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81.
Xinyun Wu Shengfeng Yan Xin Wan Zhipeng Lü 《Journal of Combinatorial Optimization》2016,32(2):445-468
The routing and wavelength assignment problem (RWA) has shown to be NP-hard if the wavelength continuity constraint and the objective of minimizing the number of wavelengths are considered. This paper introduces a multi-neighborhood based iterated tabu search algorithm (MN-ITS), which consists of three neighborhoods with a unified incremental evaluation method, to solve the min-RWA problem. The proposed MN-ITS algorithm is tested on a set of widely studied real world instances as well as a set of challenging random ones in the literature. Comparison with other reference algorithms shows that the MN-ITS algorithm is able to improve five best upper bounds obtained by other competitive reference algorithms in the literature. This paper also presents an analysis to show the significance of the unified incremental evaluation technique and the combination of multiple neighborhoods. 相似文献
82.
This article explores whether it is possible to use a theoretical framework drawn from disability studies to understand experiences of social oppression on the grounds of mental distress. Thomas’ extended social relational theoretisation of disablism was used in a PhD project concerned with experiences of mental distress. The tentative conclusion was that Thomas’ conceptualisation of disablism and impairment could offer a way of improving understanding of mental distress and oppression on the grounds of mental distress. However, Thomas and Reeve’s theorisation of the different forms of disablism was not readily transferred to the field of mental distress. Thus, tentative definitions of the different forms of disablism in relation to the field of mental distress were created. Perceived impairment type and disablism appear to be interconnected, and one has to acknowledge what kind of perceived impairment type one is focusing on when theorising disability and the different types of disablism. 相似文献
83.
The no-wait job shop problem (NWJS-R) considered here is a version of the job shop scheduling problem where, for any two operations of a job, a fixed time lag between their starting times is prescribed. Also, sequence-dependent set-up times between consecutive operations on a machine can be present. The problem consists in finding a schedule that minimizes a general regular objective function. We study the so-called optimal job insertion problem in the NWJS-R and prove that this problem is solvable in polynomial time by a very efficient algorithm, generalizing a result we obtained in the case of a makespan objective. We then propose a large neighborhood local search method for the NWJS-R based on the optimal job insertion algorithm and present extensive numerical results that compare favorably with current benchmarks when available. 相似文献
84.
Utz Schäffer Jan-Philipp Lüdtke Diedrich Bremer Matthias Häußler 《Zeitschrift für Betriebswirtschaft》2012,82(1):47-73
This paper investigates the influence of accounting standards on systematic earnings understatement. To isolate the effect
of reporting regulations from those of other institutional drivers of earnings management, Holthausen (2003) proposes analyzing
reporting practices in a country undergoing a transition in accounting standards. We respond to this call by analyzing earnings
management practices of large German-listed companies before and after their transitions from German GAAP to IFRS. Specifically,
we focus on Big Bath behavior following Chief Financial Officer turnovers between 1999 and 2006. Our findings provide evidence
of the effect of accounting standards on the existence of this particular earnings understatement pattern. However, while
we detect Big Bath behavior for our sample of German GAAP firms, we find no such indication for those firms reporting under
IFRS. Controlling for alternative explanations such as self-selection bias does not change our findings. We conclude that
accounting standards seem to have a considerable influence on earnings management behavior, independent of managers’ and auditors’
incentives. 相似文献
85.
Prior research suggests that congregational characteristics are associated with the racial attitudes of Black churchgoers. This study examines the relationship between congregational diversity and beliefs about the Black/White socioeconomic gap among Black religious adherents. Drawing upon pooled data from the General Social Survey and the National Congregations Study, we fit binary logistic regression models to estimate the association between congregational diversity and the explanations of Black/White economic inequality among Black religious adherents. Findings from our study reveal that congregational diversity is one factor that accounts for intragroup differences in racial attitudes among Black religious affiliates. Relative to Blacks that attend religious services in overwhelmingly Black congregations, Blacks that attend religious services in congregations that are overwhelmingly White are significantly less likely to attribute Black/White socioeconomic gaps to a lack of educational opportunities. Our study demonstrates that congregational diversity is a source of intragroup variation in racial attitudes among Black religious affiliates, which may attenuate the ability of such congregations to bridge racial divisions. 相似文献
86.
This article asks what strategies are available to dominated actors in fields of cultural production. Using archival and biographical materials on Ottoman/Turkish women intellectuals, we show that they effectively used, depending on their social and cultural capital and their past practices, at least four strategies. Apart from the well-theorized strategy of subversion, they could also deploy acquiescence, collaboration, and defiance. These four strategies, we argue, constitute a two-dimensional space defined by loyalty vs. resistance on one hand and the overtness vs. covertness of loyalty or resistance on the other. While much of this space is best understood in terms of reciprocal social exchange, the assumptions of exchange break down in the case of overt resistance, showing that strategy goes beyond negotiation and that the understanding of power as always-already implicated with resistance has limits. 相似文献
87.
88.
Gülay Türkmen 《Qualitative sociology》2018,41(4):569-591
This article is an inquiry into understanding why supranational religious identity often fails to act as a conflict resolution tool in religiously homogenous ethnic conflicts. Narrowing its focus down to the role of religious elites as potential peacemakers in such conflict zones, it proposes the divergence in their conceptualizations of religious and ethnic identities as an explanatory factor. Building on 62 in-depth interviews conducted in Turkey with Sunni Muslim Kurdish and Turkish religious elites, it identifies a three-fold typology of religious and ethnic identities, as conceptualized by these elites: 1) religio-ethnic; 2) ethno-religious; 3) religious. After exemplifying each category with interview data it demonstrates the role these distinctions play in preventing the successful implementation of “Muslim fraternity” as a solution to the Kurdish conflict in Turkey. With these findings, the article contributes to both the literature on religion in conflict resolution and that on identity formation and boundary making. While it invites the former to turn its gaze from macro-level structural factors to meso- and micro-level cultural factors in analyzing religious elite involvement in conflict resolution, it invites the latter to stop employing “ethnicity” as an all-encompassing term (that covers a vast array of identity markers including religion) and focus, instead, on the gradations between religion and ethnicity as sources of identity. 相似文献
89.
Günther Josef Mohr 《Organisationsberatung, Supervision, Coaching》2016,23(4):411-426
In the article results of resilience research are presented and a systemic concept of resilience is derived, which differentiates the term from other models regarding psychic health. The resilience square shows essential factors for resilience. Based on this the idea of resilience is transferred to systems and organizations. The article deepens the resilience approach of Mohr (2016). 相似文献
90.
Jörg Blasius Jürgen Friedrichs Heiko Rühl 《KZfSS K?lner Zeitschrift für Soziologie und Sozialpsychologie》2016,68(3):541-559
We examine the process of Gentrification in two residential areas of Cologne, Germany: Deutz and Mülheim. The theory underlying the study is a phase (or stage) model of Gentrification in which indicators and their values are attributed to each phase. The hypotheses derived from the model pertain to changes in the social structure, rents and the spatial distribution of social groups such as “pioneers”, “gentrifiers” and “others”. We further assume both areas to be in different phases of Gentrification. 相似文献