batterydata/paper-abstracts huggingface dataset:
This paper presents an Energy Management System (EMS) for hybrid systems (HS) composed by a combination of renewable sources with the support of different storage devices (battery and hydrogen system) that allow its operation without the necessity of grid connection (i.e. a stand-alone system). The importance of the proposed EMS lies in taking into account economic issues that affect to the decision of which device of the HS must operate in each moment. Linear programming was used to meet the objective of minimizing the net present value of the operation cost of the HS for its whole lifespan. The total operation costs depend largely on the reposition costs of its components. Instead of considering predefined reposition years for each component and calculate their net present cost from them (as is commonly considered in other works), in this work it was proposed to use lifetime degradation models - based on the well-known statement that the lifetime depends on the hours of operation and the power profiles that the components are subjected to- from which the repositions are made to check how they affect to the cost calculation and, consequently, to the EMS performance. The behavior of the proposed control is checked under a long term simulation, in MATLAB-Simulink environment, whose duration is the expected lifespan of the HS (25 years). A conventional state-machine EMS is used as a case study to validate and compare the results obtained. The results demonstrate that the proposed HS and EMS combination assures reliable electricity support for stand-alone applications subject to different techno-economic criteria (generation cost and sustenance of battery SOC and hydrogen levels), achieving to minimize the operation cost of the system and extend their lifespan.
Wind energy is one types of renewable energy and it does not cause pollution. Therefore, presently, there is the technological development of applying wind energy for the electricity generation. Wind energy is used to replace fossil energy such as oil and coal, causing environmental pollution. Moreover, Thailand has promoted the studies of wind energy application to generate electricity. Nowadays, there is number of small and medium wind turbines used for electricity generation for buildings, houses and small communities. Since Thailand is located in the tropical climate, the buildings, houses and industrial facilities prefer installing roof ventilators to vent hot air out of the roof. Therefore, the author proposed the roof ventilator system equipped with a small direct current electric generator. A 18-watt DC generator was installed in 24-inch roof ventilator and carry around rotation of the generator by gear to the rotation axis of roof ventilator. The results of the study were found that roof ventilator would begin to generate a voltage of 0.2 - 0.3 volt at wind speed of 0.5 meters per second. When the wind speed is higher than 2 meters per second, it would produce about 3.5 volts. However, when connecting the voltage produced by the generator to the DC Step-Up Converter, it was found the wind speed of 5 meters per second. DC generators can produce a voltage of 3 volts. With the DC Step-Up Converter, the voltage would increase to approximately 12 volts and can the current to 220mA, which is sufficient level to work with light-emitting diode lamp. In sum, the system of roof ventilator with a small DC generator could be applied to generate electricity for various households.
Alloying with Se has been recently found to be an effective way to improve the cycling performance because the reduced-Se formations can act as a buffer matrix against the volume change of electrode for IVA materials or anchors S in Li-S batteries during cycling. In this paper, SnSe nanoparticles were dispersed within a carbon fiber matrix with ball milling and electrospinning methods. The uniform nano-architecture with SnSe nanoparticles homogeneously confined in the carbon matrix, which is revealed by X-ray powder diffraction and scanning electron microscope, provides a stable buffer and good electrical conductor for the lithiation/delithiation process. Moreover, Se-based phase acts as an additional stabilizer to alleviate Sn agglomeration during cycling. Such dual-buffered SnSe/C composites thus deliver large reversible capacity of 840mAh/g with ultrastable cycling performance over 100 cycles and demonstrate good rate capacity.
Generative adversarial networks (GANs) can be trained to generate three-dimensional (3D) image data, which are useful for design optimization. However, this conventionally requires 3D training data, which are challenging to obtain. Two-dimensional (2D) imaging techniques tend to be faster, higher resolution, better at phase identification and more widely available. Here we introduce a GAN architecture, SliceGAN, that is able to synthesize high-fidelity 3D datasets using a single representative 2D image. This is especially relevant for the task of material microstructure generation, as a cross-sectional micrograph can contain sufficient information to statistically reconstruct 3D samples. Our architecture implements the concept of uniform information density, which ensures both that generated volumes are equally high quality at all points in space and that arbitrarily large volumes can be generated. SliceGAN has been successfully trained on a diverse set of materials, demonstrating the widespread applicability of this tool. The quality of generated micrographs is shown through a statistical comparison of synthetic and real datasets of a battery electrode in terms of key microstructural metrics. Finally, we find that the generation time for a 108 voxel volume is on the order of a few seconds, yielding a path for future studies into high-throughput microstructural optimization.
In this study, we investigated whether tanshinone I (T-I) has therapeutic effects in cellular and animal model of Parkinson’s disease (PD), and explore its possible mechanism. For this purpose, human neuroblastoma SH-SY5Y cells were cultured and exposed to 100 μM 6-hydroxydopamine (6-OHDA) in the absence or presence of T-I (1, 2.5 and 5 μM). The results revealed that 6-OHDA-induced cell death was reduced by T-I pretreatment as measured by MTT assay, lactate dehydrogenase release and flow cytomety analysis of cell apoptosis. The increase in the reactive oxygen species caused by 6-OHDA treatment was also attenuated by T-I in SH-SY5Y cells. T-I pretreatment was also shown to result in an increase in nuclear factor erythroid-2-related factor 2 (Nrf2) protein levels and its transcriptional activity as well as the upregulation of Nrf2-dependent genes encoding the antioxidant enzymes heme oxygenase-1, glutathione cysteine ligase regulatory subunit and glutathione cysteine ligase modulatory subunit in SH-SY5Y cells. Moreover, in the in vivo experiment, T-I treatment significantly attenuated 6-OHDA-induced striatal oxidative stress and ameliorated dopaminergic neurotoxicity in 6-OHDA-lesioned mice, as evidenced by western blot analysis of tyrosine hydroxylase (TH) and TH immunostaining of dopaminergic neurons in the substantia nigra and the striatum. Taken together, the results suggest that T-I may be beneficial for the treatment of neurodegenerative diseases like PD.
Behavioral variation in Broca’s aphasia has been characterized as boundless, calling into question the validity of the syndrome-based schema and related diagnostic methods of acquired language disorders. More generally, this putative variability has cast serious doubts on the feasibility of localizing linguistic operations in cortex. We present a new approach to the quantitative analysis of deficient linguistic performance, and apply it to a large data set, constructed from the published literature: Comprehension data of 69 carefully selected Broca’s aphasic patients, tested on nearly 6000 stimulus sentences, were partitioned in different ways, and subjected to a series of analyses. While a certain amount of variability is indeed evident in the data, our quantitative analyses reveal a highly robust selective impairment pattern for the group: the patients’ ability to analyze syntactic movement is severely compromised, in line with the Trace-Deletion Hypothesis. Further analyses suggest that patients’ performance on no-movement sentence types exhibits less variation than on sentences that contain movement. We discuss the clinical and theoretical implications of our results.
The first report, on tuberose surface morphology of strontium hydroxide (Sr(OH)2) has been achieved on stainless-steel (SS) substrate in the form of thin film by easy, economical efficient and less time consuming successive ionic layer adsorption and reaction (SILAR) technique at room temperature. X-ray diffraction analysis reveals polycrystalline nature of film with orthorhombic crystal structure. Fourier Transmission Infrared Spectroscopy (FTIR), Energy-dispersive X-ray spectroscopy (EDS) and Raman analyses reveal the composition and phase purity of the active material. The morphology of the prepared sample was characterized by Field Emission Scanning Electron Microscopy (FE-SEM), Higher Resolution Transmission Emission Microscopy (HR-TEM) which confirms the tuberose morphology of the Sr(OH)2 thin film. Furthermore, tuberose surface architecture has been successfully utilized as supercapacitive electrode with high specific capacity of 413Cg−1 in 1M NaOH aqueous electrolyte at 2Ag−1 current density. Also, the electrode has emerged with 45.95Whkg−1 of energy density and 2.6kWkg−1 as power density at 2Ag−1 current density.
Acute oral toxicity studies were conducted on samples of nine unique nickel compounds and two complex materials to comply with the data and classification requirements of the new Registration, Evaluation, and Authorization of Chemicals Regulation (REACH) in Europe. The samples tested in this study confirmed the overall low oral toxicity of nickel substances and demonstrated a wide range of LD50 values extending from 310 to >11,000mg/kg. This variation highlights the differences in toxicological properties between various forms of nickel and underscores the importance of Ni(II) ion bioavailability in determining toxicity. The relative acute oral toxicity of the various nickel substances was found to be: nickel fluoride, nickel sulfate, nickel chloride, nickel acetate>nickel sulfamate>nickel hydroxycarbonate>nickel dihydroxide ≫ nickel subsulfide, nickel oxides, nickel ash, nickel mattes. Based on these data, four nickel compounds would receive a Category 4 acute toxicity classification according to the European Regulation on Classification, Labelling and Packaging of Chemical Substances and Mixtures (CLP), while the rest of the nickel substances tested fit the criterion for no classification. These data also provided the in vivo verification needed to perform read-across for additional oral toxicity endpoints and nickel substances.
There is an ever-increasing interest in utilization of natural biomass for rational design and fabrication of advanced carbon materials towards energy-related storage/conversion application. In this work, we successfully prepared an in-situ nitrogen-doped porous carbon nanosheet (NPCN) materials derived from renewable silk cocoon via a facile simultaneous activation and carbonization approach using metal salt FeCl3 and ZnCl2 as chemical activating agent. The as-prepared carbon materials were fully characterized to determine their morphology and structure features, and it was found that the obtained NPCN has a unique interconnected sheet-like morphology and a hierarchically porous structure with a relatively high specific surface area of 1540m2 g−1 and a large pore volume of 1.85cm3 g−1. Owing to the inherent nitrogen-containing functional groups existing in the silk cocoon, in-situ doping of nitrogen heteroatom can be realized by the carbonization treatment, which can efficiently boost the electrical conductivity of the porous carbon nanosheets. By employing the NPCP as a reservoir to impregnate sulfur for lithium-sulfur batteries, the resulting carbon/sulfur composite (NPCN/S) shows a remarkably improved rate performance and superior long-term cycling stability with an extremely low decay rate (0.1% per cycle) up to 300 cycles at a high rate of 2C (3350mAg−1). What is more, a Coulombic efficiency of approximatively 100% is obtained. Taking into consideration various factors including sustainable development, low-cost carbon source, and facile mass production, this work shows a great scientific significance and promising prospect in scalable preparation of advanced carbon-based host matrix for the efficient immobilization of sulfur towards developing high performance lithium-sulfur batteries.
The paper is concerned with biohydrometallurgical methods of cadmium recovery from spent Ni–Cd batteries. Cd leaching efficiency from electrode material in different media (H2SO4 and Fe2(SO4)3 solutions), at different Fe(III) concentrations and using the bacteria Acidithiobacillus ferrooxidans were investigated. The main aim of this study was to understand which from the bioleaching products (sulphuric acid or ferric sulphate) play a main role in the bioleaching process of Cd recovery. The influence of Fe ions on Cd leachability was confirmed. The best leaching efficiency of Cd (100%) was reached by bioleaching and also by leaching in Fe2(SO4)3 solution. The results of X-ray diffraction confirmed that no cadmium was present in solid residuum obtained after the Cd bioleaching as well as Cd leaching using solely ferric iron. The use of H2SO4 solution resulted in the lowest efficiency of Cd leachability, the presence of hydroxides in electrode materials caused neutralization of the leaching solution and inhibition of Cd leaching.
Equations that describe the voltage variations with time of rechargeable batteries during charging and discharging were used to determine the component values of the equivalent circuit of nickel–metal hydride batteries under different states of charge (SOC). The equivalent circuit of the battery was described as an ideal voltage source in series with a resistor and the parallel combination of a resistor and a capacitor. The battery model used different values of resistance and capacitance, in the parallel combination, during the different phases of the discharge–rest–charge–rest sequence. The results show that the resistances in the equivalent circuit are approximately constant with variations in the SOC. For the discharge and charge phases the capacitor value increased and decreased, respectively, as the SOC decreased. The value of the capacitor in the parallel RC circuit is an indicator of the battery SOC.
A heat-resistant and rigid-flexible coupling glass-microfiber nonwoven supported cyanoethyl-β-polyvinyl alcohol composite polymer electrolyte membrane (GFMPE) has been successfully fabricated explored for high-performance lithium batteries. It was demonstrated that the GFMPE possessed enhanced mechanical property, superior dimensional thermostability (>200°C). In addition, Ethylene carbonate (EC)/Dimethyl carbonate (DMC) solvent soaked GFMPE exhibited a superior Li ion transport number of 0.86, wide electrochemical window up to 4.8V vs Li+/Li and high ionic conductivity of 0.89mS/cm at 25°C. Moreover, LiCoO2/graphite cells using such polymer electrolyte with EC:DMC (1:1, v/v) showed excellent cycling stability and superior rate capability at room temperature. It is important to note that the LiFePO4/Li cell using GFMPE/propylene carbonate (PC) can also operate very well at an elevated temperature of 120°C. These fascinating results would endow GFMPE a very promising polymer electrolyte in high-performance lithium batteries with improved safety and reliablity.
Reduced graphene oxide/carbon black (rGO/CB) hybrid films with different carbon black (CB) contents are prepared by a simple vacuum filtration method. The CB particles evenly distribute between the graphene layers, not only preventing the compact restack of rGO sheets but also providing electrical contact between the base planes of rGO sheets. As expected, the as-prepared rGO/CB hybrid film shows enhanced rate capability when compared with rGO film. Furthermore, a solid-state flexible supercapacitor has been constructed with the optimized rGO/CB hybrid film by using polyvinyl alcohol (PVA)/H2SO4 gel as electrolyte and Au coated PET film as current collector and mechanical support. The solid-state flexible supercapacitor shows a specific capacitance of 112 F g−1 at a scan rate of 5 mV s−1, and excellent rate performance with a specific capacitance of 79.6 F g−1 at a high scan rate of 1 V s−1. Moreover, the flexible solid-state supercapacitor exhibits good cycling stability with capacitance retention of 94% after 3000 cycles in normal state plus 2000 cycles in bent state.
Ultralife Polymer™ brand batteries for cellular phones as made by Nokia Mobile Phones Incorporated were introduced in July 2000. Characteristics of the UBC443483 cell and UB750N battery are described and related to the power and battery requirements of these cellular phones and chargers. Current, power, and pulse capability are presented as functions of temperature, depth of discharge, and storage at the cell level. Safety protection devices and chargers are discussed at the battery pack level, as well as performance in cellular phones under various wireless communication protocols. Performance is competitive with liquid lithium-ion systems while offering opportunity for non-traditional form factors.
Poor quality of care is among the causes of high maternal and newborn disease burden in Tanzania. Potential reason for poor quality of care is the existence of a “know-do gap” where by health workers do not perform to the best of their knowledge. An electronic clinical decision support system (CDSS) for maternal health care was piloted in six rural primary health centers of Tanzania to improve performance of health workers by facilitating adherence to World Health Organization (WHO) guidelines and ultimately improve quality of maternal health care. This study aimed at assessing the cost of installing and operating the system in the health centers.
Polymer electrolytes based on the mixture of the blended polymer matrix (P(VdF-co-HFP)(Kynar 2801)/poly(vinyl acetate)(PVAc)) and the liquid electrolyte(EC/PC/1M LiClO4) were prepared by solution casting. Ionic conductivity, interfacial stability with the lithium electrode, and electrochemical stability window of the polymer electrolytes were investigated by varying the PVAc content in the matrix polymer. The ionic conductivity of the plasticized polymer electrolyte slightly decreased with the PVAc content. The ionic conductivity of the polymer electrolyte based on the Kynar 2801/PVAc (7/3, w/w) blend was 2.3×10−3 S cm−1 at 25°C. Interfacial stability between the polymer electrolyte and the lithium electrode was enhanced by blending PVAc with the Kynar 2801. The polymer electrolyte based on the Kynar 2801/PVAc (7/3, w/w) blend was electrochemically stable up to 5.0 V.
People with advanced cancer experience different sequelae which have unique effects on quality of life (QOL). The patient-generated index (PGI) is a personalized measure that allows patients to nominate, rate, and value areas that have the most impact on QOL. Fatigue, pain, and aspects of physical function are among the top 10 areas with QOL impact. An area of validation that is lacking for the PGI is the extent to which spontaneously nominated areas of QOL that patients are concerned with, agree with ratings obtained from standard patient reported outcomes (PROs).
Lithium storage materials with porous and sheet-like structure are featured with favorable electrode/electrolyte accessibility and a shortened lithium diffusion distance, which can possess a fast electron and ion transportation. Here, a synchronous carbonization and phosphorization method was developed to synthesize flower-like CoP/C nanosheets by using Co-based metal organic complex as a precursor. The flower-like CoP/C nanosheets electrode exhibits a high initial Coulombic efficiency and excellent specific capacity. A reversible capacity of 612 mAh g−1 is obtained at a current density of 400 mA g−1 after 500 cycles. When used as a hydrogen evolution reaction electrocatalyst in acidic media, the unique flower-like CoP/C nanosheets perform an onset over potential of 151 mV and a Tafel slope of 128 mV dec−1. As a consequence, the flower-like CoP/C nanosheets are a promising material for lithium ion batteries and hydrogen evolution reaction.
An effective non-precious bare NiCo2O4 (NCO) micro-shrubs and graphene (rGO) supported hybrid catalysts (NCO/rGO) were prepared by a simple urea assisted one-pot hydrothermal route. The authors were motivated to investigate an influence of synergistic effect between NCO nanoparticles and rGO sheets of freshly prepared hybrid catalysts (NCO/rGO) by adjusting the starting metal (nickel & cobalt nitrate hexahydrate) precursors, which has been denoted as 50 NCO/rGO, 100 NCO/rGO & 150 NCO/rGO in the present work. All the freshly prepared rGO, NCO and rGO supported hybrid catalysts with three different NCO mass loading samples were characterized through different characterization techniques such as XRD, FT-Raman, HR-SEM, HR-TEM, LSV, CV and galvanostatic charge/discharge studies, respectively. Among them, the rGO supported hybrid catalyst with lower amount of NCO mass loading (50 NCO/rGO) exhibits an outstanding oxygen reduction reaction (ORR) activity with lower onset potential, high limiting current density via. four-electron mechanism in an O2-saturated 0.1 M KOH electrolyte solution at room temperature. In addition, the specific capacitance of hybrid electrode is found to be 1305 F g-1 at a scan rate of 5 mV s−1 with 89% retention of cyclic stability even after 3000 cycles. The observed electrocatalytic activity and capacitive performances of an optimized hybrid sample (50 NCO/rGO) is strongly indicates an influence of better synergistic effect between NCO nanoparticles and rGO nanosheets. Hence, an optimized rGO supported hybrid catalyst (50 NCO/rGO) could be a promising electrocatalyst as well as hybrid electrode for metal-air batteries and supercapacitor applications, respectively.
A unique cobalt nanomountain array supported Si film was successfully fabricated by the combination of electrodeposition and radiofrequency magnetron sputtering. The nanostructured Si film with a proper thickness shows excellent cyclic performance with a high discharge capacity of 1917.8mAhg−1 after 100 cycles at 0.1C, also presents high rate capability with revisable capacities of 1953.3mAhg−1 at 0.5C and 1166.1mAhg−1 at 3C. The improved electrochemical performance can be attributed to the strengthening adhesion of the Si film to the cobalt nanomountain arrays and the formation of an island structure within the film, which provide good mechanical support and electron conducting pathway. The well-designed nanostructured Si electrode is a promising material for application of lithium ion batteries.
In order to select the effective health index and build reasonably the prediction model for prognostics, a new approach is proposed. The generative topographic mapping-based negative likelihood probability is used as the health index, and K-means clustering algorithm is employed for state division. The adaptive prediction model based on Markov model and least mean square algorithm is built by the historical data and the online monitoring data. According to the given threshold, the remaining life can be captured. Based on experimental verification, the results indicate that the selected health index is able to effectively reflect the condition of rolling bearings and the proposed model shows high prediction accuracy in comparison to the common one.