bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the design method of mode transition control law for Ma6 external parallel TBCC engine
Authors: Jiao Guiqian , Song Wenyan , Zeng Xianglong , Fu Yu , Li Jianping 
Published: February 2024

Abstract
To achieve a fast and reliable mode transition of the Ma 0–6 external parallel TBCC engine, a design method for the transition state control law is developed. The design parameters of the TBCC engine are obtained based on the mission requirements of hypersonic aircraft. For the key mode transition process of the combination engine, a segmented mode transition strategy is formulated with the objectives of smooth thrust and continuous flow. The mode transition control law of the combination engine is designed and optimized using the Hooke-Jeeve Direct Search Method. The results demonstrate that the proposed design method for the mode transition control law can effectively enable a fast and smooth mode transition of the combination engine, with a total duration of 7 s. During the mode transition process, the total thrust fluctuation during the transition from the turbofan windmill state to the turbofan shutdown state is the largest, and the maximum relative error between the total thrust and the expected value during the mode transition process is 0.4 %.
Jenseits der Lagerbildung. Ein Kommentar zu „Gütekriterien in der Soziologie“
Authors: Erhard Franz , Schäfer Robert 
Published: February 2024

Zusammenfassung
Der Beitrag setzt sich mit dem Gütekriterien-Katalog auseinander, wie er von Otte et al. (2023) entwickelt wurde. Dieser hat uns einerseits zu Selbstkritik angeregt, andererseits möchten wir einige kritische Anmerkungen zur Weiterführung der Debatte beitragen. Diese beziehen sich darauf, dass einige Gütekriterien gleichzeitig zu weit und zu eng formuliert sind, was in beiden Fällen durch die unnötige Fixierung auf kausalistische Forschungsstrategien begründet ist. Zudem wird ein Gütekriterium vorgeschlagen, das bis dato sowohl von der qualitativen als auch von der quantitativen Seite zu wenig behandelt wurde: die gesellschaftstheoretische Rückbindung der empirischen Ergebnisse. Abschließend plädieren wir dafür, in künftigen Gütekriterien-Katalogen systematisch den Unterschied zweier verschiedener Verständnisse davon zu berücksichtigen, was Generalisierung bedeuten kann. Im Zuge dessen plädieren wir für die Anerkennung eines epistemologischen Pluralismus in der Soziologie.
Hydrothermal synthesis of zinc molybdates (α-ZnMoO4) nanoparticles and its applications of supercapacitor and photocatalytic performances
Authors: Elayarani Palanisamy , Sumathi Thiyagarajan , Sivakumar Ganesan , Pragadeswaran Selvam , Suthakaran Selvakumar , Sathiyamurthy Subbarayan , Seshadhri Jayasree , Ayyar Manikandan , Arularasu Markasagayam Visagamani 
Published: February 2024

Abstract
The rational construction and design of nanostructured materials have a significant impact on the fabrication of high-performance electrode materials, which have attracted considerable interest in an effort to enhance the reliability and efficiency of energy storage devices. In this study, the α-ZnMoO4 nanoparticles were successfully prepared by facile hydrothermal method and the influence of various hydrothermal reaction times on structural, morphological, optical and electrochemical properties were studied. XRD analysis illustrated that α-ZnMoO4 nanoparticles exhibited anorthic crystal structure and the average crystallite size was 42 nm. FESEM images changed from a cubic structure to plate-like structures depending on reaction times. HRTEM analysis revealed that prepared sample showed a plate-like structure and the SAED pattern exhibited a polycrystalline nature. The FTIR spectrum confirmed the presence of vibrational molecules in α-ZnMoO4 nanoparticles. The BET and XPS measurements showed the α-ZnMoO4 nanoparticles were mesoporous and had Zn2+ and Mo6+ oxidation states, respectively. From UV–Visible spectra, a better spectral selectivity region was observed at higher reaction times, and the bandgap values were decreased from 2.73 to 2.48 eV. In photocatalytic studies, RhB dye was used as an organic pollutant and achieved a degradation efficiency of 85 % at an optimized reaction time of 24 h. For electrochemical performances, the prepared electrode material showed maximum specific capacitance values of 165 F g−1 and 110 F g−1 for cyclic voltammetry and galvanoststic charge-discharge analysis, respectively.
Maternal COVID-19 Vaccination and Prevention of Symptomatic Infection in Infants
Authors: Cardemil Cristina V. , Cao Yi , Posavad Christine M. , Badell Martina L. , Bunge Katherine , Mulligan Mark J. , Parameswaran Lalitha , Olson-Chen Courtney , Novak Richard M. , Brady Rebecca C. , DeFranco Emily , Gerber Jeffrey S. , Pasetti Marcela , Shriver Mallory , Coler Rhea , Berube Bryan , Suthar Mehul S. , Moreno Alberto , Gao Fei , Richardson Barbra A. , Beigi Richard , Brown Elizabeth , Neuzil Kathleen M. , Munoz Flor M. ,   MOMI-Vax Study Group
Published: February 2024

BACKGROUND AND OBJECTIVES
Maternal vaccination may prevent infant coronavirus disease 2019 (COVID-19). We aimed to quantify protection against infection from maternally derived vaccine-induced antibodies in the first 6 months of an infant’s life.

METHODS
Infants born to mothers vaccinated during pregnancy with 2 or 3 doses of a messenger RNA COVID-19 vaccine (nonboosted or boosted, respectively) had full-length spike (Spike) immunoglobulin G (IgG), pseudovirus 614D, and live virus D614G, and omicron BA.1 and BA.5 neutralizing antibody (nAb) titers measured at delivery. Infant severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection was determined by verified maternal-report and laboratory confirmation through prospective follow-up to 6 months of age between December 2021 and July 2022. The risk reduction for infection by dose group and antibody titer level was estimated in separate models.

RESULTS
Infants of boosted mothers (n = 204) had significantly higher Spike IgG, pseudovirus, and live nAb titers at delivery than infants of nonboosted mothers (n = 271), and were 56% less likely to acquire infection in the first 6 months (P = .03). Irrespective of boost, for each 10-fold increase in Spike IgG titer at delivery, the infant’s risk of acquiring infection was reduced by 47% (95% confidence interval 8%–70%; P = .02). Similarly, a 10-fold increase in pseudovirus titers against Wuhan Spike, and live virus nAb titers against D614G, and omicron BA.1 and BA.5 at delivery were associated with a 30%, 46%, 56%, and 60% risk reduction, respectively.

CONCLUSIONS
Higher transplacental binding and nAb titers substantially reduced the risk of SARS-CoV-2 infection in infants, and a booster dose amplified protection during a period of omicron predominance. Until infants are age-eligible for vaccination, maternal vaccination provides passive protection against symptomatic infection during early infancy.
Implementation of NOA@PAT
Authors: Rossmann Roger , Winkler Lennart , Böse Sebastian , Sippel Leon 
Published: February 2024

Due to the publication of the NAMUR Open Architecture (NOA), there are new oppurtunities to digitalize the existing process industry. The acquisition and direct forwarding to the target address is especially for the operation of process analytical technologies (PAT) of interest to improve efficiency and avaliability. In this article, the deeper benefit of NOA for PAT is outlined by presenting the advantages of standardized information models for PAT vitality data. Furthermore, the successful implementation of a NOA use case for PAT is shown in terms of the field wiring, the generation of the information model and the IT/OT transfer. At last, open aspects to achieve a comprehensive NOA implementation in existing installations are mentioned.
Isolated cerebral varices: clinical observations and literature review
Authors: Senko I. V. , Ryzhkova E. S. , Patsap O. I. , Dolgushin M. B. 
Published: February 2024

The aim of the study is to present rare clinical cases of isolated cerebral varices, summarize scientific literature data on their diagnosis and treatment.The article describes 2 clinical observations of isolated cerebral varix, presents a literature review of this topic, as well as treatment tactics for patients with this pathology.In the first clinical observation, in a male 72‑year-old patient isolated cerebral varix was interpreted as distal saccular aneurysm of the right middle cerebral artery per computed angiography data. Surgical treatment was performed: from subtemporal approach in the area of the floor of the middle cranial fossa, cerebral varix, inflow and outflow veins were visualized. The inflow and outflow veins were clipped, aneurysm was resected and sent to histological examination. The patient was discharged on day 8 after surgery. Histological examination of the cerebral varix wall showed typical components for a venous wall, in particular, individual smooth muscle fibers, absence of elastic membrane.In the second clinical observation, in a female 59‑year-old patient magnetic resonance (MR) imaging, MR angiography and MR venography in the projection of anterior basal parts of the left temporal area showed an aneurysmal malformation transitioning into the superficial middle cerebral vein. Taking into consideration venous pathogenesis of the vascular lesion, dynamic observation of the patient was chosen.Isolated cerebral varix is a rare vascular pathology without a specific clinical and instrumental picture. To avoid erroneous diagnosis and determine further treatment tactics, additional examinations are recommended: MR imaging, MR angiography and MR venography.
Paper on role of cervical disc replacement surgery in cervical pivd patients in both elderly and young population and it’s comparison with anterior cervical dissectomy and fusion
Authors: Patel Dhrumil , Patel Dhruv , Ayar Khanjan 
Published: February 2024

For more than fifty years, anterior cervical discectomy and fusion (ACDF) has been a widely accepted operation for cervical spine degenerative diseases, including disc herniation and spondylosis, that are refractory to medical management. The high rates of success and patients’ satisfaction with ACDF has made the operation a standard of care in common neurosurgical practice, however, the advantages of cervical disc arthroplasty (CDA) over fusion including maintaining normal neck motion and reducing degeneration of adjacent segments of the cervical spineTo study the role of cervical disc replacement surgery in cervical pivd patients in both elderly and young population and it’s comparison with anterior cervical dissectomy and fusion with age variability taken into consideration. The inclusion and exclusion criteria used, The operative procedure for both ACDF and CDA, The further follow up studies considering clinical as well as radiological outcome The most commonly indexed levels of CDA were C4–5 and C5–6, accounting for 85%of the entire series.The clinical outcomes, including VAS of neck and arm pain, NDI, and JOA scores were all similarly satisfactory after the surgery, during the follow-up. CDAs has been demonstrated to preserve segmental motion at long-term followup and to decrease the incidence of adjacent-level surgery, as compared to ACDF. Cervical global alignment and the segmental angle at rest improves after cervical arthroplasty
A rare case report on subcutaneous dirofilariasis in Kerala, South India
Authors: Revi Arunkumar Nelliparambil , Revi Sreekumar Nelliparambil , Abraham Usha Mary 
Published: February 2024

The genus includes vector-borne filarial nematodes, which usually infect carnivore hosts. This report aims to investigate various clinical manifestations of Human Dirofilariasis. A 44-year-old lady presented with a complaint of left neck pain of 2 weeks duration. On examination, a 2 x 2 cm swelling with tenderness was noted in the upper 1/3rd of the left sternocleidomastoid muscle. The patient was subjected to further investigations. The ultrasonography revealed a nodular lesion measuring 10.4 x 6.7 x 6.9 mm in the upper part of the left sternocleidomastoid muscle with alive moving dirofilarial worms. An excision Biopsy was performed and an HPE confirmed the diagnosis of intramuscular Dirofilariasis. In order to decrease the incidence of this disease through accurate diagnosis, and patient care, it is crucial to track the cases of human Dirofilariasis and increase awareness of these infections, diagnostic procedures, and vector control techniques.
Different levels of physical activity and postural balance in women with multiple sclerosis
Authors: Machado Eduarda F. A. , Moraes Andrea G. , Bueno Guilherme A. S. , Dos Santos Mendes Felipe A. , De David Ana C. 
Published: February 2024

BACKGROUND:Multiple Sclerosis (MS) presents some clinical manifestations that may indicate motor, sensory and cognitive dysfunctions. Motor dysfunctions in MS are related to balance impairment, muscle weakness, gait, and fatigue and can lead to a significant decrease in quality of life. Postural balance is crucial for daily life activities and can be assessed by posturography.
AIM:The primary objective was to evaluate the influence of different levels of habitual physical activity (PA) on postural balance in women with MS. Additionally, we included an evaluation of walking, mobility, fatigue, and quality of life.
METHOD:This is a cross-sectional study with 25 women with MS. Habitual PA was measured using the Baecke-Questionnaire, separated into low-level (LL) and high-level (HL) PA. Posturography was used to evaluate postural balance and obtain displacement of the center of pressure (CoP-speed, CoP-area). We evaluated gait spatiotemporal-parameters (GAITRite), walking performance (6MWT), functional mobility (TUG), fatigue (FSS, MFIS), and quality-of-life (FAMS).
RESULTS:The difference in CoP-speed and CoP-area was significant (p<0.05) with LL group presented greater values than the HL group. We found a medium effect size CoP-speed (Cohen’s d=0.6) and higher CoP-area (Cohen’s d=1.1). No significant differences with the other variables were found.
CONCLUSION:The results showed that the group with a LL PA presented worse postural balance compared to the group HL. Although level of PA and balance seem to be related, the results of this cross-sectional study could not confirm a causal inference. It is important to develop different strategies to increase PA levels and posture balance in women with MS.
Time-dependent S-wave areas predict sudden cardiac death risk: a prospective, multicentre registered study
Authors: Wang Xinfeng , Liu Wenhao , Zheng Ziheng , Gu Wenli , Chen Zhiteng , Guo Qi , Wu Liqun , Xu Wei , Su Yangang , Chen Keping , Wu MaoXiong , Chen Qian , Xie Xiangkun , Wu Xiaoying , Liu Xiao , Li Hongwei , Yang Yuedong , Zhang Yuling , Chen Yangxin , Qi Mengling , Zhao Huiying 
Published: February 2024

Abstract
Objectives
The present study aimed to detect novel and time-dependent ECG parameters by analysing 24-h ECG data, especially the area under ECG waves.
Design:
Prospective, multicentre cohort study
Setting:
Four hospitals in China
Participants:
High risk of sudden cardiac death, including 43 survivors of sudden cardiac death (SCD) or patients who suffered haemodynamic disorder due to sustained ventricular tachycardia/ventricular fibrillation (SCDHR group), 138 patients with HF who did not experience sustained ventricular tachycardia/ventricular fibrillation but were diagnosed with dilated cardiomyopathy or ischaemic cardiomyopathy with LVEF ≤ 35% (HF group), and 108 healthy controls who presented with no heart disease (HC group).
Exposure:
Time-dependent ECG parameters by analysing 24-h ECG data
Main outcome measures:
The area under ECG waves was separately analysed to determine their associations with SCDHR and HF in the test set and was further examined in the validation set. Logistic regression analyses were performed.
Results
The multivariate logistic regression model for discriminating SCDHR patients and HCs indicated that the average area under the S-wave (inteS_mean) at 16:00–21:00 was positively associated with SCDHR (OR > 1, P-adjust < 0.050) and significantly (P value = 0.014) differed at 21:39 in the validation set. Similarly, the model for discriminating HF and HC indicated that the inteS_mean, minimum S-wave area (inteSm), and difference in S-wave and T-wave (inteST) were positively (OR > 1, P-adjust < 0.050) associated with HF in both the test set and validation set.
Conclusions
The time-dependent S-wave area-related ECG parameters (inteS_mean, inteSm, and inteST) are potentially early predictive factors for SCD risk.
Trial registration:
This study was registered on the website of http://register.clinicaltrails.gov/Organization. The Clinical Trials ID is NCT03485079.
An Ecological Perspective to Master the Complexities of the Digital Economy
Authors: Rovenskaya Elena , Ivanov Alexey , Hathiari Sarah , Kotova Daria , Sharler Ursula , Boza Gergely 
Published: February 2024

Abstract
Economic and social interactions are shifting to the digital space, facilitated by digital platforms. Successful platforms grow into vast ecosystems combining multiple offerings, where diverse users derive value from interactions while ecosystem orchestrators harvest massive revenue. The success of the ecosystem business model stems from their ability to swiftly adapt to fast-changing environments, including new technologies and volatile demands. Adaptation happens through dynamic innovation in a decentralised decision-making setting, which renders digital platform ecosystems complex adaptive systems (CAS). Utilizing extensive knowledge on natural ecosystems as prime examples of a CAS, the paper proposes a systematic framework for understanding and describing digital platform ecosystems, rooted in evolution and ecology. The 5M Framework organizes the complexity of the digital economy into a hierarchy of interconnected elements and processes. As platforms face heightened scrutiny about their socio-economic power and societal value, the framework can facilitate the development of sustainable governance of the digital economy.
Generation Mechanism and Surface Characteristics of Axial Ultrasonic Vibration-assisted Milling (AUVAM) Micro-Texture
Authors: cao qingyuan , chen xintong , zhang zongbo , zhang rui 
Published: February 2024

Abstract

AUVAM is a theoretically promising method for manufacture of complex micro-textures on the workpiece surface due to its low cost and high efficiency. However, due to the generation mechanism of AUVAM processing is indeterminacy, it is difficult to reproduce the ultrasonic amplitude completely. In this paper, the influence of the end cutting edge angle on empty cutting and interference is found to be the main cause for the height of the micro-texture cannot be consistent with the amplitude. The effects of AUVAM parameters including material elastic recovery, relief angle, cutting edge arc radius, feed per tooth and spindle speed on micro-texture profile have been researched. The relationship between milling parameters and wettability is also analyzed. Through controlling these parameters, the whole micro-texture surface consistent with the set amplitude can be directly obtained by AUVAM, a controllable design of surface hydrophobicity is also achieved.
Towards Gamification of Science and Mathematics in Upper Primary Schools in Uganda
Authors: Kanagwa Benjamin , Kahiigi Evelyn Kigozi , Semwanga Agnes Rwashana , Siminyu Samuel , Lubowa Paul 
Published: February 2024

Abstract
The research involved a needs assessment study for the application of gamification technology in teaching and learning of science and mathematics in upper primary (P5, P6 and P7)- typically 10 to 13 year olds. Gamification in education has been praised to create competition, critical thinking and collaborative engagement, which support construction of new knowledge, thus creating a positive learning environment. The research aim was to establish the challenging topics (hard to understand) in Science and Mathematics developing computer based gamification that would be used to support the teaching and learning. Additionally the research was used to identify the ICT training needs of the staff. It was observed that topics that relate to systems such as digestive system, blood circulation system, reproductive system were challenging in science. Challenging topics in mathematics included integers, sets and fractions.
Characteristics of soil CO2 and CH4 fluxes in birch forests during the autumn freeze‒thaw period in the permafrost region of the Daxing′an Mountains, Northeast China
Authors: Gao Minglei , Man Xiuling 
Published: February 2024

Abstract
The autumn freeze-thaw period is an important period to influence soil carbon dynamics. However, the activities of soil CO2 and CH4 in different stand ages of birch forests in high latitude perennial permafrost regions of China during this period are not clear. Therefore, in this study, we investigated soil CO2 and CH4 fluxes in 30a, 45a, and 66a Brich forests in the Daxing'an Mountains permafrost zone, and established the relationships between soil CO2 and CH4 fluxes and soil temperature and humidity, and soil active carbon and nitrogen. The results showed that soil CO2 and CH4 fluxes of all three stand ages showed a gradual decrease during the monitoring period. Soil CO2 and CH4 fluxes showed a trend of increasing and then decreasing with stand age. The average soil CO2 flux of 30a (19.24±4.03) mg·m-2 h-1 was the lowest throughout the monitoring period and was significantly smaller than that of the other two stand ages (P<0.05). 45a and 66a had average soil CO2 fluxes of 36.44±5.20 mg·m-2 h-1 and 35.49±4.22 mg·m-2 h-1, respectively, which were not significantly different from each other (P>0.05). The average uptake fluxes of 45a (-25.92±3.55) μg·m-2 h-1 > 66a (-24.73±4.01) μg·m-2 h-1 > 30a (-12.22±2.33) μg·m-2 h-1, and 30a was highly significantly smaller than 45a and 66a (P<0.01), and the difference between 45a and 66a was not significant (P>0.05). Soil temperature and moisture were both highly significant on soil CO2 and CH4 fluxes. NO3--N and MBC/N had greater effects on soil CO2 and CH4. The global warming potentials ranged from 2171.84—4132.93 kg/hm-2.