Dark Left-Right Gauge Model: SU(2)_R Phenomenology

In the recently proposed dark left-right gauge model of particle interactions, the left-handed fermion doublet $(\nu,e)_L$ is connected to its right-handed counterpart $(n,e)_R$ through a scalar bidoublet, but $\nu_L$ couples to $n_R$ only through $\phi_1^0$ which has no vacuum expectation value. The usual R parity, i.e. $R = (-)^{3B+L+2j}$, can be defined for this nonsupersymmetric model so that both $n$ and $\Phi_1$ are odd together with $W_R^\pm$. The lightest $n$ is thus a viable dark-matter candidate (scotino). Here we explore the phenomenology associated with the $SU(2)_R$ gauge group of this model, which allows it to appear at the TeV energy scale. The exciting possibility of $Z' \to 8$ charged leptons is discussed.Comment: 12 pages, 2 figure

Investigating IoT Middleware Platforms for Smart Application Development

With the growing number of Internet of Things (IoT) devices, the data generated through these devices is also increasing. By 2030, it is been predicted that the number of IoT devices will exceed the number of human beings on earth. This gives rise to the requirement of middleware platform that can manage IoT devices, intelligently store and process gigantic data generated for building smart applications such as Smart Cities, Smart Healthcare, Smart Industry, and others. At present, market is overwhelming with the number of IoT middleware platforms with specific features. This raises one of the most serious and least discussed challenge for application developer to choose suitable platform for their application development. Across the literature, very little attempt is done in classifying or comparing IoT middleware platforms for the applications. This paper categorizes IoT platforms into four categories namely-publicly traded, open source, developer friendly and end-to-end connectivity. Some of the popular middleware platforms in each category are investigated based on general IoT architecture. Comparison of IoT middleware platforms in each category, based on basic, sensing, communication and application development features is presented. This study can be useful for IoT application developers to select the most appropriate platform according to their application requirement

Flavour Changing Neutral Currents, Weak-Scale Scalars and Rare Top Decays

We examine the decays $t\rightarrow c\gamma$ and $c Z^0$ in the Standard Model with an extra scalar doublet and no discrete symmetry preventing tree-level flavour changing neutral currents. The Yukawa couplings of the new scalars are assumed to be proportional to fermion masses, evading bounds on FCNC's from the light quark sector. These rare top decays may be visible at the SSC.Comment: (some wording changed, and several references added) 13 pages, 2 figures included, uses harvmac.tex and epsf.tex, UCSD/PTH 93-0

The Caenorhabditis elegans Iodotyrosine Deiodinase Ortholog SUP-18 Functions through a Conserved Channel SC-Box to Regulate the Muscle Two-Pore Domain Potassium Channel SUP-9

Loss-of-function mutations in the Caenorhabditis elegans gene sup-18 suppress the defects in muscle contraction conferred by a gain-of-function mutation in SUP-10, a presumptive regulatory subunit of the SUP-9 two-pore domain K+ channel associated with muscle membranes. We cloned sup-18 and found that it encodes the C. elegans ortholog of mammalian iodotyrosine deiodinase (IYD), an NADH oxidase/flavin reductase that functions in iodine recycling and is important for the biosynthesis of thyroid hormones that regulate metabolism. The FMN-binding site of mammalian IYD is conserved in SUP-18, which appears to require catalytic activity to function. Genetic analyses suggest that SUP-10 can function with SUP-18 to activate SUP-9 through a pathway that is independent of the presumptive SUP-9 regulatory subunit UNC-93. We identified a novel evolutionarily conserved serine-cysteine-rich region in the C-terminal cytoplasmic domain of SUP-9 required for its specific activation by SUP-10 and SUP-18 but not by UNC-93. Since two-pore domain K+ channels regulate the resting membrane potentials of numerous cell types, we suggest that the SUP-18 IYD regulates the activity of the SUP-9 channel using NADH as a coenzyme and thus couples the metabolic state of muscle cells to muscle membrane excitability.National Institutes of Health (U.S.) (NIH Grant GM24663)National Science Foundation (U.S.) (Graduate Research Fellowship by NSFC Grant 31371253)National Institutes of Health (U.S.) (NIH predoctoral training grant)Howard Hughes Medical Institute (Investigator

On competitive bidding: scoring and position probability graphs

Iso-score curves graph (iSCG) and mathematical relationships between Scoring Parameters (SP) and Forecasting Parameters (FP) can be used in Economic Scoring Formulas (ESF) used in tendering to distribute the score among bidders in the economic part of a proposal. Each contracting authority must set an ESF when publishing tender specifications and the strategy of each bidder will differ depending on the ESF selected and the weight of the overall proposal scoring. The various mathematical relationships and density distributions that describe the main SPs and FPs, and the representation of tendering data by means of iSCGs, enable the generation of two new types of graphs that can be very useful for bidders who want to be more competitive: the scoring and position probability graphs

Magnetic and Structural Phase Transitions in the Spinel Compound Fe1+xCr2-xO4

Neutron and X-ray diffraction, magnetic susceptibility, and specific heat measurements have been used to investigate the magnetic and structural phase transitions of the spinel system Fe1+xCr2-xO4(0.0<=x<=1.0). The temperature versus Fe concentration (x) phase diagram features two magnetically ordered states and four structural states below 420 K. The complexity of the phase diagram is closely related to the change in the spin and orbital degrees of freedom induced by substitution of Fe ions for Cr ions. The systematic change in the crystal structure is explained by the combined effects of Jahn-Teller distortion, spin-lattice interaction, Fe2+-Fe3+ hopping, and disorder among Fe2+, Fe3+, and Cr3+ ions

Valoración del Desarrollo Grafico Motor del Niño Angel de III Nivel en el Proceso de Enseñanza Aprendizaje del Colegio Alfonso Cortes del Turno Vespertino en el Primer Semestre del Año 2015

Nuestro trabajo de investigación con el enfoque de investigación acción lo realizamos en el colegio Alfonso Cortes, el cual nos hizo detonar una conciencia crítica, nos ayudó a comprender los problemas prácticos de la docente e intervenir en la práctica para ocasionar una mejora del caso. Por medio de la observación detectamos el caso del infante Ángel, el cual presentaba varias dificultades de aprendizaje, pero más preocupante era su deficiencia grafo motriz. Este trabajo, tuvo como propósito identificar las estrategias que utiliza la docente para el desarrollo grafico motor, analizando el entorno familiar en que se desarrolla el niño para así determinar los factores que intervienen en el proceso de aprendizaje del mismo. Nuestra investigación, está sustentada por los aportes de diferentes teóricos que abordan las diferentes definiciones de grafo motricidad, aspectos que se deben de desarrollar para el dominio de la escritura, la evolución grafica infantil, las técnicas para madurar la grafo motricidad y la correcta prensión del lápiz. Aplicamos cuatro planes de acción trabajando diferentes actividades como: juegos de palmas, coloreo, rasgado, cantos con gesticulaciones, decorado con bodoques, lanzamientos de objetos, modelado con plastilina y trazo de líneas con tiza. Ante todo esto se concluyó que el niño puede trabajar y superar las dificultades, sin embargo para su seguimiento la docente debe de incorporar algunas de estas actividades en todos los planes de clase. Además de tener el apoyo del hogar retomando asistencias diarias al centro de estudio, puesto que por más que la docente desee ayudarlo no se podrá notar muchos avances

Ensenanza de calores éticos

Esta investigación tuvo como objetivos conocer: 1º. Si los profesores y/o investigadores de la facultad de medicina, les han hablado y/o enseñado valores como el humanismo, la moral, la ética, la bioética, la objeción de conciencia, el juramento hipocrático. 2º. Si en este momento de su carrera ha cambiado su significado de ser médico y el ejercicio de la medicina tiene como objetivo analizar dicha modificación o transformación en los alumnos que cursan del 1º. - 4º. Año. Se elaboró una encuesta semiestructurada conteniendo varias categorías de análisis. Esta encuesta fue validada por un grupo de expertos (técnica Delphi) y se apega a los lineamientos éticos presentando en dicho instrumento, la carta de consentimiento informado. Para esta participación se eligió presentar solo los datos que corresponden a la sexta categoría de análisis. La población de estudio fue de 550 alumnos elegidos al azar, alumnos inscritos del 1º al cuarto año de medicina. El tamaño de la muestra se calculó con la fórmula para poblaciones pequeñas. Los datos obtenidos se sometieron al análisis estadístico SPSS versión 15, realizando tablas de contingencia para determinar el grado de dependencia entre el género y la edad contra las diferentes variables (preguntas contenidas en cada categoría de análisis) Ver anexo 1 con resultados del análisis. Se encontró que los profesores si les han hablado de la ética, la moral, la bioética, el juramento hipocrático. Algunos estudiantes admitieron haber cambiado el significado de ser médico y de su ejercicio

Magnetic Properties of Ab initio Model for Iron-Based Superconductors LaFeAsO

By using variational Monte Carlo method, we examine an effective low-energy model for LaFeAsO derived from an ab initio downfolding scheme. We show that quantum and many-body fluctuations near a quantum critical point largely reduce the antiferromagnetic (AF) ordered moment and the model not only quantitatively reproduces the small ordered moment in LaFeAsO, but also explains the diverse dependence on LaFePO, BaFe2As2 and FeTe. We also find that LaFeAsO is under large orbital fluctuations, sandwiched by the AF Mott insulator and weakly correlated metals. The orbital fluctuations and Dirac-cone dispersion hold keys for the diverse magnetic properties.Comment: 4 pages, 4 figure