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Articles 39781 - 39794 of 39794
Full-Text Articles in Entire DC Network
Electrical Characterization Of The Alleged Bio-Memristor Physarum Polycephalum, Markus Schmidt, Günter Seyfried, Uliana Reutina, Zeki Seskir, Eduardo R. Miranda
Electrical Characterization Of The Alleged Bio-Memristor Physarum Polycephalum, Markus Schmidt, Günter Seyfried, Uliana Reutina, Zeki Seskir, Eduardo R. Miranda
School of Art, Design and Architecture
This study investigates the potential of the slime mold Physarum polycephalum to function as a bio-memristor. In contrast to earlier reports, our experimental results did not show a significant memristive behavior. Instead, all tested slime molds exhibited elliptical I-V characteristics, attributed to their inherent capacitance. To model this behavior, we developed replacement circuits consisting solely of resistors and capacitors, which accurately reproduced the observed results. While these circuits lack memristive properties, they demonstrate potential utility as sub-circuits in analog applications, such as filters, timing circuits, and phase shift networks. Despite it not being a memristor, P. polycephalum may hold promise …
Community, Culture, And Capacity: Transformative Governance In The Gold Coast World Surfing Reserve, Kizzy Beaumont, Andrew Mckinnon, Scott Gillies
Community, Culture, And Capacity: Transformative Governance In The Gold Coast World Surfing Reserve, Kizzy Beaumont, Andrew Mckinnon, Scott Gillies
School of Art, Design and Architecture
Executive summary This report presents findings from interviews and a focus group held in September 2024 with stakeholders involved in the Gold Coast World Surfing Reserve (WSR). Participants shared perspectives on the evolution of the WSR, its governance structures, and its role in balancing surf culture, community needs, and environmental sustainability on one of Australia’s most urbanised coastlines.Participants praised the WSR Stewardship Committee, Council leadership, and strong data partnerships with universities. However, concerns were raised about increasing surf congestion, tourism pressure, development impacts, and the lack of formal legal protections for surf zones. The region’s surf culture was described as …
Relationships Between Sediment Size Distribution And Microplastic Abundance And Characteristics Along The Strandline Of A Sandy Embayment (Whitsand, Southwest England), Oliver J. Fenn, Edward J. Walklett, Andrew Turner
Relationships Between Sediment Size Distribution And Microplastic Abundance And Characteristics Along The Strandline Of A Sandy Embayment (Whitsand, Southwest England), Oliver J. Fenn, Edward J. Walklett, Andrew Turner
School of Geography, Earth and Environmental Sciences
Beach sediments taken from 1 m2 areas of strandline across an embayment in southwest England (Whitsand) have been analysed for grain size distribution and elemental content. Large (1–5 mm) and small (< 1 mm) microplastics were isolated by sieving and flotation in NaBr solution, respectively, and characterised by size, shape, colour and polymeric makeup. Sediments displayed varying median diameters and degrees of sorting but distributions were always positively skewed. Concentrations of Fe, K, Mn and Ti were relatively invariant, but Ca concentrations exhibited heterogeneous distributions across the bay. Large microplastics were largely composed of polyolefin-based pre-production pellets, bio-beads and fragments whose numbers were correlated with each other. Positive and inverse relationships between beads and sediment skewness and sorting, respectively, suggests that deposition of this type of plastic is favoured where sediment is well-sorted and contains a high proportion of fine material. Small microplastics were dominated by fragments and fibres <200 μm in size composed of a broader array of polymers (including epoxy resin, polyetherimide and polyvinyl alcohol). Fibres exhibited an inverse relationship with bead and pellet abundance but there was no evidence of dependency on grain size distribution, and their presence is attributed to entrapment in interstitial spaces between sediment grains. Compositional differences between large (1–5 mm) and small (< 1 mm) microplastic fragments suggests they are derived from different sources, with the former coupled with pellet and bead deposition and the latter small enough to be retained in interstitial spaces with fibres. However, a positive relationship between mean (small) fragment size and median sediment diameter suggests that their retention is more constrained by interstitial space than fibres. The study provides evidence that microplastics of different size and shape behave differently but are, ultimately, related to or controlled by sediment size distribution in the coastal littoral zone.
Interactions Of Anthropogenic Microfibres With The Marine Macroalga, Ulva Lactuca, Adam Collins, Andrew Turner
Interactions Of Anthropogenic Microfibres With The Marine Macroalga, Ulva Lactuca, Adam Collins, Andrew Turner
School of Geography, Earth and Environmental Sciences
Little information exists on the interactions between microfibres (MFs) and marine macroalgae. In this study, the translucent green seaweed, Ulva lactuca, has been exposed to ∼2 mg L−1 suspensions of MFs prepared from dryer lint under controlled conditions, with MFs on the alga surface and remaining in seawater subsequently counted and characterised. MFs were mainly <2 mm and cellulosic, and contained various additives and chemicals used in textile treatment. Interactions of MFs with U. lactuca were spatially heterogeneous but correcting for pre-existent MFs on the surface, mean trapping efficiencies on a dry mass and surface area basis were 252 mL g−1 and 0.858 mL cm−2, respectively. Despite this heterogeneity, there was evidence of differential trapping based on fibre colour and length. Interactions between the amphiphilic algal surface and MFs are likely both hydrophobic and electrostatic and are not fully reversible, with only …
A Systematic Review Of Biomonitoring Microplastics In Environmental Matrices: Emphasis On Airborne Particles, Dry Deposits, And Comparative Analysis With Traditional Methods, Faezeh Jahedi, Neamatollah Jaafarzadeh Haghighi Fard, Andrew Turner
A Systematic Review Of Biomonitoring Microplastics In Environmental Matrices: Emphasis On Airborne Particles, Dry Deposits, And Comparative Analysis With Traditional Methods, Faezeh Jahedi, Neamatollah Jaafarzadeh Haghighi Fard, Andrew Turner
School of Geography, Earth and Environmental Sciences
The use of plastics continues to rise each year due to their versatility and essential role in industries like manufacturing, agriculture, and food packaging. However, plastics present a serious environmental challenge because they take over 500 years to decompose. During this time, they break down into tiny particles known as microplastics (MPs), which are now found everywhere, water, soil, and even the air we breathe. Recently, researchers have even detected MPs in clouds, making their presence in the atmosphere a growing concern for both the environment and public health. Traditional methods for sampling MPs in the air, such as active …
Field Learning And Employability In Geography, Earth, And Environmental Sciences, Jacqueline Dohaney, Alison Stokes
Field Learning And Employability In Geography, Earth, And Environmental Sciences, Jacqueline Dohaney, Alison Stokes
School of Geography, Earth and Environmental Sciences
Society needs talented Geography, Earth and Environmental Sciences (GEES) graduates to help address global challenges, but the pathway to professional employment is seldom easy. After graduation, most GEES graduates enter professions requiring broad transferable skills and 'value-added' experiences to thrive in the modern workforce. GEES educators can therefore enhance employability by using field experiences to introduce and develop transferable skills valued by employers. Here, we define employability for our context, explore GEES graduate skills and describe the ways that communication, project management and personal and professional skills can be embedded in field experiences guided by the available literature. We identify …
Ecological Dynamics In Beaver-Engineered Boreal Wetlands: Amphibian Phenology, Occupancy, And Aquatic Macroinvertebrate Communities, Talon Stammen
Ecological Dynamics In Beaver-Engineered Boreal Wetlands: Amphibian Phenology, Occupancy, And Aquatic Macroinvertebrate Communities, Talon Stammen
Theses and Dissertations
Boreal wetlands are ecologically rich yet vulnerable ecosystems shaped by hydrological dynamics, cold climate regimes, and landscape-scale disturbances. Among the most influential agents of change in these systems are beavers (Castor canadensis), whose engineering activities create a mosaic of lentic habitats at varying stages of ecological succession. This dissertation investigates the structure and dynamics of amphibian and aquatic macroinvertebrate communities across a beaver-influenced wetland landscape in Voyageurs National Park, Minnesota, USA.The first study (Chapter II) examines breeding phenology and detection patterns of boreal anurans using a combination of passive acoustic monitoring and visual encounter surveys at 25 wetlands over four …
Do Food Planner Apps Enhance Responsible Food Consumption? The Impact Of Perceptual Antecedents And Moderating Effects On Usage Intention, Rajat Subhra Chatterjee, Irfan Hameed, Ranjan Chaudhuri, Demetris Vrontis, Sumana Chaudhuri, Sheshadri Chatterjee
Do Food Planner Apps Enhance Responsible Food Consumption? The Impact Of Perceptual Antecedents And Moderating Effects On Usage Intention, Rajat Subhra Chatterjee, Irfan Hameed, Ranjan Chaudhuri, Demetris Vrontis, Sumana Chaudhuri, Sheshadri Chatterjee
Plymouth Business School
Purpose: A food planner app helps users to create meal plans and recipes to their preferences, dietary requirements and lifestyle needs. Many food planner apps also could assist with grocery lists, calorie tracking, food waste management and reminders to users. But there is less adoption of such apps. Limited studies examine reasons for non-adaptability, emphasizing the need for more research. This research addresses this gap by observing the effect of pertinent factors such as expectant outcome and openness to change on the extended technology acceptance model. Design/methodology/approach: Drawing on theories and extant literature, a theoretical model was developed. The model …
The Necessity Of Electric School Bus: A Comparative Study Of Myanmar And Vietnam, Yang Ho Lee, Saeyeon Roh, Jin Woong Yoo
The Necessity Of Electric School Bus: A Comparative Study Of Myanmar And Vietnam, Yang Ho Lee, Saeyeon Roh, Jin Woong Yoo
Plymouth Business School
Purpose: This research aims to ascertain key factors which influence the necessity of South Korean electric school buses in Myanmar and Vietnam. The interest in business sustainability and the demand for electric or safe school buses are increasing in Myanmar and Vietnam. Design/methodology/approach: As quantitative research, this study relies on a non-probability sampling method to collect data sets from experts in both countries. As this research covers three steps, including 1) literature reviews, 2) preliminary analysis and 3) Consistent Fuzzy Preference Relations (CFPR) analysis, robust outcomes were found and established in this study. Findings: Among five driving factors, including 1) …
Mesotopia: Towards A Place Of Lyrical Inquiry, Tristan Verran
Mesotopia: Towards A Place Of Lyrical Inquiry, Tristan Verran
School of Art, Design and Architecture Theses
This research project is a comprehensive investigation into the practical applications of a theoretical place of creative intuition I have called ‘the mesotopia’. A mesotopia is a place between conceptual and physical terrains in which inter-object experiential encounters are turned into communicative events. Mesotopian thinking unsettles purely anthropocentric utopian or dystopian future visions, as well as romantic images of Arcadian pasts. I have been attending to the material present of our coastal regions while attempting to intuit, rather than imagine, concealed aspects of these compositional sites. This thesis argues that attending to local environments using a more embodied form of …
Un-Framing Transiting Trajectories: A ‘Beyond Disciplinary’ Approach To Curating In The Context Of Art And Science Discourse, Christina Ioanna Kazakou
Un-Framing Transiting Trajectories: A ‘Beyond Disciplinary’ Approach To Curating In The Context Of Art And Science Discourse, Christina Ioanna Kazakou
School of Art, Design and Architecture Theses
Abstract
The Impact Of Talent Management On Process Innovation Implementation In The Upstream Oil And Gas Sector, Salim Al Daraai
The Impact Of Talent Management On Process Innovation Implementation In The Upstream Oil And Gas Sector, Salim Al Daraai
Plymouth Business School Theses
The oil and gas industry is vital industry in the world. Specifically, the upstream sector of the oil and gas industry plays a crucial role in the global economy, serving as a primary source of energy and revenue generation. It involves exploration and development activities, where exploration involves identifying petroleum resources, including drilling and seismic surveys. In contrast, production involves a way to extract petroleum from the ground. Moreover, the oil and gas industry is highly competitive and rapidly evolving. Process innovation implementation plays an important role in the success and sustainability of organizations in the oil and gas industries. …
Tourists’ Immersive Experiences At Dark Tourism Destinations: The Role Of The Spiritualist Medium, Andrew Fry
Tourists’ Immersive Experiences At Dark Tourism Destinations: The Role Of The Spiritualist Medium, Andrew Fry
Plymouth Business School Theses
While immersive experience and dark tourism are established fields, little research has examined how spiritualist mediums shape belief-led, emotionally resonant encounters at historically charged sites. This thesis addresses that gap by investigating how mediums influence emotional engagement, interpretive depth, and perceptions of authenticity. Centred on Bodmin Jail’s After Dark Event, the study adopts a sequential mixed-methods design and integrates quantitative patterns with qualitative mechanisms through joint QUAN–QUAL displays. Findings show that mediumship helps convert arousal into reflective meaning through ritual participation, atmospheric design, and interpretive trust. Anticipated theatricality heightened arousal and “staging” attributions, yet felt authenticity was sustained when the …
Academic Stress, Performance, And Satisfaction Among Undergraduate Nursing Students Under The Semester System, Kalyani Sinha, Sangeetha Priyadarshini, Baby S Nayak, Meghna Pandit
Academic Stress, Performance, And Satisfaction Among Undergraduate Nursing Students Under The Semester System, Kalyani Sinha, Sangeetha Priyadarshini, Baby S Nayak, Meghna Pandit
Manipal Journal of Nursing and Health Sciences
Introduction: Stress is a key indicator of psychological well being. Various factors contribute to the psychological disturbances among undergraduate students. These issues can affect academic satisfaction and increase stress. Examination-related stress negatively impacts students’ academic performance. Each course determines its assessment methods, content, learning strategies and instructional approaches. Objectives: This study assessed academic stress, performance, and satisfaction among undergraduate nursing students in the semester system at selected nursing colleges in Udupi District, Karnataka and find it’s relationship. Method: A descriptive study was conducted among 210 undergraduate students selected from the second and fourth semesters using a purposive sampling …