bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improved methodology for damping sub‐synchronous oscillation in a series‐compensated DFIG‐based wind farm
Authors: Abdeen Mohamed , Ali Mohammed Hamouda , Soliman Ahmed Mohammed Attiya , Eslami Mahdiyeh , Kamel Salah 
Published: June 2023

AbstractThe interaction between the wind farm and the series‐compensated transmission line may lead to the sub‐synchronous oscillation (SSO) phenomenon which affects the system stability and equipment safety. Among the presented methods for damping the SSO phenomenon, the supplementary damping controller (SDC) is the most prevalent method because of its low cost, effectiveness, and simplicity. In all previous studies, one input control signal is fed to the SDC for mitigating the SSO. Here, two input control signals (active power and reactive power deviation) are applied to the SDC for enhancing the system stability and damping the SSO quickly. The ability of the proposed method for damping the SSO has not been investigated before. The proposed SDC is embedded into the q‐axis of the rotor‐side converter (RSC) inner current loop. The modified IEEE first benchmark model (FBM) is used to analyze the performance of the proposed method under different compensation levels, variable wind speeds, and sub‐synchronous control interaction (SSCI). Small‐signal stability using the eigenvalue approach is carried out, where the impact of the proposed method on sub‐synchronous mode, and super‐synchronous mode is investigated. The results successfully prove the superiority of the proposed method for damping the SSO under various operating conditions compared to some previous methods, where the least overshoot and faster convergence have been achieved by the proposed method in all studied cases.
Surface flashover in 50 years: Theoretical models and competing mechanisms
Authors: Li Zhen , Liu Ji , Ohki Yoshimichi , Chen George , Gao He , Li Shengtao 
Published: June 2023

AbstractSurface flashover is a devastating electronic avalanche along the gas–solid interface when a high electric field is applied, which is a potential issue that threatens the safe operations of advanced power electronic, electrical, and spacecraft applications. However, the underlying physical mechanisms for surface flashover development are still under investigation owing to the complex charge transport processes through the gas phase, solid phase, and gas–solid interface. In this study, the history of surface flashover theory in the last 50 years is introduced, and several key questions are reviewed from the perspective of the competing mechanisms of charge transport: the role of each phase in a surface flashover, the origin of surface charging, and effects of traps in solid on surface flashover. Then, some suggestions involve charge transport processes in each phase, and their correlations are put forward, and a predictable ‘charge transport competitive flashover model’ is proposed by clarifying the competing mechanisms of charge transport processes through multiple phases. This study summarises the history and hot topics of physical mechanisms of surface flashover proposed based on classic and recent progress and offers promising routes for developing a more precise surface flashover theory and improving surface flashover performances.
Machine learning‐based LoRa localisation using multiple received signal features
Authors: Islam Khondoker Ziaul , Murray David , Diepeveen Dean , Jones Michael G. K. , Sohel Ferdous 
Published: June 2023

AbstractLow‐power localisation systems are crucial for machine‐to‐machine communication technologies. This article investigates LoRa technology for localisation using multiple features of the received signal, such as Received Signal Strength Indicator (RSSI), Spreading Factors (SF), and Signal to Noise Ratio (SNR). A novel range‐based technique to estimate the distance of a target node from a LoRa gateway using machine‐learning models that incorporates SF, SNR, and RSSI to train the models is proposed. A modified trilateration approach is then used to localise the target node from three gateways. Our experiment used three LoRaWAN gateways and two sensor nodes, on a sports oval with an approximate area coverage of 30,000 square metres. The authors also used a public LoRaWAN dataset to build a model test the proposed method and compare both range‐based distance mapping with trilateration and fingerprint‐based direct location estimation techniques. Our method achieved an average distance error of 43.97 m on our experimental dataset. The results show that the combination of RSSI, SNR, and SF‐based distance mapping provides ∼10% improvement on ranging accuracy and 26.58% higher accuracy for trilateration‐based localisation when compared with just using RSSI. Our method also achieved 50% superior localisation accuracy with fingerprint‐based direct location estimation approaches.
Study on insulation retrofitting based on thermal environment and the CASBEE health checklist evaluation
Authors: Takahashi Toru , Rijal Hom B. , Bogaki Kazuaki 
Published: June 2023

The Carbon Neutral Declaration has been issued in Japan and various initiatives are introducing to realise it, but in the housing sector it is essential to improve the energy efficiency of the stock of over 50 million homes. However, the progress of insulation retrofitting is slow. In particular, there are many challenges in implementing insulation retrofitting in condominiums, including the requirements of residents consent. This study aims to clarify that thermal environment data and the Comprehensive Assessment System for Built Environment Efficiency (CASBEE) health checklist for motivating thermal insulation retrofitting and to support the effectiveness of this approach.
The thermal environment data compares energy consumption and room temperature before and after the retrofit and quantifies the effect of the retrofit. The CASBEE health checklist displays health characteristics and health rankings for each room and health factor by answering 50 questions about the indoor environment in winter. These are considered to visualise the effects of the renovation of respondents' homes and enable them to realise the need for renovation. This method was applied to Ta housing complex in Kanagawa prefecture and X housing complex in Tokyo, where insulation retrofitting had already been carried out, and an attempt was made to verify the effectiveness of the method by comparing the environmental improvements resulting from insulation retrofitting and the differences in residents' responses.
The results of the Ta complex showed that the room temperature was 20°C in the living room and 18°C or higher in the entrance hall, indicating that good environment had been achieved; the CASBEE health checklist also showed an improvement in health characteristics and health ranking in both the Ta and X complexes. The results suggest that the effects of retrofitting in terms of both physical and psychological health are significant. In the future, the results will be presented to the management associations of non-retrofitted dwellings and, in combination with experience sessions in retrofitted dwellings, will be verified as an effective motivational tool.
Weiterbildungsdidaktik in der Alterspsychiatrie und -psychotherapie
– Eine Literaturübersicht
Authors: Pinilla Severin , Lerch Seraina , Nendaz Mathieu , Huwendiek Sören , Klöppel Stefan 
Published: June 2023

Zusammenfassung
Hintergrund Aufgrund des demographischen Wandels, der zunehmend auch die
ältere Bevölkerung einschliessenden Entstigmatisierung
psychischer Erkrankungen und nicht zuletzt dem erheblichen Zuwachs an
spezifischen diagnostischen und therapeutischen Verfahren gewinnt das Fachgebiet
der Alterspsychiatrie und Psychotherapie an Relevanz für die
Grundversorgung. Entsprechend wichtig ist eine qualitativ hochwertige
ärztliche Weiterbildung im Fachgebiet Alterspsychiatrie. Fragestellung
Das Ziel der hier vorgestellten Übersichtsarbeit war es die Literatur zu
medizindidaktischen Aspekten in der alterspsychiatrischen Weiterbildung zu
sichten und aktuellen internationalen Entwicklungen in der kompetenz-basierten
Weiterbildung gegenüberzustellen.
Methode Für diese Übersichtsarbeit wurde die
Scoping-Review-Methode nach Arksey und O’Malley verwendet.
ErgebnisseDie initiale Suche ergab 913 Treffer. Nach Volltextsichtung
wurden 20 Originalartikel für die Datenextraktion verwendet. Die
Studieninhalte wurden drei Kategorien zugeordnet: Nachwuchsrekrutierung, Dauer
und Struktur von Weiterbildungscurricula in der Alterspsychiatrie sowie
alterspsychiatrische Lernziele und Kompetenzen. Mehrheitlich wurden Umfragen
oder Expertenkonsensus als Methoden verwendet. Klinische Arbeitserfahrung mit
alterspsychiatrischen Patient:innen und entsprechende medizindidaktische
Betreuung von Assistenzärzt:innen war ein wichtiger Faktor für
Interesse am Fachgebiet Alterspsychiatrie. Einzelne Evaluationsstudien weisen
auf das Potential von digitalen Lehr- und Lernformaten und Simulationstrainings
für alterspsychiatrische Inhalte. Insgesamt liegen bisher keine Studien
in der Alterspsychiatrie mit explizitem Bezug zu kompetenz-basierten
Weiterbildungskonzepten vor.
Schlussfolgerungen Klinische Rotationen und Mentoring fördern das
Interesse bei Assistenzärzt:innen am Fachgebiet Alterspsychiatrie.
Weiterhin ist eine systematische Verankerung von klinischen Rotationen mit
entsprechender strukturierter Wissens- und Fertigkeitsvermittlung in der
alterspsychiatrischen Weiterbildung ein wichtiger Faktor. Medizindidaktische
Begleitforschung im Fachgebiet Alterspsychiatrie mit Bezug zu
Patientenparametern scheint ein sinnvoller nächster Schritt.
Was wissen Fachkräfte im Gesundheitswesen über Vorsorgedokumente?
Authors: Fleischmann Carolin , Henking Tanja , Schuler Michael , Neuderth Silke 
Published: June 2023

Zusammenfassung

Einleitung Vorsorgedokumente sind bedeutsame Instrumente zur Wahrung der Autonomie bei einwilligungsunfähigen Patientinnen und Patienten und werden von vielen Gesundheitsfachkräften in ihrer beruflichen Praxis als hilfreich angesehen. Ihr Wissen zu den Dokumenten ist jedoch unbekannt. Fehlvorstellungen können Entscheidungen am Lebensende ungünstig beeinflussen. Diese Studie erfasst das Wissen von Gesundheitsfachkräften zu Vorsorgedokumenten sowie relevante Korrelate.
Methoden Im Jahr 2021 erfolgte eine Befragung von Gesundheitsfachkräften verschiedener Berufsgruppen in Würzburg mittels eines standardisierten Fragebogens, u.a. zu Vorerfahrungen mit, Beratung zu und Anwendung von Vorsorgedokumenten, sowie mittels eines objektiven Wissenstests mit 30 Fragen. Neben der deskriptiven Analyse der Wissensfragen wurde der Einfluss verschiedener Parameter auf den Wissensstand geprüft.
Ergebnisse Es nahmen 363 Gesundheitsfachkräfte aus unterschiedlichen Versorgungssettings teil, u.a. Ärzte, Sozialarbeiter, Pflegefachkräfte und Rettungsdienstpersonal. 77,5% arbeiteten in der Patientenversorgung, wovon 39,8% täglich bis mehrfach pro Monat Entscheidungen auf Basis einer Patientenverfügung trafen. Hohe Quoten inkorrekter Antworten im Wissenstest belegen Wissenslücken zu Entscheidungen bei einwilligungsunfähigen Patienten; im Mittel wurden 18 von 30 Punkten erreicht. Signifikant bessere Ergebnisse im Wissenstest hatten Ärzte, männliche Gesundheitsfachkräfte und Befragte mit mehr persönlicher Erfahrung mit Vorsorgedokumenten.
Diskussion Die Gesundheitsfachkräfte weisen ethisch und berufspraktisch relevante Wissensdefizite sowie einen hohen Fortbildungsbedarf zu Vorsorgedokumenten auf. Vorsorgedokumente nehmen bei der Wahrung der Patientenautonomie eine wichtige Rolle ein und sollten in der Aus- und Fortbildung unter Beteiligung nicht ärztlicher Berufsgruppen mehr Beachtung finden.
Update Mammakarzinom 2022 Teil 6 – Brustkrebs in fortgeschrittenen Krankheitsstadien
Authors: Lüftner Diana , Lux Michael P. , Fehm Tanja N. , Welslau Manfred , Müller Volkmar , Schütz Florian , Fasching Peter A. , Janni Wolfgang , Thomssen Christoph , Witzel Isabell , Beierlein Milena , Belleville Erik , Untch Michael , Thill Marc , Ditsch Nina , Aktas Bahriye , Banys-Paluchowski Maggie , Kolberg-Liedtke Cornelia , Wöckel Achim , Kolberg Hans-Christian , Harbeck Nadia , Stickeler Elmar , Tesch Hans , Hartkopf Andreas D. 
Published: June 2023

ZusammenfassungDie in den letzten Jahren begonnenen großen Studienprogramme zu den CDK4/6-Inhibitoren, den zielgerichteten Therapien und den Antikörper-Medikament-Konjugaten resultieren in Ergebnissen, die von aktuellen Studien auf internationalen Kongressen und Fachzeitschriften veröffentlicht werden. In diesem Zusammenhang sind neue Ergebnisse der großen CDK4/6-Inhibitor-Studien verfügbar. Auch werden zunehmend Daten von großen genomischen Studien zu Effektivitäts- und Resistenzmechanismen für Patientinnen, die mit CDK4/6-Inhibitoren behandelt worden sind, veröffentlicht. Basierend auf diesen Ergebnissen sollten nicht zuletzt Studien in Bezug auf Kombinationspartner und Therapiesequenzen geplant werden. Mit Sacituzumab Govitecan ist aufgrund neuester Veröffentlichungen nun ein zweites Antikörper-Medikament-Konjugat vorhanden, das bei hormonrezeptorpositiven (HRpos)/HER2-negativen (HER2neg) Patientinnen einen Gesamtüberlebensvorteil mit sich bringt. Diese Übersichtsarbeit fasst die neuesten Entwicklungen zusammen und ordnet sie in den aktuellen Forschungsstand ein.
Qualitätsvariation in der Schweiz: Analyse der Mamma-Resektionen bei Brustkrebs anhand des Qualitätsindikators der Brusterhaltung
Authors: Moser Dominik , von Ahlen Christine , Geissler Alexander 
Published: June 2023

Zusammenfassung
Ziel der Studie Die Studie geht der Frage nach, ob in der Schweiz regionale Unterschiede bei den Behandlungsergebnissen von elektiven Mamma-Resektionen bei Brustkrebs bestehen und falls ja, ob eine mögliche Ursache in der Krankenhausplanung seitens der Kantone zu Grunde liegen könnte.
Methodik Anhand der Inpatient Quality Indicators (CH-IQI) wird die Ergebnisqualität auf Ebene der Schweizer Kantone analysiert und mit den kantonalen Anforderungen, um diese Behandlung durchführen zu können, verglichen.
Ergebnisse Kantonale Unterschiede wurden sowohl bei der Ergebnisqualität anhand des Qualitätsindikators der Brusterhaltung als auch bei dem Detaillierungsgrad der Anforderungen an die Struktur- und Prozessqualität deutlich.
Schlussfolgerung Die Behandlungsqualität ist in der Schweiz kaum transparent vergleichbar; eine Interpretation der verfügbaren Qualitätsinformationen ist anspruchsvoll und für Patienten kaum möglich. Um die aufgezeigten Qualitätsunterschiede zu reduzieren, sollte die Krankenhausplanung interkantonal erfolgen, wie dies in der hochspezialisierten Medizin umgesetzt wird.
Does Functional Imaging Play a Role in Pre-Operative Diagnosis of
Brain Tumours?
Authors: Oancea Alexandra A. , Saleh Christian , Cordier Dominik , Schoepfer Raphaela , Lieb Johanna 
Published: June 2023

AbstractAlthough there is a large variability in the neural organization of language
function between individuals, there is an ongoing debate about functional
imaging as a standard procedure in the preoperative setting of brain tumors.
Brain mapping of the language centers differs from individual to individual in
multilingual patients and changes in its architecture may occur as a result of
neuroplasticity induced by a mass lesion. This article discusses the role of
functional imaging in the preoperative setting.
Endoscopic screening of the upper gastrointestinal tract for second primary tumors in patients with head and neck cancer in a Western country
Authors: van Tilburg Laurelle , van de Ven Steffi E. M. , de Jonge Pieter Jan F. , de Graaf Wilmar , Spaander Manon C. W. , Nikkessen Suzan , Hardillo Jose A. , Sewnaik Aniel , Monserez Dominiek A. , Mast Hetty , Keereweer Stijn , Bruno Marco J. , Baatenburg de Jong Robert J. , Koch Arjun D. 
Published: June 2023

Background Patients with head and neck squamous cell carcinoma (HNSCC) can develop second primary tumors (SPTs) in the esophagus. Endoscopic screening could lead to detection of SPTs at early stages and improve survival.
Methods We performed a prospective endoscopic screening study in patients with curably treated HNSCC diagnosed between January 2017–July 2021 in a Western country. Screening was performed synchronously (< 6 months) or metachronously (≥ 6 months) after HNSCC diagnosis. Routine imaging for HNSCC consisted of flexible transnasal endoscopy with positron emission tomography/computed tomography or magnetic resonance imaging, depending on primary HNSCC location. The primary outcome was prevalence of SPTs, defined as presence of esophageal high grade dysplasia or squamous cell carcinoma.
Results 202 patients (mean age 65 years, 80.7 % male) underwent 250 screening endoscopies. HNSCC was located in the oropharynx (31.9 %), hypopharynx (26.9 %), larynx (22.2 %), and oral cavity (18.5 %). Endoscopic screening was performed within 6 months (34.0 %), 6 months to 1 year (8.0 %), 1–2 years (33.6 %), and 2–5 years (24.4 %) after HNSCC diagnosis. We detected 11 SPTs in 10 patients (5.0 %, 95 %CI 2.4 %–8.9 %) during synchronous (6/85) and metachronous (5/165) screening. Most patients had early stage SPTs (90 %) and were treated with curative intent with endoscopic resection (80 %). No SPTs in screened patients were detected with routine imaging for HNSCC before endoscopic screening.
Conclusion In 5 % of patients with HNSCC, an SPT was detected with endoscopic screening. Endoscopic screening should be considered in selected HNSCC patients to detect early stage SPTs, based on highest SPT risk and life expectancy according to HNSCC and comorbidities.
Opioid-Sparing Pain Control after Rhinoplasty: Updated Review of the Literature
Authors: Liu Rui Han , Xu Lucy J. , Lee Linda N. 
Published: June 2023

AbstractRhinoplasty is one of the most performed elective surgeries, and given the opioid crisis, increasing research and studies are focused on successful pain control with multimodality opioid-sparing techniques, such as acetaminophen, nonsteroidal anti-inflammatory drugs (NSAIDs), and gabapentin. Although limiting overuse of opioids is critical, this cannot be at the expense of inadequate pain control, particularly as insufficient pain control can be correlated with patient dissatisfaction and the postoperative experience in elective surgery. There is likely significant opioid overprescription, as patients often report taking less than 50% of their prescribed opioids. Furthermore, excess opioids provide opportunities for misuse and opioid diversion if not disposed of properly. To optimize postoperative pain control and minimize opioid requirements, interventions must occur at the preoperative, intraoperative, and postoperative time points. Preoperative counseling is imperative to set expectations for pain and to screen for predisposing factors for opioid misuse. Intraoperatively, use of local nerve blocks and long-acting analgesia in conjunction with modified surgical techniques can lead to prolonged pain control. Postoperatively, pain should be managed with a multimodal approach, incorporating acetaminophen, NSAIDs, and potentially gabapentin with opioids reserved for rescue analgesia. Rhinoplasty represents a category of short-stay, low/medium pain, and elective procedures highly susceptible to overprescription and consequently, are readily amenable to opioid minimization through standardized perioperative interventions. Recent literature on regimens and interventions to help limit opioids after rhinoplasty are reviewed and discussed here.
Titanium-Catalyzed Intermolecular Hydroaminoalkylation of Terminal Alkynes
Authors: Thye Hermann , Fornfeist Felix , Doye Sven , Geik Dennis , Schlüschen Levi L. , Schmidtmann Marc 
Published: June 2023

AbstractTerminal alkynes undergo intermolecular hydroaminoalkylation reactions with secondary amines in the presence of titanium catalysts and depending on the catalyst and the structure of the substrates, allylic amines and/or imines are formed as products in moderate yields. In addition, the desired allylamines can also be obtained from a convenient reaction sequence consisting of an initial hydroaminoalkylation of trimethylsilyl-protected alkynes and a subsequent protodesilylation that selectively delivers γ-unsubstituted allylamines.
Effective Risk Assessment for Distal Radius Fractures: A Rigorous Multivariable Regression Analysis, Using a Novel 8-Item Modified Frailty Index
Authors: Momtaz David , Ghali Abdullah , Ahmad Farhan , Gonuguntla Rishi , Kotzur Travis , Wang Rebecca J. , Ghilzai Umar , Abbas Adam , Wu Chia 
Published: June 2023

Abstract
Introduction Distal radius fractures (DRFs) are among the most common orthopaedic injuries. The prevalence of DRFs is increasing across all age groups but remains the second most common fracture in the elderly. The modified frailty index (MFI) often predicts morbidity and mortality in orthopaedic injuries. This study aims to determine the predictive value of MFI on complication rates following DRF and the patient length of stay and discharge outcomes.
Methods We utilized our MFI to perform a retrospective analysis of the American College of Surgeons National Surgical Quality Improvement Program database.
Results In a total of 22,313 patients, the average age was 46 ± 16. An increase in MFI led to an increase in the odds ratio of readmission and reoperation (p < 0.001). MFI predicted complications, doubling the rate as the score increased from 1 to 2 (p < 0.001). An MFI of 2 also led to a delayed hospital stay of 5 days (p < 0.001), as well as an increase in the odds of patients not being sent home at discharge (p < 0.001). Finally, life-threatening complications were also predicted with an increased MFI, the odds of a life-threatening complication increasing 488.20 times at an MFI of 3 (p < 0.001).
Discussion and Conclusion While surgical decision-making for frail patients with DRFs remains contentious, this novel 8-item MFI score was significantly associated with the probability of hospital readmission/reoperation, postoperative complications, and delayed hospital length of stay. Three new parameters were incorporated into our 8-item score compared with the conventional 5; hypoalbuminemia status (< 3.5 mg/dL), previous diagnosis of osteoporosis, and severe obesity (body mass index > 35) enhancing its sensitivity. Future studies are warranted for its prospective utility in ruling out postsurgical comorbidity.
Transapical Transcatheter Mitral Valve Implantation with the Tendyne Valve: The Swiss Experience
Authors: Nucera Maria , Miazza Jules , Praz Fabien , Kaiser Christoph , Siepe Matthias , Reineke David , Reuthebuch Oliver 
Published: June 2023

Abstract
Background The aim of this study was to report outcomes of all patients undergoing transcatheter mitral valve implantation with the Tendyne Mitral Valve System (Tendyne) in Switzerland.
Methods We retrospectively analyzed preoperative echocardiographic and computed tomography (CT) data, procedural findings, and 30-day and 1-year follow-up echocardiographic and clinical data of patients who underwent transcatheter mitral valve implantation with Tendyne in Switzerland.
Results A total of 24 patients (age, 74.8 ± 7.8 years; 67% male) underwent transapical transcatheter mitral valve implantation with Tendyne between June 2020 and October 2022. Technical success rate was 96%. In five patients, concomitant interventions in the form of transcatheter aortic valve implantation (one patient), minimally invasive direct coronary artery bypass (one patient), and transcatheter edge-to-edge repair (three patients) were performed prior to or after the index procedure. There was one device embolization, and two patients required valve retrieval. In-hospital outcomes included one stroke and three major bleeding events. None of the patients died within 30 days. Two patients were rehospitalized for decompensated heart failure. At 1-year follow-up, there were three noncardiovascular-related deaths.
Conclusion Transcatheter mitral valve implantation with Tendyne is feasible to treat polymorbid patients suffering from complex mitral valve disease as well as patients with previous mitral interventions. Perioperative risk was acceptable and procedural success high.