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Sample records for chaetodipterus faber broussonet

  1. Revision of Parancylodiscoides Caballero y C. & Bravo-Hollis, 1961 (Monogenoidea: Dactylogyridae), with a redescription of P. longiphallus (MacCallum, 1915) from the Atlantic spadefish Chaetodipterus faber (Broussonet) (Acanthuroidei: Ephippidae) in the Gulf of Mexico.

    Science.gov (United States)

    Kritsky, Delane C

    2012-02-01

    The generic diagnosis of Parancylodiscoides Caballero y C. & Bravo-Hollis, 1961 (Monogenoidea: Dactylogyridae), with three valid species, was amended to include dactylogyrids having: a haptor with dorsal and ventral anchor/bar complexes, 14 hooks (seven pairs) and four reservoirs (two pairs); a dorsal bar with bifurcate ends; hooks with protruding, blunt and slightly depressed thumbs and undilated shanks; a dextroventral vaginal aperture leading to an elongate and oblique vaginal vestibule; a germarium dextral to the testis; a vas deferens looping the left intestinal caecum; a copulatory complex lacking an accessory piece; and two intestinal caeca lacking diverticula and united posterior to the gonads. Parancylodiscoides is most similar to Sundatrema Lim & Gibson, 2009, from which it differs only by the position of the vaginal aperture (sinistroventral in Sundatrema spp.) and by lacking a sucker-like genital pore. New information concerning the number and distribution of haptoral hooks, the relative positions of the gonads and the course of the vas deferens was provided for the type-species, P. chaetodipteri Caballero y C. & Bravo-Hollis, 1961. Parancylodiscoides longiphallus (MacCallum, 1915) Lim & Gibson, 2009 was redescribed based on specimens collected from the Atlantic spadefish Chaetodipterus faber from the Gulf of Mexico off Mississippi and Guaratuba Bay, Paraná, Brazil; its occurrence on the Atlantic spadefish from the Gulf of Mexico, Guaratuba Bay and off Puerto Rico represented new geographical records for this helminth. Parancylodiscoides caballerobravorum Cezar, Luque & Amato, 1999 was considered a junior subjective synonym of P. longiphallus. The monotypic Isohaliotrema Young, 1968 was placed in synonymy with Parancylodiscoides and its type-species, I. platacis Young, 1968, transferred to Parancylodiscoides as Parancylodiscoides platacis (Young, 1968) n. comb. PMID:22183919

  2. Comparative Allometric Growth of the Mimetic Ephippid Reef Fishes Chaetodipterus faber and Platax orbicularis

    OpenAIRE

    Barros, Breno; Sakai, Yoichi; Pereira, Pedro H. C.; Gasset, Eric; Buchet, Vincent; Maamaatuaiahutapu, Moana; Jonathan S Ready; Oliveira, Yrlan; Giarrizzo,Tommaso; Vallinoto, Marcelo

    2015-01-01

    Mimesis is a relatively widespread phenomenon among reef fish, but the ontogenetic processes relevant for mimetic associations in fish are still poorly understood. In the present study, the allometric growth of two allopatric leaf-mimetic species of ephippid fishes, Chaetodipterus faber from the Atlantic and Platax orbicularis from the Indo-Pacific, was analyzed using ten morphological variables. The development of fins was considered owing to the importance of these structures for mimetic be...

  3. Comparative Allometric Growth of the Mimetic Ephippid Reef Fishes Chaetodipterus faber and Platax orbicularis.

    Directory of Open Access Journals (Sweden)

    Breno Barros

    Full Text Available Mimesis is a relatively widespread phenomenon among reef fish, but the ontogenetic processes relevant for mimetic associations in fish are still poorly understood. In the present study, the allometric growth of two allopatric leaf-mimetic species of ephippid fishes, Chaetodipterus faber from the Atlantic and Platax orbicularis from the Indo-Pacific, was analyzed using ten morphological variables. The development of fins was considered owing to the importance of these structures for mimetic behaviors during early life stages. Despite the anatomical and behavioral similarities in both juvenile and adult stages, C. faber and P. orbicularis showed distinct patterns of growth. The overall shape of C. faber transforms from a rounded-shape in mimetic juveniles to a lengthened profile in adults, while in P. orbicularis, juveniles present an oblong profile including dorsal and anal fins, with relative fin size diminishing while the overall profile grows rounder in adults. Although the two species are closely-related, the present results suggest that growth patterns in C. faber and P. orbicularis are different, and are probably independent events in ephippids that have resulted from similar selective processes.

  4. Comparative Allometric Growth of the Mimetic Ephippid Reef Fishes Chaetodipterus faber and Platax orbicularis.

    Science.gov (United States)

    Barros, Breno; Sakai, Yoichi; Pereira, Pedro H C; Gasset, Eric; Buchet, Vincent; Maamaatuaiahutapu, Moana; Ready, Jonathan S; Oliveira, Yrlan; Giarrizzo, Tommaso; Vallinoto, Marcelo

    2015-01-01

    Mimesis is a relatively widespread phenomenon among reef fish, but the ontogenetic processes relevant for mimetic associations in fish are still poorly understood. In the present study, the allometric growth of two allopatric leaf-mimetic species of ephippid fishes, Chaetodipterus faber from the Atlantic and Platax orbicularis from the Indo-Pacific, was analyzed using ten morphological variables. The development of fins was considered owing to the importance of these structures for mimetic behaviors during early life stages. Despite the anatomical and behavioral similarities in both juvenile and adult stages, C. faber and P. orbicularis showed distinct patterns of growth. The overall shape of C. faber transforms from a rounded-shape in mimetic juveniles to a lengthened profile in adults, while in P. orbicularis, juveniles present an oblong profile including dorsal and anal fins, with relative fin size diminishing while the overall profile grows rounder in adults. Although the two species are closely-related, the present results suggest that growth patterns in C. faber and P. orbicularis are different, and are probably independent events in ephippids that have resulted from similar selective processes. PMID:26630347

  5. Faber-Krahn type inequality for unicyclic graphs

    CERN Document Server

    Zhang, Guang-Jun; Zhang, Xiao-Dong

    2012-01-01

    The Faber-Krahn inequality states that the ball has minimal first Dirichlet eigenvalue among all bounded domains with the fixed volume in $\\mathbb{R}^n$. In this paper, we investigate the similar inequality for unicyclic graphs. The results show that the Faber-Krahn type inequality also holds for unicyclic graphs with a given graphic unicyclic degree sequence with minor conditions.

  6. An iterative method for the solution of nonlinear systems using the Faber polynomials for annular sectors

    Energy Technology Data Exchange (ETDEWEB)

    Myers, N.J. [Univ. of Durham (United Kingdom)

    1994-12-31

    The author gives a hybrid method for the iterative solution of linear systems of equations Ax = b, where the matrix (A) is nonsingular, sparse and nonsymmetric. As in a method developed by Starke and Varga the method begins with a number of steps of the Arnoldi method to produce some information on the location of the spectrum of A. This method then switches to an iterative method based on the Faber polynomials for an annular sector placed around these eigenvalue estimates. The Faber polynomials for an annular sector are used because, firstly an annular sector can easily be placed around any eigenvalue estimates bounded away from zero, and secondly the Faber polynomials are known analytically for an annular sector. Finally the author gives three numerical examples, two of which allow comparison with Starke and Varga`s results. The third is an example of a matrix for which many iterative methods would fall, but this method converges.

  7. Cecilia Böhl de Faber entre los románticos

    Directory of Open Access Journals (Sweden)

    Arroyo Almaraz, Antonio

    2014-06-01

    Full Text Available Cecilia Böhl de Faber and Francisca Ruiz de Larrea were both involved in the publication of the story La madre o El combate de Trafalgar published in the illustrated magazine El Artista, a staunch defender of Romanticism. The story was written by Cecilia Böhl de Faber and sent to the magazine by Francisca Ruiz de Larrea, after she had translated it from French and slightly adapted it. This made Cecilia Böhl de Faber the only woman writer to have been published in the romantic magazine, where she advocated aesthetic principles that would later characterise her work.Cecilia Böhl de Faber y Francisca Ruiz de Larrea participan en la edición del cuento La madre o El combate de Trafalgar publicado en la revista ilustrada El Artista, de gran trascendencia en la defensa del Romanticismo. El relato fue escrito por la primera y enviado a la revista por la segunda, una vez que lo tradujo del francés modificando en parte el mismo. A partir de este hecho aparece Cecilia como la única escritora que publicó en la revista romántica defendiendo a su vez principios estéticos que veremos posteriormente en su obra.

  8. Faber-Jackson relation for dwarf E/S0 galaxies

    OpenAIRE

    Matkovic, A.; Guzmán, R.

    2007-01-01

    Presentamos observaciones espectroscópicas de 72 galaxias de tipo temprano en el núcleo de cúmulo de Coma. Nuestra muestra incluye 36 galaxias enanas (dE/dS0) para las cuales hemos medido la dispersión de velocidad e índices de fuerza de líneas. Confirmamos que la relación de Faber-Jackson se mantiene para las galaxias luminosas de tipo temprano. Sin embargo, galaxias de tipos más tempranos de luminosidad más baja siguen una relación diferente: L / 2. Mostramos que la rotación por...

  9. Nest site selection by Hypsiboas faber(Anura, Hylidae in Southern Brazil

    Directory of Open Access Journals (Sweden)

    André L. Luza

    2015-12-01

    Full Text Available ABSTRACT Male gladiator frogs of Hypsiboas Wagler, 1830 build nests on available substrate surrounding ponds and streams where female spawn eggs during the breeding period. Although gladiator frogs seem to show plasticity in the way they construct their nests, there is no study reporting if these species present preferences about microhabitat conditions for nest-building (mainly under subtropical climate. Predation pressure and environmental conditions have been considered major processes shaping the great diversity of reproductive strategies performed by amphibians, but microhabitat conditions should explain where to build a nest as well as how nest looks. This study aimed to test nest site selection for nest-building by Hypsiboas faber(Wied-Neuwied, 1821, determining which factors are related to nest site selection and nest features. The survey was conducted at margins of two permanent ponds in Southern Brazil. Habitat factors were evaluated in 18 plots with nest and 18 plots in the surrounding without nest (control, describing vegetation structure and heterogeneity, and substrate characteristics. Water temperature was measured inside the nest and in its adjacency. Nest features assessed were area, depth and temperature. Habitat characteristics differed between plots with and without nest. Microhabitat selected for nest-building was characterized by great vegetation cover and height, as well as shallower water and lower cover of organic matter in suspension than in plots without nest. Differences between temperature inside nest and in its adjacency were not observed. No relationship between nest features and habitat descriptors was evidenced. Results revealed that Hypsiboas faber does not build nests anywhere. Males seem to prefer more protected habitats, probably avoiding predation, invasion of conspecific males and inclement weather. Lack of differences between temperature inside- and outside-nest suggest that nest do not improve this

  10. Assessment of heavy metal content and DNA damage in Hypsiboas faber (anuran amphibian) in coal open-casting mine.

    Science.gov (United States)

    Zocche, Jairo José; Damiani, Adriani Paganini; Hainzenreder, Giana; Mendonça, Rodrigo Ávila; Peres, Poliana Bernardo; Santos, Carla Eliete Iochims Dos; Debastiani, Rafaela; Dias, Johnny Ferraz; Andrade, Vanessa Moraes de

    2013-07-01

    The aims of the study were to determine the heavy metal content in the tissues of Hypsiboas faber from a coal mining area and to compare the DNA damage in the blood cells of these animals with that of animals living in an unpolluted area. The heavy metal content was detected according to the technique of Particle-Induced X-ray Emission (PIXE) and the DNA damage was assessed by the Comet assay. Our results reveal that the specimens of H. faber collected from the coal mining area exhibited elements of order Fe>Cu>Al>Zn>Rb>Mn>Br, independently of the organ. The values of Comet assay parameters (DNA damage index and DNA damage frequency) were significantly higher in specimens collected from the coal mining area than in the reference animals. Our study concludes that the coal mining residues are genotoxic to amphibians and may have adverse effects on soil, water, vegetation and wild animals. PMID:23619523

  11. Faber-Schauder Wavelet Sparse Grid Approach for Option Pricing with Transactions Cost

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    Shu-Li Mei

    2014-01-01

    Full Text Available Transforming the nonlinear Black-Scholes equation into the diffusion PDE by introducing the log transform of S and (T−t→τ can provide the most stable platform within which option prices can be evaluated. The space jump that appeared in the transformation model is suitable to be solved by the sparse grid approach. An adaptive sparse approximation solution of the nonlinear second-order PDEs was constructed using Faber-Schauder wavelet function and the corresponding multiscale analysis theory. First, we construct the multiscale wavelet interpolation operator based on the definition of interpolation wavelet theory. The operator can be used to discretize the weak solution function of the nonlinear second-order PDEs. Second, using the couple technique of the variational iteration method (VIM and the precision integration method, the sparse approximation solution of the nonlinear partial differential equations can be obtained. The method is tested on three classical nonlinear option pricing models such as Leland model, Barles-Soner model, and risk adjusted pricing methodology. The solutions are compared with the finite difference method. The present results indicate that the method is competitive.

  12. The Faber-Jackson relation and Fundamental Plane from halo abundance matching

    CERN Document Server

    Desmond, Harry

    2016-01-01

    The Fundamental Plane (FP) describes the relation between stellar mass, size, and velocity dispersion of elliptical galaxies; the Faber-Jackson relation (FJR) is its projection onto {mass, velocity} space. In this work we redeploy and expand the framework of Desmond & Wechsler (2015) to ask whether abundance matching-based $\\Lambda$CDM models that have shown success in matching the spatial distribution of galaxies are also capable of explaining key properties of the FJR and FP, including their scatter. Within our framework, agreement with the normalisation of the FJR requires haloes to expand in response to disc formation. We find that the tilt of the FP may be explained by a combination of the observed non-homology in galaxy structure and the variation in mass-to-light ratio produced by abundance matching with a universal IMF, provided that the anisotropy of stellar motions is taken into account. However, the predicted scatter around the FP is considerably increased by situating galaxies in cosmologicall...

  13. Reflexões sobre a articulação entre o homo faber e o homo sapiens na enfermagem

    OpenAIRE

    Cecilia Nogueira Valenca; Raionara Cristina de Araujo Santos; Soraya Maria de Medeiros; Jacileide Guimaraes; Raimunda Medeiros Germano; Francisco Arnoldo Nunes de Miranda

    2013-01-01

    Estudo reflexivo com o objetivo de analisar a articulação entre o enfermeiro-docente (Homo sapiens) e o enfermeiro-assistencial (Homo faber) no ambiente hospitalar, à luz do pensamento gramsciano. Na Enfermagem, coexistem duas dimensões: a teórica, exemplificada na figura do enfermeiro docente com seus projetos de pesquisa e publicações científicas; e a dimensão prática, com a atuação técnico-assistencial. Evidencia-se o distanciamento do enfermeiro docente em relação aos cenários de prática ...

  14. Reflexões sobre a articulação entre o homo faber e o homo sapiens na enfermagem

    Directory of Open Access Journals (Sweden)

    Cecilia Nogueira Valenca

    2013-09-01

    Full Text Available Estudo reflexivo com o objetivo de analisar a articulação entre o enfermeiro-docente (Homo sapiens e o enfermeiro-assistencial (Homo faber no ambiente hospitalar, à luz do pensamento gramsciano. Na Enfermagem, coexistem duas dimensões: a teórica, exemplificada na figura do enfermeiro docente com seus projetos de pesquisa e publicações científicas; e a dimensão prática, com a atuação técnico-assistencial. Evidencia-se o distanciamento do enfermeiro docente em relação aos cenários de prática da graduação, assim como do enfermeiro assistencial, da pesquisa e da prática baseada em evidências científicas. Face ao dilema entre Homo faber e Homo sapiens na Enfermagem, emerge a importância de refletir sobre a dimensão ética subjacente às ações de ambos, centradas no ser humano. Este diálogo não pode ser ignorado, pois dele depende o desbravamento de novos horizontes e o crescimento da Enfermagem enquanto ciência e prática social.

  15. Heavy-metal content and oxidative damage in Hypsiboas faber: the impact of coal-mining pollutants on amphibians.

    Science.gov (United States)

    Zocche, Jairo José; da Silva, Luciano Acordi; Damiani, Adriani Paganini; Mendonça, Rodrigo Ávila; Peres, Poliana Bernardo; dos Santos, Carla Eliete Iochims; Debastiani, Rafaela; Dias, Johnny Ferraz; de Andrade, Vanessa Moraes; Pinho, Ricardo Aurino

    2014-01-01

    It has been identified worldwide that amphibians are experiencing massive population declines. This decrease could be further enhanced by the exposure of amphibians to pollutants, which would enhance reactive oxygen species production and cause subsequent alterations in oxidant defense levels. The present study was aimed at understanding the impact of mineral coal on amphibians. For this purpose, chemical elemental contents and oxidative stress indexes in Hypsiboas faber from coal-mining areas and in an unpolluted area in the Catarinense Coal Basin, Brazil, were assessed. The highest contents of sulfur, chlorine, iron, zinc, and bromine were registered in specimens from the coal-mining area, whereas the highest contents of potassium calcium, and silicon were registered in specimens from the control area. It was found that there was a significant increase (p < 0.05) in the activity of super oxide dismutase (SOD) and glutathione peroxidase (GPx) in the animals from the coal-mining area, whereas the level of catalase showed no differences between the animal groups. The levels of TBARS showed no differences between the tested groups. However, carbonylation decreased significantly (p < 0.05) in animals from the coal-mining area, and there was a significant increase (p < 0.05) in the formation of total thiols in animals from the coal-mining area. In conclusion, the antioxidant system of H. faber is sensitive to pollutants present in coal-mining wastes, and its SOD and GPx activity may be a potential biomarker for monitoring the level of contaminants in the environment. PMID:23974155

  16. Energy management: analysis of reducing energy consumption by sectors of the A.W. Faber-Castell S.A. company; Gerenciamento energetico: analise de reducao do consumo de energia eletrica de setores da empresa A.W. Faber-Castell S.A.

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Jesue Ferraz da [Faculdades Integradas de Sao Carlos (FADISC), SP (Brazil); Branco, Fabio Jose Ceron [Universidade de Sao Paulo (EESC/USP), Sao Carlos, SP (Brazil). Escola de Engenharia

    2009-07-01

    The energy consumption in the sectors that require a lot of input from the company A.W. Faber-Castell S.A. after the implementation of the program to reduce energy consumption by the Internal Committee for Energy Conservation was studied. This program aimed to reduce by 0.5% of electric power in the company.

  17. On the origin of the Fundamental Plane and Faber-Jackson relations: consequences for the star formation problem

    CERN Document Server

    D'Onofrio, Mauro; Chiosi, Cesare; Chiosi, Emanuela; Marziani, Paola

    2016-01-01

    We show that the origin of the Fundamental Plane (FP) relation for early-type galaxies (ETGs) can be traced back to the existence of two distinct virtual planes for each galaxy in the \\muerespace\\ space. The first virtual plane is the Virial Plane (VP) relating the total galaxy mass to the \\muerespace\\ variables, while the other plane (named here BB plane) comes from a relation $L=L'_0 \\sigma^{\\beta}$ with $\\beta=-2$ connecting the luminosity of galaxies with the velocity dispersion through a factor $L'_0$ which varies considerably from galaxy to galaxy. This relation permits to explain the downsizing phenomenon and the Zone of Exclusion (ZOE) visible in the $I_e-R_e$ plane. The intersection of the $L=L'_0 \\sigma^{-2}$ relations in the $L-\\sigma$ plane with the zero-point lines of the VP at each galaxy radius originate the observed $L=L_0 \\sigma^2$ Faber-Jackson relation, where $L_0$ is a constant nearly equal for all ETGs. We show that this relation is the translation of the stellar black body law of Stefan-...

  18. Relevância do marketing relacional no mercado escolar nacional de lápis de cor: o caso da marca Faber-Castell

    OpenAIRE

    Oliveira, Joaquim Jorge Paulino de

    2012-01-01

    Dissertação de mestrado em Marketing / JEL Classification System: M30 – General; M31 – Marketing Pretendeu realizar-se um estudo, tendo por base as marcas de lápis de cor do mercado nacional. Aspirava-se compreender o seu comportamento e perceber o que as levou a superar a Faber-Castell no ranking de vendas no mercado português. As marcas que se encontram nas três primeiras posições de vendas nacionais, Caran D’Ache, Staedtler e Giotto, além dos seus clientes tradicionais tais como arma...

  19. 光纤溶脂和透明质酸填充术在面部年轻化整形中的应用%Clinical application of faber de-fattingand and hyaluronic acid filling in facial rejuvenation design

    Institute of Scientific and Technical Information of China (English)

    尹敏; 吴姗姗; 麦跃; 刘翔

    2015-01-01

    目的:提出应用光纤溶脂技术联合透明质酸填充进行面部年轻化整形的新概念.方法:早期应用光纤溶脂技术溶解因老化引起的松弛下垂的脂肪团,后期应用透明质酸填充面部萎缩凹陷部位.结果:本组患者30例,术后回访4~6个月,面部衰老现象明显改善.结论:光纤溶脂联合透明质酸填充,创伤小、年轻化美容效果明显,可达面部精细化雕塑的目的.%Objective To propose a new concept of facial rejuvenation design in using faber de-fatting and hyaluronic acid filling technology. Methods We adopted faber de-fatting technology to conduct sagging cellulite in early,two weeks later,hyaluronic acid was filled in facial depression. Results 30 patients in this group with postoperative visit 4-6 months,the facial aging phenomenon was significantly improved. Conclusion Faber de-fatting combined with hyaluronic acid filling of trauma and effect was obvious,achieve facial fine sculpture.

  20. A Steep Slope and Small Scatter for the High-Mass End of the Faber-Jackson Relation at z~0.55

    CERN Document Server

    Montero-Dorta, Antonio D; Bolton, Adam S; Brownstein, Joel R; Weiner, Benjamin J

    2015-01-01

    We measure the intrinsic Faber-Jackson (F-J) relation between velocity dispersion $\\sigma$ and luminosity $L$ for massive, luminous red galaxies (LRGs) at redshift z~0.55. We achieve unprecedented precision by using a sample of 600,000 galaxies with spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) of the third Sloan Digital Sky Survey (SDSS-III). We deconvolve the effects of photometric errors, limited spectroscopic signal-to-noise ratio, and red--blue galaxy confusion using a novel hierarchical Bayesian formalism that is generally applicable to any combination of photometric and spectroscopic observables. For a F-J relation of the form $L \\propto \\sigma^{\\beta}$, we find $\\beta = 7.8 \\pm 1.1$ for $\\sigma$ corrected to the effective radius. We find a very small intrinsic scatter of $s = 0.047 \\pm 0.004$ in $\\log_{10} \\sigma$ at fixed $L$. Assuming plausible stellar population models, our measurements are consistent with no evolution in the parameters of the F-J relation over the range 0.5 < ...

  1. The universal Faber-Jackson relation

    NARCIS (Netherlands)

    Sanders, R. H.

    2010-01-01

    In the context of modified Newtonian dynamics, the Fundamental Plane, as the observational signature of the Newtonian virial theorem, is defined by high-surface-brightness objects that deviate from being purely isothermal: the line-of-sight velocity dispersion should slowly decline with radius as ob

  2. Diplectanocotyla Yamaguti, 1953 (Monogenea: Diplectanoidea) from Megalops cyprinoides (Broussonet) (Teleostei: Megalopidae) off Peninsular Malaysia.

    Science.gov (United States)

    Lim, L H S; Gibson, D I

    2007-06-01

    Two known and two new species of Diplectanocotyla Yamaguti, 1953 (D. gracilis Yamaguti, 1953, D. megalopis Rakotofiringa & Oliver, 1987, D. langkawiensis n. sp. and D. parva n. sp.) were collected from Megalops cyprinoides (Megalopidae) off Langkawi, Kedah and Matang, Perak, Peninsular Malaysia. All four species possess similar types of sclerotised male and female reproductive structures and similar soft anatomical features. The squamodisc sclerites of all four species have spine-like projections with varying degrees of visibility and shapes (sharp-pointed to triangular). In D. megalopis and D. langkawiensis n. sp. the spines are sharp-pointed and distinct on sclerites from rows 5-6 onwards. In D. gracilis and D. parva n. sp. the sclerite spines are triangular, lightly sclerotised and occur on almost all of the sclerites. D. parva n. sp. has comparatively the smallest set of anchors, bars, squamodiscs and squamodisc suckers. The anchors and bars of the other three species are almost similar in overall size, and the main distinguishing feature is the relative lengths of the inner and outer roots of the ventral anchors. In D. gracilis the outer root is very much smaller than the inner root and they are disposed almost at a right angle to each other. In D. megalopis the outer root is usually about half the length of the inner root and the roots are inclined at c.60 degrees to each other. In D. langkawiensis n. sp. the roots are inclined at c.40 degrees degrees and the outer root is of a similar length or only slightly shorter than the inner root. The openings of the two squamodisc suckers of all four Diplectanocotyla species are surrounded by tiny scale-like spines. Bifid tegumental spines are found in the posterior region of all four species, differing only in their extent: in D. parva n. sp. the tegumental spines are only distributed in the peduncular region and not beyond, whilst in the other three species the tegumental spines extend from the posterior level of the testis to the end of the peduncle. An amended diagnosis of Diplectanocotyla and a key to its species are appended. PMID:17143570

  3. Familia Faber: The Family as Maker of the Future.

    Science.gov (United States)

    Boulding, Elise

    1983-01-01

    Presented at the National Council on Family Relations Annual Meeting, October, 1981, Milwaukee, WI. The creative response of households to boom-town stress is examined, indicating a significant amount of household-initiated future-oriented community building takes place under stress of rapid growth. (Author/JAC)

  4. Catherine Merridale, Ivan's War, the Red Army 1939-1945, London: Faber and Faber, 2005, 396 pages.

    OpenAIRE

    Joris Van Bladel

    2006-01-01

    Catherine Merridale's first well reviewed and much appraised book “Night of Stone, Death and Memory in Russia” (Granta, 2000)  examined the culture of suffering in Russia during the Soviet period. One key chapter in this previous book detailed the ordeals undergone by the Russian Armed Forces and the people at large, during the Great Patriotic War. Five years later, the British historian brings her expertise to this topic in  Ivan's War.At first glance, the topic of suffering and endurance of...

  5. Catherine Merridale, Ivan's War, the Red Army 1939-1945, London: Faber and Faber, 2005, 396 pages.

    Directory of Open Access Journals (Sweden)

    Joris Van Bladel

    2006-11-01

    Full Text Available Catherine Merridale's first well reviewed and much appraised book “Night of Stone, Death and Memory in Russia” (Granta, 2000  examined the culture of suffering in Russia during the Soviet period. One key chapter in this previous book detailed the ordeals undergone by the Russian Armed Forces and the people at large, during the Great Patriotic War. Five years later, the British historian brings her expertise to this topic in  Ivan's War.At first glance, the topic of suffering and endurance of...

  6. 'Better off alone than in bad company': agonistic colour display in mimetic juveniles of two ephippid species.

    Science.gov (United States)

    Barros, B; Sakai, Y; Hashimoto, H; Gushima, K; Vallinoto, M

    2012-08-01

    Comparative field observations of agonistic interactions in juvenile leaf-mimicking Platax orbicularis and Chaetodipterus faber (Ephippidae) were conducted in coastal waters of the Pacific and Atlantic Oceans. Similar agonistic behaviour was observed in the two species, in which individuals stopped displaying their mimetic colouration during encounters with conspecifics, to display conspicuous colours, such as transverse stripes along the body. These events were observed occasionally, almost invariably in individuals of smaller body size. Larger-bodied individuals of both species spent less time in agonistic displays. The absolute size of the fish, however, did not appear to affect the outcome of the encounter, suggesting that dominance is a temporary condition, based on the relative size of the opponents during encounters. PMID:22880735

  7. Nest site selection by Hypsiboas faber(Anura, Hylidae) in Southern Brazil

    OpenAIRE

    André L. Luza; Eliane R. da Silva; Daniela M. Failace; Patrick Colombo

    2015-01-01

    ABSTRACT Male gladiator frogs of Hypsiboas Wagler, 1830 build nests on available substrate surrounding ponds and streams where female spawn eggs during the breeding period. Although gladiator frogs seem to show plasticity in the way they construct their nests, there is no study reporting if these species present preferences about microhabitat conditions for nest-building (mainly under subtropical climate). Predation pressure and environmental conditions have been considered major processes sh...

  8. Comparative visual ecophysiology of mid-Atlantic temperate reef fishes

    Directory of Open Access Journals (Sweden)

    Andrij Z. Horodysky

    2013-11-01

    The absolute light sensitivities, temporal properties, and spectral sensitivities of the visual systems of three mid-Atlantic temperate reef fishes (Atlantic spadefish [Ephippidae: Chaetodipterus faber], tautog [Labridae: Tautoga onitis], and black sea bass [Serranidae: Centropristis striata] were studied via electroretinography (ERG. Pelagic Atlantic spadefish exhibited higher temporal resolution but a narrower dynamic range than the two more demersal foragers. The higher luminous sensitivities of tautog and black sea bass were similar to other benthic and demersal coastal mid-Atlantic fishes. Flicker fusion frequency experiments revealed significant interspecific differences at maximum intensities that correlated with lifestyle and habitat. Spectral responses of the three species spanned 400–610 nm, with high likelihood of cone dichromacy providing the basis for color and contrast discrimination. Significant day-night differences in spectral responses were evident in spadefish and black sea bass but not tautog, a labrid with characteristic structure-associated nocturnal torpor. Atlantic spadefish responded to a wider range of wavelengths than did deeper-dwelling tautog or black sea bass. Collectively, these results suggest that temperate reef-associated fishes are well-adapted to their gradient of brighter to dimmer photoclimates, representative of their unique ecologies and life histories. Continuing anthropogenic degradation of water quality in coastal environments, at a pace faster than the evolution of visual systems, may however impede visual foraging and reproductive signaling in temperate reef fishes.

  9. Pengaruh Strategi Green Marketing Terhadap Keputusan Membeli Pensil Tulis Dan Pensil Warna Faber Castell Pada Masyarakat Medan

    OpenAIRE

    Hidayat, Toni

    2015-01-01

    The increase in global warming has caused green marketing to become the main issue in the business world. Green marketing has become the need for producers and consumers to create healthful environment. Green marketing is as type of marketing, where a company sells friendly-environmental products. In the concept of green marketing, a company has performed green marketing since the beginning of the processing of the product for the sake of its survival. The formula of the problem in the resear...

  10. Women, Animals and Meat : A Feminist-Vegetarian Critical Approach to Margaret Atwood's The Edible Woman and Michel Faber's Under the Skin

    OpenAIRE

    Drewett, Anne

    2016-01-01

    In this thesis, Margaret Atwood’s The Edible Woman and Michel Faber’s Under the Skin are analysed from the perspective of feminist-vegetarian critical theory. Both texts deal with the idea of feeling like or being meat, but approach this idea from different angles. In The Edible Woman, the connection to feeling like meat is metaphorical and rooted in gender relations, while in Under the Skin, it is literal, related to the idea of being animal. What becomes clear through an analysis of these t...

  11. Wahaha vs. Danone Dispute Leads to Reflections on China’s FDI Policies——A Special Interview with ZONG Qinghou and Emmanuel Faber

    Institute of Scientific and Technical Information of China (English)

    叶文添; 唐清建

    2007-01-01

    Background: In 1996, Wahaha, Danone and BNP (Hong Kong) jointly invested in and incorporated 5 companies to manufacture Wahaha brand products, including purified water and eight-treasure porridge. Wahaha holds 49% equity interests in these companies, while Danone later became the dominant shareholder with a 51% stake after acquiring shares held by BNP in the aftermath of the Asian financial crisis. Danone then proposed to transfer the Wahaha brand to a joint venture but did not succeed. Subsequently, a trademark usage contract was signed by both parties instead. In the ensuing years, the Wahaha Group established non-JV companies in west China, central China and the Three Gorges reservoir area. These companies had RMB 5.6 billion of total assets as of December 31st, 2006 and made a net income of RMB 1.04 billion in that year. On April 3rd, 2007, Danone intended to force a deal by which it could acquire 51% equity interests in those non-JV companies for a sum of RMB 4 billion. Wahaha Chairman Zong Qinghou later complained that he and Wahaha fell into a trap set up by Danone. Both parties have since engaged in a lengthy "war of words", thereby arousing a grand debate on China’s FDI policies.

  12. [Walter Leitsch. Sigismund III. von Polen und Jan Zamoysky : die Rolle Estlands in der Rivalität zwischen König und Hetman] / Martin Faber

    Index Scriptorium Estoniae

    Faber, Martin

    2009-01-01

    Arvustus: Leitsch, Walter. Sigismund III. von Polen und Jan Zamoysky : die Rolle Estlands in der Rivalität zwischen König und Hetman. Wien : Verlag der Österreichischen Akademie der Wissenschaften, 2006

  13. Miracle

    DEFF Research Database (Denmark)

    Petersen, Nils Holger

    2015-01-01

    A musical setting for tenor, violin and organ of Seamus Heaney's poem Miracle from the collection "Human Chain", published by Faber & Faber, London, 2010. The piece was written for and given its first performance at a concert in Trinitatis Church, Copenhagen on 12 March 2015 by Christian Damsgaar...

  14. Effects of Water Pollution in Koluama Area, Niger Delta Area, Nigeria Fish Species Composition, Histology, Shrimp Fishery and Fishing Gear Type

    OpenAIRE

    J.F.N. Abowei; E.N. Ogamba

    2013-01-01

    The effect of water pollution in Koluama Area in the Niger Delta region of Nigeria to determine its effects on fish species composition, histology, shrimp fishery and fishing gear type. A total of twenty (20) species belonging to eleven (11) families were recorded. Strongylura senegalensis, Lagocephalus laevigatus, Tarpon atlantica, Pristis pristis, Galeoides decadatylus and Butis koilomatodon were rare. Ephippion guttifer, Chaetodipterus goreensis, Sardinella maderensis, Sardinella aurita, L...

  15. Effects of remaining strong sprouts and controlling young seedling density on the growth of secondary faber oak forest%除萌留壮和幼林密度调控对白栎次生林生长的影响

    Institute of Scientific and Technical Information of China (English)

    张文武; 温佐吾; 袁廷汉

    2009-01-01

    通过对贵州省都匀市白栎次生林进行除萌留壮和幼林密度调控试验,结果表明,皆伐后每个树桩萌条的不同保留株数对白栎次生林的胸径、树高和单株材积生长均具有较为显著的影响,现有幼林每个树丛保留株数的不同对林分胸径和树高生长的影响不很显著,但对林分单株材积生长的影响较为显著.因此,在试验区经营白栎次生林,如培育大径级木材,除萌留壮处理以每个树桩保留1株粗壮萌条为宜,幼林密度调控以每个树丛保留1株粗壮幼树为宜.如培育薪炭林,不论是除萌留壮或幼林密度调控,每个树桩或树丛均以保留2~3株萌条或幼树为宜.

  16. The Influences of Metacognitive Awareness on Reading Comprehension in Iranian English Undergraduate students in Kerman, Iran

    OpenAIRE

    Leila Anjomshoaa; Samira Golestan; Ali Anjomshoaa

    2012-01-01

    Ashcroft, B., Griffiths, G. & Tiffin, H. (2002). The Empire Writes Back: Theory and Practice in Postcolonial Literature.2nd ed. London: Routeledge, 2002.Ashcroft, B., Griffiths, G. & Tiffin, H. (1995). The post-colonial studies reader. London: Routledge,. Bhabha. H. K. ( 1990). Nation and Narration. 1sted.London:Routledge.Beckett, S. (1990). The Complete Dramatic Works of Samuel Beckett. London: Faber Faber.Brandabur, C. (2006). "The Elephant in the Living-Room: A Postcolonial Reading...

  17. Correction and updating.

    Science.gov (United States)

    1994-03-01

    In the heading of David Cassidy's review of The Private Lives of Albert Einstein (18 February, p. 997) the price of the book as sold by its British publisher, Faber and Faber, was given incorrectly; the correct price is pound15.99. The book is also to be published in the United States by St. Martin's Press, New York, in April, at a price of $23.95. PMID:17817438

  18. The Constitution of Seamlessnessin Marilynne Robinson’s Housekeeping

    OpenAIRE

    Irfan, Lubna

    2010-01-01

    This essay investigates the phenomenon of seamlessness in Marilynne Robinson’s novel Housekeeping and seeks to show that seamlessness is decisive for shaping the prevailing atmosphere in the text and contributes to the sense of the power of the invisible that is central to the work. [1] Marilynne Robinson, Housekeeping (London: Faber & Faber, 2005; first published by Farrar, Straus & Giroux, 1980). In parenthetical documentation, hereafter abbreviated H.

  19. R2P, Humanitarian Intervention and Independence. The Proof of the Pudding Is in the Eating

    Directory of Open Access Journals (Sweden)

    Mient Jan Faber

    2012-02-01

    Full Text Available
    In this opinion article, Mient Jan Faber offers a unique insight on a series of recent conflicts. Faber’s first-hand experience of warzones, and personal engagement with many important actors, allows him to lend welcome colour to the debate on humanitarian intervention. He employs this wealth of experience to support his thesis that the ‘Responsibility to Protect’ doctrine has been hijacked, and is now a mere ‘Trojan Horse’ for military intervention for selfish reasons.

  20. Bibliographie sélective

    OpenAIRE

    2016-01-01

    Ouvrages sur la littérature et la culture irlandaises Deane S., Celtic Revivals : Essays in Modern Irish Literature 1880-1980, Londres, Boston, Faber and Faber, 1985. Deane S., Foreign Affections : Essays on Edmund Burke, Critical Conditions, Field Day Essays, Cork, Cork University Press in association with Field Day, 2005. Deane S., Strange Country : Modernity and Nationhood in Irish Writing Since 1790, Oxford, Clarendon Press, 1997. Deane S., The French Revolution and the Enlightenment in E...

  1. On the Non-Abelian Stokes Theorem

    OpenAIRE

    Diakonov, Dmitri; Petrov, Victor

    2000-01-01

    We present the non-Abelian Stokes theorem for the Wilson loop in various forms and discuss its meaning. Its validity has been recently questioned by Faber, Ivanov, Troitskaya and Zach. We demonstrate that all points of their criticism are based on mistakes in mathematics. Finally, we derive a variant of our formula for the Wilson loop in lattice regularization.

  2. Introduction

    DEFF Research Database (Denmark)

    Nielsen, Kirsten

    story about Esau and Jacob. The rest of the introduction presents the six (revised) papers from the conference that are published in this special issue. The authors of these papers are Marie Vejrup Nielsen, James H. Thrall, Alyda Faber, Hans Jørgen Frederiksen, Stefanie Knauss og Hugh S. Pyper ....

  3. Hämmastavad esikteosed / Aita Kivi

    Index Scriptorium Estoniae

    Kivi, Aita, 1954-

    2002-01-01

    Sisu : Andrew Miller. Salakaval valu; Helen Dewitt. Viimane samurai; Michel Faber. Naha all; Ana̐s Nin. Venuse delta; Eeva Park. Vaba langemine; Henri Troyat. Kohutavad keisrinnad; 11. september : terrorirünnaku tagamaad : / [koost. Stefan Aust, Cordt Schnibben... jt.]; Deepak Chopra. Täiuslik tervis; Charlie Jones. Elu on võrratu; Matt Ridley, Matt. Vooruse lätted

  4. The results of treatment of children with acute lymphoblastic leukemia and leukocyte count over 50 x 109/1 according to the modified New York protocol. Preliminary report of Polish Leukemia-Lymphoma Study Group

    International Nuclear Information System (INIS)

    92 children with acute lymphoblastic leukemia and leukocyte count over 50 x 109/1 were treated according to the modified New York protocol. The modifications were based on elements of Dana Faber protocol. The 4 year DFS was 66%. (author)

  5. The results of treatment of children with acute lymphoblastic leukemia and leukocyte count over 50 x 10{sup 9}/1 according to the modified New York protocol. Preliminary report of Polish Leukemia-Lymphoma Study Group; Wstepne wyniki leczenia zmodyfikowanym programem Nowy Jork dzieci chorych na ostra bialaczke limfoblastyczna z leukocytoza ponad 50x10{sup 9}/1. Doswiadczenia Polskiej Grupy Pediatrycznej ds Leczenia Bialaczki i Chloniakow

    Energy Technology Data Exchange (ETDEWEB)

    Armata, J. [Klinika Hematologii Dzieciecej, Akademia Medyczna, Cracow (Poland)] [and others

    1993-12-31

    92 children with acute lymphoblastic leukemia and leukocyte count over 50 x 10{sup 9}/1 were treated according to the modified New York protocol. The modifications were based on elements of Dana Faber protocol. The 4 year DFS was 66%. (author). 21 refs, 6 figs.

  6. Archäologischer Frühling. Aufnahmen historischer Baudenkmäler in Böhmen

    Czech Academy of Sciences Publication Activity Database

    Trnková, Petra

    Wien : Photoinstitut Bonartes, 2015 - (Faber, M.), s. 237-245 ISBN 978-3-902993-20-5 Institutional support: RVO:68378033 Keywords : Andreas Groll (1812-1872) * Bernhard Grueber * Johann Erasmus Wocel * photography * architecture * history * 19th century * Prague * Kutná Hora Subject RIV: AL - Art, Architecture, Cultural Heritage

  7. Visual Auto/biography, Hysteria, and the Pedagogical Performance of the "Real."

    Science.gov (United States)

    Hesford, Wendy S.

    2000-01-01

    Discusses Mindy Faber's autobiographical video as an allegory of contradictory interpretations of female hysteria as both a theater of femininity and feminist revolt. Provides an analysis of the resonance between student responses to "Delirium" (her auto/biographical video about her mother's long battle with mental illness) and contemporary…

  8. Hydrolysis of Nitriles to Carboxylic Acids

    Czech Academy of Sciences Publication Activity Database

    Martínková, Ludmila; Veselá, Alicja Barbara

    Stuttgart: Georg Thieme Verlag KG Stuttgart, 2015 - (Faber, K.; Fessner, W.; Turner, N.), s. 277-302. (Biocatalysis in Organic Synthesis 1). ISBN 978-3-13-174131-8 R&D Projects: GA ČR(CZ) GAP504/11/0394 Institutional support: RVO:61388971 Keywords : nitrilase * nitrile hydratase * amidase Subject RIV: CE - Biochemistry

  9. Cosmology and cluster halo scaling relations

    NARCIS (Netherlands)

    Araya-Melo, Pablo A.; van de Weygaert, Rien; Jones, Bernard J. T.

    2009-01-01

    We explore the effects of dark matter and dark energy on the dynamical scaling properties of galaxy clusters. We investigate the cluster Faber-Jackson (FJ), Kormendy and Fundamental Plane (FP) relations between the mass, radius and velocity dispersion of cluster-sized haloes in cosmological N-body s

  10. Effects of Chinese domestic polychlorinated biphenyls (PCBs) on gonadal differentiation in Xenopus laevis.

    OpenAIRE

    Qin, Zhan-Fen; Zhou, Jing-Ming; Chu, Shao-Gang; Xu, Xiao-Bai

    2003-01-01

    To determine whether polychlorinated biphenyls (PCBs) influence gonadal differentiation in Xenopus laevis, tadpoles were exposed to two Chinese domestic PCBs (PCB3 and PCB5 from Nieuwkoop and Faber stage 46/47 to complete metamorphosis. Gonads were characterized using a dissecting microscope. The control X. laevis had normal ovaries or testes in gross morphology, whereas obviously abnormal testes including ovotestes were found in PCB3- and PCB5-exposed groups. Ovotestes were characterized by ...

  11. The Photon-Baryon Governed Universe

    OpenAIRE

    Laszlo A. Marosi

    2012-01-01

    In a previous paper we postulated that the repulsive force responsible for the universal expansion is associated with the excitation of the empty space (quantum vacuum) and the excitation energy is represented by the energy of the cosmic microwave background (CMB). In this paper, we show that the concept of the repulsive space expanding photon field (i) can successfully be applied to explain the local velocity anomaly of the Milky Way Galaxy as shown by Faber and Burstein (1998) and Tully (19...

  12. Grasping metaphoric and metonymic processes in terminology

    OpenAIRE

    Prieto Juan Antonio; Ureña Gomez-Moreno, Jose Manuel; Tercedor Maribel

    2012-01-01

    Metaphor plays an important role in language creativity and knowledge representation in specialised domains, and its role has been studied by scholars in the field (e.g. Temmerman 2000; Faber and Márquez 2004; Tercedor Sánchez 2004; Ureña Gómez Moreno 2011; Vandaele and Lubin 2005). In contrast, metonymy has received little attention in terminology. In this paper, we describe salient features of metaphor and metonymy in specialised domains an...

  13. An Analysis Of Feminism In L. A. Meyer’ S Bloody Jack

    OpenAIRE

    Siregar, Rizki Arfah

    2010-01-01

    Skripsi ini mengetengahkan pembahasan dan analisa tentang Jacky Faber, seorang anak perempuan yang harus berjuang untuk mendapatkan hak-haknya pada novel karya L.A. Mayer, Bloody Jack. L.A. Mayer adalah salah satu dari pengarang terkenal pada abad ke-19. Karya-karnya banyak terinspirasi dari Istri tercinta Annetje Lawrence, yang menceritakan tentang kehidupan manusia, nilai-nilai moral dan satus sosial serta penuh petualangan dan intrik pada masa itu. Salah satunya adalah Bloody Jack, yang se...

  14. Enkele opmerkelijke waarnemingen en strandingen in 2004 en 2005

    OpenAIRE

    F. KERCKHOF; Haelters, J

    2005-01-01

    The article describes a number of observations, made in Belgian waters or on Belgian beaches during 2004 and 2005, of animals, which are considered rare or uncommon in the southern North Sea and Belgian waters in particular. The following species were encountered by fishermen, or by beachcombers: Scyliorhinus canicula, Argyrosomus regius, Hippocampus hippocampus, Blennius gattorugine, Spinachia spinachia, Crenilabrus melops, Crenilabrus bailloni, Salmo salar, Atherina presbyter, Zeus faber, B...

  15. Environmental ethics

    International Nuclear Information System (INIS)

    When the Homo Faber; to the beginning of the humanization, overcame the instinct that established a relationship balanced in the ecosphere between the animal and the nature, an interference it began in the relationship man-nature; since that was not adapted this but rather it began its transformation adapting the environment to its necessities. During miles of years the development of this production technique of the Homo Faber could be considered like a progressive and innocuous exploitation of the natural resources. At the present time, kind of a dialectical transformation of the quantity in a new quality characterizes the critical stadium of the new phase of the evolution inaugurated by the Homo Faber. We arrive this way today to that the production force, by means of the science and the technique, outlines us the problem of if for a bigger development in the productivity is necessary a progressive destruction of the ecosphere. That is to say, so that there is progress and will civilization be necessary a progressive interference of the natural balance, with the consequent setting in danger of the life? Moreover this article treats topics about their location and focuses, environmental ethics framed in the talkative ethics and virtues of the environmental ethics, among other topics

  16. A new monogenean genus from an ephippid fish off Peninsular Malaysia.

    Science.gov (United States)

    Lim, L H S; Gibson, David I

    2009-05-01

    Sundatrema langkawiense n. g., n. sp. (Monogenea: Ancyrocephalidae) is described from the gills of the orbfish Ephippus orbis (Bloch) (Ephippidae) off the Island of Langkawi, Malaysia, in the Andaman Sea. This new genus has the ancyrocephalid characteristics of four anchors, 14 marginal hooks and two bars, but differs from other four-anchored monogenean genera, and notably from Parancylodiscoides Caballero & Bravo Hollis, 1961 (found on the ephippids Chaetodipterus spp. off Central and South America), by having a unique combination of features. These include a muscular genital sucker and a vas deferens and vagina on the same (sinistral) side of the body. It is similar to Parancylodiscoides in having four haptoral reservoirs opening at the anchoral apertures, four anchors, similar connecting bars and small marginal hooks. The new species is characterised by the above generic features and by possessing a small, short copulatory organ lacking an accessory piece. Diplectanum longiphallus MacCallum, 1915 (previously attributed to Ancyrocephalus Creplin, 1839, Tetrancistrum Goto & Kikuchi, 1917 and Pseudohaliotrema Yamaguti, 1953) is transferred to Parancylodiscoides as P. longiphallus (MacCallum, 1915) n. comb. PMID:19337856

  17. Around a Sobolev-Orlicz inequality for operators of given spectral density

    CERN Document Server

    Rumin, Michel

    2009-01-01

    We prove some general Sobolev-Orlicz, Nash and Faber-Krahn inequalities for positive operators of given ultracontractive norms of the spectral projectors on ]0, lambda]. For invariant operators on coverings of finite simplicial complexes this "ultracontractive spectral decay" is equivalent to von-Neumann's spectral density function. This allows in the polynomial decay case to relate the Novikov-Shubin numbers of such coverings to Sobolev inequalities on exact $\\ell^2$-cochains, and to the vanishing of the torsion of the $\\ell^{p,2}$-cohomology for some $p \\geq 2$.

  18. Spectral density and Sobolev inequalities for pure and mixed states

    CERN Document Server

    Rumin, Michel

    2009-01-01

    We prove some general Sobolev-type and related inequalities for positive operators A of given ultracontractive spectral decay, without assuming e^{-tA} is submarkovian. These inequalities hold on functions, or pure states, as usual, but also on mixed states, or density operators in the quantum mechanical sense. This provides universal bounds of Faber-Krahn type on domains, that apply to their whole Dirichlet spectrum distribution, not only the first eigenvalue. Another application is given to relate the Novikov-Shubin numbers of coverings of finite simplicial complexes to the vanishing of the torsion of some l^{p,2}-cohomology.

  19. La duda cartesiana como síntoma de la modernidad según Hannah Arendt

    OpenAIRE

    Katiuska Reyes Galué

    2006-01-01

    Analizamos la duda cartesiana como elemento fundamental que describe desde el campo filosófico, la actitud humana en la modernidad, partiendo del criterio de Hannah Arendt. Nos explica Arendt, que fue simultáneo el crecimiento de la duda y de la ciencia, la introspección y la pérdida del sentido común, así como también la ineludible tendencia de la pérdida del sentido humano de la acción, sustituido por el ascenso del trabajo del homo faber y finalmente por la la...

  20. One of the two end-cap vacuum chambers for the CMS experiment has been completed.

    CERN Multimedia

    Maximilien Brice

    2005-01-01

    This 7.5-metre-long cone-shaped object is the fruit of many years' development and its machining and assembly were performed with the utmost precision. Part of the team involved in the design and production of the end-cap vacuum chamber for CMS, standing behind the completed segment. Picture 02 from left to right : Thierry Tardy (TS/MME), Luigi Leggiero (TS/MME), Patrick Lepeule (AT/VAC), Gérard Faber (ETH Zürich), Stefano Bongiovani (CINEL Project Manager), Giuseppe Foffano (TS/MME) and Marc Thiebert (TS/MME).

  1. What is the role of clinical tests and ultrasound in acetabular labral tear diagnostics?

    DEFF Research Database (Denmark)

    Troelsen, Anders; Mechlenburg, Inger; Gelineck, John;

    2009-01-01

    . PATIENTS AND METHODS: We examined 18 patients (18 hips, 2 men, median age 43 (32-56) years) with impingement test, FABER test, resisted straight leg raise test, ultrasound, and MR arthrography. They had had previous periacetabular osteotomies due to symptomatic, acetabular dysplasia. All hips showed no or...... only slight signs of osteoarthritis (Tönnis grade 0-1). RESULTS: MR arthrography identified labral tears in 17 of the 18 hips. Ultrasound had a sensitivity of 94%, a positive predictive value of 94%, and was false negative in only 1 case compared to MR arthrography. The impingement test had the best...

  2. Some observations on the first eigenvalue of the p-Laplacian and its connections with asymmetry

    Directory of Open Access Journals (Sweden)

    Tilak Bhattacharya

    2001-05-01

    Full Text Available In this work, we present a lower bound for the first eigenvalue of the p-Laplacian on bounded domains in $mathbb{R}^2$. Let $lambda_1$ be the first eigenvalue and $lambda_1^*$ be the first eigenvalue for the ball of the same volume. Then we show that $lambda_1gelambda_1^*(1+Calpha(Omega^{3}$, for some constant $C$, where $alpha$ is the asymmetry of the domain $Omega$. This provides a lower bound sharper than the bound in Faber-Krahn inequality.

  3. A Review of Annual Review of Astronomy and Astrophysics, Volume 52, 2014

    CERN Document Server

    Rao, A R

    2015-01-01

    A review of the Annual Review of Astronomy and Astrophysics Volume 52, 2014 (Ed. S.M. Faber, Ewine van Dishoeck, and John Kormendy) is given, with a perspective of understanding the current trends in Astronomy and Astrophysics. The impact of high volume data, high connectivity, and fast computations is clearly seen in the various research areas discussed in this volume. This has provided unprecedented development in the understanding of various astrophysical phenomena. At the same time, some negative trends like commodification of science, ignoring dissenting views are also evident.

  4. The Silicon Valley Astronomy Lectures: Ongoing Institutional Cooperation for Public Outreach

    Science.gov (United States)

    Fraknoi, A.

    2015-11-01

    For the last 15 years (with one year off for good behavior), four astronomical institutions in the San Francisco Bay Area have cooperated to produce a major evening public-lecture series on astronomy and space science topics. Co-sponsored by Foothill College's Astronomy Program, the Astronomical Society of the Pacific, the SETI Institute, and NASA Ames Research Center, the six annual Silicon Valley Astronomy Lectures have drawn audiences ranging from 450 to 950 people, and represent a significant opportunity to get information about modern astronomical research out to the public. Past speakers have included Nobel Laureate Arno Penzias, Vera Rubin, Frank Drake, Sandra Faber, and other distinguished scientists.

  5. Partial structure factors of liquid al80 (mnx(fecr) 1-x)20 alloys

    OpenAIRE

    Maret, M; A. Pasturel; Senillou, C.; Dubois, J. M.; Chieux, P.

    1989-01-01

    The structure of the liquid Al80(Mnx(FeCr)1-x )20 alloys has been studied using neutron diffraction and the substitution between Mn atoms and the σ-FeCr mixture. We have checked that this substitution is isomorphous by performing four measurements on different mixtures with x = 1, 0.639, 0.304 and 0. The Bhatia-Thornton as well as the Faber-Ziman partial structure factors have been determined and in particular, certain features in the SNN function and in the distribution of transition metal a...

  6. Arquitectura + juego : (los años pop 1956-1967)

    OpenAIRE

    Arcos Ettlin, Carlos César

    2015-01-01

    En 1938 surge en la escena académica un nuevo hombre –el homo ludens–, que llega de la mano del historiador Johan Huizinga. Ante el inminente aumento del tiempo libre, a partir de la disminución de la jornada de trabajo por una creciente automatización de la industria, el homo ludens viene a complementar el tiempo de trabajo ocupado desde la Revolución Industrial por el homo faber. La validez y fuerza de la propuesta de Huizinga está basada en el Juego como generador de cultura y desde allí e...

  7. Sarcoidosis and denim sandblasting: a case report

    OpenAIRE

    UZKESER, Hülya; KARATAY, Saliha; Yildirim, Kadir; Eren, Suat

    2013-01-01

    In this case report we present a rare case of sarcoidosis associated with denim sandblasting. A 33-year-old male patient was admitted to our clinic with pain in his shoulders, elbows, wrists, and hips, which had started 5 months earlier. His medical history showed that he had been working in denim sandblasting for the last 4 years. Sacroiliac compression and FABER tests were both positive. Laboratory analysis reported an erythrocyte sedimentation rate of 43 mm/h and serum C-reactive protein o...

  8. Generative semantic mechanisms within morphologically complex words

    Directory of Open Access Journals (Sweden)

    Eulalia Sosa Acevedo

    2012-07-01

    Full Text Available This paper seeks to introduce an alternative perspective on the treatment of derivation within a functional framework like Role and Reference Grammar (RRG. By taking a functional perspective, we assume that word formation is a two-dimensional phenomenon involving both onomasiological and grammatical components. Furthermore, grammatical processes are considered to be semantically motivated. In order to properly account for the internal mechanisms involved in word formation, we formulate affixal lexical representations by using Lexical Templates as devised within the LCM (see Mairal Usón & Faber 2007; Mairal Usón & Ruíz de Mendoza 2008a,b; Ruiz de Mendoza & Mairal Usón 2008; Butler 2009; Cortés Rodríguez 2009, among others.This paper seeks to introduce an alternative perspective on the treatment of derivation within a functional framework like Role and Reference Grammar (RRG. By taking a functional perspective, we assume that word formation is a two-dimensional phenomenon involving both onomasiological and grammatical components. Furthermore, grammatical processes are considered to be semantically motivated. In order to properly account for the internal mechanisms involved in word formation, we formulate affixal lexical representations by using Lexical Templates as devised within the LCM (see Mairal Usón & Faber 2007; Mairal Usón & Ruíz de Mendoza 2008a,b; Ruiz de Mendoza & Mairal Usón 2008; Butler 2009; Cortés Rodríguez 2009, among others.

  9. Scaling relations for galaxies of all types with CALIFA and MaNGA surveys.

    Science.gov (United States)

    Aquino-Ortíz, E.; Sánchez-Sánchez, S. F.; Valenzuela, O.; Cano-Díaz, M.; Hernández-Toledo, H.

    2016-06-01

    We used gas and stellar kinematics for the final Data Release of 667 spatially resolved galaxies publicly available from Calar Alto Legacy Integral Field Area survey (CALIFA) with the aim of study dynamical scaling relations as Tully & Fisher for rotation velocity, Faber & Jackson for velocity dispersion and also a combination of them through the S_{K} parameter defined as S_{K}^2 = KV_{rot}^2 + σ^2. We found a offset between gas and stellar kinematics in Tully & Fisher and Faber & Jackson relations, however when we used the S_{K} parameter all galaxies regardless of the morphological type lie in this M_{*} vs S_{k} scaling relation with a significant improvement compared with the M_{*} vs V_{rot} and M_{*} vs σ relations, in agreement with previous studies with SAMI survey, however the slope ant zero-point are different with them. We also explored different values of the K parameter, as well as different proxys to estimate V_{rot} in order to understand and characterize the physical source of scatter, slope and zero-point.

  10. Pharmaceutical Company Corruption and the Moral Crisis in Medicine.

    Science.gov (United States)

    Batt, Sharon

    2016-07-01

    A much-debated series of articles in the New England Journal of Medicine in May 2015 labeled the pharmaceutical industry's critics "pharmascolds." Having followed the debate for two decades, I count myself among the scolds. The weight of the evidence overwhelmingly supports the claim that pharmaceutical policy no longer serves the public interest; the central questions now are how this happened and what to do about it. I approached three of the most recent books on the industry with these questions in mind. Deadly Medicine and Organized Crime (CRC Press, 2013), by Peter Gøtzsche, Bad Pharma (Faber & Faber, 2013), by Ben Goldacre, and Good Pharma (Palgrave MacMillan, 2015), by Donald Light and Antonio Maturo, all situate their critical assessments in high-income countries globally, depicting the problem of pharmaceuticals as too many drugs approved with too little evidence, causing too many needless deaths, and prices spiraling to heights unimaginable just a decade ago. Light and Maturo, while no less critical of the status quo than Gøtzsche and Goldacre, take a different tack: they detail the success of an alternative model for pharmaceutical research, the Mario Negri Institute in Italy, citing it as proof positive that we can indeed defy capitalism's profit imperative. PMID:27417863

  11. Clues on galaxy and cluster formation from their scaling relations

    CERN Document Server

    Lanzoni, B; Cappi, A; Tormen, G; Zamorani, G

    2003-01-01

    By means of high-resolution N-body simulations in a LambdaCDM cosmology, we verify that scaling relations similar to those observed for nearby galaxy clusters are also defined by their dark matter hosts; the slopes, however, are not the same. We then show that the scaling relations of galaxy clusters can be explained as the result of the cosmological collapse of density fluctuations at the appropriate scales, plus a systematic trend of the M/L ratio with cluster mass. The empirical fact that the exponent of the Faber-Jackson relation of elliptical galaxies is significantly different (higher) than that of clusters, force us to conclude that the galaxy scaling laws might derive from the cosmological collapse of density fluctuations at the epoch when galactic scales became non-linear, plus modifications afterward due to early-time dissipative merging.

  12. Foliations on the moduli space of curves, vanishing in cohomology, and Calogero-Moser curves

    CERN Document Server

    Grushevsky, Samuel

    2011-01-01

    Using meromorphic differentials with real periods, we show that a certain tautological homology class on the moduli space of smooth algebraic curves of genus g vanishes. The vanishing of the entire tautological ring for degree g-1 and higher, part of Faber's conjecture, is known in both homology and Chow --- it was proven by Looijenga, Ionel, and Graber-Vakil, and the class that we show vanishes is just one such tautological class. However, our approach, motivated by the Whitham perturbation theory of soliton equations, is completely new, elementary in the sense that no techniques beyond elementary complex analysis are used, and also leads to a natural non-speciality conjecture, which would imply many more vanishing results and relations among tautological classes. In the course of the proof we define and study foliations of the moduli space of curves constructed using periods of meromorphic differentials, in a way providing for meromorphic differentials a theory similar to that developed for abelian differen...

  13. Conjugate gradient algorithms using multiple recursions

    Energy Technology Data Exchange (ETDEWEB)

    Barth, T.; Manteuffel, T.

    1996-12-31

    Much is already known about when a conjugate gradient method can be implemented with short recursions for the direction vectors. The work done in 1984 by Faber and Manteuffel gave necessary and sufficient conditions on the iteration matrix A, in order for a conjugate gradient method to be implemented with a single recursion of a certain form. However, this form does not take into account all possible recursions. This became evident when Jagels and Reichel used an algorithm of Gragg for unitary matrices to demonstrate that the class of matrices for which a practical conjugate gradient algorithm exists can be extended to include unitary and shifted unitary matrices. The implementation uses short double recursions for the direction vectors. This motivates the study of multiple recursion algorithms.

  14. Planetary Nebula Spectrograph survey of S0 galaxy kinematics. II. Clues to the origins of S0 galaxies

    CERN Document Server

    Cortesi, A; Coccato, L; Arnaboldi, M; Gerhard, O; Bamford, S; Napolitano, N R; Romanowsky, A J; Douglas, N G; Kuijken, K; Capaccioli, M; Freeman, K C; Saha, K; Chies-Santos, A L

    2013-01-01

    The stellar kinematics of the spheroids and discs of S0 galaxies contain clues to their formation histories. Unfortunately, it is difficult to disentangle the two components and to recover their stellar kinematics in the faint outer parts of the galaxies using conventional absorption line spectroscopy. This paper therefore presents the stellar kinematics of six S0 galaxies derived from observations of planetary nebulae (PNe), obtained using the Planetary Nebula Spectrograph. To separate the kinematics of the two components, we use a maximum-likelihood method that combines the discrete kinematic data with a photometric component decomposition. The results of this analysis reveal that: the discs of S0 galaxies are rotationally supported; however, the amount of random motion in these discs is systematically higher than in comparable spiral galaxies; and the S0s lie around one magnitude below the Tully--Fisher relation for spiral galaxies, while their spheroids lie nearly one magnitude above the Faber--Jackson re...

  15. Analytic derivation of gluons and monopoles from SU(2) lattice Yang-Mills theory. III. Plaquette representation

    CERN Document Server

    Conrady, F

    2006-01-01

    In this series of three papers, we generalize the derivation of photons and monopoles by Polyakov and Banks, Myerson and Kogut, to obtain gluon-monpole representations of SU(2) lattice gauge theory. Our approach is based on weak-coupling expansions. In this third article, we start from the plaquette representation of 3-dimensional SU(2) lattice gauge theory. By extending a work of Borisenko, Voloshin and Faber, we transform the expectation value of a Wilson loop into a path integral over a gluon field and monopole variables. The action contains the tree-level Coulomb interaction and a nonlinear coupling between gluons, monopoles and current. By making an additional assumption on the monopole self-energy, we can generalize Polyakov's derivation of confinement to gauge group SU(2) in 3 dimensions.

  16. Notes on entanglement entropy for excites holographic states in 2d

    CERN Document Server

    Rashkov, Radoslav C

    2016-01-01

    In this work we revisit the problem of contributions of excited holographic states to the entanglement entropy in two-dimensional conformal field theories. Using the results of replica trick method we find three expressions for these contributions. First, we express the contribution of the excited states in terms of Aharonov invariants. It is shown that beside the Schwarzian, the one-point functions of descendants of energy-momentum also contribute. Given Schwarz-Christoffel map, the contributions to any order can be easily computed. The second expression relates the entanglement entropy of excited states to Faber polynomials and Grunsky coefficients. Based on the relation of Grunsky coefficiens to tau-funcion of dispersionless Toda hierarchy, we find the third expression for contributions of excited holographic states to the entanglement entropy.

  17. GRAPE-SPH Chemodynamical Simulation of Elliptical Galaxies II: Scaling Relations and the Fundamental Plane

    CERN Document Server

    Kobayashi, C

    2005-01-01

    We simulate the formation and chemodynamical evolution of 128 elliptical galaxies using a GRAPE-SPH code that includes various physical processes that are associated with the formation of stellar systems: radiative cooling, star formation, feedback from Type II and Ia supernovae and stellar winds, and chemical enrichment. We find that the star formation timescale controls when and where stars form in the contracting gas cloud, determines the effective radius at given mass, and is constrained by observation to be ten times longer than the local dynamical timescale. We succeed in reproducing the observed global scaling relations under our CDM-based scenario, e.g., the Faber-Jackson relation, the Kormendy relation, and the fundamental plane. An intrinsic scatter exists along the fundamental plane, and the origin of this scatter lies in differences in merging history. Galaxies that undergo major merger events tend to have larger effective radii and fainter surface brightnesses, which result in larger masses, smal...

  18. Appendix: proof of the Uniformity Conjecture

    CERN Document Server

    Baldassarri, Francesco

    2011-01-01

    This paper originated as an appendix to the paper "Topology and Geometry of the Berkovich Ramification Locus for Rational Functions, II" by Xander Faber arXiv:1104.0943v2 [math.NT]. It may however be read independently. We prove a variant of the p-adic Rolle theorem, via the theory of the radius of convergence of p-adic connections and the theory of semistable reduction of p-adic curves. We carefully compare the present author's notion [Inv. Math. 182 (2010)] of radius of convergence, of a connection on a p-adic curve X, normalized by the choice of a semistable model of X, with Kedlaya's intrinsic generic radius of convergence of a differential module [Def. 9.4.7 in p-adic Differential Equations, Cambridge Studies in Adv. Math., vol. 125 (2010)].

  19. Measuring the dark matter equation of state

    CERN Document Server

    Serra, Ana Laura

    2011-01-01

    The nature of the dominant component of galaxies and clusters remains unknown. While the astrophysics comunity supports the cold dark matter (CDM) paradigm as a clue factor in the current cosmological model, no direct CDM detections have been performed. Faber and Visser 2006 have suggested a simple method for measuring the dark matter equation of state. By combining kinematical and gravitational lensing data it is possible to test the widely adopted assumption of pressureless dark matter. According to this formalism, we have measured the dark matter equation of state for first time using improved techniques. We have found that the value of the equation of state parameter is consistent with pressureless dark matter within the errors. Nevertheless the measured value is lower than expected. This fact follows from the well known differences between the masses determinated by lensing and kinematical methods. We have tested our techniques using simulations and we have also analyzed possible sources of errors that c...

  20. An experimentally consistent atomistic structural model of silica glass

    International Nuclear Information System (INIS)

    Empirical potential structure refinement is used to build an atomistic model of silica glass based on neutron scattering data. This model is tested against X-ray diffraction and extended X-ray absorption fine structure (EXAFS) spectroscopy data to establish its local and intermediate range structural veracity. The chemical specificity of the silicon and oxygen K-edge spectroscopic information allows us to confirm that the neutron scattering derived model represents a reasonable representation of the three partial structure factors that are required to characterise this binary glass and subsequently give confidence in the Faber-Ziman and Bhatia-Thornton partial structure factors and pair distribution functions that are extracted from the model

  1. PRODUCTION PROCESSES OF WASTE COMPOST AND ITS QUALITY AS ORGANIC FERTILIZER = PROCESSOS DE PRODUÇÃO DE COMPOSTOS DE LIXO E A SUA QUALIDADE COMO FERTILIZANTE ORGÂNICO

    Directory of Open Access Journals (Sweden)

    Soraya Despina Santos Voigtel

    2005-01-01

    Full Text Available The composting of organic waste may present real profits to the society and benefits for the solid residue public management in the city when it is correctly processed. The FABER-AMBRA system for domestic solid residue pre-treatment and DANO system for organic residue composting were compared based on organic composition quality generated for agricultural use. The DANO system is used at São José dos Campos and São Paulo City (Vila Leopoldina. The system uses rotating cylinder to accelerate the initial tax of compost. The material inside of the bioestabilizators for three days with rotating cylinder speed bigger than 1,5 rpm. The resultant product is called pre-compost and it does not have enough quality for agricultural use due to its maturation and pathogenic load. Therefore, it is necessaryto keep the composting material outside in piles to reach an acceptable maturation level. The System DANO implemented in Vila Leopoldina unit was modified by increasing the rotating cylinder speed or decreasing the period of permanence of the organic material in the bioestabilizadors. Results shows that more time in the storageyard for maturation was necessary. The bioestabilizado material produced by the FABER-AMBRA® system implemented at São Sebastião city takes six to nine months of maturation. The compost has the characteristics of maturity necessary to reduce volume and the organic load increasing the useful life of landfills. However, itcontains high concentration of heavy metal to be used as organic fertilizer. = A compostagem do lixo orgânico realizado de maneira correta apresenta ganhos reais à sociedade e benefícios incontestáveis para o gerenciamento público de resíduos sólidos no município. Os sistemas FABER-AMBRA® de pré-tratamento de resíduos sólidos domiciliares e DANO de compostagem de resíduo orgânico foramcomparados, em termos de qualidade dos compostos orgânicos gerados para uso na agricultura. O sistema DANO utiliza

  2. Mass Models and Environment of the New Quadruply Lensed Quasar SDSS J1330+1810

    Energy Technology Data Exchange (ETDEWEB)

    Oguri, Masamune; Inada, Naohisa; Blackburne, Jeffrey A.; Shin, Min-Su; Kayo, Issha; Strauss, Michael A.; Schneider, Donald P.; York, Donald G.

    2008-09-09

    We present the discovery of a new quadruply lensed quasar. The lens system, SDSS J1330+1810 at z{sub s} = 1.393, was identified as a lens candidate from the spectroscopic sample of the Sloan Digital Sky Survey. Optical and near-infrared images clearly show four quasar images with a maximum image separation of 1.76 inch, as well as a bright lensing galaxy. We measure a redshift of the lensing galaxy of z{sub 1} = 0.373 from absorption features in the spectrum. We find a foreground group of galaxies at z = 0.31 centred {approx} 120 inch southwest of the lens system. Simple mass models fit the data quite well, including the flux ratios between images, although the lens galaxy appears to be {approx} 1 mag brighter than expected by the Faber-Jackson relation. Our mass modeling suggests that shear from nearby structure is affecting the lens potential.

  3. Dark matter or the other dynamics

    Directory of Open Access Journals (Sweden)

    Y. Sobouti

    2005-09-01

    Full Text Available   Allowing the energy of a gravitational field to serve partially as its own source allows gravitating bodies to exhibit stronger fields, as if they were more massive. Depending on degree of compaction of the body, the field could be one to five times larger than the Newtonian field. This is a comfortable range of increase in field strength and may prove to be of convenience in the study of velocity curves of spirals, of velocity dispersions in clusters of galaxies and in interpreting the Tully-Fisher or Faber-Jackson relations in galaxies or systems of galaxies. The revised gravitation admits of superposition principle but only approximately in systems whose components are widely separated. The revised dynamics admits of the equivalence principle in that, the effective force acting on a test particle is derived from a potential, and could be elimhnated in a freely falling frame of reference.

  4. Automatic Detection of Frontal Face Midline by Chain-coded Merlin-Farber Hough Trasform

    Science.gov (United States)

    Okamoto, Daichi; Ohyama, Wataru; Wakabayashi, Tetsushi; Kimura, Fumitaka

    We propose a novel approach for detection of the facial midline (facial symmetry axis) from a frontal face image. The facial midline has several applications, for instance reducing computational cost required for facial feature extraction (FFE) and postoperative assessment for cosmetic or dental surgery. The proposed method detects the facial midline of a frontal face from an edge image as the symmetry axis using the Merlin-Faber Hough transformation. And a new performance improvement scheme for midline detection by MFHT is present. The main concept of the proposed scheme is suppression of redundant vote on the Hough parameter space by introducing chain code representation for the binary edge image. Experimental results on the image dataset containing 2409 images from FERET database indicate that the proposed algorithm can improve the accuracy of midline detection from 89.9% to 95.1 % for face images with different scales and rotation.

  5. A New Approach of Crypto-compression on MPEG Format

    Directory of Open Access Journals (Sweden)

    Y. Benlcouiri

    2014-05-01

    Full Text Available Issues of security and compression of transmitted data have become an important concern in multimedia technology. In this study, we propose an efficient approach to secure video sequences in real time using the method of choosing reference images that is based on the Faber-schauder Multi-scale Transform to reduce the data flow. The encryption step is based on the principle of affine encryption to achieve transposition and to perform some manipulations such as puzzle to reduce the amount of bits to be processed on the image. Testing this approach on video sequences revealed an improvement in data flow and provides a stronger security and a good encryption time.

  6. CGCG 480-022: A distant lonesome merger?

    CERN Document Server

    Carretero, C; Gonzalez-Garcia, C; Beckman, J E; Quilis, V

    2006-01-01

    We present a complete analysis, which includes morphology, kinematics, stellar populations and N-body simulations of CGCG 480-022, the most distant (cz=14317 km/s) isolated galaxy studied so far in such detail. The results all support the hypothesis that this galaxy has suffered a major merger event with a companion of ~0.1 times its mass. Morphology reveals the presence of a circumnuclear ring and possibly further ring debris. The radial velocity curve looks symmetrical, whilst the velocity dispersion increases with radius reaching values that do not correspond to a virialized system. Moreover, this galaxy deviates significantly from the Fundamental Plane and the Faber-Jackson relation. The stellar population analysis show that the ring is younger and more metal-rich, which suggest that it has undergone a fairly recent burst of star formation. Both morphological and dynamical results are in broad agreeement with our N-body simulations.

  7. The Eddington Limit in Cosmic Rays: An Explanation for the Observed Faintness of Starbursting Galaxies

    CERN Document Server

    Socrates, A; Ramirez-Ruiz, E; Socrates, Aristotle; Davis, Shane W.; Ramirez-Ruiz, Enrico

    2006-01-01

    We show that the luminosity of a star forming galaxy is capped by the production and subsequent expulsion of cosmic rays from its interstellar medium. By defining an Eddington luminosity in cosmic rays, we show that the star formation rate of a given galaxy is limited by its mass content and the cosmic ray mean free path. When the cosmic ray luminosity and pressure reaches a critical value as a result of vigorous star formation, hydrostatic balance is lost, a cosmic ray-driven wind develops, and star formation is choked off. Cosmic ray pressure-driven winds are likely to produce wind velocities significantly in excess of the galactic escape velocity. It is possible that cosmic ray feedback results in the Faber-Jackson relation for a plausible set of input parameters that describe cosmic ray production and transport, which are calibrated by observations of the Milky Way's interstellar cosmic rays.

  8. Repliek

    Directory of Open Access Journals (Sweden)

    J. Meihuizen

    2004-01-01

    Full Text Available In response to Klemann and FaberThe investigation and prosecution of economic collaborators in the Netherlands was arbitrary; there were no clear-cut guidelines. Some cases were prosecuted while other similar cases were dismissed. The distribution of cases among the special courts, tribunals and investigative committees was also arbitrary. Compared to their political and military counterparts, economic collaborators were given milder sentences, and collaborators in the civil services were seldom, or hardly, punished at all. In this sense, there was inequality before the law. A similar inequality existed, moreover, with respect to the economic collaborators themselves; petty economic collaborators were generally arrested, whereas the ‘big shots’ were rarely detained. The recovery of the Dutch social structure, and particularly the interests of post-war economic reconstruction largely determined the proceedings. Klemann’s arguments are riddled with highly moral judgements. This is remarkable, since he criticises me for employing such judgements, which in his view should have no place in an historical work. Although I have consistently sought to avoid moral judgements, Klemann obviously confuses the judgements of officials of the special administration of criminal justice with mine. It is true that I have repeatedly reproduced these in the book, without intending to present them as my own. In his contribution Faber stresses, in my view correctly, that precise information about the number of dossiers in the Centraal Archief Bijzondere Rechtspleging (CABR is missing. For future research, clear answers are indeed needed to answer the question on how many dossiers and suspects we are dealing with here. It is clearly in society’s best interest for more work to be carried out at the CABR and for the data that is found there to be stored in a database. The authorities should accept their responsibility in this matter and be prepared to fund the

  9. VizieR Online Data Catalog: Mark III Catalog of Galaxy Peculiar Velocities (Willick+ 1997)

    Science.gov (United States)

    Willick, J. A.; Courteau, S.; Faber, S. M.; Burstein, D.; Dekel, A.; Kolatt, T.

    1996-08-01

    The Mark III Catalog of Galaxy Peculiar Velocities comprises five different types of data files. 1. Basic Observational and Catalog Data 2. Individual Galaxy TF and Dn-sigma Distances 3. Grouped Spiral Galaxy TF Distances 4. Elliptical Galaxy Distances as in the Mark II 5. Comparison of Spiral Galaxy Distances 1. The Basic Data files are: a. Aaronson et al. Field, (359 galaxies; a82): a82file1.dat, a82file2.dat, a82file3.dat b. Mathewson et al. 1992 (1355 galaxies; mat): matfile1.dat, matfile2.dat, matfile3.dat c. Willick 1991, Perseus-Pisces sample (383 galaxies; w91pp): d. Willick 1991, Cluster galaxy sample (156 galaxies; w91cl): The basic data for all 539 objects in the w91 sample are given in the following files: w91file1.dat, w91file2.dat, w91file3.dat Some galaxies are duplicates; see below for details. e. Courteau-Faber 1993 (326 galaxies; cf): cffile1.dat, cffile2.dat, cffile3.dat f. Han-Mould et al. 1992+, Cluster galaxy sample (433 galaxies; hmcl): The basic data for all 433 galaxies the the hm sample are given in the following files: hmfile1.dat, hmfile3.dat, hmfile2.dat Some galaxies are duplicates; see below for details. 2. The Individual Spiral Galaxy Distances Files are: (See notes for detailed descriptions of how the w91pp, w91cl, hmcl and cf distance files correspond to the galaxies in the w91file*, hmfile*, and cffile* Basic Data files.) a. Aaronson et al. Field, (359 galaxies; a82): a82_s b. Mathewson et al. 1992 (1355 galaxies; mat): mat_s c. Willick 1991, Perseus-Pisces sample (326 galaxies; w91pp): w91pp_s.dat d. Willick 1991, Cluster galaxy sample (156 galaxies; w91cl): w91cl_s.dat e. Courteau-Faber 1993 (321 galaxies; cf): cf_s.dat f. Han-Mould et al. 1992+, all cluster galaxies (427 galaxies; hmcl): hmcl_s.dat 3. The Grouped Spiral Galaxy Distance Files are: (Note: Group numbers in the wcf group (merged w91pp and cf) data file correspond to those in the w91pp and cf individual galaxy files. The hmw group file (merged w91cl and hmcl, 10

  10. The Influences of Metacognitive Awareness on Reading Comprehension in Iranian English Undergraduate students in Kerman, Iran

    Directory of Open Access Journals (Sweden)

    Leila Anjomshoaa

    2012-11-01

    Full Text Available Ashcroft, B., Griffiths, G. & Tiffin, H. (2002. The Empire Writes Back: Theory and Practice in Postcolonial Literature.2nd ed. London: Routeledge, 2002.Ashcroft, B., Griffiths, G. & Tiffin, H. (1995. The post-colonial studies reader. London: Routledge,. Bhabha. H. K. ( 1990. Nation and Narration. 1sted.London:Routledge.Beckett, S. (1990. The Complete Dramatic Works of Samuel Beckett. London: Faber Faber.Brandabur, C. (2006. "The Elephant in the Living-Room: A Postcolonial Reading of Waiting for Godot". Cross Culture ,85, 128-151.Esslin, M. (2001. The Theatre of Absurd.3rded. New York: Vintage.Fanon, F. (1963. The Wretched of the Earth, New York: Grove Weidenfeld.Ghanbari, M.R. (2008. "A Comparative Study of the Notion of Waiting for a Savior in Religion and in Waiting for Godot". World Applied Sciences Journal 3: 733-737.Gleitman, C. (2008. A Concise Companion to Contemporary British and Irish Drama. Oxford: John Willey &Son, Ltd.Grene, N. (2004. The politics of Irish Drama: Plays in Context from Boucicault to Friel. Cambridge: Cambridge University Press.Hodges, S. (2010. The Digital Absurd. Unpublished Doctoral. Dissertation, the School of Literature, Communication and Culture: Georgia Institute of Technology.Hyland, P. & Sammells,N.( Ed.. ( 1994.  Irish Writing: Exile and Subversion. London: Palgrave.Kamyabi Mesak, A. ( 2002.  Beckett's Last Interview. trans. Farideh Razi. Tehran: Arvij.Knowlson, J. (2004 Damned to Fame: The Life of Samuel Beckett. New York: Grove Press.McDonald, R. (2002 Tragedy and Irish Literature: Synge, O'Casey, Beckett. New York: Palgrave.Morash,C. (2002. A History of Irish Theatre: 1601-2000.Cambridge: Cambridge University Press.Pearson, N. C. (2001 '' 'Outside of Here It's Death': Co-Dependency and the Ghost of Decolonization in Endgame''.  ELH 68, (1: 215-239.Richards, S, (Ed.. (2004. The Cambridge Companion to Twentieth-Century Irish Drama Cambridge: Cambridge University Press. Uhlmann, A. Beckett and

  11. Cuba now

    Directory of Open Access Journals (Sweden)

    Catherine A. Sunshine

    1990-01-01

    Full Text Available [First paragraph] The Cuba reader: the making of a revolutionary society. PHILIP BRENNER, WILLIAM M. LEOGRANDE, DONNA RICH, and DANIEL SIEGEL (eds.. New York: Grove Press, 1989. xxxv + 564 pp. (Paper US $14.95. Cuba: the test of time. JEAN STUBBS. London: Latin America Bureau, 1989. xvii + 142 pp. (Paper UK £3.95. Cuba: politics, economics and society. MAX AZICRI. London: Pinter Publishers Ltd., 1988. xxiii + 276 pp. (Cloth US $35.00, Paper US $12.50. Cuba libre: breaking the chains? PETER MARSHALL. Boston: Faber & Faber, 1987. viii + 300 pp. (Cloth US $18.95. The closest of enemies: a personal and diplomatic account of U.S.-Cuban relations since 1957. WAYNE S. SMITH. New York and London: W.W. Norton & Co., 1987. 308 pp. (Paper US $8.95. Imperial state and revolution: the United States and Cuba, 1952-1986. MORRIS H. MORLEY. New Rochelle, New York: Cambridge University Press, 1987. ix + 571 pp. (Paper US $16.95, Cloth US $59.50. From confrontation to negotiation: U.S. relations with Cuba. PHILIP BRENNER. Boulder, Colorado: Westview Press, 1988. x + 118 pp. (Cloth US $30.00, Paper US $9.95. Nineteen eighty-eight marked the completion of the Cuban revolution's third decade. Several events that year suggested that Cubans might finally look forward to a lessening of the island's international isolation, if not its domestic economic woes. The revolution had survived eight years of hostility from the Reagan administration. Washington's attempts to secure international censure of Cuba on human rights grounds had culminated in the visit of a United Nations delegation, at Havana's invitation and with relatively little damage to Cuba's image. Fidel Castro's visits to Ecuador and Mexico to attend the inaugurations of two Latin American presidents underscored Cuba's reinsertion into the hemispheric community. Finally, Cuban military successes against South African troops in Angola and Cuba's role in the subsequent negotiations over Angola and Namibia

  12. Hybrid Lanczos-type product methods

    Energy Technology Data Exchange (ETDEWEB)

    Ressel, K.J. [Swiss Center for Scientific Computing, Zuerich (Switzerland)

    1996-12-31

    A general framework is proposed to construct hybrid iterative methods for the solution of large nonsymmetric systems of linear equations. This framework is based on Lanczos-type product methods, whose iteration polynomial consists of the Lanczos polynomial multiplied by some other arbitrary, {open_quotes}shadow{close_quotes} polynomial. By using for the shadow polynomial Chebyshev (more general Faber) polynomials or L{sup 2}-optimal polynomials, hybrid (Chebyshev-like) methods are incorporated into Lanczos-type product methods. In addition, to acquire spectral information on the system matrix, which is required for such a choice of shadow polynomials, the Lanczos-process can be employed either directly or in an QMR-like approach. The QMR like approach allows the cheap computation of the roots of the B-orthogonal polynomials and the residual polynomials associated with the QMR iteration. These roots can be used as a good approximation for the spectrum of the system matrix. Different choices for the shadow polynomials and their construction are analyzed. The resulting hybrid methods are compared with standard Lanczos-type product methods, like BiOStab, BiOStab({ell}) and BiOS.

  13. KINEMATICS OF STELLAR POPULATIONS IN POSTSTARBURST GALAXIES

    International Nuclear Information System (INIS)

    Poststarburst galaxies host a population of early-type stars (A or F) but simultaneously lack indicators of ongoing star formation such as [O II] emission. Two distinct stellar populations have been identified in these systems: a young poststarburst population superimposed on an older host population. We present a study of nine poststarburst galaxies with the following objectives: (1) to investigate whether and how kinematical differences between the young and old populations of stars can be measured, and (2) to gain insight into the formation mechanism of the young population in these systems. We fit high signal-to-noise spectra with two independent populations in distinct spectral regions: the Balmer region, the Mg IB region, and the Ca triplet when available. We show that the kinematics of the two populations largely track one another if measured in the Balmer region with high signal-to-noise data. Results from examining the Faber-Jackson relation and the fundamental plane indicate that these objects are not kinematically disturbed relative to more evolved spheroids. A case study of the internal kinematics of one object in our sample shows it to be pressure supported and not rotationally dominated. Overall our results are consistent with merger-induced starburst scenarios where the young population is observed during the later stages of the merger

  14. SPIDER II - The Fundamental Plane of Early-type Galaxies in grizYJHK

    CERN Document Server

    La Barbera, F; de la Rosa, I G; Lopes, P A A

    2009-01-01

    We present a complete analysis of the Fundamental Plane of early-type galaxies (ETGs) in the nearby universe. The sample, as defined in paper I, comprises 39,993 ETGs located in environments covering the entire domain in local density (from field to cluster). We derive the FP of ETGs in the grizYJHK wavebands with a detailed discussion on fitting procedure, bias due to selection effects and bias due to correlated errors on r_e and mue as key factors in obtaining meaningful FP coefficients. Studying the Kormendy relation we find that its slope varies from g (3.44+-0.04) to K (3.80+-0.02) implying that smaller size ETGs have a larger ratio of optical/NIR radii than galaxies with larger re. We also examine the Faber-Jackson relation and find that its slope is similar for all wavebands, within the uncertainties, with a mean value of 0.198+-0.007. The variation of the FP coefficients for the magnitude selected sample from g through K amounts to 11%, negligible, and 10%, respectively. We find that the tilt of the F...

  15. Leukocytoclastic Vasculitis in a Patient with Ankylosing Spondylitis

    Directory of Open Access Journals (Sweden)

    Senol Kobak

    2014-01-01

    Full Text Available A 26-year-old male patient presented to our rheumatology clinic with pain, swelling and limitation of movement in his right ankle, and also purpuric skin lesions in the lower extremity pretibial region. He was asked questions, and he said that he had been having chronic low back pain and morning stiffness for the last few years. His physical examination revealed that he had arthritis in his right ankle, purpuric skin lesions in pretibial regions of both legs, and bilateral FABERE/FADIR positivity. The sacroiliac joint imaging and MRI revealed bilateral sacroiliitis findings, and the lateral heel imaging revealed enthesitis. HLA-B27 was positive. Skin biopsy from lower skin lesions was reported to be consistent with leukocytoclastic vasculitis. Based on clinical, laboratory, radiological, and pathological examinations, the patient was diagnosed with ankylosing spondylitis and leukocytoclastic vasculitis. Administration of corticosteroid, salazopyrin, and nonsteroid anti-inflammatory medications was started. Notable clinical and laboratory regression was observed during his checks 3 months later.

  16. Debonding of an elastic inhomogeneity of arbitrary shape in anti-plane shear

    Science.gov (United States)

    Wang, Xu; Yang, Moxuan; Schiavone, Peter

    2016-08-01

    We investigate the anti-plane shear problem of a curvilinear crack lying along the interface of an arbitrarily shaped elastic inhomogeneity embedded in an infinite matrix subjected to uniform stresses at infinity. Complex variable and conformal mapping techniques are used to derive an analytical solution in series form. The problem is first reduced to a non-homogeneous Riemann-Hilbert problem, the solution of which can be obtained by evaluating the associated Cauchy integral. A set of linear algebraic equations is obtained from the compatibility condition imposed on the resulting analytic function defined in the inhomogeneity and its Faber series expansion. Each of the unknown coefficients in the corresponding analytic functions can then be uniquely determined by solving the linear algebraic equations, which are written concisely in matrix form. The resulting analytical solution is then used to quantify the displacement jump across the debonded section of the interface as well as the traction distribution along the bonded section of the interface. In addition, our solution allows us to obtain mode-III stress intensity factors at the two crack tips. The solution to the anti-plane problem of a partially debonded elliptical inhomogeneity containing a confocal crack is also derived using a similar method.

  17. Bezbednost i zaštita telekomunikacionih širokopojasnih ATM mreža / Security and protection in the broadband ATM telecommunication networks

    Directory of Open Access Journals (Sweden)

    Milojko V. Jevtović

    2009-10-01

    Full Text Available U radu je prikazana analiza problema bezbednosti i zaštite telekomunikacionih širokopojasnih ATM mreža. Analizirane su brojne moguće pretnje i oblici ugrožavanja širokopojasnih mreža i navedeni zahtevi za bezbednost i zaštitu mreža. Obrađena je koncepcija bezbednosnih mehanizama. Analizirane su bezbednosne mrežne usluge i opisan bezbednosni model ATM mreža. Navedeni su problemi koji se javljaju pri realizaciji bezbednosnih mera i zaštite u komunikaciji preko ATM mreža. / Security of communications over broadband ATM networks is analyzed in this paper. Attacks on ATM networks (faber tapping, SONET (Synchronous Optical network drop/add multiplexor attacks, eavesdropping, spoofing, virtual channel stealing, service denial, traffic analysis, protocol weaknesses, ILMI (Integrated Local Management Interface attacks, PNNI (Private Network to Network Interface attacks, model of ATM and ATM security framework are described. Some problems occurring within security and protection realization in the communication over ATM networks are also specified.

  18. THE BLACK HOLE MASS-GALAXY LUMINOSITY RELATIONSHIP FOR SLOAN DIGITAL SKY SURVEY QUASARS

    Energy Technology Data Exchange (ETDEWEB)

    Salviander, S.; Shields, G. A. [Department of Astronomy, University of Texas, Austin, TX 78712 (United States); Bonning, E. W., E-mail: triples@astro.as.utexas.edu, E-mail: shields@astro.as.utexas.edu, E-mail: erin.bonning@emory.edu [Department of Physics, Emory University, Atlanta, GA 30322 (United States)

    2015-02-01

    We investigate the relationship between the mass of the central supermassive black hole, M {sub BH}, and the host galaxy luminosity, L {sub gal}, in a sample of quasars from the Sloan Digital Sky Survey Data Release 7. We use composite quasar spectra binned by black hole mass and redshift to assess galaxy features that would otherwise be overwhelmed by noise in individual spectra. The black hole mass is calculated using the photoionization method, and the host galaxy luminosity is inferred from the depth of the Ca II H+K features in the composite spectra. We evaluate the evolution in the M {sub BH}-L {sub gal} relationship by examining the redshift dependence of Δ log M {sub BH}, the offset in M {sub BH} from the local M {sub BH}-L {sub gal} relationship. There is little systematic trend in Δ log M {sub BH} out to z = 0.8. Using the width of the [O III] emission line as a proxy for the stellar velocity dispersion, σ{sub *}, we find agreement of our derived host luminosities with the locally observed Faber-Jackson relation. This supports the utility of the width of the [O III] line as a proxy for σ{sub *} in statistical studies.

  19. The Photon-Baryon Governed Universe

    Directory of Open Access Journals (Sweden)

    Laszlo A. Marosi

    2012-01-01

    Full Text Available In a previous paper we postulated that the repulsive force responsible for the universal expansion is associated with the excitation of the empty space (quantum vacuum and the excitation energy is represented by the energy of the cosmic microwave background (CMB. In this paper, we show that the concept of the repulsive space expanding photon field (i can successfully be applied to explain the local velocity anomaly of the Milky Way Galaxy as shown by Faber and Burstein (1998 and Tully (1998, (ii offers a convincing explanation of the still disputed question of the cosmological expansion on local and intergalactic scales discussed by Cooperstock et al. (1998, and (iii explains the redshift (RS of the CMB in accordance with the law of energy conservation without the need for dark matter (DM and dark energy (DE. Probably the most remarkable result of this model (abbreviated as photon/baryon: PB model in the following discussion is that the individual voids building up the soup-bubble- (SB- like galaxy distribution are the governing dynamical components of the universal expansion. Further consequence implies that the universe is considerably older than the interpretation of the Hubble constant as expansion velocity suggests.

  20. QSO Host Galaxy Luminosity and [OIII] Line Width as a Surrogate for Stellar Velocity Distribution

    CERN Document Server

    Bonning, E W; Salviander, S; McLure, R J

    2005-01-01

    Supermassive black holes in galactic nuclei show a close relationship between the black hole mass, luminosity, and stellar velocity dispersion (sigma_*) of the host galaxy bulge. Probing these relationships at high redshift may shed light on the link between the formation of the galactic bulge and central black hole, but direct measurements of stellar velocity dispersion at high redshift are difficult. We show that [OIII] line widths provide a useful surrogate for sigma_* by comparing sigma_[OIII] with the value of sigma_* predicted by the Faber-Jackson relation for QSOs with measured host galaxy luminosity. Over a wide range of AGN luminosity, sigma_[OIII] tracks sigma_*, albeit with considerable scatter. [OIII] line widths are narrower by ~0.1 dex in radio-loud QSOs than in radio-quiet QSOs of similar host luminosity. In low redshift QSOs, the ratio of star formation rate to black hole growth rate is much smaller than the typical ratio of bulge mass to black hole mass.

  1. Galactic cannibalism in the galaxy cluster C0337-2522 at z=0.59

    CERN Document Server

    Nipoti, C; Ciotti, L; Treu, T; Rosati, P

    2003-01-01

    According to the galactic cannibalism model, cD galaxies are formed in the center of galaxy clusters by merging of massive galaxies and accretion of smaller stellar systems: however, observational examples of the initial phases of this process are lacking. We have identified a strong candidate for this early stage of cD galaxy formation: a group of five elliptical galaxies in the core of the X-ray cluster C0337-2522 at redshift z=0.59. With the aid of numerical simulations, in which the galaxies are represented by N-body systems, we study their dynamical evolution up to z=0; the cluster dark matter distribution is also described as a N-body system. We find that a multiple merging event in the considered group of galaxies will take place before z=0 and that the merger remnant preserves the Fundamental Plane and the Faber-Jackson relations, while its behavior with respect to the Mbh-sigma relation is quite sensitive to the details of black hole merging [abridged].

  2. Complex tool sets for honey extraction among chimpanzees in Loango National Park, Gabon.

    Science.gov (United States)

    Boesch, Christophe; Head, Josephine; Robbins, Martha M

    2009-06-01

    Homo faber was once proposed as a label for humans specifically to highlight their unique propensity for tool use. However, new observations on complex tool use by the chimpanzees of Loango National Park, Gabon, expand our knowledge about tool-using abilities in Pan troglodytes. Chimpanzees in Loango, when using tools to extract honey from three types of bee nests, were observed to regularly use three- to five-element tool sets. In other words, different types of tools were used sequentially to access a single food source. Such tool sets included multi-function tools that present typical wear for two distinct uses. In addition, chimpanzees exploited underground bee nests and used ground-perforating tools to locate nest chambers that were not visible from the ground surface. These new observations concur with others from Central African chimpanzees to highlight the importance of honey extraction in arguments favoring the emergence of complex tool use in hominoids, including different tool types, expanded tool sets, multifunction tools, and the exploitation of underground resources. This last technique requires sophisticated cognitive abilities concerning unseen objects. A sequential analysis reveals a higher level of complexity in honey extraction than previously proposed for nut cracking or hunting tools, and compares with some technologies attributed to early hominins from the Early and Middle Stone Age. A better understanding of similarities in human and chimpanzee tool use will allow for a greater understanding of tool-using skills that are uniquely human. PMID:19457542

  3. THE BLACK HOLE MASS-GALAXY LUMINOSITY RELATIONSHIP FOR SLOAN DIGITAL SKY SURVEY QUASARS

    International Nuclear Information System (INIS)

    We investigate the relationship between the mass of the central supermassive black hole, M BH, and the host galaxy luminosity, L gal, in a sample of quasars from the Sloan Digital Sky Survey Data Release 7. We use composite quasar spectra binned by black hole mass and redshift to assess galaxy features that would otherwise be overwhelmed by noise in individual spectra. The black hole mass is calculated using the photoionization method, and the host galaxy luminosity is inferred from the depth of the Ca II H+K features in the composite spectra. We evaluate the evolution in the M BH-L gal relationship by examining the redshift dependence of Δ log M BH, the offset in M BH from the local M BH-L gal relationship. There is little systematic trend in Δ log M BH out to z = 0.8. Using the width of the [O III] emission line as a proxy for the stellar velocity dispersion, σ*, we find agreement of our derived host luminosities with the locally observed Faber-Jackson relation. This supports the utility of the width of the [O III] line as a proxy for σ* in statistical studies

  4. BLACK-HOLE-BULGE RELATIONSHIP OF POST-STARBURST QUASARS AT z ∼ 0.3

    International Nuclear Information System (INIS)

    The MBH-σ* relation has been studied extensively for local galaxies, but to date there have been scarce few direct measurements of stellar velocity dispersions for systems beyond the local universe. We investigate black hole and host galaxy properties of six 'post-starburst quasars' (PSQs) at z ∼ 0.3. Spectra of these objects simultaneously display features from the active nucleus including broad emission lines and a host galaxy Balmer absorption series indicative of the post-starburst stellar population. These are the first measurements of σ* in such objects, and we significantly increase the number of directly measured non-local objects on the MBH-σ* diagram. The 'PSQs' of our sample fall on or above the locally defined MBH-σ* relation, a result that is consistent with previous MBH-σ* studies of samples at z > 0.1. However, they are generally consistent with the MBH-Lbulge relation. Furthermore, their location on the Faber-Jackson relation suggests that some of the bulges may be dynamically peculiar.

  5. Data and 2D scaling relations for galaxies in Abell 1689: a hint of size evolution at z~0.2

    CERN Document Server

    Houghton, R C W; Bonta, E Dalla; Masters, R

    2012-01-01

    {abridged} We present imaging and spectroscopy of Abell 1689 (z=0.183) from GEMINI/GMOS-N and HST/ACS. We measure integrated photometry from the GMOS g' and r' images (for 531 galaxies) and surface photometry from the HST F625W image (for 43 galaxies) as well as velocities and velocity dispersions from the GMOS spectra (for 71 galaxies). We construct the Kormendy relation (KR), Faber-Jackson relation (FJR) and colour-magnitude relation (CMR) for early-type galaxies in Abell 1689 using this data and compare them to those of the Coma cluster. We measure the intrinsic scatter of the CMR in Abell 1689 to be 0.054 \\pm 0.004 mag which places degenerate constraints on the ratio of the assembly timescale to the time available (beta) and the age of the population. Making the assumption that galaxies in Abell 1689 will evolve into those of Coma over an interval of 2.26 Gyr breaks this degeneracy and limits beta to be > 0.6 and the age of the red sequence to be > 5.5 Gyr (formed at z > 0.55). Without corrections for siz...

  6. Virial and Jet-induced Velocities in Seyfert Galaxies. III. Galaxy Luminosity as Virial Parameter

    Science.gov (United States)

    Whittle, Mark

    1992-03-01

    This is the third paper in a series which aims to identify the acceleration mechanisms acting on the ionized gas in the narrow line region (NLR) of Seyfert galaxies. Using the sample and approach described in Papers I and II, galaxy luminosity, M_tot_, and bulge luminosity, M_bul_, are taken as the principal parameters describing nuclear virial speeds, while radio luminosity and morphology are used to track possible nuclear perturbations. The fundamental conclusions from Paper II are confirmed. Plots of [O III] FWHM versus M_tot_ or M_bul_ show strong correlations (R ~ 0.6, P_null_~10^-8^) indicating that gravity plays a key role in defining the NLR velocity field. However, Seyfert galaxies with linear radio morphology and high radio luminosity (L_1415_>=10^22.5^ W Hz^-1^) have systematically broader lines, suggesting that acceleration of NLR gas by outflowing jets is also important in some Seyferts. For Seyfert galaxies without linear radio sources, [O III] FWHM is more fundamentally related to M_bul_ than M_tot_. Indeed, the scatter in the M_tot_ versus [O III] FWHM relation has a Hubble-type dependence which is identical to the Hubble-type dependence of the bulge/total ratio used in the evaluation of M_bul_ from M_tot_. This agreement between photometrically defined bulge/total ratio for normal spirals and kinematically defined bulge/total ratio for Seyfert galaxies lends powerful support to the argument that M_bul_ is playing the fundamental role. A fit to the M_bul_ versus [O III] FWHM relation of the form L_bul_ is proportional to (FWHM)^n^ gives gradient n ~ 2.2, zero point FWHM_20_~ 250 km s^-1^ (where FWHM_20_ = FWHM at M_bul_ = -20), and ~1 mag scatter. This is compared to the Faber-Jackson relation for normal galaxies, L_bul_ is proportional to (FWHM_stars_)^n^, where n ~ 3.2 and FWHM_20_~360 km s^-1^. The overall similarity of these two relations supports the virial origin of [O III] FWHM. In detail, however, the Seyferts appear offset from the Faber

  7. SDSS J0246-0825: A New Gravitationally Lensed Quasar from the Sloan Digital Sky Survey

    Energy Technology Data Exchange (ETDEWEB)

    Inada, N; Burles, S; Gregg, M D; Becker, R H; Schechter, P L; Eisenstein, D J; Oguri, M; Castander, F J; Hall, P B; Johnston, D E; Pindor, B; Richards, G T; Schneider, D P; White, R L; Brinkmann, J; Szalay, A; York, D G

    2005-11-10

    We report the discovery of a new two-image gravitationally lensed quasar, SDSS J024634.11-082536.2 (SDSS J0246-0825). This object was selected as a lensed quasar candidate from the Sloan Digital Sky Survey (SDSS) by the same algorithm that was used to discover other SDSS lensed quasars (e.g., SDSS J0924+0219). Multicolor imaging with the Magellan Consortium's Walter Baade 6.5-m telescope and the spectroscopic observations using the W. M. Keck Observatory's Keck II telescope confirm that SDSS J0246-0825 consists of two lensed images ({Delta}{theta} = 1''.04) of a source quasar at z = 1.68. Imaging observations with the Keck telescope and the Hubble Space Telescope reveal an extended object between the two quasar components, which is likely to be a lensing galaxy of this system. From the absorption lines in the spectra of quasar components and the apparent magnitude of the galaxy, combined with the expected absolute magnitude from the Faber-Jackson relation, we estimate the redshift of the lensing galaxy to be z = 0.724. A highly distorted ring is visible in the Hubble Space Telescope images, which is likely to be the lensed host galaxy of the source quasar. Simple mass modeling predicts the possibility that there is a small (faint) lensing object near the primary lensing galaxy.

  8. Origin of Natural Gas in Kekeya Field, Tarim Basin, China

    Institute of Scientific and Technical Information of China (English)

    Hou Dujie; Xiao Zhongyao; Tang Youjun; Zhu Junzhang; Li Xianqing

    2004-01-01

    This paper is mainly concentrated on the geochemical characteristics and origin of gas of Kekeya field in the Tarim basin, NW China. This study shows that Permian mudstone is the main source rock of oil and gas. Based on the carbon isotopes of C1-C4, the carbon isotope of gas in Kekeya field is a little heavier than that in the typical marine-derived gas. The relationship between carbon isotopes of methane and ethane is coincident with Faber equation of gas derived from organic matter Ⅰ/Ⅱ. The majority of gas maturity is estimated, based on the formula, at 1.8 %-2.2 % besides K2 and K18 wells. In addition, the gas derived from 0.9 %-1.2 % Ro source rocks may also be mixture. 40Ar/36Ar and 3He/4He ratios from the gas samples also support the mixing process. Moreover, the gas in this region is mainly generated from more mature source rocks although the low mature gas exists.

  9. The Black Hole-Bulge Relationship in Luminous Broad-Line Active Galactic Nuclei and Host Galaxies

    CERN Document Server

    Shen, J; Schneider, D P; Hall, P B

    2007-01-01

    We have measured the stellar velocity dispersions (\\sigma_*) and estimated the central black hole (BH) masses for over 900 broad-line active galactic nuclei (AGNs) observed with the Sloan Digital Sky Survey. The sample includes objects which have redshifts up to z=0.452, high quality spectra, and host galaxy spectra dominated by an early-type (bulge) component. The AGN and host galaxy spectral components were decomposed using an eigenspectrum technique. The BH masses (M_BH) were estimated from the AGN broad-line widths, and the velocity dispersions were measured from the stellar absorption spectra of the host galaxies. The range of black hole masses covered by the sample is approximately 10^6 < M_BH < 10^9 M_Sun. The host galaxy luminosity-velocity dispersion relationship follows the well-known Faber-Jackson relation for early-type galaxies, with a power-law slope 4.33+-0.21. The estimated BH masses are correlated with both the host luminosities (L_{H}) and the stellar velocity dispersions (\\sigma_*), s...

  10. WORKING AS VENDORS AS A PROFESSION CHOSEN BY PEOPLE WITH LIMITED CAPITALS IN TOURISM SECTOR IN BALI

    Directory of Open Access Journals (Sweden)

    Ni Made Ary Widiastini

    2014-03-01

    Full Text Available This study was intended to present the matters pertaining to the attempts made by the vendors ‘pedagang acung’ to keep being independent in tourism sector in Bali. As working people with extremely limited capitals, the principle of giving priority to safety is applicable to them. They sell souvenirs with limited capitals obtained from various souvenir entrepreneurs coming from different parts of Bali. The risk of suffering from loss has never caused them to find any difficulty. This qualitative study was conducted in the paradigm of cultural studies. The data were presented and interpreted in the form of narrative texts which are thick descriptive in nature.   The result of the study showed that working as vendors was still a profession which contributed to the decrease in unemployment in an area. This is in line with the concept of poststructuralism that people are basically referred to as homo faber, namely, the working creature, meaning that working is highly important to man. This means that employment does not only give the opportunity to generate income but also importantly means that employment is a personal identity. As a consequence, if working is different from not working or being jobless, then such a choice does not only lead to an opposing binary but also to a hierarchical social division and a structured social gap between those who are employed and those who are not. They all positively contribute to themselves, environment, entrepreneurs, and the local government. 

  11. Effects of depleted uranium on survival, growth, and metamorphosis in the african clawed frog (Xenopus laevis)

    Science.gov (United States)

    Mitchell, S.E.; Caldwell, C.A.; Gonzales, G.; Gould, W.R.; Arimoto, R.

    2005-01-01

    Embryos (stage 8-47, Nieuwkoop and Faber) of the African clawed frog (Xenopus laevis) were subjected to water-borne depleted uranium (DU) concentrations that ranged from 4.8 to 77.7 mg/Lusing an acute 96-h frog embryo teratogenesis assay-Xenopus (FETAX). In a chronic 64-d assay, X. laevis (from embryo through metamorphosis; stages 8-66) were subjected to concentrations of DU that ranged from 6.2 to 54.3 mg/L Our results indicate DU is a non teratogenic metal. No effects on mortality, malformations, or growth were observed in the 96-h FETAX with concentrations of DU that ranged from 4.8 to 77.7 mg/L From stage 8 to stage 47, X. laevis tadpoles do not actively feed and the gills are not well developed. Thus, uptake of DU was reduced despite exposure to elevated concentrations. The 64-d assay resulted in no concentration response for either mortality or malformations; however, a delay in metamorphosis was observed in tadpoles subjected to elevated DU concentrations (from 13.1 to 54.3 mg/L) compared to tadpoles in both the well-water control and reference. The delay in metamorphosis was likely due to increasing body burden of DU that ranged from 0.98 to 2.82 mg/kg. Copyright?? Taylor & Francis Inc.

  12. Permeable membranes - a tool for simplified sampling of hydrocarbon gases?; Permeable Membranen - Ein Wekzeug zur vereinfachten Probenahme von Kohlenwasserstoff-Gasen?

    Energy Technology Data Exchange (ETDEWEB)

    Faber, E.; Hollerbach, A.; Poggenburg, J.; Stahl, W. [BGR, Hannover (Germany); Kaiser, H. [KaiserGEOconsult GmbH, Erlangen (Germany); Huebner, M. [Siemens AG, Erlangen (Germany); Tobschall, H.J. [Erlangen-Nuernberg Univ. (Germany). Lehrstuhl fuer Angewandte Geologie

    1998-12-31

    Tissue membranes are commonly used for leak detection in gas pipes. Another interesting application is in the isolation of hydrocarbons in water, sediments and soils. this requires knowledge of the time variations of the parameters of the diffusion gases, e.g. gas and isotope fractionations. Laboratory experiments were carried out in order to describe these parameters. (orig.) [Deutsch] Membranen haben die spezifische Eigenschaft fuer bestimmte Stoffe in der Gasphase durchlaessig, fuer andere mehr oder weniger undurchlaessig zu sein. Grundlage fuer ein derartiges Trennverhalten ist die Gasdiffusion durch Membranen, die mit unterschiedlichen Diffusionskoeffizienten der verschiedenen Komponenten erfolgt. Membranen in Schlauchform sind in industriellem Massstab verfuegbar und werden zur Erkennung von Ortung von Gas-Leckagen eingesetzt (Huebner und Lilie, 1997). Ueber die Leckage-Thematik hinaus besteht Interesse, das Membransystem fuer neue Anwendungsbereiche wie z.B. die Isolierung von Kohlenwasserstoffgasen aus Wasser, Sedimenten oder auch Boeden zu verwenden, um detaillierte Informationen ueber ihre Natur und ihre Herkunft aus der Gaszusammensetzung und den Kohlenstoff-Isotopenwerten (Faber, 1987) abzuleiten. Voraussetzung hierfuer ist die Kenntnis ueber die zeitlichen Aenderungen der Parameter der diffundierenden Gase, d.h. ueber die bei Diffusionsvorgaengen grundsaetzlich auftretenden Gas- und Isotopenfraktionierungen. Verschiedene Laborversuche wurden durchgefuehrt, um diese Parameter zu bestimmen. (orig.)

  13. The growth of disks and bulges during hierarchical galaxy formation. I: fast evolution vs secular processes

    CERN Document Server

    Tonini, Chiara; Croton, Darren J; Wyithe, J Stuart B

    2016-01-01

    We present a theoretical model for the evolution of mass, angular momentum and size of galaxy disks and bulges, and we implement it into the semi-analytic galaxy formation code SAGE. The model follows both secular and violent evolutionary channels, including smooth accretion, disk instabilities, minor and major mergers. We find that the combination of our recipe with hierarchical clustering produces two distinct populations of bulges: merger-driven bulges, akin to classical bulges and ellipticals, and instability-driven bulges, akin to secular (or pseudo-)bulges. The model can successfully reproduce the mass-size relation of gaseous and stellar disks, the evolution of the mass-size relation of ellipticals, the Faber-Jackson relation, and the magnitude-colour diagram of classical and secular bulges. The model predicts only a small overlap of merger-driven and instability-driven components in the same galaxy, and predicts different bulge types as a function of galaxy mass and disk fraction. Bulge type also affe...

  14. Dwarf Galaxies in the Coma Cluster: I. Velocity Dispersion Measurements

    CERN Document Server

    Kourkchi, E; Carter, D; Karick, A M; Mármol-Queraltó, E; Chiboucas, K; Tully, R B; Mobasher, B; Guzmán, R; Matković, A; Gruel, N

    2011-01-01

    We present the study of a large sample of early-type dwarf galaxies in the Coma cluster observed with DEIMOS on the Keck II to determine their internal velocity dispersion. We focus on a subsample of 41 member dwarf elliptical galaxies for which the velocity dispersion can be reliably measured, 26 of which were studied for the first time. The magnitude range of our sample is $-21Faber-Jackson...

  15. Demographics of galactic bulges in the local universe through optical windows

    Science.gov (United States)

    Kim, Keunho; Oh, Sree; Jeong, Hyunjin; Yi, Sukyoung

    2016-01-01

    We present our results of two-dimensional bulge-disk decompositions for 14,659 galaxies drawn from SDSS DR12 in order to examine properties of bulges residing in the local universe (0.005 0.2) show almost constant (g-r) colors regardless of their size. We also investigated the scaling relations (Kormendy and Faber-Jackson relations), which ellipticals are generally known to follow, for all of our sample bulges. Specifically, we have found that low B/T (0.1population on the tilt with Hβ absorption line strengths and found that a significant tilt (at least more than ~ 30 % of the tilt) mainly arises from the effect of young stellar population in bulges. This implies that bulges are basically virialized systems irrespective of their size and thus the scatters about the scaling relations are a result of the presence of young stellar population preferentially in low B/T bulges. Drawn from our results, bulges seem very similar to ellipticals, although they are thought to be formed through the different formation mechanisms.

  16. Halo and Subhalo Demographics with Planck Cosmological Parameters: Bolshoi-Planck and MultiDark-Planck Simulations

    CERN Document Server

    Rodriguez-Puebla, Aldo; Primack, Joel; Klypin, Anatoly; Lee, Christoph; Hellinger, Doug

    2016-01-01

    We report and provide fitting functions for the abundance of dark matter halos and subhalos as a function of mass, circular velocity, and redshift from the new Bolshoi-Planck and MultiDark-Planck $\\Lambda$CDM cosmological simulations, based on the Planck cosmological parameters. We also report the halo mass accretion rates, which may be connected with galaxy star formation rates. We show that the higher cosmological matter density of the Planck parameters compared with the WMAP parameters leads to higher abundance of massive halos at high redshifts. We find that the median halo spin parameter $\\lambda_{\\rm B} = J(2M_{\\rm vir}R_{\\rm vir}V_{\\rm vir})^{-1}$ is nearly independent of redshift, leading to predicted evolution of galaxy sizes that is consistent with observations, while the significant decrease with redshift in median $\\lambda_{\\rm P} = J|E|^{-1/2}G^{-1}M^{-5/2}$ predicts more decrease in galaxy sizes than is observed. Using the Tully-Fisher and Faber-Jackson relations between galaxy velocity and mass...

  17. "A IMPORTÂNCIA DO ATO DE LER": LEITURAS CRÍTICAS NA FORMAÇÃO DO ADMINISTRADOR [doi: 10.5329/RECADM.20070602006

    Directory of Open Access Journals (Sweden)

    Carolina de Albuquerque Maranhão

    2007-11-01

    Full Text Available Através da leitura de Freire acerca da importância do ato de ler, propõe-se a discussão sobre a formação crítica do profissional de Administração. Essa formação passa pela conscientização de que a educação não é neutra e de que o discurso presente na mídia de massa e nas fontes de pesquisa utilizadas é persuasivo, tentando convencer o leitor de uma determinada visão da realidade. Para ilustrar o impacto que este silenciamento pode ter na formação do administrador, serão apresentadas as denúncias de uso de mão-de-obra infantil na cadeia produtiva da Tinta Suvinil, Tinta Coral, ONG Mão de Minas e Faber Castell. Ao final, são apresentadas as diretrizes de Freire para o ensino crítico, bem como a indicação de fontes de pesquisa críticas que podem auxiliar o trabalho do docente de Administração, a fim de despertar os alunos em relação a uma visão menos ingênua e astuta desta ciência social aplicada.

  18. The magnification of SN 1997ff, the farthest known supernova

    Energy Technology Data Exchange (ETDEWEB)

    Benitez, Narciso; Riess, Adam; Nugent, Peter; Dickinson, Mark; Chornock, Ryan; Filippenko, Alexei V.

    2002-09-03

    With a redshift of z {approx} 1.7, SN 1997ff is the most distant type Ia supernova discovered so far. This SN is close to several bright, z = 0.6-0.9 galaxies, and we consider the effects of lensing by those objects on the magnitude of SN 1997ff. We estimate their velocity dispersions using the Tully-Fisher and Faber-Jackson relations corrected for evolution effects, and calculate, applying the multiple-plane lensing formalism, that SN 1997ff is magnified by 0.34{+-}0.12 mag. Due to the spatial configuration of the foreground galaxies, the shear from individual lenses partially cancels out,and the total distortion induced on the host galaxy is considerably smaller than that produced by a single lens having the same magnification. After correction for lensing, the revised distance to SN 1997ff is m-M = 45.49 {+-} 0.34 mag, which improves the agreement with the {Omega}{sub M} = 0.35, {Omega}{Lambda} = 0.65 cosmology expected from lower-redshift SNe Ia, and is inconsistent at the {approx} 3 sigma confidence level with a uniform gray dust model or a simple evolution model.

  19. Deixis en Fantasma; Notas de Derrida sobre el simbolista Mallarmé

    Directory of Open Access Journals (Sweden)

    Gabriel Restrepo

    2009-01-01

    Full Text Available Se examina el concepto de deixis en fantasma – título del ensayo - , en la covicción de que toda deixis en una tradición metafísica es deixis en fantasma. En otros términos, el horizonte de indagación que aquí se esbozará apunta a indicar que pese a los pensadores de la sospecha, pese al martillo de Nietzsche, pese a la destrucción de Heidegger (Zerstörung y pese a la desconstrucción de Derrida, la tradición de la metafísica es más resistente e insistente de lo que parece y que la promesa abierta por este pensador debería tomarse apenas como el principio de una tarea que es imperativa porque sin ella no puede pensarse lo que ha sido impensado por el logocentrismo, el eurocentrismo, el androcentrismo (no sólo limitado al pensamiento del hombre sobre el hombre con exclusión de lo femenino, sino como pensamiento de la especie con narcisismo de especie y devaluación del bios y del zoe , el etareocentrismo (el pensamiento del sénex en las culturas arcaicas, el pensamiento del homo faber en la modernidad, el etnocentrismo, los solipsismos y tantas otras formas de jibarismo filosófico (una reducción de cabezas inimaginada incluso por la Navaja de Ockham.

  20. Low cation coordination in oxide melts

    Energy Technology Data Exchange (ETDEWEB)

    Skinner, Lawrie [State University of New York, Stony Brook; Benmore, Chris J [Argonne National Laboratory (ANL); Du, Jincheng [University of North Texas; Weber, Richard [Argonne National Laboratory (ANL); Neuefeind, Joerg C [ORNL; Tumber, Sonia [Materials Development, Inc., Evanston, IL; Parise, John B [Stony Brook University (SUNY)

    2014-01-01

    The complete set of Faber-Ziman partial pair distribution functions for a rare earth oxide liquid were measured for the first time by combining aerodynamic levitation, neutron diffraction, high energy x-ray diffraction and isomorphic substitution using Y2 O3 and Ho2 O3 melts. The average Y- O coordination is measured to be 5.5(2), which is significantly less than the octahedral coordination of crystalline Y2 O3 (or Ho2 O3 ). Investigation of high temperature La2 O3 , ZrO2 , SiO2 , and Al2 O3 melts by x-ray diffraction and molecular dynamics simulations also show lower-than-crystal cation- oxygen coordination. These measurements suggest a general trend towards lower M-O coordination compared to their crystalline counterparts. It is found that this coordination number drop is larger for lower field strength, larger radius cations and is negligible for high field strength (network forming) cations. These findings have broad implications for predicting the local structure and related physical properties of metal-oxide melts and oxide glasses.

  1. On the mass-radius relation of hot stellar systems

    CERN Document Server

    Gieles, Mark; Heggie, Douglas; Lamers, Henny

    2010-01-01

    Most globular clusters have half-mass radii of a few pc with no apparent correlation with their masses. This is different from elliptical galaxies, for which the Faber-Jackson relation suggests a strong positive correlation between mass and radius. Objects that are somewhat in between globular clusters and low-mass galaxies, such as ultra-compact dwarf galaxies, have a mass-radius relation consistent with the extension of the relation for bright ellipticals. Here we show that at an age of 10 Gyr a break in the mass-radius relation at ~10^6 Msun is established because objects below this mass, i.e. globular clusters, have undergone expansion driven by stellar evolution and hard binaries. From numerical simulations we find that the combined energy production of these two effects in the core comes into balance with the flux of energy that is conducted across the half-mass radius by relaxation. An important property of this `balanced' evolution is that the cluster half-mass radius is independent of its initial val...

  2. Electrical, thermal, and species transport properties of liquid eutectic Ga-In and Ga-In-Sn from first principles

    Energy Technology Data Exchange (ETDEWEB)

    Yu, Seungho; Kaviany, Massoud, E-mail: kaviany@umich.edu [Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

    2014-02-14

    Using ab initio molecular dynamics, the atomic structure and transport properties of eutectic Ga-In and Ga-In-Sn are investigated. The Kubo-Greenwood (K-G) and the Ziman-Faber (Z-F) formulations and the Wiedemann-Franz (W-F) law are used for the electrical and electronic thermal conductivity. The species diffusivity and the viscosity are also predicted using the mean square displacement and the Stokes-Einstein (S-E) relation. Alloying Ga causes more disordered structure, i.e., broadening the atomic distance near the In and Sn atoms, which reduces the transport properties and the melting temperature. The K-G treatment shows excellent agreement with the experimental results while Z-F treatment formula slightly overestimates the electrical conductivity. The predicted thermal conductivity also shows good agreement with the experiments. The species diffusivity and the viscosity are slightly reduced by the alloying of Ga with In and Sn atoms. Good agreements are found with available experimental results and new predicted transport-property results are provided.

  3. Effects of Water Pollution in Koluama Area, Niger Delta Area, Nigeria Fish Species Composition, Histology, Shrimp Fishery and Fishing Gear Type

    Directory of Open Access Journals (Sweden)

    J.F.N. Abowei

    2013-06-01

    Full Text Available The effect of water pollution in Koluama Area in the Niger Delta region of Nigeria to determine its effects on fish species composition, histology, shrimp fishery and fishing gear type. A total of twenty (20 species belonging to eleven (11 families were recorded. Strongylura senegalensis, Lagocephalus laevigatus, Tarpon atlantica, Pristis pristis, Galeoides decadatylus and Butis koilomatodon were rare. Ephippion guttifer, Chaetodipterus goreensis, Sardinella maderensis, Sardinella aurita, Liza falcipinnis, Mugil bananensis, Pentanemus quinquarius, Polydactylus quadrafilis and Trichuris lepturis were common. Ethmalosa fimbriata, Liza grandisquamis, Sphyraena guachancho, Mugil curema, Sphyraena guachancho and Dormitator pleurops were abundant. None was dominant. The highest number of fish species (16 were recorded in fish town and none was recorded in Kuloma 1 and one (1 was recorded for Kulauma 11. Foroupa, Ekeni, Ejetu and Ikebiri fishing port 1 and 2 recorded 8, 7, 3 and 5 fish species respectively. Artisanal fishing is based on traditional methods of fishing using essentially canoe and different fishing nets which depend on the season and target fish species. Canoes may be motorized or hand-paddled. Common gear types include shrimp traps, drift gill nets, set gill nets, cast nets, seine nets, hook and lines. Lift nets may be use by women folk who target small shrimp species in the creeks and creek lets. Other fishing methods include hand-picking for periwinkles, oysters and other shellfish by women folk and children. Prominent among the fishing devices are edek, a type of fish fence used in the creeks; alot, a large trap used on sand and mud-banks in the estuaries; and otunwa, a barbed spear. Fishers using these devices either operated from their home villages, exploiting the nearby waters, or staged long distance fishing expeditions, during which they lived in distant camps or house-boats. The heavy metals concentration level values are: Cd

  4. New precise determination of the high temperature unusual temperature dependent thermopower of liquid divalent cadmium and zinc

    International Nuclear Information System (INIS)

    We do not know any precise measurement of the absolute thermopower (ATP) of liquid cadmium and zinc at high temperatures. For liquid cadmium, there are, in the literature, apparent contradictory results. Bath and Kliem and North and Wagner observed that the ATP increases with temperature between 350 deg. C and 650 deg. C, but Bradley observed the opposite behaviour between 600 deg. C and 750 deg. C. In this work we measured accurately the absolute thermopower of liquid cadmium from the melting point up to 900 deg. C. We find a maximum around 520 deg. C, and then the thermopower decreases down to a surprising negative value. To our knowledge, it is the first time that such an unusual behaviour is reported. Nevertheless, it is qualitatively consistent with all the authors mentioned and the apparent contradictory results should only be due to the different temperature ranges of measurements. Using the ATP expression from the Faber-Ziman formalism, we can fit very well the experimental absolute thermopower versus temperature curve with only one adjustable parameter. For this, we have considered that the temperature dependence of the ATP is dominated by the resistivity, and we have introduced the experimental resistivity temperature dependence in the ATP expression. The very good fitting quality demonstrates that our hypothesis is consistent. In contrast, the liquid zinc ATP only increases with temperature. Nevertheless, near 1100 deg. C, the highest temperature achieved, it shows saturation that may be an indication of a decrease at higher temperature. The same type of fitting gives also quite good results. (author)

  5. Waterborne exposure to triadimefon causes thyroid endocrine disruption and developmental delay in Xenopus laevis tadpoles.

    Science.gov (United States)

    Li, Meng; Li, Shuying; Yao, Tingting; Zhao, Renjie; Wang, Qiangwei; Zhu, Guonian

    2016-08-01

    Triadimefon (TDF) is a triazole-derivative fungicide that is detectable in the environment and target agricultural products, prompting concern over its risk to wildlife and human health. In our study, Nieuwkoop & Faber stage 51 Xenopus laevis tadpoles were exposed to different nominal concentrations TDF (0, 0.112, and 1.12mg/L) for 21 days while the tadpoles were undergoing pre-morphological development. Developmental condition, bioaccumulation and thyroid hormone levels, and mRNA expression of genes involved in the hypothalamic-pituitary-thyroid (HPT) axis were examined. Exposure to TDF caused a reduction in developmental rates on pre-metamorphosis of X. laevis. TDF exposure significantly decreased thyroid hormone (T4 and T3) concentrations, indicating thyroid endocrine disruption. The downregulation of thyroglobulin and upregulation of genes related to thyroid hormone metabolism (ugt1ab) might be responsible for the decreased thyroid hormone concentrations. Treatment with TDF also significantly increased mRNA expression of genes involved in thyroid-stimulating hormone as a compensatory mechanism response to decreased thyroid hormone concentrations. Gene expression and in silico ligand docking studies were combined to study the interaction between TDF and thyroid hormone receptor. Results showed that TDF could consequently affect the HPT axis signaling pathway. In addition, bioconcentration of TDF was observed in tadpoles, indicating the bioactivity of this compound. Taken together, the results suggest that TDF alters the HPT axis-related genes and changes thyroid hormone contents in X. laevis tadpoles, thus causing thyroid endocrine disruption and consequently delaying thyroid hormones-dependent metamorphic development. PMID:27289584

  6. Sex-dependent expression of anti-Müllerian hormone (amh) and amh receptor 2 during sex organ differentiation and characterization of the Müllerian duct development in Xenopus tropicalis.

    Science.gov (United States)

    Jansson, Erika; Mattsson, Anna; Goldstone, Jared; Berg, Cecilia

    2016-04-01

    Amphibian gonadal differentiation involves the action of sex steroids. Recent research indicates that the anti-Müllerian hormone (AMH) is involved in testicular development in some lower vertebrate species. For amphibians there is a lack of data on ontogenetic expression of the AMH receptor AMHR2/amhr2 and of progesterone receptors (PGRS/pgrs). Here we expand the knowledge on amphibian sex differentiation by characterizing ontogenetic mRNA levels of amh, amhr2, intracellular and membrane pgrs (ipgr and mpgr beta) and cytochrome P450 19a1 (cyp19a1) (ovarian marker) in the urogenital complex of the model species Xenopus (Silurana) tropicalis. Furthermore, we characterized the ontogenetic development of the Müllerian ducts (precursors of the female reproductive tract) histologically. The developmental period investigated spanned from beginning of gonadal differentiation, Nieuwkoop and Faber (NF) stage 51, to 4weeks post-metamorphosis. The Müllerian ducts were first observed at NF 64 in both sexes. Male-enhanced amh mRNA levels from NF 53/54 to 6days post-metamorphosis and female-enhanced cyp19a1 levels from NF 53 to 4weeks post-metamorphosis were noted. The sexually dimorphic mRNA level profile was more distinct for amh than for cyp19a1. The pgrs mRNA levels increased over the studied period and showed no sex differences. At later developmental stages, the amhr2 mRNA level was increased in putative females compared with males. Our findings suggest that AMH has a role in gonadal differentiation in X. tropicalis. We propose relative gonadal amh mRNA level as a testicular marker during early gonadal development in amphibians. PMID:26987287

  7. Exposure of xenopus laevis tadpoles to cadmium reveals concentration-dependent bimodal effects on growth and monotonic effects on development and thyroid gland activity

    Science.gov (United States)

    Sharma, Bibek; Patino, R.

    2008-01-01

    Xenopus laevis were exposed to 0-855 ??g cadmium (Cd)/l (measured concentrations) in FETAX medium from fertilization to 47 days postfertilization. Measurements included embryonic survival and, at 47 days, tadpole survival, snout-vent length, tail length, total length, hindlimb length, weight, Nieuwkoop-Faber (NF) stage of development, initiation of metamorphic climax (??? NF 58), and thyroid follicle cell height. Embryonic and larval survival were unaffected by Cd. Relative to control tadpoles, reduced tail and total length were observed at 0.1- 8 and at 855 ??g Cd/l; and reduced snout-vent length, hindlimb length, and weight were observed at 0.1-1 and at 855 ??g Cd/l. Mean stage of development and rate of initiation of climax were unaffected by Cd at 0-84 ??g/l; however, none of the tadpoles exposed to 855 ??g Cd/l progressed beyond mid-premetamorphosis (NF 51). Thyroid glands with fully formed follicles were observed in all tadpoles ??? NF 49 examined. Follicle cell height was unaffected by Cd at 0-84 ??g/l but it was reduced at 855 ??g/l; in the latter, cell height was reduced even when compared with NF 49-51 tadpoles pooled from the 0 to 84 ??g Cd/l groups. In conclusion, (1) Cd affected tadpole growth in a bimodal pattern with the first and second inhibitory modes at concentrations below and above 84 ??g Cd/l, respectively; (2) exposure to high Cd concentrations (855 ??g/l) reduced thyroid activity and arrested tadpole development at mid-premetamorphosis; and (3) unlike its effect on growth, Cd inhibited tadpole development and thyroid function in a seemingly monotonic pattern.

  8. The new materials and the - environment

    International Nuclear Information System (INIS)

    One of the biggest tensions that exist at the present time is the established one between the imperatives of the technological development and the necessity of not contaminating more the world. In this wide mark it register the considerations that are made here, focused from a particular discipline as it is the science of the materials, since there is implicit in her two activities that are sometimes opposed: the production of the materials and the preservation of the environment. It is observed that practically all the processes of obtaining of materials produce contamination of the environment and that to avoid it implies very important costs for the products in an economy of open market; For this reason it is pertinent to make some reflections on the interrelation among these two important technological tasks. It is common that when speaking, of the impact of the environment, such a discussion only refers to the impact on the alive beings and although this is the primordial thing, it should not forget that the inanimate matter that surrounds us it suffers, and it causes, effects of the environment in a way that is as decisive in our life as the one that we experience the biological organisms. The key of the general problem and of the matter that is approached, it resides in that the first man manufactures and then it considers the consequences. The homo Faber spreads to guide to the Homo sapiens. There are very painful examples of it and we all have to live with the not foreseen consequences of the technological advance

  9. The growth of disks and bulges during hierarchical galaxy formation. I: fast evolution vs secular processes

    Science.gov (United States)

    Tonini, C.; Mutch, S. J.; Croton, D. J.; Wyithe, J. S. B.

    2016-04-01

    We present a theoretical model for the evolution of mass, angular momentum and size of galaxy disks and bulges, and we implement it into the semi-analytic galaxy formation code SAGE. The model follows both secular and violent evolutionary channels, including smooth accretion, disk instabilities, minor and major mergers. We find that the combination of our recipe with hierarchical clustering produces two distinct populations of bulges: merger-driven bulges, akin to classical bulges and ellipticals, and instability-driven bulges, akin to secular (or pseudo-)bulges. The model mostly reproduces the mass-size relation of gaseous and stellar disks, the evolution of the mass-size relation of ellipticals, the Faber-Jackson relation, and the magnitude-colour diagram of classical and secular bulges. The model predicts only a small overlap of merger-driven and instability-driven components in the same galaxy, and predicts different bulge types as a function of galaxy mass and disk fraction. Bulge type also affects the star formation rate and colour at a given luminosity. The model predicts a population of merger-driven red ellipticals that dominate both the low-mass and high-mass ends of the galaxy population, and span all dynamical ages; merger-driven bulges in disk galaxies are dynamically old and do not interfere with subsequent evolution of the star-forming component. Instability-driven bulges dominate the population at intermediate galaxy masses, especially thriving in massive disks. The model green valley is exclusively populated by instability-driven bulge hosts. Through the present implementation the mass accretion history is perceivable in the galaxy structure, morphology and colours.

  10. Effects of cadmium, estradiol-17β and their interaction on gonadal condition and metamorphosis of male and female African clawed frog, Xenopus laevis

    Science.gov (United States)

    Sharma, Bibek; Patino, Reynaldo

    2010-01-01

    To assess interaction effects between cadmium (Cd, a putative xenoestrogen) and estradiol-17?? (E2) on sex differentiation and metamorphosis, Xenopus laevis were exposed to solvent-control (0.005% ethanol), Cd (10 ??g L-1), E2 (1 ??g L-1), or Cd and E2 (Cd + E2) in FETAX medium from fertilization to 75 d postfertilization. Each treatment was applied to four aquaria, each with 30 fertilized eggs. Mortality was recorded and animals were sampled as they completed metamorphosis (Nieuwkoop and Faber stage 66). Gonadal sex of individuals (including tadpoles ???NF stage 55 at day 75) was determined gross-morphologically and used to compute sex ratios. Time course and percent completion of metamorphosis, snout-vent length (SVL), hindlimb length (HLL) and weight were analyzed for each gender separately. Survival rates did not differ among treatments. The E2 and Cd + E2 treatments significantly skewed sex ratios towards females; however, no sex-ratio differences were observed between the control and Cd treatments or between the E2 and Cd + E2 treatments. Time course of metamorphosis was generally delayed and percent completion of metamorphosis was generally reduced in males and females exposed to Cd, E2 or their combination compared to control animals. In males, but not females, the effect of Cd + E2 was greater than that of individual chemicals. Weight at completion of metamorphosis was reduced only in females and only by the Cd + E2 treatment. In conclusion, although Cd at an environmentally relevant concentration did not exhibit direct or indirect feminizing effects in Xenopus tadpoles, the metal and E2 both had similar inhibitory effects on metamorphosis that were of greater magnitude in males than females.

  11. Effects of cadmium, estradiol-17beta and their interaction on gonadal condition and metamorphosis of male and female African clawed frog, Xenopus laevis

    Science.gov (United States)

    Sharma, Bibek; Patino, Reynaldo

    2010-01-01

    To assess interaction effects between cadmium (Cd, a putative xenoestrogen) and estradiol-17beta (E(2)) on sex differentiation and metamorphosis, Xenopus laevis were exposed to solvent-control (0.005% ethanol), Cd (10microgL(-1)), E(2) (1microgL(-1)), or Cd and E(2) (Cd+E(2)) in FETAX medium from fertilization to 75d postfertilization. Each treatment was applied to four aquaria, each with 30 fertilized eggs. Mortality was recorded and animals were sampled as they completed metamorphosis (Nieuwkoop and Faber stage 66). Gonadal sex of individuals (including >or= tadpoles NF stage 55 at day 75) was determined gross-morphologically and used to compute sex ratios. Time course and percent completion of metamorphosis, snout-vent length (SVL), hindlimb length (HLL) and weight were analyzed for each gender separately. Survival rates did not differ among treatments. The E(2) and Cd+E(2) treatments significantly skewed sex ratios towards females; however, no sex-ratio differences were observed between the control and Cd treatments or between the E(2) and Cd+E(2) treatments. Time course of metamorphosis was generally delayed and percent completion of metamorphosis was generally reduced in males and females exposed to Cd, E(2) or their combination compared to control animals. In males, but not females, the effect of Cd+E(2) was greater than that of individual chemicals. Weight at completion of metamorphosis was reduced only in females and only by the Cd+E(2) treatment. In conclusion, although Cd at an environmentally relevant concentration did not exhibit direct or indirect feminizing effects in Xenopus tadpoles, the metal and E(2) both had similar inhibitory effects on metamorphosis that were of greater magnitude in males than females.

  12. The growth of discs and bulges during hierarchical galaxy formation - I. Fast evolution versus secular processes

    Science.gov (United States)

    Tonini, C.; Mutch, S. J.; Croton, D. J.; Wyithe, J. S. B.

    2016-07-01

    We present a theoretical model for the evolution of mass, angular momentum and size of galaxy discs and bulges, and we implement it into the semi-analytic galaxy formation code, Semi-Analytic Galaxy Evolution. The model follows both secular and violent evolutionary channels, including smooth accretion, disc instabilities, minor and major mergers. We find that the combination of our recipe with hierarchical clustering produces two distinct populations of bulges: merger-driven bulges, akin to classical bulges and ellipticals, and instability-driven bulges, akin to secular (or pseudo-)bulges. The model mostly reproduces the mass-size relation of gaseous and stellar discs, the evolution of the mass-size relation of ellipticals, the Faber-Jackson relation, and the magnitude-colour diagram of classical and secular bulges. The model predicts only a small overlap of merger-driven and instability-driven components in the same galaxy, and predicts different bulge types as a function of galaxy mass and disc fraction. Bulge type also affects the star formation rate and colour at a given luminosity. The model predicts a population of merger-driven red ellipticals that dominate both the low-mass and high-mass ends of the galaxy population, and span all dynamical ages; merger-driven bulges in disc galaxies are dynamically old and do not interfere with subsequent evolution of the star-forming component. Instability-driven bulges dominate the population at intermediate galaxy masses, especially thriving in massive discs. The model green valley is exclusively populated by instability-driven bulge hosts. Through the present implementation, the mass accretion history is perceivable in the galaxy structure, morphology and colours.

  13. THE MOND LIMIT FROM SPACETIME SCALE INVARIANCE

    International Nuclear Information System (INIS)

    The modified Newtonian dynamics (MOND) limit is shown to follow from a requirement of spacetime scale invariance of the equations of motion for nonrelativistic, purely gravitational systems, i.e., invariance of the equations of motion under (t, r) → (λt, λr) in the limit a 0 → ∞. It is suggested that this should replace the definition of the MOND limit based on the low-acceleration behavior of a Newtonian-MOND interpolating function. In this way, the salient, deep-MOND results-asymptotically flat rotation curves, the mass-rotational-speed relation (baryonic Tully-Fisher relation), the Faber-Jackson relation, etc.,-follow from a symmetry principle. For example, asymptotic flatness of rotation curves reflects the fact that radii change under scaling, while velocities do not. I then comment on the interpretation of the deep-MOND limit as one of 'zero mass': rest masses, whose presence obstructs scaling symmetry, become negligible compared to the 'phantom', dynamical masses-those that some would attribute to dark matter. Unlike the former masses, the latter transform in a way that is consistent with the symmetry. Finally, I discuss the putative MOND-cosmology connection in light of another, previously known symmetry of the deep-MOND limit. In particular, it is suggested that MOND is related to the asymptotic de Sitter geometry of our universe. It is conjectured, for example that in an exact de Sitter cosmos, deep-MOND physics would exactly apply to local systems. I also point out, in this connection, the possible relevance of a de Sitter-conformal-field-theory (dS/CFT) duality.

  14. Study on Medium-range Order Structure in Liquid Al5Fe2 Alloy%Al5Fe2合金熔体中程有序结构的研究

    Institute of Scientific and Technical Information of China (English)

    丛红日; 边秀房; 李辉

    2002-01-01

    采用紧束缚原子间作用势,利用分子动力学模拟(MD)的方法研究了AlFe2合金熔体的微观结构,发现在结构因子的小角部分(Q=15.7 nm-1)出现了一个明显的预峰(FSDP),并得到X射线衍射实验的进一步印证.在实验测得的合金衍射图样中,液态衍射曲线与固态衍射曲线间存在着很好的对应关系,它们在小角部分都存在峰位,这表明Al5Fe2合金熔体与其固态在结构上存在着很大的相似性.通过对化学短程序参数α及Bhatis-homton(BT)结构因子的分析计算,发现熔体中存在较强的化学序,并认为正是这种化学序导致了中程有序结构(MRO)的产生.Faber-Ziman(FZ)偏结构因子的SFe-Fe(Q)和Sl-Fe(Q)在Q=15.7 nm-1处分别存在最大值与最小值,也是熔体中存在着超结构的表征.同时,我们还给出了体系的配位数及代表中程有序的原子团簇的结构模型.

  15. SPIDER - II. The Fundamental Plane of early-type galaxies in grizYJHK

    Science.gov (United States)

    La Barbera, F.; de Carvalho, R. R.; de La Rosa, I. G.; Lopes, P. A. A.

    2010-11-01

    We present a complete analysis of the Fundamental Plane (FP) of early-type galaxies (ETGs) in the nearby Universe (z e, as key factors in obtaining meaningful FP coefficients. Studying the Kormendy relation (KR) we find that its slope varies from g (3.44 +/- 0.04) through K (3.80 +/- 0.02) implying that smaller size ETGs have a larger ratio of optical to near-infrared (NIR) radii than galaxies with larger re. We also examine the Faber-Jackson (FJ) relation and find that its slope is similar for all wavebands, within the uncertainties, with a mean value of 0.198 +/- 0.007. Writing the FP equation as logre = alogσ0 + be + c, we find that the `a' varies from 1.38 +/- 0.02 in g to 1.55 +/- 0.02 in K, implying a 12 per cent variation across the grizYJHK wavelength baseline. The corresponding variation of `b' is negligible (b ~ 0.316), while `c' varies by ~10 per cent. We show that the waveband dependence of the FJ and KR results from the complex variation of the distribution of galaxies in the face-on projection of the FP as well as by the change of FP coefficients with waveband. We find that `a' and `b' become smaller for higher Sersic index and larger axial ratios, independent of the waveband. This suggests that these variations are likely to be related to differences in structural and dynamical (rather than stellar population) properties of ETGs. It is noticeable that galaxies with bluer colours and disc-like isophotes have smaller `b', with the effect decreasing smoothly from g through K. Considering a power-law relation between mass-to-light ratio and (dynamical) mass, M/L ~ Mγ, we estimate γ from the FP coefficients in grizYJHK. The γ decreases from 0.224 +/- 0.008 in g to 0.186 +/- 0.009 in K band. Using the γ values, we estimate the variation of age and metallicity of the stellar populations present in massive galaxies per decade in stellar mass. This analysis shows that in the NIR the tilt of the FP is not due to stellar population variation, and that ETGs

  16. Bias properties of extragalactic distance indicators. 3: Analysis of Tully-Fisher distances for the Mathewson-Ford-Buchhorn sample of 1355 galaxies

    Science.gov (United States)

    Federspiel, Martin; Sandage, Allan; Tammann, G. A.

    1994-01-01

    The observational selection bias properties of the large Mathewson-Ford-Buchhorn (MFB) sample of axies are demonstrated by showing that the apparent Hubble constant incorrectly increases outward when determined using Tully-Fisher (TF) photometric distances that are uncorreted for bias. It is further shown that the value of H(sub 0) so determined is also multivlaued at a given redshift when it is calculated by the TF method using galaxies with differenct line widths. The method of removing this unphysical contradiction is developed following the model of the bias set out in Paper II. The model developed further here shows that the appropriate TF magnitude of a galaxy that is drawn from a flux-limited catalog not only is a function of line width but, even in the most idealistic cases, requires a triple-entry correction depending on line width, apparent magnitude, and catalog limit. Using the distance-limited subset of the data, it is shown that the mean intrinsic dispersion of a bias-free TF relation is high. The dispersion depends on line width, decreasing from sigma(M) = 0.7 mag for galaxies with rotational velocities less than 100 km s(exp-1) to sigma(M) = 0.4 mag for galaxies with rotational velocities greater than 250 km s(exp-1). These dispersions are so large that the random errors of the bias-free TF distances are too gross to detect any peculiar motions of individual galaxies, but taken together the data show again the offset of 500 km s(exp-1) fond both by Dressler & Faber and by MFB for galaxies in the direction of the putative Great Attractor but described now in a different way. The maximum amplitude of the bulk streaming motion at the Local Group is approximately 500 km s(exp-1) but the perturbation dies out, approaching the Machian frame defined by the CMB at a distance of approximately 80 Mpc (v is approximately 4000 km s(exp -1)). This decay to zero perturbation at v is approximately 4000 km s(exp -1) argues against existing models with a single

  17. Quantification of numerical aperture-dependence of the OCT attenuation coefficient (Conference Presentation)

    Science.gov (United States)

    Peinado, Liliana M.; Bloemen, Paul R.; Almasian, Mitra; van Leeuwen, Ton G.; Faber, Dirk J.

    2016-03-01

    .1155/2011/825629. [3] Jung W and Boppart S. Optical coherence tomography for rapid tissue screening and directed histological sectioning. Anal Cell Pathol (Amst). 2012; 35(3): 129-143. [4] R. Wessels et al. Optical coherence tomography in vulvar intraepithelial neoplasia. J Biomed Opt 2012 Nov; 17(11): 116022. [5] Faber D, van der Meer F, Aalders M, van Leeuwen T. Quantitative measurement of attenuation coefficients of weakly scattering media using optical coherence tomography. OPT EXPRESS 2004; 12 (19): 4353-43. [6] Thrane L, Yura HT, and Andersen PE. Analysis of optical coherence tomography systems based on the extended Huygens-Fresnel principle. JOSA 2000; 17(3): 484-490.

  18. THE ROLE OF DRY MERGERS FOR THE FORMATION AND EVOLUTION OF BRIGHTEST CLUSTER GALAXIES

    International Nuclear Information System (INIS)

    Using a resimulation technique, we perform high-resolution cosmological simulations of dry mergers in a massive (1015 M sun) galaxy cluster identified in the Millennium Run. Our initial conditions include well resolved compound galaxy models consisting of dark matter halos and stellar bulges that are used to replace the most massive cluster progenitor halos at redshift z = 3, allowing us to follow the subsequent dry merger processes that build up the cluster galaxies in a self-consistent cosmological setting. By construction, our galaxy models obey the stellar mass-size relation initially. Also, we study both galaxy models with adiabatically contracted and uncompressed halos. We demonstrate that the brightest cluster galaxy (BCG) evolves away from the Kormendy relation as defined by the smaller mass galaxies (i.e., the relation bends). This is accompanied by a significantly faster dark matter mass growth within the half-light radius of the BCG compared to the increase in the stellar mass inside the same radius. As a result of the comparatively large number of mergers the BCG experiences, its total mass-to-light ratio becomes significantly higher than in typical elliptical galaxies. We also show that the mixing processes between dark matter and stars lead to a small but numerically robust tilt in the fundamental plane and that the BCG lies on the tilted plane. Our model is consistent with the observed steepening of the logarithmic mass-to-light gradient as a function of the stellar mass. As we have not included effects from gas dynamics or star formation, these trends are exclusively due to N-body and stellar dynamical effects. Surprisingly, we find only tentative weak distortion in the Faber-Jackson relation that depends on the aperture size, unlike expected based on studies of isolated merger simulations. This may be due to differences in the distribution of galaxy orbits, which is given in our approach directly by the cosmological context while it has to be

  19. 含椭圆刚性核有限大复合材料层板弯曲应力分析%Bending problem of a finite composite laminated plate with elliptical rigid inclusions

    Institute of Scientific and Technical Information of China (English)

    毛春见; 许希武; 郭树祥

    2016-01-01

    基于经典的复合材料层板理论,将有限大复合材料层板等效成各向异性弹性平板。采用复变函数理论中的Faber级数分析方法,使用最小二乘边界配点法,对含多椭圆刚性核有限大各向异性板弯曲问题进行应力分析,得到了该问题的级数解形式,分析了含椭圆刚性核层板在弯曲载荷下的应力分布,并讨论了形状和结构参数对应力分布的影响。结果表明,本文方法对于分析含多个椭圆形刚性核有限大薄板弯曲应力问题非常有效,该方法具有精度高及计算方便等优点。%Based on the classical composite laminate theory ,a finite composite plate weakened by multiple elliptical holes is treated as an anisotropic plate .Using the Faber series method in complex theory combined with the least squares boundary collocation techniques on the finite boundaries ,the bending problem of a finite composite plate weakened by elliptical rigid inclusions is studied by means of the complex variable method .As a result ,concise and high accuracy solutions are presented for the stress distribution around the rigid inclusions .Finally ,numerical examples are presented to discuss the effects of some parameters on the stress concentration around the rigid inclusions .The results showed that the present method is not only very efficient for analysis of the stress distribution of finite laminates with multiple elliptical rigid inclusions ,but also is highly accurate and needs short computer time .

  20. THE L{proportional_to}{sigma}{sup 8} CORRELATION FOR ELLIPTICAL GALAXIES WITH CORES: RELATION WITH BLACK HOLE MASS

    Energy Technology Data Exchange (ETDEWEB)

    Kormendy, John [Department of Astronomy, University of Texas at Austin, 2515 Speedway, Mail Stop C1400, Austin, Texas 78712-1205 (United States); Bender, Ralf, E-mail: kormendy@astro.as.utexas.edu, E-mail: bender@mpe.mpg.de [Universitaets-Sternwarte, Scheinerstrasse 1, D-81679 Muenchen (Germany)

    2013-05-20

    We construct the Faber-Jackson correlation between velocity dispersion {sigma} and total galaxy luminosity L{sub V} separately for elliptical galaxies with and without cores. The coreless ellipticals show the well-known, steep relationship dlog {sigma}/dlog L{sub V} = 0.268 or L{sub V} {proportional_to}{sigma}{sup 3.74}. This corresponds to dlog {sigma}/dlog M = 0.203, where M is the stellar mass and we use M/L{proportional_to}L {sup 0.32}. In contrast, the velocity dispersions of core ellipticals increase much more slowly with L{sub V} and M: dlog {sigma}/dlog L{sub V} = 0.120, L{sub V} {proportional_to}{sigma}{sup 8.33}, and dlog {sigma}/dlog M = 0.091. Dissipationless major galaxy mergers are expected to preserve {sigma} according to the simplest virial-theorem arguments. However, numerical simulations show that {sigma} increases slowly in dry major mergers, with dlog {sigma}/dlog M {approx_equal} +0.15. In contrast, minor mergers cause {sigma} to decrease, with dlog {sigma}/dlog M {approx_equal} -0.05. Thus, the observed relation argues for dry major mergers as the dominant growth mode of the most massive ellipticals. This is consistent with what we know about the formation of cores. We know no viable way to explain galaxy cores except through dissipationless mergers of approximately equal-mass galaxies followed by core scouring by binary supermassive black holes. The observed, shallow {sigma}{proportional_to}L{sub V}{sup +0.12} relation for core ellipticals provides further evidence that they formed in dissipationless and predominantly major mergers. Also, it explains the observation that the correlation of supermassive black hole mass with velocity dispersion, M{sub .}{proportional_to}{sigma}{sup 4}, ''saturates'' at high M{sub .} such that M{sub .} becomes almost independent of {sigma}.

  1. Assessment of adult hip dysplasia and the outcome of surgical treatment.

    Science.gov (United States)

    Troelsen, Anders

    2012-06-01

    Hip dysplasia and hip joint deformities in general are recognized as possible precursors of osteoarthritic development. Early and correct identification of hip dysplasia is important in order to offer timely joint preserving treatment. In the contemporary literature, several controversies exist, and some of these were the focus of this doctoral thesis. Categorized into subjects, the major findings and their possible importance are listed below. DIAGNOSTIC ASSESSMENT OF HIP DYSPLASIA: A multi-observer study quantified the variability of different methods for diagnostic assessment of hip dysplasia and osteoarthritis and resulted in general recommendations regarding diagnostic assessment of hip dysplasia. Pelvic tilt was shown to differ significantly between the supine and weight-bearing positions in patients with dysplastic hip joints. This is a finding that adds controversy to the application of neutral pelvic positioning during assessment of hip deformities because pelvic tilt affects the appearance of acetabular version. Weight-bearing assessment of acetabular version showed the presence of retroversion in 33% of dysplastic hips. The establishment of retroversion as a rather frequent entity in dysplastic hips is contradictory to the historical finding that hip dysplasia is characterized by insufficient anterior and lateral coverage. In general, the findings have important implications for orthopedic surgeons and radiologists dealing with diagnostic assessment of painful hips in young adults, and for surgeons planning and performing joint-preserving periacetabular osteotomies. ASSESSMENT OF ACETABULAR LABRAL TEARS IN HIP DYSPLASIA: The roles of ultrasound and clinical tests in acetabular labral tear diagnostics were established. After overcoming an initial learning curve, ultrasound investigation was highly reliable in diagnosing labral tears, whereas only a positive impingement or FABER test was reliable in identifying a labral tear. It seems that non-invasive and

  2. BRIGHTEST CLUSTER GALAXIES AT THE PRESENT EPOCH

    Energy Technology Data Exchange (ETDEWEB)

    Lauer, Tod R. [National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726 (United States); Postman, Marc [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Strauss, Michael A.; Graves, Genevieve J.; Chisari, Nora E. [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)

    2014-12-20

    We have obtained photometry and spectroscopy of 433 z ≤ 0.08 brightest cluster galaxies (BCGs) in a full-sky survey of Abell clusters to construct a BCG sample suitable for probing deviations from the local Hubble flow. The BCG Hubble diagram over 0 < z < 0.08 is consistent to within 2% of the Hubble relation specified by a Ω {sub m} = 0.3, Λ = 0.7 cosmology. This sample allows us to explore the structural and photometric properties of BCGs at the present epoch, their location in their hosting galaxy clusters, and the effects of the cluster environment on their structure and evolution. We revisit the L{sub m} -α relation for BCGs, which uses α, the log-slope of the BCG photometric curve of growth, to predict the metric luminosity in an aperture with 14.3 kpc radius, L{sub m} , for use as a distance indicator. Residuals in the relation are 0.27 mag rms. We measure central stellar velocity dispersions, σ, of the BCGs, finding the Faber-Jackson relation to flatten as the metric aperture grows to include an increasing fraction of the total BCG luminosity. A three-parameter ''metric plane'' relation using α and σ together gives the best prediction of L{sub m} , with 0.21 mag residuals. The distribution of projected spatial offsets, r{sub x} of BCGs from the X-ray-defined cluster center is a steep γ = –2.33 power law over 1 < r{sub x} < 10{sup 3} kpc. The median offset is ∼10 kpc, but ∼15% of the BCGs have r{sub x} > 100 kpc. The absolute cluster-dispersion normalized BCG peculiar velocity |ΔV {sub 1}|/σ {sub c} follows an exponential distribution with scale length 0.39 ± 0.03. Both L{sub m} and α increase with σ {sub c}. The α parameter is further moderated by both the spatial and velocity offset from the cluster center, with larger α correlated with the proximity of the BCG to the cluster mean velocity or potential center. At the same time, position in the cluster has little effect on L{sub m} . Likewise, residuals from

  3. BRIGHTEST CLUSTER GALAXIES AT THE PRESENT EPOCH

    International Nuclear Information System (INIS)

    We have obtained photometry and spectroscopy of 433 z ≤ 0.08 brightest cluster galaxies (BCGs) in a full-sky survey of Abell clusters to construct a BCG sample suitable for probing deviations from the local Hubble flow. The BCG Hubble diagram over 0 < z < 0.08 is consistent to within 2% of the Hubble relation specified by a Ω m = 0.3, Λ = 0.7 cosmology. This sample allows us to explore the structural and photometric properties of BCGs at the present epoch, their location in their hosting galaxy clusters, and the effects of the cluster environment on their structure and evolution. We revisit the Lm -α relation for BCGs, which uses α, the log-slope of the BCG photometric curve of growth, to predict the metric luminosity in an aperture with 14.3 kpc radius, Lm , for use as a distance indicator. Residuals in the relation are 0.27 mag rms. We measure central stellar velocity dispersions, σ, of the BCGs, finding the Faber-Jackson relation to flatten as the metric aperture grows to include an increasing fraction of the total BCG luminosity. A three-parameter ''metric plane'' relation using α and σ together gives the best prediction of Lm , with 0.21 mag residuals. The distribution of projected spatial offsets, rx of BCGs from the X-ray-defined cluster center is a steep γ = –2.33 power law over 1 < rx < 103 kpc. The median offset is ∼10 kpc, but ∼15% of the BCGs have rx > 100 kpc. The absolute cluster-dispersion normalized BCG peculiar velocity |ΔV 1|/σ c follows an exponential distribution with scale length 0.39 ± 0.03. Both Lm and α increase with σ c. The α parameter is further moderated by both the spatial and velocity offset from the cluster center, with larger α correlated with the proximity of the BCG to the cluster mean velocity or potential center. At the same time, position in the cluster has little effect on Lm . Likewise, residuals from the metric plane show no correlation with either the spatial or velocity

  4. Internal and environmental secular evolution of disk galaxies

    Science.gov (United States)

    Kormendy, John

    2015-03-01

    classical bulges, (2) correspondingly large ratios of ordered to random velocities, (3) small velocity dispersions σ with respect to the Faber-Jackson correlation between σ and bulge luminosity, (4) spiral structure or nuclear bars in the `bulge' part of the light profile, (5) nearly exponential brightness profiles and (6) starbursts. None of the above classification criteria are 100% reliable. Published disagreements on (pseudo)bulge classifications usually result from the use of diffferent criteria. It is very important to use as many classification criteria as possible. When two or more criteria are used, the probability of misclassification becomes very small. I also review environmental secular evolution - the transformation of gas-rich, star-forming spiral and irregular galaxies into gas-poor, `red and dead' S0 and spheroidal (`Sph') galaxies. I show that Sph galaxies such as NGC 205 and Draco are not the low-luminosity end of the structural sequence (the `fundamental plane') of elliptical galaxies. Instead, Sph galaxies have structural parameters like those of low-luminosity S+Im galaxies. Spheroidals are continuous in their structural parameters with the disks of S0 galaxies. They are bulgeless S0s. S+Im -> S0+Sph transformation involves a variety of internal (supernova-driven baryon ejection) and environmental processes (e.g., ram-pressure gas stripping, harassment, and starvation). Improved evidence for galaxy transformation is presented in several papers at this meeting.

  5. Secular Evolution in Disk Galaxies

    Science.gov (United States)

    Kormendy, John

    2013-10-01

    bulges because the latter retain a `memory' of their disky origin. That is, they have one or more characteristics of disks: (1) flatter shapes than those of classical bulges, (2) correspondingly large ratios of ordered to random velocities, (3) small velocity dispersions with respect to the Faber-Jackson correlation between velocity dispersion and bulge luminosity, (4) spiral structure or nuclear bars in the `bulge' part of the light profile, (5) nearly exponential brightness profiles and (6) starbursts. So the cleanest examples of pseudobulges are recognisable. However, pseudo and classical bulges can coexist in the same galaxy. I review two important implications of secular evolution: (1) The existence of pseudobulges highlights a problem with our theory of galaxy formation by hierarchical clustering. We cannot explain galaxies that are completely bulgeless. Galaxy mergers are expected to happen often enough so that every giant galaxy should have a classical bulge. But we observe that bulgeless giant galaxies are common in field environments. We now realise that many dense centres of galaxies that we used to think are bulges were not made by mergers; they were grown out of disks. So the challenge gets more difficult. This is the biggest problem faced by our theory of galaxy formation. (2) Pseudobulges are observed to contain supermassive black holes (BHs), but they do not show the well-known, tight correlations between BH mass and the mass and velocity dispersion of the host bulge. This leads to the suggestion that there are two fundamentally different BH feeding processes. Rapid global inward gas transport in galaxy mergers leads to giant BHs that correlate with host ellipticals and classical bulges, whereas local and more stochastic feeding of small BHs in largely bulgeless galaxies evidently involves too little energy feedback to result in BH-host coevolution. It is an important success of the secular evolution picture that morphological differences can be used to

  6. Book Reviews

    Directory of Open Access Journals (Sweden)

    Redactie KITLV

    2000-07-01

    : The Press University of the West Indies, 1998. xviii + 152 pp. -Kris Lane, Hans Turley, Rum, sodomy, and the lash: Piracy, sexuality, and masculine identity. New York: New York University Press, 1999. lx + 199 pp. -Jonathan Schorsch, Eli Faber, Jews, slaves, and the slave trade: Setting the record straight. New York: New York University Press, 1998. xvii + 367 pp. -Bonham C. Richardson, Bridget Brereton ,The Colonial Caribbean in transition: Essays on postemancipation social and cultural history. Barbados: The Press University of the West Indies; Gainesville: University Press of Florida, 1999. xxiii + 319 pp., Kevin A. Yelvington (eds -Ransford W. Palmer, Thomas Klak, Globalization and neoliberalism: The Caribbean context. New York: Rowman and Littlefield, 1998. xxiv + 319 pp. -Susan Saegert, Robert B. Potter ,Self-help housing, the poor, and the state in the Caribbean. Knoxville: University of Tennessee Press, 1997. xiv + 299 pp., Dennis Conway (eds -Peter Redfield, Michèle-Baj Strobel, Les gens de l'or: Mémoire des orpailleurs créoles du Maroni. Petit-Bourg, Guadeloupe: Ibis Rouge, 1998. 400 pp. -Donald R. Hill, Louis Regis, The political calypso: True opposition in Trinidad and Tobago 1962-1987. Gainesville: University Press of Florida, 1999. xv + 277 pp. -A. James Arnold, Christiane P. Makward, Mayotte Capécia ou l'aliénation selon Fanon. Paris: Karthala, 1999. 230 pp. -Chris Bongie, Celia M. Britton, Edouard Glissant and postcolonial theory: Strategies of language and resistance. Charlottesville: University Press of Virginia, 1999. xiv + 224 pp. -Chris Bongie, Anne Malena, The negotiated self: The dynamics of identity in Francophone Caribbean narrative. New York: Peter Lang, 1999. x + 192 pp. -Catherine A. John, Kathleen M. Balutansky ,Caribbean creolization: Reflections on the cultural dynamics of language, literature, and identity., Marie-Agnès Sourieau (eds -Leland Ferguson, Jay B. Haviser, African sites archaeology in the Caribbean. Princeton NJ: Markus

  7. Cognitive Outcomes for Congenital Hypothyroid and Healthy Children: A Comparative Study

    Directory of Open Access Journals (Sweden)

    Mahtab ORDOOEI

    2014-12-01

    etiology. Rev Med Inst Mex Seguro Soc 2011; 49:179-83. [Article in Spanish]Kik E, Noczyńska A. Evaluation of mental development of children with congenital hypothyroidism detected in screening test--personal observations. Pediatr Endocrinol Diabetes Metab 2010; 16:100-8. [Article in Polish]Arenz S, Nennstiel-Ratzel U, Wildner M, Dörr HG, Intellectual outcome, motor skills and BMI of children with congenital hypothyroidism: a population-based study. Acta Paediatr 2008; 97:447-50.Alvarez González MA, Carvajal Martínez F, Pérez Gesén C, Olivares Torres A, Fernández Yero JL, Robaina Alvarez R, et al. Prognosis of cognition in congenital hypothyroidism following early treatment. Double effect hypothesis. Rev Neurol 2004, 16-31; 38:513-7. [Article in Spanish]Boileau P, Bain P, Rives S, Toublanc JE. Earlier onset of treatment or increment in LT4 dose in screened congenital hypothyroidism: which as the more important factor for IQ at 7 years? Horm Res 2004; 61:228-33.Salerno M, Militerni R, Bravaccio C, Micillo M, Capalbo D, Di MS, Tenore A. Effect of different starting doses of levothyroxine on growth and intellectual outcome at four years of age in congenital hypothyroidism. Thyroid 2002; 12:45-52.Dimitropoulos A, Molinari L, Etter K, Torresani T, Lang- Muritano M, Jenni OG, Largo RH, Latal B. Children with congenital hypothyroidism: long-term intellectual outcome after early high-dose treatment. Pediatr Res 2009; 65:242-8.Joseph R. Neuro-developmental deficits in early-treated congenital hypothyroidism. Ann Acad Med Singapore 2008; 37(12 Suppl:42-3.Kempers MJ, van der Sluijs Veer L, Nijhuis-van der Sanden MW, Kooistra L, Wiedijk BM, Faber I, et al.Intellectual and motor development of young adults with congenital hypothyroidism diagnosed by neonatal screening. J Clin Endocrinol Metab2006; 91:418-24.Rovet JF. Children with congenital hypothyroidism and their siblings: do they really differ? Pediatrics 2005;115:e52-7.Kempers MJ, van der Sluijs Veer L, Nijhuis-van der

  8. The relationship between pelvis inclination, exercise and low back pain (LBP during pregnancy [Vztah mezi bolestí zad, sklonem pánve a vhodnou pohybovou aktivitou v těhotenství

    Directory of Open Access Journals (Sweden)

    Marcela Minaříková

    2011-09-01

    Full Text Available BACKGROUND: Pain in the lower region of the back and pelvis – also called "Low Back Pain" (LBP - is very frequent during pregnancy. According to many authors it is a major complaint of more than half of all pregnant women; it causes mental and physical discomfort. The etiology of LBP during pregnancy is still not fully known. OBJECTIVE: The main aim of our research was to objectify the relationship between the presence of LBP, the training level of the postural muscles and the degree of the pelvic inclination of women in the third trimester of pregnancy. That is why the relationship between pelvic inclination and LBP occurrence is compared within the context of two groups – reasonable physically active as compared to physically inactive women. METHODS: Twenty-seven pregnant probands aged 20 – 35 years and in the second half of their third trimester were included in the experiment. All of them complained of pain in their lumbar spine and in the pelvicarea. They were divided into two groups: 14 physically inactive women and 13 physically active women, who have been performing physical activity for at least 135 minutes per week for at least 1 year before conception and for at least 90 minutes per week during pregnancy. The exercises were focused on the functioning of the postural system, e.g. yoga, Pilatespilatek and exercises by Mojzisova. We measured the inclination of the pelvis (using non-invasive anthropometric measuring and observed the presence of pain in the selected area: clinically via the Patrick-Faber test and posterior pelvic pain provocation test and subjectively with the aid of a standardized LBP related survey. The statistical methods used were the t-test, the median and Wilcoxon-White test and the Spearman factor of serial correlations. RESULTS: We observed a statistically significant difference between the pelvic inclination of physically active and inactive women (using a t-test for non-pair values with a significance level