Search results for "Names"

The words of conjecture. Semiotics and epistemology in ancient medicine and rhetoric

2016

This article considers the epistemology of Classical rhetoric and Hippocratic medicine, focusing on two key terms: semeion and tekmerion. Through an analysis of the specific case of ancient Greek medicine and rhetoric, we hope to bring out the conjectural and fallible nature of human knowledge. The paper focuses on the epistemological and methodological affinity between these two ancient technai, and considers the medical uses of semeion and tekmerion in the light of their meaning in the rhetorical sphere. Chronologically, the analysis follows an inverse pathway: it starts from Aristotle and from Rhetorica ad Alexandrum, and then moves on to Antiphon’s texts (chosen as an exemplary case) an…

La problemática textual del comentario de Galeno al tratado hipocrático <em>Sobre los humores</em>

2014

The commentary to the Hippocratic treatise De humoribus, which was accepted as an authentic Galenic work till recent times, uses to be nowadays assigned to a mid-XVIth. century author of false ancient manuscripts, the Greek Andreas Darmarios. In spite of this, the text presents several kinds of problems that suggest a careful revisiting of the question. This article presents some of such problems and looks for a different explanation by means of the interaction of the languages involved in the transmission of the text.

Development of the filiform hairs on the cerci of Gryllus bimaculatus Deg. (Saltatoria, Gryllidae)

1978

The filiform hairs, mechanoreceptors of Gryllus, pass through six developmental stages during the last larval stage. The cytoplasm of their sense cells suggests intensive synthesis of protein for cellular metabolism and intercytoplasmic exchange of material via glial evaginations. Ultrahistochemical tests demonstrated acid phosphatase in the lysosomes as well as in components of the Golgi apparatus. There was no significant change in the appearance of the sense cell cytoplasm, indicating a maintained functional state also during molting. The new cuticular apparatus is formed after apolysis by the three enveloping cells. Formation of the replacement hairs is initiated by a cytoplasmic outgro…

Orientational analysis of planar fibre systems observed as a Poisson shot-noise process

2007

Summary We consider two-dimensional fibrous materials observed as a digital greyscale image. The problem addressed is to estimate the orientation distribution of unobservable thin fibres from a greyscale image modelled by a planar Poisson shot-noise process. The classical stereological approach is not straightforward, because the point intensities of thin fibres along sampling lines may not be observable. For such cases, Karkkainen et al. (2001) suggested the use of scaled variograms determined from grey values along sampling lines in several directions. Their method is based on the assumption that the proportion between the scaled variograms and point intensities in all directions of sampl…

Measuring (biological) materials mechanics with atomic force microscopy. 2. Influence of the loading rate and applied force (colloidal particles)

2020

Atomic force microscopy (AFM) is the most often used tool to study the mechanical properties of eukaryotic cells. Due to their complex assembly, cells show viscoelastic properties. When performing experiments, one has to consider the influence of both loading rate and maximum load on the measured mechanical properties. Here, we employed colloidal particles of various sizes (from 2 to 20 μm diameter) to perform force spectroscopy measurements on endothelial cells at loading rates varying from 0.1 to 50 μm/s, and maximum loads ranging from 1 to 25 nN. We were able to determine the non-linear dependence of cell viscoelastic properties on the loading rate which followed a weak power law. In add…

Antonius – Tenis un Antiņš. Ieskats latviešu personvārdu attīstībā

2015

Sāviena un tās senākie mājvārdi

2019

Valsts Kultūrkapitāla fonds

Einstein's Washington Manuscript on Unified Field Theory

2020

In this note, we point attention to and briefly discuss a curious manuscript of Einstein, composed in 1938 and entitled "Unified Field Theory," the only such writing, published or unpublished, carrying this title without any further specification. Apparently never intended for publication, the manuscript sheds light both on Einstein's modus operandi as well as on the public role of Einstein's later work on a unified field theory of gravitation and electromagnetism.

Application of micro Raman spectroscopy to industrial FC membranes

2007

Raman spectra of as-received and protonated membranes (Nafion® NRE-212, Fumapem® F-14100 and Fumasep® FAA) were measured with He-Cd and Ar laser. For the first time the Raman and IR spectra are reported of Fumasep membranes. Most of peaks in vibration spectra active in Raman and IR of membranes are interpreted with C-F, C-S, C-O-C, SO3, C-C bonds. The vibration region connected with protons and H-O bond in both types of membranes is found in Raman and IR spectra.

Bichromatic field propagation in a resonant medium: Floquet analysis

2011

We study the propagation of a bichromatic field in a resonant medium. The two modes of the incoming fields are pulsed and delayed with respect to each other. It is shown that in the course of the propagation, new Raman sidebands will be generated. The achievable frequency spacing between the sidebands is determined from experimental data. A numerical example is shown for realistic physical parameters.