bluuebunny/crossref_metadata_2025_split huggingface dataset:
Finite‐time dissipativity‐based filter design for networked control systems
Authors: Mathiyalagan K. , Balasubramani M. , Chang Xiao‐Heng , Sangeetha G. 
Published: October 2019

SummaryThis paper investigates the problem of finite‐time boundedness and dissipativity‐based filter design for networked control systems together with parameter uncertainties and random packet dropouts. The packet transmission information is defined by using Bernoulli distributed white sequence which characterizes the measurement conditions. Some new sufficient conditions are established to ensure that the filtering error system is stochastically finite‐time bounded and strictly
finite‐time dissipative. These sufficient conditions to design the filter parameters are derived by using linear matrix inequalities and reciprocally convex approach. Finally, an example is given to validate the effectiveness of the proposed filter design.
Two‐Photon Up‐Conversion Photoluminescence Realized through Spatially Extended Gap States in Quasi‐2D Perovskite Films
Authors: Zhu Xixiang , Xu Hengxing , Liu Yongtao , Zhang Jia , Wang Miaosheng , Ivanov Ilia N. , Ovchinnikova Olga S. , Hu Bin 
Published: October 2019

AbstractA new approach to generate a two‐photon up‐conversion photoluminescence (PL) by directly exciting the gap states with continuous‐wave (CW) infrared photoexcitation in solution‐processing quasi‐2D perovskite films [(PEA)2(MA)4Pb5Br16 with n = 5] is reported. Specifically, a visible PL peaked at 520 nm is observed with the quadratic power dependence by exciting the gap states with CW 980 nm laser excitation, indicating a two‐photon up‐conversion PL occurring in quasi‐2D perovskite films. Decreasing the gap states by reducing the n value leads to a dramatic decrease in the two‐photon up‐conversion PL signal. This confirms that the gap states are indeed responsible for generating the two‐photon up‐conversion PL in quasi‐2D perovskites. Furthermore, mechanical scratching indicates that the different‐n‐value nanoplates are essentially uniformly formed in the quasi‐2D perovskite films toward generating multi‐photon up‐conversion light emission. More importantly, the two‐photon up‐conversion PL is found to be sensitive to an external magnetic field, indicating that the gap states are essentially formed as spatially extended states ready for multi‐photon excitation. Polarization‐dependent up‐conversion PL studies reveal that the gap states experience the orbit–orbit interaction through Coulomb polarization to form spatially extended states toward developing multi‐photon up‐conversion light emission in quasi‐2D perovskites.
Copper(II)‐catalyzed Domino Reaction of the Acyclic Ketene‐(S,S)‐Acetals with Diazo Compounds: Convenient Synthesis of Poly‐substituted Thiophenes
Authors: Sun Ran , Du Yang , Tian Cui , Li Lei , Wang He , Zhao Yu‐Long 
Published: October 2019

AbstractCopper(II)‐catalyzed domino reaction between the acyclic ketene‐(S,S)‐acetals and diazo compounds has been successfully developed. This reaction proceeds through a sequential formation of electrophilic copper carbenoid, sulfur ylide and subsequent C−S bond coupling and cleavage. Notably, the domino reaction features broad the readily available acyclic ketene‐(S,S)‐acetals scope and provides a new strategy for the synthesis of poly‐substituted thiophenes.magnified image
Whistle variability of the Mediterranean short beak common dolphin
Authors: Azzolin Marta , Gannier Alexandre , Papale Elena , Buscaino Giuseppa , Mussi Barbara , Ardizzone Giandomenico , Giacoma Cristina , Pace Daniela Silvia 
Published: October 2019

Abstract

The short‐beaked common dolphin is a highly vocal species, with a wide distribution in all oceans, including the Mediterranean and the Black Seas. In the Mediterranean Sea, the short‐beaked common dolphin inhabits both pelagic and neritic waters.
Osteological collections and the literature show that short‐beaked common dolphins were widespread and abundant in much of the Mediterranean Sea until the late 1960s. During recent decades the species has declined in the whole basin, and, in 2003, it was listed as Endangered in the IUCN Red List.
Genetic studies strongly suggest that the Mediterranean and the Eastern North Atlantic populations are isolated from each other. Genetic differentiation within the Mediterranean Sea, between the Eastern Mediterranean (Ionian Sea) and Western Mediterranean populations, is also reported.
The aim of this study was to investigate the geographical variation in the characteristics of whistles of free‐ranging short‐beaked common dolphins living in the Mediterranean Sea, and to evaluate if whistle acoustic structure is the result of adaptation to local environment characteristics or of a possible genetic diversification.
Recordings were collected from 1994 to 2012 throughout the basin, employing multiple platforms. Twenty‐six independent acoustic detections were made, and 704 whistles were extracted and considered for statistical analysis.
Whistle analysis enabled the identification of distinct geographical units of short‐beaked common dolphin within the Mediterranean Sea. Genetic isolation is probably the major cause of the geographic variance of the Mediterranean short‐beaked common dolphin whistle structure, which may reflect some evolutionary adaptations to particular ecological conditions or may be the by‐product of morphological evolution.
The results of the present study show that intra‐Mediterranean variability of whistle structure reflects the path of genetic studies, highlighting the possible use of acoustic data in combination with other sources of data (genetic, morphological, etc.) to identify geographic areas where discrete management units occur.
Discrepancies between parent and child ratings of anxiety in children with autism spectrum disorder
Authors: Kalvin Carla B. , Marsh Carolyn L. , Ibrahim Karim , Gladstone Theresa R. , Woodward Diana , Grantz Heidi , Ventola Pamela , Sukhodolsky Denis G. 
Published: October 2019

Co‐occurring anxiety is common in children with autism spectrum disorder (ASD). However, inconsistencies across parent and child reports of anxiety may complicate the assessment of anxiety in this population. The present study examined parent and child anxiety ratings in children with ASD with and without anxiety disorders and tested the association between parent–child anxiety rating discrepancy and ASD symptom severity. Participants included children aged 8–16 years in three diagnostic groups: ASD with co‐occurring anxiety disorders (ASD + Anxiety; n = 34), ASD without co‐occurring anxiety disorders (ASD; n = 18), and typically developing healthy controls (TD; n = 50). Parents and children completed ratings of child anxiety using the Multidimensional Anxiety Rating Scale. Patterns of parent and child anxiety ratings differed among the three groups, with parent ratings exceeding child ratings only in the ASD + Anxiety group. Parents reported higher levels of child anxiety in the ASD + Anxiety versus ASD group, whereas children reported comparable levels of anxiety in the two groups. Among children with ASD, ASD symptom severity was positively associated with the degree to which parent ratings exceeded child ratings. Results suggest that children with ASD and co‐occurring anxiety disorders endorse some anxiety symptoms but may underreport overall levels of anxiety. In addition, ASD symptom severity might increase discrepancies in parent–child anxiety ratings. These findings suggest a unique and valuable role of child anxiety ratings and suggest that both parent and child anxiety ratings should be considered in light of children's ASD symptom severity and used to guide further assessment. Autism Res 2020, 13: 93–103. © 2019 International Society for Autism Research, Wiley Periodicals, Inc.Lay SummaryChildren with autism spectrum disorder (ASD) commonly experience anxiety; yet, their perceptions of their anxiety might differ from their parents' perceptions. This study found that, while children with ASD and anxiety disorders acknowledge some anxiety, their parents report them as having higher levels of anxiety. Also, child and parent perceptions of anxiety may differ more for children with more severe ASD symptoms. How these findings may guide research and clinical practice is discussed.
Thalidomide for the treatment of angiodysplasia‐related recurrent gastrointestinal hemorrhage: Is low dose a safe and viable option?
Authors: Patel Harish , Mehershahi Shehriyar , Shaikh Danial Haris , Makker Jasbir , Nayudu Sureshkumar , Remy Prospere , Chilimuri Sridhar 
Published: October 2019

AbstractThalidomide is often used for the management of refractory gastrointestinal angiodysplasia (GIAD). The tolerance, toxic profile, and compliance of thalidomide are dose‐dependent. The low‐dose thalidomide (50 mg) is safe and a viable option for bleeding related to GIAD.
Impact of Al Activators on Structure and Catalytic Performance of Cr Catalysts in Homogeneous Ethylene Oligomerization – A Multitechnique in situ/operando Study
Authors: Grauke Reni , Schepper Rahel , Rabeah Jabor , Schoch Roland , Bentrup Ursula , Bauer Matthias , Brückner Angelika 
Published: October 2019

AbstractThe effect of different AlR3 activators (R=methyl, ethyl, isobutyl, n‐octyl) has been studied in comparison to modified methylaluminoxane (MMAO) by operando EPR as well as by in situ UV‐vis, ATR‐IR and XANES/EXAFS spectroscopy during oligomerization of ethylene at 20 bar and 40 °C with a homogeneous Cr complex catalyst formed in situ upon mixing a Cr(acac)3 precursor, a Ph2PN(iPr)PPh2 ligand (PNP) and the activator. Coordination of PNP to Cr(acac)3 is initiated only in the presence of an activator. Highest 1‐octene productivity (detected during operando EPR measurements) was obtained with MMAO which promotes bidentate coordination of the ligand to form an active (PNP)CrII(CH3)2 chelate complex. Rising bulkiness of R in AlR3 leads to only monodentate coordination of PNP to the Cr center by one P atom and increasing reduction to CrI to a maximum extend of around 30 % for AlOct3. This lowers the catalytic performance, which is mainly governed by the mode of PNP coordination rather than by the CrI content.
Air‐Stable Hexagonal Bipyramidal Dysprosium(III) Single‐Ion Magnets with Nearly Perfect D6h Local Symmetry
Authors: Li Zi‐Han , Zhai Yuan‐Qi , Chen Wei‐Peng , Ding You‐Song , Zheng Yan‐Zhen 
Published: October 2019

AbstractEight‐coordinated DyIII centres with D6h symmetry are expected to act as high‐performance single‐molecule magnets (SMMs) due to the simultaneous fulfilment of magnetic axiality and a high coordination number (a requisite for air stability). But the experimental realization is challenging due to the requirement of six coordinating atoms in the equatorial plane of the hexagonal bipyramid; this is usually too crowded for the central DyIII ion. Here a hexaaza macrocyclic Schiff base ligand and finetuned axial alkoxide/phenol‐type ligands are used to show that a family of hexagonal bipyramidal DyIII complexes can be isolated. Among them, three complexes possess nearly perfect D6h local symmetry. The highest effective magnetic reversal barrier is found at 1338(3) K and an open hysteresis temperature of 6 K at the field sweeping rate of 1.2 mT s−1; this represents a new record for D6h SMMs.
Dual‐Stimuli Responsive 2D Supramolecular Organic Framework for the Detection of Azoreductase Activity
Authors: Zhang Hao , Liang Feng , Yang Ying‐Wei 
Published: October 2019

AbstractA 2D supramolecular organic framework (SOF) based on synthetic macrocycles has been constructed in water by a self‐assembly strategy. Two new organic monomers of this SOF, possessing viologen and azobenzene functional groups, form a stimuli‐responsive host–guest system upon cooperatively binding with cucurbit[8]uril rings. The reversible formation and dissociation of 2D SOF can be realized by the isomerization of azobenzene under ultraviolet and visible light. The light‐responsive property of the SOF is highly reversible and stable for up to four cycles. Moreover, azoreductase produced by Escherichia coli can reduce the N=N double bond of azobenzene entities, resulting in fluorescence recovery of the system. As an excellent and effective fluorescent probe, the SOF can detect azoreductase activity for real‐time monitoring of the growth process of Escherichia coli. The dual‐stimuli responsive 2D SOF is envisioned to drive the development of responsive devices with complex functions.
Growth and Properties of Intentionally Carbon‐Doped GaN Layers
Authors: Richter Eberhard , Beyer Franziska C. , Zimmermann Friederike , Gärtner Günter , Irmscher Klaus , Gamov Ivan , Heitmann Johannes , Weyers Markus , Tränkle Günther 
Published: October 2019

AbstractCarbon‐doping of GaN layers with thickness in the mm‐range is performed by hydride vapor phase epitaxy. Characterization by optical and electrical measurements reveals semi‐insulating behavior with a maximum of specific resistivity of 2 × 1010 Ω cm at room temperature found for a carbon concentration of 8.8 × 1018 cm−3. For higher carbon levels up to 3.5 × 1019 cm−3, a slight increase of the conductivity is observed and related to self‐compensation and passivation of the acceptor. The acceptor can be identified as CN with an electrical activation energy of 0.94 eV and partial passivation by interstitial hydrogen. In addition, two differently oriented tri‐carbon defects, CN‐a‐CGa‐a‐CN and CN‐a‐CGa‐c‐CN, are identified which probably compensate about two‐thirds of the carbon which is incorporated in excess of 2 × 1018 cm−3.
Ion‐Enhanced Conversion of CO2 into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability
Authors: Piao Guangxia , Yoon Sun Hee , Han Dong Suk , Park Hyunwoong 
Published: October 2019

AbstractFacile synthesis of efficient electrocatalysts that can selectively convert CO2 to value‐added chemicals remains a challenge. Herein, the electrochemical synthesis of porous Bi dendrite electrodes and details of their activity toward CO2 conversion to formate in aqueous solutions of bicarbonate are presented. The as‐synthesized multilayered, porous, dendritic Bi electrodes exhibit a faradaic efficiency (FE) of approximately 100 % for formate production. Added halides and cations significantly influence the steady‐state partial current density for formate production JFM (Cl−>Br−≈I−; Cs+>K+>Li+). DFT calculations revealed that the reaction pathway involving the species *OCOH occurs predominantly and the presence of both Cs+ and Cl− makes the overall reaction more spontaneous. Photovoltaic‐cell‐assisted electrocatalysis produced formate with an FE of approximately 95 % (JFM≈10 mA cm−2) at an overall solar conversion efficiency of approximately 8.5 %. The Bi electrodes maintain their activity for 360 h without a change in the surface states.
Potential differences in seed dispersals of low‐height vegetation between single element and windbreak‐like clumps
Authors: Fu Lin‐Tao 
Published: October 2019

AbstractWind speed is one of the most important factors for seed wind dispersal. A wind speed reduction region, which could be influenced by vegetation arrangement, will form in the lee of vegetation and therefore affects the seed dispersal. Here, by taking shrub as an example, quantitative differences in seed dispersals of low vegetation between single element and windbreak‐like clumps are numerically investigated. The local variation of stream‐wise wind speed is focused. Empirically parameterized functions of leeward wind distributions are employed. It reveals that the accumulative probability of dispersed seeds from a point source with considering leeward wind reduction could be well fitted by a logistic function. For a fixed release height or vegetation porosity, accumulative probabilities for single element and those for windbreak‐like clumps would intersect at a leeward location. This intersection location decreases linearly with release height but exponentially with porosity. The fitting parameter r0 (the center of logistic function) for single element increases as the same manner for windbreak‐like clumps, with regard to the increase of release height, porosity, and height. But, the increasing rates for single element are higher than those for windbreak‐like clumps. The fitting parameter p (the power index of logistic function) for single element is generally larger than that for windbreak‐like clumps. With the increase of release height, p decreases at first but increases then for single element, while it shows opposite trend for windbreak‐like clumps. p decreases with porosity for both single element and windbreak‐like clumps. But, the decreasing rate for single element is lower than that for windbreak‐like clumps. p increases exponentially with height for windbreak‐like clumps, while it almost keeps constant for single element. These results suggest the potential importance of vegetation arrangement on seed dispersal and therefore possibly provide additional reason for the disagreement among observed dispersal kernels.
Connecting endoplasmic reticulum and oxidative stress to retinal degeneration, TBI, and traumatic optic neuropathy
Authors: Cansler Shelby M. , Evanson Nathan K. 
Published: October 2019

AbstractTraumatic optic neuropathy (TON) is commonly associated with head trauma, and thus is a known comorbidity of traumatic brain injury (TBI). TON has not received much attention in basic research despite being associated with permanent vision loss, color blindness, and loss of visual fields. This mini‐review discusses the importance of studying TON in the context of TBI and mechanisms that may be involved in the ongoing optic nerve degeneration of TON. We focus particularly on endoplasmic reticulum (ER) and redox stress processes because of the overlapping presence of these degenerative mechanisms in both TBI and various retinopathies, even though these stress pathways have not yet been used to explain retinal degeneration in a model of TON. We propose that future research is needed to uncover whether ER and redox stress function independently or whether one precedes the other. This understanding is necessary in order to understand the time frames of potential treatment and the prognosis of ongoing secondary effects of TBI including optic nerve injury.
Recent Advances and Future Prospects on Adaptive Biomaterials for Antimicrobial Applications
Authors: Su Linzhu , Li Yuanfeng , Liu Yong , An Yingli , Shi Linqi 
Published: October 2019

AbstractBacterial infection is becoming the biggest threat to human health. The scenario is partly due to the ineffectiveness of the conventional antibiotic treatments against the emergence of multidrug‐resistant bacteria and partly due to the bacteria living in biofilms or cells. Adaptive biomaterials can change their physicochemical properties in the microenvironment of bacterial infection, thereby facilitating either their interactions with bacteria or drug release. The trends in treating bacterial infections using adaptive biomaterials‐based systems are flourishing and generate innumerous possibility to design novel antimicrobial therapeutics. This feature article aims to summarize the recent developments in the formulations, mechanisms, and advances of adaptive materials in bacterial infection diagnosis, contact killing of bacteria, and antimicrobial drug delivery. Also, the challenges and limitations of current antimicrobial treatments based on adaptive materials and their clinical and industrial future prospects are discussed.
Ulam‐type stability for differential equations driven by measures
Authors: Satco Bianca‐Renata 
Published: October 2019

AbstractBased on a notion of Stieltjes derivative of a function with respect to another function, we provide Ulam–Hyers type stability results for nonlinear differential equations driven by measures on compact or on unbounded intervals, in the lack of Lipschitz continuity assumptions. In particular, one can deduce stability results for generalized differential equations, dynamic equations on time scales or impulsive differential equations (including the case of an infinite number of impulses that accumulate in the considered interval, thus allowing the study of Zeno hybrid systems).
Hydrogen sulfide‐mediated resistance against water avoidance stress‐induced gastritis by maintenance of gastric microbial homeostasis
Authors: Han Yingnan , Li Ya , Hu Zhekai , Wang Xiao , Liu Junze , Ren Xue , Yu Yanbo , Li Yan , Li Wenjuan , Sun Yundong 
Published: October 2019

AbstractChronic persistent stress is an important cause of gastritis, but the underlying mechanism remains to be further researched, especially the role of the gastric microbiota in this process. Here, we used the water avoidance stress (WAS) test in mouse models for chronic stress‐induced gastritis to investigate the underlying mechanisms of this disease. The effect of stress on the gastric microbiota was analyzed based on 16S rRNA sequencing; the changes in hydrogen sulfide (H2S) and inflammatory cytokine levels in gastric tissues were detected by Western blotting, ELISA, immunofluorescence, and qRT‐PCR. Hematoxylin and eosin staining was used as an indicator of the gastritis histological score. This finding is consistent with previous studies showing that gastric H2S is negatively associated with the inflammatory index and might protect the gastrointestinal tract from inflammation. WAS‐induced gastritis was associated with a reduction in H2S release, which appeared to affect the homeostasis of the gastric microbiota of mice. Inflammation and microbial dysbiosis were partially reversed by sodium hydrosulfide (NaHS) and vitamin B6 (VB6) supplementation, suggesting the therapeutic potential of VB6 supplementation for the treatment of stress‐induced gastritis. Gastritis has a serious impact on health and quality of life. An increasing number of people are suffering from chronic gastritis linked to a high‐stress lifestyle, and our research provides clues for the prevention and treatment of stress‐induced gastritis.
Observed and model‐simulated thermodynamic processes associated with urban heavy rainfall events over Bangalore, India
Authors: Ajilesh P. , Rakesh V. , Sahoo Sanjeeb K. , Himesh S. 
Published: October 2019

AbstractA total of 32 rainfall events spanning the period from 2012 to 2014 over the urban Indian city of Bangalore were simulated using the Weather Research and Forecast (WRF) model. Model simulations were carried out with a four‐nested domain initialized with Global Forecast System (GFS) data and the forecast was generated on an hourly basis. The forecasted rainfall at hobli level (Bangalore has 34 hobli divisions with an area of each hobli of the order of about 10 km2) was evaluated in terms of its intensity and pattern of spatial distribution by comparing it with corresponding rain‐gauge observations. Also, the rainfall forecast skill of the model was evaluated statistically by computing root mean square error, bias and mean absolute error. Thermodynamic variables such as equivalent potential temperature, convective available potential energy (CAPE), convective inhibition (CIN), K index (KI), lifted index (LI) and total totals index (TTI) were also derived from the simulated model parameters for all the events and then verified against corresponding observations. The results showed that the WRF model could simulate the rainfall events and associated thermodynamic features qualitatively; however, there were few hoblis where the relative errors in the forecast were > 100%. The forecast errors were relatively lower for cases during the southwest monsoon season compared with other seasons. It was found that the model underestimated thermodynamic indices such as CAPE, dew point depression and the simulated LI were positive; these were indicative of the model's limitation in simulating intense convection and a possible reason for underpredicted rainfall simulations.