bluuebunny/crossref_metadata_2025_split huggingface dataset:
Safety and Efficacy of the Hilzo Esophageal Stent for the Management of Dysphagia in Malignant Esophageal Obstruction
Authors: Lagha Eamon , Mulholland Douglas , Tadros Catharine , Faris Mohamad , Sabharwal Tarun , Diamantopoulos Athanasios , Ahmed Irfan 
Published: October 2022

AbstractA multi-institutional retrospective review in four oncology centers was performed during a 5-year period (2015–2020) identifying all patients who underwent placement of the Hilzo esophageal stent for the management of malignant esophageal obstruction. Patient notes, imaging, and reports of each procedure were reviewed for demographics, lesion, and tumor-specific characteristics. The primary outcome was an improvement in symptoms of dysphagia using the Mellow–Pinkas dysphagia score. Secondary outcomes were periprocedural mortality, 30-day mortality, tumor overgrowth/restenosis, stent migration, stent compression/failure-to-expand, worsening dysphagia of unidentified cause, and procedure-related complications. A total of 58 patients met the inclusion criteria for this study and were analyzed. The median follow-up was 151 days (range: 6–627). The median dysphagia score improved from 3 to 1. Improvement was noted on 90% of the cases reporting dysphagia data. The 30-day mortality rate was 16%. No major complications were noted related to the procedure (grade: 4–6). Minor complications (grade: 1–3) included chest pain/odynophagia/heartburn in 17 (29%) of patients which all settled with symptomatic management. Secondary outcomes were as follows: tumor overgrowth/restenosis, 13 (22%); stent migration, 9 (16%); stent compression/failure to expand, 3 (5%); and worsening dysphagia of unidentified cause, 4 (7%). The Hilzo stent performed in line with the performance of other esophageal stents on the market. Hilzo stent insertion improved dysphagia scores with no major complications reported.
Effect of COVID-19 on Orthopaedic Trauma Admissions and Operating in a London District General Hospital
Authors: Zahoor Ubaid , Malik Catherine , Raja Hassan , Ramaraju Sruthi , Sri-Ram Kesavan 
Published: October 2022

Abstract
Background The coronavirus disease 2019 (COVID-19) has presented orthopaedic departments around the world with unprecedented challenges across all aspects of health care service delivery. This study explores the effect of the COVID-19 lockdown on trauma admissions and trauma theater utilization at a London District General Hospital.
Methods Data was collected retrospectively from electronic patient records for 4 weeks from the initiation of two lockdown periods beginning March 16, 2020 and December 23, 2020. Results were compared with a comparable time period in 2019. Patient age, date of admission, time of admission, date of operation, length of stay, length of operation, type of operation, and length of anesthesia were analyzed.
Results Fewer patients were admitted during the COVID-19 period for trauma (108 in 2019 vs. 65 in March 2020 and 77 in December 2020). In addition, there was a significant shift in patient demographics, with the mean age of patients being 55.6 years in 2019 and 64.1 years in March 2020 and December 2020 (p = 0.038). The most common mechanism of injury in both years was due to falls; however, the proportion of injuries due to falls fell from 75% in 2019 to 62% March 2020, but not significant change from pre-COVID baseline in December 2020 (77% falls). The duration of anesthesia was significantly longer in March 2020 (136 minutes) compared with in 2019 (83 minutes) (p < 0.00001). There was no statistically significant difference in operation length for each operation type, but there was an overall increase in median operation length of 13.6% in March 2020 from the previous year. Finally, although overall length of stay was roughly constant, the time between admission and operation was significantly reduced in March 2020 (1.22 vs. 4.74 days, p < 0.0000001).
Conclusion Orthopaedic trauma remains an essential service which has always had to overcome the challenges of capacity and resources in busy cities like London. Despite the reduction in trauma volume during the COVID-19 lockdown there have still been significant pressures on the health care system due to new challenges in the face of this new disease. By understanding the effects of the lifestyle restrictions brought about by the lockdown on trauma services as well as the impact of COVID-19 on service delivery measures such as length of surgery and stay, health care managers can plan for service delivery in the future as we attempt to return to nonemergency orthopaedic services and move lockdown restrictions are eased.
Branding in the eye of the storm: the impact of brand ethical behavior on brand commitment during the COVID-19 crisis in a South American country
Authors: Siqueira Junior Jose Ribamar , ter Horst Enrique , Molina German , Gunn Laura H. , Reinoso-Carvalho Felipe , Sezen Burcu , Peña-García Nathalie 
Published: October 2022

AbstractThe purpose of this study is to determine how consumer perceptions of brand ethical behavior can affect their commitment to brands during turbulent times. A study of the effects of perceived ethical behavior of brands in Colombia during the initial months of the COVID-19 outbreak was conducted in May 2020 in Bogota, Colombia, to ascertain customer perception of brand ethical actions during the first 2 months of the COVID-19 outbreak. A Bayesian model was developed to assess the impact of brands' ethical behavior on brand recognition benefits, brand image, and brand commitment. The selection of the initial months of the outbreak for this project was important because the COVID-19 pandemic had the potential to augment consumer perception of brands' ethical actions at a pivotal moment in consumers' lives. Our findings demonstrate that customers expressed a positive perception of brands' ethical actions during the early months of the pandemic, which resulted in high commitment intention to these brands in the model examined. The findings highlight the critical nature of the perception of ethical behavior in the eyes of customers during a major global health crisis. More than ever, organizations must commit their brands to fully live out their publicly expressed ethical principles and continuously monitor consumer perceptions of brand attributes and behaviors associated with ethical actions regardless of market conditions. Commitment to living the brand's stated ethical principles can be demonstrated via branding activities in ways that can be especially welcomed by customers during turbulent times. The insights mentioned in this article are crucial for brands already present in South America or exploring expansion into these regions. The findings provide compelling evidence of the impact of ethical actions on consumer commitment to brands, suggesting that brands must now, more than ever, stay in touch with their customers and truthfully live the ethical values they transmit to customers.
Synthesis of two quasi-optical polarizers for the multi-frequency high-power millimeter wave system
Authors: Chen X. X. , He S. F. , Xia D. H. , Wang Z. J. , Pan Y. 
Published: October 2022

Millimeter wave systems based on powerful gyrotron can deliver megawatt microwave power, which is an important auxiliary heating method for magnetic confinement fusion devices. Reflective gratings are normally used as quasi-optical polarizers for polarization control of the wave in such systems. Based on the coordinate transformation method, we developed a numerical code to study the broadband polarization strategy. By considering the synthesis of two polarizers, we designed a pair of polarizers in the W band. Calculation results indicated that almost arbitrary polarization can be achieved in a wide frequency range. To verify the design, we set up a low-power test platform and experiments were carried out. The performance of the polarizers was tested from 80 to 105 GHz with a step of 5 GHz. The test results agreed well with the numerical results, indicating that the design is reasonable. With the development of multi-frequency gyrotrons, the study in this paper can be used as a reference for the design of broadband polarizers of multi-frequency millimeter wave systems.
Effect of temperature on CO oxidation over Pt(111) in two-dimensional confinement
Authors: Tiwari Nidhi , Hariharan Seenivasan , Tiwari Ashwani K. 
Published: October 2022

Confined catalysis between a two-dimensional (2D) cover and metal surfaces has provided a unique environment with enhanced activity compared to uncovered metal surfaces. Within this 2D confinement, weakened adsorption and lowered activation energies were observed using surface science experiments and density functional theory (DFT) calculations. Computationally, the role of electronic and mechanical factors responsible for the improved activity was deduced only from static DFT calculations. This demands a detailed investigation on the dynamics of reactions under 2D confinement, including temperature effects. In this work, we study CO oxidation on a 2D graphene covered Pt(111) surface at 90 and 593 K using DFT-based ab initio molecular dynamics simulations starting from the transition state configuration. We show that CO oxidation in the presence of a graphene cover is substantially enhanced (2.3 times) at 90 K. Our findings suggest that 2D confined spaces can be used to enhance the activity of chemical reactions, especially at low temperatures.
Who’s speaking for whom?
Authors: Xiang Mingjian , Pascual Esther , Ma Bosen 
Published: October 2022

AbstractThis paper deals with rhetorically intended questions in theZhuangzi, a foundational text of Daoism (fourth centurybc). Such questions are generally meant to evoke silent answers in the addressee’s mind, thereby involving a fictive type of interaction (Pascual 2006,2014). We analyse rhetorical questions as constructions of intersubjectivity (seeVerhagen 2005,2008), involving not just a conceptual integration of question and assertion but also a viewpoint blend (Dancygier and Sweetser [eds] 2012). They involve fusing the perspectives of the writer, the assumed prospective readers, and possibly also that of the discourse characters (in the case of rhetorical questions ascribed to a discourse character but meant to represent the writer’s voice). In this highly influential text with abundant mixed viewpoint scenarios, the interpretation of rhetorical questions involves the resolution of different viewpoints, which are set up and shifted in a multi-layered manner for particular argumentative purposes.
Between two fires
Authors: Ravyse Natasha , van Zyl Adriana J. M. 
Published: October 2022

AbstractThis article focuses on the advocacy of social justice through the implementation of language policies in South African universities. Noting the multilingual complexity of South Africa with 111official languages and the intricacies surrounding South Africa’s political and sociocultural borders, the submission explores the advocacy of social justice in informing the reappraisal and the ensuing implementation of such a language policy by exploring constitutive dimensions (specifically identity) and instrumental dimensions (non-identity/functional aspects) from a linguistic justice perspective. The institution used as a case study is the North-West University (NWU) which is a by-product of three campuses that were merged in 2004. The authors use survey data eliciting opinions about revising the institution’s language policy. Central to the analysis is how linguistic justice could be exercised in consideration of constitutive vs instrumental dimensions based on the work ofDe Schutter (2007). With 20, 000 responses, the authors used a qualitative analysis, supplemented by frequencies, to tease apart identity and non-identity aspects to determine which of these had a closer relationship with linguistic justice and the selected institution’s language policy. The results of this study aim to offer insight into future revisions of higher education language policies in order to fulfil the mandate of linguistic justice.
Growth of delafossite CuAlO2 single crystals in a reactive crucible
Authors: Kim Du Hyung , Kong Minsik , Kang Myeongjun , Kim Minjae , Kim Seohee , Kim Youngwook , Yoon Sangmoon , Ok Jong Mok 
Published: October 2022

Abstract
Delafossite oxide CuAlO2 has received great attention as a promising p-type conducting oxide. In this work, high-quality CuAlO2 single crystals with a size of several millimeters (mm) are successfully synthesized with a reactive crucible melting method. The crystals are characterized by x-ray diffraction, scanning electron microscopy with energy-dispersive spectroscopy, transport measurement, and magnetic susceptibility measurement. The CuAlO2 single crystals show semiconducting behavior with hole carriers, which is consistent with other crystals grown by the conventional slow-cooling method. This growth method we reported here eliminates the process of removing the remaining flux, allowing easy access to the high-quality single crystals. This new approach to growing high-quality delafossite oxide CuAlO2 with a few mm size is important for new technologies that demand p-type semiconductor-based device fabrication.
Fabrication of ZnO dual electron transport layer via atomic layer deposition for highly stable and efficient CsPbBr3 perovskite nanocrystals light-emitting diodes
Authors: Zhou Binze , Qin Le , Wang Pengfei , Chen Zhuo , Zang Jianfeng , Zhang Jianbing , Wen Yanwei , Chen Rong 
Published: October 2022

Abstract
Electron transport layers (ETLs) are important components of high-performance all-inorganic perovskite nanocrystals light-emitting diodes (PNCs-LED). Herein, atomic layer deposition (ALD) of inorganic ZnO layer is combined to the organic 1,3,5-Tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBi) to form dual ETLs to enhance both the efficiency and stability of PNCs-LED simultaneously. Optimization of ZnO thickness suggested that 10 cycles ALD yields the best performance of the devices. The external quantum efficiency of the device reaches to 7.21% with a low turn-on voltage (2.4 V). Impressively, the dual ETL PNCs-LED realizes maximum T
50 lifetime of 761 h at the initial luminance of 100 nit, which is one of the top lifetimes among PNCs-LEDs up to now. The improved performance of dual ETL PNCs-LED is mainly due to the improved charge transport balance with favorable energy level matching. These findings present a promising strategy to modify the function layer via ALD to achieve both highly efficient and stable PNCs-LED.
Gravitational wave interactions in Λ3 models of dark energy
Authors: Gümrükçüoğlu A. Emir , Koyama Kazuya 
Published: October 2022

Abstract
We argue that cubic order interactions between two scalar gravitons and one tensor graviton are ubiquitous in models of dark energy where the strong coupling scale is Λ3. These interactions can potentially provide efficient decay channels for gravitational waves. They can also lead to gradient instabilities of the scalar perturbations in the presence of large amplitude gravitational waves, e.g. those detected by LIGO/Virgo. In contrast with models in scalar-tensor theories, there is an infinite number of higher order interactions in generic Λ3 models, which make it difficult to predict the fate of these instabilities inferred from cubic order interactions.
4 kW narrow-linewidth fiber laser based on a simple one-stage MOPA structure
Authors: Tian Xin , Rao Binyu , Wang Meng , Xi Xiaoming , Wang Chongwei , Wang Zefeng 
Published: October 2022

Abstract
One-stage master oscillator power amplification (MOPA) structure is a simple and robust way to acquire high-power narrow-linewidth fiber lasers (NLFLs), which have wide applications in spectral/coherent beam combination. In this work, an NLFL system was established based on a home-made fiber oscillator seed. By using this one-stage MOPA system, a 4 kW output power was achieved with 3 dB linewidth of about 0.53 nm and optical-to-optical conversion efficiency of 76.9%. The signal to Raman ratio was ∼22 dB. The measured beam quality (M2 factor) was about 1.6 at the output power of 3780 W then degraded to 2.8 at the maximum power of 4 kW. To the best of our knowledge, the 4 kW is the highest output power for such narrow linewidth one-stage MOPA fiber lasers.
Liquid crystal electro-optical transducers for electrophysiology sensing applications
Authors: Al Abed Amr , Wei Yuan , Almasri Reem M , Lei Xinyue , Wang Han , Firth Josiah , Chen Yingge , Gouailhardou Nathalie , Silvestri Leonardo , Lehmann Torsten , Ladouceur François , Lovell Nigel H 
Published: October 2022

Abstract

Objective. Biomedical instrumentation and clinical systems for electrophysiology rely on electrodes and wires for sensing and transmission of bioelectric signals. However, this electronic approach constrains bandwidth, signal conditioning circuit designs, and the number of channels in invasive or miniature devices. This paper demonstrates an alternative approach using light to sense and transmit the electrophysiological signals. Approach. We develop a sensing, passive, fluorophore-free optrode based on the birefringence property of liquid crystals (LCs) operating at the microscale. Main results. We show that these optrodes can have the appropriate linearity (µ ± s.d.: 99.4 ± 0.5%, n = 11 devices), relative responsivity (µ ± s.d.: 57 ± 12%V−1, n = 5 devices), and bandwidth (µ ± s.d.: 11.1 ± 0.7 kHz, n = 7 devices) for transducing electrophysiology signals into the optical domain. We report capture of rabbit cardiac sinoatrial electrograms and stimulus-evoked compound action potentials from the rabbit sciatic nerve. We also demonstrate miniaturisation potential by fabricating multi-optrode arrays, by developing a process that automatically matches each transducer element area with that of its corresponding biological interface. Significance. Our method of employing LCs to convert bioelectric signals into the optical domain will pave the way for the deployment of high-bandwidth optical telecommunications techniques in ultra-miniature clinical diagnostic and research laboratory neural and cardiac interfaces.
Study on the influence of grid connected capacity difference of photovoltaic power generation on power grid performance
Authors: Tan Zhiguang , Wu Ning , Zheng Yi , Chen Weidong 
Published: October 2022

Abstract
Due to the integration of photovoltaic power generation system, the structure of traditional distribution network will change, and then the grid system after grid connection is in an abnormal working state. If relevant measures are not taken, the operation quality of grid cannot be guaranteed. Therefore, based on the working principle of photovoltaic cells, this paper studies its equivalent model and output characteristics, builds a single-stage three-phase photovoltaic grid connected system on PSCAD platform, verifies the correctness of power control strategy, analyses the impact of photovoltaic grid connection on distribution network loss and voltage, establishes a 33 node model for example analysis, and simulates the grid connection of photovoltaic power generation system under different capacities and locations for many times, the calculation example of determining the location and capacity of photovoltaic grid connected power generation system is analysed, and a multi-objective mathematical model is proposed based on DG cost and active power loss. The installation quantity, capacity and location of DG are deeply studied, and the optimization function is carried out based on genetic algorithm, so as to realize the minimum impact condition of photovoltaic grid connected power generation on power quality of distribution network, and then realize the optimal configuration of photovoltaic power generation system.
Research on decentralized autonomous fault processing of distribution network based on data twin Technology
Authors: Yang Shuangshuang , Bai Huifeng , Huo Chao , Zhang Ganghong 
Published: October 2022

Abstract
With the development of new power system construction, distribution network as an important part, its safe and stable operation is more important. In order to make the distribution network have self-identification, self-positioning and self-healing functions, it is necessary to study the decentralized autonomous technology of the distribution network, including the state assessment and fault location technology of distributed power supply. In this paper, the autonomous intelligent agent unit (IA) is designed based on digital twin technology, which has the functions of state assessment, fault location and isolation. Through IEEE33-node with distributed power supply and MA-PSO algorithm, the internal autonomy of IA is simulated and analyzed. The results show that the proposed scheme and algorithm are fast, accurate and referable.
Electric Vehicle Battery Power Estimation and Remote Monitoring Method Based on Optimization Algorithm
Authors: Wang Jiaying , Ye Shen , Xu Yongjin , Wang Lixin , Yuan Jian , Wang Jinrong 
Published: October 2022

Abstract
With the leap-forward development of China’s economy and society, people have put forward higher demands for travel convenience. As a daily means of transportation, automobiles have gradually approached thousands of households. Therefore, the automobile industry has also developed rapidly in recent years. The construction of digital factories for automobile manufacturing and production has rapidly promoted the progress of the new energy automobile industry. The main purpose of this paper is to study the battery power estimation and remote monitoring program of electric vehicles based on the optimization algorithm. This paper mainly selects the battery model, compares and analyzes different algorithms, and completes the database design and the construction of the relevant development environment according to the functional requirements and combined with the actual situation. Experiments show that low temperature has a great influence on the discharge capacity of the battery. The battery can release 74% of the rated capacity at -5°C, while the battery can release only 56% of the rated capacity at -20°C.
Optimisation of regional energy demand networks based on flexible load model
Authors: Wang Zhiliang , Li Xianan , Liu Kunmin , Zhao Long 
Published: October 2022

Abstract
The existing literature on integrated energy station-grid planning studies focuses on configuration planning. Therefore, a multi-objective hybrid particle swarm algorithm is used in this paper to solve a multi-objective optimisation model and combines a multi-indicator evaluation method based on evidence-based reasoning to select the solution with the highest evaluation value from multiple candidates (Pareto solution set) as the optimal solution. The optimal planning solution is selected from multiple candidates (Pareto solution set) by a multi-indicator evaluation method based on evidence-based reasoning, and the effectiveness of the proposed model is verified utilizing an example. The customer participation demand response optimises the demand curve by adjusting the flexible load, reduces the system operation cost and investment construction cost, and maximises the economic, environmental and reliability benefits of the integrated regional energy station grid.
Optimized Photoelectric Performances via Composition Regulation of Precursor Solutions in CsPbI3 Perovskite Solar Cells
Authors: Dai Chuanru 
Published: October 2022

Abstract
The composition of precursor solutions always significantly impacts the morphology and properties of perovskite films, which plays an important role in the final performance of the solar cells. Here, PbI2 and DMAPbI3 were introduced in the CsPbI3 precursor solutions. The optimized composition and structure were realized by adjusting the content ratio of the two components. The optimum content ratio of PbI2 and DMAPbI3 was about 3:7, which results in a uniform film with optimized internal defects. Thus, the subsequent grain formation and growth process during the annealing process are better controlled. Finally, the obtained perovskite solar cells realized a power conversion efficiency (PCE) of 16.13%.