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In this study, we relax one of the general assumptions in the hub location literature by allowing routed flows between nonhub nodes. In hub networks, different flows are consolidated and routed via collection, interhub, and distribution arcs. Due to consolidation, some flows travel long paths despite closeness of their origin and destination. In this study, we allow direct flows by penalizing by a scalar factor of original cost of transshipment between these arcs. We present mathematical models for median, center, and set covering versions of the problem for single‐ and multi‐allocation cases. We test the models with the CAB and TR data sets. We discuss the properties of established direct connections for different models by using another mathematical model where the number of direct flows is bounded and interpret the effect of changes in problem parameters.  相似文献   
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Despite similar permanent status immigration categories (Economic, Family, and Refugee), the experiences of skilled immigrants in Canada and the United States are quite different. The point system used to select applicants for the Economic Class in Canada makes skilled immigrants vulnerable to a number of perils after the migrant lands. Foreign credentials and work experience are discounted by Canadian employers, who also impose a discriminatory income penalty on minorities. While previous cohorts of Economic Class migrants may have been warned of these perils via reliable migrant networks, new Canadian research suggests that recent cohorts have no such safety net. This article examines the economic integration experiences of Economic Class migrants in the United States in light of the Canadian experiences. The vulnerabilities reported in Canada do not appear to be transferable to the United States, because immigration policy in the US stresses pre-landing employment commitments via employer sponsorship. Accordingly, prospective Economic Class migrants to the United States do not migrate without first knowing how their credentials and “minority status” will affect employment opportunities. However, for the 85,000 skilled workers admitted to the United States on H-1B temporary visas each year, the perils noted in the Canadian experience are relevant, as are a number of additional concerns.  相似文献   
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In feminist theory, the “female gaze” is a reaction to the imbalance of power created by the “male gaze”. Yet, since the concept lacks sound grounding in theory, it solely poses “a simple (antagonistic) response” to male voyeurism. This article traces the manifestations of the female gaze in Lost Highway and The Blind Owl, a film noir and a novella. It is concluded that instead of offsetting the imbalance of power, the female gaze only reverses it, turning the concept into yet another catchphrase of patriarchal hegemony to further commodify and subjugate women.  相似文献   
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ABSTRACT Many databases involve ordered discrete responses in a temporal and spatial context, including, for example, land development intensity levels, vehicle ownership, and pavement conditions. An appreciation of such behaviors requires rigorous statistical methods, recognizing spatial effects and dynamic processes. This study develops a dynamic spatial‐ordered probit (DSOP) model in order to capture patterns of spatial and temporal autocorrelation in ordered categorical response data. This model is estimated in a Bayesian framework using Gibbs sampling and data augmentation, in order to generate all autocorrelated latent variables. It incorporates spatial effects in an ordered probit model by allowing for interregional spatial interactions and heteroskedasticity, along with random effects across regions or any clusters of observational units. The model assumes an autoregressive, AR(1), process across latent response values, thereby recognizing time‐series dynamics in panel data sets. The model code and estimation approach is tested on simulated data sets, in order to reproduce known parameter values and provide insights into estimation performance, yielding much more accurate estimates than standard, nonspatial techniques. The proposed and tested DSOP model is felt to be a significant contribution to the field of spatial econometrics, where binary applications (for discrete response data) have been seen as the cutting edge. The Bayesian framework and Gibbs sampling techniques used here permit such complexity, in world of two‐dimensional autocorrelation.  相似文献   
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Based on the affirmation in the scholarship of teaching and learning that adding research component into early geography classes is mutually beneficial to both instructors and students, this paper presents a case study that quantitatively articulates the effects of adding a research project into a first-year physical geography class on students’ academic performance. Pushing research into earlier stages of undergraduate students’ academics, even in large classes, can be very beneficial yet challenging because most students at this level have no experience in research; plus, they may still be adjusting to university life. Part of the Undergraduate Research Initiative called First Year Research Experience (FYRE) at the University of Saskatchewan in Canada invited faculty to embed a research component into first year undergraduate classes to align research and teaching. A two-year endeavour in a first year physical geography class resulted in some interesting outcomes. (1) The most challenging part of research for students was the research question formation. (2) Students valued the opportunity to conduct a research project. (3) Doing in-class research actually improved student performance as seen in the higher overall average grades. (4) Students who attained the highest exam marks were not those who attained the highest research project marks.  相似文献   
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In this article we examine the decisions made by the 85 United States representatives from the 13 states from which United States senators were retiring in 1996 and by the 137 representatives from states holding Senate elections in which incumbents were seeking reelection. We use these data to examine individual-level decision making in order to reassess the conventional wisdom on progressive ambition of House members. Using a decision calculus derived from previous studies, we are able to understand the decisions made by all but a handful of the representatives under study. These findings should prove useful in predicting which representatives will exhibit progressive ambition in the future.  相似文献   
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Hilal Kara  Beverley Mullings 《对极》2023,55(4):1047-1067
Despite dramatic increases in university graduates over the last 30 years, unemployment rates among youth with advanced education in Turkey remain some of the highest in the world. With levels of unemployment among university graduates almost equal that of high school graduates, the promise of social mobility and formal waged work that higher education once promised, no longer holds credibility. Many young people, instead find themselves in waithood—a state characterised by uncertainty, joblessness, and obstacles to independent adulthood. Studies tend to view waithood temporally as a period of indeterminacy and frustrated futures, but we argue, waithood also encompasses spatial dimensions that are liberatory in so far as they communicate a demand for a liveable life. Examining how young women in Turkey navigate both the state’s conservative politics, and restricted employment opportunities, we use the term “wait space” to capture what an attentiveness to the intimate connection between space and time and work offers to our understanding of the politics and possibilities of work beyond the wage.  相似文献   
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Relying on fragmented archival records, this article examines the life of Mr X – an intersex Kenyan – who was raised as a girl but, after a surgical operation in London in 1968, became a man. With assistance from officials, the wealthy and well-educated Mr X received new identity documents, which recognised him as male and, in turn, preferential land access. Mr X's story makes clear the importance of class in decolonising Kenya and reveals how state power could deeply shape Kenyan lives. Indeed, the state produced most of the archival traces on Mr X's life. This history not only offers rare insight into the life of an intersex Kenyan in the mid-twentieth century, but it also raises questions about biography and historical evidence, how we piece together human stories in spite of the epistemology and erasure of the archives, and how we do so ethically. Given ethical concerns about maintaining Mr X's anonymity to protect his family from stigmatisation and discrimination, I withhold some available information. Where possible, though, I enrich the evidentiary fragments by rendering the context in detail and drawing on comparative contemporaneous accounts of intersex Kenyans. The conclusion explores contemporary Kenya's legal recognition of intersex identity and gestures to the building of a new intersex archive.  相似文献   
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