| 1. |
- Annarelli, Alessandro, et al.
(författare)
-
Literature review on digitalization capabilities : Co-citation analysis of antecedents, conceptualization and consequences
- 2021
-
Ingår i: Technological forecasting & social change. - : Elsevier. - 0040-1625 .- 1873-5509. ; 166
-
Forskningsöversikt (refereegranskat)abstract
- Recent decades have witnessed increased number of studies focusing on digitalization and related capabilities. Across disciplines digitalization capability is viewed as a sources of sustained competiveness. Nonetheless, several issues related to conceptualizing digitalization capabilities remain ambivalent. The present study, uses co-citation analysis to clarify concept of digitalization capability and identify three underlining capabilities, namely digital integration capabilities, digital platform capabilities, and digital innovation capabilities, that represents micro-foundation of digitalization capabilities. Further, a capability-based model is developed which includes antecedents and consequences of digitalization capabilities in an integrated conceptual model. Suggestions for future research, theoretical contributions and managerial contributions are also presented.
|
|
| 2. |
- Nabizadeh, Armin, et al.
(författare)
-
A search for high-redshift direct-collapse black hole candidates in the PEARLS north ecliptic pole field
- 2024
-
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 683
-
Tidskriftsartikel (refereegranskat)abstract
- Direct-collapse black holes (DCBHs) of mass ∼ 104-105 M⊙ that form in HI-cooling halos in the early Universe are promising progenitors of the greater than or similar to 109 M⊙ supermassive black holes that fuel observed z greater than or similar to 7 quasars. Efficient accretion of the surrounding gas onto such DCBH seeds may render them sufficiently bright for detection with the JWST up to z ≈ 20. Additionally, the very steep and red spectral slope predicted across the ≈ 1-5 μm wavelength range of the JWST/NIRSpec instrument during their initial growth phase should make them photometrically identifiable up to very high redshifts. In this work, we present a search for such DCBH candidates across the 34 arcmin2 in the first two spokes of the JWST cycle-1 PEARLS survey of the north ecliptic pole time-domain field covering eight NIRCam filters down to a maximum depth of ∼ 29 AB mag. We identify two objects with spectral energy distributions consistent with the Pacucci et al. (2016) DCBH models. However, we also note that even with data in eight NIRCam filters, objects of this type remain degenerate with dusty galaxies and obscured active galactic nuclei over a wide range of redshifts. Follow-up spectroscopy would be required to pin down the nature of these objects. Based on our sample of DCBH candidates and assumptions on the typical duration of the DCBH steep-slope state, we set a conservative upper limit of less than or similar to 5x10-4 comoving Mpc-3 (cMpc-3) on the comoving density of host halos capable of hosting DCBHs with spectral energy distributions similar to the Pacucci et al. (2016) models at z ≈ 6-14.
|
|
