A database/knowledge structure for a robotics vision system

Desirable properties of robotics vision database systems are given, and structures which possess properties appropriate for some aspects of such database systems are examined. Included in the structures discussed is a family of networks in which link membership is determined by measures of proximity between pairs of the entities stored in the database. This type of network is shown to have properties which guarantee that the search for a matching feature vector is monotonic. That is, the database can be searched with no backtracking, if there is a feature vector in the database which matches the feature vector of the external entity which is to be identified. The construction of the database is discussed, and the search procedure is presented. A section on the support provided by the database for description of the decision-making processes and the search path is also included

A Mutagenetic Tree Hidden Markov Model for Longitudinal Clonal HIV Sequence Data

RNA viruses provide prominent examples of measurably evolving populations. In HIV infection, the development of drug resistance is of particular interest, because precise predictions of the outcome of this evolutionary process are a prerequisite for the rational design of antiretroviral treatment protocols. We present a mutagenetic tree hidden Markov model for the analysis of longitudinal clonal sequence data. Using HIV mutation data from clinical trials, we estimate the order and rate of occurrence of seven amino acid changes that are associated with resistance to the reverse transcriptase inhibitor efavirenz.Comment: 20 pages, 6 figure

Pulmonary Vascular Endothelial Cells

Pulmonary vascular endothelial cells (ECs) line the surface of the lung vasculature and accommodate the various levels of blood flow. Pulmonary endothelium is a critical regulator of vascular homeostasis by inhibiting coagulation of the blood. The ECs bind tissue factor pathway inhibitors (TFPI), modulate hemostasis with opposing effects such as antiplatelet, anticoagulant and fibrinolytic properties. Lung endothelium regulates synthesis and metabolism of vasoactive compounds such as nitric oxide and endothelin-1, both potent regulators of vascular tone. Cytokines, chemokines, interleukins, adhesion molecules, and growth factors can be secreted by pulmonary ECs with positive and adverse effects. Pulmonary endothelium exhibits heterogeneity with diverse expression of molecules and specific differences in signaling induced by various infections such as Gram-positive bacteria. The distinction of macro or microvascular endothelium occurs from the larger vessels to small capillaries in the lung alveoli system. Lectin-binding patterns discriminate between pulmonary artery and pulmonary microvascular capillary endothelium. The lung is one of the body’s organs with the highest expression of vascular endothelial growth factor that stimulates small vessel formation of the microvascular endothelium. Acute respiratory distress syndrome and acute chest syndrome in sickle cell disease are two prototypes of devastating diseases caused by pulmonary EC dysfunction

Nutritional Status and Infant and Young Child Feeding (IYCF) Practices among Buhid Mangyan Tribe, Occidental Mindoro Philippines

Nutritionally adequate and safe complementary feeding starting from the age of 6 months up to 59 months is one of the effective intervention to reduce infant and child morbidity and malnutrition. This study aims to determine the nutritional status of children ages 6-59 months and their caregiver’s infant and young child feeding (IYCF) practices of the Buhid community in Rizal, Occidental Mindoro. The design used in this study was a descriptive cross-sectional carried out between December 2016-February 2017. A survey questionnaire was utilized as an instrument in this study. It includes an anthropometric survey of 6-59 months old and infant and young child feeding practices using WHO and UNICEF IYCF indicators. Vaccination, vitamin A supplementation and deworming coverage were also measured. Findings revealed a prevalence of global acute malnutrition (GAM) at a critical level. There is a low but significant prevalence of stunting and underweight among children. There is a good infant and young feeding practice in the community except for the minimum acceptable diet during complementary feeding. Lastly, there is low BCG and measles vaccination coverage in the community that could be a threat to the impending disease outbreak

Feeding behavior and food preference of Penaeus monodon Fabricius with scrap tilapia

The time of day during which P. monodon feeds at different depth levels in earthen ponds, and its preference for three types of tilapia feeds (dry, fresh and fermented) were determined. It was observed that P. monodon concentrated at the bottom beds during the day and along the periphery of dikes during night-time, with a slight tendency to swim and feed towards the surface as darkness increased. P. monodon showed special preference for dried tilapia compared to fresh and fermented tilapia. P. monodon also showed adaptability to the platform method of feeding, especially during night-time

Survival, growth and production of Penaeus monodon at different stocking densities in earthen ponds with flow-through system and supplementary feeding

The survival, growth and production of Penaeus monodon in earthen ponds were observed. A significant effect of stocking density on the survival rate of prawns was observed. The final average weight obtained varied inversly with the stocking density and the production varied directly with stocking density and survival rates. The maintenance of a clear water environment is recommended as a preventive measure against Vorticella attack

A simple and efficient numerical scheme to integrate non-local potentials

As nuclear wave functions have to obey the Pauli principle, potentials issued from reaction theory or Hartree-Fock formalism using finite-range interactions contain a non-local part. Written in coordinate space representation, the Schrodinger equation becomes integro-differential, which is difficult to solve, contrary to the case of local potentials, where it is an ordinary differential equation. A simple and powerful method has been proposed several years ago, with the trivially equivalent potential method, where non-local potential is replaced by an equivalent local potential, which is state-dependent and has to be determined iteratively. Its main disadvantage, however, is the appearance of divergences in potentials if the wave functions have nodes, which is generally the case. We will show that divergences can be removed by a slight modification of the trivially equivalent potential method, leading to a very simple, stable and precise numerical technique to deal with non-local potentials. Examples will be provided with the calculation of the Hartree-Fock potential and associated wave functions of 16O using the finite-range N3LO realistic interaction.Comment: 8 pages, 2 figures, submitted to Eur. Phys. J.

Lima, una ciudad policéntrica. Un análisis a partir de la localización del empleo

El objetivo de este artículo es el estudio de la conformación de varios centros en Lima Metropolitana (Perú), a la luz del modelo policéntrico. Nos hemos aproximado empíricamente a este proceso a través de la localización espacial de la fuerza laboral, como indicador de la concentración económica en el espacio, debido esto a la escasez de información empírica. Hemos usado datos de empleo georeferenciados a nivel de zonas censales del Censo Económico de 2008 y una combinación de metodologías que nos permitió estimar funciones de densidad.Se identificó diez centros y se les clasificó según su nivel de aglomeración y consolidación de actividades económicas. Los resultados confirman la hipótesis del carácter policéntrico de Lima

Pequeños vertebrados en la dieta del oso andino (Tremarctos ornatus Cuvier, 1825) en el norte del Perú

There have been numerous studies about Spectacled bear´s diet, however little is known about the small vertebrates it consumes. This study present nine vertebrate species (seven rodent and two birds) as preys of the Spectacled bear, based on the analysis of six feces collected from two locations Upa (Amazonas) and Lagunas Arreviatadas (Cajamarca) in northern Peru. Six of these records were new food items and a new family Caviidae. Vertebrates were found only in the Upa location. Additionally a sampling of small non flying mammals was conducted in there. Our results suggest that the Spectacled bear would be a generalist species. It prefers plants, however if it finds vertebrates in the environment, it could feed on them.Se han realizado numerosos estudios acerca de la dieta del oso andino, sin embargo poco se conoce sobre los pequeños vertebrados que consume. El presente trabajo da a conocer nueve especies de vertebrados (siete roedores y dos aves) como presas del oso andino, por medio del análisis de seis fecas provenientes de dos localidades Upa (Amazonas) y Lagunas Arreviatadas (Cajamarca) en el norte de Perú. Seis de estos registros son nuevos ítems alimenticios y una nueva familia Caviidae. Tan solo en la localidad de Upa se encontraron restos de vertebrados. Adicionalmente los pequeños mamíferos no voladores fueron muestreados en esa localidad. Nuestros resultados sugieren que el oso andino sería una especie generalista, si bien puede tener preferencias en la ingesta de plantas, en el caso de los vertebrados pareciera consumirlos según los encuentra en el ambiente

Cell-free gene expression dynamics in synthetic cell populations

The ability to build synthetic cellular populations from the bottom-up provides the groundwork to realize minimal living tissues comprising single cells which can communicate and bridge scales into multicellular systems. Engineered systems made of synthetic micron-sized compartments and integrated reaction networks coupled with mathematical modeling can facilitate the design and construction of complex and multiscale chemical systems from the bottom-up. Toward this goal, we generated populations of monodisperse liposomes encapsulating cell-free expression systems (CFESs) using double-emulsion microfluidics and quantified transcription and translation dynamics within individual synthetic cells of the population using a fluorescent Broccoli RNA aptamer and mCherry protein reporter. CFE dynamics in bulk reactions were used to test different coarse-grained resource-limited gene expression models using model selection to obtain transcription and translation rate parameters by likelihood-based parameter estimation. The selected model was then applied to quantify cell-free gene expression dynamics in populations of synthetic cells. In combination, our experimental and theoretical approaches provide a statistically robust analysis of CFE dynamics in bulk and monodisperse synthetic cell populations. We demonstrate that compartmentalization of CFESs leads to different transcription and translation rates compared to bulk CFE and show that this is due to the semipermeable lipid membrane that allows the exchange of materials between the synthetic cells and the external environment