912 research outputs found
Remote sensing as tool for development of landslide databases: The case of the Messina Province (Italy) geodatabase
Landslide geodatabases, including inventories and thematic data, today are fundamental tools for national and/or local authorities in susceptibility, hazard and risk management. A well organized landslide geo-database contains different kinds of data such as past information (landslide inventory maps), ancillary data and updated remote sensing (space-borne and ground based) data, which can be integrated in order to produce landslide susceptibility maps, updated landslide inventory maps and hazard and risk assessment maps. Italy is strongly affected by landslide phenomena which cause victims and significant economic damage to buildings and infrastructure, loss of productive soils and pasture lands. In particular, the Messina Province (southern Italy) represents an area where landslides are recurrent and characterized by high magnitude, due to several predisposing factors (e.g. morphology, land use, lithologies) and different triggering mechanisms (meteorological conditions, seismicity, active tectonics and volcanic activity). For this area, a geodatabase was created by using different monitoring techniques, including remote sensing (e.g. SAR satellite ERS1/2, ENVISAT, RADARSAT-1, TerraSAR-X, COSMO-SkyMed) data, and in situ measurements (e.g. GBInSAR, damage assessment). In this paper a complete landslide geodatabase of the Messina Province, designed following the requirements of the local and national Civil Protection authorities, is presented. This geo-database was used to produce maps (e.g. susceptibility, ground deformation velocities, damage assessment, risk zonation) which today are constantly used by the Civil Protection authorities to manage the landslide hazard of the Messina Province
Organising new product development Knowledge hollowing-out and knowledge integration
The paper analyses the organization of the new product development process at FIAT from a resource-based perspective. The focus is on organizational resources for integrating dispersed specialist knowledge required in the development of complex products. The analysis shows how the application of a resource-based perspective is able to uncover negative long-term effects of outsourcing on the knowledge base (hollowing out), despite beneficial short-term effects on cost.New product development, FIAT Auto, knowledge integration systems integration, modularity, knowledge hollowing-out, resource-based view
Engineering secure systems: Models, patterns and empirical validation
Several development approaches have been proposed to handle the growing complexity of software system design. The most popular methods use models as the main artifacts to construct and maintain. The desired role of such models is to facilitate, systematize and standardize the construction of software-based systems. In our work, we propose a model-driven engineering (MDE) methodological approach associated with a pattern-based approach to support the development of secure software systems. We address the idea of using patterns to describe solutions for security as recurring security problems in specific design contexts and present a well-proven generic scheme for their solutions. The proposed approach is based on metamodeling and model transformation techniques to define patterns at different levels of abstraction and generate different representations according to the target domain concerns, respectively. Moreover, we describe an operational architecture for development tools to support the approach. Finally, an empirical evaluation of the proposed approach is presented through a practical application to a use case in the metrology domain with strong security requirements, which is followed by a description of a survey performed among domain experts to better understand their perceptions regarding our approach
Model-Based GN and C Simulation and Flight Software Development for Orion Missions beyond LEO
For Orion missions beyond low Earth orbit (LEO),
the Guidance, Navigation, and Control (GN&C) system is
being developed using a model-based approach for simulation
and flight software. Lessons learned from the development of
GN&C algorithms and flight software for the Orion
Exploration Flight Test One (EFT-1) vehicle have been applied
to the development of further capabilities for Orion GN&C
beyond EFT-1. Continuing the use of a Model-Based
Development (MBD) approach with the Matlab/Simulink
tool suite, the process for GN&C development and analysis has
been largely improved. Furthermore, a model-based
simulation environment in Simulink, rather than an external
C-based simulation, greatly eases the process for development
of flight algorithms. The benefits seen by employing lessons
learned from EFT-1 are described, as well as the approach for
implementing additional MBD techniques. Also detailed are
the key enablers for improvements to the MBD process,
including enhanced configuration management techniques for
model-based software systems, automated code and artifact
generation, and automated testing and integration
Socio-Entropy System Approach for Analyzing of Social Forestry Management in Indonesia
Socio-entropy system approach (SESA) as used as a comprehensive tool to identify any kind of social shortcoming that might have constrained achievement of government policy on social-forestry. The study objectives were to observe all critical factors on the program implementation of social forestry and to analyze any intervening variables relevant to socio-psychological, socio-ecological, socio-economic, and socio-cultural shortcomings (being called here as socio-entropies) that would have been most crucial to the required policy modification. Samples were taken by purposive sampling and intensively interviewed using questionnaire. Data was analysed using structural equation modeling. The study found out that the socio-psychological entropy which apparently needs to comprehend basically relates to 3-intervening variables of self-esteem, individual compassion, and non-formal education. Likewise from the socio-ecological stand point, what need to be controled better were the spirit of owning more land plots, and the geo-morphological position of owned land plots. Meanwhile socio-economic entropy seemed to appear as consequences of people efforts in gaining more income due to hedonistic temptation and lack of knowledge about the type of environmentally sound livelihoods. Finally, the crucial factors of socio-cultural entropy were the faded away adat-law, weakening social norms, and absence of inter-ethnic but more closed, and traditional networking
Approach for model-based requirements engineering for the planning of engineering generations in the agile development of mechatronic systems
The crucial factor for a successful usage of modeling approaches of systems engineering is the interaction of language, method, and tool. For this, specific challenges arise for the application of MBSE in agile requirements engineering. From observations in agile development practice at a machine tool manufacturer, the challenges for model-based requirements engineering are described and each is assigned to its critical aspect of modeling: The language must formally represent the requirements data model, especially for planning engineering generations. The tool must support collaborative, interdisciplinary cooperation, and consider the dynamics of the requirements model during the development process. The method must individually support the requirements engineering activities, which are carried out several times in a sprint during the development process and must enable a target-oriented process for bundling the requirements into engineering generations. Taking these demands into account, an approach is then presented providing activity-based views in conjunction with activity steps based on a consistent ontology for the description of product requirements and verification activities. The activity steps are composed in activity patterns and support the user in making use of the views for modeling requirements for the engineering generations. The approach is implemented in the software JIRA at a machine tool manufacturer. The subsequent evaluation shows that the approach is used in development practice and offers the potential to plan engineering generation systematically and comprehensibly and to ensure a regular review of the implemented requirements
Values and Heritage Conservation: Research Report, The Getty Conservation Institute, Los Angeles
Researches values and benefits of cultural heritage conservation undertaken by GCI through its Agora initiative as a means of articulating and furthering ideas that have emerged from the conservation field in recent years
Virtual teams: A literature review
In the competitive market, virtual teams represent a growing response to the need for fasting time-to-market, low-cost and rapid solutions to complex organizational problems. Virtual teams enable organizations to pool the talents and expertise of employees and non-employees by eliminating time and space barriers. Nowadays, companies are heavily investing in virtual team to enhance their performance and competitiveness. Despite virtual teams growing prevalence, relatively little is known about this new form of team. Hence the study offers an extensive literature review with definitions of virtual teams and a structured analysis of the present body of knowledge of virtual teams. First, we distinguish virtual teams from conventional teams, different types of virtual teams to identify where current knowledge applies. Second, we distinguish what is needed for effective virtual team considering the people, process and technology point of view and underlying characteristics of virtual teams and challenges they entail. Finally, we have identified and extended 12 key factors that need to be considered, and describes a methodology focused on supporting virtual team working, with a new approach that has not been specifically addressed in the existing literature and some guide line for future research extracted
Aeroservoelastic Sensor-Based Control
Aeroservoelastic Sensor-based Control (certifiable-by-design with performance and stability guarantees
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