bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of Transformerless Single Stage Double Switch Step Down PLL Derived Inverter using Single Phase Grid Connected PV Module with MPP Tracking
Authors: Vijayaprabhu A , Bhaskar K B , Rajavelu M , jehan N 
Published: August 2021

AbstractHere we propose a single stage double switch (SSDS) converter for single phase grid connected photo voltaic inverter step-down module, the structure is designed and modelled to a highly reliable step-down buck DC-DC converter and robust from the input derived from the PV module. The proposed PV module uses perturb and observe algorithm reference voltage to gain the maximum power in different changing climatic conditions. The grid is designed for 110 V/50 Hz, since it’s a low frequency, the utilization of heavy and expensive transformer is avoided, In a grid connected systems usually transformer is employed in the power conversion stage to provide sudden isolation between the PV system and the grid, and also ensures that no continuous current is injected into the grid by avoiding leakage currents between the PV module and the ground. As a choice to the grid connected module with line transformer, a transformer less inverter topology is discussed, to avoid the leakage currents possibly occurring due to the capacitance between the PV array and ground, an inverter topology with PLL is proposed to avoid common mode voltage and the increase in electromagnetic emissions. This paper provides a highly efficient transformer less photovoltaic grid topology with reduced switches and has been validated by simulation.
Machine Learning Methods for Marine Systems
Authors: Thangalakshmi Dr S , Sivasami Dr K 
Published: August 2021

Abstract
Automation plays a key role in shipping industry and aims towards minimal operating staff. However, the effective automation relies on effective controlling at various levels starting from shipbuilding to navigation. The industry is currently focussing on autonomous shipping which actually requires precise controlling. Although many conventional methods are available for control and automation with regard to automation, Artificial Intelligence Schemes (AIS) are widely attracting the maritime sector because of their benefits. The AIS along with fuzzy logic systems are offering promising results. The emerging use of AIS in a variety of maritime applications can act as a reference wpoint for new researchers. This paper aims to conduct a valid AIS study and to examine the various machine learning approaches used in various maritime applications. It is possible to achieve complete automation in the shipping industry by implementing a related technique.
Review and Comparison of Various Types of Generation Using WECS Topologies
Authors: Vijayaprabhu A , Bhaskar K B , Jasmine susila D , Dinesh M 
Published: August 2021

AbstractIncreasing in the power demand for day to day life, apart from fossil fuels wind energy conversion system (WECS) contributes largely, small wind turbines (SWT) and off shore installations become popular and with the continual research newly designed efficient generators and power converter design new wind turbine models are expected to launch in the recent years. At present WECS operates at fixed speed and variable speed drives using induction generator principle, such that Squirrel cage induction generators (SCIG) and Doubly fed induction generators have a geared operation, Permanent magnet synchronous generator (PMSG) goes gearless. In elaborate the comparisons, advantages and drawbacks of various WECS is discussed in this work.
Fenton-like catalytic oxidation of o-cresol wastewater by H2O2 over Fe2O3/AC catalysts
Authors: Liu Junyi , Xie Hao , Hu Xuetao 
Published: August 2021

Abstract
A series of high specific surface Fe2O3/AC catalysts for the Fenton-like catalytic oxidation of o-cresol wastewater was designed. The catalytic performance due to the characteristics of high specific surface area, large pore volume, high chemical stability and dispersive activity center. Under the suitable reaction conditions, the Fe2O3/AC with 3 wt.% Fe2O3 loading catalyst can run efficiently and continuously for 500 h without being deactivated, meanwhile the removal efficiency of COD can still be maintained above 59%, even the activity of the catalyst can remain above 79%. As a result, this kind of high specific surface Fe2O3/AC catalysts used in the heterogeneous Fenton-like catalytic oxidation of o-cresol wastewater has a great potential for industrial application.
Nano-CaCO3 synthesis by tangential jet from carbide slag
Authors: Mao Shuaidong , Yan Liu , Ting-An Zhang 
Published: August 2021

Abstract
The nano calcium carbonate with a smaller particle size is prepared by carbide slag in the improved tangential jet-reactor, and is characterized by means of SEM, XRD, and the specifics surface area. The results show that the particle agglomeration is mainly positively related to the calcium hydroxide saturation and liquid flow rate. And the particle size is correlated with liquid flow rate and carbon dioxide flow rate and concentration. And the sample obtained in the improved tangential jet-reactor has a smaller particle size than the bottom jet-reactor under the same conditions. Moreover, the specific area of calcium carbonate prepared under the optimal condition has increased from 8.3065 m2 g−1 to 11.3829 m2 g−1, and the particle size reduces from 266 nm to 199 nm by 27%.
A-3 Cingulo-Opercular and Frontoparietal Control Network Connectivity and Executive Functioning in Older Adults
Authors: Hausman Hanna K , Hardcastle Cheshire , Albizu Alejandro , Kraft Jessica N , Evangelista Nicole D , Boutzoukas Emanuel M , Langer Kailey G , O'Shea Andrew , Van Etten Emily , Bharadwaj Pradyumna K , Song Hyun , Smith Samantha G , Porges Eric S , DeKosky Steven , Hishaw Georg A , Wu Samuel , Marsiske Michael , Cohen Ronald A , Alexander Gene E , Woods Adam J 
Published: August 2021

Abstract

Objective
Executive functioning is a cognitive domain that typically declines with normal aging. Age-related disrupted connectivity in cingulo-opercular (CON) and frontoparietal control (FPCN) resting-state networks is associated with worse performance across various executive functioning tasks. This study examines the relationships between CON and FPCN connectivity and executive functioning performance in older adults across three subdomains: working memory, inhibition, and set-shifting.

Methods
274 healthy older adults (age M = 71.7, SD = 5.1; 87% Caucasian) from a clinical trial at the University of Florida and University of Arizona completed tasks of working memory (Digit Span Backwards [DSB]; Letter Number Sequencing [LNS]), inhibition (Stroop), and set-shifting (Trail Making Test Part B [TMT-B]). Participants underwent resting-state functional magnetic resonance imaging. CONN Toolbox (18b) was used for extracting average within-network connectivity of CON and FPCN. Multiple linear regressions were conducted with average network connectivity predicting performance, controlling for age, sex, education, and scanner.

Results
Greater average CON connectivity was associated with better performance on DSB (β = 0.26, p &lt; 0.001), LNS (β = 0.23, p &lt; 0.001), Stroop (β = 0.24, p &lt; 0.001), and TMT-B (β = −0.26, p &lt; 0.001). Greater average FPCN connectivity was associated with better performance on DSB (β = 0.22, p &lt; 0.001) and LNS (β = 0.18, p = 0.002).

Conclusions
CON connectivity was significantly associated with working memory, inhibition, and set-shifting. FPCN connectivity was significantly associated with working memory. Future research should conduct regional connectivity analyses within these networks to identify intervention targets to improve executive functioning in older adults.
A-7 Improving Brain-Behavior Health in Pediatric Survivors of ECMO
Authors: Holder Christen , Shappley Rebekah , Karmarkar Swati , Poplos Constance , Sandhu Hitesh , Shah Samir 
Published: August 2021

Abstract

Objective
Extracorporeal Membrane Oxygenation (ECMO) is a lifesaving measure associated with developmental delays and disabilities among survivors. While guidelines recommend follow-up care for ECMO survivors, children miss care due to the lack of standardized follow-up programs and formalized medical homes. We identified deficiencies in follow-up and developed a novel, structured program at a tertiary care children’s hospital called Standardizing Therapies after ECMO program (STEp) for ECMO survivors.

Methods
An IRB approved program, STEp was implemented in 2017. If consented, a STEp physician formally evaluated the patient’s post ECMO needs, ordered necessary consults, provided parental education and a letter to pediatrician describing patient’s likely long term medical needs and entered patient in a structured post-discharge follow-up program. We conducted a retrospective chart review to collect data prior to and after implementation of the program in 2017.

Results
There were 33 survivors in the pre-STEp period (2011–16) and 46 survivors in the STEp period (2017–2020). Consent was provided for STEp in 40 patients (87%). The referral rate improved in all necessary specialties (audiology, PT/OT, Neurology). Neuropsychology evaluation referrals improved from 42% to 58% and the timely evaluation improved from 50% to 100%. 35% of the patients evaluated by neuropsychology in the STEp period were diagnosed with a neurodevelopmental/neurocognitive disorder and thus received appropriate therapies.

Conclusions
Implementation of a standardized follow-up program for ECMO is feasible and can be implemented successfully. STEp demonstrates that with a structured post-ECMO follow-up program, ECMO survivors can receive appropriate neuropsychological evaluations consistently, thereby identifying potential problems and treatment options.
A-83 Neuropsychological Outcomes in Two COVID-19 Patients
Authors: Ostroy Elena , Campbell Irma 
Published: August 2021

Abstract

Objective
The cases describe neuropsychological functioning in a 55-year-old male and 37-year-old female with a history of COVID-19 illness. While COVID-19-related cognitive and psychological impairments are documented, long-term outcomes are not well understood as few case studies exist. The present case studies add to the growing body of literature describing the neuropsychological profile and outcomes in patients with a history of COVID-19 illness at 3 to 12 months post-illness.

Method
Both patients had confirmed COVID-19 illness with symptoms including fever, headache, ageusia, anosmia, and fatigue. An MRI/DTI/MRS of the brain showed significant changes for both patients. Self-reported cognitive symptoms at the initial evaluation (3 to 6 months post-illness) included problems with memory and attention for both patients. Symptoms of anxiety, depression, and irritability were reported.

Results
On the initial assessment, both patients showed decline in learning and memory. One patient showed additional decline in attention, executive functions, and processing speed. Symptoms of depression and anxiety were elevated in both patients. Following the initial evaluation, one patient participated in formal cognitive remediation. At the five to ten month follow-up, both patients reported improvements in cognition and psychological functioning. Neurocognitive testing showed improvements across most cognitive domains though residual deficits were noted for one patient in memory and executive functions. Emotionally, symptoms of anxiety and depression remained elevated.

Conclusions
Results add to the growing body of literature on the course of cognitive decline following COVID-19 illness. While significant cognitive recovery occurs within several months, residual cognitive and emotional problems can remain measurable up to a year post-illness.
A-85 Differences in Cerebral Blood Perfusion with Individuals Diagnosed with Cluster B Personality Disorders
Authors: Sydow D'anna , Amen Daniel , Willeumier Kristen , Arias Brittny , Golden Charles J , McDonald Bailey , Peart Zachary , Spagna Samantha 
Published: August 2021

Abstract

Objective
To identify regional cerebral blood flow (rCBF) differences between individuals with DSM-IV diagnosis of Cluster B Personality Disorders (PDB) and healthy controls.

Method
Healthy controls (n = 81, Mage = 41.9, 53.0% female, 42.0% Caucasian) and persons diagnosed by psychiatric examination with PDB (n=, Mage = 34.12, 71.5% female, 69.8% Caucasian) were selected from a deidentified adult clinical outpatient database. Those with comorbid diagnoses were included. Significant differences (alpha = 0.005) were found for age [t(195) = −3.62], gender [χ2(2) = 7.1], and race [χ2(12) = 23.82] between groups. Mean age [t(523) = 2.09, p = 0.037) and gender [t(532) = −2.653, p = 0.008] different significantly between groups. No significant mean difference was found for education [t(523) = 0.832, p = 0.406].

Results
Significant rCBF differences were noted in the cerebellum [left:F(1,192) = 10.5; right:F(1,192) = 4.6], limbic system [left:F(1,192) = 7.8; right:F(1,192) = 5.0], and basal ganglia [left:F(1,192) = 12.3; right:F(1,192) = 6.7]. Group means comparisons indicated higher perfusion in the cerebellum for the PDB group. Lower perfusion was found in the limbic system and basal ganglia in the PDB group.

Conclusion
Results observed in this study are concurrent with previous literature. PDB demonstrates higher activity in the cerebellum which contains inhibitory neurotransmitters, like Purkinje cells. The increased blood flow to cerebellar circuits may be related to the explicit self-recognition of negative emotion reported in PDB. Hypoperfusion found in the limbic system could be linked to impaired emotional responses. Apathy experienced in PDB may be accounted for by the low perfusion in the highly dopaminergic pathway in the basal ganglia. Further research should assess how different comorbidities with PDB affect perfusion.
A-90 Personality Tests in Neuropsychological Assessment: Determining the Presence of Psychotic and Obsessive Compulsive Disorders in 3 Individuals with Autism Spectrum Disorder
Authors: Torsney Kathleen 
Published: August 2021

Abstract

Objective
The assessment of personality and psychopathology in an individual who has symptoms of autism spectrum disorder (ASD) can be a challenging task due to the overlap of characteristic behaviors associated with ASD and markers of psychopathology. Through the examination of key factors in 3 case studies of neuropsychological assessments, this poster outlines steps to facilitate the correct diagnosis of psychiatric disorders in persons with autism spectrum disorder.

Method
This poster explores 3 case studies in which an individual exhibited signs of a psychiatric disorder as well as ASD. The author describes how the personality tests such as the MMPI-2 and MMPI-RF were administered and interpreted and how case history and test taking behavior affected the understanding of the results.

Results
The poster highlights critical factors in differentiating psychiatric disorders and symptoms that are part of the ASD. For example, in all 3 case studies, the individuals had significant difficulty with the computerized version of the test and needed to take it with paper and pencil. The author also outlines examples where the symptoms are manifestations of the ASD, such as perseveration and rigid thinking and when they are attributable to an obsessive–compulsive disorder. Further, the author differentiates signs of psychosis in a person with ASD from the typical tangential and circumstantial speech associated with ASD.

Conclusion
The author offers suggestions for administering personality tests to persons with ASD, for interpreting the results of the tests, and for conducting future research to facilitate the differentiation between symptoms consistent with ASD and with psychopathology.
A-98 Public Misconceptions about Concussion Are Not Improved by Standard Post-Injury Advice
Authors: Sullivan Karen , Kinmond Sally , Jaganathan Kannan Singaravelu 
Published: August 2021

Abstract

Objective
Insufficient public knowledge of concussion is thought to contribute to poor injury recognition and management, particularly in community sports. It is not clear whether such knowledge can be improved by standard post-injury discharge advice. This study determined if a widely used concussion leaflet would improve concussion knowledge in a community sample of adults.

Method
Prospective, controlled study, with random allocation to advice conditions. One hundred and ninety-nine Australian adults received either concussion (CA, n = 101) or non-concussion advice (NCA, n = 98). All volunteers completed the Rosenbaum Concussion Knowledge and Attitudes Survey (RoCKAS) on three occasions (baseline, immediately post-advice, and after a one-week delay). Standard scores were derived, including for the 25-item Concussion Knowledge Index.

Results
A 2 (condition) X 3 (occasion) mixed ANOVA did not find a statistically significant interaction or any main effects on concussion knowledge (p &lt; 0.05). On all three occasions, both groups obtained a RoCKAS total score of ~80% correct; but they also held some key misconceptions about concussion.

Conclusions
Compared to giving non-concussion information, public knowledge of concussion was not significantly improved by the concussion advice. The leaflet may not have conveyed the information needed to improve test scores, or the baseline performance of the groups could have suppressed the effect. Since correct injury recognition and management relies on community knowledge, alternate means of improving public knowledge of concussion should be explored. Concussion advisories should also be reviewed to ensure they can correct public misconceptions about concussion.
A-104 Examining Methods of Executive Ability from Trail Making Test Part B in Retired Football Players
Authors: Lopez-Hernandez Daniel W , Nordberg Bethany A , Bueno Alexis , Litvin Pavel Y , Bichlmeier Amy , Smith Kristina E , Olmos Winter , Sidhu Jasman , Saravia Sarah , Mangassarian Selina , Fatoorechi Sarah , Hardy David , Woo Ellen , Schmitter-Edgecombe Maureen , Cantu Robert C , Guskiewicz Kevin M , Kelly Daniel F , Swerdloff Ronald , Wright Matthew J 
Published: August 2021

Abstract

Introduction
Repeated sports-related concussions have been associated with cognitive deficits, similar to other forms of traumatic brain injury. We investigated three different measures of executive ability derived from the Trail Making Test part B (TMT-B) in healthy comparison (HC) adults and retired football players.

Methods
The sample consisted of 32 HC, 15 retired football speed players (FSP; e.g., quarterbacks), and 53 retired football non-speed players (FNP) participants. Participants were administered both TMT part A (TMT-A) and TMT-B, and total time for completion was recorded. A series of ANCOVAs, controlling for age and education were conducted to evaluate group differences in executive abilities. Executive measures included the TMT-B raw score (i.e., seconds to complete TMT-B), the raw score difference (in seconds) between TMT-A and TMT-B (TMT-BA), and the difference between a predicted TMT-B score (TMT-BP) and the obtained TMT-B score (TMT-BBP). Correlations between TMT-B, TMT-BA, and TMT-BBP and other executive functioning tests (i.e., letter fluency and animal naming) were evaluated.

Results
Results revealed that the HC group outperformed both retired football player groups on all measures of executive ability derived from TMT-B, p’s &lt; 0.05, ηps2 = 0.18–0.45. Furthermore, the retired FNP TMT-B and TMT-BA were significantly correlated with both letter fluency and animal naming, r’s = −0.40 to −0.36, p’s &lt; 0.05.

Discussion
We found that the HC group outperformed both retired football player groups on all three TMT variables. In our retired FNP sample, more TMT variables correlated with executive functioning measures which suggests that TMT-B and TMT-BA are likely better measures of executive ability than TMT-BBP.
A-107 Quantifying the Effect of Sleepiness and Mood on Gross Neuropsychological Functioning in a Forensic Population with a History of Traumatic Brain Injury
Authors: Brown Sarka T , Gorgens Kimberly , Lehto Marybeth , Meyer Laura , Signoracci Gina 
Published: August 2021

Abstract

Objective
Traumatic brain injury (TBI) is a serious public health concern. Furthermore, inmates and probationers are at a higher risk for TBI, as well as mental health issues and sleepiness. Both sleep and mood disturbance have been linked to poor cognitive performance. These state-dependent cognitive changes can undermine the evaluation of true cognitive ability and contaminate validity. This study examined the effects of sleep and mood on neurocognitive functioning and its impact on the validity of assessment results.

Methods
This study looked at retrospective Automated Neuropsychological Assessment Metrics (ANAM) core battery data. The sample included inmates and probationers (n = 419) with a history of TBI. A multiple linear regression was used to examine the relationship between self-reported sleepiness, mood state, and cognitive performance.

Results
All regression models were statistically significant, with negative mood being the most significant predictor of ANAM throughput scores (p = 0.000). Higher endorsement of negative mood states was related to lower cognitive performance overall (p = 0.003). Sleepiness predicted worse performance on at the end of the battery (p &lt; 0.05), whereas positive mood predicted better performance at the beginning of the battery (p &lt; 0.01).

Conslusion
The present study confirms that negative mood adversely affects global neurocognitive test performance in a forensic population. Examiners should be aware that sleepiness and mood states have an effect on test performance during even brief cognitive batteries. The current findings suggest that it is imperative to screen and identify sleepiness and negative mood symptoms as they may depress test results and threaten the validity or test interpretations and recommendations.
A-110 Post-Traumatic Growth in Relation to Quality of Life in Individuals with Moderate/Severe Traumatic Brain Injury
Authors: Fedio Alison A , Dekarchuk Marina , Roper Carrie , Sexton James , Dinklocker Brandy , Campbell Kylie , Khandker Sadiya , Powdrill Karen , Priluck Jacob , Cummings Sharon , Fedio Paul 
Published: August 2021

Abstract

Objective
Post-traumatic growth (PTG) is known to benefit individuals in recovery from traumatic brain injury (TBI) as they process and reframe personal losses. The purpose of this study was to assess the relationship of PTG with different domains of quality of life (QOL) in individuals following TBI.

Method
Fifteen adults (8 M, 7 F; mean age 31; 4 yrs post moderate/severe TBI) composed a personal statement for 3 minutes. Raters identified references to TBI and PTG in patients’ writing samples. Patients completed the Neurobehavioral Functioning Inventory (NFI) to assess physical, cognitive, and emotional/behavioral functioning, as well as the QOL Inventory to assess importance of, and satisfaction with, various domains of personal functioning. Results of independent samples t-tests (p &lt; 0.05 and/or Cohen’s d &gt; 0.80) are reported.

Results
Patients scored in the average range on the NFI. Seven of the 15 patients opted to address PTG, and the same seven individuals also wrote about their TBI. Those who addressed these topics reported higher educational level and longer loss of consciousness following TBI. Demonstrating large effect sizes, results revealed individuals endorsing PTG had higher QOL in domains involving productivity and agency (work, helping, play, creativity), whereas those not endorsing PTG had higher QOL in social domains (children, neighbors, community). Total QOL and other domains (e.g., health, money, love) did not differ between groups.

Conclusions
Results suggest that benefits of accepting and growing as a result of one’s brain injury include active self-development and contributions to society. Neurorehabilitation should encourage productivity as a means of enhancing PTG.