Suchergebnisse

A proposição de uma era axial, durando aproximadamente entre 800 e 200 a.C. e ocorrendo nas principais civilizações do mundo antigo (China, Índia e Oriente Próximo), independentes umas das outras, foi primeiramente introduzida por Alfred Weber e Karl Jaspers. Posteriormente ela foi desenvolvida por Robert Bellah e Shmuel Eisenstadt, entre outros, e procurava entender desde o início se teria havido uma segunda era axial que nos conduziu à modernidade e, em caso afirmativo, se ela consiste em uma secularização das conquistas da primeira era axial. Neste artigo argumenta-se que a noção de segunda era axial é significativa, mas que a emergência da modernidade não pode ser explicada em termos de secularização das realizações da primeira era axial. Ao invés, institucionalizou-se um novo princípio axial que separa o mundo moderno do pré-moderno. Esse novo princípio é enunciado com referência a Hans Blumenberg, Charles Taylor e, sobretudo, Max Weber. A ênfase encontra-se na dialética do desencantamento e no lugar da religião em uma era secular.

"How should we think about the "shape" of human history since the birth of cities, and where are we headed? Sociologist and historian John Torpey proposes that the "Axial Age" of the first millennium BCE, when some of the world's major religious and intellectual developments first emerged, was only one of three such decisive periods that can be used to directly affect present social problems, from economic inequality to ecological destruction. Torpey's argument advances the idea that there are in fact three "Axial Ages," instead of one original Axial Age and several subsequent, smaller developments. Each of the three ages contributed decisively to how humanity lives, and the difficulties it faces. The earliest, or original, Axial Age was a moral one; the second was material, and revolved around the creation and use of physical objects; and the third is chiefly mental, and focused on the technological. While there are profound risks and challenges, Torpey shows how a worldview that combines the strengths of all three ages has the potential to usher in a period of exceptional human freedom and possibility"--

This work focuses on the design of an axial flow ducted fan driven by a reciprocating engine. The solution minimizes the turbulization of the flow around the aircraft. The fan has a rotor - stator configuration. Due to the need for low weight of the fan, a carbon/epoxy composite material was chosen for the blades and the driving shaft.The fan is designed for optimal isentropic efficiency and free vortex flow. A stress analysis of the rotor blade was performed using the Finite Element Method. The skin of the blade is calculated as a laminate and the foam core as a solid. A static and dynamic analysis were made. The RTM technology is compared with other technologies and is described in detail.

The U.S. Army needs a Heavy Dry Support Bridge (HDSB) that can support the Military Load Class (MLC) 96 Heavy Equipment Transporter (HET) tractor trailer carrying an M-I Tank. An existing Axial Folding Bridge (AFB), which was originally designed for MLC 70 loading, has been proposed for load upgrade to demonstrate the feasibility of achieving MLC 96 capacity. This report reviews the upgrade, a finite element model of the bridge, and the actual testing of the bridge to verify the model. The bridge was modeled using the Structural Analysis and Design/Integrated Structural Design System (STAAD-III/ISDS) finite element analysis software. The analysis demonstrated that the existing bridge could be upgraded by simply bolting flat, thin plate elen1ents to the bottom chord of the structure using existing pin plate connector bolt holes and longer bolts. These plates effectively stiffen the bridge structure and maintain a stress level for all elements of the bridge that is no higher for the MLC 96 loading than was experienced for the unreinforced MLC 70 base structure. The modification added 208.7 kg per center section, or an increase in weight of 4.6%, for an increase in load capacity of 37%. A working load static test was conducted on a modified bridge. Four hydraulic actuators applied incremental loading on the bridge. Strain gauge and deflection data were recorded and compared to the analytical model. The model proved to be more flexible than the bridge, but the data showed good correlation in terms of stress ratios between various members. Stress levels were acceptable for the given loading, demonstrating that MLC 96 had successfully been achieved on the bridge. ; Master of Science