The supersymmetric modified Poschl-Teller and delta-well potentials

New supersymmetric partners of the modified Poschl-Teller and the Dirac's delta well potentials are constructed in closed form. The resulting one-parametric potentials are shown to be interrelated by a limiting process. The range of values of the parameters for which these potentials are free of singularities is exactly determined. The construction of higher order supersymmetric partner potentials is also investigated.Comment: 20 pages, LaTeX file, 4 eps figure

Non-Hermitian SUSY Hydrogen-like Hamiltonians with real spectra

It is shown that the radial part of the Hydrogen Hamiltonian factorizes as the product of two not mutually adjoint first order differential operators plus a complex constant epsilon. The 1-susy approach is used to construct non-hermitian Hamiltonians with hydrogen spectra. Other non-hermitian Hamiltonians are shown to admit an extra `complex energy' at epsilon. New self-adjoint hydrogen-like Hamiltonians are also derived by using a 2-susy transformation with complex conjugate pairs epsilon, (c.c) epsilon.Comment: LaTeX2e file, 13 pages, 6 EPS figures. New references added. The present is a reorganized and simplified versio

Seroprevalence of bovine viral diarrhea virus (BVDV) in cattle from Sotaquirá, Colombia

Worldwide distributed Bovine Viral Diarrhea Virus (BVDV) represents a high risk of infection in most bovine farms, in which it is associated with gastrointestinal, respiratory, and reproductive diseases. The purpose of this research was to establish the seroprevalence and the main risk factors associated with the presentation of BVDV in the municipality of Sotaquirá, Colombia. Samples were taken from 1000 cattle of Holstein, Ayrshire, Jersey, Normande Gyr and Holstein x Gyr. Epidemiological surveys were implemented, reproductive and management variables were taken into consideration. Indirect ELISA was performed to detect specific antibodies against BVDV using the commercial kit SERELISA® BVD p80 Ab Mono Blocking. The overall seroprevalence of antibodies against BVDV was 42.5% (425/1000), where the Gyr breed (59.1% apparent prevalence (AP); 60.3% real prevalence (PR)) and the age group > 4 years (53.0% PA; 54.4% PR) presented the highest seroprevalences. A significant statistical association was found for the breed, age, management practices evaluated and the presentation of PI3 (p ≤ 0.05). Age group > 4 years, Normande breed, presentation of PI3 and grazing lease were established as risk factors associated with BVDV in the herds. These infections are mainly associated with dairy cattle and herds with many animals, so it is important to consider vaccination plans as a preventive system and follow up on the most common diseases

Content Analysis of Digital Media Coverage of the Human Papillomavirus Vaccine School-Entry Requirement Policy in Puerto Rico

BACKGROUND: In August 2018, Puerto Rico (PR) became the 4th state or territory in the United States to adopt a human papillomavirus (HPV) vaccine school-entry requirement, for students 11-12 years old. Evidence suggests that the content of media coverage may impact people\u27s perception of HPV vaccine and their willingness to vaccinate. This study aimed to analyze the content of digital news coverage related to the implementation of the policy in PR. METHODS: A content review was conducted of digital media published from January 2017 through December 2018. The content reviewed was carried out in two steps: 1) creating a matrix to summarize each article\u27s content about the policy and 2) qualitative analysis using a grounded theory approach. RESULTS: The search resulted in 34 articles obtained from 17 online local and international news outlets that reported the policy\u27s implementation. Analyses showed that 61% of the news articles did not mention the number of required doses, and 79% discussed the new policy concerning cancer prevention. In 2017, news coverage focused mostly on describing the policy, while 2018 coverage focused on controversies surrounding the implementation. Neutral emergent codes included: 1) Description of the policy; 2) Information about HPV related cancers; and 3) General information about HPV vaccine. Negative emergent codes included: 1) infringement to patient and parental autonomy; 2) Hesitancy from the political sector, and 3) Hesitancy from groups and coalitions. Positive content included: 1) knowledge and acceptance of HPV vaccine for cancer prevention; 2) importance of education and protective sexual behaviors; and 3) new vaccination law proposal. CONCLUSIONS: Most of the media coverage in PR was neutral and included limited information related to the vaccine, HPV, and HPV-related cancers. Neutral and negative themes could influence public concerns regarding the new policy, as well as HPV vaccination rates in PR

El ciclo celular

ResumenEl proceso conocido como ciclo celular es de gran importacia para la célula ya que tiene como función la formación completa de una nueva célula, evitando en lo posible la creación de células con múltiples errorres, lo cual le permite al organismo permanecer en un constante equilibrio, previeniendo así aquellos desórdenes que pueden perjudicar su salud; de esta manera, todas las célular están controladas por proteínas que no permiten que se presenten situaciones desastrosas para un ser vivo.[Lomanto LD, Ortiz OL, Bretón CO, Gómez AL, Mesa VM. El ciclo celular. MedUNAB 2003; 6(16):21-29].Palabras clave: Ciclo celular, factor promotor de mitosis, proteína RB o 104, clinicas, cinasas

Programa de manejo, mejoramiento y difusión de herramientas para la gestión integrada de los recursos hídricos

En el presente proyecto realizado en el periodo de verano 2021 por parte del Proyecto de Aplicación Profesional (PAP) San Pedro de Valencia: renovación urbana, saneamiento ambiental y emprendimientos turísticos perteneciente al Programa de Manejo y Mejoramiento Hidráulico dentro del Valle de Mazatepec en donde se buscó continuar con los trabajos de mejora en la gestión y uso del recurso del agua, trabajos que comenzaron en 2018 en el dialogo con pobladores de la región y que continuo con la propuesta de un humedal artificial para sanear el rio de los contaminantes presentes, así como la implementación de humedales artificiales a escala casa habitación para que las personas lo implementaran en sus viviendas para darle un tratamiento a las aguas negras antes de llegar al río. El presente proyecto buscó dar seguimiento en el diseño de humedales artificiales de flujo subsuperficial en terreno ejidales que serán donados para la construcción de estos. El río de Ahuisculco desde hace ya varios años presenta contaminación, dañando el bienestar de los pobladores y deteriorando el ecosistema que le rodea, por lo que con la colaboración de distintos agentes en Ahuisculco y el PAP San Pedro de Valencia se busca que con la construcción de un humedal artificial de flujo subsuperficial en uno de los puntos cercanos al rio se logre reducir las concentraciones de contaminantes. Los principales objetivos para el ciclo de verano fueron la zonificación de las etapas de tratamiento del humedal, la revisión de las propuestas del tren de proceso para la reducción de contaminantes con relación a la norma y el área dispuesta para la construcción, así como se buscó la identificación de los detalles del terreno para su deshierbe, nivelación y construcción de los módulos de tratamiento.ITESO, A.C

SDSS-IV MaNGA : the MaNGA dwarf galaxy sample presentation

M.C.D. acknowledges support from CONACYT "Ciencia de Frontera" grant 320199. M.C.D. and H.M.H.T. acknowledge support from UC MEXUS-CONACYT grant CN-17-128. A.R.P. acknowledges support from the CONACyT "Ciencia Basica" grant 285721. E.A.O. acknowledges support from the SECTEI (Secretaría de Educación, Ciencia, Tecnología e Innovación de la Ciudad de México) under the Postdoctoral Fellowship SECTEI/170/2021 and CM-SECTEI/303/2021. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions.We present the MaNGA Dwarf galaxy (MaNDala) Value Added Catalog (VAC), from the final release of the Sloan Digital Sky Survey-IV program. MaNDala consists of 136 randomly selected bright dwarf galaxies with M* −18.5, making it the largest integral field spectroscopy homogeneous sample of dwarf galaxies. We release a photometric analysis of the g, r, and z broadband imaging based on the DESI Legacy Imaging Surveys, as well as a spectroscopic analysis based on the Pipe3D SDSS-IV VAC. Our release includes the surface brightness (SB), geometric parameters, and color profiles, Sérsic fits as well as stellar population properties (such as stellar ages, metallicities, and star formation histories), and emission lines' fluxes within the FOV and the effective radii of the galaxies. We find that the majority of the MaNDala galaxies are star-forming late-type galaxies with 〈nSersic,r〉∼1.6 that are centrals (central/satellite dichotomy). MaNDala covers a large range of SB values (we find 11 candidate ultra-diffuse galaxies and three compact ones), filling the gap between classical dwarfs and low-mass galaxies in the Kormendy Diagram and in the size–mass/luminosity relation, which seems to flatten at 108 2, while the last 20% was at 〈z〉 < 0.3. Finally, a bending of the sSFR-M * relation at M* ∼ 109 M⊙ for the main-sequence galaxies seems to be supported by MaNDala.Publisher PDFPeer reviewe