7,133 research outputs found
Transform-based Distributed Data Gathering
A general class of unidirectional transforms is presented that can be
computed in a distributed manner along an arbitrary routing tree. Additionally,
we provide a set of conditions under which these transforms are invertible.
These transforms can be computed as data is routed towards the collection (or
sink) node in the tree and exploit data correlation between nodes in the tree.
Moreover, when used in wireless sensor networks, these transforms can also
leverage data received at nodes via broadcast wireless communications. Various
constructions of unidirectional transforms are also provided for use in data
gathering in wireless sensor networks. New wavelet transforms are also proposed
which provide significant improvements over existing unidirectional transforms
A Probabilistic Interpretation of Sampling Theory of Graph Signals
We give a probabilistic interpretation of sampling theory of graph signals.
To do this, we first define a generative model for the data using a pairwise
Gaussian random field (GRF) which depends on the graph. We show that, under
certain conditions, reconstructing a graph signal from a subset of its samples
by least squares is equivalent to performing MAP inference on an approximation
of this GRF which has a low rank covariance matrix. We then show that a
sampling set of given size with the largest associated cut-off frequency, which
is optimal from a sampling theoretic point of view, minimizes the worst case
predictive covariance of the MAP estimate on the GRF. This interpretation also
gives an intuitive explanation for the superior performance of the sampling
theoretic approach to active semi-supervised classification.Comment: 5 pages, 2 figures, To appear in International Conference on
Acoustics, Speech, and Signal Processing (ICASSP) 201
Graph Variogram: A novel tool to measure spatial stationarity
Irregularly sampling a spatially stationary random field does not yield a
graph stationary signal in general. Based on this observation, we build a
definition of graph stationarity based on intrinsic stationarity, a less
restrictive definition of classical stationarity. We introduce the concept of
graph variogram, a novel tool for measuring spatial intrinsic stationarity at
local and global scales for irregularly sampled signals by selecting subgraphs
of local neighborhoods. Graph variograms are extensions of variograms used for
signals defined on continuous Euclidean space. Our experiments with
intrinsically stationary signals sampled on a graph, demonstrate that graph
variograms yield estimates with small bias of true theoretical models, while
being robust to sampling variation of the space.Comment: Submitted to IEEE Global Conference on Signal and Information
Processing 2018 (IEEE GlobalSIP 2018), Nov 2018, Anaheim, CA, United States.
(https://2018.ieeeglobalsip.org/
Relational conflict is not too bad for employees when they have developed their emotional intelligence skills
Team conflict constitutes one of the most prevalent team processes in the workplace (BenÃtez et al., 2011; De Dreu, 2010), especially in competitive organizational contexts, such as, university organizations (Matthiesen & Einarsen, 2007). De Wit, Greer, & Jehn (2012) 's methanalysis showed that, team conflict is not always negative for employees well-being. Its effects are depending on the conflict type and conflict contexts. In this sense, research has shown that, task conflict could be positive for job satisfaction and, relationship conflict consequences of well-being could be buffer when team members have good skills to solve conflicts (De Dreu et al., 2004; Seong & Choi, 2014). Emotional intelligence has come to be seen as a key concept for the development of organizations. Especially in professions that require continuous management of interpersonal relationships, such as, teachers (Extremera & Fernández-Berrocal, 2004, Jiménez & López-Zafra, 2007). When individuals are in a conflict situation, whatever the type, they face the same ones influenced by their emotional state (Barry & Fulmer, 2004; Montes 2014). Therefore, employees with high emotional intelligence may be better able to cope with conflict-induced stress than people who do not have such a skill (Armstrong et al., 2011). However, despite the existence of empirical evidence on the influence of emotional intelligence on the adequate management of conflict, there are few studies that have analyzed the moderating role of emotional intelligence in the relationship between both types of conflict (task and relationship conflict) and burnout. This study extends the conflict literature by examining the moderating role of emotional intelligent on the relationship between two conflict types (task conflict and relationship conflict) and burnout core (emotional exhaustion and depersonalization)
Space, mass and ornament in the Gothic-Renaissance transition in Spain
La introducción en España de
las nuevas formas y sintaxis
renacentistas a lo largo del
siglo xvi no se produjo con un
abandono radical e inmediato de
los viejos usos góticos, de validez
comprobada en trascendentales
cuestiones del diseño
arquitectónico. La renovación de
la producción fue heterogénea y
en cierto modo particular de cada
artÃfice, según su formación previa
y el grado de contacto, coherencia
y compromiso con las novedades
italianas, generando un panorama
hÃbrido y plural en la arquitectura
del quinientos hispano.
Atendiendo a significativos textos
y documentos gráficos de la
época, se pretende rastrear los
cambios, e inercias, en el proceso
de diseño arquitectónico durante
esta larga etapa de transición,
estructurando el análisis a partir
de tres categorÃas sustanciales,
interdependientes y autónomas a la
vez: espacio, masa y ornato.During the sixteenth century the
new Renaissance forms were
introduced in Spain, but the
Gothic procedures continued
to be used due to their proven
validity for the architectural
design. The renovation of the
architecture was heterogeneous
and different for each master, according to his previous
training and his knowledge of the
new Italian forms. This involved
a hybrid and plural context in
the Spanish architecture of the
16th century.
The changes and continuities of
the architectural design process
during this transitory stage are
investigated in this paper, based
on significant texts and graphic
documents of this period. The
analysis is structured based on
three substantial architectural
categories, which are
simultaneously interdependent
and autonomous: space, mass
and ornamen
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