649 research outputs found
To what extent does disability discourage from work? An empirical analysis of labour force participation of disabled people in Italy
No full textThis paper is an empirical study on the work opportunities of people with disability
using Italian data collected through a survey carried out by ISTAT in 2004. Our analysis
is guided by the conceptual framework of the capability approach and investigates the
role of conversion factors in the ability to be employed and the type of employment.
We rst use a simple probit for labour force participation and then a sequential logit
for the outcomes of participation as well as employment status. In all variants we nd
that chronic illness is a stronger deterrent for labour force participation than disability.
Women are more discouraged by disability compared to men. Among the various types of
disabilities, `intellectual' disability is the strongest barrier as can be expected and hearing
the least in
uential. In a sequential decision-making process, we nd that disability
a ects both labour force participation decision and the ability to be employed but not so
much the choice between part-time and full-time
Does disability discourage? An empirical analysis of the disabled labour force in Italy
No full textThis paper is an empirical study on the work opportunities of people with disability using Italian data collected through a survey carried out by ISTAT in 2004. Our analysis is guided by the conceptual framework of the Capability Approach and investigates the role of conversion factors in the ability to be employed and the type of employment. We first use a simple probit for labour force participation and then a sequential logit model for the outcomes of participation as well as employment status. In all variants we find that chronic illness is a stronger deterrent for labour force participation than disability. Women are more discouraged by disability compared to men. For the disabled, intellectual disability is the strongest barrier as can be expected and hearing the least influential. In a sequential decision-making process, one finds that disability affects both labour force participation decision and the ability to be employed but not so much the choice between part time and full time
To What Extent does Disability Discourage from Going on the Job Market? Evidence from Italy
No full textPurpose: To investigate the extent to which disability discourages an individual from going on the job market, using data from an Italian survey.
Design/Methodology/Approach: We use an extended definition of labour force participation based on being employed or currently seeking work even if the persons declare themselves as housewives, students, retired or in any other condition other- wise. We use probit, sequential and multinomial logit models for analysing labour force participation and outcomes. We distinguish between the impact of disability in its strict sense and chronic illness explaining the difference.
Findings: In all variants we find that chronic illness is a stronger deterrent for labour force participation than disability. Women are more discouraged compared to men. Intellectual disability is the strongest barrier and hearing the least influential. In a sequential decision-making process, we find that disability affects both labour force participation decision and the ability to be employed but not so much the choice between part-time and full-time.
Originality/value: We have a unique data set from a survey which was specifically targeted at people who were identified as disabled in a previous survey. The Italian context is also special due to its high legal employment quotas and non-compliance sanctions.
Practical implications: Policies providing tailored solutions for improved access to education and health care for disabled persons will enhance their work opportunities.
Research limitations: Data set is cross-sectional and characterised by attrition. It would be interesting to compare results with a longitudinal and more representative data set
CdO-based nanostructures as novel CO2 gas sensors
No full textCrystalline Cd(OH)2/CdCO3 nanowires, having lengths in the range from 0.3 up to several
microns and 5–30 nm in diameter, were synthesized by a microwave-assisted wet chemical
route and used as a precursor to obtain CdO nanostructures after a suitable thermal treatment in
air. The morphology and microstructure of the as-synthesized and annealed materials have been
investigated by scanning electron microscopy, transmission electron microscopy, x-ray
diffraction and thermogravimetry–differential scanning calorimetry. The change in morphology
and electrical properties with temperature has revealed a wire-to-rod transformation along with
a decreases of electrical resistance.
Annealed samples were printed on a ceramic substrate with interdigitated contacts to
fabricate resistive solid state sensors. Gas sensing properties were explored by monitoring
CO2 in synthetic air in the concentration range 0.2–5 v/v% (2000–50 000 ppm). The effect of
annealing temperature, working temperature and CO2 concentration on sensing properties
(sensitivity, response/recovery time and stability) were investigated. The results obtained
demonstrate that CdO-based thick films have good potential as novel CO2 sensors for practical
applications
Excitation and exploration of autoionization state in O2 using XUV-harmonic pump and IR-laser probe
No full textStructural, optical and electrical characterization of antimony-substituted tin oxide nanoparticles
No full textAntimony-doped tin oxide (ATO) nanostructures were prepared using chemical precipitation technique starting from SnCl(2), SbCl(3) as precursor compounds. The antimony composition was varied from 5 to 20 wt%. The lower resistance was observed at composition of Sn:95 and Sb:05, when compared with undoped and higher doping concentration of antimony. The average crystalline size of undoped and doped tin oxide was calculated from the X-ray diffraction (XRD) pattern and found to be in the range of 30-11 nm and it was further confirmed from the transmission electron microscopy (TEM) studies. The scanning electron microscopy (SEM) analysis showed that the nanoparticles agglomerates forming spherical-shaped particles of few hundreds nanometers. The samples were further analyzed by energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and electrical resistance measurements. (C) 2009 Elsevier Ltd. All rights reserved
Chern-Simons theory of magnetization plateaus on the kagome lattice
No full textFrustrated spin systems on Kagome lattices have long been considered to be a promising candidate for realizing exotic spin liquid phases. Recently, there has been a lot of renewed interest in these systems with the discovery of experimental materials such as Volborthite and Herbertsmithite that have Kagome like structures. In this thesis I will focus on studying frustrated spin systems on the Kagome lattice using a spin-1/2 antiferromagnetic XXZ Heisenberg model in the presence of an external magnetic field as well as other perturbations. Such a system is expected to give rise to magnetization platueaus which can exhibit topological characteristics in certain regimes.
We will first develop a flux-attachment transformation that maps the Heisenberg spins (hard-core bosons) onto a problem of fermions coupled to a Chern-Simons gauge field. This mapping relies on being able to define a consistent Chern-Simons term on the lattice. Using this newly developed mapping we analyse the phases/magnetization plateaus that arise at the mean-field level and also consider the effects of adding fluctuations to various mean-fi eld states. Along the way, we show how to discretize an abelian Chern-Simons gauge theory on generic 2D planar lattices that satisfy certain conditions. We find that as long as there exists a one-to-one correspondence between the vertices and plaquettes defined on the graph, one can write down a discretized lattice version of the abelian Chern-Simons gauge theory.
Using the newly developed flux attachment transformation, we show the existence of chiral spin liquid
states for various magnetization plateaus for certain range of parameters in the XXZ Heisenberg model in the presence of an external magnetic field. Speci cally, in the regime of XY anisotropy the ground states at the 1/3 and 2/3 plateau are equivalent to a bosonic fractional quantum Hall Laughlin state with filling fraction 1/2 and that the 5/9 plateau is equivalent to the first bosonic Jain daughter state at filling fraction 2/3.
Next, we also consider the effects of several perturbations: a) a chirality term, b) a Dzyaloshinskii-Moriya term, and c) a ring-exchange type term on the bowties of the kagome lattice, and inquire if they can also support chiral spin liquids as ground states. We find that the chirality term leads to a chiral spin liquid even in the absence of an uniform magnetic field, with an effective spin Hall conductance of 1/2 in the regime of XY anisotropy. The Dzyaloshinkii-Moriya term also leads a similar chiral spin liquid but only when this term is not too strong. An external magnetic field when combined with some of the above perturbations also has the possibility of giving rise to additional plateaus which also behave like chiral spin liquids in the XY regime. Under the in influence of a ring-exchange term we find that provided its coupling constant is large enough, it may trigger a phase transition into a chiral spin liquid by the spontaneous breaking of time-reversal invariance.
Finally, we also present some numerical results based on some exact diagonalization studies. Here, we specifically focus on the 2/3-magnetization plateau which we previously argued should be a chiral spin liquid with a spin hall conductance of 1/2 . Such a topological state has a non-trivial ground state degeneracy and it excitations are described by semionic quasiparticles. In the numerical analysis, we analyse the ground state degeneracy structure on various Kagome clusters of different sizes. We compute modular matrices from the resultant minimally entangled states as well as the Chern numbers of various eigenstates all of which provide strong evidence that the 2/3-magnetization plateau very closely resembles a chiral spin liquid state with the expected characteristics.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-12-01The student, Ponnuraj Krishnakumar, accepted the attached license on 2016-11-23 at 22:00.The student, Ponnuraj Krishnakumar, submitted this Dissertation for approval on 2016-11-23 at 22:29.This Dissertation was approved for publication on 2016-11-29 at 10:54.DSpace SAF Submission Ingestion Package generated from Vireo submission #10318 on 2017-02-28 at 14:36:45Made available in DSpace on 2017-03-01T16:36:55Z (GMT). No. of bitstreams: 2
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Magnetic linear dichroism studies of in situ grown NiO thin films
No full textWe report thickness dependence of magnetic linear dichroism (MLD) of in situ grown NiO(001) films on Ag(001) substrate at the Ni L-2 absorption edge. Antiferromagnetic domains at the surface of NiO(001) films are found to be preferentially aligned in-plane. For films thinner than a critical thickness t(c) (20-40ML), we observe a softening of the in-plane magnetic domain alignments with increasing film thickness, arising from the strain-relaxation effects. Films thicker than t(c) exhibits a residual in-plane anisotropy, possibly related to the finite-thickness effects. (c) 2006 Elsevier B.V. All rights reserved
Author response
No full textWe recently reported that the C2AB portion of Synaptotagmin 1 (Syt1) could selfassemble into Ca2+-sensitive ring-like oligomers on membranes, which could potentially regulate neurotransmitter release. Here we report that analogous ring-like oligomers assemble from the C2AB domains of other Syt isoforms (Syt2, Syt7, Syt9) as well as related C2 domain containing protein, Doc2B and extended Synaptotagmins (E-Syts). Evidently, circular oligomerization is a general and conserved structural aspect of many C2 domain proteins, including Synaptotagmins. Further, using electron microscopy combined with targeted mutations, we show that under physiologically relevant conditions, both the Syt1 ring assembly and its rapid disruption by Ca2+ involve the well-established functional surfaces on the C2B domain that are important for synaptic transmission. Our data suggests that ring formation may be triggered at an early step in synaptic vesicle docking and positions Syt1 to synchronize neurotransmitter release to Ca2+ influx.Fil: Zanetti, Maria Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; ArgentinaFil: Bello, Oscar Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; ArgentinaFil: Wang, Jing. University of Yale. School of Medicine; Estados UnidosFil: Coleman, Jeff. University of Yale. School of Medicine; Estados UnidosFil: Cai, Yiying. University of Yale. School of Medicine; Estados UnidosFil: Sindelar, Charles V.. University of Yale. School of Medicine; Estados UnidosFil: Rothman, James E.. University of Yale. School of Medicine; Estados UnidosFil: Krishnakumar, Shyam S.. University of Yale. School of Medicine; Estados Unido
Consumer Preferences for Imported Kona Coffee in South India: A Latent Class Analysis
No full textConsidering India as a potential export market for 100% Kona coffee, this study explores consumer preferences for imported, specialty, high-end Kona coffee in South India. Conjoint choice experiment with latent class analysis is used and results indicate that India offers an export market potential for Kona coffee, provided it caters to consumer preferences. Results show a significant preference for strong taste. The relative importance of price is lower than taste but majority are also adverse to higher prices. However,15% of the sample population does not care about price but does care about taste, indicating the possibility of a high-end niche market segment. Based on the results, marketing strategies and policy recommendations have been suggested.India, US Coffee Export, Kona Coffee, Conjoint Choice Experiment, Latent Class Analysis, Agribusiness, Q13,
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