Miracle-dz/UniFAR-FTUs huggingface dataset:
Curie-supported accelerated curing by means of inductive heating – Part I: Model building

ABSTRACT Accelerating the polymerisation of adhesives has been a long-established field of research in context of adhesive bonding technology as long curing times – sometimes up to days – represent a decisive disadvantage in contrast to most mechanical joining techniques like riveting or screwing. In addition to, e.g., curing via UV, microwave or IR radiation, electromagnetic induction represents a promising solution for speeding up the cure of polymers. With this method, adhesively bonded components are subjected to an alternating electromagnetic field (EMF) that induces heat in EMF-sensitive materials, e.g., steel or aluminium. If intrinsic EMF-sensitivity of the materials to be bonded is not given, different types of susceptors like meshes, fibres or particles are added to the adhesive in order to be heated inductively and thus cure the adhesive from the inside. Recent research has focused on a special type of susceptors, so-called Curie particles (CP), which can only be heated inductively up to their specific Curie temperature (T c) at which CP-induced heating automatically stops. As a result, a curing process is created that eliminates the need for external temperature monitoring while simultaneously preventing overheating of the bond. As underlying curing kinetics – most importantly polymerisation enthalpy and curing time – significantly differ depending on the considered adhesive, induction times needed to achieve full cure must currently be determined through costly preliminary investigations on an experimental level. Thus, to contribute for a more efficient and controllable bonding process, the present study aimed at developing a numerical model based on the Finite Element Method (FEM) and capable of predicting the curing degree α in dependency of curing temperature profiles T Cure(t) and the CP content c cp. For this purpose, the curing kinetics of two fundamentally different 2K epoxy adhesives were linked to a transient heat flow simulation based upon experimentally determined heat loads. The validation of the developed FEA technique was successfully carried out using the example application of inductively cured large-scale Glued-in rod (GiR) specimens, whereby experimentally determined temperature profiles showed excellent agreement with the numerical predictions. The present paper focused on presenting preliminary experimental work as well as all analytical methods implemented for the numerical modelling.
Gender, Age and Anxiety as Predictors of Nomophobia in University Students

Abstract. Mobile technologies have become one of the important parts of human life. Smartphones have become the most used technological devices of daily life, with newly added features every day. However, intense and non-functional use of these devices may cause problems. Nomophobia, which is defined as the fear of being without a mobile phone or being unable to be online, has begun to take place in literature as a current phenomenon. The present study discusses the variables of gender, age and anxiety as predictors of nomophobia in university students since the phenomenon is common especially in young people. The study group consists of 372 university students. Personal Information Form, Beck Anxiety Scale and Nomophobia scale were used as data collection tools in the study. Pearson correlational analysis and hierarchical regressions were conducted for data analysis. According to the results obtained from the study, anxiety total scale and subjective anxiety and somatic symptoms sub-dimensions were found to be positively associated with nomophobia. It was found that gender and subjective anxiety subdimension of anxiety scale significantly predicted nomophobia. On the other hand, it was found that the variable of age did not predict nomophobia significantly. The data obtained were discussed in the light of literature and suggestions were made to researchers.
Symmetry-based invariants of nanostructures and their effect on edge states of carbon nanotubes

Abstract The Graovac–Pisanski index is a symmetry-based version of the well-known Wiener topological index. The aim of this paper is to compute this invariant for both armchair and zig-zag polyhex carbon nanotubes marking important theoretical considerations on their relative stability and the effects of the edge states. We also compare the Graovac–Pisanski and Wiener descriptors and present some open questions.
The relationships of motivation, service quality, and behavioral intentions for gastronomy festival: the mediating role of destination image

ABSTRACT This research aims to examine the relationships between motivation, festival service quality (FSQ), destination image, and behavioral intention within the scope of gastronomy festivals. In accordance with this purpose, a theoretical model which is covering the interactions between these variables is proposed. The model was tested with the analysis of data obtained from 396 tourists who came to GastroAntep festival. The findings revealed that FSQ had a strong effect on behavioral intention and destination image. On the other hand, it has been determined that the destination image has a mediating role in the relationship between FSQ and behavioral intention.
TRIM22 genotype is not associated with markers of disease progression in children with HIV-1 infection

Supplemental Digital Content is available in the text Objective: Untreated perinatal HIV-1 infection is often associated with rapid disease progression in children with HIV (CWH), characterized by high viral loads and early mortality. TRIM22 is a host restriction factor, which directly inhibits HIV-1 transcription, and its genotype variation is associated with disease progression in adults. We tested the hypothesis that TRIM22 genotype is associated with disease progression in CWH. Design: ART-naive CWH, aged 6–16 years, were recruited from primary care clinics in Harare, Zimbabwe. We performed a candidate gene association study of TRIM22 genotype and haplotypes with markers of disease progression and indicators of advanced disease. Methods: TRIM22 exons three and four were sequenced by Sanger sequencing and single nucleotide polymorphisms were associated with markers of disease progression (CD4+ T-cell count and HIV viral load) and clinical indicators of advanced HIV disease (presence of stunting and chronic diarrhoea). Associations were tested using multivariate linear and logistic regression models. Results: A total of 241 children, median age 11.4 years, 50% female, were included. Stunting was present in 16% of participants. Five SNPs were analyzed including rs7935564, rs2291842, rs78484876, rs1063303 and rs61735273. The median CD4+ count was 342 (IQR: 195–533) cells/μl and median HIV-1 viral load 34 199 (IQR: 8211–90 662) IU/ml. TRIM22 genotype and haplotypes were not associated with CD4+ T-cell count, HIV-1 viral load, stunting or chronic diarrhoea. Conclusion: TRIM22 genotype was not associated with markers of HIV disease progression markers or advanced disease in CWH.
The Effect of Stress on IL-17 Levels in an OVA-immunized Mice Allergic Model

Objective: Evaluate the effect of stress on eosinophil count, levels of cortisol and levels of IL-17 in an OVA-immunized Mice Allergic model. Method: Eight teen female BALB/c mice divided into 3 groups. Negative control in group 1, Allergy control in group 2 group received ovalbumin sensitization only and stress treatment in Group 3 received ovalbumin sensitization and stress using water-immersion stress test on day 24th, 26th and 30th. All mice are terminated on 31st day, lungs and blood sample are collected and measured for eosinophil count microscopically, level of cortisol and level of IL-17 using ELISA. Results: Mean eosinophil count for group 1 is 0.48 per high power field (hpf), group 2 is 2,13 hpf, group 3 0.8 hpf. Mean cortisol level for group 1 is 9.13 ng/mL, group 2 is 10.85 ng/mL, group 3 25.47 ng/mL. Mean IL-17 level for group 1 66.71 pg/mL, group 2 is 22.36 pg/mL, group 3 is 26.38 pg/mL. Conclusion: The number of eosinophils in the allergy control in group 2 (2.13/hpf) was significantly higher than the negative control in group 1 (0.48/hpf) (p = 0.004). Levels of cortisol in the stress treatment in group 3 (25.47 ng/mL) were not significantly different from the allergy control in group 2 (10.85 ng / mL) (p = 0.180). Levels of IL-17 in the stress treatment in group 3 (26.38 pg / mL) did not differ significantly from the allergy control in group 2 (22.36) (p = 0.394).
Activated carbon from bacterial cellulose as an effective adsorbent for removing dye from aqueous solution

ABSTRACT Novel activated carbon (AC) derived from bacterial cellulose (BC-AC) was produced by phosphoric acid activation at a carbonization temperature of 500 °C. BC-AC possesses mesoporous structures of 2.3 nm in diameter, porosity of 1.0 cm3/g and surface area of 1734 m2/g with high thermal stability between 100 and 500 °C. BC-AC could be used as an effective adsorbent for removing methylene blue (MB) from aqueous solutions with the maximum adsorption capacity of 505.8 mg/g. BC-AC presented physisorption and the adsorption of MB was most likely to be a monolayer adsorption. The Redlich–Peterson model displayed the best fit with the experimental data.
An international intercomparison of stable carbon isotope composition measurements of dissolved inorganic carbon in seawater

We report results of an intercomparison of stable carbon isotope ratio measurements in seawater dissolved inorganic carbon (δ13C‐DIC) which involved 16 participating laboratories from various parts of the world. The intercomparison involved distribution of samples of a Certified Reference Material for seawater DIC concentration and alkalinity and a preserved sample of deep seawater collected at 4000 m in the northeastern Atlantic Ocean. The between‐lab standard deviation of reported uncorrected values measured with diverse analytical, detection, and calibration methods was 0.11‰ (1σ). The multi‐lab average δ13C‐DIC value reported for the deep seawater sample was consistent within 0.1‰ with historical measured values for the same water mass. Application of a correction procedure based on a consensus value for the distributed reference material, improved the between‐lab standard deviation to 0.06‰. The magnitude of the corrections were similar to those used to correct independent data sets using crossover comparisons, where deep water analyses from different cruises are compared at nearby locations. Our results demonstrate that the accuracy/uncertainty target proposed by the Global Ocean Observing System (±0.05‰) is attainable, but only if an aqueous phase reference material for δ13C‐DIC is made available and used by the measurement community. Our results imply that existing Certified Reference Materials used for seawater DIC and alkalinity quality control are suitable for this purpose, if a “Certified” or internally consistent “consensus” value for δ13C‐DIC can be assigned to various batches.
Transformation and endurance of Indigenous hunting: Kadazandusun‐Murut bearded pig hunting practices amidst oil palm expansion and urbanization in Sabah, Malaysia

Land‐use change and political–economic shifts have shaped hunting patterns globally, even as traditional hunting practices endure across many local socio‐cultural contexts. The widespread expansion of oil palm cultivation, and associated urbanization, alters land‐use patterns, ecological processes, economic relationships, access to land and social practices.In particular, we focus on the socio‐ecological dynamics between Kadazandusun‐Murut (KDM) hunters in Sabah, Malaysian Borneo, and bearded pigs (Sus barbatus;Malay: ‘babi hutan’), the favoured game animal for non‐Muslim communities throughout much of Borneo. We conducted 38 semi‐structured interviews spanning over 50 hr with bearded pig hunters, asking them about contemporary hunting practices and motivations, changes in hunting practices, changes in pig behaviour, and patterns of animal protein consumption in village and urban contexts.Amidst widespread land‐use change, primarily driven by oil palm expansion, respondents reported substantially different characteristics of hunting in oil palm plantations as compared to hunting in forests. Additionally, 17 of 38 hunters—including 71% (10/14) of hunters who started hunting before 1985, compared to 26% (6/23) of hunters who started hunting in 1985 or later—mentioned that bearded pigs are behaving in a more skittish or fearful way as compared to the past. Our respondents also reported reductions in hunting frequency and wild meat consumption in urban contexts as compared to rural contexts.However, despite these substantial changes in hunting and dietary practices, numerous KDM hunting motivations, hunting techniques and socio‐cultural traditions have endured over the last several decades. For some, bearded pig meat remains deeply tied to food provision, gifting and sharing customs, and cultural components of celebrations and feasts.Oil palm has cultivated new hunting practices that differ from those in forests, and has potentially contributed to altered bearded pig behaviour due to increased hunting accessibility. Together, oil palm and urbanization are helping reshape the KDM‐bearded pig socio‐ecological system. In light of these reshaped connections, we recommend location‐specific management approaches that ensure fair access to the dietary and social benefits of bearded pig hunting while preserving the critical conservation needs of bearded pig populations and habitat. These twin goals are particularly urgent given the confirmed outbreak of African Swine Fever (ASF), and mass deaths of domestic pigs and wild bearded pigs, in Sabah and Kalimantan in 2021.A free Plain Language Summary can be found within the Supporting Information of this article.
Encountering American higher education: First-year academic transition of international undergraduate students in the United States

This study explored how international undergraduate students perceive their academic transition into American higher education. Schlossberg’s (1984) 4S Transition Theory served as the framework for exploring what academic challenges, if any, international students experience during their first year of undergraduate studies in a new cultural and educational setting. The findings revealed that students’ academic transition into the U.S. higher education was characterized by difficulties in understanding the academic system of their new environment; overcoming educational, instructional and pedagogical differences; building social relationships with domestic students; and receiving the support necessary from the appropriate institutional services.
Effect of Coated Ammonium Dinitramide on the Properties of Nitrate-ester Plasticized Polyether Solid Rocket Propellants

Several industrial and research types of nitrate-ester plasticized polyether (NEPE) solid propellants were experimentally analyzed. In general, their compositions differed in the mass fraction of ammonium dinitramide (ADN), which was used as a promising highly energetic filler, as an alternative to ammonium perchlorate (AP). ADN exhibits high performance, low signature and non-polluting characteristics. The propellant composition without ADN, but with AP, was used as the reference. The microstructure and granularity distribution of the uncoated and coated ADN particles were experimentally analyzed. It was found that uncoated ADN particles exhibited irregular shape, while the ADN particles after coating are spherical. Because of their irregular shape, uncoated ADN particles caused inferior processability of the propellant slurry when added to the propellant formulation. Consequently, the NEPE propellants with coated ADN were studied in further detail. The rheological properties, energetic properties, mechanical sensitivities and combustion properties (burning rate and pressure exponent) of the NEPE propellants with coated ADN were studied and compared with the reference NEPE propellant. The addition of ADN particles to the propellant formulations increased the standard theoretical specific impulse and heat of explosion of the propellants, while decreasing the density. The propellants containing ADN particles were much more sensitive to impact and friction compared to the reference sample. Moreover, increasing the ADN mass fraction in the propellant formulation can significantly affect the combustion behaviour and increase the burning rate and pressure exponent compared to of the reference Central European Journal of Energetic Materials ISSN 1733-7178; e-ISSN 2353-1843 Copyright © 2018 Institute of Industrial Organic Chemistry, Poland 591 Effect of Coated Ammonium Dinitramide on the Properties of Nitrate-ester. Copyright © 2018 Institute of Industrial Organic Chemistry, Poland formulation. However it appears that ADN is a very promising candidate as a new energetic material in compositions of NEPE propellants, although several important questions concerning ADN’s suitability, especially in the context of its sensitivity to friction and impact, remain to be answered.
Simulations of globular clusters within their parent galaxies: Metallicity spreads and anomalous precursor populations

Recent observations of globular clusters (GCs) suggest that elemental abundance variations may exist between first-generation (1G) stars. We propose that metal abundance (‘metallicity’) spreads within GC forming giant molecular clouds (GMCs) can influence the iron abundances of future cluster members. To investigate this, we use original hydrodynamical simulations to model GMC formation in a high redshift dwarf galaxy. Our simulations self-consistently model physical processes such as stellar feedback, dust formation and destruction, and molecular gas formation on dust grains, making them well suited to the study of GMC formation. We conclude that iron abundance variations in GMCs are due to the merging of gas clumps and self-enrichment processes. The metallicity dispersions of GC forming clumps is ∼0.1 dex, reflecting a growing number of studies that claim a non-zero dispersion within GCs. The galactic gas fraction is a key parameter for the formation of clumps and the metallicity ‘floor’ observed for both Galactic and extragalactic GCs are associated with the parent galaxy’s capacity to form massive GMCs. Finally, we argue that GMCs have the potential to trap surrounding metal-poor galactic disc stars, which we interpret as a precursor population (0G). These low metallicity stars are representative of the [Fe/H] value of the host dwarf and thus the chemistry of this 0G may be a fossilized record of the parent galaxy. These results depend on the initial metallicity and radial gradient of the galaxy, the threshold gas density for star formation, and the star formation prescription.
Relationship of Academic Self-Management and Academic Anxiety Towards Academic Achievement of First Year Students In Institut Teknologi Bandung

This study aims to find the relationship of academic self-management and academic anxiety on academic achievement in first-year students at Institut Teknologi Bandung with quantitative methods on 111 samples of the first-year students. The results of the regression analysis showed that academic self-management and academic anxiety contributed 21.4% of students' academic achievement as measured by the Grade Point Average (GPA). Academic anxiety has a significant negative relationship to academic achievement, moreover, this study also found a significant difference in academic anxiety between students with low, moderate, and high academic achievement. Students with higher academic achievement have lower academic anxiety and vice versa. In first-year students at Institut Teknologi Bandung, the highest component of academic anxiety is the patterns of anxiety-engendering mental activity which indicates low student confidence and self-esteem. The findings of this research can be the basis for PeKa TPB Ministry of KM ITB in designing the character development program for the first-year students.
Atmospheric PM2.5, Total PCDD/Fs-WHO2005-TEQ Level and Wet Deposition: Cases of Jinan and Weihai Cities, China

The atmospheric PM2.5, total PCDD/Fs-WHO2005-TEQ concentrations, PM2.5-bound total PCDD/Fs-WHO2005-TEQ content, gas-particle partitioning and wet deposition of PCDD/Fs in Jinan and Weihai, from 2015 to 2017, were investigated, respectively. Furthermore, a regression analysis of the air quality index (AQI) and total PCDD/Fs-WHO2005-TEQ concentrations was studied as well. From 2015–2017, the three-year average PM2.5 concentrations in Jinan and Weihai were 76.1 and 32.9 µg m–3, respectively. The three-year average total PCDD/Fs-WHO2005-TEQ concentrations in Jinan and Weihai were 0.0866 and 0.0396 pg-WHO2005-TEQ m–3, respectively, indicating that maritime climate regulation contributes to the spread of pollutants. The three-year average fraction of gas phase total PCDD/Fs-WHO2005-TEQ concentrations in spring, summer, autumn, and winter in Jinan were 26.1%, 63.8%, 30.5% and 4.62%, respectively; while, those in Weihai were 30.7%, 74.5%, 44.4%, and 8.41%, respectively. In 2016, the annual wet deposition fluxes in Jinan and Weihai were 1288 and 483 pg WHO2005-TEQ m–2 year–1, respectively. The annual scavenging ratios of total PCDD/Fs-WHO2005-TEQ were 33080 and 30870 in Jinan and Weihai, respectively. The total concentration of PCDD/Fs-WHO2005-TEQ increased with an increase of AQI and showed a positive correlation; the R2 values of three years (2015, 2016, and 2017) were 0.873, 0.847, and 0.744, respectively. Therefore, knowing the AQI value, the total concentration of PCDD/Fs-WHO2005-TEQ in the ambient air can be roughly estimated using a regression equation.
Assessment Agro-Physiological Traits Response of Green Bean to Different Level of Nitrogen, Potassium and Zinc Fertilizers

Nutritional management is an important factor in the success of crop production. In order to evaluate different level of nitrogen, potassium and zinc fertilizers on agro physiological characteristics of green bean a field experiment was conducted as split-plot based randomized complete block design in three replications, in Varamin university field research during 2011. The main plot included urea fertilizer at three levels (n1=250, n2=300, n3=350 kg.ha-1). The sub plots consisted b1 (120 kg K.ha-1 from potassium sulfate), b2 (Zn: foliar application of zinc solution with concentration 6 gr.l-1) and b3 (K+Zn =120 kg K.ha-1 and zinc foliar application with concentration of 6 gr.l-1). The results showed that nitrogen uptake increased green bean yield. The interaction between nitrogen level and K and Zn applications was observed that the highest nitrate uptake was obtained that N3B3 treatment. The highest radiation use efficiency (RUE) and chlorophyll were obtained from 350 kg.ha-1 urea with application of (K*Zn fertilizers) treatment. The highest pod yield (4306.2 kg.ha-1) was presented by application of 250 kg.ha-1 urea with K and Zn fertilizers, however the lowest pod yield (2298 kg.ha-1) was observed at 350 kg.ha-1 urea with K. The results of this experiment showed that the Zn-foliar application increased all features in bean and also, reduced nitrate fertilizer rate without reduction in more plant characteristics.