159 research outputs found
Windbreaks in Sustainable Agricultural Systems
Sustainable agriculture is a system of whole-farm resource use balanced with whole-farm productivity. The overall level of productivity achieved is dependent upon the ability to coordinate and manage simultaneously the soil, water, plant, and animal resources within climatic and economic limits. Both the kind and amount of plants and animals supported by the system are important and play significant roles, both individually and collectively in maintaining a healthy farm environment. In the future, integrated systems will help reduce human impact on resources while providing sufficient supplies of high quality food and fiber. Windbreaks provide protection for people, animals, buildings, crops, and natural resources. They reduce soil erosion by wind and contribute to the control of runoff from agricultural lands. Individually, trees and shrubs can provide food and shelter for wildlife or be harvested for timber and fuelwood. Specialized tree crops, such as fruits or nuts can be harvested from windbreaks providing additional economic returns
Percepció d’inseguretat a Barcelona: factors individuals i entorn de barri
Treballs Finals del Mà ster de Criminologia, PolÃtica Criminal i de Seguretat, Facultat de Dret, Universitat de Barcelona, Curs: 2012-2013, Tutor: Juli Sabaté DelgadoEl tema d’aquest treball és l’anà lisi de la percepció d’inseguretat a Barcelona per tal de
d’identificar els factors que expliquen la construcció de la inseguretat tenint en compte tant
els aspectes individuals com els de l’entorn fÃsic, social i convivencial dels barris. L’anà lisi es
concreta en l’any 2011 per tal d’afrontar un altre punt important de la investigació, que és
considerar quines variables han pres una rellevà ncia especial en la inseguretat en un
moment de crisi econòmica i social com l’actual
La Ferrassie 1: New perspectives on a "classic" Neandertal.
The La Ferrassie 1 (LF1) skeleton, discovered over a century ago, is one of the most important Neandertal individuals both for its completeness and due to the role it has played historically in the interpretation of Neandertal anatomy and lifeways. Here we present new skeletal remains from this individual, which include a complete right middle ear ossicular chain (malleus, incus, and stapes), three vertebral fragments, and two costal remains. Additionally, the study of the skeleton has allowed us to identify new pathological lesions, including a congenital variant in the atlas, a greenstick fracture of the left clavicle, and a lesion in a mid-thoracic rib of unknown etiology. In addition, we have quantified the amount of vertebral pathology, which is greater than previously appreciated. We have complemented the paleopathological analysis with a taphonomic analysis to identify any potential perimortem fractures. The taphonomic analysis indicates that no surface alteration is present in the LF1 skeleton and that the breakage pattern is that of bone that has lost collagen, which would be consistent with the intentional burial of this individual proposed by previous researchers. In this study, we used CT and microCT scans in order to discover new skeletal elements to better characterize the pathological lesions and to quantify the fracture orientation of those bones in which the current plaster reconstruction did not allow its direct visualization, which underlines the broad potential of imaging technologies in paleoanthropological research. A century after its discovery, LF1 is still providing new insights into Neandertal anatomy and behavior
Fire and brief human occupations in Iberia during MIS 4: Evidence from Abric del Pastor (Alcoy, Spain)
There is a relatively low amount of Middle Paleolithic sites in Europe dating to MIS 4. Of the few that
exist, several of them lack evidence for anthropogenic fire, raising the question of how this period
of global cooling may have affected the Neanderthal population. The Iberian Peninsula is a key area
to explore this issue, as it has been considered as a glacial refugium during critical periods of the
Neanderthal timeline and might therefore yield archaeological contexts in which we can explore
possible changes in the behaviour and settlement patterns of Neanderthal groups during MIS 4.
Here we report recent data from Abric del Pastor, a small rock shelter in Alcoy (Alicante, Spain) with
a stratified deposit containing Middle Palaeolithic remains. We present absolute dates that frame
the sequence within MIS 4 and multi-proxy geoarchaeological evidence of in situ anthropogenic fire,
including microscopic evidence of in situ combustion residues and thermally altered sediment. We also
present archaeostratigraphic evidence of recurrent, functionally diverse, brief human occupation of the
rock shelter. Our results suggest that Neanderthals occupied the Central Mediterranean coast of the
Iberian Peninsula during MIS 4, that these Neanderthals were not undergoing climatic stress and they
were habitual fire users.This research was funded by a Leakey Foundation General Grant, Spanish Ministry of Science, Innovation
and Universities Projects HAR2008-06117/HIST and HAR2015-68321-P, Junta de Castilla y León-FEDER
Project BU235P18, the LabEx Sciences Archéologiques de Bordeaux (LaScArBx ANR-10-LABX-52) and ERC
Consolidator Grant ERC-CoG-2014. Archaeological excavations at Abric del Pastor are supported by the
Archaeological Museum of Alcoy and the Government of Valencia Cultural Heritage Department
The functional brain networks that underlie Early Stone Age tool manufacture
After 800,000 years of making simple Oldowan tools, early humans began manufacturing Acheulian handaxes around 1.75 million years ago. This advance is hypothesized to reflect an evolutionary change in hominin cognition and language abilities. We used a neuroarchaeology approach to investigate this hypothesis, recording brain activity using functional near-infrared spectroscopy as modern human participants learned to make Oldowan and Acheulian stone tools in either a verbal or nonverbal training context. Here we show that Acheulian tool production requires the integration of visual, auditory and sensorimotor information in the middle and superior temporal cortex, the guidance of visual working memory representations in the ventral precentral gyrus, and higher-order action planning via the supplementary motor area, activating a brain network that is also involved in modern piano playing. The right analogue to Broca’s area—which has linked tool manufacture and language in prior work1,2—was only engaged during verbal training. Acheulian toolmaking, therefore, may have more evolutionary ties to playing Mozart than quoting Shakespeare
First Early Hominin from Central Africa (Ishango, Democratic Republic of Congo)
Despite uncontested evidence for fossils belonging to the early hominin genus Australopithecus in East Africa from at least 4.2 million years ago (Ma), and from Chad by 3.5 Ma, thus far there has been no convincing evidence of Australopithecus, Paranthropus or early Homo from the western (Albertine) branch of the Rift Valley. Here we report the discovery of an isolated upper molar (#Ish25) from the Western Rift Valley site of Ishango in Central Africa in a derived context, overlying beds dated to between ca. 2.6 to 2.0 Ma. We used µCT imaging to compare its external and internal macro-morphology to upper molars of australopiths, and fossil and recent Homo. We show that the size and shape of the enamel-dentine junction (EDJ) surface discriminate between Plio-Pleistocene and post-Lower Pleistocene hominins, and that the Ishango molar clusters with australopiths and early Homo from East and southern Africa. A reassessment of the archaeological context of the specimen is consistent with the morphological evidence and suggest that early hominins were occupying this region by at least 2 Ma
Mandarin-English Bilinguals Process Lexical Tones in Newly Learned Words in Accordance with the Language Context
Previous research has mainly considered the impact of tone-language experience on ability to discriminate linguistic pitch, but proficient bilingual listening requires differential processing of sound variation in each language context. Here, we ask whether Mandarin-English bilinguals, for whom pitch indicates word distinctions in one language but not the other, can process pitch differently in a Mandarin context vs. an English context. Across three eye-tracked word-learning experiments, results indicated that tone-intonation bilinguals process tone in accordance with the language context. In Experiment 1, 51 Mandarin-English bilinguals and 26 English speakers without tone experience were taught Mandarin-compatible novel words with tones. Mandarin-English bilinguals out-performed English speakers, and, for bilinguals, overall accuracy was correlated with Mandarin dominance. Experiment 2 taught 24 Mandarin-English bilinguals and 25 English speakers novel words with Mandarin like tones, but English-like phonemes and phonotactics. The Mandarin-dominance advantages observed in Experiment 1 disappeared when words were English-like. Experiment 3 contrasted Mandarin-like vs. English-like words in a within-subjects design, providing even stronger evidence that bilinguals can process tone language-specifically. Bilinguals (N = 58), regardless of language dominance, attended more to tone than English speakers without Mandarin experience (N = 28), but only when words were Mandarin-like -- not when they were English-like. Mandarin-English bilinguals thus tailor tone processing to the within-word language context
EC91-1772 Windbreaks in Sustainable Agricultural Systems
Extension Cooperative: 91-1772-X: Windbreaks in Sustainable Agricultural Systems talks about the formation of the field to prevent any hazardous destruction to the fields
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