Search results for "NIH"

Structural-relaxation phenomena in As–S glasses as probed by combined PAL/DBAR technique

2015

Abstract Experimental techniques exploring phenomena of positron–electron interaction, namely the positron annihilation lifetime spectroscopy and Doppler broadening of annihilation radiation, are shown to be very informative tools to study radiation- and thermally-induced phenomena in chalcogenide glasses of binary As–S system. Time-dependent processes of free-volume voids agglomeration (expansion), fragmentation (refining) and disappearing (contraction) are identified as main stages of physical aging in S-rich glasses, while a competitive channel of coordination topological defects formation associated with void charging becomes significant in a vicinity of near-stoichiometric glass compos…

Anomalous quartic gauge boson couplings at hadron colliders

2000

We analyze the potential of the Fermilab Tevatron and CERN Large Hadron Collider (LHC) to study anomalous quartic vector--boson interactions (photon photon Z Z) and (photon photon W+ W-). Working in the framework of SU(2)_L X U(1)_Y chiral Lagrangians, we study the production of photons pairs accompanied by (e+e-), (e nu), and jet pairs to impose bounds on these new couplings, taking into account the unitarity constraints. We compare our findings with the indirect limits coming from precision electroweak measurements as well as with presently available direct searches at LEPII. We show that the Tevatron Run II can provide limits on these quartic limits which are of the same order of magnitu…

El nihilismo en 'Crimen y castigo' de Dostoievski

2008

Wittgenstein leyó a los grandes novelistas rusos en la Viena de su juventud. Dostoievski quería contrarrestar las nefastas consecuencias criminales que, según sus previsiones, surgían de las doctrinas sociales y morales del nihilismo ruso. Su respuesta en profundidad, su tensa señal de alerta, fue precisamente la redacción de 'Crimen y castigo', novela que aquí se analiza desde su crítica al nihilismo.

Searches for heavy neutrinos from Z decays

1992

We have searched for possible fourth family heavy neutrinos, pair produced in Z0 decays, in a sample of about 112 000 hadronic Z0 final states collected with the DELPHI detector. For all mixing matrix elements we exclude a new Dirac neutrino lighter than 44.5 GeV at a 95% confidence level, if the neutrino couples to the electron or muon family, and lighter than 44.0 GeV, if the neutrino couples to the tau family. Depending on the values of the mixing element and to which lepton family the neutrino couples, we obtain mass limits up to 46.2 GeV. For all mixing matrix elements we exclude a new Majorana neutrino lighter than 39.0 GeV, if it couples to the electron or the muon family, and lighte…

Limits on a muon flux from Kaluza-Klein dark matter annihilations in the Sun from the IceCube 22-string detector

2010

A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with the 22-string configuration of the IceCube neutrino detector using data collected in 104.3 days of live-time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured lightest Kaluza-Klein particle (LKP) WIMPs in the Sun and converted to limits on the LKP-proton cross-sections for LKP masses in the range 250 -- 3000 GeV. These results are the most stringent limits to date on LKP annihilation in the Sun.

Modeling small‐scale cassava starch extraction. Simulation of the reduction of water consumption through a recycling process

2010

International audience; The purpose of this study was to model the extraction unit operation of the cassava starch manufacturing process and to propose a realistic recycling simulation in order to reduce the volumes of effluents. The model was developed from reactors which are commonly used for cassava starch extraction at a household scale in Vietnam. The reactors were tested using inflow starch as a marker at the beginning of the batch process. The experimental residence time distribution (RTDexp) was calculated by the outflow of the starch concentration. Using Matlab®, the RTDexp was compared to the theoretical residence time distribution (RTDth). The dynamic model obtained was built up …

Immunological characterization and engineering of the major latex allergen, hevein (Hev b 6.02)

2004

Piia Karisola tutki luonnonkumiallergiaa välittömän (tyyppi I) allergian mallina. Hän keskittyi työssään luonnonkumiallergian pääallergeeniin, heveiiniin (Hev b 6.02), jota vastaan 70 %:lla luonnonkumiallergisista potilaista on IgE-luokan vasta-aineita. Vuorovaikutus näiden vasta-aineiden ja heveiinin välillä aiheuttaa erilaisia kliinisiä oireita, kuten ihottuma, allergista nuhaa, nokkosrokkoa ja jopa anafylaksiaa. Joskus nämä IgE-luokan vasta-aineet tunnistavat ”vahingossa” samankaltaisia valkuaisaineita eri kasveista. Noin puolet luonnonkumiallergiaa sairastavista potilaista saakin oireita syötyään trooppisia hedelmiä, jota kutsutaan luonnonkumi-hedelmä -oireyhtymäksi.Karisolan väitöskirj…

The sleep quality of children with ADHD type of symptoms : a study on body motility

2003

New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spalla…

2021

Abstract The violation of baryon number, B , is an essential ingredient for the preferential creation of matter over antimatter needed to account for the observed baryon asymmetry in the Universe. However, such a process has yet to be experimentally observed. The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source to search for baryon number violation. The program will include high-sensitivity searches for processes that violate baryon number by one or two units: free neutron–antineutron oscillation ( n → n ̄ ) via mixing, neutron–antineutron oscillation via regeneration from a sterile neutron state ( n → [ n ′ , n ̄ ′ ] → n ̄ ), and neutron disappearan…

The Perception of Causality in Light of Process Ontology

2015

Human perception has an important emotional dimension. Besides having a “presentational” element that dominates the high cognitive activities of human beings, there are certain “densities of feelings,” which are inextricably intertwined with the presentational contents of our perceptual states. This does not mean that human perception is just instinctive, irrational, or intrinsically subjective. The Whiteheadian scheme allows us to determine the nature of the “emotional background” of perception without falling into the traps of subjectivism, representationalism, or substantialism. The feeling which I call “the sense of physicality” is just one of the elements of this emotional dimension in…