Optical measurement of Scots pine heartwood stilbene content

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Männyn sydänpuun stilbeenipitoisuuden optinen mittaus

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Shape coexistence at the proton drip-line: First identification of excited states in 180Pb

Excited states in the extremely neutron-deficient nucleus, 180Pb, have been identified for the first time using the JUROGAM II array in conjunction with the RITU recoil separator at the Accelerator Laboratory of the University of Jyvaskyla. This study lies at the limit of what is presently achievable with in-beam spectroscopy, with an estimated cross-section of only 10 nb for the 92Mo(90Zr,2n)180Pb reaction. A continuation of the trend observed in 182Pb and 184Pb is seen, where the prolate minimum continues to rise beyond the N=104 mid-shell with respect to the spherical ground state. Beyond mean-field calculations are in reasonable correspondence with the trends deduced from experiment.Comment: 5 pages, 4 figures, submitted to Phys.Rev.

Parametric hazard rate models for long-term sickness absence

PURPOSE: In research on the time to onset of sickness absence and the duration of sickness absence episodes, Cox proportional hazard models are in common use. However, parametric models are to be preferred when time in itself is considered as independent variable. This study compares parametric hazard rate models for the onset of long-term sickness absence and return to work. METHOD: Prospective cohort study on sickness absence with four follow-up years of 53,830 employees working in the private sector in the Netherlands. The time to onset of long-term (>6 weeks) sickness absence and return to work were modelled by parametric hazard rate models. RESULTS: The exponential parametric model with a constant hazard rate most accurately described the time to onset of long-term sickness absence. Gompertz-Makeham models with monotonically declining hazard rates best described return to work. CONCLUSIONS: Parametric models offer more possibilities than commonly used models for time-dependent processes as sickness absence and return to work. However, the advantages of parametric models above Cox models apply mainly for return to work and less for onset of long-term sickness absence

Visualizing multi-dimensional pareto-optimal fronts with a 3D virtual reality system

In multiobjective optimization, there are several targets that are in conflict, and thus they all cannot reach their optimum simultaneously. Hence, the solutions of the problem form a set of compromised trade-off solutions (a Pareto-optimal front or Pareto-optimal solutions) from which the best solution for the particular problem can be chosen. However, finding that best compromise solution is not an easy task for the human mind. Pareto-optimal fronts are often visualized for this purpose because in this way a comparison between solutions according to their location on the Pareto-optimal front becomes somewhat easier. Visualizing a Pareto-optimal front is straightforward when there are only two targets (or objective functions), but visualizing a front for more than two objective functions becomes a difficult task. In this paper, we introduce a new and innovative method of using three-dimensional virtual reality (VR) facilities to present multi-dimensional Pareto-optimal fronts. Rotation, zooming and other navigation possibilities of VR facilities make easy to compare different trade-off solutions, and fewer solutions need to be explored in order to understand the interrelationships among conflicting objective functions. In addition, it can be used to highlight and characterize interesting features of specific Pareto-optimal solutions, such as whether a particular solution is close to a constraint boundary or whether a solution lies on a relatively steep trade-off region. Based on these additional visual aids for analyzing trade-off solutions, a preferred compromise solution may be easier to choose than by other means

Varhaislapsuuden tunnetaidot ja Fanni-kirjasarja tunnetaitojen tukena

Tiivistelmä. Tässä kandidaatintutkielmassa tarkoituksena on tutkia varhaiskasvatusikäisten lasten tunnetaitoja ja miten niitä voidaan tukea Fanni-kirjasarjan avulla. Tutkimuskysymykseni oli “Miten 4–6-vuotiaan tunnetaitoja voidaan tukea Fanni-kirjasarjan avulla?“ Tutkimus on toteutettu kuvailevana kirjallisuuskatsauksena. Teoreettinen viitekehys rakentuu sekä suomen- että englanninkielisistä teoksista. Viitekehyksessä määrittelen lapsen tunteiden kehittymistä vastasyntyneestä alkaen, tunnetaitoja, tunnekasvatusta ja aikuisen roolia lapsen tunnekasvatuksessa sekä ongelmia tunnetaidoissa. Fanni-kirjasarjasta analysoin kolmea ensimmäistä kirjaa. Analysoin kirjasarjaa vapaasti peilaten teoreettiseen viitekehykseen. Tarve pienten lasten tunnekasvatukselle on lisääntyvä. Tunnetaitojen tukeminen vaatii aikuiselta tietoista panostusta ja aiheeseen perehtymistä. Tämän tutkielman tavoitteena on tarjota tietoa tunnetaitojen tärkeydestä lapsen elämässä sekä tuoda esille yhtä mahdollista tunnetaitojen tukemiseen sopivaa kirjasarjaa: Fanni-kirjasarjaa. Tutkimustulosten perusteella tunnetaidot ovat monimutkainen asia, jonka toimintaa ei täysin osata selittää. Kulttuuri vaikuttaa siihen, miten ymmärrämme tunteita. Lapsen tunnetaitojen kehittymiselle on tärkeää aitous, rehellisyys, aikuisen roolimalli sekä aikuisen läsnäolo. Lapsi tarvitsee tilaa ja aikaa tunteilleen. Fanni-kirjasarja tukee lasta oppimaan tunnetaitojen peruspilareita: tunteiden tunnistamista ja nimeämistä, tunteiden säätelyä sekä stressinhallintaa. Kirjasarja tukee näitä taitoja tarinan, tieto-osuuden ja tehtävien avulla