Página 1 dos resultados de 74 itens digitais encontrados em 0.012 segundos

‣ Definição de requisitos para um sistema de monitoramento de veículos no transporte rodoviário de cargas.; Requirements definition for a monitoring system of vehicles in a transport of goods via roads.

Kouri, Márcia Gatti
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 01/08/2007 Português
Relevância na Pesquisa
27.18465%
Esta dissertação apresenta o levantamento e definição dos requisitos necessários para um sistema de monitoramento de veículos no transporte rodoviário de cargas, cujo custo de implantação seja acessível a grande parte das empresas. Para isso são aplicados alguns métodos da Engenharia de Requisitos, tais como: Vord, Preview e Volere. O conjunto de requisitos obtido através deste levantamento é então utilizado como fonte para a especificação de requisitos do sistema proposto.; This dissertation shows the survey and definition of the necessary requirements regarding a monitoring system for vehicles that transport goods via roads, whose low cost implementation is accessible for most of the companies. For this purpose, some methods of the Engineering of Requirements are applied, such as: Vord, Preview and Volere. The set of requirements gotten via this survey is the source for the specification of requirements of the proposed system.

‣ A comunicação organizacional sob a perspectiva da midiatização social : novos processos de visibilidade e interação na era da cibercultura

Stasiak, Daiana
Fonte: Universidade de Brasília Publicador: Universidade de Brasília
Tipo: Tese
Português
Relevância na Pesquisa
17.626956%
Tese (doutorado)—Universidade de Brasília, Faculdade de Comunicação, Programa de Pós- Graduação em Comunicação, 2013.; A tese investiga a comunicação organizacional sob os pressupostos da midiatização social, uma ambiência que se estabelece a partir das transformações advindas com a cibercultura. Entre os elementos que constituem os fenômenos de comunicação organizacional, o trabalho reflete sobre os processos de visibilidade e interação entre três instâncias: as organizações, a internet e os sujeitos. Na sociedade contemporânea, os meios são fundamentais para a obtenção da visibilidade e conquista da interação das organizações com seus públicos. Apesar de sua relevância incontestável, os meios tradicionais (rádio, TV e impressos) possuem regras editorias e uma tendência mais verticalizada e transmissionista, que restringe a capacidade comunicativa das organizações e proporciona muito mais a difusão de informações do que o relacionamento entre as instâncias. Essa perspectiva linear de comunicação não coincide com o cenário de complexidade no qual as organizações atuam hoje. Nesse sentido, o comportamento dialógico com os atores sociais e o conhecimento do ambiente são fundamentais para a manutenção das organizações na sociedade. O desenvolvimento tecnológico traz o advento da internet...

‣ Insights into pediatric diffuse intrinsic pontine glioma through proteomic analysis of cerebrospinal fluid

M. Saratsis, Amanda; Yadavilli, Sridevi; Magge, Suresh; Rood, Brian R.; Perez, Jennifer; Hill, D. Ashley; Hwang, Eugene; Kilburn, Lindsay; Packer, Roger J.; Nazarian, Javad
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
26.822766%
Diffuse intrinsic pontine glioma (DIPG) is a leading cause of brain tumor–related death in children. DIPG is not surgically resectable, resulting in a paucity of tissue available for molecular studies. As such, tumor biology is poorly understood, and, currently, there are no effective treatments. In the absence of frozen tumor specimens, body fluids—such as cerebrospinal fluid (CSF), serum, and urine—can serve as more readily accessible vehicles for detecting tumor-secreted proteins. We analyzed a total of 76 specimens, including CSF, serum, urine, and normal and tumor brainstem tissue. Protein profiling of CSF from patients with DIPG was generated by mass spectrometry using an LTQ-Orbitrap-XL and database search using the Sequest algorithm. Quantitative and statistical analyses were performed with ProteoIQ and Partek Genomics Suite. A total of 528 unique proteins were identified, 71% of which are known secreted proteins. CSF proteomic analysis revealed selective upregulation of Cyclophillin A (CypA) and dimethylarginase 1 (DDAH1) in DIPG (n = 10), compared with controls (n = 4). Protein expression was further validated with Western blot analysis and immunohistochemical assays using CSF, brain tissue, serum, and urine from DIPG and control specimens. Immunohistochemical staining showed selective upregulation of secreted but not cytosolic CypA and DDAH1 in patients with DIPG. In this study...

‣ Stepwise Molecular Display Utilizing Icosahedral and Helical Complexes of Phage Coat and Decoration Proteins in the Development of Robust Nanoscale Display Vehicles

Parent, Kristin N.; Deedas, Christina T.; Egelman, Edward H.; Casjens, Sherwood R.; Baker, Timothy S.; Teschke, Carolyn M.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
27.18465%
A stepwise addition protocol was developed to display cargo using bacteriophage P22 capsids and the phage decorator (Dec) protein. Three-dimensional image reconstructions of frozen-hydrated samples of P22 particles with nanogold-labeled Dec bound to them revealed the locations of the N- and C- termini of Dec. Each terminus is readily accessible for molecular display through affinity tags such as nickel-nitrilotriacetic acid, providing a total of 240 cargo-binding sites. Dec was shown by circular dichroism to be a β–sheet rich protein, and fluorescence anisotropy binding experiments demonstrated that Dec binds to P22 heads with high (~110 nM) affinity. Dec also binds to P22 nanotubes, which are helically symmetric assemblies that form when the P22 coat protein contains the F170A amino acid substitution. Several classes of tubes with Dec bound to them were visualized by cryo-electron microscopy and their three-dimensional structures were determined by helical reconstruction methods. In all instances, Dec trimers bound to P22 capsids and nanotubes at positions where three neighboring capsomers (oligomers of six coat protein subunits) lie in close proximity to one another. Stable interactions between Dec and P22 allow for the development of robust...

‣ Integrated strain actuation in aircraft with highly flexible composite wings

Brown, Eric L. (Eric Lee)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 205 p.; 13537650 bytes; 13537404 bytes; application/pdf; application/pdf
Português
Relevância na Pesquisa
17.490862%
The purpose of this thesis is to provide a framework for the study of wing warping as a means of achieving multiple aeroelastic goals. Shape change is achieved by integrating anisotropic piezoelectric composites (APC) within the passive composite wing skin. The goals include the ability of integrated strain actuation (ISA) to provide sufficient wing deformation for roll maneuver, gust load alleviation, flutter suppression, and redistribution of maneuver loads. A nonlinear analysis tool was constructed to study the behavior of aircraft with highly flexible active wings undergoing large deformation. It combines a new large displacement, strain-based finite element beam formulation with a finite-state unsteady aerodynamics model and a thin-wall active beam cross section model. The tool was created with the flexibility to model different aircraft configurations, including unconventional ones such as joined wing designs. The effects of sweep and dihedral, as well as large deformations are taken into account in the calculation of aerodynamic loads. The strain-based finite element formulation allows for a simplified control design because the flexible degrees of freedom are easily accessible by strain gages. To support the evaluation of ISA performance...

‣ Bus Rapid Transit Accessibility Guidelines

Rickert, Tom
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Português
Relevância na Pesquisa
38.418662%
In recent years helpful guides have appeared in both English and Spanish to assist planners and officials to construct accessible buildings and pedestrian infrastructure which are usable by seniors, persons with disabilities, and all others who especially benefit from universal design. Less has been written about access to public transport systems. Very little guidance is available concerning specific issues which confront those planning Bus Rapid Transit (BRT) systems, mass transit systems which incorporate a spectrum of design and operational features on integrated trunk and feeder routes and which were initiated in Latin America and are now spreading throughout the region and beyond. The guidelines focus on the BRT environment and assume that interested parties can take advantage of existing guidelines to clarify general issues of access to public space, buildings, and pedestrian infrastructure. The guidelines generally follow the travel path of a passenger using a full-featured Bus Rapid Transit system. The accessible travel chain begins with sidewalks and pedestrian crossings and continues into a typical mid-island station served by buses with left-side doors (in countries where traffic drives on the right side). Buses pull up to an enclosed station with a ramped platform the height of the bus floor. The guidelines then focus on station features...

‣ Improving Accessibility to Transport for People with Limited Mobility : A Practical Guidance Note

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Português
Relevância na Pesquisa
17.490862%
This document aims to provide practical guidance on how best to include consideration of accessibility for People with Limited Mobility (PLM). While disabled people are a primary focus, the definition of PLM considered within this guidance note therefore also encompasses this broader range of users with mobility constraints and needs. Barriers to addressing the needs of PLM are often a product of a lack of information for transport professionals and facility designers, combined with limited resources. To assist client countries with implementing the principles and binding obligations of the United Nations Convention on the Rights of Persons with Disabilities (UNCRPD), it is clear that World Bank Task Team Leaders (TTLs) need to understand how to build in accessibility for disabled people in the design and implementation of transport projects. This guidance note therefore aims to aid World Bank TTLs when specifying and managing Bank funded transport projects in order to improve the accessibility of transport systems for PLM. It is intended to serve primarily as a point of reference for TTLs on how to include...

‣ Disaster Risk Management in the Transport Sector

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Trabalho em Andamento
Português
Relevância na Pesquisa
27.37421%
Natural hazards regularly impact the performance of transport systems and their ability to provide safe, reliable, efficient, and accessible means of transport for all citizens, especially in emergency situations. Despite the frequency of natural hazards, and the threat of more extreme and variable weather as a result of climate change, there is still no systematic approach to addressing natural disasters in the transport sector and there is little knowledge that has been disseminated on this topic. This report offers a framework for understanding the principles of resilience in transport. It provides practical examples, gathered from an extensive secondary literature review and interviews, of the measures that transport professional can implement in transport projects.

‣ If You Give People Cash, Does It Help?

World Bank
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Brief
Português
Relevância na Pesquisa
26.822766%
In Uganda, researchers evaluated a government program that gave unsupervised cash grants to youth for small business development and training. Based on final results four years after the intervention, the cash transfers achieved nearly all the goals. Beneficiaries invested most of the cash in building business opportunities. While they still did agricultural work, they spent more time working in skilled industry and services and their incomes rose. The study also illustrates the important weaknesses of microfinance. This impact evaluation and a host of other studies show that many young adults have high returns on investment when they have access to capital. Microloans are poor vehicles for small business growth and the development of cottage industry. As governments and the private sector work to develop this financial sophistication, cash transfers are likely to be important drivers of poverty alleviation and development for youth. This Evidence to Policy note was jointly produced by the World Bank Group...

‣ Assigning Unmanned Undersea Vehicles (UUVs) to mine detection operations

Diaz, J. Enrique Reyes
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.670107%
Approved for public release; distribution is unlimited; In an era when mines are inexpensive and easily accessible, present mine detection and area reconnaissance capabilities are insufficient to enable unencumbered maneuver in the littoral regions. Unmanned undersea vehicles (UUVs) possess potential to provide tactical commanders with full understanding of the mine threat without risk to ships or personnel and without exposing intentions. By integrating an assortment of emerging capabilities, a system comprised of a variety of UUVs could address this mine threat. This thesis develops and implements the Mine Reconnaissance System Assessment (MiRSA) model, a mixed integer-linear program, to assign a mix of UUVs to search areas within a suspected minefield. Using unclassified UUV performance estimates, this thesis compares combinations of two Long-term Mine Reconnaissance System (LMRS) vehicles, six Remote Environmental Monitoring Units (REMUS) vehicles, and a notional Manta vehicle. For a 262 square nautical mile area in the Straits of Hormuz, MiRSA finds the two LMRS vehicles can complete a 95% confidence level search in 91 hours, the Manta vehicle can complete the search in 130 hours, and the two LMRS vehicles with Manta employed optimally together require only 52 hours. For an exhaustive search...

‣ Quality initiatives in the commercial development of reusable launch vehicles

Perry, Derick I. L.
Fonte: Monterey, California: Naval Postgraduate School Publicador: Monterey, California: Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
26.822766%
Approved for public release; distribution is unlimited; This thesis examines positive tools and techniques accessible and helpful to improving quality of the Reusable Launch Vehicle (RLV). Over the last three decades, NASA has directly been involved in developing modern and technologically improved RLVs. The technologies were projected to facilitate cheaper access to orbital space, as evidenced by its past X-programs and space launch initiatives. Different private firms have attempted and are still attempting to develop new RLVs for orbital space applications. The large development expenses of these kinds of systems, coupled with the downturn of the Low Earth Orbit market, have made development of RLVs, in particular by the commercial sector, increasingly difficult. For these reasons, most commercial space transportation firms have shifted their focus toward suborbital market opportunities, where the technical challenges are lower and market entry is less expensive. This thesis identifies techniques within Lean Aerospace Initiative that are employed by market players today and also best suited for the RLV effort. Additionally, this thesis provides a historical perspective of both RLV development efforts within the government and industry...

‣ Planning, Connecting, and Financing Cities--Now : Priorities for City Leaders

World Bank
Fonte: Washington, DC: World Bank Publicador: Washington, DC: World Bank
Tipo: Publications & Research :: Publication; Publications & Research :: Publication
Português
Relevância na Pesquisa
27.18465%
This report provides Mayors and other policymakers with a policy framework and diagnostic tools to anticipate and implement strategies that can avoid their cities from locking into irreversible physical and social structures. At the core of the policy framework are the three main dimensions of urban development. · Planning— where the focus is on making land transactions easier, and making land use regulations more responsive to emerging needs especially to coordinate land use planning with infrastructure, natural resource management, and risks from hazards; · Connecting—where the focus is on making a city’s markets (for labor, goods, and services) more accessible to neighborhoods in the city and to other cities. Here the focus is also on investing in public transport, and pricing private transport fully; and · Financing— where the focus is on how a city can leverage its own assets to finance new assets for example, through land value capture, establishing creditworthiness for local governments and utilities to access domestic debt and bond markets and how to set clear and consistent rules to attract private investors to create jobs in cities. This report also distills lessons from prototypes urbanization diagnostics which have been piloted to reflect challenges for countries at nascent (Uganda...

‣ Mali : Transport Support to Sustainable Economic Growth

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Economic & Sector Work :: Other Infrastructure Study; Economic & Sector Work
Português
Relevância na Pesquisa
27.14442%
This Economic and Sector Work (ESW) is consistent with the objectives laid out for the transport sector in the Poverty Reduction Strategy Paper (PRSP), and the Country Assistance Strategy (CAS), with its two primary objectives focused on strengthening existing reforms, and, helping define a forthcoming reform program. The proposed transport sector strategy relies on three pillars to: 1) promote sustainable development of transport infrastructure, ensuring adequate allocation of financial, and human resources to infrastructure maintenance; 2) increase transport sector efficiency, through sound market, and fiscal policies that support the rapid modernization of Mali's transport companies; and, 3) support cross sectoral initiatives, primarily in the areas of economic competitiveness, road safety, rural poverty alleviation, and in addition, to support HIV/AIDS prevention, and health services accessibility. Since transport costs represent a significant share of the imported costs of intermediary goods used in building up Mali's export capacity...

‣ Bhutan : Transport Sector Note

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Economic & Sector Work :: Other Infrastructure Study; Economic & Sector Work
Português
Relevância na Pesquisa
27.67479%
Landlocked Bhutan faces unique challenges, and opportunities as it pursues the development of its transport sector into the 21st century. Bhutan's population growth rate is high, rural-urban migration is accelerating, and, fueled by sustained economic growth, the country is urbanizing rapidly, giving rise to an expanding urban middle class, with rising expectations of well-paid employment, accessible services, and consumption potential. However, accessibility to a large measure depends on availability of reliable, and affordable transportation. Poor rural access is synonymous with rural isolation, and poverty, while high external and domestic transport costs constrain the country's economic and social development. Transportation poses a considerable cost disadvantage to business and commercial undertakings; road transport is slow and regularly disrupted by landslides and flooding; air transport is costly and erratic. Costly transport is a major factor constraining the development of tourism, horticultural exports...

‣ Papua New Guinea - Anti-Money Laundering and Combating the Financing of Terrorism : Mutual Evaluation Report

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Economic & Sector Work :: Other Social Protection Study; Economic & Sector Work
Português
Relevância na Pesquisa
26.822766%
Papua New Guinea (PNG) faces very serious risks of Money laundering (ML) from various criminal activities including domestic corruption (misappropriation of public funds), which is considered a serious problem. PNG is experiencing rapid economic growth, very large scale foreign investment and an escalating crime rate. While the Financial Intelligence Unit (FIU) is building its capacity, there is no clear political level commitment to 'follow the money' to tackle corruption and other crimes, and no demonstrated commitment to regulate and supervise AML obligations by financial sector regulators, which severely hampers the authorities ability to tackle financial aspects of corruption. Misappropriation of government funds occurs using government payments which, according to the authorities, are generally placed through the banking sector in PNG and used to purchase real estate, high-value vehicles, distributed in cash or moved offshore. This report provides a summary of the Anti-Money Laundering and Combating the Financing of Terrorism (AML/CFT) measures in place in PNG at the time of the mission or shortly thereafter. The report was produced by the World Bank as part of the Financial Sector Assessment Program (FSAP) of PNG.

‣ The SADC’s Infrastructure : A Regional Perspective

Ranganathan, Rupa; Foster, Vivien
Fonte: Banco Mundial Publicador: Banco Mundial
Tipo: Publications & Research :: Policy Research Working Paper
Português
Relevância na Pesquisa
27.18465%
Infrastructure improvements boosted growth in the Southern African Development Community (SADC) by 1.2 percentage points per capita per year during 1995-2005, mainly from access to mobile telephony. Road network improvements made small growth contributions, while power sector inadequacy had a negative impact. Infrastructure improvements that matched those of Mauritius, the regional leader, could boost regional growth performance by 3 percentage points. SADC's 15 member countries include small, isolated economies with island states, a mix of low- and middle-income countries, and larger countries with potentially large economies. The economic geography reinforces the importance of regional infrastructure development to create a larger market and greater economic opportunities. The region's infrastructure indicators are high for Africa. The regional road network is well-developed, and surface transport is comparatively cheap, but subject to delays and long-haul fees. An extensive railway system competes directly with road transport. With integration and improvements...

‣ Life, Information, Entropy, and Time: Vehicles for Semantic Inheritance

Crofts, Antony R.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em //2007 Português
Relevância na Pesquisa
26.822766%
Attempts to understand how information content can be included in an accounting of the energy flux of the biosphere have led to the conclusion that, in information transmission, one component, the semantic content, or “the meaning of the message,” adds no thermodynamic burden over and above costs arising from coding, transmission and translation. In biology, semantic content has two major roles. For all life forms, the message of the genotype encoded in DNA specifies the phenotype, and hence the organism that is tested against the real world through the mechanisms of Darwinian evolution. For human beings, communication through language and similar abstractions provides an additional supra-phenotypic vehicle for semantic inheritance, which supports the cultural heritages around which civilizations revolve. The following three postulates provide the basis for discussion of a number of themes that demonstrate some important consequences. (i) Information transmission through either pathway has thermodynamic components associated with data storage and transmission. (ii) The semantic content adds no additional thermodynamic cost. (iii) For all semantic exchange, meaning is accessible only through translation and interpretation, and has a value only in context. (1) For both pathways of semantic inheritance...

‣ Stability by KAM confinement of certain wild, nongeneric relative equilibria of underwater vehicles with coincident centers of mass and bouyancy

Patrick, George W.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 02/04/2002 Português
Relevância na Pesquisa
26.822766%
Purely rotational relative equilibria of an ellipsoidal underwater vehicle occur at nongeneric momentum where the symplectic reduced spaces change dimension. The stability these relative equilibria under momentum changing perturbations is not accessible by Lyapunov functions obtained from energy and momentum. A blow-up construction transforms the stability problem to the analysis symmetry-breaking perturbations of Hamiltonian relative equilibria. As such, the stability follows by KAM theory rather than energy-momentum confinement.; Comment: 18 pages, 3 figures

‣ Examination of Policy Alternatives to Promote the Expansion of Natural Gas Vehicle Refueling Stations in the United States

Baldwin, George
Fonte: Universidade Duke Publicador: Universidade Duke
Tipo: Masters' project
Publicado em 22/04/2014 Português
Relevância na Pesquisa
17.506304%
In the United States, nearly a third of our energy is consumed by gasoline and diesel fueled vehicles which emit harmful by-products such as nitrogen oxide, particulate matter, and 28% of the U.S. greenhouse gas emissions. Consequently, concerns about these emissions have created interest in alternative and innovative transportation options. One developing option is the use of compressed natural gas (CNG) to operate vehicles. Natural gas is the cleanest of all fossil fuels, and can be used to reduce transportation sector-related carbon monoxide emissions by 90-97%, carbon dioxide emissions by 25%, and nitrogen oxide emissions by 35%. Additionally, the increased use of natural gas can reduce pollutants in non-attainment areas, and also support our country’s effort to meet the National 2020 greenhouse gas emission reduction target of 17%. The natural gas vehicle (NGV) market can be economically viable due to relatively inexpensive equivalent natural gas prices of $2/gallon including taxes. One outstanding obstacle in this market’s development is the inadequate number of fueling stations in this country. Despite the 11% annual growth rate for CNG fueling stations in the U.S. since 2009, the number of these stations as compared to retail gasoline outlets remains less than 1%. The capital intensive nature and associated risk of investing in these fueling stations has resulted in an under-developed refueling system network. Absent policy support to subsidize the investment for publicly accessible fueling stations...

‣ Optimizing Accessible Taxi Service to Augment Traditional Public Transit Services in Delaware

Tuttle, Douglas; Eaton, Kristen
Fonte: Universidade de Delaware Publicador: Universidade de Delaware
Tipo: Outros
Português
Relevância na Pesquisa
37.575906%
published and funded by the Delaware Center for Transportation; As one of the most rapidly “graying” states in the nation, Delaware soon will be faced with significant growth in the demand for public transportation services that meet the needs of an increasingly older population. This population, moreover, is more likely to require assistance due to one or more disabilities that may affect individuals’ ability to go outside their homes. Coupled with an ongoing shift of the state’s population from the more urban north to the more rural south and a growing desire among older adults to “age in place” if at all possible, the impact this “graying” phenomenon on the state’s already burdened paratransit bus system will become unmanageable unless programmatic changes are implemented. The purpose of this report is to explore the efficacy of raising Delaware’s taxi industry from its current balkanized status to a level of accessibility and performance that will permit it to augment the state’s traditional public transit services. The report’s title employs the phrase “optimizing accessible taxi service” but, as quickly became clear in the process of inventorying the nature and extent of existing services, the term truly understates the magnitude of the change that is required. In Delaware...