bluuebunny/crossref_metadata_2025_split huggingface dataset:
Robust distributed control within a curve virtual tube for a robotic swarm under self‐localization drift and precise relative navigation
Authors: Gao Yan , Bai Chenggang , Quan Quan 
Published: July 2023

AbstractTo guide the movement of a robotic swarm in a corridor‐like environment, a curve virtual tube with no obstacle inside was designed in our previous work. This article generalizes the controller design to the condition that all robots have self‐localization drifts and precise relative navigation, where the flocking algorithm is introduced to reduce the negative impact of the self‐localization drift. Similar to the “many wrongs principle,” it is shown that the cohesion behavior and the velocity alignment behavior are able to reduce the influence of the position measurement drift and the velocity measurement error, respectively. For convenience in practical use, a modified vector field controller with five control terms is put forward. Finally, the effectiveness of the proposed method is validated by numerical simulations and real experiments.
Invasion in the Niger Delta: remote sensing of mangrove conversion to invasive Nypa fruticans from 2015 to 2020
Authors: Barenblitt Abigail , Fatoyinbo Lola , Thomas Nathan , Stovall Atticus , de Sousa Celio , Nwobi Chukwuebuka , Duncanson Laura 
Published: July 2023

AbstractInvasive species are a leading threat to biodiversity worldwide. Nypa palm (Nypa fruticans) has emerged as the predominant invasive species in the Niger Delta region of Nigeria. While endemic mangroves have high rates of carbon sequestration, stabilize coastlines and protect biodiversity, Nypa does not provide these services outside its native region of Southeast Asia. Oil exploration and urbanization in this region also exacerbate mangrove loss and Nypa spread. As Nypa is difficult to distinguish from endemic mangrove species in remotely sensed data, estimates of mangrove and ecosystem services losses in Nigeria are highly uncertain. Here, we analyse multisensor satellite data with machine learning to quantify the rapid expansion of Nypa from 2015 to 2020 in Nigeria. Using Landsat imagery and random forest classification, we quantify total potential Nypa extent in Nigeria in 2019. We then produced a Nypa extent map using iterative combinations of Sentinel‐1 SAR, Sentinel‐2 MSI and ALOS PALSAR. Random forest classifications using SAR data from ALOS and Sentinel‐1 were best suited for mapping Nypa extent with similar accuracies (78% and 75%, respectively). Based on data availability and accuracy, we focussed our change analysis on Sentinel‐1 SAR. Our results show ~28 000 ha of mangroves were converted to Nypa in Nigeria by 2020 and covered a larger extent than endemic mangroves, compounding the effect of the existing degradation and deforestation in the region. We also compared forest height and complexity estimates from Global Ecosystem Dynamics Investigation LiDAR to further distinguish between endemic mangroves and Nypa in three dimensions. Nypa structural variability, measured by top‐of‐canopy height, vegetation cover, plant area index, and foliage height diversity, was lower than that of mangroves. At current rates of Nypa expansion, the entire area of study would be invaded by Nypa by 2028, with potentially detrimental consequences to the ecosystem services provided by mangroves.
Removal of Molybdate Ions in Water on a Newly Synthesized Imidazolium‐based Poly (ionic liquid)
Authors: Zhao Yangui , Zhang Yao , Ji Jianming , Yang Ying 
Published: July 2023

AbstractThe natural biological water system has been seriously damaged due to the discharge of wastewater containing too much molybdenum, endangering the life and health of animals and plants. Imidazolium‐based poly (ionic liquid) was synthesized by grafting copolymers of styrene and 1‐(chloromethyl)‐4‐vinylbenzene into N‐methylimidazole, N‐ethylimidazole and N‐propyl imidazole, followed by characterization with the use of nuclear magnetic resonance spectrometer and Fourier transform infrared spectrometer. How the Imidazolium‐based poly (ionic liquid) could recover MoO42− from sewage was investigated. The pH, reaction temperature, reaction duration, adsorbent dose, and interfering ions were all tuned for MoO42− adsorption conditions. Nitric acid can regenerate the Imidazolium‐based poly (ionic liquid) loaded with MoO42−. Both the adsorption kinetics and the adsorption isotherm exhibit good agreement with the quasi second‐order kinetic model and the Langmuir isotherm model, respectively.Imidazolium‐based poly (ionic liquid) have a special reusability when compared to polyaniline‐modified bentonite, iron‐based nanomaterials, and γ‐Fe2O3 nanomaterials. The results reveal that Imidazolium‐based poly (ionic liquid) has a strong recovery effect on trace molybdenum from wastewater, which makes it an effective adsorbent with industrial application value.
Molecular Architecture Effects on Bulk Nanostructure in Bis(Orthoborate) Ionic Liquids
Authors: Hammond Oliver S. , Bousrez Guillaume , Mehler Filip , Li Sichao , Shimpi Manishkumar R. , Doutch James , Cavalcanti Leide , Glavatskih Sergei , Antzutkin Oleg N. , Rutland Mark W. , Mudring Anja‐Verena 
Published: July 2023

AbstractA series of 19 ionic liquids (ILs) based on phosphonium and imidazolium cations of varying alkyl‐chain lengths with the orthoborate anions bis(oxalato)borate [BOB]−, bis(mandelato)borate, [BMB]− and bis(salicylato)borate, [BScB]−, are synthesized and studied using small‐angle neutron scattering (SANS). All measured systems display nanostructuring, with 1‐methyl‐3‐n‐alkyl imidazolium‐orthoborates forming clearly bicontinuous L3 spongelike phases when the alkyl chains are longer than C6 (hexyl). L3 phases are fitted using the Teubner and Strey model, and diffusely‐nanostructured systems are primarily fitted using the Ornstein‐Zernicke correlation length model. Strongly‐nanostructured systems have a strong dependence on the cation, with molecular architecture variation explored to determine the driving forces for self‐assembly. The ability to form well‐defined complex phases is effectively extinguished in several ways: methylation of the most acidic imidazolium ring proton, replacing the imidazolium 3‐methyl group with a longer hydrocarbon chain, substitution of [BOB]− by [BMB]−, or exchanging the imidazolium for phosphonium systems, irrespective of phosphonium architecture. The results suggest there is only a small window of opportunity, in terms of molecular amphiphilicity and cation:anion volume matching, for the formation of stable extensive bicontinuous domains in pure bulk orthoborate‐based ILs. Particularly important for self‐assembly processes appear to be the ability to form H‐bonding networks, which offer additional versatility in imidazolium systems.
Aligned Dipoles Induced Electric‐Field Promoting Zinc‐Ion De‐Solvation toward Highly Stable Dendrite‐Free Zinc‐Metal Batteries
Authors: Zhou Shuang , Meng Xinyu , Fu Chunyan , Xu Dongming , Li Jianwen , He Qiong , Lin Shangyong , Liang Shuquan , Chang Zhi , Pan Anqiang 
Published: July 2023

AbstractWater‐induced parasitic reactions and uncontrolled dendritic Zn growth are long‐lasting tricky problems that severely hinder the development of aqueous zinc‐metal batteries. Those notorious issues are closely related to electrolyte configuration and zinc‐ion transport behavior. Herein, through constructing aligned dipoles induced electric‐field on Zn surface, both the solvation structure and transport behavior of zinc‐ions are fundamentally changed. The vertically ordered zinc‐ion migration trajectory and gradually concentrated zinc‐ion achieved inside the polarized electric‐field remarkably eliminate water related side‐reactions and Zn dendrites. Zn‐metal under the polarized electric‐field demonstrated significantly improve reversibility and a dendrite‐free surface with strong (002) Zn deposition texturing. Zn||Zn symmetric cell delivers greatly prolonged lifespan up to 1400 h (17 times longer than that of the cell based on bare Zn) while the Zn||Cu half‐cell demonstrate ultrahigh 99.9% coulombic efficiency. NH4V4O10||Zn half‐cell delivered exceptional‐high 132 mAh g−1 capacity after ultralong 2000 cycles (≈100% capacity retention). In addition, MnO2||Zn pouch‐cell under aligned dipoles induced electric‐field maintains 87.9% capacity retention after 150 cycles under practical condition of high MnO2 mass loading (≈10 mg cm−2) and limited N/P ratio. It is considered that this new strategy can also be implemented to other metallic batteries and spur the development of batteries with long‐lifespan and high‐energy‐density.
Novel PdPtCu Nanozymes for Reprogramming Tumor Microenvironment to Boost Immunotherapy Through Endoplasmic Reticulum Stress and Blocking IDO‐Mediated Immune Escape
Authors: Xie Yulin , Wang Man , Qian Yanrong , Li Lei , Sun Qianqian , Gao Minghong , Li Chunxia 
Published: July 2023

AbstractBreaking immunosuppressive tumor microenvironment (TME) has unique effects on inhibiting tumor growth and recurrence. Here, an endoplasmic reticulum (ER) targeted PdPtCu nanozyme (PNBCTER) is prepared to boost immunotherapy. First, PNBCTER has three kinds of enzyme activities, including catalase (CAT), glutathione oxidase (GSHOx), and peroxidase (POD)‐like activities, which can reshape the TME. Second, PNBCTER kills tumor cells by photodynamic therapy (PDT) and photothermal therapy (PTT). Third, guided by TER, PNBCTER not only realizes the combination therapy of PDT, PTT and chemodynamic therapy (CDT), but also damages the ER of tumor cells and actives antitumor immune response, which breaks through the immune blockade of TME. Finally, the NLG919 blocks the tryptophan/kynurenine immune escape pathway and reverses the immunosuppressive TME. The strategy that reshaping the TME by enzyme catalysis and breaking immunosuppression provides a novel way for the application of combination therapy in tumor.
Electrochemical Investigation of Calcium Substituted Monoclinic Li3V2(PO4)3 Negative Electrode Materials for Sodium‐ and Potassium‐Ion Batteries
Authors: Fu Qiang , Guo Bingrui , Hua Weibo , Sarapulova Angelina , Zhu Lihua , Weidler Peter G. , Missyul Alexander , Knapp Michael , Ehrenberg Helmut , Dsoke Sonia 
Published: July 2023

AbstractHerein, the electrochemical properties and reaction mechanism of Li3‒2xCaxV2(PO4)3/C (x = 0, 0.5, 1, and 1.5) as negative electrode materials for sodium‐ion/potassium‐ion batteries (SIBs/PIBs) are investigated. All samples undergo a mixed contribution of diffusion‐controlled and pseudocapacitive‐type processes in SIBs and PIBs via Trasatti Differentiation Method, while the latter increases with Ca content increase. Among them, Li3V2(PO4)3/C exhibits the highest reversible capacity in SIBs and PIBs, while Ca1.5V2(PO4)3/C shows the best rate performance with a capacity retention of 46% at 20 C in SIBs and 47% at 10 C in PIBs. This study demonstrates that the specific capacity of this type of material in SIBs and PIBs does not increase with the Ca‐content as previously observed in lithium‐ion system, but the stability and performance at a high C‐rate can be improved by replacing Li+ with Ca2+. This indicates that the insertion of different monovalent cations (Na+/K+) can strongly influence the redox reaction and structure evolution of the host materials, due to the larger ion size of Na+ and K+ and their different kinetic properties with respect to Li+. Furthermore, the working mechanism of both LVP/C and Ca1.5V2(PO4)3/C in SIBs are elucidated via in operando synchrotron diffraction and in operando X‐ray absorption spectroscopy.
Magnetotelluric Power Line Noise Removal Using Temporally Varying Sinusoidal Subtraction of the Grid Utility Frequency
Authors: Klanica Radek , Pek Josef , Hill Graham 
Published: July 2023

AbstractThe magnetotelluric method relies on variations of natural electromagnetic fields, which in the vicinity of human settlements are persistently distorted by anthropogenic electromagnetic noise. A large source of noise to the magnetotelluric response is caused by the harmonic oscillations of the power network utility frequency centered on 50/60 Hz along with the associated higher harmonics. Removing this type of noise is essential for high frequency magnetotelluric measurements used for shallow surveys. There are a large number of approaches for how to treat power line noise in magnetotelluric signals, however, commonly used methods do not take into account time variations/instabilities of the utility frequency. That is not serious problem in vicinity of well balanced grid networks, but can cause issues in regions with larger utility frequency variations. Under such conditions, commonly used methods loose more of the natural signal, which is undesirable especially in case of very noisy datasets. Hence, we adopted approach for removing of power line noise with respect to time variations of the utility frequency and applied it to magnetotelluric signals to preserve more of natural signal. The method is based on modelling of the grid network harmonic oscillations by the optimum utility frequency and its integer multiples. The resulting sum of sinusoidal signals is subsequently subtracted from recorded data and only particular noise frequencies are removed from the original signal with high precision, while frequency ranges around power line harmonics are cleaned.
Validation of a mathematical–geometrical model to calculate the length of an individual anterior arch
Authors: Paddenberg Eva , Heiß Raphael , Grünbaum Tobias , Proff Peter , Kirschneck Christian 
Published: July 2023

Abstract

Purpose
For resolving anterior dental crowding or spacing, it is of key interest in personalised orthodontic diagnostics and treatment planning to predict the extent of space gained or lost in the anterior dental arch by changing incisor inclination or position. To facilitate the determination of anterior arch length (AL) and to predict its alterations following tooth movements, a mathematical–geometrical model, based on a third-degree parabola, was established. The aim of this study was to validate this model and assess its diagnostic precision.

Methods
This retrospective diagnostic study evaluated 50 randomly chosen dental casts taken before (T0) and after (T1) orthodontic treatment with fixed appliances. Plaster models were digitally photographed, allowing two-dimensional digital measurements of arch width, depth and length. A computer programme based on the mathematical–geometrical model to be validated was created to calculate AL for any given arch width and depth. Mean differences and correlation coefficients as well as Bland–Altman plots were used to compare the measured and the calculated (predicted) AL, evaluating the precision of the model.

Results
Inter- and intrarater reliability tests showed reliable measurements of arch width, depth and length. Measured and calculated (predicted) AL revealed high concordance according to concordance correlation coefficient (CCC), intraclass correlation coefficient (ICC), and Bland–Altman analyses and negligible differences between the mean values.

Conclusions
The mathematical–geometrical model calculated anterior AL without significant difference to the measured AL, indicating its validity. The model can thus be used clinically for predicting alterations of AL following therapeutic changes of incisor inclination/position.
Sprachverstehen im modulierten Störgeräusch bei bimodal versorgten CI-Tragenden
Authors: Weißgerber Tobias , Stöver Timo , Baumann Uwe 
Published: July 2023

Zusammenfassung
Hintergrund
Obwohl bei einer Versorgung mit Cochleaimplantaten (CI) ein gutes Sprachverstehen in Ruhe erreichbar ist, ist das Sprachverstehen im Störgeräusch gegenüber Normalhörenden (NH) stark beeinträchtigt. Bei einer bimodalen CI-Versorgung mit Hörgerät (HG) im Gegenohr beeinflusst das akustische Restgehör das Sprachverstehen im Störgeräusch.

Fragestellung
Ziel der Arbeit war es, das Sprachverstehen im Störgeräusch bei bimodaler CI-Nutzung zu untersuchen und mit gleichaltrigen HG-Tragenden und Menschen ohne subjektive Hörminderung sowie einer jungen NH-Gruppe zu vergleichen.

Material und Methoden
Es nahmen 19 bimodale CI-Tragende, 39 HG-Tragende und 40 subjektive Normalhörende der Altersklasse 60–90 Jahre und 14 junge NH teil. Die Sprachverständlichkeitsschwelle (SVS) im Störgeräusch wurde mit dem Oldenburger Satztest adaptiv für die 2 räumlichen Testkonditionen S0N0 (Sprache und Störgeräusch von vorne) und „multisource-noise field“ (MSNF, Sprache von vorne, 4 räumlich verteilte Störgeräuschquellen) jeweils im zeitlich kontinuierlichen Oldenburger Rauschen (Olnoise) und im zeitlich modulierten Fastl-Noise (amplitudenmoduliertes, sprachsimulierendes, fluktuierendes Störgeräusch nach Fastl) bestimmt.

Ergebnisse
Mit zunehmender Hörminderung wurde die mediane SVS in allen Bedingungen signifikant schlechter. In der Testbedingung S0N0 war die SVS der CI-Gruppe im Olnoise um 5,6 dB und im Fastl-Noise um 22,5 dB schlechter als die der jungen NH-Gruppe (mittleres Alter: 26,4 Jahre) im MSNF betrugen die Unterschiede 6,6 dB (Olnoise) bzw. 17,3 dB (Fastl-Noise). In der jungen NH-Gruppe verbesserte sich die mediane SVS in der Bedingung S0N0 durch Lückenhören um 11 dB, in der älteren NH-Gruppe um nur noch 3,1 dB. In der HG-Gruppe und der bimodal versorgten CI-Gruppe gab es kein Lückenhören, und die SVS war im Fastl-Noise schlechter als im Olnoise.

Schlussfolgerung
Bei fortschreitender Hörminderung wird das Sprachverstehen im modulierten Störgeräusch sogar stärker beeinträchtigt als im kontinuierlichen Störgeräusch.
A mean field game model for COVID-19 with human capital accumulation
Authors: Ghilli Daria , Ricci Cristiano , Zanco Giovanni 
Published: July 2023

AbstractIn this manuscript, we study a model of human capital accumulation during the spread of disease following an agent-based approach, where agents behave maximising their intertemporal utility. We assume that the agent interaction is of mean field type, yielding a mean field game description of the problem. We discuss how the analysis of a model including both the mechanism of change of species from one epidemiological state to the other and an optimisation problem for each agent leads to an aggregate behaviour that is not easy to describe, and that sometimes exhibits structural issues. Therefore we eventually propose and study numerically a SEIRD model in which the rate of infection depends on the distribution of the population, given exogenously as the solution to the mean field game system arising as the macroscopic description of the discrete multi-agent economic model for the accumulation of human capital. Such a model arises in fact as a simplified but tractable version of the initial one.
Spectral Analysis of Discrete Metastable Diffusions
Authors: Di Gesù Giacomo 
Published: July 2023

AbstractWe consider a discrete Schrödinger operator $$ H_\varepsilon = -\varepsilon ^2\Delta _\varepsilon + V_\varepsilon $$

H
ε

=
-

ε
2

Δ
ε

+

V
ε

on $$\ell ^2(\varepsilon \mathbb {Z}^d)$$

ℓ
2

(
ε

Z

d

)

, where $$\varepsilon >0$$

ε
>
0

is a small parameter and the potential $$V_\varepsilon $$

V
ε

is defined in terms of a multiwell energy landscape f on $$\mathbb {R}^d$$

R

d

. This operator can be seen as a discrete analog of the semiclassical Witten Laplacian of $$\mathbb {R}^d$$

R

d

. It is unitarily equivalent to the generator of a diffusion on $$\varepsilon \mathbb {Z}^d$$

ε

Z

d

, satisfying the detailed balance condition with respect to the Boltzmann weight $$\exp {(-f/\varepsilon )}$$

exp

(
-
f
/
ε
)

. These type of diffusions exhibit metastable behavior and arise in the context of disordered mean field models in Statistical Mechanics. We analyze the bottom of the spectrum of $$H_\varepsilon $$

H
ε

in the semiclassical regime $$\varepsilon \ll 1$$

ε
≪
1

and show that there is a one-to-one correspondence between exponentially small eigenvalues and local minima of f. Then we analyze in more detail the bistable case and compute the precise asymptotic splitting between the two exponentially small eigenvalues. Through this purely spectral-theoretical analysis of the discrete Witten Laplacian we recover in a self-contained way the Eyring–Kramers formula for the metastable tunneling time of the underlying stochastic process.
Diagnostic performance and interreader agreement of individual and combined non-enhanced and contrast-enhanced MR imaging parameters in adhesive capsulitis of the shoulder
Authors: Erber Bernd , Hesse Nina , Goller Sophia , Gilbert Fabian , Ricke Jens , Glaser Christian , Heuck Andreas 
Published: July 2023

Abstract
Objective
The aims of our study were to analyze agreement among readers with different levels of expertise and diagnostic performance of individual and combined imaging signs for the diagnosis of adhesive capsulitis of the shoulder.

Methods
In a retrospective study, contrast-enhanced shoulder MRIs of 60 patients with and 120 without clinically diagnosed adhesive capsulitis were evaluated by three readers independently. As non-enhanced imaging signs, readers evaluated signal intensity and thickness of the axillary recess capsule, thickness of the rotator interval capsule and the coracohumeral ligament as well as obliteration of subcoracoid fat. Furthermore, contrast enhancement of axillary recess and rotator interval capsule were evaluated. Data analysis included interreader reliability, ROC analysis, and logistic regression (p < 0.05).

Results
Contrast-enhanced parameters showed substantially higher agreement among readers (ICC 0.79–0.80) than non-enhanced parameters (0.37–0.45). AUCs of contrast-enhanced signs (95.1–96.6%) were significantly higher (p < 0.01) than of non-enhanced imaging signs (61.5–85.9%) when considered individually. Combined evaluation of axillary recess signal intensity and thicknesses of axillary recess or rotator interval—when at least one of two signs was rated positive—increased accuracy compared to individual imaging signs, however not statistically significant.

Conclusion
Contrast-enhanced imaging signs show both distinctly higher agreement among readers and distinctly higher diagnostic performance compared to non-enhanced imaging signs based on the imaging protocol used in this study. Combined evaluation of parameters showed a tendency to increase discrimination; however, the effect on diagnosis of ACS was not statistically significant.