Search results for " floor"
showing 10 items of 139 documents
Hand verification for flexural strength of existing R.C. floors subject to degradation phenomena
2015
Abstract In the present paper, a simplified model for hand verification of the flexural and shear strength of existing corroded T beams cast in place of lightened R.C. orthotropic slabs forming floors is presented and discussed. Diffused and pitting corrosion on steel bars, compressive concrete strength degradation and concrete bond strength degradation are included in the model. The original contribution of the paper is evaluation of the flexural and shear strength considering both the cases of strain compatibility and absence of compatibility and considering the main parameters governing the corrosion process. An arch-resistant model for the calculus of the flexural and shear strength of …
Microwave-free magnetometry with nitrogen-vacancy centers in diamond
2016
We use magnetic-field-dependent features in the photoluminescence of negatively charged nitrogen-vacancy centers to measure magnetic fields without the use of microwaves. In particular, we present a magnetometer based on the level anti-crossing in the triplet ground state at 102.4 mT with a demonstrated noise floor of 6 nT/$\sqrt{\text{Hz}}$, limited by the intensity noise of the laser and the performance of the background-field power supply. The technique presented here can be useful in applications where the sensor is placed closed to conductive materials, e.g. magnetic induction tomography or magnetic field mapping, and in remote-sensing applications since principally no electrical acces…
Tailored treatments in internal rectal prolapse
2020
Background: Internal rectal prolapse is commonly reported in patients suffering pelvic floor disorders, such as obstructive defecation and incontince. Unfortunately, its treatment not always offers a symptoms resolution. Material and methods: To investigate the correct management and its influence in symptoms resolution, we investigated patients submitted to hierarchic therapeutic options from conservative to surgical treatments. An evaluation of the appropriate treatment tailored on the entity of the prolapse was proposed. Results: We investigated 84 patients [64 F, 20 M (median age 52)]. In 44 a symptoms resolution was obtained with medical therapy. To 40 patients biofeedback rehabilitati…
Mesh complications following prolapse surgery: management and outcome.
2011
Abstract Objective This is a description of complications following prolapse surgery with the use of alloplastic materials, the management and outcome. Study design 54 women have been referred to Mainz, urogynecology referral center due to complications following mesh-augmented prolapse surgery. Results The complaints who lead to the admission are expressed by the new terminology and standardized classification for complications arising directly from the insertion of prostheses and grafts in female pelvic floor surgery [1] . Pain (66.7%), mesh erosion (55.6%) and vaginal discharge (48.1%) were the most frequent complaints. Revision was performed after a median time of 27.2 months post mesh …
Noise estimation from digital step-model signal
2013
International audience; This paper addresses the noise estimation in the digital domain and proposes a noise estimator based on the step signal model. It is efficient for any distribution of noise because it does not rely only on the smallest amplitudes in the signal or image. The proposed approach uses polarized/directional derivatives and a nonlinear combination of these derivatives to estimate the noise distribution (e.g., Gaussian, Poisson, speckle, etc.). The moments of this measured distribution can be computed and are also calculated theoretically on the basis of noise distribution models. The 1D performances are detailed, and as our work is mostly dedicated to image processing, a 2D…
Indoor floors from Gien (8th-10th c. AD). Buildings materials, use of space and formation processes
2017
International audience; The refurbishing of the National museum of hunting at Gien (France) offers the opportunity to uncover the early castral occupation (8th-10th c. AD). High status habitats have been explored by archaeological and geoarchaeological methods, including micromorphology. The very well preservation of indoor floors allows to get data on building materials and the use of space, such as domestic housing, craft working and cereal processing.
Noise characterization of analog to digital converters for amplitude and phase noise measurements
2017
International audience; Improvements on electronic technology in recent years have allowed the application of digital techniques in phase noise metrology where low noise and high accuracy are required, yielding flexibility in systems implementation and setup. This results in measurement systems with extended capabilities, additional functionalities and ease of use. In most digital schemes the Analog to Digital Converters (ADCs) set the ultimate performance of the system, therefore the proper selection of this component is a critical issue. Currently, the information available in literature describes in depth the ADC features only at frequency offsets far from the carrier. However, the perfo…
The Effect of Medium-Intensity Electromagnetic Stimulation on Pelvic Floor Muscle Activity in a Young Woman—A Case Report
2021
Aims In recent years, devices for deep electromagnetic stimulation have been implemented in clinical practice. These devices generate pulses with a frequency of 1 to 50 Hz and magnetic induction of up to 2.5 T. Due to the possibility of producing or an effective deep-penetrating mechanical vibration, electromagnetic stimulation is increasingly used in the physiotherapy of urogynecological disorders. This study aimed to analyse of the effect of deep electromagnetic stimulation on the bioelectrical activity of pelvic floor muscles in a young woman. Case report The case of a 24-year-old woman with no diagnosed stress urinary incontinence is presented. The subject underwent electromagnetic stim…
Effects of soil fauna on leaching of nitrogen and phosphorus from experimental systems simulating coniferous forest floor
1990
Long-term experiments (97–98 weeks) were carried out in macrocosm systems simulating the complexity of coniferous forest soil. The macrocosms were partially sterilized by freezing, thawing and drying, then re-inoculated with microbes alone or microbes + soil fauna. Removable microcosms containing birch litter, spruce litter, or humus were inserted into the substrate humus in the macrocosms. Two experiments used organic matter only, and in the third there was mineral soil below the humus. The macrocosms were incubated in climate chambers that simulated both summer and winter conditions. At 4- to 6-week intervals the substrates were irrigated for analyses of pH, total N, NH 4 + −N, NO 3 − −N,…
Evaluation of the soil fauna impact on decomposition in a simulated coniferous forest soil
1990
Long-term experiments (ca. 2 years) were carried out in laboratory systems that simulated the complexity of a coniferous forest floor. The test materials were partially sterilized by freezing and thawing, and reinoculated with (1) microbes alone or (2) microbes with fauna. Removable microcosms containing birch litter, spruce litter, or humus were inserted into a humus substrate. Two experiments used organic matter only, and another included a layer of mineral soil below the humus. Both were incubated in climate chambers that simulated both summer and winter conditions. The evolution of CO2 was measured at regular intervals. In order to determine the C content of the leachates, the macrocosm…