Mathematical and physical techniques of modeling and simulation of pattern recognition in the stock market

The following article presents the analysis through mathematical and physical techniques of large databases, which are very common today, due to the large number of variables (especially in the information and physics industry) and the amount of information that results from a process, therefore an analysis is necessary that allows the Decision in a responsible manner, looking for scientific criteria that support said decisions, in our case a database of the forex system will be taken. Initially, a study and calculation of different measurements between the samples and their characteristics will be carried out to make a good prediction of the data and their behavior using different classification methods inspired by basic sciences. Below is an explanation of the techniques based on the analysis of data components and the correlations that exist between the variables, which is a technique widely used in physical processes to determine the correlations between variables

Application of the sine-cosine algorithm to the optimal design of a closed coil helical spring

This paper proposes the application of the sinecosine algorithm (SCA) to the optimal design of a closed coil helical spring. The optimization problem addressed corresponds to the minimization of total spring volume subject to physical constraints that represents the closed coil helical spring such as maximum working load, shear stress, and minimum diameter requirements, among other. The resulting mathematical formulation is a complex nonlinear and non-convex optimization model that is typically addressed in literature with trial and error methods or heuristic algorithms. To solve this problem efficiently, the SCA is proposed in this research. This optimization algorithm belongs to the family of the metaheuristic optimization techniques, it works with controlled random processes guided by sine and cosine trigonometric functions, that allows exploring and exploiting the solution space in order to find the best solution to the optimization problem. By presenting as main advantage an easy implementation at any programming language using sequential quadratic programming; eliminating the need to uses specialized and costly software. Numerical results demonstrating that the proposes SCA allows reaching lower spring volume values in comparison with literature approaches, such as genetic algorithms, particle swarm optimization methods, among others. All the numerical simulations have been implemented in the MATLAB software

Spanish validation of the revised depression attitude questionnaire (R-daq)

Purpose: The aim of the study was to develop and validate a Spanish version of the Revised Depression Attitude Questionnaire (R-DAQ). Methods: The R-DAQ was used as a baseline for the study. It was translated and tested to ensure the instrument was appropriate for the target population. 537 Ecuadorian healthcare professionals completed the revised Spanish version of the R-DAQ (SR-DAQ). Statistical and exploratory factor analyses were performed to examine construct validity, internal consistency, readability and floor and ceiling effects. Results: Three factors were obtained: “Professional confidence in depression care”; “Therapeutic optimism about depression”; and “Generalist perspective about depression occurrence, recognition, and management”. The internal consistency of the SR-DAQ was determined by means of Cronbach’s α coefficient, with values ranging between 0.61–0.8. The correlations with the English version reflected adequate validity. The model explained 39% of the variance. Subsequent analysis with a sample restricted to those who had received training in depression produced a model that explained 42% of the variance. Conclusion: The SR-DAQ meets the psychometric requirements for measuring depression attitude in a Spanish-speaking population and shows adequate internal consistency and validity

Estado y prioridades de conservación de los anfibios del departamento del Quindío, Colombia

stat i prioritats de conservació dels amfibis del departament del Quindío, Colòmbia En aquest article presentem una avaluació de l’estat i les prioritats de conservació dels amfibis al Quindío amb l’objectiu de proposar accions per conservar-los. Vam generar una llista d’espècies d’amfibis del departament, vam modelar la distribució potencial de les espècies amenaçades amb l’algoritme de màxima entropia de MaxEnt i en vam avaluar la representativitat en el Sistema Departamental d’Àrees Protegides del Quindío (SIDAPQ). A més a més, vam prioritzar les àrees per a la conservació dels amfibis amb l’algoritme ILV4 adjacency de ConsNet. Vam registrar 45 espècies d’amfibis, el 24,4% de les quals es troben incloses en alguna categoria d’amenaça de la Llista Vermella de la UICN. Els amfibis amenaçats van presentar una distribució i uns registres superiors al 50% dins del SIDAPQ. Les àrees prioritzades per assolir objectius de representativitat del 10, 20 i 30% de la distribució dels amfibis estan totalment fragmentades i només tenen el 30% de la distribució prioritzada al SIDAPQ. Davant d’aquest escenari, proposem una estratègia de conservació de caràcter paisatgístic que inclogui els agroecosistemes, tractant de mantenir-ne l’heterogeneïtat i eliminant-ne o disminuint-ne els factors d’amenaça.Conservation status and priorities of amphibians from the Quindío Department, Colombia We reviewed the conservation status and priorities for amphibians from the Quindío region of Colombia, with the purpose of proposing conservation actions. We modeled the potential distribution of threatened species using the maximum entropy algorithm in MaxEnt and evaluated representability in the Departmental System of Protected Areas for Quindío (Spanish acronym: SIDAPQ). We prioritized areas for amphibian conservation using the algorithm ILV4 adjacency in ConsNet. We recorded 45 species, 24.4% of which are included in threatened categories on the IUCN Red List. Over 50% of the distribution and records of the threatened amphibians occurred inside the SIDAPQ. Prioritized areas to achieve representation goals of 10, 20 and 30% of amphibian distribution are highly fragmented and have only approximately 30% of prioritized distribution in the SIDAPQ. Considering this scenario we propose a conservation strategy on the landscape level that includes agroecosystems, maintaining their heterogeneity and eliminating or mitigating threat factors.En este artículo presentamos una evaluación del estado y prioridades de conservación de los anfibios en el Quindío con el objetivo de proponer acciones para su conservación. Generamos una lista de especies de anfibios del departamento, modelamos la distribución potencial de las especies amenazadas con el algoritmo de máxima entropía de MaxEnt y evaluamos su representatividad en el Sistema Departamental de Áreas Protegidas del Quindío (SIDAPQ). Además, priorizamos las áreas para la conservación de los anfibios con el algoritmo ILV4 adjacency de ConsNet. Registramos 45 especies de anfibios, el 24,4% de las cuales se encuentran incluidas en alguna categoría de amenaza de la Lista Roja de la UICN. Los anfibios amenazados presentaron una distribución y unos registros superiores al 50% dentro del SIDAPQ. Las áreas priorizadas para alcanzar los objetivos de representatividad del 10, 20 y 30% de la distribución de los anfibios están altamente fragmentadas y sólo tienen el 30% de la distribución priorizada en el SIDAPQ. Ante este escenario, proponemos una estrategia de conservación de carácter paisajístico que incluya los agroecosistemas, tratando de mantener su heterogeneidad y eliminando o mitigando los factores de amenaza

Workplace burnout and health issues among Colombian correctional officers.

Introduction Correctional employees typically work under adverse conditions that may enhance the occurrence of different negative psychological states. Burnout constitutes a high-risk phenomenon that may affect people's physical/mental health and welfare, especially in vulnerable occupational groups. Objectives The aim of this study was to characterize the burnout profile of correctional officers, and to associate their burnout profile with health issues and lifestyle factors. Methods The full sample was composed of 219 Colombian correctional officers with a mean age of 30.18 years. A questionnaire composed of three sections was employed: demographic data, burnout, and health information. Results A high proportion of participants reported burnout indicators, also significantly correlated to their health indicators and lifestyle factors. Cluster analyses were used in order to characterize the burnout/age (model A) and burnout/age/psychological disturbance (model B) profiles of correctional officers. Furthermore, significant differences were found when comparing frequencies of alcohol consumption and physical exercise (lifestyle indicators) and perceived social support of officers depending on their profile. Conclusions the discussion focused on the negative impact of burnout on health, and on the importance of strengthening occupational programs aimed at reducing the impact of hazardous working conditions that contribute to the development of burnout, and to the arise different mid and long-term health complains among correctional workers

Simultaneous Minimization of Energy Losses and Greenhouse Gas Emissions in AC Distribution Networks Using BESS

The problem of the optimal operation of battery energy storage systems (BESSs) in AC grids is addressed in this paper from the point of view of multi-objective optimization. A nonlinear programming (NLP) model is presented to minimize the total emissions of contaminant gasses to the atmosphere and costs of daily energy losses simultaneously, considering the AC grid complete model. The BESSs are modeled with their linear relation between the state-of-charge and the active power injection/absorption. The Pareto front for the multi-objective optimization NLP model is reached through the general algebraic modeling system, i.e., GAMS, implementing the pondered optimization approach using weighting factors for each objective function. Numerical results in the IEEE 33-bus and IEEE 69-node test feeders demonstrate the multi-objective nature of this optimization problem and the multiple possibilities that allow the grid operators to carry out an efficient operation of their distribution networks when BESS and renewable energy resources are introduced.Universidad Tecnológica de Bolíva

Etiology of chronic urticaria: the Ecuadorian experience

Background: The purpose of this study was to identify chronic urticaria (CU) etiologies and treatment modalities in Ecuador. We propose that the sample distribution fits the expected one, and that there is an association between the etiology and its treatment. Methods: We performed a retrospective study involving 112 patients diagnosed with CU using a Checklist for a complete chronic urticaria medical history. Demographic and clinical variables were collected. The etiology of CU was classified using the EAACI/GA2LEN/EDF/WAO guideline. Descriptive analyses were performed for demographical and clinical variables. Chi square tests were applied to analyze the fit of distribution and the independence of variables. P values less than 0.05 were considered significant. Results: Among all the patients, 76.8% were diagnosed with chronic spontaneous urticaria (CSU), of which 22.3% had a known etiology or possible exacerbating condition. Food allergy was identified as the most common accompanying condition in patients with CSU (10.7%) (p < 0.01).. On the other hand, 23.2% inducible urticarias (CIndU) were indentified; dermographism was the most common (10.7%) (p < 0.01). Regarding treatment regimens, sg-H1-antihistamines alone represented the highest proportion (44.6%). The combination of any H1-antihistamine plus other drug was a close second (42.0%) (p < 0.01). Almost 48% of CSUs of unknown etiology were treated with any antihistamine plus another drug. In patients with known etiology, sg-antihistamines alone (44.0%) was the most common management. In addition, 53.8% of CIndUs were treated with sg-antihistamines alone. Though, these associations were not statistically significant. Conclusion: CSU is the most frequent subtype of CU. Modern non-sedating antihistamines in licensed doses are the drug of choice. Nevertheless, a great proportion of patients require the addition of another type of medication

Neutrino-less Double Beta Decay and Particle Physics

We review the particle physics aspects of neutrino-less double beta decay. This process can be mediated by light massive Majorana neutrinos (standard interpretation) or by something else (non-standard interpretations). The physics potential of both interpretations is summarized and the consequences of future measurements or improved limits on the half-life of neutrino-less double beta decay are discussed. We try to cover all proposed alternative realizations of the decay, including light sterile neutrinos, supersymmetric or left-right symmetric theories, Majorons, and other exotic possibilities. Ways to distinguish the mechanisms from one another are discussed. Experimental and nuclear physics aspects are also briefly touched, alternative processes to double beta decay are discussed, and an extensive list of references is provided.Comment: 96 pages, 38 figures. Published versio

RNA CoSSMos: Characterization of Secondary Structure Motifs—a searchable database of secondary structure motifs in RNA three-dimensional structures

RNA secondary structure is important for designing therapeutics, understanding protein–RNA binding and predicting tertiary structure of RNA. Several databases and downloadable programs exist that specialize in the three-dimensional (3D) structure of RNA, but none focus specifically on secondary structural motifs such as internal, bulge and hairpin loops. The RNA Characterization of Secondary Structure Motifs (RNA CoSSMos) database is a freely accessible and searchable online database and website of 3D characteristics of secondary structure motifs. To create the RNA CoSSMos database, 2156 Protein Data Bank (PDB) files were searched for internal, bulge and hairpin loops, and each loop's structural information, including sugar pucker, glycosidic linkage, hydrogen bonding patterns and stacking interactions, was included in the database. False positives were defined, identified and reclassified or omitted from the database to ensure the most accurate results possible. Users can search via general PDB information, experimental parameters, sequence and specific motif and by specific structural parameters in the subquery page after the initial search. Returned results for each search can be viewed individually or a complete set can be downloaded into a spreadsheet to allow for easy comparison. The RNA CoSSMos database is automatically updated weekly and is available at http://cossmos.slu.edu