Search results for "GB"
showing 10 items of 531 documents
Time spent on the smartphone does not relate to manual dexterity in young adults.
2021
Abstract Background The Grooved Pegboard Test (GPT) is widely adopted to evaluate manual dexterity, it presents normative data but the test is influenced by different factors. The influence of time spent on smartphones has not been considered before, for this reason, the objective of this study was to evaluate if smartphone use influences the time to complete the GPT. A total of 38 (21 women; 17 men) young adults 20.7 (1.5) years participated in the study. The time spent on the smartphones during the last seven days was recorded through the device itself and the GPT performance was measured. A correlation analysis between the time spent on the smartphone and GPT was performed while the t-te…
The next-generation liquid-scintillator neutrino observatory LENA
2012
We propose the liquid-scintillator detector LENA (Low Energy Neutrino Astronomy) as a next-generation neutrino observatory on the scale of 50 kt. The outstanding successes of the Borexino and KamLAND experiments demonstrate the large potential of liquid-scintillator detectors in low-energy neutrino physics. LENA's physics objectives comprise the observation of astrophysical and terrestrial neutrino sources as well as the investigation of neutrino oscillations. In the GeV energy range, the search for proton decay and long-baseline neutrino oscillation experiments complement the low-energy program. Based on the considerable expertise present in European and international research groups, the …
Ode laica per Chibok e Leah
2019
The volume contains two short poems by Nigerian Nobel Laureate Wole Soyinka -- "No, He Said!", dedicated to Nelson Mandela, from the Author's 1988 well-known collection "Mandela's Earth and Other Poems" and the recent "Mandela Comes to Leah", written purposely for this volume -- and the Author's 2019 long epic poem "A Humanist Ode to Chibok, Leah" denouncing all forms of fundamentalism and fanaticism as opposed to secular humanism. Soyinka pays tribute to the girls abducted in Chibok and to 15 year-old Leah Sharibu, one of the 108 girls abducted in 2018 from Dapchi, comparing her firm refusal to renounce her faith to Nelson Mandela's refusal to compromise his moral stance on Apartheid while…
Morphological determination of the phototrophic community composition of biological soil crusts in coastal sand dunes in northern Germany
2022
This dataset comprises the microbial community composition of biological soil crusts in north-German sand dunes. For this we obtained enrichment cultures of phototrophic microorganisms, by placing fragments of biocrusts of the same Petri dishes as used for sequencing, in Petri dishes with Bold Basal (1N BBM) agarized medium (Bischoff and Bold 1963). Cultures were grown under standard laboratory conditions: with a 12-hour alteration of light and dark phases and irradiation of 25 μmol photons m-2 s-1 at a temperature 20 ± 5 ºС. Microscopic study of these raw cultures began in the third week of cultivation. Morphological examinations were performed using Olympus BX53 light microscope with Noma…
"Table 1" of "Electromagnetic fission of U-238 at 600-MeV and 1000-MeV per nucleon"
1997
Electromagnetic fission.
A novel approach to measure the cross section of the 18O(p, α)15N resonant reaction in the 0-200 keV energy range
2009
The 18O(p, ?)15N reaction is of primary importance to pin down the uncertainties, due to nuclear physics input, affecting present-day models of asymptotic giant branch stars. Its reaction rate can modify both fluorine nucleosynthesis inside such stars and oxygen and nitrogen isotopic ratios, which allow one to constrain the proposed astrophysical scenarios. Thus, an indirect measurement of the low-energy region of the 18O(p, ?)15N reaction has been performed to access, for the first time, the range of relevance for astrophysical application. In particular, a full, high-accuracy spectroscopic study of the 20 and 90 keV resonances has been performed and the strengths deduced to evaluate the r…
WILLIAM FIELDING OGBURN AND THE INSTITUTIONALISTS. A CASE OF THEORETICAL AND METHODOLOGICAL CONVERGENCE?
2014
This paper investigates the relationship between William Ogburn and the Institutionalists. This is done by assessing Ogburn's contribution in the light of the methodological debates that animated academia during the 1920s and the early 1930s - the years that marked the peak of the Institutionalists influence in American economics - and by comparing his work with that of some of the more 'sociologically oriented' figures of the movement. The present paper is organized as follows. The first two sections deal with Ogburn's epistemic commitments with respect to the main methodological debates of the period. The second section reviews Ogburn's 1922 Social Change and his theory of social evolutio…
All-optical measurements of background, amplitude, and timing jitters for high speed pulse trains or PRBS sequences using autocorrelation function
2008
International audience; We present a simple method for all-optical measurements of background, amplitude, and timing jitters of ultra high speed pulse trains or PRBS sequences using the jitter dependence of the intercorrelation-peak shape. This method is numerically and experimentally demonstrated on a 42.66 Gbit/s PRBS sequence and then applied to measure the jitter growths occurring during the propagation of a 160-GHz pulse train in a classical SMF/DCF dispersion map.
Assessment of efficiencies of electroporation and sonoporation methods by using fluorescence RGB imaging method
2013
Simple RGB method for fluorescence in vivo imaging is presented to assess efficiency of electroporation and sonoporation methods by measuring distribution and accumulation of green fluorescence protein (GFP) concentration. 20 laboratory measurements were performed on mice to test the method.
La distribuzione di Maxwell-Boltzmann: i risultati di una sperimentazione svolta nell'ambito dei corsi di laurea in ingegneria
2011
This paper describes the outcomes of an teaching experiment conducted in the seminar held at the Faculty Engineering of Palermo University. The theme of the seminar focused on undergraduate experiment that yields the velocity distribution of thermionic electrons by analyzing the I-V characteristics of diodes and triodes. By using a simple model, the velocity distribution of thermionic electrons emitted by the vacuum tube cathode can be described by Maxwell's distribution. The experiment allows students to focus on the distribution function more than on difficulties arising from the complexity of thermionic emission. Questo articolo descrive i risultati di una sperimentazione didattica condo…