bluuebunny/crossref_metadata_2025_split huggingface dataset:
Power quality enhancement in asymmetrical cascaded multilevel inverter using modified carrier level shifted pulse width modulation approach
Authors: Vijayakumar Arun , Stonier Albert Alexander , Peter Geno , Loganathan Ashok Kumar , Ganji Vivekananda 
Published: November 2022

AbstractNew modified carrier‐based level shifted pulse width modulation approaches for single‐phase trinary dc source fed cascaded H‐bridge inverters are proposed in this article. In order to suppress the lower order harmonics, the carrier frequency is often tuned higher. However, switching and electromagnetic interference (EMI) problems have a significant influence on the functioning and controlling of the inverter at higher carrier frequency ranges. A new carrier is designed to address the aforementioned issues. To prove the effectiveness of the proposed carrier, this paper provides comparison results of conventional triangular carrier and a new developed carrier. Furthermore, utilizing the most popular phase disposition (PD) level shifted pulse width modulation approach with a new carrier with the similar modulation indices and switching frequency, to improve the fundamental voltage magnitude and shift the dominant harmonics into three times that of the existing traditional carrier‐based level shifted pulse width modulation approaches. The effectiveness and feasibility of the proposed new modified carrier‐based level shifted pulse width modulation approach have been proven by using MATLAB simulation and prototype results.
Forecast‐aided power and flexibility trading of prosumers in peer to peer markets
Authors: Yazdani Hassan , Doostizadeh Meysam , Aminifar Farrokh 
Published: November 2022

AbstractThe ever‐evolving electricity distribution network calls for new effective, transparent and fair market procedures to be implemented. This paper offers a systematic framework for real‐time trading in prosumer communities. A data‐driven robust optimization model that deals with uncertainty is proposed using the flexibility requirement envelope concept. Using machine learning techniques, high quality point and quantile forecasts are prepared to form the envelope. Next, this data is fed into the optimization problem to match the peers and the distribution grid, trading power, and flexibility in a short‐term look‐ahead horizon. To increase the quality of forecasts, a clustering approach accompanied by a pattern recognition machine is proposed to determine the cluster to which the recently observed net‐load data belongs. To provide forecasts, a forecasting machine is developed using a hybrid of tree‐based ensemble learning models, which provides intuitive, robust, and accurate results. Finally, the peer matching is done in a decentralized fashion using the alternating direction method of multipliers (ADMM), while each agent calculates its battery storage aging cost. Case studies demonstrate the hybrid model's capability in providing high quality power and flexibility forecasts compared to single models and ARIMA models and its positive impact on reducing the overall cost of the system.
Association of Swede Score and 2011 IFCPC Nomenclature in Women with Abnormal Cytology
Authors: Campos Priscila Loyola , Guimarães Isabel Cristina Chulvis do Val , Fialho Susana Cristina Aidé Viviani , Martins Caroline Alves Oliveira , Rodrigues Fabiana Resende , Velarde Luiz Guilhermo Coca , Monteiro Daniela da Silva Alves 
Published: November 2022

Abstract
Objective To assess the association between two colposcopic indices, the Swede score and the 2011 International Federation of Cervical Pathology and Colposcopy (IFCPC) Nomenclature as well as to determine the efficacy of the Swede score with cutoffs of 7 and 8.
Methods In the present cross-sectional pilot study, 34 women who had at least 1 colposcopy-directed biopsy due to abnormal cytology were enrolled. The colposcopic findings were scored by both the Swede score and the 2011 IFCPC Nomenclature and were compared with each other. The Kappa coefficient and the McNemar test were used. Accuracy, sensitivity, specificity, and positive and negative predictive values (NPV and PPV, respectively) were calculated, as well as the effectiveness with cutoffs of 7 and 8 in identifying cervical intraepithelial neoplasm (CIN) 2+ when using the Swede score.
Results The correlation between the 2 colposcopic indices was 79.41%. The Kappa coefficient and the McNemar p-value were 0.55 and 0.37, respectively. The IFCPC Nomenclature had sensitivity, specificity, accuracy, PPV, and NPV of 85.71, 55.00, 67.64, 57.14, and 84.61%, respectively. The Swede score had sensitivity, specificity, accuracy, PPV, and NPV of 100, 63.15, 79.41, 68.18, and 100%, respectively. A Swede score cutoff of 7 for CIN 2+ detection had a specificity of 94.73%, while with a cutoff of 8 it increased to 100%. The sensitivity for both values was 60%. The PPV and NPV for cutoffs of 7 and 8 were 90 and 75 and 100 and 76%, respectively.
Conclusion Although both colposcopic indices have good reproducibility, the Swede score showed greater accuracy, sensitivity, and specificity in identifying CIN 2 + , especially when using a cutoff of 8.
The Effectiveness of Herbal Medicines on Cyclic Mastalgia: A Systematic Review on Meta-analysis
Authors: Mirzaee Firoozeh , Fakari Farzaneh Rashidi , Babakhanian Masoudeh , Roozbeh Nasibeh , Ghazanfarpour Masumeh 
Published: November 2022

Abstract
Objective Different drugs are used to treat mastalgia, such as danazol and bromocriptine, and both are associated with side effects, due to which most of women and healthcare providers are interested in herbal medicines. Therefore we aim to study the effectiveness of phytoestrogens on the severity of cyclic mastalgia.
Methods To carry out the present study, English electronic resources such as the Cochrane Library, ISI Web of Science, Scopus, and PubMed were used systematically and with no time limitation up to February 10, 2020.
Results In total, 20 studies were included in the present meta-analysis. The results of the meta-analysis showed that herbal medicines versus the control group (standard mean difference [SMD] = - 0.585; 95% confidence interval [CI]: - 0.728–- 0.44; heterogeneity; p = 0.02; I2 = 42%), herbal medicines versus the B group (SMD = - 0.59; 95%CI: - 0.75–- 0.44; heterogeneity; p = 0.03; I2 = 42%), and its subgroups, such as phytoestrogen (SMD = - 0.691; 95%CI: - 0.82–- 0.55; heterogeneity; p = 0.669; I2 = 0%), Vitex-agnus-castus (SMD = - 0.642; 95%CI: - 0.84–- 0.44; p < 0.001; p = 203; I2 = 32%), flaxseed (SMD = - 0.63; 95%CI: - 0.901–- 0.367; p = 0.871; I2 = 0%), and evening primrose (SMD= - 0.485; 95%CI:- 0.84–- 0.12; p = 0.008; heterogeneity; p = 0.06; I2 = 56%] may have effective and helpful effects on improving cyclic breast mastalgia. Also, chamomile, isoflavone, cinnamon, and nigella sativa significantly reduced mastalgia symptoms.
Conclusion Herbal medicines and their subgroups may have effective and helpful effects on improving cyclic breast mastalgia. The findings of our meta-analysis must be done cautiously because low methodological quality in some evaluated studies of this systematic review.
Inflammatory Bowel Disease and Pregnancy: Is It a Marker for Adverse Outcomes?
Authors: Costa Rita Vicente , Simões Carolina , Correia Luís , Pinto Luísa 
Published: November 2022

Abstract
Objective To assess obstetric/puerperal/neonatal outcomes in an inflammatory bowel disease (IBD) population and to analyze disease characteristics that may be associated to adverse outcomes.
Methods Retrospective descriptive analysis including 47 pregnant women with IBD (28 with Crohn's disease – CD and 19 with ulcerative colitis – UC) who delivered between March 2012 and July 2018 in a tertiary hospital. We reviewed clinical records to extract demographic information, previous medical history, disease subtype, activity, severity, treatment, and obstetric, puerperal, and neonatal outcome measures.
Results Obstetric and neonatal complications (composite outcomes) occurred in 55.3% and 14.6% of the IBD population, respectively, and were more frequent in UC patients. Preterm birth (PTB), preeclampsia, anemia, low birth weight (LBW), and neonatal death were also more frequent in UC patients. The rate of postpartum hemorrhage (PPH) was 14.9%, and it was higher in CD patients. Women with active IBD had more obstetric/neonatal adverse outcomes (fetal growth restriction and LBW in particular) and cesarean sections. Patients with medicated IBD had less obstetric/neonatal complications (PTB and LBW in specific) and cesarean sections but more PPH.
Conclusion Women with IBD may have an increased risk of obstetric/puerperal/neonatal adverse outcomes. Ulcerative colitis patients had more obstetric and neonatal complications, whereas PPH was more frequent if CD patients. Other disease characteristics were considered, which allowed a better understanding of their possible influence. Although more research is needed, this work reinforces the importance of adequate surveillance to allow prompt recognition and treatment of complications.
Minimally Invasive and Robotic Surgery for Ulcerative Colitis
Authors: Lee Grace C. , Bhama Anuradha R. 
Published: November 2022

AbstractSignificant advancements have been made over the last 30 years in the use of minimally invasive techniques for curative and restorative operations in patients with ulcerative colitis (UC). Numerous studies have demonstrated the safety and feasibility of laparoscopic and robotic approaches to subtotal colectomy (including in the urgent setting), total proctocolectomy, completion proctectomy, and pelvic pouch creation. Data show equivalent or improved short-term postoperative outcomes with minimally invasive techniques compared to open surgery, and equivalent or improved long-term bowel function, sexual function, and fertility. Overall, while minimally invasive techniques are safe and feasible for properly selected UC patients, surgeons must remember to abide by the principles of high-quality proctectomy and pouch creation and convert to open if necessary.
Fission properties of neutron-rich nuclei around the end point of $r$-process
Authors: Chen Jiawei , Pei Junchen , Qiang Yu , Chi Jihuai 
Published: November 2022

Abstract
We studied the fission properties of neutron-rich nuclei $^{278, 286}$Cf around the end point of $r$-process by microscopic self-consistent approaches. The fission barriers and potential energy surfaces are obtained by constrained static Skyrme Hartree-Fock-BCS calculations. Fission fragments are studied by dynamical time-dependent Hartree-Fock+BCS calculations. Results show that $^{286}$Cf has an octupole deformation at ground state, which can increase the fission barrier height by 1.1 MeV and enhance significantly the spontaneous fission half-life. To search possible fission channels, dynamical calculations with a broad coverage of initial deformations result in two slightly asymmetric peaks around $A$=128 and 150 for $^{278}$Cf, and $A$=133 and 153 for $^{286}$Cf. The very asymmetric fission channel as given by semi-empirical models are not found in our results.
High harmonic generation near a bow-tie nanostructure: sensitivity to carrier envelope phase and plasmonic inhomogeneity
Authors: Mandal Ankur , Singh Kamal P 
Published: November 2022

Abstract
High harmonic generation (HHG) from atoms near a plasmonic nanostructure interacting with a relatively low intensity driving laser field is a promising candidate for table top attosecond pulse source. The effect of carrier envelope phase (CEP) of the few cycle driving pulse on inhomogeneous high harmonics generation is well studied in literature, for example, the harmonic cut-off can be efficiently controlled by tuning the CEP. Here, we show selective enhancements of harmonic spectra due to half-cycle cutoff (HCO) which is highly sensitive to the CEP, in both spatially homogeneous and inhomogeneous driving laser fields. Essentially the selective enhancement of spectral structures results from contributions of both short and long trajectories in certain HCO regions. Compared to the homogeneous HHG in the presence of inhomogeneity, these enhanced groups eventually merge to the background with the increase of the strength of inhomogeneity. This limits the maximum possible tunability of selective enhancement. Further, near cut-off harmonics can be a good candidate to produce isolated attosecond pulses, with substantial control via CEP of the driving laser pulse along with the strength of inhomogeneity.
Ground fault location research based on multidimensional scaling and density clustering algorithm
Authors: He Feng , Hu Xuran , Zhang Decai 
Published: November 2022

Abstract
When a single line-to-ground fault occurs in a current distribution network containing distributed power sources, fault location is primarily performed by current-based directional protection. This implies using the switching information at the nodes; however, this does not sufficiently maximize the fault information. To address these issues, a single-phase grounding fault location methodology is planned for distribution networks supported by a combination of three-dimensional scaling (MDS) and density-based spatial clustering of applications with noise (DBSCAN). First, the network description matrix is made to support the network topology. Second, the zero-sequence and negative-sequence currents collected at the terminals square measure pre-processed to obtain two-dimensional fault data feature vectors. Third, the fault feature vectors square measure is subjected to DBSCAN bunch analysis to obtain the fault zones of the distribution network, thus compensating for the disadvantage that DBSCAN cannot efficiently replicate high-dimensional knowledge. The simulation results reveal that the planned methodology is not tormented by fault location, fault resistance, fault angle, or line sort; therefore, the fault location results in a correct square measure and might effectively utilize the fault data.
Synthesis and Electrochemical Performance of Layered Double Perovskite Anode for Direct Carbon Solid Oxide Fuel Cell
Authors: Ai Chengyi , Qiao Jinshuo 
Published: November 2022

Abstract
As an energy conversion device, Direct carbon solid oxide fuel cell (DC-SOFC) can efficiently convert the chemical energy contained in carbonaceous fuels into electricity. It may be an efficient and clean way to utilize carbon fuels. In this paper, (PrBa)0.95Fe1.7Ti0.2Co0.1O6-δ (PBFTC), a perovskite oxide with A-site ordered layered structure, is successfully prepared via a sol-gel method and it has been studied as the DC-SOFC anode material. Doping of Ti and the ordered layered structure make PBFTC achieve good structural stability. The phase structure of PBFTC remained unchanged after being treated in both H2 and carbon reducing atmosphere so that it can be applied in DC-SOFC anode. Using PBFTC as the anode material, a peak power density as high as 386 mW·cm−2 is achieved at 800 °C when using pure activated carbon as fuel.
Research on the Optimal Scheduling Strategy of Energy Storage Plants for Peak-shaving and Valley-filling
Authors: Han Hanxian , Luo Jinman , Zhao Shanlong , Wang Lina 
Published: November 2022

Abstract
With the trend of large-scale development of distributed photovoltaics, the problems of frequent start-up and shutdown of units and wind abandonment caused by grid-connected distributed photovoltaics are becoming more and more obvious. In this paper, a method for optimal dispatching of power system was proposed based on the energy storage power station as an independent source. The method takes the minimum net load variance of the power system and the system operating cost as the objective function to optimize the charging and discharging power and dispatching of the energy storage power station, and the effectiveness of the method was verified by experiments. The results show that the energy storage power station can effectively reduce the peak-to-valley difference of the load in the power system. The number of times of air abandonment and switching of charging and discharging and the number of start and stop of the unit is reduced, which effectively prolongs the service life of the unit. When the photovoltaic penetration rate in the power system is greater than or equal to 50%, the peak regulation effect of the energy storage power station is better and has better economic benefits.
Dynamic response of wind turbine blade surface material under water droplet high velocity impact
Authors: Zhou Wen-ping , Yang Mao-li 
Published: November 2022

Abstract
When a wind turbine blade exposure to some degree of rainfall, water droplets in the atmosphere impact the blade at high velocity will causes erosion damages of the leading edge. The damages have significant influence to the aerodynamic performance of the blade, and also the cost of power generation. In this paper, a high velocity impact dynamics model of water droplet impact on wind turbine blade is develops based on SPH-FEM coupling method, where SPH model is used to model the large deformation region of the fluid domain, and FEM method is used to model the small deformation region of the structure domain. Together with properties of gelcoat material on the blade surface, effects of varying impact velocities and angles on the impact response of the gelcoat material are analysed through numerical simulation. The results show that during a high velocity impact event of water droplet, the contact force history appears two peaks. Also contact forces and strains on the blade material decreases with decreasing droplet impact velocity and impact angle, the total contact duration of the droplet during the impact decreases with increasing droplet impact velocity and angle. The present study is expected to provide theoretical guidance for enhancing the erosive capacity of wind turbine blade gelcoat material.
Cherenkov-light imaging of induced positron distribution in liquid water after proton beam irradiation
Authors: Yamamoto Seiichi , Yamashita Tomohiro , Kobashi Yusuke , Hirano Yoshiyuki , Akagi Takashi , Yokokawa Hiromu , Kataoka Jun 
Published: November 2022

Abstract
Imaging of positrons induced by nuclear reactions with a proton beam is a possible method for observing the beam shape from outside the subject. However, such imaging of induced positrons has so far been conducted for solid materials. The induced positron distribution in liquid water has not been measured or reported. To clarify the distribution of induced positrons in liquid water, we conducted Cherenkov-light imaging after irradiation by protons to a water phantom. After irradiation by a 117-MeV proton beam to a phantom containing liquid water, Cherenkov-light imaging of the induced positrons was conducted using a cooled charge-coupled device (CCD) camera following the decay of the positrons. We also imaged the luminescence of water during irradiation by the proton beam to compare the distributions. We could measure the distribution of Cherenkov-light from the induced positrons in liquid water. Positron distributions kept their beam shapes in water but were different from that of the luminescence image; positron distribution was wider in the deep area of the beams in the lateral as well as depth direction. The distributions' shapes were only slightly changed with time. We conclude that Cherenkov-light imaging from the induced positrons after irradiation by a proton beam in water was possible, and we found that the induced positrons kept their beam shape in water with different shape from that of dose. These findings may provide new insights for imaging in particle therapy.
The impact of abiotic and biotic factors on growth, mortality and net tree C stock in mountain forest ecosystems in southwest China
Authors: Li Ting , Liu Yang , Wang Qi , Lai Changhong , Qiu Yuming , Tissue David T , Xiao Jiangtao , Li Xuhua , Peng Li 
Published: November 2022

Abstract
Mountain forest ecosystems play an important role in global carbon sequestration and may respond differently to variations in climate. The timely and accurate assessment of the factors (abiotic and biotic) that affect forest types will improve our understanding of the ecological mechanisms underlying forest carbon stock and dynamics. Here, we used linear mixed effect models to assess the impact of abiotic and biotic factors on the rate of net tree C accumulation, growth, and mortality, over nearly four decades in 1248 permanent forest plots, in different forest types along an elevational gradient on the eastern Qinghai-Tibet Plateau in China. We found that the annual rise in net tree C stock ranged from 0.13 to 0.23 Mg C ha−1 yr−1, as forest growth increased from 1979 to 2017. The highest rates of growth and mortality were in coniferous broad-leaved mixed forest (CBMF), followed by deciduous broad-leaved forests (BDF), evergreen, deciduous broad-leaved mixed forest (EDBMF), and coniferous forest (CF). Mortality increased in EDBMF and CF during the study period. The most important biotic factors were tree richness and tree density, especially in BDF and CBMF. The most important abiotic factors driving these biological responses were a significant rise in monthly mean temperature (MMT) and a decline in precipitation in the growing season. The decrease in precipitation was negatively correlated with net tree C in CBMF and CF. The increase of MMT was positively correlated with growth and mortality of each forest type, and generally more important than richness and density, and overall had a positive effect on net tree C in CBMF and CF. Overall, we suggest that tree carbon stocks will continue to increase in CBMF and CF in the coming decades due to the warming.
Micropyramid-patterned, oxygen-permeable bottomed dish for high density culture of pancreatic islets
Authors: Myrick Ryan J , Shang Kuang-Ming , Betts Jonathan F , Gonzalez Nelson , Rawson Jeffrey , Izumi Kenji , Koba Naoya , Tsuchiya Takanori , Kato Hiroyuki , Omori Keiko , Kandeel Fouad , Mullen Yoko , Tai Yu-Chong , Botvinick Elliot , Komatsu Hirotake 
Published: November 2022

Abstract
The need for maintaining cell-spheroid viability and function within high-density cultures is unmet for various clinical and experimental applications, including cell therapies. One immediate application is for transplantation of pancreatic islets, a clinically recognized treatment option to cure type 1 diabetes; islets are isolated from a donor for subsequent culture prior to transplantation. However, high seeding conditions cause unsolicited fusion of multiple spheroids, thereby limiting oxygen diffusion to induce hypoxic cell death. Here we introduce a culture dish incorporating a micropyramid-patterned surface to prevent the unsolicited fusion and oxygen-permeable bottom for optimal oxygen environment. A 400 µm-thick, oxygen-permeable polydimethylsiloxane sheet topped with micropyramid pattern of 400 µm-base and 200 µm-height was fabricated to apply to the 24-well plate format. The micropyramid pattern separated the individual pancreatic islets to prevent the fusion of multiple islets. This platform supported the high oxygen demand of islets at high seeding density at 260 islet equivalents cm−2, a 2–3-fold higher seeding density compared to the conventional islet culture used in a preparation for the clinical islet transplantations, demonstrating improved islet morphology, metabolism and function in a 4 d-culture. Transplantation of these islets into immunodeficient diabetic mice exhibited significantly improved engraftment to achieve euglycemia compared to islets cultured in the conventional culture wells. Collectively, this simple design modification allows for high-density cultures of three-dimensional cell spheroids to improve the viability and function for an array of investigational and clinical replacement tissues.