gebhart/patrepeval huggingface dataset:
Coupled, multi-resolution stereo and motion analysis (2002)

We propose a novel approach for fusing multi-resolution stereo and motion (both rigid and non-rigid) analysis in order to complement each other's performance. A hierarchical frame-work is presented to couple motion correspondences and stereo correspondences in order to generate accurate disparity map and motion parameters. One scenario for such system is the analysis of time-varying multi-spectral observations of clouds from meteorological satellites. Our experiments involve such time-varying remote sensing stereo data sets, and the motion is typically non-rigid as the clouds undergo shape changes. Rigid motion matching may still be performed for initial fusion, and gradually raised to non-rigid motion matching as in a coarse-to-fine strategy. Both stereo disparities and motion correspondences are estimated using such multi-resolution coarse-to-fine strategy to a sub-pixel accuracy. Experimental results using time-varying data of visible channel from two satellites in geosynchronous orbit is presented for the Hurricane Frederic.
Facilitating Anion Transport in Polyolefin-Based Anion Exchange Membranes via Bulky Side Chains (2016)

Highly anion-conductive polymer electrolyte membranes with excellent alkaline stabilities for fuel cell applications were prepared. Thus, a series of polyolefin copolymers with poly(4-methyl-1-pentene) (PMP) moieties containing bulky side chains and side-chain quaternary ammonium (QA) groups were prepared through copolymerization with a Ziegler-Natta catalyst and subsequent quaternization. The separation of hydrophilic microphase and hydrophobic microphase was induced by PMP bulky side chains, and then well-connected ionic domains were formed. This result was confirmed by AFM (atomic force microscopy) and SAXS (small-angle X-ray scattering) analyses. It was discovered that well-defined ionic domains of the PMP-TMA-x (TMA, trimethylamine) membranes depended on the content of PMP moieties. The well-defined ionic domains enhanced the hydroxide conductivity of the PMP-TMA-x membranes despite their lower water uptake (WU) as compared to polypropylene (PP)-containing membranes (PP-TMA-x). The PMP-TMA-41 membrane showed the highest ionic conductivity value (43 mS/cm) while maintaining low WU (29.2 wt %) at room temperature. The membranes mostly preserved (>93.0%) their initial hydroxide conductivity after alkaline treatment (10 M aqueous NaOH, 80 °C, 700 h), thereby revealing desirable alkali stability characteristics. Presumably, the nucleophilic attack from hydroxide or water in the cationic center is inhibited by long alkyl spacers (-CH2-)n (n = 9) which are located between the cation groups and the polymer backbone.
Studies on the Effectiveness of Virtual Pointers in Collaborative Augmented Reality (2008)

A critical component of successful collaboration is the ability for participants to generate and interpret effective reference cues. In collaborative augmented reality (AR), participants must be able to refer to the physical and virtual artifacts that surround them, as well as those that exist in remote workspaces. One of the most primitive referencing techniques that satisfy these requirements is a virtual pointer. In order to better understand its effectiveness in collaborative augmented reality, a two-part study was conducted that independently examines how individuals both give and interpret references using this technique, as well as factors that influence accuracy. A second study was conducted that explored the dynamics of group interaction and how virtual referencing techniques may support collaborative tasks. We present the results of these two studies in the context of designing support for demonstrative referencing in collaborative augmented reality spaces. Overall, we argue that when the probability of referential ambiguity is high, additional costs such as time, computational resources or alternative techniques will help reduce referential ambiguity.
Crystal Structure and Optical Properties of Cd <sub>32</sub> S <sub>14</sub> (SC <sub>6</sub> H <sub>5</sub> ) <sub>36</sub> . DMF <sub>4</sub> , a Cluster with a 15 Angstrom CdS Core (1993)

Recrystallization of the solid Cd(10)S(4)(SC(6)H(5))(12) from a solution of pyridine and N, N-di-methylformamide (DMF) results in the formation of the cluster Cd(32)S(14)(SC(6)H(5))(36)-DMF(4) as pale yellow cubes. The structure consists of an 82-atom CdS core that is a roughly spherical piece of the cubic sphalerite lattice approximately 12 angstroms in diameter. The four corners of the lattice are capped by hexagonal wurtzite-like CdS units, which results in an overall tetrahedral cluster approximately 15 angstroms in diameter. This cluster dissolves intact in tetrahydrofuran where its absorption spectrum reveals a sharp peak at 358 nanometers at room temperature and its emission spectra show a strong broad band at 500 nanometers.
<i>SFCHECK</i>: a unified set of procedures for evaluating the quality of macromolecular structure-factor data and their agreement with the atomic model (1999)

In this paper we present SFCHECK, a stand-alone software package that features a unified set of procedures for evaluating the structure-factor data obtained from X-ray diffraction experiments and for assessing the agreement of the atomic coordinates with these data. The evaluation is performed completely automatically, and produces a concise PostScript pictorial output similar to that of PROCHECK [Laskowski, MacArthur, Moss & Thornton (1993). J. Appl. Cryst. 26, 283–291], greatly facilitating visual inspection of the results. The required inputs are the structure-factor amplitudes and the atomic coordinates. Having those, the program summarizes relevant information on the deposited structure factors and evaluates their quality using criteria such as data completeness, structure-factor uncertainty and the optical resolution computed from the Patterson origin peak. The dependence of various parameters on the nominal resolution (d spacing) is also given. To evaluate the global agreement of the atomic model with the experimental data, the program recomputes the R factor, the correlation coefficient between observed and calculated structure-factor amplitudes and Rfree (when appropriate). In addition, it gives several estimates of the average error in the atomic coordinates. The local agreement between the model and the electron-density map is evaluated on a per-residue basis, considering separately the macromolecule backbone and side-chain atoms, as well as solvent atoms and heterogroups. Among the criteria are the normalized average atomic displacement, the local density correlation coefficient and the polymer chain connectivity. The possibility of computing these criteria using the omit-map procedure is also provided. The described software should be a valuable tool in monitoring the refinement procedure and in assessing structures deposited in databases.
Piezoelectric microelectromechanical resonant sensors for chemical and biological detection (2011)

Piezoelectric microelectromechanical systems (MEMS) resonant sensors, known for their excellent mass resolution, have been studied for many applications, including DNA hybridization, protein-ligand interactions, and immunosensor development. They have also been explored for detecting antigens, organic gas, toxic ions, and explosives. Most piezoelectric MEMS resonant sensors are acoustic sensors (with specific coating layers) that enable selective and label-free detection of biological events in real time. These label-free technologies have recently garnered significant attention for their sensitive and quantitative multi-parameter analysis of biological systems. Since piezoelectric MEMS resonant sensors do more than transform analyte mass or thickness into an electrical signal (e.g., frequency and impedance), special attention must be paid to their potential beyond microweighing, such as measuring elastic and viscous properties, and several types of sensors currently under development operate at different resonant modes (i.e., thickness extensional mode, thickness shear mode, lateral extensional mode, flexural mode, etc.). In this review, we provide an overview of recent developments in micromachined resonant sensors and activities relating to biochemical interfaces for acoustic sensors.
Hydrogen sulfide regulates cAMP homeostasis and renin degranulation in As4.1 and rat renin-rich kidney cells (2011)

The present study aims to investigate the regulatory effect of hydrogen sulfide (H(2)S) on cAMP homeostasis and renin degranulation in As4.1 and rat renin-rich kidney cells. It was found in the present study that NaHS at 0.1-10 μM significantly decreased cAMP production in As4.1 cells treated with isoproterenol (a β-adrenoceptor agonist), forskolin (an adenylyl cyclase activator), or 3-isobutyl-1-methylxanthine (IBMX, a phosphodiesterase inhibitor). NaHS at 10 μM suppressed adenylate cyclase activity but stimulated phosphodiesterase activity. We continued to study whether H(2)S may mediate cAMP-dependent renin degranulaion in As4.1 cells. It was found that NaHS at 0.1-10 μM significantly increased intracellular renin protein level. Moreover, NaHS reversed the declined renin content within As4.1 cells and normalized the upregulated renin activity in the culture medium of As4.1 cells treated with the above three stimuli. RT-PCR showed that cystathionine-γ-lyase is the main enzyme to produce endogenous H(2)S in As4.1 cells. Overexpression of cystathionine-γ-lyase increased endogenous H(2)S production and suppressed isoproterenol-induced renin release, suggesting that endogenous H(2)S may also inhibit renin release from As4.1 cells. We also tested whether H(2)S has a similar effect in renin-rich kidney cells. It was found that isoproterenol elevated intracellular cAMP level and extracellular renin activity but decreased renin protein level in the renin-rich kidney cells. Pretreatment with NaHS abolished these effects. In conclusion, H(2)S regulates cAMP homeostasis via inhibition of adenylate cyclase and stimulation of phosphodiesterase. Our findings suggest that H(2)S plays a critical role in regulation of renin degranulation in As4.1 and rat renin-rich kidney cells.
Semi-Autoregressive Neural Machine Translation (2018)

Existing approaches to neural machine translation are typically autoregressive models. While these models attain state-of-the-art translation quality, they are suffering from low parallelizability and thus slow at decoding long sequences. In this paper, we propose a novel model for fast sequence generationthe semi-autoregressive Transformer (SAT). The SAT keeps the autoregressive property in global but relieves in local and thus are able to produce multiple successive words in parallel at each time step. Experiments conducted on English-German and Chinese-English translation tasks show that the SAT achieves a good balance between translation quality and decoding speed. On WMT'14 English-German translation, the SAT achieves 5.58 speedup while maintaining 88% translation quality, significantly better than the previous non-autoregressive methods. When produces two words at each time step, the SAT is almost lossless (only 1% degeneration in BLEU score).
Searchable Keyword-Based Encryption ⁄ (2005)

To solve the problem of searching on encrypted data, many keyword search schemes have been proposed in recent years. The goal of such schemes is to enable a user to give an untrusted storage server the ability only to test whether an encrypted document contains a few keywords without learning anything else about the document. In this paper, we are concerned with decrypting the searched results as well as searching for desired documents. In the previously proposed schemes, except for the work by Waters et al. [26], a user decrypts searched documents using his private key, Apriv , or a symmetric key. Our another goal is to enable a user to give a proxy the ability to decrypt only the ciphertexts containing desired keywords, but not other ciphertexts. We propose a new mechanism, Searchable Keyword-Based Encryption (SKBE) which satisfies both the above goals. As a result of adding the delegation of decryption ability, our mechanism works more securely and e#ciently in several applications, such as email gateways, secure audit logs, and decryption key delegation systems, than any of the previously proposed schemes. We formalize this mechanism, define its security model and propose an e#cient construction whose security is proved in a random oracle model under the Bilinear Di#e-Hellman Inversion assumption. The scheme is constructed based on the Public Key Encryption with Conjunctive Field Keyword Search scheme in [21] by using a hybrid encryption technique.
Silicon Cabide-Tungsten Heat Pipes for High-Temperature Service (1980)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon Cabide-Tungsten Heat Pipes for High-Temperature ServiceLynn B. LundbergCite this: Ind. Eng. Chem. Prod. Res. Dev. 1980, 19, 2, 241–244Publication Date (Print):June 1, 1980Publication History Published online1 May 2002Published inissue 1 June 1980https://pubs.acs.org/doi/10.1021/i360074a022https://doi.org/10.1021/i360074a022research-articleACS PublicationsRequest reuse permissionsArticle Views102Altmetric-Citations5LEARN 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 options Get e-Alerts
Optimal design of optical fibre-holding microclips with metamorphic development (2001)

Silicon- or silicon nitride-based microclips have recently been developed to hold optical fibres in micro-optical systems for high optical coupling efficiency. The fabrication process is simple, with one or two lithographic steps required on a thin film deposited on a silicon substrate. Single-mode optical fibres are inserted and held in position in V-shaped grooves etched in silicon substrates by the cantilever clips protruding from the edges of the V grooves. As the fibre core is, in general, either level with or above the silicon surface, the clips are deflected by the fibre and act as springs holding the fibres kinematically in place. Ideally, the mass and thickness of the film clips should be minimized. However, the design of the microclips is faced with apparent contradicting constraints: on the one hand, the clips need to be sufficiently flexible for fibre connections and disconnections; on the other hand, they need to be sufficiently stiff so that the clamping force exerted on the fibres is reliable. Additional problems that must be addressed in designing the clips include substrate spalling and interfacial debonding due to stress concentrations at the clip-substrate joint. In this work the optimal thickness, mass and shape of the fibre-holding clips are studied with an effective optimization procedure, called `metamorphic development' (MD). This procedure, coupled with the method of finite elements, aims at finding structural shapes and topologies of the microclips that minimize their structural compliance and weight, subject to stress and deflection constraints. It allows the clips to grow and degenerate from the simplest possible start-up geometry towards an optimum topological layout.
New therapeutic approaches to Alzheimer's disease. (1996)

Therapeutic approaches to treat the cognitive impairment in dementia and to treat slow decline are making their way into clinical practice. Cholinergic agents are currently the most promising treatment, and several cholinesterase inhibitors will soon be available for prescription. As physicians learn more about dosing, side effects, and mechanisms of action, they can prescribe these drugs more efficiently. Evidence suggests that certain patients with dementia may be particularly responsive to such intervention, and other medications may enhance response. Current experimental approaches to slowing the rate of cognitive decline include the use of antioxidants, monoamine oxidase-B inhibitors, cholinesterase inhibitors, and anti-inflammatory agents. Psychosocial interventions appear to help delay institutionalization. Drugs that improve cognition also may affect behavioral symptoms and severe dementia as well as non-Alzheimer dementia.
Natural and synthetic tetracycline-inducible promoters for use in the antibiotic-producing bacteria <i>Streptomyces</i> (2005)

Bacteria in the genus Streptomyces are major producers of antibiotics and other pharmacologically active compounds. Genetic and physiological manipulations of these bacteria are important for new drug discovery and production development. An essential part of any 'genetic toolkit' is the availability of regulatable promoters. We have adapted the tetracycline (Tc) repressor/operator (TetR/tetO) regulatable system from transposon Tn10 for use in Streptomyces. The synthetic Tc controllable promoter (tcp), tcp830, was active in a wide range of Streptomyces species, and varying levels of induction were observed after the addition of 1-100 ng/ml of anhydrotetracycline (aTc). Streptomyces coelicolor contained an innate Tc-controllable promoter regulated by a TetR homologue (SCO0253). Both natural and synthetic promoters were active and inducible throughout growth. Using the luxAB genes expressing luciferase as a reporter system, we showed that induction factors of up to 270 could be obtained for tcp830. The effect of inducers on the growth of S.coelicolor was determined; addition of aTc at concentrations where induction is optimal, i.e. 0.1-1 microg/ml, ranged from no effect on growth rate to a small increase in the lag period compared with cultures with no inducer.
3D PRM based real-time path planning for UAV in complex environment (2012)

This paper presents a real-time path planning algorithm for unmanned aerial vehicle (UAV) in complex 3D environments. In this study, the work space is represented by free voxels, which have enough space tolerance to satisfy the safety needs of the UVA. In order to obtain the connectivity of free voxels effectively, the environment is divided into bounding box array and the connectivity evaluation is carried out in each bounding box. A modified Probabilistic Roadmap Method (PRM) is introduced by random sampling in bounding box array to ensure a more evenly distribution of roadmap nodes in 3D space. Based on the voxel connectivity, the selected nodes compose a roadmap, which is applied for path searching by A* algorithm for feasible path. Experimental results show that the proposed path planning approach can significantly reduce the computation time than traditional PRM method.
Design and Fabrication of Aspheric Microlens Array for Optical Read-Only-Memory Card System (2006)

An optical head based on the Talbot effect with an aspheric microlens array for an optical read-only-memory (ROM) card system was designed and fabricated. The mathematical expression for the wavefield diffracted by a periodic microlens array showed that the amplitude distribution at the Talbot plane from the focal plane of the microlens array was identically equal to that at the focal plane. To use a reflow microlens array as a master pattern of an ultraviolet-imprinted (UV-imprinted) microlens array, the reflow microlens was defined as having an aspheric shape. To obtain optical probes with good optical qualities, a microlens array with the minimum spherical aberration was designed by ray tracing. The reflow condition was optimized to realize the master pattern of a microlens with a designed aspheric shape. The intensity distribution of the optical probes at the Talbot plane from the focal plane showed a diffraction-limited shape.
Subviral Dense Bodies of Human Cytomegalovirus Stimulate Maturation and Activation of Monocyte-Derived Immature Dendritic Cells (2013)

Dendritic cells play a central role in the immune control of human cytomegalovirus (HCMV) infection. This work aimed at investigating the impact of noninfectious, subviral dense bodies of HCMV on the maturation and activation of dendritic cells (DC). Treatment of immature DC with dense bodies led to the maturation of these cells and significantly increased their capacity for cytokine release and antigen presentation. Dense body-activated DC may thereby contribute to the development of antiviral immunity.
Terminal Area Required Time of Arrival (RTA) Concept of Operations and Automation Prototype (2008)

A ground-centric concept for merging and sequencing aircraft on Area Navigation (RNAV) and/or Required Navigation Performance (RNP) procedures in the terminal area leveraging the advanced flight deck capability of meeting required time of arrival (RTA) instructions is defined. Automation to provide time-based resolution advisories—RTAs, speed control, and lateral offsets (LOs)—to the controller to achieve efficient merging and sequencing is proposed. Closed-loop simulations using the proposed automation were conducted to assess the viability of the advisory heuristics and to examine coupling dependencies in multiple merge systems.
MEGA: A tool for Mac OS X operating system and application forensics (2008)

Computer forensic tools for Apple Mac hardware have traditionally focused on low-level file system details. Mac OS X and common applications on the Mac platform provide an abundance of information about the user's activities in configuration files, caches, and logs. We are developing MEGA, an extensible tool suite for the analysis of files on Mac OS X disk images. MEGA provides simple access to Spotlight metadata maintained by the operating system, yielding efficient file content search and exposing metadata such as digital camera make and model. It can also help investigators to assess FileVault encrypted home directories. MEGA support tools are under development to interpret files written by common Mac OS applications such as Safari, Mail, and iTunes.