bluuebunny/crossref_metadata_2025_split huggingface dataset:
Collision and obstacle avoidance for agents based on velocity programming in unknown environments under kinematical constraints
Authors: Xiong Zhigang , Luo Yasong , Liu Zhong , Zhang Jianqiang , Liu Zhikun 
Published: March 2023

AbstractThis paper conducts research on obstacle and collision avoidance under kinematical constraints in unknown environments, while communication and simultaneous localization and mapping (SLAM) are unavailable to agents. Then a strategy based on mixed‐integer programming is proposed, in which velocity constraints are established with a modified Barrier function for obstacles that can be completely detected. As for obstacles that cannot be completely detected, a feasible set is built for the velocity programming based on the convex theory, and the contradicted constraints are addressed with the logic metric method. Besides, the actuator saturation is avoided by converting kinematical constraints into the restrictions on the magnitude, the restrictions on the direction, and the negative correlations between the components of the velocity respectively. Given that invalid nominal velocity leads to collisions, a virtual goal is estimated for nominal velocity improvement. In addition, the local extremum brought by empty programming space due to multiple constraints is repaired by fixing the velocity constraints. The feasibility of the proposed strategy is analyzed, and numerical simulations are provided to verify the effectiveness of the proposed strategy.
Optimal coordination of distance relays and non‐standard characteristics for directional overcurrent relays using a modified African vultures optimization algorithm
Authors: Korashy Ahmed , Kamel Salah , Jurado Francisco , Eslami Mahdiyeh 
Published: March 2023

AbstractHere, an improved version of an African vultures optimization algorithm (AVOA), known as MAVOA is applied to solve the coordination issue between distance relays and directional overcurrent relays (DOCRs). The suggested method enhances the balance between exploration and exploitation features for the AVOA algorithm in order to find the optimal DOCR settings and operating time for zone‐2 distance relays. In 8‐bus, IEEE 30‐bus, and IEEE 39‐bus networks, the ability of the MAVOA technique to find the optimal solution for the coordination between DOCRs and distance relays is evaluated. Both MAVOA and AVOA algorithms are assessed in the case of standard and non‐standard DOCR characteristic curves. The results indicate the significant superiority of the suggested MAVOA algorithm in solving the coordination issue of the combined DOCR and distance relays. The reduction in operating time for DOCRs and zone‐2 of distance relays decreased by about 30% compared to the conventional AVOA technique. The results also prove the MAVOA's superiority over the recently developed algorithm and other algorithms in solving the coordination problem of the combined DOCRs and distance relays. Additionally, the total operating time for the non‐standard characteristic curve for DOCRs results in a reduction of the overall operating time of primary relays of more than 15%.
A comprehensive review of reliability assessment methodologies for grid‐connected photovoltaic systems
Authors: Singh Smriti , Saket R. K. , Khan Baseem 
Published: March 2023

AbstractThis paper provides a comprehensive review of the research work related to Reliability Assessment Methodologies for grid‐connected photovoltaic (PV) systems performed in recent literature. Solar power is emerging as the fast growing source of energy in the world as a result of rising environmental concerns regarding the hazards of climatic change linked with the production of electricity using fossil fuels. Although PV systems can support small businesses and households on their own, many people prefer a grid‐connected PV system (PVS) because of the net profit it provides. Grid‐integrated PV system, however, comes with many reliability issues. Evaluating the reliability of grid‐integrated photovoltaic system is thus an important area of research. The article presents a critical survey of the state‐of‐art technologies for assessing the reliability of a PV system. Issues related to the reliability of the grid‐integrated PVS are spotted along with the solution techniques. Reliability indices for analyzing the PVS performance are also discussed.
Designing wavelength sampling for Fabry–Pérot observations
Authors: Díaz Baso C. J. , Rouppe van der Voort L. , de la Cruz Rodríguez J. , Leenaarts J. 
Published: March 2023

Context. Fabry–Pérot interferometers (FPIs) have become very popular in solar observations because they offer a balance between cadence, spatial resolution, and spectral resolution through a careful design of the spectral sampling scheme according to the observational requirements of a given target. However, an efficient balance requires knowledge of the expected target conditions, the properties of the chosen spectral line, and the instrumental characteristics.
Aims. Our aim is to find a method that allows the optimal spectral sampling of FPI observations in a given spectral region to be found. The selected line positions must maximize the information content in the observation with a minimal number of points.
Methods. In this study, we propose a technique based on a sequential selection approach in which a neural network is used to predict the spectrum (or physical quantities, if the model is known) from the information at a few points. Only those points that contain relevant information and improve the model prediction are included in the sampling scheme.
Results. We have quantified the performance of the new sampling schemes by showing the lower errors in the model parameter reconstructions. The method adapts the separation of the points according to the spectral resolution of the instrument, the typical broadening of the spectral shape, and the typical Doppler velocities. The experiments that use the Ca II 8542 Å line show that the resulting wavelength scheme naturally places more points in the core than in the wings (by almost a factor of 4), consistent with the sensitivity of the spectral line at each wavelength interval. As a result, observations focused on magnetic field analysis should prioritize a denser grid near the core, while those focused on thermodynamic properties would benefit from a larger coverage. The method can also be used as an accurate interpolator to improve the inference of the magnetic field when using the weak-field approximation.
Conclusions. Overall, this method offers an objective approach for designing new instrumentation or observing proposals with customized configurations for specific targets. This is particularly relevant when studying highly dynamic events in the solar atmosphere with a cadence that preserves spectral coherence without sacrificing much information.
Development of adjusted nuclear data library for fast reactor application
Authors: Yokoyama Kenji 
Published: March 2023

In Japan, development of adjusted nuclear data library for fast rector application based on the cross-section adjustment method has been conducted since the early 1990s. The adjusted library is called the unified cross-section set, which is an ABBN-type group constant set with 70-group energy structure. The first version was developed in 1991 and is called ADJ91. After that, ADJ98, ADJ2000, ADJ2000R, and ADJ2010 were constantly developed. For instance, ADJ2010 was developed based on JENDL-4.0, which provides covariance data needed to apply the cross-section adjustment method, by using 488 integral experimental data acquired in typical fast reactor systems. ADJ2010 has been used as the standard cross-section set for nuclear design in the fast reactor cycle technology development project (FaCT) and the succeeding fast reactor projects. In parallel, the integral experimental data were further expanded to improve the design prediction accuracy of the core loaded with MA and/or degraded Pu. Using the additional integral experimental data, development of the next version of ADJ2017 was started in 2017. In 2022, the latest unified cross-section set AJD2017R was developed based on JENDL-4.0 by using 619 integral experimental data. An overview of the latest version with a review of previous ones will be shown.
On the other hand, the latest Japanese evaluated nuclear data library JENDL-5 was released at the end of 2021. In the development of JENDL-5, some of the integral experimental data used in ADJ2017R were explicitly utilized in the nuclear data evaluation. However, this is not reflected in the covariance data. This situation needs to be considered when developing a next version of the unified cross-section set based on JENDL-5. Preliminary adjustment calculation based on JENDL-5 is performed using C/E (calculation/experiment) values simply evaluated by a sensitivity analysis. The preliminary result of the JENDL-5-based adjustment will be also discussed.
Krafttraining bei Frauen mit generalisierter Hypermobilität: Machbarkeit, Beschwerden und Effekte – Eine Pre-post-Studie
Authors: Luder Gere , Mebes Christine Mueller , Haupt-Bertschy Bettina , Verra Martin L. , Aeberli Daniel , Baeyens Jean-Pierre 
Published: March 2023

Zusammenfassung
Hintergrund Eine generalisierte Hypermobilität liegt vor, wenn die Beweglichkeit in mehreren Gelenken das übliche Maß übersteigt. Bis zu 30 % der Frauen und 10 % der Männer sind davon betroffen. Hypermobilität ist keine Pathologie, wenn sie jedoch mit Schmerzen und weiteren Symptomen einhergeht, kann sie die Gesundheit und Alltagsfunktionen beeinträchtigen. Zur physiotherapeutischen Behandlung gibt es wenige Studien, wobei Krafttraining eine mögliche Intervention sein könnte.
Ziel Erfassung der Machbarkeit und des Effekts eines Krafttrainings für Frauen mit generalisierter Hypermobilität.
Methode Pre-post-Studie, in der hypermobile Frauen (Beighton-Score > 5) zwischen 20 und 40 Jahren während 12 Wochen ein Krafttraining an Geräten, fokussiert auf Beine und Rücken, absolvierten. Mithilfe eines Protokolls und wöchentlicher Fragebogen wurden das Training und dadurch ausgelöste Beschwerden analysiert. Vor und nach dem Training wurde die Kraft der Knieflexoren und -extensoren sowie der Muskelquerschnitt am Oberschenkel gemessen. Die Analyse erfolgte primär deskriptiv, zusätzlich erfolgte ein Vergleich von 2 Subgruppen mittels Mann-Whitney-U und Chi2-Test.
Ergebnisse 46 Teilnehmerinnen (26,3 ± 4,3 Jahre) absolvierten das Training. 6 davon brachen die Studie vorzeitig ab, davon eine wegen Rückenschmerzen aufgrund einer Diskushernie. 72,5 % der verbleibenden 40 Teilnehmerinnen absolvierten 20 oder mehr Trainings. In 34 % der Trainingswochen wurden geringe Beschwerden angegeben, mehrheitlich an Knie und Rücken. Der Einsatz der verwendeten Gewichte war oft tief, so wurde auf der Legpress mit durchschnittlich 44,8 % des Körpergewichts begonnen, nach 12 Wochen lag das Trainingsgewicht im Mittel bei 52,2 kg, was 85,7 % des Körpergewichts entspricht. Bei der Kraft und beim Muskelquerschnitt wurden keine signifikanten Verbesserungen erreicht, wobei bis zu 17 Teilnehmerinnen (42,5 %) eine Verbesserung von mehr als 10 % erreichten.
Schlussfolgerung Das Krafttraining war für die meisten Teilnehmerinnen machbar und gut verträglich. Das mehrheitlich selbstgesteuerte Training war zu wenig intensiv, um eindeutige Auswirkungen auf Kraft oder Muskelmasse zu erreichen, obwohl einzelne Teilnehmerinnen durchaus davon profitierten. In weiteren Studien sollten individuellere und enger begleitete Trainingsprogramme untersucht werden.
Der koronarkranke Diabetiker: moderne Therapieansätze und Behandlungspfade
Authors: Buchmann Nikolaus , Landmesser Ulf , Sinning David 
Published: March 2023

ZusammenfassungPatienten mit koronarer Herzerkrankung (KHK) und Diabetes mellitus Typ 2 (T2D) weisen ein besonders hohes Risiko für (rezidivierende) kardiovaskuläre Ereignisse (CVE) auf; in der
Sekundärprävention wirkt sich eine suffiziente Kontrolle der kardiovaskulären Risikofaktoren prognostisch besonders günstig aus. Für diese Patientengruppe konnte in den letzten Jahren der
kardioprotektive Nutzen der SGLT2-Inhibitoren und GLP-1-Rezeptor-Agonisten nachgewiesen werden, sodass diese Substanzgruppen mittlerweile bei der Initiierung einer medikamentösen
antidiabetischen Therapie zu bevorzugen sind. Auch lipidmodifizierende Medikamente wie die PCSK9-Inhibitoren oder Icosapent-Ethyl haben sich insbesondere bei Patienten mit KHK und T2D als
vorteilhaft erwiesen. Zudem haben sich zuletzt die Empfehlungen zum Management der Koronarrevaskularisation bei Patienten mit stabiler KHK und T2D verändert. So sollte bei Mehrgefäß-KHK und
komplexer Koronarmorphologie zwar weiterhin eine chirurgische Koronarrevaskularisation (CABG) bevorzugt empfohlen werden; bei einem niedrigen SYNTAX-Score kann die interventionelle
Koronarrevaskularisation jedoch eine gleichwertige Alternative zur CABG darstellen.
Lipidmanagement 2022 – von der Tradition zur Innovation
Authors: Reibis Rona K. 
Published: March 2023

ZusammenfassungLipoproteine niedriger Dichte (LDL-Cholesterin) spielen in der Pathogenese atherosklerotischer kardiovaskulärer Erkrankungen eine fundamentale Rolle. Moderne lipidmodifizierende Substanzen
ermöglichen additiv zur potenten LDL-C-Senkung durch pleiotrope Effekte eine Reduktion kardiovaskulärer Ereignisse und eine Prognoseverbesserung. Während Statine, Ezetimib und monoklonale
PCSK-9-Antikörper eine gesicherte Evidenz aufweisen, werden für die neueren nukleinsäurebasierten Substanzen die Endpunktdaten noch erwartet. Die langfristigen pharmakotherapeutischen
Effekte in der Lipidtherapie werden vorwiegend durch die Stringenz der Leitlinienumsetzung und der Patientenadhärenz determiniert.
Ist Stress am Arbeitsplatz ein Thema für den kardiologischen Alltag? Evidenz, Erkennung und Therapie aversiver Stressbedingungen im Arbeitsumfeld
Authors: Ladwig Karl-Heinz , Lukaschek Karoline 
Published: March 2023

ZusammenfassungIn modernen Industriegesellschaften verbringen die Menschen die aktivste Zeit ihres Lebens in beruflicher Umgebung, die damit weitgehend Alltag und Lebensqualität bestimmt. Immer mehr
verschwimmen die Grenzen zwischen Privatem und Beruflichem. Neben „klassischem“ Arbeitsstress – häufig definiert als Missverhältnis von hohen Anforderungen bei gleichzeitig geringen
Entscheidungsmöglichkeiten oder als Missverhältnis zwischen Arbeitseinsatz und Belohnung – gehören u. a. Überarbeitung, Mobbing und Arbeitsplatzverlust sowie negative Arbeitsplatzbedingungen
zu den Belastungen, die seelische und körperliche gesundheitliche Probleme auslösen können. Evidenz aus Megastudien mit > 100000 Teilnehmern belegt die Bedeutung von Arbeitsstress als
Risikofaktor (RF) für Hypertonie, Schlafstörungen und Depressionen. Unter Arbeitsstress werden häufig gesundheitsgefährdende Verhaltensweisen als Kompensationsversuche eingesetzt.
Andauernder Arbeitsstress wird damit zu einem signifikanten RF für ischämische Herzerkrankungen, zerebrovaskuläre Ereignisse und Diabetes mellitus. Arbeitsstress sollte daher in der
kardiologischen Praxis exploriert werden. Grundzüge einer auf Arbeitsstress fokussierten Gesprächsführung für den Alltagseinsatz werden vorgestellt.
Validation of an Automated Symptom-Based Triage Tool in Ophthalmology
Authors: Meer Elana , Ramakrishnan Meera S. , Whitehead Gideon , Leri Damien , Rosin Roy , VanderBeek Brian 
Published: March 2023

Abstract
Objectives Acute care ophthalmic clinics often suffer from inefficient triage, leading to suboptimal patient access and resource utilization. This study reports the preliminary results of a novel, symptom-based, patient-directed, online triage tool developed to address the most common acute ophthalmic diagnoses and associated presenting symptoms.
Methods A retrospective chart review of patients who presented to a tertiary academic medical center's urgent eye clinic after being referred for an urgent, semi-urgent, or nonurgent visit by the ophthalmic triage tool between January 1, 2021 and January 1, 2022 was performed. Concordance between triage category and severity of diagnosis on the subsequent clinic visit was assessed.
Results The online triage tool was utilized 1,370 and 95 times, by the call center administrators (phone triage group) and patients directly (web triage group), respectively. Of all patients triaged with the tool, 8.50% were deemed urgent, 59.2% semi-urgent, and 32.3% nonurgent. At the subsequent clinic visit, the history of present illness had significant agreement with symptoms reported to the triage tool (99.3% agreement, weighted kappa = 0.980, p < 0.001). The triage algorithm also had significant agreement with the severity of the physician diagnosis (97.0% agreement, weighted kappa = 0.912, p < 0.001). Zero patients were found to have a diagnosis on exam that should have corresponded to a higher urgency level on the triage tool.
Conclusion The automated ophthalmic triage algorithm was able to safely and effectively triage patients based on symptoms. Future work should focus on the utility of this tool to reduce nonurgent patient load in urgent clinical settings and to improve access for patients who require urgent medical care.
Endoscopic Management of a Complex Biliary Problem
Authors: Gattani Mayur G. , Mukewar Shrikant , Kulkarni Akshay , Bhaware Bhushan , Mukewar Saurabh 
Published: March 2023

AbstractEndoscopic interventions have become increasingly popular in the management of obstructive jaundice. In this case study, we present a case of complex Bismuth type 4 hilar stricture in an elderly lady presenting with obstructive jaundice. Complete endoscopic biliary drainage was accomplished successfully by placement of three metal stents – two with ERCP and one with Endoscopic Ultrasound (EUS) guided hepatico-gastrostomy. She developed cholecystitis later, which was successfully addressed by EUS guided gallbladder drainage using a cautery enhanced lumen apposing metal stent. Thus, a complete internal biliary drainage was achieved with endoscopic interventions.
Cancer in Anal Fistulas
Authors: Perez Sean , Eisenstein Samuel 
Published: March 2023

AbstractFistula-associated anal cancer in Crohn's disease (CD) can be challenging to diagnose and treat. Patients with longstanding fistulas in the setting of CD who present with a sudden change in their symptoms should undergo biopsy under anesthesia with extensive sampling, followed by staging imaging. Pelvic magnetic resonance imaging (MRI) can be helpful in identifying the extent of the disease locally. Patients often present in the later stages due to the challenges associated with diagnosing these patients. Two subtypes of this disease include squamous cell carcinoma and adenocarcinoma, and treatment depends on diagnosis. Small sample size and lack of uniform data on treatments make it difficult to say which treatment modalities are optimal, but aggressive combined therapy is likely the best approach for survival. This will include chemotherapy and radiation and often radical resection as well. Despite this, survival is poor, although more recent data suggest that outcomes are improving.
A Master Mind Game Code Algorithm Approach to Help Surgical Decision-Making between Retropharyngeal Fat Grafting and Pharyngoplasty for the Treatment of Velopharyngeal Incompetence
Authors: Suzzi Chiara , Di Gennaro Gianfranco , Baylon Hélène , Captier Guillaume 
Published: March 2023

Abstract
Introduction Velopharyngeal insufficiency (VPI) is a controversial pathology with many surgical options.
Objective To compare pharyngoplasty and retropharyngeal fat grafting and to build a prognostic tool to achieve perfect speech.
Methods Retrospective observational cohort study of 114 patients operated for VPI from 1982 to 2019 in a single tertiary center. The instrumental assessment was made using an aerophonoscope and nasofibroscopy. The variables sex, age, genetic syndromes, and type of diagnosis were analyzed with logistic regression model adjusted with propensity score. To generalize results and to build a surgical predictive tool, a marginal analysis concludes the study.
Results Among the patients (median [range] age 7 [4–48]), 63 (55.26%) underwent pharyngoplasty and 51 (44.74%) graft. The graft group had no complication, but it had a failure rate of 7.84%. The pharyngoplasty group had no failure, but one patient had postoperative obstructive sleep apnea. The marginal analysis demonstrated that age lower than 7 years, cleft lip and palate, absence of syndrome, and intermittent VPI were important predictive factors of good result regardless of surgical technique.
Conclusions Without a statistical demonstration of the superiority of pharyngoplasty over graft, and in the uncertainty of literature background, our perfect-speech patient profile represents an important tool for a postoperative forecast of results in which, like in the Master Mind game, every feature has to be considered not individually but as a pattern of characteristics whose association contributes to the outcome.
Fully digital platform for local ultra-stable optical frequency distribution
Authors: Matusko Martina , Ryger Ivan , Goavec-Merou Gwenhaël , Millo Jacques , Lacroûte Clément , Carry Émile , Friedt Jean-Michel , Delehaye Marion 
Published: March 2023

This article reports on the use of a Field Programmable Gate Array (FPGA) platform for local ultra-stable optical frequency distribution through a 90 m-long fiber network. This platform is used to implement a fully digital treatment of the Doppler-cancellation scheme required by fiber links to be able to distribute ultra-stable frequencies. We present a novel protocol that uses aliased images of a digital synthesizer output to directly generate signals above the Nyquist frequency. This approach significantly simplifies the setup, making it easy to duplicate within a local fiber network. We demonstrate performances enabling the distribution of an optical signal with an instability below 10−17 at 1 s at the receiver end. We also use the board to implement an original characterization method. It leads to an efficient characterization of the disturbance rejection of the system that can be realized without accessing the remote output of the fiber link.