Aeroelastic Problems in connection with High-Speed Flight

1956 ◽  
Vol 60 (547) ◽  
pp. 459-475 ◽  
Author(s):  
E. G. Broadbent

SummaryA review is given of developments in the field of aeroelasticity during the past ten years. The effect of steadily increasing Mach number has been two-fold: on the one hand the aerodynamic derivatives have changed, and in some cases brought new problems, and on the other hand the design for higher Mach numbers has led to thinner aerofoils and more slender fuselages for which the required stiffness is more difficult to provide. Both these aspects are discussed, and various methods of attack on the problems are considered. The relative merits of stiffness, damping and massbalance for the prevention of control surface flutter are discussed. A brief mention is made of the recent problems of damage from jet efflux and of the possible aeroelastic effects of kinetic heating.

1943 ◽  
Vol 12 (1) ◽  
pp. 28-34
Author(s):  
Kenneth Scott Latourette

A strange contrast exists in the status of the Christian Church in the past seventy years. On the one hand the Church has clearly lost some of the ground which once appeared to be safely within its possession. On the other hand it has become more widely spread geographically and, when all mankind is taken into consideration, more influential in shaping human affairs than ever before in its history. In a paper as brief as this must of necessity be, space can be had only for the sketching of the broad outlines of this paradox and for suggesting a reason for it. If details were to be given, a large volume would be required. Perhaps, however, we can hope to do enough to point out one of the most provocative and important set of movements in recent history.


2021 ◽  
Vol 90 ◽  
pp. 105-123
Author(s):  
Thaddeus Metz

AbstractOn the rise over the past 20 years has been ‘moderate supernaturalism’, the view that while a meaningful life is possible in a world without God or a soul, a much greater meaning would be possible only in a world with them. William Lane Craig can be read as providing an important argument for a version of this view, according to which only with God and a soul could our lives have an eternal, as opposed to temporally limited, significance since we would then be held accountable for our decisions affecting others’ lives. I present two major objections to this position. On the one hand, I contend that if God existed and we had souls that lived forever, then, in fact, all our lives would turn out the same. On the other hand, I maintain that, if this objection is wrong, so that our moral choices would indeed make an ultimate difference and thereby confer an eternal significance on our lives (only) in a supernatural realm, then Craig could not capture the view, aptly held by moderate supernaturalists, that a meaningful life is possible in a purely natural world.


Literator ◽  
1993 ◽  
Vol 14 (1) ◽  
pp. 99-106
Author(s):  
B. Hendrickx

The Byzantine akritic poem, "The Death of Digenis", which manifests all the characteristics of the Byzantine Neo-Hellenic tragoudi, is a good exemplum of an epic song, where mystification (in its anthropological sense) is used to idealize the hero. Historically the akritic songs (9th - 13th cent. A.D.) refer to the ongoing war on Byzantium’s frontiers between the Christian defenders of the empire and the Moslem invaders. The poem's structure, its historical-epic elements and especially its symbolism are examined in this article. It thus becomes clear that the unknown poet juxtaposes present, past and future in such a way that Digenis’s heroic (but human) exploits of the past are integrated in a supernatural climax, where the hero in his struggle loses to Charon (Death - Archangel Michael). Consequently Digenis, whose name means ‘bom twice', complies on the one hand with the tragic destiny of an epic death, and on the other hand passes through a kind of initiation ritual into the Christian host of the heroes of Heaven.


Author(s):  
Mickaël Labbé

Résumé: La notion d’« espace indicible » occupe sans conteste une position centrale dans la théorie architecturale de Le Corbusier après 1945. Loin d’être un simple mot-valise ou un signifiant vide de sens, le concept d’espace indicible vise à penser le sommet de l’expérience esthétique et spirituelle dont est passible l’architecture, cela tant pour rendre compte de l’émotion plastique ressentie face aux chefs-d’œuvre du passé que pour décrire la qualité de l’expérience que l’architecte cherche à produire par ses propres œuvres. Ainsi, dans l’œuvre de Le Corbusier, l’expression « l’espace indicible » désigne non seulement un concept, mais également un ensemble textuel dans lequel la notion est thématisée et au travers duquel elle se constitue progressivement. L’objectif de cet article est double : d’une part, proposer une description des déterminations principales du contenu donné par Le Corbusier à la notion d’« espace indicible » ; d’autre part, à partir de l’examen des archives, faire le point sur les textes dans lesquels ce concept se formule. Abstract: The concept of “ineffable space” unquestionably occupies a central place in Le Corbusier's architectural theory after 1945. Far from being a portmanteau or a signifier devoid of meaning, the concept of ineffable space is aimed at conceiving the height of aesthetic and spiritual experience rendered possible by architecture. This is as much to realise plastic emotion felt in front of masterpiece from the past as to describe the experiential quality that the architect seeks to produce in his/her own work. Thus, in Le Corbusier’s oeuvre, the expression “ineffable space” not only denotes a concept but also a textual whole in which the concept is thematised and through which it is progressively constituted. The aim of this article is two-fold. On the one hand, I propose a description of the principle determinants of the content that Le Corbusier assigns to the concept of “ineffable space”, and on the other hand, analysing the archives, I wish to take stock of the texts in which this concept is formulated.  Mots-clés: Le Corbusier; espace indicible; théorie architecturale. Keywords: Le Corbusier; ineffable space; architectural theory. DOI: http://dx.doi.org/10.4995/LC2015.2015.470


Author(s):  
Andrea Possamai

The present essay aims, on the one hand, to recall the reasons of anti-naturalism, intended in a metaphysical perspective, of a large part of medieval philosophical and theological reflection and, on the other hand, to show how the same type of problems, specifically those concerning the possible mutability or immutability of the past, can be employed in favour of various conflicting positions on the matter. To demonstrate this, reference was made to some thinkers who could represent emblematic positions on the theme, in particular: Pliny the Elder for the ancient world, Augustine of Hippo, Peter Damian, Bonaventure and Thomas Aquinas for the medieval era.


2018 ◽  
Vol 71 (2) ◽  
pp. 142-160
Author(s):  
Jaime Gómez de Caso Zuriaga

Abstract The aim of the present contribution is twofold. On the one hand we shall discuss the background of some Islamic legends about places and wondrous objects – holy relics of the past – that had once been in the possession of the Gothic monarchy by inheritance, but were subsequently lost or looted out of al-Andalus by the Muslim leaders. On the other hand our study is concerned with the relationship between the content of the legends in question and the “loss of Spain” in a more general sense, i.e. not only the loss of these objects by the Christian Goths subsequent to their loss of power in Spain, but also their disappearance from Muslim ownership. Besides, the legends possess a moral core, which is interesting in its own right: the way in which they are viewed in the Muslim sources, the locations and objects they describe, and their relationship to the Gothic monarchy may provide the modern reader with an insight into the striking vision of the past held by the invading Muslim culture.


2004 ◽  
Vol 38 (2) ◽  
pp. 175-185
Author(s):  
Karim Gillani

Ginan bolore nit nure bharea;Evo haide tamare harakh na maeji.Recite continually theginanswhich are filled with light;Boundless will be the joy in your heart.Ginansare devotional songs rooted in the musical and poetic matrix of Indian culture. The term “ginan” carries a double significance: on the one hand, it means “religious knowledge” or “wisdom,” analogous to the Sanskrit wordjnana(knowledge). On the other hand, it means “song” or “recitation,” suggesting a link to the Arabicghannaand the Urdu/Hindighana, both verbs meaning “to sing.” For the past seven hundred years, Ismailis from the Indian subcontinent (Satpanth Khoja Ismailis) have been recitingginansas a part of their daily religious devotions at the congregational hall (Jamat Khana).


1958 ◽  
Vol 20 (3) ◽  
pp. 275-288 ◽  
Author(s):  
Paul H. Nitze

In the context of government, what do we mean by the phrase “a learned man”?* I take it we can mean a variety of things. On the one hand, we can have in mind the specialist, the expert, the man with an intensive and specialized background in a particular field of knowledge. On the other hand, we can have in mind the man with general wisdom, with that feeling for the past and the future which enriches a sense for the present, and with that appreciation for wider loyalties which deepens patriotism to one's country and finds bonds between it and Western culture and links with the universal aspirations of mankind.


2021 ◽  
Vol 45 (1) ◽  
pp. 21
Author(s):  
Robert Möller ◽  
Stephan Elspaß

<p>Although dialect use has declined massively over the past 100 years in large parts of the German-speaking countries, there is still a considerable areal diversity overall. Even the written standard language is characterised by diatopic heterogeneity on various levels – pronunciation, lexis, grammar, pragmatics. This is even more true for spoken everyday language, which, depending on the country and area, may be more dialectal, regiolectal, or near-standard in the German-speaking countries. This paper focuses on lexical variation and presents data from the <em>Atlas zur deutschen Alltagssprache </em>(AdA) from online surveys conducted over the last 17 years; some of these data is compared with older data from the <em>Wortatlas der deutschen Umgangssprachen</em> (WDU) collected in the 1970s. The approx. 600 maps of the AdA produced so far document, on the one hand, a surprisingly clear preservation of older regional contrasts in the distribution of diatopic variants, as already known from earlier dialect atlases. On the other hand, the AdA maps show a multitude of newer cases of regional diversity, which were hardly or not at all known before and which are thus not listed in codices or studies on the lexis of contemporary German. The paper shows that even variants for modern concepts are often not uniform across regions but can have distinct regional emphases. Finally, the question of dominant areal structures in present-day lexical variation of German will be addressed.</p>


2019 ◽  
Vol 23 (2) ◽  
pp. 414-426
Author(s):  
Samuel Bidaud

Proust and Hergé: on some similarities between À la Recherche du temps perdu and Les Aventures de Tintin. Part II. This article forms the second part of our study, whose first part was published in Interlitteraria’s previous issue. We have already underlined that Proust and Hergé both adopt the principle of the return of the characters, that their works attach a great importance to the imaginary of space and that their characters use language very specifically. We continue this comparison between Proust and Hergé, focusing here on the problem of time and temporality in À la recherche du temps perdu and Les Aventures de Tintin. Time, in Proust’s Recherche, is essentially internal and defined by the juxtaposition of different moments of the narrator’s life, whereas in Tintin temporality is linear and logical on the one hand, and cyclical and immobile on the other hand. Moreover, while the past of Proust’s narrator is fundamental, Tintin seems to have no past. Proust and Hergé, eventually, focus on the problem of lost and regained time, to which they propose two different answers.


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