360VR PBL: A New Format of Digital Cases in Clinical Medicine

In this paper, we present and discuss an explorative study on the use of a social 360° virtual reality (360VR) for supporting case-based Problem Based Learning (case-PBL) in clinical medical education. In the context of case-PBL, we argue that our social 360VR learning space extends the design and application of cases in medical education by including elements from project-PBL. Three groups tested the learning design as a part of the clinical exercises in their 5. Semester bachelor course. After the social 360VR activity, the students performed a physical examination of the collateral and cruciate ligaments of the knee like the one in the training material. Our preliminary findings indicate that the students immersed in social 360VR collaboratively establish a mutual understanding of how to perform the examination through identifying problems related to the examination and by taking responsibility for their own and the other group members learning

Kollaborativ læring i social 360VR: Et systematisk review af et nyt digitalt læringsrum

Virtual Reality (VR) vinder større og større indpas på tværs af uddannelsesniveauer. De seneste års teknologiske udvikling har endvidere gjort VR mere tilgængelig for uddannelsesinstitutioner – særligt foranlediget af udviklingen af 360°VR (360VR). Med 360VR kan undervisere designe aktiviteter, hvor studerende får adgang til at arbejde med autentisk videomateriale fra praksis – det kunne være pædagoger, lærere, sygeplejersker og læger. Gennem et systematisk review viser vi at særligt kollaborativ læring i 360VR er tæt på ikke eksisterende. Med udgangspunkt i tre pilotforsøg, viser vi hvordan man kan arbejde med at designe for kollaborativ læring i social 360VR. Vores resultater peger på, at kollaborativ læring i social 360VR skal forstås ud fra en anden begrebsramme end traditionel VR. I skiftet fra individuel VR til social VR opstår et behov for andre begreber end ”immersion”, ”interactivity” og ”presence” – og vi forslår at udviklingen tager afsæt i begreber som interaktionelle ressourcer og perspektivtagning.Virtual Reality (VR) is rapidly gaining attention across educational levels. Technological advances in recent years have further made VR more accessible for educational institutions - especially due to developments in 360° VR (360VR). With 360VR educators can design activities where students gain access to working with authentic video-footage from practice – be it pedagogues, teachers, nurses or doctors. Through a systematic review we show that collaborative learning in 360VR is almost non-existent. In the paper we present three pilot experiments with collaborative learning in social 360VR. Our results indicate that collaborative learning in 360VR must be understood from a different set of concepts than what is used when working with traditional forms of VR. In shifting from individual to social VR, a need for terms going beyond “immersion”, “interactivity” and “presence” arises - and we suggest that the conceptual framework should be grounded in terms such as interactional resources and perspective-taking

Melt in the Greenland EastGRIP ice core reveals Holocene warm events

We present a record of melt events obtained from the East Greenland Ice Core Project (EastGRIP) ice core in central northeastern Greenland, covering the largest part of the Holocene. The data were acquired visually using an optical dark-field line scanner. We detect and describe melt layers and lenses, seen as bubble-free layers and lenses, throughout the ice above the bubble–clathrate transition. This transition is located at 1150 m depth in the EastGRIP ice core, corresponding to an age of 9720 years b2k. We define the brittle zone in the EastGRIP ice core as that from 650 to 950 m depth, where we count on average more than three core breaks per meter. We analyze melt layer thicknesses, correct for ice thinning, and account for missing layers due to core breaks. Our record of melt events shows a large, distinct peak around 1014 years b2k (986 CE) and a broad peak around 7000 years b2k, corresponding to the Holocene Climatic Optimum. In total, we can identify approximately 831 mm of melt (corrected for thinning) over the past 10 000 years. We find that the melt event from 986 CE is most likely a large rain event similar to that from 2012 CE, and that these two events are unprecedented throughout the Holocene. We also compare the most recent 2500 years to a tree ring composite and find an overlap between melt events and tree ring anomalies indicating warm summers. Considering the ice dynamics of the EastGRIP site resulting from the flow of the Northeast Greenland Ice Stream (NEGIS), we find that summer temperatures must have been at least 3 ± 0.6 ∘C warmer during the Early Holocene compared to today

How warm was Greenland during the last interglacial period?

The last interglacial period (LIG, ~ 129–116 thousand years ago) provides the most recent case study for multi-millennial polar warming above pre-industrial level and a respective response of the Greenland and Antarctic ice sheets to this warming, as well as a test bed for climate and ice sheet models. Past changes in Greenland ice sheet thickness and surface temperature during this period were recently derived from the NEEM ice core records, North-West Greenland. The NEEM paradox has emerged from an estimated large local warming above pre-industrial level (7.5 ± 1.8 °C at the deposition site 126 ka ago without correction for any overall ice sheet altitude changes between the LIG and pre-industrial) based on water isotopes, together with limited local ice thinning, suggesting more resilience of the real Greenland ice sheet than shown in some ice sheet models. Here, we provide an independent assessment of the average LIG Greenland surface warming using ice core air isotopic composition (δ15N) and relationships between accumulation rate and temperature. The LIG surface temperature at the upstream NEEM deposition site without ice sheet altitude correction is estimated to be warmer by +7 to +11 °C (+8 °C being the most likely estimate according to constraints on past accumulation rate) compared to the pre-industrial period. This temperature estimate is consistent with the 7.5 ± 1.8 °C warming initially determined from NEEM water isotopes. Moreover, we show that under such warm temperatures, melting of snow probably led to a significant firn shrinking by ~ 15 m. Climate simulations performed with present day ice sheet topography lead to much smaller warming but larger amplitudes (up to 5 °C) can be obtained from changes in sea ice extent and ice sheet topography. Still, ice sheet simulations forced by 5 °C surface warming lead to large ice sheet decay that are not compatible with existing data. Our new, independent temperature constrain therefore reinforces the NEEM paradox

Ice-core data used for the construction of the Greenland Ice-Core Chronology 2005 and 2021 (GICC05 and GICC21)

We here describe, document, and make available a wide range of data sets used for annual-layer identification in ice cores from DYE-3, GRIP, NGRIP, NEEM, and EGRIP. The data stem from detailed measurements performed both on the main deep cores and shallow cores over more than 40 years using many different setups developed by research groups in several countries and comprise both discrete measurements from cut ice samples and continuous-flow analysis data. The data series were used for counting annual layers 60 000 years back in time during the construction of the Greenland Ice-Core Chronology 2005 (GICC05) and/or the revised GICC21, which currently only reaches 3800 years back. Now that the underlying data are made available (listed in Table 1) we also release the individual annual-layer positions of the GICC05 timescale which are based on these data sets. We hope that the release of the data sets will stimulate further studies of the past climate taking advantage of these highly resolved data series covering a large part of the interior of the Greenland ice sheet

A first chronology for the East Greenland Ice-core Project (EGRIP) over the Holocene and last glacial termination

This paper provides the first chronology for the deep ice core from the East Greenland Ice-core Project (EGRIP) over the Holocene and the late last glacial period. We rely mainly on volcanic events and common peak patterns recorded by dielectric profiling (DEP) and electrical conductivity measurement (ECM) for the synchronization between the EGRIP, North Greenland Eemian Ice Drilling (NEEM) and North Greenland Ice Core Project (NGRIP) ice cores in Greenland. We transfer the annual-layer-counted Greenland Ice Core Chronology 2005 (GICC05) from the NGRIP core to the EGRIP ice core by means of 381 match points, typically spaced less than 50 years apart. The NEEM ice core has previously been dated in a similar way and is only included to support the match-point identification. We name our EGRIP timescale GICC05-EGRIP-1. Over the uppermost 1383.84 m, we establish a depth–age relationship dating back to 14 967 years b2k (years before the year 2000 CE). Tephra horizons provide an independent validation of our match points. In addition, we compare the ratio of the annual layer thickness between ice cores in between the match points to assess our results in view of the different ice-flow patterns and accumulation regimes of the different periods and geographical regions. For the next years, this initial timescale will be the basis for climatic reconstructions from EGRIP high-resolution proxy data sets, e.g. stable water isotopes, chemical impurity or dust records