gebhart/patrepeval huggingface dataset:
Fast techniques for computing finite-length MMSE decision feedback equalizers (2004)

Existing computationally efficient methods for computing the finite length minimum mean-square-error decision feedback equalizers (MMSE-DFE) rely on fast methods for Cholesky decomposition, which may face several implementation difficulties. As the demand for broadband communications increases, developing less complex methods is highly motivated. We propose new techniques for computing the MMSE-DFE coefficients. The new algorithms are obtained by identifying the relationship between the feedforward equalizer computation and well known fast recursive least squares (RLS) adaptive algorithms, and the feedback equalizer as a convolution of the feedforward equalizer with the channel. The proposed algorithms are less complex, more structured, and more stable in finite precision than known methods encountered in the literature.
Color rendition engineering of phosphor-converted light-emitting diodes (2013)

We present an approach to the optimization of the trichromatic spectral power distributions (SPDs) of phosphor-converted (p-c) light-emitting diodes (LEDs) in respect of each of four different color rendition properties (high color fidelity, color saturating, color dulling, and color preference). The approach is based on selecting a model family of Eu<sup>2+</sup> phosphors and finding the optimal peak wavelengths of the phosphor bands as functions of the luminous efficacy of radiation. A blue component due to either phosphor photoluminescence or InGaN electroluminescence with the peak wavelength at about 460 nm was found to be an optimal one for the high-fidelity, color-dulling, and color-preference LEDs. The high-fidelity and color-preference LEDs need red phosphors with the peak wavelength of 610-615 nm. The high-fidelity LEDs were shown to require a true green (~530 nm) phosphor component, whereas a cyan (~510 nm) component is the prerequisite of the color-saturating and color-preference LEDs. Deep-blue (~445 nm) and deep-red (~625 nm) components are required for the color-saturating LEDs. A broad yellow band similar to that of Ce(3+) emission is to be used in the color-dulling LEDs. The SPDs of practical phosphor blends for the high-fidelity, color-saturating, and color-preference p-c LEDs are demonstrated.
Structure-based design of a streptavidin mutant specific for an artificial biotin analogue (2015)

For a multistep pre-targeting method using antibodies, a streptavidin mutant with low immunogenicity, termed low immunogenic streptavidin mutant No. 314 (LISA-314), was produced previously as a drug delivery tool. However, endogenous biotins (BTNs) with high affinity (Kd < 10(-10) M) for the binding pocket of LISA-314 prevents access of exogenous BTN-labelled anticancer drugs. In this study, we improve the binding pocket of LISA-314 to abolish its affinity for endogenous BTN species, therefore ensuring that the newly designed LISA-314 binds only artificial BTN analogue. The replacement of three amino acid residues was performed in two steps to develop a mutant termed V212, which selectively binds to 6-(5-((3aS,4S,6aR)-2-iminohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamido)hexanoic acid (iminobiotin long tail, IMNtail). Surface plasmon resonance results showed that V212 has a Kd value of 5.9 × 10(-7) M towards IMNtail, but no binding affinity for endogenous BTN species. This V212/IMNtail system will be useful as a novel delivery tool for anticancer therapy.
Hot electrons in resonant-phonon terahertz quantum cascade lasers (2005)

The electronic temperatures of individual subbands, the lattice temperature and the population inversion both below and above the laser threshold of THz quantum cascade lasers are extracted by the analysis of interband /spl mu/-probe photoluminescence spectra.
Precise sub-pixel estimation on area-based matching (2002)

Area-based matching is a common procedure in various fields such as image-based measurements, stereo image processing, and fluidics. Sub-pixel estimation using parabola fitting over three points with their similarity measures is also a common method to increase the resolution of matching. However, few investigations or studies concerning the characteristics of this estimation have been reported. In this paper we have analyzed the sub-pixel estimation error by using an approximate image function and three kinds of similarity measures for matching. The results illustrate some inherently problematic phenomena such as so called "pixel-locking". In addition to this, we propose a new algorithm to greatly reduce sub-pixel estimation error. This method is independent from the similarity measure and quite simple to implement. The advantage of our novel method is confirmed through experiments using three different types of images.
Applications of piezoelectric actuators to precise and fast positioning tasks (2001)

Several classes of low-voltage Piezo Actuators have been developed by Cedrat Technologies in order to cover needs for Precise and/or Fast Positioning. This paper discusses of the ability for these Actuators to meet these needs and illustrates it with various applications (mechanisms, dampers, valves) in instrumentation, space, aircraft and automotive industries.
High‐Toughness Silicon Carbide as Armor (2005)

Silicon carbide, with single‐edge precracked beam (SEPB) toughness greater than 7 MPa·m 1/2 , was made by hot‐pressing using Al–B–C (ABC) or Al–Y 2 O 3 (YAG) as additives. The hardness of SiC processed with a liquid phase was always less than SiC densified without a liquid phase despite having a similar or finer grain size. With increasing Al content, the ABC system changed from trans‐ to intergranular fracture with a drop in hardness and a two‐ to threefold increase in SEPB toughness. Strength and Weibull modulus for materials processed with a liquid phase were higher than those of solid‐state densified SiC. Ballistic testing, however, did not show any improvement over SiC densified with B and C additives. Depth of penetration was controlled by hardness of the SiC‐based materials, while V 50 values for 14.5 mm WC–Co cored projectiles were in the range of 720–750 m/s for all materials tested.
Perceptual optimization of DCT color quantization matrices (2002)

The JPEG baseline standard for image compression employs a block discrete cosine transform (DCT) and uniform quantization. For a monochrome image, a single quantization matrix is allowed, while for a color image, distinct matrices are allowed for each color channel. We describe a method, called DCTune, for the design of color quantization matrices that is based on a model of the visibility of quantization artifacts. The model describes the artifact visibility as a function of DCT frequency, color channel, and display resolution and brightness. The model also describes the summation of artifacts over space and frequency, and masking of artifacts by the image itself. The DCTune matrices are different from the de facto JPEG matrices, and appear to provide superior visual quality at equal bit-rates.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Sequence of raccoon IAPP supports importance of a specific structural motif in the development of pancreatic islet amyloidosis (1994)

The amino acid sequence of raccoon islet amyloid polypeptide (IAPP), as predicted by analysis of polymerase chain reaction (PCR)-amplified sequences from genomic DNA, contains the same putative amyloidogenic sequence (GAILS) at residues 24-28 as human and cat IAPP. These findings are consistent with evidence that the occurrence of islet amyloidosis, usually in association with age-associated (type 2) diabetes, is limited to a few unique species (e.g., humans, cats, raccoons) that produce IAPP molecules containing an inherent amyloidogenic structural motif. Although the presence of an intrinsic amyloidogenic structural motif within the IAPP molecule appears to be a prerequisite for the development of this form of amyloidosis, it is increasingly clear that additional factors are importantly involved in the ultimate expression of IAPP fibrillogenesis and deposition as islet amyloid deposits.
High Data-Rate Phase-Change Media for the Digital Video Recording System (2000)

The digital video recording (DVR) system combines a high numerical aperture ( NA =0.85) with a thin cover layer to achieve higher storage capacities in optical recording. In addition to capacity, the data-rate is a key parameter for DVR and a major challenge in research on phase-change materials. Using Ge 2 Sb 2 Te 5 as the phase-change material, we demonstrate recording using a red laser diode (λ=650 nm) at a user data-rate of 33 Mbps and a capacity of 9.2 GB for a single layer disc of 12 cm diameter, i.e. completely satisfying all the DVR system requirements. In addition, we achieved data-rates of up to 50 Mbps by applying a different stack design. Furthermore, we extend DVR to the blue-violet wavelength region. Using a GaN laser diode (λ=400 nm) in our recording set up, a capacity of 21.5 GB was achieved at a data-rate of 28 Mbps.
Activity Recognition with Time-Delay Emobeddings (2011)

We outline an approach that uses time-delay embedding models and machine learning in order to recognize physical activities, based on data coming from cell phone accelerometers.  The approach is very robust, cheap in terms of the amount of data and computation required, and easy to deploy.
Nb/sub 3/Al conductor fabricated by DRHQ (Double Rapidly-Heating/Quenching) process (2001)

For Nb/sub 3/Al compound, extremely high temperatures are required to obtain the stoichiometric A15 phase, so that the rapidly-heating/quenching process has been developed. In the process the Nb/Al composite filaments change into Nb-Al supersaturated bcc solid solution filaments with rapid-heating/quenching. The Nb-Al solid solutions are transformed into A15 phases with post-annealing at 800/spl deg/C, resulting in a 2-5 times higher J/sub c/(4.2 K) than those of commercial (Nb,Ti)/sub 3/Sn wires. However, the best values of T/sub c/=17.8 K and H/sub c2/=26 T are rather lower than those of stoichiometric Nb/sub 3/Al, which is due to its off-stoichiometry. Therefore, we tried a 2nd rapid-heating/quenching to the 1st rapidly-heated/quenched wires having Nb-Al solid solution filaments. The phase transformation was performed with the 2nd rapid-heating/quenching, which is a very-short high-temperature (about 1900/spl deg/C) heat treatment to obtain near-stoichiometric Nb/sub 3/Al. Without any additional elements, the Nb/sub 3/Al compounds synthesized by the DRHQ (Double Rapid Heating/Quenching) process show T/sub c/ and H/sub c2/(4.2 K) of about 18.4 K and 30 T, respectively. The most interesting result is its excellent J,(4.2 K)-B performance, e.g., 2nd A/mm/sup 2/ at 25 T, 270 A/mm/sup 2/ at 24 T and 330 A/mm/sup 2/ at 23 T.
Efficient reactive monitoring (2002)

Networks are monitored in order to ensure that the system operates within desirable parameters. The increasing complexity of networks and services provided by them increases this need for monitoring. Monitoring consists of measuring properties of the network, and of inferring an aggregate predicate from these measurements. Conducting such monitoring introduces traffic overhead that may reduce the overall effective throughput. This paper studies ways to minimize the monitoring communication overhead in IP networks. We develop and analyze several monitoring algorithms that achieve significant reduction in the management overhead while maintaining the functionality. The main idea is to combine global polling with local event driven reporting. The amount of traffic saving depends on the statistical characterization of the monitored data. We indicate the specific statistical factors that affect the saving and show how to choose the right algorithm for the type, of monitored data. In particular, our results show that for Internet traffic our algorithms can save more than 90% of the monitoring traffic.
<title>Coaxial hybrid iron (CHI) wiggler</title> (1993)

A magnetic wiggler design has been developed for applications in free-electron lasers which is scalable to small periods with high field amplitude, high beam current acceptance, and excellent transverse focusing and beam propagation properties. The Coaxial Hybrid Iron (CHI) wiggler design consists of a coaxial arrangement of alternating ferromagnetic and non- ferromagnetic rings with the central portion of the coax shifted by one half period. The entire arrangement is immersed in a solenoidal field which results in a cylindrically symmetric periodic field. A key advantage of this wiggler configuration is its capacity to handle very high beam currents with excellent focusing and transport properties. FEL configuration using the CHI wiggler design have the potential for high power, high frequency coherent generation in relatively compact systems. Analytic and simulated characteristics of the CHI wiggler are presented.
Mode-locked Thulium-doped fiber laser with carbon nanotube saturable absorber (2009)

We report mode-locking of an all-fiber thulium/holmium (Tm/Ho) co-doped laser with a saturable absorber based on a fiber taper embedded in carbon nanotube/polymer composite (FTCNTPC). 750fs soliton pulses are generated at wavelength around 1890nm.
Patterning by Photochemically Directing the Marangoni Effect (2012)

Polystyrene (PS) that has been exposed to ultraviolet light (UV) undergoes partial dehydrogenation of the alkane polymer backbone which increases its surface energy. Exploiting this photochemistry, we exposed polystyrene films to UV light using a photomask to induce a patterned photochemical reaction producing regions in the film with differing surface energy. Upon heating the solid polymer film with the preprogrammed surface energy pattern to a liquid state, the polymer flows from the low surface energy unexposed regions to high surface energy exposed regions. This flow creates three-dimensional topography by the Marangoni Effect, which describes convective mass transfer due to surface energy gradients. The topographical features can be permanently preserved by quenching the film below its glass to liquid transition temperature. Their shape and organization are only limited by the pattern on the photomask.
NoDB (2012)

As data collections become larger and larger, data loading evolves to a major bottleneck. Many applications already avoid using database systems, e.g., scientific data analysis and social networks, due to the complexity and the increased data-to-query time. For such applications data collections keep growing fast, even on a daily basis, and we are already in the era of data deluge where we have much more data than what we can move, store, let alone analyze.
Meta‐Selective C−H Arylation of Aromatic Alcohols with a Readily Attachable and Cleavable Molecular Scaffold (2017)

The first example of meta-selective C-H arylations of arene alcohol-based substrates is described. The strategy involves the combination of the transient norbornene strategy with the quinoline-based acetal scaffold to achieve the formation of biaryl compounds. Both a two-step meta-arylation/scaffold cleavage process and a total telescoping procedure are described, highlighting the convenient attributes of attachment, removal, and recovery of the acetal scaffold. Moreover, the meta-arylated compounds can be further derivatized via ortho-selective functionalizations. These processes establish a foundation for catalytic polyfunctionalization of alcohol-based compounds.
Pathogenicity and Immunogenicity of a<i>Listeria monocytogenes</i>Strain That Requires<scp>d</scp>-Alanine for Growth (1998)

Listeria monocytogenes is an intracellular bacterial pathogen that elicits a strong cellular immune response following infection and therefore has potential use as a vaccine vector. However, while infections by L. monocytogenes are fairly rare and can readily be controlled by a number of antibiotics, the organism can nevertheless cause meningitis and death, particularly in immunocompromised or pregnant patients. We therefore have endeavored to isolate a highly attenuated strain of this organism for use as a vaccine vector. D-Alanine is required for the synthesis of the mucopeptide component of the cell walls of virtually all bacteria and is found almost exclusively in the microbial world. We have found in L. monocytogenes two genes that control the synthesis of this compound, an alanine racemase gene (dal) and a D-amino acid aminotransferase gene (dat). By inactivating both genes, we produced an organism that could be grown in the laboratory when supplemented with D-alanine but was unable to grow outside the laboratory, particularly in the cytoplasm of eukaryotic host cells, the natural habitat of this organism during infection. In mice, the double-mutant strain was completely attenuated. Nevertheless, it showed the ability, particularly under conditions of transient suppression of the mutant phenotype, to induce cytotoxic T-lymphocyte responses and to generate protective immunity against lethal challenge by wild-type L. monocytogenes equivalent to that induced by the wild-type organism.
A hierarchical position-prediction algorithm for efficient management of resources in cellular networks (2002)

We propose a novel hierarchical position-prediction algorithm which improves the connection reliability and overall system performance by accurately predicting the future movement pattern of the mobile user. Our algorithm adopts a two-level approach-at the top (global) level, approximate pattern matching is applied to determine the mobile's overall inter-cell movement direction, and at the bottom (local) level, an optimum self-learning Kalman estimator is applied that uses real-time signal strength measurements to estimate the mobile's intra-cell movement direction and velocity. Simulation results show that this two-tier prediction algorithm promises to provide a high degree of prediction accuracy as it is robust in the presence of random movement patterns and noise corrupted measurement data.
Effect of synthesis conditions on the growth of ZnO nanorods via hydrothermal method (2008)

ZnO nanorods with hexagonal structures were synthesized by a hydrothermal method under different conditions. The effect of synthesis conditions on ZnO nanorod growth was systematically studied by scanning electron microscopy. All samples were characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy and micro-Raman spectroscopy. The results demonstrate that the morphology and ordering of ZnO nanorods are determined by the growth temperature, the overall concentration of the precursors and deposition time. ZnO nanorod morphology and surface-to-volume ratio are most sensitive to temperature. The width of ZnO nanorods can be controlled by the overall concentration of the reactants and by temperature. The influence of the chemical reactions, the nucleation and growth process on the morphology of ZnO nanorods is discussed.
Automatic physical design tuning (2006)

The area of automatic selection of physical database design to optimize the performance of a relational database system based on a workload of SQL queries and updates has gained prominence in recent years. Major database vendors have released automated physical database design tools with the goal of reducing the total cost of ownership. An important assumption underlying these tools is that the workload is a set of SQL statements. In this paper, we show that being able to treat the workload as a sequence, i.e., exploiting the ordering of statements can significantly broaden the usage of such tools. We present scenarios where exploiting sequence information in the workload is crucial for performance tuning. We also propose techniques for addressing the technical challenges arising from treating the workload as a sequence. We evaluate the effectiveness of our techniques through experiments on Microsoft SQL Server.
Effects of observation of robot–robot communication on human–robot communication (2004)

Abstract This paper proposes a human–robot communication system based on observations of robot–robot conversations to encourage humans to consider robots as natural targets for communication. In the proposed system, when nearby robots are communicating, voices and gestures are used to indicate that the robots are conversing with each other. When humans in the vicinity observe a robot building a relationship by interacting with another robot or the surrounding environment, they regard robots as equal targets for communication and build relationships with robots or carry out natural communications with robots. We used robots with sufficient body expression capabilities to actually implement a robot system that enabled communications according to robot–robot conversations or situations. This paper reports on a robot system that implements both of these kinds of robot–robot conversations and human–robot conversations and verifies the effects of the observation of robot–robot conversations through psychological experiments. © 2004 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 87(5): 48–58, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecjc.10171
250mV–950mV 1.1Tbps/W double-affine mapped Sbox based composite-field SMS4 encrypt/decrypt accelerator in 14nm tri-gate CMOS (2016)

A 10K-gate 4Gbps unified encrypt/decrypt SMS4 Chinese cryptographic accelerator is fabricated in 14nm tri-gate CMOS, operating at 1GHz, 750mV, 25°C with total power consumption of 12mW. Double-affine mapped Sbox circuits enable inverse computation using GF(2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> ) <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> data-path, resulting in 33% reduction in accelerator area by elimination of look-up tables (LUT). Optimal composite-field reduction polynomials, counter-assisted round constant generation circuits, and a hybrid data-path with in-line key-expansion provide additional 14% area saving over traditional designs resulting in a compact layout occupying 2445μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . Low voltage optimizations enable robust sub-threshold operation down to 250mV, with peak energy-efficiency of 1.1Tbps/W measured at 330mV.
Mammalian Selenoprotein in Which Selenocysteine (Sec) Incorporation Is Supported by a New Form of Sec Insertion Sequence Element (2002)

Selenocysteine (Sec), the 21st amino acid in protein, is encoded by UGA. The Sec insertion sequence (SECIS) element, which is the stem-loop structure present in 3' untranslated regions (UTRs) of eukaryotic selenoprotein-encoding genes, is essential for recognition of UGA as a codon for Sec rather than as a stop signal. We now report the identification of a new eukaryotic selenoprotein, designated selenoprotein M (SelM). The 3-kb human SelM-encoding gene has five exons and is located on chromosome 22 but has not been correctly identified by either Celera or the public Human Genome Project. We characterized human and mouse SelM cDNA sequences and expressed the selenoprotein in various mammalian cell lines. The 3" UTR of the human, mouse, and rat SelM-encoding genes lacks a canonical SECIS element. Instead, Sec is incorporated in response to a conserved mRNA structure, in which cytidines are present in place of the adenosines previously considered invariant. Substitution of adenosines for cytidines did not alter Sec incorporation; however, other mutant structures did not support selenoprotein synthesis, demonstrating that this new form of SECIS element is functional. SelM is expressed in a variety of tissues, with increased levels in the brain. It is localized to the perinuclear structures, and its N-terminal signal peptide is necessary for protein translocation.