bluuebunny/crossref_metadata_2025 huggingface dataset:
Inexact Iterates of Nonexpansive Mappings with Summable Errors in Metric Spaces with Graphs
Authors: Reich Simeon , Zaslavski Alexander J.
Published: October 2023

In our joint work with Dan Butnariu (2006) we established the stability of the convergence of iterates of a nonexpansive mapping on a complete metric space in the presence of summable computational errors. In a recent paper of ours, we extended this result to inexact iterates of nonexpansive mappings on complete metric spaces with graphs under a certain assumption on the iterates. In the present paper we obtain an analogous result by removing that assumption on the iterates and replacing it with an additional assumption on the graph.
Mitigation of Benzene-Induced Haematotoxicity in Sprague Dawley Rats through Plant-Extract-Loaded Silica Nanobeads
Authors: Rehan Touseef , Tahir Anum , Sultan Aneesa , Alabbosh Khulood Fahad , Waseem Shahid , Ul-Islam Mazhar , Khan Khalid Ali , Ibrahim Essam H. , Ullah Muhammad Wajid , Shah Nasrullah
Published: October 2023

Benzene, a potent carcinogen, is known to cause acute myeloid leukaemia. While chemotherapy is commonly used for cancer treatment, its side effects have prompted scientists to explore natural products that can mitigate the haematotoxic effects induced by chemicals. One area of interest is nano-theragnostics, which aims to enhance the therapeutic potential of natural products. This study aimed to enhance the effects of methanolic extracts from Ocimum basilicum, Rosemarinus officinalis, and Thymus vulgaris by loading them onto silica nanobeads (SNBs) for targeted delivery to mitigate the benzene-induced haematotoxic effects. The SNBs, 48 nm in diameter, were prepared using a chemical method and were then loaded with the plant extracts. The plant-extract-loaded SNBs were then coated with carboxymethyl cellulose (CMC). The modified SNBs were characterized using various techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), UV–visible spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. The developed plant-extract-loaded and CMC-modified SNBs were administered intravenously to benzene-exposed rats, and haematological and histopathological profiling was conducted. Rats exposed to benzene showed increased liver and spleen weight, which was mitigated by the plant-extract-loaded SNBs. The differential white blood cell (WBC) count was higher in rats with benzene-induced haematotoxicity, but this count decreased significantly in rats treated with plant-extract-loaded SNBs. Additionally, blast cells observed in benzene-exposed rats were not found in rats treated with plant-extract-loaded SNBs. The SNBs facilitated targeted drug delivery of the three selected medicinal herbs at low doses. These results suggest that SNBs have promising potential as targeted drug delivery agents to mitigate haematotoxic effects induced by benzene in rats.
Advancing ESG and SDGs Goal 11: Enhanced YOLOv7-Based UAV Detection for Sustainable Transportation in Cities and Communities
Authors: Chung Ming-An , Wang Tze-Hsun , Lin Chia-Wei
Published: October 2023

Environmental, social, and governance issues have gained significant prominence recently, particularly with a growing emphasis on environmental protection. In the realm of heightened environmental concerns, unmanned aerial vehicles have emerged as pivotal assets in addressing transportation challenges with a sustainable perspective. This study focuses on enhancing unmanned aerial vehicles’ object detection proficiency within the realm of sustainable transportation. The proposed method refines the YOLOv7 E-ELAN model, tailored explicitly for traffic scenarios. Leveraging strides in deep learning and computer vision, the adapted model demonstrates enhancements in mean average precision, outperforming the original on the VisDrone2019 dataset. This approach, encompassing model component enhancements and refined loss functions, establishes an efficacious strategy for precise unmanned aerial vehicles object detection. This endeavor aligns seamlessly with environmental, social, and governance principles. Moreover, it contributes to the 11th Sustainable Development Goal by fostering secure urban spaces. As unmanned aerial vehicles have become integral to public safety and surveillance, enhancing detection algorithms cultivates safer environments for residents. Sustainable transport encompasses curbing traffic congestion and optimizing transportation systems, where unmanned aerial vehicle-based detection plays a pivotal role in managing traffic flow, thereby supporting extended Sustainable Development Goal 11 objectives. The efficient utilization of unmanned aerial vehicles in public transit significantly aids in reducing carbon footprints, corresponding to the “Environmental Sustainability” facet of Environmental, Social, and Governance principles.
Urban Renewals: Learning from a Country’s Recent Experience for Enhancing Socially-Sustainable Global Planning Policy
Authors: Bigon Liora , Langenthal Edna
Published: October 2023

Against the background of urban redevelopment programs through the lens of varied, country-related planning cultures, this article sets the stage for learning from one country’s recent experience. In this article, we focus on two Israeli urban regeneration programs operating since 2000: the ‘Integrated National Planning Scheme’ (TAMA 38) and ‘Evacuate and Build’ (Pinuy Binuy) programs. This article aims to examine the governmental agenda behind these programs in comparison to previous urban regeneration programs and, especially, to critically review the implementation and implication of these programs considering social sustainability issues. Methodologically, the policies and practices of this recent wave of urban renewals in Israel are revisited through a critical reading of a series of studies from the last five years, bringing together multidimensional societal aspects. In terms of ethics and qualitative dimensions, the examined societal aspects are rooted in social sustainability theory and contemporary urban policy design. Our findings regarding this country-related recent experience in urban renewals have identified several gaps concerning certain aspects of social sustainability theory and practice. These gaps call for a better understanding by Israel’s urban policy makers of the comprehensive essence of contemporary social sustainability theory, which should also be mirrored in the respective professional discourse. The gaps are also useful in informing our accumulating transnational knowledge and experience in urban renewal schemes, based on a chain of country-related experiences and planning cultures.
Factors Associated with Late Diagnosis of Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome (HIV/AIDS) in a University Hospital in Brazil: Challenges to Achieving the 2030 Target
Authors: Arantes Ligia Maria Nascimento , Pedroso Andrey Oeiras , Menegueti Mayra Gonçalves , Gir Elucir , Botelho Eliã Pinheiro , Silva Ana Cristina de Oliveira e , Reis Renata Karina
Published: October 2023

Introduction: This study aimed to identify factors associated with late diagnosis and clinically monitor newly diagnosed HIV/AIDS patients. Method: Retrospective study, based on secondary data from a specialized unit at the Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto of the University of Sao Paulo. Data collection included sociodemographic, behavioral, clinical, and laboratory data of newly diagnosed HIV patients between 2015 and 2019. Data analysis was undertaken using inferential statistical tests. Results: A total of 314 individuals were newly diagnosed with HIV/AIDS, 86.6% (272) had a late diagnosis and 53.8% (169) were diagnosed very late. Using the adjusted odds ratio, we observed that bisexual and MSM patients were less likely to have a late diagnosis compared to straight patients. Individuals who entered through the emergency department and Outpatient Clinic had a lower chance of having a very late diagnosis compared to those diagnosed in the ward/inpatient unit. Having a higher education and university education were protective factors against having a very late diagnosis of HIV infection compared to elementary school education only. In addition, male patients were more likely to have a very late diagnosis compared to female patients. Conclusions: This study evidenced a high prevalence of late and very late diagnoses. Therefore, attention should be directed towards factors related to late and very late presentation.
Long-Term Follow-Up of COVID-19 Convalescents—Immune Response Associated with Reinfection Rate and Symptoms
Authors: Seller Anna , Hackenbruch Christopher , Walz Juliane S. , Nelde Annika , Heitmann Jonas S.
Published: October 2023

SARS-CoV-2 has spread worldwide, causing millions of deaths and leaving a significant proportion of people with long-term sequelae of COVID-19 (“post-COVID syndrome”). Whereas the precise mechanism of post-COVID syndrome is still unknown, the immune response after the first infection may play a role. Here, we performed a long-term follow-up analysis of 110 COVID-19 convalescents, analyzing the first SARS-CoV-2-directed immune response, vaccination status, long-term symptoms (approximately 2.5 years after first infection), and reinfections. A total of 96% of convalescents were vaccinated at least once against SARS-CoV-2 after their first infection. A reinfection rate of 47% was observed, and lower levels of anti-spike IgG antibodies after the first infection were shown to associate with reinfection. While T-cell responses could not be clearly associated with persistent postinfectious symptoms, convalescents with long-term symptoms showed elevated SARS-CoV-2-specific antibody levels at the first infection. Evaluating the immune response after the first infection might be a useful tool for identifying individuals with increased risk for re-infections and long-term symptoms.
A NitroPure Nitrocellulose Membrane-Based Grapevine Virus Sampling Kit: Development and Deployment to Survey Japanese Vineyards and Nurseries
Authors: Nita Mizuho , Jones Taylor , McHenry Diana , Bush Elizabeth , Oliver Charlotte , Kawaguchi Akira , Nita Akiko , Katori Miyuki
Published: October 2023

We developed a NitroPure Nitrocellulose (NPN) membrane-based method for sampling and storing grapevine sap for grapevine virus detection. We devised an efficient nucleic acid extraction method for the NPN membrane, resulting in 100% amplification success for grapevine leafroll-associated virus 2 (GLRaV2) and 3 (GLRaV3), grapevine rupestris stem pitting-associated virus (GRSPaV), grapevine virus A, grapevine virus B, and grapevine red blotch virus (GRBV). This method also allowed the storage of recoverable nucleic acid for 18 months at room temperature. We created a sampling kit to survey GLRaV2, GLRaV3, and GRBV in Japanese vineyards. We tested the kits in the field in 2018 and then conducted mail-in surveys in 2020–2021. The results showed a substantial prevalence of GLRaV3, with 48.5% of 132 sampled vines being positive. On the other hand, only 3% of samples tested positive for GLRaV2 and none for GRBV.
Comparative Cost-Effectiveness Analysis of Respiratory Syncytial Virus Vaccines for Older Adults in Hong Kong
Authors: Wang Yingcheng , Fekadu Ginenus , You Joyce H. S.
Published: October 2023

Two respiratory syncytial virus (RSV) vaccines (AREXVY® and ABRYSVO®) were recently approved for older adults in the US. This study aimed to evaluate the cost-effectiveness of AREXVY® and ABRYSVO® from the Hong Kong public healthcare provider’s perspective. A two-year decision-analytical model was developed to examine the outcomes of a single RSV vaccination (AREXVY® or ABRYSVO®) compared to no vaccination. Primary outcomes included RSV-related health outcomes, direct medical costs, quality-adjusted life-year (QALY) loss, and incremental cost per QALY (ICER). RSV vaccines are not yet marketed in Hong Kong, base-case analysis, therefore, benchmarked US RSV vaccine prices at 4 levels (25%, 50%, 75%, 100%). AREXVY® and ABRYSVO® (versus no vaccination) gained 0.000568 QALY and 0.000647 QALY, respectively. ICERs of ABRYSVO® (26,209 USD/QALY) and AREXVY® (47,485 USD/QALY) were lower than the willingness-to-pay threshold (49,594 USD/QALY) at 25% US vaccine price. The RSV attack rate was a common influential factor at all vaccine price levels. The probabilities of AREXVY® and ABRYSVO® to be most cost-effective were 0.10% and 97.68%, respectively, at 25% US vaccine price. Single vaccination of ABRYSVO® or AREXVY® for older adults appears to gain QALYs over 2 years in Hong Kong. The cost-effectiveness of AREXVY® and ABRYSVO® is subject to vaccine price and RSV attack rate.
Attenuating RNA Viruses with Expanded Genetic Codes to Evoke Adjustable Immune Response in PylRS-tRNACUAPyl Transgenic Mice
Authors: Zheng Zhetao , Wu Xuesheng , Wang Yu , Yang Xu , Chen Hongmin , Shen Yuxuan , Yang Yuelin , Xia Qing
Published: October 2023

Ribonucleic acid (RNA) viruses pose heavy burdens on public-health systems. Synthetic biology holds great potential for artificially controlling their replication, a strategy that could be used to attenuate infectious viruses but is still in the exploratory stage. Herein, we used the genetic-code expansion technique to convert Enterovirus 71 (EV71), a prototypical RNA virus, into a controllable EV71 strain carrying the unnatural amino acid (UAA) Nε-2-azidoethyloxycarbonyl-L-lysine (NAEK), which we termed an EV71-NAEK virus. After NAEK supplementation, EV71-NAEK could recapitulate an authentic NAEK time- and dose-dependent infection in vitro, which could serve as a novel method to manipulate virulent viruses in conventional laboratories. We further validated the prophylactic effect of EV71-NAEK in two mouse models. In susceptible parent mice, vaccination with EV71-NAEK elicited a strong immune response and protected their neonatal offspring from lethal challenges similar to that of commercial vaccines. Meanwhile, in transgenic mice harboring a PylRS-tRNACUAPyl pair, substantial elements of genetic-code expansion technology, EV71-NAEK evoked an adjustable neutralizing-antibody response in a strictly external NAEK dose-dependent manner. These findings suggested that EV71-NAEK could be the basis of a feasible immunization program for populations with different levels of immunity. Moreover, we expanded the strategy to generate controllable coxsackieviruses for conceptual verification. In combination, these results could underlie a competent strategy for attenuating viruses and priming the immune system via artificial control, which might be a promising direction for the development of amenable vaccine candidates and be broadly applied to other RNA viruses.
Pregnancy Complications and Feto-Maternal Monitoring in Rabbits
Authors: Pinto-Pinho Patrícia , Pinto Maria de Lurdes , Monteiro José , Fardilha Margarida , Pinto-Leite Rosário , Colaço Bruno
Published: October 2023

Rabbit production holds significant relevance in modern agriculture due to its potential as a sustainable source of high-quality protein and efficient feed conversion, contributing to food security and economic diversification. Nevertheless, studies incorporating feto-maternal monitoring in this species are uncommon. This review gathers research on the monitoring and evaluation of factors affecting rabbit gestation, providing a better understanding of the causes of prenatal development abnormalities. These include studies regarding how chronic maternal hypertension, gestational diabetes, maternal stress, ectopic gestation, maternal uterine ischemia and fetal hypoxia, intrauterine growth restriction, superfetation, maternal age, maternal nutritional status, maternal physical condition, maternal and embryonic genotype, and the intrauterine location of rabbit fetuses can potentially impact rabbits’ reproduction and maternal and fetal health. Among other monitoring techniques, ultrasonography, considered one of the best tools for diagnosing pregnancy and conducting follow-up, is also reviewed. Details on measurable fetal-development parameters in rabbits and precautions to be considered before and during the examination are also provided. Additional studies are required to understand why some events occur and their consequences throughout gestation, allowing the determination of new biomarkers or cut-offs that can be helpful for early diagnosis and improve reproductive efficiency.
Physical Model Tests of Concrete Buttress Dams with Failure Imposed by Hydrostatic Water Pressure
Authors: Enzell Jonas , Nordström Erik , Sjölander Andreas , Ansell Anders , Malm Richard
Published: October 2023

Although the failure of a concrete dam is a complex and highly dynamic process, the current safety assessments of concrete gravity and buttress dams rely on a simplified 2D stability analysis, which neglects the load redistribution due to 3D monolith interactions and the valley shape. In addition, the estimation of breach parameters in concrete dams is based on assumptions rather than analyses, and better prediction methods are needed. Model tests have been conducted to increase the understanding of the failure behavior of concrete dams. A scale model buttress dam, with a scale of 1:15, consisting of 5 monoliths that were 1.2 m in height and 4 m in width, was constructed and loaded to failure using water pressure. The model dam had detachable abutment supports and shear keys to permit variations in the 3D behavior. The results showed that the shear transfer was large between the monoliths and that the failure of a single dam monolith is unlikely. A greater lateral restraint gives not only a higher failure load but also a better indication of impending failure. These findings suggest that the entire dam, including its boundary conditions, should be considered during a stability assessment. The results also suggest that the common assumption in dam safety codes that a single monolith fails during flooding analysis is not conservative. The dataset obtained provides a foundation for the future development of dam-monitoring alarm limits and for predictive models of dam-breaching processes.
Identification of the Sediment Movement Mechanism via Grain Size and Shape: A Case Study of a Beach in Eastern Hainan Island in South China
Authors: Cheng Wufeng , Chen Shenliang , Zhu Jun , Zhong Xiaojing , Hu Jin , Guo Junli
Published: October 2023

This paper used dynamic image analysis (DIA) to analyze the grain size and shape data of beach surface sediments in Bao’ding Bay, eastern Hainan Island, China, and explored the effects of sediment transport modes and beach morphology on the grain size–shape trend curves. This paper adopted a method of combining grain size cumulative frequency curves and grain size–shape trend curves to identify three sediment transport modes: suspension, saltation, and traction, and analyzed the characteristics of the grain size–shape trend curves under different beach morphologies (reflective, intermediate, and dissipative). This paper found that the grain size–shape trend curves can effectively indicate the sediment transport modes and improve the accuracy of subpopulation division; the grain size–shape trend curves showed different distribution characteristics in the cross-shore and longshore directions, which are closely related to the beach’s morphology and sediment transport direction. This paper provides a new method and idea for studying beach sediment transport and sedimentary environment using sediment grain size and shape data.
Century-Scale Environmental Evolution of a Typical Subtropical Reservoir in the Guangdong–Hong Kong–Macao Greater Bay Area
Authors: Li Yuke , Li Yan , Yang Hanfei , Hong Quan , Huang Guoyao , Kattel Giri
Published: October 2023

As one of the world’s four Greater Bay Areas, the Guangdong–Hong Kong–Macao Greater Bay Area (GBA) faces many environmental challenges along with rapid economic development, causing significant degradation of aquatic ecosystems. However, there is limited knowledge on long-term environmental changes (i.e., >50 years), and restoration of the degraded aquatic ecosystems in the GBA has become increasingly difficult. This study selects a typical inland water body, the Miaotan Reservoir, from Huizhou City in the GBA, to explore long-term changes in water and the eco-environment over the past 70 years and to provide some restoration and management strategies for degrading aquatic ecosystems in the region. We collected a sediment core from the reservoir center and established an age–depth profile by integrating 210Pb and 137Cs dating. We then set up high-resolution diatom community succession stratigraphy and multiple indicators (grain size, element, geochemical and social indicators) as responses to environmental changes in the reservoir. Our results show that significant changes have occurred in the ecosystem and environment of the Miaotan Reservoir and its catchment over the past 70 years. The diatom community underwent a gradual transition from absolute dominance of the mesotrophic species Aulacoseira granulata to dominance of the eutrophic species Nicizschia gracilis, Nicizschia palea and Achanathes sp., indicating the onset of water quality degradation and ecosystem changes in the 1990s due to eutrophication. The RDA (Redundancy analysis) results demonstrate that exogenous pollutant inputs into the Miaotan Reservoir resulting from agricultural activities over the period led to serious environmental changes, e.g., toxic algal bloom and heavy metal pollution. This study enriches our understanding of long-term environmental changes in inland lakes and reservoirs in South China and provides insights into the restoration and management of aquatic ecosystems in the GBA.
Spatial Distribution of Trace Elements in Sub-Surficial Marine Sediments: New Insights from Bay I of the Mar Piccolo of Taranto (Southern Italy)
Authors: Marsico Antonella , Rizzo Angela , Capolongo Domenico , De Giosa Francesco , Di Leo Antonella , Lisco Stefania , Mastronuzzi Giuseppe , Moretti Massimo , Scardino Giovanni , Scicchitano Giovanni
Published: October 2023

Contaminated marine and coastal sediments represent the main source of secondary pollution for the aquatic environment and marine fauna, affecting, directly and indirectly, ecosystems and human health. The assessment of the distribution of chemical pollutants in marine sediments can therefore be considered a preliminary step for understanding the possible circulation of pollutants in the marine environment and planning any targeted and efficient reclamation activity. This study provides new insights on the environmental status of Bay I of Mar Piccolo basin (Southern Italy) by proposing an integrated investigation approach to define the distribution of trace metals and evaluate the thickness of the sediments potentially affected by pollution. To this aim, the concentrations of As, Cd, Cr, Cu, Hg, Ni, Pb, Sn, and Zn are estimated for sediment samples collected from 19 cores, and specific environmental indices are calculated. Due to its remarkable environmental and economic relevance, the area of Taranto has been selected as a case study to evaluate the effectiveness of the proposed method in supporting the identification of hotspot areas for which priority remediation activities are needed.
Epstein-Barr virus infection: from awareness of medical staff to the organization of epidemic control measures
Authors:   Vega-M, Moscow region, Sergiev Posad, Kulikova M. M. , Nikitina G. Yu. ,   S. P. Botkin City Clinical Hospital, Moscow Healthcare Department, Moscow, Russia, Solomay T. V. ,   Central Research Institute of Epidemiology of Rospotrebnadzor, Moscow, Russia; I. I. Mechnikov Scientific Research Institute of Vaccines and Serums» of the Ministry of Education and Science of Russia, Moscow, Russia, Zhukova E. V. ,   I. V. Davydovsky City Clinical Hospital, Moscow Healthcare Department, Moscow, Russia, Semenenko A. V. ,   N. F. Gamaleya National Research Center for Epidemiology and Microbiology of the Ministry of Health of the Russian Federation, Moscow, Russia, Gotvyanskaya T. P. ,   N. F. Gamaleya National Research Center for Epidemiology and Microbiology of the Ministry of Health of the Russian Federation, Moscow, Russia
Published: October 2023

The actuality of the infection caused by the Epstein — Barr virus (EBV) is due to its ubiquitous spread, the increase in morbidity, the chronic course of the infectious process, the high risk of the pathogen spread in organized groups of children and adults. A leading role in the timely identification and isolation of patients from medical organizations plays the awareness of medical workers on the issues of epidemiology, clinic and diagnosis of EBV infection. In order to assess the awareness of medical workers on these issues, a survey was conducted of 1,023 employees of various medical organizations in Moscow, including 514 doctors of therapeutic departments of hospitals, 342 otorhinolaryngologists, 167 dentists and assistants dentists. The conducted study revealed low awareness of medical personnel on all questions of the questionnaire, which creates a risk of nosocomial spread of the pathogen and requires an in-depth study of the epidemic process of EBV infection in the conditions of medical care for the subsequent development of a set of preventive and epidemic-control measures.
Hygienic study of attention and memory of students
Authors:   Federal State Budgetary Educational Institution of Higher Education «Omsk State Medical University» of the Russian Federation Ministry of Health, Omsk, Russia, Gudinova Zh. V. , Vaskovskaya Yu. S. ,   Federal State Budgetary Educational Institution of Higher Education «Omsk State Medical University» of the Russian Federation Ministry of Health, Omsk, Russia, Zhernakovа G. N. ,   Federal State Budgetary Educational Institution of Higher Education «Omsk State Medical University» of the Russian Federation Ministry of Health, Omsk, Russia
Published: October 2023

The article presents the results of a study of some characteristics of memory and attention of 140 thirdyear students of the medical, pediatric and dental faculties of Omsk State Medical University, conducted at the beginning of hygiene classes according to the curriculum. In comparison with the norms from literary sources, the best result was noted in terms of the volume of figurative memory (99.3 % of positive results among the subjects) and attention switching (90.8 %). 2/3 of the students demonstrated good short-term and long-term memory. Half of the students (51.4 %) coped with the task of assessing the distribution of attention. Reference intervals for the indicator of attention switching T (Schulte tables), an indicator of the distribution of attention and semantic memory, were proposed, which are absent in the available literature. The worst indicators of switching attention in girls at 8:00 am compared to those in boys and girls in the daytime were established, which probably indicates a higher sensitivity of the female body to lack of sleep. A significant influence on the verbal-logical memory of the factor of the day of the school week was established (the worst indicators were on Monday and Friday, the best were in the middle of the week and on Saturday), as well as the effect of testing time on figurative and long-term memory (the best indicators were noted at 13:00). In connection with the foregoing, it is recommended to conduct memory and attention studies in the middle of the day, excluding the early morning hours, especially for girls, and also to regulate the start of classes at the university no earlier than 8:30, especially in large cities.
On Soardi's Bernstein operators of second kind
Authors: Raşa Ioan
Published: October 2023

We solve a problem, raised by Paolo Soardi, concerning the shape preserving properties of the Bernstein operators of second kind. We establish also a Voronovskaja-type formula for these operators.
On accelerating the convergence of the successive approximations method
Authors: Cătinaş Emil
Published: October 2023

In a previous paper of us, we have shown that no q-superlinear convergence to a fixed point \(x^\ast\) of a nonlinear mapping \(G\) may be attained by the successive approximations when \(G^\prime(x^\ast)\) has no eigenvalue equal to 0. However, high convergence orders may be attained if one considers perturbed successive approximations.We characterize the correction terms which must be added at each step in order to obtain convergence with q-order 2 of the resulted iterates.
A Voronovskaya-type theorem
Authors: Ivan Mircea , Raşa Ioan
Published: October 2023

We give an asymptotic estimation for some sequences of divided differences. We use this estimation to obtain a Voronovskaya-type formula involving linear positive operators.
The Crest factor for trigonometric polynomials. Part I: Approximation theoretical estimates
Authors: Jetter K. , Pfander G. , Zimmermann G.
Published: October 2023

The Chebyshev norm of a degree n trigonometric polynomial is estimated against a discrete maximum norm based on equidistant sampling points where, typically, oversampling rather than critical sampling is used.

The bounds are derived from various methods known from classical Approximation Theory.

These estimates are of fundamental importance for the design of efficient OFDM in communication systems.
On the arclength of trigonometric interpolants
Authors: Prestin Jürgen , Quak Ewald
Published: October 2023

As pointed out recently by Strichartz [5], the arclength of the graph \(\Gamma(S_N(f))\) of the partial sums \(S_N(f)\) of the Fourier series of a jump function \(f\) grows with the order of \(\log N\).In this paper we discuss the behaviour of the arclengths of the graphs of trigonometric interpolants to a jump function. Here the boundedness of the arclengths depends essentially on the fact whether the jump discontinuity is at an interpolation point or not.

In addition convergence results for the arclengths of interpolants to smoother functions are presented.
Phelps type duality results in best approximation
Authors: Cobzaş Ştefan
Published: October 2023

The aim of the present paper is to show that many Phelps type

duality result, relating the extension properties of various

classes of functions (continuous, linear continuous, bounded

bilinear, Hölder-Lipschitz) with the approximation properties

of some annihilating spaces, can be derived in a unitary and

simple way from a formula for the distance to the kernel of a

linear operator, extending the well-known distance formula to

hyperplanes in normed spaces. The case of spaces \(c_0\) and

\(l^\infty\) is treated in details.
The combined Shepard-Abel-Goncharov univariate operator
Authors: Cătinaş Teodora
Published: October 2023

We extend the Shepard operator by combining it with the Abel-Goncharov univariate operator in order to increase the degree of exactness and to use some specific functionals. We study this combined operator and give some of its properties. We introduce the corresponding interpolation formula and study its remainder term.
Aitken-Steffensen type methods for nonsmooth functions (III)
Authors: Păvăloiu Ion
Published: October 2023

We provide sufficient conditions for the convergence of the Steffensen method for solving the scalar equation \(f(x)=0\), without assuming differentiability of \(f\) at other points than the solution \(x^\ast\). We analyze the cases when the Steffensen method generates two sequences which approximate bilaterally the solution.
An Ostrowski type inequality for double integrals in terms of \(L_p\)-norms and applications in numerical integration
Authors: Dragomir S.S. , Barnett N.S. , Cerone P.
Published: October 2023

An inequality of the Ostrowski type for double integrals and applications in Numerical Analysis in connection with cubature formulae are given.
On the uniqueness of extension and unique best approximation in the dual of an asymmetric normed linear space
Authors: Mustăţa Costică
Published: October 2023

A well known result of R. R. Phelps (1960) asserts that in order that every linear continuous functional, defined on a subspace \(Y\) of a real normed space \(X\), have a unique norm preserving extension it is necessary and sufficient that its annihilator \(Y^\bot\) be a Chebyshevian subspace of \(X^\ast\). The aim of this note is to show that this result holds also in the case of spaces with asymmetric norm.
On the modified beta approximating operators of first kind
Authors: Miheşan Vasile
Published: October 2023

We define a general linear operator from which we obtain as special case the modified beta first kind operator\[(B_{p,q}f)(x)={B(p,q)}\int_0^1 t^{p-1}(1-t)^{q-1}f\left({B(p,q)}{B(p+a,q)}t^a x\right){\rm d}t.\]We consider here only the cases \(a=1\) and \(a=-1\).We obtain several positive linear operators as particular cases of this modified beta first kind operator.
About a general property for a class of linear positive operators and applications
Authors: Pop Ovidiu T.
Published: October 2023

In this paper we demonstrate a general property for a class of linear positive operators. By particularization, we obtain the convergence and the evaluation for the rate of convergence in term of the first modulus of smoothness for the Bernstein operators, Durrmeyer operators, Kantorovich operators and Bleimann, Butzer and Hahn operators.
Refinement of some inequalities for means
Authors: Anisiu Mira-Cristiana , Anisiu Valeriu
Published: October 2023

We consider weighted arithmetic means as, for example, \(\alpha G+(1-\alpha)C,\) with \(\alpha\in(0,1)\), \(G\) \(C\) being the geometric and anti-harmonic means, and we find the range of values of \(\alpha\) for which the weighted mean is still greater or less than some suitable means, in this case the arithmetic and Hölder ones.
On a Steffensen-Hermite type method for approximating the solutions of nonlinear equations
Authors: Păvăloiu Ion
Published: October 2023

It is well known that the Steffensen and Aitken-Steffensen type methods are obtained from the chord method, using controlled nodes. The chord method is an interpolatory method, with two distinct nodes. Using this remark, the Steffensen and Aitken-Steffensen methods have been generalized using interpolatory methods obtained from the inverse interpolation polynomial of Lagrange or Hermite type. In this paper we study the convergence and efficiency of some Steffensen type methods which are obtained from the inverse interpolatory polynomial of Hermite type with two controlled nodes.
Iterated boolean sums of Bernstein and related operators
Authors: Raşa Ioan
Published: October 2023

Let \((T(t))_{t\geq0}\) be the semigroup associated with the classical Bernstein operators \((B_{n})_{n\geq1}\) on \(C[0,1]\). We obtain rates of convergence for iterated boolean sums of the operators \(T\left( \frac{1}{n}\right) .\)
Conjugate heat transfer in a vertical channel filled with a nanofluid adjacent to a heat generating solid domain
Authors: Pătrulescu Flavius , Groşan Teodor
Published: October 2023

The effect of thermal dispersion in the conjugate steady free convection flow of a nanofluid in a vertical channel is investigated numerically using a single phase model. Considering the laminar and fully developed flow regime, a simplified mathematical model is obtained. In the particular cases when solid phase and thermal dispersion effects are neglected the problem was solved analytically. The numerical solution is shown to be in excellent agreement with the close form analytical solution. Nusselt number enhancement with the Grashof number, volume fraction, aspect ratio parameter and thermal diffusivity constant increasing has been found.
Induction of Co-existing Items Available in Distributed Version Control Systems for Software Development
Authors: Özyer Sibel
Published: October 2023

Software development in Open-Source Software systems (OSS) allow developers to share their code and modify other developers' code. That leads to collaboration in the development. They can either discuss on the items to be developed, including the errors and technical problems that were faced. One popular OSS platform is github which already has a large number of developers and projects. The data residing in the issues part of github is sufficiently large, complex and unstructured. It could be processed to find novel discoveries. This work concentrates on one selected project to be analyzed systematically. Routine Extract, Transform and Load (ETL) steps have been identified to clean the data before applying natural language processing for prioritizing and taking actions for the requirements. In a collaborative environment. Our work uses terms and guides developers for tracking the co-occurrence of the terms used together to help them focus on the important issues.
An Effective Reference-Point-Set (RPS) Based Bi-Directional Frequent Itemset Generation
Authors: Balaram Ambily , Raju Nedunchezhian
Published: October 2023

Data Mining (DM) is a combination of several fields that effectively extracts hidden patterns from vast amounts of historical data. One of the DM activities used to produce association rules is Association Rule Mining (ARM). To significantly reduce time and space complexities, the proposed method utilizes an effective bi-directional frequent itemset generation approach. The dataset is explicitly bifurcated into dense and sparse regions in the process of mining frequent itemset. One more feature is proposed in this paper which sensibly predetermines a candidate subset called, Reference-Points-Set (RPS), to reduce the complexities associated with mining of frequent itemsets. The RPS helps to reduce the number of scans over the actual dataset. The novelty is to look at possible candidates during the initial database scans, which can cut down on the number of additional database scans that are required. According to experimental data, the average scan count of the proposed method is respectively, 24% and 65%, lower than that of Dynamic Itemset Counting (DIC) and M-Apriori, across different support counts. The proposed method typically results in a 10% reduction in execution time over DIC and is three times more efficient than M-Apriori. These results significantly outperform those of their predecessors, which strongly supports the proposed approach when creating frequent itemsets from large datasets
From research to prototypes: Developing a digital game to foster fraction equivalence.
Authors: Thoma Georgios , Bahnmueller Julia , Ninaus Manuel , Moeller Korbinian
Published: October 2023

Fraction understanding is a significant predictor of future math achievement. In addition to more traditional instruction, digital game-based approaches have been found successful in facilitating conceptual understanding of fractions (including aspects such as part-whole relations represented as pie-charts, or measurement, i.e., magnitude in terms of number lines). Nevertheless, the number of existing games that address the aspect of fraction equivalence is limited and if so, these typically replicate common paper-and-pencil tasks like identifying and matching equivalent fractions. This, however, hardly takes advantage of the medium’s potential and affordances nor strives for intrinsic integration of the learning content with game mechanics. Seeking to overcome this shortcoming, the present article describes the development of a digital game fostering fraction equivalence. To do so, among others, we developed visual animations illustrating the transitions from circular part-whole representations (pie-charts) to magnitudes on a number line—drawing on previous research and games. In particular, a wheel is presented, whose circumference matches the length of the number line which it rolls along. Players can manipulate the number of spikes on the wheel reflecting the number of parts of the whole (e.g., 2 spikes halve the circle, while 4 cut it into quarters etc.). By rolling the wheel, the spikes puncture the number line thus segmenting it into equal parts, essentially transforming the aspects from part-whole relations to measurement (magnitude) on the number line. Additionally, as punctures of 2 and 4 spikes will coincide at the 1/2 - 2/4 location of a 0-1 number line, players can find equivalent fractions. The game under development will be evaluated with late primary/early secondary school students to test its game design, affordances, and possible impact on fraction understanding.
الغاية الارهابية
Authors: عبد سيف , عبدالله فراس
Published: October 2023

غاية السلوك الانساني هي العنصر النفسي الذي لايقل اهمية عن عناصر الركن النفسي الاخرى، واهميتها في تكوين السلوك الانساني وعلى الرغم من تلك الاهمية الى انها لم تحظ باهتمام رجال الفقه والقضاء ولاحتى التشريع الجنائي وغالباً ما كان يخلط بين مفهوم الغاية والمفاهيم النفسية الاخرى القريبة منها. طرح موضوع الغاية جاء نظراً لاهمية عنصر الغاية في السلوك الاجرامي،الجريمة الارهابية كاحد انواع او صور ذلك السلوك تتمتع بخصوصية تميزها عن بقية الجرائم حيثيبدو دور الغاية الجنائية فيها واضحاً ويعطي للجريمة الارهابية العنصر المميز لها في ركنها المعنوي، المشرع العراقي في قانون مكافحة الارهاب رقم 13 لسنة 2005 نص صراحة على الغاية الارهابية لكن لم يوضح او يحدد معنى الغاية للاجتهاد القضاء الذي غالباً ماكان يخلط بين الغاية و الباعث ايضاً، فكانت الاشكالية التي تمحورت دراستنا حولها في هذا الموضوع،البحث عن ماهية الغاية و الغاية الارهابية على وجه الخصوص، ومن خلال بيان معنى الغاية في الاصطلاح الفقه والقانون ووضع تعريفاً خاصاً بالغاية الجنائية كون ان الفقه الجنائي لم يتناول موضوع تعريف الغاية الجنائية تعريفاً واضحاً دقيقاً، بعد الاشارة الى نقطة مهمة هي ان الغاية الجنائية هي غاية غير اخلاقية (جرمية).
تكريس مبدأ التراث المشترك للإنسانية في إطار القانون الدولي
Authors: عيسى ميامي , جعفر محمود
Published: October 2023

بدأ المجتمع الدولي يدرك على إثر اكتشاف الثروات الهائلة في المناطق التي تقع خارج حدود السيادة الإقليمية للدول، بأن الفارق الهائل في التطور العلمي والتكنولوجي بين الدول المتقدمة والدول النامية، قد يمنح للدول المتقدمة فرصة استغلال هذه الثروات، وهذا ما سيؤدي بدوره إلى اتساع الفجوة بين الدول المتقدمة والدول النامية، وترسيخ مبدأ عدم المساواة بسبب عدم امتلاك دول العالم الثالث الامكانيات التي تتيح لها المشاركة في استغلال تلك الثروات، وعندما برزت هذه المخاوف إلى الواجهة في الجمعية العامة للأمم المتحدة عام 1967، طالب السفير أرفيد باردو مندوب دولة مالطا الدائم في الأمم المتحدة في 17 آب 1967 أن يدرج في جدول أعمال (د-22) للجمعية العامة للأمم المتحدة اقتراحاً لدراسة مسألة تخصيص قاع البحار والمحيطات وباطن أرضها خارج حدود الولاية الإقليمية للدول للأغراض السلمية وحدها، واستخدام مواردها لمصلحة البشرية، حيث نال هذا الاقتراح موافقة من قبل الجمعية العامة للأمم المتحدة، وتم اتخاذ عدة خطوات قانونية لوضعها موضع التنفيذ.
الحماية المعيارية للجينوم البشري
Authors: مطير مهدي , عبدالامير حسام
Published: October 2023

الحماية القانونية للجينوم البشري هي قضية أخلاقية تتعلق بمستقبل الوجود البشري. بعد الكشف عن الخريطة الجينية البشرية، ازدادت الممارسات العلمية والبحوث المتعلقة بالجينوم البشري، وخاصة التطبيقات السلبية للهندسة الوراثية التي تنتهك حقوق الإنسان الأساسية، لا سيما الحق في كرامة الإنسان، وتشكل تحديات حقيقية لوجود وتنوع أجيال الحاضر والمستقبل.  لذلك ، فإن وجود قواعد قانونية على المستويين الوطني والدولي ضرورة مطلقة لحظر هذه التهديدات وترتيب المسؤولية المدنية والجنائية لمن ينتهكها.
صور واساليب اخلال الإدارة بواجب تنفيذ احكام القضاء الإداري
Authors: نجم جنان , قدوري تغريد
Published: October 2023

تعد الصور والاساليب التي تتبعها الإدارة في سبيل الاخلال بتنفيذ الاحكام الإدارية من اخطر التصرفات التي تنتهجها الإدارة تهربا من الزام تنفيذها يساعدها في ذلك عدم إمكانية حصر هذه الصور التي تتنوع وتزداد باستمرار مع تطور العلاقات الوظيفية في الميدان الإداري مما يصعب معه وجود تقنين قانوني لهذه الصور واساليب مواجهتها وعلم الإدارة بذلك وسعيها لتحقيق مبتغاها في عدم التنفيذ مع ما تمتلكه من إمكانيات فائقة وسلطات واسعة لتجعل من هذه الصور تصرفات قانونية يعجز القضاء على مواجهتها فيشكل تصرفها هذا خطر كبيرا على حقوق الافراد في المجتمع واخلال بضماناتهم وهذا مما يستلزم من المشرع تقنين هذه الصور مع ما تحتمل من حدوث تغيرات فيها بنص قانوني وان يلتفت القضاء الى التركيز على هذه الصور والأساليب التي تتبعها الإدارة ضمانا لحقوق الافراد التي ضمنتها النصوص الدستورية في مختلف دول العالم.
Arrhythmic variant of post-covid myocarditis: spectrum of rhythm and conduction disorders, treatment approaches
Authors: Savina P. O. , Blagova O. V. , Ainetdinova D. Kh. , Sedov A. V. , Novikova I. V. , Pavlenko E. V. , Lutokhina Yu. A. , Alexandrova S. A.
Published: October 2023

Aim. To study the spectrum of rhythm and conduction disorders in patients with arrhythmic variant of postcovid myocarditis and determine the treatment approaches.

Methods. The study included 23 patients with post-COVID-19 по абстракту разное написание. Post-COVID arrhythmias who had at least two of the three Lake-Louise criteria for myocarditis on magnetic resonance imaging of the heart and/or elevated anticardiac antibody (ACA) titers. The period of occurrence of post-COVID arrhythmias was 4.0 [2.0; 8.0] months, from 2 to 34 months. Echocardiography, Holter monitoring, and ACA study were performed. Cardiac magnetic resonance imaging was performed in 70% of patients (n=16). Coronary artery disease was excluded in 9 patients with risk factors.

Results. In all patients’ arrhythmias were associated with COVID-19. Rhythm and conduction disturbances occurred within 2 to 34 months after infection. Echocardiography revealed no left ventricle systolic dysfunction. In all patients, an increase in ACA by 3 or more times was noted, in 65.2% (n=15) a specific antinuclear factor (ANF) was detected, reflecting the high immunological activity of myocarditis. Ventricular arrhythmias in most cases were represented by frequent ventricular extrasystole. Among supraventricular arrhythmias, frequent extrasystoles, non-sustained tachycardia, paroxysmal form of atrial fibrillation were detected. In one case, a transient atrioventricular block II-III degree developed. Treatment approaches included antiarrhythmic and immunosuppressive therapy. All patients underwent Holter monitoring, which showed regression of arrhythmias. Patients with high immunological activity of myocarditis underwent immunosuppressive therapy with methylprednisolone 8-16 mg/day (n=13), with moderate - mild immune-suppressive therapy with hydroxychloroquine 200 mg/day (n=10). When controlling the ACA titers, their decrease was noted. The decrease in the specific ANF titer was close to statistically significant (p=0.057). Interventional treatment of arrhythmias was performed in three patients.

Conclusions. Arrhythmias that first developed after COVID-19 require the exclusion of subacute/chronic myocarditis that develops 2-8 months after COVID-19. The spectrum of arrhythmias in patients with post-COVID myocarditis is mostly represented by frequent symptomatic extrasystoles. Basic therapy of the arrhythmic variant of post-COVID myocarditis with methylprednisolone and/or hydroxychloroquine makes it possible to increase the effectiveness of antiarrhythmic drugs with the opportunity of their complete withdrawal in some patients.
YAPAY ZEKA ARAÇLARI İKY İÇİN NASIL DEĞER YARATABİLİR? ÇALIŞAN DUYGU ANALİZİNİN UYGULAMA ALANLARININ İNCELENMESİ
Authors: GERÇEK Merve , ÖZVEREN Cem Güney
Published: October 2023

İnsan Kaynakları Yönetimi (İKY), yapay zekanın ortaya çıkmasıyla birlikte derin bir dönüşüm geçirmektedir. Çalışanların duygularını analiz edebilme imkanı veren duygu analizi (sentiment analysis), İKY'de yapay zeka uygulamaları içerisinde gelecek vaat eden bir alandır. Bu çalışmada, İKY'de; çalışan duygu analizinin çeşitli uygulama alanlarını inceleyen 24 makalenin sistematik derleme yöntemiyle incelenmesi amaçlanmıştır. İnceleme, akademik makalelerden ve bilimsel toplantılarda sunulmuş bildirilerden elde edilen bulguları sentezleyerek alan özelinde önemli birtakım eğilimleri ve araştırma örüntülerini ortaya çıkarmaktadır. İncelenen araştırmalar; iş tatmini, işe alım, kurumsal itibar, örgüt ve çalışan performansı dahil olmak üzere çeşitli konularda çalışan duygu analizinin kullanılabileceğini göstermektedir. Sonuçlar, çalışan duygu analizinin İKY’de karar verme, stratejik planlama ve iş gücü yönetimi için değerli bilgiler sağlayabileceğini ortaya koymaktadır. Bununla birlikte; etik ikilemler, veri gizliliği noktasında duyulan endişeler ve güçlü duygu analizi araçlarına duyulan ihtiyaçlar, bu yenilikçi uygulamadan yararlanma konusunda birer zorluk olarak düşünülebilir. Bu çalışmanın, İKY bağlamında çalışan duygu analizinin mevcut durumuna dair bir perspektif sunarak araştırmacılara yol göstermesinin yanı sıra kamu ve özel sektör ayrımı olmaksızın çalışan verilerine yönelik söz konusu araçları kullanmak isteyen uygulamacılara da faydalı olacağı düşünülmektedir.