bluuebunny/crossref_metadata_2025_split huggingface dataset:
A novel sensorless current shaping control approach for SVPWM inverter with voltage disturbance rejection in a dc grid–based wind power generation system
Authors: Sahoo Buddhadeva , Routray Sangram Keshari , Rout Pravat Kumar 
Published: January 2020

AbstractA novel sensorless current shaping (CS) control strategy is proposed to avail better power quality (PQ) of a dc grid–based wind power generation system (WPGS) used on a poultry farm by generating an appropriate reference current for space vector pulse width modulation (SVPWM) inverter. The proposed CS strategy also offers adequate control for parallel operation of multiple generators and inverter applications, without requiring voltage and frequency synchronization. Further, to control the poultry farm–based WPGS, a two‐stage control loop is implemented such as energy flow control loop (EFCL) and harmonic control loop (HCL). The first loop is used to regulate the power flow, and the second loop is used to compensate harmonics. A mathematical current decomposition technique is suggested for an appropriate resistance emulation to realize a better power flow, higher harmonic rejection, and better inverter operation. In this planned approach for attaining constant wind speed, an electric ventilation fan in the poultry farm is used. A combined hybrid dc and ac grid approaches are suggested for facilitating variable load integration in a poultry farm–based microgrid system. Moreover, for achieving better power management during the islanded mode of operation, the battery energy storage (BES) device is integrated with the dc grid through a bidirectional converter. The proposed WPGS design and control approach has been simulated through MATLAB/Simulink software under various test conditions, to demonstrate the operational capability, to achieve better PQ, and to increase the flexibility and reliability in the microgrid operation.
Composition of iron oxides in Archean and Paleoproterozoic mafic-ultramafic hosted Ni-Cu-PGE deposits in northern Fennoscandia: application to mineral exploration
Authors: Moilanen M. , Hanski E. , Konnunaho J. , Törmänen T. , Yang S.-H. , Lahaye Y. , O’Brien H. , Illikainen J. 
Published: January 2020

AbstractUsing electron probe microanalyzer (EPMA) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), we analyzed major and trace element compositions of iron oxides from Ni-Cu-PGE sulfide deposits hosted by mafic-ultramafic rocks in northern Fennoscandia, mostly focusing on Finland. The main research targets were the Archean Ruossakero Ni-(Cu) deposit; Tulppio dunite and related Ni-PGE mineralization; Hietaharju, Vaara, and Tainiovaara Ni-(Cu-PGE) deposits; and Paleoproterozoic Lomalampi PGE-(Ni-Cu) deposit. In addition, some reference samples from the Pechenga (Russia), Jinchuan (China), and Kevitsa (Finland) Ni-Cu-PGE sulfide deposits, and a barren komatiite sequence in the Kovero area (Finland) were studied. Magnetite and Cr-magnetite show a wide range of trace element compositions as a result of the variation of silicate and sulfide melt compositions and their post-magmatic modification history. Most importantly, the Ni content in oxide shows a positive correlation with the Ni tenor of the sulfide phase in equilibrium with magnetite, regardless of whether the sulfide assemblage is magmatic or post-magmatic in origin. The massive sulfide samples contain an oxide phase varying in composition from Cr-magnetite to magnetite, indicating that Cr-magnetite can crystallize directly from sulfide liquid. The Mg concentration of magnetites in massive sulfide samples is lowest among the samples analyzed, and this can be regarded as a diagnostic feature of an oxide phase crystallized together with primitive Fe-rich MSS (monosulfide solid solution). Our results show that magnetite geochemistry, plotted in appropriate discrimination diagrams, together with petrographical observations could be used as an indicator of potential Ni-(Cu-PGE) mineralization.
Diagnosis and management of Sandifer syndrome in children with intractable neurological symptoms
Authors: Mindlina Irina 
Published: January 2020

AbstractSandifer syndrome is a rare complication of gastro-oesophageal reflux disease (GERD) when a patient presents with extraoesophageal symptoms, typically neurological. The aim of this study was to review the existing literature and describe a typical presentation and most appropriate investigations and management for the Sandifer syndrome. A comprehensive literature search was performed via PubMed, Cochrane Library and NHS Evidence databases. Twenty-seven cases and observational studies were identified. The literature demonstrates that presenting symptoms of Sandifer’s may include any combination of abnormal movements and/or positioning of head, neck, trunk and upper limbs, seizure-like episodes, ocular symptoms, irritability, developmental and growth delay and iron-deficiency anaemia. A 24-h oesophageal pH monitoring was positive in all the cases of Sandifer’s where it was performed, while upper GI endoscopy ± biopsy and barium swallow were diagnostic only in a subset of cases. Successful treatment of the underlying gastro-oesophageal pathology led to a complete or near-complete resolution of the neurological symptoms in all of the cases.Conclusion: It is evident from the literature that many patients with Sandifer syndrome were originally misdiagnosed with various neuropsychiatric diagnoses that led to unnecessary testing and ineffective medications with significant side effects. Earlier diagnosis of Sandifer’s would have allowed to avoid them.What is Known:• Sandifer syndrome is a rare complication of gastro-oesophageal reflux disease (GERD) when a patient presents with extraoesophageal symptoms, typically neurological.• It may be difficult to recognise due to its non-specific presentation and lack of gastrointestinal symptoms.What is New:• Based on the review of 44 clinical cases of suspected Sandifer syndrome, the clinical picture was clarified: the presenting symptoms of Sandifer’s may include any combination of abnormal movements and/or positioning of head, neck, trunk and upper limbs, seizure-like episodes, ocular symptoms, irritability, developmental and growth delay and iron-deficiency anaemia.• Successful treatment of the underlying gastro-oesophageal pathology led to a complete or near-complete resolution of the neurological symptoms in all of the reviewed cases.
Gas trap stability in the Zechstein Limestone from the Rudna Copper Mine (SW Poland)
Authors: Poszytek Anna , Rybak-Ostrowska Barbara , Łukaszewski Paweł , Włodarczyk Marcin 
Published: January 2020

AbstractA gas and crashed rock burst in 2009 in the Rudna Copper Mine was the motivation to re-investigate the dolomite succession of the first Permian cyclothem (Werra), which covers the ceiling section of the excavations. Gas traps were recognized by previous research; however, the stability of gas traps during mining operations has not been studied yet. Mitigation of future gas bursts requires a complex analysis of these gas traps, involving petrological, petrophysical and mechanical analysis of the reservoir dolomite facies. The results indicate the significant influence of dolomite texture, porosity and extent of late diagenetic dolomite cement on the reservoir and geomechanical properties, and the induced failure pattern of the dolomite facies. The mechanism of dolomite failure allowed for interpreting the degree of dolomite degassing during and after mining operations.
Autism spectrum disorder and attention-deficit/hyperactivity disorder in children with cerebral palsy: results from screening in a population-based group
Authors: Påhlman Magnus , Gillberg Christopher , Wentz Elisabet , Himmelmann Kate 
Published: January 2020

AbstractAutism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD) are more common in children with cerebral palsy (CP) than in the general population, but may still be underdiagnosed. This study aimed to estimate screen-positive ASD and ADHD in a population-based group of 264 school-aged children with CP born 1999–2006 from the CP register of western Sweden. Validated parent-completed questionnaires were used at a median age of 12 years 11 months (range 8–17 years). Three different scales were used to detect signs of ASD and ADHD, respectively. Response rate was 88% (232/264). In 19 children, all in the most disabled group, the screening procedure was not feasible due to too few questionnaire items completed, leaving 213 for analyses. One third (74/213) of the children screened positive for ASD and half of the children (106/213) for ADHD, which was about twice as often as ASD/ADHD diagnoses had been clinically identified. Children with intellectual disability, epilepsy and/or impaired speech ability more often screened positive for ASD as well as ADHD. Severe motor impairment was more frequently associated with screen-positive ASD, but not ADHD. Neither sex nor CP type was associated with screen-positive ASD/ADHD. In conclusion, school-aged children with CP very often screened positive for ASD and/or ADHD. The prevalence of ASD and ADHD is most likely underestimated in children with CP. These screening findings require further investigations.
Density Functional Theory Studies of Zn12O12 Clusters Doped with Mg/Eu and Defect Complexes
Authors: Aravindh S. Assa , Roqan Iman S. , Alawadhi Hussain 
Published: January 2020

AbstractWe report a density functional theory study of ZnO cluster doped with Eu and Mg along with native point defects using the generalized gradient approximation including the Hubbard parameter. The Zn atomic positions are found to be energetically more favorable doping sites than O. The Eu has a lower formation energy than Zn and O vacancies, helps in lowering the formation energy of point defects and induces spin polarization. Mg is less favorable dopant energetically and is not inducing any magnetism in the cluster. Presence of Eu and point defects along with Mg can help in sustaining spin polarization, implying that transition metal and rare earth dopant is a favorable combination to invoke desirable properties in ZnO based materials. Eu–Eu doping pair prefers ferromagnetic orientation and a spin flip is induced by Eu in the Eu–Mg configuration. Further, Eu doping increases the value of static refractive index and optical absorption in the UV region compared to the undoped ZnO cluster.
A game-theoretic optimisation approach to fair customer allocation in oligopolies
Authors: Charitopoulos Vassilis M. , Dua Vivek , Pinto Jose M. , Papageorgiou Lazaros G. 
Published: January 2020

AbstractUnder the ever-increasing capital intensive environment that contemporary process industries face, oligopolies begin to form in mature markets where a small number of companies regulate and serve the customer base. Strategic and operational decisions are highly dependent on the firms’ customer portfolio and conventional modelling approaches neglect the rational behaviour of the decision makers, with regards to the problem of customer allocation, by assuming either static competition or a leader-follower structure. In this article, we address the fair customer allocation within oligopolies by employing the Nash bargaining approach. The overall problem is formulated as mixed integer program with linear constraints and a nonlinear objective function which is further linearised following a separable programming approach. Case studies from the industrial liquid market highlight the importance and benefits of the proposed game theoretic approach.
Synthesis optimisation and characterisation of chitosan-calcite adsorbent from fishery-food waste for phosphorus removal
Authors: Pap Sabolc , Kirk Caroline , Bremner Barbara , Turk Sekulic Maja , Gibb Stuart W. , Maletic Snezana , Taggart Mark A. 
Published: January 2020

AbstractHere, Box-Behnken design (BBD) approaches were utilised to optimise synthesis methodology for the chitosan-calcite rich adsorbent (CCM) made from fishery-food waste material (crab carapace), using low-temperature activation and potassium hydroxide (KOH). The effect of activation temperature, activation time and impregnation ratio was studied. The final adsorbent material was evaluated for its phosphorus (P) removal efficiency from liquid phase. Results showed that impregnation ratio was the most significant individual factor as this acted to increase surface deacetylation of the chitin (to chitosan) and increased the number of amine groups (–NH2) in the chitosan chain. P removal efficiency approached 75.89% (at initial P concentration of 20 mg/L) under optimised experimental conditions, i.e. where the impregnation ratio for KOH:carapace (g/g) was 1:1, the activation temperature was 105 °C and the activation time was 150 min. Predicted responses were in good agreement with the experimental data. Additionally, the pristine and CCM material were further analysed using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), Brunauer-Emmett-Teller technique (BET), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA). Characterisation showed enhancements in surface chemistry (introducing positively charged amine groups), textural properties and thermal stability of the CCM.
A New Coryphoid Palm from the Maastrichtian-Danian Sediments of Madhya Pradesh and its Palaeoenvironmental Implications
Authors: Khan Mahasin Ali , Roy Kaustav , Hazra Taposhi , Mahato Sumana , Bera Subir 
Published: January 2020

Abstract
A new petrified palm stem Palmoxylon dindoriensis Khan, Roy et Bera, sp. nov. from the latest Maastrichtian (late Cretaceous)-earliest Danian (early Paleocene) sediments of the Deccan Intertrappean beds of Madhya Pradesh, central India is reported. Sections from different parts of the recovered stem were prepared by using standard thin section techniques and studied under transmitted light compound and scanning electron microscopes. The significant anatomical characters of the present fossil stem are the presence of well-preserved fibrovascular bundles (fvbs) with reniform type of dorsal fibrous sclerenchymatous part (dcap), two metaxylem vessel elements in each fvb, well-developed two-layered tabular parenchyma around dcap of fvb, fibrous bundles throughout the CZ, highly compact ground parenchyma tissue and the absence of centrifugal differentiation of fibrous part of fvb. The aforesaid anatomical attributes reveal its close resemblance with the extant taxa of subfamily Coryphoideae of the family Arecaceae having Cocos-type general stem organization. The core distribution of modern palms and the presence of highly compact ground parenchyma of the present fossil suggest that they thrived under a tropical, terrestrial warm, humid environment during the time of deposition (latest Maastrichtian-earliest Danian).
The role of alkali metal and alkaline metal earth in natural zeolite on combustion of Albizia Falcataria sawdust
Authors: Hairul Bahri Mokh. , Wijayanti Widya , Hamidi Nurkholis , Wardana I. N. G. 
Published: January 2020

AbstractThe combustion process of Albizia falcataria (AF) sawdust with the addition of natural zeolite (NZ) was observed experimentally using PT 1600 LINSEIS Simultaneous thermal analyzer (STA). The results showed that alkali metal and alkaline metal earth in NZ play an essential role in the process of decomposing the Hemicellulose AF molecule. The results of the molecular analysis show that the chemical balance of the mixture determines the combustion temperature. Excess NZ becomes a thermal burden which slows down the combustion reaction because heat does not sufficiently activate alkali metal and alkaline metal earth in NZ. In a small amount, NZ is less involved in the AF decomposition process. It shows that a mixture of AF and NZ can increase combustion kinetic in the right mix. Addition of 15–20% of NZ decreases the ignition temperature within faster burning rate. Activated alkali metal and alkaline metal earth decompose hemicellulose faster so that they burn completely in minimizing pollutant and maximizing LHV. Greater NZ completes the decomposition much earlier so that at the resting time of the process NZ slightly absorbs heat sinking LHV. The drastic reduction of Ca due to NZ make the fuel is suitable for boiler because Ca is responsible for agglomeration and corrosion.
Physical fitness in institutionalized older adults with dementia: association with cognition, functional capacity and quality of life
Authors: Sampaio A. , Marques-Aleixo I. , Seabra A. , Mota J. , Marques E. , Carvalho J. 
Published: January 2020

AbstractThis cross-sectional study investigated the association of physical fitness with cognitive function, functional capacity and quality of life among institutionalized older adults with dementia. One hundred and two older adults aged 78.0 ± 8.4 years, predominantly female (67.6%), with neurocognitive disorder due to Alzheimer’s disease (AD) (49.2%), vascular dementia (14.7%), Parkinson’s disease (2%), dementia with Lewy bodies (2%) or unspecified dementia (32.1%) participated in the present study. Regression analyses were used to examine associations between physical fitness components (Senior Fitness Test) and cognitive function (Mini-Mental State Examination), functional capacity (Katz Index of Independence in Activities of Daily Living) and Quality of Life (QoL)-Alzheimer's Disease scale. Univariate regression indicates that strength, flexibility, agility/dynamic balance and aerobic endurance are relevant for cognitive function, physical capacity and perceived QoL in institutionalized older people with dementia. After multiple regression analyses, adjusted for body mass index (BMI), results showed that aerobic endurance had a significant positive association with Total Katz Index. For both, caregiver perception of QoL-AD and global QoL-AD, BMI remained significantly and positively associated. Agility–dynamic balance presented a significant negative relation with global QoL-AD. Overall, our findings suggest that better physical fitness is important for cognition and autonomous functional capacity and that it has positive repercussions on the QoL in institutionalized older adults with dementia. Consequently, exercise-based therapeutic strategies aiming to improve physical fitness should be implemented.
The association between sociodemographic characteristics and dementia in patients with atrial fibrillation
Authors: Wändell Per , Carlsson Axel C. , Li Xinjun , Gasevic Danijela , Sundquist Jan , Sundquist Kristina 
Published: January 2020

Abstract
Objectives
Association between socio-demographic factors and dementia risk is studied in general but not for atrial fibrillation (AF) patients.

Methods
We studied AF patients ≥ 45 years in Sweden 1998–2012 (n = 537,513) using the Total Population Register for socio-demographic factors, the Swedish Cause of Death Register, and the National Patient Register (NPR) for incident dementia. Cox regression with hazard ratios (HR) and 95% confidence intervals (CI) was used for the association between exposure and outcome, adjusting for age and comorbidities.

Results
Totally 30,332 patients (5.6%) were diagnosed with dementia during the follow-up (mean 5.4 years). Of these, 14,097 were men (4.9%) and 16,235 were women (6.5%). Lower educational levels (reference: highest level) were associated with increased dementia, HRs (95% CI) for basic school for men 1.23 (1.18–1.29) and women 1.36 (1.30–1.42), and middle-level school for men 1.17 (1.11–1.22) and women 1.28 (1.22–1.34). Divorced men and women (reference: married) showed increased risk of dementia, HR 1.07 (1.01–1.13) and 1.12 (1.06–1.18), respectively, while widowed men showed lower risk, HR 0.84 (0.80–0.88). High deprivation neighborhood socio-economic status (NSES; reference: medium level) was associated with increased dementia in men, HR 1.11 (1.05–1.17), and low deprivation neighborhood socio-economic status (NSES) with increased dementia in men and women, HR 1.12 (1.06–1.18) and 1.18 (1.12–1.24), respectively.

Conclusions
Some results were expected, i.e. association between lower educational level and dementia. The higher risk of dementia in low deprivation NSES-areas could be due to a higher awareness about dementia, and subsequent earlier diagnosis and treatment of dementia.
Value at Induced Risk: Injection‐Induced Seismic Risk From Low‐Probability, High‐Impact Events
Authors: Langenbruch Cornelius , Ellsworth William L. , Woo Jeong‐Ung , Wald David J. 
Published: January 2020

AbstractThe increasing number of damaging earthquakes, induced by underground injection of fluids, demonstrates the need of a structured methodology for critical thinking about and clear communication of induced seismic risk. Using the Pohang, South Korea, geothermal project and the damaging (US$75M) local magnitudeML5.35 induced earthquake in 2017, we present a straightforward methodology that summarizes induced seismic risk in a single time‐dependent number, the Value at Induced Risk (VaIR). VaIR quantifies the amount of economic losses that will not be exceeded at a given confidence level. Our method reveals that the Pohang project was exposed to a 2% chance of causing economic losses of US$140M or more (1% of US$3.2B or more). The high risk could have been identified during the sequence of reservoir stimulation, lasting almost 2 years. VaIR opens new ways to assess and communicate risk to all stakeholders for informed risk management decision making.
How Tropical Convection Couples High Moist Static Energy Over Land and Ocean
Authors: Zhang Yi , Fueglistaler Stephan 
Published: January 2020

AbstractWe show that in the tropics, tropical atmospheric dynamics force the subcloud moist static energy (MSE) over land and ocean to be very similar in, and only in, regions of deep convection. Using observed rainfall as a proxy for convection and reanalysis data to calculate MSE, we show that subcloud MSE in the nonconvective regions may differ substantially between land and ocean but is uniform across latitudes in convective regions even on a daily timescale. This result holds also in CMIP5 model simulations of past cold and future warm climates. Furthermore, the distribution of rainfall amount in subcloud MSE is very similar over land and ocean with the peak at 343 J/g and a half width at half maximum of 3 J/g. Our results demonstrate that the horizontally uniform free tropospheric temperature forces the highest subcloud MSE values to be similar over land and ocean.
Dynamical Response of an Arctic Mixed‐Phase Cloud to Ice Precipitation and Downwelling Longwave Radiation From an Upper‐Level Cloud
Authors: Chen Yao‐Sheng , Harrington Jerry Y. , Verlinde Johannes , Zhang Fuqing , Oue Mariko 
Published: January 2020

AbstractMultilayered, mixed‐phase clouds are frequently present in the Arctic atmosphere. The upper‐level clouds can impact the lower‐level clouds through seeding with ice precipitation and reducing their cloud top radiative cooling rate. The Regional Atmospheric Modeling System is used to study the response of the lower‐level clouds to the perturbations introduced by the upper‐level clouds through the aforementioned mechanisms. The results show that both ice‐seeding and downwelling longwave radiation from the upper‐level clouds contribute to the dissipation of the lower‐level clouds. With the reduction of liquid in the lower‐level cloud, differential heating between the region directly perturbed by the upper‐level cloud and the adjacent region drives a circulation in and below the lower‐level cloud and dissipates the liquid in the lower‐level cloud beyond the directly perturbed region. The broad updraft formed in the perturbed region as the liquid layer in the low‐level cloud dissipates can lead to the re‐formation of a liquid cloud layer in the center of the gap if the perturbations weaken, the results of which is to reduce the magnitude of the differential heating and limit the significance of this response. However, even with this re‐formation, the warm air in the gap lowers the cloud top height and reduces the liquid water path of nearby clouds and potentially changes their radiative effects.