bluuebunny/crossref_metadata_2025_split huggingface dataset:
Distributed formation control of networked mobile robots from the Udwadia–Kalaba approach
Authors: Liu Pengfei , Hao Yuqing , Wang Qingyun , Chen Guanrong 
Published: August 2023

AbstractIn this article, formation control of networked mobile robots is studied. Two control strategies for the leaderless case and the leader‐following case are developed from the Udwadia–Kalaba approach, respectively. Differing from the existing results about formation control, which focus on kinematic models of robots, this article considers dynamic models and obtained a lower‐cost control force. To improve the robustness of the communication network, two distributed formation controllers are designed by establishing distributed estimators. Different from the centralized controllers, the distributed controllers established here only require local information, thus save communication resources and improve system robustness. Finally, some numerical simulations are provided to demonstrate the proposed methods are effective and have lower control cost.
Synthesis, Biological Evaluation, Molecular Docking and Kinetic Investigation of New 2,4,5‐Trisubstituted Imidazole Derivatives as Antidiabetic Agents
Authors: Kumar Pawan , Syal Bindu , Seboletswe Pule , Cele Nosipho , Olofinsan Kolawole , Singh Parvesh , Shahidul Islam Md. , Singh Deepika , Gupta Princy 
Published: August 2023

AbstractA series of novel 2,4,5‐trisubstituted imidazole motifs have been synthesized by a magnetically‐tuned halloysite‐supported sulfonic acid catalyst. The prepared supported sulfonic acid catalyst was well characterized by High‐resolution transmission electron microscopy (HR‐TEM), Scanning electron microscopy (SEM), Energy dispersive X‐rays spectroscopy (EDS), Fourier transform infrared (FTIR), X‐ray powder diffraction (XRD), Thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET), and Vibrating–sample magnetometry (VSM) techniques; and compounds were confirmed by 1H, 13C‐Nuclear magnetic resonance (NMR) and High resolution mass spectrometry (HRMS) techniques. The purity of compounds was established by High performance liquid chromatography (HPLC). All the prepared compounds were screened for their in vitro antidiabetic activity by using α‐amylase and α‐glucosidase inhibition assay taking acarbose as a reference standard and were found to exhibit significant α‐amylase inhibitory potentials, whereas for α‐glucosidase inhibition, compounds were equipotent to the reference standard. Compound bearing ferrocene moiety was identified as the strongest α‐amylase inhibitor of the series with IC50=47.83±0.63 μM, a five‐fold more potency compared to acarbose (IC50 =269.39±0.29 μM). The presence of substituents in the second position of imidazole pharmacophore plays a key role in inhibitory activity. To find the possible binding interaction of compounds, in silico molecular docking study was performed.
Differences in the Effect of Water on Deep Eutectic Solvents Based on Choline Chloride/Lauric Acid and Choline Chloride/Myristic Acid: Molecular Dynamics Simulations at Three Different Temperatures
Authors: Pour Samaneh Barani , Behrooz Nasrin Jabbarvand , Sardroodi Jaber Jahanbin , Ebrahimzadeh Alireza Rastkar , Pazuki Gholam Reza 
Published: August 2023

AbstractApplication of deep eutectic solvents based on fatty acids in different fields of biological and therapeutic sciences, such as novel hydrophobic Volatile organic compounds (VOC) absorbents, etc. However, industries need knowledge and precise investigation of the structural and dynamic properties of these solvents. In this work, the effect of water on the dynamical and structural properties of the binary mixtures of choline chloride+two types of Fatty acids; Lauric (LUA), and Myristic (MRA) acids have been investigated at T=343 K, 443 K, 543 K. An additional NPT production run of 30 ns was considered for the binary mixtures. In order to understand the effective interactions in the formation of the eutectic mixture based on fatty acid and choline chloride, the combined distribution functions (CDFs) involving the radial distribution functions (RDFs) and the angular distribution functions (ADFs), the hydrogen‐bonding network, and spatial distribution functions (SDFs), interaction energies between species were calculated for the binary mixtures. Also, the dynamical properties of DESs have been evaluated by calculating the mean‐square displacement (MSD), the velocity autocorrelation function (VACF) of the centers of mass of the molecules, and the self‐diffusion coefficient.
Synthesis of α‐Hydroxyl Ketones by Metal‐Free C=C Double Bond Cleavage of Enaminones in Aqueous Medium
Authors: Gan Lu , Liu Yunyun , Wang Chaoli , Wan Jie‐Ping 
Published: August 2023

AbstractThe C=C double bond cleavage of enaminones has been accomplished in the presence of methyl sulfonyl azide (MSA) to provide α‐hydroxyl ketones via the reaction with water. The major process of the reactions consists of the formation of a key α‐diazoketone intermediate resulting from the enaminone‐azide annulation, and a successive decomposition. Totally 22 α‐hydroxyl ketones have been synthesized with the yield range from 43 %–83 %.
Regulation of the supramolecular self‐assembly process by the number of 1, 8‐naphthalimide groups in the gelator
Authors: Wu Huijuan , Ma Xiaocai , Gao Aiping , Cao Xinhua 
Published: August 2023

AbstractThree naphthalimide‐based gelators (NE1,NE2, NE3) with corresponding one, two and three N‐undecanoic acid methylester‐1,8‐naphthalimide were designed and synthesized (the abbreviation NE1‐NE3, N assigned to the naphthalimide, E assigned to ester, and numerber representing the number of N‐undecanoic acid methylester‐1,8‐naphthalimide) The different number of 1, 8‐naphthalimide groups in gelator endowed them with the different central groups, conjugated structures and steric configurations, which could bring different self‐assembly abilities and behaivors. The self‐assembly processes of three gelators in different solvents were characterized by multiple characterization technologies. The gelation ability, self‐assembly structure, fluorescence emission behavior, material surface wettability of this system could be regulated by the number of 1, 8‐naphthalimide groups. Gelator NE1 possessed the best gelation ability among three gelators, and the self‐assembly structures in gels NE1 from different solvents were completely different from that of gels NE2 and NE3. In addition, surface wettability of film NE1 exhibited the highest hydrophobicity under the same condition. Fluorescence emission behavior of this system could be tuned by the number of 1, 8‐naphthalimide groups solvent and gel state. At the same condition, the absorbance at the same band was gradually decreased with the number of 1, 8‐naphthalimide groups increasing. This work will provide a new design way for construction of functional supramolecular self‐assembly process.
Biomimetic Nano‐Immunoactivator via Ionic Metabolic Modulation for Strengthened NIR‐II Photothermal Immunotherapy
Authors: Wei Xiaodan , Huang Honglin , Guo Junhan , Li Ningxi , Li Qingzhi , Zhao Tian , Yang Geng , Cai Lulu , Yang Hong , Wu Chunhui , Liu Yiyao 
Published: August 2023

AbstractReprogramming the immunologically “cold” environment of solid tumors is currently becoming the mainstream strategy to elicit powerful and systemic anticancer immunity. Here, a facile and biomimetic nano‐immunnoactivator (CuS/Z@M4T1) is detailed by engineering a Zn2+‐bonded zeolitic imidazolate framework‐8 (ZIF‐8) with CuS nanodots (NDs) and cancer cell membrane for amplified near‐infrared‐II (NIR‐II) photothermal immunotherapy via Zn2+ metabolic modulation. Taking advantage of the NIR‐II photothermal effect of CuS NDs and the acidic responsiveness of ZIF‐8, CuS/Z@M4T1 rapidly causes intracellular Zn2+ pool overload and disturbs the metabolic flux of 4T1 cells, which effectively hamper the production of heat shock proteins and relieve the resistance of photothermal therapy (PTT). Thus, amplified immunogenic cell death is evoked and initiates the immune cascade both in vivo and in vitro as demonstrated by dendritic cells maturation and T‐cell infiltration. Further combination with antiprogrammed death 1 (aPD‐1) achieves escalated antitumor efficacy which eliminates the primary, distant tumor and avidly inhibits lung metastasis due to cooperation of enhanced photothermal stimulation and empowerment of cytotoxic T lymphocytes by aPD‐1. Collectively, this work provides the first report of using the intrinsic modulation property of meta‐organometallic ZIF‐8 for enhanced cancer photoimmunotherapy together with aPD‐1, thereby inspiring a novel combined paradigm of ion‐rich nanomaterials for cancer treatment.
Optimal boosting method of HPC concrete compressive and tensile strength prediction
Authors: Chao Xu 
Published: August 2023

AbstractThe evaluation of fly ash (FA) and micro‐silica (MS) effects on the mechanical properties of concrete at various ages prompts the search for efficient factors in forecasting the compressive strength (CS) and tensile strength (TS), which are extendable for future investigation as well as practical use. The main aim of this article is to overcome the complexity caused by nonlinearity, which is rooted in the relationship between input variables and outputs. Also, the nonlinearity is getting worse through the existence of admixtures. The Adaptive Boosting (ADA) approach was utilized in the related study as a hybrid model to provide an optimal relation between the ingredients and the mechanical strengths for evaluating the parameters most useful in predicting the CS and TS of high‐performance concrete. Furthermore, model boosting is applied using the starling murmuration optimization (SMO), termite queen algorithm (TQO), and gannet optimization algorithm (GOA) algorithms to reach the highest convergence. As a result of assessing the related models, the ADA‐SMO obtained a coefficient correlation of 0.9981 and 0.9825 for the predictions of CS and TS, respectively. Considering the adaptive framework provided to have the best compatibility with the complex physics of the problem, the ADA‐SMO earned the highest level of accuracy in estimating CS and TS among other hybrid models and was introduced as a trustable model in the prediction of strength properties.
Metoprolol elicits neurobehavioral insufficiency and oxidative damage in nontarget Nauphoeta cinerea nymphs
Authors: Oyedele Gbemisola T. , Adedara Isaac A. , Ikeji Cynthia N. , Afolabi Blessing A. , Rocha Joao B. T. , Farombi Ebenezer O. 
Published: August 2023

AbstractMetoprolol, a drug for hypertension and cardiovascular diseases, has become a contaminant of emerging concern because of its frequent detection in various environmental matrices globally. The dwindling in the biodiversity of useful insects owing to increasing presence of environmental chemicals is currently a great interest to the scientific community. In the current research, the toxicological impact of ecologically relevant concentrations of metoprolol at 0, 0.05, 0.1, 0.25, and 0.5 μg/L on Nauphoeta cinerea nymphs following exposure for 42 consecutive days was evaluated. The insects' behavior was analyzed with automated video‐tracking software (ANY‐maze, Stoelting Co, USA) while biochemical assays were done using the midgut, head and fat body. Metoprolol‐exposed nymphs exhibited significant diminutions in the path efficiency, mobility time, distance traveled, body rotation, maximum speed and turn angle cum more episodes, and time of freezing. In addition, the heat maps and track plots confirmed the metoprolol‐mediated wane in the exploratory and locomotor fitness of the insects. Compared with control, metoprolol exposure decreased acetylcholinesterase activity in insects head. Antioxidant enzymes activities and glutathione level were markedly decreased whereas indices of inflammation and oxidative injury to proteins and lipids were significantly increased in head, midgut and fat body of metoprolol‐exposed insects. Taken together, metoprolol exposure induces neurobehavioral insufficiency and oxido‐inflammatory injury in N. cinerea nymphs. These findings suggest the potential health effects of environmental contamination with metoprolol on ecologically and economically important nontarget insects.
Maize and heat stress: Physiological, genetic, and molecular insights
Authors: Djalovic Ivica , Kundu Sayanta , Bahuguna Rajeev Nayan , Pareek Ashwani , Raza Ali , Singla‐Pareek Sneh L. , Prasad P. V. Vara , Varshney Rajeev K. 
Published: August 2023

AbstractGlobal mean temperature is increasing at a rapid pace due to the rapid emission of greenhouse gases majorly from anthropogenic practices and predicted to rise up to 1.5°C above the pre‐industrial level by the year 2050. The warming climate is affecting global crop production by altering biochemical, physiological, and metabolic processes resulting in poor growth, development, and reduced yield. Maize is susceptible to heat stress, particularly at the reproductive and early grain filling stages. Interestingly, heat stress impact on crops is closely regulated by associated environmental covariables such as humidity, vapor pressure deficit, soil moisture content, and solar radiation. Therefore, heat stress tolerance is considered as a complex trait, which requires multiple levels of regulations in plants. Exploring genetic diversity from landraces and wild accessions of maize is a promising approach to identify novel donors, traits, quantitative trait loci (QTLs), and genes, which can be introgressed into the elite cultivars. Indeed, genome wide association studies (GWAS) for mining of potential QTL(s) and dominant gene(s) is a major route of crop improvement. Conversely, mutation breeding is being utilized for generating variation in existing populations with narrow genetic background. Besides breeding approaches, augmented production of heat shock factors (HSFs) and heat shock proteins (HSPs) have been reported in transgenic maize to provide heat stress tolerance. Recent advancements in molecular techniques including clustered regularly interspaced short palindromic repeats (CRISPR) would expedite the process for developing thermotolerant maize genotypes.
Placental lakes vs lacunae: spot the differences
Authors: Jauniaux E. , Zosmer N. , D'Antonio F. , Hussein A. M. 
Published: August 2023

AbstractSonographic sonolucencies are anechoic areas surrounded by tissue of normal echogenicity, commonly found in the placental parenchyma during the second and third trimesters of pregnancy. The ultrasound appearance of lakes and lacunae derives from the low echogenicity of villous‐free areas within the placental parenchyma, filled with maternal blood of varying velocities. In normal placentation, lakes usually start appearing as soon as maternal blood begins to flow freely within the intervillous space at the end of the first trimester, whereas, in accreta placentation, lacunae develop progressively during the second trimester. Larger lakes are found mainly in areas of lower villous density under the fetal plate or in the marginal areas, but can also be found in the center of a lobule above the entry of a spiral artery. Lakes of variable size, position and shape are of no clinical significance, except if they transform into echogenic cystic lesions, which have been associated with poor fetal growth and placental malperfusion. Lacunae are formed by the distortion of one or more placental lobules developing inside a uterine scar, resulting from high‐volume, high‐velocity flows from the radial/arcuate arteries, and are associated with a high probability of placenta accreta spectrum at birth. They often present with ultrasound signs of uterine remodeling following scarring. Lakes and lacunae can coexist within the same placenta and both will change in size and shape as pregnancy advances. Better understanding of the etiopathology of placental sonolucent spaces and associated morphological changes is necessary to identify patients at risk of subsequent complications during pregnancy and/or at delivery. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
Unsupervised clustering using nonparametric finite mixture models
Authors: Hunter David R. 
Published: August 2023

AbstractThis article presents basic ideas of finite mixture models in which the number of components is known and the distributions comprising the components are not assumed to come from any parametrically specified family.This article is categorized under:Algorithms and Computational Methods > AlgorithmsStatistical Learning and Exploratory Methods of the Data Sciences > Clustering and ClassificationStatistical and Graphical Methods of Data Analysis > Nonparametric MethodsStatistical Models > Classification Models
Electronic structure of the high‐spin Co4+ system Ba2CoO4
Authors: Takegami Daisuke , Hu Zhiwei , Falke Johannes , Meléndez‐Sans Anna , Liu Cheng‐En , Chang Chun‐Fu , Kuo Chang‐Yang , Chen Chien‐Te , Guo Hanjie , Komarek Alexander , Tanaka Arata , Hébert Sylvie , Tjeng Liu Hao 
Published: August 2023

AbstractThe electronic structure of the semiconductor Ba2CoO4 has been investigated using x‐ray absorption spectroscopy at the Co‐L2,3 and O‐K edges as well as soft x‐ray valence band photoemission. The spectra can be accurately reproduced by a combination of full atomic‐multiplet configuration‐interaction cluster calculations and ab‐initio band structure analysis. The large negative O 2p to Co 3d charge‐transfer energy has been established as well as the high stability of the S=5/2 high‐spin state of the Co4+ ion. The band gap of this high‐oxidation state material is sizeable and can be attributed to the joint effect of electron correlations, the local tetrahedral coordination of the Co ions, and the poor electronic connection between the CoO4 tetrahedra.
The 1D‐Polymeric (Te72+)n in (Te7)[MF6]2 (M=As, Sb, Nb, Ta) by Solvothermal, Microwave Assisted, and Electrochemical Synthesis
Authors: Zink Marcus , Zimbardi Christopher , Daniels Jörg , Bredow Thomas , Beck Johannes 
Published: August 2023

AbstractReactions of tellurium with metal pentafluorides MF5 (M=As, Sb, Nb, Ta) in liquid SO2 under supercritical conditions at 160 °C yield (Te7)[MF6]2 containing the polymeric Zintl cation (Te72+)n consisting of chair‐shaped Te6 rings connected via single Te atoms. Crystal structure analyses show all four compounds to crystallize isotopically in the (Te7)[AsF6]2 structure type. Monitoring the reactions via Raman spectra reveal that (Te4)[MF6]2 is formed as an intermediate, which reacts with Te finally to (Te7)[MF6]2. Crystal structures of (Te4)[MF6]2 (M=Nb, Ta) were determined. Microwave assisted solvothermal synthesis give analogous results in very short reaction time. All compounds are also accessible via electrochemical oxidation of Te in presence of [MF6]− as electrolyte. (Te7)[AsF6]2 is a semiconductor with σ=10−7 S/cm at 300 K and an energy for the thermally activated electron process of 0.91 eV. Theoretical calculations on the self‐consistent hybrid DFT level confirm that the fundamental band gap is independent from the kind of M. The frontier orbitals are predominantly composed of Te states. Raman bands at 196, 178, 153, and 138 cm−1 are specific for (Te72+)n. Phonon calculations of (Te7)[TaF6]2 confirm three intensive Raman bands at 210, 174 and 163 cm−1. The corresponding normal modes are mainly localized on (Te7)n.
Atmospheric Water Harvesting in Microporous Organic Polymers Constructed from Trazine and Benzimidazole Units
Authors: Huang Jitao , Yang Yisi , Chen Liangji , Zhang Zhangjing , Xiang Shengchang 
Published: August 2023

AbstractPorous materials‐assisted atmospheric water harvesting (AWH) approaches are attractive for addressing the severe shortage of freshwater resources. Herein, ionothermal polymerization approach was employed to realize four porous organic polymers (FJU‐CTFs) with strong hydration stability and low skeleton density for atmospheric water harvesting. The materials exhibited ultra‐high water vapor adsorption capacity (1108 cm3 g−1), s‐type adsorption isotherms, and rapid filling of water vapor in the pores of the materials under low humidity conditions. It has the characteristics of atmospheric water harvesting from the air at lower humidity (30 %–40 %) and narrow temperature (30–35 °C). A total of 30 times of water adsorption‐desorption cycles showed the excellent working ability and hydrolytic stability of FJU‐CTFs, which provided new solutions for the application of porous materials in AWH and expanded new material types.
A Celestial route to AdS bulk locality
Authors: Bhat Faizan , Zahed Ahmadullah 
Published: August 2023

Abstract
We prove a precise form of AdS bulk locality by deriving analytical two-sided bounds on bulk Wilson coefficients. Our bounds are on the Wilson coefficients themselves, rather than their ratios, as is typically found in the literature. Inspired by the Celestial amplitudes program in flat space, we perform a Celestial transform of the CFT Mellin amplitude of four identical scalars. Using the crossing symmetric dispersion relation (CSDR), we express the resulting amplitude in terms of crossing symmetric conformal partial waves. The partial waves satisy remarkable positivity properties which along with the unitarity of the CFT prove sufficient to derive the bounds. We then employ our methods in the limit of large AdS radius and recover known bounds on flat space Wilson coefficients and new bounds on their large radius corrections. We check that the planar Mellin amplitude of four stress-tensor multiplets in $$ \mathcal{N} $$
N
= 4 SYM satisfies our bounds. Finally, using null constraints, we derive a form of low-spin dominance in AdS EFTs. We find that the low-spin dominance is strongest in flat space and weakens as we move away from flat space towards higher AdS curvature.
Erfahrungen mit der endoskopischen Ohrchirurgie an einer deutschen Hals‑, Nasen‑, Ohrenklinik der Maximalversorgung
Authors: Flockerzi Veronika , Schick Bernhard , Bozzato Alessandro 
Published: August 2023

Zusammenfassung
Hintergrund
Die vorliegende Arbeit berichtet über die Integration der endoskopischen Ohrchirurgie (EES) in den klinischen Alltag.

Material und Methoden
In einer monozentrischen prospektiven Studie wurde über 10 Monate in geraden Wochen die Endoskopieeinheit zur Ohroperation mit aufgebaut und der Eingriff primär endoskopisch über einen transmeatalen Zugang begonnen. In ungeraden Wochen wurde auf das Endoskop verzichtet. Ausgewertet wurden 60 Eingriffe bei 59 PatientInnen. Vergleichspunkte waren die intraoperative Sicht, die Schnitt-Naht-Zeit, das postoperative Hörergebnis sowie der postoperative otoskopische Befund.

Ergebnisse
Mit Ausnahme des Nervus facialis (p = 0,15 Mann-Whitney-U-Test) zeigte sich eine signifikant verbesserte Visualisierung aller Bereiche des Mittelohrs bei der EES. Die Schnitt-Naht-Zeiten waren im Methodenvergleich ähnlich. Sofern eine bimanuelle Platzierung von Ossikelprothesen notwendig war, verlängerte sich die Schnitt-Naht-Zeit überproportional (MES: 57,18 ± 9,7 min, EES: 76,83 ± 24,99 min; p = 0,019, signifikant da p < 0,05). Statistisch signifikante Änderungen bezogen auf die Hörergebnisse ergeben sich bei Vergleich der EES mit der mikroskopischen Technik nicht. In der Gruppe der EES-Operationen zeigten sich keine postoperativen Komplikationen.

Schlussfolgerung
Die endoskopische Operationstechnik hat sich an einem realen Patientenkollektiv an unserem Standort bewährt.