36,735 research outputs found
Woud: Trek je even terug in je concentratiebubbel
No full textHet was zo’n zonnige lentedag; heerlijk om lekker buiten te zijn. Ik zat binnen, in een vergadering – met de nodige moeite om mijn aandacht erbij te houden. Liever keek ik door het raam naar kersenbloesems. Afgeleid raken, wegdromen ofjuist onrustig zijn en niet stil kunnen zitten. Herkenbaar? Vast wel; iedereen heeft wel eens moeite om zich te concentreren. Maar voor sommige kinderen is dit een dagelijkse worsteling. Hoe ga je daar op een goede manier mee om in eenklaslokaal, een omgeving met constante prikkels en afleiding? Ontwerper Shion Ito ontwierp een mini-bos waar je je even in kunt terugtrekken om je rust terug te vindenGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Human-Centered DesignDesign Aesthetic
Londen laat zien: verstedelijking kun je privaat bekostigen
No full textSimon van Zoest en Tom Daamen doen bij de leerstoel Gebiedsontwikkeling onderzoek naar de financiering en bekostiging van grootstedelijk openbaar vervoer. Zij kijken daarbij voorbij de instrumenten en verdiept zich in de motieven en succesfactoren achter de invoer van alternatieve bekostiging. Zo maakt Londen duidelijk dat een private bijdrage aan ov-investeringen mogelijk én wenselijk kan zijnPractice Chair Urban Area DevelopmentUrban Development Managemen
Varijabilnost morfoloških karakteristika kopljaste nematode Longidorus euonymus Mali et Hooper, 1974 (Nematoda: Longidoridae)
No full textMorphological characters of Longidorus euonymus Mali et Hooper, 1974 from six localities: Vrtogos, Loznica, Kanjiza, Knjazevac, Nis and Subotica were studied. Morphological characters variability both qualitative and quantitative are in the limits of intraspecies tolerance. Juveniles present as four developmental stages differs morphometricaly rather than morphologicaly. J1 tail is more narrow and conoid than others but without special differentiations. Body length, odontostyle and replacement odontostyle values are increasing progressively by stages. There are no morphological and anatomical differences, except morphometrical differences between two specimens of males. Male discovered in Loznica is longer but more narrow than male from Italian population, it has longer and wider tale, greater head diameter and shorter odontostyle and spicules. Female qualitative morphological characters that showed variability are head and tail shape and position of vulva. Odontostyle length as well as head diameter showed minimum variability. Maximum variability was shown by tail length and indices c and c'. However, all morphological characters of specimens from Serbia are in general agreement with original description given by Mali et Hooper from 1974.Proučavane su morfološke karakteristike Longidorus euonymus Mali et Hooper, 1974 sa šest lokaliteta: Vrtogoš, Loznica, Kanjiža, Knjaževac, Niš i Subotica. Varijabilnost morfoloških karakteristika i kvalitativnih i kvantitativnih je u granicama intraspecijske tolerancije. Larve su predstavljene kroz četiri juvenilna stupnja koji se međusobno više razlikuju morfometrijski nego morfološki. Rep kod L1 je uži i više konusan od ostalih ali bez nekih posebnih diferencijacija. Vrednosti dužine tela, odontostileta i zamene stileta se progresivno povećavaju po stupnjevima. Ne postoje morfološke i anatomske razlike izuzev morfometrijskih između dva primerka mužjaka. Mužjak pronađen u populaciji Loznica je duži ali uži od mužjaka iz italijanske populacije, ima duži i širi rep, veći prečnik glave a kraći odontostilet i spikul. Kvalitativne morfološke karakteristike ženki koje su ispoljile malo variranje su oblik glave i repa i položaj vulve. Dužina odontostileta kao i prečnik glave su pokazali najmanju varijabilnost. Najveću varijabilnost su pokazali dužina repa, indeksi c i c'. Ipak, svi morfološki karakteri jedinki iz Srbije su u opštoj saglasnosti sa generalnim opisom Mali i Hooper iz 1974
Tam Tam in je broekzak
No full textDit is het eindverslag van de stage "Tam Tam in je broekzak", die wij hebben uitgevoerd in het kader van IN3405 Bachelorproject. Deze stage is uitgevoerd bij Tam Tam B.V. te Rijswijk.Technische InformaticaComputer ScienceElectrical Engineering, Mathematics and Computer Scienc
Soil organic matter and carbon sequestration in forest stands on Mount Vesuvius
No full textSoil organic matter in forest ecosystems represent an important C pool. Litter fall is the largest source of organic material and nutrients for the organic and mineral layers in forest ecosystems. The chemical composition of plant litter has a large influence on soil microbial communities and is one of the main factors affecting litter decay rates and the dynamics of SOM. Introduction of alien species, in forest ecosystems, may have a potential allelopathic effect on other tree species and allelopathic chemical compounds produced by alien tree species might inhibit soil microbial activity with consequent effects on storage rates of SOM and ecosystem nutrient cycling. Until know little attention has been paid to this topic that is worthy of investigation because alien species are largely used for afforestation of poor soils or easily invade bare soils.
Forest stands at Mount Vesuvius are a convenient study area to investigate C sequestration in soil. Chronosequences of tree plantation occur on volcanic substrate of know age; moreover different species of trees have been used for afforestation including the alien invasive species Black locust (Robinia pseudoacacia L.). Thus it is possible to study carbon sequestration in the soil as related to the age of the stand and to type of tree cover.
In the two coeval (36 yrs old) stands on lapillus of the last eruption of Vesuvius, with a different tree cover (Black locust and Corsican pine, Pinus nigra Arn. var. corsicana), litter fall (years 2006–2008) is higher in the Corsican pine than in the Black locust stand (P < 0.05). Total Litter Fall over Basal area (TLF/BA) is 90.7 Kg/m2 for Black locust vs 210.2 Kg/m2 for Corsican pine and the higher litter fall amount of Corsican pine corresponds to the higher biomass. In the organic soil layers amounts of organic C are higher (P < 0.05) in Corsican pine as compared to Black locust stand (g/m2 = 2701.9 vs 1636.4), while in the mineral layers organic C amounts are lightly higher (but not statistically different) in Black locust than in Corsican pine soil (136 vs 116 g/m2). 13C CPMAS NMR data show that the aromaticity degree of humus is higher for Black locust than for Corsican pine (% Ar = 9.54 vs 7.08).
In the Stone pine cronosequence, litter fall (2006–2008) increases gradually from the younger stand (36 yrs old) to the oldest one (96 yrs old) and is positively related to tree basal area (BA); Total Litter Fall over Basal Area (TLF/BA) also increases with stand age (123 to 145 Kg/m2). Moreover chemical analyses of organic and mineral soil layers clearly indicate the accumulation of C with stand age (g/m2= 1053.9 for 36 yrs old stand vs 2523.5 for 66 yrs old one and vs 3065.2 for 96 yrs old one).
The results dealing with the black locust stand allow to conclude that Black locust litter: i) inhibit soil microorganisms activity, ii) produces a recalcitrant residue, rich of aromatic compounds, including 4–hydroxyacetophenon (indentified by 1H NMR), known for its allelopathic potential. This may lead to high accumulation of organic matter in the soil and thus to high C sequestration.
The comparison of all pine stands shows that the trend of litter fall and C sequestration, increases from the younger to the older stand
Melk in je koffie: Een onderzoek met mogelijkheden
No full textIn 1999 stond in de NRC een column van Karel Knip over de vraag uit de wetenschapsquiz of je direct een wolkje melk in je koffie moet doen als de bel gaat of dat je dat beter kunt doen als je terugkomt van de buitendeur. De column geeft een mooi beeld van wat er allemaal kan komen kijken als je wat dieper op de vraag ingaat. Er blijken veel mogelijkheden te zijn om ook in de klas met deze vraag aan de slag te gaan!ImPhys/Docente
Zo meet je de waarde van sociale investeringen
No full textWat leveren investeringen in de zachte, sociale kant van gebiedsontwikkeling op? Deze vraag houdt ontwikkelaars, gemeenten en beleggers al langer bezig. Een antwoord is te vinden via de capability-benadering. Hierbij staan niet de kwantitatieve fysieke functies centraal, maar de kwalitatieve mate waarin mensen in staat zijn deze te gebruiken.Practice Chair Urban Area Developmen
Als je oud wordt moet je de buurt uit
No full text"Als je oud wordt moet je de buurt uit" is een beschrijving van een planologisch onderzoek onder ouderen in de Da Costabuurt, een stadsvernieuwingsbuurt in Amsterdam Oud-West. Ervaringen en meningen van ouderen zij het uitgangspunt van dit onderzoek. Door groepsgesprekken en individuele interviews worden de knelpunten die zij ervaren in het zelfstandig wonen geïnventariseerd. Daaruit blijkt dat deze knelpunten zo urgent zijn, dat vele ouderen hierdoor worden gedwongen uit de buurt te verhuizen. In de aanbevelingsfeer ligt de nadruk op het versterken van de positie van ouderen in het stadsvernieuwingsproces. Ouderen zullen zich als groep actiever moeten opstellen, om meer greep te krijgen op de inrichting van hun directe omgeving.Delft University of Technolog
Capsule-like voids in SiC single crystal: Phase contrast imaging and computer simulations
No full textThe results of observation of capsule-like voids in silicon carbide (6H-SiC) single crystal by means of a phase contrast imaging technique with synchrotron radiation at the Pohang Light Source as well as computer simulations of such images are presented. A pink beam and a monochromated beam were used. The latter gives more pronounced images but they still are smoothed due to a finite detector resolution and the spatial coherence of the beam. Sizes and a structure of far field images are different from these of the objects. The computer simulations allow us to reproduce a shape and a size of the capsule-like void. (C) 2014 Author(s).open1111sciescopu
Forefoot pathology in rheumatoid arthritis identified with ultrasound may not localise to areas of highest pressure: cohort observations at baseline and twelve months
No full textBackgroundPlantar pressures are commonly used as clinical measures, especially to determine optimum foot orthotic design. In rheumatoid arthritis (RA) high plantar foot pressures have been linked to metatarsophalangeal (MTP) joint radiological erosion scores. However, the sensitivity of foot pressure measurement to soft tissue pathology within the foot is unknown. The aim of this study was to observe plantar foot pressures and forefoot soft tissue pathology in patients who have RA.Methods A total of 114 patients with established RA (1987 ACR criteria) and 50 healthy volunteers were assessed at baseline. All RA participants returned for reassessment at twelve months. Interface foot-shoe plantar pressures were recorded using an F-Scan® system. The presence of forefoot soft tissue pathology was assessed using a DIASUS musculoskeletal ultrasound (US) system. Chi-square analyses and independent t-tests were used to determine statistical differences between baseline and twelve months. Pearson’s correlation coefficient was used to determine interrelationships between soft tissue pathology and foot pressures.ResultsAt baseline, RA patients had a significantly higher peak foot pressures compared to healthy participants and peak pressures were located in the medial aspect of the forefoot in both groups. In contrast, RA participants had US detectable soft tissue pathology in the lateral aspect of the forefoot. Analysis of person specific data suggests that there are considerable variations over time with more than half the RA cohort having unstable presence of US detectable forefoot soft tissue pathology. Findings also indicated that, over time, changes in US detectable soft tissue pathology are out of phase with changes in foot-shoe interface pressures both temporally and spatially.Conclusions We found that US detectable forefoot soft tissue pathology may be unrelated to peak forefoot pressures and suggest that patients with RA may biomechanically adapt to soft tissue forefoot pathology. In addition, we have observed that, in patients with RA, interface foot-shoe pressures and the presence of US detectable forefoot pathology may vary substantially over time. This has implications for clinical strategies that aim to offload peak plantar pressures
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