Miracle-dz/UniFAR-FTUs huggingface dataset:
A spectral framework for NMR signal with restricted diffusion

By the multiple correlation function (MCF) formalism, the nuclear magnetic resonance magnetization of diffusing spins can be represented for simple pore geometries. It may be used to infer geometric structure at the scale of microns. This is to be compared to the diffusion tensor imaging, which provides geometric information at the scale of millimeters. The MCF formulation was derived to special cases in which the gradients of the magnetic field are oriented in specific directions. A generalized approach allowing an arbitrary magnetic field direction was introduced by Ozarslan. In this article, we present a complete account of the generalized MCF mathematical derivation starting from Bloch–Torrey equations. It is aimed to the experts and novices alike. We present two approaches—the indirect derivation is based on Ozarslan's work, where the standard MCF equations are adopted to arbitrary gradient directions. Our alternative approach is based on direct calculations of the MCF matrices for specified gradient directions. We prove that the two approaches lead to the same equations. Finally, we revise Mitra's microscopic approach and show the relation to the macroscopic MCF approach. We prove that in some limit conditions the two signal equations coincide © 2015 Wiley Periodicals, Inc. Concepts Magn Reson Part A 43A: 16–53, 2015.
Exploiting Linked Data-based Personalization Strategies for Recommender Systems

: People seek assertive and reliable recommendations to support their daily decision-making tasks. To this end, recommendation systems rely on personalized user models to suggest items to a user. Linked Data-driven systems are a kind of Web Intelligent systems, which leverage the semantics of links between resources in the RDF graph to provide metadata (properties) for the user modeling process. One problem with this approach is the sparsity of the user-item matrix, caused by the many different properties of an item. However, feature selection techniques have been applied to minimize the problem. In this paper, we perform a feature selection preprocessing step based on the ontology summary data. Additionally, we combine a personalization strategy that associates weights with relevant properties according to the user’s previous interactions with the system. These strategies together aim to improve the performance and accuracy of the recommender system, since only latent representations are processed by the recommendation engine. We perform several experiments on two publicly available datasets in the ﬁlm and music domains. We compare the advantages and disadvantages of the proposed strategies with non-personalized and non-preprocessed approaches. The experiments show signiﬁcant increases in top-n recommendation tasks in Precision@K (K=5, 10), Map, and NDCG.
An Empirical Study on the Effect of the Chinese Interest Rate Corridor on the Short-Term Interest Rate Fluctuation Based on EGAECH-M Model

— After nearly seven years of exploration, the Chinese interest rate corridor has basically formed. However, it is not perfect at present, and the effectiveness of the Chinese interest rate corridor regulation still needs to be discussed. Therefore, this paper uses the high-frequency data of the overnight Shibor and the overnight Chibor from January 1, 2010 to April 30, 2021 as research samples, and constructs EGARCH-M model for research. Then, using the parameter estimation results of the model to calculate the eigenvalues of the sample interest rate volatility, so as to analyze the impact of the Chinese interest rate corridor on the short-term interest rate fluctuation and explore the effectiveness of the Chinese interest rate corridor regulation. The results show that the Chinese interest rate corridor can effectively alleviate the fluctuation of the short-term market interest rate, it can be seen that the Chinese interest rate corridor is more effective in regulating the short-term interest rate fluctuation.
A solution of 3D Helmholtz equation for boundary geometry modeled by Coons patches using the Parametric Integral Equation System

In this paper, the authors propose an algorithm for numerical solution of the 3D Helmholtz equation using the Parametric Integral Equation System (PIES). The PIES, unlike the traditional Boundary Integral Equation (BIE), is characterized by the fact that the boundary geometry has been considered in its mathematical formalism. Polygonal Coons surfaces have been used to describe the 3D domain. This makes it possible to obtain continuous solutions without any discretization of the 3D domain.
Characterizing Open Government Data Available on the Web from the Quality Perspective: A Systematic Mapping Study

: Context: Data openness can create opportunities for new and disruptive digital services on the web that has the potential to beneﬁt the whole society. However, the quality of those data is a crucial factor for the success of any endeavor based on information made available by the government. Objective: Analyze the current state of the art of quality evaluation of open government data available on the web from the perspective of discoverability, accessibility, and usability. Methods: We performed a systematic mapping review of the published peer-reviewed literature from 2011 to 2021 to gather evidence on how practitioners and researchers evaluate the quality of open government data. Results: Out of 792 records, we selected 21 articles from the literature. Findings suggest no consensus regarding the quality evaluation of open government data. Most studies did not mention the dataset´s application domain, and the preferred data analysis approach mainly relies on human observation. Of the non-conformities cited, data discoverability and usability outstand from the others. Conclusions: There is also no consensus regarding the dimensions to be included in the evaluation. None of the selected articles reported the use of machine learning algorithms for this end.
Uniform Limit Theorems under length-biased sampling and type I censoring

In recent years, in view of theory of empirical processes, authors have become more interested in the uniform analogue of the three fundamental theorems: the uniform law of large numbers of Glivenko-Cantelli type, the uniform central limit theorem for Donsker type and the functional law of the iterated logarithm (LIL). In this paper, under the bracketing entropy conditions, the uniform law of large numbers, uniform central limit theorem and the uniform LIL of Strassen type have been investigated in the case of length-biased and type I censoring.
Mirror Options

In this work we present a new family of options (mirror options) specially crafted to satisfy the necessities of aggressive speculators. The main ideas behind mirror options are: 1) A product that can be adjusted by the holder to agree with his/her market view at any time during its life. 2) The holder’s right to make an arbitrary number of those adjustments without penalizing costs. After deﬁning mirror options as ‘super-versions’ of standard options we derive general formulae for their value in the case where the payoﬀ is a monotonic function of the underlying (which is the case in calls, puts, futures, spreads etc.). We brieﬂy discuss also their valuation for general payoﬀs and the American case. Finally we analyze the situation where the number of allowed adjustments is restricted and we point out directions for further developments.
The Behavioral Intention of Using Online Food Delivery Services During the COVID-19 Pandemic in Vietnam: A Test of Integrating TAM and HBM Framework

Growing internet technology has incurred variations in customer way of life and online shopping habits. Originating from the integrated framework of technology acceptance model and health belief model, the purpose of this study is to investigate the influence of determinants, such as perceived usefulness, perceived ease of use, trust, social influence, perceived susceptibility, and perceived severity on customers' intentions of using online food delivery (OFD) services. By employing a total of 459 usable responses in Vietnam, the research hypotheses were empirically validated using structural equation modeling (SEM) approach. The results of this study exhibited that the constructs all have positive influences on the usage behavior of OFD services, while perceived ease of use is found to influence users' perceived usefulness. This study complements key insights into the literature on the acceptance of technology during the pandemic in general, the online food delivery technology in particular.
ΛCDM predictions for the satellite population of M33

Triangulum (M33) is the most massive satellite galaxy of Andromeda (M31), with a stellar mass of about $3\times10^9\; M_{\odot}$. Based on abundance matching techniques, M33's total mass at infall is estimated to be of order $10^{11}\; M_{\odot}$. $\Lambda$CDM simulations predict that M33-mass halos host several of their own low mass satellite companions, yet only one candidate M33 satellite has been detected in deep photometric surveys to date. This `satellites of satellites' hierarchy has recently been explored in the context of the dwarf galaxies discovered around the Milky Way's Magellanic Clouds in the Dark Energy Survey. Here we discuss the number of satellite galaxies predicted to reside within the virial radius ($\sim$160 kpc) of M33 based on $\Lambda$CDM simulations. We also calculate the expected number of satellite detections in N fields of data using various ground--based imagers. Finally, we discuss how these satellite population predictions change as a function of M33's past orbital history. If M33 is on its first infall into M31's halo, its proposed satellites are expected to remain bound to M33 today. However, if M33 experienced a recent tidal interaction with M31, the number of surviving satellites depends strongly on the distance achieved at pericenter due to the effects of tidal stripping. We conclude that a survey extending to $\sim$100 kpc around M33 would be sufficient to constrain its orbital history and a majority of its satellite population. In the era of WFIRST, surveys of this size will be considered small observing programs.
Are subjective cognitive complaints relevant in preclinical Alzheimer’s Dementia? A review and guidelines for healthcare professional

Identifying what makes people vulnerable to developing Alzheimer's disease (AD) is at the forefront of many research programmes, while early diagnosis is the goal in clinical practice. What individuals themselves tell their general practitioners (GPs) is clearly important because these subjective complaints may be a clue that something is wrong. More specifically, subjective cognitive complaints (SCC) may be the first sign of AD in individuals whose cognitive performance on standard neuropsychological tasks is normal for their age. The challenge for researchers in this field is twofold: (a) determining when SCC do or do not predict current cognitive functioning and future dementia; and (b) estimating how relevant they are for patients and their proxies. The current article addresses these issues, while guidelines are also provided in an attempt to help clinicians interpret and make treatment decisions about their patients’ SCC.
Fermi-liquid interactions and the superfluid density in d -wave superconductors

We construct a phenomenological superfluid Fermi-liquid-theory for a two-dimensional d-wave superconductor on a square lattice, and study the effect of quasiparticle interactions on the superfluid density. Using simple models for the dispersion and the Landau interaction function, we illustrate the deviation of these results from those for the isotropic superfluid. This allows us to reconcile the value and doping dependence of the superfluid density slope at low temperature obtained from penetration depth measurements, with photoemission data on nodal quasiparticles.
Supershell structure in trapped dilute Fermi gases

We show that a dilute harmonically trapped two-component gas of fermionic atoms with a weak repulsive interaction has a pronounced super-shell structure: The shell fillings due to the spherical harmonic trapping potential are modulated by a beat mode. This changes the "magic numbers" occurring between the beat nodes by half a period. The length and amplitude of this beating mode depend on the strength of the interaction. We give a simple interpretation of the beat structure in terms of a semiclassical trace formula for the symmetry breaking U(3)-> SO(3).
Tackling Public Service Delivery Challenges Through Appropriate Work Ethics in Nigeria

This study focuses not only on identifying the ethical challenges hindering public service delivery but to state how these challenges can be tackled to bring out the desired service delivery demanded by the citizens. Also, this studyproffer suggestions on the work ethics mechanisms that can be employed to enhance the service delivery. The Ekiti State University Teaching Hospital (EKSUTH), Ado-Ekiti, Nigeria was used as the study area and it adopted the cross-sectional survey research design. The primary source of data was obtained from the administration of questionnaires to both EKSUTH staff (administrative and clinical departments) and EKSUTH out-patients followed by an in-depth interview with four administrative and four clinical staff. The Pearson Product Moment Correlation, Linear Regression Analysis, and One Sample T-test Analysis were used to test the various hypotheses, and the study findings reveals that there is a link between work ethics and service delivery, also, a proper implementation of standard work ethics can lead to increased efficiency in the public sector. Based on these observations, the researcher suggests that EKSUTH Management should bring up strategical ways in improving the work ethics that would bring about the desired public service delivery.
Network topology of the interbank market

We provide an empirical analysis of the network structure of the Austrian interbank market based on Austrian Central Bank (OeNB) data. The interbank market is interpreted as a network where banks are nodes and the claims and liabilities between banks define the links. This allows us to apply methods from general network theory. We find that the degree distributions of the interbank network follow power laws. Given this result we discuss how the network structure affects the stability of the banking system with respect to the elimination of a node in the network, i.e. the default of a single bank. Further, the interbank liability network shows a community structure that exactly mirrors the regional and sectoral organization of the current Austrian banking system. The banking network has the typical structural features found in numerous other complex real-world networks: a low clustering coefficient and a short average path length. These empirical findings are in marked contrast to the network structures that have been assumed thus far in the theoretical economic and econo-physics literature.
The slot gap model of pulsars

A general picture of pulsar magnetospheres is outlined which suggests polar current flow should proceed within a magnetic flux tube with conducting boundaries. The dynamics of this current flow is con­ sidered, including the effect of formation of pair plasma on the poten­ tial. A slot gap surrounding the stream of pair plasma is described, and the electric fields and J E work done in the gap are calculated. The inapplicability of curvature emission to the formation of y-ray pul­ ses is discussed. The dynamics of pair plasma flow is described, in­ cluding electrostatic trapping of low energy positrons, polar cap bom­ bardment and heating, and the emission of soft X-rays from the cap. The relation of this current flow and polar cap heating to the formation of fluctuations on the radio subpulse time scale is also described. The importance of the boundary layer between the pair plasma and the slot gap is illustrated by calculations of the boundary layer structure and microscopic instability, which show that this region may be the source of pulsar emission. I will describe a number of quantitative results and qualitative aspects of work in progress on the "slot gap" model for the emission regions of a pulsar, proposed by Arons and Scharlemann (1979, hereafter AS) and by Arons (1979b, hereafter I). The results and ideas concern the dynamics and emission physics of relativistic plasma and current flow along the polar field lines of an isolated, rotating magnetized neutron star with the axis of its dipole moment oblique to the rotation axis a pulsar. The quantitative modelling is confined to the physics within a polar flux tube and is therefore "local". Full detail will be given in papers now being written. However, development of this type of model requires the use of boundary conditions which follow from a qualitative
Proceso de adaptación internacional de autoexpatriados. Estudio sobre practicantes españoles en Alemania

Los movimientos migratorios de España a Alemania han vuelto a ganar relevancia en los últimos cinco años, debido principalmente a las altas tasas de paro españolas y a los esfuerzos alemanes por atraer a personal cualificado para sus empresas. Sin embargo, algunos expertos señalan que la movilidad laboral internacional no está exenta de retos para trabajadores y organizaciones, si el proceso no se gestiona eficazmente. En España, uno de los grupos más afectados por el desempleo es el de los menores de 25 años, por lo que sus desplazamientos para trabajar en el extranjero se están incrementando. Esta investigación se centra en el proceso de adaptación de esta población en Alemania. En concreto, se seleccionó una muestra de 10 jóvenes estudiantes de Formación Profesional que, por iniciativa propia, decidieron hacer prácticas en empresas en Alemania. Se analiza su proceso de adaptación en los llamados tres grados de ajuste internacional: en el trabajo, en su interacción con los individuos del país extranjero y en general en la cultura del nuevo país. En este estudio se utiliza como marco teórico el Modelo del proceso de adaptación internacional de Black, Mendenhall y Oddou (1991). Cabe destacar que esta investigación es un estudio longitudinal, ya que se recogieron datos en tres periodos de tiempo: antes de desplazarse a Alemania (P1), al mes de estar realizando las prácticas (P2), y pasados tres meses, al finalizar la estancia (P3). La metodología utilizada es el estudio de casos, utilizando cuestionarios semiestructurados en los tres periodos y una discusión grupal final. Los resultados confirman la validez general del Modelo de Black y col. (1991) para la muestra y destacan la importancia de ciertos factores en la adaptación internacional. En la fase previa sobresalen: proceso de selección, competencias lingüísticas y expectativas realistas. Una vez en el extranjero, las variables más significativas son: el apoyo social y claridad de rol.
Foundations of Special Relativity and the Principle of Conservation of Information

The theory of special relativity can be generalized by means of a new principle called Conservation of Information. This allows a derivation of the constancy of the velocity of light with respect to moving frames, and, consequently, of Einstein's special relativity. The analysis is based on a review of the concept of observer. It is put forward that observers are not uniquely defined and that an observational asymmetry, defined by the different ways in which light influences observations, lies at the origin of the non-absolutism of time. This observational difference is a kinematic condition, not an exclusive result for light, implying that non-absolutism of time may have a cause different from the electromagnetic nature of light. The Lorentz transformations are rederived and different concepts of the velocity of light, relative to different classes of observers, are considered.
ANALYSIS OF THE SUPER TYPHOON RAI-INDUCED INFRASTRUCTURE DAMAGE IN SEVERELY AFFECTED AREAS OF CARAGA REGION, PHILIPPINES USING SENTINEL-1 SAR IMAGERIES

Abstract. The Philippines is prone to typhoons because of how it is geographically located around the globe. A recent event that devastated many parts of Mindanao and Visayas was super typhoon Odette with the international name “Rai. ” It was estimated that damage to infrastructures equates to over P17.71 billion as of January 10, 2022, and that Caraga Region has suffered the most significant loss totalling more than P12.82 billion. Due to the large-scale incurred damages, the number of people who were affected and suffered heavy economic loss, it is necessary to find ways that would provide spatial information to help decision-makers, stakeholders, and emergency respondents to prioritize areas which need the utmost concern. Over the past years, damage assessment maps were derived from optical images, which are weather-dependent and free. However, appropriate satellite images are hard to come by, especially during typhoons where clouds are prominent. Sentinel-1 SAR imagery was used because of its unique characteristics. It is not weather-dependent, before and after images from the event are available, and it is an open-source data. Damage maps were generated by detecting the change in the complex coherence between pre-and co-typhoon stacked images. Results were validated using high-resolution satellite images from reliable sources, finding out that there is good correspondence between the coherence-based change images and ground data depicted from high-resolution satellite images. It is concluded that Sentinel-1 SAR imagery could capture the extent of damages and help provide timely and accurate geospatial information during catastrophic events.
Synergistic Approach of Interfacial Layer Engineering and READ-Voltage Optimization in HfO2-Based FeFETs for In-Memory-Computing Applications

This article reports an improvement in the performance of the hafnium oxide-based (HfO2) ferroelectric field-effect transistors (FeFET) achieved by a synergistic approach of interfacial layer (IL) engineering and READ-voltage optimization. FeFET devices with silicon dioxide (SiO2) and silicon oxynitride (SiON) as IL were fabricated and characterized. Although the FeFETs with SiO2 interfaces demonstrated better low-frequency characteristics compared to the FeFETs with SiON interfaces, the latter demonstrated better WRITE endurance and retention. Finally, the neuromorphic simulation was conducted to evaluate the performance of FeFETs with SiO2 and SiON IL as synaptic devices. We observed that the WRITE endurance in both types of FeFETs was insufficient to carry out online neural network training. Therefore, we consider an inference-only operation with offline neural network training. The system-level simulation reveals that the impact of systematic degradation via retention degradation is much more significant for inference-only operation than low-frequency noise. The neural network with FeFETs based on SiON IL in the synaptic core shows 96% accuracy for the inference operation on the handwritten digit from the Modified National Institute of Standards and Technology (MNIST) data set in the presence of flicker noise and retention degradation, which is only a 2.5% deviation from the software baseline.
Temperature compensated bulk acoustic thin film resonators

Thin film resonators have been made that exhibit a high degree of temperature compensation. These resonators are composed of piezoelectric aluminum nitride films, aluminum top and bottom electrodes, and are compensated with layers of silicon dioxide within the resonator. The resonators are fabricated with the solidly mounted resonator (SMR) configuration using a sequence of aluminum nitride and silicon dioxide reflector layers. Silicon dioxide has a positive temperature coefficient and can be used to offset the -25 ppm per degree C coefficient of aluminum nitride. Results are reported on hermetic packaging, temperature cycle testing, temperature coefficient measurements, and preliminary ageing.