bluuebunny/crossref_metadata_2025 huggingface dataset:
Increased attention allocation to stimuli reflecting end-states of compulsive behaviors among obsessive compulsive individuals
Authors: Basel Dana , Magen Moriah , Lazarov Amit
Published: July 2023

Attentional research in OCD has focused solely on threat stimuli, assumed to provoke related obsessions and ensuing compulsions. OCD-related stimuli depicting the completion of compulsive acts (“end-states”) have yet to be examined. Past research also neglected to explore the reliability of tasks used. Here, attention allocation to both stimuli types was examined. Participants with high (HOC) and low (LOC) levels of obsessive–compulsive symptoms freely viewed three blocks of 30 two-by-two picture matrices, each including two OCD-related (cleaning\checking\ordering) and two neutral pictures, presented for eight seconds, while their gaze was recorded. Participants completed two task versions – one with traditional threat stimuli and one with novel stimuli signaling compulsions end-states. Only the end-state version yielded significant results, showing that HOC participants, compared to LOC participants, spent significantly more time fixating on OCD-related stimuli. Results remained significant after controlling for anxiety, stress, and depression. Task reliability was high. OCD-related stimuli signaling end-states of compulsive behavior should be incorporated in attentional research in OCD.
Magnetically anisotropic hydrogels for tissue engineering
Authors: Hao Lili , Mao Hongli
Published: July 2023

The magnetically anisotropic structure confers unique properties and promising application prospects to hydrogels in tissue engineering.
Thermal atomic layer deposition of Er2O3 films from a volatile, thermally stable enaminolate precursor
Authors: Jayakodiarachchi Navoda , Liu Rui , Dharmadasa Chamod D. , Hu Xiaobing , Savage Donald E. , Ward Cassandra L. , Evans Paul G. , Winter Charles H.
Published: July 2023

The thermal atomic layer deposition of Er2O3 thin films is presented using an erbium(iii) enaminolate precursor and water. High purity films result and perfect conformal film coverage is obtained in nanoscale trenches.
Interface synthesis of Cu-BTC/PVDF hybrid membranes and their selective adsorption activity toward Congo red
Authors: Hu Defeng , Sun Zhongqiao , Han Yide , Meng Hao , Zhang Xia
Published: July 2023

An interface synthesis strategy is used to construct Cu-BTC/PVDF hybrid membranes with dense Cu-BTC inside the PVDF pores, which show extraordinary adsorption capacity toward Congo red.
Correction: Catalytic exploration of NHC–Ag(i)HMDS complexes for the hydroboration and hydrosilylation of carbonyl compounds
Authors: Giarrusso Claudia P. , Van Zeil Daniel , Blair Victoria L.
Published: July 2023

Correction for ‘Catalytic exploration of NHC–Ag(i)HMDS complexes for the hydroboration and hydrosilylation of carbonyl compounds’ by Claudia P. Giarrusso et al., Dalton Trans., 2023, 52, 7828–7835, https://doi.org/10.1039/D3DT01042B.
Interaction of TiO2 nanoparticles with lung fluid proteins and the resulting macrophage inflammatory response
Authors: Poulsen Karsten M. , Albright Michaela C. , Niemuth Nicholas J. , Tighe Robert M. , Payne Christine K.
Published: July 2023

The interaction of titanium dioxide nanoparticles with lung lining fluid results in a unique protein corona on the surface of the nanoparticles. This protein corona leads to the elevated expression of cytokines associated with lung inflammation.
A metal organic framework decorated 2-dimensional nanomaterial based nanocomposite photocatalyst for photocatalytic degradation of dyes from textile industry wastewater
Authors: Sonawane Amol Vijay , Murthy Z. V. P.
Published: July 2023

The MIL-101(Cr) functionalized h-BN and TiO2 based photocatalytic PVDF MMMs are used for dye removal from textile industry wastewater. The h-BN/MIL-101(Cr)/PVDF MMMs show significant removal of dyes from textile industry wastewater.
Proline pre-conditioning of Jurkat cells improves recovery after cryopreservation
Authors: Murray Alex , Kilbride Peter , Gibson Matthew I.
Published: July 2023

T-cells incubated with proline have superior recovery following cryopreservation, increasing cell yields without changing the actual cryopreservation process.
Integrating the atomically separated frontier molecular orbital distribution of two multiple resonance frameworks through a single bond for high-efficiency narrowband emission
Authors: Chen Meng-Yuan , Huang Feng , Wu Hao , Cheng Ying-Chun , Wang Hui , Hu Ya-Nan , Fan Xiao-Chun , Yu Jia , Wang Kai , Zhang Xiao-Hong
Published: July 2023

Two isomeric emitters are developed by connecting two multiple resonance (MR) frameworks via a single bond. The connection following the resonance alignment enhances atomic frontier molecular orbital separation, resulting in narrower emission.
Chemical potential gradient induced formation of Kirkendall voids at the epitaxial TiN/MgO interface
Authors: Zhang Xiaoman , Meng W. J. , Meng Andrew C.
Published: July 2023

We report the observation of Kirkendall voids at the epitaxial titanium nitride (TiN)/magnesium oxide(MgO)(001) interface.
Environmentally friendly Nafion-catalyzed synthesis of 3-substituted isoquinoline by using hexamethyldisilazane as a nitrogen source under microwave irradiation
Authors: Lin Tzu-Chun , Chan Chieh-Kai , Chung Yi-Hsiu , Wang Cheng-Chung
Published: July 2023

An eco-friendly method for the synthesis of 3-arylisoquinoline from ethylenealdehyde by using Nafion® NR50 under microwave irradiation conditions.
Double asymmetric synthesis: faster reactions are more selective and a model to estimate relative rate
Authors: Richards Christopher J. , Stephen Ojo O.
Published: July 2023

Kinetic resolutions resulting in a new stereogenic centre were used to establish that in double asymmetric synthesis the faster reaction is more selective. The relative rate is estimated by a model using substrate (x) and catalyst (y) selectivities.
Catalyst-controlled stereoselective carbon–heteroatom bond formations by N-heterocyclic carbene (NHC) organocatalysis
Authors: Wang Yanyan , Liu Yonggui , Zhao Sha , Long Yijie , Wu Xingxing
Published: July 2023

This review highlights recent advances in stereoselective carbon–heteroatom bond forming reactions, including C–N, C–O, C–S, C–F, C–P, etc., that were enabled by NHC organocatalysis with a focus on new activation modes and reactive intermediates.
N-Doped porous carbons obtained from chitosan and spent coffee as electrocatalysts with tuneable oxygen reduction reaction selectivity for H2O2generation
Authors: Wittmar Alexandra S. M. , Vigneswaran Thaarmikaa , Ranković Nikola , Hagemann Ulrich , Hartmann Nils , Martínez-Hincapié Ricardo , Čolić Viktor , Ulbricht Mathias
Published: July 2023

Nitrogen-doped porous carbons prepared by the pyrolysis of coffee and chitosan have shown potential for electrochemical applications like H2O2selective generation.
Anisotropic crystal orientations dependent mechanical properties and fracture mechanisms in zinc blende ZnTe nanowires
Authors: Islam A. S. M. Jannatul , Islam Md. Sherajul , Hasan Md. Sayed , Hosen Kamal , Akbar Md. Shahadat , Bhuiyan Ashraful G. , Park Jeongwon
Published: July 2023

The orientations of crystal growth significantly affect the operating characteristics of elastic and inelastic deformation in semiconductor nanowires (NWs).
Atomic scale analysis of Zn2+ storage in robust tunnel frameworks
Authors: Zhu Kaiyue , Wang Hongxin , Jiang Weikang , Xie Weili , Li Xu , Jia Zhenghao , Yang Weishen
Published: July 2023

A rapid and reversible Zn2+ insertion/extraction process is achieved in MoVTe oxide with the M1 phase owing to the broad tunnels and robust structure. Moreover, Zn2+ insertion along with the solvent water into the tunnels is demonstrated and observed at the atomic scale for the first time.
NIR light, pH, and redox-triple responsive nanogels for controlled release
Authors: Chen Shuo , Yuan Shuai , Bian Qing , Wu Bo
Published: July 2023

A novel spiropyran-based organic–inorganic composite nanogel was prepared by upconverting nanoparticles, spiropyran, acrylic acid and N,N′-bis(acryloyl)cystamine compounds under emulsion polymerisation. Under NIR light, pH 6, and 4 mM reducing agent, the loaded drug was released more efficiently.
Novel approach for sparse aperture inverse synthetic aperture radar imaging via improved alternating direction method of multipliers algorithm
Authors: Yang Jiaxing , Wang Yong , Ma Yu
Published: July 2023

As a new algorithm to achieve sparse aperture inverse synthetic aperture radar (SA‐ISAR) imaging, the alternating direction method of multipliers (ADMM) suffers from selection of model parameters and the inability to discriminate the target and non‐target components. Therefore, an improved ADMM (I‐ADMM) algorithm is proposed to solve these problems. First, the particle swarm optimisation (PSO) algorithm is utilised to obtain the optimal model parameters. Aiming to adequately preserve the target's shape information in the ISAR image, a modified image entropy (IE) is proposed to be the objective function of the PSO. Then, a new regularisation function is obtained from the ADMM based ISAR image. The proposed algorithm can enhance the target components and suppress the non‐target components by utilising the regularisation function. Finally, results based on the simulated and measured data show that the proposed I‐ADMM algorithm not only achieves at least 9.4% improvement in IE but also greatly improves the image quality as visually compared with the traditional ADMM algorithm which validates the effectiveness and superiority of the proposed algorithm. [Correction added on 13/09/23, after first online publication: In the following sentence in abstract “Finally, results based on… the proposed algorithm.” 10% was changed as 9.4%.]
Reconnection-driven flares in 3D black hole magnetospheres
Authors: El Mellah I. , Cerutti B. , Crinquand B.
Published: July 2023

Context. Low-luminosity supermassive and stellar-mass black holes (BHs) may be embedded in a collisionless and highly magnetized plasma. They show nonthermal flares indicative of particles being accelerated up to relativistic speeds by dissipative processes in the vicinity of the BH. During near-infrared flares from the supermassive BH Sagittarius A* (Sgr A*), the GRAVITY Collaboration detected circular motion and polarization evolution, which suggest the presence of transient synchrotron-emitting hot spots moving around the BH.

Aims. We study 3D reconnecting current layers in the magnetosphere of spinning BHs to determine whether plasma-loaded flux ropes which are formed near the event horizon could reproduce the hot spot observations and help constrain the BH spin.

Methods. We performed global 3D particle-in-cell simulations in Kerr spacetime of a pair plasma embedded in a strong and large-scale magnetic field originating in a perfectly conducting disk in prograde Keplerian rotation.

Results. A cone-shaped current layer develops which surrounds the twisted open magnetic field lines threading the event horizon. Spinning magnetic field lines coupling the disk to the BH inflate and reconnect a few gravitational radii above the disk. This quasi-periodic cycle accelerates particles, which accumulate in a few macroscopic flux ropes rotating with the outermost coupling magnetic field line. Once flux ropes detach, they propagate in the current layer following what appears as a rapidly opening spiral when seen face-on. A single flux rope carries enough relativistic electrons and positrons to emit synchrotron radiation at levels suitable to reproduce the peak-luminosity of the flares of Sgr A* but it quickly fades away as it flows away.

Conclusions. Our kinematic analysis of the flux ropes motion favors a BH spin of 0.65 to 0.8 for Sgr A*. The duration of the flares of Sgr A* can only be explained provided the underlying magnetic loop seeded in the disk mid-plane has a finite lifetime and azimuthal extension. In this scenario, the hot spot corresponds to a spinning arc along which multiple reconnection sites power the net emission as flux ropes episodically detach.
Service in the humanity-centered AI era: Some thoughts and reflections
Authors: Spohrer Jim
Published: July 2023

This article captures some thoughts and reflections on the topic of “service in the humanitycenter AI era” presented Friday February 17th, 2023, in an online invited presentation to attendees of the 13thInternational Conference on Exploring Service Science (IESS 2.3) being held in Geneva, Switzerland [1]. A hoped-for promise of AI as a technology is to bring productivity and quality increases to what economists call the service sector, as previous generations of technology did for agriculture and manufacturing. Both service science and artificial Intelligence (AI) have made significant progress as communities of practice and academic disciplines in their respective, 20 years and nearly 70 years histories. Nevertheless, both AI and service science still have a long way to go to achieve their potential for transdisciplinary harmonization. Responsible actors, informed by progress in these two disciplines, are upskilling and learning to invest more systematically and wisely in improved win-win interaction and change for all stakeholders to get and give trusted service.
Enabling Business Analytics in SMEs: The Trivi Open-source System
Authors: Le Dinh Thang , Vu Thi My Hang
Published: July 2023

The purpose of this project is to propose an open-source system, called the Trivi system, for enabling business analytics in small and medium-sized enterprises (SMEs). The paper presents the key activities of the project development, including problem identification and motivation, objective definition, design and development, demonstration, and evaluation. The project’s main outcomes are a knowledge development process, a set of use cases related to business analytics techniques in SMEs, and a general architecture for business analytics systems. Moreover, a four-level service architecture (data, information, analytics, and decision services) of the Trivi system is proposed, and a case study about the first validation for the cultural sector is presented.
People-first PPPs for Services (4PS): A possible way of developing society
Authors: Léonard Michel
Published: July 2023

The digital technologies and systems have considerable impacts on the development of entities, countries, and society. More than just finding solutions, they support the considerable expansions of human activities to observe critical situations of development and overcome them. To face up to these expansions, following service science, development is based on service ecosystems with an informational infrastructure comprising an information base, organizational and digital architectures. All activities of development are multidisciplinary, multi-institutional, multinational, and, what’s more, they combine many aspects, societal, digital, political, legal, ethical. Despite their heterogeneity, the private-public partnership for services (4PS) provides them with a framework to foster efficiency, cognitive unity, and identity. Finally, this approach enables a clear picture of how the development and its outcomes are democratic, inclusive, responsible, and accountable.
del Nido versus St. Thomas Cardioplegia Solutions: A Single-Center Retrospective Analysis of Post Cross-Clamp Defibrillation Rates
Authors: Buel Shane T. , Striker Carrie Whittaker , O'Brien James E.
Published: July 2023

There are many cardioplegia solutions currently in use for pediatric cardiopulmonary bypass (CPB). The most common being del Nido solution. Another common cardioplegia solution used for pediatric CPB is St. Thomas. In October 2014, Children's Mercy Kansas City changed from the use of modified St. Thomas to del Nido. This study compared rates of post cross-clamp fibrillation requiring defibrillation between del Nido solution and modified St. Thomas solution stratified by weight at Children's Mercy Kansas City. This retrospective study consisted of 394 patients who underwent cardiac surgery requiring cardioplegia between January 1, 2014 and July 31, 2015. The outcome measured was defibrillation upon cross-clamp removal. Statistical significance was determined using Fishers exact test with a two-sided significance level of .05. Incidence of defibrillation post cross-clamp removal was 4.4% in the del Nido group and 26.8% in the St. Thomas group (p< .0001). Analysis by weight stratifications displays a reduction in post cross-clamp defibrillation rates in groups using the del Nido solution. The 0- to 6-kg category had an incidence of fibrillation of 1.23% in the del Nido group and 17.5% in the St. Thomas group (p< .0003). The 6- to 15-kg category had an incidence of defibrillation of 1.82% in the del Nido group and 14% in the St. Thomas group (p< .0198). The 15- to 60-kg category had an incidence of defibrillation of 8.9% in the del Nido group and 61% in the St. Thomas group (p< .0001). The >60-kg category had an incidence of defibrillation of 16.7% in the del Nido group and 63% in the St. Thomas group (p< .0623). This study demonstrates a 6-fold decrease in the overall rate of defibrillation post cross-clamp removal between St. Thomas and del Nido cardioplegia solutions. Analyses of weight stratifications demonstrate a decrease in the rate of defibrillation post cross-clamp removal in all categories within the del Nido group.
Cold Agglutinin Autoantibodies in a Patient without a Visible Coronary Sinus Ostium: Strategies for Myocardial Protection without Using Retrograde Cardioplegia
Authors: Heath Michele , Yalamuri Suraj , Walker Julie , Maxwell Cory , Williams Adam , McCartney Sharon , Daneshmand Mani
Published: July 2023

The presence of cold agglutinins (CA) during cardiac surgery with cardiopulmonary bypass usually creates the need for an altered surgical plan. In this case, the CA were discovered after the initiation of bypass, limiting the time, and cardioplegia solutions that could be used in the new approach. The inability to cannulate the coronary sinus with a retrograde cardioplegia catheter excluded the standard approach to myocardial preservation with CA of using continuous warm blood. For this case, we used intermittent cold crystalloid delivered via the antegrade needle for the first half of the procedure and through the saphenous vein graft anastomosis during the aortic valve portion of the cross-clamp period.
Blood and Blood Product Conservation: Results of Strategies to Improve Clinical Outcomes in Open Heart Surgery Patients at a Tertiary Hospital
Authors: Khan Junaid H. , Green Emily A. , Chang Jimmin , Ayala Alexandria M. , Barkin Marilyn S. , Reinys Emily E. , Stanton Jeffrey , Stanten Russell D.
Published: July 2023

Blood product usage is a quality outcome for patients undergoing cardiac surgery. To address an increase in blood product usage since the discontinuation of aprotinin, blood conservation strategies were initiated at a tertiary hospital in Oakland, CA. Improving transfusion rates for open heart surgery patients requiring Cardiopulmonary bypass (CPB) involved multiple departments in coordination. Specific changes to conserve blood product usage included advanced CPB technology upgrades, and precise individualized heparin dose response titration assay for heparin and protamine management. Retrospective analysis of blood product usage pre-implementation, post-CPB changes and post-Hemostasis Management System (HMS) implementation was done to determine the effectiveness of the blood conservation strategies. Statistically significant decrease in packed red blood cells, fresh frozen plasma, cryoprecipitate, and platelet usage over the stepped implementation of both technologies was observed. New oxygenator and centrifugal pump technologies reduced active circuitry volume and caused less damage to blood cells. Individualizing heparin and protamine dosing to a patient using the HMS led to transfusion reductions as well. Overall trends toward reductions in hospital length of stay and intensive care unit stay, and as a result, blood product cost and total hospitalization cost are positive over the period of implementation of both CPB circuit changes and HMS implementation. Although they are multifactorial in nature, these trends provide positive enforcement to the changes implemented.
Extracorporeal Life Support as a Rescue Measure for Managing Life-Threatening Arrythmia and Brugada Syndrome
Authors: Beshish Asaad G. , Weinberg Allison , Ostwani Waseem , Owens Gabe E.
Published: July 2023

We describe the use of extracorporeal cardiopulmonary resuscitation (E-CPR) to transiently stabilize a 3-month-old patient who presented with ventricular tachyarrhythmias leading to spontaneous cardiac arrest. The patient required 4 days of extracorporeal life support (ECLS) where he was diagnosed with probable Brugada syndrome (BS). The patient was discharged home in stable condition after implantable cardioverter defibrillator placement. This case highlights the importance of early transfer to extracorporeal membrane oxygenation (ECMO) center in the setting of unexplained cardiac arrhythmia in a pediatric patient. BS is an autosomal dominant genetic disorder with variable expression characterized by abnormal findings on electrocardiogram (ECG) in conjunction with an increased risk of ventricular tachyarrhythmias and sudden cardiac arrest (SCA). Early management is critical and early consideration to transfer to an institution where extracorporeal life support (ECLS/ECMO) is present to support the patient while further diagnostic work up is in progress is lifesaving.
Metastasiertes Uvealmelanom
Authors: Bubenzer Rainer H.
Published: July 2023

Eine wirksame Therapie mit einem Überlebensvorteil für Patienten mit metastasiertem Uvealmelanom gab es bislang nicht. Mit Einführung von Tebentafusp kann sich nun das mediane Überleben bei metastasiertem Aderhautmelanom, entsprechend der Zulassungsstudie, auf 21,7 Monate verlängern, so Prof. Bastian Schilling, Würzburg, auf einem dermato-onkologischen Fachseminar in Regensburg, sofern der Genotyp HLA-A*02:01 nachgewiesen ist.
A large, newly discovered ghost bat colony in Queensland
Authors: Augusteyn John , Goetze Karl , Coles Roger
Published: July 2023

Obtaining accurate counts that do not cause harm to the animals being studied are important for assessing a species’ conservation status. A single evening exodus of ghost bats (Macroderma gigas) was recorded using a thermal imaging camera placed outside the entrance to a cave on Alwal National Park (CYPAL) in September 2022. At least 463 bats were counted, making it the largest known ghost bat colony in Queensland. Further work is required to determine the extent to which this colony is related to other nearby colonies in Cape York Peninsula. Work is also required to identify and reduce threats to this population and ensure its conservation.
Concordancing for CADS
Authors: Gillings Mathew , Mautner Gerlinde
Published: July 2023

Concordance analysis is widely recognised as one of the main techniques in a corpus linguist’s toolkit. However,
despite a growing body of work critically exploring previously unquestioned mainstays of corpus methods (Mautner, 2015; Taylor & Marchi, 2018), this has not
focused on concordance analysis specifically. In this paper, we aim to discuss issues that researchers may encounter when
interpreting concordances. We begin in Step One with a cursory examination of 800 concordance lines in order to identify potential
issues. In Step Two, we assess the distribution of those issues in a reduced sample of 200. As a result, we identify eight
interpretability issues: noise in the corpus, non-standard syntax, unclear referring expressions, unclear quotation source
attribution, technical terms/jargon, acronyms/initialisms, unspecific co-text, and lines unrelated to the research question. After
reflecting on practical challenges, we discuss the epistemological implications of removing concordance lines uncritically and
suggest ten recommendations for future work.
Perspectivized estar-sentences with aesthetic adjectives across American Spanish
varieties
Authors: Gumiel-Molina Silvia , Moreno-Quibén Norberto , Pérez-Jiménez Isabel
Published: July 2023

The article describes the behavior of aesthetic adjectives (bonito ‘beautiful’) in the so-called
innovative constructions with estar ‘be
estar
’, documented in some American varieties of
Spanish. These innovative structures (El poema está bonito ‘The poem is beautiful’) do not compare stages of the
subject with respect to an aesthetic property (as would be their meaning in general Spanish), but rather express a perspectivized
assertion, linked to the subjective judgment of the speaker about a particular quality. The article explains this pattern of
variation on the basis of the work by Gumiel-Molina, Moreno-Quibén and Pérez-Jiménez
(2020) and Moreno-Quibén (2022), according to which the classes of
adjectives that appear in perspectivized estar-sentences have undergone a process of argument augmentation.
Aesthetic adjectives in innovative estar-construction have an experiencer in their argument structure in the
varieties of Spanish where this construction is possible. This experiencer serves as the basis for establishing the comparison
required by estar and ultimately gives rise to the subjective/perspectivized meaning of the copular
structure.
Fan indirect subtitling of Cdramas by women in Latin America and the Caribbean
Authors: Moreno García Luis Damián
Published: July 2023

Despite its controversial status, indirect translation remains one of the most prevalent translation methods and efforts have been made to explore the positive effects of this practice. The present article aims to contribute to such endeavours by researching the potential of indirect fansubbing for the promotion of several key areas of the United Nations’ Fourth Sustainable Development Goal (SDG). The article reports on a fansubbing community consisting of Chinese to Spanish amateur subtitlers who have mobilised indirect translation to attain linguistic proficiency, translational skills and cultural literacy. Results from fieldwork and qualitative data show that indirect subtitles might enhance Spanish-speaking communities’ appreciation of foreign languages and cultures by providing access to otherwise inaccessible audiovisual products. The present research finds potential for indirect fansubbing as an autodidactic method capable of promoting a culture of lifelong learning, global citizenship, and the appreciation of cultural diversity, factors conducive to the fourth SDG.
Corrigendum: On overtravel and skate in cantilever-based probes for on-wafer measurements (2022 J. Micromech. Microeng.
32 057001)
Authors: Arscott Steve
Published: July 2023

This corrigendum reformulates the equations for the normal contact force of the probe and the condition for tip skate in the presence of friction. This enables a formulation of the effective spring constant of a tilted probe to be written down. This model is compared to that of others.
A simple way to predict the flip–chip gap
Authors: Huang Yue , Gan Zhi-Kai , Lin Chun
Published: July 2023

Using laser scanning confocal microscopy measurement, a concise method for extracting the indium bump shape in microelectronics was first established. The extracted bump shape was then used as the input for finite element analysis. The modeled one-bump deformation was used to predict the final flip–chip gap after bonding. Dovetailed with the results of cross-sectional scanning electron microscopy, this simple and non-destructive method for predicting a flip–chip gap of the order of 10 microns or less was eventually validated.
Investigations on sample entropy and fuzzy entropy for machine condition monitoring: revisited
Authors: Wang Yuting , Wang Dong
Published: July 2023

Complexity measures typically represented by entropy are capable of detecting and characterizing underlying dynamic changes in a system, and they have been considerably studied for machine condition monitoring and fault diagnosis. Various entropies have been developed based on Shannon entropy to meet actual demands. Nevertheless, currently existing research works about complexity measures mainly focus on experimental studies, and their theoretical studies are still ongoing and not fully explored. In previous studies, it was theoretically and experimentally proved that two complexity measures including correlation dimension and approximate entropy have a ‘bilateral reduction’ effect. Since sample entropy and fuzzy entropy are two more advanced complexity measures that were developed based on the concept of correlation dimension and approximate entropy, this paper continues conducting theoretical and experimental investigations on sample entropy and fuzzy entropy and exploring their theoretical properties to enrich the domain of complexity measure analysis and its applications to machine condition monitoring. Specifically, this paper theoretically proves and verifies that sample entropy and fuzzy entropy still have a similar ‘bilateral reduction’ effect with correlation dimension and approximate entropy, and they are indeed complexity measures. The relationships between sample entropy, fuzzy entropy, and their key parameters during their calculation are numerically and experimentally studied. Bearing and gear run-to-failure datasets are used to investigate the effectiveness of sample entropy and fuzzy entropy for bearing and gear condition monitoring, and experimental results of sample entropy and fuzzy entropy are well-matched with the theoretical ‘bilateral reduction’ effect of sample entropy and fuzzy entropy. Overall, this paper will provide a guideline for correct uses of sample entropy and fuzzy entropy for engineering applications, especially for machine condition monitoring.
A novel multi-featured decision system for multi-classification tasks
Authors: Xu Tong
Published: July 2023

Feature engineering is a difficult task, and for real signal data, it is difficult to find a certain feature that can easily distinguish all classes. Multiple features can provide more information, which means the fusion of multi-feature learning strategies has potential significant advantages. Based on this premise, this paper proposes a multi-class framework based on the multi-featured decision to distinguish all the different classes, and takes automatic dependent surveillance-broadcast (ADS-B) signal data as an example, first extracts the phase features and wavelet decomposition features of the signal data, then selects the features with high discrimination between classes, then proposes a one-dimensional residual neural network based on 16 convolutional layers to learn the unique features of different features and classes separately, and finally proposes a novel multi-featured decision method based on voting method and a priori probability. Results show that the proposed one-dimensional residual neural network has better performance metrics on the test set compared to some machine learning-based and neural network-based algorithms, with classification accuracies of 86.1%, 84.6% and 83.6% on wavelet decomposition features, raw features and phase features, respectively, on ADS-B preamble signals. The proposed feature decision framework based on the voting method and a priori probability has a recall, precision and F1 value of 80.24%, 89.89% and 84.79% on ADS-B preamble signals, respectively.
Impact of Reynolds number in modulating wall stresses in radial stagnation-point flow
Authors: Sarfraz M , Khan M
Published: July 2023

Wall stresses play a critical role in fluid dynamics and understanding their impact can lead to significant improvements in system performance and efficiency. This article presents a study on the impact of the Reynolds number and magnetic number on wall stresses, energy transport, and thermodynamic irreversibility analysis in axisymmetric flow near the stagnation region. We consider a hybrid nanofluid flow containing titania and silica nanoparticles, using Yamada-Ota and Xue thermal conductivity models. The flow is driven by a cylinder rotating along the z-direction with solar radiation and a magnetic field. To formulate the problem, we use similarity transformation to obtain dimensionless ordinary differential equations and obtain numerical solutions with graphical illustrations by bvp5c in Matlab. The comparison between hybrid nanofluid models indicates a higher rate of heat transformation, with the Yamada-Ota hybrid nanofluid model demonstrating better and faster heat transport properties than the Xue model. This study underlines the importance of understanding the impact of controlled parameters on wall stresses to optimize fluid dynamics system performance and efficiency. Moreover, it highlights the potential of entropy generation analysis to identify changes in thermal processes and reduce the loss of available mechanical power in thermo-fluid systems and provides a foundation for exploring and developing advanced technologies and systems with improved heat transfer performance and energy efficiency.
New analytical solutions and integrability for the (2 + 1)-dimensional variable coefficients generalized Nizhnik-Novikov-Veselov system arising in the study of fluid dynamics via auto-Backlund transformation approach
Authors: Singh Shailendra , Saha Ray S
Published: July 2023

Recognising the non-uniformity of boundaries and the inhomogeneities of media, nonlinear evolution equations with variable coefficients may display more realistic scenarios dealing with time-varying environments and inhomogeneous media. In this work, the (2 + 1)-dimensional variable coefficients generalized Nizhnik-Novikov-Veselov system that occurs in the domain of fluid dynamics is investigated. Painlevé analysis technique is used to demonstrate the integrability of the above mentioned system. The governing equations are revealed to be integrable in the Painlevé sense under no specific criterion on the variable-coefficients. To derive numerous analytical solutions, the auto-Bäcklund transformation (ABT) method is taken into account. Consequently, three different analytical solutions are found using the ABT technique, which include linear, exponential, rational, and complex solutions. All the solutions are displayed as 3D plots in which variable coefficients and parameters are varied to produce the desired results. These graphs depict the many aspects of the proposed coupled system in the various forms of periodic waves and complex periodic wave surfaces.
Optically controlled n −Si/p −SeO2/p −SiO2 microwave resonators designed for 5G/6G communication technology
Authors: Qasrawi A F
Published: July 2023

Herein n−Si/p−SiO2 interfaces comprising layers of p-SeO2 are employed as an optically controllable microwave resonators. The stacked layers of SeO2 (500 nm) and SiO2 (50 nm) were deposited onto

n
−

type Si thin crystals by the thermal evaporation technique under a vacuum pressure of 10−5 mbar. Ytterbium and Au metals were coated onto SiO2 and Si layers, respectively, to form Schottky arms. Energy band diagram analyses were performed to confirm the formation of doubled conduction and valence band offsets. These offsets create energy barriers and potential wells that contribute to the bistable behavior. Photo-impedance spectroscopic measurements were conducted on the device under blue light, demonstrating its ability to function as a light-power tunable microwave resonator and MOS capacitor. In the absence of light, negative capacitance (NC) effects were observed above a driving frequency of 1.07 GHz. As the device was exposed to light and the light power increased, the frequency range of NC effects shifted to higher driving frequencies. Furthermore, the range of NC effects became narrower with increasing light power, indicating a more limited frequency range for the manifestation of negative capacitance. In addition,

n
−

Si/

p
−

SeO2/

p
−

SiO2 microwaves resonators displayed high cutoff frequency exceeding 0.10 THz at driving frequency of 1.07 GHz in the dark. The driving frequency also shifted toward larger values as light power is increased indicating the ability to optically control the cutoff frequency range and value. The high response of the capacitance, conductance, cutoff frequency spectra and the dependence of capacitance–voltage characteristics on incident light power nominate the device as microwave resonators and MOS electro-optic devices suitable for 5G/6G communication technology.
Investigation of Cr3+ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications
Authors: Valente-Rodrigues C L , Caraballo-Vivas Richard J , Santos Evelyn C S , Sharma Surender K , Garcia Flávio
Published: July 2023

Controlling the Curie temperature (TC) in the range from 42 °C–46 °C in magnetic hyperthermia (MH) therapy is an essential research topic because overheating can cause irreversible damage to healthy tissue. When TC is in the above temperature range, the magnetic nanoparticles reach a paramagnetic state, effectively turning off the MH treatment. In this work, we synthesized Zn-Co nanoparticles of representative composition Zn0.54Co0.46CrxFe2-xO4, where the Fe3+ cations are carefully replaced by Cr3+ ions, which allow a precise tuning of TC and hence the self-regulation of MH. The x-ray diffraction analysis of the prepared nanoparticles confirms the formation of a single-phase cubic spinel structure. The average crystallite of the nanoparticles increases with Cr3+ doping, while the Tc and saturation magnetization decrease considerably from 78 °C (x = 0.1) to 27 °C (x = 0.6) and 46.6 emu g−1 (x = 0.1) to 15.3 emu g−1 (x = 0.6), respectively. Besides MH potential of the investigated samples as revealed from specific absorption rate (SAR) assays and the maximum temperature reach (Tmax), vary from 7 W g−1 and 37.3 °C, for x = 0.6, to 38 W g−1 and 62.9 °C, for x = 0.1, we found that the composition Zn0.54Co0.46Cr0.4Fe1.6O4 is more promising with SAR of 22 W g−1 and Tmax = 42.3 °C, which is precisely lies in the safe temperature range to automatically activate the self-regulation during the magnetic hyperthermia treatment. The results reveal an excellent combination between size distribution and Cr3+ content in Zn-Co-based ferrite, which has a great potential for self-regulated magnetic hyperthermia applications.
Generalized quantum geometric tensor for excited states using the path integral approach
Authors: Juárez Sergio B , Gonzalez Diego , Gutiérrez-Ruiz Daniel , Vergara J David
Published: July 2023

The quantum geometric tensor, composed of the quantum metric tensor and Berry curvature, fully encodes the parameter space geometry of a physical system. We first provide a formulation of the quantum geometrical tensor in the path integral formalism that can handle both the ground and excited states, making it useful to characterize excited state quantum phase transitions (ESQPT). In this setting, we also generalize the quantum geometric tensor to incorporate variations of the system parameters and the phase-space coordinates. This gives rise to an alternative approach to the quantum covariance matrix, from which we can get information about the quantum entanglement of Gaussian states through tools such as purity and von Neumann entropy. Second, we demonstrate the equivalence between the formulation of the quantum geometric tensor in the path integral formalism and other existing methods. Furthermore, we explore the geometric properties of the generalized quantum metric tensor in depth by calculating the Ricci tensor and scalar curvature for several quantum systems, providing insight into this geometric information.
Effect of biharmonic excitation on complex dynamics of a two-degree-of-freedom heavy symmetric gyroscope
Authors: Aguessivognon J M , Miwadinou C H , Monwanou A V
Published: July 2023

This work analyzes the chaotic dynamics and the coexistence of attractors and their control in the complex dynamics of a rotating gyroscope modeled following Euler angles using the Lagrange approach. The fixed points of the system is checked and their stability analyzed. The complete dynamics of the gyroscope is studied and the coexistence of attractors analyzed using Runge-Kutta algorithm of order 4. It is obtained for appropriate conditions the coexistence of chaotic and/or regular attractors. The study also pointed out that the dissipation and the first integrals of the moments of inertia of the gyroscope influence the chaotic dynamics as well as the coexistence of the attractors. Finally, the control of the coexistence of attractocs obtained is done using a biharmonic excitation. The analysis of the effects of the amplitudes and frequencies of this excitation makes it possible to find the best areas where the control is effective.
Fermi level depinning via insertion of a graphene buffer layer at the gold–2D tin monoxide contact
Authors: Tian Yujia , Kripalani Devesh R , Xue Ming , Zhou Kun
Published: July 2023

Two-dimensional (2D) tin monoxide (SnO) has attracted much attention owing to its distinctive electronic and optical properties, which render itself suitable as a channel material in field effect transistors (FETs). However, upon contact with metals for such applications, the Fermi level pinning effect may occur, where states are induced in its band gap by the metal, hindering its intrinsic semiconducting properties. We propose the insertion of graphene at the contact interface to alleviate the metal-induced gap states. By using gold (Au) as the electrode material and monolayer SnO (mSnO) as the channel material, the geometry, bonding strength, charge transfer and tunnel barriers of charges, and electronic properties including the work function, band structure, density of states, and Schottky barriers are thoroughly investigated using first-principles calculations for the structures with and without graphene to reveal the contact behaviours and Fermi level depinning mechanism. It has been demonstrated that strong covalent bonding is formed between gold and mSnO, while the graphene interlayer forms weak van der Waals interaction with both materials, which minimises the perturbance to the band structure of mSnO. The effects of out-of-plane compression are also analysed to assess the performance of the contact under mechanical deformation, and a feasible fabrication route for the heterostructure with graphene is proposed. This work systematically explores the properties of the Au–mSnO contact for applications in FETs and provides thorough guidance for future exploitation of 2D materials in various electronic applications and for selection of buffer layers to improve metal–semiconductor contact.
CL-shellable posets with no EL-shellings
Authors: Li Tiansi
Published: July 2023

We construct an ungraded CL-shellable poset and a graded CL-shellable poset and show that neither is EL-shellable.
Universality of the cokernels of random 𝑝-adic Hermitian matrices
Authors: Lee Jungin
Published: July 2023

In this paper, we study the distribution of the cokernel of a general random Hermitian matrix over the ring of integers

O

\mathcal {O}

of a quadratic extension

K
K

of

Q

p

\mathbb {Q}_p

. For each positive integer

n
n

, let

X
n

X_n

be a random

n
×
n

n \times n

Hermitian matrix over

O

\mathcal {O}

whose upper triangular entries are independent and their reductions are not too concentrated on certain values. We show that the distribution of the cokernel of

X
n

X_n

always converges to the same distribution which does not depend on the choices of

X
n

X_n

as

n
→
∞

n \rightarrow \infty

and provide an explicit formula for the limiting distribution. This answers Open Problem 3.16 from the ICM 2022 lecture note of Wood [Probability theory for random groups arising in number theory, 2022] in the case of the ring of integers of a quadratic extension of

Q

p

\mathbb {Q}_p

.
AtacAnnoR: a reference-based annotation tool for single cell ATAC-seq data
Authors: Tian Lejin , Xie Yunxiao , Xie Zhaobin , Tian Jasmine , Tian Weidong
Published: July 2023

Here, we present AtacAnnoR, a two-round annotation method for scATAC-seq data using well-annotated scRNA-seq data as reference. We evaluate AtacAnnoR’s performance against six competing methods on 11 benchmark datasets. Our results show that AtacAnnoR achieves the highest mean accuracy and the highest mean balanced accuracy and performs particularly well when unpaired scRNA-seq data are used as the reference. Furthermore, AtacAnnoR implements a ‘Combine and Discard’ strategy to further improve annotation accuracy when annotations of multiple references are available. AtacAnnoR has been implemented in an R package and can be directly integrated into currently popular scATAC-seq analysis pipelines.
Instrumental variable quantile regression under random right censoring
Authors: Beyhum Jad , Tedesco Lorenzo , Van Keilegom Ingrid
Published: July 2023

This paper studies a semiparametric quantile regression model with endogenous variables and random right censoring. The endogeneity issue is solved using instrumental variables. It is assumed that the structural quantile of the logarithm of the outcome variable is linear in the covariates and censoring is independent. The regressors and instruments can be either continuous or discrete. The specification generates a continuum of equations of which the quantile regression coefficients are a solution. Identification is obtained when this system of equations has a unique solution. Our estimation procedure solves an empirical analogue of the system of equations. We derive conditions under which the estimator is asymptotically normal and prove the validity of a bootstrap procedure for inference. The finite sample performance of the approach is evaluated through numerical simulations. An application to the national Job Training Partnership Act study illustrates the method.
Associations between the neighbourhood food environment and cardiovascular disease: a systematic review
Authors: Meijer Paul , Numans Hidser , Lakerveld Jeroen
Published: July 2023

Aims

To systematically review the current evidence on the association between the neighbourhood food environment and cardiovascular disease (CVD) in adults.

Methods and results

We searched the literature databases CINAHL, MEDLINE, and EMBASE for studies published between 1 January 2000 and 1 May 2022. Studies focusing on the indoor home, workplace, or school food environment were excluded. Two independent reviewers screened all records. Included studies were assessed for risk of bias using the shortened QUIPS tool, and relevant data were extracted. We summarized the findings using a narrative synthesis approach. We included 15 studies after screening 5915 original records. Most studies were published in the last 4 years and were predominantly conducted in North American or European countries. These studies focused on fast-food restaurant density in the residential neighbourhood. A higher fast-food restaurant density was most consistently associated with a higher prevalence and incidence of CVD and CVD mortality, but effect sizes were small. Evidence of an association between fast-food restaurant density and myocardial infarction, or stroke was inconsistent. The other aspects of the food environment were density of food service restaurants, unhealthy food outlets, and food access score. However, there was scant evidence for these aspects.

Conclusion

We found evidence for associations between the neighbourhood food environment and CVD, suggesting that a higher fast-food restaurant density is associated with CVD and CVD mortality. Effect sizes were small but important, given the fact that a large population is exposed. Research is needed to assess the effects of other aspects of the food environment.

Systematic review registration

PROSPERO CRD42022317407.