Charmed Hadrons from Strangeness-rich QGP

The yields of charmed hadrons emitted by strangeness rich QGP are evaluated within chemical non-equilibrium statistical hadronization model, conserving strangeness, charm, and entropy yields at hadronization.Comment: 6 pages, 2 figures SQM 2006; the same as J. Phys. G in pres

PAH emission in the proplyd HST10: what is the mechanism behind photoevaporation?

Proplyds are photodissociation region (PDR)-like cometary cocoons around young stars which are thought to originate through photo-evaporation of the central protoplanetary disk by external UV radiation from the nearby OB stars. This letter presents spatially resolved mid-infrared imaging and spectroscopy of the proplyd HST10 obtained with the VLT/VISIR instrument. These observations allow us to detect Polycyclic Aromatic Hydrocarbons (PAH) emission in the proplyd photodissociation region and to study the general properties of PAHs in proplyds for the first time. We find that PAHs in HST10 are mostly neutral and at least 50 times less abundant than typical values found for the diffuse ISM or the nearby Orion Bar. With such a low PAH abundance, photoelectric heating is significantly reduced. If this low abundance pertains also to the original disk material, gas heating rates could be too low to efficiently drive photoevaporation unless other processes can be identified. Alternatively, the model behind the formation of proplyds as evaporating disks may have to be revised.Comment: 5 pages, 3 figures, 1 tabl

Crystalline phases in chiral ferromagnets: Destabilization of helical order

In chiral ferromagnets, weak spin-orbit interactions twist the ferromagnetic order into spirals, leading to helical order. We investigate an extended Ginzburg-Landau theory of such systems where the helical order is destabilized in favor of crystalline phases. These crystalline phases are based on periodic arrangements of double-twist cylinders and are strongly reminiscent of blue phases in liquid crystals. We discuss the relevance of such blue phases for the phase diagram of the chiral ferromagnet MnSi.Comment: 6 pages, 5 figures (published version

Adapting to Climate Change in Reindeer Herding: The Nation-State as Problem and Solution.

This paper discusses the role of nation-states and their systems of gover- nance as sources of barriers and solutions to adaptation to climate change from the point of view of Saami reindeer herders. The Saami, inhabiting the northernmost areas of Fennoscandia, is one of more than twenty ethnic groups in the circumpolar Arctic that base their traditional living on reindeer herding. Climate change is likely to affect the Saami regions severely, with winter temperatures predicted to increase by up to 7 centigrade. We argue that the pastoral practices of the Saami herders are inherently better suited to handle huge natural variation in climatic con- ditions than most other cultures. Indeed, the core of their pastoral practices and herding knowledge is skillful adaptation to unusually frequent and rapid change and variability. This paper argues that the key to handle permanent changes successfully is that herders themselves have sufficient degrees of freedom to act. Considering the similarities in herding practices in the fours nation-states between which Saami culture is now divided . Norway, Sweden, Finland, and Russia . the systems of governance are surprisingly different. Indeed, the very definition of what is required to be defined as an ethnic Saami is very different in the three Nordic countries. We argue that timely adjust- ments modifying the structures of governance will be key to the survival of the Saami reindeer herding culture. Since the differences in governance regimes . and the need to change national governance structures . are so central to our argument, we spend some time tracing the origins of these systems.

Iodine intake and status in Iceland through a period of 60 years

Iodine deficiency is considered to be one of the most common nutrition disorders in the world and the world's greatest single cause of preventable brain damage. Despite a worldwide application of successful iodine supplementation programs over the last four decades, iodine deficiency remains a major public health problem throughout the world. All European countries except Iceland have experienced this health and socioeconomic threat to a greater or lesser extent. The fact that mild to severe iodine deficiency persists in many European countries may have important public health consequences, including impaired intellectual development of infants and children. Iceland has in the past been known for its high iodine status, based on results from studies of iodine status from 1939, 1988, and 1998 suggested to be due to high fish consumption. Fish together with milk and other dairy products are the main sources of iodine in the Icelandic diet, but iodized salt is not commonly used. In recent years fish and dairy intake has decreased, especially among young people. In this paper, historical data on iodine status and iodine intake in Iceland is reviewed and the need for further studies as well as possible need for public health actions evaluated

DEVELOPMENT OF ADULT LEARNERS’ 21ST CENTURY SKILLS IN GREENLAND: FIELD WORK ANALYSIS

The expansion of adult education has been presented as an effective strategy to solve the issues in adult employment. The aim of the present research is to analyse the field work carried out in Nuuk (Greenland) on the development of adult learners’ 21st century skills in Greenland underpinning the elaboration of implications for adult education in Greenland. The methods of the present research comprise both theoretical and empirical methods. The empirical study was based on fieldwork. Two on-site visits in Nuuk between the 8-12th August 2022 were carried out. Observation and participant observation were implemented. A semi-structured interview with two interviewees was conducted. The literature review allows for a conclusion that adult education in Greenland is mentioned neither in Greenland educational policy documents or scientific publications. Despite that, the analysis of the implemented fieldwork allows drawing a conclusion that adult education has been established on a municipal level like the centre Majoriaq, and on a non-governmental level like Kofoeds Skole. Both theoretical and empirical analysis contribute to the conclusion that adult learners’ 21st century skills in Greenland are being developed. However, these skills would need more joint work from all the adult education stakeholders.

Langerhans Cells as Macrophages in Skin and Lymhphoid Organs

Properties of epidermal Langerhans cell were compared with those of a number of other dendritic cells in lymphoid organs and of mononuclear phagocytes. Among the dendritic “reticulum” cells included were indetenninate dendritic cells from the epidermis, inter-digitating “reticulum” cells from T-dependent areas of lymphoid tissue and thymus, follicular dendritic cells of Nossal, and the dendritic cells described by Steinman and Cohn. Luterdigitating cells with typical Birbeck granules, in the thymus and in the paracortices of lymph nodes, which are morphologically indistinguishable from Langerhans cells and indeterminate dendritic cells in the epidermis, appear to belong to the same system and possibly represent a subpopulation of “macrophages.” On the basis of their similarity to these other dendritic cells, we believe Langerhans cells may function in antigen presentation, lymphokine production, provision of a microenvironment for T lymphocytes, and prostaglandin secretion

Fates and Travel Times of Denmark Strait Overflow Water in the Irminger Basin*

The Denmark Strait Overflow (DSO) supplies about one-third of the North Atlantic Deep Water and is critical to global thermohaline circulation. Knowledge of the pathways of DSO through the Irminger Basin and its transformation there is still incomplete, however. The authors deploy over 10 000 Lagrangian particles at the Denmark Strait in a high-resolution ocean model to study these issues. First, the particle trajectories show that the mean position and potential density of dense waters cascading over the Denmark Strait sill evolve consistently with hydrographic observations. These sill particles transit the Irminger Basin to the Spill Jet section (65.25°N) in 5–7 days and to the Angmagssalik section (63.5°N) in 2–3 weeks. Second, the dense water pathways on the continental shelf are consistent with observations and particles released on the shelf in the strait constitute a significant fraction of the dense water particles recorded at the Angmagssalik section within 60 days (~25%). Some particles circulate on the shelf for several weeks before they spill off the shelf break and join the overflow from the sill. Third, there are two places where the water density following particle trajectories decreases rapidly due to intense mixing: to the southwest of the sill and southwest of the Kangerdlugssuaq Trough on the continental slope. After transformation in these places, the overflow particles exhibit a wide range of densities

Age-related cognitive effects of the COVID-19 pandemic restrictions and associated mental health changes in Germans

Restrictive means to reduce the spread of the COVID-19 pandemic have not only imposed broad challenges on mental health but might also affect cognitive health. Here we asked how restriction-related changes influence cognitive performance and how age, perceived loneliness, depressiveness and affectedness by restrictions contribute to these effects. 51 Germans completed three assessments of an online based study during the first lockdown in Germany (April 2020), a month later, and during the beginning of the second lockdown (November 2020). Participants completed nine online cognitive tasks of the MyBrainTraining and online questionnaires about their perceived strain and impact on lifestyle factors by the situation (affectedness), perceived loneliness, depressiveness as well as subjective cognitive performance. The results suggested a possible negative impact of depressiveness and affectedness on objective cognitive performance within the course of the lockdown. The younger the participants, the more pronounced these effects were. Loneliness and depressiveness moreover contributed to a worse evaluation of subjective cognition. In addition, especially younger individuals reported increased distress. As important educational and social input has partly been scarce during this pandemic and mental health problems have increased, future research should also assess cognitive long-term consequences