bluuebunny/crossref_metadata_2025 huggingface dataset:
Cascade annulative π-extension for the rapid construction of carbazole based polyaromatic hydrocarbons
Authors: Kundu Samrat , Banerjee Ankush , Pal Shyam Chand , Ghosh Meghna , Maji Modhu Sudan
Published: May 2021

Brønsted acid catalyzed cascade benzannulation strategy for the concise synthesis of benzo[a]carbazoles is reported. Efficacy of the methodology was further validated by synthesizing structurally diverse, extensive π-conjugated carbazole based PAHs.
Supramolecular polymer-directed light-harvesting system based on a stepwise energy transfer cascade
Authors: Xiao Tangxin , Zhang Liangliang , Wu Haoran , Qian Hongwei , Ren Dongxing , Li Zheng-Yi , Sun Xiao-Qiang
Published: May 2021

An artificial light-harvesting system based on supramolecular polymeric nanoparticles has been successfully assembled in water, which displays efficient two-step sequential energy-transfer processes with a high antenna effect.
An alginate-confined peroxygenase-CLEA for styrene epoxidation
Authors: Nintzel Friederike E. H. , Wu Yinqi , Planchestainer Matteo , Held Martin , Alcalde Miguel , Hollmann Frank
Published: May 2021

An alginate-confined peroxygenase-CLEA has been prepared for the stereoselective epoxidation of cis-β-methylstyrene under non-aqueous reaction conditions. Product titres of up to 48 mM and excellent enzyme turnovers of 96 000 have been achieved.
Correction: Tethered CAAC–CAAC dimers: oxidation to persistent radical cations and bridging-unit dependent reactivity/stability of the dications
Authors: Nayak Mithilesh Kumar , Suhr Simon , Chrysochos Nicolas , Rawat Hemant , Schulzke Carola , Chandrasekhar Vadapalli , Sarkar Biprajit , Jana Anukul
Published: May 2021

Correction for ‘Tethered CAAC–CAAC dimers: oxidation to persistent radical cations and bridging-unit dependent reactivity/stability of the dications’ by Mithilesh Kumar Nayak et al., Chem. Commun., 2021, 57, 1210–1213, DOI: 10.1039/D0CC07385G.
Formation mechanism of liquid inclusions in dicumyl peroxide crystals
Authors: Zhou Jing , Hao Lin , Hao Hongxun , Ji Xiongtao , Li Jun , Zhou Lina
Published: May 2021

Three crystal habit products and the formation mechanism of hexagonal crystal defects.
Light-fueled rapid macroscopic motion of a green fluorescent organic crystal
Authors: Giri Prasenjit , Mazumder Abhrojyoti , Dey Dibyendu , Garani Souvik , Raveendran Anju , Panda Manas K.
Published: May 2021

We report here a new green fluorescent organic crystal of an amide functionalized acrylonitrile derivative (E-ArF2) that displays various types of macroscopic response when illuminated with UV light (390 nm).
Influence of nuclear spins on electron spin coherence in isolated, p-doped tin clusters
Authors: Fuchs Thomas M. , Schäfer Rolf
Published: May 2021

Electron spin coherence is probed for the superatomic cluster AlSn12 in a molecular beam deflection experiment. Nuclear spins diminish electron spin coherence which is discussed within spin dynamics on avoided level crossings.
A theoretical study of wrinkle propagation in graphene with flower-like grain boundaries
Authors: Zhao Zihui , Wang Yafei , Wang Changguo
Published: May 2021

Dynamic behaviors regarding wrinkle propagation for graphene with rotational flower-like grain boundaries are investigated for the first time.
Theory of the electrostatic surface potential and intrinsic dipole moments at the mixed ionic electronic conductor (MIEC)–gas interface
Authors: Williams Nicholas J. , Seymour Ieuan D. , Leah Robert T. , Mukerjee Subhasish , Selby Mark , Skinner Stephen J.
Published: May 2021

The local activation overpotential describes the electrostatic potential shift away from equilibrium at an electrode/electrolyte interface.
Tuning the hyperconjugative aromaticity in Au(iii)-substituted indoliums
Authors: Zhao Yu , Zeng Jie , Zhu Jun
Published: May 2021

The hyperconjugative aromaticity in Au(iii)-substituted indoliums could be regained or enhanced bycis–transisomerization or ligand effects.
Advanced masking agent for leather tanning from stepwise degradation and oxidation of cellulose
Authors: Jiang Zhicheng , Xu Shuguang , Ding Wei , Gao Mi , Fan Jiajun , Hu Changwei , Shi Bi , Clark James H.
Published: May 2021

An oligosaccharide-based masking agent for Cr-free metal tanning was produced from cellulose via a stepwise degradation and oxidation process.
Thread-based isotachophoresis for DNA extraction and purification from biological samples
Authors: Chen Liang , Cabot Joan M. , Paull Brett
Published: May 2021

A rapid, low-cost, and disposable microfluidic thread-based isotachophoresis method was developed for the purification and preconcentration of nucleic acids from biological samples, prior to their extraction and successful analysis using qPCR.
Thermal considerations for microswimmer trap-and-release using standing surface acoustic waves
Authors: Cui Mingyang , Kim Minji , Weisensee Patricia B. , Meacham J. Mark
Published: May 2021

Glass-based surface acoustic wave (SAW) devices enable trapping and analysis of swimming Chlamydomonas reinhardtii cells without the excessive heating associated with PDMS-based SAW devices.
Room-temperature NH3gas sensor based on atomically dispersed Co with a simple structure
Authors: Tian Renbing , Ji Peng , Luo Zhichao , Li Jiaming , Sun Jinghua
Published: May 2021

Atomically dispersed Co was first used as an NH3 gas sensor in this work, which realized stable and repeatable gas sensing performance at room temperature. A mechanism was proposed to explain the sensing behavior based on atomically dispersed Co.
A cyclodextrin-phenylboronic acid cross-linked hydrogel with drug hosting, self-healing and pH-sensitive properties for sustained drug release
Authors: Chen Daijun , Ren Guanglei , Zhao Xiaoli , Luo Jinni , Wang Huanxia , Jia Pengxiang
Published: May 2021

This work reports a multifunctional hydrogel using cyclodextrin-phenylboronic acid as a reversible, pH-sensitive cross-linker.
Simple and green synthesis of benzimidazoles and pyrrolo[1,2-a]quinoxalinesviaMamedov heterocycle rearrangement
Authors: Li Shichen , Feng Lei , Ma Chen
Published: May 2021

This method is metal and catalyst-free and only solvent (HOAc) is required with H2O as the sole byproduct.
Synthesis, characterization and optical properties of new tetrafluorenyl-porphyrins peripherally functionalized with conjugated 2-fluorenone groups
Authors: Zhang Xu , Sun Zhipeng , Richy Nicolas , Mongin Olivier , Paul Frédéric , Blanchard-Desce Mireille , Paul-Roth Christine O.
Published: May 2021

Star shaped porphyrins decorated with external fluorenonyl arms have been isolated. Their luminescence and selected photophysical properties are discussed in the frame of two-photon-induced theranostics.
Regioselectivity of aminomethylation in 3-acetyl-7-hydroxycoumarins: Mannich bases and Betti bases
Authors: Gao Fan , Tao Deng , Ju Cheng , Yang Bei-Bei , Bao Xiu-Qi , Zhang Dan , Zhang Tian-Tai , Li Li
Published: May 2021

The atomic electron density distribution in 3-acetyl-7-hydroxycoumarin was analysed to elucidate the regioselectivity of aminomethylation.
Understanding the origin of serrated stacking motifs in planar two-dimensional covalent organic frameworks
Authors: Winkler Christian , Kamencek Tomas , Zojer Egbert
Published: May 2021

Planar covalent organic frameworks typically exhibit a serrated packing, which is shown to be a consequence of Pauli repulsion.
Cell-free exosome-laden scaffolds for tissue repair
Authors: Huang Jianghong , Xiong Jianyi , Yang Lei , Zhang Jun , Sun Shuqing , Liang Yujie
Published: May 2021

Exosome seeded on the designed scaffold can achieve local and sustained-release for efficient tissue repair.
Restraining polysulfide shuttling by designing a dual adsorption structure of bismuth encapsulated into carbon nanotube cavity
Authors: Zeng Xingyan , Tang Yakun , Liu Lang , Ma Qingtao , Gao Yang , Qian Mao , Jia Dianzeng
Published: May 2021

1D cowpea-like CNTs@Bi/S composites were synthesized by a facile method. Under the collaboration of the physical detention of CNTs and the chemical adsorption of bismuth nanorods, the polysulfide shuttling can be effectively curbed.
An AlCl3 coordinating interlayer spacing in microcrystalline graphite facilitates ultra-stable and high-performance sodium storage
Authors: Li Zheng , Tian Zhongliang , Zhang Chengzhi , Wang Fei , Ye Chong , Han Fei , Tan Jun , Liu Jinshui
Published: May 2021

Metal chloride-intercalated graphite intercalation compounds (MC-GICs) show a perfect sandwich structure with high electronic conductivity and chemical stability for anode materials of SIBs.
Assembly of polycyclic N-heterocycles via copper-catalyzed cycloamination of indolylquinones and aromatic amines
Authors: Dong Yu , Mei Ting , Ye Ji-Xian , Chen Xiang-Long , Jiang Hui , Chang Bo , Wang Zhi-Fan , Shi Zhi-Chuan , Li Zhong-Hui , He Bing
Published: May 2021

The copper-catalyzed cycloamination of indolylquinones and various (hetero)aromatic amines under ligand-free conditions has been developed. This method allows access to polycyclic N-heterocycles with tolerance of chloride, etc. groups in 60–89%.
N-Heterocyclic carbene-catalyzed [3 + 3] annulation of bromoenals with 2-aminochromones to access chromeno[2,3-b]pyridinones
Authors: Jiang Pengrui , Guo Jingcheng , Gong Minghua , Zhou Xiangui , Cao Wei , Fu Zhenqian , Huang Wei
Published: May 2021

2-Aminochromones were found as novel enamines used in N-heterocyclic carbene-catalyzed [3 + 3] annulation, delivering a structurally diverse set of chromeno[2,3-b]pyridinones.
Turn-on detection of assorted phosphates by luminescent chemosensors
Authors: Kumar Pramod , Pachisia Sanya , Gupta Rajeev
Published: May 2021

This review illustrates a variety of luminescent chemosensors for the selective detection of assorted phosphatesviathe “Turn-On” emission mechanism with focus on their design aspects, chemical structures and sensing mechanism.
Rational design of aqueous conjugated polymer nanoparticles as potential theranostic agents of breast cancer
Authors: Koralli Panagiota , Tsikalakis Spyridon , Goulielmaki Maria , Arelaki Stella , Müller Janina , Nega Alkmini D. , Herbst Friederike , Ball Claudia R. , Gregoriou Vasilis G. , Dimitrakopoulou-Strauss Antonia , Wiemann Stefan , Chochos Christos L.
Published: May 2021

Aqueous conjugated polymer nanoparticles developed by nanoprecipitation from a quinoxaline–thiophene type conjugated polymer with 3 fluorine atoms as potential cancer theranostics for breast cancer.
Recent advances in organocatalytic asymmetric multicomponent cascade reactions for enantioselective synthesis of spirooxindoles
Authors: Wang Yongchao , Cobo Angel A. , Franz Annaliese K.
Published: May 2021

Catalytic asymmetric MCCRs for enantioselective synthesis of spirooxindoles by using chiral phosphoric acids, amines, bifunctional thiourea/squaramides and metal-based reagents as catalysts.
Dehydrogenative 6π heterocyclization under visible light irradiation and mechanistic insights
Authors: Zhang Zhao , Chen Haohua , Keller Niklas , Xiong Qin , Liu Lei , Lan Yu , Bein Thomas , Li Jie
Published: May 2021

A visible-light-driven oxidative 6π heterocyclization for the synthesis of structurally diverse π-conjugated polycyclic 1-aminoisoquinolines has been developed. DFT calculations demonstrated that deprotonation is the rate-determining step.
Selective fluorescent sensing of LMOFs constructed from tri(4-pyridylphenyl)amine ligand
Authors: Ni Jian-Ling , Liang Yu , Shao Juan-Juan , Li Jun-Feng , Zhou Ze-Yu , Wang Fang-Ming , Chen Li-Zhuang
Published: May 2021

Three new LMOFs, complexes 1–3, have been solvothermally synthesized. 1 and 2 are 2-D structures, whiles 3 is a 3-D structure. And 1 exhibits in detecting Fe3+ and Cr3+. All of them have potential applications in chemical sensing.
Cytotoxicity and cell imaging of six types of carbon nanodots prepared through carbonization and hydrothermal processing of natural plant materials
Authors: Chen Yu-Yu , Jiang Wen-Ping , Chen Huan-Luen , Huang Hui-Chi , Huang Guan-Jhong , Chiang Hsiu-Mei , Chang Chang-Cheng , Huang Cheng-Liang , Juang Tzong-Yuan
Published: May 2021

Green nanotechnology of six types of carbon nanodots (CNDs), and their sourcing from abundant natural plants, herbs, and agriculture waste, provides a cost-effective method, with low cytotoxicity and stable fluorescence, for biolabeling and for developing cell nanocarriers.
Hydrodynamic synthesis of Fe2O3@MoS2 0D/2D-nanocomposite material and its application as a catalyst in the glycolysis of polyethylene terephthalate
Authors: Cha Younghyun , Park Yong-Ju , Kim Do Hyun
Published: May 2021

Fe2O3@MoS2 0D/2D-nanocomposite material was synthesized in an aqueous solution using a Taylor–Couette flow reactor.
Heteroatom driven activation and conversion of CO2 using cyclophosphazene based inorganic–organic hybrid nanoporous materials
Authors: Sharma Ruchi , Muhammad Raeesh , Chandra Srivastava Vimal , Mohanty Paritosh
Published: May 2021

Heteroatom driven CO2 conversion to cyclic carbonates with almost 100% conversion and selectivity.
Electrochemical lithium recovery with lithium iron phosphate: what causes performance degradation and how can we improve the stability?
Authors: Wang Lei , Frisella Kathleen , Srimuk Pattarachai , Janka Oliver , Kickelbick Guido , Presser Volker
Published: May 2021

The reason for the capacity fading of LiFePO4 in lithium recovery is explored. And two approaches, reducing the content of oxygen and carbon coating, are put forward, and the mechanism of them are studied.
Textile triboelectric nanogenerators for self-powered biomonitoring
Authors: Lama John , Yau Andy , Chen Guorui , Sivakumar Aditya , Zhao Xun , Chen Jun
Published: May 2021

Textile-based TENGs integrate wearable biomonitoring into commonly worn textiles, offering an inexpensive and convenient alternative with high breathability, wearing comfort, and scalability for personalized healthcare.
Internalization and membrane activity of the antimicrobial peptide CGA-N12
Authors: Li Ruifang , Tao Mengke , Li Shang , Wang Xueqin , Yang Yanhui , Mo Lianfeng , Zhang Kaidi , Wei Ao , Huang Liang
Published: May 2021

Antimicrobial peptides (AMPs) are conventional antibiotic alternatives due to their broad-spectrum antimicrobial activities and special mechanisms of action against pathogens. The antifungal peptide CGA-N12 was originally derived from human chromogranin A (CGA) and consists of the 65th to 76th amino acids of the CGA N-terminal region. In the present study, we found that CGA-N12 had fungicidal activity and exhibited time-dependent inhibition activity against Candida tropicalis. CGA-N12 entered the cells to exert its antagonist activity. The internalization of CGA-N12 was energy-dependent and accompanied by actin cytoskeleton-, clathrin-, sulfate proteoglycan-, endosome-, and lipid-depleting agent-mediated endocytosis. Moreover, the CGA-N12 internalization pathway was related to the peptide concentration. The effects of CGA-N12 on the cell membrane were investigated. CGA-N12 at a low concentration less than 4 × MIC100 did not destroy the cell membrane. While with increasing concentration, the damage to the cell membrane caused by CGA-N12 became more serious. At concentrations greater than 4 × MIC100, CGA-N12 destroyed the cell membrane integrity. Therefore, the membrane activity of CGA-N12 is concentration dependant.
Unique C-terminal extension and interactome of Mycobacterium tuberculosis GlmU impacts its in vivo function and the survival of the pathogen
Authors: Agarwal Meetu , Soni Vijay , Kumar Suresh , Singha Biplab , Nandicoori Vinay Kumar
Published: May 2021

N-acetyl glucosamine-1-phosphate uridyltransferase (GlmU) is a bifunctional enzyme involved in the biosynthesis of Uridine diphosphate N-acetylglucosamine (UDP-GlcNAc). UDP-GlcNAc is a critical precursor for the synthesis of peptidoglycan and other cell wall components. The absence of a homolog in eukaryotes makes GlmU an attractive target for therapeutic intervention. Mycobacterium tuberculosis GlmU (GlmUMt) has features, such as a C-terminal extension, that are not present in GlmUorthologs from other bacteria. Here, we set out to determine the uniqueness of GlmUMt by performing in vivo complementation experiments using RvΔglmU mutant. We found that any deletion of the carboxy-terminal extension region of GlmUMt abolishes its ability to complement the function of GlmUMt. Results show orthologs of GlmU, including its closest ortholog, from Mycobacterium smegmatis, cannot complement the function of GlmUMt. Furthermore, the co-expression of GlmUMt domain deletion mutants with either acetyl or uridyltransferase activities failed to rescue the function. However, co-expression of GlmUMt point mutants with either acetyl or uridyltransferase activities successfully restored the biological function of GlmUMt, likely due to the formation of heterotrimers. Based on the interactome experiments, we speculate that GlmUMt participates in unique interactions essential for its in vivo function.
Low‐leakage zero‐static power consumption analogue CMOS switch
Authors: Sciortino Giuseppe , Mesri Alireza , Toso Fabio , Zanetto Francesco , Ferrari Giorgio
Published: May 2021

The architecture of a low‐leakage switch in complementary metal‐oxide‐semiconductor (CMOS) technology developed to implement long‐term analogue memories for low‐power applications is presented. The switch reduces the leakage current using a cascade of modified pass‐transistors without active circuits, thus producing a negligible power consumption. The technique is simple, modular, robust, and reduces the leakage current down to tens of aA at room temperature using a TSMC 0.18 µm technology.
Using spatio‐temporal deep learning for forecasting demand and supply‐demand gap in ride‐hailing system with anonymised spatial adjacency information
Authors: Rahman Md. Hishamur , Rifaat Shakil Mohammad
Published: May 2021

To reduce passenger waiting time and driver search friction, ride‐hailing companies need to accurately forecast spatio‐temporal demand and supply‐demand gap. However, due to spatio‐temporal dependencies pertaining to demand and supply‐demand gap in a ride‐hailing system, making accurate forecasts for both demand and supply‐demand gap is a difficult task. Furthermore, due to confidentiality and privacy issues, ride‐hailing data are sometimes released to the researchers by removing spatial adjacency information of the zones, which hinders the detection of spatio‐temporal dependencies. To that end, a novel spatio‐temporal deep learning architecture is proposed in this paper for forecasting demand and supply‐demand gap in a ride‐hailing system with anonymised spatial adjacency information, which integrates feature importance layer with a spatio‐temporal deep learning architecture containing 1D convolutional neural network (CNN) and zone‐distributed independently recurrent neural network (IndRNN). The developed architecture is tested with real‐world datasets of Didi Chuxing, which shows that the models based on the proposed architecture can outperform conventional time‐series models (e.g. ARIMA) and machine learning models (e.g. gradient boosting machine, distributed random forest, generalized linear model, artificial neural network). Additionally, the feature importance layer provides an interpretation of the model by revealing the contribution of the input features utilized in prediction.
Room temperature chemical synthesis of Bi2O3 nanoparticles
Authors: Varshney Akash , Khan Jamal Ahmad , Ahmad Irfan , Uddin Imran
Published: May 2021

In this article, room temperature synthesis of Bi2O3 nanoparticles in a single‐pot reaction is reported. The nanoparticles were synthesized by reducing Bi(NO3)3·5H2O with NaBH4 as a reducing agent, SDS and oleic acid as stabilizing agents. The synthesized nanoparticles were characterized using UV‐vis absorption spectroscopy, FTIR spectroscopy, XRD, and HR‐TEM. The crystalline nature of the synthesized nanoparticles was confirmed through XRD and HRTEM data analysis. An average particle size of 14 nm (with quasi‐spherical morphology) and a wide band gap were measured for the synthesized nanoparticles. HRTEM image confirmed a highly crystalline growth at individual nanoparticle level. Dielectric measurement indicates a rapid reduction of both real and imaginary dielectric constants as the frequency increases to higher values. The potential application of the synthesized nanoparticles has been demonstrated in photocatalytic degradation of pollutants present in the industrial waste‐water.
Phase shift control and controller area network assisted proportional resonant control for grid integration of single phase voltage source inverters
Authors: Nirmal S. , Sivarajan K. N. , Jasmin E. A.
Published: May 2021

Grid integration of inverters using renewable sources of energy is essential for providing a secure and clean source of power supply. Many techniques developed so far control the grid current to realize the regulation of power flow to the power grid. However, implementation of communication assisted synchronization methods for single‐phase full‐bridge inverters is not found to be discussed in the literature. The focus of this research is to conceptualize, simulate, and implement two control techniques, namely Phase Shift Control (PSC) and Controller Area Network Assisted Proportional Resonant Control (CANAPRC) for single‐phase inverters. In the PSC method, the inverter injects the desired real power into the grid by controlling the phase angle between converter and grid voltages. A low complexity synchronization procedure was adopted using single‐phase PLL to generate a reference voltage signal using the PSC method. In contrast, the CANAPRC method outputs a current reference created by the resonant controller using a communication network. The inverter can pump the required real and reactive power to the grid with reduced harmonics, enhanced power‐sharing and transient stability using the two strategies. Simulations in MATLAB R2016a analyze the two models out effectively. Prototype models validate the proposed control strategies.
Thermal management of grid‐tied PV system: A novel active and passive cooling design‐based approach
Authors: Hammad Waleed , Sweidan Tha'er O. , Abuashour Mohammed I. , Khalid Haris M. , Muyeen S. M.
Published: May 2021

The photovoltaic (PV) cells are highly sensitive to temperature variations. The linear variation of PV cells with operating temperature could lead to the loss of conversion efficiency and permanent damage of PV material. To address this critical issue, while improving the performance of solar photovoltaic system (SPVS) during the operating period, the deployment of a proper cooling system is a prime requisite in the design process. Considering this, two new and cost‐effective cooling techniques are proposed in this study, which can improve efficiency and increase the life of the PV panel. The first technique is the active cooling design with water. The proposed design enhances the access to PV cells to maximize cooling. The second one is an improved passive cooling technique that uses fins mounted on the backside of PV module. This further reduces the temperature by increasing the heat dissipation. Additionally, a third PV module without any cooling system is deployed as a reference margin. The techniques have been experimentally evaluated and a recommendation is made in order to reduce the temperature variation across the PV panel.
Formulation of a wind farm control strategy considering lifetime of DC‐link capacitor bank of type IV wind turbines
Authors: Nayanasiri Dulika , Li Yunwei
Published: May 2021

The cost of energy should be minimised to increase market penetration of wind energy conversion systems. The existing wind farm control strategies are not helpful since they speed up the damage in upstream wind turbines. Therefore, a control strategy is proposed to maximise the energy yield while equalising lifetime of one of the most fragile sub‐system of the wind turbines. The DC‐link capacitor bank of the back‐to‐back converters is considered to this end. The proposed control strategy can be directly applied in systems based on type 4 wind turbines with full power converters. This exposition reveals the formulation of the control strategy by analysing the strengths and weaknesses of the existing strategies based on the maximum power output. The lifetime‐based control strategy is extended to formulate a multi‐stage reactive power dispatch method with the help of a total energy‐based strategy. The effectiveness of all control strategies is validated using the model‐based simulations.
Main‐lobe jamming suppression and target detection in signal ratio feature domain for multistatic radar
Authors: Zhao Shanshan , Liu Ziwei
Published: May 2021

Main‐lobe blanket jamming is a challenging jamming pattern in electronic warfare. Based on the difference in spatial correlation between target echoes and jamming signals, signal cancellation has been used to suppress the main‐lobe jamming in multistatic radar. However, the cancellation residue and the extra superimposed noise would lead to serious degradation in target detection. In this paper, instead of cancelling the jamming in the power domain, a feature domain, named signal ratio feature domain, is defined to suppress main‐lobe jamming with the excepted targets retained simultaneously. The jamming signal is suppressed in the background due to the high correlation among different receivers, whereas the targets will be highlighted on account of its independence. Then, in the defined feature domain, a target detector with constant false alarm ratio in the Neyman–Pearson sense is applied to detect the highlighted targets. Numerical simulation is given to verify the jamming suppression ability of the proposed method, and the performance improvement in target detection compared with the available cancellation methods is also covered.
Why Service Science matters in approaching a "resilient" Society
Authors: Polese Francesco , Drăgoicea Monica , Carrubbo Luca , Walletzký Leonard
Published: May 2021

The Service Science lens favours a transdisciplinary approach to the study and interpretation of a huge number of phenomena. This article explores the applicability of this lens in understanding how resilience can emerge as a characteristic of the service systems at a city, or a district, region, or society level. This paper argues that by matching insights from the Service Science perspective with recent advances in System Thinking, a common and cross-cultural interpretation on resilience may arise, focusing on empirical grounds, fundamental pillars for every country. The paper reviews the understanding of resilience using four macro areas, to specify "where" the resilience’s transdisciplinary roots can be traced. We are formulating four main assumptions based on the ten foundational concepts of Service Science. Further, we argue how these assumptions can really help in understanding, from a multidisciplinary point of view, how different competences and perspectives foster resiliency in Smart cities. We propose a new service design artefact, the Smart Service Model Canvas (SSModC), as a tool for designing, realizing, and maintaining Smart City services. We apply this new tool in a case study to demonstrate some aspects of special services in Smart cities that resilient entities should have and acquire. Our findings may help in addressing the challenge of resilient and sustainable services, as a response for the cognitive resilience of Society in its induced progression. Therefore, they may constitute common knowledge for city management entities in developing complex services with multiple value propositions.
A Service Science Perspective on Resilience of Service Organisations
Authors: Le Dinh Thang , Thi Thanh Thoa Pham , Dam Nguyen Anh Khoa , Menvielle William
Published: May 2021

Nowadays, different types of unexpected turbulence and disruptions lead to challenges and changing conditions of the environment that organisations operate. The previous studies related to crisis response or service recovery have addressed many aspects of the governance of an organisation in reacting to crisis or failure situations, including innovation and bureaucracy, science and politics, and decision-making speed. However, there is still little attention on supporting service organisations to revise and adapt their business services in a coherent manner to overcome the challenges from disruptive events. In order to improve organisational resilience, this paper presents an approach based on the service science perspective for service organisations to adapt their services at the three levels of service science, including the network of service systems, service system, and service levels. The paper also presents a case study of using the proposed approach in cultural organisations and ends with a discussion and some conclusions.
Service Development for Progression of Dance
Authors: Yurchyshyna Anastasiya
Published: May 2021

This research explores transdisciplinary knowledge, skills, motivations, values, deep expectations of all members of Society interested in Dance, in order to integrate established knowledge on development of services and information systems with the exploration of the progression of Dance in an open environment of digital innovation, initiatives management, social networking, crowdsourcing and public engagement. This leads to identifying the innovative ideas for resilient and sustainable progression of Dance in the situation of pandemic and to developing a myriad of services assisting this progression. This research is oriented towards service development, by identifying innovative ideas aiming at the progression of Dance in the situation of pandemic, concretising them as information common goods and organising them as informational commons, in order to actionalise them as contributory services. To support the development of services in a sustainable and responsible way, it suggests to develop a protected place adapted to co-construction of information services, Tiers-Lieux for Services (TLS), which allows identifying added value of all initiatives, so that responsible and interested persons could all actively participate in actionalising the created added value for the development of dance-related services.
Research on corrosion mechanism of refractory lining in drip zone of COREX melting gasifier
Authors: Wang Xiaoge , Li Pengcheng , Sun Huili , Song Shitao
Published: May 2021

In this paper, the COREX-3000 melting gasifier was dissected and sampled to obtain the macroscopic erosion appearance of refractories lining in the drip zone, and the erosion behavior and mechanism of refractory bricks in the drip zone were analyzed by means of chemical analysis, XRD, SEM and determination of physical characteristics. The results showed that the maximum average erosion of refractory lining bricks in the drip zone was 220 mm and the erosion rate was up to 69%. Its surface was mainly affected by slag erosion and mechanical scour of slag, but at high temperature, the surface of refractory could be re-sintered, forming a protective layer, which improved the volume density and high compressive strength of refractory, which was advantageous to the improvement of refractory brick slag resistance invasion and mechanical erosion resistance. Relevant research results can provide theoretical basis for the selection of refractories lining in the drip zone of COREX melting gasifier.
Temperaturmessung
Authors: Diemer Frank
Published: May 2021

Palpieren ist gut – Messen ist besser: Eine erhöhte Hauttemperatur kann Zeichen gesteigerter Stoffwechselprozesse sein und eignet sich daher gut, den Heilungsverlauf nach chirurgischen Eingriffen und Verletzungen zu beurteilen. Doch dabei ist manches zu beachten, damit man nicht die falschen Schlüsse zieht.
Advanced Adrenocortical Carcinoma: Current Perspectives on Medical
Treatment
Authors: Araújo Alexandra Novais , Bugalho Maria João
Published: May 2021

Adrenocortical carcinoma (ACC) is a rare and aggressive malignancy. For stage I
and II tumors, surgery is a curative option, but even in these cases recurrence
is frequent. Practical guidelines advocate a combination of mitotane with
etoposide, doxorubicin, and cisplatin as first-line therapy for metastatic
adrenocortical carcinoma. However, this scheme presents limited efficacy and
high toxicity. The use of Immune Checkpoint Inhibitors (ICI) and multi-Tyrosine
Kinase Inhibitors (mTKI) has modified the approach of multiple malignancies. The
expectation of their applicability on advanced adrenocortical carcinoma is high
but the role of these new therapies persists unclear. This article provides a
short summary of last years’ findings targeting outcomes, limitations,
and adverse effects of these new therapeutic approaches. The results of recent
trials and case series pointed pembrolizumab as the most promising drug among
these new therapies. It is the most often used ICI and the one presenting the
best results with less related adverse effects when in comparison to the
standard treatment with mitotane. Hereafter, the identification of specific
molecular biomarkers or immune profiles associated with ICI or mTKI good
response will facilitate the selection of candidates for these therapies. So
far, microsatellite instability and Lynch Syndrome related germline mutations
are suggested as predictive biomarkers of good response. Contrarywise, cortisol
secretion has been associated with more aggressive ACC tumors and potentially
poor responses to immunotherapy.
Time evolution of vortex rings with large radius and very concentrated vorticity
Authors: Cavallaro Guido , Marchioro Carlo
Published: May 2021

We study the time evolution of an incompressible fluid with an axial symmetry without swirl when the vorticity is sharply concentrated on N annuli of radii ≈r0 and thickness ɛ. We prove that when r0 = |log ɛ|α, α > 2, the vorticity field of the fluid converges as ɛ → 0 to the point-vortex model, at least for a small but positive time. This result generalizes a previous paper that assumed a power law for the relation between r0 and ɛ.
Boltzmann's colloidal transport in porous media with velocity-dependent capture probability
Authors: Russell Thomas , Bedrikovetsky Pavel
Published: May 2021

Mathematical modeling of suspension-colloidal-nano transport in porous media at different scales has long been a fascinating topic of fluid mechanics. In this study, we discuss the multi-pore scale, where Boltzmann's approach of distributed velocities is valid, and average (homogenize) the micro-scale equation up to the core scale. The focus is on the filtration function (particle capture probability per unity trajectory length) that highly depends on the carrier fluid velocity. We develop a modified form of the Boltzmann equation for micro-scale particle capture and diffusion. An equivalent sink term is introduced into the kinetic equation instead of non-zero initial data, resulting in the solution of an operator equation in the Fourier space and an exact homogenization. The upper scale transport equation is obtained in closed form. The upscaled model contains the dimensionless delay number and large-scale dispersion and filtration coefficients. The explicit formulas for the large-scale model coefficients are derived in terms of the micro-scale parameters for any arbitrary velocity-dependent filtration function. We focus on three micro-scale models for the velocity-dependent particle capture rate corresponding to various retention mechanisms, i.e., straining, attachment, and inertial capture. The explicit formulas for large-scale transport coefficients reveal their typical dependencies of velocity and the micro-scale parameters. Treatment of several laboratory tests reveals close match with the modeling-based predictions.
A dual-magneto-optical-trap atom gravity gradiometer for determining the Newtonian gravitational constant
Authors: Mao De-Kai , Deng Xiao-Bing , Luo Hua-Qing , Xu Yao-Yao , Zhou Min-Kang , Duan Xiao-Chun , Hu Zhong-Kun
Published: May 2021

As part of a program to determine the gravitational constant G using multiple independent methods in the same laboratory, an atom gravity gradiometer is being developed. The gradiometer is designed with two magneto-optical traps to ensure both the fast simultaneous launch of two atomic clouds and an optimized configuration of source masses. Here, the design of the G measurement by atom interferometry is detailed, and the experimental setup of the atom gravity gradiometer is reported. A preliminary sensitivity of 3 × 10−9 g/Hz to differential gravity acceleration is obtained, which corresponds to 99 E/Hz (1 E = 10−9 s−2) for the gradiometer with a baseline of 0.3 m. This provides access to measuring G at the level of less than 200 parts per million in the first experimental stage.
Ultra-low supply voltage crystal quartz oscillator
Authors: Korolev A. M. , Shulga V. M. , Turutanov O. G.
Published: May 2021

In this paper, an ultra-low-voltage crystal quartz oscillator is proposed. The design of the proposed oscillator is essentially based on using a HEMT operating in an unsaturated dc regime and a quartz resonator as a resonant impedance transformer. The 25 MHz prototype shows steady oscillations at the supply voltage of less than 17 mV and the power consumption as low as 300 nW, i.e., 1–2 orders of magnitude lower than the other to-date oscillators. This approach is good for building ultra-low consumption radio devices including those working at low temperatures.
Measurement performance assessment for the ITER CXRS Edge diagnostic system
Authors: Serov S. V. , De Bock M. , von Hellermann M. G. , Tugarinov S. N.
Published: May 2021

Measurement performance assessment has been carried out for the latest design of the ITER Charge Exchange Recombination Spectroscopy (CXRS) Edge diagnostic system. Several plasma scenarios, covering all expected baseline operation regimes for ITER, were used. Various impurity (He, Be, C, and Ne) concentrations for the system whole spatial range (0.5 < r/a < 1.0) were considered. Statistical errors for the measurements of low-Z impurity temperature, density, and rotation velocity were calculated. Other non-statistical error sources were reviewed, including the presence of wall reflections, effects on the active charge-exchange line shape, calibration, and positioning uncertainties. Minimal impurity concentrations, allowing measurements with required accuracy, were obtained. It was shown that the CXRS Edge system will be able to measure primary plasma parameters with required accuracy, space, and time resolution.
Functionalization of graphene by boronic acid-based organic molecules
Authors: Ersu Gulsum , Gunes Fethullah , Gokpek Yenal , Can Mustafa
Published: May 2021

In this paper, synthesis of high-quality large area graphene and alteration of its electrical properties by a non-covalent doping method via boronic acid-based organic small molecules were reported. A chemical vapor deposition method was used for large area graphene synthesis. In order to modify electrical properties of graphene, 3,5-difluorophenyl boronic acid and 3,4,5-trimethoxyphenyl boronic acid organic molecules have been used. The structural data and the energy level of molecules were obtained from density functional theory-based computational simulations. The electrical properties of doped and undoped graphene films were examined by Hall-effect measurement. It has been found that the density of charge carrier changes after doping due to the nature of molecules. Our results show that the electrical properties of graphene can effectively be manipulated via doping by phenylboronic compounds opening possibilities of application in electronics and optoelectronics for graphene.
A large and anisotropic enhancement of the mechanical quality factor in ternary relaxor-PbTiO3 single crystals
Authors: Jing Yujia , Zheng Limei , Liu Fengying , Qi Xudong , Jiang Guicheng , Fan Jinhui , Liu Gang , Lü Weiming
Published: May 2021

Enhancing the mechanical quality factor, Qm, in ferroelectrics is one of the most critical issues for high-power devices, such as therapeutic ultrasonic transducers, large-displacement actuators, and high-frequency transducers. Although previous results have indicated that Qm could be improved through acceptor doping, the mechanism behind this effect is still a mystery, and there have been few reports on the optimization of energy loss in ultrahigh piezoelectric materials such as relaxor-PbTiO3 (PT) single crystals. In this work, we investigate the energy loss associated with various vibration modes in Mn-doped Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 (PIN–PMN–PT:Mn) single crystals and compare with their undoped PIN–PMN–PT counterpart. We find that Q15, Q24, and Q33 in PIN–PMN–PT:Mn, respectively, undergo 160%, 100%, and 80% enhancements, thus demonstrating very large extrinsic contributions with unusual anisotropies in the Qm enhancement. Such a strong anisotropy is strongly interlinked with the orientation of the internal bias Ei and the charged domain walls. Our results provide some fundamental understanding of domain-engineered ferroelectric materials and materials-by-design for high-performance low-loss devices.
In-plane anisotropic Raman response of layered In2Te5 semiconductor
Authors: Zhou Yulan , Wang Weike , Li Liang , Gong Penglai , Tang Dongsheng
Published: May 2021

This work presents a systematic study of phonon modes in Indium tellurides (In2Te5), a member of Pentatelluride M2Te5, where M = Al, Ga, and In, by Raman spectroscopy. We demonstrated the strong anisotropic Raman response for linearly polarized excitation, and the eight detected Raman characteristic peaks were further revealed by density functional perturbation theory calculations. All Raman mode shifts exhibit a linear temperature dependence. The first-order temperature coefficient (χ) of the In2Te5 Raman mode ranges from –0.00444 to –0.01557 cm−1/K. Our results shed light on phonon vibrational properties of In2Te5, attracting future research interest in group III–VI layered semiconductors.
Development of a thin high-frequency and high-precision magnetic probe array in Sino-United Spherical Tokamak
Authors: Cheng Zhengbo , Tan Yi , Gao Zhe , Wang Shouzhi , Wang Binbin , Liu Wenbin
Published: May 2021

Since the major/minor radius of the Sino-United Spherical Tokamak (SUNIST) is 0.3/0.23 m, respectively, the space left for magnetic diagnostics in the high field side (HFS) is quite limited. At the same time, a good signal-to-noise ratio and a high-frequency response (up to 1 MHz) are required for equilibrium reconstruction (ER) and Alfven eigenmode studies. Such a magnetic probe array must be extremely thin and tightly close to the central column, not exceeding the inner limiter and leaving the aspect ratio of the spherical tokamak unchanged. Therefore, the turn number and the shape of windings should be highly optimized to enable both a high-frequency response and an enough effective area. A 32-channel magnetic probe array fulfilling these requirements on the central column is designed, calibrated, and installed in the SUNIST. The array consists of 16 probes. Each of them consists of two perpendicular windings, which can measure toroidal and poloidal magnetic fields simultaneously. The effective area and frequency response of each probe are calibrated using a Helmholtz coil and an LCR bridge based on an equivalent probe-and-cable circuit model. After that, an expression of the magnetic diagnostic response to the field coil currents is used to calibrate the installation error. With the full coverage of magnetic probes in the poloidal direction, more reliable ER can be obtained, and the features of magnetohydrodynamic activities in the HFS can be studied.
Simulations of wavelength-multiplexed holography for single-shot spatiotemporal characterization of NIF’s advanced radiographic capability (ARC) laser
Authors: Grace E. , Ma T. , Guang Z. , Alessi D. , Herriot S. , Rhodes M. , Park J. , Trebino R.
Published: May 2021

We simulate the use of a newly developed single-shot wavelength-multiplexed holography-based diagnostic, STRIPED FISH, to fully characterize the as-delivered laser pulses of the National Ignition Facility’s Advanced Radiographic Capability (NIF-ARC) laser. To that end, we have performed simulations of the NIF-ARC pulse incorporating (a) a time-integrated spatial-profile measurement and a complete temporal-intensity-and-phase measurement using a frequency resolved optical gating, but without any spatiotemporal pulse characterizations, and (b) simulated first-order spatiotemporal distortions, which could be measured on a single shot if a STRIPED FISH device were deployed.
A 6.78-MHz distance-insensitive wireless power transfer system with a dual-coupled L-type matching network
Authors: Han Gao , Liu Yanming , Li Qian , Xing Zikang , Zhang Zheng
Published: May 2021

A 6.78-MHz wireless power transfer (WPT) system can achieve a long transmission distance, which is based on magnetically coupled resonant technology. Due to its high quality factor coils, the system performance is greatly affected by position displacement. In this paper, a weakly coupled and distance-insensitive WPT system with a dual-coupled L-type matching network was proposed. To improve displacement tolerance, the proposed system used a dual mutual inductance matching network, which did not require feedback to change capacitance or inductance dynamically. To remain lightweight, printed multi-coils without ferrites were used. To obtain a higher efficiency over a weakly coupled distance, a series of parameters were optimized, i.e., the optimal dimension, the matching distance, and the real center. To verify the output performance in X/Y/Z-axis displacements, a prototype with a maximum output power of 50 W was created, and a DC–DC efficiency of 75%–81% was achieved in a Z-axis displacement of ±15 mm and in an X/Y-axis displacement of ±20 mm.
Research on unknown fault diagnosis of rolling bearings based on parameter-adaptive maximum correlation kurtosis deconvolution
Authors: He Yong , Wang Hong , Xue Hai , Zhang Tao
Published: May 2021

Maximum correlation kurtosis deconvolution (MCKD) is an effective means of identifying the periodic impulses of fault signals. However, the multiple input parameters required by MCKD complicate the process of fault diagnosis. To overcome this drawback, a new method for identifying fault types based on a parameter-adaptive MCKD method is proposed. First, an improved adaptive variational mode decomposition is developed to denoise the raw signal. The improved method adopts the weighted envelope entropy, which is constructed by combining the envelope entropy with the kurtosis, allowing the salience of the denoising performance to be evaluated. Furthermore, the mean maximum correlation kurtosis is constructed to allow the specification of fault types and the corresponding parameters. Finally, two rolling bearing test datasets are used to demonstrate the strong adaptability of this method compared with other adaptive techniques.
Noise characterization and compensation for a charge-coupled-device-based pyrometer
Authors: Zhang Yuzhong , Lu Fucheng , Wang Wenjing , Shu Shuangbao , Dong Jingtao , Tao Xiaojie
Published: May 2021

The pyrometer based on the charge coupled device (CCD) is a cost-effective and widely used system for temperature measurement in various industrial fields. However, due to the inter-element sensitivity deviations of the CCD-array detector and the influence of various types of noise, the digital signal output of the CCD sensor itself is not completely equal to the ideal value as expected. In this work, based on a classical calibration method, the inter-element sensitivity deviations, dark current, shot noise, and readout-quantization noise for a CCD-based pyrometer are characterized, and the influence of these noises on the temperature measurement accuracy is evaluated quantitatively. Furthermore, the non-uniformity correction coefficient for each pixel is obtained by a simple segment correction method to reduce the inter-element sensitivity deviations, and meanwhile, the Kalman filter is introduced to remove the temperature fluctuations caused by these noises. Experimental results show that mean value of the spatial standard deviation of temperature measurement results in the total measurement range (800–1200 °C) is only 2.2 °C after non-uniformity correction, and the temperature fluctuations can be reduced from 26.6 to 1.98 °C based on the Kalman filter.