782 research outputs found

    Technical feasibility demonstration model of orbiting experiment for study of extended weightlessness

    Get PDF
    Technical feasibility demonstration model of primate orbiting experiment for study of extended weightlessnes

    Identification of Bare-Airframe Dynamics from Closed-Loop Data Using Multisine Inputs and Frequency Responses

    Get PDF
    Amethod is presented for computing multiple-input multiple-output frequency responses of bare-airframe dynamics for systems excited using orthogonal phase-optimized multisines and including correlated data arising from control mixing or feedback control. The estimation was posed as the solution to an underdetermined system of linear equations, for which additional information was supplied using interpolation of the frequency responses. A simulation model of the NASA T-2 aircraft having two inputs and two outputs was used to investigate the method in the open-loop configuration and under closed-loop control. The method was also applied to flight test data from the X-56A aeroelastic demonstrator having five inputs and ten outputs and flying under closed-loop control with additional control allocation mixing. Results demonstrated that the proposed method accurately estimates the bare airframe frequency responses in the presence of correlated data from control mixing and feedback control. Results also agreed with estimates obtained using different methods that are less sensitive to correlated inputs

    Diversity at the Ballot Box: Electoral Politics and Maine\u27s Minority Communities, Post-WWII to the Present

    Get PDF
    As this year’s Sampson Center exhibition makes clear the powerful desire to find historical inevitability in the advance toward equal opportunity for all Americans has become far more nuanced by the sometimes discomforting reminders that advances at the ballot box are neither as clear-cut nor as unconditional as we once hoped. The ancient antipathies of racism, anti-Semitism, and homophobia are not so easily elided by political campaigns and elections. The pace of social consensus requires a degree of patience and continuing attention that tries the very fabric of American life while we attempt to comprehend the consequences of change wrought by our heightened understanding of the implications of diversity in American life. Table of Contents: Introduction (Selma Botman, USM President) Quiet Revolution: A Tally of Black Victories (Bob Greene, for the African American Collection) Is It Good for the Jews? Is it Good for Everyone? Maine Jewry between Civic Idealism and the Politics of Reality (Abraham J. Peck, Scholar-in-Residence for the Judaica Collection) From the Closet to the Ballot-Box: Electoral Politics and Maine’s LGBT Citizens, 1970s to the Present (Howard M. Solomon, Scholar-in-Residence for the Lesbian, Gay, Bisexual, and Transgender Collection)https://digitalcommons.usm.maine.edu/event_catalog/1003/thumbnail.jp

    Liberating Visions: Religion and the Challenge of Change in Maine,1820 to the Present

    Get PDF
    Liberating Visions: Religion and the Challenge of Change in Maine, 1820 to the Present. Each of the Sampson Center’s three scholars has crafted an original essay related to one of the Sampson Center collections—African-American, Judaic, and Lesbian, Gay, Bisexual, and Transgender—thereby reflecting on how religious institutions have fostered minority identity and have framed social and cultural transformation. Table of Contents: Religion and Transformation (Joseph S. Wood, Provost and Vice President for Academic Affairs) Jean Byers Sampson Center for Diversity in Maine Programming (Susie Bock, Director, Sampson Center for Diversity in Maine and Head, USM Special Collections) The African American Collection “There’s a Blessing in Pressing:” Change in Maine’s African American Churches (Maureen Elgersman Lee, Associate Professor of History and Faculty Scholar for USM’s African American Collection) The Judaica Collection “Orthodox and Yet thoroughly Liberal:” Jews and Judaism in Maine Between Tradition and Change (Abraham J. Peck, Director, Academic Council for Post-Holocaust Christian, Jewish, and Islamic Studies and Scholar-in-residence for USM’s Judaica Collection) The Lesbian, Gay, Bisexual, and Transgender Collection Coming Out, Going In: Spirituality and Religion in Maine’s LGBT Communities (Howard M. Solomon, Adjunct Professor of History and Scholar-in-Residence for USM’s LGBT Collection)https://digitalcommons.usm.maine.edu/event_catalog/1001/thumbnail.jp

    Planning for Sustainability in Small Municipalities: The Influence of Interest Groups, Growth Patterns, and Institutional Characteristics

    Get PDF
    How and why small municipalities promote sustainability through planning efforts is poorly understood. We analyzed ordinances in 451 Maine municipalities and tested theories of policy adoption using regression analysis.We found that smaller communities do adopt programs that contribute to sustainability relevant to their scale and context. In line with the political market theory, we found that municipalities with strong environmental interests, higher growth, and more formal governments were more likely to adopt these policies. Consideration of context and capacity in planning for sustainability will help planners better identify and benefit from collaboration, training, and outreach opportunities

    Maternal mortality in the rural Gambia, a qualitative study on access to emergency obstetric care

    Get PDF
    BACKGROUND: Maternal mortality is the vital indicator with the greatest disparity between developed and developing countries. The challenging nature of measuring maternal mortality has made it necessary to perform an action-oriented means of gathering information on where, how and why deaths are occurring; what kinds of action are needed and have been taken. A maternal death review is an in-depth investigation of the causes and circumstances surrounding maternal deaths. The objectives of the present study were to describe the socio-cultural and health service factors associated with maternal deaths in rural Gambia. METHODS: We reviewed the cases of 42 maternal deaths of women who actually tried to reach or have reached health care services. A verbal autopsy technique was applied for 32 of the cases. Key people who had witnessed any stage during the process leading to death were interviewed. Health care staff who participated in the provision of care to the deceased was also interviewed. All interviews were tape recorded and analyzed by using a grounded theory approach. The standard WHO definition of maternal deaths was used. RESULTS: The length of time in delay within each phase of the model was estimated from the moment the woman, her family or health care providers realized that there was a complication until the decision to seeking or implementing care was made. The following items evolved as important: underestimation of the severity of the complication, bad experience with the health care system, delay in reaching an appropriate medical facility, lack of transportation, prolonged transportation, seeking care at more than one medical facility and delay in receiving prompt and appropriate care after reaching the hospital. CONCLUSION: Women do seek access to care for obstetric emergencies, but because of a variety of problems encountered, appropriate care is often delayed. Disorganized health care with lack of prompt response to emergencies is a major factor contributing to a continued high mortality rate

    Molecular profiling of human prostate tissues: insights into gene expression patterns of prostate development during puberty

    Full text link
    Testosterone production surges during puberty and orchestrates massive growth and reorganization of the prostate gland, and this glandular architecture is maintained thereafter throughout adulthood. Benign prostatic hyperplasia (BPH) and prostate adenocarcinoma (PCA) are common diseases in adulthood that do not develop in the absence of androgens. Our objective was to gain insight into gene expression changes of the prostate gland at puberty, a crucial juncture in prostate development that is androgen dependent. Understanding the role played by androgens in normal prostate development may provide greater insight into androgen involvement in prostatic diseases. Benign prostate tissues obtained from pubertal and adult age group cadaveric organ donors were harvested and profiled using 20,000 element cDNA microarrays. Statistical analysis of the microarray data identified 375 genes that were differentially expressed in pubertal prostates relative to adult prostates including genes such as Nkx3.1, TMEPAI, TGFBR3, FASN, ANKH, TGFBR2, FAAH, S100P, HoxB13, fibronectin, and TSC2 among others. Comparisons of pubertal and BPH expression profiles revealed a subset of genes that shared the expression pattern between the two groups. In addition, we observed that several genes from this list were previously demonstrated to be regulated by androgen and hence could also be potential in vivo targets of androgen action in the pubertal human prostate. Promoter searches revealed the presence of androgen response elements in a cohort of genes including tumor necrosis factor‐α induced adipose related protein, which was found to be induced by androgen. In summary, this is the first report that provides a comprehensive view of the molecular events that occur during puberty in the human prostate and provides a cohort of genes that could be potential in vivo targets of androgenic action during puberty.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154303/1/fsb2fj042415fje.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154303/2/fsb2fj042415fje-sup-0001.pd

    Children's exploration of the concepts of home and belonging: Capturing views from five European countries.

    Get PDF
    Understanding one’s sense of belonging is a central part of identity formation and self-awareness, feeling safe somewhere, with specific people is identified as a basic human need. This paper explores the ideas of children from three age groups in five different European as they discussed the concepts of ‘home’ and ‘belonging’. Findings showed that the children’s ideas could be organised into six interrelated aspects: Spatiality, Materiality, Multiplicity, Social Relations, Affect, and Dislocation. Whilst there were differences in the ways that the children conceptualised home across the classes, even the youngest children were able to describe their ideas using metaphors and abstract concepts, and they agreed that a home was more than just a buildin

    Ernst Freund as Precursor of the Rational Study of Corporate Law

    Get PDF
    Gindis, David, Ernst Freund as Precursor of the Rational Study of Corporate Law (October 27, 2017). Journal of Institutional Economics, Forthcoming. Available at SSRN: https://ssrn.com/abstract=2905547, doi: https://dx.doi.org/10.2139/ssrn.2905547The rise of large business corporations in the late 19th century compelled many American observers to admit that the nature of the corporation had yet to be understood. Published in this context, Ernst Freund's little-known The Legal Nature of Corporations (1897) was an original attempt to come to terms with a new legal and economic reality. But it can also be described, to paraphrase Oliver Wendell Holmes, as the earliest example of the rational study of corporate law. The paper shows that Freund had the intuitions of an institutional economist, and engaged in what today would be called comparative institutional analysis. Remarkably, his argument that the corporate form secures property against insider defection and against outsiders anticipated recent work on entity shielding and capital lock-in, and can be read as an early contribution to what today would be called the theory of the firm.Peer reviewe
    corecore