Linear Feedback Shift Registers and Cyclic Codes in SAGE

This talk will discuss the history of linear feedback shift registers (LFSR) in cryptographic applications and will attempt to implement an algorithm in SAGE and Python to create a linear feedback shift register sequence (LFSR sequence) in cryptography. Also, this talk will describe an implementation of the Berlekamp-Massey Iterative Algorithm in SAGE and Python. This algorithm will be able to use the Linear Feedback Shift Register sequence generated by the first algorithm to find the sequence\u27s connection polynomial. I will attempt to show that the connection polynomial of a given LFSR sequence is the reverse of a generator polynomial of the cyclic code of length p , where p is also the period of the LFSR sequence. This will provide a connection between cyclic error-correcting codes and LFSR sequences

Social evolution in mammals

Long-term, individual-based field studies, the application of genetic techniques and phylogenetic reconstructions have led to substantial advances in our understanding of the diversity and evolution of mammalian breeding systems and their consequences. They show how contrasts in ecology, life histories and phylogeny affect the distributions of breeding females and breeding males; how the distributions of both sexes affect the evolution of breeding systems and the composition and kinship structure of social groups; how contrasts in breeding systems and the social environment that individuals encounter affect the selection pressures operating on both sexes and the evolution of their behavior, physiology and morphology; and how these differences affect the demography and dynamics of populations and their responses to variation in density, climate and human impact.European Research Counci

ENTREPRENEURIAL PLANNING AND URBAN ECONOMIC DEVELOPMENT: THE CASE OF ESTABLISHING COMMUTER RAIL IN ORLANDO, FLORIDA

Rooted in the theories of urban entrepreneurialism, this dissertation employs a political economy framework as a means of analyzing urban governance and economic development in the contemporary US city. This case study of Orlando adds to our understanding of how entrepreneurial narratives are being applied to transportation infrastructure projects in pursuit of local economic development. The empirical case study explores the relationship between planning narratives, urban governance and economic development in the establishment of the SunRail commuter rail system in central Florida. I present the political history of economic development and the role of local boosters in shaping the sociospatial distribution of urban infrastructure and public investment in Central Florida. Utilizing a qualitative research methodology, the case study is based on a series of extended interviews with transportation planners, urban policymakers and community leaders in the Orlando area. The empirical data was complemented with official documents and archival records concerning the planning of transit-oriented developments along the SunRail system. This research presents the current efforts of Central Florida boosters to apply governance approaches to reshape the urban form and to direct the ensuing flows of capital investment through the restructuring of the region’s transportation infrastructure and employing planning narratives that draw heavily on creating amenity growth strategies. Local boosters expect that by providing dense development corridors through the region, including transit-oriented development centers, the city will have met the pre-conditions for attracting private capital investment. Specifically, local leaders are seeking to attract investment by the type of firms that will provide high-wage jobs to the region to balance the glut of low-wage service sectors jobs found in the region’s theme park industry. In the case of Central Florida, early private investment in SunRail adjacent property has come from local firms that tend to have a high level of local fixity and existing investments in the Orlando market

Maori octopus (Octopus maorum) bycatch and southern rock lobster (Jasus edwardsii) mortality in the South Australian lobster fishery

Octopuses are commonly taken as bycatch in many trap fisheries for spiny lobsters (Decapoda: Palinuridae) and can cause significant levels of within-trap lobster mortality. This article describes spatiotemporal patterns for Maori octopus (Octopus maorum) catch rates and rock lobster (Jasus edwardsii) mortality rates and examines factors that are associated with within-trap lobster mortality in the South Australian rock lobster fishery (SARLF). Since 1983, between 38,000 and 119,000 octopuses per annum have been taken in SARLF traps. Catch rates have fluctuated between 2.2 and 6.2 octopus/100 trap-lifts each day. There is no evidence to suggest that catch rates have declined or that this level of bycatch is unsustainable. Over the last five years, approximately 240,000 lobsters per annum have been killed in traps, representing ~4% of the total catch. Field studies show that over 98% of within-trap lobster mortality is attributable to octopus predation. Lobster mortality rates are positively correlated with the catch rates of octopus. The highest octopus catch rates and lobster mortality rates are recorded during summer and in the more productive southern zone of the fishery. In the southern zone, within-trap lobster mortality rates have increased in recent years, apparently in response to the increase in the number of lobsters in traps and the resultant increase in the probability of octopus encountering traps containing one or more lobsters. Lobster mortality rates are also positively correlated with soak-times in the southern zone fishery and with lobster size. Minimizing trap soak-times is one method currently available for reducing lobster mortality rates. More significant reductions in the rates of within-trap lobster mortality may require a change in the design of lobster traps

Seminarian Perspectives on Catholic Schools and the New Evangelization

Recognizing that pastors of parishes with a Catholic school play a vital role in Catholic education, and that the seminarians of today will be the parish pastors of tomorrow, this study sought to provide a better understanding of the perceptions held by Catholic seminarians about parish schools. Fourteen seminary students from 12 seminaries and 14 different dioceses from across the United States participated in focus group interviews to discuss their thoughts and perceptions about parish schools. Themes that emerged from focus group discussions included the reinterpretation of the New Evangelization, the understanding of the value of Catholic schools, mixed feelings about leadership of a parish with a school, lack of preparation for school administration, and minimal preparation specific to Catholic schools. Recommendations include the addition of a focus on Catholic schools in new editions of the Program of Priestly Formation (USCCB, 2006) and changes to seminary curricula. Al reconocer que los pastores de parroquias con una escuela católica desempeñan un papel esencial en la educación católica y que los seminaristas de hoy en día serán los sacerdotes de las parroquias de mañana, este estudio busca facilitar la comprensión de las percepciones de los seminaristas católicos sobre las escuelas parroquiales. Catorce estudiantes seminaristas de doce seminarios y catorce diócesis de todo Estados Unidos participaron en entrevistas de grupos de debate para discutir sobre sus opiniones y percepciones sobre las escuelas parroquiales. Los temas que surgieron de las discusiones de los grupos de debate incluyeron la reinterpretación de la nueva evangelización, la comprensión del valor de las escuelas católicas, los sentimientos mezclados sobre el liderazgo de las parroquias con escuela, la falta de preparación para la administración de las escuelas y la preparación mínima específica en las escuelas católicas. Las recomendaciones incluyen poner el foco a las escuelas católicas en nuevas ediciones del Program of Priestly Formation (USCCB, 2006) y cambios al programa académico del seminario. Palabras clave: educación católica, escuelas elementales católicas, sacerdote de escuela elemental católica, nueva evangelización, seminarista, programa académico del seminario, currículo del seminario, formación del seminari

Mars habitat

The objective of this study is to develop a conceptual design for a permanently manned, self-sustaining Martian facility, to accommodate a crew of 20 people. The goal is to incorporate the major functions required for long term habitation in the isolation of a barren planet into a thriving ecosystem. These functions include living, working, service, and medical facilities as well as a green house. The main design task was to focus on the internal layout while investigating the appropriate structure, materials, and construction techniques. The general concept was to create a comfortable, safe living environment for the crew members for a stay of six to twelve months on Mars. Two different concepts were investigated, a modular assembly reusable structure (MARS) designated Lavapolis, and a prefabricated space frame structure called Hexamars. Both models take into account factors such as future expansion, radiation shielding, and ease of assembly

States’ Support of Non-Highway Modes of Transportation: Investigation and Synthesis

The objective of this study was to determine how Kentucky and other selected states support and assist non-highway transportation modes and to identify leading and innovative initiatives. For the purposes of this study, the non-highway modes are aviation, public transportation, rail, and waterways. This summary will briefly discuss the rationale, objectives, and methodology for this study. It also provides an overview of the outcomes of the study and the modal matrices