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Analysis of Social Media Impact on Stock Price Movements Using Machine Learning Anomaly detection

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Intelligent Automation & Soft computing 2023年第6期36卷 3405-3423页

作者： Richard cruz Johnson Kinyua charles Mutigwe college of Information Sciences and Technology Pennsylvania State UniversityState CollegePA16801USA Western New England University College of Business1215 Wilbraham RdSpringfieldMA01119USA

The massive increase in the volume of data generated by individuals on social media microblog platforms such as Twitter and Reddit every day offers researchers unique opportunities to analyze financial markets from new *** meme stock mania of 2021 brought together stock traders and investors that were also active on social *** mania was in good part driven by retail investors’discussions on investment strategies that occurred on social media plat-forms such as Reddit during the cOVId-19 *** stock trades by these retail investors were then executed using services like *** this paper,machine learning models are used to try and predict the stock price movements of two meme stocks:GameStop($GME)and AMc Entertainment($AMc).Two sentiment metrics of the daily social media discussions about these stocks on Red-dit are generated and used together with 85 other fundamental and technical indi-cators as the feature set for the machine learning *** is demonstrated that through the use of a carefully chosen mix of a meme stock’s fundamental indica-tors,technical indicators,and social media sentiment scores,it is possible to pre-dict the stocks’next-day closing ***,using an anomaly detection model,and the daily Reddit discussions about a meme stock,it was possible to identify potential market manipulators.

关键词： Machine learning deep learning anomaly detection Reddit r/walstreetbets meme stocks

Physiopathology of ischemic stroke and its modulation using memantine:evidence from preclinical stroke

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Neural Regeneration Research 2021年第3期16卷 433-439页

作者： Hilda Martínez-coria Isabel Arrieta-cruz María-Esther cruz Héctor E.López-Valdés división de Investigación Facultad de MedicinaUniversidad Nacional Autónoma de México(UNAM)Ciudad de MéxicoMéxico Laboratorio Experimental de Enfermedades Neurodegenerativas Facultad de MedicinaUNAM/Instituto Nacional de Neurología y NeurocirugíaCiudad de MéxicoMéxico departamento de Investigación Básica Instituto Nacional de GeriatríaCiudad de MéxicoMéxico Unidad de Investigación en Biología de la Reproducción Laboratorio de NeuroendocrinologíaFacultad de Estudios Superiores ZaragozaUNAMCiudad de MéxicoMéxico Unidad Periférica de Neurociencia Facultad de MedicinaUNAM/Instituto Nacional de Neurología y NeurocirugíaCiudad de MéxicoMéxico

Ischemic stroke is the most common type of cerebrovascular disease and is caused by an interruption of blood flow in the *** this disease,two different damage areas are identifying:the lesion core,in which cells quickly die;and the penumbra(surrounding the lesion core),in which cells are functionally weakened but may recover and restore their *** currently approved treatments for ischemic stroke are the recombinant tissue plasminogen activator and endovascular thrombectomy,but they have a short therapeutic window(4.5 and 6 hours after stroke onset,respectively)and a low percentage of stroke patients actually receive these *** is an approved drug for the treatment of Alzheimer's *** is a noncompetitive,low affinity and use-dependent antagonist of N-methyl-d-aspartate glutamate *** has several advantages over developing a new drug to treat focal ischemic stroke,but the most important is that it has sufficient safe probes in preclinical models and humans,and if the preclinical studies provide more evidence about pharmacological actions in tissue protection and repair,this could help to increase the number of clinical *** present review summarizes the physiopathology of isquemic stroke and the pharmacological actions in neuroprotection and neuroplasticity of memantine in the post stroke stage of preclinical stroke models,to illustrate their potential to improve functional recovery in human patients.

关键词： focal ischemic stroke memantine neuroplasticity neuroprotection stroke therapy

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Inflammatory bowel disease serology in Asia and the West

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World Journal of Gastroenterology 2013年第37期19卷 6207-6213页

作者： Lani Prideaux Michael A Kamm Peter de cruz daniel R van Langenberg Siew c Ng Iris dotan department of Gastroenterology St Vincent’s HospitalFitzroy 3065MelbourneAustralia department of Medicine University of Melbourne department of Medicine Imperial College department of Gastroenterology Box Hill Hospital department of Medicine and Therapeutics Chinese University of Hong Kong Inflammatory Bowel disease center Department of GastroenterologySourasky Medical Center

AIM:To study serological antibodies in caucasians and Asians,in health and inflammatory bowel disease(IBd),in Australia and Hong Kong(HK).METHOdS:Anti-glycan antibodies[anti-chitobioside(AccA),anti-laminaribioside(ALcA)],and anti-mannobioside(AMcA),anti-Saccharomyces cervisiae(gAScA);and atypical perinuclear anti-neutrophil cytoplasmic antibody(pANcA)were tested in IBd patients,their unaffected relatives,and healthy controls in Australia and HK(china).Antibody status(positive or negative)and titre was compared between subjects of different geography,ethnicity and disease ***:Ninety subjects were evaluated:21 crohn’s disease(cd),32 ulcerative colitis(Uc),29 healthy controls,and 8 IBd patient *** eight subjects were Australian(29 caucasian and 19 ethnic Han chinese)and 42 were from HK(all Han chinese).caucasian cd patients had a significantly higher antibody prevalence of gAScA(67%vs 3%,PcA(44%vs 6%,P=0.005),and AMcA(67%vs 15%,P=0.002),whereas HK cd patients had a higher prevalence of only AMcA(58%vs 25%,P=0.035),when compared with Uc and healthy subjects in both *** cd had significantly higher gAScA prevalence(67%vs 0%,Pd titre(median59 vs 9,P=0.002)than HK cd *** and titres of ALcA,AccA and AMcA did not differ between cd in the two *** of at least one antibody was higher in caucasian than HK cd patients(100%vs 58%,P=0.045).pANcA did not differ between countries or ***:Serologic cd responses differ between HK Asian and Australian caucasian *** genetic,environmental or disease pathogenic factors may account for these differences.

关键词： crohn’s disease Ulcerative colitis Serological antibodies Asia Ethnic Anti-Saccharomyces cervisiae antibodies Anti-chitobioside antibodies Antilaminaribioside antibodies Anti-mannobioside antibodies Atypical perinuclear anti-neutrophil cytoplasmic antibodies

Root and leaf functional trait relations in Poaceae species: implications of differing resource- acquisition strategies

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Journal of Plant Ecology 2013年第3期6卷 211-219页

作者： Florian Fort claire Jouany Pablo cruz INRA UMR 1248 AGIRCentre de recherche de ToulouseCS 5262731326 Castanet-TolosanCedexFrance

Aims root systems play an essential role in grassland functioning in both acquisition and storage of ***,root functional traits have not received as much attention as those measured on above-ground organs,and little is known about their *** objec-tives were to test whether morphological and root system traits allowed identification of grass species’functional strategies and to determine whether a relation exists between above-and below-ground *** Functional traits of root tissues(specific root length,diameter,tissue density and nitrogen concentration),whole root systems(root mass,root length density,root mass percentage below a depth of 20 cm and fine root%)and two major leaf traits(specific leaf area and leaf dry matter content)were determined under field conditions and their rela-tions were analysed in eleven perennial temperate Poaceae *** Findings canonical correspondence analysis along axis 1 revealed a gra-dient of species,from those with deep,dense and coarse root systems with a large root mass to those with shallow root sys-tems,thin roots and high specific root length;this suggests strong correlations among root *** between specific root length and specific leaf area reveal two groups of species,which probably indicates different drought-tolerance *** trait syndromes enable ranking grasses along a gradient from conservative-strategy species(from stressful habitats),which display a deep and coarse root system,to acquisitive species(from rich and moist meadows),which display a shallow and thin root *** both types display similar above-ground strategies,drought-tolerant species have lower specific root lengths than drought-sensitive species,revealing more conservative root strategies.

关键词： root functional trait functional group grasses root ecology below-ground strategy

construction of dulac functions for mathematical models in population biology

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International Journal of Biomathematics 2015年第3期8卷 135-154页

作者： Osvaldo Osuna cruz Vargas-de-Leon Instituto de Fisica y Matematicas Universidad MichoacanaEdif. C-3 Cd. Universitaria CP 58040 Morelia Michoacan Mexico Unidad de Medicina Experimental Hospital General de Mexico "Dr. Eduardo Liceaga" DF 06726 Mdxieo

In this paper, we present a method for constructing a dulac function for mathematical models in population biology, in the form of systems of ordinary differential equations in the plane.

关键词： Population models epidemic models chemostat models dulac function nonexistence of periodic orbits.

Machine learning empowers efficient design of ternary organic solar cells with PM6 donor

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Journal of Energy chemistry 2025年第1期 337-347页

作者： Kiran A.Nirmal Tukaram d.dongale Santosh S.Sutar Atul c.Khot Tae Geun Kim School of Electrical Engineering Korea University computational Electronics and Nanoscience Research Laboratory School of Nanoscience and Biotechnology Shivaji University Yashwantrao chavan School of Rural development Shivaji University

Organic solar cells(OScs) hold great potential as a photovoltaic technology for practical ***, the traditional experimental trial-and-error method for designing and engineering OScs can be complex, expensive, and time-consuming. Machine learning(ML) techniques enable the proficient extraction of information from datasets, allowing the development of realistic models that are capable of predicting the efficacy of materials with commendable accuracy. The PM6 donor has great potential for high-performance OScs. However, it is crucial for the rational design of a ternary blend to accurately forecast the power conversion efficiency(PcE) of ternary OScs(TOScs) based on a PM6 ***, we collected the device parameters of PM6-based TOScs and evaluated the feature importance of their molecule descriptors to develop predictive models. In this study, we used five different ML algorithms for analysis and prediction. For the analysis, the classification and regression tree provided different rules, heuristics, and patterns from the heterogeneous dataset. The random forest algorithm outperforms other prediction ML algorithms in predicting the output performance of PM6-based TOScs. Finally, we validated the ML outcomes by fabricating PM6-based TOScs. Our study presents a rapid strategy for assessing a high PcE while elucidating the substantial influence of diverse descriptors.

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Improved resolution of mixed STR profiles using a fully automated differential cell lysis/dNA extraction method

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Forensic Sciences Research 2020年第2期5卷 106-112页

作者： Matthew c.Goldstein Jordan O.cox Lori B.Seman Tracey dawson cruz department of Forensic Science Virginia Commonwealth UniversityRichmondVirginiaUSA

Sexual assault evidence often contains sperm cells,which are typically separated from nonsperm cells using manual differential lysis *** goal of this study was to evaluate the automated QIAGEN QIAcube for this purpose and to compare it to manual QIAGEN and manual organic differential methods using dNA yields and STR profile data for *** yields were determined by qPcR,followed by multiplex STR amplification,cE analysis,and mixture *** automated method was capable of effective cell separation,producing dNA yields sufficient for STR ***,sperm fraction human:male dNA ratios from the QIAcube samples were consistently closer to the desired 1:1 and STR profiles were less likely to result in mixtures,with 6–8fewer female alleles detected(median 1.5 alleles).Ultimately,using the QIAcube for automated differential processing of semen-containing mixtures reduces the need for downstream mixture interpretation and improves STR profile quality with substantially less hands-on time.

关键词： Forensic sciences forensic genetics sexual assault evidence QIAcube differential lysis sperm lysis automated dNA extraction mixture analysis

The effect of environmental contaminants on testicular function

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Asian Journal of Andrology 2011年第4期13卷 585-591页

作者： Premendu Prakash Mathur Shereen cynthia d＇cruz department of Biochemistry and Molecular Biology School of Life Sciences Pondicherry University Pondicherry 605 014 India

Male reproductive health has deteriorated considerably in the last few decades. Nutritional, socioeconomic, lifestyle and environmental factors （among others） have been attributed to compromising male reproductive health. In recent years, a large volume of evidence has accumulated that suggests that the trend of decreasing male fertility （in terms of sperm count, quality and other changes in male reproductive health） might be due to exposure to environmental toxicants. These environmental contaminants can mimic natural oestrogens and target testicular spermatogenesis, steroidogenesis, and the function of both Sertoli and Leydig cells. Most environmental toxicants have been shown to induce reactive oxygen species, thereby causing a state of oxidative stress in various compartments of the testes. However, the molecular mechanism（s） of action of the environmental toxicants on the testis have yet to be elucidated. This review discusses the effects of some of the more commonly used environmental contaminants on testicular function through the induction of oxidative stress and apoptosis.

关键词： apoptosis environmental contaminants male reproduction oxidative stress reactive oxygen species testis spermatogenesis

Extracts from Marine Macroalgae and Opuntia ficus-indica cladodes Enhance Halotolerance and Enzymatic Potential of diazotrophic Rhizobacteria and Their Impact on Wheat Germination Under Salt Stress

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Pedosphere 2018年第2期28卷 241-254页

作者： Abdelwahab RAI Ameur cHERIF cristina cruz Elhafid NABTI département de Microbiologie Faculté des Sciences de la Nature et de la Vie Université Ferhat Abbas Sdtif-1 19000 (Algdrie) Universitg de Béjaia FSNV Laboratoire de Maitrise des Energies Renouvelables (LMER) Equipe de Biomasse et Environnement Targa Ouzemmour Béaia 06000 (Algérie) LR Biotechnology and Bio-Geo Resources Valorization Higher Institute for Biotechnology University of Manouba Sidi Thabet Biotechpole 2020 Sidi Thabet Ariana 2080 (Tunisia) cE3c-centre for Ecology Evolution and Environmental Changes Campo Grande Bloco C-2 Piso 5 Sala 03 Lisboa 1749-016 CPor- tugal)

Soil salinity, which affects more than 6% of the earth’s land surface and more than 20% of its irrigated areas, is a major threat to agriculture. diazotrophic bacteria are among the functional groups of soil microbiota that are threatened by this abiotic stress, as their activity is mostly inhibited by salt stress. Seventy bacterial strains with distinct characteristics were isolated from soils by using N-free Jensen’s selective medium. Based on their ability to produce metabolites of agricultural interest, four strains were selected and identified as Flavobacterium johnsoniae, Pseudomonas putida, Achromobacter xylosoxidans, and Azotobacter chroococcum. The selected strains were grown at different Nacl concentrations (0–600 mmol L^(-1) in N-free broth and 0–2 000 mmol L^(-1) in Luria-Bertani medium) in the presence and absence of glycine betaine (GB), aqueous and hydro-alcoholic extracts from marine macroalgae, Ulva lactuca and Enteromorpha intestinalis, and Opuntia ficus-indica cladodes. The selected bacterial strains, GB, and the aforementioned extracts were tested for their ability to promote the germination of wheat (Triticum durum) seeds at 0–300 mmol L^(-1) Nacl. compared with the results obtained with the synthetic osmoprotectant GB, the extracts from O. ficus-indica, U. lactuca, and E. intestinalis significantly promoted bacterial growth and seed germination under salt stress.

关键词： glycine betaine Ulva lactuca Enteromorpha intestinalis plant growth-promoting rhizobacteria (PGPR) seed germi-nation Triticum durum

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