3,875 research outputs found
Multi-Array 5G V2V Relative Positioning: Performance Bounds
We study the performance bounds of vehicle-to-vehicle (V2V) relative
positioning for vehicles with multiple antenna arrays. The Cram\'{e}r-Rao bound
for the estimation of the relative position and the orientation of the Tx
vehicle is derived, when angle of arrival (AOA) measurements with or without
time-difference of arrival (TDOA) measurements are used. In addition,
geometrically intuitive expressions for the corresponding Fisher information
are provided. The derived bounds are numerically evaluated for different
carrier frequencies, bandwidths and array configurations under different V2V
scenarios, i.e. overtaking and platooning. The significance of the AOA and TDOA
measurements for position estimation is investigated. The achievable
positioning accuracy is then compared with the present requirements of the 3rd
Generation Partnership Project (3GPP) 5G New Radio (NR) vehicle-to-everything
(V2X) standardization
The impact of cultural dissonance and acculturation orientations on immigrant students' academic performance
Indexación: Scopus; Scielo; Redalyc.Prior research has documented meaningful differences between school
performance of immigrant and native students. Multicultural education has been
associated with academic failure of foreign students. e aim of this study was to examine
the impact of a set of psychosocial variables on the perceived academic achievement
of first generation immigrant adolescents from public secondary schools in Northern
Spain. Results showed that 46% of the variability in foreign students’ perceived academic
performance was explained by home-school cultural dissonance. We also explored the
impact of acculturation orientation to separation, perception of discrimination from
teachers, school adjustment, and psychological well-being in academic performance.
Any multicultural education context should take into account psychosocial adjustment,
given its influence on academic performance of all studentsSe han hallado diferencias significativas entre el rendimiento académico de
los inmigrantes y el de los estudiantes nativos. Sin embargo, hay una escasa evidencia
acerca de los aspectos psicosociales de este fenómeno. El objetivo de este estudio fue
examinar el impacto de un conjunto de variables psicosociales: disonancia cultural y
orientaciones de aculturación en el rendimiento académico percibido de adolescentes
inmigrantes de primera generación de centros de Educación Secundaria en el Norte
de España. Los resultados mostraron que alrededor del 46% de la variabilidad en el
rendimiento era explicada por la disonancia cultural entre escuela y hogar. Cualquier
contexto de educación multicultural ha de tomar en consideración el ajuste psicosocial,
dada su influencia en el rendimiento académico de los estudiantes.http://www.redalyc.org/jatsRepo/647/64753989003/index.htm
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