242 research outputs found

    The Myth of the Amorphous Peasantry: A Northern Nigerian Case Study

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    The purpose of this article is to present some rather detailed statistical ("grass-root") material bearing on the question of rural inequality, in the hope that this may help to bring discussion by economists out into the open. I am seeking to demonstrate that there are circumstances in which "inequality" may be a more realistic assumption than "uniform poverty," in which case it is the economic relationship between the different sections of the rural population which requires examination, together with the different scarcities (or groups of scarcities) from which these various sections suffer.Center for Research on Economic Development, University of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/100753/1/ECON218.pd

    Hidden Trade in Hausaland

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    This article is mainly concerned with the importance of the 'house-trade' conducted by fully-secluded women in a village, Batagarawa, in northern Katsina Emirate. I shall show that although each woman sells her produce within the privacy of her husband's compound, one may yet argue that the sellers as a group, together with their customers, are the equivalent of a market-place, especially so far as grains are concerned-a market-place of incomparably greater importance than that which was established in the village recently. Other economic activities of secluded women will also be mentioned.Center for Research on Economic Development, University of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/100752/1/ECON217.pd

    Decolonising Environmental Risk Assessments of Potentially Polluting Wrecks:a Case Study of the Wreck of the USS Mississinewa in Ulithi Lagoon, Federated States of Micronesia

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    Millions of tonnes of oil lie entombed within wrecks from two world wars which, when released, can cause environmental devastation. Wrecks are predominantly risk assessed by the Global North Nations responsible, resulting in an epistemology that separates human from nature. This research aimed to decolonise risk assessments to capture the spatially heterogeneous nature of human vulnerability to oil pollution. Triangulation analysis of interviews and official reports relating to the USS Mississinewa oil spill identified three Global South issues a Eurocentric risk assessment failed to capture: region-specific meteorological conditions causing the leak, remoteness making external resources slow to arrive, and the impact of the fishery closure on traditional subsistence lifestyles. A vulnerability assessment is proposed to prioritise wrecks in susceptible locations. Recommendations are made for a collaborative approach to wreck management by including local voices, resisting the Global North assumption of generality, and recognising the priorities of those living with wrecks

    Resource availability and territorial behavior in Ruby-throated Hummingbirds (Archilochus colubris) at UMBS

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    General EcologyThe goal of this study was to determine if Ruby-throated Hummingbirds (Archilochus colubris) exhibited territorial behaviors in relation to varied degrees of nectar availability. In order to examine this territorial behavior, we worked with students in the ornithology class to set-up 6 feeding sites at the edge of a field and woods at the University of Michigan Biological Station (UMBS) in Pellston, Michigan. Feeders at the sites were used to mimic low, intermediate, and high resource availability. Our group predicted that males would exhibit more territorial behavior than females at the sites with higher resource abundance. We also expected the most interactions to occur among males. We observed and recorded the territorial behavior of chasing at the feeding sites 3 times a day for hour-long periods for 4 days. Our results showed that the highest number of chasing behavior occurred at the single-feeder stations amongst females. We observed relatively low numbers of chasing between males. Furthermore, we observed that males preferred visiting sites with more feeders whereas females did not exhibit a clear preference of feeder abundance. Further studies on hummingbird territorial behavior would be beneficial to clarify whether chasing amongst females is common.http://deepblue.lib.umich.edu/bitstream/2027.42/116607/1/DesJardins_Hill_Washabaugh_Wellman_2015.pd

    Articulating encounters between children and plastics

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    In the context of global concerns about plastics, this paper sets out and exemplifies a research agenda for articulating children’s encounters with plastics. The paper analyses data co-produced with 11–15 year-olds through interviews, app-based research and experimental/arts-led workshops. It moves beyond scholarship in health and environmental sciences, and in environmental education research, to outline a far richer range of ways to conceptualise children’s encounters with plastics, based in children’s everyday, embodied and emotive interactions with plastics

    Resilience of SAR11 bacteria to rapid acidification in the high latitude open ocean

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    Ubiquitous SAR11 Alphaproteobacteria numerically dominate marine planktonic communities. Because they are excruciatingly difficult to cultivate, there is comparatively little known about their physiology and metabolic responses to long- and short- term environmental changes. As surface oceans take up anthropogenic, atmospheric CO2, the consequential process of ocean acidification could affect the global biogeochemical significance of SAR11. Shipping accidents or inadvertent release of chemicals from industrial plants can have strong short-term local effects on oceanic SAR11. This study investigated the effect of 2.5 fold acidification of seawater on the metabolism of SAR11 and other heterotrophic bacterioplankton along a natural temperature gradient crossing the North Atlantic Ocean, Norwegian and Greenland Seas. Uptake rates of the amino acid leucine by SAR11 cells as well as other bacterioplankton remained similar to controls despite an instant ∼50% increase in leucine bioavailability upon acidification. This high physiological resilience to acidification even without acclimation, suggests that open ocean dominant bacterioplankton are able to cope even with sudden and therefore more likely with long-term acidification effects

    Prochlorococcus can use the Pro1404 transporter to take up glucose at nanomolar concentrations in the Atlantic Ocean

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    Prochlorococcus is responsible for a significant part of CO2 fixation in the ocean. Although it was long considered an autotrophic cya- nobacterium, the uptake of organic compounds has been reported, assuming they were sources of limited biogenic elements. We have shown in laboratory experiments that Prochlorococcus can take up glucose. However, the mechanisms of glucose uptake and its occur- rence in the ocean have not been shown. Here, we report that the gene Pro1404 confers capability for glucose uptake in Prochlorococcus marinus SS120. We used a cyanobacterium unable to take up glu- cose to engineer strains that express the Pro1404 gene. These recombinant strains were capable of specific glucose uptake over a wide range of glucose concentrations, showing multiphasic trans- port kinetics. The Ks constant of the high affinity phase was in the nanomolar range, consistent with the average concentration of glu- cose in the ocean. Furthermore, we were able to observe glucose uptake by Prochlorococcus in the central Atlantic Ocean, where glucose concentrations were 0.5–2.7 nM. Our results suggest that Prochlorococcus are primary producers capable of tuning their metabolism to energetically benefit from environmental conditions, taking up not only organic compounds with key limiting elements in the ocean, but also molecules devoid of such elements, like glucos

    DIE BIOETHIK UND ANTHROPOLOGIE

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    Budući da je i bioetika, kako je već naznačeno i u njezinu imenu, posebna, specijalna etika (sadržana i u koncepciji bioetike kao nove, transdisciplinarne znanosti), prvo je rečeno ono osnovno o etici kao disciplini praktičke filozofije, da bi tako postao razgovjetniji i smisao, zadaća i mogućnosti bioetike kao primijenjene etike na područje života općenito, prvenstveno na čovjekov život i zdravlje. Kako je etika kao refleksija o ispravnom i dobrom ljudskom djelovanju bitno povezana s antropologijom kao filozofijskim i znanstvenim promišljanjem naravi, položaja u svijetu i biti čovjekova bića uopće (prirodnoga, društvenoga i duhovnog), to je u drugom dijelu ovoga konspekta pokazana i »pupčana« sveza bioetike s antropologijom, s posebnim obzirom na suvremene ekološke uvjete života, tj. na prijeteću globalnu i strukturalnu ekološku krizu.Since bioethics, as the name itself indicates, is a special kind of ethics (contained in the concept of bioethics as a new, transdisciplinary science), in the beginning, the basic thing about ethics as a discipline of practical philosophy is said, to make, therefore, more comprehensible the sense, task and possibilities of bioethics as applied ethics in the field of life in general, first of all, in human\u27s life and health. And since ethics as a reflection on right and good human activity is essentially connected with anthropology as philosophical and scientific reflexion on nature, on the position in the world and on the essence of human being in general (natural, social and spiritual) , thus, in the second part of this conspectus, the "umbilical" connection between bioethics and anthropology has been shown, with the special regard to contemporary ecological conditions of life, i.e. to the threatening global and ecological crisis.Da auch die Bioethik wie schon aus ihrem Namen hervorgeht eine besondere spezielle Ethik ist (das ist auch in der Konzeption der Bioethik als einer neuen transdisziplinaren Wisenschaft enthalten), wurde zuerst das Grundlegende über Ethik als einer Disziplin der praktischen Philosophie gesagt, damit so auch der Sinn deutlich wird, die Aufgabe und die Möglichkeiten der Bioethik als einer auf dem Gebiet des Lebens allgemein angewandten Ethik, vor allem angewandt auf das menschliche Leben und Gesundheit. Da die Ethik als eine Reflexion über die gute und richtige Wirkung des Menschen im Wesentlichen mit der Anthropologie als philosophische und wissenschaftliche Überlegung der menschlichen Natur verbunden ist, mit der Stellung in der Welt und dem Kern des menschlichen Wesens (natürlichem, gesellschaftlichem und geistigem), so ist im zweiten Teil dieses Konspekts die "Nabelschnurr" — Verbindung der Bioethik mit der Anthropologie dargelegt, und daß mit besonderer Berücksichtigung der heutigen ökologischen Umweltbediengungen., d.h. der droheneden globalen und strukturalen ökologischen Krise
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