Enhancing Aerodynamic Performance of Vertical Stabilizers through Leading Edge Modifications: A CFD Analysis

This research paper presents a meticulous investigation that was conducted by the authors for the effects of variable length V-shaped leading-edge morphing on drag reduction in NACA 0012 vertical stabilizers. This study aimed at enhancing the aerodynamic performance of these critical aircraft components under transonic conditions. Employing computational fluid dynamics (CFD) analysis, the researchers explored the potential of V-shaped leading- edge morphing in improving the overall aerodynamic efficiency. Through systematic simulations and rigorous analysis, the researchers were able to provide valuable insights into the effects of different leading-edge lengths and angles of attack on drag coefficients and lift performance. While the outcomes did not yield a significant reduction in drag, this research significantly contributes to the ongoing exploration of innovative techniques in aerodynamics for mitigating drag penalties in vertical stabilizers

Time as a Dimension of Byzantine Identity

The notion of identity (tautotes) was discussed, often in contrast to its opposite “otherness” (heterotes), not only during Classical Antiquity but also by Christian and Byzantine authors since Late Antiquity. Fundamental manifestations of every dimension of Byzantine identity – and in particular of collective identity – are language (including culture), religious (and political) commitment, space and time; these phenomena are deeply rooted in human consciousness. This paper deals with the relation between identity and time (temporality). This relation is analysed on the basis of key terms like aion, kairos and chronos and the relations among them; the individualization of temporality becomes manifest in combinations of the mentioned terms with adjectives like emos or hemeteros. Not surprisingly, Byzantine authors – referring to passages in the Old and the New Testament – dealt mainly with eschatological (cosmic) time in relation to individual and collective identity, whereas the interest in the historical dimension of time was limited to authors of a small educated class

Agriculture on Both Sides of the City Walls: The Vegetable Supply of Constantinople According to the Geoponika

The supply of everyday food for the great mass of the population of the Byzantine Empire changed over the period of more than a millennium, though slowly. It depended on the geological and climatic conditions of agriculture, which – within a territory extending over up to roughly 1.5 million km2 in the Middle Byzantine period – differed from region to region. Constantinople, from the fourth to the fifteenth century the capital of the Byzantine Empire, and subsequently until the early twentieth century that of the Ottoman Empire, was a special case: it was a megalopolis. Constantinople could not rely on its hinterland alone and therefore had to develop a system of logistics, in which transportation depended among other factors on the durability of the foodstuffs. Fresh or preserved (salted) vegetables, pulses, olives, and fruits constituted an important proportion of everyday food not only during Lent, but throughout the year (though many fresh vegetables and fruits were only available seasonally). Chapter 12.1 of the Geoponika, a tenth-century collection of agricultural lore, provides “Information about what is sown and what is planted out (or replanted) month by month in the latitude of Constantinople” (title). The contents of this source and its significance for our knowledge of farming in and near Constantinople are discussed in this paper.The supply of everyday food for the great mass of the population of the Byzantine Empire changed over the period of more than a millennium, though slowly. It depended on the geological and climatic conditions of agriculture, which – within a territory extending over up to roughly 1.5 million km2 in the Middle Byzantine period – differed from region to region. Constantinople, from the fourth to the fifteenth century the capital of the Byzantine Empire, and subsequently until the early twentieth century that of the Ottoman Empire, was a special case: it was a megalopolis. Constantinople could not rely on its hinterland alone and therefore had to develop a system of logistics, in which transportation depended among other factors on the durability of the foodstuffs. Fresh or preserved (salted) vegetables, pulses, olives, and fruits constituted an important proportion of everyday food not only during Lent, but throughout the year (though many fresh vegetables and fruits were only available seasonally). Chapter 12.1 of the Geoponika, a tenth-century collection of agricultural lore, provides “Information about what is sown and what is planted out (or replanted) month by month in the latitude of Constantinople” (title). The contents of this source and its significance for our knowledge of farming in and near Constantinople are discussed in this paper

Physics 422 Spring 2023 Syllabus - Medical Physics

This is the Spring 2023 syllabus for Physics 315, Medical Physics, at CCN

ENA ΑΓΝΩΣΤΟ ΝΟΜΙΚΟ ΧΕΙΡΟΓΡΑΦΟ ΑΠΟ ΤΗ ΜΑΝΗ

Δεν παρατίθεται περίληψη.No abstract

Physics 422 Spring 2023 Syllabus

Spring 2023 course syllabus for Physics 422, Biophysics, at the City College of New Yor