Head Loss
Mostrando 13-24 de 253 artigos, teses e dissertações.
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13. Head loss in laser-perforated thin-walled polyethylene pipes for irrigation
RESUMO Para reduzir custos fixos e operacionais em sistemas de irrigação pressurizados são produzidos tubos de polietileno com pequena espessura de parede, com orifícios de descarga perfurados a laser, que operam a baixas pressões (até 100 kPa). A caracterização hidráulica desses materiais é essencial para o dimensionamento dos sistemas de irrigaç
Rev. bras. eng. agríc. ambient.. Publicado em: 06/05/2019
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14. Antiphospholipid syndrome and neurofibromatosis type I: a coincidence or new association?
RESUMO | Inúmeros estudos têm relatado anomalias vasculares estruturais e isquemia associada com à neurofibromatose tipo 1 que, acredita-se, resultam da disfunção da neurofibromina, a proteína tipo 1 da neurofibromatose. Casos documentados de síndrome antifosfolípide associada que atendem aos critérios diagnósticos aceitos são excepcionalmente rar
Arq. Bras. Oftalmol.. Publicado em: 2019-03
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15. Does obesity affect intraocular pressure during laparoscopic surgery?
RESUMO Objetivo: A obesidade é aceita como um fator de risco para a perda visual pós-operatória devido a possíveis elevações perioperatórias da pressão intraocular. Este estudo investigou se as alterações na pressão intraocular diferem de acordo com o índice de massa corporal dos pacientes submetidos à colecistectomia laparoscópica. Métodos:
Arq. Bras. Oftalmol.. Publicado em: 21/02/2019
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16. Effect of fluoride application during radiotherapy on enamel demineralization
Abstract Radiation-related caries are one the most undesired reactions manifested during or after head and neck radiotherapy. Fluoride application is an important strategy to reduce demineralization and enhance remineralizaton. Objective: To evaluate the effect of the topical application of fluoride during irradiation on dental enamel demineralization. Mat
J. Appl. Oral Sci.. Publicado em: 10/12/2018
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17. Analysis of a tuned liquid column damper in non-linear structures subjected to seismic excitations
Abstract The behavior of the tuned liquid column damper (TLCD) is analyzed in the control of non-linear structures subjected to random seismic excitations. The structure is modeled as a system of one degree of freedom with incursion in the non-linear range. The Bouc-Wen hysteretic model is used to model the non-linear behavior of the structure. A stationary
Lat. Am. j. solids struct.. Publicado em: 19/07/2018
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18. Intratympanic Gentamicin for Intractable Ménière’s Disease - A Review and Analysis of Audiovestibular Impact
Abstract Introduction Intratympanic gentamicin regulates the symptoms in most patients with incapacitating Ménière’s disease. The treatment protocols have changed over the years from medical labyrinthectomy to preservation of vestibular function. Objectives This study aims to review the audiovestibular response related to the effect of the drug in co
Int. Arch. Otorhinolaryngol.. Publicado em: 2018-06
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19. ESTIMATION OF THE KINETIC HEAD COEFFICIENT (k) BASED ON THE GEOMETRIC CHARACTERISTICS OF EMITTER PIPES
ABSTRACT: The objective of this study was to determine the variability of the head loss as a function of the emitter geometry as well as to develop a relation between local head loss caused by the emitter insertion and geometric characteristics of the emitter pipe, using index of obstruction for dripper pipes with non-coaxial emitters. For this, an experimen
Eng. Agríc.. Publicado em: 2017-12
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20. Investigation of Dosimetry in Four Human Head Models for Planar Monopole Antenna with a Coupling Feed for LTE/WWAN/WLAN Internal Mobile Phone
Abstract The objective of the present study is to evaluate the Specific Absorption Rate (SAR) within the human head model exposed to the radiation of planar monopole antenna with T-shaped coupling feed and an inductive shorting strip. The presented design has a compact structure, a planar configuration and occupying a small size of 36×20mm2. Two wide bands
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
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21. BIOCHEMICAL ANALYSIS AND BONE REMODELING IN RESPONSE TO OOPHORECTOMY AND AQUATIC TRAINING
ABSTRACT Objective: To investigate whether swimming could prevent bone loss and could be indicated to assist in treatment of osteoporosis. Methods: Female rats were divided into 4 groups (n=6), two of them were oophorectomized. Animals from two groups, one oophorectomized and another not oophorectomized, underwent aquatic training for eight weeks. After tr
Acta ortop. bras.. Publicado em: 2016-10
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22. Effect of Complementary Split Ring Resonator Structure on PIFA Antenna
Abstract This paper proposes a new design of Planar Inverted-F Antenna with complementary split ring resonators (CSRRs). The operating frequency of this antenna is 2.425 GHz for Wireless Local Area Network (WLAN) application. The method is to incorporate a single CSRR cell and a periodic array CSRRs on the radiating patch. We studied the effect of this metho
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-09
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23. Asociación entre el patrón postural cefálico y la inteligibilidad articulatoria del habla
ABSTRACT Purpose: the objective of this study was to establish an associative factor that connects the morphology of the craniocervical system with the articulatory speech intelligibility level in young subjects. Methods: a cross-sectional study which considered a sample of 42 university students from a universe of 140, both male and female, without morbid
Rev. CEFAC. Publicado em: 2016-08
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24. Geometry and head loss in Venturi injectors through computational fluid dynamics
ABSTRACT To determine the influence of geometry on the hydrodynamic behavior of Venturi injectors, using computational fluid dynamics techniques, we studied, at the Universitat Politècnica de València, Valencia, Spain, the geometric parameters that exert the most influence on head losses: the relationship between throat diameter and nozzle (β), nozzle ang
Eng. Agríc.. Publicado em: 2016-06