bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optical parametric oscillator and amplifier providing tunable, narrowband nanosecond laser pulses in the mid-infrared with mJ pulse energy
Authors: Kinder Jan Frederic , Moneke Benedikt , Ernst Oskar , Halfmann Thomas 
Published: September 2022

AbstractWe report on an all-solid-state light source for nanosecond (ns) laser pulses, with broad tunability in the mid-infrared, spectral bandwidth close to the Fourier transform limit, and pulse energy in the mJ regime. To this end, we extend a tunable, continuous wave (cw) singly resonant optical parametric oscillator by an optical parametric pre-amplifier with a periodically poled lithium niobate crystal and a power amplifier stage with two bulk lithium niobate crystals. We demonstrate pulse energies beyond 1 mJ in a tuning range between 3.3 and 3.8 $$\upmu \mathrm {m}$$

μ
m

center wavelength, with options for even larger output pulse energy and tuning range. The total conversion efficiency in the power amplifier reaches 20%. From measurements of absorption spectroscopy, we determine a very narrow linewidth of 108 MHz (full width at half maximum, FWHM), which is only a factor of 1.4 above the Fourier limit. We demonstrate the applicability and versatility of the laser system for nonlinear spectroscopy by resonantly enhanced third harmonic generation and sum frequency mixing in a gas sample of HCl molecules.
Generalized Turán Problems for Complete Bipartite Graphs
Authors: Gerbner Dániel , Patkós Balázs 
Published: September 2022

AbstractFor graphs H, F and integer n, the generalized Turán number ex(n, H, F) denotes the maximum number of copies of H that an F-free n-vertex graph can have. We study this parameter when both H and F are complete bipartite graphs.
Persistence with tamoxifen and aromatase inhibitors in Germany: a retrospective cohort study with 284,383 patients
Authors: Gremke Niklas , Griewing Sebastian , Chaudhari Saket , Upadhyaya Swati , Nikolov Ivan , Kostev Karel , Kalder Matthias 
Published: September 2022

Abstract
Purpose
The aim of this study was to analyze the persistence of women on tamoxifen (TAM) and aromatase inhibitors (AIs) in Germany, and to investigate possible determinants of non-persistence.

Methods
The present retrospective cohort study was based on the IQVIA longitudinal prescription database (LRx). The study included women with an initial prescription of TAM or AIs (anastrozole, letrozole, and exemestane) between January 2016 and December 2020 (index date). Kaplan–Meier analyses were performed to show the persistence for TAM and AI, using a therapy gap of 90 or 180 days, respectively. A multivariable Cox proportional hazards regression model was further used to estimate the relationship between non-persistence and drug prescription (AI versus TAM), age, and the specialty of the physician initiating therapy (gynecologist, oncologist, or general practitioner).

Results
Up to 5 years after the index date, only 35.1% of AI and 32.5% of TAM patients were continuing therapy when therapy discontinuation was defined as at least 90 days without therapy. Using a 180-day therapy gap, 51.9% of AI and 50.4% of TAM patients remained on therapy after 5 years. Cox regression models reveal that initial therapy with TAM (HR 1.06, 95% CI 1.04–1.07), therapy initiation by oncologists (HR 1.09, 95% CI 1.07–1.11), or general practitioners (HR 1.24, 95% CI 1.21–1.27) and age ≤ 50 (HR 1.08, 95% CI 1.06–1.10) were significantly associated with an increased risk of therapy discontinuation.

Conclusion
Overall, the present study indicates that persistence rates are low in all age groups for both TAM and AI treatment. We found several factors (e.g., physician specialty, younger age, and type of endocrine therapy) to be associated with an increased risk for non-persistence.
Multilevel thresholding satellite image segmentation using chaotic coronavirus optimization algorithm with hybrid fitness function
Authors: Hosny Khalid M. , Khalid Asmaa M. , Hamza Hanaa M. , Mirjalili Seyedali 
Published: September 2022

AbstractImage segmentation is a critical step in digital image processing applications. One of the most preferred methods for image segmentation is multilevel thresholding, in which a set of threshold values is determined to divide an image into different classes. However, the computational complexity increases when the required thresholds are high. Therefore, this paper introduces a modified Coronavirus Optimization algorithm for image segmentation. In the proposed algorithm, the chaotic map concept is added to the initialization step of the naive algorithm to increase the diversity of solutions. A hybrid of the two commonly used methods, Otsu’s and Kapur’s entropy, is applied to form a new fitness function to determine the optimum threshold values. The proposed algorithm is evaluated using two different datasets, including six benchmarks and six satellite images. Various evaluation metrics are used to measure the quality of the segmented images using the proposed algorithm, such as mean square error, peak signal-to-noise ratio, Structural Similarity Index, Feature Similarity Index, and Normalized Correlation Coefficient. Additionally, the best fitness values are calculated to demonstrate the proposed method's ability to find the optimum solution. The obtained results are compared to eleven powerful and recent metaheuristics and prove the superiority of the proposed algorithm in the image segmentation problem.
The influence of cations on α-lactalbumin amyloid aggregation
Authors: Antosova Andrea , Gancar Miroslav , Bednarikova Zuzana , Marek Jozef , Bystrenova Eva , Gazova Zuzana 
Published: September 2022

AbstractThere is limited knowledge regarding α-lactalbumin amyloid aggregation and its mechanism. We examined the formation of α-lactalbumin amyloid fibrils (α-LAF) in the presence of cations (Mg2+, Ca2+, Na+, K+, NH4+, and Cs+) in the form of chloride salts at two concentrations. We have shown that studied cations affect the conformation of α-lactalbumin, the kinetics of its amyloid formation, morphology, and secondary structure of α-LAF in a different manner. The higher salts concentration significantly accelerated the aggregation process. Both salt concentrations stabilized α-lactalbumin's secondary structure. However, the presence of divalent cations resulted in shorter fibrils with less β-sheet content. Moreover, strongly hydrated Mg2+ significantly altered α-lactalbumin's tertiary structure, followed by Na+, NH4+, K+, and weakly hydrated Cs+. On the other hand, Ca2+, despite being also strongly hydrated, stabilized the tertiary structure, supposedly due to its high affinity towards α-lactalbumin. Yet, Ca2+ was not able to inhibit α-lactalbumin amyloid aggregation.
Graphic abstract
Sensory Processing Difficulties in Children and Adolescents with Obsessive-Compulsive and Anxiety Disorders
Authors: Cervin Matti 
Published: September 2022

AbstractAltered sensory processing has been linked to symptoms of obsessive-compulsive disorder (OCD) and anxiety disorders (ADs) in youth, but few studies have examined sensory processing in clinical samples and no study has analyzed self-report data from youth meeting diagnostic criteria for OCD or ADs. This study included 86 youth with OCD, 82 youth with ADs, and 46 youth without psychiatric disorders. Participants completed the adolescent version of the Sensory Profile and scales measuring three symptom dimensions of OCD, four symptom dimensions of anxiety, and symptoms of major depression. Results showed that different forms of sensory processing difficulties (sensitivity, avoidance, low registration) were adequately captured by one broad sensory processing factor. Youth with OCD and ADs reported statistically significantly more sensory difficulties than youth without psychiatric disorders, but the two clinical groups did not differ from each other. Altered sensory processing in the clinical groups was not explained by the presence of neurodevelopmental disorders. Sensory difficulties were moderately to strongly related to all self-reported symptom dimensions, and uniquely related to the OCD dimension of symmetry/ordering and the anxiety dimensions of panic and social anxiety. Most youth in the clinical groups were classified as having difficulties with sensory processing. The present study shows that sensory processing difficulties are common in youth with OCD and ADs, not explained by co-occurring neurodevelopmental disorders, and linked to a host of internalizing symptoms. More research is needed to identify whether sensory processing difficulties precede, follow, or mutually reinforce the development of OCD and ADs in youth.
Multi-temporal UAV Imaging-Based Mapping of Chlorophyll Content in Potato Crop
Authors: Yin Hang , Huang Weili , Li Fei , Yang Haibo , Li Yuan , Hu Yuncai , Yu Kang 
Published: September 2022

AbstractSpectral indices based on unmanned aerial vehicle (UAV) multispectral images combined with machine learning algorithms can more effectively assess chlorophyll content in plants, which plays a crucial role in plant nutrition diagnosis, yield estimation and a better understanding of plant and environment interactions. Therefore, the aim of this study was to use UAV-based spectral indices deriving from UAV-based multispectral images as inputs in different machine learning models to predict canopy chlorophyll content of potato crops. The relative chlorophyll content was obtained using a SPAD chlorophyll meter. Random Forest (RF), support vector regression (SVR), partial least squares regression (PLSR) and ridge regression (RR) were employed to predict the chlorophyll content. The results showed that RF model was the best performing algorithm with an R2 of 0.76, Root Mean Square Error (RMSE) of 1.97. Both RF and SVR models showed much better accuracy than PLSR and RR models. This study suggests that the best models, RF model, allow to map the spatial variation in chlorophyll content of plant canopy using the UAV multispectral images at different growth stages.
The Impact of COVID-19 Outbreak on Camping Tourism in Spain: A Spatial Approach to Tourist Destinations
Authors: Sánchez-Sánchez Francisca Jesús , Sánchez-Sánchez Ana María 
Published: September 2022

AbstractThe COVID-19 health crisis has wreaked devastation on the world economy, especially on the tourism sector. The camping sector has been little studied despite its high economic impact and participation rate. Moreover, the observable effects of phenomena such as the COVID-19 pandemic have received little research attention. Consequently, the objective of this paper is therefore to analyse the effects of the pandemic on camping tourism by characterising the factors that determine it. The study is carried out by providing a geographical perspective of the sector by tourist areas, whereby two types of tourist destinations are considered: campsites located in coastal areas, and campsites located in natural areas. This is the main contribution of the work, as the proposed geographical analysis studies smaller territorial units than those usually used in tourism research. For the study, Multivariate Analysis techniques are applied, specifically Factor Analysis and Cluster Analysis. The results show that there is a balance between supply and demand in the sector, with a significant economic impact, especially on employment and the performance of the sector. The impact of the COVID-19 pandemic has led to nature tourism gaining greater popularity, and shows an evolution in travellers' preferences for tourist destinations in favour of campsites located in natural areas over those located in coastal destinations. The geographical location of the tourist destination, therefore, plays a key role in the characterisation of Spanish campsites. This has practical implications for both camping companies and institutions, as the fact that some areas are more attractive than others is a decisive factor in deciding on the location of new campsites.
Globalizing Europe
Authors: Motadel David 
Published: September 2022

Abstract
This essay offers a reflection on the historical study of modern Europe’s entanglements with the wider world. It explores the ways in which European history can be integrated into global history, considering Europe as not only an engine but also a product of global transformations. Providing a broad historiographical overview, the author discusses the impact of the “global turn” on different fields of modern European history, including political, economic, social, intellectual, and environmental history. He argues that global history represents not only a challenge but also a huge opportunity for Europeanists to open up modern European history. This will ultimately help us reshape our understanding of the boundaries of Europe—and the field of European history itself. In other words, it will allow us to deprovincialize Europe. More generally, the essay also engages with broader questions about continents (and other spatial units) as ontological categories in historical studies.
A comprehensive and bibliometric review on the blockchain-enabled IoT technology for designing a secure supply chain management system
Authors: Li Yacheng , Zhu Xiaoyan , Darbandi Mehdi 
Published: September 2022

AbstractBlockchain is a well-known prominent technology that has gotten a lot of interest beyond the financial industry, attracting researchers and practitioners from numerous businesses and fields. Specific uses of blockchain in supply chain management (SCM) are addressed in business practice. By combining two perspectives on blockchain in SCM, this study provides comprehensive knowledge in this field using a bibliometric approach. We will explore the worldwide research trend in related topic areas. By collecting data from the Web of Science, we collected 400 articles related to our research topic from 2016 until early 2021. We eliminated research in the form of technical reports, editorials, comments, and consultancy articles to maintain the quality of the data gathering. VOSviewer is used to create visualization maps based on text and bibliographic information. The examination uncovered helpful information, such as annual publishing and citation patterns, the top research topic, the top authors, and the most supporting funding organizations in this field.
Impact of Subsidiary TMT Network Attention on Innovation: The Moderating Role of Subsidiary Autonomy
Authors: Wang Shi-quan , Zhang Shuang , Shang Guo-yin 
Published: September 2022

ABSTRACTThis article takes group subsidiaries that were listed in the A-share market of Shanghai and Shenzhen Stock Exchanges in China from 2012 to 2017 as the research subject and innovatively explores the impact of subsidiary TMT (top management team) attention at different networks on subsidiary innovation, considering dual network embedding characteristics and autonomy of subsidiaries. Results show that subsidiary TMT group network attention will inhibit subsidiary innovation, while their external network attention will promote subsidiary innovation, after the inclusion of industry category factors, the effect has changed accordingly, but the moderating effect of subsidiary autonomy on the relationship between subsidiary TMT attention on different networks and subsidiary innovation is always significant. The identification of subsidiary TMT attention not only supplements to current literature's narrow focus on impact of the group parent company attention on subsidiary behaviors, but also broadens theoretical understanding of the driving factors of innovation behavior of subsidiaries. Through expounding on the moderating role of subsidiary autonomy, this article clarifies boundary conditions of subsidiary TMT attention's impact on subsidiary innovation and provides operable guidance for subsidiary TMT to allocate and utilize their attention to promote the development of subsidiary innovation behaviors.
THE PAUCITY PROBLEM FOR CERTAIN SYMMETRIC DIOPHANTINE EQUATIONS
Authors: WOOLEY TREVOR D. 
Published: September 2022

AbstractLet$\varphi _1,\ldots ,\varphi _r\in {\mathbb Z}[z_1,\ldots z_k]$be integral linear combinations of elementary symmetric polynomials with$\text {deg}(\varphi _j)=k_j\ (1\le j\le r)$, where$1\le k_1<k_2<\cdots <k_r=k$. Subject to the condition$k_1+\cdots +k_r\ge \tfrac {1}{2}k(k-~1)+2$, we show that there is a paucity of nondiagonal solutions to the Diophantine system$\varphi _j({\mathbf x})=\varphi _j({\mathbf y})\ (1\le j\le r)$.
GROUPS IN WHICH ALL LARGE SUBGROUPS HAVE BOUNDED NEAR DEFECT
Authors: SABATINO GIULIA 
Published: September 2022

AbstractIf G is a group with subgroup H and m, k are two fixed nonnegative integers, H is called an
$(m,k)$
-subnormal subgroup of G if it has index at most m in a subnormal subgroup of G of defect less than or equal to k. We study the behaviour of uncountable groups of cardinality
$\aleph $
where all subgroups of cardinality
$\aleph $
are
$(m,k)$
-subnormal.
Cognitive effects of guarana supplementation with maximal intensity cycling
Authors: Gurney Tom , Bradley Naomi , Izquierdo Dionisio , Ronca Flaminia 
Published: September 2022

AbstractThe aim of this study was to investigate the effects of guarana supplementation on cognitive performance before and after a bout of maximal intensity cycling and to compare this to an equivalent caffeine dose. Twenty-five participants completed the randomised double-blind crossover trial by performing cognitive tests with one of three supplements, on three different days: guarana (125 mg/kg), caffeine (5 mg/kg) or placebo (65 mg/kg protein powder). After 30 min of rest, participants performed simple (SRT) and choice reaction time (CRT) tests, an immediate word recall test and Bond–Lader mood scale. This was followed by a cycling V̇O2max test, and cognitive tests were then immediately repeated. Guarana supplementation decreased CRT before exercise (407 (sd 45) ms) in comparison with placebo (421 (sd 46) ms, P = 0·030) but not caffeine (417 (sd 42) ms). SRT after exercise decreased following guarana supplementation (306 (sd 28) ms) in comparison with placebo (323 (sd 32) ms, P = 0·003) but not caffeine (315 (sd 32) ms). Intra-individual variability on CRT significantly improved from before (111·4 (sd 60·5) ms) to after exercise (81·85 (sd 43·1) ms) following guarana supplementation, and no differences were observed for caffeine and placebo (P > 0·05). Alertness scores significantly improved following guarana supplementation (63·3 (sd 13·8)) in comparison with placebo (57·4 (sd 13·4), P = 0·014) but not caffeine (61·2 (sd 12·8)). There were no changes to V̇O2max, immediate word recall or any other Bond–Lader mood scales. Guarana supplementation appears to impact several parameters of cognition. These results support the use of guarana supplementation to possibly maintain speed of attention immediately following a maximal intensity exercise test (V̇O2max).
The global disease burden attributable to a diet low in fibre in 204 countries and territories from 1990 to 2019
Authors: Zhuo Ming , Chen Ze , Zhong Mao-Lin , Liu Ye-Mao , Lei Fang , Qin Juan-Juan , Sun Tao , Yang Chengzhang , Chen Ming-Ming , Song Xiao-Hui , Wang Li-Feng , Li Yi , Zhang Xiao-Jing , Zhu Lihua , Cai Jingjing , Ye Jun-Ming , Zhou Gang , Zeng Yong 
Published: September 2022

AbstractObjective:The relationship of a diet low in fibre with mortality has not been evaluated. This study aims to assess the burden of non-communicable chronic diseases (NCD) attributable to a diet low in fibre globally from 1990 to 2019.Design:All data were from the Global Burden of Disease (GBD) Study 2019, in which the mortality, disability-adjusted life-years (DALY) and years lived with disability (YLD) were estimated with Bayesian geospatial regression using data at global, regional and country level acquired from an extensively systematic review.Setting:All data sourced from the GBD Study 2019.Participants:All age groups for both sexes.Results:The age-standardised mortality rates (ASMR) declined in most GBD regions; however, in Southern sub-Saharan Africa, the ASMR increased from 4·07 (95 % uncertainty interval (UI) (2·08, 6·34)) to 4·60 (95 % UI (2·59, 6·90)), and in Central sub-Saharan Africa, the ASMR increased from 7·46 (95 % UI (3·64, 11·90)) to 9·34 (95 % UI (4·69, 15·25)). Uptrends were observed in the age-standardised YLD rates attributable to a diet low in fibre in a number of GBD regions. The burden caused by diabetes mellitus increased in Central Asia, Southern sub-Saharan Africa and Eastern Europe.Conclusions:The burdens of disease attributable to a diet low in fibre in Southern sub-Saharan Africa and Central sub-Saharan Africa and the age-standardised YLD rates in a number of GBD regions increased from 1990 to 2019. Therefore, greater efforts are needed to reduce the disease burden caused by a diet low in fibre.
Declining Basal Motion Dominates the Long‐Term Slowing of Athabasca Glacier, Canada
Authors: Armstrong William H. , Polashenski David , Truffer Martin , Horne Greg , Hanson Jacob B. , Hawley Robert L. , Hengst Anthony M. , Vowels Lily , Menounos Brian , Wychen Wesley Van 
Published: September 2022

AbstractGlobally, glaciers are shrinking in response to climate change, with implications for global sea level rise as well as downstream ecosystems and water resources. Sliding at the ice‐bed interface (basal motion) provides a mechanism for glaciers to respond rapidly to climate change. While the short‐term dynamics of glacier basal motion (<10 years) have received substantial attention, little is known about how basal motion and its sensitivity to subglacial hydrology changes over long (>50 year) timescales—this knowledge is required for accurate prediction of future glacier change. We compare historical data with modern estimates from field and satellite data at Athabasca Glacier and show that the glacier thinned by 60 m (−21%) over 1961–2020. However, a concurrent increase in surface slope results in minimal change in the average driving stress (−6 kPa and −4%). These geometric changes coincide with relatively uniform slowing (−15 m a−1 and −45%). Simplified ice modeling suggests that declining basal motion accounts for most of this slow down (91% on average and 46% at minimum). A decline in basal motion can be explained by increasing basal friction resulting from geometric change in addition to increasing meltwater flux through a more efficient subglacial hydrologic system. These results highlight the need to include time‐varying dynamics of basal motion in glacier models and analyses. If these findings are generalizable, they suggest that declining basal motion reduces the flux of ice to lower elevations, helping to mitigate glacier mass loss in a warming climate.