Comportamiento sismorresistente para edificaciones de concreto armado en la urbanización La Alborada Tumbes 2023

La realización de esta investigación tuvo lugar en Tumbes, en la universidad Cesar Vallejo se determinó el Comportamiento sismorresistente para edificaciones de concreto armado en la urbanización La Alborada Tumbes, para la realización del mismo se usó un diseño no experimental - descriptivo, con muestreo de tipo no probabilístico basado en normativa técnica E-030,E-060,obteniendo datos a través de técnicas de observación, datos que fueron analizados por inferencia estadística y a través de ETABS, el problema radica en las estructuras de Tumbes, mismas que son realizadas de modo empírico y mayormente sin estudio previo a pesar de que este distrito está situado en una zona sísmica de nivel 4 ocasionando colapsos y riegos a las vidas humanas, En el análisis de respuesta sísmica, se determinó un desplazamiento lateral máximo entre pisos de 0.0049 en dirección de X y de 0.0016 en dirección de Y, estando por debajo del límite de desplazamiento de 0.007, conforme a lo estipulado en la normativa E.030, el sistema adoptado fue tipo Dual Tipo II para ambas direcciones X e Y, basado en una combinación de placas y pórticos que soportan las fuerzas sísmicas, En la etapa final, se procedió al diseño de los componentes estructurales

Responsiveness comparison between a lift-type and drag-type rotor in waves

Our recent progress on development of a vertical-axis unidirectional rotary wave energy converter (WEC) is discussed in this work. The WEC features a vertical-axis rotor that preforms unidirectional rotation in waves. The vertical axis arrangement makes the WEC respond well to waves from any direction with no realignment needs. And, the unidirectional behavior of the rotor promises no wave frequency discrimination, which is in comparison to reciprocating WECs that employ the resonant principle and are very frequency-specific. In our earlier proof-of-concept studies, we have successfully demonstrated two types of rotor designs: a lift type employing hydrofoil blades and a drag type using cup blades. In the present work, the two rotor types were further explored experimentally by employing more rotor configurations and blade shapes. The focus was on revealing the rotor responsiveness in simulated waves under a freewheeling condition. The experimental results were compared between a lift-type and drag-type rotor. The comparison provided in-depth understanding on common features of the two rotor types and major differences between them. The yielded research findings will directly guide the development of a prototype vertical-axis unidirectional WEC

Diseño y construcción de muro de contención en neumático usado en el municipio de La Mesa.

Diseñar y construir un muro de contención con neumáticos usados, para la comunidad del Barrio Rincón Santo (La Mesa – Cundinamarca), con el fin de contener el talud que afecta el acceso a algunas viviendas del barrio.El desarrollo de este trabajo se centra en dos partes, la primer parte es primordialmente en brindar solución al desprendimiento de material terreo en taludes que se encuentran situados en el barrio RINCON SANTO del municipio de la mesa- Cundinamarca, realizando la construcción de un muro de contención en llanta , esta técnica de estabilización y contención de taludes ya ha sido herramienta de estudio en otras tesis, donde se demuestra que es posible llevar a cabo la construcción de muro flexibles permitiendo seguridad, facilidad en el proceso constructivo y manejo de bajo presupuesto, poniéndolo en paralelo con las construcciones convencionales de muros en concreto reforzado. La construcción consta de un muro de gravedad en llanta reciclada, con la ayuda de la comunidad afectada; para la construcción se realizan ensayos de suelos y se toma como base el método experimental de otras tesis, donde previamente se realizaron las pruebas de empuje lateral y características de las propiedades mecánicas de las llantas. Por otro lado, la segunda parte se basa en la contribución con el medio ambiente, dando a conocer que es una buena solución a la mitigación de grandes depósitos de llantas que se encuentran en su mayoría de casos acumuladas, contribuyendo a una problemática de salud pública, siendo una alta fuente de cultivos de mosquitos y otros agentes propagadores de enfermedades.The development of this work focuses on two parts, the first part is primarily to provide solution to the detachment of earth material in slopes that are located in the neighborhood SANTA RINCON of the municipality of Lamesa-Cundinamarca, making the construction of a retaining wall In a recycled tire, this slope stabilization and containment technique has already been a study tool in other theses, where it is demonstrated that it is possible to carry out the construction of this type of wall allowing safety, ease in the construction process and low management. budget, putting it in parallel with conventional constructions of walls in reinforced concrete. The construction consists of a gravity wall in a recycled tire, with the help of the affected community; For the construction, soil tests are carried out and the experimental method of other theses is taken as a basis, where the lateral thrust tests and characteristics of the mechanical properties of the tires were previously carried out. On the other hand, the second part is based on the contribution to the environment, making known that it is a good solution to the mitigation of large tire deposits that are mostly accumulated cases, contributing to a public health problem, being a high source of mosquito cultures and other disease-spreading agents

Phylogenetic Relationships among the Colobine Monkeys Revisited: New Insights from Analyses of Complete mt Genomes and 44 Nuclear Non-Coding Markers

Background: Phylogenetic relationships among Asian and African colobine genera have been disputed and are not yet well established. In the present study, we revisit the contentious relationships within the Asian and African Colobinae by analyzing 44 nuclear non-coding genes (.23 kb) and mitochondrial (mt) genome sequences from 14 colobine and 4 noncolobine primates. Principal Findings: The combined nuclear gene and the mt genome as well as the combined nuclear and mt gene analyses yielded different phylogenetic relationships among colobine genera with the exception of a monophyletic ‘odd-nosed’ group consisting of Rhinopithecus, Pygathrix and Nasalis, and a monophyletic African group consisting of Colobus and Piliocolobus. The combined nuclear data analyses supported a sister-grouping between Semnopithecus and Trachypithecus, and between Presbytis and the odd-nosed monkey group, as well as a sister-taxon association of Pygathrix and Rhinopithecus within the odd-nosed monkey group. In contrast, mt genome data analyses revealed that Semnopithecus diverged earliest among the Asian colobines and that the odd-nosed monkey group is sister to a Presbytis and Trachypithecus clade, as well as a close association of Pygathrix with Nasalis. The relationships among these genera inferred from the analyses of combined nuclear and mt genes, however, varied with the tree-building methods used. Another remarkable finding of the present study is that all of our analyses rejected the recently proposed African colobine paraphyl

TRY plant trait database – enhanced coverage and open access

Plant traits - the morphological, anatomical, physiological, biochemical and phenological characteristics of plants - determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait‐based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best species coverage is achieved for categorical traits - almost complete coverage for ‘plant growth form’. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait–environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives

Robust estimation of bacterial cell count from optical density

Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data

Lithium Use Following a Severe Suicide Attempt: A Case Report

Introduction: Psychotic disorders confer a significant risk of suicide attempt and completion.1,2 Lithium is one of the two medications that have demonstrated anti-suicidal benefits.3 We present a case of a patient with psychosis status post severe suicide attempt treated with Lithium, showing significant improvement of symptoms and complete resolution of suicidal ideation. Case Description: Mr S. is a 33 year old Caucasian male, recently homeless with PMH of unspecified psychosis and HIV, who attempted suicide by jumping in front of a vehicle, “because a green alien was telling him to kill himself”. Upon arrival, a CT cervical spine showed left occipital condyle fracture. Patient was placed under a Baker Act, admitted to the ICU, and psychiatry was consulted. Once medically cleared, patient was admitted to inpatient psychiatry. Upon psychiatric evaluation, the patient appeared disheveled, depressed, and exhibited psychomotor retardation. He reported command auditory hallucinations and paranoid delusions along with intermittent cannabis and nicotine use. Patient was started on Lithium 300 mg TID and Haldol 5 mg BID. Over the course of hospitalization, patient showed progressive and marked improvement of mood and decreased auditory hallucinations. Prior to discharge, patient reported complete resolution of suicidal ideation. Discussion: Studies indicate that Lithium has anti-suicide properties in mood disorders. 4,5 This case presents Lithium as an optimal treatment for suicide prevention in a high-risk patient with psychosis and mood symptoms. This case highlights the need for longitudinal studies investigating the use of Lithium for suicide prevention in other psychiatric populations

Responsiveness comparison between a lift-type and drag-type rotor in waves

Our recent progress on development of a vertical-axis unidirectional rotary wave energy converter (WEC) is discussed in this work. The WEC features a vertical-axis rotor that preforms unidirectional rotation in waves. The vertical axis arrangement makes the WEC respond well to waves from any direction with no realignment needs. And, the unidirectional behavior of the rotor promises no wave-frequency discrimination, which is in comparison to reciprocating WECs that employ the resonant principle and are very frequency-specific. In our earlier proof-of-concept studies, we have successfully demonstrated two types of rotor designs: a lift type employing hydrofoil blades and a drag type using cup blades. In the present work, the two rotor types were further explored experimentally by employing more rotor configurations and blade shapes. The focus was on revealing the rotor responsiveness in simulated waves under a freewheeling condition. The experimental results were compared between a lift-type and drag-type rotor. The comparison provided in-depth understanding on common features of the two rotor types and major differences between them. The yielded research findings will directly guide the development of a prototype vertical-axis unidirectional WEC

Responsiveness comparison between a lift-type and drag-type rotor in waves

Our recent progress on development of a vertical-axis unidirectional rotary wave energy converter (WEC) is discussed in this work. The WEC features a vertical-axis rotor that preforms unidirectional rotation in waves. The vertical axis arrangement makes the WEC respond well to waves from any direction with no realignment needs. And, the unidirectional behavior of the rotor promises no wave-frequency discrimination, which is in comparison to reciprocating WECs that employ the resonant principle and are very frequency-specific. In our earlier proof-of-concept studies, we have successfully demonstrated two types of rotor designs: a lift type employing hydrofoil blades and a drag type using cup blades. In the present work, the two rotor types were further explored experimentally by employing more rotor configurations and blade shapes. The focus was on revealing the rotor responsiveness in simulated waves under a freewheeling condition. The experimental results were compared between a lift-type and drag-type rotor. The comparison provided in-depth understanding on common features of the two rotor types and major differences between them. The yielded research findings will directly guide the development of a prototype vertical-axis unidirectional WEC