A Middleware Framework for Constraint-Based Deployment and Autonomic Management of Distributed Applications

We propose a middleware framework for deployment and subsequent autonomic management of component-based distributed applications. An initial deployment goal is specified using a declarative constraint language, expressing constraints over aspects such as component-host mappings and component interconnection topology. A constraint solver is used to find a configuration that satisfies the goal, and the configuration is deployed automatically. The deployed application is instrumented to allow subsequent autonomic management. If, during execution, the manager detects that the original goal is no longer being met, the satisfy/deploy process can be repeated automatically in order to generate a revised deployment that does meet the goal.Comment: Submitted to Middleware 0

Valuing Historic Places: Traditional and Contemporary Approaches

Decisions about which older buildings, structures, and places should be conserved are fundamental to the practice of architectural conservation. Conservation professionals use the interrelated concepts of integrity, authenticity, and historical value to determine which historic places are worthy of importance. Traditionally, these concepts are predicated on preserving the object rather than conserving the meaning and values associated with the object. In other works, the goal is to benefit the object and not the people who value the object. This method, which has roots in antiquated nineteenth-century Western scientific traditions, deprecates the importance of people, processes, and meanings in how places are valued and conserved. Thus, conservation professionals produce “objective” meanings for other conservators, but not for everyday people. The net result is a failure to understand how local populations actually value their historic places. A recent movement in architectural conservation is to emphasize the role of contemporary social, cultural, and personal meanings in valuing historic places and the processes in which places develop these values overtime. This pluralistic perspective recognizes that different populations and cultures will have diverse ways of valuing historic places. Ultimately, for places such as Iraq, we have very little, if any, data to support conservation decisions that understand and respect local cultures and tradition. The danger is in applying traditional, Western, concepts that still dominate the conservation profession to non-Western contexts. There is a tremendous learning opportunity to engage in the cross-pollination of ideas from the perspectives of the Western and Eastern traditions and to learn how the citizens of Iraq value their cultural heritage. This information, once gathered, can then inform how to best approach the conservation of Iraqi urban centers

Designing a novel virtual collaborative environment to support collaboration in design review meetings

Project review meetings are part of the project management process and are organised to assess progress and resolve any design conflicts to avoid delays in construction. One of the key challenges during a project review meeting is to bring the stakeholders together and use this time effectively to address design issues as quickly as possible. At present, current technology solutions based on BIM or CAD are information-centric and do not allow project teams to collectively explore the design from a range of perspectives and brainstorm ideas when design conflicts are encountered. This paper presents a system architecture that can be used to support multi-functional team collaboration more effectively during such design review meetings. The proposed architecture illustrates how information-centric BIM or CAD systems can be made human- and team-centric to enhance team communication and problem solving. An implementation of the proposed system architecture has been tested for its utility, likability and usefulness during design review meetings. The evaluation results suggest that the collaboration platform has the potential to enhance collaboration among multi-functional teams

Using Sequential Mixed Social Science Methods to Define and Measure Heritage Conservation Performance

There is no agreed-upon definition for heritage conservation performance, but it is possible to borrow ideas from the natural resource conservation field to inform this concept. Dimensions of performance can include economic, technical, and sociocultural and experiential indices. Because heritage conservation ostensibly benefits people as its primary goal, however, the values of most stakeholders ought to play a role in defining performance. Most of these values are subjective and represent sociocultural and personal meanings and tend to differ dramatically from the positivistic, fabric-centered value system of conservation experts. Measurement implies quantification, yet many sociocultural values are based on qualitative meanings that defy direct attempts at quantification. One solution for this predicament is to employ a sequential mixed-method approach where qualitative meanings are gathered from stakeholders and then these meanings are used to inform the development of a quantitative method, such as a survey instrument. In this way, while the qualitative meanings are not being directly “measured” as such, aspects of the phenomenon behind these meanings can be measured, quantified, and subjected to statistical techniques. A brief representative case study is presented as an example of how social science methodologies can help define and measure performance

Designinig Coordination among Human and Software Agents

The goal of this paper is to propose a new methodology for designing coordination between human angents and software agents and, ultimately, among software agents. The methodology is based on two key ideas. The first is that coordination should be designed in steps, according to a precise software engineering methodology, and starting from the specification of early requirements. The second is that coordination should be modeled as dependency between actors. Two actors may depend on one another because they want to achieve goals, acquire resources or execute a plan. The methodology used is based on Tropos, an agent oriented software engineering methodology presented in earlier papers. The methodology is presented with the help of a case study

The architectural and environmental retrofitting of public social housing as a resource for contemporary cities. The redesign of building envelopes

The current focus on the transformation of Western cities puts forward, in a shared and far-reaching manner, ‘degrowth’ as an opportunity to renew and update the perspective of sustainability, not only from an environmental point of view, but from a social and economic point of view as well. The most modern updated legislation is also headed in this direction: considering building stock as a resource for renovation, adopting policies and strategies aimed at reducing land and energy consumption, reusing and recycling building stock. Nowadays, the interpretation of the terms Reduce, Reuse, Recycle in relation to urban devel-opment offers the opportunity to create a new generation of spaces and architectures that sees buildings – dilapidated, neglected, worn out or abandoned – as a real resource and, hence, value. Renovations concern new programmes and projects for rethinking the uses, meanings and the values contained in existing construction (from individual buildings to whole neigh-bourhoods) and which can change. Within this scenario, suburbs are now considered part of the contemporary city and they are becoming the object of particular attention from those who are involved in urban planning and managing urban developments. Among the resources that have already been built, social hous-ing stock is a wide field of investigation, from different points of view. This built heritage can involve different levels of building and space transformation and defines various design approaches: the overall architectural quality is to be acknowledged. These design approaches reinterpret regeneration activities and are not just limited to the ‘technical’ renovation of buildings: they also take into account the consequent urban, social and economic implications