Mine blast vibration response spectrum for structural vulnerability assessment: case study of heritage masonry buildings

Ground-borne vibrations induced by mine blasting are typically of low amplitudes, which are not considered a major concern for modern engineered structures. However, historic structures are often considered more vulnerable due to inadequate knowledge regarding the state of construction materials and structural response. Specifically, the construction materials used might be fragile or have deteriorated to a stage that could be vulnerable to such vibrations. Simplistic rule based on peak ground motion parameter has been adopted worldwide for safety assessment, while the frequency characteristics of vibrations are not taken into account. Further, there is very limited study on response of heritage structures to near-field blasting. This article presents a practical structural vulnerability assessment method for mine blast-induced vibrations. In particular, a design response spectrum model is proposed based on close range measurements of nearby mine blasting, which is compared with an existing design spectrum model for far-field mine blasts and a typical design spectrum model for earthquake actions. The method is illustrated through a case study of heritage masonry buildings in Australia. The unique blast data presented and the generalized methodology would be useful to both structural engineers and blast engineers in considering potential effects of blasting on heritage structures.     

Late Pleistocene Lithic Procurement and Geochemical Characterization of the Cerro Kaskio Obsidian Source in South‐western Bolivia

Primary questions regarding the foraging behaviour of the first hunter–gatherers who colonized the New World are how they found, procured and utilized high‐quality raw materials for manufacturing stone tools. In this paper, we present evidence from the late Pleistocene site of Cueva Bautista in the highlands of south‐western Bolivia, which demonstrates that a substantial portion of the recovered stone tool assemblage originated in Cerro Kaskio, a recently discovered obsidian source located 15 km south‐west of the site. In addition to describing the geological and geochronological setting, we provide the first geochemical characterization of the Cerro Kaskio source by means of instrumental neutron activation analysis and energy‐dispersive X‐ray fluorescence. Supported on the technological analysis and archaeometric sourcing of the obsidian lithics found in Cueva Bautista, we discuss the nature of the procurement strategies practised by the earliest mobile hunter–gatherers who explored and colonized the Andean highlands. We conclude that opportunistic lithic resource procurement was probably an important component of the first foraging societies that explored the highland Andes.     

Hierarchical Information Integration Applied to Residential Choice Behavior

The method of hierarchical information integration can be applied to the study of complex decision-making processes in which preference formation is influenced by many attributes of choice alternatives. In this paper, we extend Louviere's (1984) original approach to include the modeling choice processes in addition to judgment processes. Assumptions underlying the original and our extension are discussed and the new method is applied in an analysis of residential choice behavior.     

‘Man can’t give birth,woman can't fish’: gender dynamics in the small-scale fisheries of Bangladesh

Going beyond the myths prevalent in the socio-cultural embeddedness of rural Bangladesh, this article examines the diverse visible and invisible roles of fisherwomen in small-scale fisheries. This research considered two ethnic groups situated in two different ecosystems: the floodplain freshwater ecosystem is represented by new-entrant Muslim fishers ‘Maimal’ and the coastal ecosystem is represented by caste-based Hindu fishers ‘Jaladas’. From the basic ontological worldview of human dignity, moral individualism, and the social recognition of women’s rights, we argue that fisherwomen’s roles need to be recognized, focused, and valued to develop a horizontal understanding that is a prerequisite to the process of democratization, and the proper functioning of a just society. In the rural societies, a host of attributes, such as the deep-rooted socio-cultural constructions of the motherly myth, extreme tolerance, family teaching, religious antagonism, poverty, lack of education, internalization of a subordinate position, lack of supportive institutions, and fear of loss of societal patronage, profoundly undermine the capacity of women to aspire and raise their voice. Fisherwomen are accrued an inferior social position although they perform unique roles in the areas of childcare, household upkeep, livelihoods, and psycho-social support for the seafaring fishers. Conducive to the ecotone of marine fisheries, this article also portrays how a rigid patriarchal form of society is seasonally transformed to matrifocality when fishermen are away for fishing for half the year.     

‘Be Not a Copy if Thou Canst Be an Original’: German Philosophy,Republican Pedagogy,Benthamism and Saint-Simonism in the Political Thought of Gioacchino di Prati

Summary

Born to a noble family in the Italian Trentino, Prati studied philosophy in Austria and Germany. Returning to Italy, he joined the carbonari, a network of revolutionary secret societies. Forced into exile in Switzerland, he worked as an educator alongside Pestalozzi. Following his expulsion from Switzerland, Prati sought refuge in Britain, becoming acquainted with Coleridge, the Benthamite utilitarians, and the Owenites. Following the July Revolution, Prati went to Paris, where he became a Saint-Simonian. Returning to Britain, he sought to convert the British to Saint-Simonism, before undertaking a series of other literary projects. He eventually returned to Italy, where he entered into correspondence with the Roman Catholic philosopher Antonio Rosmini. Prati left behind him a trail of letters, newspaper articles, pamphlets, and books, written in four different European languages. These have been hitherto neglected by scholars, and constitute the basis of the current article.     

Coarse Earthenware at the Dutch Colonial Cape of Good Hope, South Africa: A History of Local Production and Typology of Products

Coarse earthenware production at the Dutch East India Company (VOC) Cape settlement began shortly after the Company established its mercantile entrepôt on the shores of Table Bay in 1652. Made by European Company potters, these vessels reproduced the forms of the homeland in the raw materials of the colony. A history of VOC pottery manufacture and a typological examination of the products illustrates how the global movements of mercantile capitalism combined with the local circumstances of the Cape settlement to create a material form reminiscent of Europe, but purely colonial in the dynamics of its production and use.