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Parallel Trend (parallel + trend)
Selected AbstractsHuman Rights of Migrants: Challenges of the New DecadeINTERNATIONAL MIGRATION, Issue 6 2001Patrick A. Taran This review summarizes main trends, issues, debates, actors and initiatives regarding recognition and extension of protection of the human rights of migrants. Its premise is that the rule of law and universal notions of human rights are essential foundations for democratic society and social peace. Evidence demonstrates that violations of migrants' human rights are so widespread and commonplace that they are a defining feature of international migration today. About 150 million persons live outside their countries; in many States, legal application of human rights norms to non-citizens is inadequate or seriously deficient, especially regarding irregular migrants. Extensive hostility against, abuse of and violence towards migrants and other non-nationals has become much more visible worldwide in recent years. Research, documentation and analysis of the character and extent of problems and of effective remedies remain minimal. Resistance to recognition of migrants' rights is bound up in exploitation of migrants in marginal, low status, inadequately regulated or illegal sectors of economic activity. Unauthorized migrants are often treated as a reserve of flexible labour, outside the protection of labour safety, health, minimum wage and other standards, and easily deportable. Evidence on globalization points to worsening migration pressures in many parts of the world. Processes integral to globalization have intensified disruptive effects of modernization and capitalist development, contributing to economic insecurity and displacement for many. Extension of principles in the Universal Declaration of Human Rights culminated in the 1990 International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families. With little attention, progress in ratifications was very slow until two years ago. A global campaign revived attention; entry into force is likely in 2001. Comparative analysis notes that ILO migrant worker Conventions have generally achieved objectives but States have resisted adoption of any standards on treatment of non-nationals. A counter-offensive against human rights as universal, indivisible and inalienable underlies resistance to extension of human rights protection to migrants. A parallel trend is deliberate association of migration and migrants with criminality. Trafficking has emerged as a global theme contextualizing migration in a framework of combatting organized crime and criminality, subordinating human rights protections to control and anti-crime measures. Intergovernmental cooperation on migration "management" is expanding rapidly, with functioning regional intergovernmental consultative processes in all regions, generally focused on strengthening inter-state cooperation in controlling and preventing irregular migration through improved border controls, information sharing, return agreements and other measures. Efforts to defend human rights of migrants and combat xenophobia remain fragmented, limited in impact and starved of resources. Nonetheless, NGOs in all regions provide orientation, services and assistance to migrants, public education and advocating respect for migrants rights and dignity. Several international initiatives now highlight migrant protection concerns, notably the UN Special Rapporteur on Human Rights of Migrants, the Global Campaign promoting the 1990 UN Convention, UN General Assembly proclamation of International Migrants Day, the 2001 World Conference Against Racism and Xenophobia, anti-discrimination activity by ILO, and training by IOM. Suggestions to governments emphasize the need to define comprehensive, coordinated migration policy and practice based on economic, social and development concerns rather than reactive control measures to ensure beneficial migration, social harmony, and dignified treatment of nationals and non-nationals. NGOs, businesses, trade unions, and religious groups are urged to advocate respect for international standards, professionalize services and capacities, take leadership in opposing xenophobic behaviour, and join international initiatives. Need for increased attention to migrants rights initiatives and inter-agency cooperation by international organizations is also noted. [source] Host plant quality and defence against parasitoids: no relationship between levels of parasitism and a geometrid defoliator immunoassayOIKOS, Issue 6 2008Netta Klemola Host plant quality has a major influence on the performance, and ultimately on the fitness of an herbivorous insect, but may also have indirect effects on the third trophic level by affecting an herbivore's defensive ability against natural enemies. In a three-year field study, we examined the effects of natural food quality on the ability of autumnal moths, Epirrita autumnata (Lepidoptera, Geometridae), to defend themselves against parasitoids. In each year, we confirmed the variation in quality of host trees (mountain birch, Betulapubescens ssp. czerepanovii) by determining the mass of pupae reared in mesh bags attached to the trees and the water content of leaves. Individuals grown on high quality trees possessed significantly higher encapsulation rate of a foreign antigen as pupae compared to those on low quality trees during the first and third study years; a parallel trend was also found in the second study year, although this difference was not statistically significant. However, in spite of observed differences in encapsulation rates, individuals reared on high and low quality trees did not differ in their levels of parasitisation when exposed to hymenopteran parasioids in the wild and thus were equally vulnerable. Accordingly, the encapsulation response seems not to play a major role on the population ecology scale in the studied system. Our findings also stress the importance of direct resistance tests, which should be conducted along with tests of insect immune function. [source] Magnetic resonance angiography in reversible cerebral vasoconstriction syndromesANNALS OF NEUROLOGY, Issue 5 2010Shih-Pin Chen MD Objective To investigate the evolution and clinical significance of vasoconstriction on magnetic resonance angiography (MRA) in patients with reversible cerebral vasoconstriction syndromes (RCVS). Methods Patients with RCVS were recruited and followed up with MRA examinations until normalization of vasoconstriction or for 6 months. The vasoconstriction severity of the major cerebral arterial segments (M1, M2, A1, A2, P1, P2, and basilar artery) was scored on a 5-point scale: 0 (0,<10%), 1 (10,<25%), 2 (25,<50%), 3 (50,<75%), and 4 (,75%). Subjects with at least 1 segment with a vasoconstriction score ,2 were eligible for the study. Initial mean scores of single or combined arterial segments were used to predict ischemic complications. Results Seventy-seven patients with RCVS (8 men/69 women; average age 47.7 ± 11.6 years) finished the study with a total of 225 MRAs performed. The mean number of arterial segments involved was 5.3 ± 3.0 in the initial MRA. Vasoconstriction scores reached their maximum 16.3 ± 10.2 days after headache onset, close to the average timing of headache resolution (16.7 ± 8.6 days). Vasoconstriction evolved in a parallel trend among different arterial segments. Seven (9.1%) patients developed posterior reversible encephalopathy syndromes (PRES). Six (7.8%) patients had ischemic stroke. A logistic regression model demonstrated that the M1,P2 combined score was associated with highest risk of PRES (odds ratio [OR], 11.6, p = 0.005) and ischemic stroke (OR, 3.4; p = 0.026). Interpretation MRA evaluation in patients with RCVS is valid. Vasoconstriction was pervasive and outlasted headache resolution. Vasoconstrictions in M1 and P2 are important determinants for PRES and ischemic stroke. ANN NEUROL 2010;67:648,656 [source] Potential selection in native grass populations by exotic invasionMOLECULAR ECOLOGY, Issue 8 2006BRIAN A. MEALOR Abstract Ecological impacts of invasive plant species are well documented, but the genetic response of native species to invasive dominance has been often overlooked. Invasive plants can drastically alter site conditions where they reach dominance, potentially exerting novel selective pressures on persistent native plant populations. Do native plant populations in old exotic invasions show evidence of selection when compared to conspecific populations in adjacent, noninvaded areas? We employ amplified fragment length polymorphism (AFLP) analysis to screen a large number of loci from two native grass species (Hesperostipa comata (Trin. & Rupr.) Barkworth and Sporobolus airoides Torr.) that occur in old infestations of the invasive forb Acroptilon repens. We then compare observed locus by locus FST values with distributions of FST estimated from simulation models under expectation of neutrality. We also compare the proportion of loci possibly linked to selection and those not linked to selection which exhibit parallel trends in divergence between two community types (invaded, noninvaded). Few loci (H. comata, 2.6%; S. airoides, 8.7%) in the two native grasses may be linked to genes under the influence of selection. Also, loci linked to selection showed a greater portion of parallel trends in divergence than neutral loci. Genetic similarities between community types were less than genetic similarity within community types suggesting differentiation in response to community alteration. These results indicate that a small portion of scored AFLP loci may be linked to genes undergoing selection tied to community dominance by an invasive species. We propose that native plants in communities dominated by exotic invasives may be undergoing natural selection. [source] THE PROBLEM OF OVERSKILLING IN AUSTRALIA AND BRITAINTHE MANCHESTER SCHOOL, Issue 3 2010KOSTAS MAVROMARAS In this paper we examine the parallel trends in education and labour market developments in Australia and Britain using unique information on reported overskilling in the workplace. To a degree, the overskilling information overcomes the problem of unobserved ability differences and focuses on the actual job,employee mismatch more than the conventional overeducation variables can. The paper finds that the prevalence of overskilling decreases with education at least for Australia, but the wage penalty associated with overskilling increases with education. Although the prevalence of overskilling differs between Australia and Britain, the pattern of the wage penalties is fairly similar in both countries. [source] | ||||||||||