bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of extrusion ratio and die angle on the microstructure of an AA6063/SiC composite
Authors: Veerasundaram Jayaseelan , Kani Kalaichelvan , Murugesan Seeman , Nallamuthu Ramasamy 
Published: June 2022

Abstract
Manufacturers often employ the extrusion process to form an object with any cross-section. An experiment was carried out to examine the effect of die angle on the quality of the extruded product. The four types of extrusion dies were designed for finding the desirable quality of aluminium composite extruded billet. The five percentages of the Silicon carbide have been chosen as reinforcement with aluminium alloys. Further, the various extrusion dies configurations were considered as 12:8, 12:2, 12:4, and 8:4 for producing the extruded billets. In addition, the die angles that correspond to the required minimum extrusion load were determined. According to the findings, 12:8 extrusion configurations with a 30° die angle produced the desired quality billet and fine grain structure of extruded product with reduced extrusion load. The extruded billet surface quality was analyzed by scanning electron microscopy.
Experimental investigation of the impact behavior of glass/epoxy composite materials with the natural fiber layer
Authors: Al-Shamary Aidel Kadum Jassim , Karakuzu Ramazan , Kandas Halis , Ozdemir Okan 
Published: June 2022

Abstract
Owing to their specific advantages like thermal insulation, being lightweight and strong, laminated composites were designed by using natural fiber (female or male palm fiber) between two layers of glass stitched [0°/90°] to improve the impact properties of glass/epoxy composite. Natural fiber is cheap and plentiful in Iraq. The composite material was manufactured by vacuum assisted resin infusion molding (VARIM) at 80 °C for a duration of 8 h. The low velocity impact response of laminated composite was investigated experimentally. Impact tests were conducted on the composite specimens by Ceast Fractovis Plus impact test machine with constant mass of 5.03 kg at room temperature for the impact energies of 20 J, 30 J and 40 J. After impact tests, maximum contact forces versus impact energy, contact force versus deflection and absorbed energy-impact energy curves are drawn. The obtained results showed that the addition of palm fibers to glass/epoxy composite materials made significant contributions in absorbing energy and delaying the damage mode.
Tensile damage mechanisms of carbon fiber composites at high temperature by acoustic emission and fully connected neural network
Authors: Li Wei , Sun Ping , Liu Yinghonglin , Jiang Peng , Yan Xiaowei 
Published: June 2022

Abstract
In this paper, the tensile damage mechanism of carbon fiber composites at high temperatures is analyzed. The acoustic emission technique was employed to monitor the tensile process of specimens. The acoustic emission signals at high and room temperatures were classified based on k-means and the wavelet packet energy spectrum. The results show that the damage mechanisms at high temperatures and room temperature differ. At high temperatures, there is more stress release, the material instability appears earlier, and redistribution occurs in the specimen. The damage mechanisms include matrix cracking, fiber/matrix debonding, and fiber breakage. For damage mechanism identification, the acoustic emission characteristics were used under room temperature and high-temperature conditions in the fully connected neural network, with an accuracy rate of 97.5%. The results indicate that the network is suited for both high temperatures and room temperature and can better identify various damage mechanisms.
Revising quantum optical phenomena in adatoms coupled to graphene nanoantennas
Authors: Kosik Miriam , Müller Marvin M. , Słowik Karolina , Bryant Garnett , Ayuela Andrés , Rockstuhl Carsten , Pelc Marta 
Published: June 2022

AbstractGraphene flakes acting as photonic nanoantennas may sustain strong electromagnetic field localization and enhancement. To exploit the field enhancement, quantum emitters such as atoms or molecules should be positioned in such close proximity to the flake that electron tunneling might influence the optical and electronic properties of the system. However, tunneling is usually not considered if the optical coupling mechanism between quantum emitters and nanoantennas is at focus. This work presents a framework for describing the electron dynamics in hybrid systems consisting of graphene nanoflakes coupled both electronically and optically to adatoms and subject to external illumination. Our framework combines the single-particle tight-binding approach with a nonlinear master equation formalism that captures both optical and electronic interactions. We apply the framework to demonstrate the impact of electron tunneling between the adatom and the flake on emblematic quantum optical phenomena: degradation of coherent Rabi oscillations and quenching of Purcell spontaneous emission enhancement in two-level adatoms in proximity of triangular graphene nanoflakes.
Strategic applications of nano-fertilizers for sustainable agriculture: Benefits and bottlenecks
Authors: Avila-Quezada Graciela Dolores , Ingle Avinash P. , Golińska Patrycja , Rai Mahendra 
Published: June 2022

Abstract
The application of nano-fertilizers (NFs) is an emerging research field in agriculture. These are materials in the size range of 1–100 nm that support the nutrition of the plants. It is a novel way to optimize the nutrient supply, either alone or in combination. NFs are an economical alternative to ordinary chemical fertilizers that can increase global food production in a sustainable way. NFs are made up of nutrients and micronutrients and may act as carriers for nutrients. The nanocarriers deliver the nutrients to the right place, reducing the additional amount of active chemicals deposited in the plant, besides a slow release. Although nano-coated materials manage to penetrate through the stomata with a size exclusion limit greater than 10 nm, the nanoparticles appear to be able to make holes and enter the vascular system. This review addresses the potential benefits of NFs to agriculture, synthesis, mode of entry, mechanisms of action, and the fate of nanomaterials in soil. Finally, policy makers will have the bases to regulate the dose, frequency, and time period of NF applications for food production. We suggest formulating the integrated risk management frameworks for the possible applications of NFs in agriculture.
Archaeological Practices and Societal Challenges
Authors: Huvila Isto , Dallas Costis , Toumpouri Marina , Enqvist Delia Ní Chíobháin 
Published: June 2022

AbstractArchaeology and archaeological work are tightly linked to contemporary societal challenges. Archaeology has much to contribute to the understanding, contextualising and working out of global challenges from migration to environmental change. In parallel to how archaeology impacts society, the society, societal changes, and challenges impact archaeology and its public mission of preserving and interpreting the physical and curating the informational archaeological record. Similarly, they impact archaeological practices, that is how archaeology is done in practice. This article draws attention to the need to comprehend what the increasing diversity and multiplicity of links between archaeological practices, knowledge work, and contemporary societal challenges implies for the understanding of how archaeology is achieved and archaeological knowledge is produced. The discussion is based on input collected from 50 members of the COST Action Archaeological Practices and Knowledge Work in the Digital Environment (www.arkwork.eu) who shared their views on how archaeology can contribute to solving contemporary societal challenges and what societal changes and challenges are likely to affect the field of archaeology during the next 5 years. In addition to a continuing need to increase the understanding of archaeological practices and their implications, distilling the outcomes of the state of the art into shared, validated, and actionable lessons learned applicable for societal benefit remains another major challenge.
Assembled hybrid films based on sepiolite, phytic acid, polyaspartic acid and Fe3+ for flame-retardant cotton fabric
Authors: Xu Tong , Qian Di , Hu Yelei , Zhu Yuanzhao , Zhong Yi , Zhang Linping , Xu Hong , Mao Zhiping 
Published: June 2022

Abstract
To impart durable flame retardant property to cotton fabric, a kind of multilayered hybrid film based on environmentally friendly phytic acid, sepiolite, polyaspartic acid, and Fe3+ were deposited on the surface of cotton fabric by layer-by-layer and spraying method to form a dense protective layer. Compared with cotton fabric, hybrid film coated cotton showed excellent flame retardant property and low fire hazard, which can be demonstrated by vertical flame test, limiting oxygen index (LOI) and cone calorimeter test. After-flame time and after-glow time of hybrid film coated cotton is 1 s and 1 s, respectively. LOI value of hybrid film coated cotton increased by 44.4% compared with control sample. Cone calorimeter test revealed a total heat release rate reduction of 52.6% and peak heat release rate reduction of 73.6% for hybrid film coated cotton fabric. This work demonstrates that the hybrid film composed of phytic acid, sepiolite, polyaspartic acid, and Fe3+ could improve the durable flame retardant property of cotton fabric.
Assistenzsysteme mit Erfolgskontrolle durch KI
Authors: Folz Martin , Baumgärtel Franziska 
Published: June 2022

AbstractSteigende Komplexität und erhöhte Kundenanforderungen an Qualität und Lieferfähigkeit, aber auch der stetig zunehmende Fachkräftemangel sind heutige Herausforderungen der Arbeitswelt. Digitale Technologien wie Assistenzsysteme oder auch die künstliche Intelligenz (KI) sollen Mitarbeitenden bei der Erfüllung der Arbeitsprozesse unterstützen und diese transparenter, verständlicher und resilienter gegenüber Veränderungen gestalten. Aus diesem Grund hat das Mittelstand-Digital Zentrum Chemnitz einen Demonstrator entwickelt, der Assistenzsysteme mit KI verbindet. Hierbei wird ein Pick-und-Place-by-Light-System eingesetzt, um Mitarbeitende durch einen Montageprozess zu führen. Zusätzlich kommt zur Qualitätskontrolle eine kamerabasierte KI mit Objekterkennung zum Einsatz.
Match Demands of Male and Female International Lacrosse Players Competing Under the World Lacrosse Sixes Format
Authors: Weldon Anthony , Owen Adam L. , Loturco Irineu , Kyriacou Yianni , Wong Wesley , Malone Shane , Sampaio Jaime , Scanlan Aaron T. 
Published: June 2022

Abstract
Weldon, A, Owen, AL, Loturco, I, Kyriacou, Y, Wong, W, Malone, S, Sampaio, J, and Scanlan, AT. Match demands of male and female international lacrosse players competing under the World Lacrosse Sixes format. J Strength Cond Res 37(2): 413–422, 2023—World Lacrosse recently announced World Lacrosse Sixes, which aims to be a smaller, faster, and more accessible format of lacrosse, when compared with traditional field lacrosse. This investigation aimed to quantify the movement and physiological demands of World Lacrosse Sixes in male (n = 25) and female (n = 22) international players. Match data were collected using Catapult Sports Vector S7 global navigation satellite system microsensors and Polar H1 heart rate (HR) monitors across 7 competitive matches. Results showed that 30–33% of the total distance covered by players was completed by walking (0–2 m·s−1), 42–44% jogging (2–4 m·s−1), 21% running (4–6 m·s−1), and 0–2% sprinting (>6 m·s−1). Mean relative HR (%HRmax) was similar (p > 0.05,

= 0.002; no effect) between sexes across matches (median values: male players = 93.5%; female players = 93.8%). Male players performed more accelerations (p < 0.001;

= 0.117; moderate) and decelerations at ±4 m·s−2 (p < 0.001;

= 0.135; moderate) and distance sprinting at >6 m·s−1 (p < 0.001;

= 0.416; large) than female players. Whereas female players performed more accelerations (p < 0.001;

= 0.20; large) and decelerations at ±2–3 m·s−2 (p < 0.001;

= 0.33; large) and impacts at 5–9 g-forces (p < 0.033;

= 0.063; moderate) than male players. These data are the first representing the movement and physiological demands of male and female players in World Lacrosse Sixes, allowing lacrosse coaches and the athlete support team to make informed and sex-specific decisions when developing training, testing, and tactical strategies to optimize player health and performance.
How Does Lower-Body and Upper-Body Strength Relate to Maximum Split Jerk Performance?
Authors: Soriano Marcos A. , Jiménez-Ormeño Ester , Amaro-Gahete Francisco J. , Haff G. Gregory , Comfort Paul 
Published: June 2022

Abstract
Soriano, MA, Jiménez-Ormeño, E, Amaro-Gahete, FJ, Haff, GG, and Comfort, P. How does lower-body and upper-body strength relate to maximum split jerk performance? J Strength Cond Res 36(8): 2102–2107, 2022—The aims of this study were to (I) determine the relationships between the maximum dynamic strength of the upper and lower body, measured by overhead press and back squat 1 repetition maximum (1RM) performances, and the split jerk (SJ) performance in trained weightlifters and (II) explore the magnitude of these relationships for men and women to establish sex-specific prediction equations. Twenty men (age: 28.9 ± 6.6 years; height: 1.8 ± 0.1 m; body mass [BM]: 82.5 ± 10.2 kg; weightlifting training experience: 4.2 ± 2.4 years) and 13 women (age: 27.7 ± 4.4 years; height: 1.7 ± 0.1 m; BM: 61.8 ± 5.2 kg; weightlifting training experience: 2.7 ± 1.7 years) competitive weightlifters participated. The 1RM performances of the overhead press, back squat, and SJ were assessed for all subjects. A very strong correlation exists between the back squat and overhead press, with maximum SJ performance for all subjects (r = 0.97; p < 0.001). Similarly, very strong correlations were found for men (r = 0.90, p < 0.001) and women (r = 0.90, p = 0.0002), separately. The coefficient of determination indicates that the prediction equation for the maximum SJ performance is quite accurate (R
2 = 0.94) for all subjects and men (R
2 = 0.83) and women (R
2 = 0.81), separately. These results provide evidence that the maximum strength of the upper and lower body are major contributors to SJ performance. In addition, SJ performance can accurately be predicted from the back squat and overhead press performances.
Novel GLCCI1-BRAF fusion drives kinase signaling in a case of pheochromocytomatosis
Authors: Green Benjamin L , Grant Robert R C , Richie Christopher T , Chatterjee Bishwanath , Sampaio De Melo Michelly , Barr Frederic G , Pacak Karel , Agarwal Sunita K , Nilubol Naris 
Published: June 2022

Abstract

Introduction
Recurrent and metastatic pheochromocytoma (PCC) are rare advanced endocrine neoplasms with limited treatment options. Insight into the pathogenic molecular alterations in patients with advanced PCC can provide therapeutic options for precisely targeting dysregulated pathways.

Objective
We report the discovery and characterization of a novel BRAF-containing fusion transcript and its downstream molecular alterations in a patient with recurrent PCC with peritoneal seeding (pheochromocytomatosis).

Methods
We reviewed the medical record of a patient with pheochromocytomatosis. A comprehensive pan-cancer molecular profiling using next-generation sequencing (NGS) as well as confirmatory real-time-quantitative PCR were performed on surgical specimens. BRAF rearrangement and downstream molecular changes were assayed using fluorescence in situ hybridization (FISH) and immunohistochemistry (IHC), respectively. Western blot was used to assess the in vitro activation of the mitogen-activated protein kinase (MAPK) signaling pathway and the EMT markers in transfected HEK-293 cells.

Results
The NGS analysis of a specimen from a 72-year-old female patient with pheochromocytomatosis showed an in-frame fusion of exon 3 of Glucocorticoid Induced 1 (GLCCI1) to exon 9 of BRAF. The upstream auto-inhibitory domain of BRAF was excluded from the GLCCI1-BRAF fusion; however, the downstream BRAF kinase domain was intact. A BRAF rearrangement was confirmed via a BRAF-specific break-apart FISH assay. Four separate tumor foci harbored GLCCI1-BRAF fusion. IHC demonstrated increased phosphorylated MEK. HEK-293 cells transfected with the GLCCI1-BRAF fusion demonstrated increased phosphorylated MEK as well as higher expression of EMT markers SNAI1 and ZEB1 in vitro.

Conclusion
We demonstrate a novel pathogenic gene fusion of GLCCI1 with the oncogenic kinase domain of BRAF, resulting in an activation of the MAPK signaling pathway and EMT markers. Thus, this patient may benefit from clinically available MEK and/or BRAF inhibitors when systemic therapy is indicated.

Summary statement
This report is the first of GLCCI1 fused to BRAF in a human neoplasm and only the second BRAF-containing fusion transcript in PCC. Detailed molecular characterization of PCC can be a valuable tool in managing patients with recurrent PCC and pheochromocytomatosis that represents a significant clinical challenge.
A DILATOMETER FOR THE CARBON FIBER COMPOSITE TUBES
Authors: Dergal E.S. , Kudrevatykh O.T. , Quinn N.O. 
Published: June 2022

A device and method for measuring the coefficient of thermal expansion of composites based on digital recordings of the indicating laser spot displacement has been developed. Specific holders for support of the test object and an optical arrangement of the dilatometer are proposed to measure the deformation of the carbon fiber reinforced compositetubes due to temperature changes. The advantages of the system include high sensitivity and the ability to examine composite tubes with varied length (from 0,2 m to 2 m) with high accuracy. A special heating system for temperature changes in examined objectsbased on conductivity of carbon fiber has been developed. The sensitivity of the dilatometer can be adjusted in according to the size of examined objects.
НАЗЕМНОЕ ОБЕСПЕЧЕНИЕ ПОЛЕТНОЙ И ЭКСПЛУАТАЦИОННОЙ РАДИОМЕТРИЧЕСКОЙ КАЛИБРОВКИ ОПТИЧЕСКОЙ ПОЛЕЗНОЙ НАГРУЗКИ КОСМИЧЕСКОГО АППАРАТА
Authors: Луць О. В. , Борщева Г. А. Борщева , Ярмольчук Е. Д. , Манойленко А. А. 
Published: June 2022

A description of the proposed ground support for flight and operational radiometric calibration of the optical payload is given. Initial positions and assumptions adopted during
the development of calibration algorithms are formulated. The definitions of basic quantities and used quantitative ratios are given. An algorithm for calculating the energy brightness of the radiation when shooting test objects is proposed. An example of calculating the calibration characteristics of the spectral channels of the payload is given, and an estimate of the calculation error is made.
ХОЛЛОВСКИЙ ДВИГАТЕЛЬ ST-25 ДЛЯ МАЛЫХ КОСМИЧЕСКИХ АППАРАТОВ
Authors: Петренко А.Н. , Кулагин С.Н. , Толок С. , Сербин В.В. , Вороновский Д. , Маслов В. 
Published: June 2022

Results of development and experimental tests of Hall Thruster ST-25 are presented. This thruster is intended for application on small space vehicles. With the purpose of decrease of input electric power in the magnetic system of thruster a permanent magnet is applied. In the process of the thruster development his laboratory tests were conducted with the laboratory prototypes of electric power supplies. Final tests were conducted with the flying prototype of discharge power supply. Laboratory tests have confirmed the rightness of the technical decisions stopped up in the construction of Thruster. Methodology of the thruster ST-25 start at the use of preheated cathode and flying prototype of the discharge power supply were improved. Possibility of application of such type of Hall Thrusters on space vehicles with the size of on-board electric power of that is limited to the size 300 - 500 W were confirmed.
Work-related informal learning in knowledge-intensive industry
Authors: Gáthy-Stéber Andrea 
Published: June 2022

AbstractThis study investigates occurrences and tools of informal and non-formal learning at work, focusing on the Hungarian IT sector. The aim is to demonstrate that learning at work mainly manifests informally and to identify its patterns. Companies shifting towards teleworking during the pandemic further increased the importance of informal learning. The empirical research uses complex methodology of three pillars: A questionnaire about workplace learning conducted among employees in the IT sector (N = 162). Case studies of three Hungarian IT companies using questionnaires and semi-structured interviews. Learning activity logging of work-related learning events were recorded by participating employees (N = 19). According to the main conclusions there is a positive correlation between the number of available workplace learning opportunities and opinions on the efficacy of informal learning. Informal learning dominates the learning patterns of employees in a knowledge-intensive industry. In supporting employees’ learning the average number of informal learning opportunities are significantly higher than those of formal learning and both employees and employers agree that this mode of learning is more effective.The results highlight that reinterpreting workplace learning is necessary due to economic, social and technological trends not to mention employer flexibility becoming more and more inevitable. Thus, the importance of informal learning is unquestionable.
Advancement of inductive reasoning of engineering students
Authors: Tóth Peter , Pogatsnik Monika 
Published: June 2022

AbstractThe task of higher education is twofold: (1) to prepare students to meet the expectations of the labor market and (2) to create a learning environment and conditions so that as many students can meet the subject requirements as possible, the dropout rate should be the lowest possible. Input and continuous monitoring of students' transversal competencies can be a suitable method to meet this dual requirement. The range of these competencies is very diverse. In our present study, we focused on inductive thinking, which plays an important role in problem-solving. The research involved 212 first-grade BSc technical students. Our measurement tool is widely used in the selection of the workforce, which the students had to fill in online. The gained results were evaluated using IBM SPSS Statistics. The analysis included a comparison of inductive thinking and its two subcomponents, abstract reasoning, and diagrammatic cognition, in terms of background variables, as well as time consumption, and the definition of specific performance. We found a functional relationship between time consumption and the performance achieved in the test. Students have advanced analogical cognition in terms of abstract thinking; however, their diagrammatic thinking shows very different levels of development, which can cause difficulties in solving technical problems.