6,884 research outputs found
Firm productivity, exchange rate movements, sources of finance and export orientation
We investigate the level and volatility effects of exchange rates on the productivity growth of manufacturing firms with heterogenous access to debt, and domestic and foreign equity markets in Turkey. We find that while exchange rate volatility affects productivity growth negatively, having access to foreign or domestic equity, or debt markets does not alleviate these effects. Furthermore, foreign owned or publicly traded companies do not appear to perform significantly better than the rest. We detect, however, that firm productivity is positively related to having access to external credit. Additionally, we find that while export (inward) oriented firms are affected less (more) by exchange rate appreciations, they are more (less) sensitive to exchange rate volatility
Trade Flows, Exchange Rate Uncertainty and Financial Depth: Evidence from 28 Emerging Countries
We investigate the effects of real exchange rate uncertainty and financial depth on manufactures exports from 28 emerging economies to the North and South over 1978-2005. We estimate a dynamic panel model using system GMM approach and show that for the majority of countries in our sample exchange rate uncertainty affects both South-South and South-North trade negatively. Furthermore, for several cases we discover that this effect is unidirectional, that is South-South or South-North. In addition, we find that while financial depth plays a trade-enhancing role, exchange rate shocks can negate this effect. We also show that trade among developing economies is likely to enhance export growth
The roles of products in product emotions an explorative study
Although several theoretical frameworks that aim to explain the emotional impact of product design have been introduced in design research literature, none of these frameworks clearly specifies the role of the product in these emotions. This paper reports a study that was designed to explore the variety of roles that products can play in emotional experiences. In a three staged experience sampling study, 29 participants produced 170 records of emotions experienced while interacting with products. Each case was examined in order to identify the antecedent event (the event triggering the emotion) and the mental object (what the emotion is about). The results indicated that several types of events involved in the user-product interaction can elicit an emotional experience: noticing a product; an event occurring during product usage; an entire usage episode; an external agent mentioning the product; and a change in the relationship between a user and a product . It was also found that the resulting emotional responses can be about (can be attributed to) several types of mental objects: a physical object, such as the particular product involved; the user or some other person; the actions of the user or the designer; the antecedent event itself. The results are used to identify and discuss eight distinct roles that products can play in the experience of emotions. In addition, examples are provided to illustrate how these roles can facilitate a structured approach to design for emotion.
Keywords:
Design and emotion, user-product interaction</p
Waveform Design for 5G and Beyond
5G is envisioned to improve major key performance indicators (KPIs), such as
peak data rate, spectral efficiency, power consumption, complexity, connection
density, latency, and mobility. This chapter aims to provide a complete picture
of the ongoing 5G waveform discussions and overviews the major candidates. It
provides a brief description of the waveform and reveals the 5G use cases and
waveform design requirements. The chapter presents the main features of cyclic
prefix-orthogonal frequency-division multiplexing (CP-OFDM) that is deployed in
4G LTE systems. CP-OFDM is the baseline of the 5G waveform discussions since
the performance of a new waveform is usually compared with it. The chapter
examines the essential characteristics of the major waveform candidates along
with the related advantages and disadvantages. It summarizes and compares the
key features of different waveforms.Comment: 22 pages, 21 figures, 2 tables; accepted version (The URL for the
final version:
https://onlinelibrary.wiley.com/doi/abs/10.1002/9781119333142.ch2
Realistic Gluino Axion Model Consistent with Supersymmetry Breaking at the TeV Scale
The recently proposed model of using the dynamical phase of the gluino to
solve the strong CP problem is shown to admit a specific realization in terms
of fundamental singlet superfields, such that the breaking of supersymmetry
occurs only at the TeV scale, despite the large axion scale of 10^{9} to
10^{12} GeV. Phenomenological implications are discussed.Comment: 12 pp, 2 fig
Q-ball formation in the MSSM with explicit CP violation
Q-balls generically exist in the supersymmetric extensions of the standard
model. Taking into account the additional sources of CP violation, which are
naturally accomodated by the supersymmetric models, it is shown that the Q-ball
matter depends additively on individual CP phases, whereas mass per unit charge
in the Q-ball depends only on the relative phases. There are regions of the
parameter space where there is no stable Q-ball solution in the CP-conserving
limit whereas finite CP phases induce a stable Q-ball.Comment: 6 p
Identification of the Atomic Scale Structures of the Gold-Thiol Interfaces of Molecular Nanowires by Inelastic Tunneling Spectroscopy
We examine theoretically the effects of the bonding geometries at the
gold-thiol interfaces on the inelastic tunneling spectra of propanedithiolate
(PDT) molecules bridging gold electrodes and show that inelastic tunneling
spectroscopy combined with theory can be used to determine these bonding
geometries experimentally. With the help of density functional theory, we
calculate the relaxed geometries and vibrational modes of extended molecules
each consisting of one or two PDT molecules connecting two gold nanoclusters.
We formulate a perturbative theory of inelastic tunneling through molecules
bridging metal contacts in terms of elastic transmission amplitudes, and use
this theory to calculate the inelastic tunneling spectra of the gold-PDT-gold
extended molecules. We consider PDT molecules with both trans and gauche
conformations bound to the gold clusters at top, bridge and hollow bonding
sites. Comparing our results with the experimental data of Hihath et al. [Nano
Lett. 8, 1673 (2008)], we identify the most frequently realized conformation in
the experiment as that of trans molecules top-site bonded to both electrodes.
We find the switching from the 42 meV vibrational mode to the 46 meV mode
observed in the experiment to be due to the transition of trans molecules from
mixed top-bridge to pure top-site bonding geometries. Our results also indicate
that gauche molecular conformations and hollow site bonding did not contribute
significantly to the experimental inelastic tunneling spectra. For pairs of PDT
molecules connecting the gold electrodes in parallel we find total elastic
conductances close to twice those of single molecules bridging the contacts
with similar bonding conformations and small splittings of the vibrational mode
energies for the modes that are the most sensitive to the molecule-electrode
bonding geometries.Comment: 14 pages, 8 figures, 1 table. arXiv admin note: significant text
overlap with arXiv:1103.2378;
http://jcp.aip.org/resource/1/jcpsa6/v136/i1/p014703_s
Neutrino Masses and the Gluino Axion Model
We extend the recently proposed gluino axion model to include neutrino
masses. We discuss how the canonical seesaw model and the Higgs triplet model
may be realized in this framework. In the former case, the heavy singlet
neutrinos are contained in superfields which do not have any vacuum expectation
value, whereas the gluino axion is contained in one which does. We also
construct a specific renormalizable model which realizes the mass scale
relationship , where is the axion decay constant
and is a large effective mass parameter.Comment: 8 pages, no figur
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