Ordinal Research Papers - Academia.edu (original) (raw)

Background Vascular prevention trials typically use dichotomous event outcomes although this may be inefficient statistically and gives no indication of event severity. We assessed whether ordinal outcomes would be more efficient and how... more

Background Vascular prevention trials typically use dichotomous event outcomes although this may be inefficient statistically and gives no indication of event severity. We assessed whether ordinal outcomes would be more efficient and how to best analyse them. Methods Chief investigators of vascular prevention randomised controlled trials that showed evidence of either benefit or harm, or were included in a systematic review that overall showed benefit or harm, shared individual participant data from their trials. Ordered categorical versions of vascular event outcomes (such as stroke and myocardial infarction) were analysed using 15 statistical techniques and their results then ranked, with the result with the smallest p-value given the smallest rank. Friedman and Duncan’s multiple range tests were performed to assess differences between tests by comparing the average ranks for each statistical test. Results Data from 35 trials (254,223 participants) were shared with the collaborati...

Presentación realizada en el Centro de Estudios Públicos el 30 de noviembre de 2016, durante el seminario “Arte y poesía. Juan Luis Martínez”, organizado a partir de la publicación de la tercera edición de La nueva novela.

We study the problem of allocating multiple objects to agents without transferable utilities, where each agent may receive more than one object according to a quota. Under lexicographic preferences, we characterize the set of... more

We study the problem of allocating multiple objects to agents without transferable utilities, where each agent may receive more than one object according to a quota. Under lexicographic preferences, we characterize the set of strategyproof, non-bossy, and neutral quota mechanisms and show that under a mild Pareto efficiency condition, serial dictatorship quota mechanisms are the only mechanisms satisfying these properties. We then extend quota mechanisms to randomized settings, and show that the random serial dictatorship quota mechanisms (RSDQ) are envyfree, strategyproof, and ex post efficient for any number of agents and objects and any quota system, proving that the well-studied Random Serial Dictatorship (RSD) satisfies envyfreeness when preferences are lexicographic.

Data and algorithmic modeling are two different approaches used in predictive analytics. The models discussed from these two approaches include the proportionalodds logit model (POLR), the vector generalized linear model (VGLM), the... more

Data and algorithmic modeling are two different approaches used in predictive analytics. The models discussed from these two approaches include the proportionalodds logit model (POLR), the vector generalized linear model (VGLM), the classification and regression tree model (CART), and the random forests model (RF). Patterns in the data were analyzed using trigonometric polynomial approximations and Fast Fourier Transforms. Predictive modeling is used frequently in statistics and data science to find the relationship between the explanatory (input) variables and a response (output) variable. Both approaches prove advantageous in different cases depending on the data set. In our case, the data set contains an output variable that is ordinal. Using grade records from Murray State University, the goal is to find the best predictive model that can implement an ordinal output by means of data modeling and algorithmic modeling. To train the models, k-fold cross validation is used to find t...

Data and algorithmic modeling are two different approaches used in predictive analytics. The models discussed from these two approaches include the proportionalodds logit model (POLR), the vector generalized linear model (VGLM), the... more

Data and algorithmic modeling are two different approaches used in predictive analytics. The models discussed from these two approaches include the proportionalodds logit model (POLR), the vector generalized linear model (VGLM), the classification and regression tree model (CART), and the random forests model (RF). Patterns in the data were analyzed using trigonometric polynomial approximations and Fast Fourier Transforms. Predictive modeling is used frequently in statistics and data science to find the relationship between the explanatory (input) variables and a response (output) variable. Both approaches prove advantageous in different cases depending on the data set. In our case, the data set contains an output variable that is ordinal. Using grade records from Murray State University, the goal is to find the best predictive model that can implement an ordinal output by means of data modeling and algorithmic modeling. To train the models, k-fold cross validation is used to find t...

The present work search to study the regression on variables dummies. More specifically, to revise the theory and the cases where they can be used, in order to elaborate, in a succinct form, a simple and including material on the subject,... more

The present work search to study the regression on variables dummies. More specifically, to revise the theory and the cases where they can be used, in order to elaborate, in a succinct form, a simple and including material on the subject, capable to assist in research and works. After the formalization, will present the operational procedures to execute them, with aid of computational resources, using in such a way, the Statistica software version 5.1. Key-Words: Regression, Variable Dummy, Statistica Software.

Besides fertility and mortality and the balance between the two, migration also injluencespopulation development in terms af size, sex and age composition. Through theanalysis af population development in Hungary, this paper investigated... more

Besides fertility and mortality and the balance between the two, migration also injluencespopulation development in terms af size, sex and age composition. Through theanalysis af population development in Hungary, this paper investigated the role afinternational migration in demographic processes. Wehave followed closely the processin which, after the demographic catastrophes in Hungarian history (1239-1290and 1550-1650), the missing population was replaced by foreigners settling down inHungary. The role played by this settled population has been examined as well. Wehave outlined the ejfects ofthe third demographic disaster (1914-20), which has determinedthe development af Hungarian population up till the present day. As a consequenceaf the peace treaties at the end af World War I Hungary lost two-thirds of itspopulation, thereby changing the structure af the population profoundly. Besides theabove-mentioned processes we have demonstrated the direct and indirect ejfects afcontempora...

Se presenta y utiliza en el siguiente artículo, un grupo de propiedades que contribuyen a la construcción del Conjunto Ternario de Cantor acudiendo a la dinámica simbólica, cuya función es caracterizar las estructuras de las órbitas de un... more

Se presenta y utiliza en el siguiente artículo, un grupo de propiedades que contribuyen a la construcción del Conjunto Ternario de Cantor acudiendo a la dinámica simbólica, cuya función es caracterizar las estructuras de las órbitas de un sistema dinámico dado por medio de una sucesión de símbolos. Siendo el Conjunto Ternario de Cantor, en términos topológicos, un conjunto compacto, infinito y perfecto, no denso en cualquier intervalo.

The Context Change Potential Model of presuppositions, due to Heim, Kartunnen and Stalnaker, is examined in the light of recent work in dynamic semantics. It is shown that some phenomena concerning the interaction of presupposition and... more

The Context Change Potential Model of presuppositions, due to Heim, Kartunnen and Stalnaker, is examined in the light of recent work in dynamic semantics. It is shown that some phenomena concerning the interaction of presupposition and quantification, which had been thought troublesome for the Context Change Model, can be handled without invoking local or intermediate accommodation. A model of global accommodation is developed, and this is applied to a number of pragmatic issues including the ...

Background Vascular prevention trials typically use dichotomous event outcomes although this may be inefficient statistically and gives no indication of event severity. We assessed whether ordinal outcomes would be more efficient and how... more

Background Vascular prevention trials typically use dichotomous event outcomes although this may be inefficient statistically and gives no indication of event severity. We assessed whether ordinal outcomes would be more efficient and how to best analyse them. Methods Chief investigators of vascular prevention randomised controlled trials that showed evidence of either benefit or harm, or were included in a systematic review that overall showed benefit or harm, shared individual participant data from their trials. Ordered categorical versions of vascular event outcomes (such as stroke and myocardial infarction) were analysed using 15 statistical techniques and their results then ranked, with the result with the smallest p-value given the smallest rank. Friedman and Duncan’s multiple range tests were performed to assess differences between tests by comparing the average ranks for each statistical test. Results Data from 35 trials (254,223 participants) were shared with the collaborati...

El objetivo de este trabajo es presentar los elementos básicos de lo que se conoce como numerabilidad y no numerabilidad de conjuntos, y luego definir el concepto de cardinal. El desarrollo de este concepto de número cardinal de un... more

El objetivo de este trabajo es presentar los elementos básicos de lo que se conoce como numerabilidad y no numerabilidad de conjuntos, y luego definir el concepto de cardinal. El desarrollo de este concepto de número cardinal de un conjunto<span class="text_exposed_show">s se hace por medio del uso de funciones inyectivas, sorbreyectivas, y del cálculo explícito de inversas. También se utiliza el teorema de Cantor-Bernstein-Schroeder para probar la equivalencia de ciertos subconjuntos de números reales, y se culmina probando que cualquier conjunto infinito se puede expresar como una unión disjunta de conjuntos infinitos, al utilizar los números primos.</span>

En este articulo se presenta un modelo evolutivo de competencias ordinales que consta de 6 estados de conocimiento empiricamente validados. Se describe un estudio empirico exploratorio que consto de entrevistas clinicas individuales y... more

En este articulo se presenta un modelo evolutivo de competencias ordinales que consta de 6 estados de conocimiento empiricamente validados. Se describe un estudio empirico exploratorio que consto de entrevistas clinicas individuales y cuyo objetivo era analizar el conocimiento de los ninos sobre la relacion logica ordinal de siguiente inmediato. Los resultados obtenidos sirvieron para determinar los estados evolutivos de los que consta el modelo. Dicho modelo se valido mediante una prueba de 6 tareas, cada una de las cuales presentaba las caracteristicas logicas matematicas propias de uno de los estados del modelo. Modelization of Ordinal Competences in 3 to 6 Years Old Students In this paper we present a developmental model of ordinal competence which consists of 6 empirically validated states of knowledge. An exploratory empirical study was carried out with individual clinical interviews. The aim was to analyze children’s knowledge about the logical-ordinal relationship of the imm...

In ordinary talk, we presuppose a great deal. That is, we take things for granted, assuming that the other conversational participants share our knowledge of them. This book is about linguistic presupposition, how what we take for granted... more

In ordinary talk, we presuppose a great deal. That is, we take things for granted, assuming that the other conversational participants share our knowledge of them. This book is about linguistic presupposition, how what we take for granted is reflected in what we say. In the book I first explore what around a hundred previous researchers have had to say about presupposition, and then make my own contribution. That contribution is set within the framework of dynamic semantics, an approach to meaning that has been developed ...

It is proven that there is a family of sets of natural numbers which has enumerations in every Turing degree except for the recursive degree. This implies that there is a countable structure which has representations in all but the... more

It is proven that there is a family of sets of natural numbers which has enumerations in every Turing degree except for the recursive degree. This implies that there is a countable structure which has representations in all but the recursive degree. Moreover, it is shown that there is such a structure which has a recursively represented elementary extension.

Presupposition itself has been a cause of the diversity of interpretations since presupposition sticks to utterances, sometimes unsaid clearly, that will provide implied meanings based on the context that is being talked about. The... more

Presupposition itself has been a cause of the diversity of interpretations since presupposition sticks to utterances, sometimes unsaid clearly, that will provide implied meanings based on the context that is being talked about. The purposes of the study are to investigate three major points: the kinds of presupposition, their functions, and the percentage of each presupposition in the mystery and thriller film script of "Escape from Pretoria" by Francis Annan. This research used a qualitative method to analyze the obtained data. The observation is also used to collect data in which data are obtained from film scripts. The writer applies Yule's theory (1996) to analyze the presupposition kinds, Halliday's theory (2003) to analyze presupposition functions, and Subana's formula to gain the percentage of each presupposition. As a result, there were 177 presuppositions obtained in the film script, with 166 existential presuppositions (93.8%), six factive presuppositions (3.4%), four lexical presuppositions (2.2%,) and one counterfactual presupposition (0.6%). From 177 presuppositions, the data were classified into 23 regulatory functions (13.0%), 2 interactional functions (1.1%), 57 representational functions (32.2%), 79 personal functions (44.6%), 1 imaginative function (0.6%), 4 instrumental functions (2.3%) and 11 heuristic functions (6.2%). Therefore, the dominant presupposition is existential, and the dominant function of presupposition is personal.

Individualised Rating-Scale Procedure: A Means of Reducing Response Style Contamination in Survey Data? Elisa Chami-Castaldi, Nina Reynolds and James Wallace University of Bradford, UK e. chami-castaldi@ bradford. ac. uk nl reynolds@... more

Individualised Rating-Scale Procedure: A Means of Reducing Response Style Contamination in Survey Data? Elisa Chami-Castaldi, Nina Reynolds and James Wallace University of Bradford, UK e. chami-castaldi@ bradford. ac. uk nl reynolds@ bradford. ac. uk j. ...

We show that there is a low T-upper bound for the class of K-trivial sets, namely those which are weak from the point of view of algorithmic randomness. This result is a special case of a more general characterization of ideals in... more

We show that there is a low T-upper bound for the class of K-trivial sets, namely those which are weak from the point of view of algorithmic randomness. This result is a special case of a more general characterization of ideals in T-degrees for which there is a low T-upper bound.

In this paper we use the version CPA game prism of the Covering Property Axiom, which has been formulated by Ciesielski and Pawlikowski and holds in the iterated perfect set model, to study the relations between different kinds of... more

In this paper we use the version CPA game prism of the Covering Property Axiom, which has been formulated by Ciesielski and Pawlikowski and holds in the iterated perfect set model, to study the relations between different kinds of ultrafilters on ω and Q. In particular, we will give a full account for the logical relations between the properties of being a selective ultrafilter, a P-point, a Q-point, and an ω1-OK point.

A regressão categorial constitui uma forma linearizável de regressão não linear, por meio de uma ou mais variáveis explicativas, permitindo predizer a probabilidade de ocorrência das várias categorias da variável dependente. O objetivo... more

A regressão categorial constitui uma forma linearizável de regressão não linear, por meio de uma ou mais variáveis explicativas, permitindo predizer a probabilidade de ocorrência das várias categorias da variável dependente. O objetivo deste trabalho consistiu em apresentar uma introdução aos diferentes tipos de regressão categorial, como a regressão logística, a regressão multinomial e a regressão ordinal. Abordamos os diferentes modelos de regressão categorial com a função de ligação logit, permitindo esta a linearização de cada modelo, onde aparece, naturalmente, a medida de associação epidemiológica odds ratio, sendo esta medida interpretada para variáveis categóricas e quantitativas. Realçamos alguns pormenores fundamentais da estimação dos coeficientes de regressão do logit, dos pressupostos e avaliação da qualidade de cada um dos modelos: logístico, multinomial e ordinal. Cada um destes modelos foram aplicados a dados colhidos em escolas secundárias angolanas, com utilização ...