Search results for "Tipa"
showing 10 items of 596 documents
Event Excess in the MiniBooNE Search forν¯μ→ν¯eOscillations
2010
The MiniBooNE experiment at Fermilab reports results from a search for {nu}{sub {mu}{yields}{nu}e} oscillations, using a data sample corresponding to 5.66x10{sup 20} protons on target. An excess of 20.9{+-}14.0 events is observed in the energy range 475<E{sub {nu}}{sup QE}<1250 MeV, which, when constrained by the observed {nu}{sub {mu}} events, has a probability for consistency with the background-only hypothesis of 0.5%. On the other hand, fitting for {nu}{sub {mu}{yields}{nu}e} oscillations, the best-fit point has a {chi}{sup 2} probability of 8.7%. The data are consistent with {nu}{sub {mu}{yields}{nu}e} oscillations in the 0.1 to 1.0 eV{sup 2} {Delta}m{sup 2} range and with the evidence…
A test of charge-parity-time invariance at the atto-electronvolt scale
2017
We developed a novel fast measurement procedure for cyclotron frequency comparisons of two individual particles in a Penning trap, which enabled us to compare the charge-to-mass ratio of the proton and the antiproton with a fractional precision of 69 parts per trillion. To date this is the most precise test of charge-parity-time invariance using baryons. Our measurements were performed at cyclotron frequencies of about 30 MHz, which means that charge-parity-time symmetry holds at the atto-electronvolt scale.
Estimates of the Nuclear Time Delay in Dissipative U + U and U + Cm Collisions Derived from the Shape of Positron andδ-Ray Spectra
1983
Positron and delta-ray spectra have been measured in coincidence with quasielastic scattered particles and fission fragments from the bombardment of Pd, U, and Cm targets with U beams of energies between 5.9 and 8.4 MeV/u. For collisions leading to a fission reaction, the atomic positron and delta-ray spectra fall off more steeply at high energies than expected from calculations based on pure Rutherford trajectories. A quantitative analysis of this effect is in accord with a nuclear contact time of about 10/sup -21/ s.
Multimode OPOs as Sources for Multipartite Entanglement
2009
We present here multimode OPOs as a source of multimode squeezing and multipartite entanglement of continuous-wave light beams, with applications to the engineering of multimode states of light in the spatial and spectral domains.
Quantitative modeling of clinical, cellular, and extracellular matrix variables suggest prognostic indicators in cancer: a model in neuroblastoma
2014
BACKGROUND: Risk classification and treatment stratification for cancer patients is restricted by our incomplete picture of the complex and unknown interactions between the patient's organism and tumor tissues (transformed cells supported by tumor stroma). Moreover, all clinical factors and laboratory studies used to indicate treatment effectiveness and outcomes are by their nature a simplification of the biological system of cancer, and cannot yet incorporate all possible prognostic indicators. METHODS: A multiparametric analysis on 184 tumor cylinders was performed. To highlight the benefit of integrating digitized medical imaging into this field, we present the results of computational s…
Multi-party metering: An architecture for privacy-preserving profiling schemes
2013
Several privacy concerns about the massive deploy- ment of smart meters have been arisen recently. Namely, it has been shown that the fine-grained temporal traces generated by these meters can be correlated with different users behaviors. A new architecture, called multi-party metering, for enabling privacy-preserving analysis of high-frequency metering data without requiring additional complexity at the smart meter side is here proposed. The idea is to allow multiple entities to get a share of the high-frequency metering data rather than the real data, where this share does not reveal any information about the real data. By aggregating the shares provided by different users and publishing …
Efficient Simulation of Orthogonal Multicarrier Transmission over Multipath Fading Channels
2011
Filterbank orthogonal multicarrier transmission schemes, such as OFDM/OQAM, are currently under intense study for their spectral efficiency and suitability for the physical layer of Cognitive Radio. Nonetheless, the mathematical description of the signal is cumbersome, and closed form expressions for performance figures are not available, so performance analysis on fading channels has to be performed by means of simulations. We propose an algorithm for simulating the received signal over multipath frequency selective fading channels, based on Taylor series expansion of the channel transfer function. The proposed method is compared to the state-of-the-art FFT-based method in terms of computa…
Otrā tipa cukura diabēta pacientu sākotnējās ārstēšanas varianti un to efektivitāte
2017
Ievads: Otrā tipa cukura diabēts (2TCD) ir hroniska, progresējoša un kompleksa vielmaiņas traucējumu slimība, kas tiek uzskatīta par vienu no vislielākajiem izaicinājumiem 21. gs. medicīnā. Pēdējos gados, paplašinoties farmakoloģiskās terapijas iespējām 2TCD ārstēšanā, norit pētījumi un diskusijas par dažādo medikamentu lietošanas biežumu un efektivitāti, tomēr joprojām nepastāv vienprātība par to, kuru medikamentu kombinācijas visveiksmīgāk palīdz sasniegt glikēmiskos mērķus un terapijas izvēli visbiežāk nosaka tieši ārsta personīgā pieredze. Pētījuma mērķis: Izpētīt, kādas ir OPTIMED pētījumā iesaistīto endokrinologu tendences 2TCD ārstēšanas izvēlē un salīdzināt biežāk nozīmēto medikamen…
2. tipa diabēta pacientu un ārstu tuvināšana, lietojot Firbase datubāzi, veicinot attālinātu pārraudzību
2018
Cukura diabēts ir viena no visizplatītākajām slimībām pasaulē, kuras apmēri strauji turpina augt. Eiropā ar diabētu slimo vairāk kā 60 miljoni cilvēku, savukārt Latvijā 2016. gadā slimnieku skaits sasniedza gandrīz 90 000 cilvēku. Otrā tipa diabēts ir populārākais diabēta tips, skarot 90-95% slimnieku. Balstoties uz neseniem pētījumiem, ir pierādīts, ka efektīva atveseļošanās metode ir intervālu treniņi. Darba autors iesaistījās projektā “Staigā Vesels” un izstrādāja attālinātas pārraudzības sistēmu ārstiem un pacientiem, palīdzot aprobēt hipotēzi, ka regulāra un pārraudzīta intervālu treniņu veikšana uzlabo pacientu veselību. Galvenais darba mērķis ir izstrādāt sistēmu ārstiem un datu māko…
Quantum scrambling via accessible tripartite information
2023
Quantum information scrambling (QIS), from the perspective of quantum information theory, is generally understood as local non-retrievability of information evolved through some dynamical process, and is often quantified via entropic quantities such as the tripartite information. We argue that this approach comes with a number of issues, in large part due to its reliance on quantum mutual informations, which do not faithfully quantify correlations directly retrievable via measurements, and in part due to the specific methodology used to compute tripartite informations of the studied dynamics. We show that these issues can be overcome by using accessible mutual informations, defining corresp…