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Properties of (claw, 4K₁, bridge)-free graphs
Get PDFGiven a set H of graphs, a graph G is H-free if it does not contain any graph in H as an induced subgraph. The complexity of the colouring problem is known when H is a set of graphs on four vertices, with three exceptions. One of those exceptions is the case of {claw, 4K1}-free graphs, for which our classes of {claw, 4K1, bridge}-free and {claw, 4K1, bridge,C4-twin}-free graphs are subclasses.
The original goal of this work was to prove that {claw, 4K1, bridge}-free graphs can be coloured in polynomial-time. We prove this for a subclass where the graph contains a cycle on seven vertices. We then look at a slightly larger set H that includes the graph called C4-twin. Using clique-width and theorems on perfect graphs, we show that {claw, 4K1, bridge, C4-twin}-free graphs are either perfect or have bounded clique-width and can thus be coloured in polynomial time
Soldiering On After the Armistice: Health, Work and Family in the Lives of Some Canadian Army Medical Corps Nurse Veterans
Get PDFThis article analyses the federal government pension files of forty Canadian women who nursed for the Canadian Army Medical Corps (CAMC), exploring aspects of their health, work and family lives in the decades immediately following the First World War. The sample exclusively features nurses with ties to the region of Southwestern Ontario but in demographic terms is also largely representative of the entire body of CAMC nurses. Collectively, the files depict nurse veterans who mobilized their medical knowledge and professional networks when faced with challenging health situations, pursued diverse postwar employment strategies, and in some cases played crucial roles in the financial support of their kin. Clearly, the First World War did not discriminate by gender when it came to casting a long shadow over the health, careers and family relationships of those who served
The Power of Dissent: Mitigating False Polarization and Cross-Party Dislike in Online Interactions
Get PDFWhile actual polarization is on the rise in the United States, perceived polarization (i.e., false polarization) is growing at an even faster rate, contributing to increased cross-party hostility. A meaningful amount of out-party dislike may be produced by partisans’ dramatic overestimates of the prevalence of extreme, undesirable views among political opponents. In the current research, we examine whether exposing people to out-party dissenters who challenge their copartisans’ extreme views might help reduce people’s misperceptions of their opponents’ extreme views, and possibly mitigate animosity. Across five studies (N = 3789), we explore how seeing public ingroup dissent (in the form of responses to an extreme tweet) changes the (mis)perceived prevalence of the extreme attitude amongst the opponent group. For both liberals and conservatives, seeing an interaction wherein a single political opponent disagreed with a (presumed) widely held extreme tweet lowered their estimates of how prevalent that attitude was, compared to seeing the tweet alone (Studies 1 and 2). This effect was strengthened when participants saw a “dogpile” of dissent, where multiple out-party members dissented against the extreme out-party tweet, compared to a single response, or no response at all (Studies 3, 4, & 5). The dissent condition did not directly affect feelings towards opponents, or willingness to engage with them. However, a serial mediation model revealed that exposure to dissent indirectly affected willingness to engage by reducing prevalence (over)estimates and, in turn, liking. Specifically, participants who saw opponent dissent lowered their estimates of opponent agreement with the extreme tweet; lower estimates were related to more positive feelings towards opponents, and more positive feelings were subsequently related to greater willingness to engage across the aisle
Sales Enablement in Entrepreneurial Ventures: Essays on The Role of Social Capital and Resilience in Disruptive Environments
No full textEnduring commercial success of entrepreneurial ventures is often associated with effective selling and an ability to navigate dynamic environments. However, two challenges stand out: 1) effectively managing cross-functional integration of sales with other value-creating organizational functions, given that selling in the contemporary organization is a multi-actor, strategic effort, and 2) being resilient to environmental disruptions, given the increasing frequency of their occurrence. I take a sales enablement perspective to focus on themes which are essential to optimizing sales performance in entrepreneurial ventures. The first theme focuses on internal social capital embedded in the cross-functional relationships of the sales, marketing, and R&D, functions. The second addresses resilience at the organizational and individual levels.
These themes are explored across two essays. The first essay views organizational resilience of entrepreneurial ventures as a resource-based capability. I examine psychological capital (individual resilience of members of top management) and internal social capital (inter-functional coordination among sales, marketing, and R&D) as drivers of organizational resilience. I also study the influence of organizational resilience on the sales performance of entrepreneurial ventures amidst an adverse external disruption.
Cross-functional integration is central to the sales enablement perspective. Therefore, the second essay builds on the findings from the first to conduct an extensive analysis of internal social capital among sales, marketing, and R&D. Across two interrelated studies, this essay draws on the social capital and social identity theories to show how the structural, relational, and cognitive dimensions of social capital are linked with employees’ organizational identification.
Across four chapters, I discuss the theoretical and managerial contributions derived from the findings of this dissertation and outline the resultant opportunities for future research
Living Out Confessional Lutheranism: Past Experiences and Current Questions
Get PDFThis Article includes the Introduction by Rev. Dr. Stephen Larson and the feature Paper presentation by Rev. Dr. Gordon Jensen as delivered in Webinar 2 (November 15, 2022) of the Webinar Series “For the Sake of the Gospel” hosted by the Remembering Today for the Church of Tomorrow Project in partnership with Martin Luther University College and Lutheran Theological Seminary. Themes from this presentation appear in many of the articles in this Issue
Remembering Canadian Lutheran World Relief—Relationships: Mid-Century Concord and Discord, A Propositional History
Get PDFThis paper extends from a presentation prepared for Webinar II (November 15, 2022) of the Webinar Series “For the Sake of the Gospel” hosted by the Remembering Today for the Church of Tomorrow Project in partnership with Martin Luther University College and Lutheran Theological Seminary. The original presentation featured images, some of which are presented herein
Operational Research and Counter-Battery Fires in the Canadian Corps, 1917-18
Get PDFThis article examines the operational research conducted by the counter-battery staff office (CBO) in the headquarters of the Canadian Corps during the First World War. It challenges the argument presented by most historians of operational research, who contend that the discipline originated with the 1935 Tizard Committee and came to fruition during the Second World War and expands upon the initial inquiry performed by scholars J.S. Finan and W.J. Hurley in a 1997 journal article. While the staff of the CBO never used the term “operational research” to describe their scientific studies, they were undoubtedly its practitioners through their innovating, trialling, experimentation and dissemination of knowledge–the four pillars of the discipline. These artillerymen applied science to their weapon systems and, in doing so, made them as efficient and effective as possible. And they shared best practices with other formations in the British Expeditionary Force. Through their studies, the Canadian Corps perfected the use of counter-battery fire to attrit the German Army and strike their most important systems. Several of the studies conducted by these staff officers were mirrored by investigations carried out by No. 2 Operational Research Section during the Second World War. As a result, this study offers a new interpretation of adaptation to technology, scientific approach to operations and learning within the Canadian Corps during the First World War
A Documentary History of the Badge of the Canadian Army
Get PDFThe general badge of the Canadian Army has undergone a number of changes over the years in response to changes in the status of the land forces of Canada. The most significant of these changes was the disestablishment of the Army as an independent service with unification in 1968. An impressive amount of documentation records the decisions taken with respect to the badge of Mobile Command, a design unlike its predecessor, which had been based on that of the British Army. The demise of Mobile Command saw a return to patterns based on the original design with crossed swords
No. 08: Young People’s Mobilities, Farming Aspirations and Engagements in Northern Ghana
No full textDevelopment policies targeting young people and African agriculture tend to focus on their abandonment of the sector and the need to attract new generations to agricultural activities through its commercialization. This paper points to potential gaps in such interventions by investigating the diverse mobilities, aspirations, and engagements of young people in farming, through a qualitative case study in rural northern Ghana. Our study also challenges the prevalent assumption of African farmers’ movements from rural to rural areas, from rural to urban areas, and out of farming altogether, as we found evidence of young people migrating from urban to rural areas. We also show that the intersection of generation, place and gender unevenly shaped young people’s movements to and away from rural areas, along with the broad patterns of their involvement with farming