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Papers by Alex Blum
Zeitschrift für Mathematische Logik und Grundlagen der Mathematik, 1972
Proof. By corollary 1, K with one dyadic predicate letter is undecidable. By
The influence of layer charge and charge distribution of dioctahedral smectites on the rheologica... more The influence of layer charge and charge distribution of dioctahedral smectites on the rheological and swelling properties of bentonites is examined. Layer charge and charge distribution were determined by XRD using the LayerCharge program . Determination of layer charge characteristics of smectites. Clays Clay Miner. 51, 644-655.]. The rheological properties were determined, after sodium exchange using the optimum amount of Na 2 CO 3 , from free swelling tests. Rheological properties were determined using 6.42% suspensions according to industrial practice. In smectites with layer charges of − 0.425 to − 0.470 per half formula unit (phfu), layer charge is inversely correlated with free swelling, viscosity, gel strength, yield strength and thixotropic behaviour. In these smectites, the rheological properties are directly associated with the proportion of low charge layers. By contrast, in low charge and high charge smectites there is no systematic relation between layer charge or the proportion of low charge layers and rheological properties. However, low charge smectites yield more viscous suspensions and swell more than high charge smectites. The rheological properties of bentonites also are affected by the proportion of tetrahedral charge (i.e. beidellitic charge), by the existence of fine-grained minerals having clay size, such as opal-CT and to a lesser degree by the ionic strength and the pH of the suspension. A new method for classification of smectites according to the layer charge based on the XRD characteristics of smecites is proposed, that also is consistent with variations in rheological properties. In this classification scheme the term smectites with intermediate layer charge is proposed.
The British Journal for the Philosophy of Science, 1989
The British Journal for the Philosophy of Science, 1970
Sophia, 2005
... ON THE CANNOT OF INFALLIBILITY ALEX BLUM Department of Philosophy, Bar-Ilan University Ramat-... more ... ON THE CANNOT OF INFALLIBILITY ALEX BLUM Department of Philosophy, Bar-Ilan University Ramat-Gan 52900, lsrael blumal@mail.biu.ac.il ... The argument is seductive but the crucial distinction it invokes is spuri-OTIS. The argument may be formulated as follows: ...
Philosophical Studies, 1971
... VOLUME XXII Contents April 1971 NU~mgg 3 St)dais and Paradox by Alex Blum, BAR-ILAN UNIVERSIT... more ... VOLUME XXII Contents April 1971 NU~mgg 3 St)dais and Paradox by Alex Blum, BAR-ILAN UNIVERSITY On Semantic Interpretation of Truth-Functions by Aaron Snyder, UNIVERSITY OF WISCONSIN A Note on Deontie Distributivity by Philip Mullock, ~.RCEa UNIVERSITY ...
Philosophical Investigations, 1989
Philosophical Investigations, 2011
Zeitschrift für Mathematische Logik und Grundlagen der Mathematik, 1972
Proof. By corollary 1, K with one dyadic predicate letter is undecidable. By
The influence of layer charge and charge distribution of dioctahedral smectites on the rheologica... more The influence of layer charge and charge distribution of dioctahedral smectites on the rheological and swelling properties of bentonites is examined. Layer charge and charge distribution were determined by XRD using the LayerCharge program . Determination of layer charge characteristics of smectites. Clays Clay Miner. 51, 644-655.]. The rheological properties were determined, after sodium exchange using the optimum amount of Na 2 CO 3 , from free swelling tests. Rheological properties were determined using 6.42% suspensions according to industrial practice. In smectites with layer charges of − 0.425 to − 0.470 per half formula unit (phfu), layer charge is inversely correlated with free swelling, viscosity, gel strength, yield strength and thixotropic behaviour. In these smectites, the rheological properties are directly associated with the proportion of low charge layers. By contrast, in low charge and high charge smectites there is no systematic relation between layer charge or the proportion of low charge layers and rheological properties. However, low charge smectites yield more viscous suspensions and swell more than high charge smectites. The rheological properties of bentonites also are affected by the proportion of tetrahedral charge (i.e. beidellitic charge), by the existence of fine-grained minerals having clay size, such as opal-CT and to a lesser degree by the ionic strength and the pH of the suspension. A new method for classification of smectites according to the layer charge based on the XRD characteristics of smecites is proposed, that also is consistent with variations in rheological properties. In this classification scheme the term smectites with intermediate layer charge is proposed.
The British Journal for the Philosophy of Science, 1989
The British Journal for the Philosophy of Science, 1970
Sophia, 2005
... ON THE CANNOT OF INFALLIBILITY ALEX BLUM Department of Philosophy, Bar-Ilan University Ramat-... more ... ON THE CANNOT OF INFALLIBILITY ALEX BLUM Department of Philosophy, Bar-Ilan University Ramat-Gan 52900, lsrael blumal@mail.biu.ac.il ... The argument is seductive but the crucial distinction it invokes is spuri-OTIS. The argument may be formulated as follows: ...
Philosophical Studies, 1971
... VOLUME XXII Contents April 1971 NU~mgg 3 St)dais and Paradox by Alex Blum, BAR-ILAN UNIVERSIT... more ... VOLUME XXII Contents April 1971 NU~mgg 3 St)dais and Paradox by Alex Blum, BAR-ILAN UNIVERSITY On Semantic Interpretation of Truth-Functions by Aaron Snyder, UNIVERSITY OF WISCONSIN A Note on Deontie Distributivity by Philip Mullock, ~.RCEa UNIVERSITY ...
Philosophical Investigations, 1989
Philosophical Investigations, 2011