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Nowadays, we are surrounded by electric appliances. Either at home by the washing machine, kettle, or oven, or work by the computer, cellphone, or printer. Such devices help us daily, but their popularization increased the energy consumption to concerning values. In an attempt to reduce energy consumption, governments started enforcing policies regarding energy education to teach homeowners how to reduce energy wastage on the demand side. One of those policies was the deployment of smart meters, which allow the consumer to know how much energy is being consumed at any given time through a display on the household energy meter. Even though this measure was well received, the studies show that the best results in energy conservation are obtained through real-time appliance level feedback. To get such feedback, one can either measure every outlet in a household, which is unviable for a broad deployment solution, or disaggregate the energy recorded by the smart meter. NILM or Non-Intrusive Load Monitoring is the name we give to the second option where we use the aggregated readings of a household to find the energy consumed by each appliance. There were many proposals to solve NILM ranging from HMMs to GSP, where deep learning models showed remarkable results, obtaining state-of-the-art results. With the intent to create a complete NILM solution, Withus partnered with the University of Aveiro and proposed this dissertation. The initial objective was to develop a machine learning model to solve NILM. Still, during the background analysis, we found the need to create a new dataset which led to the expansion of the initial proposal to include the dataset preprocessing and conversion. Regarding NILM, we proposed three new deep learning models: a convolutional neural network with residual blocks, a recurrent neural network, and a multilayer perceptron that uses discrete wavelet transforms as features. These models went through multiple iterations, being evaluated first in the simpler ON/OFF classification task and later ...

This paper highlights how machine learning can help explain terrorism. We note that even though machine learning has a reputation for black box prediction, in fact, it can provide deeply nuanced explanations of terrorism. Moreover, machine learning is not sensitive to the sometimes heroic statistical assumptions necessary when parametric econometrics is applied to the study of terrorism. This increases the reliability of explanations while adding contextual nuance that captures the flavor of individualized case analysis. Nevertheless, this approach also gives us a sense of the replicability of results. We, therefore, suggest that it further expands the role of science in terrorism research.

This paper argues that machine learning is a knowledge-producing enterprise, since we are increasingly relying on artificial intelligence. But the knowledge discovered by machine is completely beyond human experience and human reason, becoming almost incomprehensible to humans. I argue that standard calls for interpretability that focus on the epistemic inscrutability of black-box machine learning may be misplaced. The problems of transparency and interpretability of machine learning stem from how we perceive the possibility of 'machine knowledge'. In other words, the justification for machine knowledge does not need to include transparency and interpretability. Therefore, I am going to examine some sort of machine learning epistemology and provide three possible justifications for machine knowledge, which are formal justification, model justification and practical justification.