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How the World Hunger Problem Was not Solved
Get PDFThe world food crisis (1972–1975) gave rise to new development concepts. To eradicate world hunger, small peasants were supposed to use ‘modern’ inputs like high-yielding seeds, fertilizer, pesticides and irrigation. This would turn subsistence producers into business owners, transform rural areas, invigorate national economies and the crisis-stricken world economy and thus stabilize capitalism.
Together with an in-depth account of the world food crisis, this book analyses how this global scheme largely failed. It shows its diverse initiators, their reasoning and motives, its political breakthrough, the degrees to which it was implemented globally and nationally in the following decades and its socioeconomic effects in rural areas. Despite internationally coordinated policies and coercive means, the scheme failed on all levels: situation analysis, design, policies, incapable institutions (including big business), implementation and peasants’ responses. Selective realization in certain regions and for certain crops and the appropriation of funds by local elites often aggravated inequality and hunger. Case studies are about Bangladesh, Indonesia, Tanzania and Mali. This book shows limits to global social engineering, imperialism and state control.
It is aimed at students, scholars, activists and non-specialists interested in development and the world food problem
Ich wanderte einsam wie eine Wolke durch die Welt. Überbordende formenvielfalt, leichte Kreuzbarkeit und mythische Ursprünge: Die Narzisse aus England und ihr globaler Siegeszug
No full textOutcomes of rotating versus pure hinge knee arthroplasty in the setting of one-stage exchange for periprosthetic joint infection.
No full textPURPOSE
Rotating or pure hinge knee prostheses are often used in case of periprosthetic joint infection (PJI). Five-year survival data of rotating hinge implants ranging from 52 to 90%, whereas pure hinge data are sparse. This study describes the results of both hinge knee prostheses after one-stage septic exchange.
METHODS
One hundred sixty-seven one-stage septic exchanges of a primary unconstrained total knee arthroplasty (TKA) to a cemented hinge prosthesis (117 rotating and 50 pure hinge TKAs) performed between 2008 and 2017 were retrospectively reviewed. Exclusion criteria were stem extensions or augments used in primary TKA, history of extensor mechanism reconstruction, and a follow-up less than two years after surgery. Rates of reinfection, mechanical failures, and all-cause revision-free survival data were documented.
RESULTS
At five years, the all-cause revision-free survival was 77% (95% CI 69 to 82). Thirty-one patients (19%) had further revision for aseptic reasons. In the rotating hinge group, the mechanical failure rate was more than twice as high as in the pure hinge group (13% vs 6%), significantly influenced by higher body weight. At a mean follow-up of 6.7 years, 21 (13%) patients had a reinfection and underwent a further surgery. Reinfection rates did not differ between the two groups.
CONCLUSION
The use of hinge TKA in the revision of PJI shows favourable five year infection-free and all-cause revision-free survival rates of 91% and 77%, respectively. Our study showed poorer results of the rotating hinge design. These results may help surgeons to choose proper implants in case of septic knee revision
Neue Arbeitsmodelle: Bei den Auswirkungen für Mitarbeitende, Unternehmen und Umwelt kommt es aufs konkrete WIE an
No full textIm Zuge anstehender Herausforderungen in der Arbeitswelt experimentieren viele Unternehmen mit alternativen Arbeitsmodellen. Potenziell ermöglichen diese Modelle viele Vorteile für Mitarbeitende und Unternehmen. Im Gastbeitrag berichtet das Centre for Development and Environment der Universität Bern (CDE) vom einem Forschungsprojekt, das erforscht, wie eine erfolgreiche Umsetzung gelingen kann
Spatially resolving the volatile sulfur abundance in the HD 100546 protoplanetary disc
Get PDFVolatile elements play a crucial role in the formation of planetary systems. Their abundance and distribution in protoplanetary discs provide vital insights into the connection between formation processes and the atmospheric composition of individual planets. Sulfur, being one of the most abundant elements in planet-forming environments, is of great significance, and now observable in exoplanets with JWST. However, planetary formation models currently lack vital knowledge regarding sulfur chemistry in protoplanetary discs. Developing a deeper understanding of the major volatile sulfur carriers in discs is essential to building models that can meaningfully predict planetary atmospheric composition, and reconstruct planetary formation pathways. In this work, we combine archival observations with new data from the Atacama Large sub-Millimeter Array (ALMA) and the Atacama Pathfinder EXperiment (APEX), covering a range of sulfur-bearing species/isotopologs. We interpret this data using the DALI thermo-chemical code, for which our model is highly refined and disc-specific. We find that volatile sulfur is heavily depleted from the cosmic value by a factor of ∼1000, with a disc-averaged abundance of S/H ∼ 10−8. We show that the gas-phase sulfur abundance varies radially by ≳3 orders of magnitude, with the highest abundances inside the inner dust ring and coincident with the outer dust ring at r ∼ 150–230 au. Extracting chemical abundances from our models, we find OCS, H2CS, and CS to be the dominant molecular carriers in the gas phase. We also infer the presence of a substantial OCS ice reservoir. We relate our results to the potential atmospheric composition of planets in HD 100546, and the wider exoplanet population
Stationary jump processes for planar directions obtained by wrapping
No full textThis note briefly introduces four random jump processes for planar directions: the circular random telegraph signal, the wrapped Poisson process, the wrapped signed Poisson process and the wrapped compound Poisson process. These stochastic processes on the circle are time homogeneous and it is shown that they are also (weakly) stationary. Their means and their autocovariance functions are provided and shortly illustrated
Zur Namenwahl bei der Eheschliessung in der deutsch- und italienischsprachigen Schweiz. Zwischen Tradition, Gleichstellung und Selbstbestimmung
No full textParticipatory Development: An Analysis of Ostrom's Framework of Seven Design Principles in the Context of Social Enterprises in India
No full textSocial enterprises have intense interaction with their local communities and “are explicitly committed to generating social value in perpetuity” (Katz & Page, 2010). They bring cohesiveness and trust to their host communities and they are the civil society’s way of becoming the “primary stakehold- ers” (Cornwall, 2003) in development agendas. These are the aspects of societal living that Ostrom (2008) demonstrates through her research on local self-reliance and the development of a concerned civil society, which takes initiative for the management of its own resources. The analysis done in this chapter demonstrates the interplay of the social enterprise and public policy. Ostrom’s (2008) framework of seven design principles, which provide a normative reference for local self-governance initiatives, is mapped onto four social enterprise cases, selected for their extent of community engagement and self-regulation. This chapter follows a case- based methodology, with an analysis of four diverse types of social enter- prises, within the Indian context. A discussion of the design principles, within the social enterprise framework, is followed by the analysis of these cases. Each of the enterprises has a different level and style of commu- nity engagement and we use the design principles to demonstrate the effec- tiveness of their community participation. The case analysis demonstrates a way for policymakers to integrate and support the social enterprise as a crucial part of participatory development. Moreover, it aids entrepreneurs in evaluating the degree to which their host communities are invested in a truly participatory experience
Constraining the reflective properties of WASP-178 b using CHEOPS photometry
Get PDFContext. Multiwavelength photometry of the secondary eclipses of extrasolar planets is able to disentangle the reflected and thermally emitted light radiated from the planetary dayside. Based on this, we can measure the planetary geometric albedo Ag, which is an indicator of the presence of clouds in the atmosphere, and the recirculation efficiency ϵ, which quantifies the energy transport within the atmosphere.
Aims. We measure Ag and ϵ for the planet WASP-178 b, a highly irradiated giant planet with an estimated equilibrium temperature of 2450 K.
Methods. We analyzed archival spectra and the light curves collected by CHEOPS and TESS to characterize the host WASP-178, refine the ephemeris of the system, and measure the eclipse depth in the passbands of the two telescopes.
Results. We measured a marginally significant eclipse depth of 70 ± 40 ppm in the TESS passband, and a statistically significant depth of 70 ± 20 ppm in the CHEOPS passband.
Conclusions. Combining the eclipse-depth measurement in the CHEOPS (λeff = 6300 Å) and TESS (λeff = 8000 Å) passbands, we constrained the dayside brightness temperature of WASP-178 b in the 2250–2800 K interval. The geometric albedo 0.10.7 makes WASP-178 b an interesting laboratory for testing the current heat-recirculation models
Possible role of anthropogenic climate change in the record-breaking 2020 Lake Victoria levels and floods
Get PDFHeavy rainfall in eastern Africa between late 2019 and mid 2020 caused devastating floods and landslides throughout the region. These rains drove the levels of Lake Victoria to a record-breaking maximum in the second half of May 2020. The combination of high lake levels, consequent shoreline flooding, and flooding of tributary rivers caused hundreds of casualties and damage to housing, agriculture, and infrastructure in the riparian countries of Uganda, Kenya, and Tanzania. Media and government reports linked the heavy precipitation and floods to anthropogenic climate change, but a formal scientific attribution study has not been carried out so far. In this study, we characterize the spatial extent and impacts of the floods in the Lake Victoria basin and then investigate to what extent human-induced climate change influenced the probability and magnitude of the recordbreaking lake levels and associated flooding by applying a multi-model extreme event attribution methodology. Using remote-sensing-based flood mapping tools, we find that more than 29 000 people living within a 50 km radius of the lake shorelines were affected by floods between April and July 2020. Precipitation in the basin was the highest recorded in at least 3 decades, causing lake levels to rise by 1.21 m between late 2019 and mid 2020. The flood, defined as a 6-month rise in lake levels as extreme as that observed in the lead-up to May 2020, is estimated to be a 63-year event in the current climate. Based on observations and climate model simulations, the best estimate is that the event has become more likely by a factor of 1.8 in the current climate compared to a pre-industrial climate and that in the absence of anthropogenic climate change an event with the same return period would have led lake levels to rise by 7 cm less than observed. Nonetheless, uncertainties in the attribution statement are relatively large due to large natural variability and include the possibility of no observed attributable change in the probability of the event (probability ratio, 95 % confidence interval 0.8–15.8) or in the magnitude of lake level rise during an event with the same return period (magnitude change, 95 % confidence interval 0–14 cm). In addition to anthropogenic climate change, other possible drivers of the floods and their impacts include human land and water management, the exposure and vulnerability of settlements and economic activities located in flood-prone areas, and modes of climate variability that modulate seasonal precipitation. The attribution statement could be strengthened by using a larger number of climate model simulations, as well as by quantitatively accounting for non-meteorological drivers of the flood and potential unforced modes of climate variability. By disentangling the role of anthropogenic climate change and natural variability in the high-impact 2020 floods in the Lake Victoria basin, this paper contributes to a better understanding of changing hydrometeorological extremes in eastern Africa and the African Great Lakes region
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