LSSVM APLICADA EN LA ESTIMACIÓN DE LA RESISTENCIA DE ROTOR EN MOTOR DE INDUCCIÓN JAULA DE ARDILLA

En este artículo se estima la resistencia de rotor presente en la dinámica de un motor de inducción Jaula de Ardilla aplicando LSSVM en regresión. El problema es que la resistencia de rotor es difícil de medir por lo que se requiere estimarla. Además, de ser afectada por el incremento en la temperatura, conllevando a que la constante de tiempo del rotor cambie y afecte los parámetros del motor. Se plantea un modelo del motor, en Simulink de Matlab, del cual se extrae la data, se preprocesa y se aplica el algoritmo LSSVM en regresión con Kernel no lineal RBF y la optimización de gamma se hace por validación cruzada. La medición del desempeño del modelo se utilizó la raíz cuadrada del error medio de predicción. Obteniendo buenos resultados

Evaluation of Three Deworming Methods and their Long-Term Effect on the Weight of Buffaloes Raised in Silvopastoral Systems

Purpose of the Study: The present work aimed to evaluate the effect of three deworming methods on body weight gains in buffaloes raised in silvopastoral systems (SPS). Methods: Thirty buffaloes were divided into three groups (ten per group) as follows: 1) Albendazole 10 g + 1.3 g of cobalt sulfate at one week of age and 14 days later; 2) Albendazole 10 g + 1.3 g of cobalt sulfate at one week of age and 14 days later, then at 6 months and 14 days later; 3) Ivermectin 1 g at 30 days of age and then at six months of age. Birth, weaning (9 months), and final (18 months) weight were registered, and daily weight gains were calculated. The McMaster technique was used to evaluate the presence of parasites. Results: The overall prevalence of parasites in the animals evaluated was 93.33%. The most common parasites were: Strongylus sp., Neoascaris sp., Moniezia sp., and Eimeria sp. Before the application of the dewormers, initial values in G1, G2, and G3 were 360, 350, and 210 hpg/opg; after the application of the treatments, 60, 25, and 20 hpg/opg were obtained, respectively. Buffaloes in G2 showed significantly (P=0.046) high final weights (415.10±23.76 kg) compared to G1 (354.80±46.71 kg) but showed no difference with G3 (374.80±43.60k). Conclusion: It is concluded that albendazole at 10 g and a repeat at six months of age can be used in buffalo breeding in SPS, which could help to implement regenerative livestock programs, decreasing the use of Ivermectin

Evaluation of the Predictability and Accuracy of Orthognathic Surgery in the Era of Virtual Surgical Planning

Virtual surgical planning allows orthognathic surgeons to design a surgical plan preoperatively and establish a personalized surgical protocol. This study aims to validate the predictability and accuracy of orthognathic surgery through a comparison of the three-dimensional (3D) models of the virtual planning and postoperative CBCT using free software (3D Slicer) on 40 patients who underwent bimaxillary orthognathic surgery. The distances of point A, point B, pogonion (Pog), and the first upper and lower molars, both in each axis (x, y, and z) and in the 3D space, were analyzed. The median of the distances in the mediolateral direction was the lowest, while the highest differences were found at point A and Pog in the anteroposterior direction (0.83 mm and 0.78 mm, respectively). Vertical differences were higher in the maxilla than in the mandible. In conclusion, we found that orthognathic bimaxillary surgery using virtual surgical planning was more accurate when positioning the bone segments in the mediolateral direction, using the information provided by the splint, as well as when positioning the mandible compared to the maxilla.Fac. de MedicinaTRUEpu

APLICACIÓN MÓVIL PARA LA ADQUISICIÓN DE LENGUAJE EN NIÑOS CON TRASTORNO DE HABLA

ResumenEn el estado de Chiapas, México el 9.4% de la población con discapacidad presenta limitaciones en el habla. Esta limitación ocupa el cuarto lugar de discapacidad. Uno de los servicios ofrecidos por el gobierno para este grupo son las sesiones de terapia de lenguaje orientada a niños con discapacidad del habla y aprendizaje del lenguaje. Esto mediante un tratamiento de rehabilitación a base de ejercicios fono-articuladores. Cada niño necesita de ejercicios diferentes para el desarrollo de su lenguaje oral, con el que podrá expresar sus necesidades, pensamientos, sentimientos y emociones. El presente trabajo apoya al proceso de adquisición del habla por medio de un software especializado para dispositivos móviles con sistema operativo Android, que integra actividades de terapia para el desarrollo de lenguaje en niños de nivel preescolar con trastornos de habla. Las actividades son presentadas usando el lenguaje coloquial propio de la región. Esto permite al niño adquirir el habla de una forma agradable en un entorno familiar. Esta aplicación ofrece sesiones especializadas que incluyen actividades usando el lenguaje y los juegos propios de la región que promueven la adquisición del habla en niños de 3 a 6 años de edad con trastorno de habla en el estado de Chiapas, México.Palabras Clave: dispositivos móviles, software educativo, trastorno de habla. AbstractIn Mexico in the state of Chiapas 9.4% of the disabled population has limitation in speech. This limitation is the fourth of disability presented in this state. One of the services offered by the government for this group are oriented therapy sessions for children with speech and language learning disabilities. This by a rehabilitative treatment based on speech articulation. Every child needs different exercises for the development of oral language, with which you can express their needs, thoughts, feelings and emotions. This work supports the process of acquiring speech by specialized software. This is designed for mobile devices with Android operating system and integrates therapy activities for the acquisition of language in preschool children with speech disorders. The activities are presented using the own colloquial language of the state of Chiapas. This allows the child to acquire speech in a pleasant way in a familiar environment. This application provides specialized sessions including activities using language and own game in the region to promote the acquisition of speech in children 3 to 6 years old with speech disorder in the state of Chiapas, Mexico.Keywords: mobile devices, educational software, speech disorder

Valor de conservación en bosques de comunidades indígenas: Un estudio de caso en la Amazonia peruana, San Jacinto y Puerto Arturo

The study analyzes the conservation value of forests assigned to indigenous populations of the Peruvian Amazon: San Jacinto and Puerto Arturo in Madre de Dios, communities with different realities in terms of conservation and forest management. Two scenarios prevail here: The San Jacinto indigenous community with 7 033,98 ha of forest, is characterized by disorder and the development of activities that put the community at risk (gold mining), while Puerto Arturo with 3 731 ha is a community committed to the management and conservation of its resources. By means of the Contingent Valuation Method (CVM) through the dichotomous logit model we try to define the willingness of the individuals to accept compensation (WAC) on proposed prices of a hypothetical scenario. The results show that the average annual WAC to implement the environmental program was S/ 20,46 (USD 6,30) and S/ 14,84 (USD 4,57) ha/year respectively. The difference of the WAC is deductible and is product of the levels of impact suffered by both communities due to deforestation, mainly gold mining. Also, these values have an indirect relationship between the income of the indigenous population and potential dangers that affect community forests, while education shows a very significant direct relationship in the WAC. Finally, the forest is important by itself for the indigenous population, and they express a positive disposition for its improvement.El estudio analizó el valor de conservación del bosque que le asignan los pobladores indígenas de la Amazonia peruana: San Jacinto y Puerto Arturo en Madre de Dios, comunidades que contrastan realidades distintas en cuanto a conservación y manejo de sus bosques. Para ello se plantea dos escenarios: la comunidad indígena de San Jacinto con 7 033,98 ha de bosque, que expresa el desorden y el desarrollo de actividades que ponen en riesgo a la comunidad (minería de oro), mientras que Puerto Arturo con 3 731 ha es una comunidad comprometida con el manejo y conservación de sus recursos. Mediante el método de valoración contingente (MVC) a través del modelo logit dicotómico se intenta definir la disposición de los individuos a aceptar una compensación (DAC) sobre precios propuestos de un escenario hipotético. Los resultados muestran que la DAC promedio anual para implementar el programa ambiental fue de S/ 20,46 (USD 6,30) y S/ 14,84 (USD 4,57) ha/año respectivamente. La diferencia de la DAC es deducible y es producto de los niveles de impactos que sufren ambas comunidades por la deforestación, principalmente por la minería de oro. Asimismo, estos valores presentan una relación indirecta con los ingresos del poblador indígena y peligros potenciales que afectan al bosque de la comunidad, mientras que la educación muestra una relación directa muy significativa en la DAC. Finalmente, el bosque es importante por sí mismo para el poblador indígena, y manifiestan una disposición positiva para su mejora

Metsäkoneurakoitsijoiden mielipide työssäoppijoiden työelämätaidoista

Tämä tutkimus on tehty selvittämään Tampereen ammattiopiston metsäkonealan koulutusta, jota annetaan Kurun metsäoppilaitoksessa. Tutkimuksessa pyrittiin selvittämään työssäoppimisen kautta sitä, miten metsäkonealan työnantajat arvioivat koulutuksen antamat työelämävalmiudet ja mitä puutteita vastaajat mahdollisesti kokevat ja näkevät oppilaiden koulutuksessa. Aineisto tutkimukseen kerättiin kyselylomakkeen avulla, joka lähetettiin vastaajille postitse keväällä 2009. Tavoitteena oli, että saadun tiedon perusteella opetuksen niihin osiin, joissa koettiin puutteita, voitaisiin keskittää enemmän huomiota ja miettiä, mitä voitaisiin tehdä, jotta opiskelijoille ja työelämälle koituisi mahdollisimman paljon hyötyä osaamisen kasvamisena. Tutkimustulosten mukaan työnantajat olivat suurimmaksi osaksi tyytyväisiä oppilaiden taitoihin heidän saapuessaan työssäoppimisjaksolle. Työnantajien mielestä suurimmat puutteet opiskelijoilla olivat työskentelyssä tarvittavissa taidoissa, vastuussa sekä asenteessa työhön. Antamalla vastuullisia tehtäviä oppilaalle jo kouluaikana voitaisiin hänet saada ottamaan enemmän vastuuta omista tekemisistään. Jos halutaan palvella työlämää paremmin, tulisi tämän tutkimuksen perusteella saada oppilaalle opetettua riittävä taitotaso jo ennen työssäoppimisjaksolle siirtymistä. Tämä asettaa erityisiä vaatimuksia opetushenkilöstön osaamiselle niin ammattitaidollisesti kuin pedagogisestikin.This research has been made to show how effective Tampere Vocational school's forest machinery education given at Kuru Institute of Forestry is. The research was aimed at how the employers estimate the working life skills of forest machine drivers gained during in their education and what shortcomings the employers experience and see within the education system. The material was collected with the help of questionnaires sent to defendants by post in the summer of 2009. The aim based on information obtained, was to concentrate on areas where it was felt the shortcomings were and to consider what could be done so that students and the working life would benefit the most from increasing knowledge. According to the research results, the employers were mostly satisfied with the skills of the students starting their work placements, however; they felt that the biggest shortcomings were within skills needed whilst working i.e.: responsibility and attitude towards work. By giving tasks involving responsibility to students as early as possible in their education, they could be made to take more responsibility for their own actions. If the wish is to serve the working life better, the students, according to this study, should be taught adequate skills level before starting the work placement. This puts particular demands on the skills of the teaching personnel within both craftsmanship and pedagogical skills. Keywords: forest machinery driver education, work readiness, working skill

Modeling and Simulation of Temperature and Relative Humidity Inside a Growth Chamber

Modeling and simulation of internal variables such as temperature and relative humidity are relevant for designing future climate control systems. In this paper, a mathematical model is proposed to predict the internal variables temperature and relative humidity (RH) of a growth chamber (GCH). Both variables are incorporated in a set of first-order differential equations, considering an energy-mass balance. The results of the model are compared and assessed in terms of the coefficients of determination (R2) and the root mean squared error (RMSE). The R2 and RMSE computed were R2 = 0.96, R2 = 0.94, RMSE = 0.98 C, and RMSE = 1.08 C, respectively, for the temperature during two consecutive weeks; and R2 = 0.83, R2 = 0.81, RMSE = 5.45%RH, and RMSE = 5.48%RH, respectively, for the relative humidity during the same period. Thanks to the passive systems used to control internal conditions, the growth chamber gives average differences between inside and outside of +0.34 C for temperature, and +15.7%RH for humidity without any climate control system. Operating, the GCH proposed in this paper produces 3.5 kg of wet hydroponic green forage (HGF) for each kilogram of seed (corn or barley) harvested on average

Development of a molecular platform for the detection and quantification of Newcastle vaccine virus

El estudio tuvo por objetivo desarrollar una plataforma molecular para la cuantificación del virus de la enfermedad de Newcastle (NDV) a partir de un sistema de cultivo en huevos embrionados SPF. Primero se evaluaron cuatro pares de cebadores que amplifican diferentes regiones del genoma viral de NDV que codifican para la proteína de nucleocápside (NP), proteína matriz (M), proteína fusión (F) y la ARN polimerasa ARN dependiente (L), con la finalidad de seleccionar el más conservado a partir del cual se desarrolló una plataforma molecular basada en la transcripción reversa - reacción en cadena de polimerasa convencional (RT-PCRc) en dos pasos para la detección del NDV. Posteriormente, esta fue llevada a transcripción reversa - reacción en cadena de polimerasa en tiempo real (RT-qPCR) para la cuantificación de NDV producido a partir de un sistema de huevos embrionados. Mediante estas técnicas se determinó que los cebadores para el gen M fueron adecuados según los criterios de optimización para el desarrollo de ambos métodos. Mediante ensayos de sensibilidad se demostró que la RT-qPCR (116 copias genómicas/μl) era 10 veces más sensible que el RT-PCRc. Los cebadores fueron específicos pues no hubo amplificados en los controles negativos ni en otros patógenos aviares (virus de la laringotraqueitis infecciosa, metapneumovirus aviar, virus de la bronquitis infecciosa, Avibacterium paragallinarum, Gallibacterium anatis y Ornithobacterium rhinotracheale). Debido su sensibilidad y especificidad, se propone esta plataforma para la cuantificación de NDV vacunal cuando es producido a partir de un sistema de huevos embrionados, como una alternativa frente a métodos convencionales de titulación como hemaglutinación, ensayo en placa, TCDI50 y DIEP50.The objective of the study was to develop a molecular platform for the quantification of Newcastle disease virus (NDV) from a culture system in embryonated SPF eggs. First, four pairs of primers were evaluated that amplify different regions of the NDV viral genome that code for: nucleocapsid protein (NP), protein matrix (M), fusion protein (F) and RNA-dependent RNA polymerase (L) to select the most conserved one from which a molecular platform based on reverse transcription was developed - conventional polymerase chain reaction (RT-PCRc) in two steps for the detection of NDV. Subsequently, it was taken to reverse transcription - real-time polymerase chain reaction (RT-qPCR) for the quantification of NDV produced from a system of embryonated eggs. Through these techniques, it was determined that the primers for the M gene were adequate according to the optimization criteria for the development of both methods. Sensitivity tests showed that the RT-qPCR (116 genomic copies/μl) was 10 times more sensitive than the RT-PCRc. The primers proved to be specific since there were no amplifications in the negative controls or in other avian pathogens (infectious laryngotracheitis virus, avian metapneumovirus, infectious bronchitis virus, Avibacterium paragallinarum, Gallibacterium anatis and Ornithobacterium rhinotracheale). Due to its sensitivity and specificity, this platform is proposed for the quantification of NDV vaccine when it is produced from an embryonated egg system, as an alternative to conventional titration methods such as hemagglutination, plaque assay, TCDI50 and DIEP50

Effect of the anodal transcranial direct current electrical stimulation on cognition of medical residents with acute sleep deprivation

Background: Medical residents must sustain acute sleep deprivation, which can lead to nonfatal and fatal consequences in hospitals due to cognitive decline. Anodal transcranial direct current stimulation (a-tDCS) is a safe noninvasive neuromodulation technique that can induce depolarization of neurons. Previous studies in pilots have shown benefits against fatigue increasing wakefulness and cognitive performance. However, the effects of a-tDCS on cognition in acute sleep deprived healthcare workers remains unknown. Purpose: To evaluate cognitive changes in sleep deprived medical residents after one session of a-tDCS. Methods: Open clinical test-re-test study including 13 medical residents with acute sleep deprivation. Subjects received 1 session of bifrontal a-tDCS (2mAx20min), anodal over the left dorsolateral prefrontal region. Pre-and-post treatment subjects were tested with Beck anxiety inventory, Beck depression and HVLT tests, Rey´s and Taylor´s figures, Trail Making A/B, Stroop, Aleatory Digit retention test (WAIS), Digits and symbols and MoCA tests. Post-intervention was added the Executive functions and Frontal Lobes Neuropsychological Battery (BANFE2) test and changing the Taylor figure for Reyfigure. Results: Twelve medical residents were analyzed; 8 men and 4 women, 29.5 (+/-2.2) years mean age. All had a mean of 21.6 (+/-1.3) hours of sleep deprivation. There were no serious adverse events. We found statistically significant difference in Rey´s/Taylor´s figures (p=0.002), Trail Making Test (p=0.005), WAIS IV symbols (p=0.003), Word Stroop (p=0.021). BANFE-2 showed that the main affected area was the orbito-medial prefrontal region. Conclusion: a-tDCS appears safe and improves working memory, attention, response time and distractors elimination in acute sleep deprived medical residents

Pulmonary vascular remodeling and prognosis in patients evaluated for heart transplantation: insights from the OCTOPUS-CHF study

[Abstract] Objective: In patients with advanced heart failure, the intravascular optical coherence tomography (OCT) of subsegmental pulmonary artery measurements is correlated with right heart catheterization parameters. Our aim was to study the prognostic value of pulmonary OCT, right heart catheterization data, and the echocardiographic estimation of pulmonary pressure in patients studied for elective heart transplants. Methods: This research is an observational, prospective, multicenter study involving 90 adults with a one-year follow-up. Results: A total of 10 patients (11.1%) died due to worsening heart failure before heart transplantation, 50 underwent a heart transplant (55.6%), and 9 died in the first year after the transplant. The patients with and without events (mortality or heart failure-induced hospitalization) had similar data regarding echocardiography, right heart catheterization, and pulmonary OCT (with a median estimated pulmonary artery systolic pressure of 42.0 mmHg, interquartile range (IQR) of 30.3-50.0 vs. 47.0 mmHg, IQR 34.6-59.5 and p = 0.79, median pulmonary vascular resistance of 2.2 Wood units, IQR 1.3-3.7 vs. 2.0 Wood units, IQR 1.4-3.2 and p = 0.99, and a median pulmonary artery wall thickness of 0.2 ± 0.5 mm vs. 0.2 ± 0.6 mm and p = 0.87). Conclusion: Pulmonary vascular remodeling (evaluated with echocardiography, right heart catheterization, and pulmonary OCT) was not associated with prognosis in a selected sample of adults evaluated for elective heart transplants. Pulmonary OCT is safe and feasible for the evaluation of these patients.Instituto de Salud Carlos III; PI18/00254European Regional Development Fund; CB16/11/0050