| 1. |
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| 2. |
- Bossini, D., et al.
(författare)
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Ultrafast Amplification and Nonlinear Magnetoelastic Coupling of Coherent Magnon Modes in an Antiferromagnet
- 2021
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 127:7
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Tidskriftsartikel (refereegranskat)abstract
- We investigate the role of domain walls in the ultrafast magnon dynamics of an antiferromagnetic NiO single crystal in a pump-probe experiment with variable pump photon energy. Analyzing the amplitude of the energy-dependent photoinduced ultrafast spin dynamics, we detect a yet unreported coupling between the material's characteristic terahertz- and gigahertz-magnon modes. We explain this unexpected coupling between two orthogonal eigenstates of the corresponding Hamiltonian by modeling the magnetoelastic interaction between spins in different domains. We find that such interaction, in the nonlinear regime, couples the two different magnon modes via the domain walls and it can be optically exploited via the exciton-magnon resonance.
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| 3. |
- Marinakis, Yannis, et al.
(författare)
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Multiobjective Particle Swarm Optimization for a Multicast Routing Problem
- 2014
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Ingår i: Examining Robustness and Vulnerability of Networked Systems. - : IOS Press. - 9781614993902 - 9781614993919 ; , s. 161-175
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Konferensbidrag (refereegranskat)abstract
- Routing has always been of immense importance in communication networks due to its impact on the network performance. The significance of scalable and adaptive routing has sky-rocked during the last decade as a consequence of the ever increasing demand for Internet and mobile communications. A routing algorithm selects one or more paths over which devices communicate with each other. In this paper, a new Multiobjective Particle Swarm Optimization (MOPSO) algorithm, with a new velocity equation, for the solution of the Multiobjective Multicast Routing Problem is proposed and tested. A number of variants of the proposed algorithm with global and local exploration abilities are presented and compared with each other. In order to estimate the quality of the methodology, experiments are conducted using classic Euclidean Traveling Salesman Problem benchmark instances taken from the TSP library, modified suitably for the selected problem. The preliminary results indicate the efficiency of the proposed method.
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| 4. |
- Gallou, Arnaud, et al.
(författare)
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Diurnal temperature range as a key predictor of plants' elevation ranges globally
- 2023
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Ingår i: Nature Communications. - 2041-1723. ; 14:1
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Tidskriftsartikel (refereegranskat)abstract
- A prominent hypothesis in ecology is that larger species ranges are found in more variable climates because species develop broader environmental tolerances, predicting a positive range size-temperature variability relationship. However, this overlooks the extreme temperatures that variable climates impose on species, with upper or lower thermal limits more likely to be exceeded. Accordingly, we propose the 'temperature range squeeze' hypothesis, predicting a negative range size-temperature variability relationship. We test these contrasting predictions by relating 88,000 elevation range sizes of vascular plants in 44 mountains to short- and long-term temperature variation. Consistent with our hypothesis, we find that species' range size is negatively correlated with diurnal temperature range. Accurate predictions of short-term temperature variation will become increasingly important for extinction risk assessment in the future. This study relates 88,000 elevation range sizes of vascular plants in 44 mountains to short-term and long-term temperature variation. The authors finding of decreasing elevation range sizes with greater diurnal temperature range supports a novel biodiversity hypothesis and indicates increased extinction risk of continental species.
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| 5. |
- Pierce, Paul
(författare)
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Why or Maybe Why Not Have an Alliance! - Case Studies of the Security Industry
- 2007
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Throughout the fall of 2006 and spring of 2007, more than 60 interviews were conducted on the topics of alliance and network building within the security industry. The interviews coupled with studies of academic research on the matter resulted in a number of pros and cons for alliance building as well as some general knowledge on the topic. The strongest facilitator for alliance building within the security industry has proven to be interpersonal relations as well as trust.
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| 6. |
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| 7. |
- Adriani, O., et al.
(författare)
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The gamma-400 space observatory : Status and perspectives
- 2014
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Ingår i: Proceedings of Science. - : Sissa Medialab Srl.
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Konferensbidrag (refereegranskat)abstract
- The present design of the new space observatory GAMMA-400 is presented in this paper. The instrument has been designed for the optimal detection of gamma rays in a broad energy range (from ∼100 MeV up to 3 TeV), with excellent angular and energy resolution. The observatory will also allow precise and high statistic studies of the electron component in the cosmic rays up to the multi TeV region, as well as protons and nuclei spectra up to the knee region. The GAMMA-400 observatory will allow to address a broad range of science topics, like search for signatures of dark matter, studies of Galactic and extragalactic gamma-ray sources, Galactic and extragalactic diffuse emission, gamma-ray bursts and charged cosmic rays acceleration and diffusion mechanism up to the knee.
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| 8. |
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| 9. |
- Boethius, Ulf, 1946-
(författare)
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Så gjorde vi i Danderyd
- 1986
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Ingår i: Kulturminnesvård. - Stockholm : Riksantikvarieämbetet. - 0346-9077. ; :3-4, s. 27-31
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 10. |
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| 11. |
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| 12. |
- de Jong, Johnny
(författare)
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How Forest Management affects Ecosystem Services, including Timber Production and Economic Return: Synergies and Trade-Offs
- 2012
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Ingår i: Ecology and Society. - 1708-3087. ; 17
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Tidskriftsartikel (refereegranskat)abstract
- Forest ecosystems deliver multiple goods and services and, traditionally, forest owners tend to have a high interest in goods in the form of merchantable wood. As a consequence, forest management often aims to increase timber production and economic returns through intervention into natural processes. However, forests provide further services, including carbon sequestration, water quantity and quality, and preservation of biodiversity. In order to develop and implement strategies for sustainable forest management, it is important to anticipate the long-term effects of different forest management alternatives on the ability of the forest to provide ecosystem goods and services. Management objectives might emphasize economic interests at the expense of other services. Very few attempts have been made to illustrate and evaluate quantitatively the relationship between forest goods and services. By use of virtual but realistic datasets, we quantified, for multiple services, the effects of five forest management alternatives that form an intensity gradient. Our virtual forest management units represented Central European forest ecosystems in the submontane vegetation zone under a humid-temperate climate with acidic soils. In this zone the European beech (Fagus sylvatica L.) is the dominant tree species. In order to assess the effects on ecosystem services, the untouched natural forest reserve served as a reference. Wherever possible, response functions were deduced to couple the various services via stand-level data to demonstrate trade-offs between the services. Management units comprised all development phases in the sense of a "normal forest". It was clearly illustrated that maximizing the rates of biomass production and carbon sequestration may conflict with protection of authentic biodiversity. Several silvicultural operations may, however, have positive effects on biodiversity and water protection without high costs. We also illustrated that water quality and maintenance of soil fertility may be affected either positively or negatively by several forest management operations. In contrast, water quantity was only minimally influenced by forest management. For the virtual forest in a humid climate, differences of 70 mm/yr in runoff were negligible. Under dry continental conditions, however, such differences may have important implications for groundwater formation.
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| 13. |
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| 14. |
- Guerriero, Gea, et al.
(författare)
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What Do We Really Know about Cellulose Biosynthesis in Higher Plants?
- 2010
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Ingår i: JOURNAL OF INTEGRATIVE PLANT BIOLOGY. - : Wiley. - 1672-9072 .- 1744-7909. ; 52:2, s. 161-175
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Forskningsöversikt (refereegranskat)abstract
- Cellulose biosynthesis is one of the most important biochemical processes in plant biology. Despite the considerable progress made during the last decade, numerous fundamental questions related to this key process in plant development are outstanding. Numerous models have been proposed through the years to explain the detailed molecular events of cellulose biosynthesis. Almost all models integrate solid experimental data with hypotheses on several of the steps involved in the process. Speculative models are most useful to stimulate further research investigations and bring new exciting ideas to the field. However, it is important to keep their hypothetical nature in mind and be aware of the risk that some undemonstrated hypotheses may progressively become admitted. In this review, we discuss the different steps required for cellulose formation and crystallization, and highlight the most important specific aspects that are supported by solid experimental data.
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| 15. |
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| 16. |
- Pazooki, David, 1958, et al.
(författare)
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Luminal nitric oxide in ileal reservoirs for continent cutaneous diversion or orthotopic bladder reconstruction.
- 2005
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Ingår i: Eur Urol. - : Elsevier BV. ; 48:1, s. 140-144
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: To measure mucosal inflammation as reflected in nitric oxide (NO) production in ileal reservoirs for the storage of urine and to correlate it with the growth of bacteria as well as CRP. Methods: Intraluminal gas NO concentrations were determined using the chemoluminescence technique in 25 patients with continent cutaneous ileal reservoirs (Kock pouch) and 12 patients with orthotopic bladders (hemi-Kock or T-pouch). NO concentrations were determined in both intestinal reservoir gas and silicon catheter balloon gas. Urinary culture and blood CRP determinations were performed. Results: NO concentrations in reservoir gas were higher than in silicon catheter balloons. Bacteriuria was associated with approximately 20 times higher NO concentrations than sterile urine. NO concentrations did not differ between continent cutaneous reservoirs or orthotopic bladders when due attention was paid to variance in the rate of bacteriuria. Elevated CRP was associated with higher NO concentrations. Bacteriuria with acinetobacter, enterococci and pseudomonas appeared to cause comparatively lower NO concentrations. The inflammatory response of reservoir walls to bacteriuria did not decrease with time. Conclusions: Urine in itself causes much less intestinal wall inflammation than bacteriuria, as reflected in NO production. High CRP values are associated with high NO concentrations. The inflammatory response varies with the bacterial specimens.
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| 17. |
- Bonfim, C., et al.
(författare)
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Long-term Survival, Organ Function, and Malignancy after Hematopoietic Stem Cell Transplantation for Fanconi Anemia
- 2016
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Ingår i: Biology of Blood and Marrow Transplantation. - : Elsevier BV. - 1083-8791. ; 22:7, s. 1257-1263
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Tidskriftsartikel (refereegranskat)abstract
- We report on long-term survival in 157 patients with Fanconi anemia (FA) who survived 2 years or longer after their first transplantation with a median follow-up of 9 years. Marrow failure (80%) was the most common indication for transplantation. There were 20 deaths beyond 2 years after transplantation, with 12 of the deaths occurring beyond 5 years after transplantation. Donor chimerism was available for 149 patients: 112 (76%) reported > 95% chimerism, 27 (18%) reported 90% to 95% chimerism, and 8 (5%) reported 20% to 89% donor chimerism. Two patients have < 20% donor chimerism. The 10- and 15-year probabilities of survival were 90% and 79%, respectively. Results of multivariate analysis showed higher mortality risks for transplantations before 2003 (hazard ratio [HR], 7.87; P =.001), chronic graft-versus-host disease (GVHD) (HR, 3.80; P =.004) and squamous cell carcinoma after transplantation (HR, 38.17; P <.0001). The predominant cause of late mortality was squamous cell carcinoma, with an incidence of 8% and 14% at 10 and 15 years after transplantation, respectively, and was more likely to occur in those with chronic GVHD. Other causes of late mortality included chronic GVHD, infection, graft failure, other cancers, and hemorrhage. Although most patients are disease free and functional long term, our data support aggressive surveillance for long periods to identify those at risk for late mortality.
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| 18. |
- Gray, F, et al.
(författare)
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Neuropathology of early HIV-1 infection
- 1996
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Ingår i: Brain pathology (Zurich, Switzerland). - : Wiley. - 1015-6305 .- 1750-3639. ; 6:1, s. 1-12
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Tidskriftsartikel (refereegranskat)
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| 19. |
- Guerriero, Marco, et al.
(författare)
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Bayesian Data Fusion for Distributed Target Detection in Sensor Networks
- 2010
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Ingår i: IEEE Transactions on Signal Processing. - 1941-0476 .- 1053-587X. ; 58:6, s. 3417-3421
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Tidskriftsartikel (refereegranskat)abstract
- In this correspondence, we study different approaches for Bayesian data fusion for distributed target detection in sensor networks. Due to communication and bandwidth constraints, we assume that each sensor can only transmit a local decision to the fusion center (FC), which is in charge to take the final decision about the presence of a target. The optimal Bayesian test statistic at the FC is derived in the case where both the number and locations of the sensors are known. On the other hand, if both the number and the locations of the sensors are unknown, the optimal Bayesian test statistic is computed based on the same observations that the Scan Statistic test utilizes. The performances of the different approaches are compared through simulation.
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| 20. |
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| 21. |
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| 22. |
- Perbeck, L
(författare)
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Untitled - Response
- 2006
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Ingår i: LYMPHOLOGY. - 0024-7766. ; 39:4, s. 201-202
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 23. |
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| 24. |
- Molstrom, Ida Marie, et al.
(författare)
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The prognosis of schizophrenia : A systematic review and meta-analysis with meta-regression of 20-year follow-up studies
- 2022
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Ingår i: Schizophrenia Research. - : Elsevier BV. - 0920-9964. ; 250, s. 152-163
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The aim was to examine the general outcome of schizophrenia after 20 years or more. Methods: Using the PRISMA guidelines, we conducted a systematic review and meta-analysis with meta-regression on long-term follow-up studies of schizophrenia up until April 21, 2021. We included prospective studies with at least 20 years of follow-up on patients with a diagnosis of schizophrenia, and the studies had to include face-to-face clinical evaluation. We examined outcome in three nested groups: ‘recovery’, ‘good or better’ (including also ‘recovery’), and ‘moderate or better’ (including also ‘recovery’ and ‘good or better’). We used random-effects meta-analysis and meta-regression to examine mean estimates and possible moderators. Results: We identified 1089 records, which were screened by two independent researchers. 14 prospective studies (1991 patients) published between 1978 and 2020 were found eligible. The studies used a range of different scales and definitions for outcome, and some used the same definitions for different outcomes. To compare outcome across studies, we designed and applied a unified template for outcome definitions and cutoffs, based on earlier studies' recommendations. Our meta-analysis found that 24.2 % had ‘recovered’ (n = 246, CI: 20.3–28.0 %), 35.5 % had a ‘good or better’ outcome (n = 766, CI: 26.0–45.0%), and 59.7% had ‘moderate or better’ outcome (n = 1139, CI: 49.3–70.1 %). Conclusions: The results contribute to debunk the myth that schizophrenia inevitably has a deteriorating course. Recovery is certainly possible. Schizophrenia remains, however, a severe and complex mental disorder, exhibiting a limited change in prognosis despite >100 years of research and efforts to improve treatment.
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| 25. |
- Reiss, Dennis, et al.
(författare)
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MORPHOLOGIC AND MORPHOMETRIC COMPARISION OF GULLIES ON SVALBARD AND MARS.
- 2009
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Ingår i: 40th Lunar and Planetary Science Conference. ; :2362
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The morphology of gullies on Mars indi-cates that they were formed by the action of water. How-ever, it is not clear what the dominant gully forming process is. On Earth, gullies might have formed by the processes of overland flow or debris flows, or a combination of both. In this work we compare the morphologic and morphometric observations and measurements (slopes, depth-width ratios and sinuosities) of Martian gullies with terrestrial analogs from Svalbard, Norway, in order to constrain the formation process (fluvial and/or debris flow).
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