Search results for "Rete"

Spatial Memory Drives Foraging Strategies of Wolves, but in Highly Individual Ways

2022

The ability of wild animals to navigate and survive in complex and dynamic environments depends on their ability to store relevant information and place it in a spatial context. Despite the centrality of spatial memory, and given our increasing ability to observe animal movements in the wild, it is perhaps surprising how difficult it is to demonstrate spatial memory empirically. We present a cognitive analysis of movements of several wolves (Canis lupus) in Finland during a summer period of intensive hunting and den-centered pup-rearing. We tracked several wolves in the field by visiting nearly all GPS locations outside the den, allowing us to identify the species, location and timing of ne…

Transversal competences and character education in Latvia: needs analysis report

2018

The national report “Transversal competences and character education in Latvia: Needs analysis report” is a part of the transnational intellectual output 1 “Needs analysis report” elaborated within the Erasmus+ project “Supporting teachers for developing intra-personal competences and character education at school (ARETE CATALYST)”, 2017-1-LV01-KA201-035435. The research report is structured in four parts as follows: 1) A detailed description of transversal competences and character education in Latvia; 2) Case studies of best practices in Latvia; 3) Benchmarking of transversal competences and character education in UK and USA; 4) Developing pupils’ intrapersonal competencies and character …

Gas-liquid chromatography and lipophilicity of esters of benzoic acids

1987

Abstract The use of gas-liquid chromatographic (GLC) retention indices for the determination of lipophilicity was studied for a series of alkyl and arylalkyl esters of substituted benzoic acids. The regression relationships between the logarithms of the partition coefficients and the retention characteristics measured on two cpillary columns, SE-30 and OV-351, were evaluated. The behaviour of arylalkyl esters and of alkyl esters cannot be expressed in terms of a single regression equation. This is probably a consequence of the effect of the intramolecular hydrophobic interaction upon the retention of arylalkyl esters under GLC conditions. An analysis of the isokinetic relationships revealed…

Gas chromatography of homologous esters

1984

Abstract The gas chromatographic retention behaviour of the butanoyl and 2-, 3- and 4-chlorobutanoyl esters of C 3 —C 5 saturated aliphatic branched-chain and unsaturated C 3 —C 6 alcohols on SE-30 and OV-351 glass capillary columns operated iso-thermally at several temperatures is reported. Retention index increments at 80, 120 and 160°C show the effects of chain branching and the olefinic and acetylenic unsaturation in the alkyl chain and the effect of the position of the chlorine substituent in the acyl chain. The results are compared with the behaviour of the corresponding n -alkyl esters and the chlorinated propanoyl esters.

Gaschromatographisch-massenspektrometrische identifizierung der durch umsetzung von aminen mit isocyanaten gebildeten harnstoffderivate

1977

Abstract Gas chromatographic-mass spectrometric identification of urea derivatives formed by the reaction of amines with isocyanates N,N′-Di- and N,N′,N′-trisubstituted ureas constitute suitable derivatives for the gas chromatographic (GC) determination of primary and secondary amines. The GC identification of N- tert. -butyl-,N′,N′-alkyl urea derivatives presented in the first communication has been succesfully confirmed by mass spectrometry (MS) and mass fragmentometry. The reproduced mass spectra of six N- tert. -butyl-,N′,N′-alkyl ureas were interpreted according to the decomposition mechanisms of less complicated alkyl ureas known from the literature. Using combined GC-MS the detection…

Inversion of the Triphenylamine Molecule

1964

La comunità educante di fronte alla pandemia: possibili strategie di intervento e nuovi scenari in un’ottica di rete

2022

Quando nel mese di marzo 2020, anche i servizi educativi 0-6 in Italia furono chiusi in base alle misure di sicurezza per pandemia da Covid 19, ci si ritrovò da un giorno all’altro e senza alcuna esperienza pregressa, ad organizzare delle forme di educazione a distanza e di sostegno alle famiglie e ai bambini. Nell’articolo, in particolare, descrivo come si è cercato di far fronte all’emergenza nei nidi e nelle scuole dell’infanzia gestiti dal Comune di Palermo e come l’esperienza del primo lock down abbia permesso di mettere a fuoco alcune strategie di intervento che si sono rivelate una risorsa potenzialmente trasferibile in situazioni di normalità. Sottolineo, inoltre, come la necessità …

Compensazione Geodetica della rete siciliana UNIPA-NetGeo

2012

Come è noto un servizio di posizionamento GNSS materializza un sistema di riferimento e distribuisce all’utenza che opera nel settore geodetico dati, prodotti e stime delle coordinate nel medesimo sistema. Per questo motivo si rende necessaria un accurata e continua stima delle coordinate, delle stazioni permanenti che compongono la rete, effettuata attraverso opportuni processi di compensazione. A tal proposito, considerato il notevole incremento delle stazioni permanenti presenti nel territorio Italiano, l’inquadramento geodetico delle reti regionali dovrebbe essere effettuato nel sistema di riferimento globale, per non incorrere nelle notevoli differenze di coordinate stimate tra le reti…

La monarchie anglo-normande face à la conspiration. La révolte des earls de 1075

2009

National audience; En 1075, trois des plus grands barons d'Angleterre trament une conspiration contre Guillaume le Conquérant. Sous le voile d'une juste résistance à l'action d'un souverain considéré comme un tyran se dissimule ce qui n'est autre qu'une tentative de coup d'Etat. Cet article propose une analyse du complot (ses formes théoriques et concrètes) et les réactions du pouvoir.

Evaluation of the primary stability in dental implants placed in low density bone with a new drilling technique, osseodensification: an in vitro study

2020

Background Primary stability is an important key determinant of implant osseointegration. We investigated approaches to improve primary implant stability using a new drilling technique termed osseodensification (OD), which was compared with the conventional under-drilling (UD) method utilized for low-density bones. Material and Methods We placed 55 conical internal connection implants in each group, in 30 low-density sections of pig tibia. The implants were placed using twist drill bits in both groups; groups Under Drilling (UD) and Osseodensification (OD) included bone sections subjected to conventional UD and OD drilling, respectively. Before placing the implants, we randomized the bone s…