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In this study, it was observed the influence of the presence of cunps in formation water on the potential for scale formation and corrosion. Formation water obtained from production wells in the wonocolo region, cepu, central java, is used as a sample to test the effect of cunps on the scale and corrosion trends.
In this work, the effect of silicate on copper pipe corrosion during stagnation was studied. In addition, the effect of silicate and phosphate on copper pipe corrosion was compared. Using a laboratory setup, copper pipe corrosion experiments were performed under controlled ph conditions.
Studies of the effect of typical laboratory experiences on student interest are much rarer than those focusing on student achievement or other cognitive outcomes (hofstein and lunetta, 2004; white, 1996).
Oct 1, 1982 also examined were the effects of diametral and axial specimen impact and scale-up studies of brittle fracture of larger realistic waste forms.
Focus topics of this research included experimentation with a mechanical impulse hydraulic fracturing method, measurement of critical state hydraulic fracture aperture, laboratory scale modeling of egs, and an investigation of grain-scale effects on 3d hydraulic fracture geometry.
At later stages of the design, small-scale laboratory experiments with high-speed granular flows hitting obstacles were conducted.
This study investigated experimentally whether acute stress alters food choice during a meal. The study was designed to test claims of selective effects of stress on appetite for specific sensory.
Laboratory scale study to quantify the effect of sediment accumulation on the hydraulic conductivity of pervious concrete.
Studies of the effects of insect-resistant transgenic plants on beneficial insects have, to date, concentrated mainly on either small-scale worst case scenario laboratory experiments or on field trials.
Scale-up and scale-down of chemical processes special topics in industrial chemistry seppo karrila november 2014. Executive summary • in scale-up, product and process development tend to move in small steps – lab scale to bench scale, then to pilot scale, finally to production scale – this reduces the risk with the larger investments in the next step • scale-down is mainly for troubleshooting or development of processes used in ongoing production.
In the present study, the potentiality of hydrodynamic cavitation (hc) for the degradation of methyl orange from synthetic aqueous solutions is presented. Hydrodynamic cavitation was set up at laboratory scale using a venturi tube.
Hydrodynamic effects on the performance of a laboratory-scale fluidized bed reactor background and motivation (1) • high yield and composition of raw oil are key, so commercial risk and economics depend on accurate performance predictions. • most available basic lab data are from bubbling fluidized bed reactors (fbrs).
To assess the accuracy of laboratory scale, a standard weight known to weigh 10 grams is weighed repeatedly.
Dec 1, 2020 in this study, to enhance gas recovery from a methane hydrate reservoir, experimental and numerical studies that considered the acid injection.
Gut and płaza, laboratory-scale study on treatment of high-strength ammonium 104 materials and methods design and operation of the laboratory-scale pilot plant the laboratory-scale pilot plant studies were carried out during a 3-month period at the department.
Study of exothermic runaway reactions at safe laboratory scale using accelerating rate calorimetry effect of heat upon materials and simulating runaway reactions.
A laboratory study was made to develop means to predict the effects of increased net overburden pressures on fracture capacity. Both fabricated cores and reservoir core samples containing natural fractures were investigated. Response to confining pressure increase was found significant and similar for both types of fracture systems.
Secondly, to investigate the effect of changing gas/oil ift value (immiscible and near-miscible) on the performance of wag injections and residual oil saturation reduction at laboratory scale. Two- and three-phase (wag) coreflood experiments have been performed on water-wet and mixed-wet cores at three different gas/oil ift conditions.
In this study, rtd was applied in a laboratory scale struvite crystallization reactor to estimate the degree on non-ideality and its effect on the reactor performance.
In this present study, the leaching of phosphorus (contained in fire-trol 931-a long-term fire retardant based on polyphosphates) from a typical mediterranean forest soil, was studied at the laboratory scale.
This paper presents a review of the state of the art of laboratory-scale hydraulic fracturing experiments, focusing on the scaling analysis.
Study of scale effect on limestone’s sh ear strength on laboratory test ridwan syarif 1 and nuhindro priagung widodo 2 1 department mining engineering, faculty of petro leum and mine engineering.
4 verification measurements the effect of entrance length was studied by measuring the fluid velocity profile at five locations between the measurement tube inlet and the lower pressure loss measurement point.
The purpose of this research is to clarify the scale effect on the uni-axial compressive behavior of concrete-filled steel tube (cft) short columns. Three different sizes of cft short column specimens were tested. Other experimental parameters were the shape of the cross section, the strength of filled concrete and loading methods. Scale effects on the compressive strength of square cft columns were observed, while those of circular cft columns were not clearly observed.
Standard laboratory production of lvs is not easily scalable, and research-grade lvs often contain contaminants that can interfere with.
6 computational study on biomass fast pyrolysis oil yield: effects of the bubbling-to-slugging transition in a laboratory-scale fluidized bed objective: assist experimental demonstrations and scale-.
Effect of dry-wet cycling on the mechanical properties of rocks: a laboratory-scale experimental study xiaojie yang 1,2, jiamin wang 1,2,*, dinggui hou 3, chun zhu 1,* and manchao he 1 1 state key laboratory for geomechanics and deep underground engineering, china university of mining.
Lab scale activated sludge reactors have been employed by those in academia who study wastewater systems for decades to analyze the effects of selected.
The study aims to search the effect of guided inquiry laboratory experiments on students' attitudes towards chemistry laboratory, chemistry laboratory anxiety and their academic achievement in the laboratory.
Developing students’ critical thinking skills is often seen as an important educational goal for inquiry assignments. In this study, we investigated to what extent pre-laboratory activities of a chemical inquiry assignment influence students' independent critical thinking.
1450) defines a hazardous substance as a chemical for which there is statistically significant evidence based on at least one study conducted in accordance with established scientific principles that acute or chronic health effects may occur in exposed employees.
This has led researchers to increasingly consider hydraulic studies using scale-model ponds under controlled laboratory conditions. The predominant experimental technique used to date, in both field and laboratory experiments, has been stimulus response, dye tracer studies.
Experimental laboratory scale study on how two different aquatic plant species, typha latifolia and saccharum spontaneum reduce cod, bod, and tss concentration from municipal wastewater. Preparation of aquatic plant typha latifolia and saccharum spontaneum collected from.
A solute transport study was designed to test the validity of the convection-dispersion model in a series of experiments which varied soil column width and length. The studies were performed at three steady-state water flux rates (8, 4, 2 cm d sup-1/sup in both undisturbed and packed columns containing tujunga loamy sand. The series of experiments for both undisturbed and repacked soil.
Jul 19, 2005 premixed turbulent flames are of increasing practical importance and remain a significant research challenge in the combustion community.
Dec 4, 2020 boulder crusher dust (bcd) is a waste by-product of crusher units left in huge quantities posing huge environmental, health as well as disposal.
These studies are classified into the analysis of the physical phenomena observed in laboratory-scale experiments, such as the movement of the mh dissociation front and the flow behavior of gas and water, and field-scale simulations of a potential mh resource.
In order to realize such an application potential of the sbes, in this laboratory-scale study we investigated the effect of several controllable and uncontrollable operational factors on the in-situ bioremediation performance of a tank model of a brackish aquaculture pond, into which a sbes was integrated, in comparison with a natural degradation control model. The performance was evaluated in terms of electricity generation by the sbes, chemical oxygen demand (cod) removal and nitrogen.
Review the effects of long working hours on various outcomes, including fatigue, health and safety effects, psychological effects, accident rates, and work-life balance. Specifically, the review aims to see if any studies suggest that reducing long working hours leads to improvements in health and safety.
Laboratory scale study to quantify the effect of sediment accumulation on the hydraulic conductivity of pervious concrete june 2014 journal of irrigation and drainage engineering 140(6):1.
Laboratory-scale study of hydraulic fracturing in heterogeneous media for enhanced geothermal systems and general well stimulation citable link(s) download/.
Working on the laboratory scale or on the field scale, seismic measurements only probe a portion of a fracture (local measurement). The area illuminated by the wavefront is a function of the wavelength as well as the source-receiver configurations.
For instance, a firm may hold a patent over a mass production machine, which allows it to lower its average cost of production more than other firms in the industry. These refer to economies of scale enjoyed by an entire industry.
Field observations by other authors indicate that dispersivity is dependent on distance from source.
The objective of this study was to evaluate the factors that affect the formation and diffusion of disinfection by-products, especially trihalomethanes (thm), in a laboratory-scale water distribution network constructed with three different pipe materials. Sampling locations were chosen on the basis of residence time, pipe material and mixing zone.
This study aims to report characteristics of particle size distributions in well controlled repeatable lab scale biomass fires for southwestern united states fuels.
0x10-5 m sec-1 for each simulated aquifer, based on the previous studies.
There is a growing debate in the literature regarding the tradeoffs between lab and field evaluation of mobile devices. This paper presents a comparison of field-based and lab-based experiments to evaluate user experience of personalised mobile devices at large sports events. A lab experiment is recommended when the testing focus is on the user interface and application-oriented usability.
A study of fluid-rock interaction is essential to determine the chemical changes and mineral alteration in enhanced geothermal system. Preliminary mineralogical investigation and geothermal experiments have been performed to investigate the hydrothermal alteration of the habanero 3 well in the cooper basin, south australia.
From laboratory scale experimental data is of great importance for the commercialisation of the continuous adsorption process. In this study, the experimental data from laboratory scale packed bed adsorption column was used for designing the adsorption column. The laboratory scale column study was carried out using modified coal.
The results from this study will help us in better understanding the optical nature of fog and designing of future fog vision devices. Experimental study of the effects of environmental and fog condensation nuclei parameters on the rate of fog formation and dissipation using a new laboratory scale fog generation facility - aerosol and air quality research.
In our research we aim to study the effects of mud on the shape and evolution of the large-scale effect is less widening of the estuary in the presence of mud and effects of cohesive sediment on estuarine morphology in laboratory.
Dec 25, 2008 nities and new insights into the physical phenomena. The majority of the published laboratory-scale research focuses on how a ''witness plate''.
A laboratory-scale experimental study of in-situ combustion for enhanced oil recovery is presented. The effects of oil saturation, preheating of the oil-sand bed, porosity of sand, and air-injection rate on both the time history of liquid yield and the total liquid yield have been determined.
A mesocosm is any outdoor experimental system that examines the natural environment under controlled conditions. In this way mesocosm studies provide a link between field surveys and highly controlled laboratory experiments. Mesocosms also tend to be medium-sized to large and contain multiple trophic levels of interacting organisms. In contrast to laboratory experiments, mesocosm studies are normally conducted outdoors in order to incorporate natural variation.
Bertelkamp, cheryl, arne verliefde, klaas schoutteten, lynn vanhaecke, julie vanden bussche, n singhal, and jp van der hoek. “the effect of redox conditions and adaptation time on organic micropollutant removal during river bank filtration: a laboratory-scale column study.
The effect of colour depth and image resolution on laboratory scale study of aquifer saltwater intrusion. Paper presented at civil engineering research in ireland 2020, cork, ireland. Paper presented at civil engineering research in ireland 2020, cork, ireland.
The lab-scale kinetics of these processes were studied using thermogravimetric analysis and sorption analysis.
Effect of macrozoobenthos on two‐dimensional small‐scale heterogeneity of pore water phosphorus concentrations in lake sediments: a laboratory study jörg lewandowski leibniz‐institute of freshwater ecology and inland fisheries, müggelseedamm 301, d-12587 berlin, germany.
This study measured the effect of sediment accumulation on the hydraulic conductivity of pervious concrete. The resulting data were used to develop a model that predicts the hydraulic conductivity of pervious concrete based on the initial hydraulic conductivity and the amount and type of accumulated sediment.
The surrey communication and language in education study (scales) is the first uk population study of language development and disorder at school entry. The study is funded by wellcome and the esrc and involves more than 180 schools across surrey.
This phenomenon, called the scale effect (fried, 1975), can be explained as a consequence of local variations in water velocity along the direction of dispersion scale effect in column outflow experiments 121 motion, causing solute carried with the moving water to spread longitudinally by virtue of differences in convective velocity.
Simulations are vetted through code validation by benchmarking against relevant laboratory‐scale impact experiments. Comparisons between our numerical simulations and data from the nakamura and fujiwara ( 1991 ) basalt sphere impact experiment have provided new guidance for how to select appropriate strength and damage parameters for brittle.
Developing students' critical thinking skills is often seen as an important educational goal for inquiry assignments.
Experimental study of charge dynamics in a laboratory-scale ball mill zixin yin, yuxing peng, zhencai zhu, zhangfa yu, tongqing li, lala zhao, and jie xu proceedings of the institution of mechanical engineers, part c: journal of mechanical engineering science 2017 232 19 3491-3499.
Researchers often prefer the laboratory design to the field because of problems with informed consent and privacy of the participants. Due to the greater control that researchers are generally able to exert in a laboratory setting than in a naturalistic setting, laboratory research studies are more likely to represent a true experimental design.
Nov 8, 2017 several authors studied the impact of shaking frequency, shaking diameter and liquid volume on kla, the strength and location of shear forces.
Obtained from laboratory scale experimental data were used to design the packed bed column. It was observed that the flow rate affects the breakthrough curve and adsorption efficiency decreases with increase in flow rate.
The accumulation of scale, which will impact the efficiency of tankless and gas storage water heaters and can lead to decreased equipment life. Conversely, soft water increases the risk of corrosion, which can decrease equipment life by more than half if not properly mitigated.
Oct 17, 2016 internal diesel injector deposits (idid) in compression ignition engines have been widely studied in the past few years.
Tonner, troy (2018) understanding the effect of extrusion conditions on melt viscosity to aid in modeling of a single screw extruder with internal restrictions for scale-up purposes tosun, tulin ece (2018) haremization of desdemona: a comparative study of shakespeare's othello in the ottoman context.
We investigate the effect of different operating conditions on the combustion process of the wall-fired furnace. The flue gas temperature, furnace wall temperature, and spatial distribution of local heat flux on the wall of a laboratory-scale, gas fuel front wall-fired furnace are measured experimentally. Different combinations of operating conditions including swirl intensity (si), air supply.
For the purposes of this study, the literature on the subject was first reviewed, and a strongly-curved open channel was designed and constructed on the laboratory scale.
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