Miracle-dz/UniFAR-FTUs huggingface dataset:
Interplanetary transfers with low consumption using the properties of the restricted three body problem

The first objective of this work is to understand the dynamical properties of the circular restricted three body problem in order to use them to design low consumption missions for spacecrafts with a low thrust engine. A fundamental property is the existence of invariant manifolds associated with periodic orbits around Lagrange points. Following the Interplanetary Transport Network concept, invariant manifolds are very useful to design spacecraft missions because they are gravitational currents. A large part of this work is devoted to designing a numerical method that performs an optimal transfer between invariant manifolds. The cost we want to minimize is the $L^{1}$-norm of the control which is equivalent to minimizing the consumption of the engines. We also consider the $L^{2}$-norm of the control which is easier to minimize numerically. The numerical methods are indirect ones coupled with different continuations on the thrust, on the cost, and on the final state, to provide robustness. These methods are based on the application of the Pontryagin Maximum Principal. The algorithms developed in this work allow for the design of real life missions such as missions between the realms of libration points. The basic idea is to initialize a multiple shooting method with an admissible trajectory that contains controlled parts (local transfers) and uncontrolled parts following the natural dynamics (invariant manifolds). The methods developed here are efficient and fast (less than a few minutes to obtain the whole optimal trajectory). Finally, we develop a hybrid method, with both direct and indirect methods, to adjust the position of the matching points on the invariant manifolds for missions with large energy gaps. The gradient of the value function is given by the values of the costates at the matching points and does not require any additional computation. Hence, the implementation of the gradient descent is easy.
The Impact of Intrinsic RC Coupling With Domains Flipping on Polarization Switching Time of Hf0.5Zr0.5O2 Ferroelectric Capacitor

The measurement of ferroelectric (FE) polarization switching time was known to be strongly related with RC delay, but this phenomenon has not been fully understood, as several kinds of RC effects may be involved extrinsically and/or intrinsically. In this work, by carefully excluding the extrinsic RC charging effects before and in polarization switching, we experimentally and theoretically demonstrate an intrinsic RC effect coupled in polarization switching dynamics of Hf0.5Zr0. 5O2 (HZO) FE capacitor. We found that such an intrinsic RC effect not only dominantly determine the switching time under high electric field but also significantly affect it under low field. And, a mechanism is proposed that a RC re-charging is coupled with each domain flipping in multiple domain FE system, so that the switching time is unavoidably and intrinsically affected by this coupling effect. Thus, our results provide critical messages to the speed evaluation and integrated circuit design of FE devices.
Self-esteem and locus of control of individuals with visual impairments before and during the COVID-19 pandemic: A latent class analysis

This study aims to investigate the effect of lockdowns on self-esteem and the locus of control (LoC) of individuals with visual impairments. This research question is important to be answered, as there is no previous research on the topic, and the findings of this study add significant elements to our knowledge on the subject. It is the first time that a study examines the effect of the pandemic on the self-esteem and LoC of individuals with visual impairments. The sample of the research consisted of 321 individuals with visual impairments; 176 of them participated in the pre-COVID period, 50 in the first wave of COVID period, and 95 in the second wave of COVID period. Two research instruments were used: the Rosenberg Self-Esteem Scale and the Rotter Internal–External LoC Scale. High self-esteem and a more internal LoC are positively associated with the pre-COVID period and negatively associated with first- and second-wave COVID periods. The participants with high self-esteem and internal LoC are most likely males, people with blindness, people who work, people who have a university degree, and people who frequently move independently. However, the individuals with low self-esteem and a more external LoC are most likely older people or people with higher age at onset of visual impairment. The first- and second-wave COVID periods are negatively associated with self-esteem and LoC of individuals with visual impairments.
Treatment of immunoglobulin-resistant kawasaki disease: a Bayesian network meta-analysis of different regimens

Background This study aimed to gather evidence from clinical trials on the efficacy and safety of the available treatments for intravenous immunoglobulin (IVIG)-resistant Kawasaki disease (KD) in children. Methods This work adopted the Newcastle–Ottawa scale to analyse the quality of the enrolled articles. A network meta-analysis was performed using clinical trials that compared drugs used to treat IVIG-resistant KD. Aggregate Data Drug Information System software v.1. 16.5 was employed to analyse whether infliximab, second IVIG infusions, and intravenous pulse methylprednisolone (IVMP) were safe and effective. Results Ten studies, involving 704 patients with IVIG-resistant KD, were identified and analysed. Overall, infliximab exhibited remarkable antipyretic activity compared with the second IVIG infusions (2.46, 1.00–6.94). According to the drug rank, infliximab was the best option against IVIG-resistant KD. Regarding adverse effects, the infliximab group was more prone to hepatomegaly. A second IVIG infusion was more likely to result in haemolytic anaemia. IVMP treatment was more susceptible to bradycardia, hyperglycaemia, hypertension, and hypothermia. In addition, infliximab, IVMP, and the second IVIG infusions showed no significant differences in the risk of developing a coronary artery aneurysm (CAA). Conclusion Infliximab was the best option against IVIG-resistant KD, and IVMP, infliximab, and second IVIG infusions have not significant differences of prevent CAA in patients with IVIG-resistant KD. Systematic Review Registration Identifier: https://osf.io/3894y.
Is student internship still beneficial today? The views of multi-parties in Ghana

PurposeThere is evidence of country-level contextual variations regarding the benefits of practical experience acquired by students during higher education. This paper, therefore, analyses the benefits of student internships in the Ghanaian context.Design/methodology/approachIn Study 1, two structured but distinct surveys were distributed to senior members and students of six specialised technical education institutions (TIs). Study 2 involved in-depth interviews with the heads of organisations in the tertiary education sector, including trade groups, industries and government agencies.FindingsInternship provides soft skills, confidence, career development, sense of responsibility, employability, income, knowledge sharing and networking for students/interns. For TIs, it contributes to the professional development of faculty supervisors and helps them to update the content they teach. For employers, it unveils talented and promising students who can be employed immediately after graduation at a relatively cheaper cost.Research limitations/implicationsThere is still the need for additional research in different contexts: both developed and developing economies to clear doubts on the controversies surrounding the relevance of internship in the 21st century.Practical implicationsTIs should continue to champion student internship programmes. This study highlights the need for employers to place internship students in areas that relate to their fields of study. It also underscores the need for students to embrace internship since it is the cornerstone to their employability in the labour market.Social implicationsUndeniably, student internships provide a critical platform for career beginners.Originality/valueThis paper contributes to knowledge by offering contextual literature in Ghana on the benefits of student internship programme for interns/students, TIs and employers, all together.
Thermodynamic properties of 
MgSiO3
 at super-Earth mantle conditions

Recent discoveries of terrestrial exoplanets distant from our solar system motivate laboratory experiments that provide insight into their formation and thermal evolution. Using laser-driven shock wave experiments, we constrain high-temperature and high-pressure adiabats and the equation of state of ${\mathrm{MgSiO}}_{3}$, a dominant mantle constituent of terrestrial exoplanets. Critical to the development of a habitable exoplanet is the early thermal history, specifically the formation and freezing of the magma ocean and its role in enabling convection in the mantle and core. We measure the adiabatic sound speed and constrain the melt transition along the Hugoniot and find that the adiabats and melt boundary of silicate magmas are shallower than predicted. This suggests that small changes in the temperature of a super-Earth mantle would result in rapid melting and solidification of nearly the entire mantle.
Nano CaCO3 for enhancing properties of cement-based materials: a comprehensive review

Nanomaterials have emerged as a future application to concrete technology due to their unique composition. This study presents a review of nano CaCO3 in terms of microstructure, rate of hydration, consistency, flowability, setting time, workability, compressive strength, sorptivity, chloride resistance, and corrosion resistance. A remarkable decrease in pores and chloride ion penetration can be observed from the study. Compared to the controlled concrete, the addition of 1% nano CaCO3 also resulted in the reduction of the chloride diffusion coefficient. Compressive strength showed a significant improvement with the inclusion of 1-2% nano CaCO3, however, increasing its quantity showed reduction in compressive strength property. The accelerated hydration reaction forming supplementary C-S-H gel observed in the concrete containing nano CaCO3 has remarkably improved the microstructure of the mix by reducing its porosity. This study is an initiative to accumulate findings of nano-materials for its broad acceptance and future scope of work.
Pengaruh Stres Kerja, Beban Kerja, Lingkungan Kerja terhadap Kinerja Karyawan PT. Jasa Marga (Persero) Tbk Cabang Belmera

Kinerja karyawan diidentifikasi mampu dipengaruhi oleh beberapa faktor yang dapat meningkatkan atau bahkan menurunkan kinerja karyawan. Faktor-faktor tersebut diantaranya adalah stres kerja, beban kerja yang berlebih serta lingkungan kerja yang kurang kondusif. Penelitian ini bertujuan untuk menganalisis pengaruh stres kerja, beban kerja, dan lingkungan kerja terhadap kinerja karyawan di PT. Jasa Marga (Persero) Tbk Cabang Belmera. Data penelitian dikumpulkan dari hasil kuesioner kepada 50 orang responden untuk kemudian dilakukan analisis secara statistik. Analisis statistik yang digunakan adalah analisis deskriptif dan analisis regresi linier berganda. Hasil pada penelitian menunjukkan bahwa Stres Kerja (X1), Beban Kerja (X2) dan Lingkungan Kerja (X3) berpengaruh secara positif dan signifikan terhadap Kinerja Karyawan (Y) di PT. Jasa Marga (Persero) Tbk, Cabang Balmera, Medan, baik secara parsial maupun simultan. Temuan di atas menjabarkan bahwa perusahaan hendaknya dapat menerapkan upaya-upaya untuk mencegah terjadinya stres kerja, tingginya beban kerja dan menciptakan lingkungan kerja guna mencapai kinerja karyawan yang lebih optimal.
Sparsity-based shipping noise analysis and cancellation in underwater acoustic communication

We are interested in achieving reliable underwater acoustic communication (UWAC) in the presence of noise generated by vessel traffic, i.e., shipping noise. Our general approach is to determine an underlying structure in shipping noise and to exploit this structure to remove it from desired UWAC signals. Since a well-established statistical characterization of shipping noise is not available, in this paper, we discuss our evaluation of shipping noise data sets obtained from labeled recordings from an underwater acoustic hydrophone array deployed in the Strait of Georgia by Ocean Networks Canada. Motivated by the general observation that shipping noise exhibits a structure akin to impulse noise, we study to what extent shipping noise can be described as a sparse signal. Specifically, we apply the expectation-maximization method to train a Gaussian-mixture model with two components, in which the large variance component represents the impulse-noise part. In a second step, we use the model to perform noise cancellation in a multicarrier UWAC scenario. For this purpose, we apply a sparse-signal recovery formulation and a message passing algorithm for detection, i.e., a form of compressed sensing. Numerical results show the moderate level of mitigation of shipping noise interference achieved with the proposed method.We are interested in achieving reliable underwater acoustic communication (UWAC) in the presence of noise generated by vessel traffic, i.e., shipping noise. Our general approach is to determine an underlying structure in shipping noise and to exploit this structure to remove it from desired UWAC signals. Since a well-established statistical characterization of shipping noise is not available, in this paper, we discuss our evaluation of shipping noise data sets obtained from labeled recordings from an underwater acoustic hydrophone array deployed in the Strait of Georgia by Ocean Networks Canada. Motivated by the general observation that shipping noise exhibits a structure akin to impulse noise, we study to what extent shipping noise can be described as a sparse signal. Specifically, we apply the expectation-maximization method to train a Gaussian-mixture model with two components, in which the large variance component represents the impulse-noise part. In a second step, we use the model to perform noise c.
Healthy Aging and its Determinants Among Community-dwelling Older Persons in East Coast, Malaysia: A Multidimensional Assessment.

Objectives Exploring the possibility of healthy aging among older persons is crucial for achieving optimal health in the growing older population. This study aimed to determine the prevalence, pattern, and determinants of healthy aging among older persons in Terengganu, Malaysia. Methods We conducted a community-based cross-sectional study involving older persons aged % 60 years. An interviewer-guided questionnaire, anthropometric measurements, and physical assessments were administered to operationalize healthy aging based on a multidimensional concept. Results Among the 765 older persons surveyed, only 14.1% (95% CI: 11.64? "16.59) were classified as healthy agers. Multiple logistic regression analysis revealed that superior intrinsic religiosity (odds ratio (OR) = 3.42; 95% CI: 1.34? "8.73), higher social interaction (OR = 2.82; 95% CI: 1.32? "6.04), larger calf circumference (OR = 2.05; 95% CI: 1.24? "3.38), taking water intake % 5 cups per day (OR = 2.01; 95% CI: 1.23? "3.30), better gait speed (OR = 1.71; 95% CI: 1.04? "2.80), having savings (OR = 1.71; 95% CI: 1.10? "2.66), and normal waist circumference (OR = 1.63; 95% CI: 1.04? "2.55) were found positively associated with healthy aging. Conclusions Only one in 10 older persons in the state met all the criteria for healthy aging. Specific aspects of religious status, social interaction, socioeconomic, behavioral, physical, and nutritional factors were found to predict healthy ageing in this population. These important determinants should be considered in developing a well-defined and comprehensive public health policy to promote healthy aging in the nation.
Impact of Sensory Stimulation on Perception and Performance among the Comatose: A Pilot Study

Adult brains in good health are capable of processing a variety of intricate sensory data. The faces of the object and the people are recognised, and the location, depth, and distance of the object and the people are identified. These basic and complex perceptual abilities may be impacted by a stroke or other acquired brain injury, such as a head injury. Being unaware of one's surroundings, as when sleeping, or being unresponsive to stimulation are both symptoms of being unconscious. In the area of neurorehabilitation, sensory stimulation programmes (SSP) have received the most research. A healthcare provider or a family member systematically stimulates the patient's five sensory modalities as part of sensory stimulation, a form of therapy that may improve the patient's responsiveness. In order to analyse the impact of sensory stimulation on perception and performance among comatose, double- blinded randomized clinical trial was conducted on 12 comatose patients with Glasgow Coma Scale score 3-8 and diagnosed with traumatic brain injury and cerebrovascular accidents. The patients were randomly assigned into two groups of experimental and control. The comatose patients were recruited via random sampling from various Intensive Care Units of AJ Institute of Medical Sciences, Mangalore. The experimental group was given sensory stimulation twice daily for seven consecutive days, with each session lasting 25 minutes. By contrast, the control group only received routine care from the hospital. Data was collected via demographic and clinical proforma and level of conscious was measured by Coma Recovery Scale-Revised (CRS-R). For statistical analysis, independent t test and ANOVA were computed. There was a significant increase in the post-test scores of CRS-R for experimental group which revealed that multimodal sensory stimulation effectively increased the CRS-R scores among unconscious patients in the experimental group. Nurses can use this intervention to improve sensory scores among unconscious patients in the Intensive Care Unit.
An organizational change perspective on the incorporation of parkour in a gymnastics federation

Abstract Over the last decades, sport federations have been confronted with new variants of sports, such as parkour. Parkour is considered a lifestyle sports which embraces a specific culture that often conflicts with the culture of federation-organized sport (Sterchele and Ferrero Camoletto 2017). Participation in lifestyle sports is increasing rapidly, which may pose a threat to the market position of federations regarding leisure sports (Gilchrist and Wheaton 2011). Despite the studies emphasizing the dichotomous relation between sport federations and lifestyle sports, our study explores why and how both can reconcile. In particular, our study examined how and why readiness for change was achieved in the gymnastic federation as well as in the parkour community for integrating parkour into the federation. Applying a single-case study design, drawing on Oakland and Tanner (2007) change framework, our study revealed several key mechanisms to develop a lifestyle sport in a federation context. Organizational learning proved to be an essential determinant to overcome the cultural differences. Furthermore, our results emphasized the importance of leveraging behavioural and technical leadership in the change process. This study enhances sport managers’ knowledge on how they should approach lifestyle sport communities, while delivering insights to lifestyle sport communities on the intentions of federations regarding their sport.
THE INFLUENCE OF WORK ENVIRONMENT, WORK MOTIVATION, AND COMPENSATION ON EMPLOYEE PERFORMANCE AT WAROENG SPECIAL SAMBAL

The basic problem in a business company is how to spur employee performance to always improve. This problem is also experienced by companies with types of food stalls, namely Waroeng Special Sambal (SS). Strong suspicions, lack of attention to aspects of work comfort, work encouragement, and material feedback are crucial factors for the stagnant performance of employees in the company. This study was conducted to measure the level of influence of the work environment, work motivation, and compensation on the employeeâ€™s performance of Waroeng SS. This study was an ex-post facto study using quantitative approach. A total of 80 special chili employees in the province of Yogyakarta were involved as research samples. Data collection was carried out by using a questionnaire with a 4 Likert scale questionnaire instrument. The collected data were analyzed by using multiple linear regression analysis. The results of the analysis of research data indicate that the work environment, work motivation, and compensation have a significant influence on employee performance. It is very important for Waroeng Special Sambal to pay attention to improving aspects of the quality of the work environment, strengthening work motivation, and providing competence to employees. Thus, if these three aspects are met, employee performance can also increase.
Adaptive STDP-based on-chip spike pattern detection

A spiking neural network (SNN) is a bottom-up tool used to describe information processing in brain microcircuits. It is becoming a crucial neuromorphic computational model. Spike-timing-dependent plasticity (STDP) is an unsupervised brain-like learning rule implemented in many SNNs and neuromorphic chips. However, a significant performance gap exists between ideal model simulation and neuromorphic implementation. The performance of STDP learning in neuromorphic chips deteriorates because the resolution of synaptic efficacy in such chips is generally restricted to 6 bits or less, whereas simulations employ the entire 64-bit floating-point precision available on digital computers. Previously, we introduced a bio-inspired learning rule named adaptive STDP and demonstrated via numerical simulation that adaptive STDP (using only 4-bit fixed-point synaptic efficacy) performs similarly to STDP learning (using 64-bit floating-point precision) in a noisy spike pattern detection model. Herein, we present the experimental results demonstrating the performance of adaptive STDP learning. To the best of our knowledge, this is the first study that demonstrates unsupervised noisy spatiotemporal spike pattern detection to perform well and maintain the simulation performance on a mixed-signal CMOS neuromorphic chip with low-resolution synaptic efficacy. The chip was designed in Taiwan Semiconductor Manufacturing Company (TSMC) 250 nm CMOS technology node and comprises a soma circuit and 256 synapse circuits along with their learning circuitry.
Elucidation of Nature of Gene Action and Combining Ability Associated with Economic Traits in Greengram [Vigna radiata (L.) Wilczek]

Background: Narrow genetic base and lack of exploitable variation have become a major constraint for yield improvement in greengram. Identifying genetically superior parents and breeding scheme to be adopted become a pre-requisite for the development of elite cultivars. Thereby, blending the knowledge on gene action and combining ability plays a key role. Materials: Combining ability analysis was carried out in twenty-five crosses derived out of Line x Tester mating design using 5 lines and 5 testers. The hybrids, parents and the check variety were evaluated in a RBD with two replications and ten quantitative characters were recorded. Result: Non-additive gene action was found to be prevalent for the quantitative traits observed. Exploring the per se and gca effects, COGG13-39 and VGG18-002 were adjudged as the best parents and the crosses involving above parents will be productive for synthesizing a dynamic population with superior recombinants. Meanwhile, exploring the per se, sca and heterosis, the best specific crosses identified for seed yield/plant and pods per plant were, V2709 x GAM5 and COGG13-39 x VGG16-058. They can be further exploited to obtain transgressive segregants for higher yield, bold seeds and bruchid resistance through appropriate breeding strategy.