WorldWideScience

Sample records for arbitrarily primed pcr

  1. Analysis of Methicillin-Resistant Staphylococcus aureus strains isolated in Palestine by arbitrarily primed PCR

    International Nuclear Information System (INIS)

    We report a study of 35 methicillin-resistant Staphylococcus aureus (MRSA) clinical isolates collected between February and May 1998 from 4 different hospitals in Northern and Southern Palestine. The isolates were recovered from infection and carriage sites of patients and hospital environmental samples. The arbitrarily primed PCR (AP-PCR) method with two primers appears to be a useful tool, provides a fast and simple method for genetic analysis of MRSA infections and allows us to differentiate 22 different AP-PCR patterns. The major cluster, however, sharing common AP-PCR as well as a common PFGE pattern, represented 34% of all MRSA isolates. Isolates of these clusters were spread throughout the neonatal and intensive care units of Rafidya hospital during the entire period. In addition, these isolates were distributed in the southern part of Palestine as well. (author)

  2. Arbitrarily primed PCR- A rapid and simple method for typing of leptospiral serovars

    Directory of Open Access Journals (Sweden)

    Ramadass P

    2002-01-01

    Full Text Available PURPOSE: To investigate the use of arbitrarily primed polymerase chain reaction (AP-PCR for typing of leptospiral serovars. METHODS: AP-PCR was adopted for identification of laboratory strains of leptospires and leptospiral cultures at serovar level. A primer of 12 bp was used for amplifying DNA of 13 laboratory strains of leptospires as well as culture pellets of leptospires. RESULTS: Each serovar produced distinct DNA fingerprint which was characteristic for each serovar. These patterns were used for typing of 81 serum culture samples obtained from human leptospiral cases. Of these samples, 39 could be typed based on AP-PCR fingerprints belonging to serovars autumnalis, pomona, canicola, javanica, icterohaemorrhagiae, patoc and pyrogenes. These results were confirmed by RAPD fingerprinting of the DNA samples of the respective leptospiral serovars after culturing -FNx01them in EMJH media. One of the important findings of this work was that straight culture sample could be used for AP-PCR assay, without purification of DNA. By having more number of AP-PCR reference fingerprints, more serovars could be typed. CONCLUSIONS: AP-PCR technique provides great potential for simple and rapid identification of leptospires at serovar level, which could be useful in molecular epidemiological studies of leptospirosis.

  3. Molecular Characterization of Epidemic Isolates of Vibrio Cholerae O1 by Arbitrarily Primed PCR (AP-PCR

    Directory of Open Access Journals (Sweden)

    M Izadi

    2008-07-01

    Full Text Available Background: Epidemic and endemic cholera is a major public health problem for many countries. Aim of this study was to evaluate AP-PCR for investigation of clonal relatedness among the strains of Vibrio cholerae recovered from an outbreak occurred in different parts of Iran in 2005. Methods: The study was conducted during the cholera outbreak occurred in some of provinces in Iran in summer 2005. Bacterial isolation and identification was carried out according to the standard bacteriological methods. Arbitrarily primed PCR (AP-PCR used to study the genetic relatedness between the V.cholerae isolates. Results: Thirty-nine isolates of V.cholerae O1 were identified. All isolates belonged to serotype Inaba. AP-PCR could differentiate the isolates into five groups. AP-PCR cluster types 1 and 2 were the most prevalent groups, accounting for 36% and 41%, respectively, of V.cholerae isolates. Conclusion: The most of epidemic strains of V.cholerae O1 isolated in the year 2005 could be attributed to two predominant clusters including AP-PCR cluster types 1 and 2 accounting for more than 77% of isolates. In conclusion, a few epidemic clones were responsible for the apparently epidemic occurrence of cholera in provinces studied.

  4. Randomly Amplified DNA Fingerprinting: A Culmination of DNA Marker Technologies Based on Arbitrarily-Primed PCR Amplification

    OpenAIRE

    Waldron Julie; Peace Cameron P.; Searle Iain R.; Furtado Agnelo; Wade Nick; Findlay Ian; Graham Michael W.; Carroll Bernard J.

    2002-01-01

    Arbitrarily-primed DNA markers can be very useful for genetic fingerprinting and for facilitating positional cloning of genes. This class of technologies is particularly important for less studied species, for which genome sequence information is generally not known. The technologies include Randomly Amplified Polymorphic DNA (RAPD), DNA Amplification Fingerprinting (DAF), and Amplified Fragment Length Polymorphism (AFLP). We have modified the DAF protocol to produce a robust PCR-based DNA ma...

  5. Case of recurrent Flavimonas oryzihabitans bacteremia associated with an implanted central venous catheter (Port-A-Cath): assessment of clonality by arbitrarily primed PCR.

    OpenAIRE

    Verhasselt, B; Claeys, G; Elaichouni, A; Verschraegen, G; Laureys, G; Vaneechoutte, M

    1995-01-01

    Flavimonas oryzihabitans bacteremias, which occurred immediately after the flushing or use of an implanted central venous catheter (Port-A-Cath) in two patients at the same pediatric ward, were studied by arbitrarily primed PCR. We conclude that the colonization of the Port-A-Cath with F. oryzihabitans described here lasted for several months.

  6. Rapid identification of pathogenic Leptospira species (Leptospira interrogans, L. borgpetersenii, and L. kirschneri) with species-specific DNA probes produced by arbitrarily primed PCR.

    OpenAIRE

    Letocart, M; Baranton, G; Perolat, P

    1997-01-01

    Arbitrarily primed PCR (AP-PCR) assays can be used to discriminate between species of Leptospira. Comparative analysis of the fingerprints obtained from representative sets of serovar reference strains of Leptospira interrogans sensu stricto, L. borgpetersenii, and L. kirschneri and the reference strains of the other Leptospira spp. revealed species-specific DNA fragments. These species-specific sequences were reamplified in order to produce digoxigenin-11-dUTP-labeled genomic DNA probes that...

  7. Chromosomal assignment of human DNA fingerprint sequences by simultaneous hybridization to arbitrarily primed PCR products from human/rodent monochromosome cell hybrids

    Energy Technology Data Exchange (ETDEWEB)

    Yasuda, Jun; Sekiya, Takao [National Cancer Center Research Institute, Chuo-ku, Tokyo (Japan); Navarro, J.M. [Burnham Institute, La Jolla, CA (United States)] [and others

    1996-05-15

    We have developed a technique for the simultaneous chromosomal assignment of multiple human DNA sequences from DNA fingerprints obtained by the arbitrarily primed polymerase chain reaction (AP-PCR). Radioactively labeled human AP-PCR products are hybridized to DNA fingerprints generated with the same arbitrary primer from human/rodent monochromosome cell hybrids after electroblotting to a nylong membrane. Human-specific hybridization bands in the human/rodent fingerprints unambiguously determine their chromosome of origin. We named this method simultaneous hybridization of arbitrarily primed PCR DNA fingerprinting products (SHARP). Using this approach, we determined the chromosomal origins of most major bands of human AP-PCR fingerprints obtained with two arbitrary primers. Altogether, the chromosomal localization of near 50 DNA fragments, comprehensive of all human chromosomes except chromosomes 21 and Y, was achieved in this simple manner. Chromosome assignment of fingerprint bands is essential for molecular karyotyping of cancer by AP-PCR DNA fingerprinting. The SHARP method provides a convenient and powerful tool for this purpose. 23 refs., 3 figs., 2 tabs.

  8. Assessment of Genotoxic Activity of Para-nitrophenol in Higher Plant Using Arbitrarily Primed- polymerase Chain Reaction (AP-PCR

    Directory of Open Access Journals (Sweden)

    Mohamed R. Enan

    2007-01-01

    Full Text Available Paranitrophenol is a common toxic environmental pollutant; the aim of this study was to evaluate the potential of the DNA fingerprinting by AP-PCR assay to detect the DNA damage in the common bean (Phaseolus vulgaris exposed to different concentrations of paranitrophenol (4.0-720 nM. The changes occurring in the fingerprint patterns were likely to be the result of paranitrophenol-induced DNA damage. These changes include variation in band loss and gain. Paranitrophenol was able to induce DNA damage in concentration-related manner with effectiveness at higher concentrations. A total of 488 bands were clearly identified and 39% markers were polymorphic. Genetic distance between control and exposed plant samples served to produce a dendrogram. The dendrogram comprised three main clusters, one of which including control and plant samples exposed to lower concentrations and the other two clusters included plants exposed to higher concentrations. This study clearly demonstrates that AP-PCR is highly useful for assessing DNA damage in plant exposed to chemicals. To the best of our knowledge, this is the first report of the applicability of paranitrophenol for inducing DNA damage in higher plants.

  9. Typing of Methicillin-Resistant Staphylococcus aureus by Ribosome Spacer and Arbitrarily Primed Polymerase Chain Reaction

    OpenAIRE

    Essawi, Tamer; Adwan, Kamel; ABU-HASSAN, Nael; ADWAN, Galeb; Saleh, Ahmed

    2004-01-01

    Thirty-five methicillin-resistant Staphylococcus aureus (MRSA) clinical isolates were collected from 3 hospitals in the northern and southern parts of Palestine between February and May 1998. These isolates were typed by ribosome spacer PCR (RS-PCR) and arbitrarily primed PCR (AP-PCR). RS-PCR generated 9 different genotypes. The use of AP-PCR provided a high resolution typing method and allowed us to define 11 different clusters. Three major clusters, however, based on the combination of both...

  10. Sch\\"onemann-Eisenstein-Dumas-type irreducibility conditions that use arbitrarily many prime numbers

    OpenAIRE

    Bonciocat, Nicolae Ciprian

    2013-01-01

    The famous irreducibility criteria of Sch\\"onemann-Eisenstein and Dumas rely on information on the divisibility of the coefficients of a polynomial by a single prime number. In this paper we provide several irreducibility criteria of Sch\\"onemann-Eisenstein-Dumas-type for polynomials with integer coefficients, criteria that are given by some divisibility conditions for their coefficients with respect to arbitrarily many prime numbers. A special attention will be paid to those irreducibility c...

  11. Universally Primed PCR (UP-PCR) and its applications for taxonomy in Trichoderma

    Institute of Scientific and Technical Information of China (English)

    Mette Lübeck

    2004-01-01

    @@ Universally Primed PCR (UP-PCR) is a PCR fingerprinting method that has demonstrated its applicability in different aspects of mycology. These applications constitute analysis of genome structures, identification of species, analysis of population and species diversity, revealing of genetic relatedness at infra-and inter-species level, and identification of UP-PCR markers at different taxonomic levels (strain, group and/or species) . A further development of the UP-PCR technique is an UP-PCR product cross hybridisation assay that facilitates investigation of sequence similarity (homology) of UP-PCR products and grouping of strains into UP-PCR hybridisation groups. This separates the strains into entities with high genetic similarity (DNA homology) . UP-PCR has been used as an aid in taxonomy and species delineation, and to monitor biocontrol strains following their release into the environment by fingerprint characterisation of pure cultures and through direct detection in soil by amplification of UP-PCR-derived SCAR markers. The technique has been applied to Trichoderma strains in particularly with the aims of strain recognition and classification.

  12. Comparison of arbitrarily primed-polymerase chain reaction and plasmid profiles typing of Pseudomonas aeruginosa strains from burn patients and hospital environment

    International Nuclear Information System (INIS)

    Objective was to identify the strengths and weakness of arbitrary primed-polymerase chain reaction (A P-PCR) and plasmid profiles for typing of Pseudomonas aeruginosa (P. aeruginosa) and tracking of source of infections. Seventy-four strains of P. aeruginosa were isolated from burn patients and hospital environment between January to April 2003 in Ghotbadden Burn Hospital, Shiraz, Iran. The strains were classified by photo Capt Mw program, similarity and clustering of strains were assessed using NTSYS-PC version 2.02K software. Based on 50% and 64.7% and 67.5% similarity on the plotted dendrogram, 38 plasmid profiles were classified into: 2, 3 and 5 clusters, respectively. Photo Capt Mw program categorized AP-PCR products to 47 different types of 6 to 12 bands between 0.376 to 3.7 kb. Based on dendrogram pattern 3 levels (62 %, 81% and 84.6%) of similarity were selected. Using these criteria 2, 5and 11 clusters were obtained, respectively. As compared with plasmid profiles, AP-PCR analysis protocol is rapid, reproducible and differentiated the isolates with higher discrimination power. These results suggest that during admission of patients in burn center a limited number of common strains cross-contaminate burn victims. However, transmissions of infection from hospital environment to patients also occur in the minority of the victims. To control cross-contamination of the patient wounds with antibiotics resistant isolates, strong disinfection of patients' bathroom after scrubbing of each patient wounds is mandatory. (author)

  13. RAP-PCR fingerprinting reveals time-dependent expression of development-related genes following differentiation process of Bacillus thuringiensis

    Czech Academy of Sciences Publication Activity Database

    Huang, T.; Yu, X.; Gelbič, Ivan; Guan, X.

    2015-01-01

    Roč. 61, č. 9 (2015), s. 683-690. ISSN 0008-4166 Institutional support: RVO:60077344 Keywords : Bacillus thuringiensis * development * RNA arbitrarily primed PCR Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 1.221, year: 2014

  14. Characterization of Iranian Nonaflatoxigenic Strains of Aspergillus flavus Based on Microsatellite-primed PCR

    Directory of Open Access Journals (Sweden)

    Mahmoud Houshyarfard

    2015-03-01

    Full Text Available Out of fifty-two Iranian nonaflatoxigenic strains of Aspergillus flavus, which were collected from various substrates (soil and kernel and sources (peanut, corn and pistachio, fifteen representatives were selected according to their different geographical origins (six provinces: Guilan and Golestan, Ardebil, Fars, Kerman and Semnan and vegetative compatibility groups (VCGs, IR1 to IR15 for microsatellite-primed PCR analysis. Two inter-simple sequence repeat (ISSR primers AFMPP and AFM13 were used to determine the polymorphism and the relationship among strain isolates. The A. flavus isolates were identified by their morphologies and their identities were confirmed by PCR amplification using the specific primer pair ITS1 and ITS4. The results revealed variations in the percentages of polymorphisms. In ISSR analysis, primers AFMPP and AFM13 generated a total of 18 and 23 amplicons among the fungal strains, which 12 (66.7% and 22 (95.7% were polymorphic, respectively. Cluster analysis of ISSR data was carried out by using 1 D DNA gel image analysis. The two dendrograms obtained through these markers showed six different clustering of testing nonaflatoxigenic A. flavus L strains, but we noted that some clusters were different in some cases. The microsatellite-primed PCR data revealed that the Iranian nonaflatoxigenic isolates of A. flavus were not clustered based on their origins and sources. This study is the first to characterize Iranian nonaflatoxigenic isolates of A. flavus using ISSR markers.

  15. Priming

    DEFF Research Database (Denmark)

    Conrath, Uwe; Beckers, Gerold J.M.; Flors, Victor;

    2006-01-01

    Infection of plants by necrotizing pathogens or colonization of plant roots with certain beneficial microbes causes the induction of a unique physiological state called "priming." The primed state can also be induced by treatment of plants with various natural and synthetic compounds. Primed plants...... display either faster, stronger, or both activation of the various cellular defense responses that are induced following attack by either pathogens or insects or in response to abiotic stress. Although the phenomenon has been known for decades, most progress in our understanding of priming has been made...... over the past few years. Here, we summarize the current knowledge of priming in various induced-resistance phenomena in plants...

  16. Universally Primed-PCR indicates geographical variation of Peronospora farinosa ex. Chenopodium quinoa.

    Science.gov (United States)

    Danielsen, Solveig; Lübeck, Mette

    2010-02-01

    In the Andean region of South America downy mildew, caused by Peronospora farinosa, is the most important disease of quinoa (Chenopodium quinoa). Peronospora farinosa, a highly polyphyletic species, occurs on quinoa and wild relatives on all continents. However, very little is known about the geographic diversity of the pathogen. As the interest in quinoa as a novel crop is increasing worldwide, geographical differences in the population structure of the downy mildew pathogen must be taken into consideration in order to design appropriate control strategies under a variety of circumstances. As a step towards understanding the geographic diversity of P. farinosa from quinoa, 40 downy mildew isolates from the Andean highlands and Denmark were characterized using universally primed PCR (UP-PCR). Eight UP-PCR primers were tested. A combined analysis of markers separated the Danish and Andean isolates in two distinct clusters. This study raises new questions about the origin and spread of P. farinosa on quinoa, its geographic diversity and host specificity. PMID:20175119

  17. Comparison of different PCR approaches for characterization of Burkholderia (Pseudomonas) cepacia isolates.

    OpenAIRE

    Liu, P. Y.; Shi, Z Y; Lau, Y J; HU, B S; Shyr, J M; Tsai, W S; Lin, Y. H.; Tseng, C Y

    1995-01-01

    In this study, we evaluated three PCR methods for epidemiological typing of Burkholderia (Pseudomonas) cepacia--PCR-ribotyping, arbitrarily primed PCR (AP-PCR) and enterobacterial repetitive intergenic consensus sequence PCR (ERIC-PCR)--and compared them with pulsed-field gel electrophoresis. The analysis was performed with 31 isolates of B. cepacia, comprising 23 epidemiologically unrelated isolates and 8 isolates collected from the same patient during two episodes of bacteremia. Pulsed-fiel...

  18. Characterization of Listeria monocytogenes Strains Involved in Invasive and Noninvasive Listeriosis Outbreaks by PCR-Based Fingerprinting Techniques

    OpenAIRE

    Franciosa, Giovanna; Tartaro, Stefania; Wedell-Neergaard, Christina; Aureli, Paolo

    2001-01-01

    A total of 32 Listeria monocytogenes strains (16 from a recent outbreak of invasive listeriosis and 16 from two outbreaks of noninvasive listeriosis, all three occurring in Italy) were characterized by PCR-ribotyping, arbitrarily primed PCR (AP-PCR), and the recently developed infrequent-restriction-site PCR (IRS-PCR). The discriminatory ability of the techniques, first evaluated on 29 unrelated L. monocytogenes food isolates using Simpson's index of diversity, was 0.714 for PCR-ribotyping, 0...

  19. Elucidation of the Vibrio anguillarum genetic response to the potential fish probiont Pseudomonas fluorescens AH2, using RNA-arbitrarily primed PCR

    DEFF Research Database (Denmark)

    Holmstrøm, Kim; Gram, Lone

    2003-01-01

    with the iron chelator 2,2-dipyridyl. A chromosomal transcript homologous to vibE that participates in vibriobactin synthesis in Vibrio cholerae was also upregulated during AH2 exposure. This transcript could represent a functionally active gene in V. anguillarum involved in biosynthesis of anguibactin......The antagonistic interaction between a potential fish probiont, Pseudomonas fluorescens strain AH2, and its target organism, Vibrio anguillarum, was investigated by studying the genetic response of the target organism when it was exposed to the antagonist. We compared the differential display of...

  20. Prime Knowledge about Primes

    Science.gov (United States)

    Eisenberg, Theodore

    2007-01-01

    Several proofs demonstrating that there are infinitely many primes, different types of primes, tests of primality, pseudo primes, prime number generators and open questions about primes are discussed in Section 1. Some of these notions are elaborated upon in Section 2, with discussions of the Riemann zeta function and how algorithmic complexity…

  1. Primes Appearing in Prime Tower Factorization

    CERN Document Server

    Devlin, Patrick

    2012-01-01

    We introduce and consider a certain probability question involving elementary number theory and the likelihood that a fixed prime will appear in a certain recursively defined factorization of an integer. We derive several convergent infinite products for this probability, which we are unable to simplify to obtain closed form solutions. However, we are able to implement these formulas in the development of algorithms to obtain arbitrarily close rigorous bounds on the probabilities in question.

  2. Correction of RT-qPCR data for genomic DNA-derived signals with ValidPrime

    Czech Academy of Sciences Publication Activity Database

    Laurell, H.; Iacovoni, J.S.; Abot, A.; Švec, David; Maoret, J.-J.; Arnal, J.-F.; Kubista, Mikael

    2012-01-01

    Roč. 40, č. 7 (2012), s. 1-10. ISSN 0305-1048 Institutional research plan: CEZ:AV0Z50520701 Keywords : TIME QUANTITATIVE PCR * POLYMERASE-CHAIN-REACTION * GENE-EXPRESSION Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 8.278, year: 2012

  3. Arbitrarily tunable orbital angular momentum of photons.

    Science.gov (United States)

    Pan, Yue; Gao, Xu-Zhen; Ren, Zhi-Cheng; Wang, Xi-Lin; Tu, Chenghou; Li, Yongnan; Wang, Hui-Tian

    2016-01-01

    Orbital angular momentum (OAM) of photons, as a new fundamental degree of freedom, has excited a great diversity of interest, because of a variety of emerging applications. Arbitrarily tunable OAM has gained much attention, but its creation remains still a tremendous challenge. We demonstrate the realization of well-controlled arbitrarily tunable OAM in both theory and experiment. We present the concept of general OAM, which extends the OAM carried by the scalar vortex field to the OAM carried by the azimuthally varying polarized vector field. The arbitrarily tunable OAM we presented has the same characteristics as the well-defined integer OAM: intrinsic OAM, uniform local OAM and intensity ring, and propagation stability. The arbitrarily tunable OAM has unique natures: it is allowed to be flexibly tailored and the radius of the focusing ring can have various choices for a desired OAM, which are of great significance to the benefit of surprising applications of the arbitrary OAM. PMID:27378234

  4. Arbitrarily tunable orbital angular momentum of photons

    Science.gov (United States)

    Pan, Yue; Gao, Xu-Zhen; Ren, Zhi-Cheng; Wang, Xi-Lin; Tu, Chenghou; Li, Yongnan; Wang, Hui-Tian

    2016-01-01

    Orbital angular momentum (OAM) of photons, as a new fundamental degree of freedom, has excited a great diversity of interest, because of a variety of emerging applications. Arbitrarily tunable OAM has gained much attention, but its creation remains still a tremendous challenge. We demonstrate the realization of well-controlled arbitrarily tunable OAM in both theory and experiment. We present the concept of general OAM, which extends the OAM carried by the scalar vortex field to the OAM carried by the azimuthally varying polarized vector field. The arbitrarily tunable OAM we presented has the same characteristics as the well-defined integer OAM: intrinsic OAM, uniform local OAM and intensity ring, and propagation stability. The arbitrarily tunable OAM has unique natures: it is allowed to be flexibly tailored and the radius of the focusing ring can have various choices for a desired OAM, which are of great significance to the benefit of surprising applications of the arbitrary OAM. PMID:27378234

  5. A new approach to the distribution of prime numbers

    OpenAIRE

    Nishii, Yasuo

    2014-01-01

    The aim of the thesis is to determine the distribution of prime numbers by a method induced from the nature of prime numbers which take infinite procudures to be identified when primes are arbitrarily large. The first section is devoted to the introduction. In the second section we mention that the probability is induced when procedures of verifying an assumption are infinite. And we state some results of the probability theory in the third section. At the last section we prove some theorems ...

  6. A note on arbitrarily vertex decomposable graphs

    Directory of Open Access Journals (Sweden)

    Antoni Marczyk

    2006-01-01

    Full Text Available A graph \\(G\\ of order \\(n\\ is said to be arbitrarily vertex decomposable if for each sequence \\((n_{1},\\ldots,n_k\\ of positive integers such that \\(n_{1}+\\ldots+n_{k}=n\\ there exists a partition \\((V_{1},\\ldots,V_{k}\\ of the vertex set of \\(G\\ such that for each \\(i \\in \\{1,\\ldots,k\\}\\, \\(V_{i}\\ induces a connected subgraph of \\(G\\ on \\(n_i\\ vertices. In this paper we show that if \\(G\\ is a two-connected graph on \\(n\\ vertices with the independence number at most \\(\\lceil n/2\\rceil\\ and such that the degree sum of any pair of non-adjacent vertices is at least \\(n-3\\, then \\(G\\ is arbitrarily vertex decomposable. We present another result for connected graphs satisfying a similar condition, where the bound \\(n-3\\ is replaced by \\(n-2\\.

  7. Artificial Neurons with Arbitrarily Complex Internal Structures

    OpenAIRE

    Kohring, G. A.

    2001-01-01

    Artificial neurons with arbitrarily complex internal structure are introduced. The neurons can be described in terms of a set of internal variables, a set activation functions which describe the time evolution of these variables and a set of characteristic functions which control how the neurons interact with one another. The information capacity of attractor networks composed of these generalized neurons is shown to reach the maximum allowed bound. A simple example taken from the domain of p...

  8. Prime Slaughter

    DEFF Research Database (Denmark)

    Valente, Andrea; Marchetti, Emanuela

    2011-01-01

    Starting from the difficulty of creating playful representation of domain-specific abstract concepts, this study discusses the design of Prime Slaughter, a computer game aimed at facilitating individual sense-making of abstract mathematical concepts. Specifically the game proposes a transposition...... of primality and factorization into playful interactions, addressed to primary and early secondary school children. Taking into account individual needs expressed by children regarding play, during a participatory design processes aimed at enhancing learning in museums, Prime Slaughter allows for...

  9. Prime Slaughter

    DEFF Research Database (Denmark)

    Valente, Andrea; Marchetti, Emanuela

    2011-01-01

    Starting from the difficulty of creating playful representation of domain-specific abstract concepts, this study discusses the design of Prime Slaughter, a computer game aimed at facilitating individual sense-making of abstract mathematical concepts. Specifically the game proposes a transposition...

  10. Hawking Temperature of an Arbitrarily Accelerating Black Hole

    Indian Academy of Sciences (India)

    Wei-Zhen Pan; Wei Liu

    2014-09-01

    Hawking temperature of an arbitrarily accelerating black hole with electric and magnetic charges are obtained based on the Klein–Gordon equation with a correct-dimension new tortoise coordinate transformation.

  11. Prime Mover

    DEFF Research Database (Denmark)

    Wagner, Michael Frederik

    2002-01-01

    The important issue of technological determinism is analysed in relation to various theoretical positions, and it is highlighted with a chain of empirical cases drawn form history. The fundamental questions to be considered is the nature of determinism in Karl Marx' philosophical work and the shi...... modernism versus primitivism in historiography. This question is narrowed down to the discussion of the vertical water wheel as the prime mover in history. The problem is related to the abuse of technical development as an independent variable in general history....

  12. PCR-RFLP and AP-PCR of rbcL and ITS of rDNA Show That × Taxodiomeria peizhongii (Taxodium x Cryptomeria) Is not an Intergeneric Hybrid

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    ×Taxodiomeria peizhongiiZ. J. Ye, J. J. Zhang et S. H. Pan was regarded as a new intergeneric hybrid between Taxodium mucronatum Tenore (as the female donor) and Cryptomeria fortunei Hooibrenk ex Otto et Dietr (as the male donor). To confirm the authenticity of the intergeneric hybrid, we analyzed the rbcL gene and the internal transcribed spacer (ITS) of 26S-18S ribosomal RNA gene of the three species using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and arbitrarily primed PCR (AP-PCR), and obtained the following results: i) Taxodiomeria peizhongii had the same RFLP maps of the rbcL gene and the ITS as Taxodium mucronatum, but was different from C. fortunei; ii) a 311-bp PCR amplification product was obtained in C. fortunei by AP-PCR of ITS, but was not found in Taxodiomeria peizhongii. Our results have demonstrated that C. fortunei did not provide any genome for Taxodiomeria peizhongii, implying that T. peizhongii is not an intergeneric hybrid between the two species.

  13. On some families of arbitrarily vertex decomposable spiders

    Directory of Open Access Journals (Sweden)

    Tomasz Juszczyk

    2010-01-01

    Full Text Available A graph \\(G\\ of order \\(n\\ is called arbitrarily vertex decomposable if for each sequence \\((n_1, ..., n_k\\ of positive integers such that \\(\\sum _{i=1}^{k} n_i = n\\, there exists a partition \\((V_1, ..., V_k\\ of the vertex set of \\(G\\ such that for every \\(i \\in \\{1, ...., k\\}\\ the set \\(V_i\\ induces a connected subgraph of \\(G\\ on \\(n_i\\ vertices. A spider is a tree with one vertex of degree at least \\(3\\. We characterize two families of arbitrarily vertex decomposable spiders which are homeomorphic to stars with at most four hanging edges.

  14. T-linker-specific ligation PCR (T-linker PCR): an advanced PCR technique for chromosome walking or for isolation of tagged DNA ends

    OpenAIRE

    Yuanxin, Yan; Chengcai, An; Li, Li; Jiayu, Gu; Guihong, Tan; Zhangliang, Chen

    2003-01-01

    Dozens of PCR-based methods are available for chromosome walking from a known sequence to an unknown region. These methods are of three types: inverse PCR, ligation-mediated PCR and randomly primed PCR. However, none of them has been generally applied for this purpose, because they are either difficult or inefficient. Here we describe a simple and efficient PCR strategy—T-linker-specific ligation PCR (T-linker PCR) for gene or chromosome walking. The strategy amplifies the template molecules ...

  15. Luhn Prime Numbers

    Directory of Open Access Journals (Sweden)

    Octavian Cira

    2015-04-01

    Full Text Available The first prime number with the special property that its addition with reversal gives as result a prime number toois 229. The prime numbers with this property will be called Luhn prime numbers. In this article we intend to presenta performing algorithm for determining the Luhn prime numbers. Using the presented algorithm all the 50598 Luhnprime numbers have been, for p prime smaller than 2 · 107.

  16. LUHN PRIME NUMBERS

    OpenAIRE

    Octavian Cira; Florentin Smarandache

    2015-01-01

    The first prime number with the special property that its addition with reversal gives as result a prime number toois 229. The prime numbers with this property will be called Luhn prime numbers. In this article we intend to presenta performing algorithm for determining the Luhn prime numbers. Using the presented algorithm all the 50598 Luhnprime numbers have been, for p prime smaller than 2 · 107.

  17. Integral representations of unbounded operators by arbitrarily smooth Carleman kernels

    OpenAIRE

    Novitskii, Igor M.

    2002-01-01

    In this paper, we give a characterization of all closed linear operators in a separable Hilbert space which are unitarily equivalent to an integral operator in $L_2(R)$ with bounded and arbitrarily smooth Carleman kernel on $R^2$. In addition, we give an explicit construction of corresponding unitary operators.

  18. Hawking Radiation via Tunnelling from Arbitrarily Dimensional Schwarzschild Black Holes

    Institute of Scientific and Technical Information of China (English)

    REN Jun; ZHAO Zheng; GAO Chang-Jun

    2005-01-01

    @@ We extend Parikh's recent work to the arbitrarily dimensional Schwarzschild black holes whose Arnowitt-DeserMisner (ADM) mass is identical to its mass parameter. We view Hawking radiation as a tunnelling process across the event horizon. From the tunnelling probability we also find a leading correction to the semiclassical emission rate. The result consists with an underlying unitary theory.

  19. ON ALMOST PRIME SUBMODULES

    Institute of Scientific and Technical Information of China (English)

    Hani A. Khashan

    2012-01-01

    In this article,we define almost prime submodules as a new generalization of prime and weakly prime submodules of unitary modules over a commutative ring with identity.We study some basic properties of almost prime submodules and give some characterizations of them,especially for (finitely generated faithful) multiplication modules.

  20. Learning about Primes

    Science.gov (United States)

    McEachran, Alec

    2008-01-01

    In this article, the author relates his unhappy experience in learning about prime numbers at secondary school. To introduce primes, a teacher first told students a definition of a prime number, then students were taught how to find prime numbers. Students defined and listed them and at some later point were tested on their memory of both the…

  1. Motor Priming in Neurorehabilitation

    OpenAIRE

    Stoykov, Mary Ellen; Madhavan, Sangeetha

    2015-01-01

    Priming is a type of implicit learning wherein a stimulus prompts a change in behavior. Priming has been long studied in the field of psychology. More recently, rehabilitation researchers have studied motor priming as a possible way to facilitate motor learning. For example, priming of the motor cortex is associated with changes in neuroplasticity that are associated with improvements in motor performance. Of the numerous motor priming paradigms under investigation, only a few ...

  2. PIV measurement of flow around an arbitrarily moving body

    Science.gov (United States)

    Jeon, Young Jin; Sung, Hyung Jin

    2011-04-01

    This paper presents a PIV (particle image velocimetry) image processing method for measuring flow velocities around an arbitrarily moving body. This image processing technique uses a contour-texture analysis based on user-defined textons to determine the arbitrarily moving interface in the particle images. After the interface tracking procedure is performed, the particle images near the interface are transformed into Cartesian coordinates that are related to the distance from the interface. This transformed image always has a straight interface, so the interrogation windows can easily be arranged at certain distances from the interface. Accurate measurements near the interface can then be achieved by applying the window deformation algorithm in concert with PIV/IG (interface gradiometry). The displacement of each window is evaluated by using the window deformation algorithm and was found to result in acceptable errors except for the border windows. Quantitative evaluations of this method were performed by applying it to computer-generated images and actual PIV measurements.

  3. An arbitrarily function generator for the ramping of booster synchrotron

    International Nuclear Information System (INIS)

    This paper describes the design and implementation of an arbitrarily function generator (AFG), which will be used in the control system of Shanghai Synchrotron Radiation Facility. The AFG is constructed with COTS hardware modules and vxWorks real-time operating system and works under EPICS software environment. The AFG can be used to ramp booster's energy for power supply system, and to control the radio frequency system as well

  4. Bell tests with arbitrarily low photodetection efficiency and homodyne measurements

    CERN Document Server

    Araújo, Mateus; Cavalcanti, Daniel; Santos, Marcelo França; Cabello, Adán; Cunha, Marcelo Terra

    2011-01-01

    We show that hybrid local measurements combining homodyne measurements and photodetection provide violations of a Bell inequality with arbitrarily low photodetection efficiency. This is shown in two different scenarios: when one part receives an atom entangled to the field mode to be measured by the other part and when both parts make similar photonic measurements. Our findings definitely put the hybrid measurement scenario as a strong candidate for the implementation of a loophole-free Bell test.

  5. Kerr black holes as particle accelerators to arbitrarily high energy.

    Science.gov (United States)

    Bañados, Máximo; Silk, Joseph; West, Stephen M

    2009-09-11

    We show that intermediate mass black holes conjectured to be the early precursors of supermassive black holes and surrounded by relic cold dark matter density spikes can act as particle accelerators with collisions, in principle, at arbitrarily high center-of-mass energies in the case of Kerr black holes. While the ejecta from such interactions will be highly redshifted, we may anticipate the possibility of a unique probe of Planck-scale physics. PMID:19792361

  6. Kerr Black Holes as Particle Accelerators to Arbitrarily High Energy

    OpenAIRE

    Bañados, Máximo; Silk, Joseph; West, Stephen M.

    2009-01-01

    We show that intermediate mass black holes conjectured to be the early precursors of supermassive black holes and surrounded by relic cold dark matter density spikes can act as particle accelerators with collisions, in principle, at arbitrarily high centre of mass energies in the case of Kerr black holes. While the ejecta from such interactions will be highly redshifted, we may anticipate the possibility of a unique probe of Planck-scale physics.

  7. Arbitrarily thin metamaterial structure for perfect absorption and giant magnification

    DEFF Research Database (Denmark)

    Jin, Yi; Xiao, Sanshui; Mortensen, N. Asger;

    2011-01-01

    In our common understanding, for strong absorption or amplification in a slab structure, the desire of reducing the slab thickness seems contradictory to the condition of small loss or gain. In this paper, this common understanding is challenged. It is shown that an arbitrarily thin metamaterial ...... perfect absorption, while this is not required for giant magnification. Detailed analysis for the existence of the critical angle and physical explanation for these abnormal phenomena are given. © 2011 Optical Society of America....

  8. Efficient Prime Counting and the Chebyshev Primes

    Directory of Open Access Journals (Sweden)

    Michel Planat

    2013-01-01

    Full Text Available The function where is the logarithm integral and the number of primes up to is well known to be positive up to the (very large Skewes' number. Likewise, according to Robin's work, the functions and , where and are Chebyshev summatory functions, are positive if and only if Riemann hypothesis (RH holds. One introduces the jump function at primes and one investigates , , and . In particular, , and for . Besides, for any odd , an infinite set of the so-called Chebyshev primes. In the context of RH, we introduce the so-called Riemann primes as champions of the function (or of the function . Finally, we find a good prime counting function , that is found to be much better than the standard Riemann prime counting function.

  9. Distributed quantum computation with arbitrarily poor photon detection

    CERN Document Server

    Matsuzaki, Yuichiro; Fitzsimons, Joseph

    2010-01-01

    In a distributed quantum computer scalability is accomplished by networking together many elementary nodes. Typically the network is optical and inter-node entanglement involves photon detection. In complex networks the entanglement fidelity may be degraded by the twin problems of photon loss and dark counts. Here we describe an entanglement protocol which can achieve high fidelity even when these issues are arbitrarily severe; indeed the method succeeds with finite probability even if the detectors are entirely removed from the network. An experimental demonstration should be possible with existing technologies.

  10. Arbitrarily Accurate Dynamical Control in Open Quantum Systems

    CERN Document Server

    Khodjasteh, Kaveh; Viola, Lorenza

    2009-01-01

    We show that open-loop dynamical control techniques may be used to synthesize unitary transformations in open quantum systems in such a way that decoherence is perturbatively compensated for to a desired (in principle arbitrarily high) level of accuracy, which depends only on the strength of the relevant errors, and the achievable rate of control modulation. Our constructive and fully analytical solution employs concatenated dynamically corrected gates, and is applicable independently of detailed knowledge of the system-environment interactions and environment dynamics. Explicit implications for boosting quantum gate fidelities are addressed.

  11. Quantum Network Coding on Networks with Arbitrarily Distributed Hidden Channels

    International Nuclear Information System (INIS)

    Although perfect quantum network coding has been proved to be achievable, it is still puzzling whether it is feasible whenever one or more of the channels are replaced by the hidden ones emerging from quantum entanglement. The question is answered in this paper. First, we propose a quantum network coding protocol over a butterfly network with two hidden channels. Second, we investigate a more general situation, where d-level quantum letters are transmitted through the network containing arbitrarily distributed hidden channels, and prove that quantum network coding on such networks is still achievable. (general)

  12. Distribution of prime numbers

    OpenAIRE

    Ouannas, Moussa

    2011-01-01

    In this paper I present the distribution of prime numbers which was treated in many researches by studying the function of Riemann; because it has a remarkable property; its non trivial zeros are prime numbers; but in this work I will show that we can find the distribution of prime numbers on remaining in natural numbers only.

  13. MIMO Wiretap Channels with Arbitrarily Varying Eavesdropper Channel States

    CERN Document Server

    He, Xiang

    2010-01-01

    In this work, a class of information theoretic secrecy problems is addressed where the eavesdropper channel states are completely unknown to the legitimate parties. In particular, MIMO wiretap channel models are considered where the channel of the eavesdropper is arbitrarily varying over time. Assuming that the number of antennas of the eavesdropper is limited, the secrecy rate of the MIMO wiretap channel in the sense of strong secrecy is derived, and shown to match with the converse in secure degrees of freedom. It is proved that there exists a universal coding scheme that secures the confidential message against any sequence of channel states experienced by the eavesdropper. This yields the conclusion that secure communication is possible regardless of the location or channel states of (potentially infinite number of) eavesdroppers. Additionally, it is observed that, the present setting renders the secrecy capacity problems for multi-terminal wiretap-type channels more tractable as compared the case with fu...

  14. MIMO Multiple Access Channel with an Arbitrarily Varying Eavesdropper

    CERN Document Server

    He, Xiang; Yener, Aylin

    2012-01-01

    A two-transmitter Gaussian multiple access wiretap channel with multiple antennas at each of the nodes is investigated. The channel matrices at the legitimate terminals are fixed and revealed to all the terminals, whereas the channel matrix of the eavesdropper is arbitrarily varying and only known to the eavesdropper. The secrecy degrees of freedom (s.d.o.f.) region under a strong secrecy constraint is characterized. A transmission scheme that orthogonalizes the transmit signals of the two users at the intended receiver and uses a single-user wiretap code is shown to be sufficient to achieve the s.d.o.f. region. The converse involves establishing an upper bound on a weighted-sum-rate expression. This is accomplished by using induction, where at each step one combines the secrecy and multiple-access constraints associated with an adversary eavesdropping a carefully selected group of sub-channels.

  15. Distributed force simulation for arbitrarily shaped IPMC actuators

    Science.gov (United States)

    Martinez, M.; Lumia, R.

    2013-07-01

    This paper presents a simulation model that predicts the force output of arbitrarily shaped ionic polymer-metal composite (IPMC) actuators. Theoretical and experimental force measurements are compared for a triangular IPMC actuator with a tip length of 11 mm. The results show that the simulated tip force is within 80% of the experimentally determined value. Simulated electrical results for an artificial shark pectoral fin and a 7 mm × 17 mm actuator are also presented. In each case, the voltage is shown to decrease exponentially from the input point. The results of an ion migration simulation for a 180 μm cubic element of Nafion are presented for both a constant 2 V input and a 2 V 0.25 Hz sine signal. Finally, the simulated deformation of an IPMC shark fin is shown.

  16. Distributed force simulation for arbitrarily shaped IPMC actuators

    International Nuclear Information System (INIS)

    This paper presents a simulation model that predicts the force output of arbitrarily shaped ionic polymer–metal composite (IPMC) actuators. Theoretical and experimental force measurements are compared for a triangular IPMC actuator with a tip length of 11 mm. The results show that the simulated tip force is within 80% of the experimentally determined value. Simulated electrical results for an artificial shark pectoral fin and a 7 mm × 17 mm actuator are also presented. In each case, the voltage is shown to decrease exponentially from the input point. The results of an ion migration simulation for a 180 μm cubic element of Nafion are presented for both a constant 2 V input and a 2 V 0.25 Hz sine signal. Finally, the simulated deformation of an IPMC shark fin is shown. (paper)

  17. Deterministic list codes for state-constrained arbitrarily varying channels

    CERN Document Server

    Sarwate, Anand D

    2007-01-01

    The capacity for the discrete memoryless arbitrarily varying channel (AVC) with cost constraints on the jammer is studied using deterministic list codes under both the maximal and average probability of error criteria. For a cost function $l(\\cdot)$ on the state set and constraint $\\Lambda$ on the jammer, the achievable rates are upper bounded by the random coding capacity $C_r(\\Lambda)$. For maximal error, the rate $R = C_r(\\Lambda) - \\epsilon$ is achievable using list codes with list size $O(\\epsilon^{-1})$. For average error, an integer $\\lsym(\\Lambda)$, called the \\textit{symmetrizability}, is defined. It is shown that any rate below $C_r(\\Lambda)$ is achievable under average error using list codes of list size $L > \\lsym$. An example is given for a class of discrete additive AVCs.

  18. PIV measurements of flow around an arbitrarily moving free surface

    Science.gov (United States)

    Park, Jinsoo; Im, Sunghyuk; Sung, Hyung Jin; Park, Jun Sang

    2015-03-01

    We present an image preprocessing method for particle image velocimetry (PIV) measurements of flow around an arbitrarily moving free surface. When performing PIV measurements of free surface flows, the interrogation windows neighboring the free surface are vulnerable to a lack, or even an absence, of seeding particles, which induces less reliable measurements of the velocity field. In addition, direct measurements of the free surface velocity using PIV have been challenging due to the intermittent appearance of the arbitrarily moving free surface. To address the aforementioned limitations, the PIV images with a curvilinear free surface can be treated to be suitable for a structured interrogation window arrangement in a Cartesian grid. The proposed image preprocessing method is comprised of a free surface detection method and an image transform process. The free surface position was identified using a free surface detection method based on multiple textons. The detected free surface points were used to transform PIV images of a curvilinear free surface into images with a straightened free surface using a cubic Hermite spline interpolation scheme. After the image preprocessing, PIV algorithms can be applied to the treated PIV images. The fluid-only region velocities were measured using standard PIV method with window deformation, and the free surface velocities were resolved using PIV/interface gradiometry method. The velocity field in the original PIV images was constructed by inverse transforming that in the transformed images. The accuracy of the proposed method was quantitatively evaluated with two sets of synthetic PIV images, and its applicability was examined by applying the present method to free surface flow images, specifically sloshing flow images.

  19. Prime numbers -- your gems

    OpenAIRE

    Motohashi, Yoichi

    2005-01-01

    Prime numbers or primes are man's eternal treasures that have been cherished for several millennia, until today. As their academic ancestors in ancient Mesopotamia, many mathematicians are still trying hard to see primes better. I shall relate here a part of my impressions that I have gathered in a corner of my mind through my own research and excursions outside my profession. This is in essence a translation of my Japanese article that was prepared for my public talk at the general assembly ...

  20. Prime tight frames

    DEFF Research Database (Denmark)

    Lemvig, Jakob; Miller, Christopher; Okoudjou, Kasso A.

    2014-01-01

    to suggest effective analysis and synthesis computation strategies for such frames. Finally, we describe all prime frames constructed from the spectral tetris method, and, as a byproduct, we obtain a characterization of when the spectral tetris construction works for redundancies below two.......We introduce a class of finite tight frames called prime tight frames and prove some of their elementary properties. In particular, we show that any finite tight frame can be written as a union of prime tight frames. We then characterize all prime harmonic tight frames and use thischaracterization...

  1. Distribution of Prime Numbers,twin Primes and Goldbach Conjecture

    OpenAIRE

    Ganguly, Subhajit

    2012-01-01

    The following paper deals with the distribution of prime numbers, the twin prime numbers and the Goldbach conjecture. Starting from the simple assertion that prime numbers are never even, a rule for the distribution of primes is arrived at. Following the same approach, the twin prime conjecture and the Goldbach conjecture are found to be true.

  2. Priming Ability Emotional Intelligence

    Science.gov (United States)

    Schutte, Nicola S.; Malouff, John M.

    2012-01-01

    Two studies examined whether priming self-schemas relating to successful emotional competency results in better emotional intelligence performance. In the first study participants were randomly assigned to a successful emotional competency self-schema prime condition or a control condition and then completed an ability measure of emotional…

  3. Building Numbers from Primes

    Science.gov (United States)

    Burkhart, Jerry

    2009-01-01

    Prime numbers are often described as the "building blocks" of natural numbers. This article shows how the author and his students took this idea literally by using prime factorizations to build numbers with blocks. In this activity, students explore many concepts of number theory, including the relationship between greatest common factors and…

  4. Generating Primes Using Partitions

    OpenAIRE

    Pittu, Ganesh Reddy

    2015-01-01

    This paper presents a new technique of generating large prime numbers using a smaller one by employing Goldbach partitions. Experiments are presented showing how this method produces candidate prime numbers that are subsequently tested using either Miller Rabin or AKS primality tests.

  5. Discovery: Prime Numbers

    Science.gov (United States)

    de Mestre, Neville

    2008-01-01

    Prime numbers are important as the building blocks for the set of all natural numbers, because prime factorisation is an important and useful property of all natural numbers. Students can discover them by using the method known as the Sieve of Eratosthenes, named after the Greek geographer and astronomer who lived from c. 276-194 BC. Eratosthenes…

  6. Prime Submodules and Flat Modules

    Institute of Scientific and Technical Information of China (English)

    A.AZIZI

    2007-01-01

    In this paper, some characterizations of prime submodules in fiat modules and, particularly,in free modules are given. Furthermore, the height of prime submodules and some saturated chain of prime submodules are also given.

  7. Quasi-static relaxation of arbitrarily shaped sessile drops

    CERN Document Server

    Iliev, S; Nikolayev, Vadim

    2016-01-01

    We study a spontaneous relaxation dynamics of arbitrarily shaped liquid drops on solid surfaces in the partial wetting regime. It is assumed that the energy dissipated near the contact line is much larger than that in the bulk of the fluid. We have shown rigorously in the case of quasi-static relaxation using the standard mechanical description of dissipative system dynamics that the introduction of a dissipation term proportional to the contact line length leads to the well known local relation between the contact line velocity and the dynamic contact angle at every point of an arbitrary contact line shape. A numerical code is developed for 3D drops to study the dependence of the relaxation dynamics on the initial drop shape. The available asymptotic solutions are tested against the obtained numerical data. We show how the relaxation at a given point of the contact line is influenced by the dynamics of the whole drop which is a manifestation of the non-local

  8. Auto-focused virtual source imaging with arbitrarily shaped interfaces.

    Science.gov (United States)

    Camacho, Jorge; Cruza, Jorge F

    2015-11-01

    This work presents a new method, named auto-focused virtual source imaging (AVSI), for synthetic aperture focusing through arbitrarily shaped interfaces with arrays. First, the shape of the component surface is obtained by time-of-flight (TOF) measurements. Then, a set of virtual source/receivers is created by focusing several array subapertures at the interface normal incidence points. Finally, the synthetic aperture focusing technique (SAFT) is applied to the received signals to generate a high-resolution image. The AVSI method provides several advantages for ultrasonic imaging in a two-media scenario. First, knowledge of the probe-part geometry is not required, because all information needed for image formation is obtained from a set of ultrasonic measurements. Second, refraction complications in TOF calculations are avoided, because foci at the interface can be considered as virtual source/ receivers, and SAFT can be performed in the second medium only. Third, the signal-to-noise ratio is higher than with synthetic aperture techniques that use a single element as emitter, and fourth, resolution is higher than that obtained by phased-array imaging with the same number of active elements, which reduces hardware complexity. The theoretical bases of the method are given, and its performance is evaluated by simulation. Finally, experimental results showing good agreement with theory are presented. PMID:26559624

  9. Prime numbers: periodicity, chaos, noise

    OpenAIRE

    Bershadskii, A.

    2011-01-01

    Logarithmic gaps have been used in order to find a periodic component of the sequence of prime numbers, hidden by a random noise (stochastic or chaotic). The recovered period for the sequence of the first 10000 prime numbers is equal to 8\\pm1 (subject to the prime number theorem). For small and moderate values of the prime numbers (first 2000 prime numbers) this result has been directly checked using the twin prime killing method.

  10. Priming semantico e museografia

    Directory of Open Access Journals (Sweden)

    Annalisa Banzi

    2012-05-01

    Full Text Available Il priming è una tipologia di memoria implicita che facilita l’apprendimento di stimoli di diversa natura (stimoli visivi, semantici, etc.. Un allestimento museale che adotti strumenti basati sul priming potrebbe aiutare il pubblico a selezionare i contenuti relativi agli oggetti esposti. In questo articolo viene descritta l’applicazione del priming semantico allo spazio museale. Questa operazione in prima battutta potrebbe essere letta come una mancanza di fiducia nelle capacità cognitive del visitatore nel discriminare il significato delle informazioni. In realtà è una forma di sostegno per aiutare il visitatore a sviluppare gradualmente una propria metodologia di approccio ai contenuti proposti nel museo. Grazie al priming, il pubblico riceve una serie di stimoli che possono aiutare a costituire la base delle proprie conoscenze in ambito storico-artistico ed essere il punto di partenza sul quale costruire un metodo critico.   Many psychological aspects such as motivation, emotion, and attention, affect human learning. Among these, priming triggers and tunes implicit memory processes. Hence the goal of this paper is to check whether semantic priming can be used as an effective tool to design a supportive museum environment where people can easily learn. Moreover, the resulting stronger and more persistent memories could encourage museum visitors to learn more and better, and to develop a method to “read” the artworks. After a brief overview of current models of semantic priming, practical and theoretical issues are considered and discussed.

  11. A Relation between Prime Numbers and Twin Prime Numbers

    OpenAIRE

    Ergin, A.

    2001-01-01

    Every mathematician has been concerned with prime numbers, and has metwith mysterious surprises about them. Besides intuition, using empirical methods has an important role to findrelations between prime numbers. A relation between any prime numberand any twin prime number has been obtained.

  12. Anchored PCR (A-PCR):A new method for chromosome walking

    Institute of Scientific and Technical Information of China (English)

    CHEN Bojun; SUN Chao; WANG Yong; HU Yuanlei; LIN Zhongping

    2004-01-01

    @@ PCR-based techniques are most popular methods for isolation of DNA sequences flanking a known region.Such techniques published to date mainly include three types: inverse PCR (IPCR)[1-3], ligation-mediated PCR (LM-PCR)[4-9] and randomly primed PCR (RP-PCR)[10-12].IPCR was the first method developed for this kind of purpose. However, it is now rarely used because of the difficulty in finding suitable restriction sites in the target region or poor circularization of the template molecule.LM-PCR and RP-PCR are more frequently used nowadays, yet they also have some limitations. For example,LM-PCR depends on restriction sites within a reasonable distance in the flanking regions, while the amplified products of RP-PCR are generally small (<1 kb). Moreover, both methods often result in excessive amplification of non-specific molecules, which greatly reduces their efficiencies in obtaining sequences of interest. To resolve these problems, some new strategies have emerged in the past few years, such as Vectorette-PCR[6], biotin-capture PCR[7], TAIL-PCR[l2] and T-linker PCR[9]. These improved methods are more efficient than their old versions;however, most of them are still limited by restriction digestion or ligation. Although the intervening steps are avoided in TAIL-PCR, the amplified fragments are often small because of the use of random primers.

  13. Molecular Relationship Between BALADI And Crossbred Bovine Female Calves Using AP-PCR And Its Relation To Body Weight

    International Nuclear Information System (INIS)

    This experiment was conducted in the bovine farm of Experimental Farms Project of Nuclear Research Centre, Atomic Energy Authority of Egypt, which is located in the desert area of Inshas. DNA fingerprinting analysis using arbitrarily primed-polymerase chain reaction (AP-PCR) is a powerful technique for detecting markers that can be used for establishment of genetic variations, molecular relationships and taxonomy identifications between different animal breeds. In the present study, for detecting the genetic relationship between Egyptian bovine Baladi female and crossbred calves (Brown Swiss Baladi) previously imported, blood samples were collected from 10 animals (5 for each breed), DNA was isolated and AP-PCR technique was applied using four random primers to establish fingerprinting and molecular relationship between the two breeds using radioactive 32P-dCTP for labelling the fragments amplified in PCR.. The band sharing coefficient between the two groups was calculated, and the quantity of DNA was correlated with average daily gain (ADG). The data showed non- significant correlation between the quantity of DNA and average daily gain. Also, data showed the powerful of the technique for detecting the molecular variations and there is a specific pattern for certain breeds especially when using the Knp-X primer. The present study also revealed that there was a close genetic relationship between the Egyptian Baladi breed and the crossbred calves (Brown Swiss Baladi) in about seventy percent of the genetic materials as represented by band-sharing (BS) = 0.7. In conclusion, the AP-PCR technique is effective in detecting the molecular variations between different breeds and provides a potential tool for studying the molecular relationships. The native Egyptian calves are genetically closely related to crossbred (Brown Swiss Baladi) by about 70%. Further studies on the large scale are needed using different primers for detecting patterns specific for each breed and

  14. The Set of Prime Numbers

    OpenAIRE

    Iovane, Gerardo

    2007-01-01

    In this work we show that the prime distribution is deterministic. Indeed the set of prime numbers P can be expressed in terms of two subsets of N using three specific selection rules, acting on two sets of prime candidates. The prime candidates are obtained in terms of the first perfect number. The asymptotic behaviour is also considered. We obtain for the first time an explicit relation for generating the full set P of prime numbers smaller than n or equal to n.

  15. Correlations between large prime numbers

    OpenAIRE

    Bershadskii, A.

    2011-01-01

    It is shown that short-range correlations between large prime numbers (~10^5 and larger) have a Poissonian nature. Correlation length \\zeta = 4.5 for the primes ~10^5 and it is increasing logarithmically according to the prime number theorem. For moderate prime numbers (~10^4) the Poissonian distribution is not applicable while the correlation length surprisingly continues to follow to the logarithmical law. A chaotic (deterministic) hypothesis has been suggested to explain the moderate prime...

  16. SPS-ALPHA: The First Practical Solar Power Satellite via Arbitrarily Large PHased Array Project

    Data.gov (United States)

    National Aeronautics and Space Administration — SPS-ALPHA (Solar Power Satellite via Arbitrarily Large Phased Array) is a novel, bio-mimetic approach to the challenge of space solar power. If successful, this...

  17. 锚定PCR(Anchored PCR):一种新的染色体步行方法

    Institute of Scientific and Technical Information of China (English)

    陈柏君; 孙超; 王勇; 胡鸢雷; 林忠平

    2004-01-01

    基于PCR的技术是克隆已知DNA片段侧翼序列的最常用方法.到目前为止,这些方法大致可以分为3种类型:反向PCR(inverse PCR)、连接介导的PCR(1igation-mediated PCR)和随机引物PCR(randomly primed PCR).反向PCR是使用最早的方法,其原理是用限制性内切酶消化基因组总

  18. Linear Equations in Primes

    OpenAIRE

    Green, Ben; Tao, Terence

    2006-01-01

    Consider a system \\Psi of non-constant affine-linear forms \\psi_1,...,\\psi_t: Z^d -> Z, no two of which are linearly dependent. Let N be a large integer, and let K be a convex subset of [-N,N]^d. A famous and difficult open conjecture of Hardy and Littlewood predicts an asymptotic, as N -> \\infty, for the number of integer points n in K for which the integers \\psi_1(n),...,\\psi_t(n) are simultaneously prime. This implies many other well-known conjectures, such as the Hardy-Littlewood prime tu...

  19. PCR thermocycler

    Science.gov (United States)

    Benett, William J.; Richards, James B.

    2003-01-01

    A sleeve-type silicon polymerase chain reaction (PCR) chamber or thermocycler having improved thermal performance. The silicon sleeve reaction chamber is improved in thermal performance by etched features therein that reduce thermal mass and increase the surface area of the sleeve for cooling. This improved thermal performance of the thermocycler enables an increase in speed and efficiency of the reaction chamber. The improvement is accomplished by providing grooves in the faces of the sleeve and a series of grooves on the interior surfaces that connect with grooves on the faces of the sleeve. The grooves can be anisotropically etched in the silicon sleeve simultaneously with formation of the chamber.

  20. 13 CFR 125.2 - Prime contracting assistance.

    Science.gov (United States)

    2010-01-01

    ... the procuring activity's Small Business Specialist (SBS) when the acquisition strategy contemplates an..., the PCR will work with the procuring activity to tailor a strategy that preserves small business prime... CFR 19.505). (8) PCRs will work with the cognizant SBS and agency OSDBU as early in the...

  1. Detecting Priming News Events

    CERN Document Server

    Wu, Di; Yu, Jeffrey Xu; Liu, Zheng

    2012-01-01

    We study a problem of detecting priming events based on a time series index and an evolving document stream. We define a priming event as an event which triggers abnormal movements of the time series index, i.e., the Iraq war with respect to the president approval index of President Bush. Existing solutions either focus on organizing coherent keywords from a document stream into events or identifying correlated movements between keyword frequency trajectories and the time series index. In this paper, we tackle the problem in two major steps. (1) We identify the elements that form a priming event. The element identified is called influential topic which consists of a set of coherent keywords. And we extract them by looking at the correlation between keyword trajectories and the interested time series index at a global level. (2) We extract priming events by detecting and organizing the bursty influential topics at a micro level. We evaluate our algorithms on a real-world dataset and the result confirms that ou...

  2. PrimeFaces blueprints

    CERN Document Server

    Jonna, Sudheer

    2014-01-01

    If you are a Java developer with experience of frontend UI development, and want to take the plunge to develop stunning UI applications with the most popular JSF framework, PrimeFaces, then this book is for you. For those with entrepreneurial aspirations, this book will provide valuable insights into how to utilize successful business models.

  3. Lindenmayer systems and primes

    OpenAIRE

    Vieru, Andrei

    2008-01-01

    We study the surprising discrepancy between the number of primes corresponding, respectively, to the two letters of an infinite word engendered by one of the simplest Lindenmayer systems. We formulate a conjecture concerning the rate of growth of this discrepancy, which seems to tend to e for every two sufficiently high consecutive even rank iterates of the Lindenmayer system.

  4. On Particles and Primes

    CERN Document Server

    Knill, Oliver

    2016-01-01

    Primes in the two complete associative normed division algebras C and H have affinities with structures seen in the standard model of particle physics. On the integers in the two algebras, there are two equivalence relations: a strong one, related to a U(1) and SU(3) symmetry allowing to permute and switch signs of the coordinates of the integers, as well as a weak relation with origins from units U(1),SU(2) in the algebra. Weak equivalence classes within the strong equivalence classes of odd primes in C case relate to leptons, the inert ones being neutrino like, and the split ones resembling electron-positron pairs. In the H case, for odd primes, the equivalence classes come in groups of two or three, leading to a caricature of hadrons featuring either mesons built by a quark pair or then baryons obtained by quark triplets. We can now list for every rational prime p all these particles and attach fractional charges to its constituents.

  5. Pisot Numbers and Primes

    CERN Document Server

    Vieru, Andrei

    2012-01-01

    We define and study a transform whose iterates bring to the fore interesting relations between Pisot numbers and primes. Although the relations we describe are general, they take a particular form in the Pisot limit points. We give three elegant formulae, which permit to locate on the whole semi-line all limit points that are not integer powers of other Pisot numbers.

  6. On formula to compute primes and the nth prime

    CERN Document Server

    Kaddoura, Issam

    2012-01-01

    In this paper, we propose a new primality test, and then we employ this test to find a formula for {\\pi} that computes the number of primes within any interval. We finally propose a new formula that computes the nth prime number as well as the next prime for any given number

  7. Binomial expansions modulo prime powers

    Directory of Open Access Journals (Sweden)

    Paul W. Haggard

    1980-01-01

    Full Text Available In this note a result is given and proved concerning binomial expansions modulo prime powers. In the proof congruence modulo prime powers is generalized to the rational numbers via valuations.

  8. Rhizosphere priming: a nutrient perspective

    OpenAIRE

    Feike Auke Dijkstra; Yolima eCarrillo; Elise ePendall; Morgan, Jack A.

    2013-01-01

    Rhizosphere priming is the change in decomposition of soil organic matter (SOM) caused by root activity. Rhizosphere priming plays a crucial role in soil carbon (C) dynamics and their response to global climate change. Rhizosphere priming may be affected by soil nutrient availability, but rhizosphere priming itself can also affect nutrient supply to plants. These interactive effects may be of particular relevance in understanding the sustained increase in plant growth and nutrient supply i...

  9. Some properties of Fibonacci primes

    OpenAIRE

    Barbulescu, A.; Savin, D.

    2011-01-01

    In this article we charaterize the primes Fibonacci numbers of the form $x^2 +ry^2$, where $r = 1,$ $r$ is a prime positive integer number or r is a power of a prime positive integer, using techniques of combinatorics and numbers theory. We also evaluate some distances related to the Fibonacci numbers and function.

  10. Chen's Theorem with Small Primes

    Institute of Scientific and Technical Information of China (English)

    Ying Chun CAI

    2002-01-01

    Let N be a sufficiently large even integer. In this paper it is proved that the equationN = p + P2, p ≤ N0.95,is solvable, where p denotes a prime and P2 denotes an almost prime with at most two prime factors.

  11. Chen's Theorem with Small Primes

    Institute of Scientific and Technical Information of China (English)

    Yingjie LI; Yingchun CAI

    2011-01-01

    Let N be a sufficiently large even integer. Let p denote a prime and P2 denote an almost prime with at most two prime factors. In this paper, it is proved that the equation N - p+ P2 (p ≤ AT0.945) is solvable.

  12. Rhizosphere priming: a nutrient perspective

    Science.gov (United States)

    Rhizosphere priming is the change in decomposition of soil organic matter (SOM) caused by root activity. Rhizosphere priming plays a crucial role in soil carbon (C) dynamics and their response to global climate change. Rhizosphere priming may be affected by soil nutrient availability, but rhizospher...

  13. Generation of large prime numbers from a sequence of previous prime numbers

    Science.gov (United States)

    Samir, Brahim Belhaouari; Rezk, Youssef A. Y.

    2012-09-01

    A prime number is co-prime with all the primes as well. This paper utilizes this fact by generating larger prime numbers based on a set of smaller prime numbers. The prime numbers are ordered and each two consecutive primes are coupled to generate their co-prime number formula extending this process larger prime sequence is established. Will the process help us produce larger prime numbers faster and more efficiently? This paper investigates the described process.

  14. Remarkable and Reversible Prime Number Patterns

    OpenAIRE

    Weber, H. J.

    2012-01-01

    Prime number multiplet classifications and patterns are extended to negative integers. The extension from prime numbers to single prime powers is also studied. Prime number septets at equal distance are given. It is also shown that each class of generalized twin primes of the classification contains a positive fraction of all prime pairs.

  15. Integral representations of closed operators as bi-Carleman operators with arbitrarily smooth kernels

    OpenAIRE

    Novitskii, Igor M.

    2004-01-01

    In this paper, we characterize all closed linear operators in a separable Hilbert space which are unitarily equivalent to an integral bi-Carleman operator in $L_2(R)$ with bounded and arbitrarily smooth kernel on $R^2$. In addition, we give an explicit construction of corresponding unitary operators. The main result is a qualitative sharpening of an earlier result of [5].

  16. Explicit solution of the Volterra integral equation for transient fields on inhomogeneous arbitrarily shaped dielectric bodies

    KAUST Repository

    Al Jarro, Ahmed

    2011-09-01

    A new predictor-corrector scheme for solving the Volterra integral equation to analyze transient electromagnetic wave interactions with arbitrarily shaped inhomogeneous dielectric bodies is considered. Numerical results demonstrating stability and accuracy of the proposed method are presented. © 2011 IEEE.

  17. Prime time sexual harrassment.

    Science.gov (United States)

    Grauerholz, E; King, A

    1997-04-01

    This study explores the explicit and implicit messages of sexual harassment that viewers receive when viewing prime-time television in the US. A content analysis of 48 hours of prime-time television reveals that sexual harassment on television is both highly visible and invisible. Sexual harassment is rendered visible simply by its prominence in these programs. Incidents involving quid-pro-quo harassment and environmental harassment occur with regularity on television. Furthermore, about 84% of the shows studied contained at least one incident of sexual harassment; yet these acts of sexual harassment remained largely invisible because none of the behaviors were labeled as sexual harassment. These incidents are presented in humorous ways, and victims are generally unharmed and very effective at ending the harassment. Although such programs may actually reflect the reality of many women's lives in terms of prevalence of sexual harassment, they perpetuate several myths about sexual harassment, such as that sexual harassment is not serious and that victims should be able to handle the situations themselves. PMID:12294811

  18. Prime injections and quasipolarities

    Directory of Open Access Journals (Sweden)

    Octavio Alberto Agustín-Aquino

    2014-05-01

    Full Text Available Let $p$ be a prime number. Consider the injection\\[ \\iota:\\mathbb{Z}/n\\mathbb{Z}\\to\\mathbb{Z}/pn\\mathbb{Z}:x\\mapsto px, \\]and the elements $e^{u}.v:=(u,v\\in \\mathbb{Z}/n\\mathbb{Z}\\rtimes \\mathbb{Z}/n\\mathbb{Z}^{\\times}$ and$e^{w}.r:=(w,r\\in \\mathbb{Z}/pn \\mathbb{Z}\\rtimes \\mathbb{Z}/pn\\mathbb{Z}^{\\times}$. Suppose that $e^{u}.v\\in\\mathbb{Z}/n\\mathbb{Z}\\rtimes \\mathbb{Z}/n\\mathbb{Z}^{\\times}$ is seen as an automorphism of $\\mathbb{Z}/n\\mathbb{Z}$defined by $e^{u}.v(x=vx+u$; then $e^{u}.v$ is a \\emph{quasipolarity} if it is an involution without fixed points.In this brief note we give an explicit formula for the number of quasipolarities of $\\mathbb{Z}/n\\mathbb{Z}$ interms of the prime decomposition of $n$, and we prove sufficient conditions such that $(e^{w}.r\\circ \\iota=\\iota\\circ (e^{u}.v$, where $e^{w}.r$ and $e^{u}.v$ are quasipolarities.

  19. Psychotherapy Augmentation through Preconscious Priming

    OpenAIRE

    Borgeat, François; O’Connor, Kieron; Amado, Danielle; St-Pierre-Delorme, Marie-Ève

    2013-01-01

    Objective: To test the hypothesis that repeated preconscious (masked) priming of personalized positive cognitions could augment cognitive change and facilitate achievement of patients’ goals following a therapy. Methods: Twenty social phobic patients (13 women) completed a 36-weeks study beginning by 12 weeks of group behavioral therapy. After the therapy, they received 6 weeks of preconscious priming and 6 weeks of a control procedure in a randomized cross-over design. The Priming conditi...

  20. Psychotherapy augmentation through preconscious priming

    OpenAIRE

    Francois eBorgeat; Kieron eO'Connor; Danielle eAmado; Marie-Eve eSt-Pierre-Delorme

    2013-01-01

    Objective: To test the hypothesis that repeated preconscious (masked) priming of personalized positive cognitions could augment cognitive change and facilitate achievement of patients’ goals following a therapy.Methods: Twenty social phobic patients (13 women) completed a 36 weeks study beginning by 12 weeks of group behavioural therapy. After the therapy, they received 6 weeks of preconscious priming and 6 weeks of a control procedure in a randomized cross-over design. The Priming condition ...

  1. Expected gaps between prime numbers

    OpenAIRE

    Holt, Fred B.

    2007-01-01

    We study the gaps between consecutive prime numbers directly through Eratosthenes sieve. Using elementary methods, we identify a recursive relation for these gaps and for specific sequences of consecutive gaps, known as constellations. Using this recursion we can estimate the numbers of a gap or of a constellation that occur between a prime and its square. This recursion also has explicit implications for open questions about gaps between prime numbers, including three questions posed by Erd\\...

  2. On Problems Related to Primes: Some Ideas

    OpenAIRE

    Mehendale, Dhananjay P.

    2005-01-01

    We present some new ideas on important problems related to primes. The topics of our discussion are: simple formulae for primes, twin primes, Sophie Germain primes, prime tuples less than or equal to a predefined number, and their infinitude; establishment of a kind of similarity between natural numbers and numbers that appear in an arithmetic progression, similar formulae for primes and the so called generalized twin primes in an arithmetic progression and their infinitude; generalization of...

  3. Attention to primes modulates affective priming of pronunciation responses.

    Science.gov (United States)

    De Houwer, Jan; Randell, Tom

    2002-01-01

    In studies on affective priming of pronunciation responses, two words are presented on each trial and participants are asked to read the second word out loud. Whereas some studies revealed shorter reaction times when the two words had the same valence than when they had a different valence, other studies either found no effect of affective congruence or revealed a reversed effect. In the present experiments, a significant effect of affective congruence only emerged when filler trials were presented in which the prime and target were identical and participants were instructed to attend to the primes (Experiment 2). No effects were found when participants were merely instructed to attend to or ignore the primes (Experiment 1), or when affectively incongruent filler trials were presented and participants were instructed to ignore the primes (Experiment 2). PMID:12152360

  4. Primes, Geometry and Condensed Matter

    Directory of Open Access Journals (Sweden)

    Al Rabeh R. H.

    2009-07-01

    Full Text Available Fascination with primes dates back to the Greeks and before. Primes are named by some “the elementary particles of arithmetic” as every nonprime integer is made of a unique set of primes. In this article we point to new connections between primes, geometry and physics which show that primes could be called “the elementary particles of physics” too. This study considers the problem of closely packing similar circles / spheres in 2D / 3D space. This is in effect a discretization process of space and the allowable num- ber in a pack is found to lead to some unexpected cases of prime configurations which is independent of the size of the constituents. We next suggest that a non-prime can be considered geometrically as a symmetric collection that is separable (factorable into similar parts- six is two threes or three twos for example. A collection that has no such symmetry is a prime. As a result, a physical prime aggregate is more difficult to split symmetrically resulting in an inherent stability. This “number / physical” stability idea applies to bigger collections made from smaller (prime units leading to larger sta- ble prime structures in a limitless scaling up process. The distribution of primes among numbers can be understood better using the packing ideas described here and we further suggest that differing numbers (and values of distinct prime factors making a nonprime collection is an important factor in determining the probability and method of possible and subsequent disintegration. Disintegration is bound by energy conservation and is closely related to symmetry by Noether theorems. Thinking of condensed matter as the packing of identical elements, we examine plots of the masses of chemical elements of the periodic table, and also those of the elementary particles of physics, and show that prime packing rules seem to play a role in the make up of matter. The plots show con- vincingly that the growth of prime numbers and that

  5. Primes, Geometry and Condensed Matter

    Directory of Open Access Journals (Sweden)

    Al Rabeh R. H.

    2009-07-01

    Full Text Available Fascination with primes dates back to the Greeks and before. Primes are named by some "the elementary particles of arithmetic" as every nonprime integer is made of a unique set of primes. In this article we point to new connections between primes, geometry and physics which show that primes could be called "the elementary particles of physics" too. This study considers the problem of closely packing similar circles/spheres in 2D/3D space. This is in effect a discretization process of space and the allowable number in a pack is found to lead to some unexpected cases of prime configurations which is independent of the size of the constituents. We next suggest that a non-prime can be considered geometrically as a symmetric collection that is separable (factorable into similar parts- six is two threes or three twos for example. A collection that has no such symmetry is a prime. As a result, a physical prime aggregate is more difficult to split symmetrically resulting in an inherent stability. This "number/physical" stability idea applies to bigger collections made from smaller (prime units leading to larger stable prime structures in a limitless scaling up process. The distribution of primes among numbers can be understood better using the packing ideas described here and we further suggest that differing numbers (and values of distinct prime factors making a nonprime collection is an important factor in determining the probability and method of possible and subsequent disintegration. Disintegration is bound by energy conservation and is closely related to symmetry by Noether theorems. Thinking of condensed matter as the packing of identical elements, we examine plots of the masses of chemical elements of the periodic table, and also those of the elementary particles of physics, and show that prime packing rules seem to play a role in the make up of matter. The plots show convincingly that the growth of prime numbers and that of the masses of

  6. Detection of the frequency, antimicrobial susceptibility, and genotypic discrimination of Aeromonas strains isolated from municipally treated tap water samples by cultivation and AP-PCR.

    Science.gov (United States)

    Emekdas, Gurol; Aslan, Gonul; Tezcan, Seda; Serin, Mehmet Sami; Yildiz, Cilem; Ozturhan, Hakan; Durmaz, Riza

    2006-04-01

    The frequency, antibiotic susceptibility, and genotypic discrimination of Aeromonas strains isolated from municipally treated drinking tap water distribution systems were investigated in this study. We have analyzed 148 tap water samples collected from 8 different locations by bacterial cultivation and arbitrarily primed polymerase chain reaction (AP-PCR). Gram negative, hemolytic, oxidase (+) and catalase (+) bacterial colonies were applied to the study. Identification of bacterial colonies was done by conventional biochemical method and API ID 20E panel (BioMerieux-France). Molecular epidemiological discrimination of the isolates was done by AP-PCR. Aeromonas spp. was detected in 6 of 148 (4%) tap water samples from 8 different locations. Five isolates were identified as Aeromonas hydrophila and one isolate was identified as Vibrio fluvialis by conventional biochemical method. These data were also confirmed by API 20E panel. One of 6 isolates was resistant to gentamicin, 2 of 6 isolates were resistant to trimethoprim/sulfamethoxazole, 4 of 6 isolates were resistant to ampicillin and ampicillin-sulbactam and all of 6 isolates were resistant to cephalothin. All isolates were found to be susceptible to amikacin, aztreonam, ceftazidime, ceftriaxone, ciprofloxacin. All 6 strains of Aeromonas were discriminated by AP-PCR and were determined that all isolates were from different genotypic sources. Although the frequency of the isolates was under the standard limits, the results indicate that hemolytic A. hydrophila are present in municipally treated tap water samples in Mersin City. While all strains were genotypically distinct, all of them were resistant to first generation beta lactam antibiotics tested in this study. PMID:16427154

  7. Investigating Home Primes and Their Families

    Science.gov (United States)

    Herman, Marlena; Schiffman, Jay

    2014-01-01

    The process of prime factor splicing to generate home primes raises opportunity for conjecture and exploration. The notion of "home primes" is relatively new in the chronicle of mathematics. Heleen (1996-97) first described a procedure called "prime factor splicing" (PFS). The exploration of home primes is interesting and…

  8. Vesicle Priming in a SNAP

    OpenAIRE

    Müller, Martin; Davis, Graeme W.

    2010-01-01

    In this issue of Neuron, Burgalossi et al. (2010) investigate synaptic vesicle priming using presynaptic Ca2+ uncaging at a small, glutamatergic, central synapse. Combining this technique with mouse genetics, the authors demonstrate that vesicle priming during ongoing neural activity can be limited by the recycling of recently used SNARE complexes.

  9. PrimeFaces beginner's guide

    CERN Document Server

    Reddy, K Siva Prasad

    2013-01-01

    A guide for beginner's with step-by-step instructions and an easy-to-follow approach.PrimeFaces Beginners Guide is a simple and effective guide for beginners, wanting to learn and implement PrimeFaces in their JSF-based applications. Some basic JSF and jQuery skills are required before you start working through the book.

  10. Almost primes in short intervals

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In this paper,we prove that the short interval(x-x101/232,x] contains at least an almost prime P2 for sufficiently large x,where P2 denotes an integer having at most two prime factors counted with multiplicity.

  11. Representing Numbers: Prime and Irrational

    Science.gov (United States)

    Zazkis, Rina

    2005-01-01

    This article draws an analogy between prime and irrational numbers with respect to how these numbers are defined and how they are perceived by learners. Excerpts are presented from two research studies: a study on understanding prime numbers by pre-service elementary school teachers and a study on understanding irrational numbers by pre-service…

  12. Data Compression with Prime Numbers

    OpenAIRE

    Chalmers, Gordon

    2005-01-01

    A compression algorithm is presented that uses the set of prime numbers. Sequences of numbers are correlated with the prime numbers, and labeled with the integers. The algorithm can be iterated on data sets, generating factors of doubles on the compression.

  13. MPprimer: a program for reliable multiplex PCR primer design

    OpenAIRE

    Wang Xiaolei; Hang Xingyi; Li Zhifeng; Wu Yonghong; Lu Yiming; Wang Wen; Qu Wubin; Shen Zhiyong; Zhao Dongsheng; Zhang Chenggang

    2010-01-01

    Abstract Background Multiplex PCR, defined as the simultaneous amplification of multiple regions of a DNA template or multiple DNA templates using more than one primer set (comprising a forward primer and a reverse primer) in one tube, has been widely used in diagnostic applications of clinical and environmental microbiology studies. However, primer design for multiplex PCR is still a challenging problem and several factors need to be considered. These problems include mis-priming due to nons...

  14. Hawking Radiation of an Arbitrarily Accelerating Kinnersley Black Hole: Spin-Acceleration Coupling Effect

    CERN Document Server

    Shuang-Qing, W; Shuang-Qing, Wu; Mu-Lin, Yan

    2003-01-01

    The Hawking radiation of Weyl neutrinos in an arbitrarily accelerating Kinnersley black hole is investigated by using a method of the generalized tortoise coordinate transformation. Both the location and temperature of the event horizon depend on the time and on the angles. They coincide with previous results, but the thermal radiation spectrum of massless spinor particles displays a kind of spin-acceleration coupling effect.

  15. Hawking Radiation of Dirac Particles in an Arbitrarily Accelerating Kinnersley Black Hole

    CERN Document Server

    Wu, S Q

    2002-01-01

    Quantum thermal effect of Dirac particles in an arbitrarily accelerating Kinnersley black hole is investigated by using the method of generalized tortoise coordinate transformation. Both the location and the temperature of the event horizon depend on the advanced time and the angles. The Hawking thermal radiation spectrum of Dirac particles contains a new term which represents the interaction between particles with spin and black holes with acceleration. This spin-acceleration coupling effect is absent from the thermal radiation spectrum of scalar particles.

  16. Hawking Radiation of an Arbitrarily Accelerating Kinnersley Black Hole: Spin-Acceleration Coupling Effect

    Institute of Scientific and Technical Information of China (English)

    吴双清; 闫沐霖

    2003-01-01

    The Hawking radiation of Weyl neutrinos in an arbitrarily accelerating Kinnersley black hole is investigated using a method of the generalized tortoise coordinate transformation.Both the location and temperature of the event horizon depend on the time and on the angles.They are in agreement with the previous results,but thethermal radiation spectrum of massless spinor particles displays a type of spin-acceleration coupling effect.

  17. Robustness of unstable attractors in arbitrarily sized pulse-coupled networks with delay

    International Nuclear Information System (INIS)

    We consider arbitrarily large networks of pulse-coupled oscillators with non-zero delay where the coupling is given by the Mirollo–Strogatz function. We prove that such systems have unstable attractors (saddle periodic orbits whose stable set has non-empty interior) in an open parameter region for three or more oscillators. The evolution operator of the system can be discontinuous and we propose an improved model with continuous evolution operator

  18. Calculation of pressure fields from arbitrarily shaped, apodized, and excited ultrasound transducers

    OpenAIRE

    Jensen, Jørgen Arendt; Svendsen, Niels Bruun

    1992-01-01

    A method for simulation of pulsed pressure fields from arbitrarily shaped, apodized and excited ultrasound transducers is suggested. It relies on the Tupholme-Stepanishen method for calculating pulsed pressure fields, and can also handle the continuous wave and pulse-echo case. The field is calculated by dividing the surface into small rectangles and then Summing their response. A fast calculation is obtained by using the far-field approximation. Examples of the accuracy of the approach and a...

  19. Hawking Radiation of Dirac Particles in an Arbitrarily Accelerating Kinnersley Black Hole

    OpenAIRE

    Wu, S Q; Cai, X.

    2002-01-01

    Quantum thermal effect of Dirac particles in an arbitrarily accelerating Kinnersley black hole is investigated by using the method of generalized tortoise coordinate transformation. Both the location and the temperature of the event horizon depend on the advanced time and the angles. The Hawking thermal radiation spectrum of Dirac particles contains a new term which represents the interaction between particles with spin and black holes with acceleration. This spin-acceleration coupling effect...

  20. Scattering of Bessel beam by arbitrarily shaped composite particles with core–shell structure

    International Nuclear Information System (INIS)

    This study investigates the scattering of Bessel beam by composite particles with core–shell structure. Specifically, the vector expressions of zero-th order Bessel beam that satisfy well Maxwell's equations in combination with the rotation Euler angles are used to represent the arbitrarily incident Bessel beams. An efficient numerical method based on surface integral equations is introduced to formulate the scattering problems involving arbitrarily shaped composite particles with core–shell structure. Solutions are performed iteratively by using the multilevel fast multipole algorithm. The numerical results for differential scattering cross sections of several selected composite particles are presented and analyzed. This investigation is expected to provide useful guidance for techniques of laser detection on particle, diagnosis, and manipulation. - Highlights: • The scattering of Bessel beam by composite particles is numerically investigated. • A detailed description of the arbitrarily incident Bessel beam is presented. • The surface integral equation method is used to solve the studied scattering problem. • The numerical results of several typical composite particles are presented

  1. TmPrime: fast, flexible oligonucleotide design software for gene synthesis

    OpenAIRE

    Bode, Marcus; Khor, Samuel; Ye, Hongye; Li, Mo-Huang; Ying, Jackie Y.

    2009-01-01

    Herein we present TmPrime, a computer program to design oligonucleotide sets for gene assembly by both ligase chain reaction (LCR) and polymerase chain reaction (PCR). TmPrime offers much flexibility with no constraints on the gene and oligonucleotide lengths. The program divides the long input DNA sequence based on the input desired melting temperature, and dynamically optimizes the length of oligonucleotides to achieve homologous melting temperatures. The output reports the melting temperat...

  2. Optical coding theory with Prime

    CERN Document Server

    Kwong, Wing C

    2013-01-01

    Although several books cover the coding theory of wireless communications and the hardware technologies and coding techniques of optical CDMA, no book has been specifically dedicated to optical coding theory-until now. Written by renowned authorities in the field, Optical Coding Theory with Prime gathers together in one volume the fundamentals and developments of optical coding theory, with a focus on families of prime codes, supplemented with several families of non-prime codes. The book also explores potential applications to coding-based optical systems and networks. Learn How to Construct

  3. Ovation Prime Real-Time

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Ovation Prime Real-Time (OPRT) product is a real-time forecast and nowcast model of auroral power and is an operational implementation of the work by Newell et...

  4. Psychotherapy augmentation through preconscious priming

    Directory of Open Access Journals (Sweden)

    Francois eBorgeat

    2013-03-01

    Full Text Available Objective: To test the hypothesis that repeated preconscious (masked priming of personalized positive cognitions could augment cognitive change and facilitate achievement of patients’ goals following a therapy.Methods: Twenty social phobic patients (13 women completed a 36 weeks study beginning by 12 weeks of group behavioural therapy. After the therapy, they received 6 weeks of preconscious priming and 6 weeks of a control procedure in a randomized cross-over design. The Priming condition involved listening twice daily with a passive attitude to a recording of individualized formulations of appropriate cognitions and attitudes masked by music. The Control condition involved listening to an indistinguishable recording where the formulations had been replaced by random numbers. Changes in social cognitions were measured by the Social Interaction Self Statements Test (SISST.Results: Patients improved following therapy. The Priming procedure was associated with increased positive cognitions and decreased negative cognitions on the SISST while the Control procedure was not. The Priming procedure induced more cognitive change when applied immediately after the group therapy. Conclusion: An effect of priming was observed on social phobia related cognitions in the expected direction. This self administered addition to a therapy could be seen as an augmentation strategy.

  5. Response Priming with More or Less Biological Movements as Primes.

    Science.gov (United States)

    Eckert, David; Bermeitinger, Christina

    2016-07-01

    Response priming in general is a suitable tool in cognitive psychology to investigate motor preactivations. Typically, compatibility effects reflect faster reactions in cases in which prime and target suggest the same response (i.e., compatible trials) compared with cases in which prime and target suggest opposite responses (i.e., incompatible trials). With moving dots that were horizontally aligned, Bermeitinger (2013) found a stable pattern of results: with short SOAs, faster responses in compatible trials were found; with longer SOAs up to 250 ms, faster responses in incompatible trials were found. It is unclear whether these results are specific to the special motion used therein or whether it generalizes to other motions. We therefore used other motions realized by arrangements of dots. In four experiments, we tested point-light displays (biological coherent walkers vs. less biological scrambled/split displays) as primes. In two experiments, eye gaze motions realized by moving dots representing irises and pupils (i.e., biological) versus the same motion either without surrounding face information or integrated in an abstract line drawing (i.e., less biological) were used. We found overall large positive compatibility effects with biological motion primes and also positive-but smaller-compatibility effects with less biological motion primes. Most important, also with very long SOAs (up to 1320 ms), we did not find evidence for negative compatibility effects. Thus, the pattern of positive-followed-by-negative-compatibility effects found in Bermeitinger (2013) seems to be specific to the materials used therein, whereas response priming in general seems an applicable tool to study motion perception. PMID:27150613

  6. What determines the direction of subliminal priming

    OpenAIRE

    Jaśkowski, Piotr; Verleger, Rolf

    2008-01-01

    Masked stimuli (primes) can affect the preparation of a motor response to subsequently presented target stimuli. Reactions to the target can be facilitated (straight priming) or inhibited (inverse priming) when preceded by a compatible prime (calling for the same response) and also when preceded by an incompatible prime. Several hypotheses are currently under debate. These are the self-inhibition (SI) hypothesis, the object-updating (OU) hypothesis, and mask-triggered inhibition (MTI) hypothe...

  7. The occurrence of prime numbers revisited

    OpenAIRE

    Ernesto Tapia Moore; José Tapia Yañez

    2016-01-01

    Based on an arithmetical and autocatalytic approach, the authors propose a solution for the occurrence of prime numbers. Exact arithmetical calculations are provided for: the closest prime to any given positive integer (or any number of bigger or smaller primes from that integer); the quantity of prime (and composite) numbers between 1 and any positive integer; the quantity of prime (and composite) numbers between any two positive integers.

  8. Boundary conditions for arbitrarily shaped and tightly focused laser pulses in electromagnetic codes

    Science.gov (United States)

    Thiele, Illia; Skupin, Stefan; Nuter, Rachel

    2016-09-01

    Investigation of laser matter interaction with electromagnetic codes requires to implement sources for the electromagnetic fields. A way to do so is to prescribe the fields at the numerical box boundaries in order to achieve the desired fields inside the numerical box. Here we show that the often used paraxial approximation can lead to unexpected field profiles with strong impact on the laser matter interaction results. We propose an efficient numerical algorithm to compute the required laser boundary conditions consistent with the Maxwell's equations for arbitrarily shaped, tightly focused laser pulses.

  9. Prestack reverse-time depth migration of arbitrarily wide-angle wave equations

    Institute of Scientific and Technical Information of China (English)

    HE Bing-shou; ZHANG Hui-xing; ZHANG Jing

    2008-01-01

    Based on arbitrarily wide-angle wave equations, a reverse-time propagation scheme is developed by substituting the partial derivatives of depth and time with central differences. The partial derivative of horizontal direction is replaced with high order difference. The imaging condition is computed by solving the eikonal equations. On the basis of above techniques, a prestack reverse-time depth migration algorithm is developed. The processing exam-ples of synthetic data show that the method can remove unwanted internal reflections and decrease the migration noise. The method also has the advantage of fidelity and is appficable of dip angle reflector imaging.

  10. A sharp interface immersed boundary method for solving flow with arbitrarily irregular and changing geometry

    CERN Document Server

    Mo, Huangrui; Zhang, Fan; Cronin, Duane S

    2016-01-01

    In this paper, a sharp interface immersed boundary method is developed for efficiently and robustly solving flow with arbitrarily irregular and changing geometries. The proposed method employs a three-step prediction-correction flow reconstruction scheme for boundary treatment and enforces Dirichlet, Neumann, Robin, and Cauchy boundary conditions in a straightforward and consistent manner. Numerical experiments concerning flow of two and three space dimensions, stationary and moving objects, convex and concave geometries, no-slip and slip wall boundary conditions are conducted to demonstrate the proposed method.

  11. Italy's Prime Minister visits CERN

    CERN Multimedia

    Stefania Pandolfi

    2015-01-01

    On Tuesday, 7 July 2015, the Prime Minister of the Italian Republic, Matteo Renzi, visited CERN. He was accompanied by a delegation that included Italy's Minister for Education, University and Research, Stefania Giannini.   From left to right: Fernando Ferroni, President of the Istituto Nazionale di Fisica Nucleare (INFN); Sergio Bertolucci, CERN Director for Research and Scientific Computing; Stefania Giannini, Italy's Minister of Education, University and Research; Matteo Renzi, Prime Minister of the Italian Republic; Fabiola Gianotti, CERN Director-General Designate; Rolf Heuer, CERN Director-General.   The Prime Minister was welcomed by members of the CERN Management together with former CERN Director-General and Senator for Life of the Italian Republic, Carlo Rubbia. After a brief general introduction to CERN’s activities by Rolf Heuer, the Italian delegation visited LHC Point 1. After a tour of the ATLAS control room, they donned helmets to visit th...

  12. Impact of Interference in Coexisting Wireless Networks with Applications to Arbitrarily Varying Bidirectional Broadcast Channels

    Directory of Open Access Journals (Sweden)

    Holger Boche

    2012-08-01

    Full Text Available The paradigm shift from an exclusive allocation of frequency bands, one for each system, to a shared use of frequencies comes along with the need of new concepts since interference will be an ubiquitous phenomenon. In this paper, we use the concept of arbitrarily varying channels to model the impact of unknown interference caused by coexisting wireless systems which operate on the same frequencies. Within this framework, capacity can be zero if pre-specified encoders and decoders are used. This necessitates the use of more sophisticated coordination schemes where the choice of encoders and decoders is additionally coordinated based on common randomness. As an application we study the arbitrarily varying bidirectional broadcast channel and derive the capacity regions for different coordination strategies. This problem is motivated by decode-and-forward bidirectional or two-way relaying, where a relay establishes a bidirectional communication between two other nodes while sharing the resources with other coexisting wireless networks.

  13. Instant PrimeFaces starter

    CERN Document Server

    Hlavats, Ian

    2013-01-01

    Get to grips with a new technology, understand what it is and what it can do for you, and then get to work with the most important features and tasks. Instant Primefaces Starter is a fast-paced, introductory guide designed to give you all the information you need to start using Primfaces, instantly.Instant PrimeFaces Starter is great for developers looking to get started quickly with PrimeFaces. It's assumed that you have some JSF experience already, as well as familiarity with other Java technologies such as CDI and JPA and an understanding of MVC principles, object-relational mapping (ORM),

  14. Prime Focus Instrument of Prime Focus Spectrograph for Subaru Telescope

    CERN Document Server

    Wang, Shiang-Yu; Schwochert, Mark A; Huang, Pin-Jie; Kimura, Masahiko; Chen, Hsin-Yo; Reiley, Dan J; Mao, Peter; Fisher, Charles D; Tamura, Naoyuki; Chang, Yin-Chang; Hu, Yen-Sang; Ling, Hung-Hsu; Wen, Chih-Yi; Chou, Richard C -Y; Takato, Naruhisa; Sugai, Hajime; Ohyama, Youichi; Karoji, Hiroshi; Shimono, Atsushi; Ueda, Akitoshi

    2014-01-01

    The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of the 8.2m Subaru telescope. PFS will cover 1.3 degree diameter field with 2394 fibers to complement the imaging capability of Hyper SuprimeCam (HSC). The prime focus unit of PFS called Prime Focus Instrument (PFI) provides the interface with the top structure of Subaru telescope and also accommodates the optical bench in which Cobra fiber positioners are located. In addition, the acquisition and guiding (A&G) cameras, the optical fiber positioner system, the cable wrapper, the fiducial fibers, illuminator, and viewer, the field element, and the telemetry system are located inside the PFI. The mechanical structure of the PFI was designed with special care such that its deflections sufficiently match those of the HSC Wide Field Corrector (WFC) so the fibers will stay on targets over the course of the observations within the required accuracy.

  15. De novo gene synthesis design using TmPrime software.

    Science.gov (United States)

    Li, Mo-Huang; Bode, Marcus; Huang, Mo Chao; Cheong, Wai Chye; Lim, Li Shi

    2012-01-01

    This chapter presents TmPrime, a computer program to design oligonucleotide for both ligase chain reaction (LCR)- and polymerase chain reaction (PCR)-based de novo gene synthesis. The program divides a long input DNA sequence based on user-specified melting temperatures and assembly conditions, and dynamically optimizes the length of oligonucleotides to achieve homologous melting temperatures. The output reports the melting temperatures, oligonucleotide sequences, and potential formation of secondary structures in a PDF file, which will be sent to the user via e-mail. The program also provides functions on sequence pooling to separate long genes into smaller pieces for multipool assembly and codon optimization for expression based on the highest organism-specific codon frequency. This software has been successfully used in the design and synthesis of various genes with total length >20 kbp. This program is freely available at http://prime.ibn.a-star.edu.sg. PMID:22328437

  16. Signal and noise in bridging PCR

    Directory of Open Access Journals (Sweden)

    Thaler David S

    2002-07-01

    Full Text Available Abstract Background In a variant of the standard PCR reaction termed bridging, or jumping, PCR the primer-bound sequences are originally on separate template molecules. Bridging can occur if, and only if, the templates contain a region of sequence similarity. A 3' end of synthesis in one round of synthesis that terminates in this region of similarity can prime on the other. In principle, Bridging PCR (BPCR can detect a subpopulation of one template that terminates synthesis in the region of sequence shared by the other template. This study considers the sensitivity and noise of BPCR as a quantitative assay for backbone interruptions. Bridging synthesis is also important to some methods for computing with DNA. Results In this study, BPCR was tested over a 328 base pair segment of the E. coli lac operon and a signal to noise ratio (S/N of approximately 10 was obtained under normal PCR conditions with Taq polymerase. With special precautions in the case of Taq or by using the Stoffel fragment the S/N was improved to 100, i.e. 1 part of cut input DNA yielded the same output as 100 parts of intact input DNA. Conclusions In the E. coli lac operator region studied here, depending on details of protocol, between 3 and 30% per kilobase of final PCR product resulted from bridging. Other systems are expected to differ in the proportion of product that is bridged consequent to PCR protocol and the sequence analyzed. In many cases physical bridging during PCR will have no informational consequence because the bridged templates are of identical sequence, but in a number of special cases bridging creates, or, destroys, information.

  17. Priming and Habituation for Faces: Individual Differences and Inversion Effects

    Science.gov (United States)

    Rieth, Cory A.; Huber, David E.

    2010-01-01

    Immediate repetition priming for faces was examined across a range of prime durations in a threshold identification task. Similar to word repetition priming results, short duration face primes produced positive priming whereas long duration face primes eliminated or reversed this effect. A habituation model of such priming effects predicted that…

  18. On primes in Lucas sequences

    Czech Academy of Sciences Publication Activity Database

    Křížek, Michal; Somer, L.

    2015-01-01

    Roč. 53, č. 1 (2015), s. 1-23. ISSN 0015-0517 R&D Projects: GA ČR GA14-02067S Institutional support: RVO:67985840 Keywords : Lucas sequence * primes Subject RIV: BA - General Math ematics http://www.fq. math .ca/Abstracts/53-1/somer.pdf

  19. Characteristic of Rings. Prime Fields

    Directory of Open Access Journals (Sweden)

    Schwarzweller Christoph

    2015-12-01

    Full Text Available The notion of the characteristic of rings and its basic properties are formalized [14], [39], [20]. Classification of prime fields in terms of isomorphisms with appropriate fields (ℚ or ℤ/p are presented. To facilitate reasonings within the field of rational numbers, values of numerators and denominators of basic operations over rationals are computed.

  20. External PCR, ASN's decision

    International Nuclear Information System (INIS)

    The French law imposes in some situations the presence of a person skilled in radiation protection (PCR). This article describes the cases when this person must belong to the staff of the enterprise or when this person may be sub-contracted. For instance in most nuclear facilities the PCR must be on the payroll, for enterprises dedicated to nuclear transport the PCR's job can be sub-contracted. A decision given by the ASN (French Nuclear Safety Authority) sets the minimal requests (in terms of training, job contract, activities) of the sub-contracted PCR. (A.C.)

  1. Character Sums Over The Prime Numbers

    OpenAIRE

    Carella, N. A.

    2012-01-01

    A few elementary estimates of a basic character sum over the prime numbers are derived here. These estimates are nontrivial for character sums modulo large q. In addition, an omega result for character sums over the primes is also included.

  2. Hawking radiation as tunnelling from arbitrarily dimensional Reissner-Nordstr(o)m de Sitter black hole

    Institute of Scientific and Technical Information of China (English)

    Jiang Qing-Quan; Yang Shu-Zheng; Wu Shuang-Qing

    2006-01-01

    This paper extends Parikh-Wilzcek's recent work, which treats the Hawking radiation as a semi-classical tunnelling process from the event horizon of four dimensional Schwarzshild and Reissner-Nordstr(o)m black holes, to that of arbitrarily dimensional Reissner-Nordstr(o)m de Sitter black hole. The result shows that the tunnelling rate is related to the change of Bekenstein-Hawking entropy and the factually radiant spectrum is no longer precisely thermal after taking the dynamical black hole background and energy conservation into account, but is consistent with the underlying unitary theory and then satisfies the first law of the black hole thermodynamics. Meanwhile, in Parikh-Wilzcek's framework, this paper points out that the information conservation is only suitable for the reversible process but in highly unstable evaporating black hole (irreversible process) the information loss is possible.

  3. Exploring arbitrarily high orders of optimized perturbation theory in QCD with nf -> 16.5

    CERN Document Server

    Stevenson, P M

    2016-01-01

    Perturbative QCD with nf flavours of massless quarks becomes simple in the hypothetical limit nf -> 16.5, where the leading beta-function coefficient vanishes. The Banks-Zaks (BZ) expansion in a0=(8/321)(16.5-nf) is straightforward to obtain from perturbative results in MSbar or any renormalization scheme (RS) whose nf dependence is `regular.' However, `irregular' RS's are perfectly permissible and should ultimately lead to the same BZ results. We show here that the `optimal' RS determined by the Principle of Minimal Sensitivity does yield the same BZ-expansion results when all orders of perturbation theory are taken into account. The BZ limit provides an arena for exploring optimized perturbation theory at arbitrarily high orders. These explorations are facilitated by a `master equation' expressing the optimization conditions in the fixed-point limit. We find an intriguing strong/weak coupling duality a -> a*^2/a about the fixed point a*.

  4. Optical quantum computing with photons of arbitrarily low fidelity and purity

    Science.gov (United States)

    Rohde, Peter P.

    2012-11-01

    Linear optics quantum computing (LOQC) is a leading candidate for the implementation of large scale quantum computers. Here quantum information is encoded into the quantum states of light and computation proceeds via a linear optics network. It is well known that in such schemes there are stringent requirements on the spatiotemporal structure of photons—they must be completely indistinguishable and of very high purity. We show that in the boson-sampling model for LOQC these conditions may be significantly relaxed. We present evidence that by increasing the size of the system we can implement a computationally hard algorithm even if our photons have arbitrarily low fidelity and purity. These relaxed conditions may make boson-sampling LOQC within reach of present-day technology.

  5. Invariant imbedding theory of wave propagation in arbitrarily inhomogeneous stratified bi-isotropic media

    CERN Document Server

    Kim, Seulong

    2016-01-01

    Bi-isotropic media, which include isotropic chiral media and Tellegen media as special cases, are the most general form of linear isotropic media where the electric displacement and the magnetic induction are related to both the electric field and the magnetic intensity. In inhomogeneous bi-isotropic media, electromagnetic waves of two different polarizations are coupled to each other. In this paper, we develop a generalized version of the invariant imbedding method for the study of wave propagation in arbitrarily-inhomogeneous stratified bi-isotropic media, which can be used to solve the coupled wave propagation problem accurately and efficiently. We verify the validity and usefulness of the method by applying it to several examples, including the wave propagation in a uniform chiral slab, the surface wave excitation in a bilayer system made of a layer of Tellegen medium and a metal layer, and the mode conversion of transverse electromagnetic waves into longitudinal plasma oscillations in inhomogeneous Telle...

  6. Geometrical Bell inequalities for arbitrarily many qudits with different outcome strategies

    International Nuclear Information System (INIS)

    Greenberger–Horne–Zeilinger (GHZ) states are intuitively known to be the most nonclassical ones. They lead to the most radically nonclassical behavior of three or more entangled quantum subsystems. In the case of two-dimensional systems, it has been shown that GHZ states lead to an exponentially higher robustness of Bell nonclassicality against the white noise for geometrical inequalities than in the case of Weinfurter–Werner–Wolf–Żukowski–Brukner ones. We introduce geometrical Bell inequalities for collections of arbitrarily many systems of any dimensionality. We show that the violation factor of these inequalities grows exponentially with the number of parties and study their behavior in terms of dimensionality of subsystems and number of local measurements. We also investigate various strategies of assigning mathematical objects to events in the experiment, each leading to different violation ratios. (paper)

  7. Determination of K-factors for arbitrarily shaped flaws at pressure vessel nozzle corners

    International Nuclear Information System (INIS)

    Photoelastic and finite element studies are being conducted to determine Mode I stress intensity factor distributions along arbitrarily shaped flaw fronts at pressure vessel nozzle corners. Comparisons of results from NOZ-FLAW, BIGIF, and the photoelastic studies showed that (1) good agreement was obtained between NOZ-FLAW and the photoelastically determined K1's for the deep flaw in an ITV model, (2) good agreement was obtained between NOZ-FLAW BIGIF for shallow and moderately deep flaws in a BWR model, and (3) less satisfactory agreement was obtained between NOZ- FLAW and the photoelastic results for the BWR models, particularly for moderately deep to deep flaws. Attempts are presently being made at understanding and explaining the discrepancies between the two

  8. Geometrical Bell inequalities for arbitrarily many qudits with different outcome strategies

    Science.gov (United States)

    Wieśniak, Marcin; Dutta, Arijit; Ryu, Junghee

    2016-01-01

    Greenberger-Horne-Zeilinger (GHZ) states are intuitively known to be the most nonclassical ones. They lead to the most radically nonclassical behavior of three or more entangled quantum subsystems. In the case of two-dimensional systems, it has been shown that GHZ states lead to an exponentially higher robustness of Bell nonclassicality against the white noise for geometrical inequalities than in the case of Weinfurter-Werner-Wolf-Żukowski-Brukner ones. We introduce geometrical Bell inequalities for collections of arbitrarily many systems of any dimensionality. We show that the violation factor of these inequalities grows exponentially with the number of parties and study their behavior in terms of dimensionality of subsystems and number of local measurements. We also investigate various strategies of assigning mathematical objects to events in the experiment, each leading to different violation ratios.

  9. Scattering of an anisotropic sphere by an arbitrarily incident Hermite-Gaussian beam

    Science.gov (United States)

    Qu, Tan; Wu, Zhensen; Shang, Qingchao; Li, Zhengjun; Bai, Lu; Li, Haiying

    2016-02-01

    An analytic theory for the scattering of an off-axis Hermite-Gaussian (HG) beam obliquely incident on an anisotropic sphere is developed. Based on the complex-source-point method and coordinate rotation theory, a general expansion expression for an arbitrarily incident HG beam in terms of Spherical Vector Wave Functions (SVWFs) is derived, and its convergence is numerically discussed. By introducing the Fourier transformation, the internal field expressions of the anisotropic sphere are represented. With the continuous tangential boundary conditions applied, the unknown scattering coefficients are solved. The theory and code are verified from the comparisons between the degenerated cases using our theory and those in the references. Two eigenmodes inside the uniaxial anisotropic sphere are characterized. The influences of beam mode, oblique incident angles, permittivity and permeability tensors, and sphere radius on the scattered field are analyzed numerically. The scattering intensity distributions on uniaxial anisotropic sphere in xoz and yoz plane are enantiomorphous for on-axis oblique illumination.

  10. Experimental scattering investigations and radiative transfer calculations of large arbitrarily shaped absorbing particles

    Science.gov (United States)

    Sasse, Christian

    1993-12-01

    Measured optical properties of large absorbing arbitrarily shaped particulates are compared to calculated optical properties of smooth homogeneous spheres. The particulates examined are spherical carbon particles with rough surface structure and oil shale. The results of measurements of phase functions of single particles at (lambda) equals 514.5 nm and hemispherical reflectance from 450 to 1959 nm are used in an inverse two-flux model to calculate the average albedo of a single particle. For carbon particles, ideal spheres show a higher forward scatter contribution than measured properties of rough spheres. Two types of oil shale particles with different optical properties but similar size and surface structure are investigated. Particle albedo and phase functions are compared, and the error of measuring the phase function at one wavelength is investigated. Results are also compared to isotropic scattering particles.

  11. Cut set-based risk and reliability analysis for arbitrarily interconnected networks

    Science.gov (United States)

    Wyss, Gregory D.

    2000-01-01

    Method for computing all-terminal reliability for arbitrarily interconnected networks such as the United States public switched telephone network. The method includes an efficient search algorithm to generate minimal cut sets for nonhierarchical networks directly from the network connectivity diagram. Efficiency of the search algorithm stems in part from its basis on only link failures. The method also includes a novel quantification scheme that likewise reduces computational effort associated with assessing network reliability based on traditional risk importance measures. Vast reductions in computational effort are realized since combinatorial expansion and subsequent Boolean reduction steps are eliminated through analysis of network segmentations using a technique of assuming node failures to occur on only one side of a break in the network, and repeating the technique for all minimal cut sets generated with the search algorithm. The method functions equally well for planar and non-planar networks.

  12. Cubic Spline Solutions of Nonlinear Bending and Buckling of Circular Plates with Arbitrarily Variable Thickness

    Institute of Scientific and Technical Information of China (English)

    侯朝胜; 李婧; 龙泉

    2003-01-01

    The cubic B-splines taken as trial function, the large deflection of a circular plate with arbitrarily variable thickness,as well as the buckling load, have been calculated by the method of point collocation. The support can be elastic. Loads imposed can be polynomial distributed loads, uniformly distributed radial forces or moments along the edge respectively or their combinations. Convergent solutions can still be obtained by this method under the load whose value is in great excess of normal one. Under the action of the uniformly distributed loads, linear solutions of circular plates with linearly or quadratically variable thickness are compared with those obtained by the parameter method. Buckling of a circular plate with identical thickness beyond critical thrust is compared with those obtained by the power series method.

  13. Diophantine Approximation with Two Primes and One Square of Prime

    Institute of Scientific and Technical Information of China (English)

    LI Wei-ping; WANG Tian-ze

    2012-01-01

    We show that if λ1,λ2,λ3 are non-zero real numbers,not all of the same sign,η is real and λ1/λ2 is irrational,then there are infinitely many ordered triples of primes (p1,p2,p3) for which |λ1p1 + λ2p2 + λ3P23 +η| < (maxpj)-1/40 (log maxpj)4.

  14. A method for robust segmentation of arbitrarily shaped radiopaque structures in cone-beam CT projections

    Energy Technology Data Exchange (ETDEWEB)

    Poulsen, Per Rugaard; Fledelius, Walther; Keall, Paul J.; Weiss, Elisabeth; Lu Jun; Brackbill, Emily; Hugo, Geoffrey D. [Department of Oncology, Aarhus University Hospital, Nr Brogade 44, 8000 Aarhus C (Denmark); Department of Radiation Oncology, Stanford University, Stanford, California 94305 (United States) and Sydney Medical School-Central, University of Sydney, NSW 2006 (Australia); Virginia Commonwealth University, Richmond, Virginia 23284 (United States)

    2011-04-15

    Purpose: Implanted markers are commonly used in radiotherapy for x-ray based target localization. The projected marker position in a series of cone-beam CT (CBCT) projections can be used to estimate the three dimensional (3D) target trajectory during the CBCT acquisition. This has important applications in tumor motion management such as motion inclusive, gating, and tumor tracking strategies. However, for irregularly shaped markers, reliable segmentation is challenged by large variations in the marker shape with projection angle. The purpose of this study was to develop a semiautomated method for robust and reliable segmentation of arbitrarily shaped radiopaque markers in CBCT projections. Methods: The segmentation method involved the following three steps: (1) Threshold based segmentation of the marker in three to six selected projections with large angular separation, good marker contrast, and uniform background; (2) construction of a 3D marker model by coalignment and backprojection of the threshold-based segmentations; and (3) construction of marker templates at all imaging angles by projection of the 3D model and use of these templates for template-based segmentation. The versatility of the segmentation method was demonstrated by segmentation of the following structures in the projections from two clinical CBCT scans: (1) Three linear fiducial markers (Visicoil) implanted in or near a lung tumor and (2) an artificial cardiac valve in a lung cancer patient. Results: Automatic marker segmentation was obtained in more than 99.9% of the cases. The segmentation failed in a few cases where the marker was either close to a structure of similar appearance or hidden behind a dense structure (data cable). Conclusions: A robust template-based method for segmentation of arbitrarily shaped radiopaque markers in CBCT projections was developed.

  15. A method for robust segmentation of arbitrarily shaped radiopaque structures in cone-beam CT projections

    International Nuclear Information System (INIS)

    Purpose: Implanted markers are commonly used in radiotherapy for x-ray based target localization. The projected marker position in a series of cone-beam CT (CBCT) projections can be used to estimate the three dimensional (3D) target trajectory during the CBCT acquisition. This has important applications in tumor motion management such as motion inclusive, gating, and tumor tracking strategies. However, for irregularly shaped markers, reliable segmentation is challenged by large variations in the marker shape with projection angle. The purpose of this study was to develop a semiautomated method for robust and reliable segmentation of arbitrarily shaped radiopaque markers in CBCT projections. Methods: The segmentation method involved the following three steps: (1) Threshold based segmentation of the marker in three to six selected projections with large angular separation, good marker contrast, and uniform background; (2) construction of a 3D marker model by coalignment and backprojection of the threshold-based segmentations; and (3) construction of marker templates at all imaging angles by projection of the 3D model and use of these templates for template-based segmentation. The versatility of the segmentation method was demonstrated by segmentation of the following structures in the projections from two clinical CBCT scans: (1) Three linear fiducial markers (Visicoil) implanted in or near a lung tumor and (2) an artificial cardiac valve in a lung cancer patient. Results: Automatic marker segmentation was obtained in more than 99.9% of the cases. The segmentation failed in a few cases where the marker was either close to a structure of similar appearance or hidden behind a dense structure (data cable). Conclusions: A robust template-based method for segmentation of arbitrarily shaped radiopaque markers in CBCT projections was developed.

  16. Figurate primes and Hilbert's 8th problem

    OpenAIRE

    Cai, Tianxin; Zhang, Yong; Shen, Zhongyan

    2014-01-01

    In this paper, by using the theory of elliptic curves, we discuss several Diophantine equations related with the so-called figurate primes. Meanwhile, we raise several conjectures related with figurate primes and Hilbert's 8th problem, including Goldbach's conjecture, twin primes conjecture and Catalan's conjecture as well.

  17. Affective priming with auditory speech stimuli

    NARCIS (Netherlands)

    J. Degner

    2011-01-01

    Four experiments explored the applicability of auditory stimulus presentation in affective priming tasks. In Experiment 1, it was found that standard affective priming effects occur when prime and target words are presented simultaneously via headphones similar to a dichotic listening procedure. In

  18. Inverse fusion PCR cloning.

    Directory of Open Access Journals (Sweden)

    Markus Spiliotis

    Full Text Available Inverse fusion PCR cloning (IFPC is an easy, PCR based three-step cloning method that allows the seamless and directional insertion of PCR products into virtually all plasmids, this with a free choice of the insertion site. The PCR-derived inserts contain a vector-complementary 5'-end that allows a fusion with the vector by an overlap extension PCR, and the resulting amplified insert-vector fusions are then circularized by ligation prior transformation. A minimal amount of starting material is needed and experimental steps are reduced. Untreated circular plasmid, or alternatively bacteria containing the plasmid, can be used as templates for the insertion, and clean-up of the insert fragment is not urgently required. The whole cloning procedure can be performed within a minimal hands-on time and results in the generation of hundreds to ten-thousands of positive colonies, with a minimal background.

  19. French Prime Minister tours CERN

    CERN Multimedia

    Anaïs Schaeffer

    2012-01-01

    On 30 July, Jean-Marc Ayrault, the Prime Minister of the French Republic, and Geneviève Fioraso, the Minister of Higher Education and Research, visited the Laboratory.   After being met by the Director-General at LHC Point 5, they visited the CMS control centre and experiment cavern, and got a glimpse of the LHC tunnel at Point 5. The visit ended with a round-table discussion with French and other international members of CERN’s scientific community. During the discussion, the Prime Minister reaffirmed that “support for fundamental research has to be maintained, and France must continue to invest in education, research and innovation.” He also paid tribute to CERN's role in international cooperation, which he qualified as “a fine example of science without borders.”

  20. Prime bound of a graph

    CERN Document Server

    Boussaïri, Abderrahim

    2011-01-01

    Given a graph G, a subset M of V (G) is a module of G if for each v \\in V (G) \\diagdownM, v is adjacent to all the elements of M or to none of them. For instance, V(G), \\varnothing and {v} (v \\in V(G)) are modules of G called trivial. Given a graph G, m(G) denotes the largest integer m such that there is a module M of G which is a clique or a stable set in G with |M|=m. A graph G is prime if |V(G)|\\geq4 and if all its modules are trivial. The prime bound of G is the smallest integer p(G) such that there is a prime graph H with V(H)\\supseteqV(G), H[V(G)] = G and |V(H)\\diagdownV(G)|=p(G). We establish the following. For every graph G such that m(G)\\geq2 and log_2(m(G)) is not an integer, p(G)=\\lceil log_2(m(G)) \\rceil. Then, we prove that for every graph G such that m(G)=2^k where k\\geq1, p(G)=k or k + 1. Moreover p(G)=k+1 if and only if G or its complement admits 2^k isolated vertices. Lastly, we show that p(G) = 1 for every non-prime graph G such that |V(G)|\\geq4 and m(G)=1.

  1. Short effective intervals containing primes

    OpenAIRE

    Kadiri, Habiba; Lumley, Allysa

    2014-01-01

    We prove that if $x$ is large enough, namely $x\\ge x_0$, then there exists a prime between $x(1- \\Delta^{-1})$ and $x$, where $\\Delta$ is an effective constant computed in terms of $x_0$. This improves some previous results of Ramar\\'e and Saouter and is used to verify the Ternary Goldbach Conjecture for the integers up to $7.86\\cdot 10^{27}$.

  2. Topics in prime number theory

    OpenAIRE

    Ghosh, Amit

    1981-01-01

    The thesis is divided into five sections: (a) Trigonometric sums involving prime numbers and applications, (b) Mean-values and Sign-changes of S(t)-- related to Riemann's Zeta function, (c) Mean-values of strongly additive arithmetical functions, (d) Combinatorial identities and sieves, (e) A Goldbach-type problem. Parts (b) and (c) are related by means of the techniques used but otherwise the sections are disjoint. (a) We consider the question of finding upper bounds for...

  3. A Conjecture Concerning Prime Numbers

    Directory of Open Access Journals (Sweden)

    Cătălin Angelo Ioan

    2015-04-01

    Full Text Available The paper examines the conditions under which a second degree polynomial generates primes variable values between 0 and the constant term - 1. It is shown that for values of the constant term equal to or less than 41, such polynomials exist and we are proposing a conjecture that for the polynomials with the constant term greather than 41 the statement is not true.

  4. Controllability, Bezoutian and relative primeness

    Directory of Open Access Journals (Sweden)

    B. N. Datta

    1980-03-01

    Full Text Available Let f(x and g(x be two polynomials of degree n. Then it is well-known that the Bezoutian matrix Bfg associated with f(x and g(x is nonsingular if and only if f(x and g(x are relatively prime. We give an alternative proof of this result. The proof is based on a result on controllability derived in this note.

  5. Real-Time PCR

    Science.gov (United States)

    Evrard, A.; Boulle, N.; Lutfalla, G. S.

    Over the past few years there has been a considerable development of DNA amplification by polymerase chain reaction (PCR), and real-time PCR has now superseded conventional PCR techniques in many areas, e.g., the quantification of nucleic acids and genotyping. This new approach is based on the detection and quantification of a fluorescent signal proportional to the amount of amplicons generated by PCR. Real-time detection is achieved by coupling a thermocycler with a fluorimeter. This chapter discusses the general principles of quantitative real-time PCR, the different steps involved in implementing the technique, and some examples of applications in medicine. The polymerase chain reaction (PCR) provides a way of obtaining a large number of copies of a double-stranded DNA fragment of known sequence. This DNA amplification technique, developed in 1985 by K. Mullis (Cetus Corporation), saw a spectacular development over the space of a few years, revolutionising the methods used up to then in molecular biology. Indeed, PCR has many applications, such as the detection of small amounts of DNA, cloning, and quantitative analysis (assaying), each of which will be discussed further below.

  6. Molecular diagnostic PCR handbook

    International Nuclear Information System (INIS)

    The uses of nucleic acid-directed methods have increased significantly in the past five years and have made important contributions to disease control country programmes for improving national and international trade. These developments include the more routine use of PCR as a diagnostic tool in veterinary diagnostic laboratories. However, there are many problems associated with the transfer and particularly, the application of this technology. These include lack of consideration of: the establishment of quality-assured procedures, the required set-up of the laboratory and the proper training of staff. This can lead to a situation where results are not assured. This book gives a comprehensive account of the practical aspects of PCR and strong consideration is given to ensure its optimal use in a laboratory environment. This includes the setting-up of a PCR laboratory; Good Laboratory Practice and standardised PCR protocols to detect animal disease pathogens. Examples of Standard Operating Procedures as used in individual specialist laboratories and an outline of training materials necessary for PCR technology transfer are presented. The difficulties, advantages and disadvantages in PCR applications are explained and placed in context with other test systems. Emphasis is placed on the use of PCR for detection of pathogens, with a particular focus on diagnosticians and scientists from the developing world. It is hoped that this book will enable readers from various disciplines and levels of expertise to better judge the merits of PCR and to increase their skills and knowledge in order to assist in a more logical, efficient and assured use of this technology

  7. Natural gas prime movers: A prime income opportunity?

    International Nuclear Information System (INIS)

    Although almost every factory, for example, uses compressed air to operate and control equipment--from power tools to packaging machinery--most air compressors are driven by electric motors. Similarly, although industry uses refrigeration for everything from freezing food to chilling warehouses to making chemicals and ice to operating skating rinks, natural gas powers only about 100 industrial refrigeration units in North America. But several factors are beginning to make natural gas more attractive as a prime mover. For one thing, the rising cost of electricity, with its demand or time-of-day and summer on-peak charges, has everyone looking for ways to cut their electric bills. At the same time, in the wake of deregulation of the nation's electric industry, customers can build on-site power plants that use natural gas to generate their own electricity, or have outside power suppliers or energy service companies (ESCOs) do it for them. Waste and exhaust heat, which can represent up to 60% of the total energy supplied from both engines and turbines, can be captured and used. Finally, growing concern over electric power outages has made natural gas more attractive for mission-critical operations, while new financing options let people buy and install natural gas prime movers more easily

  8. Diophantine equations in the primes

    Science.gov (United States)

    Cook, Brian; Magyar, Ákos

    2014-12-01

    Let $\\mathfrak{p}=(\\mathfrak{p}_1,...,\\mathfrak{p}_r)$ be a system of $r$ polynomials with integer coefficients of degree $d$ in $n$ variables $\\mathbf{x}=(x_1,...,x_n)$. For a given $r$-tuple of integers, say $\\mathbf{s}$, a general local to global type statement is shown via classical Hardy-Littlewood type methods which provides sufficient conditions for the solubility of $\\mathfrak{p}(\\mathbf{x})=\\mathbf{s}$ under the condition that each of the $x_i$'s is prime.

  9. Tomo-PIV measurement of flow around an arbitrarily moving body with surface reconstruction

    Science.gov (United States)

    Im, Sunghyuk; Jeon, Young Jin; Sung, Hyung Jin

    2015-02-01

    A three-dimensional surface of an arbitrarily moving body in a flow field was reconstructed using the DAISY descriptor and epipolar geometry constraints. The surface shape of a moving body was reconstructed with tomographic PIV flow measurement. Experimental images were captured using the tomographic PIV system, which consisted of four high-speed cameras and a laser. The originally captured images, which contained the shape of the arbitrary moving body and the tracer particles, were separated into the particle and surface images using a Gaussian smoothing filter. The weak contrast of the surface images was enhanced using a local histogram equalization method. The histogram-equalized surface images were used to reconstruct the surface shape of the moving body. The surface reconstruction method required a sufficiently detailed surface pattern to obtain the intensity gradient profile of the local descriptor. The separated particle images were used to reconstruct the particle volume intensity via tomographic reconstruction approaches. Voxels behind the reconstructed body surface were neglected during the tomographic reconstruction and velocity calculation. The three-dimensional three-component flow vectors were calculated based on the cross-correlation functions between the reconstructed particle volumes. Three-dimensional experiments that modeled the flows around a flapping flag, a rotating cylinder, and a flapping robot fish tail were conducted to validate the present technique.

  10. 3D time-domain airborne EM modeling for an arbitrarily anisotropic earth

    Science.gov (United States)

    Yin, Changchun; Qi, Yanfu; Liu, Yunhe

    2016-08-01

    Time-domain airborne EM data is currently interpreted based on an isotropic model. Sometimes, it can be problematic when working in the region with distinct dipping stratifications. In this paper, we simulate the 3D time-domain airborne EM responses over an arbitrarily anisotropic earth with topography by edge-based finite-element method. Tetrahedral meshes are used to describe the abnormal bodies with complicated shapes. We further adopt the Backward Euler scheme to discretize the time-domain diffusion equation for electric field, obtaining an unconditionally stable linear equations system. We verify the accuracy of our 3D algorithm by comparing with 1D solutions for an anisotropic half-space. Then, we switch attentions to effects of anisotropic media on the strengths and the diffusion patterns of time-domain airborne EM responses. For numerical experiments, we adopt three typical anisotropic models: 1) an anisotropic anomalous body embedded in an isotropic half-space; 2) an isotropic anomalous body embedded in an anisotropic half-space; 3) an anisotropic half-space with topography. The modeling results show that the electric anisotropy of the subsurface media has big effects on both the strengths and the distribution patterns of time-domain airborne EM responses; this effect needs to be taken into account when interpreting ATEM data in areas with distinct anisotropy.

  11. Invariant imbedding theory of wave propagation in arbitrarily inhomogeneous stratified bi-isotropic media

    Science.gov (United States)

    Kim, Seulong; Kim, Kihong

    2016-06-01

    Bi-isotropic media, which include isotropic chiral media and Tellegen media as special cases, are the most general form of linear isotropic media where the electric displacement and the magnetic induction are related to both the electric field and the magnetic intensity. In inhomogeneous bi-isotropic media, electromagnetic waves of two different polarizations are coupled to each other. In this paper, we develop a generalized version of the invariant imbedding method for the study of wave propagation in arbitrarily inhomogeneous stratified bi-isotropic media, which can be used to solve the coupled wave propagation problem accurately and efficiently. We verify the validity and usefulness of the method by applying it to several examples, including the wave propagation in a uniform chiral slab, the surface wave excitation in a bilayer system made of a layer of Tellegen medium and a metal layer, and the mode conversion of transverse electromagnetic waves into longitudinal plasma oscillations in inhomogeneous Tellegen media. In contrast to the case of ordinary isotropic media, we find that the surface wave excitation and the mode conversion occur for both s and p waves in bi-isotropic media.

  12. A Study of Force and Position Tracking Control for Robot Contact with an Arbitrarily Inclined Plane

    Directory of Open Access Journals (Sweden)

    Ye Bosheng

    2013-01-01

    Full Text Available This paper proposes an adaptive impedance control method for a robot’s end‐effector while it slides steadily on an arbitrarily inclined panel; it concentrates on robot force position tracking control for the inclined plane with an unknown normal direction and varying environmental damping and stiffness. The proposed control strategy uses the Recursive Least Squares (RLS algorithm to estimate environmental damping and stiffness parameters during the impact‐contact process between the robot and the environment. It achieves the expected posture adjustment of the robot’s end‐effector based on the measured contact torques and, during the robot’s end‐ effectorʹs sliding on the inclined plane, a fuzzy control is developed to adjust the robot impedance model parameters on‐line and adaptively for changes in environmental damping and stiffness. The designed robot force position control method is robust to the changes of the environmental parameters but the implementation of the proposed control algorithms is simple. Finally, experiments demonstrate the effectiveness of the proposed method.

  13. Positivity, discontinuity, finite resources, and nonzero error for arbitrarily varying quantum channels

    Energy Technology Data Exchange (ETDEWEB)

    Boche, H., E-mail: boche@tum.de, E-mail: janis.noetzel@tum.de; Nötzel, J., E-mail: boche@tum.de, E-mail: janis.noetzel@tum.de [Lehrstuhl für Theoretische Informationstechnik, Technische Universität München, 80290 München (Germany)

    2014-12-15

    This work is motivated by a quite general question: Under which circumstances are the capacities of information transmission systems continuous? The research is explicitly carried out on finite arbitrarily varying quantum channels (AVQCs). We give an explicit example that answers the recent question whether the transmission of messages over AVQCs can benefit from assistance by distribution of randomness between the legitimate sender and receiver in the affirmative. The specific class of channels introduced in that example is then extended to show that the unassisted capacity does have discontinuity points, while it is known that the randomness-assisted capacity is always continuous in the channel. We characterize the discontinuity points and prove that the unassisted capacity is always continuous around its positivity points. After having established shared randomness as an important resource, we quantify the interplay between the distribution of finite amounts of randomness between the legitimate sender and receiver, the (nonzero) probability of a decoding error with respect to the average error criterion and the number of messages that can be sent over a finite number of channel uses. We relate our results to the entanglement transmission capacities of finite AVQCs, where the role of shared randomness is not yet well understood, and give a new sufficient criterion for the entanglement transmission capacity with randomness assistance to vanish.

  14. Three-dimensional PIV measurement of flow around an arbitrarily moving body

    Energy Technology Data Exchange (ETDEWEB)

    Jeon, Young Jin; Sung, Hyung Jin [KAIST, Department of Mechanical Engineering, Daejeon (Korea, Republic of)

    2012-10-15

    A three-dimensional (3D) particle image velocimetry measurement technique capable of simultaneously monitoring 3D fluid flows and the structure of an arbitrarily moving surface embedded in the flow was proposed with a heavy emphasis on image processing methods. The costs associated with the experimental apparatus were reduced by recording the surface and the trace particles at one image plane without the use of additional cameras or illumination devices. An optimal exposure time for surface and particle imaging was identified using red fluorescent tracer particles in conjunction with a long-pass glass filter. The particle image and surface image were then separated using an image separation process that relied on the feature scaling differences between the particles and the surface texture. A feature detection process and a matching process facilitated estimation of the 3D surface points, and the 3D surface structure was modeled by Delaunay triangulation. The particle volume reconstruction algorithm constrained the voxels inside the surface structure to zero values to minimize ghost particle generation. Volume self-calibration was employed to improve the reconstruction quality and the triangulation accuracy. To conserve computing resources in the presence of numerous zero voxels, the MLOS-SMART reconstruction and the direct non-zero voxel cross-correlation method were applied. Three-dimensional experiments that modeled the flows around an eccentric rotating cylinder and a flapping flag were conducted to validate the present technique. (orig.)

  15. A two-level parallel direct search implementation for arbitrarily sized objective functions

    Energy Technology Data Exchange (ETDEWEB)

    Hutchinson, S.A.; Shadid, N.; Moffat, H.K. [Sandia National Labs., Albuquerque, NM (United States)] [and others

    1994-12-31

    In the past, many optimization schemes for massively parallel computers have attempted to achieve parallel efficiency using one of two methods. In the case of large and expensive objective function calculations, the optimization itself may be run in serial and the objective function calculations parallelized. In contrast, if the objective function calculations are relatively inexpensive and can be performed on a single processor, then the actual optimization routine itself may be parallelized. In this paper, a scheme based upon the Parallel Direct Search (PDS) technique is presented which allows the objective function calculations to be done on an arbitrarily large number (p{sub 2}) of processors. If, p, the number of processors available, is greater than or equal to 2p{sub 2} then the optimization may be parallelized as well. This allows for efficient use of computational resources since the objective function calculations can be performed on the number of processors that allow for peak parallel efficiency and then further speedup may be achieved by parallelizing the optimization. Results are presented for an optimization problem which involves the solution of a PDE using a finite-element algorithm as part of the objective function calculation. The optimum number of processors for the finite-element calculations is less than p/2. Thus, the PDS method is also parallelized. Performance comparisons are given for a nCUBE 2 implementation.

  16. Exploring arbitrarily high orders of optimized perturbation theory in QCD with nf → 161/2

    Science.gov (United States)

    Stevenson, P. M.

    2016-09-01

    Perturbative QCD with nf flavours of massless quarks becomes simple in the hypothetical limit nf → 161/2, where the leading β-function coefficient vanishes. The Banks-Zaks (BZ) expansion in a0 ≡8/321 (161/2 -nf) is straightforward to obtain from perturbative results in MS ‾ or any renormalization scheme (RS) whose nf dependence is 'regular'. However, 'irregular' RS's are perfectly permissible and should ultimately lead to the same BZ results. We show here that the 'optimal' RS determined by the Principle of Minimal Sensitivity does yield the same BZ-expansion results when all orders of perturbation theory are taken into account. The BZ limit provides an arena for exploring optimized perturbation theory at arbitrarily high orders. These explorations are facilitated by a 'master equation' expressing the optimization conditions in the fixed-point limit. We find an intriguing strong/weak coupling duality a →a*2 / a about the fixed point a*.

  17. Positivity, discontinuity, finite resources, and nonzero error for arbitrarily varying quantum channels

    International Nuclear Information System (INIS)

    This work is motivated by a quite general question: Under which circumstances are the capacities of information transmission systems continuous? The research is explicitly carried out on finite arbitrarily varying quantum channels (AVQCs). We give an explicit example that answers the recent question whether the transmission of messages over AVQCs can benefit from assistance by distribution of randomness between the legitimate sender and receiver in the affirmative. The specific class of channels introduced in that example is then extended to show that the unassisted capacity does have discontinuity points, while it is known that the randomness-assisted capacity is always continuous in the channel. We characterize the discontinuity points and prove that the unassisted capacity is always continuous around its positivity points. After having established shared randomness as an important resource, we quantify the interplay between the distribution of finite amounts of randomness between the legitimate sender and receiver, the (nonzero) probability of a decoding error with respect to the average error criterion and the number of messages that can be sent over a finite number of channel uses. We relate our results to the entanglement transmission capacities of finite AVQCs, where the role of shared randomness is not yet well understood, and give a new sufficient criterion for the entanglement transmission capacity with randomness assistance to vanish

  18. Useful intensity: A technique to identify radiating regions on arbitrarily shaped surfaces

    Science.gov (United States)

    Corrêa Junior, C. A.; Tenenbaum, R. A.

    2013-03-01

    This work presents a new technique for the computation of the numerical equivalent to the supersonic acoustic intensity, for arbitrarily shaped sound sources. The technique provides therefore the identification of the regions of a noise source that effectively contribute to the sound power radiated into the far field by filtering non-propagating sound waves. The proposed technique is entirely formulated on the vibrating surface. The radiated acoustic power is obtained through a numerical operator that relates it with the superficial normal velocity distribution. The power operator is obtained by using the boundary element method. Such operator, possesses the property of being Hermitian. The advantage of this characteristic is that it has real eigenvalues and their eigenvectors form an orthonormal set for the velocity distribution. It is applied to the power operator the decomposition in eigenvalues and eigenvectors, becoming possible to compute the numerical equivalent to the supersonic intensity, called here as useful intensity, after applying a cutoff criterion to remove the non-propagating components. Some numerical tests confirming the effectiveness of the convergence criterion are presented. Examples of the application of the useful intensity technique in vibrating surfaces such as a plate, a cylinder with flat caps and an automotive muffler are presented and the numerical results are discussed.

  19. Three-dimensional acoustic radiation force on an arbitrarily located elastic sphere.

    Science.gov (United States)

    Baresch, Diego; Thomas, Jean-Louis; Marchiano, Régis

    2013-01-01

    This work aims to model the acoustic radiation forces acting on an elastic sphere placed in an inviscid fluid. An expression of the axial and transverse forces exerted on the sphere is derived. The analysis is based on the scattering of an arbitrary acoustic field expanded in the spherical coordinate system centered on the spherical scatterer. The sphere is allowed to be arbitrarily located. The special case of high order Bessel beams, acoustical vortices, are considered. These types of beams have a helicoidal wave front, i.e., a screw-type phase singularity and hence, the beam has a central dark core of zero amplitude surrounded by an intense ring. Depending on the sphere's radius, different radial equilibrium positions may exist and the sphere can be set in rotation around the beam axis by an azimuthal force. This confirms the pseudo-angular moment transfer from the beam to the sphere. Cases where the axial force is directed opposite to the direction of the beam propagation are investigated and the potential use of Bessel beams as tractor beams is demonstrated. Numerical results provide an impetus for further designing acoustical tweezers for potential applications in particle entrapment and remote controlled manipulation. PMID:23297880

  20. Electromagnetic scattering from two parallel 2D targets arbitrarily located in a Gaussian beam

    Institute of Scientific and Technical Information of China (English)

    Wang Yun-Hua; Guo Li-Xin; Wu Qiong

    2006-01-01

    In this paper based on the equivalence principle and the reciprocity theorem, the scattered field up to second-order by two parallel 2D targets arbitrarily located in a Gaussian beam is considered. The first-order solution can easily be obtained by calculating the scattered field from isolated targets when illuminated by a Gaussian beam. However, because of the difficulty in formulating the couple scattering field, it is almost impossible to find an analytical solution for the second-order scattered field if the shapes of 2D targets are not canonical geometries. In order to overcome this problem, in this paper, the second-order solution is derived by using the technique based on the reciprocity theorem and the equivalence principle. Meanwhile, the relation between the secondary scattered field from target #1 and target #2 is obtained. Specifically, the bi- and mono-static scattering of Gaussian beam by two parallel adjacent inhomogeneous plasma-coated conducting circular cylinders is calculated and the dependence of attenuation of the scattering width on the thickness of the coated layer, electron number density, collision frequency and radar frequency is discussed in detail.

  1. Priming of antiherbivore defensive responses in plants

    Institute of Scientific and Technical Information of China (English)

    Jinwon Kim; Gary W.Felton

    2013-01-01

    Defense priming is defined as increased readiness of defense induction.A growing body of literature indicates that plants (or intact parts of a plant) are primed in anticipation of impending environmental stresses,both biotic and abiotic,and upon the following stimulus,induce defenses more quickly and strongly.For instance,some plants previously exposed to herbivore-inducible plant volatiles (HIPVs) from neighboring plants under herbivore attack show faster or stronger defense activation and enhanced insect resistance when challenged with secondary insect feeding.Research on priming of antiherbivore defense has been limited to the HIPV-mediated mechanism until recently,but significant advances were made in the past three years,including non-HIPV-mediated defense priming,epigenetic modifications as the molecular mechanism of priming,and others.It is timely to consider the advances in research on defense priming in the plantinsect interactions.

  2. A short hand of Prime number distribution

    Directory of Open Access Journals (Sweden)

    Vinoo Cameron

    2012-11-01

    Full Text Available This is a short paper to demonstrate how complacent scientists and mathematicians have been and how complacent the mysteries of the sciences are (actually there are no mysteries, the almighty has made mathematics and the sciences in our image .This is simple mathematics, including the mathematics of the unified theorem that follows this paper, that mathematicians have botched for 500 years. This is also made possible by a unique prime number sieve that is continuum at 6 and 1:3, the denOtter- Hope research continuous sieve for prime numbers, the most accurate prime number sieve. Whilst the discovery of large prime number does nothing for the understanding of prime numbers, the short hand does. We have presented a short series and if so called mathematicians cannot extend the series mathematically, they should join a historical line of western mathematicians that convoluted the reality of mathematics on prime numbers for 500 years. 

  3. Can Faces Prime a Language?

    Science.gov (United States)

    Woumans, Evy; Martin, Clara D; Vanden Bulcke, Charlotte; Van Assche, Eva; Costa, Albert; Hartsuiker, Robert J; Duyck, Wouter

    2015-09-01

    Bilinguals have two languages that are activated in parallel. During speech production, one of these languages must be selected on the basis of some cue. The present study investigated whether the face of an interlocutor can serve as such a cue. Spanish-Catalan and Dutch-French bilinguals were first familiarized with certain faces, each of which was associated with only one language, during simulated Skype conversations. Afterward, these participants performed a language production task in which they generated words associated with the words produced by familiar and unfamiliar faces displayed on-screen. When responding to familiar faces, participants produced words faster if the faces were speaking the same language as in the previous Skype simulation than if the same faces were speaking a different language. Furthermore, this language priming effect disappeared when it became clear that the interlocutors were actually bilingual. These findings suggest that faces can prime a language, but their cuing effect disappears when it turns out that they are unreliable as language cues. PMID:26209531

  4. On Anti-Elite Prime Numbers

    Science.gov (United States)

    M"Uller, Tom

    2007-09-01

    An odd prime number p is called anti-elite if only finitely many Fermat numbers are quadratic non-residues to p. This concept is the exact opposite to that of elite prime numbers. We study some fundamental properties of anti-elites and show that there are infinitely many of them. A computational search among all the numbers up to 100 billion yielded 84 anti-elite primes.

  5. All Elite Primes Up to 250 Billion

    Science.gov (United States)

    Chaumont, Alain; Müller, Tom

    2006-08-01

    A prime number p is called elite if only finitely many Fermat numbers 2^(2^n)+1 are quadratic residues of p. Previously only the interval up to 10^9 was systematically searched for elite primes and 16 such primes were found. We extended this research up to 2.5*10^11 and found five further elites, among which 1,151,139,841 is the smallest and 171,727,482,881 the largest.

  6. Priming lexical stress in reading Italian aloud.

    OpenAIRE

    Sulpizio, Simone; Job, Remo; Burani, Cristina

    2012-01-01

    Two naming experiments using lexical priming were conducted to investigate how stress information is processed in reading Italian aloud. In the experiments, word primes and targets either shared the stress pattern, or they had different stress patterns. The hypothesis was that lexical activation of the prime would favor the assignment of a congruent stress to the target word. Results show that participants were faster in naming low-frequency target words that had the same stress pattern as th...

  7. Prime number generation and factor elimination

    OpenAIRE

    Kumar, Vineet

    2014-01-01

    We have presented a multivariate polynomial function termed as factor elimination function,by which, we can generate prime numbers. This function's mapping behavior can explain the irregularities in the occurrence of prime numbers on the number line. Generally the different categories of prime numbers found till date, satisfy the form of this function. We present some absolute and probabilistic conditions for the primality of the number generated by this method. This function is capable of le...

  8. Negative Priming in Free Recall Reconsidered

    OpenAIRE

    Hanczakowski, Maciej; Beaman, C. Philip; Jones, Dylan M.

    2015-01-01

    Negative priming in free recall is the finding of impaired memory performance when previously ignored auditory distracters become targets of encoding and retrieval. This negative priming has been attributed to an aftereffect of deploying inhibitory mechanisms that serve to suppress auditory distraction and minimize interference with learning and retrieval of task-relevant information. In 6 experiments, we tested the inhibitory account of the effect of negative priming in free recall against a...

  9. Can false memories prime problem solutions?

    OpenAIRE

    Howe, M. L.; Garner, S. R.; Dewhurst, S; Ball, L. J.

    2010-01-01

    Previous research has suggested that false memories can prime performance on related implicit and explicit memory tasks. The present research examined whether false memories can also be used to prime higher order cognitive processes, namely, insight-based problem solving. Participants were asked to solve a number of compound remote associate task (CRAT) problems, half of which had been primed by the presentation of Deese/Roediger-McDermott (DRM) lists whose critical lure was also the solution...

  10. Overlap extension PCR cloning.

    Science.gov (United States)

    Bryksin, Anton; Matsumura, Ichiro

    2013-01-01

    Rising demand for recombinant proteins has motivated the development of efficient and reliable cloning methods. Here we show how a beginner can clone virtually any DNA insert into a plasmid of choice without the use of restriction endonucleases or T4 DNA ligase. Chimeric primers encoding plasmid sequence at the 5' ends and insert sequence at the 3' ends are designed and synthesized. Phusion(®) DNA polymerase is utilized to amplify the desired insert by PCR. The double-stranded product is subsequently employed as a pair of mega-primers in a PCR-like reaction with circular plasmids. The original plasmids are then destroyed in restriction digests with Dpn I. The product of the overlap extension PCR is used to transform competent Escherichia coli cells. Phusion(®) DNA polymerase is used for both the amplification and fusion reactions, so both steps can be monitored and optimized in the same way. PMID:23996437

  11. Arbitrarily amplified DNA: New molecular approaches to plant breeding, ecology and evolution

    International Nuclear Information System (INIS)

    Several DNA fingerprinting techniques that use arbitrary primers to characterize, scan and tag genomic DNA were optimized and used to study plants and microbial pathogens. The generated arbitrarily amplified DNA (AAD) profiles could be tailored in their complexity and polymorphic content, allowing analysis of closely related organisms, such as vegetatively-propagated horticultural crops or clonal fungal populations. AAD markers were used in cultivar and strain identification, map-based cloning, and marker-assisted breeding, sometimes as sequence-tagged sites. Phenetic analysis using parsimony, cluster, and numerical methods was applied successfully to the identification of genetic relationships in turfgrass species such as bermudagrass, woody plants such as dogwoods, and floricultural species such as petunia and chrysanthemum. AAD profiles were used to measure for the first time a genome-wide mutation rate, directly in a plant. Mutation rates in vegetatively propagated bermudagrass were comparable to those in human, mice, fruit flies, and worms. In combination with established tools used in molecular systematics (e.g. rDNA sequence analysis), AAD markers tracked the introduction of exotic dogwood anthracnose-causing fungi in North America. As part of a breeding effort to combat dogwood diseases, AAD was used in pseudo-testcross mapping of the tree at the intra-specific level. Markers were efficiently generated despite the close relatedness of parental dogwood material. Finally, DNA markers and tags were also generated in soybean, and were used to construct high density maps and walk towards defined genomic regions in the positional cloning of the supernodulation nts-1 symbiotic gene. (author)

  12. Development of Numerical Method for Two-phase Flows on Three-dimensional Arbitrarily-shaped Polyhedral Meshes

    Science.gov (United States)

    Suzuki, Kohei; Omori, Takesi; Kajishima, Takeo

    2014-11-01

    Although the advantage of using arbitrarily-shaped polyhedral meshes for the industrial flow applications is clear, their employment to two-phase flows is rather limited due to the poor prediction accuracy of the existing numerical methods on such meshes. We present a numerical method based on VOF (Volume of Fluid) method which works on arbitrarily-shaped three-dimensional polyhedral meshes with little volume/shape error for the interface advection and with little curvature estimation error. To make the implementation in three-dimensional geometry feasible, we extend THINC (Tangent of Hyperbola Interface Capturing) method for polyhedral meshes which does not require laborious geometric arithmetics. In the oral presentation we will also show that the combination of RDF (Reconstructed Distance Function) algorithm and the carefully selected discretization procedure gives good performance in the interface curvature estimation.

  13. Unconscious Congruency Priming from Unpracticed Words Is Modulated by Prime-Target Semantic Relatedness

    Science.gov (United States)

    Ortells, Juan J.; Mari-Beffa, Paloma; Plaza-Ayllon, Vanesa

    2013-01-01

    Participants performed a 2-choice categorization task on visible word targets that were preceded by novel (unpracticed) prime words. The prime words were presented for 33 ms and followed either immediately (Experiments 1-3) or after a variable delay (Experiments 1 and 4) by a pattern mask. Both subjective and objective measures of prime visibility…

  14. Comparative Transcriptional Profiling of Primed and Non-primed Rice Seedlings under Submergence Stress

    Science.gov (United States)

    Hussain, Saddam; Yin, Hanqi; Peng, Shaobing; Khan, Faheem A.; Khan, Fahad; Sameeullah, Muhammad; Hussain, Hafiz A.; Huang, Jianliang; Cui, Kehui; Nie, Lixiao

    2016-01-01

    Submergence stress is a limiting factor for direct-seeded rice systems in rainfed lowlands and flood-prone areas of South and Southeast Asia. The present study demonstrated that submergence stress severely hampered the germination and seedling growth of rice, however, seed priming alleviated the detrimental effects of submergence stress. To elucidate the molecular basis of seed priming-induced submergence tolerance, transcriptome analyses were performed using 4-day-old primed (selenium-Se and salicylic acid-SA priming) and non-primed rice seedlings under submergence stress. Genomewide transcriptomic profiling identified 2371 and 2405 transcripts with Se- and SA-priming, respectively, that were differentially expressed in rice compared with non-priming treatment under submergence. Pathway and gene ontology term enrichment analyses revealed that genes involved in regulation of secondary metabolism, development, cell, transport, protein, and metal handling were over-represented after Se- or SA-priming. These coordinated factors might have enhanced the submergence tolerance and maintained the better germination and vigorous seedling growth of primed rice seedlings. It was also found that many genes involved in cellular and metabolic processes such as carbohydrate metabolism, cellular, and metabolic biosynthesis, nitrogen compound metabolic process, transcription, and response to oxidative stress were induced and overlapped in seed priming treatments, a finding which reveals the common mechanism of seed priming-induced submergence tolerance. Taken together, these results may provide new avenues for understanding and advancing priming-induced responses to submergence tolerance in crop plants. PMID:27516766

  15. CAD of complex passive devices composed of arbitrarily shaped waveguides using Nyström and BI-RME methods

    OpenAIRE

    Taroncher Calduch, Máriam; Vidal Pantaleoni, Ana; Boria Esbert, Vicente Enrique; MARINI, STEPHAN; Cogollos Borras, Santiago; GIL RAGA, JORDI; Gimeno Martínez, Benito

    2004-01-01

    In this paper, a novel computer-aided design (CAD) tool of complex passive microwave devices in waveguide technology is proposed. Such a tool is based on a very efficient integral-equation analysis technique that provides a full-wave characterization of discontinuities between arbitrarily shaped waveguides defined by linear, circular, and/or elliptical arcs. For solving the modal analysis of such arbitrary waveguides, a modified version of the well-known boundary integral-resonant-mode expans...

  16. Light scattering by a cluster consisting of homogeneous axisymmetric particles illuminated with an arbitrarily focused electromagnetic Gaussian beam

    Science.gov (United States)

    Ibrahim, Hany L. S.; Wriedt, Thomas; Khaled, Elsayed Esam M.

    2016-04-01

    Scattering of an arbitrarily focused electromagnetic Gaussian beam by a chain cluster consisting of axisymmetric particles is presented. The illustrated technique in this paper combines the plane-waves spectrum method and the cluster T-matrix calculation technique. This combination provides a powerful mathematical and numerical tool to solve such types of scattering problems. Computed results are shown for different particles shapes in the cluster and for different beam focusing.

  17. Pure Mediated Priming: A Retrospective Semantic Matching Model

    Science.gov (United States)

    Jones, Lara L.

    2010-01-01

    Mediated priming refers to the activation of a target (e.g., "stripes") by a prime (e.g., "lion") that is related indirectly via a connecting mediator (e.g., tiger). In previous mediated priming studies (e.g., McNamara & Altarriba, 1988), the mediator was associatively related to the prime. In contrast, pure mediated priming (e.g., "spoon" [right…

  18. 7 CFR 29.2290 - Premature primings.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Premature primings. 29.2290 Section 29.2290 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards... 21) § 29.2290 Premature primings. Ground leaves harvested before reaching complete growth...

  19. Multi-Prime RSA Over Galois Approach

    OpenAIRE

    Rawal, Swati

    2016-01-01

    Many variants of RSA cryptosystem exist in the literature. One of them is RSA over polynomials based on Galois approach. In standard RSA modulus is product of two large primes whereas in the Galois approach author considered the modulus as a product of two irriduciable polynomials. We use this idea and extend Multi-prime RSA over polynomials.

  20. Explicit Estimate on Primes between Consecutive Cubes

    OpenAIRE

    Cheng, Yuanyou Furui

    2008-01-01

    We give an explicit form of Ingham's Theorem on primes in the short intervals, and show that there is at least one prime between every two consecutive cubes $x\\sp{3}$ and $(x+1)\\sp{3}$ if $\\log\\log x\\ge 15$.

  1. A Generalization of the Prime Number Theorem

    Science.gov (United States)

    Bruckman, Paul S.

    2008-01-01

    In this article, the author begins with the prime number theorem (PNT), and then develops this into a more general theorem, of which many well-known number theoretic results are special cases, including PNT. He arrives at an asymptotic relation that allows the replacement of certain discrete sums involving primes into corresponding differentiable…

  2. Toward a dynamical model for prime numbers

    OpenAIRE

    Bonanno, Claudio; Mega, Mirko S.

    2003-01-01

    We show one possible dynamical approach to the study of the distribution of prime numbers. Our approach is based on two complexity methods, the Computable Information Content and the Entropy Information Gain, looking for analogies between the prime numbers and intermittency.

  3. Can False Memories Prime Problem Solutions?

    Science.gov (United States)

    Howe, Mark L.; Garner, Sarah R.; Dewhurst, Stephen A.; Ball, Linden J.

    2010-01-01

    Previous research has suggested that false memories can prime performance on related implicit and explicit memory tasks. The present research examined whether false memories can also be used to prime higher order cognitive processes, namely, insight-based problem solving. Participants were asked to solve a number of compound remote associate task…

  4. Negative Priming in Free Recall Reconsidered

    Science.gov (United States)

    Hanczakowski, Maciej; Beaman, C. Philip; Jones, Dylan M.

    2016-01-01

    Negative priming in free recall is the finding of impaired memory performance when previously ignored auditory distracters become targets of encoding and retrieval. This negative priming has been attributed to an aftereffect of deploying inhibitory mechanisms that serve to suppress auditory distraction and minimize interference with learning and…

  5. Priming analogical reasoning with false memories.

    Science.gov (United States)

    Howe, Mark L; Garner, Sarah R; Threadgold, Emma; Ball, Linden J

    2015-08-01

    Like true memories, false memories are capable of priming answers to insight-based problems. Recent research has attempted to extend this paradigm to more advanced problem-solving tasks, including those involving verbal analogical reasoning. However, these experiments are constrained inasmuch as problem solutions could be generated via spreading activation mechanisms (much like false memories themselves) rather than using complex reasoning processes. In three experiments we examined false memory priming of complex analogical reasoning tasks in the absence of simple semantic associations. In Experiment 1, we demonstrated the robustness of false memory priming in analogical reasoning when backward associative strength among the problem terms was eliminated. In Experiments 2a and 2b, we extended these findings by demonstrating priming on newly created homonym analogies that can only be solved by inhibiting semantic associations within the analogy. Overall, the findings of the present experiments provide evidence that the efficacy of false memory priming extends to complex analogical reasoning problems. PMID:25784574

  6. Application of cross-priming amplification (CPA) for detection of fowl adenovirus (FAdV) strains

    OpenAIRE

    Niczyporuk, Jowita Samanta; Woźniakowski, Grzegorz; Samorek-Salamonowicz, Elżbieta

    2015-01-01

    Fowl adenoviruses (FAdVs) are widely distributed among chickens. Detection of FAdVs is mainly accomplished by virus isolation, serological assays, various polymerase chain reaction (PCR) assays, and loop-mediated isothermal amplification (LAMP). To increase the diagnostic capacity of currently applied techniques, cross-priming amplification (CPA) for the detection of the FAdV hexon gene was developed. The single CPA assay was optimised to detect all serotypes 1-8a-8b-11 representing the speci...

  7. Exponential sums over primes in short intervals

    Institute of Scientific and Technical Information of China (English)

    LIU; Jianya

    2006-01-01

    [1]Vinogradov,I.M.,Estimation of certain trigonometric sums with prime variables,Izv.Acad.Nauk.SSSR,1939,3:371-398.[2]Zhan,T.,On the representation of large odd integer as a sum of three almost equal primes,Acta Math.Sin.,1991,7:259-272.[3]Ren,X.M.,On exponential sums over primes and application in the Waring-Goldbach problem,Sci.China,Ser.A-Math.,2005,48(6):785-797.[4]Liu,J.Y.,Wooley,T.D.,Yu,G.,The quadratic Waring-Goldbach problem,J.Number Theory,2004,107:298-321.[5]Hua,L.K.,Some results in the additive prime number theory,Quart.J.Math.(Oxford),1938,9:68-80.[6]Liu,J.Y.,Zhan,T.,On sums of five almost equal prime squares,Acta Arith.,1996,77:369-383.[7]Bauer,C.,A note on sums of five almost equal prime squares,Arch.Math,1997,69:20-30.[8]Liu,J.Y.,Zhan,T.,Sums of five almost equal prime squares,Science in China,Ser.A,1998,41:710-722.[9]Liu,J.Y.,Zhan,T.,Hua's theorem on prime squares in short intervals,Acta Math.Sin.,2000,16:1-22.[10]Bauer,C.,Sums of five almost equal prime squares,Acta Math.Sin.,2005,21(4):833-840.[11]Lü,G.S.,Hua's Theorem with five almost equal prime variables,Chin.Ann.Math.,Ser.B,2005,26(2):291-304.[12]Vinogradov,I.M.,Elements of Number Theory,Dover Publications,1954.[13]Titchmarsh,E.C.,The Theory of the Riemann Zeta-function,2nd ed.,Oxford:Oxford University Press,1986.

  8. Análisis de variabilidad genética en Moniliophthora roreri con AP-PCR y RAPD en Antioquia, Colombia Analysis of genetic variability in Moniliophthora roreri with AP-PCR and RAPD in Antioquia, Colombia

    Directory of Open Access Journals (Sweden)

    Afanador Kafuri Lucía

    2007-12-01

    Full Text Available Moniliophthora roreri es el agente causante de la moniliasis del cacao, la enfermedad más severa en las plantaciones de cacao en el departamento de Antioquia, Colombia. Los marcadores moleculares RAPD (Random Amplyfied Polymorphism of DNA y AP-PCR (Arbitraly Primed Polymerase Chain Reaction fueron usados para estudiar la variabilidad genética de 170 aislamientos de M. roreri colectados en doce municipios de Antioquia. El análisis dividió la población en seis grupos, el grupo G1 fue el más grande y contenía el 95% de los aislamientos con una alta similitud genética (coeficiente de similitud de 0,7 a 1, mientras los otros cinco grupos contenían solo aislamientos de Apartadó y Dabeiba con una similitud genética moderadamente baja (coeficiente de similitud entre 0,45 a 0,55. El análisis de componentes principales mostró una alta similitud genética entre la población excepto entre los aislamientos de Apartadó y Dabeiba, que registraron los más altos niveles de variabilidad genética con valores altos del índice de Shannon y el porcentaje de loci polimórficos, mientras los otros aislamientos registraron una baja variabilidad genética. Los valores de diversidad y diferenciación genética en la población muestran una introducción reciente de M. roreri en las plantaciones de cacao de Antioquia, y una reproducción predominantemente clonal en la población. De acuerdo con Amova, la mayoría de la variación genética se encontró dentro de los municipios (75,68% con solo un 5,94% presente entre las subregiones.Moniliophthora roreri is the causal agent of moniliasis in cocoa, the most severe disease affecting cocoa plantations in the Antioquia department in Colombia. RAPD (random amplified polymorphism of DNA and AP-PCR (arbitrarily-primed polymerase chain reaction molecular markers were used for studying the genetic variability of 170 M. roreri isolates collected from twelve municipalities in Antioquia. Cluster analysis divided the

  9. Evaluation of PCR and multiplex PCR in relation to nested PCR for diagnosing Theileria equi

    Directory of Open Access Journals (Sweden)

    Danielle C. Leal

    2011-07-01

    Full Text Available Conventional PCR (PCRTeq for diagnosing Theileria equi and multiplex PCR (M/PCRTeq-Bc for diagnosing T. equi and Babesia caballi were comparatively evaluated with nested PCR (N/PCR-Teq for diagnosing equine piroplasmosis. In DNA sensitivity determinations, in multiple dilutions of equine blood that had tested positive for T. equi, PCR-Teq and N/PCR-Teq detected hemoparasite DNA in the larger dilutions (1:128, but did not differ significantly from the M/PCRTeq-Bc (1:64. In analyses on equine serum tested by ELISA, there was high agreement between this serological test and PCR-Teq (k = 0.780 and moderate agreement with N/PCR-Teq (k = 0.562 and M/PCRTeq-Bc (k = 0.488. PCR-Teq found a higher frequency of T. equi both in extensively and intensively reared horses, but this was not significant in relation to N/PCR-Teq (P>0.05, and both PCRs indicated that there was an endemic situation regarding T. equi in the population of horses of this sample. PCR-Teq was only significantly different from M/PCR-Teq-Bc (P<0.05. PCR-Teq presented high sensitivity and specificity, comparable to N/PCR-Teq, but with the advantage of higher speed in obtaining results and lower costs and risks of laboratory contamination. This accredits PCR-Teq for epidemiological studies and for determinations on affected horses.

  10. Colony screening by PCR

    OpenAIRE

    sprotocols

    2014-01-01

    Author: Matt Lewis ### Notes This is the fastest way to screen bacterial colonies. Our PCR machine takes 24 tubes so I routinely screen 22 colonies + 1 negative + 1 positive control. ### Choosing the primers Ideally you want a primer pair that can only work if the correct construct is present eg. a vector flanking primer and a gene specific primer. However, this may not allow you a positive control (essential) so you might have to use both vector flanking primers instead. If y...

  11. PCR in forensic genetics

    DEFF Research Database (Denmark)

    Morling, Niels

    2009-01-01

    Since the introduction in the mid-1980s of analyses of minisatellites for DNA analyses, a revolution has taken place in forensic genetics. The subsequent invention of the PCR made it possible to develop forensic genetics tools that allow both very informative routine investigations and still more...... and more advanced, special investigations in cases concerning crime, paternity, relationship, disaster victim identification etc. The present review gives an update on the use of DNA investigations in forensic genetics....

  12. Nonconscious and conscious color priming in schizophrenia.

    Science.gov (United States)

    Jahshan, Carol; Wynn, Jonathan K; Breitmeyer, Bruno G; Green, Michael F

    2012-10-01

    Deficits in visual processing are well established in schizophrenia. However, there is conflicting evidence about whether these deficits start before the formation of percepts because visual processing studies in schizophrenia have typically examined the processing of consciously registered stimuli. In this study, we used nonconscious color priming to evaluate the very early visual processing stages in schizophrenia. Nonconscious and conscious color priming was assessed in 148 schizophrenia patients and 54 healthy control subjects. In both conditions, subjects identified the color of a ring preceded by a disk (prime) in the same color (congruent) or a different color (incongruent). The ring rendered the disk invisible in the nonconscious condition (SOA of 62.5 ms) or did not mask the disk (SOA of 200 ms) in the conscious condition. Schizophrenia patients exhibited a color priming effect (longer reaction times in the incongruent vs. congruent trials) that was similar to healthy controls in both the nonconscious and conscious priming conditions. Healthy controls had a significantly larger priming effect in the nonconscious vs. conscious condition, but patients did not show a significant difference in priming effects between the two conditions. Our results indicate that schizophrenia patients do not have deficits at the nonconscious, pre-perceptual stages of visual processing, suggesting that the feed forward sweep of information processing (from retina to V1) might be intact in schizophrenia. These results imply that the well-documented visual processing deficits in this illness likely occur at later, percept-dependent stages of processing. PMID:22785333

  13. The PRISM/PRIME Project

    International Nuclear Information System (INIS)

    Lepton Flavour violation is predicted by many theories beyond the standard model. In the muon sector such a violation entails not only direct μ→eγ decay but also the conversion process μ→e. To measure this to high precision requires a large number of muons of very similar energy, and this is difficult to achieve from a muon target with conventional beam optics. PRISM is an FFAG system designed to accept large numbers of muons (1012/sec) with a wide range of energies, and render them monochromatic by accelerating the less energetic muons and decelerating the more energetic ones. To preserve Liouville's theorem, this is accompanied by a broadening in the timing of the muons, hence the name 'Phase Rotated Intense Slow Muon source.' The principles of this device have been demonstrated and components prototyped. PRIME is a detector (PRISM Muon Electron Conversion) which has been designed to stop 20 MeV bunches of muons in a thin foil, giving a very clean signal and reaching a background sensitivity of 10-18, four orders of magnitude better than today's limits and probing the interesting region for BSM theories.

  14. An introduction to E-Prime

    Directory of Open Access Journals (Sweden)

    Dominic Charbonneau

    2009-09-01

    Full Text Available When running an experiment, precision is essential to ensure results are as exact as possible. Thus, computers, which offer endless accuracy, have become an inevitable tool to design experiments. To avoid programming from scratch for each new situation, a program, E-Prime, has been created to ease the conception of experiments. E-Prime, developed by PSTNet, offers a user-friendly interface that makes typical experiments easy to create. This paper shows how to effortlessly create an experiment with E-Prime, followed by a simple example.

  15. Affective priming with associatively acquired valence

    OpenAIRE

    Cristina Saugar; Luis Aguado; Manuel Pierna

    2005-01-01

    Priming afectivo con estímulos de valencia adquirida asociativamente. Se estudió en tres experimentos el efecto que sobre la evaluación de "targets" con valencia positiva o negativa tenía la presentación de "primes" congruentes o incongruentes afectivamente (el llamado efecto de "priming afectivo"). En el Experimento 1 se replicó el efecto básico empleando como estímulos nombres del idioma español: el tiempo de reacción de las respuestas evaluativas (agradable/de...

  16. 模糊Prime元%Fuzzy Prime Elements

    Institute of Scientific and Technical Information of China (English)

    饶三平

    2012-01-01

    基于完备剩余格,本文在模糊完备格中,引入模糊Prime元概念.给出了模糊Prime元的等价刻画,证明了所有的模糊Prime元构成的模糊集是模糊完全分配格.%Based on complete residuated lattices, the concept of fuzzy Prime elements in fuzzy complete lattices is given, then the equivalent characterization of fuzzy Prime elements is obtained. We also prove that the fuzzy subsets of fuzzy Prime elements is a fuzzy completely distributice lattice.

  17. ARITHMETIC PROGRESSIONS FOR COUNTING PRIME NUMBERS

    Directory of Open Access Journals (Sweden)

    V.J.DEVASIA

    2014-11-01

    Full Text Available In this paper two arithmetic progressions are proposed for listing and counting the prime numbers less than or equal to a given integer. From these progressions, how one can filter out prime numbers is the topic of discussion in this paper. An easy to implement formula is presented to compute the number of primes by eliminating the number of composite numbers in an iterative and recursive manner. Numerical examples are presented to demonstrate how the procedure works in an efficient and simple way.

  18. Universal conventional and real-time PCR diagnosis tools for Sarcoptes scabiei

    OpenAIRE

    Alasaad, Samer; Molinar Min, AnnaRita; Pasquetti, Mario; Alagaili, Abdulaziz N.; D'Amelio, Stefano; Berilli, Federica; Obanda, Vincent; Gebely, Mohamed A.; Soriguer, Ramón C; Rossi, Luca

    2015-01-01

    Background: The mite Sarcoptes scabiei has a known host-range of over 100 mammal species including humans. One of the prime objectives of the Sarcoptes-World Molecular Network (WMN) is to design and develop universal Sarcoptes PCR-based diagnosis methods. Methods: We describe here for the first time two universal mitochondrial-based diagnosis methods: (i) conventional end-point PCR and (ii) TaqMan real-time PCR. The design of both of these universal diagnosis methods was based ...

  19. Evaluation of PCR and multiplex PCR in relation to nested PCR for diagnosing Theileria equi

    OpenAIRE

    Danielle C. Leal; Cláudio R. Madruga; Paulo F. de Matos; Bárbara M. P. da S. Souza; Carlos R. Franke

    2011-01-01

    Conventional PCR (PCRTeq) for diagnosing Theileria equi and multiplex PCR (M/PCRTeq-Bc) for diagnosing T. equi and Babesia caballi were comparatively evaluated with nested PCR (N/PCR-Teq) for diagnosing equine piroplasmosis. In DNA sensitivity determinations, in multiple dilutions of equine blood that had tested positive for T. equi, PCR-Teq and N/PCR-Teq detected hemoparasite DNA in the larger dilutions (1:128), but did not differ significantly from the M/PCRTeq-Bc (1:64). In analyses on equ...

  20. MPprimer: a program for reliable multiplex PCR primer design

    Directory of Open Access Journals (Sweden)

    Wang Xiaolei

    2010-03-01

    Full Text Available Abstract Background Multiplex PCR, defined as the simultaneous amplification of multiple regions of a DNA template or multiple DNA templates using more than one primer set (comprising a forward primer and a reverse primer in one tube, has been widely used in diagnostic applications of clinical and environmental microbiology studies. However, primer design for multiplex PCR is still a challenging problem and several factors need to be considered. These problems include mis-priming due to nonspecific binding to non-target DNA templates, primer dimerization, and the inability to separate and purify DNA amplicons with similar electrophoretic mobility. Results A program named MPprimer was developed to help users for reliable multiplex PCR primer design. It employs the widely used primer design program Primer3 and the primer specificity evaluation program MFEprimer to design and evaluate the candidate primers based on genomic or transcript DNA database, followed by careful examination to avoid primer dimerization. The graph-expanding algorithm derived from the greedy algorithm was used to determine the optimal primer set combinations (PSCs for multiplex PCR assay. In addition, MPprimer provides a virtual electrophotogram to help users choose the best PSC. The experimental validation from 2× to 5× plex PCR demonstrates the reliability of MPprimer. As another example, MPprimer is able to design the multiplex PCR primers for DMD (dystrophin gene which caused Duchenne Muscular Dystrophy, which has 79 exons, for 20×, 20×, 20×, 14×, and 5× plex PCR reactions in five tubes to detect underlying exon deletions. Conclusions MPprimer is a valuable tool for designing specific, non-dimerizing primer set combinations with constrained amplicons size for multiplex PCR assays.

  1. Polimeraz Zincir Reaksiyonu (PCR) Optimizasyonu

    OpenAIRE

    KAHYA, Serpil; BUYUKCANGAZ, Esra; Carli, K. Tayfun

    2013-01-01

    Polymerase chain reaction (PCR), a deoxyribonucleic acid (DNA) that lies between two known chain enzymatically amplify a specific DNA region as an in vitro technique becoming common everyday. PCR method, used for many purposes such as diagnosis, epidemiology and studies to determine the amount of DNA, are still under development. Microbiology is taking a significant proportion in PCR usage, like innovations of application in other fields. Furthermore, PCR is the fundamental molecular method t...

  2. Pakistan prime minister pledges science boost

    CERN Multimedia

    1999-01-01

    Pakistan's prime minister announced plans for a 1 billion rupee (23 million US dollars) investment in science and technology. About half is expected to be spent on research and infrasture, the rest on science education (6 paragraphs).

  3. SATDA teams up with American Prime Group

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    <正>With over 37 years of experience in the real estate industry, American Prime, a family owned and operated company, headquartered in Miami, Florida, is an industry leader in the developing, marketing, selling, and financing of real

  4. Bounded Gaps between Products of Special Primes

    Directory of Open Access Journals (Sweden)

    Ping Ngai Chung

    2014-03-01

    Full Text Available In their breakthrough paper in 2006, Goldston, Graham, Pintz and Yıldırım proved several results about bounded gaps between products of two distinct primes. Frank Thorne expanded on this result, proving bounded gaps in the set of square-free numbers with r prime factors for any r ≥ 2, all of which are in a given set of primes. His results yield applications to the divisibility of class numbers and the triviality of ranks of elliptic curves. In this paper, we relax the condition on the number of prime factors and prove an analogous result using a modified approach. We then revisit Thorne’s applications and give a better bound in each case.

  5. Cannabis use, schizotypy, and negative priming.

    Science.gov (United States)

    Albertella, Lucy; Le Pelley, Mike E; Copeland, Jan

    2015-08-30

    The present study examined the effects of frequency of cannabis use, schizotypy, and age on cognitive control, as measured using a location-based negative priming task in a sample of 124 Australians aged 15-24 who had ever used cannabis. This study found that the schizotypy dimension of Impulsive Nonconformity had a significant effect on negative priming such that participants with higher scores on this dimension showed reduced negative priming. Also, higher levels of psychological distress were associated with greater negative priming. Finally, there was a significant age by cannabis use interaction indicating that younger, frequent users of cannabis may be more susceptible to its effects on cognitive control and perhaps at greater risk of developing a disorder on the psychosis dimension. PMID:26154815

  6. Active coated nano-particle excited by an arbitrarily located electric Hertzian dipole — resonance and transparency effects

    DEFF Research Database (Denmark)

    Arslanagic, Samel; Ziolkowski, Richard W.

    2010-01-01

    The present work investigates the optical properties of active coated spherical nano-particles excited by an arbitrarily located electric Hertzian dipole. The nano-particles are made of specific dielectric and plasmonic materials. The spatial near-field distribution as well as the normalized radi......-radiating/transparent states of the active coated nano-particle are identified. Implications of both the resonant and non-radiating states on the previously proposed localized sensors based on the active coated nano-particle will also be considered here....

  7. Finite-volume scheme for transonic potential flow about airfoils and bodies in an arbitrarily shaped channel

    Science.gov (United States)

    South, Jerry C., Jr.; Doria, Michael L.; Green, Lawrence L.

    1986-01-01

    A conservative finite-volume difference scheme is developed for the potential equation to solve transonic flow about airfoils and bodies in an arbitrarily shaped channel. The scheme employs a mesh which is a nearly conformal O mesh about the airfoil and nearly orthogonal at the channel walls. The mesh extends to infinity upstream and downstream, where the mapping is singular. Special procedures are required to treat the singularities at infinity, including computation of the metrics near those points. Channels with exit areas different from inlet areas are solved; a body with a sting mount is an example of such a case.

  8. Musical priming effects on food preference

    OpenAIRE

    Francesco Petrucci

    2013-01-01

    How music can influence our pleasure for food? When we listen to the music, informations that arrives to the brain to be interpreted may recall, or prime, certain thoughts and feelings that have implications for our attitudes and behaviors. Could the thoughts primed by music influence what people actually perceive via another of the senses, in this case taste? Results of present experiment suggest that hearing a certain background music while eating some foodstuffs can increase arousing and p...

  9. An introduction to E-Prime

    OpenAIRE

    Dominic Charbonneau; Laurence Richard

    2009-01-01

    When running an experiment, precision is essential to ensure results are as exact as possible. Thus, computers, which offer endless accuracy, have become an inevitable tool to design experiments. To avoid programming from scratch for each new situation, a program, E-Prime, has been created to ease the conception of experiments. E-Prime, developed by PSTNet, offers a user-friendly interface that makes typical experiments easy to create. This paper shows how to effortlessly create an experiment...

  10. Prime Factorization Using Magnonic Holographic Device

    OpenAIRE

    Khivintsev, Y.; Ranjbar, M.; Gutierrez, D.; Chiang, H; Kozhevnikov, A.; Filimonov, Y.; Khitun, A.

    2016-01-01

    Determining the prime factors of a given number N is a problem, which requires super-polynomial time for conventional digital computers. A polynomial-time algorithm was invented by P. Shor for quantum computers. However, the realization of quantum computers is associated with significant technological challenges in achieving and preserving quantum entanglement. Prime factorization can be also solved by using classical wave interference without quantum entanglement. In this work, we present ex...

  11. Nonconscious and Conscious Color Priming in Schizophrenia

    OpenAIRE

    Jahshan, Carol; Wynn, Jonathan K.; Breitmeyer, Bruno G.; Green, Michael F

    2012-01-01

    Deficits in visual processing are well established in schizophrenia. However, there is conflicting evidence about whether these deficits start before the formation of percepts because visual processing studies in schizophrenia have typically examined the processing of consciously registered stimuli. In this study, we used nonconscious color priming to evaluate the very early visual processing stages in schizophrenia. Nonconscious and conscious color priming was assessed in 148 schizophrenia p...

  12. Chebyshev's bias for products of two primes

    CERN Document Server

    Ford, Kevin

    2009-01-01

    Under two assumptions, we determine the distribution of the difference between two functions each counting the numbers < x that are in a given arithmetic progression modulo q and the product of two primes. The two assumptions are (i) the Extended Riemann Hypothesis for Dirichlet L-functions modulo q, and (ii) that the imaginary parts of the nontrivial zeros of these L-functions are linearly independent over the rationals. Our results are analogs of similar results proved for primes in arithmetic progressions by Rubinstein and Sarnak. In particular, we show that the bias for products of two primes is always reversed from the bias for primes. For example, while Rubinstein and Sarnak showed, under (i) and (ii), that 99.6% of the time there are more primes up to x which are 3 mod 4 than those which are 1 mod 4, we show that 89.4% of the time, there are more products of two primes which are 1 mod 4 than 3 mod 4.

  13. The set of primes: Towards an optimized algorithm, prime generation and validation, and asymptotic consequences

    International Nuclear Information System (INIS)

    Starting from the result that the prime distribution is deterministic, we show in its maximal reduced form, the set of prime numbers P. This set can be expressed in terms of two subsets of N using three specific selection rules, acting on two sets of prime candidates. The asymptotic behaviour is considered too. We go head towards an optimized algorithm to generate primes, whose computational complexity is C(n) element of O(n). In addition a pre-computed algorithm is also considered and its computational complexity C(n) element of O(1).

  14. PCR, exit stage left ...

    CERN Multimedia

    2004-01-01

    The Prevessin Control Room during LEP's start up in 1989. The Prévessin Control Room (PCR) was recently engulfed in a wave of nostalgia. The PCR, scene of some of the greatest moments in CERN's history, is being dismantled to prepare for a complete overhaul. In February 2006, a new combined control centre for all the accelerators will open its doors on the same site, together with a new building currently under construction (see Bulletin issue 27/2004 of 28 June 2004). This marks the end of an important chapter in CERN's history. The Prévessin Control Room saw its first momentous event 28 years ago when the 400 GeV beam for the SPS was commissioned in the presence of Project Leader John Adams. It was also here that the first proton-antiproton collisions were observed, in 1981. Eight years later, in 1989, operators and directors alike jumped for joy at the announcement of the first electron-positron collisions at the start up of LEP, the biggest accelerator in the world. Today the 80 terminals and PCs have b...

  15. Semantic Priming for Coordinate Distant Concepts in Alzheimer's Disease Patients

    Science.gov (United States)

    Perri, R.; Zannino, G. D.; Caltagirone, C.; Carlesimo, G. A.

    2011-01-01

    Semantic priming paradigms have been used to investigate semantic knowledge in patients with Alzheimer's disease (AD). While priming effects produced by prime-target pairs with associative relatedness reflect processes at both lexical and semantic levels, priming effects produced by words that are semantically related but not associated should…

  16. Resource cost results for one-way entanglement distillation and state merging of compound and arbitrarily varying quantum sources

    International Nuclear Information System (INIS)

    We consider one-way quantum state merging and entanglement distillation under compound and arbitrarily varying source models. Regarding quantum compound sources, where the source is memoryless, but the source state an unknown member of a certain set of density matrices, we continue investigations begun in the work of Bjelaković et al. [“Universal quantum state merging,” J. Math. Phys. 54, 032204 (2013)] and determine the classical as well as entanglement cost of state merging. We further investigate quantum state merging and entanglement distillation protocols for arbitrarily varying quantum sources (AVQS). In the AVQS model, the source state is assumed to vary in an arbitrary manner for each source output due to environmental fluctuations or adversarial manipulation. We determine the one-way entanglement distillation capacity for AVQS, where we invoke the famous robustification and elimination techniques introduced by Ahlswede. Regarding quantum state merging for AVQS we show by example that the robustification and elimination based approach generally leads to suboptimal entanglement as well as classical communication rates

  17. THE THEOREMS OF CHEBYSHEV ABOUT THE DISTRIBUTION OF PRIME NUMBERS AND SOME PROBLEMS, CONNECTED WITH PRIME NUMBERS

    OpenAIRE

    Laptev V. N.; Sergeev A. E.; Sergeev E. A.

    2015-01-01

    The article presents the theorem of Chebyshev on the distribution of primes, considering functions that approximated prime numbers. We have also considered a new function, which is quite good for approximation of prime numbers. A review of the known results on distribution of prime numbers is given as well

  18. Long-term effects of subliminal priming on academic performance

    OpenAIRE

    Lowery, BS; Eisenberger, NI; Hardin, CD; Sinclair, S.

    2006-01-01

    This research examines the temporal range of subliminal priming effects on complex behavior. In Experiments 1 and 2, participants were subliminally primed with words either related or unrelated to intelligence before completing a practice exam, administered 1 to 4 days before an actual course midterm. Results revealed that the intelligence primes increased performance on the midterm compared to neutral primes. Experiment 1 demonstrated that being told that the priming task was designed to hel...

  19. A one-sided Prime Ideal Principle for noncommutative rings

    OpenAIRE

    Reyes, Manuel L.

    2009-01-01

    Completely prime right ideals are introduced as a one-sided generalization of the concept of a prime ideal in a commutative ring. Some of their basic properties are investigated, pointing out both similarities and differences between these right ideals and their commutative counterparts. We prove the Completely Prime Ideal Principle, a theorem stating that right ideals that are maximal in a specific sense must be completely prime. We offer a number of applications of the Completely Prime Idea...

  20. False memories and lexical decision: even twelve primes do not cause long-term semantic priming

    NARCIS (Netherlands)

    R. Zeelenberg (René); D. Pecher (Diane)

    2002-01-01

    textabstractSemantic priming effects are usually obtained only if the prime is presented shortly before the target stimulus. Recent evidence obtained with the so-called false memory paradigm suggests, however, that in both explicit and implicit memory tasks semantic relations between words can resul

  1. Prime and prejudice: co-occurrence in the culture as a source of automatic stereotype priming.

    Science.gov (United States)

    Verhaeghen, Paul; Aikman, Shelley N; Van Gulick, Ana E

    2011-09-01

    It has been argued that stereotype priming (response times are faster for stereotypical word pairs, such as black-poor, than for non-stereotypical word pairs, such as black-balmy) is partially a function of biases in the belief system inherent in the culture. In three priming experiments, we provide direct evidence for this position, showing that stereotype priming effects associated with race, gender, and age can be very well explained through objectively measured associative co-occurrence of prime and target in the culture: (a) once objective associative strength between word pairs is taken into account, stereotype priming effects disappear; (b) the relationship between response time and associative strength is identical for social primes and non-social primes. The correlation between associative-value-controlled stereotype priming and self-report measures of racism, sexism, and ageism is near zero. The racist/sexist/ageist in all of us appears to be (at least partially) a reflection of the surrounding culture. PMID:21884547

  2. TmPrime: fast, flexible oligonucleotide design software for gene synthesis

    Science.gov (United States)

    Bode, Marcus; Khor, Samuel; Ye, Hongye; Li, Mo-Huang; Ying, Jackie Y.

    2009-01-01

    Herein we present TmPrime, a computer program to design oligonucleotide sets for gene assembly by both ligase chain reaction (LCR) and polymerase chain reaction (PCR). TmPrime offers much flexibility with no constraints on the gene and oligonucleotide lengths. The program divides the long input DNA sequence based on the input desired melting temperature, and dynamically optimizes the length of oligonucleotides to achieve homologous melting temperatures. The output reports the melting temperatures, oligonucleotide sequences and potential formation of secondary structures. Our program also provides functions on sequence pooling to separate long genes into smaller pieces for multi-pool assembly and codon optimization for expression. The software has been successfully used in the design and synthesis of green fluorescent protein fragment (GFPuv) (760 bp), human protein kinase B-2 (PKB2) (1446 bp) and the promoter of human calcium-binding protein A4 (S100A4) (752 bp) using real-time PCR assembly with LCGreen I, which offers a novel approach to compare the efficiency of gene synthesis. The purity of assembled products is successfully estimated with the use of melting curve analysis, which would potentially eliminate the necessity for agarose gel electrophoresis. This program is freely available at http://prime.ibn.a-star.edu.sg. PMID:19515937

  3. A computational approach to negative priming

    Science.gov (United States)

    Schrobsdorff, H.; Ihrke, M.; Kabisch, B.; Behrendt, J.; Hasselhorn, M.; Herrmann, J. Michael

    2007-09-01

    Priming is characterized by a sensitivity of reaction times to the sequence of stimuli in psychophysical experiments. The reduction of the reaction time observed in positive priming is well-known and experimentally understood (Scarborough et al., J. Exp. Psycholol: Hum. Percept. Perform., 3, pp. 1-17, 1977). Negative priming—the opposite effect—is experimentally less tangible (Fox, Psychonom. Bull. Rev., 2, pp. 145-173, 1995). The dependence on subtle parameter changes (such as response-stimulus interval) usually varies. The sensitivity of the negative priming effect bears great potential for applications in research in fields such as memory, selective attention, and ageing effects. We develop and analyse a computational realization, CISAM, of a recent psychological model for action decision making, the ISAM (Kabisch, PhD thesis, Friedrich-Schiller-Universitat, 2003), which is sensitive to priming conditions. With the dynamical systems approach of the CISAM, we show that a single adaptive threshold mechanism is sufficient to explain both positive and negative priming effects. This is achieved by comparing results obtained by the computational modelling with experimental data from our laboratory. The implementation provides a rich base from which testable predictions can be derived, e.g. with respect to hitherto untested stimulus combinations (e.g. single-object trials).

  4. Priming intelligent behavior: an elusive phenomenon.

    Directory of Open Access Journals (Sweden)

    David R Shanks

    Full Text Available Can behavior be unconsciously primed via the activation of attitudes, stereotypes, or other concepts? A number of studies have suggested that such priming effects can occur, and a prominent illustration is the claim that individuals' accuracy in answering general knowledge questions can be influenced by activating intelligence-related concepts such as professor or soccer hooligan. In 9 experiments with 475 participants we employed the procedures used in these studies, as well as a number of variants of those procedures, in an attempt to obtain this intelligence priming effect. None of the experiments obtained the effect, although financial incentives did boost performance. A Bayesian analysis reveals considerable evidential support for the null hypothesis. The results conform to the pattern typically obtained in word priming experiments in which priming is very narrow in its generalization and unconscious (subliminal influences, if they occur at all, are extremely short-lived. We encourage others to explore the circumstances in which this phenomenon might be obtained.

  5. Modal Analysis Using Co-Prime Arrays

    Science.gov (United States)

    Pakrooh, Pooria; Scharf, Louis L.; Pezeshki, Ali

    2016-05-01

    Let a measurement consist of a linear combination of damped complex exponential modes, plus noise. The problem is to estimate the parameters of these modes, as in line spectrum estimation, vibration analysis, speech processing, system identification, and direction of arrival estimation. Our results differ from standard results of modal analysis to the extent that we consider sparse and co-prime samplings in space, or equivalently sparse and co-prime samplings in time. Our main result is a characterization of the orthogonal subspace. This is the subspace that is orthogonal to the signal subspace spanned by the columns of the generalized Vandermonde matrix of modes in sparse or co-prime arrays. This characterization is derived in a form that allows us to adapt modern methods of linear prediction and approximate least squares, such as iterative quadratic maximum likelihood (IQML), for estimating mode parameters. Several numerical examples are presented to demonstrate the validity of the proposed modal estimation methods, and to compare the fidelity of modal estimation with sparse and co-prime arrays, versus SNR. Our calculations of Cram\\'{e}r-Rao bounds allow us to analyze the loss in performance sustained by sparse and co-prime arrays that are compressions of uniform linear arrays.

  6. Affective Priming in Major Depressive Disorder

    Directory of Open Access Journals (Sweden)

    Joelle eLeMoult

    2012-10-01

    Full Text Available Research on cognitive biases in depression has provided considerable evidence for the impact of emotion on cognition. Individuals with depression tend to preferentially process mood-congruent material and to show deficits in the processing of positive material leading to biases in attention, memory, and judgments. More research is needed, however, to fully understand which cognitive processes are affected. The current study further examines the impact of emotion on cognition using a priming design with facial expressions of emotion. Specifically, this study tested whether the presentation of facial expressions of emotion affects subsequent processing of affective material in participants with major depressive disorder (MDD and healthy controls (CTL. Facial expressions displaying happy, sad, angry, disgusted, or neutral expressions were presented as primes for 500ms, and participants’ speed to identify a subsequent target’s emotional expression was assessed. All participants displayed greater interference from emotional versus neutral primes, marked by slower response times to judge the emotion of the target face when it was preceded by an emotional prime. Importantly, the CTL group showed the strongest interference when happy emotional expressions served as primes whereas the MDD group failed to show this bias. These results add to a growing literature that shows that depression is associated with difficulties in the processing of positive material.

  7. Advances in simulation of PCR

    International Nuclear Information System (INIS)

    Polymerase chain reaction (PCR) is an important diagnosis tool in molecular biology, which have been greatly improved by PCR. However, optimizing the experimental conditions is still a problem for PRC. Computer biology can be a solution to this problem. In this paper, developments of the mathematical models for PCA are reviewed. It is believed that this kind of research efforts shall be helpful for optimizing the experimental conditions and providing guidance for the biologists and understanding the mechanism of PCR. (authors)

  8. Digital droplet PCR on disk.

    Science.gov (United States)

    Schuler, Friedrich; Trotter, Martin; Geltman, Marcel; Schwemmer, Frank; Wadle, Simon; Domínguez-Garrido, Elena; López, María; Cervera-Acedo, Cristina; Santibáñez, Paula; von Stetten, Felix; Zengerle, Roland; Paust, Nils

    2016-01-01

    Existing systems for digital droplet PCR (ddPCR) either suffer from low integration or are difficult to introduce to mass fabrication. Here we present an integrated system that is compatible to mass fabrication and combines emulsification, PCR, and fluorescence readout in a single chamber within a disposable cartridge (disk). Droplets are generated by injecting the sample into fluorinated oil via centrifugal step emulsification. The resulting emulsion is aligned in the PCR and readout zone by capillary action. During thermocycling, gas bubbles generated by degassing are removed by capillary driven transport through tapered regions in the PCR chamber. Thereby, the positioning of the emulsion within the readout zone of the PCR chamber is ensured at any time and no bubbles are present during readout. Manual handling of the disk solely requires pipetting of oil and PCR mix into the inlet structures, placing the disk into the thermocycler and subsequently into a microarray scanner. The functionality of the ddPCR process chain is demonstrated by quantitative detection of the cystic fibrosis causing mutation p.Phe508del, which is of interest for non-invasive prenatal testing (NIPT). The mutation was detected in a concentration range spanning four orders of magnitude. We envision that this work will lay the base for the development of highly integrated sample-to-digital-answer PCR systems that can be employed in routine clinical diagnosis. PMID:26610263

  9. Random reward priming is task-contingent

    DEFF Research Database (Denmark)

    Ásgeirsson, Árni Gunnar; Kristjánsson, Árni

    2014-01-01

    Consistent financial reward of particular features influences the allocation of visual attention in many ways. More surprising are 1-trial reward priming effects on attention where reward schedules are random and reward on one trial influences attentional allocation on the next. Those findings are......, and highlight the need for a more nuanced account. In many other paradigms reward effects have been found to progress gradually, becoming stronger as they build up, and we argue that for robust reward priming, reward schedules need to be more consistent than in the original 1-trial reward priming...... thought to reflect that rewarded features become more salient than unrewarded ones on the subsequent trial. Here we attempt to conceptually replicate this effect, testing its generalizability. In three versions of an analogous paradigm to the additional singleton paradigm involving singleton search for a...

  10. A small world network of prime numbers

    Science.gov (United States)

    Chandra, Anjan Kumar; Dasgupta, Subinay

    2005-11-01

    According to Goldbach conjecture, any even number can be broken up as the sum of two prime numbers: n=p+q. We construct a network where each node is a prime number and corresponding to every even number n, we put a link between the component primes p and q. In most cases, an even number can be broken up in many ways, and then we chose one decomposition with a probability |p-q|α. Through computation of average shortest distance and clustering coefficient, we conclude that for α>-1.8 the network is of small world type and for α<-1.8 it is of regular type. We also present a theoretical justification for such behaviour.

  11. Prime Minister of Pakistan visits CERN

    CERN Multimedia

    Anaïs Schaeffer

    2016-01-01

    On Saturday, 23 January 2016, CERN welcomed Mr Muhammad Nawaz Sharif, Prime Minister of Pakistan.   From left to right: Minister of Finance Mr Mohammad Ishaq Dar, Prime Minister of the Islamic Republic of Pakistan, Muhammad Nawaz Sharif, CERN Director-General Fabiola Gianotti and CMS national contact physicist Hafeez Hoorani. Mr Muhammad Nawaz Sharif arrived at Point 5 in Cessy, where he was welcomed onto French soil by the sous-préfet of Cessy, Stéphane Donnot, and, representing CERN, Director-General Fabiola Gianotti, Directors Eckhard Elsen and Charlotte Warakaulle, and Rüdiger Voss, the adviser for relations with Pakistan. It was the first visit by a head of government of Pakistan since the country became CERN's latest Associate Member State in July 2015. The Prime Minister then had the opportunity to visit the CMS underground experimental area accompanied by the CMS Spokesperson, Tiziano Camporesi, and the CMS collaboration’...

  12. The Importance of Numbers and the Need to Study Primes: The Prime Questions

    Directory of Open Access Journals (Sweden)

    Matthew Curtis

    2011-01-01

    Full Text Available Problem statement: The study of prime numbers is important today as it was in ancient times. The level of interest in any form of mathematics of students in Australian high schools is decreasing and furthermore the level of interest in number theory is also less that it was before; prime numbers is not being considered as an area of interest by our younger stars. This paper explores prime numbers and attempts to show some interesting aspects in the study of primes that highlight why number theory studies can be considered important for today’s up and coming mathematicians. Approach: The historical review of mathematics and analysis of simpler but accessible proofs can help show clearly the motivations behind the mathematicians work. In depth analysis work may be used to reveal parts passion, politics and dedication played in the study of numbers and construction of equations. The analysis of proofs is also used to provide a further background of prime numbers and why the pursuit of primes. Results: The analysis shows there are a number of motivating factors that may promote real interest in number theory; such as human dramas behind the “prime” mathematics. The paper shows politics and passion also exist behind numbers. If explicated well, this may help drive more interest in research by younger mathematicians by making mathematics human activity. In number theory there are a number of unanswered questions that often attract large sums of money. There are a number of proofs in primes and these are made accessible to the younger researchers so that they appreciate the nature of the problems faced by the history’s intellectual minds in their efforts to solve some of the unanswered questions; and those they began to solve. The analysis based on historical works of mathematicians as well as the modern studies reveal surprising "real life" applications for prime number theory. Conclusion: Mathematics can often be thought as only for the enjoyment

  13. Affective priming using facial expressions modulates liking for abstract art.

    Directory of Open Access Journals (Sweden)

    Albert Flexas

    Full Text Available We examined the influence of affective priming on the appreciation of abstract artworks using an evaluative priming task. Facial primes (showing happiness, disgust or no emotion were presented under brief (Stimulus Onset Asynchrony, SOA = 20 ms and extended (SOA = 300 ms conditions. Differences in aesthetic liking for abstract paintings depending on the emotion expressed in the preceding primes provided a measure of the priming effect. The results showed that, for the extended SOA, artworks were liked more when preceded by happiness primes and less when preceded by disgust primes. Facial expressions of happiness, though not of disgust, exerted similar effects in the brief SOA condition. Subjective measures and a forced-choice task revealed no evidence of prime awareness in the suboptimal condition. Our results are congruent with findings showing that the affective transfer elicited by priming biases evaluative judgments, extending previous research to the domain of aesthetic appreciation.

  14. Prime time versus nonprime time on MEDLINE.

    OpenAIRE

    Burdick, A J

    1985-01-01

    The number of users on the MEDLARS system varied more during nonprime time than on prime time; there were times of higher than average use and times of much lower use. This variation in the number of users influenced search time. The study found a variation of as much as 19% from the mean search time for times of high use versus times of low use. Added-time formulas showed the additional time allowed for a search on nonprime time before costs would equal those for the same search on prime tim...

  15. Exponential sums over primes in short intervals

    Institute of Scientific and Technical Information of China (English)

    LIU Jianya; L(U) Guangshi; ZHAN Tao

    2006-01-01

    In this paper we establish one new estimate on exponential sums over primes in short intervals. As an application of this result, we sharpen Hua's result by proving that each sufficiently large integer N congruent to 5 modulo 24 can be written as N = p21 +p22 +p23 +p24 +p25, with |pj - √N/5| ≤ U = N1/2-1/20+ε,where pj are primes. This result is as good as what one can obtain from the generalized Riemann hypothesis.

  16. Positions priming in briefly presented search arrays

    DEFF Research Database (Denmark)

    Asgeirsson, Arni Gunnar; Kristjánsson, Árni; Kyllingsbæk, Søren;

    2011-01-01

    Repetition priming in visual search has been a topic of extensive research since Maljkovic & Nakayama [1994, Memory & Cognition, 22, 657-672] presented the first detailed studies of such effects. Their results showed large reductions in reaction times when target color was repeated on consecutive...... the targets are oddly colored alphanumeric characters. The effects arise at very low exposure durations and benefit accuracy at all exposure durations towards the subjects’ ceiling. We conclude that temporally constricted experimental conditions can add to our understanding priming in visual search...

  17. Acceleration Detection of Large (Probably Prime Numbers

    Directory of Open Access Journals (Sweden)

    Dragan Vidakovic

    2013-02-01

    Full Text Available In order to avoid unnecessary applications of Miller-Rabin algorithm to the number in question, we resortto trial division by a few initial prime numbers, since such a division take less time. How far we should gowith such a division is the that we are trying to answer in this paper?For the theory of the matter is fullyresolved. However, that in practice we do not have much use.Therefore, we present a solution that isprobably irrelevant to theorists, but it is very useful to people who have spent many nights to producelarge (probably prime numbers using its own software.

  18. Nonlinear propagation of dust-acoustic solitary waves in a dusty plasma with arbitrarily charged dust and trapped electrons

    Indian Academy of Sciences (India)

    O Rahman; A A Mamun

    2013-06-01

    A theoretical investigation of dust-acoustic solitary waves in three-component unmagnetized dusty plasma consisting of trapped electrons, Maxwellian ions, and arbitrarily charged cold mobile dust was done. It has been found that, owing to the departure from the Maxwellian electron distribution to a vortex-like one, the dynamics of small but finite amplitude dust-acoustic (DA) waves is governed by a nonlinear equation of modified Korteweg–de Vries (mKdV) type (instead of KdV). The reductive perturbation method was employed to study the basic features (amplitude, width, speed, etc.) of DA solitary waves which are significantly modified by the presence of trapped electrons. The implications of our results in space and laboratory plasmas are briefly discussed.

  19. Hawking effect and quantum nonthermal radiation of an arbitrarily accelerating charged black hole using a new tortoise coordinate transformation

    Science.gov (United States)

    Pan, Wei-Zhen; Yang, Xue-Jun; Xie, Zhi-Kun

    2011-04-01

    Using a new tortoise coordinate transformation, this paper investigates the Hawking effect from an arbitrarily accelerating charged black hole by the improved Damour—Ruffini method. After the tortoise coordinate transformation, the Klein—Gordon equation can be written as the standard form at the event horizon. Then extending the outgoing wave from outside to inside of the horizon analytically, the surface gravity and Hawking temperature can be obtained automatically. It is found that the Hawking temperatures of different points on the surface are different. The quantum nonthermal radiation characteristics of a black hole near the event horizon is also discussed by studying the Hamilton—Jacobi equation in curved spacetime and the maximum overlap of the positive and negative energy levels near the event horizon is given. There is a dimensional problem in the standard tortoise coordinate and the present results may be more reasonable.

  20. Hawking effect and quantum nonthermal radiation of an arbitrarily accelerating charged black hole using a new tortoise coordinate transformation

    Institute of Scientific and Technical Information of China (English)

    Pan Wei-Zhen; Yang Xue-Jun; Xie Zhi-Kun

    2011-01-01

    Using a new tortoise coordinate transformation, this paper investigates the Hawking effect from an arbitrarily accelerating charged black hole by the improved Damour-Ruffini method. After the tortoise coordinate transformation,the Klein-Gordon equation can be written as the standard form at the event horizon. Then extending the outgoing wave from outside to inside of the horizon analytically, the surface gravity and Hawking temperature can be obtained automatically. It is found that the Hawking temperatures of different points on the surface are different. The quantum nonthermal radiation characteristics of a black hole near the event horizon is also discussed by studying the Hamilton Jacobi equation in curved spacetime and the maximum overlap of the positive and negative energy levels near the event horizon is given. There is a dimensional problem in the standard tortoise coordinate and the present results may be more reasonable.

  1. Vlf/elf radiation patterns of arbitrarily oriented electric and magnetic dipoles in a cold lossless multicomponent magnetoplasma.

    Science.gov (United States)

    Wang, T. N. C.; Bell, T. F.

    1972-01-01

    With the use of a power integral formulation, a study is made of the vlf/elf radiation patterns of arbitrarily oriented electric and magnetic dipoles in a cold lossless multicomponent magnetoplasma. Expressions for the ray patterns are initially developed that apply for arbitrary values of driving frequency, static magnetic-field strength, plasma density, and composition. These expressions are subsequently specialized to vlf/elf radiation in a plasma modeled on the magnetosphere. A series of representative pattern plots are presented for frequencies between the proton and electron gyrofrequencies. These patterns illustrate the fact that focusing effects that arise from the geometrical properties of the refractive index surface tend to dominate the radiation distribution over the entire range from the electron gyrofrequency to 4.6 times the proton gyrofrequency. It is concluded that focusing effects should be of significant importance in the design of a vlf/elf satellite transmitting system in the magnetosphere.

  2. The roles of scene priming and location priming in object-scene consistency effects

    Directory of Open Access Journals (Sweden)

    Nils eHeise

    2014-05-01

    Full Text Available Presenting consistent objects in scenes facilitates object recognition as compared to inconsistent objects. Yet the mechanisms by which scenes influence object recognition are still not understood. According to one theory, consistent scenes facilitate visual search for objects at expected places. Here, we investigated two predictions following from this theory: If visual search is responsible for consistency effects, consistency effects could be weaker (1 with better-primed than less-primed object locations, and (2 with less-primed than better-primed scenes. In Experiments 1 and 2, locations of objects were varied within a scene to a different degree (one, two, or four possible locations. In addition, object-scene consistency was studied as a function of progressive numbers of repetitions of the backgrounds. Because repeating locations and backgrounds could facilitate visual search for objects, these repetitions might alter the object-scene consistency effect by lowering of location uncertainty. Although we find evidence for a significant consistency effect, we find no clear support for impacts of scene priming or location priming on the size of the consistency effect. Additionally, we find evidence that the consistency effect is dependent on the eccentricity of the target objects. These results point to only small influences of priming to object-scene consistency effects but all-in-all the findings can be reconciled with a visual-search explanation of the consistency effect.

  3. Extra $Z^\\prime$s and $W^\\prime$s in Heterotic--String Derived Models

    CERN Document Server

    Faraggi, Alon E

    2015-01-01

    The ATLAS collaboration recently recorded possible excess in the di--boson production at the di--boson invariant mass at around 2 TeV. Such an excess may be produced if there exist additional $Z^\\prime$ and/or $W^\\prime$ at that scale. We survey the extra $Z^\\prime$s and $W^\\prime$s that may arise from semi--realistic heterotic string vacua in the free fermionic formulation in seven distinct cases including: $U(1)_{Z^\\prime}\\in SO(10)$; family universal $U(1)_{Z^\\prime}$ not in $SO(10)$; non--universal $U(1)_{Z^\\prime}$; hidden sector $U(1)$ symmetries and kinetic mixing; left--right symmetric models; Pati--Salam models; leptophobic and custodial symmetries. Each case has a distinct signature associated with the extra symmetry breaking scale. In one of the cases we explore the discovery potential at the LHC using resonant leptoproduction. Existence of extra vector boson with the reported properties will significantly constrain the space of allowed string vacua.

  4. Influence of prime lexicality, frequency, and pronounceability on the masked onset priming effect.

    Science.gov (United States)

    Dimitropoulou, Maria; Duñabeitia, Jon Andoni; Carreiras, Manuel

    2010-09-01

    The present study investigates the origins of the masked onset priming effect (MOPE). There are two alternative interpretations that account for most of the evidence reported on the MOPE, so far. The speech planning account (SP) identifies the locus of the MOPE in the preparation of the speech response. In contrast, the dual-route theory proposes that the effect arises as a result of the processing of the prime by the nonlexical route. In a series of masked onset priming word naming experiments we test the validity of these accounts by manipulating the primes' frequency, their lexical status, and pronounceability. We found consistent MOPEs of similar magnitude with high- and low-frequency prime words as well as with pronounceable nonwords. Contrarily, when primes consisted of unpronounceable consonantal strings the effect disappeared, suggesting that pronounceability of the prime is a prerequisite for the emergence of the MOPE. These results are in accordance with the predictions of the SP account. The pattern of effects obtained in the present study further defines the origins of the MOPE. PMID:20221948

  5. Multiplex Solid-Phase PCR for Rapid Detection and Identification of Salmonella spp. at Sub-species

    DEFF Research Database (Denmark)

    Cao, Cuong; Høgberg, Jonas; Wolff, Anders;

    . Simultaneously on the solid phase, the amplified PCR amplicons interact with the nested DNA probes immobilized on the solid substrate as an array. If the immobilized probes match the sequence of the DNA templates they are extended by the polymerase and serve as template for the second strand elongation primed by......This study presents a solid-phase PCR (SP-PCR) for rapid detection, identification, and sub-typing of various Salmonella species, the major food-borne cause of salmonellosis. The target DNA is firstly amplified with PCR primers (one primer is labeled with fluorophores) in the liquid phase...... the liquid phase primer thus generating new templates for the SP-PCR. After the reaction, PCR products labeled with fluorophores remain attached to the substrate and can be visualized directly by fluorescence readout devices. Using this method, S. enteritidis, S. typhimurium and S. dublin can be...

  6. Elementary proofs of Twin Prime Conjecture and Goldbach's Conjecture

    OpenAIRE

    Belhaouari, Samir Brahim

    2015-01-01

    The idea of generating prime numbers through sequence of sets of co-primes was the starting point of this paper that ends up by proving two conjectures, the existence of infinitely many twin primes and the Goldbach conjecture. The main idea of our approach is summarized on the creation and on the analysing sequence of sets of distinct co-primes with the first $n$ primes, $\\left\\{ p_i :\\, i\\leq n \\right\\}$, and the important properties of the modulus linear combination of the co-prime sets, $H...

  7. Cross-language positive priming disappears, negative priming does not: evidence for two sources of selective inhibition.

    Science.gov (United States)

    Neumann, E; McCloskey, M S; Felio, A C

    1999-11-01

    The authors used a unilingual and bilingual primed lexical decision task to investigate priming effects produced by attended and ignored words. In the unilingual experiment, accelerated lexical decisions to probe target words resulted when the word matched the preceding target word, whereas slowed lexical decisions to probe target words resulted when the word matched the preceding ignored nontarget word. In the bilingual (English-Spanish) experiment, between-language, rather than within-language, priming manipulations were used. Although the ignored repetition negative priming effect replicated across languages, cross-language attended repetition positive priming did not. This dissociation of priming effects in the inter- versus intralanguage priming conditions contradicts episodic retrieval accounts of negative priming that deny the existence of selective inhibitory processes. On the other hand, these results support an extension of inhibition-based accounts of negative priming, because they indicate that inhibition can operate at two levels of abstraction--local word and global language--simultaneously. PMID:10586580

  8. Distribution of Primes and of Interval Prime Pairs Based on $\\Theta$ Function

    CERN Document Server

    Fan, Yifang

    2010-01-01

    $\\Theta$ function is defined based upon Kronecher symbol. In light of the principle of inclusion-exclusion, $\\Theta$ function of sine function is used to denote the distribution of composites and primes. The structure of Goldbach Conjecture has been analyzed, and $\\Xi$ function is brought forward by the linear diophantine equation; by relating to $\\Theta$ function, the interval distribution of composite pairs and prime pairs (i.e. the Goldbach Conjecture) is thus obtained. In the end, Abel's Theorem (Multiplication of Series) is used to discuss the lower limit of the distribution of the interval prime pairs.

  9. Method for priming and DNA sequencing

    Energy Technology Data Exchange (ETDEWEB)

    Mugasimangalam, R.C.; Ulanovsky, L.E.

    1997-12-01

    A method is presented for improving the priming specificity of an oligonucleotide primer that is non-unique in a nucleic acid template which includes selecting a continuous stretch of several nucleotides in the template DNA where one of the four bases does not occur in the stretch. This also includes bringing the template DNA in contract with a non-unique primer partially or fully complimentary to the sequence immediately upstream of the selected sequence stretch. This results in polymerase-mediated differential extension of the primer in the presence of a subset of deoxyribonucleotide triphosphates that does not contain the base complementary to the base absent in the selected sequence stretch. These reactions occur at a temperature sufficiently low for allowing the extension of the non-unique primer. The method causes polymerase-mediated extension reactions in the presence of all four natural deoxyribonucleotide triphosphates or modifications. At this high temperature discrimination occurs against priming sites of the non-unique primer where the differential extension has not made the primer sufficiently stable to prime. However, the primer extended at the selected stretch is sufficiently stable to prime.

  10. 30 CFR 785.17 - Prime farmland.

    Science.gov (United States)

    2010-07-01

    ...; and (4) The proposed operations will be conducted in compliance with the requirements of 30 CFR part... Documents, U.S. Government Printing Office, Washington, DC 20402, Stock Nos. 001-000-02597-0 and 001-000... list of prime farmland soils, their location, physical and chemical characteristics, crop yields,...

  11. Sums of Five Almost Equal Prime Squares

    Institute of Scientific and Technical Information of China (English)

    Claus BAUER

    2005-01-01

    Let Pi, 1 ≤ i ≤ 5, be prime numbers. It is proved that every integer N that satisfies N ≡ 5 (mod 24) can be written as N = p1 2 + p2 2 + p2 3 + P4 2 + p5 2, where |√N5-pi| ≤ N1/2- s19/850+∈.

  12. 30 CFR 716.7 - Prime farmland.

    Science.gov (United States)

    2010-07-01

    ... irrigation, drainage, flood control, and subsurface water managament. The requirement for submission of soil... those lands which are defined by the Secretary of Agriculture in 7 CFR 657 and which have been... their State Conservationist, located in each State. (g) Special requirements. For all prime farmlands...

  13. Thematic Mathematics: The Combinatorics of Prime Factorizations

    Science.gov (United States)

    Griffiths, Martin

    2010-01-01

    In this article, we use a particular example to illustrate a thematic approach to the teaching and learning of mathematics. Our theme, suitable for undergraduates and able sixth-form students, is the enumeration of mathematical objects associated with the prime factorizations of integers. It is shown in detail how this gives rise to some beautiful…

  14. Primes Solutions Of Linear Diophantine Equations

    OpenAIRE

    Carella, N. A.

    2013-01-01

    Let k => 1, m => 1 be small fixed integers, gcd(k, m) = 1. This note develops some techniques for proving the existence of infinitely many primes solutions x = p, and y = q of the linear Diophantine equation y = mx + k.

  15. Maple Explorations, Perfect Numbers, and Mersenne Primes

    Science.gov (United States)

    Ghusayni, B.

    2005-01-01

    Some examples from different areas of mathematics are explored to give a working knowledge of the computer algebra system Maple. Perfect numbers and Mersenne primes, which have fascinated people for a very long time and continue to do so, are studied using Maple and some questions are posed that still await answers.

  16. A Fresh Approach to Prime Numbers.

    Science.gov (United States)

    Hampton, Homer F.

    1979-01-01

    The introduction of prime numbers in the intermediate grades should be handled with care or the concept will appear arbitrary, artificial, and unreal to the pupils. The approach suggested here is in the form of a game-like activity. A knowledge of multiplication and factors is a prerequisite. (BB)

  17. Kunlun Melts into Prime Time of CCTV

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    @@ On November 18, China Central Television (CCTV), the national broadcaster with more than 1 billion viewers, auctioned off its prime-time advertising time for next year at 32.40million yuan. The winner of the bid is lubricants branded as Kunlun from PetroChina Lubricants Company.

  18. Emergence, Self-Organization and Prime Numbers

    Science.gov (United States)

    Berezin, Alexander A.

    1998-04-01

    Pattern of primes (PP) is critical for dynamics of universal emergence, self-organization and complexity ascendance [1-3]. Due to gradual logarithmic dilution of primes (prime number theorem), PP gives only base envelop for above effects. More informative are full factorizational spectra (FS) of all intermediate composites. Tower exponential mappings like f(N) = 10(N)10 with (N) indicating N vertical arrows [4] lead to infinite fractal-like hierarchy of integer trails; say, FS of intervals between f(N) and f(N+1). This allows FAPP-infinite informational content of PP and FS be "used" as catalyzer of emergence dynamics. This is "Platonic pressure effect" (physical embodiments of PP and FS). Said effect may provide more direct picture for cosmogenesis than traditional quantum tunneling ("Big Bang") and/or inflationary scenarios. Furthermore, we can speculate that metrics of (Mega)universe at tower exponential scales becomes asymptotically Euclidean (multi or infinitely dimensional), due to unchangability of PP and FS. - [1] Arnold Arnold, "The Corrupted Sciences", Paladin (Harper Collins), 1992; [2] Peter Plichta, "God's Secret Formula: Deciphering the Riddle of the Universe and the Prime Number Code", Element, 1997; [3] Alexander Berezin, URAM Journal, 20, 72 (1997); [4] Donald E. Knuth, Science, 194, 1235, 17 Dec 1976. abstract.

  19. On combinatorial formula for the prime form

    Czech Academy of Sciences Publication Activity Database

    Zuevsky, Alexander

    2014-01-01

    Roč. 9, č. 17 (2014), s. 107-110. ISSN 1822-511X Institutional support: RVO:67985840 Keywords : prime forms * vertex algebras * correlation functions Subject RIV: BA - General Mathematics http://siauliaims.su.lt/index.php?option=com_content&view=article&id=379&Itemid=7

  20. From the 'PCR' function to the 'PCR' profession

    International Nuclear Information System (INIS)

    After having recalled the legal context concerning the appointment and training of a radiation protection expert (PCR for 'personne competente en radioprotection'), the author outlines that the PCR's role has notably evolved: his function is now of primary importance in the company and his activity does not correspond to the legal framework any longer. Moreover, with the application of a European directive, some small establishments possessing ionizing radiation sources are disadvantaged, and the PCR is now facing an increasing number of missions and tasks. The author gives a list of them and assesses a needed time of 146 days per year: this means PCRs cannot have an other activity within their company

  1. A function to calculate all relative prime numbers up to the product of the first n primes

    OpenAIRE

    Schmitt, Matthias

    2014-01-01

    We prove an isomorphism between the finite domain from 1 up to the product of the first n primes and the new defined set of prime modular numbers. This definition provides some insights about relative prime numbers. We provide an inverse function from the prime modular numbers into this finite domain. With this function we can calculate all numbers from 1 up to the product of the first n primes that are not divisible by the first n primes. This function provides a non sequential way for the c...

  2. Distribution of Primes and of Interval Prime Pairs Based on $\\Theta$ Function

    OpenAIRE

    Fan, Yifang; Li, Zhiyu

    2010-01-01

    $\\Theta$ function is defined based upon Kronecher symbol. In light of the principle of inclusion-exclusion, $\\Theta$ function of sine function is used to denote the distribution of composites and primes. The structure of Goldbach Conjecture has been analyzed, and $\\Xi$ function is brought forward by the linear diophantine equation; by relating to $\\Theta$ function, the interval distribution of composite pairs and prime pairs (i.e. the Goldbach Conjecture) is thus obtained. In the end, Abel's ...

  3. Priming healthy eating. You can't prime all the people all of the time

    OpenAIRE

    Forwood, Suzanna E.; Ahern, Amy L; Hollands, Gareth J; Ng, Yin-Lam; Marteau, Theresa M

    2015-01-01

    Objective In the context of a food purchasing environment filled with advertising and promotions, and an increased desire from policy makers to guide individuals toward choosing healthier foods, this study tests whether priming methods that use healthy food adverts to increase preference for healthier food generalize to a representative population. MethodsIn two studies (Study 1 n = 143; Study 2 n = 764), participants were randomly allocated to a prime condition, where they viewed fruit and v...

  4. Shifting evaluation windows : predictable forward primes with long SOAs eliminate the impact of backward primes.

    OpenAIRE

    Daniel A Fockenberg; Sander L Koole; Daniël Lakens; Semin, Gün R.

    2013-01-01

    Shifting Evaluation Windows: Predictable Forward Primes with Long SOAs Eliminate the Impact of Backward Primes Daniel A. Fockenberg1*, Sander L. Koole2, Danie¨ l Lakens3, Gu¨ n R. Semin4,5 1 Institut fu¨ r Psychologie, Albert-Ludwigs-Universita¨t Freiburg, Freiburg, Germany, 2 Department of Clinical Psychology, VU University Amsterdam, Amsterdam, The Netherlands, 3 Eindhoven University of Technology, Eindhoven, The Netherlands, 4 Royal Netherlands Academy for Arts and Sciences,...

  5. On prime ideals and associated spectrum of BCK-algebras

    International Nuclear Information System (INIS)

    In this paper we study prime ideals and define the spectrum of a bounded commutative BCK-algebra. We also obtain a characterization of minimal prime (lattice) ideals of these algebras. (author). 8 refs, 4 tabs

  6. Finding Cliques of a Graph using Prime Numbers

    OpenAIRE

    Kulkarni, Dhananjay D.; Verma, Shekhar; Prashant

    2006-01-01

    This paper proposes a new algorithm for solving maximal cliques for simple undirected graphs using the theory of prime numbers. A novel approach using prime numbers is used to find cliques and ends with a discussion of the algorithm.

  7. Applications of Smarandache Function, and Prime and Coprime Functions

    OpenAIRE

    Ruiz, Sebastián Martín

    2002-01-01

    A book for people who love numbers: Smarandache Function applied to perfect numbers, congruences. Also, the Smarandache Prime and Coprime functions in connection with the expressions of the prime numbers.

  8. Prime Numbers, quantum field theory and the Goldbach conjecture

    OpenAIRE

    Sanchis Lozano, Miguel Ángel; Barbero González, J. Fernando; Navarro Salas, José

    2012-01-01

    Motivated by the Goldbach conjecture in Number Theory and the abelian bosonization mechanism on a cylindrical two-dimensional spacetime we study the reconstruction of a real scalar field as a product of two real fermion (so-called \\textit{prime}) fields whose Fourier expansion exclusively contains prime modes. We undertake the canonical quantization of such prime fields and construct the corresponding Fock space by introducing creation operators $b_{p}^{\\dag}$ --labeled by prime numbers $p$--...

  9. On algebraic structure of the set of prime numbers

    OpenAIRE

    Zahedi, Ramin

    2012-01-01

    The set of prime numbers has been analyzed, based on their algebraic and arithmetical structure. Here by obtaining a sort of linear formula for the set of prime numbers, they are redefined and identified; under a systematic procedure it has been shown that the set of prime numbers is combinations (unions and intersections) of some subsets of natural numbers, with more primary structures. In fact generally, the logical essence of obtained formula for prime numbers is similar to formula 2n - 1 ...

  10. On the differences between consecutive prime numbers, I

    OpenAIRE

    Goldston, D. A.; Ledoan, A. H.

    2011-01-01

    We show by an inclusion-exclusion argument that the prime $k$-tuple conjecture of Hardy and Littlewood provides an asymptotic formula for the number of consecutive prime numbers which are a specified distance apart. This refines one aspect of a theorem of Gallagher that the prime $k$-tuple conjecture implies that the prime numbers are distributed in a Poisson distribution around their average spacing.

  11. Relationships and Algorithm in order to achieve the Largest Primes

    OpenAIRE

    Zalnezhad, A.; Shabani, G.; Zalnezhad, H.; Zalnezhad, M.

    2015-01-01

    Today, prime numbers attained exceptional situation in the area of numbers theory and cryptography. As we know, the trend for accessing to the largest prime numbers due to using Mersenne theorem, although resulted in vast development of related numbers, however it has reduced the speed of accessing to prime numbers from one to five years. This paper could attain to theorems that are more extended than Mersenne theorem with accelerating the speed of accessing to prime numbers. Since that time,...

  12. The spiral code of prime numbers

    Directory of Open Access Journals (Sweden)

    Vinoo Cameron

    2013-03-01

    Full Text Available Notice: The Final Frontier in Mathematics: The author has nearly finished work on the polarity of the divergence/convergence of the half line prime number values described for the first time in history by this author. Thus the spiral calculus will be unraveled in time and all prime number placements identified and predicted.  The stated values at 30 constant for the half line values are as follows. The, following are the divergence codes for the half-line numbers at 1:3, (10*3. SIMPLE BASIC MATHEMATICS!!! . The “sui generis” for prime number variability at 1:3 divergences is based on the following line values at 10*3 Constant. 12=+6 14=+2 16=-2 18=-6 20=-10 22=-14 24=-18 28=-26 30=-30 32=-5 34=-7 36=-42 The, value at 100 half value is -170 The readers will not be offered the final work on the spiral calculus, which is the so called “mathematical writing on the wall”, a no brainer. The author will complete that on his own time, and current mathematicians are invited to finish it too without that inspiration of George Riemann/ Einstein, etc. The author first confirms the divergence/ convergence of 19 here at exact 1:3 and 1:6 as per well published manuscripts. Secondly the author presents a continuous prime number sieve at proportion 6, which is mathematically distinct from the sieve of Eratosthenes, first in history, tested by 10 million sieved numbers. Thirdly the author presents the half-line value of each and every prime number, and that is the first in history to present the spiral placement of prime number this is the evidence for a spiral placement of prime number and the essential half-line values. The unique relationship of space is presented here as a signature equation, based on the published divergence of empty space at 1:3 and 1:6   The gist of this manuscript is the clear mathematical proof that there is a mathematical disconnect between the linear mathematics as developed by man, and the primordial spiral planes and the

  13. Highly Specific Detection of Five Exotic Quarantine Plant Viruses using RT-PCR

    OpenAIRE

    Choi, Hoseong; Cho, Won Kyong; Yu, Jisuk; Lee, Jong-Seung; Kim, Kook-Hyung

    2013-01-01

    To detect five plant viruses (Beet black scorch virus, Beet necrotic yellow vein virus, Eggplant mottled dwarf virus, Pelargonium zonate spot virus, and Rice yellow mottle virus) for quarantine purposes, we designed 15 RT-PCR primer sets. Primer design was based on the nucleotide sequence of the coat protein gene, which is highly conserved within species. All but one primer set successfully amplified the targets, and gradient PCRs indicated that the optimal temperature for the 14 useful prime...

  14. Then We Characterize Primes and Composite Numbers Via Divisibility

    Directory of Open Access Journals (Sweden)

    Ikorong Gilbert

    2013-12-01

    Full Text Available In this paper, we show a Theorem which helps us to characterize prime numbers and composite numbers via divisibility; and we use the characterizations of primes and composite numbers to characterize twin primes, Mersenne primes, even perfect numbers, Sophie Germain primes, Fermat primes, Fermat composite numbers and Mersenne composite numbers (we recall that a logic (non recursive proof of problems posed by twin primes, Mersenne primes, perfect numbers, Sophie Germain primes, Fermat primes, Fermat composite numbers and Mersenne composite numbers, is given in [12]. [[ Prime numbers are well kwown ( see [15] or [19] and we recall that a composite number is a non prime number. We recall (see [1] or [2] or [3] or [6] or [9] or [10] or [12] or [13] or [14] or [17] that a {\\it{Fermat prime }} is a prime of the form F_{n}=2^{2^{n}}+1, where n is an integer \\geq 0; and a {\\it{Fermat composite}}  is a non prime number of the form F_{n}=2^{2^{n}}+1, where n is an integer \\geq 1; it is known that for every j\\in \\lbrace 0, 1,2,3,4\\rbrace, F_{j} is a Fermat prime,  and it is also known that F_{5} and F_{6} are Fermat composite. We recall (see [11] that a prime h is called a {\\it{Sophie Germain prime}}, if both h and 2h+1 are prime; the first few Sophie Germain primes are 2, 3,5,11,23,29,41, ...; it is easy to check that 233 is a Sophie  Germain prime. A {\\it{Mersenne prime }} (see [6] or [10] or [11] or [16] or [19] or [20] or [21] is a prime of the form M_{m}=2^{m}-1, where m is prime; for example M_{13} and M_{19} are Mersenne prime. A Mersenne composite ( see [7] or [9]  is a non prime number of the form M_{m}=2^{m}-1, where m is prime; it is known that M_{11} and M_{67} are Mersenne composite. We also recall (see [4] or [5] or [7] or [8] or [10] or [11] or [18] or [19] or [20] or [22] that an integer t is a twin prime, if t is a prime \\geq 3 and if t-2 or t+2 is also a prime \\geq 3; for example, it is easy to check that (881,883 is a

  15. Space-Valence Priming with Subliminal and Supraliminal Words

    Directory of Open Access Journals (Sweden)

    Ulrich eAnsorge

    2013-02-01

    Full Text Available To date it is unclear whether (1 awareness-independent non-evaluative semantic processes influence affective semantics and whether (2 awareness-independent affective semantics influence non-evaluative semantic processing. In the current study, we investigated these questions with the help of subliminal (masked primes and visible targets in a space-valence across-category congruence effect. In line with (1, we found that subliminal space prime words influenced valence classification of supraliminal target words (Experiment 1: Classifications were faster with a congruent prime (e.g., the prime ‘up’ before the target ‘happy’ than with an incongruent prime (e.g., the prime ‘up’ before the target ‘sad’. In contrast to (2, no influence of subliminal valence primes on the classification of supraliminal space targets into up- and down-words was found (Experiment 2. Control conditions showed that standard masked response-priming effects were found with both subliminal prime types, and that an across-category congruence effect was also found with supraliminal valence primes and spatial target words. The final Experiment 3 confirmed that the across-category congruence effect indeed reflected priming of target categorization of a relevant meaning category. Together, the data jointly confirmed prediction (1 that awareness-independent non-evaluative semantic priming influences valence judgments.

  16. Attentional Control and the Relatedness Proportion Effect in Semantic Priming

    Science.gov (United States)

    Hutchison, Keith A.

    2007-01-01

    In 2 experiments, participants completed both an attentional control battery (OSPAN, antisaccade, and Stroop tasks) and a modified semantic priming task. The priming task measured relatedness proportion (RP) effects within subjects, with the color of the prime indicating the probability that the to-be-named target would be related. In Experiment…

  17. The Nature of Affective Priming in Music and Speech

    NARCIS (Netherlands)

    Goerlich, K.S.; Witteman, J.; Schiller, N.O.; Van Heuven, V.J.; Aleman, A.; Martens, S.

    2012-01-01

    The phenomenon of affective priming has caught scientific interest for over 30 years, yet the nature of the affective priming effect remains elusive. This study investigated the underlying mechanism of cross-modal affective priming and the influence of affective incongruence in music and speech on n

  18. Regularities of Twin, Triplet and Multiplet Prime Numbers

    OpenAIRE

    Weber, H. J.

    2011-01-01

    Classifications of twin primes are established and then applied to triplets that generalize to all higher multiplets. Mersenne and Fermat twins and triplets are treated in this framework. Regular prime number multiplets are related to quadratic and cubic prime number generating polynomials.

  19. On the Prime Whales of a Boolean Algebra

    OpenAIRE

    Holland, Jason

    2013-01-01

    In this note, we introduce objects called prime whales and use them to represent a Boolean algebra as an algebra of sets in a way that is analogous to Stone's Representation Theorem. We also characterize the existence of prime whales in terms of the existence of prime ideals.

  20. Euclidean Primes Have the Minimum Number of Primitive Roots

    Czech Academy of Sciences Publication Activity Database

    Křížek, Michal; Somer, L.

    2008-01-01

    Roč. 12, č. 1 (2008), s. 121-127. ISSN 0972-5555 R&D Projects: GA AV ČR(CZ) IAA100190803 Institutional research plan: CEZ:AV0Z10190503 Keywords : Euclidean prime s * Fermat prime s * Sophie Germain prime s Subject RIV: BA - General Mathematics

  1. Origin of visible and near-infrared photoluminescence from chemically etched Si nanowires decorated with arbitrarily shaped Si nanocrystals.

    Science.gov (United States)

    Ghosh, Ramesh; Giri, P K; Imakita, Kenji; Fujii, Minoru

    2014-01-31

    Arrays of vertically aligned single crystalline Si nanowires (NWs) decorated with arbitrarily shaped Si nanocrystals (NCs) have been fabricated by a silver assisted wet chemical etching method. Scanning electron microscopy and transmission electron microscopy are performed to measure the dimensions of the Si NWs as well as the Si NCs. A strong broad band and tunable visible (2.2 eV) to near-infrared (1.5 eV) photoluminescence (PL) is observed from these Si NWs at room temperature (RT). Our studies reveal that the Si NCs are primarily responsible for the 1.5-2.2 eV emission depending on the cross-sectional area of the Si NCs, while the large diameter Si/SiOx NWs yield distinct NIR PL consisting of peaks at 1.07, 1.10 and 1.12 eV. The latter NIR peaks are attributed to TO/LO phonon assisted radiative recombination of free carriers condensed in the electron-hole plasma in etched Si NWs observed at RT for the first time. Since the shape of the Si NCs is arbitrary, an analytical model is proposed to correlate the measured PL peak position with the cross-sectional area (A) of the Si NCs, and the bandgap (E(g)) of nanostructured Si varies as E(g) = E(g) (bulk) + 3.58 A(-0.52). Low temperature PL studies reveal the contribution of non-radiative defects in the evolution of PL spectra at different temperatures. The enhancement of PL intensity and red-shift of the PL peak at low temperatures are explained based on the interplay of radiative and non-radiative recombinations at the Si NCs and Si/SiO(x) interface. Time resolved PL studies reveal bi-exponential decay with size correlated lifetimes in the range of a few microseconds. Our results help to resolve a long standing debate on the origin of visible-NIR PL from Si NWs and allow quantitative analysis of PL from arbitrarily shaped Si NCs. PMID:24394591

  2. On the union of graded prime ideals

    Directory of Open Access Journals (Sweden)

    Uregen Rabia Nagehan

    2016-04-01

    Full Text Available In this paper we investigate graded compactly packed rings, which is defined as; if any graded ideal I of R is contained in the union of a family of graded prime ideals of R, then I is actually contained in one of the graded prime ideals of the family. We give some characterizations of graded compactly packed rings. Further, we examine this property on h – Spec(R. We also define a generalization of graded compactly packed rings, the graded coprimely packed rings. We show that R is a graded compactly packed ring if and only if R is a graded coprimely packed ring whenever R be a graded integral domain and h – dim R = 1.

  3. Density of Primes in -th Power Residues

    Indian Academy of Sciences (India)

    R Balasubramanian; Prem Prakash Pandey

    2013-02-01

    Given a prime number , a finite set of integers $S=\\{a_1,\\ldots,a_m\\}$ and many -th roots of unity $^{r_i}_l,i=1,\\ldots,m$ we study the distribution of primes in $\\mathbb{Q}(_l)$ such that the -th residue symbol of $a_i$ with respect to is $^{r_i}_l$, for all . We find out that this is related to the degree of the extension $\\mathbb{Q}\\left(a^{\\frac{1}{l}}_1,\\ldots,a^{\\frac{1}{l}}_m\\right)/\\mathbb{Q}$. We give an algorithm to compute this degree. Also we relate this degree to rank of a matrix obtained from $S=\\{a_1,\\ldots,a_m\\}$. This latter argument enables one to describe the degree $\\mathbb{Q}\\left(a^{\\frac{1}{l}}_1,\\ldots,a^{\\frac{1}{l}}_m\\right)/\\mathbb{Q}$ in much simpler terms.

  4. Prime-Minister of Malta visits CERN

    CERN Multimedia

    2008-01-01

    The Prime-Minister of Malta, Dr Lawrence Gonzi, visited CERN and met Director-General, Robert Aymar, on 10 January. The Prime-Minister of Malta, Dr Lawrence Gonzi, and CERN Director-General, Robert Aymar, signed a cooperation agreement. Dr Gonzi was given guided tours of the CMS experiment at Point 5 in Cessy and of the LHC magnet test facility, in which his country was involved. One of the high points of the day was the signing of a cooperation agreement between CERN and the Government of the Republic of Malta, aimed at the development of scientific and technical collaboration. "I’m really enthusiastic about this agreement, which constitutes a first step towards real collaboration between the Maltese government and CERN," said Nicholas Sammut, a Maltese engineer at CERN who was present throughout the visit (on the right). See also the video.

  5. Random Walk on the Prime Numbers

    International Nuclear Information System (INIS)

    The one-dimensional random walk (RW), where steps up and down are performed according to the occurrence of special primes is defined. Some quantities characterizing RW are investigated. The mean fluctuation function F(l) displays perfect power law dependence F(l) ∼ l1/2 indicating that the defined RW is not correlated. The number of returns of this special RW to the origin is investigated. It turns out, that this single, very special, realization of RW is typical one in the sense, that the usual characteristics used to measure RW, take the values close to the ones averaged over all random walks. The fractal structure on the subset of primes is also found. (author)

  6. Average prime-pair counting formula

    Science.gov (United States)

    Korevaar, Jaap; Riele, Herman Te

    2010-04-01

    Taking r>0 , let π_{2r}(x) denote the number of prime pairs (p, p+2r) with p≤ x . The prime-pair conjecture of Hardy and Littlewood (1923) asserts that π_{2r}(x)˜ 2C_{2r} {li}_2(x) with an explicit constant C_{2r}>0 . There seems to be no good conjecture for the remainders ω_{2r}(x)=π_{2r}(x)- 2C_{2r} {li}_2(x) that corresponds to Riemann's formula for π(x)-{li}(x) . However, there is a heuristic approximate formula for averages of the remainders ω_{2r}(x) which is supported by numerical results.

  7. Imbibitions, energy test and accelerated ageing in primed and non-primed seeds of Peltophorum dubium

    Institute of Scientific and Technical Information of China (English)

    LILei-hong; ZHANGWan-li; ZUYuan-gang; SONIAPerez

    2005-01-01

    Peltophorum dubium seeds were set to imbibe with four treatments, soaked with solution Captan 0.2% under 10and 27℃,PEG 6000 -1.0 MPa under 10 and 27℃. For each treatment there were four replicates with 40 seeds incubated in 9-cm Petri dishes with double filter paper moistened with testing solution. The imbibition curves showed that the final weight increase were from 70% to 150% in the treatments when imbibition entered a lag phase. Seeds were tested for effects on germination of five treatments: control group (nonprimed), primed with PEG6000 -1.0 MPa at 10 and 27℃, primed with Captan 0.2% at 10 and 27℃. For each treatment, there were three sub-treatments: seeds were soaked in distilled water for 12, 24 and 36h before the energy test. Germination percentages of nonprimed seeds and primed in PEG 27℃ soaked in distilled water during 12 h were the highest, reaching 100%. The lowest germination percentage occurred primed seeds with PEG6000 27℃ and soaked in distilled water during 36 h, which was only 52%. Germination mean time of primed seeds in PEG at 10℃, soaked 24 h was 1.08 days, mean time of primed seeds in PEG at 27℃ soaked 12 h was 2.42 days. Accelerated ageing results showed low or no germination after ageing 72 h. Control group had a higher germination percentage and seeds were more resistant to deterioration than those in primed groups, both in Petri dish (27℃) and vermiculate (room temperature).

  8. Learning PrimeFaces extensions development

    CERN Document Server

    Jonna, Sudheer

    2014-01-01

    This book provides a step by step approach that explains the most important extension components and their features. All the major features are explained by using the JobHub application with supporting screenshots.If you are an intermediate to advanced level user (or developer) who already has a basic working knowledge of PrimeFaces, then this book is for you.The only thing you need to know is Java Server Faces(JSF).

  9. The horocycle flow at prime times

    CERN Document Server

    Sarnak, P

    2011-01-01

    We prove that the orbit of a generic point at prime values of the horocycle flow in the modular surface is dense in a set of positive measure; for some special orbits we also prove that they are dense in the whole space (assuming the Ramanujan/Selberg conjectures for GL(2)/Q). In the process, we derive an effective version of Dani's Theorem for the (discrete) horocycle flow.

  10. Priming Cooperation in Social Dilemma Games

    OpenAIRE

    Drouvelis, Michalis; Metcalfe, Robert; Powdthavee, Nattavudh

    2010-01-01

    Research on public goods mainly focuses its attention on the ability of incentives, beliefs and group structure to affect behaviour in social dilemma interactions. This paper investigates the pure effects of a rather subtle mechanism on social preferences in a one-shot linear public good game. Using priming techniques from social psychology, we activate the concept of cooperation and explore the extent to which this intervention brings about changes in people's voluntary contributions to the ...

  11. Prime rings with PI rings of constants

    CERN Document Server

    Kharchenko, V K; Rodríguez-Romo, S

    1996-01-01

    It is shown that if the ring of constants of a restricted differential Lie algebra with a quasi-Frobenius inner part satisfies a polynomial identity (PI) then the original prime ring has a generalized polynomial identitiy (GPI). If additionally the ring of constants is semiprime then the original ring is PI. The case of a non-quasi-Frobenius inner part is also considered.

  12. Detecting Prime Numbers via Roots of Polynomials

    Science.gov (United States)

    Dobbs, David E.

    2012-01-01

    It is proved that an integer n [greater than or equal] 2 is a prime (resp., composite) number if and only if there exists exactly one (resp., more than one) nth-degree monic polynomial f with coefficients in Z[subscript n], the ring of integers modulo n, such that each element of Z[subscript n] is a root of f. This classroom note could find use in…

  13. Flavour of fundamental particles and prime numbers

    International Nuclear Information System (INIS)

    The discreteness and continuity as described by the ratio of the discreteness of the n's and the continuous spread of n/2n, which is directly connected with the width and lifetimes of fundamental particles, the flavours of fundamental particles can be directly obtained. The behaviour of beta decay and the energy levels of light nuclei can also be predicted. The appearance of primes also seems to suggest that further application of reductionism to fundamental particles is not possible

  14. Priming Analogical Reasoning with False Memories

    OpenAIRE

    Howe, M. L.; Garner, S. R.; Threadgold, E.; Ball, L. J.

    2015-01-01

    Like true memories, false memories are capable of priming answers to insight-based problems. Recent research has attempted to extend this paradigm to more advanced problem-solving tasks, including those involving verbal analogical reasoning. However, these experiments are constrained inasmuch as problem solutions could be generated via spreading activation mechanisms (much like false memories themselves) rather than using complex reasoning processes. In three experiments we examined false mem...

  15. Jumping champions and gaps between consecutive primes

    CERN Document Server

    Goldston, D A

    2009-01-01

    For any real $x$, the most common difference that occurs among the consecutive primes less than or equal to $x$ is called a jumping champion. This term was introduced by J. H. Conway in 1993. There are occasionally ties. Therefore there can be more than one jumping champion for a given $x$. The first, but short-lived, jumping champion is 1. Aside from the numerical studies, nothing else has been proved for other jumping champions as $x$ increases. In 1999 A. Odlyzko, M. Rubinstein, and M. Wolf formulated, on the basis of heuristic and empirical evidence, the conjecture that the numbers greater than 1 that are jumping champions are 4 and the sequence of primorials 2, 6, 30, 210, 2310, .... The authors pointed out that this conjecture is not a direct consequence of other deep conjectures concerning primes. Therefore they made a weaker and possibly more accessible conjecture, that any fixed prime $p$ divides all sufficiently large jumping champions. In the present paper we shall extend the work of P. Erd\\H{o}s a...

  16. Trans-generational immune priming in honeybees.

    Science.gov (United States)

    Hernández López, Javier; Schuehly, Wolfgang; Crailsheim, Karl; Riessberger-Gallé, Ulrike

    2014-06-22

    Maternal immune experience acquired during pathogen exposure and passed on to progeny to enhance resistance to infection is called trans-generational immune priming (TgIP). In eusocial insects like honeybees, TgIP would result in a significant improvement of health at individual and colony level. Demonstrated in invertebrates other than honeybees, TgIP has not yet been fully elucidated in terms of intensity and molecular mechanisms underlying this response. Here, we immune-stimulated honeybee queens with Paenibacillus larvae (Pl), a spore-forming bacterium causing American Foulbrood, the most deadly bee brood disease worldwide. Subsequently, offspring of stimulated queens were exposed to spores of Pl and mortality rates were measured to evaluate maternal transfer of immunity. Our data substantiate the existence of TgIP effects in honeybees by direct evaluation of offspring resistance to bacterial infection. A further aspect of this study was to investigate a potential correlation between immune priming responses and prohaemocytes-haemocyte differentiation processes in larvae. The results point out that a priming effect triggers differentiation of prohaemocytes to haemocytes. However, the mechanisms underlying TgIP responses are still elusive and require future investigation. PMID:24789904

  17. Popular values of the largest prime divisor function

    OpenAIRE

    McNew, Nathan

    2015-01-01

    We consider the distribution of the largest prime divisor of the integers in the interval $[2,x]$, and investigate in particular the mode of this distribution, the prime number(s) which show up most often in this list. In addition to giving an asymptotic formula for this mode as $x$ tends to infinity, we look at the set of those prime numbers which, for some value of $x$, occur most frequently as the largest prime divisor of the integers in the interval $[2,x]$. We find that many prime number...

  18. About the logic of the prime number distribution

    OpenAIRE

    Hahn, Harry K.

    2008-01-01

    There are two basic number sequences which play a major role in the prime number distribution. The first Number Sequence SQ1 contains all prime numbers of the form 6n+5 and the second Number Sequence SQ2 contains all prime numbers of the form 6n+1. All existing prime numbers seem to be contained in these two number sequences, except of the prime numbers 2 and 3. Riemanns Zeta Function also seems to indicate, that there is a logical connection between the mentioned number sequences and the dis...

  19. Simultaneous multiplex PCR detection of seven cucurbit-infecting viruses.

    Science.gov (United States)

    Kwon, Ji Yeon; Hong, Jin Sung; Kim, Min Jea; Choi, Sun Hee; Min, Byeong Eun; Song, Eun Gyeong; Kim, Hyun Hee; Ryu, Ki Hyun

    2014-09-01

    Two multiplex polymerase chain reaction (PCR) systems using dual priming oligonucleotide (DPO) primers were developed for the simultaneous detection of seven cucurbit-infecting viruses. One system allows for the detection of papaya ringspot virus, watermelon mosaic virus, and zucchini yellow mosaic virus, whereas the other permits the detection of cucumber green mottle mosaic virus, cucumber fruit mottle mosaic virus, kyuri green mottle mosaic virus, and zucchini green mottle mosaic virus. Viral species-specific DPO primers developed in this study detected as little as 10 fg/μl of viral RNA under monoplex conditions and 10 pg/μl of viral RNA under multiplex conditions. Multiplex PCR using the DPO primer sets was capable of amplifying viral genes at annealing temperatures ranging from 53 °C to 63 °C. Whereas the use of conventional primers gave rise to non-specific bands, the DPO primers detected target viral genes in the absence of non-specific amplification. When these DPO multiplex primer sets were applied to virus-infected cucurbit samples obtained in the field, multiple infection as well as single infection was accurately identified. This novel approach could also detect multiple viruses in infected seeds. The reliability of multiplex PCR systems using DPO primers for plant virus detection is discussed. PMID:24937806

  20. A study of PCR inhibition mechanisms using real time PCR.

    Science.gov (United States)

    Opel, Kerry L; Chung, Denise; McCord, Bruce R

    2010-01-01

    In this project, real time polymerase chain reaction (PCR) was utilized to study the mechanism of PCR inhibition through examination of the effect of amplicon length, melting temperature, and sequence. Specifically designed primers with three different amplicon lengths and three different melting temperatures were used to target a single homozygous allele in the HUMTH01 locus. The effect on amplification efficiency for each primer pair was determined by adding different concentrations of various PCR inhibitors to the reaction mixture. The results show that a variety of inhibition mechanisms can occur during the PCR process depending on the type of co-extracted inhibitor. These include Taq inhibition, DNA template binding, and effects on reaction efficiency. In addition, some inhibitors appear to affect the reaction in more than one manner. Overall we find that amplicon size and melting temperature are important in some inhibition mechanisms and not in others and the key issue in understanding PCR inhibition is determining the identity of the interfering substance. PMID:20015162

  1. Axial and transverse acoustic radiation forces on a fluid sphere placed arbitrarily in Bessel beam standing wave tweezers

    Energy Technology Data Exchange (ETDEWEB)

    Mitri, F.G., E-mail: mitri@chevron.com

    2014-03-15

    The axial and transverse radiation forces on a fluid sphere placed arbitrarily in the acoustical field of Bessel beams of standing waves are evaluated. The three-dimensional components of the time-averaged force are expressed in terms of the beam-shape coefficients of the incident field and the scattering coefficients of the fluid sphere using a partial-wave expansion (PWE) method. Examples are chosen for which the standing wave field is composed of either a zero-order (non-vortex) Bessel beam, or a first-order Bessel vortex beam. It is shown here, that both transverse and axial forces can push or pull the fluid sphere to an equilibrium position depending on the chosen size parameter ka (where k is the wave-number and a the sphere’s radius). The corresponding results are of particular importance in biophysical applications for the design of lab-on-chip devices operating with Bessel beams standing wave tweezers. Moreover, potential investigations in acoustic levitation and related applications in particle rotation in a vortex beam may benefit from the results of this study. -- Highlights: •The axial and transverse forces on a fluid sphere in acoustical Bessel beams tweezers are evaluated. •The attraction or repulsion to an equilibrium position in the standing wave field is examined. •Potential applications are in particle manipulation using standing waves.

  2. Axial and transverse acoustic radiation forces on a fluid sphere placed arbitrarily in Bessel beam standing wave tweezers

    Science.gov (United States)

    Mitri, F. G.

    2014-03-01

    The axial and transverse radiation forces on a fluid sphere placed arbitrarily in the acoustical field of Bessel beams of standing waves are evaluated. The three-dimensional components of the time-averaged force are expressed in terms of the beam-shape coefficients of the incident field and the scattering coefficients of the fluid sphere using a partial-wave expansion (PWE) method. Examples are chosen for which the standing wave field is composed of either a zero-order (non-vortex) Bessel beam, or a first-order Bessel vortex beam. It is shown here, that both transverse and axial forces can push or pull the fluid sphere to an equilibrium position depending on the chosen size parameter ka (where k is the wave-number and a the sphere's radius). The corresponding results are of particular importance in biophysical applications for the design of lab-on-chip devices operating with Bessel beams standing wave tweezers. Moreover, potential investigations in acoustic levitation and related applications in particle rotation in a vortex beam may benefit from the results of this study.

  3. Cavity-excited Huygens' metasurface antennas for near-unity aperture illumination efficiency from arbitrarily large apertures

    Science.gov (United States)

    Epstein, Ariel; Wong, Joseph P. S.; Eleftheriades, George V.

    2016-01-01

    One of the long-standing problems in antenna engineering is the realization of highly directive beams using low-profile devices. In this paper, we provide a solution to this problem by means of Huygens' metasurfaces (HMSs), based on the equivalence principle. This principle states that a given excitation can be transformed to a desirable aperture field by inducing suitable electric and (equivalent) magnetic surface currents. Building on this concept, we propose and demonstrate cavity-excited HMS antennas, where the single-source-fed cavity is designed to optimize aperture illumination, while the HMS facilitates the current distribution that ensures phase purity of aperture fields. The HMS breaks the coupling between the excitation and radiation spectra typical to standard partially reflecting surfaces, allowing tailoring of the aperture properties to produce a desirable radiation pattern, without incurring edge-taper losses. The proposed low-profile design yields near-unity aperture illumination efficiencies from arbitrarily large apertures, offering new capabilities for microwave, terahertz and optical radiators.

  4. Arbitrarily-shaped bursts of picosecond pulses from a fiber laser source for high-throughput applications

    Science.gov (United States)

    Desbiens, Louis; Drolet, Mathieu; Roy, Vincent; Sisto, Marco M.; Taillon, Yves

    2011-02-01

    Increasing the ablation efficiency of picosecond laser sources can be performed by bunching pulses in bursts1 and benefit from heat accumulation effects2-5 in the target. Pulsed fiber lasers are well suited for such a regime of operation, as the single pulse energy in a fiber is limited by the onset of nonlinear effects (SPM, SRS). Increasing the number of pulses to form a burst of pulses allows for average power scaling of picosecond fiber lasers. We are presenting in this paper a high-power fiber laser emitting arbitrarily-shaped bursts of picosecond pulses at 20 W of average output power. Burst duration can be varied from 2.5 ns to 80 ns. The burst repetition rate is externally triggered and can be varied from 100 kHz to 1 MHz. The single pulse duration is 60 ps and the repetition rate within a burst is 1.8 GHz. The output beam is linearly polarized (PER > 20 dB) and its M2 value is smaller than 1.15. The laser source has a tunable central wavelength around 1064 nm and a spectral linewidth compatible with frequency conversion. Conversion efficiency higher than 60% has been obtained at 10 W of 1064-nm output power.

  5. Formal deduction of the Saint-Venant-Exner model including arbitrarily sloping sediment beds and associated energy

    CERN Document Server

    Fernández-Nieto, E D; Narbona-Reina, G; Zabsonré, J D

    2015-01-01

    In this work we present a deduction of the Saint-Venant-Exner model through an asymptotic analysis of the Navier-Stokes equations. A multi-scale analysis is performed in order to take into account that the velocity of the sediment layer is smaller than the one of the fluid layer. This leads us to consider a shallow water type system for the fluid layer and a lubrication Reynolds equation for the sediment one. This deduction provides some improvements with respect to the classical Saint-Venant-Exner model: (i) the deduced model has an associated energy. Moreover, it allows us to explain why classical models do not have an associated energy and how to modify them in order to recover a model with this property. (ii) The model incorporates naturally a necessary modification that must be taken into account in order to be applied to arbitrarily sloping beds. Furthermore, we show that this modification is different of the ones considered classically, and that it coincides with a classical one only if the solution ha...

  6. Gravitomagnetic draconitic clock effect for inclined and quasi-circular orbits around a spinning body arbitrarily oriented in space

    CERN Document Server

    Iorio, Lorenzo

    2014-01-01

    In the weak-field and slow-motion approximation of general relativity, the rotation of a body discriminates between the opposite directions of motion of a pair of counter-revolving tests particles orbiting it along geometrically identical trajectories: it is the so-called gravitomagnetic clock effect. In this paper, we analytically calculate the gravitomagnetic corrections to both the draconitic and to the anomalistic periods of arbitrarily inclined, quasi-circular orbits for a generic orientation of the spin axis of the primary. While the anomalistic period is left unchanged, the draconitic one experiences a generally non-vanishing correction which, to zero order in the eccentricity, gains a minus sign if the velocity of the test particle is reversed. As a result, a gravitomagnetic draconitic clock effect arises since a generally non-zero difference of the draconitic periods of a pair of counter-orbiting test particles arises. Remarkably, it is independent of their initial conditions, with some advantages fr...

  7. Surface integral and finite element hybrid method for three-dimensional analysis of arbitrarily shaped surface cracks

    Energy Technology Data Exchange (ETDEWEB)

    Keat, W.D.; Maybury, D.M. [Clarkson Univ., Potsdam, NY (United States). Dept. of Mechanical and Aeronautical Engineering; Annigeri, B.S. [United Technologies Research Center, East Hartford, CT (United States)

    1996-04-01

    A three-dimensional surface integral and finite element hybrid method has been developed for modeling arbitrarily shaped surface cracks in complex structural components. Accurate stress intensity factors were obtained by decomposing the problem into a surface integral model of the fracture in a domain of infinite extent and a finite element model of the uncracked domain. Boundary conditions were enforced by applying corrective traction to the surfaces of both constituent models. Coupling between the two formulations was minimized by implementing the fundamental solution for a force multipole near a planar free surface. Surface cracks intersecting nonplanar free surfaces were modeled in a piecewise linear fashion by deploying multiple sets of these functions. The effectiveness of this approach was demonstrated for well-documented cases, including a corner crack in a thick plate and a three-dimensional edge crack. The results of these benchmark studies will be used to develop a set of heuristics for assuring suitable finite element mesh densities in the vicinity of the fracture.

  8. Hexile Sieve Analysis of Prime and Composite Integers

    CERN Document Server

    Creft, Roger

    2012-01-01

    Here we demonstrate a sieve for analysing primes and their composites, using equivalence classes based on the modulo 6 return value as applied to the Natural numbers. Five features of this 'Hexile' sieve are reviewed. The first aspect, is that it narrows the search for primes to one-third of the Natural numbers. The second feature is that we can obtain from the equivalence class formulae, a property of its diophantine equations to distinguish between primes and composites resulting from multiplication of these primes. Thirdly we can from these diophantine formulations ascribe a non-random occurence to not only the composites in the two equivalence classes but by default and as a consequence : non-randomness of occurence to the resident primes. Fourthly we develop a theoretical basis for sieving primes. Of final mention is that the diophantine equations allows another route to a prime counting function using combinatorics or numerical analysis.

  9. Semantic Priming from Letter-Searched Primes Occurs for Low- but Not High-Frequency Targets: Automatic Semantic Access May Not Be a Myth

    Science.gov (United States)

    Tse, Chi-Shing; Neely, James H.

    2007-01-01

    Letter-search (LS) within a prime often eliminates semantic priming. In 2 lexical decision experiments, the authors found that priming from LS primes occurred for low-frequency (LF) but not high-frequency (HF) targets whether the target's word frequency was manipulated between or within participants and whether the prime-target pairs were…

  10. Wheat seed enhancement by vitamin and hormonal priming

    International Nuclear Information System (INIS)

    Seed priming has proven beneficial in many important agricultural crops. The present study was conducted to explore the role (if any) of hormonal and vitamin seed priming to improve the germination, seedling emergence, early seedling establishment, electrolyte leakage and nutrients uptake in wheat seedlings. The wheat seeds were soaked for 48 hours in aerated solution of salicylic acid, ascorbic acid, kinetin and GA3 with 20 ppm concentration of each solution, whereas untreated seeds were taken as control. Seed priming with ascorbic acid resulted in maximum final germination and emergence percentage (FGP and FEP), radical and plumule length, root and shoot length, number of secondary roots, root shoot ratio, root dry weight, shoot dry weight and seedling dry weight compared to control (untreated seeds). Minimum mean germination and emergence time (MGT and MET) was recorded in seeds primed with kinetin and GA3. While in case of biochemical attributes, seedling potassium contents were decreased by hormonal seed priming while total soluble sugars were increased by salicylic acid and ascorbic acid seed priming. Hormonal seed priming had non-significant effect on phosphorus seedling contents. Untreated (Control) seeds showed maximum electrical conductivity at 0.5, 1, 2, 6, 12 and 24 h after inbibition than primed seeds against the minimum electrical conductivity that was recorded in seeds primed with salicylic acid and ascorbic acid. In conclusion, the wheat seeds primed with 20 ppm solution of ascorbic acid may be used for wheat seed invigoration. (author)

  11. How Orthography Modulates Morphological Priming: Subliminal Kanji Activation in Japanese

    Science.gov (United States)

    Nakano, Yoko; Ikemoto, Yu; Jacob, Gunnar; Clahsen, Harald

    2016-01-01

    The current study investigates to what extent masked morphological priming is modulated by language-particular properties, specifically by its writing system. We present results from two masked priming experiments investigating the processing of complex Japanese words written in less common (moraic) scripts. In Experiment 1, participants performed lexical decisions on target verbs; these were preceded by primes which were either (i) a past-tense form of the same verb, (ii) a stem-related form with the epenthetic vowel -i, (iii) a semantically-related form, and (iv) a phonologically-related form. Significant priming effects were obtained for prime types (i), (ii), and (iii), but not for (iv). This pattern of results differs from previous findings on languages with alphabetic scripts, which found reliable masked priming effects for morphologically related prime/target pairs of type (i), but not for non-affixal and semantically-related primes of types (ii), and (iii). In Experiment 2, we measured priming effects for prime/target pairs which are neither morphologically, semantically, phonologically nor - as presented in their moraic scripts—orthographically related, but which—in their commonly written form—share the same kanji, which are logograms adopted from Chinese. The results showed a significant priming effect, with faster lexical-decision times for kanji-related prime/target pairs relative to unrelated ones. We conclude that affix-stripping is insufficient to account for masked morphological priming effects across languages, but that language-particular properties (in the case of Japanese, the writing system) affect the processing of (morphologically) complex words. PMID:27065895

  12. How Orthography Modulates Morphological Priming: Subliminal Kanji Activation in Japanese

    Directory of Open Access Journals (Sweden)

    Yoko eNakano

    2016-03-01

    Full Text Available The current study investigates to what extent masked morphological priming is modulated by language-particular properties, specifically by its writing system. We present results from two masked priming experiments investigating the processing of complex Japanese words written in less common (moraic scripts. In Experiment 1, participants performed lexical decisions on target verbs; these were preceded by primes which were either (i a past-tense form of the same verb, (ii a stem-related form with the epenthetic vowel -i, (iii a semantically-related form, and (iv a phonologically-related form. Significant priming effects were obtained for prime types (i, (ii and (iii, but not for (iv. This pattern of results differs from previous findings on languages with alphabetic scripts, which found reliable masked priming effects for morphologically related prime/target pairs of type (i, but not for non-affixal and semantically-related primes of types (ii and (iii. In Experiment 2, we measured priming effects for prime/target pairs which are neither morphologically, semantically, phonologically nor - as presented in their moraic scripts – orthographically related, but which - in their commonly written form - share the same kanji, which are logograms adopted from Chinese. The results showed a significant priming effect, with faster lexical-decision times for kanji-related prime/target pairs relative to unrelated ones. We conclude that affix-stripping is insufficient to account for masked morphological priming effects across languages, but that language-particular properties (in the case of Japanese, the writing system affect the processing of (morphologically complex words.

  13. How Orthography Modulates Morphological Priming: Subliminal Kanji Activation in Japanese.

    Science.gov (United States)

    Nakano, Yoko; Ikemoto, Yu; Jacob, Gunnar; Clahsen, Harald

    2016-01-01

    The current study investigates to what extent masked morphological priming is modulated by language-particular properties, specifically by its writing system. We present results from two masked priming experiments investigating the processing of complex Japanese words written in less common (moraic) scripts. In Experiment 1, participants performed lexical decisions on target verbs; these were preceded by primes which were either (i) a past-tense form of the same verb, (ii) a stem-related form with the epenthetic vowel -i, (iii) a semantically-related form, and (iv) a phonologically-related form. Significant priming effects were obtained for prime types (i), (ii), and (iii), but not for (iv). This pattern of results differs from previous findings on languages with alphabetic scripts, which found reliable masked priming effects for morphologically related prime/target pairs of type (i), but not for non-affixal and semantically-related primes of types (ii), and (iii). In Experiment 2, we measured priming effects for prime/target pairs which are neither morphologically, semantically, phonologically nor - as presented in their moraic scripts-orthographically related, but which-in their commonly written form-share the same kanji, which are logograms adopted from Chinese. The results showed a significant priming effect, with faster lexical-decision times for kanji-related prime/target pairs relative to unrelated ones. We conclude that affix-stripping is insufficient to account for masked morphological priming effects across languages, but that language-particular properties (in the case of Japanese, the writing system) affect the processing of (morphologically) complex words. PMID:27065895

  14. Diagnosis of rinderpest and peste des petits ruminants using PCR

    International Nuclear Information System (INIS)

    Viral RNA was extracted using glass beads. The method is rapid, simple and reproducible. Primer pairs B12/B2 amplified 273 bp nucleotides situated on the terminal N part of the N gene of the RPV. The primes do not amplify the N gene of PPRV, while a P1/P2 primer pair amplifies only a 295 bp fragment of the PPRV N gene and not the N gene of the RPV. The results show the specificity of each of the primer pairs. PCR was simplified to a degree that it can be used in African laboratories. The rinderpest campaign has now reached a stage where this technique is necessary. (author). 4 refs, 8 figs

  15. Comparison of La-PCR and DOP-PCR in Vitro Amplification for Microisolated Chromosome in Rice(Oryza sativa L.)%染色体显微切割两种体外扩增方法的比较

    Institute of Scientific and Technical Information of China (English)

    魏建华; 孙传清; 陈正华; 王象坤

    1999-01-01

    以处于减数分裂中期Ⅰ的水稻三体花粉母细胞为材料,对额外染色体进行了显微分离,通过两种体外扩增方法,即接头引物PCR(linker-adaptor-PCR,LA-PCR)和简并寡聚核苷酸引物PCR(degenerated-oligonucleotide-primed-PCR,DOP-PCR),研究了这两种PCR方法在本研究所采用的微分离染色体体外扩增中的优缺点,认为两种方法都可以有效地体外扩增,但扩增DNA片段大小和对细胞质残留碎片的扩增结果有所不同,LA-PCR对微分离染色体扩增的DNA片段大于DOP-PCR,而对细胞质碎片DNA的扩增,DOP-PCR扩增的DNA片段大于LA-PCR,结论认为LA-PCR优于DOP-PCR.

  16. PCR survey of 50 introns in animals: cross-amplification of homologous EPIC loci in eight non-bilaterian, protostome and deuterostome phyla

    OpenAIRE

    Gérard, Karin; Guilloton, Edith; Arnaud-Haond, Sophie; Aurelle, Didier; Bastrop, Ralf; Chevaldonné, Pierre; Derycke, Sophie; Hanel, Reinhold; Lapègue, Sylvie; Lejeusne, Christopher; Mousset, Sylvain; Ramsak, Andreja; Remerie, Thomas; Viard, Frédérique; Feral, Jean-Pierre

    2013-01-01

    Exon Primed Intron Crossing (EPIC) markers provide molecular tools that are susceptible to be variable within species while remaining amplifiable by PCR using potentially universal primers. In this study we tested the possibility of obtaining PCR products from 50 EPIC markers on 23 species belonging to seven different phyla (Porifera, Cnidaria, Arthropoda, Nematoda, Mollusca, Annelida, Echinodermata) using 70 new primer pairs. A previous study had identified and tested those loci in a dozen s...

  17. A numerical approach for simulating fluid structure interaction of flexible thin shells undergoing arbitrarily large deformations in complex domains

    Science.gov (United States)

    Gilmanov, Anvar; Le, Trung Bao; Sotiropoulos, Fotis

    2015-11-01

    We present a new numerical methodology for simulating fluid-structure interaction (FSI) problems involving thin flexible bodies in an incompressible fluid. The FSI algorithm uses the Dirichlet-Neumann partitioning technique. The curvilinear immersed boundary method (CURVIB) is coupled with a rotation-free finite element (FE) model for thin shells enabling the efficient simulation of FSI problems with arbitrarily large deformation. Turbulent flow problems are handled using large-eddy simulation with the dynamic Smagorinsky model in conjunction with a wall model to reconstruct boundary conditions near immersed boundaries. The CURVIB and FE solvers are coupled together on the flexible solid-fluid interfaces where the structural nodal positions, displacements, velocities and loads are calculated and exchanged between the two solvers. Loose and strong coupling FSI schemes are employed enhanced by the Aitken acceleration technique to ensure robust coupling and fast convergence especially for low mass ratio problems. The coupled CURVIB-FE-FSI method is validated by applying it to simulate two FSI problems involving thin flexible structures: 1) vortex-induced vibrations of a cantilever mounted in the wake of a square cylinder at different mass ratios and at low Reynolds number; and 2) the more challenging high Reynolds number problem involving the oscillation of an inverted elastic flag. For both cases the computed results are in excellent agreement with previous numerical simulations and/or experiential measurements. Grid convergence tests/studies are carried out for both the cantilever and inverted flag problems, which show that the CURVIB-FE-FSI method provides their convergence. Finally, the capability of the new methodology in simulations of complex cardiovascular flows is demonstrated by applying it to simulate the FSI of a tri-leaflet, prosthetic heart valve in an anatomic aorta and under physiologic pulsatile conditions.

  18. An approximate semi-analytical method for prediction of interlaminar shear stresses in an arbitrarily laminated thick plate

    Science.gov (United States)

    Chaudhuri, Reaz A.; Seide, Paul

    1987-01-01

    An approximate semianalytical method for determination of interlaminar shear stress distribution through the thickness of an arbitrarily laminated thick plate has been presented. The method is based on the assumptions of transverse inextensibility and layerwise constant shear angle theory (LCST) and utilizes an assumed quadratic displacement potential energy based finite element method (FEM). Centroid of the triangular surface has been proved from a rigorous mathematical point of view (Aubin-Nitsche theory), to be the point of exceptional accuracy for the interlaminar shear stresses. Numerical results indicate close agreement with the available three-dimensional elasticity theory solutions. A comparison between the present theory and that due to an assumed stress hybrid FEM suggest that the (normal) traction-free-edge condition is not satisfied in the latter approach. Furthermore, the present paper is the first to present the results for interlaminar shear stresses in a two-layer thick square plate of balanced unsymmetric angle-ply construction. A comparison with the recently proposed Equilibrium Method (EM) indicates the superiority of the present method, because the latter assures faster convergence as well as simultaneous vanishing of the transverse shear stresses on both of the exposed surfaces of the laminate. Superiority of the present method over the EM, in the case of a symmetric laminate, is limited to faster convergence alone. It has also been demonstrated that the combination of the present method and the reduced (quadratic order) numerical integration scheme yields convergence of the interlaminar shear stresses almost as rapidly as that of the nodal displacements, in the case of a thin plate.

  19. Numerical Models for Exact Description of in-situ Digital In-Line Holography Experiments with Irregularly-Shaped Arbitrarily-Located Particles

    Directory of Open Access Journals (Sweden)

    Marc Brunel

    2015-04-01

    Full Text Available We present the development of a numerical simulator for digital in-line holography applications. In-line holograms of arbitrarily shaped and arbitrarily located objects are calculated using generalized Huygens-Fresnel integrals. The objects are 2D opaque or phase objects. The optical set-up is described by its optical transfer matrix. A wide variety of optical systems, involving windows, spherical or cylindrical lenses, can thus be taken into account. It makes the simulator applicable for design and description of in situ experiments. We discuss future applications of this simulator for detection of nanoparticles in droplets, or calibration of airborne instruments that detect and measure ice crystals in the atmosphere.

  20. Online exercise for the design and simulation of PCR and PCR-RFLP experiments

    OpenAIRE

    San Millán Gutiérrez, Rosario María; Martínez Ballesteros, Ilargi; Rementeria Ruiz, Aitor Domingo; Garaizar Candina, Javier; Bikandi Bikandi, Joseba

    2013-01-01

    [EN] Background: Polymerase Chain Reaction (PCR) and Restriction Fragment Length Polymorphism of PCR products (PCR-RFLP) are extensively used molecular biology techniques. An exercise for the design and simulation of PCR and PCR-RFLP experiments will be a useful educational tool. Findings: An online PCR and PCR-RFLP exercise has been create that requires users to find the target genes,compare them, design primers, search for restriction endonucleases, and finally to simulate the experiment...

  1. Effects induced on the transverse-spatial-impulse response of an inhomogeneous photoreceptor with a nonsymmetric refractive index profile and arbitrarily located origin

    International Nuclear Information System (INIS)

    In a few earlier communications, spatial-transverse-impulse response (STIR) associated with the initial field transversely distributed across the entrance pupil of an inhomogeneous optical wave guide (photo-receptor) has been investigated. In the present work, effects of indetermination in the location of the origin on an arbitrarily defined refractive index profile, representing the degree of inhomogenity at the aperture pupil of a single receptor, have been studied. Some consequences related to a few possible technical applications have been discussed

  2. Effects induced on the transverse-spatial-impulse response of an inhomogeneous photoreceptor with a nonsymmetric refractive index profile and arbitrarily located origin

    Energy Technology Data Exchange (ETDEWEB)

    Calvo, M.L.; Mondal, P.K.

    1987-03-01

    In a few earlier communications, spatial-transverse-impulse response (STIR) associated with the initial field transversely distributed across the entrance pupil of an inhomogeneous optical wave guide (photoreceptor) has been investigated. In the present work, effects of indetermination in the location of the origin on an arbitrarily defined refractive index profile, representing the degree of inhomogeneity at the aperture pupil of a single receptor, have been studied. Some consequences related to a few possible technical applications have been discussed.

  3. Arbitrarily loss-tolerant Einstein-Podolsky-Rosen steering allowing a demonstration over 1 km of optical fiber with no detection loophole

    OpenAIRE

    Bennet, A. J.; Evans, D. A.; Saunders, D. J.; Branciard, C.; Cavalcanti, E. G.; Wiseman, H. M.; Pryde, G.J.

    2011-01-01

    Demonstrating nonclassical effects over longer and longer distances is essential for both quantum technology and fundamental science. The main challenge is loss of photons during propagation, because considering only those cases where photons are detected opens a "detection loophole" in security whenever parties or devices are untrusted. Einstein-Podolsky-Rosen (EPR) steering is equivalent to an entanglement-verification task in which one party (device) is untrusted. We derive arbitrarily los...

  4. Stationary Light Waves in Anizotropy and Nonolinear Plane Media, whose Dielectric Tensor's Principal Values Arbitrarily Depend upon Intensity Case of Scattering

    CERN Document Server

    Ochirbat, G

    2000-01-01

    A plane medium, whose dielectric tensor's principal values arbitrarily depend upon intensity, is considered. The problems of the TM and TE waves, within the problem of light scattering, are reduced to quadrature. A question of integrability of the full system of Maxwell equations is discussed. A closed equation has been obtained for an auxiliary variable for a nonlinearity of Kerr type. A scheme for integrating the full system of Maxwell equations by solving the equation over the auxiliary variable is suggested.

  5. The Current Status of Prime Focus Instrument of Subaru Prime Focus Spectrograph

    CERN Document Server

    Wang, Shiang-Yu; Huang, Pin-Jie; Chen, Hsin-Yo; Kimura, Masahiko; Chou, Richard C Y; Chang, Yin-Chang; Hu, Yen-Sang; Ling, Hung-Hsu; Morantz, Chaz N; Reiley, Dan J; Mao, Peter; Braun, David F; Wen, Chih-Yi; Yan, Chi-Hung; Karr, Jennifer; Gunn, James E; Murray, Graham; Tamura, Naoyuki; Takato, Naruhisa; Shimono, Atsushi; Ferreira, Decio; Santosh, Leandro Henriqu dos; Oliveira, Ligia Souza; de Oliveira, Antonio Cesar; Marrara, Lucas Souza

    2016-01-01

    The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of the 8.2m Subaru telescope. PFS will cover 1.3 degree diameter field with 2394 fibers to complement the imaging capability of Hyper SuprimeCam (HSC). The prime focus unit of PFS called Prime Focus Instrument (PFI) provides the interface with the top structure of Subaru telescope and also accommodates the optical bench in which Cobra fiber positioners are located. In addition, the acquisition and guiding cameras (AGCs), the optical fiber positioner system, the cable wrapper, the fiducial fibers, illuminator, and viewer, the field element, and the telemetry system are located inside the PFI. The mechanical structure of the PFI was designed with special care such that its deflections sufficiently match those of the HSC's Wide Field Corrector (WFC) so the fibers will stay on targets over the course of the observations within the required accuracy. In this report, the latest status of PFI develop...

  6. Does pizza prime coin? Perceptual priming in lexical decision and pronunciation.

    NARCIS (Netherlands)

    D. Pecher; R. Zeelenberg; J.G.W. Raaijmakers

    1998-01-01

    In 6 experiments the authors investigated priming for perceptually related word pairs (i.e., words that refer to objects with the same shape such as pizza-coin), trying to replicate earlier findings by R. Schreuder et al (see record 1985-06198-001) while avoiding some of the methodological problems

  7. Does pizza prime coin? Perceptual priming in lexical decision and pronunciation.

    NARCIS (Netherlands)

    D. Pecher (Diane); R. Zeelenberg (René); J.G.W. Raaijmakers (Jeroen)

    1998-01-01

    textabstractIn 6 experiments the authors investigated priming for perceptually related word pairs (i.e., words that refer to objects with the same shape such as pizza-coin), trying to replicate earlier findings by R. Schreuder et al (see record 1985-06198-001) while avoiding some of the methodologic

  8. Phonology in the Lexical Processing of Chinese: Priming Tone Neighbors

    Institute of Scientific and Technical Information of China (English)

    Zhou Xiaolin

    2000-01-01

    Using both visual-visual and auditory-visual priming lexical decision tasks, this study investigated phonological processing in reading logographic Chinese. Compound words sharing segmental templates but differing in lexical tones were used as primes and targets while their relative frequency was manipulated. It was found that tone neighbours did not prime each other significantly and the SOA of 100 msec in visual-visual priming. When the SOA was increased to 357 msec, or when primes were presented auditorily, the processing of target words was significantly delayed by their tone neighbours. Larger inhibitory effects were observed for low frequency targets with high frequency primes. It was argued that although phonological information is automatically activated and this activation affects access to semantics in reading Chinese,phonological mediation is not the only or the main ~urce of constraints on semantic activation.

  9. Word-identification priming for ignored and attended words

    Science.gov (United States)

    Stone, M.; Ladd, S. L.; Vaidya, C. J.; Gabrieli, J. D.

    1998-01-01

    Three experiments examined contributions of study phase awareness of word identity to subsequent word-identification priming by manipulating visual attention to words at study. In Experiment 1, word-identification priming was reduced for ignored relative to attended words, even though ignored words were identified sufficiently to produce negative priming in the study phase. Word-identification priming was also reduced after color naming relative to emotional valence rating (Experiment 2) or word reading (Experiment 3), even though an effect of emotional valence upon color naming (Experiment 2) indicated that words were identified at study. Thus, word-identification priming was reduced even when word identification occurred at study. Word-identification priming may depend on awareness of word identity at the time of study.

  10. Word-identification priming for ignored and attended words.

    Science.gov (United States)

    Stone, M; Ladd, S L; Vaidya, C J; Gabrieli, J D

    1998-06-01

    Three experiments examined contributions of study phase awareness of word identity to subsequent word-identification priming by manipulating visual attention to words at study. In Experiment 1, word-identification priming was reduced for ignored relative to attended words, even though ignored words were identified sufficiently to produce negative priming in the study phase. Word-identification priming was also reduced after color naming relative to emotional valence rating (Experiment 2) or word reading (Experiment 3), even though an effect of emotional valence upon color naming (Experiment 2) indicated that words were identified at study. Thus, word-identification priming was reduced even when word identification occurred at study. Word-identification priming may depend on awareness of word identity at the time of study. PMID:9690028

  11. Diuretics prime plant immunity in Arabidopsis thaliana.

    Directory of Open Access Journals (Sweden)

    Yoshiteru Noutoshi

    Full Text Available Plant activators are agrochemicals that activate the plant immune system, thereby enhancing disease resistance. Due to their prophylactic and durable effects on a wide spectrum of diseases, plant activators can provide synergistic crop protection when used in combination with traditional pest controls. Although plant activators have achieved great success in wet-rice farming practices in Asia, their use is still limited. To isolate novel plant activators applicable to other crops, we screened a chemical library using a method that can selectively identify immune-priming compounds. Here, we report the isolation and characterization of three diuretics, bumetanide, bendroflumethiazide and clopamide, as immune-priming compounds. These drugs upregulate the immunity-related cell death of Arabidopsis suspension-cultured cells induced with an avirulent strain of Pseudomonas syringae pv. tomato in a concentration-dependent manner. The application of these compounds to Arabidopsis plants confers disease resistance to not only the avirulent but also a virulent strain of the pathogen. Unlike salicylic acid, an endogenous phytohormone that governs disease resistance in response to biotrophic pathogens, the three diuretic compounds analyzed here do not induce PR1 or inhibit plant growth, showing potential as lead compounds in a practical application.

  12. Influence of Individual and Group Priming on Medical Students

    OpenAIRE

    McGeown, Helen Rosemary

    2009-01-01

    This study investigated the impact of information on level of prototypicality of the ingroup ‘medical students’, comparing self-esteem effects for those primed as individuals with self-esteem effects for those primed as group members. Indication of prototypicality was given by false feedback on purported individual levels of empathy, an important group norm for medical students. As well as priming type having interactive effects with prototypicality information, it was hypothesized that initi...

  13. Prime polynomial values of linear functions in short intervals

    OpenAIRE

    Bank, Efrat; Bary-Soroker, Lior

    2014-01-01

    In this paper we establish a function field analogue of a conjecture in number theory which is a combination of several famous conjectures, including the Hardy-Littlewood prime tuple conjecture, conjectures on the number of primes in arithmetic progressions and in short intervals, and the Goldbach conjecture. We prove an asymptotic formula for the number of simultaneous prime values of $n$ linear functions, in the limit of a large finite field.

  14. Basel III E: Synthetic Financing by Prime Brokers

    OpenAIRE

    Christian M. McNamara; Andrew Metrick

    2014-01-01

    Hedge funds rely on “prime brokerage” units within banks to provide leverage. With the enhanced capital requirements and new liquidity standards introduced by Basel III driving up the cost to banks of engaging in such financing, prime brokers have begun to offer an alternative means of providing hedge fund clients with leveraged exposure to securities.  Known as synthetic financing, this alternative requires the prime broker enter into derivatives contracts with the clients.  Under the Basel ...

  15. On sums involving the number of distinct prime factors function

    OpenAIRE

    Wakhare, Tanay

    2016-01-01

    The main object of this paper is to find closed form expressions for finite and infinite sums that are weighted by $\\omega(n)$, where $\\omega(n)$ is the number of distinct prime factors of $n$. We then derive general convergence criteria for these series. The approach of this paper is use polynomial theorems to prove several factorization identities for arbitrary complex numbers, then apply these identities with arbitrary primes and values of multiplicative functions evaluated at primes. This...

  16. The $n$th+1 Prime Number Limit Formulas

    OpenAIRE

    Kawalec, Artur

    2016-01-01

    A new derivation of Golomb's limit formula for generating the $n$th$+1$ prime number is presented. The limit formula is derived by extracting $p_{n+1}$ from Euler's prime product representation of the Riemann zeta function $\\zeta(s)$ in the limit as $s$ approaches infinity. Also, new variations of these limit formulas are explored, such as the logarithm and a half-prime formulas for the $p_{n+1}$.

  17. Identity negative priming: a phenomenon of perception, recognition or selection?

    Directory of Open Access Journals (Sweden)

    Hecke Schrobsdorff

    Full Text Available The present study addresses the problem whether negative priming (NP is due to information processing in perception, recognition or selection. We argue that most NP studies confound priming and perceptual similarity of prime-probe episodes and implement a color-switch paradigm in order to resolve the issue. In a series of three identity negative priming experiments with verbal naming response, we determined when NP and positive priming (PP occur during a trial. The first experiment assessed the impact of target color on priming effects. It consisted of two blocks, each with a different fixed target color. With respect to target color no differential priming effects were found. In Experiment 2 the target color was indicated by a cue for each trial. Here we resolved the confounding of perceptual similarity and priming condition. In trials with coinciding colors for prime and probe, we found priming effects similar to Experiment 1. However, trials with a target color switch showed such effects only in trials with role-reversal (distractor-to-target or target-to-distractor, whereas the positive priming (PP effect in the target-repetition trials disappeared. Finally, Experiment 3 split trial processing into two phases by presenting the trial-wise color cue only after the stimulus objects had been recognized. We found recognition in every priming condition to be faster than in control trials. We were hence led to the conclusion that PP is strongly affected by perception, in contrast to NP which emerges during selection, i.e., the two effects cannot be explained by a single mechanism.

  18. Clusters of internally primed transcripts reveal novel long noncoding RNAs.

    Directory of Open Access Journals (Sweden)

    2006-04-01

    Full Text Available Non-protein-coding RNAs (ncRNAs are increasingly being recognized as having important regulatory roles. Although much recent attention has focused on tiny 22- to 25-nucleotide microRNAs, several functional ncRNAs are orders of magnitude larger in size. Examples of such macro ncRNAs include Xist and Air, which in mouse are 18 and 108 kilobases (Kb, respectively. We surveyed the 102,801 FANTOM3 mouse cDNA clones and found that Air and Xist were present not as single, full-length transcripts but as a cluster of multiple, shorter cDNAs, which were unspliced, had little coding potential, and were most likely primed from internal adenine-rich regions within longer parental transcripts. We therefore conducted a genome-wide search for regional clusters of such cDNAs to find novel macro ncRNA candidates. Sixty-six regions were identified, each of which mapped outside known protein-coding loci and which had a mean length of 92 Kb. We detected several known long ncRNAs within these regions, supporting the basic rationale of our approach. In silico analysis showed that many regions had evidence of imprinting and/or antisense transcription. These regions were significantly associated with microRNAs and transcripts from the central nervous system. We selected eight novel regions for experimental validation by northern blot and RT-PCR and found that the majority represent previously unrecognized noncoding transcripts that are at least 10 Kb in size and predominantly localized in the nucleus. Taken together, the data not only identify multiple new ncRNAs but also suggest the existence of many more macro ncRNAs like Xist and Air.

  19. Galleria mellonella larvae are capable of sensing the extent of priming agent and mounting proportionatal cellular and humoral immune responses.

    Science.gov (United States)

    Wu, Gongqing; Xu, Li; Yi, Yunhong

    2016-06-01

    Larvae of Galleria mellonella are useful models for studying the innate immunity of invertebrates or for evaluating the virulence of microbial pathogens. In this work, we demonstrated that prior exposure of G. mellonella larvae to high doses (1×10(4), 1×10(5) or 1×10(6) cells/larva) of heat-killed Photorhabdus luminescens TT01 increases the resistance of larvae to a lethal dose (50 cells/larva) of viable P. luminescens TT01 infection administered 48h later. We also found that the changes in immune protection level were highly correlated to the changes in levels of cellular and humoral immune parameters when priming the larvae with different doses of heat-killed P. luminescens TT01. Priming the larvae with high doses of heat-killed P. luminescens TT01 resulted in significant increases in the hemocytes activities of phagocytosis and encapsulation. High doses of heat-killed P. luminescens TT01 also induced an increase in total hemocyte count and a reduction in bacterial density within the larval hemocoel. Quantitative real-time PCR analysis showed that genes coding for cecropin and gallerimycin and galiomycin increased in expression after priming G. mellonella with heat-killed P. luminescens TT01. All the immune parameters changed in a dose-dependent manner. These results indicate that the insect immune system is capable of sensing the extent of priming agent and mounting a proportionate immune response. PMID:27107784

  20. The negative priming effect in cognitive conflict processing.

    Science.gov (United States)

    Pan, Fada; Shi, Liang; Lu, Qingyun; Wu, Xiaogang; Xue, Song; Li, Qiwei

    2016-08-15

    The present study used event-related potentials (ERPs) to investigate the specific physiological mechanisms underlying the negative nature of cognitive conflict and its influence on affective word evaluations. The present study used an affective priming paradigm where Stroop stimuli were presented for 200ms after which affective target words had to be evaluated as being positive or negative. Behavioral results showed that reaction times (RTs) were shorter for positive targets following congruent primes relative to incongruent primes, and for negative targets following incongruent primes relative to congruent primes. The ERP results showed that the N2 amplitude (200-300ms) for incongruent stimuli was significantly larger than for congruent stimuli in the Stroop task, which indicated a significant conflict effect. Moreover, the N400 amplitude (300-500ms) was smaller for negative words following incongruent primes relative to congruent primes, and for positive words following congruent primes relative to incongruent primes. The results demonstrated that cognitive conflict modulated both behavioral and electrophysiological correlates of subsequent emotional processing, consistent with its hypothesized registration as an aversive signal. PMID:27268038

  1. Pros of priming in the diagnosis of growth hormone deficiency.

    Science.gov (United States)

    Gonc, E Nazli; Ozon, Alev; Alikasifoglu, Ayfer; Kandemir, Nurgun

    2011-01-01

    Priming with sex steroids in stimulation tests for the diagnosis of GHD is still under debate. Most of the data on utility of priming during GH stimulation so far seem to support its use in the diagnosis of GHD in childhood. There is a propensity to treat growth retarded children who test subnormally to stimulation tests with GH. However, some studies analyzing the final height or height gain during GH treatment in such children failed to show any improvement in height. This paper summarizes previous studies on priming to analyze the utility of priming as a valid method to better the diagnostic capacity of the test. PMID:21528807

  2. The set of prime numbers: Multiscale analysis and numeric accelerators

    International Nuclear Information System (INIS)

    In this work, we show that the prime numbers follow a multiscale distribution. Indeed they can be classified thanks to tree structures, which are expressed in terms of two maximal subsets of N and using multilayer selection rules, acting on these sets of prime candidates. Consequently, the prime numbers follow a specific deterministic rules. Indeed, a numeric accelerator for generating primes can be realized in terms of the above mentioned specific rules. From the comparison with the Fibonacci numbers a beautiful harmony comes in terms of the Golden Mean which is relevant to high energy physics and E-Infinity theory too.

  3. The Curious Case of Behavioral Backlash: Why Brands Produce Priming Effects and Slogans Produce Reverse Priming Effects

    OpenAIRE

    Juliano Laran; Amy N. Dalton; Andrade, Eduardo B.

    2011-01-01

    Five experiments demonstrate that brands cause priming effects (i.e., behavioral effects consistent with those implied by the brand), whereas slogans cause reverse priming effects (i.e., behavioral effects opposite to those implied by the slogan). For instance, exposure to the retailer brand name "Walmart," typically associated with saving money, reduces subsequent spending, whereas exposure to the Walmart slogan, "Save money. Live better," increases it. Slogans cause reverse priming effects ...

  4. Spin reversal and orbital torques on a viscous fluid Rayleigh sphere located arbitrarily in acoustical Bessel vortex (spiraling) beams.

    Science.gov (United States)

    Mitri, F G

    2016-12-01

    The goal of this work is to demonstrate the emergence of a spin torque singularity (i.e. zero spin torque) and a spin rotation reversal of a small Rayleigh lipid/fat viscous fluid sphere located arbitrarily in space in the field of an acoustical Bessel vortex beam. This counter-intuitive property of negative spin torque generation suggests a direction of spin rotation in opposite handedness of the angular momentum carried by the incident beam. Such effects may open new capabilities in methods of quantitative characterization to determine physical properties such as viscosity, viscoelasticity, compressibility, stiffness, etc., and other techniques for the rotation and positioning using acoustical tractor beams and tweezers, invisibility cloaks, and acoustically-engineered composite metamaterials to name a few examples. Based on the descriptions for the velocity potential of the incident beam and the scattering coefficients of the sphere in the long-wavelength approximation limit, simplified expressions for the spin and orbital radiation torque components are derived. For beams with (positive or negative) unit topological charge (m=±1), the axial spin torque component for a Rayleigh absorptive sphere is maximal at the center of the beam, while it vanishes for |m|>1 therein. Moreover, the longitudinal orbital torque component, causing the sphere to rotate around the center of the beam is evaluated based on the mathematical decomposition using the gradient, scattering and absorption transverse radiation force vector components. It is shown that there is no contribution of the gradient transverse force to the orbital torque, which is only caused by the scattering and absorption transverse force components. Though the incident acoustical vortex beam carrying angular momentum causes the sphere to rotate in the same orbital direction of the beam handedness, it induces a spin torque singularity (i.e. zero spin torque) and subsequent sign reversal. This phenomenon of

  5. Electromagnetic thrusters for spacecraft prime propulsion

    Science.gov (United States)

    Rudolph, L. K.; King, D. Q.

    1984-01-01

    The benefits of electromagnetic propulsion systems for the next generation of US spacecraft are discussed. Attention is given to magnetoplasmadynamic (MPD) and arc jet thrusters, which form a subset of a larger group of electromagnetic propulsion systems including pulsed plasma thrusters, Hall accelerators, and electromagnetic launchers. Mission/system study results acquired over the last twenty years suggest that for future prime propulsion applications high-power self-field MPD thrusters and low-power arc jets have the greatest potential of all electromagnetic thruster systems. Some of the benefits they are expected to provide include major reductions in required launch mass compared to chemical propulsion systems (particularly in geostationary orbit transfer) and lower life-cycle costs (almost 50 percent less). Detailed schematic drawings are provided which describe some possible configurations for the various systems.

  6. Power Cocentralizing Generalized Derivations on Prime Rings

    Indian Academy of Sciences (India)

    Vincenzo De Filippis

    2010-06-01

    Let be a prime ring, the Utumi quotient ring of $R,C=Z(U)$ the extended centroid of , a non-central Lie ideal of , and non-zero generalized derivations of . Suppose that there exists an integer $n≥ 1$ such that $(H(u)u-uG(u))^n=0$, for all $u\\in L$, then one of the following holds: (1) there exists $c\\in U$ such that $H(x)=xc,G(x)=cx;(2)R$ satisfies the standard identity $s_4$ and char ()=2; (3) satisfies $s4$ and there exist $a, b, c\\in U$, such that $H(x)=ax+xc,G(x)=cx+xb$ and $(a-b)^n=0$.

  7. Formal Language Decomposition into Semantic Primes

    Directory of Open Access Journals (Sweden)

    Johannes FÄHNDRICH

    2014-10-01

    Full Text Available This paper describes an algorithm for semantic decomposition. For that we surveys languages used to enrich contextual information with semantic descriptions. Such descriptions can be e.g. applied to enable reasoning when collecting vast amounts of information. In particular, we focus on the elements of the languages that make up their semantic. To do so, we compare the expressiveness of the well-known languages OWL, PDDL and MOF with a theory from linguistic called the Natural Semantic Metalanguage. We then analyze how the semantic of the language is build up and describe how semantic decomposition based on the semantic primes can be used for a so called mental lexicon. This mental lexicon can be used to reason upon semantic service description in the research domain of service match making.

  8. Comparison of Droplet Digital PCR to Real-Time PCR for Quantitative Detection of Cytomegalovirus

    OpenAIRE

    Hayden, R. T.; Gu, Z; Ingersoll, J; Abdul-Ali, D.; Shi, L; Pounds, S.; Caliendo, A. M.

    2013-01-01

    Quantitative real-time PCR (QRT-PCR) has been widely implemented for clinical viral load testing, but a lack of standardization and relatively poor precision have hindered its usefulness. Digital PCR offers highly precise, direct quantification without requiring a calibration curve. Performance characteristics of real-time PCR were compared to those of droplet digital PCR (ddPCR) for cytomegalovirus (CMV) load testing. Tenfold serial dilutions of the World Health Organization (WHO) and the Na...

  9. SOA Does Not Reveal the Absolute Time Course of Cognitive Processing in Fast Priming Experiments

    Science.gov (United States)

    Tzur, Boaz; Frost, Ram

    2007-01-01

    Applying Bloch's law to visual word recognition research, both exposure duration of the prime and its luminance determine the prime's overall energy, and consequently determine the size of the priming effect. Nevertheless, experimenters using fast-priming paradigms traditionally focus only on the SOA between prime and target to reflect the…

  10. A{prime} (A-PRIMED): A case study in teamwork

    Energy Technology Data Exchange (ETDEWEB)

    Ashby, R.; Forsythe, C.; Benavides, G.; Diegert, K.; Jones, R.; Longcope, D.; Parratt, S.

    1995-07-01

    June 1993, the A-PRIMED project (Agile Product Realization of electrMEchanical Devices) was formed with a concurrent engineering team of product designers, analysts, CNC machinists, robotic assembly scientists, electronics communications developers, statisticians and human factors scientists at Sandia National Laboratories, to develop and demonstrate a process for a much faster design-to-production cycle for precision electromechanical devices. The team had to develop the culture and infrastructure to support communications between remotely located members, as well as demonstrate a shortened cycle time made possible by developing new technologies. These new technologies were then adopted by the team and introduced to their work partners to support new work processes. By March 1995, the A-PRIMED team has used the new technologies and work processes to design and build qualified new products in only 24 days.

  11. Recent Experience Affects the Strength of Structural Priming

    Science.gov (United States)

    Kaschak, Michael P.; Loney, Renrick A.; Borreggine, Kristin L.

    2006-01-01

    In two experiments, we explore how recent experience with particular syntactic constructions affects the strength of the structural priming observed for those constructions. The results suggest that (1) the strength of structural priming observed for double object and prepositional object constructions is affected by the relative frequency with…

  12. Decomposition of Repetition Priming Processes in Word Translation

    Science.gov (United States)

    Francis, Wendy S.; Duran, Gabriela; Augustini, Beatriz K.; Luevano, Genoveva; Arzate, Jose C.; Saenz, Silvia P.

    2011-01-01

    Translation in fluent bilinguals requires comprehension of a stimulus word and subsequent production, or retrieval and articulation, of the response word. Four repetition-priming experiments with Spanish-English bilinguals (N = 274) decomposed these processes using selective facilitation to evaluate their unique priming contributions and factorial…

  13. Dealing with prime numbers I.: On the Goldbach conjecture

    OpenAIRE

    Martelli, Fausto

    2013-01-01

    In this paper we present some observations about the well-known Goldbach conjecture. In particular we list and interpret some numerical results which allow us to formulate a relation between prime numbers and even integers. We can also determine very thin and low diverging ranges in which the probability of finding a prime is one.

  14. Exploring Visuomotor Priming Following Biological and Non-Biological Stimuli

    Science.gov (United States)

    Gowen, E.; Bradshaw, C.; Galpin, A.; Lawrence, A.; Poliakoff, E.

    2010-01-01

    Observation of human actions influences the observer's own motor system, termed visuomotor priming, and is believed to be caused by automatic activation of mirror neurons. Evidence suggests that priming effects are larger for biological (human) as opposed to non-biological (object) stimuli and enhanced when viewing stimuli in mirror compared to…

  15. Towers of Function Fields over Non-prime Finite Fields

    DEFF Research Database (Denmark)

    Bassa, Alp; Beelen, Peter; Garcia, Arnaldo;

    2015-01-01

    Over all non-prime finite fields, we construct some recursive towers of function fields with many rational places. Thus we obtain a substantial improvement on all known lower bounds for Ihara’s quantity A(ℓ), for ℓ = pn with p prime and n > 3 odd. We relate the explicit equations to Drinfeld...

  16. INTERSECTION OF PRIME SUBMODULES AND DIMENSION OF MODULES

    Institute of Scientific and Technical Information of China (English)

    A. Azizi

    2005-01-01

    The aim of this paper is to study the conditions by which a P-prime submodule can be expressed as a finite intersection or union of P-prime submodules. Also corresponding to dimension and rank of modules, some equivalent conditions for a ring to be a Dedekind domain are given.

  17. On the Prime Ideals of C[0,1

    Indian Academy of Sciences (India)

    2016-05-01

    It is well known that the set C[0, 1] of real-valuedcontinuous functions on the closed interval [0, 1]has a natural ring structure. Its maximal idealsare known to be points. Here we show thatalthough there exist prime ideals which are notmaximal, the zero set is again a singleton. In particular,each prime ideal is contained in a uniquemaximal ideal.

  18. Fall Colors, 2001-02: Prime Time Diversity Report.

    Science.gov (United States)

    Parker, McCrae A.; Miller, Patti; Espejo, Eileen; Grossman-Swenson, Sarah

    Television is an integral part of American culture, and has the ability to play a major role in shaping belief systems, particularly for the youngest and most impressionable viewers. This study is the third annual study of diversity of characters in prime time television programming. The study examined the first two episodes of each prime time…

  19. New bounds for the prime counting function \\pi(x)

    OpenAIRE

    Axler, Christian

    2014-01-01

    In this paper we establish a number of new estimates concerning the prime counting function \\pi(x), which improve the estimates proved in the literature. As an application, we deduce a new result concerning the existence of prime numbers in small intervals.

  20. Odd Perfect Numbers Have At Least Nine Distinct Prime Factors

    OpenAIRE

    Nielsen, Pace P.

    2006-01-01

    An odd perfect number, N, is shown to have at least nine distinct prime factors. If 3 does not divide N, then N must have at least twelve distinct prime divisors. The proof ultimately avoids previous computational results for odd perfect numbers.

  1. A Natural Partial Order on The Prime Numbers

    OpenAIRE

    Ionescu, Lucian M.

    2014-01-01

    A natural partial order on the set of prime numbers was derived by the author from the internal symmetries of the primary finite fields, independently of Ford a.a., who investigated Pratt trees for primality tests. It leads to a correspondence with the Hopf algebra of rooted trees, and as an application, to an alternative approach to the Prime Number Theorem.

  2. Prime Number Identification in Idiots Savants: Can They Calculate Them?

    Science.gov (United States)

    Welling, Hans

    1994-01-01

    The ability of some individuals with mental retardation to identify prime numbers despite their lack of necessary arithmetical skills is discussed. The article suggests that a distinction between prime and nonprime numbers can be made by utilizing the tendency of visual perception to be symmetrically organized. (Author/DB)

  3. A first ever precise predictive prime number spiral placement

    Directory of Open Access Journals (Sweden)

    Vinoo Cameron

    2013-06-01

    Full Text Available This mathematical rhythm of the reality of prime numbers is foreign to current mathematics because prime numbers and generally all numbers function as placement in empty space, rather than counting beans. This final paper on the -1 mathematics, clearly demonstrates the method and the rationality of the random variability of prime numbers, and confirms the central-spiral mathematical arrangement of prime numbers around a half-line. This is purely a numbers phenomenon as arranged in a spiral cone. If current mathematics cannot decipher the very simple entrée presented here in open numbers, it is too bad, for the author is just beginning to grasp at it.The 8 referenced published manuscripts that precede this manuscript specifically qualify the segregated infinite series of prime numbers with the half-line value 18(6*3,-6, and other half-line values starting at 12, as infinitely calculable. The solution and the entered proof of a precise symmetrical Prime number placement has come after much pain and ridicule (what is not understood is ridiculed by the meager in knowledge .The latter is the focus of the mathematical entrée here, as much sophistication needs to be done, but that will come at the authors discretion. Current mathematics is not set up to solve this final solution to prime numbers; it may observe it, as it observes its large pumpkin Prime numbers.

  4. The set of prime numbers: Multifractals and multiscale analysis

    International Nuclear Information System (INIS)

    In this work we show that the prime numbers can be seen as the sides or angles of a multifractal polygon based on a hexagon. This also means that primes follow a multiscale distribution and can be generated in a beautiful deterministic fashion.

  5. Auditory Repetition Priming Is Impaired in Pure Alexic Patients

    Science.gov (United States)

    Swick, Diane; Miller, Kimberly M.; Larsen, Jary

    2004-01-01

    Alexia without agraphia, or ''pure'' alexia, is an acquired impairment in reading that leaves writing skills intact. Repetition priming for visually presented words is diminished in pure alexia. However, it is not possible to verify whether this priming deficit is modality-specific or modality independent because reading abilities are compromised.…

  6. A Few Equivalences of Wall-Sun-Sun Prime Conjecture

    OpenAIRE

    Saha, Arpan; Karthik, C S

    2011-01-01

    In this paper, we prove a few lemmas concerning Fibonacci numbers modulo primes and provide a few statements that are equivalent to Wall-Sun-Sun Prime Conjecture. Further, we investigate the conjecture through heuristic arguments and propose a few additional conjectures for future research.

  7. Structural Priming as Implicit Learning: Cumulative Priming Effects and Individual Differences

    OpenAIRE

    Kaschak, Michael P.; Kutta, Timothy J.; Jones, John L.

    2011-01-01

    We explored the claim that structural priming is a case of implicit learning within the language production system. The experiment began with a baseline phase, in which we assessed participants’ rates of production for double object and prepositional object constructions. Then participants were biased toward the production of either the double object or prepositional object construction. Finally, we again assessed participants’ rates of production for the target constructions. Consistent with...

  8. Structure and prime decomposition law and relative extensions of abelian fields with prime power degree

    Institute of Scientific and Technical Information of China (English)

    张贤科

    1999-01-01

    Let L be an abelian extension of the rationals Q whose Galois group Gal(L) is an abelian (q-group q is any prime number). The explicit law of prime decomposition in L for any prime number p, the inertia group, residue class degree, and discriminant of L are given here; such fields L are classified into 4 or 8 classes according as q is odd or even with clear description of their structures. Then relative extension L/K is studied. L/K is proved to have a relative integral basis under certain simple conditions; relative discriminant D(L/K) is given explicitly; and necessary and sufficient conditions are obtained for D(L/K) to be generated by a rational square (and by a rational). In particular, it is proved that L/K has a relative integral basis and that D(L/K) is generated by a rational square if [L: K]≥x~* or x~*+1 (according as q is odd or even), where x~* is the exponent of Gal(L). These results contain many related results on similar fields in literature.

  9. Searching for Z(prime) bosons decaying to gluons

    International Nuclear Information System (INIS)

    The production and decay of a new heavy vector boson, a chromophilic Z(prime) vector boson, is described. The chromophilic Z(prime) couples only to two gluons, but its two-body decays are absent, leading to a dominant decay mode of Z(prime) → q(bar q)g. The unusual nature of the interaction predicts a cross-section which grows with mZ#prime# for a fixed coupling and an accompanying gluon with a coupling that rises with its energy. We study the t(bar t)g decay mode, proposing distinct reconstruction techniques for the observation of an excess and for the measurement of mZ#prime#. We estimate the sensitivity of current experimental datasets.

  10. Perception without awareness: further evidence from a Stroop priming task.

    Science.gov (United States)

    Daza, M Teresa; Ortells, Juan J; Fox, Elaine

    2002-11-01

    In the present research, we examined the influence of prime-target stimulus onset asynchrony (SOA) on Stroop-priming effects from masked words. Participants indicated the color of a central target, which was preceded by a 33-msec prime word followed either immediately or after a variable delay by a pattern mask. The prime word was incongruent or congruent with the target color on 75% and 25% of the trials, respectively. The words followed by an immediate mask produced reliable Stroop interference at SOAs of 300 and 400 msec but not at SOAs of 500 and 700 msec. The words followed by a delayed mask produced a reversed (i.e., facilitatory) Stroop effect, which reached significance at an SOA of 400 msec or longer, but never at the shorter 300-msec SOA. Such an differential time course of both types of Stroop priming effects provides further evidence for the existence of qualitative differences between conscious and nonconscious perceptual processes. PMID:12519028

  11. Two-temperature PCR for Microfluidics

    KAUST Repository

    Kodzius, Rimantas

    2010-05-01

    Since its invention in 1983, polymerase chain reaction (PCR) has been the method of choice for DNA amplification. Successful PCR depends on the optimization of several parameters, which is a cumbersome task due to the many variables (conditions and compon

  12. Mapping of Microsatellite SW943 to Porcine Chromosome 12p11-(2/3p13) Using Primed in situ Synthesis and Somatic Cell Hybrid Panel

    Institute of Scientific and Technical Information of China (English)

    LIU Bang; WANG Yong-qiang; ZHANG Qing-de; YU Mei; ZHAO Shu-hong; XIONG Tong-an; LI Kui

    2002-01-01

    The porcine microsatellite SW943 was regionally localized on 12p11-(2/3p13) by the two methods: the Primed in situ (PRINS) labelling on the pachytene bivalents of pigs using the Dig-11-dUTP as the report molecule and pig × rodent Somatic Cell Hybrid PaneI(SCHP) which contains 27 cell lines through PCR amplification. Advantages and disadvantages of the two methods for physical mapping of microsatellites were also discussed.

  13. Real Time PCR: Principles and Application

    OpenAIRE

    Safie Amini; Seyed-Moayed Alavian; Malek Hossein Ahmadipour

    2005-01-01

    The polymerase chain reaction (PCR) has been used as the new golden standard for detecting a wide variety of templates across a range of scientific specialties and also as an essential tool in research laboratories. PCR has completely revolutionized the detection of RNA and DNA viruses(1). Real Time vs. Traditional PCRReal time chemistry allows the detection of PCR amplification during the early phase of the reaction. Measuring the kinetic of the reaction in the early phase of PCR provides a ...

  14. Physics of EtaPrime->Pi+Pi-Eta and EtaPrime->Pi+Pi-Pi0 decays

    OpenAIRE

    Jany, Benedykt R.

    2007-01-01

    The article describes experimental status of EtaPrime->Pi+Pi-Eta and EtaPrime->Pi+Pi-Pi0 decays. A theoretical framework used for description of the decays mechanism is also reviewed. The possibilities for the measurements with WASA-at-COSY are mentioned.

  15. Ready for Prime Time: Implementing a Formal Afterschool Quality Improvement System by Prime Time Palm Beach County, Inc.

    Science.gov (United States)

    Spielberger, Julie; Lockaby, Tracey; Mayers, Leifa; Guterman, Kai

    2009-01-01

    This is the fourth report of a process evaluation of Palm Beach County Prime Time, Inc., an intermediary organization dedicated to improving the quality of afterschool programs, by Chapin Hall at the University of Chicago. It covers the 2007-2008 program year, which was the inaugural year of Prime Time's formal Quality Improvement System (QIS)…

  16. Adaptive response in zebrafish embryos induced using microbeam protons as priming dose and X-ray photons as challenging dose

    International Nuclear Information System (INIS)

    In the studies reported here, a high-linear-energy-transfer (high-LET)-radiation dose was used to induce adaptive response in zebrafish embryos in vivo. Microbeam protons were used to provide the priming dose and X-ray photons were employed to provide the challenging dose. The microbeam irradiation system (Single-Particle Irradiation System to Cell, acronym as SPICE) at the National Institute of Radiological Sciences (NIRS), Japan, was employed to control and accurately quantify the number of protons at very low doses, viz., about 100 μGy. The embryos were dechorionated at 4 h post fertilization (hpf) and irradiated at 5 hpf by microbeam protons. For each embryo, ten irradiation points were arbitrarily chosen without overlapping with one another. To each irradiation point, 5, 10 or 20 protons each with an energy of 3.4 MeV were delivered. The embryos were returned back to the incubator until 10 hpf to further receive the challenging exposure, which was achieved using 2 Gy of X-ray irradiation, and then again returned to the incubator until 24 hpf for analyses. The levels of apoptosis in zebrafish embryos at 25 hpf were quantified through terminal dUTP transferase-mediated nick end-labeling (TUNEL) assay, with the apoptotic signals captured by a confocal microscope. The results revealed that 5 to 20 protons delivered at 10 points each on the embryos, or equivalently 110 to 430 μGy, could induce radioadaptive response in the zebrafish embryos in vivo. (author)

  17. Growth kinetics of gamma-prime precipitates in a directionally solidified eutectic, gamma/gamma-prime-delta

    Science.gov (United States)

    Tewari, S. N.

    1976-01-01

    A directionally solidified eutectic alloy (DSEA), of those viewed as potential candidates for the next generation of aircraft gas turbine blade materials, is studied for the gamma-prime growth kinetics, in the system Ni-Nb-Cr-Al, specifically: Ni-20 w/o Nb-6 w/o Cr-2.5 w/o Al gamma/gamma-prime-delta DSEA. Heat treatment, polishing and etching, and preparation for electron micrography are described, and the size distribution of gamma-prime phase following various anneals is plotted, along with gamma-prime growth kinetics in this specific DSEA, and the cube of gamma-prime particle size vs anneal time. Activation energies and coarsening kinetics are studied.

  18. The rational variability of all empty space by prime numbers

    Directory of Open Access Journals (Sweden)

    Vinoo Cameron

    2013-03-01

    Full Text Available This mathematics manuscript has no conjecture, and the values of the half-line prime number are absolute and of simple pure mathematics by dual spiral cords that clearly spell out the distributive form of Prime numbers. The very clear half-line values for each prime numbers are made indirectly by using our continuous sieve of prime numbers ( Den otter/Hope research sieve or any other risky prime sieve .Half-line values for each prime number are constant by an ascension order ( 19=16 for instance. This is also done directly using the quadratic base to derive the variability, and the values of sets are constant. We have shown the characteristics of Prime numbers genesis and distribution, by clear sublime mathematics, that no living mathematician can question as the values are absolutely clear and that this is the way the creator created the prime numbers Now the concepts of current mathematics with regards to prime numbers are passé and in the authors opinion they are convoluted. The orientation of prime number distribution of the curved spiral is “warped variable constant” by spiral sets of fixed prime number distribution. The coordinates are fixed at 1:3 and the spiral sets are fixed; the orientation is however twisted and warped from each position as shown herein. The coordinates of the Chan point prime numbers 5:7 (14:16 19:23 are at the base and un-warped and this is evident topologically in any flat paper rendition of prime numbers, but after that the midline rotates by set orientation and topologically the spiral ascension has variable orientations but predictable dimension from any given point. This is the numbers theorem of space orientation, and dimension where all numbers represent their relationship to the half-line. Proof of this also is in the patent 1:3 diagram by topology shown below, and the “Chan point” by quadratic base and spiral orientation. 

  19. Paired Pulse Basis Functions for the Method of Moments EFIE Solution of Electromagnetic Problems Involving Arbitrarily-shaped, Three-dimensional Dielectric Scatterers

    Science.gov (United States)

    MacKenzie, Anne I.; Rao, Sadasiva M.; Baginski, Michael E.

    2007-01-01

    A pair of basis functions is presented for the surface integral, method of moment solution of scattering by arbitrarily-shaped, three-dimensional dielectric bodies. Equivalent surface currents are represented by orthogonal unit pulse vectors in conjunction with triangular patch modeling. The electric field integral equation is employed with closed geometries for dielectric bodies; the method may also be applied to conductors. Radar cross section results are shown for dielectric bodies having canonical spherical, cylindrical, and cubic shapes. Pulse basis function results are compared to results by other methods.

  20. Efficient computation of the spontaneous decay rate of arbitrarily shaped 3D nanosized resonators: a Krylov model-order reduction approach

    Science.gov (United States)

    Zimmerling, Jörn; Wei, Lei; Urbach, Paul; Remis, Rob

    2016-03-01

    We present a Krylov model-order reduction approach to efficiently compute the spontaneous decay (SD) rate of arbitrarily shaped 3D nanosized resonators. We exploit the symmetry of Maxwell's equations to efficiently construct so-called reduced-order models that approximate the SD rate of a quantum emitter embedded in a resonating nanostructure. The models allow for frequency sweeps, meaning that a single model provides SD rate approximations over an entire spectral interval of interest. Field approximations and dominant quasinormal modes can be determined at low cost as well.

  1. Analysis of EMS Mutagenized Soybean by Combination of DOP-PCR and GS-FLX

    International Nuclear Information System (INIS)

    Ethylmethanesulfonate (EMS) has been commonly used to induce mutations for various organisms because it led to irreversible mutations with a high level of frequency. With relatively few individuals, saturated mutagenized populations could be generated by chemical mutagens. Since high-throughput sequencing instruments, such as GS-20 or GS-FLX from Roche/454 Life Sciences are now available, characterization of nucleic acids and massive mutant analysis are more feasible. Due to the requirement of sequence information and high cost for designing primers, degenerate oligonucleotide primed PCR (DOP-PCR) instead of direct sequencing was used for single nucleotide polymorphisms (SNPs) survey. In this study, we screen point mutation in soybean mutants generated by EMS mutagenesis using a combination of DOP-PCR methodology and GS-FLX. Four different modified DOP-PCR primers were used for amplifying genomic DNA of three soybean genotypes, Sinpaldalkong 2, SS2-2 and 25-1-1. Then, nucleotide sequences of these amplified PCR products were analyzed by GS-FLX. Different number and length of contigs and singlets were constructed depending on soybean genotypes and nucleotide identity, after sequences were trimmed and aligned. With 100% in identity, average 1,100 contigs and 7,000 singlets were formed in each soybean genotype. In order to survey sequence polymorphisms, POLYBAYES was used with base quality consideration. A total of 1,187 putative SNPs were detected, and these polymorphisms should be reconfirmed by direct sequencing after a homology search against GenBank databases. (author)

  2. Analysis of EMS mutagenized soybean by combination of DOP-PCR and GS-FLX

    International Nuclear Information System (INIS)

    Ethylmethanesulfonate (EMS) causing point mutations were commonly used to induce mutations for various organisms because this leaded to irreversible mutations with high level of frequency. With relatively few individuals, saturated mutagenized populations could be generated by chemical mutagens. Since high-throughput sequencing instruments, such as GS-20 or GS-FLX from Roche/454 Life Sciences, are now available, characterization of nucleic acids and massive mutant analysis are more feasible. Due to the requirement of sequence information and high cost for designing primers, degenerate oligonucleotide primed PCR (DOP-PCR) instead of direct sequencing was used for single nucleotide polymorphisms (SNPs) survey. In this study, we screen point mutation in soybean mutants generated by EMS mutagenesis using combination of DOP-PCR methodology and GS-FLX. Four different modified DOP-PCR primers were used for amplifying genomic DNA of three soybean genotypes, Sinpaldalkong 2, SS2-2 and 25-1-1. And then, nucleotide sequences of these amplified PCR products were analyzed by GS-FLX. Different number and length of contigs and singlets were constructed depending on soybean genotypes and nucleotide identity, after sequences were trimmed and aligned. With 100% in identity, average 1,100 contigs and 7,000 singlets were formed in each soybean genotype. In order to survey sequence polymorphisms, POLYBAYES was used with base quality consideration. A total of putative 1,187 SNPs were detected and these polymorphisms should be reconfirmed by direct sequencing after homology search against GenBank databases. (author)

  3. FORMULAS AND POLYNOMIALS WHICH GENERATE PRIMES AND FERMAT PSEUDOPRIMES (COLLECTED PAPERS)

    OpenAIRE

    Marius COMAN

    2016-01-01

    This book brings together fifty-two papers regarding primes and Fermat pseudoprimes, submitted by the author to the scientific database Research Gate. Part One of this book, “Sequences of primes and conjectures on them”, contains papers on sequences of primes, squares of primes, semiprimes, pairs, triplets and quadruplets of primes and conjectures on them. This part also contains papers on possible methods to obtain large primes, some of them based on concatenation, some of them o...

  4. Application of cross-priming amplification (CPA) for detection of fowl adenovirus (FAdV) strains.

    Science.gov (United States)

    Niczyporuk, Jowita Samanta; Woźniakowski, Grzegorz; Samorek-Salamonowicz, Elżbieta

    2015-04-01

    Fowl adenoviruses (FAdVs) are widely distributed among chickens. Detection of FAdVs is mainly accomplished by virus isolation, serological assays, various polymerase chain reaction (PCR) assays, and loop-mediated isothermal amplification (LAMP). To increase the diagnostic capacity of currently applied techniques, cross-priming amplification (CPA) for the detection of the FAdV hexon gene was developed. The single CPA assay was optimised to detect all serotypes 1-8a-8b-11 representing the species Fowl aviadenovirus A-E. The optimal temperature and incubation time were determined to be 68 °C for 2 h. Using different incubation temperatures, it was possible to differentiate some FAdV serotypes. The results were recorded after addition of SYBR Green I(®) dye, which produced a greenish fluorescence under UV light. The CPA products separated by gel electrophoresis showed different "ladder-like" patterns for the different serotypes. The assay was specific for all serotypes of FAdV, and no cross-reactivity was observed with members of the genus Atadenovirus, duck atadenovirus A (egg drop syndrome virus EDS-76 [EDSV]) or control samples containing Marek's disease virus (MDV), infectious laryngotracheitis virus (ILTV) or chicken anaemia virus (CAV). The results of the newly developed FAdV-CPA were compared with those of real-time PCR. The sensitivity of CPA was equal to that of real-time PCR and reached 10(-2.0) TCID50, but the CPA method was more rapid and cheaper than the PCR systems. CPA is a highly specific, sensitive, efficient, and rapid tool for detection of all FAdV serotypes. This is the first report on the application of CPA for detection of FAdV strains. PMID:25655263

  5. Real-Time PCR (qPCR) Primer Design Using Free Online Software

    Science.gov (United States)

    Thornton, Brenda; Basu, Chhandak

    2011-01-01

    Real-time PCR (quantitative PCR or qPCR) has become the preferred method for validating results obtained from assays which measure gene expression profiles. The process uses reverse transcription polymerase chain reaction (RT-PCR), coupled with fluorescent chemistry, to measure variations in transcriptome levels between samples. The four most…

  6. Impact of a remote pump head on neonatal priming volumes.

    Science.gov (United States)

    Horisberger, J; Jegger, D; Boone, Y; Seigneul, I; Pierrel, N; Hurni, M; Corno, A F; von Segesser, L K

    1999-09-01

    Reduction of priming volumes of the cardiopulmonary bypass (CPB) circuit in neonatal cardiac surgery to decrease haemodilution and blood transfusion requirements can be achieved with the use of neonatal low prime oxygenators and smaller diameter tubing. We have further reduced our prime volume with the use of a custom-designed arm allowing for remote positioning of a double-headed roller pump. This arm enables the double pump to be placed alongside the main heart-lung machine close to the operating table, and to position the pump inlet and outlet tubing immediately at the reservoir outlet and oxygenator inlet, respectively, therefore reducing tubing lengths. Priming volumes of four cases using this configuration were compared to four cases using our standard neonatal bypass setup. Results showed a 29% decrease in priming volume and a 58% reduction in blood utilization during CPB. This reduction in priming volume is clinically significant as it lowers the ratio of priming volume to patient blood volume and reduces homologous blood requirements. PMID:10499651

  7. Interviewing to elicit information: Using priming to promote disclosure.

    Science.gov (United States)

    Dawson, Evan; Hartwig, Maria; Brimbal, Laure

    2015-10-01

    Research on implicit cognition has found that activating mental concepts can lead people to behave in ways that are consistent with the primed concept. In a pilot study we tested the effects of priming attachment security on the accessibility of disclosure-related concepts. Subsequently, we tested whether activating disclosure concepts by priming attachment security would influence people's forthcomingness. Participants (N = 102) delivered a flash drive to a confederate who exposed them to details of a mock eco terrorism conspiracy, which they were subsequently interviewed about. Before being interviewed, half of the participants were primed; the other half were not. Results showed that primed participants disclosed significantly more information than those who were not primed. Our findings highlight the need for further research on basic nonconscious processes in investigative interviews, as such influences can affect the outcome of the interview. The operation of nonconscious influences in such contexts has implications for practitioners, who may be able to utilize priming to facilitate disclosure. PMID:26076119

  8. An extracellular subtilase switch for immune priming in Arabidopsis.

    Directory of Open Access Journals (Sweden)

    Vicente Ramírez

    Full Text Available In higher eukaryotes, induced resistance associates with acquisition of a priming state of the cells for a more effective activation of innate immunity; however, the nature of the components for mounting this type of immunological memory is not well known. We identified an extracellular subtilase from Arabidopsis, SBT3.3, the overexpression of which enhances innate immune responses while the loss of function compromises them. SBT3.3 expression initiates a durable autoinduction mechanism that promotes chromatin remodeling and activates a salicylic acid(SA-dependent mechanism of priming of defense genes for amplified response. Moreover, SBT3.3 expression-sensitized plants for enhanced expression of the OXI1 kinase gene and activation of MAP kinases following pathogen attack, providing additional clues for the regulation of immune priming by SBT3.3. Conversely, in sbt3.3 mutant plants pathogen-mediated induction of SA-related defense gene expression is drastically reduced and activation of MAP kinases inhibited. Moreover, chromatin remodeling of defense-related genes normally associated with activation of an immune priming response appear inhibited in sbt3.3 plants, further indicating the importance of the extracellular SBT3.3 subtilase in the establishment of immune priming. Our results also point to an epigenetic control in the regulation of plant immunity, since SBT3.3 is up-regulated and priming activated when epigenetic control is impeded. SBT3.3 represents a new regulator of primed immunity.

  9. Seed priming: state of the art and new perspectives.

    Science.gov (United States)

    Paparella, S; Araújo, S S; Rossi, G; Wijayasinghe, M; Carbonera, D; Balestrazzi, Alma

    2015-08-01

    Priming applied to commercial seed lots is widely used by seed technologists to enhance seed vigour in terms of germination potential and increased stress tolerance. Priming can be also valuable to seed bank operators who need improved protocols of ex situ conservation of germplasm collections (crop and native species). Depending on plant species, seed morphology and physiology, different priming treatments can be applied, all of them triggering the so-called 'pre-germinative metabolism'. This physiological process takes place during early seed imbibition and includes the seed repair response (activation of DNA repair pathways and antioxidant mechanisms), essential to preserve genome integrity, ensuring proper germination and seedling development. The review provides an overview of priming technology, describing the range of physical-chemical and biological treatments currently available. Optimised priming protocols can be designed using the 'hydrotime concept' analysis which provides the theoretical bases for assessing the relationship between water potential and germination rate. Despite the efforts so far reported to further improve seed priming, novel ideas and cutting-edge investigations need to be brought into this technological sector of agri-seed industry. Multidisciplinary translational research combining digital, bioinformatic and molecular tools will significantly contribute to expand the range of priming applications to other relevant commercial sectors, e.g. the native seed market. PMID:25812837

  10. Evasiveness and the Distribution of Prime Numbers

    CERN Document Server

    Babai, Laszlo; Kulkarni, Raghav; Naik, Vipul

    2010-01-01

    We confirm the eventual evasiveness of several classes of monotone graph properties under widely accepted number theoretic hypotheses. In particular we show that Chowla's conjecture on Dirichlet primes implies that (a) for any graph $H$, "forbidden subgraph $H$" is eventually evasive and (b) all nontrivial monotone properties of graphs with $\\le n^{3/2-\\epsilon}$ edges are eventually evasive. ($n$ is the number of vertices.) While Chowla's conjecture is not known to follow from the Extended Riemann Hypothesis (ERH, the Riemann Hypothesis for Dirichlet's $L$ functions), we show (b) with the bound $O(n^{5/4-\\epsilon})$ under ERH. We also prove unconditional results: (a$'$) for any graph $H$, the query complexity of "forbidden subgraph $H$" is $\\binom{n}{2} - O(1)$; (b$'$) for some constant $c>0$, all nontrivial monotone properties of graphs with $\\le cn\\log n+O(1)$ edges are eventually evasive. Even these weaker, unconditional results rely on deep results from number theory such as Vinogradov's theorem on the G...

  11. Improvements to self priming centrifugal pumps

    International Nuclear Information System (INIS)

    This invention concerns a self priming centrifugal pump for dangerous liquids, high radioactive, flammable, explosive and very toxic liquids for instance, for which it is necessary to enclose the equipment in a biological protection cell, as is done in the nuclear industry (reprocessing of irradiated fuels). The device ensures that all the gases and radioactive and toxic aerosols present in the delivery pipe are returned through leak tight pipes into the drawing tank, the gaseous top of which is connected to a gas processing plant, without it being possible for them to escape from the plant and contaminate the cell or penetrate into an apparatus such as a filter under pressure that cannot work in their presence. The pump impeller cage is provided with horizontal partitions which define the pump body, a lower suction chamber, a middle delivery chamber and an upper venting chamber respectively connected to a suction pipe, a delivery pipe and a venting pipe connected to a gas processing unit significantly at atmospheric pressure. Leak tightness between these different chambers and the body of the pump is provided by three ring seals resting on the truncated part of the pump body as well as by an internal gasket fixed between the motor shaft and the upper wall of the venting chamber. As all the pipes are attached to the fixed pump body, the removable unit may be easily taken out or placed back simply by moving it vertically upwards

  12. Migratory organizing pneumonitis `primed` by radiation therapy

    Energy Technology Data Exchange (ETDEWEB)

    Bayle, J.Y.; Nesme, P.; Guerin, J.C. [Hopital de la Croix Rousse, Service de Pneumologie, Lyon (France); Bejui-Thivolet, F. [Hopital de la Croix Rousse, Laboratorie d`Anatomopatologie, Lyon (France); Loire, R. [Hopital Cardiovasculaire et Pneumologique, Universite Claude Bernard, Laboratoire d`Anatomopathologie, Lyon (France); Cordier, J.F. [Hopital Cardiovasculaire et Pneumologique, Universite Claude Bernard, Service de Pneumologie, Lyon (France)

    1995-02-01

    We report on two women presenting with cough and fever, 4 and 7 months, respectively, after starting breast radiation therapy following surgery for breast carcinoma. Chest roentgenogram and computed tomographic (CT) scan demonstrated alveolar opacities, initially limited to the pulmonary area next to the irradiated breast, but later migrating within both lungs. Intra-alveolar granulation tissue was found in transbronchial lung biopsies. Corticosteroid treatment resulted in dramatic clinical improvment, together with complete clearing of the pulmonary opacities on chest imaging. However, clinical and imaging relapses occurred when corticosteroids were withdrawn too rapidly; with further improvment when they were reintroduced. The reported cases clearly differ from radiation pneumonitis. They were fairly typical of cryptogenic organizing pneumonitis, also called idiopathic bronchiolitis obliterans organizing pneumonia, with the exception of the radiation therapy, partially affecting the lung, which had been performed within the previous months. Since focal radiation therapy involving the lung may induce diffuse bilateral lymphocytic alveolitis, we hypothesize that this may `prime` the lung to further injury, leading to cryptogenic organizing pneumonitis. (au) (26 refs.).

  13. Migratory organizing pneumonitis 'primed' by radiation therapy

    International Nuclear Information System (INIS)

    We report on two women presenting with cough and fever, 4 and 7 months, respectively, after starting breast radiation therapy following surgery for breast carcinoma. Chest roentgenogram and computed tomographic (CT) scan demonstrated alveolar opacities, initially limited to the pulmonary area next to the irradiated breast, but later migrating within both lungs. Intra-alveolar granulation tissue was found in transbronchial lung biopsies. Corticosteroid treatment resulted in dramatic clinical improvment, together with complete clearing of the pulmonary opacities on chest imaging. However, clinical and imaging relapses occurred when corticosteroids were withdrawn too rapidly; with further improvment when they were reintroduced. The reported cases clearly differ from radiation pneumonitis. They were fairly typical of cryptogenic organizing pneumonitis, also called idiopathic bronchiolitis obliterans organizing pneumonia, with the exception of the radiation therapy, partially affecting the lung, which had been performed within the previous months. Since focal radiation therapy involving the lung may induce diffuse bilateral lymphocytic alveolitis, we hypothesize that this may 'prime' the lung to further injury, leading to cryptogenic organizing pneumonitis. (au) (26 refs.)

  14. Chemical Priming of Plants Against Multiple Abiotic Stresses: Mission Possible?

    KAUST Repository

    Savvides, Andreas

    2015-12-15

    Crop plants are subjected to multiple abiotic stresses during their lifespan that greatly reduce productivity and threaten global food security. Recent research suggests that plants can be primed by chemical compounds to better tolerate different abiotic stresses. Chemical priming is a promising field in plant stress physiology and crop stress management. We review here promising chemical agents such as sodium nitroprusside, hydrogen peroxide, sodium hydrosulfide, melatonin, and polyamines that can potentially confer enhanced tolerance when plants are exposed to multiple abiotic stresses. The challenges and opportunities of chemical priming are addressed, with the aim to boost future research towards effective application in crop stress management.

  15. Chemical Priming of Plants Against Multiple Abiotic Stresses: Mission Possible?

    Science.gov (United States)

    Savvides, Andreas; Ali, Shawkat; Tester, Mark; Fotopoulos, Vasileios

    2016-04-01

    Crop plants are subjected to multiple abiotic stresses during their lifespan that greatly reduce productivity and threaten global food security. Recent research suggests that plants can be primed by chemical compounds to better tolerate different abiotic stresses. Chemical priming is a promising field in plant stress physiology and crop stress management. We review here promising chemical agents such as sodium nitroprusside, hydrogen peroxide, sodium hydrosulfide, melatonin, and polyamines that can potentially confer enhanced tolerance when plants are exposed to multiple abiotic stresses. The challenges and opportunities of chemical priming are addressed, with the aim to boost future research towards effective application in crop stress management. PMID:26704665

  16. An easy method for finding many very large prime numbers

    OpenAIRE

    Euler, Leonhard

    2005-01-01

    Translated from the Latin original "Facillima methodus plurimos numeros primos praemagnos inveniendi" (1778). E718 in the Enestrom index. If m is a number of the form 4k+1 and is a sum of two relatively prime squares, then it is prime if and only if it is not the sum of two other squares. In this paper Euler wants to generalize this criterion. He looks at when 232aa+1 represents a prime number. He uses his "numeri idonei" (suitable numbers, convenient numbers, idoneal numbers).

  17. Formulas giving prime numbers under Cram\\'er's conjecture

    OpenAIRE

    Farhi, Bakir

    2006-01-01

    Under Cram\\'er's conjecture concerning the prime numbers, we prove that for any $x>1$, there exists a real $A=A(x)>1$ for which the formula $[A^{n^x}]$ (where $[]$ denotes the integer part) gives a prime number for any positive integer $n$. Under the same conjecture, we also prove that for any $\\epsilon>0$, there exists a positive real number $B$ for which the formula $[B.{n!}^{2+\\epsilon}]$ gives a prime number for any sufficiently large positive integer $n$.

  18. Prime polynomials in short intervals and in arithmetic progressions

    OpenAIRE

    Bank, Efrat; Bary-Soroker, Lior; Rosenzweig, Lior

    2013-01-01

    In this paper we establish function field versions of two classical conjectures on prime numbers. The first says that the number of primes in intervals $(x,x+x^{\\epsilon}]$ is about $x^{\\epsilon}/\\log x$ . The second says that the number of primes $p\\lt x$ in the arithmetic progression $p\\equiv a\\ (\\mathrm{mod}\\ d)$ , for $d\\lt x^{1-\\delta}$ , is about $\\frac{\\pi(x)}{\\phi(d)}$ , where $\\phi$ is the Euler totient function. ¶ More precisely, for short intervals we prove: Let $k$ be a fixe...

  19. Cloning a Full-length cDNA Encoding UDP-glucose Pyrophosphorylase from Amorpha fruticosa by PCR-based Methods

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    A method based on degenerate Oligo-primed polymerase chain reaction (PCR) and random amplification of cDNA end (RACE) PCR for cloning a full-length cDNA is described. An Amorpha fruticosa cDNA clone encoding UDP-glucose pyrophosphorylase (UGP), a key enzyme producing UDP-glucose in the synthesis of sucrose and cell ulose, is cloned by using this method. We design 5' RACE primers based on UGP A1 fragment, which obtains from degenerate PCR. Inverse PCR and nested PCR enable cloning of the remainder 5' and 3' end fragments of the gene. The deduced amino acid sequence exhibits significant homology with the other UGP genes cloned. This method is more simple and inexpensive than screening cDNA library, and can be easily adapted to clone other genes.

  20. Chip PCR. I. Surface passivation of microfabricated silicon-glass chips for PCR.

    OpenAIRE

    Shoffner, M A; Cheng, J; Hvichia, G E; Kricka, L J; Wilding, P.

    1996-01-01

    The microreaction volumes of PCR chips (a microfabricated silicon chip bonded to a piece of flat glass to form a PCR reaction chamber) create a relatively high surface to volume ratio that increases the significance of the surface chemistry in the polymerase chain reaction (PCR). We investigated several surface passivations in an attempt to identify 'PCR friendly' surfaces and used those surfaces to obtain amplifications comparable with those obtained in conventional PCR amplification systems...

  1. Subliminal repetition primes help detection of phonemes in a picture: Evidence for a phonological level of the priming effects.

    Science.gov (United States)

    Manoiloff, Laura; Segui, Juan; Hallé, Pierre

    2016-01-01

    In this research, we combine a cross-form word-picture visual masked priming procedure with an internal phoneme monitoring task to examine repetition priming effects. In this paradigm, participants have to respond to pictures whose names begin with a prespecified target phoneme. This task unambiguously requires retrieving the word-form of the target picture's name and implicitly orients participants' attention towards a phonological level of representation. The experiments were conducted within Spanish, whose highly transparent orthography presumably promotes fast and automatic phonological recoding of subliminal, masked visual word primes. Experiments 1 and 2 show that repetition primes speed up internal phoneme monitoring in the target, compared to primes beginning with a different phoneme from the target, or sharing only their first phoneme with the target. This suggests that repetition primes preactivate the phonological code of the entire target picture's name, hereby speeding up internal monitoring, which is necessarily based on such a code. To further qualify the nature of the phonological code underlying internal phoneme monitoring, a concurrent articulation task was used in Experiment 3. This task did not affect the repetition priming effect. We propose that internal phoneme monitoring is based on an abstract phonological code, prior to its translation into articulation. PMID:25679503

  2. An enhanced method for sequence walking and paralog mining: TOPO® Vector-Ligation PCR

    Directory of Open Access Journals (Sweden)

    Davis Thomas M

    2010-03-01

    Full Text Available Abstract Background Although technological advances allow for the economical acquisition of whole genome sequences, many organisms' genomes remain unsequenced, and fully sequenced genomes may contain gaps. Researchers reliant upon partial genomic or heterologous sequence information require methods for obtaining unknown sequences from loci of interest. Various PCR based techniques are available for sequence walking - i.e., the acquisition of unknown DNA sequence adjacent to known sequence. Many such methods require rigid, elaborate protocols and/or impose narrowly confined options in the choice of restriction enzymes for necessary genomic digests. We describe a new method, TOPO® Vector-Ligation PCR (or TVL-PCR that innovatively integrates available tools and familiar concepts to offer advantages as a means of both targeted sequence walking and paralog mining. Findings TVL-PCR exploits the ligation efficiency of the pCR®4-TOPO® (Invitrogen, Carlsbad, California vector system to capture fragments of unknown sequence by creating chimeric molecules containing defined priming sites at both ends. Initially, restriction enzyme-digested genomic DNA is end-repaired to create 3' adenosine overhangs and is then ligated to pCR4-TOPO vectors. The ligation product pool is used directly as a template for nested PCR, using specific primers to target orthologous sequences, or degenerate primers to enable capture of paralogous gene family members. We demonstrated the efficacy of this method by capturing entire coding and partial promoter sequences of several strawberry Superman-like genes. Conclusions TVL-PCR is a convenient and efficient method for DNA sequence walking and paralog mining that is applicable to any organism for which relevant DNA sequence is available as a basis for primer design.

  3. Benefits of rice seed priming are offset permanently by prolonged storage and the storage conditions.

    Science.gov (United States)

    Hussain, Saddam; Zheng, Manman; Khan, Fahad; Khaliq, Abdul; Fahad, Shah; Peng, Shaobing; Huang, Jianliang; Cui, Kehui; Nie, Lixiao

    2015-01-01

    Seed priming is a commercially successful practice, but reduced longevity of primed seeds during storage may limit its application. We established a series of experiments on rice to test: (1) whether prolonged storage of primed and non-primed rice seeds for 210 days at 25°C or -4°C would alter their viability, (2) how long primed rice seed would potentially remain viable at 25°C storage, and (3) whether or not post-storage treatments (re-priming or heating) would reinstate the viability of stored primed seeds. Two different rice cultivars and three priming agents were used in all experiments. Prolonged storage of primed seeds at 25°C significantly reduced the germination (>90%) and growth attributes (>80%) of rice compared with un-stored primed seeds. However, such negative effects were not observed in primed seeds stored at -4°C. Beneficial effects of seed priming were maintained only for 15 days of storage at 25°C, beyond which the performance of primed seeds was worse even than non-primed seeds. The deteriorative effects of 25°C storage were related with hampered starch metabolism in primed rice seeds. None of the post-storage treatments could reinstate the lost viability of primed seeds suggesting that seeds become unviable by prolonged post-priming storage at 25°C. PMID:25631923

  4. Prime Hook NWR Marsh Restoration Project Summary & Monitoring Plan 2015

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This living document provides a condensed explanation of wetland management history and a large-scale tidal marsh restoration project at Prime Hook NWR in Delaware....

  5. Prime Numbers, Quantum Field Theory and the Goldbach Conjecture

    Science.gov (United States)

    Sanchis-Lozano, Miguel-Angel; Barbero G., J. Fernando; Navarro-Salas, José

    2012-09-01

    Motivated by the Goldbach conjecture in number theory and the Abelian bosonization mechanism on a cylindrical two-dimensional space-time, we study the reconstruction of a real scalar field as a product of two real fermion (so-called prime) fields whose Fourier expansion exclusively contains prime modes. We undertake the canonical quantization of such prime fields and construct the corresponding Fock space by introducing creation operators bp\\dag — labeled by prime numbers p — acting on the vacuum. The analysis of our model, based on the standard rules of quantum field theory and the assumption of the Riemann hypothesis, allows us to prove that the theory is not renormalizable. We also comment on the potential consequences of this result concerning the validity or breakdown of the Goldbach conjecture for large integer numbers.

  6. Introduction Management Plan Prime Hook National Wildlife Refuge 1987

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This is a detailed outline of the Prime Hook National Wildlife Refuge that includes information on the following topics: Location, History of the Refuge,...

  7. Generators of nonassociative simple Moufang loops over finite prime fields

    OpenAIRE

    Vojtěchovský, Petr

    2007-01-01

    We present an elementary proof that the nonassociative simple Moufang loops over finite prime fields are generated by three elements. In the last section, we conclude that integral Cayley numbers of unit norm are generated multiplicatively by three elements.

  8. The role of selective attention in perceptual and affective priming

    Science.gov (United States)

    Stone, M.; Ladd, S. L.; Gabrieli, J. D.

    2000-01-01

    Two kinds of perceptual priming (word identification and word fragment completion), as well as preference priming (that may rely on special affective mechanisms) were examined after participants either read or named the colors of words and nonwords at study. Participants named the colors of words more slowly than the colors of nonwords, indicating that lexical processing of the words occurred at study. Nonetheless, priming on all three tests was lower after color naming than after reading, despite evidence of lexical processing during color naming shown by slower responses to words than to nonwords. These results indicate that selective attention to (rather than the mere processing of) letter string identity at study is important for subsequent repetition priming.

  9. Duck Virus Enteritis for Prime Hook National Wildlife Refuge 1974

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report discusses some of the options for managing the large numbers of waterfowl should there be an outbreak of the Duck Virus Enteritis Disease at the Prime...

  10. Animal Control Plan Prime Hook National Wildlife Refuge 1987

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document contains a discussion of programs of the refuge as they relate to animal control and plans for managing these resources at Prime Hook National...

  11. On the sum of the first n prime numbers

    OpenAIRE

    Axler, Christian

    2014-01-01

    In this paper we establish a general asymptotic formula for the sum of the first n prime numbers, which leads to a generalization of the most accurate asymptotic formula given by Massias and Robin in 1996.

  12. Prime Hook National Wildlife Refuge [Land Status Map

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This map was produced by the Division of Realty to depict landownership at Prime Hook National Wildlife Refuge. It was generated from rectified aerial photography,...

  13. Priming effects under correct change detection and change blindness.

    Science.gov (United States)

    Caudek, Corrado; Domini, Fulvio

    2013-03-01

    In three experiments, we investigated the priming effects induced by an image change on a successive animate/inanimate decision task. We studied both perceptual (Experiments 1 and 2) and conceptual (Experiment 3) priming effects, under correct change detection and change blindness (CB). Under correct change detection, we found larger positive priming effects on congruent trials for probes representing animate entities than for probes representing artifactual objects. Under CB, we found performance impairment relative to a "no-change" baseline condition. This inhibition effect induced by CB was modulated by the semantic congruency between the changed item and the probe in the case of probe images, but not for probe words. We discuss our results in the context of the literature on the negative priming effect. PMID:22964454

  14. Interim Land Use Plan Prime Hook National Wildlife Refuge 1967

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The continued grazing of cattle on grasslands and marsh acquired by the Prime Hook National Wildlife Refuge will be designed to retard the development of...

  15. On the appearance of primes in linear recursive sequences

    Directory of Open Access Journals (Sweden)

    Jaroma John H

    2005-01-01

    Full Text Available We present an application of difference equations to number theory by considering the set of linear second-order recursive relations, , U0 = 0, U1 = 1, and , , where R and Q are relatively prime integers and n ∈ {0,1,...}. These equations describe the set of extended Lucas sequences, or rather, the Lehmer sequences. We add that the rank of apparition of an odd prime p in a specific Lehmer sequence is the index of the first term that contains p as a divisor. In this paper, we obtain results that pertain to the rank of apparition of primes of the form 2n p ± 1. Upon doing so, we will also establish rank of apparition results under more explicit hypotheses for some notable special cases of the Lehmer sequences. Presently, there does not exist a closed formula that will produce the rank of apparition of an arbitrary prime in any of the aforementioned sequences.

  16. Myeloperoxidase induces the priming of platelets.

    Science.gov (United States)

    Kolarova, H; Klinke, A; Kremserova, S; Adam, M; Pekarova, M; Baldus, S; Eiserich, J P; Kubala, L

    2013-08-01

    The release of myeloperoxidase (MPO) from polymorphonuclear neutrophils is a hallmark of vascular inflammation and contributes to the pathogenesis of vascular inflammatory processes. However, the effects of MPO on platelets as a contributory mechanism in vascular inflammatory diseases remain unknown. Thus, MPO interaction with platelets and its effects on platelet function were examined. First, dose-dependent binding of MPO (between 1.7 and 13.8nM) to both human and mouse platelets was observed. This was in direct contrast to the absence of MPO in megakaryocytes. MPO was localized both on the surface of and inside platelets. Cytoskeleton inhibition did not prevent MPO localization inside the three-dimensional platelet structure. MPO peroxidase activity was preserved upon the MPO binding to platelets. MPO sequestered in platelets catabolized NO, documented by the decreased production of NO (on average, an approximately 2-fold decrease). MPO treatment did not affect the viability of platelets during short incubations; however, it decreased platelet viability after long-term storage for 7 days (an approximately 2-fold decrease). The activation of platelets by MPO was documented by an MPO-mediated increase in the expression of surface platelet receptors P-selectin and PECAM-1 (of about 5 to 20%) and the increased formation of reactive oxygen species (of about 15 to 200%). However, the activation was only partial, as MPO did not induce the aggregation of platelets nor potentiate platelet response to classical activators. Nor did MPO induce a significant release of the content of granules. The activation of platelets by MPO was connected with increased MPO-treated platelet interaction with polymorphonuclear leukocytes (an approximately 1.2-fold increase) in vitro. In conclusion, it can be suggested that MPO can interact with and activate platelets, which can induce priming of platelets, rather than the classical robust activation of platelets. This can contribute to the

  17. Functional Neuroimaging of Word Priming in Males with Chronic Schizophrenia

    OpenAIRE

    Han, S Duke; Nestor, Paul G.; Hale-Spencer, Magdalena; Cohen, Adam; Niznikiewicz, Margaret; McCarley, Robert W.; Wible, Cynthia G.

    2007-01-01

    Word-priming studies have suggested that the associative disturbance of schizophrenia may reflect aberrant spread of activation through the lexicon of the brain. To explore this, we examined lexical activation using a semantic word-priming paradigm coupled with functional magnetic resonance imaging (fMRI). We also wanted to determine whether brain activation to this paradigm correlated with relevant clinical symptom measures. In addition to completing clinical symptom measures, twelve chronic...

  18. LEAD AND MERCURY EACH AS PRIME MATTER IN ALCHEMY

    OpenAIRE

    Mahdihassan, S.

    1988-01-01

    Prime Matter is matter-cum-energy. The first substance identified as such was lead. When gently heated it becomes red and redness means soul or energy so that lead was potentially red or soul-like and as such dual natured. Mercury also becomes red and can return to white metal. It was thus dual natured and was the second substance recognized as Prime Matter. First lead alone and then lead and mercury were considered as the source of all metals.

  19. Applicability of subsistence prime vendor to contingency rations

    OpenAIRE

    Bailey, David B.

    1996-01-01

    The research objective of this thesis is to assess how the Prime Vendor program can provide the military with an exceptional distribution and inventory control method in the event of a contingency. Precisely how wartime resupply will occur is an unresolved issue in current contingency plans. The idea of outsourcing operations (through Prime Vendor) that do not add 'value' to the military enterprise has merit. However, with the introduction of commercial suppliers, the military will still reta...

  20. ON THE THETA OPERATOR FOR MODULAR FORMS MODULO PRIME POWERS

    DEFF Research Database (Denmark)

    Chen, Imin; Kiming, Ian

    2016-01-01

    We consider the classical theta operator θ on modular forms modulo pm and level N prime to p, where p is a prime greater than three. Our main result is that θ mod pm will map forms of weight k to forms of weight k+2+2pm−1(p−1) and that this weight is optimal in certain cases when m is at least two...

  1. Topological Aspects of Infinitude of Primes in Arithmetic Progressions

    Czech Academy of Sciences Publication Activity Database

    Marko, F.; Porubský, Štefan

    2015-01-01

    Roč. 140, č. 2 (2015), s. 221-237. ISSN 0010-1354 R&D Projects: GA ČR(CZ) GAP201/12/2351 Institutional support: RVO:67985807 Keywords : coset topology * topological semigroup * topological density * Dirichlet theorem on primes * arithmetical progression * maximal ideal * ring of finite character * residually finite ring * infinitude of primes * pseudoprime Subject RIV: BA - General Mathematics Impact factor: 0.453, year: 2014

  2. The prime factorization property of entangled quantum states

    OpenAIRE

    Fivel, Daniel I.

    1994-01-01

    Completely entangled quantum states are shown to factorize into tensor products of entangled states whose dimensions are powers of prime numbers. The entangled states of each prime-power dimension transform among themselves under a finite Heisenberg group. We are thus led to examine processes in which factors are exchanged between entangled states and so consider canonical ensembles in which these processes occur. It is shown that the Riemann zeta function is the appropriate partition functio...

  3. Scale-invariant correlations and the distribution of prime numbers

    International Nuclear Information System (INIS)

    Negative correlations in the distribution of prime numbers are found to display a scale invariance. This occurs in conjunction with a nonstationary behavior. We compare the prime number series to a type of fractional Brownian motion which incorporates both the scale invariance and the nonstationary behavior. Interesting discrepancies remain. The scale invariance also appears to imply the Riemann hypothesis and we study the use of the former as a test of the latter.

  4. Upper bounds for prime gaps related to Firoozbakht's conjecture

    OpenAIRE

    Kourbatov, Alexei

    2015-01-01

    We study two kinds of conjectural bounds for the prime gap after the k-th prime $p_k$: (A) $p_{k+1} 9$. The upper bound (A) is equivalent to Firoozbakht's conjecture. We prove that (A) implies (B) with $b=1$; on the other hand, (B) with $b=1.17$ implies (A). We also give other sufficient conditions for (A) that have the form (B) with $b\\to1$ as $p_k\\to\\infty$.

  5. A study on arithmetical functions and the prime number theorem

    Science.gov (United States)

    Imm, Yeoh Saw

    2014-06-01

    In this paper, Leibniz triangle and suitable binomial coefficients were used to get the bounds of ψ (x) . Using the generalized convolution and the differentiation on generalized convolution of arithmetical functions, we get to prove Tatuzawa-Izeki identity. Selberg's asymptotic formula is included as a special case, which is the beginning of certain elementary proofs of the Prime Number Theorem. Integration is used on some related inequalities to provide a smoother elementary proof of the Prime Number Theorem.

  6. Scale-invariant correlations and the distribution of prime numbers

    Energy Technology Data Exchange (ETDEWEB)

    Holdom, B [Department of Physics, University of Toronto, Toronto, ON M5S1A7 (Canada)], E-mail: bob.holdom@utoronto.ca

    2009-08-28

    Negative correlations in the distribution of prime numbers are found to display a scale invariance. This occurs in conjunction with a nonstationary behavior. We compare the prime number series to a type of fractional Brownian motion which incorporates both the scale invariance and the nonstationary behavior. Interesting discrepancies remain. The scale invariance also appears to imply the Riemann hypothesis and we study the use of the former as a test of the latter.

  7. Sequential congruency effects: disentangling priming and conflict adaptation.

    Science.gov (United States)

    Puccioni, Olga; Vallesi, Antonino

    2012-09-01

    Responding to the color of a word is slower and less accurate if the word refers to a different color (incongruent condition) than if it refers to the same color (congruent condition). This phenomenon, known as the Stroop effect, is modulated by sequential effects: it is bigger when the current trial is preceded by a congruent condition than by an incongruent one in the previous trial. Whether this phenomenon is due to priming mechanisms or to cognitive control is still debated. To disentangle the contribution of priming with respect to conflict adaptation mechanisms in determining sequential effects, two experiments were designed here with a four-alternative forced choice (4-AFC) Stroop task: in the first one only trials with complete alternations of features were used, while in the second experiment all possible types of repetitions were presented. Both response times (RTs) and errors were evaluated. Conflict adaptation effects on RTs were limited to congruent trials and were exclusively due to priming: they disappeared in the priming-free experiment and, in the second experiment, they occurred in sequences with feature repetitions but not in complete alternation sequences. Error results, instead, support the presence of conflict adaptation effects in incongruent trials. In priming-free sequences (experiment 1 and complete alternation sequences of experiment 2) with incongruent previous trials there was no error Stroop effect, while this effect was significant with congruent previous trials. These results indicate that cognitive control may modulate performance above and beyond priming effects. PMID:21735040

  8. Word Meaning Frequencies Affect Negative Compatibility Effects In Masked Priming.

    Science.gov (United States)

    Brocher, Andreas; Koenig, Jean-Pierre

    2016-01-01

    Negative compatibility effects (NCEs)-that is, slower responses to targets in related than unrelated prime-target pairs, have been observed in studies using stimulus-response (S-R) priming with stimuli like arrows and plus signs. Although there is no consensus on the underlying mechanism, explanations tend to locate NCEs within the motor-response system. A characteristic property of perceptuo-motor NCEs is a biphasic pattern of activation: A brief period in which very briefly presented (typically) masked primes facilitate processing of related targets is followed by a phase of target processing impairment. In this paper, we present data that suggest that NCEs are not restricted to S-R priming with low-level visual stimuli: The brief (50 ms), backward masked (250 ms) presentation of ambiguous words (bank) leads to slower responses than baseline to words related to the more frequent (rob) but not less frequent meaning (swim). Importantly, we found that slowed responses are preceded by a short phase of response facilitation, replicating the biphasic pattern reported for arrows and plus signs. The biphasic pattern of priming and the fact that the NCEs were found only for target words that are related to their prime word's more frequent meaning has strong implications for any theory of NCEs that locate these effects exclusively within the motor-response system. PMID:27152129

  9. Treatment conditions and biochemical processes influencing seed priming effectiveness

    Directory of Open Access Journals (Sweden)

    Giuseppe Di Girolamo

    2012-05-01

    Full Text Available A review of the scientific literature indicates osmotic priming (osmopriming as the principal method of seed priming and polyethylene glycol (PEG as the principal osmotic agent. An analysis of the available data across experiments carried out with different species under varying conditions showed an average 11% increase in percent germination and 36% shorter mean germination time (MGT in primed vs. unprimed seeds. Moreover, in primed seeds MGT was less dependent on temperature, which is consistent with the effects expected from the treatment. Priming effects are mainly influenced by osmotic potential, temperature and time; major biochemical processes (repair of damaged DNA and RNA, preparation for cell division and increased antioxidant activity are involved in treatment effects to an extent which is not fully ascertained in literature. A reduction of seed storage life is the major disadvantage of priming and the principal constraint to its diffusion, since dehydration to the initial moisture (drying-back is needed to allow seed storage. Seed behaviour during drying-back, the role of the raffinose family oligosaccharides in cell membrane integrity and the expression of antioxidant enzymes in germinating seeds need to be further elucidated in a sufficient number of species, to promote a more reliable use of this technique.

  10. Self-regulation of priming effects on behavior.

    Science.gov (United States)

    Gollwitzer, Peter M; Sheeran, Paschal; Trötschel, Roman; Webb, Thomas L

    2011-07-01

    In three experiments, we tested whether people can protect their ongoing goal pursuits from antagonistic priming effects by using if-then plans (i.e., implementation intentions). In Experiment 1, concept priming did not influence lexical decision time for a critical stimulus when participants had formed if-then plans to make fast responses to that stimulus. In Experiment 2, participants who were primed with a prosocial goal allowed a confederate who asked for help to interrupt their work on a focal task for a longer time if they had merely formed goal intentions to perform well than if they had also formed implementation intentions for concentrating on the task. In Experiment 3, priming the goal of being fast increased driving speed and errors for participants who had formed mere goal intentions to drive only as fast as safety allowed or who had formed no goal intentions, whereas the driving of participants who had formed such goal intentions as well as implementation intentions showed no such priming effects. Our findings indicate that implementation intentions are an effective self-regulatory tool for shielding actions from disruptive concept- or goal-priming effects. PMID:21652777

  11. Assessment of the real-time PCR and different digital PCR platforms for DNA quantification

    OpenAIRE

    Pavšič, Jernej; Žel, Jana; Milavec, Mojca

    2015-01-01

    Digital PCR (dPCR) is beginning to supersede real-time PCR (qPCR) for quantification of nucleic acids in many different applications. Several analytical properties of the two most commonly used dPCR platforms, namely the QX100 system (Bio-Rad) and the 12.765 array of the Biomark system (Fluidigm), have already been evaluated and compared with those of qPCR. However, to the best of our knowledge, direct comparison between the three of these platforms using the same DNA material has not been do...

  12. Detection of Eperythrozoon wenyoni by PCR assay

    Institute of Scientific and Technical Information of China (English)

    Jian WANG; Yutao ZHU; Jianhua QIN; Fumei ZHANG; Yuelan ZHAO

    2009-01-01

    The objective of this research was to develop a detection method for Eperythrozoon wenyoni infection using polymerase chain reaction (PCR) assay technique. A pair of primers was designed and synthesized according to the conservative sequence 16S rRNA. The PCR assay was performed with the primers. A 985-bp fragment was amplified by using PCR. The amplified fragments with the expected size were identified by EcoR I restriction digestion. The crossing-reaction, specific-reaction and duplicate-reaction indicated that the PCR method is a specific, sensitive, fast and effective method for diagnosing E. Wenyoni infection at group level.

  13. Color coherent effects in (e,e{prime}N) and (e,e{prime}N,N(h)) processes at CEBAF

    Energy Technology Data Exchange (ETDEWEB)

    Frankfurt, L.L.; Sargsyan, M.M. [Tel Aviv Univ. (Israel); Strikman, M.I. [Pennsylvania State Univ., University Park, PA (United States)]|[St. Petersburg Nuclear Physics Inst. (Russian Federation)

    1994-04-01

    The options for investigating color coherent effects and competing nuclear effects of nucleon-nucleon correlations in nuclei, nuclear shell effects in (e, e{prime}N) and (e, e{prime}NN(h)) reactions are considered. They argue that extension of CEBAF energies to reach Q{sup 2} = 10 GeV{sup 2} will allow systematical investigations of color coherent effects in nonperturbative regime of QCD and their interplay with nuclear effects.

  14. Verification of the Firoozbakht conjecture for primes up to four quintillion

    OpenAIRE

    Kourbatov, Alexei

    2015-01-01

    If $p_k$ is the k-th prime, the Firoozbakht conjecture states that the sequence $(p_k)^{1/k}$ is strictly decreasing. We use the table of first-occurrence prime gaps in combination with known bounds for the prime-counting function to verify the Firoozbakht conjecture for primes up to four quintillion $(4\\times10^{18})$.

  15. Mersenne素数的研究进展%Progress in Research of Mersenne Primes

    Institute of Scientific and Technical Information of China (English)

    张四保; 陈良志; 阿布都瓦克·玉奴司

    2012-01-01

    就Mersenne素数的基本理论、探寻史、分布规律、有关猜想、探究意义及相关问题的研究情况作一综述,并提出了一些有待解决的问题.%Mersenne primes are a special kind of primes. The study of Mersenne prime effeetivily has been a hot and difficult point in mathematical researches. Since the prime has been presented, the study on it has been enlarged under the progrome of Great Internet Mersenne Prime Search. In the paper, in order to take interested readers rapidly to the research frontier, we present an overall survey on Mersenne prime in four aspects: the history of researching Mersenne prime, the distribution of Mersenne prime, guesses and problems of Mersenne prime and the significance of Mersenne prime.

  16. [One-step PCR sequencing]. Final report, July 1, 1994--August 31, 1997

    Energy Technology Data Exchange (ETDEWEB)

    Shaw, B.R.

    1997-12-31

    The author explored the use of a novel class of boronated nucleic acids, the boranophosphates, as an alternative, but complementary method to dideoxysequencing. Boranophosphates can be used to directly amplify and sequence single- or double-stranded DNA. Fragments are derived not from truncations during polymerase synthesis, but from insertion and digestion back to a boronated marker or delimiter that was incorporated during exponential amplification. The method, which the author calls Boronated One-Step PCR Sequencing, is unique in that it employs a new class of {alpha}-P-boronated 2{prime}-deoxynucleoside 5{prime}-triphosphates first synthesized in the laboratory. These boronated triphosphates exhibit useful properties: (a) they are heat stable, (b) they can be base-specifically incorporated into DNA during the polymerase chain reaction, and (c) once incorporated, the boranophosphate nucleotide (marker) blocks the action of exonuclease. Thus, the positions of the stably-incorporated boronated markers can be revealed by a simple exonuclease digestion, producing a series of fragments--each of which is terminated base-specifically at the boronated markers--and thereby defining the sequence of the PCR product.

  17. Seed priming to alleviate salinity stress in germinating seeds.

    Science.gov (United States)

    Ibrahim, Ehab A

    2016-03-15

    Salinity is one of the major abiotic stresses that affect crop production in arid and semiarid areas. Seed germination and seedling growth are the stages most sensitive to salinity. Salt stress causes adverse physiological and biochemical changes in germinating seeds. It can affect the seed germination and stand establishment through osmotic stress, ion-specific effects and oxidative stress. The salinity delays or prevents the seed germination through various factors, such as a reduction in water availability, changes in the mobilization of stored reserves and affecting the structural organization of proteins. Various techniques can improve emergence and stand establishment under salt conditions. One of the most frequently utilized is seed priming. The process of seed priming involves prior exposure to an abiotic stress, making a seed more resistant to future exposure. Seed priming stimulates the pre-germination metabolic processes and makes the seed ready for radicle protrusion. It increases the antioxidant system activity and the repair of membranes. These changes promote seed vigor during germination and emergence under salinity stress. The aim of this paper is to review the recent literature on the response of plants to seed priming under salinity stress. The mechanism of the effect of salinity on seed germination is discussed and the seed priming process is summarized. Physiological, biochemical and molecular changes induced by priming that lead to seed enhancement are covered. Plants' responses to some priming agents under salinity stress are reported based on the best available data. For a great number of crops, little information exists and further research is needed. PMID:26812088

  18. Physiological and Biochemical Mechanisms of Seed Priming-Induced Chilling Tolerance in Rice Cultivars

    OpenAIRE

    Hussain, Saddam; Khan, Fahad; Hussain, Hafiz A.; Nie, Lixiao

    2016-01-01

    Rice belongs to tropical and subtropical environments and is extremely sensitive to chilling stress particularly during emergence and early stages of seedling development. Seed priming can be a good approach to enhance rice germination and stand establishment under chilling stress. The present study examined the role of different seed priming techniques viz., hydropriming, osmopriming, redox priming, chemical priming, and hormonal priming, in enhancing the chilling tolerance in rice. The most...

  19. Gender Differences in Responsiveness to a Homo Economicus Prime in the Gift-Exchange Game

    OpenAIRE

    Mertins, Vanessa; Warning, Susanne

    2013-01-01

    It has recently been claimed that women's social preferences are easier to manipulate than men's. We tested for gender differences in responsiveness to a homo economicus prime in a gift-exchange experiment with 113 participants. We observed gender differences in the direction of prime-to-behavior effects. For men, we found that primed participants behaved more selfishly than non-primed men as expected. However and surprisingly, for women we observed that participants primed toward selfishness...

  20. Priming children's and adults' analogical problem solutions with true and false memories

    OpenAIRE

    Howe, M. L.; Threadgold, E.; Norbury, J.; Garner, S. R.; Ball, L. J.

    2013-01-01

    We investigated priming of analogical problem solutions with true and false memories. Children and adults were asked to solve nine verbal proportional analogies, three of which had been primed by Deese–Roediger–McDermott (DRM) lists where the critical lure (and problem solution) was presented as the initial word in the list (true memory priming), three of which were primed by DRM lists whose critical lures were the solution to the verbal proportional analogies (false memory priming), and thre...

  1. Comparative analysis of conventional PCR and real-time PCR to diagnose shrimp WSD

    OpenAIRE

    Leal, C. A. G.; Carvalho-Castro, G.A.; Cottorello, A.C.; Leite, R. C.; Figueiredo, H. C. P.

    2013-01-01

    The aims of this study were to standard and optimize a qPCR protocol with FAM-BHQ1 probe, and to compare its sensitivity against TaqMan qPCR and PCR methods to diagnose shrimp WSD. The FAM-BHQ1 qPCR presented higher clinical sensitivity and showed to be a robust alternative to detect WSSV in clinical samples.

  2. Testing for Genetically Modified Foods Using PCR

    Science.gov (United States)

    Taylor, Ann; Sajan, Samin

    2005-01-01

    The polymerase chain reaction (PCR) is a Nobel Prize-winning technique that amplifies a specific segment of DNA and is commonly used to test for the presence of genetic modifications. Students use PCR to test corn meal and corn-muffin mixes for the presence of a promoter commonly used in genetically modified foods, the cauliflower mosaic virus 35S…

  3. PCR specific for Actinobacillus pleuropneumoniae serotype 3

    DEFF Research Database (Denmark)

    Zhou, L.; Jones, S.C.P.; Angen, Øystein;

    2008-01-01

    , but the method has liminations, for example, cross-reactions between serotypes 3, 6, and 8. This study describes the development of a serotype 3-specific PCR, based on the capsule locus, which can be used in a multiplex format with the organism's specific gene apxIV. The PCR test was evaluated on 266...

  4. Validation of RNAi by real time PCR

    DEFF Research Database (Denmark)

    Josefsen, Knud; Lee, Ying Chiu

    2011-01-01

    Real time PCR is the analytic tool of choice for quantification of gene expression, while RNAi is concerned with downregulation of gene expression. Together, they constitute a powerful approach in any loss of function studies of selective genes. We illustrate here the use of real time PCR to verify...

  5. Digital PCR for detection of citrus pathogens

    Science.gov (United States)

    Citrus trees are often infected with multiple pathogens of economic importance, especially those with insect or mite vectors. Real-time/quantitative PCR (qPCR) has been used for high-throughput detection and relative quantification of pathogens; however, target reference or standards are required. I...

  6. PRIMED: PRIMEr database for deleting and tagging all fission and budding yeast genes developed using the open-source genome retrieval script (GRS.

    Directory of Open Access Journals (Sweden)

    Michael T Cummings

    Full Text Available The fission (Schizosaccharomyces pombe and budding (Saccharomyces cerevisiae yeasts have served as excellent models for many seminal discoveries in eukaryotic biology. In these organisms, genes are deleted or tagged easily by transforming cells with PCR-generated DNA inserts, flanked by short (50-100 bp regions of gene homology. These PCR reactions use especially designed long primers, which, in addition to the priming sites, carry homology for gene targeting. Primer design follows a fixed method but is tedious and time-consuming especially when done for a large number of genes. To automate this process, we developed the Python-based Genome Retrieval Script (GRS, an easily customizable open-source script for genome analysis. Using GRS, we created PRIMED, the complete PRIMEr D atabase for deleting and C-terminal tagging genes in the main S. pombe and five of the most commonly used S. cerevisiae strains. Because of the importance of noncoding RNAs (ncRNAs in many biological processes, we also included the deletion primer set for these features in each genome. PRIMED are accurate and comprehensive and are provided as downloadable Excel files, removing the need for future primer design, especially for large-scale functional analyses. Furthermore, the open-source GRS can be used broadly to retrieve genome information from custom or other annotated genomes, thus providing a suitable platform for building other genomic tools by the yeast or other research communities.

  7. Comparison of Prime Movers Suitable for USMC Expeditionary Power Sources

    Energy Technology Data Exchange (ETDEWEB)

    Theiss, T.J.

    2000-04-18

    This report documents the results of the ORNL investigation into prime movers that would be desirable for the construction of a power system suitable for the United States Marine Corps (USMC) expeditionary forces under Operational Maneuvers From The Sea (OMFTS) doctrine. Discrete power levels of {approx}1, 5, 15, and 30 kW are considered. The only requirement is that the prime mover consumes diesel fuel. A brief description is given for the prime movers to describe their basic scientific foundations and relative advantages and disadvantages. A list of key attributes developed by ORNL has been weighted by the USMC to indicate the level of importance. A total of 14 different prime movers were scored by ORNL personnel in four size ranges (1,5, 15, & 30 kW) for their relative strength in each attribute area. The resulting weighted analysis was used to indicate which prime movers are likely to be suitable for USMC needs. No single engine or prime mover emerged as the clear-cut favorite but several engines scored as well or better than the diesel engine. At the higher load levels (15 & 30 kW), the results indicate that the open Brayton (gas turbine) is a relatively mature technology and likely a suitable choice to meet USMC needs. At the lower power levels, the situation is more difficult and the market alone is not likely to provide an optimum solution in the time frame desired (2010). Several prime movers should be considered for future developments and may be satisfactory; specifically, the Atkinson cycle, the open Brayton cycle (gas turbine), the 2-stroke diesel. The rotary diesel and the solid oxide fuel cell should be backup candidates. Of all these prime movers, the Atkinson cycle may well be the most suitable for this application but is an immature technology. Additional demonstrations of this engine will be conducted at ORNL. If this analysis is positive, then the performance of a generator set using this engine, the open Brayton and the 2-stroke diesel should

  8. Context-specific control and the Stroop negative priming effect.

    Science.gov (United States)

    Milliken, Bruce; Thomson, David R; Bleile, Karmen; MacLellan, Ellen; Giammarco, Maria

    2012-01-01

    The present study highlights the utility of context-specific learning for different probe types in accounting for the commonly observed dependence of negative priming on probe selection. Using a Stroop priming procedure, Experiments 1a and 1b offered a demonstration that Stroop priming effects can differ qualitatively for selection and no-selection probes when probe selection is manipulated between subjects, but not when it is manipulated randomly from trial to trial within subject (see also Moore, 1994). In Experiments 2 and 3, selection and no-selection probes served as two contexts that varied randomly from trial to trial, but for which proportion repeated was manipulated separately. A context-specific proportion repeated effect was observed in Experiment 2, characterized by modest quantitative shifts in the repetition effects as a function of the context-specific proportion repeated manipulation. However, with a longer intertrial interval in Experiment 3, a context-specific proportion repeated manipulation that focused on the no-selection probes changed the repetition effect qualitatively, from negative priming when the proportion repeated was .25 to positive priming when the proportion repeated was .75. The results are discussed with reference to the role of rapid, context-specific learning processes in the integration of prior experiences with current perception and action. PMID:22502818

  9. The effects of alcohol expectancy priming on group bonding.

    Science.gov (United States)

    Moltisanti, Allison J; Below, Maureen C; Brandon, Karen O; Goldman, Mark S

    2013-12-01

    According to alcohol expectancy theory, drinking-related information is stored in memory and, when cue activated, influences alcohol-related behavior. Priming of alcohol cues and expectancies has been shown to elicit both drinking and nonconsumptive behavior associated with alcohol consumption, such as willingness to meet with a stranger and aggression. These social influence effects have been shown to be moderated by individual differences in alcohol expectancies. In the present study, we tested whether an alcohol prime would facilitate social group bonding even in the absence of consumption, and whether such group bonding would be moderated by individually held social expectancies. One hundred twenty undergraduates (75% female) completed an alcohol expectancy measure prior to participation. Participants were primed with either alcohol or neutral beverage words and completed a collaborative group activity followed by questionnaires measuring perceived group cohesion. Several interactions were found between condition and expectancy reflecting that those in the alcohol prime condition with higher social alcohol expectancies reported greater cohesion on task-related, but not emotion-related, group measures. These findings underscore the complexity of the impact of expectancy and social behavior on drinking: the priming of alcohol expectancies may activate aspects of pro-social behavior, which may influence drinking, which in turn may feedback to positively reinforce social expectancies. PMID:24128149

  10. Effects of priming goal pursuit on implicit sequence learning

    Science.gov (United States)

    Gamble, Katherine R.; Lee, Joanna M.; Howard, James H.; Howard, Darlene V.

    2016-01-01

    Implicit learning, the type of learning that occurs without intent to learn or awareness of what has been learned, has been thought to be insensitive to the effects of priming, but recent studies suggest this is not the case. One study found that learning in the Serial Reaction Time (SRT) task was improved by nonconscious goal pursuit, primed via a word search task (Eitam et al., 2008). In two studies, we used the goal priming word search task from Eitam et al., but with a different version of the SRT, the Alternating Serial Reaction Time task (ASRT). Unlike the SRT, which often results in explicit knowledge and assesses sequence learning at one point in time, the ASRT has been shown to be implicit through sensitive measures of judgment, and it enables sequence learning to be measured continuously. In both studies, we found that implicit learning was superior in the groups that were primed for goal achievement compared to control groups, but the effect was transient. We discuss possible reasons for the observed time course of the positive effects of goal priming, as well as some future areas of investigation to better understand the mechanisms that underlie this effect, which could lead to methods to prolong the positive effects. PMID:25084974

  11. Lack of Noradrenergic Modulation of Indirect Semantic Priming

    Directory of Open Access Journals (Sweden)

    Jacquelyne S. Cios

    2009-01-01

    Full Text Available Norepinephrine and dopamine are both believed to affect signal-to-noise in the cerebral cortex. Dopaminergic agents appear to modulate semantic networks during indirect semantic priming, but do not appear to affect problem solving dependent on access to semantic networks. Noradrenergic agents, though, do affect semantic network dependent problem solving. We wished to examine whether noradrenergic agents affect indirect semantic priming. Subjects attended three sessions: one each after propranolol (40 mg (noradrenergic antagonist, ephedrine (25 mg (noradrenergic agonist, and placebo. During each session, closely related, distantly related, and unrelated pairs were presented. Reaction times for a lexical decision task on the target words (second word in the pair were recorded. No decrease in indirect semantic priming occurred with ephedrine. Furthermore, across all three drugs, a main effect of semantic relatedness was found, but no main effect of drug, and no drug/semantic relatedness interaction effect. These findings suggest that noradrenergic agents, with these drugs and at these doses, do not affect indirect semantic priming with the potency of dopaminergic drugs at the doses previously studied. In the context of this previous work, this suggests that more automatic processes such as priming and more controlled searches of the lexical and semantic networks such as problem solving may be mediated, at least in part, by distinct mechanisms with differing effects of pharmacological modulation.

  12. Conceptual priming for realistic auditory scenes and for auditory words.

    Science.gov (United States)

    Frey, Aline; Aramaki, Mitsuko; Besson, Mireille

    2014-02-01

    Two experiments were conducted using both behavioral and Event-Related brain Potentials methods to examine conceptual priming effects for realistic auditory scenes and for auditory words. Prime and target sounds were presented in four stimulus combinations: Sound-Sound, Word-Sound, Sound-Word and Word-Word. Within each combination, targets were conceptually related to the prime, unrelated or ambiguous. In Experiment 1, participants were asked to judge whether the primes and targets fit together (explicit task) and in Experiment 2 they had to decide whether the target was typical or ambiguous (implicit task). In both experiments and in the four stimulus combinations, reaction times and/or error rates were longer/higher and the N400 component was larger to ambiguous targets than to conceptually related targets, thereby pointing to a common conceptual system for processing auditory scenes and linguistic stimuli in both explicit and implicit tasks. However, fine-grained analyses also revealed some differences between experiments and conditions in scalp topography and duration of the priming effects possibly reflecting differences in the integration of perceptual and cognitive attributes of linguistic and nonlinguistic sounds. These results have clear implications for the building-up of virtual environments that need to convey meaning without words. PMID:24378910

  13. Assessment of the real-time PCR and different digital PCR platforms for DNA quantification.

    Science.gov (United States)

    Pavšič, Jernej; Žel, Jana; Milavec, Mojca

    2016-01-01

    Digital PCR (dPCR) is beginning to supersede real-time PCR (qPCR) for quantification of nucleic acids in many different applications. Several analytical properties of the two most commonly used dPCR platforms, namely the QX100 system (Bio-Rad) and the 12.765 array of the Biomark system (Fluidigm), have already been evaluated and compared with those of qPCR. However, to the best of our knowledge, direct comparison between the three of these platforms using the same DNA material has not been done, and the 37 K array on the Biomark system has also not been evaluated in terms of linearity, analytical sensitivity and limit of quantification. Here, a first assessment of qPCR, the QX100 system and both arrays of the Biomark system was performed with plasmid and genomic DNA from human cytomegalovirus. With use of PCR components that alter the efficiency of qPCR, each dPCR platform demonstrated consistent copy-number estimations, which indicates the high resilience of dPCR. Two approaches, one considering the total reaction volume and the other considering the effective reaction size, were used to assess linearity, analytical sensitivity and variability. When the total reaction volume was considered, the best performance was observed with qPCR, followed by the QX100 system and the Biomark system. In contrast, when the effective reaction size was considered, all three platforms showed almost equal limits of detection and variability. Although dPCR might not always be more appropriate than qPCR for quantification of low copy numbers, dPCR is a suitable method for robust and reproducible quantification of viral DNA, and a promising technology for the higher-order reference measurement method. PMID:26521179

  14. Seed Priming and Smoke Water Effects on Germination and Seed Vigor of Selected Low-Vigor Forage Legumes

    OpenAIRE

    Smith, Thomas M.

    2006-01-01

    A commercial solid matric priming method and an osmotic priming method were used to measure seed priming responses of birdsfoot trefoil, kura clover, and sericea lespedeza. Differences were not observed using standard germination tests, but both priming methods show potential for increased germination rate (P>0.05). Conflicting results for matric and osmotic priming were found in terms of seed storage potential after priming, with matric primed seeds showing higher (P

  15. Co-Prime Sampliers and Arrays Research Assignment

    Directory of Open Access Journals (Sweden)

    Mashhour Alqahtani

    2014-04-01

    Full Text Available There is a new technology to estimate the line spectra of multiple different processes as the sum of sinusoids buried in noise and DOA of narrow band signals to the array of antenna. In some technique we can construct a positive semi definite matrix. This paper will discuss the three journals done by Vaidyanathan, P.P. All the work is related to the digital signal processing. The three articles which have been evaluated in this paper are "Co prime sampling and the music algorithm,", "Sparse Sensing With Co-Prime Samplers and Arrays,” and "Theory of Sparse Co prime Sensing in Multiple Dimensions,". Overview of these articles have been provided along with the problem which has been addressed in the three articles as well as the solution which has been provided in the above given three journals.

  16. Material Biocompatibility for PCR Microfluidic Chips

    KAUST Repository

    Kodzius, Rimantas

    2010-04-23

    As part of the current miniaturization trend, biological reactions and processes are being adapted to microfluidics devices. PCR is the primary method employed in DNA amplification, its miniaturization is central to efforts to develop portable devices for diagnostics and testing purposes. A problem is the PCR-inhibitory effect due to interaction between PCR reagents and the surrounding environment, which effect is increased in high-surface-are-to-volume ration microfluidics. In this study, we evaluated the biocompatibility of various common materials employed in the fabrication of microfluidic chips, including silicon, several kinds of silicon oxide, glasses, plastics, wax, and adhesives. Two-temperature PCR was performed with these materials to determine their PCR-inhibitory effect. In most of the cases, addition of bovine serum albumin effectively improved the reaction yield. We also studied the individual PCR components from the standpoint of adsorption. Most of the materials did not inhibit the DNA, whereas they did show noticeable interaction with the DNA polymerase. Our test, instead of using microfluidic devices, can be easily conducted in common PCR tubes using a standard bench thermocycler. Our data supports an overview of the means by which the materials most bio-friendly to microfluidics can be selected.

  17. Seed priming improves salinity tolerance of wheat varieties

    International Nuclear Information System (INIS)

    To evaluate the response of wheat varieties to seed priming and salinity, an experiment was conducted in completely randomized design (CRD) with three replications at Institute of Biotechnology and Genetic Engineering (IBGE), KPK Agricultural University, Peshawar, Pakistan. The performance of 6 wheat varieties (Tatara-96, Ghaznavi-98, Fakhri Sarhad, Bakhtawar-92, Pirsabaq-2004 and Auqab-2000) at two seed conditions (primed with 30 mM NaCl and un primed) under four salinity levels (0, 40, 80 and 120 mM) was studied. Statistical analysis of the data revealed that salinity, seed priming and varieties had significantly (P= 0.05) affected shoot fresh weight plant/sup -1/ shoot dry weight plant/sup -1/, shoot Na/sup +/ contents (mg g/sup -1/ dry weight), shoot K/sup +/ contents (mg g/sup -1/ dry weight) and shoot K/sup +/Na/sup +/ ratio. Maximum shoot fresh weight plant/sup -1/ (7.71 g), shoot dry weight plant/sup -1/ (1.68 g), shoot K/sup +/ contents (1.39 mg g/sup -1/ dry weight) and shoot K/sup +/ Na/sup +/ratio (1.45) were recorded from Bakhtawar-92 as compared with other varieties. Highest shoot Na/sup +/ contents (1.43 mg g/sup -1/ dry weight) were recorded from Auqab-2000 when compared with other varieties. All parameters were enhanced with seed priming except shoot Na/sup +/ contents, which reduced significantly (p= 0.05) with seed priming. (author)

  18. Preparing to fight back: Generation and storage of priming compounds.

    Directory of Open Access Journals (Sweden)

    Victoria ePastor

    2014-06-01

    Full Text Available Immune-stimulated plants are able to respond more rapidly and adequately to various biotic stresses allowing them to efficiently combat an infection. During the priming phase, plant are stimulated in absence of a challenge, and can accumulate and store conjugates or precursors of molecules as well as other compounds that play a role in defense. These molecules can be released during the defensive phase following stress. These metabolites can also participate in the first stages of the stress perception. Here, we report the metabolic changes occuring in primed plants during the priming phase. β-aminobutyric acid (BABA causes a boost of the primary metabolism through the tricarboxylic acids (TCA such as citrate, fumarate, (S-malate and 2-oxoglutarate, and the potentiation of phenylpropanoid biosynthesis and the octodecanoic pathway. On the contrary, Pseudomonas syringae pv tomato (PstAvrRpt2 represses the same pathways. Both systems used to prime plants share some common signals like the changes in the synthesis of amino acids and the production of SA and its glycosides, as well as IAA. Interestingly, a product of the purine catabolism, xanthosine, was found to accumulate following both BABA- and PstAvrRpt2-treatement. The compounds that are strongly affected in this stage are called priming compounds, since their effect on the metabolism of the plant is to induce the production of primed compounds that will help to combat the stress. At the same time, additional identified metabolites suggest the possible defense pathways that plants are using to get ready for the battle.

  19. Priming-induced Changes in Permafrost Soil Organic Matter Decomposition

    Science.gov (United States)

    Pegoraro, E.; Schuur, E.; Bracho, R. G.

    2015-12-01

    Warming of tundra ecosystems due to climate change is predicted to thaw permafrost and increase plant biomass and litter input to soil. Additional input of easily decomposable carbon can alter microbial activity by providing a much needed energy source, thereby accelerating soil organic matter decomposition. This phenomenon, known as the priming effect, can increase CO2 flux from soil to the atmosphere. However, the extent to which this mechanism can decrease soil carbon stocks in the Arctic is unknown. This project assessed priming effects on permafrost soil collected from a moist acidic tundra site in Healy, Alaska. We hypothesized that priming would increase microbial activity by providing microbes with a fresh source of carbon, thereby increasing decomposition of old and slowly decomposing carbon. Soil from surface and deep layers were amended with multiple pulses of uniformly 13C labeled glucose and cellulose, and samples were incubated at 15° C to quantify whether labile substrate addition increased carbon mineralization. We quantified the proportion of old carbon mineralization by measuring 14CO2. Data shows that substrate addition resulted in higher respiration rates in amended soils; however, priming was only observed in deep layers, where 30% more soil-derived carbon was respired compared to control samples. This suggests that microbes in deep layers are limited in energy, and the addition of labile carbon increases native soil organic matter decomposition, especially in soil with greater fractions of slowly decomposing carbon. Priming in permafrost could exacerbate the effects of climate change by increasing mineralization rates of carbon accumulated over the long-term in deep layers. Therefore, quantifying priming effect in permafrost soils is imperative to understanding the dynamics of carbon turnover in a warmer world.

  20. Verbal priming and taste sensitivity make moral transgressions gross.

    Science.gov (United States)

    Herz, Rachel S

    2014-02-01

    The aims of the present study were to assess whether: (a) visceral and moral disgust share a common oral origin (taste); (b) moral transgressions that are also viscerally involving are evaluated accordingly as a function of individual differences in taste sensitivity; (c) verbal priming interacts with taste sensitivity to alter how disgust is experienced in moral transgressions; and (d) whether gender moderates these effects. Standard tests of disgust sensitivity, a questionnaire developed for this research assessing different types of moral transgressions (nonvisceral, implied-visceral, visceral) with the terms "angry" and "grossed-out," and a taste sensitivity test of 6-n-propylthiouracil (PROP) were administered to 102 participants. Results confirmed past findings that the more sensitive to PROP a participant was the more disgusted they were by visceral, but not moral, disgust elicitors. Importantly, the findings newly revealed that taste sensitivity had no bearing on evaluations of moral transgressions, regardless of their visceral nature, when "angry" was the emotion primed. However, when "grossed-out" was primed for evaluating moral violations, the more intense PROP tasted to a participant the more "grossed-out" they were by all transgressions. Women were generally more disgust sensitive and morally condemning than men, but disgust test, transgression type, and priming scale modulated these effects. The present findings support the proposition that moral and visceral disgust do not share a common oral origin, but show that linguistic priming can transform a moral transgression into a viscerally repulsive event and that susceptibility to this priming varies as a function of an individual's sensitivity to the origins of visceral disgust-bitter taste. PMID:24512062

  1. Attachment Security Balances Perspectives: Effects of Security Priming on Highly Optimistic and Pessimistic Explanatory Styles.

    Science.gov (United States)

    Deng, Yanhe; Yan, Mengge; Chen, Henry; Sun, Xin; Zhang, Peng; Zeng, Xianglong; Liu, Xiangping; Lye, Yue

    2016-01-01

    Highly optimistic explanatory style (HOES) and highly pessimistic explanatory style (HPES) are two maladaptive ways to explain the world and may have roots in attachment insecurity. The current study aims to explore the effects of security priming - activating supportive representations of attachment security - on ameliorating these maladaptive explanatory styles. 57 participants with HOES and 57 participants with HPES were randomized into security priming and control conditions. Their scores of overall optimistic attribution were measured before and after priming. Security priming had a moderating effect: the security primed HOES group exhibited lower optimistic attribution, while the security primed HPES group evinced higher scores of optimistic attribution. Furthermore, the security primed HOES group attributed positive outcomes more externally, while the security primed HPES group attributed successful results more internally. The results support the application of security priming interventions on maladaptive explanatory styles. Its potential mechanism and directions for future study are also discussed. PMID:27610092

  2. Transition probabilities in OH A 2 sigma + - X 2 pi i: Bands with v prime = 0 and 1, v double prime = 0 to 4

    Science.gov (United States)

    Copeland, Richard A.; Jeffries, Jay B.; Crosley, David R.

    1986-01-01

    Experimental results for relative vibrational band transition probabilities for v prime = 0 and 1, and v double prime = 0 to 4 in the A-X electronic system of OH are presented. The measurements, part of a larger set involving v prime = 0 to 4 and v double prime = 0 to 6, were made using spectrally dispersed laser-induced fluorescence (LIF) in the burnt gases of a flame. These Einstein coefficients will be useful in dynamics experiments for quantitative LIF determinations of OH radical concentrations in high v double prime.

  3. One-sided prime ideals in noncommutative algebra

    OpenAIRE

    Reyes, Manuel Lionel

    2010-01-01

    The goal of this dissertation is to provide noncommutative generalizations of the following theorems from commutative algebra: (Cohen's Theorem) every ideal of a commutative ring R is finitely generated if and only if every prime ideal of R is finitely generated, and (Kaplansky's Theorems) every ideal of R is principal if and only if every prime ideal of R is principal, if and only if R is noetherian and every maximal ideal of R is principal. We approach this problem by introducing certain fa...

  4. On the additive theory of prime numbers II

    OpenAIRE

    Cegielski, Patrick; Richard, Denis; Vsemirnov, Maxim

    2006-01-01

    The undecidability of the additive theory of primes (with identity) as well as the theory Th(N,+, n -> p\\_n), where p\\_n denotes the (n+1)-th prime, are open questions. As a possible approach, we extend the latter theory by adding some extra function. In this direction we show the undecidability of the existential part of the theory Th(N, +, n -> p\\_n, n -> r\\_n), where r\\_n is the remainder of p\\_n divided by n in the euclidian division.

  5. Galois towers over non-prime finite fields

    DEFF Research Database (Denmark)

    Bassa, Alp; Beelen, Peter; Garcia, Arnaldo;

    2014-01-01

    In this paper we construct Galois towers with good asymptotic properties over any non-prime finite field Fℓ; i.e., we construct sequences of function fields N=(N1⊂N2⊂⋯) over Fℓ of increasing genus, such that all the extensions Ni/N1 are Galois extensions and the number of rational places of these...... function fields grows linearly with the genus. The limits of the towers satisfy the same lower bounds as the best currently known lower bounds for the Ihara constant for non-prime finite fields. Towers with these properties are important for applications in various fields including coding theory and...

  6. Photoproduction of eta-prime-mesons from the Proton

    CERN Document Server

    Sibirtsev, A A; Krewald, S; Speth, J; Elster, Ch.

    2003-01-01

    The presently available data for the reaction ${\\gamma}p{\\to}\\eta^\\prime{p}$ are analyzed in terms of a model in which the dominant production mechanism is the exchange of the vector mesons $\\omega$ and $\\rho$. To describe the data at photon energies close to the production threshold we introduce a resonance contribution due to the well established $S_{11}(1535)$ resonance. Finally we study the contributions due to nucleon exchange to the $\\eta^\\prime$ photoproduction and find, that those contributions can be seen at large angles in the differential cross section.

  7. Prime Minister Badawi:A New Look for Malaysia

    Institute of Scientific and Technical Information of China (English)

    Zhang Xuegang

    2004-01-01

    @@ Prime Minster Abdullah Badawi has successfully presented a new look for his country since he took over from his much-respected predecessor former Prime Minister Mohamad Mahathir and won a landslide election victory last March. Domestically, he has improved the image of the ruling National Front coalition (Barisan Nasional) and his party the United Malay's National Organization (UMNO) by pressing ahead with drastic reforms including crackdown on corruption and social crime. Externally, he has adopted a flexible, pragmatic foreign policy, boosting ties with other Asean partners and China while mending fences with Western nations alienated over the past decade.

  8. PcrA function in plasmid replication

    OpenAIRE

    Chisty, L. T.

    2014-01-01

    PcrA is a DNA helicase involved in unwinding plasmi ds as a part of a complex in asymmetric rolling - circle replication of certain plasmids carrying antibiotic resistance genes. PcrA translocates on single stranded DNA by coupling ATP hydrolysis to movement on DNA. Initiator protein, RepD is required to nick supercoiled plasmid site - specifically and open an ssDNA stretch that PcrA can bind. The presence of RepD is needed throughout plasmid unwinding to maintain processivity. Using fluo...

  9. Long-range PCR in next-generation sequencing: comparison of six enzymes and evaluation on the MiSeq sequencer.

    Science.gov (United States)

    Jia, Haiying; Guo, Yunfei; Zhao, Weiwei; Wang, Kai

    2014-01-01

    Long-range PCR remains a flexible, fast, efficient and cost-effective choice for sequencing candidate genomic regions in a small number of samples, especially when combined with next-generation sequencing (NGS) platforms. Several long-range DNA polymerases are advertised as being able to amplify up to 15 kb or longer genomic DNA. However, their real-world performance characteristics and their suitability for NGS remain unclear. We evaluated six long-range DNA polymerases (Invitrogen SequalPrep, Invitrogen AccuPrime, TaKaRa PrimeSTAR GXL, TaKaRa LA Taq Hot Start, KAPA Long Range HotStart and QIAGEN LongRange PCR Polymerase) to amplify three amplicons, with sizes of 12.9 kb, 9.7 kb, and 5.8 kb, respectively. Subsequently, we used the PrimeSTAR enzyme to amplify entire BRCA1 (83.2 kb) and BRCA2 (84.2 kb) genes from nine subjects and sequenced them on an Illumina MiSeq sequencer. We found that the TaKaRa PrimeSTAR GXL DNA polymerase can amplify almost all amplicons with different sizes and Tm values under identical PCR conditions. Other enzymes require alteration of PCR conditions to obtain optimal performance. From the MiSeq run, we identified multiple intronic and exonic single-nucleotide variations (SNVs), including one mutation (c.5946delT in BRCA2) in a positive control. Our study provided useful results for sequencing research focused on large genomic regions. PMID:25034901

  10. Benefits of rice seed priming are offset permanently by prolonged storage and the storage conditions

    OpenAIRE

    Hussain, Saddam; Zheng, Manman; Khan, Fahad; Khaliq, Abdul; Fahad, Shah; Peng, Shaobing; Huang, Jianliang; Cui, Kehui; Nie, Lixiao

    2015-01-01

    Seed priming is a commercially successful practice, but reduced longevity of primed seeds during storage may limit its application. We established a series of experiments on rice to test: (1) whether prolonged storage of primed and non-primed rice seeds for 210 days at 25°C or −4°C would alter their viability, (2) how long primed rice seed would potentially remain viable at 25°C storage, and (3) whether or not post-storage treatments (re-priming or heating) would reinstate the viability of st...

  11. Real time PCR. Application in dengue studies

    Directory of Open Access Journals (Sweden)

    Jeanette Prada-Arismendy

    2011-06-01

    Full Text Available PCR (polymerase chain reaction is a routinely used tool in every diagnostic and research laboratory. This technique has been used in detection of mutations and pathogens, forensic investigation, and even is the base tool for human genome sequencing. A modification of PCR technique, real time PCR, allows the quantification of nucleic acids with higher sensibility, specificity and reproducibility. This article is intended to clarify the foundations of real-time PCR, using an application model for virology. In the actual work, it was quantified the viral load of dengue virus serotype 2 produced from infected murine macrophages; the obtained results in this work established that murine strain BALB/c presents a greater susceptibility to dengue virus infection, which establishes BALB/c murine strain as a best model of study for investigation of dengue virus infection physiopathology.

  12. Generalized two-point tree-level amplitude $jf \\to j^{\\, \\prime} f^{\\, \\prime}$ in a magnetized medium (extended version)

    CERN Document Server

    Kuznetsov, A V; Shlenev, D M

    2013-01-01

    The tree-level two-point amplitudes for the transitions $jf \\to j^{\\, \\prime} f^{\\, \\prime}$, where $f$ is a fermion and $j$ is a generalized current, in a constant uniform magnetic field of an arbitrary strength and in charged fermion plasma, for the $jf$ interaction vertices of the scalar, pseudoscalar, vector and axial-vector types have been investigated. The particular cases of a very strong magnetic field, and of the coherent scattering off the real fermions without change of their states (the "forward" scattering) have been analysed.

  13. Antecedent Priming at Trace Positions in Children's Sentence Processing

    Science.gov (United States)

    Roberts, Leah; Marinis, Theodore; Felser, Claudia; Clahsen, Harald

    2007-01-01

    The present study examines whether children reactivate a moved constituent at its gap position and how children's more limited working memory span affects the way they process filler-gap dependencies. 46 5-7 year-old children and 54 adult controls participated in a cross-modal picture priming experiment and underwent a standardized working memory…

  14. Neural mechanisms of uncon-scious visual motion priming

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The neural correlates of the motion priming were examined in normal young subjects using event-related brain potentials (ERPs) and functional magnetic resonance imaging (fMRI). Visual motion perception can be uncon-sciously biased in favor of a particular direction by a pre-ceding motion in that direction. Motion priming first in-volved an enhancement of ERP amplitude about 100 ms fol-lowing the onset of motion. The amplitudes of ERP compo-nents after 350 ms were also increased. The fMRI results suggest that the early-latency effect reflects modulation of neural responses in extrastriate cortex. Higher-level visual processing areas, including cortical regions MT/MST and the intraparietal cortices were also activated. The findings provide direct evidence that unconscious priming of motion perception is the result of interaction of direction-selective neural responses to motion stimuli. The results cannot be accounted for by refractoriness of neural responses, but in-stead support a theory of motion priming based on motion opponency, as proposed in computational models.

  15. Efficient Identification Using a Prime-Feature-Based Technique

    DEFF Research Database (Denmark)

    Hussain, Dil Muhammad Akbar; Haq, Shaiq A.; Valente, Andrea

    2011-01-01

    , which are called minutiae points. Designing a reliable automatic fingerprint matching algorithm for minimal platform is quite challenging. In real-time systems, efficiency of the matching algorithm is of utmost importance. To achieve this goal, a prime-feature-based indexing algorithm is proposed in...

  16. Affective priming during the processing of news articles

    NARCIS (Netherlands)

    S.E. Baumgartner; W. Wirth

    2012-01-01

    The present study investigates the role of affective priming during the processing of news articles. It is assumed that the valence of the affective response to a news article will influence the processing of subsequent news articles. More specifically, it is hypothesized that participants who read

  17. Can Intonational Phrase Structure Be Primed (Like Syntactic Structure)?

    Science.gov (United States)

    Tooley, Kristen M.; Konopka, Agnieszka E.; Watson, Duane G.

    2014-01-01

    In 3 experiments, we investigated whether intonational phrase structure can be primed. In all experiments, participants listened to sentences in which the presence and location of intonational phrase boundaries were manipulated such that the recording included either no intonational phrase boundaries, a boundary in a structurally dispreferred…

  18. 7 CFR 29.1166 - Primings (P Group).

    Science.gov (United States)

    2010-01-01

    ..., lean in oil. Uniformity, 70 percent; tolerance, 30 percent waste. P5G—Low Quality Green Primings... ripe, open leaf structure, thin, lean in oil, weak color intensity. Uniformity, 70 percent; injury... ripe, open leaf structure, thin, lean in oil, pale color intensity. Uniformity, 70 percent;...

  19. On Hopkins' Picard Group Pic_2 at the prime 3

    OpenAIRE

    Karamanov, Nasko

    2009-01-01

    In this paper we calculate the algebraic Hopkins' Picard group Pic_2^{alg} at the prime p=3, which is a subgroup of index 2 of the group of isomorphism classes of invertible K(2)-local spectra i.e. of the Hopkins' Picard group Pic_2.

  20. The Impact of Emotional Priming on MMPI-2 Scale Scores

    Science.gov (United States)

    Lee, Tayla T. C.; Forbey, Johnathan D.; Ritchey, Kristin A.

    2011-01-01

    The current study investigated potential emotional priming effects on Minnesota Multiphasic Personality Inventory-2 (MMPI-2) scale scores. Participants included 98 college students who completed a personal narrative intended to induce temporary mood states, the MMPI-2, and a mood rating inventory. Results of the mood manipulation indicated that…