Search results for "500"
showing 10 items of 3244 documents
Bi-objective multi-layer location–allocation model for the immediate aftermath of sudden-onset disasters
2019
International audience; Locating distribution centers is critical for humanitarians in the immediate aftermath of a sudden-onset disaster. A major challenge lies in balancing the complexity and uncertainty of the problem with time and resource constraints. To address this problem, we propose a location–allocation model that divides the topography of affected areas into multiple layers; considers constrained number and capacity of facilities and fleets; and allows decision-makers to explore trade-offs between response time and logistics costs. To illustrate our theoretical work, we apply the model to a real dataset from the 2015 Nepal earthquake response. For this case, our method results in…
The Effect of Hydrology on Soil Erosion
2020
In this Special Issue, we have tried to include manuscripts about soil erosion and degradation processes and the accelerated rates due to hydrological processes and climate change. We considered that the main goal was successfully reached. The new research focused on measurements, modelling, and experiments under field or laboratory conditions developed at different scales (pedon, hillslope, and catchment) were submitted and published. This Special Issue received investigations from different parts of the world such as Ethiopia, Morocco, China, Iran, Italy, Portugal, Greece and Spain, among others. We are happy to see that all papers presented findings characterized as unconventional, provo…
Time Scale Effects and Interactions of Rainfall Erosivity and Cover Management Factors on Vineyard Soil Loss Erosion in the Semi-Arid Area of Souther…
2019
Several authors describe the effectiveness of cover crop management practice as an important tool to prevent soil erosion, but at the same time, they stress on the high soil loss variability due to the interaction of several factors characterized by large uncertainty. In this paper the Revised Universal Soil Loss Equation (RUSLE) model is applied to two Sicilian vineyards that are characterized by different topographic factors
Real-Life Experiments based on IQRF IoT Testbed: From Sensors to Cloud
2018
Master's thesis Information- and communication technology IKT590 - University of Agder 2018 Internet of things (IoT) is the next generation internet technology which connects devices and objects intelligently to control data collected by diverse types of sensors, radio frequency identification and other physical objects. To address the challenges in IoT such as integrating artificial intelligent techniques with IoT concept, developing green IoT technologies and combining IoT and cloud computing, various platforms which support reliable and low power wireless connectivity are required. IQRF is a recently developed platform for wireless connectivity. It provides low power, low speed, reliable…
Ontology based study planning and classification of university subjects
2015
Masteroppgave informasjons- og kommunikasjonsteknologi - Universitetet i Agder, 2015 This is first and foremost a research project into study planning at the University of Agder. What tools are available for students now, and can an ontology help make it easier? Having a plan for your education is important, and not having proper tools for this can be a frustration for many students. In this thesis I propose an ontology aimed at helping students plan their studies, by giving a graphical presentation of how courses are linked together. I also look at current ways for students to plan their study, and compare them to the ontology. The focus of the ontology is primarily on the bachelors and ma…
Adaptive Backbone and Link Correlation based Data Transmission Schemes for Wireless Sensor Networks
2015
Masteroppgave informasjons- og kommunikasjonsteknologi - Universitetet i Agder, 2015 One of the main challenges faced by modern wireless sensor networks (WSN) is rapid energy depletion of individual sensor nodes. In many applications, sensor nodes are deployed in outdoor environments and it is difficult to replace or recharge node batteries. Depending on network topology and the transmission schemes implemented, certain nodes could have higher energy consumption compared with other nodes. In highly unbalanced load distributions this could lead to early total energy depletion of a critical node in the topology resulting in what is known as an energy hole in the network. Considering these fac…
Towards Automated Human Identification Using Dental X-ray Images
2015
Masteroppgave informasjons- og kommunikasjonsteknologi - Universitetet i Agder, 2015 Systems for automated human identification from dental X-ray images can be used to greatly reduce the necessary effort spent today by dental forensics experts. In this work a new methodology is proposed to create a system for automated dental X-ray identification. The methodology includes both state-of-the-art methods and a novel method for separating a dental X-ray image into individual teeth. The novel method is based on lowest cost pathfinding and is shown to achieve comparable results to the state-of-the-art. In experiments it is able to separate 88.7% of the teeth in the test images correctly. The iden…
Distributed Resource Allocation for Device-to-Device Communication in LTE/LTE-A Networks
2015
Masteroppgave informasjons- og kommunikasjonsteknologi - Universitetet i Agder, 2015 Currently, 3GPP is working on device-to-device (D2D) communica- tions, which is regarded as a part of 5G mobile communication systems. This thesis focuses on allocation of radio resources, based on a scenario where out-of-coverage user equipments (UEs) communicate with a base station (BS), through an user equipment relay (UE-R) located within the cell coverage. Two algorithms have been developed, one focusing on adjusting di erent parameters to achieve higher performance in the de- veloped system. Whilst the other algorithm targets at battery depended resource allocation including four battery control alloc…
Searchable Privacy-Enabled Information and Event Management Solution.
2015
Masteroppgave informasjons- og kommunikasjonsteknologi - Universitetet i Agder, 2015 With network traffic proliferating over the last couple of decades, there is an increasing need to monitor security information in order to prevent and resolve network security threats. A Security Information and Event Management (SIEM) solution collects all the alerts that the various Intrusion Detection and Prevention Systems (IDS/IDP or IDPS) generates, as well as security logs from various other systems, into one database so that the security analyst (SA) can more easily get an overview of the threat activity. A privacy enhanced anonymization and deanonymization protocol (Anonymiser/ Reversible Anonymis…
Towards Detecting Textual Plagiarism Using Machine Learning Methods
2015
Masteroppgave informasjons- og kommunikasjonsteknologi - Universitetet i Agder, 2015 Textual plagiarism is passing off someone else’s text as your own. The current state of the art in plagiarism detection performs well, but often uses a series of manually determined thresholds of metrics in order to determine whether an author is guilty of performing plagiarism or not. These thresholds are optimized for a single data set and are not optimal for all situations or forms of plagiarism. The detection methodologies also require a professional familiar with the algorithms in order to be properly adjusted, due to their complexity. Using a pre-classified data set, machine learning methods allow tea…