cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Yield Optimization using Hybrid Gaussian Process Regression and a Genetic Multi-Objective Approach
Creators: name: Fuhrländer, Mona
name: Schöps, Sebastian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences
subject: G.1.8; G.3; I.6.3; J.2
subject: 60G15, 60H35, 78M31, 78M50

description: Quantification and minimization of uncertainty is an important task in the design of electromagnetic devices, which comes with high computational effort. We propose a hybrid approach combining the reliability and accuracy of a Monte Carlo analysis with the efficiency of a surrogate model based on Gaussian Process Regression. We present two optimization approaches. An adaptive Newton-MC to reduce the impact of uncertainty and a genetic multi-objective approach to optimize performance and robustness at the same time. For a dielectrical waveguide, used as a benchmark problem, the proposed methods outperform classic approaches.
Additional file 1: of Shared facial emotion processing functional network findings in medication-naĂŻve major depressive disorder and healthy individuals: detection by sICA
Creators: name: Li, Jian
name: Kale Edmiston, E.
name: Tang, Yanqing
name: Fan, Guoguang
name: Xu, Ke
name: Wang, Fei
name: Xu, Jiansong
Publisher: name: figshare
Year: 2018
Subjects: subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: Figure S1. ICASSO results. (PDF 125 kb)
Chance-Constrained Set Covering with Wasserstein Ambiguity
Creators: name: Shen, Haoming
name: Jiang, Ruiwei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We study a generalized distributionally robust chance-constrained set covering problem (DRC) with a Wasserstein ambiguity set, where both decisions and uncertainty are binary-valued. We establish the NP-hardness of DRC and recast it as a two-stage stochastic program, which facilitates decomposition algorithms. Furthermore, we derive two families of valid inequalities. The first family targets the hypograph of a "shifted" submodular function, which is associated with each scenario of the two-stage reformulation. We show that the valid inequalities give a complete description of the convex hull of the hypograph. The second family mixes inequalities across multiple scenarios and gains further strength via lifting. Our numerical experiments demonstrate the reliability of the DRC model and the effectiveness of our proposed reformulation and valid inequalities.
description: Math. Program. (2022)
Genomic rearrangement screening of the BRCA1 from seventy Iranian high‑risk breast cancer families
Creators: name: Salavaty, Abbas
Publisher: name: figshare
Year: 2017
Subjects: subject: Cancer
subject: 111203 Cancer Genetics
subject: FOS: Clinical medicine

description: Background: The second leading cause of cancer deaths in women is breast cancer. Germline mutations in susceptibility breast cancer gene BRCA1 increase the lifetime risk of breast cancer. Eighty-one large genomic rearrangements (LGRs) have been reported up to date in BRCA1 gene, and evaluation of these rearrangements helps with precise risk assessment in high-risk individuals. In this study, we have investigated LGRs in BRCA1 among Iranian high-risk breast cancer families. Materials and Methods: Seventy patients with breast cancer who were identifi ed negative for point mutations or small deletions/insertions of BRCA1 gene were selected. Deletions and duplications of BRCA1 gene were evaluated using multiplex ligation-dependent probe amplifi cation (MLPA).Results: Two deletions, deletion of exons 1A/1B-2 and exon 24, were detected in two patients with breast cancer. Th e former alteration was found in a woman with a strong family history of breast cancer while the latter one was detected in a woman with early onset of breast cancer. Conclusion: Although our data confi rm that LGRs in BRCA1 comprise a relatively small proportion of mutations in hereditary breast cancer in the Iranian population, MLPA analysis might be considered for screening of LGRs in high-risk individuals.It is worth to note that our results are consistent with previous studies in various Asian and European countries.
Additional file 2: of Shared facial emotion processing functional network findings in medication-naĂŻve major depressive disorder and healthy individuals: detection by sICA
Creators: name: Li, Jian
name: Kale Edmiston, E.
name: Tang, Yanqing
name: Fan, Guoguang
name: Xu, Ke
name: Wang, Fei
name: Xu, Jiansong
Publisher: name: figshare
Year: 2018
Subjects: subject: Cell Biology
subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: Figure S2. Matched ICs from different datasets. (PDF 2121 kb)
LINGUISTIC FEATURES OF NEGATION IN ENGLISH LANGUAGE
Creators: name: Ochilova, Nasiba
Publisher: name: Zenodo
Year: 2024

description: This article discusses the linguistic features of negations in English.  The features of teaching the pragmatic aspect of negation in English on a linguistic-cognitive basis are considered. The functional side of denial is analyzed as a negative communicative reaction, which plays an important role in the process of verbal communication.
THIAGO PALUMA.pdf
Creators: name: ANDREI ROSSI MANGO
name: THIAGO PALUMA
Publisher: name: figshare
Year: 2017
Subjects: subject: Law
subject: FOS: Law

description: This research aims to expose the historical background of the international arbitration institute since its emergence in different nations during the period of antiquity and middle age to its inclusion in the Brazilian legal system and its development in modern times. This normative historical context dates back the evolution of this institute legislation until the origin of the Law nº 9.307/96 and the Brazilian adhesion to various international protocols and treaties. In order to ascertain the use of the arbitration in disputes relating to patents, the research shows the increase of this disputes arising from economic globalization and the rapid advancement of technological expansion with the internationalization of the patent registration. Which resulted in a greater concern for the protection and resolution of disputes regarding to the intellectual property, and the creation of the WIPO Arbitration and Mediation Center. Finally, it is also exposed the basics of this institute, through an analysis of its features and principles. The methodology used in the textual development took place through the deductive method, using the bibliography in an interpretative way, and resulting in a theoretical and descriptive text.
STOPP & START criteria to detecting potentially inappropriate prescribing in hospitalized older adults: Application at European level and validation of an adaptation into French-language
Creators: name: Lang, Pierre Olivier
Publisher: name: Université de Genève
Year: 2012
Subjects: info:eu-repo/classification/ddc/616
STOPP-START criteria
Inappropriate prescribing medication
Prescribing omission
Inappropriate prescription
Omission of prescription
Older adults
Healthy ageing
Adverse drug effects
Drug-drug interaction
Drug-disease interaction

description: One of the objectives of care during the hospitalization of elderly patients, in addition to the therapeutic management of diseases, is the preservation of patients' autonomy and ability to perform activities of daily living. Once admitted to the hospital, elderly patients are at risk of functional, physical, and mental impairment, which can lead to loss of autonomy and generally results in a burden to the family, the need for professional help, entry into an institutional setting, or even death. Inappropriate prescribing of medications is one of the most important causes of morbidity and mortality within this population and therefore potentially inappropriate prescribing medication (PIM) an issue of major importance in pharmacotherapy of older patients globally. To date, Beers' criteria have been in common research usage for defining potentially inappropriate medications in older people. However, Beers' criteria have been a number of serious flaws and are of doubtful relevance to routine geriatric pharmacotherapy. For these reasons, new geriatric PIMs have been devised and validated, called screening tool for older person's prescriptions (STOPP) and screening tool to alert doctor to right treatment (START) for detection of potentially errors of prescribing commission and omission. Prospective data showed that STOPP & START criteria detected adverse drug effects (ADE) that are causal or contributory to acute hospitalisation suggesting that ADE are likely associated with PIM. With the aim to prevent PIM and ADE, STOPP & START criteria appears as: (i) a new well design evidence-based and (ii) physiological system-based tool that captures common instances of potentially inappropriate prescribing, including prescribing omission; (ii) easy and quick to use in day-to-day practice (< 2 minutes); and (iii) this with a favourable inter-rater reliability between a 18-member experts panel comprising teaching hospital consultants in geriatric medicine, clinical pharmacotherapy and old age psychiatry, senior academic primary care physicians with interest in geriatric pharmacology. Panellists were thus representing of the range of medical specialities that are regularly involved in geriatric pharmacotherapy. Using the original English version, we detailed thereafter five studies that contributed to further validate at European level and to translate into French-language this interesting, comprehensive and reliable screening tool, that enables physician to appraise an older patient's prescription drugs in the context of his/her concurrent diagnoses.
The potential role of PHF6 as an oncogene: a genotranscriptomic/proteomic meta-analysis
Creators: name: Salavaty, Abbas
Publisher: name: figshare
Year: 2017
Subjects: Cancer

description: Epigenetic complexes control various pathways within the cells. Their abnormalities can be involved in the initiation and the progression of different types of cancer. Nucleosome remodeling and deacetylase (NuRD) is an epigenetic complex that comprises several subunits such as PHF6. Although PHF6 is reported as a tumor suppressor in some of the hematopoietic malignancies, its function is still challenging in other cancers. Our study aimed at investigating the role of PHF6 in different types of cancer. We conducted a meta-analysis of PHF6 in human cancers at genomic, transcriptomic, and proteomic levels. For this purpose, we acquired the data from several databases, and tried to statistically integrate and analyze the data in order to find the potential role of PHF6 in different tumors. The results demonstrated that although PHF6 has been previously known as a tumor suppressor gene, it was remarkably overexpressed in many cancer types such as breast and colorectal cancers. Notably, PHF6 was under-expressed in a few types of cancer, including esophageal tumors. Moreover, the results indicated that although the mutation rate of PHF6 is relatively low, it is mutated in some tumor types. In addition, our data for 40 epigenetic genes showed that missense and nonsense mutations were associated with overexpression and under-expression, respectively. Our results suggest that PHF6 may function as an oncogenic factor in several types of cancer. We also hypothesize that PHF6 may also play its role in a tissue-specific manner. Our findings suggest further investigations regarding the exact role of PHF6 in tumor types.
The absence of the Efimov effect in systems of one- and two-dimensional particles
Creators: name: Barth, Simon
name: Bitter, Andreas
name: Vugalter, Semjon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81Q10, 47A75, 47N50

description: We study virtual levels of $N$-particle Schrödinger operators and prove that if the particles are one-dimensional and $N\ge 3$, then virtual levels at the bottom of the essential spectrum correspond to eigenvalues. The same is true for two-dimensional particles if $N\ge 4$. These results are applied to prove the non-existence of the Efimov effect in systems of $N\ge 4$ one-dimensional or $N\ge 5$ two-dimensional particles.
description: 51 pages
A non-Abelian parton state for the $ν=2+3/8$ fractional quantum Hall effect
Creators: name: Balram, Ajit C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Fascinating structures have arisen from the study of the fractional quantum Hall effect (FQHE) at the even denominator fraction of $5/2$. We consider the FQHE at another even denominator fraction, namely $ν=2+3/8$, where a well-developed and quantized Hall plateau has been observed in experiments. We examine the non-Abelian state described by the "$\bar{3}\bar{2}^{2}1^{4}$" parton wave function and numerically demonstrate it to be a feasible candidate for the ground state at $ν=2+3/8$. We make predictions for experimentally measurable properties of the $\bar{3}\bar{2}^{2}1^{4}$ state that can reveal its underlying topological structure.
description: 23 pages, 9 figures, corrected N=10 overlaps for 2/7
Validación en castellano de la Woman Abuse Screening Tool (WAST) en población de mujeres con problemas de salud mental.
Creators: name: Vila-Badia, Regina
name: Cobo, Jesús
name: Miquel, Laia
name: Folch, Daniel
name: Mora, Laura
name: Blithikioti, Chrysanthi
name: Arranz, Sara
name: Butjosa, Anna
name: Serra, Clara
name: Goldberg, Ximena
name: Usall, Judith
name: Ochoa, Susana
name: Cirici, Roser
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2024

description: Psicosomàtica y Psiquiatría, Núm. 28 (2024): enero-febrero-marzo
Variational Properties Of The Second Eigenvalue Of The Conformal Laplacian
Creators: name: Gursky, Matthew J.
name: Pérez-Ayala, Samuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Let $(M^n,g)$ be a closed Riemannian manifold of dimension $n\ge 3$. Assume $[g]$ is a conformal class for which the Conformal Laplacian $L_g$ has at least two negative eigenvalues. We show the existence of a (generalized) metric that maximizes the second eigenvalue of $L_g$ over all conformal metrics (the first eigenvalue is maximized by the Yamabe metric). We also show that a maximal metric defines either a nodal solution of the Yamabe equation, or a harmonic map to a sphere. Moreover, we construct examples of each possibility.
Tissue Specific Expression Levels of Apoptosis Involved Genes Have Correlations with Codon and Amino Acid Usage
Creators: name: Salavaty, Abbas
Publisher: name: figshare
Year: 2017
Subjects: subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences

description: Different mechanisms, including transcriptional and post transcriptional processes, regulate tissue specific expression of genes. In this study, we report differences in gene/protein compositional features between apoptosis involved genes selectively expressed in human tissues. We found some correlations between codon/amino acid usage and tissue specific expression level of genes. The findings can be significant for understanding the translational selection on these features. The selection may play an important role in the differentiation of human tissues and can be considered for future studies in diagnosis of some diseases such as cancer.
Additional file 1: of Metformin restores electrophysiology of small conductance calcium-activated potassium channels in the atrium of GK diabetic rats
Creators: name: Fu, Xi
name: Pan, Yilong
name: Cao, Qian
name: Li, Bin
name: Wang, Shuo
name: Du, Hongjiao
name: Duan, Na
name: Li, Xiaodong
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Table S1. Raw data of blood glucose level. Table S2. Raw data of fibrotic area. Table S3. Raw data of western blotting detection of the expressions of KCa2.1, KCa2.2 and KCa2.3. Table S4. Raw data of real-time PCR detection of the expressions of KCNN1, KCNN2, and KCNN3. Table S5. Raw data of SK current intensities at − 140 mV. Table S6. Raw data of current-voltage relation of SK currents at voltages ranging from − 150 to − 20 mV. Table S7. Raw data of action potential parameters. Table S8. Raw data of action potential increase before and after exposure to apamin. (DOC 178 kb)
Sanguine: Visual Analysis for Patient Blood Management
Creators: name: Lin, Haihan
name: Metcalf, Ryan A.
name: Wilburn, Jack
name: Lex, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Blood transfusion is a frequently performed medical procedure in surgical and nonsurgical contexts. Although it is frequently necessary or even life-saving, it has been identified as one of the most overused procedures in hospitals. Unnecessary transfusions not only waste resources but can also be detrimental to patient outcomes. Patient blood management (PBM) is the clinical practice of optimizing transfusions and associated outcomes. In this paper, we introduce Sanguine, a visual analysis tool for transfusion data and related patient medical records. Sanguine was designed with two user groups in mind: PBM experts and clinicians who conduct transfusions. PBM experts use Sanguine to explore and analyze transfusion practices and its associated medical outcomes. They can compare individual surgeons, or compare outcomes or time periods, such as before and after an intervention regarding transfusion practices. PBM experts then curate and annotate views for communication with clinicians, with the goal of improving their transfusion practices. Such a review session could be in person or through a shared link. We validate the utility and effectiveness of Sanguine through case studies.
Identifying Stress Responsive Genes using Overlapping Communities in Co-expression Networks
Creators: name: Riccio, Camila
name: Finke, Jorge
name: Rocha, Camilo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: This paper proposes a workflow to identify genes that respond to specific treatments in plants. The workflow takes as input the RNA sequencing read counts and phenotypical data of different genotypes, measured under control and treatment conditions. It outputs a reduced group of genes marked as relevant for treatment response. Technically, the proposed approach is both a generalization and an extension of WGCNA. It aims to identify specific modules of overlapping communities underlying the co-expression network of genes. Module detection is achieved by using Hierarchical Link Clustering. The overlapping nature of the systems' regulatory domains that generate co-expression can be identified by such modules. LASSO regression is employed to analyze phenotypic responses of modules to treatment. Results. The workflow is applied to rice (Oryza sativa), a major food source known to be highly sensitive to salt stress. The workflow identifies 19 rice genes that seem relevant in the response to salt stress. They are distributed across 6 modules: 3 modules, each grouping together 3 genes, are associated to shoot K content; 2 modules of 3 genes are associated to shoot biomass; and 1 module of 4 genes is associated to root biomass. These genes represent target genes for the improvement of salinity tolerance in rice. Conclusion. A more effective framework to reduce the search-space for target genes that respond to a specific treatment is introduced. It facilitates experimental validation by restraining efforts to a smaller subset of genes of high potential relevance.
Extremal Eigenvalues Of The Conformal Laplacian Under Sire-Xu Normalization
Creators: name: Pérez-Ayala, Samuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Let $(M^n,g)$ be a closed Riemannian manifold of dimension $n\ge 3$. We study the variational properties of the $k$-th eigenvalue functional $\tilde g\in[g] \mapsto λ_k(L_{\tilde g})$ under a non-volume normalization proposed by Sire-Xu. We discuss necessary conditions for the existence of extremal eigenvalues under such normalization. Also, we discuss the general existence problem when $k=1$.
Additional file 3: of Shared facial emotion processing functional network findings in medication-naĂŻve major depressive disorder and healthy individuals: detection by sICA
Creators: name: Li, Jian
name: Kale Edmiston, E.
name: Tang, Yanqing
name: Fan, Guoguang
name: Xu, Ke
name: Wang, Fei
name: Xu, Jiansong
Publisher: name: figshare
Year: 2018
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Evolutionary Biology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: Table S1. Brain regions showing task-related changes in BOLD signal assessed by SPM8. (PDF 106 kb)
Small-Gain Theorem for Safety Verification of Interconnected Systems
Creators: name: Lyu, Ziliang
name: Xu, Xiangru
name: Hong, Yiguang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: A small-gain theorem in the formulation of barrier function is developed in this work for safety verification of interconnected systems. This result is helpful to verify input-to-state safety (ISSf) of the overall system from the safety information encoded in the subsystem's ISSf-barrier function. Also, it can be used to obtain a safety set in a higher dimensional space from the safety sets in two lower dimensional spaces.
Additional file 1: of Managing diabetic foot infections: a survey of Australasian infectious diseases clinicians
Creators: name: Commons, Robert
name: Raby, Edward
name: Athan, Eugene
name: Bhally, Hasan
name: Chen, Sharon
name: Guy, Stephen
name: Ingram, Paul
name: Lai, Katy
name: Lemoh, Chris
name: Lim, Lyn-Li
name: Manning, Laurens
name: Miyakis, Spiros
name: OâReilly, Mary
name: Roberts, Adam
name: Sehu, Marjoree
name: Torda, Adrienne
name: Vicaretti, Mauro
name: Lazzarini, Peter
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Questionnaire. (DOCX 34Â kb)
Impact of danger signaling in the skin
Creators: name: Gaide, Olivier
Publisher: name: Université de Genève
Year: 2012
Subjects: info:eu-repo/classification/ddc/616.07
Adaptive immunity
Innate immunity
Inflammasome
Interleukin
TSLP
Skin

description: Danger sensors are molecular complexes allowing our tissues to be alerted to the presence of cellular damage of various origins. These sensors share a similar structure and activation mechanism relying on the formation of circular platforms, called signalosome. One such molecular complex was called the inflammasome, as it controls the activation of two pro- inflammatory cytokines, Interleukin (IL-)1β and IL-18. Triggers of the inflammasome range from genetic mutations to microbial products, gout crystals, ultraviolet light, nanoparticles and adjuvant chemicals. As a result of this surprising diversity, the inflammasome is the object of much attention in many medical fields, including dermatology. Indeed, the skin is an area of intense exposure to the outside realm of microbes, but also of chemical and physical harm. It not only serves as a barrier protecting inner organs but also plays a key role in recruiting and directing immune responses. This works gives an overview on the molecular and cellular mechanisms regulating danger sensing in the skin, with a focus on the inflammasome, and provides an in-depth look on the research and clinical developments related to this emerging field.
Preventing Infections and Controlling Multiresistant Pathogens in Orthopaedic and Trauma Surgery
Creators: name: Uckay, Ilker
Publisher: name: Université de Genève
Year: 2012
Subjects: info:eu-repo/classification/ddc/616
Ortopaedic surgery
Infections
Prevention
Antibiotic stewarship

description: Orthopaedic surgery has low HAI incidences compared to other surgical disciplines. However, when they do occur, these infections are associated with substantial morbidity, prolonged hospital stay, exorbitant costs, and difficulties in eradication with life-long recurrence risks of around 10-20%, especially in the case of multi-resistant pathogens. Prevention remains of the utmost importance and harbours some hallmarks not shared with other surgical disciplines: low inoculum for implant infections; pathogenicity of coagulase-negative staphylococci and other skin commensals; possible haematogenous origin; and long post-discharge surveillance periods. An adequate screening and decolonization policy regarding multi-resistant pathogens, cautious antimicrobial use, and iterative epidemiologic interventions remain essential when dealing with multi-morbid patients hospitalised in specialised septic orthopaedic wards under the constant influence of high-dose and long-lasting antibiotic therapies. Among the many measures to prevent orthopaedic SSI, only some are based on strong evidence, and there is insufficient evidence to show which element is superior over any other. This highlights the need for multimodal approaches involving active post-discharge surveillance, as well as measures at every step of the care process. These range from pre-operative care to surgery and post-operative care, at the individual patient level to department-wide interventions targeting all HAI, including antibiotic stewardship. Although theoretically reducible to zero, the maximal realistic extent to decrease SSI in elective orthopaedic surgery remains unknown.
Additional file 4: of Shared facial emotion processing functional network findings in medication-naĂŻve major depressive disorder and healthy individuals: detection by sICA
Creators: name: Li, Jian
name: Kale Edmiston, E.
name: Tang, Yanqing
name: Fan, Guoguang
name: Xu, Ke
name: Wang, Fei
name: Xu, Jiansong
Publisher: name: figshare
Year: 2018
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: Table S2. Betaweights at each task condition and related p values. (PDF 99 kb)
The Study of Differentially Expressed MicroRNAs in Breast Cancer Cells Through Interaction with Endothelial Cells
Creators: name: Aldous, Eman Khaleel
Publisher: name: Manara - Qatar Research Repository
Year: 2025
Subjects: classificationCode: 40
subject: Engineering

description: Breast cancer is the most common cancer worldwide and the main cause of death among women. This disease is highly complex and heterogeneous which affects the diagnosis and treatment of the disease. The interaction between breast cancer cells and their tumor microenvironment is very essential for breast cancer development. There are many types of cells that constitute the tumor microenvironment such as fibroblasts, endothelial cells, pericytes, immune cells and extracellular matrix. Out of these cells, the most crucial cell type to the survival of breast cancer cells and is involved in angiogenesis is the endothelial cells. MicroRNAs(miRNAs) are small non-coding RNAs that play a crucial role in many biological processes such as cell proliferation, differentiation and apoptosis by regulating gene expression. Recent studies have demonstrated that interaction between Breast cancer and Endothelial cells changes the gene expression. Consequently, we hypothesized that the interaction between breast cancer and endothelial cells can modulate the expression of miRNAs in breast cancer cells which in turn modulate the biology of breast cancer. By co-culturing breast cancer cell line MDA-MB231 with endothelial cells and analyzing the differentially expressed miRNAs in both cell types, we observed that miR-146a was exclusively downregulated in co-cultured breast cancer cells which was identified previously to be a tumor suppressor. We detected miR-589 was upregulated in co-cultured breast cancer cells and downregulated in ECs. MiR-18a was upregulated in both cell types, however, it was reported to be downregulated in metastatic breast cancer cells. These miRNA signatures observed in breast cancer cells indicate that interaction between epithelial and stromal compartments of breast cancer may play a role in breast cancer progression which could be a novel target for treatment.
TRAT: Tracking by Attention Using Spatio-Temporal Features
Creators: name: Saribas, Hasan
name: Cevikalp, Hakan
name: Köpüklü, Okan
name: Uzun, Bedirhan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Robust object tracking requires knowledge of tracked objects' appearance, motion and their evolution over time. Although motion provides distinctive and complementary information especially for fast moving objects, most of the recent tracking architectures primarily focus on the objects' appearance information. In this paper, we propose a two-stream deep neural network tracker that uses both spatial and temporal features. Our architecture is developed over ATOM tracker and contains two backbones: (i) 2D-CNN network to capture appearance features and (ii) 3D-CNN network to capture motion features. The features returned by the two networks are then fused with attention based Feature Aggregation Module (FAM). Since the whole architecture is unified, it can be trained end-to-end. The experimental results show that the proposed tracker TRAT (TRacking by ATtention) achieves state-of-the-art performance on most of the benchmarks and it significantly outperforms the baseline ATOM tracker.
Urban health: Access to health care for vulnerable patients in the context of migration and detention
Creators: name: Wolff, Hans
Publisher: name: Université de Genève
Year: 2012
Subjects: info:eu-repo/classification/ddc/613
Urban health
Access to health care
Vulnerable populations
Social epidemiology
Clinical research
Social determinants of health
Social inequality
Undocumented migrants
Prison
Detention

description: The research presented is within the context of urban health, and its objectives include: (1) To highlight the efforts made in Geneva in improving access to health care for vulnerable and disadvantaged populations, such as undocumented migrants and detainees; (2) To describe the sociodemographic and epidemiologic profile concerning the main morbidities of these populations; and (3) To outline future developments related to the research, generally concerning access to health care for these vulnerable populations in urban centers. Urban health includes two main aspects. One is the description of the health status of urban populations, and two, an understanding of urban health determinants with the aim to implement those interventions that promote good health. Since 2007 the majority of individuals live in cities, which has a major influence on all spheres of life, especially health. In Europe, the rural/urban transition occurred prior to 1950.1 Urban areas have higher proportions of migrants and other vulnerable populations and concentrate social inequalities. Access to health care for all residents is a fundamental human right. Its realization for vulnerable populations helps to increase social justice thereby serving not only the vulnerable but the entire community. Switzerland's cities have a substantial number of undocumented migrants, i.e., migrants without a legal residency permit. In the beginning of the 1990's they had no structured access to health care. In 1996 the creation of the “Unité Mobile de Soins Communautaires (UMSCO)”, a mobile health care unit attached to the Division of Primary Care of the Geneva University Hospitals (HUG), markedly improved access to health care for undocumented migrants in Geneva. Additionally, this unit improved our epidemiologic knowledge concerning this hard-to-reach and easy-to-miss population. Compared to the urban population with a residency permit, this undocumented population was found to have high rates of unintended pregnancy (odds ratio (OR) 8.0), delayed prenatal care (>12 weeks of amenorrhea) (OR 10.8), increased episodes of violence during pregnancy (OR 8.6), and elevated prevalence of chlamydia (5.8%) or chagas disease (Trypanosoma cruzi prevalence 12.8%). Undocumented Latin American migrants had a greater than fivefold risk (OR 5.5) of TB-related fibrotic signs on chest X-ray. From the perspective of infectious disease control it is particularly important for the urban community to have structures which are in contact with hard-to-reach populations.
Discordant sets and ergodic Ramsey theory
Creators: name: Bergelson, Vitaly
name: Huryn, Jake
name: Raghavan, Rushil
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 05D10, 37A44

description: We explore the properties of non-piecewise syndetic sets with positive upper density, which we call "discordant", in countably infinite amenable (semi)groups. Sets of this kind are involved in many questions of Ramsey theory and manifest the difference in complexity between the classical van der Waerden's theorem and Szemerédi's theorem. We generalize and unify old constructions and obtain new results about these historically interesting sets. Along the way, we draw from various corners of mathematics, including classical Ramsey theory, ergodic theory, number theory, and topological and symbolic dynamics.
description: 36 pages
title: ÐÑÐµÐ½ÐºÐ° ÐºÐ°ÑÐµÑÑÐ²Ð° ÑÐ¸ÑÑÐµÐ¼Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°
title: Ð¼Ð¾Ð½Ð¾Ð³ÑÐ°ÑÐ¸Ñ
titleType: Subtitle
Creators: name: ÐÐ½Ð´ÑÐµÐµÐ², ÐÐ½Ð´ÑÐµÐ¹
name: ÐÑÐ·Ð¾Ð², ÐÐ½ÑÐ¾Ð½
name: ÐÐ»ÑÑÐ¾Ð², ÐÐ»Ð°Ð´Ð¸Ð¼Ð¸Ñ
name: ÐÑÑÐµÐ¼Ð¾Ð², Ð¡ÐµÑÐ³ÐµÐ¹
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2023
Subjects: ÐÑ ÑÐ°Ð½Ð° ÑÑÑÐ´Ð°

description: Ð¦ÐµÐ»Ñ Ð¼Ð¾Ð½Ð¾Ð³ÑÐ°ÑÐ¸Ð¸ â Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÑ, ÐºÐ°Ðº Ð¿ÑÐ¾Ð¸ÑÑÐ¾Ð´Ð¸Ñ Ð¿ÐµÑÐµÑÐ¾Ð´ Ð¾Ñ ÑÑÐ°ÑÐ¾Ð¹ ÐºÐ¾Ð½ÑÐµÐ¿ÑÐ¸Ð¸ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°, Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð½Ð¾Ð¹ Ð½Ð° ÑÐµÐ°Ð³Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ Ð½Ð° Ð¸Ð½ÑÐ¸Ð´ÐµÐ½Ñ, Ðº Ð½Ð¾Ð²Ð¾Ð¹ ÐºÐ¾Ð½ÑÐµÐ¿ÑÐ¸Ð¸ â ÑÐµÐ°Ð³Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð½Ð° ÑÐ¸ÑÐº. ÐÐ°Ðº ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°ÑÑ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÐ¸ ÑÐ¸ÑÑÐµÐ¼Ð½Ð¾Ð³Ð¾ Ð¿Ð¾Ð´ÑÐ¾Ð´Ð° Ð´Ð»Ñ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°, ÑÑÐ¾ ÑÐ°ÐºÐ¾Ðµ ÐºÐ°ÑÐµÑÑÐ²Ð¾ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸? ÐÐ°Ðº ÐºÐ°ÑÐµÑÑÐ²Ð¾ Ð¶Ð¸Ð·Ð½Ð¸ Ð²Ð»Ð¸ÑÐµÑ Ð½Ð° ÐºÐ°ÑÐµÑÑÐ²Ð¾ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°, Ð¸ ÐºÐ°Ðº Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÑ ÑÑÑÐ´Ð° Ð²Ð»Ð¸ÑÐµÑ Ð½Ð° ÐºÐ°ÑÐµÑÑÐ²Ð¾ Ð¶Ð¸Ð·Ð½Ð¸? ÐÐ°ÐºÐ¾Ð²Ñ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð°ÑÐ¿ÐµÐºÑÑ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°? ÐÐ°Ðº Ð¾ÑÑÑÐµÑÑÐ²Ð»ÑÐµÑÑÑ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ°Ñ Ð¾ÑÐµÐ½ÐºÐ° ÐºÐ°ÑÐµÑÑÐ²Ð° Ð¶Ð¸Ð·Ð½Ð¸ Ð¸ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°? Ð Ð¼Ð¾Ð½Ð¾Ð³ÑÐ°ÑÐ¸Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð¾ÐºÑÑÐ¶Ð°ÑÑÐµÐ¹ ÑÑÐµÐ´Ñ Ð½Ð° Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÑ ÑÑÐ»Ð¾Ð²Ð¸Ð¹ ÑÑÑÐ´Ð°, Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ñ Ð¼ÐµÐ´Ð¸ÑÐ¸Ð½ÑÐºÐ¸Ðµ Ð°ÑÐ¿ÐµÐºÑÑ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°, Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ ÑÐµÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¸ÑÑÐµÐ¼Ñ Ð·Ð´ÑÐ°Ð²Ð¾Ð¾ÑÑÐ°Ð½ÐµÐ½Ð¸Ñ Ð½Ð° ÐºÐ°ÑÐµÑÑÐ²Ð¾ Ð¶Ð¸Ð·Ð½Ð¸ Ð¸ ÑÑÑÐ´Ð°. ÐÑÐ±ÑÐ°Ð½Ñ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð¼ÐµÐ´Ð¸ÑÐ¸Ð½ÑÐºÐ¾Ð³Ð¾ Ð¾Ð±ÑÐ»ÑÐ¶Ð¸Ð²Ð°Ð½Ð¸Ñ. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð° ÑÐ²Ð¾Ð»ÑÑÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¾ÑÑÐ°Ð½Ñ ÑÑÑÐ´Ð° Ð¾Ñ Â«ÐÐ¾ÐºÐ»Ð°Ð´Ð° Ð Ð¾Ð±ÐµÐ½ÑÐ°Â» Ð´Ð¾ ÐÐ¡Ð 45000. ÐÐ¾ÐºÐ°Ð·Ð°Ð½Ñ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ ÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÐºÐ¾Ð½ÑÑÑÐ° Ð¸ ÑÐ¸ÐºÐ»Ð° ÑÑÐ¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¿ÑÐ¾ÑÐµÑÑÐ½Ð¾-Ð¿ÑÐ¾ÑÐµÐ´ÑÑÐ½Ð¾Ð³Ð¾ Ð¿Ð¾Ð´ÑÐ¾Ð´Ð° Ð¿ÑÐ¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ ÑÐ¸ÑÑÐµÐ¼ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°. ÐÐ¾ÐºÐ°Ð·Ð°Ð½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ ÑÐµÐ³ÑÐ»ÑÑÐ¾ÑÐ½Ð¾Ð¹ Ð³Ð¸Ð»ÑÐ¾ÑÐ¸Ð½Ñ Ð½Ð° ÐºÐ°ÑÐµÑÑÐ²Ð¾ ÑÐ¸ÑÑÐµÐ¼Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°. ÐÐ¾Ð½Ð¾Ð³ÑÐ°ÑÐ¸Ñ Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð° Ð´Ð»Ñ ÑÑÐµÐ½ÑÑ Ð¸ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÐµÐ¹, ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ¾Ð² Ð¸ Ð¿ÑÐ°ÐºÑÐ¸ÐºÐ¾Ð², Ð´Ð¾ÐºÑÐ¾ÑÐ°Ð½ÑÐ¾Ð², Ð°ÑÐ¿Ð¸ÑÐ°Ð½ÑÐ¾Ð² Ð¸ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð², Ð¸Ð·ÑÑÐ°ÑÑÐ¸Ñ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ÑÑÑÐ´Ð°.
Modes of Information Flow in Collective Cohesion
Creators: name: Sattari, Sulimon
name: Basak, Udoy S.
name: James, Ryan G.
name: Crutchfield, James P.
name: Komatsuzaki, Tamiki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Pairwise interactions between individuals are taken as fundamental drivers of collective behavior responsible for group cohesion and decision-making. While an individual directly influences only a few neighbors, over time indirect influences penetrate a much larger group. The abiding question is how this spread of influence comes to affect the collective. One or a few individuals are often identified as leaders, being more influential than others. Transfer entropy and time-delayed mutual information are used to identify underlying asymmetric interactions, such as leader-follower classification in aggregated individuals--cells, birds, fish, and animals. However, these conflate distinct functional modes of information flow between individuals. Computing information measures conditioning on multiple agents requires the proper sampling of a probability distribution whose dimension grows exponentially with the number of agents being conditioned on. Employing simple models of interacting self-propelled particles, we examine the pitfalls of using time-delayed mutual information and transfer entropy to quantify the strength of influence from a leader to a follower. Surprisingly, one must be wary of these pitfalls even for two interacting particles. As an alternative we decompose transfer entropy and time-delayed mutual information into intrinsic, shared, and synergistic modes of information flow. The result not only properly reveals the underlying effective interactions, but also facilitates a more detailed diagnosis of how individual interactions lead to collective behavior. This exposes the role of individual and group memory in collective behaviors. In addition, we demonstrate in a multi-agent system how knowledge of the decomposed information modes between a single pair of agents reveals the nature of many-body interactions without conditioning on additional agents.
A New Non-archimedean Metric on Persistent Homology
Creators: name: Güzel, İsmail
name: Kaygun, Atabey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 62R40, 55N31, 62H30

description: In this article, we define a new non-archimedean metric structure, called cophenetic metric, on persistent homology classes of all degrees. We then show that zeroth persistent homology together with the cophenetic metric and hierarchical clustering algorithms with a number of different metrics do deliver statistically verifiable commensurate topological information based on experimental results we obtained on different datasets. We also observe that the resulting clusters coming from cophenetic distance do shine in terms of different evaluation measures such as silhouette score and the Rand index. Moreover, since the cophenetic metric is defined for all homology degrees, one can now display the inter-relations of persistent homology classes in all degrees via rooted trees.
description: 18 pages, 6 figures
Fractal superconducting nanowires detect infrared single photons with 84% system detection efficiency, 1.02 polarization sensitivity, and 20.8 ps timing resolution
Creators: name: Meng, Yun
name: Zou, Kai
name: Hu, Nan
name: Xu, Liang
name: Lan, Xiaojian
name: Steinhauer, Stephan
name: Gyger, Samuel
name: Zwiller, Val
name: Hu, Xiaolong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The near-unity system detection efficiency (SDE) and excellent timing resolution of superconducting nanowire single-photon detectors (SNSPDs), combined with their other merits, have enabled many classical and quantum photonic applications. However, the prevalent design based on meandering nanowires makes SDE dependent on the polarization states of the incident photons; for unpolarized light, the major merit of high SDE would get compromised, which could be detrimental for photon-starved applications. Here, we create SNSPDs with an arced fractal geometry that almost completely eliminates this polarization dependence of the SDE, and we experimentally demonstrate 84$\pm$3$\%$ SDE, 1.02$^{+0.06}_{-0.02}$ polarization sensitivity at the wavelength of 1575 nm, and 20.8 ps timing jitter in a 0.1-W closed-cycle Gifford-McMahon cryocooler, at the base temperature of 2.0 K. This demonstration provides a novel, practical device structure of SNSPDs, allowing for operation in the visible, near-, and mid-infrared spectral ranges, and paves the way for polarization-insensitive single-photon detection with high SDE and high timing resolution
description: 8 pages, 4 figures
Can dark matter-dark energy interaction alleviate the Cosmic Coincidence Problem?
Creators: name: Jesus, J. F.
name: Escobal, A. A.
name: Benndorf, D.
name: Pereira, S. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we study a model of interacting dark energy - dark matter where the ratio between these components is not constant, changing from early to late times in such a way that the model can solve or alleviate the cosmic coincidence problem (CP). The interaction arises from an assumed relation of the form $ρ_x \propto ρ_d^α$, where $ρ_x$ and $ρ_d$ are the energy densities of dark energy and dark matter components, respectively, and $α$ is a free parameter. For a dark energy equation of state parameter $w=-1$ we found that, if $α=0$, the standard $Λ$CDM model is recovered, where the coincidence problem is unsolved. For $0
description: 22 pages, 6 figures, revised version, with Bayesian Information Criterion (BIC) analysis included. Version published
A hybrid adaptive Iterated Local Search with diversification control to the Capacitated Vehicle Routing Problem
Creators: name: Máximo, Vinícius R.
name: Nascimento, Mariá C. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Metaheuristics are widely employed to solve hard optimization problems, like vehicle routing problems (VRP), for which exact solution methods are impractical. In particular, local search-based metaheuristics have been successfully applied to the capacitated VRP (CVRP). The CVRP aims at defining the minimum-cost delivery routes for a given set of identical vehicles since each vehicle only travels one route and there is a single (central) depot. The best metaheuristics to the CVRP avoid getting stuck in local optima by embedding specific hill-climbing mechanisms such as diversification strategies into the solution methods. This paper introduces a hybridization of a novel adaptive version of Iterated Local Search with Path-Relinking (AILS-PR) to the CVRP. The major contribution of this paper is an automatic mechanism to control the diversity step of the metaheuristic to allow it to escape from local optima. The results of experiments with 100 benchmark CVPR instances show that AILS-PR outperformed the state-of-the-art CVRP metaheuristics.
Stability Conditions for the Horndeski Scalar Field Gravity Model
Creators: name: Gomes, Cláudio
name: Bertolami, Orfeu
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We constrain the viable models of Horndeski gravity, written in its equivalent Generalised Galileon version, by resorting to the Witten positive energy theorem. We find that the free function $G_3(ϕ, X)$ in the Lagrangian is constrained to be a function solely of the scalar field, $G_3(ϕ)$, and relations among the free functions are found. Other criterion for stability are also analysed, such as the attractiveness of gravity, the Dolgov-Kawasacki instability and the energy conditions. Some applications for Cosmology are discussed
description: 12 pages
Spin-polarized imaging of strongly interacting fermions in the ferrimagnetic state of Weyl candidate CeBi
Creators: name: Matt, Christian E.
name: Liu, Yu
name: Pirie, Harris
name: Drucker, Nathan C.
name: Jo, Na Hyun
name: Kuthanazhi, Brinda
name: Huang, Zhao
name: Lane, Christopher
name: Zhu, Jian-Xin
name: Canfield, Paul C.
name: Hoffman, Jennifer E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: CeBi has an intricate magnetic phase diagram whose fully-polarized state has recently been suggested as a Weyl semimetal, though the role of $f$ states in promoting strong interactions has remained elusive. Here we focus on the less-studied, but also time-reversal symmetry-breaking ferrimagnetic phase of CeBi, where our density functional theory (DFT) calculations predict additional Weyl nodes near the Fermi level $E_\mathrm{F}$. We use spin-polarized scanning tunneling microscopy and spectroscopy to image the surface ferrimagnetic order on the itinerant Bi $p$ states, indicating their orbital hybridization with localized Ce $f$ states. We observe suppression of this spin-polarized signature at $E_\mathrm{F}$, coincident with a Fano line shape in the conductance spectra, suggesting the Bi $p$ states partially Kondo screen the $f$ magnetic moments, and this $p-f$ hybridization causes strong Fermi-level band renormalization. The $p$ band flattening is supported by our quasiparticle interference (QPI) measurements, which also show band splitting in agreement with DFT, painting a consistent picture of a strongly interacting magnetic Weyl semimetal.