On the Detection of CMB B-modes from Ground at Low Frequency

The primordial CMB $B$-mode search is on the spotlight of the scientific community due to the large amount of cosmological information that is encoded in the primeval signal. However, the detection of this signal is challenging from the data analysis point of view, due to the relative low amplitude compared to the foregrounds, the lensing contamination coming from the leakage of $E$-modes, and the instrumental noise. Here, we studied the viability of the detection of the primordial polarization $B$-mode with a ground-based telescope operating in the microwave low-frequency regime (i.e., from 10GHz-120GHz) in a handful of different scenarios: i. the instrument's channels distribution and noise, ii. the tensor-to-scalar ratio ($r$) detectability considering different possible $r$ values and degrees of delensing, iii. the effect of including a possible source of polarized anomalous microwave emission (AME), iv. the strengths and weaknesses of different observational strategies and, v. the atmospheric and systematic noise impact on the recovery. We focused mainly on the removal of galactic foregrounds as well as noise contamination by applying a full-parametric pixel-based maximum likelihood component separation technique. Moreover, we developed a numerical methodology to estimate the residuals power spectrum left after component separation, which allow us to mitigate possible biases introduced in the primordial $B$-mode power spectrum reconstruction. Among many other results, we found that this sort of experiment is capable of detecting Starobinsky's $r$ even when no delensing is performed or, a possible polarized AME contribution is taken into account. Besides, we showed that this experiment is a powerful complement to other on-ground or satellite missions, such as LiteBIRD, since it can help significantly with the low-frequency foregrounds characterization.Comment: 28 pages, 18 figures, submitted to JCA

Lost and found: the radial quantum number of Laguerre-Gauss modes

We introduce an operator linked with the radial index in the Laguerre-Gauss modes of a two-dimensional harmonic oscillator in cylindrical coordinates. We discuss ladder operators for this variable, and confirm that they obey the commutation relations of the su(1,1) algebra. Using this fact, we examine how basic quantum optical concepts can be recast in terms of radial modes.Comment: Some minor typos fixed

A set of software tools to build an author assessment package on Moodle: Implementing the AEEA proposal

A set of new types of assessment is required for learning management systems (LMSs), and there is a need for a way to assess lifelong adaptive competencies. Proposed solutions to these problems need to preserve the interoperability, reusability, efficiency and abstract modeling already present in LMSs. This paper introduces a set of software tools for an author assessment package on the LMS Moodle being developed as part of adaptive e-learning engine architecture (AEEA). The principal features of this set are: 1) The set avoid editing items for a 360-degree feedback evaluation, 2) Whole items and tests are linked to levels of competencies acquisition, 3) The competency-based eassessment data model are based on e-learning specification and complemented with XML data on the appraised competencies, 4) Items and tests are storage in repositories, and 5) The tools are integrated within Moodle to facilitate the design of an assessment plan

RESEÑAS-HALCÓN PEREGRINO FÁBULA PARA TIEMPOS OSCUROS: EL OFICIO DE ESCRIBIR Y LA NATURALEZA HUMANA

Halcón peregrino, fábula para tiempos oscuros, último poemario de José Ignacio Correa, licenciado en Español de la Universidad Pedagógica Nacional y magíster del Instituto Caro y Cuervo, denota madurez de estilo y gran manejo del lenguaje, así como una profunda actitud de reflexión frente al quehacer poético y la naturaleza humana. El texto está dividido en dos secciones. La primera titulada Halcón peregrino, la segunda Animal de cieno y luz

Looking for signatures of the Left-Right Twin Higgs model with the ATLAS detector at the LHC

The twin Higgs mechanism has recently been proposed to solve the little hierarchy problem. The phenomenology of this model is presented, and the possibility to observe some of the signatures predicted by this model using the ATLAS detector at the LHC is discussed

Parkinson disease analysis using supervised and unsupervised techniques

Parkinson’s disease is classified as a disease of neurological origin, which is degenerative and chronic. Currently, the number of people affected by this disease has increased, one in 100 people over 60 years old, although it has been shown that the onset of this disease is approximately 60 years of age. Cases have also been identified of this disorder in patients as young as 18 years old suffer from this disease. Many tests have been developed throughout the literary review in order to identify patients tending to suffer from this disease that currently massifies its prevalence in the world. This article shows the implementation of different machine learning techniques such as LWL, ThresholdSelector, Kstar, VotedPercepton, CVParameterSelection, based on a test performed on experimental individuals and controls in order to identify the presence of the disease

Prevalence of four statin benefit groups in a population of the Caribbean region of Colombia

Objectives: To estimate the prevalence of four Statin Benefit Groups (SBG) according to the 2018 ACC/AHA Multisociety Guideline on the Management of Blood Cholesterol, in a population of the Caribbean region of Colombia enrolled to DTC program Mutual SER-EPS in 2015 Methods: Data on a history of hyperlipidemia was collected by study investigators at including adults patients enrolled to DTC program Mutual SER-EPS in 2015 (N = 64,667) with ICD-10 diagnosis of hyperlipidemia (E78), or with a personal history of hyperlipidemia; or with abnormal lipid profile; or patients under treatment with lipid-lowering drugs. The four SBG were comprised adult patients $21 years of age with clinical atherosclerotic cardiovascular disease (ASCVD) (SBG1); adults$21 years of age with LDL-C $190 mg/dL (not due to secondary modifiable causes) (SBG2); adults aged 40 to 75 years without ASCVD, but with diabetes and with LDL-C 70 to 189 mg/dL (SBG3); and adults ages 40 to 75 years without ASCVD or diabetes, with LDL-C 70 to 189 mg/dL, and an estimated 10-year risk for ASCVD of$ 20% as determined by the Framingham Risk Score (SBG4). The prevalence of statin use by SBG and factors associated with statin use were estimated. Results: The prevalence of SBG1, SBG2, SBG3 and SBG4 in patients enrolled to DTC program Mutual SER-EPS in 2015 were 4.6% (2,985), 0.5% (337), 2.5% (1,633) and 1.3% (891), respectively. The prevalence of statin use in SBG1, SBG2, SBG3 and SBG4 were 69.1% (2,064), 40.6% (137), 47% (768) and 59.1% (463), respectively. Arterial hypertension (OR: 2.70; 95% IC 1.70-4.28) and personal history of ASCVD (OR: 3.43; 95% IC 2.15-5.46) were very significantly associated with statin use. Conclusions: The prevalence of SBG and statin use in patients enrolled to DTC program Mutual SEREPS in 2015 were 9% (5,846) and 58.7% (3,432), respectively

Prevalence of familial hyperlipidemia in the adult population of the Colombian Caribbean

Objectives: To estimate the prevalence of Familial Hyperlipidemia (FH) in a population of the Colombian Caribbean affiliated with Colombian Public Health Insurance Company (PHIC) and project this estimate to the population of the Colombian Caribbean. Methods: Data on a history of hyperlipidemia was collected by study investigators at including adults patients affiliated with PHIC (64,667) with ICD-10 diagnosis of hyperlipidemia (E78), or with a personal history of hyperlipidemia; or with abnormal lipid profile; or patients under treatment with lipid-lowering drugs. Data on personal or family history of premature coronary artery disease (CAD), presence of xanthomas and family history of FH were included. FHHe corresponded to LDL-C .190 mg/dL (5 mmol/L) for adults and/or with 1 first-degree relative similarly affected or with CAD. FHHo corresponded to LDL-C .500 mg/dL (13 mmol/ L) or LDL-C .300 mg/dL (8 mmol/L) under treatment with statins and/or 1 or both parents having clinically diagnosed FH. For the projection of the estimated prevalence of FH to the population of the Colombian Caribbean, the data of the adult population projections for the Colombian Caribbean of 2015 (general 10,442,134, adults 6,685,734) of the Departamento Administrativo Nacional de Estadisticas (DANE) were used. Results: If we assume that 1 of 5 patients with LDL-C .190 mg/dL (5 mmol/L) may have HF. The prevalence of patients with FH was 0.13% (87/64,667). The prevalence of adults with heterozygous FH (FHHe) was 0.13% (85/64,639). The prevalence of adults with homozygous HF (FHHo) was 0.0015% (1/64,639). Applying these estimates to the general population of Colombian Caribbean in 2015, the estimated number of cases of HF, FHHe and FHHo in the Caribbean Colombian could be approximately 13,574, 8,691 and 140, respectively. Conclusions: The estimated prevalence of FH, FHHe and FHHo in Colombian Caribbean was 1 of 769, 1 of 769 and 2 of 100,000 patients, respectivel

Tumores malignos primarios del hígado

Treinta y seis tumores malignos primarios del hígado fueron seleccionados de protocolos de patología en un periodo de 20 años, Los hepatomas continúan siendo bastante raros en el mundo occidental. Existen regiones del África y Asia en que es endémico.Aunque en la mayoría de los pacientes la consulta es debida a dolor y masa abdominal por crecimiento del tumor, gracias a los adelantos recientes en los métodos diagnósticos, pequeños tumores están siendo cada vez mas diagnosticados. La detección temprana en individuos de alto riesgo se obtiene mucho mejor con determinaciones de AFP y ultrasonografía hepática. El TAC y la arteriografía selectiva son de mucho valor en definir la anatomía y resecabilidad del tumor. El porcentaje de sobrevida a los cinco años es del 20%.La resección hepática es el único tratamiento curativo. Métodos paliativos lo constituyen la quimioterapia, la hipertermia regional y los rayos laser