances

    Science.gov (United States)

    Bhaskaran, Vasudev; Konstantinides, Konstantinos; Natarajan, Balas R.

    1997-01-01

    Future desktop and portable computing systems will have as their core an integrated multimedia system. Such a system will seamlessly combine digital video, digital audio, computer animation, text, and graphics. Furthermore, such a system will allow for mixed-media creation, dissemination, and interactive access in real time. Multimedia architectures that need to support these functions have traditionally required special display and processing units for the different media types. This approach tends to be expensive and is inefficient in its use of silicon. Furthermore, such media-specific processing units are unable to cope with the fluid nature of the multimedia market wherein the needs and standards are changing and system manufacturers may demand a single component media engine across a range of products. This constraint has led to a shift towards providing a single-component multimedia specific computing engine that can be integrated easily within desktop systems, tethered consumer appliances, or portable appliances. In this paper, we review some of the recent architectural efforts in developing integrated media systems. We primarily focus on two efforts, namely the evolution of multimedia-capable general purpose processors and a more recent effort in developing single component mixed media co-processors. Design considerations that could facilitate the migration of these technologies to a portable integrated media system also are presented.

  11. Portable XRF Technology to Quantify Pb in Bone In Vivo.

    Science.gov (United States)

    Specht, Aaron James; Weisskopf, Marc; Nie, Linda Huiling

    2014-01-01

    Lead is a ubiquitous toxicant. Bone lead has been established as an important biomarker for cumulative lead exposures and has been correlated with adverse health effects on many systems in the body. K-shell X-ray fluorescence (KXRF) is the standard method for measuring bone lead, but this approach has many difficulties that have limited the widespread use of this exposure assessment method. With recent advancements in X-ray fluorescence (XRF) technology, we have developed a portable system that can quantify lead in bone in vivo within 3 minutes. Our study investigated improvements to the system, four calibration methods, and system validation for in vivo measurements. Our main results show that the detection limit of the system is 2.9 ppm with 2 mm soft tissue thickness, the best calibration method for in vivo measurement is background subtraction, and there is strong correlation between KXRF and portable LXRF bone lead results. Our results indicate that the technology is ready to be used in large human population studies to investigate adverse health effects of lead exposure. The portability of the system and fast measurement time should allow for this technology to greatly advance the research on lead exposure and public/environmental health.

  12. A Portable Farmland Information Collection System with Multiple Sensors

    Directory of Open Access Journals (Sweden)

    Jianfeng Zhang

    2016-10-01

    Full Text Available Precision agriculture is the trend of modern agriculture, and it is also one of the important ways to realize the sustainable development of agriculture. In order to meet the production requirements of precision agriculture—efficient use of agricultural resources, and improving the crop yields and quality—some necessary field information in crop growth environment needs to be collected and monitored. In this paper, a farmland information collection system is developed, which includes a portable farmland information collection device based on STM32 (a 32-bit comprehensive range of microcontrollers based on ARM Crotex-M3, a remote server and a mobile phone APP. The device realizes the function of portable and mobile collecting of multiple parameters farmland information, such as chlorophyll content of crop leaves, air temperature, air humidity, and light intensity. UM220-III (Unicore Communication Inc., Beijing, China is used to realize the positioning based on BDS/GPS (BeiDou Navigation Satellite System, BDS/Global Positioning System, GPS dual-mode navigation and positioning system, and the CDMA (Code Division Multiple Access, CDMA wireless communication module is adopted to realize the real-time remote transmission. The portable multi-function farmland information collection system is real-time, accurate, and easy to use to collect farmland information and multiple information parameters of crops.

  13. Portable visible and near-infrared spectrophotometer for triglyceride measurements.

    Science.gov (United States)

    Kobayashi, Takanori; Kato, Yukiko Hakariya; Tsukamoto, Megumi; Ikuta, Kazuyoshi; Sakudo, Akikazu

    2009-01-01

    An affordable and portable machine is required for the practical use of visible and near-infrared (Vis-NIR) spectroscopy. A portable fruit tester comprising a Vis-NIR spectrophotometer was modified for use in the transmittance mode and employed to quantify triglyceride levels in serum in combination with a chemometric analysis. Transmittance spectra collected in the 600- to 1100-nm region were subjected to a partial least-squares regression analysis and leave-out cross-validation to develop a chemometrics model for predicting triglyceride concentrations in serum. The model yielded a coefficient of determination in cross-validation (R2VAL) of 0.7831 with a standard error of cross-validation (SECV) of 43.68 mg/dl. The detection limit of the model was 148.79 mg/dl. Furthermore, masked samples predicted by the model yielded a coefficient of determination in prediction (R2PRED) of 0.6856 with a standard error of prediction (SEP) and detection limit of 61.54 and 159.38 mg/dl, respectively. The portable Vis-NIR spectrophotometer may prove convenient for the measurement of triglyceride concentrations in serum, although before practical use there remain obstacles, which are discussed.

  14. [Portable Epileptic Seizure Monitoring Intelligent System Based on Android System].

    Science.gov (United States)

    Liang, Zhenhu; Wu, Shufeng; Yang, Chunlin; Jiang, Zhenzhou; Yu, Tao; Lu, Chengbiao; Li, Xiaoli

    2016-02-01

    The clinical electroencephalogram (EEG) monitoring systems based on personal computer system can not meet the requirements of portability and home usage. The epilepsy patients have to be monitored in hospital for an extended period of time, which imposes a heavy burden on hospitals. In the present study, we designed a portable 16-lead networked monitoring system based on the Android smart phone. The system uses some technologies including the active electrode, the WiFi wireless transmission, the multi-scale permutation entropy (MPE) algorithm, the back-propagation (BP) neural network algorithm, etc. Moreover, the software of Android mobile application can realize the processing and analysis of EEG data, the display of EEG waveform and the alarm of epileptic seizure. The system has been tested on the mobile phones with Android 2. 3 operating system or higher version and the results showed that this software ran accurately and steadily in the detection of epileptic seizure. In conclusion, this paper provides a portable and reliable solution for epileptic seizure monitoring in clinical and home applications.

  15. Portable power supply options for positive airway pressure devices.

    Science.gov (United States)

    Riaz, Muhammad; Certal, Victor; Camacho, Macario

    2015-01-01

    Patients with obstructive sleep apnea (OSA) often face the challenge of how to power their positive airway pressure (PAP) devices when alternating current power supplies are not available in remote areas with lack of electricity or frequent power outages. This article elucidates portable power supply options for PAP devices with the aim to increase alternative power source awareness among medical providers. A search of scientific databases (Medline, Scopus, Web of Science, Google Scholar, and the Cochrane Library) was carried out on the topic of alternative portable power supply options for treatment of OSA. Scientific databases listed above yielded only limited results. Most articles were found via Google search. These articles were reviewed for alternative power supply options for OSA patients when alternating current is not available. The power supply options in this article include lead-acid batteries (starter, marine and deep-cycle batteries), lithium ion batteries, solar kits, battery packs, backup power systems, portable generators, and travel-size PAP devices. There are several options to power PAP devices with direct current when alternating current is not available. Knowledgeable primary care physicians especially in rural and remote areas can help OSA patients improve PAP compliance in order to mitigate morbidity and long-term complications of OSA.

  16. Bacteriological research for the contamination of digital portable radiography

    Energy Technology Data Exchange (ETDEWEB)

    Shin, Seong Gyu [Dept. of Radiology, Dong A University Hospital, Busan (Korea, Republic of); Lee, Hyo Yeong [Dept. of Radiological Science, Dong Eui University, Busan (Korea, Republic of)

    2017-03-15

    The study was performed to investigate the bacteriological contamination of portable digital radiography system and their detectors in a university hospital. CNS and VRE were detected in the samples collected from vinyl cover on detectors used for the infection control patients. On the other hand, no bacteria was detected in the samples collected from detectors with vinyl cover removed. In the series of imaging of patients from general wards, no bacteria was detected from the patient 1. However, CNS was detected from the patients 2 and 3, CNS and Enterococcus faecalis detected from the patient 4, CNS and Enterococcus casseliflavus detected from the patient 5, and CNS, Enterococcus casseliflavus, and Klebsiella pneumoniae all detected from the patient 6. CNS and Enterococcus faecium were detected in the controller handle of collimator. Also, CNS was detected from the handle of detector and exposure switch. In the treatment gloves of the radiological technologist after the imaging, CNS, Enterococcus gallinarum, and Klebsiella pneumoniae were detected. Therefore, it is recommended for DR portable to take images after sterilizing the detector after taking each image and to use disposable vinyl covers on detectors to remove after imaging. And treatment gloves must be changed after each imaging. Also, hospital infection via portables must be prevented by complete sterilization of the controller handles of collimator which are in frequent contact during imaging and infection education of employees.

  17. Performance of Portable Ventilators Following Storage at Temperature Extremes.

    Science.gov (United States)

    Blakeman, Thomas C; Rodriquez, Dario; Britton, Tyler J; Johannigman, Jay A; Petro, Michael C; Branson, Richard D

    2016-05-01

    In the current theater of operation, medical devices are often shipped and stored at ambient conditions. The effect of storage at hot and cold temperature extremes on ventilator performance is unknown. We evaluated three portable ventilators currently in use or being evaluated for use by the Department of Defense (731, Impact Instrumentation; T1, Hamilton Medical; and Revel, CareFusion) at temperature extremes in a laboratory setting. The ventilators were stored at temperatures of 60°C and -35°C for 24 hours and were allowed to acclimate to room temperature for 30 minutes before evaluation. The T1 required an extra 15 to 30 minutes of acclimation to room temperature before the ventilator would deliver breaths. All delivered tidal volumes at room temperature and after storage at temperature extremes were less than the ±10% American Society for Testing and Materials standard with the Revel. Delivered tidal volumes at the pediatric settings were less than the ±10% threshold after storage at both temperatures and at room temperature with the 731. Storage at extreme temperature affected the performance of the portable ventilators tested. This study showed that portable ventilators may need an hour or more of acclimation time at room temperature after storage at temperature extremes to operate as intended. Reprint & Copyright © 2016 Association of Military Surgeons of the U.S.

  18. A portable microkeratome-based anterior corneal surface harvesting device.

    Science.gov (United States)

    Sarayba, Melvin A; Li, Li; Sweet, Paula M; Chuck, Roy S

    2002-08-01

    To determine the reproducibility of anterior sclerokeratectomy using a portable nonelectric microkeratome-based device capable of harvesting the entire anterior corneal surface for lamellar transplantation. A modified gas turbine-driven microkeratome (LSK One, Moria/Microtech, Doylestown, PA) with a redesigned head large enough to incorporate the whole human anterior corneal surface in a pass and was coupled to a manual vacuum pump. This instrument was tested on 25 fresh porcine globes divided into 2 groups (170-microm and 200-microm head). To assess cut reproducibility the physical dimensions (diameter and thickness) of the obtained lenticules were measured. The obtained lenticules were fairly circular (horizontal versus vertical diameters, p >0.2), with average diameters of 12.85 +/- 0.52 mm and 13.25 +/- 1.15 mm for the 170 and 200-microm heads, respectively. The average central lenticule thickness was 176.92 +/- 34.68 microm and 166.00 +/- 53.74 microm for the 170 and 200-microm heads, respectively. This new system presents an economical and portable alternative to electric-powered systems. In addition to being used by surgeons in the operating room, eye bank technicians in the field could theoretically use this system; including in developing countries where cost, availability of electricity, and portability are issues.

  19. Fiscal Adjustment in IMF-Supported Adjustment Programmes: The ...

    African Journals Online (AJOL)

    Fiscal adjustment is an essential element of macro-economic stability and economic growth. Given that economic growth is the most powerful weapon in the fight for higher living standards, poor growth performance in African countries, has been a challenge to economists, policy makers and international development ...

  20. GPU Parallel Bundle Block Adjustment

    Directory of Open Access Journals (Sweden)

    ZHENG Maoteng

    2017-09-01

    Full Text Available To deal with massive data in photogrammetry, we introduce the GPU parallel computing technology. The preconditioned conjugate gradient and inexact Newton method are also applied to decrease the iteration times while solving the normal equation. A brand new workflow of bundle adjustment is developed to utilize GPU parallel computing technology. Our method can avoid the storage and inversion of the big normal matrix, and compute the normal matrix in real time. The proposed method can not only largely decrease the memory requirement of normal matrix, but also largely improve the efficiency of bundle adjustment. It also achieves the same accuracy as the conventional method. Preliminary experiment results show that the bundle adjustment of a dataset with about 4500 images and 9 million image points can be done in only 1.5 minutes while achieving sub-pixel accuracy.

  1. Acculturation, personality, and psychological adjustment.

    Science.gov (United States)

    Ahadi, Stephan A; Puente-Díaz, Rogelio

    2011-12-01

    Two studies investigated relationships between traditional indicators of acculturation, cultural distance, acculturation strategies, and basic dimensions of personality as they pertain to psychological adjustment among Hispanic students. Although personality characteristics have been shown to be important determinants of psychological well-being, acculturation research has put less emphasis on the role of personality in the well-being of immigrants. Hierarchical regression analysis showed that basic dimensions of personality such as extraversion and neuroticism were strongly related to psychological adjustment. Acculturation strategies did not mediate the effect of personality variables, but cultural resistance made a small, independent contribution to the explanation of some aspects of negative psychological adjustment. The implications of the results were discussed.

  2. Ancient Roman wall paintings mapped nondestructively by portable NMR.

    Science.gov (United States)

    Haber, Agnes; Blümich, Bernhard; Souvorova, Daria; Del Federico, Eleonora

    2011-09-01

    The stratigraphies of decorated walls in ancient Herculaneum, Italy, were analyzed by single-sided (1)H NMR. A large version of the NMR-MOUSE® with a maximum penetration depth of 25 mm was used to map proton density profiles at different positions of the Mosaic of Neptune and Amphitrite showing considerable differences between different tesserae and the mortar bed at different times of the year. In the House of the Black Room, different mortar layers were observed on painted walls as well as different proton content in different areas due to different moisture levels and different conservation treatments. The proton density profiles of the differently treated areas indicated that one method leads to higher moisture content than the other. Untreated wall paintings from different times were profiled in a recently excavated room at the Villa of the Papyri showing two different types of mortar layer structures which identify two different techniques of preparing the walls for painting. Reflectance Fourier mid-infrared spectroscopy and in situ X-ray fluorescence measurements complemented the NMR measurements and provided additional insight into the identification of organic coatings as well as the nature of the pigments used, respectively. The information acquired nondestructively by NMR is valued for elaborating conservation strategies and for identifying different schools of craftsmen who prepared the mortar supports of the wall paintings.

  3. Adjustable and automated system to obtain 2-D photometric patterns

    Science.gov (United States)

    Tecpoyotl-Torres, M.; Vera-Dimas, J. G.; Martínez-Fabián, S. E.; Mendoza-Zúñiga, J. L.; Escobedo-Alatorre, J.; Ibarra-Manzano, O. G.; Grimalsky, V. V.

    2013-09-01

    A complete adjustable and automated system has been developed on the base of three blocks: the first one is the mechanical and adjustable structure, which is composed by a mobile base and a rectangular arc, where the photodetector is located. The structure describes semi-spherical trajectories by means of two servomotors. Its lightweight and robustness constitutes two advantages which make it portable. The second stage corresponds to the automation of the structure movements. For controlling the motors and data acquisition, a microcontroller is employed that in turns helps keeping the cost of the overall system low. One of the servomotors is located on the lateral axis of the device; that displaces the sensor along a semi-circular trajectory of 160°, almost half meridians; the other one is located at the base of the illumination source, which enables it to realize an almost complete rotation around its axis. Finally, the last stage is formed by the graphical interface. The communication protocol between the data acquisition stage and the computer is USART. The graphical user interface (GUI) is developed using Visual C#. In the same window the data acquisition deployment and the data graph generator are given; the graphs can be shown in a polar or Cartesian formats showing more than one curve, if necessary, avoiding the use of additional software. The GUI keeps the low cost of the device, obtaining a comprehensive solution to generate the irradiance patterns of light sources.

  4. Bicultural Efficacy and College Adjustment.

    Science.gov (United States)

    Coleman, Hardin L. K.; And Others

    The retention of ethnic minorities is a major problem in American colleges and universities. This study deals with the factors that affect adjustment to college and, in particular, to achievement of "bicultural efficacy" for this group. Bicultural efficacy is defined as an individual's expectations that he or she can (or cannot) manage the stress…

  5. Technological Change: Helping Workers Adjust.

    Science.gov (United States)

    Mowery, David C.

    1987-01-01

    Discusses some of the problems in employment shifts and unemployment caused by new technologies in offices and factories. Addresses the Job Training Partnership Act (Title III) which was established as the primary assistance vehicle for displaced workers. Calls for workers to receive sufficient time to adjust to technologies. (TW)

  6. Adjustable chain trees for proteins

    DEFF Research Database (Denmark)

    Winter, Pawel; Fonseca, Rasmus

    2012-01-01

    A chain tree is a data structure for changing protein conformations. It enables very fast detection of clashes and free energy potential calculations. A modified version of chain trees that adjust themselves to the changing conformations of folding proteins is introduced. This results in much...

  7. Research of high power and stable laser in portable Raman spectrometer based on SHINERS technology

    Science.gov (United States)

    Cui, Yongsheng; Yin, Yu; Wu, Yulin; Ni, Xuxiang; Zhang, Xiuda; Yan, Huimin

    2013-08-01

    The intensity of Raman light is very weak, which is only from 10-12 to 10-6 of the incident light. In order to obtain the required sensitivity, the traditional Raman spectrometer tends to be heavy weight and large volume, so it is often used as indoor test device. Based on the Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy (SHINERS) method, Raman optical spectrum signal can be enhanced significantly and the portable Raman spectrometer combined with SHINERS method will be widely used in various fields. The laser source must be stable enough and able to output monochromatic narrow band laser with stable power in the portable Raman spectrometer based on the SHINERS method. When the laser is working, the change of temperature can induce wavelength drift, thus the power stability of excitation light will be affected, so we need to strictly control the working temperature of the laser, In order to ensure the stability of laser power and output current, this paper adopts the WLD3343 laser constant current driver chip of Wavelength Electronics company and MCU P89LPC935 to drive LML - 785.0 BF - XX laser diode(LD). Using this scheme, the Raman spectrometer can be small in size and the drive current can be constant. At the same time, we can achieve functions such as slow start, over-current protection, over-voltage protection, etc. Continuous adjustable output can be realized under control, and the requirement of high power output can be satisfied. Max1968 chip is adopted to realize the accurate control of the laser's temperature. In this way, it can meet the demand of miniaturization. In term of temperature control, integral truncation effect of traditional PID algorithm is big, which is easy to cause static difference. Each output of incremental PID algorithm has nothing to do with the current position, and we can control the output coefficients to avoid full dose output and immoderate adjustment, then the speed of balance will be improved observably. Variable

  8. Glaucoma Screening in Nepal: Cup-to-Disc Estimate With Standard Mydriatic Fundus Camera Compared to Portable Nonmydriatic Camera.

    Science.gov (United States)

    Miller, Sarah E; Thapa, Suman; Robin, Alan L; Niziol, Leslie M; Ramulu, Pradeep Y; Woodward, Maria A; Paudyal, Indira; Pitha, Ian; Kim, Tyson N; Newman-Casey, Paula Anne

    2017-10-01

    To compare cup-to-disc ratio (CDR) measurements from images taken with a portable, 45-degree nonmydriatic fundus camera to images from a traditional tabletop mydriatic fundus camera. Prospective, cross-sectional, comparative instrument validation study. Setting: Clinic-based. A total of 422 eyes of 211 subjects were recruited from the Tilganga Institute of Ophthalmology (Kathmandu, Nepal). Two masked readers measured CDR and noted possible evidence of glaucoma (CDR ≥ 0.7 or the presence of a notch or disc hemorrhage) from fundus photographs taken with a nonmydriatic portable camera and a mydriatic standard camera. Each image was graded twice. Effect of camera modality on CDR measurement; inter- and intraobserver agreement for each camera for the diagnosis of glaucoma. A total of 196 eyes (46.5%) were diagnosed with glaucoma by chart review; 41.2%-59.0% of eyes were remotely diagnosed with glaucoma over grader, repeat measurement, and camera modality. There was no significant difference in CDR measurement between cameras after adjusting for grader and measurement order (estimate = 0.004, 95% confidence interval [CI], 0.003-0.011, P = .24). There was moderate interobserver reliability for the diagnosis of glaucoma (Pictor: κ = 0.54, CI, 0.46-0.61; Topcon: κ = 0.63, CI, 0.55-0.70) and moderate intraobserver agreement upon repeat grading (Pictor: κ = 0.63 and 0.64, for graders 1 and 2, respectively; Topcon: κ = 0.72 and 0.80, for graders 1 and 2, respectively). A portable, nonmydriatic, fundus camera can facilitate remote evaluation of disc images on par with standard mydriatic fundus photography. Copyright © 2017 Elsevier Inc. All rights reserved.

  9. Birth-Order Complementarity and Marital Adjustment.

    Science.gov (United States)

    Vos, Cornelia J. Vanderkooy; Hayden, Delbert J.

    1985-01-01

    Tested the influence of birth-order complementarity on marital adjustment among 327 married women using the Spanier Dyadic Adjustment Scale (1976). Birth-order complementarity was found to be unassociated with marital adjustment. (Author/BL)

  10. Adjustable wheelchair and method for adjusting said adjustable wheelchair, and wheelchair assembly

    NARCIS (Netherlands)

    Oosterhuis, D.S.

    2013-01-01

    The invention relates to an adjustable wheelchair comprising: -a carriage; -two rear wheels; -at least one front wheel; -at least one footrest; -a sub-frame; -a seat; and -a backrest; wherein the two rear wheels, the at least one front wheel and the at least one footrest are mounted to the carriage,

  11. Portable, low-priced retinal imager for eye disease screening

    Science.gov (United States)

    Soliz, Peter; Nemeth, Sheila; VanNess, Richard; Barriga, E. S.; Zamora, Gilberto

    2014-02-01

    The objective of this project was to develop and demonstrate a portable, low-priced, easy to use non-mydriatic retinal camera for eye disease screening in underserved urban and rural locations. Existing portable retinal imagers do not meet the requirements of a low-cost camera with sufficient technical capabilities (field of view, image quality, portability, battery power, and ease-of-use) to be distributed widely to low volume clinics, such as the offices of single primary care physicians serving rural communities or other economically stressed healthcare facilities. Our approach for Smart i-Rx is based primarily on a significant departure from current generations of desktop and hand-held commercial retinal cameras as well as those under development. Our techniques include: 1) Exclusive use of off-the-shelf components; 2) Integration of retinal imaging device into low-cost, high utility camera mount and chin rest; 3) Unique optical and illumination designed for small form factor; and 4) Exploitation of autofocus technology built into present digital SLR recreational cameras; and 5) Integration of a polarization technique to avoid the corneal reflex. In a prospective study, 41 out of 44 diabetics were imaged successfully. No imaging was attempted on three of the subjects due to noticeably small pupils (less than 2mm). The images were of sufficient quality to detect abnormalities related to diabetic retinopathy, such as microaneurysms and exudates. These images were compared with ones taken non-mydriatically with a Canon CR-1 Mark II camera. No cases identified as having DR by expert retinal graders were missed in the Smart i-Rx images.

  12. CALCULATION OF ACOUSTIC EFFICIENCY OF PORTABLE ACOUSTIC SCREEN

    Directory of Open Access Journals (Sweden)

    Aleksandr Skvortsov

    2016-03-01

    Full Text Available The research of influence of life environment adverse factors on physical development and health of population is an actual problem of ecology. The aspects of the most actual problems of the modern world, namely environmental industrial noise pollution are considered in the article. Industrial facilities everywhere have noisy equipment. Noise is a significant factors of negative influenceon people and environment. Combined effects of noise and of other physical pollutions on people may cause amplification of their negative impact. If the noise pollution level from the object in a residential area exceeds the permissible levels (MPL, noise protection measures can be initiated. Today, the most common design decisions for noise protection are sound absorbing construction, noise screens and barriers, acousting housings, soundproff cabins. Many of them are popular, others are less known. The article deals with one of the most wide spread means of noise protection – a portable acoustic screen. The aim of the research is to determine the efficiency of portable acoustic screens. It is shown that the installation of such structures can reduce the average value of the sound level. The authors analyzed acoustic screens as device to reduce noise pollution. The authors offer a potable acoustic screen differing from the used easyness, mobility, minimum price and good sound protective properties. Effectiveness, a sound absorption coefficient and sound conductivity coefficient of a portable acoustic screen are evaluated. The descriptions of the algorithm calculations and the combination of technical solutions have practical originality. The results of the research demonstrate the advantages of the proposed solutions for reducing noise levels in the agro-industrial complex.

  13. Adjustment in the World Economy

    OpenAIRE

    Paul Krugman

    1987-01-01

    There is a widespread view that world payments imbalances can be remedied through increased demand in surplus countries and reduced demand in deficit countries, without any need for real exchange rate changes. In fact shifts in demand and real exchange rate adjustment are necessary couplets, not substitutes. The essential reason for this complementarity is that a much higher fraction of a marginal dollar of US than of foreign spending falls on US output. As a result, a redistribution of world...

  14. EVALUATION OF ACCOUNT NUMBER PORTABILITY IMPLEMENTATION IN BANKING SECTOR OF TURKEY

    OpenAIRE

    Dirican, Cuneyt

    2017-01-01

    Is it possible to implement bank account number portability in banking industry just like telecommunication and pension system examples? In a mobile world where the customer behaviors and demands are changing rapidly, the idea of account number portability in banking industry, comparing with the aggressive competition in telco and pension industries, must be discussed as well. Account number portability in banking will have a huge impact on many business headlines. Risk management, money laun...

  15. Comparative Noise Performance of Portable Broadband Sensor Emplacements

    Science.gov (United States)

    Sweet, Justin; Arias-Dotson, Eliana; Beaudoin, Bruce; Anderson, Kent

    2015-04-01

    IRIS PASSCAL has supported portable broadband seismic experiments for close to 30 years. During that time we have seen a variety of sensor vaults deployed. The vaults deployed fall into two broad categories, a PASSCAL style vault and a Flexible Array style vault. The PASSCAL vault is constructed of materials available in-county and it is the Principle Investigator (PI) who establishes the actual field deployed design. These vaults generally are a large barrel placed in a ~1 m deep hole. A small pier, decoupled from the barrel, is fashioned in the bottom of the vault (either cement, paving stone or tile) for the sensor placement. The sensor is insulated and protected. Finally the vault is sealed and buried under ~30 cm of soil. The Flexible Array vault is provided to PIs by the EarthScope program, offering a uniform portable vault for these deployments. The vault consists of a 30 cm diameter by 0.75 cm tall piece of plastic sewage pipe buried with ~10 cm of pipe above grade. A rubber membrane covers the bottom and cement was poured into the bottom, coupling the pier to the pipe. The vault is sealed and buried under ~30 cm of soil. Cost, logistics, and the availability of materials in-country are usually the deciding factors for PIs when choosing a vault design and frequently trades are made given available resources. Recently a third type of portable broadband installation, direct burial, is being tested. In this case a sensor designed for shallow, direct burial is installed in a ~20 cm diameter by ~1 m deep posthole. Direct burial installation costs are limited to the time and effort required to dig the posthole and emplace the sensor. Our initial analyses suggest that direct burial sensors perform as well and at times better than sensor in vaults on both horizontal and vertical channels across a range of periods (<1 s to 100 s). Moving towards an instrument pool composed entirely of direct burial sensors (some with integrated digitizers) could yield higher

  16. The use of a portable electronic device in accident dosimetry.

    Science.gov (United States)

    Beerten, Koen; Vanhavere, Filip

    2008-01-01

    The use of a portable electronic device in accident dosimetry has been investigated. The thermoluminescence properties of a surface-mount alumina-rich ceramic resonator from a USB flash drive were investigated. The following characteristics were verified: the absence of a zero-dose signal, gamma dose response, dose recycling behaviour, fading and optical bleaching. Finally, this component has been successfully used to determine a simulated accident dose (1 d following the irradiation event). It is concluded that it should be possible to perform rapid and reliable accident dose assessments with such components using conventional thermoluminescence dosimetry equipment.

  17. Custom Integrated Circuit Design for Portable Ultrasound Scanners

    DEFF Research Database (Denmark)

    Llimos Muntal, Pere

    ) are contained in the probe. Due to the nature of ultrasonic transducers, the transmitting circuitry needs to generate high-voltage pulses to drive them. Furthermore, the low-voltage receiving circuitry has to provide high enough signal to noise ratio (SNR) in order to generate usable imaging. For the purpose...... of evaluating the feasibility of the transmitting and receiving circuitry of a handheld probe for portable ultrasound scanners, three integrated circuit prototypes have been fabricated. Measurements have been performed on all of them with satisfactory results. The first part of this project is focused...

  18. Helicopter mission optimization study. [portable computer technology for flight optimization

    Science.gov (United States)

    Olson, J. R.

    1978-01-01

    The feasibility of using low-cost, portable computer technology to help a helicopter pilot optimize flight parameters to minimize fuel consumption and takeoff and landing noise was demonstrated. Eight separate computer programs were developed for use in the helicopter cockpit using a hand-held computer. The programs provide the helicopter pilot with the ability to calculate power required, minimum fuel consumption for both range and endurance, maximum speed and a minimum noise profile for both takeoff and landing. Each program is defined by a maximum of two magnetic cards. The helicopter pilot is required to key in the proper input parameter such as gross weight, outside air temperature or pressure altitude.

  19. Evaluating Virtual Reality Mood Induction Procedures with Portable EEG Devices

    OpenAIRE

    Rodriguez Ortega, Alejandro; Rey Solaz, Beatriz; Alcañiz Raya, Mariano Luis

    2013-01-01

    Virtual Environments (VEs) have been used as mood induction procedures. In this context, it is necessary to have instruments to analyze the emotional state during VE exposure. Objective techniques such as EEG should be evaluated for this purpose. The aim in this work was to study the changes in the brain activity with a portable EEG device during a negative mood induction based on a VE. A virtual park was used to induce a negative mood (sadness) in ten participants. Changes in the brain activ...

  20. A design methodology for portable software on parallel computers

    Science.gov (United States)

    Nicol, David M.; Miller, Keith W.; Chrisman, Dan A.

    1993-01-01

    This final report for research that was supported by grant number NAG-1-995 documents our progress in addressing two difficulties in parallel programming. The first difficulty is developing software that will execute quickly on a parallel computer. The second difficulty is transporting software between dissimilar parallel computers. In general, we expect that more hardware-specific information will be included in software designs for parallel computers than in designs for sequential computers. This inclusion is an instance of portability being sacrificed for high performance. New parallel computers are being introduced frequently. Trying to keep one's software on the current high performance hardware, a software developer almost continually faces yet another expensive software transportation. The problem of the proposed research is to create a design methodology that helps designers to more precisely control both portability and hardware-specific programming details. The proposed research emphasizes programming for scientific applications. We completed our study of the parallelizability of a subsystem of the NASA Earth Radiation Budget Experiment (ERBE) data processing system. This work is summarized in section two. A more detailed description is provided in Appendix A ('Programming Practices to Support Eventual Parallelism'). Mr. Chrisman, a graduate student, wrote and successfully defended a Ph.D. dissertation proposal which describes our research associated with the issues of software portability and high performance. The list of research tasks are specified in the proposal. The proposal 'A Design Methodology for Portable Software on Parallel Computers' is summarized in section three and is provided in its entirety in Appendix B. We are currently studying a proposed subsystem of the NASA Clouds and the Earth's Radiant Energy System (CERES) data processing system. This software is the proof-of-concept for the Ph.D. dissertation. We have implemented and measured

  1. Portable reflection for C++ with the Mirror library

    Directory of Open Access Journals (Sweden)

    Matus Chochlik

    2012-06-01

    Full Text Available Reflection and reflective programming can be used for a wide range of tasks such as implementationof serialization-like operations, remote procedure calls, scripting, automated GUIgeneration,implementation of several software design patterns, etc. C++ as one of the mostprevalent programming languages however, for various reasons, lacks a standardized reflectionfacility. In this paper we present Mirror - a portable library adding reflection to C++ with acommand-line utility automating its usage. This library supports functional style static compiletimereflection and metaprogramming and also provides two different object-oriented run-timepolymorphic layers for dynamic reflection.

  2. Design and Test of Portable Hyperspectral Imaging Spectrometer

    Directory of Open Access Journals (Sweden)

    Chunbo Zou

    2017-01-01

    Full Text Available We design and implement a portable hyperspectral imaging spectrometer, which has high spectral resolution, high spatial resolution, small volume, and low weight. The flight test has been conducted, and the hyperspectral images are acquired successfully. To achieve high performance, small volume, and regular appearance, an improved Dyson structure is designed and used in the hyperspectral imaging spectrometer. The hyperspectral imaging spectrometer is suitable for the small platform such as CubeSat and UAV (unmanned aerial vehicle, and it is also convenient to use for hyperspectral imaging acquiring in the laboratory and the field.

  3. Portable two-channel PPG cardiovascular sensor device

    Science.gov (United States)

    Spigulis, Janis; Erts, Renars; Ozols, Maris

    2003-10-01

    A portable sensor device for simultaneous detection and processing of skin-remitted optical signals from any two sites of the body has been developed and tested. The photoplethysmography (PPG) principle was applied to follow the dilatation and contraction of skin blood vessels during the cardiac cycle. The newly developed two-channel approach allows to estimate the vascular blood flow resistance by analysis of time shifts between the PPG pulses detected at different body sites. Potential of the sensor device for express-assessment of human cardio-vascular condition and for body fitness tests has been demonstrated.

  4. Portable suction unit failure in a rural EMS system.

    Science.gov (United States)

    Risavi, Brian L; Sabotchick, K J; Heile, Christopher J

    2013-08-01

    Portable suction units used by EMS personnel are utilized infrequently and often are powered by batteries. Lack of use and inspection often results in failure of the device when it is needed. The purpose of this study was to examine the incidence of portable suction unit failure in a rural EMS system and to identify the reasons for failures. A convenience sample was obtained through both random inspections by the staff of a regional EMS council and data from twice monthly checks reported by respective EMS agencies following a standard protocol for each unit. A standard protocol was used, including checking the vacuum level on each suction unit and inspecting the tubing, canister, and battery. Each inspector assessed whether the unit was capable of achieving 300 mmHg of suction within four seconds. Also, the unit was inspected for any signs of misalignment or dry rot of the gasket, kinking of suction hose, damage to the suction canister, weak/dead battery, or defective pump. Findings were recorded. Over a two-year period, 9,631 suction unit inspections were completed. There were 233 failures (2.4%) noted. The majority (126, 54.1%) were due to battery failure. Seventy-three units failed due to other reasons (not recorded, switch failure, battery not seated). Ten inspections failed due to incorrect assembly. Nineteen inspections failed due to defects with the suction canister. Five inspections failed due to kinked/disconnected suction tubing. Only a relatively small percentage of inspections of suction units revealed failures (4.6% Advanced Life Support, 8.6% Basic Life Support) using the above-stated criteria. However, given the importance of airway management and potential complications associated with airway compromise, including aspiration pneumonia, hypoxia, and hemodynamic instability, this is of concern relative to the morbidity and mortality that could be related to airway failure. Due to the relative infrequency of use and the nature of portable suction units

  5. Portable digital video surveillance system for monitoring flower-visiting bumblebees

    Directory of Open Access Journals (Sweden)

    Thorsdatter Orvedal Aase, Anne Lene

    2011-08-01

    Full Text Available In this study we used a portable event-triggered video surveillance system for monitoring flower-visiting bumblebees. The system consist of mini digital recorder (mini-DVR with a video motion detection (VMD sensor which detects changes in the image captured by the camera, the intruder triggers the recording immediately. The sensitivity and the detection area are adjustable, which may prevent unwanted recordings. To our best knowledge this is the first study using VMD sensor to monitor flower-visiting insects. Observation of flower-visiting insects has traditionally been monitored by direct observations, which is time demanding, or by continuous video monitoring, which demands a great effort in reviewing the material. A total of 98.5 monitoring hours were conducted. For the mini-DVR with VMD, a total of 35 min were spent reviewing the recordings to locate 75 pollinators, which means ca. 0.35 sec reviewing per monitoring hr. Most pollinators in the order Hymenoptera were identified to species or group level, some were only classified to family (Apidae or genus (Bombus. The use of the video monitoring system described in the present paper could result in a more efficient data sampling and reveal new knowledge to pollination ecology (e.g. species identification and pollinating behaviour.

  6. 24 CFR 882.410 - Rent adjustments.

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 4 2010-04-01 2010-04-01 false Rent adjustments. 882.410 Section... Policies § 882.410 Rent adjustments. (a) Annual and special adjustments. Contract Rents will be adjusted as... schedule of Contract Rents, provided that the unit is in decent, safe, and sanitary condition and that the...

  7. 12 CFR 19.240 - Inflation adjustments.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Inflation adjustments. 19.240 Section 19.240... PROCEDURE Civil Money Penalty Inflation Adjustments § 19.240 Inflation adjustments. (a) The maximum amount... Civil Penalties Inflation Adjustment Act of 1990 (28 U.S.C. 2461 note) as follows: ER10NO08.001 (b) The...

  8. Adjusting to University: The Hong Kong Experience

    Science.gov (United States)

    Yau, Hon Keung; Sun, Hongyi; Cheng, Alison Lai Fong

    2012-01-01

    Students' adjustment to the university environment is an important factor in predicting university outcomes and is crucial to their future achievements. University support to students' transition to university life can be divided into three dimensions: academic adjustment, social adjustment and psychological adjustment. However, these…

  9. Microminiature linear split Stirling cryogenic cooler for portable infrared imagers

    Science.gov (United States)

    Veprik, A.; Vilenchik, H.; Riabzev, S.; Pundak, N.

    2007-04-01

    Novel tactics employed in carrying out military and antiterrorist operations call for the development of a new generation of warfare, among which sophisticated portable infrared (IR) imagers for surveillance, reconnaissance, targeting and navigation play an important role. The superior performance of such imagers relies on novel optronic technologies and maintaining the infrared focal plane arrays at cryogenic temperatures using closed cycle refrigerators. Traditionally, rotary driven Stirling cryogenic engines are used for this purpose. As compared to their military off-theshelf linear rivals, they are lighter, more compact and normally consume less electrical power. Latest technological advances in industrial development of high-temperature (100K) infrared detectors initialized R&D activity towards developing microminiature cryogenic coolers, both of rotary and linear types. On this occasion, split linearly driven cryogenic coolers appear to be more suitable for the above applications. Their known advantages include flexibility in the system design, inherently longer life time, low vibration export and superior aural stealth. Moreover, recent progress in designing highly efficient "moving magnet" resonant linear drives and driving electronics enable further essential reduction of the cooler size, weight and power consumption. The authors report on the development and project status of a novel Ricor model K527 microminiature split Stirling linear cryogenic cooler designed especially for the portable infrared imagers.

  10. Portable ECG design and application based on wireless sensor network

    Directory of Open Access Journals (Sweden)

    Gül Fatma TÜRKER

    2016-05-01

    Full Text Available In this study, in order to follow the heart signals of patients that needs to be monitored instantly and continuously without mobility restrictions, a portable electrocardiogram circuit is designed. After performing the detection, upgrading, cleaning and digitizing of ECG signal received from patient via disposable electrodes, ECG signals was performed that transmit to a central node with Wireless Sensor Network (WSN based on ZigBee 802.11.4 standard. Central node is connected to the serial port of a computer. Received data from the central node is processed on computer and continuous flow graph is obtained. The obligation to use wires for tracing patients’ ECG has been removed with this portable system. As it can be seen in this study, thanks to WSN’s property of forming network by itself and its augmentable loop property, the restrain of ECG signals to reach far away distances can be surmounted. The transmission of biological signals with WSN will light on many studies that follow of patients from a distance.

  11. Adaptive OpenCL libraries for platform portability

    Science.gov (United States)

    Fox, Paul A.; Batten, Allyssa L.; Hayes, Marcus; Kelmelis, Eric J.

    2015-05-01

    The OpenCL API provides an abstract mechanism for massively parallel programming on a very wide range of hardware, including traditional CPUs, GPUs, accelerator devices, FPGAs, and more. However, these different hardware architectures and platforms function quite differently. Therefore, coding OpenCL applications that are usefully portable is challenging. Certain considerations are therefore required in developing an effectively portable OpenCL library to enable parallel application development without requiring fully separate code paths for each target platform. By making use of device detection and characterization provided by the OpenCL API, valuable information can be obtained to make runtime decisions for optimization. In particular, the effects of memory affinity change depending on the memory organization of the device architecture. Work partitioning and assignment depend on the device execution model, in particular the types of parallel execution supported and available synchronization primitives. These considerations, in turn, affect the selection and invocation of kernel code. For certain devices, platform-specific libraries are available, while others can benefit from generated kernel code based on the specified device parameters. By parameterizing an algorithm based on how these considerations affect performance, a combination of device parameters can be used to produce an execution strategy that will provide improved performance for that device or collection of devices.

  12. Biosensors and bioelectronics on smartphone for portable biochemical detection.

    Science.gov (United States)

    Zhang, Diming; Liu, Qingjun

    2016-01-15

    Smartphone has been widely integrated with sensors, such as test strips, sensor chips, and hand-held detectors, for biochemical detections due to its portability and ubiquitous availability. Utilizing built-in function modules, smartphone is often employed as controller, analyzer, and displayer for rapid, real-time, and point-of-care monitoring, which can significantly simplify design and reduce cost of the detecting systems. This paper presents a review of biosensors and bioelectronics on smartphone for portable biochemical detections. The biosensors and bioelectronics based on smartphone can mainly be classified into biosensors using optics, surface plasmon resonance, electrochemistry, and near-field communication. The developments of these biosensors and bioelectronics on smartphone are reviewed along with typical biochemical detecting cases. Sensor strategies, detector attachments, and coupling methods are highlighted to show designs of the compact, lightweight, and low-cost sensor systems. The performances and advantages of these designs are introduced with their applications in healthcare diagnosis, environment monitoring, and food evaluation. With advances in micro-manufacture, sensor technology, and miniaturized electronics, biosensor and bioelectronic devices on smartphone can be used to perform biochemical detections as common and convenient as electronic tag readout in foreseeable future. Copyright © 2015 Elsevier B.V. All rights reserved.

  13. Manycore Performance-Portability: Kokkos Multidimensional Array Library

    Directory of Open Access Journals (Sweden)

    H. Carter Edwards

    2012-01-01

    Full Text Available Large, complex scientific and engineering application code have a significant investment in computational kernels to implement their mathematical models. Porting these computational kernels to the collection of modern manycore accelerator devices is a major challenge in that these devices have diverse programming models, application programming interfaces (APIs, and performance requirements. The Kokkos Array programming model provides library-based approach to implement computational kernels that are performance-portable to CPU-multicore and GPGPU accelerator devices. This programming model is based upon three fundamental concepts: (1 manycore compute devices each with its own memory space, (2 data parallel kernels and (3 multidimensional arrays. Kernel execution performance is, especially for NVIDIA® devices, extremely dependent on data access patterns. Optimal data access pattern can be different for different manycore devices – potentially leading to different implementations of computational kernels specialized for different devices. The Kokkos Array programming model supports performance-portable kernels by (1 separating data access patterns from computational kernels through a multidimensional array API and (2 introduce device-specific data access mappings when a kernel is compiled. An implementation of Kokkos Array is available through Trilinos [Trilinos website, http://trilinos.sandia.gov/, August 2011].

  14. Portable Multispectral Colorimeter for Metallic Ion Detection and Classification

    Science.gov (United States)

    Jaimes, Ruth F. V. V.; Borysow, Walter; Gomes, Osmar F.; Salcedo, Walter J.

    2017-01-01

    This work deals with a portable device system applied to detect and classify different metallic ions as proposed and developed, aiming its application for hydrological monitoring systems such as rivers, lakes and groundwater. Considering the system features, a portable colorimetric system was developed by using a multispectral optoelectronic sensor. All the technology of quantification and classification of metallic ions using optoelectronic multispectral sensors was fully integrated in the embedded hardware FPGA ( Field Programmable Gate Array) technology and software based on virtual instrumentation (NI LabView®). The system draws on an indicative colorimeter by using the chromogen reagent of 1-(2-pyridylazo)-2-naphthol (PAN). The results obtained with the signal processing and pattern analysis using the method of the linear discriminant analysis, allows excellent results during detection and classification of Pb(II), Cd(II), Zn(II), Cu(II), Fe(III) and Ni(II) ions, with almost the same level of performance as for those obtained from the Ultravioled and visible (UV-VIS) spectrophotometers of high spectral resolution. PMID:28788082

  15. Portable exothermal energy source for disaster relief operations

    Science.gov (United States)

    Zimbeck, Walter R.

    1994-03-01

    This manuscript describes an example of transfer technology from a U.S. Government Laboratory to commercial products that meet national needs in the public safety and health care sectors. Funded by the U.S. Army, the first project is the development of a portable, non-powered food warming device for serving meals to soldiers in the field. The second project is being funded by the National Institutes of Health for development of a heat therapy device for relief from rheumatoid arthritis discomfort in the hands and other affected joints. Both of these heating devices are portable, reusable heat pack products that can be regenerated in a microwave oven or in boiling water. The knowledge developed during these two projects will be applied to many other related products. Applications in support of natural and manmade disaster relief include food warming heat packs for food service to victims and rescue workers in sustained black-out conditions, and heat pack warming blankets for emergency medical situations in which patients are in traumatic shock and the onset of hypothermia is imminent.

  16. Micro-Fuel Cells{sup TM} for portable electronics

    Energy Technology Data Exchange (ETDEWEB)

    Hockaday, R.G.; DeJohn, M.; Navas, C.; Turner, P.S.; Vaz, H.L.; Vazul, L.L. [Energy Related Devices Inc., Los Alamos, NM (United States)

    2000-05-01

    The Micro-Fuel Cell{sup TM} is a new power supply which provides a superior alternative compared to rechargeable batteries. A prototype has been developed by Manhattan Scientifics Inc. in collaboration with Energy Related Devices Inc. This mass-producible high-energy power supply can be used for cellular telephones, portable computers and other portable devices. Instead of being recharged, it can be easily refueled with methanol. The approach taken in designing this product was to develop a competitive product with definite advantages over existing products. The Micro-Fuel Cell{sup TM} is based on the idea that a fuel cell can be built onto an engineered microplastic substrate. In this case, the integrated design makes use of thin film vacuum deposition techniques to coat patterned, etched-nuclear-particle-track plastic membranes. This process forms catalytically active surface area electrodes on either side of a single structured proton-exchange-membrane electrolyte. Methanol was the choice fuel for this system because compared to hydrogen and metal hydrides, it was considered to be safer and more compact. In addition, the theoretical specific energy of methanol is significantly higher than for lithium-ion batteries. The problem of crossover, whereby methanol fuel diffuses across the fuel cell from the anode to the cathode, has also been solved by using a selectively permeable membrane. 5 refs., 4 figs.

  17. Noise-induced hearing loss and portable radios with headphones.

    Science.gov (United States)

    Catalano, P J; Levin, S M

    1985-06-01

    Portable radio/cassette players with headphones have gained increasing popularity in recent years. Volume settings are often increased to override environmental noise, perhaps placing the listener at risk for noise-induced hearing loss (NIHL). A total of 190 public college students in NYC were studied via a self-administered questionnaire regarding the volume setting used and weekly exposure in hours to these units. Three popular models were tested using a Bruel and Kjaer sound level meter, octave band filter and artificial ear. Sound levels were measured at various frequencies (250-8000 Hz) and an overall measurement obtained using the "A"-weighted scale. Based on OSHA criteria for permissible noise dose (i.e. intensity X duration) in the work place, auditory risk criteria were developed. Of all students who used such radios 31.4% equalled or exceeded the maximum allowable dose permitted by these criteria (41.2% of the males and 29.2% of females). This sex-related difference in risk, while not statistically significant, warrants further investigation. Of the total 'at risk' group 50% exceeded the risk criteria by more than 100%. These results suggest that portable radios with headphones may be capable of causing permanent hearing loss in a large proportion of radio users.

  18. OPERATING PROCEDURE FOR THE PORTABLE ACOUSTIC MONITORING PACKAGE (PAMP)

    Energy Technology Data Exchange (ETDEWEB)

    John L. Loth; Gary J. Morris; George M. Palmer; Richard Guiler; Patrick Browning

    2004-08-29

    The Portable Acoustic Monitoring Package (PAMP) has been designed to record and monitor acoustic signals in high-pressure natural gas (NG) transmission lines. Of particular interest are the three acoustic signals associated with a pipeline fracture. The system is portable (less than 30 lbm) and can be used at all line pressures up to 1000 psig. The PAMP requires a shut-off valve equipped 1/2 inch NPT access port in the pipeline. It is fully functional over the typical pressure range found in the natural gas transmission pipelines in the West Virginia, Virginia, Pennsylvania, and Ohio areas. With the use of the PAMP, a full spectrum of acoustic signals can be recorded and defined in terms of acoustic energy in decibels. To detect natural gas pipeline infringements and leaks, the acoustic energy generated inside the line is monitored with a sensitive pressure-equalized microphone and a step function type {Delta}p transducer. The assembly is mounted on a 1000 psig pipe fitting-tree called the PAMP. The electronics required to record, store and analyze the data are described within this report in the format of an operating manual.

  19. [Decrease of hearing acuity from use of portable headphones].

    Science.gov (United States)

    Kawada, T; Koyama, H; Suzuki, S

    1990-01-01

    The association between headphone use and hearing acuity was studied among 155 medical students aged 22-29 years. Hearing levels were measured and subjects were classified into three groups: A: n = 14), off-line or portable headphone users (group B: n = 16), and the control group. Past or present headphone use frequency for group A and B is two or more times per week, with an average duration of 30-120 minutes per use. No significant differences between mean hearing acuity of the three groups were found by one-way analysis of variance. After standardization of the average hearing acuity of the control group to 0 dB, group A or B levels were plotted for each of the octave band frequencies. The mean hearing acuity at 4,000 Hz of group B showed a tendency of being lower than that of the control group. Further, percentages of group B members whose hearing acuity decreased 15, 25, 30 dB or more were significantly larger than those of the control. These results suggest that more than 10% of the young generation is at risk for damaged hearing acuity from use of portable headphones.

  20. Development of a portable mid-infrared methane detection device

    Science.gov (United States)

    Liu, Hui-fang; He, Qi-xin; Zheng, Chuan-tao; Wang, Yi-ding

    2017-03-01

    Based on direct absorption spectroscopy (DAS), a portable methane (CH4) detection device was implemented. The device mainly includes a dual-channel non-dispersive infrared sensor (integrated with an infrared light source, light path and pyroelectric detector), a driving circuit of the sensor, an ARM11 embedded WinCE system, and a LabVIEW-based data-processing platform. Experiments were carried out with prepared CH4 samples to investigate the sensing performance. The relative detection error is less than 9.14% within the measuring range of 0—7×10-2. For a CH4 sample with concentration of 0 (i.e., pure nitrogen), the measured concentration fluctuation range is -1.2×10-5—+2×10-5. An Allan deviation analysis on the gas sample with concentration of 0 indicates that the 1 σ limit of detection ( LoD) of the device is 4.8×10-6 with an average time of 1 s. Experiments were performed on three CH4 samples with different concentrations to test the response time, which is validated to be less than 20 s. Due to the small size of the ARM11 embedded system and the powerful data processing capability of the LabVIEW platform, the proposed portable and miniaturized CH4 sensor shows a good application prospect in mining operations and some other industrial fields.

  1. A study on a portable fluorescence imaging system

    Science.gov (United States)

    Chang, Han-Chao; Wu, Wen-Hong; Chang, Chun-Li; Huang, Kuo-Cheng; Chang, Chung-Hsing; Chiu, Shang-Chen

    2011-09-01

    The fluorescent reaction is that an organism or dye, excited by UV light (200-405 nm), emits a specific frequency of light; the light is usually a visible or near infrared light (405-900 nm). During the UV light irradiation, the photosensitive agent will be induced to start the photochemical reaction. In addition, the fluorescence image can be used for fluorescence diagnosis and then photodynamic therapy can be given to dental diseases and skin cancer, which has become a useful tool to provide scientific evidence in many biomedical researches. However, most of the methods on acquiring fluorescence biology traces are still stay in primitive stage, catching by naked eyes and researcher's subjective judgment. This article presents a portable camera to obtain the fluorescence image and to make up a deficit from observer competence and subjective judgment. Furthermore, the portable camera offers the 375nm UV-LED exciting light source for user to record fluorescence image and makes the recorded image become persuasive scientific evidence. In addition, when the raising the rate between signal and noise, the signal processing module will not only amplify the fluorescence signal up to 70 %, but also decrease the noise significantly from environmental light on bill and nude mouse testing.

  2. Portable LED-induced autofluorescence spectroscopy for oral cancer diagnosis

    Science.gov (United States)

    Yan, Yung-Jhe; Huang, Ting-Wei; Cheng, Nai-Lun; Hsieh, Yao-Fang; Tsai, Ming-Hsui; Chiou, Jin-Chern; Duann, Jeng-Ren; Lin, Yung-Jiun; Yang, Chin-Siang; Ou-Yang, Mang

    2017-04-01

    Oral cancer is a serious and growing problem in many developing and developed countries. To improve the cancer screening procedure, we developed a portable light-emitting-diode (LED)-induced autofluorescence (LIAF) imager that contains two wavelength LED excitation light sources and multiple filters to capture ex vivo oral tissue autofluorescence images. Compared with conventional means of oral cancer diagnosis, the LIAF imager is a handier, faster, and more highly reliable solution. The compact design with a tiny probe allows clinicians to easily observe autofluorescence images of hidden areas located in concave deep oral cavities. The ex vivo trials conducted in Taiwan present the design and prototype of the portable LIAF imager used for analyzing 31 patients with 221 measurement points. Using the normalized factor of normal tissues under the excitation source with 365 nm of the central wavelength and without the bandpass filter, the results revealed that the sensitivity was larger than 84%, the specificity was not smaller than over 76%, the accuracy was about 80%, and the area under curve of the receiver operating characteristic (ROC) was achieved at about 87%, respectively. The fact shows the LIAF spectroscopy has the possibilities of ex vivo diagnosis and noninvasive examinations for oral cancer.

  3. Portable Multispectral Colorimeter for Metallic Ion Detection and Classification

    Directory of Open Access Journals (Sweden)

    Mauro S. Braga

    2017-07-01

    Full Text Available This work deals with a portable device system applied to detect and classify different metallic ions as proposed and developed, aiming its application for hydrological monitoring systems such as rivers, lakes and groundwater. Considering the system features, a portable colorimetric system was developed by using a multispectral optoelectronic sensor. All the technology of quantification and classification of metallic ions using optoelectronic multispectral sensors was fully integrated in the embedded hardware FPGA ( Field Programmable Gate Array technology and software based on virtual instrumentation (NI LabView®. The system draws on an indicative colorimeter by using the chromogen reagent of 1-(2-pyridylazo-2-naphthol (PAN. The results obtained with the signal processing and pattern analysis using the method of the linear discriminant analysis, allows excellent results during detection and classification of Pb(II, Cd(II, Zn(II, Cu(II, Fe(III and Ni(II ions, with almost the same level of performance as for those obtained from the Ultravioled and visible (UV-VIS spectrophotometers of high spectral resolution.

  4. Development of a heavy duty portable variable power supply (HPVPS)

    Science.gov (United States)

    Musa, Ahmad Zulfadli Bin; Lung, Chong Man; Abidin, Wan'Amirah Basyarah Binti Zainol

    2017-08-01

    This paper covers the innovation of a Heavy Duty Portable Variable Power Supply (HPVPS) in Jabatan Kejuruteraan Elektrik (JKE), Politeknik Mukah, Sarawak (PMU). This project consists of variable power supply which can vary the output from 1.2 V to 11.6V, AC pure wave inverter to convert DC to AC for the operation of low power home appliances and also used Li-on rechargeable batteries to store the electrical energy and additional feature that can be used to jump-start the batteries of the car. The main objective of this project is to make the user can operate the electronic devices anywhere whenever if no electricity while doing their lab activities. Most of the regulated power supply in JKE lab aged 9-10 years old and need periodical maintenance and need cost and also the unit can be used is not enough to support the whole class during lab activities. As a result, the P&P process will be facing the major problem in order to make the lab activities running smoothly. By development of the portable variable power supply, the P&P process is more efficient and very helpful.

  5. A Field Portable Hyperspectral Goniometer for Coastal Characterization

    Science.gov (United States)

    Bachmann, Charles M.; Gray, Deric; Abelev, Andrei; Philpot, William; Fusina, Robert A.; Musser, Joseph A.; Vermillion, Michael; Doctor, Katarina; White, Maurice; Georgiev, Georgi

    2012-01-01

    During an airborne multi-sensor remote sensing experiment at the Virginia Coast Reserve (VCR) Long Term Ecological Research (LTER) site in June 2011 (VCR '11), first measurements were taken with the new NRL Goniometer for Outdoor Portable Hyperspectral Earth Reflectance (GOPHER). GOPHER measures the angular distribution of hyperspectral reflectance. GOPHER was constructed for NRL by Spectra Vista Corporation (SVC) and the University of Lethbridge through a capital equipment purchase in 2010. The GOPHER spectrometer is an SVC HR -1024, which measures hyperspectral reflectance over the range from 350 -2500 nm, the visible, near infrared, and short-wave infrared. During measurements, the spectrometer travels along a zenith quarter -arc track that can rotate in azimuth, allowing for measurement of the bi-directional reflectance distribution function (BRDF) over the whole hemisphere. The zenith arc has a radius of approximately 2m, and the spectrometer scan pattern can be programmed on the fly during calibration and validation efforts. The spectrometer and zenith arc assembly can be raised and lowered along a mast to allow for measurement of uneven terrain or vegetation canopies of moderate height. Hydraulics on the chassis allow for leveling of the instrument in the field. At just over 400 lbs, GOPHER is a field portable instrument and can be transformed into a compact trailer assembly for movement over long distances in the field.

  6. A next generation field-portable goniometer system

    Science.gov (United States)

    Harms, Justin D.; Bachmann, Charles M.; Faulring, Jason W.; Ruiz Torres, Andres J.

    2016-05-01

    Various field portable goniometers have been designed to capture in-situ measurements of a materials bi-directional reflectance distribution function (BRDF), each with a specific scientific purpose in mind.1-4 The Rochester Institute of Technology's (RIT) Chester F. Carlson Center for Imaging Science recently created a novel instrument incorporating a wide variety of features into one compact apparatus in order to obtain very high accuracy BRDFs of short vegetation and sediments, even in undesirable conditions and austere environments. This next generation system integrates a dual-view design using two VNIR/SWIR pectroradiometers to capture target reflected radiance, as well as incoming radiance, to provide for better optical accuracy when measuring in non-ideal atmospheric conditions or when background illumination effects are non-negligible. The new, fully automated device also features a laser range finder to construct a surface roughness model of the target being measured, which enables the user to include inclination information into BRDF post-processing and further allows for roughness effects to be better studied for radiative transfer modeling. The highly portable design features automatic leveling, a precision engineered frame, and a variable measurement plane that allow for BRDF measurements on rugged, un-even terrain while still maintaining true angular measurements with respect to the target, all without sacrificing measurement speed. Despite the expanded capabilities and dual sensor suite, the system weighs less than 75 kg, which allows for excellent mobility and data collection on soft, silty clay or fine sand.

  7. Portable reconfigurable line sensor (PRLS) and technology transfer

    Energy Technology Data Exchange (ETDEWEB)

    MacKenzie, D.P. [Air Force Electronic Systems Center, Hanscom AFB, MA (United States); Buckle, T.H. [Sandia National Labs., Albuquerque, NM (United States); Blattman, D.A. [Racon, Inc., Seattle, WA (United States)

    1993-12-31

    The Portable Reconfigurable Line Sensor (PRLS) is a bistatic, pulsed-Doppler, microwave intrusion detection system developed at Sandia National Laboratories for the US Air Force. The PRLS is rapidly and easily deployed, and can detect intruders ranging from a slow creeping intruder to a high speed vehicle. The system has a sharply defined detection zone and will not falsely alarm on nearby traffic. Unlike most microwave sensors, the PRLS requires no alignment or calibration. Its portability, battery operation, ease of setup, and RF alarm reporting capability make it an excellent choice for perimeter, portal, and gap-filler applications in the important new field of rapidly-deployable sensor systems. In October 1992, the US Air Force and Racon, Inc., entered into a Cooperative Research and Development Agreement (CRADA) to commercialize the PRLS, jointly sharing government and industry resources. The Air Force brings the user`s perspective and requirements to the cooperative effort. Sandia, serving as the technical arm of the Air Force, adds the actual PRLS technology to the joint effort, and provides security systems and radar development expertise. Racon puts the Air Force requirements and Sandia technology together into a commercial product, making the system meet important commercial manufacturing constraints. The result is a true ``win-win`` situation, with reduced government investment during the commercial development of the PRLS, and industry access to technology not otherwise available.

  8. Acceptance test report for portable exhauster POR-008/Skid F

    Energy Technology Data Exchange (ETDEWEB)

    Kriskovich, J.R.

    1998-07-24

    Portable Exhauster POR-008 was procured via HNF-0490, Specification for a Portable Exhausted System for Waste Tank Ventilation. Prior to taking ownership, acceptance testing was performed at the vendors. However at the conclusion of testing a number of issues remained that required resolution before the exhausters could be used by Project W-320. The purpose of acceptance testing documented by this report was to demonstrate compliance of the exhausters with the performance criteria established within HNF-O49O, Rev. 1 following a repair and upgrade effort at Hanford. In addition, data obtained during this testing is required for the resolution of outstanding Non-conformance Reports (NCR), and finally, to demonstrate the functionality of the associated software for the pressure control and high vacuum exhauster operating modes provided for by W-320. Additional testing not required by the ATP was also performed to assist in the disposition and close out of receiving inspection report and for application design information (system curve). Results of this testing are also captured within this document.

  9. A portable fluorescence microscopic imaging system for cholecystectomy

    Science.gov (United States)

    Ye, Jian; Yang, Chaoyu; Gan, Qi; Ma, Rong; Zhang, Zeshu; Chang, Shufang; Shao, Pengfei; Zhang, Shiwu; Liu, Chenhai; Xu, Ronald

    2016-03-01

    In this paper we proposed a portable fluorescence microscopic imaging system to prevent iatrogenic biliary injuries from occurring during cholecystectomy due to misidentification of the cystic structures. The system consisted of a light source module, a CMOS camera, a Raspberry Pi computer and a 5 inch HDMI LCD. Specifically, the light source module was composed of 690 nm and 850 nm LEDs, allowing the CMOS camera to simultaneously acquire both fluorescence and background images. The system was controlled by Raspberry Pi using Python programming with the OpenCV library under Linux. We chose Indocyanine green(ICG) as a fluorescent contrast agent and then tested fluorescence intensities of the ICG aqueous solution at different concentration levels by our fluorescence microscopic system compared with the commercial Xenogen IVIS system. The spatial resolution of the proposed fluorescence microscopic imaging system was measured by a 1951 USAF resolution target and the dynamic response was evaluated quantitatively with an automatic displacement platform. Finally, we verified the technical feasibility of the proposed system in mouse models of bile duct, performing both correct and incorrect gallbladder resection. Our experiments showed that the proposed system can provide clear visualization of the confluence between the cystic duct and common bile duct or common hepatic duct, suggesting that this is a potential method for guiding cholecystectomy. The proposed portable system only cost a total of $300, potentially promoting its use in resource-limited settings.

  10. A portable integrated system to control an active needle

    Science.gov (United States)

    Konh, Bardia; Motalleb, Mahdi; Ashrafiuon, Hashem

    2017-04-01

    The primary objective of this work is to introduce an integrated portable system to operate a flexible active surgical needle with actuation capabilities. The smart needle uses the robust actuation capabilities of the shape memory alloy wires to drastically improve the accuracy of in medical procedures such as brachytherapy. This, however, requires an integrated system aimed to control the insertion of the needle via a linear motor and its deflection by the SMA wire in real-time. The integrated system includes a flexible needle prototype, a Raspberry Pi computer, a linear stage motor, an SMA wire actuator, a power supply, electromagnetic tracking system, and various communication supplies. The linear stage motor guides the needle into tissue. The power supply provides appropriate current to the SMA actuator. The tracking system measures tip movement for feedback, The Raspberry Pi is the central tool that receives the tip movement feedback and controls the linear stage motor and the SMA actuator via the power supply. The implemented algorithms required for communication and feedback control are also described. This paper demonstrates that the portable integrated system may be a viable solution for more effective procedures requiring surgical needles.

  11. A micro solar heater for portable energy generation

    Science.gov (United States)

    Zimmerman, Raúl; Morrison, Graham; The, Owen; Rosengarten, Gary

    2007-12-01

    This study presents a new concept that combines microtechnology with solar thermal energy to provide a free portable energy source. A water-methanol mixture flows through an array of parallel microchannels which are fabricated into a silicon matrix using conventional micro-fabrication techniques. A vacuum layer is interposed between the channels and the external surface to thermally insulate the channels from the ambient temperature. A selective coating is deposited on one of the vacuum walls to absorb the short wavelength incoming radiation and reduce the long wavelength radiation, hence reducing the heat losses. A geometry and material optimization is still being developed in order to obtain the highest possible efficiency for the micro-heater, while keeping a low pressure drop in the micro-channels. The methanol outlet temperature is predicted to be higher than 250°C. This temperature is required for hydrogen production in a methanol reforming micro-reactor. Therefore, it is envisaged that the micro-solar heater will supply the thermal energy needed for hydrogen generation, that can later be used as fuel for microfuel cells. Both technologies can be integrated in a portable device.

  12. Faster imaging with a portable unilateral NMR device.

    Science.gov (United States)

    Liberman, Asaf; Bergman, Elad; Sarda, Yifat; Nevo, Uri

    2013-06-01

    Unilateral NMR devices are important tools in various applications such as non-destructive testing and well logging, but are not applied routinely for imaging, primarily because B0 inhomogeneity in these scanners leads to a relatively low signal and requires use of the slow single point imaging scan scheme. Enabling high quality, fast imaging could make this affordable and portable technology practical for various imaging applications as well as for new applications that are not yet feasible with MRI technology. The goal of this work was to improve imaging times in a portable unilateral NMR scanner. Both Compressed Sensing and Fast Spin Echo were modified and applied to fit the unique characteristics of a unilateral device. Two printed phantoms, allowing high resolution images, were scanned with both methods and compared to a standard scan and to a low pass scan to evaluate performance. Both methods were found to be feasible with a unilateral device, proving ways to accelerate single point imaging in such scanners. This outcome encourages us to explore how to further accelerate imaging times in unilateral NMR devices so that this technology might become clinically applicable in the future. Copyright © 2013 Elsevier Inc. All rights reserved.

  13. Free-Space Quantum Communication with a Portable Quantum Memory

    Science.gov (United States)

    Namazi, Mehdi; Vallone, Giuseppe; Jordaan, Bertus; Goham, Connor; Shahrokhshahi, Reihaneh; Villoresi, Paolo; Figueroa, Eden

    2017-12-01

    The realization of an elementary quantum network that is intrinsically secure and operates over long distances requires the interconnection of several quantum modules performing different tasks. In this work, we report the realization of a communication network functioning in a quantum regime, consisting of four different quantum modules: (i) a random polarization qubit generator, (ii) a free-space quantum-communication channel, (iii) an ultralow-noise portable quantum memory, and (iv) a qubit decoder, in a functional elementary quantum network possessing all capabilities needed for quantum-information distribution protocols. We create weak coherent pulses at the single-photon level encoding polarization states |H ⟩ , |V ⟩, |D ⟩, and |A ⟩ in a randomized sequence. The random qubits are sent over a free-space link and coupled into a dual-rail room-temperature quantum memory and after storage and retrieval are analyzed in a four-detector polarization analysis akin to the requirements of the BB84 protocol. We also show ultralow noise and fully portable operation, paving the way towards memory-assisted all-environment free-space quantum cryptographic networks.

  14. Development of a portable field monitor for PCBs. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Bostick, W.D.; Denton, M.S.; Dinsmore, S.R.

    1983-01-01

    With the advent of recent regulations and those yet pending concerning allowable concentrations of polychlorinated biphenyls (PCBs), personnel in all aspects of the electric power industry, analytical support personnel, and those in the regulatory functions themselves have realized that the PCB problem, as well as these associated regulations, has far surpassed available monitoring capability. In short, detailed, stringent regulations are being set for contamination levels where no accepted ASTM procedure or instrumentation exists. The largest PCB problems occur in the form of PCB-contaminated oil in field transformers and storage containers, and pure askarel in transformers and capacitors. The most immediate need for a portable field instrument would be for use under PCB spill conditions. Portable monitors based on the principles of photoionization detection (PID) and infrared spectroscopy (IR) have been adapted and evaluated for this purpose. The latter includes both flow cell and horizontal multiple internal reflectance (HMIR) sampling configurations. Extensive work has also been performed on solvent-solvent and solvent-soil extractions, as well as PCB adsorption on packings, for use under spill conditions.

  15. Field-portable pixel super-resolution colour microscope.

    Directory of Open Access Journals (Sweden)

    Alon Greenbaum

    Full Text Available Based on partially-coherent digital in-line holography, we report a field-portable microscope that can render lensfree colour images over a wide field-of-view of e.g., >20 mm(2. This computational holographic microscope weighs less than 145 grams with dimensions smaller than 17×6×5 cm, making it especially suitable for field settings and point-of-care use. In this lensfree imaging design, we merged a colorization algorithm with a source shifting based multi-height pixel super-resolution technique to mitigate 'rainbow' like colour artefacts that are typical in holographic imaging. This image processing scheme is based on transforming the colour components of an RGB image into YUV colour space, which separates colour information from brightness component of an image. The resolution of our super-resolution colour microscope was characterized using a USAF test chart to confirm sub-micron spatial resolution, even for reconstructions that employ multi-height phase recovery to handle dense and connected objects. To further demonstrate the performance of this colour microscope Papanicolaou (Pap smears were also successfully imaged. This field-portable and wide-field computational colour microscope could be useful for tele-medicine applications in resource poor settings.

  16. Portable multispectral imaging system for oral cancer diagnosis

    Science.gov (United States)

    Hsieh, Yao-Fang; Ou-Yang, Mang; Lee, Cheng-Chung

    2013-09-01

    This study presents the portable multispectral imaging system that can acquire the image of specific spectrum in vivo for oral cancer diagnosis. According to the research literature, the autofluorescence of cells and tissue have been widely applied to diagnose oral cancer. The spectral distribution is difference for lesions of epithelial cells and normal cells after excited fluorescence. We have been developed the hyperspectral and multispectral techniques for oral cancer diagnosis in three generations. This research is the third generation. The excited and emission spectrum for the diagnosis are acquired from the research of first generation. The portable system for detection of oral cancer is modified for existing handheld microscope. The UV LED is used to illuminate the surface of oral cavity and excite the cells to produce fluorescent. The image passes through the central channel and filters out unwanted spectrum by the selection of filter, and focused by the focus lens on the image sensor. Therefore, we can achieve the specific wavelength image via fluorescence reaction. The specificity and sensitivity of the system are 85% and 90%, respectively.

  17. Field-portable pixel super-resolution colour microscope.

    Science.gov (United States)

    Greenbaum, Alon; Akbari, Najva; Feizi, Alborz; Luo, Wei; Ozcan, Aydogan

    2013-01-01

    Based on partially-coherent digital in-line holography, we report a field-portable microscope that can render lensfree colour images over a wide field-of-view of e.g., >20 mm(2). This computational holographic microscope weighs less than 145 grams with dimensions smaller than 17×6×5 cm, making it especially suitable for field settings and point-of-care use. In this lensfree imaging design, we merged a colorization algorithm with a source shifting based multi-height pixel super-resolution technique to mitigate 'rainbow' like colour artefacts that are typical in holographic imaging. This image processing scheme is based on transforming the colour components of an RGB image into YUV colour space, which separates colour information from brightness component of an image. The resolution of our super-resolution colour microscope was characterized using a USAF test chart to confirm sub-micron spatial resolution, even for reconstructions that employ multi-height phase recovery to handle dense and connected objects. To further demonstrate the performance of this colour microscope Papanicolaou (Pap) smears were also successfully imaged. This field-portable and wide-field computational colour microscope could be useful for tele-medicine applications in resource poor settings.

  18. Early Experiences Writing Performance Portable OpenMP 4 Codes

    Energy Technology Data Exchange (ETDEWEB)

    Joubert, Wayne [ORNL; Hernandez, Oscar R [ORNL

    2016-01-01

    In this paper, we evaluate the recently available directives in OpenMP 4 to parallelize a computational kernel using both the traditional shared memory approach and the newer accelerator targeting capabilities. In addition, we explore various transformations that attempt to increase application performance portability, and examine the expressiveness and performance implications of using these approaches. For example, we want to understand if the target map directives in OpenMP 4 improve data locality when mapped to a shared memory system, as opposed to the traditional first touch policy approach in traditional OpenMP. To that end, we use recent Cray and Intel compilers to measure the performance variations of a simple application kernel when executed on the OLCF s Titan supercomputer with NVIDIA GPUs and the Beacon system with Intel Xeon Phi accelerators attached. To better understand these trade-offs, we compare our results from traditional OpenMP shared memory implementations to the newer accelerator programming model when it is used to target both the CPU and an attached heterogeneous device. We believe the results and lessons learned as presented in this paper will be useful to the larger user community by providing guidelines that can assist programmers in the development of performance portable code.

  19. Vibration isolation techniques suitable for portable electronic speckle pattern interferometry

    Science.gov (United States)

    Findeis, Dirk M.; Gryzagoridis, Jasson; Rowland, David R.

    2002-06-01

    Electronic Speckle Pattern Interferometry (ESPI) and Digital Shearography are optical interference techniques, suitable for non-destructive inspection procedures. Due to the stringent vibration isolation conditions required for ESPI, the technique is mainly suited for laboratory based inspection procedures, which cannot be said for Digital Shearography. On the other hand, the interference patterns obtained using ESPI exhibit better fringe definition and contrast than those obtained using Digital Shearography. The image quality of Digital Shearography can be improved by introducing phase stepping and unwrapping techniques, but these methods add a level of complexity to the inspection system and reduce the image refresh rate of the overall process. As part of a project to produce a low cost portable ESPI system suitable for industrial applications, this paper investigates various methods of minimizing the impact of environmental vibration on the ESPI technique. This can be achieved by effectively 'freezing' the object movement during the image acquisition process. The methods employed include using a high-powered infra-red laser, which is continuously pulsed using an electronic signal generator as well as a mechanical chopper. The effect of using a variable shutter speed camera in conjunction with custom written software acquisition routines is also studied. The techniques employed are described and are applied to selected samples. The initial results are presented and analyzed. Conclusions are drawn and their impact on the feasibility of a portable ESPI system discussed.

  20. Teknologi Portable Inflated Greenhouse Sebagai Fasilitas Pendukung Peningkatan Ketahanan Pangan Dan Pertanian Perkotaan (Urban Farming

    Directory of Open Access Journals (Sweden)

    Ronny Durrotun Nasihien

    2017-10-01

    Full Text Available Pertanian Perkotaan (Urban Farming memanfaatkan intensifikasi lahan, guna memenuhi kebutuhan sayuran dan buah segar sehari-hari bagi masyarakat pemukiman/perumahan di perkotaan. Teknologi Portable inflated Greenhouse sebagai fasilitas pendukung produksi pertanian perkotaan, dapat dibangun serta dipindahkan ke lokasi pemukiman/perumahan tertentu secara mudah, aman, cepat dan ringan (0,55mm PVC Terpaulin sehingga produk pertanian perkotaan semakin dekat dengan konsumen pemukiman di perkotaan, dampaknya harga semakin murah namun berkualitas. Tujuan jangka panjang adalah mengembangkan protitipe Portable inflated Greenhouse sebagai fasilitas Urban Farming yang memenuhi aspek kekuatan, kecepatan, efektifitas, kenyamanan serta mendorong hasil panen tanaman buah/sayuran hidroponik yang higienis, murah dan menguntungkan, sehingga produk Portable inflated Greenhouse otomatis mendukung peningkatan produksi pangan Nasional. Target khusus adalah tersedianya protitipe Portable inflated Greenhouse sebagai fasilitas Urban Farming guna peningkatan produktifitas tanaman buah/sayuran hidroponik higienis, murah dan menguntungkan, sehingga berprospek tinggi untuk diproduksi massal guna memenuhi kebutuhan pangan Nasional. Metode Penelitian menggunakan Metode Eksperimen dan Action Research, diawali dengan pengembangan rancang bangun, pembuatan, pengujian dan perbaikan prototipe Portable inflated Greenhouse meliputi (1 uji kekuatan dan ketahanan bahan Portable inflated Greenhouse terhadap cuaca, (2 uji bahan Portable inflated Greenhouse yang paling efektif sebagai komponen struktur, (3 uji kecepatan pembuatan, pengangkutan, perakitan, pemasangan, pembongkaran Portable inflated Greenhouse, (4 uji temperatur, kelembaban dan tekanan udara didalam Portable inflated Greenhouse, (5 uji tanaman buah/sayuran hidroponik yang cocok dikembangkan dalam bangunan portable inflated greenhouse sehingga diperoleh hasil panen yang higienis, murah dan menguntungkan. Tahun pertama

  1. Noogenic psychological characteristics and adjustment

    Directory of Open Access Journals (Sweden)

    Robert Masten

    2005-02-01

    Full Text Available The present article is concerned with noogenic personality characteristics of adolescents involved in military training in relation to psychic and psychosomatic symptoms. A selected sample of 107 conscripts was questioned regarding their psychical and psychosomatic symptoms in the first and in the sixth month of their military training. They were also questioned regarding personal meaning of life, as well as regarding their values and attitudes toward the army. Individuals maintaining their personal meaning of life, have less psychical and psychosomatic symptoms after coming to army than the others. The findings do not support the hypothesis that after five months of military training the number of symptoms decreases. In most participants the symptoms mostly remained at the same level after five months of training, for one third of respondents the number of symptoms increased significantly. In 9 % of military recruits number of symptoms decreased. The evaluation of differences in the number of symptoms between two assessments showed, that personal meaning, values and attitudes toward army discriminate the groups with different levels of adjustment to military service. Participants with the same level of symptoms after five months are less hedonistic, have more positive attitudes toward army and higher rates on meaning scales. The data are interpreted in the context of theory that adjustment to stressing life events is mediated by noogenic personality characteristics.

  2. A Lab Assembled Microcontroller-Based Sensor Module for Continuous Oxygen Measurement in Portable Hypoxia Chambers.

    Science.gov (United States)

    Mathupala, Saroj P; Kiousis, Sam; Szerlip, Nicholas J

    2016-01-01

    Hypoxia-based cell culture experiments are routine and essential components of in vitro cancer research. Most laboratories use low-cost portable modular chambers to achieve hypoxic conditions for cell cultures, where the sealed chambers are purged with a gas mixture of preset O2 concentration. Studies are conducted under the assumption that hypoxia remains unaltered throughout the 48 to 72 hour duration of such experiments. Since these chambers lack any sensor or detection system to monitor gas-phase O2, the cell-based data tend to be non-uniform due to the ad hoc nature of the experimental setup. With the availability of low-cost open-source microcontroller-based electronic project kits, it is now possible for researchers to program these with easy-to-use software, link them to sensors, and place them in basic scientific apparatus to monitor and record experimental parameters. We report here the design and construction of a small-footprint kit for continuous measurement and recording of O2 concentration in modular hypoxia chambers. The low-cost assembly (US$135) consists of an Arduino-based microcontroller, data-logging freeware, and a factory pre-calibrated miniature O2 sensor. A small, intuitive software program was written by the authors to control the data input and output. The basic nature of the kit will enable any student in biology with minimal experience in hobby-electronics to assemble the system and edit the program parameters to suit individual experimental conditions. We show the kit's utility and stability of data output via a series of hypoxia experiments. The studies also demonstrated the critical need to monitor and adjust gas-phase O2 concentration during hypoxia-based experiments to prevent experimental errors or failure due to partial loss of hypoxia. Thus, incorporating the sensor-microcontroller module to a portable hypoxia chamber provides a researcher a capability that was previously available only to labs with access to sophisticated (and

  3. A Lab Assembled Microcontroller-Based Sensor Module for Continuous Oxygen Measurement in Portable Hypoxia Chambers.

    Directory of Open Access Journals (Sweden)

    Saroj P Mathupala

    Full Text Available Hypoxia-based cell culture experiments are routine and essential components of in vitro cancer research. Most laboratories use low-cost portable modular chambers to achieve hypoxic conditions for cell cultures, where the sealed chambers are purged with a gas mixture of preset O2 concentration. Studies are conducted under the assumption that hypoxia remains unaltered throughout the 48 to 72 hour duration of such experiments. Since these chambers lack any sensor or detection system to monitor gas-phase O2, the cell-based data tend to be non-uniform due to the ad hoc nature of the experimental setup.With the availability of low-cost open-source microcontroller-based electronic project kits, it is now possible for researchers to program these with easy-to-use software, link them to sensors, and place them in basic scientific apparatus to monitor and record experimental parameters. We report here the design and construction of a small-footprint kit for continuous measurement and recording of O2 concentration in modular hypoxia chambers. The low-cost assembly (US$135 consists of an Arduino-based microcontroller, data-logging freeware, and a factory pre-calibrated miniature O2 sensor. A small, intuitive software program was written by the authors to control the data input and output. The basic nature of the kit will enable any student in biology with minimal experience in hobby-electronics to assemble the system and edit the program parameters to suit individual experimental conditions.We show the kit's utility and stability of data output via a series of hypoxia experiments. The studies also demonstrated the critical need to monitor and adjust gas-phase O2 concentration during hypoxia-based experiments to prevent experimental errors or failure due to partial loss of hypoxia. Thus, incorporating the sensor-microcontroller module to a portable hypoxia chamber provides a researcher a capability that was previously available only to labs with access to

  4. Organizational Security Threats Related to Portable Data Storage Devices: Qualitative Exploratory Inquiry

    Science.gov (United States)

    Cooper, Paul K.

    2017-01-01

    There has been a significant growth of portable devices capable of storing both personal data as well as sensitive organizational data. This growth of these portable devices has led to an increased threat of cyber-criminal activity. The purpose of this study was to gain a better understanding of security threats to the data assets of organizations…

  5. Portable and wireless IV-curve tracer for >5 kV organic photovoltaic modules

    DEFF Research Database (Denmark)

    Garcia Valverde, Rafael; Chaouki-Almagro, Samir; Corazza, Michael

    2016-01-01

    The practical design of a wirelessly controlled portable IV-curve tracer based on a capacitive load is described. The design is optimized for the measurement of solar cell modules presenting a high open circuit voltage of up to 6 kV and a low short circuit current below 100 mA. The portable IV-tr...

  6. Training on a new, portable, simple simulator transfers to performance of complex bronchoscopy procedures

    DEFF Research Database (Denmark)

    Loumann Krogh, Charlotte; Konge, Lars; Bjurström, Johanna Margareta

    2013-01-01

    Virtual-reality (VR) simulation provides a safe and effective learning environment prior to practicing on patients. However, existing bronchoscopy simulators are expensive and not easily portable.......Virtual-reality (VR) simulation provides a safe and effective learning environment prior to practicing on patients. However, existing bronchoscopy simulators are expensive and not easily portable....

  7. 77 FR 1083 - Certain Portable Electronic Devices and Related Software; Determination Not To Review Initial...

    Science.gov (United States)

    2012-01-09

    ... COMMISSION Certain Portable Electronic Devices and Related Software; Determination Not To Review Initial... importation, and sale within the United States after importation of certain portable electronic devices and...'s electronic docket (EDIS) at http://edis.usitc.gov . Hearing-impaired persons are advised that...

  8. 76 FR 24051 - In the Matter of Certain Electronic Devices, Including Mobile Phones, Mobile Tablets, Portable...

    Science.gov (United States)

    2011-04-29

    ... COMMISSION In the Matter of Certain Electronic Devices, Including Mobile Phones, Mobile Tablets, Portable... within the United States after importation of certain electronic devices, including mobile phones, mobile... importation of certain electronic devices, including mobile phones, mobile tablets, portable music players...

  9. Conversion of DST Group Shape Optimisation Software for Increased Portability across Computing Platforms

    Science.gov (United States)

    2016-05-01

    UNCLASSIFIED UNCLASSIFIED Conversion of DST Group Shape Optimisation Software for Increased Portability across Computing Platforms Robert Kaye...and Witold Waldman Aerospace Division Defence Science and Technology Group DST-Group-TR-3251 ABSTRACT The DST Group shape optimisation ...2016 APPROVED FOR PUBLIC RELEASE UNCLASSIFIED UNCLASSIFIED Conversion of DST Group Shape Optimisation Software for Increased Portability

  10. How portable is social security for migrant workers? : A review of the literature

    NARCIS (Netherlands)

    N. Taha (Nurulsyahirah); M. Messkoub (Mahmood); K.A. Siegmann (Karin Astrid)

    2013-01-01

    textabstractThis paper reviews the literature on the portability of social security entitlements for migrant workers, who moved along North-North, South- North, and South-South migration flows. Portability of social security entitlements is the ability of migrant workers to preserve, maintain, and

  11. 77 FR 38826 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...

    Science.gov (United States)

    2012-06-29

    ... COMMISSION Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and... importation, and the sale within the United States after importation of certain wireless communication devices, portable music and data processing devices, computers and components thereof by reason of infringement of...

  12. 77 FR 52759 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...

    Science.gov (United States)

    2012-08-30

    ... COMMISSION Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and... importation of certain wireless communication devices, portable music and data processing devices, computers... to a data communications system.'' The Commission has determined to affirm the ID's finding that...

  13. 78 FR 24775 - Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and...

    Science.gov (United States)

    2013-04-26

    ... COMMISSION Certain Wireless Communication Devices, Portable Music and Data Processing Devices, Computers and... United States after importation of certain wireless communication devices, portable music and data processing devices, computers and components thereof by reason of ] infringement of certain claims of U.S...

  14. Portable exhausters POR-004 SKID B, POR-005 SKID C, POR-006 SKID D storage plan

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, O.D.

    1997-09-04

    This document provides a storage plan for portable exhausters POR-004 SKID B, POR-005 SKID C, AND POR-006 SKID D. The exhausters will be stored until they are needed by the TWRS (Tank Waste Remediation Systems) Saltwell Pumping Program. The storage plan provides criteria for portable exhauster storage, periodic inspections during storage, and retrieval from storage.

  15. The portability of computer-related educational resources : an overview of issues and directions

    NARCIS (Netherlands)

    de Diana, I.P.F.; Collis, Betty

    1990-01-01

    The portability of educational software is defined as the feasibility of software usage, with or without adaptation, in an educational environment different from that for which the software was originally designed and produced Portability is a desirable characteristic of educational software from

  16. 75 FR 7342 - Airworthiness Directives; SICLI Halon 1211 Portable Fire Extinguishers as Installed on Various...

    Science.gov (United States)

    2010-02-19

    ... Portable Fire Extinguishers as Installed on Various Airplanes and Rotorcraft AGENCY: Federal Aviation... subsequently been used to fill P/N 1708337B4 portable fire extinguishers that are now likely to be installed in..., ] extinguisher activation may lead to release of toxic fumes, possibly causing injury to aircraft occupants...

  17. 46 CFR 167.45-70 - Portable fire extinguishers, general requirements.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Portable fire extinguishers, general requirements. 167... Portable fire extinguishers, general requirements. (a) Extra charges shall be carried on board for 50 percent of each size and variety of fire extinguishers provided. If 50 percent of each size and variety of...

  18. 75 FR 48728 - The Hydrostatic Testing Provision of the Portable Fire Extinguishers Standard; Extension of the...

    Science.gov (United States)

    2010-08-11

    ... Extinguishers Standard; Extension of the Office of Management and Budget's (OMB) Approval of the Information... the Hydrostatic Testing provision of the Portable Fire Extinguishers Standard for General Industry (29... the Portable Fire Extinguishers Standard are necessary to reduce workers' risk of death or serious...

  19. 76 FR 19914 - Safety Standard for Portable Bed Rails: Notice of Proposed Rulemaking

    Science.gov (United States)

    2011-04-11

    ..., we believe that the products meet the definition of a portable bed rail and should be included in the... evaluating entrapment hazards. D. Incident Data 1. Incident Reports The CPSC Directorate for Epidemiology... inflatable rubber materials and meet the definition of a portable bed rail under ASTM F 2085-10a. However...

  20. 46 CFR 122.614 - Portable watertight containers for distress flares and smoke signals.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Portable watertight containers for distress flares and smoke signals. 122.614 Section 122.614 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... flares and smoke signals. Portable watertight containers for distress flares and smoke signals shall be...