gebhart/patrepeval huggingface dataset:
An Effective Channel Utilization Scheme for IEEE 1609.4 Protocol (2009)

In this paper, the effective channel usage is investigated in IEEE 802.11p WAVE (wireless access in vehicular environments) communication protocol. IEEE PI609 family is the standard for wireless access in vehicular environments based on IEEE 802.11p, and the WAVE architecture with multi-channel operation over CCH (control channel) and SCH (service channel) are defined in the MAC layer. However, there is only one channel (CCH or SCH) that is used to transmit data and the other one will be wasted during service access. Thus, an exploitable node-assisted WBSS (WAVE basic service set) broadcasting mechanism is proposed to utilize empty channels and idle nodes for transmitting WBSS to newly coming nodes. The proposed mechanism can reduce the delay time for getting service information from RSU when vehicles are traveling into the broadcasting coverage of RSU. The sync interval is fixed in the original scheme for guarantee OBU getting WBSS in a specific period. But, this feature may cause bandwidth wastage during service access. Therefore, a dynamic sync interval scheme is proposed to improve the channel usage. In this paper, we exhibit merits and performance results of our proposed schemes.
Recombinant Human Liver Betaine-homocysteine <i>S</i>-Methyltransferase:  Identification of Three Cysteine Residues Critical for Zinc Binding (1999)

Betaine-homocysteine S-methyltransferase (BHMT; EC 2.1.1.5) catalyzes the transfer of an N-methyl group from betaine to homocysteine to produce dimethylglycine and methionine, respectively. The enzyme is found in the pathway of choline oxidation and is abundantly expressed in liver and kidney. We have recently shown that human BHMT is a zinc metalloenzyme [Millian, N. S., and Garrow, T. A. (1998) Arch. Biochem. Biophys. 356, 93-98]. To facilitate the rapid purification of human BHMT for further physical and mechanistic studies, including characterizing its metal binding properties, we have overexpressed the enzyme in E. coli as a fusion construct which facilitated its subsequent purification by a self-cleavable affinity tag system (IMPACT T7). Using this expression and purification system in conjunction with site-directed mutagenesis, we have identified Cys217, Cys299, and Cys300 as zinc ligands. Mutating any of these Cys residues to Ala results in the complete loss of activity and a significant reduction in the ability of the protein to bind zinc. Comparing the regions of BHMT amino acid sequence surrounding these Cys residues with similar amino acid sequences retrievable from protein databases, we have identified the following motif: G[ILV]NCX(20,100)[ALV]X(2)[ILV]GGCCX(3)PX(2)I, which we propose to be a signature for a family of zinc-dependent methyltransferases that utilize thiols or selenols as methyl acceptors. Some of the members of this family include the vitamin B(12)-dependent methionine synthases, E. coli S-methylmethionine-S-homocysteine methyltransferase, and A. bisulcatus S-methylmethionine-selenocysteine methyltransferase.
Synthesis and Fabrication of Multifunctional Nanocomposites: Stable Dispersions of Nanoparticles Tethered with Short, Dense and Polydisperse Polymer Brushes in Poly(methyl methacrylate) (2012)

Abstract This paper presents a melt‐processable multifunctional nanocomposite material that shows highly controlled tunability in refractive index, glass transition temperature ( T g ) and energy bandgap. ZnO quantum dots tethered with polymer brushes are melt‐blended into the matrix polymer, giving rise to multiple functionalities in the nanocomposites. Brush–matrix polymer interactions are important in determining the ability of polymer‐grafted nanoparticles to disperse in a polymer melt, of which graft density ( σ ), brush ( N ) and matrix ( P ) polymer lengths are the critical parameters. It is generally assumed that long polymer brushes ( N > P ) and an optimum graft density are necessary to achieve a good dispersion. Here it is demonstrated that nanoparticles tethered with short, dense and polydisperse polymer brushes via radical copolymerization can exhibit a stable, fine dispersion in the polymer melt. The quality of the dispersion of the nanoparticles is characterized by measuring physical properties that are sensitive to the state of the dispersion. This synthesis method presents a general approach for the inexpensive and high‐throughput fabrication of high quality, melt‐blendable nanocomposites that incorporate functional nanoparticles, paving the way for wider application of high performance nanocomposites.
A new Genetic Algorithm for minimum span frequency assignment using permutation and clique (2000)

We propose a new Genetic Algorithm (GA) for solving the minimum span frequency assignment problem (MSFAP). The MSFAP is minimizing the range of the frequencies assigned to each transmitter in a region satisfying a number of constraints. The proposed method involves find-ing and ordering of the transmitters for use in a greedy (sequential) assignment process, and it also utilizes graph theoretic constraint to reduce search space. Results are given which show that our GA produces optimal solutions to several practical problems, and the performance of our GA is far better than the existing GAs. 1
Medical Images Edge Detection Based on Mathematical Morphology (2005)

Medical images edge detection is an important work for object recognition of the human organs and it is an important pre-processing step in medical image segmentation and 3D reconstruction. Conventionally, edge is detected according to some early brought forward algorithms such as gradient-based algorithm and template-based algorithm, but they are not so good for noise medical image edge detection. In this paper, basic mathematical morphological theory and operations are introduced at first, and then a novel mathematical morphological edge detection algorithm is proposed to detect the edge of lungs CT image with salt-and-pepper noise. The experimental results show that the proposed algorithm is more efficient for medical image denoising and edge detection than the usually used template-based edge detection algorithms and general morphological edge detection algorithms.
Short and long-term effects of rTMS treatment on Alzheimer's disease at different stages:A pilot study (2015)

DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely available online for everyone.
Shuttle mutagenesis of Neisseria gonorrhoeae: pilin null mutations lower DNA transformation competence (1990)

The method of shuttle mutagenesis has been extended to Neisseria gonorrhoeae. We have constructed a defective mini-Tn3 derivative that encodes chloramphenicol resistance in both N. gonorrhoeae and Escherichia coli and selected for mutations in the chloramphenicol resistance gene that express higher levels of antibiotic resistance in N. gonorrhoeae. Isogenic N. gonorrhoeae strains that differ only in pilin expression were constructed and used to test the effect of pilin null mutations on DNA transformation competence.
Application Modernization at LLNL and the Sierra Center of Excellence (2017)

In 2014, Lawrence Livermore National Laboratory began acquisition of Sierra, a pre-exascale system from IBM and Nvidia. It marks a significant shift in direction for LLNL by introducing the concept of heterogeneous computing via GPUs. LLNL's mission requires application teams to prepare for this paradigm shift. Thus, the Sierra procurement required a proposed Center of Excellence that would align the expertise of the chosen vendors with laboratory personnel that represent the application developers, system software, and tool providers in a concentrated effort to prepare the laboratory's codes in advance of the system transitioning to production in 2018. This article presents LLNL's overall application strategy, with a focus on how LLNL is collaborating with IBM and Nvidia to ensure a successful transition of its mission-oriented applications into the exascale era.
Predicting Future User Actions by Observing Unmodified Applications (2000)

Intelligent user interfaces often rely on modified applications and detailed application models. Such modifications and models are expensive to build and maintain. We propose to automatically model the use of unmodified applications to solve this problem. We observe a user&apos;s interactions with the application&apos;s interface and from these observations infer a state space which the user navigates and the stochastic policy he or she follows. ONISI, the algorithm presented here, builds this state space implicitly and on-line, and uses it to predict future user actions. Trials with real users show that this algorithm predicts the next user action significantly better than another current algorithm. Content Areas: plan recognition, human computer interaction, automated modeling, software agents
Determination of Human Papillomavirus Type by In Situ Hybridization Analysis: A Comparative Study with Southern Blot Hybridization and Polymerase Chain Reaction (1992)

(1992). Determination of Human Papillomavirus Type by In Situ Hybridization Analysis: A Comparative Study with Southern Blot Hybridization and Polymerase Chain Reaction. Journal of Histotechnology: Vol. 15, No. 2, pp. 99-104.
Reversed-phase high pressure liquid chromatography of globin chains: its application for the prenatal diagnosis of beta-thalassemia. (1981)

The separation of alpha, beta, G gamma and A gamma globin chains by reversed phase high pressure liquid chromatography has been studied using columns of octadecylsilyl-silica. All separations were performed in solvent mixtures of water and acetonitrile acidified with phosphoric acid or the hydrophobic ionpairing reagent trifluoroacetic acid. The addition of trifluoroacetic acid or the chaotropic agent NaClO4 to the mobile phase increased the resolution and the peak sharpness of the eluted globin chains. The use of decreasing gradients of TFA or NaClO4 and chromatography at 40 degree were useful steps for the separation of alpha and beta globin chains, a prerequisite for the successful application of this method for the prenatal diagnosis of beta-thalassemia. The beta/gamma synthetic ratio obtained from blood samples taken by fetoscopy from normal fetuses and fetuses with beta-thalassemia trait were measured simultaneously by CM-cellulose chromatography and high pressure liquid chromatography. The values obtained by HPLC were very similar but slightly lower than those obtained by CM-cellulose chromatography. The new method is fast and accurate and will prove to be useful for prenatal diagnosis involving globin chain separation.
Vacuum Pressures during Autologous Fat Transfer (AFT): A Study of the Closed Syringe Type and other Aspirator Pressures (2009)

Objective: Vacuum pressures have long been thought to damage the lipocytes during harvest. Several studies have described this as well as the need to reduce the pressure during harvest. The goals of this article are to increase awareness of the pressures associated with the closed syringe technique and other methods of harvesting for autologous fat transfer (AFT). Methods: The closed syringe pressures are presented for 60-, 30-, and 10-mL syringes. Note that the vacuum force for any manual syringe is the plunger and the position of the plunger will dictate the pressure that will be applied to the fat. Results: The closed syringe tests on 60-, 30-, and 10-mL syringes (three brands) show that a 60-mL syringe will produce an 18.5-in mercury vacuum pressure, but only when the plunger is withdrawn to maximum. The tests also showed that when the plunger is at 30 mL, the response is 16 in of mercury; at 10 mL the response is 6 in of mercury. Thus, the smaller the syringe capacity, the lower the vacuum pressure. This lessening of the vacuum pressure is not due to the plunger losing pressure around its gasket, but it is directly related to the empty space (volume) left in the syringe. Thus, a 60-mL syringe that is half full of fat renders an identical pressure to an empty 30-mL syringe, that being 16 in of mercury. Discussion: Electrically powered vacuum sources do not respond in this manner because the motor will maintain a relatively constant pressure throughout the procedure. The economic advantages of the closed syringe technique are discussed with emphasis on the availability of generic materials and thus lessened cost. The disadvantages include the varying downward pressures during harvest, the added time to decant or centrifuge the harvested material, and the need for added transfers. Also presented are the 2 filter-type harvest units on the market today (Lipivage and TissuTrans) that will save considerable time by separating out the unwanted material during the harvest and without additional transfers. Conclusion: Knowing the pressures administered (to fat) by the syringes or reservoirs used in all types of fat harvesting equipment is important and part of the standardization process.
Reliability Measures of a Three-State Complex System: A Copula Approach (2010)

Improvement in reliability and production play a very important role in system design. The two key factors, considered in predicting system reliability, are failure distribution of the component and system configuration. This research discusses the mathematical modeling of a highly reliable complex system, which is in three states i.e. normal, partial failed (degraded state) and complete failed state. The system, partial failed is due to the partial failure of internal components or redundancies and completely failed is due to catastrophic failure of the system. Repair rates are general functions of the time spent. All the transition rates are constant except for one transition where two types of repair namely exponential and general possible are tackled with the help of Gumbel-Hougaard family of copula. By employing the supplementary variable technique, Laplace transformation, various transition state probabilities, availability and cost analysis (predictable profit) are obtained along with steady-state behavior of the system. Inversions have also been carried out so as to obtain time dependent probabilities, which find out availability of the system at any instant. At last some special cases of the system have been taken.
Space charge conduction: Simple analytical solutions for ionic and mixed conductors and application to nanocrystalline ceria (2003)

In this paper we present a set of simple analytical solutions for the parallel and the serial contributions of space charge zones to the overall conduction in bicrystals and (brick layered) ceramics for a variety of situations. The different situations are characterized by signs of the space charge potential, by different charge numbers of the carriers and by the presence or absence of acceptor or donor dopants. We can give solutions for arbitrary charge numbers as long as we restrict to sufficiently high space charge potentials and can presuppose equilibrium for the mobile carriers. A recent analysis of impedance measurements of nanocrystalline ceria based on a space charge model is briefly mentioned as a specific example, as it reflects the occurrence of highly n-conducting accumulation layers in addition to strongly blocking oxygen vacancy depletion layers.
Nonspecific Phosphodiesterase Inhibition Attenuates Liver Injury in Acute Endotoxemia (2005)

Pentoxifylline downregulates the inflammatory response significantly and decreases liver injury in acute endotoxemia.
Industrial evaluation of DRAM tests (1999)

This paper presents the results of 44 well known memory tests applied to 1896 1M*4 DRAM chips, using up to 96 different stress combinations with each test. The results show the importance of selecting the right stress combination, and that the theoretically better tests (i.e. those covering more different functional faults) also have a higher fault coverage. However, the currently used fault models still leave much to be explained; e.g., the used data backgrounds and address orders show an unexplainable large variation in fault coverage. 1. Contact check: Verifies DUT-memory tester contact 2. Input leakage current high (INP LKH): Verifies I I(L)-max 3. Input leakage current low (INP LKL): Verifies I I(L)-min 4. Output leakage current high (OUT LKH): Verifies I O(L)-max 5. Output leakage current low (OUT LKL): Verifies I O(L)-min 6. Operating current (ICC1): Verifies ICC1 7. Standby current (ICC2): Verifies ICC2 8. Refresh current (ICC3): Verifies ICC3 9. Data retention (4n + 6ts) [Note: ts is the settling time = 5ms; Del = 1.2 * tREF ]: { (wcheckerb);Vcc Vccmin; Del; Vcc Vcc-typ; (rcheckerb)}. Repeat test for data-complement 10. Volatility (6n + 6ts): { (wcheckerb);Vcc Vcc-min; (rcheckerb); Vcc Vcc-typ; (rcheckerb)}. Repeat test for data-complement 11. Vcc R/W (8n + 6ts): {Vcc Vcc-max; (wd); Vcc Vcc-min; (rd); (wd); Vcc Vcc-max; (rd)}. Repeat for d = d * 2. March tests. March tests are very popular tests for functional faults such as address decoder faults, coupling faults, etc [5]. The notation used for these tests is as follows: denotes an increasing address order, denotes a decreasing address order, while denotes that the to be used address order can be chosen arbitrarily to be or . Some tests occur in different versions, such as March Cand March C -R, because, for experimentation purposes, extra read operations have been added to the march elements. 'D' denotes the delay time for DRFs. 12. Scan (4n): { (w0); (r0); (w1); (r1)} 13. Mats+ (5n): { (w0); (r0, w1); (r1, w0)} 14. Mats++ (6n): { (w0); (r0, w1); (r1, w0, r0)} 15. March A (15n): { (w0); (r0, w1, w0, w1); (r1, w0, w1); (r1, w0, w1, w0); (r0, w1, w0)} 16. March B (17n): { (w0); (r0, w1, r1, w0, r0, w1); (r1, w0, w1); (r1, w0, w1, w0); (r0, w1, w0)} 17. March C-(10n): { (w0); (r0, w1); (r1, w0); (r0, w1); (r1, w0); (r0)} 18. March C-R (15n): { (w0); (r0, r0, w1); (r1, r1, w0); (r0, r0, w1); (r1, r1, w0); (r0, r0)} 19. PMOVI (13n): { (w0); (r0, w1, r1); (r1, w0, r0); (r0, w1, r1); (r1, w0, r0)} 20. PMOVI-R (17n): { (w0); (r0, w1, r1, r1); (r1, w0, r0, r0); (r0, w1, r1, r1); (r1, w0, r0, r0)} 21. March G (23n + 2D): { (w0); (r0, w1, r1, w0, r0, w1); (r1, w0, w1); (r1, w0, w1, w0); (r0, w1, w0); D; (r0, w1, r1); D; (r1, w0, r0)} 22. March U (13n): { (w0); (r0, w1, r1, w0); (r0, w1); (r1, w0, r0, w1); (r1, w0)} 23. March UD (13n + 2D): { (w0); (r0, w1, r1, w0); D; (r0, w1); D; (r1, w0, r0, w1); (r1, w0)} 24. March U-R (15n): { (w0); (r0, w1, r1, r1, w0);
Efficient histogramming of large-scale geospatial rasters in supporting of web-based queries (2011)

This demonstration paper reports our design and implementation of a Web-based system that supports efficient histogramming of large-scale geospatial rasters using either rectangular or arbitrarily shaped polygons interactively drawn by users at the client side. By combining two performance boosting techniques, namely materialized histograms and compressed tiles, experiments using 50 random Region of Interests (ROIs) show that our approach is several times faster than straightforwardly scanning all raster tiles that intersect with the ROIs.
Using Dynamic Programming For Minimizing The Energy Of Active Contours In The Presence Of Hard Constraints (2005)

Energy-Minimizing Active Contour Models (snakes) have recently been proposed by Kass et al. [8] as a top-down mechanism for locating features of interest in images. The Kass et al.’s algorithm involves four steps: setting up a variational integral on the continuous plane, deriving a pair of Euler equations, discretizing them, and solving the discrete equations iteratively until convergence. This algorithm suffers from a number of problems. We discuss these problems and present an algoIithm for active contours based on dynamic programming. The optimization problem is set up as a discrete multi-stage decision process and is solved by a “time-delayed” discrete dynamic programming algorithm. This formulation leads to a stable behavior for the active contours over iterations, in addition to allowing for hard constraints to be enforced on the behavior of the solution. Results of the application of the proposed algorithm to real images is presented.
Structure and function of a small RNA that selectively inhibits internal ribosome entry site-mediated translation (1999)

A 60 nt long RNA termed IRNA, isolated from the yeast Saccharomyces cerevesiae, was previously shown to selectively block internal ribosome entry site (IRES)-mediated translation without interfering with cap-dependent translation of cellular mRNAs both in vivo and in vitro. IRNA specifically bound cellular proteins believed to be important for IRES-mediated translation. We demonstrate here that a complementary copy of IRNA (cIRNA) is also active in blocking IRES-mediated translation and that it binds many of the same cellular proteins that IRNA does. We have probed the secondary structure of both IRNA and cIRNA using single-strand- and double-strand-specific nucleases as well as using oligonucleotide hybridization followed by RNase H digestion. Both IRNA and cIRNA share secondary structural homology, although distinct differences do exist between the two structures. Mutational analysis of IRNA shows that sequences that form both the main stem and one loop are critical for its translation inhibitory activity. Maintenance of the established secondary structure appears to be required for both IRNA's ability to bind cellular trans -acting proteins believed to be required for IRES-mediated translation and its ability to block IRES-mediated translation.
Estimation with random linear mixing, belief propagation and compressed sensing (2010)

We apply Guo and Wang's relaxed belief propagation (BP) method to the estimation of a random vector from linear measurements followed by a componentwise probabilistic measurement channel. The relaxed BP method is a Gaussian approximation of standard BP that offers significant computational savings for dense measurement matrices. The main contribution of this paper is to extend Guo and Wang's relaxed BP method and analysis to general (non-AWGN) output channels. Specifically, we present detailed equations for implementing relaxed BP for general channels and show that the relaxed BP has an identical asymptotic large sparse limit behavior as standard BP as predicted by the Guo and Wang's state evolution (SE) equations. Applications are presented to compressed sensing and estimation with bounded noise.
Kinetic analysis of sea urchin sperm guanylate cyclase (1974)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic analysis of sea urchin sperm guanylate cyclaseDavid L. Garbers, Joel G. Hardman, and Frederick B. RudolphCite this: Biochemistry 1974, 13, 20, 4166–4171Publication Date (Print):September 1, 1974Publication History Published online1 May 2002Published inissue 1 September 1974https://pubs.acs.org/doi/10.1021/bi00717a015https://doi.org/10.1021/bi00717a015research-articleACS PublicationsRequest reuse permissionsArticle Views42Altmetric-Citations42LEARN 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