101,949 research outputs found
Influence of keyboard layout and feedback type in eye-typing tasks: A comparative study
No full textWriting with a keyboard using only one's gaze, i.e., eye-typing has aroused researchers' interest in the last decades. Initial efforts aimed to provide a means of communication for people suffering from severe motor disabilities, while recently, the interest has expanded to target non-disabled people. The present paper examined the impact of the keyboard shape and type of feedback on writing performance and usability. More specifically, three keyboard shapes (i.e., QWERTY, ABCDE, and Circular) and three types of feedback (i.e., visual, audio, none) were investigated. Besides confirming the impact of visual feedback for successful performance in an eye-typing task, our results expand previous findings showing the advantages of deploying a circularly-shaped keyboard
Universality of dark matter haloes shape over six decades in mass: insights from the Millennium XXL and SBARBINE simulations
No full textFor the last 30 yr many observational and theoretical evidences have shown that galaxy clusters are not spherical objects, and that their shape is much better described by a triaxial geometry. With the advent of multiwavelength data of increasing quality, triaxial investigations of galaxy clusters is gathering a growing interest from the community, especially in the time of `precision cosmology'. In this work, we aim to provide the first statistically significant predictions in the unexplored mass range above 3 × 1014 M⊙h-1, using haloes from two redshift snapshots (z = 0 and z = 1) of the Millennium XXL simulation. The size of this cosmological dark matter-only simulation (4.1 Gpc) allows the formation of a statistically significant number of massive cluster scale haloes (≈500 with M > 2× 1015 M⊙ h-1, and 780 000 with M > 1014 M⊙ h-1). Besides, we aim to extend this investigation to lower masses in order to look for universal predictions across nearly six orders of magnitude in mass, from 1010 to almost 1016 M⊙ h-1. For this purpose we use the SBARBINE simulations, allowing us to model haloes of masses starting from ≈1010 M⊙ h-1. We use an elliptical overdensity method to select haloes and compute the shapes of the unimodal ones (approximately 50 per cent), while we discard the more unrelaxed. The minor to major and intermediate to major axis ratio distributions are found to be well described by simple universal functional forms that do not depend on cosmology or redshift. Our results extend the findings of Jing & Suto to a higher precision and a wider range of mass. This `recipe' is made available to the community in this paper and in a dedicated web page
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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No full textO presente trabalho teve o objetivo de avaliar doses crescentes do herbicida glyphosate, associado a diversos adjuvantes, no controle do rebrote do milheto (Pennisetum glaucum), visando redução de custos no sistema de semeadura direto, nas condições do Cerrado. A pesquisa foi conduzida em área de lavoura, sobre Latossolo Vermelho escuro, textura média, na Fazenda Bonamigo, município de Bandeirantes, Estado de Mato Grosso do Sul. Os tratamentos resultaram das combinações de oito doses de glyphosata, desde 90 glha até 720 g/ha do equivalente ácido (e.a.) ou 0,25 l/ha até 2,00 l/ha do produto comercial (p.c.), com acréscimo em cada intervalo de 90 g/ha (e.o.) ou 0,25 l/ha (p.c.). Para cada dose, o glyphosate foi testado isoladamente e adicionado de quatro tipos de adjuvantes: óleo mineral"Assist", óleo mineral"Glicol", óleo vegetal "Natur´lóleo" e surfatante"Herbitencil". O delineamento experimental adotado foi o de blocos casualizados, com parcelas subdivididas, com três repetições, perfazendo esquema fatorial 8 x 5 x 3, com o fator época em parcelas subdivididas. Após o uso do rolo-fogo na cultura do milheto, foi realizada a aplicação sobre o rebrote com idade de dezesseis dias. Os efeitos dos tratamentos foram avaliados em 2 épocas, 15 a 30 dias após a aplicação dos produtos, usando a escala de notas para avaliação visual do IAPAR. Os resultados obtidos mostraram que o acréscimo de adjuvantes não trouxe benefício no controle do rebrote do milheto, no|volume de calda trabalhado. O período de ação sobre o milheto abrange 30 dias, necessitando desse período para manifestar todo seu efeito. A dose adequada, ao controle do rebrote do milheto, foi próxima a 540 g/ha (e.a.) ou 1,50 l/ha (p.c.), sendo que a menor dose utilizada correspondente a 4,57 g/ha (c.a.a) ou 127 l/ha (p.c.), na mistura glyphosate +"Assist", proporcionou controle de 90%. As equações de regressão obtidos, para a glyphosate e adjuvantes, podem auxiliar no manejo do milheto, que devido as diferentes situações encontradas no Cerrado, necessita de instrumentos de apoio que proporcionem a escolha de doses adequadas a cada situaçãonot availabl
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No full textO presente trabalho teve o objetivo de avaliar doses crescentes do herbicida glyphosate, associado a diversos adjuvantes, no controle do rebrote do milheto (Pennisetum glaucum), visando redução de custos no sistema de semeadura direto, nas condições do Cerrado. A pesquisa foi conduzida em área de lavoura, sobre Latossolo Vermelho escuro, textura média, na Fazenda Bonamigo, município de Bandeirantes, Estado de Mato Grosso do Sul. Os tratamentos resultaram das combinações de oito doses de glyphosata, desde 90 glha até 720 g/ha do equivalente ácido (e.a.) ou 0,25 l/ha até 2,00 l/ha do produto comercial (p.c.), com acréscimo em cada intervalo de 90 g/ha (e.o.) ou 0,25 l/ha (p.c.). Para cada dose, o glyphosate foi testado isoladamente e adicionado de quatro tipos de adjuvantes: óleo mineral"Assist", óleo mineral"Glicol", óleo vegetal "Natur´lóleo" e surfatante"Herbitencil". O delineamento experimental adotado foi o de blocos casualizados, com parcelas subdivididas, com três repetições, perfazendo esquema fatorial 8 x 5 x 3, com o fator época em parcelas subdivididas. Após o uso do rolo-fogo na cultura do milheto, foi realizada a aplicação sobre o rebrote com idade de dezesseis dias. Os efeitos dos tratamentos foram avaliados em 2 épocas, 15 a 30 dias após a aplicação dos produtos, usando a escala de notas para avaliação visual do IAPAR. Os resultados obtidos mostraram que o acréscimo de adjuvantes não trouxe benefício no controle do rebrote do milheto, no|volume de calda trabalhado. O período de ação sobre o milheto abrange 30 dias, necessitando desse período para manifestar todo seu efeito. A dose adequada, ao controle do rebrote do milheto, foi próxima a 540 g/ha (e.a.) ou 1,50 l/ha (p.c.), sendo que a menor dose utilizada correspondente a 4,57 g/ha (c.a.a) ou 127 l/ha (p.c.), na mistura glyphosate +"Assist", proporcionou controle de 90%. As equações de regressão obtidos, para a glyphosate e adjuvantes, podem auxiliar no manejo do milheto, que devido as diferentes situações encontradas no Cerrado, necessita de instrumentos de apoio que proporcionem a escolha de doses adequadas a cada situaçãonot availabl
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
Activated FVII levels in factor VII Padua (Arg304Gln) coagulation disorder and in true factor VII deficiency: a study in homozygotes and heterozygotes
No full textCongenital FVII deficiency is usually subdivided into two forms: type I and type II. Type I is characterized by a concomitant deficiency of FVII activity and FVII antigen (true deficiency). Type II is characterized by a discrepancy between FVII activity which is always low and FVII antigen which may be normal, near normal, or reduced. Thromboplastins of different origins may show a discrepant behaviour towards type II FVII deficiencies. The abnormal factor VII present in these forms may, in fact show, different levels of activity, according to the thromboplastin used in the assay system. Typical of these variants is the Arg304Gln mutation (know as FVII Padua). In this variant, FVII level is low when rabbit brain thromboplastin is used, whereas the level is perfectly normal when ox-brain thromboplastin is employed. Intermediate levels are obtained if human placenta or human recombinant is used. Since ox-brain thromboplastin is very sensitive to activated FVII, the normal FVII levels obtained in FVII Padua could be due to abnormally high circulating levels of activated FVII. The purpose of the present paper was to investigate the level of activated FVII present in homozygotes and heterozygotes with FVII Padua. For comparison, a group of patients with type I or 'true' deficiency was also investigated. A group of 21 normal patients served as controls. The activated FVII level found in FVII Padua was 8.4 and 41.0 mU/ml for homozygotes and heterozygotes, respectively. The level found in homozygous true deficiency was unassayable, whereas that found in heterozygotes was 36.2 mU/ml. The level found in the control population was 64.9 mU/ml in agreement with other reports. The low levels of activated FVIIa found in homozygotes with FVII Padua indicate that the normal FVII activity found with ox-brain thromboplastin cannot be attributed to higher than normal circulating levels of FVIIa
The Right to Strike under the United States Constitution: Theory, Practice, and Possible Implications for Canada
No full textAnswering critics of the Canadian Supreme Court's judgment in B.C. Health, the author argues that the Court laid the foundation for a principled and durable doctrine protecting constitutional labour rights, one that goes directly to the heart of the matter — the inequality of workers’ power in the employment relation. In the author’s view, two paths could lead from B.C. Health to the recognition of Charter protec- tion for a right to strike: one that treats the right as an accessory to col- lective bargaining, and one that upholds the right directly on the basis of the Charter values of equality and participation. The author supports the latter approach, contending that constitutional rights should be defined in relation to fundamental values, in a way that is not contingent on time-bound or fact-sensitive assessments about the role of strikes within a particular collective bargaining regime. Although a Charter right to strike may involve the courts in difficult choices about when to defer to legislative policy decisions, and courts may lack the institutional capac- ity to deal effectively with labour law issues, the author points out that judges can look to ILO standards for expert guidance. Noting that the U.S. experience in this area might be of considerable use to Canadians, the author concludes by providing an overview of American case law concerning a constitutional right to strike.Peer reviewe
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