List of Titles

Memory-Based explainable reinforcement learning

- Cruz, Francisco, Dazeley, Richard, Vamplew, Peter

Authors: Cruz, Francisco , Dazeley, Richard , Vamplew, Peter
Date: 2019
Type: Text , Conference proceedings
Relation: 32nd Australasian Joint Conference on Artificial Intelligence AI , Switzerland, 2019 in AI 2019 ; Advances in artificial intelligence ; published in Lecture Notes in Computer Science, vol 11919 , pp.66-77
Full Text: false
Description: Reinforcement learning (RL) is a learning approach based on behavioral psychology used by artificial agents to learn autonomously by interacting with their environment. An open issue in RL is the lack of visibility and understanding for end-users in terms of decisions taken by an agent during the learning process. One way to overcome this issue is to endow the agent with the ability to explain in simple terms why a particular action is taken in a particular situation. In this work, we propose a memory-based explainable reinforcement learning (MXRL) approach. Using an episodic memory, the RL agent is able to explain its decisions by using the probability of success and the number of transactions to reach the goal state. We have performed experiments considering two variations of a simulated scenario, namely, an unbounded grid world with aversive regions and a bounded grid world. The obtained results show that the agent, using information extracted from the memory, is able to explain its behavior in an understandable manner for non-expert end-users at any moment during its operation.

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Online romance scam: Expensive e-living for romantic happiness

- Kopp, Christian, Sillitoe, James, Gondal, Iqbal, Layton, Robert

Authors: Kopp, Christian , Sillitoe, James , Gondal, Iqbal , Layton, Robert
Date: 2016
Type: Text , Conference proceedings
Relation: Proceedings of the 29th Bled eConference: Digital Economy (BLED 2016), Slovenia, pp.175-189 p. 15
Full Text:
Description: The Online Romance Scam is a very successful scam which causes considerable financial and emotional damage to its victims. It is based on building a relationship which establishes a deep trust that causes victims to voluntarily transfer funds to the scammer. The aim of this research is to explore online dating scams as a type of e-Living which initially creates happiness for the victim in a virtual romantic relationship, but tragically then causes the victim to be separated from his or her savings. Using narrative research methodology, this research will establish a model of the romance scam structure and its variations regarding human romantic attitudes, and will develop a theory which explains how the victim is moved through the phases of the scam. Findings of this research will contribute to the knowledge of the Online Romance Scam as e-Crime and provide information about the structure and the development of the modus operandi which can be used to identify an online relationship as a scam at an early phase in order to prevent significant harm to the victim.

Abrupt onset of carbonate deposition in Lake Kivu during the 1960s: Response to recent environmental changes

- Pasche, Natacha, Alunga, Georges, Mills, Keely, Muvundja, Fabrice, Ryves, David, Schurter, Michael, Wehrli, Bernard, Schmid, Martin

Authors: Pasche, Natacha , Alunga, Georges , Mills, Keely , Muvundja, Fabrice , Ryves, David , Schurter, Michael , Wehrli, Bernard , Schmid, Martin
Date: 2010
Type: Text , Journal article
Relation: Journal of Paleolimnology Vol. 44, no. 4 (2010), p. 931-946
Full Text: false
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Description: This study interprets the recent history of Lake Kivu, a tropical lake in the East African Rift Valley. The current gross sedimentation was characterized from a moored sediment trap array deployed over 2 years. The past net sedimentation was investigated with three short cores from two different basins. Diatom assemblages from cores were interpreted as reflecting changes in mixing depth, surface salinity and nutrient availability. The contemporary sediment trap data indicate seasonal variability, governed by diatom blooms during the annual mixing in the dry season, similar to Lakes Malawi and Tanganyika. The ratio of settling fluxes to net sediment accumulation rates implies mineralization rates of 80-90% at the sediment-water interface. The sediment cores revealed an abrupt change ~40 years ago, when carbonate precipitation started. Since the 1960s, deep-water methane concentrations, nutrient fluxes and soil mineral inputs have increased considerably and diatom assemblages have altered. These modifications probably resulted from a combination of three factors, commonly altering lake systems: the introduction of a non-native fish species, eutrophication, and hydrological changes inducing greater upwelling. Both the fish introduction and increased rainfall occurred at the time when the onset of carbonate precipitation was observed, whereas catchment population growth accompanied by intensified land use increased the flux of soil minerals already since the early twentieth century due to more intense erosion. Â© 2010 Springer Science+Business Media B.V.

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