Miracle-dz/UniFAR-FTUs huggingface dataset:
GENERALIZED GENERAL RELATIVISTIC MAGNETOHYDRODYNAMIC EQUATIONS AND DISTINCTIVE PLASMA DYNAMICS AROUND ROTATING BLACK HOLES

To study phenomena of plasmas around rotating black holes, we have derived a set of 3+1 formalism of generalized general relativistic magnetohydrodynamic (GRMHD) equations. In particular, we investigated general relativistic phenomena with respect to the Ohm's law. We confirmed the electromotive force due to the gravitation, centrifugal force, and frame-dragging effect in plasmas near the black holes. These effects are significant only in the local small-scale phenomena compared to the scale of astrophysical objects. We discuss the possibility of magnetic reconnection, which is triggered by one of these effects in a small-scale region and influences the plasmas globally. We clarify the conditions of applicability of the generalized GRMHD, standard resistive GRMHD, and ideal GRMHD for plasmas in black hole magnetospheres.
Examples of reflection positive field theories

The requirement of reflection positivity (RP) for Euclidean field theories is considered. This is done for the cases of a scalar field, a higher derivative scalar field theory and the scalar field theory defined on a non-integer dimensional space (NIDS). It is shown that regarding RP, the analytical structure of the corresponding Schwinger functions plays an important role. For the higher derivative scalar field theory, RP does not hold. However for the scalar field theory on a NIDS, RP holds in a certain range of dimensions where the corresponding Minkowskian field is defined on a Hilbert space with a positive definite scalar product that provides a unitary representation of the Poincare group. In addition, and motivated by the last example, it is shown that, under certain conditions, one can construct non-local reflection positive Euclidean field theories starting from the corrected two point functions of interacting local field theories.
A Digitally-Controlled Fully Differential Low Noise Current Source

In this paper a digitally-controlled fully differential low-noise current source is presented. It was developed for sensor excitation, however, the concept is applicable wherever a precise digitally-controlled current source is required. The current source is based on a two-stage cascaded $\Delta \Sigma$ modulator using a current-steering digital-to-analog converter and a novel current amplifier that generates a scaled replica of the output current of the DAC. The D/A conversion is done by 64 unary current cells that are controlled by a timing optimized switch driver. To reduce the flicker noise the current cells are chopped using two banks of current cells, that are activated alternatingly. The proposed fully differential current amplifier uses only a single operational amplifier to deliver a filtered and scaled output current. Thus the typically required intermediate transimpedance amplifier is eliminated, which results in an increased noise performance and a reduced power consumption. The current source has a simulated total harmonic distortion of 99.5dB and a simulated signal-to-noise ratio of 116dB. The proposed circuit was implemented in a 180nm CMOS technology and occupies an area of 1.35 mm2.
Decomposition of subsets of finite fields

We extend a bound of Roche-Newton, Shparlinski and Winterhof which says any subset of a finite field can be decomposed into two disjoint subset $\cU$ and $\cV$ of which the additive energy of $\cU$ and $f(\cV)$ are small, for suitably chosen rational functions $f$. We extend the result by proving equivalent results over multiplicative energy and the additive and multiplicative energy hybrids.
Pulse Width Modulation for Speeding Up Quantum Optimal Control Design

This paper focuses on accelerating quantum optimal control design for complex quantum systems. Based on our previous work [{arXiv:1607.04054}], we combine Pulse Width Modulation (PWM) and gradient descent algorithm into solving quantum optimal control problems, which shows distinct improvement of computational efficiency in various cases. To further apply this algorithm to potential experiments, we also propose the smooth realization of the optimized control solution, e.g. using Gaussian pulse train to replace rectangular pulses. Based on the experimental data of the D-Norleucine molecule, we numerically find optimal control functions in $3$-qubit and $6$-qubit systems, and demonstrate its efficiency advantage compared with basic GRAPE algorithm.
Anisotropic Flow in the Few Collisions Regime: Application to Bottomonia

Considering the kinetic Boltzmann equation in the limit of very few collisions, we study the evolution of the phase space distribution of bottomonia interacting with an expanding gas of massless partons. We investigate the scaling of the anisotropic flow coefficients on the initial eccentricities and the inverse Knudsen number, and compute their transverse momentum dependence.
Factors Affecting Customers' Adoption of Internet Banking in Afghanistan

In recent decades advances in technology have changed the banking industry. The advancement of e-commerce and e-society is dependent on electronic banking, particularly internet banking. This rapid advancement of computer technology, especially the internet, has enabled the banking industry to provide services to customers more efficiently and efficiently. However, the main problem of Internet banking faced by internet banking providers in Afghanistan is that many of the banks' customers are unwilling to adopt the Internet banking services offered. This happened due to various factors. This can be because of customers' personal experiences, awareness, level of internet access, and diverse socio-cultural backgrounds. Therefore, this research aims to identify the factors that affect customers' adoption of internet banking in Afghanistan. In this study, the factors which can influence customer adoption of Internet banking include perceived usefulness, perceived ease of use, attitude, and intention. In this study, a survey questionnaire was distributed among 184 Afghan participants and provided valuable feedback and responses about the above factors that affect customers' adoption of Internet banking. The results from this study indicated that among the studied variables, perceived usefulness, ease of use, attitude, and intention were closely linked to internet banking adoption in Afghanistan. The results of the present study may provide valuable practical implications for banks and financial industries. It also helps banks to understand the significant factors in providing efficient internet banking services to the Afghan community.
Spectral and temporal properties of the supergiant fast X-ray transient IGR J18483–0311 observed by INTEGRAL

Context. IGR J18483−0311 is a supergiant fast X-ray transient whose compact object is located in a wide (18.5 d) and eccentric (e ∼ 0.4) orbit, which shows sporadic outbursts that reach X-ray luminosities of ∼10 36 erg s −1 . Aims. We investigated the timing properties of IGR J18483−0311 and studied the spectra during bright outbursts by fitting physical models based on thermal and bulk Comptonization processes for accreting compact objects. Methods. We analysed archival INTEGRAL data collected in the period 2003–2010, focusing on the observations with IGR J18483−0311 in outburst. We searched for pulsations in the INTEGRAL light curves of each outburst. We took advantage of the broadband observing capability of INTEGRAL for the spectral analysis. Results. We observed 15 outbursts, seven of which we report here for the first time. This data analysis almost doubles the statistics of flares of this binary system detected by INTEGRAL. A refined timing analysis did not reveal a significant periodicity in the INTEGRAL observation where a ∼21 s pulsation was previously detected. Neither did we find evidence for pulsations in the X-ray light curve of an archival XMM-Newton observation of IGR J18483−0311. In the light of these results the nature of the compact object in IGR J18483−0311 is unclear. The broadband X-ray spectrum of IGR J18483−0311 in outburst is well fitted by a thermal and bulk Comptonization model of blackbody seed photons by the infalling material in the accretion column of a neutron star. We also obtained a new measurement of the orbital period using the Swift/BAT light curve.
Numerical analysis of the emission properties of terahertz photoconductive antenna by finite-difference-time-domain method

The emission properties of terahertz(THz) photo- conductive antenna (PCA) have been numerically studied by three-dimensional nite-dierence-ti me-domain method based on the full-wave model. The dependence of the THz radiation on various parameters, such as laser power, bias voltage, sub- strate's material, pulse duration of the laser, beam spot's size, dimension of the antenna, were comprehensively simulated and analyzed. This work, on one hand, reveals the internal rela- tionship between the THz radiation of a PCA and the involved parameters, so that one can have a better understanding of the PCA. On the other hand, it can inspire new PCA's design that aims at improved performance, such as high radiation power, enhanced optics-to-THz conversion eciency, and broadband spectrum.
Fault-Tolerant Concurrent Data collection Trees for Industrial IoT Applications

Industrial Internet of things (IIoT) refers to a network of industrial devices, equipped with a multitude of sensors that are connected to the Internet. The data generated by these devices can be accessed by multiple applications simultaneously necessitating concurrent data-collection. With shared device infrastructure and devices being power-constrained, the probability of device failures due to battery exhaustion is high, thus resulting in partitioned network topology and impacting data collection. Furthermore, the network-topology reconstruction process is also energy-consuming. In this paper, we propose a fault-tolerant concurrent data collection process. We show through simulations how the proposed algorithm handles device failures without affecting the overall data-collection time.
Improved measurement of absolute hadronic branching fractions of the Ds+ meson

The branching fractions of Ds meson decays serve to normalize many measurements of processes involving charm quarks. Using 586 pb^-1 of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for 13 Ds decays in 16 reconstructed final states with a double tag technique. In particular we make a precise measurement of the branching fraction B(Ds -> K- K+ pi+) = (5.55 +- 0.14 +- 0.13)%, where the uncertainties are statistical and systematic respectively. We find a significantly reduced value of B(Ds -> pi+ pi0 eta') compared to the world average, and our results bring the inclusively and exclusively measured values of B(Ds -> eta' X)$ into agreement. We also search for CP-violating asymmetries in Ds decays and measure the cross-section of e+ e- -> Ds* Ds at Ecm = 4.17 GeV.
THE PHOTOEVAPORATIVE WIND FROM THE DISK OF TW Hya

Photoevaporation driven by the central star is expected to be a ubiquitous and important mechanism for dispersing the circumstellar dust and gas from which planets form. Here, we present a detailed study of the circumstellar disk surrounding the nearby star TW Hya and provide observational constraints to its photoevaporative wind. Our new high-resolution (R ∼ 30,000) mid-infrared spectroscopy in the [Ne ii] 12.81 μm line confirms that this gas diagnostic traces the unbound wind component within 10 AU of the star. From the blueshift and asymmetry in the line profile, we estimate that most (>80%) of the [Ne ii] emission arises from disk radii where the midplane is optically thick to the redshifted outflowing gas, meaning beyond the 1 or 4 AU dust rim inferred from other observations. We re-analyze high-resolution (R ∼ 48,000) archival optical spectra searching for additional transitions that may trace the photoevaporative flow. Unlike the [Ne ii] line, optical forbidden lines from O i, S ii, and Mg i are centered at stellar velocity and have symmetric profiles. The only way these lines can trace the photoevaporative flow is if they arise from a disk region physically distinct from that traced by the [Ne ii] line, specifically from within the optically thin dust gap. However, the small (∼10 km s−1) FWHM of these lines suggests that most of the emitting gas traced at optical wavelengths is bound to the system rather than unbound. We discuss the implications of our results for a planet-induced gap versus a photoevaporation-induced gap.
Impact of Information Technology Capabilities of Government: Case Study From OKU Regency

The rapid advance in information and communication technology development has greatly facilitated the development of electronic government worldwide. This can be seen from the various applications of information technology in government agencies, including measuring electronic performance (e-kinerja). E-kinerja is a performance assessment for state civil servants which is carried out electronically or on a website. This study aims to evaluate IT capability owned by state civil servants in the use and utilization of e-kinerja applications on the performance of civil servants implemented in Ogan Komering Ulu Regency. A survey is used in this research to collect data in whole government agencies, Ogan Komering Ulu Regency. The research findings indicate that there are six indicators on the dimensions of IT infrastructure capability that encourage human resource success in using e-kinerja, namely, interconnectivity, flexible, real-time, transparent, intensive, and the old system. Furthermore, the IT personal capability dimension consists of cross-trained, expert, skill, know about product, key factors, and understand the environment. The last dimension is IT management capability which consists of update, evaluation, contribution, manage, trust and share freely. Therefore, the research findings can help the government to encourage the improvement of the performance of the state civil apparatus in providing the public service to citizen of the Ogan Komering Ulu Regency
Reliability and Lifetime Estimation of Sintered Silver Die Attach for Different Accelerated Testing Conditions

The paradigm change from empirical lifetime models to a physics-of-failure based approach for automotive power electronics is driven by need for higher power densities. Hence, the usage of wide-bandgap semiconductor materials is necessary. This is accompanied by higher requirements on the packaging technologies, especially the die attach, in terms of electrical, thermal and mechanical properties. A die attach material meeting these demands is sintered silver which is already widely-used in automotive power electronics. In this study, passive thermal cycling experiments for different die sizes are performed and corresponding finite element simulations are used to find relative correlations.
Measuring e-Loyalty in the Greater Jakarta Online Marketplace-Indonesia

Internet speed and business competitiveness are driving all business transactions to the online marketplace, or e-commerce. The expansion of e-commerce trends is not limited to large cities alone. This study aims to examine the impact of e-loyalty on the online marketplace. This study employs the quantitative-associative and purposive sampling methodologies. All data is collected through an online survey administered to customers of an online marketplace. Analysis is performed on the 323 respondents who fill out the survey in its entirety. This study demonstrates that brand equity, customer experience, and e-trust influence e-loyalty.
ReverSearch: Search-based energy-efficient Processing-in-Memory Architecture

Recent development of the processing-in-memory (PIM) architecture has demonstrated high efficiency by reducing data movements. However, the performance of the conventional PIM architecture is limited by several issues, including frequent bit-line operations, complicated control of data flow, and massive inter-macro data movements. In addition, both analog- and digital-PIM solutions have obstacles to meet requirement of high-precision computation. In this work, we explore the tradeoff between data movement and energy efficiency of PIM architecture. We develop a PIM architecture, namely ReverSearch, to accelerate multiple-and-accumulate operation, equipped with reverse searching engine and look up table operations. Also, the corresponding data mapping and data flow methods are provided to improve the performance of the ReverSearch architecture. Based on our evaluation, ReverSearch improves the energy efficiency by 17.26 × and 3.68 ×, compared to the baseline of LUT-Cache [1] and LAcc [2].
Effects of IT Service Management on E-Learning Readiness through the HOT-Fit Model

The majority of private universities are prone to encounter gaps and incompletely realize contributions and effects of IT service management on e-learning readiness. So far, the focus of this readiness has been more on online learning processes and mechanisms. Distributing knowledge through electronic media regardless of time and locations, therefore, becomes existing limitation. This study objective was on confirmation and ascertainment of the extent of IT service management in positively influencing e-learning readiness through the HOT-Fit model. The researchers applied a survey method with an explanatory design and a follow-up explanation model. There were questionnaires successfully completed and submitted by 298 respondents who were in association with special schools of informatics skills and computing in West Kalimantan. Likert scales were used to process the whole data collected and the SEM-PLS method was used for analyses. Meanwhile, bootstrapping was applied for data distribution in terms of normality. Finally, a feedback process lasted. Outcomes represent that IT service management is a crucial factor and technology is no longer a factor determining the success of implementing e-learning readiness with very high predictive relevance (99%).
Analog Correlator by a Dynamically-Reconfigured Switched-Capacitor Circuit

From the viewpoint of power consumption, some systems for ‘Internet-of-Things’ with fast A/D converter (ADC) + many code lines are changing to slow ADC with analog pre-processor, plus shorter code. This paper proposes an analog correlator for such systems, where one series to correlate is stored in memory. The technique makes use of reconfigurability of a programmable switched-capacitor circuitry. Experimental results by a Fourier transformer prototyped on a commercial chip is presented. The method is shown advantageous in speed (three-times faster with the same power), as well as in power (27% less).
Gamification Reward in Indonesia's e-wallet Market

There is a growing trend of implementing a reward program in e-wallet market in Indonesia with a gamification concept. Understanding innovation adoption towards program can help to see the program performance from users' perspective. The objective of this research to investigate users' innovation and adoption towards the reward program with perceived attributes of innovation from Diffusion of Innovation (DOI) theory by using Exploratory Factor Analysis and Binary Logistic Regression and using the demographic variables to see the association between those variables towards the innovation adoption. This study is done by conducting a cross-sectional survey of 697 users in Indonesia to represent Indonesia's market. Among all variables, Relative Advantage, Compatibility and Trialability significantly influence the innovation adoption. This research results can help e-wallet company to determine the next move by considering the program's innovation adoption.
Analysis of E-Government Service Quality using E-GovQual and Importance Performance Analysis (IPA)

Government instructions in implementing E-government in Indonesia have been regulated in presidential instructions No. 3 of 2013. The West Sumatra Province is the province that has implemented the instruction by providing various kinds of online-based public services. This can be seen on the West Sumatra Provincial Government website with the domain www.sumbarprov. go.id. However, the site visitors tend to decrease about 58.7% as shown in the period of December 2021 to February 2022, in the meantime the system has never been evaluated and assessed in terms of quality of its services based on user perceptions, so it is not yet known what factors affect service quality and what improvements need to be made to improve the website quality. This study uses the E-GovQual method combined with Importance Performance Analysis (IPA). This study uses 5 E-GovQual variables, namely efficiency, trust, reliability, citizen support and user satisfaction variables to measure user satisfaction with E-GovQual. Respondents used in this study amounted to 230 people. The data obtained from the distribution of previous questionnaires have been tested for validity and reliability. The results of this study indicate that the overall level of conformity is 71.7% while the gap value is −1.28%. The results of this study indicate that the overall service quality of the E-Government website in West Sumatra Province has not met user expectations. The recommendations for improvement are carrying out periodic maintenance, updating the website domain, changing the appearance of the website to a minimalist, disseminating information about the security of user data, and increasing service interaction with users.
Astronomical orientations in sanctuaries of Daunia

Prehistoric sanctuaries of Daunia date back several thousand years. During the Neolithic and Bronze Age the farmers in that region dug hypogea and holes whose characteristics suggest a ritual use. In the present note we summarize the results of the astronomical analysis of the orientation of the row holes in three different sites, and we point out the possible use of the setting of the stars of Centaurus. An interesting archaeological confirmation of an archaeoastronomical prediction is also reported.
Size-independent shear band formation in amorphous nanowires made from simulated casting

Molecular dynamics simulations indicate that surfaces strongly influence the strain localization behavior of amorphous nanowires in tension. A sample preparation routine that simulates casting was employed to facilitate the relaxation of the sample surface. Samples as short as 15 nm (7.5 nm in diameter) form dominant shear bands during deformation. The elastic energy release during plastic deformation is sufficient to provide the excess potential energy required for the shear band nucleation at rather small sample sizes. The results show that shear band formation is almost size-independent and is bounded only by its own length scale.
Renormalization of subleading dijet operators in soft-collinear effective theory

We calculate the anomalous dimensions of the next-to-leading order dijet operators in soft-collinear effective theory (SCET). We use a formulation of SCET where the Lagrangian is multiple copies of QCD and the interactions between sectors occur through light-like Wilson lines in external currents. We introduce a small gluon mass to regulate the infrared divergences of the individual loop diagrams in order to properly extract the ultraviolet divergences. We discuss this choice of infrared regulator and contrast it with the $\delta$-regulator. Our results can be used to increase the theoretical precision of the thrust distribution.