Search results for " Ala"
showing 10 items of 239 documents
EPR/ALANINE PELLETS WITH LOW Gd CONTENT FOR NEUTRON DOSIMETRY
2013
This paper reports on results obtained by electron paramagnetic resonance (EPR) measurements and Monte Carlo (MC) simulation on a blend of alanine added with low content of gadolinium oxide (5 % by weight) to improve the sensitivity to thermal neutron without excessively affecting tissue equivalence. The sensitivity is enhanced by this doping procedure of more an order of magnitude. The results are compared with those obtained with the addition of boric acid (50 % by weight) where boron is in its natural isotopic composition in order to produce low-cost EPR dosemeters. The gadolinium addition influences neutron sensitivity more than the boron addition. The presence of additives does not sub…
Neutron flux and gamma dose measurement in the BNCT irradiation facility at the TRIGA reactor of the University of Pavia
2018
Abstract University of Pavia is equipped with a TRIGA Mark II research nuclear reactor, operating at a maximum steady state power of 250 kW. It has been used for many years to support Boron Neutron Capture Therapy (BNCT) research. An irradiation facility was constructed inside the thermal column of the reactor to produce a sufficient thermal neutron flux with low epithermal and fast neutron components, and low gamma dose. In this irradiation position, the liver of two patients affected by hepatic metastases from colon carcinoma were irradiated after borated drug administration. The facility is currently used for cell cultures and small animal irradiation. Measurements campaigns have been ca…
Asymmetrical interspecific communication in avian mixed species colonies
Sympatric species derive benefits by attending to information conveyed by heterospecifics. We previously reported reduced vigilance among jackdaws (Corvus monedula) and lesser kestrels (Falco numanni) residing in mixed species colonies and conducted the present study to test for interspecific communication of threat associated with European magpies (Pica pica) as nest predators. After quantifying structural differences in jackdaw and lesser kestrel calls relative to European magpie versus non-predator models, we played back calls of jackdaws and lesser kestrels representative of the different model types to test whether receivers perceive threat-related variation in either conspecific or he…
Opettaja, oppilas ja vanhemmat arviointikeskustelussa : "Se lapsi on siinä keskipiste ja kaikki puhaltaa yhteen hiileen..."
1999
Sanomalehden avulla kohti elämänhallintaa : viikoittainen sanomalehtitunti kuudesluokkalaisen oppimisen avartajana
2002
Toistuvat ruudut sarjakuvaromaanissa Watchmen
2014
Tarkastelen pro gradu -tutkielmassani toistuvia ruutuja Alan Mooren, Dave Gibbonsin ja John Higginsin sarjakuvaromaanissa Watchmen (1986–87). Teokseen sisältyy useita kymmeniä sarjakuvaruutuja, jotka esitetään sarjakuvan mittaan useammin kuin yhden kerran – useimmin toistetut jopa neljästi tai viidesti. Saman ruudun toistuminen on mielenkiintoinen sarjakuvakerronnan keino, jota ei sellaisenaan esiinny muissa mediumeissa. Lähestyn toistuvia ruutuja sarjakuvakerronnan tutkimuksen eli sarjakuvanarratologian näkökulmasta. Testaan samalla erityisesti kerronnan näkökulmaan tai fokalisaatioon sekä kertojaan liittyvien teoreettisten jäsennysten soveltumista sarjakuvakerronnan analyysiin. Watchmenin…
Alastair Reynolds: Ikirouta
2020
Kirja-arvostelu teoksesta Alastair Reynolds: Ikirouta, suom. Hannu Tervaharju, Like SciFi, 2020 nonPeerReviewed