gebhart/patrepeval huggingface dataset:
A rare case of an isolated traumatic cuboid dislocation treated with a novel technique (2023)

Complete cuboid dislocation without cuboid fracture are rare injuries and there is a paucity of literature describing their management. Previous studies have reported on the use of closed reduction casting, internal fixation, and Kirschner wire fixation in the treatment of such injuries. This case report presents the successful management of a complete cuboid dislocation in a healthy 42-year-old man following a motorcycle accident. The dislocation was reduced and stabilized using a novel mini-open approach that involved distraction of the lateral column complex through the use of an external fixator, followed by percutaneous Kirschner wire fixation to reinforce the area. The patient was monitored for 46 months and continues to function without limitation. This case report highlights the successful application of a novel fixation construct using an external fixator device and percutaneous Kirschner wire fixation for the treatment of a complete cuboid dislocation without cuboid fracture. The technique presented in this report could offer a valuable additional option for physicians treating patients with these rare injuries.
Highly Attenuated Bordetella pertussis Strain BPZE1 as a Potential Live Vehicle for Delivery of Heterologous Vaccine Candidates (2007)

Bordetella pertussis, the causative agent of whooping cough, is a promising and attractive candidate for vaccine delivery via the nasal route, provided that suitable attenuation of this pathogen has been obtained. Recently, the highly attenuated B. pertussis BPZE1 strain has been described as a potential live pertussis vaccine for humans. We investigated here the use of BPZE1 as a live vehicle for heterologous vaccine candidates. Previous studies have reported the filamentous hemagglutinin (FHA), a major B. pertussis adhesin, as a carrier to express foreign antigens in B. pertussis. In this study, we also examined the BrkA autotransporter as a surface display system. Three copies of the neutralizing peptide SP70 from enterovirus 71 (EV71) were fused to FHA or in the passenger domain of BrkA, and each chimera was expressed in BPZE1. The FHA-(SP70)3 and BrkA-(SP70)3 chimeras were successfully secreted and exposed at the bacterial surface, respectively. Nasal administration of the live recombinant strains triggered a strong and sustained systemic anti-SP70 antibody response in mice, although the titers and neutralizing activities against EV71 were significantly higher in the sera of mice immunized with the BrkA-(SP70)3-producing strain. These data indicate that the highly attenuated BPZE1 strain is a potential candidate for vaccine delivery via the nasal route with the BrkA autotransporter as an alternative to FHA for the presentation of the heterologous vaccine antigens.
Multisignatures based on zero knowledge schemes (1991)

It is shown that signatures formed from zero knowledge identification schemes can be extended to form schemes for multisignatures. These have considerable advantages over previously suggested multisignature schemes, particularly in terms of efficiency.
The Design and Use of a Generic Context Server (1998)

Although context awareness is a key component for perceptual user interfaces, we lack generic infrastructure for developing context aware applications. We propose a generic infrastructure based on context servers that store, share and archive contextual data. We describe a few applications we have built that take advantage of context sharing and context history. We then turn to the overall design of our context server and analyze in detail its services with a worked example. 1. Introduction Context awareness is recognized as an important feature for ubiquitous and wearable computing. Context sensing and interpretation techniques are maturing and applications demonstrate the value of using context. However, bridging the gap between sensing and interpretation techniques on one hand and applications on the other hand is mostly done using ad hoc techniques. The lack of generic infrastructure requires developers to rely on custom solutions for handling context and hinders the development...
A Histologic and Biochemical Comparison of the Interface Tissues in Cementless and Cemented Hip Prostheses (1993)

Thirty-four membranes from 20 cementless and 14 cemented prostheses from 33 patients excised during revision arthroplasty were analyzed for foreign-body reactive processes. As a control, identical analyses were performed using adjacent pseudocapsular tissue taken from 12 patients during revision arthroplasty. Histologically, cementless membranes tended to contain more metal debris, and cemented membranes contained more foreign-body giant cells. Collagenase, gelatinase, prostaglandin E2, and interleukin-1 were measured in conditioned media taken from organ cultures of each interface membrane. Both cementless and cemented membranes released significant levels of gelatinase and collagenase, prostaglandin E2, and interleukin-1 into the conditioned media when compared with control tissues. However, the tissue concentrations were not significantly different between cementless and cemented membranes. Although histologic differences between cementless and cemented interface membranes exist, both share a similar capacity to release bioactive products that can induce bone resorption and cause aseptic loosening of the hip prostheses.
Fault tolerant onboard packet switch architecture for communication satellites - Shared memory per beam approach (1994)

The NASA Lewis Research Center is developing a multichannel communication signal processing satellite (MCSPS) system which will provide low data rate, direct to user, commercial communications services. The focus of current space segment developments is a flexible, high-throughput, fault tolerant onboard information switching processor. This information switching processor (ISP) is a destination-directed packet switch which performs both space and time switching to route user information among numerous user ground terminals. Through both industry study contracts and in-house investigations, several packet switching architectures were examined. A contention-free approach, the shared memory per beam architecture, was selected for implementation. The shared memory per beam architecture, fault tolerance insertion, implementation, and demonstration plans are described.
Guiado de la energía eléctrica: La conmutación rápida de la energía eléctrica mantiene en funcionamiento las cadenas de montaje (2003)

The glucokinase regulatory protein (GKRP) is a competitive inhibitor of glucokinase (GCK), triggering its localization to the hepatocyte nucleus upon glucose deprivation. Here we establish the kinetic mechanism of GKRP action by analyzing its association with a genetically encoded, fluorescent variant of human GCK. Our results demonstrate that binding of GKRP to GCK involves two steps, formation of an initial encounter complex followed by conformational equilibration between two GKRP-GCK states. Fructose 6-phosphate, a known enhancer of GKRP action, promotes formation of the initial encounter complex via a 2.6-fold increase in kon and stabilizes the complex through a 60-fold decrease in koff.
Supraglottic and Pharyngeal Sensory Abnormalities in Stroke Patients with Dysphagia (1996)

Dysphagia and aspiration are two devastating sequelae of stroke, accounting for nearly 40,000 deaths from aspiration pneumonia each year in the United States. While motor deficits in the larynx and pharynx are thought responsible for dysphagia and aspiration in stroke patients, no prior study has evaluated whether these patients also have sensory deficits. The aim of this study was to evaluate the sensory capacity of the laryngopharynx (LP) in supratentorial or brain stem stroke patients who presented with dysphagia. Fifteen stroke patients (mean age, 66.7 +/- 13.8 [SD] years) were prospectively evaluated by means of our previously described method whereby air pulse stimuli were delivered via a flexible fiberoptic telescope to the mucosa innervated by the superior laryngeal nerve. There were 15 age-matched controls. No LP sensory deficits were found in any of the age-matched controls. In all stroke patients studied, either unilateral (n = 9) or bilateral (n = 6) sensory deficits were identified. Deficits were defined as either a moderate impairment in sensory discrimination thresholds (3.5 to 6.0 mm Hg) or a severe sensory impairment (> 6.0 mm Hg). These sensory discrimination thresholds were significantly greater than in age-matched controls (7.05 +/- 0.17 mm Hg for the supratentorial group and 6.05 +/- 1.22 mm Hg for the infratentorial group versus 2.61 +/- 0.69 mm Hg for the controls). Among patients with unilateral deficits, sensory thresholds were moderately to severely elevated in all 9 cases on the affected side compared with the unaffected side (p < .01, Fisher's exact test). Moreover, the sensory thresholds of the unaffected side were not significantly different from those of age-matched controls (2.51 +/- 0.25 mm Hg versus 2.61 +/- 0.69 mm Hg, respectively). All 6 patients with bilateral deficits had severe impairments. The results of an outcome assessment in 13 of 15 patients revealed that 2 out of 5 patients with moderate LP sensory impairment and 5 out of 8 with severe impairment developed aspiration. Our results show for the first time that stroke patients with dysphagia have significant sensory deficits in the LP and that these impairments are likely to contribute to the development of aspiration.
Comparative Metabolomics of Early Development of the Parasitic Plants Phelipanche aegyptiaca and Triphysaria versicolor (2019)

Parasitic weeds of the family Orobanchaceae attach to the roots of host plants via haustoria capable of drawing nutrients from host vascular tissue. The connection of the haustorium to the host marks a shift in parasite metabolism from autotrophy to at least partial heterotrophy, depending on the level of parasite dependence. Species within the family Orobanchaceae span the spectrum of host nutrient dependency, yet the diversity of parasitic plant metabolism remains poorly understood, particularly during the key metabolic shift surrounding haustorial attachment. Comparative profiling of major metabolites in the obligate holoparasite <i>Phelipanche aegyptiaca</i> and the facultative hemiparasite <i>Triphysaria versicolor</i> before and after attachment to the hosts revealed several metabolic shifts implicating remodeling of energy and amino acid metabolism. After attachment, both parasites showed metabolite profiles that were different from their respective hosts. In <i>P. aegyptiaca</i>, prominent changes in metabolite profiles were also associated with transitioning between different tissue types before and after attachment, with aspartate levels increasing significantly after the attachment. Based on the results from <sup>15</sup>N labeling experiments, asparagine and/or aspartate-rich proteins were enriched in host-derived nitrogen in <i>T. versicolor</i>. These results point to the importance of aspartate and/or asparagine in the early stages of attachment in these plant parasites and provide a rationale for targeting aspartate-family amino acid biosynthesis for disrupting the growth of parasitic weeds.
Reconfiguring Wireless Environment via Intelligent Surfaces for 6G: Reflection, Modulation, and Security (2022)

Reconfigurable intelligent surface (RIS) has been recognized as an essential enabling technique for the sixth-generation (6G) mobile communication network. Specifically, an RIS is comprised of a large number of small and low-cost reflecting elements whose parameters are dynamically adjustable with a programmable controller. Each of these elements can effectively reflect a phase-shifted version of the incident electromagnetic wave. By adjusting the wave phases in real time, the propagation environment of the reflected signals can be dynamically reconfigured to enhance communication reliability, boost transmission rate, expand cellular coverage, and strengthen communication security. In this paper, we provide an overview on RIS-assisted wireless communications. Specifically, we elaborate on the state-of-the-art enabling techniques of RISs as well as their corresponding substantial benefits from the perspectives of RIS reflection and RIS modulation. With these benefits, we envision the integration of RIS into emerging applications for 6G. In addition, communication security is of unprecedented importance in the 6G network with ubiquitous wireless services in multifarious verticals and areas. We highlight potential contributions of RIS to physical-layer security in terms of secrecy rate and secrecy outage probability, exemplified by a typical case study from both theoretical and numerical aspects. Finally, we discuss challenges and opportunities on the deployment of RISs in practice to motivate future research.
Engineering Criticality Assessments of Floating Offshore Platforms Based on Time Domain Structural Response Analysis (2021)

Abstract This paper presents a time-domain S-N fatigue analysis and an approach to reliable and robust engineering criticality assessments to supplement or provide an alternative to S-N fatigue assessments of offshore platform structures based on time domain structural response analysis. It also provides recommendations for industry standards to improve guidance for structural integrity assessments of offshore platforms using fracture mechanics. Demand continues to grow in the offshore industry to attain value from captured operational data for a number of purposes, including the reduction of uncertainties in structural integrity assessments during design and over the operational lifetime of floating offshore platforms. Recent advances in time domain structural analysis technology demonstrate substantially more accurate assessments of non-linear platform loadings and responses with enhanced computational efficiency. The current S-N approach for fatigue design and integrity assessments calculates a fatigue damage factor that does not address how loading occurs over time (ABS, DNVGL-RP-C203). For the present study, engineering criticality assessments (ECAs) based on fracture mechanics theory (BS 7910) are applied utilizing time-domain loading information theory. The ECA returns the smallest initial flaws that can grow to a critical size during a design lifetime, which can serve as an indicator of acceptability during design, a technical basis for in-service inspection intervals and facilitates asset integrity and life extension assessments. Critical initial flaws are calculated using the Paris Law (BS 7910) and cumulative fatigue crack growth in two ways: with and without an integrated and consistent check for fracture instability. The results are compared with those from S-N fatigue analyses and recommendations are provided.
Higher-order Hamilton–Jacobi perturbation theory for anisotropic heterogeneous media: dynamic ray tracing in ray-centred coordinates (2021)

SUMMARY Dynamic ray tracing is a robust and efficient method for computation of amplitude and phase attributes of the high-frequency Green’s function. A formulation of dynamic ray tracing in Cartesian coordinates was recently extended to higher orders. Extrapolation of traveltime and geometrical spreading was demonstrated to yield significantly higher accuracy—for isotropic as well as anisotropic heterogeneous 3-D models of an elastic medium. This is of value in mapping, modelling and imaging, where kernel operations are based on extrapolation or interpolation of Green’s function attributes to densely sampled 3-D grids. We introduce higher-order dynamic ray tracing in ray-centred coordinates, which has certain advantages: (1) such coordinates fit naturally with wave propagation; (2) they lead to a reduction of the number of ordinary differential equations; (3) the initial conditions are simple and intuitive and (4) numerical errors due to redundancies are less likely to influence the computation of the Green’s function attributes. In a 3-D numerical example, we demonstrate that paraxial extrapolation based on higher-order dynamic ray tracing in ray-centred coordinates yields results highly consistent with those obtained using Cartesian coordinates. Furthermore, in a 2-D example we show that interpolation of dynamic ray tracing quantities along a wavefront can be done with much better consistency in ray-centred coordinates than in Cartesian coordinates. In both examples we measure consistency by means of constraints on the dynamic ray tracing quantities in the 3-D position space and in the 6-D phase space.
Residual stress analysis of in situ surface layer heating effects on laser powder bed fusion of 316L stainless steel (2021)

Fabricating parts using laser powder bed fusion (LPBF) is of growing interest to many fields, ranging from medical to aerospace, but this process is often plagued with residual stresses that can reach magnitudes as high as the yield strength of the material. Previous work has demonstrated the ability to reduce residual stress during LPBF by over 90% using an in situ annealing method that makes use of large area, shaped light illumination from a set of laser diodes. In this work, an in-depth analysis of the effectiveness of this in situ residual stress reduction technique is presented. A custom LPBF system was used to fabricate 316L stainless steel parts, and the stresses of these parts were analyzed using the contour method and neutron diffraction on various planes within the samples. These spatial measurements revealed stress reductions near the edges and base of the samples in each of the three measured orthogonal stress directions, in addition to an overall reduction in stress owing to in situ application of laser diode heating. The experimental results were found to be in excellent agreement with numerical thermomechanical simulations that captured the effects of various processing parameters. Furthermore, in cases where the annealing was only performed once every 5 layers, the residual stress was similarly reduced, which indicates that further optimization might be achieved to limit additional processing time during the builds while still relieving equivalent amounts of stress.
Fe/N/C Nanotubes with Atomic Fe Sites: A Highly Active Cathode Catalyst for Alkaline Polymer Electrolyte Fuel Cells (2017)

Fe-containing N-doped carbons (Fe/N/C) are a promising Pt-alternative catalyst for the oxygen reduction reaction (ORR) and are believed to be more stable in alkaline media than in acids and thus particularly suitable to be applied as the cathode catalyst for alkaline polymer electrolyte fuel cells (APEFCs). However, there has hitherto been no successful report on high-performance APEFC based on the Fe/N/C cathode, the reason for which is still not quite clear. Here we report a high-performance Fe/N/C catalyst and its application in APEFC. The catalyst precursor is adenosine, an environmentally benign N-rich biomolecule, which is polymerized via a solvothermal process and then carbonized through pyrolysis. The resulting Fe/N/C nanotubes are thoroughly characterized by a variety of microscopy and spectroscopy (SEM, TEM, XRD, XPS, Raman, Mössbauer, and STEM-EELS), which reveal a high surface N/C ratio (8 at%) and atomic Fe sites well dispersed at the wall of the nanotubes. The catalytic sites are identified to be Fe–N4. The volume-specific catalytic activity of the Fe/N/C catalyst toward the ORR is as good as that of the commercial 20 wt % Pt/C catalyst in alkaline solutions, and better in durability. The electronic conductivity of Fe/N/C turns out to be trivial in rotating-disk electrode experiments but key for fuel cell tests. The APEFC with Fe/N/C cathode (2 mg/cm2 in catalyst loading) exhibits a peak power density greater than 450 mW/cm2, the thus-far highest record in the literature for APEFC using a nonprecious metal cathode. Our findings not only deepen the understanding of the structure–activity relationship of the Fe/N/C catalyst but also mark a step toward its real application in APEFC.
10 x 10 Gb/s cross-phase modulation suppressor for multispan transmissions using WDM narrow-band fiber Bragg gratings (2000)

We present a 10/spl times/10-Gb/s cross-phase modulation suppressor based on series of WDM narrow-band fiber Bragg gratings. Its effectiveness is demonstrated in a 5/spl times/100-km transmission over nonzero dispersion-shifted fiber. When the device is inserted within the repeaters of the link, the observed bit-error-rate floor due to cross-phase modulation disappears, and a low penalty is obtained over a large range of residual dispersions, allowing the transmission of a larger number of channels over longer distances.
Combination of CNN-GRU Model to Recognize Characters of a License Plate number without Segmentation (2019)

Recognition is a genre of manipulation of digitized image automation for discovering the number plate details from a given image. Due to various factors, it is difficult to achieve great recognition results for the license plate. In general, human beings can easily read characters in license plate, but the machine cannot do until it is trained to do so. Now a day's vehicles are increasing day by day, to note down every vehicle plate number manually is difficult. To avoid that, optical character recognition (OCR) technology is used which extracts the license plate directly. In this paper, CNN (convolution neural network) -GRU (gated recurrent unit) model is developed. CNN is used for feature extraction and GRU is used for sequencing without using any segmentation methods. Finally, the character is recognized by utilizing a model design which is prepared on the dataset by GRU unit. A deep learning technique increases performance than traditional approaches like template matching. The testing precision of the proposed framework is 100% and training accuracy is 90%.
Wayfinding and Navigation for People with Disabilities Using Social Navigation Networks (2014)

To achieve safe and independent mobility, people usually depend on published information, prior experience, the knowledge of others, and/or technology to navigate unfamiliar outdoor and indoor environments. Today, due to advances in various technologies, wayfinding and navigation systems and servic
Cartilage-mimicking, Super Lubricious Bearing Surface Extends Longevity of Artificial Joint Replacements (2011)

Artificial joint replacement is an effective treatment for patients with severe arthritis whose number has been increasing due to the expansion of the elderly population. In artificial joint replacements with considerably less efficient lubrication, polyethylene (PE) wear leading to osteolysis and aseptic loosening limits the longevity of total hip arthroplasty (THA). As a result, the quality of all artificial joint replacements is becoming increasingly important. In natural synovial joints under physiological conditions, fluid thin-film lubrication by the hydrated intermediate layer (hydration lubrication) of cartilage is known to be essential for the smooth motion of the joints. A surface gel layer of poly (2-methacryloyloxyethyl phosphorylcholine) (MPC) with cartilage-mimicking structures on a cross-linked PE (CLPE) surface, which may realize ideal hydrophilicity and lubricity resembling the physiological joint surface, has been developed for reducing wear. The suggested approaches for bio-mimicking are surely novel in the field of orthopaedic biomaterials science. The cartilage-mimicking, super lubricious surface of the MPC-grafted CLPE could extend longevity of artificial joint replacement.