Littérature scientifique sur le sujet « Dynamic binary model »
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Articles de revues sur le sujet "Dynamic binary model"
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de Jong, Robert M., and Tiemen Woutersen. "DYNAMIC TIME SERIES BINARY CHOICE." Econometric Theory 27, no. 4 (2011): 673–702. http://dx.doi.org/10.1017/s0266466610000472.
Texte intégralRésumé :
This paper considers dynamic time series binary choice models. It proves near epoch dependence and strong mixing for the dynamic binary choice model with correlated errors. Using this result, it shows in a time series setting the validity of the dynamic probit likelihood procedure when lags of the dependent binary variable are used as regressors, and it establishes the asymptotic validity of Horowitz’s smoothed maximum score estimation of dynamic binary choice models with lags of the dependent variable as regressors. For the semiparametric model, the latent error is explicitly allowed to be correlated. It turns out that no long-run variance estimator is needed for the validity of the smoothed maximum score procedure in the dynamic time series framework.
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McCormick, Tyler H., Adrian E. Raftery, David Madigan, and Randall S. Burd. "Dynamic Logistic Regression and Dynamic Model Averaging for Binary Classification." Biometrics 68, no. 1 (2011): 23–30. http://dx.doi.org/10.1111/j.1541-0420.2011.01645.x.
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Wang, Wei-Ping. "Binary-Oscillator Networks: Bridging a Gap between Experimental and Abstract Modeling of Neural Networks." Neural Computation 8, no. 2 (1996): 319–39. http://dx.doi.org/10.1162/neco.1996.8.2.319.
Texte intégralRésumé :
This paper proposes a simplified oscillator model, called binary-oscillator, and develops a class of neural network models having binary-oscillators as basic units. The binary-oscillator has a binary dynamic variable v = ±1 modeling the “membrane potential” of a neuron, and due to the presence of a “slow current” (as in a classical relaxation-oscillator) it can oscillate between two states. The purpose of the simplification is to enable abstract algorithmic study on the dynamics of oscillator networks. A binary-oscillator network is formally analogous to a system of stochastic binary spins (atomic magnets) in statistical mechanics.
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Wilhelm, Thomas. "An elementary dynamic model for non-binary food webs." Ecological Modelling 168, no. 1-2 (2003): 145–52. http://dx.doi.org/10.1016/s0304-3800(03)00207-2.
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Cingara, Aleksandar, Miodrag Jovanovic, and Milan Mitrovic. "Analytical first-order dynamic model of binary distillation column." Chemical Engineering Science 45, no. 12 (1990): 3585–92. http://dx.doi.org/10.1016/0009-2509(90)87161-k.
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Quenet, Brigitte, and David Horn. "The Dynamic Neural Filter: A Binary Model of Spatiotemporal Coding." Neural Computation 15, no. 2 (2003): 309–29. http://dx.doi.org/10.1162/089976603762552933.
Texte intégralRésumé :
We describe and discuss the properties of a binary neural network that can serve as a dynamic neural filter (DNF), which maps regions of input space into spatiotemporal sequences of neuronal activity. Both deterministic and stochastic dynamics are studied, allowing the investigation of the stability of spatiotemporal sequences under noisy conditions. We define a measure of the coding capacity of a DNF and develop an algorithm for constructing a DNF that can serve as a source of given codes. On the basis of this algorithm, we suggest using a minimal DNF capable of generating observed sequences as a measure of complexity of spatiotemporal data. This measure is applied to experimental observations in the locust olfactory system, whose reverberating local field potential provides a natural temporal scale allowing the use of a binary DNF. For random synaptic matrices, a DNF can generate very large cycles, thus becoming an efficient tool for producing spatiotemporal codes. The latter can be stabilized by applying to the parameters of the DNF a learning algorithm with suitable margins.
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Piot, David, Frank Montheillet, and S. Lee Semiatin. "Rheological Behavior of Pure Binary Ni–Nb Model Alloys." Materials Science Forum 638-642 (January 2010): 2700–2705. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.2700.
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This experimental work deals with the influence of niobium additions to high purity nickel on dynamic recrystallization behavior during hot working. Various high-purity alloys were prepared (unalloyed Ni and Ni–0.01, 0.1, 1 and 10 wt % Nb) and deformed to high strains by hot torsion tests to characterize the rheological behavior within the range 800 – 1000°C at strain rates of 0.03, 0.1 and 0.3 s–1. Niobium additions strongly increased the flow stress. To quantify such behavior, the strain-hardening parameter h and dynamic-recovery parameter r in the Yoshie-Laasraoui-Jonas constitutive equation were determined from the initial part of the experimental stress-strain curves (i.e., at strains before the stress peak) in which dynamic recrystallization does not alter the mechanical behavior. A table showing the variation of h and r as a function of strain rate, temperature, and niobium content was compiled and used to fit a simple empirical model for predicting h and r from the deformation conditions and alloy composition. In addition, microstructures were determined by optical metallography and SEM/EBSD. Based on this work, it appears that niobium additions noticeably refine the steady-state grain size by considerably decreasing the kinetics of dynamic recrystallization in nickel.
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Wright, William E. "A Markov chain model for dynamic binary search tree behaviour." International Journal of Computer Mathematics 81, no. 7 (2004): 803–12. http://dx.doi.org/10.1080/00207160410001715311.
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YANG, KAI, and JIANAN XUE. "DYNAMIC RELIABILITY MEASURES AND LIFE DISTRIBUTION MODELS FOR MULTISTATE SYSTEMS." International Journal of Reliability, Quality and Safety Engineering 02, no. 01 (1995): 79–102. http://dx.doi.org/10.1142/s0218539395000083.
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This paper generalizes the dynamic binary state reliability parameters R(t), F(t), λ(t) and MTBF to corresponding dynamic multistate reliability parameter vectors R(t), F(t), λ(t) and M. Then, probability models for system lifetime used on binary state reliability models, such as exponential, Weibull, and other distributions are generalized for multistate models. Continuous time Markov process and Semi-Markov process are used to model the lifetime distribution for multistate system. Multistate reliability measures, such as R(t), F(t), λ(t), M are derived for those multistate reliability models.
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Tuchlenski, Axel, Oliver Schramm, and Andreas Seidel-Morgenstern. "Steady-State and Dynamic Mass Transfer of Gases in Porous Materials." Collection of Czechoslovak Chemical Communications 62, no. 7 (1997): 1043–56. http://dx.doi.org/10.1135/cccc19971043.
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The diffusion of binary gas mixtures through a porous asymmetric tubular membrane has been studied experimentally. A modified Wicke-Kallenbach diffusion cell consisting of two gas compartments separated by the membrane was used. Steady-state experiments with pure gases and binary mixtures were carried out in order to determine the transport parameters of the membrane with respect to the dusty gas model. To verify these parameters, the dynamic transport of binary mixtures was examined applying the dynamic diffusion cell technique proposed by Novak et al. The measured transients were in relative good agreement with the model predictions.
Thèses sur le sujet "Dynamic binary model"
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Hallou, Nabil. "Runtime optimization of binary through vectorization transformations." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S120/document.
Texte intégralRésumé :
Les applications ne sont pas toujours optimisées pour le matériel sur lequel elles s'exécutent, comme les logiciels distribués sous forme binaire, ou le déploiement des programmes dans des fermes de calcul. On se concentre sur la maximisation de l'efficacité du processeur pour les extensions SIMD. Nous montrons que de nombreuses boucles compilées pour x86 SSE peuvent être converties dynamiquement en versions AVX plus récentes et plus puissantes. Nous obtenons des accélérations conformes à celles d'un compilateur natif ciblant AVX. De plus, on vectorise en temps réel des boucles scalaires. Nous avons intégré des logiciels libres pour (1) transformer dynamiquement le binaire vers la forme de représentation intermédiaire, (2) abstraire et vectoriser les boucles fréquemment exécutées dans le modèle polyédrique (3) enfin les compiler. Les accélérations obtenues sont proches du nombre d'éléments pouvant être traités simultanément par l'unité SIMD<br>In many cases, applications are not optimized for the hardware on which they run. This is due to backward compatibility of ISA that guarantees the functionality but not the best exploitation of the hardware. Many reasons contribute to this unsatisfying situation such as legacy code, commercial code distributed in binary form, or deployment on compute farms. Our work focuses on maximizing the CPU efficiency for the SIMD extensions. The first contribution is a lightweight binary translation mechanism that does not include a vectorizer, but instead leverages what a static vectorizer previously did. We show that many loops compiled for x86 SSE can be dynamically converted to the more recent and more powerful AVX; as well as, how correctness is maintained with regards to challenges such as data dependencies and reductions. We obtain speedups in line with those of a native compiler targeting AVX. The second contribution is a runtime auto-vectorization of scalar loops. For this purpose, we use open source frame-works that we have tuned and integrated to (1) dynamically lift the x86 binary into the Intermediate Representation form of the LLVM compiler, (2) abstract hot loops in the polyhedral model, (3) use the power of this mathematical framework to vectorize them, and (4) finally compile them back into executable form using the LLVM Just-In-Time compiler. In most cases, the obtained speedups are close to the number of elements that can be simultaneously processed by the SIMD unit. The re-vectorizer and auto-vectorizer are implemented inside a dynamic optimization platform; it is completely transparent to the user, does not require any rewriting of the binaries, and operates during program execution
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Triampo, Wannapong. "Non-Equilibrium Disordering Processes In binary Systems Due to an Active Agent." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26738.
Texte intégralRésumé :
In this thesis, we study the kinetic disordering of systems
interacting with an agent or a walker. Our studies divide naturally into two
classes: for the first, the dynamics of the walker conserves the total
magnetization of the system, for the second, it does not. These distinct
dynamics are investigated in part I and II respectively.
In part I, we investigate the disordering of an initially
phase-segregated binary alloy due to a highly mobile vacancy which exchanges
with the alloy atoms. This dynamics clearly conserves the total
magnetization. We distinguish three versions of dynamic rules for the
vacancy motion, namely a pure random walk , an ``active' and a biased walk.
For the random walk case, we review and reproduce earlier work by Z.
Toroczkai et. al.,~cite{TKSZ} which will serve as our base-line. To test
the robustness of these findings and to make our model more accessible to
experimental studies, we investigated the effects of finite temperatures
(``active walks') as well as external fields (biased walks). To monitor the
disordering process, we define a suitable disorder parameter, namely the
number of broken bonds, which we study as a function of time, system size
and vacancy number. Using Monte Carlo simulations and a coarse-grained field
theory, we observe that the disordering process exhibits three well
separated temporal regimes. We show that the later stages exhibit dynamic
scaling, characterized by a set of exponents and scaling functions. For the
random and the biased case, these exponents and scaling functions are
computed analytically in excellent agreement with the simulation results.
The exponents are remarkably universal. We conclude this part with some
comments on the early stage, the interfacial roughness and other related
features.
In part II, we introduce a model of binary data corruption induced
by a Brownian agent or random walker. Here, the magnetization is not
conserved, being related to the density of corrupted bits }$
ho ${small .}
{small Using both continuum theory and computer simulations, we study the
average density of corrupted bits, and the
associated density-density correlation function, as well as several other
related quantities. In the second half, we
extend our investigations in three main directions which allow us to make
closer contact with real binary systems. These are i) a detailed analysis of
two dimensions, ii) the case of competing agents, and iii) the cases of
asymmetric and quenched random couplings. Our analytic results are in good
agreement with simulation results. The remarkable finding of this study is
the robustness of the phenomenological model which provides us with the tool,
continuum theory, to understand the nature of such a simple model.<br>Ph. D.
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ROMEO, ISABELLA. "A model for the evaluation of graduates' first long-term job on labour market history." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19391.
Texte intégralRésumé :
The recent theoretical literature on causal inference has built on combined features of earlier work in both econometric structural approach and statistical program evaluation approach. The present work attempts to combine the two approaches proposing a dynamic causal model in the context of a study on the labour market transitions. In such context many statistical articles focus on unemployment and temporary job and their effects on time duration or on probability to get a permanent contract. However in the last decade the concept of job and work stability has changed. The rapid spread of temporary employment and the increased instability of the market has aroused a new concept of work: the work path, which can take place in different sectors and positions and require very different skills and knowledge. In this contest becomes of great interest to define which characteristics are peculiar of a good job and to study the effect of it on the subsequent work path.
Having at disposal administrative panel data on both Lombardy labour market and records of the graduates of three biggest University of Milan, I study the impact of the first “stable” job coherent with the university education on the future job coherence. I define stable a job with a duration of at least 540 days.
A dynamic logit causal model has been performed as it allows to estimate the dynamic effect of the first stable job distinguishing between true and spurious state dependence. The unobserved heterogeneity between subjects is taken into account by considering a latent variable having a discrete distribution. This model under certain hypothesis is equivalent to a model formulated on potential outcomes. For the estimation of the model parameters I use an EM algorithm computing standard errors on the basis of the numerical derivative of the score vector of the complete data log-likelihood.
From the application of the proposed model to the available data I conclude that the first stable job coherent with one's own university degree has a positive causal effect on the future coherence job in the long-term period. The main features that seem to have a significant positive impact on coherence are the subject's ability, measured through the graduation mark, and a short distance from the degree, measured with the number of past experiences.
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Mínguez, Aroca Francisco Dimas. "Computational assessing model based on performance and dynamic assignment of curriculum contents." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/61781.
Texte intégralRésumé :
[EN] The Bologna process encourages the transition of higher education from knowledge possession to understanding performances and from a teaching-centered to a student centered approach via learning outcomes. A student-centered evaluation means that students analyze actively their own learning with concrete criteria on development levels, in an environment where they obtain immediate, frequently and formative feedback.
The rationale of this dissertation consists in introducing the execution of disparate sets of activities into the assessment process in order to enrich the whole procedure keeping it close to the learning process. Continuous assessment seems to be the most accurate mean of executing the assessment process taking into account that competencies are achieved by executing activities.
The evaluation process is implemented throughout a discreet number of measurement points called "moments of evaluation" which consist in a set of activities necessary for the development of the process. And based on the existing partial order relationship among specific curricular domains we could draw a directed graph with several chains of topics representing a natural way of progress in order to reach the profile competences.
We propose a new procedure in continuous assessment by introducing an active/retroactive model, based on the aforementioned chain(s) of topics, which aims to identify those competences that have and those that have not been adequately achieved. With this in mind we suggest introducing a retroactive impact on the outcome assessment of the concerned competencies evaluated in the corresponding chain(s) of topics. These retroactive impacts might be amplified by the introduction of a grade impact amplifier as continuous assessment procedure based on the greater experience and knowledge of the students as the course advances.
In general, any subject is composed by different topics and each topic is developed through the execution, with different relevance, of a number of activities. Relationships between activities, topics and competences can be distributed in a 3D matrix array which we will call ATC cuboid.
ATC cuboid uses a binary assessment as a check of an activity in each of the core competencies. In this way, we have a matrix structure of the performance of the student over a course, which is the basis to design individualized curricular strategies with the goal of achieving the required level of development of each competence.
We will develop the aforementioned ATC cuboids on a sample of students and a comparison between this method and a more traditional method used with Aerospace Engineering students in the Design Engineering School ETSID at Universitat Politècnica de València (Valencia, Spain).<br>[ES] El proceso de Bolonia anima la transición de la educación superior desde un modelo basado en la adquisición del conocimiento a un modelo que prima la comprensión del desempeño y desde un modelo centrado en la enseñanza a un modelo centrado en el estudiante a través de los resultados del aprendizaje. Una evaluación centrada en el alumnado significa que el estudiante analiza activamente su propio aprendizaje con criterios concretos sobre niveles de desarrollo en un entorno donde obtiene feedback de forma inmediata, frecuente y formativa.
El fundamento de esta tesis consiste en la introducción de conjuntos muy diversos de actividades en el proceso de evaluación con el objetivo de enriquecerlo globalmente y acercarlo al proceso de aprendizaje. La evaluación continua se perfila como uno de los medios más precisos de ejecutar el proceso de evaluación teniendo en cuenta que las competencias pueden adquirirse mediante la realización de actividades.
El proceso de evaluación se implementa en una sucesión discreta de puntos de medida que denominamos "momentos de evaluación" y que consisten en un conjunto de actividades que son necesarias para el desarrollo del proceso. Y basándonos en la existencia de una relación de orden parcial entre los distintos contenidos de un dominio curricular, podemos trazar un grafo dirigido con varias cadenas de tópicos que representan, de una forma natural, la progresión del alumnado para alcanzar el perfil de competencias objetivo.
Proponemos un nuevo procedimiento de evaluación continua introduciendo un modelo activo/retroactivo, basado en las cadenas de tópicos antes citadas, que favorece la identificación de aquellas competencias que se han y que no se han alcanzado de una forma adecuada. Con esta idea presente, sugerimos la introducción de un impacto retroactivo sobre los conocimientos base de estas competencias ya evaluados en la(s) correspondiente(s) cadena(s) de tópicos diseñadas. Es más, este impacto retroactivo podría ser más relevante mediante la introducción de un amplificador de impacto calificador como un procedimiento de evaluación continua fundamentado en la mayor experiencia y conocimiento acumulado del alumno conforme avanza el desarrollo del curso.
En general, cualquier asignatura se compone de distintos tópicos y cada tópico se desarrolla mediante la ejecución, con distinta relevancia, de una serie de actividades. Estas relaciones pueden ser representadas mediante matrices de tres dimensiones a las que hemos llamado cuboides ATC, los cuales se implementan mediante el uso de una evaluación binaria que verifica en las actividades cada una de las competencias básicas y las califica con un indicador verdadero/falso obteniendo una estructura matricial del rendimiento del alumnado en el curso, lo que nos permitirá diseñar estrategias curriculares.
Desarrollaremos los mencionados cuboides ATC para una muestra de estudiantes y los compararemos con los resultados obtenidos con un método más tradicional utilizado en el grado de Ingeniería Aeroespacial en la Escuela Técnica Superior de Ingeniería del Diseño, ETSID, en la Universitat Politècnica de València.<br>[CAT] El procés de Bolònia anima la transició de l'educació superior des d'un model basat en l'adquisició del coneixement a un model que prima la comprensió de l'acompliment i des d'un model centrat en l'ensenyament a un model centrat en l'estudiant a través dels resultats de l'aprenentatge. Una avaluació centrada en l'alumne significa que l'estudiant analitza activament el seu propi aprenentatge amb criteris concrets sobre nivells de desenvolupament en un entorn on obté feedback de forma immediata, freqüent i formativa.
El fonament d'aquesta tesi consisteix en la introducció de conjunts molt diversos d'activitats en el procés d'avaluació amb l'objectiu d'enriquir-lo globalment i apropar-lo al procés d'aprenentatge. L'avaluació contínua es perfila com un dels mitjans més precisos d'executar el procés d'avaluació tenint en compte que les competències es poden adquirir mitjançant la realització d'activitats.
El procés d'avaluació s'implementa en una successió discreta de punts de mesura que denominem "moments d'avaluació" i que consisteixen en un conjunt d'activitats que són necessàries per al desenvolupament del procés. I basant-nos en l'existència d'una relació d'ordre parcial entre els diferents continguts d'un domini curricular, podem traçar un graf dirigit amb diverses cadenes de tòpics que representen, d'una forma natural, la progressió de l'alumne per assolir el perfil de competències objectiu.
Proposem un nou procediment d'avaluació contínua introduint-hi un model actiu/retroactiu, basat en les cadenes de tòpics abans esmentades, que afavoreix la identificació d'aquelles competències que s'han assolit i també de les que no s'han assolit d'una manera adequada. Amb aquesta idea present, suggerim la introducció d'un impacte retroactiu sobre els coneixements base d'aquestes competències ja avaluats en la(les) corresponent(-s) cadena(-es) de tòpics dissenyades. I encara més, aquest impacte retroactiu podria ser més rellevant mitjançant la introducció d'un amplificador d'impacte qualificador com un procediment d'avaluació contínua fonamentat en la major experiència i coneixement acumulat de l'alumne a mesura que avança el desenvolupament del curs.
En general, qualsevol assignatura es compon de diferents tòpics i cada tòpic es desenvolupa mitjançant l'execució, amb diferent rellevància, d'una sèrie d'activitats. Aquestes relacions entre activitats, tòpics i competències poden ser representades mitjançant matrius de tres dimensions a les que hem anomenat cuboides ATC.
Els cuboides ATC s'implementen mitjançant l'ús d'una avaluació binària que verifica en les activitats cadascuna de les competències bàsiques i les qualifica amb un indicador veritable/fals. Així, obtenim una estructura matricial del rendiment de l'alumne en el curs, la qual cosa ens permetrà dissenyar estratègies curriculars individualitzades adaptades a les necessitats particulars de cada estudiant amb l'objectiu que assoleixin el nivell requerit en cadascuna de les competències.
Desenvoluparem els esmentats cuboides ATC per a una mostra d'estudiants i els compararem amb els resultats obtinguts amb un mètode més tradicional utilitzat en el grau d'Enginyeria Aeroespacial a l'Escola Tècnica Superior d'Enginyeria del Disseny, ETSED, a la Universitat Politècnica de València.<br>Mínguez Aroca, FD. (2016). Computational assessing model based on performance and dynamic assignment of curriculum contents [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/61781<br>TESIS
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Flick, Jason. "Evaluating the Impact of OOCEA's Dynamic Message Signs (DMS) on Travelers' Experience Using a Pre and Post-Deployment Survey." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3030.
Texte intégralRésumé :
The purpose of this thesis was to evaluate the impact of dynamic message signs (DMS) on the Orlando-Orange County Expressway Authority (OOCEA) toll road network using a Pre and Post-Deployment DMS Survey (henceforth referred to as "pre and post-deployment survey") analysis. DMS are electronic traffic signs used on roadways to give travelers information about travel times, traffic congestion, accidents, disabled vehicles, AMBER alerts, and special events. The particular DMS referred to in this study are large rectangular signs installed over the travel lanes and these are not the portable trailer mount signs. The OOCEA have been working over the past two years to add several fixed DMS on their toll road network. At the time of the pre-deployment survey, only one DMS was installed on the OOCEA toll road network. At the time of the post-deployment survey, a total of 30 DMS were up and running on the OOCEA toll road network. Since most of the travelers on the OOCEA toll roads are from Orange, Osceola, and Seminole counties, this study was limited to these counties. This thesis documents the results and comparisons between the pre and post-deployment survey analysis. The instrument used to analyze the travelers' perception of DMS was a survey that utilized computer aided telephone interviews. The pre-deployment survey was conducted during early November of 2006, and the post-deployment survey was conducted during the month of May, 2008. Questions pertaining to the acknowledgement of DMS on the OOCEA toll roads, satisfaction with travel information provided on the network, formatting of the messages, satisfaction with different types of messages, diversion questions (Revealed and Stated preferences), and classification/socioeconomic questions (such as age, education, most traveled toll road, county of residence, and length of residency) were asked to the respondents. The results of both the pre and post-deployment surveys are discussed in this thesis, but it should be noted that the more telling results are those of the post-deployment survey. The results of the post-deployment survey show the complete picture of the impact of DMS on travelers' experience on the OOCEA toll road network. The pre-deployment results are included to show an increase or decrease in certain aspects of travel experience with relation to DMS. The results of the pre-deployment analysis showed that 54.4% of the OOCEA travelers recalled seeing DMS on the network, while a total of 63.93% of the OOCEA travelers recalled seeing DMS during the post-deployment analysis. This showed an increase of almost 10% between the two surveys demonstrating the people are becoming more aware of DMS on the OOCEA toll road network. The respondents commonly agreed that the DMS were helpful for providing information about hazardous conditions, and that the DMS are easy to read. Also, upon further research it was found that between the pre and post-deployment surveys the travelers' satisfaction with special event information provided on DMS and travel time accuracy on DMS increased significantly. With respect to formatting of the DMS, the following methods were preferred by the majority of respondents in both the pre and post-deployment surveys: • Steady Message as a default DMS message format • Flashing Message for abnormal traffic information (94% of respondents would like to be notified of abnormal traffic information) • State road number to show which roadway (for Colonial – SR 50, Semoran – SR 436 and Alafaya – SR 434) • "I-Drive" is a good abbreviation for International Drive • If the distance to the international airport is shown on a DMS it thought to be the distance to the airport exit The results from the binary logit model for "satisfaction with travel information provided on OOCEA toll road network" displayed the significant variables that explained the likelihood of the traveler being satisfied. This satisfaction model was based on respondents who showed a prior knowledge of DMS on OOCEA toll roads. With the use of a pooled model (satisfaction model with a total of 1775 responses – 816 from pre-deployment and 959 from post-deployment), it was shown that there was no statistical change between the pre and post-deployment satisfaction based on variables thought to be theoretically relevant. The results from the comparison between the pre and post-deployment satisfaction models showed that many of the coefficients of the variables showed a significant change. Although some of the variables were statistically insignificant in one of the two survey model results: Either the pre or post-deployment model, it was still shown that every variable was significant in at least one of the two models. The coefficient for the variable corresponding to DMS accuracy showed a significantly lower value in the post-deployment model. The coefficient for the variable "DMS was helpful for providing special event information" showed a significantly higher value in the post-deployment model. The final post-deployment diversion model was based on a total of 732 responses who answered that they had experienced congestion in the past 6 months. Based on this final post-deployment diversion model, travelers who had stated that their most frequently traveled toll road was either SR 408 or SR 417 were more likely to divert. Also, travelers who stated that they would divert in the case of abnormal travel times displayed on DMS or stated that a DMS influenced their response to congestion showed a higher likelihood of diversion. These two variables were added between the pre and post-deployment surveys. It is also beneficial to note that travelers who stated they would divert in a fictitious congestion situation of at least 30 minutes of delay were more likely to divert. This shows that they do not contradict themselves in their responses to Revealed Preference and Stated Preference diversion situations. Based on a comparison between pre and post-deployment models containing similar variables, commuters were more likely to stay on the toll road everything else being equal to the base case. Also, it was shown that in the post-deployment model the respondents traveling on SR 408 and SR 417 were more likely to divert, but in the pre-deployment model only the respondents traveling on SR 408 were more likely to divert. This is an expected result since during the pre-deployment survey only one DMS was located on SR 408, and during the post-deployment survey there were DMS located on all toll roads. Also, an interesting result to be noted is that in the post-deployment survey, commuters who paid tolls with E-pass were more likely to stay on the toll road than commuters who paid tolls with cash. The implications for implementation of these results are discussed in this thesis. DMS should be formatted as a flashing message for abnormal traffic situations and the state road number should be used to identify a roadway. DMS messages should pertain to information on roadway hazards when necessary because it was found that travelers find it important to be informed on events that are related to their personal safety. The travel time accuracy on DMS was shown to be significant for traveler information satisfaction because if the travelers observe inaccurate travel times on DMS, they may not trust the validity of future messages. Finally, it is important to meet the travelers' preferences and concerns for DMS.<br>M.S.C.E.<br>Department of Civil and Environmental Engineering<br>Engineering and Computer Science<br>Civil Engineering MS
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McDonald, Jennifer Mary. "Building a model for binary star formation : the separate nuclei hypothesis revisited." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387669.
Texte intégral
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Silvestri, Luciano Germano. "TheDynamical Structure Functions of Strongly Coupled Binary Charged Systems:." Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108386.
Texte intégralRésumé :
Thesis advisor: Gabor J. Kalman<br>Mixtures of charged particles, where the components have different charge numbers (Z_A ), masses (m_A ) and densities (n_A ), with A = 1, 2 denoting the components, occur in Nature in a great variety. To be sure, even the simplest plasmas are necessarily multicomponent systems, consisting of negative and positive charges. This feature is, however, obscured within the centrally important and popular OCP (one component plasma) or jellium models, where the role of one of the components is reduced to providing a neutralizing background. When this background is inert, one is led to the Coulomb OCP model, while when the background is polarizable (such as an electron gas surrounding heavy particles), to a Yukawa OCP (YOCP), with a screened Yukawa potential replacing the Coulomb potential between the dynamically active particles. There are, however situations of physical importance, where the OCP description is inadequate and a genuine two component description of a plasma composed of two species is required. This Thesis focuses on the study of the dynamics of many-body systems consisting of two components of like charges (all the Z_A -s being of the same signature) in a neutralizing background. The methodology is based upon parallel attacks through theoretical analysis and Molecular Dynamics (MD) simulations, the latter yielding the capability of instant verification of the former. The investigation involves the study of the partial (i.e. species by species) structure functions S_AB (k, ω) and current-current correlation functions L_AB (k, ω). The Fluctuation–Dissipation Theorem (FDT) con- nects these quantities to the total and partial response functions χ_AB (k, ω) (matrices in species space), which are instrumental in the description of the collective mode excitations of the system. This analysis has revealed an entirely novel feature: both S_11 (k, ω) and S_22 (k, ω) exhibit very sharp and deep (several orders of magnitude) minima in the strongly coupled liquid phase at robust characteristic frequencies of the system, which are virtually coupling independent. The FDT then demands that these anti-resonances show up as well in the imaginary part of the partial density response function χ_AB (k, ω). Our theoretical analysis, based on the Quasi-Localized Charge Approximation (QLCA), has confirmed that this is indeed the case. These anti-resonant frequencies being related to the dissipative part of the response, require a physical description of the principal source of dissipation. This has been identified as the inter-species momentum transfer, governed by drag between the microscopic current fluctuations of the two species. The description of this effect was incorporatedv in the QLCA formalism, making it possible to derive a closed analytic representation of the fluctuation spectra in the frequency domain of interest and compare them with the results of the MD simulations. Other important novel concepts, such as the idea of coupling dependent effective mass, fast vs. slow sound, the mechanism of tran- sition from short-range to long-range interaction have been identified and analyzed. Furthermore, the investigation of the dynamics has led to the first comprehensive description of the mode structures of classical binary Coulomb and Yukawa mixtures at arbitrary coupling values, which has been a longstanding problem in statistical plasma physics. Focusing on the longitudinal excitations, we describe the transition from weak coupling (where one is acquainted with the RPA result yielding only the single plasmon mode in the Coulomb case or a single acoustic mode in the Yukawa case) to strong coupling, with a doublet of modes that arise from the complex rel- ative motion between the two components, as affected by the interaction with the background<br>Thesis (PhD) — Boston College, 2019<br>Submitted to: Boston College. Graduate School of Arts and Sciences<br>Discipline: Physics
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BERNASCONI, DAVIDE PAOLO. "Dynamic prediction in survival analysis with binary non-reversible time-dependent treatment indicator." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2015. http://hdl.handle.net/10281/76772.
Texte intégralRésumé :
Negli studi clinici spesso è di interesse confrontare la sopravvivenza di pazienti appartenenti a due o più gruppi di trattamento. In alcune situazioni, la classificazione non è effettuata all’inizio del follow-up ma cambia nel tempo. Ad esempio, tutti i pazienti sono sottoposti ad un trattamento iniziale ed alcuni lo continuano mentre altri cambiano dopo un certo periodo di tempo. In questo caso il trattamento è rappresentato da una variabile binaria tempo-dipendente. Un contesto tipico è il confronto tra chemioterapia e trapianto di cellule staminali nella Leucemia Linfoblastica Acuta. In questa situazione, il metodo Kaplan-Meier non è utilizzabile in quanto affetto da immortal time bias.
Due approcci non-parametrici alternativi sono stati proposti in letteratura. Andersen et al. (1983) suggeriscono di classificare i pazienti ad un tempo “landmark” che corrisponde al punto iniziale della stima della curva di sopravvivenza, includendo solo i pazienti ancora a rischio al landmark. Il secondo metodo, proposto da Simon e Makuch (1984), consiste nell’aggiornamento dinamico dei “risk sets” dei due gruppi di trattamento tempo-dipendenti. Entrambi i metodi sono stati presentati in maniera euristica e senza specificare le quantità teoriche che corrispondono agli stimatori proposti. Perciò, l’interpretazione delle curve stimate dai due metodi non è mai stata chiarita.
Quando l’interesse non è rivolto alla sopravvivenza globale ma alla predizione profilo-specifica, ovvero tenendo conto delle caratteristiche individuali dei soggetti, occorre utilizzare metodi di regressione parametrici o semi-parametrici. Il modello di Cox è quello più popolare ma in presenza di effetti tempo-dipendenti e/o di covariate tempo-dipendenti non può essere utilizzato per ottenere delle curve.
Tra le possibili alternative sono stati considerati il modello parametrico di Hanley e Miettinen (2009) e il modello di regressione semi-parametrico basato sul landmark di Van Houwelingen (2007). Il primo è basato sulla stima della funzione azzardo nel tempo applicando una regressione logistica ad un dataset esteso creato dalla suddivisione del tempo di sopravvivenza osservato di ciascun soggetto in un certo numero di unità di tempo e trattando il numero di eventi in ogni singolo intervallo di tempo come una variabile casuale Binomiale. Il secondo metodo scaturisce dall’idea di utilizzare il modello di Cox su molteplici partizioni del dataset ciascuna creata partendo da un tempo landmark progressivo e includendo solo i soggetti a rischio al landmark; la classificazione del trattamento per questi pazienti è fissata a quel tempo consentendo di aggiornare dinamicamente il valore delle covariate tempo-dipendenti in ciascun modello e permettendo ai coefficienti stimati di variare nel tempo.
Gli scopi del presente lavoro sono la revisione e lo sviluppo di metodi per: 1) descrivere la sopravvivenza in funzione di un covariata binaria tempo-dipendente sia da una prospettiva fissa sia dinamicamente nel tempo; 2) la valutazione dell’impatto su queste quantità dei fattori prognostici, in particolare il tempo di attesa al trapianto, utilizzando dei parametri interpretabili; 3) lo sviluppo di predizioni profilo-specifiche.
Nella prima parte del lavoro si intende chiarire il significato delle le quantità teoriche stimate dai metodi landmark e Simon e Makuch. In aggiunta, si presenta un approccio innovativo basato su domande controfattuali e predizione dinamica, verificando la validità dei risultati attraverso delle simulazioni. Nella seconda parte, si presentano i modelli di regressione di Hanley-Miettinen e del landmark e si mostra come utilizzarli per ottenere la stima dell’effetto del tempo i attesa al trapianto e per produrre delle predizioni profilo-specifiche su dati reali inerenti a pazienti affetti da Leucemia Linfoblastica Acuta, confrontando la performance dei modelli attraverso delle simulazioni.<br>In clinical studies it is often of interest to compare the survival experience of patients in two or more treatment groups. In some situations the categorization is not fixed at baseline but changes during the follow-up, where patients, for example, start from an initial treatment and either continue it or switch to an alternative one after some time (waiting time). Thus, treatment is a binary non reversible time-dependent variable. A typical problem is comparing outcomes of chemotherapy vs stem-cell transplantation in Acute Lymphoblastic Leukemia (ALL) where patients are treated initially with chemotherapy and during the follow-up they can receive bone marrow transplant. In this context, the standard Kaplan-Meier method is unreliable since it is affected by the immortal time bias.
Two alternative non-parametric approaches were proposed in the literature. Andersen et al. (1983) suggests to classify patients at a landmark time which corresponds to the starting point for the estimation of the Kaplan-Meier survival curve, involving only patients still at risk at the landmark. The second, proposed by Simon and Makuch (1984), consists in dynamically updating in time the risk set of the two time-dependent treatment groups. Both methods were presented mostly relying on heuristic bases and without specifying the theoretical quantities corresponding to the proposed estimators. Thus, the interpretations of the curves estimated by the two methods was never clarified.
When the focus is not on the overall survival experience but rather on profile-specific prediction, i.e. accounting for the individual characteristics of the subjects, one must resort to semi-parametric or parametric regression models. The Cox model is the most popular one but in the presence of time-varying effects and/or time-dependent covariates it cannot be used to obtain survival curves.
Among the possible alternatives we considered the full parametric model by Hanley and Miettinen (2009) and the semi-parametric landmark regression model by Van Houwelingen (2007). The first is based on estimating the hazard function over time by applying a logistic regression to an expanded dataset created by splitting the observed survival time of each subject into a number of time-units and to treat the number of events in every single interval as a Binomial random variable. The second originates from the idea of fitting the Cox model to multiple subsets of data, each one created starting from a sliding landmark time point and including only the subjects at risk at the landmark; the treatment classification for these patients is frozen at that time allowing to dynamically update the time-dependent covariates in each model and to let the parameter estimates to vary in time.
The aims of the dissertation are reviewing and developing methods for: 1) the description of the survival experience according to a binary time-dependent treatment indicator both from a fixed perspective and dynamically update in time; 2) the assessment of the impact on these quantities of prognostic factors, in particular the waiting time to transplant, through interpretable parameters; 3) the development of profile-specific predictions.
In the first part of this work we wish to clarify the theoretical quantities estimated by the landmark and Simon-Makuch methods. In addition, we present a novel approach based on counterfactual questions and dynamic prediction, checking the validity of our findings using simulations. In the second part, we review the Hanley-Miettinen and landmark regression models and we show how to use them to properly estimate the effect of waiting time to transplant and to make profile-specific dynamic predictions on a real dataset on ALL, comparing the performance of the two models using simulations.
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Chakrabarti, Dwaipayan. "Slow Dynamics In Soft Condensed Matter : From Supercooled Liquids To Thermotropic Liquid Crystals." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/292.
Texte intégralRésumé :
This thesis, which contains fourteen chapters in two parts, presents theoretical and computer simulation studies of dynamics in supercooled liquids and thermotropic liquid crystals. These two apparently diverse physical systems are unified by a startling similarity in their complex slow dynamics. Part I consists of six chapters on supercooled liquids while Part II comprises seven chapters on thermotropic liquid crystals. The fourteenth chapter provides a concluding note.
Part I starts with an introduction to supercooled liquids given in chapter 1. This chapter discusses basic features of supercooled liquids and the glass transition and portrays some of the theoretical frameworks and formalisms that are widely recognized to have contributed to our present understanding.
Chapter 2 introduces a new model of binary mixture in order to study dynamics across the supercooled regime. The system consists of an equimolar mixture of the Lennard-Jones spheres and the Gay-Berne ellipsoids of revolution, and thus one of its components has orientational degrees of freedom (ODOF). A decoupling between trans-lational diffusion and rotational diffusion is found to occur below a temperature where the second rank orientational correlation time starts showing a steady deviation from the Arrhenius temperature behavior. At low temperatures, the optical Kerr effect (OKE) signal derived from the system shows a short-to-intermediate time power law decay with a very weak dependence on temperature, if at all, of the power law exponent as has been observed experimentally. At the lowest temperature investigated, jump motion is found to occur in both the translational and orientational degrees of freedom.
Chapter 3 studies how the binary mixture, introduced in the previous chapter, explores its underlying potential energy landscape. The study reveals correlations between the decoupling phenomena, observed almost universally in supercooled molecular liquids, and the manner of exploration of the energy landscape of the system. A significant deviation from the Debye model of rotational diffusion in the dynamics of ODOF is found to begin at a temperature at which the average inherent structure energy of the system starts falling as the temperature decreases. Further, the coupling between rotational diffusion and translational diffusion breaks down at a still lower temperature, where a change occurs in the temperature dependence of the average inherent structure energy.
Chapters 4-6 describe analytical and numerical approaches to solve kinetic models of glassy dynamics for various observables. The β process is modeled as a thermally activated event in a two-level system and the a process is described as a β relaxation mediated cooperative transition in a double-well. The model resembles a landscape picture, conceived by Stillinger [Science 267, 1935 (1995)], where the a process is assumed to involve a concerted series of the β processes, the latter being identified as elementary relaxations involving transitions between contiguous basins. For suitable choice of parameter values, the model could reproduce many of the experimentally observed features of anomalous heat capacity behavior during a temperature cycle through the glass transition as described in chapter 4. The overshoot of the heat capacity during the heating scan that marks the glass transition is found to be caused by a delayed energy relaxation. Chapter 5 shows that the model can also predict a frequency dependent heat capacity that reflects the two-step relaxation behavior. The high-frequency peak in the heat capacity spectra appears with considerably larger amplitude than the low-frequency peak, the latter being due to the a relaxation. The model, when simplified with a modified description of the a process that involves an irreversible escape from a metabasin, can be solved analytically for the relaxation time. This version of the model captures salient features of the structural relaxation in glassy systems as described in chapter 6.
In Part II, thermotropic liquid crystals are studied in molecular dynamics simulations using primarily the family of the Gay-Berne model systems. To start with, chapter 7 provides a brief introduction to thermotropic liquid crystals, especially from the perspective of the issues discussed in the following chapters. This chapter ends up with a detail description of the family of the Gay-Berne models.
Chapter 8 demonstrates that a model system for calamitic liquid crystal (comprising rod-like molecules) could capture the short-to-intermediate time power law decay in the OKE signal near the isotropic-nematic (I-N) phase transition as observed experimentally. The single-particle second rank orientational time correlation function (OTCF) for the model liquid crystalline system is also found to sustain a power law decay regime in the isotropic phase near the I-N transition. On transit across the I-N phase boundary, two power law decay regimes, separated by a plateau, emerge giving rise to a step-like feature in the single-particle second rank OTCF. When the time evolution of the rotational non-Gaussian parameter is monitored as a diagnostic of spatially heterogeneous dynamics, a dominant peak is found to appear following a shoulder at short times, signaling the growth of pseudonematic domains. These observations are compared with those relevant ones obtained for the supercooled binary mixture, as discussed in chapter 2, in the spirit of the analogy suggested recently by Fayer and coworkers [J. Chem. Phys. 118, 9303 (2003)].
In chapter 9, orientational dynamics across the I-N transition are investigated in a variety of model systems of thermotropic liquid crystals. A model discotic system that consists of disc-like molecules as well as a lattice system have been considered in the quest of a universal short-to-intermediate time power law decay in orientational relaxation, if any. A surprisingly general power law decay at short to intermediate times in orientational relaxation is observed in all these systems. While the power law decay of the OKE signal has been recently observed experimentally in calamitic systems near the I-N phase boundary and in the nematic phase by Fayer and coworkers [J. Chem. Phys. 116, 6339 (2002), J. Phys. Chem. B 109, 6514 (2005)], the prediction for the discotic system can be tested in experiments.
Chapter 10 presents the energy landscape view of phase transitions and slow dynamics in thermotropic liquid crystals by determining the inherent structures of a family of one-component Gay-Berne model systems. This study throws light on the interplay between the orientational order and the translational order in the mesophases the systems exhibit. The onset of the growth of the orientational order in the parent phase is found to induce a translational order, resulting in a smectic-like layer in the underlying inherent structures. The inherent structures, surprisingly, never seem to sustain orientational order alone if the parent nematic phase is sandwiched between the high-temperature isotropic phase and the low-temperature smectic phase. The Arrhenius temperature dependence of the orientational relaxation time breaks down near the I-N transition and this breakdown is found to occur at a temperature below which the system explores increasingly deeper potential energy minima. There exists a remarkable similarity in the manner of exploration of the potential energy landscape between the Gay-Berne systems studied here and the well known Kob-Andersen binary mixture reported previously [Nature, 393, 554 (1998)].
In search of a dynamical signature of the coupling between orientational order and translational order, anisotropic translational diffusion in the nematic phase has been investigated in the Gay-Berne model systems as described in chapter 11. The translational diffusion coefficient parallel to the director D// is found to first increase and then decrease as the temperature drops through the nematic phase. This reversal occurs where the smectic order parameter of the underlying inherent structures becomes significant for the first time. The non-monotonic temperature behavior of D// can thus be viewed from an energy landscape analysis as a dynamical signature of the coupling between orientational and translational order at the microscopic level. Such a view is likely to form the foundation of a theoretical framework to explain the anisotropic translation diffusion.
Chapter 12 investigates the validity of the Debye model of rotational diffusion near the I-N phase boundary with a molecular dynamics simulation study of a Gay-Berne model system for calamitic liquid crystals. The Debye model is found to break down near the I-N phase transition. The breakdown, unlike the one observed in supercooled molecular liquids where a jump diffusion model is often invoked, is attributed to the growth of orientational pair correlation. A mode-coupling theory analysis is provided in support of the explanation.
Chapter 13 presents a molecular dynamics study of a binary mixture of prolate ellipsoids of revolution with different aspect ratios interacting with each other through a generalized Gay-Berne potential. Such a study allows to investigate directly the aspect ratio dependence of the dynamical behavior.
In the concluding note, chapter 14 starts with a brief summary of the outcome of the thesis and ends up with suggestion of a few relevant problems that may prove worthwhile to be addressed in future.
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Rao, Balappa Shrisha. "Fine structure in cortical connectivity : effects on network dynamics and function Dynamics and orientation selectivity in a cortical model of rodent V1 with excess bidirectional connections Theory of orientation selectivity in random binary networks." Thesis, Sorbonne Paris Cité, 2018. https://wo.app.u-paris.fr/cgi-bin/WebObjects/TheseWeb.woa/wa/show?t=2401&f=17357.
Texte intégralRésumé :
Pas de résumé<br>The local cortical network connectivity significantly deviates from a random network, giving rise to fine structure at the neuron-to-neuron level. In this study, we have investigated the effects of these fine structures on network dynamics and function. We have investigated two types of fine structure, namely, excess bidirectionality and feature specific connectivity. The study of the effects of excess bidirectionality was conducted in a conductance-based model of layer 2/3 in rodent V1. Through large scale numerical simulations, we showed that excess bidirectional connections in the inhibitory population leads to slower dynamics. Remarkably, we found that bidirectional connections between inhibitory cells are more efficacious in slowing down the dynamics than those between the excitatory cells. Additionally, bidirectional connections between inhibitory cells increases the trial-to-trial variability, while between the excitatory and inhibitory populations it reduces the variability leading to improved coding efficiency. Our results suggest that the strong reciprocal connections between excitatory and PV+ cells that have been experimentally reported can improve coding efficiency by reducing the signal-to-noise ratio. The second part of this work involved an analytical study of a model of layer 2/3 rodent V1 with binary neurons. In our study, we assumed that neurons in layer 4 were selective to stimuli orientation. Our results account for the changes in tuning properties observed during the critical period in mouse V1. Prior to the critical period, the connectivity between pyramidal neurons in the mouse V1 is non-specific. Following previous studies of spiking networks, we analytically demonstrated that with such connectivity, layer 2/3 neurons in our model develop orientation selectivity. A small fraction of strong feature specific connections between pyramidal cells have been reported in the mouse V1 after the critical period. We showed that, in spite of their small number, such connections can substantially impact the tuning of layer 2/3 cells to orientation: excitatory neurons become more selective and through non-specific global changes in their synaptic strengths, the inhibitory cells become more broadly tuned
Livres sur le sujet "Dynamic binary model"
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Folawewo, Abiodun O., and Olusegun A. Orija. Informal–formal workers' transition in Nigeria: A livelihood analysis. UNU-WIDER, 2020. http://dx.doi.org/10.35188/unu-wider/2020/903-7.
Texte intégralRésumé :
This study evaluates the effects of the informal sector on Nigerian workers’ livelihoods and analyses workers’ transitions within the informal sector and between informal and formal employment. A binary logit model is applied to General Household Survey panel data for the periods 2010/11, 2012/13, and 2015/16. We find that informal employment has the greatest impact on workers’ livelihoods in terms of earnings. Results also indicate the existence of a high level of dynamic transition of workers within different types of informal employment. Our results further indicate that both self-employed and wage employed informal workers are likely to transit to formal employment, the likelihood being higher for the upper-tier informal wage employed. While informally employed workers have a very high chance of transiting to formal employment, formal workers have a much lower chance of transiting to informal employment. The policy implication of our results is the need to create better working conditions for informal workers.
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Ophir, Adi, and Ishay Rosen-Zvi. Nokhri, Ger, and the Art of Separation in the Hebrew Bible. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198744900.003.0002.
Texte intégralRésumé :
This chapter traces the developments of various terms denoting “others” in biblical literature. In much of the biblical corpus, Israel is still one goy among many, and the difference between it and its Others is neither binary nor stable. After a brief analysis of the dynamics of familial and ethnwic separations in Genesis and Exodus, this chapter concentrates on the priestly and Deuteronomistic modes of separating peoples, examines the novelty and limitedness of the Deuteronomistic legislation, where the nokhri (stranger) is systematically contrasted for the first time with the Israelite (referred to as “your brother”), and follows the various modes of separations and their rationales.
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Rahilly, Elizabeth. Trans-Affirmative Parenting. NYU Press, 2020. http://dx.doi.org/10.18574/nyu/9781479820559.001.0001.
Texte intégralRésumé :
In a world that is responding to ever-changing ideas and expressions of gender, this book adds new insights on transgender children and the parents who support them. Drawing on in-depth interview data with more than fifty parents, the book examines parents’ shifting understandings of their children’s gender and how they come to help their children make sense of their identities and their bodies. Throughout these processes, the book shows that parents’ meaning-making and decision-making often challenge LGBT rights discourses, as well as queer political tenets, in unexpected ways. These dynamics surface in three key areas: (1) gender and sexuality, (2) the gender binary, and (3) the body. Throughout parents’ understandings, gender identity and sexual orientation do not always present as radically separate aspects of the self, but are more fluid and open to reconsideration, given new cultural contexts, opportunities, and phases of the life course. And despite increasing cultural visibility around nonbinary identities, “gender-expansive” child-rearing often looks, fundamentally, very binary and gender-stereotypical, per the children’s own assertions and expressions. Lastly, parents often utilize highly medicalized understandings of transgender embodiment, which nevertheless resonate with some children’s sensibilities. Altogether, these families depart from conventional understandings of gender, sexuality, and the binary, but in ways that prioritize child-centered shifts, meanings, and parenting models, not necessarily LGBTQ politics or paradigms. This marks new ground for understanding the mechanisms and parameters of the (trans)gender change afoot.
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Anderson, Crystal S. Soul in Seoul. University Press of Mississippi, 2020. http://dx.doi.org/10.14325/mississippi/9781496830098.001.0001.
Texte intégralRésumé :
Soul in Seoul: African American Popular Music and K-pop examines how K-pop cites musical and performative elements of Black popular music culture as well as the ways that fans outside of Korea understand these citations. K-pop represents a hybridized mode of Korean popular music that emerged in the 1990s with global aspirations. Its hybridity combines musical elements from Korean and foreign cultures, particularly rhythm and blues-based genres (R&B) of African American popular music. Korean pop, R&B and hip-hop solo artists and groups engage in citational practices by simultaneously emulating R&B’s instrumentation and vocals and enhancing R&B by employing Korean musical strategies to such an extent that K-pop becomes part of a global R&B tradition. Korean pop groups use dynamic images and quality musical production to engage in cultural work that culminates the kind of global form of crossover pioneered by Black American music producers. Korean R&B artists, with a focus on vocals, take the R&B tradition beyond the Black-white binary, and Korean hip-hop practitioners use sampling and live instrumentation to promote R&B’s innovative music aesthetics. K-pop artists also cite elements of African American performance in Korean music videos that disrupt limiting representations. K-pop’s citational practices reveal diverse musical aesthetics driven by the interplay of African American popular music and Korean music strategies. As a transcultural fandom, global fans function as part of K-pop’s music press and deem these citational practices authentic. Citational practices also challenge homogenizing modes of globalization by revealing the multiple cultural forces that inform K-pop.
Chapitres de livres sur le sujet "Dynamic binary model"
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Righi, Riccardo. "Information Flow Simulations in Multi-dimensional and Dynamic Systems." In Communications in Computer and Information Science. Springer Nature Switzerland, 2022. http://dx.doi.org/10.1007/978-3-031-23929-8_22.
Texte intégralRésumé :
AbstractThe relevance of nodes with respect to the position they have in a network is often investigated with centrality measures. In particular, in cases where it is specifically meaningful to consider nodes’ ability to cumulate and convey information, like in economic systems, betweenness centrality is one of the most pertinent options because of its underlying concept. However, this statistic presents two limitations. First, as it relies on the computation of shortest paths, it is grounded on a binary topological evaluation: every time a node is not located in the shortest path between two other nodes, it gains no score at all in its centrality (even if it is located on a path just one step longer). Second, betweenness centrality does not allow the direct analysis of multi-dimensional and dynamic networks: it has to be computed one dimension and one instant at a time, and this causes problems of comparability in case of weighted connections. The scope and the originality of this work is to design a network model that makes it possible to solve these issues. The proposed Dynamic Multi-Layer Network (DMLN) allows the structural representation of the multi-dimensional and dynamic properties of nodes’ interactions. Then, this allows the computation of a metric that, based on Infomap random walks, assesses the level of information cumulated and conveyed by nodes in any moment and in any dimension of interaction. Importantly, this is performed without relying on a binary evaluation, and by jointly taking into account what occurred in all the dimensions and during the entire period, in which the system is observed. We present and discuss an implementation based on ICT worldwide trade of goods and services in the period 2004–2014.
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Herkersdorf, Andreas, Michael Engel, Michael Glaß, et al. "RAP Model—Enabling Cross-Layer Analysis and Optimization for System-on-Chip Resilience." In Dependable Embedded Systems. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52017-5_1.
Texte intégralRésumé :
AbstractThe Resilience Articulation Point (RAP) model aims to provision a probabilistic fault abstraction and error propagation concept for various forms of variability related faults in deep sub-micron CMOS technologies at the semiconductor material or device levels. RAP assumes that each of such physical faults will eventually manifest as a single- or multi-bit binary signal inversion or out-of-specification delay in a signal transition between bit values. When probabilistic error functions for specific fault origins are known at the bit or signal level, knowledge about the unit of design and its environment allow the transformation of the bit-related error functions into characteristic higher layer representations, such as error functions for data words, finite state machine (FSM) states, IP macro-interfaces, or software variables. Thus, design concerns can be investigated at higher abstraction layers without the necessity to further consider the full details of lower levels of design. This chapter introduces the ideas of RAP based on examples of particle strike, noise and voltage drop induced bit errors in SRAM cells. Furthermore, we show by different examples how probabilistic bit flips are systematically abstracted and propagated towards instruction and data vulnerability at MPSoC architecture level, and how RAP can be applied for dynamic testing and application-level optimizations in an autonomous robot scenario.
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Sutradhar, Brajendra C. "Familial Models for Binary Data." In Dynamic Mixed Models for Familial Longitudinal Data. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-8342-8_5.
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Sutradhar, Brajendra C. "Longitudinal Models for Binary Data." In Dynamic Mixed Models for Familial Longitudinal Data. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-8342-8_7.
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Sutradhar, Brajendra C. "Familial Longitudinal Models for Binary Data." In Dynamic Mixed Models for Familial Longitudinal Data. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-8342-8_11.
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Sutradhar, Brajendra C. "Longitudinal Mixed Models for Binary Data." In Dynamic Mixed Models for Familial Longitudinal Data. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-8342-8_9.
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Ganikhodjaev, Nasir, Seyit Temir, Selman Uğuz, and Hasan Akin. "A Renormalization-Group Study of the Potts Model with Competing Ternary and Binary Interactions." In Nonlinear and Complex Dynamics. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0231-2_9.
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Potyka, Johanna, Johannes Kromer, Muyuan Liu, Kathrin Schulte, and Dieter Bothe. "Modelling and Numerical Simulation of Binary Droplet Collisions Under Extreme Conditions." In Fluid Mechanics and Its Applications. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09008-0_7.
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AbstractThe complexity of binary droplet collisions strongly increases in case of immiscible liquids with the occurrence of triple lines or for high energetic collisions, where strong rim instabilities lead to the spattering of satellite droplets. To cope with such cases, the Volume of Fluid method is extended by an efficient interface reconstruction, also applicable to multi-material cells of arbitrary configuration, as well as an enhanced continuous surface stress model for accurate surface force computations, also applicable to thin films. For collisions of fully wetting liquids, excellent agreement to experimental data is achieved in different collision regimes. High-resolution simulations predict droplet collisions in the spattering regime and provide detailed insights into the evolution of the rim instability. Another challenge is the numerical prediction of the collision outcome in the bouncing or coalescence region, where the rarefied gas dynamics in the thin gas film determines the collision result. To this end, an important step forward became possible by modelling the pressure in the gas film. With the introduction of an interior collision plane within the flow domain, it is now possible to simulate droplet collisions with gas film thickness reaching the physically relevant length scale.
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Dou, Jie, Hiromitsu Yamagishi, Zhongfan Zhu, Ali P. Yunus, and Chi Wen Chen. "TXT-tool 1.081-6.1 A Comparative Study of the Binary Logistic Regression (BLR) and Artificial Neural Network (ANN) Models for GIS-Based Spatial Predicting Landslides at a Regional Scale." In Landslide Dynamics: ISDR-ICL Landslide Interactive Teaching Tools. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57774-6_10.
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Rjoub, Husam, Chiemelie Benneth Iloka, and Vimala Venugopal. "Changes in the Marketing Orientation Within the Business Model of an International Retailer." In Handbook of Research on Current Trends in Asian Economics, Business, and Administration. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8486-6.ch009.
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Reported in this paper is an interview- and press release-based study that considers the market-driven and market-driving activities within the disaggregated components of a business model. This is based on an empirical study of IKEA in Malaysia over the past 20 years. Market orientation is perceived to be a position on a continuum, not a binary one. The components of the business model employed in this study were developed from Osterwalder and Pigneur. Findings show that over time the balance between driven and driving orientations of the company changed in a number of ways with respect to its business models. This chapter contributes by showing the disaggregated nature of market orientation of driving and driven activities and linking them to a given component of business model as well as reviewing what happened to the driven-driving balance over the course of time. This approach can widely be applied with respect to attempts geared towards understanding the dynamic nature of international retailing.
Actes de conférences sur le sujet "Dynamic binary model"
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Foleiss, Juliano Henrique, Andre Luis Tinassi DAmato, and Anderson Faustino da Silva. "Dynamic Binary Translation -- A Model-Driven Approach." In 2012 31st International Conference of the Chilean Computer Science Society (SCCC). IEEE, 2012. http://dx.doi.org/10.1109/sccc.2012.30.
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Salgado, F., A. Martins, D. Almeida, T. Gomes, J. Monteiro, and A. Tavares. "MODELA DBT: Model-driven elaboration language applied to Dynamic Binary Translation." In IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2017. http://dx.doi.org/10.1109/iecon.2017.8216946.
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Moghaddam, Javad Zahedi, Mohammad Esmaeili, and Aria Nosratinia. "Exact Recovery Threshold in Dynamic Binary Censored Block Model." In 2022 IEEE International Symposium on Information Theory (ISIT). IEEE, 2022. http://dx.doi.org/10.1109/isit50566.2022.9834456.
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Gouicem, Redha, Dennis Sprokholt, Jasper Ruehl, et al. "Risotto: A Dynamic Binary Translator for Weak Memory Model Architectures." In ASPLOS '23: 28th ACM International Conference on Architectural Support for Programming Languages and Operating Systems, Volume 1. ACM, 2022. http://dx.doi.org/10.1145/3567955.3567962.
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Liu, Chang, Shengbo Eben Li, and J. Karl Hedrick. "Model Predictive Control-Based Probabilistic Search Method for Autonomous Ground Robot in a Dynamic Environment." In ASME 2015 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/dscc2015-9814.
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Target search using autonomous robots is an important application for both civil and military scenarios. In this paper, a model predictive control (MPC)-based probabilistic search method is presented for a ground robot to localize a stationary target in a dynamic environment. The robot is equipped with a binary sensor for target detection, of which the uncertainties of binary observation are modeled as a Gaussian function. Under the model predictive control framework, the probability map of the target is updated via the recursive Bayesian estimation and the collision avoidance with obstacles is enforced using barrier functions. By approximating the updated probability map using a Gaussian Mixture Model, an analytical form of the objective function in the prediction horizon is derived, which is promising to reduce the computation complexity compared to numerical integration methods. The effectiveness of the proposed method is demonstrated by performing simulations in dynamic scenarios with both static and moving obstacles.
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Oparin, G. A., V. G. Bogdanova, and A. A. Pashinin. "Application of binary dynamical systems in the problem of classification of Boolean vectors." In 1st International Workshop on Advanced Information and Computation Technologies and Systems 2020. Crossref, 2021. http://dx.doi.org/10.47350/aicts.2020.15.
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The article proposes a method based on using binary dynamical systems in the classification problem for Boolean vectors (binary feature vectors). This problem has practical application in various fields of science and industry, for example, bioinformatics, remote sensing of natural objects, smart devices of the Internet of things, etc. Binary synchronous autonomous nonlinear dynamic models with an unknown characteristic matrix are considered. Matrix elements are chosen in such a way that the Boolean reference vectors are equilibrium states of the binary dynamic model. The attraction regions of equilibrium states act as classes (one reference vector corresponds to each class). The classified vector is the initial state of the model. Simple and aggregated classifiers are considered. The proposed method is demonstrated using an illustrative example.
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Parikyan, Tigran. "Unified Approach to Generate Crankshaft Dynamic Models for 3D and Torsional Vibration Analyses." In ASME 2003 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ices2003-0591.
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The paper considers two kinds of crankshaft dynamic models which can be used to analyze cranktrain dynamics: structured model, consisting of mass nodes connected by binary elastic elements — for 3D dynamic simulation, and equivalent torsional model — for torsional vibration analysis. A methodology of automatic generation of both models, sharing the same data in form of CAD model, is presented. The dynamic equivalence of both models is demonstrated, and their correlation with the original volumetric FE model is discussed. The main advantage of the method is a significant reduction of effort to generate the structured and torsional models.
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Al-Jumaily, A. M., S. Ashaat, B. A. Martin, R. Heinzer, J. Haba Rubio, and N. Stergiopulos. "Uvula Dynamic Characteristics." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14019.
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The airway binary fluid layer and the structural characteristics of the upper airways have significant influence on the activity of the airway muscles by changing airway compliance and collapsibility during obstructive sleep apnea trauma. The uvula plays an important role in the collapse process. Using MRI scans, this paper develops a structural model for the uvula and determines its dynamic characteristics in terms of natural frequencies and mode shapes as a preliminary process to determine optimum conditions to therapeutically relieve upper airway obstruction. The effect of the variation of tissue elasticity due to water content is elaborated on.
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Oparin, G. A., V. G. Bogdanova, and A. A. Pashinin. "Automation of microservices creation for qualitative analysis of binary dynamic systems." In The International Workshop on Information, Computation, and Control Systems for Distributed Environments 2019. Crossref, 2019. http://dx.doi.org/10.47350/iccs-de.2019.09.
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The main objective of qualitative research is to analyze the behavior of the trajectories of a dynamic system to verify whether it corresponds to the set of constraints characterizing the property. We use an approach to study binary dynamic systems on a finite time interval based on the author's method of Boolean constraints. Based on this method, the Boolean model of the properties of a binary dynamic system is written in the language of Boolean equations or Boolean formulas with quantifiers. Thus, the verification of various dynamical properties is reduced to solving the problems of Boolean constraints satisfiability or the validity of a quantified Boolean formula using efficient SAT or TQBF solvers. The high computational complexity of these problems requires the development of software and tools for their parallel and distributed solving and ensuring transparent end-user access to highperformance computing environments based on a service-oriented approach. This paper represents the architecture and functionality of a new instrumental system that automates the creation of a distributed application for solving the considered class of problems based on the microservice approach and multi-agent technology.
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Tanzawa, Yoshiaki, Yoshiharu Amano, Takumi Hashizume, and Akira Usui. "Dynamic Behavior of a Directly Combined Binary Turbine System Using a Mixture (R134a/R123)." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1356.
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Abstract Our previous binary turbine system, which employs steam as the primary working fluid, used R11 as the secondary working fluid because R11 has good characteristics as a working fluid in power plants. However, substitute LBMs (Low Boiling temperature Mediums) are being developed because of the ozone layer depletion by CFCs. We investigated the system using R123 in the next stage. Because R123 is also controlled, in the previous paper, modeling of the dynamics of a directly combined binary turbine system using a mixture of R134a and R123 are described. In this paper, the steady state characteristics and dynamic behavior of the system using a mixture of R134a and R123 are investigated taking into account the mole fraction of the mixture. In addition to the investigation using the experimental system, the following are clarified using our model: In the steady-state characteristics, there are remarkable differences in pressure based on the thermodynamic properties and in the load allotment of the two turbines. However, in the dynamic characteristics, the effect of the mole fraction could hardly be observed on the response characteristics of the rotating components to the load change.