Miracle-dz/UniFAR-FTUs huggingface dataset:
Experimental investigation of hydrogen insertion in copper oxide on photovoltaic performance of p‐type dye‐sensitized solar cell

Hydrogenation of photoanodes has proved to be an effective method to improve performance of n‐type dye‐sensitized solar cells (DSSCs). Based on unfavorable assumptions given by the theoretical simulations, no hydrogenation of photocathodes and its effect on the conversion efficiency of in p‐type DSSCs are reported. While the theoretical works have addressed the study of the electronic structure of hydrogenated Cu2O, our experimental work aims to highlight the features of hydrogenated Cu2O/dye interface which are critical in DSSC and still unexplored. We report the beneficial effect of hydrogen in Cu2O on anchoring of the dye leading to an improvement by 98% for JSC and thus, improving the solar energy conversion efficiency of p‐type DSSC. Even in 2% H2 atmosphere, the significant increase in JSC had demonstrated the suitability of hydrogenation in the case of p‐type semiconductors as an effective and low‐cost way to augment the efficiency of p‐DSSCs.
A generic transport model for separation of gas mixtures by glassy polymer membranes based on Maxwell–Stefan formulation

Glassy polymer membranes offer a notable advantage over rubbery membranes for separation of gas mixtures due to better diffusional molecular sieving. However, predicting the separation behaviour of the membrane system is complicated due to different coupling effects arising as a result of differences in adsorption and diffusion of permeating components. A true understanding of multicomponent transport is a key step in the design and optimization of membrane separation processes. The conventional dual transport model fails to give a correct prediction for glassy polymer systems. Hence, the main purpose of this research was to present a transport model to reliably predict gas mixture separation via a glassy polymer membrane. The Maxwell–Stefan formulation theory was considered as a basis for development of the model because of its main advantage in which binary diffusivities can be used to describe multicomponent diffusion behaviour. The equilibrium factor was described in terms of the dual adsorption model. Two case studies were considered to validate the model prediction behaviour, i.e. CH4/CO2 and also C3H6/C3H8 separation which are two important processes in natural gas and petrochemical industries. The results obtained revealed very good agreement between the experimental and predicted selectivities using the developed transport model, while it was shown that a poor result is obtained using the conventional dual transport model. It was also shown that neither equilibrium nor kinetic interactions between permeating components can be safely ignored. However, the effect of kinetic coupling is more crucial due to the fact that the separation in glassy polymer membranes occurs based on diffusional selectivity rather than adsorption selectivity.
Impact of methylphenıdate and atomoxetıne on sleep ın chıldren wıth ADHD

Aim: Our purpose in this study is to determine the effects of methylphenidate and atomoxetine on the sleep of children with attention-deficit/hyperactivity disorder (ADHD). Methods: Eighty-one children admitted to a child psychiatric inpatient service with ADHD participated in a double-blind, crossover study in which 42 subjects received extended release methylphenidate, and 39 subjects received atomoxetine only one dose in the morning daily at least for 6 months. Kiddie Schedule for Affective Disorders and Schizophrenia for School-Age Children-Present and Lifetime Version (KSADS-PL) and Child Sleep Habits Survey (CSHS) were applied to all children. Results: There was a sleep problem in 81% (n = 34) of the patients using methylphenidate and 89.7% (n=35) of the group using atomoxetine. When we evaluated according to the CSHS cut-off score, whether having a sleep problem or sleep problems, and there was no statistically significant difference between the two groups (p> 0.05). We are not able to find significant difference between two groups in terms of bedtime resistance, sleep duration, sleep anxiety, night awakenings, parasomnia, sleep-breathing problems, and daytime sleepiness subtest and total sleep scores (p> 0.05). There was a significant difference in sub-test of the falling asleep duration. It was found that the methylphenidate group had a longer falling asleep time duration(p <0.05). Discussion: Sleep-related complaints in children diagnosed with ADHD are not uncommon in clinical practice. It is known that 25-55% of children with ADHD often report various sleep problems and in addition, more sleep problems are reported by their parents. In our study, when the total scores of CSHS filled by the family were evaluated, this rate was found to be 85%. There was no difference in the frequency of sleep problems between the group using methylphenidate and the group using atomoxetine. In our study, there was significant difference between the group using methylphenidate and the group using atomoxetine in terms of delay in falling asleep. In many studies based on both objective and subjective measurements, psychostimulant drugs have been reported to be associated with difficulty falling asleep and prolonged sleep latency. Sleep disorders are common in ADHD. It is important that child and adolescents with ADHD must be evaluated the sleep habits before medical treatment to identify the etiology of sleep disorders.
Aroma characterization of Sardinian strawberry tree (Arbutus unedo L.) honey

Gas chromatographic-mass spectrometric (GC-MS) analysis of the aroma fraction isolated from several strawberry tree blossom honey samples showed a marked predominance of norisoprenoids. Some were identified or tentatively identified as C 9 , C 10 , and C 13 compounds. For this aspect, the honey is similar to that from another plant of the Ericaceae family, heather, but is distinguishable from it due to different concentrations of the compounds common to both and the uniqueness of several substances, whose tentative structures have been attributed with the support of GC-Fourier Transform Infrared (FTIR) spectra. Some interesting C 10 aldehyde structures are proposed. Most compounds could be interrelated in degradation processes, starting from the compounds with the highest molecular weight. Among the samples from different areas of Sardinia, there were important quantitative differences in some of the most abundant compounds.
Advances on simulation of wave-body interactions under consideration of the nonlinear free water surface

ABSTRACT The paper refers to a boundary element method (BEM) in the time domain for the simulation of wave-body interactions considering the free water surface. The approach solves the boundary integral equations for the velocity and the acceleration potential. The model of the free water surface in this approach is based on the mixed-Eulerian-Lagrangian (MEL) method. Validation results are presented for two well-studied test cases. The first validation case is dedicated to the free water surface. Here, the nonlinear wave loads on a truncated cylinder are analysed and compared with a higher-order panel method and experimental data. Second, results of a Wigley hull moving with forward speed in head waves are shown and compared with experimental results published by Kashiwagi. The validation results in both test cases generally show good agreement with published data and demonstrate the ability of BEM to investigate different types of hydrodynamic problems related to wave-body interactions.
Insufficient Higher Order Thinking Skill in Reading Comprehension Exercises of an English Language Textbook

Higher order thinking skill (HOTS) is an important outcome standard of higher education in any discipline. Accordingly, English language textbook should present higher order thinking questions to promote students’ higher order thinking skill. The aim of this research is to analyze the extent to which the higher order thinking skill (HOTS) and the indicators of reading skill are assessed in the reading comprehension exercises. This research used the descriptive analytical method of research, which refers to content analysis. The data are analyzed based on revised Bloom’s taxonomy and reading skill indicators . The findings reveal that: (1) HOTS in the reading comprehension exercises questions only includes analyzing skill and evaluating skill while creating skill is not found; and (2) the indicators of reading skill are not fully assessed from the questions in the reading comprehension exercises in English language textbook for twelfth grade students by Indonesian Ministry of Education and Culture. The textbook only assesses topic, explicit meaning, and implicit meaning indicators. Students will not achieve higher order thinking skill and reading skill excellently if they only practice reading comprehension exercises from the textbook.
Relationship between Internet Addiction and Poor Mental Health among Japanese Adolescents

Background: Internet addiction and poor mental health are two pervasive problems during adolescence. This study aimed to determine whether Internet addiction and poor mental health status exhibited a bidirectional relationship in which either variable could become a risk factor for the onset of the other. Methods: Longitudinal school-based survey with a baseline sample of 1547 students among 8 schools (10th graders) in Japan surveyed in 2015 and followed up 1 year later. The schools are located in the middle city. We assessed internet addiction using the Japanese version of the Diagnostic Questionnaire developed by Young and mental health status using the 12-item General Health Questionnaire. Regression analyses including the covariates tested whether Internet addiction was related to the onset of poor mental health among youth who had never internet addiction, and poor mental health was related to the onset of internet addiction. Results: The incidence for Internet addiction and poor mental health during one year were 22.0% and 8.8%, respectively. Multiple regression analyses showed that poor mental health (adjusted odds ratio: 2.17 [95%CI: 1.45–3.25]) promoted new onset of Internet addiction and Internet addiction (adjusted odds ratio: 2.39 [95%CI: 1.36–4.20]) also promoted new onset of poor mental health. Conclusion: Internet addiction and poor mental health status each increased the risk of onset of the other. Adolescents, their parents and schools need to take policies to use properly Internet.
Multi-model deep learning approach for collaborative filtering recommendation system

As a result of a huge volume of implicit feedback such as browsing and clicks, many researchers are involving in designing recommender systems (RSs) based on implicit feedback. Though implicit feedback is too challenging, it is highly applicable to use in building recommendation systems. Conventional collaborative filtering techniques such as matrix decomposition, which consider user preferences as a linear combination of user and item latent features, have limited learning capacities, hence suffer from a cold start and data sparsity problems. To tackle these problems, the research direction towards considering the integration of conventional collaborative filtering with deep neural networks to maps user and item features. Conversely, the scalability and the sparsity of the data affect the performance of the methods and limit the worthiness of the results of the recommendations. Therefore, the authors proposed a multi-model deep learning (MMDL) approach by integrating user and item functions to construct a hybrid RS and significant improvement. The MMDL approach combines deep autoencoder with a one-dimensional convolution neural network model that learns user and item features to predict user preferences. From detail experimentation on two real-world datasets, the proposed work exhibits substantial performance when compared to the existing methods.
3D printed fiber sockets for plug and play micro-optics

Integrating micro-optical components at the end facet of an optical fiber enables compact optics to shape the output beam (e.g. collimating, focusing, and coupling to free space elements or photonic integrated circuits). However, the scalability of this approach is a longstanding challenge as these components must be aligned onto individual fiber facets. In this paper, we propose a socket that enables easy slotting of fibers, self-alignment, and coupling onto micro-optical components. This integrated socket can be detached from the substrate upon fiber insertion to create a stand-alone optical system. Fabrication is done using nanoscale 3D printing via two-photon polymerization lithography onto glass substrates, which allows multiple sockets to be patterned in a single print. We investigated variations in socket design and evaluated the performance of optical elements for telecom wavelengths. We obtained an alignment accuracy of ∼3.5 µm. These socket designs can be customized for high efficiency chip to fiber coupling and extended to other spectral ranges for free-form optics.
Temperature tele‐connections between the tropical and polar middle atmosphere in the Southern Hemisphere during the 2010 minor sudden stratospheric warming

Southern Hemispheric (SH) sudden stratospheric warmings (SSWs) are relatively rare compared to their Northern Hemisphere counterparts. No study has so far investigated the impacts of the SH minor SSWs on the tropical atmosphere and connection between the tropical and polar atmospheres. Here, we analyze the MERRA‐2 and ERA‐interim datasets, and Microwave Limb Sounder satellite temperature measurements to investigate the tropical and polar atmosphere tele‐connections during the SH minor SSW that occurred in 2010. Our analysis shows the strong anti‐correlation between the polar and tropical temperatures during the 2010 minor SSW in the stratosphere and mesosphere. This is the first observational study over the SH that reveals the tele‐connection between the tropical and polar middle atmospheres through the temperature during a minor SSW. We verified this tele‐connection, using simulations of the Ground‐to‐topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) model during the 2010 minor SSW. GAIA model simulations show the temperature anti‐correlation between the tropical and polar middle atmosphere and zonal wind variations. The feature of meridional circulation changes was also observed during the SSW period. Hence, the present study strongly suggests that even minor SSW in the SH can affect the meridional circulation in the middle atmosphere via planetary wave activity.
Cognitive flexibility as a predictor of subjective vitality among university students

This study aimed to identify the differences between cognitive flexibility and subjective vitality according to specialisation background (scientific and literary), gender (male and female) and the ability of cognitive flexibility as a predictor of subjective vitality. The cognitive flexibility inventory and subjective vitality scale were applied to 189 undergraduate students in Jordan. The results showed that the highest mean of cognitive flexibility dimensions belonged to alternative flexibility, whereas control flexibility came in the second rank. The results indicated that there were statistically significant differences in alternative flexibility according to specialisation background in favour of literary background students, but no significant differences were found in control flexibility, total cognitive flexibility and total score of subjective vitality. The results also indicated that there were significant differences in alternative flexibility and the total score of cognitive flexibility according to gender for males’ benefit, but no significant differences in control flexibility and the total score of subjective vitality according to gender were found. Furthermore, the subjective vitality could be predicted by cognitive flexibility. Keywords: Cognitive flexibility, subjective vitality, undergraduate students, AL-Balqa Applied University, educational psychology.
Negotiating Dual Identities: A Case Study on the Narratives of Two Myanmar Refugee Youths Living in Malaysia

This article explores the experiences of two Myanmar refugee youths, who were born and raised in Malaysia – Prince, a Rohingya boy and John, a Burmese boy – through their narratives on belonging and identity and Gee’s framework for identity analysis. Selected excerpts from the respondents’ narratives were analysed using positioning analysis. A salient aspect in the narratives of both respondents was agency to choose for themselves identities that would enable them to achieve particular goals. The narratives presented here revealed a complex weaving of two main identities: Malaysian and refugee. The analysis revealed how the respondents often chose to downplay aspects of their refugee-ness to take up a Malaysian identity, with both identities functioning as binary identities. However at other times, they also attempted to merge both into a dual or hybrid identity, illustrating that identity work involves overlapping aspects of refugee subjectivities that sometimes contradict each other. The article ends with some recommendations for more inclusive policies for refugees in Malaysia, including crafting legislation that acknowledges refugees and allowing them formal access to learning local languages and integrating with local communities.
Active Filters: A Review

Passive filters have some drawbacks which make them undesirable, such drawbacks include resonating with the system impedance, bulkiness in size, heavyweight, sensitiveness to variation of system parameters and fixed harmonic compensation among others. Active filters or active harmonic Filters (in full) overcome the shortcomings of passive filters and as such are generally preferred over their passive counterparts. This paper discusses active filters and their classifications as well as applications.
Influence of a blend of guar gum and poly(vinyl alcohol) on long term stability, and antibacterial and antioxidant efficacies of silver nanoparticles

This paper describes a detailed procedure for the synthesis of highly stable (almost for 60 days) and monodispersed silver nanoparticles (average particle size of 16 nm which changed to 42 nm only on the 60th day of standing under refrigeration) in the presence of a blend of a polysaccharide (guar gum) and a hydrophilic synthetic polymer (poly(vinyl alcohol)) where both the polymers provided synergistic effects in reduction and stabilization of incipient nanoparticles. Time dependant stability of aqueous dispersions of silver nanoparticles in various compositions of polymeric matrices was studied from UV-Vis spectroscopy, DLS and zeta potential characterization data. An FTIR spectrum and HRTEM image along with EDX results of the best optimized compositions in respect of particle size and particle size distribution of silver nanoparticles were also obtained. A study displayed how viscosity of the polymeric matrices played a vital role in the long term stabilization of aqueous dispersions of silver nanoparticles. For the first time we are reporting that silver nanoparticles synthesized by a green technique, using a blend of two highly viscous polymers, exhibited excellent stability. The aqueous dispersions of silver nanoparticles also displayed strong antibacterial and antioxidant properties. Hence our synthesized silver nanoparticles may be suitable for commercialization in future.
The effects of tourism on EU regional cohesion: a comparative spatial cross-regressive assessment of economic growth and convergence by level of development

Abstract This research explores the implications of tourism for the regional cohesion of the European Union (EU). The performance of domestic and inbound tourism is tested statistically, taking into account the regions’ level of development and both direct and spill-over effects. The study therefore addresses a subdimension of tourism economic sustainability by focussing on the distribution of its effects. Within a tourism augmented conditional convergence framework, spatial cross-regressive models are estimated using the System Generalised Method of Moments. The unbalanced panel data set mainly comes from Eurostat’s regional statistics database and covers 258 regions for the period 2000–2016. Our findings indicate that domestic tourism is a better instrument for enhancing the territorial cohesion of the EU, especially for less developed and transition regions. Inbound tourism clearly hinders the convergence of these regions and has negative direct and spill-over effects on them. Inbound tourism also acts as a drag on the economic growth of more developed neighbouring regions. Policy implications include actions to support SME competitiveness, technological development and innovation, sustainable transport and network infrastructures, training and social inclusion. These areas are thematic objectives of the EU regional policy. Particular attention should be paid to coordinating the measures implemented under them.
Light-Addressable Potentiometric Sensor with Nitrogen-Incorporated Ceramic Sm2O3 Membrane for Chloride Ions Detection

A light-addressable potentiometric sensor (LAPS) with ceramic samarium oxide (Sm2O3)-sensing membrane treated by nitrogen plasma immersion ion implantation (PIII) has been proposed for chloride ion detection. For the pure Sm2O3-LAPS, a potassium ion sensitivity of 39.21 mV/pK is obtained. With the nitrogen PIII treatment on Sm2O3-sensing membrane, the N–O peak is observed by X-ray photoelectron spectroscopy, implying the formation of positive charges, (N-O)+ and (N-O-N)+, within the Sm2O3 film. The positive charges can attract the chloride ions to react with the surface sites of OH2+, achieving a superior chloride ion sensitivity of 36.17 mV/pCl for the Sm2O3-LAPS with nitrogen PIII treatment. The LAPS structure with ceramic Sm2O3-sensing membrane can be used for future biosensing applications, especially for the potassium and chloride ions detection in serum.
Development and Preliminary Evaluation of an Instrument to Measure Readiness for Problem-Based Learning

Since its introduction in 1969 within a Canadian medical school, the use of Problem-Based Learning (PBL) has been growing in popularity. PBL can be defined broadly as a constructivist learning environment in which the focus is on experiential learning, organized around investigation, explanation and resolution of problems (Hmelo-Silver, 2004). In the approach, students learn content and thinking strategies by working on problems in small collaborative groups. A typical PBL session commences with an ill-defined problem. Students must then work together in small groups to address the issues associated with the problem and to address relevant gaps in their own knowledge to arrive at a suitable solution, with a facilitator on hand to guide the students through the process. Apart from the content-related knowledge and skills that students acquire, the process is intended to promote the development of other skills such as critical thinking and problem-solving, as well as both self-directed and collaborative learning competencies (Lieux, 2001; Schmidt, Vermeulen & Van Der Molen, 2006).