bluuebunny/crossref_metadata_2025_split huggingface dataset:
Students' Digital Competence and Perceived Learning: The mediating role of Learner Agility
Authors: Patwardhan Vidya , Mallya Jyothi , Shedbalkar Rahul , Srivastava Sandeep , Bolar Kartikeya 
Published: February 2023

Background: The ravages of COVID-19 escalated the penetration of online education and usage of digital technologies. While educational institutions across the globe adopted different forms of computer-mediated communication, the institutes in India have gradually attuned to the new normal, notwithstanding the initial glitches of adopting new technology and shifting to blended. It became increasingly significant to gain a better understanding of students’ perspectives of newly emerged learning environment. This motivated the researchers to study the digital competencies (DC) and their impact on students’ learning agility (LA) and perceived learning (PL) in professional/technical education. Methods: In this cross-sectional study, a DigiComp 2.1 framework was attempted to investigate the relationship between DC and PL among higher education students in India. The data from 359 graduate and post-graduate students were analyzed using Structural equation modelling and Process Macro 4.0. Results: The findings of this study revealed that DC has a significant positive impact on PL (b = 0.33; p < 0.001), indicating that higher learners' DC leads to higher learning outcomes. Similarly, DC also had a significant positive impact on LA (b = 0.59; p < 0.001), suggesting that the higher DC of learners leads to higher learning agility. Further, a positive significant relationship was also found between LA and PL (b = 0.21; p < 0.001). This significant positive path reveals that higher learners' agility leads to higher student learning outcomes. Discussion: Post-COVID, DC, a technology-related skill set is linked to the academic performance of teachers and students. Our findings reveal that DC significantly positively impacts PL and LA. Therefore, we recommend that the higher educational institutes in India consider the inclusion of DC in their curriculum as a fundamental competence for a better learning outcome for learners.
Fair Dynamic Rationing
Authors: Manshadi Vahideh , Niazadeh Rad , Rodilitz Scott 
Published: February 2023

We study the allocative challenges that governmental and nonprofit organizations face when tasked with equitable and efficient rationing of a social good among agents whose needs (demands) realize sequentially and are possibly correlated. As one example, early in the COVID-19 pandemic, the Federal Emergency Management Agency faced overwhelming, temporally scattered, a priori uncertain, and correlated demands for medical supplies from different states. In such contexts, social planners aim to maximize the minimum fill rate across sequentially arriving agents, where each agent’s fill rate (i.e., its fraction of satisfied demand) is determined by an irrevocable, one-time allocation. For an arbitrarily correlated sequence of demands, we establish upper bounds on the expected minimum fill rate (ex post fairness) and the minimum expected fill rate (ex ante fairness) achievable by any policy. Our upper bounds are parameterized by the number of agents and the expected demand-to-supply ratio, yet we design a simple adaptive policy called projected proportional allocation (PPA) that simultaneously achieves matching lower bounds for both objectives (ex post and ex ante fairness) for any set of parameters. Our PPA policy is transparent and easy to implement, as it does not rely on distributional information beyond the first conditional moments. Despite its simplicity, we demonstrate that the PPA policy provides significant improvement over the canonical class of nonadaptive target-fill-rate policies. We complement our theoretical developments with a numerical study motivated by the rationing of COVID-19 medical supplies based on a standard compartmental modeling approach that is commonly used to forecast pandemic trajectories. In such a setting, our PPA policy significantly outperforms its theoretical guarantee and the optimal target-fill-rate policy. This paper was accepted by Omar Besbes, revenue management and market analytics. Supplemental Material: The data files and online appendices are available at https://doi.org/10.1287/mnsc.2023.4700 .
Bilateral Trade: A Regret Minimization Perspective
Authors: Cesa-Bianchi Nicolò , Cesari Tommaso , Colomboni Roberto , Fusco Federico , Leonardi Stefano 
Published: February 2023

Bilateral trade, a fundamental topic in economics, models the problem of intermediating between two strategic agents, a seller and a buyer, willing to trade a good for which they hold private valuations. In this paper, we cast the bilateral trade problem in a regret minimization framework over T rounds of seller/buyer interactions, with no prior knowledge on their private valuations. Our main contribution is a complete characterization of the regret regimes for fixed-price mechanisms with different feedback models and private valuations, using as a benchmark the best fixed price in hindsight. More precisely, we prove the following tight bounds on the regret: [Formula: see text] for full-feedback (i.e., direct revelation mechanisms). [Formula: see text] for realistic feedback (i.e., posted-price mechanisms) and independent seller/buyer valuations with bounded densities. [Formula: see text] for realistic feedback and seller/buyer valuations with bounded densities. [Formula: see text] for realistic feedback and independent seller/buyer valuations. [Formula: see text] for the adversarial setting. Funding: This work was partially supported by the European Research Council Advanced [Grant 788893] AMDROMA “Algorithmic and Mechanism Design Research in Online Markets”, the Ministero dell’Istruzione, dell’Università e della Ricerca PRIN project ALGADIMAR “Algorithms, Games, and Digital Markets”, the AI Interdisciplinary Institute ANITI (funded by the French “Investing for the Future—PIA3” program under the [Grant agreement ANR-19-PI3A-0004], the project BOLD from the French national research agency (ANR), the EU Horizon 2020 ICT-48 research and innovation action ELISE (European Learning and Intelligent Systems Excellence, [Grant agreement 951847].
Laser Surface Modification of a Low Carbon Steel with Tungsten Carbide and Carbon
Authors: Shen J. , Grünenwald B. , Dausinger F. 
Published: February 2023

For many industrial applications it is sufficient to have a small area of wear resistant surface. For this reason, cheap low carbon steel is chosen for the partial laser surface alloying. Laser alloying experiments of low carbon steel (16MnCrS5) were carried out by powder injection (WC/Co 88/12) and with graphite precoating for comparison. In addition, melt injection of tungsten carbide was used to produce a composite layer with hard tungsten carbide particles embedded in tough metal matrix. Detailed material investigations (metallographical, electromicroscopical and EDX-analyses) were undertaken on the samples obtained with these methods.
The experimental results indicate that for the samples alloyed with carbon, the hardness increases due to martensitic transformation. In the case of alloying with tungsten carbide powder, the hardening mechanism can be subdivided into two regimes: for the low tungsten concentration in the alloyed layers the hardness is increasing due to the martensitic transformation, while for the high tungsten concentration the increase in hardness is mainly resulted from the higher carbide amount in the alloyed layers. Abrasive wear tests on layers alloyed with tungsten carbide indicate that the wear resistance of martensite hardened layers is comparable with that of conventional hardened 100Cr6 steel and the wear resistance of tungsten carbide composite layers is comparable with taht of sintered WC/Co hard metals. By these results a microstructure can be produced as required to suit different wearing situations.
BANKACILIK SEKTÖRÜNDE KREDİ RİSK YÖNETİMİ VE BİR TAHMİN MODELİ ÖRNEĞİ
Authors: DUMAN Selim , YILMAZ TÜRKMEN Sibel 
Published: February 2023

Ekonomik hayatın en önemli aktörlerinden olan firmalar için finansman kaynaklarının etkin şekilde yönetilmesi
önem arz etmektedir. Finansman yapılarının niteliği bu yönetimin başarısına etki ederken, firmalar içsel
ya da dışsal bazı nedenlerle sıklıkla finansman açıklarıyla karşılaşabilmektedirler. Firmaların finansman sağlayıcılarının
başında gelen bankalar ise, ekonomik faaliyetlerin yürütülmesi için üstlendikleri bu görev doğrultusunda
ülke ekonomilerinin büyüme ve kalkınmasında aktif rol oynamaktadırlar. Ancak bankaların üstlendikleri
bu görevle aynı doğrultuda maruz kaldıkları riskler de artmakta ve performanslarını korumaları için başarılı
bir risk yönetimi de zorunlu hale gelmektedir. Bankaların yönetmek zorunda oldukları riskleri çeşitlendirmek
mümkünken, bu risklerin en temel olanı ana ürünleri olan kredinin geri ödenmemesinden kaynaklanan risktir.
Banka portföyleri içinde firma kredilerinin önemli bir paya sahip olduğu dikkate alındığında, firma performanslarının
değerlendirilmesi bankaların alacakları önlemlerin başında gelmektedir. Bu çerçevede, çalışmanın
amacı; bankaların kredi riski konusunda genel bir çerçeve oluşturmak ve bu konuda geliştirilen risk tahmin modellerine
bir örnek sunmaktır. Çalışmada 2011-2018 yıllarını kapsayan bir örneklem kullanılırken, imalat sanayi
sektöründe yer alan firmaların performansları üzerinden kredi risk modeli geliştirilmeye çalışılmıştır. Elde
edilen sonuçlar; faaliyet kar marjı, duran varlıkların aktif içindeki payı, ticari borçların pasif içindeki payı ve net
satışlara göre mali borç düzeyini gösteren oranların imalat sanayi firmalarının performans değerlendirmesinde
etkili olduğunu göstermektedir.
KİTLE FONLAMASI YÖNTEMİ İLE ZEKÂT UYGULAMASI: BİR MODEL ÖNERİSİ
Authors: KAZAK Hasan 
Published: February 2023

Kitle fonlaması, yatırım ihtiyacı olan bir projeyi veya işi finanse edebilmek amacıyla girişimcilerin büyük
insan gruplarından internet tabanlı platformlar vasıtasıyla fon toplamasını ifade eden bir terimdir. Temel mantığı
çok daha öncesine dayanmakla birlikte bugünkü manada kitle fonlaması sisteminin temeli 2008’li yıllara dayanmaktadır.
O günden bugüne popülaritesi sürekli artmış ve güncelliğini halen korumaktadır. Kitle fonlaması
konvansiyonel finans sistemleri açısından olduğu kadar İslami finansal sistemler açısından da oldukça önemlidir.
Kitle fonlaması sistemi İslami yasak ve kurallara uyulması halinde İslami sisteme uyarlanabilir. Bu açıdan
değerlendirildiğinde İslami finansal sistemler içerisinde kitle fonlamasına dayalı sistem ve uygulamaların kurulması
İslam ülkelerinin ekonomik büyüme ve kalkınma süreçlerine katkıda bulunacaktır. Bu çalışmada İslam’ın
en temel emirlerinden birisi olan, İslam ekonomi ve finans sisteminin temelinde yer alan zekât kurumunun kitle
fonlaması yöntemi kullanılarak daha etkin ve verimli şekilde işletilmesine yönelik bir model önerilmiştir. Modelin
özellikle İslam ülkelerinin ekonomik büyüme ve kalkınma süreçlerine katkıda bulunacağı düşünülmektedir.
Striving for a pragmatic contribution of biomarkers results to lifelong health care
Authors: Ferraro Simona , Cereda Cristina , Zuccotti Gianvincenzo , Marcovina Santica , Plebani Mario , Biganzoli Elia Mario 
Published: February 2023

Abstract

Background
The increased role of preventive medicine in healthcare and the rapid technological advancements, have deeply changed the landscape of laboratory medicine. In particular, increased investments in newborn screening tests and policies have been observed. Aim of this paper is to characterize how laboratory professionals engaged in clinical chemistry or newborn screening, in collaboration with experts in econometric, bioinformatics, and biostatistics may address a pragmatic use of laboratory results in the decision-making process oriented toward improvement of health care outcomes.

Content
The effectiveness of biomarkers on healthcare depends on several factors such as analytical performance, prevalence of the disease, integration of the test within the diagnostic algorithm, associated costs, and social/economic impact of false positive and false negative results. Cost-effectiveness analysis needs to be performed and reliability achieved, by overcoming analytical pitfalls and by improving interpretative criteria. These are challenging issues common to clinical chemistry and newborn screening tests. Following the experience in clinical chemistry, one of the main issues to be approached in newborn screening tests, is the lack of harmonization of results obtained by different methods and the limited healthcare effectiveness.

Summary
The focus on prevention is a crucial opportunity for laboratory medicine to change how to approach the effectiveness of biomarkers on healthcare. The consolidation within clinical laboratories of professionals with different technical and methodological expertise coupled with the need to produce and manage large sets of data, require the cooperation of professionals from other disciplines to characterize the impact of the tests on epidemiological outcomes for health care policy making process.
No-go zone for Jews? Examining how news on anti-Semitic attacks increases victim blaming
Authors: von Sikorski Christian , Merz Pascal 
Published: February 2023

Abstract
Antisemitism is on the rise. Recently, discussions have considered so-called “no-go zones for Jews” (city areas Jews should avoid to reduce the likelihood of being attacked). In this context and drawing from attribution theory, we examined if news consumers perceive a Jewish hate crime victim as partly responsible for being attacked when news coverage explicitly emphasizes that the victim displayed religious symbols (kippah) in a certain inner-city location. We conducted a quota-based survey experiment (N = 392) in Germany (4 groups, between-subjects design) and randomly exposed participants to news coverage about an anti-Semitic attack. The article either emphasized that the Jewish victim displayed religious symbols (kippah) or not, and highlighted the specific location of the attack (Berlin synagogue vs. deprived inner-city district of Berlin). Moderated mediation analysis suggested that participants perceived the victim’s behavior to be more provocative when the news article highlighted that the victim displayed religious symbols and when the attack occurred in a deprived Berlin district. Yet, effects were only detected for individuals with low (vs. high) levels of education. Perceived provocativeness in turn increased victim blaming indicating that some individuals indirectly regarded the Jewish victim to be partly responsible for being attacked.
Analytical and therapeutic profiles of DNA methylation alterations in cancer; an overview of changes in chromatin arrangement and alterations in histone surfaces
Authors: Norollahi Seyedeh Elham , Vahidi Sogand , Shams Shima , Keymoradzdeh Arman , Soleymanpour Armin , Solymanmanesh Nazanin , Mirzajani Ebrahim , Jamkhaneh Vida Baloui , Samadani Ali Akbar 
Published: February 2023

Abstract
DNA methylation is the most important epigenetic element that activates the inhibition of gene transcription and is included in the pathogenesis of all types of malignancies. Remarkably, the effectors of DNA methylation are DNMTs (DNA methyltransferases) that catalyze de novo or keep methylation of hemimethylated DNA after the DNA replication process. DNA methylation structures in cancer are altered, with three procedures by which DNA methylation helps cancer development which are including direct mutagenesis, hypomethylation of the cancer genome, and also focal hypermethylation of the promoters of TSGs (tumor suppressor genes). Conspicuously, DNA methylation, nucleosome remodeling, RNA-mediated targeting, and histone modification balance modulate many biological activities that are essential and indispensable to the genesis of cancer and also can impact many epigenetic changes including DNA methylation and histone modifications as well as adjusting of non-coding miRNAs expression in prevention and treatment of many cancers. Epigenetics points to heritable modifications in gene expression that do not comprise alterations in the DNA sequence. The nucleosome is the basic unit of chromatin, consisting of 147 base pairs (bp) of DNA bound around a histone octamer comprised of one H3/H4 tetramer and two H2A/H2B dimers. DNA methylation is preferentially distributed over nucleosome regions and is less increased over flanking nucleosome-depleted DNA, implying a connection between nucleosome positioning and DNA methylation. In carcinogenesis, aberrations in the epigenome may also include in the progression of drug resistance. In this report, we report the rudimentary notes behind these epigenetic signaling pathways and emphasize the proofs recommending that their misregulation can conclude in cancer. These findings in conjunction with the promising preclinical and clinical consequences observed with epigenetic drugs against chromatin regulators, confirm the important role of epigenetics in cancer therapy.
Ayurvedic medicine for the treatment of chronic rhinosinusitis: a systematic review of randomized and non-randomized trials
Authors: Schmale Isaac L. , Nimmagadda Sai V. , Ravikumar Saiganesh , Babb Charles N. , Man Li-Xing 
Published: February 2023

Abstract

Objectives
This article provides a comprehensive systematic review and qualitative analysis of the current research investigating Ayurveda chronic rhinosinusitis (CRS) treatment.

Content
PRISMA guidelines for systematic reviews was followed and our search utilized MEDLINE, Embase, Ayush Portal, and Cochrane Library databases. Articles published prior to March 2022, 10 or more patients that investigated Ayurveda as a treatment for CRS in humans were included. This resulted in thirteen articles meeting inclusion criteria. Ayurvedic treatments included herbal medications for oral consumption, nasal instillation, and steam inhalation used alone or in combination. All studies concluded that Ayurvedic therapy led to improvements in subjective CRS symptoms and objective radiographic and hematologic criteria. However, all 13 studies had a significant risk of bias due to study design and statistical methods utilized.

Summary
Ayurvedic therapy may be a useful CRS treatment for some patients and overall appears to be well tolerated. However, definitive recommendation for when Ayurvedic treatments would be beneficial in the treatment of CRS remains not possible.

Outlook
Given the overall positive effects shown in the current published evidence and growing interest in complementary and integrative therapies, Ayurvedic treatments for CRS deserve further investigation in the form of well-designed controlled trials.
Application and prospect of artificial intellingence in diabetes care
Authors: Jia Weiping , Fisher Edwin B. 
Published: February 2023

Abstract
Diabetes is one of the fastest-growing non-communicable diseases, becoming an important public health concern worldwide as well as in China. Currently, China has the largest population living with diabetes. Artificial intelligence (AI) is a fast-growing field and its applications to diabetes could enable the delivery of better management services for people with diabetes. This perspective summarized the latest findings of digital technologies and AI use in the following areas of diabetes care, mainly including screening and risk predictions of diabetes and diabetic complications, precise monitoring and intervention combined with new technologies, and mobile health application in self-management support for people with diabetes. Challenges to promote further use of AI in diabetes care included data standardization and integration, performance of AI-based medical devices, motivation of patients, and sensitivity to privacy. In summary, although the AI applications in clinical practice is still at an early stage, we are moving toward a new paradigm for diabetes care with the rapid development and emerging application of AI.
Tunable localization of light using nested invisible metasurface cavities
Authors: Cuesta Francisco S. , Kosulnikov Sergei , Asadchy Viktar S. 
Published: February 2023

Abstract
An invisible cavity is an open resonant device that confines a localized field without producing any scattering outside of the device volume. By exploiting the scatter-less property of such device, it is possible to nest two invisible cavities, as the outer cavity would simply not notice the presence of the inner one, regardless of their relative position. As a result, the position of the inner cavity becomes a means to easily control the field localized inside the cavity and its quality factor. In this paper, we discuss the properties of nested invisible cavities as a simple method to achieve stronger localized fields and high tunable quality factor. Furthermore, we show that in optics, these cavities can be implemented using nanodisk-based dielectric metasurfaces that operate near their electric resonances.
Tunable on-chip mode converter enabled by inverse design
Authors: Zhou Hongyin , Liao Kun , Su Zhaoxian , Li Tianhao , Geng Guangzhou , Li Junjie , Wang Yongtian , Hu Xiaoyong , Huang Lingling 
Published: February 2023

AbstractTunable mode converter is a key component of channel switching and routing for optical communication system by adopting mode-division multiplexing. Traditional mode converter hardly implements high-order mode conversion and dynamic tunability simultaneously. In this study, we design a tunable mode converter filled with liquid crystal, which can convert fundamental mode into multiple high-order modes (TE0, TE1, and TE2) with a good performance and low intrinsic loss. For this multiple-objective task, we propose an inverse design framework based on the adjoint method. To experimentally prove our design, a tunable mode converter filled with air or water and a mode demultiplexer are fabricated to implement dynamic routing. The experimental results agree well with the simulation and reveal the crosstalk only around −7 dB. With its performance and efficiency, our proposed design flow can be a powerful tool for multifunction device design.
Crystal structure of ethyl 4-{[5-(adamantan-1-yl)-2-sulfanylidene-2,3-dihydro-1,3,4-oxadiazol-3-yl]methyl}piperazine-1-carboxylate, C20H30N4O3S
Authors: Al-Sanea Mohammad M. , Abdelbaky Mohammed S. M. , Garcia-Granda Santiago , Mohamed Ahmed A. B. , Tiekink Edward R. T. , El-Emam Ali A. 
Published: February 2023

Abstract
C20H30N4O3S, orthorhombic, P212121 (no. 19), a = 7.7152(3) Å, b = 10.6132(2) Å, c = 25.5990(7) Å, V = 2096.12(11) Å3, Z = 4, R
gt(F) = 0.0579, wR
ref(F
2) = 0.1216, T = 293 K.
The crystal structure of furan-2,5-diylbis((4-chlorophenyl)methanol), C18H14Cl2O3
Authors: Yang Yanliang , Li Yadi 
Published: February 2023

Abstract
C18H14Cl2O3, monoclinic, P21/n (no. 14), a = 10.3048(6) Å, b = 8.9620(5) Å, c = 18.0909(10) Å, β = 93.046(6)°, V = 1668.36(16) Å3, Z = 4, R
gt(F) = 0.0646, wR
ref(F
2) = 0.1616, T = 293 K.
A new optimal multistep optimal homotopy asymptotic method to solve nonlinear system of two biological species
Authors: Ayati Zainab , Pourjafar Sadegh 
Published: February 2023

Abstract
Recently solving integro-differential equations have been the focus of attention among many researchers in the field of mathematic and engineering. The aim of current study is to apply the well-known optimal homotopy asymptotic method (OHAM) on a specific and famous model of these equations. It is illustrated that auxiliary functions and the number of Taylor series terms affect the accuracy of the solution. Hence, at first a solution has been found with an acceptable error by OHAM. Then, it has been continued to attain a better solution by Multistep optimal homotopy asymptotic method. All these processes had improved the precision of the solution. Auxiliary polynomials of two, three, and four degrees and different numbers of Taylor series term have been investigated to solve a nonlinear system derived by two biological species ‎living together. Ultimately, appropriate results with auxiliary polynomials of degree four and Taylor series with six terms have been obtained precisely. In addition, the error values decrease significantly compared to the other cases.