Matching Items (43,917)
Description
Division of labor, whereby different group members perform different functions, is a fundamental attribute of sociality. It appears across social systems, from simple cooperative groups to complex eusocial colonies. A core challenge in sociobiology is to explain how patterns of collective organization are generated. Theoretical models propose that division of labor self-organizes, or emerges, from interactions among group members and the environment; division of labor is also predicted to scale positively with group size. I empirically investigated the emergence and scaling of division of labor in evolutionarily incipient groups of sweat bees and in eusocial colonies of harvester ants. To test whether division of labor is an emergent property of group living during early social evolution, I created de novo communal groups of the normally solitary sweat bee Lasioglossum (Ctenonomia) NDA-1. A division of labor repeatedly arose between nest excavation and guarding tasks; results were consistent with hypothesized effects of spatial organization and intrinsic behavioral variability. Moreover, an experimental increase in group size spontaneously promoted higher task specialization and division of labor. Next, I examined the influence of colony size on division of labor in larger, more integrated colonies of the harvester ant Pogonomyrmex californicus. Division of labor scaled positively with colony size in two contexts: during early colony ontogeny, as colonies grew from tens to hundreds of workers, and among same-aged colonies that varied naturally in size. However, manipulation of colony size did not elicit a short-term response, suggesting that the scaling of division of labor in P. californicus colonies is a product of functional integration and underlying developmental processes, rather than a purely emergent epiphenomenon. This research provides novel insights into the organization of work in insect societies, and raises broader questions about the role of size in sociobiology.
Contributors
Holbrook, Carter Tate (Author) / Fewell, Jennifer H (Thesis advisor) / Gadau, Jürgen (Committee member) / Harrison, Jon F. (Committee member) / Hölldobler, Berthold (Committee member) / Johnson, Robert A. (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Nonlinear dispersive equations model nonlinear waves in a wide range of physical and mathematics contexts. They reinforce or dissipate effects of linear dispersion and nonlinear interactions, and thus, may be of a focusing or defocusing nature. The nonlinear Schrödinger equation or NLS is an example of such equations. It appears as a model in hydrodynamics, nonlinear optics, quantum condensates, heat pulses in solids and various other nonlinear instability phenomena. In mathematics, one of the interests is to look at the wave interaction: waves propagation with different speeds and/or different directions produces either small perturbations comparable with linear behavior, or creates solitary waves, or even leads to singular solutions. This dissertation studies the global behavior of finite energy solutions to the $d$-dimensional focusing NLS equation, $i partial _t u+Delta u+ |u|^{p-1}u=0, $ with initial data $u_0in H^1,; x in Rn$; the nonlinearity power $p$ and the dimension $d$ are chosen so that the scaling index $s=frac{d}{2}-frac{2}{p-1}$ is between 0 and 1, thus, the NLS is mass-supercritical $(s>0)$ and energy-subcritical $(s<1).$ For solutions with $ME[u_0]<1$ ($ME[u_0]$ stands for an invariant and conserved quantity in terms of the mass and energy of $u_0$), a sharp threshold for scattering and blowup is given. Namely, if the renormalized gradient $g_u$ of a solution $u$ to NLS is initially less than 1, i.e., $g_u(0)<1,$ then the solution exists globally in time and scatters in $H^1$ (approaches some linear Schr"odinger evolution as $ttopminfty$); if the renormalized gradient $g_u(0)>1,$ then the solution exhibits a blowup behavior, that is, either a finite time blowup occurs, or there is a divergence of $H^1$ norm in infinite time. This work generalizes the results for the 3d cubic NLS obtained in a series of papers by Holmer-Roudenko and Duyckaerts-Holmer-Roudenko with the key ingredients, the concentration compactness and localized variance, developed in the context of the energy-critical NLS and Nonlinear Wave equations by Kenig and Merle. One of the difficulties is fractional powers of nonlinearities which are overcome by considering Besov-Strichartz estimates and various fractional differentiation rules.
Contributors
Guevara, Cristi Darley (Author) / Roudenko, Svetlana (Thesis advisor) / Castillo_Chavez, Carlos (Committee member) / Jones, Donald (Committee member) / Mahalov, Alex (Committee member) / Suslov, Sergei (Committee member) / Arizona State University (Publisher)
Created
2011
Deviant bodies resisting online: examining the intersecting realities of women of color in Xbox Live
Description
Employing qualitative methods and drawing from an intersectional framework which focuses on the multiple identities we all embody, this dissertation focuses on oppressions and resistance strategies employed by women of color in Xbox live, an online gaming community. Ethnographic observations and narrative interviewing reveal that women of color, as deviants within the space, face intersecting oppressions in gaming as in life outside the gaming world. They are linguistically profiled within the space based off of how they sound. They have responded with various strategies to combat the discrimination they experience. Some segregate themselves from the larger gaming population and many refuse to purchase games that depict women in a hyper-sexualized manner or that present people of color stereotypically. For others, the solution is to "sit-in" on games and disrupt game flow by 'player-killing' or engage in other 'griefing' activities. I analyze this behavior in the context of Black feminist consciousness and resistance and uncover that these methods are similar to women who employ resistance strategies for survival within the real world.
Contributors
Gray, Kishonna (Author) / Anderson, Lisa M. (Thesis advisor) / Cheong, Pauline (Committee member) / Lim, Merlyna (Committee member) / Arizona State University (Publisher)
Created
2011
Description
While the suicide rate in Mexico is relatively low when compared to countries throughout the world, it is increasing at an alarming pace. Unfortunately, the amount of suicide research focused on Mexican populations is relatively scarce. Using a sample of high school students living in Guanajuato, Mexico, this study explored the relationship between recent suicidal ideation and three factors that previous research in other countries has connected to suicide: Migration aspirations, religiosity, and sexual behavior. Using multiple and logistic regression, the results indicated the following: 1) Recent suicidal ideation predicted increased migration aspirations, 2) higher levels of external religiosity predicted lower odds of recent suicidal ideation, and 3) stronger parent-child relationships predicted lower odds of recent suicidal ideation. The findings are discussed in light of the Bronfenbrenner's ecological systems theory, Bogenschneider's risk/protection model, and Stark's religious commitment theory.
Contributors
Hoffman, Steven (Author) / Marsiglia, Flavio F (Thesis advisor) / Ayón, Cecilia (Committee member) / García-Pérez, Maria Hilda (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Historians often characterize first ladies in the Progressive Era as representatives of the last vestiges of Victorian womanhood in an increasingly modern society. This dissertation argues that first ladies negotiated an image of themselves that fulfilled both traditional and modern notions of womanhood. In crafting these images, first ladies constructed images of their celebrity selves that were uniquely modern. Thus, images of first ladies in the Progressive Era show them as modest and feminine but also autonomous, intelligent, and capable. Using the historian Charles Ponce de Leon's research on modern human-interest journalism, I contend that first ladies in the Progressive Era worked with the modern press in a symbiotic relationship. This relationship allowed the press exclusive access to what was, ostensibly, the first lady's private, and therefore authentic, self. By purporting to reveal parts of their private lives in the press, first ladies showed themselves as down-to-earth despite their success and fulfilled by their domestic pursuits despite their compelling public lives. By offering the press exclusive access to their lives, first ladies secured the opportunity to shape specific images of themselves to appeal, as broadly as possible, to their husbands and parties' constituents and the American public. First ladies in the Progressive Era thus acted as political figures by using both public and private, or what historian Catherine Allgor terms, "unofficial spaces" to support and reflect their husbands and parties' political agendas. In examining representations of first ladies in popular magazines and newspapers from 1901 to 1921 in tandem with letters, memoirs, and other personal papers from these women, a clear pattern emerges. Despite personal differences, first ladies in the Progressive Era represented themselves according to a specific formula in the modern press. The images, constructed by first ladies in this time period, reflect shifts in economic, social, and political life in Progressive Era America, which called for women to be independent and intelligent yet still maintain their femininity and domesticity.
Contributors
Horohoe, Jill (Author) / Gullett, Gayle (Thesis advisor) / Longley, Rodney K (Committee member) / Warren-Findley, Jannelle (Committee member) / Arizona State University (Publisher)
Created
2011
Description
The most horrific, darkest, and powerful forms of the sublime take place inside the enclosure of the human psyche; the interior of the mind is the playground for the sublime--not the crag and canyon filled natural world. For Immanuel Kant and Edmund Burke, the driving force of the power of the sublime stems from the feelings of pain and fear: where is that more manifested than in the mind? Unlike the common, traditional, and overwhelmed discussion of Percy Shelley and his contemporaries and the power of the sublime in nature, I will argue that in The Cenci, Shelley, through well-chosen diction and precise composition of terrifying images, fashions characters and scenes in an emotion-driven play that elevates the mind of the reader to a transcendent sublime experience. Through a discussion of the theories of the aesthetic of the sublime laid out by Longinus, Burke, and Kant, I will provide a foundation for the later discussion of the rhetorical sublime evoked by Shelley in the ardent and horrifying play that is The Cenci. Looking at the conventional application of the theories of the sublime to romantic writing will make evident the holes in the discussion of the sublime and romantic writings that have almost forgotten the powerful and psychological rhetorical aspect of the sublime that is emphasized in the theoretical writings of both Burke and Kant. To clarify what is traditionally associated with Shelley and the sublime, a brief analysis of the Shelleyean sublime and Shelley's 1816 poem "Mont Blanc" will prepare the reader for an unconventional, but every bit important and powerful, function of the sublime in the 1819 play The Cenci based on the horrific happenings of a historical 16th century Italian noble family.
Contributors
Gowan, Kaitlin (Author) / Lussier, Mark (Thesis advisor) / Corse, Douglas Taylor (Committee member) / Broglio, Ronald (Committee member) / Arizona State University (Publisher)
Created
2011
Description
This study examines the effect that the modality (volition, doubt, emotion, belief, knowledge, etc.) of matrix noun clauses has on the ability of intermediate (second-year) Spanish L2 students (n=56) to properly produce the subjunctive and indicative moods, the relative order in which students tend to most accurately produce the subjunctive in response to the modalities of volition, doubt, and emotion, and students' level of syntactic ability and mood development. Each participant took a test consisting of twenty questions containing various modalities intended to elicit either the subjunctive or indicative mood. Participants also filled out a questionnaire that was designed to ascertain the participants' level of formal and informal experience with Spanish. The results of this study show that a) when the subjunctive was the target response most participants favored the unmarked indicative mood significantly more than the marked subjunctive mood, b) students most accurately produced the subjunctive to the modality of volition (VL), followed by doubt (DT), and emotion (EM), which is consistent with Collentine's study, and c) students were able to process complex syntax when producing the unmarked indicative mood but not when they were prompted to produce the marked subjunctive mood. The results of this study show that pedagogical expectations regarding the acquisition of the subjunctive mood by second-year Spanish students may be unrealistic as these students were operating somewhere between the pre-syntactic and syntactic stages.
Contributors
Kaufman, John Henry (Author) / Lafford, Barbara (Thesis advisor) / García Fernandez, Carmen (Thesis advisor) / Elorrieta, Jabier (Committee member) / Arizona State University (Publisher)
Created
2011
Description
The Victorian era was the age of museum development in the United States. In the wake of these institutions, another important figure of the nineteenth century emerged--the flâneur. The flâneur represents the city, and provided new mechanisms of seeing to the public. The flâneur taught citizens how to gaze with a panoptic eye. The increasing importance of cultural institutions contributed to a new means of presenting power and interacting with the viewing public. Tony Bennett's exhibitionary complex theory, argues that nineteenth-century museums were institutions of power that educated, civilized, and through surveillance, encourage self-regulation of crowds. The flâneur's presence in the nineteenth century informed the public about modes of seeing and self-regulation--which in turn helped establish Bennett's theory inside the museum. The popular writing and literature of the time provides an opportunity to examine the extent of the exhibitionary complex and the flâneur. One of the most prominent nineteenth-century authors, Henry James, not only utilizes museums in his work, but he often uses them in just the manner Bennett puts forth in his theory. This is significant because the ideas about museums in James's work shaped the minds of an expanding literary public in the United States, and further educated, civilized, and regulated readers. James also represents the flâneur in his writing, which speaks to broader cultural implications of the both exhibitionary complex on the outside world, and the effects of broader cultural influences on the museum. Beyond the impact of James's work, in the late nineteenth century American culture increasingly became centered around the printed word. The central position of books in American culture at the end of the nineteenth century allowed books and libraries to appropriate the exhibitionary complex and become tools of power in their own right. The book and the library relate to the museum as part of a larger cultural environment, which emerged as a result of modernity and a response to the ever-changing nineteenth-century world.
Contributors
Harrison, Leah Gibbons (Author) / Szuter, Christine (Thesis advisor) / Warren-Findley, Jannelle (Committee member) / Toon, Richard (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Over the past decades, Colombian society has endured the impact of a longstanding political conflict among different actors and outrageous expressions of violence, especially among left wing guerrillas, right wing paramilitary groups and the state government. Drawing on socio-legal studies in transitional justice and human rights, this research attempts to analyze the recent experience of transitional justice in Colombia. The main purpose of this research is to understand how political, institutional and social actors, especially the government, the courts, the human rights and transitional justice NGOs, and victims associations, frame the mechanisms of transitional justice and use legal instruments to transform the conflict and reach what they consider "justice." It also attempts to understand the relations between politics and law in the context of a hegemonic discourse of security and give account of the expressions of resistance of human rights networks. In doing so, this research advances theory on literature about law and society and transitional justice by means of applying and expanding the theoretical framework of socio-legal research via the process of transitional justice in Colombia. The dissertation presents information gathered in the field in Colombia between July 2009 and July 2010 through a qualitative research design based on document analysis and in-depth interviews with members of different international and domestic human rights organizations, victims' organizations and national institutions. The research explains how these organizations combined political and legal actions in order to contest a project of security, and more specifically a project of impunity that came from negotiations with the paramilitary groups. The research also explains how the human rights networks not only mobilized internationally to gain political support from the international community, but also how these organizations contributed to transform the political debate about victims' rights. The research also explains how the human rights organizations and victims' groups articulated the global discourse on human rights and the local and domestic meanings constructed by the emerging movements of victims. Finally, the research analyses the relevance of legal practices consisting on strategic use of law in order to protect the victims of human rights violations.
Contributors
Gomez Sanchez, Gabriel (Author) / Lauderdale, Pat (Thesis advisor) / Vanna, Gonzales (Committee member) / Ladawn, Haglund (Committee member) / Jeffrey, Juris (Committee member) / Arizona State University (Publisher)
Created
2011
A bilingual, bicultural interpreter and researcher navigates blurry boundaries and intersectionality
Description
A researcher reflects using a close reading of interview transcripts and description to share what happened while participating in multiple roles in a larger ethnographic study of the acculturation process of deaf students in kindergarten classrooms in three countries. The course of this paper will focus on three instances that took place in Japan and America. The analysis of these examples will bring to light the concept of taking on multiple roles, including graduate research assistant, interpreter, cultural mediator, and sociolinguistic consultant within a research project serving to uncover challenging personal and professional dilemmas and crossing boundaries; the dual roles, interpreter and researcher being the primary focus. This analysis results in a brief look at a thought provoking, yet evolving task of the researcher/interpreter. Maintaining multiple roles in the study the researcher is able to potentially identify and contribute "hidden" knowledge that may have been overlooked by other members of the research team. Balancing these different roles become key implications when interpreting practice, ethical boundaries, and participant research at times the lines of separation are blurred.
Contributors
Hensley, Jennifer Scarboro (Author) / Tobin, Joseph (Thesis advisor) / Artiles, Alfredo (Committee member) / Horejes, Thomas (Committee member) / Arizona State University (Publisher)
Created
2011