bluuebunny/crossref_metadata_2025_split huggingface dataset:
Deterioration of concrete under the coupling action of freeze–thaw cycles and salt solution erosion
Authors: Li Hao , Guo Haolong , Zhang Yuan 
Published: May 2022

Abstract
In this article, the deterioration law of concrete under the coupling action of freeze–thaw cycles and salt solution erosion is studied through the comprehensive thermal analysis, the field emission electron microscope, and the nuclear magnetic resonance, and the influence of salt solution type and salt solution concentration is considered. The results show that the freeze–thaw damage of concrete in the salt solution is the combined effect of the expansion pressure of the freeze–thaw erosion product, the crystallization pressure of the salt solution, and the frost heave pressure of the fresh water; the damage degree increases with the increase of freezing and thawing cycles; the damage degree of concrete in the chloride solution is greater than that in the sulfate solution and fresh water before 150 freezing and thawing cycles; the damage degree of concrete in the sulfate solution is greater than that in the chloride solution after 150 freezing and thawing cycles; the pores size of concrete in the salt solution is larger than that in fresh water, the main peak of the difference of pore size proportion shifts to the harmful pore area, and the secondary peak and third peak appear in the seriously harmful pore area; the pore diameters of the main peak, the secondary peak and the third peak of concrete in different salt solution, and the limiting pore diameters are 0.0662, 1.145, and 10.116 μm, respectively; the safe service life of concrete in salt solution environment after freezing and thawing cycles is predicted by the Weibull distributed life evaluation model. The maximum life after the freeze–thaw cycle is 33 years, which is at least 42% lower than that in the fresh water environment after freezing and thawing cycles.
Are Non-Primary Exports the Source for Further Economic Growth in the UAE?
Authors: Kalaitzi Athanasia Stylianou , Kherfi Samer , Alrousan Sahel , Katsaiti Marina-Selini 
Published: May 2022

Abstract
This paper investigates whether non-primary exports directly or indirectly cause economic growth in the United Arab Emirates (UAE). This study performs the Johansen test to examine the presence of co-integration between the variables in an augmented production function. The Granger causality test is performed to investigate the short-run causality between non-primary exports and economic growth, while the long-run causality is investigated by employing the Toda and Yamamoto procedure. The empirical analysis indicates that the variables are co-integrated, and that short-run causality runs from non-primary exports to economic growth; results exhibit no evidence of direct causality from non-primary exports to economic growth in the long-run.
Synchronous AML and pancreatic neuroendocrine neoplasm, both successfully treated with somatostatin analogs and decitabine
Authors: Ehsanullah Syed , Trikalinos Nikolaos A 
Published: May 2022

Summary
Downregulation of tumor suppression genes by DNA hypermethylation has been proposed as a potential cause of neuroendocrine neoplasm (NEN) formation. In this report, we present a patient simultaneously diagnosed with acute myeloid leukemia (AML) and a metastatic nonfunctioning pancreatic NEN. Because of the two competing diagnoses, he was treated with lanreotide, venetoclax and a long course of the hypomethylating agent decitabine. The AML responded to venetoclax and decitabine treatment while the PanNEN stabilized on lanreotide. Over multiple months of treatment, the PanNEN showed gradual tumor response, consistent with decitabine treatment effect, and the patient remained without disease progression for both malignancies. We believe that some PanNENs can benefit from treatment with hypomethylating agents such as decitabine. To support this, we review the relevant literature and suggest a mechanism for the efficacy of decitabine in our case.

Learning points

Neuroendocrine neoplasms are associated with an increased risk of second primary cancers.

Epigenetic changes such as hypermethylation and inhibition of tumor suppressor genes might explain the development and behavior of certain NENs.

The use of hypomethylating agents such as decitabine might have a role in the treatment of PanNENs. Future studies are needed to confirm that.
Relationships between mineral nutrients in banana (Musa AAA Simmonds cv. Williams) bunches fertilized with nitrogen in two production cycles
Authors: García-Guzmán Sebastián David , Morales Romero Sebastián Camilo , Torres Bazurto Jaime , Sánchez Jaiver Danilo 
Published: May 2022

The production of bananas (Musa AAA Simmonds cv. Williams) for export in Uraba, Colombia is an important source of income for the region, reflected in the offer of approximately 40,000 jobs. Production requires research into various subjects, with fertilization being a priority. In this study, the effect of N doses on the nutrient relationships existing in a banana bunch during two cycles was evaluated. A sixth-generation plantation was used and evaluated during the fruit filling and harvesting stages. A multivariate approach was used for the analysis of variance of the design in repeated measures, with two factors between subjects (fertilization and repetitions), and one intra-subject associated with the cycle. The models were adjusted with the phenological stages. Synergy was found between Mg:Ca+N, Zn:B, K:Cu, K:P, and Ca:Cu, with K:P and K:Cu ratios being the only ones that showed a directly proportional behavior with the production variables. Optimal values of the interaction K:Cu+K:P (35.11-39.05) led to a greater accumulation of dry mass in the bunch (4.24 kg) in the treatments of 321.8 and 483 kg N ha-1 for the evaluated stages.
Sampling methods of symphylids in pineapple (Ananas comosus L.) crops in Santander, Colombia
Authors: Montes-Rodríguez José Mauricio , Ossa-Yepes Juan Felipe 
Published: May 2022

In the pineapple growing region of Lebrija, Santander, one of the largest such regions in Colombia, five farms were selected, and a sampling of symphylids associated with this crop was carried out in the first months of cultivation in the variety Perolera and hybrid MD2. Two collecting methods were compared: i) the destructive method, with soil inspection around the roots, and ii) the bait-trap method with pieces of potato mixed with soil. These two methods were implemented in the same plots during five bimonthly samplings. Additionally, the percentage of root damage was estimated, defined as the percentage of roots that show bifurcation due to the damage caused by symphylids. All symphylids were identified as Hanseniella sp. Sampling of symphylids based on underground potato bait traps requires fewer samples to estimate population density and is a predictor of root damage while destructive sampling is not. Consequently, trap sampling could be a useful tool for monitoring and managing symphylids on pineapple. The abundance was related to soil moisture, and not to soil pH.
Learning, Practicing, and Developing Traditional Handicrafts in Latvia Today
Authors: Karlsone Anete 
Published: May 2022

AbstractLatvian folk crafts are characterized by a predominance of women's handicrafts: weaving, knitting, embroidery, and so on, which are practiced both in groups and individually. This article focuses on the interaction between cultural heritage and creative trends in folk crafts in Latvia, examining the way in which artisans learn traditional crafts and the main areas of their activity. Given the context, the aim of this paper is to provide an overview on the development of Latvian handicrafts today based on empirical study which relied on information found on social networks about the latest activities of craftspeople. In addition to personal observations, publications dedicated to the development of folk art in Latvia during the Soviet period and today were also used as sources for the study. In recent years, the growing popularity of the Latvian national costume has stimulated the desire of many people to not only wear the costume but also learn how to make their own version. The Latvian national costume is a combination of various types of handicrafts, and some elements of folk costumes are also used in modern clothing. Nowadays, learning crafts in studios and hobby groups has become the main way to acquire handicraft skills. Training in these settings is based on ethnographic research and information available from modern sources. Works created in handicraft studios and hobby groups are regularly exhibited at local and national exhibitions. Craftspeople in modern-day Latvia merge the study of traditional, ethnographic material with creative self-expression in the production of objects for modern use. Creativity and inherited traditions are therefore combined to various extents depending on the type of objects and their use. Masters of traditional handicrafts participate in the annual public workshop series called Meet Your Master!, which has become a well-known event for popularizing folk crafts in Latvia.
The cold case of Aitnaiai's stagecraft
Authors: Cagnazzo Daniela Immacolata 
Published: May 2022

Abstract
Although no Aeschylean hypomnemata have been preserved, the papyri have returned evidences of ancient scholarship, such as fragments with marginalia and hypotheseis of several lost tragedies. For this reason, it is difficult to compare the scholia tradition, but it provides particular value for these ancient annotations. If the limited papyrus notes could testify a lower fortune of Aeschylus, the discovery of scholar materials, linked with lost tragedies, denotes that his productions was still available during the first centuries of Imperial Age. Interesting evidence is P.Oxy. XX 2257, which offers important information on the Aitnaiai stagecraft. My purpose is to reconstruct the drama setting and explain the technical modality of scene changes.
Fatum necessitatis lex. The tomb of Ovid in the Hungarian historiography (16–18th century)
Authors: Sánta Sára 
Published: May 2022

Abstract
The legend of Ovid’s Hungarian tomb appeared in the historiography in the 16th century: besides the numerous Ovid-tombs that turned up all across Europe, Wolfgang Lazius was the first who mentioned in his work Commentarii Reipublicae Romanae that the grave of the poet destined to a tragic fate was discovered in Savaria-Szombathely. Then – at the end of the 16th century, probably through Polish influence – a four-line ‘epitaph’ expanded the narrative. In my paper I aim to enlighten how the legend of Ovid’s tomb appeared in the Hungarian historiography of the 16–18th century, how the authors tried to eliminate historical contradictions, and also, I intend to present the different concepts on the creation and the authenticity of the alleged epitaph today.
Eric Voegelin's and Simone Weil's return to Ancient Greece
Authors: Sojer Thomas 
Published: May 2022

Summary
Two enigmatic figures of 20th-century political theory, Eric Voegelin and Simone Weil, stand out with idiosyncratic receptions of ancient Greek texts. Both thinkers diagnosed that, as political agents in late modernity, we have unlearned to read world-making ancient texts and their narratives in their cosmic dimension and thus lost what has rooted European culture and history. Against this backdrop, Voegelin and Weil share ‘antidotal’ practises of combining historically and generically distinct material. These practices aim at fathoming a primordial experience at work in European narratives. With this comparative analysis of Voegelin's and Weil's symbolic readings (exemplified in this paper by passages from the Iliad, the History of the Peloponnesian War, and the Symposium), I present some considerations how their combinatory imagination of ancient material could supply late modern political agents with a pathos, a meaningful self-world relationship that was thought to have gone missing.
Strength analysis of prestressed vertical cylindrical steel oil tanks under operational and dynamic loads
Authors: Tursunkululy Timur , Zhangabay Nurlan , Avramov Konstantin , Chernobryvko Maryna , Suleimenov Ulanbator , Utelbayeva Akmaral , Duissenbekov Bolat , Aikozov Yermurat , Dauitbek Bakdaulet , Abdimanat Zhuldyz 
Published: May 2022

This paper reports a study into the effect of the winding type on the stressed-strained state of the wall of a steel cylindrical tank filled with oil to the predefined level. The shapes of free oscillations of oil in the tank and the effect of the winding type on the natural frequencies of the structure were analyzed. Stress in the tank wall was estimated on the basis of finite-element simulation of the deformation of a three-dimensional structural model under the influence of distributed oil pressure on the inner surface of the wall and stresses on the outer surface of the wall. The stresses were induced by the winding of various types, taking into consideration the level of oil loading, the winding step of the winding, and the mechanical characteristics of the thread.
The stressed-strained state of a cylindrical tank with winding was investigated at its full filling with oil, half-filling with oil, and without oil. Three winding options were simulated: single, double, and triple intervals. Two types of winding were considered: made from high-strength steel wire and made from composite thread. It was established that when winding the tank wall with steel wire at a triple interval, the stress in the structure does not exceed 34.2 % of the yield strength. At the same time, the height of oil loading does not significantly affect its strength. Applying a composite thread leads to an increase in the stress of up to 47.2 % of the yield strength but makes it possible to reduce the mass of the tank with winding. When winding with a composite thread at a triple interval, the mass of the structure increases by only 3.6 %. The results reported here make it possible to effectively use pre-stress in order to improve the strength and dynamic characteristics of the studied structures, taking into consideration their windings made of different materials
Developing plastic recycling classifier by deep learning and directed acyclic graph residual network
Authors: Mohammed Ahmed Burhan , Al-Mafrji Ahmad Abdullah Mohammed , Yassen Moumena Salah , Sabry Ahmad H. 
Published: May 2022

Recycling is one of the most important approaches to safeguard the environment since it aims to reduce waste in landfills while conserving natural resources. Using deep Learning networks, this group of wastes may be automatically classified on the belts of a waste sorting plant. However, a basic set of connected layers may not be adequate to give satisfactory accuracy for such multi output classifier tasks. To optimize the gradient flow and enable deeper training for network design with multi label classifier, this study suggests a residual-based deep learning convolutional neural network. For network training, ten classes have been explored. The Directed Acyclic Graph (DAG) is a structure with hidden layers that have inputs, outputs, and other layers. The DAG network's residual-based architecture features shortcut connections that bypass some levels of the network, allowing gradients of network parameters to travel freely among the network output layers for deeper training. The methodology includes:
1) preparing the data and creating an augmented image data store;
2) defining the main serially-connected branches of the network architecture;
3) defining the residual interconnections that bypass the main branch layers;
4) defining layers, and finally;
5) creating a residual-based deeper layer graph.
The concept is to split down the multiclass classification problem into minor binary states, where every classifier performs as an expert by concentrating on discriminating between only two labels, improving total accuracy. The results achieve (2.861 %) training error and (9.76 %) a validation error. The training results of this classifier are evaluated by finding the training error, validation error, and showing the confusion matrix of validation data
Determining features of the deformed state of reinforced concrete beams of road bridges when strengthening the span structures
Authors: Kliuchnyk Serhii , Spivak Dmytro , Goryushkin Igor 
Published: May 2022

The technology of repairing reinforced concrete bridges typically involves closing traffic on one half of the structure and performing work on it when it is possible to move vehicles on the second part of this structure. The main process of interest to practitioners in terms of hardening concrete, which occurs in the beams of a span structure during the passage of a temporary moving load, is deformation. By the time the cement of freshly laid concrete of the overhead reinforcement slab is hardened, it is necessary to create the necessary conditions for this (temperature, humidity, immobility over time, etc.). Before concrete acquires strength, movements arising in the span structure cause the destruction of cement stone at the formation stage. It is necessary to investigate the presence of deformations, as well as their impact on the impossibility of forming a homogeneous structure of concrete and its adhesion to reinforcing elements that combine the existing slab with the new one.
This study has established deformations induced by a temporary load from 1.61 to 5.83 mm, which have a negative impact on the process of solidification of concrete in the reinforcement slab for a span structure during the repair of a motorway bridge. The three-dimensional models were calculated by simulating a bridge of the M-04 highway. The results underlie the conclusions that the technology of repair work does not take into consideration the required conditions for high-quality concrete strength acquisition in an additional slab.
The study results established that operations on concreting an additional overhead reinforcement slab in the presence of vibrational effects exerted by the temporary load on the span structure cannot be performed because of the destruction of concrete at the hardening stage.
Given the above issue, several ways to address it have been devised and analyzed; the best of them is recommended
Establishing regularities of temperature conductivity reduction when protecting fabric against fire by intumescent coating
Authors: Tsapko Yuriy , Tsapko Аleksii , Buiskykh Nataliia , Horbachova Oleksandra , Mazurchuk Serhii , Matviichuk Andrii , Sarapin Yuriy 
Published: May 2022

This paper has analyzed materials for fire protection of textile products; it was found that there are not enough data to explain and describe the process of fire protection. Neglecting modern coatings leads to the ignition of fabric structures under the action of flame. Devising reliable methods for studying the conditions of fabric fire protection leads to the design of new types of fireproof materials. Therefore, there is a need to determine the conditions that form a barrier to high fabric temperature and to establish a mechanism for inhibiting heat transfer to the material. In this regard, the thermal conductivity process was simulated on the fabric surface using an intumescent coating, which makes it possible to estimate the coefficient of thermal conductivity at high temperatures. Based on the experimental data and theoretical dependences, the thermal conductivity coefficient of the fire-retardant layer of coked foam was calculated, which is 8.9×10-6 m2/s, due to the formation of a heat-insulating layer. The study results proved that the process of thermal insulation of textile material involves not only the decomposition of flame retardants with the formation of inert gases that interact with the flame on the sample surface but also the inhibition of heat transfer to the material treated with an intumescent coating that forms a thermally-insulating layer of coked foam on the fabric surface. The maximum possible penetration of temperature was estimated, namely generating a temperature on the sample's surface that significantly exceeds the ignition temperature of the fabric, and does not exceed 215 °C on the unheated surface. Thus, there is reason to argue about the possibility of targeted adjustment of the processes of fabric fire protection by applying coatings capable of forming a protective layer on the surface of the material, which inhibits the rate of heat transfer
Definition of the role of polyvinyl alcohol during formation and in the structure of cathodic synthesized composite electrochromic nickel hydroxide layer: template or surfactant
Authors: Kovalenko Vadym , Kotok Valerii , Zima Oleksandra , Nafeev Rovil , Verbitskiy Volodymyr , Melnyk Olena 
Published: May 2022

One of the promising applications of nickel hydroxide is electrochemical electrochromic devices. To significantly improve the characteristics, the role of polyvinyl alcohol (PVA) in the synthesis and structure of composite Ni(OH)2-PVA films was investigated by studying the effect of its concentration (30, 40, 50 g/l) and polymerization degree (17-99, 24-99, 30-99 types). Adhesion was investigated visually, and electrochemical and electrochromic properties – by cyclic voltammetry with simultaneous recording of optical characteristics. It was shown that at a concentration of 30 g/l, the film peeled off and had weak electrochemical and electrochromic properties. The presence of two cathodic peaks (E=500–510 mV and E=560 mV) on the cyclic voltammetry showed the presence of nickel hydroxide in the PVA matrix and nickel hydroxide with adsorbed PVA. This indicates the dual role of PVA as a surfactant and as a template. At low concentrations, the role of PVA as a surfactant prevailed. Increasing the concentration led to an increase in the film characteristics by strengthening the role of PVA as a template: at 50 g/l, the film did not peel off and has good electrochemical and electrochromic characteristics.
It is shown that at a low degree of polymerization, PVA (17-99 type) mainly played the role of a surfactant but was also a template. The film cracked and had mediocre characteristics. The use of medium polymerization PVA (24-99 type) gave a film with high adhesion, electrochemical and electrochromic characteristics. It is shown that in this case, PVA performed the function of a template, there was only one cathodic peak on the voltammogram at E=500–510 mV. It was found that the use of PVA with a high degree of polymerization (30-99 type) led to a significant deterioration of the characteristics, including complete peeling of the film. This is probably due to the loss of PVA in the film