Optimal Spectral Acceleration-based Intensity Measure for Seismic Collapse Assessment of P-Delta Vulnerable Frame Structures

This study proposes an “optimal” spectral acceleration-based intensity measure (IM) to assess the collapse capacity of highly inelastic frame structures vulnerable to the P-delta effect. The IM is derived from the geometric mean of the spectral pseudo-acceleration over a certain period interval. The lower bound period of the averaging interval is related to the mode in which 95% of the effective modal mass is exceeded. The upper bound period is 1.6 times the fundamental period. This IM provides minimum, or close to the minimum, dispersion for frames with different fundamental periods of vibration, or number of stories.     

Book Reviews

Abstract

I begin with an attempt to discern the contours of the "debate" contained in the edited volume Theology and the Political: The New Debate. While the Radical Orthodox contributors are eager to critique those outside the fold, only two authors seem to talk back to them: Kenneth Surin and Mary-Jane Rubenstein. I agree with Surin's rejection of ontological hierarchy and Rubenstein's recommendation of Nancy's notion of "being-with," and I use their arguments to critique Radical Orthodoxy's ontology and their simplistic approach to "secular" authors, respectively. Insofar as one must discuss ontology in relation to theology and the political, I propose that we must actually develop a new ontology rather than simply reassert some version of the Thomistic synthesis. Finally, I fault the relative lack of reference to actual political practice, and above all the complete absence of Latin American liberation theology, in a volume ostensibly discussing "theology and the political."     

The counter-revolutionary Atlantic: white West Indian petitions and proslavery networks

Following recent research into imperial networks and their materialities, this paper addresses the geographies of the early-modern Atlantic. Its focus is the defensive response of white West Indian colonists to the emergence of popular antislavery sentiment in Britain during the ‘age of abolition’ (c. 1780–1833), which led to the increasing marginalization of slave-holding interests. This response included the production of corporate legislative petitions that sought to prevent or delay the reform of slavery. The paper argues that these petitions should be understood not as rhetorical forms of ‘influence’ that can be analysed in terms of their language, but as material objects whose potential efficacy derived from how, and in what textual company, they travelled. Tracing these material networks of petitioning provides a means to operationalize ‘circum-Atlantic’ perspectives and thus explore the spaces of the Atlantic. The paper also considers how theories of creolization, which underpin much thinking about the Atlantic, might be informed by a consideration of these petitionary networks.

L'Atlantique contre-révolutionnaire: les demandes des blancs des Antilles et les réseaux favorables à l'esclavagisme

Cet article fait suite aux recherches récentes effectuées sur les réseaux impériaux et leurs matérialités et s'intéresse aux géographies du début de l'époque moderne de l'Atlantique. Il met l'accent sur la réaction défensive des colons blancs des Antilles devant l'arrivée du sentiment populaire anti-esclavagiste en Angleterre pendant «l'ère abolitionniste» (1780–1833) qui a contribué à la marginalisation des propriétaires d'esclaves. Cette réaction comprenait des pétitions légales relevant de sociétés privées dont le but était d'empêcher ou de retarder le projet de réforme de l'esclavagisme. Cet article montre que ces pétitions ne devraient pas être vues comme des formes rhétoriques «d'influence» pouvant s'analyser en fonction de leurs modes linguistiques, mais comme des objets matériels dont la capacité de rendement résultait des manières et des formats textuels par lesquels elles pouvaient voyager. Remonter jusqu'aux réseaux concrets qui ont permis de protester par des pétitions est un moyen d'opérationnaliser les approches «circon-Atlantique» et d'explorer ainsi les espaces de l'Atlantique. Par ailleurs, l'article tente de montrer comment l'étude de ces réseaux de pétitions peut éclairer les théories de la créolisation qui sous-tendent la plupart des réflexions sur l'Atlantique.

El Atlántico contra-revolucionario: peticiones y organizaciones a favor de la esclavitud de la gente blanca de las Antillas

Con referencia a las recientes investigaciones de redes imperiales y su aspecto material, este papel trata las geografías del antiguo atlántico moderno. Se centra en la reacción defensiva de los colonos blancos de las Antillas al surgimiento del sentimiento popular antiesclavitud en Gran Bretaña durante ‘la era de la abolición’ (c. 1780–1833), que dio lugar a una marginación cada vez mayor de los intereses de los negreros. La producción de peticiones colectivas legislativas para tratar de impedir o retrasar la reforma de la esclavitud formó parte de esta reacción. Este papel sugiere que hay que ver estas peticiones no como formas retóricas de ‘influencia’ que se puede analizar por su lenguaje sino más bien como objetos materiales, la eficacia potencial de los cuales viene de cómo, y en qué compañía textual se viajaban. Un análisis del origen de estas redes materiales de peticionar posibilita el funcionamiento de perspectivas ‘circum-atlánticas’ y, por consiguiente, una exploración de los espacios del Atlántico. El papel también considera como teorías de criollización que son fundamentales al pensamiento actual sobre el Atlántico pueden ser informadas por un estudio de estas redes de peticionar.     

The representation of Mongolia in contemporary travel writing: imaginative geographies of a travellers' frontier

This article analyses the representation of Mongolia in five works of travel writing published since the fall of the country's communist regime in 1990. It argues that this travel writing is characterized by a discourse that generates and circulates an ‘imaginative geography’ of Mongolia as a ‘travellers' frontier’. Support for this argument is derived from highlighting sets of collective, cohesive representations, performances and speaking positions that crosscut the works studied. It is maintained that these have the effect of naturalizing a very particular conceptualization of Mongolia as a frontier destination in the age of globalization and mass tourism. This research adds to an established body of geographical scholarship on travel writing, but departs from it by considering contemporary works rather than ones from the colonial period. In doing so it attempts to illustrate the relevance of contemporary travel writing as an object of study for geographers seeking to explore the anatomy of today's imaginative geographies, which have clear links to, but are not entirely mediated by, the discourses that characterize colonial travel writing.     

Conceptualising differently-mobile passengers: geographies of everyday encumbrance in the railway station

This paper develops ideas of differential mobility at the scale of the ‘everyday’ by investigating some of the complex relationships between mobility and immobility; facilitation and encumbrance when moving through railway stations. Drawing on in-depth qualitative research with rail passengers in Britain, the first section explores the entangled relationship between differently-mobile bodies and the station by considering some of the tensions that emerge between experiences of encumbrance and facilitation. Focus here is on how navigating through the station with different mobile objects, or ‘prostheses’, impacts on passengers in a variety of ways. Drawing on insights from science, technology and society studies, it demonstrates how moving with different objects gives rise to fluid apprehensions of both mobile objects and the built form of the station itself. However, and importantly, this section suggests that this fluidity also has the capacity to disrupt the intended affective dimensions of the built form. The second section explores how differently-mobile passengers move through the station with these mobile objects. Drawing on de Certeau's notion of ‘tactics’ and Ingold's idea of the ‘taskscape’, this section pulls out some of the practical knowledges that, through repetition, develop into skills and techniques for moving. In doing so, this paper seeks to illuminate some of the complex relationships between mobility, prosthetics, encumbrance and affectivity that emerge when moving through the railway station.     

Hinton Rowan Helper's the land of gold and the evolution of race relations in California

The California Gold Rush of the mid‐nineteenth century attracted a multitude of prospectors from around the world, bringing together a vibrant mix of ethnicities and cultures. Historians have argued that race emerged as the most important mark of identity in California as whites labeled and eventually excluded ‘inferior’ races. Hinton Rowan Helper's The Land of Gold documented his three‐year trip to California in the early 1850s, recording his reactions to ‘others’ in detail. Helper has been portrayed as the archetypal white racist on the California frontier. This essay challenges that view, contending that he was more preoccupied with culture and behavior than race. It evaluates Helper's comments on, first, Native Americans, second, the Chinese, and finally, his wider reactions to California and the construction of whiteness.     

Securing the “Interests” of the South: John Mitchel,A.G. Magrath,and the Reopening of the Transatlantic Slave Trade

Traditionally scholars have downplayed the importance of southern calls to reopen the transatlantic slave trade in the 1850s. Those who have paid serious attention to this effort see it as another endeavor by aristocratic planters to enshrine their social, economic, and political power in the antebellum South. The advocates were, as one puts it, “no champions of the common white man.” Two Irish-American leaders who supported the reopening, John Mitchel and Andrew Gordon Magrath, complicate this view of the attempt as just a planters’ plot. Their actions and opinions indicate that some proponents did see importing African slaves as something that would benefit all whites and not just the elite, and, as a result, protect the overall “interests” of the South. Mitchel and Magrath's support of Ireland and Irish immigrants and their opposition to British power influenced their positions on the matter.