456 research outputs found
Exploring Consumersâ Attitudes of Smart TV Related Privacy Risks
A number of privacy risks are inherent in the Smart TV ecosystem. It is likely that many consumers are unaware of these privacy risks. Alternatively, they might be aware but consider the privacy risks acceptable. In order to explore this, we carried out an online survey with 200 participants to determine whether consumers were aware of Smart TV related privacy risks. The responses revealed a meagre level of awareness. We also explored consumersâ attitudes towards specific Smart TV related privacy risks.
We isolated a number of factors that influenced rankings and used these to develop awareness-raising messages. We tested these messages in an online survey with 155 participants. The main finding was that participants were generally unwilling to disconnect their Smart TVs from the Internet because they valued the Smart TVâs Internet functionality more than their privacy. We subsequently evaluated the awareness-raising messages in a second survey with 169 participants, framing the question differently. We asked participants to choose between five different Smart TV Internet connection options, two of which retained functionality but entailed expending time and/or effort to preserve privacy
Lipodystrophy as a late effect after stem cell transplantation
Survivors of childhood cancer are at high risk of developing metabolic diseases in adulthood. Recently, several patients developing partial lipodystrophy following hematopoietic stem cell transplantation (HSCT) have been described. In this review, we summarize the cases described so far and discuss potential underlying mechanisms of the disease. The findings suggest that HSCT-associated lipodystrophies may be seen as a novel form of acquired lipodystrophy
Formation of ultracold RbCs molecules by photoassociation
The formation of ultracold metastable RbCs molecules is observed in a double
species magneto-optical trap through photoassociation below the
^85Rb(5S_1/2)+^133Cs(6P_3/2) dissociation limit followed by spontaneous
emission. The molecules are detected by resonance enhanced two-photon
ionization. Using accurate quantum chemistry calculations of the potential
energy curves and transition dipole moment, we interpret the observed
photoassociation process as occurring at short internuclear distance, in
contrast with most previous cold atom photoassociation studies. The vibrational
levels excited by photoassociation belong to the 5th 0^+ or the 4th 0^-
electronic states correlated to the Rb(5P_1/2,3/2)+Cs(6S_1/2) dissociation
limit. The computed vibrational distribution of the produced molecules shows
that they are stabilized in deeply bound vibrational states of the lowest
triplet state. We also predict that a noticeable fraction of molecules is
produced in the lowest level of the electronic ground state
Intercomparación multilateral de potencia elétrica, entre los laboratorios nacionales de Alemania, Argentina, Brasil y Uruguay
Se presentan en este trabajo los resultados de la intercomparaciĂłn en Potencia ElĂ©ctrica, entre los Laboratorios Nacionales de Alemania: Physikalisch â Technischen Bundesanstalt (PTB), Argentina: Instituto Nacional de TecnologĂa Industrial (INTI), Brasil: Instituto Nacional de MetrologĂa, Normalizaçao e Qualidade Industrial (INMETRO) y Uruguay: Usinas y Trasmisiones ElĂ©ctricas (UTE), llevada a cabo durante 2004. El elemento utilizado como instrumento viajero fue un patrĂłn de potencia perteneciente al PTB. Los resultados muestran valores compatibles para todos los laboratorios participantes, teniendo en cuenta los valores de desvĂo como las incertidumbres declaradas.Fil: Izquierdo, D. Usinas y Trasmisiones ElĂ©ctricas (UTE); UruguayFil: Faverio, C. Usinas y Trasmisiones ElĂ©ctricas (UTE); UruguayFil: Slomovitz, D. Usinas y Trasmisiones ElĂ©ctricas (UTE); UruguayFil: Ihlenfeld, W. G. K. Physikalisch â Technischen Bundesanstalt (PTB); AlemaniaFil: Di Lillo, Lucas. Instituto Nacional de TecnologĂa Industrial (INTI); ArgentinaFil: Laiz, HĂ©ctor. Instituto Nacional de TecnologĂa Industrial (INTI); ArgentinaFil: GarcĂa, Ricardo. Instituto Nacional de TecnologĂa Industrial (INTI); ArgentinaFil: Franco, A. M. R. Instituto Nacional de MetrologĂa, Normalizaçao e Qualidade Industrial (INMetro); BrasilFil: Debatin, R. M. Instituto Nacional de MetrologĂa, Normalizaçao e Qualidade Industrial (INMetro); Brasi
Ideal Multipole Ion Traps from Planar Ring Electrodes
We present designs for multipole ion traps based on a set of planar, annular,
concentric electrodes which require only rf potentials to confine ions. We
illustrate the desirable properties of the traps by considering a few simple
cases of confined ions. We predict that mm-scale surface traps may have trap
depths as high as tens of electron volts, or micromotion amplitudes in a 2-D
ion crystal as low as tens of nanometers, when parameters of a magnitude common
in the field are chosen. Several example traps are studied, and the scaling of
those properties with voltage, frequency, and trap scale, for small numbers of
ions, is derived. In addition, ions with very high charge-to-mass ratios may be
confined in the trap, and species of very different charge-to-mass ratios may
be simultaneously confined. Applications of these traps include quantum
information science, frequency metrology, and cold ion-atom collisions.Comment: Section on trapping of a single ion added, two figures added, one
formula corrected, otherwise minor change
Essential versus accessory aspects of cell death: recommendations of the NCCD 2015
Cells exposed to extreme physicochemical or mechanical stimuli die in an uncontrollable manner, as a result of their immediate structural breakdown. Such an unavoidable variant of cellular demise is generally referred to as âaccidental cell deathâ (ACD). In most settings, however, cell death is initiated by a genetically encoded apparatus, correlating with the fact that its course can be altered by pharmacologic or genetic interventions. âRegulated cell deathâ (RCD) can occur as part of physiologic programs or can be activated once adaptive responses to perturbations of the extracellular or intracellular microenvironment fail. The biochemical phenomena that accompany RCD may be harnessed to classify it into a few subtypes, which often (but not always) exhibit stereotyped morphologic features. Nonetheless, efficiently inhibiting the processes that are commonly thought to cause RCD, such as the activation of executioner caspases in the course of apoptosis, does not exert true cytoprotective effects in the mammalian system, but simply alters the kinetics of cellular demise as it shifts its morphologic and biochemical correlates. Conversely, bona fide cytoprotection can be achieved by inhibiting the transduction of lethal signals in the early phases of the process, when adaptive responses are still operational. Thus, the mechanisms that truly execute RCD may be less understood, less inhibitable and perhaps more homogeneous than previously thought. Here, the Nomenclature Committee on Cell Death formulates a set of recommendations to help scientists and researchers to discriminate between essential and accessory aspects of cell death
Calibration of the Logarithmic-Periodic Dipole Antenna (LPDA) Radio Stations at the Pierre Auger Observatory using an Octocopter
An in-situ calibration of a logarithmic periodic dipole antenna with a
frequency coverage of 30 MHz to 80 MHz is performed. Such antennas are part of
a radio station system used for detection of cosmic ray induced air showers at
the Engineering Radio Array of the Pierre Auger Observatory, the so-called
Auger Engineering Radio Array (AERA). The directional and frequency
characteristics of the broadband antenna are investigated using a remotely
piloted aircraft (RPA) carrying a small transmitting antenna. The antenna
sensitivity is described by the vector effective length relating the measured
voltage with the electric-field components perpendicular to the incoming signal
direction. The horizontal and meridional components are determined with an
overall uncertainty of 7.4^{+0.9}_{-0.3} % and 10.3^{+2.8}_{-1.7} %
respectively. The measurement is used to correct a simulated response of the
frequency and directional response of the antenna. In addition, the influence
of the ground conductivity and permittivity on the antenna response is
simulated. Both have a negligible influence given the ground conditions
measured at the detector site. The overall uncertainties of the vector
effective length components result in an uncertainty of 8.8^{+2.1}_{-1.3} % in
the square root of the energy fluence for incoming signal directions with
zenith angles smaller than 60{\deg}.Comment: Published version. Updated online abstract only. Manuscript is
unchanged with respect to v2. 39 pages, 15 figures, 2 table
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