The study of organic stabilization is crucial for understanding its impact on the durability and effectiveness of earthen plaster.Analyzing natural admixtures’effects on plaster properties provides insights that aid ...The study of organic stabilization is crucial for understanding its impact on the durability and effectiveness of earthen plaster.Analyzing natural admixtures’effects on plaster properties provides insights that aid in optimizing plaster composition and application for desired characteristics.The addition of biopolymers,known to enhance plaster performance,necessitates further investigation to understand their role in earthen plaster stabilization.This study focuses on Tata Somba homes in Benin and Togo,recognized as UNESCO World Heritage sites.These unique architectural examples embody“architecture without architects”,relying solely on local traditional knowledge.The objective is to explore and revive Tata Somba’s ancient eco-technology for earth plaster stabilization.Research shows that biopolymers’combined stabilization and application techniques can improve earthen plaster performance.Seven promising bio-stabilizers were identified,suggesting their potential as sustainable,effective options for CO_(2) mitigation in buildings.These findings not only deepen our understanding of earthen architecture but also underscore the potential of merging traditional,eco-friendly building methods with modern scientific insights to create sustainable solutions for cultural heritage preservation and contemporary built environments.展开更多
The underlying vision of the Digital Earth(DE)calls for applications that can embed vast quantities of geo-referenced data and allow users to study and analyse of our planet.Since the declaration of this vision in the...The underlying vision of the Digital Earth(DE)calls for applications that can embed vast quantities of geo-referenced data and allow users to study and analyse of our planet.Since the declaration of this vision in the late 90s,a significant number of DE data-sets have been created by the industry,governments,non-governmental organisations and individuals.An overwhelming majority of the successful applications that use DE data-sets has its end-user applications running on the desktop.While these applications are great tools,they remain inaccessible to the community as a whole.In this paper,we present a framework for the development of cyber-applications.We define an abstract architecture for cyber-applications based on the model-view-controller paradigm,which allows the dynamic inclusion of functional and data components into its execution engine at run-time.We define the operational characteristics of cyber-applica-tions.We also specify the interface of pluggable components to the architecture.Finally,we demonstrate the appropriateness of the abstract architecture by means of a case study.展开更多
Global Earth Observing System of Systems(GEOSS)presents a great challenge of System of Systems integration across organisational and political boundaries.One existing paradigm that can address the scale of the challen...Global Earth Observing System of Systems(GEOSS)presents a great challenge of System of Systems integration across organisational and political boundaries.One existing paradigm that can address the scale of the challenge is that of the Sensor Web.In this paradigm,the internet is evolving into an active,macro sensing instrument,capable of drawing sensory data from around the globe to the fingertips of individuals.The Sensor Web will support scientific research and facilitate transparent political decision making.This article presents some of the technologies explored and activities engaged in by the GEOSS Sensor Web community,towards achieving GEOSS goals.展开更多
We can adequately study broad global issues and policies only by taking geosciences into account.Our research and decision-making must share and make effective use of interdisciplinary data sources,models,and processe...We can adequately study broad global issues and policies only by taking geosciences into account.Our research and decision-making must share and make effective use of interdisciplinary data sources,models,and processes.Noninteroperability impedes sharing of data and computing resources.Standards from the Open Geospatial Consortium(OGC)and other organizations are the basis for successfully deploying a seamless,distributed information infrastructure for the geosciences.Several specifications now adopted by the OGC consensus process are the result of OGC interoperability initiatives.The OGC standards,deployment architectures,and interoperability initiatives are described showing how the OGC standards baseline has been developed and applies to the geosciences.展开更多
Security has recently become a major concern in distributed geo-infrastructures for spatial data provision.Thus,a lightweight approach for securing distributed low-power environments such as geo-sensor networks is nee...Security has recently become a major concern in distributed geo-infrastructures for spatial data provision.Thus,a lightweight approach for securing distributed low-power environments such as geo-sensor networks is needed.The first part of this article presents a survey of current security mechanisms for authentication and authorisation.Based on this survey,a lightweight and scalable token-based security infrastructure was developed,which is tailored for use in distributed geo-web service infrastructures.The developed security framework comprises dedicated components for authentication,rule-based authorisation and optimised storage and administration of access rules.For validation purposes,a prototypical implementation of the approach has been created.展开更多
文摘The study of organic stabilization is crucial for understanding its impact on the durability and effectiveness of earthen plaster.Analyzing natural admixtures’effects on plaster properties provides insights that aid in optimizing plaster composition and application for desired characteristics.The addition of biopolymers,known to enhance plaster performance,necessitates further investigation to understand their role in earthen plaster stabilization.This study focuses on Tata Somba homes in Benin and Togo,recognized as UNESCO World Heritage sites.These unique architectural examples embody“architecture without architects”,relying solely on local traditional knowledge.The objective is to explore and revive Tata Somba’s ancient eco-technology for earth plaster stabilization.Research shows that biopolymers’combined stabilization and application techniques can improve earthen plaster performance.Seven promising bio-stabilizers were identified,suggesting their potential as sustainable,effective options for CO_(2) mitigation in buildings.These findings not only deepen our understanding of earthen architecture but also underscore the potential of merging traditional,eco-friendly building methods with modern scientific insights to create sustainable solutions for cultural heritage preservation and contemporary built environments.
文摘The underlying vision of the Digital Earth(DE)calls for applications that can embed vast quantities of geo-referenced data and allow users to study and analyse of our planet.Since the declaration of this vision in the late 90s,a significant number of DE data-sets have been created by the industry,governments,non-governmental organisations and individuals.An overwhelming majority of the successful applications that use DE data-sets has its end-user applications running on the desktop.While these applications are great tools,they remain inaccessible to the community as a whole.In this paper,we present a framework for the development of cyber-applications.We define an abstract architecture for cyber-applications based on the model-view-controller paradigm,which allows the dynamic inclusion of functional and data components into its execution engine at run-time.We define the operational characteristics of cyber-applica-tions.We also specify the interface of pluggable components to the architecture.Finally,we demonstrate the appropriateness of the abstract architecture by means of a case study.
文摘Global Earth Observing System of Systems(GEOSS)presents a great challenge of System of Systems integration across organisational and political boundaries.One existing paradigm that can address the scale of the challenge is that of the Sensor Web.In this paradigm,the internet is evolving into an active,macro sensing instrument,capable of drawing sensory data from around the globe to the fingertips of individuals.The Sensor Web will support scientific research and facilitate transparent political decision making.This article presents some of the technologies explored and activities engaged in by the GEOSS Sensor Web community,towards achieving GEOSS goals.
文摘We can adequately study broad global issues and policies only by taking geosciences into account.Our research and decision-making must share and make effective use of interdisciplinary data sources,models,and processes.Noninteroperability impedes sharing of data and computing resources.Standards from the Open Geospatial Consortium(OGC)and other organizations are the basis for successfully deploying a seamless,distributed information infrastructure for the geosciences.Several specifications now adopted by the OGC consensus process are the result of OGC interoperability initiatives.The OGC standards,deployment architectures,and interoperability initiatives are described showing how the OGC standards baseline has been developed and applies to the geosciences.
基金This work has been funded by the European Commission(FP7 project GENESIS,reference No.223996)the Austrian Federal Ministry for Science and ResearchThe au。
文摘Security has recently become a major concern in distributed geo-infrastructures for spatial data provision.Thus,a lightweight approach for securing distributed low-power environments such as geo-sensor networks is needed.The first part of this article presents a survey of current security mechanisms for authentication and authorisation.Based on this survey,a lightweight and scalable token-based security infrastructure was developed,which is tailored for use in distributed geo-web service infrastructures.The developed security framework comprises dedicated components for authentication,rule-based authorisation and optimised storage and administration of access rules.For validation purposes,a prototypical implementation of the approach has been created.
