2,471 research outputs found
Notes on solving Maxwell equations, part 2, Green's function for stratified media
In the previous report (part 1), the problem and its governing equations are described and is discarded in this report. The finite element method in part 1, or any other method for that matter, determines the fields in and close to the scatterer (near-field) that is used to construct the fields in the far-field. The goal of part 2 is to find far-field expressions formulated as total fields or the Radar Cross Section (RCS) of the scattered fields. The far-field is calculated from the scatterer problem in the contrast formulation. The scatterer then acts as a radiating object with a known source J. Using Green's function theory, the far-field solution is just the convolution of that source with the fundamental solution G to the Maxwell equation. Without loss of generality, the expressions are formulated in total fields E and H. Again, the time convention for the time-harmonic term exp(-i¿t) is used, but in contrary to part 1, the quantities are in full dimensions, following closely the notation used by Chew, Balanis and others
Complex Centers and Powerful Peripheries: Catholicism, Music, and Identity Politics in Indonesia
This dissertation interrogates issues of piety, power, and politics through music in the Roman Catholic Church in multi-lingual, multi-ethnic Indonesia. This study implicates the power of institutions (the State and the Church), people (musicians, liturgical leaders, and congregants alike), and materials (hymnbooks, liturgical pamphlets, and other related media). My aim is to ethnographically re-center music produced by and for Catholic communities as a corrective to complicated and often troubling histories of center-periphery dynamics in religious, economic, musical, and political studies in Indonesia. Musical materials—such as the Madah Bakti hymnal, produced by the Pusat Musik Liturgi (PML) Center for Liturgical Music in Yogyakarta, Indonesia—have become key sites for communicating different visions of Indonesian Catholic identity and religious experience. Moving beyond a project that simply recounts historical and ethnographic narratives of Catholics in Indonesia, I ask: In what ways does the production, circulation, and consumption of music for Catholic communities shape the religious identities and experiences of Catholics in Indonesia? How do Catholics in Indonesia use music to express their minority identity and desire for representation and justice, in a nation where religious pluralism is included in official state discourse but increasingly occluded in daily social practice? And finally, who gets to musically control the discourse, practice, and meaning of Catholicism in Indonesia, and how is that power at times subverted? Focusing on the experience of Catholic communities on the islands of Java, Flores, and North Sumatra, this project will simultaneously work to ethnographically re-center traditional center-periphery power models, acknowledging that communities in peripheral islands have agentive power which makes them centers in certain ideological schema. Ultimately, this work ultimately transcends the particularities of music made by and for Catholics in Indonesia, showing how musical materials and the practices which surround them can be used to assert minority religious identity while at the same time speaking to the complex national and global histories which inform such power-filled artistic practices
Microwave Electronics
Contains reports on two research projects.U. S. ArmyLincoln Laboratory, Purchase Order DDL B-00306U. S. Navy (Office of Naval Research) under Contract Nonr-1841(49)U. S. Air Force under Air Force Contract AF19(604)-5200U. S. Nav
Hippopotamid dispersal across the Mediterranean in the latest Miocene: A re-evaluation of the Gravitelli record from Sicily, Italy
The first dispersal of Hippopotamidae out of Africa is recorded around 6 Ma, but this event is documented only in a few European localities. Among them, the uppermost Miocene deposits of Gravitelli in Sicily yielded particularly abundant hippopotamid remains. These specimens, published at the beginning of the 20th century, went lost during the 1908 earthquake that destroyed the city of Messina. The specimens from Gravitelli were ascribed to a new species, Hippopotamus siculus; their generic attribution was not questioned during the first half of the past century and they have not been revised in recent decades. The remains of the Gravitelli hippopotamid were mainly represented by isolated teeth and a few postcranial remains. Morphological and dimensional characters of the specimens, such as long lower premolars, lowcrowned molars, a lower canine with longitudinal ridges and a groove on the lateral surface and the overall dimensions suggest that the Sicilian hippopotamid was characterized by plesiomorphic features. The morphology of the specimens collected from Gravitelli is similar to that of Hexaprotodon? crusafonti, Archaeopotamus harvardi, Hexaprotodon sivalensis and Hexaprotodon garyam. Hexaprotodon? siculus is also morphometrically similar to Hexaprotodon sivalensis, but the lower premolars in the former are longer and wider than in the latter. Accordingly, we provisionally refer the Gravitelli hippopotamid to the genus Hexaprotodon. Hexaprotodon? siculus is dimensionally different from the Spanish latest Miocene hippopotamid, herein referred to as Archaeopotamus crusafonti, and the two species are considered as valid taxa. The paleobiogeography of the latest Miocene hippopotamids from the Mediterranean Basin is discussed
Canis etruscus (Canidae, Mammalia) and its role in the faunal assemblage from Pantalla (Perugia, central Italy): comparison with the Late Villafranchian large carnivore guild of Italy
A very rich faunal assemblage referred to the early Late Villafranchian (Olivola/Tasso Faunal Unit) has been found at the Early Pleistocene site of Pantalla (Perugia, central Italy). The assemblage contains a number of carnivores, including several specimens of the Etruscan wolf Canis etruscus Forsyth Major, 1877. Canis etruscus The Late Villafranchian assemblage from Pantalla provides valuable information about the Early Pleistocene carnivore guild in Italy. Together with the Etruscan wolf (probably a cooperative species hunting in packs) and Vulpes sp., the Pantalla faunal assemblage also records the occurrence of two felids, Lynx issiodorensis (Croizet & Jobert, 1828) and the giant cheetah Acinonyx pardinensis (Croizet & Jobert, 1828)
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