An analogue computer for network analyzer stability studies

An electro-mechanical analogue computer has been described which simulates in conjunction with the 10-kc power amplifiers in the Network Analyzer the rotor inertia and the governor of a synchronous generator. The computer eliminates the need of tedious, time-consuming, step-by-step calculations in a transient stability problem and makes possible a more accurate analysis;The computer requires further development in order to maximize its capabilities and broaden the scope of inquiry possible with it. The application of the computer to non-linear problems outside the power system field is desirable and should be investigated

The sensitivity of cells to the lethal action of X-rays

This thesis consists of three papers which record an experimental investigation into the nature of the biological action of X-rays. An introduction has been added in order to correlate the papers with each other and to draw attention to the significance of the experiments described in the papers in relation to the records of work by other investigators.Part I. Introduction. • Part II. The Biological Action of Homogeneous and Heterogeneous X-rays. Proc. Roy. Soc. 1933. B.112, 365. • Part III. The Action of X-rays on the Eggs of Calliphora. Proc. Roy. Soc. B. 1934. In press. • Part IV. The influence of temperature on the sensitivity of calliphorine eggs to X-rays. (This paper is about to be submitted to the Royal Society for publication)

Alien Registration- Melville, Charles W. (Houlton, Aroostook County)

https://digitalmaine.com/alien_docs/34785/thumbnail.jp

Metascientific aspects of topoi of spaces

This thesis presents a study of the importance of topoi for Science. It is argued that whenever the concept of space enters the practice of Science then formal (mathematical) theories should be interpreted in a topos of spaces. It is claimed that these topoi encode knowledge of space arising directly out of the needs of Science, in that the constitutive questions of the Sciences can be traced back to their leading knowledge interests and these determine the role of mathematics as a methodical device. In the Natural Sciences the constitutive questions involve the study of non-intentional objects, in terms of a causal nexus to be explained geometrically, and this facilitates the introduction of geometric objects as the methodical device for posing questions to Nature. Although the study of intentional subjects in the Human Sciences requires ordinary language, not mathematics, to pose questions to each other, secondary methodological objectifications permit a conception of geometric objects analogous to that of the Natural Sciences. Lawvere*s axioms for the gros and petit topoi illustrate attempts to formalise the idea of topoi of spaces, as a rational reconstruction of categories in which geometric objects satisfying the formal theories of Science can be found. The catalysing function of this knowledge of topoi of spaces can lead to a diagnosis of mathematical difficulties caused by a failure to align mathematical conceptions with these topoi. This is illustrated through Varela's use of self-reference in Biology and Atkin's use of algebraic topology in Social Studies

Juġrāfiyā-yi Ḥāfiẓ Abrū. Vols. II and III. Éd. Ṣādeq Sajjādī, Tehrān, Āyīna-yi Mīrāṯ, 1999, p. 373, 324, indexes des vols. I-III.

The appearance of the second and third volumes of Ḥāfiẓ Abrū’s massive historical geography only two years after the first is very welcome, particularly as these contain some of the most important sections of the work. Volume II has chapters on Armenia and northern Mesopotamia, Iraq, Ḫuzistān and Fārs. The format is approximately the same for each section, a general brief description of the province giving way to an account of its main towns, and the distances separating them. Sometimes only..

Juġrāfiyā-yi Ḥāfiẓ Abrū. Vols. II and III. Éd. Ṣādeq Sajjādī, Tehrān, Āyīna-yi Mīrāṯ, 1999, p. 373, 324, indexes des vols. I-III.

The appearance of the second and third volumes of Ḥāfiẓ Abrū’s massive historical geography only two years after the first is very welcome, particularly as these contain some of the most important sections of the work. Volume II has chapters on Armenia and northern Mesopotamia, Iraq, Ḫuzistān and Fārs. The format is approximately the same for each section, a general brief description of the province giving way to an account of its main towns, and the distances separating them. Sometimes only..

Ravābeṭ-e siyāsī-ye salājeqe-ye rūm bā īlḫānān. Tehrān, Amīr Kabīr, 1381/2002, 193 p. plus maps, tables and figures.

The book begins with lengthy introductory sections on the Seljuks and the rise of the Mongols, so that the first references to Seljuk contacts with the Mongols (in 629/1232) comes only on page 87. Before then, the author rightly stresses the lack of unity among the Muslims and the damage (material and psychological) done by the rival ambitions of various rulers in northwest Iran, northern Syria and eastern Anatolia, which made Anatolia so vulnerable to the Mongols. The narrative essentially f..

Ravābeṭ-e siyāsī-ye salājeqe-ye rūm bā īlḫānān. Tehrān, Amīr Kabīr, 1381/2002, 193 p. plus maps, tables and figures.

The book begins with lengthy introductory sections on the Seljuks and the rise of the Mongols, so that the first references to Seljuk contacts with the Mongols (in 629/1232) comes only on page 87. Before then, the author rightly stresses the lack of unity among the Muslims and the damage (material and psychological) done by the rival ambitions of various rulers in northwest Iran, northern Syria and eastern Anatolia, which made Anatolia so vulnerable to the Mongols. The narrative essentially f..

A weak lensing study of the Coma cluster

Due to observational constraints, dark matter determinations in nearby clusters based on weak lensing are still extremely rare, in spite of their importance for the determination of cluster properties independent of other methods. We present a weak lensing study of the Coma cluster (redshift 0.024) based on deep images obtained at the CFHT. After obtaining photometric redshifts for the galaxies in our field based on deep images in the u (1x1 deg2), and in the B, V, R and I bands (42'x52'), allowing us to eliminate foreground galaxies, we apply weak lensing calculations on shape measurements performed in the u image. We derive a map of the mass distribution in Coma, as well as the radial shear profile, and the mass and concentration parameter at various radii. We obtain M_200c = 5.1+4.3-2.1 x10^14 Msun and c_200c=5.0+3.2-2.5, in good agreement with previous measurements. With deep wide field images it is now possible to analyze nearby clusters with weak lensing techniques, thus opening a broad new field of investigation

The taxonomy and biology of Chlamydogobius eremius (Zietz, 1896)

Thesis (MSc) -- University of Adelaide, Dept. of Zoology, 197