Miracle-dz/UniFAR-FTUs huggingface dataset:
The peeling behaviour of a graphene sheet on a nano-scale corrugated surface

The peeling process and average peeling force of a graphene (GE) sheet on a corrugated surface are investigated using molecular dynamics simulation. It is found that the peeling behaviour varies with the substrate surface roughness and the peeling angle. Three kinds of typically peeling behaviours include (a) GE sheet directly passing the valley of the substrate roughness; (b) bouncing off from the substrate; and (c) continuously peeling off similarly to that on a flat substrate. As a result, the average peeling force is strongly dependent of the peeling behaviours. Furthermore, some interesting phenomena are caught, such as partial detaching and partial sliding of GE sheet in the valley of the substrate roughness, which are mainly due to the effects of pre-tension in GE sheet and the reduction of friction resistance. The results in this paper should be useful for the design of nano-film/substrate systems.
FACTORS INFLUENCING THE INTENTION TO USE MYSEJAHTERA APPLICATION AMONG MALAYSIAN CITIZENS DURING COVID-19: A PLS-SEM Analysis

Many countries in the globe have experienced COVID-19 pandemic in the year 2020, and this has caused government to come out with various tracking applications to trace the individuals who get infected with the virus. However, with the implementation of the tracking application by the government, there always be issues related to the personal information and data privacy store in the system, which will make the citizens intent to use the technology or vice-versa. Hence, this study aims to examine the factors influencing the intention to use MySejahtera application among Malaysian citizens. The study utilized Unified Theory of Acceptance and Use of Technology (UTAUT2) Theory to guide the study, where the determinants were performance expectancy, effort expectancy, social influence, facilitating conditions, habit, and perceived privacy credibility. Purposive sampling was employed in this study, where a quantitative (survey) method was used, in which online questionnaires were distributed to the Malaysian citizens who know or have heard about the MySejahtera tracking application which ultimately with generated 401 valid responses. The data were then analysed using Partial Least Squares Structural Equation Modelling through Smart-PLS 3.0. The results revealed that four (4) determinants (social influence, facilitating conditions, habit, and perceived privacy credibility) have a positive and significant relationship with intention to use MySejahtera application. However, performance expectancy and effort expectancy were found not to be significantly related to intention to use the particular tracking application. The study contributes to the media information technology scholarship by incorporated perceived privacy credibility as an important construct to further expand the UTAUT2 Theory in relation to the Internet of Things (IoT), which provide relevant strategies for government agencies, medical and healthcare practitioners to track on the suspected patients. Conclusion, implications, and suggestions for future study were also discussed. © 2021 Journal of Applied Structural Equation Modeling.
A ROSAT survey of Wolf–Rayet galaxies

We present results from a ROSAT Position Sensitive Proportional Counter (PSPC) survey of the X-ray emission from Wolf–Rayet (WR) galaxies, a class of galaxies believed to be young starbursts (with ages of t∼4–6 Myr), many of which are blue compact dwarf galaxies. Of the 36 WR galaxies listed in the catalogue of Conti, a total of 14 have been observed deliberately or serendipitously with the ROSAT PSPC, and of these, seven have been detected. The derived X-ray luminosities of WR galaxies range over nearly three orders of magnitude, from LX∼4×1038 s−1 to 2×1041 erg s−1. The X-ray spectra of the WR galaxies can typically be well-fitted with a single temperature Raymond–Smith spectral model, with a temperature in the range kT=0.3–1.0 keV, with the general trend that the more X-ray-luminous WR galaxies have hotter spectra. WR galaxies are significantly X-ray-overluminous for their blue luminosity, compared with a sample of nearby spiral and starburst galaxies. In addition, the X-ray luminosity of WR galaxies correlates well with the far-infrared luminosity LFIR and the number of Lyman continuum photons NLyc. No strong correlation was found with the equivalent width of the WR emission feature around λ4686 A, the presence of which essentially defines the class of galaxies. There is little evidence of extended X-ray emission. Various explanations for the observed properties of WR galaxies are explored, and we conclude that the X-ray emission provides strong evidence that a large fraction of the observed X-rays are coming from a hot superbubble formed by the combined action of stellar winds from massive early-type stars in the central starburst cluster. These results are consistent with, and add weight to, the view that WR galaxies are young starbursts, in which the duration of the star-forming epoch was very short, and that we are viewing them a few Myr after the initiation of the starburst. As such, WR galaxies represent an important epoch in the evolution of starburst galaxies.
Optimal transformations for categorical autoregressive time series

This paper describes a method for finding optimal transformations for analyzing time series by autoregressive models. ‘Optimal’ implies that the agreement between the autoregressive model and the transformed data is maximal. Such transformations help 1) to increase the model fit, and 2) to analyze categorical time series. The method uses an alternating least squares algorithm that consists of two main steps: estimation and transformation. Nominal, ordinal and numerical data can be analyzed. Some alternative applications of the general idea are highlighted: intervention analysis, smoothing categorical time series, predictable components, spatial modeling and cross‐sectional multivariate analysis. Limitations, modeling issues and possible extensions are briefly indicated.
Some notes on robust sure independence screening

Sure independence screening (SIS) proposed by Fan and Lv [4] uses marginal correlations to select important variables, and has proven to be an efficient method for ultrahigh-dimensional linear models. This paper provides two robust versions of SIS against outliers. The two methods, respectively, replace the sample correlation in SIS with two robust measures, and screen variables by ranking them. Like SIS, the proposed methods are simple and fast. In addition, they are highly robust against a substantial fraction of outliers in the data. These features make them applicable to large datasets which may contain outliers. Simulation results are presented to show their effectiveness.
The Performance of the Pico Scale Turgo Water Turbine Coconut Shell Blade with Variations in Nozzle Diameter and Distance

The Turgo turbine is a pico-scale water turbine that can produce less than 5kW electricity at low altitudes. Turgo turbines also have quite affordable investment and maintenance costs. Turgo turbine design is strongly influenced by the speed triangle and the size of the nozzle diameter. This study aims to compare the nozzle diameter with the nozzle distance on the coconut shell blade on the efficiency of the Turgo turbine. This turbine is designed with a height of 3.5 m, a flow rate of 32.5 l/m, with various diameters and nozzle distances. Variations in the diameter of the nozzle are 8,10,12 mm, and the nozzle distance is 100, 150,200 mm. based on the study results, the best diameter is 8 mm and a distance of 100 mm. The results of the computational efficiency of 49%.
REDISCOVERING LIFE (POST TRAUMATIC GROWTH ON PEOPLE LIVING WITH HIV)

Background: Post-traumatic growth is a life change. People living with HIV who start to adapt to the current condition have a better life and positive emotion by rediscovering happiness. Post-traumatic growth occurs due to individual thoughts regarding life purposes and reviewing their life priorities. Objectives: This study aimed to explore the post-traumatic growth process experienced by people living with HIV. Methods: This study employed the qualitative study method with a descriptive phenomenology approach on six participants with HIV at Yayasan Sehat Peduli Kasih, Semarang. The participants were selected following the inclusion criteria, i.e., 24-25-year-olds with no cognitive disorders and regular treatments. The exclusion criteria in this study were participants who could not attend the interview process, although the researchers already made recurring appointments. The interview type utilized in this study was a semi-structured interview. The data analysis model in this study followed the data analysis steps of the colaizzi method. Results: Four themes emerged as part of post-traumatic growth. The four identified themes in this study are 1) early stage of HIV positive, 2) post-traumatic growth process, 3) becoming a better person after rediscovering life, and 4) future wishes after rediscovering life. The acquired themes are illustrations of post-traumatic growth in rediscovering life. Conclusion: Most People living with HIV have rediscovered purposes and wishes, although they continue to eliminate self-stigma and transform self-image to be positive. It is necessary to develop an HIV intervention program to improve and help the sufferers encounter internal stigma. The interventions include any ECT and spiritual mindfulness that focus on improving self-confidence.
Three-Dimensionality in Reynolds-Averaged Navier-Stokes Solutions Around Two-Dimensional Geometries.

The flow over two-dimensional geometries is studied via unsteady numerical simulations that are three dimensional, with periodic conditions applied along the spanwise coordinate. This framework is well accepted for direct numerical simulations (DNS), large-eddy simulations, and detached-eddy simulations (DES), but is here combined with standard Reynolds-averaged Navier-Stokes (RANS) turbulence models. This strategy, which is not new, is referred to as unsteady RANS (URANS). Limited previous evidence suggested that, in URANS, three dimensionality is suppressed by high eddy-viscosity levels. However, three dimensionality proves fairly easy to sustain with adequate initial conditions, in all three cases studied here: stalled airfoil, circular cylinder, and a rounded square, except that for one case three dimensionality failed to last from random-based initial perturbations and was sustained only when using a DES field as initial condition.
EXCHANGE RATE STABILITY IN ASEAN COUNTRIES DURING THE COVID-19 PANDEMIC

This study aims to analyze the effect of macroeconomic variables on exchange rate stability in five developing countries in Southeast Asia that are members of the Association of Southeast Nations (ASEAN) geopolitical and economic organization to see the short-term and long-term relationships during the COVID-19 pandemic. The data used is secondary data, from International Financial Statistics (IFS) for the period January 2020 to June 2022 using the Vector Error Correction Model (VECM). The results show that in the long run the variables that have a positive influence on exchange rate stability are lending rates, exports and the money supply. While the variables that have a negative influence are deposit rates, imports and the current account. In the short term, variables that have a positive influence on exchange rate stability are deposit rates, imports and the current account. However, the variable lending rates, exports and the money supply have a negative effect
Quand la routine s’installe: Remarques sur les emplois de à de type ‘routine sociale’

The use of the preposition a ‘at’ involving ‘social routines’ gave rise to less attention than its locative use in the linguistic literature on space. In this paper, we highlight the main properties of this use of the preposition –‘functional’ expression of an activity or state, neutrality to number, possible lack of reference to a landmark/ground entity– by successively examining landmark nouns that refer to ‘objects’ and to ‘locations’. On this basis, we then sketch out the semantic mechanism which, according to us, seems to underlie this interpretation of the preposition a. Finally, we parallel this semantic functioning with that of bare singular nouns and incorporated nominals as recently described in the literature.
Lie Algebras with Abelian Centralizers

We classify all finite-dimensional Lie algebras over an algebraically closed field of characteristic 0, whose nonzero elements have abelian centralizers. These algebras are either simple or solvable, where the only simple such Lie algebra is ${\mathfrak{sl}}_2$. In the solvable case, they are either abelian or a one-dimensional split extension of an abelian Lie algebra.
Attitude Towards Online Product Endorsement Using Digital Celebrities: The Case of Laptops

Although the broad concept of celebrity endorsement is not new, the popularity of its Social Media version skyrocketed over the last several years, being exploited even by notorious and top-tier companies. A substantial body of academic research approached the traditional celebrities’ endorsement, leaving rather unstudied the impact of digital celebrities’ endorsement power. Aiming at reducing the literature gap, the present study investigated the audience’s attitude towards online endorsement that includes famous vloggers (a category of digital celebrities) and its effect on future behaviors. In this sense, a conceptual model was tested using the structural equation modeling technique in the context of a primary research. The results unveiled that the perceived characteristics of the celebrity reflect on the overall attitude towards the vlogger. Despite influencing the attitude towards endorsed products, video content, product recommendation and engagement on source’s Social Media channel, the attitude towards the celebrity didn’t have a direct effect on purchase intention. The attitude towards the video content affected the attitude towards the product and both were shown to have a positive influence on purchase intention and recommendation. Yet, only the first one reflected on actions concerning celebrity’s online platform.
Handling of nanoparticles with light pressure forces

The original microscopic system has been developed for the investigation of nanoparticles moving in the electromagnetic field of laser beam. In our scheme nanoparticles could be observed in the direction perpendicular to the incident laser beam in the dark-field mode. In this work a flow of nanoparticles, induced by light pressure forces in laser beam is investigated using the particle image velocimetry technique. Laser manipulation of nanoparticles with wide laser beam was experimentally demonstrated.
A Latent Process Model for Temporal Extremes

This paper presents a hierarchical approach to modelling extremes of a stationary time series. The procedure comprises two stages. In the first stage, exceedances over a high threshold are modelled through a generalized Pareto distribution, which is represented as a mixture of an exponential variable with a Gamma distributed rate parameter. In the second stage, a latent Gamma process is embedded inside the exponential distribution in order to induce temporal dependence among exceedances. Unlike other hierarchical extreme‐value models, this version has marginal distributions that belong to the generalized Pareto family, so that the classical extreme‐value paradigm is respected. In addition, analytical developments show that different choices of the underlying Gamma process can lead to different degrees of temporal dependence of extremes, including asymptotic independence. The model is tested through a simulation study in a Markov chain setting and used for the analysis of two datasets, one environmental and one financial. In both cases, a good flexibility in capturing different types of tail behaviour is obtained.
Foundations Of Mechanics

Introduction Foreward by Tudor Ratiu and Richard Cushman Preliminaries Differential Theory Calculus on Manifolds Analytical Dynamics Hamiltonian and Lagrangian Systems Hamiltonian Systems with Symmetry Hamiltonian-Jacobi Theory and Mathematical Physics An Outline of Qualitative Dynamics Topological Dynamics Differentiable Dynamics Hamiltonian Dynamics Celestial Mechanics The Two-Body Problem The Three-Body Problem.
Particle dispersion in a turbulent vortex core

A study is performed using direct numerical simulation to examine the effect of turbulence on particle dispersion in a columnar vortex. A procedure is used to generate initial conditions in which turbulence external to the vortex has the wrapped, nearly azimuthal form characteristic of turbulence around a large-scale vortex structure. This approach enables control of the initial values of the external turbulence intensity and length scale for a given vortex size and strength. The effect of turbulence on dispersion of particles by the vortex flow is examined for a wide range of different values of the initial turbulence intensity. Cases both with zero mean axial flow and unstable vortices with nonzero mean axial flow are examined. The state of the external turbulence is determined by a balance between dissipation, stretching, and vorticity reorientation and stripping from the large-scale vortex core. We examine cases with peak initial turbulence kinetic energy differing by a ratio of up to 400, and for all.
Echelon stock formulation for multi-stage lot-sizing with component lead times

Abstract Material requirements planning of batch production in multi-stage manufacturing systems is discussed where component parts may have significant non-zero production or purchasing lead time. The presence of such lead time poses a synchronization problem for the rolling horizon planning of component part production in the system. The synchronization problem is analysed, discussed and modelled first for the case of assembly product structures where a component has a unique successor component. The analysis is then extended to the more complex case of general product structures where a component may have multiple successor components. The associated general structure multi-stage lot-sizing problem is then formulated as a mixed integer linear program first in terms of conventional stock, and then reformulated in terms of echelon stock. The echelon stock quantity of a component is its lead-time adjusted total system stock, counted both as a stand-alone component and as part of successor components. The .
Handbook of Human Vibration

Vibration and Human Responses. An Introduction to Whole-Body Vibration. Vibration Discomfort. Activity Interference Caused By Vibration. Whole-Body Vibration and Health. Perception of Whole-Body Vibration and the Assessment of Vibration in Buildings. Motion Sickness. Whole-Body Biodynamics. Seating Dynamics. Whole-Body Vibration Standards. Methods of Measuring and Evaluating Whole-Body Vibration Exposures. An Introduction to Hand-Transmitted Vibration. Vascular Disorders Associated with Hand-Transmitted Vibration. Non-Vascular Disorders Associated with Hand-Transmitted Vibration. Dose-Effect Relationship for Hand-Transmitted Vibration. Hand-Transmitted Vibration Standards. Limits and Compensation. Measurement and Evaluation of Hand-Transmitted Vibration Exposures. Preventative Actions for Hand-Transmitted Vibration. Appendix 1: Units, Multipliers, Symbols and Abbreviations. Appendix 2: Frequencies and Spectra. Appendix 3: Vibration Levels: The Use of Decibels. Appendix 4: National and International Standards. Appendix 5: Whole-Body Vibration and Health--Field Studies. Appendix 6: Examples of Vibration-Induced White Finger from the Use of Percussive Metal-Working Tools. Appendix 7: Examples of Vibration-Induced White Finger from the Use of Grinding and Other Rotary Tools. Appendix 8: Examples of Vibration-Induced White Finger from the Use of Pneumatic Hammers and Drills Such as Used in Mining Work. Appendix 9: Examples of Vibration-Induced White Finger from the Use of Chain Saws. Appendix 10: Examples of Bone and Joint Disorders in Users of Vibrating Tools. References. Glossary. Index.
Radiation in Gastroenterology

The benefit of radiation is immense in the field of gastroenterology. Radiation is used daily in different gastrointestinal imaging and diagnostic and therapeutic interventional procedures. Radiotherapy is one of the primary modalities of treatment of gastrointestinal malignancies. There are various modalities of radiotherapy. Radiotherapy can injure malignant cells by directly damaging DNA, RNA, proteins, and lipids and indirectly by forming free radicals. External beam radiation, internal beam radiation and radio-isotope therapy are the major ways of delivering radiation to the malignant tissue. Radiation can also cause inflammation, fibrosis, organ dysfunction, and malignancy. Patients with repeated exposure to radiation for diagnostic imaging and therapeutic procedures are at slightly increased risk of malignancy. Gastrointestinal endoscopists performing fluoroscopy-guided procedures are also at increased risk of malignancy and cataract formation. The radiological protection society recommends certain preventive and protective measures to avoid side effects of radiation. Gastrointestinal complications related to radiation therapy for oncologic processes, and exposure risks for patients and health care providers involved in diagnostic or therapeutic imaging will be discussed in this review.
HIGHER ORDER FDS SCHEME FOR RAPIDLY VARIED 2-D FLOW SIMULATIONS

Numerical models based on flux-difference splitting (FDS) technique are developed for simulating rapidly varied flows in two-dimensional space co-ordinates. A first-order accurate model using Roe's numerical flux and a second-order accurate scheme using Lax-Wendroff numerical flux are constructed. Roe's averaging for velocity and celerity ensures conservation and consistency while entropy satisfying solution is guaranteed by theoretically sound treatment. Flux limiters used in second-order accurate model yields oscillation-free results while maintaining high shock-resolution. The models' validity and applicability are demonstrated by comparing computed results with analytical and experimental results for some exacting hydraulic problems.
Numerous Proplyd Candidates in the Harsh Environment of the Carina Nebula

We report the discovery of dozens of compact objects in the Carina Nebula (NGC 3372) that closely resemble proplyds (photoablating protoplanetary disks and dark silhouette disks) seen previously in the Orion Nebula. This is the first detection of a large number of such objects outside Orion. They imply that low- and intermediate-mass star formation is proceeding actively in Carina, despite threatening conditions imposed by very hot massive stars. The proplyd candidates that we have detected are larger than those in Orion but more compact than irregular molecular globules within the H II region. Smaller proplyds may still be lurking in Carina, waiting to be discovered. Orion apparently lacks objects of comparable size, and we consider several explanations. Larger proplyds may come from larger and more massive circumstellar disks surrounding young Herbig Ae/Be stars that should be numerous in Carina. Alternatively, far-UV radiation from the massive star η Car may have, in the recent past, enhanced photoablation and expanded proplyd ionization fronts. Some unusual proplyd candidates may also imply that time-dependent effects associated with η Car's current evolutionary state may be critical.