508 research outputs found
Strategies for Developing Sustainable Design Practice for Students and SME Professionals
Designers and engineers seem finally to be awakening to the challenge that sustainable development has given. Educators and students alike are keenly aware of the need to become more effective in the training and practice of their specific disciplines with respect to sustainability. \noindent In the past four years since this research has developed, there has been a marked change in the mass market appeal for sustainable products and services. Implementation of sustainable design practice from both recent graduates and also innovative small and medium enterprises (SMEs) at a local level is slow. One would assume that the consumer drive would push a change in design practice but perhaps the complexities of sustainable design along with the lack of experience in the field are providing barriers to designers and marketers alike. In addition the SME sector alone makes up the bulk of industry within the European Union (EU) varying in some countries from 80-95% of the total numbers of companies (Tukker et al. 2000). These industries by their nature find it difficult to dedicate expertise solely to sustainable development issues. The strategy outlined in this paper intended to introduce concepts of sustainable design thinking and practice to both SMEs and undergraduate students. \noindent This current and ongoing research qualitatively assesses appropriate models for educating for sustainable design thinking with SME employees and undergraduate design students. The sample groups include Industrial Design and Product Design undergraduate students in Ireland at the Institute of Technology, Carlow (IT Carlow), The University of Limerick (UL) and a sample of SMEs in the South East of Ireland, with broad national participation from other students of design and professionals from industry. Current levels of understanding of students and SME professionals of key environmental and social issues are measured
NETLAKE guidelines for automated monitoring system development. Station maintenance (Factsheet 012).
NETLAKE guidelines for automated monitoring system development. Factsheet 001: options for buoy design.
In this factsheet, we describe some of the options that can be used to house an automatic monitoring station (AMS) on a lake
NETLAKE guidelines for automated monitoring system development. Factsheet 007: Communication options.
The purpose of this fact sheet is to provide some advice on the available methods to communicate with and retrieve data from your automated monitoring system
NETLAKE guidelines for automated monitoring system development. How to deploy a low cost option (Factsheet 003).
In this factsheet, we give an overview of one “low cost” platform system
Assessing usability of a prototype soft exoskeleton by involving people with gait impairments
Background: Gait impairment is prevalent among many growing clinical populations e.g. people with stroke, incomplete spinal cord injury (iSCI), older adults etc. Such populations may benefit from assistive devices such as exoskeletons to improve their walking ability. XoSoft (www.xosoft.eu) is a soft exoskeleton that is being developed for people with mild to moderate gait impairments to support their mobility by providing physical actuation across joints of the lower extremities. During the design and development of a device like XoSoft, it is crucial that Primary Users (PUs, e.g. patients) are involved and provide insight into their experiences and expectations regarding device usability. However, it is still not standard practice to include PUs in rigorous testing of highly technical exoskeletons. The XoSoft consortium took an iterative design approach to the development of the XoSoft prototypes. Data from usability testing with PUs are informing next iterations of the XoSoft concepts.
Purpose: The purpose of this study was to assess the PU experiences of the usability of a XoSoft prototype. This study should also highlight the importance of including PUs during the development of assistive devices.
Methods: Eleven participants were recruited (mean age: 73 years, mean height: 166 cm, mean mass: 65 kg). There were three categories of PUs: frail (n=5), stroke (n=1), iSCI (n=5). Participants had no cognitive impairment (Mini Mental State Examination score > 24). The prototype consisted of a leggings-style garment with Velcro straps as anchor points for actuators across the relevant joints (hip, knee, ankle). Actuation and control was provided by a modular pneumatic/sensor controlled system, which was added to the garment in modular fashion based on the PU needs. After independent donning and doffing by the participant, the garment was donned and the Velcro straps placed and secured by a researcher to ensure proper placement. Participants then performed walking tasks with active actuation followed by completion of the System Usability Scale (SUS, Brooke 1996, maximum score = 100).
Results: The scores for the SUS ranged from zero to 95 with a median rating of 52.5. The median rating corresponds to an “okay” score. According to the acceptability ranges by Bangor et al. (2008), 3 participants rated the prototype as acceptable, 3 as marginal, and 5 as not acceptable.
Conclusions: The scores indicate the need for improvement in the design of future XoSoft prototypes. The large variability in SUS scores indicated that the same device may be rated considerably differently by different users. This highlights the importance of including a variety of potential users of assistive devices during development.
Implications: Secondary Users (SUs) such as physical therapists are also involved in the development of XoSoft, providing insight into their own needs and the needs of their patients. The therapists also play a key role in motivating their patients to participate in research and development projects. To ensure that such assistive devices can be integrated into users’ lives and practices, it is essential to have both PUs and SUs actively involved in the technical development
Selection and phylogenetics of salmonid MHC class I: wild brown trout (Salmo trutta) differ from a non-native introduced strain
We tested how variation at a gene of adaptive importance, MHC class I (UBA), in a wild, endemic Salmo trutta population compared to that in both a previously studied non-native S. trutta population and a co-habiting Salmo salar population ( a sister species). High allelic diversity is observed and allelic divergence is much higher than that noted previously for cohabiting S. salar. Recombination was found to be important to population-level divergence. The alpha 1 and alpha 2 domains of UBA demonstrate ancient lineages but novel lineages are also identified at both domains in this work. We also find examples of recombination between UBA and the non-classical locus, ULA. Evidence for strong diversifying selection was found at a discrete suite of S. trutta UBA amino acid sites. The pattern was found to contrast with that found in re-analysed UBA data from an artificially stocked S. trutta population
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Substantial increase in minimum lake surface temperatures under climate change
The annual minimum of lake surface water temperature influences ecological and biogeochemical processes, but variability and change in this extreme has not been investigated. Here, we analysed observational data from eight European lakes and investigated the changes in annual minimum surface water temperature. We found that, between 1973 and 2014, the annual minimum lake surface temperature has increased at an average rate of +0.35°C decade-1; comparable to the rate of summer average lake surface temperature change during the same period (+0.32°C decade-1). Coherent responses to climatic warming are observed between the increase in annual minimum lake surface temperature and the increase in winter air temperature variations. As a result of the rapid warming of annual minimum lake surface temperatures, some of the studied lakes no longer reach important minimum surface temperature thresholds that occur in winter, with complex and significant potential implications for lakes and the ecosystem services that they provide
Effects of weather-related episodic events in lakes: an analysis based on high-frequency data
1. Weather-related episodic events are typically unpredictable, and their duration is often short. Abiotic and biological responses are often missed in routine monitoring. These responses are, however, now of particular relevance given projected changes in extreme weather conditions.
2. We present data from high-frequency monitoring stations from lakes in Europe, North America and Asia that illustrate two classes of abiotic effects of weather events: (i) generally short-lived effects of storms on lake thermal structure and (ii) the more prolonged effects of high rainfall events on dissolved organic matter levels and water clarity. We further relate these abiotic effects to changes in dissolved oxygen or in chlorophyll a levels.
3. Three differing causes for weather-related decreases in surface dissolved oxygen levels were observed: (i) entrainment of anoxic water from depth, (ii) reduction in primary productivity and (iii) increased mineralisation of organic carbon delivered from the catchment.
4. The duration of in-lake effects tended to be longer for events driven by weather conditions with a longer return period, that is, conditions that were relatively more severe and less frequent at a site. While the susceptibility of lakes to change was related in part to the severity of the meteorological drivers, the impacts also depended on site-specific factors in some cases.
5. The availability of high-frequency data at these sites provided insight into the capacity of the lakes to absorb current and future pressures. Several of the changes we observed, including increases in carbon availability, decreases in photosynthetically active radiation and increased disturbance, have the capacity to shift lakes towards an increased degree of heterotrophy. The magnitude and direction of any such change will, however, also depend on the magnitude and direction of climate change for a given location and on lake and catchment characteristics
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Lake surface temperature [in “State of the Climate in 2017”]
Observed lake surface water temperature anomalies
in 2017 are placed in the context of the recent
warming observed in global surface air temperature
by collating long-term in situ lake
surface temperature observations from some of the
world’s best-studied lakes and a satellite-derived
global lake surface water temperature dataset. The
period 1996–2015, 20 years for which satellite-derived
lake temperatures are available, is used as the base
period for all lake temperature anomaly calculations
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