112 research outputs found
Windtunnelmetingen aan een model van de vleugel van de Fokker F-27 "Friendship" in de lage snelheidstunnel van de onderafdeling Vliegtuigbouwkunde
No full textAerospace Engineerin
Obowiązek pamięci, obowiązek prawdy – Grzegorz Kwiatkowski Karl-Heinz M.
No full textThe focus of analysis in this article are poems from the collection by Grzegorz Kwiatkowski Karl-Heinz M., published in 2019. The poet returns here to the topics of extermination, death, and responsibility. The main characters in the poems, similar to those earlier collections, are not only the victims of Nazi crimes, but also the perpetrators. The author uses snatches of memories, referemces to documents, and invokes fragments of victims’ and perpetrators’ testimonies. What is interesting in these poetic representations is the form of the building of images, the use of abbreviations, and the compression of meanings. The manner of illustration in these poems evokes texts by Edgar Lee Masters, especially Spoon River Anthology (into Polish translated as Umarli ze Spoon River), as well as the book by Georges Didi-Huberman Images in Spite of All: Four Photographs from Auschwitz (Fr. Images malgré tout, 2004).Przedmiotem uwagi są wiersze z wydanego w 2019 r. zbioru Grzegorza Kwiatkowskiego Karl-‑Heinz M. Poeta powraca do tematów zagłady, śmierci, odpowiedzialności. Bohaterami wierszy, podobnie jak w poprzednich zbiorach, pozostają ofiary hitlerowskich zbrodni, ale także ich sprawcy. Autor wykorzystuje strzępy wspomnień, sięga po dokumenty, przywołuje fragmenty zeznań ofiar i zbrodniarzy. Interesujący w tych poetyckich przedstawieniach pozostaje sposób budowania obrazu, operowanie skrótem, kondensacja znaczeń. Utwory Kwiatkowskiego sposobem obrazowania nawiązują do tekstów Edgara Lee Mastersa, zwłaszcza tomu Umarli ze Spoon River (ang. Spoon River Anthology), a także książki Georges’a Didi-Hubermana Obrazy mimo wszystko (fr. Images malgré tout, 2004)
Improving the Success Rate in Statistics.
No full textFirst year statistics is one of the 'problem' subjects in many institutions. At the University of Queensland in the School of Economics it is a compulsory course with a large enrolment, offered in both first and second semesters, and also across two campuses in semester one. Even though the course content, lecturing staff, mode of delivery, tutorials, PASS and online assessment are essentially the same in the two semesters, the outcomes to 2007 have been different. At the St Lucia campus the failure rate in semester 2 was over 10% higher than in semester 1. This paper explores some possible explanations for the difference as well as assessing the success of some of the changes that were implemented from 2007 to 2009.
Asbestopluma (Asbestopluma) anisoplacochela Kelly & Vacelet, 2011, sp. nov.
No full textAsbestopluma (Asbestopluma) anisoplacochela sp. nov. (Fig. 4) Material examined. Holotype. NIWA 25835, NZOI Stn U 618, Three Kings Ridge (New Zealand EEZ), 33.115 °S, 173.302 °E, 1690 m, 12 Feb 1988, rock dredge. Type locality. Southern reaches of the Three Kings Ridge, northeast of Thee Kings Islands (New Zealand EEZ). Description. Several fragments of an erect, cylindrical sponge, 0.7-2 mm in diameter (Fig. 4 A). The larger fragment is 210 mm long, ending in a slightly enlarged part, bearing short swellings, most probably remains of lateral expansions laterally opposed. Color, light brown in the parts covered by the spicule feltwork, whitish in the axis and on the terminal swellings. No visible aquiferous system. Skeleton. Skeleton of the main axis is composed of longitudinally arranged mycalostyles, the swellings have a secondary axis of similar styles. Most parts of the main axis are lined by a dense feltwork of acanthotylostrongyles, including numerous shells of foraminifera and sand grains. Microscleres irregularly line the terminal part of the axis and the lateral swellings, and are rare on the basal part of the axis. Attachment base absent. Spicules. Megascleres (Fig. 4 B–D), mycalostyles (Fig. 4 B,C) of the axis of the stalk and lateral swellings, slightly curved, sometimes a little flexuous or fusiform, with a blunt point; 650– 1650 x 10–30 µm. Acanthotylostrongyles (Fig. 4 D) forming a feltwork around the main axis, slightly curved or flexuous, covered with numerous short, curved spines, head slightly inflated or with a faint annular swelling after the head, end abruptly blunt; 130– 310 x 2–3 µm. Microscleres (Fig. 4 E–K), anisoplacochelae (Fig. 4 E-H), rather numerous and of a large size, with two unequal ends. Large end with a central tooth enlarged in an oval plate, up to 25 µm wide, bearing curved spines regularly arranged along the edge of the inner surface. Smaller end with two small lateral alae and a large central tooth, strongly curved and spoon–shaped, with the edges irregularly crenulated (Fig. 4 H). Shaft straight and enlarged, with edges wrapping inwards to form a trough lined with curved spines on the inner surface facing the large end, irregularly crenulated on the rest of the inner edge near the base of the spicule. Immature spicules are smooth, without enlarged tooth; 180–220 µm total length, large tooth with a plate; 25 µm wide. Anisochelae (Fig. 4 K) moderately numerous, head with large alae attached to the shaft by their whole length and a large central tooth. Free shaft short, abruptly curved. Foot with two small alae, and an ovoid tooth ending in a short point, very regular; 10.5–10.8 µm total length. Sigmancistras (Fig. 4 J), numerous, twisted on 90 °, without notch; 27–32 µm x 2.5–3 µm. Etymology. Named for the presence of anisoplacochelae, a microsclere resembling the placochelae of the poecilosclerid family Guitarridae, but with unequal ends. Remarks. The fragments most probably belong to a single, broken specimen, which is poorly preserved and incomplete, but which likely had the pinnate morphology commonly found in various genera of carnivorous sponges. The spicule complement and the general organization of the new species are typical of Asbestopluma, but the species is well characterized by the presence of a remarkable new type of microsclere of very large size. This spicule, for which we propose the term ‘anisoplacochelae’, has a plate-like central tooth similar to that of the placochelae of Guitarridae and of Euchelipluma, but with two dissimilar ends, and thus clearly deriving from an anisochelae instead of an isochelae. The anisoplacochela has no equivalent in sponges with placochelae or related spicules (Uriz and Carballo, 2001). They could have been derived either from a placochelae, or represent a derivative of anisochelae homoplasic to the placochelae of Guitarridae and Euchelipluma. In our opinion, the second hypothesis, which does not imply a relationship with Guitarridae, is more likely at this stage. The presence of numerous foraminiferan shells is also remarkable. This character is shared with A. (A.) agglutinans Vacelet, 2006, which has remarkably similar small anisochelae and sigmancistras, but which differs in other spicule characters.Published as part of Kelly, Michelle & Vacelet, Jean, 2011, Three new remarkable carnivorous sponges (Porifera, Cladorhizidae) from deep New Zealand and Australian (Macquarie Island) waters, pp. 55-68 in Zootaxa 2976 on pages 60-62, DOI: 10.5281/zenodo.27826
Contemporary quantitative statistical methods for family psychology
No full textItem does not contain fulltextThis chapter discusses some contemporary statistical methods and their application in the field of family psychology. It focuses on longitudinal data analyses, because the author believes that family psychology benefits from longitudinal designs. The chapter outlines some key issues in operationalizing constructs - that is, measurement models, including latent factor modeling and measurement invariance. It turns to basic and advanced statistical methods for describing and explaining the associations between constructs. Basic statistical methods include moderation and mediation analyses, whereas advanced statistical methods include developmental cascade models, growth curve models, latent difference score models, and growth mixture models. The discussion of each method begins with a description of the statistical techniques, followed by a relevant study in the field of family psychology, used as an illustration of that particular method. The chapter concludes with a general discussion of statistical methods and future directions for their use in the field of family psychology
Reduction of Listeria monocytogenes on Various Food Contact Surfaces by Listeria Phage Suspension or Electrolyzed Oxidizing Water
No full textListeria monocytogenes often contaminates food processing areas, including food contact surfaces (FCS), thus leading to occurrence of re- and cross-contamination of finished products. Effective sanitizing agents are needed to reduce Listens contamination. The phage suspension (broad host-range phage, LP-124) and electrolyzed oxidizing water (EOW, pH 2.5 and oxidation-reduction potential, ORP 1080 mV) were evaluated against L. monocytogenes on three food contact surfaces (polyethylene - PE cutting board (n = 3), stainless steel SS spoon (n = 3) and SS sieve (n = 3), and cotton towel (n = 3) directly used on ready-to-eat squid sushi). The initial L. monocytogenes concentration of 4.3 to 5.0 log(10)CFU/100 cm(2) was reduced by 1.2 to 2.4 log units and 2.7 to 3.7 log units after treatments with the phage suspension and EOW, respectively. Counts below the detection limit (< 2 log(10)CFU/100 cm(2)) were observed on all surfaces treated with EOW for 5 min contact time, suggesting a high efficacy of EOW against L. monocytogenes. The highest CFU reduction was on SS spoon (2.4 log units) treated with Listens phage and on PE cutting board (3.7 log units) treated with EOW. Both treatments are of interest for applications to inactivate L. monocytogenes on different surfaces in the food processing facilities as well as retail operations.National Research Council of ThailandNational Research Council of Thailand (NRCT); Prince of Songkla University [AGR580226S]; TRF Distinguished Research Professor Grant; Scientific and Technological Research Council of Turkey (TUBITAK) of International Postdoctoral Research Scholarship Programme [2219]This study is financially supported by The National Research Council of Thailand and Prince of Songkla University (AGR580226S). The TRF Distinguished Research Professor Grant is also acknowledged. The author E. B. yen Yilmaz is financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK) of 2219-International Postdoctoral Research Scholarship Programme
The effective dose due to scattered radiation at patients during primary osteosynthesis; a multicenter prospective observational study
No full textObjectives: During osteosynthesis of a fracture patients are exposed to the primary radiation of an X-ray image and scattered (secondary) radiation. The primary objective was to measure the amount of scattered radiation at the thyroid, breast tissue, and gonads of patients undergoing primary osteosynthesis of acute fractures. The secondary objective was to calculate the effective dose caused by scattered radiation. Methods: In this multicenter prospective observational case series patients undergoing a primary osteosynthesis of an acute fracture of hand/wrist, shoulder, ankle, knee, or hip were included. Three dosimeters were attached to the patient at the level of the thyroid, breast and gonads. Scattered radiation doses were corrected for the average background radiation per hospital per day. Results: A total of 205 patients were included between March 6, 2017 and June 18, 2018; 49 (24%) had a hand/wrist fracture, 37 (18%) a shoulder fracture, 47 (23%) an ankle fracture, 35 (17%) a knee fracture, and 37 (18%) a hip fracture. In 32–39% of all patients undergoing primary osteosynthesis effective scattered doses was detected. The highest measured median effective dose was 60.43 µSv (P25–P75 33.84–100.76) at the gonads during hip osteosynthesis. Conclusions: The results of this study show that scattered radiation is detectable in a third of patients undergoing an osteosynthesis. However, both effective doses due to direct radiation and scattered radiation are low. Advances in knowledge: This is the first study that presents that no radiation protection for patients undergoing an osteosynthesis is necessary.Support Biomechanical Engineerin
Hybrid Feature Subset Selection for the Quantitative Assessment of Skills of Stroke Patients in the Activity of Daily Living Tasks
No full textStroke patients have a decreased ability in performing Activity of Daily Living (ADL) tasks such as in ‘drinking a glass of water’, ‘turning a key’, ‘picking up a spoon’, ‘lifting a bag’, ‘reaching a bottle’ and ‘lifting and carrying a bottle’. These tasks can be quantified by measuring forces and torques exerted on the objects. However, the resulting force and torque time series represent information at a very low level of abstraction and don’t inform clinicians what really distinguishes patients from normal controls in performing these tasks. We conduct an extensive quantitative analysis of these tasks and derive interesting features from the time signals that characterize the differences in behavior between patients and normal controls. We show that ‘drinking a glass’ and ‘turning a key’ are the most discriminative tasks; furthermore we show that the ability or disability to synchronize the thumb and the middle finger is one of the most important features.sponsorship: The first author was supported by the Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT Vlaanderen). The second author is funded by the Belgian Fund for Research -- Flanders (G.0248.03, G.0234.04), the Flemish Regional Ministry of Education (Belgium) (GOA 2000/11), the Belgian Science Policy (IUAP P5/04), and the European Commission (NEST-2003-012963, IST-2002-016276, IST-2004-027017)).
The third author is funded by the European Commission (IST-2002-507424).status: Publishe
Contemporary quantitative statistical methods for family psychology
No full textThis chapter discusses some contemporary statistical methods and their application in the field of family psychology. It focuses on longitudinal data analyses, because the author believes that family psychology benefits from longitudinal designs. The chapter outlines some key issues in operationalizing constructs - that is, measurement models, including latent factor modeling and measurement invariance. It turns to basic and advanced statistical methods for describing and explaining the associations between constructs. Basic statistical methods include moderation and mediation analyses, whereas advanced statistical methods include developmental cascade models, growth curve models, latent difference score models, and growth mixture models. The discussion of each method begins with a description of the statistical techniques, followed by a relevant study in the field of family psychology, used as an illustration of that particular method. The chapter concludes with a general discussion of statistical methods and future directions for their use in the field of family psychology
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