1,117 research outputs found

    Mobutu’s lingering legacy in Gbadolite

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    As we approach the 50th anniversary of President Mobutu Sese Seko’s rise to power, and the debates over the “next Congolese President” in 2016 intensify, it is a unique moment to reflect on his legacy and his lingering impact on the locality he once called home

    Effects the 2014 Medicaid Expansion on Seat belt use: An Investigation into Moral Hazard

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    Under the Patient Protection and Affordable Care Act, signed into law by President Obama in 2010, health insurance coverage was expanded to 20 million previously uninsured people. Of these, 14.5 million were Medicaid eligible. Moral Hazard, a common research topic in insurance, is defined as when the private actions of an individual in a risk-sharing situation influence the probability of the outcome. There are two types of moral hazard, called ex-post moral hazard and ex-ante moral hazard. In the case of health insurance, ex-post moral hazard is when a health behavior changes after an individual becomes insured. Ex-ante moral hazard, which is what is being investigated in this paper, is when a behavior changes and potentially causes a health event. This paper considers that ex-ante moral hazard developed in the portion of the population insured by Medicaid following its expansion in 24 states. A difference-in-difference model is used to compare these 24 states to the 18 that have not voted to expand Medicaid. There are eight states which are excluded from the model because the legislatures of these states voted to expand Medicaid after the January 1, 2014 deadline. The data came from the Behavioral Risk Factor Surveillance System, which is maintained by the Centers for Disease Control. I examine the rate of seat belt use as a risky health behavior in expansion states versus non-expansion states to determine if there is a difference resulting from moral hazard. Results show that there is no decrease in seatbelt use associated with the expansion of Medicaid

    Experience-based language acquisition: a computational model of human language acquisition

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    Almost from the very beginning of the digital age, people have sought better ways to communicate with computers. This research investigates how computers might be enabled to understand natural language in a more humanlike way. Based, in part, on cognitive development in infants, we introduce an open computational framework for visual perception and grounded language acquisition called Experience-Based Language Acquisition (EBLA). EBLA can “watch” a series of short videos and acquire a simple language of nouns and verbs corresponding to the objects and object-object relations in those videos. Upon acquiring this protolanguage, EBLA can perform basic scene analysis to generate descriptions of novel videos. The general architecture of EBLA is comprised of three stages: vision processing, entity extraction, and lexical resolution. In the vision processing stage, EBLA processes the individual frames in short videos, using a variation of the mean shift analysis image segmentation algorithm to identify and store information about significant objects. In the entity extraction stage, EBLA abstracts information about the significant objects in each video and the relationships among those objects into internal representations called entities. Finally, in the lexical acquisition stage, EBLA extracts the individual lexemes (words) from simple descriptions of each video and attempts to generate entity-lexeme mappings using an inference technique called cross-situational learning. EBLA is not primed with a base lexicon, so it faces the task of bootstrapping its lexicon from scratch. The performance of EBLA has been evaluated based on acquisition speed and accuracy of scene descriptions. For a test set of simple animations, EBLA had average acquisition success rates as high as 100% and average description success rates as high as 96.7%. For a larger set of real videos, EBLA had average acquisition success rates as high as 95.8% and average description success rates as high as 65.3%. The lower description success rate for the videos is attributed to the wide variance in entities across the videos. While there have been several systems capable of learning object or event labels for videos, EBLA is the first known system to acquire both nouns and verbs using a grounded computer vision system

    DDR and return in the DRC - a foolish investment or necessary risk?

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    Tatiana Carayannis and Aaron Pangburn argue that it is time to rethink Disarmament, Demobilisation and Reintegration programs in the Democratic Republic of Congo

    Home is where the heart is: identity, return, and the Toleka bicycle taxi union in Congo’s equateur

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    Since the end of the 2006 post-war transition, the Democratic Republic of Congo (DRC) and the international community have struggled to design, finance and implement a host of national and regional disarmament, demobilization and reintegration (DDR) programmes. The weak capacity of implementing institutions, widespread corruption, funding gaps, Western-driven processes and a misdiagnosis of local needs have all been raised as core reasons behind failures. Little is known about how processes of ex-combatant return shape and reshape public authority, where former combatants return to, how they negotiate and experience ‘return’ and how viable ways of life are successfully constituted post return. While many ex-combatants in the DRC continue to be re-recruited into militia groups, one group that has reintegrated successfully is the Toleka—a several-thousand-strong group of ex-combatants who returned (or remained) in the provincial capital of Mbandaka (Equateur province). The Toleka formed a bicycle-taxi organization and unionized its membership, providing protections and collective-bargaining authority to the group, while providing a public good. It also helped to reshape identities, produce a sense of civilian solidarity and provide a bridging function from life in the military. This article looks at how this organization was formed, how the former fighters identified and capitalized on a local need and the conditions that allowed them to successfully unionize and protect their rights as they re-entered civilian life. Based on extensive fieldwork and interviews, this article seeks to understand a case of ‘successful’ return in a region with few such successes

    Photosynthetic Characterization of Invasive Plant Diversity in Los Angeles County from 1830-2010

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    The increase in atmospheric CO2 levels due to climate change may greatly impact invasive plant species, which are non-native organisms that spread unchecked in space and negatively impact native organisms. The success of these invasives may be related to specific traits, such as their photosynthetic pathway. We acquired the specimen information for invasive species registered in the Consortium for California Herbaria of the University of California Berkeley to evaluate the community dynamics of 1,000 invasive species in Los Angeles County. We found that both diversity and richness of invasive plant species has increased over a period of 180 years. We hypothesize that the pattern of occurrence of a given photosynthetic pathway may correspond with historical increases in atmospheric CO2 concentrations, therein favoring invasives with a C3 photosynthetic strategy. We utilized the primary literature to identify the photosynthetic pathway for all of the invasive plant species in our database, then used curve-fitting techniques to evaluate the change in richness for C3, C4, and CAM. We found evidence to support that C3 invasives were indeed favored over C4 and CAM. We are currently examining stomatal densities of historical specimens in order to link this finding to CO2 levels. If stomatal densities of these C3 invasives has decreased, they have been responding to increased CO2, supporting our hypothesis

    Human complement factor H. Two factor H proteins are derived from alternatively spliced transcripts

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    The human complement factor H is an important component in the control of the alternative pathway of complement activation. We have previously shown that at least three factor H homologous mRNA species of 4.3 kb, 1.8 kb and 1.4 kb in length are constitutively expressed in human liver. In addition, several factor Hrelated proteins have been detected in human sera using antibodies directed against the classical human factor H glycoprotein of 150 kDa.The structure of the additional polypeptides has not been shown so far. Circumstantial evidence suggests that the 1.8-kb mRNA might encode the 43-kDa factor H-like polypeptide. Here we report the isolation, characterization and eukaryotic expression of the first full-length cDNA representing the major 4.3-kb mRNA and the 1.8-kb mRNA of human factor H. We show that the 4.3-kb transcript encodes the 150-kDa-factor H glycoprotein and the 1.8-kb mRNA the 43-kDa factorH polypeptide. The identity of the two cDNA in a region of 1400 nucleotides suggests that the two factor H-related transcripts are derived from one gene by a process of alternative splicing

    Beyond the Employment Dichotomy: An Examination of Recidivism and Days Remaining in the Community by Post-Release Employment Status

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    Criminological research has tended to consider employment in a dichotomy of employed versus unemployed. The current research examines a sample of individuals 1-year post-release to assess the extent to which four distinct employment categories (full-time, part-time, disabled, and unemployed) are associated with reincarceration and days remaining in the community. Findings indicate disabled individuals remain in the community longer and at a higher proportion compared with other employment categories. Furthermore, unique protective and risk factors are found to be associated with each employment category while some risk factors (e.g., homelessness) highlight the importance of addressing reentry barriers regardless as to employment status
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