Search results for "back"
showing 10 items of 2078 documents
Distribution and spatial structure of pelagic fish schools in relation to the nature of the seabed in the Sicily Channel (Central Mediterranean).
2009
Hydroacoustic data collected during two echosurveys carried out in the Sicily Channel in 1998 and 2002 were analysed to investigate the distribution and spatial structure of small pelagic fish species in relation to the sedimentological nature of the sea bottom. The study was carried out on two contiguous areas (labelled ZONE 1 and ZONE 2) of the continental shelf off the southern coast of Sicily, characterised by different dominant texture, ‘sand’ for ZONE 1 and ‘clayey-silt’ for ZONE 2. Simultaneous information on small pelagic fish schools and the seabed was obtained using a quantitative echo-sounder (SIMRAD EK500) that measures echoes due to the scattering from both fish schools and the…
A Germanium Isocyanide Complex Featuring (n → π*) Back-Bonding and Its Conversion to a Hydride/Cyanide Product via C-H Bond Activation under Mild Con…
2012
Reaction of the diarylgermylene Ge(ArMe6)2 [ArMe6 = C6H3-2,6-(C6H2-2,4,6-(CH3)3)2] with tert-butyl isocyanide gave the Lewis adduct species (ArMe6)2GeCNBut, in which the isocyanide ligand displays a decreased C–N stretching frequency consistent with an n → π* back-bonding interaction. Density functional theory confirmed that the HOMO is a Ge–C bonding combination between the lone pair of electrons on the germanium atom and the C–N π* orbital of the isocyanide ligand. The complex undergoes facile C–H bond activation to produce a new diarylgermanium hydride/cyanide species and isobutene via heterolytic cleavage of the N–But bond. peerReviewed
Metabolites produced by agents of dieback of grapevine in Sicily: Lasiodiplodia mediterranea, Neofusicoccum parvum and N. vitifusiforme
2015
Botryosphaeria dieback was recently reported in West Sicilian vineyards. The disease complex was only associated with isolates of genus Lasiodiplodia in 2007 and together with Diplodia seriata, Neofusicoccum parvum and Neofusicoccum vitifusiforme, this latest reported for the first time on Vitis vinifera in Italy. Moreover, a representative isolate of each species was inoculated on green shoots and fulfilled Koch’s postulates, although the lengths of vascular discolourations were variable depending on the species. As well as the other GTD causal agents, the expression of foliar symptoms (pale colour along the margins and between veins) was also occasional in Sicily, it was hypothesized that…
Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo's first three observing runs
2021
We report results from searches for anisotropic stochastic gravitational-wave backgrounds using data from the first three observing runs of the Advanced LIGO and Advanced Virgo detectors. For the first time, we include Virgo data in our analysis and run our search with a new efficient pipeline called {\tt PyStoch} on data folded over one sidereal day. We use gravitational-wave radiometry (broadband and narrow band) to produce sky maps of stochastic gravitational-wave backgrounds and to search for gravitational waves from point sources. A spherical harmonic decomposition method is employed to look for gravitational-wave emission from spatially-extended sources. Neither technique found eviden…
An efficient grid-based RF fingerprint positioning algorithm for user location estimation in heterogeneous small cell networks
2014
This paper proposes a novel technique to enhance the performance of grid-based Radio Frequency (RF) fingerprint position estimation framework. First enhancement is an introduction of two overlapping grids of training signatures. As the second enhancement, the location of the testing signature is estimated to be a weighted geometric center of a set of nearest grid units whereas in a traditional grid-based RF fingerprinting only the center point of the nearest grid unit is used for determining the user location. By using the weighting-based location estimation, the accuracy of the location estimation can be improved. The performance evaluation of the enhanced RF fingerprinting algorithm was c…
Guía para ofrecer feedback a estudiantes
2013
Esta guía está vinculada al proyecto de innovación docente: DISEÑO DE UNA METODOLOGÍA PARA LA COMUNICACIÓN EN EL PROCESO DE EVALUACIÓN DE ESTUDIANTES: EL FEEDBACK PROFESOR/A-ESTUDIANTE (66/FO11/25) El objetivo fundamental de la guía, es ofrecer una metodología muy simple y fácil, para dar feedback dirigido a los estudiantes, donde éstos puedan recabar información de sus profesores acerca de los principales aspectos relativos a la evaluación de sus trabajos, en un plazo razonable de tiempo tras la finalización de un trabajo, actividad o asignatura.
Muntlig och skriftlig feedback på gymnasienivå : en fallstudie
2016
Opettajan antamalla palautteella on keskeinen rooli opetuksessa, sillä sen avulla oppilas saa tietää, miten hän etenee omassa oppimisprosessissansa. Lisäksi palautteella on vaikutus oppilaan motivaatioon ja itsetuntoon. Tämän tutkimuksen tavoitteena oli selvittää, miten lukiolaiset haluavat saada suullista ja kirjallista palautetta ruotsin ja englannin opetuksessa. Tarkastelin myös, miten opettajat antavat palautetta oppilaillensa ja onko kielten välissä havaittavissa mitään eroja. Tutkimusaineistoni muodostui 45 lukiolaisesta ja kahdesta opettajasta. Observoin kolme tuntia ruotsin opetusta ja kolme tuntia englannin opetusta, minkä jälkeen sekä lukiolaiset että opettajat vastasivat kyselyyn…
Staff Members’ Professional Agency within the Staff Community and the Education Policies: Supporting Integration in Multicultural and Multiling…
2022
In recent decades, increased diversity and migration have challenged school staff members’ ways of working. This study aimed to identify the challenges faced by Finnish school staff in supporting students with migrant backgrounds, and to elaborate on how they enact professional agency toward these challenges. The data consist of 15 thematic interviews with staff members across various work positions in two Finnish lower secondary schools. Based on thematic analysis, the challenges within the staff community and the education policies were found to include the following: (1) the diversification of students makes tensions more visible in the staff community, and (2) inflexible education polic…
Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV
2016
Physics letters / B B763, 238 - 250 (2016). doi:10.1016/j.physletb.2016.10.048
Features of W production in p-p, p-Pb and Pb-Pb collisions
2017
We consider the production of inclusive W bosons in variety of high-energy hadronic collisions: p--p, p--$\overline{\rm p}$, p--Pb, and Pb--Pb. In particular, we focus on the resulting distributions of charged leptons from W decay that can be measured with relatively low backgrounds. The leading-order expressions within the collinearly factorized QCD indicate that the center-of-mass energy dependence at forward/backward rapidities should be well approximated by a simple power law. The scaling exponent is related to the small-$x$ behaviour of the quark distributions, which is largely driven by the parton evolution. An interesting consequence is the simple scaling law for the lepton charge as…