bluuebunny/crossref_metadata_2025_split huggingface dataset:
Master curves construction for viscoelastic functions of bituminous materials
Authors: Polacco Giovanni , Filippi Sara 
Published: March 2024

Abstract
The performance of bituminous materials is often evaluated using rheological properties measured within the linear viscoelastic region. If there is a univocal temperature dependence of all the relaxation times, data obtained in different operating conditions can be translated onto a logarithmic scale where they partially overlap and merge into a single master curve. This is the well-known time–temperature superposition principle that has been successfully applied for decades. However, the empirical nature of the method has led to many different procedures being used for the graphical construction of the master curve. In addition, the continuously increasing calculating power has led to new approaches, such as the simultaneous modelling of the represented viscoelastic function. Losing track of the basic statements of the method is the hidden drawback of this wide range of available protocols with the risk of artefacts and incongruences being introduced in the construction of the master curves. This review summarizes these basic statements together with the empirical and phenomenological approaches developed over the years. The aim of this study is to help the reader in choosing the most appropriate method to build the master curves. Although the subject of the review is of general application, the field of bitumen is focused on.
A comparative study on corrosion and wear performances of Ti–Nb–(Cu, Co) biomedical shape memory alloys
Authors: Wang Yunfei , Liu Wei , Liu Xinnuo , Wang Haizhen , Sun Bin , Cao Xinjian , Liu Xiao , Song Yuehai , Yi Xiaoyang , Meng Xianglong , Gao Zhiyong 
Published: March 2024

Abstract
The present study presented the systematic investigations on the influence of Co and Cu on the corrosion behaviors and wear resistance of Ti–Nb based shape memory alloys. The results demonstrated that the addition of Co and Cu can effectively enhance the corrosion resistance of Ti–Nb based shape memory alloys. By optimizing the chemical composition, the superior corrosion resistance with (φ
corr = –0.95499 V, J
corr = 357.92 μA cm−2) and (φ
corr = –0.96775 V, J
corr = 467.54 μA cm−2) can be obtained in Ti–Nb–Co1.0 and Ti–Nb–Cu1.5 shape memory alloys, respectively. Similarly, the wear properties of Ti–Nb based shape memory alloys were also dependent on the ternary alloying elements. The friction coefficient of Ti–Nb based shape memory alloy firstly decreased and then increased with the content of ternary alloying element increasing. And then decreased again, as the exceeding ternary alloying element was added. In addition, the wear behaviors of Ti–Nb based shape memory alloys can be attributed to the combination of abrasive wear, adhesive wear, and oxidative wear, irrespective of the types of ternary alloying elements. In contrast, Ti–Nb–Cu5.0 shape memory alloy has the lowest friction coefficient of 0.45, which is smaller than that (0.50) of Ti–Nb–Co5.0 shape memory alloy.
Stiftung dekolonisiert: Eine Lektüre von Merleau-Pontys Vorlesungen über Institution
Authors: Guenther Lisa 
Published: March 2024

Abstract
This paper offers a close reading of Merleau-Ponty’s Institution Course Notes to reflect on the history of colonisation as both an event and a structure. On the one hand, colonial invasion is a singular cataclysmic event; on the other hand, it establishes legal, social, economic and psychic structures that seem increasingly inevitable the more they are repeated. Likewise, decolonisation may require a singular liberatory event, but it also calls for the (re)establishment of alternative traditions that issue a different “call to follow.” A critical interpretation of Merleau-Ponty in conversation with abolitionist and decolonial thinkers helps to clarify the temporal and political relation between event and structure, building bridges between phenomenology and radical politics.
A study of the vibrations of a rotor bearing suspended by a hybrid spring system of shape memory alloys
Authors: Mohammed Laith H. , Atiyah Qasim A. 
Published: March 2024

Abstract
The study of rotor-bearing vibration is crucial across various fields, encompassing applications such as rotating machinery, wind turbines, washing machines, and elevators. However, operational challenges can arise from these machines’ propensity to vibrate under specific conditions. To address this issue, the current research investigates the utilization of shape memory alloy (SMA) springs as intelligent materials in the rotor suspension system. SMA’s unique property of changing stiffness with temperature-induced phase shifts is harnessed, leading to the construction of a test rig for validating vibration characteristics. A novel hybrid bearing is devised to effectively manage vibrations, particularly in resonance zones. To the authors’ knowledge, this new model is never reported in the literature. Then, an accelerometer is employed to measure the rotor shaft response corresponding to disc position vibration signals. Furthermore, a numerical model is developed to validate experimental results, taking into account the phase change of SMA springs and the disc’s influence on the rotor bearing’s natural frequency. Temperature variations from 20 to 80°C resulted in a 13% change in natural frequency for the hybrid spring configuration. The experimental findings align closely with ANSYS simulations, displaying an acceptable error ratio, with the highest error remaining within 20% thresholds.
Flood risk assessment, a case study in an arid environment of Southeast Morocco
Authors: Diani Khadija , Hamza Mohamed Hafedh , Elbelrhiti Hicham , Kacimi Ilias , Faqihi Fatima Zahra , Haghighi Ali Torabi , El Amrani Mohamed , Hahou Youssef , Masmoudi Lhoussaine , Lahcen Ousaid , Alshehri Fahad , Elhag Mohamed 
Published: March 2024

Abstract
Since the early 1980s, several regions of Morocco have experienced alternating series of wet and dry periods related to climate change, with significant consequences for the country’s economy. This study aims to map flood hazards by using a hydraulic modeling approach, with a specific focus on the Oued (river) Zaouiat Sidi Hamza passing through Zaouiat Sidi Hamza township belonging to the High Ziz watershed (province of Midelt, region of Drâa-Tafilalet, Morocco). Hydraulic modeling and flood simulation were carried out followed by mapping of the flood hazard. The Oued Zaouiat Sidi Hamza River can cause torrential flooding issues, particularly during periods of heavy storms, impacting agricultural land and certain buildings on both river banks. All the cultivated areas developed alongside the river are at risk of flooding. Moreover, undermining and erosion of the river’s banks lead to rising high-water levels and flooding agricultural terraces. The use of geographic information systems and hydraulic modeling tools is essential to gain a deeper understanding of this situation. Also, the mapping of lineaments and fractures in the study area, carried out by satellite image processing, helped to quantify the directional influence of these lineaments on the flow of the hydrographic network, on the orientation of the circulation of surface water, and on the storage of groundwater. According to this study, the most vulnerable areas to flooding and erosion are those that receive the most water in the basin and have steep slopes. Decision-makers can use the results to produce development plans tailored to combat these risks and raise awareness among the population concerned, improving water resource evaluation and forecasting, as well as improving agricultural production.
The effect of Artemisia annua L. aqueous and methanolic extracts on insulin signaling in liver of HFD/STZ diabetic mice
Authors: Reza Seyedi Moqadam S. Mohammad , Lamuki Mohammad Shokrzadeh , Sadeghimahalli Forouzan , Ghanbari Mahshid 
Published: March 2024

Abstract

Objectives
Many studies have shown the anti-diabetic effects of medicinal plants. But their molecular mechanism has been less studied. Understanding of these mechanisms can help to better manage the treatment of diabetes by using these plants. So, this research examined the effect of Artemisia annua extract on PI3K (phosphatidylinositol 3-kinase)/AKt (serine/threonine kinase protein B) signaling pathway in liver of high-fat diet (HFD)/Streptozotocin (STZ)-induced type 2 diabetic mice.

Methods
Groups of mice were control, untreated diabetic mice, diabetic mice treated with various doses (400, 200, 100 mg/kg) of methanolic and aqueous extract of A. annua and metformin for four weeks. Type 2 diabetes was produced by feeding high-fat diet following injection of low dose of STZ. After experiment duration all mice were sacrificed and blood glucose, insulin, homeostasis model assessment of insulin resistance index (HOMA-IR), index of insulin sensitivity index (ISI) were detected and liver tissues were isolated for to detect m-RNA expression of PI3K and Akt.

Results
Extracts of aqueous and methanolic this plant markedly reduced hyperglycemia, hyperinsulinemia, HOMA-IR and elevated ISI in diabetic group in comparison with un-treated diabetic mice. In addition, they could enhance the expression of AKt and PI3K m-RNA in liver tissues in diabetic mice.

Conclusions

Artemisia annua extract ameliorated insulin resistance and improved insulin action in liver via the high activity of PI3K/AKt signaling pathway. So, it can be a suitable alternative treatment to synthetic antidiabetic drugs to improve insulin action in condition of type 2 diabetes.
The interpretation of animate nouns in child and adult Mandarin: from the Universal Grinder to syntactic structure
Authors: Huang Aijun , Zhang Xiaomei , Crain Stephen 
Published: March 2024

Abstract
Using animate nouns to refer to entities in the world involves a complex interaction of ontology, cognition and language. The present study evaluates two accounts of the use of animate nouns, with Mandarin Chinese as the vehicle for testing between the competing accounts. One account was proposed by Cheng et al. (2008. How universal is the Universal Grinder? In Marjo van Koppen & Bert Botma (eds.), Linguistics in the Netherlands, 50–62. Amsterdam & Philadelphia: John Benjamins). These researchers contend that the count interpretation is basic for Mandarin animate nouns, due to a lexical blocking effect. To access the alternative, mass interpretation requires some kind of pragmatic coercion. A second account was proposed by Pelletier, based on English (1975. Non-Singular reference: Some preliminaries. Philosophia 5(4). 451–465; 2012. Lexical nouns are both +MASS and +COUNT, but they are neither +MASS nor + COUNT. In Diane Massam (ed.), Count and mass across languages, 9–26. Oxford: Oxford University Press). We extend this account to Mandarin animate nouns, proposing that they are encoded in the mental lexicon with both a count sense and a mass sense. To adjudicate between the accounts, we conducted four experiments that were designed to assess the interpretation assigned to animate nouns by Mandarin-speaking children and adults. The experimental conditions manipulated both the syntactic structures of the sentences and the non-linguistic contexts in which those sentences were presented. The experimental findings support our proposal that both mass and count interpretations of animate nouns are available to children and adults when sentences are presented in contexts that are congruent with these interpretations. The findings also suggest that syntactic structure is an even more critical factor in determining the interpretation that is assigned to animate nouns in Mandarin.
On theoretical and numerical analysis of fractal--fractional non-linear hybrid differential equations
Authors: Shafiullah  , Shah Kamal , Sarwar Muhammad , Abdeljawad Thabet 
Published: March 2024

Abstract
Recently, fractals and fractional calculus have received much attention from researchers of various fields of science and engineering. Because the said area has been found applicable in modeling various real-world processes and phenomena. Hybrid differential equations (HDEs) play significant roles in mathematical modeling of various processes because the aforesaid equations incorporate different dynamical systems as specific cases. For instance, it is possible to model and describe non-homogeneous physical phenomena on using the said equations. Therefore, this research work is concerned with studying a class of nonlinear hybrid fractal–fractional differential equations. We develop the existence result for the qualitative study using a hybrid fixed point theorem. For the mentioned goal, a fixed point theory for the product of two operators is applied to deduce appropriate conditions for the existence of exactly one solution. Additionally, the stability result based on Ulam–Hyers is also deduced. The said stability results play an important role in numerical investigations. In addition, a numerical method based on Euler procedure is utilized to approximate the solution of the proposed problems. Various computational test problems are given to demonstrate the results. Also, using various fractal–fractional order values, several graphical presentations are given for the examples. The concerned analysis will help in investigating many real-world problems modeled using HDEs with fractal–fractional orders in the near future.
Numerical investigations on constitutive model parameters of HRB400 and HTRB600 steel bars based on tensile and fatigue tests
Authors: Zhu Hanbo , Deng Jibing , Zhuang Mei-Ling , Sun Chuanzhi , Gao Li , Shao Yuefeng , Wang Mingsen , Wang Youzhi , Dong Yao-Rong , Tong Lei 
Published: March 2024

Abstract
In recent years, HRB400 and HTRB600 steel bars have become the mainstream standard reinforcing steel used in concrete structures in China. However, significant controversy still exists regarding the selection of material constitutive models and the determination of model parameters for buckling, fatigue, hysteresis, and other material characteristics. In this article, an automated process of multi-parameter calculation of the constitutive model for reinforcing steel – simulation accuracy evaluation of the constitutive model – selection of the constitutive model of reinforcing steel is established based on the hybrid programming method using MATLAB and OpenSees software. First, tensile and low-cycle fatigue tests were carried out on HRB400 and HTRB600 steel bars. Second, based on the constitutive model in OpenSees software and the skeleton curve and characteristics such as yielding, fatigue, and hysteresis, the constitutive model parameters of HRB400 and HTRB600 steel bars are determined using indirect and direct fitting methods. Finally, the five similarity parameters of the simulated normalized cumulative hysteretic energy dissipation coefficient are compared with the test results. The results indicate that the simulation accuracy of the Reinforcing Steel model exceeds 72%, which is higher than other four models, making it the best choice for reinforcing steel in numerical simulation.
Incredible electrochemical performance of ZnWO4/PANI as a favorable electrode material for supercapacitor
Authors: Padmanaaban Sastipriyaa , Kakkad Vasudevan Yadhukrishnan , Viswanathan Raja , Jose Sujin P. , Chellasamy Gopinathan 
Published: March 2024

Abstract
ZnWO4/PANI was synthesized through the in-situ polymerization technique, revealing the wolframite monoclinic phase in its XRD pattern. The distinctive morphology of ZnWO4/PANI observed in the SEM image, exhibits enhanced redox sites, thereby improving its electrochemical performance. Cyclic voltammetry and galvanostatic charge-discharge studies confirm the pseudocapacitive behavior of ZnWO4/PANI, showcasing an impressive capacitance of 908 F g−1 at 1 A g−1 in 1 M KOH, along with a capacitive retention of 94 % over 5000 cycles. The robust conductivity of PANI and the narrow ion transport channels along with multiple oxidation states of ZnWO4 contribute to the higher specific capacity, guiding the movement of electrons and ions. This study suggests a synergistic effect in ZnWO4/PANI, resulting in remarkable electrochemical performance enhancements.
Spatiotemporal dynamics of successive activations across the human brain during simple arithmetic processing
Authors: Pinheiro-Chagas Pedro , Sava-Segal Clara , Akkol Serdar , Daitch Amy , Parvizi Josef 
Published: March 2024

Previous neuroimaging studies have offered unique insights about the spatial organization of activations and deactivations across the brain, however these were not powered to explore the exact timing of events at the subsecond scale combined with precise anatomical source information at the level of individual brains. As a result, we know little about the order of engagement across different brain regions during a given cognitive task. Using experimental arithmetic tasks as a prototype for human-unique symbolic processing, we recorded directly across 10,076 brain sites in 85 human subjects (52% female) using intracranial electroencephalography (iEEG). Our data revealed a remarkably distributed change of activity in almost half of the sampled sites. Notably, an orderly successive activation of a set of brain regions - anatomically consistent across subjects- was observed in individual brains. Furthermore, the temporal order of activations across these sites was replicable across subjects and trials. Moreover, the degree of functional connectivity between the sites decreased as a function of temporal distance between regions, suggesting that information is partially leaked or transformed along the processing chain. Furthermore, in each activated region, distinct neuronal populations with opposite activity patterns during target and control conditions were juxtaposed in an anatomically orderly manner. Our study complements the prior imaging studies by providing hitherto unknown information about the timing of events in the brain during arithmetic processing. Such findings can be a basis for developing mechanistic computational models of human-specific cognitive symbolic systems.Significance statementOur study elucidates the spatiotemporal dynamics and anatomical specificity of brain activations across >10,000 sites during arithmetic tasks, as captured by intracranial EEG. We discovered an orderly, successive activation of brain regions, consistent across individuals, and a decrease in functional connectivity as a function of temporal distance between regions. Our findings provide unprecedented insights into the sequence of cognitive processing and regional interactions, offering a novel perspective for enhancing computational models of cognitive symbolic systems.
Evolution of Regulatory Governance for Human Research in Costa Rica
Authors: Ramírez Karol 
Published: March 2024

Regulatory governance of human research derives from historical abuses of people participating in health related and non-health relates studies. Costa Rica was no exception and nowadays counts with a Regulatory Law of Biomedical Research (Law 9234) that guarantees the protection of research participants’ human rights. The aim of this narrative review is to overview the gradual development and state of the art of protections and oversight of research with humans in Costa Rica. A recapitulation of why regulatory governance for biomedical human research was enacted in 2014 will be discussed. Even so, there is no legal requirement in Costa Rica, as in other developing nations, for non-health related protocols with human participants, to undergo the scrutiny of research boards. Nonetheless, even before Law 9234 was passed, the University of Costa Rica made efforts to compel compliance with research ethics when studying humans. Therefore, another objective is to review the current ethical guidelines dictated by the University of Costa Rica and Scientifical Ethics Committee of the University of Costa Rica to conduct responsible human research. The University of Costa Rica’s institutional regulatory framework on human research, can serve as a model to other national and international institutions from developing nations, where ethical assessment of sociocultural research is relatively neglected, compared to the review of biomedical and clinical studies.
A szociálisprobléma-megoldás és a szorongás jellemzői perfekcionista és nem perfekcionista serdülők körében – egy longitudinális vizsgálat eredményei
Authors: Kasik László , Gál Zita 
Published: March 2024

Háttér és célkitűzésekA maladaptív perfekcionizmussal jellemzett serdülők szociálisprobléma-megoldásának egyik igen fontos jellemzője a problémához való negatív viszonyulás, illetve a problémahelyzetből való minél gyorsabb kilépés, ha úgy érzékelik, megoldásuk nem felel meg maximálisan az általuk vagy a környezetük által megfogalmazott elvárásoknak. A kétéves (2021–2022) követéses vizsgálat első mérési pontján 11–12 éves és 16–17 éves diákok (N2021 = 305, N2022 = 290) körében vizsgáltuk, milyen arányban fordul elő körükben adaptív és maladaptív perfekcionista, milyen különbség azonosítható kortársakkal kapcsolatos problémáik megoldásában, bevonva az elemzésbe a szorongást is, mivel ennek szerepe az elkerülő viselkedésben és főként a maladaptív perfekcionizmusban jelentős.MódszerA szociálisprobléma-megoldás jellemzőit a Social Problem-Solving Inventory–Revised (D’Zurilla és mtsai, 2002), az állapot- és a vonásszorongást a State–Trait Anxiety Inventory for Children (Sipos és mtsai, 1978) kérdőívvel vizsgáltuk. A perfekcionizmust az Almost Perfect Scale Revised (Slaney és mtsai, 2001) és az Frost Multidimensiol Perfectionism Scale (Frost és mtsai, 1990) eszközzel tártuk fel, melyekkel együttesen a személyes, a környezettől származó és külön a szülői elvárások, a kételkedés, a hibázástól való félelem, a megfelelés hiányának érzése és a rendezettség, rendszeretet jellemzői azonosíthatók.EredményekMindkét évben közel hasonló a nem perfekcionisták, az adaptív és a maladaptív perfekcionisták aránya, mely arányok egy év elteltével nem változtak, és mindkét életkorban a perfekcionisták harmada a maladaptív perfekcionizmus jeleit mutatja. A maladaptív perfekcionistákra jellemző legnagyobb mértékben a negatív problémaorientáció és az elkerülő viselkedés, utóbbi – főként az idősebbeknél – a vonás- és állapotszorongással és a szülői kritikával együtt markáns hatással bír a maladaptív perfekcionista diákok személyes elvárásaira és a megfelelés hiányának érzésére.KövetkeztetésekEzek az eredmények többnyire alátámasztják a külföldi kutatási adatokat, és arra hívják fel a figyelmet, hogy az iskolai nevelés során mindenképpen szükséges a jelenleginél mélyrehatóbban foglalkozni a perfekcionizmus serdülőkori megjelenésével, felismerésével, okaival, alakulásával és következményeivel, megfelelő pedagógiai eszközökkel segíteni az adaptivitás erősödését, illetve kezelése során figyelembe kell venni más területekkel való kapcsolatát. E longitudinális felmérésből is úgy látszik, a maladaptív perfekcionizmusnak a társas problémák nem hatékony megoldásával és a szorongással is egyre szorosabb a kapcsolata serdülőkorban, mely kapcsolatrendszer kevésbé hatékony életvezetést eredményezhet mind társas, mind teljesítményhelyzetekben.