2,652 research outputs found
EL SART: AUDITORÍAS DEL IESS PARA RIESGOS DEL TRABAJO
At present, management systems are the real development of efficiency, efficacy and effectivity standards applied to Organizational Development. Quality, Environment, Harmlessness, Security and Health among others, have been standardized in order to become homogeneous and flexible in the process of Systems integration. In Ecuador, Ecuadorian Social Security Institute (IESS) has fulfilled its objective, which was set forth approximately ten years ago: “to stop being an entity of recommendation and start to be an auditor organization of technical and legal fulfillments in matters of Work Risks Prevention for enterprises subject to IESS system. SART is currently a legal mandatory provision in Security and Health for enterprises throughout the country.Los Sistemas de Gestión son en la actualidad el desarrollo de los estándares de eficiencia, eficacia y efectividad aplicados al Desarrollo Organizacional. Calidad, Ambiente, Inocuidad, Seguridad y Salud entre otros, se han estandarizado con la finalidad de ser homogéneos y flexibles en la integración de los Sistemas. En Ecuador, el Instituto Ecuatoriano de Seguridad Social ha cumplido su objetivo planteado hace aproximadamente una década: dejar de ser un ente de recomendación y pasar a ser un organismo auditor de los cumplimientos técnico legal en materia de Prevención de Riesgos Laborales para las empresas sujetas al régimen del IESS. El SART, es ahora, un cumplimiento legal obligatorio en Seguridad y Salud para las empresas a nivel nacional
ERP and Economic Influence on the Development of Business
The use of software in business has become very significant, thanks to this business have access to a progressive technological development, as a result you get great benefits in optimizing processes and information. This research work emphasizes on the ERP and its economic influence in business, an unknown subject for many people. The realization of this research will help understand how it has contributed ERP largely to the development of enterprises, through the creation of systems that are responsible for optimizing most processes within companies to obtain a gradual enterprise-level development. Through documentary research it has been able to gather information from scientific papers, journals, academic papers, among others, which will help to better understand the problem to find a solution. Of enterprises or industries. The result of this research shows that ERP applied in companies have largely improved the process optimization and cost reduction and improved management practices efficiency, therefore a constant business development is produced
(1E,2E)-1,2-Bis(2,2-diphenylhydrazin-1-ylidene)ethane
In the crystal structure of the title compound, C26H22N4, the molecule is located on an inversion centre and shows an E configuration with respect to each C=N bond. The dihedral angle between the phenyl rings in the diphenylhydrazone group is 83.69 (11)°. These two rings make dihedral angles of 30.53 (15) and 84.53 (16)° with the central N—N=C—C=N—N dihydrazonoethane plane. Intermolecular C—H⋯π interactions are observed
Catalogue of exoplanets accessible in reflected starlight to the Nancy Grace Roman Space Telescope. A population study and prospects for phase-curve measurements
Reflected starlight measurements will open a new path in the characterization
of directly imaged exoplanets. However, we still lack a population study of
known targets amenable to this technique. Here, we investigate which of the
about 4300 exoplanets confirmed to date are accessible to the Roman Space
Telescope's coronagraph (CGI) in reflected starlight at reference wavelengths
=575, 730 and 825 nm. We carry out a population study and also address
the prospects for phase-curve measurements. We used the NASA Exoplanet Archive
as a reference for planet and star properties, and explored the impact of their
uncertainties on the exoplanet's detectability by applying statistical
arguments. We define a planet as Roman-accessible on the basis of the
instrument inner and outer working angles and its minimum planet-to-star
constrast (IWA, OWA, ). We adopt for these technical specifications
three plausible configurations labeled as pessimistic, intermediate and
optimistic. Our key outputs for each exoplanet are its probability of being
Roman-accessible (), the range of observable phase angles, the
evolution of its equilibrium temperature, the number of days per orbit that it
is accessible and its transit probability. In the optimistic scenario, we find
26 Roman-accessible exoplanets with >25% and host stars brighter
than =7 mag. This population is biased towards planets more massive than
Jupiter but also includes the super-Earths tau Cet e and f which orbit near
their star's habitable zone. A total of 13 planets are part of multiplanet
systems, 3 of them with known transiting companions, offering opportunities for
contemporaneous characterization. The intermediate and pessimistic scenarios
yield 10 and 3 Roman-accessible exoplanets, respectively. We find that
inclination estimates (e.g. with astrometry) are key for refining the
detectability prospects.Comment: Accepted for publication in A&A. 34 pages, 12 Tables, 24 Figure
Extended Main Sequence Turnoffs in Open Clusters as Seen by Gaia: I. NGC 2818 and the Role of Stellar Rotation
We present an analysis of the relatively low mass (~M), ~Myr, Galactic open cluster, NGC~2818, using Gaia DR2 results combined with VLT/FLAMES spectroscopy. Using Gaia DR2 proper motions and parallax measurements we are able to select a clean sample of cluster members. This cluster displays a clear extended main sequence turn-off (eMSTO), a phenomenon previously studied mainly in young and intermediate age massive clusters in the Magellanic clouds. The main sequence of NGC~2818 is extremely narrow, with a width of magnitudes (G G), suggesting very low levels of differential extinction. Using VLT/FLAMES spectroscopy of 60 cluster members to measure the rotational velocity of the stars (Vsini) we find that stars on the red side of the eMSTO have high Vsini (~km/s) while stars on the blue side have low Vsini (~km/s), in agreement with model predictions. The cluster also follows the previously discovered trend between the age of the cluster and the extent of the eMSTO. We conclude that stellar rotation is the likely cause of the eMSTO phenomenon
Chitosans of different molecular weight enhance potato (Solanum tuberosum L.) yield in a field trial
Physico-chemical features of chitosan affect its biological activity on plants. In this work, the influence of chitosan molecular mass in potato (Solanum tuberosum L.) yields was investigated. By using chitosan polymers of high (CH-1) and low (CH-2) molecular weight and a hydrolysed chitosan derivative (CHH), two experiments were performed under field conditions to determine the effect of these polymers on yields of two potato varieties, ‘Call White’ and ‘Santana’. For this purpose, the foliar spray of low doses of the derivatives at three cultivation moments was performed and several yield variables were determined at crop harvest. All three chitosan compounds increased the performance variables determined respect to the control, depending on the variable, the dose employed and the mass of the derivative evaluated. In most variables determined, the two lowest doses (200 and 325 mg/ha) provoked the highest increments above control. Chitosans also affected distribution of mass per tuber size, particularly; in ‘Santana’ variety the two lowest doses enhanced the commercial tuber sizes. Among the polymers, CH-1 caused the greatest increases in performance, while, compared to the polymer, CHH provoked higher yields. In conclusion, foliar application at low doses of high molecular weight and hydrolysed chitosan enhanced potato yield between 15-30%
Vitamin B12, folate, and homocysteine in metabolic syndrome: a systematic review and meta-analysis
Background & aims: Metabolic syndrome (MetS) is associated with life-threatening conditions. Several studies have reported an association of vitamin B12, folic acid, or homocysteine (Hcy) levels with MetS. This systematic review and meta-analysis assessed the association of vitamin B12, folic acid, and Hcy levels with MetS. Methods: PubMed, Scopus, Embase, Ovid/Medline, and Web of Science were searched up to February 13, 2023. Cross-sectional, case-control, or cohort studies were included. A random-effects model was performed using the DerSimonian and Laird method to estimate the between-study variance. Effect measures were expressed as odds ratios (OR) with their corresponding 95% confidence intervals (95% CI). Between-study heterogeneity was evaluated using Cochran’s Q test and the I2 statistic. Results: Sixty-six articles (n = 87,988 patients) were included. Higher vitamin B12 levels were inversely associated with MetS (OR = 0.87; 95% CI: 0.81–0.93; p < 0.01; I2 = 90%). Higher Hcy levels were associated with MetS (OR = 1.19; 95% CI: 1.14–1.24; p < 0.01; I2 = 90%). Folate levels were not associated with MetS (OR = 0.83; 95% CI: 0.66–1.03; p = 0.09; I2 = 90%). Conclusion: Higher vitamin B12 levels were inversely associated with MetS, whereas higher Hcy levels were associated with MetS. Studies assessing the pathways underlying this association are requiredRevisión por pare
ANÁLISIS COMPARATIVO DE LA CALIDAD DEL AGUA EN EL TIEMPO ENTRE EL BARRILITO DE POLIETILENO DE 22 LITROS FRENTE AL BIDÓN DE POLICARBONATO DE 20 LITROS
En este artículo, se compara el estado final del agua de mesa después de estar almacenada durante los días promedio de consumo en un barril de policarbonato y un barril de polietileno con tecnología bag in box, se realiza el análisis del agua utilizando la técnica NMP por tubos múltiples para determinar la presencia de microorganismos, tales como Heterótrofos, escherinchia, coliformes, pseudomonas, colífagos, organismos de vida libre, copepodos. Los análisis demostraron que el envase de barril de polietileno garantiza la inocuidad del agua durante el tiempo de consumo y el bidón de policarbonato por sus características no garantiza la calidad microbiana del agua almacenada en su interio
Temperature‐sensitive biochemical O‐fractionation and humidity‐dependent attenuation factor are needed to predict δ O of cellulose from leaf water in a grassland ecosystem
We explore here our mechanistic understanding of the environmental and physiological processes that determine the oxygen isotope composition of leaf cellulose (δO) in a drought‐prone, temperate grassland ecosystem.
A new allocation‐and‐growth model was designed and added to an O‐enabled soil–vegetation–atmosphere transfer model (MuSICA) to predict seasonal (April–October) and multi‐annual (2007–2012) variation of δO and O‐enrichment of leaf cellulose (ΔO) based on the Barbour–Farquhar model.
Modelled δO agreed best with observations when integrated over c. 400 growing‐degree‐days, similar to the average leaf lifespan observed at the site. Over the integration time, air temperature ranged from 7 to 22°C and midday relative humidity from 47 to 73%. Model agreement with observations of δO (R = 0.57) and ΔO (R = 0.74), and their negative relationship with canopy conductance, was improved significantly when both the biochemical O‐fractionation between water and substrate for cellulose synthesis (ε, range 26–30‰) was temperature‐sensitive, as previously reported for aquatic plants and heterotrophically grown wheat seedlings, and the proportion of oxygen in cellulose reflecting leaf water O‐enrichment (1 – pp, range 0.23–0.63) was dependent on air relative humidity, as observed in independent controlled experiments with grasses.
Understanding physiological information in δO requires quantitative knowledge of climatic effects on pp and ε
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