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    Carleton University Library Archives & Special Collections (ASC)
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    Research and creative works by Carleton authors and researchers and the official repository for Carleton theses and dissertations
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Recent Submissions

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    Corporate Accountability During Crisis in the Digitized Era
    (Emerald, 2022-10-20) Firoozi, Maryam; Ku, Chih Hao
    Purpose Despite an increasing trend in adoption of social media by for-profit organizations and their chief executive officers (CEOs), there is little understanding of how these new channels of communication are incorporated into the broader communication domain of a firm to discharge accountability during a crisis, when accountability is of critical importance. More importantly, research on how people perceive a crisis and voice their opinions to firms and CEOs on social media in reaction to that crisis is rather limited. Therefore, in this study the authors investigate these questions. Design/methodology/approach This study is based on a case. The authors focus on the biggest data breach in Internet history in a pioneer technology firm, the Yahoo data breach. The authors conduct descriptive and dramaturgical analyses informed by Goffman to investigate how Yahoo manages its several front stages (communication channels), including social media during and after the Yahoo data breach announcements, and how people respond to the Yahoo's front stage management. Findings The results show that, during this crisis, Yahoo engages in management of its front stages by first limiting them to a few, then by redrawing the line between its back and front stages, and finally by expanding its front stages to include two-way communication channels, including social media. An ongoing accountability process back stage guides Yahoo's management of its front stages and undermines Yahoo's accountability in front stages. However, social media audiences challenge Yahoo's control of its front stages by using various frames to make sense of the crisis, and to demand accountability. Originality/value This study furthers the understanding of how social media platforms are positioned in a firm's broader communication channels during a crisis. It also enhances understanding of accountability demand, especially during critical times in a digitized era.
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    Air Pollution and Children: Neural and Tight Junction Antibodies and Combustion Metals, the Role of Barrier Breakdown and Brain Immunity in Neurodegeneration
    (IOS Press, 2014-12-02) Calderón-Garcidueñas, Lilian; Vojdani, Aristo; Blaurock-Busch, Eleonore; Busch, Yvette; Friedle, Albrecht; Franco-Lira, Maricela; Sarathi-Mukherjee, Partha; Martínez-Aguirre, Xavier; Park, Su-Bin; Torres-Jardón, Ricardo; D'Angiulli, Amedeo
    Millions of children are exposed to concentrations of air pollutants, including fine particulate matter (PM 2.5 ), above safety standards. In the Mexico City Metropolitan Area (MCMA) megacity, children show an early brain imbalance in oxidativestress, inflammation, innate and adaptive immune response-associated genes, and blood-brain barrier breakdown. We investigated serum and cerebrospinal fluid (CSF) antibodies to neural and tight junction proteins and environmental pollutants in 139 children ages 11.91 ± 4.2 y with high versus low air pollution exposures. We also measured metals in serum and CSF. MCMA children showed significantly higher serum actin IgG, occludin/zonulin 1 IgA, IgG, myelin oligodendrocyte glycoprotein IgG and IgM(p < 0.01), myelin basic protein IgA and IgG, S-100 IgG and IgM, and cerebellar IgG (p < 0.001). Serum IgG antibodies to formaldehyde, benzene, and bisphenol A, and concentrations of Ni and Cd were significantly higher in exposed children(p < 0.001). CSF MBP antibodies and nickel concentrations were higher in MCMA children (p = 0.03). Air pollution exposure damages epithelial and endothelial barriers and is a robust trigger of tight junction and neural antibodies. Cryptic ‘self’ tight junction antigens can trigger an autoimmune response potentially contributing to the neuroinflammatory and Alzheimer and Parkinson’s pathology hallmarks present in megacity children. The major factor determining the impact of neural antibodies is the integrity of the blood-brain barrier. Defining the air pollution linkage of the brain/immune system interactions and damage to physical and immunological barriers with short and long term neural detrimental effects to children’s brains ought to be of pressing importance for public health.
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    Channel Assignment Using Topology Control Based on Power Control in Wireless Mesh Networks
    (InTech, 2012-08-14) Chaudhry, Aizaz U.; Hafez, Roshdy H.M.
    In this section, an overview of Wireless Mesh Networks (WMNs) is presented, and some unique features which distinguish WMNs from Mobile Ad hoc Networks (MANETs) and Wireless Sensor Networks (WSNs) are listed. The main purpose of this chapter is discussed, and the contribution is presented along with the main features of this work.
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    The correlates of appearance focused self-concept: personality traits, self-concept, sociocultural, and early life experience factors
    (BioMed Central, 2024-08-02) Sarginson, Catherine; Nicoletta, Juliana; Charlebois, Thalia; Enouy, Sarah; Tabri, Nassim
    Background Theory and research indicate that an appearance focused self-concept (i.e., placing overriding importance on physical appearance for self-definition and self-worth) plays a role in the etiology and maintenance of disordered eating and eating disorders. Although the consequences of an appearance focused self-concept are palpable, less is known about its correlates. Accordingly, we examined a range of factors that may characterize appearance focused people, including personality traits (perfectionism, impulsivity, sensation-seeking, hopelessness, and anxiety sensitivity), self-concept (global self-esteem and self-concept clarity), sociocultural (thin-ideal, muscular-ideal, general attractiveness internalizations, and perceived pressure to be thin), and early life experiences (adverse childhood experiences, attachment styles) factors. Methods Female undergraduate university students (N = 568; Mage = 19.58, SDage = 4.24) completed a questionnaire battery that included the Beliefs About Appearance Scale, Depressive Experiences Questionnaire–Self-Criticism-6 Scale, Frost-Multidimensional Perfectionism Scale, the Revised Almost Perfect Scale, Substance Use Risk Profile Scale, Self-Concept Clarity Scale, Rosenberg Self-Esteem Scale, Sociocultural Attitudes Towards Appearance Questionnaire-4 Scale, Adverse Childhood Experiences Questionnaire, Experiences in Close Relationships Scale Short Form, and the Dietary Restraint subscale of the Eating Disorders Examination Questionnaire. Results Multiple regression analyses were conducted for each set of factors separately and together. For personality traits, perfectionism, impulsivity, and anxiety sensitivity were uniquely associated with appearance focused self-concept. For self-concept, global self-esteem and self-concept clarity were uniquely associated with appearance focused self-concept. For sociocultural, general attractiveness internalization, thin-ideal internalization, and perceived pressure to be thin were uniquely associated with appearance focused self-concept. For early life experiences, attachment anxiety and avoidance were uniquely associated with appearance focused self-concept. In the combined analysis, the various factors explained 54% of the variance in appearance focused self-concept. Impulsivity, global self-esteem, general attractiveness internalization, and perceived pressure to be thin were uniquely associated with appearance focused self-concept. Conclusions Results for global self-esteem were consistent with prior research. Findings for evaluative concerns perfectionism were inconsistent with prior research. We discuss future research directions to examine the link between evaluative concerns perfectionism and appearance focused self-concept. We also discuss how sociocultural factors (general attractiveness internalization and perceived pressure to be thin) and impulsivity may help cultivate an appearance focused self-concept, advancing knowledge on the characteristics of appearance-focused people.
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    Dynamic mechanisms that couple the brain and breathing to the external environment
    (Nature Research, 2024-08-03) Goheen, Josh; Wolman, Angelika; Angeletti, Lorenzo Lucherini; Wolff, Annemarie; Anderson, John A.E.; Northoff, George
    Brain and breathing activities are closely related. However, the exact neurophysiological mechanisms that couple the brain and breathing to stimuli in the external environment are not yet agreed upon. Our data support that synchronization and dynamic attunement are two key mechanisms that couple local brain activity and breathing to external periodic stimuli. First, we review the existing literature, which provides strong evidence for the synchronization of brain and breathing in terms of coherence, cross-frequency coupling and phase-based entrainment. Second, using EEG and breathing data, we show that both the lungs and localized brain activity at the Cz channel attune the temporal structure of their power spectra to the periodic structure of external auditory inputs. We highlight the role of dynamic attunement in playing a key role in coordinating the tripartite temporal alignment of localized brain activity, breathing and input dynamics across longer timescales like minutes. Overall, this perspective sheds light on potential mechanisms of brain-breathing coupling and its alignment to stimuli in the external environment.