gebhart/patrepeval huggingface dataset:
Computing location from ambient FM radio signals (2005)

We present a method for computing the location of a device down to a radius of several miles within a greater metropolitan area by analyzing the signal strengths observed from commercial FM radio stations. The use of ambient commercial radio signals allows for wide coverage, both indoor and outdoor reception, client-side computing for privacy, and the feasibility of employing inexpensive, low-power measurement hardware. Our technique is based on a model for computing the likelihood of locations using both received signal strengths and information from a simulated signal strength map. Using simulated signal strengths relieves the burden of manually measuring signal strength as a function of location. We account for the inevitable measurement variations among devices by comparing rankings of radio stations by signal strength. Our experiments show we can measure location down to a median error of about 8 kilometers (5 miles) in the greater Seattle area by listening to seven different radio stations.
NUMERICAL AND EXPERIMENTAL TIME-REVERSAL OF ACOUSTIC WAVES IN RANDOM MEDIA (2001)

In classical mechanics, a time-reversal experiment with a large number of particles is impossible. Because of the high sensitivity to initial conditions, one would need to resolve the positions and velocities of each particle with infinite accuracy. Thus, it would require an infinite amount of information, which is of course out of reach. In wave physics however, the amount of information required to describe a wave field is limited and depends on the shortest wavelength of the field. Thus we can propose an acoustic equivalent of the experiment we mentioned above. We start with a coherent transient pulse, let it propagate through a disordered highly scattering medium, then record the scattered field and time-reverse it: surprisingly, it travels back to its initial source, which is not predictable by usual theories for random media. Indeed, to study waves propagation in disordered media theoreticians, who find it difficult to deal with one realization of disorder, use concepts defined as an average over the realizations, which naturally leads to the diffusion approximation. But the corresponding equation is not time-reversal invariant and thus fails in describing our experiment. Then, to understand our experimental results and try to predict new ones, we have developed a finite elements simulation based on the real microscopic time-invariant equation of propagation. The experimental and numerical results are found to be in very good agreement.
Box queries over multi-dimensional streams (2021)

Answering statistical queries about streams of online arriving data is becoming increasingly important. Often, such data includes multiple-attributes, so data elements can be viewed as points in a multi-dimensional universe. This paper extends existing works on streaming algorithms by studying the ability to perform box queries on online multi-dimensional data streams. We develop three algorithms C-DARQ, DARQ and MARQ that support such capabilities for a large number of statistical functions including (but not limited to) counting, frequency estimation, heavy-hitters etc. The protocols are analyzed and evaluated over synthetic and datasets from Kaggle in multiple dimensions (up to 8). Our algorithms asymptotically improve the space bounds as well as update and query performance of existing works. Unlike known approaches, our algorithms can also be used to solve a larger class of problems beyond counting. We further discuss extending our work to the sliding window model and when the dimensions' bounds are a-priori unknown.
Towards scalable clinical immersion experiences for engineering students (2024)

is a doctoral candidate at the University of at Austin pursuing a degree in Biomedical Engineering with a certificate in engineering education. His research focus is on the use of liposomes for targeted drug delivery and release. He received a BS in Chemical and Biological Engineering from Colorado School of Mines. Brandon is also conducting research on the modes of resistance LGBTQIA+
Causal effect of alcohol use on the risk of end-stage kidney disease and related comorbidities: a Mendelian randomization study (2021)

The inverse observational association between alcohol use and the risk of CKD or ESKD may have been affected by reverse causation. Our study supports a causal effect of alcohol use on a higher risk of ESKD and related predisposing comorbidities.
Deghosting based on in-loop selective filtering using motion vector information for low-bit-rate-video coding (2009)

In this paper, a technique is presented to alleviate ghosting artifacts in the decoded video sequences for low-bit-rate video coding. Ghosting artifacts can be defined as the appearance of ghost like outlines of an object in a decoded video frame. Ghosting artifacts result from the use of a prediction loop in the video codec, which is typically used to increase the coding efficiency of the video sequence. They appear in the presence of significant frame-to-frame motion in the video sequence, and are typically visible for several frames until they eventually die out or an intra-frame refresh occurs. Ghosting artifacts are particularly annoying at low bit rates since the extreme loss of information tends to accentuate their appearance. To mitigate this effect, a procedure with selective in-loop filtering based on motion vector information is proposed. In the proposed scheme, the in-loop filter is applied only to the regions where there is motion. This is done so as not to affect the regions that are devoid of motion, since ghosting artifacts only occur in high-motion regions. It is shown that the proposed selective filtering method dramatically reduces ghosting artifacts in a wide variety of video sequences with pronounced frame-to-frame motion, without degrading the motionless regions.
Estimating pedicle screw fastening strength via a virtual templating platform for spine surgery planning: a retrospective preliminary clinical demonstration (2014)

Traditional 2D images provide limited use for accurate planning of spine interventions, due to their inability to display the complex 3D spine anatomy and proximity of nerve bundles and vascular structures that must be avoided during the procedure. We have developed a platform for spine surgery planning that employs standard of care 3D preoperative images and enables oblique reformatting and 3D rendering of individual or multiple vertebrae, interactive templating and placement of virtual pedicle implants into the patient-specific computed tomography data. Here we propose a combined surrogate metric – the fastening strength – to provide estimates of the optimal implant selection and trajectory based on implant dimension and bone mineral density (BMD) of the displaced bone substrate. We conducted a retrospective clinical study based on pre- and post-operative data from four patients who underwent procedures involving pedicle screw implantation. We assessed the retrospective plans against the post-operative imaging data according to implant dimension, mean voxel intensity of implant trajectory, and fastening strength and showed consistency between the proposed plans and the post-operative procedure outcome. Our preliminary studies have demonstrated the feasibility of the platform in assisting the surgeon with the selection of appropriate size implant and trajectory that optimises fastening strength, given the intrinsic vertebral geometry and BMD.
Mastering Lotus Notes R5 (1999)

From the Publisher:
With R5, Lotus establishes a seamless, easy-to-navigate environment in which internet and internal resources are equally accessible. Mastering Lotus Notes R5 enables you to master all the information and services provided by this popular groupware product. R5 also offers friendlier development tools for building custom Notes applications. This book begins with Notes basics and then moves on to brand-new techniques you can use to give your applications increased power and flexibility.. The enclosed CD provides several example databases you can experiment with as you master all the client application's features.
CAD-based object tracking with distributed monocular camera for security monitoring (2002)

Describes a method for tracking moving objects using several monocular cameras which are mounted in various locations in a building. The authors propose a distributed vision agent model in which each agent has a monocular camera, an image processor and a communication link to other agents. Although the eye of each agent is monocular, it can estimate the location of unknown moving objects by using a CAD solid model of the building. The communication among agents enables the whole system harmoniously to track multiple objects. One application of the system is building security. For that purpose, the system has the ability to recognize and track a deformable object, that is, a walking person. The experimental results showed that the proposed distributed vision agent model can realize an accurate and wide area of object tracking for building security purposes. The merging of image data obtained by inexpensive distributed monocular cameras with a solid model of a building can provide useful 3D information, thus making an expensive active 3D sensing or stereo vision system unnecessary.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Buffered or unbuffered: a case study based on log/sub d/(N,e,p) networks (1996)

Two implementation styles (buffered and unbuffered) have been used for constructing multistage interconnection networks for ATM switching. Conventional studies have shown that an unbuffered network, while having a simpler design, produces a lower throughput than a buffered network. But most of these studies, based on the assumption that each cell is routed independently (i.e. per-cell routing), ignored the out-of-sequence transmission problem of a buffered network in a virtual-channel environment. One way to keep the packet sequence for a buffered network without adding additional hardware is to fix the path for each virtual channel. We compute the throughput of this approach in designing nonblocking networks and compare it with that of the unbuffered approach. The base of our comparison is log/sub d/(N,e,p) networks. The results show that a fixed-path-routing buffered network will have a throughput even lower than that of an unbuffered network.
Comment on “Synthesis, characterization and growth mechanism of flower-like vanadium carbide hierarchical nanocrystals” (2012)

This Letter is in response to a recent paper by Ma et al. (CrystEngComm, 2010, 12, 750–754) which arguably studied vanadium carbide nanostructures whereas all available evidence indicates the study of vanadium oxide. We feel that it is important to communicate to the community several inconsistencies so that the interesting material reported can be seen in the right light, especially with several groups nowadays having reported similar structures from vanadium oxide synthesis.
Fan Flow Deflection for Supersonic Turbofan Engines (2008)

We present an initial parametric investigation of fan flow deflectors for suppressing noise from supersonic turbofan engines. Realistic exhaust geometry and flow conditions for bypass ratio 2.7 were simulated in a subscale experiment. The study encompassed acoustic measurement and mean velocity surveys. The deflectors comprised internal vanes with both symmetric and cambered airfoil sections and deployable external flaps. Superior acoustic results were achieved using a combination of cambered vanes and perforated flaps, yielding cumulative (downward plus sideline) EPNL and OASPL reductions of 7.7 dB and 9.2 dB respectively. A fair correlation is established between the suppression of peak OASPL and the reduction of the radial velocity gradient on the underside of the jet.
PCO2 affects tracheal tone during apnea in anesthetized dogs (1996)

We hypothesized that CO2, like hypoxia and withdrawal of pulmonary slowly adapting receptor input, would cause tracheal constriction during neural apnea (absence of phrenic activity). In seven anesthetized paralyzed dogs ventilated to neural apnea, we increased arterial PCO2 (PaCO2) in steps by adding CO2 to the inspirate while keeping ventilation constant. Increases in PaCO2 caused tracheal constriction during neural apnea in all dogs; 69 +/- 26 (SD)% of the change in tracheal diameter occurred during neural apnea. Average sensitivity of tracheal diameter to CO2 was 0.44 mm/Torr PaCO2. Our data suggest that central chemoreceptor inputs to brain stem neurons controlling smooth muscle of the extrathoracic airway bypass central mechanisms generating inspiration.
PS1-16: The Role of Health Information Technology Regional Extension Centers in Health Care Transformation (2011)

Background/Aims: The Medication Possession Ratio (MPR) is a common claims-based metric for describing medication adherence. The MPR can only be calculated for patients who fill at least 2 prescriptions. Thus, patients with <2 prescription fills are excluded from the MPR denominator in populationlevel adherence reports. Combining prescription-ordering data available in an electronic health record (EHR) with matching claims data, we characterized the population excluded from a MPR-based adherence calculation. Methods: We conducted a retrospective (2004)(2005)(2006)(2007)(2008) analysis of EHR and claims data for patients treated in the Geisinger Clinic. Hypertensive patients continuously enrolled for at least two years in the Geisinger Health Plan (GHP) with GHP pharmacy benefit coverage were identified using blood pressure (BP) data in the EHR and ICD-9 codes associated with clinic encounters. For all patients with an EHR order for an angiotensin converting enzyme inhibitor (ACEI) or an angiotensin receptor blocker (ARB), we matched each EHR order with the corresponding claim if one existed. Results: We identified 89,403 patients with hypertension, of whom 14,387 (16.1%) had at least 2 years of continuous pharmacy benefits. Median age was 67 years and 51% of the cohort was female. There were 4,934 patients with = 1 order for an ACEI and 1,251 patients had = 1 order for an ARB. The MPR could not be calculated for 18.8% (n=928) of patients based on ACEI orders and for 32.3% (n=404) of patients based on ARB orders. Patients for whom the MPR could not be calculated had a higher systolic BP than patients with an MPR measure (137 compared to 134 for patients with an ACEI; 139 compared to 134 for ARBs), and a higher diastolic BP (77.91 compared to 76.92 for ACEI; 76.16 compared to 75.33 for ARBs). Conclusion: In this primary care population, a sizable proportion of patients failed to fill more than one antihypertensive prescription. These patients are likely to be excluded from population level adherence estimates. Further analyses will examine differences between the "MPR" cohort and those patients excluded from the calculation.
The GBAR source model for VBR videoconferences (1997)

Heyman (1992) examined three sequences giving the number of cells per frame of a VBR encoding of videoconferences (talking heads); these sequences were produced by hardware encoders using different coding algorithms. Each sequence had a gamma marginal distribution, and the autocorrelation function was geometric up to lags of at least 3 s, which includes all autocorrelation values larger than 0.1. We present an easy to simulate autoregressive process that has these properties. The model is tested by comparing the cell-loss rate produced when the data trace was used as the sole source in a simulation of an ATM switch to the cell-loss rates produced when traces generated by the model were used as the source.
DNA Biochip Using a Phototransistor Integrated Circuit (1998)

This work describes the development of an integrated biosensor based on phototransistor integrated circuits (IC) for use in medical detection, DNA diagnostics, and gene mapping. The evaluation of various system components developed for an integrated biosensor microchip is discussed. Methods to develop a microarray of DNA probes on nitrocellulose substrate are discussed. The biochip device has sensors, amplifiers, discriminators, and logic circuitry on board. Integration of light-emitting diodes into the device is also possible. To achieve improved sensitivity, we have designed an IC system having each phototransistor sensing element composed of 220 phototransistor cells connected in parallel. Measurements of fluorescent-labeled DNA probe microarrays and hybridization experiments with a sequence-specific DNA probe for the human immunodeficiency virus 1 system on nitrocellulose substrates illustrate the usefulness and potential of the DNA biochip.
Two-dimensional angular filter array for angular domain imaging with 3D printed angular filters (2013)

Angular Domain Imaging (ADI) is a technique that is capable of generating two dimensional shadowgrams of attenuating targets embedded in a scattering medium. In ADI, an angular filter array (AFA) is positioned between the sample and the detector to distinguish between quasi-ballistic photons and scattered photons. An AFA is a series of micro-channels with a high aspect ratio. Previous AFAs from our group were constructed by micro-machining the micro-channels into a silicon wafer, limiting the imaging area to a one dimensional line. Two dimensional images were acquired via scanning. The objective of this work was to extend the AFA design to two dimensions to allow for two dimensional imaging with minimal scanning. The second objective of this work was to perform an initial characterization of the imaging capabilities of the 2D AFA. Our approach was to use rapid 3D prototyping techniques to generate an array of micro-channels. The imaging capabilities were then evaluated by imaging a 0.9 mm graphite rod submerged in a scattering media. Contrast was observed to improve when a second angular filter array was placed in front of the sample to mask the incoming light.
Unified Analytic Calculation Method for Zoom Loci of Zoom Lens Systems with a Finite Object Distance (2014)

The number of lens groups in modern zoom camera systems is increased above that of conventional systems in order to improve the speed of the auto focus with the high quality image. As a result, it is difficult to calculate zoom loci using the conventional analytic method, and even the recent one-step advanced numerical calculation method is not optimal because of the time-consuming problem generated by the iteration method. In this paper, in order to solve this problem, we suggest a new unified analytic method for zoom lens loci with finite object distance including infinite object distance. This method is induced by systematically analyzing various distances between the object and other groups including the first lens group, for various situations corresponding to zooming equations of the finite lens systems after using a spline interpolation for each lens group. And we confirm the justification of the new method by using various zoom lens examples. By using this method, we can easily and quickly obtain the zoom lens loci not only without any calculation process of iteration but also without any limit on the group number and the object distance in every zoom lens system.
Dual-Sided Adsorption: Devil’s Staircase of Coverage Fractions (2018)

By adsorbing the same species onto both sides of a suspended, atomically thin membrane, it is possible to couple two distinct surface adsorption systems. This new system, with reflection symmetry about the membrane, is described by a phase diagram with two axes, both representing the chemical potential of the same element, but in distinct half-spaces. For the case of potassium adsorption onto a graphene membrane, the result is a devil's staircase of fractions for the proportion of adsorbates adhered to one side. Fractions with simpler denominators are favored across wider regions of chemical potential, a pattern reminiscent of other fractional systems across a wide range of physics. Since the system can support multiple devil's staircases each at a distinct overall adsorbate areal density, points along the boundary between adjacent staircases can come arbitrarily close to violating the Gibbs phase rule. This dual-sided adsorbate geometry provides a means to explore surface science for pairs of weakly coupled surfaces.
Physico-chemical investigations of high iron bauxite for application of refractive and ceramics (2017)

The present paper outlines the physico-chemical and mineralogical characteristics of high iron bearing bauxite sample for the applications of refractive and ceramics. Bauxite is widely used for refractory, ceramic and abrasives production due to its distinctive properties like high stability, high melting point, and high alumina content. Bauxite used in the present investigation has been collected from the various places of Damanjodi deposits, Odisha, India. The studied ore has been systematically characterized with the help of wet chemical analysis, thermal (differential thermal analysis), mineralogical phases (X-ray diffraction), microscopic (optical microscopy) and FTIR analysis. In addition to this, attempts have also been made to study the reduction of bauxite, which depends upon it's the chemical composition. The obtained results showed that the bauxite ore has been mineralogically associated with gibbsite, ferruginous mineral phases like hematite along with silica, and titania. The results also reveal that the iron content in the processed bauxite has been decreased below 2% and can be used as suitable raw material for refractory and ceramics applications.
760 PB 184 INDOLE-3-ACETIC ACID REGULATES APICAL DOMINANCE BY CONTROLLING THE STATE OF WATER AND MEMBRANE LIPID COMPOSITION IN BUDS OF MALUS DOMESTICA BORKH (1994)

The effect of Indole-3-acetic acid (IAA) on apical dominance in apple (Malus domestica Borkh.) buds was examined by studying changes In proton density (free water) and membrane lipid composition in lateral buds. Decapitation induced budbreak and enhanced lateral bud growth. IAA replaced apical control of lateral bud paradormancy. Maximal inhibition was obtained when IAA was applied immediately after the apical bud was removed. Delaying this application weakens the effect of IAA. An increase in proton density in lateral buds was observable 2 days after decapitation, whereas the change in membrane lipid composition occurred 4 days later. Decapitating the terminal bud induced an increase in membrane galacto- and phospholipids. and the ratio of unsaturated to corresponding saturated fatty acids. Decapitation also induced a decrease in the ratio of free sterols to phospholipids in lateral buds. Application of IAA to the terminal end of decapitated shoots inhibited the increase of proton density and prevented changes in the membrane lipid composition of lateral buds.
Long-term follow-up and bronchial reactivity testing in survivors of the adult respiratory distress syndrome. (1978)

Long-term follow-up of 9 survivors of the adult respiratory distress syndrome at 39 to 83 months demonstrated 2 patients with continued improvement of their restrictive pattern, 3 patients with stable mild obstructive disease, one patient who had had chronic obstructive pulmonary disease before the adult respiratory distress syndrome with continued pulmonary deterioration, and 4 patients without symptoms and with normal pulmonary function tests. Attention is drawn to bronchial reactivity as defined by a bronchodilator response of more than 60 per cent increase in maximal mid-expiratory flow, positive methacholine challenge, or development of bronchospasm after exercise in 3 patients having clinical symptoms of wheezing on recovery.