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3D printing is a production process that has existed for three decades but its massive appearance is more recent. RepRap is a project created with the goal that more people have access to a open source low cost 3D printer. This research has been conducted based on knowledge shared by this community following their guidelines in order to take a step forward in the development of technology and cooperate...
Zambia has faced economic challenges since the beginning of 2015. The economy has come under strain in 2015 due to climate change. As a result, the water levels in the main source of electricity, the Kariba Dam, have dropped. This has caused a critical power deficit. This problem has negatively affected the economy and has further resulted in reduced GDP for the country. Solar energy is a possible...
This paper proposes a new software platform to control and monitor a squad of unmanned vehicles. Through the use of an open-source flight controller and an on-board Raspberry Pi it is possible to create a system that enables communication between a remote ground control stations (GCS) and a unmanned aerial vehicles (UAVs). Both are connected through the use of wireless and cellular networks like Wi-Fi,...
Hypertension is a chronic disease characterized by high blood pressure levels. Lack of adherence to the treatment of hypertension is a growing concern among health professionals. For this, m-Health solutions are increasingly evident, since they can automate processes and facilitate the inclusion of the patient's health conditions in a practical way and in any place, allowing the health professional...
The rapid development of Internet of Things (IoT) attracts growing attention from both industry and academia. IoT seamlessly connects the physical world and cyberspace via various sensors. It is more worth for us to pay attention to the mechanism of the events to work collaboratively rather than those standalone sensors. In this paper, we present a Distributed Event-centric Collaborative Workflows...
The performance of n-tier web-facing applications often suffer from response time long-tail problem. With relatively low resource utilization (less than 50%) and the majority of requests returning within a few milliseconds, a non-negligible num-ber of normally short requests may take seconds to return. We propose the millibottleneck theory of performance bugs (that lead to long-tail problems). Several...
This paper proposes a new software platform to control and monitor a squad of unmanned vehicles. Through the use of an open-source flight controller and an on-board Raspberry Pi it is possible to create a system that enables communication between a remote ground control stations (GCS) and a unmanned aerial vehicles (UAVs). Both are connected through the use of wireless and cellular networks like Wi-Fi,...
Content Delivery Networks (CDNs) are able to improve user-oriented application performance through caching and anycast routing or DNS-based user mapping mechanism. With the fact that BGP is widely used for inter autonomous system (AS) routing for CDNs, there is a middle mile bottleneck problem, which cause by the nature limitation of BGP. To solve this problem, we propose an SDN-based tunnel multi-path...
Micro-clouds infrastructures allow supporting applications on local and energy-efficient resources. Communication between micro-clouds takes place on shared and non-dedicated Internet links. Network control and optimization can only happen at the edge. For availability and persistence, the storage of application data must be geo-replicated. Maintaining strong data consistency under concurrent accesses...
Conventional flow-monitoring methods, such as sFlow, cannot detect low-rate HTTP GET Flooding denial of service (DoS) attacks, which are a threat even if the traffic rate is low. To solve this problem, we propose a method for detecting DoS attacks on the basis of the burst-state duration of traffic calculated using a quick packet-matching function of a general router such as TCAM. In addition, we...
Hajj is defined as a yearly Islamic pilgrimage to the holy place, Makkah. It is a religious obligation for Muslims who are financially and physically capable to perform. Hajj is one of the five pillars of Islam. The gathering of people during Hajj can be considered as the largest yearly gathering in the world. Every year, thousands of Muslims from all over the world will gather at the holy place during...
The increasing demand for smarter yet more efficient indoor spaces necessitates moving towards advanced technologies, such as Internet of Things architectures, to allow further integration to our physical world. In this work, we introduce a Bluetooth Low Energy-based infrastructure for location-aware buildings, along with a full-scale real-subject trial. The trial was undertaken with students in our...
At present telemedicine is widely used in developing countries for its variety of health services. In this paper, we have developed a low cost portable telemedicine tool kit for remote diagnosis of patients. Remote patient monitoring is one of the vital component of any telemedicine services. We have successfully able to collect patient data from any remote locations by using our developed tool kit...
We present the design, development, and deployment of an inexpensive, power-efficient, clustered, and scalable wireless sensor network (WSN) testbed. The testbed operates in a harsh environment in which neither GPS nor Internet connectivity are available. We use this testbed to collect real-time data during football games and other major events at Bobby Dodd stadium at Georgia Tech. The sensing devices...
Infrastructure-as-a-Service environments are becoming increasingly popular. When there is a failure, many applications require service restoration within a few seconds. Reaction to failures in Cloud is still slow for many applications. Monitoring is limited to instance metrics that are not conducive to precise diagnosis due to complexity of virtualization in physical hosts. Interferences among different...
On functional requirements of atmospheric particle monitoring system, this paper designs a distributed atmospheric particle monitoring system. The proposed system consists of a data acquisition network, embedded gateways, a database server and remote monitoring terminals. The data acquisition network consists of mobile data acquisition nodes and router nodes distributed in monitoring areas which are...
The Domain Name Service (DNS) is a vital service in the Internet. Much more than a simple translation mechanism, it also allows higher profile functionalities such as load balancing and enhanced content distribution. In the scope of cloud computing, DNS is foreseen as an elastic and robust service, supporting failover mechanisms, decentralised configuration and multi-tenant isolation.
In order to improve device management level and ensure device operation stabilization, a device control and manage system (DCMS) and its application method is proposed in this paper. The DCMS and its application method are made up of four essential parts: scheme design, data acquisition, data upload and transfer, applications. The details of each part have been illustrated comprehensively. Finally,...
Building on the adoption of the Network Functions Virtualization (NFV) and Software Defined Networking (SDN) paradigms, 5G networks promise distinctive features including the capability to support multi-tenancy. Virtual Network Operators (VNOs) are expected to co-exist over the shared infrastructure, realizing their network functionality on top of virtualized resources. In this context, we observe...
PerfMon is a prototype implementation of a real-time performance management method for sensor data communication in assisted living applications. It is implemented in accordance with the specification for GATT services in Bluetooth low energy (BLE). PerfMon provides a tool for real-time performance monitoring and control for caregivers and service providers. Test results from monitoring and control...
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