88 research outputs found
The Best Part of Life : Subsistence Hunting, Ethnicity, and Economic Adaptation among Young Adult Inuit Males
This paper examines the economic adaptations and subsistence hunting involvement of households between the ages of 20 and 35 in the Copper Inuit community of Holman. Social, economic, and political changes throughout the Canadian Arctic have made it impossible for young adults to pursue the same mixed economic strategies as previous generations. A general decrease in subsistence hunting involvement is characteristic of the younger generation. Nevertheless, some young householders have made a conscious effort to remain active in subsistence hunting and fishing to provide for themselves and related households. Some have even increased subsistence hunting involvement as their own parents age and become increasingly infirm. Other householders are less active in hunting and fishing, but continue to view land-based harvesting as central to a sense of Inuit identity. The motivations, economic position, and family background of a sample of active and less active young adult hunters are explored in an attempt to understand the pressures experienced by young adults as they strive to make a place in a northern society radically different from that of their parents at a similar age. While the authors recognize the economic value of subsistence harvesting and the foods that result from it, we also emphasize the less easily quantified dimensions of subsistence ideology and its impact upon physical health, psychological well-being, and community integration.Key words: subsistence, harvest effort, Inuit identity, young adults, food sharing, health, self-esteemCet article examine les adaptations économiques et l'activité de chasse de subsistance de chefs de ménage âgés de 20 à 35 ans, dans la communauté Copper Inuit de Holman. Les changements sociaux, économiques et politiques qui ont eu lieu dans tout l'Arctique canadien ont fait qu'il est impossible pour les jeunes adultes de poursuivre les mêmes stratégies d'économie mixte que les générations précédentes. La génération la plus jeune se caractérise par une diminution généralisée de l'activité de chasse de subsistance. Néanmoins, certains jeunes chefs de ménage ont fait un effort conscient pour poursuivre la chasse et la pêche de subsistance afin de subvenir à leurs propres besoins et à ceux de ménages apparentés. Certains consacrent même plus de temps à la chasse de subsistance à mesure que leurs propres parents vieillissent et deviennent physiquement incapables de se livrer à ces activités. D'autres chefs de ménage se consacrent maintenant moins à la chasse et à la pêche, mais continuent de considérer le prélèvement des ressources naturelles comme essentielle à l'identité inuit. On a exploré les motivations, la situation économique et les antécédents familiaux d'un échantillon de jeunes chasseurs adultes, certains plus actifs que d'autres, afin d'essayer de comprendre les pressions ressenties par les jeunes adultes alors qu'ils luttent pour se faire une place dans une société nordique radicalement différente de celle de leurs parents au même âge. Bien que les auteurs reconnaissent la valeur économique de la récolte de subsistance et de la nourriture qui en résulte, ils insistent aussi sur la dimension plus difficile à qualifier de l'idéologie de subsistance, et sur ses retombées sur la santé physique, le bien-être psychologique et l'intégration de la collectivité.Mots clés: subsistance, temps consacré au prélèvement, identité inuit, jeunes adultes, partage de la nourriture, santé, estime de so
Cross Sector Service Coordination for People with High and Complex Needs: Harnessing Existing Evidence and Knowledge
People with high and complex needs will generally need an array of supports to enable social and economic participation as envisaged by the National Disability Insurance Scheme (NDIS). As participants, these people will receive funding from the NDIS to purchase services and supports from a range of different disability sector providers, but will also need to access various 'mainstream’ services including health, education, housing, justice and transport in order to pursue the life they choose. The complexity of the services system, and the interfaces between sectors, create gaps and barriers that are challenging for participants, service providers and for policy makers alike to navigate. Cross-sector coordination is a critical scheme design element to ensure that NDIS participants get the range of services and supports they need to pursue their goals and participate in society and the economy. Any failure of other sectors to provide access to quality services will increase the costs of disability support and risk the sustainability of the NDIS. Coordination can thus also be seen as a way of addressing this fundamental risk facing the NDIS. For these reasons cross-sector coordination should be a core element in NDIS design. The disability field is actively discussing these challenges and this paper aims to provide evidence to inform policy directions now being developed.The Centre for Disability Research and Policy at the University of Sydney and the Young People in Nursing Homes National Alliance were partners in a project, supported by the NDIACentre for Disability Research and Polic
Experimental Investigation of Changing Fuel Path Dynamics in Twin-Independent Variable Camshaft Timing Engines
The effect of a variable camshaft timing (VCT) disturbance on air-to-fuel ratio (AFR) signal is investigated for a twin-independent (TI) VCT engine. Different types of VCT disturbances on AFR signal are investigated. Gaseous fuel experiments are performed in addition to conventional petrol fuel experiments to show that not all the transient VCT disturbances acting on AFR are due to changes in air path dynamics. Experiments show that varying exhaust valve closing (EVC) timing has a significant effect on the air path dynamics and is an important cause of transient AFR deviations. However varying EVC does not affect the fuel puddle significantly. On the other hand varying inlet valve opening (IVO) timing has a strong effect on the fuel puddle size and is also an important cause of transient AFR deviations. Thus for superior transient AFR control in TI-VCT engines, it is essential to model not only the effects of valve timings on air path dynamics but also on the fuel path dynamics
Dementia services for people from Black, Asian and Minority Ethnic and White-British communities: Does a primary care based model contribute to equality in service provision?
This study set out to investigate whether there were disparities in service provision for people from Black, Asian and Minority Ethnic (BAME) communities compared to White British (WB) communities within a primary care led dementia service in the UK. Data were extracted from 30 cases from three BAME (African-Caribbean, South Asian and Chinese) communities who had been referred to a dementia service between April 2016 and December 2017. We then extracted data from 30 WB cases matched for gender, age (within 5years) and General Practitioner surgery. We compared service provision for both samples around assessment, diagnosis and post-diagnostic support. The primary source of information in the BAME sample was less likely to be recorded as being the main carer and more likely to be an adult child. Cases from both samples were equally likely to have a CT scan. People from BAME communities were less likely to receive a cognitive assessment, and when they did they scored at a lower level. There was no difference between samples for the diagnoses that cases received, but BAME cases were more likely to be assessed as being low rather than medium or high risk. While cases from both samples were equally likely to receive medication, BAME cases were more likely to be seen by a psychiatrist. Significantly more people from the WB sample were recorded as using or being offered more than one form of community support. This study of a primary care-based dementia service suggests that while many areas of service provision showed no evidence of inequality, important differences remain including the time at which people present for assessment and the range of post-diagnostic services which are discussed. Further research is required to establish the likely causes of these disparities
More Than a Moggy; A Population Genetics Analysis of the United Kingdom’s Non-Pedigree Cats
The domestic cat is one of the most popular pets in the world. It is estimated that 89–92% of domestic cats in the UK are non-pedigree Domestic shorthair (DSH), Domestic longhair (DLH), or Domestic semi-longhair cats (DSLH). Despite their popularity, little is known of the UK non-pedigree cats’ population structure and breeding dynamics. Using a custom designed single nucleotide variant (SNV) array, this study investigated the population genetics of 1344 UK cats. Principal components analysis (PCA) and fastSTRUCTURE analysis verified that the UK’s DSH, DLH, and DSLH cats are random-bred, rather than admixed, mix breed, or crossbred. In contrast to pedigree cats, the linkage disequilibrium of these random-bred cats was least extensive and decayed rapidly. Homozygosity by descent (HBD) analysis showed the majority of non-pedigree cats had proportionally less of their genome in HBD segments compared to pedigree cats, and that these segments were older. Together, these findings suggest that the DSH, DLH, and DSLH cats should be considered as a population of random-bred cats rather than a crossbred or pedigree-admixed cat. Unexpectedly, 19% of random-bred cat genomes displayed a higher proportion of HBD segments associated with more recent inbreeding events. Therefore, while non-pedigree cats as a whole are genetically diverse, they are not impervious to inbreeding and its health risks
On the static and dynamic properties of flax and Cordenka epoxy composites
Fibre reinforced composites have excellent specific properties and are widely sought after by engineers seeking to reduce mass. However, end of life disposal is a significant problem and so research into more sustainable natural fibre composites is extremely topical. This paper examines the applicability of natural fibre composites for high performance structural applications. Woven flax and regenerated cellulose (Cordenka) textiles were pre-impregnated with commercially available epoxy resins and consolidated into test laminates in an autoclave to determine their static (compressive, tensile, flexural) and dynamic (energy absorption) properties.
The range of compressive strengths was 77.5–299.6 MPa. Tensile strengths ranged from 63 to 92.6 MPa and interlaminar shear strength (ILSS) from 10.7 to 23.3 MPa. Specific energy absorption (SEA) varied between 21.2–34.2 kJ/kg. Biotex flax combined with MTM49 resin matched the SEA of T300 carbon fibre using the same resin system and layup. This work has demonstrated that natural fibre composites have significant scope for use in structural applications but additional work is required on fibre to matrix bonding in order to maximise their properties whilst remaining an environmentally credible option
Generalized form of the magnetic anisotropy field in micromagnetic and atomistic spin models
We present a general approach to the derivation of the effective anisotropy field which determines the dynamical behavior of magnetic spins according to the Landau-Lifshitz-Gilbert equation. The approach is based on the gradient in spherical polar coordinates with the final results being expressed in Cartesian coordinates as usually applied in atomistic and micromagnetic model calculations. The approach is generally valid for all orders of anisotropies including higher-order combinations of azimuthal and rotational anisotropies often found in functional magnetic materials such as permanent magnets and an emerging class of antiferromagnetic materials with applications in spintronics. Anisotropies are represented in terms of spherical harmonics which have the important property of rational temperature scaling. Effective field vectors are given for anisotropies up to sixth order, presenting a unified framework for implementing higher-order magnetic anisotropies in numerical simulations
Comparison of the performance of photonic band-edge liquid crystal lasers using different dyes as the gain medium
The primary concern of this work is to study the emission characteristics of a series of chiral nematic liquid crystal lasers doped with different laser dyes (DCM, pyrromethene 580, and pyrromethene 597) at varying concentrations by weight (0.5-2 wt %) when optically pumped at 532 nm. Long-wavelength photonic band-edge laser emission is characterized in terms of threshold energy and slope efficiency. At every dye concentration investigated, the pyrromethene 597-doped lasers exhibit the highest slope efficiency (ranging from 15% to 32%) and the DCM-doped lasers the lowest (ranging from 5% to 13%). Similarly, the threshold was found to be, in general, higher for the DCM-doped laser samples in comparison to the pyrromethene-doped laser samples. These results are then compared with the spectral properties, quantum efficiencies and, where possible, fluorescence lifetimes of the dyes dispersed in a common nematic host. In accordance with the low thresholds and high slope efficiencies, the results show that the molar extinction coefficients and quantum efficiencies are considerably larger for the pyrromethene dyes in comparison to DCM, when dispersed in the liquid crystal host.open191
Synthesis, photophysics and molecular structures of luminescent 2,5-bis(phenylethynyl)thiophenes (BPETs)
International audienceThe Sonogashira cross-coupling of two equivalents of para-substituted ethynylbenzenes with 2,5-diiodothiophene provides a simple synthetic route for the preparation of 2,5-bis(para-R-phenylethynyl)thiophenes (R = H, Me, OMe, CF3, NMe2, NO2, CN and CO2Me) (1a-h). Likewise, 2,5-bis(pentafluorophenylethynyl)thiophene (2) was prepared by the coupling of 2,5-diiodothiophene with pentafluorophenylacetylene. All compounds were characterised by NMR, IR, Raman and mass spectroscopy, elemental analysis, and their absorption and emission spectra, quantum yields and lifetimes were also measured. The spectroscopic studies of 1a-h and 2 show that both electron donating and electron withdrawing para-subsituents on the phenyl rings shift the absorption and emission maxima to lower energies, but that acceptors are more efficient in this regard. The short singlet lifetimes and modest fluorescence quantum yields (ca. 0.2-0.3) observed are characteristic of rapid intersystem crossing. The single-crystal structures of 2,5-bis(phenylethynyl)thiophene, 2,5-bis(para-carbomethoxyphenylethynyl)thiophene, 2,5-bis(para-methylphenylethynyl)thiophene and 2,5-bis(pentafluorophenylethynyl)thiophene were determined by X-ray diffraction at 120 K. DFT calculations show that the all-planar form of the compounds is the lowest in energy, although rotation of the phenyl groups about the C[triple bond, length as m-dash]C bond is facile and TD-DFT calculations suggest that, similar to 1,4-bis(phenylethynyl)benzene analogues, the absorption spectra in solution arise from a variety of rotational conformations. Frequency calculations confirm the assignments of the compounds' IR and Raman spectra
- …