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Sample records for karl fisher titration

  1. Simple Modification of Karl-Fischer Titration Method for Determination of Water Content in Colored Samples

    OpenAIRE

    Eva Tavčar; Erika Turk; Samo Kreft

    2012-01-01

    The most commonly used technique for water content determination is Karl-Fischer titration with electrometric detection, requiring specialized equipment. When appropriate equipment is not available, the method can be performed through visual detection of a titration endpoint, which does not enable an analysis of colored samples. Here, we developed a method with spectrophotometric detection of a titration endpoint, appropriate for moisture determination of colored samples. The reaction takes p...

  2. Simple Modification of Karl-Fischer Titration Method for Determination of Water Content in Colored Samples

    Science.gov (United States)

    Tavčar, Eva; Turk, Erika; Kreft, Samo

    2012-01-01

    The most commonly used technique for water content determination is Karl-Fischer titration with electrometric detection, requiring specialized equipment. When appropriate equipment is not available, the method can be performed through visual detection of a titration endpoint, which does not enable an analysis of colored samples. Here, we developed a method with spectrophotometric detection of a titration endpoint, appropriate for moisture determination of colored samples. The reaction takes place in a sealed 4 ml cuvette. Detection is performed at 520 nm. Titration endpoint is determined from the graph of absorbance plotted against titration volume. The method has appropriate reproducibility (RSD = 4.3%), accuracy, and linearity (R 2 = 0.997). PMID:22567558

  3. Simple Modification of Karl-Fischer Titration Method for Determination of Water Content in Colored Samples

    Directory of Open Access Journals (Sweden)

    Eva Tavčar

    2012-01-01

    Full Text Available The most commonly used technique for water content determination is Karl-Fischer titration with electrometric detection, requiring specialized equipment. When appropriate equipment is not available, the method can be performed through visual detection of a titration endpoint, which does not enable an analysis of colored samples. Here, we developed a method with spectrophotometric detection of a titration endpoint, appropriate for moisture determination of colored samples. The reaction takes place in a sealed 4 ml cuvette. Detection is performed at 520 nm. Titration endpoint is determined from the graph of absorbance plotted against titration volume. The method has appropriate reproducibility (RSD=4.3%, accuracy, and linearity (2=0.997.

  4. Simple modification of karl-Fischer titration method for determination of water content in colored samples.

    Science.gov (United States)

    Tavčar, Eva; Turk, Erika; Kreft, Samo

    2012-01-01

    The most commonly used technique for water content determination is Karl-Fischer titration with electrometric detection, requiring specialized equipment. When appropriate equipment is not available, the method can be performed through visual detection of a titration endpoint, which does not enable an analysis of colored samples. Here, we developed a method with spectrophotometric detection of a titration endpoint, appropriate for moisture determination of colored samples. The reaction takes place in a sealed 4 ml cuvette. Detection is performed at 520 nm. Titration endpoint is determined from the graph of absorbance plotted against titration volume. The method has appropriate reproducibility (RSD = 4.3%), accuracy, and linearity (R(2) = 0.997).

  5. Reference test methods for total water in lint cotton by Karl Fischer Titration and low temperature distillation

    Science.gov (United States)

    In a study of comparability of total water contents (%) of conditioned cottons by Karl Fischer Titration (KFT) and Low Temperature Distillation (LTD) reference methods, we demonstrated a match of averaged results based on a large number of replications and weighing the test specimens at the same tim...

  6. Reference method for total water in lint cotton by automated oven drying combined with volumetric Karl Fischer titration

    Science.gov (United States)

    In a preliminary study to measure total water in lint cotton we demonstrated that volumetric Karl Fischer Titration of moisture transported by a carrier gas from an attached small oven is more accurate than standard oven drying in air. The objective of the present study was to assess the measuremen...

  7. Determination of the analytical performance of a headspace capillary gas chromatographic technique and karl Fischer coulometric titration by system calibration using oil samples containing known amounts of moisture.

    Science.gov (United States)

    Jalbert, J; Gilbert, R; Tétreault, P

    1999-08-01

    Over the past few years, concerns have been raised in the literature about the accuracy of the Karl Fischer (KF) method for assessing moisture in transformer mineral oils. To better understand this issue, the performance of a static headspace capillary gas chromatographic (HS-CGC) technique was compared to that of KF coulometric titration by analyzing moisture in samples containing known amounts of water and various samples obtained from the National Institute of Standards and Technology (NIST). Two modes of adding samples into the KF vessel were used:  direct injection and indirect injection via an azeotropic distillation of the moisture with toluene. Under the conditions used for direct injection, the oil matrix was totally dissolved in the anolyte, which allowed the moisture to be titrated in a single-phase solution rather than in a suspension. The results have shown that when HS-CGC and combined azeotropic distillation/KF titration are calibrated with moisture-in-oil standards, a linear relation is observed over 0-60 ppm H(2)O with a correlation coefficient better than 0.9994 (95% confidence), with the regression line crossing through zero. A similar relation can also be observed when calibration is achieved by direct KF addition of standards prepared with octanol-1, but in this case an intercept of 4-5 ppm is noted. The amount of moisture determined by curve interpolation in NIST reference materials by the three calibrated systems ranges from 13.0 to 14.8 ppm for RM 8506 and 42.5 to 46.4 ppm for RM 8507, and in any case, the results were as high as those reported in the literature with volumetric KF titration. However, titration of various dehydrated oil and solvent samples showed that direct KF titration is affected by a small bias when samples contain very little moisture. The source of error after correction for the large sample volume used for the determination (8 mL) is about 6 ppm for Voltesso naphthenic oil and 4 ppm for toluene, revealing a matrix

  8. Karl Marx

    Directory of Open Access Journals (Sweden)

    Rosa Luxemburg

    2018-05-01

    Full Text Available Marx died on March 14, 1883. Exactly twenty years later, on March 14, 1903, Rosa Luxemburg’s reflections on Karl Marx were published in German in Vorwärts, the newspaper of the Social Democratic Party of Germany. tripleC publishes an English translation of Luxemburg’s essay on the occasion of Marx’s bicentenary. Christian Fuchs’ postface “Karl Marx and Rosa Luxemburg” asks the question of how we can make sense of Rosa Luxemburg’s reading of Marx in 2018. Source of the German original: Luxemburg, Rosa. 1903. Karl Marx. Vorwärts 62: 1-2.

  9. Karl Marx

    OpenAIRE

    Rosa Luxemburg

    2018-01-01

    Marx died on March 14, 1883. Exactly twenty years later, on March 14, 1903, Rosa Luxemburg’s reflections on Karl Marx were published in German in Vorwärts, the newspaper of the Social Democratic Party of Germany. tripleC publishes an English translation of Luxemburg’s essay on the occasion of Marx’s bicentenary. Christian Fuchs’ postface “Karl Marx and Rosa Luxemburg” asks the question of how we can make sense of Rosa Luxemburg’s reading of Marx in 2018. Source of the German original: Luxembu...

  10. Comparison study Of H2O determination in UO2 powder by using MEA (Moisture Evaluation Analysis) and KFT (Karl Fischer Titration)

    International Nuclear Information System (INIS)

    Farida; Yudhi, N.; Lilis, W.; Putro, P.K.

    2000-01-01

    To find out an analytical method to determine H 2 O content in UO 2 powder as fuel elements of power reactors which is simple, economical, precise, and accurate, it is necessary to do comparison study of H 2 O content determination using MEA method which is based on electrolysis process with two helically wound electrodes which contains P 2 O 5 that has function to absorb water steam. The platinum electrodes have a 67 Volt potential on them. The quantity of charge required to electrolyse 0.1 μgr of H 2 O is a constant which is the basic of the electronic measurement. In KFT method is based on volumetric titration using the one component reagent hydronol composite contain all reactants i.e. iodine, sulfur dioxide and imidazole as the base, dissolved in a suitable alcohol. The t- (student) test show that there is no different result significantly between those method. The H 2 O contain obtained is 0.956±0.0095 %, for MEA method and 0.953±0.023 % for KFT method. (author)

  11. [Karl Sudhoff].

    Science.gov (United States)

    Kästner, Ingrid

    2013-01-01

    In 1914, from 6th May to 18th October, the International Exposition of book Industry and Graphic Arts (BUGRA) took place in Leipzig, then the world capital of books. Karl Sudhoff, director of the Leipzig Institute of the History of Medicine, was appointed by the executive committee of the BURGA to organize the special exhibition "Three Millennia of Graphic Arts in the Service of Science". The paper shows, following Sudhoff's own descriptions and new archival sources, the conceptual design and the contents of this exposition set up by Sudhoff.

  12. Comparison study Of H{sub 2}O determination in UO{sub 2} powder by using MEA (Moisture Evaluation Analysis) and KFT (Karl Fischer Titration); Studi banding penentuan kadar H{sub 2}O dalam serbuk UO{sub 2} menggunakan metoda MEA (Moisture Evaluation Analysis) dan KFT (Karl Fischer Titration)

    Energy Technology Data Exchange (ETDEWEB)

    Farida,; Yudhi, N; Lilis, W; Putro, P K [Center for Development of Nuclear Fuel and Recycling Technology, National Atomic Energy Agency, Serpong (Indonesia)

    2000-03-08

    To find out an analytical method to determine H{sub 2}O content in UO{sub 2} powder as fuel elements of power reactors which is simple, economical, precise, and accurate, it is necessary to do comparison study of H{sub 2}O content determination using MEA method which is based on electrolysis process with two helically wound electrodes which contains P{sub 2} O{sub 5} that has function to absorb water steam. The platinum electrodes have a 67 Volt potential on them. The quantity of charge required to electrolyse 0.1 {mu}gr of H{sub 2}O is a constant which is the basic of the electronic measurement. In KFT method is based on volumetric titration using the one component reagent hydronol composite contain all reactants i.e. iodine, sulfur dioxide and imidazole as the base, dissolved in a suitable alcohol. The t- (student) test show that there is no different result significantly between those method. The H{sub 2}O contain obtained is 0.956{+-}0.0095 %, for MEA method and 0.953{+-}0.023 % for KFT method. (author)

  13. Karl Heinrich Ulrichs

    DEFF Research Database (Denmark)

    Heede, Dag

    2017-01-01

    Introduktion til juristen og homopioneren Karl Heinrich Ulrichs (1824-1882) og hans fortælling "Manor" (1885)......Introduktion til juristen og homopioneren Karl Heinrich Ulrichs (1824-1882) og hans fortælling "Manor" (1885)...

  14. Karl Marx' glemte arvtager

    DEFF Research Database (Denmark)

    Jakobsen, Uffe

    1988-01-01

    For 50 år siden hyldede avisen 'Social-Demokraten' Karl Kautsky (1854-1938) som "den største Tænker inden for den socialdemokratiske Arbejderbevægelse". I perioden fra Friedrich Engels' død i 1895 til 1. Verdenskrigs udbrud i 1914 blev Karl Kautsky alment anset som Karl Marx's arvtager inden...

  15. LIGHT TITRATIONS

    Science.gov (United States)

    Field, John; Baas-Becking, Lourens G. M.

    1926-01-01

    1. The usefulness of the radiomicrometer in titration work has been pointed out. The authors suggest that light titration may also be used where a reaction mixture changes its absorption in the (near) infra-red. 2. The applicability of this method to the starch-iodine reaction has been demonstrated. PMID:19872266

  16. Karl Lagerfeld obidelsja

    Index Scriptorium Estoniae

    2006-01-01

    Moekunstnik Karl Lagerfeld kaebas kohtusse raamatu "The Beautiful Fall : Fashion, Genius and Glorious Excess in 1970s Paris" autori Alicia Drake'i. Raamat räägib Lagerfeldi noorusajast ja tema konkurentsist moekunstnik Yves Saint Laurent'iga 1970. aastate Pariisis

  17. Karl Ristikivi prantsuse keeles

    Index Scriptorium Estoniae

    2003-01-01

    29. ja 30. mail Tallinna Kirjanike Majas ja 31. mail Tartu Kirjanduse Majas esinevad näitlejad Ene Rämmeld ja Claude Merlin Karl Ristikivi luulekavaga "Inimese teekond" (tõlkija Tarah Montbélialtz). Vt. ka Looming, 2003, nr. 6, lk. 953

  18. MOISTURE IN COTTON BY THE KARL FISCHER TITRATION REFERENCE METHOD

    Science.gov (United States)

    Moisture is a critical parameter that influences many aspects of cotton fiber from harvesting and ginning to various fiber properties. Because of their importance, reference moisture methods that are more accurate than the existing oven-drying techniques and relatively easy to generate results are ...

  19. Sir Karl Popper and Education

    Science.gov (United States)

    McNamara, D. R.

    1978-01-01

    Sir Karl Popper is one of England's most distinguished contemporary philosophers and it is surprising that his thought has not permeated and informed educational discussion. This paper suggests that educationists have much to learn from Karl Popper's writings and explores ways in which his ideas can illuminate and advance discussion about…

  20. Fisher Matrix Preloaded — FISHER4CAST

    Science.gov (United States)

    Bassett, Bruce A.; Fantaye, Yabebal; Hlozek, Renée; Kotze, Jacques

    The Fisher Matrix is the backbone of modern cosmological forecasting. We describe the Fisher4Cast software: A general-purpose, easy-to-use, Fisher Matrix framework. It is open source, rigorously designed and tested and includes a Graphical User Interface (GUI) with automated LATEX file creation capability and point-and-click Fisher ellipse generation. Fisher4Cast was designed for ease of extension and, although written in Matlab, is easily portable to open-source alternatives such as Octave and Scilab. Here we use Fisher4Cast to present new 3D and 4D visualizations of the forecasting landscape and to investigate the effects of growth and curvature on future cosmological surveys. Early releases have been available at since mid-2008. The current release of the code is Version 2.2 which is described here. For ease of reference a Quick Start guide and the code used to produce the figures in this paper are included, in the hope that it will be useful to the cosmology and wider scientific communities.

  1. Karl Popper's Quantum Ghost

    Science.gov (United States)

    Shields, William

    2004-05-01

    Karl Popper, though not trained as a physicist and embarrassed early in his career by a physics error pointed out by Einstein and Bohr, ultimately made substantial contributions to the interpretation of quantum mechanics. As was often the case, Popper initially formulated his position by criticizing the views of others - in this case Niels Bohr and Werner Heisenberg. Underlying Popper's criticism was his belief that, first, the "standard interpretation" of quantum mechanics, sometimes called the Copenhagen interpretation, abandoned scientific realism and second, the assertion that quantum theory was "complete" (an assertion rejected by Einstein among others) amounted to an unfalsifiable claim. Popper insisted that the most basic predictions of quantum mechanics should continue to be tested, with an eye towards falsification rather than mere adding of decimal places to confirmatory experiments. His persistent attacks on the Copenhagen interpretation were aimed not at the uncertainty principle itself and the formalism from which it was derived, but at the acceptance by physicists of an unclear epistemology and ontology that left critical questions unanswered. In 1999, physicists at the University of Maryland conducted a version of Popper's Experiment, re-igniting the debate over quantum predictions and the role of locality in physics.

  2. Chapter 3: Fisher

    Science.gov (United States)

    Roger A. Powell; William J. Zielinski

    1994-01-01

    The fisher (Martes pennanti) is a medium-size mammalian carnivore and the largest member of the genus Martes (Anderson 1970) of the family Mustelidae in the order Carnivora. The genus Martes includes five or six other extant species. The fisher has the general body build of a stocky weasel and is long, thin, and...

  3. Thermometric titration of sulphate.

    Science.gov (United States)

    Williams, M B; Janata, J

    1970-06-01

    Direct thermometric titration of sulphate with a solution of barium perchlorate is proposed. The stoichiometry of the titration is shown to be critically dependent on the concentration of ethanol in the titration medium. The titration is rapid and suffers from only a few interferences.

  4. In memoriam : Karl R. Popper

    Directory of Open Access Journals (Sweden)

    Cecilia Tohăneanu

    2014-04-01

    Full Text Available Dedicated to Karl Popper’s memory, this essay aims at following the echo of his critical rationalism and how it has been received by Mario Bunge, one of the most prominent contemporary philosopher of science – an admirer, later a critic of Popper’s social and political philosophy. The main goal of such an endeavor is to find out where could have been Popper wrong – from Bunge’s view point – and take note of the arguments of both of them, thus hoping to get closer to the truth, as Sir Karl said.

  5. Sõrmuste isand Karl Fritsch / Merike Alber

    Index Scriptorium Estoniae

    Alber, Merike

    2008-01-01

    Saksa ehtekunstniku Karl Fritschi (sünd. 1963) näitus "Metrosideros robusta. Ehted" Eesti Tarbekunsti- ja Disainimuuseumis kuni 29. VI. Karl Fritsch pälvis 2006. a. Francoise van den Boschi (hollandi ehtekunstnik, 1944-1977) auhinna, 1995. ja 2007. a. Herbert Hoffmanni preemia. Darling Publications kirjastas Karl Fritschist raamatud "Metrosideros Robusta" ja "Baby Brick"

  6. Karl Marx 1864 og forsigtighedsprincippet

    DEFF Research Database (Denmark)

    Czeskleba-Dupont, Rolf

    2015-01-01

    Artiklen analyserer divergerende versioner af den tekst, som Karl Marx efter dannelsen af den 1.Internationale Arbejderassociation i London september 1864 har oversat fra sit engelske original (Inaugural Address...), der udkom i november, til en tysk version med overskriften 'Manifest an die...

  7. Karl Marx and the Environment

    Science.gov (United States)

    Shifferd, K. D.

    1972-01-01

    Implications from Karl Marx's concept of nature are explored. Serving as a frame of reference for the fight against pollution, the Marxian philosophy provides a kind of systems analysis of the origins and dynamics of pollution at the level of society and a set of conceptual tools and attitudes for unmasking the claims of industry. (BL)

  8. Karl Ove Knausgaard's My Struggle

    DEFF Research Database (Denmark)

    Schmitt, Arnaud; Kjerkegaard, Stefan

    2016-01-01

    In this study of Karl Ove Knausgaard’s My Struggle, the authors theorize what paratextual information does to one’s reading, especially in autobiography informed literature. Although My Struggle can be read both as memoir and novel, and even as autofiction, Knausgaard is aiming at a higher truth...

  9. Fisher in Adelaide.

    Science.gov (United States)

    Mayo, Oliver

    2014-06-01

    R. A. Fisher spent much of his final 3 years of life in Adelaide. It was a congenial place to live and work, and he was much in demand as a speaker, in Australia and overseas. It was, however, a difficult time for him because of the sustained criticism of fiducial inference from the early 1950s onwards. The article discusses some of Fisher's work on inference from an Adelaide perspective. It also considers some of the successes arising from this time, in the statistics of field experimentation and in evolutionary genetics. A few personal recollections of Fisher as houseguest are provided. This article is the text of a article presented on August 31, 2012 at the 26th International Biometric Conference, Kobe, Japan. © 2014, The International Biometric Society.

  10. Generalisations of Fisher Matrices

    Directory of Open Access Journals (Sweden)

    Alan Heavens

    2016-06-01

    Full Text Available Fisher matrices play an important role in experimental design and in data analysis. Their primary role is to make predictions for the inference of model parameters—both their errors and covariances. In this short review, I outline a number of extensions to the simple Fisher matrix formalism, covering a number of recent developments in the field. These are: (a situations where the data (in the form of ( x , y pairs have errors in both x and y; (b modifications to parameter inference in the presence of systematic errors, or through fixing the values of some model parameters; (c Derivative Approximation for LIkelihoods (DALI - higher-order expansions of the likelihood surface, going beyond the Gaussian shape approximation; (d extensions of the Fisher-like formalism, to treat model selection problems with Bayesian evidence.

  11. Was RA Fisher Right?

    Science.gov (United States)

    Srivastava, Ayush; Srivastava, Anurag; Pandey, Ravindra M

    2017-10-01

    Randomized controlled trials have become the most respected scientific tool to measure the effectiveness of a medical therapy. The design, conduct and analysis of randomized controlled trials were developed by Sir Ronald A. Fisher, a mathematician in Great Britain. Fisher propounded that the process of randomization would equally distribute all the known and even unknown covariates in the two or more comparison groups, so that any difference observed could be ascribed to treatment effect. Today, we observe that in many situations, this prediction of Fisher does not stand true; hence, adaptive randomization schedules have been designed to adjust for major imbalance in important covariates. Present essay unravels some weaknesses inherent in Fisherian concept of randomized controlled trial.

  12. Fisher's Contributions to Statistics

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 2; Issue 9. Fisher's Contributions to Statistics. T Krishnan. General Article Volume 2 Issue 9 September 1997 pp 32-37. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/002/09/0032-0037. Author Affiliations.

  13. Fisher and marten

    Science.gov (United States)

    Roger A. Powell; Steven W. Buskirk; William J. Zielinski

    2003-01-01

    The genus Martes is circumboreal in distribution, with extensions into southern (M. gwatkinsii) and southeast Asia as far as 7°S latitude (M. flavigula; Anderson 1970). The fisher (subgenus Pekania) is endemic to the New World and restricted to mesic coniferous forest of the boreal zone and its...

  14. Fisher's Contributions to Statistics

    Indian Academy of Sciences (India)

    of statistics are multifarious, profound and long-lasting. In fact, he can be ... that it is not even possible to mention them all in this short article. ... At that time the term 'likelihood' as oppo- .... Dedicated to the memory of Fisher soon after his death,.

  15. Thermometric Titration for Rapid Determination of Trace Water in Jet Fuel

    Directory of Open Access Journals (Sweden)

    Jian-Qiang Hu

    2017-01-01

    Full Text Available Water content in jet fuels is detected by thermometric titration (TMT, and the optimal detected system is 2,2-dimethoxypropane as titrant, cyclohexane and isopropanol as titration solvents, and methanesulfonic acid as catalyst in this method. The amounts of oil, concentration and delivery rate of titrant, volumes, and the reliability and accuracy of thermometric titration were emphasized. The results show that the accuracy, validity, and reliability of TMT are excellent by different indicated spiked water contents. The obtained results between TMT and Karl Fischer titration have been proven to be in accord. But, the duration of titration merely spends 3–5 min in the whole process, greatly shortening the detected time. Therefore, rapid and accurate determination of trace water in a jet fuel can be realized by TMT.

  16. [Medical history impressions of Karl Marx 1983].

    Science.gov (United States)

    Kaiser, W

    1983-12-15

    Excerpts of his London era first published on the occasion of the Karl Marx testimonials of 1983 gave rise to extend the memory of the fundamental achievements of Karl Marx to medico-historical aspects. In this case Karl Marx paid special attention to the working and living conditions of the working class and an analysis of his adequate statements and records shows multifarious details which give a research basis also for the history of medicine. Marx and Engels had friendly contacts with several physicians who shared the opinions of the two classics: their way of life is shown in the most important points.

  17. Potentiometric titration of plutonium

    International Nuclear Information System (INIS)

    Silver, G.L.

    1978-01-01

    In the potentiometric titration of plutonium(III), it has been customary to take the equivalence point as the inflection point on a plot of potential vs. volume of titrant. It have not been, however, demonstrated, that the stoichiometric end point corresponds to the inflection point. Suggestions are made according to which these points may not correspond in the potentiometric titration of plutonium(III), as these titrations are ordinarily concluded in a period of time which is short compared to the time required for valence state rearrangement through disproportionation. (T.G.)

  18. Kirjavahetus Kaarel Robert Pustaga / Karl Ast Rumor

    Index Scriptorium Estoniae

    Rumor, Karl, pseud., 1886-1971

    2009-01-01

    Kirjavahetus Rio de Janeiros elava Karl Ast Rumori ja New Yorgis elava Kaarel Robert Pusta vahel Eesti kongressi kokkukutsumise vajalikkuse, väliseesti ühingute ja nõukogude, ajakirjanduse ning üldise poliitilise olukorra teemadel

  19. Karl Konrad Grass jumalainimeste uurijana / Alar Laats

    Index Scriptorium Estoniae

    Laats, Alar

    2006-01-01

    Karl Konrad Grass oli 19. sajandil Dorpati keiserliku ülikooli usuteaduskonna Uue Testamendi õppejõud, kes tegeles hobi korras idakristluse (vene sektid) uurimisega. Tema peateoseks on uurimus "Die russischen Sekten". Ettekanne konverentsil 15.-16. aprill 2005. a.

  20. Automated uranium titration system

    International Nuclear Information System (INIS)

    Takahashi, M.; Kato, Y.

    1983-01-01

    An automated titration system based on the Davies-Gray method has been developed for accurate determination of uranium. The system consists of a potentiometric titrator with precise burettes, a sample changer, an electronic balance and a desk-top computer with a printer. Fifty-five titration vessels are loaded in the sample changer. The first three contain the standard solution for standardizing potassium dichromate titrant, and the next two and the last two contain the control samples for data quality assurance. The other forty-eight measurements are carried out for sixteen unknown samples. Sample solution containing about 100 mg uranium is taken in a titration vessel. At the pretreatment position, uranium (VI) is reduced to uranium (IV) by iron (II). After the valency adjustment, the vessel is transferred to the titration position. The rate of titrant addition is automatically controlled to be slower near the end-point. The last figure (0.01 mL) of the equivalent titrant volume for uranium is calculated from the potential change. The results obtained with this system on 100 mg uranium gave a precision of 0.2% (RSD,n=3) and an accuracy of better than 0.1%. Fifty-five titrations are accomplished in 10 hours. (author)

  1. Karl Kello - elukutse olla saarlane / Aare Laine

    Index Scriptorium Estoniae

    Laine, Aare, 1951-

    2004-01-01

    Kuressaare Kuursaalis näidati kadripäeval nelja Ruta Celma ja Karl Kello kultuuriloolist dokumentaalfilmi : "Narr Jumala kojas" (2000), "Phaetonit otsides" (1999), "Eestlased Lätis" (2004) ja Kalevipoja temaatikat arendav "Küll siis Kalev..." (2004). Filmide operaator on Arvo Vilu. Artikli autor kõneleb Karl Kellost, tema Karja kiriku ja Kaali järve problemaatika arendustest peale filmide ka kirjasõnas

  2. A tutorial on Fisher information

    NARCIS (Netherlands)

    Ly, A.; Marsman, M.; Verhagen, J.; Grasman, R.P.P.P.; Wagenmakers, E.-M.

    2017-01-01

    In many statistical applications that concern mathematical psychologists, the concept of Fisher information plays an important role. In this tutorial we clarify the concept of Fisher information as it manifests itself across three different statistical paradigms. First, in the frequentist paradigm,

  3. Fisher.py: Fisher Matrix Manipulation and Confidence Contour Plotting

    Science.gov (United States)

    Coe, Dan

    2010-10-01

    Fisher.py allows you to combine constraints from multiple experiments (e.g., weak lensing + supernovae) and add priors (e.g., a flat universe) simply and easily. Calculate parameter uncertainties and plot confidence ellipses. Fisher matrix expectations for several experiments are included as calculated by myself (time delays) and the Dark Energy Task Force (WL/SN/BAO/CL/CMB), or provide your own.

  4. Maximal quantum Fisher information matrix

    International Nuclear Information System (INIS)

    Chen, Yu; Yuan, Haidong

    2017-01-01

    We study the existence of the maximal quantum Fisher information matrix in the multi-parameter quantum estimation, which bounds the ultimate precision limit. We show that when the maximal quantum Fisher information matrix exists, it can be directly obtained from the underlying dynamics. Examples are then provided to demonstrate the usefulness of the maximal quantum Fisher information matrix by deriving various trade-off relations in multi-parameter quantum estimation and obtaining the bounds for the scalings of the precision limit. (paper)

  5. Physics with Big Karl Brainstorming. Abstracts

    International Nuclear Information System (INIS)

    Machner, H.; Lieb, J.

    2000-08-01

    Before summarizing details of the meeting, a short description of the spectrometer facility Big Karl is given. The facility is essentially a new instrument using refurbished dipole magnets from its predecessor. The large acceptance quadrupole magnets and the beam optics are new. Big Karl has a design very similar as the focussing spectrometers at MAMI (Mainz), AGOR (Groningen) and the high resolution spectrometer (HRS) in Hall A at Jefferson Laboratory with ΔE/E = 10 -4 but at some lower maximum momentum. The focal plane detectors consisting of multiwire drift chambers and scintillating hodoscopes are similar. Unlike HRS, Big Karl still needs Cerenkov counters and polarimeters in its focal plane; detectors which are necessary to perform some of the experiments proposed during the brainstorming. In addition, BIG KARL allows emission angle reconstruction via track measurements in its focal plane with high resolution. In the following the physics highlights, the proposed and potential experiments are summarized. During the meeting it became obvious that the physics to be explored at Big Karl can be grouped into five distinct categories, and this summary is organized accordingly. (orig.)

  6. Comparison between amperometric and true potentiometric end-point detection in the determination of water by the Karl Fischer method.

    Science.gov (United States)

    Cedergren, A

    1974-06-01

    A rapid and sensitive method using true potentiometric end-point detection has been developed and compared with the conventional amperometric method for Karl Fischer determination of water. The effect of the sulphur dioxide concentration on the shape of the titration curve is shown. By using kinetic data it was possible to calculate the course of titrations and make comparisons with those found experimentally. The results prove that the main reaction is the slow step, both in the amperometric and the potentiometric method. Results obtained in the standardization of the Karl Fischer reagent showed that the potentiometric method, including titration to a preselected potential, gave a standard deviation of 0.001(1) mg of water per ml, the amperometric method using extrapolation 0.002(4) mg of water per ml and the amperometric titration to a pre-selected diffusion current 0.004(7) mg of water per ml. Theories and results dealing with dilution effects are presented. The time of analysis was 1-1.5 min for the potentiometric and 4-5 min for the amperometric method using extrapolation.

  7. Filtrates & Residues: Olfactory Titration.

    Science.gov (United States)

    Wood, John T.; Eddy, Roberta M.

    1996-01-01

    Presents an experiment that uses a unique acid-base indicator--the odor of raw onion--to indicate the end point of the titration of sodium hydroxide with hydrochloric acid. Allows the student to detect the completion of the neutralization reaction by olfaction rather than sight. (JRH)

  8. ''Titration'' polymerization of monovinylacetylene

    NARCIS (Netherlands)

    Mavinkurve, A; Visser, S; vandenBroek, W; Pennings, AJ

    1996-01-01

    A polymer consisting of a saturated carbon backbone with pendent acetylenic groups was prepared from monovinylacetylene. A titration was performed between the monomer and tertiary butyllithium, its lithiating agent. The charge transfer complex formed between the solvent THF and the tertiary

  9. Wright-Fisher diffusion bridges.

    Science.gov (United States)

    Griffiths, Robert C; Jenkins, Paul A; Spanò, Dario

    2017-10-06

    The trajectory of the frequency of an allele which begins at x at time 0 and is known to have frequency z at time T can be modelled by the bridge process of the Wright-Fisher diffusion. Bridges when x=z=0 are particularly interesting because they model the trajectory of the frequency of an allele which appears at a time, then is lost by random drift or mutation after a time T. The coalescent genealogy back in time of a population in a neutral Wright-Fisher diffusion process is well understood. In this paper we obtain a new interpretation of the coalescent genealogy of the population in a bridge from a time t∈(0,T). In a bridge with allele frequencies of 0 at times 0 and T the coalescence structure is that the population coalesces in two directions from t to 0 and t to T such that there is just one lineage of the allele under consideration at times 0 and T. The genealogy in Wright-Fisher diffusion bridges with selection is more complex than in the neutral model, but still with the property of the population branching and coalescing in two directions from time t∈(0,T). The density of the frequency of an allele at time t is expressed in a way that shows coalescence in the two directions. A new algorithm for exact simulation of a neutral Wright-Fisher bridge is derived. This follows from knowing the density of the frequency in a bridge and exact simulation from the Wright-Fisher diffusion. The genealogy of the neutral Wright-Fisher bridge is also modelled by branching Pólya urns, extending a representation in a Wright-Fisher diffusion. This is a new very interesting representation that relates Wright-Fisher bridges to classical urn models in a Bayesian setting. Copyright © 2017 Elsevier Inc. All rights reserved.

  10. Titration Curves: Fact and Fiction.

    Science.gov (United States)

    Chamberlain, John

    1997-01-01

    Discusses ways in which datalogging equipment can enable titration curves to be measured accurately and how computing power can be used to predict the shape of curves. Highlights include sources of error, use of spreadsheets to generate titration curves, titration of a weak acid with a strong alkali, dibasic acids, weak acid and weak base, and…

  11. Karl A. Gschneidner Jr (1930–2016)

    International Nuclear Information System (INIS)

    Pecharsky, Vitalij K.

    2016-01-01

    Presented here is the obituary for Karl Albert Gschneidner Jr. He died on 27 April 2016. Nicknamed Mr Rare Earth, he holds an unparalleled place as the renowned authority in just about every aspect related to the science, technology and history of a very special family of elements — the rare earths.

  12. Some Educational Implications of Karl Marx's Communism

    Science.gov (United States)

    Hellerich, Gert

    1970-01-01

    According to the expressed ideas of Karl Marx, education should be viewed as a means to develop a person's whole potential and to make him a better human being. It is his contention that in a capitalist society, the educational process causes misery and exists solely to further entrench the power of the rich. (CK)

  13. Karl Marx: Critique as Emancipatory Practice

    NARCIS (Netherlands)

    Celikates, R.; de Boer, K.; Sonderegger, R.

    2012-01-01

    Critique of philosophy, critique of religion, critique of politics, critique of political economy - there is almost no sphere of modern society of which Karl Marx’s theory does not offer a critique. This makes it all the more necessary to investigate whether these different critiques possess any

  14. "Fisher v. Texas": Strictly Disappointing

    Science.gov (United States)

    Nieli, Russell K.

    2013-01-01

    Russell K. Nieli writes in this opinion paper that as far as the ability of state colleges and universities to use race as a criteria for admission goes, "Fisher v. Texas" was a big disappointment, and failed in the most basic way. Nieli states that although some affirmative action opponents have tried to put a more positive spin on the…

  15. On Fisher Information and Thermodynamics

    Science.gov (United States)

    Fisher information is a measure of the information obtainable by an observer from the observation of reality. However, information is obtainable only when there are patterns or features to observe, and these only exist when there is order. For example, a system in perfect disor...

  16. Potentiometric titration with polarized electrodes

    International Nuclear Information System (INIS)

    Chikryzova, E.G.

    1977-01-01

    Based on the analysis of the works carried out during 1911-75 consideration is given to the present state of the method of potentiometric titration with polarized electrodes. The material is generalized in the tabular form indicating the elments of interest, titration conditions and the objects to be analyzed. The list and classification of the potentiometric titration methods intended for determining organic and inorganic substances are presented

  17. Fisher Center for Alzheimer's Research Foundation

    Science.gov (United States)

    ... Hear Kent Karosen, President and CEO of the Fisher Center, describe his new book and the power ... Signs of Alzheimer's Clinical Stages of Alzheimer’s About Fisher About Us Board of Trustees Financials Terms of ...

  18. Exact solitary waves of the Fisher equation

    International Nuclear Information System (INIS)

    Kudryashov, Nikolai A.

    2005-01-01

    New method is presented to search exact solutions of nonlinear differential equations. This approach is used to look for exact solutions of the Fisher equation. New exact solitary waves of the Fisher equation are given

  19. Nash Equilibria in Fisher Market

    Science.gov (United States)

    Adsul, Bharat; Babu, Ch. Sobhan; Garg, Jugal; Mehta, Ruta; Sohoni, Milind

    Much work has been done on the computation of market equilibria. However due to strategic play by buyers, it is not clear whether these are actually observed in the market. Motivated by the observation that a buyer may derive a better payoff by feigning a different utility function and thereby manipulating the Fisher market equilibrium, we formulate the Fisher market game in which buyers strategize by posing different utility functions. We show that existence of a conflict-free allocation is a necessary condition for the Nash equilibria (NE) and also sufficient for the symmetric NE in this game. There are many NE with very different payoffs, and the Fisher equilibrium payoff is captured at a symmetric NE. We provide a complete polyhedral characterization of all the NE for the two-buyer market game. Surprisingly, all the NE of this game turn out to be symmetric and the corresponding payoffs constitute a piecewise linear concave curve. We also study the correlated equilibria of this game and show that third-party mediation does not help to achieve a better payoff than NE payoffs.

  20. Atomic Fisher information versus atomic number

    International Nuclear Information System (INIS)

    Nagy, A.; Sen, K.D.

    2006-01-01

    It is shown that the Thomas-Fermi Fisher information is negative. A slightly more sophisticated model proposed by Gaspar provides a qualitatively correct expression for the Fisher information: Gaspar's Fisher information is proportional to the two-third power of the atomic number. Accurate numerical calculations show an almost linear dependence on the atomic number

  1. Incentive Ratios of Fisher Markets

    DEFF Research Database (Denmark)

    Chen, Ning; Deng, Xuaitue; Zhang, Hongyang

    2012-01-01

    In a Fisher market, a market maker sells m items to n potential buyers. The buyers submit their utility functions and money endowments to the market maker, who, upon receiving submitted information, derives market equilibrium prices and allocations of its items. While agents may benefit...... by misreporting their private information, we show that the percentage of improvement by a unilateral strategic play, called incentive ratio, is rather limited—it is less than 2 for linear markets and at most $e^{1/e}\\thickapprox 1.445$ for Cobb-Douglas markets. We further prove that both ratios are tight....

  2. 'Doing theology as though nothing had happened' – reading Karl ...

    African Journals Online (AJOL)

    'Doing theology as though nothing had happened' – reading Karl Barth's confessional theology in Zimbabwe today? ... This article will attempt to argue that this theology can contribute to the Reformed theology in present day Zimbabwe. It will therefore attempt to introduce the confessional theology of Karl Barth to ...

  3. Amperometric, Bipotentiometric, and Coulometric Titration.

    Science.gov (United States)

    Stock, John T.

    1980-01-01

    Discusses recent review articles in various kinds of titration. Also discusses new research in apparatus and methodology, acid-base reactions, precipitation and complexing reactions, oxidation-reduction reactions, and nomenclature. Cites 338 references. (CS)

  4. The Fisher Market Game: Equilibrium and Welfare

    DEFF Research Database (Denmark)

    Branzei, Simina; Chen, Yiling; Deng, Xiaotie

    2014-01-01

    The Fisher market model is one of the most fundamental resource allocation models in economics. In a Fisher market, the prices and allocations of goods are determined according to the preferences and budgets of buyers to clear the market. In a Fisher market game, however, buyers are strategic...... and report their preferences over goods; the market-clearing prices and allocations are then determined based on their reported preferences rather than their real preferences. We show that the Fisher market game always has a pure Nash equilibrium, for buyers with linear, Leontief, and Cobb-Douglas utility...

  5. Karl Schwarzschild and the professionalization of astrophysics. (German Title: Karl Schwarzschild und die Professionalisierung der Astrophysik)

    Science.gov (United States)

    Schmidt-Kaler, Theodor

    Professionalization is characteristic for physics and astronomy since 1830, and forms the basis for their rapid evolution in the 20th century. Karl Schwarzschild's contributions to professionalization of astronomy are presented: the introduction of course lectures in a repeating cycle, a permanent astrophysical laboratory, a tight connection between teaching and research, simulations and suggestions for astronomy at high schools and for the training of high school teachers, an interest in international organisation, and the initiative and planning of a southern observatory.

  6. Karl Korsch e a Comuna de Paris

    Directory of Open Access Journals (Sweden)

    Luciano Cavini Martorano

    2011-03-01

    Full Text Available

    Apesar de haver escrito uma extensa obra que ainda vem sendo editada no seu país natal, o marxista alemão Karl Korsch é praticamente desconhecido no Brasil – exceção feita a alguns poucos pesquisadores. Além da recente edição brasileira de seu importante trabalho Marxismo e filosofia (Editora UFRJ, e de alguns outros textos e artigos que podem ser encontrados em diferentes sites, o acesso ao conjunto de sua obra ainda é bastante difícil.

  7. Werner Karl Heisenberg (1901-1976)

    International Nuclear Information System (INIS)

    Kvasnica, J.

    1992-01-01

    The life's career of Werner Karl Heisenberg is described with emphasis on his creative development and cooperation with many other prominent physicists in the field of the quantum theory of atoms. In 1925, Heisenberg modified Bohr's quantum rule; in 1927 he formulated the uncertainty principle which puts some restrictions on the simultaneous determination of the position and momentum. In 1928, Heisenberg set up the quantum theory of ferromagnetism, which still underlies all theories of magnetic properties of substances. Soon after Chadwick's discovery of the neutron (1932), Heisenberg introduced the concept of the isospin - he interpreted the proton and the neutron as one particle (nucleon) in two charge states. Heisenberg's professional and pedagogical activities during and after the 2nd world war are also described. (Z.S.). 5 refs

  8. Kernaspekte van die kennissosiologie van Karl Mannheim

    Directory of Open Access Journals (Sweden)

    A. D. Louw

    1985-03-01

    Full Text Available The author deals with certain crucial aspects of the sociology of knowledge of Karl Mannheim in view of the fact that he finds that the increase, worldwide, of interest in ideological difficulties in South Africa can fruitfully be dealt with in terms of this form of sociology. This is justified in part by Mannheim's viewpoint that thought is a function of human existence, and this function emanates from needs based on social factors. He traces Mannheim's use of the term ideology (in Sociology, culminating With the Idea that “the birth and death of ideology depends on certain social, economic and 'ecological' factors”. Subsequently he deals with a whole line of aspects of the sociology of knowledge as expounded by Mannheim, culminating in the idea that shifts in views with regard to lifeview and underlying values take place when there is a rapid upward (vertical mobility, leading to uncertainties and a lack of trust in established values.

  9. Official portrait of Astronaut Anna L. Fisher

    Science.gov (United States)

    1985-01-01

    Official portrait of Astronaut Anna L. Fisher. Fisher is posing with her helmet on the table in front of her and the American flag appears over the opposite shoulder (34357); Posing with an empty table in front of her and the American flag behind her (34358).

  10. Chapter 4: Fishers and American martens

    Science.gov (United States)

    K.L. Purcell; C.M. Thompson; W.J. Zielinski

    2012-01-01

    Fishers (Martes pennanti) and American martens (M. americana) are carnivorous mustelids associated with late-successional forests. The distributions of both species have decreased in the Sierra Nevada and southern Cascade region (Zielinski et al. 2005). Fishers occur primarily in lower elevation (3,500 to 7,000 ft) (1067 to...

  11. Home range characteristics of fishers in California

    Science.gov (United States)

    W. J. Zielinski; R. L. Truex; G. A. Schmidt; F. V. Schlexer; K. N. Schmidt; R. H. Barrett

    2004-01-01

    The fisher (Martes pennanti) is a forest mustelid that historically occurred in California from the mixed conifer forests of the north coast, east to the southern Cascades, and south throughout the Sierra Nevada. Today fishers in California occur only in 2 disjunct populations in the northwestern mountains and the...

  12. TAPIR: a device for automatic titration with incremental weighing of the titration reagent

    International Nuclear Information System (INIS)

    Ganivet, Michel

    TAPIR is a titration device enabling automatic analyses with weighting of the titration reagent. The titration method used can be based on potentiometry, amperometry, color indicator change... The reproducibility is about 3.10 -4 [fr

  13. Kes oli rännumees Karl Feyerabend? / Urmas Sutrop

    Index Scriptorium Estoniae

    Sutrop, Urmas, 1956-

    2001-01-01

    Feyerabend, Karl. Kosmopolitische Wanderungen durch Preussen, Curland, Liefland, Litthauen, Vollhynien, Podolien und Schlesien, in der jahren 1795 bis 1798. In Briefen an einen Freund. Bd. 3. 1801. Eestile on pühendatud reisiraamatu 40. kiri

  14. Karl Timoleon v. Neff / Carl Christian Vogel von Vogelstein

    Index Scriptorium Estoniae

    Vogel von Vogelstein, Carl Christian, 1788-1868

    2004-01-01

    "Ruskii Bibliofil", 1912, nr. 4, lk. 34; fotol tekst: "Piano di Sorrento, Villa Pisani, 20. Juli 1843". Neffi käega kirjutatud: "Karl Timoleon v. Neff geboren in Pühs in Estland im Jahre 1804 d. 2. October"

  15. Balti Maailmanõukogu aktsioonid Helsingis 1975 / Karl Laantee

    Index Scriptorium Estoniae

    Laantee, Karl, 1927-2007

    2006-01-01

    1975. a. Helsingis peetud Euroopa Julgeoleku ja Koostöö Konverentsi Balti delegatsiooni liikme Karl Laantee tekst, mille ta esitas 4. augustil 1975 Balti Maailmanõukogu pressikonverentsil "Continental"hotellis Stockholmis Rootsi Eestlaste Esinduse pressiinfona

  16. Karl Popper at ninety: Highlights of a lifelong intellectual quest

    Science.gov (United States)

    Selleri, Franco; van der Merwe, Alwyn

    1991-12-01

    On the occasion of his ninetieth birthday, Karl Popper's lifelong pursuit of answers in several areas of scientific and philosophical thinking is briefly traced, mainly with reference to excerpts from his own writings.

  17. Märkmeid uusima Preisi tsensuuriinstruktsiooni kohta / Karl Marx

    Index Scriptorium Estoniae

    Marx, Karl

    2000-01-01

    Preisi uue (1841. aasta) tsensuuriinstruktsiooni tõusikliku vaimu vastuolust vana (1818. aasta) tsensuurimääruse ratsionalismiga. Moraali ja religiooni vastuolust. Vt. ka Ain Kaalepi artiklit "Veel Karl Marxist ja tsensuurist

  18. Karl Rawer’s life and scientific achievements*

    Directory of Open Access Journals (Sweden)

    B. W. Reinisch

    2004-01-01

    Full Text Available This laudation is given in honor of the 90th birthday of Prof. Karl Rawer. The ionosphere was discovered during Karl Rawer’s life, and he has dedicated his life to the exploration of this part of Earth’s environment. The horrible events of world wars I and II shaped his early life, but they also launched his career as one of the eminent geophysical scientists of the twentieth century.

  19. Saage tuttavaks : Elisabeth ja Karl von Hoerschelmann / Mai Levin

    Index Scriptorium Estoniae

    Levin, Mai, 1942-

    2004-01-01

    Kuraator M. Levin kuni 10. X 2004 Adamson-Ericu muuseumis avatud näitusest "Tuntud ja tundmatud Elisabeth von Rosendorff-Hoerschelmann ja Karl von Hoerschelmann". Enamik töid on kunstnike laste Konstantin Hoerschelmanni ja Anna Röder-Hoerschelmanni omand. Elisabeth Rosendorff (1898-1984) sündis Virumaal Maidlas eesti perekonnas, Karl von Hoerschelmann (1899-1951) Sevastoopolis saksa perekonnas

  20. Fishers' knowledge on the coast of Brazil.

    Science.gov (United States)

    Begossi, Alpina; Salivonchyk, Svetlana; Lopes, Priscila F M; Silvano, Renato A M

    2016-06-01

    Although fishers' knowledge has been recently considered into management programmes, there is still the need to establish a better understanding of fishers' perceptions and cognition. Fishers can provide novel information on the biology and ecology of species, which can potentially be used in the management of fisheries. The knowledge fishers have and how they classify nature is empirically based. It is common, for example, to observe that fishers' taxonomy is often represented by the generic level, one of the hierarchical categories of folk classification that is somewhat analogous to the Linnean genus, as it groups organisms of a higher rank than the folk species.In this study we compiled the knowledge fishers have on local fish, such as their folk names, diet and habitat. Five coastal communities widely distributed along the Brazilian coast were studied: two from the northeast (Porto Sauípe and Itacimirim, in Bahia State, n of interviewees = 34), two from the southeast (Itaipu at Niterói and Copacabana at Rio de Janeiro, Rio de Janeiro State, n = 35) and one from the south coast (Pântano do Sul, in Santa Catarina State, n = 23). Fish pictures were randomly ordered and the same order was presented to all interviewees (n = 92), when they were then asked about the species name and classification and its habitat and diet preferences. Fishers make clusters of fish species, usually hierarchically; fishers of the coast of Brazil use mostly primary lexemes (generic names) to name fish; and fishers did not differentiate between scientific species, since the same folk generic name included two different scientific species. Fishers provide information on species to which there is scarce or no information on diet and habitat, such as Rhinobatos percellens (chola guitarfish, arraia viola or cação viola), Sphoeroides dorsalis (marbled puffer, baiacu), Mycteroperca acutirostris (comb grouper, badejo) and Dasyatis guttata (longnose stingray, arraia, arraia

  1. A Conversation with Karl K. Turekian

    Science.gov (United States)

    Turekian, Karl K.; Cochran, J. Kirk

    2012-01-01

    Editors' Note Each year, the editorial board invites a distinguished member of the oceanographic community to contribute a prefatory chapter; this year, we were delighted when Karl Turekian, Sterling Professor of Geology and Geophysics at Yale, accepted our invitation. Over the course of a long and productive career, Dr. Turekian has pursued his interests in marine and atmospheric geochemistry by using natural radioactive and radiogenic isotopes to study Earth's evolution and the impacts of global change. He has also directed both the Center for the Study of Global Change at Yale and the Yale Institute for Biospheric Studies. In this interview, conducted by his former student Kirk Cochran, Dr. Turekian tells the story of his early career and discusses some of the major scientific challenges and opportunities faced along the way. His personal account of the rise of geochemistry is a charming story of how chance events and personalities impact scientific careers. His technical insight into the future of this field is illuminating, particularly for scientific outsiders who appreciate the central role of geochemistry in discerning and understanding patterns of global change. Craig A. Carlson and Stephen J. Giovannoni, Editors [Figure: see text

  2. Information Systems Foundations - Karl Popper's third world

    Directory of Open Access Journals (Sweden)

    Craig McDonald

    2002-11-01

    Full Text Available The various information professions have matured separately over the years, developing different bodies of theory and practice to meet their evolving purposes and needs. A problem arises however, when different information professions address the same knowledge domain and there is no explicit correspondence between the conceptual structures embedded independently in each. In this situation, a knowledge worker involved in the domain is faced with a range of possibly incompatible structures presented in different forms by a range of information professions. This is a common problem that is being exacerbated by the explosion in information production and the widening access to information distribution technology, notably the World Wide Web. Information Systems now need to combine the best of what the information professions in a domain have to offer the domain’s knowledge workers. This paper examines the problem by exploring one of the foundations of the information disciplines - Karl Popper’s 3 Worlds theory, applying it to a case study and suggesting that the Information Systems discipline alone has a sufficiently broad agenda to integrate the various Informatics themes needed to support today’s knowledge workers.

  3. Karl Marx dan Konsep Perjuangan Kelas Sosial

    Directory of Open Access Journals (Sweden)

    Indriaty Ismail

    2012-06-01

    Full Text Available ¬¬This article explores the history of the renowned world economic and political reformist, Karl Marx with a special focus on the social class concept. It also discusses to what extent that the Marx’s concept of social class struggle is capable to provide a way out to the proletariats, to free themselves from the chains of cruelty, violence and alienation in the capitalist system. Our main focal point is to scrutinize the relationship between the concepts of social class struggle and the need for a social revolution as a catalyst for the formation of a classless society. Along the way, we studied and analyzed the documents produced on the primary sources covering major works of Marx and the secondary sources consisting reviews of the Marx’s class concept. As a result, we found out that Marx’s concept of class fight is competent to represent the oppressed group to battle for their freedom rights. The Proletariat dictatorship attitude was used as their main shield to face the threat of the capitalist class. Marx’s ultimate success is realized through a burst of ideas and beliefs that supports the ideas of egalitarian Communism although many contradictions arise between the ideas of Marx and the 20th centuries Communism when they are translated into practice.

  4. An evaluation of parturition indices in fishers

    Science.gov (United States)

    Frost, H.C.; York, E.C.; Krohn, W.B.; Elowe, K.D.; Decker, T.A.; Powell, S.M.; Fuller, T.K.

    1999-01-01

    Fishers (Martes pennanti) are important forest carnivores and furbearers that are susceptible to overharvest. Traditional indices used to monitor fisher populations typically overestimate litter size and proportion of females that give birth. We evaluated the usefulness of 2 indices of reproduction to determine proportion of female fishers that gave birth in a particular year. We used female fishers of known age and reproductive histories to compare appearance of placental scars with incidence of pregnancy and litter size. Microscopic observation of freshly removed reproductive tracts correctly identified pregnant fishers and correctly estimated litter size in 3 of 4 instances, but gross observation of placental scars failed to correctly identify pregnant fishers and litter size. Microscopic observations of reproductive tracts in carcasses that were not fresh also failed to identify pregnant animals and litter size. We evaluated mean sizes of anterior nipples to see if different reproductive classes could be distinguished. Mean anterior nipple size of captive and wild fishers correctly identified current-year breeders from nonbreeders. Former breeders were misclassified in 4 of 13 instances. Presence of placental scars accurately predicted parturition in a small sample size of fishers, but absence of placental scars did not signify that a female did not give birth. In addition to enabling the estimation of parturition rates in live animals more accurately than traditional indices, mean anterior nipple size also provided an estimate of the percentage of adult females that successfully raised young. Though using mean anterior nipple size to index reproductive success looks promising, additional data are needed to evaluate effects of using dried, stretched pelts on nipple size for management purposes.

  5. Fishers' knowledge and seahorse conservation in Brazil.

    Science.gov (United States)

    Rosa, Ierecê Ml; Alves, Rômulo Rn; Bonifácio, Kallyne M; Mourão, José S; Osório, Frederico M; Oliveira, Tacyana Pr; Nottingham, Mara C

    2005-12-08

    From a conservationist perspective, seahorses are threatened fishes. Concomitantly, from a socioeconomic perspective, they represent a source of income to many fishing communities in developing countries. An integration between these two views requires, among other things, the recognition that seahorse fishers have knowledge and abilities that can assist the implementation of conservation strategies and of management plans for seahorses and their habitats. This paper documents the knowledge held by Brazilian fishers on the biology and ecology of the longsnout seahorse Hippocampus reidi. Its aims were to explore collaborative approaches to seahorse conservation and management in Brazil; to assess fishers' perception of seahorse biology and ecology, in the context evaluating potential management options; to increase fishers' involvement with seahorse conservation in Brazil. Data were obtained through questionnaires and interviews made during field surveys conducted in fishing villages located in the States of Piauí, Ceará, Paraíba, Maranhão, Pernambuco and Pará. We consider the following aspects as positive for the conservation of seahorses and their habitats in Brazil: fishers were willing to dialogue with researchers; although captures and/or trade of brooding seahorses occurred, most interviewees recognized the importance of reproduction to the maintenance of seahorses in the wild (and therefore of their source of income), and expressed concern over population declines; fishers associated the presence of a ventral pouch with reproduction in seahorses (regardless of them knowing which sex bears the pouch), and this may facilitate the construction of collaborative management options designed to eliminate captures of brooding specimens; fishers recognized microhabitats of importance to the maintenance of seahorse wild populations; fishers who kept seahorses in captivity tended to recognize the condtions as poor, and as being a cause of seahorse mortality.

  6. Fishers' knowledge and seahorse conservation in Brazil

    Directory of Open Access Journals (Sweden)

    Oliveira Tacyana PR

    2005-12-01

    Full Text Available Abstract From a conservationist perspective, seahorses are threatened fishes. Concomitantly, from a socioeconomic perspective, they represent a source of income to many fishing communities in developing countries. An integration between these two views requires, among other things, the recognition that seahorse fishers have knowledge and abilities that can assist the implementation of conservation strategies and of management plans for seahorses and their habitats. This paper documents the knowledge held by Brazilian fishers on the biology and ecology of the longsnout seahorse Hippocampus reidi. Its aims were to explore collaborative approaches to seahorse conservation and management in Brazil; to assess fishers' perception of seahorse biology and ecology, in the context evaluating potential management options; to increase fishers' involvement with seahorse conservation in Brazil. Data were obtained through questionnaires and interviews made during field surveys conducted in fishing villages located in the States of Piauí, Ceará, Paraíba, Maranhão, Pernambuco and Pará. We consider the following aspects as positive for the conservation of seahorses and their habitats in Brazil: fishers were willing to dialogue with researchers; although captures and/or trade of brooding seahorses occurred, most interviewees recognized the importance of reproduction to the maintenance of seahorses in the wild (and therefore of their source of income, and expressed concern over population declines; fishers associated the presence of a ventral pouch with reproduction in seahorses (regardless of them knowing which sex bears the pouch, and this may facilitate the construction of collaborative management options designed to eliminate captures of brooding specimens; fishers recognized microhabitats of importance to the maintenance of seahorse wild populations; fishers who kept seahorses in captivity tended to recognize the condtions as poor, and as being a cause of

  7. Evaluation of an automatic uranium titration system

    International Nuclear Information System (INIS)

    Lewis, K.

    1980-01-01

    The titration system utilizes the constant current coulometric titration of Goldbeck and Lerner. U(VI) is reduced to U(IV) by Fe(II). V(V) is generated to titrate the U(IV), and the titration is followed potentiometrically. The evaluation shows that the recovery of uranium is 100% at the 40-mg level. The accuracy is generally +-0.10% or better. The smallest sample weight at which reliable results were obtained was 40 mg of uranium. Time for one analysis is 15 minutes. Advantages and disadvantages of the automated titrator are listed

  8. Automated back titration method to measure phosphate

    International Nuclear Information System (INIS)

    Comer, J.; Tehrani, M.; Avdeef, A.; Ross, J. Jr.

    1987-01-01

    Phosphate was measured in soda drinks and as an additive in flour, by a back titration method in which phosphate was precipitated with lanthanum, and the excess lanthanum was titrated with fluoride. All measurements were performed using the Orion fluoride electrode and the Orion 960 Autochemistry System. In most commercial automatic titrators, the inflection point of the titration curve, calculated from the first derivative of the curve, is used to find the equivalence polar of the titration. The inflection technique is compared with a technique based on Gran functions, which uses data collected after the end point and predicts the equivalence point accordingly

  9. Automatic titrator for high precision plutonium assay

    International Nuclear Information System (INIS)

    Jackson, D.D.; Hollen, R.M.

    1986-01-01

    Highly precise assay of plutonium metal is required for accountability measurements. We have developed an automatic titrator for this determination which eliminates analyst bias and requires much less analyst time. The analyst is only required to enter sample data and start the titration. The automated instrument titrates the sample, locates the end point, and outputs the results as a paper tape printout. Precision of the titration is less than 0.03% relative standard deviation for a single determination at the 250-mg plutonium level. The titration time is less than 5 min

  10. Application of Fisher Information to Complex Dynamic Systems (Tucson)

    Science.gov (United States)

    Fisher information was developed by the statistician Ronald Fisher as a measure of the information obtainable from data being used to fit a related parameter. Starting from the work of Ronald Fisher1 and B. Roy Frieden2, we have developed Fisher information as a measure of order ...

  11. Application of Fisher Information to Complex Dynamic Systems

    Science.gov (United States)

    Fisher information was developed by the statistician Ronald Fisher as a measure of the information obtainable from data being used to fit a related parameter. Starting from the work of Ronald Fisher1 and B. Roy Frieden2, we have developed Fisher information as a measure of order ...

  12. Historical harvest and incidental capture of fishers in California

    Science.gov (United States)

    Jeffrey C. Lewis; William J. Zielinski

    1996-01-01

    Recent petitions to list the fisher (Martes pennanti) under the Endangered Species Act have brought attention to fisher conservation. Although commercial trapping of fishers in California ended in 1946, summarizing the commercial harvest data can provide a historical perspective to fisher conservation and may indicate the prevalence of incidental...

  13. A new family of Fisher-curves estimates Fisher's alpha more accurately

    NARCIS (Netherlands)

    Schulte, R.P.O.; Lantinga, E.A.; Hawkins, M.J.

    2005-01-01

    Fisher's alpha is a satisfactory scale-independent indicator of biodiversity. However, alpha may be underestimated in communities in which the spatial arrangement of individuals is strongly clustered, or in which the total number of species does not tend to infinity. We have extended Fisher's curve

  14. Constructing Marxism: Karl Kautsky and the French Revolution

    DEFF Research Database (Denmark)

    Nygaard, Bertel

    2009-01-01

    Karl Kautsky's writings on the French Revolution were crucial to the construction not only of the Marxist interpretation of the Revolution, which was perhaps the most important reference point for the historiography of that event during the 20th century, but even of Marxism itself as a comprehens......Karl Kautsky's writings on the French Revolution were crucial to the construction not only of the Marxist interpretation of the Revolution, which was perhaps the most important reference point for the historiography of that event during the 20th century, but even of Marxism itself...

  15. Træk af en ung Karl Marx

    DEFF Research Database (Denmark)

    Ziegler, Magnus Møller

    2018-01-01

    Det kritiske program, som var Karl Marx' bidrag til både tænkningen og den revolutionære bevægelse, tog sit udgangspunkt i det filosofiske miljø, der dominerede i Tyskland i 1840'erne.......Det kritiske program, som var Karl Marx' bidrag til både tænkningen og den revolutionære bevægelse, tog sit udgangspunkt i det filosofiske miljø, der dominerede i Tyskland i 1840'erne....

  16. Mozart, Karl Barth, og den kristne troslæren

    DEFF Research Database (Denmark)

    Petersen, Nils Holger

    2010-01-01

    En diskussion af Karl Barths teologiske brug af W.A.Mozart i den kirchliche Dogmatik med kontekstuel inddragelse af en til en vis grad tilsvarende overordnet diskussion af Mozart, skrevet af en samtidig musiker, den fremtrædende Mozart-dirigent Ferenc Fricsay. ......En diskussion af Karl Barths teologiske brug af W.A.Mozart i den kirchliche Dogmatik med kontekstuel inddragelse af en til en vis grad tilsvarende overordnet diskussion af Mozart, skrevet af en samtidig musiker, den fremtrædende Mozart-dirigent Ferenc Fricsay. ...

  17. A DIMENSÃO ECLESIAL DOS SACRAMENTOS SEGUNDO KARL RAHNER

    Directory of Open Access Journals (Sweden)

    P. Francisco Taborda

    1976-01-01

    Full Text Available Escrever sobre Karl Rahner já deixou de ser moda. Por isso mesmo vale a pena tentá-lo. Ultrapassados o entusiasmo novidadeiro e o ardor sectário, o estudo do teólogo alemão pode ser muito mais frutuo-so à reflexão teológica. Indubitavelmente — tenha-se sobre ele a opinião que for — Karl Rahner marcou profundamente a teologia católica, de cuja renovação entre os anos 50 e 70 de nosso século foi u m dos mais importantes fautores.

  18. Management and Profile of Rape Victims attending the Karl Bremer ...

    African Journals Online (AJOL)

    Setting: The study was conducted at the rape centre at the Karl Bremer Hospital, Cape Town, South Africa. To describe the frequency of sexually transmitted infections (STIs) in rape victims, all consecutive patients who presented to the rape centre over the one-year period from 1 April 2006 to 31 March 2007 were included ...

  19. The Power of Prevention: Dr. Karl Augustus Menninger.

    Science.gov (United States)

    Gillogly, Robert R.

    1993-01-01

    This issue's "Voices of Pioneers" segment features the work of Karl Menninger, pre-eminent psychiatrist, and his contributions to prison reform, mental health, and child care systems. Notes many of Menninger's books and writings, including relevant quotes throughout the article. Also describes Menninger's concern over the plight of…

  20. The Wartime Success of Karl Shapiro's V-Letter

    NARCIS (Netherlands)

    Oostdijk, D.M.

    2006-01-01

    The American soldier-poet Karl Shapiro won the Pulitzer Prize for V-Letter and Other Poems (1944), making him an instant celebrity. The volume was written while he was stationed in Australia and New Guinea during World War II. Shaprio sent the completed poems to his fiancée, Evalyn Katz, who edited

  1. Karl Popper and Jean Piaget: A Rationale for Constructivism

    Science.gov (United States)

    Harlow, Steve; Cummings, Rhoda; Aberasturi, Suzanne M.

    2006-01-01

    The current faddish use of the term constructivism has taken on as many different definitions as the number of people attempting to define it. This essay clarifies the meaning of constructivism through an examination of Karl Popper's and Jean Piaget's theories. The authors provide a rationale for the use of Popper's paradigm of "Three Worlds" and…

  2. The Reference Process and the Philosophy of Karl Popper.

    Science.gov (United States)

    Neill, S. D.

    1985-01-01

    Two aspects of Karl Popper's philosophy are applied to reference process: process is viewed as series of problem-solving situations amenable to analysis using Popper's problem-solving schema. Reference interview is analyzed in context of Popper's postulate that books contain autonomous world of ideas existing apart from mind of knower. (30…

  3. Kõne EV aastapäeva aktusel / Karl Altau

    Index Scriptorium Estoniae

    Altau, Karl Stephen, 1959-

    2006-01-01

    Läti kirikus peetud Eesti Vabariigi aastapäeva aktusel rääkis Karl Altau Ühendatud Balti Ameerika Komitee nimel kommunismi ohvrite mälestussamba ehitamise alustamisest Washingtoni kesklinna 2006. aastal, koostööst kõigi baltlaste vahel ja võimalusest annetada, üleskutsest toetada Valgevene rahvast teel demokraatiale

  4. The nature and consequence of Karl Marx's skin disease.

    Science.gov (United States)

    Shuster, S

    2008-01-01

    From an analysis of the original correspondence, it has been possible to establish that Karl Marx's incapacitating skin disease was hidradenitis suppurativa, not 'boils' as was universally assumed at the time and since; the psychological effect of this illness on the man and his work appears to have been considerable.

  5. Karl Marx as a Social Scientist and Utopian Dreamer.

    Science.gov (United States)

    Stevenson, James A.

    The central paradox of Karl Marx's work is his belief that the vision of mankind leaving inequality and scarcity behind is attainable. The idea that human alienation, inequality, and need could be rendered obsolete by a future communist society of abundance is a significant failing in Marx's thought. It is at the same time the critical element in…

  6. hts 63_4_ vanwyk natie karl barth 2007 _outeur

    African Journals Online (AJOL)

    p1243322

    Karl Barth's dogmatics is a theology of the Second Article of the Creed .... his theology: • According to Barth, ethics is the teaching of God's command (Gebot). ...... Americanism in the form of religious show business is threatening to destroy our ...

  7. Hannah Arendt and Karl Jaspers: The Time of Friendship

    Science.gov (United States)

    Nixon, Jon

    2016-01-01

    This paper provides an introduction to the enduring friendship between Hannah Arendt and Karl Jaspers. It shows how their intellectual development as public educators was sustained by their ongoing dialogue which flourished not in spite of but because of their huge differences of circumstance and personality. This friendship between two renowned…

  8. Historical consciousness and existential awareness in Karl Barth\\'s ...

    African Journals Online (AJOL)

    Karl Barth's hermeneutic legacy prolonged Western Christian tradition, especially influenced by Hegelian philosophy of history. This led to Barth's “theological exegesis” instead of a historic-critical exegesis. In a preceding article Barth's understanding of the notion “hermeneutic circle” is discussed against the background of ...

  9. Risks and Benefits of Rapid Clozapine Titration.

    Science.gov (United States)

    Lochhead, Jeannie D; Nelson, Michele A; Schneider, Alan L

    2016-05-18

    Clozapine is often considered the gold standard for the treatment of schizophrenia. Clinical guidelines suggest a gradual titration over 2 weeks to reduce the risks of adverse events such as seizures, hypotension, agranulocytosis, and myocarditis. The slow titration often delays time to therapeutic response. This raises the question of whether, in some patients, it may be safe to use a more rapid clozapine titration. The following case illustrates the potential risks associated with the use of multiple antipsychotics and rapid clozapine titration. We present the case of a young man with schizophrenia who developed life threatening neuroleptic malignant syndrome (NMS) during rapid clozapine titration and treatment with multiple antipsychotics. We were unable to find another case in the literature of NMS associated with rapid clozapine titration. This case is meant to urge clinicians to carefully evaluate the risks and benefits of rapid clozapine titration, and to encourage researchers to further evaluate the safety of rapid clozapine titration. Rapid clozapine titration has implications for decreasing health care costs associated with prolonged hospitalizations, and decreasing the emotional suffering associated with uncontrolled symptoms of psychosis. Clozapine is considered the most effective antipsychotic available thus efforts should focus on developing strategies that would allow for safest and most efficient use of clozapine to encourage its utilization for treatment resistance schizophrenia.

  10. Risks and benefits of rapid clozapine titration

    Directory of Open Access Journals (Sweden)

    Jeannie D. Lochhead

    2016-05-01

    Full Text Available Clozapine is often considered the gold standard for the treatment of schizophrenia. Clinical guidelines suggest a gradual titration over 2 weeks to reduce the risks of adverse events such as seizures, hypotension, agranulocytosis, and myocarditis. The slow titration often delays time to therapeutic response. This raises the question of whether, in some patients, it may be safe to use a more rapid clozapine titration. The following case illustrates the potential risks associated with the use of multiple antipsychotics and rapid clozapine titration. We present the case of a young man with schizophrenia who developed life threatening neuroleptic malignant syndrome (NMS during rapid clozapine titration and treatment with multiple antipsychotics. We were unable to find another case in the literature of NMS associated with rapid clozapine titration. This case is meant to urge clinicians to carefully evaluate the risks and benefits of rapid clozapine titration, and to encourage researchers to further evaluate the safety of rapid clozapine titration. Rapid clozapine titration has implications for decreasing health care costs associated with prolonged hospitalizations, and decreasing the emotional suffering associated with uncontrolled symptoms of psychosis. Clozapine is considered the most effective antipsychotic available thus efforts should focus on developing strategies that would allow for safest and most efficient use of clozapine to encourage its utilization for treatment resistance schizophrenia.

  11. After "Fisher": Academic Review and Judicial Scrutiny

    Science.gov (United States)

    La Noue, George R.

    2013-01-01

    This article describes the outcomes of the case "Fisher v. University of Texas at Austin," in which the plaintiff had accused the University of Texas (UT) of racial discrimination in the admission process. The author believes that the ruling of the court in this case makes it harder to hide race-based measures used in college admissions.…

  12. Haldane and Fisher – scientific interactions

    Indian Academy of Sciences (India)

    A. W. F. Edwards

    2017-11-25

    Nov 25, 2017 ... Fisher, Haldane was invited to an Indian Science Congress, in 1952, and had .... social science had been quick to draw attention to the pioneering work of ... methods of statistical inference which he had developed over the ...

  13. A Haldane perspective from a Fisher student

    Indian Academy of Sciences (India)

    W. F. Bodmer

    2017-11-24

    Nov 24, 2017 ... Journal of Genetics, Vol. 96, No. ... ics of the Medical Research Council, of which Hogben and self are ... Haldane often influenced people and their science in ways .... Fisher in a talk at the 1935 International Congress of Life.

  14. Ronald Fisher forenede gener og evolution

    DEFF Research Database (Denmark)

    Alstrup, Aage Kristian Olsen; Winterdahl, Michael; Wang, Tobias

    2013-01-01

    Ronald Fisher var en sand kontroversiel pioner. Den dygtige matematiker anvendte blandt andet sine evner indenfor biologien og blev en af hovedmændene bag den moderne syntese, hvor genetik og evolution forenes. Hans syn på racehygiejne og sammenhængen mellem rygning og lungekræft gjorde ham dog til...

  15. Intertwining of the Wright-Fisher diffusion

    Czech Academy of Sciences Publication Activity Database

    Hudec, Tobiáš

    2017-01-01

    Roč. 53, č. 4 (2017), s. 730-746 ISSN 0023-5954 Institutional support: RVO:67985556 Keywords : Intertwining of Markov processes * Wright-Fisher diffusion * pure birth process Subject RIV: BA - General Mathematics OBOR OECD: Statistics and probability Impact factor: 0.379, year: 2016 http://library.utia.cas.cz/separaty/2017/SI/hudec-0481495.pdf

  16. Nap-titration : An effective alternative for continuous positive airway pressure titration

    NARCIS (Netherlands)

    Hoekema, A; Stegenga, B; Meinesz, AF; van der Hoeven, JH; Wijkstra, PJ

    When treating Obstructive Steep Apnea-Hypopnea Syndrome (OSAHS) several alternatives for standard (manual) continuous positive airway pressure (CPAP) titration are feasible. A practical alternative is titration without polysomnography during an afternoon nap (Nap-titration). The aim of the present

  17. Contributions to the theory of catalytic titrations-III Neutralization catalytic titrations.

    Science.gov (United States)

    Gaál, F F; Abramović, B F

    1985-07-01

    Neutralization catalytic titrations of weak monoprotic adds and bases with both volumetric and coulometric addition of the titrant (strong base/acid) have been simulated by taking into account the equilibrium concentration of the catalyst during the titration. The influence of several factors on the shape of the simulated catalytic titration curve has been investigated and is discussed.

  18. Fisher information and Rényi dimensions: A thermodynamical formalism

    Energy Technology Data Exchange (ETDEWEB)

    Godó, B.; Nagy, Á. [Department of Theoretical Physics, University of Debrecen, H–4002 Debrecen (Hungary)

    2016-08-15

    The relation between the Fisher information and Rényi dimensions is established: the Fisher information can be expressed as a linear combination of the first and second derivatives of the Rényi dimensions with respect to the Rényi parameter β. The Rényi parameter β is the parameter of the Fisher information. A thermodynamical description based on the Fisher information with β being the inverse temperature is introduced for chaotic systems. The link between the Fisher information and the heat capacity is emphasized, and the Fisher heat capacity is introduced.

  19. Standard test method for water in lint cotton by oven evaporation combined with volumetric Karl Fischer Titration

    Science.gov (United States)

    The referenced test method for total water content and water regain in lint cotton was developed by USDA scientists in New Orleans at the request of the cotton industry. The method covers the determination of the total water (free and bound) in raw and lint cotton at moisture equilibrium from con...

  20. Understanding the bias between moisture content by oven drying and water content by Karl Fischer titration at moisture equilibrium

    Science.gov (United States)

    Multiple causes of the difference between equilibrium moisture and water content have been found. The errors or biases were traced to the oven drying procedure to determine moisture content. The present paper explains the nature of the biases in oven drying and how it is possible to suppress one ...

  1. Fisher Etkisinin Türkiye Verileri ile Testi = The Analysis of Fisher Effect Using Turkish Data

    Directory of Open Access Journals (Sweden)

    Cem KADILAR

    2006-01-01

    Full Text Available In this study, the Fisher effect, which claims that there is one to one long-term relationship between the inflation rate and the long-term nominal interest rate, has been tested using Turkish quarterly data over the 1987(I- 2004(4 periods. Here, ARDL bounds testing approach to cointegration newly developed by Pesaran et al. (2001 in applied econometrics is used. Results support the Fisher effect.

  2. A Tabular Approach to Titration Calculations

    Science.gov (United States)

    Lim, Kieran F.

    2012-01-01

    Titrations are common laboratory exercises in high school and university chemistry courses, because they are easy, relatively inexpensive, and they illustrate a number of fundamental chemical principles. While students have little difficulty with calculations involving a single titration step, there is a significant leap in conceptual difficulty…

  3. Symmetry Properties of Potentiometric Titration Curves.

    Science.gov (United States)

    Macca, Carlo; Bombi, G. Giorgio

    1983-01-01

    Demonstrates how the symmetry properties of titration curves can be efficiently and rigorously treated by means of a simple method, assisted by the use of logarithmic diagrams. Discusses the symmetry properties of several typical titration curves, comparing the graphical approach and an explicit mathematical treatment. (Author/JM)

  4. Potentiometric titration of metal ions in ethanol.

    Science.gov (United States)

    Gibson, Graham T T; Mohamed, Mark F; Neverov, Alexei A; Brown, R S

    2006-09-18

    The potentiometric titrations of Zn2+, Cu2+ and 12 Ln3+ metal ions were obtained in ethanol to determine the titration constants (defined as the at which the [-OEt]/[Mx+]t ratios are 0.5, 1.5, and 2.5) and in two cases (La3+ and Zn2+) a complete speciation diagram. Several simple monobasic acids and aminium ions were also titrated to test the validity of experimental titration measurements and to establish new constants in this medium that will be useful for the preparation of buffers and standard solutions. The dependence of the titration constants on the concentration and type of metal ion and specific counterion effects is discussed. In selected cases, the titration profiles were analyzed using a commercially available fitting program to obtain information about the species present in solution, including La3+ for which a dimer model is proposed. The fitting provides the microscopic values for deprotonation of one to four metal-bound ethanol molecules. Kinetics for the La3+-catalyzed ethanolysis of paraoxon as a function of are presented and analyzed in terms of La3+ speciation as determined by the analysis of potentiometric titration curves. The stability constants for the formation of Zn2+ and Cu2+ complexes with 1,5,9-triazacyclododecane as determined by potentiometric titration are presented.

  5. The Socio-economics and Alternative Livelihood Options of Fishers ...

    African Journals Online (AJOL)

    The Socio-economics and Alternative Livelihood Options of Fishers of Lake Victoria, ... PROMOTING ACCESS TO AFRICAN RESEARCH ... Most fishers were males aged 29-38yrs while women were involved in processing and marketing.

  6. Solitary wave and periodic wave solutions for Burgers, Fisher ...

    Indian Academy of Sciences (India)

    The generalized (G′/G)-expansion method; Burgers equation; Fisher's equation; ... the travelling wave solutions plays an important role in nonlinear sciences. ... Burgers, Fisher, Huxley equations and combined forms of these equations will ...

  7. Algebraic quantity equations before Fisher and Pigou

    OpenAIRE

    Thomas M. Humphrey

    1984-01-01

    Readers of this Review are doubtlessly familiar with the famous equation of exchange, MV=PQ, frequently employed to analyze the price level effects of monetary shocks. One might think the algebraic formulation of the equation is an outgrowth of the 20th century tendency toward mathematical modeling and statistical testing. Indeed, textbooks typically associate the transaction velocity version of the equation with Irving Fisher and the alternative Cambridge cash balance version with A. C. Pigo...

  8. Fisher information, nonclassicality and quantum revivals

    Energy Technology Data Exchange (ETDEWEB)

    Romera, Elvira [Instituto Carlos I de Física Teórica y Computacional, Universidad de Granada, Fuentenueva s/n, 18071 Granada (Spain); Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, Fuentenueva s/n, 18071 Granada (Spain); Santos, Francisco de los, E-mail: dlsantos@onsager.ugr.es [Instituto Carlos I de Física Teórica y Computacional, Universidad de Granada, Fuentenueva s/n, 18071 Granada (Spain); Departamento de Electromagnetismo y Física de la Materia, Universidad de Granada, Fuentenueva s/n, 18071 Granada (Spain)

    2013-11-08

    Wave packet revivals and fractional revivals are studied by means of a measure of nonclassicality based on the Fisher information. In particular, we show that the spreading and the regeneration of initially Gaussian wave packets in a quantum bouncer and in the infinite square-well correspond, respectively, to high and low nonclassicality values. This result is in accordance with the physical expectations that at a quantum revival wave packets almost recover their initial shape and the classical motion revives temporarily afterward.

  9. Fisher information, nonclassicality and quantum revivals

    International Nuclear Information System (INIS)

    Romera, Elvira; Santos, Francisco de los

    2013-01-01

    Wave packet revivals and fractional revivals are studied by means of a measure of nonclassicality based on the Fisher information. In particular, we show that the spreading and the regeneration of initially Gaussian wave packets in a quantum bouncer and in the infinite square-well correspond, respectively, to high and low nonclassicality values. This result is in accordance with the physical expectations that at a quantum revival wave packets almost recover their initial shape and the classical motion revives temporarily afterward.

  10. Kuninganna Kristiina ning kunungas Karl XI : rootsiaegsed portreed raekojas = Queen Christina and King Karl XI : portraits of the Swedish period in the Town Hall / Pia Ehasalu

    Index Scriptorium Estoniae

    Ehasalu, Pia, 1964-

    2004-01-01

    Kuninganna Kristiina portreest lapsena (1638). Arvatav autor: Rootsi tolleaegne õuekunstnik Jacob Heinrich Elbfas või tema töökoda. Rootsi kuninga Karl XI noorpõlveportreest (1670). Autor: Karl XI õuekunstnik David Klöcker Ehrenstrahl (1628-1698)

  11. Potentiometric Titration Method for Quantitative Determination of Hydrogen Peroxide

    National Research Council Canada - National Science Library

    Bessette, Russell R

    2005-01-01

    An electrochemical potentiometric titration method that entails titration of a known volume of a catholyte containing an unknown amount of hydrogen peroxide in a titration cell having two electrodes...

  12. 1st Karl Schwarzschild Meeting on Gravitational Physics

    CERN Document Server

    Kaminski, Matthias; Mureika, Jonas; Bleicher, Marcus

    2016-01-01

    These proceedings collect the selected contributions of participants of the First Karl Schwarzschild Meeting on Gravitational Physics, held in Frankfurt, Germany to celebrate the 140th anniversary of Schwarzschild's birth. They are grouped into 4 main themes: I. The Life and Work of Karl Schwarzschild; II. Black Holes in Classical General Relativity, Numerical Relativity, Astrophysics, Cosmology, and Alternative Theories of Gravity; III. Black Holes in Quantum Gravity and String Theory; IV. Other Topics in Contemporary Gravitation. Inspired by the foundational principle ``By acknowledging the past, we open a route to the future",  the week-long meeting, envisioned as a forum for exchange between scientists from all locations and levels of education, drew participants from 15 countries across 4 continents. In addition to plenary talks from leading researchers, a special focus on young talent was provided, a feature underlined by the Springer Prize for the best student and junior presentations.

  13. Karl Raimund Popper: Problem Neopositivistik dan Teori Kritis Falsifikasi

    Directory of Open Access Journals (Sweden)

    M. Syamsul Huda

    2014-01-01

    Full Text Available Karl Popper once criticizes the positivistic paradigm by means of what he calls the theory of falsification. To him, the positivistic paradigm constitutes a failure simply because it cannot distinguish between science and prude science, that is, between empirical method and non-empirical method. In the scientific knowledge, empirical science, mathematics and logic must be differentiated, something that the positivistic paradigm has failed to do. This paradigm furthermore, did not have a clear picture what logic-based science is, empirical knowledge and psychology of knowledge. It also fails to properly understand knowledge that springs from tradition, emotion, authority and so forth. All positivistic paradigms such as that of Karl Max’s Historicism, Freud’s theory of Psycho Analysis, Adler’s theory of Individual Analysis and Newton’s theory of Gravitation fall into this trap of failure.

  14. Exact solution for the generalized Telegraph Fisher's equation

    International Nuclear Information System (INIS)

    Abdusalam, H.A.; Fahmy, E.S.

    2009-01-01

    In this paper, we applied the factorization scheme for the generalized Telegraph Fisher's equation and an exact particular solution has been found. The exact particular solution for the generalized Fisher's equation was obtained as a particular case of the generalized Telegraph Fisher's equation and the two-parameter solution can be obtained when n=2.

  15. Fisher classifier and its probability of error estimation

    Science.gov (United States)

    Chittineni, C. B.

    1979-01-01

    Computationally efficient expressions are derived for estimating the probability of error using the leave-one-out method. The optimal threshold for the classification of patterns projected onto Fisher's direction is derived. A simple generalization of the Fisher classifier to multiple classes is presented. Computational expressions are developed for estimating the probability of error of the multiclass Fisher classifier.

  16. Effects of snow on fisher and marten distributions in Idaho

    Science.gov (United States)

    Nathan Albrecht; C. Heusser; M. Schwartz; J. Sauder; R. Vinkey

    2013-01-01

    Studies have suggested that deep snow may limit fisher (Martes pennanti) distribution, and that fisher populations may in turn limit marten (Martes americana) distribution. We tested these hypotheses in the Northern Rocky Mountains of Idaho, a region which differs from previous study areas in its climate and relative fisher and marten abundance, but in which very...

  17. 77 FR 15650 - Fisher House and Other Temporary Lodging

    Science.gov (United States)

    2012-03-16

    ... DEPARTMENT OF VETERANS AFFAIRS 38 CFR Part 60 RIN 2900-AN79 Fisher House and Other Temporary... Affairs (VA) proposes to amend its regulations concerning Fisher House and other temporary lodging... assistance and clarify the distinctions between Fisher House and other temporary lodging provided by VA. The...

  18. Architecture and Art Regulations for Karl Marx Street

    Directory of Open Access Journals (Sweden)

    Alla Mironenko

    2015-08-01

    Full Text Available The architecture and art regulations for Karl Marx Street and adjoining territories have been worked out for the Committee for town planning of the Irkutsk city administration. Basic provisions: facades of buildings and structures, outdoor advertising and information facilities, artistic illumination of buildings, elements of land improvements. The main principle is to preserve historical appearance and to create a contemporary and comfortable environment.

  19. Karl Kolbenheyer (1841–1901 – teacher, naturalist, tourist

    Directory of Open Access Journals (Sweden)

    Stefan Witold Alexandrowicz

    2017-12-01

    Full Text Available Karl Kolbenheyer was born on May 28, 1841 in Bielsko. After attending a lower secondary school in Cieszyn, he began studies in classical languages (Greek and Latin at universities in Vienna and Jena, then he worked as a teacher in lower secondary schools in Lewocza, Cieszyn, and Bielsko. The research he undertook included botanical studies, measurements of absolute elevation, and meteorological observations in the Western Beskids as well as in the Tatra Mountains. The results of the studies were printed in German, Austrian, Polish, and Hungarian publications. He found species of plants not known earlier to exist in the area of Cieszyn and Bielsko. The measurements of elevations he made of characteristic points of landscape (more than 500 were used for cartographic purposes. From 1866 on, he was a member of Physiographic Commission of Kraków Scientific Society, and later of the Academy of Arts and Sciences, which financially supported his field work. Karl Kolbenheyer was one of the founders of the Beskidenverein – a German tourist organisation – and managed its branch in Bielsko. He prepared two tourist guides: the guide to Tatra Mountains – Die hohe Tatra (ten editions, and to the Beskids – Führer durch die Beskiden… (two editions. These guides contributed to the remarkable propagation of tourism. Karl Kolbenheyer died on February 1, 1901, and was buried at the Old Evangelical Cemetery in Bielsko.

  20. Linear Titration Curves of Acids and Bases.

    Science.gov (United States)

    Joseph, N R

    1959-05-29

    The Henderson-Hasselbalch equation, by a simple transformation, becomes pH - pK = pA - pB, where pA and pB are the negative logarithms of acid and base concentrations. Sigmoid titration curves then reduce to straight lines; titration curves of polyelectrolytes, to families of straight lines. The method is applied to the titration of the dipeptide glycyl aminotricarballylic acid, with four titrable groups. Results are expressed as Cartesian and d'Ocagne nomograms. The latter is of a general form applicable to polyelectrolytes of any degree of complexity.

  1. Non-aqueous titration of hydroxamic acids.

    Science.gov (United States)

    Stamey, T W; Christian, R

    1966-01-01

    Benzohydroxamic acid is titrated with 0.1M tetrabutyl-anunonium hydroxide in nine non-aqueous solvents with three different indicating electrodes. The best results are obtained using dimethylformamide as solvent and platinum-platinum electrodes. Four monoprotic and three diprotic hydroxamie acids and iron(III) benzohydroxamate have been successfully titrated with this system. The effect of quantitative additions of carbon dioxide to the titrant on its apparent molarity are found to be dependent on the amount added, the strength and sample size of acid titrated and the solvent used.

  2. Determination of substances by radiothermometric titration

    International Nuclear Information System (INIS)

    Tolgyessy, J.; Lesny, J.

    1976-01-01

    For determination, nitrogen is bubbled through a solution containing radioactive Kr, Xe, Rn or another aerogen in addition to the substance determined. A continuous or intermittent addition of the titrating solution results in the release of reaction heat, thus increasing the temperature of the reaction mixture, which releases a radioactive gas. Upon reaching the equivalence point, the cold titrating reagent cools the reaction mixture, thus reducing the radioactive substance release. The equivalence point lies at the point of intersection of the extended linear parts of the curve of the dependence of released radioactivity on the volume of the titrating solution added. (M.K.)

  3. Chaos and quantum Fisher information in the quantum kicked top

    International Nuclear Information System (INIS)

    Wang Xiao-Qian; Zhang Xi-He; Ma Jian; Wang Xiao-Guang

    2011-01-01

    Quantum Fisher information is related to the problem of parameter estimation. Recently, a criterion has been proposed for entanglement in multipartite systems based on quantum Fisher information. This paper studies the behaviours of quantum Fisher information in the quantum kicked top model, whose classical correspondence can be chaotic. It finds that, first, detected by quantum Fisher information, the quantum kicked top is entangled whether the system is in chaotic or in regular case. Secondly, the quantum Fisher information is larger in chaotic case than that in regular case, which means, the system is more sensitive in the chaotic case. (general)

  4. Sir Ronald A. Fisher and the International Biometric Society.

    Science.gov (United States)

    Billard, Lynne

    2014-06-01

    The year 2012 marks the 50th anniversary of the death of Sir Ronald A. Fisher, one of the two Fathers of Statistics and a Founder of the International Biometric Society (the "Society"). To celebrate the extraordinary genius of Fisher and the far-sighted vision of Fisher and Chester Bliss in organizing and promoting the formation of the Society, this article looks at the origins and growth of the Society, some of the key players and events, and especially the roles played by Fisher himself as the First President. A fresh look at Fisher, the man rather than the scientific genius is also presented. © 2014, The International Biometric Society.

  5. A Global Estimate of the Number of Coral Reef Fishers.

    Directory of Open Access Journals (Sweden)

    Louise S L Teh

    Full Text Available Overfishing threatens coral reefs worldwide, yet there is no reliable estimate on the number of reef fishers globally. We address this data gap by quantifying the number of reef fishers on a global scale, using two approaches - the first estimates reef fishers as a proportion of the total number of marine fishers in a country, based on the ratio of reef-related to total marine fish landed values. The second estimates reef fishers as a function of coral reef area, rural coastal population, and fishing pressure. In total, we find that there are 6 million reef fishers in 99 reef countries and territories worldwide, of which at least 25% are reef gleaners. Our estimates are an improvement over most existing fisher population statistics, which tend to omit accounting for gleaners and reef fishers. Our results suggest that slightly over a quarter of the world's small-scale fishers fish on coral reefs, and half of all coral reef fishers are in Southeast Asia. Coral reefs evidently support the socio-economic well-being of numerous coastal communities. By quantifying the number of people who are employed as reef fishers, we provide decision-makers with an important input into planning for sustainable coral reef fisheries at the appropriate scale.

  6. A Global Estimate of the Number of Coral Reef Fishers.

    Science.gov (United States)

    Teh, Louise S L; Teh, Lydia C L; Sumaila, U Rashid

    2013-01-01

    Overfishing threatens coral reefs worldwide, yet there is no reliable estimate on the number of reef fishers globally. We address this data gap by quantifying the number of reef fishers on a global scale, using two approaches - the first estimates reef fishers as a proportion of the total number of marine fishers in a country, based on the ratio of reef-related to total marine fish landed values. The second estimates reef fishers as a function of coral reef area, rural coastal population, and fishing pressure. In total, we find that there are 6 million reef fishers in 99 reef countries and territories worldwide, of which at least 25% are reef gleaners. Our estimates are an improvement over most existing fisher population statistics, which tend to omit accounting for gleaners and reef fishers. Our results suggest that slightly over a quarter of the world's small-scale fishers fish on coral reefs, and half of all coral reef fishers are in Southeast Asia. Coral reefs evidently support the socio-economic well-being of numerous coastal communities. By quantifying the number of people who are employed as reef fishers, we provide decision-makers with an important input into planning for sustainable coral reef fisheries at the appropriate scale.

  7. Titrated Misoprostol Versus Dinoprostone for Labor Induction

    African Journals Online (AJOL)

    Aim: This study designed to compare titrated misoprostol regarding its safety and efficacy with dinoprostone for induction of labor. ... Statistical analysis done using Student's t-test for quantitative data and ..... induction: A pilot study. Rev Bras ...

  8. Non-aqueous titration of benzotrifuroxan (BTF)

    Energy Technology Data Exchange (ETDEWEB)

    Selig, W.

    1978-01-01

    This compound can be titrated potentiometrically as an acid with tetrabutylammonium hydroxide in dimethylformamide, dimethylsulfoxide, acetone, pyridine, tetramethylguanidine. The solvent of choice is dimethylformamide which yields the steepest titration curve and the lowest standard deviation. The equivalent weight of benzotrifuroxan is dependent on the solvent used indicating a strong interaction with the solvent. In dimethylformamide, the equivalent weight of benzotrifuroxan is 151.3, corresponding to 1.67 equivalents per mole.

  9. Fisher, Neyman, and Bayes at FDA.

    Science.gov (United States)

    Rubin, Donald B

    2016-01-01

    The wise use of statistical ideas in practice essentially requires some Bayesian thinking, in contrast to the classical rigid frequentist dogma. This dogma too often has seemed to influence the applications of statistics, even at agencies like the FDA. Greg Campbell was one of the most important advocates there for more nuanced modes of thought, especially Bayesian statistics. Because two brilliant statisticians, Ronald Fisher and Jerzy Neyman, are often credited with instilling the traditional frequentist approach in current practice, I argue that both men were actually seeking very Bayesian answers, and neither would have endorsed the rigid application of their ideas.

  10. Sports fishers against Kernkraftwerk Grohnde: No success

    Energy Technology Data Exchange (ETDEWEB)

    1980-09-01

    With its decision of 18 July 1980, the Lueneburg Higher Administrative Court has dismissed the action of ten sport fishers' clubs against the decision of the Hanover Administrative Court of 2 June 1977 which had refused their application to re-establish the suspensive power of their actions against the enforceable first part-construction permit for Kernkraftwerk Grohnde on the Weser River. The Lueneburg Higher Administrative Court confirms the legality of the decision for immediate enforcement of nuclear construction permits as far as there is no irreparable damage to the rights of those concerned. The binding force of the decision concerning the site in the first part-construction permit is mentioned.

  11. Fisher information framework for time series modeling

    Science.gov (United States)

    Venkatesan, R. C.; Plastino, A.

    2017-08-01

    A robust prediction model invoking the Takens embedding theorem, whose working hypothesis is obtained via an inference procedure based on the minimum Fisher information principle, is presented. The coefficients of the ansatz, central to the working hypothesis satisfy a time independent Schrödinger-like equation in a vector setting. The inference of (i) the probability density function of the coefficients of the working hypothesis and (ii) the establishing of constraint driven pseudo-inverse condition for the modeling phase of the prediction scheme, is made, for the case of normal distributions, with the aid of the quantum mechanical virial theorem. The well-known reciprocity relations and the associated Legendre transform structure for the Fisher information measure (FIM, hereafter)-based model in a vector setting (with least square constraints) are self-consistently derived. These relations are demonstrated to yield an intriguing form of the FIM for the modeling phase, which defines the working hypothesis, solely in terms of the observed data. Cases for prediction employing time series' obtained from the: (i) the Mackey-Glass delay-differential equation, (ii) one ECG signal from the MIT-Beth Israel Deaconess Hospital (MIT-BIH) cardiac arrhythmia database, and (iii) one ECG signal from the Creighton University ventricular tachyarrhythmia database. The ECG samples were obtained from the Physionet online repository. These examples demonstrate the efficiency of the prediction model. Numerical examples for exemplary cases are provided.

  12. Theory of titration curves-VII The properties of derivative titration curves for strong acid-strong base and other isovalent ion-combination titrations.

    Science.gov (United States)

    Meites, T; Meites, L

    1970-06-01

    This paper deals with isovalent ion-combination titrations based on reactions that can be represented by the equation M(n+) + X(n-) --> MX, where the activity of the product MX is invariant throughout a titration, and with the derivative titration curves obtained by plotting d[M(+)]/dfversus f for such titrations. It describes some of the ways in which such curves can be obtained; it compares and contrasts them both with potentiometric titration curves, which resemble them in shape, and with segmented titration curves, from which they are derived; and it discusses their properties in detail.

  13. Kapitalismus versus Marktwirtschaft. Karl Marx und Fernand Braudel

    OpenAIRE

    Faber, Malte; Petersen, Thomas

    2018-01-01

    Since the beginning of the finance crisis, the notion of capitalism and the adjective capitalistic are more and more employed in public discourse without making an attempt to define it. In contrast, the concept of market economy is less used. We try in this paper to differentiate both concepts by going back to the approaches by Karl Marx (1818-1883) and Fernand Braudel (1902-1985). Marx does not use the term capitalism but only capitalistic production, while Braudel argues on the basis of a w...

  14. Epistemological anarchism of Paul Karl Feyerabend and medical education

    Directory of Open Access Journals (Sweden)

    Andréia Patrícia Gomes

    Full Text Available The thoughts of the philosopher Paul Karl Feyerabend brought important contributions to the debate on Science in the 20th century. Most recently his views about non-existence of a single method for doing science have been employed to rethink science education and propose the use of multiple methods for effective teaching-learning process. This article employs the theoretical framework of the author expressed in the book Against Method, 1977, about the epistemological anarchism and the methodological pluralism and uses it in the contemporary discussion of medical education.

  15. Karl pearson the scientific life in a statistical age

    CERN Document Server

    Porter, Theodore M

    2010-01-01

    Karl Pearson, founder of modern statistics, came to this field by way of passionate early studies of philosophy and cultural history as well as ether physics and graphical geometry. His faith in science grew out of a deeply moral quest, reflected also in his socialism and his efforts to find a new basis for relations between men and women. This biography recounts Pearson's extraordinary intellectual adventure and sheds new light on the inner life of science. Theodore Porter's intensely personal portrait of Pearson extends from religious crisis and sexual tensions to metaphysical and even m

  16. El racionalismo crítico de Karl Popper

    Directory of Open Access Journals (Sweden)

    Luis María Delio Machado

    2015-10-01

    Full Text Available El presente artículo, pretende acercar algunos de los aspectos más importantes del pensamiento de uno de los filósofos más destacados de nuestro tiempo: Sir Karl Popper. Su presencia atraviesa nuestro siglo, presentándose como una de las voces visionarias y anticipadoras que se alzaron críticamente, contra toda actitud o acción que estuviese fundada en lo dogmático y que tuviese como finalidad, el olvido o la superación del individuo, aunque dicho olvido estuviese "justificado" por oraculares "bienes o fines superiores". (... 

  17. [Karl Marx and the Malthusian theory of population].

    Science.gov (United States)

    Jaggi, S

    1985-06-01

    An analysis of the works of Karl Marx is presented in order to demonstrate the importance of the population factor. The author contends that population growth is a critical factor in Marx's theory of the progressive impoverishment of the working class. However, because of his reluctance to acknowledge the value of the Malthusian contribution, Marx focused his analysis of the labor force under capitalism on the demand for workers and neglected the supply side, which is determined by the growth of population. The author concludes that Marxist theory would have benefited from greater consideration of Malthusian theory.

  18. Wie is die sondaar? Die beskouing van Karl Barth

    OpenAIRE

    F. J. van Zyl

    1994-01-01

    Who is the sinner? The view of Karl Barth The previous article dealt with Barth’s view of the knowledge and real essence of sin, while this one focus on his view of the human being as sinner. In accordance with his christological approach to all theological matters, Barth presents us with a description of the image and character of the sinner as mirrored by the obedient suffering and death of Jesus Christ on the cross in the place of all sinners of all times - past, present and future. Th...

  19. Karl Nagel : Pain things = Pain things / Eha Komissarov

    Index Scriptorium Estoniae

    Komissarov, Eha, 1947-

    2007-01-01

    Maali- ja videokunstnik Karl Nagelist kui probleemsest nüüdisaegsest kunstnikust, kes võtab provokatiivseid positsioone ideoloogiate ja poliitika küsimustes. Tema kunstnikupositsioon keerleb terrorismi, fašismi ja natsionalismi ümber, dissidendi positsioonile asununa on ta käsitlenud surma ja vägivalla teemat (Tšetšeenia sõda) ja üritanud sõna võtta ka kodanikuvabaduste laiendamise nimel. Sotsiaalse tegelikkuse ja kunsti vastandlikkuse küsimuses on ta võtnud nulltoleratsi taotleva seisukoha, võrdlemata kunsti tegelikkusega

  20. Coulometric titration at low temperatures-nonstoichiometric silver selenide

    OpenAIRE

    Beck, Gesa K.; Janek, Jürgen

    2003-01-01

    A modified coulometric titration technique is described for the investigation of nonstoichiometric phases at low temperatures. It allows to obtain titration curves at temperatures where the conventional coulometric titration technique fails because of too small chemical diffusion coefficients of the mobile component. This method for indirect coulometric titration is applied to silver selenide between -100 and 100 °C. The titration curves are analyzed on the basis of a defect chemical model an...

  1. A generalized approach for the calculation and automation of potentiometric titrations Part 2. Redox Titrations

    NARCIS (Netherlands)

    Stur, J.; Bos, M.; van der Linden, W.E.

    1984-01-01

    The very fast calculation procedure described earlier is applied to calculate the titration curves of complicated redox systems. The theory is extended slightly to cover inhomogeneous redox systems. Titrations of iodine or 2,6-dichloroindophenol with ascorbic acid are described. It is shown that

  2. End-point construction and systematic titration error in linear titration curves-complexation reactions

    NARCIS (Netherlands)

    Coenegracht, P.M.J.; Duisenberg, A.J.M.

    The systematic titration error which is introduced by the intersection of tangents to hyperbolic titration curves is discussed. The effects of the apparent (conditional) formation constant, of the concentration of the unknown component and of the ranges used for the end-point construction are

  3. Sports fishers against Kernkraftwerk Grohnde: No success

    International Nuclear Information System (INIS)

    Anon.

    1980-01-01

    With its decision of 18 July 1980, the Lueneburg Higher Administrative Court has dismissed the action of ten sport fishers' clubs against the decision of the Hanover Administrative Court of June 2 June 1977 which had refused their application to re-establish the suspensive power of their actions against the enforceable first part-construction permit for Kernkraftwerk Grohnde on the Weser River. The Lueneburg Higher Administrative Court confirms the legality of the decision for immediate enforcement of nuclear construction permits as far as there is no irreparable damage to the rights of those concerned. The binding force of the decision concerning the site in the first part-construction permit is mentioned. (HSCH) [de

  4. KARL RAHNER, UM INQUIETO TEÓLOGO ECUMÊNICO

    Directory of Open Access Journals (Sweden)

    Mario de França Miranda

    2004-01-01

    Full Text Available O artigo apresenta, em grandes linhas, o pensamento ecumênico de Karl Rahner. No novo contexto aberto pelo Concílio Vaticano II, este teólogo defronta-se com as dificuldades de cunho sociocultural, doutrinário e institucional, que dividem as Igrejas cristãs. Enfatizando a centralidade da fé em Jesus Cristo, vivida com autenticidade, pleiteia uma única Igreja Católica, na qual estejam presentes, com sua rica diversidade, as demais Igrejas. Suas reflexões se revelam pertinentes para as Igrejas cristãs na América Latina. ABSTRACT: This article presents Karl Rahner’s ecumenical views. With the new context introduced by the Vatican Council II, Rahner faces the social-cultural, doctrinal and institutional difficulties dividing the Christian Churches. Rahner emphasizes the centrality of faith in Jesus Christ lived with authenticity, and proposes one Catholic Church in which the other Churches may be present with their rich diversity. His reflections are revealed as pertinent to the Christian Churches in Latin America

  5. An accurate potentiometric titration of 5-25 mg uranium

    International Nuclear Information System (INIS)

    Slanina, J.; Bakker, F.; Lingerak, W.A.

    1976-01-01

    A potentiometric titration of 5 to 25 mg uranium is described. Sulphamic and phosphoric acid are added to the sample (volume 1 ml), U VI is reduced to U IV by Fe 2+ and the excess of Fe 2+ is oxidized by a mixture of nitric acid, sulphamic acid and ammonium molybdate; vanadyl sulphate is added to ensure a sharp end-point of the titration. The resultant U IV is titrated automatically with 0.02500N potassiumdichromate using a platinum indicator electrode. The automatic titration is performed both with a commercial titrator (Mettler) and with an R.C.N. titrator which waits after each addition until the equilibrium is reached. Using the Mettler titrator an accuracy of 0.05% relative was reached. The R.C.N. setpoint titrator gave results with an accuracy of 0.04% relative at the 20-mg U level. Each titration takes 5 to 7 min. (author)

  6. Philosophy and phylogenetic inference: a comparison of likelihood and parsimony methods in the context of Karl Popper's writings on corroboration.

    Science.gov (United States)

    de Queiroz, K; Poe, S

    2001-06-01

    Advocates of cladistic parsimony methods have invoked the philosophy of Karl Popper in an attempt to argue for the superiority of those methods over phylogenetic methods based on Ronald Fisher's statistical principle of likelihood. We argue that the concept of likelihood in general, and its application to problems of phylogenetic inference in particular, are highly compatible with Popper's philosophy. Examination of Popper's writings reveals that his concept of corroboration is, in fact, based on likelihood. Moreover, because probabilistic assumptions are necessary for calculating the probabilities that define Popper's corroboration, likelihood methods of phylogenetic inference--with their explicit probabilistic basis--are easily reconciled with his concept. In contrast, cladistic parsimony methods, at least as described by certain advocates of those methods, are less easily reconciled with Popper's concept of corroboration. If those methods are interpreted as lacking probabilistic assumptions, then they are incompatible with corroboration. Conversely, if parsimony methods are to be considered compatible with corroboration, then they must be interpreted as carrying implicit probabilistic assumptions. Thus, the non-probabilistic interpretation of cladistic parsimony favored by some advocates of those methods is contradicted by an attempt by the same authors to justify parsimony methods in terms of Popper's concept of corroboration. In addition to being compatible with Popperian corroboration, the likelihood approach to phylogenetic inference permits researchers to test the assumptions of their analytical methods (models) in a way that is consistent with Popper's ideas about the provisional nature of background knowledge.

  7. Efficiency of methods for Karl Fischer determination of water in oils based on oven evaporation and azeotropic distillation.

    Science.gov (United States)

    Larsson, William; Jalbert, Jocelyn; Gilbert, Roland; Cedergren, Anders

    2003-03-15

    The efficiency of azeotropic distillation and oven evaporation techniques for trace determination of water in oils has recently been questioned by the National Institute of Standards and Technology (NIST), on the basis of measurements of the residual water found after the extraction step. The results were obtained by volumetric Karl Fischer (KF) titration in a medium containing a large excess of chloroform (> or = 65%), a proposed prerequisite to ensure complete release of water from the oil matrix. In this work, the extent of this residual water was studied by means of a direct zero-current potentiometric technique using a KF medium containing more than 80% chloroform, which is well above the concentration recommended by NIST. A procedure is described that makes it possible to correct the results for dilution errors as well as for chemical interference effects caused by the oil matrix. The corrected values were found to be in the range of 0.6-1.5 ppm, which should be compared with the 12-34 ppm (uncorrected values) reported by NIST for the same oils. From this, it is concluded that the volumetric KF method used by NIST gives results that are much too high.

  8. How the integration of fishers' perception on environment in a ...

    African Journals Online (AJOL)

    The objectives of this study are to examine both the significance of fishers' perceptions regarding environmental degradation into their adoption of new behavior and how perceptions themselves are influenced by environmental perception and production. The study is based on data from 200 fishers in the north-east of ...

  9. Fisher-Renyi entropy product and information plane

    International Nuclear Information System (INIS)

    Romera, E.; Nagy, A.

    2008-01-01

    Connection between Fisher information and Renyi entropy has been established. This link allows us to define the Fisher-Renyi information plane and an entropic product in terms of these quantities. New Renyi uncertainty relations are obtained for single particle densities of many particle systems in position-momentum conjugate spaces

  10. Fisher research in the US Rocky Mountains: A critical overview

    Science.gov (United States)

    Michael Schwartz; J. Sauder

    2013-01-01

    In this talk we review the recent fisher research and monitoring efforts that have occurred throughout Idaho and Montana in past 2 decades. We begin this talk with a summary of the habitat relationship work that has examined fisher habitat use at multiple scales. These have largely been conducted using radio and satellite telemetry, although a new, joint effort to use...

  11. Quantifying fishers' and citizens' support for Dutch flatfish management policy

    NARCIS (Netherlands)

    Groeneveld, R.A.

    2011-01-01

    Fisheries policy is most effective when supported by fishers and the general public. Dutch citizens' and fishers' support for a selection of policy alternatives to enhance the sustainability of the Dutch North Sea cutter fleet is estimated, and the same groups' support for policy alternatives is

  12. ON THE TURNOVER OF THE TULLY-FISHER RELATION

    NARCIS (Netherlands)

    RHEE, MH; PELETIER, RF; VANALBADA, TS

    1995-01-01

    The observed turnover at the high linewidth end of the infrared Tully-Fisher relation can be explained by the stellar population differences among galaxies. When the IRAS 60 mu m fluxes are added to the Tully-Fisher relation as a second parameter, the turnover disappears and the scatter becomes

  13. With the worldwide decline in conventional finfish stocks, fishers are ...

    African Journals Online (AJOL)

    With the worldwide decline in conventional finfish stocks, fishers are redirecting their attention to alter- native stocks, in particular invertebrates (Perry et al. 1999). Initiatives towards developing small-scale commercial fisheries, aimed at supporting previously disadvantaged fishers and targeting previously under- exploited ...

  14. Uneven adaptive capacity among fishers in a sea of change.

    Directory of Open Access Journals (Sweden)

    Joshua S Stoll

    Full Text Available Fishers worldwide operate in an environment of uncertainty and constant change. Their ability to manage risk associated with such uncertainty and subsequently adapt to change is largely a function of individual circumstances, including their access to different fisheries. However, explicit attention to the heterogeneity of fishers' connections to fisheries at the level of the individual has been largely ignored. We illustrate the ubiquitous nature of these connections by constructing a typology of commercial fishers in the state of Maine based on the different fisheries that fishers rely on to sustain their livelihoods and find that there are over 600 combinations. We evaluate the adaptive potential of each strategy, using a set of attributes identified by fisheries experts in the state, and find that only 12% of fishers can be classified as being well positioned to adapt in the face of changing socioeconomic and ecological conditions. Sensitivity to the uneven and heterogeneous capacity of fishers to manage risk and adapt to change is critical to devising effective management strategies that broadly support fishers. This will require greater attention to the social-ecological connectivity of fishers across different jurisdictions.

  15. Isothermal Titration Calorimetry in the Student Laboratory

    Science.gov (United States)

    Wadso, Lars; Li, Yujing; Li, Xi

    2011-01-01

    Isothermal titration calorimetry (ITC) is the measurement of the heat produced by the stepwise addition of one substance to another. It is a common experimental technique, for example, in pharmaceutical science, to measure equilibrium constants and reaction enthalpies. We describe a stirring device and an injection pump that can be used with a…

  16. Titration Calculations with Computer Algebra Software

    Science.gov (United States)

    Lachance, Russ; Biaglow, Andrew

    2012-01-01

    This article examines the symbolic algebraic solution of the titration equations for a diprotic acid, as obtained using "Mathematica," "Maple," and "Mathcad." The equilibrium and conservation equations are solved symbolically by the programs to eliminate the approximations that normally would be performed by the student. Of the three programs,…

  17. NBL-Davies-Gray weight titration method

    International Nuclear Information System (INIS)

    Hassell, C.

    1981-01-01

    The titration method for uranium consists of the following basic steps: reduction of U +6 to U +4 by Fe +2 ; selective oxidation of excess Fe +2 by HNO 3 with Mo +6 catalyst, all in strong phosphoric acid solution; and titration of the U +4 with standard dichromate after dilution. In this paper, detailed procedure of the NBL method, its modification to a gravimetric system or weight titration technique, and miniaturization of the NBL titrimetric method are discussed. Improved precisions and accuracy (2 to 3 times), of the gravimetric titrant delivery has made it possible to reduce the amount of uranium taken for each analysis. At present, using gravimetric delivery, most samples are titrated in the 30 to 50 mg range. Improved precision has led to investigating the possibility of a scaled-down version of the basic method so as to reduce the volume of phosphoric acid waste generated. Because all reactions are carried out in the same vessel, this method can be automated. Analysts at NBL have been able to restrict error to 0.05% or better in the 30 to 100 mg range using the basic procedure

  18. Acid Rain Analysis by Standard Addition Titration.

    Science.gov (United States)

    Ophardt, Charles E.

    1985-01-01

    The standard addition titration is a precise and rapid method for the determination of the acidity in rain or snow samples. The method requires use of a standard buret, a pH meter, and Gran's plot to determine the equivalence point. Experimental procedures used and typical results obtained are presented. (JN)

  19. Quantifying quantum coherence with quantum Fisher information.

    Science.gov (United States)

    Feng, X N; Wei, L F

    2017-11-14

    Quantum coherence is one of the old but always important concepts in quantum mechanics, and now it has been regarded as a necessary resource for quantum information processing and quantum metrology. However, the question of how to quantify the quantum coherence has just been paid the attention recently (see, e.g., Baumgratz et al. PRL, 113. 140401 (2014)). In this paper we verify that the well-known quantum Fisher information (QFI) can be utilized to quantify the quantum coherence, as it satisfies the monotonicity under the typical incoherent operations and the convexity under the mixing of the quantum states. Differing from most of the pure axiomatic methods, quantifying quantum coherence by QFI could be experimentally testable, as the bound of the QFI is practically measurable. The validity of our proposal is specifically demonstrated with the typical phase-damping and depolarizing evolution processes of a generic single-qubit state, and also by comparing it with the other quantifying methods proposed previously.

  20. Karl Heinrich Ulrichs: First Theorist of Erotic Age Orientation.

    Science.gov (United States)

    Janssen, Diederik F

    2017-01-01

    The nomination of Karl Heinrich Ulrichs (1825-1895) as the first theorist of homosexuality may be placed in the oblique light of his eligibility for the nomination as the first theorist of erotic age orientation. In Ulrichs's pamphlets, "man-manly" homosexuality emerged as a particular age orientation, with a subsequent typological breakdown that, importantly, blended gender orientation and age orientation. Into the early 20th century, erotic age orientation remained bound up with the classification and emancipation of what here was demarcated as Urningsliebe. Ulrichs's pioneering and shifting comments on age eventually fed into his legal model of consenting adults in private. They also provide a starting point for the historical understanding of the trope of "grooming pedophile" as it, arguably, crossfaded with that of the "seducing homosexual" after the latter's depsychiatricization across the Western world.

  1. KARL GOOSS AND A TEMPLE OF JUPITER IN APULUM

    Directory of Open Access Journals (Sweden)

    Csaba Szabó

    2015-12-01

    Full Text Available Karl Gooss (1844-1881 was one of the few intellectuals of his time who witnessed personally the building of the railway and the ditch of Alba Iulia between 1865 and 1868. The construction was the biggest project of the city since the building of the Vauban fort and destroyed the most significant part of the Colonia Aurelia Apulensis, one of the biggest urban centers of the province. During these works, Gooss witnessed the discovery and destruction of the first Jupiter temple attested in Dacia, the biggest silver deposit ever found in Transylvania and the first coin hoard of Apulum. His German publication was ignored by the later historiography, although it is the first and only detailed account of the archaeological finds discovered in the Partoș in the end of August, 1867. His detailed account helps us to identify the context of some well known artifacts and to reconsider the topography of the Colonia Aurelia Apulensis.

  2. Karl Heinz Göller (1924-2009: in memoriam

    Directory of Open Access Journals (Sweden)

    Janez Stanonik

    2010-12-01

    Full Text Available The study is written in memory of Karl Heinz Göller, Professor of English literature at the Regensburg University, who died in Kelheim near Regensburg on 22nd April 2009. University of Regenburg was founded in 1967, and Göller was the first Dean of its Faculty of Philosophy. For more than 40 years he worked for the development of good contacts betwen the universities of Regensburg and Ljubljana. Since 2000 he was member of the Advisory Committee of the review Acta Neophilologica. In 1983 he founded the Society of German Mediaevalists, one of the leading societies of German scholars from the whole Germany, and was elected its first president. The study gives report on the development of Göller as a scholar, and his basic achievement in his research, pedagogical work and in university administration.

  3. The origin of art according to Karl von den Steinen

    Directory of Open Access Journals (Sweden)

    Pierre Déléage

    2015-06-01

    Full Text Available Based on a study of the custom, adopted by ethnologists in the early 20th century, of asking Amerindians of Lowland South America to do drawings in pencil in their notebooks, I explore three forgotten fragments of the history of thinking: the intense debates on the origin of ornaments, opposing an evolutionist and a materialist approach at the end of the 19th century; the theories on the origin of figuration, which I show date back to the important work of Karl von den Steinen regarding the populations of central Brazil; and the publications of ethnologists’ portraits drawn by Indians of the lowlands of South America, a little-known tradition of reverse anthropology serving as a counterpoint to the study of the reception of Amerindian art in Western ethnological literature.

  4. Descriptive psychopathology, phenomenology, and the legacy of Karl Jaspers.

    Science.gov (United States)

    Häfner, Heinz

    2015-03-01

    With his early publications (1910-1913), Karl Jaspers created a comprehensive methodological arsenal for psychiatry, thus laying the foundation for descriptive psychopathology. Following Edmund Husserl, the founder of philosophical phenomenology, Jaspers introduced phenomenology into psychopathology as "static understanding," ie, the unprejudiced intuitive reproduction (Vergegenwärtigung) and description of conscious phenomena. In a longitudinal perspective, "genetic understanding" based on empathy reveals how mental phenomena arise from mental phenomena. Severance in understanding of, or alienation from, meaningful connections is seen as indicating illness or transition of a natural development into a somatic process. Jaspers opted for philosophy early. After three terms of law, he switched to studying medicine, came to psychopathology after very little training in psychiatry; to psychology without ever studying psychology; and to a chair in philosophy without ever studying philosophy. In the fourth and subsequent editions of his General Psychopathology, imbued by his existential philosophy, Jaspers partly abandoned the descriptive method.

  5. Psychoanalysis, science and the seductive theory of Karl Popper.

    Science.gov (United States)

    Grant, Don C; Harari, Edwin

    2005-06-01

    To present a critique of the ideas of Karl Popper, the philosopher of science, whose depiction of psychoanalysis as a pseudoscience is often used to justify attacks on psychoanalysis. Published sources are used to provide a brief intellectual biography of Popper, a summary of his concept of science and a summary of criticisms of Popper's view of science. His depiction of psychoanalysis and Freud's reply are presented. Clinical, experimental and neurobiological research which refutes Popper's view is summarized. There is a vast scholarly published work critical of Popper's falsifiability criterion of science. Less recognized is Popper's misunderstanding and misrepresentation of psychoanalysis; his argument against it is logically flawed and empirically false. Even if Popper's theory of science is accepted, there is considerable clinical, experimental and neurobiological research in psychoanalysis which meets Popper's criterion of science. Attacks on psychoanalysis based on Popper's theory of science are ill-founded and reflect inadequate scholarship.

  6. Karl Popper: antes y después de Kyoto

    Directory of Open Access Journals (Sweden)

    Zanotti, Gabriel

    1999-06-01

    Full Text Available Not available.En su último libro sobre Karl Popper, Mariano Artigas plantea una hermenéutica revolucionaria: muestra que la ética de Popper es el fundamento de su epistemología, y que el fundamento de esa ética está lejos del «conjeturalismo» que suele atribuirse a Popper. Artigas analiza qué significa en Popper la «fe irracional en la razón» y utiliza, como fuente inédita, el dramático relato que hace Popper de su relación con W. W. Bartley, por primera vez, en Kyoto, en 1992. Sea cual fuere la opinión del lector, el libro de Artigas divide la hermenéutica de Popper en un antes y un después.

  7. Sir Karl Popper and his philosophy of physics

    Science.gov (United States)

    Jammer, Max

    1991-12-01

    The eminent mathematical physicist Sir Hermann Bondi once said: “There is no more to science than its method, and there is no more to its method than Popper has said.” Indeed, many regard Sir Karl Raimund Popper the greatest philosopher of science in our generation. Much of what Popper “has said” refers to physics, but physicists, generally speaking, have little knowledge of what he has said. True, Popper's philosophy of science and, in particular, his realistic interpretation of quantum mechanics deviates considerably from the generally accepted doctrine. But as Popper, rightly I think, points out, it is precisely the proliferation of divergent theories which promotes the growth of scientific knowledge; it would be a danger for physics if physicists were dogmatically tied to a single theory or would not test their theory against alternatives. It is for this purpose that, on the occasion of the nonagenarian celebration of Popper's birthday, the present essay has been written.

  8. Karl Marx e a Revolução Russa

    Directory of Open Access Journals (Sweden)

    Angelo Segrillo

    Full Text Available Resumo O artigo analisa a visão de Karl Marx sobre a possibilidade de ocorrência da revolução na Rússia. Inicialmente concentrando suas esperanças nos países da Europa Ocidental, onde o capitalismo estava mais desenvolvido, com o fracasso das revoluções de 1948 e da Comuna de Paris, Marx se volta para as possibilidades de revolução a partir do Leste, da Rússia, até ali considerada o bastião da reação. Suas ideias são expostas em correspondência com os próprios revolucionários russos. Essa trajetória intelectual de Marx é descrita a partir de seus próprios escritos.

  9. Wie is die sondaar? Die beskouing van Karl Barth

    Directory of Open Access Journals (Sweden)

    F. J. van Zyl

    1994-01-01

    Full Text Available Who is the sinner? The view of Karl Barth The previous article dealt with Barth’s view of the knowledge and real essence of sin, while this one focus on his view of the human being as sinner. In accordance with his christological approach to all theological matters, Barth presents us with a description of the image and character of the sinner as mirrored by the obedient suffering and death of Jesus Christ on the cross in the place of all sinners of all times - past, present and future. The price that God paid in surrendering his only Son to such suffering, indicates the enormous guilt and baseness of every sinner. Every human being is utterly insolvent and can only be delivered from sin through God’s graceful remission of siru

  10. O marxismo antidogmático de Karl Korsch

    Directory of Open Access Journals (Sweden)

    Nildo Viana

    2013-06-01

    Full Text Available O presente artigo tematiza o marxismo de Karl Korsch, focalizando seu caráter não dogmático. A partir de um resgate do caráter crítico e revolucionário do marxismo de Marx, Korsch realiza uma crítica radical ao revisionismo e leninismo. Para tal, ele não só resgata o verdadeiro caráter da dialética marxista e da concepção materialista da história, como exige a coerência dessa concepção ao defender o princípio de aplicação dela a si mesma. Assim ele lança as bases de um marxismo não dogmático, para o qual é o vínculo com o proletariado que mostra o caráter do marxismo e não ideologias petrificadas. Abstract: This article thematizes Marxism of Karl Korsch, focusing on its non dogmatic. From a rescue of criticality and revolutionary Marxism of Marx, Korsch performs a radical critique of revisionism and Leninism. To do so, he not only rescues the true character of Marxist dialectics and materialist conception of history, as this concept requires consistency in defending the principle of applying it to herself. So he lays the foundations of a non-dogmatic Marxism, to which is the bond with the proletariat that shows the character of Marxism and not petrified ideologies. Key words: Marxism, dogmatism, criticism, historical materialism, dialectical.

  11. An Olfactory Indicator for Acid-Base Titrations.

    Science.gov (United States)

    Flair, Mark N.; Setzer, William N.

    1990-01-01

    The use of an olfactory acid-base indicator in titrations for visually impaired students is discussed. Potential olfactory indicators include eugenol, thymol, vanillin, and thiophenol. Titrations performed with each indicator with eugenol proved to be successful. (KR)

  12. Potentiometric titration curves of aluminium salt solutions and its ...

    African Journals Online (AJOL)

    Potentiometric titration curves of aluminium salt solutions and its species conversion ... of aluminium salt solutions under the moderate slow rate of base injection. ... silicate radical, and organic acid radical on the titration curves and its critical ...

  13. An Assesment on the Three Worlds Theories of Karl Popper and Jürgen Habermas

    Directory of Open Access Journals (Sweden)

    Vildan İyigüngör

    2015-11-01

    Full Text Available In this study, it is aimed to outline “three world theories” of Karl Popper and Jürgen Habermas comparatively. In this context, it is also aimed to assess Habermas’ critics as “positivist” to Karl Popper who is an opponent to positivism inside it and his abstraction on the “three world theory” under the influence of Karl Popper. The differences between their opinions stem from their main arguments about the methodology of natural and social sciences.

  14. Microculture virus titration--a simple colourimetric assay for influenza virus titration.

    Science.gov (United States)

    Levi, R; Beeor-Tzahar, T; Arnon, R

    1995-03-01

    Influenza antigens can be detected by several well established methods. However, when it is important to determine the titre of infective virions, a bioassay should be employed. The standard and the most widely used tests for influenza infectivity are titration carried out in embryonated hen eggs, or the plaque assay employing tissue culture techniques. A simple colourimetric assay for influenza virus detection and titration is described. Samples of allantoic fluid or mice lung homogenates were used to infect MDCK cultures in microplate wells. After an incubation period, the tetrazolium (MTT) colourimetric assay was used to determine cell viability, and when compared to untreated culture control enabled the detection and titration of several influenza strains. When samples were assayed simultaneously in embryonated eggs and by the MCVT method, good correlation in determined titres was obtained. The availability of an additional method for influenza titration allows more flexibility in the choice of titration method according to the specific needs of the study. Furthermore, this method lends itself to full automatization. Similar procedures should also be applicable to titration of other cytopathic viruses.

  15. Ion-selective electrodes in potentiometric titrations; a new method for processing and evaluating titration data.

    Science.gov (United States)

    Granholm, Kim; Sokalski, Tomasz; Lewenstam, Andrzej; Ivaska, Ari

    2015-08-12

    A new method to convert the potential of an ion-selective electrode to concentration or activity in potentiometric titration is proposed. The advantage of this method is that the electrode standard potential and the slope of the calibration curve do not have to be known. Instead two activities on the titration curve have to be estimated e.g. the starting activity before the titration begins and the activity at the end of the titration in the presence of large excess of titrant. This new method is beneficial when the analyte is in a complexed matrix or in a harsh environment which affects the properties of the electrode and the traditional calibration procedure with standard solutions cannot be used. The new method was implemented both in a method of linearization based on the Grans's plot and in determination of the stability constant of a complex and the concentration of the complexing ligand in the sample. The new method gave accurate results when using titrations data from experiments with samples of known composition and with real industrial harsh black liquor sample. A complexometric titration model was also developed. Copyright © 2015 Elsevier B.V. All rights reserved.

  16. Co-existence of Fisheries and Marine Renewable Energy: The Spotlight on Fishers and Fishers' Knowledge (FK)

    Science.gov (United States)

    Campbell, M. S.; Ashley, M.; De Groot, J.; Rodwell, L.

    2016-02-01

    As an emerging industry, Marine Renewable Energy (MRE) is expected to play a major contributory role if the UK is to successfully reach it's desired target of renewable energy production by 2020. However, due to the competing objectives and priorities of MRE and other industries, for example fisheries, and in the delivering of conservation measures, the demand for space within our marine landscape is increasing, and interactions are inevitable. A semi structured interview was conducted with forty fishers across the UK to elicit further information on the challenges, barriers to progress and priority issues these fishers face in relation to MRE development. The questionnaire also included a fisher assessment of the mitigation agenda developed by de Groot et al. (2014) under the Natural Environment Research Council Marine Renewable Energy Knowledge Exchange Programme ( NERC MREKEP). Qualitative data were extracted and analysed using the text analysis software NVivo8. Fishers identified barriers to progress, and in order of the most important themes included; policy, consultation, trust, lack of knowledge, true representation of all fishers, science vs. fisher observation mismatch and timescales. Priority issues identified in order of importance were; displacement or loss of access, cable disturbance, timings of installation/repairs, effects on the seabed and specifically offshore windfarm (OWF) sitting. The consultation process caused discontent among all fishers interviewed. In relation to working towards a collaborative mitigation agenda, fishers highlighted issues of trust in relation to; trans-boundary management, data management and the consultation process. At all stages of the research, the response rate of the importance of gathering fishers' knowledge (FK) was high. Fishers underlined the importance of this data source in assessing the impacts of MRE on the sectors of the UK fleet. Thus, although at an early stage of development, an initial framework for the

  17. Engaging recreational fishers in management and conservation: global case studies.

    Science.gov (United States)

    Granek, E F; Madin, E M P; Brown, M A; Figueira, W; Cameron, D S; Hogan, Z; Kristianson, G; de Villiers, P; Williams, J E; Post, J; Zahn, S; Arlinghaus, R

    2008-10-01

    Globally, the number of recreational fishers is sizeable and increasing in many countries. Associated with this trend is the potential for negative impacts on fish stocks through exploitation or management measures such as stocking and introduction of non-native fishes. Nevertheless, recreational fishers can be instrumental in successful fisheries conservation through active involvement in, or initiation of, conservation projects to reduce both direct and external stressors contributing to fishery declines. Understanding fishers' concerns for sustained access to the resource and developing methods for their meaningful participation can have positive impacts on conservation efforts. We examined a suite of case studies that demonstrate successful involvement of recreational fishers in conservation and management activities that span developed and developing countries, temperate and tropical regions, marine and freshwater systems, and open- and closed-access fisheries. To illustrate potential benefits and challenges of involving recreational fishers in fisheries management and conservation, we examined the socioeconomic and ecological contexts of each case study. We devised a conceptual framework for the engagement of recreational fishers that targets particular types of involvement (enforcement, advocacy, conservation, management design [type and location], research, and monitoring) on the basis of degree of stakeholder stewardship, scale of the fishery, and source of impacts (internal or external). These activities can be enhanced by incorporating local knowledge and traditions, taking advantage of leadership and regional networks, and creating collaborations among various stakeholder groups, scientists, and agencies to maximize the probability of recreational fisher involvement and project success.

  18. Potentiometric determination of milligram amounts of uranium by semiautomatic titrator

    International Nuclear Information System (INIS)

    Ryzhinskij, M.V.; Stepanov, A.V.; Preobrazhenskaya, L.D.; Solntseva, L.F.; Gromova, E.A.

    1978-01-01

    A semiautomatic titrator is described which allows gravimetriotentiometricc-p titrat mg amounts of substances. Milligram amounts of uranium (absolute contents and oxygen/uranium ratio) in U 3 O 8 were determined as an example of the titrator action. The relative standard deviation was less than 0.001

  19. Simple and Automated Coulometric Titration of Acid Using Nonisolated Electrodes

    Science.gov (United States)

    Kuntzleman, Thomas S.; Kenney, Joshua B.; Hasbrouck, Scott; Collins, Michael J.; Amend, John R.

    2011-01-01

    Coulometric titrations involve the quantification of analyte by measurements of current and time. In most coulometric titrations, the anode and cathode are placed in isolated cells that are connected by a salt bridge. By contrast, the experiments described here involve coulometric titrations (of acidic protons in solution) using a silver anode and…

  20. Seymour Fisher contributions to research on body image

    Directory of Open Access Journals (Sweden)

    P.R.L. Ribeiro

    2011-01-01

    Full Text Available The aim of this work was to systematically review Seymour Fisher contributions to research on body image. A literature review of his work on body perception, distorted body image, body boundary, assigned meanings to specific body areas, and general body awareness was carried out on four of the books written by the author. Fisher correlated those variables with defense mechanisms, adaptation, and body anxiety. Moreover, he also considered the roles played by culture and personality on the complex phenomenon of body experience. This review intends to disseminate Seymour Fisher contributions among Brazilian researchers on body image.

  1. Alles Leben ist Problemlösen: Zum 100. Geburtstag von Karl Raimund Popper

    OpenAIRE

    Kirchgässner, Gebhard

    2002-01-01

    Karl Popper wäre im Juli 2002 hundert Jahre alt geworden. Prof. Dr. Gebhard Kirchgässner würdigt den politischen Philosophen, der als bedeutendster Wissenschaftstheoretiker des 20. Jahrhunderts gilt.

  2. Millisele õpetajale kingiksite imerohu? / Karl Martin Sinijärv, Vahur Keller, Kaarel Tarand ... [jt.

    Index Scriptorium Estoniae

    2010-01-01

    Küsimusele vastavad: Eesti kirjanike liidu esimees Karl Martin Sinijärv, nuku- ja noorsooteatri lavastaja Vahur Keller, Sirbi peatoimetaja Kaarel Tarand, kirjanik Andrus Kivirähk, ajakirjanik Juhani Püttsepp

  3. Graphical evaluation of complexometric titration curves.

    Science.gov (United States)

    Guinon, J L

    1985-04-01

    A graphical method, based on logarithmic concentration diagrams, for construction, without any calculations, of complexometric titration curves is examined. The titration curves obtained for different kinds of unidentate, bidentate and quadridentate ligands clearly show why only chelating ligands are usually used in titrimetric analysis. The method has also been applied to two practical cases where unidentate ligands are used: (a) the complexometric determination of mercury(II) with halides and (b) the determination of cyanide with silver, which involves both a complexation and a precipitation system; for this purpose construction of the diagrams for the HgCl(2)/HgCl(+)/Hg(2+) and Ag(CN)(2)(-)/AgCN/CN(-) systems is considered in detail.

  4. Kinetic Titration Series with Biolayer Interferometry

    Science.gov (United States)

    Frenzel, Daniel; Willbold, Dieter

    2014-01-01

    Biolayer interferometry is a method to analyze protein interactions in real-time. In this study, we illustrate the usefulness to quantitatively analyze high affinity protein ligand interactions employing a kinetic titration series for characterizing the interactions between two pairs of interaction patterns, in particular immunoglobulin G and protein G B1 as well as scFv IC16 and amyloid beta (1–42). Kinetic titration series are commonly used in surface plasmon resonance and involve sequential injections of analyte over a desired concentration range on a single ligand coated sensor chip without waiting for complete dissociation between the injections. We show that applying this method to biolayer interferometry is straightforward and i) circumvents problems in data evaluation caused by unavoidable sensor differences, ii) saves resources and iii) increases throughput if screening a multitude of different analyte/ligand combinations. PMID:25229647

  5. Coulometrische titration von hypochloriten und chloraten.

    Science.gov (United States)

    Gründler, P; Holzapfel, H

    1970-03-01

    Hypochlorite was determined by direct coulometric titration with iron(II) in an acetate buffered solution. Chlorate was titrated with titanium(III) in 2M hydrochloric acid. Amperometric indication with one and two electrodes, respectively, was used. Mixtures of hypochlorites and chlorates, e.g., in industrial electrolytes, may be analysed. On a déterminé l'hypochlorite par titrage coulométrique direct avec le fer(II) dans une solution tamponnée à l'acétate. On a titré le chlorate avec le titane(III) en acide chlorhydrique 2M. On a utilisé l'indication ampérométrique une et deux électrodes respectivement. On peut analyser des mélanges d'hypochlorites et de chlorates, par exemple dans des électrolytes industriels.

  6. Optimal level of continuous positive airway pressure: auto-adjusting titration versus titration with a predictive equation.

    Science.gov (United States)

    Choi, Ji Ho; Jun, Young Joon; Oh, Jeong In; Jung, Jong Yoon; Hwang, Gyu Ho; Kwon, Soon Young; Lee, Heung Man; Kim, Tae Hoon; Lee, Sang Hag; Lee, Seung Hoon

    2013-05-01

    The aims of the present study were twofold. We sought to compare two methods of titrating the level of continuous positive airway pressure (CPAP) - auto-adjusting titration and titration using a predictive equation - with full-night manual titration used as the benchmark. We also investigated the reliability of the two methods in patients with obstructive sleep apnea syndrome (OSAS). Twenty consecutive adult patients with OSAS who had successful, full-night manual and auto-adjusting CPAP titration participated in this study. The titration pressure level was calculated with a previously developed predictive equation based on body mass index and apnea-hypopnea index. The mean titration pressure levels obtained with the manual, auto-adjusting, and predictive equation methods were 9.0 +/- 3.6, 9.4 +/- 3.0, and 8.1 +/- 1.6 cm H2O,respectively. There was a significant difference in the concordance within the range of +/- 2 cm H2O (p = 0.019) between both the auto-adjusting titration and the titration using the predictive equation compared to the full-night manual titration. However, there was no significant difference in the concordance within the range of +/- 1 cm H2O (p > 0.999). When compared to full-night manual titration as the standard method, auto-adjusting titration appears to be more reliable than using a predictive equation for determining the optimal CPAP level in patients with OSAS.

  7. Determining a Solubility Product Constant by Potentiometric Titration to Increase Students' Conceptual Understanding of Potentiometry and Titrations

    Science.gov (United States)

    Grabowski, Lauren E.; Goode, Scott R.

    2017-01-01

    Potentiometric titrations are widely taught in first-year undergraduate courses to connect electrochemistry, stoichiometry, and equilibria and to reinforce acid-base titrations. Students perform a potentiometric titration that is then analyzed to determine analyte concentrations and the solubility product constant of the solid species.

  8. Spectrophotometric titration of zirconium in siliceous materials

    International Nuclear Information System (INIS)

    Sugawara, K.F.; Su, Y.-S.; Strzegowski, W.R.

    1978-01-01

    An accurate and selective complexometric titration procedure based upon a spectrophotometrically detected end-point has been developed for the determination of zirconium in glasses, glass-ceramics and refractories. A p-bromomandelic acid separation step for zirconium imparts excellent selectivity to the procedure. The method is particularly important for the 1 to 5% concentration range where a simple, accurate and selective method for the determination of zirconium has been lacking. (author)

  9. Digital movie-based on automatic titrations.

    Science.gov (United States)

    Lima, Ricardo Alexandre C; Almeida, Luciano F; Lyra, Wellington S; Siqueira, Lucas A; Gaião, Edvaldo N; Paiva Junior, Sérgio S L; Lima, Rafaela L F C

    2016-01-15

    This study proposes the use of digital movies (DMs) in a flow-batch analyzer (FBA) to perform automatic, fast and accurate titrations. The term used for this process is "Digital movie-based on automatic titrations" (DMB-AT). A webcam records the DM during the addition of the titrant to the mixing chamber (MC). While the DM is recorded, it is decompiled into frames ordered sequentially at a constant rate of 26 frames per second (FPS). The first frame is used as a reference to define the region of interest (ROI) of 28×13pixels and the R, G and B values, which are used to calculate the Hue (H) values for each frame. The Pearson's correlation coefficient (r) is calculated between the H values of the initial frame and each subsequent frame. The titration curves are plotted in real time using the r values and the opening time of the titrant valve. The end point is estimated by the second derivative method. A software written in C language manages all analytical steps and data treatment in real time. The feasibility of the method was attested by application in acid/base test samples and edible oils. Results were compared with classical titration and did not present statistically significant differences when the paired t-test at the 95% confidence level was applied. The proposed method is able to process about 117-128 samples per hour for the test and edible oil samples, respectively, and its precision was confirmed by overall relative standard deviation (RSD) values, always less than 1.0%. Copyright © 2015 Elsevier B.V. All rights reserved.

  10. Thermometric titration of acids in pyridine.

    Science.gov (United States)

    Vidal, R; Mukherjee, L M

    1974-04-01

    Thermometric titration of HClO(4), HI, HNO(3), HBr, picric acid o-nitrobenzoic acid, 2,4- and 2,5-dinitrophenol, acetic acid and benzoic acid have been attempted in pyridine as solvent, using 1,3-diphenylguanidine as the base. Except in the case of 2,5-dinitrophenol, acetic acid and benzoic acid, the results are, in general, reasonably satisfactory. The approximate molar heats of neutralization have been calculated.

  11. Determination of milligram amounts of neptunium by potentiometric titration

    International Nuclear Information System (INIS)

    Ryzhinskij, M.V.; Solntseva, L.F.

    1981-01-01

    Two procedures of potentiometric titration of about 1 mg Np are reported which are based on its oxidation to neptunium (6) with silver (2) oxide followed by titration with iron (2) to neptunium (5) in one case and to neptunium (4) in the alternative one. The error is not greater than 0.2% rel. Ten-fold uranium excess does not interfere. Up to 1% of plutonium relative to neptunium does not interfere in the case of the titration to neptunium (5). In the titration to neptunium (4), plutonium is titrated stoichiometrically [ru

  12. Potentiometric titrations in anhydrous acetic acid

    International Nuclear Information System (INIS)

    Le Port, L.

    1966-03-01

    The method used for studying anhydrous acetic acid is potentiometry with a glass electrode. We have in this way studied the titration of common inorganic acids (HClO 4 - HBr - H 2 SO 4 - HCl - HNO 3 - H 3 PO 4 ) and of some metallic salts. Furthermore we have shown that complex acids are formed between HCl and some metallic chlorides. An analysis of the titration curves for the inorganic acids against pyridinium chloride has made it possible to calculate a certain number of values for the dissociation pK of these acids and of the corresponding pyridinium salts. The titration of metallic perchlorates constitutes a method of studying the stability of acetates; we have thus been able to draw up a classification for some of these acetates. The metallic chlorides studied fall into two groups according to their behaviour in weak or strong acids. The differences have been explained on the basis of the role played by solvolysis. In the third part we have studied the acidic properties of mixtures of HCl with certain metallic chlorides. This work has demonstrated the existence, in certain cases, of acid complexes of the type (HCl) m MCl n . (author) [fr

  13. A new sensor for thermometric titrations.

    Science.gov (United States)

    Najib, Fadhil M; Zewar, Sardir; Abdulla, Ahmad M

    2007-01-15

    A new thermometric sensor, which is a transistor (OC71), has been introduced to follow thermometric titrations successfully to clear end points. The sensor was suitable in both normal and differential modes of titration. It is possible to titrate down to 1.32micromol of HCl and 26.4micromol of H(3)BO(3)in a final 20ml solution with accuracy and precision of 1%, 2.2% and 1.4%, 2.2%, respectively. The sensor, in association with a pH glass electrode, was used for the determination of pK values of some well established weak acids such as, acetic acid (4.77), phosphoric acid (pK(1)=2.18, pK(2)=7.20 and pK(3)=12.32) as well as for a very weak acid of uncertain pK values H(3)BO(3) (pK(1)=9.20, pK(2)=12.7 and pK(3)=13.80). The sensor was also examined for kinetic catalytic determination of iron(III) in water, milk and pharmaceuticals.

  14. Rocket Fuel Synthesis by Fisher-Tropsch Process

    Data.gov (United States)

    National Aeronautics and Space Administration — This study aims to investigate the feasibility of using Fisher Tropsch (FT), a commercial-scale technology that currently produces liquid fuels from syngas (CO &...

  15. Evaluation of fish handling techniques employed by artisanal fishers ...

    African Journals Online (AJOL)

    Evaluation of fish handling techniques employed by artisanal fishers on quality of Lethrinids and Siganids fish genera at landing time along the Kenyan coast using sensory and microbiological methods.

  16. Using Fisher information to track stability in multivariate systems

    Science.gov (United States)

    With the current proliferation of data, the proficient use of statistical and mining techniques offer substantial benefits to capture useful information from any dataset. As numerous approaches make use of information theory concepts, here, we discuss how Fisher information (FI...

  17. Phase space view of quantum mechanical systems and Fisher information

    International Nuclear Information System (INIS)

    Nagy, Á.

    2016-01-01

    Highlights: • Phase-space Fisher information coming from the canonical distribution is derived for the ground state of quantum mechanical systems. • Quantum mechanical phase-space Fisher information contains an extra term due to the position dependence of the temperature. • A complete analogy to the classical case is demonstrated for the linear harmonic oscillator. - Abstract: Pennini and Plastino showed that the form of the Fisher information generated by the canonical distribution function reflects the intrinsic structure of classical mechanics. Now, a quantum mechanical generalization of the Pennini–Plastino theory is presented based on the thermodynamical transcription of the density functional theory. Comparing to the classical case, the phase-space Fisher information contains an extra term due to the position dependence of the temperature. However, for the special case of constant temperature, the expression derived bears resemblance to the classical one. A complete analogy to the classical case is demonstrated for the linear harmonic oscillator.

  18. A novel approach for solving fractional Fisher equation using ...

    Indian Academy of Sciences (India)

    Department of Engineering Sciences, Faculty of Technology and Engineering, East of ... The reliability, simplicity and cost-effectiveness of the method are confirmed by applying this ... Differential transform method; fractional Fisher equation.

  19. A novel approach for solving fractional Fisher equation using

    Indian Academy of Sciences (India)

    Differential transform method; fractional Fisher equation. ... confirmed by applying this method on different forms of functional equations. Author Affiliations. MIRZAZADEH M1. Department of Engineering Sciences, Faculty of Technology and ...

  20. Phase space view of quantum mechanical systems and Fisher information

    Energy Technology Data Exchange (ETDEWEB)

    Nagy, Á., E-mail: anagy@madget.atomki.hu

    2016-06-17

    Highlights: • Phase-space Fisher information coming from the canonical distribution is derived for the ground state of quantum mechanical systems. • Quantum mechanical phase-space Fisher information contains an extra term due to the position dependence of the temperature. • A complete analogy to the classical case is demonstrated for the linear harmonic oscillator. - Abstract: Pennini and Plastino showed that the form of the Fisher information generated by the canonical distribution function reflects the intrinsic structure of classical mechanics. Now, a quantum mechanical generalization of the Pennini–Plastino theory is presented based on the thermodynamical transcription of the density functional theory. Comparing to the classical case, the phase-space Fisher information contains an extra term due to the position dependence of the temperature. However, for the special case of constant temperature, the expression derived bears resemblance to the classical one. A complete analogy to the classical case is demonstrated for the linear harmonic oscillator.

  1. Sustainability of Artisanal Fishers Livelihoods in the Jebba Lake ...

    African Journals Online (AJOL)

    User

    abandonment with respect to school, hospital, road network and electricity. Socially, most .... These loans were remitted by fishers with fish caught and the bargaining power lies .... Activities of Rural Women in Ondo State Nigeria. Nigerian ...

  2. Determinants of Fisher's Choice of Fishing Activity along the Volta ...

    African Journals Online (AJOL)

    Determinants of Fisher's Choice of Fishing Activity along the Volta Lake in Yeji ... The analysis was done using the Ordered Probit Model and descriptive statistics. ... economic growth, reduce poverty and ensure household food security in Yeji.

  3. Traveling wave behavior for a generalized fisher equation

    International Nuclear Information System (INIS)

    Feng Zhaosheng

    2008-01-01

    There is the widespread existence of wave phenomena in physics, chemistry and biology. This clearly necessitates a study of traveling waves in depth and of the modeling and analysis involved. In the present paper, we study a nonlinear reaction-diffusion equation, which can be regarded as a generalized Fisher equation. Applying the Cole-Hopf transformation and the first integral method, we obtain a class of traveling solitary wave solutions for this generalized Fisher equation

  4. Karl Friedrich Zollner and the historical dimension of astronomical photometry

    Science.gov (United States)

    Sterken, C.; Staubermann, K. B.

    This book results from presentations and discussions of a group of astronomers and historians during a one-day workshop held at Archenhold Observatory, Berlin-Treptow, on April 4, 1997. This meeting was the first forum in a series dedicated to historical aspects of observational astrophysics in the nineteenth and early twentieth century. The basic principle of these meetings is to reflect during one or more days on the work and personality of a single individual or of a group of persons, at the same time avoiding the really dominant figures that typify the age. By focusing on key people who epitomize a way of thinking and working that has formed many of the ideas by which we do astrophysical research today, we also attempt to evoke the scientific spirit of the era under consideration. In 1858, the German physicist Karl Friedrich Zoellner introduced a new type of astronomical photometer which became a bestseller in the second half of the nineteenth century and which led him to the first German professorship in astrophysics. His type of photometer allowed most accurate photometric measurements and was used at several observatories for almost half a century. This book outlines four major themes. The first part describes the observing instruments that were used by Zoellner and his contemporaries: photometers and spectrographs that complemented his original design, but also competed with his most versatile prototype photometer. The description also includes an account of technical aspects associated with the replication of such a photometer today. The second part analyses the astrophysical data that were obtained with Zoellner's tools, and extracts information hidden in the published data --- scientific information as well as diverse aspects related to the observer himself. These nineteenth-century data are now published for the first time on a modern magnitude scale and are directly accessible in tabular form, and are thus fully applicable to archeophotometric studies

  5. Is automatic CPAP titration as effective as manual CPAP titration in OSAHS patients? A meta-analysis.

    Science.gov (United States)

    Gao, Weijie; Jin, Yinghui; Wang, Yan; Sun, Mei; Chen, Baoyuan; Zhou, Ning; Deng, Yuan

    2012-06-01

    It is costly and time-consuming to conduct the standard manual titration to identify an effective pressure before continuous positive airway pressure (CPAP) treatment for obstructive sleep apnea (OSA) patients. Automatic titration is cheaper and more easily available than manual titration. The purpose of this systematic review was to evaluate the effect of automatic titration in identifying a pressure and on the improvement of apnea/hyponea index (AHI) and somnolence, the change of sleep quality, and the acceptance and compliance of CPAP treatment, compared with the manual titration. A systematic search was made of the PubMed, EMBASE, Cochrane Library, SCI, China Academic Journals Full-text Databases, Chinese Biomedical Literature Database, Chinese Scientific Journals Databases and Chinese Medical Association Journals. Randomized controlled trials comparing automatic titration and manual titration were reviewed. Studies were pooled to yield odds ratios (OR) or mean differences (MD) with 95% confidence intervals (CI). Ten trials involving 849 patients met the inclusion criteria. It is hard to identify a trend in the pressures determined by either automatic or manual titration. Automatic titration can improve the AHI (MD = 0.03/h, 95% CI = -4.48 to 4.53) and Epworth sleepiness scale (SMD = -0.02, 95% CI = -0.34 to 0.31,) as effectively as the manual titration. There is no difference between sleep architecture under automatic titration or manual titration. The acceptance of CPAP treatment (OR = 0.96, 95% CI = 0.60 to 1.55) and the compliance with treatment (MD = -0.04, 95% CI = -0.17 to 0.10) after automatic titration is not different from manual titration. Automatic titration is as effective as standard manual titration in improving AHI, somnolence while maintaining sleep quality similar to the standard method. In addition, automatic titration has the same effect on the acceptance and compliance of CPAP treatment as manual titration. With the potential advantage

  6. Payment for Environmental Services, fishers and cetaceans’ conservation

    Directory of Open Access Journals (Sweden)

    Shirley Pacheco de Souza

    2013-12-01

    Full Text Available The interactions between fisheries and cetaceans have been widely discussed by several authors. Bycatch of small cetaceans is frequent around the world, threatening several species. In Brazil, in two critical areas– Soure(Marajó Island and São Sebastião - more than 70% of the local fishers (n= 40 and n=70, respectively interviewed in a previous study reported bycatch of Guiana dolphin (Sotalia guianensis or Franciscana dolphin (Pontoporia blainvillei in gillnets. Other negative interaction involving fisheries and cetaceans is the entanglement of Southern right whales in fishing nets during their migration along the coast, as reported by 68% of the fishers interviewed in the South of Brazil (Pântano do Sul: n=25. On the other hand these interactions result in damage of the fishing gear and great economic losses to the fishers. To minimize these conflicts we suggest the adoption of strategies involving interested fishers in bycatch monitoring programs, where fishers could collect local data on the critical areas and frequency of dolphins’ accidental catches, consequently increasing their awareness of the problem and providing a better baseline to support educational and regulatory measures related to cetaceans’ bycatch. As a compensation for the time and energy spent in these programs, fishers could receive a “payment for environmental services” (PES, as an economic incentive to their participation, which would contribute to their economic stability as well as to cetaceans’ conservation.

  7. ASSESSMENT OF ATTENTION THRESHOLD IN RATS BY TITRATION OF VISUAL CUE DURATION DURING THE FIVE CHOICE SERIAL REACTION TIME TASK

    Science.gov (United States)

    Martin, Thomas J.; Grigg, Amanda; Kim, Susy A.; Ririe, Douglas G.; Eisenach, James C.

    2014-01-01

    Background The 5 choice serial reaction time task (5CSRTT) is commonly used to assess attention in rodents. We sought to develop a variant of the 5CSRTT that would speed training to objective success criteria, and to test whether this variant could determine attention capability in each subject. New Method Fisher 344 rats were trained to perform a variant of the 5CSRTT in which the duration of visual cue presentation (cue duration) was titrated between trials based upon performance. The cue duration was decreased when the subject made a correct response, or increased with incorrect responses or omissions. Additionally, test day challenges were provided consisting of lengthening the intertrial interval and inclusion of a visual distracting stimulus. Results Rats readily titrated the cue duration to less than 1 sec in 25 training sessions or less (mean ± SEM, 22.9 ± 0.7), and the median cue duration (MCD) was calculated as a measure of attention threshold. Increasing the intertrial interval increased premature responses, decreased the number of trials completed, and increased the MCD. Decreasing the intertrial interval and time allotted for consuming the food reward demonstrated that a minimum of 3.5 sec is required for rats to consume two food pellets and successfully attend to the next trial. Visual distraction in the form of a 3 Hz flashing light increased the MCD and both premature and time out responses. Comparison with existing method The titration variant of the 5CSRTT is a useful method that dynamically measures attention threshold across a wide range of subject performance, and significantly decreases the time required for training. Task challenges produce similar effects in the titration method as reported for the classical procedure. Conclusions The titration 5CSRTT method is an efficient training procedure for assessing attention and can be utilized to assess the limit in performance ability across subjects and various schedule manipulations. PMID

  8. Karl Marx and the Study of Media and Culture Today

    Directory of Open Access Journals (Sweden)

    Christian Fuchs

    2014-02-01

    Full Text Available The task of this paper discusses the role of Marx in analysing media, communica-tion and culture today. An analysis of three contemporary Cultural Studies works – Lawrence Grossberg’s monograph Cultural Studies in the Future Tense, John Hartley’s monograph Digital Futures for Cultural and Media Studies and Paul Smith’s edited volume The Renewal of Cultural Studies – shows that there is an agreement that the economy needs to be taken more into account by Cultural Studies, but disagreement on which approach should be taken and what the role of Karl Marx’s works shall be. The paper argues that Marx’s labour theory of value is especially important for critically analysing the media, culture and communica-tion. Labour is still a blind spot of the study of culture and the media, although this situation is slowly improving. It is maintained that the turn away from Marx in Cultural and Media Studies was a profound mistake that should be reverted. Only an engagement with Marx can make Cultural and Media Studies topical, politically relevant, practical and critical, in the current times of global crisis and resurgent critique.

  9. Testing the null hypothesis: the forgotten legacy of Karl Popper?

    Science.gov (United States)

    Wilkinson, Mick

    2013-01-01

    Testing of the null hypothesis is a fundamental aspect of the scientific method and has its basis in the falsification theory of Karl Popper. Null hypothesis testing makes use of deductive reasoning to ensure that the truth of conclusions is irrefutable. In contrast, attempting to demonstrate the new facts on the basis of testing the experimental or research hypothesis makes use of inductive reasoning and is prone to the problem of the Uniformity of Nature assumption described by David Hume in the eighteenth century. Despite this issue and the well documented solution provided by Popper's falsification theory, the majority of publications are still written such that they suggest the research hypothesis is being tested. This is contrary to accepted scientific convention and possibly highlights a poor understanding of the application of conventional significance-based data analysis approaches. Our work should remain driven by conjecture and attempted falsification such that it is always the null hypothesis that is tested. The write up of our studies should make it clear that we are indeed testing the null hypothesis and conforming to the established and accepted philosophical conventions of the scientific method.

  10. Karl Pearson and eugenics: personal opinions and scientific rigor.

    Science.gov (United States)

    Delzell, Darcie A P; Poliak, Cathy D

    2013-09-01

    The influence of personal opinions and biases on scientific conclusions is a threat to the advancement of knowledge. Expertise and experience does not render one immune to this temptation. In this work, one of the founding fathers of statistics, Karl Pearson, is used as an illustration of how even the most talented among us can produce misleading results when inferences are made without caution or reference to potential bias and other analysis limitations. A study performed by Pearson on British Jewish schoolchildren is examined in light of ethical and professional statistical practice. The methodology used and inferences made by Pearson and his coauthor are sometimes questionable and offer insight into how Pearson's support of eugenics and his own British nationalism could have potentially influenced his often careless and far-fetched inferences. A short background into Pearson's work and beliefs is provided, along with an in-depth examination of the authors' overall experimental design and statistical practices. In addition, portions of the study regarding intelligence and tuberculosis are discussed in more detail, along with historical reactions to their work.

  11. Karl Popper's Conception of Metaphysics and its Problems

    Directory of Open Access Journals (Sweden)

    Cláudia Ribeiro

    2014-08-01

    Full Text Available http://dx.doi.org/10.5007/1808-1711.2014v18n2p209 In this paper I intend to thoroughly analyse Karl Popper’s relation to metaphysics. I start with his first writings, where he states the differences between science, pseudoscience and metaphysics. I then describe how his thoughts on the subject evolved to culminate in his reflection on metaphysical research programmes and the need for a revival of natural philosophy. A major concern is Popper’s famous testability criterion to set apart science from non-science. I point at the problems of the conception of metaphysics as non-testable theories (which are similar to the problems of the conception of metaphysics as theories involving unobservables and, in order to avoid these problems, I propose to retain nothing but the traditional conception of metaphysics as the general theories about the nature of the world. This leads me to the conclusion that science is not only an empirical task but also, and in a very important sense, a speculative one.

  12. Falsifications and corroborations: Karl Popper's influence on systematics.

    Science.gov (United States)

    Helfenbein, Kevin G; DeSalle, Rob

    2005-04-01

    Over the last three decades, the philosophy of Karl Raimund Popper has had a strong influence on the field of systematic biology. Unequivocally, no other philosopher's work has had such an influence during this formative period in systematics. Much, but not all, of the early discourse on Popper and systematics dealt with the philosophical basis of systematics as a science. More recently Popper's work has been discussed in the systematics literature in relation to specific methodologies such as parsimony and maximum likelihood. In this paper, we provide the reader with a concise summary of Popper's ideas relevant to systematics, review the systematic literature invoking or declining Popper's importance to the field, and make a recommendation for the future course of philosophical thinking in systematics. We try to make clear various authors' interpretations of Popper's work and how those interpretations have impacted systematic thought. Although the reader may come away from this review with a clearer idea of Popper's relevance or lack thereof, our primary hope is that the reader will be compelled to question him- or herself about the philosophical basis of the systematic work that he or she does, and to delve into the literature herein cited. We begin by presenting a synopsis of Popper's philosophical views to allow those views to be placed in the context of systematics.

  13. Determination of neptunium by redox titration

    International Nuclear Information System (INIS)

    Godbole, A.G.; Patil, S.K.

    1979-01-01

    A simple and quick method for the potentiometric determination of neptunium on the 2 to 5 mg scale has been developed. It consists of oxidation to Np(VI) by AgO or fuming with HClO 4 , destruction of excess of AgO by sulphamic acid, reduction of Np(VI) to Np(IV) with a slight excess of standard Fe(II) in 2M H 2 SO 4 and potentiometric titration of the excess of Fe(II) with standard Ce(IV). The precision is +- 0.5%. (author)

  14. On the validity of cosmological Fisher matrix forecasts

    International Nuclear Information System (INIS)

    Wolz, Laura; Kilbinger, Martin; Weller, Jochen; Giannantonio, Tommaso

    2012-01-01

    We present a comparison of Fisher matrix forecasts for cosmological probes with Monte Carlo Markov Chain (MCMC) posterior likelihood estimation methods. We analyse the performance of future Dark Energy Task Force (DETF) stage-III and stage-IV dark-energy surveys using supernovae, baryon acoustic oscillations and weak lensing as probes. We concentrate in particular on the dark-energy equation of state parameters w 0 and w a . For purely geometrical probes, and especially when marginalising over w a , we find considerable disagreement between the two methods, since in this case the Fisher matrix can not reproduce the highly non-elliptical shape of the likelihood function. More quantitatively, the Fisher method underestimates the marginalized errors for purely geometrical probes between 30%-70%. For cases including structure formation such as weak lensing, we find that the posterior probability contours from the Fisher matrix estimation are in good agreement with the MCMC contours and the forecasted errors only changing on the 5% level. We then explore non-linear transformations resulting in physically-motivated parameters and investigate whether these parameterisations exhibit a Gaussian behaviour. We conclude that for the purely geometrical probes and, more generally, in cases where it is not known whether the likelihood is close to Gaussian, the Fisher matrix is not the appropriate tool to produce reliable forecasts

  15. Levels and drivers of fishers' compliance with marine protected areas

    Directory of Open Access Journals (Sweden)

    Adrian Arias

    2015-12-01

    Full Text Available Effective conservation depends largely on people's compliance with regulations. We investigate compliance through the lens of fishers' compliance with marine protected areas (MPAs. MPAs are widely used tools for marine conservation and fisheries management. Studies show that compliance alone is a strong predictor of fish biomass within MPAs. Hence, fishers' compliance is critical for MPA effectiveness. However, there are few empirical studies showing what factors influence fishers' compliance with MPAs. Without such information, conservation planners and managers have limited opportunities to provide effective interventions. By studying 12 MPAs in a developing country (Costa Rica, we demonstrate the role that different variables have on fishers' compliance with MPAs. Particularly, we found that compliance levels perceived by resource users were higher in MPAs (1 with multiple livelihoods, (2 where government efforts against illegal fishing were effective, (3 where fishing was allowed but regulated, (4 where people were more involved in decisions, and (5 that were smaller. We also provide a novel and practical measure of compliance: a compound variable formed by the number illegal fishers and their illegal fishing effort. Our study underlines the centrality of people's behavior in nature conservation and the importance of grounding decision making on the social and institutional realities of each location.

  16. 76 FR 78739 - Agency Information Collection (Regulation on Application for Fisher Houses and Other Temporary...

    Science.gov (United States)

    2011-12-19

    ... DEPARTMENT OF VETERANS AFFAIRS [OMB Control No. 2900-0630] Agency Information Collection (Regulation on Application for Fisher Houses and Other Temporary Lodging and VHA Fisher House Application... INFORMATION: Title: Regulation on Application for Fisher Houses and Other Temporary Lodging and VHA Fisher...

  17. 76 FR 63355 - Proposed Information Collection (Regulation on Application for Fisher Houses and Other Temporary...

    Science.gov (United States)

    2011-10-12

    ... (Regulation on Application for Fisher Houses and Other Temporary Lodging and VHA Fisher House Application... information technology. Title: Regulation on Application for Fisher Houses and Other Temporary Lodging and VHA Fisher House Application, VA Forms 10-0408 and 10-0408a. OMB Control Number: 2900-0630. Type of Review...

  18. Improving medication titration in heart failure by embedding a structured medication titration plan.

    Science.gov (United States)

    Hickey, Annabel; Suna, Jessica; Marquart, Louise; Denaro, Charles; Javorsky, George; Munns, Andrew; Mudge, Alison; Atherton, John J

    2016-12-01

    To improve up-titration of medications to target dose in heart failure patients by improving communication from hospital to primary care. This quality improvement project was undertaken within three heart failure disease management (HFDM) services in Queensland, Australia. A structured medication plan was collaboratively designed and implemented in an iterative manner, using methods including awareness raising and education, audit and feedback, integration into existing work practice, and incentive payments. Evaluation was undertaken using sequential audits, and included process measures (use of the titration plan, assignment of responsibility) and outcome measures (proportion of patients achieving target dose) in HFDM service patients with reduced left ventricular ejection fraction. Comparison of the three patient cohorts (pre-intervention cohort A n=96, intervention cohort B n=95, intervention cohort C n=89) showed increase use of the titration plan, a shift to greater primary care responsibility for titration, and an increase in the proportion of patients achieving target doses of angiotensin converting enzyme inhibitors/angiotensin receptor blockers (ACEI/ARB) (A 37% vs B 48% vs C 55%, p=0.051) and beta-blockers (A 38% vs B 33% vs C 51%, p=0.045). Combining all three cohorts, patients not on target doses when discharged from hospital were more likely to achieve target doses of ACEI/ARB (pplan. A medication titration plan was successfully implemented in three HFDM services and improved transitional communication and achievement of target doses of evidence-based therapies within six months of hospital discharge. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  19. Up-titration of allopurinol in patients with gout.

    Science.gov (United States)

    Jennings, Claudine G; Mackenzie, Isla S; Flynn, Rob; Ford, Ian; Nuki, George; De Caterina, Raffaele; Riches, Philip L; Ralston, Stuart H; MacDonald, Thomas M

    2014-08-01

    European League against Rheumatism (EULAR) gout management guidelines recommend achieving a target urate level titration in achieving the EULAR target levels. The Febuxostat versus Allopurinol Streamlined Trial (FAST) is an ongoing multi-centre study comparing the cardiovascular safety of febuxostat and allopurinol (target recruitment: 5706 patients). Recruited patients were already taking allopurinol and the protocol required up-titration of daily allopurinol dose, in 100 mg increments, to achieve the EULAR urate target level prior to randomisation. We reviewed pre-randomisation data from the first 400 recruited and subsequently randomised FAST patients. Of 400 patients, 144 (36%) had urate levels ≥357 µmol/L at screening and required allopurinol up-titration. Higher urate levels were significantly associated with lower allopurinol dose, male sex, increased BMI, increased alcohol intake and diuretic use. Mean fall in urate levels after a single 100-mg dose increase was 71 µmol/L. The number of up-titrations required ranged from one to five (median = 1) with 65% of patients controlled after one 100-mg up-titration. Overall, 97% of up-titrated patients achieved target urate levels with median final allopurinol dose of 300 mg daily. Side effects and complications of up-titration were minimal. Overall, 36% of FAST patients were not at target urate levels and required up-titration. Allopurinol up-titration was effective in achieving urate target levels and was generally well tolerated by patients. Copyright © 2014 Elsevier Inc. All rights reserved.

  20. Automated titration method for use on blended asphalts

    Science.gov (United States)

    Pauli, Adam T [Cheyenne, WY; Robertson, Raymond E [Laramie, WY; Branthaver, Jan F [Chatham, IL; Schabron, John F [Laramie, WY

    2012-08-07

    A system for determining parameters and compatibility of a substance such as an asphalt or other petroleum substance uses titration to highly accurately determine one or more flocculation occurrences and is especially applicable to the determination or use of Heithaus parameters and optimal mixing of various asphalt stocks. In a preferred embodiment, automated titration in an oxygen gas exclusive system and further using spectrophotometric analysis (2-8) of solution turbidity is presented. A reversible titration technique enabling in-situ titration measurement of various solution concentrations is also presented.

  1. Laboratory Automatic Titration of Chromium Plating and Electropolishing Solutions

    National Research Council Canada - National Science Library

    Sopok, Samuel

    2001-01-01

    .... The analytical chemistry literature lacks an adequate automatic titration method for the monitoring of chromic acid in chromium plating solutions and the monitoring of phosphoric and sulfuric acids...

  2. Titration in the treatment of the more troubled patient.

    Science.gov (United States)

    Winer, J A; Ornstein, E D

    2001-01-01

    This article defines and discusses a modification of technique recommended by the authors in the psychoanalytic treatment of more troubled patients--a modification they call titration. Titration is defined as a conscious decision by the analyst to increase or decrease assistance (or gratification) gradually, in order to facilitate the analytic process. The authors emphasize the complexity of decisions in treatment by focusing on the decision-making processes that titration requires. Guidelines and a case vignette are presented. The authors conclude by considering some of the politics involved in the introduction of technique modifications, the salience of the titration concept, and directions for further exploration.

  3. A computer controlled potentiometric titrator for quantitative determination of uranium

    International Nuclear Information System (INIS)

    Verdingh, V.; Michiels, A.

    1988-01-01

    The modified Davies and Gray methods is frequently used for the potentiometric titration of uranium. It is based upon the reduction of U(VI) to U(IV) with a reductant (e.g. Fe ++ ) followed by a selective oxidation of the excess of reductant and subsequent titration of U(IV) with potassium dichromate (K 2 Cr 2 O 7 ). Interference from other elements is low, but the method is rather cumbersome due to the number of reactants to be added before the titration is started. The timing of these additions also plays a role. In order to render the titration less dependent on human factors and with the aim of reaching high reproducibility, a computer controlled system has been designed and set-up. Reagents are added by five computer controlled burettes. A program allows the choice of volumes and waiting times, and commands the start of the final titration which is followed by the microprocessor of the automatic potentiometric titrator. In this way a routine uranium titration can be completed in about twelve minutes. Reproducibilities of the order of ±15% are achievable in routine operation. For high precision work, the titrator is used as an end-point detector. Titrant is added manually by mass, so as to react with > 99% of the uranium. The residual uranium is then titrated automatically by colume with diluted titrant. The precision can be improved by a factor of approximately ten. (orig.)

  4. R. A. Fisher: a faith fit for eugenics.

    Science.gov (United States)

    Moore, James

    2007-03-01

    In discussions of 'religion-and-science', faith is usually emphasized more than works, scientists' beliefs more than their deeds. By reversing the priority, a lingering puzzle in the life of Ronald Aylmer Fisher (1890-1962), statistician, eugenicist and founder of the neo-Darwinian synthesis, can be solved. Scholars have struggled to find coherence in Fisher's simultaneous commitment to Darwinism, Anglican Christianity and eugenics. The problem is addressed by asking what practical mode of faith or faithful mode of practice lent unity to his life? Families, it is argued, with their myriad practical, emotional and intellectual challenges, rendered a mathematically-based eugenic Darwinian Christianity not just possible for Fisher, but vital.

  5. Fisher information and quantum potential well model for finance

    Energy Technology Data Exchange (ETDEWEB)

    Nastasiuk, V.A., E-mail: nasa@i.ua

    2015-09-25

    The probability distribution function (PDF) for prices on financial markets is derived by extremization of Fisher information. It is shown how on that basis the quantum-like description for financial markets arises and different financial market models are mapped by quantum mechanical ones. - Highlights: • The financial Schrödinger equation is derived using the principle of minimum Fisher information. • Statistical models for price variation are mapped by the quantum models of coupled particle. • The model of quantum particle in parabolic potential well corresponds to Efficient market.

  6. Fisher information and quantum potential well model for finance

    International Nuclear Information System (INIS)

    Nastasiuk, V.A.

    2015-01-01

    The probability distribution function (PDF) for prices on financial markets is derived by extremization of Fisher information. It is shown how on that basis the quantum-like description for financial markets arises and different financial market models are mapped by quantum mechanical ones. - Highlights: • The financial Schrödinger equation is derived using the principle of minimum Fisher information. • Statistical models for price variation are mapped by the quantum models of coupled particle. • The model of quantum particle in parabolic potential well corresponds to Efficient market

  7. Fisher information in the design of computer simulation experiments

    Energy Technology Data Exchange (ETDEWEB)

    StehlIk, Milan; Mueller, Werner G [Department of Applied Statistics, Johannes-Kepler-University Linz Freistaedter Strasse 315, A-4040 Linz (Austria)], E-mail: Milan.Stehlik@jku.at, E-mail: Werner.Mueller@jku.at

    2008-11-01

    The concept of Fisher information is conveniently used as a basis for designing efficient experiments. However, if the output stems from computer simulations they are often approximated as realizations of correlated random fields. Consequently, the conditions under which Fisher information may be suitable must be restated. In the paper we intend to give some simple but illuminating examples for these cases. 'Random phenomena have increasing importance in Engineering and Physics, therefore theoretical results are strongly needed. But there is a gap between the probability theory used by mathematicians and practitioners. Two very different languages have been generated in this way...' (Paul Kree, Paris 1995)

  8. Fisher information in the design of computer simulation experiments

    International Nuclear Information System (INIS)

    StehlIk, Milan; Mueller, Werner G

    2008-01-01

    The concept of Fisher information is conveniently used as a basis for designing efficient experiments. However, if the output stems from computer simulations they are often approximated as realizations of correlated random fields. Consequently, the conditions under which Fisher information may be suitable must be restated. In the paper we intend to give some simple but illuminating examples for these cases. 'Random phenomena have increasing importance in Engineering and Physics, therefore theoretical results are strongly needed. But there is a gap between the probability theory used by mathematicians and practitioners. Two very different languages have been generated in this way...' (Paul Kree, Paris 1995)

  9. The acid-base titration of montmorillonite

    Science.gov (United States)

    Bourg, I. C.; Sposito, G.; Bourg, A. C.

    2003-12-01

    Proton binding to clay minerals plays an important role in the chemical reactivity of soils (e.g., acidification, retention of nutrients or pollutants). If should also affect the performance of clay barriers for waste disposal. The surface acidity of clay minerals is commonly modelled empirically by assuming generic amphoteric surface sites (>SOH) on a flat surface, with fitted site densities and acidity constant. Current advances in experimental methods (notably spectroscopy) are rapidly improving our understanding of the structure and reactivity of the surface of clay minerals (arrangement of the particles, nature of the reactive surface sites, adsorption mechanisms). These developments are motivated by the difficulty of modelling the surface chemistry of mineral surfaces at the macro-scale (e.g., adsorption or titration) without a detailed (molecular-scale) picture of the mechanisms, and should be progressively incorporated into surface complexation models. In this view, we have combined recent estimates of montmorillonite surface properties (surface site density and structure, edge surface area, surface electrostatic potential) with surface site acidities obtained from the titration of alpha-Al2O3 and SiO2, and a novel method of accounting for the unknown initial net proton surface charge of the solid. The model predictions were compared to experimental titrations of SWy-1 montmorillonite and purified MX-80 bentonite in 0.1-0.5 mol/L NaClO4 and 0.005-0.5 mol/L NaNO3 background electrolytes, respectively. Most of the experimental data were appropriately described by the model after we adjusted a single parameter (silanol sites on the surface of montmorillonite were made to be slightly more acidic than those of silica). At low ionic strength and acidic pH the model underestimated the buffering capacity of the montmorillonite, perhaps due to clay swelling or to the interlayer adsorption of dissolved aluminum. The agreement between our model and the experimental

  10. On the theory of thermometric titration.

    Science.gov (United States)

    Piloyan, G O; Dolinina, Y V

    1974-09-01

    The general equation defining the change in solution temperature DeltaT during a thermometric titration is DeltaT = T - T(0) = - AV 1 + BV where A and B are constants, V is the volume of titrant used to produce temperature T, and T(0) is the initial temperature. There is a linear relation between the inverse values of DeltaT and V: 1 Delta T = - a V - b where a = 1/A and b = B/A, both a and b being constants. A linear relation between DeltaT and V is usually a special case of this general relation, and is valid only over a narrow range of V. Graphs of 1/DeltaTvs. 1/V are more suitable for practical calculations than the usual graphs of DeltaTvs. V.

  11. Rheumatoid arthritis, Proteus, anti-CCP antibodies and Karl Popper.

    Science.gov (United States)

    Ebringer, Alan; Rashid, Taha; Wilson, Clyde

    2010-02-01

    Rheumatoid arthritis (RA) is a crippling joint disease affecting over 20 million people worldwide. The cause of RA is most probably linked to the triad of microbial trigger, genetic association and autoimmunity and can be explained using the philosophical method of Karl Popper or Popperian sequences. Ten "Popper sequences" have been identified which point to the urinary microbe Proteus mirabilis as the cause of RA: Popper sequence 1 establishes that HLA-DR4 lymphocytes injected into a rabbit evoke specific antibodies against Proteus bacteria. Popper sequence 2 establishes that antibodies to Proteus bacteria are present in RA patients from 14 different countries. Popper sequence 3 establishes that antibodies to Proteus bacteria in RA patients are disease specific since no such antibodies are found in other conditions. Popper sequence 4 establishes that when RA patients have high titres of antibodies to Proteus such bacteria are found in urinary cultures. Popper sequence 5 establishes that only Proteus bacteria and no other microbes evoke significantly elevated antibodies in RA patients. Popper sequence 6 establishes that the "shared epitope" EQR(K)RAA shows "molecular mimicry" with the sequence ESRRAL found in Proteus haemolysin. Popper sequence 7 establishes that Proteus urease contains a sequence IRRET which has "molecular mimicry" with LRREI found in collagen XI of hyaline cartilage. Popper sequence 8 establishes that sera obtained from RA patients have cytopathic properties against sheep red cells coated with the cross-reacting EQR(K)RAA and LRREI self-antigen peptides. Popper sequence 9 establishes that Proteus sequences in haemolysin and urease as well as the self antigens, HLA-DR1/4 and collagen XI, each contain an arginine doublet, thereby providing a substrate for peptidyl arginine deiminase (PAD) to give rise to citrulline, which is the main antigenic component of CCP, antibodies to which are found in early cases of RA. Popper sequence 10 establishes that

  12. Dalle pagine della Fackel agli Ultimi giorni dell’umanità. Karl Kraus e la guerra

    Directory of Open Access Journals (Sweden)

    Riccardo Morello

    2014-06-01

    Full Text Available From Fackel’s pages to The Last Days of Mankind. Karl Kraus and the War. Between 1915 and the end of the war, Karl Kraus, an Austrian intellectual who had made political satire and criticism of journalistic language, engages in a fierce battle against the inhumanity and cruelty of war. On the pages of Fackel, a magazine published by him for over thirty years, from 1899 to 1936, he gathers many texts that then come together in the tragedy of the Last Days of Mankind, a great work, dripping horror, which seeks to represent the unrepresentable.

  13. Students' integration of multiple representations in a titration experiment

    Science.gov (United States)

    Kunze, Nicole M.

    A complete understanding of a chemical concept is dependent upon a student's ability to understand the microscopic or particulate nature of the phenomenon and integrate the microscopic, symbolic, and macroscopic representations of the phenomenon. Acid-base chemistry is a general chemistry topic requiring students to understand the topics of chemical reactions, solutions, and equilibrium presented earlier in the course. In this study, twenty-five student volunteers from a second semester general chemistry course completed two interviews. The first interview was completed prior to any classroom instruction on acids and bases. The second interview took place after classroom instruction, a prelab activity consisting of a titration calculation worksheet, a titration computer simulation, or a microscopic level animation of a titration, and two microcomputer-based laboratory (MBL) titration experiments. During the interviews, participants were asked to define and describe acid-base concepts and in the second interview they also drew the microscopic representations of four stages in an acid-base titration. An analysis of the data showed that participants had integrated the three representations of an acid-base titration to varying degrees. While some participants showed complete understanding of acids, bases, titrations, and solution chemistry, other participants showed several alternative conceptions concerning strong acid and base dissociation, the formation of titration products, and the dissociation of soluble salts. Before instruction, participants' definitions of acid, base, and pH were brief and consisted of descriptive terms. After instruction, the definitions were more scientific and reflected the definitions presented during classroom instruction.

  14. Analysis of the Purity of Cetrimide by Titrations

    DEFF Research Database (Denmark)

    Andersen, Jens Enevold Thaulov; Rasmussen, Claus/Dallerup; Nielsen, Hans/Boye

    2006-01-01

    . Titration by perchloric acid showed a 99.69 ± 0.05 % purity of cetrimide and titration by silver nitrate showed a 99.85% ± 0.05 % purity while the traditional assay method predicted a purity of only 97.1 ± 0.4. It was found that the discrepancy could be identified as differences in selectivity during...

  15. A Closer Look at Acid-Base Olfactory Titrations

    Science.gov (United States)

    Neppel, Kerry; Oliver-Hoyo, Maria T.; Queen, Connie; Reed, Nicole

    2005-01-01

    Olfactory titrations using raw onions and eugenol as acid-base indicators are reported. An in-depth investigation on olfactory titrations is presented to include requirements for potential olfactory indicators and protocols for using garlic, onions, and vanillin as acid-base olfactory indicators are tested.

  16. Differential Binding Models for Direct and Reverse Isothermal Titration Calorimetry.

    Science.gov (United States)

    Herrera, Isaac; Winnik, Mitchell A

    2016-03-10

    Isothermal titration calorimetry (ITC) is a technique to measure the stoichiometry and thermodynamics from binding experiments. Identifying an appropriate mathematical model to evaluate titration curves of receptors with multiple sites is challenging, particularly when the stoichiometry or binding mechanism is not available. In a recent theoretical study, we presented a differential binding model (DBM) to study calorimetry titrations independently of the interaction among the binding sites (Herrera, I.; Winnik, M. A. J. Phys. Chem. B 2013, 117, 8659-8672). Here, we build upon our DBM and show its practical application to evaluate calorimetry titrations of receptors with multiple sites independently of the titration direction. Specifically, we present a set of ordinary differential equations (ODEs) with the general form d[S]/dV that can be integrated numerically to calculate the equilibrium concentrations of free and bound species S at every injection step and, subsequently, to evaluate the volume-normalized heat signal (δQ(V) = δq/dV) of direct and reverse calorimetry titrations. Additionally, we identify factors that influence the shape of the titration curve and can be used to optimize the initial concentrations of titrant and analyte. We demonstrate the flexibility of our updated DBM by applying these differentials and a global regression analysis to direct and reverse calorimetric titrations of gadolinium ions with multidentate ligands of increasing denticity, namely, diglycolic acid (DGA), citric acid (CIT), and nitrilotriacetic acid (NTA), and use statistical tests to validate the stoichiometries for the metal-ligand pairs studied.

  17. New applications of corrosion measurements by titration (CMT)

    DEFF Research Database (Denmark)

    Bech-Nielsen, Gregers

    1998-01-01

    . It is shown that when aluminium dissolves in alkali, CMT measurements can also be applied, but in this case requiring titration with alkali. Titration with alkali is also required in a special situation, where corrosion of nickel in an acid solution and subsequent formation of a nickel complex results...

  18. The coulometric titration of acids and bases in dimethylsulfoxide media

    NARCIS (Netherlands)

    Bos, M.; IJpma, S.T.; Dahmen, E.A.M.F.

    1976-01-01

    The coulometric titration of 20–200 μeq of acids and bases in DMSO media is described. In the titration of bases, the electro-oxidation of hydrogen at a platinized platinum electrode is used as the source of protons. The conditions for 100 % current efficiency at this electrode are low current

  19. Fisher statistics for analysis of diffusion tensor directional information.

    Science.gov (United States)

    Hutchinson, Elizabeth B; Rutecki, Paul A; Alexander, Andrew L; Sutula, Thomas P

    2012-04-30

    A statistical approach is presented for the quantitative analysis of diffusion tensor imaging (DTI) directional information using Fisher statistics, which were originally developed for the analysis of vectors in the field of paleomagnetism. In this framework, descriptive and inferential statistics have been formulated based on the Fisher probability density function, a spherical analogue of the normal distribution. The Fisher approach was evaluated for investigation of rat brain DTI maps to characterize tissue orientation in the corpus callosum, fornix, and hilus of the dorsal hippocampal dentate gyrus, and to compare directional properties in these regions following status epilepticus (SE) or traumatic brain injury (TBI) with values in healthy brains. Direction vectors were determined for each region of interest (ROI) for each brain sample and Fisher statistics were applied to calculate the mean direction vector and variance parameters in the corpus callosum, fornix, and dentate gyrus of normal rats and rats that experienced TBI or SE. Hypothesis testing was performed by calculation of Watson's F-statistic and associated p-value giving the likelihood that grouped observations were from the same directional distribution. In the fornix and midline corpus callosum, no directional differences were detected between groups, however in the hilus, significant (pstatistical comparison of tissue structural orientation. Copyright © 2012 Elsevier B.V. All rights reserved.

  20. Quantum Fisher and skew information for Unruh accelerated Dirac qubit

    International Nuclear Information System (INIS)

    Banerjee, Subhashish; Alok, Ashutosh Kumar; Omkar, S.

    2016-01-01

    We develop a Bloch vector representation of the Unruh channel for a Dirac field mode. This is used to provide a unified, analytical treatment of quantum Fisher and skew information for a qubit subjected to the Unruh channel, both in its pure form as well as in the presence of experimentally relevant external noise channels. The time evolution of Fisher and skew information is studied along with the impact of external environment parameters such as temperature and squeezing. The external noises are modelled by both purely dephasing phase damping and the squeezed generalised amplitude damping channels. An interesting interplay between the external reservoir temperature and squeezing on the Fisher and skew information is observed, in particular, for the action of the squeezed generalised amplitude damping channel. It is seen that for some regimes, squeezing can enhance the quantum information against the deteriorating influence of the ambient environment. Similar features are also observed for the analogous study of skew information, highlighting a similar origin of the Fisher and skew information. (orig.)

  1. Institutional And Non-Institutional Credit Supply Services To Fisher ...

    African Journals Online (AJOL)

    Women in the study area prefer the informal, non institutional credit sources than the formal, institutional source as the poor fisher-folk require collateral for this which in most cases was not available. From the study, adequate finance with more relax conditions will go a long way in alleviating poverty and improving ...

  2. Threatened fish and fishers along the Brazilian Atlantic Forest Coast.

    Science.gov (United States)

    Begossi, Alpina; Salivonchyk, Svetlana; Hallwass, Gustavo; Hanazaki, Natalia; Lopes, Priscila F M; Silvano, Renato A M

    2017-12-01

    Small-scale fisheries of the Brazilian Atlantic Forest Coast (BAFC) depend on fish resources for food and income. Thus, if the catch diminishes or if fish species that are a target for fishers are overexploited or impacted, this could affect fishers' livelihoods. The exclusion of threatened fish species from the catch is believed to be a threat to small-scale fisheries, which is likely to be the case along the BAFC. Many fish species are currently listed as threatened or vulnerable, whereas there is not enough biological information available to determine the status of the majority of the other species. Failure to protect the BAFC biodiversity might negatively impact fishers' income and the regional economy of local small-scale fisheries. We collected data from 1986 to 2009 through 347 interviews and 24-h food recall surveys at seven southeastern coastal sites of the Atlantic Forest. We show that important species of consumed fish are currently threatened: of the 65 species mentioned by fishers as the most consumed fishes, 33% are decreasing and 54% have an unknown status. Thus, biological and ecological data for BAFC marine species are urgently needed, along with co-management, to promote fish conservation.

  3. Fishing input requirements of artisanal fishers in coastal ...

    African Journals Online (AJOL)

    Efforts towards increase in fish production through artisanal fishery can be achieved by making needed inputs available. Fishing requirements of artisanal fishers in coastal communities of Ondo State, Nigeria were studied. Data were obtained from two hundred and sixteen artisans using multistage random sampling ...

  4. [Case of posterior reversible encephalopathy syndrome caused by Fisher syndrome].

    Science.gov (United States)

    Yokoi, Katsunori; Ando, Tetsuo; Kawakami, Osamu

    2018-01-26

    This report presents a case of a 71-year-old woman with Fisher syndrome who had posterior reversible encephalopathy syndrome (PRES) before the initiation of intravenous immunoglobulin (IVIg) treatment. She had symptoms of common cold 2 weeks before the onset of PRES. On the day of the onset, she began to stagger while walking. On day 2, she developed hypertension, vision impairment, and limb weakness and was admitted to the hospital. On day 3, she was provided steroid pulse therapy. On day 4, she developed convulsions and right imperfection single paralysis and was transferred to the our hospital. During the transfer, the patient was conscious. Her blood pressure was high at 198/107 mmHg. She had mild weakness in her limbs and face, light perception in both eyes, dilation of both pupils, total external ophthalmoplegia, no tendon reflexes, and limb and trunk ataxia. We diagnosed PRES because of the high signal intensities observed on T 2 -weighted MRI on both sides of the parietal and occipital lobes. We also diagnosed Fisher syndrome because of a positive anti-GQ1b immunoglobulin G antibody test and albuminocytologic dissociation in the cerebrospinal fluid. PRES showed prompt improvement with antihypertensive therapy, whereas Fisher syndrome slowly improved over a course of 2 months. This case is the first report of PRES without IVIg suggesting that Fisher syndrome induces hypertension and causes PRES.

  5. The uniqueness of the Fisher metric as information metric

    Czech Academy of Sciences Publication Activity Database

    Le, Hong-Van

    2017-01-01

    Roč. 69, č. 4 (2017), s. 879-896 ISSN 0020-3157 Institutional support: RVO:67985840 Keywords : Chentsov’s theorem * mixed topology * monotonicity of the Fisher metric Subject RIV: BA - General Mathematics OBOR OECD: Pure mathematics Impact factor: 1.049, year: 2016 https://link.springer.com/article/10.1007%2Fs10463-016-0562-0

  6. Astronaut Anna Fisher demonstrates sleep restraints on shuttle

    Science.gov (United States)

    1984-01-01

    Astronaut Anna L. Fisher demonstrates the versatility of shuttle sleep restraints to accommodate the preference of crewmembers as she appears to have configured hers in a horizontal hammock mode. Stowage lockers, one of the middeck walls, another sleep restraint, a jury-rigged foot and hand restraint are among other items in the frame.

  7. Fisher type inequalities for Euclidean t-designs

    NARCIS (Netherlands)

    Delsarte, Ph.; Seidel, J.J.

    1989-01-01

    The notion of a Euclidean t-design is analyzed in the framework of appropriate inner product spaces of polynomial functions. Some Fisher type inequalities are obtained in a simple manner by this method. The same approach is used to deal with certain analogous combinatorial designs.

  8. Optimal Fisher Discriminant Ratio for an Arbitrary Spatial Light Modulator

    Science.gov (United States)

    Juday, Richard D.

    1999-01-01

    Optimizing the Fisher ratio is well established in statistical pattern recognition as a means of discriminating between classes. I show how to optimize that ratio for optical correlation intensity by choice of filter on an arbitrary spatial light modulator (SLM). I include the case of additive noise of known power spectral density.

  9. Mortality risks and limits to population growth of fishers

    Science.gov (United States)

    Rick A. Sweitzer; Viorel D. Popescu; Craig M. Thompson; Kathryn L. Purcell; Reginald H. Barrett; Greta M. Wengert; Mourad W. Gabriel; Leslie W. Woods

    2015-01-01

    Fishers (Pekania pennanti) in the west coast states of Washington, Oregon, and California, USA have not recovered from population declines and the United States Fish and Wildlife Service has proposed options for listing them as threatened. Our objectives were to evaluate differences in survival and mortality risk from natural (e.g., predation, disease, injuries,...

  10. Appendix B: Fisher, lynx, wolverine summary of distribution information

    Science.gov (United States)

    Mary Maj

    1994-01-01

    We present maps depicting distributions of fisher, lynx, and wolverine in the western United States since 1961. Comparison of past and current distributions of species can shed light on population persistence, periods of population isolation, meta-population structure, and important connecting landscapes. Information on the distribution of the American marten is not...

  11. Astronaut William Fisher preparing to train in the WETF

    Science.gov (United States)

    1985-01-01

    Astronaut William Fisher is shown in his extravehicular mobility unit (EMU) preparing to train in the Weightless Environment Training Facility (WETF). He is wearing the communications carrier assembly but not the full helmet (32102); Reflections of the WETF can be seen on the closed visor of the EMU helmet Fiser is wearing (32103).

  12. Hazardous Waste Cleanup: Fisher Scientific in Bridgewater, New Jersey

    Science.gov (United States)

    The Fisher Scientific Packaging Facility is an operating facility located on approximately 58 acres in Bridgewater, New Jersey. The site is bounded to the north by Route 202. Most of the frontage on Route 202 is retail/commercial, but there are still small

  13. Quantum Fisher and skew information for Unruh accelerated Dirac qubit

    Energy Technology Data Exchange (ETDEWEB)

    Banerjee, Subhashish; Alok, Ashutosh Kumar [Indian Institute of Technology Jodhpur, Jodhpur (India); Omkar, S. [Indian Institute of Science Education and Research, Thiruvananthapuram (India)

    2016-08-15

    We develop a Bloch vector representation of the Unruh channel for a Dirac field mode. This is used to provide a unified, analytical treatment of quantum Fisher and skew information for a qubit subjected to the Unruh channel, both in its pure form as well as in the presence of experimentally relevant external noise channels. The time evolution of Fisher and skew information is studied along with the impact of external environment parameters such as temperature and squeezing. The external noises are modelled by both purely dephasing phase damping and the squeezed generalised amplitude damping channels. An interesting interplay between the external reservoir temperature and squeezing on the Fisher and skew information is observed, in particular, for the action of the squeezed generalised amplitude damping channel. It is seen that for some regimes, squeezing can enhance the quantum information against the deteriorating influence of the ambient environment. Similar features are also observed for the analogous study of skew information, highlighting a similar origin of the Fisher and skew information. (orig.)

  14. Fisher conservation in the Pacific States: field data meet genetics.

    Science.gov (United States)

    Jonathan Thompson

    2005-01-01

    Overtrapping of fishers in the early 1900s, combined with widespread habitat loss from clearcut logging, has resulted in the extirpation of this forest-dwelling carnivore throughout much of its former range in the Western United States. Poor dispersal abilities, low-density populations, and low reproductive rates all hinder the recovery of this little-known relative of...

  15. Fisher Matrix Predictions for Detecting the Cosmological 21-cm ...

    Indian Academy of Sciences (India)

    . ... tive designs are being planned for the future low frequency telescope SKA5. ... In section 4, we use the Fisher matrix analysis to make predictions for the SNR as ..... to sample Fourier modes k of a fixed magnitude k which are oriented at ...

  16. Solitary wave and periodic wave solutions for Burgers, Fisher ...

    Indian Academy of Sciences (India)

    Home; Journals; Pramana – Journal of Physics; Volume 85; Issue 1. Solitary wave and periodic wave solutions for Burgers, Fisher, Huxley and combined forms of these equations by the (′/)-expansion method. Jalil Manafian Mehrdad Lakestani. Volume 85 Issue 1 July 2015 pp 31-52 ...

  17. Fisher information and quantum mechanical models for finance

    OpenAIRE

    Nastasiuk, Vadim

    2015-01-01

    The probability distribution function (PDF) for prices on financial markets is derived by extremization of Fisher information. It is shown how on that basis the quantum-like description for financial markets arises and different financial market models are mapped by quantum mechanical ones.

  18. Three Göttingen lectures by Karl Schwarzschild, 1904-1905. (German Title: Drei Göttinger Vorlesungen Karl Schwarzschilds 1904-1905)

    Science.gov (United States)

    Schmidt-Kaler, Theodor

    Karl Schwarzschild (1873-1916), perhaps the most eminent astronomer of his time, was professor at Göttingen University from 1901 to 1909. Three of his lectures from the years 1904 to 1906 are available in the form of copy-books written by his students Arnold Kohlschütter (1883-1969) and Max Born (1882-1970). Here, an overview of these lectures is given.

  19. Karl Julius Lohnert - an unknown astronomer, experimental psychologist and teacher (German Title: Karl Julius Lohnert - ein unbekannter Astronom, experimenteller Psychologe und Lehrer)

    Science.gov (United States)

    Schmadel, Lutz D.; Guski-Leinwand, Susanne

    2011-08-01

    Karl Julius Lohnert (1885-1944) with his double biography as astronomer and psychologist is hardly known in both fields. As a student of astronomy in Heidelberg, Lohnert discovered a couple of minor planets and he dedicated one to his PhD supervisor, the famous Leipzig professor for philosophy, Wilhelm Wundt. This connection is discussed for the first time almost one century after the naming of (635) Vundtia. The paper elucidates some biographical stations of Lohnert.

  20. A generalized approach for the calculation and automation of potentiometric titrations Part 1. Acid-Base Titrations

    NARCIS (Netherlands)

    Stur, J.; Bos, M.; van der Linden, W.E.

    1984-01-01

    Fast and accurate calculation procedures for pH and redox potentials are required for optimum control of automatic titrations. The procedure suggested is based on a three-dimensional titration curve V = f(pH, redox potential). All possible interactions between species in the solution, e.g., changes

  1. Tänapäeva tantsuteatri mitu palet / Heili Einasto, Karl Toepfer

    Index Scriptorium Estoniae

    Einasto, Heili

    2015-01-01

    Vestlus San Jose ülikooli professori Karl Toepferiga nüüdisaegsest Eesti tantsuteatrist - I. Tuksami "Vassilissa", E. Tubina ja M Kesleri "Kratt", T. Olleski jt. "HTK", G. Reynoldsi ja S. Stubbsi "Gatsby", N. Rota ja G. Madia "La Dolce Vita", A. Toikka "Faust"

  2. Ideal i realnost : Karl von Gershelman - poet-hudozhnik / Mai Levin

    Index Scriptorium Estoniae

    Levin, Mai, 1942-

    2005-01-01

    Eesti päritolu kunstniku Elisabeth Rosendorff-Hoerschelmanni (1898-1984) ja Eestiga seotud kunstniku ja kirjaniku Karl von Hoerschelmanni (1899-1951) elust ja loomingust. 2004. a. augustis-oktoobris oli kunstnike tööde näitus Adamson-Ericu muuseumis

  3. Karl Ristikivi rändav Arkaadia / Janika Kronberg, Brita Melts

    Index Scriptorium Estoniae

    Kronberg, Janika, 1963-

    2012-01-01

    Artikkel jälgib Arkaadia-motiivi arengut Karl Ristikivi loomingus, toetudes nii autori poolt läbikäidud maastikele kui ka kunstikriitiku ja teoreetiku Simon Schama töödele. Käsitletakse ka Arkaadia motiivi Euroopa kultuuriloos

  4. The Psychology of Thinking, Animal Psychology, and the Young Karl Popper

    NARCIS (Netherlands)

    ter Hark, M.R.M.

    2004-01-01

    In the 1920s, Karl Popper wrote two large manuscripts on psychology that he never published. in his autobiography, Unended Quest, he attempts to reduce the importance of his work in psychology as much as possible, and in his philosophical work he is an antipsychologist. However, in this article, it

  5. The Rejectability of Karl Popper: Why Popper's Ideas Have Had So Little Influence on Social Practice.

    Science.gov (United States)

    Burgess, Tyrrell; Swann, Joanna

    2003-01-01

    Addresses the question of why Karl Popper's work has been disregarded or rejected for educational improvement and suggests a series of impediments to an acceptance of Popper's ideas. Outlines a set of principle which if adopted as a basis for practice could lead to significant improvement. (EV)

  6. [Results of school inspections in the county of Karl-Marx-Stadt (author's transl)].

    Science.gov (United States)

    Arnold, J

    1978-10-01

    Within the Health Protection in Childhood and Adolescence Research Project a hygienic inspection questionnaire was designed for schools. To test this questionnaire, 248 schools in 11 districts of the county of Karl-Marx-Stadt were inspected. From the ascertainments made, several instances are cited to point out the priorities of school hygiene.

  7. Karl Marx:"Er waart een spook door Europa" door Bart Tromp

    NARCIS (Netherlands)

    ir.ing Ruud Thelosen

    2011-01-01

    In dit in 2006 verschenen boekje van prof. Sociologie Bart Tromp, die zelf in 2007 overleed, worden niet alleen belangrijke stukken van de hand van Karl Marx zelf weergegeven, maar ook een grondige biografie en een inleiding om het belang van Marx ook voor de actualiteit te benadrukken.

  8. Problematizing the "Taken for Granted" in Educational Issues: Karl Marx, Antonio Gramsci, and Michel Foucault.

    Science.gov (United States)

    Qi, Jie

    This paper explores how educators would raise different questions about educational issues by using Karl Marx's framework, Antonio Gramsci's conception, and Michel Foucault's notions, respectively. First, the paper compares the historical perspectives of Marx and Foucault. Marx concludes that history is a progressive linear production and that…

  9. Karl Marx and the Paris Commune of 1871: Tracing Traditions of Critical Pedagogy

    Science.gov (United States)

    McGray, Robert

    2014-01-01

    In 1871, citizens of the war torn arrondissements of Paris, in the face of traumatic political and military turmoil, established a new local form of government. The Paris Commune, as this government became known as in the English world, attracted attention for its alternative political-economic organization. One notable commentator was Karl Marx…

  10. Karl Marx in One Lesson (1818-1883). Series on Public Issues No. 6.

    Science.gov (United States)

    Pejovich, Steve

    This booklet, one of a series intended to apply economic principles to major social and political issues of the day, starts from the premise that Marxism is a threat to our way of life and offers a critique of fundamental components of the social movement Marx created. The first of six subsections focuses on sources of influence on Karl Marx…

  11. USA presidendi üks peamisi nõunikke Karl Rove lahkub ametist / Kaivo Kopli

    Index Scriptorium Estoniae

    Kopli, Kaivo

    2007-01-01

    1993. aastast praeguse USA presidendi George B. Bushiga koos töötanud Karl Rove lahkub ametist perekonna huvides. K. Rove on uurimise all olnud seoses CIA agendi Valerie Plame'i paljastamisega, Senati komitee kuulas teda üle kaheksa föderaalprokuröri vallandamise uurimise raames

  12. Lidar - nesbõvshajasja estonskaja "nokia" / Karl Rebane ; interv. Julia Rodina

    Index Scriptorium Estoniae

    Rebane, Karl, 1926-2007

    2006-01-01

    Eesti NSV teadlaste poolt välja töötatud laserseade lidar, seadme ehitamisest, töötamise põhimõttest ja kasutusvaldkonnast. Akadeemik Karl Rebase sõnul ei oleks sellise ulatusega Läänemere saastamist juhtunud, kui Eestil oleks normaalne ökoloogilise kontrolli süsteem. Poliitikute suhtumisest kodumaise teaduse arengusse

  13. Karl Barth's definition of church in politics and culture: Growth points ...

    African Journals Online (AJOL)

    The article describes briefly Karl Barth's views on church, its role in politics and how it relates to culture. This is done by identifying the way in which the church participates in the social realm through its relationship with the State. The historic religious question asks whether there is a natural mutual-determining relationship ...

  14. Titration and hysteresis in epigenetic chromatin silencing

    International Nuclear Information System (INIS)

    Dayarian, Adel; Sengupta, Anirvan M

    2013-01-01

    Epigenetic mechanisms of silencing via heritable chromatin modifications play a major role in gene regulation and cell fate specification. We consider a model of epigenetic chromatin silencing in budding yeast and study the bifurcation diagram and characterize the bistable and the monostable regimes. The main focus of this paper is to examine how the perturbations altering the activity of histone modifying enzymes affect the epigenetic states. We analyze the implications of having the total number of silencing proteins, given by the sum of proteins bound to the nucleosomes and the ones available in the ambient, to be constant. This constraint couples different regions of chromatin through the shared reservoir of ambient silencing proteins. We show that the response of the system to perturbations depends dramatically on the titration effect caused by the above constraint. In particular, for a certain range of overall abundance of silencing proteins, the hysteresis loop changes qualitatively with certain jump replaced by continuous merger of different states. In addition, we find a nonmonotonic dependence of gene expression on the rate of histone deacetylation activity of Sir2. We discuss how these qualitative predictions of our model could be compared with experimental studies of the yeast system under anti-silencing drugs. (paper)

  15. Novel titration method for surface-functionalised silica

    Energy Technology Data Exchange (ETDEWEB)

    Hofen, Kai; Weber, Siegfried [Department of Biotechnology, University of Applied Sciences, Mannheim (Germany); Chan, Chiu Ping Candace [School of Advanced Manufacturing and Mechanical Engineering, Mawson Institute, University of South Australia, Mawson Lakes Blvd, Mawson Lakes 5095 (Australia); Majewski, Peter, E-mail: peter.majewski@unisa.edu.au [School of Advanced Manufacturing and Mechanical Engineering, Mawson Institute, University of South Australia, Mawson Lakes Blvd, Mawson Lakes 5095 (Australia)

    2011-01-15

    This paper describes three inexpensive and fast analytical methods to characterise grafted particle surfaces. The reaction of silica with (3-aminopropyl)triethoxysilane, (3-mercaptopropyl)trimethoxysilane and N-(phosphonomethyl)iminodiacetic acid hydrate, respectively, leads to NH{sub 2}-, SO{sub 3}H- or COOH-functionalised silica, which were characterised by X-ray photoelectron spectrometry and titration in nonaqueous media as well as with two titration methods in a water-based environment. In the work presented, factors influencing the titrations are pointed out and solutions are presented to overcome these limiting factors are shown.

  16. Novel titration method for surface-functionalised silica

    International Nuclear Information System (INIS)

    Hofen, Kai; Weber, Siegfried; Chan, Chiu Ping Candace; Majewski, Peter

    2011-01-01

    This paper describes three inexpensive and fast analytical methods to characterise grafted particle surfaces. The reaction of silica with (3-aminopropyl)triethoxysilane, (3-mercaptopropyl)trimethoxysilane and N-(phosphonomethyl)iminodiacetic acid hydrate, respectively, leads to NH 2 -, SO 3 H- or COOH-functionalised silica, which were characterised by X-ray photoelectron spectrometry and titration in nonaqueous media as well as with two titration methods in a water-based environment. In the work presented, factors influencing the titrations are pointed out and solutions are presented to overcome these limiting factors are shown.

  17. The fluorimetric titration of zirconium in the ppm-range

    International Nuclear Information System (INIS)

    Linden, W.E. von der; Boef, G. den; Ozinga, W.

    1976-01-01

    A fluorimetric titration of zirconium(IV) with EDTA is proposed. The fluorescence intensity of the zirconium-morin complex is used to indicate the end-point. More than twenty other cations were investigated and it was found that they did not interfere, neither did common anions. Mercury(II) can only be tolerated in amount not exceeding that of zirconium. Bismuth(III) interferes and hafnium(IV0 is titrated together with zirconium. The relative standard deviation of the titration of 10ml of a solution containing 1 ppm of zirconium does not exceed 1.5%

  18. Determination of boron as boric acid by automatic potentiometric titration

    International Nuclear Information System (INIS)

    Midgley, D.

    1988-06-01

    Boron in PWR primary coolant and related waters may be determined as boric acid by titration with sodium hydroxide, using a glass electrode as a pH indicator. With a modern automatic titrator, the analysis is quick, convenient, accurate and precise. In the titration of 8 mg B (e.g. 4 ml of 2000 mg 1 -1 solution), no significant bias was observed and relative standard deviations were about 0.25%. With 0.8 g B, a bias of about 2% appears, although this could be reduced by restandardizing the titrant, but the relative standard deviation was still -1 B, depending on the stage of the fuel cycle. (author)

  19. The Potentiometric Titration of Filtrates from the Bachmann Process

    Science.gov (United States)

    1942-06-23

    SCIENTIFIC RESEARCH AND DEVELOP11ENT The Potentiometric Titration of Filtrates from the Bachmann Process (OD-12) by F. C. Whitmore OSRD No. 654... Potentiometric Titration of Synthetic Mixtures. A? Nitric Acid-Acetic Acid. A sample of 60 ml. glacial acetic acid war diluted to 200 ml. with distilled...i4flinflr?fj3 TADLE 1 CO) |S?lDBnTl» POTENTIOMETRIC TITRATION OF SYNTHETIC t’.IXTURES WITH CONCENTRATED AJKDNIUM HYDROXIDE A; unonium HNO-j- AcOfi Ky

  20. Astronaut Anna Fisher practices control of the RMS in a trainer

    Science.gov (United States)

    1984-01-01

    Astronaut Anna Lee Fisher, mission specialist for 51-A, practices control of the remote manipulator system (RMS) at a special trainer at JSC. Dr. Fisher is pictured in the manipulator development facility (MDF) of JSC's Shuttle mockup and integration laboratory.

  1. Hazardous Waste Cleanup: Fisher Scientific Chemical Division in Fair Lawn, New Jersey

    Science.gov (United States)

    Fisher Scientific Chemical Division occupies a 10-acre site at 1 Reagent Lane in the Fair Lawn Industrial Park, New Jersey. Since 1955, Fisher has formulated, distilled, repackaged and distributed high-purity, laboratory-grade reagents and solvents.

  2. Fisher information, kinetic energy and uncertainty relation inequalities

    International Nuclear Information System (INIS)

    Luo Shunlong

    2002-01-01

    By interpolating between Fisher information and mechanical kinetic energy, we introduce a general notion of kinetic energy with respect to a parameter of Schroedinger wavefunctions from a statistical inference perspective. Kinetic energy is the sum of Fisher information and an integral of a parametrized analogue of quantum mechanical current density related to phase. A family of integral inequalities concerning kinetic energy and moments are established, among which the Cramer-Rao inequality and the Weyl-Heisenberg inequality, are special cases. In particular, the integral inequalities involving the negative order moments are relevant to the study of electron systems. Moreover, by specifying the parameter to a scale, we obtain a family of inequalities of uncertainty relation type which incorporate the position and momentum observables symmetrically in a single quantity. (author)

  3. [Charles Miller Fisher: the grandmaster of neurological observation].

    Science.gov (United States)

    Fukutake, Toshio

    2014-11-01

    Charles Miller Fisher is widely regarded as the father of modern stroke neurology. He discovered almost all pathomechanisms of cerebral infarction, including embolism from atrial fibrillation, carotid artery disease, and lacunar infarcts and their syndromes, by the most meticulous clinico-pathological observations. Moreover, his work provided the basis for treatments such as anticoagulation, antiplatelet therapy, and carotid endarterectomy. He also contributed greatly to several topics of General Neurology; for example, migraine, normal pressure hydrocephalus, and Miller Fisher syndrome. In his late years, he tried to expand the neurological field to the more complex disorders of human behavior, including hysteria, dementia, and ill-defined pain syndromes. He thus became known as the grandmaster of refined neurological observation. His lifelong detailed studies were crucially important in helping neurologists all over the world recognize disorders and syndromes that had not previously been understood.

  4. A lattice Boltzmann model for the Burgers-Fisher equation.

    Science.gov (United States)

    Zhang, Jianying; Yan, Guangwu

    2010-06-01

    A lattice Boltzmann model is developed for the one- and two-dimensional Burgers-Fisher equation based on the method of the higher-order moment of equilibrium distribution functions and a series of partial differential equations in different time scales. In order to obtain the two-dimensional Burgers-Fisher equation, vector sigma(j) has been used. And in order to overcome the drawbacks of "error rebound," a new assumption of additional distribution is presented, where two additional terms, in first order and second order separately, are used. Comparisons with the results obtained by other methods reveal that the numerical solutions obtained by the proposed method converge to exact solutions. The model under new assumption gives better results than that with second order assumption. (c) 2010 American Institute of Physics.

  5. Fisher information metrics for binary classifier evaluation and training

    CERN Multimedia

    CERN. Geneva

    2018-01-01

    Different evaluation metrics for binary classifiers are appropriate to different scientific domains and even to different problems within the same domain. This presentation focuses on the optimisation of event selection to minimise statistical errors in HEP parameter estimation, a problem that is best analysed in terms of the maximisation of Fisher information about the measured parameters. After describing a general formalism to derive evaluation metrics based on Fisher information, three more specific metrics are introduced for the measurements of signal cross sections in counting experiments (FIP1) or distribution fits (FIP2) and for the measurements of other parameters from distribution fits (FIP3). The FIP2 metric is particularly interesting because it can be derived from any ROC curve, provided that prevalence is also known. In addition to its relation to measurement errors when used as an evaluation criterion (which makes it more interesting that the ROC AUC), a further advantage of the FIP2 metric is ...

  6. Explicit solutions of Fisher's equation with three zeros

    Directory of Open Access Journals (Sweden)

    M. F. K. Abur-Robb

    1990-01-01

    Full Text Available Explicit traveling wave solutions of Fisher's equation with three simple zeros ut=uxx+u(1−u(u−a, a∈(0,1, are obtained for the wave speeds C=±2(12−a suggested by pure analytic considerations. Two types of solutions are obtained: one type is of a permanent wave form whereas the other is not.

  7. Self-organization analysis for a nonlocal convective Fisher equation

    Energy Technology Data Exchange (ETDEWEB)

    Cunha, J.A.R. da [Instituto de Fisica, Universidade de Brasilia, 70919-970 Brasilia DF (Brazil); International Center for Condensed Matter Physics, CP 04513, 70919-970 Brasilia DF (Brazil); Penna, A.L.A. [Instituto de Fisica, Universidade de Brasilia, 70919-970 Brasilia DF (Brazil); International Center for Condensed Matter Physics, CP 04513, 70919-970 Brasilia DF (Brazil)], E-mail: penna.andre@gmail.com; Vainstein, M.H. [Instituto de Fisica, Universidade de Brasilia, 70919-970 Brasilia DF (Brazil); International Center for Condensed Matter Physics, CP 04513, 70919-970 Brasilia DF (Brazil); Morgado, R. [International Center for Condensed Matter Physics, CP 04513, 70919-970 Brasilia DF (Brazil); Departamento de Matematica, Universidade de Brasilia, 70910-900 Brasilia DF (Brazil); Oliveira, F.A. [Instituto de Fisica, Universidade de Brasilia, 70919-970 Brasilia DF (Brazil); International Center for Condensed Matter Physics, CP 04513, 70919-970 Brasilia DF (Brazil)

    2009-02-02

    Using both an analytical method and a numerical approach we have investigated pattern formation for a nonlocal convective Fisher equation with constant and spatial velocity fields. We analyze the limits of the influence function due to nonlocal interaction and we obtain the phase diagram of critical velocities v{sub c} as function of the width {mu} of the influence function, which characterize the self-organization of a finite system.

  8. Takotsubo cardiomyopathy associated with Miller-Fisher syndrome.

    Science.gov (United States)

    Gill, Dalvir; Liu, Kan

    2017-07-01

    51-year-old female who presented with progressive paresthesia, numbness of the lower extremities, double vision, and trouble walking. Physical exam was remarkable for areflexia, and ptosis. Her initial EKG showed nonspecific ST segment changes and her Troponin T was elevated to 0.41ng/mL which peaked at 0.66ng/mL. Echocardiogram showed a depressed left ventricular ejection fraction to 35% with severely hypokinetic anterior wall and left ventricular apex was severely hypokinetic. EMG nerve conduction study showed severely decreased conduction velocity and prolonged distal latency in all nerves consistent with demyelinating disease. She was treated with 5days of intravenous immunoglobulin therapy to which she showed significant improvement in strength in her lower extremities. Echocardiogram repeated 4days later showing an improved left ventricular ejection fraction of 55% and no left ventricular wall motion abnormalities. Takotsubo cardiomyopathy is a rare complication of Miller-Fisher syndrome and literature review did not reveal any cases. Miller-Fisher syndrome is an autoimmune process that affects the peripheral nervous system causing autonomic dysfunction which may involve the heart. Due to significant autonomic dysfunction in Miller-Fisher syndrome, it could lead to arrhythmias, blood pressure changes, acute coronary syndrome and myocarditis, Takotsubo cardiomyopathy can be difficult to distinguish. The treatment of Takotsubo cardiomyopathy is supportive with beta-blockers and angiotensin-converting enzyme inhibitors are recommended until left ventricle ejection fraction improvement. Takotsubo cardiomyopathy is a rare complication during the acute phase of Miller-Fisher syndrome and must be distinguished from autonomic dysfunction as both diagnoses have different approaches to treatment. Published by Elsevier Inc.

  9. Generalized Fisher index or Siegel-Shapley decomposition?

    International Nuclear Information System (INIS)

    De Boer, Paul

    2009-01-01

    It is generally believed that index decomposition analysis (IDA) and input-output structural decomposition analysis (SDA) [Rose, A., Casler, S., Input-output structural decomposition analysis: a critical appraisal, Economic Systems Research 1996; 8; 33-62; Dietzenbacher, E., Los, B., Structural decomposition techniques: sense and sensitivity. Economic Systems Research 1998;10; 307-323] are different approaches in energy studies; see for instance Ang et al. [Ang, B.W., Liu, F.L., Chung, H.S., A generalized Fisher index approach to energy decomposition analysis. Energy Economics 2004; 26; 757-763]. In this paper it is shown that the generalized Fisher approach, introduced in IDA by Ang et al. [Ang, B.W., Liu, F.L., Chung, H.S., A generalized Fisher index approach to energy decomposition analysis. Energy Economics 2004; 26; 757-763] for the decomposition of an aggregate change in a variable in r = 2, 3 or 4 factors is equivalent to SDA. They base their formulae on the very complicated generic formula that Shapley [Shapley, L., A value for n-person games. In: Kuhn H.W., Tucker A.W. (Eds), Contributions to the theory of games, vol. 2. Princeton University: Princeton; 1953. p. 307-317] derived for his value of n-person games, and mention that Siegel [Siegel, I.H., The generalized 'ideal' index-number formula. Journal of the American Statistical Association 1945; 40; 520-523] gave their formulae using a different route. In this paper tables are given from which the formulae of the generalized Fisher approach can easily be derived for the cases of r = 2, 3 or 4 factors. It is shown that these tables can easily be extended to cover the cases of r = 5 and r = 6 factors. (author)

  10. Traditional botanical knowledge of artisanal fishers in southern Brazil.

    Science.gov (United States)

    Baptista, Marcela Meneghetti; Ramos, Marcelo Alves; de Albuquerque, Ulysses Paulino; Coelho-de-Souza, Gabriela; Ritter, Mara Rejane

    2013-07-30

    This study characterized the botanical knowledge of artisanal fishers of the Lami community, Porto Alegre, southern Brazil based on answers to the following question: Is the local botanical knowledge of the artisanal fishers of the rural-urban district of Lami still active, even since the district's insertion into the metropolitan region of Porto Alegre? This region, which contains a mosaic of urban and rural areas, hosts the Lami Biological Reserve (LBR) and a community of 13 artisanal fisher families. Semi-structured interviews were conducted with 15 fishers, complemented by participatory observation techniques and free-lists; in these interviews, the species of plants used by the community and their indicated uses were identified. A total of 111 species belonging to 50 families were identified. No significant differences between the diversities of native and exotic species were found. Seven use categories were reported: medicinal (49%), human food (23.2%), fishing (12.3%), condiments (8%), firewood (5%), mystical purposes (1.45%), and animal food (0.72%). The medicinal species with the highest level of agreement regarding their main uses (AMUs) were Aloe arborescens Mill., Plectranthus barbatus Andrews, Dodonaea viscosa Jacq., Plectranthus ornatus Codd, Eugenia uniflora L., and Foeniculum vulgare Mill. For illness and diseases, most plants were used for problems with the digestive system (20 species), followed by the respiratory system (16 species). This community possesses a wide botanical knowledge, especially of medicinal plants, comparable to observations made in other studies with fishing communities in coastal areas of the Atlantic Forest of Brazil. Ethnobotanical studies in rural-urban areas contribute to preserving local knowledge and provide information that aids in conserving the remaining ecosystems in the region.

  11. Renormalization analysis of catalytic Wright-Fisher diffusions

    Czech Academy of Sciences Publication Activity Database

    Swart, Jan M.; Fleischmann, K.

    2006-01-01

    Roč. 2006, č. 11 (2006), s. 585-654 ISSN 1083-6489 R&D Projects: GA ČR GA201/06/1323 Institutional research plan: CEZ:AV0Z10750506 Keywords : renormalization * catalytic Wright-Fisher diffusion * embedded particle system * extinction * unbounded growth * interacting diffusions * universality Subject RIV: BA - General Mathematics Impact factor: 0.676, year: 2006

  12. Scaling of quantum Fisher information close to the quantum phase transition in the XY spin chain

    Energy Technology Data Exchange (ETDEWEB)

    Ye, En-Jia, E-mail: yeenjia@jiangnan.edu.cn [Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, School of Science, Jiangnan University, Wuxi 214122 (China); Hu, Zheng-Da [Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, School of Science, Jiangnan University, Wuxi 214122 (China); Wu, Wei [Zhejiang Institute of Modern Physics and Physics Department, Zhejiang University, Hangzhou 310027 (China)

    2016-12-01

    The quantum phase transition of an XY spin chain is investigated by employing the quantum Fisher information encoded in the ground state. It is shown that the quantum Fisher information is an effective tool for characterizing the quantum criticality. The quantum Fisher information, its first and second derivatives versus the transverse field display the phenomena of sudden transition, sudden jump and divergence, respectively. Besides, the analysis of finite size scaling for the second derivative of quantum Fisher information is performed.

  13. The Tully-Fisher relation of the IRAS minisurvey galaxies

    Science.gov (United States)

    Van Driel, W.; Van Den Broek, A. C.; Baan, W. A.

    1995-01-01

    We investigated the possible influence on the Tully-Fisher relation of active massive star formation in IRAS galaxies, in order to estimate the contribution of star formation to their near-infrared luminosity. We observed 60 galaxies from the infrared complete so-called IRAS Minisurvey sample in the 21 cm H1 line at Arecibo, determined the near-infrared (H-band) Tully-Fisher relation for the 36 objects in the sample we judged to be usable for this purpose, and compared this relation with that of optically selected normal galaxies. The results show no significant enhancement of the near-infrared luminosities of the IRAS Minisurvey galaxies compared to those of the optically selected normal glaxies. From these results we inferred that in the minisurvey galaxies the average contribution of the active massive star formation to the total near-infrared luminosity is less and that exponential decay times for the starbursts occurring in the Minisurvey galaxies are of the order of 10 Myr. The Tully-Fisher relation shows one exceptional galaxy (IRAS 03565+2139) with an about 25 times higher luminosity than average for its rotational velocity.

  14. Single and simultaneous binary mergers in Wright-Fisher genealogies.

    Science.gov (United States)

    Melfi, Andrew; Viswanath, Divakar

    2018-05-01

    The Kingman coalescent is a commonly used model in genetics, which is often justified with reference to the Wright-Fisher (WF) model. Current proofs of convergence of WF and other models to the Kingman coalescent assume a constant sample size. However, sample sizes have become quite large in human genetics. Therefore, we develop a convergence theory that allows the sample size to increase with population size. If the haploid population size is N and the sample size is N 1∕3-ϵ , ϵ>0, we prove that Wright-Fisher genealogies involve at most a single binary merger in each generation with probability converging to 1 in the limit of large N. Single binary merger or no merger in each generation of the genealogy implies that the Kingman partition distribution is obtained exactly. If the sample size is N 1∕2-ϵ , Wright-Fisher genealogies may involve simultaneous binary mergers in a single generation but do not involve triple mergers in the large N limit. The asymptotic theory is verified using numerical calculations. Variable population sizes are handled algorithmically. It is found that even distant bottlenecks can increase the probability of triple mergers as well as simultaneous binary mergers in WF genealogies. Copyright © 2018 Elsevier Inc. All rights reserved.

  15. Fishing, fish consumption and advisory awareness among Louisiana's recreational fishers.

    Science.gov (United States)

    Katner, Adrienne; Ogunyinka, Ebenezer; Sun, Mei-Hung; Soileau, Shannon; Lavergne, David; Dugas, Dianne; Suffet, Mel

    2011-11-01

    This paper presents results from the first known population-based survey of recreational fishers in Louisiana (n=1774). The ultimate goal of this study was to obtain data in support of the development of regional advisories for a high exposure population with unique seafood consumption patterns. Between July and August of 2008, a survey was mailed to a random sample of licensed recreational fishers to characterize local fishing habits, sportfish consumption, and advisory awareness. Eighty-eight percent of respondents reported eating sportfish. Respondents ate an estimated mean of four fish meals per month, of which, approximately half were sportfish. Over half of all sportfish meals (54%) were caught in the Gulf of Mexico or bordering brackish areas. Sportfish consumption varied by license and gender; and was highest among Sportsman's Paradise license holders (2.8±0.2 meals per month), and males (2.2±0.1 meals per month). The most frequently consumed sportfish species were red drum, speckled trout, catfish, bass, crappie and bream. Advisory awareness rates varied by gender, ethnicity, geographic area, license type, age and education; and were lowest among women (53%), African-Americans (43%), fishers from the southeast of Louisiana (50%), holders of Senior Hunting and Fishing licenses (51%), individuals between 15 and 19 years of age (41%), and individuals with less than a high school education (43%). Results were used to identify ways to optimize monitoring, advisory development and outreach activities. Copyright © 2011 Elsevier Inc. All rights reserved.

  16. Canine Distemper in an isolated population of fishers (Martes pennanti) from California

    Science.gov (United States)

    Stefan m. Keller; Mourad Gabriel; Karen A. Terio; Edward J. Dubovi; Elizabeth Van Wormer; Rick Sweitzer; Reginald Barret; Craig Thompson; Kathryn Purcell; Linda Munson

    2012-01-01

    Four fishers (Martes pennanti) from an insular population in the southern Sierra Nevada Mountains, California, USA died as a consequence of an infection with canine distemper virus (CDV) in 2009. Three fishers were found in close temporal and spatial relationship; the fourth fisher died 4 mo later at a 70 km distance from the initial group. Gross...

  17. 77 FR 75670 - Importer of Controlled Substances; Notice of Registration; Fisher Clinical Services,Inc.

    Science.gov (United States)

    2012-12-21

    ... Registration; Fisher Clinical Services,Inc. By Notice dated September 20, 2012, and published in the Federal Register on October 2, 2012, 77 FR 60143, Fisher Clinical Services, Inc., 7554 Schantz Road, Allentown... that the registration of Fisher Clinical Services, Inc., to import the basic class of controlled...

  18. 78 FR 23958 - Importer of Controlled Substances: Notice of Registration; Fisher Clinical Services, Inc.

    Science.gov (United States)

    2013-04-23

    ... Registration; Fisher Clinical Services, Inc. By Notice dated November 27, 2012, and published in the Federal Register on December 5, 2012, 77 FR 72409, Fisher Clinical Services, Inc., 7554 Schantz Road, Allentown... the registration of Fisher Clinical Services, Inc., to import the basic class of controlled substance...

  19. 78 FR 5497 - Importer of Controlled Substances; Notice of Registration; Fisher Clinical Services, Inc.

    Science.gov (United States)

    2013-01-25

    ... Registration; Fisher Clinical Services, Inc. By Notice dated November 1, 2012, and published in the Federal Register on November 9, 2012, 77 FR 67396, Fisher Clinical Services, Inc., 7554 Schantz Road, Allentown... the registration of Fisher Clinical Services, Inc., to import the basic class of controlled substance...

  20. When reintroductions are augmentations: the genetic legacy of the fisher (Martes pennanti) in Montana

    Science.gov (United States)

    Ray S. Vinkey; Michael K. Schwartz; Kevin S. McKelvey; Kerry R. Foresman; Kristine L. Pilgrim; Brian J. Giddings; Eric C. Lofroth

    2006-01-01

    Fishers (Martes pennanti) were purportedly extirpated from Montana by 1930 and extant populations are assumed to be descended from translocated fishers. To determine the lineage of fisher populations, we sequenced 2 regions of the mitochondrial DNA genome from 207 tissue samples from British Columbia, Minnesota, Wisconsin, and Montana. In...

  1. Simple home-made sensors for potentiometric titrations

    International Nuclear Information System (INIS)

    Selig, W.

    1982-04-01

    A sensor for potentiometric titrations was prepared by coating a spectroscopic graphite rod with a solution of poly(vinyl chloride) and dioctyphthalate in tetrahydrofuran. The reference electrode was an Ag/AgCl single-junction electrode. The sensor was used in precipitation, acid-base, compleximetric, and redox titrations. Preparation of the coated-graphite sensor is simple and rapid. Moreover, it is quite inexpensive. A limitation is its applicability in aqueous media only, because organic solvents will dissolve the membrane. Various uncoated types of graphite have also been investigated as sensors, particularly in two applications of interest in the analysis of propellants: the titration of nitroform and perchlorate. Obviously, these sensors can be used also in nonaqueous, or partially nonaqueous media. These sensors may also find use in the potentiometric titration of fluoride vs La(III) or Th

  2. Spectrophotometric titration of sulfates in the presence of zirconium

    International Nuclear Information System (INIS)

    Kuznetsov, V.V.; Kotova, S.S.; Molokanova, L.G.; Chekmarev, A.M.; Yagodin, G.A.

    1978-01-01

    The procedure has been proposed for express determination of sulphate ions in the presence of zirconium by spectrophotometric titration with the use of barium chloride and nitrochromazo as an indicator. The procedure is based on bonding zirconium into a more stable complex with EDTA (ethylenediaminotetraacetic acid). The presence of excess of EDTA and zirconium (4) complexonate in the solution being titrated does not affect the titration curve shape and the character of break on the curve in the equivalence point. A complete demasking of SO 4 2- is observed in the case of 1O-fold excess of EDTA with respect to zirconium (4). Statistic evaluation of the method has shown that the results of titration can be distorted by chance errors only

  3. Coulometric titration of niobium in 1F sulfuric acid

    International Nuclear Information System (INIS)

    Pannu, S.S.

    1975-01-01

    A coulometric titration at constant current has been devised for Nb in 1F sulfuric acid. The titration was based on the oxidation of Nb(III) to Nb(V) by Fe(III) electrogenerated at a graphite anode. Both potentiometric and amperometric end points were used. The Nb(V) was prior reduced at a mercury cathode by exhaustive electrolysis at a current density of 15 ma/mc 2 for at least 10 hr. Ta,V,Ti and a working platinum anode interfered, but the separation of the potentials of Nb(V)/Nb(III) and Ti(IV)/Ti(III) permitted the titration of first Nb and then Ti. The average error for the titration of 0.30 to 13.00 mg of niobium in 100 ml of 1F sulfuric acid was + 0.57%. (author)

  4. Coulometric titration of niobium in EDTA complexing solution

    International Nuclear Information System (INIS)

    Pannu, S.S.

    1976-01-01

    Constant current coulometry of Nb in EDTA was studied employing both potentiometric and amperometric end-point techniques. The titrations were based on the oxidation of Nb(IV)-EDTA with electrogenerated Fe(III) at a graphite anode. The rate of disproportionation of Nb(IV)-EDTA was found to be slow enough not to effect the accuracy sought for the titration. The coulometric titration of Nb in EDTA was found to be more accurate than in 1F sulfuric acid. The mean error in the titrations of 4.76 to 19.65 of Nb in a volume of about 100 ml of 0.02 to 0.04F EDTA was 0.13%. It was found that Ta may be tolerated to a ratio of 1:4, Ta:Nb, in a solution containing 13 mg of Nb. (author)

  5. Green chemistry volumetric titration kit for pharmaceutical formulations: Econoburette

    Directory of Open Access Journals (Sweden)

    Man Singh

    2009-08-01

    Full Text Available Stopcock SC and Spring Sp models of Econoburette (Calibrated, RTC (NR, Ministry of Small Scale Industries, Government of India, developed for semimicro volumetric titration of pharmaceutical formulations are reported. These are economized and risk free titration where pipette is replaced by an inbuilt pipette and conical flask by inbuilt bulb. A step of pipetting of stock solution by mouth is deleted. It is used to allow solution exposure to user’s body. This risk is removed and even volatile and toxic solutions are titrated with full proof safety. Econoburette minimizes use of materials and time by 90 % and prevent discharge of polluting effluent to environment. Few acid and base samples are titrated and an analysis of experimental expenditure is described in the papers.

  6. Potentiometric titration of free acid in uranium solutions

    International Nuclear Information System (INIS)

    Suh, M. Y.; Kim, W. H.; Kim, J. S.; Sohn, S. C.; Eom, T. Y.; Lee, C. H.; Jeon, Y. S.; Han, S. H.

    1998-02-01

    Hydrolysis properties of metal cations and fundamental principles of the potentiometric titration of free acid in aqueous solutions containing metal cations were described. The published papers and reports for the alkalimetric and acidimetric titration of free acid were surveyed, and the applicability of these titration methods to the uranium and/or plutonium solutions were discussed. This technical report also includes the various results obtained from the authors' researches to establish the alkalimetric and acidimetric titration methods for the determination of free acid in nitric acid solutions containing uranium and/or oxalic acid, and aluminum. The procedure manuals used in chemical processes and the newly prepared manuals based on the authors' researches are appended. (author). 26 refs., 54 figs

  7. Potentiometric titration of free acid in uranium solutions

    Energy Technology Data Exchange (ETDEWEB)

    Suh, M. Y.; Kim, W. H.; Kim, J. S.; Sohn, S. C.; Eom, T. Y.; Lee, C. H.; Jeon, Y. S.; Han, S. H.

    1998-02-01

    Hydrolysis properties of metal cations and fundamental principles of the potentiometric titration of free acid in aqueous solutions containing metal cations were described. The published papers and reports for the alkalimetric and acidimetric titration of free acid were surveyed, and the applicability of these titration methods to the uranium and/or plutonium solutions were discussed. This technical report also includes the various results obtained from the authors` researches to establish the alkalimetric and acidimetric titration methods for the determination of free acid in nitric acid solutions containing uranium and/or oxalic acid, and aluminum. The procedure manuals used in chemical processes and the newly prepared manuals based on the authors` researches are appended. (author). 26 refs., 54 figs.

  8. A Titration Technique for Demonstrating a Magma Replenishment Model.

    Science.gov (United States)

    Hodder, A. P. W.

    1983-01-01

    Conductiometric titrations can be used to simulate subduction-setting volcanism. Suggestions are made as to the use of this technique in teaching volcanic mechanisms and geochemical indications of tectonic settings. (JN)

  9. A microcomputer-controlled system for titration analysis

    NARCIS (Netherlands)

    Boelema, Gerrit Jan

    1982-01-01

    This thesis deals with the results of the implementation of microprocessor technology in automatic titration equipment to obtain a versatile system for pharmaceutical, chemical analytical and optimization research purposes. ... Zie: Summary

  10. Carbon dioxide titration method for soil respiration measurements

    OpenAIRE

    Martín Rubio, Luis

    2017-01-01

    This thesis was commissioned by Tampere University of Applied Sciences, which was interested in studying and developing a titration measurement method for soil respiration and biodegradability. Some experiments were carried out measuring soil respiration for testing the method and others adding some biodegradable material like polylactic acid compressed material and 100% biodegradable plastic bags to test its biodegradability and the possibility to measure it via titration. The thesi...

  11. A fully automatic system for acid-base coulometric titrations

    OpenAIRE

    Cladera, A.; Caro, A.; Estela, J. M.; Cerdà, V.

    1990-01-01

    An automatic system for acid-base titrations by electrogeneration of H+ and OH- ions, with potentiometric end-point detection, was developed. The system includes a PC-compatible computer for instrumental control, data acquisition and processing, which allows up to 13 samples to be analysed sequentially with no human intervention. The system performance was tested on the titration of standard solutions, which it carried out with low errors and RSD. It was subsequently applied to the analysis o...

  12. Amperometric titration of indium with edta solution in propanol

    International Nuclear Information System (INIS)

    Gevorgyan, A.M.; Talipov, Sh.T.; Khadeev, V.A.; Kostylev, V.S.; Khadeeva, L.A.

    1980-01-01

    Optimum conditions have been chosen for titration of indium with EDTA solution in anhydrous propanol and its mixtures with some aprotic solvents using amperometric and point detection. A procedure is suggested of determining indium microcontents in the presence of large amounts of other elements. The procedure is based on its extraction preseparation followed by direct titration in the extract with a standard EDTA solution [ru

  13. Thermometric titrations of amines with nitrosyl perchlorate in acetonitrile solvent.

    Science.gov (United States)

    Gündüz, T; Kiliç, E; Cakirer, O

    1996-05-01

    Thirteen aliphatic and four aromatic amines, namely diethylamine, triethylamine, n-propylamine, di-n-propylamine, tri-n-butylamine, isopropylamine, di-isopropylamine, n-butylamine, di-n-butylamine, tri-n-butylamine, isobutylamine, sec-butylamine, tert-butylamine, aniline, N,N-dimethylaniline, 2-nitroaniline and 4-nitroaniline were titrated thermometrically with nitrosyl perchlorate in acetonitrile solvent. All the aliphatic amines gave very well-shaped thermometric titration curves. The calculated recovery values of the amines were very good. In comparison, the aromatic amines, aniline and N,N-dimethylaniline gave rather well-shaped titration curves, but the recovery values were fairly low. 2-Nitro- and 4-nitro anilines gave no thermometric response at all. The heats of reaction of the amines with nitrosyl perchlorate are rather high. However, the average heat of reaction of the aromatic amines is approximately two-thirds that of the average heat of the aliphatic amines. To support this method all the amines were also titrated potentiometrically and very similar results to those obtained with the thermometric method are seen. The nitrosyl ion is a Lewis acid, strong enough to titrate quantitatively aliphatic amines in acetonitrile solvent, but not strong enough to titrate aromatic amines at the required level in the same solvent.

  14. Gran method for end point anticipation in monosegmented flow titration

    Directory of Open Access Journals (Sweden)

    Aquino Emerson V

    2004-01-01

    Full Text Available An automatic potentiometric monosegmented flow titration procedure based on Gran linearisation approach has been developed. The controlling program can estimate the end point of the titration after the addition of three or four aliquots of titrant. Alternatively, the end point can be determined by the second derivative procedure. In this case, additional volumes of titrant are added until the vicinity of the end point and three points before and after the stoichiometric point are used for end point calculation. The performance of the system was assessed by the determination of chloride in isotonic beverages and parenteral solutions. The system employs a tubular Ag2S/AgCl indicator electrode. A typical titration, performed according to the IUPAC definition, requires only 60 mL of sample and about the same volume of titrant (AgNO3 solution. A complete titration can be carried out in 1 - 5 min. The accuracy and precision (relative standard deviation of ten replicates are 2% and 1% for the Gran and 1% and 0.5% for the Gran/derivative end point determination procedures, respectively. The proposed system reduces the time to perform a titration, ensuring low sample and reagent consumption, and full automatic sampling and titrant addition in a calibration-free titration protocol.

  15. Karl Marx, un periodista en la Era del Capital. Apuntes para una investigación

    Directory of Open Access Journals (Sweden)

    Espinoza Pino, Mario

    2014-06-01

    Full Text Available The aim of this article is to criticize the traditional representation of Karl Marx’s journalistic works, usually forgotten by a misleading canon that assumes his articles only as a minor work. One of the problems of this traditional conception is that it dissociates his theoretical and economic contributions from the historical development of the author’s thought (and also from its material roots. We will try to point the importance of Karl Marx’s mature journalism in two areas: in the construction of the central concepts of his critic against the capitalist mode of production (surplus value, a multilineal historical perspective, a global description of the world market, etc. and in the production of political cartographies to intervene in the class conflict. This article poses several hypothesis and tentative affirmations about Karl Marx’s journalism that may serve as a point of departure for a critical research.El objetivo de este artículo es criticar la representación tradicional del trabajo periodístico de Karl Marx, habitualmente olvidado por un canon engañoso que sólo asume sus artículos al precio de convertirlos en una obra menor. Uno de los problemas de esta concepción tradicional es que disocia sus contribuciones teóricas y económicas del desarrollo histórico del pensamiento del autor (y también de sus raíces materiales. Intentaremos señalar la importancia del periodismo maduro de Karl Marx en dos áreas: en la construcción de los conceptos centrales de su crítica contra el capitalismo (plusvalor, un enfoque histórico multilineal, una descripción global del mercado mundial, etc. y en la producción de cartografías políticas para intervenir en el conflicto de clases. Este artículo plantea varias hipótesis y afirmaciones tentativas sobre el periodismo de Karl Marx que pueden servir como punto de partida de una investigación crítica.

  16. Karl Valentin’s Illogical Subversion: issues arising from Karl Valentin’s Das Aquarium and Liesl Karlstadt’s Verein der Katzenfreund

    OpenAIRE

    Wilson, Mike; Double, Oliver

    2003-01-01

    Valentin Ludwig Fey was born on 4 June 1882 in the Munich suburb of Au, effectively the only child of an artisan-class family – his sister and two brothers all died in early childhood before Valentin Ludwig was even six months old. Valentin himself only narrowly survived a childhood encounter with diptheria (all of which, perhaps unsurprisingly, contributed to his ever-increasing hypochondria1), but he went on to become Karl Valentin, arguably the most famous German comedian and cabaret perfo...

  17. Roosna-Alliku mõisa häärber / Karl Kolopka, Nele Rohtla, Johann Schultz

    Index Scriptorium Estoniae

    Kolopka, Karl

    2004-01-01

    12 ill.; peahoone ehitati Johann Schultzi kavandite järgi, siseinterjööri ilmestava Louis XVI stiilis stukitöö tegi Karl Kolopka, häärber restaureeriti Nele Rohtla (OÜ Mõisaprojekt) suunamisel

  18. The Potassium-Argon Laser Experiment (KArLE): In Situ Geochronology for Planetary Robotic Missions

    Science.gov (United States)

    Cohen, Barbara

    2016-01-01

    The Potassium (K) - Argon (Ar) Laser Experiment (KArLE) will make in situ noble-gas geochronology measurements aboard planetary robotic landers and roverss. Laser-Induced Breakdown Spectroscopy (LIBS) is used to measure the K abun-dance in a sample and to release its noble gases; the evolved Ar is measured by mass spectrometry (MS); and rela-tive K content is related to absolute Ar abundance by sample mass, determined by optical measurement of the ablated volume. KArLE measures a whole-rock K-Ar age to 10% or better for rocks 2 Ga or older, sufficient to resolve the absolute age of many planetary samples. The LIBS-MS approach is attractive because the analytical components have been flight proven, do not require further technical development, and provide complementary measurements as well as in situ geochronology.

  19. Der Briefwechsel zwischen Alexander von Humboldt und Karl Ernst von Baer

    Directory of Open Access Journals (Sweden)

    Thomas Schmuck

    2012-10-01

    Full Text Available Zusammenfassung Der kurze, nicht vollständig erhaltene Briefwechsel zwischen Alexander von Humboldt und Karl Ernst von Baer behandelt sehr verschiedene Themen: Politik, Kriegsgefahr, den Wissenschaftsbetrieb, Auszeichnungen und Tagungen, Embryologie und Cholera. Gemeinsam mit Briefen und Reden ergibt sich dabei ein differenziertes Bild der Beurteilung der beiden Wissenschaftler durch den jeweils anderen. Während Baer sich als Bewunderer Humboldts erweist, erscheint umgekehrt Humboldts Einschätzung Baers als ambivalent. Abstract The short, not completely preserved correspondence between Alexander von Humboldt and Karl Ernst von Baer deals with a wide range of subjects: politics and the danger of war, academic activities, scientific awards and conferences, aspects of embryology and the cholera. Letters to third persons and speeches, together with the correspondence between Humboldt and Baer show a differentiated pattern of mutual appraisal: While Baer always remained an admirer of the elder naturalist, Humboldt’s estimation was characterized by ambivalence.

  20. Large-Scale Influences on the Genesis of Tropical Cyclone Karl (2010)

    Science.gov (United States)

    Griffin, K.; Bosart, L. F.

    2012-12-01

    The events leading up to the genesis of Tropical Cyclone (TC) Karl (2010) provides a unique opportunity to examine the continuing problem of understanding tropical cyclogenesis. The PRE-Depression Investigation of Cloud-systems in the Tropics (PREDICT) field campaign allowed for detailed investigation of the tropical disturbance that served as the precursor to TC Karl as it progressed westward through the Caribbean Sea. The purpose of this presentation is to examine the evolution of the pre-Karl disturbance using both common synoptic-scale analyses as well as statistically-based equatorial wave analyses, focusing on where these analyses complement and enhance each other. One of the major factors in the initial spin-up of the pre-Karl tropical disturbance is a surge of southerly and westerly winds from northern South America on 8-10 September 2010. As the surge entered the Caribbean on 9 September, it aided in the formation of a nearly closed earth-relative cyclonic circulation near the southern Leeward Islands. This circulation weakened late on 10 September and remained weak through 13 September before increased organization led to TC genesis on 14 September. This southerly wind surge can be traced to a well-defined surge of anomalously cold air and enhanced southerly winds originating in the lee of the Argentinian Andes over a week prior. While the temperature anomalies wash out prior to reaching the equator, anomalous low-level winds progress into Colombia and Venezuela, where topography aids in turning the southerly winds eastward. An investigation of the pre-Karl environment utilizing wavenumber-frequency filtering techniques also suggests that the initial spin-up of pre-Karl can be associated with the active phase of a convectively coupled Kelvin wave (CCKW). The observed formation of the nearly closed cyclonic circulation on 10 September is well timed with the passage of anomalous westerly winds along and behind the convectively active phase of a CCKW. These

  1. Exact simulation of conditioned Wright-Fisher models.

    Science.gov (United States)

    Zhao, Lei; Lascoux, Martin; Waxman, David

    2014-12-21

    Forward and backward simulations play an increasing role in population genetics, in particular when inferring the relative importance of evolutionary forces. It is therefore important to develop fast and accurate simulation methods for general population genetics models. Here we present an exact simulation method that generates trajectories of an allele׳s frequency in a finite population, as described by a general Wright-Fisher model. The method generates conditioned trajectories that start from a known frequency at a known time, and which achieve a specific final frequency at a known final time. The simulation method applies irrespective of the smallness of the probability of the transition between the initial and final states, because it is not based on rejection of trajectories. We illustrate the method on several different populations where a Wright-Fisher model (or related) applies, namely (i) a locus with 2 alleles, that is subject to selection and mutation; (ii) a locus with 3 alleles, that is subject to selection; (iii) a locus in a metapopulation consisting of two subpopulations of finite size, that are subject to selection and migration. The simulation method allows the generation of conditioned trajectories that can be used for the purposes of visualisation, the estimation of summary statistics, and the development/testing of new inferential methods. The simulated trajectories provide a very simple approach to estimating quantities that cannot easily be expressed in terms of the transition matrix, and can be applied to finite Markov chains other than the Wright-Fisher model. Copyright © 2014 Elsevier Ltd. All rights reserved.

  2. Rapid clozapine titration in treatment-refractory bipolar disorder.

    Science.gov (United States)

    Ifteni, Petru; Correll, Christoph U; Nielsen, Jimmi; Burtea, Victoria; Kane, John M; Manu, Peter

    2014-09-01

    Clozapine is effective in treatment-refractory bipolar disorder (BD). Guidelines recommend slow titration to prevent seizures, hypotension and myocarditis, but this stance is not supported by comparative data. To evaluate the safety and effectiveness of rapid clozapine titration in BD. Analysis of a consecutive cohort of treatment-refractory BD patients with mixed/manic episode admitted on alternate days to one of two units of a psychiatric hospital. On one unit, clozapine was started at 25mg followed by 25-50mg as needed every 6h (maximum=100mg/day) on day 1, followed by increases of 25-100mg/day. On the other unit, clozapine was initiated with 25mg in day 1, followed by increases of 25-50mg/day. The primary outcome was the number of days from starting clozapine until readiness for discharge, adjusted in logistic regression for the number of antipsychotics tried during the hospitalization, psychotropic co-treatments and presence of psychotic features. Patients subject to rapid (N=44) and standard (N=23) titration were similar in age, gender, smoking status, body mass index, illness severity at baseline and discharge, and highest clozapine dose. Clozapine was discontinued due to hypotension (N=1) and pneumonia (N=1) during rapid titration, and for excessive sedation (N=1) in each titration group. The number of hospital days from starting clozapine until readiness for discharge was 3.8 days shorter in the rapid titration group (12.7±6.3 vs. 16.5±5.8, p=0.0077). Rapid clozapine titration appeared safe and effective for treatment-refractory BD. The potential for shorter hospital stays justifies prospective trials of this method. Copyright © 2014 Elsevier B.V. All rights reserved.

  3. Simple expression for the quantum Fisher information matrix

    Science.gov (United States)

    Šafránek, Dominik

    2018-04-01

    Quantum Fisher information matrix (QFIM) is a cornerstone of modern quantum metrology and quantum information geometry. Apart from optimal estimation, it finds applications in description of quantum speed limits, quantum criticality, quantum phase transitions, coherence, entanglement, and irreversibility. We derive a surprisingly simple formula for this quantity, which, unlike previously known general expression, does not require diagonalization of the density matrix, and is provably at least as efficient. With a minor modification, this formula can be used to compute QFIM for any finite-dimensional density matrix. Because of its simplicity, it could also shed more light on the quantum information geometry in general.

  4. Persistence of travelling waves in a generalized Fisher equation

    International Nuclear Information System (INIS)

    Kyrychko, Yuliya N.; Blyuss, Konstantin B.

    2009-01-01

    Travelling waves of the Fisher equation with arbitrary power of nonlinearity are studied in the presence of long-range diffusion. Using analogy between travelling waves and heteroclinic solutions of corresponding ODEs, we employ the geometric singular perturbation theory to prove the persistence of these waves when the influence of long-range effects is small. When the long-range diffusion coefficient becomes larger, the behaviour of travelling waves can only be studied numerically. In this case we find that starting with some values, solutions of the model lose monotonicity and become oscillatory

  5. Research of Face Recognition with Fisher Linear Discriminant

    Science.gov (United States)

    Rahim, R.; Afriliansyah, T.; Winata, H.; Nofriansyah, D.; Ratnadewi; Aryza, S.

    2018-01-01

    Face identification systems are developing rapidly, and these developments drive the advancement of biometric-based identification systems that have high accuracy. However, to develop a good face recognition system and to have high accuracy is something that’s hard to find. Human faces have diverse expressions and attribute changes such as eyeglasses, mustache, beard and others. Fisher Linear Discriminant (FLD) is a class-specific method that distinguishes facial image images into classes and also creates distance between classes and intra classes so as to produce better classification.

  6. A Case of Neuromyelitis Optica Masquerading as Miller Fisher Syndrome

    Directory of Open Access Journals (Sweden)

    Yuka Furutani

    2014-10-01

    Full Text Available A 22-year-old woman presented with double vision that she had experienced since an infection 2 weeks previously. A neurological examination showed limited bilateral eye abduction, mimicking Miller Fisher syndrome. However, T2-weighted magnetic resonance imaging of her brain revealed hyperintense areas in the tegmentum of the pons, including the abducens nucleus, and her serum anti-aquaporin-4 antibody test was positive. She was finally diagnosed with neuromyelitis optica. Intravenous high-dose steroid therapy immediately improved the patient's abduction palsy, but bilateral optic neuritis manifested during the treatment. Subsequent treatment with plasma exchange improved her optic neuritis symptoms.

  7. Fisher information in confined hydrogen-like ions

    Science.gov (United States)

    Mukherjee, Neetik; Majumdar, Sangita; Roy, Amlan K.

    2018-01-01

    Fisher information (I) is investigated for confined hydrogen atom (CHA)-like systems in conjugate r and p spaces. A comparative study between CHA and free H atom (with respect to I) is pursued. A detailed systematic result of I with respect to variation of confinement radius rc is presented, with particular emphasis on non-zero- (l, m) states. In certain respect, inferences in CHA are significantly different from free counterpart, such as (i) dependence on n, l quantum numbers (ii) appearance of maxima in Ip plots for | m | ≠ 0 . The role of atomic number and atomic radius is discussed.

  8. Sampling Methods for Wallenius' and Fisher's Noncentral Hypergeometric Distributions

    DEFF Research Database (Denmark)

    Fog, Agner

    2008-01-01

    the mode, ratio-of-uniforms rejection method, and rejection by sampling in the tau domain. Methods for the multivariate distributions include: simulation of urn experiments, conditional method, Gibbs sampling, and Metropolis-Hastings sampling. These methods are useful for Monte Carlo simulation of models...... of biased sampling and models of evolution and for calculating moments and quantiles of the distributions.......Several methods for generating variates with univariate and multivariate Wallenius' and Fisher's noncentral hypergeometric distributions are developed. Methods for the univariate distributions include: simulation of urn experiments, inversion by binary search, inversion by chop-down search from...

  9. Vita biografica vs. Vita biologica. la questione dell’anthropos in Karl Löwith

    Directory of Open Access Journals (Sweden)

    Gambardella, Fabiana

    2012-12-01

    Full Text Available This work focuses on Karl Löwith’s anthropology. Despite the great number of anthropological studies carried out at the beginning of 20th Century and aimed at describing human nature by means of natural science (biology, ethology, zoology, Löwith elaborates an anthropology based on the concept of biographical life. Man is not a simple living being, he is also an unnatural being that produces himself through the relationship with the other within a shared world.

  10. Den første Karl Gustav-krig 1657-58

    DEFF Research Database (Denmark)

    Olden-Jørgensen, Sebastian

    2008-01-01

    Artiklen diskuterer den første Karl Gustav-krig i forskellige persketiver og konkluderer, at krigen ikke bør opfattes som et dårligt forberedt og uigennemtænkt forsøg på dansk revanche inden for rammerne af en nordisk rivalisering, men snarere som  en velovervejet satsning og et led i den dansk-s...

  11. Karl Menningu (ja iseenese) päästmiseks / Ants Hein

    Index Scriptorium Estoniae

    Hein, Ants, 1952-

    2008-01-01

    Vastuseks Karin Hallas-Murula arvustusele "Maja, mis on sümbol" (Sirp, 2007, 5. X, lk. 13) ja Mait Väljase arvustusele "Iseolemise algus arhitektuuris" (Maja, 2008, nr. 1, lk. 86-87) oma 2007. a. ilmunud raamatust "Maja kui sümbol : Eesti Üliõpilaste Seltsi hoone Tartus" kohta. Georg Hellati ja Karl Menningu osalusest EÜS-i hoone sünniloos. Frank Lloyd Wrightist kui võimalikust eeskujuandjast

  12. "Problem of generations": Origins, content and continuing relevance of Karl Mannheim’s article

    OpenAIRE

    Kuljić Todor

    2007-01-01

    The article presents a brief history of the concept of generations. It focuses on Karl Mannheim’s article "Problems of Generations" (1928), its social origins and theoretical content. Mannheim’s role was crucial in 20th century development of the (new) concept of generation. In order to understand the problem of social (historical) generations and evaluate Mannheim’s position within the concept’s development, several points are discussed in more detail: the history of the concept of "generati...

  13. [Development of child neuropsychiatry at the Karl Marx University of Leipzig].

    Science.gov (United States)

    Gebelt, H

    1978-05-01

    The development of pedoneuropsychiatry at the University of Leipzig is marked by the opening in 1926 of the first "Department of Pedopsychiatric Observation", the establishment of the Clinic of Pedoneuropsychiatry as an independent unit of the Department of Medicine, Karl Marx University, and the setting up in 1976 of a Chair of Pedoneuropsychiatry. Paul Schröder's and R. A. Pfeifer's services to their university are particularly appreciated.

  14. Bringing the economy back in: Hannah Arendt, Karl Marx, and the politics of capitalism

    OpenAIRE

    İnce, Onur Ulaş

    2016-01-01

    This article engages with the question of how to construct modern economic relations as an object of political theorizing by placing Hannah Arendt's and Karl Marx's writings in critical conversation. I contend that the political aspect of capitalism comes into sharpest relief less in relations of economic exploitation than in moments of expropriation that produce and reproduce the conditions of capitalist accumulation. To develop a theoretical handle on expropriation and thereby on the politi...

  15. Tim, Jan Lucas ja Karl Robert - vennad üheks kuuks / Maris Laurits

    Index Scriptorium Estoniae

    Laurits, Maris

    2009-01-01

    Rakvere Teatri suvelavastuse "Vennad Lõvisüdamed" kaks Karli osatäitjat Jan Lucas Videvik ja Tim Leesnurm ning Joonatani osatäitja Karl Robert Saaremäe tegid Loksal Kaldmaa talus ratsasõiduproove. Üllar Saaremäe lavastuse "Vennad Lõvisüdamed" (Astrid Lindgreni samanimelise jutustuse järgi) esietendus on 11. juunil Rakvere teatri taga aias

  16. Development of the Potassium-Argon Laser Experiment (KArLE) Instrument for In Situ Geochronology

    Science.gov (United States)

    Cohen, Barbara A.; Li, Z.-H.; Miller, J. S.; Brinckerhoff, W. B.; Clegg, S. M.; Mahaffy, P. R.; Swindle, T. D.; Wiens, R. C.

    2012-01-01

    Absolute dating of planetary samples is an essential tool to establish the chronology of geological events, including crystallization history, magmatic evolution, and alteration. Traditionally, geochronology has only been accomplishable on samples from dedicated sample return missions or meteorites. The capability for in situ geochronology is highly desired, because it will allow one-way planetary missions to perform dating of large numbers of samples. The success of an in situ geochronology package will not only yield data on absolute ages, but can also complement sample return missions by identifying the most interesting rocks to cache and/or return to Earth. In situ dating instruments have been proposed, but none have yet reached TRL 6 because the required high-resolution isotopic measurements are very challenging. Our team is now addressing this challenge by developing the Potassium (K) - Argon Laser Experiment (KArLE) under the NASA Planetary Instrument Definition and Development Program (PIDDP), building on previous work to develop a K-Ar in situ instrument [1]. KArLE uses a combination of several flight-proven components that enable accurate K-Ar isochron dating of planetary rocks. KArLE will ablate a rock sample, determine the K in the plasma state using laser-induced breakdown spectroscopy (LIBS), measure the liberated Ar using quadrupole mass spectrometry (QMS), and relate the two by the volume of the ablated pit using an optical method such as a vertical scanning interferometer (VSI). Our preliminary work indicates that the KArLE instrument will be capable of determining the age of several kinds of planetary samples to +/-100 Myr, sufficient to address a wide range of geochronology problems in planetary science.

  17. The politics of psychiatry and the vicissitudes of faith circa 1950: Karl Stern's psychiatric novel.

    Science.gov (United States)

    Burston, Daniel

    2015-01-01

    Karl Stern, MD (1906-1975) was the author of The Pillar of Fire (1951) and three nonfiction books on psychiatry, psychoanalysis, and religion. His novel, Through Dooms of Love (1960), written with the assistance of his friend and admirer Graham Greene, covers a number of topics that were to psychiatric theory, treatment, and research at mid-century, and reflects several features of his own personal and professional vicissitudes. © 2015 Wiley Periodicals, Inc.

  18. Some epistemology ́s elements of Social Science by Karl PopperAlguns elementos da Epistemolgia da Ciências Sociais de Karl Popper

    Directory of Open Access Journals (Sweden)

    Julio Cesar Rodrigues Pereira

    2010-12-01

    Full Text Available This article discusses the main elements of the epistemology of human sciences of Karl Popper. It was organized as follows. First, we positioned ourselves in the Popper-Adorno controversy. Then weestablished the parameters of discussion, particularly in regards to the idea of “scientific explanation”. Some elements of Popper’s Theory of Knowledge are then analyzed. The final part discusses thescientific parameters of Social Sciences.Este artigo discute os principais elementos da epistemologia das ciências humanas de Karl Popper. Foi organizado como segue. Em primeiro lugar, nos posionamos sobre a  polêmica Popper-Adorno. Então, nós estabelecemos os parâmetros de discussão, nomeadamente no que respeita a idéia de "explicação científica". A seguir são analisados alguns elementos da Teoria do Conhecimento de Popper. A parte final discute os parâmetros científicos de Ciências Sociais

  19. Impact of Uniform Methods on Interlaboratory Antibody Titration Variability: Antibody Titration and Uniform Methods.

    Science.gov (United States)

    Bachegowda, Lohith S; Cheng, Yan H; Long, Thomas; Shaz, Beth H

    2017-01-01

    -Substantial variability between different antibody titration methods prompted development and introduction of uniform methods in 2008. -To determine whether uniform methods consistently decrease interlaboratory variation in proficiency testing. -Proficiency testing data for antibody titration between 2009 and 2013 were obtained from the College of American Pathologists. Each laboratory was supplied plasma and red cells to determine anti-A and anti-D antibody titers by their standard method: gel or tube by uniform or other methods at different testing phases (immediate spin and/or room temperature [anti-A], and/or anti-human globulin [AHG: anti-A and anti-D]) with different additives. Interlaboratory variations were compared by analyzing the distribution of titer results by method and phase. -A median of 574 and 1100 responses were reported for anti-A and anti-D antibody titers, respectively, during a 5-year period. The 3 most frequent (median) methods performed for anti-A antibody were uniform tube room temperature (147.5; range, 119-159), uniform tube AHG (143.5; range, 134-150), and other tube AHG (97; range, 82-116); for anti-D antibody, the methods were other tube (451; range, 431-465), uniform tube (404; range, 382-462), and uniform gel (137; range, 121-153). Of the larger reported methods, uniform gel AHG phase for anti-A and anti-D antibodies had the most participants with the same result (mode). For anti-A antibody, 0 of 8 (uniform versus other tube room temperature) and 1 of 8 (uniform versus other tube AHG), and for anti-D antibody, 0 of 8 (uniform versus other tube) and 0 of 8 (uniform versus other gel) proficiency tests showed significant titer variability reduction. -Uniform methods harmonize laboratory techniques but rarely reduce interlaboratory titer variance in comparison with other methods.

  20. Twee vroeë reaksies van Gereformeerde kant op Karl Barth

    Directory of Open Access Journals (Sweden)

    B. J. Engelbrecht

    1986-06-01

    Full Text Available In 1919 het die eerste uitgawe van die epogmakende “Romerbrief” van Karl Barth verskyn. Van die tweede druk in 1922 sê hy dat “kein Stein mehr auf dem andem” gelaat is nie. So opspraakwekkend was hierdie boek dat in 1929 die 5de druk van die tweede, radikaal-hersiene uitgawe verskyn het. Intussen het nog ander werke van Barth en selfs oor Barth verskyn. 0ns noem o.a. sy Der Christ in der Gesellschaft (1920; Das Wort Gottes und die Theologie (1924; Vom Christlichen Leben (1926; Auferstehung der Toten (2. Aufl. 1927, sy preke saam met Eduard Thurneysen Komm Schopfer Geist, (Dritt Aufl., 7-9 Tausend(! 1926. Maar 1927 was veral belangrik vanweë die verskyning van Barth se eerste Dogmatiekboek: “Die Christliche Dogmatik im Entwurf. 1 Die Lehre vom Worte Gottes. Prolegomena zur Christlichen Dogmatik” . Voor dié datum het dwarsoor die wêreld, maar ook in Nederland wye reaksie op sy teologie ontstaan. In 1926 skryf Max Strauch sy “Theologie Karl Barth’s”, terwyl Haitjema in Nederland ook in 1926 sy Barth boek die lig laat sien (Prof. dr. Th. L. Haitjema, Karl Barth, Wageningen 1926. Ander Nederlanders wat gereageer het, was drr. A. H. de Hartog, V. Hepp, Ph. Kohnstamm en di. D. Tromp en 0. Noordmans.

  1. [Titration comparative study of TOPINA Tablets in patients with localization related epilepsy: double-blind comparative study by rapid and slow titration methods].

    Science.gov (United States)

    Kaneko, Sunao; Inoue, Yushi; Sasagawa, Mutsuo; Kato, Masaaki

    2012-04-01

    To compare the tolerability and efficacy of two titration methods (rapid and slow titration) for TOPINA Tablets with different dosages and periods of escalation, a double-blind comparative study was conducted in patients with localization-related epilepsy. A total of 183 patients were randomized to either rapid titration (initial dosage 100 mg/day increased by 100-200 mg at weekly intervals) or to slow titration (initial dosage 50 mg/day increased in 50 mg/day increments at weekly intervals). TOPINA Tablets were administered for 12 weeks to the maximum dosage of 400 mg/day. The incident of adverse events leading to treatment interruptions or withdrawals was 18.9% in rapid titration and 14.8% in slow titration, with no statistical significance (p = 0.554). The incident of adverse events and adverse reactions of slow titration was slightly lower than that of rapid titration. The common adverse events and adverse reactions reported in the two titration methods were comparable and were well tolerated. On the other hand, the efficacy of slow titration, percent reduction in seizure rate and responder rate, was comparable with that of rapid titration. In conclusion, there were no significant differences of therapeutic response to TOPINA Tablets between the two titration methods.

  2. Potentiometric titration and equivalent weight of humic acid

    Science.gov (United States)

    Pommer, A.M.; Breger, I.A.

    1960-01-01

    The "acid nature" of humic acid has been controversial for many years. Some investigators claim that humic acid is a true weak acid, while others feel that its behaviour during potentiometric titration can be accounted for by colloidal adsorption of hydrogen ions. The acid character of humic acid has been reinvestigated using newly-derived relationships for the titration of weak acids with strong base. Re-interpreting the potentiometric titration data published by Thiele and Kettner in 1953, it was found that Merck humic acid behaves as a weak polyelectrolytic acid having an equivalent weight of 150, a pKa of 6.8 to 7.0, and a titration exponent of about 4.8. Interdretation of similar data pertaining to the titration of phenol-formaldehyde and pyrogallol-formaldehyde resins, considered to be analogs for humic acid by Thiele and Kettner, leads to the conclusion that it is not possible to differentiate between adsorption and acid-base reaction for these substances. ?? 1960.

  3. Using Fisher information to track stability in multivariate ...

    Science.gov (United States)

    With the current proliferation of data, the proficient use of statistical and mining techniques offer substantial benefits to capture useful information from any dataset. As numerous approaches make use of information theory concepts, here, we discuss how Fisher information (FI) can be applied to sustainability science problems and used in data mining applications by analyzing patterns in data. FI was developed as a measure of information content in data, and it has been adapted to assess order in complex system behaviors. The main advantage of the approach is the ability to collapse multiple variables into an index that can be used to assess stability and track overall trends in a system, including its regimes and regime shifts. Here, we provide a brief overview of FI theory, followed by a simple step-by-step numerical example on how to compute FI. Furthermore, we introduce an open source Python library that can be freely downloaded from GitHub and we use it in a simple case study to evaluate the evolution of FI for the global-mean temperature from 1880 to 2015. Results indicate significant declines in FI starting in 1978, suggesting a possible regime shift. Demonstrate Fisher information as a useful method for assessing patterns in big data.

  4. Early electrophysiological findings in Fisher-Bickerstaff syndrome.

    Science.gov (United States)

    Alberti, M A; Povedano, M; Montero, J; Casasnovas, C

    2017-09-06

    The term Fisher-Bickerstaff syndrome (FBS) has been proposed to describe the clinical spectrum encompassing Miller-Fisher syndrome (MFS) and Bickerstaff brainstem encephalitis. The pathophysiology of FBS and the nature of the underlying neuropathy (demyelinating or axonal) are still subject to debate. This study describes the main findings of an early neurophysiological study on 12 patients diagnosed with FBS. Retrospective evaluation of clinical characteristics and electrophysiological findings of 12 patients with FBS seen in our neurology department within 10 days of disease onset. Follow-up electrophysiological studies were also evaluated, where available. The most frequent electrophysiological finding, present in 5 (42%) patients, was reduced sensory nerve action potential (SNAP) amplitude in one or more nerves. Abnormalities were rarely found in motor neurography, with no signs of demyelination. The cranial nerve exam revealed abnormalities in 3 patients (facial neurography and/or blink reflex test). Three patients showed resolution of SNAP amplitude reduction in serial neurophysiological studies, suggesting the presence of reversible sensory nerve conduction block. Results from cranial MRI scans were normal in all patients. An electrophysiological pattern of sensory axonal neuropathy, with no associated signs of demyelination, is an early finding of FBS. Early neurophysiological evaluation and follow-up are essential for diagnosing patients with FBS. Copyright © 2017 Sociedad Española de Neurología. Publicado por Elsevier España, S.L.U. All rights reserved.

  5. Landscape Influences on Fisher Success: Adaptation Strategies in Closed and Open Access Fisheries in Southern Chile

    Directory of Open Access Journals (Sweden)

    Tracy Van Holt

    2012-03-01

    Full Text Available Determinants of fisher success in southern Chile's loco (Concholepas concholepas fishery are examined by comparing fisher success in exclusive access territories that vary in relationship to tree-plantation development, which can affect shellfish quality. The relative importance of fishers' experience and capture technology (traditional measures of fisher success are evaluated against environmental and geospatial characteristics. While knowledge and technology explained variation in catches, this did not translate into higher prices or profit. Fishers succeeded (gained higher prices for locos and had higher monthly incomes from their management areas when they harvested shellfish from closed (exclusive nearshore management areas where the environmental condition produced high quality locos regardless of their fishing experience, technology, and the geospatial features of management areas. Experienced fishers who worked in management areas near tree plantations that fail to produce resources of sufficient quality shifted to offshore fisheries where their experience counted. Offshore fishers working in the congrio (Genypterus chilensis fishery likely exposed themselves to more risk and benefited from their experience and available technology; environmental condition and geospatial factors played little role in their success (price. Closed management areas provided resources to harvest, but may reduce a fisher's ability to adapt to environmental change because success depends on environmental factors outside of a fisher's control. Fishers were not financially rewarded for their experience or their technology in the loco fishery.

  6. Determination of uranium by direct titration with dipicolinic acid

    International Nuclear Information System (INIS)

    Baumann, E.W.

    1984-01-01

    Direct titration of uranium with dipicolinic acid, in the presence of Arsenazo I, is a simple, precise, and accurate method for uranium determination. The method is particularly attractive because it can be totally automated. Detecting the end point (color change from blue to pink) depends on the concentration range. For the Micro Method (1 to 20 ppM U in the solution titrated), the gradual color change is monitored spectrophotometrically. For the Macro Method (20 to 300 ppM), the end point is determined either visually or spectrophotometrically. The spectrophotometric end point is computed by fitting the titration curve. The relative standard deviation is +-1 to 3% for the Micro Method and +-0.3% for the Macro Method

  7. Two-phase titration of cerium(III) by permanganate

    International Nuclear Information System (INIS)

    Lazarev, A.I.; Lazareva, V.I.; Gerko, V.V.

    1987-01-01

    This paper presents a method for the two-phase titrimetric determination of cerium(III) with permanganate which does not require an expenditure of sugar and preliminary removal of chlorides and nitrates. The interaction of cerium(III) with permanganate at room temperature was studied as a function of the pH, the concentration of pyrophosphate, tetraphenylphosphonium (TPP), permanganate, and extraneous compounds, the rate of titration, and the time of stay of the solution in air before titration. The investigations were conducted according to the following methodology: water, solution of cerium(III) pyrophosphate, and TPP were introduced into an Erlenmeyer flask with a side branch near the bottom for clearer observation of the color of the chloroform phase. The authors established the given pH value, poured the water into a volume of 50 ml, and added chloroform. The result was titrated with permanganate solutions of various concentrations until a violet color appeared in the chloroform phase

  8. Determination of dissolved inorganic species of iodine by spectrophotometric titration

    Energy Technology Data Exchange (ETDEWEB)

    Pesavento, Maria; Profumo, Antonella; Biesuz, Raffaela

    1987-09-01

    A method for determining iodate and iodine (+1) in aqueous solutions is proposed. The assay is similar to a previously described method for the determination of iodide and iodine (O), which were titrated with standard iodate in hydrochloric acid solution. A sample solution made 0.5-1.5 M in hydrochloric acid is titrated with a standard iodide solution and monitored spectrophotometrically at 230 nm. The species involved have strong absorbances that are well differentiated at this wavelength. By combining the two titrations it is possible to resolve any mixture of species of iodine in different oxidation states. The precision of the method (standard deviation) is the same both when determining a single species (IO/sub 3/-,I+,1/sub 2/ or I-) and a mixture, and is equal to 2 x 10/sup -7/ M. Chloride and bromide, even at very high concentrations, do not interfere.

  9. Determination of dissolved inorganic species of iodine by spectrophotometric titration

    International Nuclear Information System (INIS)

    Pesavento, Maria; Profumo, Antonella

    1987-01-01

    A method for determining iodate and iodine (+1) in aqueous solutions is proposed. The assay is similar to a previously described method for the determination of iodide and iodine (O), which were titrated with standard iodate in hydrochloric acid solution. A sample solution made 0.5-1.5 M in hydrochloric acid is titrated with a standard iodide solution and monitored spectrophotometrically at 230 nm. The species involved have strong absorbances that are well differentiated at this wavelength. By combining the two titrations it is possible to resolve any mixture of species of iodine in different oxidation states. The precision of the method (standard deviation) is the same both when determining a single species (IO 3 -,I+,1 2 or I-) and a mixture, and is equal to 2 x 10 -7 M. Chloride and bromide, even at very high concentrations, do not interfere. (author)

  10. Error assessment in recombinant baculovirus titration: evaluation of different methods.

    Science.gov (United States)

    Roldão, António; Oliveira, Rui; Carrondo, Manuel J T; Alves, Paula M

    2009-07-01

    The success of baculovirus/insect cells system in heterologous protein expression depends on the robustness and efficiency of the production workflow. It is essential that process parameters are controlled and include as little variability as possible. The multiplicity of infection (MOI) is the most critical factor since irreproducible MOIs caused by inaccurate estimation of viral titers hinder batch consistency and process optimization. This lack of accuracy is related to intrinsic characteristics of the method such as the inability to distinguish between infectious and non-infectious baculovirus. In this study, several methods for baculovirus titration were compared. The most critical issues identified were the incubation time and cell concentration at the time of infection. These variables influence strongly the accuracy of titers and must be defined for optimal performance of the titration method. Although the standard errors of the methods varied significantly (7-36%), titers were within the same order of magnitude; thus, viral titers can be considered independent of the method of titration. A cost analysis of the baculovirus titration methods used in this study showed that the alamarblue, real time Q-PCR and plaque assays were the most expensive techniques. The remaining methods cost on average 75% less than the former methods. Based on the cost, time and error analysis undertaken in this study, the end-point dilution assay, microculture tetrazolium assay and flow cytometric assay were found to be the techniques that combine all these three main factors better. Nevertheless, it is always recommended to confirm the accuracy of the titration either by comparison with a well characterized baculovirus reference stock or by titration using two different methods and verification of the variability of results.

  11. Identifying alternate pathways for climate change to impact inland recreational fishers

    Science.gov (United States)

    Hunt, Len M.; Fenichel, Eli P.; Fulton, David C.; Mendelsohn, Robert; Smith, Jordan W.; Tunney, Tyler D.; Lynch, Abigail J.; Paukert, Craig P.; Whitney, James E.

    2016-01-01

    Fisheries and human dimensions literature suggests that climate change influences inland recreational fishers in North America through three major pathways. The most widely recognized pathway suggests that climate change impacts habitat and fish populations (e.g., water temperature impacting fish survival) and cascades to impact fishers. Climate change also impacts recreational fishers by influencing environmental conditions that directly affect fishers (e.g., increased temperatures in northern climates resulting in extended open water fishing seasons and increased fishing effort). The final pathway occurs from climate change mitigation and adaptation efforts (e.g., refined energy policies result in higher fuel costs, making distant trips more expensive). To address limitations of past research (e.g., assessing climate change impacts for only one pathway at a time and not accounting for climate variability, extreme weather events, or heterogeneity among fishers), we encourage researchers to refocus their efforts to understand and document climate change impacts to inland fishers.

  12. Exp-function method for solving Fisher's equation

    Energy Technology Data Exchange (ETDEWEB)

    Zhou, X-W [Department of Mathematics, Kunming Teacher' s College, Kunming, Yunnan 650031 (China)], E-mail: km_xwzhou@163.com

    2008-02-15

    There are many methods to solve Fisher's equation, but each method can only lead to a special solution. In this paper, a new method, namely the exp-function method, is employed to solve the Fisher's equation. The obtained result includes all solutions in open literature as special cases, and the generalized solution with some free parameters might imply some fascinating meanings hidden in the Fisher's equation.

  13. The Impact of Money Supply Volatility on the Fisher Effect –A Botswana Empirical Perspective

    OpenAIRE

    Bosupeng, Mpho; Biza-Khupe, Simangaliso

    2015-01-01

    To the extent that these authors have been able to determine, existing literature on the Fisher Effect has only attempted to vary methodological approaches to test for the existence and validity of the Fisher hypothesis. It is the objective of this paper to expand on the literature by determining the degree of influence of money supply changes on the validity and existence of the Fisher Effect. The study examines interest rates and money supply quantities in Botswana from 1989 to 2013 and use...

  14. A Case of Miller Fisher Syndrome, Thromboembolic Disease, and Angioedema: Association or Coincidence?

    OpenAIRE

    Salehi, Nooshin; Choi, Eric D.; Garrison, Roger C.

    2017-01-01

    Patient: Male, 32 Final Diagnosis: Miller Fisher syndrome Symptoms: Ataxia ? headache ? ophthalmoplegia Medication: ? Clinical Procedure: Plasmapheresis Specialty: Neurology Objective: Rare co-existance of disease or pathology Background: Miller Fisher Syndrome is characterized by the clinical triad of ophthalmoplegia, ataxia, and areflexia, and is considered to be a variant of Guillain-Barre Syndrome. Miller Fisher Syndrome is observed in approximately 1?5% of all Guillain-Barre cases in Wes...

  15. Multiple Factors Affect Socioeconomics and Wellbeing of Artisanal Sea Cucumber Fishers

    Science.gov (United States)

    Ngaluafe, Poasi; Foale, Simon J.; Cocks, Nicole; Cullis, Brian R.; Lalavanua, Watisoni

    2016-01-01

    Small-scale fisheries are important to livelihoods and subsistence seafood consumption of millions of fishers. Sea cucumbers are fished worldwide for export to Asia, yet few studies have assessed factors affecting socioeconomics and wellbeing among fishers. We interviewed 476 men and women sea cucumber fishers at multiple villages within multiple locations in Fiji, Kiribati, Tonga and New Caledonia using structured questionnaires. Low rates of subsistence consumption confirmed a primary role of sea cucumbers in income security. Prices of sea cucumbers sold by fishers varied greatly among countries, depending on the species. Gender variation in landing prices could be due to women catching smaller sea cucumbers or because some traders take advantage of them. Dissatisfaction with fishery income was common (44% of fishers), especially for i-Kiribati fishers, male fishers, and fishers experiencing difficulty selling their catch, but was uncorrelated with sale prices. Income dissatisfaction worsened with age. The number of livelihood activities averaged 2.2–2.5 across countries, and varied significantly among locations. Sea cucumbers were often a primary source of income to fishers, especially in Tonga. Other common livelihood activities were fishing other marine resources, copra production in Kiribati, agriculture in Fiji, and salaried jobs in New Caledonia. Fishing other coastal and coral reef resources was the most common fall-back livelihood option if fishers were forced to exit the fishery. Our data highlight large disparities in subsistence consumption, gender-related price equity, and livelihood diversity among parallel artisanal fisheries. Improvement of supply chains in dispersed small-scale fisheries appears as a critical need for enhancing income and wellbeing of fishers. Strong evidence for co-dependence among small-scale fisheries, through fall-back livelihood preferences of fishers, suggests that resource managers must mitigate concomitant effects on

  16. Semisupervised kernel marginal Fisher analysis for face recognition.

    Science.gov (United States)

    Wang, Ziqiang; Sun, Xia; Sun, Lijun; Huang, Yuchun

    2013-01-01

    Dimensionality reduction is a key problem in face recognition due to the high-dimensionality of face image. To effectively cope with this problem, a novel dimensionality reduction algorithm called semisupervised kernel marginal Fisher analysis (SKMFA) for face recognition is proposed in this paper. SKMFA can make use of both labelled and unlabeled samples to learn the projection matrix for nonlinear dimensionality reduction. Meanwhile, it can successfully avoid the singularity problem by not calculating the matrix inverse. In addition, in order to make the nonlinear structure captured by the data-dependent kernel consistent with the intrinsic manifold structure, a manifold adaptive nonparameter kernel is incorporated into the learning process of SKMFA. Experimental results on three face image databases demonstrate the effectiveness of our proposed algorithm.

  17. Ratio index variables or ANCOVA? Fisher's cats revisited.

    Science.gov (United States)

    Tu, Yu-Kang; Law, Graham R; Ellison, George T H; Gilthorpe, Mark S

    2010-01-01

    Over 60 years ago Ronald Fisher demonstrated a number of potential pitfalls with statistical analyses using ratio variables. Nonetheless, these pitfalls are largely overlooked in contemporary clinical and epidemiological research, which routinely uses ratio variables in statistical analyses. This article aims to demonstrate how very different findings can be generated as a result of less than perfect correlations among the data used to generate ratio variables. These imperfect correlations result from measurement error and random biological variation. While the former can often be reduced by improvements in measurement, random biological variation is difficult to estimate and eliminate in observational studies. Moreover, wherever the underlying biological relationships among epidemiological variables are unclear, and hence the choice of statistical model is also unclear, the different findings generated by different analytical strategies can lead to contradictory conclusions. Caution is therefore required when interpreting analyses of ratio variables whenever the underlying biological relationships among the variables involved are unspecified or unclear. (c) 2009 John Wiley & Sons, Ltd.

  18. The Tully-Fisher relation for flat galaxies

    Science.gov (United States)

    Makarov, D. I.; Zaitseva, N. A.; Bizyaev, D. V.

    2018-06-01

    We construct a multiparametric Tully-Fisher (TF) relation for a large sample of edge-on galaxies from the Revised Flat Galaxy Catalog using H I data from the EDD database and parameters from the EGIS catalog. We incorporate a variety of additional parameters including structural parameters of edge-on galaxies in different bandpasses. Besides the rotation curve maximum, only the H I-to-optical luminosity ratio and optical colours play a statistically significant role in the multiparametric TF relation. We are able to decrease the standard deviation of the multiparametric TF relation down to 0.32 mag, which is at the level of best modern samples of galaxies used for studies of the matter motion in the Universe via the TF-relation.

  19. Local Patch Vectors Encoded by Fisher Vectors for Image Classification

    Directory of Open Access Journals (Sweden)

    Shuangshuang Chen

    2018-02-01

    Full Text Available The objective of this work is image classification, whose purpose is to group images into corresponding semantic categories. Four contributions are made as follows: (i For computational simplicity and efficiency, we directly adopt raw image patch vectors as local descriptors encoded by Fisher vector (FV subsequently; (ii For obtaining representative local features within the FV encoding framework, we compare and analyze three typical sampling strategies: random sampling, saliency-based sampling and dense sampling; (iii In order to embed both global and local spatial information into local features, we construct an improved spatial geometry structure which shows good performance; (iv For reducing the storage and CPU costs of high dimensional vectors, we adopt a new feature selection method based on supervised mutual information (MI, which chooses features by an importance sorting algorithm. We report experimental results on dataset STL-10. It shows very promising performance with this simple and efficient framework compared to conventional methods.

  20. Construction and use of an optical semi-automatic titrator employing the technique of reflectance photometry

    International Nuclear Information System (INIS)

    Hwang, Hoon

    2001-01-01

    An optical semi-automatic titrator was constructed employing the technique of the reflectance spectrometry and was tested for the determination of the end points of the acid-base, precipitation, and EDTA titrations. And since the current optical semi-automatic titrator built on the principle of the reflectance spectrometry could be successfully used even for the determination of the end of the end point in the precipitation titration where the solid particles are formed during the titration process, it was found to be feasible that a completely automated optical titrator would be designed and built based on the current findings

  1. A contribuição de Karl Polanyi para a sociologia do desenvolvimento rural The contribution of Karl Polanyi for the rural development sociology

    Directory of Open Access Journals (Sweden)

    Sergio Schneider

    2011-08-01

    Full Text Available O ensaio aborda a importância da redescoberta do pensamento de Karl Polanyi e de sua crítica à "sociedade de mercado" na retomada dos estudos e debates sobre o desenvolvimento (rural. Após uma apresentação geral do quadro teórico e analítico de Polanyi, buscamos utilizar seus conceitos para interpretar a dinâmica da mercantilização dos meios de vida e das formas sociais de trabalho e produção no espaço rural, bem como dos sistemas agroalimentares no capitalismo contemporâneo. Com base nestas proposições, refletimos sobre o papel dos atores sociais e das instituições nos processos de mudança social em geral e os de desenvolvimento rural em particular. Finalizamos, propondo algumas potencialidades dessa abordagem para os estudos sobre desenvolvimento rural no Brasil.The essay deals with the importance of the rediscovery of Karl Polanyi's thinking and of his criticism of the "market society" in resuming (rural development studies and debates. Following an overall presentation of Polanyi's theoretical and analytical framework, we look for using his concepts to interpret the commoditization dynamics of the rural livelihoods and the social forms of labor and production in the rural space, as well as the commoditization of the agri-food systems in the contemporary capitalism. Based on these statements, we reflect about the role of social actors and institutions in the processes of social change at large and of rural development in particular. And, finally, we propose some potentialities of this approach for the rural development studies in Brazil.

  2. 77 FR 47818 - Proposed Information Collection; Comment Request; Socioeconomics of Commercial Fishers and for...

    Science.gov (United States)

    2012-08-10

    ... DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration Proposed Information Collection; Comment Request; Socioeconomics of Commercial Fishers and for Hire Diving and Fishing Operations... [[Page 47819

  3. Quantum Fisher information of the Greenberg-Horne-Zeilinger state in decoherence channels

    International Nuclear Information System (INIS)

    Ma Jian; Huang Yixiao; Wang Xiaoguang; Sun, C. P.

    2011-01-01

    Quantum Fisher information of a parameter characterizes the sensitivity of the state with respect to changes of the parameter. In this article, we study the quantum Fisher information of a state with respect to SU(2) rotations under three decoherence channels: the amplitude-damping, phase-damping, and depolarizing channels. The initial state is chosen to be a Greenberg-Horne-Zeilinger state of which the phase sensitivity can achieve the Heisenberg limit. By using the Kraus operator representation, the quantum Fisher information is obtained analytically. We observe the decay and sudden change of the quantum Fisher information in all three channels.

  4. Quantum Fisher information of the Greenberg-Horne-Zeilinger state in decoherence channels

    Energy Technology Data Exchange (ETDEWEB)

    Ma Jian; Huang Yixiao; Wang Xiaoguang [Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou 310027 (China); Sun, C. P. [Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China)

    2011-08-15

    Quantum Fisher information of a parameter characterizes the sensitivity of the state with respect to changes of the parameter. In this article, we study the quantum Fisher information of a state with respect to SU(2) rotations under three decoherence channels: the amplitude-damping, phase-damping, and depolarizing channels. The initial state is chosen to be a Greenberg-Horne-Zeilinger state of which the phase sensitivity can achieve the Heisenberg limit. By using the Kraus operator representation, the quantum Fisher information is obtained analytically. We observe the decay and sudden change of the quantum Fisher information in all three channels.

  5. Clinical Effectiveness and Dose Titration in Pediatric Practice

    Directory of Open Access Journals (Sweden)

    Yu.V. Marushko

    2016-02-01

    Full Text Available The paper is devoted to the questions of usage of one of the popular antipyretic and anesthetic drug in pediatric practice — ibuprofen. In the article there are generalized literature data and own experience in ibuprofen dose titration in single dose 5 and 10 mg/kg depending on clinical situation.

  6. Uranium coulometric titration. Application to the determination of traces

    International Nuclear Information System (INIS)

    Bergey, C.

    After a description of the device, the means developed to improve the titration method are presented. Coulometry enables to determine U with an accuracy of 0,1% in samples of only several tenths of a milligram. This method is rapid but not intended for routine analysis [fr

  7. Isothermal Titration Calorimetry Can Provide Critical Thinking Opportunities

    Science.gov (United States)

    Moore, Dale E.; Goode, David R.; Seney, Caryn S.; Boatwright, Jennifer M.

    2016-01-01

    College chemistry faculties might not have considered including isothermal titration calorimetry (ITC) in their majors' curriculum because experimental data from this instrumental method are often analyzed via automation (software). However, the software-based data analysis can be replaced with a spreadsheet-based analysis that is readily…

  8. Electroconvulsive therapy stimulus titration: Not all it seems.

    Science.gov (United States)

    Rosenman, Stephen J

    2018-05-01

    To examine the provenance and implications of seizure threshold titration in electroconvulsive therapy. Titration of seizure threshold has become a virtual standard for electroconvulsive therapy. It is justified as individualisation and optimisation of the balance between efficacy and unwanted effects. Present day threshold estimation is significantly different from the 1960 studies of Cronholm and Ottosson that are its usual justification. The present form of threshold estimation is unstable and too uncertain for valid optimisation or individualisation of dose. Threshold stimulation (lowest dose that produces a seizure) has proven therapeutically ineffective, and the multiples applied to threshold to attain efficacy have never been properly investigated or standardised. The therapeutic outcomes of threshold estimation (or its multiples) have not been separated from simple dose effects. Threshold estimation does not optimise dose due to its own uncertainties and the different short-term and long-term cognitive and memory effects. Potential harms of titration have not been examined. Seizure threshold titration in electroconvulsive therapy is not a proven technique of dose optimisation. It is widely held and practiced; its benefit and harmlessness assumed but unproven. It is a prematurely settled answer to an unsettled question that discourages further enquiry. It is an example of how practices, assumed scientific, enter medicine by obscure paths.

  9. Acid/base titrations of simulated PWR crevice environments

    International Nuclear Information System (INIS)

    Pang, J.; Macdonald, D.D.; Millett, P.J.

    1993-01-01

    The construction and operation of a titration system that is capable of exploring the acid/base properties of aqueous systems at temperatures solution is measured using YSZ sensors of the type Hg/HgO/ZrO 2 (Y 2 O 3 )/Solution in conjunction with a suitable reference electrode. The use of the system for measuring the pH of the titrated solutions (NaOH/H 2 SO 4 ) is discussed, and we show that the YSZ pH sensor is capable of consistent and precise pH measurements at elevated temperature (275-325 degrees C) and pressures (100-150 bars). However, the accuracy of the measured pH depends critically on the performance of the reference electrode. In the present work, we ensure the viability of the reference electrode. In the present work, we ensure the viability of the reference electrode by periodically calibrating it in situ using the pH sensor and a standard solution of known pH versus temperature characteristics. The titration data obtained in this study are compared with predictions from EPRI's MULTEQ code, and are found to be in satisfactory agreement in the alkaline pH region. Observed discrepancies in the acidic pH region between the two sets of data are attributed to corrosion of the alloys used to fabricate the titration system

  10. A dipstick sensor for coulometric acid-base titrations

    NARCIS (Netherlands)

    Olthuis, Wouter; van der Schoot, B.H.; Chavez, F.; Bergveld, Piet

    1989-01-01

    By performing an acid-base titration by coulometric generation of OH− or H+ ions at an inert electrode in close proximity to the pH-sensitive gate of an ISFET, it is possible to determine the acid or base concentration of a solution using the ISFET as an indicator device for the equivalence point in

  11. Using Spreadsheets to Produce Acid-Base Titration Curves.

    Science.gov (United States)

    Cawley, Martin James; Parkinson, John

    1995-01-01

    Describes two spreadsheets for producing acid-base titration curves, one uses relatively simple cell formulae that can be written into the spreadsheet by inexperienced students and the second uses more complex formulae that are best written by the teacher. (JRH)

  12. Developing and Demonstrating an Augmented Reality Colorimetric Titration Tool

    Science.gov (United States)

    Tee, Nicholas Yee Kwang; Gan, Hong Seng; Li, Jonathan; Cheong, Brandon Huey-Ping; Tan, Han Yen; Liew, Oi Wah; Ng, Tuck Wah

    2018-01-01

    The handling of chemicals in the laboratory presents a challenge in instructing large class sizes and when students are relatively new to the laboratory environment. In this work, we describe and demonstrate an augmented reality colorimetric titration tool that operates out of the smartphone or tablet of students. It allows multiple students to…

  13. Automation of potentiometric titration with a personal computer using ...

    African Journals Online (AJOL)

    sampling was designed and tested for automation of potentiometric titrations with personal ... automation permits us to carry out new types of experiments, such as those requiring ... have proved to be very useful in routine tasks but not in research, due to their ... This is done by a simple delay sub-routine in data acquisition.

  14. A General Simulator for Acid-Base Titrations

    Science.gov (United States)

    de Levie, Robert

    1999-07-01

    General formal expressions are provided to facilitate the automatic computer calculation of acid-base titration curves of arbitrary mixtures of acids, bases, and salts, without and with activity corrections based on the Davies equation. Explicit relations are also given for the buffer strength of mixtures of acids, bases, and salts.

  15. Evaluation of modified boehm titration methods for use with biochars.

    Science.gov (United States)

    Fidel, Rivka B; Laird, David A; Thompson, Michael L

    2013-11-01

    The Boehm titration, originally developed to quantify organic functional groups of carbon blacks and activated carbons in discrete pK ranges, has received growing attention for analyzing biochar. However, properties that distinguish biochar from carbon black and activated carbon, including greater carbon solubility and higher ash content, may render the original Boehm titration method unreliable for use with biochars. Here we use seven biochars and one reference carbon black to evaluate three Boehm titration methods that use (i) acidification followed by sparging (sparge method), (ii) centrifugation after treatment with BaCl (barium method), and (iii) a solid-phase extraction cartridge followed by acidification and sparging (cartridge method) to remove carbonates and dissolved organic compounds (DOC) from the Boehm extracts before titration. Our results for the various combinations of Boehm reactants and methods indicate that no one method was free of bias for all three Boehm reactants and that the cartridge method showed evidence of bias for all pK ranges. By process of elimination, we found that a combination of the sparge method for quantifying functional groups in the lowest pK range (∼5 to 6.4), and the barium method for quantifying functional groups in the higher pK ranges (∼6.4 to 10.3 and ∼10.3 to 13) to be free of evidence for bias. We caution, however, that further testing is needed and that all Boehm titration results for biochars should be considered suspect unless efforts were undertaken to remove ash and prevent interference from DOC. Copyright © by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Inc.

  16. Karl Poggensee - A widely unknown German rocket pioneer - The early years 1930-1934 - A chronology

    Science.gov (United States)

    Rohrwild, Karlheinz

    2017-09-01

    The rediscovered estate of Karl Poggensee allows to reproduce chronologically his rocket tests of the period 1930-1934 almost completely for the first time. Thrilled by the movie ;The Woman in the Moon; for the idea of space travel, he started as a student of Hinderburg-Polytechnikum (IAO), Oldenburg, to build his first solid-fuel rocket, producing his own propellant charges. Being a coming electrical engineer his main goal was not set up new record heights, but to provide his rockets with automatic measuring instruments, camera and parachute release systems. The optimization of this sequence was his main focus.

  17. 3rd Karl Schwarzschild Meeting - Gravity and the Gauge/Gravity Correspondence

    Science.gov (United States)

    Nicolini, Piero; Kaminski, Matthias; Mureika, Jonas; Bleicher, Marcus

    2018-01-01

    The Karl Schwarzschild Meeting 2017 (KSM2017) has been the third instalment of the conference dedicated to the great Frankfurter scientist, who derived the first black hole solution of Einstein's equations about 100 years ago. The event has been a 5 day meeting in the field of black holes, AdS/CFT correspondence and gravitational physics. Like the two previous instalments, the conference continued to attract a stellar ensemble of participants from the world's most renowned institutions. The core of the meeting has been a series of invited talks from eminent experts (keynote speakers) as well as the presence of plenary research talks by students and junior speakers.

  18. Determination of water in nuclear materials by means of the Karl Fischer method

    International Nuclear Information System (INIS)

    Pereira, W.; Rocha, S.M.R.; Atalla, L.T.; Abrao, A.

    1987-06-01

    Karl Fischer Method was adapted for water determination in uranium coumpounds and substances of nuclear interest, by using a comercial equipment. The experimental conditions for the analysis of U 3 O 8 , UO 3 , UO 2 , UF 4 KFnHF and (NH 4 ) 4 UO 2 (CO 3 ) 3 were established. The influence of the agitation and contact time between sample and solvent, of the sample weight, of the reaction end point determination and of the sample granulometry on the precision and accuracy of results was also studied. (Author) [pt

  19. Karl Polanyi et les monnaies modernes : un réexamen

    OpenAIRE

    Blanc , Jérôme

    2006-01-01

    Karl Polanyi a établi une célèbre distinction entre "all purpose money", caractéristiques des sociétés modernes, et "special purpose money", caractéristiques des sociétés anciennes. C'est la conception polanyienne des monnaies modernes qui est critiquée dans ce texte : non seulement elle conduit à considérer que les sociétés modernes ne connaissent pas de "special purpose money", mais en plus elle ne permet pas de renouveler la conception courante de la monnaie (sous-entendu moderne) qui en f...

  20. Dynamic occupancy modelling reveals a hierarchy of competition among fishers, grey foxes and ringtails.

    Science.gov (United States)

    Green, David S; Matthews, Sean M; Swiers, Robert C; Callas, Richard L; Scott Yaeger, J; Farber, Stuart L; Schwartz, Michael K; Powell, Roger A

    2018-05-01

    Determining how species coexist is critical for understanding functional diversity, niche partitioning and interspecific interactions. Identifying the direct and indirect interactions among sympatric carnivores that enable their coexistence is particularly important to elucidate because they are integral for maintaining ecosystem function. We studied the effects of removing nine fishers (Pekania pennanti) on their population dynamics and used this perturbation to elucidate the interspecific interactions among fishers, grey foxes (Urocyon cinereoargenteus) and ringtails (Bassariscus astutus). Grey foxes (family: Canidae) are likely to compete with fishers due to their similar body sizes and dietary overlap, and ringtails (family: Procyonidae), like fishers, are semi-arboreal species of conservation concern. We used spatial capture-recapture to investigate fisher population numbers and dynamic occupancy models that incorporated interspecific interactions to investigate the effects members of these species had on the colonization and persistence of each other's site occupancy. The fisher population showed no change in density for up to 3 years following the removals of fishers for translocations. In contrast, fisher site occupancy decreased in the years immediately following the translocations. During this same time period, site occupancy by grey foxes increased and remained elevated through the end of the study. We found a complicated hierarchy among fishers, foxes and ringtails. Fishers affected grey fox site persistence negatively but had a positive effect on their colonization. Foxes had a positive effect on ringtail site colonization. Thus, fishers were the dominant small carnivore where present and negatively affected foxes directly and ringtails indirectly. Coexistence among the small carnivores we studied appears to reflect dynamic spatial partitioning. Conservation and management efforts should investigate how intraguild interactions may influence the

  1. Determination of the water content in tetra-ammonium uranyl tricarbonate by the Karl Fischer reagent method

    International Nuclear Information System (INIS)

    Sisti, C.; Grigoletto, T.

    1990-08-01

    Two methods are compared for the determination of water content in tetra-ammonium uranyl tricarbonate by the Karl Fischer reagent method. In the first method it is Known that the carbonate reacts stoichiometrically with the iodine content of the Karl Fischer reagent in the same way it reacts with the water (mole of apparent H 2 O per mole of carbonate is produced). In this case, the carbonate content in the sample is determined and a suitable correction is applied to take into account the apparent water results. In the second method it is performed an extraction of the moisture by adding methanol to the sample in an independent flask. After the decantation, an aliquot of the clear supernatant methanol is taken for the determination of water content by the Karl Fischer reagent method. (author) [pt

  2. Update on Development of the Potassium-Argon Laser Experiment (KArLE) Instrument for In Situ Geochronology

    Science.gov (United States)

    Cohen, Barbara A.; Li, Z.-H.; Miller, J. S.; Brinckerhoff, W. B.; Clegg, S. M.; Mahaffy, P. R.; Swindle, T. D.; Wiens, R. C.

    2013-01-01

    Absolute dating of planetary samples is an essential tool to establish the chronology of geological events, including crystallization history, magmatic evolution, and alteration. We are addressing this challenge by developing the Potassium (K) -- Argon Laser Experiment (KArLE), building on previous work to develop a K-Ar in situ instrument. KArLE ablates a rock sample, determines the K in the plasma state using laser-induced breakdown spectroscopy (LIBS), measures the liberated Ar using quadrupole mass spectrometry (QMS), and relates the two by the volume of the ablated pit using laser confocal microscopy (LCM). Our goal is for the KArLE instrument to be capable of determining the age of several kinds of planetary samples to address a wide range of geochronolgy problems in planetary science.

  3. When acid-base titrations are carried out in unusual conditions

    Directory of Open Access Journals (Sweden)

    Domenico De Marco

    2012-12-01

    Full Text Available Uncommon aspects in acid-base titrations are presented, which occur in titrations between both mono- and/or poly-functional acid and bases but are rarely introduced in ordinary analytical chemistry courses.

  4. Keim, Karl-Dieter, Das Fenster zum Raum : Traktat über die Erforschung sozialräumlicher Transformation / [rezensiert von] Helmut Klüter

    OpenAIRE

    Klüter, Helmut

    2009-01-01

    Rezensiertes Werk: Keim, Karl-Dieter: Das Fenster zum Raum : Traktat über die Erforschung sozialräumlicher Transformation / Karl-Dieter Keim. - Opladen : Leske + Budrich, 2003. - 171 S. : graph. Darst. - (Lehrtexte : Sozialwissenschaften) ISBN 3-8100-4050-9

  5. Travelling Solitary Wave Solutions for Generalized Time-delayed Burgers-Fisher Equation

    International Nuclear Information System (INIS)

    Deng Xijun; Han Libo; Li Xi

    2009-01-01

    In this paper, travelling wave solutions for the generalized time-delayed Burgers-Fisher equation are studied. By using the first-integral method, which is based on the ring theory of commutative algebra, we obtain a class of travelling solitary wave solutions for the generalized time-delayed Burgers-Fisher equation. A minor error in the previous article is clarified. (general)

  6. Changes in the structural and functional characteristics of fisher (Pekania pennanti) rest structures over time

    Science.gov (United States)

    Bill Zielinski; Fredrick V. Schlexer

    2015-01-01

    Resting habitat used by fishers (Pekania pennanti) has been relatively well studied but information on the persistence of their resting structures over time is unknown. We selected for reexamination 73 of 195 resting structures used by by fishers in northwestern California and compared their condition on the date they were found with their...

  7. Using forest inventory data to assess fisher resting habitat suitability in California.

    Science.gov (United States)

    William J. Zielinski; Richard L. Truex; Jeffrey R. Dunk; Tom Gaman

    2006-01-01

    The fisher (Martes pennanti) is a forest-dwelling carnivore whose current distribution and association with late-seral forest conditions make it vulnerable to stand-altering human activities or natural disturbances. Fishers select a variety of structures for daily resting bouts. These habitat elements, together with foraging and reproductive (denning) habitat,...

  8. Fisher Information, Entropy, and the Second and Third Laws of Thermodynamics

    Science.gov (United States)

    We propose Fisher Information as a new calculable thermodynamic property that can be shown to follow the Second and the Third Laws of Thermodynamics. Fisher Information is, however, qualitatively different from entropy and potentially possessing a great deal more structure. Hence...

  9. Socio-economic activities of fisher folk in Niger Delta, Nigeria ...

    African Journals Online (AJOL)

    This study examined the socio-economic activities and potentials of rural fisher folk in Niger Delta, Nigeria. One thousand and two hundred (1,200) structured questionnaires were administered to fisher folks in one hundred (100) fishing communities, and only one thousand (1000) were retrieved. The questionnaires dealt ...

  10. 77 FR 67396 - Importer of Controlled Substances; Notice of Application, Fisher Clinical Services, Inc.

    Science.gov (United States)

    2012-11-09

    ... DEPARTMENT OF JUSTICE Drug Enforcement Administration Importer of Controlled Substances; Notice of Application, Fisher Clinical Services, Inc. Pursuant to Title 21 Code of Federal Regulations 1301.34(a), this is notice that on August 20, 2012, Fisher Clinical Services, Inc., 7554 Schantz Road, [[Page 67397...

  11. 77 FR 60143 - Importer of Controlled Substances; Notice of Application; Fisher Clinical Services, Inc.

    Science.gov (United States)

    2012-10-02

    ... DEPARTMENT OF JUSTICE Drug Enforcement Administration Importer of Controlled Substances; Notice of Application; Fisher Clinical Services, Inc. Pursuant to Title 21 Code of Federal Regulations 1301.34(a), this is notice that on July 18, 2012, Fisher Clinical Services, Inc., 7554 Schantz Road, Allentown...

  12. Quantum Fisher information for a qubit system placed inside a dissipative cavity

    International Nuclear Information System (INIS)

    Berrada, K.; Abdel-Khalek, S.; Obada, A.-S.F.

    2012-01-01

    We study the time evolution of the quantum Fisher information of a system whose the dynamics is described by the phase-damped model. We discuss the correlation between the Fisher information and entanglement dynamics of a qubit and single-mode quantized field in a coherent state inside phase-damped cavity. Analytic results under certain parametric conditions are obtained, by means of which we analyze the influence of dissipation on the negativity and quantum Fisher information for different values of the estimator parameter. An interesting monotonic relation between the Fisher information and nonlocal correlation behavior is observed during the time evolution. -- Highlights: ► Relation between the Fisher information and nonlocal correlation dynamics. ► Definition of quantum Fisher information for the atomic density operator. ► Investigation of Fisher information and negativity for the phase-damped model. ► Analytic solution of the master equation for the atom-field system in cavity field. ► Quantum Fisher information may be helpful in quantum information tasks.

  13. Here today, here tomorrow: Managing forests for fisher habitat in the Northern Rockies

    Science.gov (United States)

    Sue Miller; Michael Schwartz; Lucretia E. Olson

    2016-01-01

    The fisher is a unique member of the weasel family and a sensitive species in the northern Rockies. They were almost extirpated by trapping in the early twentieth century, but these animals (a mix between a native and introduced population) now inhabit a swath of mesic coniferous forests in Idaho and Montana. Forest managers need information on fisher distribution and...

  14. 77 FR 72409 - Importer of Controlled Substances; Notice of Application; Fisher Clinical Services, Inc.

    Science.gov (United States)

    2012-12-05

    ... DEPARTMENT OF JUSTICE Drug Enforcement Administration Importer of Controlled Substances; Notice of Application; Fisher Clinical Services, Inc. Pursuant to Title 21 Code of Federal Regulations 1301.34 (a), this is notice that on October 16, 2012, Fisher Clinical Services, Inc., 7554 Schantz Road, Allentown...

  15. 78 FR 59064 - Importer of Controlled Substances; Notice of Application; Fisher Clinical Services, Inc.

    Science.gov (United States)

    2013-09-25

    ... DEPARTMENT OF JUSTICE Drug Enforcement Administration Importer of Controlled Substances; Notice of Application; Fisher Clinical Services, Inc. Pursuant to Title 21 Code of Federal Regulations (CFR) 1301.34 (a), this is notice that on June 21, 2013, Fisher Clinical Services, Inc., 7554 Schantz Road, Allentown...

  16. Survival of fishers in the southern Sierra Nevada region of California

    Science.gov (United States)

    Richard A. Sweitzer; Craig M. Thompson; Rebecca E. Green; Reginald H. Barrett; Kathryn L. Purcell

    2015-01-01

    Fishers in the western United States were recently proposed for listing under the U.S. Endangered Species Act because of concerns for loss of suitable habitat and evidence of a diversity of mortality risks that reduce survival. One of 2 remnant populations of fishers in California is in the southern Sierra Nevada region, where we studied them at 2 research sites in the...

  17. The asymptotic and exact Fisher information matrices of a vector ARMA process

    NARCIS (Netherlands)

    Klein, A.; Melard, G.; Saidi, A.

    2008-01-01

    The exact Fisher information matrix of a Gaussian vector autoregressive-moving average (VARMA) process has been considered for a time series of length N in relation to the exact maximum likelihood estimation method. In this paper it is shown that the Gaussian exact Fisher information matrix

  18. Historical perspective on the reintroduction of the fisher and American marten in Michigan and Wisconsin

    Science.gov (United States)

    Bronwyn W. Williams; Jonathan H. Gilbert; Patrick A. Zollner

    2007-01-01

    Management of mustelid species such as fishers and martens requires an understanding of the history of local populations. This is particularly true in areas where populations were extirpated and restored through reintroduction efforts. During the late 19th and 20th centuries, fishers (Martes pennanti) and American martens (Martes americana...

  19. Evaluating the sustainability of a regional system using Fisher information in the San Luis Basin, Colorado

    Science.gov (United States)

    This paper describes the theory, data, and methodology necessary for using Fisher information to assess the sustainability of the San Luis Basin (SLB) regional system over time. Fisher information was originally developed as a measure of the information content in data and is an ...

  20. Management decision making for fisher populations informed by occupancy modeling

    Science.gov (United States)

    Fuller, Angela K.; Linden, Daniel W.; Royle, J. Andrew

    2016-01-01

    Harvest data are often used by wildlife managers when setting harvest regulations for species because the data are regularly collected and do not require implementation of logistically and financially challenging studies to obtain the data. However, when harvest data are not available because an area had not previously supported a harvest season, alternative approaches are required to help inform management decision making. When distribution or density data are required across large areas, occupancy modeling is a useful approach, and under certain conditions, can be used as a surrogate for density. We collaborated with the New York State Department of Environmental Conservation (NYSDEC) to conduct a camera trapping study across a 70,096-km2 region of southern New York in areas that were currently open to fisher (Pekania [Martes] pennanti) harvest and those that had been closed to harvest for approximately 65 years. We used detection–nondetection data at 826 sites to model occupancy as a function of site-level landscape characteristics while accounting for sampling variation. Fisher occupancy was influenced positively by the proportion of conifer and mixed-wood forest within a 15-km2 grid cell and negatively associated with road density and the proportion of agriculture. Model-averaged predictions indicated high occupancy probabilities (>0.90) when road densities were low (0.50). Predicted occupancy ranged 0.41–0.67 in wildlife management units (WMUs) currently open to trapping, which could be used to guide a minimum occupancy threshold for opening new areas to trapping seasons. There were 5 WMUs that had been closed to trapping but had an average predicted occupancy of 0.52 (0.07 SE), and above the threshold of 0.41. These areas are currently under consideration by NYSDEC for opening a conservative harvest season. We demonstrate the use of occupancy modeling as an aid to management decision making when harvest-related data are unavailable and when budgetary

  1. Acidity titration curves - a versatile tool for the characterisation of acidic mine waste water

    International Nuclear Information System (INIS)

    Fyson, A.

    2000-01-01

    Acidity titrations with NaOH are valuable tools for characterisation of acidic mine waters. - Titrations can be used to estimate metal concentrations. - Titrations can be carried out in the field, minimising changes in water chemistry due to sample handling time and procedure. (orig.)

  2. Colloid Titration--A Rapid Method for the Determination of Charged Colloid.

    Science.gov (United States)

    Ueno, Keihei; Kina, Ken'yu

    1985-01-01

    "Colloid titration" is a volumetric method for determining charged polyelectrolytes in aqueous solutions. The principle of colloid titration, reagents used in the procedure, methods of endpoint detection, preparation of reagent solutions, general procedure used, results obtained, and pH profile of colloid titration are considered. (JN)

  3. The Acid-Base Titration of a Very Weak Acid: Boric Acid

    Science.gov (United States)

    Celeste, M.; Azevedo, C.; Cavaleiro, Ana M. V.

    2012-01-01

    A laboratory experiment based on the titration of boric acid with strong base in the presence of d-mannitol is described. Boric acid is a very weak acid and direct titration with NaOH is not possible. An auxiliary reagent that contributes to the release of protons in a known stoichiometry facilitates the acid-base titration. Students obtain the…

  4. Thermometric titration of cadmium with sodium diethyldithiocarbamate, with oxidation by hydrogen peroxide as indicator reaction.

    Science.gov (United States)

    Hattori, T; Yoshida, H

    1987-08-01

    A new method of end-point indication is described for thermometric titration of cadmium with sodium diethyldithiocarbamate (DDTC). It is based on the redox reaction between hydrogen peroxide added to the system before titration, and the first excess of DDTC. Amounts of cadmium in the range 10-50 mumoles are titrated within 1% error.

  5. Fisher information and asymptotic normality in system identification for quantum Markov chains

    International Nuclear Information System (INIS)

    Guta, Madalin

    2011-01-01

    This paper deals with the problem of estimating the coupling constant θ of a mixing quantum Markov chain. For a repeated measurement on the chain's output we show that the outcomes' time average has an asymptotically normal (Gaussian) distribution, and we give the explicit expressions of its mean and variance. In particular, we obtain a simple estimator of θ whose classical Fisher information can be optimized over different choices of measured observables. We then show that the quantum state of the output together with the system is itself asymptotically Gaussian and compute its quantum Fisher information, which sets an absolute bound to the estimation error. The classical and quantum Fisher information are compared in a simple example. In the vicinity of θ=0 we find that the quantum Fisher information has a quadratic rather than linear scaling in output size, and asymptotically the Fisher information is localized in the system, while the output is independent of the parameter.

  6. The psychology of thinking, animal psychology, and the young Karl Popper.

    Science.gov (United States)

    Ter Hark, Michel

    2004-01-01

    In the 1920s, Karl Popper wrote two large manuscripts on psychology that he never published. In his autobiography, Unended Quest, he attempts to reduce the importance of his work in psychology as much as possible, and in his philosophical work he is an antipsychologist. However, in this article, it is argued that Popper's early psychology has been pivotally important for the development of his philosophy. In particular, it is shown that Popper's views on psychology underwent a radical shift, one that paved the way for his characteristic deductive stance in philosophy. Popper's views shifted from an inductive and associationistic psychology toward a noninductive psychology of problem solving. Tracing the historical background of Popper's early work reveals how he integrated various parts of the psychology of Karl Groos into his analysis of the childish phenomenon of dogmatic thinking and how he shortly after appropriated various elements of the animal psychology of Hans Volkelt and Herbert Jennings in his biological approach to (dogmatic) thinking. In the monumental works of Otto Selz, however, Popper finally found the roots of a noninductive and biological approach to the growth of individual and scientific knowledge. Copyright 2004 Wiley Periodicals, Inc.

  7. Karl Marx and Liberation Theology: Dialectical Materialism and Christian Spirituality in, against, and beyond Contemporary Capitalism

    Directory of Open Access Journals (Sweden)

    Peter McLaren

    2018-05-01

    Full Text Available This paper explores convergences and discrepancies between liberation theology and the works of Karl Marx through the dialogue between one of the key contemporary proponents of liberation theology, Peter McLaren, and the agnostic scholar in critical pedagogy, Petar Jandrić. The paper briefly outlines liberation theology and its main convergences with the works of Karl Marx. Exposing striking similarities between the two traditions in denouncing the false God of money, it explores differences in their views towards individualism and collectivism. It rejects shallow rhetorical homologies between Marx and the Bible often found in liberation theology, and suggests a change of focus from seeking a formal or Cartesian logical consistency between Marxism and Christianity to exploring their dialectical consistency. Looking at Marxist and Christian approaches to morality, it outlines close links between historical materialism and questions of value. It concludes that the shared eschaton of Marxism and the Christianity gives meaning to human history and an opportunity to change it.

  8. Low Dimensional Representation of Fisher Vectors for Microscopy Image Classification.

    Science.gov (United States)

    Song, Yang; Li, Qing; Huang, Heng; Feng, Dagan; Chen, Mei; Cai, Weidong

    2017-08-01

    Microscopy image classification is important in various biomedical applications, such as cancer subtype identification, and protein localization for high content screening. To achieve automated and effective microscopy image classification, the representative and discriminative capability of image feature descriptors is essential. To this end, in this paper, we propose a new feature representation algorithm to facilitate automated microscopy image classification. In particular, we incorporate Fisher vector (FV) encoding with multiple types of local features that are handcrafted or learned, and we design a separation-guided dimension reduction method to reduce the descriptor dimension while increasing its discriminative capability. Our method is evaluated on four publicly available microscopy image data sets of different imaging types and applications, including the UCSB breast cancer data set, MICCAI 2015 CBTC challenge data set, and IICBU malignant lymphoma, and RNAi data sets. Our experimental results demonstrate the advantage of the proposed low-dimensional FV representation, showing consistent performance improvement over the existing state of the art and the commonly used dimension reduction techniques.

  9. Astronaut Anna Fisher Suits Up for NBS Training

    Science.gov (United States)

    1980-01-01

    The Hubble Space Telescope (HST) is a cooperative program of the European Space Agency (ESA) and the National Aeronautical and Space Administration (NASA) to operate a long-lived space-based observatory. It was the flagship mission of NASA's Great Observatories program. The HST program began as an astronomical dream in the 1940s. During the 1970s and 1980s, the HST was finally designed and built becoming operational in the 1990s. The HST was deployed into a low-Earth orbit on April 25, 1990 from the cargo bay of the Space Shuttle Discovery (STS-31). The design of the HST took into consideration its length of service and the necessity of repairs and equipment replacement by making the body modular. In doing so, subsequent shuttle missions could recover the HST, replace faulty or obsolete parts and be re-released. Marshall Space Flight Center's (MSFC's) Neutral Buoyancy Simulator (NBS) served as the test center for shuttle astronauts training for Hubble related missions. Shown is astronaut Anna Fisher suiting up for training on a mockup of a modular section of the HST for an axial scientific instrument change out.

  10. Astronaut Anna Fisher Suiting Up For NBS Training

    Science.gov (United States)

    1980-01-01

    The Hubble Space Telescope (HST) is a cooperative program of the European Space Agency (ESA) and the National Aeronautical and Space Administration (NASA) to operate a long-lived space-based observatory. It was the flagship mission of NASA's Great Observatories program. The HST program began as an astronomical dream in the 1940s. During the 1970s and 1980s, the HST was finally designed and built becoming operational in the 1990s. The HST was deployed into a low-Earth orbit on April 25, 1990 from the cargo bay of the Space Shuttle Discovery (STS-31). The design of the HST took into consideration its length of service and the necessity of repairs and equipment replacement by making the body modular. In doing so, subsequent shuttle missions could recover the HST, replace faulty or obsolete parts and be re-released. Marshall Space Flight Center's (MSFC's) Neutral Buoyancy Simulator (NBS) served as the test center for shuttle astronauts training for Hubble related missions. Shown is astronaut Anna Fisher suiting up for training on a mockup of a modular section of the HST for an axial scientific instrument change out.

  11. Astronaut Anna Fisher Suited Up For NBS Training

    Science.gov (United States)

    1980-01-01

    The Hubble Space Telescope (HST) is a cooperative program of the European Space Agency (ESA) and the National Aeronautical and Space Administration (NASA) to operate a long-lived space-based observatory. It was the flagship mission of NASA's Great Observatories program. The HST program began as an astronomical dream in the 1940s. During the 1970s and 1980s, the HST was finally designed and built becoming operational in the 1990s. The HST was deployed into a low-Earth orbit on April 25, 1990 from the cargo bay of the Space Shuttle Discovery (STS-31). The design of the HST took into consideration its length of service and the necessity of repairs and equipment replacement by making the body modular. In doing so, subsequent shuttle missions could recover the HST, replace faulty or obsolete parts and be re-released. Marshall Space Flight Center's (MSFC's) Neutral Buoyancy Simulator (NBS) served as the test center for shuttle astronauts training for Hubble related missions. Shown is astronaut Anna Fisher suited up for training on a mockup of a modular section of the HST for an axial scientific instrument change out.

  12. Astronaut Anna Fisher in NBS Training For Hubble Space Telescope

    Science.gov (United States)

    1980-01-01

    The Hubble Space Telescope (HST) is a cooperative program of the European Space Agency (ESA) and the National Aeronautical and Space Administration (NASA) to operate a long-lived space-based observatory. It was the flagship mission of NASA's Great Observatories program. The HST program began as an astronomical dream in the 1940s. During the 1970s and 1980s, the HST was finally designed and built becoming operational in the 1990s. The HST was deployed into a low-Earth orbit on April 25, 1990 from the cargo bay of the Space Shuttle Discovery (STS-31). The design of the HST took into consideration its length of service and the necessity of repairs and equipment replacement by making the body modular. In doing so, subsequent shuttle missions could recover the HST, replace faulty or obsolete parts and be re-released. Marshall Space Flight Center's (MSFC's) Neutral Buoyancy Simulator (NBS) served as the test center for shuttle astronauts training for Hubble related missions. Shown is astronaut Anna Fisher training on a mock-up of a modular section of the HST for an axial scientific instrument change out.

  13. The Complete Gabor-Fisher Classifier for Robust Face Recognition

    Directory of Open Access Journals (Sweden)

    Štruc Vitomir

    2010-01-01

    Full Text Available Abstract This paper develops a novel face recognition technique called Complete Gabor Fisher Classifier (CGFC. Different from existing techniques that use Gabor filters for deriving the Gabor face representation, the proposed approach does not rely solely on Gabor magnitude information but effectively uses features computed based on Gabor phase information as well. It represents one of the few successful attempts found in the literature of combining Gabor magnitude and phase information for robust face recognition. The novelty of the proposed CGFC technique comes from (1 the introduction of a Gabor phase-based face representation and (2 the combination of the recognition technique using the proposed representation with classical Gabor magnitude-based methods into a unified framework. The proposed face recognition framework is assessed in a series of face verification and identification experiments performed on the XM2VTS, Extended YaleB, FERET, and AR databases. The results of the assessment suggest that the proposed technique clearly outperforms state-of-the-art face recognition techniques from the literature and that its performance is almost unaffected by the presence of partial occlusions of the facial area, changes in facial expression, or severe illumination changes.

  14. PRECISE TULLY-FISHER RELATIONS WITHOUT GALAXY INCLINATIONS

    Energy Technology Data Exchange (ETDEWEB)

    Obreschkow, D.; Meyer, M. [International Centre for Radio Astronomy Research (ICRAR), M468, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009 (Australia)

    2013-11-10

    Power-law relations between tracers of baryonic mass and rotational velocities of disk galaxies, so-called Tully-Fisher relations (TFRs), offer a wealth of applications in galaxy evolution and cosmology. However, measurements of rotational velocities require galaxy inclinations, which are difficult to measure, thus limiting the range of TFR studies. This work introduces a maximum likelihood estimation (MLE) method for recovering the TFR in galaxy samples with limited or no information on inclinations. The robustness and accuracy of this method is demonstrated using virtual and real galaxy samples. Intriguingly, the MLE reliably recovers the TFR of all test samples, even without using any inclination measurements—that is, assuming a random sin i-distribution for galaxy inclinations. Explicitly, this 'inclination-free MLE' recovers the three TFR parameters (zero-point, slope, scatter) with statistical errors only about 1.5 times larger than the best estimates based on perfectly known galaxy inclinations with zero uncertainty. Thus, given realistic uncertainties, the inclination-free MLE is highly competitive. If inclination measurements have mean errors larger than 10°, it is better not to use any inclinations than to consider the inclination measurements to be exact. The inclination-free MLE opens interesting perspectives for future H I surveys by the Square Kilometer Array and its pathfinders.

  15. Fisher-Wright model with deterministic seed bank and selection.

    Science.gov (United States)

    Koopmann, Bendix; Müller, Johannes; Tellier, Aurélien; Živković, Daniel

    2017-04-01

    Seed banks are common characteristics to many plant species, which allow storage of genetic diversity in the soil as dormant seeds for various periods of time. We investigate an above-ground population following a Fisher-Wright model with selection coupled with a deterministic seed bank assuming the length of the seed bank is kept constant and the number of seeds is large. To assess the combined impact of seed banks and selection on genetic diversity, we derive a general diffusion model. The applied techniques outline a path of approximating a stochastic delay differential equation by an appropriately rescaled stochastic differential equation. We compute the equilibrium solution of the site-frequency spectrum and derive the times to fixation of an allele with and without selection. Finally, it is demonstrated that seed banks enhance the effect of selection onto the site-frequency spectrum while slowing down the time until the mutation-selection equilibrium is reached. Copyright © 2016 Elsevier Inc. All rights reserved.

  16. Front propagation and clustering in the stochastic nonlocal Fisher equation

    Science.gov (United States)

    Ganan, Yehuda A.; Kessler, David A.

    2018-04-01

    In this work, we study the problem of front propagation and pattern formation in the stochastic nonlocal Fisher equation. We find a crossover between two regimes: a steadily propagating regime for not too large interaction range and a stochastic punctuated spreading regime for larger ranges. We show that the former regime is well described by the heuristic approximation of the system by a deterministic system where the linear growth term is cut off below some critical density. This deterministic system is seen not only to give the right front velocity, but also predicts the onset of clustering for interaction kernels which give rise to stable uniform states, such as the Gaussian kernel, for sufficiently large cutoff. Above the critical cutoff, distinct clusters emerge behind the front. These same features are present in the stochastic model for sufficiently small carrying capacity. In the latter, punctuated spreading, regime, the population is concentrated on clusters, as in the infinite range case, which divide and separate as a result of the stochastic noise. Due to the finite interaction range, if a fragment at the edge of the population separates sufficiently far, it stabilizes as a new cluster, and the processes begins anew. The deterministic cutoff model does not have this spreading for large interaction ranges, attesting to its purely stochastic origins. We show that this mode of spreading has an exponentially small mean spreading velocity, decaying with the range of the interaction kernel.

  17. Hellmann–Feynman connection for the relative Fisher information

    Energy Technology Data Exchange (ETDEWEB)

    Venkatesan, R.C., E-mail: ravi@systemsresearchcorp.com [Systems Research Corporation, Aundh, Pune 411007 (India); Plastino, A., E-mail: plastino@fisica.unlp.edu.ar [IFLP, National University La Plata & National Research (CONICET) C. C., 727 1900, La Plata (Argentina)

    2015-08-15

    The (i) reciprocity relations for the relative Fisher information (RFI, hereafter) and (ii) a generalized RFI–Euler theorem are self-consistently derived from the Hellmann–Feynman theorem. These new reciprocity relations generalize the RFI–Euler theorem and constitute the basis for building up a mathematical Legendre transform structure (LTS, hereafter), akin to that of thermodynamics, that underlies the RFI scenario. This demonstrates the possibility of translating the entire mathematical structure of thermodynamics into a RFI-based theoretical framework. Virial theorems play a prominent role in this endeavor, as a Schrödinger-like equation can be associated to the RFI. Lagrange multipliers are determined invoking the RFI–LTS link and the quantum mechanical virial theorem. An appropriate ansatz allows for the inference of probability density functions (pdf’s, hereafter) and energy-eigenvalues of the above mentioned Schrödinger-like equation. The energy-eigenvalues obtained here via inference are benchmarked against established theoretical and numerical results. A principled theoretical basis to reconstruct the RFI-framework from the FIM framework is established. Numerical examples for exemplary cases are provided. - Highlights: • Legendre transform structure for the RFI is obtained with the Hellmann–Feynman theorem. • Inference of the energy-eigenvalues of the SWE-like equation for the RFI is accomplished. • Basis for reconstruction of the RFI framework from the FIM-case is established. • Substantial qualitative and quantitative distinctions with prior studies are discussed.

  18. KARL METAR

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — METAR is a routine scheduled observation and is the primary observation code used in the United States to satisfy requirements for reporting surface meteorological...

  19. Karl Polanyi

    DEFF Research Database (Denmark)

    Kjeldgaard, Dannie

    2018-01-01

    What are the origins of the marketing mind? In this introductory quotation Polanyi suggests that it springs from a specifi c type of economy that diffused in nineteenth century processes of industrialization that swept the world. As such, the marketing mind is a recent historic phenomenon; this qu......What are the origins of the marketing mind? In this introductory quotation Polanyi suggests that it springs from a specifi c type of economy that diffused in nineteenth century processes of industrialization that swept the world. As such, the marketing mind is a recent historic phenomenon......; this quotation seems to tell us. Rather than representing the vanguard of history, the marketing mind, the quotation also seems to tell us, is a “formidable obstacle” that possibly inhibits us from seeing how economy and sociality – our “livelihood” – potentially might be organized differently. In this chapter I...

  20. Determination of uranium by a gravimetric-volumetric titration method

    International Nuclear Information System (INIS)

    Krtil, J.

    1998-01-01

    A volumetric-gravimetric modification of a method for the determination of uranium based on the reduction of uranium to U (IV) in a phosphoric acid medium and titration with a standard potassium dichromate solution is described. More than 99% of the stoichiometric amount of the titrating solution is weighed and the remainder is added volumetrically by using the Mettler DL 40 RC Memotitrator. Computer interconnected with analytical balances collects continually the data on the analyzed samples and evaluates the results of determination. The method allows to determine uranium in samples of uranium metal, alloys, oxides, and ammonium diuranate by using aliquot portions containing 30 - 100 mg of uranium with the error of determination, expressed as the relative standard deviation, of 0.02 - 0.05%. (author)

  1. Coulometric thermometric titration of halides in molten calcium nitrate tetrahydrate.

    Science.gov (United States)

    Zsigrai, I J; Bartusz, D B

    1983-01-01

    A method for coulometric thermometric precipitation titrations of chloride, bromide and iodide in molten calcium nitrate tetrahydrate at 55 degrees with coulometrically generated silver ions has been developed. The change in temperature during the titration is followed with the aid of a thermistor bridge coupled to a recorder. To minimize the temperature effect of the passage of current through the melt, two thermistors are connected in opposition in the bridge, with one in the anodic and the other in the cathodic cell compartment. Amounts of 62-80 mumole of halide have been determined with relative error below 0.4% and relative standard deviation less than 2.7%. The relative error in determination of 40 mumole of iodide was + 2%.

  2. Application of cause-and-effect analysis to potentiometric titration.

    Science.gov (United States)

    Kufelnicki, A; Lis, S; Meinrath, G

    2005-08-01

    A first attempt has been made to interpret physicochemical data from potentiometric titration analysis in accordance with the complete measurement-uncertainty budget approach (bottom-up) of ISO and Eurachem. A cause-and-effect diagram is established and discussed. Titration data for arsenazo III are used as a basis for this discussion. The commercial software Superquad is used and applied within a computer-intensive resampling framework. The cause-and-effect diagram is applied to evaluation of seven protonation constants of arsenazo III in the pH range 2-10.7. The data interpretation is based on empirical probability distributions and their analysis by second-order correct confidence estimates. The evaluated data are applied in the calculation of a speciation diagram including uncertainty estimates using the probabilistic speciation software Ljungskile.

  3. Two-phase titration of cerium(3) by permanganate

    International Nuclear Information System (INIS)

    Lazarev, A.I.; Lazareva, V.I.; Gerko, V.V.

    1986-01-01

    Reaction of cerium (3) and permanganate was investigated at a room temperature depending on PH, concentrations of pyrophosphate, cerium (3), tetraphenylphosphonium and foreign compounds. Selective method of two-phase titration determination of cerium (3) by permanganate without using silver compounds, preliminary separation of chlorides, nitrates, was developed. The method was tested using alloys based on iron, nickel, REE, copper, cobalt (S r ≤0.008). Correctness is proved with method of standard additives

  4. Characterization of Native and Modified Starches by Potentiometric Titration

    OpenAIRE

    Soto, Diana; Urdaneta, Jose; Pernia, Kelly

    2014-01-01

    The use of potentiometric titration for the analysis and characterization of native and modified starches is highlighted. The polyelectrolytic behavior of oxidized starches (thermal and thermal-chemical oxidation), a graft copolymer of itaconic acid (IA) onto starch, and starch esters (mono- and diester itaconate) was compared with the behavior of native starch, the homopolymer, and the acid employed as a graft monomer and substituent. Starch esters showed higher percentages of acidity, follo...

  5. Determination of uranium and plutonium by sequential potentiometric titration

    International Nuclear Information System (INIS)

    Kato, Yoshiharu; Takahashi, Masao

    1976-01-01

    The determination of uranium and plutonium in mixed oxide fuels has been developed by sequential potentiometric titration. A weighed sample of uranium and plutonium oxides is dissolved in a mixture of nitric and hydrofluoric acids and the solution is fumed with sulfuric acid. After the reduction of uranium and plutonium to uranium(IV) and plutonium(III) by chromium(II) sulfate, 5 ml of buffer solution (KCl-HCl, pH 1.0) is added to the solution. Then the solution is diluted to 30 ml with water and the pH of the solution is adjusted to 1.0 -- 1.5 with 1 M sodium hydroxide. The solution is stirred until the oxidation of the excess of chromium(II) by air is completed. After the removal of dissolved oxygen by bubbling nitrogen through the solution for 10 minutes, uranium (IV) is titrated with 0.1 N cerium(IV) sulfate. Then, plutonium is titrated by 0.02 N cerium(IV) sulfate. When a mixture of uranium and plutonium is titrated with 0.1 N potassium dichromate potentiometrically, the potential change at the end point of plutonium is very small and the end point of uranium is also unclear when 0.1 N potassium permanganate is used as a titrant. In the present method, nitrate, fluoride and copper(II) interfere with the determination of plutonium and uranium. Iron interferes quantitatively with the determination of plutonium but not of uranium. Results obtained in applying the proposed method to 50 mg of mixtures of plutonium and uranium ((7.5 -- 50))% Pu were accurate to within 0.15 mg of each element. (auth.)

  6. Protometric thermometric titrations of sparingly soluble compounds in water in the presence of n-octanol.

    Science.gov (United States)

    Burgot, G; Burgot, J-L

    2002-10-15

    Thermometric titrimetry permits titration of acido-basic compounds in water in the presence of n-octanol. n-Octanol permits the solubilization of protolytes and moreover may also displace the equilibria of the titration reactions. Hydrochlorides of highly insoluble derivatives such as phenothiazine derivatives can be titrated with satisfactory accuracy and precision by sodium hydroxide despite their high pK(a) values. Likewise barbiturate salts can be titrated by hydrochloric acid. In the case of some salts, the methodology may permit the sequential titration of the ion and counter ion. Copyright 2002 Elsevier Science B.V.

  7. A rapid method for titration of ascovirus infectivity.

    Science.gov (United States)

    Han, Ningning; Chen, Zishu; Wan, Hu; Huang, Guohua; Li, Jianhong; Jin, Byung Rae

    2018-05-01

    Ascoviruses are a recently described family and the traditional plaque assay and end-point PCR assay have been used for their titration. However, these two methods are time-consuming and inaccurate to titrate ascoviruses. In the present study, a quick method for the determination of the titer of ascovirus stocks was developed based on ascovirus-induced apoptosis in infected insect cells. Briefly, cells infected with serial dilutions of virus (10 -2 -10 -10 ) for 24 h were stained with trypan blue. The stained cells were counted, and the percentage of nonviable cells was calculated. The stained cell rate was compared between virus-infected and control cells. The minimum-dilution group that had a significant difference compared with control and the maximum-dilution group that had no significant difference were selected and then compared each well of the two groups with the average stained cell rate of control. The well was marked as positive well if the stained cell rate was higher than the average stained cell rate of control wells; otherwise, the well was marked as negative wells. The percentage of positive wells were calculated according to the number of positive. Subsequently, the virus titer was calculated through the method of Reed and Muench. This novel method is rapid, simple, reproducible, accurate, and less material-consuming and eliminates the subjectivity of the other procedures for titrating ascoviruses. Copyright © 2018 Elsevier B.V. All rights reserved.

  8. Interaction of molybdenum (6) with potassium benzyldithiocarbaminate during amperometric titration

    International Nuclear Information System (INIS)

    Galushko, S.V.; Usatenko, Yu.I.

    1975-01-01

    The paper is an amperometric study of the mechanism of interaction between molybdenum (VI) and potassium benzyl dithiocarbamate [BDTC] which was based on the use of voltamperometry, electron paramagnetic resonance, infrared spectroscopy, potentiometry and elemental analysis. In amperometric titration Mo(VI) with BDTC (pH 4-2) forms a red compound of low solubility. In more acidic media the intensity of coloration is increased and a violet hue develops. On the basis of the data obtained it is concluded that in the amperometric titration of Mo(VI) with potassium BDTC there is first formation of a Mo(VI) compound, which subsequently acquires a red colour as a result of the reduction of Mo(VI) to Mo(V). It was also established that the degree of reduction is small where titration is carried out in the range pH 4.8-0.1. Quantitative determination of Mo is performed most effectively in slightly acidic media. Mo reacts with potassium BDTC in a ratio of 1:2. (E.P.)

  9. A Case of Miller Fisher Syndrome, Thromboembolic Disease, and Angioedema: Association or Coincidence?

    Science.gov (United States)

    Salehi, Nooshin; Choi, Eric D; Garrison, Roger C

    2017-01-16

    BACKGROUND Miller Fisher Syndrome is characterized by the clinical triad of ophthalmoplegia, ataxia, and areflexia, and is considered to be a variant of Guillain-Barre Syndrome. Miller Fisher Syndrome is observed in approximately 1-5% of all Guillain-Barre cases in Western countries. Patients with Miller Fisher Syndrome usually have good recovery without residual deficits. Venous thromboembolism is a common complication of Guillain-Barre Syndrome and has also been reported in Miller Fisher Syndrome, but it has generally been reported in the presence of at least one prothrombotic risk factor such as immobility. A direct correlation between venous thromboembolism and Miller Fisher Syndrome or Guillain-Barre Syndrome has not been previously described. CASE REPORT We report the case of a 32-year-old Hispanic male who presented with acute, severe thromboembolic disease and concurrently demonstrated characteristic clinical features of Miller Fisher Syndrome including ophthalmoplegia, ataxia, and areflexia. Past medical and family history were negative for thromboembolic disease, and subsequent hypercoagulability workup was unremarkable. During the course of hospitalization, the patient also developed angioedema. CONCLUSIONS We describe a possible association between Miller Fisher Syndrome, thromboembolic disease, and angioedema.

  10. Understanding Recreational Fishers' Compliance with No-take Zones in the Great Barrier Reef Marine Park

    Directory of Open Access Journals (Sweden)

    Adrian Arias

    2013-12-01

    Full Text Available Understanding fishers' compliance is essential for the successful management of marine protected areas. We used the random response technique (RRT to assess recreational fishers' compliance with no-take zones in the Great Barrier Reef Marine Park (GBRMP. The RRT allowed the asking of a sensitive question, i.e., "Did you, knowingly, fish within in a Green Zone during the last 12 months?" while protecting respondents' confidentiality. Application of the RRT through a survey of recreational fishers indicated that the majority of recreational fishers, 90%, comply with no-take zones. Likewise, most fishers, 92%, reported not personally knowing anyone who had intentionally fished in a no-take zone, indicating that fishers' perceive high levels of compliance among their peers. Fishers were motivated to comply with no-take zones primarily by their beliefs about penalties for noncompliance, followed by beliefs about the fishery benefits of no-take zones. Results suggest that compliance-related communication efforts by the managing authority have partially succeeded in maintaining appropriate compliance levels and that future efforts should accentuate normative compliance drivers that will encourage voluntary compliance. We conclude that compliance monitoring should be integrated into the adaptive management of the GBRMP and other protected areas; in this case social surveys using the RRT are effective tools.

  11. Naised käsu korras firmade juhatusse! Jah või ei? / Kairi Alt, Aveli Kippari, Karl Koort... [jt.

    Index Scriptorium Estoniae

    2011-01-01

    Küsimusele vastavad Columbus IT Partner Eesti AS personalijuht Kairi Alt, Stele ja Riveli omanik Aveli Kippari, AS Panaviatic'i turundusjuht Karl Koort, OÜ Tarkvara Tehnoloogia Arenduskeskuse tegevjuht Indrek Vainu, AS PricewaterhouseCoopers auditiosakonna direktor Eva Jansen, Kalev Chocolate Factory tootmisjuht Hardo Reinike

  12. Karl Schwarzschild's investigations of `out-of-focus photometry' between 1897 and 1899 at Kuffner Observatory in Vienna

    Science.gov (United States)

    Habison, Peter

    From 1897 to 1899 Karl Schwarzschild worked at the Kuffner Observatory in Vienna. During these years he developed new measuring techniques in the field of photographic photometry, where he studied particularly the quantitative determination of the departure from the reciprocity law during photographic exposure. This paper concentrates on Schwarzschild's early work in this field and gives an overview of his important Viennese years.

  13. Blank ja Jeron (sero.org) / Joachim Blank, Karl Heinz Jeron ; interv. Tilman Baumgärtel

    Index Scriptorium Estoniae

    Blank, Joachim

    2006-01-01

    Nime sero.org all esinenud saksa kunstnikepaarist Joachim Blankist (sünd. 1963) ja Karl Heinz Jeronist ning nende loomingust, intervjuu kunstnikega nende Berliini ateljees 10. II 2000. Saksa võrgukunsti edendamisest rühmituste Lux Logis, Handshake ja Internationale Stadt koosseisus, jututubadest, teostest "Dump your trash", "Re-M@il", installatsioonidest "re: represent", "Scanner +++", "sign.post" ja muust

  14. Mida kujutab endast IB õppekava? / Toomas Kruusimägi, Anu Parts, Karl Hendrik Thomson ; intervjueerinud Raivo Juurak

    Index Scriptorium Estoniae

    Kruusimägi, Toomas, 1962-

    2010-01-01

    Uuest rahvusvahelisest International Baccalaureate'i (IB) õppekavast ja selle rakendamisest Tallinna Inglise Kolledži 11. klassis alates möödunud aastast räägivad kooli direktor Toomas Kruusimägi, õppedirektor Anu Parts ning õpilane Karl Hendrik Thomson

  15. [Development, problems and results of specialty-specific genetic counseling at the Neurology Clinic of the Karl Marx University].

    Science.gov (United States)

    Bachmann, H

    1987-11-01

    Genetic counselling for inherited neurological diseases has been established at the Clinic for Neurology of Karl Marx University. Comprehensive experiences have been got with the specific and sometimes markedly different problems and aims of counselling in Wilsons disease, X-linked recessive muscular dystrophies, myotonic dystrophy and other neuromuscular disorders, Huntingtons chorea and hereditary ataxias.

  16. [From Paul Flechsig to the Paul Flechsig Institute for Brain Research. Development of brain research at the Karl Marx University].

    Science.gov (United States)

    Leibnitz, L; Werner, L; Schober, W; Brauer, K

    1977-04-01

    A review is given on the development of the brain research institute of the Karl-Marx-University of Leipzig during the directorates of Paul Flechsig (1883-1920), Richard Arwed Pfeifer (1925-1957), and Wolfgang Wünscher (1957-1971).

  17. [Territorial differences in the occurrence of caries in Karl Marx Stadt children and adolescent after 12 years of water fluoridation].

    Science.gov (United States)

    Künzel, W

    1976-01-01

    Cariostatistical comparisons made since the start of drinking-water fluoridation in Karl-Marx-Stadt suggested territorial differences in the prevalence of dental decay. In the present paper an attempt is made to analyse the problems involved, with due consideration being given to both demographic and ecological factors.

  18. Understanding the Relationships Between Lightning, Cloud Microphysics, and Airborne Radar-derived Storm Structure During Hurricane Karl (2010)

    Science.gov (United States)

    Reinhart, Brad; Fuelberg, Henry; Blakeslee, Richard; Mach, Douglas; Heymsfield, Andrew; Bansemer, Aaron; Durden, Stephen L.; Tanelli, Simone; Heymsfield, Gerald; Lambrigtsen, Bjorn

    2013-01-01

    This study explores relationships between lightning, cloud microphysics, and tropical cyclone (TC) storm structure in Hurricane Karl (16 September 2010) using data collected by the NASA DC-8 and Global Hawk (GH) aircraft during NASA's Genesis and Rapid Intensification Processes (GRIP) experiment. The research capitalizes on the unique opportunity provided by GRIP to synthesize multiple datasets from two aircraft and analyze the microphysical and kinematic properties of an electrified TC. Five coordinated flight legs through Karl by the DC-8 and GH are investigated, focusing on the inner-core region (within 50km of the storm center) where the lightning was concentrated and the aircraft were well coordinated. GRIP datasets are used to compare properties of electrified and nonelectrified inner-core regions that are related to the noninductive charging mechanism, which is widely accepted to explain the observed electric fields within thunderstorms. Three common characteristics of Karl's electrified regions are identified: 1) strong updrafts of 10-20ms21, 2) deep mixed-phase layers indicated by reflectivities.30 dBZ extending several kilometers above the freezing level, and 3) microphysical environments consisting of graupel, very small ice particles, and the inferred presence of supercooled water. These characteristics describe an environment favorable for in situ noninductive charging and, hence, TC electrification. The electrified regions in Karl's inner core are attributable to a microphysical environment that was conducive to electrification because of occasional, strong convective updrafts in the eyewall.

  19. Cerebellar and pontine tegmental hypermetabolism in miller-fisher syndrome

    International Nuclear Information System (INIS)

    Kim, Yu Kyrong; Kim, Ji Soo; Lee, Won Woo; Kim, Sang Eun

    2007-01-01

    Miller Fisher syndrome (MFS) has been considered as a variant of Guillain-Barre syndrome (GBS), a type of acute immune neuropathies involving peripheral nerve system. Unlike GBS, presence of cerebellar type ataxia and supranuclear ophthalmioplesia in MFS suggests additional involvement of the central nervous system. To determine involvement of the central nervous system in MFS, we investigated the cerebral metabolic abnormalities in patients with MFS using FDG PET. Nine patients who were diagnosed as MFS based on acute ophthalmoplegia, ataxia, and areflexia without other identifiable causes participated in this study. In six patients, serum antibodies possibly related with symptom of MFS (anti- GQ1b or anti-GM1) were detected at the time of the study. With the interval of 25 26 days (range: 3-83 days) from the symptom on set, brain FDG PET were underwent in patients and compared with those from healthy controls. In group analysis comparing with healthy controls, FDG PET of patients revealed increased metabolism in the bilateral cerebellar hemispheres and vermis, and the thalamus. In contrast, the occipital cortex showed decreased metabolism. Individual analyses disclosed hypermetabolism in the cerebellar vermis or hemispheres in 5, and in the pontine tegmentum in 2 of the 9 patients. We also found that the cerebellar vermian hypermetabolism was inversely correlated with the interval between from the symptom on set to PET study. Moreover, follow-up PET of a patient demonstrated that cerebellar hypermetabolism decreased markedly with an improvement of the ophthalmoplegia and ataxia. These findings indicate an involvement of the central nervous system in MFS and suggest an antibody-associated acute inflammatory process as a mechanism of this disorder

  20. Cerebellar and pontine tegmental hypermetabolism in miller-fisher syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Yu Kyrong; Kim, Ji Soo; Lee, Won Woo; Kim, Sang Eun [Seoul National Univ. College of Medicine, Seoul (Korea, Republic of)

    2007-07-01

    Miller Fisher syndrome (MFS) has been considered as a variant of Guillain-Barre syndrome (GBS), a type of acute immune neuropathies involving peripheral nerve system. Unlike GBS, presence of cerebellar type ataxia and supranuclear ophthalmioplesia in MFS suggests additional involvement of the central nervous system. To determine involvement of the central nervous system in MFS, we investigated the cerebral metabolic abnormalities in patients with MFS using FDG PET. Nine patients who were diagnosed as MFS based on acute ophthalmoplegia, ataxia, and areflexia without other identifiable causes participated in this study. In six patients, serum antibodies possibly related with symptom of MFS (anti- GQ1b or anti-GM1) were detected at the time of the study. With the interval of 25 26 days (range: 3-83 days) from the symptom on set, brain FDG PET were underwent in patients and compared with those from healthy controls. In group analysis comparing with healthy controls, FDG PET of patients revealed increased metabolism in the bilateral cerebellar hemispheres and vermis, and the thalamus. In contrast, the occipital cortex showed decreased metabolism. Individual analyses disclosed hypermetabolism in the cerebellar vermis or hemispheres in 5, and in the pontine tegmentum in 2 of the 9 patients. We also found that the cerebellar vermian hypermetabolism was inversely correlated with the interval between from the symptom on set to PET study. Moreover, follow-up PET of a patient demonstrated that cerebellar hypermetabolism decreased markedly with an improvement of the ophthalmoplegia and ataxia. These findings indicate an involvement of the central nervous system in MFS and suggest an antibody-associated acute inflammatory process as a mechanism of this disorder.

  1. The different baryonic Tully-Fisher relations at low masses.

    Science.gov (United States)

    Brook, Chris B; Santos-Santos, Isabel; Stinson, Greg

    2016-06-11

    We compare the Baryonic Tully-Fisher relation (BTFR) of simulations and observations of galaxies ranging from dwarfs to spirals, using various measures of rotational velocity V rot . We explore the BTFR when measuring V rot at the flat part of the rotation curve, V flat , at the extent of H i gas, V last , and using 20 per cent ( W 20 ) and 50 per cent ( W 50 ) of the width of H i line profiles. We also compare with the maximum circular velocity of the parent halo, [Formula: see text], within dark matter only simulations. The different BTFRs increasingly diverge as galaxy mass decreases. Using V last  one obtains a power law over four orders of magnitude in baryonic mass, with slope similar to the observed BTFR. Measuring V flat gives similar results as V last when galaxies with rising rotation curves are excluded. However, higher rotation velocities would be found for low-mass galaxies if the cold gas extended far enough for V rot to reach a maximum. W 20 gives a similar slope as V last but with slightly lower values of V rot for low-mass galaxies, although this may depend on the extent of the gas in your galaxy sample. W 50 bends away from these other relations towards low velocities at low masses. By contrast, [Formula: see text] bends towards high velocities for low-mass galaxies, as cold gas does not extend out to the radius at which haloes reach [Formula: see text]. Our study highlights the need for careful comparisons between observations and models: one needs to be consistent about the particular method of measuring V rot , and precise about the radius at which velocities are measured.

  2. The Baryonic Tully Fisher Relation for the ALFALFA 100 Sample

    Science.gov (United States)

    Finney, Elizabeth E.; Haynes, Martha P.; APPSS Team

    2018-01-01

    The APPSS (Arecibo Pisces-Perseus Supercluster Survey) team aims to quantify the over-densities of matter in the Pisces-Perseus Supercluster (PPS) filament by exploring the Baryonic Tully Fisher Relation (BTFR) of the ALFALFA (Arecibo Legacy Fast ALFA) 100 survey – (α.100) and, in the future, using targeted observations of low mass star-forming galaxies. Galaxies in the PPS filament region and its foreground and background voids are influenced by the gravitational pull of the large concentration of matter, and are expected to show velocities that deviate significantly from the smooth Hubble expansion. By deriving the peculiar motions of galaxies in the ALFALFA 100 survey as measured by the BTFR, we will further our understanding of the amount and distribution of the underlying dark matter in the supercluster. In this project, we make a first attempt to investigate the BTFR of the α.100 sample, and discuss our findings. This sample was corrected for inclination, extinction, and other sources of scatter, and a least squares linear regression fit was applied to determine the slope of the BTFR. We compare the slope of the α.100 sample to various literature values, and find that the slope is shallower due to slower-rotating, low-mass galaxies. Investigation of this shallow slope is needed in future work, as well as a modification of the intrinsic axial ratio assumed for this sample of galaxies. EF participated in the summer 2017 REU program in the Center for Astrophysics and Planetary Science at Cornell University under NSF award AST-1659264.

  3. Dangers, delights, and destiny on the sea: fishers along the East coast of north sumatra, indonesia.

    Science.gov (United States)

    Markkanen, Pia

    2005-01-01

    This article describes a collaborative project between the International Labour Organization's International Programme on the Elimination of Child Labour (IPEC) and the Lowell Center for Sustainable Production, in identifying work hazards of fishers along the east coast of North Sumatra, Indonesia, in July 2004. The study employed qualitative investigation techniques: participant observations at fishing villages and harbors; and interviews with local fishers and skippers. Fishers work long hours in life-threatening conditions, often with low pay. It would be synergistic to incorporate fishing safety and health policies and advocacy efforts into reconstruction undertakings of fisheries devastated by the 2004 tsunami.

  4. Post Tsunami Job Satisfaction among the Fishers of Na Pru Village, on the Andaman Sea Coast of Thailand

    Science.gov (United States)

    Pollnac, Richard B.; Kotowicz, Dawn

    2012-01-01

    The paper examines job satisfaction among fishers in a tsunami-impacted area on the Andaman coast of Thailand. Following the tsunami, many predicted that fishers would be reluctant to resume their fishing activities. Observations in the fishing communities, however, indicated that as soon as fishers obtained replacements for equipment damaged by…

  5. 40 CFR Appendix IV to Part 264 - Cochran's Approximation to the Behrens-Fisher Students' t-test

    Science.gov (United States)

    2010-07-01

    ...-Fisher Students' t-test IV Appendix IV to Part 264 Protection of Environment ENVIRONMENTAL PROTECTION... to the Behrens-Fisher Students' t-test Using all the available background data (nb readings... Table III of “Statistical Tables for Biological, Agricultural, and Medical Research” (1947, R. A. Fisher...

  6. Stand- and landscape-scale selection of large trees by fishers in the Rocky Mountains of Montana and Idaho

    Science.gov (United States)

    Michael K. Schwartz; Nicholas J. DeCesare; Benjamin S. Jimenez; Jeffrey P. Copeland; Wayne E. Melquist

    2013-01-01

    The fisher (Pekania pennanti; formerly known as Martes pennanti) is a North American endemic mustelid with a geographic distribution that spans much of the boreal forests of North America. In the Northern Rocky Mountain (NRM) fishers have been the focus of Endangered Species Act (ESA) listing decisions. Habitat studies of West Coast fishers in California have...

  7. A new approach to flow-batch titration. A monosegmented flow titrator with coulometric reagent generation and potentiometric or biamperometric detection.

    Science.gov (United States)

    de Aquino, Emerson Vidal; Rohwedder, Jarbas José Rodrigues; Pasquini, Celio

    2006-11-01

    Monosegmented flow analysis (MSFA) has been used as a flow-batch system to produce a simple, robust, and mechanized titrator that enables true titrations to be performed without the use of standards. This paper also introduces the use of coulometry with monosegmented titration by proposing a versatile flow cell. Coulometric generation of the titrand is attractive for titrations performed in monosegmented systems, because the reagent can be added without increasing the volume of sample injected. Also, biamperomeric and potentiometric detection of titration end-points can increase the versatility of the monosegmented titrator. The cell integrates coulometric generation of the titrand with detection of end-point by potentiometry or biamperometry. The resulting titrator is a flow-batch system in which the liquid monosegment, constrained by the interfaces of the gaseous carrier stream, plays the role of a sample of known volume to be titrated. The system has been used for determination of ascorbic acid, by coulometric generation of I2 with biamperometric detection, and for determination of Fe(II), by coulometric generation of Ce(IV) with potentiometric detection of the end-point, both in feed supplements.

  8. FILSAFAT ILMU KARL R. POPPER DAN THOMAS S. KUHN SERTA IMPLIKASINYA DALAM PENGAJARAN ILMU

    Directory of Open Access Journals (Sweden)

    Slamet Subekti

    2016-04-01

    Full Text Available This article discusses about philosophy of science according to Karl R. Popper and Thomas S. Kuhn. There are similarities and differences between their views about how progress and what function of science.Apparently both Popper and Kuhn agree that science does not proceed by induction. However Kuhn disagrees with the view that science progresses by falsifiability through conjectures and refutations, but occurance by paradigm shift. Popper and Kuhn’s disagreement amounted to a distinction between two functions within the practice of science, one of criticism (Popper and one of puzzle solving (Kuhn.Science education implies the teaching and learning of science interesting and fruitful in one hand, and teachers should be role models to students in the other hand

  9. Study of the magnetic spectrograph BIG KARL on image errors and their causes

    International Nuclear Information System (INIS)

    Paul, D.

    1987-12-01

    The ionoptical aberrations of the QQDDQ spectrograph BIG KARL are measured and analyzed in order to improve resolution and transmission at large acceptance. The entrance phasespace is scanned in a cartesian grid by means of a narrow collimated beam of scattered deuterons. The distortions due to the nonlinear transformation by the system are measured in the detector plane. A model is developed which describes the measured distortions. The model allows to locate nonlinearities in the system responsible for the observed distortions. It gives a good understanding of geometrical nonlinearities up to the fifth order and chromatical nonlinearities up to the third order. To confirm the model, the magnetic field in the quadrupoles is measured including the fringe field region. Furthermore, nonlinearities appearing in ideal magnets are discussed and compared to experimental data. (orig.) [de

  10. Vital forces and organization: philosophy of nature and biology in Karl Friedrich Kielmeyer.

    Science.gov (United States)

    Gambarotto, Andrea

    2014-12-01

    The historical literature on German life science at the end of the 18th century has tried to rehabilitate eighteenth century vitalism by stressing its difference from Naturphilosophie. Focusing on the work of Karl Friedrich Kielmeyer this paper argues that these positions are based on a historiographical bias and that the clear-cut boundary between German vitalism and Naturphilosophie is historically unattested. On the contrary, they both belong to the process of conceptual genealogy that contributed to the project of a general biology. The latter emerged as the science concerned with the laws that regulate the organization of living nature as a whole. The focus on organization was, at least partially, the result of the debate surrounding the notion of "vital force", which originated in the mid-eighteenth century and caused a shift from a regulative to a constitutive understanding of teleology. Copyright © 2014 Elsevier Ltd. All rights reserved.

  11. Historical consciousness and existential awareness in Karl Barth’s hermeneutics

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    G.M.M. Pelser

    2007-05-01

    Full Text Available Karl Barth’s hermeneutic legacy prolonged Western Christian tradition, especially influenced by Hegelian philosophy of history. This led to Barth’s “theological exegesis” instead of a historic-critical exegesis. In a preceding article Barth’s understanding of the notion “hermeneutic circle” is discussed against the background of the Enlightenment and its counter-movement in Romanticism. In this article Barth’s attitude to the place and role of historical criticism is explained in light of his dialectic distinction between “scientific” and “practical” interpretation. The article aims to show that Barth, with his dialectics, continues Schleiermacher’s realism. In conclusion, the positivistic traits in the Barth legacy are raised once again, in order to open the door to Jürgen Habermas and other deconstructionist thinkers of the postmodern era in hermeneutics.

  12. Paul Karl Feyerabend: The Projections of Theoretical Proliferation in the Relation Science-Metaphysics

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    María Teresa Gargiulo de Vázquez

    2015-05-01

    Full Text Available The Paul Karl Feyerabend’s doctrine of theoretical proliferation has been interpreted by his experts as an attempt to preserve the ideal of scientific progress. This hermeneutics describes, in part, the intention of our philosopher. However, this reading does not explain the fundamental criticism that theoretical pluralism supposes for Feyerabend. The theoretical proliferation is itself a reductio ad absurdum of the attempts of logical positivism and critical rationalism to define science at the expense of the metaphysical. This article presents the theoretical proliferation as a vindication of the positive role that the metaphysical plays in scientific practice. We expose the Feyerabend’s defense of metaphysics inasmuch as it is constitute the possibility to overcome the conceptual conservatism, to increase empirical content of science and to recover the descriptive value of scientific theories.

  13. Natural Selection or Problem Solving. Critical Re-evaluation of Karl Popper's Evolutionism

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    Boldachev Alexander

    2014-09-01

    Full Text Available Among the philosophers and the educated audience the name of Sir Karl Popper is usually associated with the critical method, evolutionary epistemology, falsification as a criterion for the demarcation of scientific knowledge, the concept of the third world and with his dislike to dialectics and contradictions. This article is aimed to show in what way all these things are connected in the evolutionary researches of the philosopher and the new conceptions, which he contributed to studying the mechanisms of evolution. Also there is an attempt to comprehend the evolutionary views of Popper, test them for falsification, relate his epistemology with his claims, which he puts forward to the theory of objective knowledge evolution and show the obvious contradiction between them.

  14. Proposal for the ion optics and for the kinematical fitting at the magnetic spectrograph BIG KARL

    International Nuclear Information System (INIS)

    Hinterberger, F.

    1986-01-01

    For the magnetic spectrograph BIG KARL the installation of an additional quadrupole lens is purposed. From this the possibility of a telescopic ion optic results. For future experiments a standard focusing with a spatial dispersion of 6.6 m and vanishing angular dispersion is proposed. The D/M ratio (dispersion/magnification) extends to 14.0 m, the maximal spatial angle lies at 3 msr. The energy range extends at a focal plane length of 0.66 m to 20%. For the kinematical fitting of the spectrograph the focal plane is shifted. This shift can be simply and rapidly realized for different K values by means of a software correction, if generally two spatial spectra in the focal plane are taken up. By this additionally for each event the actual scattering angle can be determined with relatively good resolution. The dispersion fit is completely decoupled from the kinematical fitting of the magnetic spectrograph. (orig.) [de

  15. Hermeneutic and Teleology in Ethics across Denominations—Thomas Aquinas and Karl Barth

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    Jacqueline Stewart

    2017-09-01

    Full Text Available This study arises from the context of current debates in the Catholic Church on the place of rule and law in moral reasoning. I suggest that ethics may be best served by approaches that place the human subject in a teleogical context and that recognise the need for interpretation of circumstances surrounding actions to be evaluated. This is in contrast to normative rule approaches. The insights retrieved from the account of moral reasoning in Thomas Aquinas by Joseph Selling are compared with an account of the ethical implications of Karl Barth’s theology of hope as expressed in Volume Four of the Church Dogmatics. It is concluded that, in an ecumenical convergence, neither propose a normative rule approach. Rather both use a teleological context and require a hermeneutic of evaluation.

  16. Rationalism and traditionalism in politics. The correspondence between Karl R. Popper and Michael Oakeshott

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    Spartaco Pupo

    2016-07-01

    Full Text Available The correspondence of 1948 between Karl Popper and Michael Oakeshott, translated for the first time in Italian and published in the appendix to this paper, demonstrates the existence of two different ways of thinking about politics: the rationalist approach, founded on the “argumentation” as a rational means for the non-violent solution of problems (Popper, and the traditionalist mode, inspired by the method of “conversation” as a guarantee of constant openness to the diversity of identities (Oakeshott. To rise from the letters is a mutual influence on the interpretation of the key concepts that characterize the thought of the two authors, which however does not cancel the fundamental divergence of their political orientation.

  17. Sir Peter Medawar: science, creativity and the popularization of Karl Popper

    Science.gov (United States)

    Calver, Neil

    2013-01-01

    Sir Peter Medawar was respected by scientists and literati alike. It was perhaps not surprising, then, that he would choose to involve himself in the ‘two cultures’ debate of 1959 and beyond. The focus of his intervention was the philosophy of Sir Karl Popper. However, Medawar's Popper was not the guru of falsification familiar from philosophy textbooks. Medawar's distinctive interpretation of Popper treated him instead as the source of insights into the role of creativity and imagination in scientific inquiry. This paper traces the context for Medawar's adoption of Popperian philosophy, together with its application before the debate. It then examines, within the context of the debate itself, the way in which Medawar attempted to reconcile scientific inquiry with literary practice. Medawar became increasingly convinced that not only was induction epistemologically unsound, but it was also damaging to the public role of the scientist. His construction of Popperianism would, he envisaged, provide a worthy alternative for scientists’ self-image.

  18. Karl Popper: La explicación en la disciplina histórica

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    Holbein Giraldo-Paredes

    2013-01-01

    Full Text Available En el siguiente artículo se revisan los argumentos enunciados en la obra La miseria del historicismo, en la cual Karl Popper realiza una crítica a la concepción historicista emanada de la filosofía de autores como Platón, Hegel y Marx. Crítica que realiza aludiendo a argumentos de orden epistemológico, para demostrar que el modelo nomológico deductivo de la explicación no aplica a la disciplina histórica, y en este sentido negando una de las tesis más fuertes que él había defendido toda su vida: la del monismo metodológico o unificacionismo metodológico de la ciencia, heredada del positivismo lógico.

  19. Bacteriological findings in patients with bone marrow transplantation (Karl Marx University Leipzig, 1985-1987).

    Science.gov (United States)

    Wonitzki, C; Hoffmann, F A

    1989-01-01

    The results of the bacteriological surveillance cultures for 26 patients with bone marrow transplantation (Karl Marx University Leipzig, G.D.R., 1985-1987) are presented. 5.9% of all surveillance cultures contained facultatively pathogenic germs (with Pseudomonas aeruginosa as the most frequent representative, which was the reason of a sepsis in two patients). Coagulasenegative Staphylococci and other germs with an obscure pathogenicity were isolated upon a large scale, especially from the mucous membrane regions. There are hints, that above all special strains of coagulasenegative Staphylococci "colonize" the patient's body (also for longer periods) and turn into the blood too. During the total decontamination intestinal anaerobic flora is absent. After closing of total decontamination Clostridium perfringens is the first detectable anaerobic species. During the selective decontamination systemic applications of antibiotics are able to obliterate anaerobic findings for certain periods. Recommendations for an effective arrangement of the surveillance cultures of bone marrow transplantation patients are given.

  20. Clever Hans and his effects: Karl Krall and the origins of experimental parapsychology in Germany.

    Science.gov (United States)

    De Sio, Fabio; Marazia, Chantal

    2014-12-01

    Shortly before the outbreak of World War I, the so-called Elberfeld horses, the counting and speaking animals, were among the most debated subjects of the newborn comparative psychology. Yet, they have left little trace in the historiography of this discipline, mostly as an appendix of the more famous Clever Hans. Their story is generally told as the prelude to the triumph of reductionistic experimental psychology. By paying a more scrupulous attention than has so far being done to the second life of Hans, and to the endeavours of his second master, Karl Krall, this article explores the story of the Elberfeld horses as an important, if so far neglected, chapter in the history of experimental parapsychology. Copyright © 2014 Elsevier Ltd. All rights reserved.

  1. ["Homesickness and crime"--a contribution of Karl Jaspers to criminal psychology].

    Science.gov (United States)

    Bachhiesl, Sonja Maria

    2009-01-01

    Even a century after its first publication in "Archives of Criminology" (in German: Archiv für Kriminologie), the doctoral thesis of Karl Jaspers (1883-1969), which was newly edited in 1996, continues to be of interest. Although the crimes described by Jaspers, which took place in a rural area, do no longer occur in this form just as the rural culture itself has disappeared, this paper nevertheless contains reflections that may also be relevant for the interpretation of modern potentials of conflict and violence and crimes rooted therein. The former homesickness has developed into novel phenomena of uprooting. In both cases, problems of maladjustment are a contributing factor to crime motivation. Thus despite all terminological and methodological change, Jaspers' thesis is an example for the continuing relevance of certain subjects in criminological discourse.

  2. "On cyclic insanity" by Karl Ludwig Kahlbaum, MD: a translation and commentary.

    Science.gov (United States)

    Baethge, Christopher; Salvatore, Paola; Baldessarini, Ross J

    2003-01-01

    Karl Ludwig Kahlbaum (1828-1899) spent most of his professional career as director of a private psychiatric sanatorium in Germany. He remains influential for introducing his "clinical method" (based on considering the course of an illness as well as the signs and symptoms) of differential diagnosis of specific psychiatric syndromes and urging abandonment of the more unitary views of psychotic disorders favored by the leading German academic theorists of his time. Kahlbaum's approach to nosology, detailed in an 1863 monograph and other works, strongly influenced Kraepelin's views. However, remarkably few of the important writings of this keen clinical observer are available in English translation. His seminal lecture-essay "On Cyclic Insanity" [Uber cyklisches Irresein] of 1882 is translated into English here for the first time, with comments about its place in the history of the evolution of the concept of bipolar disorder, including its position as a link between Falret's folie circulaire and Kraepelin's manic-depressive insanity.

  3. El huracán Karl: concepciones sobre su origen en una comunidad de Veracruz

    Directory of Open Access Journals (Sweden)

    Arturo Marinero Heredia

    2015-01-01

    Full Text Available Se analizan las concepciones e ideas de pobladores adultos sobre las afectaciones sufridas por el huracán Karl en 2010, en el municipio de La Antigua, Veracruz. Los datos se obtuvieron de entrevistas a informantes claves y grupos focales, además de la revisión de notas periodísticas. Se observa que las concepciones e ideas sobre el origen del desastre las adjudican a las fuerzas naturales, espirituales o religiosas sin reconocer la responsabilidad de las autoridades encargadas de elaborar políticas públicas en la materia y en la falta de previsión social y personal frente a sus devastadores efectos. Esta concepción dificulta la prevención, mantiene a la comunidad en situación de vulnerabilidad e impide o imposibilita la integración, la cohesión social y la acción colectiva.

  4. O modelo de Karl Popper sob a ótica das Ciências Sociais Aplicadas

    Directory of Open Access Journals (Sweden)

    Milton de Abreu Campanario

    2012-04-01

    Full Text Available DOI: http://dx.doi.org/10.5007/2175-8077.2012v14n32p124 Karl Popper é o principal filósofo da ciência na modernidade, disputando com Thomas Kuhn a primazia de interpretação do método científico. Claramente há diferentes visões para uma leitura desse importante autor que cunhou o método chamado de dedutivo com teste. O texto reconhece a relevância da visão de Karl Popperno desenvolvimento de trabalhos científicos das ciências exatas e biológicas, onde é amplamente aceita. No entanto, nota-se que essa formulação é pouco sistematizada na área das ciências sociais aplicadas. Este é um ensaio que busca resgatar a sua contribuição, numa tentativa de traduzir os conceitos por ele desenvolvidos de forma didática. Para tanto, será feita uma introdução aos fundamentos da ciência como forma específica de conhecimento, buscando contrastar os métodos dedutivo e indutivo e os procedimentos da ciência formal, básica e aplicada. Uma tentativa de classificar a formulação de proposições a serem testadas ou falseadas é feita com a utilização de diferentes critérios, utilizando exemplos da administração e da economia para ilustração.

  5. Readers and academic reading of Karl Marx (São Paulo, 1958-1964

    Directory of Open Access Journals (Sweden)

    Lidiane Soares Rodrigues

    2016-05-01

    Full Text Available Ideas, books and concepts of Karl Marx and various Marxist authors was incorporated into scientific and cultural institutions. It is one of the political sphere importation into the academic implying sense of speed in relation to its origins and gave to Marxism, through the practices of the agents of this transfer, support for their preservation, dissemination and transformation. Concurrently, there is the incorporation of these lines to the required reading of the humanities and the repertoire of cultivated layers. Examination of appropriations that academic and cultured elites made of Marx, situate them (such work and such elites, institutionally. This is what this article does. Arguing that the legitimacy of the uses of a tradition result not only of their intrinsic value, but the work oriented agents interested in it, is elected an exemplary experience for research. This article looks at two university groups initially focused on the study of Karl Marx's work, made in the late 1950. It begins by proposing a collective biography, the reading program and the various uses they made of them. To refine the analysis and proof the advocated method selects for vertical take, within a group (the first one and a discipline (sociology, two contrasting trajectories (Fernando Henrique Cardoso and Octavio Ianni and various forms Marxism (theoretical and empirical / dominant and dominated. Finally, it discusses the profits propitiated to have operated with three concepts of cultural sociology: habitus, « field » and « patterns of intention » – taken from the works of Pierre Bourdieu and Michael Baxandall.

  6. Charge characteristics of humic and fulvic acids: comparative analysis by colloid titration and potentiometric titration with continuous pK-distribution function model.

    Science.gov (United States)

    Bratskaya, S; Golikov, A; Lutsenko, T; Nesterova, O; Dudarchik, V

    2008-09-01

    Charge characteristics of humic and fulvic acids of a different origin (inshore soils, peat, marine sediments, and soil (lysimetric) waters) were evaluated by means of two alternative methods - colloid titration and potentiometric titration. In order to elucidate possible limitations of the colloid titration as an express method of analysis of low content of humic substances we monitored changes in acid-base properties and charge densities of humic substances with soil depth, fractionation, and origin. We have shown that both factors - strength of acidic groups and molecular weight distribution in humic and fulvic acids - can affect the reliability of colloid titration. Due to deviations from 1:1 stoichiometry in interactions of humic substances with polymeric cationic titrant, the colloid titration can underestimate total acidity (charge density) of humic substances with domination of weak acidic functional groups (pK>6) and high content of the fractions with molecular weight below 1kDa.

  7. Reflections on Sven-Eric Liedman’s Marx-Biography “A World to Win: The Life and Works of Karl Marx”

    OpenAIRE

    Christian Fuchs

    2018-01-01

    The English translation of Sven-Eric Liedman’s Marx-biography A World to Win: The Life and Works of Karl Marx was published two weeks before Marx’s bicentenary. This article presents reflections on Liedman’s book and asks how one should best write biographically about Marx. The paper compares Liedman’s biography to the Marx-biographies written by Jonathan Sperber (Karl Marx: A Nineteenth-Century Life) and Gareth Stedman-Jones (Karl Marx: Greatness and Illusion). A biography is a way of repeat...

  8. Thermometric titration in investigation of the formation of polyanions of molybdenum(VI), tungsten(VI), vanadium(V), and chromium (VI)-I: comparison of thermometric and potentiometric titration curves.

    Science.gov (United States)

    Kiba, N; Takeuchi, T

    1973-09-01

    A new twin-cell thermometric titrator has been devised and used for thermometric titration of solutions of sodium molybdate, sodium tungstate, sodium orthovanadate, ammonium metavanadate, and potassium chromate with perchloric acid. The thermometric titration curves were compared with corresponding pH-titration curves for elucidation of the reactions occurring in the titrations. Thermometric titrimetric methods have been developed for the determination of tungsten, vanadium and chromium.

  9. Who's Qualified? Seeing Race in Color-Blind Times: Lessons from Fisher v. University of Texas

    Science.gov (United States)

    Donnor, Jamel K.

    2015-01-01

    Using Howard Winant's racial dualism theory, this chapter explains how race was discursively operationalized in the recent U.S. Supreme Court higher education antiracial diversity case Fisher v. University of Texas at Austin.

  10. The Milky Way, the Local Group & the IR Tully-Fisher Diagram

    Science.gov (United States)

    Malhotra, S.; Spergel, D.; Rhoads, J.; Li, J.

    1996-01-01

    Using the near infrared fluxes of local group galaxies derived from Cosmic Background Explorer/Diffuse Infrared Background Experiment band maps and published Cepheid distances, we construct Tully-Fisher diagrams for the Local Group.

  11. Pediatric Miller Fisher Syndrome Complicating an Epstein-Barr Virus Infection.

    Science.gov (United States)

    Communal, Céline; Filleron, Anne; Baron-Joly, Sandrine; Salet, Randa; Tran, Tu-Anh

    2016-10-01

    Miller Fisher syndrome, a variant of Guillain-Barré syndrome, is an acute inflammatory demyelinating polyradiculoneuropathy that may occur weeks after a bacterial or viral infection. Campylobacter jejuni and Haemophilus influenzae are frequently reported etiological agents. We describe a boy with Miller Fisher syndrome following Epstein-002DBarr virus primary infectious mononucleosis. He presented with bilateral dysfunction of several cranial nerves and hyporeflexia of the limbs but without ataxia. Miller Fisher syndrome was confirmed by the presence of anti-GQ1b antibodies in a blood sample. Epstein-Barr virus was identified by polymerase chain reaction and serology. Epstein-Barr virus should be considered as a Miller Fisher syndrome's causative agent. The physiopathology of this condition may involve cross-reactive T-cells against Epstein-Barr virus antigens and gangliosides. Copyright © 2016 Elsevier Inc. All rights reserved.

  12. Fisher Sand & Gravel New Mexico, Inc. General Air Quality Permit: Related Documents

    Science.gov (United States)

    Documents related to the Fisher Sand & Gravel – New Mexico, Inc., Grey Mesa Gravel Pit General Air Quality Permit for New or Modified Minor Source Stone Quarrying, Crushing, and Screening Facilities in Indian Country.

  13. Quantum Fisher information on its own is not a valid measure of the coherence

    Science.gov (United States)

    Kwon, Hyukjoon; Tan, Kok Chuan; Choi, Seongjeon; Jeong, Hyunseok

    2018-06-01

    We show that contrary to the claim in Feng and Wei (2017), the quantum Fisher information itself is not a valid measure of the coherence based on the resource theory because it can increase via an incoherent operation.

  14. The Fisher Information Matrix as a Relevant Tool for Sensor Selection in Engine Health Monitoring

    Directory of Open Access Journals (Sweden)

    S. Borguet

    2008-01-01

    the essential elements of the sensor selection problem is defined from the Fisher information matrix. An example application consisting in a commercial turbofan engine illustrates the enhancement that can be expected from a wise selection of the sensor set.

  15. Travelling wavefronts of a generalized Fisher equation with spatio-temporal delay

    International Nuclear Information System (INIS)

    Jin Chunhua; Yin Jingxue; Wang Yifu

    2009-01-01

    We discuss a generalized Fisher equation with a convolution term which introduces a time-delay in the nonlinearity. Special attention is paid to the existence and the asymptotic behavior of travelling wavefronts connecting two uniform steady states.

  16. On the integrability of the generalized Fisher-type nonlinear diffusion equations

    International Nuclear Information System (INIS)

    Wang Dengshan; Zhang Zhifei

    2009-01-01

    In this paper, the geometric integrability and Lax integrability of the generalized Fisher-type nonlinear diffusion equations with modified diffusion in (1+1) and (2+1) dimensions are studied by the pseudo-spherical surface geometry method and prolongation technique. It is shown that the (1+1)-dimensional Fisher-type nonlinear diffusion equation is geometrically integrable in the sense of describing a pseudo-spherical surface of constant curvature -1 only for m = 2, and the generalized Fisher-type nonlinear diffusion equations in (1+1) and (2+1) dimensions are Lax integrable only for m = 2. This paper extends the results in Bindu et al 2001 (J. Phys. A: Math. Gen. 34 L689) and further provides the integrability information of (1+1)- and (2+1)-dimensional Fisher-type nonlinear diffusion equations for m = 2

  17. 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.

  18. A novel approach for high precision rapid potentiometric titrations: application to hydrazine assay.

    Science.gov (United States)

    Sahoo, P; Malathi, N; Ananthanarayanan, R; Praveen, K; Murali, N

    2011-11-01

    We propose a high precision rapid personal computer (PC) based potentiometric titration technique using a specially designed mini-cell to carry out redox titrations for assay of chemicals in quality control laboratories attached to industrial, R&D, and nuclear establishments. Using this technique a few microlitre of sample (50-100 μl) in a total volume of ~2 ml solution can be titrated and the waste generated after titration is extremely low comparing to that obtained from the conventional titration technique. The entire titration including online data acquisition followed by immediate offline analysis of data to get information about concentration of unknown sample is completed within a couple of minutes (about 2 min). This facility has been created using a new class of sensors, viz., pulsating sensors developed in-house. The basic concept in designing such instrument and the salient features of the titration device are presented in this paper. The performance of the titration facility was examined by conducting some of the high resolution redox titrations using dilute solutions--hydrazine against KIO(3) in HCl medium, Fe(II) against Ce(IV) and uranium using Davies-Gray method. The precision of titrations using this innovative approach lies between 0.048% and 1.0% relative standard deviation in different redox titrations. With the evolution of this rapid PC based titrator it was possible to develop a simple but high precision potentiometric titration technique for quick determination of hydrazine in nuclear fuel dissolver solution in the context of reprocessing of spent nuclear fuel in fast breeder reactors. © 2011 American Institute of Physics

  19. Rényi-Fisher entropy product as a marker of topological phase transitions

    Science.gov (United States)

    Bolívar, J. C.; Nagy, Ágnes; Romera, Elvira

    2018-05-01

    The combined Rényi-Fisher entropy product of electrons plus holes displays a minimum at the charge neutrality points. The Stam-Rényi difference and the Stam-Rényi uncertainty product of the electrons plus holes, show maxima at the charge neutrality points. Topological quantum numbers capable of detecting the topological insulator and the band insulator phases, are defined. Upper and lower bounds for the position and momentum space Rényi-Fisher entropy products are derived.

  20. Resources and estuarine health: Perceptions of elected officials and recreational fishers

    Energy Technology Data Exchange (ETDEWEB)

    Burger, J.; Sanchez, J.; McMahon, M.; Leonard, J.; Lord, C.G.; Ramos, R.; Gochfeld, M.

    1999-10-29

    It is important to understand the perceptions of user groups regarding both the health of their estuaries and environmental problems requiring management. Recreational fishers were interviewed to determine the perceptions of one of the traditional user groups of Barnegat Bay (New Jersey), and elected officials were interviewed to determine if the people charged with making decisions about environmental issues in the bay held similar perceptions. Although relative ratings were similar, there were significant differences in perceptions of the severity of environmental problems, and for the most part, public officials thought the problems were more severe than did the fishers. Personal watercraft (often called Jet Skis) were rated as the most severe problem, followed by chemical pollution, junk, over fishing, street runoff, and boat oil. Small boats, sailboats, wind surfers, and foraging birds were not considered environmental problems by either elected officials or fishermen. The disconnect between the perceptions of the recreational fishers and those of the locally elected public officials suggests that officials may be hearing from some of the more vocal people about problems, rather than from the typical fishers. Both groups felt there were decreases in some of the resources in the bay; over 50% felt the number of fish and crabs had declined, the size of fish and crabs had declined, and the number of turtles had declined. Among recreational fishers, there were almost no differences in perceptions of the severity of environmental problems or in changes in the bay. The problems that were rated the most severe were personal watercraft and over fishing by commercial fishers. Recreational fishers ranked sailboats, wind surfers, and fishing by birds as posing no problem for the bay. Most fishers felt there had been recent major changes in Barnegat Bay, with there now being fewer and smaller fish, fewer and smaller crabs, and fewer turtles. The results suggest that the