bluuebunny/crossref_metadata_2025_split huggingface dataset:
Porous and Hierarchically Structured Ammonium Nickel Molybdate/Nickel Sulfide/Reduced Graphene Oxide Ternary Composite as High Performance Electrode for Supercapacitors
Authors: Ke Tai‐Chun , Vedhanarayanan Balaraman , Shao Li‐Dong , Lin Tsung‐Wu 
Published: July 2019

AbstractA novel ternary composite composed of ammonium nickel molybdate, nickel sulfide and reduced graphene oxide (ANM‐NiS‐rGO) has been synthesized by using a two‐step hydrothermal method for the first time. The morphological analysis reveals that the rGO nanosheets in the ternary composite are decorated with the electrochemically active NiS nanoparticles and ANM microflowers. Because the ternary composite exhibits a porous and 3D flower‐like structures, it possesses the large surface area of 135 m2 g−1 and high pore volume of 0.258 cm3 g−1. On the other hand, ANM‐NiS‐rGO was investigated as positive electrode for battery‐type hybrid supercapacitor that shows a specific capacity of 150 mAh g−1 at a current density of 1 A g−1. For comparison, the corresponding components such as ANM‐rGO and NiS‐rGO were also investigated. It was found that the ternary composite shows a higher specific capacity, better rate capability and cyclic stability compared with the binary composites as the former possesses higher surface area and electrical conductivity. To demonstrate the practical applications, a hybrid supercapacitor was fabricated by using ANM‐NiS‐rGO and rGO as the positive and negative electrodes, respectively. This device can be operated in the voltage range of 0–1.75 V and shows a high specific capacity of 28 mAh g−1 at a current density of 2 Ag−1. Furthermore, the device delivers a maximum energy density of 24.2 Wh kg−1 at a power density of 1.75 kW kg−1. These results suggest that the porous and hierarchically structured ANM‐NiS‐rGO has high potential in practical energy storage applications.
An efficient scheme for SDN state consistency verification in cloud computing environment
Authors: Wang Xiaoyan , Chen Xingshu , Wang Yitong , Ge Long 
Published: July 2019

SummarySoftware‐defined networking (SDN) decouples the control and data planes to simplify network management and function deployment. SDN provides a solution for managing large‐scale virtual networks in the cloud environment. However, in the process of SDN network update, various attacks can lead to network state inconsistency. In this paper, a comprehensive and efficient verification scheme is proposed to defend the security threats and guarantee the network state consistency in the cloud environment. The scheme verifies the consistency of network update from two stages of network update request and response. Firstly, the flow path model and the security space are abstracted to quickly verify whether the network request is allowed. Then, a novel forwarding path probing and verification method is designed to validate the actual forwarding path and locate the abnormal path in real time. With the two‐stage verification, the scheme can prevent the spread of illegal flow rules and ensure the correct delivery and execution of flow rules. Finally, we carry out a series of experiments in OpenStack. The results show that the proposed scheme can detect security threats and label the abnormal forwarding path in real time to ensure the network state consistency, while introducing negligible performance overhead.
Efficient privacy‐preserving scheme supporting disjunctive multi‐keyword search with ranking
Authors: Handa Rohit , Rama Krishna C. , Aggarwal Naveen 
Published: July 2019

SummaryInformation storage and retrieval from the cloud is growing continuously unabated. The cost‐efficient solutions offered by the cloud providers to the end‐users have motivated them to outsource their confidential data to the cloud. Outsourcing confidential data leads to enhanced privacy risks due to disclosure of sensitive information to adversaries. To handle this disclosure of information, encryption is preferred, but it hinders the efficient searching on the documents. The existing searchable encryption schemes either focused on optimization of search time or improvement of search efficiency. To solve this trade‐off between search time and search efficiency, we propose an efficient disjunctive search scheme using non‐positional inverted index. To the best of our knowledge, there is no searchable encryption scheme based on the non‐positional inverted index in the literature. Thus, we first propose a basic scheme based on a non‐positional inverted index to search the desired keywords and highlight its inefficiency in terms of high search time required. To perform efficient searching, an extended search scheme is proposed using keyword binning, which reduces comparisons required and improves the search time. The extended search scheme has recall of 100% and precision 99.75%. The experimental analysis of the proposed scheme on real datasets proves that the proposed scheme is privacy‐preserving and efficient.
Parallel particle swarm optimization classification algorithm variant implemented with Apache Spark
Authors: Al‐Sawwa Jamil , Ludwig Simone A. 
Published: July 2019

SummaryWith the rapid development of technologies such as the internet, the amount of data that are collected or generated in many areas such as in the agricultural, biomedical, and finance sectors poses challenges to the scientific community because of the volume and complexity of the data. Furthermore, the need of analysis tools that extract useful information for decision support has been receiving more attention in order for researchers to find a scalable solution to traditional algorithms. In this paper, we proposed a scalable design and implementation of a particle swarm optimization classification (SCPSO) approach that is based on the Apache Spark framework. The main idea of the SCPSO algorithm is to find the optimal centroid for each target label using particle swarm optimization and then assign unlabeled data points to the closest centroid. Two variants of SCPSO, SCPSO‐F1 and SCPSO‐F2, were proposed based on different fitness functions, which were tested on real data sets in order to evaluate their scalability and performance. The experimental results revealed that SCPSO‐F1 and SCPSO‐F2 scale very well with increasing data set sizes and the speedup of SCPSO‐F2 is almost identical to the linear speedup while the speedup of SCPSO‐F1 is very close to the linear speedup. Thus, SCPSO‐F1 and SCPSO‐F2 can be efficiently parallelized using the Apache Spark framework.
DDL‐QoS: A dynamic I/O scheduling strategy of QoS for HPC applications
Authors: Yang Ying , Shi Xuanhua , Liu Wei , Jin Hai , Hua Yusheng , Jiang Yan 
Published: July 2019

SummaryWith the increasing cloud‐trend of high‐performance computing (HPC), more users submit their applications simultaneously to the platform and wish they could finish before the deadline. Moreover, due to the severe holistic performance degradation caused by I/O contention, a deadline‐sensitive I/O scheduler is needed to allocate storage resources according to the requirements of applications and resultantly guarantee the quality of service (QoS) of concurrently running applications. In this paper, we first explore the bandwidth allocation phenomenon caused by interference in applications through the modeling of historical data, and then we quote a metric called random percentage that can represent the random degree of the applications and be used to guide I/O scheduling in the later stage. We design a dynamic I/O scheduler named DDL‐QoS that uses solid state drives(SSDs) as QoS guarantee to minimize interference and ensure applications meet their deadline. The potential of our design is that the greater the I/O interference, the greater the performance improvement, but this performance improvement will be limited by the physical properties of the storage hardware.
From fine‐needle aspiration cytology to fluorescent in‐situ hybridization in an unusual case of pharyngeal synovial sarcoma
Authors: Paolino Gaetano , Girolami Ilaria , Bernasconi Riccardo , Beccari Serena , Marchioni Daniele , Molteni Gabriele , De Robertis Riccardo , Ghimenton Claudio , Caliò Anna , Brunelli Matteo , Eccher Albino 
Published: July 2019

AbstractSynovial sarcoma arising in the pharynx is a rare entity, with very few cases described in literature, mainly as surgical‐oriented case reports. We report the case of a healthy 20‐year old man who presented with a painless right neck mass, clinically suspicious for a thyroid nodule. Ultrasound scan and fine‐needle aspiration cytology failed to provide a definitive result, although suggesting a mesenchymal proliferation, in accordance with magnetic resonance imaging findings. Therefore, the lesion was removed with a minimally invasive surgical intervention. Definitive histologic and immunohistochemical examination of the surgical specimen revealed a biphasic synovial sarcoma, further validated by the detection of SS18 gene rearrangement on fluorescent in‐situ hybridization examination. Although rarely, synovial sarcoma may arise in the pharynx. Radiological, cytological, histological and molecular findings are needed along each step of the diagnostic process.
Parasite infections in a social carnivore: Evidence of their fitness consequences and factors modulating infection load
Authors: Ferreira Susana Carolina Martins , Hofer Heribert , Madeira de Carvalho Luis , East Marion L. 
Published: July 2019

AbstractThere are substantial individual differences in parasite composition and infection load in wildlife populations. Few studies have investigated the factors shaping this heterogeneity in large wild mammals or the impact of parasite infections on Darwinian fitness, particularly in juveniles. A host's parasite composition and infection load can be shaped by factors that determine contact with infective parasite stages and those that determine the host's resistance to infection, such as abiotic and social environmental factors, and age. Host–parasite interactions and synergies between coinfecting parasites may also be important. We test predictions derived from these different processes to investigate factors shaping infection loads (fecal egg/oocyte load) of two energetically costly gastrointestinal parasites: the hookworm Ancylostoma and the intracellular Cystoisospora, in juvenile spotted hyenas (Crocuta crocuta) in the Serengeti National Park, in Tanzania. We also assess whether parasite infections curtail survival to adulthood and longevity. Ancylostoma and Cystoisospora infection loads declined as the number of adult clan members increased, a result consistent with an encounter‐reduction effect whereby adults reduced encounters between juveniles and infective larvae, but were not affected by the number of juveniles in a clan. Infection loads decreased with age, possibly because active immune responses to infection improved with age. Differences in parasite load between clans possibly indicate variation in abiotic environmental factors between clan den sites. The survival of juveniles (<365 days old) to adulthood decreased with Ancylostoma load, increased with age, and was modulated by maternal social status. High‐ranking individuals with low Ancylostoma loads had a higher survivorship during the first 4 years of life than high‐ranking individuals with high Ancylostoma loads. These findings suggest that high infection loads with energetically costly parasites such as hookworms during early life can have negative fitness consequences.
Community regulation models as a framework for direct and indirect effects of climate change on species distributions
Authors: Wallingford Piper D. , Sorte Cascade J. B. 
Published: July 2019

AbstractExisting projections of climate change impacts focus primarily on direct abiotic impacts on individuals and populations. However, these models often ignore species interactions, which are vital for determining community composition and structure. To evaluate both direct and indirect effects of climate change on species distributions, we applied the Menge–Sutherland model, which describes the relative role of predation and environmental stress in regulating community structure. Using a space‐for‐time approach, we tested the predictions that (1) predators are more strongly impacted by increasing environmental stress than prey (as described in the Menge–Sutherland model) and (2) incorporating indirect (predator) effects increases our ability to predict impacts of increased temperature on prey distributions. We surveyed vertical distributions of predators (sea stars) and a foundational prey species (mussels) at 20 intertidal sites spanning a thermal gradient along the West Coast of the United States. Using generalized linear models and structural equation models, we found that as temperature increased, the upper limits of foundational prey species decreased (a direct effect), while prey lower limits also shifted downward, due to an indirect effect of temperature on predator distributions. Under future climate change, mussel ranges may undergo vertical shifts toward subtidal habitats, allowing for localized persistence of mussels and associated species. Our model comparisons indicate that this framework—incorporating both direct and indirect environmental stress effects within a classic community regulation model—can improve prediction of responses to warming. Community regulation models could be expanded to inform management and conservation efforts during unprecedented climate and ecological change.
Differential impacts of soil microbes on native and co‐occurring invasive tree species
Authors: Wróbel Aleksandra , Crone Elizabeth E. , Zwolak Rafał 
Published: July 2019

AbstractThe Janzen‐Connell effect is often generated by interactions between trees and soil microbes while the enemy release hypothesis states that invasive species are released from regulation by natural enemies. Thus, the strength of the Janzen‐Connell effect could differ between native vs. nonnative plants. We tested this hypothesis with congeneric pairs of invasive and native tree species in Europe: boxelder (Acer negundo) vs. Norway maple (A. platanoides), and Northern red oak (Quercus rubra) vs. pedunculate oak (Q. robur). We conducted greenhouse experiments using soil sterilization treatments, field experiments on distance‐dependent germination, and field surveys of early life stages of the focal species. Greenhouse and field experiments demonstrated patterns consistent with Janzen‐Connell effect that is most likely caused by negative distance dependence in seed germination and stem growth which was found in both genera of the native, but not the invasive trees. Soil sterilization experiments suggested that these effects are driven by interactions with soil biota. Field surveys revealed the Janzen‐Connell pattern in the distribution of seedlings and saplings of the native, but not the invasive Acer species. Our findings indicate that weakened Janzen‐Connell effect might contribute to successful invasions of certain nonnative plant species.
Electric vehicle integration into power systems
Authors: Ota Yutaka 
Published: July 2019

AbstractSales of electric vehicle are rapidly growing worldwide. Vehicle grid integration is important for mitigating impact of charging demand on the distribution feeders, realizing renewable powered charging from the rooftop photovoltaic and wind power generation, and contributing to the Vehicle‐to‐Grid ancillary services for the power systems. This article reviews current trends of the vehicle grid integration R&D. Future prospective is also pointed out on the key issues such as an electrical interface, multiple services integration, and the electric vehicle living demonstration for open innovation.
“I think you understand me.” Studying the associations between actual, assumed, and perceived understanding within couples
Authors: Hinnekens Céline , Stas Lara , Gistelinck Fien , Verhofstadt Lesley L. 
Published: July 2019

AbstractThe current study examined the associations between actual, assumed, and perceived understanding and partners’ levels of dyadic adjustment. One hundred fifty‐two couples provided questionnaire data (assumed and perceived understanding), participated in a videotaped conflict interaction, and in a video‐review task to assess actual understanding (empathic accuracy). The data were analyzed by means of the Actor‐Partner Interdependence Model. The results suggest that (a) some aspects of how well someone assumes that (s)he has understood the partner during a preceding conflict interaction were positively associated with his/her own objective level of understanding (actor effect), (b) that someone's perception of how understood (s)he feels was not associated with the partner's objective level of understanding (partner effect), and (c) perceived understanding, but not actual understanding, was positively associated with dyadic adjustment.
Flower‐like Ni(II)‐based Metal‐organic Framework‐decorated Ag Nanoparticles: Fabrication, Characterization and Electrochemical Detection of Glucose
Authors: Peng Xuerong , Wan Yue , Wang Yanying , Liu Tao , Zou Ping , Wang Xianxiang , Zhao Qingbiao , Ding Fang , Rao Hanbing 
Published: July 2019

AbstractGlucose concentration monitoring is important for the prevention, diagnosis and treatment of diabetes. In this work, a composite material of AgNPs/MOF‐74(Ni) was prepared for electrochemical determination of glucose. AgNPs/MOF‐74(Ni) was characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X‐ray photoelectron spectroscopy (XPS). The electrochemical properties of the glassy carbon electrodes modified with the AgNPs/MOF‐74(Ni) composites were characterized by cyclic voltammetry (CV) and current‐time curve (I‐t curve) with three electrode system. The determination of glucose with the electrode modified by AgNPs/MOF‐74(Ni) has a linear range of 0.01∼4 mM with the correlation coefficient (R2) of 0.994. The detection limit is 4.7 μM (S/N=3) and the sensitivity is 1.29 mA ⋅ mM−1 ⋅ cm−2. In addition, this sensing system possesses reasonable reproducibility and stability. The good performance of electrochemical determination for glucose is attributed to the concerted effect of silver nanoparticles and MOF‐74(Ni) on the promotion of glucose oxidation
Comparative analysis of the full set of methylated β‐cyclodextrins as chiral selectors in capillary electrophoresis
Authors: Varga Erzsébet , Benkovics Gábor , Darcsi András , Várnai Bianka , Sohajda Tamás , Malanga Milo , Béni Szabolcs 
Published: July 2019

AbstractThe chiral separation ability of the full library of methylated‐β‐cyclodextrins towards pharmacologically significant racemic drugs including basic compounds was studied by chiral CE. The syntheses of all the methylated, single isomer β‐cyclodextrins were revised and optimized and the aqueous solubility of the derivatives was unambiguously established. The three most relevant commercially available methylated isomeric mixtures were also included in the screening, so a total of ten various methylated CDs were investigated. The effects of the selector concentration on the enantiorecognition properties at acidic pH were investigated. Among the dimethylated β‐cyclodextrins, the heptakis (2,6‐di‐O‐methyl)‐β‐cyclodextrin isomer (2,6‐DIMEB) resulted to be the most versatile chiral selector. Terbutaline was selected as a model compound for the in‐depth investigation of host‐guest enantiodiscrimination ability. The association constants between the two terbutaline enantiomers and 2,6‐DIMEB were determined in order to support that the enantioseparation is driven by differences is host‐guest binding. The migration order of the enantiomers was confirmed by performing spiking experiments with the pure enantiomers. 1D and 2D NMR spectroscopy was applied to the 2,3‐, and 2,6‐DIMEB/terbutaline systems to rationalize at molecular level the different enantioseparation ability of the dimethylated β‐cyclodextrin selectors.
A fluid‐solid coupling method for the simulation of gas transport in porous coal and rock media
Authors: Zhang Cun , Liu Jinbao , Zhao Yixin , Zhang Lei , Guo Junting 
Published: July 2019

AbstractUnderstanding coal and rock permeability, and the corresponding influence on stress, is important in the field of energy development. In applied engineering, there is a tendency to employ three‐dimensional methods that are simpler, less time‐ and cost‐expensive, less computationally expensive, and larger scale. Thus, a numerical simulation fluid‐solid coupling method is proposed in this paper. The proposed numerical simulation method utilizes the stress‐permeability test results for elastic and plastic coal samples. The permeability models of the elastic and plastic coal samples under loading and unloading were obtained by fitting the experimental results and embedded them into FLAC3D software by using FISH language. The results of the uniaxial and triaxial flow simulations are consistent with the experimental results, thereby confirming the accuracy and feasibility of the numerical method proposed in this paper. This allows the permeability of the numerical reservoir model to be continuously updated according to the current stress level in the production process.
Comparative Study of Experimental and Theoretical Evaluation of Nocturnal Cooling System for Room Cooling for Clear and Cloudy Sky Climate
Authors: Mulik Pramod V. , Kapale Uday C. , Kamble Gautam S. 
Published: July 2019

AbstractNocturnal radiation is one of the effective passive cooling technologies by infrared radiation exchange between earthly surfaces and the sky. Heating ventilation and air conditioning (HVAC) systems are highly energy‐demanding and there is a need to develop alternative low‐energy means to achieve comfort. Radiative cooling reduces the electricity requirements, which normally is generated through fossil fuels, in order to run active cooling systems. During the day, this is offset by solar radiation gains on the roof; however, at night, this heat loss has the ability to cool air, as roofs can experience a temperature drop of 2–12 °C below ambient. The experimental investigation of the aluminum material and their surface colors on nocturnal cooling is presented for clear and cloudy sky conditions. The material of aluminum and black color coating are considered. Results obtained reveal that the plates' performances greatly depend on the presence of clouds in the night. The best results are obtained in a clear sky summer climate condition than in the cloudy sky condition. The net cooling rate of night sky radiation system for without and with coating on aluminum of mass flow rate 0.05 kg s−1 is near about 72.30–80.99 W m−2 for clear sky and 48.75–53.25 W m−2 for cloudy sky condition.