Quantitative evaluation of polymer gel dosimeters by broadband ultrasound attenuation

Ultrasound has been examined previously as an alternative readout method for irradiated polymer gel dosimeters, with authors reporting varying dose response to ultrasound transmission measurements. In this current work we extend previous work to measure the broadband ultrasound attenuation (BUA) response of irradiated PAGAT gel dosimeters, using a novel ultrasound computed tomography system

Philosophia between Greek and Roman culture:Naturalized immigrant or eternal stranger?

This chapter argues that comparison of Greek and Roman perceptions of philosophy in the early centuries AD reveals both divergences and similarities. Philosophia in this period remained on several levels a primarily Greek phenomenon, perceived as such by Greeks and Romans alike, and was thus naturally implicated in negotiations of identity and difference; it could be used both (by Greeks) as a touchstone of true civilization and (by Romans) as a marker of pointless over-refinement. But this apparently straightforward Greek-Roman split may in fact mask a deeper similarity; seen from another angle, Roman manoeuvrings over philosophy do not contest Greek approaches, but simply repeat them with local variations

With All Due Respect to Plato:The <i>Platonic Orations</i> of Aelius Aristides

This article offers a fresh analysis of the tone and argumentative strategies of Orations 2–4 of Aelius Aristides. It suggests that they are a more hostile and destructive exercise than is normally allowed for and that the recent critical consensus that they represent essentially an effort to reconcile philosophy and oratory needs substantial revision; these Orations testify instead to the continuing awkwardness of Plato and philosophy as components of the Greek cultural heritage in the Imperial period, as well as to the ambition of Aristides’ own strategies of self-presentation.</p

Crystallization and melting studies of branched isotactic polypropylenes

Crystallization, melting and structural studies were conducted on iostactic polypropylenes treated with varying dosages of electron beam radiation and an untreated iPP. Through FTIR methods, all specimens were found to be greater than 99% isotactic. Crystallization and melting studies were performed using light depolarizing microscopy (LDM) and other melting experiments were conducted using differential scanning calorimetry (DSC). Structural studies were conducted by use of a wide-angle x-ray diffractometer (WAXD). Through isothermal crystallization studies it was found that at the highest supercoolings all specimens had approximately the same half-time of crystallization values, t½, attributed to increased nucleation by increased supercooling. At higher temperatures of crystallization, Tc, it was observed that t½ varied for the specimens. This was attributed to the effects of branching on primary nucleation and to the size of the spherulites. All specimens were observed to nucleate in the heterogeneous mode, meaning that nuclei density stayed constant throughout the isothermal crystallization process. Average spherulite growth geometry (Avrami) exponent, n, values were in the range of 2.2 and 2.5. These low values were a consequence of the amount of branching and stereoregularity of the polymer chains and secondary crystallization. The spherulite growth rates, k, for all the samples decreased with decreasing supercooling, resulting from the decrease in the number of nuclei forming into spherulites. Through x-ray studies the predominant crystal form was found to be of the α modification, with some β and γ modifications observed. No structural changes at the crystal lattice level were detected. The degree of crystallization was seen to decrease as a result of increased branching in the treated specimens and attributed to thermal degradation in the untreated one. From the DSC endotherms small melting peaks in the range of 140 °C to approximately 145 °C was noticed in some of the specimens and attributed to the β modification as a consequence of nucleating agent(s) and stresses induced during sample film preparations. The equilibrium melting points taken from the highest peak and the return to baseline of the endothermic curves showed that the treated samples had lower points than the untreated one. This was due to branching and degradation from the irradiation process. The melting ranges of the treated specimens were shifted to lower values as compared to the untreated specimen, as a consequence of branching and degradation The temperature ranges for the irradiated specimens were broader than the melt range of the untreated sample The α peak also showed broadening as a result of branching

Beiträge und Stellungnahmen zu Problemen der Währungspolitik

Als Mittel der Preispolitik, zur Dämpfung der Preissteigerungserwartungen und zur Korrektur der Vorstellungen über die durchsetzbaren Lohnerhöhungen ist eine gleitende Aufwertung diskutabel, auch wenn kein fundamentales Ungleichgewicht in der Zahlungsbilanz besteht. (G. Fels, H. Giersch, H. Müller-Groeling, K. D. Schmidt) Wenn durchgreifende binnenwirtschaftliche Maßnahmen, die geeignet sind, die Preisflexibilität zu erhöhen und den Anbieterwettbewerb zu verstärken, nicht zur Verfügung stehen, bleibt nur die Möglichkeit, den Preiswettbewerb von außen durch wechselkurspolitische Maßnahmen zu intensivieren. (Gemeinschaftsdiagnose wirtschaftswissenschaftlicher Forschungsinstitute) Im Interesse des internationalen Währungssystems befürworten in- und ausländische Nationalökonomen eine marktwirtschaftliche Lösung der Währungsprobleme durch Freigabe des Wechselkurses; sie warnen vor administrativen Beschränkungen des freien Zahlungsverkehrs. Wer - bei binnenwirtschaftlicher Stabilitätspolitik - eine Rückkehr zur alten Dollarparität befürwortet, macht es den Gewerkschaften unmöglich, auf eine stabilisierungskonforme Lohnpolitik umzuschalten. (Herbert Giersch) Das Versprechen einer Rückkehr zur alten Parität ist genau das Gegenteil dessen, was die gegenwärtige Situation in der Bundesrepublik erfordert. (Gottfried Haberler) Der flexible DM-Kurs kann nur dann wirkungsvoll zu einer Stabilisierung ohne Stagnation beitragen, wenn sich Bundesregierung und Bundesbank zu einer allmählichen Aufwertung der DM bekennen. (H.-M. Stahl, P. Trapp) Die Währungsintegration in Europa sollte durch Einführung einer Rechnungseinheit mit konstanter Kaufkraft vorangetrieben werden; sobald es eine europäische Regierung und Zentralbank gibt, kann die Rechnungseinheit als Zahlungsmittel dienen und die nationalen Währungen ablösen. (Carl Christian von Weizsäcker) Bewegliche Wechselkurse können wettbewerbsneutral sein und deshalb dazu beitragen, daß in außenhandelsintensiven Unternehmen der Gewinn mehr durch die Leistung als durch die währungspolitischen Bedingungen bestimmt wird. (Herbert Giersch) --

An Investigation into the Prevalence, Quantification, and Survival of Escherichia coli in Stormwater Basin Sediment of Withers Swash, Myrtle Beach, SC

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Managemen

Pronounced Self‐Induced Diastereomeric Anisochronism in Anisidine Amino Acid Diamides

The emergent properties resulting from selective supramolecular interactions are of significant importance for materials and chemical systems. For the directed use of such properties, a fundamental understanding of the interaction mechanism and the resulting mode of function is necessary for a tailored design. The self-induced diastereomeric anisochronism effect (SIDA), which occurs in the intermolecular interaction of chiral molecules, generates unique properties such as chiral self-recognition and nonlinear effects. Here we show that anisidine amino acid diamides lead to extraordinary signal splitting in NMR spectra through supramolecular interaction and homochiral self-recognition. By systematic experiments we have investigated the underlying SIDA effect, explored its limits and finally successfully utilized it in the determination of enantiomeric ratios by NMR spectroscopy of chiral ‘SIDA-inactive’ compounds such as thalidomide

Frédéric Fauquier, Brigitte Pérez-Jean (éd.), Maxime de Tyr, entre rhétorique et philosophie au iie siècle de notre ère

Whole books devoted to the second-century philosophical (Platonist) orator Maximus of Tyre are not all that frequent, so when one does appear it is well worth pausing to ask what one might ideally hope from it. What are the really important questions to ask about his forty-one surviving discourses (‘dialexeis’), and how they can best be used to illuminate the larger issues that we care about in the thought and culture of the ancient world (or at least, the thought and culture of the Greek-spe..

Application of qPCR Technologies in Stormwater Source Tracking and Determination of Host Contributions of Fecal Indicator Bacteria

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Managemen