Europium cyclooctatetraene nanowire carpets: A low-dimensional, organometallic, and ferromagnetic insulator

We investigate the magnetic and electronic properties of europium cyclooctatetraene (EuCot) nanowires by means of low-temperature X-ray magnetic circular dichroism (XMCD) and scanning tunneling microscopy (STM) and spectroscopy (STS). The EuCot nanowires are prepared in situ on a graphene surface. STS measurements identify EuCot as an insulator with a minority band gap of 2.3 eV. By means of Eu M5,4 edge XMCD, orbital and spin magnetic moments of (−0.1 ± 0.3)μB and (+7.0 ± 0.6)μB, respectively, were determined. Field-dependent measurements of the XMCD signal at the Eu M5 edge show hysteresis for grazing X-ray incidence at 5 K, thus confirming EuCot as a ferromagnetic material. Our density functional theory calculations reproduce the experimentally observed minority band gap. Modeling the experimental results theoretically, we find that the effective interatomic exchange interaction between Eu atoms is on the order of millielectronvolts, that magnetocrystalline anisotropy energy is roughly half as big, and that dipolar energy is approximately ten times lower

GRIPS - Gamma-Ray Imaging, Polarimetry and Spectroscopy

We propose to perform a continuously scanning all-sky survey from 200 keV to 80 MeV achieving a sensitivity which is better by a factor of 40 or more compared to the previous missions in this energy range (COMPTEL, INTEGRAL; see Fig. 1). The Gamma-Ray Imaging, Polarimetry and Spectroscopy (“GRIPS”) mission addresses fundamental questions in ESA’s Cosmic Vision plan. Among the major themes of the strategic plan, GRIPS has its focus on the evolving, vio-lent Universe, exploring a unique energy window. We propose to investigate γ-ray bursts and blazars, the mechanisms behind supernova explosions, nucleosynthesis and spallation, the enigmatic origin of positrons in our Galaxy, and the nature of radiation processes and particle acceleration in extreme cosmic sources including pulsars and magnetars. The natural energy scale for these non-thermal processes is of the order of MeV. Although they can be partially and indirectly studied us-ing other methods, only the proposed GRIPS measurements will provide direct access to their primary photons. GRIPS will be a driver for the study of transient sources in the era of neutrino and gravitational wave observatories such as Ice-CUBE and LISA, establishing a new type of diagnostics in relativistic and nuclear astrophysics. This will support extrapolations to investigate star formation, galaxy evolution, and black hole formation at high redshifts

GRIPS - Gamma-Ray Imaging, Polarimetry and Spectroscopy

We propose to perform a continuously scanning all-sky survey from 200 keV to 80 MeV achieving a sensitivity which is better by a factor of 40 or more compared to the previous missions in this energy range. The Gamma-Ray Imaging, Polarimetry and Spectroscopy (GRIPS) mission addresses fundamental questions in ESA's Cosmic Vision plan. Among the major themes of the strategic plan, GRIPS has its focus on the evolving, violent Universe, exploring a unique energy window. We propose to investigate $\gamma$-ray bursts and blazars, the mechanisms behind supernova explosions, nucleosynthesis and spallation, the enigmatic origin of positrons in our Galaxy, and the nature of radiation processes and particle acceleration in extreme cosmic sources including pulsars and magnetars. The natural energy scale for these non-thermal processes is of the order of MeV. Although they can be partially and indirectly studied using other methods, only the proposed GRIPS measurements will provide direct access to their primary photons. GRIPS will be a driver for the study of transient sources in the era of neutrino and gravitational wave observatories such as IceCUBE and LISA, establishing a new type of diagnostics in relativistic and nuclear astrophysics. This will support extrapolations to investigate star formation, galaxy evolution, and black hole formation at high redshifts.Comment: to appear in Exp. Astron., special vol. on M3-Call of ESA's Cosmic Vision 2010; 25 p., 25 figs; see also www.grips-mission.e

A JWST survey of the supernova remnant Cassiopeia A

We present initial results from a James Webb Space Telescope (JWST) survey of the youngest Galactic core-collapse supernova remnant, Cassiopeia A (Cas A), made up of NIRCam and MIRI imaging mosaics that map emission from the main shell, interior, and surrounding circumstellar/interstellar material (CSM/ISM). We also present four exploratory positions of MIRI Medium Resolution Spectrograph integral field unit spectroscopy that sample ejecta, CSM, and associated dust from representative shocked and unshocked regions. Surprising discoveries include (1) a weblike network of unshocked ejecta filaments resolved to ∼0.01 pc scales exhibiting an overall morphology consistent with turbulent mixing of cool, low-entropy matter from the progenitor’s oxygen layer with hot, high-entropy matter heated by neutrino interactions and radioactivity; (2) a thick sheet of dust-dominated emission from shocked CSM seen in projection toward the remnant’s interior pockmarked with small (∼1″) round holes formed by ≲0.″1 knots of high-velocity ejecta that have pierced through the CSM and driven expanding tangential shocks; and (3) dozens of light echoes with angular sizes between ∼0.″1 and 1′ reflecting previously unseen fine-scale structure in the ISM. NIRCam observations place new upper limits on infrared emission (≲20 nJy at 3 μm) from the neutron star in Cas A’s center and tightly constrain scenarios involving a possible fallback disk. These JWST survey data and initial findings help address unresolved questions about massive star explosions that have broad implications for the formation and evolution of stellar populations, the metal and dust enrichment of galaxies, and the origin of compact remnant objects

"We are each other's everyday lives" : Onboarding of new employees

Title: “We are each other's everyday lives” - Onboarding of new employees Purpose: Examine the work with acclimatization of new employees to the organizational culture. Method: A qualitative study of how new employees can be acclimatized through theonboarding process to the organizational culture. The study is conducted with a deductiveapproach and the empirical data was collected through semi-structured interviews. Conclusion: The result of the study shows four criteria’s that are important to give new employees as goodconditions as possible to acclimate them to the organizational culture. The first finding of thestudy is that organizations need to consider which employee they choose to hire to be able togive the new employee the best opportunity to acclimate to the organizational culture and thata structured onboarding process is better than an unstructured onboarding process. Furthermore, the study found that organizations should introduce an early first impression ofthe culture to introduce the new employee to the organizational culture. An early introductionof the organizational culture contributes with the opportunity for new employees toacclimatize to the organizational culture faster than if the new employee needs to discoverwhat culture that prevails on their own. The organization should also work with differentplatforms to project the culture onto the new employee in the workplace through differentactivities or with the help of existing employees. Key Words: Acclimatization, Organizational Culture, Onboarding, Norms, Values

"We are each other's everyday lives" : Onboarding of new employees

Title: “We are each other's everyday lives” - Onboarding of new employees Purpose: Examine the work with acclimatization of new employees to the organizational culture. Method: A qualitative study of how new employees can be acclimatized through theonboarding process to the organizational culture. The study is conducted with a deductiveapproach and the empirical data was collected through semi-structured interviews. Conclusion: The result of the study shows four criteria’s that are important to give new employees as goodconditions as possible to acclimate them to the organizational culture. The first finding of thestudy is that organizations need to consider which employee they choose to hire to be able togive the new employee the best opportunity to acclimate to the organizational culture and thata structured onboarding process is better than an unstructured onboarding process. Furthermore, the study found that organizations should introduce an early first impression ofthe culture to introduce the new employee to the organizational culture. An early introductionof the organizational culture contributes with the opportunity for new employees toacclimatize to the organizational culture faster than if the new employee needs to discoverwhat culture that prevails on their own. The organization should also work with differentplatforms to project the culture onto the new employee in the workplace through differentactivities or with the help of existing employees. Key Words: Acclimatization, Organizational Culture, Onboarding, Norms, Values

Open Science - Educational Research Data Management System : Development of a CAMA-system

Denna rapport beskriver projektet Managing education research data. Utförandet av projektet är en del av kursen TDDD96 - Kandidatprojekt i programvaruutveckling våren 2024. Beställaren av systemet är Lucija Batinovic, doktorand på FUSA (IBL) vid Linköpings universitet. Rapporten behandlar frågeställningarna hur en applikation som tillämpar konceptet Community-augmented meta-analysis (CAMA) kan utvecklas för att maximera kundvärdet, vilka lärdomar som kan dokumenteras från programvaruprojektet som är intressanta till framtida projekt, vilket stöd man kan få genom att skapa och följa upp en systemanatomi samt hur en databas kan utformas för att optimera söktid. Målet med applikationen är att ge en samlad plattform för delning av data från öppen vetenskap kopplad till lärande, en plattform för så kallad Community-augmented meta-analysis. Slutsatsen blev att värde skapades för kunden genom att analysera kundens krav och genom projektgruppens tekniska erfarenheter fylla på med fler krav för att möta kundens verkliga behov. De överförbara lärdomar som kunde dokumenteras var bland annat de processrelaterade erfarenheterna från den agila arbetsmetoden. Systemanatomins betydelse visade sig vara att den medför en förståelse för hur systemet ska fungera samt tydliggör beroenden inomsystemet. Slutligen konstaterades att en metod för att optimera söktiden i en databas kan vara normalisering

Europium Cyclooctatetraene Nanowire Carpets: A Low-Dimensional, Organometallic, and Ferromagnetic Insulator

We investigate the magnetic and electronic properties of europium cyclooctatetraene (EuCot) nanowires by means of low-temperature X-ray magnetic circular dichroism (XMCD) and scanning tunneling microscopy (STM) and spectroscopy (STS). The EuCot nanowires are prepared in situ on a graphene surface. STS measurements identify EuCot as an insulator with a minority band gap of 2.3 eV. By means of Eu M-5,M-4 edge XMCD, orbital and spin magnetic moments of (-0.1 +/- 0.3)mu(B) and (+7.0 +/- 0.6)mu(B), respectively, were determined. Field-dependent measurements of the XMCD signal at the Eu M-5 edge show hysteresis for grazing X-ray incidence at 5 K, thus confirming EuCot as a ferromagnetic material. Our density functional theory calculations reproduce the experimentally observed minority band gap. Modeling the experimental results theoretically, we find that the effective interatomic exchange interaction between Eu atoms is on the order of millielectronvolts, that magnetocrystalline anisotropy energy is roughly half as big, and that dipolar energy is approximately ten times lower