155,355 research outputs found
Measurement of body temperature and heart rate for the development of healthcare system using IOT platform
Health can be define as a state of complete mental, physical and social well-being and not merely the absence of disease or infirmity according to the World Health Organization (WHO) [1]. Having a healthy body is the greatest blessing of life, hence healthcare is required to maintain or improve the health since the healthcare is the maintenance or improvement of health through the diagnosis, prevention, and treatment of injury, disease, illness, and other mental and physical impairments in human beings. The novel paradigm of Internet of Things (IoT) has the potential to transform modern healthcare and improve the well-being of entire society [2].
IoT is a concept aims to connec
Pictorial Socratic dialogue and conceptual change
Counter-examples used in a Socratic dialogue aim to provoke reflection to effect conceptual changes. However, natural language forms of Socratic dialogues have their limitations. To address this problem, we propose an alternative form of Socratic dialogue called the pictorial Socratic dialogue. A Spring Balance System has been designed to provide a platform for the investigation of the effects of this pedagogy on conceptual changes. This system allows learners to run and observe an experiment. Qualitative Cartesian graphs are employed for learners to represent their solutions. Indirect and intelligent feedback is prescribed through two approaches in the pictorial Socratic dialogue which aim to provoke learners probe through the perceptual structural features of the problem and solution, into the deeper level of the simulation where Archimedes’ Principle governs
Eclectic Rule Extraction for Explainability of Deep Neural Network based Intrusion Detection Systems
This paper addresses trust issues created from the ubiquity of black box
algorithms and surrogate explainers in Explainable Intrusion Detection Systems
(X-IDS). While Explainable Artificial Intelligence (XAI) aims to enhance
transparency, black box surrogate explainers, such as Local Interpretable
Model-Agnostic Explanation (LIME) and SHapley Additive exPlanation (SHAP), are
difficult to trust. The black box nature of these surrogate explainers makes
the process behind explanation generation opaque and difficult to understand.
To avoid this problem, one can use transparent white box algorithms such as
Rule Extraction (RE). There are three types of RE algorithms: pedagogical,
decompositional, and eclectic. Pedagogical methods offer fast but untrustworthy
white-box explanations, while decompositional RE provides trustworthy
explanations with poor scalability. This work explores eclectic rule
extraction, which strikes a balance between scalability and trustworthiness. By
combining techniques from pedagogical and decompositional approaches, eclectic
rule extraction leverages the advantages of both, while mitigating some of
their drawbacks. The proposed Hybrid X-IDS architecture features eclectic RE as
a white box surrogate explainer for black box Deep Neural Networks (DNN). The
presented eclectic RE algorithm extracts human-readable rules from hidden
layers, facilitating explainable and trustworthy rulesets. Evaluations on
UNSW-NB15 and CIC-IDS-2017 datasets demonstrate the algorithm's ability to
generate rulesets with 99.9% accuracy, mimicking DNN outputs. The contributions
of this work include the hybrid X-IDS architecture, the eclectic rule
extraction algorithm applicable to intrusion detection datasets, and a thorough
analysis of performance and explainability, demonstrating the trade-offs
involved in rule extraction speed and accuracy
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Artificial intelligence makes computers lazy
This paper looks at the age-old problem of trying to instil some degree of intelligence in computers. Genetic Algorithms (GA) and Genetic Programming (GP) are techniques that are used to evolve a solution to a problem using processes that mimic natural evolution. This paper reflects on the experience gained while conducting research applying GA and GP to two quite different problems: Medical Diagnosis and Robot Path Planning. An observation is made that when these algorithms are not applied correctly the computer seemingly exhibits lazy behaviour, arriving at a suboptimal solutions. Using examples, this paper shows how this 'lazy' behaviour can be overcome
Computing the Shapley value in allocation problems: approximations and bounds, with an application to the Italian VQR research assessment program
In allocation problems, a given set of goods are assigned to agents in such a way that the social welfare is maximised, that is, the largest possible global worth is achieved. When goods are indivisible, it is possible to use money compensation to perform a fair allocation taking into account the actual contribution of all agents to the social welfare. Coalitional games provide a formal mathematical framework to model such problems, in particular the Shapley value is a solution concept widely used for assigning worths to agents in a fair way. Unfortunately, computing this value is a #P-hard problem, so that applying this good theoretical notion is often quite difficult in real-world problems.
We describe useful properties that allow us to greatly simplify the instances of allocation problems,
without affecting the Shapley value of any player. Moreover, we propose algorithms for computing lower bounds and upper bounds of the Shapley value, which in some cases provide the exact result and that can be combined with approximation algorithms.
The proposed techniques have been implemented and tested on a real-world application of allocation problems, namely, the Italian research assessment program known as VQR (Verifica della QualitĂ della Ricerca, or Research Quality Assessment)1. For the large university considered in the experiments, the
problem involves thousands of agents and goods (here, researchers and their research products). The
algorithms described in the paper are able to compute the Shapley value for most of those agents, and to
get a good approximation of the Shapley value for all of the
Preceding rule induction with instance reduction methods
A new prepruning technique for rule induction is presented which applies instance reduction before rule induction. An empirical evaluation records the predictive accuracy and size of rule-sets generated from 24 datasets from the UCI Machine Learning Repository. Three instance reduction algorithms (Edited Nearest Neighbour, AllKnn and DROP5) are compared. Each one is used to reduce the size of the training set, prior to inducing a set of rules using Clark and Boswell's modification of CN2. A hybrid instance reduction algorithm (comprised of AllKnn and DROP5) is also tested. For most of the datasets, pruning the training set using ENN, AllKnn or the hybrid significantly reduces the number of rules generated by CN2, without adversely affecting the predictive performance. The hybrid achieves the highest average predictive accuracy
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Artificial Intelligence, International Competition, and the Balance of Power (May 2018)
World leaders, CEOs, and academics have suggested that a revolution in artificial intelligence is upon us. Are they right, and what will advances in artificial intelligence mean for international competition and the balance of power? This article evaluates how developments in artificial intelligence (AI) — advanced, narrow applications in particular — are poised to influence military power and international politics. It describes how AI more closely resembles “enabling” technologies such as the combustion engine or electricity than a specific weapon. AI’s still-emerging developments make it harder to assess than many technological changes, especially since many of the organizational decisions about the adoption and uses of new technology that generally shape the impact of that technology are in their infancy. The article then explores the possibility that key drivers of AI development in the private sector could cause the rapid diffusion of military applications of AI, limiting first-mover advantages for innovators. Alternatively, given uncertainty about the technological trajectory of AI, it is also possible that military uses of AI will be harder to develop based on private-sector AI technologies than many expect, generating more potential first-mover advantages for existing powers such as China and the United States, as well as larger consequences for relative power if a country fails to adapt. Finally, the article discusses the extent to which U.S. military rhetoric about the importance of AI matches the reality of U.S. investments.LBJ School of Public Affair
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