Industria de la goma elástica en Bolivia. Movimiento de peticiones, concesiones y cuadros de referencia desde 1892 hasta 1902.

At head of title: Oficina Nacional de Inmigracion, Estadística y Propaganda Geográfica.

La ley sobre ferrrocariles bolivianos de 31 de octubre de 1889; actas parlamentarias, texto de autorización legislativa para otorgar las concesiones.

Mode of access: Internet.

Memoria que tiene por objeto manifestar la posibilidad y facilidad de hacer navegable el rio Tajo desde Aranjuez hasta el Atlántico : las ventajas de esta empresa y las concesiones hechas á la misma para realizar la navegacion /

Contiene: T. II. Planos que representan los reconocimientos de las riberas del Tajo verificados en 1641, 1755 y 1828 con objeto de arreglar la navegacion de este rio (118 h. de lám.)

Política administrativa del gabinete Bravo Murillo, en el ramo de Fomento : y Demostración de la legalidad y conveniencia de las concesiones de ferro-carriles de aquella época /

Indice.

Afectación de la TIR por materialización de riesgos en proyectos de infraestructura vial

El presente trabajo de grado, tuvo como propósito identificar los riesgos presentes en la construcción de un proyecto de infraestructura vial y analizar cuál sería su impacto en la Tasa Interna de Retorno TIR, en caso de que estos se materialicen -- Para dar cumplimiento a estos objetivos se realizó el estudio de varios proyectos de infraestructura vial apoyado en visitas aprovechando las nuevas concesiones viales que surgen en el País como es el caso de las 4G o cuarta generación de concesiones viales, al igual que se utilizaron modelos de simulación, para representar los escenarios en los cuales los riesgos se puede presentar y afectar la inversión realizada, afectando los ingresos esperados a futuro

Procesos de factibilidad mediante el análisis y diseño de redes aplicadas a servicios de comunicaciones ofrecidos por Telmex Colombia S.A., con énfasis en soluciones transaccionales por medio de tecnología 4G

75 p.

Importancia de la auditoria de seguridad vial (ASV) en las concesiones viales de Colombia

134 p.

El Diálogo Competitivo como instrumento para la maduración de proyectos de infraestructura vial

En Colombia, mediante la Ley 1508 de 2102, se estableció el régimen jurídico de las Asociaciones Público Privadas (APP) y con la aprobación de la Ley 1682 de 2013, se regularon los proyectos de infraestructura de transporte. Con la presente tesis se pretende demostrar la figura del Diálogo Competitivo como procedimiento incompleto e insuficiente, apropiado así por nuestro régimen jurídico en la Ley de APP, visto desde la perspectiva de la Unión Europea, especialmente de los modelos español, inglés y francés, porque carece de la mayoría de sus elementos característicos. Posteriormente se realiza una crítica al Diálogo Competitivo colombiano desde la perspectiva de la Unión Europea, ya que se evidencia en la figura interna su precariedad frente a un procedimiento debidamente definido y organizado como el de la Unión Europea. Entre las instituciones jurídicas adoptadas por la Ley de APP, se encuentra el Diálogo Competitivo, que es un procedimiento, verificado en la etapa de estructuración de los contratos APP de iniciativa pública, cuyos antecedentes registran el mayor reconocimiento internacional en la Unión Europea (UE). Ésta introdujo esa figura a su régimen jurídico, a través de la Directiva 2004/18/CE, a su vez derogada por la Directiva 2014/24/UCE. La tesis culmina con una serie de conclusiones y recomendaciones que se estiman útiles para repensar y reestructurar el Diálogo Competitivo en los proyectos de infraestructura vial en Colombia, tarea que le corresponde al Congreso Nacional, pues así lo ha dispuesta la jurisprudencia del Consejo de Estado.

Modelling the broadband wireless channel in rural Australia

The internet infrastructure which supports high data rates has a major impact on the Australian economy and the world. However, in rural Australia, the provision of broadband services to an internet dispersed population over a large geographical area with low population densities remains both an economic and technical challenge [1]. Furthermore, the implementation of currently available technologies such as fibre-to-the-premise (FTTP), 3G, 4G and WiMAX seems to be impractical, considering the low population density that is distributed in a large area. Therefore, new paradigms and innovative telecommunication technologies need to be explored to overcome the challenges of providing faster and more reliable broadband internet services to internet dispersed rural areas. The research project implements an innovative Multi-User- Single-Antenna for MIMO (MUSA-MIMO) technology using the spectrum currently allocated to analogue TV. MUSAMIMO technology can be considered as a special case of MIMO technology, which is beneficial when provisioning reliable and high-speed communication channels. Particularly, the abstract describes the development of a novel MUSA-MIMO channel model that takes into account temporal variations in the rural wireless environment. This can be considered as a novel approach tailor-made to rural Australia for provisioning efficient wireless broadband communications.

On ensuring continuity of mobile communications in a disaster environment

Natural disasters and deliberate, willful damage to telecommunication infrastructure can result in a loss of critical voice and data services. This loss of service hinders the ability for efficient emergency response and can cause delays leading to loss of life. Current mobile devices are generally tied to one network operator. When a disaster is of significant impact, that network operator cannot be relied upon to provide service and coverage levels that would normally exist. While some operators have agreements with other operators to share resources (such as network roaming) these agreements are contractual in nature and cannot be activated quickly in an emergency. This paper introduces Fourth Generation (4G) wireless networks. 4G networks are highly mobile and heterogeneous, which makes 4G networks highly resilient in times of disaster.

Personal media and wireless cities : towards an urban spatial analysis

For the past decade, at least, varieties of small, hand held networked instruments have appeared on the global scene, selling in record numbers, and being utilized by all manner of persons from the old to the young; children, women, men, the wealthy and the poor and in all countries. Their presences bespeak a radical shift in telecommunications infrastructure and the future of communications. They are particularly visible in urban areas where mobile transmission network infrastructure (3G, 4G, cellular and Wi-Fi) is more established and substantial, options more plentiful, and density of populations more dramatic. These end user products—I phones, cell phones, Blackberries, DSi, DS, IPads, Zooms, and others – of the mobile communications industry are the latest, hottest globalized commodities. At the same time, wirelessness, or the state of being wireless, and therefore capable of taking along one's networks, communicating from unlikely spaces, and navigating with GPS, is a complex social, political and economic communications phenomenon of early 21st century life. This thesis examines the specter of being wireless in cities. It lends the entire idea an experimentally envisioned, historical and planned context wherein personalization of media tools is seen both as a design development of corporate, artistic, and military imagination, as well as a profound social phenomenon enabling new forms of sharing, belonging, and urban community. In doing that it asserts the parameters of a new mobile space which, aside from clear benefits to humankind by way of mobility, has reinscribed numerous categories including gender. Moreover, it posits the recognition of other, more nuanced theoretical spaces for complex readings of gender and gendered use, including some instantiation of the notion of 'network' itself as a cyborgian and gendered social form. Additionally, cities are studied as places where technology is not only quickly popularized, but is connected to larger political interests, such as the reading of data, tracking of information, and the new security culture. In so doing the work has been undertaken as an urban spatial analysis and experimental ethnography, utilizing architectural, feminist, techno-utopian, industrial and theoretical literatures as discursive underpinnings from whence understandings and interpretations of mobile space, the mobile office, networked mobility, and personal media have come, linking the space of cities to specific, pioneering urban public art projects in which voice, texting and MMS have been utilized in expressions of ubiquitous networks and urban history. Through numerous examples of techno art, the thesis discusses the 'wireless city' as an emerging cultural, socially constructed economic and spatial entity, both conceived and formed through historic processes of urbanization.