Search results for "spice"
showing 10 items of 54 documents
Comments on 'SPICE Model of Photomultiplier Tube Under Different Bias Conditions'
2021
[EN] The paper ¿SPICE Model of Photomultiplier Tube Under Different Bias Conditions¿ is commented. We revisit the mathematical formulation to compensate for some ambiguities in the original manuscript, and point out some inconsistencies in the results and reproducibility of the simulations, as well as in the optimized parameters originally obtained with the PSPICE simulation engine. All simulations are recalculated with the NGSPICE software using the corrected parameters and compared against the original figures. The reproducibility of our simulations is independently verified with PSPICE, as well as by numerically solving the analytical system of non-linear equations using Newton¿s method …
Prevalence and characteristics of prisoners requiring end-of-life care: A prospective national survey
2017
Background: Ensuring adequate end-of-life care for prisoners is a critical issue. In France, data investigating the impact of laws allowing release of seriously ill prisoners are lacking. Aim: To assess the number and characteristics of prisoners requiring palliative care in French prisons. Design: A prospective, national survey collecting data over a 3-month period. Setting/participants: All healthcare units ( n = 190) providing care for prisoners in France. The prison population was 66,698 during the study period. Data collection concerned prisoners requiring end-of-life care, that is, with serious, advanced, progressive, or terminal illness and life expectancy <1 year. Results: Estima…
A practical and transferable methodology for dose estimation in irradiated spices, based on thermoluminescence dosimetry
2008
Abstract The thermoluminescence technique is recommended by the European Committee for Standardization for the detection of irradiated food containing silicates as contaminants. In this work, the applicability of the thermoluminescence technique as a quantitative method to assess the original dose in irradiated oregano was studied; the additive-dose method was used, with reirradiation doses up to 600 Gy. The proposed new procedure allows to clearly discriminate irradiated from unirradiated samples, even after one year storage, and it gives an acceptable estimation of the original dose; the overall modified procedure requires only one day to be completed.
SPICE model for resistive gas and odour sensors
1999
A generalised PSPICE model of resistive gas/odour sensors is presented. The model simulates the response of both polymeric and metal oxide devices, as well as an integrated resistive heater that is used to set the operating temperature. In both cases there was good agreement between the observed responses and the PSPICE simulated responses to rectangular pulses of gases. The PSPICE model is not only simpler and faster to use than analytical solutions, but also should permit the rapid prototyping of associated drive circuitry.
A Design Methodology for Low-Power MCML Ring Oscillators
2007
In this paper, a low-power design method for MCML based ring oscillators is presented. The proposed method takes into account the parasitic capacitances of the MOS transistors. To validate it, some ring oscillators with different oscillation frequencies were designed in a 0.18 mum CMOS technology. SPICE simulations demonstrate the effectiveness of the design method.
Modeling Networks of Probabilistic Memristors in SPICE
2021
Efficient simulation of stochastic memristors and their networks requires novel modeling approaches. Utilizing a master equation to find occupation probabilities of network states is a recent major departure from typical memristor modeling [Chaos, solitons fractals 142, 110385 (2021)]. In the present article we show how to implement such master equations in SPICE – a general purpose circuit simulation program. In the case studies we simulate the dynamics of acdriven probabilistic binary and multi-state memristors, and dc-driven networks of probabilistic binary and multi-state memristors. Our SPICE results are in perfect agreement with known analytical solutions. Examples of LTspice code are…
Hidden attractors in dynamical models of phase-locked loop circuits : limitations of simulation in MATLAB and SPICE
2017
During recent years it has been shown that hidden oscillations, whose basin of attraction does not overlap with small neighborhoods of equilibria, may significantly complicate simulation of dynamical models, lead to unreliable results and wrong conclusions, and cause serious damage in drilling systems, aircrafts control systems, electromechanical systems, and other applications. This article provides a survey of various phase-locked loop based circuits (used in satellite navigation systems, optical, and digital communication), where such difficulties take place in MATLAB and SPICE. Considered examples can be used for testing other phase-locked loop based circuits and simulation tools, and m…
Electromechanical characterization of a bimorph piezo for Energy Harvesting applications in road infrastructures
2012
Piezoelectric materials can be used as a means of transforming ambient vibrations into electrical energy that can be stored and used to power other devices. With the recent surge of micro scale devices, piezoelectric power generation can provide a convenient alternative to traditional power sources used to operate certain types of sensors/actuators, telemetry, and MEMS devices. However, the energy produced by these materials is, in many cases, far too small to directly power an electrical device. In the present study, piezoelectric devices will be investigated and experimentally tested to determine each of their abilities to transform ambient vibration into electrical energy. Tested piezoel…
The acrobatics of dying
2015
This article aims at summing up the reflections of a small group of psychologists who work in the domain of palliative treatment. The theory and methodology supporting it are borrowed by a group analysis approach; the group's purpose is a research based on the workers' experience elaboration, which aims at finding out both the specificities of the work apparatus with the people accompanied to the conclusion of their lives, and the main thematic areas of the relationship between healthcare team, patients, and families. The work we present aims at introducing the most meaningful themes that emerged during group meetings: first of all, some service criticalities examined in the area of termina…
Shopping centres "Spice" and "Domina Shopping" marketing communication on social media Facebook and Instagram in 2021
2022
Bakalaura darba tēma ir “Tirdzniecības centru “Spice” un “Domina Shopping” mārketinga komunikācija sociālajos medijos Facebook un Instagram 2021. gadā”. Bakalaura darba mērķis ir, izpētīt kādu saturu sociālajos medijos Facebook un Instagram publicē tirdzniecības centri “Spice” un “Domina Shopping” un noskaidrot ar kādām sociālo mediju komunikācijas problēmām uzņēmumi ir saskārušies 2021. gadā, Covid-19 pandēmijas laikā. Bakalaura darbs ir veidots trīs daļās. Pirmā bakalaura darba daļa sastāv no teorijas par mārketinga komunikāciju, sociālajiem medijiem un mārketinga komunikāciju sociālajos medijos. Otrā daļā aprakstītas metodes, kas izmantotas bakalaura darbā - kvantitatīvā kontentanalīze, …