Search results for "AA"

Gada as an Integrative Factor of Political Organization

1994

The Borana conserved landscape, Ethiopia

2008

Sull'organizzazione sociale tradizionale dei Borana: Contributo al dibattito

1988

This article deals with the traditional social organization of the Borana, an Oromo-speaking pastoral group of Northern Kenya and Southern Ethiopia. A special attention is reserved to the political role of four basic institutions: the kinship system, the gadaa system, the hariyaa system and the qaalluu. Cet article concerne l'organisation sociale des Borana, un groupe pastoral de langue Oromo du Kenya septentrional et de l'Ethiopie méridionale. Une attention particulière est portée au rôle politique de quatre institutions fondamentales: le système de parenté, les systèmes gadaa et hariyaa, et le qaalluu.

Power's Ambiguity or the Political Significance of Gada

1996

I Borana: Una società assembleare dell'Etiopia

1996

Etnografia degli Oromo-Borana , Kenya ed Etiopia.

Kypsä persoonallisuusko opettajan tärkein työväline? : kokemuksen ääni

2001

Keskiluokan ehtoja vapaaehtoistyölle

2000

Norm-inflation results for purely BBM-type Boussinesq systems

2022

This article is concerned with the norm-inflation phenomena associated with a periodic initial-value abcd-Benjamin-Bona-Mahony type Boussinesq system. We show that the initial-value problem is ill-posed in the periodic Sobolev spaces H−sp (0, 2π)×H−sp (0, 2π) for all s > 0. Our proof is constructive, in the sense that we provide smooth initial data that generates solutions arbitrarily large in H−sp (0, 2π) × H−sp (0, 2π)-norm for arbitrarily short time. This result is sharp since in [15] the well-posedness is proved to holding for all positive periodic Sobolev indexes of the form Hsp (0, 2π) × Hsp (0, 2π), including s = 0. peerReviewed

An efficient functional magnetic resonance imaging data reduction strategy using neighborhood preserving embedding algorithm

2021

High dimensionality data have become common in neuroimaging fields, especially group-level functional magnetic resonance imaging (fMRI) datasets. fMRI connectivity analysis is a widely used, powerful technique for studying functional brain networks to probe underlying mechanisms of brain function and neuropsychological disorders. However, data-driven technique like independent components analysis (ICA), can yield unstable and inconsistent results, confounding the true effects of interest and hindering the understanding of brain functionality and connectivity. A key contributing factor to this instability is the information loss that occurs during fMRI data reduction. Data reduction of high …

Discovering hidden brain network responses to naturalistic stimuli via tensor component analysis of multi-subject fMRI data

2021

The study of brain network interactions during naturalistic stimuli facilitates a deeper understanding of human brain function. To estimate large-scale brain networks evoked with naturalistic stimuli, a tensor component analysis (TCA) based framework was used to characterize shared spatio-temporal patterns across subjects in a purely data-driven manner. In this framework, a third-order tensor is constructed from the timeseries extracted from all brain regions from a given parcellation, for all participants, with modes of the tensor corresponding to spatial distribution, time series and participants. TCA then reveals spatially and temporally shared components, i.e., evoked networks with the …