gebhart/patrepeval huggingface dataset:
Trapdoor Assignment of PEKS-based NDN Strategy in Two-Tier Networks (2020)

Named Data Networking (NDN), where addressable content name is used, is a candidate of next-generation Internet architectures. NDN routers use In-Network cache to replicate and store passing packets to make faster content delivery. NDN uses human-readable names, and therefore, it is easy for an attacker to guess which content is requested. To solve this issue, we have proposed the application of Public Key Encryption with Keyword Search (PEKS) to NDN and a PEKS-based NDN strategy has been developed for forwarding packets. Applying the PEKS scheme produces latency during transmission because of cryptographic operations. To reduce the number of such operations, we consider a network environment based on Two- Tier network design and examine different trapdoor assignments of PEKS-based NDN. We show some evidences that setting trapdoor storage only at core routers in Two-Tier network gives the reduction of the cryptographic operations.
Workshop and Publication Working Group on High Power Microwave Sources and Technologies (2000)

Abstract : A workshop was convened from June 3-12, 1999 at the University of New Mexico's Maui High Performance Computing Center. The purpose of the workshop was to bring together contributors to an IEEE Press Book entitled Advances in High Power Microwave Sources and Technologies in order to draft the initial manuscript. Workshop participants discussed competing ideas and converged on an initial draft. The scientific papers presented at the workshop thus comprise the book draft. Goals were then made for finalizing the book, having assigned tasks to each of the contributors. There will be 12 chapters describing recent advances in AFOSR-funded high power microwave research. Each chapter is led by a Chapter Master whose task is to coordinate the contributions from the chapter coauthors. In addition to this aspect of the workshop, technical sessions discussing the role of high performance computing on high power microwave tube design were also held. There were 29 registered attendees at the workshop.
Formulas for Maximum Appropriate Hydrophone Sensitive Element Size and Hydrophone Spatial Averaging Correction Factors for Therapeutic Ultrasound System Characterization (2022)

Therapeutic ultrasound devices can generate beams that are tightly focused or very nonlinear or both. When these beams are detected with hydrophones, pressure measurements are reduced due to spatial averaging of the incident pressure field across the phase sensitive hydrophone active element. Numerical simulations were conducted for 9 spherically focused transducers, with center frequencies ranging from 1 to 10 MHz and F numbers (ratio of focal length to diameter) ranging from 1.4 to 3.2. The simulated transducers were subjected to 6 levels of transmit voltage, resulting in a 6 levels of beam nonlinearity ranging from low to high harmonic content. The beams were detected with 8 different simulated hydrophones, one at a time, at the focal point. Simulation code was tested with experiments performed using 7 spherically focused transducers, with frequencies ranging from 2 to 10 MHz and F numbers ranging from 1 to 3. Five hydrophones were used, one at a time, to measure beam pressures at the focal point. Formulas were derived to mitigate measurement errors due to spatial averaging. These formulas are briefly summarized in Appendix A of [1]. Formulas for maximum acceptable active element diameter as functions of required measurement accuracy were also obtained [1]. While the commonly used IEC formula for maximum acceptable active element diameter [2] is based on linear beams from planar sources, the new formulas apply to both linear and nonlinear beams from focused sources. Therefore, the new formulas are more suitable for therapeutic ultrasound.
Elimination of photorefractive grating writing instabilities during contradirectional two-wave mixing in iron-doped lithium niobate (2003)

Summary form only given. Contra-directional two-beam coupling (TBC) in LiNbO/sub 3/:Fe has been a recent subject of investigation. By measuring the power of the transmitted beam, one can monitor the coupling efficiency of the PR gratings. However, repeated jumps (fast instability) in the transmitted and reflected beams have been observed and are attributed to the "quasi-breakdown" of the uniform component of the photovoltaic (PV) field., The fast instability has not previously been explored in detail.
A parallel hash join algorithm for managing data skew (1993)

Presents a parallel hash join algorithm that is based on the concept of hierarchical hashing, to address the problem of data skew. The proposed algorithm splits the usual hash phase into a hash phase and an explicit transfer phase, and adds an extra scheduling phase between these two. During the scheduling phase, a heuristic optimization algorithm, using the output of the hash phase, attempts to balance the load across the multiple processors in the subsequent join phase. The algorithm naturally identifies the hash partitions with the largest skew values and splits them as necessary, assigning each of them to an optimal number of processors. Assuming for concreteness a Zipf-like distribution of the values in the join column, a join phase which is CPU-bound, and a shared nothing environment, the algorithm is shown to achieve good join phase load balancing, and to be robust relative to the degree of data skew and the total number of processors. The overall speedup due to this algorithm is compared to some existing parallel hash join methods. The proposed method does considerably better in high skew situations.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
FPGA Particle Graphics Hardware (2005)

Particle graphics simulations are well suited for modeling phenomena such as water, cloth, explosions, fire, smoke, and clouds. They are normal realized in software, as pan of an interactive graphics application, such as a video game. Their use in such applications is limited by the computational burden and resource competition they create for a host application. We present the design of a hardware particle machine, for implementation in an FPGA, intended for accelerating real-time panicle graphics in applications such as video games. The particle machine is a system that completely contains, manages, and executes particle graphics simulations and rendering. The particle machine is a system comprised of particle memory, a controller, and the panicle pipe, a pipelined particle update processor. The panicle pipe has been synthesized to 130 MHz, on an Altera Stratix FPGA, resulting in a potential throughput of 2.1 million PPF (panicles per frame). This throughput is achieved with minimal load on application and main system performance.
80‐2: Spatiochromatic Model for Image‐Quality Prediction of High‐Dynamic‐Range and Wide‐Color‐Gamut Content (2020)

This paper presents an approach to predicting image quality by spatially filtering images before generating color difference maps with pixel‐based color difference metrics. The resulting difference maps can then be pooled across the whole image. This approach was originally developed for CIELAB color space under the name S‐CIELAB. We extend this approach to use the recently developed IC T C P color space to improve the prediction accuracy for high dynamic range and wide color gamut images. The filtering is based on the chromatic and achromatic contrast sensitivity function of the human visual system. Our results on four existing subjective image quality databases containing high dynamic range and wide color gamut images show substantial improvements at low computational cost, outperforming existing color difference metrics.
[O1‐03‐05]: In vivo detection of amyloid plaques in AD transgenic mice using gadolinium labeled ligands by MRI (2005)

A technique that will allow visualization of amyloid plaques prior to clinical impairment will be important for prophylactic treatment for Alzheimer's disease (AD). Magnetic resonance imaging(MRI) has better spatial resolution than positron enhanced tomography (PET) and is, therefore, a more appropriate technique for earlyamyloid detection. We have previously reported on invivo μMRI detection of plaques following intra1carotid injection of Gd-DTPA-Aβ1-40 in AD model mice. However, Aβ1-40 has been shown to be toxic in tissue culture and can potential seed amyloid plaque growth. In the present study we have developed non-toxic probes, that are homologous to Aβ, that can be administered for early amyloid plaque detection in vivo. The instrument consisted of a SMIS console interfaced to a 7T horizontal bore magnet equipped with 250mT/m actively shielded gradients. μMRI was performed in Tg2576 APP mice, APP/PS1 mice and wild-type controls prior to injection and following intra-carotid and intravenous injection with gadolinium-DTPA-K6Aβ1-30 or identically tagged Aβ1-40 as control. For 2D- and 3D-imaging, a gradient echo T2*-weighted sequence was used with imaging times of 55 min and 115 min, respectively. The advantage of 3D-imaging approach is that the image set can be reprocessed in any desired slice orientation, facilitating image comparison during longitudinal studies and co-registration with histology. Imaging scans were compared to brain sections stained for amyloid plaques. Large plaques were detected in vivo prior to injection of contrast agent. Following injection, the contrast of these plaques was enhanced and additional smaller plaques were observed. Such an imaging approach may work more effectively in humans where a lower resolution is needed because of a larger brain size and plaque diameter.
A new end-to-end probing and analysis method for estimating bandwidth bottlenecks (2002)

We present a network friendly bandwidth measurement method, TOPP, that is based on active probing and includes analysis by segmented regression. This method can estimate two complementing available bandwidth metrics in addition to the link bandwidth of the congested link. Contrary to traditional packet pair estimates of the bottleneck link bandwidth, our estimate is not limited by the rate at which we can inject probe packets into the network. We also show that our method is able to detect bottlenecks that are invisible to methods such as the C-probe. Further more, we describe scenarios where our analysis method is able to calculate bandwidth estimates for several congested hops based on a single end-to-end probe session.
Lack of synergistic interaction between the two mechanisms of action of tapentadol in gastrointestinal transit (2014)

We believe this is the first published evaluation of mechanistic interaction for a surrogate measure of adverse effect of a single compound with two mechanisms of action, and the results suggest that there is a greater separation between the analgesic and gastrointestinal effects of tapentadol than expected based upon its analgesic efficacy.
Mechanical Fatigue of Hybrid Glasses (2010)

Mechanical fatigue is a potent mechanism of material degradation. Cyclic loading is shown to accelerate crack growth in a ZrOx/epoxysilane film, demonstrating that hybrid organic–inorganic glasses can be susceptible to fatigue. Plasticity-driven fatigue is evidenced by nanometer-high striations on the fracture surfaces. The molecular origin of plasticity in these glasses is discussed with the aid of molecular dynamics simulations.
Water Vapor Permeation Resistance of Polycarbonate at Various Temperatures (2009)

The permeation rate of water vapor through polycarbonate (PC) was examined. Permeability (P), diffusion (D), and solubility (S) coefficients were measured at temperatures ranging from 25 to 80 °C. P values remained almost constant over this temperature range. On the other hand, D values increased and S values decreased exponentially with temperature. These data represent a broad map of the mass-transport characteristics of water through PC, which can be used to estimate break-though times, permeation rates, absorption, desorption/outgassing, and moisture content over a wide range of temperature and humidity.
ChemInform Abstract: Synthesis of Vicinal Amino Alcohols via a Tandem Acylnitrene Aziridination‐Aziridine Ring Opening. (1997)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Highly Luminescent, Neutral, Nine‐Coordinate Lanthanide(III) Complexes (2007)

Abstract Using a simple ligand design, we have prepared neutral, nine‐coordinate lanthanide complexes that exclude water from the inner coordination sphere, thus leading to high emission quantum yields and long excited‐state lifetimes. The complexes form in high synthetic yields (49–87 %) by simply mixing the ligand and the lanthanide. Visible luminescence from Eu III ( Φ = 60 %, τ = 2.2 ms) and Tb III ( Φ = 7 %, τ = 0.2 ms) and near‐infrared luminescence from Yb III ( Φ = 0.7 %), Nd III and Er III were observed in acetonitrile and CH 2 Cl 2 at room temperature. In addition, the Gd III complex was prepared to gain information about the triplet state of the ligand. (© Wiley‐VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2007)
Structural and Biochemical Analyses of Choroidal Thickness in Human Donor Eyes (2014)

Consistent with clinical imaging observations, geographic atrophy was associated with choroidal thinning. Biochemical data suggest an alteration in the balance between proteases and protease inhibitors in eyes that lie at the extremes of choroidal thickness. An improved understanding of the basic mechanisms associated with choroidal thinning may guide the development of new therapies for AMD.
Model-driven SOA for sensor networks (2011)

Our previous work has explored the application of enterprise middleware techniques at the edge of the network to address the challenges of delivering complex sensor network solutions over heterogeneous communications infrastructures. In this paper, we develop this approach further into a practicable, semantically rich, model-based design and analysis approach that considers the sensor network and its contained services as a service-oriented architecture. The proposed model enables a systematic approach to service composition, analysis (using domain-specific techniques), and deployment. It also enables cross intelligence domain integration to simplify intelligence gathering, allowing users to express queries in structured natural language (Controlled English).
Studies on Normal and Microgravity Annular Two Phase Flows (1999)

Two-phase gas-liquid flows occur in a wide variety of situations. In addition to normal gravity applications, such flows may occur in space operations such as active thermal control systems, power cycles, and storage and transfer of cryogenic fluids. Various flow patterns exhibiting characteristic spatial and temporal distribution of the two phases are observed in two-phase flows. The magnitude and orientation of gravity with respect to the flow has a strong impact on the flow patterns observed and on their boundaries. The identification of the flow pattern of a flow is somewhat subjective. The same two-phase flow (especially near a flow pattern transition boundary) may be categorized differently by different researchers. Two-phase flow patterns are somewhat simplified in microgravity, where only three flow patterns (bubble, slug and annular) have been observed. Annular flow is obtained for a wide range of gas and liquid flow rates, and it is expected to occur in many situations under microgravity conditions. Slug flow needs to be avoided, because vibrations caused by slugs result in unwanted accelerations. Therefore, it is important to be able to accurately predict the flow pattern which exists under given operating conditions. It is known that the wavy liquid film in annular flow has a profound influence on the transfer of momentum and heat between the phases. Thus, an understanding of the characteristics of the wavy film is essential for developing accurate correlations. In this work, we review our recent results on flow pattern transitions and wavy films in microgravity.
Speaker diarisation and longitudinal linking in multi-genre broadcast data (2015)

This paper presents a multi-stage speaker diarisation system with longitudinal Linking developed on BBC multi-genre data for the 2015 Multi-Genre Broadcast (MGB) challenge. The basic speaker diarisation system draws on techniques from the Cambridge March 2005 system with a new deep neural network (DNN)-based speech/non speech segmenter. A newly developed linking stage is next added to the basic diarisation output aiming at the identification of speakers across multiple episodes of the same series. The longitudinal constraint imposes an incremental processing of the episodes, where speaker labels for each episode can be obtained using only material from the episode in question, and those broadcast earlier in time. The nature of the data as well as the longitudinal linking constraint position this diarisation task as a new open-research topic, and a particularly challenging one. Different linking clustering metrics are compared and the lowest within-episode and cross-episode DER scores are achieved on the MGB challenge evaluation set.
Phase-Controlled Few-Cycle Light (2002)

The 1990s brought about dramatic advances in controlling ultrashort-pulse optical 
radiation. The quest for ever shorter laser pulses led to pulse durations as short as 
approximately twice the oscillation period of the carrier field (T0 ≈2.6 fs at λ0=0.8 µm, 
the center wavelength of the titaniumdoped sapphire laser), approaching the limit set by 
the laser cycle (Cheng et al., 1998; Baltuska et al., 1997; Morgner et al., 1999; Sutter et 
al., 1999). Furthermore, the frequency sweep (chirp) and amplitude envelope of 
femtosecond pulses can now be tailored (e.g., Weiner, 2000) for specific applications, 
such as coherent control of molecular dynamics, often referred to as femtochemistry 
(Judson and Rabitz, 1992). Recently it was demonstrated that techniques similar to those 
used for controlling chemical reactions can also be efficiently employed for influencing 
products of strong-field interactions, such as high-harmonic radiation (Bartels et al., 
2000). This process, if driven by few-cycle pulses (Spielmann et al., 1997; Schnurer et 
al., 1998), is capable of delivering X-ray pulses shorter than the oscillation period of the 
driving laser (Drescher et al., 2001) and has the potential to produce pulses shorter than 1 
fs in duration (e.g., Brabec and Krausz, 2000). The parameters of pulses near 1 fs and 
possibly attosecond pulses emerging from this process have been predicted to sensitively 
depend on how the oscillations of the electric fieldfit within the amplitude envelope (de Bohan 
et al., 1998; Tempea et al., 1999). This is determined by φ, which has been referred to as 
the absolute or carrier envelope phase of light pulses (Xu et al., 1996). This parameter, 
which could not be accessed experimentally until recently, is the focus of this chapter. Its 
control and measurement in femtosecond pulses will have dramatic impacts on frequency 
domain and time domain metrology alike.
Effect of Pressure Cycling on Fracture Energy of Polyurethane/Aluminum Adhesive Bonds (2009)

An experimental study was conducted to investigate the effect of pressure-cycling on adhesive bond fracture energy of polyurethane/aluminum adhesive bond joints. Initially, two types of peel tests were conducted to characterize adhesive bond strength and challenges associated with pre-mature polyurethane cracking and failure during these tests are discussed. A modified double cantilever beam (MDCB) specimen configuration was specially designed and opening-mode loading conditions were employed to determine the interfacial adhesive bond energy (GC). The test specimens were pressure-cycled in water-filled tanks for 1 to 4 weeks with an increment of 1 week. The GC of pressure-cycled specimens was compared with both control and water-soaked samples (without pressure-cycling). The results indicated that pressure-cycling decreased GC values to those of the control and water-soaked samples: hence, prolonged pressure-cycling could be problematic to polymer/metal adhesive bonds of hardware installed outboard of submarine pressure hulls.
ChemInform Abstract: A New Perovskite Polytype in the High‐Pressure Sequence of BaIrO3. (2009)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Advancing SPRi Measurements with Novel Biosensors for Studying Surface-Biomolecule Interactions (2010)

Through years of scientific research and development, surface plasmon resonance (SPR) has become a sensitive, quantitative and rapid measurement method with abundant applications in the fields of biology and biomaterials. The present contribution provides a brief overview of SPR history, development of SPR imaging and expanding sensor platforms while also briefly reviewing their many applications. We supplement these discussions with the introduction of new biosensor platforms for SPR imaging 1) composed of the primary mineral component in bone, hydroxyapatite (HA) and 2) tyrosine-derived polycarbonates which are utilized in many biomedical applications. These biosensors are completed with microfluidic flow channels to facilitate kinetic measurements. We describe the fabrication of the multilayer sensor surfaces and also demonstrate surface plasmon generation. We also highlight the utility and potential of these sensor platforms to characterize the binding kinetics of small peptides, engineered to bind specifically to these materials in order to facilitate development of new probes and modifiers for biomaterials.