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Journal articles on the topic 'Disc filters'

Author: Grafiati

Published: 5 June 2025

Last updated: 16 July 2025

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1

Ghaffari, Masoud, and Jaber Soltani. "Evaluation and Comparison of Performance in the Disc Filter with Sand Filters of Filtration Equipment in Micro Irrigation Systems." Modern Applied Science 10, no. 8 (2016): 264. http://dx.doi.org/10.5539/mas.v10n8p264.

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At the present time, the need to evacuate organic and green growth of algae contaminants in micro irrigation system is expanding increasingly. The worldwide populace is expanding and as a result of this, the world may encounter extraordinary fresh water shortage. Our water assets are constrained and, subsequently, water treatment and reusing strategies are the main choices for getting crisp and fresh water in the coming decades. This study examines the rate of the impact of green growth of algae existing in micro irrigation system performance on the disc filters and sand tanks in the examinati

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Lee, Sang-ik, Jin-Yong Choi, and Won Choi. "Effect of Groove Shape on Head Loss and Filtration Performance of Disc Filters." Water 13, no. 12 (2021): 1683. http://dx.doi.org/10.3390/w13121683.

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To analyze the effect of a groove cross-sectional shape on disc filters, a head loss analysis and filtration performance test were conducted using disc filters with different groove shapes (semi-elliptical- and trapezoidal-shaped grooves). Furthermore, the groove shapes were analyzed using field emission scanning electron microscopy and the relationship between flow rate and head loss was derived from the head loss test. Even if the filters were designed with the same mesh standard, the sectional areas of the grooves were different depending on the shape. Therefore, the head loss was compared

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Dalri, Alexandre B., Gilmar O. Santos, Geffson de F. Dantas, Rogério T. de Faria, José R. Zanini, and Luiz F. Palaretti. "Performance of drippers in two filtering systems using sewage treatment effluent." Revista Brasileira de Engenharia Agrícola e Ambiental 21, no. 6 (2017): 363–68. http://dx.doi.org/10.1590/1807-1929/agriambi.v21n6p363-368.

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ABSTRACT The objective of this study was to evaluate the performance of three models of drippers using treated sewage effluent, pure and diluted, and two types of filters, screen and disc. The treated sewage effluent used in the experiment was collected from the city’s treatment plant. The experiment included 12 lateral lines with three types of emitters to apply pure (100%) and diluted (50%) effluent filtered by screen and disc filters. The combination of those factors set the treatments: T1 (50% effluent diluted in fresh water filtered by a screen filter); T2 (50% effluent diluted in fresh w

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Wilén, B. M., M. Cimbritz, T. Pettersson, and A. Mattsson. "Large scale tertiary filtration – results and experiences from the discfilter plant at the Rya WWTP in Sweden." Water Practice and Technology 11, no. 3 (2016): 547–55. http://dx.doi.org/10.2166/wpt.2016.063.

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This paper summarizes the results and experiences from the full-scale discfilter plant at the Rya WWTP. In 2010 the WWTP was extended with post-denitrification and a discfilter plant for tertiary filtration of the effluent in order to meet the new discharge limits of 10 mg total nitrogen and 0.3 mg/l of total phosphorus. The disc filters receive effluent from both the moving bed biofilm reactor (MBBR) and the secondary settlers. The disc filters are equipped with filter cloths with 15 µm pore openings. The concentration of suspended solids was generally kept below 5 mg/l and total phosphorus w

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Airoldi, Rogerio Pereira da Silva, José Euclides Stipp Paterniani, Tulio Assunção Pires Ribeiro, and Marcelo Jacomini Moreira da Silva. "COMPARAÇÃO ENTRE ELEMENTOS FILTRANTES DE MANTA SINTÉTICA NÃO TECIDA E DE DISCO NO TRATAMENTO DE ÁGUA PARA IRRIGAÇÃO." IRRIGA 8, no. 3 (2003): 218–33. http://dx.doi.org/10.15809/irriga.2003v8n3p218-233.

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COMPARAÇÃO ENTRE ELEMENTOS FILTRANTES DE MANTA SINTÉTICA NÃO TECIDA E DE DISCO NO TRATAMENTO DE ÁGUA PARA IRRIGAÇÃO Rogério Pereira da Silva Airoldi José Euclides Stipp PaternianiTúlio Assunção Pires Ribeiro Marcelo Jacomini Moreira da SilvaDepartamento de Água e Solo, Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Campinas, SP. CP 6011, CEP: 13083-970, E-mail:remiro@agr.unicamp.br. 1 RESUMO A pesquisa realizada propôs uma investigação experimental para a avaliação do desempenho dos meios filtrantes disco (130 mm) e manta sintética não tecida na filtração da água utilizad

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Zeng, Jiefeng, Peiling Yang, Weijie Liu, and Xudong Xiang. "Influence of Fractal Disc Filter Flow Channel Parameters on Filtration Performance." Applied Sciences 14, no. 17 (2024): 7505. http://dx.doi.org/10.3390/app14177505.

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The research and development of a new disc filter is a key link in intelligent irrigation systems, the core of efficient and water-saving irrigation development, and also an important joint effort to ensure a clean water source in micro-irrigation systems. In this paper, the independent research and development of the fractal flow passage disc filter was taken as the research object, and the disc filter numerical simulation cell (FLUENT) and artificial intelligence technology (Back Propagation Neural Network) were combined to optimize the filter flow channel parameters, including the tilt angl

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Biswas, Jagonnath, Tanbin Ahmed, Sazzad M. S. Imran, and Abul Kalam Azad. "Effective Noise Reduction Filters for Precise Temperature Measurement Using Brillouin Distributed Optical Fiber Sensors." Dhaka University Journal of Applied Science and Engineering 8, no. 1 (2024): 42–50. http://dx.doi.org/10.3329/dujase.v8i1.72992.

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This study explores the effectiveness of various noise reduction filters in accurately measuring temperature distributions over a 38.2 km single-mode fiber (SMF). Brillouin optical time-domain analysis (BOTDA) sensor is utilized to gather Brillouin gain spectra (BGSs), which are denoised using bilateral filter (BF), guided filter (GF), adaptive Wiener filter (AWF), non-local means filter (NLMF), average filter (AF) and disc filter (DF). The temperature distributions over the SMF are then determined by applying least-squares curve fitting (LSCF). The study assesses the efficacy of noise reducti

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Conder, J. R., and T. P. Liew. "Fine mist filtration by wet filters—III: Sintered disc filters." Journal of Aerosol Science 20, no. 1 (1989): 59–66. http://dx.doi.org/10.1016/0021-8502(89)90031-1.

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Zhu, Zi Xin, Jun Zhong Zheng, and Dong Chen. "Using Lubricating Oil Filter Debris Analysis to Monitor Abnormal Wear of Aero-Engine." Applied Mechanics and Materials 86 (August 2011): 821–24. http://dx.doi.org/10.4028/www.scientific.net/amm.86.821.

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With the installation of finer oil filters in the lubrication system of aero-engine, the traditional wear analysis techniques such as Rotating Disc Electrode Atomic Emission Spectrometry Analysis (RDE-AES) become less efficient at detecting abnormal wear failure caused by large debris. These filters capture large debris containing large amounts of tribological information about the operation of an aero-engine. Removal and analysis of the filter debris has proved to be an effective tool for aero-engine health management by determining wear modes and observing failure progression providing long

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Hsu, Ming Wei, Man Long Her, Wen Ko, and Yu Lin Wang. "Design and Analysis of Dual-Mode Double-Ring Resonator for Dual-Band Bandpass Filter Applications." Applied Mechanics and Materials 321-324 (June 2013): 376–82. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.376.

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In this paper, two types of miniaturized dual-mode bandpass filters (BPF), a single-ring (SR) resonator, and a double-ring (DR) resonator are developed. By applying the capacitive-coupling technique to a dual-mode ring filter, a technique is proposed to miniaturize the dual-mode double-ring filter. An adjustable dual-band bandpass filter is achieved by developing a ring resonator where the two modes are capacitively coupled. Control of the filter center frequency is determined by the diameter of the ring and by the rings annular width. Filter coupling amount can also be adjusted by disturbance

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Ewemoje, T. A., and F. A. Kondum. "Development of Mathematical Equations for Computing Head Loss across Spun and String-Wound Filters for Drip Irrigation Systems." European Journal of Advances in Engineering and Technology 7, no. 2 (2020): 23–29. https://doi.org/10.5281/zenodo.10658103.

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<strong>ABSTRACT</strong> Filtration is needed in drip irrigation systems to prevent emitter clogging, but the incorporation of filters causes a significant pressure drop that eventually reduces the efficiency of the system. Equations available to describe head loss due to filters used in micro irrigation systems were developed mainly for screen, disc and sand filters, not for the most recent spun and string-wound filters. A new mathematical model to describe head loss across spun and string-wound filters has been developed using dimensional analysis. Buckingham π-theorem was used to derive

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Liu, Chunye, Rui Wang, Wene Wang, Xiaotao Hu, Wanying Wu, and Fulai Liu. "Different Irrigation Pressure and Filter on Emitter Clogging in Drip Phosphate Fertigation Systems." Water 14, no. 6 (2022): 853. http://dx.doi.org/10.3390/w14060853.

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Irrigation pressures and filters have a significant influence on emitter clogging in drip fertigation systems. Exploring the anti-clogging performance of emitters at different irrigation pressures (80, 90, 100 kPa; 40, 50, 60 kPa) and filters (the disc filter with an aperture of 125 μm, the screen filter with an aperture of 125μm, and the screen filter with an aperture of 200 μm) can provide suitable guidance for the design and operation of drip fertigation systems. The average relative discharge (Dra), the Christiansen uniformity coefficient (CU), and the differential pressure (DP) were analy

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Ribeiro, Tulio Assunção Pires, José Euclides Stipp Paterniani, Rogério Pereira da Silva Airoldi, and Marcelo Jacomini Moreira da Silva. "O EFEITO DA QUALIDADE DA ÁGUA NO ENTUPIMENTO DE EMISSORES E NO DESEMPENHO DE FILTROS UTILIZADOS NA IRRIGAÇÃO POR GOTEJAMENTO." IRRIGA 9, no. 2 (2004): 136–49. http://dx.doi.org/10.15809/irriga.2004v9n2p136-149.

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O EFEITO DA QUALIDADE DA ÁGUA NO ENTUPIMENTO DE EMISSORES E NO DESEMPENHO DE FILTROS UTILIZADOS NA IRRIGAÇÃO POR GOTEJAMENTO Túlio Assunção Pires Ribeiro; José Euclides Stipp Paterniani; Rogério Pereira da Silva Airoldi; Marcelo Jacomini Moreira da SilvaDepartamento de Água e Solo, Faculdade de Engenharia Agrícola, UNICAMP, Campinas, SP, tulior@agr.unicamp.br 1 RESUMO O presente trabalho teve como objetivo proceder a investigação experimental de uma fonte hídrica superficial, utilizada em um sistema de irrigação por gotejamento, bem como verificar sua influência na obstrução dos gotejadores e

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14

Fylypchuk, Viktor, Stanislav Induchny, Pete Pearce, Leonid Fylypchuk, and Serhii Martynov. "Application of expanded polystyrene filter for tertiary treatment of domestic waste effluent in the UK." Journal of Water and Land Development 35, no. 1 (2017): 41–47. http://dx.doi.org/10.1515/jwld-2017-0066.

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AbstractThe use of expanded polystyrene filters is a promising method for tertiary treatment of domestic waste effluent where biologically treated effluent is filtered through a layer of buoyant polystyrene beads. The advantage of such filters is in the absence of backwashing pumps, containers of clean washing water, while having low energy costs, high resistance of polystyrene to various chemical contaminants that may be in the effluent, easy automation of switching modes.The article describes the features of the design and principles of the expanded polystyrene filter operation with an upwar

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15

Savolainen, Mikko, Mikko Huhtanen, Antti Häkkinen, Bjarne Ekberg, Rolf Hindström, and Juha Kallas. "Development of testing procedure for ceramic disc filters." Minerals Engineering 24, no. 8 (2011): 876–85. http://dx.doi.org/10.1016/j.mineng.2011.03.023.

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Ribeiro, Túlio Assunção Pires, José Euclides Stipp Paterniani, Rogério Pereira da Silva Airoldi, and Marcelo Jacomini Moreira da Silva. "Performance of non woven synthetic fabric and disc filters for fertirrigation water treatment." Scientia Agricola 61, no. 2 (2004): 127–33. http://dx.doi.org/10.1590/s0103-90162004000200001.

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Obstruction of emitters caused by the presence of solid particles in the water raises the cost and maintenance of trickle irrigation systems, and might compromise their utilization. This research was performed through test fields, with the objective of evaluating the performance of a disc filter (130 microns) and a non woven synthetic fabric filter on the removal of physical, chemical and biological impurities from the irrigation water, which may cause emitter obstruction during fertirrigation processes. The evaluation criteria of the impurities present in the irrigation water, were based on s

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Ribeiro, Túlio Assunção Pires, José Euclides Stipp Paterniani, Rogério Pereira da Silva Airold, and Marcelo Jacomini Moreira da Silva. "Water quality and head loss in irrigation filters." Scientia Agricola 61, no. 6 (2004): 563–72. http://dx.doi.org/10.1590/s0103-90162004000600001.

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Among the irrigation systems used today, trickle irrigation is one of the most efficient methods. This research, conducted by means of field tests, had the objective of comparing head loss evolution on water filtration with a disc filter (130 mum) and a non-woven synthetic fabric filter used in a drip irrigation system. The test consisted of fertirrigation with organic fertilizer, and chemical treatment of the water with sodium hypochlorite. Physical, chemical, and biological parameters were analyzed, such as: pH, turbidity, suspended solids, dissolved solids, EC, hardness, Langelier index, to

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18

Gutierrez, Miguel. "Municipal tertiary treatment: Disc filters enhanced by pleated configuration." Filtration & Separation 46, no. 5 (2009): 22–24. http://dx.doi.org/10.1016/s0015-1882(09)70190-9.

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19

Charlton, Richard. "Do self-cleaning disc filters still hold their own?" Filtration & Separation 42, no. 4 (2005): 18–20. http://dx.doi.org/10.1016/s0015-1882(05)70513-9.

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20

Liu, Guangrong, Hua Jiang, Dongmei Liao, and Yingchun Deng. "Comparative experiments on the technological performance of disc filters." IOP Conference Series: Materials Science and Engineering 207 (June 2017): 012066. http://dx.doi.org/10.1088/1757-899x/207/1/012066.

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Hägg, Kristofer, Michael Cimbritz, and Kenneth Persson. "Combining Chemical Flocculation and Disc Filtration with Managed Aquifer Recharge." Water 10, no. 12 (2018): 1854. http://dx.doi.org/10.3390/w10121854.

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Natural organic matter (NOM) is a growing concern for artificial recharge plants. In the future, it is predicted that warmer climates and more precipitation will cause higher NOM production in lakes and more NOM transport to lakes. This, coupled with increasing drinking water demand due to the population increase, is pushing operators of water treatment plants (WTPs) to find new ways to treat water. In this study, the possibility of reducing the organic load in infiltration basins through a compact pre-treatment technique utilizing microsieves, or disc filters, instead of bulky sedimentation b

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Shelomentsev, Ivan G., and Ekaterina A. Gomzikova. "Prospects of analyzing of nanoparticles in the composition of aerosol by the method of electron microscopy." Hygiene and sanitation 102, no. 3 (2023): 259–64. http://dx.doi.org/10.47470/0016-9900-2023-102-3-259-264.

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Introduction. Control of distribution of aerosol particle by size in the workplace area is one of the important problems of hygiene. To assess health effect of aerosol particles in workers, it is necessary to improve existing and introduce new methods for analyzing the dispersion and chemical composition of aerosols, including their nanosized constituents. Materials and methods. Generated lead oxide nanoparticles with an average diameter of 26.2±12.6 nm were sampled on 47-mm nylon membrane disc filters with a pore size of 0.2 µm and 1.2 µm. The experimental device represented a cascade s

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Im, Hyeong-Seop, Kee-Baek Sim, and Tae-Yeon Seong. "Thermally stable AgCu alloy disc array for near infrared filters." Current Applied Physics 20, no. 12 (2020): 1321–27. http://dx.doi.org/10.1016/j.cap.2020.08.017.

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Galera-Rosillo, R., R. L. M. Corradi, and A. Mampaso. "A deep narrowband survey for planetary nebulae at the outskirts of M 33." Astronomy & Astrophysics 612 (April 2018): A35. http://dx.doi.org/10.1051/0004-6361/201731383.

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Context. Planetary nebulae (PNe) are excellent tracers of stellar populations with low surface brightness, and therefore provide a powerful method to detect and explore the rich system of substructures discovered around the main spiral galaxies of the local group. Aim. We searched the outskirts of the local group spiral galaxy M 33 (the Triangulum) for PNe to gain new insights into the extended stellar substructure on the northern side of the disc and to study the existence of a faint classical halo. Methods. The search is based on wide field imaging covering a 4.5 square degree area out to a

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Chi, Yanbing, Peiling Yang, Zixuan Ma, et al. "The Study on Internal Flow Characteristics of Disc Filter under Different Working Condition." Applied Sciences 11, no. 16 (2021): 7715. http://dx.doi.org/10.3390/app11167715.

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A disc filter (DF) is an important component in a micro irrigation system. However, it has a high head loss and low filtration efficiency, which can lead to the inoperability of micro irrigation systems. To improve the filtration ability and to decrease the pressure loss of the irrigation system, it is necessary to internalize the hydraulic characteristics of DFs. In this study, the filter bed of a DF was divided into three parts, i.e., upper, middle, and lower, which were wrapped with a transparent film. The wrapped part was completely blocked. The purpose was to analyze the hydraulic charact

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Marasco, A., F. Fraternali, L. Posti, M. Ijtsma, E. M. Di Teodoro, and T. Oosterloo. "The angular momentum of disc galaxies at z = 1." Astronomy & Astrophysics 621 (January 2019): L6. http://dx.doi.org/10.1051/0004-6361/201834456.

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We investigate the relation between stellar mass (M⋆) and specific stellar angular momentum (j⋆), or “Fall relation”, for a sample of 17 isolated, regularly rotating disc galaxies at z ∼ 1. All galaxies have rotation curves determined from Hα emission-line data; HST imaging in optical and infrared filters; and robust determinations of their stellar masses. We use HST images in f814w and f160w filters, roughly corresponding to rest-frames B and I bands, to extract surface-brightness profiles for our systems. We robustly bracket j⋆ by assuming that rotation curves beyond the outermost Hα rotatio

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Stickland, Anthony D., Lee R. White, and Peter J. Scales. "Models of rotary vacuum drum and disc filters for flocculated suspensions." AIChE Journal 57, no. 4 (2010): 951–61. http://dx.doi.org/10.1002/aic.12310.

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Junior, Ênio L., Moisés T. da Silva, and Thiago A. M. Euzébio. "Avoiding Buffer Tank Overflow in an Iron Ore Dewatering System with Integrated Control System." Sustainability 14, no. 15 (2022): 9347. http://dx.doi.org/10.3390/su14159347.

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High water usage is necessary while ore passes through the many stages of a mineral processing plant. However, a dewatering system filters the final ore pulp product to remove the water, which is reutilized in the previous processes. This step is fundamental to reducing the fresh new water consumption. Usually, several tanks, pumps, and filters form a dewatering system—any failure or shutdowns from those components disbalance the pulp flow. The waste of many tons of water and ore products for a tailing dam is the worst consequence of a mass disbalance in a dewatering system. This paper propose

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M. Maruthirao, V. Pavan Kumar, and N.V. Surya narayana. "Design and Fabrication of Multi-Disc Oil Skimmer." international journal of engineering technology and management sciences 6, no. 5 (2022): 864–74. http://dx.doi.org/10.46647/ijetms.2022.v06i05.134.

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During the past 40 years, there have been numerous major accidents of oil spill in various countries, mostly as results of ship collisions. There are several methods in handling oil spill accident, in which the most effective methods are using mechanical oil skimmer with disc plate. This will reduce water pollution and saves the aquatic life. Disc type oil skimmer is used to remove the floating oil from liquid medium. The oil is removed from the metal disc and belt through wiping blades. Here we use the skimming medium as Metal disc. The skimming medium runs over the surface of water in which

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Desai, Mehul J. "Intervertebral Disc Temperature Mapping During Disc Biacuplasty in the Human Cadaver." Pain Physician 2;18, no. 2;3 (2015): E217—E223. http://dx.doi.org/10.36076/ppj/2015.18.e217.

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Background: Intradiscal biacuplasty (IDB) is a novel heating therapy using cooled radiofrequency (RF), which may offer relief for discogenic pain. Effective neuroablation may be achieved intradiscally at higher lesion temperatures. The safety of intradiscal heating at elevated temperatures using cooled RF has never been reported. Objective: The purpose of this study is to map the intradiscal and peridiscal temperatures when IDB is performed at increased temperature using a modified lesion approach. The resulting temperature profiles are used to assess the safety and theoretical efficacy of thi

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Duran-Ros, M., J. Puig-Bargués, G. Arbat, J. Barragán, and F. Ramírez de Cartagena. "Performance and backwashing efficiency of disc and screen filters in microirrigation systems." Biosystems Engineering 103, no. 1 (2009): 35–42. http://dx.doi.org/10.1016/j.biosystemseng.2009.01.017.

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Meerman, J. J., and H. J. H. Brouwers. "Clean pressure drop of non-newtonian liquid flow across stacked-disc filters." Chemical Engineering Science 48, no. 23 (1993): 3983–91. http://dx.doi.org/10.1016/0009-2509(93)80377-3.

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Kosenkov, Ilia A., Alexandra Veledina, Andrei V. Berdyugin, et al. "Disc and wind in black hole X-ray binary MAXI J1820+070 observed through polarized light during its 2018 outburst." Monthly Notices of the Royal Astronomical Society: Letters 496, no. 1 (2020): L96—L100. http://dx.doi.org/10.1093/mnrasl/slaa096.

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ABSTRACT We describe the first complete polarimetric data set of the entire outburst of a low-mass black hole X-ray binary system and discuss the constraints for geometry and radiative mechanisms it imposes. During the decaying hard state, when the optical flux is dominated by the non-thermal component, the observed polarization is consistent with the interstellar values in all filters. During the soft state, the intrinsic polarization of the source is small, ∼0.15 per cent in B and V filters, and is likely produced in the irradiated disc. A much higher polarization, reaching ∼0.5 per cent in

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Ermolli, Ilaria, Theodosios Chatzistergos, Natalie A. Krivova, and Sami K. Solanki. "The potential of Ca II K observations for solar activity and variability studies." Proceedings of the International Astronomical Union 13, S340 (2018): 115–20. http://dx.doi.org/10.1017/s1743921318001849.

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AbstractSeveral observatories around the globe started regular full-disc imaging of the solar atmosphere in the Ca II K line in the early decades of the 20th century. These observations are continued today at a few sites with either old spectroheliographs or modern telescopes equipped with narrow-band filters. The Ca II K time series are unique in representing long-term variations of the Sun’s chromospheric magnetic field. However, meaningful results from their analysis require accurate processing of the available data and robust merging of the information stored in different archives. This pa

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Lamskova, M. I., A. E. Novikov, S. V. Borodychev, and M. I. Filimonov. "Evaluation of corn crops drip irrigation quality at different versions of the tillering zone." IOP Conference Series: Earth and Environmental Science 843, no. 1 (2021): 012060. http://dx.doi.org/10.1088/1755-1315/843/1/012060.

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Abstract Presents results of a study of the uniformity of distribution of irrigation water along the length of the drip lines at its pre-treatment in sand gravel and disc filters (typical) and hydrocyclone installation (experimental version) and the efficiency of water technology in the cultivation of corn. It was found that when using a sand-gravel and disc filter as a water treatment unit on a drip irrigation system, the coefficient of effective irrigation was 0.635, insufficient irrigation - 0.240, and excessive irrigation - 0.125. The use of hydrocyclone installation for water treatment, w

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Fonseca, Paula Rafaela Silva, Erick Javier Centeno Mora, Isabela Ferreira Batista, and Carlos Augusto de Lemos Chernicharo. "Development and performance of a dynamic membrane for anaerobic wastewater treatment – an analysis with different mesh pore sizes and configurations." Water Science and Technology 85, no. 5 (2022): 1400–1411. http://dx.doi.org/10.2166/wst.2022.042.

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Abstract Recent studies have focused on proposing materials with larger pores and lower cost to replace conventional membranes. This study aims to investigate the performance of an anaerobic dynamic membrane bioreactor (AnDMBR) at pilot scale, acting as a post-treatment for an Upflow Anaerobic Sludge Blanket (UASB) reactor treating sewage, for the removal of complementary organic matter, focusing on the module design, dynamic layer formation and process performance. The configurations tested on this study were: UASB followed by stone filter and three AnDMBRs in series with polyester pore sizes

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Saburova, A. S., A. V. Kasparova, I. Yu Katkov, D. V. Bizyaev, and I. V. Chilingarian. "On the general structure of giant low surface brightness galaxy Malin 2." Proceedings of the International Astronomical Union 8, S295 (2012): 236. http://dx.doi.org/10.1017/s1743921313004900.

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AbstractWe carried out the multicolor surface photometry in BVR and griz filters parallel with stellar kinematic measurements from the long slit spectra for the low surface brightness galaxy Malin 2. The use of the multicolor surface photometry as well as the available HI rotation curve allowed us to construct the mass distribution model of the galaxy. Photometrical and dynamical mass estimates agree with the dark halo mass fraction of about 70% within four disc radial scalelengths (~ 70 kpc). We used our dynamical model to obtain radial profiles of the equilibrium disc volume density and gas

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Journal, Baghdad Science. "Producing Ceramic Water Purifiers Made Of Iraqi Bentonite Type (Bpl1)." Baghdad Science Journal 11, no. 2 (2014): 730–41. http://dx.doi.org/10.21123/bsj.11.2.730-741.

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In this study, ceramic purifier (CP) was produced from a mixture of Iraqi raw materials. This ceramic mixture was prepared using Bentonite as a Clay, Porcelanite as a Silica, and Limestone as a flux. The produced ceramic filter was formed by semi-dry compressing method and was fired at 1200 C?. Physical properties of the produced CP were measured. A hydraulic test rig was constructed to study the hydraulic conductivity of the produced CP. The average hydraulic conductivity of the produced CP was 55 times that of commercial types of ceramic filters. The mineral composition of the produced ceram

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Jassim, Sanaa A., Riyadh Z. Al Zubaidy, and Habib Rashid Habib. "Producing Ceramic Water Purifiers Made Of Iraqi Bentonite Type (Bpl1)." Baghdad Science Journal 11, no. 2 (2014): 730–41. http://dx.doi.org/10.21123/bsj.2014.11.2.730-741.

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In this study, ceramic purifier (CP) was produced from a mixture of Iraqi raw materials. This ceramic mixture was prepared using Bentonite as a Clay, Porcelanite as a Silica, and Limestone as a flux. The produced ceramic filter was formed by semi-dry compressing method and was fired at 1200 C?. Physical properties of the produced CP were measured. A hydraulic test rig was constructed to study the hydraulic conductivity of the produced CP. The average hydraulic conductivity of the produced CP was 55 times that of commercial types of ceramic filters. The mineral composition of the produced ceram

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Manjunath Sargur Krishnamurthy. "Precision-Based Detection and Centralization of the Optic Disc in Color Retinal Fundus Images: A Novel Approach." Journal of Information Systems Engineering and Management 10, no. 41s (2025): 168–84. https://doi.org/10.52783/jisem.v10i41s.7810.

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The detection of Optic Disc (OD) stands as the essential process in color retinal image analysis because it represents the main component of the human retina. The detection of Optic Disc along with its center enables healthcare providers to evaluate the severity of conditions like Diabetic Maculopathy (DM) and glaucoma. This document presents a fresh technique to discover optic disc regions while also determining their central areas. The first process enhances the input image through combination of Gaussian, Median, and Weiner filters to create the enhanced image. After image enhancement the m

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Mehrpour, Somayeh, Shahram Shafa, Majid Vatankhah, et al. "Pain Management Methods and Techniques in Lumbar Disc Surgery: A Narrative Review Study." Iranian Journal of Neurosurgery 10 (October 21, 2024): 0. http://dx.doi.org/10.32598/irjns.10.4.

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Background and Aim: This study examines the complex field of pain treatment related to lumbar disc disorders in a narrative review. Methods and Materials/Patients: Our search strategy involved utilizing specific terms, including ‘pain management,’ ‘lumbar disc surgery,’ ‘methods,’ and ‘techniques.’ We formulated a search query using Boolean operators: (‘Pain management’ OR ‘analgesia’) AND (‘lumbar disc surgery’ OR ‘spinal surgery’) AND (‘techniques’ OR ‘procedures’ OR ‘approaches’ OR ‘methods’) AND ‘narrative review.’ A systematic search was conducted across reputable medical databases includ

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Le Conte, Zoe A., Dimitri A. Gadotti, Leonardo Ferreira, et al. "A JWST investigation into the bar fraction at redshifts 1 ≤ z ≤ 3." Monthly Notices of the Royal Astronomical Society 530, no. 2 (2024): 1984–2000. http://dx.doi.org/10.1093/mnras/stae921.

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ABSTRACT The presence of a stellar bar in a disc galaxy indicates that the galaxy hosts in its main part a dynamically settled disc and that bar-driven processes are taking place in shaping its evolution. Studying the cosmic evolution of the bar fraction in disc galaxies is therefore essential to understand galaxy evolution in general. Previous studies have found, using the Hubble Space Telescope (HST), that the bar fraction significantly declines from the local Universe to redshifts near one. Using the first four pointings from the JWST Cosmic Evolution Early Release Science Survey and the in

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Chanda, Katha, Ashish Issac, and Malay Kishore Dutta. "An Adaptive Algorithm for Detection of Exudates Based on Localized Properties of Fundus Images." International Journal of E-Health and Medical Communications 10, no. 1 (2019): 18–37. http://dx.doi.org/10.4018/ijehmc.2019010102.

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This article presents an algorithm to detect exudates, which can be considered as one of the many abnormalities, to identify diabetic retinopathy from fundus images. The algorithm is invariant to illumination and works well on poor contrast images with high reflection noise. The artefacts are correctly rejected despite their colour, intensity and contrast being almost similar to that of exudates. Optic disc is localized and segmented using average filter of specially determined size which is an important step in the rejection of false positives. Exudates are located by generating candidate reg

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Voigt, Claudia, Jana Hubálková, Tilo Zienert, et al. "Aluminum Melt Filtration with Carbon Bonded Alumina Filters." Materials 13, no. 18 (2020): 3962. http://dx.doi.org/10.3390/ma13183962.

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The wetting behavior was measured for Al2O3-C in contact with AlSi7Mg with a conventional sessile drop test (vacuum, 950 °C and 180 min) and a sessile drop test with a capillary purification unit (vacuum, 730 °C and 30 min). The conventional test yielded contact angles of around 92°, whereas the sessile drop measurement with capillary purification showed a strongly non-wetting behavior with a determined apparent contact angle of the rolling drop of 157°. Filtration tests, which were repeated twice, showed that the Al2O3-C filter possessed a better filtration behavior than the Al2O3 reference f

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Haydon, Daniel T., J. M. Diederik Kruijssen, Mélanie Chevance, et al. "An uncertainty principle for star formation – III. The characteristic emission time-scales of star formation rate tracers." Monthly Notices of the Royal Astronomical Society 498, no. 1 (2020): 235–57. http://dx.doi.org/10.1093/mnras/staa2430.

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ABSTRACT We recently presented a new statistical method to constrain the physics of star formation and feedback on the cloud scale by reconstructing the underlying evolutionary timeline. However, by itself this new method only recovers the relative durations of different evolutionary phases. To enable observational applications, it therefore requires knowledge of an absolute ‘reference time-scale’ to convert relative time-scales into absolute values. The logical choice for this reference time-scale is the duration over which the star formation rate (SFR) tracer is visible because it can be cha

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Guo, Xiaoyan, Yuanzhen Ou, Konghong Deng, Xiaolong Fan, Rui Jiang, and Zhiyan Zhou. "A UAV-Borne Six-Vessel Negative-Pressure Enrichment Device with Filters Designed to Collect Infectious Fungal Spores in Rice Fields." Agronomy 14, no. 4 (2024): 716. http://dx.doi.org/10.3390/agronomy14040716.

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Fungal spores that cause infectious fungal diseases in rice are mainly transmitted through air. The existing fixed, portable or vehicle-mounted fungal spore collection devices used for rice infectious diseases have several disadvantages, such as low efficiency, large volume, low precision and incomplete information. In this study, a mobile fungal spore collection device is designed, consisting of six filters called “Capture-A”, which can collect spores and other airborne particles onto a filter located on a rotating disc of six filters that can be rotated to a position allowing for the capture

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Z. A. Abdullah and A. A. Khalaf. "IMPACT OF FILTRATION AND CHLORINATION ON REDUCING CLOGGING IN DRIP EMITTERS." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 55, no. 4 (2024): 1443–53. http://dx.doi.org/10.36103/jgx6xq84.

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This study was aimed to reduce the clogging ratio using two waters qualities Sumael (LSI) and Bazalan (LSII). The physical treatment was carried out using complete filtration unit composed of three of filters (Hydrocyclone, Sand, and Disc filters) and application of hypo chloride (Ca (OCl)2 ) 2 ppm as chemical treatment. Generally, physical treatment was more effective than chemical treatment to reduce clogging ratio for Sumael water (LSI). In contrast, for Bazalan water (LSII), the chlorine application was more practical to reduce clogging ratio. The results showed after the period of 320 hr,

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Miller, Tatiana, Aneta Łętocha, and Krzysztof Gajda. "Influence of Different Filtration Methods Application on a Filtered Surface Profile and Roughness Parameters." Key Engineering Materials 637 (February 2015): 57–68. http://dx.doi.org/10.4028/www.scientific.net/kem.637.57.

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The measurements were performed on the surfaces made of different materials and typical of diversified character. Glass roughness standards with sinusoidal profile, approximately sinusoidal profile and metallic comparative standards after lathing and grinding were object of research. Analysis was performed including the surface and profile evaluation. Statistical analysis was conducted. Measurement sections and other filter parameters were selected in accordance with standards. Measurements were carried out with stylus tip contact method – using TOPO 01P device designed by The Institute of Adv

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Battaglia, Stefano, Marco Franzini, and Leonardo Leoni. "Simultaneous Determination of Layer Thickness, Composition, and Mass Absorption by X-Ray Diffraction." Powder Diffraction 7, no. 4 (1992): 194–96. http://dx.doi.org/10.1017/s0885715600018698.

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AbstractThis paper describes a new method for the simultaneous determination of mineral composition, mass thickness and mass absorption coefficient of a thin layer of a crystalline substance deposited on a crystalline substrate.The samples were deposited on membrane disc filters, consisting of mixtures of cellulose acetate and cellulose nitrate. Quantitative results are achieved by measuring the diffraction intensity of the analyte and the attenuation of a reflection of the crystalline material supporting the deposited sample. The mean accuracy of the analysis was found to be: ≈ 3% for mass th

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Irwin, Patrick G. J., Jack Dobinson, Arjuna James, et al. "Modelling the seasonal cycle of Uranus’s colour and magnitude, and comparison with Neptune." Monthly Notices of the Royal Astronomical Society 527, no. 4 (2023): 11521–38. http://dx.doi.org/10.1093/mnras/stad3761.

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ABSTRACT We present a quantitative analysis of the seasonal record of Uranus’s disc-averaged colour and photometric magnitude in Strömgren b and y filters (centred at 467 and 551 nm, respectively), recorded at the Lowell Observatory from 1950 to 2016, and supplemented with HST/WFC3 observations from 2016 to 2022. We find that the seasonal variations of magnitude can be explained by the lower abundance of methane at polar latitudes combined with a time-dependent increase of the reflectivity of the aerosol particles in layer near the methane condensation level at 1 – 2 bar. This increase in refl

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