Search results for "Intersection"
showing 10 items of 213 documents
Primitive sets of words
2020
Given a (finite or infinite) subset $X$ of the free monoid $A^*$ over a finite alphabet $A$, the rank of $X$ is the minimal cardinality of a set $F$ such that $X \subseteq F^*$. We say that a submonoid $M$ generated by $k$ elements of $A^*$ is {\em $k$-maximal} if there does not exist another submonoid generated by at most $k$ words containing $M$. We call a set $X \subseteq A^*$ {\em primitive} if it is the basis of a $|X|$-maximal submonoid. This definition encompasses the notion of primitive word -- in fact, $\{w\}$ is a primitive set if and only if $w$ is a primitive word. By definition, for any set $X$, there exists a primitive set $Y$ such that $X \subseteq Y^*$. We therefore call $Y$…
A Quantum Lovasz Local Lemma
2012
The Lovasz Local Lemma (LLL) is a powerful tool in probability theory to show the existence of combinatorial objects meeting a prescribed collection of "weakly dependent" criteria. We show that the LLL extends to a much more general geometric setting, where events are replaced with subspaces and probability is replaced with relative dimension, which allows to lower bound the dimension of the intersection of vector spaces under certain independence conditions. Our result immediately applies to the k-QSAT problem: For instance we show that any collection of rank 1 projectors with the property that each qubit appears in at most $2^k/(e \cdot k)$ of them, has a joint satisfiable state. We then …
In a World Where You can be Anyone: An Investigation into the Gendered Social Practices of Pakistani Facebook Users
2021
AbstractThis article investigates the construction of gender identities of Pakistani men and women Facebook users given that Facebook has emerged as the prime social media platform through which Pakistani users interact. By employing thematic analysis and taking insights from theory of performativity and intersectionality, the findings of the interview data suggest that the formation, negotiation, and expression of gender identities on Facebook occurs through complex interplay between the discourses of religion, class, culture, and tradition. In some cases, Facebook highlighted the reproduction of the prevalent cultural models of masculinity and femininity while in other cases; there was re…
The intersection between family dynamics and e-commerce strategy in family businesses: Empirical investigation in China
2021
This book chapter aims to contribute to increase our understanding of how e-Commerce strategy is designed, implemented, and influenced by family dynamics in family businesses, in China. Our research followed an exploratory and qualitative approach to analyse e-Commerce adoption by three Chinese family businesses, two of which were located in Beijing and one in Xinjiang. We used semi-structured interviews with key informants in the firms, focused on business history, business resources, as well as its corporate and e-Commerce strategies, and the family influence on the adoption of such strategies. The interviews were prepared based on the findings of a preliminary review of the literature on…
Life-Cycle Costing Decision-Making Methodology and Urban Intersection Design: Modelling and Analysis for a Circular City
2021
The importance of being circular reflects one of the key concepts of the life-cycle thinking that promotes the sustainable production of goods and services. If it is true that the analysis of the product life-cycle is fundamental to optimize the use of resources and to plan for the future reduction of adverse effects on urban environment, it is also true that there are still several barriers covering conceptual and practical issues which hinder the building of shared approaches for the economic evaluation of infrastructure projects. The chapter presents a case study where the Life-Cycle Cost methodology is used to compare three alternative intersection projects based on their total life-cyc…
The Intersection of $3$-Maximal Submonids
2020
Very little is known about the structure of the intersection of two $k$-generated monoids of words, even for $k=3$. Here we investigate the case of $k$-maximal monoids, that is, monoids whose basis of cardinality $k$ cannot be non-trivially decomposed into at most $k$ words. We characterize the intersection in the case of two $3$-maximal monoids.
Zoomasculinities: At the Intersection Between Animals, Animality, and Masculinity
2020
Gènere i traducció en català. Bases arqueològiques per a un estat de la qüestió
2011
En els darrers vint-i-cinc anys l’interès pels estudis de traducció i la relació amb el gènere ha propiciat una recerca abundant i diversa. Aquest article mira d’oferir una visió panoràmica sobre la intersecció de la traducció i els estudis de gènere en el context de la llengua catalana, un punt de partida per a recerques futures. D’una banda, donem notícia dels principals treballs, panoràmics i específics, que se centren en la recuperació de traductores catalanes i els seus escrits. De l’altra, repassem les teories que han plantejat la intersecció gènere i traducció en català.
Accounting for dispersion and correlation in estimating Safety Performance Functions. An overview starting from a case study
2013
In statistical analysis of crash count data, as well as in estimating Safety Performance Functions (SPFs), the failure of Poisson equidispersion hypothesis and the temporal correlation in annual crash counts must be considered to improve the reliability of estimation of the parameters. After a short discussion on the statistical tools accounting for dispersion and correlation, the paper presents the methodological path followed in estimating a SPF for urban four-leg, signalized intersections. Since the case study exhibited signs of underdispersion, a Conway-Maxwell-Poisson Generalized Linear Model (GLM) was fitted to the data; then a quasi-Poisson model in the framework of Generalized Estim…
Are the five natural DNA/RNA base monomers a good choice from natural selection?
2009
In order to prevent the damaging effects of sun radiation in the genetic material, its constituent chromophores, the five natural DNA/RNA nucleobases cytosine, thymine, uracil, adenine, and guanine, should be able to efficiently dissipate absorbed radiation, UV specifically, avoiding as much as possible photoreactions leading to lesions. It has been established experimentally and theoretically that efficient internal conversion channels, still open and relevant in the oligomer-stacked strands, exist in the monomers allowing an effective waste of the initial energy. Previous evidences cannot explain, however, why minor differences in the molecular structure modify drastically the photochemis…