| 1. |
- Bombarda, F., et al.
(författare)
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Runaway electron beam control
- 2019
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Ingår i: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 1361-6587 .- 0741-3335. ; 61:1
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Tidskriftsartikel (refereegranskat)
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| 2. |
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Overview of the JET results
- 2015
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Ingår i: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 55:10
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Tidskriftsartikel (refereegranskat)
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| 3. |
- Zlabinger, Markus, et al.
(författare)
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Medical Entity Corpus with PICO Elements and Sentiment Analysis
- 2018
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Ingår i: Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018). - 9791095546009 ; , s. 292-296
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Konferensbidrag (refereegranskat)abstract
- In this paper, we present our process to establish a PICO and a sentiment annotated corpus of clinical trial publications. PICO stands for Population, Intervention, Comparison and Outcome - these four classes can be used for more advanced and specific search queries. For example, a physician can determine how well a drug works only in the subgroup of children. Additionally to the PICO extraction, we conducted a sentiment annotation, where the sentiment refers to whether the conclusion of a trial was positive, negative or neutral. We created both corpora with the help of medical experts and non-experts as annotators.
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| 4. |
- Abel, I, et al.
(författare)
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Overview of the JET results with the ITER-like wall
- 2013
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Ingår i: Nuclear Fusion. - : IOP Publishing. - 1741-4326 .- 0029-5515. ; 53:10, s. 104002-
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Tidskriftsartikel (refereegranskat)abstract
- Following the completion in May 2011 of the shutdown for the installation of the beryllium wall and the tungsten divertor, the first set of JET campaigns have addressed the investigation of the retention properties and the development of operational scenarios with the new plasma-facing materials. The large reduction in the carbon content (more than a factor ten) led to a much lower Z(eff) (1.2-1.4) during L- and H-mode plasmas, and radiation during the burn-through phase of the plasma initiation with the consequence that breakdown failures are almost absent. Gas balance experiments have shown that the fuel retention rate with the new wall is substantially reduced with respect to the C wall. The re-establishment of the baseline H-mode and hybrid scenarios compatible with the new wall has required an optimization of the control of metallic impurity sources and heat loads. Stable type-I ELMy H-mode regimes with H-98,H-y2 close to 1 and beta(N) similar to 1.6 have been achieved using gas injection. ELM frequency is a key factor for the control of the metallic impurity accumulation. Pedestal temperatures tend to be lower with the new wall, leading to reduced confinement, but nitrogen seeding restores high pedestal temperatures and confinement. Compared with the carbon wall, major disruptions with the new wall show a lower radiated power and a slower current quench. The higher heat loads on Be wall plasma-facing components due to lower radiation made the routine use of massive gas injection for disruption mitigation essential.
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| 5. |
- Ademuyiwa, Adesoji O., et al.
(författare)
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Determinants of morbidity and mortality following emergency abdominal surgery in children in low-income and middle-income countries
- 2016
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Ingår i: BMJ Global Health. - : BMJ Publishing Group Ltd. - 2059-7908. ; 1:4
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Tidskriftsartikel (refereegranskat)abstract
- Background: Child health is a key priority on the global health agenda, yet the provision of essential and emergency surgery in children is patchy in resource-poor regions. This study was aimed to determine the mortality risk for emergency abdominal paediatric surgery in low-income countries globally.Methods: Multicentre, international, prospective, cohort study. Self-selected surgical units performing emergency abdominal surgery submitted prespecified data for consecutive children aged <16 years during a 2-week period between July and December 2014. The United Nation's Human Development Index (HDI) was used to stratify countries. The main outcome measure was 30-day postoperative mortality, analysed by multilevel logistic regression.Results: This study included 1409 patients from 253 centres in 43 countries; 282 children were under 2 years of age. Among them, 265 (18.8%) were from low-HDI, 450 (31.9%) from middle-HDI and 694 (49.3%) from high-HDI countries. The most common operations performed were appendectomy, small bowel resection, pyloromyotomy and correction of intussusception. After adjustment for patient and hospital risk factors, child mortality at 30 days was significantly higher in low-HDI (adjusted OR 7.14 (95% CI 2.52 to 20.23), p<0.001) and middle-HDI (4.42 (1.44 to 13.56), p=0.009) countries compared with high-HDI countries, translating to 40 excess deaths per 1000 procedures performed.Conclusions: Adjusted mortality in children following emergency abdominal surgery may be as high as 7 times greater in low-HDI and middle-HDI countries compared with high-HDI countries. Effective provision of emergency essential surgery should be a key priority for global child health agendas.
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| 6. |
- Aidemark, Mari, et al.
(författare)
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Regulation of callose synthase activity in situ in alamethicin-permeabilized Arabidopsis and tobacco suspension cells
- 2009
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Ingår i: BMC Plant Biology. - : Springer Science and Business Media LLC. - 1471-2229. ; 9
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Tidskriftsartikel (refereegranskat)abstract
- Background: The cell wall component callose is mainly synthesized at certain developmental stages and after wounding or pathogen attack. Callose synthases are membrane-bound enzymes that have been relatively well characterized in vitro using isolated membrane fractions or purified enzyme. However, little is known about their functional properties in situ, under conditions when the cell wall is intact. To allow in situ investigations of the regulation of callose synthesis, cell suspensions of Arabidopsis thaliana (Col-0), and tobacco (BY-2), were permeabilized with the channel-forming peptide alamethicin. Results: Nucleic acid-binding dyes and marker enzymes demonstrated alamethicin permeabilization of plasma membrane, mitochondria and plastids, also allowing callose synthase measurements. In the presence of alamethicin, Ca2+ addition was required for callose synthase activity, and the activity was further stimulated by Mg2+ Cells pretreated with oryzalin to destabilize the microtubules prior to alamethicin permeabilization showed significantly lower callose synthase activity as compared to non-treated cells. As judged by aniline blue staining, the callose formed was deposited both at the cell walls joining adjacent cells and at discrete punctate locations earlier described as half plasmodesmata on the outer walls. This pattern was unaffected by oryzalin pretreatment, showing a quantitative rather than a qualitative effect of polymerized tubulin on callose synthase activity. No callose was deposited unless alamethicin, Ca2+ and UDP-glucose were present. Tubulin and callose synthase were furthermore part of the same plasma membrane protein complex, as judged by two-dimensional blue native SDS-PAGE. Conclusion: Alamethicin permeabilization allowed determination of callose synthase regulation and tubulin interaction in the natural crowded cellular environment and under conditions where contacts between the cell wall, the plasma membrane and cytoskeletal macromolecules remained. The results also suggest that alamethicin permeabilization induces a defense response mimicking the natural physical separation of cells (for example when intercellulars are formed), during which plasmodesmata are transiently left open.
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| 7. |
- Allan, Dan, et al.
(författare)
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Time-optimal quantum transformations with bounded bandwidth
- 2021
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Ingår i: Quantum. - : Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften. - 2521-327X. ; 5, s. 1-19
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we derive sharp lower bounds, also known as quantum speed limits, for the time it takes to transform a quantum system into a state such that an observable assumes its lowest average value. We assume that the system is initially in an incoherent state relative to the observable and that the state evolves according to a von Neumann equation with a Hamiltonian whose bandwidth is uniformly bounded. The transformation time depends intricately on the observable's and the initial state's eigenvalue spectrum and the relative constellation of the associated eigenspaces. The problem of finding quantum speed limits consequently divides into different cases requiring different strategies. We derive quantum speed limits in a large number of cases, and we simultaneously develop a method to break down complex cases into manageable ones. The derivations involve both combinatorial and differential geometric techniques. We also study multipartite systems and show that allowing correlations between the parts can speed up the transformation time. In a final section, we use the quantum speed limits to obtain upper bounds on the power with which energy can be extracted from quantum batteries.
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| 8. |
- Andersson, Allan, et al.
(författare)
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Effects of Mild Temperature Stress on Grain Quality and Root and Straw Nitrogen Concentration in Malting Barley Cultivars
- 2011
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Ingår i: Journal of Agronomy and Crop Science. - 0931-2250. ; 197, s. 466-476
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Tidskriftsartikel (refereegranskat)abstract
- It is a challenge to obtain the appropriate protein concentration in cereals for the intended end-use. This study examined ambient temperature effects on two spring malting barley cultivars (Henley and Tipple) grown in soil or in solution culture with controlled nitrogen supply in daylight chambers with low temperature (day 18 degrees C, night 12 degrees C), and high temperature (23 degrees C/17 degrees C) to/after anthesis. In soil-grown plants, high temperature to anthesis resulted in higher grain nitrogen amount (GNA), grain nitrogen concentration (GNC) and straw nitrogen concentration (SNC). In plants grown in solution, high temperature to anthesis resulted in lower GNA and higher GNC. A temperature rise of 1 degrees C during the growing period in solution cultivation increased GNC, root nitrogen concentration (RNC) and SNC, by 1.20, 1.35 and 0.33 mg g(-1), respectively. In solution culture, GNC was positively correlated with RNC and SNC (P < 0.01). Cv. Henley had higher GNC but lower SNC than cv. Tipple. Cv. Henley was more stable in grain size and cv. Tipple in GNC. The results showed that temperature has a direct effect on GNC. Accounting for temperature fluctuations up to the latest possible nitrogen fertilisation occasion can therefore help when deciding appropriate nitrogen supply for intended end-use.
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| 9. |
- Andersson, Allan
(författare)
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Fröodling av rajsvingel och rörsvingel : tillväxtreglering, kvävegödsling och skördeteknik
- 2010
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Ingår i: LTJ-fakultetens faktablad.
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Annan publikation (populärvet., debatt m.m.)abstract
- Rajsvingel och rörsvingel är arter som har fått stor användning i vallfröblandningar för slåttervallar. Rajsvingel är en korsning mellan rajgräs och svingel som sedan 1990-talet har fått ökad odling i stora delar av Europa. Sorten Hykor är en korsning mellan rörsvingel och italienskt rajgräs och är den mest utbredda sorten av rajsvingel i Sverige för tillfället. Rörsvingel är en gammal foderväxt som har börjat odlas igen i Sverige de senaste åren. År 2009 odlades endast sorten Swaj i Sverige. Raj- och rörsvingel förväntas ersätta ängssvingel i vallfröblandningar i Sverige beroende på arternas höga avkastning och återväxtförmåga i slåttervallar. Kunskapen om vallfröodling av raj- och rörsvingel i Sverige ökar och bygger på tidigare erfarenheter men behöver utvecklas ytterligare. I detta faktablad redovisas försök från 2008 och 2009 om vallfröodling av rajsvingel och rörsvingel. Tillväxtreglering, kvävegödsling i kombination med tillväxtreglering och skördeteknik undersöktes. En tillväxtreglering med Moddus eller Moddus + CCC på våren under stråskjutningen kan öka avkastningen. Rekommendationen är att genomföra en tidig tillväxtreglering i strå- skjutningens början i en gröda med god tillväxt. Om grödan är stressad på grund torka, kyla med mera kan man avvakta med behandlingen till senast i begynnande axgång. Kvävegödsling på våren ökar avkastningen och lämplig giva beror på odlad sort. Kvävegödsling i kombination med tillväxtreglering ökaravkastningen ytterligare. Försöken med skördeteknikvisar att rajsvingel bör strängläggas med en rapshuggare medan skördetekniken inte har lika stor betydelse i rörsvingel
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| 10. |
- Andersson, Allan
(författare)
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Höst- och vårputsning i frövallar av timotej och ängssvingel
- 2011
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Ingår i: LTJ-fakultetens faktablad.
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Annan publikation (populärvet., debatt m.m.)abstract
- Två nya svenska försök visar att frövallar av timotej och ängssvingel kan putsas på våren innan tillväxtstart i stället för som vanligt i början av oktober. Speciellt i ängssvingel verkar höstputsningen kunna göra mera skada än nytta. Liknande resultat har erhållits i norska försök. För att säkerställa slutsatsen för svenska förhållanden behövs dock flera försök genomföras.
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