We still fail to account for Mendel's observations.

Science.gov (United States)

Porteous, John W

2004-08-16

The present article corrects common textbook accounts of Mendel's experiments by re-establishing what he wrote and how he accounted for his observations. It notes the long-established tests for the validity of any explanations that purport to explain observations obtained by experiment. Application of these tests to Mendel's paper shows that the arguments he used to explain his observations were internally consistent but were, on one crucial issue, implausible. The same tests are applied to the currently accepted explanation for Mendel's observations. The currently favoured explanation for Mendel's observations is untenable. It misrepresents Mendel, fails to distinguish between the parameters and the variables of any system of interacting components, its arguments are inconsistent, it repeats the implausibility in Mendel's paper, fails to give a rational explanation for his observed 3:1 trait ratio and cannot explain why this ratio is not always observed in experimental practice. A rational explanation for Mendel's observations is initiated. Readers are challenged to complete the process before a further article appears.

We still fail to account for Mendel's observations

Directory of Open Access Journals (Sweden)

Porteous John W

2004-08-01

Full Text Available Abstract Background The present article corrects common textbook accounts of Mendel's experiments by re-establishing what he wrote and how he accounted for his observations. It notes the long-established tests for the validity of any explanations that purport to explain observations obtained by experiment. Application of these tests to Mendel's paper shows that the arguments he used to explain his observations were internally consistent but were, on one crucial issue, implausible. The same tests are applied to the currently accepted explanation for Mendel's observations. Conclusions The currently favoured explanation for Mendel's observations is untenable. It misrepresents Mendel, fails to distinguish between the parameters and the variables of any system of interacting components, its arguments are inconsistent, it repeats the implausibility in Mendel's paper, fails to give a rational explanation for his observed 3:1 trait ratio and cannot explain why this ratio is not always observed in experimental practice. A rational explanation for Mendel's observations is initiated. Readers are challenged to complete the process before a further article appears.

The 1.5 meter solar telescope GREGOR

Science.gov (United States)

Schmidt, W.; von der Lühe, O.; Volkmer, R.; Denker, C.; Solanki, S. K.; Balthasar, H.; Bello Gonzalez, N.; Berkefeld, Th.; Collados, M.; Fischer, A.; Halbgewachs, C.; Heidecke, F.; Hofmann, A.; Kneer, F.; Lagg, A.; Nicklas, H.; Popow, E.; Puschmann, K. G.; Schmidt, D.; Sigwarth, M.; Sobotka, M.; Soltau, D.; Staude, J.; Strassmeier, K. G.; Waldmann , T. A.

2012-11-01

The 1.5 m telescope GREGOR opens a new window to the understanding of solar small-scale magnetism. The first light instrumentation includes the Gregor Fabry Pérot Interferometer (GFPI), a filter spectro-polarimeter for the visible wavelength range, the GRating Infrared Spectro-polarimeter (GRIS) and the Broad-Band Imager (BBI). The excellent performance of the first two instruments has already been demonstrated at the Vacuum Tower Telescope. GREGOR is Europe's largest solar telescope and number 3 in the world. Its all-reflective Gregory design provides a large wavelength coverage from the near UV up to at least 5 microns. The field of view has a diameter of 150 arcsec. GREGOR is equipped with a high-order adaptive optics system, with a subaperture size of 10 cm, and a deformable mirror with 256 actuators. The science goals are focused on, but not limited to, solar magnetism. GREGOR allows us to measure the emergence and disappearance of magnetic flux at the solar surface at spatial scales well below 100 km. Thanks to its spectro-polarimetric capabilities, GREGOR will measure the interaction between the plasma flows, different kinds of waves, and the magnetic field. This will foster our understanding of the processes that heat the chromosphere and the outer layers of the solar atmosphere. Observations of the surface magnetic field at very small spatial scales will shed light on the variability of the solar brightness.

A.N. Kolmogorov's defence of Mendelism

Directory of Open Access Journals (Sweden)

Alan Stark

2011-01-01

Full Text Available In 1939 N.I. Ermolaeva published the results of an experiment which repeated parts of Mendel's classical experiments. On the basis of her experiment she concluded that Mendel's principle that self-pollination of hybrid plants gave rise to segregation proportions 3:1 was false. The great probability theorist A.N. Kolmogorov reviewed Ermolaeva's data using a test, now referred to as Kolmogorov's, or Kolmogorov-Smirnov, test, which he had proposed in 1933. He found, contrary to Ermolaeva, that her results clearly confirmed Mendel's principle. This paper shows that there were methodological flaws in Kolmogorov's statistical analysis and presents a substantially adjusted approach, which confirms his conclusions. Some historical commentary on the Lysenko-era background is given, to illuminate the relationship of the disciplines of genetics and statistics in the struggle against the prevailing politically-correct pseudoscience in the Soviet Union. There is a Brazilian connection through the person of Th. Dobzhansky.

Crossing over...Markov meets Mendel.

Science.gov (United States)

Mneimneh, Saad

2012-01-01

Chromosomal crossover is a biological mechanism to combine parental traits. It is perhaps the first mechanism ever taught in any introductory biology class. The formulation of crossover, and resulting recombination, came about 100 years after Mendel's famous experiments. To a great extent, this formulation is consistent with the basic genetic findings of Mendel. More importantly, it provides a mathematical insight for his two laws (and corrects them). From a mathematical perspective, and while it retains similarities, genetic recombination guarantees diversity so that we do not rapidly converge to the same being. It is this diversity that made the study of biology possible. In particular, the problem of genetic mapping and linkage-one of the first efforts towards a computational approach to biology-relies heavily on the mathematical foundation of crossover and recombination. Nevertheless, as students we often overlook the mathematics of these phenomena. Emphasizing the mathematical aspect of Mendel's laws through crossover and recombination will prepare the students to make an early realization that biology, in addition to being experimental, IS a computational science. This can serve as a first step towards a broader curricular transformation in teaching biological sciences. I will show that a simple and modern treatment of Mendel's laws using a Markov chain will make this step possible, and it will only require basic college-level probability and calculus. My personal teaching experience confirms that students WANT to know Markov chains because they hear about them from bioinformaticists all the time. This entire exposition is based on three homework problems that I designed for a course in computational biology. A typical reader is, therefore, an instructional staff member or a student in a computational field (e.g., computer science, mathematics, statistics, computational biology, bioinformatics). However, other students may easily follow by omitting the

Limits of imagination: the 150th Anniversary of Mendel's Laws, and why Mendel failed to see the importance of his discovery for Darwin's theory of evolution.

Science.gov (United States)

Singh, Rama S

2015-09-01

Mendel is credited for discovering Laws of Heredity, but his work has come under criticism on three grounds: for possible falsification of data to fit his expectations, for getting undue credit for the laws of heredity without having ideas of segregation and independent assortment, and for being interested in the development of hybrids rather than in the laws of heredity. I present a brief review of these criticisms and conclude that Mendel deserved to be called the father of genetics even if he may not, and most likely did not, have clear ideas of segregation and particulate determiners as we know them now. I argue that neither Mendel understood the evolutionary significance of his findings for the problem of genetic variation, nor would Darwin have understood their significance had he read Mendel's paper. I argue that the limits to imagination, in both cases, came from their mental framework being shaped by existing paradigms-blending inheritance in the case of Darwin, hybrid development in the case of Mendel. Like Einstein, Darwin's natural selection was deterministic; like Niels Bohr, Mendel's Laws were probabilistic-based on random segregation of trait-determining "factors". Unlike Einstein who understood quantum mechanics, Darwin would have been at a loss with Mendel's paper with no guide to turn to. Geniuses in their imaginations are like heat-seeking missiles locked-in with their targets of deep interests and they generally see things in one dimension only. Imagination has limits; unaided imagination is like a bird without wings--it goes nowhere.

Crossing over...Markov meets Mendel.

Directory of Open Access Journals (Sweden)

Saad Mneimneh

Full Text Available Chromosomal crossover is a biological mechanism to combine parental traits. It is perhaps the first mechanism ever taught in any introductory biology class. The formulation of crossover, and resulting recombination, came about 100 years after Mendel's famous experiments. To a great extent, this formulation is consistent with the basic genetic findings of Mendel. More importantly, it provides a mathematical insight for his two laws (and corrects them. From a mathematical perspective, and while it retains similarities, genetic recombination guarantees diversity so that we do not rapidly converge to the same being. It is this diversity that made the study of biology possible. In particular, the problem of genetic mapping and linkage-one of the first efforts towards a computational approach to biology-relies heavily on the mathematical foundation of crossover and recombination. Nevertheless, as students we often overlook the mathematics of these phenomena. Emphasizing the mathematical aspect of Mendel's laws through crossover and recombination will prepare the students to make an early realization that biology, in addition to being experimental, IS a computational science. This can serve as a first step towards a broader curricular transformation in teaching biological sciences. I will show that a simple and modern treatment of Mendel's laws using a Markov chain will make this step possible, and it will only require basic college-level probability and calculus. My personal teaching experience confirms that students WANT to know Markov chains because they hear about them from bioinformaticists all the time. This entire exposition is based on three homework problems that I designed for a course in computational biology. A typical reader is, therefore, an instructional staff member or a student in a computational field (e.g., computer science, mathematics, statistics, computational biology, bioinformatics. However, other students may easily follow by

22nd International Conference on Soft Computing

CERN Document Server

2017-01-01

This proceeding book contains a collection of selected accepted papers of the Mendel conference held in Brno, Czech Republic in June 2016. The proceedings book contains three chapters which present recent advances in soft computing including intelligent image processing. The Mendel conference was established in 1995 and is named after the scientist and Augustinian priest Gregor J. Mendel who discovered the famous Laws of Heredity. The main aim of the conference is to create a regular possibility for students, academics and researchers to exchange ideas and novel research methods on a yearly basis.

EVALUATING CHAMBERLAIN'S, McGREGOR'S, AND McRAE'S ...

African Journals Online (AJOL)

2012-08-08

Aug 8, 2012 ... spine and base of skull radiographs which however have diagnostic challenges due to the complexity of the ... McGregor's and Mc Rae's using CT bone windows ... metastatic lesion were excluded from the study. RESULTS.

Kosambi and the Genetic Mapping Function

Indian Academy of Sciences (India)

Research Centre, Indian. Agricultural ... Gregor Johann Mendel discovered that segregation of simple traits in pea ... Cytology furnishes mechanism that the experimental evidence demands” .... practice, however, the existence of interference may cause over .... Morgan's mapping function of true additivity; incomplete inter-.

¿Fueron manipulados los datos de Mendel? (Argumentos en contra)

OpenAIRE

Márquez-Sánchez, Fidel; Sahagún-Castellanos, Jaime

2005-01-01

Se discuten las opiniones de varios autores sobre la crítica de R. A. Fisher al ajuste de los datos de Mendel a sus hipótesis sobre la herencia en varios caracteres del chícharo (Pisum sativum). Datos demasiado buenos para ser ciertos, se ha argumentado. Tres autores basan su alegato en la forma inadecuada en que Fisher empleó la prueba de ji-cuadrada para sugerir que Mendel falseó sus datos experimentales. Otro autor señala cómo debe interpretarse el uso de la ji-cuadrada, ya que cuando se u...

Mendel in Genetics Teaching: Some Contributions from History of Science and Articles for Teachers

Science.gov (United States)

El-Hani, Charbel N.

2015-01-01

School science descriptions about Mendel and his story are problematic because several statements that are controversial among historians of science are repeated over and over again as if they were established facts. Another problem is the neglect of other scientists working on inheritance in the second half of the nineteenth century, including Darwin, Spencer, Galton, Nägeli, Brooks, Weismann and de Vries, who paved the way for the reinterpretation of Mendel's work in 1900. These problems are often found in textbooks and are likely to be present in school science throughout the world. Here, we discuss the contributions that history of science and papers published in journals that target teachers may bring to improve how school science deals with Mendel and his contributions. Evidently the idea is not that school teachers could solve problems still under discussion in the historical literature. The point is, rather, that it is important to avoid treating Mendel's contributions as uncontroversial, mentioning, for instance, that there are ongoing debates on whether he proposed the laws named after him by appealing to invisible factors underlying phenotypic traits that are seen as the heritable potentials for those traits, and would in due time be known as genes. History of science can contribute to put the mythic Mendel into question in the science classroom, bringing school science closer to the controversies around the interpretation of his work.

Los guisantes mágicos de Darwin y Mendel

Directory of Open Access Journals (Sweden)

Galera, Andrés

2000-12-01

Full Text Available

Presently work analyzes the hereditary models proposed by Darwin and Mendel to explain the evolutionary history of the Earth. The comparison shows us two faced biological theories, governed, one, for the principle of the natural selection, the other for the mutation.

Confronting Science: The Dilemma of Genetic Testing.

Science.gov (United States)

Zallen, Doris T.

1997-01-01

Considers the opportunities and ethical issues involved in genetic testing. Reviews the history of genetics from the first discoveries of Gregor Mendel, through the spurious pseudo-science of eugenics, and up to the discovery of DNA by James Watson and Francis Crick. Explains how genetic tests are done. (MJP)

McGregor-Mayweather: het gevecht dat alle mediarecords zal verbreken

NARCIS (Netherlands)

René Foolen

De roddel domineert al maandenlang het nieuws en de echte vechtsportliefhebbers raken er maar niet over uitgesproken: een gevecht tussen MMA-vechter Conor McGregor en bokser Floyd Mayweather. Totaal ondenkbaar, want twee verschillende gevechtsdisciplines, maar tegelijkertijd ook heel logisch. Want

sTools - a data reduction pipeline for the GREGOR Fabry-Pérot Interferometer and the High-resolution Fast Imager at the GREGOR solar telescope

Science.gov (United States)

Kuckein, C.; Denker, C.; Verma, M.; Balthasar, H.; González Manrique, S. J.; Louis, R. E.; Diercke, A.

2017-10-01

A huge amount of data has been acquired with the GREGOR Fabry-Pérot Interferometer (GFPI), large-format facility cameras, and since 2016 with the High-resolution Fast Imager (HiFI). These data are processed in standardized procedures with the aim of providing science-ready data for the solar physics community. For this purpose, we have developed a user-friendly data reduction pipeline called ``sTools'' based on the Interactive Data Language (IDL) and licensed under creative commons license. The pipeline delivers reduced and image-reconstructed data with a minimum of user interaction. Furthermore, quick-look data are generated as well as a webpage with an overview of the observations and their statistics. All the processed data are stored online at the GREGOR GFPI and HiFI data archive of the Leibniz Institute for Astrophysics Potsdam (AIP). The principles of the pipeline are presented together with selected high-resolution spectral scans and images processed with sTools.

76 FR 41526 - Centennial Challenges 2011 Strong Tether Challenge

Science.gov (United States)

2011-07-14

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION [Notice (11-063)] Centennial Challenges 2011 Strong... scheduled and teams that wish to compete may register. Centennial Challenges is a program of prize... NASA Centennial Challenges Program please visit: http://www.nasa.gov/challenges . General questions and...

75 FR 47316 - Centennial Challenges 2010 Strong Tether Challenge

Science.gov (United States)

2010-08-05

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Centennial Challenges 2010 Strong Tether Challenge... teams that wish to compete may register. Centennial Challenges is a program of prize competitions to..., please visit: http://www.spaceward.org/elevator2010-ts . For general information on the NASA Centennial...

Rezension zu: Anja Gregor: Constructing Intersex. Intergeschlechtlichkeit als soziale Kategorie. Bielefeld: transcript Verlag 2015.

Directory of Open Access Journals (Sweden)

Anike Krämer

2016-09-01

Full Text Available Anja Gregor zeigt in ihrer Dissertation anhand von fünf narrativen Interviews mit intergeschlechtlichen Menschen, wie eine medizinische Zurichtung auf die Biographie, den Körper, aber auch auf die geschlechtliche Identität Einfluss nimmt. Damit verknüpft sie drei Kernbereiche der Soziologie: Biographie, Körper und Geschlecht. Im Zentrum stehen die (Re-Konstruktion der biographischen Erzählung und die Auseinandersetzung mit der Medizin als machtvoller Instanz im Diskurs. Anschließend an diese Analyse entwickelt Gregor ein vierstufiges Modell von Emanzipationsprozessen, welche das Coming In, Coming Out, Coming Off und Coming Clean umfassen.

78 FR 19742 - Centennial Challenges: 2014 Night Rover Challenge

Science.gov (United States)

2013-04-02

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION [Notice 13-032] Centennial Challenges: 2014 Night... Centennial Challenges 2014 Night Rover Challenge. SUMMARY: This notice is issued in accordance with 51 U.S.C.... Centennial Challenges is a program of prize competitions to stimulate innovation in technologies of interest...

Centennial Olive trees in Lebanon: a substantial patrimony

OpenAIRE

Chalak, L.; Malas, F.; Hamadeh, B.; Essalouh, Laila; Khadari, Bouchaib

2014-01-01

This study aimed to assess the centennial olive trees growing across Lebanon, with the perspective of conservation of the ancient germplasm. The survey indicated the existence of numerous centennial olive trees distributed in different agro-climatic areas, from 80 to 1350 meters altitude across the country. Centennial olives were found in large size orchards and scattered as well as in young orchards, road hedges and gardens for ornamental purposes. Yet, no reliable information...

Centennial of Flight Educational Outreach

Science.gov (United States)

McCarthy, Marianne (Technical Monitor); Miller, Susan (Technical Monitor); Vanderpool, Celia

2003-01-01

The Centennial of Flight Education Outreach project worked with community partners to disseminate NASA Education materials and the Centennial of Flight CD-ROM as a vehicle to increase national awareness of NASA's Aerospace Education products, services and programs. The Azimuth Education Foundation and the Ninety Nines, an International Women Pilots Association, Inc. were chartered to conduct education outreach to the formal and informal educational community. The Dryden Education Office supported the development of a training and information distribution program that established a national group of prepared Centennial of Flight Ambassadors, with a mission of community education outreach. These Ambassadors are members of the Ninety Nines and through the Azimuth Foundation, they assisted the AECC on the national level to promote and disseminate Centennial of Flight and other educational products. Our objectives were to explore partnership outreach growth opportunities with consortium efforts between organizations. This project directly responded to the highlights of NASA s Implementation Plan for Education. It was structured to network, involve the community, and provide a solid link to active educators and current students with NASA education information. Licensed female pilots who live and work in local communities across the nation carried the link. This partnership has been extremely gratifying to all of those Ninety-Nines involved, and they eagerly look forward to further work opportunities.

Centennial Challenges Program

Science.gov (United States)

Ortega, Sam; Eberly, Eric

2015-01-01

NASA's Centennial Challenges Program was initiated in 2005 to directly engage the public in the process of advanced technology development. The program offers incentive prizes to generate revolutionary solutions to problems of interest to NASA and the nation. The program seeks innovations from diverse and nontraditional sources. Competitors are not supported by government funding and awards are only made to successful teams when the challenges are met. In keeping with the spirit of the Wright Brothers and other American innovators, the Centennial Challenge prizes are offered to independent inventors including small businesses, student groups, and individuals. These independent inventors are sought to generate innovative solutions for technical problems of interest to NASA and the nation and to provide them with the opportunity to stimulate or create new business ventures.

The Relevance of History of Biology to Teaching and Learning in the Life Sciences: The Case of Mendel's Laws

Science.gov (United States)

Dagher, Zoubeida R.

2014-01-01

Using Mendel's laws as a case in point, the purpose of this paper is to bring historical and philosophical perspectives together to help students understand science as a human endeavor. Three questions as addressed: (1) how did the Mendelian scheme, principles, or facts become labeled as laws, (2) to what extent do Mendel's laws exhibit…

77 FR 70835 - Centennial Challenges 2013 Sample Return Robot Challenge

Science.gov (United States)

2012-11-27

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Centennial Challenges 2013 Sample Return Robot... Challenge is scheduled and teams that wish to compete may register. Centennial Challenges is a program of... Challenge, please visit: http://challenge.wpi.edu . For general information on the NASA Centennial...

78 FR 49296 - Centennial Challenges 2014 Sample Return Robot Challenge

Science.gov (United States)

2013-08-13

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION [Notice 13-093] Centennial Challenges 2014 Sample... Centennial Challenges 2014 Sample Return Robot Challenge. SUMMARY: This notice is issued in accordance with... compete may register. Centennial Challenges is a program of prize competitions to stimulate innovation in...

76 FR 56819 - Centennial Challenges 2012 Sample Return Robot Challenge

Science.gov (United States)

2011-09-14

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION [Notice (11-079)] Centennial Challenges 2012 Sample... Challenge is scheduled and teams that wish to compete may register. Centennial Challenges is a program of... Challenge, please visit: http://wp.wpi.edu/challenge/ . For general information on the NASA Centennial...

Gregor Mendel's Genetic Experiments: A Statistical Analysis after 150 Years

Czech Academy of Sciences Publication Activity Database

Kalina, Jan

2016-01-01

Roč. 12, č. 2 (2016), s. 20-26 ISSN 1801-5603 Institutional support: RVO:67985807 Keywords : genetics * history of science * biostatistics * design of experiments Subject RIV: BB - Applied Statistics, Operational Research

75 FR 21044 - Notice of Centennial Challenges 2011 CAFE Green Flight Challenge

Science.gov (United States)

2010-04-22

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION [Notice (10-045)] Notice of Centennial Challenges...: Notice of Centennial Challenges 2011 CAFE Green Flight Challenge. SUMMARY: This notice is issued in... to compete may register. Centennial Challenges is a program of prize competitions to stimulate...

Celebrating Lady Liberty's Centennial.

Science.gov (United States)

Fowler, Charles B.

1986-01-01

The year 1986 marks the one hundredth birthday of the Statue of Liberty. The centennial provides an appropriate occasion for musical celebration. A list of musical compositions that teachers can use are provided. Difficulty level is indicated. (RM)

Statistics is not enough: revisiting Ronald A. Fisher's critique (1936) of Mendel's experimental results (1866).

Science.gov (United States)

Pilpel, Avital

2007-09-01

This paper is concerned with the role of rational belief change theory in the philosophical understanding of experimental error. Today, philosophers seek insight about error in the investigation of specific experiments, rather than in general theories. Nevertheless, rational belief change theory adds to our understanding of just such cases: R. A. Fisher's criticism of Mendel's experiments being a case in point. After an historical introduction, the main part of this paper investigates Fisher's paper from the point of view of rational belief change theory: what changes of belief about Mendel's experiment does Fisher go through and with what justification. It leads to surprising insights about what Fisher had done right and wrong, and, more generally, about the limits of statistical methods in detecting error.

Mendel and the Path to Genetics: Portraying Science as a Social Process

Science.gov (United States)

Kampourakis, Kostas

2013-01-01

Textbook descriptions of the foundations of Genetics give the impression that besides Mendel's no other research on heredity took place during the nineteenth century. However, the publication of the "Origin of Species" in 1859, and the criticism that it received, placed the study of heredity at the centre of biological thought. Consequently,…

Waste-to-Energy Cogeneration Project, Centennial Park

Energy Technology Data Exchange (ETDEWEB)

Johnson, Clay; Mandon, Jim; DeGiulio, Thomas; Baker, Ryan

2014-04-29

The Waste-to-Energy Cogeneration Project at Centennial Park has allowed methane from the closed Centennial landfill to export excess power into the the local utility’s electric grid for resale. This project is part of a greater brownfield reclamation project to the benefit of the residents of Munster and the general public. Installation of a gas-to-electric generator and waste-heat conversion unit take methane byproduct and convert it into electricity at the rate of about 103,500 Mwh/year for resale to the local utility. The sale of the electricity will be used to reduce operating budgets by covering the expenses for streetlights and utility bills. The benefits of such a project are not simply financial. Munster’s Waste-to Energy Cogeneration Project at Centennial Park will reduce the community’s carbon footprint in an amount equivalent to removing 1,100 cars from our roads, conserving enough electricity to power 720 homes, planting 1,200 acres of trees, or recycling 2,000 tons of waste instead of sending it to a landfill.

78 FR 59974 - Centennial Challenges 2014 Unmanned Aircraft Systems (UAS) Airspace Operations Challenge (AOC)

Science.gov (United States)

2013-09-30

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Centennial Challenges 2014 Unmanned Aircraft Systems... wish to compete may now register. Centennial Challenges is a program of prize competitions to stimulate...: http://www.uasaoc.org For general information on the NASA Centennial Challenges Program please visit...

78 FR 64500 - World War One Centennial Commission; Notification of Upcoming Public Advisory Meeting

Science.gov (United States)

2013-10-29

... One Centennial Commission; Notification of Upcoming Public Advisory Meeting AGENCY: World War One Centennial Commission. ACTION: Meeting notice. SUMMARY: Notice of this meeting is being provided according to... the schedule and agenda for the November 15, 2013, meeting of the World War One Centennial Commission...

Legumes’ contributions to genetic research, a historical perspective from Mendelism up to massive sequencing

Directory of Open Access Journals (Sweden)

Pérez de la Vega, Marcelino

2016-06-01

Full Text Available It is well known that Mendel chose peas as the study material for his experiments that are the cornerstone of genetics. Nonetheless, it is less known that he also experimented with other legumes although with reduced success, or that Darwin also experimented with legumes. During the first decade of the twentieth century, peas were the favorite material used to verify Mendel’s results. Although genetics after that time primarily developed using other eukaryotic organisms or microorganisms, legumes pertain to the core material that allowed Vavilov to develop his Law of Homologous Series in Variation. They have also been used as a model to study plant-microbe symbiotic relationships that enable the fixation of atmospheric nitrogen, making them one of the biological models of the genomic age. Over the last five years, several genome sequences of cultivated legume species have been published, with many more to be made public in the upcoming years. Consequently, the amount of theoretical knowledge accumulating in this area and its application in plant breeding are increasing exponentially.Es conocido que Mendel escogió los guisantes como material para realizar los experimentos que son la piedra fundacional de la Genética. Pero es menos conocido que Mendel también experimentó con otras leguminosas con menos éxito, o que Darwin experimentó con leguminosas. Durante la primera década del siglo XX, los guisantes fueron el material predilecto para comprobar los resultados obtenidos por Mendel. Después, la Genética se desarrolló utilizando prioritariamente otros organismos eucariotas o microorganismos. Aun así, las leguminosas forman parte de los materiales en los que Vavilov se basó para desarrollar su Ley de las Series Homólogas en la Variación. Las leguminosas son el modelo para el estudio de las relaciones simbióticas planta-microorganismo que posibilitan la fijación de nitrógeno atmosférico. Esto las ha convertido en uno de los

The project of installing a ZIMPOL_3 polarimeter at GREGOR in Tenerife

OpenAIRE

Michele Bianda; Renzo Ramelli; Jan Olof Stenflo; Svetlana Berdyugina; Daniel Gisler; Ivan Defilippis; Nazaret Bello Gonzáles

2013-01-01

A project of collaboration between Kiepenheuer Institut für Sonnenphysik KIS and Istituto Ricerche Solari Locarno IRSOL includes the installation of a ZIMPOL_3 high resolution polarimeter at the 1.5 meter aperture solar telescope GREGOR in Tenerife. Important scientific topics are expected to be investigated in particular in the case of events showing faint amplitude polarization signatures like scattering polarization effects and the Hanle effect. This project has also a technical importance...

Karlin–McGregor-like formula in a simple time-inhomogeneous birth–death process

International Nuclear Information System (INIS)

Ohkubo, Jun

2014-01-01

Algebraic discussions are developed to derive transition probabilities for a simple time-inhomogeneous birth–death process. Algebraic probability theory and Lie algebraic treatments make it easy to treat the time-inhomogeneous cases. As a result, an expression based on the Charlier polynomials is obtained, which can be considered as an extension of a famous Karlin–McGregor representation for a time-homogeneous birth–death process. (paper)

A retrospective of the GREGOR solar telescope in scientific literature

Science.gov (United States)

Denker, C.; von der Lühe, O.; Feller, A.; Arlt, K.; Balthasar, H.; Bauer, S.-M.; Bello González, N.; Berkefeld, Th.; Caligari, P.; Collados, M.; Fischer, A.; Granzer, T.; Hahn, T.; Halbgewachs, C.; Heidecke, F.; Hofmann, A.; Kentischer, T.; Klva{ňa, M.; Kneer, F.; Lagg, A.; Nicklas, H.; Popow, E.; Puschmann, K. G.; Rendtel, J.; Schmidt, D.; Schmidt, W.; Sobotka, M.; Solanki, S. K.; Soltau, D.; Staude, J.; Strassmeier, K. G.; Volkmer, R.; Waldmann, T.; Wiehr, E.; Wittmann, A. D.; Woche, M.

2012-11-01

In this review, we look back upon the literature, which had the GREGOR solar telescope project as its subject including science cases, telescope subsystems, and post-focus instruments. The articles date back to the year 2000, when the initial concepts for a new solar telescope on Tenerife were first presented at scientific meetings. This comprehensive bibliography contains literature until the year 2012, i.e., the final stages of commissioning and science verification. Taking stock of the various publications in peer-reviewed journals and conference proceedings also provides the ``historical'' context for the reference articles in this special issue of Astronomische Nachrichten/Astronomical Notes.

Mendel in Genetics Teaching: Some Contributions from History of Science and Articles for Teachers

Science.gov (United States)

El-Hani, Charbel N.

2015-01-01

School science descriptions about Mendel and his story are problematic because several statements that are controversial among historians of science are repeated over and over again as if they were established facts. Another problem is the neglect of other scientists working on inheritance in the second half of the nineteenth century, including…

77 FR 60619 - Removal of Obsolete Regulation: Use of the Centennial of Flight Commission Name

Science.gov (United States)

2012-10-04

... Removal of Obsolete Regulation: Use of the Centennial of Flight Commission Name AGENCY: National... section 1204. 506 entitled ``Delegation of Authority to License the Use of the Centennial of Flight Commission Name.'' Section 506, Delegation of Authority to License the Use of the Centennial of Flight...

Corrección a una equivocación de Karl Pearson (1904: la suma de fracciones de Mendel no produce acoplamientos genéticos incompletos

Directory of Open Access Journals (Sweden)

Conrado Ruiz Hernández

2014-01-01

Full Text Available A comienzos del siglo xx, matemáticos prominentes encontraron una conexión entre el binomio de Newton y las leyes de Mendel con el objetivo de proyectarla a poblaciones enteras considerando a descendientes de varias generaciones. Dentro de esta búsqueda, en 1904 Karl Pearson formuló objeciones sobre los preceptos de Mendel, en particular respecto a los descendientes puros (dominantes y recesivos, que provienen de progenitores híbridos que a su parecer se constituyen en acoplamientos genéticos incompletos, resultado de la suma de fracciones. Se realiza el análisis matemático de este algoritmo (considerando el contexto biológico de su aplicación y se concluye que los descendientes puros previstos en las leyes de Mendel son acoplamientos genéticos completos.

The cold war context of the golden jubilee, or, why we think of mendel as the father of genetics.

Science.gov (United States)

Wolfe, Audra J

2012-01-01

In September 1950, the Genetics Society of America (GSA) dedicated its annual meeting to a "Golden Jubilee of Genetics" that celebrated the 50th anniversary of the rediscovery of Mendel's work. This program, originally intended as a small ceremony attached to the coattails of the American Institute of Biological Sciences (AIBS) meeting, turned into a publicity juggernaut that generated coverage on Mendel and the accomplishments of Western genetics in countless newspapers and radio broadcasts. The Golden Jubilee merits historical attention as both an intriguing instance of scientific commemoration and as an early example of Cold War political theatre. Instead of condemning either Lysenko or Soviet genetics, the Golden Jubilee would celebrate Mendel - and, not coincidentally, the practical achievements in plant and animal breeding his work had made possible. The American geneticists' focus on the achievements of Western genetics as both practical and theoretical, international, and, above all, non-ideological and non-controversial, was fully intended to demonstrate the success of the Western model of science to both the American public and scientists abroad at a key transition point in the Cold War. An implicit part of this article's argument, therefore, is the pervasive impact of the Cold War in unanticipated corners of postwar scientific culture.

Veritas temporis filia est: Truth is the daughter of time

Directory of Open Access Journals (Sweden)

Pržulj Novo

2016-01-01

Full Text Available In 1865, Gregor Mendel presented the lectures 'Experiments in Plant Hybridization' concerning his results from cross-breeding experiments with different types of garden pea, performed in his monastery garden in Brno. Mendel studied easily observed pairs of opposite traits, such as purple or white flower, and discovered dominant and recessive traits. He concluded that parents pass separate and distinct factors (today called genes on to their offspring that are responsible for inherited traits. However, the scientific community did not understand that; indeed it was the beginning of what becomes genetics. The lectures published in 1866, Mendel sent to more than 30 biologists across Europe, but almost no one commented them. In the next 35 years, these papers were only three times cited. The genetics became more important at the beginning of the 20th century, when three different research groups (Hugo de Vries, Carl Erich Correns and Erich von Tschermak with their co-workers independently re-discovered Mendel's Laws of inheritance. However, as soon as the work was rediscovered, it created controversy. The closeness of Mendel's experimental observations to those predicted by his theories has led to numerous articles and ongoing debate about whether the data could have been obtained in the published form without some falsification. There have been many plausible arguments made for and against this view by a range of eminent geneticists and statisticians. Some have gone so far, as to suggest that the theories ensued from Mendel's two laws were not even correctly formulated in his original paper. The strongest supporters of Mendel's theory became biologist William Bateson and zoologist and geneticist Thomas Hunt Morgan. Morgan argued that genes are located on chromosomes and that the cells chromosomes hold the actual hereditary material, thus created what is now known as classical genetics. For his discovery concerning the role play by the chromosome in

Centennials: The World Is Waiting!

Science.gov (United States)

Housand, Angela

2016-01-01

Today's youth are connected across the street and across the globe in a web of communication like no other generation before. Generation Z, also known as Centennials, are considered "mobile-natives" and are even more technologically savvy then their Millennial predecessors. Nearly three-quarters of children own or have access to a…

The Mendel Formation: Evidence for Late Miocene climatic cyclicity at the northern tip of the Antarctic Peninsula

Czech Academy of Sciences Publication Activity Database

Nývlt, D.; Košler, J.; Mlčoch, B.; Mixa, P.; Lisá, Lenka; Bubík, M.; Hendriks, B. W. H.

2011-01-01

Roč. 299, 1/2 (2011), s. 363-384 ISSN 0031-0182 Institutional research plan: CEZ:AV0Z30130516 Keywords : Mendel Formation * Late Miocene * chmate * Antarctic Peninsula Subject RIV: DB - Geology ; Mineralogy Impact factor: 2.392, year: 2011

Primeiro registro de Oligonychus yothersi (McGregor (Acari: Tetranychidae em Eucalyptus grandis Hill ex Maiden no Brasil First record of Oligonychus yothersi (McGregor (Acari: Tetranychidae on Eucalyptus grandis Hill ex Maiden in Brazil

Directory of Open Access Journals (Sweden)

Fabrício Fagundes Pereira

2005-08-01

Full Text Available Relata-se a infestação de um ácaro-vermelho em mudas clonais de Eucalyptus grandis Hill ex Maiden, mantidas em casa de vegetação no município de Martinho Campos, Minas Gerais. O ácaro foi observado na parte superior das folhas que exibiam sinais de sucção de seiva e bronzeamento. Essas injúrias causaram desenvolvimento anormal e morte de plantas. O ácaro foi identificado como Oligonychus yothersi (McGregor (Acari: Tetranychidae, e isso representa o primeiro registro dessa espécie em mudas clonais de E. grandis no Brasil.An infestation of the red spider mite was reported in clone seedlings of Eucalyptus grandis Hill ex Maiden under greenhouse conditions, in the municipality of Martinho Campos, Minas Gerais State. The spider mite was found on the leaf upper faces with signs of sap suction and bronzing. Such injuries caused abnormal development and plant death. The spider mite was identified as Oligonychus yothersi (McGregor (Acari: Tetranychidae. This is the first record of O. yothersi on E. grandis seedlings in Brazil.

75 FR 15611 - Safety Zone; United Portuguese SES Centennial Festa, San Diego Bay, San Diego, CA

Science.gov (United States)

2010-03-30

...-AA00 Safety Zone; United Portuguese SES Centennial Festa, San Diego Bay, San Diego, CA AGENCY: Coast... navigable waters of the San Diego Bay in support of the United Portuguese SES Centennial Festa. This... Centennial Festa, which will include a fireworks presentation originating from a tug and barge combination in...

The "Mendel syndrome" in science: durability of scientific literature and its effects on bibliometric analysis of individual scientists.

Science.gov (United States)

Costas, Rodrigo; van Leeuwen, Thed N; van Raan, Anthony F J

2011-10-01

The obsolescence and "durability" of scientific literature have been important elements of debate during many years, especially regarding the proper calculation of bibliometric indicators. The effects of "delayed recognition" on impact indicators have importance and are of interest not only to bibliometricians but also among research managers and scientists themselves. It has been suggested that the "Mendel syndrome" is a potential drawback when assessing individual researchers through impact measures. If publications from particular researchers need more time than "normal" to be properly acknowledged by their colleagues, the impact of these researchers may be underestimated with common citation windows. In this paper, we answer the question whether the bibliometric indicators for scientists can be significantly affected by the Mendel syndrome. Applying a methodology developed previously for the classification of papers according to their durability (Costas et al., J Am Soc Inf Sci Technol 61(8):1564-1581, 2010a; J Am Soc Inf Sci Technol 61(2):329-339, 2010b), the scientific production of 1,064 researchers working at the Spanish Council for Scientific Research (CSIC) in three different research areas has been analyzed. Cases of potential "Mendel syndrome" are rarely found among researchers and these cases do not significantly outperform the impact of researchers with a standard pattern of reception in their citations. The analysis of durability could be included as a parameter for the consideration of the citation windows used in the bibliometric analysis of individuals.

The Challenge of Centennial Earthquakes to Improve Modern Earthquake Engineering

International Nuclear Information System (INIS)

Saragoni, G. Rodolfo

2008-01-01

The recent commemoration of the centennial of the San Francisco and Valparaiso 1906 earthquakes has given the opportunity to reanalyze their damages from modern earthquake engineering perspective. These two earthquakes plus Messina Reggio Calabria 1908 had a strong impact in the birth and developing of earthquake engineering. The study of the seismic performance of some up today existing buildings, that survive centennial earthquakes, represent a challenge to better understand the limitations of our in use earthquake design methods. Only Valparaiso 1906 earthquake, of the three considered centennial earthquakes, has been repeated again as the Central Chile, 1985, Ms = 7.8 earthquake. In this paper a comparative study of the damage produced by 1906 and 1985 Valparaiso earthquakes is done in the neighborhood of Valparaiso harbor. In this study the only three centennial buildings of 3 stories that survived both earthquakes almost undamaged were identified. Since for 1985 earthquake accelerogram at El Almendral soil conditions as well as in rock were recoded, the vulnerability analysis of these building is done considering instrumental measurements of the demand. The study concludes that good performance of these buildings in the epicentral zone of large earthquakes can not be well explained by modern earthquake engineering methods. Therefore, it is recommended to use in the future of more suitable instrumental parameters, such as the destructiveness potential factor, to describe earthquake demand

The Karlin-McGregor formula for a variant of a discrete version of Walsh's spider

International Nuclear Information System (INIS)

Gruenbaum, F Alberto

2009-01-01

We consider a variant of a discrete space version of Walsh's spider, see Walsh (1978 Temps Locaux, Asterisque vol 52-53 (Paris: Soc. Math. de France)) as well as Evans and Sowers (2003 Ann. Probab. 31 486-527 and its references). This process can be seen as an instance of a quasi-birth-and-death process, a class of random walks for which the classical theory of Karlin and McGregor can be nicely adapted as in Dette, Reuther, Studden and Zygmunt (2006 SIAM J. Matrix Anal. Appl. 29 117-42), Gruenbaum (2007 Probability, Geometry and Integrable Systems ed Pinsky and Birnir vol 55 (Berkeley, CA: MSRI publication) pp. 241-60, see also arXiv math PR/0703375), Gruenbaum (2007 Dagstuhl Seminar Proc. 07461 on Numerical Methods in Structured Markov Chains ed Bini), Gruenbaum (2008 Proceedings of IWOTA) and Gruenbaum and de la Iglesia (2008 SIAM J. Matrix Anal. Appl. 30 741-63). We give here a weight matrix that makes the corresponding matrix-valued orthogonal polynomials orthogonal to each other. We also determine the polynomials themselves and thus obtain all the ingredients to apply a matrix-valued version of the Karlin-McGregor formula.

76 FR 1386 - Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA

Science.gov (United States)

2011-01-10

...-AA00 Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA AGENCY: Coast... zone on the navigable waters of San Diego Bay in San Diego, CA in support of the Centennial of Naval... February 12, 2010, the Centennial of Naval Aviation Kickoff will take place in San Diego Bay. In support of...

NASA aircraft technician Donte Warren completes placement of the first official U.S. Centennial of F

Science.gov (United States)

2002-01-01

NASA aircraft technician Donte Warren completes placement of the first official U.S. Centennial of Flight Commission logo on an aircraft. The honored recipient is NASA Dryden Flight Research Center's Active Aeroelastic Wing (AAW) F/A-18 research aircraft, which is poised to begin wing-warping research flights harkening back to the Wright brothers. The Centennial of Flight Commission was created by the U.S.Congress in 1999 to serve as a national and international source of information about activities to commemorate the centennial of the Wright Brothers' first powered flight on the sands of Kitty Hawk, North Carolina, on December 17, 1903. Centennial activities are scheduled for 2003 in both North Carolina and Dayton, Ohio, home of the Wrights. In addition to these celebrations, numerous historical and educational projects are anticipated on the subject of aviation and aeronautics that will be an important legacy of the centennial of powered flight.

NASA aircraft technician Don Herman completes placement of the first official U.S. Centennial of Fli

Science.gov (United States)

2002-01-01

NASA aircraft technician Don Herman completes placement of the first official U.S. Centennial of Flight Commission logo on an aircraft. The honored recipient is NASA Dryden Flight Research Center's Active Aeroelastic Wing (AAW) F/A-18 research aircraft, which is poised to begin wing-warping research flights harkening back to the Wright brothers. The Centennial of Flight Commission was created by the U.S.Congress in 1999 to serve as a national and international source of information about activities to commemorate the centennial of the Wright Brothers' first powered flight on the sands of Kitty Hawk, North Carolina, on December 17, 1903. Centennial activities are scheduled for 2003 in both North Carolina and Dayton, Ohio, home of the Wrights. In addition to these celebrations, numerous historical and educational projects are anticipated on the subject of aviation and aeronautics that will be an important legacy of the centennial of powered flight.

CONAGT's place in ASME's centennial year

International Nuclear Information System (INIS)

Miller, W.H. Jr.

1985-01-01

A status report on ASME's Committee on Nuclear Air and Gas Treatment (CONAGT) is presented. This year ASME celebrates its centennial while CONAGT issues its first code sections covering fans, blowers, and refrigeration equipment. Significant code related CONAGT activities are covered as well as an explanation of CONAGT's place in the ASME organization

GREGOR Fabry-Pérot interferometer and its companion the blue imaging solar spectrometer

Science.gov (United States)

Puschmann, Klaus G.; Denker, Carsten; Balthasar, Horst; Louis, Rohan E.; Popow, Emil; Woche, Manfred; Beck, Christian; Seelemann, Thomas; Volkmer, Reiner

2013-08-01

The GREGOR Fabry-Pérot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-m GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain. The GFPI allows fast narrow-band imaging and postfactum image restoration. The retrieved physical parameters will be a fundamental building block for understanding the dynamic sun and its magnetic field at spatial scales down to ˜50 km on the solar surface. The GFPI is a tunable dual-etalon system in a collimated mounting. It is designed for spectrometric and spectropolarimetric observations between 530-860 nm and 580-660 nm, respectively, and possesses a theoretical spectral resolution of R≈250,000. Large-format, high-cadence charged coupled device detectors with sophisticated computer hard- and software enable the scanning of spectral lines in time-spans equivalent to the evolution time of solar features. The field-of-view (FOV) of 50″×38″ covers a significant fraction of the typical area of active regions in the spectroscopic mode. In case of Stokes-vector spectropolarimetry, the FOV reduces to 25″×38″. The main characteristics of the GFPI including advanced and automated calibration and observing procedures are presented. Improvements in the optical design of the instrument are discussed and first observational results are shown. Finally, the first concrete ideas for the integration of a second FPI, the blue imaging solar spectrometer, are laid out, which will explore the blue spectral region below 530 nm.

Evolution of Genetic Techniques: Past, Present, and Beyond

Directory of Open Access Journals (Sweden)

Asude Alpman Durmaz

2015-01-01

Full Text Available Genetics is the study of heredity, which means the study of genes and factors related to all aspects of genes. The scientific history of genetics began with the works of Gregor Mendel in the mid-19th century. Prior to Mendel, genetics was primarily theoretical whilst, after Mendel, the science of genetics was broadened to include experimental genetics. Developments in all fields of genetics and genetic technology in the first half of the 20th century provided a basis for the later developments. In the second half of the 20th century, the molecular background of genetics has become more understandable. Rapid technological advancements, followed by the completion of Human Genome Project, have contributed a great deal to the knowledge of genetic factors and their impact on human life and diseases. Currently, more than 1800 disease genes have been identified, more than 2000 genetic tests have become available, and in conjunction with this at least 350 biotechnology-based products have been released onto the market. Novel technologies, particularly next generation sequencing, have dramatically accelerated the pace of biological research, while at the same time increasing expectations. In this paper, a brief summary of genetic history with short explanations of most popular genetic techniques is given.

14 CFR 1204.506 - Delegation of authority to license the use of the Centennial of Flight Commission name.

Science.gov (United States)

2010-01-01

... of the Centennial of Flight Commission name. 1204.506 Section 1204.506 Aeronautics and Space NATIONAL....506 Delegation of authority to license the use of the Centennial of Flight Commission name. (a... 9 of the Centennial of Flight Commemoration Act, as amended (Pub. L. 105-389) to license the use of...

Ocean-atmosphere forcing of centennial hydroclimatic variability in the Pacific Northwest

Science.gov (United States)

Steinman, Byron A.; Abbott, Mark B.; Mann, Michael E.; Ortiz, Joseph D.; Feng, Song; Pompeani, David P.; Stansell, Nathan D.; Anderson, Lesleigh; Finney, Bruce P.; Bird, Broxton W.

2014-01-01

Reconstructing centennial timescale hydroclimate variability during the late Holocene is critically important for understanding large-scale patterns of drought and their relationship with climate dynamics. We present sediment oxygen isotope records spanning the last two millennia from 10 lakes, as well as climate model simulations, indicating that the Little Ice Age was dry relative to the Medieval Climate Anomaly in much of the Pacific Northwest of North America. This pattern is consistent with observed associations between the El Niño Southern Oscillation (ENSO), the Northern Annular Mode and drought as well as with proxy-based reconstructions of Pacific ocean-atmosphere variations over the past 1000 years. The large amplitude of centennial variability indicated by the lake data suggests that regional hydroclimate is characterized by longer-term shifts in ENSO-like dynamics, and that an improved understanding of the centennial timescale relationship between external forcing and drought conditions is necessary for projecting future hydroclimatic conditions in western North America.

Beyond the Observatory: Reflections on the Centennial

Science.gov (United States)

Devorkin, D. H.

1999-05-01

One of the many unexpected side-benefits of acting as editor of the AAS centennial volume was the chance to take a fresh look at some of the personalities who helped to shape the American Astronomical Society. A common characteristic of these people was their energy, compassion and drive to go "Beyond the Observatory," to borrow a phrase from Harlow Shapley. But what did going `beyond the observatory' mean to Shapley, or to the others who shaped and maintained the Society in its first one hundred years of life? Just as the discipline of astronomy has changed in profound ways in the past century, so has the American Astronomical Society changed, along with the people who have been its leaders and its sustainers and the culture that has fostered it. The Centennial meeting of the Society offers a chance to reflect on the people who have given American astronomy its sense of community identity.

Genetic alterations in syndromes with oral manifestations

Directory of Open Access Journals (Sweden)

Krishnamurthy Anuthama

2013-01-01

Full Text Available Ever since Gregor Johan Mendel proposed the law of inheritance, genetics has transcended the field of health and has entered all walks of life in its application. Thus, the gene is the pivoting factor for all happenings revolving around it. Knowledge of gene mapping in various diseases would be a valuable tool in prenatally diagnosing the condition and averting the future disability and stigma for the posterity. This article includes an array of genetically determined conditions in patients seen at our college out-patient department with complete manifestation, partial manifestation and array of manifestations not fitting into a particular syndrome.

MuSICa at GRIS: a prototype image slicer for EST at GREGOR

Science.gov (United States)

Calcines, A.; Collados, M.; López, R. L.

2013-05-01

This communication presents a prototype image slicer for the 4-m European Solar Telescope (EST) designed for the spectrograph of the 1.5-m GREGOR solar telescope (GRIS). The design of this integral field unit has been called MuSICa (Multi-Slit Image slicer based on collimator-Camera). It is a telecentric system developed specifically for the integral field, high resolution spectrograph of EST and presents multi-slit capability, reorganizing a bidimensional field of view of 80 arcsec^{2} into 8 slits, each one of them with 200 arcsec length × 0.05 arcsec width. It minimizes the number of optical components needed to fulfil this multi-slit capability, three arrays of mirrors: slicer, collimator and camera mirror arrays (the first one flat and the other two spherical). The symmetry of the layout makes it possible to overlap the pupil images associated to each part of the sliced entrance field of view. A mask with only one circular aperture is placed at the pupil position. This symmetric characteristic offers some advantages: facilitates the manufacturing process, the alignment and reduces the costs. In addition, it is compatible with two modes of operation: spectroscopic and spectro-polarimetric, offering a great versatility. The optical quality of the system is diffraction-limited. The prototype will improve the performances of GRIS at GREGOR and is part of the feasibility study of the integral field unit for the spectrographs of EST. Although MuSICa has been designed as a solar image slicer, its concept can also be applied to night-time astronomical instruments (Collados et al. 2010, Proc. SPIE, Vol. 7733, 77330H; Collados et al. 2012, AN, 333, 901; Calcines et al. 2010, Proc. SPIE, Vol. 7735, 77351X)

"The Career Development Quarterly": A Centennial Retrospective

Science.gov (United States)

Savickas, Mark L.; Pope, Mark; Niles, Spencer G.

2011-01-01

"The Career Development Quarterly" has been the premier journal in the field of vocational guidance and career intervention since its inception 100 years ago. To celebrate its centennial, 3 former editors trace its evolution from a modest and occasional newsletter to its current status as a major professional journal. They recount its history of…

High-cadence Imaging and Imaging Spectroscopy at the GREGOR Solar Telescope—A Collaborative Research Environment for High-resolution Solar Physics

Science.gov (United States)

Denker, Carsten; Kuckein, Christoph; Verma, Meetu; González Manrique, Sergio J.; Diercke, Andrea; Enke, Harry; Klar, Jochen; Balthasar, Horst; Louis, Rohan E.; Dineva, Ekaterina

2018-05-01

In high-resolution solar physics, the volume and complexity of photometric, spectroscopic, and polarimetric ground-based data significantly increased in the last decade, reaching data acquisition rates of terabytes per hour. This is driven by the desire to capture fast processes on the Sun and the necessity for short exposure times “freezing” the atmospheric seeing, thus enabling ex post facto image restoration. Consequently, large-format and high-cadence detectors are nowadays used in solar observations to facilitate image restoration. Based on our experience during the “early science” phase with the 1.5 m GREGOR solar telescope (2014–2015) and the subsequent transition to routine observations in 2016, we describe data collection and data management tailored toward image restoration and imaging spectroscopy. We outline our approaches regarding data processing, analysis, and archiving for two of GREGOR’s post-focus instruments (see http://gregor.aip.de), i.e., the GREGOR Fabry–Pérot Interferometer (GFPI) and the newly installed High-Resolution Fast Imager (HiFI). The heterogeneous and complex nature of multidimensional data arising from high-resolution solar observations provides an intriguing but also a challenging example for “big data” in astronomy. The big data challenge has two aspects: (1) establishing a workflow for publishing the data for the whole community and beyond and (2) creating a collaborative research environment (CRE), where computationally intense data and postprocessing tools are colocated and collaborative work is enabled for scientists of multiple institutes. This requires either collaboration with a data center or frameworks and databases capable of dealing with huge data sets based on virtual observatory (VO) and other community standards and procedures.

Abandonment of the low level outlet structure at the McGregor South Dam

Energy Technology Data Exchange (ETDEWEB)

Mack, D.L; Murray, T.K. [Klohn-Crippen Consultants Ltd., Calgary, AB (Canada); Soutar, B.M. [Alberta Transportation, Edmonton, AB (Canada)

2008-07-01

The Carseland-Bow River Headworks (CBRH) is a major multi-purpose water delivery system, situated in southern Alberta. It supplies water to 87,000 hectares of agricultural land and several municipalities. The system was originally built starting in 1909. It consists of diversion works on the Bow River, 65 kilometres of canal, and the McGregor and Little Bow reservoirs. In the 1950s, the system was rehabilitated by the Prairie Farm Rehabilitation Administration (PFRA), and Travers Reservoir was added in 1954. In 1973, ownership and operation of the CBRH system was turned over to Alberta Environment. In 2001, Alberta Transportation implemented a major program to rehabilitate and upgrade the CBRH system. This program included increasing the capacity of the canals and structures, and upgrading the dams to meet current dam safety guidelines. The project involved raising the north and south dams, providing an auxiliary spillway to accommodate the probable maximum flood (PMF), and rehabilitating the existing reservoir inlet and low level outlet structures. This paper discussed the abandonment of the existing low level outlet structure located within the south dam. The paper discussed the existing dams and outlet structure as well as the south dam and outlet structure. The abandonment of the existing low level outlet structure was discussed in terms of general construction; demolition; upstream conduits and gatewell; and downstream conduit. Several illustrations and photographs of the dam and the demolition were presented. It was concluded that the in-place abandonment of the existing low level outlet structure at the McGregor South Dam provides significant advantages, including eliminating the need to construct and remove an extensive cofferdam within the reservoir. 6 refs., 2 tabs., 4 figs.

Volcanic influence on centennial to millennial Holocene Greenland temperature change.

Science.gov (United States)

Kobashi, Takuro; Menviel, Laurie; Jeltsch-Thömmes, Aurich; Vinther, Bo M; Box, Jason E; Muscheler, Raimund; Nakaegawa, Toshiyuki; Pfister, Patrik L; Döring, Michael; Leuenberger, Markus; Wanner, Heinz; Ohmura, Atsumu

2017-05-03

Solar variability has been hypothesized to be a major driver of North Atlantic millennial-scale climate variations through the Holocene along with orbitally induced insolation change. However, another important climate driver, volcanic forcing has generally been underestimated prior to the past 2,500 years partly owing to the lack of proper proxy temperature records. Here, we reconstruct seasonally unbiased and physically constrained Greenland Summit temperatures over the Holocene using argon and nitrogen isotopes within trapped air in a Greenland ice core (GISP2). We show that a series of volcanic eruptions through the Holocene played an important role in driving centennial to millennial-scale temperature changes in Greenland. The reconstructed Greenland temperature exhibits significant millennial correlations with K + and Na + ions in the GISP2 ice core (proxies for atmospheric circulation patterns), and δ 18 O of Oman and Chinese Dongge cave stalagmites (proxies for monsoon activity), indicating that the reconstructed temperature contains hemispheric signals. Climate model simulations forced with the volcanic forcing further suggest that a series of large volcanic eruptions induced hemispheric-wide centennial to millennial-scale variability through ocean/sea-ice feedbacks. Therefore, we conclude that volcanic activity played a critical role in driving centennial to millennial-scale Holocene temperature variability in Greenland and likely beyond.

Intergenerational Panels at Centennial Events: Stimulating Discussion about Continuity and Change in the 4-H Program

Science.gov (United States)

Kaplan, Matthew S.; Weikert, Ben; Scholl, Jan; Rushton, Mya

2013-01-01

This article introduces an intergenerational strategy for organizations planning centennial celebratory events. The methods and findings from the 4-H through the Generations session conducted at the joint 4-H Leadership Conference and 4-H Leaders Forum to celebrate the Pennsylvania 4-H Centennial are reported. Youth and adult participants shared…

Centennial Aerospace Power: The 'US Air Force' at 100 Years

National Research Council Canada - National Science Library

Nelson, Bill

2000-01-01

.... The Centennial Air Force structure and culture during this time will be based both on the national power status of the United States relative to the rest of the world as well as the acquisition...

Stratigraphy and structural setting of Upper Cretaceous Frontier Formation, western Centennial Mountains, southwestern Montana and southeastern Idaho

Science.gov (United States)

Dyman, T.S.; Tysdal, R.G.; Perry, W.J.; Nichols, D.J.; Obradovich, J.D.

2008-01-01

Stratigraphic, sedimentologic, and palynologic data were used to correlate the Frontier Formation of the western Centennial Mountains with time-equivalent rocks in the Lima Peaks area and other nearby areas in southwestern Montana. The stratigraphic interval studied is in the middle and upper parts (but not uppermost) of the formation based on a comparison of sandstone petrography, palynologic age data, and our interpretation of the structure using a seismic line along the frontal zone of the Centennial Mountains and the adjacent Centennial Valley. The Frontier Formation is comprised of sandstone, siltstone, mudstone, limestone, and silty shale in fluvial and coastal depositional settings. A distinctive characteristic of these strata in the western Centennial Mountains is the absence of conglomerate and conglomeratic sandstone beds. Absence of conglomerate beds may be due to lateral facies changes associated with fluvial systems, a distal fining of grain size, and the absence of both uppermost and lower Frontier rocks in the study area. Palynostratigraphic data indicate a Coniacian age for the Frontier Formation in the western Centennial Mountains. These data are supported by a geochronologic age from the middle part of the Frontier at Lima Peaks indicating a possible late Coniacian-early Santonian age (86.25 ?? 0.38 Ma) for the middle Frontier there. The Frontier Formation in the western Centennial Mountains is comparable in age and thickness to part of the Frontier at Lima Peaks. These rocks represent one of the thickest known sequences of Frontier strata in the Rocky Mountain region. Deposition was from about 95 to 86 Ma (middle Cenomanian to at least early Santonian), during which time, shoreface sandstone of the Telegraph Creek Formation and marine shale of the Cody Shale were deposited to the east in the area now occupied by the Madison Range in southwestern Montana. Frontier strata in the western Centennial Mountains are structurally isolated from other

Centennial-scale solar forcing of the South American Monsoon System recorded in stalagmites.

Science.gov (United States)

Novello, Valdir F; Vuille, Mathias; Cruz, Francisco W; Stríkis, Nicolás M; de Paula, Marcos Saito; Edwards, R Lawrence; Cheng, Hai; Karmann, Ivo; Jaqueto, Plínio F; Trindade, Ricardo I F; Hartmann, Gelvam A; Moquet, Jean S

2016-04-21

The South American Monsoon System (SAMS) is generally considered to be highly sensitive to Northern Hemisphere (NH) temperature variations on multi-centennial timescales. The direct influence of solar forcing on moisture convergence in global monsoon systems on the other hand, while well explored in modeling studies, has hitherto not been documented in proxy data from the SAMS region. Hence little is known about the sensitivity of the SAMS to solar forcing over the past millennium and how it might compete or constructively interfere with NH temperature variations that occurred primarily in response to volcanic forcing. Here we present a new annually-resolved oxygen isotope record from a 1500-year long stalagmite recording past changes in precipitation in the hitherto unsampled core region of the SAMS. This record details how solar variability consistently modulated the strength of the SAMS on centennial time scales during the past 1500 years. Solar forcing, besides the previously recognized influence from NH temperature changes and associated Intertropical Convergence Zone (ITCZ) shifts, appears as a major driver affecting SAMS intensity at centennial time scales.

McEvoy, Kieran; McGregor, Lorna, Transitional Justice from below. Grassroots Activism and the Struggle for Change

Directory of Open Access Journals (Sweden)

José M. Atiles-Osoria

2012-10-01

Full Text Available El texto editado por Kieran McEvoy y Lorna McGregor representa un esfuerzo por repensar, redefinir e introducir un debate en el seno de la literatura y de las corrientes de estudio sobre la justicia transicional. Generalmente, la justicia transicional ha sido pensada como un conglomerado de estrategias jurídico‑políticas y socio‑económicas implementadas para lidiar con las violaciones de los derechos humanos, con la violencia política del pasado y los procesos de reconstrucción del Estado pos...

A multimodel comparison of centennial Atlantic meridional overturning circulation variability

Energy Technology Data Exchange (ETDEWEB)

Menary, Matthew B.; Vellinga, Michael; Palmer, Matthew D. [Met Office Hadley Centre, Exeter, Devon (United Kingdom); Park, Wonsun; Latif, Mojib [IFM-GEOMAR, Leibniz-Institut fuer Meereswissenschaften, Kiel (Germany); Lohmann, Katja; Jungclaus, Johann H. [Max Planck Inst Meteorol, Hamburg (Germany)

2012-06-15

A mechanism contributing to centennial variability of the Atlantic Meridional Overturning Circulation (AMOC) is tested with multi-millennial control simulations of several coupled general circulation models (CGCMs). These are a substantially extended integration of the 3rd Hadley Centre Coupled Climate Model (HadCM3), the Kiel Climate Model (KCM), and the Max Plank Institute Earth System Model (MPI-ESM). Significant AMOC variability on time scales of around 100 years is simulated in these models. The centennial mechanism links changes in the strength of the AMOC with oceanic salinities and surface temperatures, and atmospheric phenomena such as the Intertropical Convergence Zone (ITCZ). 2 of the 3 models reproduce all aspects of the mechanism, with the third (MPI-ESM) reproducing most of them. A comparison with a high resolution paleo-proxy for Sea Surface Temperatures (SSTs) north of Iceland over the last 4,000 years, also linked to the ITCZ, suggests that elements of this mechanism may also be detectable in the real world. (orig.)

Exploring the nature of science through courage and purpose: a case study of Nikolai Vavilov and plant biodiversity.

Science.gov (United States)

Cohen, Joel I; Loskutov, Igor G

2016-01-01

Historical biographies facilitate teaching the 'nature of science'. This case study focuses on how Nikolai Vavilov's unrelenting sense of purpose, courage, and charismatic personality was maintained during violent revolutionary change in Russia. The rediscovery of Gregor Mendel's laws of inheritance provided Vavilov with a scientific foundation for crop improvement, this foundation was later bolstered by Vavilov's personal drive to conserve plant biodiversity. As he advanced theories and pragmatic approaches for genetic improvement and conservation of plants, political leaders in Russian came to reject Mendel's principles and eventually Vavilov's work. This rejection occurred because Joseph Stalin was desperate for a quick remedy to the famine and suffering from forced collective agriculture. Vavilov's work continued, modernizing Russian crop research while inspiring other scientists to save seeds stored in the world's first gene bank. Three themes illustrating the nature of science help examine Vavilov's life: explaining natural phenomena, uncompromising human endeavor, and revising scientific knowledge. The case study concludes with four questions to stimulate student inquiry and self-guided research. They also deepen student understanding of Vavilov's personal sacrifices to ensure use and conservation of plant biodiversity.

U.S. Centennial of Flight Commision: Born of Dreams - Inspired by Freedom

Science.gov (United States)

2004-01-01

The U.S. Centennial of Flight Commission developed and maintained a public web site that included activities related to the centennial of flight celebration and the history of aviation. The web site, www.centennialofflight.gov, was continually updated with educational and historical information, events, sights and sounds, and Commission information from its inception to June 2004. This DVD contains a 'snap shot' of the web site as of April 2004. The Web site on this DVD can be enjoyed without an Internet connection although in some places, you will be given links to online content. DVD content includes: 1) About the Commission - Information on the legislation, the Commissioners and Advisory Board members, news, the National Plans, meeting minutes and status reports; 2) Calendar of Events - A comprehensive list of activities, symposiums, exhibits, air shows, educational activities and more that took place through March 2004; 3) Wright Brothers History - The Library of Congress bibliography of Wright-related resources as well as the Chronology and Flight Log; the Brunsman articles; interactive learning modules from The Wright Experience; short informative essays and a series of links to other Wright brothers information sources. 4) History of Flight - Essays and images on the history of flight; 5) Sights and Sounds - Images, movies and special collections that capture the accomplishments of the Wright brothers and others who made significant contributions throughout the history of aviation and aerospace. As part of the NASA Art Program, a centennial song, 'Way Up There,' was commissioned; 6) Licensed Products - View collections of souvenirs and gift items to commemorate the 100th anniversary of the first powered flight; 7) Education - Resources that will help educators and their students celebrate 100 years of flight. Teachers can download Wright brothers posters and a Centennial of Flight bookmark, view live Web casts, and access an Educational Resources Center

MuSICa image slicer prototype at 1.5-m GREGOR solar telescope

Science.gov (United States)

Calcines, A.; López, R. L.; Collados, M.; Vega Reyes, N.

2014-07-01

Integral Field Spectroscopy is an innovative technique that is being implemented in the state-of-the-art instruments of the largest night-time telescopes, however, it is still a novelty for solar instrumentation. A new concept of image slicer, called MuSICa (Multi-Slit Image slicer based on collimator-Camera), has been designed for the integral field spectrograph of the 4-m European Solar Telescope. This communication presents an image slicer prototype of MuSICa for GRIS, the spectrograph of the 1.5-m GREGOR solar telescope located at the Observatory of El Teide. MuSICa at GRIS reorganizes a 2-D field of view of 24.5 arcsec into a slit of 0.367 arcsec width by 66.76 arcsec length distributed horizontally. It will operate together with the TIP-II polarimeter to offer high resolution integral field spectropolarimetry. It will also have a bidimensional field of view scanning system to cover a field of view up to 1 by 1 arcmin.

North Dakota's Centennial Quilt and Problem Solvers: Solutions: The Library Problem

Science.gov (United States)

Small, Marian

2010-01-01

Quilt investigations, such as the Barn quilt problem in the December 2008/January 2009 issue of "Teaching Children Mathematics" and its solutions in last month's issue, can spark interdisciplinary pursuits for teachers and exciting connections for the full range of elementary school students. This month, North Dakota's centennial quilt…

A Centennial Episode of Weak East Asian Summer Monsoon in the Midst of the Medieval Warming

Science.gov (United States)

Jin, C.; Liu, J.; Wang, B.; Wang, Z.; Yan, M.

2017-12-01

Recent paleo-proxy evidences suggested that the East Asian summer monsoon (EASM) was generally strong (i.e., northern China wet and southern China dry) during the Medieval Warm Period (MWP, 9th to the mid-13th century), however, there was a centennial period (around 11th century) during which the EASM was weak. This study aims to explore the causes of this centennial weak EASM episode and in general, what controls the centennial variability of the EASM in the pre-industrial period of AD 501-1850. With the Community Earth System Model (CESM), a suit of control and forced experiments were conducted for the past 2000 years. The model run with all external forcings simulates a warm period of EA from AD 801-1250 with a generally increased summer mean precipitation over the northern EA; however, during the 11th century (roughly from AD 980 to AD 1100), the EASM is significantly weaker than the other periods during the MWP. We find that on the multi-decadal to centennial time scale, a strong EASM is associated with a La Nina-like Indo-Pacific warming and the opposite is also true. This sea surface temperature (SST) anomaly pattern represents the leading EOF mode of centennial SST variations, and it is primarily forced by the solar radiation and volcanic activity, whereas the land use/land cover and greenhouse gases as well as internal dynamics play a negligible role. During the MWP, the solar forcing plays a dominate role in supporting the SST variation as the volcanic activity is weak. The weakening of the EASM during the AD 980-1100 is attributed to the relatively low solar radiation, which leads to a prevailing El Nino-like Indo-Pacific cooling with strongest cooling occurring in the equatorial western Pacific. The suppressed convection over the equatorial western Pacific directly induces a Philippine Sea anticyclone anomaly, which increases southern China precipitation, meanwhile suppresses Philippine Sea precipitation, exciting a meridional teleconnection that

Maintaining continuity through a scientific revolution: a rereading of E. B. Wilson and T. H. Morgan on sex determination and Mendelism.

Science.gov (United States)

Kingsland, Sharon E

2007-09-01

A rereading of the American scientific literature on sex determination from 1902 to 1926 leads to a different understanding of the construction of the Mendelian-chromosome theory after 1910. There was significant intellectual continuity, which has not been properly appreciated, underlying this scientific "revolution." After reexamining the relationship between the ideas of key scientists, in particular Edmund B. Wilson and Thomas Hunt Morgan, I argue that, contrary to the historical literature, Wilson and Morgan did not adopt opposing views on Mendelism and sex determination. Rather, each preferred a non-Mendelian explanation of the determination of sex. Around 1910, both integrated the Mendelian and non-Mendelian theories to create a synthetic theory. One problem was the need to avoid an overly deterministic view of sex while also accepting the validity of Mendelism. Morgan's discovery of mutations on the X chromosome takes on different significance when set in the context of the debate about sex determination, and Calvin Bridges's work on sex determination is better seen as a development of Morgan's ideas, rather than a departure from them. Conclusions point to the role of synthesis within fields as a way to advance scientific theories and reflect on the relationship between synthesis and explanatory "pluralism" in biology.

Pronounced centennial-scale Atlantic Ocean climate variability correlated with Western Hemisphere hydroclimate

Science.gov (United States)

Thirumalai, Kaustubh; Quinn, Terrence M.; Okumura, Yuko; Richey, Julie; Partin, Judson W.; Poore, Richard Z.; Moreno-Chamarro, Eduardo

2018-01-01

Surface-ocean circulation in the northern Atlantic Ocean influences Northern Hemisphere climate. Century-scale circulation variability in the Atlantic Ocean, however, is poorly constrained due to insufficiently-resolved paleoceanographic records. Here we present a replicated reconstruction of sea-surface temperature and salinity from a site sensitive to North Atlantic circulation in the Gulf of Mexico which reveals pronounced centennial-scale variability over the late Holocene. We find significant correlations on these timescales between salinity changes in the Atlantic, a diagnostic parameter of circulation, and widespread precipitation anomalies using three approaches: multiproxy synthesis, observational datasets, and a transient simulation. Our results demonstrate links between centennial changes in northern Atlantic surface-circulation and hydroclimate changes in the adjacent continents over the late Holocene. Notably, our findings reveal that weakened surface-circulation in the Atlantic Ocean was concomitant with well-documented rainfall anomalies in the Western Hemisphere during the Little Ice Age.

Pronounced centennial-scale Atlantic Ocean climate variability correlated with Western Hemisphere hydroclimate.

Science.gov (United States)

Thirumalai, Kaustubh; Quinn, Terrence M; Okumura, Yuko; Richey, Julie N; Partin, Judson W; Poore, Richard Z; Moreno-Chamarro, Eduardo

2018-01-26

Surface-ocean circulation in the northern Atlantic Ocean influences Northern Hemisphere climate. Century-scale circulation variability in the Atlantic Ocean, however, is poorly constrained due to insufficiently-resolved paleoceanographic records. Here we present a replicated reconstruction of sea-surface temperature and salinity from a site sensitive to North Atlantic circulation in the Gulf of Mexico which reveals pronounced centennial-scale variability over the late Holocene. We find significant correlations on these timescales between salinity changes in the Atlantic, a diagnostic parameter of circulation, and widespread precipitation anomalies using three approaches: multiproxy synthesis, observational datasets, and a transient simulation. Our results demonstrate links between centennial changes in northern Atlantic surface-circulation and hydroclimate changes in the adjacent continents over the late Holocene. Notably, our findings reveal that weakened surface-circulation in the Atlantic Ocean was concomitant with well-documented rainfall anomalies in the Western Hemisphere during the Little Ice Age.

Natural time analysis of the Centennial Earthquake Catalog

International Nuclear Information System (INIS)

Sarlis, N. V.; Christopoulos, S.-R. G.

2012-01-01

By using the most recent version (1900–2007) of the Centennial Earthquake Catalog, we examine the properties of the global seismicity. Natural time analysis reveals that the fluctuations of the order parameter κ 1 of seismicity exhibit for at least three orders of magnitude a characteristic feature similar to that of the order parameter for other equilibrium or non-equilibrium critical systems—including self-organized critical systems. Moreover, we find non-trivial magnitude correlations for earthquakes of magnitude greater than or equal to 7.

77 FR 65099 - Use of the Centennial of Flight Commission Name; Correction

Science.gov (United States)

2012-10-25

... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION 14 CFR Part 1204 [Docket No. NASA-2012-0004] RIN 2700-AD78 Use of the Centennial of Flight Commission Name; Correction AGENCY: National Aeronautics and Space Administration. ACTION: Direct final rule; correction. SUMMARY: This document corrects a direct...

The 20-20-20 Airships NASA Centennial Challenge

Science.gov (United States)

Kiessling, Alina; Diaz, Ernesto; Rhodes, Jason; Ortega, Sam; Eberly, Eric

2015-08-01

A 2013 Keck Institute for Space Studies (KISS) study examined airships as a possible platform for Earth and space science. Airships, lighter than air, powered, maneuverable vehicles, could offer significant gains in observing time, sky and ground coverage, data downlink capability, and continuity of observations over existing suborbital options at competitive prices. The KISS study recommended three courses of action to spur the development and use of airships as a science platform. One of those recommendations was that a prize competition be developed to demonstrate a stratospheric airship. Consequently, we have been developing a NASA Centennial Challenge; (www.nasa.gov/challenges) to spur innovation in stratospheric airships as a science platform. We anticipate a multi-million dollar class prize for the first organization to fly a powered airship that remains stationary at 20km (65,000 ft) altitude for over 20 hours with a 20kg payload. The design must be scalable to longer flights with more massive payloads. A second prize tier, for a 20km flight lasting 200 hours with a 200kg payload would incentivize a further step toward a scientifically compelling and viable new platform. This technology would also have broad commercial applications including communications, asset tracking, and surveillance. Via the 20-20-20 Centennial Challenge, we are seeking to spur private industry (or non-profit institutions, including Universities) to demonstrate the capability for sustained airship flights as astronomy and Earth science platforms.

Mendel Lives: The Survival of Mendelian Genetics in the Lysenkoist Classroom, 1937-1964

Science.gov (United States)

Peacock, Margaret

2015-01-01

The demise of Soviet genetics in the 1930s, 40s, and 50s has stood for many as a prime example of the damage that social and political dogmatism can do when allowed to meddle in the workings of science. In particular, the story of Trofim Lysenko's rise to preeminence and the fall of Mendelian genetics in the Soviet Union has become a lasting testament to the dangers of state power and a seemingly blatant manifestation of totalitarianism in practice. In recent years, historians have begun to complicate this story. The purpose of this article is to examine the extent to which this conventional account of state power in Soviet biology, symbolized by the disappearance of Mendel, still holds true. Using middle school textbooks, encyclopedias, and pedagogical journals that were published between 1934 and 1964 this article argues that despite its efforts, the state apparatus was functionally incapable of eradicating genetics from its schools.

Does genomic imprinting play a role in autoimmunity?

Science.gov (United States)

Camprubí, Cristina; Monk, David

2011-01-01

In the 19th century Gregor Mendel defined the laws of genetic inheritance by crossing different types of peas. From these results arose his principle of equivalence: the gene will have the same behaviour whether it is inherited from the mother or the father. Today, several key exceptions to this principle are known, for example sex-linked traits and genes in the mitochondrial genome, whose inheritance patterns are referred to as 'non mendelian'. A third, important exception in mammals is that of genomic imprinting, where transcripts are expressed in a monoallelic fashion from only the maternal or the paternal chromosome. In this chapter, we discuss how parent-of-origin effects and genomic imprinting may play a role in autoimmunity and speculate how imprinted miRNAs may influence the expression of many target autoimmune associated genes.

Centennial celebration of the discovery of radioactivity

International Nuclear Information System (INIS)

Bimbot, R.

1999-01-01

Initiated in January 1996 by a ceremony held at the French National Academy of Medicine, the centennial commemoration of the discovery of radioactivity will continue until the end of 1998 when a similar ceremony will take place at the Academy of Sciences. The manifestations are now organized over the whole French territory with the help of 22 regional committees. Educational actions and conferences have been stimulated by the recent edition of the booklet 'Radioactivity' in French, English and Spanish, which has been sent to all the middle and secondary schools in France. A series of international actions are also scheduled in France and abroad, with the help of the French Foreign Affairs Ministry. (authors)

Positivity VII (Zaanen Centennial Conference)

CERN Document Server

Pagter, Ben; Gaans, Onno; Veraar, Mark

2016-01-01

This book presents the proceedings of Positivity VII, held from 22-26 July 2013, in Leiden, the Netherlands. Positivity is the mathematical field concerned with ordered structures and their applications in the broadest sense of the word. A biyearly series of conferences is devoted to presenting the latest developments in this lively and growing discipline. The lectures at the conference covered a broad spectrum of topics, ranging from order-theoretic approaches to stochastic processes, positive solutions of evolution equations and positive operators on vector lattices, to order structures in the context of algebras of operators on Hilbert spaces. The contributions in the book reflect this variety and appeal to university researchers in functional analysis, operator theory, measure and integration theory and operator algebras. Positivity VII was also the Zaanen Centennial Conference to mark the 100th birth year of Adriaan Cornelis Zaanen, who held the chair of Analysis in Leiden for more than 25 years and was ...

Modeling Climate Responses to Spectral Solar Forcing on Centennial and Decadal Time Scales

Science.gov (United States)

Wen, G.; Cahalan, R.; Rind, D.; Jonas, J.; Pilewskie, P.; Harder, J.

2012-01-01

We report a series of experiments to explore clima responses to two types of solar spectral forcing on decadal and centennial time scales - one based on prior reconstructions, and another implied by recent observations from the SORCE (Solar Radiation and Climate Experiment) SIM (Spectral 1rradiance Monitor). We apply these forcings to the Goddard Institute for Space Studies (GISS) Global/Middle Atmosphere Model (GCMAM). that couples atmosphere with ocean, and has a model top near the mesopause, allowing us to examine the full response to the two solar forcing scenarios. We show different climate responses to the two solar forCing scenarios on decadal time scales and also trends on centennial time scales. Differences between solar maximum and solar minimum conditions are highlighted, including impacts of the time lagged reSponse of the lower atmosphere and ocean. This contrasts with studies that assume separate equilibrium conditions at solar maximum and minimum. We discuss model feedback mechanisms involved in the solar forced climate variations.

A model based on Rock-Eval thermal analysis to quantify the size of the centennially persistent organic carbon pool in temperate soils

Science.gov (United States)

Cécillon, Lauric; Baudin, François; Chenu, Claire; Houot, Sabine; Jolivet, Romain; Kätterer, Thomas; Lutfalla, Suzanne; Macdonald, Andy; van Oort, Folkert; Plante, Alain F.; Savignac, Florence; Soucémarianadin, Laure N.; Barré, Pierre

2018-05-01

Changes in global soil carbon stocks have considerable potential to influence the course of future climate change. However, a portion of soil organic carbon (SOC) has a very long residence time ( > 100 years) and may not contribute significantly to terrestrial greenhouse gas emissions during the next century. The size of this persistent SOC reservoir is presumed to be large. Consequently, it is a key parameter required for the initialization of SOC dynamics in ecosystem and Earth system models, but there is considerable uncertainty in the methods used to quantify it. Thermal analysis methods provide cost-effective information on SOC thermal stability that has been shown to be qualitatively related to SOC biogeochemical stability. The objective of this work was to build the first quantitative model of the size of the centennially persistent SOC pool based on thermal analysis. We used a unique set of 118 archived soil samples from four agronomic experiments in northwestern Europe with long-term bare fallow and non-bare fallow treatments (e.g., manure amendment, cropland and grassland) as a sample set for which estimating the size of the centennially persistent SOC pool is relatively straightforward. At each experimental site, we estimated the average concentration of centennially persistent SOC and its uncertainty by applying a Bayesian curve-fitting method to the observed declining SOC concentration over the duration of the long-term bare fallow treatment. Overall, the estimated concentrations of centennially persistent SOC ranged from 5 to 11 g C kg-1 of soil (lowest and highest boundaries of four 95 % confidence intervals). Then, by dividing the site-specific concentrations of persistent SOC by the total SOC concentration, we could estimate the proportion of centennially persistent SOC in the 118 archived soil samples and the associated uncertainty. The proportion of centennially persistent SOC ranged from 0.14 (standard deviation of 0.01) to 1 (standard deviation

A model based on Rock-Eval thermal analysis to quantify the size of the centennially persistent organic carbon pool in temperate soils

Directory of Open Access Journals (Sweden)

L. Cécillon

2018-05-01

Full Text Available Changes in global soil carbon stocks have considerable potential to influence the course of future climate change. However, a portion of soil organic carbon (SOC has a very long residence time ( >  100 years and may not contribute significantly to terrestrial greenhouse gas emissions during the next century. The size of this persistent SOC reservoir is presumed to be large. Consequently, it is a key parameter required for the initialization of SOC dynamics in ecosystem and Earth system models, but there is considerable uncertainty in the methods used to quantify it. Thermal analysis methods provide cost-effective information on SOC thermal stability that has been shown to be qualitatively related to SOC biogeochemical stability. The objective of this work was to build the first quantitative model of the size of the centennially persistent SOC pool based on thermal analysis. We used a unique set of 118 archived soil samples from four agronomic experiments in northwestern Europe with long-term bare fallow and non-bare fallow treatments (e.g., manure amendment, cropland and grassland as a sample set for which estimating the size of the centennially persistent SOC pool is relatively straightforward. At each experimental site, we estimated the average concentration of centennially persistent SOC and its uncertainty by applying a Bayesian curve-fitting method to the observed declining SOC concentration over the duration of the long-term bare fallow treatment. Overall, the estimated concentrations of centennially persistent SOC ranged from 5 to 11 g C kg−1 of soil (lowest and highest boundaries of four 95 % confidence intervals. Then, by dividing the site-specific concentrations of persistent SOC by the total SOC concentration, we could estimate the proportion of centennially persistent SOC in the 118 archived soil samples and the associated uncertainty. The proportion of centennially persistent SOC ranged from 0.14 (standard deviation

The Centennial of Counselor Education: Origin and Early Development of a Discipline

Science.gov (United States)

Savickas, Mark L.

2011-01-01

July 7, 2011, marks the centennial of counselor education as a formal discipline. In recognition of its 100th birthday, the author of this article describes the origins of the discipline, beginning with its prehistory in the work of Frank Parsons to establish the practice of vocational guidance, describing the 1st course in counselor education at…

Centennial- to millennial-scale hard rock erosion rates deduced from luminescence-depth profiles

DEFF Research Database (Denmark)

Sohbati, Reza; Liu, Jinfeng; Jain, Mayank

2018-01-01

to quantify hard rock erosion rates at centennial to millennial timescales. Here we propose a novel technique, based on the solar bleaching of luminescence signals with depth into rock surfaces, to bridge this analytical gap. We apply our technique to glacial and landslide boulders in the Eastern Pamirs...

PREFACE: Rutherford Centennial Conference on Nuclear Physics

Science.gov (United States)

Freeman, Sean

2012-09-01

, giving a really excellent set of presentations. Finally we are also pleased to express our thanks to the Conference Office of the Institute of Physics for their invaluable support in organising this event. We are especially grateful to Dawn Stewart for her responsive and efficient day-to-day handling of this event, as well as to Claire Garland for her planning and management of this event. This conference is the second in a series of conferences that began with the Rutherford Jubilee Conference held in Manchester in 1961, which is described in one of the contributions to these proceedings. I do hope that at least some of the delegates from the Centennial Conference will be able to attend the next one, fifty years hence in 2061, just as we were honoured to have some of the Jubilee delegates with us for the Centennial. If I am still around, I doubt that I will have the energy then to be conference chair. I would also not like to attempt to predict the plenary programme, but I hope that it will be as vibrant and exciting as the 2011 conference. Professor Sean J Freeman Conference Chair On behalf of the UK Organising Committee Ernest Rutherford Ernest Rutherford (Photograph courtesy of The University of Manchester) Edited by: Sean Freeman (The University of Manchester) Andrei Andreyev (University of the West of Scotland/The University of York) Alison Bruce (University of Brighton) Alick Deacon (The University of Manchester) Dave Jenkins (University of York) Dave Joss (University of Liverpool) Douglas MacGregor (University of Glasgow) Paddy Regan (University of Surrey) John Simpson (University of Daresbury) Garry Tungate (University of Birmingham) Bob Wadsworth (University of York) Dan Watts (University of Edinburgh) International Advisory Panel: A Aprahamian (Notre Dame, USA) J Äystö (Jyväskylä, Finland) F Aziaez (Orsay, France) J-P Blaizot (Saclay, France/ECT, Italy) A Bracco (Milan, Italy) H Caines (Yale, USA) C W de Jaeger (JLAB, USA) J Dilling (TRIUMF, Canada) J

The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity

Directory of Open Access Journals (Sweden)

T. Friedrich

2010-08-01

Full Text Available The mechanism triggering centennial-to-millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obliquity values (~22.1° or LGM-albedo, internally generated centennial-to-millennial-scale variability occurs in the North Atlantic region. Stochastic excitations of the density-driven overturning circulation in the Nordic Seas can create regional sea-ice anomalies and a subsequent reorganization of the atmospheric circulation. The resulting remote atmospheric anomalies over the Hudson Bay can release freshwater pulses into the Labrador Sea and significantly increase snow fall in this region leading to a subsequent reduction of convective activity. The millennial-scale AMOC oscillations disappear if LGM bathymetry (with closed Hudson Bay is prescribed or if freshwater pulses are suppressed artificially. Furthermore, our study documents the process of the AMOC recovery as well as the global marine and terrestrial carbon cycle response to centennial-to-millennial-scale AMOC variability.

The human side of science education: Using McGregor's theory Y as a framework for improving student motivation*.

Science.gov (United States)

Markwell, John

2004-09-01

Student motivation is correlated with learning. Douglas McGregor's Theory X and Theory Y as a basis for understanding and improving motivation in the business world can be directly applied to the science classroom. Teachers with a Theory Y perspective (students naturally want to learn) provide increased motivation for students and promote more active learning than Theory X-style teachers who do not view students as active learners. Many teachers are not aware of their Theory X/Theory Y orientation and how this bias may be impacting their interaction with students. This article explores the benefits of moving from a Theory X to a more Theory Y style of teaching. Copyright © 2004 International Union of Biochemistry and Molecular Biology, Inc.

German-Iowan Strategies in Celebrating the Centennial of Alexander von Humboldt’s Birth

Directory of Open Access Journals (Sweden)

Bill Roba

2014-12-01

Full Text Available The two largest cities of Eastern Iowa on the shore of the Mississippi River are Dubuque and Davenport. In each city, an elite group of German-Iowan leaders emerged by the late 1850s. Bill Roba describes and examines their strategies in celebrating the Centennial of Alexander von Humboldt’s Birth.

Displaying lives: the narrative of objects in biographical exhibitions

Directory of Open Access Journals (Sweden)

Caterina Albano

2007-03-01

Full Text Available Biographical exhibitions are a museum practice that asks for critical consideration. Grounding the argument in critical theory, social studies and museum theory, the article explores the narrative function of objects in biographical exhibitions by addressing the social significance of objects in relation to biography and their relevance when presented into an exhibition display. Central is the concept of objects as ‘biographical relics’ that are culturally fetishized in biographical narratives. This raises questions about biographical reliability and the cultural role that such objects plays in exhibition narratives as bearers of reality and as metonymical icons of the biographical subject. The article considers examples of biographical exhibitions of diverse figures such as Gregor Mendel, Madame de Pompadour and Roland Barthes, and the role that personal items, but also portraits and photographs, play in them.

Opto-mechanical design of an image slicer for the GRIS spectrograph at GREGOR

Science.gov (United States)

Vega Reyes, N.; Esteves, M. A.; Sánchez-Capuchino, J.; Salaun, Y.; López, R. L.; Gracia, F.; Estrada Herrera, P.; Grivel, C.; Vaz Cedillo, J. J.; Collados, M.

2016-07-01

An image slicer has been proposed for the Integral Field Spectrograph [1] of the 4-m European Solar Telescope (EST) [2] The image slicer for EST is called MuSICa (Multi-Slit Image slicer based on collimator-Camera) [3] and it is a telecentric system with diffraction limited optical quality offering the possibility to obtain high resolution Integral Field Solar Spectroscopy or Spectro-polarimetry by coupling a polarimeter after the generated slit (or slits). Considering the technical complexity of the proposed Integral Field Unit (IFU), a prototype has been designed for the GRIS spectrograph at GREGOR telescope at Teide Observatory (Tenerife), composed by the optical elements of the image slicer itself, a scanning system (to cover a larger field of view with sequential adjacent measurements) and an appropriate re-imaging system. All these subsystems are placed in a bench, specially designed to facilitate their alignment, integration and verification, and their easy installation in front of the spectrograph. This communication describes the opto-mechanical solution adopted to upgrade GRIS while ensuring repeatability between the observational modes, IFU and long-slit. Results from several tests which have been performed to validate the opto-mechanical prototypes are also presented.

CENTENNIAL MOUNTAINS WILDERNESS STUDY AREA, MONTANA AND IDAHO.

Science.gov (United States)

Witkind, Irving J.; Ridenour, James

1984-01-01

A mineral survey conducted within the Centennial Mountains Wilderness study area in Montana and Idaho showed large areas of probable and substantiated resource potential for phosphate. Byproducts that may be derived from processing the phosphate include vanadium, chromium, uranium, silver, fluorine, and the rare earths, lanthanum and yttrium. Results of a geochemical sampling program suggest that there is little promise for the occurrence of base and precious metals in the area. Although the area contains other nonmetallic deposits, such as coal, building stone, and pumiceous ash they are not considered as mineral resources. There is a probable resource potential for oil and gas and significant amounts may underlie the area around the Peet Creek and Odell Creek anticlines.

Reconquering the Americas in order to Regenerate Europe. Spanish Nationalism and American Inde- pendence Centennials in 1910-1911

Directory of Open Access Journals (Sweden)

Javier Moreno Luzón

2010-07-01

Full Text Available This article analyzes Spanish participation in the centennial celebration  of several American  independencies in 1910-1911 (those of Argentina,  Mexico, Chile and Venezuela. The recurring issues of Spanish nationalism  of that time are studied,  inclu- ding the need to “regenerate” Spain after the 1898 disaster, by adopting a “hispanoamericanist” language. The author also describes the initiatives of several immigrant  collectivities in these American  countries,  concerned  as they were about  their cohesion and visibility, and discusses the impulses and limitations of Spain's foreign policies. All these elements reveal the relevance acquired  by centennial commemorations in nationalist  movements and policies.

General relativity and gravitation a centennial perspective

CERN Document Server

Berger, Beverly K; Isenberg, James; MacCallum, Malcolm

2015-01-01

Explore spectacular advances in cosmology, relativistic astrophysics, gravitational wave science, mathematics, computational science, and the interface of gravitation and quantum physics with this unique celebration of the centennial of Einstein's discovery of general relativity. Twelve comprehensive and in-depth reviews, written by a team of world-leading international experts, together present an up-to-date overview of key topics at the frontiers of these areas, with particular emphasis on the significant developments of the last three decades. Interconnections with other fields of research are also highlighted, making this an invaluable resource for both new and experienced researchers. Commissioned by the International Society on General Relativity and Gravitation, and including accessible introductions to cutting-edge topics, ample references to original research papers, and informative colour figures, this is a definitive reference for researchers and graduate students in cosmology, relativity, and grav...

Mexican Childhood in Both National Independence Centennials (Mexico City, 1910 and 1921)

OpenAIRE

Sergio Moreno Juárez

2012-01-01

This essay analyzes the peculiar way in which Mexican childhood was linked to historical memory during the commemoration of the first two national independence centennials (1910 and 1921), for these two historical divides represent not only the tremendous festivities of each celebrating regime, but also an essential part in the process of building national culture and identity in modern Mexico. Seen from the viewpoint, the celebrations become a kind of showcase for the pedagogical and hygieni...

The Human Genoma

International Nuclear Information System (INIS)

Groot de Restrepo Helena

2002-01-01

The process to decipher the genetic code has taken several years and it began with the investigations that he carried out toward half of the XIX century the Czech monk Gregor Mendel who used characteristic contrasting in the plants to study the laws of the inheritance. He made two surprising discoveries. First that many characteristics are inherited in a form of everything or anything: a plant is high or short, and their seeds are flat or rough and second that disappears during a generation when crossing those plants to each other one of the characteristic. When crossing a short plant with a discharge, in the first generation, high plants will only be obtained, but when crossing them again, the characteristic that didn't show during a generation, the short plant will appear again. The article is about the genes and chromosomes, mutations and like the genes work among other topics

More than a Mentor: Leonard Darwin's Contribution to the Assimilation of Mendelism into Eugenics and Darwinism.

Science.gov (United States)

Serpente, Norberto

2016-08-01

This article discusses the contribution to evolutionary theory of Leonard Darwin (1850-1943), the eighth child of Charles Darwin. By analysing the correspondence Leonard Darwin maintained with Ronald Aylmer Fisher in conjunction with an assessment of his books and other written works between the 1910s and 1930s, this article argues for a more prominent role played by him than the previously recognised in the literature as an informal mentor of Fisher. The paper discusses Leonard's efforts to amalgamate Mendelism with both Eugenics and Darwinism in order for the first to base their policies on new scientific developments and to help the second in finding a target for natural selection. Without a formal qualification in biological sciences and as such mistrusted by some "formal" scientists, Leonard Darwin engaged with key themes of Darwinism such as mimicry, the role of mutations on speciation and the process of genetic variability, arriving at important conclusions concerning the usefulness of Mendelian genetics for his father's theory.

78 FR 51192 - World War I Centennial Commission; Notification of Upcoming Public Advisory Meeting; Sunshine Act...

Science.gov (United States)

2013-08-20

... GENERAL SERVICES ADMINISTRATION [Notice-WWICC-2013-01; Docket No. 2013-0007; Sequence 1] World War I Centennial Commission; Notification of Upcoming Public Advisory Meeting; Sunshine Act Meetings Time and Date: Open: 9:30 a.m.-5:30 p.m. (Central Time) on Friday, September 13, 2013. Place: The...

Mendel at the sesquicentennial of 'Versuche über Pflanzen-Hybriden' (1865): The root of the biggest legend in the history of science.

Science.gov (United States)

Tanghe, Koen B

2015-06-01

In 1965, Mendel was still celebrated as the undisputed founder of genetics. In the ensuing 50 years, scholars questioned and undermined this traditional interpretation of his experiments with hybrid plants, without, however, managing to replace it: at the sesquicentennial of the presentation of his 'Versuche' (1865), the Moravian friar remains, to a vast majority, the heroic Father of genetics or at least some kind of geneticist. This exceptionally inert myth is nourished by ontological intuitions but can only continue to flourish, thanks to a long-standing conceptual void in the historiography of biology. It is merely a symptom of this more fundamental problem. Copyright © 2015 Elsevier Ltd. All rights reserved.

Establishing and Sustaining Research-Based Practices at Centennial School: A Descriptive Case Study of Systemic Change

Science.gov (United States)

Miller, David N.; George, Michael P.; Fogt, Julie B.

2005-01-01

There has recently been increased attention given to the widely perceived gap between research and practice in school psychology and education. The purpose of this article is to describe how Centennial School of Lehigh University, an alternative day school for students with emotional and behavioral disorders, was able to successfully implement and…

The innovation and tradition of science: centennial of academician Ho Zah-Wei

International Nuclear Information System (INIS)

Liu Xiao

2014-01-01

This article reviews Mrs. Ho Zah-Wei's academic experiences in several different aspects. She inherited the idea of 'Saving the Nation by Science' from older scholars such as Cai Yuanpei. Receiving advanced scientific education and discipline, she made the important innovation through international communication and collaboration. After returned to China, She took part in the foundation of the Chinese nuclear science, assembled and trained many prominent scientists. To commemorate her centennial, we should not only cherish her scientific innovation and undertaking, but also develop her scientific spirit and tradition. (authors)

The Southern Ocean as a driver of centennial to millenial timescale radiocarbon variations

Science.gov (United States)

Rodgers, K. B.; Bianchi, D.; Galbraith, E.; Gnanadesikan, A.; Iudicone, D.; Mikaloff Fletcher, S.; Sarmiento, J. L.; Slater, R. D.

2009-04-01

Paleo-proxy records reveal large delta-c14 variations for both the atmosphere and the ocean on centennial to millenial timescales. One of the most pronounced examples is the onset phase of the Younger Dryas, when atmospheric delta-c14 rose by 70 per mil in only 200 years. Another is the most recent deglaciation (and the associated "Mystery Interval"). Many of the significant centennial to millenial transients in atmospheric delta-c14 are reflected in ocean interior delta-c14 at intermediate depths in the Pacific over the last 50kyrs. An ocean model has been used to test the idea that only modest perturbations to Southern Ocean winds provides a means to link the oceanic and atmospheric delta-c14 variations. Perturbations to the winds over the Southern Ocean are able to drive sizable decoupling of the fluxes of 14CO2 and 12CO2 over the Southern Ocean, thus modifying atmospheric delta-c14. These same perturbations are able to perturb rapidly the depth of intermediate water horizons in the North Pacific through the passage of baroclinic planetary (Rossby) waves. This sensitivity is significantly stronger than what previous studies have found for perturbations to the Meridional Overturning Circulation (MOC) in the North Atlantic. It is suggested that delta-c14 may provide a powerful tracer for understanding past variations in the climate system.

Centennial-scale vegetation and climate changes in the Middle Atlas, Morocco: new insights from multi-proxy investigations at Lake Sidi Ali

Science.gov (United States)

Fletcher, William; Campbell, Jennifer; Joannin, Sebastien; Mischke, Steffen; Zielhofer, Christoph; de Batist, Marc; Mikdad, Abdes

2016-04-01

The karstic lakes of the Middle Atlas, Morocco, represent a valuable archive of environmental and climatic change for Northwest Africa. Here we present the results of centennial-scale palynological and charcoal analyses as part of a multiproxy palaeolimnological study of sediment cores from Lake Sidi Ali in the Middle Atlas, Morocco (33° 03 N, 05° 00 W; 2,080 m a.s.l.). Supported by absolute dating including 23 more than twenty AMS 14C dates on pollen concentrates, the record covers the entire Holocene and offers insights into vegetation and climate change at a regionally unprecedented centennial-scale. Pollen assemblages are dominated by steppic herbs, evergreen oaks (Quercus), junipers (Cupressaceae) and Atlantic cedar (Cedrus atlantica). A long-term evolution of the montane vegetation is recorded, reflecting progressive changes in the dominant arboreal taxa and leading to the full establishment of the emblematic cedar forests of the area during the mid-Holocene by 6000 cal BP. Orbital-scale changes in seasonality and growing season moisture availability linked to declining summer insolation are implicated, with a transition from (a) warm, dry summers associated with summer drought tolerant taxa especially evergreen Quercus, high algal productivity in the lake, and high background levels of microcharcoal reflecting distant fire activity during the early Holocene, to (b) cool, relatively humid summers with dominance of montane conifers, declining algal productivity in the lake, and episodic local fire activity during the mid- to late Holocene. Superimposed on the long-term environmental changes are recurrent centennial-scale fluctuations in vegetation composition, reflecting competitive dynamics between the major taxa, initially between steppic and arboreal elements, and later between the major tree taxa. Parallels with hydrological proxies including stable O and C isotopes suggest common responses to climatic drivers (fluctuations in moisture sources and

National Calendar-2009

Science.gov (United States)

Ghedrovici, Vera; Svet, Maria; Matvei, Valeria; Perju, Elena; Sargun, Maria; Netida, Maria

2009-10-01

The calendar represents a few hundreds of biographies of scientists, artists and writers from everywhere, printed in chronological order and adjusted to their birthdays. A number of international and national holydays, including some refering to science are included in the Calendar. A great deffect of the Calendar is the introduction in the list of holydays of the "international day of astrology". Another defect is the absence of the indication of the membership to Communist Parties for persons cited from the former USSR and former Communist Countries. The following physicists, astronomers and mathematicians had biographies in the actual issue: Kon, Lia Z., Arnautov, Vladimir I. (math), Tsukerblat, B., Kapitza, P., Donici (Donitch), N.N., Sklodowska-Curie, Maria, da Vinci, Leonardo, Birkhof, George David, Galilei, Galileo, Pisarzhveskij, Lev (chemist), Mossbauer, Rudolf Ludwig, Clochisner (Klokishner), Sofia I., Miscoi (Mishkoy), Gh. (Math), Mendel, Gregor Lohan (genet.), Glavan, Vasile (math), Chetrus (Ketrush), P. (chem), Bostan, Ion (mech. eng.), Boltzmann, Ludwig Ed.

Newton’s apple and other myths about science

CERN Document Server

Kampourakis, Kostas

2015-01-01

A falling apple inspired Isaac Newton’s insight into the law of gravity—or so the story goes. Is it true? Perhaps not. But the more intriguing question is why such stories endure as explanations of how science happens. Newton’s Apple and Other Myths about Science brushes away popular misconceptions to provide a clearer picture of great scientific breakthroughs from ancient times to the present. Among the myths refuted in this volume is the idea that no science was done in the Dark Ages, that alchemy and astrology were purely superstitious pursuits, that fear of public reaction alone led Darwin to delay publishing his theory of evolution, and that Gregor Mendel was far ahead of his time as a pioneer of genetics. Several twentieth-century myths about particle physics, Einstein’s theory of relativity, and more are discredited here as well. In addition, a number of broad generalizations about science go under the microscope of history: the notion that religion impeded science, that scientists typically a...

The role of radiation induced mutations in crop Improvement

International Nuclear Information System (INIS)

Souframanien, J.

2017-01-01

Sudden, heritable changes in the genetic material, DNA, are known as mutations. Selection of naturally occurring mutations in wild, ancestral species helped humans in the domestication and further improvement of today's crop plants. Gregor Mendel in 1865 used several such natural mutants in his experiments with garden pea to formulate the laws of inheritance. The term mutation itself was used for the first time by Hugo de Vries in 1901 in his mutation theory. Plant breeding based on the science of genetics, as practiced over the past 100 years, exploited the available genetic variability in the primary gene pool of crop plants, and sometimes in related species. Primarily, simple selection of desirable offspring and cross breeding were the earlier methods of breeding and this utilized the occurrence of spontaneous mutations. In nature, occurrence of natural variability in the form of spontaneous mutations is extremely low (about 10 -6 ), which can be enhanced several fold (∼10 -3 ) by using ionizing radiations or chemical mutagens

The meganism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity

NARCIS (Netherlands)

Friedrich, T.; Timmermann, A.; Menviel, L.; Elison Timm, O.; Mouchet, A.; Roche, D.M.V.A.P.

2010-01-01

The mechanism triggering centennial-to-millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obliquity values (∼22.1 )

Influence of the webbing produced by Oligonychus ilicis (McGregor) (Acari: Tetranychidae) on associated predatory phytoseiids; Influencia da teia de Oligonychus ilicis (McGregor) (Acari: Tetranychidae) sobre os fitoseideos predadores associados

Energy Technology Data Exchange (ETDEWEB)

Franco, Renato A. [Bioagri Laboratorios Ltda., Piracicaba, SP (Brazil)], e-mail: r.franco@bioagri.com.br; Reis, Paulo R. [Empresa de Pesquisa Agropecuaria de Minas Gerais (EPAMIG), Belo Horizonte, MG (Brazil). Ecocentro], e-mail: paulo.rebelles@epamig.ufla.br; Zacarias, Mauricio S. [EMBRAPA Cafe, Lavras, MG (Brazil)], e-mail: zacarias@epamig.ufla.br; Oliveira, Daniel C. [Universidade Federal de Lavras (UFLA), MG (Brazil)

2010-01-15

Oligonychus ilicis (McGregor) is among those mite species that can cause damage to coffee plants (Coffea spp.). Species of Phytoseiidae acari are considered the most important and studied predatory mites. The objective of this study was to evaluate the effects of the webbing produced by O. ilicis on its predation by females of the phytoseiids Iphiseiodes zuluagai Denmark and Muma, Euseius citrifolius Denmark and Muma and Amblyseius herbicolus (Chant). Four bioassays were conducted, with three treatments and ten replicates. Each replicate consisted of 25 O. ilicis per experimental unit (a leaf disc of Coffea arabica) according to the tested developmental stage, in independent experiments. To spin the web, 15 adult females were put on each experimental unit for 24h; females were then removed, leaving only the web, and predators and prey to be tested were introduced. Predation was assessed after 24h. In the presence of webbing, the consumption of eggs, larvae and nymphs by I. zuluagai and eggs and larvae by E. citrifolius was lower. For A. herbicolus, egg predation was lower, but larval predation did not vary significantly and predation of nymphs and adults was higher in the presence of webbing. Predators as a whole were more efficient consuming larvae regardless of the presence of webbing. Considering the stages of O. ilicis altogether, webbing reduced the predation potential of I. zuluagai and E. citrifolius, but not of A. herbicolus. (author)

Mexican Childhood in Both National Independence Centennials (Mexico City, 1910 and 1921

Directory of Open Access Journals (Sweden)

Sergio Moreno Juárez

2012-07-01

Full Text Available This essay analyzes the peculiar way in which Mexican childhood was linked to historical memory during the commemoration of the first two national independence centennials (1910 and 1921, for these two historical divides represent not only the tremendous festivities of each celebrating regime, but also an essential part in the process of building national culture and identity in modern Mexico. Seen from the viewpoint, the celebrations become a kind of showcase for the pedagogical and hygienic structure deployed by the regimes of Porfirio Díaz and Obregón in order to shape subjectively and ideally their future citizens.

Involvement of Three Esterase Genes from Panonychus citri (McGregor in Fenpropathrin Resistance

Directory of Open Access Journals (Sweden)

Xiao-Min Shen

2016-08-01

Full Text Available The citrus red mite, Panonychus citri (McGregor, is a major citrus pest with a worldwide distribution and an extensive record of pesticide resistance. However, the underlying molecular mechanism associated with fenpropathrin resistance in this species have not yet been reported. In this study, synergist triphenyl phosphate (TPP dramatically increased the toxicity of fenpropathrin, suggesting involvement of carboxylesterases (CarEs in the metabolic detoxification of this insecticide. The subsequent spatiotemporal expression pattern analysis of PcE1, PcE7 and PcE9 showed that three CarEs genes were all over-expressed after insecticide exposure and higher transcripts levels were observed in different field resistant strains of P. citri. Heterologous expression combined with 3-(4,5-dimethyl-thiazol-2-yl-2,5-diphenyltetra-zolium bromide (MTT cytotoxicity assay in Spodoptera frugiperda (Sf9 cells revealed that PcE1-, PcE7- or PcE9-expressing cells showed significantly higher cytoprotective capability than parental Sf9 cells against fenpropathrin, demonstrating that PcEs probably detoxify fenpropathrin. Moreover, gene silencing through the method of leaf-mediated dsRNA feeding followed by insecticide bioassay increased the mortalities of fenpropathrin-treated mites by 31% (PcE1, 27% (PcE7 and 22% (PcE9, respectively, after individual PcE gene dsRNA treatment. In conclusion, this study provides evidence that PcE1, PcE7 and PcE9 are functional genes mediated in fenpropathrin resistance in P. citri and enrich molecular understanding of CarEs during the resistance development of the mite.

NASA Centennial Challenge: Three Dimensional (3D) Printed Habitat, Phase 2

Science.gov (United States)

Mueller, Robert P.; Roman, Monserrate C.; Kim, Hong S.

2017-01-01

The NASA Centennial Challenges: 3D-Printed Habitat Challenge seeks to develop the fundamental technologies necessary to manufacture an off-world habitat using mission recycled materials andor local indigenous materials. The vision is that autonomous habitat manufacturing machines will someday be deployed to the Moon or Mars to construct shelters for human habitation.NASA and Bradley University, are holding a new US$ 2.5 million competition to design and build a 3-D printed habitat for deep space exploration, including the agencys journey to Mars.The multi-phase 3-D Printed Habitat Challenge, part of NASA's Centennial Challenges program, is designed to advance the additive construction technology needed to create sustainable housing solutions for Earth and beyond.The first phase of the competition ran through Sept. 27, 2015. This phase, a design competition, called on participants to develop state-of-the-art architectural concepts that take advantage of the unique capabilities 3-D printing offers. The top 3 prizes with a prize purse of $40,000 were awarded at the 2015 World Maker Faire in New York.The second phase of the competition is called the Structural Member Competition and it is divided into three levels happening in the spring and summer of 2017. The Compression Test Competition (Level 1) focuses on the fabrication technologies needed to manufacture structural components from a combination of indigenous materials and recyclables, or indigenous materials alone. For Level 1, teams will develop 3D printable materials, build a 3D printing machine, and print two specimens: a truncated cone and a cylinder. The Level 2 Beam Member Competition is the second of three sub-competitions within the overall Structural Member Competition. For Level 2, teams will print a beam that will be tested.The Level 3 Head to Head Competition is the third of three sub-competitions within the overall Structural Member Competition. For Level 3, teams will develop 3D printable materials

Diffusive insights: on the disagreement of Christian Bohr and August Krogh at the Centennial of the Seven Little Devils

DEFF Research Database (Denmark)

Gjedde, Albert

2010-01-01

The year 2010 is the centennial of the publication of the “Seven Little Devils” in the predecessor of Acta Physiologica. In these seven papers, August and Marie Krogh sought to refute Christian Bohr's theory that oxygen diffusion from the lungs to the circulation is not entirely passive but rather...

Centennial-scale records of total organic carbon in sediment cores from the South Yellow Sea, China

Science.gov (United States)

Zhu, Qing; Lin, Jia; Hong, Yuehui; Yuan, Lirong; Liu, Jinzhong; Xu, Xiaoming; Wang, Jianghai

2018-01-01

Global carbon cycling is a significant factor that controls climate change. The centennial-scale variations in total organic carbon (TOC) contents and its sources in marginal sea sediments may reflect the influence of human activities on global climate change. In this study, two fine-grained sediment cores from the Yellow Sea Cold Water Mass of the South Yellow Sea were used to systematically determine TOC contents and stable carbon isotope ratios. These results were combined with previous data of black carbon and 210Pb dating from which we reconstructed the centennial-scale initial sequences of TOC, terrigenous TOC (TOCter) and marine autogenous TOC (TOCmar) after selecting suitable models to correct the measured TOC (TOCcor). These sequences showed that the TOCter decreased with time in the both cores while the TOCmar increased, particularly the rapid growth in core H43 since the late 1960s. According to the correlation between the Huanghe (Yellow) River discharge and the TOCcor, TOCter, or TOCmar, we found that the TOCter in the two cores mainly derived from the Huanghe River and was transported by it, and that higher Huanghe River discharge could strengthen the decomposition of TOCmar. The newly obtained initial TOC sequences provide important insights into the interaction between human activities and natural processes.

On the Origin of Multidecadal to Centennial Greenland Temperature Anomalies Over the Past 800 yr

Science.gov (United States)

Kobashi, T.; Shindell, D. T.; Kodera, K.; Box, J. E.; Nakaegawa, T.; Kawamura, K.

2013-01-01

The surface temperature of the Greenland ice sheet is among the most important climate variables for assessing how climate change may impact human societies due to its association with sea level rise. However, the causes of multidecadal-to-centennial temperature changes in Greenland temperatures are not well understood, largely owing to short observational records. To examine these, we calculated the Greenland temperature anomalies (GTA[G-NH]) over the past 800 yr by subtracting the standardized northern hemispheric (NH) temperature from the standardized Greenland temperature. This decomposes the Greenland temperature variation into background climate (NH); polar amplification; and regional variability (GTA[G-NH]). The central Greenland polar amplification factor as expressed by the variance ratio Greenland/NH is 2.6 over the past 161 yr, and 3.3-4.2 over the past 800 yr. The GTA[G-NH] explains 31-35%of the variation of Greenland temperature in the multidecadal-to-centennial time scale over the past 800 yr. We found that the GTA[G-NH] has been influenced by solar-induced changes in atmospheric circulation patterns such as those produced by the North Atlantic Oscillation/Arctic Oscillation (NAO/AO). Climate modeling and proxy temperature records indicate that the anomaly is also likely linked to solar-paced changes in the Atlantic meridional overturning circulation (AMOC) and associated changes in northward oceanic heat transport.

On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr

Directory of Open Access Journals (Sweden)

T. Kobashi

2013-03-01

Full Text Available The surface temperature of the Greenland ice sheet is among the most important climate variables for assessing how climate change may impact human societies due to its association with sea level rise. However, the causes of multidecadal-to-centennial temperature changes in Greenland temperatures are not well understood, largely owing to short observational records. To examine these, we calculated the Greenland temperature anomalies (GTA[G-NH] over the past 800 yr by subtracting the standardized northern hemispheric (NH temperature from the standardized Greenland temperature. This decomposes the Greenland temperature variation into background climate (NH; polar amplification; and regional variability (GTA[G-NH]. The central Greenland polar amplification factor as expressed by the variance ratio Greenland/NH is 2.6 over the past 161 yr, and 3.3–4.2 over the past 800 yr. The GTA[G-NH] explains 31–35% of the variation of Greenland temperature in the multidecadal-to-centennial time scale over the past 800 yr. We found that the GTA[G-NH] has been influenced by solar-induced changes in atmospheric circulation patterns such as those produced by the North Atlantic Oscillation/Arctic Oscillation (NAO/AO. Climate modeling and proxy temperature records indicate that the anomaly is also likely linked to solar-paced changes in the Atlantic meridional overturning circulation (AMOC and associated changes in northward oceanic heat transport.

The Centennial Trends Greater Horn of Africa precipitation dataset

Science.gov (United States)

Funk, Chris; Nicholson, Sharon E.; Landsfeld, Martin F.; Klotter, Douglas; Peterson, Pete J.; Harrison, Laura

2015-01-01

East Africa is a drought prone, food and water insecure region with a highly variable climate. This complexity makes rainfall estimation challenging, and this challenge is compounded by low rain gauge densities and inhomogeneous monitoring networks. The dearth of observations is particularly problematic over the past decade, since the number of records in globally accessible archives has fallen precipitously. This lack of data coincides with an increasing scientific and humanitarian need to place recent seasonal and multi-annual East African precipitation extremes in a deep historic context. To serve this need, scientists from the UC Santa Barbara Climate Hazards Group and Florida State University have pooled their station archives and expertise to produce a high quality gridded ‘Centennial Trends’ precipitation dataset. Additional observations have been acquired from the national meteorological agencies and augmented with data provided by other universities. Extensive quality control of the data was carried out and seasonal anomalies interpolated using kriging. This paper documents the CenTrends methodology and data.

Centennial-scale links between Atlantic Ocean dynamics and hydroclimate over the last 4400 years: Insights from the northern Gulf of Mexico

Science.gov (United States)

Thirumalai, K.; Quinn, T. M.; Okumura, Y.; Richey, J. N.; Partin, J. W.; Poore, R. Z.

2015-12-01

Surface circulation in the Atlantic Ocean is an important mediator of global climate and yet its variability is poorly constrained on centennial timescales. Changes in the Atlantic meridional overturning circulation (AMOC) have been implicated in late Holocene climate variability in the Western Hemisphere, although the relationship between AMOC variability and hydroclimate is uncertain due to the lack of sufficiently highly resolved proxy records. Here we present a replicated reconstruction of sea-surface temperature (SST) and salinity (SSS) from the Garrison Basin in the northern Gulf of Mexico (NGOM) spanning the last 4,400 years to better constrain past sea-surface conditions. We generated time series of paired Mg/Ca (SST proxy) and δ18O (SST and SSS proxy) variations in planktic foraminifer Globigerinoides ruber (white variety) from three multi-cores collected in 2010. Using a Monte Carlo-based technique we produce a stacked record from the three multi-cores and constrain analytical, calibration, chronological, and sampling uncertainties. We apply this technique to existing paired Mg/Ca- δ18O studies in the Gulf of Mexico and Atlantic Ocean to facilitate comparison between time-uncertain proxy reconstructions. The Garrison Basin stack exhibits large centennial-scale variability (σSST~0.6°C; δ18Osw~0.17‰) and indicates a substantially cool (0.9±0.5°C) and fresh (0.26±0.1‰) Little Ice Age (LIA; 1450-1850 A.D.), corroborating extant records from the Gulf of Mexico. Focusing on the last millennium, we analyze a suite of oceanic and terrestrial proxy records to demonstrate a centennial-scale link between salt advection in the Atlantic Ocean, a diagnostic parameter of ocean circulation, and hydroclimate in the adjacent continents. The ensuing multiproxy relationships seem to be consistent with spatial field correlations of limited salinity and rainfall instrumental/reanalysis data, which suggest that NGOM salinity varies with large-scale Atlantic Ocean

A 28,000 year history of vegetation and climate from Lower Red Rock Lake, Centennial Valley, Southwestern Montana, USA

Science.gov (United States)

Mumma, Stephanie Ann; Whitlock, Cathy; Pierce, Kenneth

2012-01-01

A sediment core extending to 28,000 cal yr BP from Lower Red Rock Lake in the Centennial Valley of southwestern Montana provides new information on the nature of full-glacial vegetation as well as a history of late-glacial and Holocene vegetation and climate in a poorly studied region. Prior to 17,000 cal yr BP, the eastern Centennial Valley was occupied by a large lake (Pleistocene Lake Centennial), and valley glaciers were present in adjacent mountain ranges. The lake lowered upon erosion of a newly formed western outlet in late-glacial time. High pollen percentages of Juniperus, Poaceae, Asteraceae, and other herbs as well as low pollen accumulation rates suggest sparse vegetation cover. Inferred cold dry conditions are consistent with a strengthened glacial anticyclone at this time. Between 17,000 and 10,500 cal yr BP, high Picea and Abies pollen percentages suggest a shift to subalpine parkland and warmer conditions than before. This is attributed to the northward shift of the jet stream and increasing summer insolation. From 10,500 to 7100 cal yr BP, pollen evidence of open dry forests suggests warm conditions, which were likely a response to increased summer insolation and a strengthened Pacific subtropical high-pressure system. From 7100 to 2400 cal yr BP, cooler moister conditions promoted closed forest and wetlands. Increases in Picea and Abies pollen percentages after 2400 cal yr BP suggest increasing effective moisture. The postglacial pattern of Pseudotsuga expansion indicates that it arrived later on the Atlantic side of the Continental Divide than on the Pacific side. The Divide may have been a physical barrier for refugial populations or it delimited different climate regions that influenced the timing of Pseudotsuga expansion.

Diffusive Insights: On the Disagreement of Christian Bohr and August Krogh at the Centennial of the Seven Little Devils

Science.gov (United States)

Gjedde, Albert

2010-01-01

The year 2010 is the centennial of the publication of the "Seven Little Devils" in the predecessor of "Acta Physiologica". In these seven papers, August and Marie Krogh sought to refute Christian Bohr's theory that oxygen diffusion from the lungs to the circulation is not entirely passive but rather facilitated by a specific cellular activity…

Tropical Pacific forcing on decadal-to-centennial NAO-dominated precipitation variability in northern Mediterranean over the past 6500 years

Science.gov (United States)

Hu, H. M.; Shen, C. C.; Michel, V.; Jiang, X.; Mii, H. S.; Wang, Y.; Valensi, P.

2017-12-01

We present a multi-annual-resolved absolute-dated stalagmite-inferred precipitation record, with age precision as good as ±2 years, from northern Italy, to reflect North Atlantic Oscillation (NAO) dynamics since 6.5 ka (thousand years ago, before 1950 C.E.). Our record features millennial precipitation fluctuations punctuated by several centennial-scale drought periods centered at 5.6, 6.2, 4.2, 3.0 and 2.3 ka. The phase relationship with previous NAO-sensitive records suggests a multi-millennial southward migration of the northern Westerlies and enhanced NAO variability from the middle- to late-Holocene. We also found the multi-decadal to centennial rainfall amount could dramatically vary within few decades, possibly affecting ancient Mediterranean civilizations. Concurrence between northern Mediterranean precipitation and western tropical Pacific sea surface temperature records suggests the remote forcing on this NAO-dominated rainfall. We argue that the irregular NAO change nowadays could be related to high frequency of El Niño-Southern Oscillation events and might cause an inevitable abrupt hydroclimate change and irreparable impacts on the regional human society in the near future.

'Candidatus Rickettsia mendelii', a novel basal group rickettsia detected in Ixodes ricinus ticks in the Czech Republic.

Science.gov (United States)

Hajduskova, Eva; Literak, Ivan; Papousek, Ivo; Costa, Francisco B; Novakova, Marketa; Labruna, Marcelo B; Zdrazilova-Dubska, Lenka

2016-04-01

A novel rickettsial sequence in the citrate synthase gltA gene indicating a novel Rickettsia species has been detected in 7 out of 4524 Ixodes ricinus ticks examined within several surveys performed in the Czech Republic from 2005 to 2009. This new Candidatus Rickettsia sp. sequence has been found in 2 nymphs feeding on wild birds (Luscinia megarhynchos and Erithacus rubecula), in a male tick from vegetation, and 4 ticks feeding on a dog (3 males, 1 female tick). Portions of the ompA, ompB, sca4, and htrA genes were not amplifiable in these samples. A maximum likelihood tree of rickettsiae based on comparisons of partial amino acid sequences of citrate synthase and nucleotide sequences of 16S rDNA genes and phylogenetic analysis revealed a basal position of the novel species in the proximity of R. bellii and R. canadensis. The novel species has been named 'Candidatus Rickettsia mendelii' after the founder of genetics, Gregor Mendel. Copyright © 2016 Elsevier GmbH. All rights reserved.

Influence of the webbing produced by Oligonychus ilicis (McGregor) (Acari: Tetranychidae) on associated predatory phytoseiids

International Nuclear Information System (INIS)

Franco, Renato A.; Reis, Paulo R.; Oliveira, Daniel C.

2010-01-01

Oligonychus ilicis (McGregor) is among those mite species that can cause damage to coffee plants (Coffea spp.). Species of Phytoseiidae acari are considered the most important and studied predatory mites. The objective of this study was to evaluate the effects of the webbing produced by O. ilicis on its predation by females of the phytoseiids Iphiseiodes zuluagai Denmark and Muma, Euseius citrifolius Denmark and Muma and Amblyseius herbicolus (Chant). Four bioassays were conducted, with three treatments and ten replicates. Each replicate consisted of 25 O. ilicis per experimental unit (a leaf disc of Coffea arabica) according to the tested developmental stage, in independent experiments. To spin the web, 15 adult females were put on each experimental unit for 24h; females were then removed, leaving only the web, and predators and prey to be tested were introduced. Predation was assessed after 24h. In the presence of webbing, the consumption of eggs, larvae and nymphs by I. zuluagai and eggs and larvae by E. citrifolius was lower. For A. herbicolus, egg predation was lower, but larval predation did not vary significantly and predation of nymphs and adults was higher in the presence of webbing. Predators as a whole were more efficient consuming larvae regardless of the presence of webbing. Considering the stages of O. ilicis altogether, webbing reduced the predation potential of I. zuluagai and E. citrifolius, but not of A. herbicolus. (author)

Side Effects of Four Acaricides on the Predatory Mites of Neoseiulus californicus McGregor and Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae

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Sibel YORULMAZ SALMAN

2017-01-01

Full Text Available In the present study determined the side effects of four acaricides of acequinocyl, etoxazole, bifenazate and milbemectin on the predator mites Phytoseiulus persimilis Athias-Henriot and Neoseiulus californicus McGregor. Acaricide concentrations were prepared as a two times the field application dose (2T, field application dose (T, and half of the field application dose (T/2 and were then applied on eggs, nymphs and adults of the P. persimilis and N. californicus. The side effects of the acaricidesapplied to the predator mites were determined three, five and seven days afterthe application. While all doses of acequinocyl and etoxazole showed a higher toxic effect on N.californicus eggs, it was found that bifenazate and milbemectin caused similar effects on both predator mite eggs. Furthermore, it was found that the toxic effects of acequinocyl, etoxazole, bifenazate and milbemectin on nymphs and adults of the predator miteswere high seventh day after the application. The results of the study showed that four acaracides frequently used against to pest mites, should be used more carefully in the agricultural areas.

Centennial inventory: the changing face of orthodontics.

Science.gov (United States)

Ghafari, Joseph G

2015-11-01

The American Journal of Orthodontics and Dentofacial Orthopedics celebrates its centennial, safeguarded by the nearly 115-year-old American Association of Orthodontists. This journey witnessed the rise and demise of various developments, concepts, and procedures, while basic knowledge is still needed. Various periods can be defined in the past century, but the goals remain to obtain more accurate diagnosis through precise anatomic imaging, more controlled and faster tooth movement, more discreet appliances, and the balance of esthetics, function, and stability. The most recent technologic advances have buttressed these goals. Cone-beam computed tomography has brought 3-dimensional assessment to daily usage, albeit the original enthusiasm is tempered by the risk of additional radiation. Temporary anchorage devices or miniscrews have revolutionized orthodontic practice and loom as a solid cornerstone of orthodontic science. Decortication and microperforation promise to speed up tooth displacement by stimulating vascularization. The concept of the regional acceleratory phenomenon has touched upon even the timing of orthognathic surgery. The burden of esthetic appliances remains, with the demand for "cosmetic" appliances and clear aligners. Have these developments changed the face of orthodontics? Have we engaged in another turn wherein certain treatment modalities may fade, while others join mainstream applications? These questions are addressed in this essay on the challenges, promises, and limitations of current orthodontic technology, enhancement of biologic response, and personalized treatment approaches. Copyright © 2015 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

South America Monsoon variability on millennial to multi-centennial time scale during the Holocene in central eastern Brazil

Science.gov (United States)

Strikis, N. M.; Cruz, F. W.; Cheng, H.; Karmann, I.; Vuille, M.; Edwards, R.; Wang, X.; Paula, M. S.; Novello, V. F.; Auler, A.

2011-12-01

A paleoprecipitation reconstruction based on high resolution and well-dated speleothem oxygen isotope records shows that the monsoon precipitation over central eastern Brazil underwent to strong variations on millennial to multi-centennial time-scales during the Holocene. This new record indicates that abrupt events of increase in monsoon precipitation are correlated to Bond events 6, 5 and 4 and also with 8.2 ky event during the early and mid-Holocene, with a mean amplitude of 1.5 % (PDB). The pacing and structure of such events are general consistent with variations in solar activity suggested by atmospheric Δ14 C records. In the late-Holocene, abrupt events of increase in monsoon precipitation peaking at 3.2, 2.7 and 2.3 ky B.P. are approximately synchronous with periods of low solar minima. In this regard, the most prominent event occurred during the late Holocene occurred at ~2.7 ky B.P. In addition, these positive anomalies of the precipitation recorded in central eastern Brazil are also in good agreement with variations in Titicaca lake level. The good correspondence between the speleothem and marine records imply that the variations in the north Atlantic sea surface temperature is the main forcing for abrupt millennial to multi-centennial precipitations variation within the region under influence of South American Monsoon.

Reconquering the Americas in order to Regenerate Europe. Spanish Nationalism and American Inde- pendence Centennials in 1910-1911

OpenAIRE

Javier Moreno Luzón

2010-01-01

This article analyzes Spanish participation in the centennial celebration  of several American  independencies in 1910-1911 (those of Argentina,  Mexico, Chile and Venezuela). The recurring issues of Spanish nationalism  of that time are studied,  inclu- ding the need to “regenerate” Spain after the 1898 disaster, by adopting a “hispanoamericanist” language. The author also describes the initiatives of several immigrant  collectivities in these American  countries,  concerned  as they were ab...

Centennial Challenges Program Overview: How NASA Successfully Involves the General Public in the Solving of Current Technology Gaps

Science.gov (United States)

Roman, Monsi C.; Kim, Tony; Sudnik, Janet; Sivak, Amy; Porter, Molly; Cylar, Rosaling; Cavanaugh, Dominique; Krome, Kim

2017-01-01

The National Aeronautics and Space Administration (NASA) Centennial Challenges Program, part of the Space Technology Mission Directorate (STMD), addresses key technology needs of NASA and the nation, while facilitating new sources of innovation outside the traditional community. This is done by the direct engagement of the public at large, through the offering of Congressional authorized prize purses and associated challenges developed by NASA and the aerospace community and set up as a competition awarding the prize money for achieving the specified technology goal.

Toxicidade residual de alguns agrotóxicos recomendado na agricultura sobre Neoseiulus californicus (McGregor (Acari: Phytoseiidae Residual toxicity of some pesticides recommended for citrus orchards on the predaceous mite Neoseiulus californicus (McGregor (Acari: phytoseiidae

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Marcos Zatti da Silva

2007-04-01

Full Text Available O objetivo do trabalho foi avaliar a toxicidade residual de alguns agrotóxicos utilizados em citros sobre Neoseiulus californicus (McGregor em condições de laboratório. O método de bioensaio adotado foi o de contato residual. Folhas de citros da variedade Pêra, acondicionadas em arenas, foram pulverizadas em torre de Potter. A toxicidade residual dos produtos foi avaliada duas horas e 1; 3; 5; 7; 10; 14 e 21 dias após a aplicação. Em cada arena, foram transferidas dez fêmeas adultas de N. californicus, juntamente com uma quantidade suficiente de Tetranychus urticae, como fonte de alimento. As avaliações de mortalidade foram realizadas 72 horas após a transferência dos ácaros para as arenas. Os agrotóxicos acrinathrin, deltamethrin, dinocap, enxofre, fenpropathrin, óxido de fenbutatin e propargite não causaram mortalidades significativas em adultos de N. californicus. Foram registradas mortalidades de 29,8; 24,0 e 34,1% para ácaros N. californicus expostos a resíduos de duas horas de idade de abamectim, azocyclotin e cyhexatin, respectivamente. Dicofol, pyridaben e chlorfenapyr causaram 100% de mortalidade aos ácaros predadores expostos aos resíduos tóxicos dos acaricidas, com duas horas de idade. Abamectin provocou mortalidade significativa por um período inferior a um dia. Resíduos dos acaricidas azocyclotin, cyhexatin, dicofol, pyridaben e chlorfenapyr provocaram mortalidades significativas por períodos de 1; 1; 10; 10 e 21dias, respectivamente. Os resultados obtidos no presente experimento servem de subsídio para a escolha adequada dos agrotóxicos a serem utilizados em pomares de citros nos quais N. californicus esteja presente ou naqueles em que o predador venha a ser liberado. Esses resultados também servem para a escolha do momento mais favorável para a liberação dos ácaros predadores dessa espécie no campo, após a aplicação de agrotóxicos nos pomares. Estudos conduzidos em condições de campo ainda s

[Forum. Centennial of the birth of Josué de Castro: lessons from the past, reflections for the future. Introduction].

Science.gov (United States)

Batista Filho, Malaquias

2008-11-01

This article presents the main contributions by Josué de Castro (1908-1973), coinciding with the centennial of the birth of this outstanding thinker, researcher, and public figure dedicated to the struggle against hunger in Brazil and the world. His holistic view of the problem is highlighted, along with its historical roots and respective solutions. The reference is human development with a sustainable economic, social, and ecological basis and participatory process. Lessons from the past can and should be included on the current agenda of major issues faced by humankind.

Centennial-scale climate change from decadally-paced explosive volcanism: a coupled sea ice-ocean mechanism

Energy Technology Data Exchange (ETDEWEB)

Zhong, Y. [University of Colorado, INSTAAR, Boulder, CO (United States); Miller, G.H. [University of Colorado, INSTAAR, Boulder, CO (United States); University of Colorado, Department of Geological Sciences, Boulder, CO (United States); Otto-Bliesner, B.L.; Holland, M.M.; Bailey, D.A. [NCAR, Boulder, CO (United States); Schneider, D.P. [NCAR, Boulder, CO (United States); University of Colorado, CIRES, Boulder, CO (United States); Geirsdottir, A. [University of Iceland, Department of Earth Sciences and Institute of Earth Sciences, Reykjavik (Iceland)

2011-12-15

Northern Hemisphere summer cooling through the Holocene is largely driven by the steady decrease in summer insolation tied to the precession of the equinoxes. However, centennial-scale climate departures, such as the Little Ice Age, must be caused by other forcings, most likely explosive volcanism and changes in solar irradiance. Stratospheric volcanic aerosols have the stronger forcing, but their short residence time likely precludes a lasting climate impact from a single eruption. Decadally paced explosive volcanism may produce a greater climate impact because the long response time of ocean surface waters allows for a cumulative decrease in sea-surface temperatures that exceeds that of any single eruption. Here we use a global climate model to evaluate the potential long-term climate impacts from four decadally paced large tropical eruptions. Direct forcing results in a rapid expansion of Arctic Ocean sea ice that persists throughout the eruption period. The expanded sea ice increases the flux of sea ice exported to the northern North Atlantic long enough that it reduces the convective warming of surface waters in the subpolar North Atlantic. In two of our four simulations the cooler surface waters being advected into the Arctic Ocean reduced the rate of basal sea-ice melt in the Atlantic sector of the Arctic Ocean, allowing sea ice to remain in an expanded state for > 100 model years after volcanic aerosols were removed from the stratosphere. In these simulations the coupled sea ice-ocean mechanism maintains the strong positive feedbacks of an expanded Arctic Ocean sea ice cover, allowing the initial cooling related to the direct effect of volcanic aerosols to be perpetuated, potentially resulting in a centennial-scale or longer change of state in Arctic climate. The fact that the sea ice-ocean mechanism was not established in two of our four simulations suggests that a long-term sea ice response to volcanic forcing is sensitive to the stability of the seawater

Rates and fluxes of centennial-scale carbon storage in the fine-grained sediments from the central South Yellow Sea and Min-Zhe belt, East China Sea

Science.gov (United States)

Wang, Jianghai; Xiao, Xi; Zhou, Qianzhi; Xu, Xiaoming; Zhang, Chenxi; Liu, Jinzhong; Yuan, Dongliang

2018-01-01

The global carbon cycle has played a key role in mitigating global warming and climate change. Long-term natural and anthropogenic processes influence the composition, sources, burial rates, and fluxes of carbon in sediments on the continental shelf of China. In this study, the rates, fluxes, and amounts of carbon storage at the centennial scale were estimated and demonstrated using the case study of three fine-grained sediment cores from the central South Yellow Sea area (SYSA) and Min-Zhe belt (MZB), East China Sea. Based on the high-resolution temporal sequences of total carbon (TC) and total organic carbon (TOC) contents, we reconstructed the annual variations of historical marine carbon storage, and explored the influence of terrestrial and marine sources on carbon burial at the centennial scale. The estimated TC storage over 100 years was 1.18×108 t in the SYSA and 1.45×109 t in the MZB. The corrected TOC storage fluxes at the centennial scale ranged from 17 to 28 t/(km2·a)in the SYSA and from 56 to 148 t/(km2·a) in the MZB. The decrease of terrestrial materials and the increase of marine primary production suggest that the TOC buried in the sediments in the SYSA and MZB was mainly derived from the marine autogenetic source. In the MZB, two depletion events occurred in TC and TOC storage from 1985 to 1987 and 2003 to 2006, which were coeval with the water impoundment in the Gezhouba and Three Gorges dams, respectively. The high-resolution records of the carbon storage rates and fluxes in the SYSA and MZB reflect the synchronous responses to human activities and provide an important reference for assessing the carbon sequestration capacity of the marginal seas of China.

Natural Head Posture in the Setting of Sagittal Spinal Deformity: Validation of Chin-Brow Vertical Angle, Slope of Line of Sight, and McGregor's Slope With Health-Related Quality of Life.

Science.gov (United States)

Lafage, Renaud; Challier, Vincent; Liabaud, Barthelemy; Vira, Shaleen; Ferrero, Emmanuelle; Diebo, Bassel G; Liu, Shian; Vital, Jean-Marc; Mazda, Keyvan; Protopsaltis, Themistocles S; Errico, Thomas J; Schwab, Frank J; Lafage, Virginie

2016-07-01

The maintenance of horizontal gaze is an essential function of upright posture and global sagittal spinal alignment. Horizontal gaze is classically measured by the chin-brow vertical angle (CBVA), which is not readily measured on most lateral spine radiographs. To evaluate relations between CBVA and the slope of the line of sight, the slope of McGregor's line (McGS), and Oswestry Disability Index. Patients were identified from a single center database of 531 spine patients who underwent full-body EOS x-rays. Correlations between CBVA, the slope of the line of sight, and McGS were assessed. Using a quadratic regression with Oswestry Disability Index and CBVA, windows of low disability were identified. Comparison of sagittal spinopelvic parameters was carried out between patients with "ascending gaze" and "neutral position." Three hundred three patients were included (74% female, mean age 54.8 years, body mass index 26.6 ± 6.0 kg/m). CBVA strongly correlated with the slope of the line of sight (r = 0.996) and McGS (r = 0.862). Regression studies between Oswestry Disability Index and CBVA yielded a range of values corresponding to low disability (-4.7 degrees to 17.7 degrees). Similarly, a low disability range for the slope of the line of sight (-5.1 degrees to 18.5 degrees) and McGS (-5.7 degrees to 14.3 degrees) was computed. Patients with "ascending gaze" had a worse spinopelvic alignment than "neutral position" patients. The slope of the line of sight and McGS correlated strongly with CBVA and can be used as surrogate measures. The range of values for these measures corresponding to low disability was identified. These values can be used as a general guideline to assess alignment for diagnostic purposes. Cervical compensatory mechanism may modify the natural head position in sagittally misaligned patients. CBVA, chin-brow vertical angleHRQoL, health-related quality of lifeMcGS, slope of McGregor's lineODI, Oswestry Disability IndexSLs, slope of the line of sight.

Ripensare Darwin? Di ex‐aptations e neotenie. E di Topolino, Pippo e simpatiche salamandre messicane

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AMODIO, PAOLO

2016-12-01

Full Text Available Rethinking Darwin? About Ex‐aptations and Neotenies. Concerning Mickey Mouse, Goofy and likeable mexican Salamanders The theory of evolution by natural selection of Charles Darwin, whose first general exposure dates back to 1859, with the publication of the Origin of Species, is still a matter of intense debate among natural sciences’ scholars and philosophers. After the merger of Darwinian evolutionary research program with the theory of heredity of Gregor Mendel, the mathematical form of population genetics and the analysis of paleontological data (Modern Synthesis and the the important contributions of post-Darwinian authors such as S.J. Gould and N. Eldredge we are entering a new era of great discoveries and news. On the one hand, new data from genetics and paleoanthropology, on the other hand the impetuous development of some fields of applied science such as nanobiotechnology, genetic engineering and synthetic biology put us into the need and the urgency to underline, once again, the relevance and the extraordinary heuristic power of Darwinian research program, an even greater urgency since some authors have announced that we would be at a time to access a post-Darwinian and post-evolutionary era in which man as we actually know it is about to disappear.

Climate change-driven cliff and beach evolution at decadal to centennial time scales

Science.gov (United States)

Erikson, Li; O'Neill, Andrea; Barnard, Patrick; Vitousek, Sean; Limber, Patrick

2017-01-01

Here we develop a computationally efficient method that evolves cross-shore profiles of sand beaches with or without cliffs along natural and urban coastal environments and across expansive geographic areas at decadal to centennial time-scales driven by 21st century climate change projections. The model requires projected sea level rise rates, extrema of nearshore wave conditions, bluff recession and shoreline change rates, and cross-shore profiles representing present-day conditions. The model is applied to the ~470-km long coast of the Southern California Bight, USA, using recently available projected nearshore waves and bluff recession and shoreline change rates. The results indicate that eroded cliff material, from unarmored cliffs, contribute 11% to 26% to the total sediment budget. Historical beach nourishment rates will need to increase by more than 30% for a 0.25 m sea level rise (~2044) and by at least 75% by the year 2100 for a 1 m sea level rise, if evolution of the shoreline is to keep pace with rising sea levels.

Preface to anthropogenic fluvial sedimentation: Centennial celebration of G.K. Gilbert's Hydraulic-Mining Débris in the Sierra Nevada

Science.gov (United States)

James, L. Allan; Phillips, Jonathan D.; Lecce, Scott A.

2017-10-01

This special issue celebrates the centennial of the publication of G.K. Gilbert's (1917) monograph, Hydraulic-Mining Débris in the Sierra Nevada, U.S. Geological Survey Professional Paper 105 (PP105). Reasons to celebrate PP105 are manifold. It was the last of four classic monographs that Gilbert wrote in a career that spanned five decades. The monograph, PP105, introduced several important concepts and provided an integrated view of watersheds that was uncommon in its day. It also provided an extreme, lucid example of anthropogenic changes and legacy sediment and how to approach such large-scale phenomena from an objective, quantitative basis.

Non-preference of the red mite Oligonychus yothersi McGregor (Acari: Tetranychidae for oviposition on leaves of Paraguay tea progenies (Ilex paraguariensis/ Não-preferência do ácaro-vermelho, Oligonychus yothersi McGregor (Acari: Tetranychidae, para oviposição em folhas de progênies de erva-mate (Ilex paraguariensis

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José Djair Vendramim

2007-10-01

Full Text Available The oviposition preference of the red mite Oligonychus yothersi McGregor was evaluated under laboratory in 52 Paraguay tea progenies and one control collected in a local farm. The experiments were conducted on Paraguay tea leaf discs infested with one adult female mite/disc, incubated in a climate chamber (25±1ºC, 14h photophase for five days. Evaluations were performed daily, by counting the number of eggs laid in the period, the number of female escapes in the first 48 hours, as well as the number of eggs laid before the escaping. It was verified that discrimination by the mite occurred on two groups of progenies, in relation to the number of eggs: one group was different from the control (53.8% of the progenies and the other was identical to it (46.2% of the progenies. In the first group, 60.7% of progenies were less oviposited while a higher number of eggs/female than the control was verified in 39.3% of them. In 57.7% of progenies there was escape of some mites (10 to 40%, and in 10 of these progenies no eggs were laid. The data provide evidences that in some of the progenies evaluated there is resistance by non-preference to oviposition of the Paraguay tea red mite.A preferência para oviposição do ácaro-vermelho, Oligonychus yothersi McGregor, foi avaliada em condições de laboratório em 52 progênies de erva-mate e uma testemunha coletada em uma propriedade da região. Os experimentos foram realizados em discos foliares de erva-mate (2 cm de diâmetro, infestados com uma fêmea adulta do ácaro, e incubados a 25±1ºC e 14h de fotofase, durante cinco dias. As avaliações foram realizadas diariamente, contando-se o número de ovos depositados no período, número de fêmeas que fugiram nas primeiras 48 horas e número de ovos depositados antes da fuga. Verificou-se que houve discriminação do ácaro em dois grupos de progênies, em relação ao número de ovos, um que diferiu em relação à testemunha (53,8% de progênies e

Centennial eolian cyclicity in the Great Plains, USA: A dominant pattern of wind transport over the past 4000 years?

Science.gov (United States)

Schwalb, Antje; Dean, Walter E.; Fritz, C. Sherilyn; Geiss, Christoph E.; Kromer, Bernd

2010-01-01

Proxy evidence at decadal resolution from Late Holocene sediments from Pickerel Lake, northeastern South Dakota, shows distinct centennial cycles (400-700 years) in magnetic susceptibility; contents of carbonate, organic carbon, and major elements; abundance in ostracodes; and delta18O and delta13C values in calcite. Proxies indicate cyclic changes in eolian input, productivity, and temperature. Maxima in magnetic susceptibility are accompanied by maxima in aluminum and iron mass accumulation rates (MARs), and in abundances of the ostracode Fabaeformiscandona rawsoni. This indicates variable windy, and dry conditions with westerly wind dominance, including during the Medieval Climate Anomaly. Maxima in carbonates, organic carbon, phosphorous, and high delta13C values of endogenic calcite indicate moister and less windy periods with increased lake productivity, including during the Little Ice Age, and alternate with maxima of eolian transport. Times of the Maunder, Sporer and Wolf sunspot minima are characterized by maxima in delta18O values and aluminum MARs, and minima in delta13C values and organic carbon content. We interpret these lake conditions during sunspot minima to indicate decreases in lake surface water temperatures of up to 4-5 degrees C associated with decreases in epilimnetic productivity during summer. We propose that the centennial cycles are triggered by solar activity, originate in the tropical Pacific, and their onset during the Late Holocene is associated with insolation conditions driven by precession. The cyclic pattern is transmitted from the tropical Pacific into the atmosphere and transported by westerly winds into the North Atlantic realm where they strengthen the Atlantic Meridional Overturning Circulation during periods of northern Great Plains wind maxima. This consequently leads to moister climates in Central and Northern Europe. Thus, Pickerel Lake provides evidence for mechanisms of teleconnections including an atmospheric link

Life history of Neoseiulus californicus (McGregor, 1954 (Acari: Phytoseiidae fed with castor bean (Ricinus communisL. pollen in laboratory conditions

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PP Marafeli

Full Text Available The predatory mite, Neoseiulus californicus(McGregor, 1954 (Acari: Phytoseiidae is one of the principal natural enemies of tetranychid mites in several countries, promoting efficient control of those mites in several food and ornamental crops. Pest attacks such as that of the spider mite, Tetranychus urticaeKoch, 1836 (Acari: Tetranychidae, is one of the problems faced by farmers, especially in the greenhouse, due to the difficulty of its control with the use of chemicals because of the development of fast resistance making it hard to control it. The objective of this work was to study the life history of the predatory mite N. californicus as a contribution to its mass laboratory rearing, having castor bean plant [Ricinus communis L. (Euphorbiaceae] pollen as food, for its subsequent use as a natural enemy of T. urticae on a cultivation of greenhouse rosebushes. The studies were carried out in the laboratory, at 25 ± 2°C of temperature, 70 ± 10% RH and a 14 hour photophase. The biological aspects and the fertility life table were appraised. Longevity of 32.9 days was verified for adult females and 40.4 days for males. The intrinsic rate of increase (rm was 0.2 and the mean generation time (T was 17.2 days. The population doubled every 4.1 days. The results obtained were similar to those in which the predatory mite N. californicus fed on T. urticae.

THE CONDUCT OF THE DEFENSE: THE MOST DRAMATIC ERA FORM 1860 TO THE INDEPENDENCE CENTENNIAL

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MIGUEL NAVARRO MEZA

2018-01-01

Full Text Available This article describes the way political authorities conducted Defense and the political military relations between 1860 and the independence Centennial in 1910. In order to achieve that, and taking into account the factors that affect the conduct of defense in any given society, the domestic political scenario of the country at that time was seen as an stabilized institution and the dominance of liberalism as main political idea, thereafter the security environment of the republic is described in that period, as a very complex and difficult one. Following that, the political-military relations are balanced, stressing their doctrinal and juridical aspects, especially the ideas of Portales and the way in which are written down in the 1833 Constitution. Finally how the leadership view the conduct of the defense function, is considered within the parameters of a wider logic of the preeminent position of Chile in the local scenario, along with the pertinent conclusions.

The Antarctic Centennial Oscillation: A Natural Paleoclimate Cycle in the Southern Hemisphere That Influences Global Temperature

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W. Jackson Davis

2018-01-01

Full Text Available We report a previously-unexplored natural temperature cycle recorded in ice cores from Antarctica—the Antarctic Centennial Oscillation (ACO—that has oscillated for at least the last 226 millennia. Here we document the properties of the ACO and provide an initial assessment of its role in global climate. We analyzed open-source databases of stable isotopes of oxygen and hydrogen as proxies for paleo-temperatures. We find that centennial-scale spectral peaks from temperature-proxy records at Vostok over the last 10,000 years occur at the same frequencies (±2.4% in three other paleoclimate records from drill sites distributed widely across the East Antarctic Plateau (EAP, and >98% of individual ACOs evaluated at Vostok match 1:1 with homologous cycles at the other three EAP drill sites and conversely. Identified ACOs summate with millennial periodicity to form the Antarctic Isotope Maxima (AIMs known to precede Dansgaard-Oeschger (D-O oscillations recorded in Greenland ice cores. Homologous ACOs recorded at the four EAP drill sites during the last glacial maximum appeared first at lower elevations nearest the ocean and centuries later on the high EAP, with latencies that exceed dating uncertainty >30-fold. ACO homologs at different drill sites became synchronous, however, during the warmer Holocene. Comparative spectral analysis suggests that the millennial-scale AIM cycle declined in period from 1500 to 800 years over the last 70 millennia. Similarly, over the last 226 millennia ACO repetition period (mean 352 years declined by half while amplitude (mean 0.67 °C approximately doubled. The period and amplitude of ACOs oscillate in phase with glacial cycles and related surface insolation associated with planetary orbital forces. We conclude that the ACO: encompasses at least the EAP; is the proximate source of D-O oscillations in the Northern Hemisphere; therefore affects global temperature; propagates with increased velocity as temperature

Multidecadal, centennial, and millennial variability in sardine and anchovy abundances in the western North Pacific and climate-fish linkages during the late Holocene

Science.gov (United States)

Kuwae, Michinobu; Yamamoto, Masanobu; Sagawa, Takuya; Ikehara, Ken; Irino, Tomohisa; Takemura, Keiji; Takeoka, Hidetaka; Sugimoto, Takashige

2017-12-01

Paleorecords of pelagic fish abundance could better define the nature of fishery productivity dynamics and help understand responses of pelagic fish stocks to long-term climate changes. We report a high-resolution record of sardine and anchovy scale deposition rates (SDRs) from Beppu Bay, Southwest Japan, showing multidecadal and centennial variability in the abundance of Japanese sardine and Japanese anchovy during the last 2850 years. Variations in the sardine SDR showed periodicities at ∼50, ∼100, and ∼300 yr, while variations in the anchovy SDR showed periodicities at ∼30 and ∼260 yr. Comparisons between and correlation analyses of the time series of the sardine and anchovy SDRs demonstrate that there is not a consistent out-of-phase relationship during the last 2850 years. This indicates that the multidecadal alternations in the sardine and anchovy populations commonly seen in the 20th century did not necessarily occur during earlier periods. The Japanese sardine SDR record shows a long-term decreasing trend in the amplitudes of the multidecadal to centennial fluctuations. This decreasing trend may have resulted from an increasing trend in the winter sea surface temperature in the western North Pacific. The multicentennial variability in sardine abundance during the last millennium is consistent with the variabilities in the abnormal snow index in East Asia and the American tree ring-based Pacific Decadal Oscillation index, suggesting a basin-wide or regional climate-marine ecosystem linkage.

Centennial black carbon turnover observed in a Russia steppe soil

Energy Technology Data Exchange (ETDEWEB)

Hammes, K.; Torn, M.S.; Lapenas, A.G.; Schmidt, M.W.I.

2008-09-15

Black carbon (BC), from incomplete combustion of fuels and biomass, has been considered highly recalcitrant and a substantial sink for carbon dioxide. Recent studies have shown that BC can be degraded in soils. We use two soils with very low spatial variability sampled 100 years apart in a Russian steppe preserve to generate the first whole-profile estimate of BC stocks and turnover in the field. Quantities of fire residues in soil changed significantly over a century. Black carbon stock was 2.5 kg m{sup -2}, or about 7-10% of total organic C in 1900. With cessation of biomass burning, BC stocks decreased 25% over a century, which translates into a centennial soil BC turnover (293 years best estimate; range 182-541 years), much faster than so-called inert or passive carbon in ecosystem models. The turnover time presented here is for loss by all processes, namely decomposition, leaching, and erosion, although the latter two were probably insignificant in this case. Notably, at both time points, the peak BC stock was below 30 cm, a depth interval, which is not typically accounted for. Also, the quality of the fire residues changed with time, as indicated by the use benzene poly carboxylic acids (BPCA) as molecular markers. The proportions of less-condensed (and thus more easily degradable) BC structures decreased, whereas the highly condensed (and more recalcitrant) BC structures survived unchanged over the 100-year period. Our results show that BC cannot be assumed chemically recalcitrant in all soils, and other explanations for very old soil carbon are needed.

Multi-centennial Record of Labrador Sea Primary Productivity and Sea-Ice Variability Archived in Coralline Algal Ba/Ca

Science.gov (United States)

Chan, Phoebe; Halfar, Jochen; Adey, Walter; Hetzinger, Steffen; Zack, Thomas; Moore, Kent; Wortmann, Ulrich; Williams, Branwen; Hou, Alicia

2017-04-01

Arctic sea-ice thickness and concentration have dropped by approximately 9% per decade since 1978. Concurrent with this sea-ice decline is an increase in rates of phytoplankton productivity, driven by shoaling of the mixed layer and enhanced transmittance of solar radiation into the surface ocean. This has recently been confirmed by phytoplankton studies in Arctic and Subarctic basins that have revealed earlier timing, prolonged duration, and increased primary productivity of the spring phytoplankton bloom. However, difficulties of navigating in remote ice-laden waters and harsh polar climates have often resulted in short and incomplete records of in-situ plankton abundance in the northwestern Labrador Sea. Alternatively, information of past ocean productivity may be gained through the study of trace nutrient distributions in the surface water column. Investigations of dissolved barium (Ba) concentrations in the Arctic reveal significant depletions of Ba in surface seawaters due to biological scavenging during the spring phytoplankton bloom. Here we apply a barium-to-calcium (Ba/Ca) and carbon isotope (δ13C) multiproxy approach to long-lived crustose coralline algae in order to reconstruct an annually-resolved multi-centennial record of Labrador Sea productivity related to sea-ice variability in Labrador, Canada that extends well into the Little Ice Age (LIA; 1646 AD). The crustose coralline alga Clathromorphum compactum is a shallow marine calcareous plant that is abundant along the eastern Canadian coastline, and produces annual growth increments which allow for the precise calendar dating and geochemical sampling of hard tissue. Algal Ba/Ca ratios can serve as a promising new proxy for surface water productivity, demonstrating a close correspondence to δ13C that does not suffer from the anthropogenically-induced carbon isotope decline (ex. Suess Effect) beginning in the 1960s. Coralline algal Ba/Ca demonstrates statistically significant correlations to both

The Teleconnection of the Tropical Atlantic to Indo-Pacific Sea Surface Temperatures on Inter-Annual to Centennial Time Scales: A Review of Recent Findings

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Fred Kucharski

2016-02-01

Full Text Available In this paper, the teleconnections from the tropical Atlantic to the Indo-Pacific region from inter-annual to centennial time scales will be reviewed. Identified teleconnections and hypotheses on mechanisms at work are reviewed and further explored in a century-long pacemaker coupled ocean-atmosphere simulation ensemble. There is a substantial impact of the tropical Atlantic on the Pacific region at inter-annual time scales. An Atlantic Niño (Niña event leads to rising (sinking motion in the Atlantic region, which is compensated by sinking (rising motion in the central-western Pacific. The sinking (rising motion in the central-western Pacific induces easterly (westerly surface wind anomalies just to the west, which alter the thermocline. These perturbations propagate eastward as upwelling (downwelling Kelvin-waves, where they increase the probability for a La Niña (El Niño event. Moreover, tropical North Atlantic sea surface temperature anomalies are also able to lead La Niña/El Niño development. At multidecadal time scales, a positive (negative Atlantic Multidecadal Oscillation leads to a cooling (warming of the eastern Pacific and a warming (cooling of the western Pacific and Indian Ocean regions. The physical mechanism for this impact is similar to that at inter-annual time scales. At centennial time scales, the Atlantic warming induces a substantial reduction of the eastern Pacific warming even under CO2 increase and to a strong subsurface cooling.

500-year climate cycles stacking of recent centennial warming documented in an East Asian pollen record

Science.gov (United States)

Xu, Deke; Lu, Houyuan; Chu, Guoqiang; Wu, Naiqin; Shen, Caiming; Wang, Can; Mao, Limi

2014-01-01

Here we presented a high-resolution 5350-year pollen record from a maar annually laminated lake in East Asia (EA). Pollen record reflected the dynamics of vertical vegetation zones and temperature change. Spectral analysis on pollen percentages/concentrations of Pinus and Quercus, and a temperature proxy, revealed ~500-year quasi-periodic cold-warm fluctuations during the past 5350 years. This ~500-year cyclic climate change occurred in EA during the mid-late Holocene and even the last 150 years dominated by anthropogenic forcing. It was almost in phase with a ~500-year periodic change in solar activity and Greenland temperature change, suggesting that ~500-year small variations in solar output played a prominent role in the mid-late Holocene climate dynamics in EA, linked to high latitude climate system. Its last warm phase might terminate in the next several decades to enter another ~250-year cool phase, and thus this future centennial cyclic temperature minimum could partially slow down man-made global warming. PMID:24402348

The centennial of the Yellow Fever Commission and the use of informed consent in medical research

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Güereña-Burgueño Fernando

2002-01-01

Full Text Available The year 2000 marked the centennial of the discovery of the mode of transmission of yellow fever. Informed consent was systematically used for the first time in research. This process was the result of a complex social phenomenon involving the American Public Health Association, the US and Spanish Governments, American and Cuban scientists, the media, and civilian and military volunteers. The public health and medical communities face the AIDS pandemic at the beginning of the 21st Century, as they faced the yellow fever epidemic at the beginning of the 20th Century. Current medical research dilemmas have fueled the debate about the ethical conduct of research in human subjects. The AIDS pandemic is imposing enormous new ethical challenges on the conduct of medical research, especially in the developing world. Reflecting on the yellow fever experiments of 1900, lessons can be learned and applied to the current ethical challenges faced by the international public health research community.

Atlanta Centennial Olympic Games and Paralympic Games event study, 1996. Final report, July 1996--August 1996

Energy Technology Data Exchange (ETDEWEB)

Amodei, R.; Bard, E.; Brong, B.; Cahoon, F.; Jasper, K.

1998-11-01

The Atlanta metropolitan region was the location of one of the most ambitious Intelligent Transportation Systems (ITS) deployments in the United States. This deployment included several individual projects--a Central Transportation Management Center (TMC), six Traffic Control Centers (TCCs), one Transit Information Center (TIC), The Travel Information Showcase (TIS), and the extension of the Metropolitan Atlanta Rapid Transit Authority (MARTA) Rail network and the new high-occupancy vehicle (HOV) lanes on I-85 and I-75. The 1996 Atlanta Centennial Olympic Games and Paralympic Games created a focus for these projects. All of these systems were to be brought on-line in time for the Olympic Games. This report presents the findings of the 1996 Olympic and Paralympic Games Events Study--a compilation of findings of system performance, the benefits realized, and the lessons learned during their operations over the event period. The study assessed the performance of the various Travel Demand Management (TDM) plans employed for Olympic Games traffic management.

Centennial black carbon turnover observed in a Russian steppe soil

Directory of Open Access Journals (Sweden)

K. Hammes

2008-09-01

Full Text Available Black carbon (BC, from incomplete combustion of fuels and biomass, has been considered highly recalcitrant and a substantial sink for carbon dioxide. Recent studies have shown that BC can be degraded in soils. We use two soils with very low spatial variability sampled 100 years apart in a Russian steppe preserve to generate the first whole-profile estimate of BC stocks and turnover in the field. Quantities of fire residues in soil changed significantly over a century. Black carbon stock was 2.5 kg m⁻², or about 7–10% of total organic C in 1900. With cessation of biomass burning, BC stocks decreased 25% over a century, which translates into a centennial soil BC turnover (293 years best estimate; range 182–541 years, much faster than so-called inert or passive carbon in ecosystem models. The turnover time presented here is for loss by all processes, namely decomposition, leaching, and erosion, although the latter two were probably insignificant in this case. Notably, at both time points, the peak BC stock was below 30 cm, a depth interval, which is not typically accounted for. Also, the quality of the fire residues changed with time, as indicated by the use benzene polycarboxylic acids (BPCA as molecular markers. The proportions of less-condensed (and thus more easily degradable BC structures decreased, whereas the highly condensed (and more recalcitrant BC structures survived unchanged over the 100-year period. Our results show that BC cannot be assumed chemically recalcitrant in all soils, and other explanations for very old soil carbon are needed.

The centennial of the Yellow Fever Commission and the use of informed consent in medical research.

Science.gov (United States)

Güereña-Burgueño, Fernando

2002-01-01

The year 2000 marked the centennial of the discovery of the mode of transmission of yellow fever. Informed consent was systematically used for the first time in research. This process was the result of a complex social phenomenon involving the American Public Health Association, the US and Spanish Governments, American and Cuban scientists, the media, and civilian and military volunteers. The public health and medical communities face the AIDS pandemic at the beginning of the 21st Century, as they faced the yellow fever epidemic at the beginning of the 20th Century. Current medical research dilemmas have fueled the debate about the ethical conduct of research in human subjects. The AIDS pandemic is imposing enormous new ethical challenges on the conduct of medical research, especially in the developing world. Reflecting on the yellow fever experiments of 1900, lessons can be learned and applied to the current ethical challenges faced by the international public health research community. The English version of this paper is available too at: http://www.insp.mx/salud/index.html.

The long-range correlation and evolution law of centennial-scale temperatures in Northeast China.

Science.gov (United States)

Zheng, Xiaohui; Lian, Yi; Wang, Qiguang

2018-01-01

This paper applies the detrended fluctuation analysis (DFA) method to investigate the long-range correlation of monthly mean temperatures from three typical measurement stations at Harbin, Changchun, and Shenyang in Northeast China from 1909 to 2014. The results reveal the memory characteristics of the climate system in this region. By comparing the temperatures from different time periods and investigating the variations of its scaling exponents at the three stations during these different time periods, we found that the monthly mean temperature has long-range correlation, which indicates that the temperature in Northeast China has long-term memory and good predictability. The monthly time series of temperatures over the past 106 years also shows good long-range correlation characteristics. These characteristics are also obviously observed in the annual mean temperature time series. Finally, we separated the centennial-length temperature time series into two time periods. These results reveal that the long-range correlations at the Harbin station over these two time periods have large variations, whereas no obvious variations are observed at the other two stations. This indicates that warming affects the regional climate system's predictability differently at different time periods. The research results can provide a quantitative reference point for regional climate predictability assessment and future climate model evaluation.

Holocene climate aridification trend and human impact interrupted by millennial- and centennial-scale climate fluctuations from a new sedimentary record from Padul (Sierra Nevada, southern Iberian Peninsula)

Science.gov (United States)

Ramos-Román, María J.; Jiménez-Moreno, Gonzalo; Camuera, Jon; García-Alix, Antonio; Anderson, R. Scott; Jiménez-Espejo, Francisco J.; Carrión, José S.

2018-01-01

Holocene centennial-scale paleoenvironmental variability has been described in a multiproxy analysis (i.e., lithology, geochemistry, macrofossil, and microfossil analyses) of a paleoecological record from the Padul Basin in Sierra Nevada, southern Iberian Peninsula. This sequence covers a relevant time interval hitherto unreported in the studies of the Padul sedimentary sequence. The ˜ 4700-year record has preserved proxies of climate variability, with vegetation, lake levels, and sedimentological change during the Holocene in one of the most unique and southernmost wetlands in Europe. The progressive middle and late Holocene trend toward arid conditions identified by numerous authors in the western Mediterranean region, mostly related to a decrease in summer insolation, is also documented in this record; here it is also superimposed by centennial-scale variability in humidity. In turn, this record shows centennial-scale climate oscillations in temperature that correlate with well-known climatic events during the late Holocene in the western Mediterranean region, synchronous with variability in solar and atmospheric dynamics. The multiproxy Padul record first shows a transition from a relatively humid middle Holocene in the western Mediterranean region to more aridity from ˜ 4700 to ˜ 2800 cal yr BP. A relatively warm and humid period occurred between ˜ 2600 and ˜ 1600 cal yr BP, coinciding with persistent negative North Atlantic Oscillation (NAO) conditions and the historic Iberian-Roman Humid Period. Enhanced arid conditions, co-occurring with overall positive NAO conditions and increasing solar activity, are observed between ˜ 1550 and ˜ 450 cal yr BP (˜ 400 to ˜ 1400 CE) and colder and warmer conditions occurred during the Dark Ages and Medieval Climate Anomaly (MCA), respectively. Slightly wetter conditions took place during the end of the MCA and the first part of the Little Ice Age, which could be related to a change towards negative NAO conditions

Decadal- to Centennial-Scale Variations in Anchovy Biomass in the Last 250 Years Inferred From Scales Preserved in Laminated Sediments off the Coast of Pisco, Peru

Science.gov (United States)

Salvatteci, R.; Field, D.; Gutierrez, D.; Baumgartner, T.; Ferreira, V.; Velazco, F.; Niquen, M.; Guevara, R.; Sifeddine, A.; Ortlieb, L.

2005-12-01

The highly productive upwelling environment off the coast of Peru sustains one of the world's largest fisheries, the Peruvian anchoveta ( Engraulis ringens), but variability on interannual to decadal timescales results in dramatic variations in catch. We quantified variations in anchovy scale abundance preserved in laminated sediments collected at 300 m depth of the Peruvian margin (near Pisco, central Peru) to infer decadal- to centennial-scale population variability prior to the development of the fishery. High-resolution subsampling of 2.5 - 8.2 mm was done following the laminated structure of the core. A chronology based on downcore excess 210Pb activities and 14C-AMS ages indicate that samples represent an estimated 1-7 years in time. Anchovy scale deposition is correlated with anchovy landings at Pisco, indicating that scale deposition can be used as a proxy of (at least) local biomass. A small, but significant, reduction in anchovy scale width (0.2 mm) after the development of the fishery suggests a small effect of the fishery on anchovy size distributions. While decadal-scale variability in anchovy scale deposition is persistent throughout the record, a dramatic increase in scale flux occurred around 1860 A.D. and persists for approximately a century. Our results indicate that centennial-scale variability composes a large portion of the variability. However, decadal-scale variability associated with the Pacific Decadal Oscillation is not correlated with the inferred biomass variability prior to the development of the fishery. Shifts in the distribution of the population may account for an additional component of the variability in scale deposition.

Placing the Common Era in a Holocene context: millennial to centennial patterns and trends in the hydroclimate of North America over the past 2000 years

Science.gov (United States)

Shuman, Bryan N.; Routson, Cody; McKay, Nicholas; Fritz, Sherilyn; Kaufman, Darrell; Kirby, Matthew E.; Nolan, Connor; Pederson, Gregory T.; St-Jacques, Jeannine-Marie

2018-05-01

A synthesis of 93 hydrologic records from across North and Central America, and adjacent tropical and Arctic islands, reveals centennial to millennial trends in the regional hydroclimates of the Common Era (CE; past 2000 years). The hydrological records derive from materials stored in lakes, bogs, caves, and ice from extant glaciers, which have the continuity through time to preserve low-frequency ( > 100 year) climate signals that may extend deeper into the Holocene. The most common pattern, represented in 46 (49 %) of the records, indicates that the centuries before 1000 CE were drier than the centuries since that time. Principal component analysis indicates that millennial-scale trends represent the dominant pattern of variance in the southwestern US, northeastern US, mid-continent, Pacific Northwest, Arctic, and tropics, although not all records within a region show the same direction of change. The Pacific Northwest and the southernmost tier of the tropical sites tended to dry toward present, as many other areas became wetter than before. In 22 records (24 %), the Medieval Climate Anomaly period (800-1300 CE) was drier than the Little Ice Age (1400-1900 CE), but in many cases the difference was part of the longer millennial-scale trend, and, in 25 records (27 %), the Medieval Climate Anomaly period represented a pluvial (wet) phase. Where quantitative records permitted a comparison, we found that centennial-scale fluctuations over the Common Era represented changes of 3-7 % in the modern interannual range of variability in precipitation, but the accumulation of these long-term trends over the entirety of the Holocene caused recent centuries to be significantly wetter, on average, than most of the past 11 000 years.

Cirque Glacier on South Georgia Shows Centennial Variability over the Last 7000 Years

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Lea T. Oppedal

2018-02-01

Full Text Available A 7000 year-long cirque glacier reconstruction from South Georgia, based on detailed analysis of fine-grained sediments deposited downstream in a bog and a lake, suggests continued presence during most of the Holocene. Glacier activity is inferred from various sedimentary properties including magnetic susceptibility (MS, dry bulk density (DBD, loss-on-ignition (LOI and geochemical elements (XRF, and tallied to a set of terminal moraines. The two independently dated sediment records document concurring events of enhanced glacigenic sediment influx to the bog and lake, whereas the upstream moraines afford the opportunity to calculate past Equilibrium Line Altitudes (ELA which has varied in the order of 70 m altitude. Combined, the records provide new evidence of cirque glacier fluctuations on South Georgia. Based on the onset of peat formation, the study site was deglaciated prior to 9900 ± 250 years ago when Neumayer tidewater glacier retreated up-fjord. Changes in the lake and bog sediment properties indicate that the cirque glacier was close to its maximum Holocene extent between 7200 ± 400 and 4800 ± 200 cal BP, 2700 ± 150 and 2000 ± 200 cal BP, 500 ± 150–300 ± 100 cal BP, and in the Twentieth century (likely 1930s. The glacier fluctuations are largely in-phase with reconstructed Patagonian glaciers, implying that they respond to centennial climate variability possibly connected to corresponding modulations of the Southern Westerly Winds.

Cirque glacier on South Georgia shows centennial variability over the last 7000 years

Science.gov (United States)

Oppedal, Lea T.; Bakke, Jostein; Paasche, Øyvind; Werner, Johannes P.; van der Bilt, Willem G. M.

2018-02-01

A 7000 year-long cirque glacier reconstruction from South Georgia, based on detailed analysis of fine-grained sediments deposited downstream in a bog and a lake, suggests continued presence during most of the Holocene. Glacier activity is inferred from various sedimentary properties including magnetic susceptibility (MS), dry bulk density (DBD), loss-on-ignition (LOI) and geochemical elements (XRF), and tallied to a set of terminal moraines. The two independently dated sediment records document concurring events of enhanced glacigenic sediment influx to the bog and lake, whereas the upstream moraines afford the opportunity to calculate past Equilibrium Line Altitudes (ELA) which has varied in the order of 70 m altitude. Combined, the records provide new evidence of cirque glacier fluctuations on South Georgia. Based on the onset of peat formation, the study site was deglaciated prior to 9900±250 years ago when Neumayer tidewater glacier retreated up-fjord. Changes in the lake and bog sediment properties indicate that the cirque glacier was close to its maximum Holocene extent between 7200±400 and 4800±200 cal BP, 2700±150 and 2000±200 cal BP, 500±150-300±100 cal BP, and in the 20th century (likely 1930s). The glacier fluctuations are largely in-phase with reconstructed Patagonian glaciers, implying that they respond to centennial climate variability possibly connected to corresponding modulations of the Southern Westerly Winds.

Multi-centennial upper-ocean heat content reconstruction using online data assimilation

Science.gov (United States)

Perkins, W. A.; Hakim, G. J.

2017-12-01

The Last Millennium Reanalysis (LMR) provides an advanced paleoclimate ensemble data assimilation framework for multi-variate climate field reconstructions over the Common Era. Although reconstructions in this framework with full Earth system models remain prohibitively expensive, recent work has shown improved ensemble reconstruction validation using computationally inexpensive linear inverse models (LIMs). Here we leverage these techniques in pursuit of a new multi-centennial field reconstruction of upper-ocean heat content (OHC), synthesizing model dynamics with observational constraints from proxy records. OHC is an important indicator of internal climate variability and responds to planetary energy imbalances. Therefore, a consistent extension of the OHC record in time will help inform aspects of low-frequency climate variability. We use the Community Climate System Model version 4 (CCSM4) and Max Planck Institute (MPI) last millennium simulations to derive the LIMs, and the PAGES2K v.2.0 proxy database to perform annually resolved reconstructions of upper-OHC, surface air temperature, and wind stress over the last 500 years. Annual OHC reconstructions and uncertainties for both the global mean and regional basins are compared against observational and reanalysis data. We then investigate differences in dynamical behavior at decadal and longer time scales between the reconstruction and simulations in the last-millennium Coupled Model Intercomparison Project version 5 (CMIP5). Preliminary investigation of 1-year forecast skill for an OHC-only LIM shows largely positive spatial grid point local anomaly correlations (LAC) with a global average LAC of 0.37. Compared to 1-year OHC persistence forecast LAC (global average LAC of 0.30), the LIM outperforms the persistence forecasts in the tropical Indo-Pacific region, the equatorial Atlantic, and in certain regions near the Antarctic Circumpolar Current. In other regions, the forecast correlations are less than the

The Development of Genetics in the Light of Thomas Kuhn's Theory of Scientific Revolutions.

Science.gov (United States)

Portin, Petter

2015-01-01

The concept of a paradigm is in the key position in Thomas Kuhn's theory of scientific revolutions. A paradigm is the framework within which the results, concepts, hypotheses and theories of scientific research work are understood. According to Kuhn, a paradigm guides the working and efforts of scientists during the time period which he calls the period of normal science. Before long, however, normal science leads to unexplained matters, a situation that then leads the development of the scientific discipline in question to a paradigm shift--a scientific revolution. When a new theory is born, it has either gradually emerged as an extension of the past theory, or the old theory has become a borderline case in the new theory. In the former case, one can speak of a paradigm extension. According to the present author, the development of modern genetics has, until very recent years, been guided by a single paradigm, the Mendelian paradigm which Gregor Mendel launched 150 years ago, and under the guidance of this paradigm the development of genetics has proceeded in a normal fashion in the spirit of logical positivism. Modern discoveries in genetics have, however, created a situation which seems to be leading toward a paradigm shift. The most significant of these discoveries are the findings of adaptive mutations, the phenomenon of transgenerational epigenetic inheritance, and, above all, the present deeply critical state of the concept of the gene.

EL ORIGEN DE LAS ESPECIES Y SU RELACION CON EL INICIO DE LA ACTUAL TEORIA DE LA HERENCIA.

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William Usanquén

2009-10-01

Full Text Available En los 200 años del nacimiento de Charles Darwin se ha realizado un sinfín de discusiones y se han publicado cientos de artículos por todo el mundo haciendo referencia a los aportes de “El origen de las especies” en las diferentes ramas de la cultura occidental, Sin embargo, haciendo un mayor énfasis en las obras, como producto madurado de la mente humana, en este año más que ser el aniversario número doscientos del nacimiento de Darwin, es el 200 aniversario de la aparición de una obra fundamental dentro de la teoría biológica: La “Philosophie Zoologique” escrita por Jean-Baptiste Lamarck. Por otra parte, también celebramos los 150 años de la primera edicion de “The Origin of species by means of natural selection, or the preservation of favoured races in the struggle for life”. En la primera parte se mostraran algunos elementos históricos relacionados con la filosofía zoológica y el contexto político de su nacimiento. Posteriormente se revisaran los principales conceptos darwinianos relacionados con la herencia y sus consecuencias en la formación de la disciplina llamada genética, se estudiara el caso especial de Gregor Mendel y finalmente se mostraran las implicaciones actuales en nuestra interpretación de la teoría evolutiva.

Global impact of induced mutation in plant breeding

International Nuclear Information System (INIS)

Bhatia, R.

2001-01-01

Sudden, heritable changes in the genetic material, DNA, are known as mutations. Selection of naturally occurring mutations in wild, ancestral species helped humans in the domestication and further improvement of today's crop plants. Although Charles Darwin was unaware in 1859 of variation and mutations in living organisms, his theory of evolution by natural selection assumed variability. Much later, it was established that mutations are the source of biodiversity, and the driving force for evolution. Gregor Mendel in 1865 also used several mutants in his experiments with garden pea to formulate the laws of inheritance. The term mutation itself was used for the first time by Hugo de Vries in 1901 in his mutation theory. Plant breeding based on the science of genetics, as practiced over the past 100 years, exploited the available genetic variability in the primary gene pool of crop plants, and sometimes in related species. This approach enlarged the yield potential of crops several fold. It also a) improved the stability of yield by incorporating resistance to various biotic and abiotic stresses; b) improved quality of the produce; and c) altered the adaptability of crop species, providing opportunities to grow new crops for food security outside their traditional range. Genetically improved seed (or other planting material) is the most significant input for developing sustainable cropping systems for food security and economic growth. Half of the increased productivity of today's crop plants comes from genetic improvements. The other half is contributed by inputs and management practices

FORSTERIAN MODEL OF CHARACTERIZATION AND NON-HUMAN CHARACTERS IN NARRATIVE FICTION: IRIS MURDOCH’S MISTER MARS AND FRANZ KAFKA’S GREGOR SAMSA

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Barış METE

2017-06-01

Full Text Available In Aspects of the Novel, Edward Morgan Forster introduces the critical concepts of flat and round to describe the nature of different types of fictional characters. According to Forster’s theoretical categorization, flat characters are constructed and exist in their fictional realm around a single feature or quality. As this is the key criterion, Forster argues that flat characters can easily be recognized and remembered by the reader. Flat characters remain mostly the same through circumstances. In other words, flat characters never surprise the reader. Contrary to the nature of flat characters, round characters operate in an opposite direction to their counterparts. Round characters never remain the same throughout events, and it is not easy to recognize them since they do not exist under the dominance of a single trait. In addition to these, round characters are those who surprise the reader. Although Forster’s categorisation of fictional characters has functioned well in most of the cases, some characters are not easily analysed under this formula. Franz Kafka’s Gregor Samsa, for example, seems neither a round nor a flat character. Throughout his story, he remains the same. At the same time, he surprises the reader, which is not expected from him since he is mostly the same character in the text. Samsa’s turning into an insect further complicates the definition of his roundness or flatness. Another example is Iris Murdoch’s Mister Mars. Mister Mars is an animal. But at the same time he is a movie star, a celebrity. He has a pivotal role for the protagonist of the text. Therefore, the aim of this study is first to introduce the theoretical background of the nature of fictional characters and then to display some difficulties present particularly in Forster’s classification through the characterisation of two non-human examples.

Holocene climate aridification trend and human impact interrupted by millennial- and centennial-scale climate fluctuations from a new sedimentary record from Padul (Sierra Nevada, southern Iberian Peninsula

Directory of Open Access Journals (Sweden)

M. J. Ramos-Román

2018-01-01

Full Text Available Holocene centennial-scale paleoenvironmental variability has been described in a multiproxy analysis (i.e., lithology, geochemistry, macrofossil, and microfossil analyses of a paleoecological record from the Padul Basin in Sierra Nevada, southern Iberian Peninsula. This sequence covers a relevant time interval hitherto unreported in the studies of the Padul sedimentary sequence. The  ∼  4700-year record has preserved proxies of climate variability, with vegetation, lake levels, and sedimentological change during the Holocene in one of the most unique and southernmost wetlands in Europe. The progressive middle and late Holocene trend toward arid conditions identified by numerous authors in the western Mediterranean region, mostly related to a decrease in summer insolation, is also documented in this record; here it is also superimposed by centennial-scale variability in humidity. In turn, this record shows centennial-scale climate oscillations in temperature that correlate with well-known climatic events during the late Holocene in the western Mediterranean region, synchronous with variability in solar and atmospheric dynamics. The multiproxy Padul record first shows a transition from a relatively humid middle Holocene in the western Mediterranean region to more aridity from  ∼  4700 to  ∼  2800 cal yr BP. A relatively warm and humid period occurred between  ∼  2600 and  ∼  1600 cal yr BP, coinciding with persistent negative North Atlantic Oscillation (NAO conditions and the historic Iberian–Roman Humid Period. Enhanced arid conditions, co-occurring with overall positive NAO conditions and increasing solar activity, are observed between  ∼  1550 and  ∼  450 cal yr BP (∼  400 to  ∼  1400 CE and colder and warmer conditions occurred during the Dark Ages and Medieval Climate Anomaly (MCA, respectively. Slightly wetter conditions took place during the end of

Holocene millennial/centennial-scale multiproxy cyclicity in temperate eastern Australian estuary sediments

Science.gov (United States)

Skilbeck, C. Gregory; Rolph, Timothy C.; Hill, Natalie; Woods, Jonathan; Wilkens, Roy H.

2005-05-01

We have undertaken a comparative study of down-core variation in multiproxy palaeoclimate data (magnetic susceptibility, calcium carbonate content and total organic carbon) from two coastal water bodies (Myall and Tuggerah Lakes) in temperate eastern Australia to identify local, regional and global-forcing factors within Holocene estuarine sediments. The two lakes lie within the same temperate climate zone adjacent to the Tasman Sea, but are not part of the same catchment and drain different geological provinces. One is essentially a freshwater coastal lake whereas the other is a brackish back-barrier lagoon. Despite these differences, data from two sites in each of the two lakes have allowed us to investigate and compare cyclicity in otherwise uniform, single facies sediments within the frequency range of 200-2000 years, limited by the sedimentation rate within the lakes and our sample requirements. We have auto- and cross-correlated strong periodicities at 360 years, 500-530 years, 270-290 years, 420-450 years and 210 years, and subordinate periods of 650 years, 1200-1400 years and 1800 years. Our thesis is that climate is the only regionally available mechanism available to control common millennial and centennial scale cyclicity in these sediments, given the geographical and other differences. However, regional climate may not be the dominant effect at any single time and either location. Within the range of frequency spectral peaks we have identified, several fall within known long-term periodical fluctuations of sun spot activity; however, feedback loops associated with short-term orbital variation, such as Dansgaard-Oeschger cycles, and the relationship between these and palaeo-ENSO variation, are also possible contributors. Copyright

Placing the Common Era in a Holocene context: Millennial to centennial patterns and trends in the hydroclimate of North America over the past 2000 years

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Shuman, Bryan; Routson, Cody C.; McKay, Nicholas P.; Fritz, Sherilyn; Kaufman, Darrell S.; Kirby, Matthew; Nolan, Connor; Pederson, Gregory T.; St. Jacques, Jeannine-Marie

2018-01-01

A synthesis of 93 hydrologic records from across North and Central America, and adjacent tropical and Arctic islands, reveals centennial to millennial trends in the regional hydroclimates of the Common Era (CE; past 2000 years). The hydrological records derive from materials stored in lakes, bogs, caves, and ice from extant glaciers, which have the continuity through time to preserve low-frequency ( > 100 year) climate signals that may extend deeper into the Holocene. The most common pattern, represented in 46 (49 %) of the records, indicates that the centuries before 1000 CE were drier than the centuries since that time. Principal component analysis indicates that millennial-scale trends represent the dominant pattern of variance in the southwestern US, northeastern US, mid-continent, Pacific Northwest, Arctic, and tropics, although not all records within a region show the same direction of change. The Pacific Northwest and the southernmost tier of the tropical sites tended to dry toward present, as many other areas became wetter than before. In 22 records (24 %), the Medieval Climate Anomaly period (800–1300 CE) was drier than the Little Ice Age (1400–1900 CE), but in many cases the difference was part of the longer millennial-scale trend, and, in 25 records (27 %), the Medieval Climate Anomaly period represented a pluvial (wet) phase. Where quantitative records permitted a comparison, we found that centennial-scale fluctuations over the Common Era represented changes of 3–7 % in the modern interannual range of variability in precipitation, but the accumulation of these long-term trends over the entirety of the Holocene caused recent centuries to be significantly wetter, on average, than most of the past 11 000 years.

Centennial-scale variations in diatom productivity off Peru over the last 3000 years

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Fleury, Sophie; Crosta, Xavier; Schneider, Ralph; Blanz, Thomas; Ther, Olivier; Martinez, Philippe; Kim, Jung-Hyun

2016-04-01

The Peruvian coastal upwelling is one of the most productive systems in the global ocean, with important impacts on the carbon cycle. Primary productivity there displays strong variations at the inter-annual to decadal timescales. However, down-core investigations rarely reach sufficient temporal resolution to assess the response of productivity to climatic variations at these timescales beyond the instrumental and historical periods. We here analyzed diatom assemblages, sea-surface temperatures, nitrogen and organic carbon contents on a laminated sediment core from the Peruvian continental shelf to trace variations in regional productivity over the last 3000 years. Our record provides evidence for different climatic and oceanic conditions with more humid and less productive conditions older than 2500 Cal years BP and drier and more productive conditions younger than 2500 Cal years BP. The last 2500 years also present much stronger centennial-scale variability with the occurrence of six intervals with higher total diatom abundances and stronger percentages in upwelling-related diatom species, representative of intensified productivity, congruent to lower percentages in benthic diatoms, indicative of reduced rainfall. These six periods were synchronous to intervals of enhanced Walker circulation, suggesting a strong imprint of the Pacific zonal circulation on productivity variations off Peru. Our record also demonstrates that SSTs did not vary in phase with productivity, arguing against the idea of regional SSTs controlled by the upwelling intensity, but were rather in agreement to SST records off southern Chile, suggesting that Peruvian SSTs variations were largely controlled by oceanic currents at southern high latitudes.

Características dos cachos e bagas de uvas ‘Centennial Seedless’ tratadas com thidiazuron e ácido giberélico / Characteristics of clusters and berries of ‘Centennial Seedless’ table grapes treated with thidiazuron and giberellic acid

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Willian Rodrigues Macedo

2010-12-01

Full Text Available Com o objetivo de avaliar os efeitos das doses de ácido giberélico (AG3 e do thidiazuron (TDZ nas características dos cachos e bagas da uva ‘Centennial Seedless’, um experimento foi realizado em um vinhedo comercial em São Miguel Arcanjo (SP. Os tratamentos consistiram de AG3 nas doses de 0 e 5 mg L-1 associados às doses de 0, 2, 4, 6, 8 e 10 mg L-1 de TDZ, sendo estes reguladores vegetais aplicados aos 15 dias após o pleno florescimento, via pulverização direta nos cachos. Foram avaliadas as variáveis diâmetro do pedicelo, índice de esbagoamento, massa, comprimento e largura dos cachos, bagas e engaços; teores de sólidos solúveis, pH, acidez titulável e relação SS/AT do mosto. A dose de 8 mg L-1 de TDZ associada a 5 mg L-1 de AG3, resultou em maiores médias de massa, comprimento e largura dos cachos, sendo que esta interação não alterou o pH, a relação SS/AT e o índice de esbagoamento dos cachos. O TDZ promoveu aumentos lineares sobre a massa e largura das bagas e reduziu os teores de sólidos solúveis, sendo que do ponto de vista agronômico a dose de 8 mg L-1, apresentou-se mais promissora para uso comercial.Abstract With the objective of evaluating the effects of gibberellic acid (GA3 and thidiazuron (TDZ on the physicochemical characteristics of ‘Centennial Seedless’ table grapes a trial was carried out in a commercial vineyard located in São Miguel Arcanjo (SP, Brazil. The treatments consisted of GA3 on the doses at 0 and 5 mg L-1 associated to 0, 2, 4, 6, 8 and 10 mg L-1 of thidiazuron, applied 15 days after full bloom, sprayed directly to the clusters. The following variables were evaluated: pedicel diameter, drop index, weight, length and width of clusters, berries and rachis; soluble solutes content, pH, titratable acidity and ratio SS/TA of the juice. The dose at 8 mg L-1 of TDZ associated to 5 mg L-1 of AG3 resulted in the highest means of cluster weight, length and width, this interaction did not

Hashimoto's Thyroiditis: Celebrating the Centennial Through the Lens of the Johns Hopkins Hospital Surgical Pathology Records

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De Remigis, Alessandra; Chuang, Kelly; Dembele, Marieme; Iwama, Akiko; Iwama, Shintaro

2013-01-01

Hashimoto's thyroiditis is now considered the most prevalent autoimmune disease, as well as the most common endocrine disorder. It was initially described in 1912, but only rarely reported until the early 1950s. To celebrate this centennial, we reviewed the surgical pathology archives of the Johns Hopkins hospital for cases of Hashimoto's thyroiditis, spanning the period from May 1889 to October 2012. Approximately 15,000 thyroidectomies were performed at this hospital over 124 years. The first surgical case was reported in 1942, 30 years after the original description. Then, 867 cases of Hashimoto's thyroiditis were seen from 1942 to 2012, representing 6% of all thyroidectomies. Hashimoto's thyroiditis was the sole pathological finding in 462 cases; it accompanied other thyroid pathologies in the remaining 405 cases. The most commonly associated pathology was papillary thyroid cancer, an association that increased significantly during the last two decades. The most common indication for thyroidectomy was a thyroid nodule that was cytologically suspicious for malignancy. Hashimoto's thyroiditis remains a widespread, intriguing, and multifaceted disease of unknown etiology one century after its description. Advances in the understanding of its pathogenesis and preoperative diagnosis will improve recognition and treatment of this disorder, and may one day lead to its prevention. PMID:23151083

Centennial-Scale Relationship Between the Southern Hemisphere Westerly Winds and Temperature

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Hodgson, D. A.; Perren, B.; Roberts, S. J.; Sime, L. C.; Verleyen, E.; Van Nieuwenhuyze, W.; Vyverman, W.

2017-12-01

Recent changes in the intensity and position of the Southern Hemisphere Westerly Winds (SHW) have been implicated in a number of important physical changes in the Southern High Latitudes. These include changes in the efficiency of the Southern Ocean CO2 sink through alterations in ocean circulation, the loss of Antarctic ice shelves through enhanced basal melting, changes in Antarctic sea ice extent, and warming of the Antarctic Peninsula. Many of these changes have far-reaching implications for global climate and sea level rise. Despite the importance of the SHW in global climate, our current understanding of the past and future behaviour of the westerly winds is limited by relatively few reconstructions and measurements of the SHW in their core belt over the Antarctic Circumpolar Current; the region most relevant to Southern Ocean air-sea gas exchange. The aim of this study was to reconstruct changes in the relative strength of the SHW at Marion Island, one of a small number of sub-Antarctic islands that lie in the core of the SHWs. We applied independent diatom- and geochemistry- based methods to track past changes in relative wind intensity. This mutiproxy approach provides a validation that the proxies are responding to the external forcing (the SHW) rather than local (e.g. precipitation ) or internal dynamics. Results show that that the strength of the SHW are intrinsically linked to extratropical temperatures over centennial timescales, with warmer temperatures driving stronger winds. Our findings also suggest that large variations in the path and intensity of the westerly winds are driven by relatively small variations in temperature over these timescales. This means that with continued climate warming, even in the absence of anthropogenic ozone-depletion, we should anticipate large shifts in the SHW, causing stronger, more poleward-intensified winds in the decades and centuries to come, with attendant impacts on ocean circulation, ice shelf stability, and

Early land use and centennial scale changes in lake-water organic carbon prior to contemporary monitoring.

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Meyer-Jacob, Carsten; Tolu, Julie; Bigler, Christian; Yang, Handong; Bindler, Richard

2015-05-26

Organic carbon concentrations have increased in surface waters across parts of Europe and North America during the past decades, but the main drivers causing this phenomenon are still debated. A lack of observations beyond the last few decades inhibits a better mechanistic understanding of this process and thus a reliable prediction of future changes. Here we present past lake-water organic carbon trends inferred from sediment records across central Sweden that allow us to assess the observed increase on a centennial to millennial time scale. Our data show the recent increase in lake-water carbon but also that this increase was preceded by a landscape-wide, long-term decrease beginning already A.D. 1450-1600. Geochemical and biological proxies reveal that these dynamics coincided with an intensification of human catchment disturbance that decreased over the past century. Catchment disturbance was driven by the expansion and later cessation of widespread summer forest grazing and farming across central Scandinavia. Our findings demonstrate that early land use strongly affected past organic carbon dynamics and suggest that the influence of historical landscape utilization on contemporary changes in lake-water carbon levels has thus far been underestimated. We propose that past changes in land use are also a strong contributing factor in ongoing organic carbon trends in other regions that underwent similar comprehensive changes due to early cultivation and grazing over centuries to millennia.

Journal of Biosciences | Indian Academy of Sciences

Indian Academy of Sciences (India)

Home; Journals; Journal of Biosciences. Gregor Durstewitz. Articles written in Journal of Biosciences. Volume 37 Issue 5 November 2012 pp 821-828 Articles. Large SNP arrays for genotyping in crop plants · Martin W Ganal Andreas Polley Eva-Maria Graner Joerg Plieske Ralf Wieseke Hartmut Luerssen Gregor Durstewitz.

TRANSFORMATION

Energy Technology Data Exchange (ETDEWEB)

LACKS,S.A.

2003-10-09

Transformation, which alters the genetic makeup of an individual, is a concept that intrigues the human imagination. In Streptococcus pneumoniae such transformation was first demonstrated. Perhaps our fascination with genetics derived from our ancestors observing their own progeny, with its retention and assortment of parental traits, but such interest must have been accelerated after the dawn of agriculture. It was in pea plants that Gregor Mendel in the late 1800s examined inherited traits and found them to be determined by physical elements, or genes, passed from parents to progeny. In our day, the material basis of these genetic determinants was revealed to be DNA by the lowly bacteria, in particular, the pneumococcus. For this species, transformation by free DNA is a sexual process that enables cells to sport new combinations of genes and traits. Genetic transformation of the type found in S. pneumoniae occurs naturally in many species of bacteria (70), but, initially only a few other transformable species were found, namely, Haemophilus influenzae, Neisseria meningitides, Neisseria gonorrheae, and Bacillus subtilis (96). Natural transformation, which requires a set of genes evolved for the purpose, contrasts with artificial transformation, which is accomplished by shocking cells either electrically, as in electroporation, or by ionic and temperature shifts. Although such artificial treatments can introduce very small amounts of DNA into virtually any type of cell, the amounts introduced by natural transformation are a million-fold greater, and S. pneumoniae can take up as much as 10% of its cellular DNA content (40).

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Indian Academy of Sciences (India)

Prakash

as Bateson, Pearson and deVries saw conflicts between Mendel and Darwin, between ... for the human race, the results of Mendel, and Francis Galton's emphasis on ..... He had been elected to the U S National Academy of Sciences in .... P 2008 Three-qubit operators, the split Cayley hexagon of order two and black holes;.

ASAS centennial paper: Landmark discoveries in swine nutrition in the past century.

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Cromwell, G L

2009-02-01

During this centennial year of the American Society of Animal Science (ASAS), it is of interest to look back over the history of our Society and, in particular, to the many contributions made by researchers in the area of swine nutrition. A great number of basic and applied research studies involving the nutrition of weanling, growing, and finishing pigs, and gestating and lactating sows have been conducted by swine nutritionists during the past 100 yr. Most of these studies were conducted at universities by animal scientists or by the graduate students under their leadership. Others were conducted by nutritionists in the feed and pharmaceutical industries and government scientists at ARS/USDA research centers. Contributions were also made by animal scientists beyond our borders. Much of the research was published in the Journal of Animal Science during its 66 yr of existence. Before the first issue of the journal was published in 1942, some of the earlier studies were reported in the Proceedings of the Annual Meeting of the Society of Animal Production, the forerunner of ASAS. These research studies have progressively led to a better understanding of the role and utilization of dietary energy, protein, AA, carbohydrates, fats, minerals, and vitamins by pigs and have helped to quantify the nutrient requirements of pigs for various stages of growth, for sows during gestation and lactation, and to a limited extent, for boars. Determining the nutritional value of a wide array of feedstuffs, evaluating feeding strategies, and assessing the value of growth-promoting and carcass-enhancing agents have been important research contributions as well. To identify the particular studies that were among the most instrumental in contributing to our present knowledge of swine nutrition is, to say the least, a daunting assignment. To aid in this task, a survey of swine nutritionists was conducted in which they were asked to identify and rank the 10 most significant findings in

Sea-level response to melting of Antarctic ice shelves on multi-centennial timescales with the fast Elementary Thermomechanical Ice Sheet model (f.ETISh v1.0

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F. Pattyn

2017-08-01

Full Text Available The magnitude of the Antarctic ice sheet's contribution to global sea-level rise is dominated by the potential of its marine sectors to become unstable and collapse as a response to ocean (and atmospheric forcing. This paper presents Antarctic sea-level response to sudden atmospheric and oceanic forcings on multi-centennial timescales with the newly developed fast Elementary Thermomechanical Ice Sheet (f.ETISh model. The f.ETISh model is a vertically integrated hybrid ice sheet–ice shelf model with vertically integrated thermomechanical coupling, making the model two-dimensional. Its marine boundary is represented by two different flux conditions, coherent with power-law basal sliding and Coulomb basal friction. The model has been compared to existing benchmarks. Modelled Antarctic ice sheet response to forcing is dominated by sub-ice shelf melt and the sensitivity is highly dependent on basal conditions at the grounding line. Coulomb friction in the grounding-line transition zone leads to significantly higher mass loss in both West and East Antarctica on centennial timescales, leading to 1.5 m sea-level rise after 500 years for a limited melt scenario of 10 m a−1 under freely floating ice shelves, up to 6 m for a 50 m a−1 scenario. The higher sensitivity is attributed to higher ice fluxes at the grounding line due to vanishing effective pressure. Removing the ice shelves altogether results in a disintegration of the West Antarctic ice sheet and (partially marine basins in East Antarctica. After 500 years, this leads to a 5 m and a 16 m sea-level rise for the power-law basal sliding and Coulomb friction conditions at the grounding line, respectively. The latter value agrees with simulations by DeConto and Pollard (2016 over a similar period (but with different forcing and including processes of hydrofracturing and cliff failure. The chosen parametrizations make model results largely independent of spatial resolution so

Sea-level response to melting of Antarctic ice shelves on multi-centennial timescales with the fast Elementary Thermomechanical Ice Sheet model (f.ETISh v1.0)

Science.gov (United States)

Pattyn, Frank

2017-08-01

The magnitude of the Antarctic ice sheet's contribution to global sea-level rise is dominated by the potential of its marine sectors to become unstable and collapse as a response to ocean (and atmospheric) forcing. This paper presents Antarctic sea-level response to sudden atmospheric and oceanic forcings on multi-centennial timescales with the newly developed fast Elementary Thermomechanical Ice Sheet (f.ETISh) model. The f.ETISh model is a vertically integrated hybrid ice sheet-ice shelf model with vertically integrated thermomechanical coupling, making the model two-dimensional. Its marine boundary is represented by two different flux conditions, coherent with power-law basal sliding and Coulomb basal friction. The model has been compared to existing benchmarks. Modelled Antarctic ice sheet response to forcing is dominated by sub-ice shelf melt and the sensitivity is highly dependent on basal conditions at the grounding line. Coulomb friction in the grounding-line transition zone leads to significantly higher mass loss in both West and East Antarctica on centennial timescales, leading to 1.5 m sea-level rise after 500 years for a limited melt scenario of 10 m a-1 under freely floating ice shelves, up to 6 m for a 50 m a-1 scenario. The higher sensitivity is attributed to higher ice fluxes at the grounding line due to vanishing effective pressure. Removing the ice shelves altogether results in a disintegration of the West Antarctic ice sheet and (partially) marine basins in East Antarctica. After 500 years, this leads to a 5 m and a 16 m sea-level rise for the power-law basal sliding and Coulomb friction conditions at the grounding line, respectively. The latter value agrees with simulations by DeConto and Pollard (2016) over a similar period (but with different forcing and including processes of hydrofracturing and cliff failure). The chosen parametrizations make model results largely independent of spatial resolution so that f.ETISh can potentially be

Editors' note

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Denker, Carsten; Feller, Alex; Schmidt, Wolfgang; von der Lühe, Oskar

2012-11-01

This topical issue of Astronomische Nachrichten/Astronomical Notes is a collection of reference articles covering the GREGOR solar telescope, its science capabilities, its subsystems, and its dedicated suite of instruments for high-resolution observations of the Sun. Because ground-based telescopes have life spans of several decades, it is only natural that they continuously reinvent themselves. Literally, the GREGOR telescope builds on the foundations of the venerable Gregory-Coudé Telescope (GCT) at Observatorio del Teide, Tenerife, Spain. Acknowledging the fact that new discoveries in observational solar physics are driven by larger apertures to collect more photons and to scrutinize the Sun in finer detail, the GCT was decommissioned and the building was made available to the GREGOR project.

Life Table Parameters and Consumption Rate of Cydnodromus picanus Ragusa, Amblyseius graminis Chant, and Galendromus occidentalis (Nesbitt on Avocado Red Mite Oligonychus yothersi (McGregor (Acari: Phytoseiidae, Tetranychidae Parámetros de Tabla de Vida y Tasa de Consumo de Cydnodromus picanus Ragusa, Amblyseius graminis Chant y Galendromus occidentalis (Nesbitt, sobre la Arañita Roja del Palto Oligonychus yothersi (McGregor (Acari: Phytoseiidae, Tetranychidae

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Tommy Rioja S

2009-06-01

Full Text Available The avocado red mite Oligonychus yothersi (McGregor is the major leaf pest in Chile’s avocado orchards. Itaffects leaf physiology and makes it necessary to seek new natural enemies to interact with low population densities of O. yothersi. The potentiality of three predator mites: Cydnodromus picanus Ragusa, Amblyseius graminis Chant, and Galendromus occidentalis (Nesbitt was evaluated under laboratory conditions (27 ± 1.93ºC, 87 ± 3.61% H.R. and 16:8 (L:D photoperiod on avocado leaf disks Persea americana Mill. var. Hass (Ø = 5 cm by separately feeding eggs, immature, and adult females of O. yothersi, and registering postembryonic development, consumption, as well as life table parameters. The postembryonic development of C. picanus was significantly lower (5.46 days compared to both A. graminis (7.33 days and G. occidentalis (8.69 days which were fed with immature O. yothersi. The life table parameters of C. picanus were net reproductive rate R0 = 25.41, finite rate of increase λ = 1.29, and Mean Generation Time T = 12.46. The Net Intrinsic Rate of Increase (r m was significantly higher for C. picanus (r m = 0.25 in contrast with G. occidentalis (r m = 0.19, while A. graminis showed r m = -0.06 indicating that its population didn’t have descendants. Under laboratory conditions, r m registered by C. picanus is an indicator of its predatory potential to control O. Yothersi. It can be assumed that the pest population reduction pattern could be maintained under field conditions.En Chile la arañita roja del palto Oligonychus yothersi (McGregor es la plaga más importante a nivel foliar en huertos comerciales afectando la fisiología de la hoja, siendo necesario la búsqueda de nuevos enemigos naturales que interactúen a bajas densidades poblacionales de O. yothersi. Se evaluó en condiciones de laboratorio (27±1,93ºC, 87±3,61 % H.R. y un fotoperíodo de 16:8 (L:O sobre discos de hojas de palto Persea americana Mill. var. Hass (Ø = 5

Eine neue Lyrikanthologie / Marianne Vogel

Index Scriptorium Estoniae

Vogel, Marianne

2000-01-01

Arvustus: Die Freiheit der Kartoffelkeime : Poesie aus Estland : Jaan Kaplinski, Doris Kareva, Hasso Krull, Viivi Luik, Ene Mihkelson, Paul-Eerik Rummo / hrsg. Gregor Laschen ; Nachdichtungen von Marcel Beyer, Friedrich Christian Delius, Katja Lange-Müller, Gregor Laschen, Johann P. Tammen, Ralf Thenior. Bremerhaven : Wirtschaftsverlag NW Verlag für neue Wissenschaft GmbH, 1999. (edition die horen ; 24).

Acute posttraumatic stress symptoms and depression after exposure to the 2005 Saskatchewan Centennial Air Show disaster: prevalence and predictors.

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Taylor, Steven; Asmundson, Gordon J G; Carleton, R Nicholas; Brundin, Peter

2007-01-01

The purpose of this study was to determine the prevalence of acute distress-that is, clinically significant posttraumatic stress symptoms (PTSS) and depression-and to identify predictors of each in a sample of people who witnessed a fatal aircraft collision at the 2005 Saskatchewan Centennial Air Show. Air Show attendees (N = 157) were recruited by advertisements in the local media and completed an Internet-administered battery of questionnaires. Based on previously established cut-offs, 22 percent respondents had clinically significant PTSS and 24 percent had clinically significant depressive symptoms. Clinically significant symptoms were associated with posttrauma impairment in social and occupational functioning. Acute distress was associated with several variables, including aspects of Air Show trauma exposure, severity of prior trauma exposure, low posttrauma social support (ie, negative responses by others), indices of poor coping (eg, intolerance of uncertainty, rumination about the trauma), and elevated scores on anxiety sensitivity, the personality trait of absorption, and dissociative tendencies. Results suggest that clinically significant acute distress is common in the aftermath of witnessed trauma. The statistical predictors (correlates) of acute distress were generally consistent with the results of studies of other forms of trauma. People with elevated scores on theoretical vulnerability factors (eg, elevated anxiety sensitivity) were particularly likely to develop acute distress.

Gregor Henze | Research | NREL

Science.gov (United States)

fundamentals, mechanical systems design, energy system modeling, building control and automation systems energy system operations with the electric grid system. He is a professional mechanical engineer

Ungari fotograafiast / Gregor Taul

Index Scriptorium Estoniae

Taul, Gregor, 1986-

2010-01-01

Näitus "Robert Capa" Ludwig Muzeumis Budapestis 3. juulist 11. oktoobrini 2009. Näitus "Traditsioon ja vastuvõtlikkus - kaasaegsed arengusuunad Ungari fotokunstis" ArtDepoo galeriis 2. septembrist 29. septembrini 2009. Fotograaf Robert Capa (Endre Ernö Friedmann, sünd. 1913) elust ja karjäärist

A Framework for Synthesizing the United States Code in Support of Cyberspace Operations

Science.gov (United States)

2016-03-01

A Centennial History, 1908–2008,” (Washington DC: GPO, 2008), 98– 115, https://www.fbi.gov/about-us/history/a- centennial -history/the-fbi-a- centennial ...www.fbi.gov/wanted/ cyber. ———. Federal Bureau of Investigation. “The FBI: A Centennial History, 1908– 2008.” Washington DC: Government Publishing...Office, 2008. https://www.fbi.gov/about-us/history/a- centennial -history/the-fbi-a- centennial -history-1908-2008. ———. Federal Bureau of Investigation

Coma

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

Cerebral Arteriosclerosis

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

Moyamoya Disease

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

Fibromuscular Dysplasia

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

Binswanger's Disease

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

Locked-In Syndrome

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

NINDS Traumatic Brain Injury Information Page

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

Wallenberg's Syndrome

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... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org http://www. ... Stroke Association 9707 East Easter Lane Suite B Centennial CO Centennial, CO 80112-3747 info@stroke.org ...

77 FR 62429 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

Science.gov (United States)

2012-10-15

...), Amdt 25 Denver, CO, Centennial, NDB RWY 35R, Amdt 10B, CANCELED Denver, CO, Centennial, RNAV (GPS) RWY 17L, Orig Denver, CO, Centennial, RNAV (GPS) RWY 28, Amdt 1 Denver, CO, Centennial, RNAV (GPS) Y RWY 35R, Amdt 1 Denver, CO, Centennial, RNAV (GPS) Z RWY 35R, Orig Denver, CO, Denver Intl, ILS OR LOC RWY...

Gregor@night: The future high-resolution stellar spectrograph for the GREGOR solar telescope

Czech Academy of Sciences Publication Activity Database

Strassmeier, K.G.; Ilyin, I.V.; Woche, M.; Granzer, T.; Weber, M.; Weingrill, J.; Bauer, S.-M.; Popow, E.; Denker, C.; Schmidt, W.; von der Lühe, O.; Berdyugina, S.; Collados Vera, M.; Koubský, Pavel; Hackman, T.; Mantere, M.J.

2012-01-01

Roč. 333, č. 9 (2012), s. 901-910 ISSN 0004-6337 Institutional support: RVO:67985815 Keywords : spesctrographs * telescope Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 1.399, year: 2012

Controle de Brevipalpus phoenicis (Geijskes, 1939 e Oligonychus ilicis (McGregor, 1917 (Acari: Tenuipalpidae, Tetranychidae em cafeeiro e o impacto sobre ácaros benéficos: II - Spirodiclofen e Azocyclotin Control of Brevipalpus phoenicis (Geijskes, 1939 and Oligonychus ilicis (McGregor, 1917 (Acari: Tenuipalpidae, Tetranychidae in coffee plants and the impact on beneficial mites: II - Spirodiclofen and Azocyclotin

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Paulo Rebelles Reis

2005-06-01

Full Text Available O ácaro Brevipalpus phoenicis (Geijskes é importante em cafeeiro (Coffea spp. por ser o vetor do vírus da mancha-anular, doença responsável por queda de folhas e má qualidade da bebida do café, e o ácaro-vermelho Oligonychus ilicis (McGregor por reduzir a área foliar de fotossíntese. Ácaros da família Phytoseiidae, de várias espécies, são eficientes predadores associados aos ácaros-praga. Conduziu-se este trabalho com o objetivo de estudar o controle dos ácaros-praga com spirodiclofen e azocyclotin, e o impacto sobre fitoseídeos. Em laboratório foram estudados os efeitos ovicida, tópico, residual, tópico mais residual e a seletividade fisiológica aos fitoseídeos; em casa-de-vegetação foi avaliada a persistência no controle às duas espécies de ácaros-praga; e em campo foi avaliada a eficiência apenas no controle de B. phoenicis. Os bioensaios foram realizados em arenas de folhas destacadas. O efeito ovicida foi avaliado em ovos no início e final de incubação. Os efeitos residual, tópico e tópico mais residual foram avaliados pela mortalidade de larvas, ninfas e adultos aos oito dias, e a persistência até 30 dias após a aplicação. A seletividade aos fitoseídeos foi avaliada, pelo efeito na mortalidade e reprodução de fêmeas adultas, em teste residual em superfície de vidro. Spirodiclofen e azocyclotin (SC mostraram eficiente ação ovicida, principalmente para ovos de B. phoenicis no início de incubação. Para ovos de O. ilicis, somente o spirodiclofen apresentou efeito ovicida. Em geral, os efeitos tópico e residual associados melhoraram a eficiência dos produtos no controle das fases pós-embrionárias de ambas as espécies. O spirodiclofen apresentou seletividade aos ácaros predadores, já o azocyclotin foi nocivo. Em campo, ambos os acaricidas mostram-se altamente eficientes na redução de todas as fases pós-embrionárias do ácaro B. phoenicis, principalmente nas folhas.The mite Brevipalpus

77 FR 59950 - Changes in Flood Hazard Determinations

Science.gov (United States)

2012-10-01

.../. West 92nd Avenue, 80031. Westminster, CO 80031. Arapahoe City of Centennial The Honorable Southeast.../ Mayor, City of Authority, 76 index.php/colorado/ Centennial, 13133 Inverness Drive arapahoe/. East Arapahoe East, Suite A, Road, Centennial, Centennial, CO CO 80112. 80112. Arapahoe Unincorporated The...

Construcción de la memoria oficial en el Centenario de la Independencia: el Compendio de Historia de Colombia de Henao y Arrubla The construction of the official memory of the Independence Centennial: The Colombian History Text Book by Henao and Arrubla

Directory of Open Access Journals (Sweden)

Sandra Patricia Rodríguez Ávila

2010-07-01

Full Text Available Este artículo presenta los referentes de la memoria oficial, transmitidos en el texto escolar de Henao y Arrubla, que fue premiado durante las celebraciones del Centenario de la Independencia de Colombia en 1910 y se mantuvo en circulación hasta los años sesenta, por efecto de la articulación de dispositivos mnemotécnicos, de memorización y rememoración, que establecieron los principios de orden, verdad y valores hispánicos, desde los cuales se construyó la memoria dominante durante la primera mitad del siglo XX.In this paper, an analysis of the official memory of Colombian history, as it is presented in the textbook by Henao y Arrubla is made. This textbook is crucial in the analysis because it was awarded during the Centennial of Independence (1910. By reviewing the conditions in which the Commission of the Centennial designed the contest, the actions taken to achieve the official adoption of this text book and the curricular strategies for the organization of a symbolic scheme in school contexts, this article shows the mnemonic devices of memorization and remembrance which Henao and Arrubla textbook exhibits, in order for the Hispanic truths and values to become the dominant referent of the Independence during the XXth Century.

77 FR 50626 - Changes in Flood Elevation Determinations

Science.gov (United States)

2012-08-22

.... Street, Peoria, AZ 85345. Colorado: Arapahoe (FEMA Docket No.: B- City of Centennial December 8, 2011... of The Littleton Centennial, 13133 East Independent. Arapahoe Road, Centennial, CO 80112. Arapahoe (FEMA Docket No.: B- City of Centennial December 8, 2011; The Honorable Cathy Noon, April 13, 2012...

78 FR 47330 - Changes in Flood Hazard Determinations

Science.gov (United States)

2013-08-05

...: Arapahoe City of The Honorable Southeast Metro http:// August 30, 2013 080315 Centennial (13- Cathy Noon, Stormwater www.bakeraecom.com/ 08-0083P). Mayor, City of Authority, 76 index.php/colorado/ Centennial, Inverness Drive arapahoe/. 13133 East East, Suite A, Arapahoe Road, Centennial, CO Centennial, CO 80112...

77 FR 76494 - Changes in Flood Hazard Determinations

Science.gov (United States)

2012-12-28

..., Suite 11, Downieville, CA 95936. Colorado: Arapahoe (FEMA Docket No.: B- City of Centennial The... Authority, 76 of Centennial, Inverness Drive East, 13133 East Arapahoe Suite A, Centennial, CO Road, Centennial, 80112. CO 80112. Arapahoe (FEMA Docket No.: B- City of Greenwood The Honorable Ron City Hall...

77 FR 12501 - Changes in Flood Elevation Determinations

Science.gov (United States)

2012-03-01

... Monroe Business Gazette. Street, Peoria, AZ 85345. Colorado: Arapahoe City of Centennial December 8, 2011... Littleton Centennial, 13133 East Independent. Arapahoe Road, Centennial, CO 80112. Arapahoe City of Centennial December 8, 2011; The Honorable Cathy Noon, April 13, 2012 080315 (11-08-1095P). December 15, 2011...

77 FR 56664 - Changes in Flood Hazard Determinations

Science.gov (United States)

2012-09-13

... Centennial The Honorable Southeast Metro http:// August 3, 2012........ 080315 (12-08-0025P). Cathy Noon, Stormwater www.bakeraecom.com/ Mayor, City of Authority, 76 index.php/colorado/ Centennial, 13133 Inverness Drive arapahoe/. East Arapahoe East, Suite A, Road, Centennial, Centennial, CO CO 80112. 80112. Arapahoe...

77 FR 76497 - Changes in Flood Hazard Determinations

Science.gov (United States)

2012-12-28

.... 80031. Arapahoe (FEMA Docket No.: B- City of Centennial The Honorable Cathy Noon, Southeast Metro October 29, 2012 080315 1269). (12-08-0411P). Mayor, City of Stormwater Centennial, 13133 East Authority, 76 Arapahoe Road Inverness Drive Centennial, CO 80112. East, Suite A, Centennial, CO 80112. Arapahoe...

Visit at CERN of representatives of the Department of Piacenza (Italy), received by Lucio Rossi and Ugo Amaldi and hosted by the DG. The department of Piacenza is the native land of Edoardo Amaldi, one of the founding fathers of CERN, and the Department is preparing the celebration of the centennial of his birth.

CERN Multimedia

Maximilien Brice

2008-01-01

Visit at CERN of representatives of the Department of Piacenza (Italy), received by Lucio Rossi and Ugo Amaldi and hosted by the DG. The department of Piacenza is the native land of Edoardo Amaldi, one of the founding fathers of CERN, and the Department is preparing the celebration of the centennial of his birth.

78 FR 35302 - Changes in Flood Hazard Determinations

Science.gov (United States)

2013-06-12

..., Brighton, CO 80601. Arapahoe (FEMA Docket No.: B- City of Centennial The Honorable Cathy Southeast Metro April 12, 2013 080315 1294). (12-08-0553P). Noon, Mayor, City Stormwater Authority, 76 of Centennial, Inverness Drive East, 13133 East Arapahoe Suite A, Centennial, CO Road, Centennial, 80112. CO 80112. Weld...

Increasing Megadrought Risk at the Intersection of Decadal to Centennial Variability and Climate Change

Science.gov (United States)

Overpeck, J. T.; Parsons, L. A.; Loope, G. R.; Ault, T.; Cole, J. E.; Otto-Bliesner, B. L.; Buckle, N.; Stevenson, S.; Fasullo, J.

2016-12-01

Even more than the 1930's U.S. Dust Bowl Drought, the 20th century Sahel drought stands out as the most unprecedented drought of the instrumental era, in part because it extended over multiple decades. Paleoclimatic evidence makes it clear that this Sahel drought was nonetheless not really unprecedented - droughts many decades long have occurred in sub-Saharan Africa regularly over the last several thousand years, and these constitute what is now increasingly referred to as "megadrought." Paleoclimatic evidence also makes it clear that all drought-prone semi-arid and arid regions of the globe, including southwestern North America, southeastern Australia, and the Mediterranean/Middle Eastern region likely experienced multiple such multidecadal megadroughts in recent pre-Anthropocene Earth history. In other regions of the globe, including parts of South Asia and Amazonia, short but devastating droughts of the last 50-150 years, were also eclipsed in recent Earth history by much more serious megadrought, although these megadroughts were shorter than the multidecadal droughts of Africa or SW North America. In the past, megadroughts have occurred for reasons that are increasingly well understood in terms of ocean-atmosphere dynamics that led to unusually persistent precipitation deficits. Many of these same dynamics are well simulated in state-of-the-art Earth System Models, and yet comparisons between simulated and observed paleohydroclimatic variability suggests the models generally underestimate the risk of megadrought. Paleohydroclimatic records in some cases overestimate drought persistence, but there appear to be other issues at play that need to be better understood and simulated: positive land-atmosphere feedbacks, overly energetic interannual (i.e., ENSO) modes of variability, and insufficient internal multidecadal to centennial coupled climate system variability. Taking these issues and the impact of anthropogenic climate change into account means that the

Beaver dams and channel sediment dynamics on Odell Creek, Centennial Valley, Montana, USA

Science.gov (United States)

Levine, Rebekah; Meyer, Grant A.

2014-01-01

Beaver dams in streams are generally considered to increase bed elevation through in-channel sediment storage, thus, reintroductions of beaver are increasingly employed as a restoration tool to repair incised stream channels. Here we consider hydrologic and geomorphic characteristics of the study stream in relation to in-channel sediment storage promoted by beaver dams. We also document the persistence of sediment in the channel following breaching of dams. Nine reaches, containing 46 cross-sections, were investigated on Odell Creek at Red Rock Lakes National Wildlife Refuge, Centennial Valley, Montana. Odell Creek has a snowmelt-dominated hydrograph and peak flows between 2 and 10 m3 s- 1. Odell Creek flows down a fluvial fan with a decreasing gradient (0.018-0.004), but is confined between terraces along most of its length, and displays a mostly single-thread, variably sinuous channel. The study reaches represent the overall downstream decrease in gradient and sediment size, and include three stages of beaver damming: (1) active; (2) built and breached in the last decade; and (3) undammed. In-channel sediment characteristics and storage were investigated using pebble counts, fine-sediment depth measurements, sediment mapping and surveys of dam breaches. Upstream of dams, deposition of fine (≤ 2 mm) sediment is promoted by reduced water surface slope, shear stress and velocity, with volumes ranging from 48 to 182 m3. High flows, however, can readily transport suspended sediment over active dams. Variations in bed-sediment texture and channel morphology associated with active dams create substantial discontinuities in downstream trends and add to overall channel heterogeneity. Observations of abandoned dam sites and dam breaches revealed that most sediment stored above beaver dams is quickly evacuated following a breach. Nonetheless, dam remnants trap some sediment, promote meandering and facilitate floodplain development. Persistence of beaver dam sediment

Final Progress Report: Collaborative Research: Decadal-to-Centennial Climate & Climate Change Studies with Enhanced Variable and Uniform Resolution GCMs Using Advanced Numerical Techniques

Energy Technology Data Exchange (ETDEWEB)

Fox-Rabinovitz, M; Cote, J

2009-06-05

The joint U.S-Canadian project has been devoted to: (a) decadal climate studies using developed state-of-the-art GCMs (General Circulation Models) with enhanced variable and uniform resolution; (b) development and implementation of advanced numerical techniques; (c) research in parallel computing and associated numerical methods; (d) atmospheric chemistry experiments related to climate issues; (e) validation of regional climate modeling strategies for nested- and stretched-grid models. The variable-resolution stretched-grid (SG) GCMs produce accurate and cost-efficient regional climate simulations with mesoscale resolution. The advantage of the stretched grid approach is that it allows us to preserve the high quality of both global and regional circulations while providing consistent interactions between global and regional scales and phenomena. The major accomplishment for the project has been the successful international SGMIP-1 and SGMIP-2 (Stretched-Grid Model Intercomparison Project, phase-1 and phase-2) based on this research developments and activities. The SGMIP provides unique high-resolution regional and global multi-model ensembles beneficial for regional climate modeling and broader modeling community. The U.S SGMIP simulations have been produced using SciDAC ORNL supercomputers. Collaborations with other international participants M. Deque (Meteo-France) and J. McGregor (CSIRO, Australia) and their centers and groups have been beneficial for the strong joint effort, especially for the SGMIP activities. The WMO/WCRP/WGNE endorsed the SGMIP activities in 2004-2008. This project reflects a trend in the modeling and broader communities to move towards regional and sub-regional assessments and applications important for the U.S. and Canadian public, business and policy decision makers, as well as for international collaborations on regional, and especially climate related issues.

Talentide kooshoidmine / Jena McGregor

Index Scriptorium Estoniae

McGregor, Jena

2008-01-01

Töötajate eest hoolitsemisest, nende moraali tõstmisest ning heade töötajate hoidmisest ettevõttes majandusliku languse tingimustes. Lisa: Tegevuskava. Vt. samas: Michelle Conlin. Kuidas rasketel aegadel särada

Meeskonnakoolitus vs individuaalkoolitus / Mariel Gregor

Index Scriptorium Estoniae

Gregor, Mariel

2007-01-01

Ülo Vihma ja Kristel Jalak individuaalsest ja meeskondlikust koolitusest. Mis räägib meeskondliku koolituse kasuks. K. Jalaku hinnangul peaks hea koolitusprogramm olema kombineeritud mõlemast koolitusviisist, kus üks täiendab teist, mitte ei asenda

Factors affecting the inter-annual to centennial timescale variability of Indian summer monsoon rainfall

Science.gov (United States)

Malik, Abdul; Brönnimann, Stefan

2018-06-01

The Modes of Ocean Variability (MOV) namely Atlantic Multidecadal Oscillation (AMO), Pacific Decadal Oscillation (PDO), and El Niño Southern Oscillation (ENSO) can have significant impacts on Indian Summer Monsoon Rainfall (ISMR) on different timescales. The timescales at which these MOV interacts with ISMR and the factors which may perturb their relationship with ISMR need to be investigated. We employ De-trended Cross-Correlation Analysis (DCCA), and De-trended Partial-Cross-Correlation Analysis (DPCCA) to study the timescales of interaction of ISMR with AMO, PDO, and ENSO using observational dataset (AD 1854-1999), and atmosphere-ocean-chemistry climate model simulations with SOCOL-MPIOM (AD 1600-1999). Further, this study uses De-trended Semi-Partial Cross-Correlation Analysis (DSPCCA) to address the relation between solar variability and the ISMR. We find statistically significant evidence of intrinsic correlations of ISMR with AMO, PDO, and ENSO on different timescales, consistent between model simulations and observations. However, the model fails to capture modulation in intrinsic relationship between ISRM and MOV due to external signals. Our analysis indicates that AMO is a potential source of non-stationary relationship between ISMR and ENSO. Furthermore, the pattern of correlation between ISMR and Total Solar Irradiance (TSI) is inconsistent between observations and model simulations. The observational dataset indicates statistically insignificant negative intrinsic correlation between ISMR and TSI on decadal-to-centennial timescales. This statistically insignificant negative intrinsic correlation is transformed to statistically significant positive extrinsic by AMO on 61-86-year timescale. We propose a new mechanism for Sun-monsoon connection which operates through AMO by changes in summer (June-September; JJAS) meridional gradient of tropospheric temperatures (ΔTTJJAS). There is a negative (positive) intrinsic correlation between ΔTTJJAS (AMO) and

Feasibility of Using Alternate Fuels in the U.S. Antarctic Program: Initial Assessment

Science.gov (United States)

2017-09-01

Polar Programs. Morris, A. 2015a. Email communication. 21 April. Centennial , CO: Antarctic Support Contractor. ———. 2015b. Personal...communication. 19 May. Centennial , CO: Antarctic Support Contractor. ———. 2014. Email communication. 24 November. Centennial , CO: Antarctic Support

Colloquium on Youth Day 16 June 2017: The Commission of Faith and Order of the World Council of Churches in association with the Faculty of Theology of the University of Pretoria and its centennial celebration in 2017

Directory of Open Access Journals (Sweden)

Andries G. Van Aarde

2017-11-01

Full Text Available This article represents the contributions of ecclesiastical and academic office bearers participating in the centennial celebration of the Faculty of Theology of the University of Pretoria on Youth Day 16 June 2017, in collaboration with the Faith and Order Commission of the World Council of Churches. This Youth Day commemoration showcases the profound way of transformation at the University of Pretoria and, in particular, its theological faculty in democratic South Africa since 1994. It presents a truly historic event, highlighting a global participation of specifically the Reformed churches in South Africa after a period of ecumenical isolation because of a formerly endorsement of apartheid, nowadays confessed as a theological and humanitarian heresy.

78 FR 32673 - Changes in Flood Hazard Determinations

Science.gov (United States)

2013-05-31

... Center Drive, 91730. Rancho Cucamonga, CA 91730. Colorado: Arapahoe City of Centennial The Honorable....com/ Mayor, City of Authority, 76 index.php/colorado/ Centennial, 13133 Inverness Drive arapahoe/. East Arapahoe East, Suite A, Road, Centennial, Englewood, CO CO 80112. 80112. Boulder City of Boulder...

75 FR 45675 - Notice of Permit Applications Received Under the Antarctic Conservation Act of 1978 (Pub. L. 95-541)

Science.gov (United States)

2010-08-03

.... Applicant: Sam Feola, Director, Raytheon Polar Services Company, 7400 South Tucson Way, Centennial, CO 80112..., Raytheon Polar Services Company, 7400 South Tucson Way, Centennial, CO 80112. Activity for Which Permit is... Way, Centennial, CO 80112. Activity for Which Permit is Requested: Enter Antarctic Specially Protected...

78 FR 52951 - Changes in Flood Hazard Determinations

Science.gov (United States)

2013-08-27

...- City of Centennial The Honorable Cathy Southeast Metro June 28, 2013 080315 1320). (13-08-0282P). Noon, Mayor, City of Stormwater Authority, Centennial, 13133 East 76 Inverness Drive Arapahoe Road, East, Suite A, Centennial, CO 80112. Englewood, CO 80112. Boulder (FEMA Docket No.: B- City of Boulder (12...

77 FR 41809 - Notice of Permit Applications Received Under the Antarctic Conservation Act of 1978

Science.gov (United States)

2012-07-16

..., Lockheed Martin IS&GS, Antarctic Support Contract, 7400 S. Tucson Way, Centennial, CO 80112-3938. Activity..., Antarctic Support Contract, 7400 S. Tucson Way, Centennial, CO 80112-3938. Activity for Which Permit Is.... Applicant: Celia Lang, Lockheed Martin IS&GS, Antarctic Support Contract, 7400 S. Tucson Way, Centennial, CO...

75 FR 5812 - Notice of Applications for Deregistration Under Section 8(f) of the Investment Company Act of 1940

Science.gov (United States)

2010-02-04

... Address: 6803 S Tucson Way, Centennial, CO 80112. Oppenheimer SMA International Bond Fund [File No. 811... January 13, 2010. Applicant's Address: 6803 S Tucson Way, Centennial, CO 80112. Regions Morgan Keegan... Address: 6803 S. Tucson Way, Centennial, CO 80112. BlackRock Broad Investment Grade 2009 Term Trust Inc...

Collaborative Project. Understanding the effects of tides and eddies on the ocean dynamics, sea ice cover and decadal/centennial climate prediction using the Regional Arctic Climate Model (RACM)

Energy Technology Data Exchange (ETDEWEB)

Hutchings, Jennifer [Univ. of Alaska, Fairbanks, AK (United States); Joseph, Renu [Univ. of Alaska, Fairbanks, AK (United States)

2013-09-14

The goal of this project is to develop an eddy resolving ocean model (POP) with tides coupled to a sea ice model (CICE) within the Regional Arctic System Model (RASM) to investigate the importance of ocean tides and mesoscale eddies in arctic climate simulations and quantify biases associated with these processes and how their relative contribution may improve decadal to centennial arctic climate predictions. Ocean, sea ice and coupled arctic climate response to these small scale processes will be evaluated with regard to their influence on mass, momentum and property exchange between oceans, shelf-basin, ice-ocean, and ocean-atmosphere. The project will facilitate the future routine inclusion of polar tides and eddies in Earth System Models when computing power allows. As such, the proposed research addresses the science in support of the BER’s Climate and Environmental Sciences Division Long Term Measure as it will improve the ocean and sea ice model components as well as the fully coupled RASM and Community Earth System Model (CESM) and it will make them more accurate and computationally efficient.

78 FR 10265 - Pricing for the 2013 Commemorative Coin Programs-Silver and Clad Coin Options

Science.gov (United States)

2013-02-13

.... SUMMARY: The United States Mint is announcing prices for the 2013 Girl Scouts of the USA Centennial Silver.... Introductory Product price Regular price 2013 Girl Scouts of the USA Centennial $54.95 $59.95 Proof Silver Dollar 2013 Girl Scouts of the USA Centennial 50.95 55.95 Uncirculated Silver Dollar 2013 5-Star Generals...

Speciation of heavy metals in different grain sizes of Jiaozhou Bay sediments: Bioavailability, ecological risk assessment and source analysis on a centennial timescale.

Science.gov (United States)

Kang, Xuming; Song, Jinming; Yuan, Huamao; Duan, Liqin; Li, Xuegang; Li, Ning; Liang, Xianmeng; Qu, Baoxiao

2017-09-01

Heavy metal contamination is an essential indicator of environmental health. In this work, one sediment core was used for the analysis of the speciation of heavy metals (Cr, Mn, Ni, Cu, Zn, As, Cd, and Pb) in Jiaozhou Bay sediments with different grain sizes. The bioavailability, sources and ecological risk of heavy metals were also assessed on a centennial timescale. Heavy metals were enriched in grain sizes of Pb > Cd > Zn > Cu >Ni > Cr > As. Enrichment factors (EF) indicated that heavy metals in Jiaozhou Bay presented from no enrichment to minor enrichment. The potential ecological risk index (RI) indicated that Jiaozhou Bay had been suffering from a low ecological risk and presented an increasing trend since 1940s owing to the increase of anthropogenic activities. The source analysis indicated that natural sources were primary sources of heavy metals in Jiaozhou Bay and anthropogenic sources of heavy metals presented an increasing trend since 1940s. The principal component analysis (PCA) indicated that Cr, Mn, Ni, Cu and Pb were primarily derived from natural sources and that Zn and Cd were influenced by shipbuilding industry. Mn, Cu, Zn and Pb may originate from both natural and anthropogenic sources. As may be influenced by agricultural activities. Moreover, heavy metals in sediments of Jiaozhou Bay were clearly influenced by atmospheric deposition and river input. Copyright © 2017. Published by Elsevier Inc.

Women as Mendelians and Geneticists

Science.gov (United States)

Richmond, Marsha L.

2015-01-01

After the rediscovery of Mendel's laws of heredity in 1900, the biologists who began studying heredity, variation, and evolution using the new Mendelian methodology—performing controlled hybrid crosses and statistically analyzing progeny to note the factorial basis of characters—made great progress. By 1910, the validity of Mendelism was widely recognized and the field William Bateson christened `genetics' was complemented by the chromosome theory of heredity of T. H. Morgan and his group in the United States. Historians, however, have largely overlooked an important factor in the early establishment of Mendelism and genetics: the large number of women who contributed to the various research groups. This article examines the social, economic, and disciplinary context behind this new wave of women's participation in science and describes the work of women Mendelians and geneticists employed at three leading experimental research institutes, 1900-1940. It argues that the key to more women working in science was the access to higher education and the receptivity of emerging interdisciplinary fields such as genetics to utilize the expertise of women workers, which not only advanced the discipline but also provided new opportunities for women's employment in science.

Realizing the Dream of Flight: Biographical Essays in Honor of the Centennial of Flight, 1903-2003

Science.gov (United States)

Dawson, Virginia P. (Editor); Bowles, Mark D. (Editor)

2005-01-01

While growing up in Cedar Rapids, Iowa, Milton Wright, The Wright Brothers Father, liked to purchase toys for his sons that he hoped would stimulate their imagination. One of the most memorable gifts was a toy helicopter that was designed by the French aeronautical experimenter Alphonse P naud. Milton gave his sons this gift in 1878, and, though it was a simple device with a stick bound to a four-blade rotor set in a spindle, it had the intended effect it caused them to dream. Twenty-five years separated the gift of this toy and their invention of the airplane, yet the Wright brothers were convinced it had exerted an important influence. Tom Crouch argued in The Bishop's Boys that toys like these perfectly illustrated the significance of play for technological innovation. He wrote, rotary-wing toys were to intrigue and inspire generations of children, a few of whom would, as adults, attempt to realize the dream of flight for themselves. If the first powered flight on 17 December 1903 represented a childhood dream realized, it was only the first step in the rapid evolution of the airplane from their flimsy kite-like contraption of wood and cloth to jet airliners and rockets in space. And, as extraordinary as the achievement of powered flight seemed in 1903, before the end of the century, space travel also would become a dream realized. Soviet astronaut Yuri Gagarin first circumnavigated Earth in April 1961, and, eight years later, American astronauts took the first steps for humankind on the Moon. It is with great pleasure that we introduce Realizing the Dream: Biographical Essays in Honor of the Centennial of Flight. These essays in celebration of the Wright brothers first flight 100 years ago grew out of presentations by a group of prominent scholars in 2003 at a conference sponsored by the NASA History Division and held at the Great Lakes Science Center in Cleveland, Ohio. The volume focuses on the careers of some of the many men and women who helped to realize

Mid-Holocene onset of high-amplitude decadal to centennial scale variability along the Peru Chile Margin

Science.gov (United States)

Chazen, C. R.; Altabet, M.; Herbert, T. D.

2008-12-01

Understanding the natural climate variations in the eastern tropical Pacific is crucial for predicting the evolution of the El Niño-Southern Oscillation (ENSO) system and for anticipating the ways in which increases in atmospheric CO2 will affect climate. Here we present the first continuous, high-resolution (11-12 yr) climate record across the mid-Holocene transition (10ka-1.4ka) from the Peru-Chile Margin near the epicenter of the modern ENSO system. Although the high productivity of the Peru margin should promote high deposition rates, and the anaerobic bottom water conditions should inhibit sediment mixing by benthic organisms, nearly all sediment cores recovered from this region suffer from major gaps in Holocene sedimentation. Our data comes from a ~5 meter piston core collected from the mid-Peruvian shelf (15° 15"S, 75° 58"W, ~250mwd) in the heart of the oxygen minimum/denitrification zone that provides the first uninterrupted archive of conditions along the Peru-Chile margin. A suite of geochemical proxies allow us to reconstruct sea surface temperature (SST- Uk'37), phytoplankton productivity (C37total and %BSi), and thermocline ventilation (δ15N), variables that are tightly correlated to ENSO events today. Despite the observation that the mean late Holocene state of all three variables did not change over the last 10,000 years, our data reveal a dramatic increase in climate variability after the mid Holocene (~5ka); represented by prolonged periods (50-200yrs) of climate extremes, which are absent in the early Holocene. To further investigate these climate extremes we examine benthic foraminiferal assemblages and oxygen isotopes in combination with our other proxy records in selected late Holocene sections. The roughly centennial-scale oscillations do not show typical El Niño-La Niña correlations between proxies. We therefore posit that a significant fraction of super-ENSO variance during the course of the Holocene may originate outside the tropics

GREGOR solar telescope: Design and status

Czech Academy of Sciences Publication Activity Database

Volkmer, R.; von der Lühe, O.; Denker, C.; Solanki, S.K.; Balthasar, H.; Berkefeld, T.; Caligari, P.; Collados Vera, M.; Fischer, A.; Halbgewachs, C.; Heidecke, F.; Hofmann, A.; Klvaňa, Miroslav; Kneer, F.; Lagg, A.; Popow, E.; Schmidt, D.; Schmidt, W.; Sobotka, Michal; Soltau, D.; Strassmeier, K.G.

2010-01-01

Roč. 331, č. 6 (2010), s. 624-627 ISSN 0004-6337 Institutional research plan: CEZ:AV0Z10030501 Keywords : instrumentation * adaptive optics * high angular resolution Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 0.842, year: 2010

Evolved Expendable Launch Vehicle (EELV)

Science.gov (United States)

2015-12-15

FY13+ Phase I Buy Contractor: United Launch Services, LLC Contractor Location: 9501 East Panorama Circle Centennial , CO 80112 Contract Number...Contract Name: FY13+ Phase I Buy Contractor: United Launch Services, LLC Contractor Location: 9501 East Panorama Circle Centennial , CO 80112 Contract...FY12 EELV Launch Services (ELS5) Contractor: United Launch Services, LLC. Contractor Location: 9501 East Panorama Circle Centennial , CO 80112

Pollen record of the mid- to late-Holocene centennial climate change on the East coast of South Korea and its influential factors

Science.gov (United States)

Song, Bing; Yi, Sangheon; Jia, Hongjuan; Nahm, Wook-Hyun; Kim, Jin-Cheul; Lim, Jaesoo; Lee, Jin-Young; Sha, Longbin; Mao, Limi; Yang, Zhongyong; Nakanishi, Toshimichi; Hong, Wan; Li, Zhen

2018-01-01

To understand historical climate change in western Pacific coastal areas, a sediment core (SOJ-2) from the stable sedimentary environment of the Songjiho Lagoon on the east coast of South Korea was obtained for centennial-resolution palynological analysis. The ages of the SOJ-2 core is well controlled by carbon 14 dating with high-resolution accelerator mass spectrometry (AMS), and the results indicated a general warm to cold climate trend from the mid-Holocene to the present, which can be divided into two different stages: a warmer stage between 6842 and 1297 cal yr BP and a colder stage from 1297 cal yr BP to the present, with fluctuations during these stages. The climate was wetter from 6842 to 6227 cal yr BP and 4520 to 1297 cal yr BP and was drier from 6227 to 4520 cal yr BP. The climate changed to cold and dry during the period from 1297-425 cal yr BP. The impact of human activity on the climate began at approximately 1297 cal yr BP and became pronounced starting in 425 cal yr BP. The general cooling trend may represent a response to decreasing solar insolation; however, the relative dryness or wetness of the climate may have been co-determined by westerlies and the East Asian summer monsoon (EASM). The climate had a teleconnection with the North Atlantic region, resulting from changes in solar activity. Nevertheless, EI Niño-Southern Oscillation (ENSO) activity played an important role in impacting the EASM changes in western Pacific coastal areas.

Surficial geologic map of the Red Rock Lakes area, southwest Montana

Science.gov (United States)

Pierce, Kenneth L.; Chesley-Preston, Tara L.; Sojda, Richard L.

2014-01-01

The Centennial Valley and Centennial Range continue to be formed by ongoing displacement on the Centennial fault. The dominant fault movement is downward, creating space in the valley for lakes and the deposition of sediment. The Centennial Valley originally drained to the northeast through a canyon now represented by a chain of lakes starting with Elk Lake. Subsequently, large landslides blocked and dammed the drainage, which created Lake Centennial, in the Centennial Valley. Sediments deposited in this late Pleistocene lake underlie much of the valley floor and rest on permeable sand and gravel deposited when the valley drained to the northeast. Cold Pleistocene climates enhanced colluvial supply of gravelly sediment to mountain streams and high peak flows carried gravelly sediment into the valley. There, the lower gradient of the streams resulted in deposition of alluvial fans peripheral to Lake Centennial as the lake lowered through time to the level of the two present lakes. Pleistocene glaciers formed in the high Centennial Range, built glacial moraines, and also supplied glacial outwash to the alluvial fans. Winds from the west and south blew sand to the northeast side of the valley building up high dunes. The central part of the map area is flat, sloping to the west by only 0.6 meters in 13 kilometers (2 feet in 8 miles) to form a watery lowland. This lowland contains Upper and Lower Red Rock Lakes, many ponds, and peat lands inside the “water plane,” above which are somewhat steeper slopes. The permeable sands and gravels beneath Lake Centennial sediments provide a path for groundwater recharged from the adjacent uplands. This groundwater leaks upward through Lake Centennial sediments and sustains wetland vegetation into late summer. Upper and Lower Red Rock Lakes are formed by alluvial-fan dams. Alluvial fans converge from both the south and the north to form outlet thresholds that dam the two shallow lakes upstream. The surficial geology aids in

75 FR 4451 - Notification of United States Mint 2010 Commemorative Coin Pricing

Science.gov (United States)

2010-01-27

... Dollar and the 2010 Boy Scouts of America Centennial Silver Dollar Programs. Public Laws 110-227 and 110... Scouts of America Centennial Silver Dollar Commemorative Coins, respectively. [[Page 4452

78 FR 35033 - Formations of, Acquisitions by, and Mergers of Bank Holding Companies

Science.gov (United States)

2013-06-11

... shares of Ashland Bancshares, Inc., and thereby indirectly acquire Centennial Bank, both in Omaha... Holding Company, Inc., and immediately thereafter, Omaha State Bank, will merge with and into Centennial...

Plant physiology at the institute for philosophy in Brno in Mendel’s teacher F. Diebl textbook from 1835

Directory of Open Access Journals (Sweden)

Jiří Šebánek

2012-01-01

Full Text Available Gregor Mendel attended lectures of F. Diebl, professor of natural history and agricultural science at the Institute of Philosophy in Brno. Diebl published his lectures in a textbook “Abhandlungen über die allgemeine und besondere Naturgeschichte, Brünn 1835.” From the textbook the level of scientific knowledge in plant biology is obvious, with which the later founder of a new field of biology – genetics got acquainted. Diebl considered germination to be a specific method of fermentation transforming seed starch into a sugary matter which nourishes the germinating plant. In the physiology of nutrition he distinguished nutrition from the soil via roots from nutrition from the air via leaves. The former is based primarily on the humus theory of A. Thaer (1809 because not until 5 years after the publication of Diebl’s textbook J. Liebig initiated the mineral theory. Diebl’s presentation of photosynthesis was based on information available at that time about the release of oxygen by green plants under conditions of light and the uptake of CO2, but he had no knowledge about the passage of CO2 into the leaves through stomata. Remarkable is Diebl’s discovery that respiration increases during flowering. Electricity is considered to be a force significantly supporting the life processes of plants. Diebl also noticed the difference between diurnal and night evaporation of water from the leaves. In his textbook growth is connected with nutrition only, as it was the entire 19th century. Stem thickening from the cambium is described very simply. Bud and root regeneration is given the term reproduction which today is commonly used in relation to sexual reproduction. Diebl considered nyctinastic movements (bending or unbending of the leaves and closing of the flowers at night to be “sleep”. He described fertilisation in a primitive way, because it was not until 1848 that the first exact description came out.

78 FR 51816 - Notice of Actions on Special Permit Applications

Science.gov (United States)

2013-08-21

....205. to authorize ultrasonic Centennial, CO. equipment with a five sensor head with sensors positioned... ultrasonic Centennial, CO. equipment with a five sensor head with sensors positioned to perform all required...

75 FR 1058 - Formations of, Acquisitions by, and Mergers of Bank Holding Companies

Science.gov (United States)

2010-01-08

... byacquiring 100 percent of the voting shares of TBHC, Inc., and thereby indirectly acquire Centennial Bank, both in Centennial, Colorado. Board of Governors of the Federal Reserve System, January 5, 2010. Robert...

78 FR 24307 - Notice of Applications for Modification of Special Permits

Science.gov (United States)

2013-04-24

... to authorize Centennial, CO. 180.205. ultrasonic equipment with a five sensor head with sensors... Centennial, CO. 180.205. ultrasonic equipment with a five sensor head with sensors positioned to perform all...

They gave their names to science

National Research Council Canada - National Science Library

Halacy, D. S

1967-01-01

...: Ernst Mach and his number, Gergor Mendel and his laws, Christian Johann Doppler and his effect, Hans Geiger and his radiation counter, Nicholas Sadi Carnot and thermodynamics, Gustave, Gaspard de...

An abrupt centennial-scale drought event and mid-holocene climate change patterns in monsoon marginal zones of East Asia.

Directory of Open Access Journals (Sweden)

Yu Li

Full Text Available The mid-latitudes of East Asia are characterized by the interaction between the Asian summer monsoon and the westerly winds. Understanding long-term climate change in the marginal regions of the Asian monsoon is critical for understanding the millennial-scale interactions between the Asian monsoon and the westerly winds. Abrupt climate events are always associated with changes in large-scale circulation patterns; therefore, investigations into abrupt climate changes provide clues for responses of circulation patterns to extreme climate events. In this paper, we examined the time scale and mid-Holocene climatic background of an abrupt dry mid-Holocene event in the Shiyang River drainage basin in the northwest margin of the Asian monsoon. Mid-Holocene lacustrine records were collected from the middle reaches and the terminal lake of the basin. Using radiocarbon and OSL ages, a centennial-scale drought event, which is characterized by a sand layer in lacustrine sediments both from the middle and lower reaches of the basin, was absolutely dated between 8.0-7.0 cal kyr BP. Grain size data suggest an abrupt decline in lake level and a dry environment in the middle reaches of the basin during the dry interval. Previous studies have shown mid-Holocene drought events in other places of monsoon marginal zones; however, their chronologies are not strong enough to study the mechanism. According to the absolutely dated records, we proposed a new hypothesis that the mid-Holocene dry interval can be related to the weakening Asian summer monsoon and the relatively arid environment in arid Central Asia. Furthermore, abrupt dry climatic events are directly linked to the basin-wide effective moisture change in semi-arid and arid regions. Effective moisture is affected by basin-wide precipitation, evapotranspiration, lake surface evaporation and other geographical settings. As a result, the time scales of the dry interval could vary according to locations due to

78 FR 44122 - Agency Information Collection Activities; Submission for OMB Review; Comment Request

Science.gov (United States)

2013-07-23

... Bonnie McGregor, Federal Trade Investigator, Division of Advertising Practices, Bureau of Consumer... Regulatory Affairs, Office of Management and Budget, Attention: Desk Officer for the Federal Trade Commission...

Solar Cycle in the Heliosphere and Cosmic Rays

Science.gov (United States)

2014-10-23

at the source surface at 2.5 solar radii around the Sun. OMF shows a great variability both in solar cycle and on the centennial scale (see Fig. 3...It is important to note that the centennial variability is great (Lockwood et al. 1999; Solanki et al. 2000) comparable with or even greater than the...be identified as spikes in production of cosmogenic isotope (10Be and 14C) records on the centennial -millennial time scale (e.g., Usoskin and

Children's Bureau

Science.gov (United States)

... of adoptions, and strengthen foster care. Watch the Centennial Video News Views and Experiences of Low-Income ... Welfare Capacity Building Collaborative CB Express Children's Bureau Centennial Home About What We Do Our Organization History ...

AFB Directory of Services Listings

Science.gov (United States)

... radio-talking-book/index.jsp Minnesota STAR Program Centennial Office Building Room 358 658 Cedar Street St. ... and Human Services Nebraska State Office Building 301 Centennial Mall South Lincoln, NE 68508 http://www.adrcnebraska. ...

Arizona transportation history.

Science.gov (United States)

2011-12-01

The Arizona transportation history project was conceived in anticipation of Arizonas centennial, which will be : celebrated in 2012. Following approval of the Arizona Centennial Plan in 2007, the Arizona Department of : Transportation (ADOT) recog...

78 FR 29115 - North Pacific Fishery Management Council; Public Meetings; Correction

Science.gov (United States)

2013-05-17

... committees will hold public meetings, June 3-11, 2013 at the Centennial Hall, 101 Egan Drive, Juneau, AK... executive sessions. ADDRESSES: The Council meeting will be held at Centennial Hall, 101 Egan Drive, Juneau...

78 FR 27366 - North Pacific Fishery Management Council; Public Meetings

Science.gov (United States)

2013-05-10

... public meetings, June 3-11, 2013 at the Centennial Hall, 101 Egan Drive, Juneau, AK. DATES: The Council... sessions. ADDRESSES: The Council meeting will be held at Centennial Hall, 101 Egan Drive, Juneau, AK...

75 FR 17179 - Notice of Applications for Deregistration Under Section 8(f) of the Investment Company Act of 1940

Science.gov (United States)

2010-04-05

.... Applicant's Address: 6803 S. Tucson Way, Centennial, CO 80112. Philadelphia Fund, Inc. [File No. 811-505...: The application was filed on March 3, 2010. Applicant's Address: 6803 S. Tucson Way, Centennial, CO 80112. [[Page 17180

76 FR 35371 - Proposed Modification of the Las Vegas, NV, Class B Airspace Area; Public Meetings

Science.gov (United States)

2011-06-17

... October 10, 2011. ADDRESSES: (1) The meeting on Thursday, August 18, 2011, will be held at Centennial High School, 10200 Centennial Parkway, Las Vegas, NV 89149; (2) The meeting on Tuesday, August 23, 2011, will...

78 FR 36819 - Notice of Applications for Modification of Special Permit

Science.gov (United States)

2013-06-19

... the special Centennial, CO. 172.301(c), 180.205(f) permit to authorize and (g), and ultrasonic... special Centennial, CO. 172.302a(b)(2), (4) permit to authorize and (5), 180.205(f) ultrasonic equipment...

Climate Governance is Failing Us: We All Need to Respond

Directory of Open Access Journals (Sweden)

Chris Riedy

2011-12-01

Full Text Available Peer reviewed introduction to the Special Issue on Global Climate Change Policy: Post-Copenhagen Discord, guest edited by Chris Riedy and Ian M. McGregor, University of Technology, Sydney.

Fotod Peterburi tänavatelt / Gregor Taul

Index Scriptorium Estoniae

Taul, Gregor, 1986-

2011-01-01

Näitus "Tänapäeva Peterburi piktoralism" ning Frank Dituri ja Elio Cioli (Itaalia) näitus "Vaikuse tihedus" galeriis Rosfoto. Aleksei Tihhonovi seeria "Adaptsioon" Foto Department'is. Vladimir Antošenkovi näitus "Linn on tema inimesed" Dom Kinos. Olga Šonova näitus "Elukoht" ja näitleja Juri Gertsmani näitus "Arabeskid" Borei kunstikeskuses

The 1.5 meter solar telescope GREGOR

Czech Academy of Sciences Publication Activity Database

Schmidt, W.; von der Lühe, O.; Volkmer, R.; Denker, C.; Solanki, S.K.; Balthasar, H.; Bello González, N.; Berkefeld, T.; Collados Vera, M.; Fischer, A.; Halbgewachs, C.; Heidecke, F.; Hofmann, A.; Kneer, F.; Lagg, A.; Nicklas, H.; Popow, E.; Puschmann, K.G.; Schmidt, D.; Sigwarth, M.; Sobotka, Michal; Soltau, D.; Staude, J.; Strassmeier, K.G.; Waldmann, T.A.

2012-01-01

Roč. 333, č. 9 (2012), s. 796-809 ISSN 0004-6337 Institutional support: RVO:67985815 Keywords : high angular resolution * magnetic fields * telescopes Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 1.399, year: 2012

Monumental painting as public space / Gregor Taul

Index Scriptorium Estoniae

Taul, Gregor, 1986-

2012-01-01

Detsembris 2012 valminud NO99 teatri laemaalist, autor Tõnis Saadoja. Maali valmimist dokumenteerivast ja eesti monumentaalmaali ajalugu tutvustavast raamatust, fotograaf Paul Kuimet. Monumentaalmaali idee on taaselustatud ja peagi näeb, kas monumentaalmaal kui avalik kunst on võimalik kapitalistlikus Eestis

Why Johnny Won't Cooperate: An Examination of Behavior and Motivation Theory to Understand Resistance to Change in the Workplace

National Research Council Canada - National Science Library

1995-01-01

.... This thesis is advanced by synthesizing the motivation theories of Maslow, McGregor, and Merzberg to develop a model which describes behavior as a function of human need and points to the existence...

100 Years of Cotton Production, Harvesting and Ginning Systems Engineering: 1907 - 2007

Science.gov (United States)

The American Society of Agricultural and Biological Engineers (ASABE) celebrated its centennial year during 2007. As part of the ASABE centennial, the authors were asked to describe agricultural engineering accomplishments in U.S. cotton production, harvesting and ginning over the past 100 years. ...

R-ES-ONA--NCE

Indian Academy of Sciences (India)

Mendel's Laws oflnheritance, heredity was still a mystery to biologists, and ... of paternal and maternal influences, the segregation of parental types in ... Genes on X and Y chromosomes, or those on mitochondrial or chloroplast DNA, are.

History, Medicine, and Culture: History for Science Students.

Science.gov (United States)

Balog, C. Edward

1980-01-01

Describes college level history course entitled "Healers and Persons" for undergraduate medicine students. Topics include Greek medicine and Hippocrates, Galen of Pergamum, Islamic and Roman culture, medieval medicine, the Renaissance, Harvey, Pasteur, Lister, and Mendel. (KC)

Buchbesprechungen

OpenAIRE

2003-01-01

Die Besprechungen zu insgesamt 19 Publikationen (davon zwei mit direktem Hessen-Bezug) stammen von Ralf Hand, Beate Wolf, Karl Peter Buttler, Thomas Gregor, Sylvain Hodvina, Martin Wentzel, Andrea Fuchs, Detlef Mahn und Mathias Wolf.

Leadership through Shared Problem Solving.

Science.gov (United States)

Muccigrosso, Robert M.

1980-01-01

The author explains the particular relevance of participatory decision making for the Catholic school administrator, with reference to such organizational theories as McGregor's Theory Y and Maslow's hierarchy of human needs. (Author/SJL)

Centennial- to decadal-scale monsoon precipitation variations in the upper Hanjiang River region, China over the past 6650 years

Science.gov (United States)

Tan, Liangcheng; Cai, Yanjun; Cheng, Hai; Edwards, Lawrence R.; Gao, Yongli; Xu, Hai; Zhang, Haiwei; An, Zhisheng

2018-01-01

The upper Hanjiang River region is the recharge area of the middle route of South-to-North Water Transfer Project. The region is under construction of the Hanjiang-Weihe River Water Transfer Project in China. Monsoon precipitation variations in this region are critical to water resource and security of China. In this study, high-resolution monsoon precipitation variations were reconstructed in the upper Hanjiang River region over the past 6650 years from δ18O and δ13C records of four stalagmites in Xianglong cave. The long term increasing trend of stalagmite δ18O record since the middle Holocene is consistent with other speleothem records from monsoonal China. This trend follows the gradually decreasing Northern Hemisphere summer insolation, which indicates that solar insolation may control the orbital-scale East Asian summer monsoon (EASM) variations. Despite the declined EASM intensity since the middle Holocene, local precipitation may not have decreased remarkably, as revealed by the δ13C records. A series of centennial- to decadal-scale cyclicity was observed, with quasi-millennium-, quasi-century-, 57-, 36- and 22-year cycles by removing the long-term trend of stalagmite δ18O record. Increased monsoon precipitation during periods of 4390-3800 a BP, 3590-2960 a BP, 2050-1670 a BP and 1110-790 a BP had caused four super-floods in the upper reach of Hanjiang River. Dramatically dry climate existed in this region during the 5.0 ka and 2.8 ka events, coinciding with notable droughts in other regions of monsoonal China. Remarkably intensified and southward Westerly jet, together with weakened summer monsoon, may delay the onset of rainy seasons, resulting in synchronous decreasing of monsoon precipitation in China during the two events. During the 4.2 ka event and the Little Ice Age, the upper Hanjiang River region was wet, which was similar to the climate conditions in central and southern China, but was the opposite of drought observed in northern China. We

American Aerospace Power: Reinvigorating Our Adventurous Spirit

Science.gov (United States)

2015-02-03

1986), 45. 10 Ibid., 45-51. 11 Ibid., 122. 12 David H. Onkst, U.S. Centennial of Flight Commission, “Barnstormers,” http...A Call to the Future, July 2014. Site Content: Onkst, David H., U.S. Centennial of Flight Commission, “Barnstormers,” http

77 FR 22622 - AP Henderson Group, BPO Management Services, Inc., Capital Mineral Investors, Inc...

Science.gov (United States)

2012-04-16

... SECURITIES AND EXCHANGE COMMISSION [File No. 500-1] AP Henderson Group, BPO Management Services, Inc., Capital Mineral Investors, Inc., CardioVascular BioTherapeutics, Inc., and 1st Centennial... that there is a lack of current and accurate information concerning the securities of 1st Centennial...

Paremad filmid 3 : Moulin Rouge! / Jaanus Noormets

Index Scriptorium Estoniae

Noormets, Jaanus

2006-01-01

Muusikafilm "Moulin Rouge" : režissöör Baz Luhrmann : peaosades Nicole Kidman, Ewan McGregor : Ameerika Ühendriigid - Austraalia 2001. Lisatud nimekiri "25 paremat muusikali", mille koostas inglise telekanal Channel 4 2003.a.

Applying Mendelian rules in rapeseed (Brassica napus breeding

Directory of Open Access Journals (Sweden)

Marjanović-Jeromela Ana

2016-01-01

Full Text Available Rapeseed is one of the most important sources of edible oil, raw material for industry, as well as feed. The yield and quality of rapeseed have significantly been improved in recent decades as a result of intensive breeding and optimized production technology. The application of Mendel's rules in introducing monogenic traits has also contributed to success in rapeseed breeding. Rule 1, which refers to the uniformity of F1 generation, is now the basis of widespread development of rapeseed hybrids. Rule 2, dealing with genetic segregation in the F2 generation, is the basis for understanding the process of breeding lines. Rule 3, regarding the independent segregation of genes and traits, while exempting linked traits, is the basis of combining different desirable properties by selection. In the last few decades, the systematic use of Mendel's rules has contributed to the improvement of many properties of rapeseed, including tolerance to biotic and abiotic stress, yield and seed quality. Particular progress has been made in breeding for resistance to diseases, including the identification of molecular markers for marker-assisted selection. The next objective of rapeseed breeding is to create varieties with improved tolerance to environmental stress (e.g. frost, heat, and drought. Based on Mendel's rules, classical breeding methods and the latest developments in the field of molecular genetics and breeding, future progress is expected in the field of rapeseed breeding with an emphasis on polygenic, quantitative traits such as biomass, seed, and oil yield.

Fulltext PDF

Indian Academy of Sciences (India)

WILLIAM DEJONG-LAMBERT

2017-11-25

Nov 25, 2017 ... controversy, and highlights the motivations of its par- ticipants. ..... However, his sudden decision not to 'teach genetics' 'in the homeland of Mendel' ..... 33; thanks very much to Vidyanand Nanjundiah for making me aware of ...

Native Resistance through Art: A Contestation of History through Dialogue, Representation, and Action

Science.gov (United States)

Writer, Jeanette Haynes

2013-01-01

Beginning November 2006, and continuing through December 2007, Oklahomans were alerted to the promotions of the Oklahoma Centennial. For Indigenous Oklahomans, this was a problematic marking of a historical event. The Centennial's grand-narrative advanced a story privileging the "pioneers" who "settled the land" as the official…

Joubert Syndrome, A Ciliopathy

Directory of Open Access Journals (Sweden)

J Gordon Millichap

2013-10-01

Full Text Available Investigators at Neurogenetics Unit, Mendel Laboratory, Rome, and University of Salerno, Italy, review the clinical features and genetic basis of Joubert syndrome, overlap with other ciliopathies, and the multifaceted roles of primary cilia in CNS development.

Review on Chemical treatment of Industrial Waste Water * OPSAHU

African Journals Online (AJOL)

MICHAEL HORSFALL

water is used and lot of wastewater generated from industries due their processes and washing purpose. A large ..... for coagulation–precipitation of cosmetic wastewater industry (Aloui ..... Gregor, J.E., Nokes, C.J., Fenton, E., 1997. Optimising ...

Folate and long-chain polyunsaturated fatty acids in psychiatric disease

NARCIS (Netherlands)

Muskiet, Frits A. J.; Kemperman, Ramses F. J.

2006-01-01

Schizophrenia, autism and depression do not inherit by Mendel's law, and the search for a genetic basis seems unsuccessful. Schizophrenia and autism relate to low birth weight and pregnancy complications, which are associated with developmental adaptations by "programming". Epigenetics might

CASTLE BRAVO: Fifty Years of Legend and Lore. A Guide to Off-Site Radiation Exposures

Science.gov (United States)

2013-01-31

depressions , may grow rapidly from small beginnings—from small perturbations in a broad, unstable air stream—has led to the suggestion that the...Hygiene and Toxicology 25(7)253–274. ——. 1974. Paper presented in Radiology Centennial . Radiology Centennial , Inc., Reston, VA. Fehner, T. R., and F. G

Innovation gets to the bottom of Brazil's deepwater challenge; Lifting deepwater

Energy Technology Data Exchange (ETDEWEB)

2010-07-01

Cargotec makes access to Brazil's deep waters possible with innovative offshore technology such as MacGregor ultra-deepwater lifting system, which replaces heavy steel wire with multi-component fibre rope that weights nothing in water. (Author)

Kuldlõvi läks Veneetsias Saksa paviljonile / Harry Liivrand

Index Scriptorium Estoniae

Liivrand, Harry, 1961-

2001-01-01

49. Veneetsia biennaali peapreemia Kuldlõvi läks Saksa paviljonile, kus eksponeeritakse Gregor Schneideri environment'i nn. surnud maja teemal. Kuldlõvi elutöö eest anti Ameerika skulptorile Richard Serrale ning tema kaasmaalasele maalikunstnik Cy Twomblyle

The Centennial Essay.

Science.gov (United States)

Thurow, Lester

1991-01-01

The dean of MIT's Sloan School of Management, Lester Thurow, is a world-class economist and author of books advocating the need for a more competitive U.S. economy. The United States is the only industrial country lacking a postsecondary education system for noncollege bound students. In a world economy, student quality matters more than natural…

motivational needs assessment of extension agents of abia state

African Journals Online (AJOL)

p2333147

and Douglas McGregors' theory X and theory Y), on the extension agents were collected .... any need level but a reasonable amount of gratification of first priority ... creatively use their initiatives in manners that may suit the local farmers.

Pathway to a paradigm: the linear nonthreshold dose-response model in historical context. The American Academy of Health Physics 1995 Radiology Centennial Hartman Oration.

Science.gov (United States)

Kathren, R L

1996-05-01

This paper traces the evolution of the linear nonthreshold dose-response model and its acceptance as a paradigm in radiation protection practice and risk analysis. Deterministic effects such as skin burns and even deep tissue trauma were associated with excessive exposure to x rays shortly after their discovery, and carcinogenicity was observed as early as 1902. Still, it was not until 1925 that the first protective limits were suggested. For three decades these limits were based on the concept of a tolerance dose which, if not exceeded, would result in no demonstrable harm to the individual and implicitly assumed a threshold dose below which radiation effects would be absent. After World War II, largely because of genetic concerns related to atmospheric weapons testing, radiation protection dose limits were expressed in terms of a risk based maximum permissible dose which clearly implied no threshold. The 1927 discovery by Muller of x-ray induced genetic mutations in fruit flies, linear with dose and with no apparent threshold, was an important underpinning of the standards. The linear nonthreshold dose-response model was originally used to provide an upper limit estimate of the risk, with zero being the lower limit, of low level irradiation since the dose-response curve could not be determined at low dose levels. Evidence to the contrary such as hormesis and the classic studies of the radium dial painters notwithstanding, the linear nonthreshold model gained greater acceptance and in the centennial year of the discovery of x rays stands as a paradigm although serious questions are beginning to be raised regarding its general applicability. The work includes a brief digression describing the work of x-ray protection pioneer William Rollins and concludes with a recommendation for application of a de minimis dose level in radiation protection.

Inexorable spread: inexorable death? The fate of neo-XY ...

Indian Academy of Sciences (India)

2011-12-07

Dec 7, 2011 ... us since the earliest times of Mendelism and the chromo- some theory of heredity ... gotes and these may have reduced fertility due to meiotic seg- regation .... species of Drosophila, the rate of gene gain in the investi- gated Y ...

‘Shattered glass’: Assessing the influence of mass media on legitimacy and entrepreneurs’ adoption of new organizational practices

NARCIS (Netherlands)

Kuijpers, Johannes Cornelis; Ehrenhard, Michel Léon; Groen, Aard

2017-01-01

Legitimacy defined as a generalized assumption of desirability or appropriateness of an action or idea (Ashford & Gibbs, 1990; Suchman, 1995) is argued to play an important role in the maintenance and change of organizations and institutions (Scott, 2008; Scott, Ruef, Mendel, & Caronna, 2000).

„Parallel“ und „unabhängig“ – Erich von Tschermak-Seyseneggs Darstellung der „Wiederentdeckung“

Czech Academy of Sciences Publication Activity Database

Šimůnek, Michal V.; Hossfeld, U.; Mielewczik, M.

-, č. 413 (2017), s. 155-162 ISSN 0369-5034 Institutional support: RVO:68378114 Keywords : Mendel * genetics * history Subject RIV: AB - History OBOR OECD: History (history of science and technology to be 6.3, history of specific sciences to be under the respective headings)

Die „Wiederentdeckung“ der Mendelschen Gesetze im Kontext neuer Forschungen

Czech Academy of Sciences Publication Activity Database

Hossfeld, U.; Šimůnek, Michal V.; Mielewczik, M.

-, č. 413 (2017), s. 135-153 ISSN 0369-5034 Institutional support: RVO:68378114 Keywords : Mendel * genetics * history Subject RIV: AB - History OBOR OECD: History (history of science and technology to be 6.3, history of specific sciences to be under the respective headings)

Weldon's Search for a Direct Proof of Natural Selection and the ...

Indian Academy of Sciences (India)

Plants under Domestication in 1868, there was considerable dis- agreement about whether natural selection could indeed work the. Keywords. Evolution, struggle for existence, natural selection, type, variations, heredity, biometrics, Mendelism. way Darwin had suggested and be the driving engine of adap- tive evolution.

Fulltext PDF

Indian Academy of Sciences (India)

Madhu

” to the Brünn Natural. History Society in 1865 (Mendel 1866; for a translation of the paper, Stern and Sherwood 1966), but only .... not capable of fully explaining the difference between his clear-cut findings with peas and his less easi-.

Toil and Trouble: On the Materiality of Time

Directory of Open Access Journals (Sweden)

Ross Chambers

2014-03-01

Full Text Available This article explores the nature of temporality, entropy and negentropy, drawing contemporary fiction by Graham Swift and Fiona McGregor as well as the autobiography of Wikileaks founder Julian Assange, to ask questions about history, time and life.

“Digital Life Skills” for the young and mobile “Digital Citizens”

CSIR Research Space (South Africa)

Botha, Adèle

2008-10-01

Full Text Available fibre diameter analyser (OFDA). IWTO-47-95 Ilkley, Yorkshire, UK. McGregor, B.A., 2001. The Quality of cashmere and its influence on textile materials produced from cashmere and blends with superfine wool, PhD. , Sydney, Australia: University...

Atmospheric and Oceanic Response to Southern Ocean Deep Convection Oscillations on Decadal to Centennial Time Scales in Climate Models

Science.gov (United States)

Martin, T.; Reintges, A.; Park, W.; Latif, M.

2014-12-01

Many current coupled global climate models simulate open ocean deep convection in the Southern Ocean as a recurring event with time scales ranging from a few years to centennial (de Lavergne et al., 2014, Nat. Clim. Ch.). The only observation of such event, however, was the occurrence of the Weddell Polynya in the mid-1970s, an open water area of 350 000 km2 within the Antarctic sea ice in three consecutive winters. Both the wide range of modeled frequency of occurrence and the absence of deep convection in the Weddell Sea highlights the lack of understanding concerning the phenomenon. Nevertheless, simulations indicate that atmospheric and oceanic responses to the cessation of deep convection in the Southern Ocean include a strengthening of the low-level atmospheric circulation over the Southern Ocean (increasing SAM index) and a reduction in the export of Antarctic Bottom Water (AABW), potentially masking the regional effects of global warming (Latif et al., 2013, J. Clim.; Martin et al., 2014, Deep Sea Res. II). It is thus of great importance to enhance our understanding of Southern Ocean deep convection and clarify the associated time scales. In two multi-millennial simulations with the Kiel Climate Model (KCM, ECHAM5 T31 atmosphere & NEMO-LIM2 ~2˚ ocean) we showed that the deep convection is driven by strong oceanic warming at mid-depth periodically overriding the stabilizing effects of precipitation and ice melt (Martin et al., 2013, Clim. Dyn.). Sea ice thickness also affects location and duration of the deep convection. A new control simulation, in which, amongst others, the atmosphere grid resolution is changed to T42 (~2.8˚), yields a faster deep convection flip-flop with a period of 80-100 years and a weaker but still significant global climate response similar to CMIP5 simulations. While model physics seem to affect the time scale and intensity of the phenomenon, the driving mechanism is a rather robust feature. Finally, we compare the atmospheric and

Atlantic Meridional Overturning Circulation response to idealized external forcing

Energy Technology Data Exchange (ETDEWEB)

Park, W.; Latif, M. [Leibniz-Institut fuer Meereswissenschaften an der Universitaet Kiel, Kiel (Germany)

2012-10-15

The response of the Atlantic Meridional Overturning Circulation (AMOC) to idealized external (solar) forcing is studied in terms of the internal (unforced) AMOC modes with the Kiel Climate Model (KCM), a coupled atmosphere-ocean-sea ice general circulation model. The statistical investigation of KCM's internal AMOC variability obtained from a multi-millennial control run yields three distinct modes: a multi-decadal mode with a period of about 60 years, a quasi-centennial mode with a period of about 100 years and a multi-centennial mode with a period of about 300-400 years. Most variance is explained by the multi-centennial mode, and the least by the quasi-centennial mode. The solar constant varies sinusoidally with two different periods (100 and 60 years) in forced runs with KCM. The AMOC response to the external forcing is rather complex and nonlinear. It involves strong changes in the frequency structure of the variability. While the control run depicts multi-timescale behavior, the AMOC variability in the experiment with 100 year forcing period is channeled into a relatively narrow band centered near the forcing period. It is the quasi-centennial AMOC mode with a period of just under 100 years which is excited, although it is heavily damped in the control run. Thus, the quasi-centennial mode retains its period which does not correspond exactly to the forcing period. Surprisingly, the quasi-centennial mode is also most strongly excited when the forcing period is set to 60 years, the period of the multi-decadal mode which is rather prominent in the control run. It is largely the spatial structure of the forcing rather than its period that determines which of the three internal AMOC modes is excited. The results suggest that we need to understand the full modal structure of the internal AMOC variability in order to understand the circulation's response to external forcing. This could be a challenge for climate models: we cannot necessarily expect that the

Difficulties in Genetics Problem Solving.

Science.gov (United States)

Tolman, Richard R.

1982-01-01

Examined problem-solving strategies of 30 high school students as they solved genetics problems. Proposes a new sequence of teaching genetics based on results: meiosis, sex chromosomes, sex determination, sex-linked traits, monohybrid and dihybrid crosses (humans), codominance (humans), and Mendel's pea experiments. (JN)

Soomlased vallutavad Veneetsia / Maria-Kristiina Soomre

Index Scriptorium Estoniae

Soomre, Maria-Kristiina, 1978-

2001-01-01

Peakuraator Harald Szeemann valis Veneetsia biennaali põhiprogrammi seitse soome kunstnikku. Põhjamaade paviljonis esinevad soomlased Tommi Grönlund ja Petteri Nisunen, norralane Anders Tomren, rootslased Leif Elggren ja Carl-Michael Hauswolff. Suurbritanniat esindab Mark Wallinger, Belgiat Luc Tuymans, Saksamaad Gregor Schneider (Scneider?)

Advantages of Application of Electronic Commerce in Procurement for the Armed Forces of Brazil and South Korea

Science.gov (United States)

2001-12-01

Northern Europe.”, Ecommerce Times, [http://www.ecommercetimes.com/perl/story/3546.html], June 2001. Mc Gregor, Don, “Encryption”, [http...sans.org/infosecFAQ/ ecommerce /fraud.htm], September 2001. Schneider, Gary P. and James T. Perry, “Electronic Commerce”, Course Technology, 2001

Body weight and growth rate of South African Angora goat kids ...

African Journals Online (AJOL)

grethas

E-mail: grethasn@nda.agric.za. Introduction ... production has been investigated (McGregor, 1998), but very little work has been done on the effect of different ..... Grégoire, R.J., Fahmy, M.H., Boucher, J.M., Tremblay, A. & Mercier, J., 1996.

Align the Front End First.

Science.gov (United States)

Perry, Jim

1995-01-01

Discussion of management styles and front-end analysis focuses on a review of Douglas McGregor's theories. Topics include Theories X, Y, and Z; leadership skills; motivational needs of employees; intrinsic and extrinsic rewards; and faulty implementation of instructional systems design processes. (LRW)

Deelnemende bestuur as funksie van bestuurders se selfkonsep en mensbeskouing

Directory of Open Access Journals (Sweden)

W. P. Visser

1997-06-01

Opsomming Die literatuur toon 'n leemte aan navorsing betreffende individuele attribute wat 'n persoon tot deelnemende bestuur mag predisponeer. Met hierdie studie is ondersoek ingestel na die verband tussen twee suike attribute, naamlik selfkonsep en mensbeskouing enersyds, en gewilligheid tot deelnemende bestuur andersyds. 'n Instrument gebaseer op McGregor se teorie, is ontwikkel om mensbeskouing binne werkkonteks te meet. Met behulp van faktorontleding is twee faktore onttrek wat onderskeidelik intrinsieke en ekstrinsieke aspekte van 'n persoon se beskouing van ander se houding teenoor werk meet. 'n Gelykkansige steekproef uit 233 toesighouers van 'n openbare versorgingsonderneming het 196 bruikbare vraelyste opgelewer. 'n Beduidende verband tussen selfkonsep en mensbeskouing enersyds, en gewilligheid tot deelnemende bestuur andersyds, is met behulp van kanoniese korrelasie gevind (r =0,601; p < 0,01. Die bevinding bied steun vir McGregor se teorie dat 'n gunstige mensbeskouing tot 'n deelnemende bestuurstyl lei.

ALICE physicists receive 2014 Lise Meitner Prize

CERN Multimedia

Katarina Anthony

2014-01-01

On Wednesday, 3 September, four ALICE physicists were presented with the European Physical Society's 2014 Lise Meitner Prize for their outstanding contributions to nuclear physics (see here).   ALICE collaboration members Johanna Stachel (Heidelberg University, Germany), Peter Braun-Munzinger (GSI, Germany), Paolo Giubellino (INFN Turin, Italy, and CERN) and Jürgen Schukraft (CERN) were presented with their awards at a private ceremony held in the Globe of Science and Innovation. In addition to members of the ALICE collaboration, the ceremony was attended by members of the CERN Management including the Director-General, Rolf Heuer, as well as the EPS Nuclear Physics Board Chair, Douglas MacGregor, and the EPS Lise Meitner Prize Committee Chair, Victor Zamfir. For more information, please see "EPS honours CERN's heavy-ion researchers".  From left to right: Douglas MacGregor (EPS); Prize recipients Jürgen Schukraft,&a...

Decade to centennial resolution hydrogen isotopic record of climate change from southern New England for the past 16 kyr: proxy validation and multi-proxy comparisons

Science.gov (United States)

Huang, Y.; Gao, L.; Hou, J.; Shuman, B. N.; Oswald, W.; Foster, D.

2009-12-01

Open system lakes in New England offer excellent archives of precipitation isotopic ratios that yield quantitative paleoclimate information. We have demonstrated previously from a lake sediment transect that hydrogen isotopic ratios of a middle-chain length fatty acid, behenic acid (BA), faithfully record precipitation isotopic ratios. We hypothesized that mid-chain n-alkyl lipids in these small lakes were primarily derived from aquatic plants that record lake water isotopic ratios. To test this hypothesis, we conducted systematic and extensive sampling of both terrestrial and aquatic plants over the past two years at two typical kettle hole lakes, Blood Pond and Rocky Pond, MA, and used a linear algebra approach to delineate percentage inputs of aquatic and terrestrial plant contributions to mid-chain n-alkyl lipids. Our results demonstrate that >92 % of the mid-chain n-alkyl lipids is derived from submerged and floating aquatic macrophytes. Our new data provide a solid basis for the application of behenic hydrogen isotopic ratios as a paleoclimate proxy from small lakes. We will present a decadal to centennial scale 16 kyr record of BA hydrogen isotopic ratios from Blood Pond, and will discuss the results in light of published pollen and lake level data. Overall, our hydrogen isotopic record is fully consistent with regional climate scenarios, including the distinctive warming at B-A events, abrupt cooling at YD event, and transition from glacial to Holcoene climate conditions. However, our high-solution isotopic data provides important new insights concerning abrupt regional climate variability. We demonstrate that the New England climate is exceptionally senstive to AMOC changes and solar forcing and that many of the abrupt climate fluctuations exert major impacts on terrestrial ecosystems, hydrology and lake levels.

General Electric : Immelt surve all / Jena McGregor

Index Scriptorium Estoniae

McGregor, Jena

2008-01-01

Ettevõtte General Electric juht Jeffrey R. Immelt võitleb selle nimel, et taastada usaldus firma vastu, kuna laenukriis ja kehvad aktsiahinnad on tekitanud olukorra, kus investorid avaldavad suurt survet ettevõtte juhile. Lisa: GE kindralid

Centennial-scale human alterations, unintended natural-system responses, and event-driven mitigation within a coupled fluvial-coastal system: Lessons for collective management and long-term coastal change planning

Science.gov (United States)

Hein, C. J.; Hoagland, P.; Huang, J. C.; Canuel, E. A.; Fitzsimons, G.; Rosen, P.; Shi, W.; Fallon, A. R.; Shawler, J. L.

2017-12-01

On decadal to millennial timescales, human modifications of linked riparian and coastal landscapes have altered the natural transport of sediments to the coast, causing time-varying sediment fluxes to estuaries, wetlands, and beaches. This study explored the role of historical changes in land use and river/coastal engineering on patterns of coastal erosion in the coupled system comprising the Merrimack River and the Plum Island barrier beach (northern Massachusetts, USA). Recreational values of the beach, attendant impacts on the local housing market, human perceptions of future beach utilization, and collective management options were investigated. Key historical changes included the installation of dams to benefit industry and control flooding in the early 19th century; river-mouth jetties to maintain navigation and allow for the residential development of a more stable barrier in the early 20th century; and the progressive hardening of the shoreline in response to multi-decadal cyclical erosion and house losses throughout the latter 20th and 21st centuries. The tools of sedimentology, shoreline-change analysis, historic documentation, population surveys, and economic modeling were used to examine these changes and the dynamic linked responses of the natural system and human populations. We found cascading effects of human alterations to the river that changed sediment fluxes to the coastal zone, driving a need for mitigation over centennial timescales. More recently, multidecadal erosion-accretion cycles of the beach have had little impact on the housing market, which is instead more responsive to public shoreline stabilization efforts in response to short-term (sustainable management of coupled fluvial-coastal systems.

Centennial-scale vegetation dynamics and climate variability in SE Europe during Marine Isotope Stage 11 based on a pollen record from Lake Ohrid

Science.gov (United States)

Kousis, Ilias; Koutsodendris, Andreas; Peyron, Odile; Leicher, Niklas; Francke, Alexander; Wagner, Bernd; Giaccio, Biagio; Knipping, Maria; Pross, Jörg

2018-06-01

To better understand climate variability during Marine Isotope Stage (MIS) 11, we here present a new, centennial-scale-resolution pollen record from Lake Ohrid (Balkan Peninsula) derived from sediment cores retrieved during an International Continental Scientific Drilling Program (ICDP) campaign. Our palynological data, augmented by quantitative pollen-based climate reconstructions, provide insight into the vegetation dynamics and thus also climate variability in SE Europe during one of the best orbital analogues for the Holocene. Comparison of our palynological results with other proxy data from Lake Ohrid as well as with regional and global climate records shows that the vegetation in SE Europe responded sensitively both to long- and short-term climate change during MIS 11. The chronology of our palynological record is based on orbital tuning, and is further supported by the detection of a new tephra from the Vico volcano, central Italy, dated to 410 ± 2 ka. Our study indicates that MIS 11c (∼424-398 ka) was the warmest interval of MIS 11. The younger part of the interglacial (i.e., MIS 11b-11a; ∼398-367 ka) exhibits a gradual cooling trend passing over into MIS 10. It is characterized by considerable millennial-scale variability as inferred by six abrupt forest-contraction events. Interestingly, the first forest contraction occurred during full interglacial conditions of MIS 11c; this event lasted for ∼1.7 kyrs (406.2-404.5 ka) and was characterized by substantial reductions in winter temperature and annual precipitation. Most notably, it occurred ∼7 ka before the end of MIS 11c and ∼15 ka before the first strong ice-rafted debris event in the North Atlantic. Our findings suggest that millennial-scale climate variability during MIS 11 was established in Southern Europe already during MIS 11c, which is earlier than in the North Atlantic where it is registered only from MIS 11b onwards.

Correction to: The hidden therapist: evidence for a central role of music in psychedelic therapy.

Science.gov (United States)

Kaelen, Mendel; Giribaldi, Bruna; Raine, Jordan; Evans, Lisa; Timmermann, Christopher; Rodriguez, Natalie; Roseman, Leor; Feilding, Amanda; Nutt, David; Carhart-Harris, Robin

2018-05-01

The article The hidden therapist: evidence for a central role of music in psychedelic therapy, written by Mendel Kaelen, Bruna Giribaldi, Jordan Raine, Lisa Evans, Christopher Timmerman, Natalie Rodriguez, Leor Roseman, Amanda Feilding, David Nutt, Robin Carhart-Harris, was originally published electronically on the publisher's internet portal.

ЗТЦСЕЫДЗ ЛРШГХГ ЧЕГОЫТЦЧХ

African Journals Online (AJOL)

BIU

2014-07-09

Jul 9, 2014 ... density of Eucalyptus camaldulensis, E. saligna, and E. tereticornis grown in Coastal agro- ecological ... mechanical and fibre properties in order to arrive at plausible recommendations. Key Words: ... growth, die back and sometimes tree death. (Mendel et al. ... Soils are free draining, primarily sand, sandy.

THE FAILURE OF CHLOROFORM ADMINISTERED IN THE DRINKING WATER TO INDUCE RENAL TUBULAR CELL NEOPLASIA IN MALE F344/N RATS

Science.gov (United States)

The failure of chloroform administered in drinking water to induce renal tubular cell neoplasia in male F344/N rats Chloroform (TCM) has been demonstrated to be a renal carcinogen in the male Osborne-Mendel rat when administered either by corn oil gavage or in drin...

Genetics in Czechoslovakia (1935): An Edition

Czech Academy of Sciences Publication Activity Database

Šimůnek, Michal V.; Hossfeld, U.

2017-01-01

Roč. 53, 1/2 (2017), s. 23-30 ISSN 0085-0748 Institutional support: RVO:68378114 Keywords : Mendel * genetics * history Subject RIV: AB - History OBOR OECD: History (history of science and technology to be 6.3, history of specific sciences to be under the respective headings)

Turnover time of fluorescent dissolved organic matter in the dark global ocean

DEFF Research Database (Denmark)

Catalá, Teresa Serrano; Reche, Isabel; Fuentes-Lema, Antonio

2015-01-01

with a turnover time of 379±103 years is also detected. We propose the use of DOM fluorescence to study the cycling of resistant DOM that is preserved at centennial timescales and could represent a mechanism of carbon sequestration (humic-like fraction) and the decaying DOM injected into the dark global ocean......, where it decreases at centennial timescales (tyrosine-like fraction)...

Evidence of Suess solar-cycle bursts in Holocene speleothem d18O records

DEFF Research Database (Denmark)

Knudsen, Mads Faurschou; Jacobsen, B. H.; Riisager, Peter

2012-01-01

Several studies indicate that changes in solar activity may have driven Holocene subtropical monsoon variability on decadal and centennial timescales, but the strength and nature of this link remains debated. In this study, we combine a recent mapping of the Holocene solar-cycle activity with four...... in driving centennial-scale changes in the hydrological cycle in the subtropics during the Holocene....

Toward a Theory of Spacepower. Selected Essays

Science.gov (United States)

2011-01-01

then been followed by wars, economic depressions , or other occurrences, which slowed or stopped the trend toward globalization. Even in the first few...markets through cash prizes such as the Centennial Challenges competitions, as well as initiatives such as the COTS agreements.These government...promoting these new markets through the Centennial Challenges competitions and the Commercial Orbital Transportation Services agreements. At the same

Genetic Determinism in the Genetics Curriculum. An Exploratory Study of the Effects of Mendelian and Weldonian Emphases

Science.gov (United States)

Jamieson, Annie; Radick, Gregory

2017-12-01

Twenty-first-century biology rejects genetic determinism, yet an exaggerated view of the power of genes in the making of bodies and minds remains a problem. What accounts for such tenacity? This article reports an exploratory study suggesting that the common reliance on Mendelian examples and concepts at the start of teaching in basic genetics is an eliminable source of support for determinism. Undergraduate students who attended a standard `Mendelian approach' university course in introductory genetics on average showed no change in their determinist views about genes. By contrast, students who attended an alternative course which, inspired by the work of a critic of early Mendelism, W. F. R. Weldon (1860-1906), replaced an emphasis on Mendel's peas with an emphasis on developmental contexts and their role in bringing about phenotypic variability, were less determinist about genes by the end of teaching. Improvements in both the new Weldonian curriculum and the study design are in view for the future.

inflammatory drugs fail to enhance healing of acute hamstring

African Journals Online (AJOL)

r pylori e in. J 1993; n of. 96. ive as educing. 28-31. 85. cillin to ation of . MA. SAMJ ... Treatment produced a significant improvement in ..... Dry mouth .... McLatchie GA, Allister C, MacEwen C, Hamilton G, MacGregor H. Variable schedules.

Paleomagnetism and the alpine tectonics of Eurasia

NARCIS (Netherlands)

Raven, Th.

1964-01-01

The following paper by Gregor and Zijderveld is the first of a series planned to report results of paleomagnetic investigations in the Alpine area from Italy to the Himalayas. These investigations are carried out in close collaboration between the well-equipped paleomagnetic laboratory of

Quasi-stationary distributions for birth-death processes with killing

NARCIS (Netherlands)

Coolen-Schrijner, Pauline; van Doorn, Erik A.

2006-01-01

The Karlin-McGregor representation for the transition probabilities of a birth-death process with an absorbing bottom state involves a sequence of orthogonal polynomials and the corresponding measure. This representation can be generalized to a setting in which a transition to the absorbing state

Birth-death processes with killing : orthogonal polynomials and quasi-stationary distributions

NARCIS (Netherlands)

Coolen-Schrijner, Pauline; van Doorn, Erik A.

2005-01-01

The Karlin-McGregor representation for the transition probabilities of a birth-death process with an absorbing bottom state involves a sequence of orthogonal polynomials and the corresponding measure. This representation can be generalized to a setting in which a transition to the absorbing state

Big Five personality profiles of context-specific achievement goals

NARCIS (Netherlands)

McCabe, Kira O.; Van Yperen, Nico W.; Elliot, Andrew J.; Verbraak, Marc

2013-01-01

Over the past decade, an increasing body of literature supports the validity and utility of the 2 x 2 achievement goal framework (Elliot & McGregor, 2001). From this foundation, researchers have begun to investigate the complex antecedents and consequences underlying achievement goal pursuit. In the

Encuentros entre servicios de cirugía de hospitales centenarios en búsqueda de la historia y la tradición científica Meetings among the surgery services of centennial hospitals in search of history and scientific tradition

Directory of Open Access Journals (Sweden)

Orestes Noel Mederos Curbelo

2012-03-01

Full Text Available Los encuentros se realizan de forma anual. El primero se hizo en el Hospital Universitario "Manuel Fajardo", y cuenta en su organización con un colectivo de dirección, que tiene como prioridad la confraternización de los cirujanos y el rescate de la tradición y la historia de la especialidad, para mantener la tradición entre los hospitales y servicios de cirugía centenarios, así como recordar acontecimientos y figuras históricas en la búsqueda de la historia y la tradición científica. El propósito de estos encuentros es homenajear a los profesores con resultados científicos en la docencia médica, motivar el desarrollo de profesionales jóvenes y el reconocimiento a las personalidades históricas fallecidas. Se han efectuado cinco encuentros, entre los que se incluyen cuatro (de conocimientos entre residentes. Se han realizado reconocimientos a veinticuatro profesores, y se dedicaron los cuatro últimos encuentros de conocimientos a distinguidos profesores fallecidos, en los últimos años. Están integrados cinco hospitales: "Comandante Manuel Fajardo", "General Calixto García", "Dr. Salvador Allende", "Dr. Miguel Enríquez" y "10 de Octubre". Los encuentros entre servicios de cirugía de hospitales centenarios han constituido una fuente de búsqueda de la historia y de reconocimiento al esfuerzo de nuestros profesores.The meetings have an annual base. The first one was in the "Manuel Fajardo" University Hospital and in its organization they have a management group prior whose priority is the brotherhood among the surgeons and the rescue of tradition and history of the specialty, to maintain the tradition among the hospitals and the centennial surgery services, as well as to remember events and historical personalities in the search of the history and the scientific tradition.The purpose of these meetings is to pay tribute to the professors with scientific results in the medical teaching, to motivate the development of young

Higher-Order Chromatin Organisation in Cell Nuclei: Structure and Function

Czech Academy of Sciences Publication Activity Database

Kozubek, Stanislav; Lukášová, Emilie; Bártová, Eva; Kozubek, Michal; Skalníková, M.; Jirsová, Pavla; Koutná, I.

2000-01-01

Roč. 17, - (2000), s. 1145 ISSN 0739-1102. [Mendel - Brno 2000. DNA Structure and Interactions. Their Biological Roles and Implications in Biomedicine and Biotechnologies. 19.07.2000-23.07.2000, Brno] Institutional research plan: CEZ:A17/98:Z5-004-9-ii Subject RIV: BO - Biophysics

The Allusion of the Gene: Misunderstandings of the Concepts Heredity and Gene

Science.gov (United States)

Falk, Raphael

2014-01-01

Life sciences became Biology, a formal scientific discipline, at the turn of the nineteenth century, when it adopted the methods of reductive physics and chemistry. Mendel's hypothesis of inheritance of discrete factors further introduced a quantitative reductionist dimension into biology. In 1910 Johannsen differentiated between the…

PÖFFi eelsoojendus on tehtud / Margit Adorf

Index Scriptorium Estoniae

Adorf, Margit, 1974-

2006-01-01

PÖFFi laste- ja noortefilmide festivali "Just Film" filmides: "Me saame sellest üle" (rezh. Niels Arden Oplev, Taani 2006), "Tommy põrgu" (rezh. Ove Raymond Gyldenas, Norra), "Pilv" (rezh. Gregor Schnitzler, Saksamaa 2006) ja dokumemtaalfilmist "Kurikuulus". Lisatud nimekiri "Just Film'il" linastunud filmidest põhiprogrammis

Advanced Bridge Capacity and Structural Integrity Assessment Methodology

Science.gov (United States)

2013-03-01

bility, or fatigue , are automatically satisfied. However, MacGregor and Wight (2005) point out that this is not necessarily the case, and note the...are quartz and Rochelle salt. Synthetic, artificially polarized ceramics such as lead zir- conate titanate ( PZT ) are commonly used in these sensors

General of the Army George C. Marshall’s Strategic Leadership

Science.gov (United States)

2017-03-15

Depression to perform conservation tasks in rural areas.31 In 1938, Marshall moved to the War Plans Division of the General Staff. Unbeknownst to...125 US Army Center of Military History, “Omar Nelson Bradley: The Centennial ,” US Army, 2006...Omar Nelson Bradley: The Centennial .” US Army, 2006. Accessed April 2, 2017. http://www.history.army.mil/brochures/bradley/bradley.htm. Watson

Fort Leavenworth Ethics Symposium: Exploring the Professional Military Ethic Held in Fort Leavenworth, Kansas on November 15-17, 2010

Science.gov (United States)

2010-11-01

lished in 1847.4 That document, in turn, descends from the Hippocratic Oath. Likewise, the American Bar Association recently published a centennial ...Responsibility, Model Rules of Professional Conduct: Centennial Edition, April 2008. 6. The following brief history derives from an understanding of hundreds...people, or in- creases job satisfaction, when present versus what depresses motivation, or decreases job satisfac- tion, when missing. The relevance to

Theory X/Y in the Health Care Setting: Employee Perceptions, Attitudes, and Behaviors.

Science.gov (United States)

Prottas, David J; Nummelin, Mary Rogers

Douglas McGregor's conceptualization of Theory X and Theory Y has influenced management practices for almost six decades, despite the relative paucity of empirical support. This empirical study examined the relationships between health care employees' perceptions of (1) manager Theory Y and Theory X orientations; (2) work unit psychological safety, organizational citizenship behavior, and service quality; and (3) the employing entity. The study used survey data from more than 3500 employees of a large US health care system and analyzed them using confirmatory factor and hierarchical regression analyses. Results indicate that McGregor's conceptualization is best considered as two separate constructs-Theory Y and Theory X-rather than as one-dimensional X/Y construct. This study's three dependent variables were positively related to Theory Y and negatively related to Theory X, with larger Theory Y effect sizes. Psychological safety partially mediated the relationship between Theory Y and the dependent variables Y. Practical implications are presented.

Tvorba mobilní aplikace pro správu reklamací a závad

OpenAIRE

Hanáková, Eliška

2015-01-01

Hanáková, E. Creating a mobile application for managing complaints and defects. Bachelor thesis. In Brno: Mendel University, 2015. This thesis deals with the creation of application for operational system Android. Application is created for managing reclamations and faults which can appear in several projects like buildings projects.

successful occipitocervical fusion for basilar invagination in a rural ...

African Journals Online (AJOL)

His X-rays, CT scans and MRI revealed basilar invagination (8.5mm ... McRae. Opisthion. McGregor. Hard palate. Chamberlain. DISCUSSION. Although congenital, basilar invagination can remain asymptomatic and unrecognized until adulthood (1). ... the reducible type; this is similar to Goel et al's (3) patients, 82% of ...

Just a suburban boy

Directory of Open Access Journals (Sweden)

Lindsay Barrett

2013-10-01

Full Text Available A review of Craig McGregor's Australian Son: Inside Mark Latham (Pluto Press, North Melbourne, 2004, Margaret Simons's Quarterly Essay: Latham’s World: The New Politics of the Outsiders (Black Inc., Melbourne, 2004 and Michael Duffy's Latham and Abbott (Random House Australia, Milson’s Point, 2004.

Desire as response to experience

DEFF Research Database (Denmark)

Thøgersen, Ulla

2009-01-01

. The first part of the paper presents and critically discusses the answers given by need gratification theory (Maslow, McClelland, McGregor) and by learning theories placed within the field of workplace learning or organizational learning (Senge, Argyris et Schön, Wenger) and it opens up the ambition...

An orthogonal-polynomial approach to first-hitting times of birth-death processes

NARCIS (Netherlands)

van Doorn, Erik A.

In a recent paper [J. Theor. Probab. 25 (2012) 950-980] Gong, Mao and Zhang, using the theory of Dirichlet forms, extended Karlin and McGregor's classical results on first-hitting times of a birth-death process on the nonnegative integers by establishing a representation for the Laplace transform

Spectral properties of birth-death polynomials

NARCIS (Netherlands)

van Doorn, Erik A.

2015-01-01

We consider sequences of polynomials that are defined by a three-terms recurrence relation and orthogonal with respect to a positive measure on the nonnegative axis. By a famous result of Karlin and McGregor such sequences are instrumental in the analysis of birth-death processes. Inspired by

Spectral properties of birth-death polynomials

NARCIS (Netherlands)

van Doorn, Erik A.

We consider sequences of polynomials that are defined by a three-terms recurrence relation and orthogonal with respect to a positive measure on the nonnegative axis. By a famous result of Karlin and McGregor such sequences are instrumental in the analysis of birth-death processes. Inspired by

RMSRo

DEFF Research Database (Denmark)

Nielsen, S.B.; Clausen, O.R.; McGregor, Eoin David

2014-01-01

Geophysical Research Abstracts Vol. 16, EGU2014-12484, 2014 EGU General Assembly 2014 © Author(s) 2014. CC Attribution 3.0 License. RMSRo: A vitrinite reflectance model consistent with the temperature-apatite fission track system Søren B. Nielsen, Ole R. Clausen, and Eoin D. McGregor Department...

The Forgotten Airman - Major General Oliver P. Echols and How He Won WWII

Science.gov (United States)

2012-06-01

Interwar US Army Aviation and the Air Corps Tactical School, 211. 63 Boyd L. Dastrup, The US Army Command and General Staff College: A Centennial ...Army Command and General Staff College: A Centennial History (Manhattan, KS: Sunflower University Press, 1982), 86. During Echols’ time at CGSS, the...a Depression -era work relief program established under President Franklin D. Roosevelt’s New Deal to provide employment to young unmarried men

European Research and Development in Hybrid Flexible Electronics

Science.gov (United States)

2010-07-01

meetings in late 2008. WTEC then recruited a panel of U.S. experts, chaired by Ananth Dodabalapur, the Ashley H. Priddy Centennial Professor in...Engineering, The University of Texas at Austin Ananth Dodabalapur is the Ashley H. Priddy Centennial Professor in Engineering at the University of Texas...output from the East Asian countries has inevitably depressed the world share of U.S. and European papers (except for Spain); India, however, has

Subsurface Assessment at McMurdo Station, Antarctica

Science.gov (United States)

2017-02-01

Support Contract 7400 S. Tucson Way Centennial , CO 08112 Final Report Approved for public release; distribution is unlimited. Prepared for...on this rough bedrock surface; that is, fill was used to fill depressions between bedrock outcrops. Fill thickness tends to be greater towards the...First Hundred Years, ed. G.A. Kiersch, 277–298. Geological Society of America, Centennial Special Vol. 3. Boulder, CO: Geological Society of America

A New Order of Things: Hap Arnold’s Approach to Airpower Innovation 1907-1938

Science.gov (United States)

2014-05-22

Centennial Appraisal (London: Bookcraft Bath, 1994), 16-24. 24Jack M. Ivy, “The Paradoxical Paradigm: Aviation Leadership, 1918-1926: How William Moffett... Depression .26 However, there was more to it than resource constraints. Although the Army was beginning to entertain ideas of an expanded mission for...General Staff College: A Centennial History (Manhattan, KS: Sunflower University Press, 1982), 70-72. 137Perret, Winged Victory, 25. 44 Infantry

American Naval Thinking in the Post-Cold War Era: The U.S. Navy and the Emergence of a Maritime Strategy, 1989-2007

Science.gov (United States)

2013-06-01

reoccurrence of global depression and world war by establishing regimes soon after the Second World War that addressed the factors that were thought to have...Princeton, NJ: Princeton University, 1986), 164. 8 John B. Hattendorf, John R. Wadleigh, and B. Mitchell Simpson, Sailors and Scholars: The Centennial ...Simpson. Sailors and Scholars: The Centennial History of the United States Naval War College. Newport, RI: U.S. Naval War College, 1984. 387

Middle Eastern Geographies of World War I

Science.gov (United States)

2010-05-21

and ill-equipped forces. Within this atmosphere of persecution and economic depression caused by the war’s stoppage of religious pilgrimages...St. J.B. Armitage, "T.E. Lawrence: a centennial lecture," Asian Affairs 20, no. 1 (1989): 14. This Turkish offensive severely threatened the...British invade Syria. The Arabs working from Akaba became virtually the 163 St. J.B. Armitage, “Lawrence: a centennial lecture,” 18. 164 Wavell

The Abongo Abroad: Military Internationalism, Travel, Training, and Peace in Ghana and the United States, 1960-1992

Science.gov (United States)

2014-05-01

Festus B. Aboagye, The Ghana Army: A Concise Contemporary Guide to Its Centennial Regimental History, 1897-1999 (Accra: Sedco, 1999), 119; S. Kojo...corruption in the military and the country’s depressed economy.” 132 Although the report noted that Rawlings’ AFRC had executed eight top leaders...v. 40. Rochester, NY: University of Rochester Press, 2009. Aboagye, Festus B. The Ghana Army: A Concise Contemporary Guide to Its Centennial

Coastal Modelling Environment version 1.0: a framework for integrating landform-specific component models in order to simulate decadal to centennial morphological changes on complex coasts

Directory of Open Access Journals (Sweden)

A. Payo

2017-07-01

Full Text Available The ability to model morphological changes on complex, multi-landform coasts over decadal to centennial timescales is essential for sustainable coastal management worldwide. One approach involves coupling of landform-specific simulation models (e.g. cliffs, beaches, dunes and estuaries that have been independently developed. An alternative, novel approach explored in this paper is to capture the essential characteristics of the landform-specific models using a common spatial representation within an appropriate software framework. This avoid the problems that result from the model-coupling approach due to between-model differences in the conceptualizations of geometries, volumes and locations of sediment. In the proposed framework, the Coastal Modelling Environment (CoastalME, change in coastal morphology is represented by means of dynamically linked raster and geometrical objects. A grid of raster cells provides the data structure for representing quasi-3-D spatial heterogeneity and sediment conservation. Other geometrical objects (lines, areas and volumes that are consistent with, and derived from, the raster structure represent a library of coastal elements (e.g. shoreline, beach profiles and estuary volumes as required by different landform-specific models. As a proof-of-concept, we illustrate the capabilities of an initial version of CoastalME by integrating a cliff–beach model and two wave propagation approaches. We verify that CoastalME can reproduce behaviours of the component landform-specific models. Additionally, the integration of these component models within the CoastalME framework reveals behaviours that emerge from the interaction of landforms, which have not previously been captured, such as the influence of the regional bathymetry on the local alongshore sediment-transport gradient and the effect on coastal change on an undefended coastal segment and on sediment bypassing of coastal structures.

Orthogonal polynomials on $R^+$ and birth-death processes with killing

NARCIS (Netherlands)

Coolen-Schrijner, Pauline; Coolen-Schrijner, Pauline; van Doorn, Erik A.; Elaydi, S.; Cushing, J.; Lasser, R.; Ruffing, A.; Papageorgiou, V.; Van Assche, W.

2007-01-01

The purpose of this paper is to extend some results of Karlin and McGregor's and Chihara's concerning the three-terms recurrence relation for polynomials orthogonal with respect to a measure on the nonnegative real axis. Our findings are relevant for the analysis of a type of Markov chains known as

Impact of Mcgregor's X and Y Motivation Theory on the Job ...

African Journals Online (AJOL)

This study investigated the impact of McGregor's X and Y motivation theory in the job performance of staff in Ebonyi State University, Abakaliki. The design was a descriptive survey. The population was 2632 and a sample of 100 was randomly selected. Two research questions were formulated to guide the study.

Motivation of Teachers. ACSA School Management Digest, Series 1, Number 18. ERIC/CEM Research Analysis Series, Number 46.

Science.gov (United States)

Thompson, Sydney

This publication discusses intrinsic teacher motivation by reviewing human resources literature and making use of educational literature and interviews with working educators. First it provides sketches of the work motivation theories of McGregor, Maslow, Herzberg, and Deci. Next, the paper examines the work and problems of teachers. Finally, it…

Birth-death processes with killing

NARCIS (Netherlands)

van Doorn, Erik A.; Zeifman, A.I.

2004-01-01

The purpose of this note is to point out that Karlin and McGregor's integral representation for the transition probabilities of a birth-death process on a semi-infinite lattice with an absorbing bottom state remains valid if one allows the possibility of absorption into the bottom state from any

Birth-death processes with killing

NARCIS (Netherlands)

van Doorn, Erik A.; Zeifman, Alexander I.

2005-01-01

The purpose of this note is to point out that Karlin and McGregor's integral representation for the transition probabilities of a birth-death process on a semi-infinite lattice with an absorbing bottom state remains valid if one allows the possibility of absorption into the bottom state from any

Euroopa filmiakadeemia staar jättis Tallinnasse jälje / Andres Laasik

Index Scriptorium Estoniae

Laasik, Andres, 1960-2016

2010-01-01

Euroopa Filmiakadeemia poolt antava elutööauhinna saanud šveitsi näitleja Bruno Ganzi kohtumisest Solarise kinos vaatajatega. Nimekiri: Euroopa filmiauhinnad 2010. Euroopa film 2010 - "Variautor", režissöör - Roman Polanski ("Variautor"), naisnäitleja - Sylvie Testud ("Lourdes"), meesnäitleja - Ewan McGregor ("Variautor")

Spiritual Leadership: How Does the Spirit Move You?

Science.gov (United States)

1992-06-05

our state of hunger . An Egyptian found in a field was taken before King David, who instructed that he be fed before questioning so that his spirit would...personality. A professor of neuropsychology at the 86 James MacGregor Burns, Leadership New York: Harper Colophon Books, Harper and Row Publishers

A case study of the crack sizing performance of the Ultrasonic Phased Array combined crack and wall loss inspection tool on the Centennial pipeline, the defect evaluation, including the defect evaluation, field feature verification and tool performance validation (performed by Marathon Oil, DNV and GE Oil and Gas)

Energy Technology Data Exchange (ETDEWEB)

Hrncir, T.; Turner, S. [Marathon Pipe Line LLC, Findley, OH (United States); Polasik, SJ [DNV Columbus, Inc, Dublin, OH 43017 (United States); Vieth, P. [BP EandP, Houston, TX (United States); Allen, D.; Lachtchouk, I.; Senf, P.; Foreman, G. [GE Oil and Gas PII Pipeline Solutions, Stutensee (Germany)], email: geoff.foreman@ge.com

2010-07-01

The Centennial Pipeline System is operated by Marathon Pipe Line LLC. It is 754 miles long and carries liquid products from eastern Texas to southern Illinois. Most of it was constructed in 1951 for natural gas, but it was converted in 2001 for liquid product service. GE Oil and Gas conducted an ultrasonic phased array in-line inspection (ILI) survey of this pipeline, whose primary purpose was to detect and characterize stress corrosion cracking. A dig verification was performed in 2008 to increase the level of confidence in the detection and depth-sizing capabilities of this inspection method. This paper outlines of the USCD technology and experience and describes how the ILI survey results were validated, how the ILI data analysis was improved, and the impact on managing the integrity of the line section. Results indicate that the phased array technology approached a 90% certainty predicted depth with a tolerance of 1 mm at a 95% confidence level.

Effect of the Civil-Military Relationship on the Philippine-American War

Science.gov (United States)

2016-08-04

centennial /benevolent.html. 32 It is still unclear whether the Americans or the Filipinos shot first, with each side blaming the other after...his political career was over. He fell into a state of depression and wrote to his friend, William H. Taft, that he began to make plans to attend...Benevolent Assimilation Proclamation,” December 21, 1898. Accessed on December 21, 2015. http://www.msc.edu.ph/ centennial /benevolent.html. 51 ___. State

Pershing in Mexico: a case study in limited contingency operations

Science.gov (United States)

2016-05-26

34Benevolent Assimilation Proclamation," December 21 , 1898, accessed on December 21 , 2015 http: //www.msc.edu.ph/ centennial /benevolent.html. 32 It is still...assignments, tasks, or responsibilities from the President, Roosevelt believed his political career was over. He fell into a state of depression and wrote...www.msc.edu.ph/ centennial /benevolent.html. 50 . State of the Union Address, December 5, 1899. Accessed on December 5, 2015 http://www.presidency.ucsb.edu/ws

Understanding the Role of Typhoons, Fire, and Climate on the Vegetation Dynamics of Tropical Dry Forests: Looking to the Past to Develop Future Management Solutions

Science.gov (United States)

2010-04-01

centennial -to millennial scale typhoon reconstructions from the western North Pacific are far more limited. Historical government documents of typhoon... Centennial scale swings from humid to drought conditions have been documented in some tropical locations (Hodell et al., 2001). By looking to the past... depressions with a maximum depth of roughly 12 meters. The lagoon hollows are bounded by sand flats and coral reefs (Fig. 2). Core VC9 was located in the

Officer Professional Development for Service in Multinational Organizations

Science.gov (United States)

2012-05-17

NY: Penguin Books, 1984), 61–2. 56 Dwight David Eisenhower: The Centennial (Washington D.C.: Center for Military History, 1986), 20. 57 Ibid. 17...perhaps depressed is the better word — by the folly, futility and waste of war as a means of resolving man’s problems.”116 Case Study Results...Dwight David Eisenhower: The Centennial . Washington D.C.: Center for Military History, 1986. 42 Edwards, Paul M. General Matthew B. Ridgway: An

Toyama Kametaro and Vernon Kellogg: silkworm inheritance experiments in Japan, Siam, and the United States, 1900-1912.

Science.gov (United States)

Onaga, Lisa

2010-01-01

Japanese agricultural scientist Toyama Kametaro's report about the Mendelian inheritance of silkworm cocoon color in Studies on the Hybridology of Insects (1906) spurred changes in Japanese silk production and thrust Toyama and his work into a scholarly exchange with American entomologist Vernon Kellogg. Toyama's work, based on research conducted in Japan and Siam, came under international scrutiny at a time when analyses of inheritance flourished after the "rediscovery" of Mendel's laws of heredity in 1900. The hybrid silkworm studies in Asia attracted the attention of Kellogg, who was concerned with how experimental biology would be used to study the causes of natural selection. He challenged Toyama's conclusions that Mendelism alone could explain the inheritance patterns of silkworm characters such as cocoon color because they had been subject to hundreds of years of artificial selection, or breeding. This examination of the intersection of Japanese sericulture and American entomology probes how practical differences in scientific interests, societal responsibilities, and silkworm materiality were negotiated throughout the processes of legitimating Mendelian genetics on opposite sides of the Pacific. The ways in which Toyama and Kellogg assigned importance to certain silkworm properties show how conflicting intellectual orientations arose in studies of the same organism. Contestation about Mendelism took place not just on a theoretical level, but the debate was fashioned through each scientist's rationale about the categorization of silkworm breeds and races and what counted as "natural". This further mediated the acceptability of the silkworm not as an experimental organism, but as an appropriately "natural" insect with which to demonstrate laws of inheritance. All these shed light on the challenges that came along with the use of agricultural animals to convincingly articulate new biological principles.

R-ES-ONANCE--I -Novem-be-r

Indian Academy of Sciences (India)

itself with heredity, the single most characteristic feature of the living world. Also ... They tried to see whether, by combining Mendel's laws with the. Darwinian ... The question of senescence or growing old is quite different from the ... females, which have two. .... Price was that the best thing for an individual to do when it.

Erdős centennial

CERN Document Server

Ruzsa, Imre; Sós, Vera; Pálvölgyi, Dömötör

2013-01-01

Paul Erdös was one of the most influential mathematicians of the twentieth century, whose work in number theory, combinatorics, set theory, analysis, and other branches of mathematics has determined the development of large areas of these fields. In 1999, a conference was organized to survey his work, his contributions to mathematics, and the far-reaching impact of his work on many branches of mathematics. On the 100th anniversary of his birth, this volume undertakes the almost impossible task to describe the ways in which problems raised by him and topics initiated by him (indeed, whole branches of mathematics) continue to flourish. Written by outstanding researchers in these areas, these papers include extensive surveys of classical results as well as of new developments.

Fred Hoyle's birth centennial

Science.gov (United States)

Mitton, Simon

2015-12-01

Simon Mitton summarizes the RAS Specialist Discussion Meeting that examined from a historical perspective Hoyle's remarkable career and the impact of his science, in the first of two articles on his scientific legacy.

Matter-wave bright solitons in effective bichromatic lattice potentials

Indian Academy of Sciences (India)

2013-08-01

Aug 1, 2013 ... M Theis, G Thalhammer, K Winkler, M Hellwig, G Ruff, R Grimm and J H Denschlag, Phys. Rev. Lett. 93, 123001 (2004). [11] Gregor Thalhammer, Matthias Theis, Klaus Winkler, Rudolf Grimm and Johannes Hecker. Denschlag, Phys. Rev. A 71, 033403 (2005). [12] H Sakaguchi and B A Malomed, Phys.

Veneetsia kuldlõvid jagatud

Index Scriptorium Estoniae

2001-01-01

Veneetsia biennaali Kuldlõvid elutöö eest - Richard Serra ja Cy Twombly. Paviljoni preemia läks Saksa paviljonile ja Gregor Schneiderile ruumisimulatsiooni eest. Eriauhinnad: Janet Cardiff, George Bures Miller, Marisa Merz, Pierre Huyghe. Premeeritud noored kunstnikud (4), esiletõstetud kunstnikud (4) jm. Ene-Liis Semperi ja Marko Laimre väljapanekust.

Reconstruction of Last Glacial to early Holocene monsoon variability from relict lake sediments of the Higher Central Himalaya, Uttrakhand, India

DEFF Research Database (Denmark)

Juyal, N.; Pant, R.K.; Basavaiah, N.

2009-01-01

.5 ka and after14.5–13 ka. The Last Glacial phase ended with the deposition of outwash gravel dated at 11 ka indicating glacial retreat and the onset of Holocene condition. Additionally, centennial scale fluctuations between 16.5 ka and 12.7 ka in the magnetic and geochemical data are seen. A close...... instability in higher northern latitudes. However, centennial scale abrupt changes are attributed to the result of albedo changes on the Himalaya and Tibetan plateau....

Making the National Security Council Better In the Bahamas to Resolve Illegal Migration

Science.gov (United States)

2015-12-01

states fell to Union forces that blockade running ceased in the islands.62 The islands experienced a severe economic depression at the end of the...Geographies and Caribbean Nationalism: At the Border Between ‘A Dying Colonialism’ and U.S. Hegemony,” New Centennial Review 3, no. 3 (fall 2003... Centennial Review 3, no. 3 (fall 2003), 151–174. 71 Defence Act (The Bahamas). Section 4. http://laws.bahamas.gov.bs/cms/images /LEGISLATION/PRINCIPAL

Writing to Think: The Intellectual Journey of a Naval Career

Science.gov (United States)

2014-02-01

a new system of alliances and economic structures to avoid another Great Depression and to inoculate as much of the world as possible against the...POPULAR IN NAVAL AVIATION As we approach 2011, the centennial year of aviation in the U.S. Navy, the jet engine and jet-powered aircraft have become...put into fast, gas-guzzling jets. It was a lethal combination. As the centennial of naval aviation approaches, it is interesting to observe that it has

Sea-Based X-Band (SBX) Radar Vessel Maintenance and Repair. Draft Environmental Assessment

Science.gov (United States)

2011-02-14

little vegetation, and nearby fishing waters are used for nesting. California least tern nests are simple depressions in the substrate either lined or...Park Centennial Park Coronado Hospital Sharp Coronado Hospital Crown School Bay View Park Cruise Ship Terminal S a n D i e g o B a y Naval Air...Village Glorietta School Triangle Park Palm Park SDG and E Park Centennial Park Coronado Hospital Sharp Coronado Hospital Crown School Bay View Park Cruise

Wright-Patterson Air Force Base: The First Century

Science.gov (United States)

2015-01-01

aside in 1934 to house a Transient Camp for temporary workers employed under Depression -era programs. During 1934 and 1935, these men labored on...The 445th Airlift Wing upgraded from C-141s to C-5As between 2005 and 2007, before transitioning to C-17s in 2012. The Centennial of Flight was a...December 2002 on Wright Brothers Hill. The event initiated the nation’s commemoration of the Centennial of Flight. These actions symbolized the

Projections of uncertainties in climate change scenarios into expected winter wheat yields

Czech Academy of Sciences Publication Activity Database

Trnka, M.; Dubrovský, Martin; Semerádová, Daniela; Žalud, Z.

2004-01-01

Roč. 77, - (2004), s. 229-249 ISSN 0177-798X R&D Projects: GA ČR GA521/02/0827 Grant - others:Mendel University of Agriculture and Forestry Brno(CZ) J 08/98:432100001 Institutional research plan: CEZ:AV0Z3042911 Keywords : climate change scenarios * wheat yields Subject RIV: GC - Agronomy Impact factor: 0.964, year: 2004

Využití nástrojů internetového marketingu v e-shopu

OpenAIRE

Hašková, Gabriela

2015-01-01

Hašková, G., Trenz, O., Using internet marketing tools in the online shop. Diploma thesis. Brno: Mendel University, 2015. This diploma thesis deals with internet marketing and practical using internet marketing tools. It includes keyword analysis, PPC advertising, e-mailing and Facebook marketing. The aim of this thesis is increasing sales of the specific online shop.

Person-Centered Management in Project Administration.

Science.gov (United States)

Caraway, James E.

The theories of several contemporary management theorists are examined in order to demonstrate that their administrative stance is that of a person-intensive approach to management. After exploring leadership theory and the positions of Douglas McGregor, John J. Morse, Jay W. Lorsch, Rensis Likert, Bernard M. Bass, William Reddin, George H. Rice,…

The DEDS: DSTO’s Environmental-Data Server for Research Applications

Science.gov (United States)

2013-07-01

AccuWeather.com, 2010. Available from: http:// www.accuweather.com/ [cited 15 June 2010]. 44. National Oceanic and Atmospheric Administration, /data/gfs- avn ...hi. Available from: http://nomads.ncdc.noaa.gov/data/gfs- avn -hi/ [cited 15 June 2010]. 45. Wang, Y., L.R. Leung, J.L. McGregor, D.-K. Lee, W.-C

carnivora: protelidae

African Journals Online (AJOL)

north of Sa da Bandeira, Angola (at about 140. SO' Sjl3° 35' E). The skin and skull were deposited in the Alexander McGregor Memorial Museum. Kimberley, Cape (Collectors No. 276a). The stomach contents of this specimen are detailed in. Table I. The habitat where the specimen was obtained was degraded ...

Final Progress Report submitted via the DOE Energy Link (E-Link) in June 2009 [Collaborative Research: Decadal-to-Centennial Climate & Climate Change Studies with Enhanced Variable and Uniform Resolution GCMs Using Advanced Numerical Techniques

Energy Technology Data Exchange (ETDEWEB)

Fox-Rabinovitz, Michael S. [Univ. of Quebec (Canada); Cote, Jean [Univ. of Quebec (Canada)

2009-10-09

The joint U.S-Canadian project has been devoted to: (a) decadal climate studies using developed state-of-the-art GCMs (General Circulation Models) with enhanced variable and uniform resolution; (b) development and implementation of advanced numerical techniques; (c) research in parallel computing and associated numerical methods; (d) atmospheric chemistry experiments related to climate issues; (e) validation of regional climate modeling strategies for nested- and stretched-grid models. The variable-resolution stretched-grid (SG) GCMs produce accurate and cost-efficient regional climate simulations with mesoscale resolution. The advantage of the stretched grid approach is that it allows us to preserve the high quality of both global and regional circulations while providing consistent interactions between global and regional scales and phenomena. The major accomplishment for the project has been the successful international SGMIP-1 and SGMIP-2 (Stretched-Grid Model Intercomparison Project, phase-1 and phase-2) based on this research developments and activities. The SGMIP provides unique high-resolution regional and global multi-model ensembles beneficial for regional climate modeling and broader modeling community. The U.S SGMIP simulations have been produced using SciDAC ORNL supercomputers. The results of the successful SGMIP multi-model ensemble simulations of the U.S. climate are available at the SGMIP web site (http://essic.umd.edu/~foxrab/sgmip.html) and through the link to the WMO/WCRP/WGNE web site: http://collaboration.cmc.ec.gc.ca/science/wgne. Collaborations with other international participants M. Deque (Meteo-France) and J. McGregor (CSIRO, Australia) and their centers and groups have been beneficial for the strong joint effort, especially for the SGMIP activities. The WMO/WCRP/WGNE endorsed the SGMIP activities in 2004-2008. This project reflects a trend in the modeling and broader communities to move towards regional and sub-regional assessments and

Theories for the winds from Wolf Rayet stars

International Nuclear Information System (INIS)

Cassinelli, J.P.

1982-01-01

The massive and fast winds of Wolf Rayet stars present a serious momentum problem for the line-driven wind theories that are commonly used to explain the fast winds of early type stars. It is perhaps possible for the winds to be driven by lines, if multiple scattering occurs and if there are a sufficient number of lines in the spectrum so that large fraction of the continuum is blocked by line opacity in the winds. Several other mechanisms are discussed, in particular two that rely on strong magnetic fields: a) Alfven wave driven wind models like those recently developed by Hartmann and MacGregor for late type supergiants and b) the ''Fast Magnetic Rotator'' model that was developed by Belcher and MacGregor for the winds from pre-main sequence stars. In either model, large magnetic fields (approximately equal to 10 4 gauss) are required to drive the massive and fast winds of Wolf Rayet stars. Smaller fields might be possible if the multiple scattering line radiation force can be relied on to provide a final acceleration to terminal velocity. (Auth.)

Vegetation history inferred from pollen in Late Quaternary faecal deposits (hyraceum) in the Cape winter-rain region, and its bearing on past climates in South Africa

CSIR Research Space (South Africa)

Scott, L

2007-01-01

Full Text Available blocks of hyrax dung, where detailed enough, show marked variation at a millennial to centennial scale. Over the whole sequence, the most prominent change in pollen composition occurs just after 16 ka when a sudden decline of fynbos elements in favour... in the region is more complex than previously suggested in the usual generalizations. Sharp variations of similar scale to those found in the LGM also characterize the climatic evolution throughout the Holo- cene. We assume that regular marked centennial...

Cognitive Mechanisms of Insight: The Role of Heuristics and Representational Change in Solving the Eight-Coin Problem

Science.gov (United States)

Öllinger, Michael; Jones, Gary; Faber, Amory H.; Knoblich, Günther

2013-01-01

The 8-coin insight problem requires the problem solver to move 2 coins so that each coin touches exactly 3 others. Ormerod, MacGregor, and Chronicle (2002) explained differences in task performance across different versions of the 8-coin problem using the availability of particular moves in a 2-dimensional search space. We explored 2 further…

Training for Retrieval of Knowledge under Stress through Algorithmic Decomposition

Science.gov (United States)

1986-10-01

o1 Disussion of part A .............. 2 PART B: Training 4or overcoming the Biase-Rate Fallacy Introduction...22 PART B: Training for overcoming the Base-Rate Fallacy Introduction ........ .................... 23 Experiment III ......................... 28...Light Bulb and Dyslexia problems used by Lichtenstein & MacGregor (1985). The problems are presented in Appendix D. All aspects of the problems were

Two Sides of the Same Coin: Leadership.

Science.gov (United States)

Berg, Steven; Burns, James MacGregor; McKay, Ritchie

2002-01-01

This article presents a transcript of Steven Berg's interviews with James MacGregor Burns and Ritchie McKay regarding leadership. James Burns is a senior fellow in the Jepson School of Leadership Studies at the University of Richmond, Virginia. Ritchie McKay is Head Coach of the men's basketball team at University of New Mexico. Steven Berg is an…

Düsseldorfi koolkond ja selle Baltimaade kunstnikud - kultuuridevahelise suhtluse aspekte / Bettina Baumgärtel

Index Scriptorium Estoniae

Baumgärtel, Bettina

2008-01-01

Düsseldofi koolkonnast (1819-1918), selle rahvusvahelisest levikust, Eestist pärit baltisaksa kunstnike Karl Eduard von Gebhardti (1838-1925), Eugéne Gustav Dückeri (1841-1916) ja Alexander Heinrich Gregor von Bochmanni (1850-1930) juhtivast osast ning nende erinevatest maadest, ka eestlastest õpilastest. Ka valitsevatest maalizhanritest ja tolleaegsetest rühmitustest Saksamaal - natsareenlastest ja ühendusest Malkasten

Potenciál rozvoje vzdělávacího cestovního ruchu v České republice

OpenAIRE

Kalimullina, Elvira

2015-01-01

Kalimullina, E. Potential for development of educational tourism in the Czech Republic. Bachelor thesis. Brno: Mendel University, 2015. Bachelor thesis deals with the issues of educational tourism in Czech Republic. The aim of the work is to assess the state and perspectives for development of educational tourism in the country and search for ways that will lead to growth of the industry.

Schopnosti překladačů programovacího jazyka Python

OpenAIRE

Pala, Ondřej

2015-01-01

PALA, Ondřej. Ability of compilers programming language Python. Brno, 2015. Diploma thesis. Mendel university in Brno. Diploma thesis rate ability of selected compilers programming language Python. First path of thesis is focused to programming language Python and principle of working compilers. Second path is focused to creating testing tasks, defining eva-luation criterias of compilers and testing compilers without testing tasks.

Cd translocation into generative organs of linseed (Linum usitatissimum L.)

Energy Technology Data Exchange (ETDEWEB)

Becher, M.; Woerner, A.; Schubert, S. [Giessen Univ. (Germany). Inst. fuer Pflanzenernaehrung

1997-12-31

Linseed is able to accumulate considerably high concentrations of Cd in generative organs, the dietary critical value of 0.3 {mu}g Cd/g seed often being exceeded. Differences between genotypes of linseed in this respect, however, have been observed but the underlying mechanisms responsible for these differences are unknown. The aim of the present work was to identify these mechanisms by studying the Cd accumulation of the linseed genotypes Antares and McGregor which differ in their ability to accumulate Cd in the seeds. Cultivar Antares is a high and cv. McGregor is low Cd accumulator which was confirmed in a pot experiment. It was found that the differences between these genotypes were Cd-specific and were caused neither by single seed weight nor by Cd translocation into the shoot. The distribution pattern of Cd within mature capsules between the pericarp and the seeds differed from that of Ca which was used as a phloem-immobile reference ion. From these results we conclude that Cd was translocated from the pericarp into the seeds via the phloem. This conclusion was supported by direct Cd determination in collected phloem sap from linseed stems. As sources of seed-Cd we identified the pericarps of capsules and the leaves. The genotype differences concerning the Cd concentrations in the seeds may be explained in terms of differences in phloem translocation of Cd. (orig.) [Deutsch] Oellein vermag Cd in betraechtlichen Konzentrationen in den Samen zu akkumulieren. Aus diesem Grund wird der Grenzwert fuer Diaetlein von 0,3 {mu}g/g Samen im Anbau haeufig ueberschritten. Es gibt jedoch genotypische Unterschiede, deren zugrundeliegende Mechanismen nicht bekannt sind. Das Ziel der vorliegenden Arbeit bestand darin, diese Mechanismen an den Oelleinsorten Antares und McGregor zu untersuchen. Antares akkumuliert grosse, McGregor hingegen geringe Mengen Cd in den Samen. Diese Beobachtungen konnten in einem Gefaessversuch bestaetigt werden. Es wurde gezeigt, dass die

The Novarupta-Katmai eruption of 1912 - largest eruption of the twentieth century; centennial perspectives

Science.gov (United States)

Hildreth, Wes; Fierstein, Judy

2012-01-01

The explosive outburst at Novarupta (Alaska) in June 1912 was the 20th century's most voluminous volcanic eruption. Marking its centennial, we illustrate and document the complex eruptive sequence, which was long misattributed to nearby Mount Katmai, and how its deposits have provided key insights about volcanic and magmatic processes. It was one of the few historical eruptions to produce a collapsed caldera, voluminous high-silica rhyolite, wide compositional zonation (51-78 percent SiO2), banded pumice, welded tuff, and an aerosol/dust veil that depressed global temperature measurably. It emplaced a series of ash flows that filled what became the Valley of Ten Thousand Smokes, sustaining high-temperature metal-transporting fumaroles for a decade. Three explosive episodes spanned ~60 hours, depositing ~17 km3 of fallout and 11±2 km3 of ignimbrite, together representing ~13.5 km3 of zoned magma. No observers were nearby and no aircraft were in Alaska, and so the eruption narrative was assembled from scattered villages and ship reports. Because volcanology was in its infancy and the early investigations (1915-23) were conducted under arduous expeditionary conditions, many provocative misapprehensions attended reports based on those studies. Fieldwork at Katmai was not resumed until 1953, but, since then, global advances in physical volcanology and chemical petrology have gone hand in hand with studies of the 1912 deposits, clarifying the sequence of events and processes and turning the eruption into one of the best studied in the world. To provide perspective on this century-long evolution, we describe the geologic and geographic setting of the eruption - in a remote, sparsely inhabited wilderness; we review the cultural and scientific contexts at the time of the eruption and early expeditions; and we compile a chronology of the many Katmai investigations since 1912. Products of the eruption are described in detail, including eight layers of regionwide fallout

Genetics and plant development.

Science.gov (United States)

Prunet, Nathanaël; Meyerowitz, Elliot M

2016-01-01

There are only three grand theories in biology: the theory of the cell, the theory of the gene, and the theory of evolution. Two of these, the cell and gene theories, originated in the study of plants, with the third resulting in part from botanical considerations as well. Mendel's elucidation of the rules of inheritance was a result of his experiments on peas. The rediscovery of Mendel's work in 1900 was by the botanists de Vries, Correns, and Tschermak. It was only in subsequent years that animals were also shown to have segregation of genetic elements in the exact same manner as had been shown in plants. The story of developmental biology is different - while the development of plants has long been studied, the experimental and genetic approaches to developmental mechanism were developed via experiments on animals, and the importance of genes in development (e.g., Waddington, 1940) and their use for understanding developmental mechanisms came to botanical science much later - as late as the 1980s. Copyright © 2016 Académie des sciences. Published by Elsevier SAS. All rights reserved.

Analysis of ESG indicators for measuring enterprise performance

Directory of Open Access Journals (Sweden)

Zuzana Chvátalová

2013-01-01

Full Text Available In this article authors focus on the analysis of the whole set of environmental, social and corporate governance (ESG indicators for the elimination of double or triple effects within the next construction of methods for measuring corporate performance. They build on their previously published results (in Acta univ. agric. et silvic. Mendel. Brun., 2012. The partial actual selected results of a recently undertaken currently project entitled ‘Construction of Methods for Multifactorial Assessment of Company Complex Performance in Selected Sectors’ were used. This project was solved the research teams of the Faculty of Business and Management of Brno University Technology and Faculty of Business and Economics of Mendel University in Brno since 2011. Further theoretical resources in the environmental, social and corporate governance area, known indicator databases (namely Global Reporting Initiative, comparative analysis, resp. syntheses for identifying possible of common indicator properties were identified to classify indicator subsets to preclude double or even triple effect based on mathematical set theory (Venn diagrams. The indicator analysis in constructed multi-factorial methods contributes to precise decision making in management to improve corporate performance.

PREMIM and EMIM: tools for estimation of maternal, imprinting and interaction effects using multinomial modelling

Directory of Open Access Journals (Sweden)

Howey Richard

2012-06-01

Full Text Available Abstract Background Here we present two new computer tools, PREMIM and EMIM, for the estimation of parental and child genetic effects, based on genotype data from a variety of different child-parent configurations. PREMIM allows the extraction of child-parent genotype data from standard-format pedigree data files, while EMIM uses the extracted genotype data to perform subsequent statistical analysis. The use of genotype data from the parents as well as from the child in question allows the estimation of complex genetic effects such as maternal genotype effects, maternal-foetal interactions and parent-of-origin (imprinting effects. These effects are estimated by EMIM, incorporating chosen assumptions such as Hardy-Weinberg equilibrium or exchangeability of parental matings as required. Results In application to simulated data, we show that the inference provided by EMIM is essentially equivalent to that provided by alternative (competing software packages such as MENDEL and LEM. However, PREMIM and EMIM (used in combination considerably outperform MENDEL and LEM in terms of speed and ease of execution. Conclusions Together, EMIM and PREMIM provide easy-to-use command-line tools for the analysis of pedigree data, giving unbiased estimates of parental and child genotype relative risks.

Science beyond boundary: are premature discoveries things of the past?

Science.gov (United States)

Singh, Rama S

2016-06-01

Mendel's name more than of any other draws our attention to the personal side in terms of success and failure in science. Mendel lived 19 years after presenting his research findings and died without receiving any recognition for his work. Are premature discoveries things of the past, you may ask? I review the material basis of science in terms of science boundary and field accessibility and analyze the possibility of premature discoveries in different fields of science such as, for example, physics and biology. I conclude that science has reached a stage where progress is being made mostly by pushing the boundary of the known from inside than by leaping across boundaries. As more researchers become engaged in science, and as more publications become open access, on-line, and interactive, the probability of an important discovery remaining buried and going unrecognized would become exceedingly small. Of course, as examples from physics show, a new theory or an important idea can always lie low, unrecognized until it becomes re-discovered and popularized by other researchers. Thus, premature discoveries will become less likely but not forbidden.

Assessing the Development of Cross-Cultural Competence in Soldiers

Science.gov (United States)

2010-11-01

Klein, 1997). Specifically, Cognitive Task Analysis protocols were used in interviews with both subject matter experts and potential end user...populations. Critical incidents elicited were enhanced via Critical Decision Method and Knowledge Audit protocols (Klein, Calderwood & MacGregor, 1989...Total inability to assess cultural encounters *Willing to interact with counterparts *Very slow to “pick up on etiquette issues” *Need

Teaching Theory X and Theory Y in Organizational Communication

Science.gov (United States)

Noland, Carey

2014-01-01

The purpose of the activity described here is to integrate McGregor's Theory X and Theory Y into a group application: design a syllabus that embodies either Theory X or Theory Y tenets. Students should be able to differentiate between Theory X and Theory Y, create a syllabus based on Theory X or Theory Y tenets, evaluate the different syllabi…

Fórum. Centenário de Josué de Castro: lições do passado, reflexões para o futuro. Introdução Forum. Centennial of the birth of Josué de Castro: lessons from the past, reflections for the future. Introduction

Directory of Open Access Journals (Sweden)

Malaquias Batista Filho

2008-11-01

Full Text Available O artigo apresenta as principais contribuições de Josué de Castro, no ano comemorativo de seu centenário (1908/ 2008, como pensador, pesquisador e homem público dedicado à luta contra a fome no Brasil e no mundo. Ressalta a visão holística do problema, suas raízes históricas e suas perspectivas de solução, tendo como referencial o desenvolvimento humano em bases econômicas, sociais e ecológicas sustentáveis e num processo de natureza co-participativa. Suas lições do passado podem e devem ser incluídas na agenda mais atual das grandes questões da humanidade.This article presents the main contributions by Josué de Castro (1908-1973, coinciding with the centennial of the birth of this outstanding thinker, researcher, and public figure dedicated to the struggle against hunger in Brazil and the world. His holistic view of the problem is highlighted, along with its historical roots and respective solutions. The reference is human development with a sustainable economic, social, and ecological basis and participatory process. Lessons from the past can and should be included on the current agenda of major issues faced by humankind.

Webová aplikácia pre inzerciu realít

OpenAIRE

Konečný, Zdenko

2015-01-01

Konečný, Z. Web application for property advertising. Bachelor theses Brno: Mendel University in Brno, 2015. This Bachelor theses is focused on design and implementation of web appli-cation for property advertising according to Norwes Technologies Ltd. require-ments and is divided into literature, methodic part, which explains basic concepts and specific requirements, analysis, modeling and implementation part, which de-scribes process of system formation.

Studying Scientific Discovery by Computer Simulation.

Science.gov (United States)

1983-03-30

Mendel’s laws of inheritance, the law of Gay- Lussac for gaseous reactions, tile law of Dulong and Petit, the derivation of atomic weights by Avogadro...neceseary mid identify by block number) scientific discovery -ittri sic properties physical laws extensive terms data-driven heuristics intensive...terms theory-driven heuristics conservation laws 20. ABSTRACT (Continue on revere. side It necessary and identify by block number) Scientific discovery

Daňové aspekty využívání zaměstnaneckých výhod

OpenAIRE

Frey, Frederik

2015-01-01

Tax aspects of employee benefits. Bachelor thesis. Brno: Mendel University, 2015. Bachelor thesis deals with employee benefits in a selected company. The aim of the work is to create a new reward system for employees in the company. Employee benefits are considered from the point of their impact on the corporate tax base and on total personal income tax base of employee as well.

Structure and Stability of Cytidine Adlayers on Au (III), Carbon Electodes with thin Film of Mercury (MFE) and Hg Electrode

Czech Academy of Sciences Publication Activity Database

Hasoň, S.; Vetterl, Vladimír

2000-01-01

Roč. 17, - (2000), s. 1137-1138 ISSN 0739-1102. [Mendel - Brno 2000. DNA Structure and Interactions. Their Biological Roles and Implications in Biomedicine and Biotechnologies. 19.07.2000-23.07.2000, Brno] R&D Projects: GA AV ČR IAA4004002; GA ČR GV204/97/K084 Institutional research plan: CEZ:A17/98:Z5-004-9-ii Subject RIV: BO - Biophysics

Kodu kui kunstiprojekt = Home as an Art Project / David Crowley

Index Scriptorium Estoniae

Crowley, David

2004-01-01

Londonis avatud saksa kunstniku Gregor Schneideri installatsioonist "Die Familie Schneider" ja tema projektist "Dead House UR" tema kodulinnas Rheydtis. Inglise kunstniku Michael Landy (sünd. 1963) 2001. a. Londoni endises C&A kaubamajas korraldatud kunstisündmusest "Breakdown", mille käigus M. Landy laskis kõik oma 7227 isiklikku eset teatraalsel tehaseliinil hävitada, ja tema installatsioonist "Semi-detached" Tate Britainis. 5 ill

Experimentation Using the Mir Station as a Space Laboratory

Science.gov (United States)

1998-01-01

Institute for Machine Building (TsNIIMASH) Korolev, Moscow Region, Russia V. Teslenko and N. Shvets Energia Space Corporation Korolev, Moscow...N. Shvets Energia Space Corporation Korolev, Moscow Region, Russia J. A. Drakes/ D. G. Swann, and W. K. McGregor* Sverdrup Technology, Inc...and plume computations. Excitation of the plume gas molecular electronic states by solar radiation, geo- corona Lyman-alpha, and electronic impact

Routh's algorithm - A centennial survey

Science.gov (United States)

Barnett, S.; Siljak, D. D.

1977-01-01

One hundred years have passed since the publication of Routh's fundamental work on determining the stability of constant linear systems. The paper presents an outline of the algorithm and considers such aspects of it as the distribution of zeros and applications of it that relate to the greatest common divisor, the abscissa of stability, continued fractions, canonical forms, the nonnegativity of polynomials and polynomial matrices, the absolute stability, optimality and passivity of dynamic systems, and the stability of two-dimensional circuits.

A centennial gift from Einstein

Science.gov (United States)

Oswalt, T. D.

2017-06-01

The 1919 detection of the apparent displacement of background stars near the edge of the eclipsed Sun's disk provided one of the first convincing proofs of Einstein's theory of general relativity (1, 2). Almost 100 years later, Sahu et al. report on page 1046 of this issue the first measurement of the gravitational deflection of starlight by a star other than the Sun (3). Using the superior angular resolution of the Hubble Space Telescope (HST), they measured shifts in the apparent position of a distant background star as a nearby dense stellar remnant called a white dwarf passed almost in front of it in 2014. Because of the relative distances involved, the deflections they observed were about 1000 times smaller than those seen in 1919, but also in agreement with general relativity theory.

Setting Sights on Our Centennial.

Science.gov (United States)

Heller, George N.

1982-01-01

Considers changes in the Music Educators National Conference (MENC) and American music education in the next 25 years. The author speculates about MENC's future leaders, geographical influences on the organization, the proliferation of special-interest groups, tensions between music performance and general education goals, and economic and…

Liberty Centennial Student Campaign Manual.

Science.gov (United States)

Statue of Liberty-Ellis Island Foundation, New York, NY.

Background readings and project ideas to involve elementary and secondary school students in fundraising for the restoration of the Statue of Liberty are provided. Materials can be divided into two sections. The first section, background readings, contains President Ronald Reagan's opening remarks at the ceremony introducing the Statue of…

El Paso County Geothermal Project at Fort Bliss. Final Project Report

Energy Technology Data Exchange (ETDEWEB)

Lear, Jon [Ruby Mountain Inc., Salt Lake City, UT (United State); Bennett, Carlon [Ruby Mountain Inc., Salt Lake City, UT (United State); Lear, Dan [Ruby Mountain Inc., Salt Lake City, UT (United State); Jones, Phil L. [Ruby Mountain Inc., Salt Lake City, UT (United State); Burdge, Mark [Evergreen Clean Energy Management, Provo, UT (United States); Barker, Ben [Evergreen Clean Energy Management, Provo, UT (United States); Segall, Marylin [Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.; Moore, Joseph [Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.; Nash, Gregory [Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.; Jones, Clay [Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.; Simmons, Stuart [Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.; Taylor, Nancy [Univ. of Utah, Salt Lake City, UT (United States). Energy and Geoscience Inst.

2016-02-01

The El Paso County Geothermal Project at Fort Bliss was an effort to determine the scale and scope of geothermal resources previously identified on Fort Bliss’ McGregor Range in southern Otero County, New Mexico. The project was funded with a $5,000,000 grant to El Paso County from the U.S. Department of Energy (DOE) as part of the American Recovery and Reinvestment Act of 2009 and a $4,812,500 match provided by private sector partners. The project was administered through the DOE Golden Field Office to awardee El Paso County. The primary subcontractor to El Paso County and project Principal Investigator - Ruby Mountain Inc. (RMI) of Salt Lake City, Utah - assembled the project team consisting of Evergreen Clean Energy Management (ECEM) of Provo, Utah, and the Energy & Geoscience Institute at the University of Utah (EGI) in Salt Lake City, UT to complete the final phases of the project. The project formally began in May of 2010 and consisted of two preliminary phases of data collection and evaluation which culminated in the identification of a drilling site for a Resource Confirmation Well on McGregor Range. Well RMI 56-5 was drilled May and June 2013 to a depth of 3,030 ft. below ground level. A string of slotted 7 inch casing was set in 8.75 inch hole on bottom fill at 3,017 ft. to complete the well. The well was drilled using a technique called flooded reverse circulation, which is most common in mineral exploration. This technique produced an exceptionally large and complete cuttings record. An exciting development at the conclusion of drilling was the suspected discovery of a formation that has proven to be of exceptionally high permeability in three desalinization wells six miles to the south. Following drilling and preliminary testing and analysis, the project team has determined that the McGregor Range thermal anomaly is large and can probably support development in the tens of megawatts.

Unforced Climate Transactions as a Scenario for Dansgaard-Oeschger Events

DEFF Research Database (Denmark)

Kleppin, Hannah

phases correspond to dominant El Niño-like conditions, increased variance of ENSO and a displacement of El Niños (La Niñas) farther to the east (west). This ENSO-like mode is correlated with sea-level pressure anomalies over the Labrador Sea. ENSO-like variability with said characteristics on centennial...... scales is also present in a different pre-industrial control simulation. The absence of Greenland climate transitions in this simulation suggest that the centennial scale climate variability presented here, originates in the tropics. In the southern hemisphere the only significant changes in association...

CCR 20th Anniversary Commentary: Determining a Pharmacokinetic/Pharmacodynamic Relationship for Sunitinib—A Look Back.

Science.gov (United States)

Mendel, Dirk B; Cherrington, Julie M; Laird, A Douglas

2015-06-01

The article by Mendel and colleagues, published in the January 1, 2003, issue of Clinical Cancer Research, described their novel preclinical approach to developing a thorough understanding of the exposure-activity relationship for sunitinib, a multitargeted receptor tyrosine kinase inhibitor being developed for oncology therapy. This work successfully set exposure guidelines to identify a biologically active dose in early clinical trials. ©2015 American Association for Cancer Research.

Studium korelací jakostních parametrů vín a destilátů

OpenAIRE

Veverka, Lukáš

2012-01-01

PhD dissertation thesis "Study of correlation of quality parameters of wines and wine distillates" was done at Department of Post-Harvest Technology of Horticultural Products, Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno during 2006 - 2012. Samples of wines and samples of distillates made from these wines were analysed using liquid-liquid extraction method (LLE) followed by gas chromatography analysis (GC). Potential characteristics -- chemical markers were d...

Noble gas composition of subcontinental lithospheric mantle: An extensively degassed reservoir beneath Southern Patagonia

Science.gov (United States)

Jalowitzki, Tiago; Sumino, Hirochika; Conceição, Rommulo V.; Orihashi, Yuji; Nagao, Keisuke; Bertotto, Gustavo W.; Balbinot, Eduardo; Schilling, Manuel E.; Gervasoni, Fernanda

2016-09-01

Patagonia, in the Southern Andes, is one of the few locations where interactions between the oceanic and continental lithosphere can be studied due to subduction of an active spreading ridge beneath the continent. In order to characterize the noble gas composition of Patagonian subcontinental lithospheric mantle (SCLM), we present the first noble gas data alongside new lithophile (Sr-Nd-Pb) isotopic data for mantle xenoliths from Pali-Aike Volcanic Field and Gobernador Gregores, Southern Patagonia. Based on noble gas isotopic compositions, Pali-Aike mantle xenoliths represent intrinsic SCLM with higher (U + Th + K)/(3He, 22Ne, 36Ar) ratios than the mid-ocean ridge basalt (MORB) source. This reservoir shows slightly radiogenic helium (3He/4He = 6.84-6.90 RA), coupled with a strongly nucleogenic neon signature (mantle source 21Ne/22Ne = 0.085-0.094). The 40Ar/36Ar ratios vary from a near-atmospheric ratio of 510 up to 17700, with mantle source 40Ar/36Ar between 31100-6800+9400 and 54000-9600+14200. In addition, the 3He/22Ne ratios for the local SCLM endmember, at 12.03 ± 0.15 to 13.66 ± 0.37, are higher than depleted MORBs, at 3He/22Ne = 8.31-9.75. Although asthenospheric mantle upwelling through the Patagonian slab window would result in a MORB-like metasomatism after collision of the South Chile Ridge with the Chile trench ca. 14 Ma, this mantle reservoir could have remained unhomogenized after rapid passage and northward migration of the Chile Triple Junction. The mantle endmember xenon isotopic ratios of Pali-Aike mantle xenoliths, which is first defined for any SCLM-derived samples, show values indistinguishable from the MORB source (129Xe/132Xe =1.0833-0.0053+0.0216 and 136Xe/132Xe =0.3761-0.0034+0.0246). The noble gas component observed in Gobernador Gregores mantle xenoliths is characterized by isotopic compositions in the MORB range in terms of helium (3He/4He = 7.17-7.37 RA), but with slightly nucleogenic neon (mantle source 21Ne/22Ne = 0.065-0.079). We

Darbishire expands his vision of heredity from Mendelian genetics to inherited memory.

Science.gov (United States)

Wood, Roger J

2015-10-01

The British biologist A.D. Darbishire (1879-1915) responded to the rediscovery in 1900 of Mendel's theory of heredity by testing it experimentally, first in Oxford, then in Manchester and London. He summarised his conclusions in a textbook 'Breeding and the Mendelian Discovery' (1911), in which he questioned whether Mendelism alone could explain all aspects of practical breeding experience. Already he had begun to think about an alternative theory to give greater emphasis to the widely held conviction among breeders regarding the inheritance of characteristics acquired during an individual's life. Redefining heredity in terms of a germ-plasm based biological memory, he used vocabulary drawn partly from sources outside conventional science, including the metaphysical/vitalistic writings of Samuel Butler and Henri Bergson. An evolving hereditary memory fitted well with the conception of breeding as a creative art aimed at greater economic efficiency. For evolution beyond human control he proposed a self-modifying process, claiming it to surpass in efficiency the chancy mechanism of natural selection proposed by Darwin. From his writings, including early chapters of an unfinished book entitled 'An Introduction to a Biology', we consider how he reached these concepts and how they relate to later advances in understanding the genome and the genetic programme. Copyright © 2015 Elsevier Ltd. All rights reserved.

Specificities of the small and medium-sized enterprises in the Czech Republic and EU

Directory of Open Access Journals (Sweden)

Helena Chládková

2010-01-01

Full Text Available Small and medium enterprises (SME are the engine of the European economy. They are an essential source of jobs, create entrepreneurial spirit and innovation in the EU and are thus crucial for fostering competitiveness and employment. In the enlarged European Union of 27 countries, some 20 million SMEs provide around 75 million jobs and represent 99 % of all enterprises. However, they are often confronted with market imperfections. SMEs frequently have difficulties in obtaining capital or credit, particularly in the early start–up phase. Their limited resources may also restrict access to new technology or innovation. It is therefore necessary to monitor the development of SMEs in individual EU countries and highlighting their problems and mainly to their importance.During the recent period of time there have been many researchers from the FBE Mendel University in Brno, who focused on the analysis of the small and medium-sized enterprise, e.g. Bohušová (2007; Chládková (2009; Nerudová a Bohušová (2008; Kubíčková a Peprný (2006; Zrůst a Pyšný (2008. This paper is the part of the Research proposal MSM 6215648904 being solved at the FBE Mendel University in Brno.

Soldier Beliefs about the Readiness of Military Personnel with Mild Traumatic Brain Injury

Science.gov (United States)

2014-05-19

Those who suffer an mTBI may experience neuropsychological difficulties following the injury lasting typically a few days to a few weeks (Hanna... Schizophrenia Bulletin. 30: 511-541. MacGregor, A. J., Shaffer, R. A., Dougherty, A. L., Galarneau, M. R., Raman, R., et al. 2010. Prevalence and...Journal of the International Neuropsychological Society. 16: 705- 710. Mittal, D., Drummond, K. L., Blevins, D., Curran, G. C., Corrigan, P., and

The tamers of cold chaos; Die Dompteure des kalten Chaos

Energy Technology Data Exchange (ETDEWEB)

Hergersberg, P.

2008-07-01

The ISS International Space Station hosts only a select number of scientific experiments - like those of GREGOR E. MORFILL and his staff at the MAX PLANCK INSTITUTE FOR EXTRATERRESTRIAL PHYSICS. These physicists whip cold plasmas consisting of charged microparticles into line in order to study their crystallization, turbulence or flow properties through a nozzle. The results of these studies are relevant for applications in medicine and the microchip industry. (orig.)

Forced response of the East Asian summer rainfall over the past millennium: results from a coupled model simulation

Energy Technology Data Exchange (ETDEWEB)

Liu, Jian; Wang, Hongli; Ti, Ruyuan [Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, State Key Laboratory of Lake Science and Environment, Nanjing (China); Wang, Bin [University of Hawaii at Manoa, Department of Meteorology and IPRC, Honolulu, HI (United States); Kuang, Xueyuan [Nanjing University, School of Atmospheric Sciences, Nanjing (China)

2011-01-15

The centennial-millennial variation of the East Asian summer monsoon (EASM) precipitation over the past 1000 years was investigated through the analysis of a millennium simulation of the coupled ECHO-G model. The model results indicate that the centennial-millennial variation of the EASM is essentially a forced response to the external radiative forcing (insolation, volcanic aerosol, and green house gases). The strength of the response depends on latitude; and the spatial structure of the centennial-millennial variation differs from the interannual variability that arises primarily from the internal feedback processes within the climate system. On millennial time scale, the extratropical and subtropical precipitation was generally strong during Medieval Warm Period (MWP) and weak during Little Ice Age (LIA). The tropical rainfall is insensitive to the effective solar radiation forcing (insolation plus radiative effect of volcanic aerosols) but significantly responds to the modern anthropogenic radiative forcing. On centennial time scale, the variation of the extratropical and subtropical rainfall also tends to follow the effective solar radiation forcing closely. The forced response features in-phase rainfall variability between the extratropics and subtropics, which is in contrast to the anti-correlation on the interannual time scale. Further, the behavior of the interannual-decadal variation in the extratropics is effectively modulated by change of the mean states on the millennial time scale, suggesting that the structure of the internal mode may vary with significant changes in the external forcing. These findings imply that on the millennial time scale, (a) the proxy data in the extratropical EA may more sensitively reflect the EASM rainfall variations, and (b) the Meiyu and the northern China rainfall provide a consistent measure for the EASM strength. (orig.)

Holocene hydrologic variation at Lake Titicaca, Bolivia/Peru, and its relationship to North Atlantic climate variation

Science.gov (United States)

Baker, P. A.; Fritz, S. C.; Garland, J.; Ekdahl, E.

2005-10-01

A growing number of sites in the Northern Hemisphere show centennial- to millennial-scale climate variation that has been correlated with change in solar variability or with change in North Atlantic circulation. However, it is unclear how (or whether) these oscillations in the climate system are manifest in the Southern Hemisphere because of a lack of sites with suitably high sampling resolution. In this paper, we reconstruct the lake-level history of Lake Titicaca, using the carbon isotopic content of sedimentary organic matter, to evaluate centennial- to millennial-scale precipitation variation and its phasing relative to sites in the Northern Hemisphere. The pattern and timing of lake-level change in Lake Titicaca is similar to the ice-rafted debris record of Holocene Bond events, demonstrating a possible coupling between precipitation variation on the Altiplano and North Atlantic sea-surface temperatures (SSTs). The cold periods of the Holocene Bond events correspond with periods of increased precipitation on the Altiplano. Holocene precipitation variability on the Altiplano is anti-phased with respect to precipitation in the Northern Hemisphere monsoon region. More generally, the tropical Andes underwent large changes in precipitation on centennial-to-millennial timescales during the Holocene.

Stalagmite-derived Last Glacial Maximum - Mid Holocene Indian Monsoon Record from Krem Mawmluh, Meghalaya, NE India

Science.gov (United States)

Lone, M. A.; Routh, J.; Kumar, V.; Mangini, A.; Rangarajan, R.; Ghosh, P.; Munnuru Singamshetty, K.; Shen, C. C.; Ahmad, S. M.; Mii, H. S.

2016-12-01

Seasonal reversals in monsoon winds strongly influence rainfall patterns on the Indian sub-continent regulating the socio-economy of south Asian region. High-resolution centennial-millennial scale records of climate change from the core zone of the monsoon impacted region are nonetheless very few. Here, we report Indian summer monsoon (ISM) variability record from an 87-cm long stalagmite (KM-1) from Krem Mawmluh in the Khasi Hills, Meghalaya. The absolute dated stalagmite record ranges from 22.7 (LGM) to 6.7 ka (Mid Holocene), revealing last glacial-interglacial paleoclimatic changes over the Indian sub-continent. A sharp change in δ18O ( 5‰) and growth rate post Younger Dryas (YD) is marked by continued rapid speleogenesis in KM-1 and coincides with monsoon intensification during the early Holocene. Prominent multi-centennial to millennial scale dry phases in ISM activity are observed from LGM to YD. During early to mid-Holocene, the record shows significant multi-decadal to centennial scale changes. The high frequency δ18O variations referring to abrupt changes in ISM activity are believed to be driven by changes in temperature and shifting of Inter-Tropical Convergence Zone.

Komunikační mix Svatebního salonu INA

OpenAIRE

Rybníčková, Michala

2015-01-01

Rybníčková, M. Marketing mix for Wedding Boutique INA. Bachelor thesis, Brno: Mendel university in Brno, 2015 This Bechelor thesis focuses on the marketing mix for the company Wedding Boutique INA. Survey results are used to evaluate the effectiveness of marketing tools currently used by INA. Furthermore, the results are used to recommend improvements to the marketing mix. Thesis also includes calculation of costs and scheduling for the year 2015.

Progressive technologies in furniture design

OpenAIRE

Šebková, Martina

2014-01-01

Šebková, M. Progressive technologies in furniture design. Diploma thesis, Brno, Mendel University in Brno, 2014 Diploma thesis 'Progressive technologies in furniture design' is focused on the use of modern technologies in furniture production. The theoretical part explains the basic terms, technology and material options. It focuses mainly on the production of 3D printed furniture and possibilities of virtual testing, measurements, scanning and rapid prototyping. Practical part of diploma the...

Konsolidácia účtovnej závierky vo verejnej správe Slovenskej republiky

OpenAIRE

Rybníčková, Veronika

2014-01-01

Rybničková V., Consolidated financial statement in public sector in Slovakia, bachelor thesis. Ing. Patrik Svoboda Ph. D. - supervisor, Mendel University in Brno, 2014. This thesis deals with consolidated financial statement in Slovak public sector. The legislation needed for consolidation, as well as its importance in public sector is described, but also the methods of consolidation are explained on specific examples. The thesis is composed of the consolidation process itself, and the subseq...

The history of genetics in Mexico in the light of A Cultural History of Heredity.

Science.gov (United States)

Barahona, Ana

2013-01-01

In this paper I analyze the conditions for scientific research and the social relationships that allowed the establishment of genetics in Mexico, in the laboratory, the clinic and in agronomy. I give three examples to illustrate how the cultural history of heredity has enlightened this work: the introduction and institutionalization of Mendelism in Mexico, the hereditarian ideas of medical doctors in the late nineteenth century, and the introduction of medical genetics in Mexico.

Heredity before genetics: a history.

Science.gov (United States)

Cobb, Matthew

2006-12-01

Two hundred years ago, biologists did not recognize that there was such a thing as 'heredity'. By the 1830s, however, insights from medicine and agriculture had indicated that something is passed from generation to generation, creating the context for the brilliant advances of Mendel and Darwin. Recent work on the history and philosophy of science has shed light on how seventeenth-, eighteenth- and nineteenth-century thinkers sought to understand similarities between parents and offspring.

Colombia’s Conflicts: The Spillover Effects of a Wider War

Science.gov (United States)

2002-10-01

a summary of the history and impact of civil violence on Colombian history, see Comision de estudios sobre la violencia, Colombia: Violencia y...Brasilia pie acapos del Cartel de brasil,” El Nuevo Herald, March 27, 2001; Mendel, p. 7. 87. Quoted in Gentleman, pp. 28-29. 88. “Tracion en el mercado ...guerrilla groups, the leftist Revolutionary Armed Forces of Colombia (FARC) and Ejercito de Liberacion Nacional (ELN) and the rightist Auto Defensas

Imported anthropogenic bacteria may survive the Antarctic winter and introduce new genes into local bacterial communities

OpenAIRE

Brat Kristian; Sedlacek Ivo; Sevcikova Alena; Merta Zdenek; Laska Kamil; Sevcik Pavel

2016-01-01

We studied dynamic changes in anthropogenic bacterial communities at a summer-operated Czech research base (the Mendel Research Station) in the Antarctic during 2012 and 2013. We observed an increase in total numbers of detected bacteria between the beginning and the end of each stay in the Antarctic. In the first series of samples, bacteria of Bacillus sp. predominated. Surprisingly, high numbers of Gram-positive cocci and coliforms were found (including opportunistic human pathogens), altho...

Návrh vhodných strategií pro potravinářský podnik

OpenAIRE

Homolka, Ondřej

2014-01-01

Homolka, O. Design of appropriate strategies for an food company. Bachelor thesis. Brno: Mendel University, 2014. This bachelor thesis deals with evaluation of the current situation and proposal of appropriate strategies for the food company for the future. The thesis is divided to two main parts. The theoretical part is compiled from technical literature. The practical part is based on the analyses of external and internal business environment on which are identified opportunities and threat...

Založení komanditní společnosti

OpenAIRE

Bauer, Nicole

2014-01-01

Bauer N. The Establishment of limited partnership. Bachelor thesis. Brno: Mendel University, 2014. This bachelor thesis covers the topic of establishment of limited partnership. Fur-thermore, advantages and disadvantages are outlined in contrast to other types of companies. This thesis deals with analysis and description of limited partnership in the theoretical part. In the practical part it comes up with an instruction for establishment of the limited partnership and compares limited partne...

Monsoonal Responses to External Forcings over the Past Millennium: A Model Study (Invited)

Science.gov (United States)

Liu, J.; Wang, B.

2009-12-01

The climate variations related to Global Monsoon (GM) and East Asian summer monsoon (EASM) rainfall over the past 1000 years were investigated by analysis of a pair of millennium simulations with the coupled climate model named ECHO-G. The free run was generated using fixed external (annual cycle) forcing, while the forced run was obtained using time-varying solar irradiance variability, greenhouse gases (CO2 and CH4) concentration and estimated radiative effect of volcanic aerosols. The model results indicate that the centennial-millennial variation of the GM and EASM is essentially a forced response to the external radiative forcings (insolation, volcanic aerosols, and greenhouse gases). The GM strength responds more directly to the effective solar forcing (insolation plus radiative effect of the volcanoes) when compared to responses of the global mean surface temperature on centennial timescale. The simulated GM precipitation in the forced run exhibits a significant quasi-bi-centennial oscillation. Weak GM precipitation was simulated during the Little Ice Age (1450-1850) with three weakest periods concurring with the Spörer, Maunder, and Dalton Minimum of solar activity. Conversely, strong GM was simulated during the model Medieval Warm Period (ca. 1030-1240). Before the industrial period, the natural variation in effective solar forcing reinforces the thermal contrasts both between the ocean and continent and between the northern and southern hemispheres, resulting in millennium-scale variation and the quasi-bi-centennial oscillation of the GM. The prominent upward trend in the GM precipitation occurring in the last century and the remarkably strengthening of the global monsoon in the period of 1961-1990 appear unprecedented and owed possibly in part to the increase of atmospheric carbon dioxide concentration. The EASM has the largest meridional extent (5oN-55oN) among all the regional monsoons on globe. Thus, the EASM provides an unique opportunity for

Voluntary Falling in Spider Mites in Response to Different Ecological Conditions at Landing Points

OpenAIRE

Ohzora, Yousuke; Yano, Shuichi

2011-01-01

We examined voluntary-falling behaviour by adult females of the two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) and one of its major predators Neoseiulus californicus McGregor (Acari: Phytoseiidae). Experiments were conducted using a setup in which mites could only move onto one of two landing points by falling. Significantly more T. urticae females fell onto available food leaves compared to non-food or heavily infested leaves, whereas significantly fewer females fell...

Electric power systems advanced forecasting techniques and optimal generation scheduling

CERN Document Server

Catalão, João P S

2012-01-01

Overview of Electric Power Generation SystemsCláudio MonteiroUncertainty and Risk in Generation SchedulingRabih A. JabrShort-Term Load ForecastingAlexandre P. Alves da Silva and Vitor H. FerreiraShort-Term Electricity Price ForecastingNima AmjadyShort-Term Wind Power ForecastingGregor Giebel and Michael DenhardPrice-Based Scheduling for GencosGovinda B. Shrestha and Songbo QiaoOptimal Self-Schedule of a Hydro Producer under UncertaintyF. Javier Díaz and Javie

TECRA: C2 Application of Adaptive Automation Theory

Science.gov (United States)

2010-03-01

1 TECRA: C2 Application of Adaptive Automation Theory Ewart J. de Visser 1,2 , Melanie LeGoullon 1 , Don Horvath 1 , Gershon Weltman 1 , Amos...this second trip served to inform a modified version of Klein , Calderwood, and MacGregor’s [7] Critical Decision Method Cognitive Task Analysis (CTA...NSN:1550-01-538-9256, EIC:ICB, January 9. [7] Klein , G. A., Calderwood, R., & MacGregor, D. (1989). Critical decision method for eliciting

F-35A Training Basing Environmental Impact Statement. Volume 1

Science.gov (United States)

2012-06-01

experience natural soundscapes in national park units, and could similarly diminish the qualities of natural quiet that are intrinsic to recreational...Tables HO 3.10–9 and HO 3.10–10. Increased noise could diminish opportunities for visitors to experience natural soundscapes in national park units...characterized by a natural quite soundscape but has few visitors. The greatest impact could occur for recreation on the Otero Mesa of McGregor Range and the

Achievement Goals, Competition Appraisals, and the Psychological and Emotional Welfare of Sport Participants

OpenAIRE

Adie, James W; Duda, Joan L; Ntoumanis, Nikos

2008-01-01

Grounded in the 2 × 2 achievement goal framework (Elliot & McGregor, 2001), a model was tested examining the hypothesized relationships between approach and avoidance (mastery and performance) goals, challenge and threat appraisals of sport competition, and positive and negative indices of well-being (i.e., self-esteem, positive, and negative affect). A further aim was to determine the degree to which the cognitive appraisals mediated the relationship between the four achievement goals and th...

Physiologic Systems and Their Responses to Conditions of Heat and Cold

Science.gov (United States)

2012-01-01

Nutrition , Tenth Edition • Human Water and Electrolyte Balance Water (total bc.dy water) plays many unique and vital roles within the body. Warer is...t’t n/., 1996). The mismarch between intakes and losses is due to 496 Present Knowledge in Nutrition , Tenth Editi on • Human Water and Electrolyte...the ability to perform endurance-type physic al activities. For example, McGregor et a!. ( 1999) reporte d that semi-professional soccer players

Decoupling of coral skeletal δ13C and solar irradiance over the past millennium caused by the oceanic Suess effect

Science.gov (United States)

Deng, Wenfeng; Chen, Xuefei; Wei, Gangjian; Zeng, Ti; Zhao, Jian-xin

2017-02-01

Many factors influence the seasonal changes in δ13C levels in coral skeletons; consequently, the climatic and environmental significance of such changes is complicated and controversial. However, it is widely accepted that the secular declining trend of coral δ13C over the past 200 years reflects the changes in the additional flux of anthropogenic CO2 from the atmosphere into the surface oceans. Even so, the centennial-scale variations, and their significance, of coral δ13C before the Industrial Revolution remain unclear. Based on an annually resolved coral δ13C record from the northern South China Sea, the centennial-scale variations of coral δ13C over the past millennium were studied. The coral δ13C and total solar irradiance (TSI) have a significant positive Pearson correlation and coupled variation during the Medieval Warm Period and Little Ice Age, when natural forcing controlled the climate and environment. This covariation suggests that TSI controls coral δ13C by affecting the photosynthetic activity of the endosymbiotic zooxanthellae over centennial timescales. However, there was a decoupling of the coral skeletal δ13C and TSI during the Current Warm Period, the period in which the climate and environment became linked to anthropogenic factors. Instead, coral δ13C levels have a significant Pearson correlation with both the atmospheric CO2 concentration and δ13C levels in atmospheric CO2. The correlation between coral δ13C and atmospheric CO2 suggests that the oceanic 13C Suess effect, caused by the addition of increasing amounts of anthropogenic 12CO2 to the surface ocean, has led to the decoupling of coral δ13C and TSI at the centennial scale.

Analýza public relations na FRRMS

OpenAIRE

Rišková, Zuzana

2014-01-01

RIŠKOVÁ, Z. Analysis public relations of the FRRMS. Bachelor thesis. Brno, 2014. The bachelor thesis deals with public relations activities of the Faculty of Regional Development and International Studies (FRRMS) Mendel University in Brno (MENDELU). The aim of the thesis is to analyze public relations activities, what relations has FRRMS with the public. In the theoretical part is defined the meaning of the public relations, goals, starting points, tools and forms of public relations and the ...

Dental Caries in Rats Associated with Candida albicans

OpenAIRE

Klinke, Thomas; Guggenheim, Bernhard; Klimm, Wolfgang; Thurnheer, Thomas

2014-01-01

In addition to occasional opportunistic colonization of the oral mucosa, Candida albicans is frequently found in carious dentin. The yeast’s potential to induce dental caries as a consequence of its pronounced ability to produce and tolerate acids was investigated. Eighty caries-active Osborne-Mendel rats were raised on an ampicillin-supplemented diet and exposed to C. albicans and/or Streptococcus mutans, except for controls. Throughout the 28-day test period, the animals were offered the mo...

Issues in Strategic Thought: From Clausewitz to Al-Qaida

Science.gov (United States)

2012-12-01

1 Baron De Jomini, The Art of War, trans. G.H. Mendel and W.P. Craighill (El Paso , TX: El Paso Norte Press, 2005), 55. 2 BARON DE...commanders by relieving combat troops from having to maintain and guard their own supply lines.169 Bernhardi cited other forms of motorized transport...act close to the ground and to destroy ships on the seas or on canals, railroad trains, motors , convoys or anything of that nature. It attacks from

Analýza působení reklamy

OpenAIRE

Jelínková, Karolína

2015-01-01

Jelínková, K. Analysis of the effect of advertising. Bachelor thesis. Brno: Mendel University in Brno, 2014. This bachelor thesis is going to deal with the content of advertisement, which Council of advertising has been dealing with, from the point of view of their unethical and identify deceptive metod used in various commercials. In the theoretical part will be defined general knowledge of deceptive method and key concepts for the practical part such as advertising, deception,manipulation ,...

The Joint Chiefs of Staff and National Policy: 1965-1968 (History of the Joint Chiefs of Staff)

Science.gov (United States)

2012-01-01

car- rier would stop at Rio de Janeiro instead. When the Roosevelt was returning from war duties, early in 1967, the Navy directed that sailors "go...advice. On 28 April Representative Mendel Rivers (D, SC), Chairman of the Committee on Armed Services, introduced a bill lengthening the terms of...Reporting favorably, Rivers ’ Committee stated that "the sole objective... is to permit members of the Joint Chiefs of Staff to advise the Congress, as well

LA DOBLE FAZ DE LAS IMPLICACIONES DEL INVESTIGADOR | The double face of the researcher’s implications

OpenAIRE

Acevedo, Maria José

2016-01-01

The analysis of the doubts and blockages I would like to share through this article concerns the research done during my doctoral research. The purpose of that study was to explore the authority position in a particular group of workers: the teachers. That research is based on the epistemology of complexity and its theoretical references are the various currents of French clinical social psychology, particularly the Sociopsychoanalysis, founded by Gérard Mendel. It was that psychoanalyst and...

Návrh strategie destinačního managementu města Olomouce ke studentům místních vysokých škol

OpenAIRE

Karlová, Edita

2015-01-01

Karlová E., Proposal of strategy to destination management to students of universities in Olomouc. Bachelor thesis. Brno: Mendel University in Brno, 2015. Bachelor thesis is focused on analysis of tourism in Olomouc, attitude to tourism and spending spare time by students. First part of the thesis is aimed on describing theory of tourism, tourism management, tourist behaviour, destination management, spare time and travelling of youth. Analysis of tourist trade in Olomouc was made from the st...

Long-term iron deficiency: Tracing changes in the proteome of different pea (Pisum sativum L.) cultivars.

Science.gov (United States)

Meisrimler, Claudia-Nicole; Wienkoop, Stefanie; Lyon, David; Geilfus, Christoph-Martin; Lüthje, Sabine

2016-05-17

Iron deficiency (-Fe) is one of the major problems in crop production. Dicots, like pea (Pisum sativum L.), are Strategy I plants, which induce a group of specific enzymes such as Fe(III)-chelate reductase (FRO), Fe responsive transporter (IRT) and H(+)-ATPase (HA) at the root plasma membrane under -Fe. Different species and cultivars have been shown to react diversely to -Fe. Furthermore, different kinds of experimental set-ups for -Fe have to be distinguished: i) short-term vs. long-term, ii) constant vs. acute alteration and iii) buffered vs. unbuffered systems. The presented work compares the effects of constant long-term -Fe in an unbuffered system on roots of four different pea cultivars in a timely manner (12, 19 and 25days). To differentiate the effects of -Fe and plant development, control plants (+Fe) were analyzed in comparison to -Fe plants. Besides physiological measurements, an integrative study was conducted using a comprehensive proteome analysis. Proteins, related to stress adaptation (e.g. HSP), reactive oxygen species related proteins and proteins of the mitochondrial electron transport were identified to be changed in their abundance. Regulations and possible functions of identified proteins are discussed. Pea (Pisum sativum L.) belongs to the legume family (Fabaceae) and is an important crop plant due to high Fe, starch and protein contents. According to FAOSTAT data (September 2015), world production of the garden pea quadrupled from 1970 to 2012. Since the initial studies by Gregor Mendel, the garden pea became the most-characterized legume and has been used in numerous investigations in plant biochemistry and physiology, but is not well represented in the "omics"-related fields. A major limitation in pea production is the Fe availability from soils. Adaption mechanisms to Fe deficiency vary between species, and even cultivars have been shown to react diversely. A label-free proteomic approach, in combination with physiological measurements

78 FR 61390 - Notice of Determinations Regarding Eligibility To Apply for Worker Adjustment Assistance

Science.gov (United States)

2013-10-03

... 82,962 Horror Entertainment, LLC, d/b/a Santa Monica, CA.... FEARnet, Eleventh Hour. [[Page 61392... Ready. 82,864 Homestead Technologies, Centennial, CO...... Intuit, Inc., Endurance International Group...

Leading Millennials Motivating And Leading Millennial Service Members

Science.gov (United States)

2016-02-20

the first to experience a divorce rate that peaked in the 80’s at 50% of all 7 marriages in the United States. When they entered into the job ...aircraft. LTC MacGregor also commanded an active duty National Guard Recruiting and Retention Battalion for 2 years. Following her commands she served...recession in the early 90’s while simultaneously competing for jobs against Boomers with much more experience. The Generation X cohort was born

Centennial of general relativity a celebration

CERN Document Server

2017-01-01

It has been over 100 years since the presentation of the Theory of General Relativity by Albert Einstein, in its final formulation, to the Royal Prussian Academy of Sciences. To celebrate 100 years of general relativity, World Scientific publishes this volume with a dual goal: to assess the current status of the field of general relativity in broad terms, and discuss future directions. The volume thus consists of broad overviews summarizing major developments over the past decades and their perspective contributions.

Ettore Majorana centennial and neutrino legacy

Energy Technology Data Exchange (ETDEWEB)

Esposito, Salvatore [Universita di Napoli ' Federico II' and I.N.F.N. Sezione di Napoli, Complesso Universitario di Monte S. Angelo - Via Cinthia - 80126 Napoli (Italy)], E-mail: sesposit@na.infn.it

2007-06-15

'In the world there are various categories of scientists: people of secondary or tertiary standing, who do their best but do not go very far. There are also those of high standing, who come to discoveries of great importance. But then there are geniuses like Galileo and Newton. Well, Ettore was one of them. Majorana had what no one else in the world has...'. In this talk we try to put some light on this quite unusual statement by Enrico Fermi about Ettore Majorana, by exploring mainly personal notes left unpublished by the great sicilian physicist. Some emphasis is given on recent achievements about Majorana as a research scientist as well as a teacher in Theoretical Physics.

Introduction to the Tinbergen Centennial Issue

OpenAIRE

Cornelisse, P.A.; Don, Henk; Dijk, Herman

2004-01-01

textabstractOn April 12, 2003 it was hundred years ago that Jan Tinbergen was born. In 1969 he received, together with Ragnar Frisch, the first Nobel Prize in Economics 'for having developed and applied dynamic models for the analysis of economic processes'. In this issue of De Economist, which commemorates Tinbergen's 100th anniversary, three other Nobel laureates, viz. Paul Samuelson, Lawrence Klein and Robert Solow, give their views on this and other contributions by Tinbergen to economic ...

Darwinism – A Sesqui-Centennial Celebration

Indian Academy of Sciences (India)

Srimath

2009-03-31

, Organizing Secretary Zoology Dept. Karnatak University,. Dharwad 580 003, Email: bhagyashrishanbhag@gmail.com. Organisers: Prof. Raghavendra Gadagkar, Centre for Ecological Sciences, Indian Institute of Science, ...

Jensenite, Cu3 Te (super 6+) O6 .2H2O, a new mineral species from the Centennial Eureka Mine, Tintic District, Juab County, Utah

Science.gov (United States)

Roberts, Andrew C.; Grice, Joel D.; Groat, Lee A.; Criddle, Alan J.; Gault, Robert A.; Erd, Richard C.; Moffatt, Elizabeth A.

1996-01-01

Jensenite, ideally Cu 3 Te (super 6+) O 6 .2H 2 O, is monoclinic, P2 1 /n (14), with unit-cell parameters refined from powder data: a 9.204(2), b 9.170(2), c 7.584(1) Aa, beta 102.32(3) degrees , V 625.3(3) Aa 3 , a:b:c 1.0037:1:0.8270, Z = 4. The strongest six reflections of the X-ray powder-diffraction pattern [d in Aa(I)(hkl)] are: 6.428(100)(101,110), 3.217(70)(202), 2.601(40)(202), 2.530(50)(230), 2.144(35)(331) and 1.750(35)(432). The mineral is found on the dumps of the Centennial Eureka mine, Juab County, Utah, where it occurs as isolated crystals or as groups of crystals on drusy white quartz. Associated minerals are mcalpineite, xocomecatlite and unnamed Cu(Mg,Cu,Fe,Zn) 2 Te (super 6+) O 6 .6H 2 O. Individual crystals of jensenite are subhedral to euhedral, and form simple rhombs that are nearly equant. Some crystals are slightly elongate [101], with a length-to-width ratio up to 2:1. The largest crystal is approximately 0.4 mm in size; the average size is between 0.1 and 0.2 mm. Cleavage {101} fair. Forms are: {101} major; {110} medium; {100} minor; {301}, {201}, {203}, {102}, {010} very small. The mineral is transparent, emerald green, with a less intense streak of the same color and an uneven fracture. Jensenite is adamantine, brittle and nonfluorescent; H (Mohs) 3-4; D (calc.) 4.78 for the idealized formula, 4.76 g/cm 3 for the empirical formula. In a polished section, jensenite is very weakly bireflectant and nonpleochroic. In reflected plane-polarized light in air, it is a nondescript grey, and in oil, it is a much darker grey in color with a brownish tint, with ubiquitous bright green internal reflections. Anisotropy is not detectable. Measured values of reflectance, in air and in oil, are tabulated. Electron-microprobe analyses yielded CuO 50.91, ZnO 0.31, TeO 3 38.91, H 2 O (calc.) [8.00], total [98.13] wt.%. The empirical formula, derived from crystal-structure analysis and electron-microprobe analyses, is (Cu (sub 2.92) Zn (sub 0.02) ) (sub

Zhodnocení ekonomických dopadů fluktuace zaměstnanců ve společnosti NEW YORKER CZ, s.r.o.

OpenAIRE

Válková, Markéta

2014-01-01

Abstract Válková, M. Evaluation the economic impact of employees fluctuation in the New Yorker company. Bachelor thesis. Brno: Mendel University, 2014. This bachelor thesis is focused mainly on turnover rate of employees and the eco-nomic impact of it in New Yorker company. The first part deals with staff turnover in general. It explains the basic concept of fluctuation, its main causes and positive also negative impacts. It also describes human resources planning and its impact on employee t...

Inovace a rozšíření inventarizačního systému

OpenAIRE

Král, Jan

2015-01-01

The bachelor thesis deals with the innovation of the inventory control system used at the Department of Informatics, Mendel University, which is used for recording the flow of assets during the year. Thesis at the beginning discusses how the old system complies with the current needs of users. Based on this analysis is designed new inventory control system, which eliminates the problems of old system and adds new functionality. The new system is implemented as a web application in PHP using t...

Horticulture: the font for the baptism of genetics.

Science.gov (United States)

Olby, R C

2000-10-01

This year marks the centenary of the rediscovery of the laws of heredity, and their introduction to the English-speaking world. Here I introduce the main events and the characters who figure in this story before turning to the task of this essay--to ask why it was that support in England for the emerging science of genetics, or Mendelism as it was then called, came chiefly from horticulture, and was only belatedly accepted into the mainstream of British academic biology.

Přínosy veletrhu REGIONTOUR

OpenAIRE

Kolková, Lucie

2015-01-01

Kolková, L., The benefits of the REGIONTOUR Trade Fair. Bachelor Thesis. Brno: Mendel University, 2015. This thesis deals with the benefits of the REGIONTOUR Trade Fair in Brno. The part of this thesis describes BVV Trade Fairs Brno, a.s. and it's position in a com-petitive marketplace and a specific definition of the REGIONTOUR trade fair with an approximation of current trends in the REGIONTOUR Trade Fair. The practical part is focused on business conditions, business, marketing and social ...

Možnosti uplatnění konceptu komunitního turismu pro zlepšení socioekonomické situace vybrané komunity v Peru

OpenAIRE

Macháčková ., Tereza

2014-01-01

Macháčková T. The possibilities of utilizing the concept of community-based tourism to im-prove the socio-economic situation of selected community in Peru. Bachelor thesis. Mendel University in Brno, 2014. This bachelor thesis deals with the topic of possible usage of the concept "Community-based tourism" in the selected community Llaqquepata in Peru as the option for improving their socio-economic situation and the living standards. This the-sis concludes with the specific developing proposa...

Návrh integrace IPv6 do počítačové sítě Mendelovy univerzity v Brně v oblasti směrování

OpenAIRE

Filip, Tomáš

2015-01-01

This master thesis deals with integration of IPv6 network protocol into production computer network of Mendel University in Brno in the routing field. The integration includes the Dual Stack transition mechanism, IPv6 address plan, static routing at the perimeter of the university network, and OSPFv3 and MP-BGP routing protocols. Proposed integration plan was verified in the Laboratory of computer networking at the Department of Informatics at FBE MENDELU, and it serves as a template for a fi...

Motivácia zamestnancov v podniku Schwer Fittings, s.r.o., Martin

OpenAIRE

Badová, Andrea

2014-01-01

Badová, A., Employee motivation in the company Schwer Fittings, s.r.o., Martin. Bachelor thesis. Brno: Mendel University in Brno, 2013. This bachelor thesis is focused on employee motivation in Schwer Fittings, s.r.o., Martin. Main goal of this thesis is to evaluate current state of motivation system in this company and to suggest recommendations that can contribute to increase in employee motivation and to overall satisfaction. The theoretical part is based on literature mentioned in my work...

75 FR 5628 - National Register of Historic Places; Notification of Pending Nominations and Related Actions

Science.gov (United States)

2010-02-03

... Robin Way and Pierce Rd., Altus, 10000033 Stone County North Sylamore Creek Bridge (Historic Bridges of...., Glen Ellyn, 10000038 MASSACHUSETTS Essex County First Parish Burial Ground, 122-R Centennial Ave...

Biological control of Eotetranychus lewisi and Tetranychus urticae (Acari: Tetranychidae) on strawberry by four phytoseiids (Acari: Phytoseiidae).

Science.gov (United States)

Howell, Anna D; Daugovish, Oleg

2013-02-01

The spider mite, Eotetranychus lewisi (McGregor) (Acari: Tetranychidae), is a new emerging pest in California commercial strawberries. The predatory mite Phytoseiulus persimilis (Athias-Henriot) (Acari: Phytoseiidae), typically used for biocontrol of Tetranychus urticae (Koch) (Acari: Tetranychidae), provided growers little to no control of E. lewisi. Four commonly used phytoseiid predatory mites: P. persimilis, Neoseiulus californicus (McGregor), N. fallacis (Garman), and Amblyseius andersoni (Chant), were used in lab studies to investigate which is best at managing E. lewisi populations. We als o investigated t he interactions between T. urticae and E. lewisi and in relation to phytoseiid efficiency given the potential for indirect effects of biocontrol. When E. lewisi and T. urticae are present on the same leaf, T. urticae populations increase and begin displacing E. lewisi. P. persimilis did not feed on E. lewisi, but the other three predatory mites consumed the spider mites and lowered their populations. When both E. lewisi and T. urticae are present on the same leaf, N. fallacis and A. andersoni fed on both types of mites equally and were capable of decreasing both populations. N. californicus fed on E. lewisi first and decreased its population, but allowed T. urticae populations to increase. P. persimilis may be insufficient at controlling E. lewisi and its use may instead enhance E. lewisi populations.

Calculating the Ionization Constant of Functional Groups of Carboxyl Ion Exchangers

Science.gov (United States)

Meychik, N. R.; Stepanov, S. I.; Nikolaeva, Yu. I.

2018-02-01

The potentiometric titration of a weakly basic carboxyl cation exchanger, obtained via alkaline hydrolysis of an acrylonitrile copolymer with divinyl benzene (degree of crosslinking, 12%) in a wide range of variation in a solution of pH (2-12) and NaCl (concentration 0.01, 0.1, 0.5, 1 M), is considered. The maximum ion-exchange capacity of the ion exchanger for Na+ is determined (10.10 ± 0.088 mmol/g of the dry mass) and found to be independent of the solution's ionic strength. It is established that in the investigated range of NaCl concentrations and pH, the acid-base balance is adequately described by Gregor's equation. The parameters of this equation are calculated as a function of the NaCl concentration: p K a = 8.13 ± 0.04, n = 1.50 ± 0.02 for 0.01 M; p K a = 6.56 ± 0.04, n = 2.60 ± 0.07 for 0.1 M; and p K a = 5.66 ± 0.6, n = 2.62 ± 0.06 for 0.5 and 1 M. It is shown that to describe the acid-base balance correctly within the proposed model we must estimate the adequacy of the experimental and calculated values of the ion exchanger's capacity at each pH value according to the calculated parameters of Gregor's equation.

Motivace zaměstnanců v organizaci

OpenAIRE

Vágnerová, Monika

2015-01-01

The aim of the thesis is to investigate the current state of the system of the motivating employees in FOX company. The theoretical part deals with importance of the motivating employees for the success of the company. The forms of motivating are categorized here (for example internal and external motivating). The part also describes the theories of motivating like the Theory of the instrumentality, the content focused theories, the theories based on process and McGregors theory of X and Y. T...

Motivace učitelky MŠ z hlediska motivačních teorií

OpenAIRE

DUTKOVÁ, Pavlína

2009-01-01

The thesis deals with analysis of reflection and self reflection of motivation of kindergarten teachers. Motivation from the point of view of selected motivation techniques is evaluated by kindergarten teachers, managers and headteachers. To compare motivation techniques, the author set up and used her own questionnaire, focusing on Maslow´s Hierarchy of Needs, McGregor´s Theory X-Y and Herzberg´s Dual Factor Theory, which helps us determine if human needs are satisfied. The thesis gives a co...

AC/DC Smart Control And Power Sharing of DC Distribution Systems

Science.gov (United States)

2012-02-10

ISRCS 2011, Boise, Idaho, USA, Pages 89-84, IEEE Xplore DOI 10.1109/ISRCS.2011.6016095, Aug 9-11, 2011. 8. A. Mohamed, M. Elshaer and O. A...Manooth, “A Survey of Systems to Integrate Distributed Energy Resources and Energy Storage on the Utility Grid,” in IEEE 2008 Energy 2030 Conf., 2008...Georgia, USA. [2] H. Puttgen, P. MacGregor, F. Lambert, “Distributed Generation: Semantic Hype or the Dawn of a New Era,” IEEE Power and Energy

Glossary

OpenAIRE

2015-01-01

Sanskrit terms in bold are given according to the IAST (International Alphabet of Sanskrit Transliteration) transcription standard. The main reference used for this glossary is the Oxford Hindi-English Dictionary, edited by R. S. McGregor (Oxford: Oxford University Press, 2007). AgniAgni: the two-headed god of fire and the recipient of daily sacrifice as messenger of the gods. One of his heads signifies immortality, while the other is considered a symbol of life renewal. Ahimsaahiṃsā: “the av...

VT Biodiversity Project - Bedrock Classification

Data.gov (United States)

Vermont Center for Geographic Information — (Link to Metadata) This dataset is a five category, nine sub-category classification of the bedrock units appearing on the Centennial Geologic Map of Vermont. The...

[Graft hybridization and the specificity of heredity in fruit trees].

Science.gov (United States)

Liu, Yong-Sheng; Li, Bao-Yin; Li, Gui-Rong; Zhou, Xiu-Mei

2004-09-01

Emphatically discusses the relationship between graft hybridization and the specificity of heredity in fruit trees on the basis of introducing the recent achievements in plant graft hybridization. We propose that genetic materials in rootstock being translocated and integrated into the genome of the germ cells and embryonic cells in scion are the main reasons why the majority of the hybrid seedlings have wild properties and the heredity of fruit trees violate Mendel's laws of heredity. The potential of graft hybridization in fruit breeding are also discussed.

The impact of different soil tillage on weed infestation of spring barley in conditions of dryer climatic areas Czech Republic

OpenAIRE

Jan Winkler

2008-01-01

The impact of soil tillage on weeds in spring barley was observed on the field trial. The field trial was established in very warm and dry climatic region (experimental field station in Žabčice, Mendel University of Agriculture and Forestry Brno, Czech Republic). In the experiment there was used 7-strip crop rotation and three variants of soil tillage: conventional tillage (CT), minimum tillage (MT), when soil is shallow loosened and no tillage (NT) what means direct sowing without any soil t...

Resolution of the inverse problem of radioactive decay for the calculation of dose flow rate in radioprotection; Resolution du probleme inverse de la decroissance radioactive pour le calcul de debit de dose en radioprotection

Energy Technology Data Exchange (ETDEWEB)

Bonin, A.; Tsilanizara, A. [CEA Saclay, LIST, DENIDANSIDM2SISERMA, 91 - Gif-sur-Yvette (France)

2010-07-01

The authors present a method for the calculation of the dose equivalent rate which takes main isotopes as well as minority isotopes into account. According to this method, they first calculate the initial composition (before ageing) from what can be observed at a certain time. Then, from this reconstructed initial composition, they complete the isotopic assessment, thus the sources of emitted particles at the same time. The method is implemented in the MENDEL code. Validation is performed with data corresponding to an UOX fuel pin

Generativně množené odrůdy Petunia hybrida s převislým typem růstu

OpenAIRE

Černý, Jakub

2015-01-01

The bechelar thesis was solved in the Department of breeding and propagation of garden plants, Faculty of Horticulture in Lednice, Mendel university in Brno. The experiment was conducted in the cooperation with company Černý, Jaroměř. The aim of this bechelar thesis is to compare the 29 F1 varieties of petunias with the hanging type of growing from seeds. There were evaluated in four imprtant characteristics for growers. Among them belongs -- hanging of branches, shape and heigh of plants, di...

Actividades de Física y Biología con ordenador

OpenAIRE

I. GARCÍA MATEOS; José Manuel VACAS PEÑA

2009-01-01

En este artículo se presentan dos programas de simulación con ordenador para ser aplicados en la enseñanza de las Ciencias Experimentales.El programa Circuitos Eléctricos, permite crear circuitos de corriente continua con diferentes componentes y estudiar la Ley de Ohm y las leyes de las resistencias.El programa Genética simula el cruce de moscas de la especie Drosophila melanogaster y permite estudiar las Leyes de Mendel, ligamiento factorial, entrecruzamiento y la herencia ligada al sexo.

Impact of EU on the internationalization of Czech SMEs in ICT industry

OpenAIRE

Žalman, Jakub

2015-01-01

ŽALMAN, Jakub. Impact of EU on the internationalization of Czech SMEs in ICT in-dustry. Diploma thesis. Mendel University in Brno, 2015. The topic of this diploma thesis is how is the fact that Czech Republic is member of the EU influencing internationalization of Czech SMEs operating in ICT industry. EU has opened and unified the internal market a lot which gave new possibilities of internationalization for member countries. Importance of the topic is also given by the facts that small and m...

Variations of Indian monsoon precipitation during the last 32 kyr reflected in the surface hydrography of the Western Bay of Bengal

Digital Repository Service at National Institute of Oceanography (India)

Govil, P.; Naidu, P.D.

sub-continent. To increase the accuracy of monsoon forecasting one need to understand the variability of monsoon rainfall at different time scales from decadal, centennial and millennial time scales. Several researchers have studied...

[Study on the resilience internal factors in a sample of Puerto Rican centenarians].

Science.gov (United States)

Rosado-Medina, José J; Rodríguez-Gómez, José R; Altieri-Ramirez, Gladys

2012-01-01

Old age is a stage that is usually characterized by lost at the physiological, psychological and social level that generates much distress to individuals. However, the centenaries have been identified as an example of successful aging, within other factors, because they have adequate managed skills that help them to deal with healthy normal losses. Resilience could be one of the factors that may help the Centennials to age successfully. It is necessary more studies with Puerto Rico Centennials since we lack such investigations. This study has an expo facto design; in addition we evaluate psychometrically the Symptoms Check List 90-R (SCL-90-R). The scale of Internal Resilience Factors (EFIR), a semi structured interview and the SCL-90-R were used to identify factors associated with successful aging in the centennials. In addition we explore if there exist gender differences in internal factors of resilience within the sample. 23 Centennials, 15 men and 8 women, of different parts of Puerto Rico (average age = 101. 5 years). Internal resilience factors associated with the aging process were identifying, those were: emotional stability, optimism, behavioral factor and behavioral and emotional skills component. These factors are consistent with the revised literature on positive emotions and adaptive ageing. On the other hand, no statistically significant difference was identified (p <. 05) for the internal factors of resilience on the basis of gender, a finding agreed with the revised literature. The multiple tests administered showed adequate internal consistency (EFIR: (=. 726); SCL-90-R: (=. 941). The Symptoms Check list 90-R (SCL-90-R) was valid with a Cronbach's alpha of. 941. We identified internal resilience factors that could be linked with successfully aging: those factors are encouraging the elderly population. In addition used tests showed adequate internal consistency. Limitations in relation to the size of the sample and the distribution of gender were

Ocean response to volcanic eruptions in Coupled Model Intercomparison Project 5 simulations

KAUST Repository

Ding, Yanni; Carton, James A.; Chepurin, Gennady A.; Stenchikov, Georgiy L.; Robock, Alan; Sentman, Lori T.; Krasting, John P.

2014-01-01

on decadal to centennial timescales. Regional ocean responses vary, although there is some consistent hemispheric asymmetry associated with the hemisphere in which the eruption occurs. Temperature decreases and salinity increases contribute to an increase

South Asian summer monsoon variability during the last ~54 kyrs inferred from surface water salinity and river run off proxies

Digital Repository Service at National Institute of Oceanography (India)

Gebregiorgis, D.; Hathorne, E.C.; Sijinkumar, A.V.; Nath, B.N.; Nurnberg, D.; Frank, M.

; Viswambharan and Mohanakumar, 2014). Decadal to centennial scale variations in monsoon precipitation have been in phase with temperature fluctuations in northern high latitudes(Fleitmann et al., 2003). Monsoonal changes on millennial to longer time...

South African Journal of Geomatics, Vol. 3, No. 2, August 2014 145 ...

African Journals Online (AJOL)

Charles Otunga (212558378)

mitigating related implications like those associated with climate change. ... In this study we determine and predict the influence of LULC transformation ... availability in the supplier's archives, amount of cloud cover and centennial or near.

Art in Venezuela during the Centenary of its Independence, 1910-1911

Directory of Open Access Journals (Sweden)

Roldán Esteva-Grillet

2010-07-01

Full Text Available The commemoration of the centenary of Venezuela's independence strengthened in the people the idea of finally having reached an environment of peace and harmony, and of reunion with past glories. Official initiatives favoring the arts necessarily chose the path of exalting patriotic values through public monuments following classical standards.  The Centennial was probably the highest point in this academic tradition rejected by youths,  but useful to official institutions, so the success of two artists is not casual: sculptor  Eloy Palacios with his Monument to Carabobo in 1911, and painter Tito Salas with his Bolivarian Triptych in the same year. Most of the public artistic heritage commissioned for the centennial still adorns the capital, but the artists’ contribu- tion has not yet been fully assessed.

From Darwin's Origin of Species toward a theory of natural history.

Science.gov (United States)

Boero, Ferdinando

2015-01-01

Darwin is the father of evolutionary theory because he identified evolutionary patterns and, with Natural Selection, he ascertained the exquisitely ecological ultimate processes that lead to evolution. The proximate processes of evolution he proposed, however, predated the discovery of genetics, the backbone of modern evolutionary theory. The later discovery of the laws of inheritance by Mendel and the rediscovery of Mendel in the early 20th century led to two reforms of Darwinism: Neo-Darwinism and the Modern Synthesis (and subsequent refinements). If Darwin's evolutionary thought required much refinement, his ecological insight is still very modern. In the first edition of The Origin of Species, Darwin did not use either the word "evolution" or the word "ecology". "Ecology" was not coined until after the publication of the Origin. Evolution, for him, was the origin of varieties, then species, which he referred to as well-marked varieties, whereas, instead of using ecology, he used "the economy of nature". The Origin contains a high proportion of currently accepted ecological principles. Darwin labelled himself a naturalist. His discipline (natural history) was a blend of ecology and evolution in which he investigated both the patterns and the processes that determine the organization of life. Reductionist approaches, however, often keep the two disciplines separated from each other, undermining a full understanding of natural phenomena that might be favored by blending ecology and evolution through the development of a modern Theory of Natural History based on Darwin's vision of the study of life.

Evaluation of workplace quality - A method for improvement and further development of workplace design for the future

OpenAIRE

Schjølberg, Trine Eide

2012-01-01

Background for Master’s Thesis Research Most of the workspace inhabited by people today were developed in and according to work needs in a time when the pace and character of changes in work were much less pronounced than they are today (McGregor & Then, 1991). Innovative thinking in office design is once again changing the way we think about our workspace, on a level not experienced since the end of the nineteenth century. Duffy (1997) states that the way people work in their ...

Organizational Behaviour in 21st Century – ‘Theory A’ for Managing People for Performance

OpenAIRE

Aithal, Sreeramana; Kumar, Suresh

2016-01-01

Theory X, Theory Y and Theory Z in organizational behaviour (OB) are related to human motivation and management. Theory X and Y were coined by Douglas McGregor in the late 1960s, says that the average human being is lazy and self-centred, lacks ambition, dislikes change, and longs to be told what to do. The corresponding managerial approach emphasizes total control. Theory Y maintains that human beings are active rather than passive shapers of themselves and of their environment. They long to...

Multi-scale climate modelling over Southern Africa using a variable-resolution global model

CSIR Research Space (South Africa)

Engelbrecht, FA

2011-12-01

Full Text Available -mail: fengelbrecht@csir.co.za Multi-scale climate modelling over Southern Africa using a variable-resolution global model FA Engelbrecht1, 2*, WA Landman1, 3, CJ Engelbrecht4, S Landman5, MM Bopape1, B Roux6, JL McGregor7 and M Thatcher7 1 CSIR Natural... improvement. Keywords: multi-scale climate modelling, variable-resolution atmospheric model Introduction Dynamic climate models have become the primary tools for the projection of future climate change, at both the global and regional scales. Dynamic...

Use and application of accelerated pavement testing in pavement preservation research

CSIR Research Space (South Africa)

Steyn, WJVDM

2009-09-01

Full Text Available Centennial Chair in Engineering, University of Texas, Austin Executive Director: Robert E. Skinner, Jr., Transportation Research Board TRANSPORTATION RESEARCH BOARD 2009–2010 TECHNICAL ACTIVITIES COUNCIL Chair: Robert C. Johns, Director, Center...

Spectropolarimetric observations of an arch filament system with the GREGOR solar telescope

Czech Academy of Sciences Publication Activity Database

Balthasar, H.; Gömöry, P.; Gonzalez Manrique, S. J.; Kuckein, C.; Kavka, J.; Kučera, A.; Schwartz, P.; Vašková, R.; Berkefeld, T.; Collados Vera, M.; Denker, C.; Feller, A.; Hofmann, A.; Lagg, A.; Nicklas, H.; Orozco Suárez, D.; Pastor Yabar, A.; Schlichenmaier, R.; Schmidt, D.; Schmidt, W.; Sigwarth, M.; Sobotka, Michal; Solanki, S.K.; Soltau, D.; Staude, J.; Strassmeier, K.G.; Volkmer, R.; von der Lühe, O.; Waldmann, T.A.

2016-01-01

Roč. 337, č. 10 (2016), s. 1050-1056 ISSN 0004-6337. [Dynamic Sun - Exploring the Many Facets of Solar Eruptive Events. Potsdam, 26.10.2015-29.10.2015] Institutional support: RVO:67985815 Keywords : Sun * filaments * photosphere Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 0.916, year: 2016

Actividades de Física y Biología con ordenador

Directory of Open Access Journals (Sweden)

I. GARCÍA MATEOS

2009-12-01

Full Text Available En este artículo se presentan dos programas de simulación con ordenador para ser aplicados en la enseñanza de las Ciencias Experimentales.El programa Circuitos Eléctricos, permite crear circuitos de corriente continua con diferentes componentes y estudiar la Ley de Ohm y las leyes de las resistencias.El programa Genética simula el cruce de moscas de la especie Drosophila melanogaster y permite estudiar las Leyes de Mendel, ligamiento factorial, entrecruzamiento y la herencia ligada al sexo.

Mejora, parametrización y montaje de una impresora 3D

OpenAIRE

Borderia Rojo, Daniel

2014-01-01

L’objectiu d’aquest treball és estudiar la relació que tenen les velocitats dels eixos de la impresora amb respecte la velocitat de sortida del plàstic per l’extrusor en una impresora 3D Prusa Mendel IT1. Això s’aconsegueix analitzant l’efecte que té canviar el factor d’impresió de l’extrusor. Per a poder desenvolupar aquest estudi es realitzaran les següents tasques, que es troben detalladles en la memoria del projecte: - Estudi del funcionament de les noves tecnologies de ...

Faktory kvality v službách vinárskej turistiky v Českej republike

OpenAIRE

Jánošová, Simona

2015-01-01

Jánošová, S. Factors of quality in wine tourism services in Czech Republic. Bachelor thesis. Brno: Mendel University in Brno, 2015. Thesis deals with investigation of the factors of quality in the service of wine tourism. Aim of this study is to compare the factors affecting the level of service quality wine tourism from an visitor point of view and from companies doing business in this area point of view. I implement the proposals for improving the quality of services for companies of wine t...

Contactless sub-millimeter displacement measurements

Science.gov (United States)

Sliepen, Guus; Jägers, Aswin P. L.; Bettonvil, Felix C. M.; Hammerschlag, Robert H.

2008-07-01

Weather effects on foldable domes, as used at the DOT and GREGOR, are investigated, in particular the correlation between the wind field and the stresses caused to both metal framework and tent clothing. Camera systems measure contactless the displacement of several dome points. The stresses follow from the measured deformation pattern. The cameras placed near the dome floor do not disturb telescope operations. In the set-ups of DOT and GREGOR, these cameras are up to 8 meters away from the measured points and must be able to detect displacements of less than 0.1 mm. The cameras have a FireWire (IEEE1394) interface to eliminate the need for frame grabbers. Each camera captures 15 images of 640 × 480 pixels per second. All data is processed on-site in real-time. In order to get the best estimate for the displacement within the constraints of available processing power, all image processing is done in Fourier-space, with all convolution operations being pre-computed once. A sub-pixel estimate of the peak of the correlation function is made. This enables to process the images of four cameras using only one commodity PC with a dual-core processor, and achieve an effective sensitivity of up to 0.01 mm. The deformation measurements are well correlated to the simultaneous wind measurements. The results are of high interest to upscaling the dome design (ELTs and solar telescopes).

Born-Infeld Nonlinear Electrodynamics

International Nuclear Information System (INIS)

Bialynicki-Birula, I.

1999-01-01

This is only a summary of a lecture delivered at the Infeld Centennial Meeting. In the lecture the history of the Born-Infeld nonlinear electrodynamics was presented and some general features of the theory were discussed. (author)

Recent research in earth structure, earthquake and mine seismology, and seismic hazard evaluation in South Africa

CSIR Research Space (South Africa)

Wright, C

2003-07-01

Full Text Available of earthquakes, earthquake hazard and earth structure in South Africa was prepared for the centennial handbook of the Interna- tional Association of Seismology and the Physics of the Earth?s Interior(IASPEI).3 Referencestothesescompletedinthelastfour...

COBE-SST2 Sea Surface Temperature and Ice

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — A new sea surface temperature (SST) analysis on a centennial time scale is presented. The dataset starts in 1850 with monthly 1x1 means and is periodically updated....

??ndice num??rico de un espacio de Banach

OpenAIRE

Mart??n Su??rez, Miguel

2000-01-01

El ??ndice num??rico de un espacio de Banach se define como la mayor constante de equivalencia entre el radio num??rico y la norma usual en el ??lgebra de todos los operadores lineales y continuos sobre ??l. Este concepto fue introducido por G. Lumer en 1968, y estudiado por matem??ticos como F. Bonsall, J. Duncan, C. McGregor, J. Pryce y A. White. En la tesis se hace un estudio sistem??tica de este concepto. Por una parte, se estudia el comportamiento del ??ndice num??ri...

The abrupt onset of the modern South Asian monsoon winds

Digital Repository Service at National Institute of Oceanography (India)

Betzler, C.; Eberli, G.P.; Kroon, D.; Wright, J.D.; Swart, P.K.; Nath, B.N.; Alvarez-Zarikian, C.A.; Alonso-Garcia, M.; Bialik, O.M.; Blattler, C.L.; Guo, J.; Haffen, S.; Horozal, S.; Inoue, M.; Jovane, L.; Lanci, L.; Laya, J.C.; Mee, A.L.H.; Ludmann, T.; Nakakuni, M.; Niino, K.; Petruny, L.M.; Pratiwi, S.D.; Reijmer, J.J.G.; Reolid, J.; Slagle, A.L.; Sloss, C.R.; Su, X.; Yao, Z.; Young, J.R.

:29838 | DOI: 10.1038/srep29838 www.nature.com/scientificreports The abrupt onset of the modern South Asian Monsoon winds Christian Betzler1, Gregor P. Eberli2, Dick Kroon3, James D. Wright4, Peter K. Swart2, Bejugam Nagender Nath5, Carlos A. Alvarez....betzler@uni-hamburg.de) Received: 25 April 2016 accepted: 21 June 2016 Published: 20 July 2016 OPEN www.nature.com/scientificreports/ 2Scientific RepoRts | 6:29838 | DOI: 10.1038/srep29838 control, and we propose that the post Miocene Climate Optimum cooling, together...

DNA barcoding as a screening tool for cryptic diversity

DEFF Research Database (Denmark)

Huemer, Peter; Karsholt, Ole; Mutanen, Marko

2014-01-01

We explore the potential value of DNA barcode divergence for species delimitation in the genus Caryocolum Gregor & Povolný, 1954 (Lepidoptera, Gelechiidae), based on data from 44 European species (including 4 subspecies). Low intraspecific divergence of the DNA barcodes of the mtCOI (cytochrome c...... oxidase 1) gene and/or distinct barcode gaps to the nearest neighbor support species status for all examined nominal taxa. However, in 8 taxa we observed deep splits with a maximum intraspecific barcode divergence beyond a threshold of 3%, thus indicating possible cryptic diversity. The taxonomy...

Notas sobre o fim da ideologia em: o que fazer em caso de incêndio?

Directory of Open Access Journals (Sweden)

Montardo, Sandra Portella

2003-01-01

Full Text Available “Não se trata mais de uma questão de direita e de esquerda. Hoje há os que fracassaram e os que se venderam para o sistema”. Essa frase pronunciada pelo detetive de polícia Manowsky (Klaus Löwitsch algemado pelo “subversivo” Grupo 36, liderado por Tim (Til Schweiger, dentro da prisão de Berlim, bem poderia ser a sinopse de O que fazer em caso de incêndio? (Was tun, wenn’s brennt?, Gregor Schnitzler, 102 minutos, ALE/2002

Proposed Expansion of German Air Force Operations at Holloman AFB, New Mexico, Environmental Impact Statement. Volume 2: Public Hearing Transcripts and Responses to Comments

Science.gov (United States)

1998-04-01

Ca6 44 m4 I 4s 6i 0 A0 C 4 0 0 6 6 6 a 4 6 0 I. wIw 6 3 .406 4 0 0 0 0 . a a4 .0 .4 In 4 5 6 1 A 6 0 0 I 4 5 0 4 1 V 4 4 0 0A 41 6 4 0 4 .2. A 54 4 0...some rural and recre- irget complex at McGregor Range Utilities - Increased demand for water, wastewater treatment , )treas of the range. solid waste

The Effects of Rare Earth Doping on Gallium Nitride Thin Films

Science.gov (United States)

2011-09-01

capture in a solid state device,” Journal of Physics D: Applied Physics, vol. 43, p. 075502, 2010. [28] D. S. McGregor, M. F. Ohmes , R. E. Ortiz, A. S...1044, 1964. [5] M. Cardona and L. Ley , Photoemission in Solids: General Principles. Springer- Verlag New York, 1978. [6] C. Cohen-Tannoudji, B. Diu...A, vol. 50, no. 6, pp. 449–450, 1975. [46] L. Ley , R. A. Pollak, F. R. McFeely, S. P. Kowalczyk, and D. A. Shirley, “Total valence-band densities of