Miracle-dz/UniFAR-FTUs huggingface dataset:
How do firms in co-located clusters interact? Evidence from Greater Montreal

We developed a theoretical framework to explore how firms agglomerate and develop linkages within and across co-located clusters in a competitive urban economy. We applied our framework to Montreal, where we analyzed relationships among its aerospace, information technology and artificial intelligence firms. Using network community structure analysis, we show that firm linkages largely agglomerate within industrial lines. However, there are important nuances. Clusters themselves are not homogeneous and firms specializing in similar or complementary technological subfields develop denser connections with each other. Moreover, technological similarity and complementarity, as well as a common business context, force some groups of firms to develop linkages across clusters, creating significant overlap across certain industries.
Effect of acetone and ethanol on pervaporation separation of butanol

The adsorption of silicalite-1 to acetone,butanol and ethanol in the acetone-water,butanol-water,and ethanol-water binary mixtures,and acetone-butanol-water and ethanol-butanol-water ternary mixtures was investigated.With the home-made silicalite-1/silicone rubber hybrid pervaporation membranes,pervaporation separation of butanol-water,acetone-water,ethanol-water binary solutions was examined at different temperature.The effects of acetone and ethanol on pervaporation separation of butanol were studied at different concentration and temperature.The experimental results showed that the membrane permeability of butanol would increase in the presence of acetone and ethanol.
The Effect of “SELF-HELP Packages” on Post Stroke Depression among Ischemic Stroke Survivors

Background: There are several factors that contribute to Post Stroke Depression (PSD). Since a single intervention is proven ineffective to deal with PSD, an intervention which includes biological, psychological, social, and spiritual aspects (“SELF-HELP Packages”), therefore, needs to be established.Purpose: The purpose of the study was to investigate the effect of “SELF HELP Packages” intervention on PSD among ischemic stroke survivors after three months from onset and its effect after confounding variables were controlled.Methods: This study was a pre and post quasi-experiment with a control group involving 34 ischemic stroke survivors each group. The inclusion criteria were survivors after three months from ischemic stroke, no aphasia, having a good hearing, and having Mini Mental Status Examination (MMSE) score of ≥ 22. GRID-HAMD 17, Multidimensional Scale of Perceived Social Support (MSPSS), and Barthel-Index were used to measure PSD, social support, and functional status respectively. “SELF-HELP Packages” intervention was delivered in three sessions, namely information delivery, discussion and activity. Statistical analyses were conducted using McNemar test, Chi-square and logistic regression.Results: The result showed that “SELF-HELP Packages” considerably decreased PSD in the intervention group (p=0.004). There were also significant differences in PSD after the intervention between two groups (p=0.008). Logistic regression showed that ‘SELF-HELP Package” had no effect on PSD when other confounding variables were controlled (p=0.075, OR=0.288, 95% CI 0.073 – 1.135). Conclusion: SELF-HELP Packages” should be applied in providing the nursing intervention among stroke ischemic survivors in clinical setting. A longer period of time for the intervention is also recommended for the next study in order to obtain a more robust result.
Numerical Simulations of Novel Conning Designs for Future Super-Large Wind Turbines

In order to develop super-large wind turbines, new concepts, such as downwind load-alignment, are required. Additionally, segmented blade concepts are under investigation. As a simple example, the coned rotor needs be investigated. In this paper, different conning configurations, including special cones with three segments, are simulated and analyzed based on the DTU-10 MW reference rotor. It was found that the different force distributions of upwind and downwind coned configurations agreed well with the distributions of angle of attack, which were affected by the blade tip position and the cone angle. With the upstream coning of the blade tip, the blade sections suffered from stronger axial induction and a lower angle of attack. The downstream coning of the blade tip led to reverse variations. The cone angle determined the velocity and force projecting process from the axial to the normal direction, which also influenced the angle of attack and force, provided that correct inflow velocity decomposition occurred.
Ethnobotany and the Antibacterial Activity of two Indigenous Spice Plants in Healthcare System of Ogbia-Speaking People of Bayelsa State Nigeria

Quick Response Code Abstract: Ethnomedicinal survey and antibacterial study of ethanol and aqueous extracts of Piper guineense and Tetrapluera tetraptera were carried out in Ogbia communities and Microbiology Laboratory Federal University Otuoke respectively. Rapid appraisal method and Use-Value index were applied to fetch information on ethnobotanical use of the two spice plants (commonly used among Ogbia people in Bayelsa State), and their antibacterial activities were tested on Staphylococcus aureus, Streptococcus pyogenes, Escherichia coli and Pseudomonas aeruginosa. Ethnographic data shows that the principal health-care uses of the spices correspond to gastro-intestinal treatment, and fruits were the most important section utilized for managing health disorders. The fruit extracts yielded strong antibacterial activity against the organisms at the treatment regimens (200-12.5mg/ml), the zones of inhibition in both case decreases down concentration gradients. Escherichia coli shows the widest Zone-of-Inhibition in Piper guineense at each concentration regimen. The widest Zone-of-inhibition in Tetrapluera. tetraptera extracts were recorded against S. aureus, and the lowest Minimun-InhibitoryConcentration, 2.5mg/ml occurred at the assay of Piper guineense against E. coli, and similar trend occurred in Tetrapleura. tetraptera extracts. Also Minimum-InhibitoryConcentration of 2.5mg/ml and 5mg/ml was recorded on Streptococcus pyogene in ethanol and aqueous extract respectively, justifying the ethnomedicinal uses of the spices among the people.
When does job burnout not hurt employee behaviours?

PurposeThe purpose of this study was to describe and explain the relationship between job burnout (JB), organisational citizenship behaviours (OCBs) and counterproductive workplace behaviours (CWBs). The job demands-resources theory was applied to test the moderating role of perceived organisational support (POS) in the relationship shared by JB, OCBs and CWBs.Design/methodology/approachThe study was conducted anonymously on a group of 253 telephone customer support services employees from companies operating in Poland. Moderation analyses for statistical verification were conducted with macro PROCESS version 3.3. FindingsThe research confirmed a significant statistical relationship between JB and all the studied variables: POS, OCBs and CWBs. It may be concluded that JB increases the probability of CWBs and decreases employee readiness for OCBs. When employees experienced POS, a reduction in tendency for counterproductive behaviours was observed, while citizenship behaviours remained unchanged. Thus, it might be concluded that POS levels off the intensity of the influence of JB on employees’ organisational behaviours.Practical implicationsIndividuals who lack enough social resources to perform their job tasks limit their citizenship activity in the workplace within their behavioural strategy (helping, initiative, etc.). In order to protect their resources, they may also display strategies that are destructive for their organisational environment, e.g. incivility or production deviance. In the situations when the organisation and superiors provide employees with support and demonstrate concern for providing comfortable working conditions, such persons, even in the case of perceived emotional exhaustion, maintain a high level of job activity.Originality/valueThe combination of variables presented in the research model explains the significance of the chosen determinants of behaviours that are key from the perspective of the organisation’s effectiveness and market competitiveness. This research extends knowledge pertaining to the relationship between JB and organisational behaviours.
NEW STABILITY INDICATING RP-HPLC METHOD FOR ESTIMATION OF MYCOPHENOLATE MOFETIL CAPSULE IN PHARMACEUTICAL DOSAGE FORM

A simple stability indicating reverse phase high performance liquid chromatographic (RP-HPLC) method was developed for separation of Mycophenolate mofetil with impurity-c and validated for the determination Mycophenolate mofetil activity in Mycophenolate mofetil capsule formulation. Separation of Mycophenolate mofetil was successfully achieved on Hypersil BDS C18(250mm x 4.6mm x 5.0 µm) column utilizing phosphate buffer (7.0 pH) and acetonitrile (65:35 v/v), as mobile phase at a flow rate of 2mL/min and the eluate was monitored using PDA Detector at 250 nm. The retention time was found to be 6.520. The developed method was validated as per ICH guidelines for specificity, linearity and range, precision, accuracy, robustness and ruggedness. The results of all the validation parameters were well within their acceptance values. The method gave good recovery in the range of 97.0% to 103.0% for the given Capsule form when it was applied for its determination in pharmaceutical dosage form.
Robust Vision-Aided Inertial Navigation System for Protection Against Ego-Motion Uncertainty of Unmanned Ground Vehicle

The vision-aided inertial navigation system is of vital importance and great urgency to guarantee accurate and reliable navigation information for unmanned ground vehicles (UGV) in Global Navigation Satellite System-challenged/denied environments. Yet, it is almost inevitable to occur unpredictable stochastic disturbances caused by ego-motion uncertainty due to uneven pavements, unstructured and dynamic scenes, which may lead to the divergence of estimation algorithms and the unreliability of positioning. In this article, we aim at developing a robust strategy for vision-aided inertial navigation to resist uncertainties, and modifying unscented Kalman filter by formulating a novel adaptive factor according to the degree of abnormity (DoA). Applying the robust strategy and algorithms, a monocular camera and an inertial measurement unit (IMU) are tightly fused to construct a robust vision-aided inertial navigation system. During the fusion process of integrated IMU and camera, the new method can automatically estimate the DoA of UGV ego-motion uncertainty online, considering the relationship between the factual and estimated innovation covariances. Thus, we can adaptively adjust the estimation error covariance matrix and the Kalman gain for different scenarios on the basis of DoA levels. As the modification is made in the framework of Kalman filter, the real-time performance, robustness, and high-accuracy positioning can be achieved using the proposed adjustment strategy. Experiments with the KITTI dataset are carried out under different road conditions. The experimental results show that the robust vision-aided inertial navigation system possesses good robustness and self-adaptation for protection against ego-motion uncertainty, and can improve the positioning accuracy of UGV.
Contending Views and Power Struggle within Islam: The Clash of Religious Discourse and Citizenship in Contemporary Indonesia

In the last 20 years, the ‘conservative turn’ toward overtly Islamic identity in Indonesia paved the way for raising the political Islamism. This political Islamism aspires to the continuing Islamization, implementation of sharia, and even the establishment of a global caliphate. Emerging Islamist forces such as FPI, Jamaah Tarbiyah, and HTI along with the conservative turn, therefore, pose the normative-political challenges to both republican and liberal notions of citizenship. This paper deals with the question of religion and citizenship under the democratic space in contemporary Indonesia. By examining three variants of Islamic citizenship, religion vigilant, pragmatic, and rejectionist citizenship, this paper tries to address the following question: to what extent Islamism challenges the discourse of citizenship in contemporary Indonesia? We argue that while Islamism apparently rises and gains followers, the state and mainstream Muslim organizations (NU and Muhammadiyah), and their emphasis on Pancasila and commitment to NKRI successfully manage to reconcile Islam and citizenship under democratic space.
Determination of carbon-related trap energy level in (Al)GaN buffers for high electron mobility transistors through a room-temperature approach

A room-temperature method to determine the trap energy levels in the carbon-doped (Al)GaN buffers is developed via a transient current measurement on the AlGaN/GaN high electron mobility transistors under back-gate voltages combined with a measurement of the buffer vertical leakage. Under high back-gate voltages, a linear relationship is obtained between the trap energy levels and the square roots of electric field strength, suggesting that the vertical conduction in the C-doped buffer follows the Poole–Frenkel law. The trap energy level in C-doped Al0.07Ga0.93N is finally determined to be 1.1 eV through the established room-temperature approach, while that in C-doped GaN is extracted to be 0.9 eV, both of which are related to the carbon impurities.
A New Proposal for the Closed-Loop Orientation Control of a Windfloat Turbine System

It is believed that offshore wind power will play an important role in fulfilling the environmental commitments made in the Paris Agreement signed in 2015. The use of floating solutions in offshore wind power is gaining prominence, since it allows the expansion of these technologies to a large number of regions in which this has not been technically feasible until now. One of the current issues that needs to be studied in detail as regards offshore wind structures are the oscillations produced by the waves and the wind that could cause important problems in the turbine such as the reduction of the efficiency and performance or the appearance of structural damages owing to undesired loads on the blades, among others. This signifies that the inclination of the structure must not exceed a certain small value in the operating phase. This paper, therefore, presents a simple dynamic modeling and a nonlinear multivariable control model-based system for a Windfloat turbine whose main function is to stabilize the system and to keep it vertical in order to improve its operation and, therefore, maintain the offshore wind turbine in the optimal conditions required to harness energy from the wind. The effectiveness of both the dynamic model and the proposed control algorithm has been demonstrated by developing various simulations in a MATLAB-Orcaflex environment, in which the Windfloat structure proved to have very small vertical deviations when wind impinges over the rotor, despite the undesirable effects caused by parametric uncertainties (e.g., the effect of the anchoring cables) in the system and unmodeled unmatched perturbations (such as the effects of the wind and the waves on the Windfloat turbine).
Quality of ensiled Guinea grass (Panicum maximum) at varying proportions with sweet potato peels for ruminant production in Niger Delta, Nigeria

Quality of ensiled Panicum maximum with different proportion of sweet potato peels for ruminant production was studied. Panicum maximum (PAM) were harvested at 4-week regrowth, chopped to 2-3 cm, wilted and ensiled with sweet potato peel (SPP) at different proportions (%) to have seven experimental treatments: T1 (100 PAM/ 0 SPP); T2 (90 PAM/ 10 SPP); T3 (80 PAM/ 20 SPP); T4 (70PAM/ 30 SPP); T5 (60 PAM/ 40 SPP; T6 (50 PAM/ 50 SPP); T7 (40 PAM/ 60 SPP). Bamma bottles (960mL) were used as laboratory silos. Each treatment had three replicates in completely randomize design. The ensiled materials were kept for 270 days. Physical characteristics, chemical composition and fiber fractions were examined. The colour observed were yellowish-green to olive-green, while the aroma was mild sweet in all the treatments except T3 and T6 with 20% and 5% mouldiness, respectively. Firm texture was recorded for all the treatments, while the pH values ranged from 2.9 – 3.7. There was a significant (P<0.05) difference in DM, CP, CF, ash, NFE, NDF, ADF and NFC except ether extract. There was no significant (P>0.05) different in the Ca, P, Na and Mg content of the silage. The value of Fe and Zn was significantly different (P<0.05) and ranged from 165.7 – 169.2 mg/kg and 22.30 – 23.70 mg/kg, respectively. There was a significant difference (P<0.05) in the 24hrs gas production, methane production (CH4), short chain fatty acid (SCFA), organic matter digestibility and metabolizable energy (ME), while similar (P>0.05) value was recorded for dry matter digestibility(DMD) and fermentation efficiency (FE) across the experimental treatments. The qualities recorded for the experimental treatments at the end of 270 days ensiled period, showed that the silage of Panicum maximum with different proportions of sweet potato peel especially T4 (70 PAM/30 SPP) could sustain ruminant production especially during the dry season.
Implementation and Evaluation of a Serious Game for Working Memory Enhancement

The amount of information which can be stored in the human brain is limited and dependent on memory capacity. Over the last few years there has been a trend in training cognitive skills, not only to prevent cognitive decline, which is inevitable as a person grows older, but also to increase or at least preserve mental abilities that will allow a person to function at a higher cognitive level. Memory is one of those key aspects among cognitive skills that has a significant role in a person’s mental performance. Specifically, focus is given to Working Memory (WM), as evidence has shown that it can be increased by applying targeted interventions. An intervention program like this is the main object of this current paper. Using a Serious Game (SG), we designed and created a video game which targets WM training. Its effectiveness was tested and evaluated through an evaluation process where forty people participated in a seven-week training program. Post-results showed that participants had an increase in their WM performance, especially those who had lower scores at the pre-test, while those with high pre-test scores just preserved their initial status. Additionally, all participants agreed that the game is fun and enjoyable to play and that it helps them to increase WM performance.
Methodology for Increasing the Efficiency of Dynamic Process Calculations in Elastic Elements of Complex Engineering Constructions

This study deals with a methodology for increasing the efficiency of dynamic process calculations in elastic elements of complex engineering constructions. We studied the complex dynamic processes in a simple engineering construction, a mechanical system of an elastic body–continuous flow of homogeneous medium. The developed methodology is based on the use of a priori information on some of the vibrations forms, the construction of a “simplified” mathematical model of system dynamics, and the obtaining of an analytical relationship that describe the overall range of factors on the elastic vibrations of system. The methodology is used for cases of complex vibrations of elastic bodies, and the obtained results can serve as a basis for choosing the main technological and operational parameters of elastic elements of mechanisms and machines that perform complex vibrations. The results obtained in this work are the basis for calculating the blast effect on the elements of protective structures in order to increase their protective capacity by improving the method of their attachment or by using additional reinforcement, buff load effects on the elements of drilling strings and dynamic processes that occur during surface strengthening by work hardening in order to avoid resonance phenomena, and technological processes of vibration displacement or vibration separation of granular media.
Metasurface Concept for mm-Wave Wideband Circularly Polarized Horns Design

A novel millimeter-wave (mm-wave) wideband circularly polarized (CP) horn antenna using iris polarizer is reported. By introducing the metasurface concept, the electrical contact problem at the mm-wave band for waveguide-separated components of high-performance CP horn antenna is eliminated. The influence of air gaps on polarizer and whole horn antenna loaded and unloaded metasurface is analyzed and explained. According to simulation, small air gaps of the metal-to-metal contacting plane would not harm the horn performance after loading the metasurface, which means the proposed method can achieve a better tolerance of manufacturing and assembly errors and is more suitable for high-frequency CP horn design. For validation, the proposed horn antenna has been fabricated and its performance is evaluated. The measurement results are in good agreement with the simulation results. The experimental results of 37.8% bandwidth from 75 to 110 GHz for both the axial ratio (AR) <3 dB and $\vert S_{11}\vert < -13$ dB are achieved.
Narcissism, Entrepreneurial Learning and Entrepreneurial Failure

This study evidences that psychological construct in terms of narcissistic behavior through an excessive use of social media will not boost entrepreneurs to learn from past failure experiences in business. By considering excessive narcissism through social media as a personality disorder, this study examines it as a possible cause of entrepreneurial failure. The study uses data from two sets of questionnaire with one hundred and fifty failed entrepreneurs. Analysis is quantitatively undertaken with Structural Equation Modelling/SEM and is supported by the result of Narcissistic Personality Inventory-16/NPI-16 questionnaire which reflects the degree of respondents’ narcissistic behavior. The study infers that the greater narcissistic behavior entrepreneurs has, even with the presence of entrepreneurial learning from the past failures, may lead entrepreneurs to experience subsequent failure. Stubbornness and hypocrisy are two reasons behind this. Therefore, entrepreneurs should be aware of their negative character-personality and psychological aspects when performing entrepreneurial processes.
IDENTIFYING BEST-PRACTICE STRATEGIES FOR MANAGING RESIDENTIAL CAREGIVERS WORKING WITH CHILDREN AT RISK

Residential caregivers are the central figures responsible for the children in their charge. Their work is physically and emotionally taxing, and carried out under pressure: they are prone to burnout. In addition, their status is lower than that of other staff. This study aimed to identify the strategies to improve caregiver functioning that have been adopted in Israel’s residential social-service facilities, and to examine the extent of their implementation. A two-stage, mixed-methods study design was employed. In the qualitative stage, six successful care facilities were identified; their directors were interviewed in depth using the Learning from Success method. In the quantitative stage, a survey was administered to 95 directors, using open and closed questions. Six best-practice strategies for working with caregivers were identified: careful screening, training, ongoing supervision, personal and professional support mechanisms, flexible schedules, and a clear work plan and procedures. While these strategies were applied to some extent in most facilities, they varied in scope and implementation. Using a regression model, we found a connection between the implementation of these strategies and the directors’ satisfaction with the caregivers’ work. We discuss recommendations that can help directors incorporate the six strategies in residential homes and meet the challenges directors face in their work with caregivers.