Miracle-dz/UniFAR-FTUs huggingface dataset:
AIESEC Global Volunteer Activities and Students’ Speaking Confidence

This study intends to analyze the activities carried out by learners during their participation in the AIESEC Global Volunteer Program on their speaking confidence. Additionally, it seeks to provide an explanation regarding how these activities contribute to the enhancement of learners' speaking confidence. The research conducted is a qualitative case study, with three participants who have undergone the AIESEC Global Volunteer Program being the subjects of this study. This research was done by interviewing all the participants and collecting artifacts from the program. The result of this research was that all participants appeared to be so confident in answering the interview questions and expressing themselves. Besides, all the participants stated that the program of AIESEC Global Volunteer Activities indeed brought their confidence to the next level. In other words, during the program, they experienced so many pieces of training that it was believed that those activities contributed to the improvement of their speaking confidence.
Advancing Surgical Education: A Comprehensive Systematic Review with Meta-Analysis and Novel Approach to Training Models for Local Skin Advancement Flaps

Performing local skin flaps is a challenging task that requires cognitive and technical skills to design flaps with proper orientation to avoid distorting normal anatomy. Junior trainees need adequate exposure to gain confidence and expertise in such procedures. This article systematically reviews the literature's different local skin advancement flap training models and describes a new, easy-to-use training model. A systematic review was performed following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed, Cochrane, Web of Science, and Google Scholar databases were searched from their inception until August 2022 for articles about local skin advancement flap training models. The meta-analysis results were pooled across the studies using a random-effects model and presented as a weighted mean difference with a 95% confidence interval (95% CI). Out of 773 reviewed articles, 18 were included in the systematic review, and four reported enough data to be included in the meta-analysis. Rhomboid and Z-plasty flaps were the most commonly taught flaps by training models. The most commonly used training models were synthetic-based, followed by animal-based models. The training models significantly increased the trainees' confidence and expertise regarding local skin flap procedures (p<0.00001) for both domains. Training models, per our reported data, significantly improve the trainees' confidence and expertise in performing local skin advancement flap procedures; continuous efforts in developing and establishing new, simple-to-use, and effective training models are strongly encouraged to further improvement of surgical education and enhance the trainees' surgical skills.
Enhanced Thermal Pad Composites Using Densely Aligned MgO Nanowires

Owing to the increasing demand for the miniaturization and integration of electronic devices, thermal interface materials (TIMs) are crucial components for removing heat and improving the lifetime and safety of electronic devices. Among these, thermal pads are reusable alternatives to thermal paste-type TIMs; however, conventional thermal pads comprise a homogeneous polymer with low thermal conductivity. Composite materials of thermally conducting fillers and polymer matrices are considered suitable alternatives to high-performance pad materials owing to their controllable thermal properties. However, they degrade the thermal performance of the filler materials at high loading ratios via aggregation. In this study, we propose novel nanocomposites using densely aligned MgO nanowire fillers and polydimethylsiloxane (PDMS) matrices. The developed nanocomposites ensured the enhanced thermal conducting properties, while maintaining mechanical flexibility. The three-step preparation process involves the (i) fabrication of the MgO structure using a freeze dryer; (ii) compression of the MgO structure; and (iii) the infiltration of PDMS in the structure. The resulting aligned composites exhibited a superior thermal conductivity (approximately 1.18 W m−1K−1) to that of pure PDMS and composites with the same filler ratios of randomly distributed MgO fillers. Additionally, the MgO/PDMS composites exhibited adequate electrical insulating properties, with a room-temperature resistivity of 7.92 × 1015 Ω∙cm.
Efficient network algorithms for two special cases of the weighted set cover problem

Abstract In the weighted set-cover problem, we are given a finite set S and a collection ℧ of its subsets. A non-negative weight wj is associated with each . The problem is to find a subcollection of ℧ with minimum weight so that the union of its sets is equal to . This problem is a classic NP-hard combinatorial problem. In this paper, we investigate two special cases of the problem that can be solved in strongly polynomial time. The first is the case where any two sets either have empty intersection or overlap completely. It is shown how this case may be transformed to a minimum cut problem. The second case is where we can sort the elements of S into an order in which the elements of each set of ℧ appear consecutively. It is proved that this case reduces to a shortest path problem. In either case, examples are given to illustrate the methods.
Intralayer Synchronization in Heterogeneous Multiplex Dynamical Networks Based on Spectral Graph Theory

This paper studies a heterogeneous multiplex network model that allows different dynamics in different layers. We explore intralayer synchronization of the multiplex network under distinct types of interlayer connections. From the perspective of spectral graph theory, we propose a set of edge weight requirements to synchronize the multiplex network. Focusing on the effect of interlayer connections to intralayer synchronization, it is found that a multiplex network can achieve intralayer synchronization with a large enough interlayer coupling strength even if a single network of one layer cannot synchronize by itself. In fact, the synchronizability of the multiplex network is found to be stronger than that of the single-layer network. These results provide insights into the practical application of multiplex network theory in engineering networks.
Legal Consequences on Sirri Marriage Performers Without the Permission of the First Wife: Perspective of Islamic Law and Positive Law

The aim of this study is to examine the existence of sirri marriages occasionally. Some people even do it without the first wife's permission, resulting in losses for the perpetrators even though the law has determined that marriage must be brought before the official marriage registrar to be registered. On this issue, the researchers focused on investigating the legal consequences for sirri marriage perpetrators without the first wife's permission and the perspective of Islamic law and positive law for sirri marriage perpetrators without the first wife's consent. The provisions for sirri marriage in Islamic law are not found in the Al-Quran and Hadith. Sirri marriage can be made a criminal act in Islamic law, but the provisions fall into jarimah ta'zir. The ta'zir punishment is not directly found in the Al-Quran and Hadith, this type of punishment becomes the judge's or local government's competence. Meanwhile, according to the positive law of sirri marriages that do not comply with or follow the legal procedures for marriage or without asking for the first wife's permission, the marriage can be punished under Article 279. This type of research used a literature review. The researchers suggest that this university should socialize regarding this matter, and registration of marriages must continue to be carried out by the government and the community, in this case, religious leaders.
Inference for Iterated GMM Under Misspecification and Clustering

This paper develops a new distribution theory and inference methods for over-identified Generalized Method of Moments (GMM) estimation focusing on the iterated GMM estimator, allowing for moment misspecification, and for clustered dependence with heterogeneous and growing cluster sizes. This paper is the first to provide a rigorous theory for the iterated GMM estimator. We provide conditions for its existence by demonstrating that the iteration sequence is a contraction mapping. Our asymptotic theory allows the moments to be possibly misspecified, which is a general feature of approximate over-identified models. This form of moment misspecification causes bias in conventional standard error estimation. Our results show how to correct for this standard error bias. Our paper is also the first to provide a rigorous distribution theory for the GMM estimator under cluster dependence. Our distribution theory is asymptotic, and allows for heterogeneous and growing cluster sizes. Our results cover standard smooth moment condition models, including dynamic panels, which is a common application for GMM with cluster dependence. Our simulation results show that conventional heteroskedasticity-robust standard errors are highly biased under moment misspecification, severely understating estimation uncertainty, and resulting in severely over-sized hypothesis tests. In contrast, our misspecification-robust standard errors are approximately unbiased and properly sized under both correct specification and misspecification. We illustrate the method by extending the empirical work reported in Acemoglu, Johnson, Robinson, and Yared (2008, American Economic Review) and Cervellati, Jung, Sunde, and Vischer (2014, American Economic Review). Our results reveal an enormous effect of iterating the GMM estimator, demonstrating the arbitrari- ness of using one-step and two-step estimators. Our results also show a large effect of using misspecification robust standard errors instead of the Arellano-Bond standard errors. Our results support Acemoglu, Johnson, Robinson, and Yared’s conclusion of an insignificant effect of income on democracy, but reveal that the heterogeneous effects documented by Cervellati, Jung, Sunde, and Vischer are less statistically significant than previously claimed.
Frequency of resonance of human sweat duct in different modes of operation

Recently, some studies have demonstrated that the sweat ducts present in the skin play a significant role in terahertz (THz) wave interaction with human beings. It was reported that the sweat ducts act as a low-Q-factor helical antenna due to their helical structure, and resonate in the sub-terahertz frequency range according to their structural parameters, such as helix diameter and helix length. According to the antenna theory, a helical antenna resonates in two different modes of operation known as normal mode and axial mode and the dimension of the helix plays a key role to determine the frequency of resonance. Therefore, here we performed the optical coherence tomography (OCT) of number of human subjects on their palm and foot to investigate the density, distribution and morphological features of sweat ducts. Moreover, we calculated the dielectric properties of human skin using terahertz time domain spectroscopy. Based on the structural parameters of human sweat ducts and its THz dielectric properties of surrounding medium, we computed the frequency of resonance of sweat duct in different modes of operation and we found that these ducts resonate in subterahertz frequency region. We believe that these findings will facilitate further investigation of the THz-skin interaction and provide guidelines for safety levels with respect to human exposure to electromagnetic waves at these frequencies.
Results for a simulated resonance scan of the X(3872) at PANDA

The PANDA experiment – which will be built as part of the planned FAIR expansion of the existing GSI facility – is planned to start operation in 2017. It will utilize cooled antiproton beams with momentum resolutions of ∆pbeam/pbeam ≤ 2 · 10−5 provided by the storage ring HESR. In this work we present results for a simulated resonance scan of X(3872) under realistic assumptions. For the reconstruction the channel X(3872)→ J/ψ π+π− with a subsequent J/ψ → e+e− decay was chosen. All simulations were performed in the PandaRoot software framework taking a detailed model of the detector into account. As input parameters for the resonance scan, the X(3872) was assigned a mass of 3.872 GeV and a width of 100 keV. The production cross section for pp→X(3872) was assumed to be equal to 50 nb and the branching ratio for X(3872)→ J/ψ π+π− was set to 0.1. The simulation was performed for 20 equidistant scan points with 2 days of data taking per scan point at 50% accelerator duty factor. Background from pp→ J/ψ π+π− with a constant cross section of 1.2 nb was taken into account. Background from inelastic processes was studied using a dual parton model based generator. The MC data points were fitted with a constant plus a convolution of a Breit-Wigner and a Gaussian distribution of a fixed width. The width of the X(3872) was reconstructed as ΓX(3872)=86.9±16.8 keV which is consistent with the input width of 100 keV. We conclude that the PANDA detector is particularly qualified to perform resonance scans of exclusively produced charmonium(-like) states with non-exotic quantum numbers.
Effect the concentration of NH3 gas adsorbed on the graphene sheet on the electrical and thermal properties: A theoretical study

To differentiate the potential of graphene sensors, research into how the grafted particles interact with the graphene sheet is essential. We employed calculations based on the "density functional theory DFT,”to analyze the characteristics of native and Pt-grafted graphene sheets with NH 3 gas adsorption on their surface. Our goal is to determine how will the material may serve as a gas sensor. Increased charge transfer was seen after NH 3 gas molecules were adsorbed on the surface of Pt-decorated graphene that was significantly larger, smaller intermolecular distance, and had higher orbital hybridization as compared to virgin graphene. also, that they showed excellent sensitivity to ammonia (NH 3 ) at room temperatures.
Writing a useful empirical journal article

The impact of research depends on how well readers can understand and use published reports, yet as researchers we often fail to consider what our readers need. Instead, we structure reports to match a socially accepted, but often inappropriate, standard design – the “hourglass”. In this essay, I suggest that when writing a report, we should adjust our reporting style to suit our target readers. I outline four reporting templates for quantitative empirical studies that are suited to differing reader needs.
Numerical Study of Nocturnal Low-Level Jets over Gently Sloping Terrain

AbstractNocturnal low-level jets (LLJs) over gently sloping terrain typical of the U.S. Great Plains are investigated by means of direct numerical simulation. Such LLJs develop in a tilted atmospheric boundary layer as a result of inertia–gravity oscillations initiated by a change of the surface thermal forcing during the evening transition. External parameters are the free-atmospheric geostrophic wind, ambient atmospheric stratification, surface buoyancy forcing, and slope angle. The governing momentum and buoyancy balance equations are written in slope-following coordinates, and solved numerically in the Boussinesq approximation. The surface forcing is prescribed in a form of surface buoyancy or buoyancy flux, both of which are slope-uniform but change in time. LLJs over slopes are contrasted with LLJs over flat terrain.Slope-induced effects essentially modify the entire structure of nocturnal LLJs. The shape of the LLJ wind profile over a slope is characterized by a sharper and larger-magnitude maximum.
The DNA Barcode of cytb on Selais Bungkuk Fish (Hemisilurus heterorhynchus Bleeker) Originating from Riau, Indonesia

Selais bungkuk (Hemisilurus heterorhynchus Bleeker) is one of catfishes which is a member of family Siluridae and order Siluriformes. Selais bungkuk is an endemic fish in Riau Province. The scientific study of this fish is still limited including DNA barcoding study. This research aims to analyze the DNA barcode of cytochrome b (cytb) on selais bungkuk. Methods included colleting the fishes from Kampar River (three individuals) and Tapung River (three individuals); total DNA extraction from the muscle; electrophoresis, PCR, sequencing; and bioinformatics analysis. In this study, cytb DNA sequences were obtained from the six individual fishes studied with a size of 339 bp. The six sequences have been registered at GenBank with registration numbers MH633750, MH633751, MH633752 from Kampar River, MH633753, MH633754, and MH633755 from Tapung River. The BLASTn analysis showed that the selais bungkuk fish had the highest similarity of 92.63% with H. mekongensis and the lowest (90.00%) with selais janggut (Kryptopterus limpok). There were three nucleotides that characterize the selais bungkuk fish based on the cytb sequence such as nucleotide number 205, 229, and 280. The cytb sequence can distinguish groups of catfish separately based on their species. Conclusions and recommendations, the cytb sequences obtained in this study are the first to be reported in selais bungkuk fish and can be used as a reference for identifying this species.
Analysis of Vocational School Students' Error in Solving Linear Program Problems

The reality on the ground shows that students still make mistakes in solving problems in the form of Linear Program stories. This study aims to describe students' mistakes in solving word problems in linear programming material. The method used in this research is descriptive qualitative research. The subjects in this study were class X students of Karya Bahana Vocational School, Bekasi City. The instrument in this study was in the form of 5 questions in the form of descriptions. In addition to the instrument in the form of tests, interviews were used to dig deeper into students' answers to the questions presented. The results showed that the most errors made by students were in the aspect of errors in writing the final answers, and the fewest errors were in the aspects of transformation errors. The cause of reading errors is that students are unable to interpret sentences correctly and cannot find key words and important information. The cause of the error in understanding the problem was that students did not include the known data and the data asked. The causes of errors in the transformation are students not being able to model everyday sentences into mathematical symbols and errors in using mathematical operations. The cause of the process skill error was that the student was unable to write down the objective function and the student was unable to continue with the answer, while the cause of the error in writing the final solution was the inability of the student to draw conclusions correctly.
Phase space ray tracing for illumination optics

• A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.
A Conceptual Sector-Scale Numerical Modeling of a Landslide in an Open Pit Mine

in this study, an old rotational landslide that has reactivated in the NW sector of an open-pit mine operated within the gneiss rock unit was evaluated for geological and hydrogeological properties. The pit slopes were susceptible to mass movement when there were variations in water inflows. considering this fact, a conceptual numerical model concerning geostructural features, rainfall infiltration, and varying hydrological conditions was constructed. initially, finite element (FE) groundwater seepage analyses were performed to evaluate the effect of water flow on stability in the dry and rainy seasons. The rainy season was simulated by vertical infiltration. Since the dewatering measures are of importance in open pit slope instability mitigation, pumping wells were designed to control water flow through the disturbed zone to improve the stability of the sector that can be triggered again with changing environmental conditions. The performance and organization of the pumping wells were also simulated in the FE model. This FE model was part of a dewatering plan. From this, the effect of the pumping rate from the wells on the stability of the sector was revealed. it was also found that there should be an increase in the pumping rate in the rainy season.
Immersion and invariance-based filtered transformation with application to estimator design for a class of DC-DC converters

This paper addresses the problem of state and parameter estimation for a class of uncertain DC-DC such converters as DC–DC boost, buck and buck-boost converters. Using the advantages of Immersion and Invariance technique with input-output filtered transformation, a proper immersion and auxiliary dynamic filter is constructed in the proposed estimator. Uniform global asymptotic convergence of the estimator is proven for the system with parametric uncertainties. In the presence of both output and state dynamics perturbations, the performance of the proposed estimator has been theoretically analyzed and verified by means of simulation results. In addition, the effectiveness of this scheme is validated via experimental test for DC-DC boost converter.
Identifying Particle Correlations in Quantum Hall Regime

We introduce a method that allows the disclosure of correlations between particle positions in an arbitrary many‐body system. The method is based on a well‐known simulated annealing algorithm and the proposed artificial distribution technique. Additionally, we investigate correlations in quantum Hall liquids (we consider many‐body wave functions that have been recently determined via the cyclotron subgroup model) and present three‐dimensional plots of configuration probability distributions that have been established from numerical simulations. We demonstrate that the preferred simultaneous positions of particles (configurations of positions, which correspond to large values of a system's probability distribution, |ΨN|2 ) tend to form complicated geometric structures, which are equivalent to classical Wigner crystals only for Laughlin states. Furthermore, we claim that quantum Hall liquids attributed to non‐Laughlin fillings are correlated on subdomains rather than on a whole particle domain (due to a quantizing magnetic field, which modifies the topology of a system's dynamics). Finally, we characterize Hall‐like internal orders in terms of statistical correlations (one‐dimensional unitary representations of cyclotron subgroups). Our conclusions concerning the stability of many‐body states agree with transport measurements and various numerical studies.