8,458 research outputs found
Absorptive capacity and smart companies
Purpose: The current competitive environment is substantially modifying the organizations’ learning processes due to a global increase of available information allowing this to be transformed into knowledge. This opportunity has been exploited since the nineties by the tools of “Business Analytics” and “Business Intelligence” but, nevertheless, being integrated in the study of new organizational capacities engaged in the process of creating intelligence inside organizations is still an outstanding task. The review of the concept of absorptive capacity and a detailed study from the perspective of this new reality will be the main objective of study of this paper. Design/methodology/approach: By comparing classical absorptive capacity and absorptive capacity from the point of view of information management tools in each one of the three stages of the organizational learning cycle, some gaps of the former are overcome/fulfilled. The academic/bibliographical references provided in this paper have been obtained from ISI web of knowledge, Scopus and Dialnet data bases, supporting the state of affairs on absorptive capacity and thereafter filtering by "Business Intelligence" and "Business Analytics". Specialized websites and Business Schools` Publications there have also been included, crowning the content on information management tools used that are currently used in the strategic consulting. Findings: Our contribution to the literature is the development of "smart absorptive capacity". This is a new capacity emerging from the reformulation of the classical concept of absorptive capacity wherein some aspects of its definition that might have been omitted are emphasized. The result of this new approach is the creation of a new Theoretical Model of Organizational Intelligence, which aims to explain, within the framework of the Resources and Capabilities Theory, the competitive advantage achieved by the so-called smart companies. Originality/value: This paper presents a novel integration of various concepts: the concept of absorptive capacity from academic research and strategic consulting associated with the tools of information management. This allows us to develop better management practices by obtaining profit from these investments and facilitating the creation of intelligence inside organizationsPeer Reviewe
Neutrinos and the matter-antimatter asymmetry in the Universe
The discovery of neutrino oscillations provides a solid evidence for nonzero
neutrino masses and leptonic mixing. The fact that neutrino masses are so tiny
constitutes a puzzling problem in particle physics. From the theoretical
viewpoint, the smallness of neutrino masses can be elegantly explained through
the seesaw mechanism. Another challenging issue for particle physics and
cosmology is the explanation of the matter-antimatter asymmetry observed in
Nature. Among the viable mechanisms, leptogenesis is a simple and
well-motivated framework. In this talk we briefly review these aspects, making
emphasis on the possibility of linking neutrino physics to the cosmological
baryon asymmetry originated from leptogenesis.Comment: 8 pages, 1 table, 1 figure; Based on talk given at the Symposium
STARS2011, 1 - 4 May 2011, Havana, Cuba; to be published in the Proceeding
Climate Change-induced Effects on Beach Degradation and Tourist Behaviour: A review of previous studies with potential in an island tourism context
This article conducts a qualitative meta-analysis of papers addressing the topic of climate change impacts on beach loss and degradation, and its relation to tourist behaviour (destination choice, willingness to re-visit, expenditure and willingness to pay). The main aim is to identify values that can be used in future research works in the context of island tourism. We found that the strong specialisation and fragmentation of data and methods limit the transferability potential of previous research analysing climate-induced effects on beaches and tourist behaviour. Researchers from different fields bring their own conceptual models which often address similar problems but use different lenses and measurement units. Among the available studies, the ones with usable potential in a value transfer context are related to willingness to pay for adaptation measures. Overall, findings confirm that a greater transparency in the methodologies used to elicit values and a multidisciplinary approach are needed to ensure a more sustainable use of the information in order to fill knowledge gaps that still hinder the study of climate change
LTE/NR V2X Communication Modes and Future Requirements of Intelligent Transportation Systems Based on MR-DC Architectures
[EN] This paper deals with the potential of Third Generation Partnership (3GPP) Project mobile cellular standards to enable vehicular communications. Starting from 3GPP Release 15, and Release 16 specifications for Vehicle-to-Everything (V2X) communications, the different communication modes, interfaces and use cases for V2X based on Long Term Evolution (LTE) and New Radio (NR) are analyzed. This research also studies the potential beneficial impact on V2X of a network that is aware of the underlying Multi-RAT Dual Connectivity (MR-DC) architecture. The methodology followed in this work consists of a review of 3GPP standards for vehicular communications based on mobile networks. The performance evaluation of the communication modes was performed through simulations taking into account resource allocation schemes, packet transmission frequencies, packet size, vehicle density and other parameters defined in the standard. In order to perform simulations of the decentralized communication mode (mode 4), a simulator based on OMNeT++ was configured. For the centralized mode (mode 3), an analytical model in MATLAB was used to configure different simulation scenarios. The results obtained indicate that LTE networks can only support basic V2X use cases because they do not demand strict potential requirements. Simulations showed that the centralized mode offers better performance than mode 4; however, it requires cellular network coverage. More advanced use cases are key for a future Intelligent Transport System (ITS), high-performance networks (i.e., Fifth Generation (5G), NR) are expected to coexist gradually with LTE in the V2X landscape. Therefore, in order to meet the strict requirements for latency, transmission speed and reliability, MR-DC architectures combining different radio access technologies, communication modes and connection interfaces should be deployed. In addition, operation in multi-operator and cross-border scenarios must be guaranteed.This research was supported by the European Union's H2020-ICT-18-2018 action "5G for cooperative, connected and automated mobility", for project "5G for Connected and Automated Road Mobility in the European unioN (5G-CARMEN)" under grant agreement no. 825012.González, EE.; Garcia-Roger, D.; Monserrat Del Río, JF. (2022). LTE/NR V2X Communication Modes and Future Requirements of Intelligent Transportation Systems Based on MR-DC Architectures. Sustainability. 14(7):1-19. https://doi.org/10.3390/su1407387911914
Chemically Distinct Nuclei and Outflowing Shocked Molecular Gas in Arp 220
We present the results of interferometric spectral line observations of Arp
220 at 3.5mm and 1.2mm from the Plateau de Bure Interferometer (PdBI), imaging
the two nuclear disks in HCN and , HCO and , and HNC as well as SiO and , HCN, and SO. The gas traced by SiO
has a complex and extended kinematic signature including a prominent P Cygni
profile, almost identical to previous observations of HCO. Spatial
offsets north and south of the continuum centre in the emission and
absorption of the SiO P Cygni profile in the western nucleus (WN)
imply a bipolar outflow, delineating the northern and southern edges of its
disk and suggesting a disk radius of pc, consistent with that found by
ALMA observations of Arp 220. We address the blending of SiO and
HCO by considering two limiting cases with regards to the
HCO emission throughout our analysis. Large velocity gradient (LVG)
modelling is used to constrain the physical conditions of the gas and to infer
abundance ratios in the two nuclei. Our most conservative lower limit on the
[HCN]/[HCO] abundance ratio is 11 in the WN, cf. 0.10 in the
eastern nucleus (EN). Comparing these ratios to the literature we argue on
chemical grounds for an energetically significant AGN in the WN driving either
X-ray or shock chemistry, and a dominant starburst in the EN.Comment: 28 pages, 17 figures, accepted to Ap
PACDIN statement of methods
This is an Accepted Manuscript of an article published by Taylor & Francis in Vehicle System Dynamics on 2014 available online: https://doi.org/10.1080/00423114.2014.963126[EN] PAntograph-Catenary Dynamic Interaction (PACDIN) is a code developed by the vehicle technology research centre (CITV) of the Universitat Politecnica de Valencia in collaboration with the railway company Talgo S.L. The model of the catenary is a finite element model using absolute nodal coordinates. It is based on a general formulation that can be applied for analysing a wide range of catenary configurations, including stitch wire, transitions or non-straight path tracks. The formulation is fully non-linear and includes large deformations, dropper slackening and contact interaction. The model is linearised when deformations are small, as in the case of the benchmark dynamic analysis. The results of the PACDIN code show a good agreement with the average results of other benchmark codes.The authors wish to thank Generatitat Valenciana for the financial support received in the framework of the PROMETEO 2012/023 Programme.Tur Valiente, M.; Baeza González, LM.; Fuenmayor Fernández, F.; Garcia, E. (2014). PACDIN statement of methods. Vehicle System Dynamics. 53(3):402-411. https://doi.org/10.1080/00423114.2014.963126S402411533Shabana, A. A. (1998). Nonlinear Dynamics, 16(3), 293-306. doi:10.1023/a:1008072517368BERZERI, M., & SHABANA, A. A. (2000). DEVELOPMENT OF SIMPLE MODELS FOR THE ELASTIC FORCES IN THE ABSOLUTE NODAL CO-ORDINATE FORMULATION. Journal of Sound and Vibration, 235(4), 539-565. doi:10.1006/jsvi.1999.2935Gerstmayr, J., & Shabana, A. A. (2006). Analysis of Thin Beams and Cables Using the Absolute Nodal Co-ordinate Formulation. Nonlinear Dynamics, 45(1-2), 109-130. doi:10.1007/s11071-006-1856-1Tur, M., García, E., Baeza, L., & Fuenmayor, F. J. (2014). A 3D absolute nodal coordinate finite element model to compute the initial configuration of a railway catenary. Engineering Structures, 71, 234-243. doi:10.1016/j.engstruct.2014.04.015Collina, A., & Bruni, S. (2002). Numerical Simulation of Pantograph-Overhead Equipment Interaction. Vehicle System Dynamics, 38(4), 261-291. doi:10.1076/vesd.38.4.261.828
Clean optical spectrum of the radio jet of 3C 120
We present integral field spectroscopy (IFS) of the central region of 3C 120. We have modeled the nuclear and host galaxy three-dimensional spectra using techniques normally applied to imaging, decoupling both components and obtaining a residual data cube. Using this residual data cube, we detected the extended emission line region associated with the radio jet. We obtained, for the first time, a clean spectrum of this region and found compelling evidence of a jet-cloud interaction. The jet compresses and splits the gas cloud, which is ionized by the active galactic nucleus (AGN ) and/or by the strong local UV photon field generated by a shock process. We cannot confirm the detection of an extended emission line region associated with the counterjet reported by Axon and coworkers.This project is part of the Euro3D RTN on IFS, funded by the EC under contract HPRN-CT-2002-00305. The WHT is operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the IAC. This project has used images obtained from the HST archive, using the ESO archiving facilities. We would like to thank R. C. Walker, who has kindly provided us with the radio maps of 3C 120. We would like to thank the anonymous referee, who has helped us to improve the quality of this paper with his/her remarks
Dynamical properties of liquid Al near melting. An orbital-free molecular dynamics study
The static and dynamic structure of liquid Al is studied using the orbital
free ab-initio molecular dynamics method. Two thermodynamic states along the
coexistence line are considered, namely T = 943 K and 1323 K for which X-ray
and neutron scattering data are available. A new kinetic energy functional,
which fulfills a number of physically relevant conditions is employed, along
with a local first principles pseudopotential. In addition to a comparison with
experiment, we also compare our ab-initio results with those obtained from
conventional molecular dynamics simulations using effective interionic pair
potentials derived from second order pseudopotential perturbation theory.Comment: 15 pages, 12 figures, 2 tables, submitted to PR
Pinnacle sets of signed permutations
Pinnacle sets record the values of the local maxima for a given family of
permutations. They were introduced by Davis-Nelson-Petersen-Tenner as a dual
concept to that of peaks, previously defined by Billey-Burdzy-Sagan. In recent
years pinnacles and admissible pinnacles sets for the type symmetric group
have been widely studied. In this article we define the pinnacle set of signed
permutations of types and . We give a closed formula for the number of
type / admissible pinnacle sets and answer several other related
enumerative questions.Comment: 15 pages, 3 figures, to appear in Discrete Mathematic
The Dense Molecular Gas and Nuclear Activity in the ULIRG IRAS 13120-5453
We present new ALMA Band 7 ( GHz) observations of the dense gas
tracers HCN, HCO, and CS in the local, single-nucleus, ultraluminous
infrared galaxy IRAS 13120-5453. We find centrally enhanced HCN (4-3) emission,
relative to HCO (4-3), but do not find evidence for radiative pumping of
HCN. Considering the size of the starburst (0.5 kpc) and the estimated
supernovae rate of yr, the high HCN/HCO ratio can be
explained by an enhanced HCN abundance as a result of mechanical heating by the
supernovae, though the active galactic nucleus and winds may also contribute
additional mechanical heating. The starburst size implies a high
of kpc, slightly below predictions of
radiation-pressure limited starbursts. The HCN line profile has low-level
wings, which we tentatively interpret as evidence for outflowing dense
molecular gas. However, the dense molecular outflow seen in the HCN line wings
is unlikely to escape the galaxy and is destined to return to the nucleus and
fuel future star formation. We also present modeling of Herschel observations
of the HO lines and find a nuclear dust temperature of K. IRAS
13120-5453 has a lower dust temperature and than is inferred for
the systems termed "compact obscured nuclei" (such as Arp 220 and Mrk 231). If
IRAS 13120-5453 has undergone a compact obscured nucleus phase, we are likely
witnessing it at a time when the feedback has already inflated the nuclear ISM
and diluted star formation in the starburst/AGN core.Comment: accepted for publication in ApJ, 21 pages, 11 figure
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