bluuebunny/crossref_metadata_2025_split huggingface dataset:
Electronic and optical properties of chemically modified 2D GaAs nanoribbons
Authors: Sakr Mahmoud A. S. , Saad Mohamed A. , Abdelsalam Hazem , Teleb Nahed H. , Zhang Qinfang 
Published: September 2023

AbstractWe employed density functional theory calculations to investigate the electronic and optical characteristics of finite GaAs nanoribbons (NRs). Our study encompasses chemical alterations including doping, functionalization, and complete passivation, aimed at tailoring NR properties. The structural stability of these NRs was affirmed by detecting real vibrational frequencies in infrared spectra, indicating dynamical stability. Positive binding energies further corroborated the robust formation of NRs. Analysis of doped GaAs nanoribbons revealed a diverse range of energy gaps (approximately 2.672 to 5.132 eV). The introduction of F atoms through passivation extended the gap to 5.132 eV, while Cu atoms introduced via edge doping reduced it to 2.672 eV. A density of states analysis indicated that As atom orbitals primarily contributed to occupied molecular orbitals, while Ga atom orbitals significantly influenced unoccupied states. This suggested As atoms as electron donors and Ga atoms as electron acceptors in potential interactions. We investigated excited-state electron–hole interactions through various indices, including electron–hole overlap and charge-transfer length. These insights enriched our understanding of these interactions. Notably, UV–Vis absorption spectra exhibited intriguing phenomena. Doping with Te, Cu, W, and Mo induced redshifts, while functionalization induced red/blue shifts in GaAs-34NR spectra. Passivation, functionalization, and doping collectively enhanced electrical conductivity, highlighting the potential for improving material properties. Among the compounds studied, GaAs-34NR-edg-Cu demonstrated the highest electrical conductivity, while GaAs-34NR displayed the lowest. In summary, our comprehensive investigation offers valuable insights into customizing GaAs nanoribbon characteristics, with promising implications for nanoelectronics and optoelectronics applications.
Automatic identification of posteroanterior cephalometric landmarks using a novel deep learning algorithm: a comparative study with human experts
Authors: Lee Hwangyu , Cho Jung Min , Ryu Susie , Ryu Seungmin , Chang Euijune , Jung Young-Soo , Kim Jun-Young 
Published: September 2023

AbstractThis study aimed to propose a fully automatic posteroanterior (PA) cephalometric landmark identification model using deep learning algorithms and compare its accuracy and reliability with those of expert human examiners. In total, 1032 PA cephalometric images were used for model training and validation. Two human expert examiners independently and manually identified 19 landmarks on 82 test set images. Similarly, the constructed artificial intelligence (AI) algorithm automatically identified the landmarks on the images. The mean radial error (MRE) and successful detection rate (SDR) were calculated to evaluate the performance of the model. The performance of the model was comparable with that of the examiners. The MRE of the model was 1.87 ± 1.53 mm, and the SDR was 34.7%, 67.5%, and 91.5% within error ranges of < 1.0, < 2.0, and < 4.0 mm, respectively. The sphenoid points and mastoid processes had the lowest MRE and highest SDR in auto-identification; the condyle points had the highest MRE and lowest SDR. Comparable with human examiners, the fully automatic PA cephalometric landmark identification model showed promising accuracy and reliability and can help clinicians perform cephalometric analysis more efficiently while saving time and effort. Future advancements in AI could further improve the model accuracy and efficiency.
SARS-CoV-2 antibodies recognize 23 distinct epitopic sites on the receptor binding domain
Authors: Jiang Jiansheng , Boughter Christopher T. , Ahmad Javeed , Natarajan Kannan , Boyd Lisa F. , Meier-Schellersheim Martin , Margulies David H. 
Published: September 2023

AbstractThe COVID-19 pandemic and SARS-CoV-2 variants have dramatically illustrated the need for a better understanding of antigen (epitope)-antibody (paratope) interactions. To gain insight into the immunogenic characteristics of epitopic sites (ES), we systematically investigated the structures of 340 Abs and 83 nanobodies (Nbs) complexed with the Receptor Binding Domain (RBD) of the SARS-CoV-2 spike protein. We identified 23 distinct ES on the RBD surface and determined the frequencies of amino acid usage in the corresponding CDR paratopes. We describe a clustering method for analysis of ES similarities that reveals binding motifs of the paratopes and that provides insights for vaccine design and therapies for SARS-CoV-2, as well as a broader understanding of the structural basis of Ab-protein antigen (Ag) interactions.
Taphonomy of non-biomineralized trilobite tissues preserved as calcite casts from the Ordovician Walcott-Rust Quarry, USA
Authors: Losso Sarah R. , Thines Jennifer E. , Ortega-Hernández Javier 
Published: September 2023

AbstractTrilobites with appendages from the Rust Formation of New York State were discovered in the 1870s and represent one of the earliest known cases of exceptional preservation of non-biomineralized tissues. The Rust Formation trilobites feature three-dimensionally preserved walking legs and delicate respiratory lamellae, but the mechanism behind their fossilization remains unknown. Here we show that after burial, carcass decay produced framboidal pyrite, while fibrous calcite precipitated on the visceral side of the body, followed by the widespread formation of sparry calcite crystal replicating non-biomineralized morphological features. Trilobites and co-occurring calcite veins show no chemical or petrographic differences, rejecting the hypothesis that exceptional preservation was caused by a local microenvironment within enrolled trilobites. These results suggest that fine-grained sediment provided support for the appendages and facilitated their fossilization through calcite replacement. Our findings carry broader implications for understanding the exceptional three-dimensional preservation of animal Paleozoic body fossils through calcite casts.
gm/Id$g_m/I_d$ Analysis of vertical nanowire III–V TFETs
Authors: Rangasamy Gautham , Zhu Zhongyunshen , Fhager Lars Ohlsson , Wernersson Lars‐Erik 
Published: September 2023

AbstractExperimental data on analog performance of gate‐all‐around III‐V vertical Tunnel Field‐Effect Transistors (TFETs) and circuits are presented. The individual device shows a minimal subthreshold swing of 44 mV/dec and transconductance efficiency of 50 V−1 for current range of 9 nA/μm to 100 nA/μm and at a drain voltage of 100 mV. This TFET demonstrates translinearity between transconductance and drain current for over a decade of current, paving way for low power current‐mode analog IC design. To explore this design principle, a current conveyor circuit is implemented, which exhibits large‐signal voltage gain of 0.89 mV/mV, current gain of 1nA/nA and an operating frequency of 320 kHz. Furthermore, at higher drain bias of 500 mV, the device shows maximum transconductance of 72 μS/μm and maximum drain current of 26 μA/μm. The device, thereby, can be operated as a current mode device at lower bias voltage and as voltage mode device at higher bias voltage.
Direct and continuous dosing of propofol can saturate Ex vivo ECMO circuit to improve propofol recovery
Authors: Khurana Nitish , Sünner Till , Hubbard Oliver , Imburgia Carina E. , Yellepeddi Venkata , Ghandehari Hamidreza , Watt Kevin M. 
Published: September 2023

Background: Extracorporeal membrane oxygenation (ECMO) is a cardiopulmonary bypass device that provides life-saving complete respiratory and cardiac support in patients with cardiorespiratory failure. The majority of drugs prescribed to patients on ECMO lack a dosing strategy optimized for ECMO patients. Several studies demonstrated that dosing is different in this population because the ECMO circuit components can adsorb drugs and affect drug exposure substantially. Saturation of ECMO circuit components by drug disposition has been posited but has not been proven. In this study, we have attempted to determine if propofol adsorption is saturable in ex vivo ECMO circuits. Methods: We injected ex vivo ECMO circuits with propofol, a drug that is highly adsorbed to the ECMO circuit components. Propofol was injected as a bolus dose (50 μg/mL) and a continuous infusion dose (6 mg/h) to investigate the saturation of the ECMO circuit. Results: After the bolus dose, only 27% of propofol was recovered after 30 minutes which is as expected. However, >80% propofol was recovered after the infusion dose which persisted even when the infusion dose was discontinued. Conclusion: Our results suggest that if ECMO circuits are dosed directly with propofol, drug adsorption can be eliminated as a cause for altered drug exposure.
Field of Research: Artificial Lung/ECMO
Painful Hallux Sesamoid: A Pictorial Review
Authors: Shah Ankur , Patel Drushi 
Published: September 2023

AbstractSesamoids are small bony structures that are either partially or completely embedded in a tendon. Sesamoid bones are found at multiple places in body but most common sites are in foot, with the most consistent location being the metatarsophalangeal joint of great toe. Various pathologies affecting the sesamoid bones of hallux can be a cause of long-standing forefoot pain and discomfort. Imaging helps in diagnosis of these conditions at an early stage. Imaging also helps in differentiating these pathologies from normal variants like bipartite sesamoid bone.
Renal Transplant Complications—A Pictorial Review
Authors: Christopher Navya , Periaswamy Gopinath , Arunachalam Venkatesh Kasi , Poyyamoli Santhosh , Mehta Pankaj , Cherian Mathew 
Published: September 2023

AbstractRenal transplantation is the most effective treatment for end-stage renal disease, with advanced immunosuppressive therapy and better surgical techniques resulting in better survival of the graft. Despite the advances, complications do occur in the postoperative period and timely diagnosis of the complications is vital for prompt management and salvage of the transplant. This pictorial essay aims to classify the complications of renal transplantation, describe the various imaging modalities used to detect complications, and provide a brief overview of the role of interventional radiology in their management. The complications can be broadly divided into perinephric fluid collections, vascular, collecting system, and parenchymal complications. Imaging including ultrasonography, computed tomography, magnetic resonance imaging, and newer methods like elastography, magnetic resonance imaging arterial spin labeling, diffusion-weighted imaging, diffusion kurtosis imaging, blood oxygenation-level dependent, and magnetic resonance elastography can be used in the diagnosis of these complications. Interventional radiology has advanced a lot in managing them; hence, interventional techniques can be the first choice of treatment in institutions where robust interventional radiology setup is available.
A Rare Occurrence of Demyelinating Lesions of Bilateral Trigeminal Nerves: An Atypical Presentation of Pediatric Multiple Sclerosis
Authors: Manfrini Elia , Falcioni Ludovica , Cavassa Vanna , Cocco Eleonora , Sotgiu Stefano , Saba Luca 
Published: September 2023

AbstractPontine trigeminal root entry zone is a typical, although uncommon, location for multiple sclerosis (MS) lesions to occur. Here, we present a 17-year-old girl with nausea, vomiting, and vertigo. Neurological examination was consistent with central nystagmus, positive Romberg's test, and left-sided hyperreflexia. Baseline magnetic resonance imaging fulfilled McDonald 2017 criteria for MS and showed T2-hyperintense and T1-hypointense bilateral demyelinating lesions at the intramedullary portion of the trigeminal root of the fifth nerve, with no contrast enhancement or restricted diffusion. Bilateral intrapontine trigeminal involvement is a rare finding in MS, as well as the combined central and peripheral demyelination. Furthermore, very limited information and cases have been described in pediatric patients.
Effect of Target-Driven Sedation Protocol to Ventilator Liberation in Pediatric Intensive Care Unit: Pre- and Postimplementation Single-Center Study
Authors: Alfraij Abdulla , Abdelmoniem Ahmed , Surour Mohammad , Basuni Mohamed , Elseadawy Mohamed 
Published: September 2023

AbstractOversedation of mechanically ventilated children is common in many pediatric intensive care units (PICUs). This practice is driven by the challenges of dealing with children of different ages as they have different behavioral, mental, and emotional statuses. We aimed to evaluate the effect of implementing a target-driven sedation protocol in the PICU on ventilator-free days (VFDs), PICU stays, and hospitalization. A 2-year retrospective cohort study was performed in our PICU between October 1, 2018, and October 1, 2020. All intubated children up to 12 years of age were included. Descriptive analyses and a pre- and postintervention comparison of VFDs and length of stay were used to assess the protocol's effectiveness. A total of 134 patients were studied. There was a significant increase in VFDs in cases with respiratory illness requiring mechanical ventilation after implementing this protocol (19.9 vs. 22.3, respectively, with a p-value of 0.031). Also, there was a trend of reduction in the length of PICU stay (median of 9 vs. 8 days, p = 0.816), post-PICU length of stay (median of 4 vs. 3 days, p = 0.055), and hospitalization duration (median of 16 vs. 13 days, p = 0.062) though not statistically significant. Implementing a target-driven sedation protocol in the PICU significantly affects VFDs in mechanically ventilated respiratory cases. Though inconclusive in our study, implementing such a protocol will influence patients' care and reduce unnecessary sedation uses that will reduce sedation hazards.
Will falling domestic labor compensation share really be improved when global trade slowdown?
Authors: Wang Lei , Ramsey Thomas Stephen 
Published: September 2023

AbstractThe participation of Global Value Chains (GVCs) in the world’s major economies has changed from rising to falling since 2010. Based on GVCs income, SDA method and multiple panel regression, this paper explores the cross-cycle effect, mechanism and persistence paths of GVCs participation on domestic labor compensation share in 51 economies from 2000 to 2018. The paper concludes that the overall effect of participating in GVCs on domestic labor compensation share is negative. However, forward participation in GVCs perform better than backward GVCs participation in stabilizing domestic labor compensation share. Capital-biased technological progress and availability of overseas labor are conditions under which the GVCs participation undermines domestic labor compensation share. This paper propose to seize the opportunity to increase the labor compensation share through measures and policies, such as promoting fair competition in domestic market, servitization of industrial structure and the establishment of relational value chains.
The influence of self-quantification on individual’s participation performance and behavioral decision-making in physical fitness activities
Authors: Zhang Yu-dong , Zhang Hui-long , Xie Jia-qin , Zhang Chu-bing 
Published: September 2023

AbstractAs individuals are involved in self-quantification, increasing fields are applying self-quantification with technical support, and a clear understanding of the influencing mechanism and effect boundary of self-quantification is indispensable. Focusing on the field of physical fitness, under different goal settings, the influencing mechanisms of self-quantification on an individual’s participation performance (outcome, experience, persistence intention) and behavioral decision-making (category selection, novelty-seeking) are analyzed and confirmed. The results show that when there is no goal, self-quantification will enhance outcome salience, thus enhancing the individual’s participation outcome and selection for highly healthy categories; self-quantification will reduce perceived enjoyment, thus damaging participation experience and novelty-seeking, but does not affect the persistence intention. When there is a goal, self-quantification will enhance perceived certainty, thus reducing the individual’s participation outcome and selection for highly healthy categories; self-quantification will enhance perceived enjoyment, thus improving the participation experience, persistence intention, and novelty-seeking. Compared to descriptive analysis of phenomena, through laboratory and field experiments, this research confirms the influencing mechanism and effect boundary of self-quantification on an individual’s activity participation performance in real situations. This provides a theoretical basis for understanding the targeted behavioral decision-making patterns of individuals in different types of self-quantification activities.
Magnetoresistance in Pd–Co/Cu/Pd–Co trilayer under hydrogen–nitrogen gas mixture
Authors: Akamaru Satoshi , Godo Naoki , Koshimoto Sakie 
Published: September 2023

The magnetoresistance of three Pd–Co(1)/Cu/Pd–Co(3) trilayers with different Pd–Co(3) thicknesses were evaluated in a H2–N2 gas mixture. The resistance of Pd–Co/Cu/Pd–Co increased with increasing hydrogen concentration in the gas phase, which is similar to the behavior observed in the Pd metal. The peak structure was shown in the magnetoresistance under a nitrogen atmosphere and was associated with magnetic scattering at the interface between the Pd–Co and Cu layers. In the H2–N2 gas mixture, the peak position and width in the resistance profiles were independent of the hydrogen concentration for all the prepared trilayers, and the peak intensity decreased with increasing hydrogen concentration for the trilayer containing a 4.2 nm thick Pd–Co(3) layer. The decrease in intensity was due to the reduction in magnetization in the Pd–Co layer after hydrogen absorption. The change in the resistance ratio by hydrogen absorption in the trilayer was larger under a high external magnetic field of 170 mT than under a low magnetic field of 10 mT. These results confirmed that the multilayered structure of the Pd–Co/Cu enhances the resistance response to hydrogen under a high magnetic field.
Estimating the contribution of community landscape construction to urban carbon neutrality: methodology and database construction
Authors: Huo Zhaoman , Liu Gengyuan , Yan Ningyu , Li Hui , Shah Aamir Mehmood , Chen Yu , Zhao Bin , Lu Zhongming , Ghisellini Patrizia 
Published: September 2023

Abstract
Green ecological communities have garnered significant interest due to their role in providing urban ecosystem services, and community greening plays a pivotal role in urban environmental enhancement. In the context of carbon neutrality-oriented goals, it is imperative to acknowledge the significance of various landscape designs in carbon sequestration within community greening initiatives. However, there is currently a lack of consideration for landscape designs that promote high carbon sequestration in community greening projects. Our research with literature research and experimental measurement data as data sources, established a database of carbon sequestration of 138 common vegetation species in Shanghai. Based on the vertical vegetation structure within landscape design, we propose seven modular planting structures that reflect the carbon sequestration potential of high-capacity plants within different community green spaces. Our findings reveal substantial variations in carbon sequestration among different tree species within arbor and shrub categories, whereas the differences in carbon sequestration among various herbaceous plants per unit area are comparatively smaller. Among the different combination patterns, the highest carbon sequestration is achieved by the vegetation configuration of the three-layer structure pattern, and the combination of arbors, shrubs and grasses can maximize the effective use of space. This study holds significant importance in optimizing the utilization of limited green spaces within communities and enhancing the carbon sequestration benefits of community landscapes. Ultimately, these efforts contribute significantly to Shanghai’s journey toward carbon neutrality.
A comparative evaluation of equivalent circuit and finite element electrical skin modelling techniques
Authors: Greig T , Yang K , Torah R 
Published: September 2023

Abstract
Mathematical models are essential to our understanding of the electrical properties of the skin. In this paper, two types of simulation model, an equivalent circuit and a finite element simulation were investigated and compared to evaluate their accuracy. Impedance spectra were measured, between 100 Hz and 50 MHz, (the limits of the available spectrum analyser) of a pair of electrodes placed on skin and these spectra used to find the parameters of a standard equivalent circuit model. The resulting indicated that the components of the equivalent circuit may represent different parts of the skin physiology that indicated by the literature. A simulation model was constructed in COMSOL, with the dimensions, permittivity and conductivity of each skin layer taken from across the published literature. This model was tested for sensitivity to the thicknesses of tissue layers as well as the shape of the boundary between layers. It was found that changing the layer thicknesses only had a significant effect for the stratum corneum and dermis, and that changing the shape of the boundary between layers created an impedance change of up to two times at certain higher frequencies (>1 kHz). While the impedance curves generated by the two models had the same overall profile, there was a difference of up to 100 times in their DC impedance values. This indicated that the broad understanding of how electrical signals of different frequencies pass through the skin is correct, but that significant insufficiencies exist in the published properties of the skin layers, particularly the stratum corneum and that finding more accurate values for these properties is necessary for the development of better models.
Predictions from a mathematical approach to model ionic signaling for rapid responses of Sertoli cells exhibit similarities to pharmacological approaches
Authors: Taques Bárbara O M , Gamba Humberto R , Menegaz Danusa , Silva Fátima R M B , Suzuki Daniela O H 
Published: September 2023

Abstract
Sertoli cells are essential for the male reproduction system as they provide morphological support and nutrients for germ cells to guarantee ongoing spermatogenesis. The aim of this work was to predict the electrical properties at the plasma membrane that trigger Sertoli cell rapid responses by involving ionic channels. The rapid responses of Sertoli cells in culture were monitored using patch clamp electrical measurement and compared to data obtained using pharmacological tools (from intact seminiferous tubules). A mathematical model was used to define the roles of potassium channels and the ATP-dependent Na+/K+ pump in these responses. Mathematical data verification was also performed to determine the resting and hormonal stimulated membrane potentials of Sertoli cells in the intact seminiferous tubules and of Sertoli cells in culture (patch clamp measurements). The prediction of these data based on mathematical modeling demonstrated, for the first time, the involvement of potassium channels and the activation of Na+/K+ pump in the hyperpolarization of Sertoli cells and their consequent rapid responses. Moreover, the mathematical analysis showing the involvement of ionic balance in the rapid responses of these cells to hormones, such as follicle-stimulating hormone, is consistent with previous reports obtained using pharmacological techniques in Sertoli cells. Thus, the validation of such data is reliable and represents a first step in the proposition for a mathematical model to predict rapid responses of Sertoli cells to hormonal stimuli.