Search results for "ILTER"

Evaluation of a pilot-scale biotrickling filter as a VOC control technology for the plastic coating sector

2011

Abstract The performance and feasibility of a biotrickling filter (BTF) pilot unit for the treatment of exhaust gases from two robotic spray paint booths at a plastic coating facility were investigated. The volatile organic compound (VOC) concentrations in the emissions of the exhaust gases from the paint booths were relatively stable, although the VOC composition depended on the applied solvent-paint formulation in the booths. The pilot plant was operated for one year at empty bed residence times (EBRTs) ranging from 30 to 93 s. The performance of the system was affected by the solvent-paint formulations. An EBRT between 30 and 40 s was enough to meet legal requirements for products contai…

Effect of the color of the intraocular lens on optical and visual quality

2014

Purpose: To analyze the optical quality of intraocular lenses (IOL) with an orange (PC440Y) and a yellow (SN60AT) filter, and correlate these results with the visual quality of patients with these implants. Setting: Fisabio Oftalmología Médica, Valencia, Spain. Design: Randomized prospective study. Materials and Methods: The IOL optical quality was determined using the modulation transfer function (MTF) and the spectral transmission. The visual quality of 87 eyes with cataract (51 with orange filter and 36 with yellow filter) was determined by best corrected visual acuity (BCVA) and contrast sensitivity function (CSF) under photopic and mesopic conditions. To analyze the results, we use a S…

Pelēki tonētu lēcu ietekme uz redzes funkcijām

2017

Darbs ir uzrakstīts andļu valodā uz 27 lapaspusēm, tajā ir 12 attēli, 2 tabulas un 36 litteratūras avoti. Darba mērķis bija novērtēt, kā samazināta apgaismojuma apstākļi ietekmē redzes funkcijas gados jaunākiem un vecākiem dalībniekiem. Gados jauniem (21 – 35 gadi) un vecākiem (60 – 75 gadi) dalībniekiem tika mērīts augsta un zema kontrasta redzes asums. Mērījumi tika veikti ar un bez pelēki tonētām lēcām, kuru gaismas caurlaidība bija 50 %. Rezultāti parādīja, ka lielāks redzes asuma samazinājums, samazinoties optotipu kontrastam, bija novērojams gados vecākiem dalībniekiem. Skatoties caur tonētajām lēcām, standarta kontrasta redzes asums vairāk samazinājās gados vecākiem nekā jaunākiem da…

Influenza dei filtri di convoluzione sulla misurazione dei valori di attenuazione della placca durante angiografia coronarica mediante TC multistrato

2005

Methylophilaceae and Hyphomicrobium as target taxonomic groups in monitoring the function of methanol-fed denitrification biofilters in municipal was…

2017

Abstract Molecular monitoring of bacterial communities can explain and predict the stability of bioprocesses in varying physicochemical conditions. To study methanol-fed denitrification biofilters of municipal wastewater treatment plants, bacterial communities of two full-scale biofilters were compared through fingerprinting and sequencing of the 16S rRNA genes. Additionally, 16S rRNA gene fingerprinting was used for 10-week temporal monitoring of the bacterial community in one of the biofilters. Combining the data with previous study results, the family Methylophilaceae and genus Hyphomicrobium were determined as suitable target groups for monitoring. An increase in the relative abundance …

Microbial communities in full-scale woodchip bioreactors treating aquaculture effluents.

2021

Woodchip bioreactors are being successfully applied to remove nitrate from commercial land-based recirculating aquaculture system (RAS) effluents. In order to understand and optimize the overall function of these bioreactors, knowledge on the microbial communities, especially on the microbes with potential for production or mitigation of harmful substances (e.g. hydrogen sulfide; H2S) is needed. In this study, we quantified and characterized bacterial and fungal communities, including potential H2S producers and consumers, using qPCR and high throughput sequencing of 16S rRNA gene. We took water samples from bioreactors and their inlet and outlet, and sampled biofilms growing on woodchips a…

Calculate Pulse from Touch Error Free PPG Signal with 2ndOrder Butterworth Filter

2021

With the ongoing heart problems of the population worldwide, the medical requirements of the people are expected to increase. Electrocardiogram (ECG) is one of the proven to capture the heart response signal to assess the electrical and muscular functions of the heart. The ECG setup is expensive and needs proper training, and of course, it is not instant. For fast, accurate heart parameter monitoring, scientists pay attention to the photoplethysmogram signal (PPG), based on the light intensity of a particular wavelength. Android smartphone with a good quality camera has come to ordinary people's reach and has become one of the most necessary and rugged devices for today and future generatio…

Optimization of Delayed-State Kalman-Filter-based Algorithm via Differential Evolution for Sensorless Control of Induction Motors

2010

This paper proposes the employment of the differential evolution (DE) to offline optimize the covariance matrices of a new reduced delayed-state Kalman-filter (DSKF)-based algorithm which estimates the stator-flux linkage components, in the stationary reference frame, to realize sensorless control of induction motors (IMs). The DSKF-based algorithm uses the derivatives of the stator-flux components as mathematical model and the stator-voltage equations as observation model so that only a vector of four variables has to be offline optimized. Numerical results, carried out using a low-speed training test, show that the proposed DE-based approach is very promising and clearly outperforms a cla…

Filters design and characterization for LAD instrument onboard eXTP

2022

Copyright 2022 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited. The LAD (Large Area Detector) instrument, onboard the Sino-European mission eXTP (enhanced X-ray Timing and Polarimetry), will perform single-photon, high-resolution timing and energy measurements, in the energy range 2–30 keV, with a large collecting area. Its silicon drift detectors need shielding from NIR/Vis/UV light by astrophysical sources and the bright Ea…

Digital Device Usage Time and Ocular Symptoms during COVID-19 Pandemic

2021

Bakalaura darbs ir uzrakstīts angļu valodā uz 25 lappusēm. Tas satur 10 attēlus, 6 tabulas un 22 atsauces uz literatūras avotiem. Šī pētījuma galvenais mērķis bija novērtēt kā digitālo ierīču lietošanas izmaiņas ikdienā pirms Covid-19 pandēmijas un pandēmijas laikā Itālijā ietekmē acu nogurumu. Digitālo ierīču ietekme uz acīm tika novērtēta, apkopojot pētījuma dalībnieku atbildes uz anketas jautājumiem. Digitālo ierīču izmantošana mūsdienās ir plaši izplatīta, tās ir jāizmanto, bet ievērojot nepieciešamos piesardzības pasākumus, lai neradītu traucējumus redzes un psihiskajā sistēmās.