bluuebunny/crossref_metadata_2025_split huggingface dataset:
Measurement configuration for integrated electric–gas systems via observability analysis considering gas flow dynamics
Authors: Chen Zeming , Li Zhigang , Li Huajian , Zhang Jiahui , Li Yixuan , Zheng Jiehui 
Published: November 2024

AbstractState estimation plays an important role in the monitoring and control of integrated electric–gas systems (IEGSs), but it faces limitations due to insufficient measurement configurations and low data redundancy in these systems; additional measurement configurations are needed to increase the overall system observability. Owing to the lack of suitable observability analysis methods, optimal measurement configurations for IEGSs remain underexplored. This paper presents an IEGS observability analysis method that incorporates gas flow dynamics via the Lie derivative. This method incorporates the complex topological structure of the gas network and the dynamic process of gas flow into the IEGS observability analysis. Furthermore, the measurement configuration problem for IEGSs considering gas flow dynamics is formulated as a rank‐constrained optimization problem. To handle the rank constraints effectively, an iterative cutting method is developed with convergence guarantees. Finally, the efficacy and practicality of the proposed methods are validated through case studies of varying scales. The proposed optimal measurement configuration model reduces measurement configuration costs while maintaining system observability.
Vaskulitis der Haut nach Kokainkonsum
Authors: Hellwege Rubi Stephani , Sitter Thomas , Wörnle Markus 
Published: November 2024

Zusammenfassung
Anamnese und klinischer Befund Ein 20-jähriger Patient stellte sich mit großflächigen und äußerst schmerzhaften Purpura mit Nekrosearealen und Vesikeln, v.a. an den unteren Extremitäten, aber auch an den Armen, am Stamm und an den Ohren in unserer Notaufnahme vor. Vorbestehend war ein Konsum von Kokain.
Untersuchungen In den Laboruntersuchungen zeigten sich erhöhte Entzündungszeichen sowie eine Erhöhung der Proteinase 3- und Myeloperoxidase-ANCA (Anti-Neutrophile cytoplasmatische Antikörper).
Diagnose In Zusammenschau der Anamnese, des klinischen Befundes und der Laborwerte zeigte sich eine Vaskulitis der Haut nach Kokainkonsum.
Therapie und Verlauf Unter einer Therapie mit Steroid sowie Drogenkarenz kam es zu einer Rückbildung der Veränderungen.
Folgerung Die Vaskulitis ist eine schwerwiegende Komplikation der Einnahme von Kokain.
Reisemedizinische Klassiker: Delegation von Leistungen und Impfung Minderjähriger
Authors: Schelling Jörg , Makoski Kyrill 
Published: November 2024

ZUSAMMENFASSUNG
In der Reisemedizin stellen sich häufig Fragen der Delegation ärztlicher Leistungen an nicht ärztliches Personal, gerade bei Impfungen. Diese sind auch oft Streitpunkt zwischen getrennt lebenden Eltern minderjähriger Kinder. Der Beitrag gibt anhand von Fallbeispielen einen Überblick über die Zulässigkeit der Delegation von Leistungen an nicht ärztliches Personal und zeigt Fallstricke bei der Impfung Minderjähriger auf, deren Eltern getrennt leben.
Die Klinik für Dermatologie des Christlichen Klinikums Unna stellt sich vor
Authors: Boms Stefanie , Gambichler Thilo 
Published: November 2024

ZusammenfassungDie Geschichte der Dermatologie am Christlichen Klinikum Unna reicht bis 1945 zurück, als eine Belegabteilung für Dermatologie im Katharinen-Hospital Unna eröffnet wurde. Diese entwickelte sich über die Jahre weiter, und 1990 wurde sie in eine hauptamtliche Abteilung mit 30 Betten umgewandelt. Seit Oktober 2017 wird die Klinik von Dr. Stefanie Boms geführt, die zuvor als Oberärztin in der Klinik tätig war. Die Klinik fusionierte 2020 mit dem evangelischen Krankenhaus Unna und ist nun Teil des Christlichen Klinikums Unna. Mit 32 Betten und einer Ambulanz betreut die dermatologische Abteilung stationäre und ambulante Patienten in einem großen Einzugsgebiet, das bis ins Sauerland reicht. Unterstützt wird die Klinik von Oberärzt*innen, darunter Prof. Dr. Thilo Gambichler, der seit 2021 in Teilzeit in der Klinik tätig ist und das Hauttumorzentrum Unna leitet, welches im März 2024 erstzertifiziert wurde. Die Klinik für Dermatologie hat sich in den letzten Jahren weiterentwickelt, insbesondere durch den demografischen Wandel und gesetzliche Vorgaben. Das operative Spektrum hat sich von Varizen- und Ulkusoperationen hin zur onkologischen Versorgung verlagert, was auch mit einer höheren Anzahl älterer Patient*innen verbunden gewesen ist. Die stationären DRG-Fälle stiegen von 1068 im Jahr 2007 auf 1740 im Jahr 2023, wobei der Altersmedian der Patienten von 62 auf 72 Jahre anstieg. Die ambulante Dermatologie wird über Ermächtigungsambulanzen und Kooperationen mit anderen Abteilungen angeboten. Besonders in der Hautkrebsversorgung ist die Klinik hochaktiv und arbeitet eng mit der onkologischen Tagesklinik sowie anderen Abteilungen und Kooperationspartnern zusammen. In Bezug auf Aus- und Weiterbildung bietet die Klinik umfassende Möglichkeiten für junge Ärzt*innen, einschließlich eines Rotationssystems und regelmäßiger Fortbildungen. Zudem ist die Klinik ein Lehrkrankenhaus der Universität Münster und engagiert sich in Forschung und Lehre unter der Leitung von Prof. Gambichler.
Fetal Heart Rate and Amniotic Fluid Volume Measurements with a Home Ultrasound Device
Authors: Pardo Anat , Nahum Fridland Shir , Rak Or Lee , Klochendler Frishman Emilie , Zafrir Danieli Hadar , Shmueli Anat , Barbash-Hazan Shiri , Wiznitzer Arnon , Walfisch Asnat , Sela Tomer , Wolff Leor , Hadar Eran 
Published: November 2024

Objective Pulsenmore ES is a self-scanning ultrasound (US) system for remote fetal assessment. It comprises a handheld transducer that serves as a smartphone cradle coupled with an application and clinician's web-viewer dashboard. Recently, a novel capability was added to the system allowing offline fetal heart rate (FHR) and maximal vertical pocket (MVP) measurements. The aim of this study was to evaluate these tools for usability and accuracy.
Study Design A prospective, non-randomized, non-blinded clinical study design was used. Pulsenmore ES scans were obtained by non-professional laypersons in app-guided (AG) mode (user follows video tutorials in the application) or clinician-guided (CG) mode (user is guided by a health care professional in a real-time telemedicine visit). The scans were stored on a cloud for later interpretation by a health care professional. Each self-scan was immediately followed by a standard US scan performed by a clinician. The asynchronous FHR and MVP measurements made on the AG and CG scans through the designated dashboard were analyzed and compared with the real-time, in-clinic (INC) measurements.
Results The cohort included 28 women. Rates of successful utilization of the Pulsenmore tool for measurement of FHR were 84.7 ± 11.24% of scans made in AG mode and 96.3 ± 6.35% of scans made in CG mode. Corresponding values for MVP were 91.7 ± 2.31% and 95.0 ± 1.73%. FHR accuracy (difference from INC values) was 10.8 ± 7.5 beats per minute (bpm; 7.2%) in AG mode and 5.8 ± 5.1 bpm (4%) in CG mode. MVP accuracy was 1.3 ± 1.4 cm (22%) and 0.9 ± 0.8 cm (14%), respectively. Sensitivity (87.5% and 100% in AG and CG modes, respectively) and specificity (95% and 95.5% in AG and CG modes, respectively) were established for MVP.
Conclusion FHR and MVP measurements obtained from scans captured by the self-operated Pulsenmore ES ultrasound platform are highly accurate and reliable for clinical use relative to standard INC measurements.
Key Points
Bone Mineral Density Distribution in the Posterior Wall of the Lateral Mass Evaluated by Computed Tomography Osteoabsorptiometry
Authors: Doi Kazuma , Inoue Nozomu , Tani Satoshi , Mizuno Junichi 
Published: November 2024

Abstract
Objective Cervical open-door laminoplasty using plates and miniscrews is gaining popularity. One of the complications of this procedure is the loosening or back-out of the miniscrews inserted in the lateral mass (LM). Bone mineral density (BMD) measured by computed tomography (CT) has been used as a predictor of bone strength. However, bone density distribution in the LM remains unclear.
Materials and Methods We investigated bone density distribution in the posterior wall of the LM. A total of 120 LMs were analyzed from the patients who underwent laminoplasty. The distribution of BMD defined by Hounsfield unit (HU) in the posterior wall of the LM was measured by CT osteoabsorptiometry. The posterior wall was divided into nine zones, which consisted of three columns (lateral, center, and medial) and three rows (cranial, center, and caudal). BMD in each zone was averaged and compared by zones and cervical levels.
Results Overall mean ± standard deviation BMD was 1,092 ± 433 HU. Averaged BMD in the entire posterior wall was highest at C4 (1,365 ± 459 HU), second highest at C3 (1,239 ± 435 HU), and lower in the lower levels. BMD in the medial–center zone (1,357 ± 443 HU) was the highest in all zones. BMD in the medial–caudal region at C7 was only 59% of the highest BMD in the medial–center region at C4.
Conclusion The medial–center to the cranial region was most suitable for miniscrew fixation for laminoplasty. These biomechanical findings would be useful in the preoperative planning of laminoplasty especially for the determination of the LM screw entry points and in the design of laminoplasty implants.
Palmar Plate Fixation in Scaphoid Nonunions—Surgical Technique and Review of the Literature
Authors: Quadlbauer Stefan , Pezzei Chistoph , Hintringer Wolfgang , Beer Thomas , Hausner Thomas , Leixnering Martin , Jurkowitsch Josef 
Published: November 2024

AbstractEven today, the treatment of scaphoid nonunions remains challenging for the treating hand surgeon. Considering the biomechanical principles of wrist kinematics, especially the three-dimensional movement of the scaphoid, it is evident that a single headless compression screw does not provide sufficient stability to counteract all these forces, particularly rotational forces. Palmar plate fixation was initially introduced as a salvage procedure after failed screw fixation. It ensures very high rotational stability but also supports correction of the humpback deformity, reconstruction of scaphoid length, and prevents bone graft extrusion. However, indications have since been extended to include primary nonunion treatment in cases with humpback deformity or comminuted fractures. Even in recalcitrant cases (substantial bone loss, prior surgery failure, avascular necrosis, or durations exceeding 2 years), high union rates and favorable functional outcomes have been reported. This article attempts to summarize the biomechanical principles, indications, surgical techniques, and results following palmar angular stable plate fixation in scaphoid nonunions.
Role of 18FDG PET/CT in Detecting Primary Tumors in Patients with Carcinoma of Unknown Primary: Single-Center Cross-Sectional Study from 2017 to 2023 (Extension Study)
Authors: Fatima Nosheen , Laiq Mina , Rafay Muhammad , Azam Sara Muhammad , Zaman Maseeh uz 
Published: November 2024

Abstract
Background Carcinoma of unknown primary (CUP) is a diverse group of cancers in which the primary tumor site remains occult despite detailed investigations. This is an extension of a published parent study with a smaller cohort, to further validate the published facts of detection efficiency of 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18FDG PET/CT) in patients with CUP over a larger sample from 2017 to 2023.
Methods Patients with CUP referred for 18FDG PET/CT scan for detection of primary sites during the study period were recruited. 18FDG PET/CT scan was acquired using a standardized protocol, and patients with suspected primary sites underwent biopsies. Scan findings and biopsy results were analyzed to find the detection rate, sensitivity, area under the curve (AUC), and positive predictive value (PPV). As no biopsy was performed in cases with negative scan, these cases were considered false negatives (FNs).
Results Total 230 patients with CUP were included with similar demographic trend (mean age: 58 ± 14 years; 63% male and 37% female; mean body mass index: 26.82 ± 5.4 kg/m2); 138/230 (60 vs. 74% in parent study) patients were found to have a hypermetabolic focus suggestive of primary tumor sites and subjected to biopsy which turned out positive in 127/138 (true positive [TP]: 92 vs. 76% in parent study) and negative in 11/138 (true negative [TN]: 8 vs. 24% in parent study). Sensitivity and PPV of 18FDG PET/CT were 58 and 92%, respectively (68 and 76%, respectively, in parent study). The remaining 92/230 (40%) patients with negative 18FDG PET/CT for primary focus did not have biopsy. No significant demographic difference was seen in patients with TP and FN studies (p > 0.05). Receiver operating characteristics (ROC) curve revealed fair diagnostic strength of 18FDG PET/CT for detecting unknown primary (AUC 0.710; p ≤ 0.05; standard error = 0.0167; confidence interval: 0.647–0.768; vs. nonsignificant in parent study).
Conclusion We conclude that this extension study with a larger cohort compared with the parent study has found a similar detection efficiency of 18FDG PET/CT for identifying primary tumor in patients with CUP (58 vs. 57%) but with better PPV and sensitivity. Upfront use of 18FDG PET/CT in CUP could preclude the use of many futile diagnostic procedures. Furthermore, the use of tumor-specific PET tracers, higher resolution scanners, and acquiring delayed images in patients with negative 18FDG study could reduce FN results in patients with CUP.
Absorption of α-oxygen at 1.3°K. III. 1Σu−←3Σg− transition
Authors: Prikhot'ko A. F. , Glushkov L P. , Pavloshchuk V. A. , Shanskii L.I. 
Published: November 2024

The singlet band system in the middle ultraviolet region of the absorption spectrum of solid oxygen, having various isotopic compositions, is investigated. It is shown that these bands are associated with molecular excitation in the 1Σu--state. The possible exciton-magnon nature of the bands of this series is discussed. The potential curves of the 1Σu--state in the crystal and in the gas are calculated.
Investigation of electronic, optoelectronic, and mechanical properties of lead-free cubic perovskite compound using density functional theory
Authors: Nisha Nusrat Jahan , Hossain Parosh Md. Bayjid , Ovi Istiak Ahmed , Islam Md. Jahirul 
Published: November 2024

This study depicts the physical characteristics, including electronic, structural, mechanical, magnetic, and optical properties, of the lead-free, inorganic, non-toxic cubic perovskite compound FrCdX3 (where X = Br, Cl, and F). The main goal is to evolve a lead-free, inorganic, non-toxic perovskite alternative along with suitable opto-electrical characteristics using density functional theory under generalized gradient approximation and the Perdew–Burke–Ernzerhof functional within the Cambridge Serial Total Energy Package program. The structural output describes compounds with smaller lattices and smaller cell volumes, which denotes stronger bonds between atoms. Electronic outcomes visualize that FrCdF3, FrCdCl3, and FrCdBr3 have a bandgap value of 3.109, 1.675, and 0.628 eV, respectively, which indicates an inverse relation between crystal structure size and bandgap. As a result, conductivity is increasing with increasing crystal size. This bandgap depicts them as good alternatives in solar cells, semiconductors, photodetectors, and light-emitting diodes. The optical findings describe their use in sensors, energy efficiency coating, and conductive films. The mechanical output demonstrates mechanical stability as all the compounds of FrCdX3 satisfy the Born stability law. Mechanical results illustrate that all the materials are ductile because Poisson’s ratio quantities are within the 0.26 to 0.32 range, and Pugh’s ratio quantities are above 1.75. In essence, increasing the structure size decreases the stiffness but increases the ductility. In the end, all the compounds of FrCdX3 show a diamagnetic nature as upward and downward spin fully superimposed on each other, which makes them a good fit for MRI machines, superconductors, and magnetic sensors.
Design and characterization of a multi-ring nested CMUT array for hydrophone
Authors: Jia Licheng , Xue Rihui , Meng Fansheng 
Published: November 2024

Abstract
This paper presents the design, fabrication, packaging, and characterization of a high-performance CMUT array. The array, which features rectangular cells fabricated using a sacrificial release process, achieves a receiving sensitivity of −231.44 dB (re: 1 V/μPa) with a 40 dB gain. Notably, the CMUT array exhibits a minimal sensitivity variation of just 0.87 dB across a temperature range of 0 to 60 °C. Furthermore, the output voltage non-linearity at 1 kHz is approximately 0.44%. These test results demonstrate that the reception performance of the 67-element CMUT array is superior to that of commercial transducers. The high performance and compact design of this CMUT array underscore its significant commercial potential for hydrophone applications.
Charge transport properties and variable photo-switching of three-terminal Cs2AgBiBr6 device
Authors: Biswas Iman , Dey Arka , Nunzi Jean Michel , Halder Nilanjan , Mondal Aniruddha 
Published: November 2024

Abstract
In this study, we present an in-depth exploration of charge transport phenomena and variable photo-switching characteristics in a novel double-perovskite-based three-terminal device. The Cs2AgBiBr6 thin film (TF) was synthesized through a three-step thermal evaporation process followed by precise open-air annealing, ensuring superior film quality as confirmed by structural and morphological characterizations. Photoluminescence spectroscopy revealed distinct emissions at 2.28 and 2.07 eV, indicative of both direct and indirect electronic transitions. Our device exhibited space-charge limited current (SCLC) behaviour beyond 0.35 V, aligning with the relationship

, where the exponent m transitioned from ≤1 to >1. Detailed analysis of Schottky parameters within the trap-filled limit (TFL) regime was conducted, accounting for variations in temperature and optical power. Significantly, the self-powered photodetector demonstrated outstanding performance under illumination. The sensitivity of the device was finely tunable via the applied bias voltages at the third terminal. Notably, an optimal bias voltage of ±100 μV yielded maximum responsivity (R) of 0.48 A/W and an impressive detectivity (D*) of 1.07 × 109 Jones, highlighting the potential of this double-perovskite-based device for advanced optoelectronic applications.
The influence of the dielectric material on the planar antennas’ parameters
Authors: Dușa Sabin , Constantinescu Claudia , Giurgiuman Adina , Andreica Sergiu , Gliga Razvan , Pacurar Claudia 
Published: November 2024

Abstract
Patch antennas made in planar electromagnetic technology have found applicability in the last few years in a varied range of fields, but predominantly in wireless communications and telecommunications. This type of antenna is popular due to their reduced dimensions, their ease of manufacture and adaptability to integration into various devices. In this paper the design of a compact antenna operating under 6 GHz, for use in 5G applications, is proposed. For this purpose, a planar monopole antenna with two arms, fed by a coplanar microstrip line, printed on different types of dielectric substrates was numerically modelled and constructed and the influence of the dielectric material on the antenna parameters was analysed in order to further design some array and MIMO (multiple input – multiple output) antennas. The parameters considered to be studied to reach some optimum structures operating at high performances were the S parameters, directivity and gain. For this purpose, four sets of planar monopole antennas were designed and modelled using a commercial software used for high frequency analysis. The results of the numerical analysis were validated also through experimental measurements.
Convergence of science and technology for wellbeing: A case study on AAL systems for older adults
Authors: Roca-González Joaquín , Ortiz-Zaragoza Francisco J. , Vera-Repullo José A. , Méndez-Mateo Inmaculada 
Published: November 2024

Abstract
This paper explores the convergence of science and technology through the lens of Ambient Assisted Living (AAL) systems, demonstrating how collaborative development across multiple disciplines enhances the wellbeing and independence of older adults. We illustrate the integration of medical sciences, robotics, artificial intelligence (AI), sensor technology, and human-computer interaction (HCI) in creating sophisticated AAL systems that address both the medical and social needs of older adults. This case study focuses on the principles of convergence that guide the development of modern healthcare solutions, such as as holistic views, common goals, evolutionary patterns, and cross-domain interactions that foster the creation of innovative, effective, and ethically sound solutions. By examining collaborative processes, scientific innovations, and technological advancements, the study highlights the multifaceted impacts of AAL systems on elderly wellbeing, emphasizing the critical role of interdisciplinary approaches in solving complex health and social challenges.
Analysis in Hospital Operating Rooms: Understanding Perturbations from Electrocautery
Authors: Matei Moruz , Doru Andritoi , Radu Ciorap 
Published: November 2024

Abstract
Under normal operation, electronic systems and equipment emit electromagnetic fields (EMFs) at predefined levels. These fields can pose safety risks by inducing currents in conductive components and causing polarization effects on insulators, potentially affecting biological tissue at both cellular and molecular levels. In this study, we used the Narda SRM-3006 magnetic field surveillance equipment to analyse the spatial distribution of magnetic fields in operating rooms and address electromagnetic interference (EMI) concerns. We detailed specific methods for measuring and analysing magnetic fields in hospital operating blocks, including a technique for representing spatial distribution with minimal measurements. Additionally, we aimed to conduct a survey to assess hospital staff’s awareness of EMI-related safety hazards. The results of the measurements will assist us in developing best practice guidelines for the use and positioning of equipment and personnel in the operating room to prevent potential accidents.
mHealth application for cognitive rehabilitation
Authors: Ciorap R , Andrițoi D , Bojoga M , Munteanu D , Ungureanu M I 
Published: November 2024

Abstract
The present work aims to develop a “serious game” application for cognitive rehabilitation after a stroke. This app (smartphone/tablet/PC) aims to provide an easily accessible and inexpensive digital tool for patients with various cognitive impairments. Using the app, patients can perform exercises structured on several difficulty levels, targeting different aspects of cognition such as memory, attention, perception of details, and language skills. These exercises are carefully designed to improve impaired cognitive functions and stimulate recovery.