Miracle-dz/UniFAR-FTUs huggingface dataset:
The relationship between transformational leadership and work engagement. Moderated mediation roles of psychological ownership and belief in just world

Purpose This study aims to investigate the mediating and moderating effects of psychological ownership and belief in just world in the relationship between transformational leadership and work engagement. Design/methodology/approach The data were collected from 183 lecturers who teach in an Indonesian university. The questionnaires covered transformational leadership, psychological ownership, belief in just world and work engagement. The collected data were examined with structural equation model analysis. Findings The results demonstrated a significant moderated mediation index, which indicated that the relationship between transformational leadership and work engagement is mediated by psychological ownership and is moderated by belief in just world. Practical implications To achieve higher work engagement, organizations should increase employees’ feelings of ownership and boost just world belief. Originality/value The present study offers new insight on how personality trait plays a moderating role in the relationship between transformational leadership and work engagement.
The use of remotely sensed data to analyse spatial and temporal trends in vegetation patchiness within rehabilitated bauxite mines in the Darling Range, W.A.

The assessment of rehabilitation success is time consuming and costly for bauxite miners because large areas of land (~550 ha per year) are involved. In some cases, rehabilitation results in patches of bare or sparsely vegetated soil. This study uses remote sensing imagery to evaluate the growth of vegetation in rehabilitated bauxite mines in the Darling Range, W.A. This work has five aims, which are to (1) compare vegetation biomass within rehabilitated areas and nearby native forest; (2) analyse temporal changes in vegetation growth within the selected rehabilitated areas, in particular rehabilitated areas with patches of bare soil; (3) compare vegetation growth preand postmining; (4) identify the best type of remotely sensed data for this particular study area, and (5) develop an index, which can classify the degree of vegetation patchiness within rehabilitated mine sites. This information will enable rehabilitation workers to identify patches in rehabilitated areas that may require further remediation. The study used RADARSAT, nine years of Normalised Difference Vegetation Index (NDVI) maps (extracted from LANDSAT TM multivariate imagery and Quickbird imagery) and aerial photographs to evaluate forty-seven ~1 ha study sites. Image and map analyses were conducted mainly using ESRI’s software ArcGIS 8.3 and ER Mapper 6.4. Ground truthing was carried out to confirm and recognise the causes of bare patches within the rehabilitated mine sites. A rehabilitated area is classified as a “patchy rehabilitated area” if one or more patch of bare soil is visible in the images (aerial photographs and Landsat TM) and persisted over several years. The study found that the four-year-old rehabilitated areas have higher NDVI values (mean NDVI 47.1 ±4.4) than native forest (mean NDVI 35.1 ±2.9). There is a positive relationship between vegetation index values and time since rehabilitation for nonpatchy and patchy rehabilitated areas. After approximately 8 to 10 years of plant growth, in rehabilitated areas, NDVI becomes saturated causing a plateau in the temporal trend. For non-patchy rehabilitated areas, the range of NDVI values decreases with time. For patchy rehabilitated areas, the range of NDVI values increases or stays high with time, until the bare patches become vegetated. This difference in behaviour
Three essays about health progress and economic development in Africa

This dissertation aims at opening the black box of African health progress during and following the colonial period. It does so by making three contributions to the literature on health policies, health standards and fertility patterns, in the 20th century’s Africa. The first chapter compares the colonial strategies for health policies’ provision and other colonial policies in former FrenchWest Africa between 1904 and 1958. Drawing on colonial archives and existing data, it gathers a unique dataset containing colonial inputs at the colonial district level: medical and educational staff, vaccinations, public work’s expenses and conscription. There was a very general strategy as regards to the provision of colonial services. In this context, the allocation of health inputs was specific in two dimensions only. First, medical staff was used as a means of colonial “coverage”. Second, there is a long-lasting effect of prevention leading to a “diversification” strategy for all health investments. Away from these specificities, the common factors to all investments have to do with the colonial administration’s preference for path dependence, investments’ returns to scale, the diseases’ contagion risk and the demand for colonial services. This work also suggests that there was no specialization of districts in one type of investments. The second chapter of this thesis looks at the relationship between adult height and underfive mortality in the context of the “double African Paradox” in West Africa. Africans are relatively tall in spite of extremely unfavorable income and disease environments. Moreover, their height stature decreased since the 1960’s despite improving health conditions and a fall in under-five mortality rates. This study points to selective mortality, by bringing forward a positive correlation between mothers’ height and mortality in the 1980’s West Africa. It then estimates a new model of height differential between survivors and deceased. Results imply that selective mortality could be large enough to mask significant height increases in the 1980’s West Africa. In high mortality contexts, anthropometric studies should discuss mortality levels and trends. More generally, results imply that the issue of selective mortality is crucial to assess the long-term impact of most health interventions. The third chapter tackles another specificity of African health: fertility and gender preferences. It develops a new indicator of gender preferences based on birth spacing. Applying it to Africa provides evidence that son preference is strong and increasing in North Africa, whereas Sub- Saharan African countries display a preference for variety or no preference at all. Traditional family systems accurately predict the nature of gender preferences, while religion does not. Last, the magnitude of preferences is stronger for wealthier and more educated women.
Visual Psychophysics and Physiological Optics Visual Acuity , Crowding , and Stereo-Vision Are Linked in Children with and without Amblyopia

METHODS. We measured the covariation between these four abilities in children 4 to 9 years of age (n1⁄472) with strabismus, anisometropia, or mixed strabismus/anisometropia, and unaffected controls. Children reported the orientation of a target (a modified ‘‘Pac-Man,’’ similar to Landolt-C stimuli) using four ‘‘ghosts’’ as references. Using a modified staircase procedure we measured threshold size (acuity), contrast detection, foveal crowding (the minimum separation between target and ghostflankers supporting accurate identification), and stereoacuity (with random-dot stereogram ghosts).
Visual Psychophysics and Physiological Optics Age-Related Changes in the Anterior Segment Biometry During Accommodation

METHODS. We enrolled 33 left eyes from 33 healthy subjects (age range, 20–39 years, 17 males and 16 females). Two SD-OCT devices were synchronized to simultaneously image the anterior segment through pupil and the ciliary muscle during 6.00 diopter (D) accommodation for approximately 3.7 seconds in two repeated measurements. The anterior segment parameters included the lens thickness (LT), radius of curvature of the lens anterior surface (LAC), maximum thickness of ciliary muscle (CMTMAX), and anterior length of the ciliary muscle (CMAL). A first-order exponential equation was used to fit the dynamic changes during accommodation. The age-related changes in the dynamic response and their relationship were calculated and compared. RESULTS. The amplitude (r 1⁄4 0.40 and 0.53 for LT and LAC, respectively) and peak velocity (r 1⁄4 0.65 and 0.71 for LT and LAC, respectively) of the changes in LT and LAC significantly decreased with age (P < 0.05), whereas the parameters of the ciliary muscle remained unchanged (P > 0.05), except for the peak velocity of the CMAL (r 1⁄4 0.44, P 1⁄4 0.01). The difference in the time constant between the lens reshaping (LT and LAC) and CMTMAX increased with age (r 1⁄4 0.46 and 0.57 for LT and LAC, respectively, P < 0.01). The changes in LT and LAC per millimeter of CMTMAX change decreased with age (r 1⁄4 0.52 and 0.34, respectively, P < 0.05). The ciliary muscle forward movement correlated with the lens deformation (r 1⁄4 0.35 and 0.40 for amplitude, while r 1⁄4 0.36 and 0.58 for time constant, respectively, P < 0.05).
Visual Psychophysics and Physiological Optics In Vivo Chromatic Aberration in Eyes Implanted With Intraocular Lenses

Citation: Pérez-Merino P, Dorronsoro C, Llorente L, Durán S, Jiménez-Alfaro I, Marcos S. In vivo chromatic aberration in eyes implanted with intraocular lenses. Invest Ophthalmol Vis Sci. 2013;54:2654–2661. DOI:10. 1167/iovs.13-11912 PURPOSE. To measure in vivo and objectively the monochromatic aberrations at different wavelengths, and the chromatic difference of focus between green and infrared wavelengths in eyes implanted with two models of intraocular lenses (IOL).
Visual Psychophysics and Physiological Optics Symbol Discrimination Speed in Children With Visual Impairments

Annemiek D. Barsingerhorn, F. Nienke Boonstra, and Jeroen Goossens Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre Nijmegen, Nijmegen, the Netherlands Department of Biophysics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands Royal Dutch Visio, National Foundation for the Visually Impaired and Blind, Huizen, The Netherlands Bartiméus, Institute for the Visually Impaired, Zeist, The Netherlands
Health Benefits of the Mediterranean Diet

The Mediterranean Diet (MedDiet) has been reported to be protective against the occurrence of several diseases. Increasing evidence suggests that the MedDiet could counter diseases associated with chronic inflammation, including metabolic syndrome, atherosclerosis, cancer, diabetes, obesity, pulmonary diseases, and cognition disorders. Adoption of a MedDiet was associated with beneficial effects on the secretion of anti-inflammatory cytokines, antioxidant cellular and circulating biomarkers as well as with regulation of gene polymorphisms involved in the atherosclerotic process. The MedDiet has been considered for the prevention of cardiovascular and other chronic degenerative diseases focusing on the impact of a holistic dietary approach rather than on single nutrients. Epidemiological dietary scores measuring adherence to a MedDiet have been developed. This narrative review considers the results of up-to-date clinical studies (with a focus on the last 5 years) that evaluated the effectiveness of the MedDiet in reducing the prevalence of chronic and degenerative diseases.
Seismic array constraints on the D″ discontinuity beneath Central America

We analyzed 16,150 transverse component seismic recordings from 54 deep‐focus earthquakes in the South American and Caribbean regions recorded at broadband stations in North America between 2005 and 2012. We treated subgroups of seismic stations within 3° radius geographical bins as seismic arrays and performed vespagram analysis. We focused on the S, ScS, and Scd arrivals and collected data in the epicentral distance range from 55° to 90°. In particular, we searched for D″ discontinuity presence in the vespagrams in a 25° by 35° (or 1520 by 2130 km) area beneath Central America. Analysis of these data showed 125 clear Scd observations, 180 Scd observations of lesser quality, and 343 nonobservations. We produced a new map of the discontinuity height beneath Central America. Our map shows an average discontinuity height of 286 ± 6 km (σ = 76 km). The region is punctuated by a large topographic high centered at approximately 10°N and 90°W with a maximum height of 380 km. Two smaller topographic highs are located at approximately 4°N and 81°W (discontinuity height of 320 km) and at 4°N and 70°W (height of 315 km). The observation of multiple Scd arrivals collocated with the strongest gradients in inferred topography provides evidence for topographic variation on the discontinuity rather than multiple discontinuities. The regions where the discontinuity has the greatest height can be explained by localized enrichment of mid‐ocean ridge basalt from the subducted Farallon slab impinging on the core‐mantle boundary.
Flow around a square-section cylinder using k-@SST delayed detached-eddy simulation

The advancement in computational resources has played an exceptional role in the development of turbulence modelling. However, the simulation of complex flow is still a challenge if accuracy and low computational cost are needed. Hybrid models originate as an attempt to solve this problem. Their main principle is to use a Reynolds-Averaged NavierStokes (RANS) model to solve the near-wall flow and Large-Eddy Simulations (LES) to model the flow behaviour away from walls, particularly in regions of complex phenomena such as flow separation. A turbulence model based on the k−ω SST RANS approach and on the Delayed Detached-Eddy Simulation (DDES) hybrid technique is employed in this study. The k−ω SST-DDES model was implemented in OpenFOAM R © v2.1. 0 and tested. The main objective is to establish a suitable turbulence model that could yield accurate and reliable results for industrial and other practical applications. In order evaluate the proposed model, the flow behaviour around a squaresection cylinder is modelled and compared against experimental data. The simulation of this benchmark needs some refinements, nevertheless, the k−ω SSTDDES model shows promising results.
Microwave-assisted Synthesis, Characterization, Antimicrobial and Antioxidant Activities of 1-Benzyl-3-[(4-Methylphenyl)Imino]-Indolin-2-One and Its Co(II) Complex

Aims: To develop a simple, efficient microwave-assisted synthetic method to prepare 1-Benzyl-3-[(4-methylphenyl)imino]-indolin-2-one and its Co(II) complex, characterize and ascertain their biological significance. Place and Duration of Study: School of Chemistry, Cardiff University, Wales, United Kingdom (November, 2007); Department of Chemistry & Industrial Chemistry, Department of Biological Sciences and Department of Biochemistry, Bowen University, Iwo, Nigeria (September 2015 and June 2018). Methodology: N-benzylisatin and 4-methylaniline were microwave irradiated in acetic acid to give 1-Benzyl-3-[(4-methylphenyl)imino]-indolin-2-one (C22H18N2O, L; 58 %). L was microwave irradiated with CoCl2.6H2O in ethanol to yield its Co(II) complex. L was characterized using 1H-NMR, 13C-NMR, IR and Electronic spectra analyses, exact mass and melting point. IR and Electronic Spectra analyses with melting point confirmed the Co(II) complex was formed. The in-vitro antimicrobial activities of L were evaluated against three gram-positive bacteria (Staphylococcus aureus, Bacillus subtilis and Haemolytic Staphylococcus aureus), three gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli and Klebsiella sp.) and three fungi (Aspergillus niger, Trichoderma viride and Penicillium citrinum). The IC50 of L and its Co(II) complex were carried out against DPPH, H2O2 and NO radicals, as well as their reducing power abilities. Results: Antimicrobial studies revealed L was active against Pseudomonas aeruginosa with a high zone of inhibition (thrice that of tetracycline) and Penicillium citrinum. The IC50 of L against DPPH, H2O2 and NO radicals were 0.561 ± 0.02, 0.3 ± 0.01 and 0.53 ± 0.01 μg/ml respectively, while they were 0.200 ± 0.01, 0.9 ± 0.02 and 0.26± 0.03 μg/ml for Co(II) complex. Their reducing power abilities at IC50 were 0.53 μg/ml (for L) and 0.6 ± 0.03 μg/ml (the complex). Conclusion: L was synthesized within 15 min and its Co(II) complex within 5 min. L showed good free radical scavenging activities and reducing power when compared with ascorbic acid, while its Co(II) complex even performed better.
Bulletin of Electrical Engineering and Informatics

Received Jan 4, 2023 Revised May 27, 2023 Accepted Jun 5, 2023 In recent years various attempts have been made to automatically mine opinions and sentiments from natural language in online networking messages, news, and product review businesses. Sentiment analysis is needed as an effort to improve service performance in the organization. In this paper, we have explored the polarization of positive and negative sentiments using Twitter user reviews. Sentiment analysis is carried out using the Naïve Bayes (NB), support vector machine (SVM), and logistic regression (LR) model then compares the results of these three models. The results of the experiment showed that the accuracy of LR was better than SVM and NB, namely 77%, 76%, and 70%.
Bulletin of Electrical Engineering and Informatics

Received May 24, 2022 Revised Sep 5, 2022 Accepted Oct 12, 2022 Stereo matching algorithm plays an important role in an autonomous vehicle navigation system to ensure accurate three-dimensional (3D) information is provided. The disparity map produced by the stereo matching algorithm directly impacts the quality of the 3D information provided to the navigation system. However, the accuracy of the matching algorithm is a challenging part to be solved since it is directly affected by the surrounding environment such as different brightness, less texture surface, and different image pair exposure. In this paper, a new framework of stereo matching algorithm that used the integration of census transform (CT) and sum of absolute difference (SAD) at the matching cost computation step, non-local cost aggregation at the second step, winner take all strategy at the third step, and a median filter at the final step to minimize disparity map error. The results show that the accuracy of the disparity map is improved using the proposed methods after some parameter adjustment. Based on the standard Middlebury and KITTI benchmarking dataset, it shows that the proposed framework produced accurate results compared with other established methods.
Bulletin of Electrical Engineering and Informatics

Received Sep 30, 2021 Revised Dec 30, 2022 Accepted Feb 23, 2023 Brain computer interface (BCI) has many useful applications to help disabled people that have an active brain with difficulties in movements and speaking. One of these applications is the wheelchair, this device is operated always by just one user no sharing or borrowing the device. One-user applications need features extraction methods with high classification accuracy and small training datasets, the variability of the subjects’ mood during the recorded sessions and the tiredness during the long sessions are serious problems that affect the classification accuracy in these applications. Transfer learning can solve the problem, by recording short and separated sessions for the same subject in different training times or days. The proposed method in this paper uses motor imagery (MI) signals from different recorded sessions by one user to build an acceptable size training dataset. To regularize different recording sessions, four tuning parameters that are independent from each other are generated using a loop, these parameters are used to find the ratios of the covariance matrices. The suggested method gives very good performance using a different number of training samples compared with six different common spatial patterns (CSP) methods using only two channels.
Bulletin of Electrical Engineering and Informatics

Received Sep 6, 2021 Revised Jan 6, 2022 Accepted Feb 21, 2022 Noise in 4G communication systems is a pressing current problem. There are various ways to reduce phase noise. The sigma-delta passive adder entrenched (PAE) approach was chosen for the WCDMA system because it provides a spurious level, phase noise, and low stabilization time. Therefore, for WCDMA applications, this study proposes a frequency synthesizer. It is then suggested that the addition of a passive adder before the modulator's quantizer to eradicate any distortions created as a result of the quantization stage. The design factors for the suggested second order synthesizer for 4G are chosen based on the analytical results for all unit of the suggested system and in accordance with WCDMA specifications. The suggested PAE frequency synthesizer for the application of WCDMA reduces noise exact effectively, according to simulation findings. With this synthesizer, the inband phase noise is -75 dBc/Hz. For frequency synthesizer simulation, MATLAB (R2020) is utilized.
Bulletin of Electrical Engineering and Informatics

Received Jul 24, 2022 Revised Sep 30, 2022 Accepted Oct 24, 2022 1226 articles on privacy and COVID-19 were published by authors from 69 countries in this year's issue. COVID 19's privacy is now the focus of many researchers' attention. The present body of knowledge on privacy for COVID-19 digital technologies has been thoroughly analyzed, and a concise overview of research status and future developments can be gleaned. This paper conducted a bibliometric examination of privacy using the Scopus dataset. Utilizing VOSviewer software, the relevant literature papers published on this topic were examined to determine the field's development history, research hotspots, and future directions. Over time, there has been a rise in the number of studies published in privacy for COVID-19, particularly after 2020, and the growth rate has been steadily increasing. Regarding published research, the United States and China lead the pack. These articles appeared in primarily English-language journals and conference proceedings. Privacy and COVID-19 research was mostly computer science. The most used terms in privacy and COVID-19 were data privacy and humans. This paper examines the evolution of privacy and COVID-19 research and indicates current research priorities and future research goals. Furthermore, the privacy and COVID-19 study seem to be a promising sphere as this study identifies 26 domains.
Low-voltage bulk-driven flipped voltage follower-based transconductance amplifier

A low voltage high performance design of operational transconductance amplifier is proposed in this paper. The proposed architecture is based on bulk driven quasi-floating gate metal oxide semiconductor field effect transistor (MOSFET) which supports low voltage operation and improves the gain of the amplifier. Besides to this the tail current source requirement of operational transconductance amplifier (OTA) is removed by using the flipped voltage follower structure at the input pair along with bulk driven quasi-floating gate MOSFET. The proposed operational transconductance amplifier shows a five-fold increase in direct current (DC) gain and 3-fold increase in unity gain bandwidth when compared with its conventional bulk driven architecture. The metal oxide semiconductor (MOS) model used for amplifier design is of 0.18 um complementary metal oxide semiconductor (CMOS) technology at supply of 0.5 V.