bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimization of a two‐color reuse scheme in multi‐beam high throughput satellite systems
Authors: Shao Weidong , Zhai Shenghua , Hui Tengfei , Zhang Xin‐Gang , Li Jiahong 
Published: January 2025

AbstractIn this letter, we propose a two‐color reuse scheme in the forward link of multi‐beam high throughput satellite systems, where dual‐polarization is utilized to provide an additional dimension to isolate severe inter‐beam interference. This scheme is optimized through formulating a nonconvex optimization problem with respect to precoding design to maximize system sum rate, taking into account the intense interference among beams using the same polarization. Then a path‐following algorithm is proposed for its solution. Afterwards, we further seek a low‐complexity precoding design and simplify the original precoding optimization problem into a power allocation one, whose problem is still non‐convex and a quadratic transform algorithm is proposed to achieve its near‐optimum. Extensive simulations verify that the proposed scheme exhibits improved sum rate, compared to that of the current single polarization full frequency reuse and four‐color frequency reuse ones.
Stability analysis of an observer‐based nonlinear model predictive controller for resonant grounded power distribution systems
Authors: Fernando Warnakulasuriya Sonal Prashenajith , Mahmud Md Apel , Islam Shama Naz 
Published: January 2025

AbstractThis article presents the stability analysis of a resonant grounded power distribution system (RGPDS) in which a nonlinear model predictive controller (NMPC) with a nonlinear extended state observer (NLESO) is used to achieve the desired fault current compensation through the residual current compensation (RCC) inverters. The detailed model of the system is developed to appropriately model nonlinearities so that these can be represented as an extended state and estimated using the ESO. The closed‐loop model of the system is developed in the discrete‐time to conduct the frequency‐domain analysis using two different methods, for example, the describing function (DF) method and Tsypkin criterion. The main target of these analyses is to gain useful insights on different control parameters and get an idea about their effects on the overall stability of the RGPDS with an REFCL. The relationship between the Nyquist plot and the trajectory of the key control parameter is used to determine the boundary up to which the control parameter can be adjusted to maintain the stability of the system. Finally, it is identified that the Tsypkin criterion allows more flexibilities compared to the DF method for selecting the control parameter.
Design and verification of a cascaded nanosecond rise time high‐voltage positive‐polarity square wave power supply topology
Authors: Yan Hao , Li Xuebao , Pan Yan , Jin Rui , Zhao Zhibin 
Published: January 2025

AbstractHigh‐voltage SiC devices operate under repetitive positive polarity square wave voltages with rise times ranging from tens to hundreds of nanoseconds. Under these conditions, the partial discharge and withstand voltage characteristics differ significantly from those observed in traditional AC and DC tests. Therefore, there is an urgent need to conduct insulation assessments for devices under square wave conditions, which necessitates the development of a high‐voltage positive polarity square wave power supply with flexible nanosecond rise times suitable for SiC applications. This paper addresses the need to simulate the actual voltage conditions experienced by SiC devices and proposes a high‐voltage positive polarity square wave power supply topology using cascaded low‐voltage square wave generation units. The working principle is explained in detail, along with the main hardware design and parameter selection methods. Transient simulation models for both normal and single‐stage fault conditions were established, verifying the proposed topology's ability to flexibly adjust square wave output parameters such as frequency, rise time, and duty cycle, as well as its ability to continue operating in fault conditions even with single or multiple switch failures. Finally, a 5‐stage cascaded high‐voltage positive polarity square wave power supply prototype was developed, achieving flexible and independent control of all switching devices through a field‐programmable gate array. The prototype achieved performance parameters of 4 kV voltage level, repetition frequency of DC to 5 kHz, duty cycle of 0% to 100%, and voltage rise time of 80 to 300 ns, validating the overall feasibility and reliability of the proposed topology. The research findings in this paper provide new design ideas for the development of square wave power supplies and offer a power source for the insulation assessment of SiC devices.
A data association algorithm based on the minimal angular distance sum for angle‐only measurements with the sensor position unknown
Authors: Ma Feng , Lu Huanzhang , Shen Xinglin 
Published: January 2025

AbstractData association technology can determine the corresponding relationships between target data (measurements or tracks) on different platforms, laying the foundation for target allocation and collaborative strikes. For targets with smaller volumes and similar appearances, such as drone swarms and warhead swarms, angle measurement provides important information for the use of passive optical sensors to associate target data. The classic data association technology for angle‐only measurement relies on precise knowledge of the sensor position, hindering their application to drone swarms or other low‐cost mobile platforms. This paper proposes a data association algorithm based on the minimum angular distance sum, whose calculation process does not involve the sensor position information, making angle‐only measurement data association technology independent of the sensor position information. Both the simulation results and the experimental results validated the effectiveness of the proposed algorithm.
Advances in non‐intrusive type I load monitoring using R‐statistic steady‐state detection and subtractive clustering
Authors: Savastio Luigi Pio , Brescia Elia , De Tuglie Enrico Elio , Tipaldi Massimo , Cascella Giuseppe Leonardo , Surico Michele , Conte Giovanni , Polichetti Andrea 
Published: January 2025

AbstractThis paper introduces a novel unsupervised method that uses advanced clustering techniques based on power and time features to identify Type 1 electrical load profiles within aggregated power measurements. The adoption of the R‐statistic algorithm for the detection of ON/OFF events enhances the algorithm's performance, enabling it to capture and accurately reconstruct both slow and fast dynamic loads. A double clustering approach also guarantees that signals exhibiting identical power levels but different durations are distinctly recognised, allowing for accurate identification of individual appliances within aggregated power data. This way, the combination of clustering techniques with R‐statistic improves the granularity of load profile analysis and overcomes traditional barriers in power consumption monitoring. Both simulation and experimental results are presented to evaluate and compare the performance of the proposed method to existing approaches from the literature.
Gastrointestinale Erscheinungsformen der systemischen Mastzellaktivierungserkrankung – Eine praxisorientierte Einführung in Klinik, Diagnostik und Therapie
Authors: Raithel Martin , Homann Jürgen , Rieker Ralf J. , Molderings Gerhard J. 
Published: January 2025

ZusammenfassungBei der systemischen Mastzellaktivierungserkrankung (MCAD) handelt es sich um eine epigenetisch und genetisch bedingte Krankheitsentität mit sehr ausgeprägtem Krankheitsbild in vielfältigen klinischen Manifestationen in potenziell jedem Organ und Gewebe aufgrund unangemessener Freisetzung von Mastzellbotenstoffen zusammen mit der Anhäufung von sowohl morphologisch normalen und mutierten Mastzellen. Die Prävalenz der Erkrankung beträgt in Deutschland 17%, sodass Gastroenterologen und Endoskopiker im klinischen Alltag häufig unwissentlich mit einer MCAD konfrontiert werden. Darüber hinaus sind gastroenterologische Untersuchungen ein wesentlicher Bestandteil in der Diagnostik der MCAD. Daher ist es für jeden gastroenterologisch tätigen Arzt unabdingbar, über Grundkenntnisse dieser Erkrankung zu verfügen und insbesondere über deren Problematik auf dem gastroenterologischen Gebiet informiert zu sein. Diese Übersicht fasst den aktuellen Wissensstand zu Ursachen, Diagnostik und Therapie der hochkomplexen MCAD auf die gastroenterologischen Aspekte fokussiert zusammen.
Endoscopic hemostasis with a self-expandable metal stent as bridge therapy for hemobilia
Authors: Kim Junyeol , Choi Jin Ho , Lee Tae Seung , Lee Myeong Hwan , Cho In Rae , Paik Woo Hyun , Ryu Ji Kon , Kim Yong-Tae , Lee Sang Hyub 
Published: January 2025

AbstractManagement of hemobilia is often challenging. Recently, endoscopic hemostasis with a self-expandable metal stent (SEMS) has shown promising efficacy for controlling bleeding at the endoscopic sphincterotomy site. This study aimed to assess efficacy and feasibility of endoscopic hemostasis as bridge therapy for hemobilia.Patients with hemobilia between 2008 and 2023 were retrospectively reviewed. We compared efficacy of hemostasis between the initial endoscopic hemostasis group (ENDO group) and the initial angiographic embolization group (EMBO group). The primary outcome was initial hemostasis success rate and the secondary outcomes were delayed bleeding rate, subsequent embolization rate, 28-day mortality, transfusion amount, time to first hemostasis, total hemobilia time, and incidence of hypovolemic shock.A total of 26 patients with hemobilia were included in this study and 17 patients (65.4%) were identified as the ENDO group and nine patients (34.6%) were classified as the EMBO group. The success rate of initial hemostasis was 88.2% (15/17) in the ENDO group and 100% (9/9) in the EMBO group (P = 0.529). The rate of delayed bleeding in the ENDO group was 17.6% (3/17) and 0.0% (0/9) in the EMBO group (P = 0.529). Total hemobilia time was shorter in the ENDO group than in the EMBO group (mean: 281.5 ± 1022.4 minutes vs. 5002.8 ± 7982.6 minutes; P < 0.001) Stent insertion depth was associated with successful hemostasis without delayed bleeding. (P = 0.015).Endoscopic hemostasis using SEMS for hemobilia appeared to be a feasible bridge therapy.
Nickel(II)-Catalyzed Cycloisomerization of 1,6-Dienes
Authors: Du Zhongjian , Ji Chenlei , Wang Xu , Zhang Sijian , Wang Zhenyu , You Yang'en 
Published: January 2025

AbstractA nickel-catalyzed protocol for the cycloisomerization of 1,6-dienes has been developed. Using commercially available NiBr₂ and PPh₃ as catalysts, Zn as a reductant, and ZnI₂ as an additive, the methodology efficiently converts various 1,6-dienes into pyrrolidine derivatives in excellent yields and high selectivity.
Indocyanine Green Fluorescence-Guided Surgery in Pediatric Hepatobiliary Procedures: A Feasibility Study for Improved Intraoperative Visualization
Authors: T.K Jayakumar , Rathod Kirtikumar Jagdish , Saxena Rahul , Pathak Manish , Jadhav Avinash S. , Nayak Shubhalaxmi , Varshney Vaibhav , Soni Subhash Chandra , Sinha Arvind 
Published: January 2025

Introduction Indocyanine green (ICG) fluorescence-guided surgery (FGS) is reported extensively in adult operations, but its safety and applications in pediatric populations remain to be comprehensively understood. The dose, administration protocols, and intraoperative imaging benefits in pediatric hepatobiliary operations are not clear.
Objectives This study aimed to identify the feasibility and applications of ICG FGS in hepatobiliary surgeries (for biliary atresia, choledochal cyst, and cholelithiasis) in children.
Methods This is a prospective observational study conducted from January 2021 to December 2022. A standard ICG dose of 0.5 mg/kg/dose was administered intravenously to children undergoing operations for biliary atresia (18–24 hours), choledochal cyst (12–18 hours), and cholelithiasis (2–6 hours) before the operation. Intraoperative imaging features and adverse events were recorded.
Results ICG FGS was performed in 17 patients. In biliary atresia (n = 9), liver fluorescence varied in each case, the gallbladder did not show fluorescence, and there was increasing fluorescence as we reached the right depth during the excision of fibrous biliary remnants. In choledochal cyst (n = 6) operations and cholecystectomy (n = 2), real-time imaging provided anatomical details of the biliary tree and helped in safe dissection. No ICG-related adverse events occurred.
Conclusion ICG FGS appears safe, feasible, and beneficial in pediatric hepatobiliary surgeries. For conditions like biliary atresia, choledochal cysts, and cholecystectomy, ICG facilitates safer surgical navigation and may reduce intraoperative complications. Future studies with standardized protocols and quantitative fluorescence assessment are needed to further refine its use and confirm its impact on surgical outcomes.
Influencing factors and mechanisms on self-governed rural public open space quality: a conceptual social-ecological system (SES) framework
Authors: Shi Xuerui , Ling Gabriel Hoh Teck 
Published: January 2025

AbstractSelf-governed public open spaces (POSs) face challenges related to collective action dilemmas, specifically the Hardinian tragedy of the commons and underinvestment. Despite extensive research on social-ecological systems (SES) addressing human-environment issues, there has been no quantitative empirical investigation into the determinants of governance in rural POSs. This study, operationalizing McGinnis and Ostrom’s SES framework and incorporating collective action theories, identifies institutional-social-ecological factors affecting the quality of self-governed POSs in rural China. Questionnaires were distributed to 594 households in 198 villages in Taigu via random sampling. The study employed PLS-SEM and mediation models to identify 15 key SES factors, including 4 institutional factors, 7 social factors, and 4 ecological factors. These variables impact the perceived quality of POSs either directly or through mediation by incentive activities, collective investment, and self-organizing activities. Based on the research findings, the study proposes five policy implications for the self-governance of rural POSs in China. The study not only contributes to the development of an SES-based POS governance framework, but it also offers policy insights into the significance of SES factors and ways to incentivize collective action for effective self-governance of rural public open spaces in China.
Embodied aesthetics and populist appeal of communist portraits in contemporary Kerala
Authors: Anil Anagha 
Published: January 2025

AbstractIn contrast to their career in the rest of India, the Communist Party of India (Marxist) [CPI (M)] continue to thrive as a highly successful electoral and cultural force in Kerala. Popularly known as the ‘Party’, an important aspect of CPI(M) has been its populist streak even though its official discourse is one that strongly adheres to rule-based reasoning by prioritizing ideological principles in its policies and decisions. The populist streak often manifests through myths and cultic adoration built around its leaders as well as through the occasional branding of Indian judiciary and democracy as bourgeois. It is further characterized by a strong ‘us vs. them’ rhetoric in which the ‘them’ is a powerful other, variously identified as CIA (Central Intelligence Agency of the US), or the media syndicate, or the government of the Indian Union, etc. Usually, the Communist Party is studied only with reference to its history and policies, and it has seldom been interrogated on the affective energies it generates in the everyday. This paper proposes to discuss communist iconography, such as portraits of yesteryear leaders circulated via social media and displayed in communist family homes, as sites where affective energies are generated and realised. Taking its cue from Christopher Pinney’s corpothetics, the paper intends to study this visual practice as an embodied aesthetic engagement, which by invoking filial sentiments, renders the Party felt for its supporters. By drawing on the concept of darshan, the ritualistic and devotional viewing of deities, the paper endeavours to place the affectivity of these portraits in a broader cultural milieu.
How did the Brexit uncertainty impact services exports of UK firms?
Authors: Du Jun , Shepotylo Oleksandr , Yuan Xiaocan 
Published: January 2025

Abstract
This paper examines the impact of Brexit-related uncertainty on the UK’s trade in services, with a focus on how different types of international business policy uncertainty (IBPU) influence export participation and intensity. Leveraging a novel conceptual framework, we integrate multiple layers of uncertainty—including regulatory, legal, and market-based factors—into an analysis of UK firms’ strategic decisions in an open economy. Drawing on firm-level data from Bureau van Dijk’s Orbis database and a synthetic control method, we estimate that Brexit uncertainty led to a 9.2% annual reduction in UK services exports, equivalent to a cumulative loss of USD 146.8 billion between 2016 and 2019. Our findings show that Brexit-related uncertainty disproportionately affected small and medium-sized enterprises (SMEs), while multinational enterprises (MNEs) were more likely to relocate operations outside the UK, exacerbating trade declines. This research highlights the critical role of transparent and predictable regulatory frameworks, risk management policies, and transitional support measures to mitigate the adverse effects of prolonged uncertainty. By identifying the specific mechanisms through which uncertainty shapes export decisions, this study offers key insights for policymakers aiming to foster resilience in the UK’s services trade post-Brexit.
An improved GAN-based data augmentation model for addressing data scarcity in SRMs
Authors: Yang Huixin , Xiang Zijian , Li Xiang , Zhang Wei 
Published: January 2025

Abstract
In the domain of solid rocket motors (SRMs), acquiring experimental data is a costly endeavor, and fully simulating flight conditions presents significant challenges, making it difficult to gather a sufficient amount of data for each operational scenario. The application of deep learning architectures in the field of SRMs is further complicated by issues of data scarcity and dataset imbalance. To address these challenges, this paper proposes an enhanced generative adversarial network (GAN)-based data augmentation model, referred to as CWGAN-GP-T. This model aims to effectively augment and balance the experimental dataset of SRMs, thereby improving the regression prediction performance of deep learning architectures utilizing SRM data. By leveraging the CWGAN-GP-T framework, pseudo-samples are generated based on the experimental dataset from the SRMs ignition process. The results demonstrate the efficacy of the proposed method in expanding the dataset and ensuring a more balanced distribution of samples across various operating conditions. Comparative experiments are conducted with alternative regression prediction methods and GAN-based data augmentation techniques, validating the superior accuracy of deep convolutional neural networks in predicting the performance of SRMs using datasets augmented by the CWGAN-GP-T method. These findings highlight the exceptional generative capabilities of the proposed model and emphasize its potential impact on advancing research in the field of SRMs.
A whole gamma imaging prototype for higher quantitative imaging of 89Zr-labeled antibodies in a tumor mouse model
Authors: Takyu Sodai , Tashima Hideaki , Takahashi Miwako , Yoshida Eiji , Wakizaka Hidekatsu , Obata Fujino , Akamatsu Go , Nagatsu Kotaro , Sugyo Aya , Sudo Hitomi , Tsuji Atsushi B , Ishibashi Mariko , Imai Yoichi , Parodi Katia , Yamaya Taiga 
Published: January 2025

Abstract

Objective. Positron emission tomography (PET) has become an important clinical modality, but it is limited to imaging the annihilation radiation from positron–electron collisions. Recently, PET imaging with 89Zr, which has a half-life of 3 d, has attracted much attention in immuno-PET to visualize immune cells and cancer cells by targeting specific antibodies on the cell surface. However, 89Zr emits a single gamma ray at 909 keV four times more frequently than positrons, causing image quality (IQ) degradation in conventional PET. To overcome this drawback, use of such single gamma rays for imaging was previously proposed as whole gamma imaging (WGI). In WGI, a single gamma ray is detected by Compton imaging; by inserting a scatter detector ring inside the PET ring, WGI can realize both PET imaging and Compton imaging in one modality. A prototype for WGI was developed and Compton imaging of a mouse after intravenous administration of 89Zr oxalate was demonstrated. However, the Compton imaging of the single gamma ray still presented a challenge due to its low IQ compared to PET. Approach. In this study, the scatter detector insert of the earlier WGI prototype was redesigned with the aim of improving Compton imaging performance. The new prototype produced WGI images by additive averaging of PET and Compton images after optimizing the ratio of each iteration in the image reconstruction. WGI IQ was then evaluated using the NEMA NU4 IQ phantom, and a tumor-burdened mouse was imaged with WGI up to 12 d after 89Zr labeled antibody injection. Main results. Consequently, the Compton imaging performance was improved by lowering the angular resolution measure from 6.7 degrees to 6.4 degrees and the sensitivity from 0.11% to 0.18% compared to the previous prototype WGI. The phantom images with WGI showed a 15% reduction in noise and a 3% increase in contrast recovery under low-statistical conditions compared to images reconstructed by PET data alone. Significance. In-vivo mouse imaging with the new prototype WGI was successfully performed. This successful imaging leads to the expectation that future whole-body WGI imaging will enable more sensitive and better quantitative 89Zr antigen-antibody reaction imaging to be obtained.