bluuebunny/crossref_metadata_2025_split huggingface dataset:
Impact of digital time delay on the stable grid‐hosting capacity of large‐scale centralised PV plant
Authors: Liu Jinhong , Molinas Marta 
Published: March 2021

AbstractDigital control system has been widely used for the inverters in PV plant. However, the effects of digital time delay of digital control system on grid‐connected PV plants have not been fully studied. Therefore, in view of the stable grid‐hosting capacity is a key parameter in the process of designing and operating of a grid‐connected PV plant, this paper investigates in detail the influence of digital time delay on the stable grid‐hosting capacity of large‐scale centralised PV plant. Considering the practical situation of large‐scale centralised PV plants, the stable grid‐hosting capacity of plant is discussed with the conditions of inverters in PV plant have the same and different digital time delays. The analysis results revealed that stable grid‐hosting capacity is varied with the digital time delay of inverter and the combination of the inverter with different digital time delays. Meanwhile, in order to realize a stable grid‐connected PV plant in particular delay case, a procedure on how to determine the exact inverter number that can be used in a specific PV plant is provided. The theoretical analysis is verified by simulation and equivalent experiment results.
Micro‐hydro generator fed frequency adaptive sliding mode controlled air conditioning system for remote and hilly areas
Authors: Kalla Ujjwal Kumar , Rathore Kuldeep Singh , Bhati Nikhil , Palwalia Dheeraj Kumar , Singh Bhim 
Published: March 2021

AbstractThis paper presents a micro‐hydro generator driven frequency adaptive sliding mode (FASM) control‐based improved power quality permanent magnet brushless DC motor (PMBLDCM) driven air conditioning system for remote and hilly areas. In such locations, the grid availability is poor or limited. The self‐excited asynchronous generator (SEAG) is highly suitable for micro‐hydro power generation. The voltage and frequency regulations of SEAG systems are very poor. Therefore, an improved power quality FASM control of a new zeta function based modified CSC (ZFM‐CSC) converter scheme is developed to drive the micro‐hydro power driven SEAG fed air conditioning system. The conventional air‐conditioning schemes are suitable for the grid fed system, where the frequency and voltage remain constant. However, these conventional control schemes are not suitable for a standalone SEAG based micro‐hydro generator driven air conditioners since the frequency and voltage of this system vary frequently at different loadings and dynamic operating conditions. This leads to an incorrect estimation of reference source current in a conventional system, which in turn affects the system stability. The sudden change of loads in a conventional air conditioning system may de‐magnetize and de‐stabilize the micro‐hydro driven SEAG. The experimental and simulated results presented validate the robustness of this system.
Multi‐objective optimization of photovoltaic/wind/biomass/battery‐based grid‐integrated hybrid renewable energy system
Authors: Pavankumar Yadala , Kollu Ravindra , Debnath Sudipta 
Published: March 2021

AbstractThe variable nature of the renewable energy resources (RES) complicates their modelling, operation, and integration to the grid. Therefore, it is difficult to choose optimal RES with a proper energy storage system (ESS) for the economic and reliable operation of the grid‐integrated hybrid renewable energy system (HRES). There is a need to solve this optimal HRES problem using efficient algorithms due to the high cost and model complexity involved. In this study, optimal photovoltaic, wind, biomass, and battery‐based grid‐integrated HRES is proposed using a multi‐objective artificial cooperative search algorithm (MOACS) to minimise annual life cycle costing and loss of power supply probability. ESS is chosen to provide a backup power supply for at least 30 min during peak load condition. A probabilistic approach is used to consider the time‐varying nature of the RES and load while solving optimal HRES design problem by employing MOACS. A comparative analysis is provided at the end, which shows that MOACS can provide a better optimal design of HRES.
A novel hybrid downsampling and optimized random forest approach for islanding detection and non‐islanding power quality events classification in distributed generation integrated system
Authors: Mishra Sairam , Mallick Ranjan Kumar , Gadanayak Debadatta Amaresh , Nayak Pravati 
Published: March 2021

AbstractThe quality of power in modern‐day power system is polluted with increased penetration of converter‐based distributed generations such as wind farm, solar PV system. In such scenarios detection of islanding and power quality disturbances as well as the removal of these from the system is quite crucial for equipment and maintenance personnel safety. Here, a down‐sampling empirical mode decomposition (DEMD) and optimized random forest (RF) machine learning approach are hybridized to detect islanding conditions with reduced non‐detection zone (NDZ) and classify non‐islanding power quality events in a highly wind energy penetrated distribution generation system. DEMD has a special ability to filter out the fundamental signal from the polluted signal and random forest is quite an unbiased non‐linear machine learning approach. Moreover, an improved grey wolf optimization technique is proposed to optimize the parameter of RF. The proposed technique is simulated in MATLAB/Simulink with IEEE 13‐Bus test grid. The efficacy of the proposed method is evaluated through comparative analysis with existing machine learning techniques under normal and noisy environments as well as validated in narrow NDZ with lesser detection time.
On networked Euler–Lagrangian systems consensus under switching topologies
Authors: Liu Kun , Sha Depeng , Sun Liang , Liu Peijie 
Published: March 2021

AbstractThis paper studies the consensus of multiple Euler–Lagrangian systems with dynamic uncertainties and the challenges to be solved lie on weak interaction, time‐varying interaction and parametric uncertainties. The overlapped problem makes the control protocol of the networked Euler–Lagrangian system hard to analyze and design and to resolve the issue, a novel reference, as well as an adaptive protocol, is proposed. In addition, the concept of integral‐ stability is employed. Under the control of the proposed protocol, networking coupled Euler–Lagrange systems achieve synchronization which means inter‐subsystems state errors converge to zero with a mild assumption of the union of switching topologies containing a directed spanning tree. The numerical simulations verify the effectiveness of the proposed protocol.
Fusion protocol for improving coverage and connectivity WSNs
Authors: Rajawat Anand Singh , Jain Sumit , Barhanpurkar Kanishk 
Published: March 2021

AbstractThe authors proposed a fusion protocol using multilevel clustering (FPMC), which is completely dependent on the increased coverage and wireless sensor network (WSN) reliability‐clustering framework to eliminate duplication. Therefore, a static sensor for a point of interest is allocated where possible so that the particular area can be protected. Furthermore, FPMC ensures that only one sensor node is allocated to cover a specific point of interest. The network coverage, energy usage, mean movement of WSNs nodes and sensor nodes are active in each loop due to which efficiency of the proposed protocol was assessed under various densities, and its performance was also analysed. Evaluations have shown that with restricted active nodes and sensor nodes, the FPMC can increase the networking coverage. The FPMC should be stressed as reducing the overlap level. The proposed protocol is based on the fusion protocol using multi‐level clustering for improving coverage and connectivity WSNs.
Ultra-magnifying narrow-band imaging for endoscopic diagnosis of gastric intestinal metaplasia: a pilot image analysis study
Authors: Iwagami Hiroyoshi , Uedo Noriya , Yip Hon-Chi , Shichijo Satoki , Kanesaka Takashi , Maekawa Akira , Yamamoto Sachiko , Higashino Koji , Takeuchi Yoji , Ishihara Ryu , Nakatsuka Shin-ichi 
Published: March 2021

Abstract
Background and study aims Narrow-band imaging (NBI) with or without magnification has recently been used for diagnosis of gastric intestinal metaplasia (GIM). Endocytoscopy is a newly developed endoscopic technique that enables ultra-high (500 ×) magnification of the digestive tract mucosa. This study aimed to analyze the ultra-magnifying NBI characteristics of GIM.
Patients and methods This was a retrospective observational study conducted in a cancer referral center. Patients who underwent ultra-magnifying NBI of the gastric mucosa using endocytoscopy were eligible. A soft black cap was used for non-contact observation. We compared the characteristic findings of GIM by ultra-magnifying NBI of metaplastic and non-metaplastic mucosae. A reference standard for GIM in this study was conventional magnifying NBI findings of GIM.
Results We obtained 28 images of metaplastic mucosa and 32 of non-metaplastic mucosa from 38 patients. Ultra-magnifying NBI revealed the cobblestone-like cellular structure in the marginal crypt epithelium of metaplastic and non-metaplastic mucosa. Diagnostic values (sensitivity, specificity, accuracy and kappa value [95 % confidence interval]) for the heterogeneous cellular structure and rough contour of the marginal crypt epithelium were 82 % (68 %–96 %), 94 % (85 %–100 %), 88 % (80 %–96 %), and 0.70, and 86 % (73 %–99 %), 94 % (85 %–100 %), 90 % (82 %–98 %), and 0.71, respectively.
Conclusions The characteristic ultrastructural features of GIM were identified by ultra-magnifying NBI, warranting validation of diagnostic value in a prospective study.
Association between Levels of Total Cell-Free DNA and Development of Preeclampsia—A Literature Review
Authors: Wu Yi , Werlang Ana , Cheng Weiwei , Lanes Andrea , Wen Shi Wu , Walker Mark 
Published: March 2021

AbstractObjectives The aim of the study is to synthesize the evidence and evaluate the total cell-free deoxyribonucleic (cfDNA) associated with the prediction of preeclampsia (PE). Total cfDNA is constituted by both cell-free fetal DNA (cffDNA) originated mainly from the placenta, and maternal cfDNA derived from maternal leukocytes.Methods A systematic review was conducted by searching PubMed and Medline. Literature reporting levels of total cfDNA in the development of PE was included. Studies that only reported cffDNA, but no cfDNA concentrations were not included in this review.Results Eight studies were included. Seven reported values of cfDNA in PE patients, regardless of early or late onset PE, six of which demonstrated a significant increase of cfDNA in patients who subsequently developed PE. Seven studies evaluated cfDNA levels in the first trimester, six of which showed significant increase of cfDNA concentrations in women who later developed PE. Five studies investigated cfDNA levels in the second trimester, all presenting increased total cfDNA levels in the PE group compared with normal controls.Conclusion Total cfDNA may play a role as a biochemical marker of PE, compared with fetal cfDNA. Large prospective studies with homogeneous populations and standardized methodology are needed to further confirm its predictive value.
Modified Glasgow Coma Scale and the Alert Verbal Painful Unresponsive Scale for Assessing the Level of Consciousness in Pediatric Critical Care Patients—A Comparative Study
Authors: Chaudhary Richa , Nagula Karthikeya , Taksande Amar 
Published: March 2021

AbstractAltered consciousness is a common problem encountered in the pediatric emergency department. Modified Glasgow coma scale (MGCS) has been widely used in pediatric intensive care units (PICUs) for assessing the level of consciousness in children with various illnesses. To compare utility of alert verbal painful unresponsive (AVPU) scale and MGCS for assessing level of consciousness of critically ill patients admitted to PICU. A prospective observational study was conducted at Acharya Vinoba Bhave Rural Hospital in Maharashtra, India on children above the age of 30 days admitted to the PICU from September 2018 to August 2019, fulfilling the inclusion criteria, after obtaining informed consent from the parents. Level of consciousness of the enrolled patients was assessed using the AVPU scale and MGCS. One-way analysis of variance technique was used for data analysis. A total of 74 children were included in the study. A good correlation was observed between the two scales and mean MGCS score of 13.8 (13–15), 11.3 (11–12), 8.09 (7–9), and 3 corresponded to A, V, P, and U, respectively. AVPU scale was comparable to MGCS in assessing level of consciousness in children admitted to PICU. AVPU can be used for initial evaluation of level of consciousness in children presenting with altered consciousness. More detailed MGCS can be used to assess the improvement over time and to decide further treatment strategy.
Novel Presentation of Pediatric Inflammatory Multisystem Syndrome Temporally Associated with COVID-19
Authors: Thomas Arun , Hiremath Sagar , Baju M.M. 
Published: March 2021

AbstractPediatric inflammatory multisystem syndrome temporally associated with coronavirus disease 2019 (COVID-19) is an emerging rare disease reported in children 4 to 6 weeks after a usually asymptomatic COVID-19 infection. Though it usually presents as a Kawasaki-like illness or toxic shock syndrome, other multisystem presentations have been reported. Presentation as hemiplegia, however, is rare. Here, we describe a child with acute hemiplegia and rapidly progressive shock, who responded dramatically to steroids and intravenous immunoglobulin and experienced a full recovery. By reporting this case, we wish to add to the literature this atypical presentation of this novel disease, and highlight the importance of quickly diagnosing and treating this life-threatening disease.
Cognitive Deficits in Pediatric Craniopharyngioma: An Updated Review
Authors: Al-Mirza Abdulrahman , Al-Taei Omar , Al-Saadi Tariq 
Published: March 2021

AbstractCraniopharyngiomas (CP) are brain tumors that often occur in children and adolescent that results in many neurological and endocrinological disorders. The aim of this systematic review is to provide updated version of studies used to formalize standard tests used for cognitive impairment in pediatric patients with craniopharyngioma. A systematic review was conducted in PubMed, EBSCO, ProQuest, Science Direct, Wiley Online, and Springer to identify studies assessing cognitive impairment in pediatric patients with craniopharyngioma. Academic and learning dysfunctions were reported in seven studies among 41 of 178 patients (23%). Visual–spatial deficits were reported in six studies. Speech and verbal dysfunctions were reported in three studies. Memory deficits were reported in eight studies among 61 of 197 patients (31%). Motor dysfunctions were reported in five studies. Sleep related issues were reported in four studies among 33 of 70 patients (47.1%). Patients with treated pediatric CP demonstrate a high incidence of neurological deficits including cognitive dysfunctions. Academic and learning dysfunctions, visual–spatial deficits, speech and verbal dysfunctions, memory deficits, and sleep-related issues were the most commonly reported cognitive deficits in the present study.
Laboratory Verification of a BRCA1 and BRCA2 Massively Parallel Sequencing Assay from Wet Bench to Bioinformatics for Germline DNA Analysis
Authors: Poon Kok-Siong , Chiu Lily , Tan Karen Mei-Ling 
Published: March 2021

Abstract
Introduction A robust genetic test for BRCA1 and BRCA2 genes is necessary for the diagnosis, prognosis, and treatment of patients with hereditary breast and ovarian cancer. We evaluated a commercial amplicon-based massively parallel sequencing (MPS) assay, BRCA MASTR Plus on the MiSeq platform, for germline BRCA genetic testing.
Methods This study was performed on 31 DNA from cell lines and proficiency testing samples to establish the accuracy of the assay. A reference cell line DNA, NA12878 was used to determine the reproducibility of the assay. Discordant MPS result was resolved orthogonally by the current gold-standard Sanger sequencing method.
Results The analytical accuracy, sensitivity, and specificity for variant detection were 93.55, 92.86, and 100.00%, respectively. Both sequencing depth and variant allele frequencies were highly reproducible by comparing the NA12878 DNA tested in three separate runs. The single discordant result, later confirmed by Sanger sequencing was due to the inability of the MASTR Reporter software to identify a 40-bp deletion in BRCA1.
Conclusion The BRCA MASTR Plus assay on the MiSeq platform is accurate and reproducible for germline BRCA genetic testing, making it suitable for use in a clinical diagnostic laboratory. However, Sanger sequencing may still serve as a confirmatory method to improve diagnostic capability of the MPS assay.
Towards digital society management and ‘capitalism 4.0’ in contemporary Russia
Authors: Popkova Elena , Bogoviz Aleksei V. , Sergi Bruno S. 
Published: March 2021

AbstractConceptualizing the complexities of the Russian political economy strikingly illustrates the challenging but essential role of the State in the new process of capitalist reforms initiated in the 1990s. A missing ingredient in this discourse has been considering the extraordinary impact technology has on society and how it affects the process. Accordingly, this paper focuses on the current development of culturally unique capitalist theory in Russia, together with the practical application of proven quantitative landmarks and policy implications for managing digital society’s development to optimize capitalism in Russia. The paper performs a quantitative analysis of the considerable influence that the digital society has on Russian capitalism and how the latter can be systemically optimized through the former’s development. This contribution’s originality lies in its consideration of the consequences of digital culture on the unique model of capitalism shaping contemporary Russia. Currently, Russia is implementing a particular and unique model of capitalism model where the digital society’s influence is limited and contradictory. We argue that the Russian model of capitalism could experience rapid development in the foreseeable future with effective digital society management.
Global urban subway development, construction material stocks, and embodied carbon emissions
Authors: Mao Ruichang , Bao Yi , Duan Huabo , Liu Gang 
Published: March 2021

AbstractUrban subway system, as an important type of urban transportation infrastructure, can provide mass mobility service and help address urban sustainability challenges such as traffic congestion and air pollution. The continuous construction of subways, however, causes large amounts of construction materials and embodied greenhouse gas (GHG) emissions. In this study, we characterized the patterns of subway development, construction material stocks, and embodied emissions covering all 219 cities in the world in which subways are found by July 2020. The global subway length reached 16,419 km in 2020, and the construction material stocks amounted to 2.5 gigatons, equaling to an embodied emission of 560 megatons. In particular, China’s subway system contributes to ~40% of the total global stocks, with a pattern of moderate and steady stocks growth before 2010 and a rapid expansion afterwards, implying the late-development advantages and infrastructure-based urbanization mode. Our results demonstrated that identifying the spatiotemporal characteristics of subway materials stocks development is imperative for benchmarking future resource demand, informing sustainable subway planning, prospecting urban mining and waste management opportunities and challenges, and mitigating the associated environmental impacts for global GHG emission reduction.
“I was the Woman, he was the Man”: dementia, recognition, recognisability and gendered subjectivity
Authors: Sandberg Linn J 
Published: March 2021

AbstractSubjectivity is a widely explored topic in dementia studies, in both the humanities and the social sciences. Persistent discourses of “a loss of self” in dementia have been challenged by scholars, who argue for the need for continued recognition of the person with dementia and that subjectivity in dementia may be sustained. So far, however, there is a lack of discussion about the significance of gender, and how being recognised as a subject overall is closely intertwined with being recognised as a gendered subject. This article explores how gender matters to the recognition of subjectivity in dementia. But it also explores how dementia as a position of cognitive otherness may impact upon and disrupt gender performativity. The discussion builds on narratives from an interview study on intimacy and sexual relationships among heterosexual couples living with Alzheimer’s disease, as well as the narrative of the Swedish autobiographical novel Minns du? [Do you remember?] (Beckman, 2019), in which the nonbinary transgender narrator Alice seeks to recollect the memories of their partner AnnaBelle, who is living with a memory-related illness. The article shows how reiterations of gender could be significant in sustaining subjectivity for a person with dementia. But it also shows how cultural tropes of persons with dementia as strange(rs), children or animals position them as unintelligible and thus as unrecognisable gendered subjects. The novel, in contrast, provides an alternative form of worldmaking in which intersubjective recognition is not dependent on either cognitive function or binary gender within a heterosexual matrix.
Why has the COVID-19 pandemic increased support for Universal Basic Income?
Authors: Nettle Daniel , Johnson Elliott , Johnson Matthew , Saxe Rebecca 
Published: March 2021

AbstractThe onset of the 2020 global COVID-19 pandemic led to a marked increase in positive discussion of Universal Basic Income (UBI) in political and media circles. However, we do not know whether there was a corresponding increase in support for the policy in the public at large, or why. Here, we present three studies carried out during 2020 in UK and US samples. In study 1 (n = 802, April 2020), people expressed much stronger support for a UBI policy for the times of the pandemic and its aftermath than for normal times. This was largely explained by the increased importance they attached, in the pandemic context, to a system that is simple and efficient to administer, and that reduces stress and anxiety in society. In study 2 (n = 400, May 2020), we pitted UBI against a conditional targeted social transfer system. Preferences for UBI were stronger for pandemic times than for normal times. This was partially explained by a number of perceived advantages, such as simplicity of administration and suitability for a changing world. In study 3 (n = 397, September 2020), we found that the headline results of studies 1 and 2 persisted six months after the onset of the pandemic, albeit with attenuated effect sizes. Our results illustrate how a changing social and economic situation can bring about markedly different policy preferences, through changes in citizens’ perceptions of what is currently important.