3,675 research outputs found

    Diversity in Advertisements and Brand Perception

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    This research project examines the relationship between representation of diversity in marketing and brand perception. The debate about whether diversity in advertisements impacts how consumers perceive and purchase from brands is ongoing. Thus, this study examines whether companies are rewarded for representing diversity in their advertisements and punished for representation that is inappropriate or insensitive. We conducted an online survey among Gettysburg College students and elicited their beliefs about the importance of diversity in marketing campaigns. We found that consumers are more likely to buy from companies that represent more racial diversity in their advertisements. The same was found for companies that represent more diversity of body types in their advertisements. The appropriateness of advertisements was also found to have an impact on the likelihood of consumers to purchase from companies, with consumers being less likely to buy from companies that have racially inappropriate or insensitive advertisements

    Envisioning health equity for American Indian/Alaska Natives: a unique HIT opportunity

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    The Indian Health Service provides care to remote and under-resourced communities in the United States. American Indian/Alaska Native patients have some of the highest morbidity and mortality among any ethnic group in the United States. Starting in the 1980s, the IHS implemented the Resource and Patient Management System health information technology (HIT) platform to improve efficiency and quality to address these disparities. The IHS is currently assessing the Resource and Patient Management System to ensure that changing health information needs are met. HIT assessments have traditionally focused on cost, reimbursement opportunities, infrastructure, required or desired functionality, and the ability to meet provider needs. Little information exists on frameworks that assess HIT legacy systems to determine solutions for an integrated rural healthcare system whose end goal is health equity. This search for a next-generation HIT solution for a historically underserved population presents a unique opportunity to envision and redefine HIT that supports health equity as its core mission

    Socio-cultural influences upon knowledge of sexually transmitted infections: a qualitative study with heterosexual middle-aged adults in Scotland

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    There has been a recent global increase in sexually transmitted infections (STIs) including HIV among adults aged over 45. Limited evidence exists regarding middle-aged adults‚Äô knowledge of STIs other than HIV. This qualitative study sought to understand middle-aged adults‚Äô knowledge of STIs within a socio-cultural context. Individual interviews, based on a life-course approach, were conducted with 31 recently sexually active heterosexual men and women. Participants were aged between 45 and 65 and of mixed relationship status (14 were single, 17 in a relationship). Thematic analysis identified four key findings, including: ‚Äúengagement with STI-related knowledge‚ÄĚ; ‚Äúgeneral knowledge of STIs‚ÄĚ; ‚Äúlearning about STIs from children‚ÄĚ; and ‚Äúlimited application of knowledge‚ÄĚ. The findings allow insight into a neglected area, and indicate that socio-cultural factors influence middle-aged adults‚Äô STI-related knowledge acquisition throughout the life course. These are important implications for the prevention of STIs, particularly in addressing the on-going stigmatisation of STIs in older age groups

    Local Density Approximation for proton-neutron pairing correlations. I. Formalism

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    In the present study we generalize the self-consistent Hartree-Fock-Bogoliubov (HFB) theory formulated in the coordinate space to the case which incorporates an arbitrary mixing between protons and neutrons in the particle-hole (p-h) and particle-particle (p-p or pairing) channels. We define the HFB density matrices, discuss their spin-isospin structure, and construct the most general energy density functional that is quadratic in local densities. The consequences of the local gauge invariance are discussed and the particular case of the Skyrme energy density functional is studied. By varying the total energy with respect to the density matrices the self-consistent one-body HFB Hamiltonian is obtained and the structure of the resulting mean fields is shown. The consequences of the time-reversal symmetry, charge invariance, and proton-neutron symmetry are summarized. The complete list of expressions required to calculate total energy is presented.Comment: 22 RevTeX page

    Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V901 Orionis

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    CU Vir and V901 Ori belong among these few magnetic chemically peculiar stars whose rotation periods vary on timescales of decades. We aim to study the stability of the periods in CU Vir and V901 Ori using all accessible observational data containing phase information. We collected all available relevant archived observations supplemented with our new measurements of these stars and analysed the period variations of the stars using a novel method that allows for the combination of data of diverse sorts. We found that the shapes of their phase curves were constant, while the periods were changing. Both stars exhibit alternating intervals of rotational braking and acceleration. The rotation period of CU Vir was gradually shortening until the year 1968, when it reached its local minimum of 0.52067198 d. The period then started increasing, reaching its local maximum of 0.5207163 d in the year 2005. Since that time the rotation has begun to accelerate again. We also found much smaller period changes in CU Vir on a timescale of several years. The rotation period of V901 Ori was increasing for the past quarter-century, reaching a maximum of 1.538771 d in the year 2003, when the rotation period began to decrease. A theoretically unexpected alternating variability of rotation periods in these stars would remove the spin-down time paradox and brings a new insight into structure and evolution of magnetic upper-main-sequence stars.Comment: 5 pages, 3 figure

    Hybrid Stars in a Strong Magnetic Field

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    We study the effects of high magnetic fields on the particle population and equation of state of hybrid stars using an extended hadronic and quark SU(3) non-linear realization of the sigma model. In this model the degrees of freedom change naturally from hadrons to quarks as the density and/or temperature increases. The effects of high magnetic fields and anomalous magnetic moment are visible in the macroscopic properties of the star, such as mass, adiabatic index, moment of inertia, and cooling curves. Moreover, at the same time that the magnetic fields become high enough to modify those properties, they make the star anisotropic.Comment: Revised version with updated reference

    Is salinity the main ecologic factor that shapes the distribution of two endemic Mediterranean plant species of the genus Gypsophila?

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    The final publication is available at Springer via http://dx.doi.org/10.1007/s11104-014-2218-2Aims Responses to salt stress of two Gypsophila species that share territory, but with different ecological optima and distribution ranges, were analysed. G. struthium is a regionally dominant Iberian endemic gypsophyte, whereas G. tomentosa is a narrow endemic reported as halophyte. Theworking hypothesis is that salt tolerance shapes the presence of these species in their specific habitats. Methods Taking a multidisciplinary approach, we assessed the soil characteristics and vegetation structure at the sampling site, seed germination and seedling development, growth and flowering, synthesis of proline and cation accumulation under artificial conditions of increasing salt stress and effect of PEG on germination and seedling development. Results Soil salinity was low at the all sampling points where the two species grow, but moisture was higher in the area of G. tomentosa. Differences were found in the species salt and drought tolerance. The different parameters tested did not show a clear pattern indicating the main role of salt tolerance in plant distribution. Conclusions G. tomentosa cannot be considered a true halophyte as previously reported because it is unable to complete its life cycle under salinity. The presence of G. tomentosa in habitats bordering salt marshes is a strategy to avoid plant competition and extreme water stressSoriano, P.; Moruno Manch√≥n, JF.; Boscaiu Neagu, MT.; Vicente Meana, √ď.; Hurtado, A.; Llinares Palacios, JV.; Estrelles, E. (2014). Is salinity the main ecologic factor that shapes the distribution of two endemic Mediterranean plant species of the genus Gypsophila?. Plant and Soil. 384(1-2):363-379. doi:10.1007/s11104-014-2218-2S3633793841-2Alonso MA (1996) Flora y vegetaci√≥n del Valle de Villena (Alicante). Instituto de Cultura Juan Gil-Albert, AlicanteAlvarado JJ, Ruiz JM, L√≥pez-Cantarero I, Molero J, Romero L (2000) Nitrogen metabolism in five plant species characteristic of gypsiferous soils. Plant Physiol 156:612‚Äď616Ashraf M, Foolad MR (2007) Roles of glycine betaine and proline in improving plant abiotic stress resistance. Environ Exp Bot 59:206‚Äď216Ashraf MY (2009) Salt tolerance mechanisms in some halophytes from Saudi Arabia and Egypt. Res J Agric Biol Sci 5:191‚Äď206Bates LS, Waldren RP, Tear LD (1973) Rapid determination of free proline for water-stress studies. Plant Soil 39:205‚Äď207Ben-Gal A, Neori-Borochov H, Yermiyahu U, Shani U (2009) Is osmotic potential a more appropriate property than electrical conductivity for evaluating whole plant response to salinity? Environ Exp Bot 65:232‚Äď237Biondi E (2011) Phytosociology today: Methodological and conceptual evolution. Plant Biosyst 145:19‚Äď29Boscaiu M, Bautista I, Lid√≥n A, Llinares J, Lull C, Donat P, Mayoral O, Vicente O (2013a) Environmental-dependent proline accumulation in plants living on gypsum soils. Acta Physiol Plant 35:2193‚Äď2204Boscaiu M, Llul C, Llinares J, Vicente O, Boira H (2013b) Proline as a biochemical marker in relation to the ecology of two halophytic Juncus species. J Plant Ecol 6:177‚Äď186Bradford KJ (1990) A water relations analysis of seed germination rates. Plant Physiol 94:840‚Äď849Breckle SW (1999) Halophytic and gypsophytic vegetation of the Ebro-Basin at Los Monegros. In: Melic A, Blasco-Zumeta J (eds) Manifiesto cient√≠fico por Los Monegros, vol 24, Bol. SEA., pp 101‚Äď104Brenchley JL, Probert RJ (1998) Seed germination responses to some environmental factors in the sea grass Zoostera capricorni from eastern Australia. Aquat Bot 62:177‚Äď188Ca√Īadas EM, Ballesteros M, Valle F, Lorite J (2013) Does gypsum influence seed germination? 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J Appl Math Decis Sci 7:187‚Äď206Lid√≥n A, Boscaiu M, Collado F, Vicente O (2009) Soil requirements of three salt tolerant, endemic species from south-east Spain. Not Bot Horti Agrobo 37:64‚Äď70L√≥pez Gonz√°lez G (1990) Gypsohila L. In: Castroviejo S, La√≠nz M, L√≥pez G et al (eds) Flora Ib√©rica 2. Real Jard√≠n Bot√°nico, Madrid, pp 408‚Äď415Lutts S, Kinet JM, Bouharmont J (1996) Effects of salt stress on growth, mineral nutrition and proline accumulation in relation to osmotic adjustment in rice (Oryza sativa L.) cultivars differing in salinity resistance. Plant Growth Regul 19:207‚Äď218Madidi S, Baroudi B, Ameur FB (2004) Effects of salinity on germination and early growth of barley (Hordeum vulgare L.) cultivars. Int J Agric Biol 6:767‚Äď770Marchal FM, Lend√≠nez ML, Salazar C, Torres JA (2008) Aportaciones al conocimiento de la vegetaci√≥n gisps√≠cola en el occidente de la provincia de Granada (sur de Espa√Īa). 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US Department of Agriculture Handbook no. 60, 160 ppVicente O, Boscaiu M, Naranjo M, Estrelles E, Bell√©s JM, Soriano P (2004) Responses to salt stress in the halophyte Plantago crassifolia (Plantaginaceae). J Arid Environ 58:463‚Äď48

    Effects of Salt Stress on Three Ecologically Distinct Plantago Species

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    Comparative studies on the responses to salt stress of taxonomically related taxa should help to elucidate relevant mechanisms of stress tolerance in plants. We have applied this strategy to three Plantago species adapted to different natural habitats, P. crassifolia and P. coronopus both halophytes and P. major, considered as salt-sensitive since it is never found in natural saline habitats. Growth inhibition measurements in controlled salt treatments indicated, however, that P. major is quite resistant to salt stress, although less than its halophytic congeners. The contents of monovalent ions and specific osmolytes were determined in plant leaves after four-week salt treatments. Salt-treated plants of the three taxa accumulated Na+ and Cl- in response to increasing external NaCl concentrations, to a lesser extent in P. major than in the halophytes; the latter species also showed higher ion contents in the non-stressed plants. In the halophytes, K+ concentration decreased at moderate salinity levels, to increase again under high salt conditions, whereas in P. major K+ contents were reduced only above 400 mM NaCl. Sorbitol contents augmented in all plants, roughly in parallel with increasing salinity, but the relative increments and the absolute values reached did not differ much in the three taxa. On the contrary, a strong (relative) accumulation of proline in response to high salt concentrations (600 800 mM NaCl) was observed in the halophytes, but not in P. major. These results indicate that the responses to salt stress triggered specifically in the halophytes, and therefore the most relevant for tolerance in the genus Plantago are: a higher efficiency in the transport of toxic ions to the leaves, the capacity to use inorganic ions as osmotica, even under low salinity conditions, and the activation, in response to very high salt concentrations, of proline accumulation and K+ transport to the leaves of the plants.MAH was a recipient of an Erasmus Mundus pre-doctoral scholarship financed by the European Commission (Welcome Consortium). AP acknowledges the Erasmus mobility programme for funding her stay in Valencia to carry out her Master Thesis.Al Hassan, M.; Pacurar, AM.; L√≥pez Gresa, MP.; Donat Torres, MDP.; Llinares Palacios, JV.; Boscaiu Neagu, MT.; Vicente Meana, √ď. (2016). Effects of Salt Stress on Three Ecologically Distinct Plantago Species. PLoS ONE. 11(8):1-21. doi:10.1371/journal.pone.0160236S12111

    Physics of Neutron Star Crusts

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    The physics of neutron star crusts is vast, involving many different research fields, from nuclear and condensed matter physics to general relativity. This review summarizes the progress, which has been achieved over the last few years, in modeling neutron star crusts, both at the microscopic and macroscopic levels. The confrontation of these theoretical models with observations is also briefly discussed.Comment: 182 pages, published version available at <http://www.livingreviews.org/lrr-2008-10
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