bluuebunny/crossref_metadata_2025_split huggingface dataset:
Autism and Neurodiversity: Addressing Concerns and Offering Implications for the School-Based Speech-Language Pathologist
Authors: DeThorne Laura S. , Searsmith Kelly 
Published: December 2020

PurposeThe purpose of this article is to address some common concerns associated with the neurodiversity paradigm and to offer related implications for service provision to school-age autistic students. In particular, we highlight the need to (a) view first-person autistic perspectives as an integral component of evidence-based practice, (b) use the individualized education plan as a means to actively address environmental contributions to communicative competence, and (c) center intervention around respect for autistic sociality and self-expression. We support these points with cross-disciplinary scholarship and writings from autistic individuals.ConclusionsWe recognize that school-based speech-language pathologists are bound by institutional constraints, such as eligibility determination and Individualized Education Program processes that are not inherently consistent with the neurodiversity paradigm. Consequently, we offer examples for implementing the neurodiversity paradigm while working within these existing structures. In sum, this article addresses key points of tension related to the neurodiversity paradigm in a way that we hope will directly translate into improved service provision for autistic students.Supplemental Materialhttps://doi.org/10.23641/asha.13345727
Distribution system reconfiguration in presence of Internet of things
Authors: Mohseni Moaiad , Joorabian Mahmood , Lashkar Ara Afshin 
Published: December 2020

AbstractNetwork reconfiguration (NR) has undergone new changes to adapt to smart grid evolution. Internet of things (IoT) has found its way to smart grids especially in the distribution systems. Demand‐side management can be more efficient in the presence of IoT. IoT‐based energy management systems can have bidirectional communication with smart grids and decide according to their preferences, time‐of‐use (TOU) pricing, and their flexible devices. Therefore, customers would consume electricity more interactively. Consequently, the total load profile will be changed and a new NR approach must be adopted to meet load demands. So, the selection of critical switches must be modified to achieve the most effective network resource utilisation. For this purpose, a mixed‐integer linear programming model for feeder reconfiguration is presented considering the customers’ behaviours in the IoT environment. At first, the customer manner is investigated at different prices and preferences. Then the total load profile is calculated considering the normal distribution of uncertain customer preference factors. Finally, the identification of critical switches is obtained using the proposed method. The optimisation is done in YALMIP and MOSEK toolboxes. Results show the effectiveness of the proposed method to efficient utilisation of IoT potentials and renewable energy benefits.
Monitoring of power system dynamics under incomplete PMU observability condition
Authors: Ortiz Gabriel , Rehtanz Christian , Colomé Graciela 
Published: December 2020

AbstractThis work presents a hybrid state estimation procedure that allows power system dynamics associated to slow and fast transient events to be accurately monitored considering a limited amount of phasor measurement units. The proposal represents an enhanced version of a previously developed static state estimation approach. This time, two main changes are introduced. First, a weighted least absolute value estimator instead the conventional weighted least square technique is used to estimate bus voltages in transient regime. This makes the estimation process more robust at fast scan rates. Second, an extended Kalman filter based dynamic state estimator is integrated. Thus, the proposed scheme is able to estimate, along with static variables, dynamic variables of all generators and motors in the power system regardless of the availability of phasor measurement unit measurements at terminal buses. This is possible thanks to a novel data‐mining based methodology for full phasor measurement unit observability restoration. Performance parameters such as accuracy, computing time and convergence properties are assessed by applying the estimation procedure to the New England benchmark system under different operating conditions.
A content‐dependent Daltonization algorithm for colour vision deficiencies based on lightness and chroma information
Authors: Shen Xuming , Feng Jianhua , Zhang Xiandou 
Published: December 2020

AbstractTo help CVD (colour vision deficiency) observers distinguish among different colours in digital images, this study proposes a content‐dependent Daltonization algorithm based on lightness and chroma information. This improves the trade‐offs in contrast, naturalness, and colour consistency deficiencies found in existing methods. Chroma remapping and brightness adjustments on image content are utilized to increase contrast and maximize the preservation of the original hue. In a quantitative study, the proposed method proved more useful for dichromats than did existing methods. The evaluation by research subjects showed that the method was superior to the current methods in balancing contrast, naturalness, and colour consistency.
Meaningful ciphertext encryption algorithm based on bit scrambling, discrete wavelet transform, and improved chaos
Authors: Jing Shiwei , Guo Yuan , Chen Wei 
Published: December 2020

AbstractThis paper proposes a meaningful ciphertext encryption algorithm of good practicability and strong robustness. The plaintext undergoes pre‐encryption of bit scrambling and secondary encryption of discrete wavelet transform (DWT) to obtain meaningful ciphertext. In the pre‐encryption stage, only the higher three bit pages that are not all 0 or 1 are scrambled. The embedding method in the secondary encryption process is to add the hundreds and tens’ digit and ones’ digit of the middle ciphertext to the scrambled detail information obtained by DWT of the cover image. The information entropy of the intermediate ciphertext obtained by this method can reach 7.997, the correlation coefficient between the ciphertext and the cover image can reach 0.99, and the decrypted image of the ciphertext under high‐intensity pollution can still be identified. It shows that the pre‐encryption can conceal the plaintext information well, and the secondary encryption can eliminate the ciphertext texture characteristics while retaining the good robustness. Finally, the improved three one‐dimensional chaos are used to generate random sequences, and the plaintext hash value is associated with the chaotic key. The improved chaos greatly improves the randomness of the sequence and broadens the range of parameters. The hash value SHA‐256 of the plaintext is added to make the key stream adaptively change with the plaintext, which greatly improves the sensitivity of the plaintext and the ability to resist selected plaintext and ciphertext attacks. Experiments have also verified that the encryption algorithm can encrypt images of different types and shapes and has strong practicability, good bit scrambling effect, and high sensitivity to scrambling.
Artefact‐free image stitching via a better normed seam‐cutting energy function
Authors: Qiu Xiangyan , Li Qiaoliang 
Published: December 2020

AbstractImage stitching, as the important field of computer graphics and vision, has received much attention in recent years. Image stitching techniques are generally decomposed into two phases: image alignment, which aligns target images with the reference images; and image composition, which fixes ghosting and visual artefacts. This work aims to propose a new strategy for the seam‐cutting method which provides visually appealing result. Seam‐cutting is one of the most influential methods in image composition, which can relieve artefacts and produce plausible results. However, it is observed that the state‐of‐the‐art seam‐cutting approaches usually lead to undesirable seams in some challenging scenes. Here, the authors put forward a novel seam‐cutting method by defining a new energy function. This method uses power of norm as a colour difference which can magnify the weight of colour distinction to avoid undesirable seams and artefacts. The proposed method can be easily implemented. The test images are collected from the public available challenging datasets and taken by ourselves. Experiments demonstrate that the proposed method can create comparable or even better stitching results compared to other state‐of‐the‐art seam‐cutting approaches.
Encapsulated virgin coconut oil as a nanoscale in vitro solution against multiple drug resistant Staphylococcus aureus
Authors: Talib A. , Manzoor K. N. , Ijaz A. , Adnan F. , Javed F. , Khan A. A. 
Published: December 2020

AbstractNiosomes are excellent nanoscale vehicular systems that can carry a variety of drugs and (bioactive) compounds entrapped inside them. Virgin coconut oil (VCO) is the finest grade of coconut oil that is highly enriched with phenolic content, antioxidant activity and also comprises medium chain triglycerides. In this work, niosomes were encapsulated with VCO synthesized by a simple chemical method. The electron microscopy confirmed that spherical nanostructured lipid carrier molecules with a diameter in the range of 180–190 nm were produced. A zeta potential value of −42 mV was a testimony that these nanovehicles were having good stability. The natural oil loaded nanocarrier spheres proved to be potent antibacterial nano‐antibiotics against multiple drug resistant (MDR) bacteria. The antibacterial activity of these magic nano‐spheres was found to be better than ZnO (metallic oxides) nanoparticles. The nano‐antibiotics resulted in 17, 14 and 12 mm zones of inhibition against methicillin‐resistant Staphylococcus aureus (MRSA), vancomycin‐resistant S. aureus (VRSA) and a (general) MDR strain of S. aureus in contrast to nanoparticles that resulted in zones of inhibitions 7, 8 and 6 mm for the same bacterial strains. Niosomes prove to be an excellent nanocarrier system that can encapsulate a number of bio‐active compounds.
Lubrication of sliding silicon MEMS devices using ferrofluids‐based magnetic matrix texture
Authors: Tonggang Liu , Chhattal Muhammad , Kun You , Zili Lin 
Published: December 2020

AbstractThis paper aims to explore the possibility of using ferrofluids for the lubrication of MEMS devices under the influence of different magnetic field texture configurations. For the investigation of proposed work, a novel silicon‐based pin‐on‐disk friction pair is designed in such a way that it mimics MEMS devices. The ferrofluids‐based magnetic matrix texture was formed by low viscous ferrofluids and specially arranged thin cylindrical magnets matrix. For the investigation of the lubrication performance of ferrofluids lubricated specimens, tribological tests, and surface morphology analysis were carried out under different magnetic textures on a reciprocating tribometer and an optical microscope. The results show that the magnetic textures distributions on the friction‐pair have a significant influence on the lubrication properties of ferrofluids. This magnetic texture has the potential to properly position and retains the ferrofluids on friction‐pair, increase the load‐bearing capacity, and result in a significant reduction in wear and friction. The results also show that there exists the optimal magnetic matrix texture configuration which shows the best tribological performance when lubricated with ferrofluids.
Influence of thickness of SiO2 layer on the performance of SINW sensors
Authors: Wang Hui , Chen Shixing , Wang Yuelin , Li Tie 
Published: December 2020

AbstractSilicon nanowire devices employed traditional MEMS technology has the advantages of low cost and easy to batch fabricated, which can be applied for high‐sensitivity biological and chemical species detection. In the preparation process, the device performance would be greatly influenced by the BOE corrosion process of silicon oxide outside silicon nanowires, which will define the performance of devices in subsequent test. In this paper, pH solution test was used to characterize the response sensitivity of silicon nanowires in different etching times, with the help of SEM and I–V characteristics before and after corrosion, it can be found that the thickness of silicon oxide layer enclosed nanowires was gradually reduced until completely etched in about five minutes to expose the silicon nanowires, which revealed that the silicon nanowires could start to sense and respond to external stimulus only when the silicon oxide was very thin even disappeared. The effect of corrosion could be equivalent to the influence of silicon oxide thickness on device performance. It provides an effective way to control the fabrication process of high performance devices.
In situ synthesis of metal‐free N‐GQD@g‐C3N4 photocatalyst for enhancing photocatalytic activity
Authors: Cao Yang , Sheng Luyang , Cheng He , Wang Congxue , Sun Youyi , Fu Qiang 
Published: December 2020

AbstractGraphitic carbon nitride modified with N‐doped graphene quantum dot (N‐GQDs/g‐C3N4) was prepared by an in situ method, in which the g‐C3N4 was synthesized in the presence of N‐GQD. Furthermore, the structure and photocatalytic degradation performance of in situ synthesised N‐GQDs/g‐C3N4 were investigated and compared with N‐GQDs/g‐C3N4 prepared by traditional mixing method. The removal efficiency was about 98.0% for the photocatalytic degradation of RhB after 70 min, which was larger comparing with other GQDs/g‐C3N4 reported in previous works. The result was attributed to uniform distribution of N‐GQDs on surface of g‐C3N4, leading to more photogenerated electrons transfer. This work did not only report a new synthesis method of N‐GQDs/g‐C3N4, but also provided a new method to improve photodegradation performance of photocatalyst based on g‐C3N4.
Au/CQDs‐TiO2 composite nanorod array film with simple preparation route and enhanced visible light response
Authors: Wang Meiling , Jian Aoqun , Jia Huaping , Yang Ting , Zhang Xuming , Sang Shengbo 
Published: December 2020

AbstractThis paper successfully prepared a unique titanium dioxide nanorod arrays nanocomposite doped with carbon quantum dots and gold nanoparticles as a high‐efficiency photocatalyst. Due to their enhanced electron–hole separation efficiency and strong light‐scattering effects, one‐dimensional nanostructured titanium dioxide nanorods were utilised as the basic material for photocatalysis. Furthermore, gold nanoparticles and carbon quantum dots modified on the surface of titanium dioxide nanorods were used as visible light absorbers and photosensitisers, respectively. As a result, a photocurrent of 14 mA·cm‐2 was achieved by Au/CQDs‐TiO2 nanorods composite in the photoelectrochemical measurements, which exceed five times that of pure titanium dioxide nanorods. The synergistic effect of gold nanoparticles and carbon quantum dots was demonstrated by several characterisation techniques. The proposed Au/CQDs‐TiO2 nanorods nanocomposite film developed by simple successive ionic layer adsorption and reaction and hydrothermal methods offers a practical solution for current environmental and energy issues.
Preparation and electrochemical performance of chemical‐activated carbon foam
Authors: Wu Ye , Bao Wenyun , Xie Yibing , Yao Chen 
Published: December 2020

AbstractThree‐dimensional porous carbon foam is fabricated by thermal pyrolysis of melamine foam and applied for energy storage electrode material. The increase of carbonization temperature is beneficial to improving graphitization degree and meanwhile lowing mechanical stability of carbon foam. KOH and Ni(NO3)2‐activated carbonization is applied to further improve graphitization of carbon foam, leading to the improved conductivity. The ohmic resistance declines from 305 Ω cm–1 for bare carbon foam to 198 Ω cm–1 for KOH‐activated one and 58 Ω cm–1 for Ni(NO3)2‐activated one. The specific capacitance increases from 0.371 mF cm–2 for bare carbon foam to 0.905 mF cm–2 for KOH‐activated one and 1.267 mF cm–2 for Ni(NO3)2‐activated one at the current density of 0.1 mA cm–2. The activation thermal carbonization can improve the electroactivity of carbon foam. The fractured framework lowers mechanical stability of the chemical‐activated carbon foams. Ni(NO3)2‐activated carbon foam shows higher graphitization degree and electrical conductivity than KOH‐activated one, accordingly contributing to higher electrochemical capacitance and rate capability. Ni(NO3)2‐activation become more effective to enhance graphitization degree of carbon foam.
A high‐power quality battery charger for light electric vehicle using switched inductor PFC converter
Authors: Kushwaha Radha , Singh Bhim 
Published: December 2020

AbstractThis work is focused on a new power quality improved battery charger for electric vehicle using a two switch power factor correction (PFC) single‐ended primary inductance converter (SEPIC) at the front‐end followed by a flyback converter. The single‐ended primary inductance converter is a high step‐up PFC converter with a switched inductor configuration at the input. Over a conventional single‐ended primary inductance converter, this new configuration operates with reduced duty ratio for a given DC‐link voltage. By using few additional components, this new single‐ended primary inductance converter offers reduced switch voltage stress to produce the same DC‐link voltage. The operation at lower duty cycle, gives the improved efficiency over a conventional SEPIC PFC converter. The built‐in advantage of soft switching in devices, is achieved due to discontinuous conduction mode based design for both power factor correction converter and flyback converter. The power quality improvement in charger is validated at steady state as well as under variation in input voltage and DC‐link voltage, to meet the IEC 61000‐3‐2 regulations. Performance of this charger is verified in constant current mode with high step‐up gain of power factor correction converter and lower stress across the devices over a conventional single‐ended primary inductance configuration.
A single‐stage step‐up inverter with reduced devices count
Authors: Hu Xuefeng , Liu Xing , Zhang Yujia , Yu Zhixiang , Li Yan , Yao Zhilei , Yang Yunhu 
Published: December 2020

AbstractThis study presents a single‐phase single‐stage step‐up inverter (SSSI), which can be used as an interface converter in micro‐source generation systems such as photovoltaic (PV) and fuel cells. The proposed inverter has several appealing features. (1) It can provide an AC output voltage higher than its DC input because of the built‐in boost circuit. (2) It has characteristics of a simple structure and reduces the component counts and cost. (3) The shoot‐through problem for the power devices can be avoided in the proposed SSSI. (4) metal‐oxide‐semiconductor field‐effect transistors (MOSFETs) can be used without reverse recovery issues of body diodes. Therefore, high system reliability and efficiency can be obtained. This study describes the operating principles in discontinuous conduction mode (DCM), pulse‐width modulation strategy, and parameter design guidelines. In order to verify the feasibility and performance of the converter, experimental results are obtained from a lab prototype.
Research on balance control strategy of single capacitor clamped five‐level inverter clamping capacitor
Authors: Ye Manyuan , Wei Qiwen , Li Song , Ren Wei , Song Guizhi 
Published: December 2020

AbstractA five‐level inverter composed of a single capacitor clamped three‐level topology and a half‐bridge is introduced, and a new SPWM control strategy for this topology is proposed. The strategy uses two modulation waves with opposite directions to modulate the positive and negative half‐cycle interleaved carriers. By controlling the charging and discharging times of the clamping capacitor in each carrier cycle, the voltage balance control of the clamping capacitor is achieved. At the same time, a single‐phase capacitor clamped five‐level inverter is taken as an example to analyse the principle of the capacitor balance control strategy in detail, and to verify the correctness and feasibility of the control strategy through simulation research and experimental results.
Small signal modelling and stability analysis of internal ramp compensated constant on‐time controller with improved output voltage accuracy for point of load application
Authors: Peng Kang , Chen Keng , Petruzzi Luca , Chen Min , Lee BangSup , Clavette Danny 
Published: December 2020

AbstractThis paper investigates a constant on‐time controller (COT) with internal ramp compensation and improved output voltage accuracy for point of load applications. The pulse width modulation (PWM) output is generated based on internal ramp: by sensing the regulated output voltage and comparing it to an internal reference target, an error signal is generated. This error signal is used to generate a reference for an added ramp signal, which is compared against an error voltage to generate a PWM trigger signal. An adaptive constant on‐time scheme ensures a fairly constant switching frequency over a wide range of input and output voltages. This COT control algorithm is able to achieve high accuracy regulation (±0.5% of target) and fast transient response during load step change. A frequency domain small signal model is proposed, and an open loop gain transfer function is developed for this COT control system. The proposed small signal model and design analyses are verified with SIMPLIS simulations and experimental results.
A new enhanced‐boost switched‐capacitor quasi Z‐source network
Authors: Hosseini Seyyed Majid , Ghazi Reza , Nikbahar Ali , Eydi Mohammad 
Published: December 2020

AbstractThis paper proposes a new enhanced‐boost non‐transformer‐based impedance source network. The strong boosting ability of the proposed topology is realized by making use of the switched capacitor concept in the formerly introduced enhanced‐boost quasi Z‐source network (EB‐qZSN) without any additional active switch. Meanwhile, the advantages of the EB‐qZSN such as input current continuity and shared ground between the input and the output are maintained. In addition to the lower shoot‐through requirement to obtain high voltage gains, the proposed impedance network takes advantage of a smaller size of passive components along with a lower input current ripple to achieve higher power density and higher efficiency. Moreover, the lower total rating of the switching elements, defined by switching device power, directly translates to lower cost for the proposed method. The operation principles and the design guideline of components are explained in detail and a thorough comparison with other ZSN is presented. A 240W DC–DC prototype converter was built to validate the performance principles and properties of the proposed impedance network.