Search results for "HTA"
showing 10 items of 1313 documents
“They’re a little bit squeezed in the middle”: Strategic challenges for innovation in US Metropolitan newspaper organisations
2019
This paper focuses on media innovation among publishers of metropolitan newspapers in the United States, in cities such as San Diego, Boston, Miami, Philadelphia and Dallas. The situation for metropolitan newspapers is difficult, as they fall between national newspapers, which can aim for extending their reach both nationally and globally, and local newspapers, which have a smaller cost structure and can cater to a more limited, and often more engaged, audience community. Our paper demonstrates that there seems to be great awareness of what can be done by US metropolitan newspapers, but managers are struggling with constraints, such as lack of financial and human resources and general organ…
A systematic narrative review of prosociality in educational leadership
2018
Organizational scholars have vigorously and long studied being prosocial in defining ‘prosociality’ as motivation, behavior, and impact to help or benefit others. This study attempts to provide an overview of previous studies that have approached the elements of being prosocial in educational leadership contexts. However, most of the prosocial elements in education are not explicitly defined as prosociality and have not yet been systematically studied. Thus, this study explored the research questions: (a) What elements could be involved in prosociality within educational leadership? (b) Who could be involved in the process of prosociality in educational leadership? The final corpus of this …
Elementary school principals’ work from the ecological systems perspective: Evidence from Finland
2022
The present study aimed to investigate elementary school principals’ work from the ecological systems perspective and which elements of their work are experienced as demands or resources. Semi-structured interviews were conducted with 22 principals. Qualitative content analysis was used to analyse the data. The results show that the way principals experience their work is individual and influenced by several internal and external factors. Some of the most extensive demands appear to be related to interaction with different stakeholders in situations where principals have the role of mediator in solving conflicting situations. Challenges also seem to arise in dealing with elements or issues…
Monimuotoisuuden johtamisen ristiriitaisuus : diskurssianalyysi suomalaisista mediateksteistä
2010
The diversity management paradox – A discourse analysis of Finnish media texts The phenomenon called ‘diversity management’ originating in North America has recently emerged in Europe. Although the importance of a diverse workforce has been emphasised in Finland, research on diversity management has been rather limited. In this study, we examine the discursively constructed meanings of diversity and diversity management in Finnish media texts. On the basis of our analysis, we (re)constructed five discourses for understanding diversity and diversity management. Based on our analysis, we suggest that the significance of the diversity discussion in Finland lies primarily in encouraging busines…
Controlling magnetism through Ising superconductivity in magnetic van der Waals heterostructures
2022
Van der Waals heterostructures have risen as a tunable platform to combine different electronic orders, due to the flexibility in stacking different materials with competing symmetry broken states. Among them, van der Waals ferromagnets such as CrI3 and superconductors as NbSe2 provide a natural platform to engineer novel phenomena at ferromagnet-superconductor interfaces. In particular, NbSe2 is well known for hosting strong spin-orbit coupling effects that influence the properties of the superconducting state. Here we put forward a ferromagnet/NbSe2/ferromagnet heterostructure where the interplay between Ising superconductivity in NbSe2 and magnetism controls the magnetic alignment of the…
Nonlinear σ model for disordered systems with intrinsic spin-orbit coupling
2022
We derive the nonlinear σ model to describe diffusive transport in normal metals and superconductors with intrinsic spin-orbit coupling (SOC). The SOC is described via an SU(2) gauge field, and we expand the model to the fourth order in gradients to find the leading non-Abelian field-strength contribution. This contribution generates the spin-charge coupling that is responsible for the spin-Hall effect. We discuss how its symmetry differs from the leading quasiclassical higher-order gradient terms. We also derive the corresponding Usadel equation describing the diffusive spin-charge dynamics in superconducting systems. As an example, we apply the obtained equations to describe the anomalous…
Dynamics of Two Ferromagnetic Insulators Coupled by Superconducting Spin Current.
2021
A conventional superconductor sandwiched between two ferromagnets can maintain coherent equilibrium spin current. This spin supercurrent results from the rotation of odd-frequency spin correlations induced in the superconductor by the magnetic proximity effect. In the absence of intrinsic magnetization, the superconductor cannot maintain multiple rotations of the triplet component but instead provides a Josephson type weak link for the spin supercurrent. We determine the analog of the current-phase relation in various circumstances and show how it can be accessed in experiments on dynamic magnetization. In particular, concentrating on the magnetic hysteresis and the ferromagnetic resonance …
Current Rectification in Junctions with Spin-Split Superconductors
2022
Spin-split superconductors exhibit an electron-hole asymmetric spin-resolved density of states, but the symmetry is restored upon averaging over spin. On the other hand, asymmetry appears again in tunneling junctions of spin-split superconductors with a spin-polarized barrier. As demonstrated recently in both theory and experiment, this fact leads to a particularly strong thermoelectric effect in superconductor-ferromagnet structures. In this work we show another important effect stemming from the electron-hole asymmetry: current rectification. We calculate the charge current in spin-polarized tunnel junctions of a normal metal and a spin-split superconductor with ac and dc voltage bias. In…
Development of an Inductive NIS Thermometer
2012
We have studied an inductive readout for normal metal-insulator-superconductor (NIS) tunnel junctions by using on-chip planar inductors and a DC SQUID (superconducting quantum interference device) to develop a sensitive and fast thermometer for studies of nanoscale heat conduction and bolometry. Our initial results show the feasibility of the concept, with a good sensitivity for temperatures below 1 K for aluminum as the superconductor when voltage biased close to the superconductor energy gap. peerReviewed
Distinguishing Majorana Zero Modes from Impurity States through Time-Resolved Transport
2019
We study time-resolved charge transport in a superconducting nanowire using time-dependent Landauer-B{\"u}ttiker theory. We find that the steady-state Majorana zero-bias conductance peak emerges transiently accompanied by characteristic oscillations after a bias-voltage quench. These oscillations are absent for a trivial impurity state that otherwise shows a very similar steady-state signal as the Majorana zero mode. In addition, we find that Andreev bound states or quasi-Majorana states in the topologically trivial bulk phase can give rise to a zero-bias conductance peak, also retaining the transient properties of the Majorana zero mode. Our results imply that (1) time-resolved transport m…