8,579 research outputs found
Cultural influences on normative reactions to incivility: comparing individuals from South Korea and Spain
Purpose: Antecedents and influences of workplace incivility have recently been studied in many areas of research but there is still lack of consideration for the impact of culture. Theoretical considerations for the present research are based on the cultural dimensions of power distance and tightness/looseness because the collective levels of power distance are similar between Korea and Spain, but the collective levels of tightness/looseness are different between the two countries. The present research examined whether individuals’ occupational position affects their normative reactions to incivility differently. Design/methodology/approach: Participant (victim)’s (those who react to uncivil behaviors) social power (low vs. high) and perpetrator’s (those who exhibit uncivil behaviors) social power (low vs. high) were experimentally manipulated; all participants were randomly assigned to one of four perpetrator x victim conditions in relation to hierarchical positions (Ntot = 467). Findings: The results suggest that the level of social and personal acceptability was greater either among Koreans than Spanish at a collective level or among people who endorsed higher power distance and tightness values. All in all, the findings highlight cultural influences on the importance of social hierarchy as a factor that can impact the people’s normative reactions to incivility. Originality/value: The findings broaden our understanding of psychology of employees in relation to incivility, by simultaneously considering the influences of culture (power distance and tightness/looseness) and social power
Determinación de las condiciones óptimas para la obtención de un fertilizante fosfatado a partir de la roca fosfórica cubana
(Eng) In order to reach food security in the country, it is necessary to intensify the production of fertilizers in a sustainable manner in order to obtain increases in productivity, generate economic profits, and increase the use of national raw materials to reduce imports. For these reasons it is necessary to determine the optimum conditions for the process of obtaining Single Superphosphate (SFS), from the phosphate rock and sulfuric acid at lab scale, and thus determine the values of the variables which intervene in that process and assure the maximum quality of the product. To carry out the research, the rotational centered factorial design 22 with star points was used in 13 experimental runs and an experiment matrix was elaborated with the independent variables, acid / rock ratio and percentage of sulfuric acid, in the range of 1.61-2.06 and 65% -75% respectively. As a result it was obtained that the optimum parameters in the range studied for the benefited Cuban rock are: H2SO4 concentration of 72% and acid / rock ratio of 2.02. The quality indexes of the Superphosphate Simple cured obtained with the optimum parameters are: assimilable phosphorus content of 12.28%, humidity 8.21% and free acidity 2.05%; acting in accordance with international product specifications.(Spa) Con la finalidad de lograr la seguridad alimentaria en el país, es necesario intensificar de manera sostenible la producción de fertilizantes para obtener incrementos de productividad y generar ganancias económicas, potenciando el uso de materias primas nacionales para disminuir las importaciones. Es por ello que, en este trabajo se realizó el estudio de la determinación de las condiciones óptimas del proceso de obtención de Superfosfato Sencillo (SFS) a escala de laboratorio, a partir de la roca fosfórica y el ácido sulfúrico y con ello determinar los valores de las variables que intervienen en el mismo, y que aseguren la máxima calidad del producto. Para la realización de la investigación se utilizó el diseño factorial centrado rotacional 22 con puntos estrellas en 13 corridas experimentales y se elaboró una matriz de experimentos con las variables independientes, relación ácido/roca y porcentaje de ácido sulfúrico, en el intervalo de 1.61-2.06 y 65%-75% respectivamente. Como resultado se obtuvo que los parámetros óptimos en el intervalo estudiado para la roca cubana beneficiada fueron: concentración de H2SO4 de 72% y la relación ácido/roca de 2.02. Los índices de calidad del Superfosfato Sencillo curado obtenido con los parámetros óptimos son: contenido de fósforo asimilable de 12.28%, humedad 8.21% y acidez libre 2.05%; cumpliendo de forma general con especificaciones internacionales del producto
Psychological elements explaining the consumer's adoption and use of a website recommendation system: A theoretical framework proposal
The purpose of this paper is to understand, with an emphasis on the psychological perspective of the research problem, the consumer's adoption and use of a certain web site recommendation system as well as the main psychological outcomes involved. The approach takes the form of theoretical modelling. Findings: A conceptual model is proposed and discussed. A total of 20 research propositions are theoretically analyzed and justified. Research limitations/implications: The theoretical discussion developed here is not empirically validated. This represents an opportunity for future research. Practical implications: The ideas extracted from the discussion of the conceptual model should be a help for recommendation systems designers and web site managers, so that they may be more aware, when working with such systems, of the psychological process consumers undergo when interacting with them. In this regard, numerous practical reflections and suggestions are presented
Chiral transition-metal complexes as Brønsted-acid catalysts for the asymmetric Friedel-Crafts hydroxyalkylation of indoles.
The Friedel-Crafts reaction between 3,3,3-trifluoropyruvates and indoles is efficiently catalysed by the iridium complex [(η5-C 5Me5)Ir{(R)-Prophos}(H2O)][SbF 6]2 (1) with up to 84% ee. Experimental data and theoretical calculations support a mechanism involving the Brønsted-acid activation of the pyruvate carbonyl by the protons of the coordinated water molecule in 1. Water is not dissociated during the process and, therefore, the catalytic reaction occurs with no direct interaction between the substrates and the metal. This journal is © the Partner Organisations 2014.The authors acknowledge the Ministerio de Economía y Competitividad (MINECO, Grants CTQ2006-03030/BQU, CTQ2009-10303/BQU, CTQ2011-27033 and Consolider Ingenio 2010 CSD2006-003), Gobierno de Aragón (Grupo Consolidado: Catálisis Homogénea Enantioselectiva), Generalitat de Catalunya (2009SGR0259) and the ICIQ foundation for financial support. A. S. and R. R. acknowledge MINECO for predoctoral fellowships. S. D.-G. acknowledges MINECO for a “Torres Quevedo” contract.Peer Reviewe
Electrical transport properties of manganite powders under pressure
We have measured the electrical resistance of micrometric to nanometric
powders of the LaPrCaMnO (LPCMO with y=0.3) manganite
for hydrostatic pressures up to 4 kbar. By applying different final thermal
treatments to samples synthesized by a microwave assisted denitration process,
we obtained two particular grain characteristic dimensions (40 nm and 1000 nm)
which allowed us to analyze the grain size sensitivity of the electrical
conduction properties of both the metal electrode interface with manganite (Pt
/ LPCMO) as well as the intrinsic intergranular interfaces formed by the LPCMO
powder, conglomerate under the only effect of external pressure. We also
analyzed the effects of pressure on the phase diagram of these powders. Our
results indicate that different magnetic phases coexist at low temperatures and
that the electrical transport properties are related to the intrinsic
interfaces, as we observe evidences of a granular behavior and an electronic
transport dominated by the Space Charge limited Current mechanism.Comment: 4 pages, 7 figures, to be published in Physica B Corresponding
author: C. Acha ([email protected]
Acrometástasis por cáncer de pulmón, diagnóstico simultáneo: a propósito de un caso
Las acrometástasis son hallazgos patológicos malignos muy poco frecuentes. La importancia de
estas lesiones reside en que en ocasiones puede ser la primera manifestación de una neoplasia oculta y avanzada
y que además por sus características puede confundirse con otras patologías esqueléticas y tratarse de manera
inadecuada.
Presentamos
el
caso
de
una
acrometástasis
localizada
en
la
falange
distal
del
dedo
de
una
mano
en
un paciente que previamente no había sido diagnosticado de cáncer de pulmón.Acrometastasis
are
rare
malignant
pathological
findings.
They
can
sometimes
be
the
first
mani
-
festation
of
an
occult
and
advanced
neoplasia
and
also
they
can
be
confused
with
other
skeletal
pathologies
and
treated
inappropriately.
We
report
a
case
of
acrometastasis
to
the
distal
phalanx
of
the
finger
of
the
hand
in
a
patient
who
previously
hadn't
been
diagnosed
with
lung
cancer
Interpolation centers' selection using hierarchical curvature-based clustering
It is widely known that some fields related to graphic applications require realistic and full detailed three-dimensional models. Technologies for this kind of applications exist. However, in some cases, laser scanner get complex models composed of million of points, making its computationally difficult. In these cases, it is desirable to obtain a reduced set of these samples to reconstruct the function's surface. An appropriate reduction approach with a non-significant loss of accuracy in the reconstructed function with a good balance of computational load is usually a non-trivial problem. In this article, a hierarchical clustering based method by the selection of center using the geometric distribution and curvature estimation of the samples in the 3D space is described
Las Areas Marinas Protegidas (AMPs) como Herramienta de Manejo de las Pesquerías Demersales en la Zona Norte del Caribe Colombiano
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