96 research outputs found
Exploring the potential of coworking spaces for quality of working life and wellbeing: A systematic review of academic literature
Coworking spaces (CSs) have gained significant attention in the last decades as an alternative to traditional offices and homes. These spaces offer a flexible and collaborative environment that caters to the needs of freelancers, entrepreneurs, and remote workers. The purpose of this paper is to systematically review academic literature to investigate how CSs contribute to workers' quality of working life (QWL) and wellbeing. Literature is analysed thematically following the QWL framework proposed by Walton (1973). The findings of this review suggest that CSs may act as a quasi-organisation by emulating the role traditionally undertaken by employers contributing to different aspects of workers’ QWL, which ultimately affect their wellbeing. CSs’ contribution largely depends on the different material features of the spaces, the services offered, the work culture promoted, the curation activity of the host, the coworking members, and the complex interrelation among all these elements. In the conclusive section, the review identifies potential research gaps and areas for future research in this field.publicad
Bouncing transient currents and SQUID-like voltage in nano devices at half filling
Nanorings asymmetrically connected to wires show different kinds of quantum
interference phenomena under sudden excitations and in steady current
conditions. Here we contrast the transient current caused by an abrupt bias to
the magnetic effects at constant current. A repulsive impurity can cause charge
build-up in one of the arms and reverse current spikes.
Moreover, it can cause transitions from laminar current flow to vortices, and
also change the chirality of the vortex. The magnetic behavior of these devices
is also very peculiar. Those nano-circuits which consist of an odd number of
atoms behave in a fundamentally different manner compared to those which
consist of an even number of atoms. The circuits having an odd number of sites
connected to long enough symmetric wires are diamagnetic; they display
half-fluxon periodicity induced by many-body symmetry even in the absence of
electron-phonon and electron-electron interactions. In principle one can
operate a new kind of quantum interference device without superconductors.
Since there is no gap and no critical temperature, one predicts qualitatively
the same behavior at and above room temperature, although with a reduced
current. The circuits with even site numbers, on the other hand, are
paramagnetic.Comment: 7 pages, 10 figures, accepted by Phys. Rev.
Exploring the potential of coworking spaces for quality of working life and wellbeing: a systematic review of academic literature
Coworking spaces (CSs) have gained significant attention in the last decades as an alternative to traditional offices and homes. These spaces offer a flexible and collaborative environment that caters to the needs of freelancers, entrepreneurs, and remote workers. The purpose of this paper is to systematically review academic literature to investigate how CSs contribute to workers' quality of working life (QWL) and wellbeing. Literature is analysed thematically following the QWL framework proposed by Walton (1973). The findings of this review suggest that CSs may act as a quasi-organisation by emulating the role traditionally undertaken by employers contributing to different aspects of workers’ QWL, which ultimately affect their wellbeing. CSs’ contribution largely depends on the different material features of the spaces, the services offered, the work culture promoted, the curation activity of the host, the coworking members, and the complex interrelation among all these elements. In the conclusive section, the review identifies potential research gaps and areas for future research in this field
characterization of double aluminium alloy specimens after ecap
Abstract The Equal Channel Angular Processing or pressing, i.e. the ECAP, allows to modify the properties of materials at the microstructure level. It consists in the induction of a high amount of shear deformation in the material that leads in general to a grain size refinement, a precipitate dispersion and a redistribution of dislocations depending on experiment conditions. The objective of the present investigation is to understand how the ECAP can influence the surface and the bulk mechanical properties of double aluminium alloy specimens. Each specimen was composed of a tubular part of the series AA6026 as well as of a cylindrical part of the series AA6012 assembled together before ECAP. A negligible bonding effect was observed after ECAP and after uniaxial compression tests performed at constant temperatures varying between 200 and 300°C with different press ram velocities. The characterization of each ECAP condition was initially represented in terms of the stress versus deformation flow curves. The load versus stroke curves were preferred due to the friction acting at the forming tool- specimen interface. It was obtained a decrease in the load versus stroke levels with increasing the number of ECAP passes under the experiment conditions of the present investigation. The increase in the press ram velocity determined an increase in the load for a given stroke
Magnonic Charge Pumping via Spin-Orbit Coupling
The interplay between spin, charge, and orbital degrees of freedom has led to
the development of spintronic devices like spin-torque oscillators, spin-logic
devices, and spin-transfer torque magnetic random-access memories. In this
development spin pumping, the process where pure spin-currents are generated
from magnetisation precession, has proved to be a powerful method for probing
spin physics and magnetisation dynamics. The effect originates from direct
conversion of low energy quantised spin-waves in the magnet, known as magnons,
into a flow of spins from the precessing magnet to adjacent normal metal leads.
The spin-pumping phenomenon represents a convenient way to electrically detect
magnetisation dynamics, however, precessing magnets have been limited so far to
pump pure spin currents, which require a secondary spin-charge conversion
element such as heavy metals with large spin Hall angle or multi-layer layouts
to be detectable. Here, we report the experimental observation of charge
pumping in which a precessing ferromagnet pumps a charge current, demonstrating
direct conversion of magnons into high-frequency currents via the relativistic
spin-orbit interaction. The generated electric current, differently from spin
currents generated by spin-pumping, can be directly detected without the need
of any additional spin to charge conversion mechanism and amplitude and phase
information about the relativistic current-driven magnetisation dynamics. The
charge-pumping phenomenon is generic and gives a deeper understanding of the
recently observed spin-orbit torques, of which it is the reciprocal effect and
which currently attract interest for their potential in manipulating magnetic
information. Furthermore, charge pumping provides a novel link between
magnetism and electricity and may find application in sourcing alternating
electric currents.Comment: 3 figure
A Fatal Case of Endocarditis on CoreValve ReValving System Caused by Enterococcus faecium Complicated by Iatrogenic Pancytopenia and Subacute Disseminated Intravascular Coagulation
During the past few years, a new and attractive approach--transcatheter aortic valve implantation (TAVI)--has been developed for patients who are symptomatic of aortic stenosis and, due to the high expected operative risk, would not be otherwise treated. Unfortunately, TAVI can result in endocarditis of the percutaneously implanted valve that may present atypically and cause delays in diagnosis and treatment. Herein, the case is described of a 79-year-old female affected by endocarditis on aortic valve percutaneously implanted caused by Enterococcus faecium, complicated by iatrogenic pancytopenia and subacute disseminated intravascular coagulation, that proved fatal at six months after TAVI.During the past few years, a new and attractive approach--transcatheter aortic valve implantation (TAVI)--has been developed for patients who are symptomatic of aortic stenosis and, due to the high expected operative risk, would not be otherwise treated. Unfortunately, TAVI can result in endocarditis of the percutaneously implanted valve that may present atypically and cause delays in diagnosis and treatment. Herein, the case is described of a 79-year-old female affected by endocarditis on aortic valve percutaneously implanted caused by Enterococcus faecium, complicated by iatrogenic pancytopenia and subacute disseminated intravascular coagulation, that proved fatal at six months after TAVI
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Terahertz Time-Domain Spectroscopy
Terahertz Time-Domain Spectroscopy (THz TDS) has attracted attention from many scientific disciplines as it enables accessing the gap between electronic and optical techniques. One application is to probe spintronic dynamics in sub-picosecond time scale. Here, we discuss the principles and the technical aspects of a typical THz TDS setup. We also show an example of terahertz time-domain data obtained from a Co/Pt thin film, a well-studied spintronic structure that emits strong THz radiation.The Winton Programme for the Physics of Sustainability, Royal Society, ERC Starting Grant (ACrossWire grant number 716471), EPSRC through a Programme Grant (EP/M50807/1), and International Network (EP/P026311/1)
Helicity-dependent Ultrafast Photocurrents in Weyl Magnet MnSn
We present an optical pump-THz emission study on non-collinear
antiferromagnet MnSn. We show that MnSn acts as a source of THz
radiation when irradiated by femtosecond laser pulses. The polarity and
amplitude of the emitted THz fields can be fully controlled by the polarisation
of optical excitation. We explain the THz emission with the photocurrents
generated via the photon drag effect by combining various experimental
measurements as a function of pump polarisation, magnetic field, and sample
orientation with thorough symmetry analysis of response tensors.Comment: 10+13 pages; 4+5 figure
Early protein intake influences neonatal brain measurements in preterms: an observational study
Introduction: To limit extrauterine growth restriction, recent guidelines on nutrition of preterm neonates recommended high protein intake since the first day of life (DOL). The impact of this nutritional strategy on the brain is still controversial. We aimed to evaluate the effects of protein intake on early cerebral growth in very low birth weight newborns. Materials and Methods: We performed serial cranial ultrasound (cUS) scans at 3-7 DOL and at 28 DOL in very low birth weight newborns consecutively observed in the neonatal intensive care unit. We analyzed the relation between protein intake and cerebral measurements at 28 DOL performed by cUS. Results: We enrolled 100 newborns (gestational age 29 ± 2 weeks, birth weight 1,274 ± 363 g). A significant (p < 0.05) positive correlation between enteral protein intake and biparietal diameter (r = 0.490**), occipital-frontal diameter (r = 0.608**), corpus callosum (length r = 0.293*, genu r = 0.301*), caudate head (right r = 0.528**, left r = 0.364**), and cerebellum (transverse diameter r = 0.440**, vermis height r = 0.356**, vermis width r = 0.377**) was observed at 28 DOL. Conversely, we found a significant negative correlation of protein intake given by parenteral nutrition (PN) with biparietal diameter (r = -0.524**), occipital-frontal diameter (r = -0.568**), body of corpus callosum (r = -0.276*), caudate head (right r = -0.613**, left r = -0.444**), and cerebellum (transverse diameter r = -0.403**, vermis height r = -0.274*, vermis width r = -0.462**) at 28 DOL. Multivariate regression analysis showed that measurements of occipital-frontal diameter, caudate head, and cerebellar vermis at 28 DOL depend positively on protein enteral intake (r = 0.402*, r = 0.305*, and r = 0.271*) and negatively by protein parenteral intake (r = -0.278*, r = -0.488*, and r = -0.342*). Conclusion: Brain development in neonatal life depends on early protein intake. High protein intake affects cerebral structures' measurements of preterm newborn when administered by PN. Positive impact on brain development encourages the administration of recommended protein intake mainly by enteral nutrition
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