6. FROM DECOLONIAL INDIGENOUS KNOWLEDGES TO VERNACULAR IDEAS IN SOUTHEAST ASIA

Relations between humans and orangutans in present-day Malaysia show the historiographic and ethnographic problem of using the term “Indigenous knowledge.” Iban and Malay relationships with nonhuman animals are intersubjective and informed by particular subject formations, and indigeneity explains only one kind of relation. To analyze their relations simply in terms of decolonial Indigenous knowledge would be a culturally imperialist act from the Americas: decoloniality is specific to the development of racialization in the West via white settler colonialism, antiblack enslavement, and anti-Indigenous exploitation and genocide. Instead, this article draws from southern African historical sources and Southeast Asian ethnographic sources to advocate a historiography and ethnography of vernaculars, both vernacular knowledge and vernacular ignorance, in order to avoid autochthonous and potentially xenophobic claims.     

2. SOME KEYWORDS TOWARD DECOLONIAL METHODS: STUDYING SETTLER COLONIAL HISTORIES AND ENVIRONMENTAL VIOLENCE FROM TKARONTO

This article provides keywords and reflections for decolonial methods, drawing on insights from the Indigenous-led Land and the Refinery project, which concerns the history of Canada's Chemical Valley. This project is crucially organized as Indigenous people co-researching the Imperial Oil Refinery, not as academics studying Aamjiwnaang, and asks how Indigenous and decolonial methods might reorient the use of archives toward other futures. Together, the keywords begin to outline a particular place-based theory of change within decolonial historical practice.     

QUICK ESTIMATES OF SOFT SEDIMENT THICKNESSES FROM AMBIENT NOISE HORIZONTAL TO VERTICAL SPECTRAL RATIOS: A CASE STUDY IN SOUTHERN ITALY

An approach devoted to quickly assess the thickness of soft sedimentary cover in areas of unknown subsurface morphology is applied in this study. In particular, soil thickness (h) is derived by combining estimates of the resonance frequency (f _r ) relative to soft sediments with the local shear-wave velocity (V_s) profile. For this purpose, (f _r ) values are assessed from horizontal to vertical (H/V) spectral ratios of seismic noise recordings and the (V _s ) profile is obtained by considering information from shallow seismic surveys. Results obtained for a Quaternary sedimentary basin in Southern Italy are discussed. Since in the investigated area only weak independent constraints are available, special emphasis is given to the assessment of uncertainties involved in this estimate of soil thickness.