Church-Rosser groups and growing context-sensitive groups

A finitely generated group is called a Church-Rosser group (growing context-sensitive group) if it admits a finitely generated presentation for which the word problem is a Church-Rosser (growing context-sensitive) language. Although the Church-Rosser languages are incomparable to the context-free languages under set inclusion, they strictly contain the class of deterministic context-free languages. As each context-free group language is actually deterministic context-free, it follows that all context-free groups are Church-Rosser groups. As the free abelian group of rank 2 is a non-context-free Church-Rosser group, this inclusion is proper. On the other hand, we show that there are co-context-free groups that are not growing context-sensitive. Also some closure and non-closure properties are established for the classes of Church-Rosser and growing context-sensitive groups. More generally, we also establish some new characterizations and closure properties for the classes of Church-Rosser and growing context-sensitive languages.

Computations in Relative Algebraic K-Groups

Let G be finite group and K a number field or a p-adic field with ring of integers O_K. In the first part of the manuscript we present an algorithm that computes the relative algebraic K-group K_0(O_K[G],K) as an abstract abelian group. We solve the discrete logarithm problem, both in K_0(O_K[G],K) and the locally free class group cl(O_K[G]). All algorithms have been implemented in MAGMA for the case K = \IQ. In the second part of the manuscript we prove formulae for the torsion subgroup of K_0(\IZ[G],\IQ) for large classes of dihedral and quaternion groups.

Computation of relativistic symmetry orbitals for finite double point groups

A program is presented for the construction of relativistic symmetry-adapted molecular basis functions. It is applicable to 36 finite double point groups. The algorithm, based on the projection operator method, automatically generates linearly independent basis sets. Time reversal invariance is included in the program, leading to additional selection rules in the non-relativistic limit.

Del total e marketing al marketing integral : ¿fuente de ventaja competitiva?

Según Philip Kotler, considerado el padre del mercadeo, (en su libro Principles Of Marketing) la mercadotecnia es «el proceso social y administrativo por el cual los grupos e individuos satisfacen sus necesidades al crear e intercambiar bienes y servicios». La presente investigación tomará como punto de referencia para conceptualizar el marco teórico, la historia y evolución del mercadeo y sus actuales tendencias y rumbos; así como la incidencia que tiene en la planificación del área de mercadeo para las empresas que siguen este tipo de corrientes contemporáneas. Durante el desarrollo de la presente investigación se analizaran las nuevas tendencias de mercadeo basándose en la evolución y su referencia histórica. Ahora, se verá cómo el e-marketing compone una nueva estrategia para el desarrollo de ventaja competitiva entendiéndose ésta como un conjunto de atributos de una empresa que la distinguen de sus competidores. Este nuevo marketing que se quiere presentar, Total e-marketing, se compone del posicionamiento de la organización en la realidad virtual. Se utilizarán como factores claves de éxito en el posicionamiento de la organización en buscadores de internet como redes, wikipedia, google, facebook, etc.

Problems with large groups

A list of considerations on the problems with large groups. This material was sent to Debra Morris in 2007, by David Jaques, an educationist with many years' experience of working with groups.

Networked Life: Module CIS 112, University of Pennsylvania, Spring 2008

What kind of science is appropriate for understanding the Facebook? How does Google find what you're looking for... ...and exactly how do they make money doing so? What structural properties might we expect any social network to have? How does your position in an economic network (dis)advantage you? How are individual and collective behavior related in complex networks? What might we mean by the economics of spam? What do game theory and the Paris subway have to do with Internet routing? What's going on in the pictures to the left and right? Networked Life looks at how our world is connected -- socially, economically, strategically and technologically -- and why it matters. The answers to the questions above are related. They have been the subject of a fascinating intersection of disciplines including computer science, physics, psychology, mathematics, economics and finance. Researchers from these areas all strive to quantify and explain the growing complexity and connectivity of the world around us, and they have begun to develop a rich new science along the way. Networked Life will explore recent scientific efforts to explain social, economic and technological structures -- and the way these structures interact -- on many different scales, from the behavior of individuals or small groups to that of complex networks such as the Internet and the global economy. This course covers computer science topics and other material that is mathematical, but all material will be presented in a way that is accessible to an educated audience with or without a strong technical background. The course is open to all majors and all levels, and is taught accordingly. There will be ample opportunities for those of a quantitative bent to dig deeper into the topics we examine. The majority of the course is grounded in scientific and mathematical findings of the past two decades or less.

Análisis del papel de los medios de comunicación televisivos (Chilevisión y CNN Chile) y de redes sociales (Facebook y Twitter) frente a reivindicaciones estudiantiles, ambientales e indígenas durante el gobierno Piñera de marzo a diciembre de 2010 en Chile

A lo largo de la historia, diversos actores interactúan y participan en la consolidación y configuración de una sociedad. Dentro de estos actores están los medios de comunicación como mediadores e informadores de lo que sucede en determinados momentos considerados importantes para la comunidad. Asimismo, el gobierno es otro actor fundamental con el que se forja una relación y se configura un contexto determinado influenciado también por el resto de la sociedad. Es así como muchas veces los medios pueden trabajar desde diversas aristas, desarrollando un rol significativo frente a las decisiones o acciones que tome un gobierno y los grupos o movimientos que se creen y manifiesten en un ambiente específico. Los países latinoamericanos no son ajenos a esta dinámica y es así como en este caso se hablará del papel de ciertos medios de comunicación televisivos como lo son CNN Chile y Chilevisión TV y de las redes sociales Facebook y Twitter frente al proceso reivindicatorio de estudiantes, indígenas y grupos ambientales con relación al Gobierno Piñera de marzo a diciembre del 2010.

Les activitats nàutiques i les persones amb hipoacúsia : una experiència amb focus groups.

Resumen tomado del autor

Interviews And Focus Groups: Purpose Paradigms Protocols and Pragmatics

Introduction to interview data, how it is used and how and why it might be collected

Trust and Privacy Concern Within Social Networking Sites - A Comparison of Facebook and MySpace

Trust and Privacy Concern Within Social Networking Sites - A Comparison of Facebook and MySpace - Analyzed Paper

INFO2009 - Team 'DROP TABLE groups;

Edshare for INFO2009 coursework 2 - Team 'DROP TABLE groups;

Does Facebook ruin your job Prospects?

News Report: Every Potential 2040 President Already Unelectable Due To Facebook:YouTube fake American news item (2min 39secs) in which all possible candidates are excluded because of something they show on Facebook. And Could your Facebook page ruin your job prospects? - A Guardian article that suggests that employers may be more tolerant than supposed.