Digital Commons Network^™

Study Of Microstructure And Mechanical Properties Of As-Built And Heat-Treated Additive Manufactured Inconel 718 Alloy, Maurya Ajay Kumar, Kumar Amit

ASEAN Journal on Science and Technology for Development

Additive manufacturing technology is becoming popular in the industry because it allows the manufacturer to fabricate cost-effective, strong, lightweight, and complex-shaped parts directly from 3D design data as compared with the conventional manufacturing method. Inconel 718 alloy is the most demanding material in aviation as well as in the automobile industry, in terms of manufacturing high-performance parts. In this study, Inconel 718 samples were built using the direct metal laser sintering process, and standard heat treatment was performed on the samples to improve their microstructure and mechanical properties. The as-built samples exhibited good grain structure with fine laves phases, but …

Review—Concentration Measurements In Molten Chloride Salts Using Electrochemical Methods, Tyler Williams, Rankin Shum, Devin Rappleye

Faculty Publications

The electrochemical measurement of concentration in molten chloride salts is a valuable tool for the control of existing and potential industrial processes, recycling of precious materials and energy production. The electrochemical techniques commonly used to measure concentration and each techniques’ associated theory are discussed. Practices which improve measurement accuracy and precision are set forth. Exceptionally accurate and precise measurements published in the literature are evaluated based on their performance in specified concentration ranges. The strengths and weaknesses of the most accurate measurements are briefly explored. Chronopotentiometry (CP) and square wave voltammetry (SWV) are accurate and precise with low concentration measurements. …

High Expression Of Glycolytic Genes In Clinical Glioblastoma Patients Correlates With Lower Survival, Kimberly M. Stanke, Carrick Wilson, Srivatsan Kidambi

Department of Chemical and Biomolecular Engineering: Faculty Publications

Glioblastoma (GBM), the most aggressive brain tumor, is associated with a median survival at diagnosis of 16–20 months and limited treatment options. The key hallmark of GBM is altered tumor metabolism and marked increase in the rate of glycolysis. Aerobic glycolysis along with elevated glucose consumption and lactate production supports rapid cell proliferation and GBM growth. In this study, we examined the gene expression profile of metabolic targets in GBM samples from patients with lower grade glioma (LGG) and GBM. We found that gene expression of glycolytic enzymes is up-regulated in GBM samples and significantly associated with an elevated risk …

Personalized Nutrition As A Key Contributor To Improving Radiation Response In Breast Cancer, Anuradha A. Shastri, Joseph Lombardo, Samantha C Okere, Stephanie Higgins, Brittany C Smith, Tiziana Deangelis, Ajay Palagani, Kamryn Hines, Daniel A. Monti, Stella Volpe, Edith P. Mitchell, Nicole L Simone

Department of Radiation Oncology Faculty Papers

Understanding metabolic and immune regulation inherent to patient populations is key to improving the radiation response for our patients. To date, radiation therapy regimens are prescribed based on tumor type and stage. Patient populations who are noted to have a poor response to radiation such as those of African American descent, those who have obesity or metabolic syndrome, or senior adult oncology patients, should be considered for concurrent therapies with radiation that will improve response. Here, we explore these populations of breast cancer patients, who frequently display radiation resistance and increased mortality rates, and identify the molecular underpinnings that are, …

An Experimental Test Of The Impact Of Varying Questionnaire Response Format On Prevalence Rates For Sexual Violence Victimization And Perpetration, Raeann E. Anderson, Kelly Cuccolo

Psychology Faculty Publications

Objective: This study examined the impact of a dichotomous versus scaled response format on prevalence rates of sexual violence perpetration and victimization, thus conceptually replicating Hamby et al., 2006 and extending those findings to the context of sexual violence.

Methods: Two samples were recruited from Amazon Mechanical Turk and were randomly assigned to either a dichotomous or scaled response format of the same questionnaire. Sample 1 was used to examine perpetration and received a perpetration specific version of the Post-Refusal Sexual Persistence Scale (PRSPS). Sample 2 was used to examine victimization and received a victimization specific version of the PRSPS. …

Spontaneous Visual Perspective-Taking: Level 2 Representations Of Another's Perspective Are Not Related To What They Actually See, Louis Aldrich

The Plymouth Student Scientist

The ability to understand what another person can see is a fundamental feature of human interaction, commonly referred to as ‘visual perspective-taking’ (VPT). Traditionally, this ability has been conceptualised along two ‘levels’, in line with developmental observations (Flavell, Everett, Croft & Flavell, 1981). ‘Level-1 VPT’ is a simple, automatic, and rapid process enabling understanding of what another individual can see. In contrast, ‘Level-2 VPT’ is a more complex process requiring conscious control, which enables understanding of how features of the environment look from another’s location. This has led to a widely accepted hypothesis that Level-1 VPT is necessary in the …

Who Owns These Objects? - Impact Of Social And Personal Conditions On Self-Prioritisation, Sammy Parkin

The Plymouth Student Scientist

A relatively new development concerning literature pertaining to the concept of self-bias has highlighted that humans tend to self-prioritise when completing tasks based on perceptual judgements (the self-prioritisation effect). Since then, further exploration into the role that other tasks can have on this effect have been demonstrated, including the idea that object-ownership tasks show the same effects (Golubickis et al., 2018). As recent focus has been on the association between this effect and the task used, it means that there has been little exploration into the possible role that other variables have on predicting levels of self-prioritisation. Based on this, …

Using Remote Sensing Techniques To Investigate The Detection Of Sargassum Blooms In The Caribbean And Possible Causes For These Events, Louise Ely

The Plymouth Student Scientist

Sargassum was thought to originate from a single source, the Sargasso Sea in the central west Atlantic. This has been challenged over the past decade after excessive amounts of the macroalgae began washing up on Caribbean coastlines in June 2011, leading the scientific community to investigate causes of this phenomenon. These, now yearly, events are having detrimental environmental and socioeconomic impacts in areas of the Caribbean and central America, providing motivation for uncovering any regime shifts or severe changes in anthropogenic activity. Anthropogenic sources of nitrate from three rivers surrounding the CWA in addition to wind stress and chlorophyll-a levels …

Handedness: Does It Affect Interhemispheric Transfer?, Diyotima Datta

The Plymouth Student Scientist

Left- handed people have different patterns of cerebral dominance to the rest of the population, as explained by Annett’s (1996) right shift theory. Left handers are considered to have bilateral functionality unlike right handers who have left cerebral dominance, which is believed to lead to faster interhemispheric transmission time in left- handers. The current research examined the effect of handedness on interhemispheric transfer time. The study was conducted online using fifty-one left and fifty-one right handers classified by laterality quotients obtained from Oldfield’s (1971) 12 item Edinburgh Handedness Inventory. The crossed uncrossed difference was calculated using mean reaction times yielded …

Spatial Variation In Epibiont Communities On The Shells Of Patella Vulgata Along An Estuarine Gradient, Edward Wilson

The Plymouth Student Scientist

In space limited intertidal habitats, non-specific substratum generalists can be observed to increase their survival and settlement opportunities by growing upon other living organisms. To date, few studies have assessed the influence of multiple environmental factors in determining patterns of epibiont diversity and community structure upon gastropod shells, across spatial scales. This study investigated the significance of surface salinity range, wave exposure and shell metrics in determining the composition and diversity of epibionts found upon shells of Patella vulgata (Common Limpet), throughout the Plymouth Sound and lower reaches of the Tamar Estuary, United Kingdom (UK). A total of 292 shells …

The Extent To Which Autistic Traits Are Predictive Of Impairments In Allocentric Spatial Navigation, Amber Presley

The Plymouth Student Scientist

This research is centred around how individuals with autistic traits navigate using both allocentric and egocentric spatial reference frames. Previous research suggests differences in the way that those with Autistic Spectrum Disorder (ASD) navigate with much research indicating that those with ASD struggle particularly with allocentric navigation. In this study, 256 participants completed a place learning task followed by two self-report questionnaires, the Navigation Inventory and the Autism Spectrum Quotient (AQ). Results showed that AQ scores correlated with better performance in the allocentric condition of the place learning task, this was in the opposite direction than predicted. Further to this, …

The Dark Tetrad Of Personality And The Tendency To Engage In Revenge Porn, Niamh Thomason-Darch

The Plymouth Student Scientist

Revenge porn is an increasing and pervasive phenomenon. Despite this, the knowledge and understanding of this behaviour is limited, especially the psychological characteristics of perpetrators of revenge porn. The Dark Tetrad of personality: Machiavellianism, psychopathy, narcissism, and sadism, has been associated with a range of antisocial behaviours. Recent research indicates a relationship between the Dark Tetrad and revenge porn proclivity. The present study extended these findings by investigating the relationship between revenge porn proclivity and the Dark Tetrad using more trait-specific measures. A community sample of 306 participants, aged 18-77, were recruited online. Participants completed a series of personality measures …

Public Perceptions Of Indecent Image Offenders, Joshua Samuel Taylor-Smith

The Plymouth Student Scientist

Indecent images of children (IIOC) offences are on the rise year by year, in part due to the easy accessibility to this content with the augmentation of the internet. This has led to increased attention from the public and those involved with law enforcement. However, research into the public perceptions of these offences is very limited. While they do not directly dictate law enforcement, the views of the public have become dominant in penal policymaking and therefore, understanding their current perceptions and beliefs is paramount. One of the only items of research into this area was conducted by Lam et …

How Do Personality Traits Influence The Experience Of Positive Emotions?, Elenie Shotton

The Plymouth Student Scientist

Neuroticism is a personality trait known to be associated with negative emotions (Tellegan, 1985), but little is known about how it affects the experience of positive emotions, and more specifically, hope. Positive emotions can have long lasting effects on well-being, by broadening thought-action repertoires and undoing lingering negative emotions (Frederickson, 1998). Cognitive strategies strongly influence state positive emotions in individuals low in neuroticism, but have no effect on those with high neuroticism (Ng & Diener, 2009). We expected individuals high in neuroticism would experience a smaller increase in state hope following hope emotion induction. Participants completed an online survey involving …

An Isotropic Neo-Hookean Finite Element Model Of Healthy Elastic Arterial Walls Within Commercial Software, Reece Ambrose

The Plymouth Student Scientist

A non-linear isotropic finite element model of an elastic arterial wall is developed within the ANSYS commercial software package. While progressively increasing complexity of the model, it is validated with analytical theory. Geometric nonlinearity is investigated and an iterative convergence method for the calculation of a solution-dependent axial force, which increases with artery deformation, is presented. Neo-Hookean hyperelastic material models are fitted to existing uniaxial, biaxial, and shear experimental data from literature for both rubber and polyurethane elastomer to introduce material nonlinearity into the arterial wall model. A mesh independence study was performed to determine a suitable mesh and the …

Scale Model Behaviour And Float Geometry Influence On An Oscillating Water Column System, Daniel Cresswell

The Plymouth Student Scientist

A numerical model based on a 1:60 scale Lazy-S Mooring Line has been developed using the dynamic analysis software OrcaFlex, to determine the software’s capabilities when analysing discretized scale models, and to quantify the effect that varying float surface geometry has on mooring line system damping. Static analysis was performed, followed by dynamic analysis, based on experimental data from physical testing in the University of Plymouth 35m Sediment Flume tank, against two distinct float shapes with equivalent hydrostatic properties but aspect ratio variance perpendicular to fluid flow. The impact of scale modelling on static line forces, effective tension and driving …

How Are Defendants Of High-Profile Court Cases Framed In The Media? A Qualitative Analysis Of News Media Coverage Of Caroline Flack's Arrest, Lucy Matthews

The Plymouth Student Scientist

This present study aims to investigate whether news media coverage on Caroline Flack’s arrest, in December 2019, showed characteristics of ‘Trial by Media’ (TBM) through identification of one-sided, unbalanced or predominantly negative, sensationalised or speculative news coverage. Caroline Flack’s case has importance due to her ‘media trial’ potentially contributing to her mental health issues, and subsequent suicide two months after her arrest. This study also aims to assess how much this media coverage could have contributed to this. Forty news media articles were analysed from the 18-day period, starting from her arrest, using Media Framing Analysis (MFA; Giles & Shaw, …

Impact Of Geographical Variability On The Bleaching Stresses In The Atlantic, Indian And South Pacific Ocean, Niamh Bowdler

The Plymouth Student Scientist

This dissertation examines the relationship between the geographical location and the degree of coral bleaching. Corals within different ocean regions are subjected to fluctuations in temperature causing variations in thermal thresholds which affects how the reef fauna adapts to the changing environment. Quadrats were obtained from XL Catlin Global Reef Record and analysed to determine the state of the coral at three locations: East Bermuda (Atlantic Ocean), Egmont (Indian Ocean) and Agincourt (South Pacific Ocean). The mean monthly and weekly sea surface temperature (SST) data was extracted from Giovanni between 2002-2020 for all three reefs. ANOVA: single factor tests (analysis …

A Comparison Of The Risk Of Pancreatic Adenocarcinoma Development Between Individuals With Different Abo Blood Group Phenotypes: A Meta-Analysis, Danielle Martin

The Plymouth Student Scientist

A comparison of the risk of pancreatic adenocarcinoma development between individuals with different ABO blood group phenotypes: A meta-analysis

What Effect Do Government Policies Have On The Transmission Of Covid-19?, Emily Prestige

The Plymouth Student Scientist

This investigation aimed to determine the effect of government policies on the transmission of COVID-19 during the period 30/01/2020 – 03/01/2021. This investigation used qualitative data from policy legislation and journals and quantitative data from official government pandemic figures. It also used central factors of successful government approaches to assess the efficacy of the UK Government strategy. The measure used to monitor transmission rates is the instantaneous reproduction number Rt. I have used summary statistics, data visualisation, and time series representations to conduct exploratory data analyses. I also investigated the change in testing capacity and positivity rate over time to …

Exploring The Minimum Number Of Trials Needed To Accurately Detect Concealed Information Using Eeg, Rhian Graham

The Plymouth Student Scientist

Deception can have serious consequences, therefore detection methods such as the Electroencephalogram (EEG) are vital. However, they can be perceived as time-consuming thus causing limited usage. The purpose of this study was to discover the minimum number of trials needed to accurately detect deception. It was hypothesised that accuracy would increase with number of trials (due to reduced effects of noise) but would then fall (due to subject’s fatigue). Due to the Coronavirus, this study was restricted to 9 participants within our ‘Lab Bubble’ of third-year Psychology students at the University of Plymouth. A Concealed Information Test (CIT) was conducted, …

Intercomparison Of Salinity Products In The Beaufort Gyre And Arctic Ocean, Sarah B. Hall, Bulusu Subrahmanyam, James H. Morison

Faculty Publications

Salinity is the primary determinant of the Arctic Ocean’s density structure. Freshwater accumulation and distribution in the Arctic Ocean have varied significantly in recent decades and certainly in the Beaufort Gyre (BG). In this study, we analyze salinity variations in the BG region between 2012 and 2017. We use in situ salinity observations from the Seasonal Ice Zone Reconnaissance Surveys (SIZRS), CTD casts from the Beaufort Gyre Exploration Project (BGP), and the EN4 data to validate and compare with satellite observations from Soil Moisture Active Passive (SMAP), Soil Moisture and Ocean Salinity (SMOS), and Aquarius Optimally Interpolated Sea Surface Salinity …

Workplace Democracy Practices And Librarians’ Commitment In Universities In Southwest Nigeria, Yemisi T. Babalola Prof, Oluwaseun O. Fagbemiro, Opeyemi D. Soyemi Dr

Library Philosophy and Practice (e-journal)

The effort of committed personnel is needed for the workplace to function optimally and to achieve the goals of the organization. This study examined the influence of workplace democracy practices on librarians’ commitment in universities in Southwest, Nigeria. A survey research design was adopted for the study. The population consisted of 477 librarians in Southwest, Nigeria. Proportionate stratified sampling technique was used to select 217 librarians who served as respondents in the study. A researcher’s developed instrument was used for data collection and collected data were subjected to analysis using descriptive and inferential statistics. Findings revealed that the extent of …

Negative Order Kdv Equation With No Solitary Traveling Waves, Miguel Rodriguez, Jing Li, Zhijun Qiao

School of Mathematical & Statistical Sciences Faculty Publications

We consider the negative order KdV (NKdV) hierarchy which generates nonlinear integrable equations. Selecting different seed functions produces different evolution equations. We apply the traveling wave setting to study one of these equations. Assuming a particular type of solution leads us to solve a cubic equation. New solutions are found, but none of these are classical solitary traveling wave solutions.

Phenotypic Evaluation And Genetic Analysis Of Seedling Emergence In A Global Collection Of Wheat Genotypes (Triticum Aestivum L.) Under Limited Water Availability, Michael G. Francki, Grantley Stainer, Esther Walker, Gregory J. Rebetzke, Katia T. Stefanova, Robert J. French

Grain and Other Field Crops Research Articles

The challenge in establishing an early-sown wheat crop in southern Australia is the need for consistently high seedling emergence when sowing deep in subsoil moisture ( > 10 cm) or into dry top-soil (4 cm). However, the latter is strongly reliant on a minimum soil water availability to ensure successful seedling emergence. This study aimed to: (1) evaluate 233 Australian and selected international wheat genotypes for consistently high seedling emergence under limited soil water availability when sown in 4 cm of top-soil in field and glasshouse (GH) studies; (2) ascertain genetic loci associated with phenotypic variation using a genome-wide association study …

Treatment-Specific Hippocampal Subfield Volume Changes With Antidepressant Medication Or Cognitive-Behavior Therapy In Treatment-Naive Depression., Hua-Hsin Tai, Jungho Cha, Faezeh Vedaei, Boadie W Dunlop, W Edward Craighead, Helen S Mayberg, Ki Sueng Choi

Department of Neuroscience Faculty Papers

Background: Hippocampal atrophy has been consistently reported in major depressive disorder with more recent focus on subfields. However, literature on hippocampal volume changes after antidepressant treatment has been limited. The first-line treatments for depression include antidepressant medication (ADM) or cognitive-behavior therapy (CBT). To understand the differential effects of CBT and ADM on the hippocampus, we investigated the volume alterations of hippocampal subfields with treatment, outcome, and chronicity in treatment-naïve depression patients. Methods: Treatment-naïve depressed patients from the PReDICT study were included in this analysis. A total of 172 patients who completed 12 weeks of randomized treatment with CBT (n …

Analysis Of Some Farm Driving Variables And Its Relation With Milk Production In A Pastoral Dairy Farm Of Buenos Aires, Argentina, J. L. Rossi, A. Ayala Torales, G. Acosta, V. A. Deregibus

IGC Proceedings (1977-2023)

The quantity of milk solids produced determines a dairy farm income and contributes to its profit. Total pasture production, forage quality and herd consumption are factors to be managed in this production system. The outcomes of two years were analyzed. Primary production showed its dependence on climatic conditions and use of technological inputs. Forage quality was promoted through interseeding legumes, applying fertilizer and maintaining the pasture young and leafy. Total forage removed by the herd was similar in both years although pasture production decreased. It was possible to cope with seasonal variations in forage production, by varying the grazing pressure …

Feminist Attitudes, Behaviors, And Culture Shaping Women’S Center Practice, Angela Clark-Taylor, Emily Creamer, Barbara Lesavoy, Catherine Cerulli Dr.

The Seneca Falls Dialogues Journal

The present article contributes to the growing research on women’s centers to extend and encourage the role of feminism in women’s center within higher education. We provide a brief history of feminism and women’s centers in higher education to illuminate the connections between previous research and our women’s center research on community perceptions of feminisms.

Influencing Public Opinion: Activist Public Relations And The Arrest Of Susan B. Anthony, Arien Rozelle

The Seneca Falls Dialogues Journal

The Suffrage movement stands out as an early progressive cause that utilized an integrated approach to public relations in support of a clear objective. The arrest of Susan B. Anthony provided the movement with a huge opportunity to influence public opinion in order to win the right to vote.

#Themtoo: Two Nfl Team Options For Not Exploiting Women Cheerleaders, Melanie Kelly, Colby A. Murphy, Mary E. Graham

The Seneca Falls Dialogues Journal

This paper presents the results of an exploratory study of why and how professional football teams in the National Football League (NFL) use cheerleaders, the vast majority of whom are women. From archival press reports, media guides, and team website content, we examine why some teams choose not to use cheerleaders; and among the majority of teams that do use cheerleaders, the purposes for which they employ them. Based upon the findings, we categorize teams into two groups: (a) NFL teams that do not use cheerleaders but that also fail to capitalize on this potential competitive advantage; and (b) NFL …