Search results for "RFI"

Caracterización molecular de las neoplasias mieloides relacionadas con la terapia

2018

Las neoplasias mieloides relacionadas con la terapia (NMRT) se definen como aquellas leucemias mieloblásticas agudas (LMA) ó síndromes mielodisplásicos (SMD) desarrollados en pacientes previamente tratados con quimioterapia, radioterapia ó la combinación de ambas por una patología previa. Constituyen una de las mayores complicaciones de los supervivientes de otras formas de cáncer, representando entre un 10-20% de las LMA en el momento actual. Además, se presupone una incidencia en aumento a medio plazo debido a la mejora en la supervivencia de los pacientes oncológicos. Por otro lado se considera un grupo de pacientes con mal pronóstico per se aunque se les aplican los mismos factores de r…

Multi-Chip RFID Antenna Integrating Shape-Memory Alloys for Detection of Thermal Thresholds

2011

Low-cost wireless measurement of objects' temperature is one of the greatest expectation of radiofrequency identification technology for the so many applications in cold supply-chain control and safety assessment in general. In this context, the paper proposes a dual-chip UHF tag embedding shape memory alloys (SMA) able to transform the variation of the tagged item's temperature into a permanent change of antenna radiation features. This event-driven antenna is hence able to selectively activate the embedded microchips according to the temperature above or below a given threshold. A general design methodology for the resulting two-ports tag antenna is here introduced and then applied to pro…

La shelf life per la gestione delle scorte

2011

“Cola u’ Nanu”: an early nineteenth century case of disproportionate small stature

2022

This report considers Cola “u’ Nanu” (Cola the Dwarf) (Fig. 1) who was depicted in 1840 by the famous nineteenth century Sicilian painter Michele Panebianco (1806–1873).

Management Simulator as an Instrument to Aid Turning “Stunted Growth” Round in Family Businesses

2008

This paper is the fourth in a series which has described the role and construction of simulation models and a ‘Management Flight Simulator’ that could aid the entrepreneur-owners of so-called ‘dwarf’ or ‘stunted growth’ small firms to break out from the constraints holding them back. While the research presented to date has highlighted the issues in such companies, and has suggested that in many situations relatively simple changes only might be needed to unleash the growth potential of such firms, effecting such changes is not likely to be that “simple” in real life. It has to be possible for affected owner-entrepreneurs to understand a number of factors: that there is a problem (or opport…

Materials for depollution based on the model of manganese dioxygenase

2013

La utilización intensiva de pesticidas ha traído consigo la presencia de una gran cantidad de moléculas contaminantes en aguas y suelos. Los tratamientos para degradar estas moléculas son caros, por lo que es de gran interés la búsqueda de soluciones más baratas. En el caso de los catecoles, existen enzimas, las catecol-dioxigenasas, que abren el ciclo aromático por oxidación con dioxígeno. Las condiciones suaves y la gran disponibilidad de este oxidante podrían ofrecer una solución para esos problemas de polución. El objetivo de este trabajo de tesis es mimetizar un tipo particular de dioxigenasa, la dioxigenasa de manganeso. Dado que tanto la primera esfera de coordinación como la segunda…

Optical absorption and electron paramagnetic resonance of the E’_alfa center in amorphous silicon dioxide

2008

We report a combined study by optical absorption OA and electron paramagnetic resonance EPR spectroscopy on the E point defect in amorphous silicon dioxide a-SiO2. This defect has been studied in -ray irradiated and thermally treated oxygen-deficient a-SiO2 materials. Our results have pointed out that the E center is responsible for an OA Gaussian band peaked at 5.8 eV and having a full width at half maximum of 0.6 eV. The estimated oscillator strength of the related electronic transition is 0.14. Furthermore, we have found that this OA band is quite similar to that of the E center induced in the same materials, indicating that the related electronic transitions involve states highly locali…

Optical absorption band at 5.8 eV associated with the E’_gamma centers in amorphous silicon dioxide: Optical absorption and EPR measurements

2008

Line shape modifications induced by thermal treatment in the optical absorption and electron paramagnetic resonance EPR signals associated with the E center are experimentally investigated in various types of -irradiated amorphous silicon dioxide a-SiO2. The g values of the EPR main resonance line of the E center show a shift correlated with the peak energy variation of the absorption band at about 5.8 eV associated with this defect. These spectroscopic changes are proposed to originate from structural modifications of the defect environment. The correlation is theoretically explained considering that the spin-orbit interaction couples the g-tensor’s elements and the electronic energy level…

Role of H2O in the thermal annealing of the E’_gamma center in amorphous silicon dioxide

2009

Unethical but not illegal: Uncovering the persuasive messages leveraged by providers of the “real” online social impressions

2018

Due to the drastically elevated prominence of social networking sites (SNS), online social impressions such as views, comments, followers, subscribers, likes, and dislikes have become a valuable currency that translates to popularity, credibility, and even financial gains. Aside from machine-generated impressions, a growing industry known as crowdturfing utilizes human workers to provide “real” social impressions as-a-service. Although crowdturfing platforms are often seen as a clear example of deceptive conduct, they justify their business by leveraging well-crafted persuasive strategies and ethical appeals. Given the increasingly significant role of online impressions on shaping people’s …