107 research outputs found
Arctic synoptic activity associated with sea ice variability using self-organizing maps
No full textRelationships between synoptic activity and sea ice variability in the Arctic are studied using self-organizing maps (SOMs) to categorize observed weather patterns over the 1979-2010 period. The European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-interim, or ERAI) provides the daily sea level pressures from which the SOMs are computed. Time series of frequencies and durations of synoptic weather patterns are correlated with two sea ice metrics, Fram Strait ice outflow and year-to-year changes in September pan-Arctic sea ice extent. When compared to teleconnection indices commonly associated with sea ice variability, the Arctic Oscillation (AO), North Atlantic Oscillation (NAO), and Arctic Dipole (AD), some SOM patterns correlate more strongly with sea ice metrics. For example, Beaufort High synoptic patterns are increasing in frequency in spring and summer and their spring frequencies are associated with ice loss. Icelandic Low patterns show opposing influences on sea ice from wind-forcing and thermal advection. The phase lags between the SOM occurrences and sea ice variability offer the potential for augmentation of other approaches to seasonal sea ice prediction. The ERA-interim SOM analysis is used to quantify how the Community Climate System Model, Version 4 (CCSM4) captures synoptic activity in the twentieth and twenty-first centuries. The model undersimulates patterns important for ice loss, such as broad high pressures over the continents and ice cover, and simulates strong storm track features at a higher-than-observed frequency. Large-scale teleconnection patterns, such as the AO and AD, are reasonably captured but there are spatial shifts in centers of action (which are associated with ice motion biases) and enhanced interannual variability relative to the observations. Relationships between synoptic activity and year-to-year changes in sea ice extent are not as prominent in the 20th century model experiment and further weaken in the 21st century. Accounting for seasonal SLP biases in the model enhances SOM frequency-ice correlations, suggesting that the model captures closer-to-observed atmosphere-ice linkages when SLPs are reasonably simulated. Strong low pressures over the Arctic predominate over the ice-free central Arctic during summer and fall in the 21st century.Item withdrawn by Mark Zulauf ([email protected]) on 2014-04-24T13:49:43Z
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University of Illinois Theses & Dissertations (ID: 1)
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Heterogenella bigibbata Mamaev & Berest 1991
No full textHeterogenella bigibbata Mamaev & Berest, 1991 Fig. 8 A This species, previously known only from the type locality in Ukraine (Mamaev & Berest 1991), is here reported from two sites in south and central Sweden. Swedish specimens of H. bigibbata are in line with the redescription of this species by Jaschhof (1998) as well as with an unpublished drawing of the genitalia of the male holotype, which the senior author made in 2007. Heterogenella biggibata is distinguished from the congeneric species by short, almost circular gonostyli (↓); the ninth tergite lacking a T-shaped sclerotization (as is present in H. linearis Yukawa); and the ventral emargination of gonocoxae bordered by small, densely setulose swellings (↓). Material. 3 males (CEC 33–35), Sweden, Skåne, Simrishamn, Stenshuvud National Park, 16 June– 31 July 2009, M. & C. Jaschhof; 9 males (CEC 24–32), Uppland, Uppsala, Fiby Nature Reserve, 23 June– 28 July 2009, 9 June– 23 July 2010, M. & C. Jaschhof.Published as part of Jaschhof, Mathias & Jaschhof, Catrin, 2015, New species and new distribution records of Lestremiinae, Micromyinae and Porricondylinae (Diptera: Cecidomyiidae) in Sweden, pp. 159-174 in Zootaxa 3973 (1) on page 171, DOI: 10.11646/zootaxa.3973.1.6, http://zenodo.org/record/23421
Mokita style illustration symposium
No full textFor some it’s a creative straitjacket, for others the Holy Grail – whether it be mimicry or origination, style in illustration can mean polar opposites, and is the subject of the third MOKITA conference at Somerset House. Planned in spring 2014, the subject has been explored in the current issue ofVaroommagazine and discussed at September’s Crowd Talks at Hoxton Gallery. This is an opportunity to further debate and define the term. With an invited panel of speakers and guest chair, both sides of the case will made pitching style versus content, imitation versus sincerity, and semiotics versus aesthetics. Confirmed speakers include George Hardie, Lawrence Zeegen, Luise Vormittag, Catrin Morgan, John O’Reilly, and Crowd Talks. Both the divergent and emergent aspects of 21st-century illustration will be examined in this latest instalment, intended to make a fit-for-purpose architecture for the subject. Purposely not aligned to any single education provider,MOKITAwas founded in 2010 to focus debate on the more uncharted and contentious aspects of illustration as a subject and practice. Its founders are Darryl Clifton (Camberwell College of Arts UAL), Geoff Grandfield (Kingston University London), and Roderick Mills (University of Brighton)
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No full textTh1 and Th2 chemokines, vaccine induced 1 immunity and allergic disease in infants after maternal ω-3 fatty acid supplementation during pregnancy and lactatio
The silicon carbide industry in the spotlight – Energy Intensive Industries (EIIs) and the sustainability transition
No full textTransitioning of energy intensive industries (EIIs) towards more sustainability forms an important building block in achieving the Paris climate goals. Silicon carbide (SiC) production is such an EII, though it has not yet received much attention in systemic research. This thesis attempts to fill this gap by studying how SiC flows through the global economy. The objectives are to describe the SiC supply chain, quantify its flows and analyse the supply chain’s resilience. Findings: The global SiC production capacity constitutes 1 000 000 t per year. With 55.34% the Asia Pacific region is the biggest producer, followed by Europe with 32.7%, rest of world with 7.96% and North America with 4%. In order of quantity, abrasives, metallurgy, refractories, technical ceramics, other industrial uses, semiconductors and jewellery are the main applications of SiC. Around 5% of the material is recycled (USGS, 2021). High energy requirements in SiC production, as well as strict emission regulations are identified as the main supply risks. Substitution, use reduction, recycling and stockpiling can only minimally absorb supply disturbances at their current state. However, recycling is currently a popular topic in the industry and under development. In the mid-term, recycling activities might become a way to increase supply chain resilience. Another strategy that could lower pressure on the supply chain is using SiC production to balance the energy grid. That is, to produce when there is an oversupply of energy and to halt production when there is a shortcoming. Implications: This thesis shows that sustainability efforts in the SiC industry are not only environmentally desirable, but might also add to its supply chain’s resilience. The case of SiC shows that small EIIs that have so far not received much attention can offer high returns in terms of knowledge gained.Industrial Ecolog
The Vulnerable Spectator
No full textAdapted from the Lissa Evans novel Their Finest Hour and a Half, Their Finest (Lone Scherfig, 2016) is a fictional film based loosely on historical figures and circumstances, as it tells the story of the production of a feature film by the UK Ministry of Information (MOI) in 1940. What, Their Finest quietly asks, is real? What is fake? And what does it matter, if you are at the movies? Joy is real. Tears are real. And other things, too: the tea I sip, the arm of my companion next to me, the chattering women in the row below, the sighing man who has come to the movies alone. The light is real. The darkness, too. Hastie thinks through the implications of a female author of the original monograph, the female director of the current film, and the fictional composite female character Catrin Cole, the screenwriter in the film. The whole of Catrin Cole did and didn't exist before Their Finest. “Catrin Cole” is not a historical figure, hidden or otherwise. She is a composite of fact and fiction, the pieces stitched together to make a whole person. As asserted by producer Stephen Woolley, who initiated the project, Their Finest drew upon the lives of many women writers for the Film Division of the MOI, particularly that of Diana Morgan, the one woman in the Ealing Studios writers’ room.</jats:p
Comparison of creep deformation rates during load and strain controlled multi-step creep ageing tests on AA7050
No full textAprionus lindgrenae Jaschhof & Jaschhof, 2015, sp. n.
No full textAprionus lindgrenae sp. n. (Fig. 2 B) Remark. This new species has long been known to the senior author from specimens collected in Germany, none of which is in a condition adequate for description. Diagnosis. Aprionus lindgrenae is another new species belonging to the smirnovi group. The spineless gonostyli are typically directed dorsally, with their apical portions tapered and densely covered with long microtrichia (↓). The tegmen is fingerless as is characteristic in the smirnovi group; its apical portion is slightly bent dorsally and sculpted with folds (↓). As an unusual feature in Aprionus, the subanal plate of A. lindgrenae bears 1–2 pairs of setae (↓). Other male characters. Body size 1.2 mm. Head. Head capsule perfectly globular. Occiput unusually sparsely setose. Postfrons asetose. Eye bridge 3–4 ommatidia long. Postocular bristles 3–5, in 1 sparse row. Neck of fourth flagellomere clearly longer than node; node with 1 complete and 2 incomplete crenulate whorls of sensory hairs, 2 very thick hair-shaped translucent sensilla distally. Maxillary palpus varying in length, 3 - segmented; first segment swollen, with hair-shaped translucent sensilla. Wing. Apical portion of R 1 2–3 times as long as Rs. Legs. Claws thin, evenly, slightly curved, with 2–3 tiny teeth. Terminalia (Fig. 2 B). Ninth tergite long, with concave, slightly reinforced anterior margin. Gonocoxa rounded ventroapically; posterior portion of gonocoxal apodeme unusually curved at base (↓). Tegmen widest at mid-length. Subanal plate weakly sclerotized, indistinctly bilobed. Etymology. This species is named after the recently deceased Erika Lindgren, Vassmolösa, Småland. With Erika gone, all of us have lost a pleasant person and SMTP has lost a knowledgable, dedicated associate. Types. Holotype. Male (CEC 79), Sweden, Bohuslän, Stenungsund, Kolhättan, Hällsberget, broadleaf deciduous forest, 14 April– 25 May 2004, Malaise trap, Swedish Malaise Trap Project (trap 31, collecting event 515) (in NHRS). Paratypes. 2 males (CEC 80–81), same data as the holotype; male, Bohuslän, Tanum, Hamburgsund, Stora Snixholmen, coastal rock, 29 Aug.– 13 Sep. 2003, Malaise trap, SMTP (trap 32, collecting event 519); 2 males (CEC 83–84), Sweden, Småland, Nybro, Bäckebo, Grytsjön Nature Reserve, hay meadow at forest edge, 13–24 Aug. 2007, Malaise trap, SMTP (trap 1001, collecting event 1355). Other specimens studied. Male (A 7602), Germany, Schleswig-Holstein, Hauke-Haien-Koog 32 km NW Husum, coastal dike, 1971, yellow pan trap, H. Meyer; 2 males (A 7603–7604), Mecklenburg-Vorpommern, Karbow 15 km SE Greifswald, broadleaf deciduous forest, 15 Aug. 1993, sweepnet and aspirator, M. Jaschhof; male (A 7605), Thüringen, Leutra S Jena, beech forest, 27 June 1993, sweepnet, M. Jaschhof.Published as part of Jaschhof, Mathias & Jaschhof, Catrin, 2015, New species and new distribution records of Lestremiinae, Micromyinae and Porricondylinae (Diptera: Cecidomyiidae) in Sweden, pp. 159-174 in Zootaxa 3973 (1) on pages 162-164, DOI: 10.11646/zootaxa.3973.1.6, http://zenodo.org/record/23421
Inter-generational work tackling loneliness: Old and alone: not just an isolated incident
No full text4.50 minute talk given and recorded for YouTube.
Author also helped with planning the event
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