gebhart/patrepeval huggingface dataset:
Investigating the Coupled Effects Between Rotor-Blade Aeroelasticity and Tip Vortex Stability (2020)

Abstract The relationship between rotor-blade aeroelasticity and tip-vortex stability is investigated numerically. An aeroelastic framework based on the free-vortex wake and finite element methods is employed to model a subscaled helicopter rotor in hover and forward-tilted conditions. A linear eigenvalue stability analysis is performed on tip vortices to associate the coupled impact of aeroelastic effects and vortex evolution. Prior numerical investigations have shown that highly flexible wind turbine rotor-blades have the potential to decrease levels of the instability of tip vortices. The present work focuses on testing these findings against a subscaled rotor within the range of helicopter operational rotation frequencies. The presented work aims to develop further insight into rotor-wake interactions and blade-vortex interaction to explore the mitigation of adverse rotorcraft operational conditions, such as their effect on aerodynamic-induced airframe vibrations and the associated life-cycle fatigue performance.
Impact of Plasma Treatment of n-Al0.87Ga0.13N:Si Surfaces on V/Al/Ni/Au Contacts in Far-UVC LEDs (2023)

We investigated the effect of treating the surface of n-Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.87</sub> Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.13</sub> N:Si by O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> or SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> plasma on the properties of subsequently deposited and annealed V/Al/Ni/Au contacts. Whereas an O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> plasma treatment increases the contact resistivity, an SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> plasma treatment decreases it. The operating voltage of far-UVC LEDs emitting at 233 nm could thus be reduced by 2.2 V for a current of 50 mA. The results underline the detrimental impact of oxygen on the formation of low-resistance contacts on n-AlGaN surfaces with high Al mole fraction.
Treating Neglect by Body Movements: A Case Report and Follow-Up Study (P3.043) (2014)

OBJECTIVE: To evaluate whether encouraging midline-body movements may increase spatial exploration in people with spatial neglect. BACKGROUND: Visual scanning has only shown mixed results in the rehabilitation of left spatial neglect, a disorder of spatially asymmetric attention and action, accompanied by functional disability. Adding body-centered instructions may improve spatial performance, but cuing right body movements could increase rightward bias. Here, we compared instructions using either midline or non-midline body parts, to enhance left-side spatial exploration in right-brain stroke survivors with spatial neglect. METHODS: A 68-year-old woman with spatial neglect (Behavioral Inattention Test score=28, Catherine Bergego Scale=24) after right basal ganglia infarct made errors identifying left-sided objects (pen, keys, phone). She was prompted using four instructions: “look to the left”, “point with your nose to the left”, “point with your [right] hand to the left”, and “stick out your tongue and point it to the left” (12 trials per instruction). RESULTS: Our patient named left-sided objects in 42% of trials looking left; 50% of trials moving the nose left, 0% of trials moving the hand left, and 100% of trials moving the tongue left. A chi-square test showed performance significantly improved when cuing with midline (nose, tongue), versus non-midline (looking, hand), body parts (X2=9.11, p=0.003). We then tested 10 more consecutive neglect patients using 15 trials per instruction, but only 4 made any errors naming the objects [48% of trials correct with looking, 38% with nose, 32% with hand, 42% with tongue]. DISCUSSION: Our initial neglect patient named left-sided objects better when cued to move midline structures to the left. If midline structures are represented more bilaterally in the brain, they may be less affected by body-centered “aiming” bias. Future research would examine whether cueing with the nose/tongue is selectively helpful for patients with more severe neglect or with “aiming” bias and limb akinesia. STUDY SUPPORTED BY: National Institutes of Health and Kessler Foundation.
Real-time continuous estimation of dross attachment in the laser cutting process based on process emission images (2020)

Laser cutting of metals has become the reference manufacturing technology in sheet metal working thanks to the flexibility and the increased productivity it offers when compared with other competitive technologies. Considering, in particular, the fusion-cutting mode, i.e., when nitrogen is used as an assisting gas, different aspects contribute to the process quality among which dross attachment plays the most important role. To cope with the related time-dependent deterioration of the process quality and to obtain an online adaptation of the process parameters for different working conditions, a closed-loop dross regulation system is needed. To realize it, a reliable, continuous, and accurate estimation of the dross is mandatory. This work focuses on this challenging problem, presenting and comparing different approaches to estimate the dross attachment based on the process emission collected by a coaxial camera. Specifically, a method which relies on the accurate analysis of the process emissions for determining an effective classification method is compared with a deep-learning approach based on convolutional neural networks. The obtained results, validated in real experimental conditions, confirm the possibility to accurately estimate the presence of significant dross attachment in real-time and open the way to the design of a closed-loop control algorithm for the real-time regulation of the dross attachment formation and consequently of the process quality.
Power requirements for magneto-optic modulation devices, a theoretical study (1974)

Abstract : Switching and modulation of laser light at 1.152 micrometer in magnetooptic waveguides of garnet films has been reported by Tien et al. In particular, they report modulation up to frequencies of 80 MHz and about 50% conversion of light between TE and TM waveguide modes over distances of about 8 mm achieved with a serpentine circuit carrying 0.5 ampere. No comprehensive theoretical analysis of such a device has yet appeared, and questions concerning the ultimate bandwidth, degree of miniaturization, electrical power requirements, and channel compatibility have remained unanswered. This report represents an initial attempt to answer some of these questions. Specifically, power requirements for reasonable film parameters and electrode configurations are considered. Crucial for the analysis described is the proposal of a model which can represent adequately the performance of magnetooptic waveguides and simultaneously be simple enough to be analytically tractable. The model used in the present study is delineated, a summary of the significant equations is presented, and the results and conclusions are summarized.
Electronic Properties at Gold/Conjugated‐Polyelectrolyte Interfaces (2008)

The chemical structures and electronic structures at conjugated polyelectrolyte/Au interfaces demonstrate that conjugated polyelectrolytes with identical backbones but different pendant charges and charge-compensating ions exhibit different electronic properties. This finding shows that counterions and backbone charges enable control of the electronic and chemical nature of critical device interfaces.
X-ray scatter signatures for normal and neoplastic breast tissues (1999)

Measurements of breast tissue scattering properties have been made in an energy dispersive x-ray diffraction system over the momentum transfer range of 0.70 to 3.50 nm(-1). One hundred samples of excised tissue have been used. Results from the diffraction system have been compared with the histological analysis for each individual sample. It has been found that tissue types can be characterized on the basis of the shape of the scatter spectrum and on its relative intensity. The shapes are significantly different between tissue types in the range 1.0 to 1.8 nm(-1) and suggest that if particular values of momentum transfer are monitored, a discriminating signal could be obtained. Analysis of the maximum intensity in the signature also reveals a change of up to a factor of 2 between adipose and fat-free tissues.
Prototyping the MBTAC Processor for the REPLICA CMP (2014)

Current chip multiprocessors (CMP) have mostly been designed by replicating sequential/single core processors and providing some support for operating them with a shared memory. As a result of this, they define asynchronous computational model of threads, often require maximizing the locality of memory references to get decent performance, and feature high intercommunication overheads, that make parallel programming tedious for general purpose functionalities. Most of these problems can be eliminated by designing the processors architecture for scalable general purpose computing from the very beginning like done in processors for configurable emulated shared memory (CESM) CMPs. They provide support for machine instruction-level synchronization, make use of multithreading to support latency-insensitive computation, and promote the concept of uniform synchronous shared memory for easy variable allocation and convenient data exchange. In our earlier work we have proposed the first CESM architecture TOTAL ECLIPSE composed of early MBTAC processors making use of very low-overhead multithreading, parallel computing savvy functional unit organization, support for fast synchronization between the instructions and threads, and highly efficient multioperations. Unfortunately, certain key parts of these processors turned out to be hardly implementable and overall they lacked support for ordered multiprefix operations and full configurability of the CESM scheme. In this paper we introduce a new fully configurable version of the MBTAC-processor for our new REPLICA CESM architecture and the first FPGA implementations of it. To evaluate it, we execute short test programs on it and compare it preliminary against Intel Core i7 and DLX processors. Our FPGA design flow and testing approach are described.
Magic-angle spinning proton NMR imaging of polybutadiene/polystyrene blends (1989)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagic-angle spinning proton NMR imaging of polybutadiene/polystyrene blendsD. G. Cory, J. C. De Boer, and W. S. VeemanCite this: Macromolecules 1989, 22, 4, 1618–1621Publication Date (Print):April 1, 1989Publication History Published online1 May 2002Published inissue 1 April 1989https://pubs.acs.org/doi/10.1021/ma00194a020https://doi.org/10.1021/ma00194a020research-articleACS PublicationsRequest reuse permissionsArticle Views176Altmetric-Citations54LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Dynamical parameter estimation using realistic photodetection (2004)

We investigate the effect of imperfections in realistic detectors upon the problem of quantum state and parameter estimation by continuous monitoring of an open quantum system. Specifically, we have reexamined the system of a two-level atom with an unknown Rabi frequency introduced by Gambetta and Wiseman [Phys. Rev. A 64, 042105 (2001)]. We consider only direct photodetection and use the realistic quantum trajectory theory reported by Warszawski, Wiseman, and Mabuchi [Phys. Rev. A 65, 023802 (2002)]. The most significant effect comes from a finite bandwidth, corresponding to an uncertainty in the response time of the photodiode. Unless the bandwidth is significantly greater than the Rabi frequency, the observer's ability to obtain information about the unknown Rabi frequency, and about the state of the atom, is severely compromised. This result has implications for quantum control in the presence of unknown parameters for realistic detectors, and even for ideal detectors, as it implies that most of the information in the measurement record is contained in the precise timing of the detections.
Anaerobic CO–oxidizing, H 2–producing prokaryotes from volcanic habitats (2002)

El autor González Grau, Juan Miguel pertenece actualmente al Instituto de Recursos Naturales y Agrobiología de Sevilla
Spectral radii of asymptotic mappings and the convergence speed of the\n standard fixed point algorithm (2018)

Important problems in wireless networks can often be solved by computing\nfixed points of standard or contractive interference mappings, and the\nconventional fixed point algorithm is widely used for this purpose. Knowing\nthat the mapping used in the algorithm is not only standard but also\ncontractive (or only contractive) is valuable information because we obtain a\nguarantee of geometric convergence rate, and the rate is related to a property\nof the mapping called modulus of contraction. To date, contractive mappings and\ntheir moduli of contraction have been identified with case-by-case approaches\nthat can be difficult to generalize. To address this limitation of existing\napproaches, we show in this study that the spectral radii of asymptotic\nmappings can be used to identify an important subclass of contractive mappings\nand also to estimate their moduli of contraction. In addition, if the fixed\npoint algorithm is applied to compute fixed points of positive concave\nmappings, we show that the spectral radii of asymptotic mappings provide us\nwith simple lower bounds for the estimation error of the iterates. An immediate\napplication of this result proves that a known algorithm for load estimation in\nwireless networks becomes slower with increasing traffic.\n
DNA conformation on surfaces measured by fluorescence self-interference (2006)

The conformation of DNA molecules tethered to the surface of a microarray may significantly affect the efficiency of hybridization. Although a number of methods have been applied to determine the structure of the DNA layer, they are not very sensitive to variations in the shape of DNA molecules. Here we describe the application of an interferometric technique called spectral self-interference fluorescence microscopy to the precise measurement of the average location of a fluorescent label in a DNA layer relative to the surface and thus determine specific information on the conformation of the surface-bound DNA molecules. Using spectral self-interference fluorescence microscopy, we have estimated the shape of coiled single-stranded DNA, the average tilt of double-stranded DNA of different lengths, and the amount of hybridization. The data provide important proofs of concept for the capabilities of novel optical surface analytical methods of the molecular disposition of DNA on surfaces. The determination of DNA conformations on surfaces and hybridization behavior provide information required to move DNA interfacial applications forward and thus impact emerging clinical and biotechnological fields.
Discovery of Orally Bioavailable and Liver-Targeted Hypoxia-Inducible Factor Prolyl Hydroxylase (HIF-PHD) Inhibitors for the Treatment of Anemia (2018)

We report herein the design and synthesis of a series of orally active, liver-targeted hypoxia-inducible factor prolyl hydroxylase (HIF-PHD) inhibitors for the treatment of anemia. In order to mitigate the concerns for potential systemic side effects, we pursued liver-targeted HIF-PHD inhibitors relying on uptake via organic anion transporting polypeptides (OATPs). Starting from a systemic HIF-PHD inhibitor (<b>1</b>), medicinal chemistry efforts directed toward reducing permeability and, at the same time, maintaining oral absorption led to the synthesis of an array of structurally diverse hydroxypyridone analogues. Compound <b>28a</b> was chosen for further profiling, because of its excellent in vitro profile and liver selectivity. This compound significantly increased hemoglobin levels in rats, following chronic QD oral administration, and displayed selectivity over systemic effects.
Human from Blur: Human Pose Tracking from Blurry Images (2023)

We propose a method to estimate 3D human poses from substantially blurred images. The key idea is to tackle the inverse problem of image deblurring by modeling the forward problem with a 3D human model, a texture map, and a sequence of poses to describe human motion. The blurring process is then modeled by a temporal image aggregation step. Using a differentiable renderer, we can solve the inverse problem by backpropagating the pixel-wise reprojection error to recover the best human motion representation that explains a single or multiple input images. Since the image reconstruction loss alone is insufficient, we present additional regularization terms. To the best of our knowledge, we present the first method to tackle this problem. Our method consistently outperforms other methods on significantly blurry inputs since they lack one or multiple key functionalities that our method unifies, i.e. image deblurring with sub-frame accuracy and explicit 3D modeling of non-rigid human motion.
Supplementary Figure 3 from Dual-specific Chimeric Antigen Receptor T Cells and an Indirect Vaccine Eradicate a Variety of Large Solid Tumors in an Immunocompetent, Self-antigen Setting (2023)

&lt;p&gt;CAR T cells lacking the pMEL TCR are less effective than CARaMEL T cells at inhibiting tumor growth.&lt;/p&gt;
Tracking Hand Articulations: Relying on 3D Visual Hulls Versus Relying on Multiple 2D Cues (2013)

We present a method for articulated hand tracking that relies on visual input acquired by a calibrated multicamera system. A state-of-the-art result on this problem has been presented in [12]. In that work, hand tracking is formulated as the minimization of an objective function that quantifies the discrepancy between a hand pose hypothesis and the observations. The objective function treats the observations from each camera view in an independent way. We follow the same general optimization framework but we choose to employ the visual hull [10] as the main observation cue, which results from the integration of information from all available views prior to optimization. We investigate the behavior of the resulting method in extensive experiments and in comparison with that of [12]. The obtained results demonstrate that for low levels of noise contamination, regardless of the number of cameras, the two methods perform comparably. The situation changes when noisy observations or as few as two cameras with short baselines are employed. In these cases, the proposed method is more accurate than that of [12]. Thus, the proposed method is preferable in real-world scenarios with noisy observations obtained from easy-to-deploy, stereo camera setups.
Accuracy and Performance of the Network Location Provider in Android Devices (2020)

Today, nearly every smartphone can provide a network location alongside the traditional method of using the Global Navigation Satellite System (GNSS). The Android location engine is made up of two primary location providers: the GPS Location Provider (GLP), and the Network Location Provider (NLP). The recommended location service in Android is the Fused Location Provider (FLP), a location application interface (API) from Google which combines information from the GLP and NLP. The FLP is intended to be the ultimate positioning solution in Android, but it has been observed that in instances of GNSS spoofing, the FLP will trust the spoofed signals even in cases where the NLP provides a reliable estimate for the position of the device. In this paper, we describe the methods of the NLP, which include Wi-Fi fingerprinting, or scanning for visible Wi-Fi access points to build a radio map that can be used by devices to provide an estimated location. Furthermore, we test the accuracy of the NLP in the following scenarios: indoor, residential, urban, and canyon. Also, when available, we compare the NLP location to truth in order to assess the potential of the NLP in providing a reliable positioning solution and detecting the presence of GNSS spoofing. In addition, a correlation analysis between the accuracy of the NLP and the number of available Wi-Fi access points is carried out. This study is an assessment of the current accuracy and performance of NLP in Android devices. However, it is important to note that the performance of the NLP will only improve with the advent of 5G technology and Wi-Fi RTT Ranging. The growing network positioning infrastructure combined with the widespread availability of Wi-Fi access points will render the NLP more relevant than ever. The assessed accuracy of the NLP provides a deeper insight into its potential to aid in the detection and mitigation of GNSS spoofing.
Recursive pattern: a technique for visualizing very large amounts of data (2002)

An important goal of visualization technology is to support the exploration and analysis of very large amounts of data. In this paper, we propose a new visualization technique called a 'recursive pattern', which has been developed for visualizing large amounts of multidimensional data. The technique is based on a generic recursive scheme which generalizes a wide range of pixel-oriented arrangements for displaying large data sets. By instantiating the technique with adequate data- and application-dependent parameters, the user may greatly influence the structure of the resulting visualizations. Since the technique uses one pixel for presenting each data value, the amount of data which can be displayed is only limited by the resolution of current display technology and by the limitations of human perceptibility. Beside describing the basic idea of the 'recursive pattern' technique, we provide several examples of useful parameter settings for the various recursion levels. We further show that our 'recursive pattern' technique is particularly advantageous for the large class of data sets which have a natural order according to one dimension (e.g. time series data). We demonstrate the usefulness of our technique by using a stock market application.
Solution Structure of the HumanCD4 (403-419) Receptor Peptide (1996)

The cytoplasmic part of CD4 is known to be essential for the interaction with the human immunodeficiency virus type 1 proteins Vpu and Nef. The 17 amino acid synthetic peptide CD4 (403-419) with the amino acid sequence of the membrane proximal part of the cytoplasmic domain of the human CD4 receptor was structurally investigated by circular dichroism and nuclear magnetic resonance spectroscopy. The average a-helical content of the peptide could be estimated to be around 25%. Chemical shift index analysis and the connectivity pattern in nuclear Overhauser enhancement spectra located the α-helical part of the peptide from Gln403 to Arg412. It may be speculated that this amphipathic a-helix is the contact region with the Vpu and Nef proteins.