87 research outputs found

    RECONSTRUCTION OF SATELLITE DECRYPTION AND DATA HANDLING PROCESSES

    Get PDF
    This study examines how to reconstruct a satellite decryption process from source information. It examines how cryptographic algorithms are implemented in software and what software components are required to access data in a useable format. This examination enabled the reverse engineering and reconstruction of the decoding processes utilized by the three PropCubes: Merryweather, Fauna, and Flora. Transmitted data from these PropCubes was analyzed to verify the validity of the developed decryption and data handling Python scripts. A concept of operations for implementing the reconstructed decryption and data handling processes in real-time is discussed in this research.http://archive.org/details/reconstructionof1094562698Lieutenant, United States NavyApproved for public release; distribution is unlimited

    Becoming Two-Spirit: Difference and desire in Indian country.

    Get PDF
    Within the last ten years, the term Two-Spirit has grown in popularity as a way for gay and lesbian Native Americans to identify with their Native ancestry and their sexual orientation. Also, Two-Spirit is a rallying point for social and political action among Native gays and lesbians. As an identity, Two-Spirit has come to emphasize social relations with the Native community versus that of the popular gay community. Two-Spirit people attempt to connect with the historical acceptance of sex and gender difference among tribal societies in an effort to reincorporate their uniqueness into contemporary Native communities. Two-Spirit people emphasize their cultural sameness with Native communities, while de-emphasizing sexual orientation as a personal defining characteristic. However, reincorporation is complicated by mainstream Native community heterosexism and homophobia. Two-Spirit people perceive that acceptance in Native communities hinges not only on their sexual orientation, but also their fulfillment of what ideally represents "Indianness" for communities. Accordingly, it is within the discursive dialectics on Indian, gay, and Two-Spirit, where the performance of identity is figured, translated and acted out, resulting in a set of exclusionary and inclusive features based on notions of cultural and racial authenticity. In seeking acceptance, Two-Spirit people attempt to "find a place" for themselves in their respective tribal communities through service to the people

    Optogenetic regulation of site-specific subtelomeric DNA methylation

    Get PDF
    Telomere length homeostasis, critical for chromosomal integrity and genome stability, is controlled by intricate molecular regulatory machinery that includes epigenetic modifications. Here, we examine site-specific and spatiotemporal alteration of the subtelomeric methylation of CpG islands using optogenetic tools to understand the epigenetic regulatory mechanisms of telomere length maintenance. Human DNA methyltransferase3A (DNMT3A) were assembled selectively at chromosome ends by fusion to cryptochrome 2 protein (CRY2) and its interacting complement, the basic helix loop helix protein-1 (CIB1). CIB1 was fused to the telomere-associated protein telomere repeat binding factor-1 (TRF1), which localized the protein complex DNMT3A-CRY2 at telomeric regions upon excitation by blue-light monitored by single-molecule fluorescence analyses. Increased methylation was achieved selectively at subtelomeric CpG sites on the six examined chromosome ends specifically after blue-light activation, which resulted in progressive increase in telomere length over three generations of HeLa cell replications. The modular design of the fusion constructs presented here allows for the selective substitution of other chromatin modifying enzymes and for loci-specific targeting to regulate the epigenetic pathways at telomeres and other selected genomic regions of interest

    Deletion of airway cilia results in noninflammatory bronchiectasis and hyperreactive airways

    Get PDF
    The mechanisms for the development of bronchiectasis and airway hyperreactivity have not been fully elucidated. Although genetic, acquired diseases and environmental influences may play a role, it is also possible that motile cilia can influence this disease process. We hypothesized that deletion of a key intraflagellar transport molecule, IFT88, in mature mice causes loss of cilia, resulting in airway remodeling. Airway cilia were deleted by knockout of IFT88, and airway remodeling and pulmonary function were evaluated. In IFT88− mice there was a substantial loss of airway cilia on respiratory epithelium. Three months after the deletion of cilia, there was clear evidence for bronchial remodeling that was not associated with inflammation or apparent defects in mucus clearance. There was evidence for airway epithelial cell hypertrophy and hyperplasia. IFT88− mice exhibited increased airway reactivity to a methacholine challenge and decreased ciliary beat frequency in the few remaining cells that possessed cilia. With deletion of respiratory cilia there was a marked increase in the number of club cells as seen by scanning electron microscopy. We suggest that airway remodeling may be exacerbated by the presence of club cells, since these cells are involved in airway repair. Club cells may be prevented from differentiating into respiratory epithelial cells because of a lack of IFT88 protein that is necessary to form a single nonmotile cilium. This monocilium is a prerequisite for these progenitor cells to transition into respiratory epithelial cells. In conclusion, motile cilia may play an important role in controlling airway structure and function

    Wielding the sword: President Xi’s new anti-corruption campaign

    Get PDF
    A state achieves legitimacy through multiple sources, one of which is the effectiveness of its governance. Generations of scholars since Hobbes have identified the maintenance of peace and order as core functions of a legitimate state. In the modern world, economic prosperity, social stability and effective control of corruption often provide adequate compensation for a deficit of democracy. Corruption closely correlates with legitimacy. While a perceived pervasive, endemic corruption undermines the legitimacy of a regime, a successful anti-corruption campaign can allow a regime to recover from a crisis of legitimacy (Gilley 2009; Seligson and Booth 2009). This is the rationale behind the periodical campaigns against corruption that have been conducted by the Chinese Communist Party (‘Party’ or ‘CCP’) (Manion 2004; Wedeman 2012). Political leaders in China have found it expedient to use anti-corruption campaigns to remove their political foes, to rein in the bureaucracy and to restore public confidence in their ability to rule. Through anti-corruption campaigns, emerging political leaders consolidate their political power, secure loyalty from political factions and regional political forces, and enhance their legitimacy in the eyes of the general public. In an authoritarian state that experiences a high level of corruption, an anti-corruption campaign is a delicate political battle that addresses two significant concerns. The first concern is to orchestrate the campaign so that it is regime-reinforcing instead of regime-undermining. To remain credible, the regime must demonstrate its willingness and capacity to punish corrupt officials at the highest levels.preprin

    Violent Governance, Identity and the Production of Legitimacy: Autodefensas in Latin America

    Get PDF
    This article examines the intersections of violence, governance, identity and legitimacy in relation to autodefensas (self-defence groups) in Latin America, focusing on Mexico and Colombia. By shifting focus from the question of where legitimacy lies to how it is produced and contested by a range of groups, we challenge the often presumed link between the state and legitimacy. We develop the idea of a field of negotiation and contestation, firstly, to discuss and critique the concept of state failure as not merely a Western hegemonic claim but also a strategic means of producing legitimacy by autodefensas. Secondly, we employ and enrich the notion of violent pluralism to discuss the pervasiveness of violence and the role of neoliberalism, and to address the question of non-violent practices of governance. We argue that the idea of a field of contestation and negotiation helps to understand the complexity of relationships that encompass the production of legitimacy and identity through (non)violent governance, whereby lines between (non)state, (non)violence, and (il)legitimacy blur and transform. Yet, we do not simply dismiss (binary) distinctions as these continue to be employed by groups in their efforts to produce, justify, challenge, contest and negotiate their own and others’ legitimacy and identity
    corecore