Miracle-dz/UniFAR-FTUs huggingface dataset:
La información bursátil en Colombia

En Colombia, tal vez por el reducido tamano del mercado accionario, no se ha desarrollado un sistema de informacion bursatil comprensivo, confiable y de facil acceso. La informacion disponible se encuentra dispersa y, en ocasiones, incompleta e imprecisa, especialmente la estadistica historica. En este documento se presentan cifras depuradas y ajustadas por splits, para precio, valor en libros y ganancia por accion, con el objeto de que sirvan para iniciar una base de datos y construir indicadores de evaluacion bursatil. El analisis de las cifras sugiere que los movimientos recientes en el precio de las acciones cuentan con apoyo en los fundamentales.
Analysis of jump behavior in nonlinear electronic circuits using computational geometric methods

It will seek the difficult problem of analysis of operating points of nonlinear electronic circuits, a novel methodical manner. In this work we describe the behavior of electrical circuits by a mixture of algebraic and differential equations. We show how to use a geometric interpretation and geometric algorithms to explicitly compute operation points for a special class of electronic circuits. We demonstrate this using the Van-Der-Pol-Oscillator in two different examples. To that end, we discuss how to trace curves on folded manifolds and show the problem on a suitable representation.
Introduction to the Mathematics of Infectious Diseases

A memory sense amplifier for a semiconductor memory device is provided with a compensation current source device that generates a compensation current and feeds it to an interconnected bit line. The compensation current is selected in such a manner that during readout a potential gradient can be generated and/or maintained in cooperation with a compensation voltage source device on the selected and interlinked bit line device that is substantially constant over time.
Surface Atrial Frequency Analysis in Patients with Atrial Fibrillation:

Introduction: The aims of this study were to evaluate (1) principal component analysis as a technique for extracting the atrial signal waveform from the standard 12‐lead ECG and (2) its ability to distinguish changes in atrial fibrillation (AF) frequency parameters over time and in response to pharmacologic manipulation using drugs with different effects on atrial electrophysiology.
Subspace-Based Striping Noise Reduction in Hyperspectral Images

In this paper, a new algorithm for striping noise reduction in hyperspectral images is proposed. The new algorithm exploits the orthogonal subspace approach to estimate the striping component and to remove it from the image, preserving the useful signal. The algorithm does not introduce artifacts in the data and also takes into account the dependence on the signal intensity of the striping component. The effectiveness of the algorithm in reducing striping noise is experimentally demonstrated on real data acquired both by airborne and satellite hyperspectral sensors.
[Relationship between intrauterine infection and the gene polymorphism of DC-SIGN/DC-SIGNR in the pregnant women of HBV positive].

OBJECTIVE To investigate the influence of the individual genotype differences of DC-SIGN and DC-SIGNR on the mother-to-neonate intrauterine infection of HBV. METHODS The genotypes of the gene DC-SIGN and DC-SIGNR in the pregnant women with HBV positive were detected by PCR and agarose gel electrophoresis. The significant difference of gene diversity of DC-SIGN and DC-SIGNR was analyzed by chi-square test. RESULTS (1) All of 29 cases in intrauterine infection group were 7/7 DC-SIGN genotype. In the non-intrauterine infection group, 7/5 genotype were observed in 2 of 54 cases, and the other 52 cases were 7/7 genotype. The two groups was no significant difference (P = 0.54). (2) 29 cases of intrauterine infection group was observed 4 genotypes of DC-SIGNR such as 7/7, 7/5, 9/7 and 6/5, the genotype frequencies were 0.3793, 0.3448, 0.2414 and 0.0345 respectively. 54 cases of non-intrauterine infection group was found 6 genotypes such as 7/7, 7/5, 9/5, 9/7, 7/6 and 6/5, genotype frequencies were 0.5186, 0.1481, 0.0926, 0.1852, 0.0370 and 0.0185 respectively. The distribution of 7/5 genotype in the intrauterine infection group (29 cases) and the non-intrauterine infection group (54 cases) was statistically significant (P = 0.038) , and no significant difference was found in other genotypes between the two groups (P > 0.05). CONCLUSION The gene DC-SIGN showed relatively little variation in the pregnant women infected with HBV. On the countrary, there were multiple genotypes of the gene DC-SIGNR in these women, and the genotype "7/5" of DC-SIGNR might be one of the susceptibility genes associated with intrauterine infection.
Robust formation flight control system design for Multi-UAVs

Based on the wind tunnel test data of actual unmanned aircraft, the dynamics and kinematics nonlinear model is established. Firstly, the robustness control system of a single unmanned aircraft is designed by the stochastic robustness analysis and design method. Secondly, based on the inner loop stability of single aircraft, a formation flight control method based on the Leader-follower model in three dimensions is proposed. Finally, simulations results of some type of unmanned aircraft formation flight trajectory show the effectiveness of the proposed method.
Phytochemical, antimicrobial and cytotoxic evaluation of Ziziphus spinachristi (L.) stem bark

Ziziphus spina-christi (L.), commonly called jujube, was evaluated for their phytochemical content in the stem bark as well as the antimicrobial and cytotoxic activities. Z. spina-christi bark was extracted with ethanol and the extract was partitioned between aqueous layer and ethyl acetate layer. The ethyl acetate extract was defatted using diethyl ether and used for GC-MS analysis. The aqueous layer was further extracted with ethyl acetate and drop wise addition ammonia solution to obtain alkaline ethyl acetate extract. Both ethyl acetate extract and alkaline ethyl acetate extract were tested for phytochemical content by qualitative analysis and evaluated for their biological activities such as antimicrobial (by agar well diffusion assay and minimum inhibitory concentration determination) and cytotoxic activities (by MTT assay in cell culture). Phytochemical analysis indicates the presence of tannins, flavonoids, terpernoids, saponin glycosides and alkaloids in Z. spina-christi. Ethyl acetate and alkaline ethyl acetate extracts showed antifungal (against Aspergillus fumigatus, Syncephalastrum racemosum and Geotricum candidum), antibacterial (against Streptococcus pneumoniae, Bacillis subtilis and Escherichia coli), and cytotoxic effects (against colon and breast carcinoma cells). In comparison, alkaline ethyl acetate extract showed significantly (p<0.05) higher antimicrobial activity (against A. fumigatus, S. racemosum and S. pneumoniae) and cytotoxic activities as compared to ethyl acetate extract (IC50 of alkaline ethyl acetate and ethyl acetate extracts=196 and 400 μg/well against colon carcinoma cells and 164 and 397 μg/well against breast carcinoma cells, respectively).
Report of a Curriculum Used in a Peer-Delivered Intervention to Reduce Obesity of Adolescents in Southern Appalachia and its Relationship to the National Health Education Standards.

The Team Up for Healthy Living curriculum was designed for a study examining an academia-community partnership approach using college students as peer facilitators to prevent obesity among high school students in Southern Appalachia. It was created by a multidisciplinary team of researchers/investigators representing the fields of Kinesiology, Medicine, Nutrition, Psychology, and Public Health. Multidisciplinary team members presented updated content and activities to peer facilitators as part of training and solicited peer and researcher/investigator feedback to make the information relevant and appropriate for rural high school students. The curriculum was modified and refined to an 8-week program. The current study showed that the Team Up for Healthy Living Curriculum addressed expectations for all 8 National Health Education Standards. Because these standards are accepted in many states, if also proven effective, this curriculum may be easily transferable from research to action without substantial additional resources. This program may meet the critical community needs for adolescent obesity prevention by engaging higher education institutions and students in service, and fostering within them an ethic of civic responsibility. This could offer a win-win relationship between the community and the academy.
A G Protein-coupled Receptor Responsive to Bile Acids*

So far some nuclear receptors for bile acids have been identified. However, no cell surface receptor for bile acids has yet been reported. We found that a novel G protein-coupled receptor, TGR5, is responsive to bile acids as a cell-surface receptor. Bile acids specifically induced receptor internalization, the activation of extracellular signal-regulated kinase mitogen-activated protein kinase, the increase of guanosine 5′-O-3-thio-triphosphate binding in membrane fractions, and intracellular cAMP production in Chinese hamster ovary cells expressing TGR5. Our quantitative analyses for TGR5 mRNA showed that it was abundantly expressed in monocytes/macrophages in human and rabbit. Treatment with bile acids was found to suppress the functions of rabbit alveolar macrophages including phagocytosis and lipopolysaccharide-stimulated cytokine productions. We prepared a monocytic cell line expressing TGR5 by transfecting a TGR5 cDNA into THP-1 cells that did not express TGR5 originally. Treatment with bile acids suppressed the cytokine productions in the THP-1 cells expressing TGR5, whereas it did not influence those in the original THP-1 cells, suggesting that TGR5 is implicated in the suppression of macrophage functions by bile acids.
Laplacian Eigenmaps modification using adaptive graph for pattern recognition

Laplacian Eigenmaps (LE) is a typical nonlinear graph-based (manifold) dimensionality reduction (DR) method, applied to many practical problems such as pattern recognition and spectral clustering. It is generally difficult to assign appropriate values for the neighborhood size and heat kernel parameter for LE graph construction. In this paper, we modify graph construction by learning a graph in the neighborhood of a pre-specified one. Moreover, the pre-specified graph is treated as a noisy observation of the ideal one, and the square Frobenius divergence is used to measure their difference in the objective function. In this way, we obtain a simultaneous learning frame work for graph construction and projection optimization. As a result, we obtain a principled edge weight updating formula which naturally corresponds to classical heat kernel weights. Experimental result using UCI datasets and different classifiers show the feasibility and effectiveness of the proposed method in comparison to conventional LE for the classification.
Perilymph/Modiolar Communication Routes in the Human Cochlea

Objectives: To analyze communication routes between perilymph spaces and the modiolus in the human cochlea. Such pathways are of potential importance with regard to local inner ear drug delivery and pharmacokinetics. Design: We analyzed the surface structure of the human cochlea, using high-resolution scanning electron microscopy (SEM) in macerated and freshly obtained specimens together with light microscopy of celloidin-embedded temporal bones. Results: Combined SEM and light microscopy showed that perilymph and fluid spaces in the modiolar periphery form a common system. The modiolar wall of the scala vestibuli and tympani in the first and second turn is porous, forming a perilymphatic communication route to the perivascular and perineural spaces in the modiolus. A “perimodiolar lymph” or fluid space can be identified in the modiolar periphery. It communicates through a trabecular meshwork of porous membrane and web of connective tissue with the perilymph. The thin mesothelial cell sheets showed pores and displayed signs of vesicular activity. Conclusions: This canalicular system may play a role in the circulation of perilymph in the human cochlea. We suggest that this system may represent an important fluid communication route between modiolus and perilymph and may represent a pathway for future drug and cell-based therapy to the inner ear.
The Impact of Metal Ion Exposure on the Cellular Behavior of Human Osteoblasts and PBMCs: In Vitro Analyses of Osteolytic Processes

Osteolysis in the periprosthetic tissue can be caused by metallic wear particles and ions that can originate from implant surface corrosion. These products influence cellular behavior and stimulate the expression of proinflammatory cytokines. The purpose of this study was to evaluate the impact of CoCr29Mo6 ions on cell survival, differentiation, and cytokine expression in human osteoblasts and peripheral blood mononuclear cells (PBMCs). Thus, we exposed cells with a mixture of 200 µg/L ion solution and determined cell viability and apoptosis/necrosis. Gene expression analyses of osteoblastic and osteoclastic differentiation markers as well as pro-osteolytic mediators (IL-6, IL-8, TNF-α, MCP-1, MMP1, TIMP1) were performed. These markers were also investigated in mixed cultures of adherent and non-adherent PBMCs as well as in co-cultures of human osteoblasts and PBMCs. The ion solution induced necrosis in osteoblasts and PBMCs in single cultures. All examined mediators were highly expressed in the co-culture of osteoblasts and PBMCs whereas in the single cell cultures only IL-6, IL-8, and MMP1 were found to be stimulated. While the applied concentration of the CoCr29Mo6 ion solutions had only marginal effects on human osteoblasts and PBMCs alone, the co-culture may provide a comprehensive model to study osteolytic processes in response to Co and Cr ions.
RESIDUAL INTERNAL LIMITING MEMBRANE AFTER EPIRETINAL MEMBRANE PEELING: Results of the Pan-American Collaborative Retina Study Group

Purpose: To determine the degree of residual internal limiting membrane (ILM) after idiopathic epiretinal membrane (ERM) peeling and the usefulness of staining with brilliant blue G. Methods: A prospective, multicenter, observational study of 98 eyes undergoing pars plana vitrectomy and membrane peeling for idiopathic ERM. All eyes underwent core vitrectomy (20, 23, or 25 gauge) followed by intravitreal triamcinolone to verify that the posterior hyaloid had been removed. Brilliant blue G (0.2 mL of 0.25 mg/mL) was injected into the vitreous cavity and washed out immediately. The ERM was peeled and then the surgeon observed and recorded the characteristics of the underlying ILM. The posterior pole was restained with brilliant blue G (0.2 mL of 0.25 mg/mL), and the same observations on the characteristics of the ILM were recorded. Peeling of the remaining ILM was performed. The main outcome measured was the status of the ILM after ERM peel. Secondary outcomes included best-corrected visual acuity and central macular thickness at 6 months postoperatively. Results: After ERM peel, all of the eyes had residual ILM. In 74 eyes, the ILM was present and damaged, whereas in 24 eyes, the ILM was present and undamaged. In 37 eyes, the operating surgeon was unable to determine the status of the ILM before brilliant blue G staining. At 6 months, the logarithm of the minimum angle of resolution best-corrected visual acuity improved from 0.75 ± 0.39 at baseline to 0.31 ± 0.26 (P < 0.0001). The central macular thickness also improved from 460 ± 91 &mgr;m at baseline to 297 ± 102 &mgr;m (P < 0.003). Conclusion: Internal limiting membrane is frequently still present after ERM peeling. Staining with brilliant blue G facilitates its identification.
Data fusion of infrared and radar for target tracking

A target tracking method based on data fusion of infrared and radar is proposed to improve tracking precision. Unscented Kalman filter (UKF) is applied to process data on distributed fusion architectures. The method combines the advantages of UKF and track-to-track algorithms. The cross-covariances of the two sensors are used to estimate overall covariance and states. The overall estimation is obtained by the track-to-track fusion algorithm for the optimal combination of two correlated estimates. The proposed method is applied to simulating target tracking of infrared and radar. The simulation results show the proposed method has advantages in higher precision, and probability of detection is increased.
The role of the area postrema in the anorectic effects of amylin and salmon calcitonin: behavioral and neuronal phenotyping

Amylin reduces meal size by activating noradrenergic neurons in the area postrema (AP). Neurons in the AP also mediate the eating‐inhibitory effects of salmon calcitonin (sCT), a potent amylin agonist, but the phenotypes of the neurons mediating its effect are unknown. Here we investigated whether sCT activates similar neuronal populations to amylin, and if its anorectic properties also depend on AP function. Male rats underwent AP lesion (APX) or sham surgery. Meal patterns were analysed under ad libitum and post‐deprivation conditions. The importance of the AP in mediating the anorectic action of sCT was examined in feeding experiments of dose–response effects of sCT in APX vs. sham rats. The effect of sCT to induce Fos expression was compared between surgery groups, and relative to amylin. The phenotype of Fos‐expressing neurons in the brainstem was examined by testing for the co‐expression of dopamine beta hydroxylase (DBH) or tryptophan hydroxylase (TPH). By measuring the apposition of vesicular glutamate transporter‐2 (VGLUT2)‐positive boutons, potential glutamatergic input to amylin‐ and sCT‐activated AP neurons was compared. Similar to amylin, an intact AP was necessary for sCT to reduce eating. Further, co‐expression between Fos activation and DBH after amylin or sCT did not differ markedly, while co‐localization of Fos and TPH was minor. Approximately 95% of neurons expressing Fos and DBH after amylin or sCT treatment were closely apposed to VGLUT2‐positive boutons. Our study suggests that the hindbrain pathways engaged by amylin and sCT share many similarities, including the mediation by AP neurons.
BISC authentication algorithm: An efficient new authentication algorithm using three factor authentication for mobile banking

Mobile banking, is a hottest topic in the development of banking sector which is expected to be replaced by online or net banking in the near future. Mobile banking is done through tablet or smartphones when you are away from home at any time. Authentication, Confidentiality and Integrity are the three main aspects of security. As the technology develops, there increase a a strong desire to develop and implement more secure authentication schemes to protect businesses and clients against security threats. Authentication is the first step in access control, and it can be device authentication or user authentication. A three-factor authentication is the use of identity-confirming credentials from three separate categories of authentication factors-typically the knowledge, possession and inherent categories. The knowledge factor includes things something the users knows, inherent factor includes something the users are and the possession factor includes something the users have. The proposed system is a new authentication algorithm, BISC authentication algorithm. Here the proposed system uses a three-factor authentication in which it combines biometrics information with color and smart card to provide security-enhanced user authentication. The proposed system combines the device-based authentication and user-based authentication without exposing the user privacy.
SUBFOVEAL CHOROIDAL THICKNESS IN FELLOW EYES OF PATIENTS WITH CENTRAL SEROUS CHORIORETINOPATHY

Purpose: To evaluate the subfoveal choroidal thickness in the fellow eyes of patients with CSC, a disease often associated with choroidal vascular hyperpermeability even in eyes without subretinal fluid. Methods: In this observational cross-sectional study, we measured the bilateral subfoveal choroidal thickness in patients with unilateral CSC using enhanced depth imaging spectral-domain optical coherence tomography. Areas of choroidal vascular hyperpermeability were visualized with indocyanine green angiography. Results: Sixty-six consecutive Japanese patients (50 men, 16 women; mean age, 52.8 years) with unilateral CSC were examined. The subfoveal choroid in symptomatic eyes was significantly thicker than that in fellow eye (414 ± 109 μm vs. 350 ± 116 μm, P < 0.001, respectively). The subfoveal choroid of eyes with choroidal vascular hyperpermeability was 410 ± 92 μm, which differed significantly (P < 0.001) from the choroid (239 ± 59 μm) of fellow eyes without choroidal vascular hyperpermeability. Conclusion: The subfoveal choroid in the fellow eyes of patients with CSC was thicker in the eyes with choroidal vascular hyperpermeability. Enhanced depth imaging spectral-domain optical coherence tomography can assess the effects of choroidal vascular hyperpermeability by measuring the choroidal thickness noninvasively.
Early identification of recipients with progressive histologic recurrence of hepatitis C after liver transplantation

Approximately half of patients undergoing liver transplantation (LT) for hepatitis C virus (HCV) develop histologic evidence of recurrence within the first postoperative year. Early identification of recipients at risk for more severe recurrence of HCV may be useful in selecting patients for antiviral therapy. We determined whether recipients at greatest risk for more severe recurrence of HCV can be identified by pre‐ and/or early post‐LT HCV‐RNA levels in serum or tissue. Serum and tissue samples were prospectively collected pre‐LT and at 7 days, 4 months, 1 year, and at 3 years posttransplantation from patients undergoing LT for HCV. Hepatitis activity index (HAI) and fibrosis stage (FS) were assessed in all liver biopsies. Forty‐seven patients (32 men) were studied. Higher HCV‐RNA levels at 4 months post‐LT (≥109 copies/mL, n = 29) were associated with higher HAI at 1 year and at 3 years post‐LT. The HAI seen on protocol biopsies at 4 months correlated significantly with fibrosis stage (FS) at 1 year (r = .56, P ≤ .001) and 3 years (r = .53, P = .002). Higher HCV‐RNA levels at 7 days and 4 months post‐LT were sensitive (66% and 84%, respectively) and specific (92% and 63%, respectively) in identifying recipients with an HAI greater than 3 at 3 years. Higher pre‐ and early post‐LT HCV‐RNA levels are associated with more severe recurrence of HCV. The correlation of early HAI with subsequent FS suggests that higher mean HAI will eventually translate into more advanced stages of fibrosis. Patients at risk for more severe post‐LT recurrence of HCV can be identified by early posttransplant HCV‐RNA levels.
Visual Recognition of Equivalent Tactile-Kinesthetic and Verbal Information in Short-Term Memory

Short-term retention of equivalent tactile-kiaesthetic and verbal information was compared, as well as subjects' ability to construct, and visually recognize information. Sixty undergraduate subjects participated, 30 in each of two groups. The first group received information through the fine movements of the subject's right index finger, whereas the second group was presented exactly the same information verbally coded. Both groups had to recognize visually each of 10 mentally constructed patterns, one at a time, depicted as drawings of a target and four distractors. Although both groups performed above chance level, there was a significant difference in the total number of correct recognitions, favoring the verbal one. It is concluded that: (a) the transformation to a visual code is easier for the verbal system than for the kinesthetic one, perhaps because experience in coding visual information from verbal descriptions is greater. (b) If we want to make meaningful comparisons between motor and verbal short-term memory, it is desirable to use tasks as similar as possible for both conditions. The present work suggests one way to achieve the above.