EvoTanks: co-evolutionary development of game-playing agents

This paper describes the EvoTanks research project, a continuing attempt to develop strong AI players for a primitive 'Combat' style video game using evolutionary computational methods with artificial neural networks. A small but challenging feat due to the necessity for agent's actions to rely heavily on opponent behaviour. Previous investigation has shown the agents are capable of developing high performance behaviours by evolving against scripted opponents; however these are local to the trained opponent. The focus of this paper shows results from the use of co-evolution on the same population. Results show agents no longer succumb to trappings of local maxima within the search space and are capable of converging on high fitness behaviours local to their population without the use of scripted opponents

Interactions between selected metal compounds and marine heterotrophic bacteria

Bibliography: pages 122-131.A method was developed to test the toxicity of several metal compounds to selected bacteria. The technique was based on the agar diffusion method. Reliability and reproducibility were enhanced by careful standardisation of experimental parameters. By quantification of the concentration of metal compounds in the media using sequential strips of agar it was .possible to prepare standard graphs (metal concentration vs. distance from disc). These graphs demonstrated the exponential rate of diffusion of metals. The diffusion rates were metal specific. In the case of lead compounds the diffusion rate was poor. A media was developed which allowed lead chloride to diffuse relatively well

The vertical structure of upper ocean variability at the Porcupine Abyssal Plain during 2012-2013

This study presents the characterization of variability in temperature, salinity and oxygen concentration, including the vertical structure of the variability, in the upper 1000m of the ocean over a full year in the northeast Atlantic. Continuously profiling ocean gliders with vertical resolution between 0.5-1m provide more information on temporal variability throughout the water column than time series from moorings with sensors at a limited number of fixed depths. The heat, salt and dissolved oxygen content are quantified at each depth. While the near surface heat content is consistent with the net surface heat flux, heat content of the deeper layers is driven by gyre-scale water mass changes. Below ~150m, heat and salt content display intraseasonal variability which has not been resolved by previous studies. A mode-1 baroclinic internal tide is detected as a peak in the power spectra of water mass properties. The depth of minimum variability is at ~415m for both temperature and salinity, but this is a depth of high variability for oxygen concentration. The deep variability is dominated by the intermittent appearance of Mediterranean Water, which shows evidence of filamentation. Susceptibility to salt fingering occurs throughout much of the water column for much of the year. Between about 700-900m, the water column is susceptible to diffusive layering, particularly when Mediterranean Water is present. This unique ability to resolve both high vertical and temporal resolution highlights the importance of intraseasonal variability in upper ocean heat and salt content, variations that may be aliased by traditional observing techniques

Sharing and modifying stories in neonatal peer support: an international mixed‐methods study

While shared personal experiences are a valued prerequisite of the peer supporter–service‐user relationship, they have the potential to create harm. There are challenges in peer supporters being emotionally ready to hear the experiences of others, and how much personal information peers should disclose. As part of an international study that aimed to explore how peer supporters who worked in a neonatal context (providing support to parents whose infant(s) has received neonatal care) were trained and supported, new insights emerged into how peers’ personal stories were used and modified to instil boundaries in peer support services. In this paper, we report on a secondary analysis of the data to describe how peer supporters’ stories were valued, used, assessed and moderated in neonatal peer support services; to safeguard and promote positive outcomes for peers and parents. Following University ethics approval, a mixed‐methods study comprising online surveys and follow‐up interviews was undertaken. Surveys were distributed through existing contacts and via social media. Thirty‐one managers/coordinators/trainers and 77 peer supporters completed the survey from 48 peer support services in 16 different countries, and 26 interviews were held with 27 survey respondents. Three themes describe variations in the types of stories that were preferred and when peers were perceived to be ‘ready’ to share them; the different means by which sharing personal accounts was encouraged and used to assess peer readiness; and the methods used to instil (and assess) boundaries in the stories the peers shared. In neonatal‐related peer support provision, the expected use of peer supporters’ stories resonates with the ‘use of self’ canon in social work practice. Peer supporters were expected to modify personal stories to ensure that service‐user (parents) needs were primary, the information was beneficial, and harm was minimised. Further work to build resilience and emotional intelligence in peer supporters is neede

Impact of Colored Noise on the Acute Stress Response

In psychoacoustics, noise can be categorized as different ‘colors’, which refers to the varying power and spread of noise signals over the spectrum of sound frequencies. White noise contains all frequencies at equal volumes, and pink noise, in which the power spectral density of the sound is inverse to the frequency. Both have been studied for their effects on sleep and relaxation. However, little research exists on the topic of colored noise usage for stress reduction and the effects it may have on the acute stress response.https://digitalcommons.morris.umn.edu/urs_2023/1000/thumbnail.jp

The Islington ‘doing what counts: measuring what matters'

The report evaluates the success of the project which aimed to improve outcomes for children and families that involved a statutory assessment of need in the London Borough of Islington