Miracle-dz/UniFAR-FTUs huggingface dataset:
Algebraic Aspects of Multi-Particle Quantum Walks

A continuous time quantum walk consists of a particle moving among the vertices of a graph G. Its movement is governed by the structure of the graph. More formally, the adjacency matrix A is the Hamiltonian that determines the movement of our particle. Quantum walks have found a number of algorithmic applications, including unstructured search, element distinctness and Boolean formula evaluation. We will examine the properties of periodicity and state transfer. In particular, we will prove a result of the author along with Godsil, Kirkland and Severini [28], which states that pretty good state transfer occurs in a path of length n if and only if the n + 1 is a power of two, a prime, or twice a prime. We will then examine the property of strong cospectrality, a necessary condition for pretty good state transfer from u to v. We will then consider quantum walks involving more than one particle. In addition to moving around the graph, these particles interact when they encounter one another. Varying the nature of the interaction term gives rise to a range of di↵erent behaviours. In particular, the particles can take on the characteristics of Fermions or Bosons. We will introduce a graph invariant proposed by Gamble, Friesen, Zhou, Joynt and Coppersmith [22]. This invariant takes the entries of the k-particle transition matrix as a list. A second invariant, due to Emms, Hancock, Severini and Wilson [17], is based on the discrete time quantum walk on a graph. One of the objectives of the sections that follow will be to characterize the strength of these two graph invariants. Cellular algebras are complex-valued matrix algebras that are closed under Schur multiplication and transposition. They were first studied by Weisfeiler and Lehman [40], as well as Higman [30]. With any graph G, we can associate a cellular algebra W = W (G). We define the k-extension c W (k) of W for any positive integer k. We show that, if two graphs yield isomorphic kextensions, then the k-particle invariant of Gamble et al. cannot distinguish the graphs. Similarly, if the 2-extensions of a pair of graphs are isomorphic, the invariant of Emms et al. cannot distinguish them. Finally, we give constructions for pairs of non-isomorphic graphs with isomorphic k-extensions for any positive integer k. Both of these results, along with the constructions, are the work of the author. Let A be an association scheme of n ⇥ n matrices. Then, any element of A can act on the space of n ⇥ n matrices by left multiplication, right v multiplication, and Schur multiplication. The set containing these three linear mappings for all elements ofA generates an algebra. This is an example of a Jaeger algebra. Although these algebras were initially developed by François Jaeger in the context of spin models and knot invariants, they prove to be useful in describing multi-particle walks as well. We will focus on triply-regular association schemes, proving several new results regarding the representation of their Jaeger algebras. As an example, we present the simple modules of a Jaeger algebra for the 4-cube.
Multidimensional multiresolution analysis of array ECG signals during PTCA procedures

To obtain a more complete picture of cardiac electrical activity, data is acquired from an array of electrodes on the torso surface during a clinical procedure in which a balloon is inflated in an artery to clear obstructions. The goal is to analyze the data and extract features which reveal the occurrence and location of the balloon inflation, and to relate these features to underlying physiological changes. A multidimensional time and space wavelet transform is applied to the data to enable extraction of relevant features. Both scaling and wavelet coefficients contain useful information. <<ETX>>
On the metallicity of open clusters. III. Homogenised sample

Open clusters are known as excellent tools for various topics in Galactic research. For example, they allow accurately tracing the chemical structure of the Galactic disc. However, the metallicity is known only for a rather low percentage of the open cluster population, and these values are based on a variety of methods and data. Therefore, a large and homogeneous sample is highly desirable. In the third part of our series we compile a large sample of homogenised open cluster metallicities using a wide variety of different sources. These data and a sample of Cepheids are used to investigate the radial metallicity gradient, age effects, and to test current models. We used photometric and spectroscopic data to derive cluster metallicities. The different sources were checked and tested for possible offsets and correlations. In total, metallicities for 172 open cluster were derived. We used the spectroscopic data of 100 objects for a study of the radial metallicity distribution and the age-metallicity relation. We found a possible increase of metallicity with age, which, if confirmed, would provide observational evidence for radial migration. Although a statistical significance is given, more studies are certainly needed to exclude selection effects, for example. The comparison of open clusters and Cepheids with recent Galactic models agrees well in general. However, the models do not reproduce the flat gradient of the open clusters in the outer disc. Thus, the effect of radial migration is either underestimated in the models, or an additional mechanism is at work. [abridged]
S+is state with broken time-reversal symmetry in Fe-based superconductors

We analyze the evolution of the superconducting gap structure in strongly hole doped Ba_{1-x}K_xFe_2As_2 between x=1 and x ~ 0.4 (optimal doping). In the latter case, the pairing state is most likely s+-, with different gap signs on hole and electron pockets, but with the same signs of the gap on the two Gamma-centered hole pockets (a ++ state on hole pockets). In a pure KFe_2As_2 (x=1), which has only hole pockets, laser ARPES data suggested another s+- state, in which the gap changes sign between hole pockets (a +- state). We analyze how ++ gap transforms into a +- gap as x -> 1. We found that this transformation occurs via an intermediate s+is, state in which the gaps on the two hole pockets differ in phase by `phi', which gradually involves from `phi' = pi (the +- state) to phi =0 (the ++ state). This state breaks time-reversal symmetry and has huge potential for applications. We compute the dispersion of collective excitations and show that two different Leggett-type phase modes soften at the two end points of TRSB state.
Biopolymers

The structures of the three major classes of biopolymers-polynucleotides, polypeptides and polysaccharides-are surveyed in the light of the most recent results from X-ray diffraction, electron microscopy and other studies. The review contains an introductory section setting out the basic features of each class of biopolymer: the natures of the 'building blocks', the linkages between them, conformational principles, types of repeating (secondary) structures and so on. The main section on each class is deliberately selective, because of the large amount of structural information now available. The section on polynucleotides concentrates on DNA, reviewing the classical double-helical models and the evidence provided by X-ray fibre diffraction, but also paying special attention to the rapid growth of new information on such features as the variations in helix geometry and in base-stacking, those data being derived primarily from studies of small self-complementary oligonucleotides. Alternative models and the question of right-handed versus left-handed structures are also considered. Among polypeptide structures, both globular and fibrous proteins are described. Globular proteins are treated as a group, with no detailed description of any one of them; this section concentrates on the organisation of globular proteins via folding units and domains, some general features (protein homology, catalysis, flexibility, interaction with water), membrane proteins, immunoglobulins and viruses.
NoSOCS in SDSS - IV. The role of environment beyond the extent of galaxy clusters

We are able to extend the investigation of the color-morphology-density-radius relations, for bright and faint galaxies, to $R \gtrsim 3 \times R_{200}$ and to very low density regions, probing the transition region between cluster and field galaxies, and finding a smooth variation between these two populations. We investigate the environmental variation of galaxy properties (and their relations), such as color, spectral type and concentration. Our sample comprises 6,415 galaxies that were previously selected as cluster members from 152 systems with $z \le 0.100$. Our main findings are: (i) The fraction of discs is generally higher than the ones for blue and star-forming galaxies, indicating a faster transformation of color and star-formation compared to structural parameters. (ii) Regarding the distance to the cluster center we find a small variation in the galaxy populations outside the virial radius. Once within that radius the fractions of each population change fast, decreasing even faster within $R \sim 0.3 \times R_{200}$. (iii) We also find a small increase in the fraction of blue faint galaxies within $R \sim 0.4 \times R_{200}$, before decreasing again to the most central bin. (iv) Our results do not indicate a significant dependence on cluster mass, except for the disc fraction in the core of clusters. (v) The relations between galaxy properties also point to no dependence on cluster mass, except for the scatter of the color stellar mass relation. Our results corroborate a scenario on which pre-processing in groups leads to a strong evolution in galaxy properties, before they are accreted by large clusters (abridged).
Graph Recurrent Neural Network for Text Classification

Graph Neural Networks(GNNs) application to 001 text classification is currently one of the most 002 popular fields. Most GNNs-based models only 003 focus on the interaction of words in the docu-004 ment, whereas the word order is ignored, and 005 the related semantic information is lost. In ad-006 dition, when the graph density increases, the 007 word nodes become over-smooth. As a result, 008 the semantic information of the document is de-009 stroyed. In this paper, TextGRNN, a text classi-010 fication method based on GNN is proposed to 011 solve the above problems. First, our proposed 012 model constructs the document-level graph via 013 Visibility Graph, in which the graph density 014 is restrained, and updates the word represen-015 tations by GNN. Then the TextGRNN model 016 utilizes Bi-LSTM that can recognize word or-017 der to learn the semantic information of the 018 document. Finally, the attention mechanism is 019 used to highlight the essential words. Numer-020 ous experiments on three benchmark datasets 021 demonstrate that our model is preferable to 022 state-of-the-art text classification methods. 023
Multiferroic Tunnel Junctions

Multiferroics are singular materials that can display simultaneously electric and magnetic orders. Some of them can be ferroelectric and ferromagnetic and, for example, provide the unique opportunity of encoding information independently in electric polarization and magnetization to obtain four different logic states. However, schemes allowing a simple electrical readout of these different states have not been demonstrated so far. In this article, we show that this can be achieved if a multiferroic material is used as the tunnel barrier in a magnetic tunnel junction. We demonstrate that thin films of ferromagnetic-ferroelectric La0.1Bi0. 9MnO3 (LBMO) retain both ferroic properties down to a thickness of only 2 nm. We have used such films as spin-filtering tunnel barriers the magnetization and electric polarization of which can be switched independently. In that case, the tunnel current across the structure is controlled by both the magnetic and ferroelectric configuration of the barrier, which gives rise to four distinct resistance states. This can be explained by the combination of spin filtering by the ferromagnetic LBMO barrier and the partial charge screening of electrical charges at the barrier/electrode interfaces due to ferroelectricity. We anticipate our results to be a starting point for more studies on the interplay between ferroelectricity and spin-dependent tunneling, and for the use of nanometric multiferroic elements in prototype devices. On a wider perspective, they may open the way towards novel reconfigurable logic spintronics architectures and to electrically controlled readout in quantum computing schemes using the spin-filter effect.
BACN: Bi-direction Attention Capsule-based Network for Multimodal Sentiment Analysis

Capsule-based network has currently identi-001 ﬁed its effectiveness in analyzing the hetero-002 geneity issue of multimodal sentiment analy-003 sis. However, existing manners could only 004 exploit the spatial relation between represen-005 tation and output layer via down-top atten-006 tion, which fails to effectively explore both 007 inter-modality and intra-modality context. In 008 this paper, during the preprocess period, we 009 ﬁrst present the multimodal dynamic enhanced 010 module to facilitate the intra-modality con-011 text, which signiﬁcantly boost the learning efﬁ-012 ciency in dealing with multimodal heterogene-013 ity issue. Furthermore, the bi-direction atten-014 tion capsule-based network (BACN) is pro-015 posed to capture dynamic inter-modality con-016 text via the novel bi-direction dynamic routing 017 mechanism. Speciﬁcally, BACN ﬁrstly high-018 lights the static and low-level inter-modality 019 context based on top-down attention. Then, 020 the static multimodal context is transmitted to 021 dynamic routing procedure, naturally allowing 022 us to investigate dynamic and high-level inter-023 modality context. This indeed unleash the ex-024 pressive power and provides the superior ca-025 pability to bridge the modality gap among all 026 the modalities. The experiments demonstrate 027 that BACN can achieve state-of-the-art perfor-028 mance. 029
THE EFFECT OF SOCIAL INFLUENCE AND PRODUCT ATTRIBUTES ON CUSTOMER PURCHASE INTENTION: A STUDY OF SECOND-HAND MANADO

: The purpose of this research is to analyze the effect of social influence and product attributes on customer purchase intention of second-hand clothes in Manado. The method used in this research is the quantitative method. This research used is purposive sampling method, and 105 samples were collected by using a questionnaire with a 5 Likert scale that was distributed via social media. The data collected are processed and analyzed using the multiple linear regression method. The result of this research shows that social influence (X 1 ) and product attributes (X 2 ) have a positive and significant effect towards purchase intention (Y) both partially and simultaneously.
Qigong for mental health and sleep quality in postmenopausal women: A randomized controlled trial

Background: Menopause is one of the stages in a woman’s life that affects her psychological health, the most frequent being anxiety and depression. In addition, another problem related to this stage is the lack of sleep that causes a decrease in the quality of sleep. The purpose of this randomized controlled trial was to analyze the effectiveness of a Qigong exercise program on sleep quality, anxiety, and depression in Spanish postmenopausal women. Methods: A total of 125 women were randomly assigned to an experimental group (EG) (n = 63) that carried out a Qigong exercise program for 12 weeks, or a control group (CG) (n = 62), which did not perform any type of intervention. Sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI) and anxiety and depression using the Hospital Anxiety and Depression Scale (HADS). Results: Women who underwent an intervention program experienced significant improvements for all measured variables, except for the use of sleeping medication and daytime dysfunctions that did not show any significant effect with respect to the group and group × time interaction. Conclusions: After an intervention based on a BaDuanJin Qigong exercise program for 12 weeks, improvements were observed in sleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbances, the total score of the PSQI, anxiety and depression in postmenopausal Spanish women.
Curcuminoids can prevent post-contrast acute kidney injury in chronic kidney disease patients: A randomized controlled trial

Background: Post contrast acute kidney injury (PC-AKI) following coronary procedures is a common cause of renal impairment in hospitalized patients, curcuminoids exert anti-inflammatory and antioxidant actions and have shown positive effects on renal hemodynamic protection The objective of this study was to evaluate the role of curcuminoids in the prevention of PC-AKI in chronic kidney disease (CKD) patients. Methods: This study was a single-center, prospective, double-blind, randomized, placebo-controlled trial in patients with CKD undergoing elective coronary angiography (CAG) at Vajira Hospital from October 2018 to March 2019. Patients were randomized to receive curcuminoids at 1500 mg per day 3 days before and 2 days after the procedure or placebo. The primary outcome was the development of PC-AKI, and the secondary outcomes were overall acute kidney injury (AKI) incidence within 7 days after CAG, changes in estimated glomerular filtration rate (eGFR), interleukin-6 (IL-6), high sensitivity C-reactive protein (hs-CRP), and other adverse events. Results: Sixty patients were enrolled in this study (30 in the curcuminoid group and 30 in the control group). AKI developed in 5 patients in the control group but not in the curcuminoid group (16.67% vs 0%, P = .052). that curcuminoids could preserve changes in eGFR compared to the placebo group (-1.5 vs 2.5 mL/min/1.73 m2, P value <.001 within 48 hours and -4 vs 1 mL/min/1.73 m2, P value 0.002 within 7 days). However, the hs-CRP and IL-6 levels did not differ between the groups. No serious adverse events were observed in either of the groups. Conclusion: Prophylactic administration of curcuminoids, in addition to standard treatment, reduces the incidence of PC-AKI in patients with CKD undergoing elective CAG.
Effectiveness of a physical activity intervention on the overweight and obesity of Chilean schoolchildren

Introduction: Physical fitness is considered a measure that integrates most of the functions of the human organism that are involved in physical activity. Motor competence is important due to its observed implications in the physical, mental and social development of children and adolescents. These assessments require the existence of updated reference values that allow the categorization of individuals and groups according to levels of physical fitness and motor competence. This paper describes the study protocol to Effectiveness of a Physical Activity Intervention on the Overweight and Obesity of Chilean Schoolchildren, and in this way determine, through the calculation of a representative sample, reference values for physical fitness and motor competence in children aged 4 to 6 years in the region of La Araucanía, Chile. Methods: children in pre-basic education in transition grades I and II (4 and 5 years old), and those in the first year of basic education (6 years old) will be invited to participate. The sample will be probabilistic. The measures of a randomized controlled trial (registered in ClinicalTrial.gov NCT04194580) will be used. Conclusion: the lack of reference values for physical condition and motor competence for children between 6 and 4 years of age in the Araucanía region highlights the need to establish values, which will contribute to improving the health of children of the age group to be worked on.
Gravitational collapse and black hole formation in a braneworld

In this thesis we present the first numerical study of gravitational collapse in braneworlds within the framework of the single brane model proposed by Randall and Sundrum (RSII). We directly show that the evolutions of sufficiently strong initial data configurations result in black holes (BHs) with finite extension into the bulk. The extension changes from sphere to pancake (or cigar, seen from a different perspective) as the size of BH increases. We find preliminary evidences that BHs of the same size generated from distinct initial data profiles are geometrically indistinguishable. As such, a no-hair theorem of BH (uniqueness of BH) is suggested to hold in the RSII spacetimes studied in this thesis---these spacetimes are axisymmetric without angular momentum and non-gravitational charges. In particular, the BHs we obtained as the results of the dynamical system, are consistent with the ones previously obtained from a static vacuum system by Figueras and Wiseman. We also obtained some results in closed form without numerical computation such as the equality of ADM mass of the brane with the total mass of the braneworld. The calculation within the braneworld requires advances in the formalism of numerical relativity (NR). The regularity problem in previous numerical calculations in axisymmetric (and spherically symmetric) spacetimes, is actually associated with neither coordinate systems nor the machine precision. The fundamental variables (the unknown functions to be solved for in numerical calculations) are more important to make the numerical calculations in cylindrical coordinates regular. The generalized harmonic (GH) formalism and the BSSN formalism for general relativity are developed to make them suitable for calculations in non-Cartesian coordinates under non-flat background. A conformal function of the metric is included into the GH formalism to simulate the braneworld.
Women's Prodromal Myocardial Infarction Symptom Perception, Attribution, and Care Seeking

Background Most women experience prodromal myocardial infarction (MI) symptoms, but more information is needed about the perception, attribution, and care-seeking behaviors related to these prodromal symptoms. Objectives We aimed to describe women's perceptions, attributions, and care-seeking behaviors related to prodromal MI symptoms. Method We used a qualitative, multiple case study approach, recruiting participants during summer 2019 from a large hospital in the Midwestern United States. Data were collected from interviews with the women who experienced MI and some of their family members, journals, and electronic health records. An inductive, comparative analysis procedure was applied. Results Ten women, ages 42 to 84, participated in the study. The women experienced a mixture of certainty and uncertainty related to their symptoms and engaged in several cognitive processes to conceptualize and act upon their symptoms. Although all the women retrospectively reported at least 4 prodromal symptoms, they lacked knowledge of prodromal MI symptoms and often responded to prodromal sensations that they experienced using emotion- and avoidance-based strategies. It was difficult for the women to establish a symptom pattern that was attributable to heart disease. Discussion The findings of this study may be used as evidence to support interventions that would facilitate women's care seeking for and health care providers' recognition of prodromal MI symptoms. Additional research is necessary to more fully characterize the cognitive processes at play for women of many different sociocultural backgrounds who experience prodromal MI symptoms.