You searched for +publisher:"Rutgers University" +contributor:("Rossmann, Tobias "). Showing records 1 – 14 of 14 total matches.
1. Seitel, Christel M. Comparing the inviscid and viscous flows in a shock tube to analyze the boundary layer effects.
▼ The purpose of the present work is to analyze the effects of viscosity in the Mechanical and Aerospace Engineering Undergraduate Laboratory shock tube at a pressure ratio (p4/p1) of approximately 1.54. Ten tests were performed at this ratio to check for consistency in the system. The experimental results from this facility were compared with results obtained from the typical shock tube equations, as well as computer simulations in Matlab and GASP. Among these methods, GASP was the only one which took viscosity into consideration. Multiple simulations were run with this program to determine the appropriate grid size (coarse or fine), as well as compare the inviscid and viscous results. The other methods (theory and Matlab) assumed a one-dimensional inviscid flow for simplification of the computation. The results showed that all of the data from the latter three methods matched relatively well for the flow in the center of the shock tube. However, near the wall, the viscous GASP computation showed a variation in density, temperature, and velocity, while the others remained at a constant value. This is due to the no-slip boundary condition at the walls used for the viscous flow. By taking a specific point along the shock tube with viscous flow and comparing the velocity profiles from when the incident wave and when the reflected wave passes, it was discovered that a wall jet was created in the boundary layer. This jet moves in the opposite direction of the mainstream flow and at a much higher speed (more than 20~m/s greater). Advisors/Committee Members: Seitel, Christel M. (author), Rossmann, Tobias (chair), Knight, Doyle (co-chair), Diez, Francisco (internal member).
Seitel, Christel M. "Comparing the inviscid and viscous flows in a shock tube to analyze the boundary layer effects." 2009. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051067.
Seitel, Christel M. "Comparing the inviscid and viscous flows in a shock tube to analyze the boundary layer effects." 2009. Web. 23 Apr 2019.
Seitel CM. Comparing the inviscid and viscous flows in a shock tube to analyze the boundary layer effects. [Internet] [Masters thesis]. Rutgers University; 2009. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051067.
2. Zhu, Ye, 1985-. Numerical investigation of energy deposition for supersonic flow over a 2-D diamond-shaped airfoil.
▼ The research models inviscid compressible flow at Mach 2 over a two dimensional diamond-shaped airfoil. The objective is to study the interaction of the energy deposition added in the upstream flow on the airfoil. Theoretical results without energy deposition in the inlet boundary and numerical results with no filaments, infinitely long symmetric filament, symmetric pulsed filament, and asymmetric pulsed filament, for Mach number, temperature, pressure in the flow field domain, are obtained. An analysis is performed on the drag coefficient acting on the airfoil. FLUENT, Gambit, and C++ are used for the numerical simulation. Advisors/Committee Members: Zhu, Ye, 1985- (author), Knight, Doyle D (chair), Shan, Jerry (internal member), Rossmann, Tobias (internal member).
Zhu, Ye, 1985-. "Numerical investigation of energy deposition for supersonic flow over a 2-D diamond-shaped airfoil." 2010. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056877.
Zhu, Ye, 1985-. "Numerical investigation of energy deposition for supersonic flow over a 2-D diamond-shaped airfoil." 2010. Web. 23 Apr 2019.
Zhu, Ye 1. Numerical investigation of energy deposition for supersonic flow over a 2-D diamond-shaped airfoil. [Internet] [Masters thesis]. Rutgers University; 2010. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056877.
Nimbalkar, Sachin. "Quantitative observations on multiple flow structures inside Ranque Hilsch vortex tube." 2009. Doctoral Dissertation, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051387.
Nimbalkar, Sachin. "Quantitative observations on multiple flow structures inside Ranque Hilsch vortex tube." 2009. Web. 23 Apr 2019.
Nimbalkar S. Quantitative observations on multiple flow structures inside Ranque Hilsch vortex tube. [Internet] [Doctoral dissertation]. Rutgers University; 2009. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051387.
4. Dadia, Dhaval D., 1984-. Modeling wing tank flammability:.
▼ An investigation into the fire safety of a wing fuel tank has been performed to aid in the effort to eliminate or reduce the possibility of a wing fuel tank explosion in a commercial aircraft. A computational model is built to predict the generation of flammable mixtures in the ullage of wing fuel tanks. The model predicts the flammability evolution within the tank based on in-flight conditions of a wing fuel tank. The model is validated through supporting experiments performed in an altitude chamber, the wind tunnel facility as well as data obtained from flight tests. The results from the experiments are compared to the computational results. Computational results from the altitude chamber follow the general trend of the experimental results, but produce them at a different flash point. This is due to the replenishment of species with lower flash point at the surface of the fuel which emulates the flash point of the entire fuel to be lower. Experimental results for the aluminum wing tests from the wind tunnel experiments are in good agreement with the computational results as well. A simpler model is developed from a program that calculates fuel air ratio within the ullage of fuel tanks in order to reduce the required number of inputs to the model. This model is applied to the data sets for the experiments performed in the altitude chamber and wind tunnel. For the tests conducted in the altitude chamber, the correlation estimates the hydrocarbon concentrations extremely well during ascent and descent. During the on-ground condition the estimation is good, but not as accurate as the ascent or descent conditions. For the tests conducted in the wind tunnel, the computational values follow the general trend of the experimental values, but the computational values estimates the total hydrocarbon concentration approximately 10% lower than the experimental value consistently. Flammability studies are also performed in order to track the effects of temperature, pressure, and oxygen concentration on the upper and lower flammability limits. For the temperature and pressure profiles considered in this work, it is found that the temperature and pressure effects on the flammability limits are minimal. In contrast, the oxygen concentration has a significant effect on the flammability limits of the vapor; the flammable region narrows with a decrease in oxygen concentration. Advisors/Committee Members: Dadia, Dhaval D., 1984- (author), Rossmann, Tobias (chair), Polymeropoulos, Constantine (internal member), Diez-Garias, Francis (internal member).
Dadia, Dhaval D., 1984-. "Modeling wing tank flammability:." 2009. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051801.
Dadia, Dhaval D., 1984-. "Modeling wing tank flammability:." 2009. Web. 23 Apr 2019.
Dadia, Dhaval D. 1. Modeling wing tank flammability:. [Internet] [Masters thesis]. Rutgers University; 2009. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051801.
5. Naiman, Hadassah. Analysis and design of quiet hypersonic wind tunnels:.
The purpose of the present work is to integrate CFD into the design of quiet hypersonic wind tunnels and the analysis of their performance. Two specific problems are considered. The first problem is the automated design of the supersonic portion of a quiet hypersonic wind tunnel. Modern optimization software is combined with full Navier-Stokes simulations and PSE stability analysis to design a Mach 6 nozzle with maximum quiet test length. A response surface is constructed from a user-specified set of contour shapes and a genetic algorithm is used to find the "optimal contour", which is defined as the shortest nozzle with the maximum quiet test length. This is achieved by delaying transition along the nozzle wall. It is found that transition is triggered by Goertler waves, which can be suppressed by including a section of convex curvature along the contour. The optimal design has an unconventional shape described as compound curvature, which makes the contour appear slightly wavy. The second problem is the evaluation of a proposed modification of the test section in the Boeing/AFOSR Mach 6 Quiet Tunnel. The new design incorporates a section of increased diameter with the intention of enabling the tunnel to start in the presence of larger blunt models. Cone models with fixed base diameter (and hence fixed blockage ratio) are selected for this study. Cone half-angles from 15° to 75° are examined to ascertain the effect of the strength of the test model shock wave on the tunnel startup. The unsteady, laminar, compressible Navier-Stokes equations are solved. The resulting flowfields are analyzed to see what affect the shocks and shear layers have on the quiet test section flow. This study indicates that cone angles ≤20° allow the tunnel to start.
Advisors/Committee Members: Naiman, Hadassah, (author), Knight, Doyle (chair), Rossmann, Tobias (internal member), Diez, F. (internal member), Richter, Gerard (outside member).
Naiman, Hadassah. "Analysis and design of quiet hypersonic wind tunnels:." 2010. Doctoral Dissertation, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052138.
Naiman, Hadassah. "Analysis and design of quiet hypersonic wind tunnels:." 2010. Web. 23 Apr 2019.
Naiman H. Analysis and design of quiet hypersonic wind tunnels:. [Internet] [Doctoral dissertation]. Rutgers University; 2010. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052138.
6. Ma, Qiulin, 1980-. Fabrication, characterization and sensor applications of optical whispering gallery mode coupling system.
Ma, Qiulin, 1980-. "Fabrication, characterization and sensor applications of optical whispering gallery mode coupling system." 2010. Doctoral Dissertation, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056574.
Ma, Qiulin, 1980-. "Fabrication, characterization and sensor applications of optical whispering gallery mode coupling system." 2010. Web. 23 Apr 2019.
Ma, Qiulin 1. Fabrication, characterization and sensor applications of optical whispering gallery mode coupling system. [Internet] [Doctoral dissertation]. Rutgers University; 2010. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056574.
7. Zarzecki, Mariusz. Combustion of polymers in a low pressure and low oxygen environment.
▼ The effect of low pressure on the behavior of fires is very important to the study of fire safety in the aviation industry. This thesis explores the effect of low pressure on different components of flammability at low pressures, like those encountered at high altitude. An experiment was setup to measure the time to ignition, the mass flux at ignition, as well as the steady burning mass flux for different pressures and oxygen concentrations. The test measured the mass loss, oxygen consumption, soot production and average flame temperature. A square sample of PMMA was burned under different external heat fluxes, total pressures and oxygen concentrations. The experiments were compared to analytical expressions, to try to understand how pressure and oxygen concentration affect the behavior of a fire. Low pressure environment reduced the ignition delay time, indicating a sample is more prone to ignition at lower pressure. On the other hand the sample showed a reduction of steady burning mass flux, indicating the fire is less intense at lower pressure. The results show a good agreement with the analytical analysis Advisors/Committee Members: Zarzecki, Mariusz (author), Diez, Francisco Javier (chair), Rossmann, Tobias (co-chair), Guo, Zhixiong (internal member).
Zarzecki, Mariusz. "Combustion of polymers in a low pressure and low oxygen environment." 2012. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065306.
Zarzecki, Mariusz. "Combustion of polymers in a low pressure and low oxygen environment." 2012. Web. 23 Apr 2019.
Zarzecki M. Combustion of polymers in a low pressure and low oxygen environment. [Internet] [Masters thesis]. Rutgers University; 2012. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065306.
8. Ojala, Douglas E., 1987-. Characterization of shock wave turbulent boundary layer interaction using particle image velocimetry.
▼ A method for the use of Particle Image Velocimetry in the Rutgers Supersonic Wind Tunnel is established and described. The use of ice crystals as PIV seed material is tested using an oblique shock as a step response to estimate the particle lag time and particle diameter. These values were found to be 2.8 µs and 0.43 µm respectively. The Stokes number was found to be St = 0.11. The statistical properties of the undisturbed boundary layer are determined using PIV data and simplifying assumptions. The boundary layer thickness is δ = 15.6mm and the free stream velocity is U1 = 621m/s. This velocity corresponds to an approximate Mach number of 3.22. Using the Clauser method, the shear velocity is u = 22.45m/s. The log-law region has a last reliable point at height y+ ≈ 500 and extends to y+ ≈ 3000. Velocity fluctuation values and trends are in agreement with published results. Investigation of streamwise XY planes of the boundary layer suggest the existence of coherent structures, particularly hairpin vortices. Galilean decomposition clearly shows vortex structures at height y/δ≈0.2 at a convection velocity of Uc/U∞ = 0.75. Investigating a spanwise XZ plane at height y/δ=0.1 shows coherent regions of high and low velocity which stretch beyond the field of view. Shock Wave Turbulent Boundary Layer Interaction is investigated in the case of a 6 and 9 degree angle of attack flat plate used to generate an oblique shock which impinges upon the turbulent boundary layer. In the 9 degree case, an average separated region of the boundary layer exists to be 2.11δ long in the streamwise direction and exhibits the characteristics of a strong interaction. Ahead of the separated region, a separation shock shows streamwise motion of about ±0.25δ. The 6 degree case shows no boundary layer separation in the mean flow. A reflected shock exhibits reasonably steady behavior which is characteristic of a weak interaction. The sonic line shows that the subsonic layer dilates to a height of y/δ=0.27 and y/δ=0.7 for the 6 and 9 degree case respectively. In both interactions, the recovery of the boundary layer extends beyond the field of view in the streamwise direction. Advisors/Committee Members: Ojala, Douglas E., 1987- (author), Rossmann, Tobias (chair), Knight, Doyle (internal member), Shan, Jerry (internal member).
Ojala, Douglas E., 1987-. "Characterization of shock wave turbulent boundary layer interaction using particle image velocimetry." 2012. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064156.
Ojala, Douglas E., 1987-. "Characterization of shock wave turbulent boundary layer interaction using particle image velocimetry." 2012. Web. 23 Apr 2019.
Ojala, Douglas E. 1. Characterization of shock wave turbulent boundary layer interaction using particle image velocimetry. [Internet] [Masters thesis]. Rutgers University; 2012. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064156.
9. Maloney, Thomas C., 1988-. The collection of ice in jet A-1 fuel pipes.
▼ Ice collection and blockages in fuel systems have been of interest to the aerospace community since their discovery in the late 1950's when a B-52 crashed. A recent growth of interest was provoked by several incidents that occurred within the last few years. This study seeks to understand the underlying principles of ice growth in fuel flow systems. Tests were performed in a recirculated fuel system with a fuel tank that held approximately 115 gallons of Jet A-1 fuel and ice accumulation was observed in two removable test pipes. The setup was in an altitude chamber capable of -60 °F and the experiments involved full scale flow components. Initially, tests were done to better understand the system and variables that effected accumulation. First, initial conditions within the test pipes were varied. Next, pipe geometry, pipe surface properties, initial water content of the fuel and heat transfer from the fuel pipe were varied. As a result of the tests, observations were made about other effects involved in the study. The effects include: the result of sequentially run tests, the effect of the fuel on the freezing temperature of the entrained water, the effect of ice accumulation on pipe welds, and the effect of the test pipe entrance and exit flow conditions on ice accumulation. The results of initial tests were qualitative. Later quantitative tests were done to demonstrate the dependence of temperature, Reynolds number, and heat transfer on ice accumulation. Tests were quantified with a pressure increase across the pipe sections that was normalized by the expected theoretical initial pressure. As a result of these tests the effect of contamination in the fuel was revealed. For ease of reference, the initial tests were called "stage I" and the later tests were called "stage II". The results of stage I showed that accumulation of soft ice was greatest when a layer of hard ice had initially formed on the pipe surface. Stainless steel collected more ice than Teflon and there was a lack of a preferential accumulation region downstream of a pipe bend. A greater heat transfer from the pipe increased ice accumulation for aluminum that was made rough with 80 grit sand paper, and for Teflon. Water was shown to collect in the pipe system as the number of tests increased and the freeze temperature of either the hard or soft ice was about 0 °C. Finally, results of "stage I" tests showed that stainless steel pipe welds were a preferred sight for ice to accumulate. Repeatability was done first in stage II and the normalized pressure increase for two 3/4" un-insulated pipe tests were within 7%. Normalized pressure increase across a pipe was shown to increase as Reynolds number decreased. A 50% increase in Reynolds number led to a 40% decrease in characteristic normalized pressure increase (CNPI). Tests were done at three temperatures and ice accumulated the most at -11 °C. The CNPI at -11 °C was about three times greater than the CNPI at -7.4 °C and about sixty times greater than the CNPI at -19.4 °C. A greater heat transfer… Advisors/Committee Members: Maloney, Thomas C., 1988- (author), Rossmann, Tobias (chair), Diez, Fransisco Javier (co-chair), Jaluria, Yogesh (internal member).
Maloney, Thomas C., 1988-. "The collection of ice in jet A-1 fuel pipes." 2012. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066906.
Maloney, Thomas C., 1988-. "The collection of ice in jet A-1 fuel pipes." 2012. Web. 23 Apr 2019.
Maloney, Thomas C. 1. The collection of ice in jet A-1 fuel pipes. [Internet] [Masters thesis]. Rutgers University; 2012. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066906.
10. Zhang, Jia, 1984-. An analysis of electrohydrodynamic stability and deformation in immiscible fluids.
Zhang, Jia, 1984-. "An analysis of electrohydrodynamic stability and deformation in immiscible fluids." 2012. Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000067034.
Zhang, Jia, 1984-. "An analysis of electrohydrodynamic stability and deformation in immiscible fluids." 2012. Web. 23 Apr 2019.
Zhang, Jia 1. An analysis of electrohydrodynamic stability and deformation in immiscible fluids. [Internet] [Thesis]. Rutgers University; 2012. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000067034.
11. Gomes, Kevin D. Experimental investigation of air cooling systems for electronic equipment by using vortex promoters.
▼ Electronic systems these days are getting more powerful and processing speeds are increasing, resulting in increasing heat inputs to the systems. In order to keep up with these speeds, different cooling techniques must be considered. The present study consists of three parts. In the first part, we consider the flow due to a vortex promoter only. The periodic or chaotic behavior in the wake behind the promoter could be beneficial to the heat transfer rate. By analyzing different sizes and shapes, it can determine which vortex promoter offers the best turbulence and at which frequency it occurs. In the second part of the study, the flow over a plate with isolated heat sources only is considered. From here, a base case of just plate flow being perturbed can be achieved. By analyzing the heat transfer rate and the heat transfer coefficient, an understanding on why the larger the separation width between the two heaters, the higher the heat transfer rate can be seen. In the last part of the study, tests are done for the combination of the vortex promoter and the plate. Here, the effects on the heat transfer rate and the heat transfer coefficient are seen by placing a vortex promoter in front of the plate. Comparisons for the same sizes and shapes used in the first part, along with different heater and plate separations are performed here. From these tests, an optimal promoter is chosen and the distance from the heat sources the promoter has to be, in order to achieve the maximum heat transfer rate and heat transfer coefficient is determined. Advisors/Committee Members: Gomes, Kevin D. (author), Jaluria, Yogesh (chair), Shan, Jerry (internal member), Rossmann, Tobias (internal member).
Gomes, Kevin D. "Experimental investigation of air cooling systems for electronic equipment by using vortex promoters." 2007. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.15857.
Gomes, Kevin D. "Experimental investigation of air cooling systems for electronic equipment by using vortex promoters." 2007. Web. 23 Apr 2019.
Gomes KD. Experimental investigation of air cooling systems for electronic equipment by using vortex promoters. [Internet] [Masters thesis]. Rutgers University; 2007. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.15857.
12. VanderVeer, Joseph R. A study of in-cylinder combustion processes by using high speed multi-spectral infrared imaging and a robust statistical analysis method.
▼ Combustion processes in a spark-ignition engine were studied by using a high speed multi-spectral infrared camera system and a new robust statistical analysis method. Among the variables in the experiment are fuel and fuel additives. The images were obtained using Rutgers Super Imaging System, which consists of four spatial infrared cameras. The cameras are designed to be spatially aligned and their wavelengths are 3.8 mu m, 2.09 mu m, 3.48 mu m, 2.47 mu m. Each camera consists of a Pt-Si charge-coupled device with a pixel array of 64 x 64 and a depth of 12 bits. The engine used is a 1999 Ford Mustang 4.6L engine. This engine was modified to allow optical access by means of a bowditch method. The piston was redesigned for this study. Instead of graphite rings, metallic rings and oil lubricant were used to seal the combustion chamber. A statistical analysis tool (CASAT) was developed to analyze infrared images. This tool included multiple methods for statistically analyzing the fuels, most notably the novel method time derivative spatial averaging (TDSA). The ultimate goal of the research was to verify the capabilities of the TDSA method. This was achieved via a blind study, consisting of 10 unknown fuels; 2 base fuels and 8 fuels with additives. The results of the TDSA method predicted four fuels had various amounts of an octane improver, and the other four had a cetane improver. The actual results were octane improver and combustion enhancer. The effects of a cetane improver of gasoline and the effects of a combustion enhancer of gasoline are very similar. Advisors/Committee Members: VanderVeer, Joseph R. (author), Rhee, Kyung (chair), Tse, Stephen (internal member), Rossmann, Tobias (internal member).
VanderVeer, Joseph R. "A study of in-cylinder combustion processes by using high speed multi-spectral infrared imaging and a robust statistical analysis method." 2008. Masters Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17232.
VanderVeer, Joseph R. "A study of in-cylinder combustion processes by using high speed multi-spectral infrared imaging and a robust statistical analysis method." 2008. Web. 23 Apr 2019.
VanderVeer JR. A study of in-cylinder combustion processes by using high speed multi-spectral infrared imaging and a robust statistical analysis method. [Internet] [Masters thesis]. Rutgers University; 2008. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17232.
13. Xu, Fusheng. Investigating flame-based synthesis of carbon nanotubes and metal-oxide nanowires.
The synthesis of carbon nanotubes (CNTs) and metal-oxide nanowires (e.g. ZnO, WO2.9) are examined experimentally by inserting probes into various flame geometries at atmospheric pressure. The main probed-flame configurations are the inverse co-flow diffusion flame (IDF) and the counter-flow diffusion flame (CDF), which are compared with each other to assess the translatability of local synthesis conditions in producing the same growth attributes and morphologies. The CDF is characterized using laser-based spontaneous Raman spectroscopy (SRS), and validated with simulations using detailed chemical kinetics and transport. SRS is used to measure local conditions in the 2-D axi-symmetric IDF. Properties of the as-synthesized nanostructures are determined by field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDXS), and resonance Raman spectroscopy (RRS). Various morphologies of CNTs are grown catalytically on metal-alloy substrates of different compositions (i.e., Fe, Fe/Cr, Ni/Cu, Ni/Ti, Ni/Cr, Ni/Cr/Fe), as well as on metal-oxide solid solutions (i.e. NiAl2O4, CoAl2O4 and ZnFe2O4). Vertically well-aligned multi-walled CNTs (MWNTs) with uniform diameters are obtained from Ni/Cr/Fe and Ni/Ti alloys. CNTs produced from ZnFe2O4 substrates are found to be a mixture of MWNTs and single-walled carbon nanotubes (SWNTs) with at least 30% SWNTs by number. Effects of local gas-phase temperature, substrate temperature, carbon-based precursor species concentrations, and substrate voltage bias on CNT formation, diameter, growth rate, yield, density, and morphology are investigated. Aligned single-crystal tungsten oxide nanowires with diameters of 20-50nm are grown directly from tungsten substrates at high rates, with local gas-phase temperature and chemical species specified at the substrate for self-synthesis. Voltage bias is shown to dramatically alter the morphologies of the as-synthesized WOx nanomaterial. Single-crystalline ZnO nanowires are grown directly on zinc-plated steel substrates at high rates with no catalysts. Larger-diameter (>100nm) nanowires are produced at higher temperatures; while smaller-diameter (25-40nm) nanowires are produced at lower temperatures, and only on the fuel side of the reaction zone. Reactions with H2O appear to be the dominant route for nanowire synthesis. Nanoribbons and other nanowire-based morphologies are also found and discussed.
Advisors/Committee Members: Xu, Fusheng (author), Tse, Stephen D. (chair), Jaluria, Yogesh (internal member), Rossmann, Tobias (internal member), Kear, Bernard H. (outside member).
Xu, Fusheng. "Investigating flame-based synthesis of carbon nanotubes and metal-oxide nanowires." 2007. Doctoral Dissertation, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000054802.
Xu, Fusheng. "Investigating flame-based synthesis of carbon nanotubes and metal-oxide nanowires." 2007. Web. 23 Apr 2019.
Xu F. Investigating flame-based synthesis of carbon nanotubes and metal-oxide nanowires. [Internet] [Doctoral dissertation]. Rutgers University; 2007. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000054802.
14. Huang, Lei, 1983-. Optical whispering-gallery mode spectroscopy for the study of molecule adsorption and desorption.
Huang, Lei, 1983-. "Optical whispering-gallery mode spectroscopy for the study of molecule adsorption and desorption." 2011. Thesis, Rutgers University. Accessed April 23, 2019. http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063461.
Huang, Lei, 1983-. "Optical whispering-gallery mode spectroscopy for the study of molecule adsorption and desorption." 2011. Web. 23 Apr 2019.
Huang, Lei 1. Optical whispering-gallery mode spectroscopy for the study of molecule adsorption and desorption. [Internet] [Thesis]. Rutgers University; 2011. [cited 2019 Apr 23]. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063461.


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But when there is a global crisis, such as the one we're facing, the playbook we once relied on is suddenly out of date.
One of the most important elements of Covid-19 and its impact on society has been the emergence of predictive science. Estimating the spread of coronavirus and how it can be battled, its impact on communities and behaviour, the way the virus is changing the fabric of society.
And one of the most fascinating themes of such predictive science is trying to understand whether and how shifts in people's habits, attitudes, values and behaviours will endure. How the daily shortcuts we instinctively and subconsciously rely on, have altered. Such changes mean we need to be able to create modelling processes that will accurately record and predict the complex transformations that are already occurring.
Clearly, one of the most important things companies will need to do as they plan for a post-coronavirus world is attempt to predict the unpredictable. And, through that, get a better understanding of what truly influences the way we form, change and entrench our habits. Such modelling research will form the bedrock of the way companies rethink strategy and try to reflect and inspire their customers. If the future is different (and it almost certainly will be) we need to understand how far these habits – the daily personalised shortcuts that identify who we are and why we opt for certain brands – will be different too.
If we want to predict the unpredictable when it comes to habit and behaviour then we need to study, listen, learn and adapt. Not at some vague point in the future when things have calmed down, but now, in the maelstrom that's enveloping us when so much of life is both on ice and yet in flux too.
In essence, how we think and behave are driven by two different compulsions – our instant instincts and those driven by slower deliberation and logic. Instinctive habits are automatic – the lunchtime sandwich or fitness regime we're used to, for instance. They're triggered by cues in our environments such as time and place. And they satisfy our cravings for rewards. Habits don't require us to make too many awkward deliberations and drawn-out decision-making. Research suggests that 43 per cent of all that we do every day is performed out of habit. Plus, it takes, on average, 66 days for a new behaviour to become an automatic response – for it to turn into a system of cues, followed by the routine itself which sparks emotional and physical rewards.
So, some of the habits we formed pre-coronavirus and which have shifted during the pandemic will change – but brands need to identify which ones and by how much. Some will be short-term and thus potentially insignificant whilst others will be more profound and shape the way companies interact with loyal and new customers. The trouble is, how can we plan for a future if we are unsure what that future looks like?
Enormous sets of data have been essential in identifying things such as infection rates, herd immunity scenarios and how best to flatten the curve, so improved data collection and sharing can enhance projections of what's to come for business. Rather than make premature predictions, responsible companies should be trying to focus on improving the gathering, dissemination and interpretation of this data.
When it comes to scientific prediction research, most of the work that modelers have been doing so far in this epidemic is to characterise the epidemiology and try to estimate key parameters. Seeking to understand before trying to describe trends and suggest strategy. Once such numbers are pinned down, modelers can move onto what's called 'situational awareness' so as to understand the dynamics of a situation and interpret projections with greater accuracy.
Behavioural science provides a key to unlocking these conundrums because it focuses on what really matters when it comes to the way businesses interact with their customers – why people do the things they do and how those habits are buffeted by the winds of change.
To predict with greater accuracy, you need to consider multiple possible futures, evaluate their likelihood of actually occurring and determine the potential drivers and influences of them. You can then identify the actions you want to accelerate or mitigate against these possible futures. We are working with Mark Earls to create a predictive model that reflects this thinking, to help create more certainty and proactivity in this very uncertain world.
Jerome Hancock
Hall & Partners The Modellers
Hm-globe3
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redpajama_set_name: RedPajamaCommonCrawl


text:
Das Grenzrisiko () ist das größte, gerade noch vertretbare Risiko eines Risikoträgers.

Allgemeines
Risiken sind im Alltag allgegenwärtig. Ihre Risikoträger (Privatpersonen, Unternehmen, der Staat mit seinen Untergliederungen) müssen diese Risiken zunächst im Rahmen der Risikowahrnehmung überhaupt erkennen, einer Risikoanalyse und nachfolgenden Risikobewertung unterziehen, um sie danach mit ihren Zielen (persönliche Ziele bei Privatpersonen, Unternehmensziele bei Unternehmen und Staatsziele bei Staaten) zu konfrontieren. Sind die Risiken im Hinblick auf die Ziele zu hoch, müssen die Risikoträger Risikobewältigung betreiben. Das geschieht konkret durch Risikovermeidung, Risikominderung, Risikokompensation, Risikodiversifizierung, Risikoüberwälzung oder Risikovorsorge.

Das Grenzrisiko wird durch Gesetze und Vorschriften festgelegt, z. B. durch die Angabe von Grenz- oder Richtwerten.

Vertretbares Grenzrisiko
Sollen oder können diese Maßnahmen das vorhandene Risiko nicht völlig ausschalten, verbleibt das Grenzrisiko. Als Grenzrisiko bezeichnet man die allgemein akzeptierten Gefahren eines technischen Zustandes, Ereignisses oder Prozesses. Notwendige Risikobewältigung führt zum Grenzrisiko, darüber hinausgehende Risikobewältigung zum Restrisiko. Das Restrisiko ist also stets kleiner als das Grenzrisiko. Ist das vorhandene Risiko dagegen größer als das vertretbare Grenzrisiko, liegt eine Gefahr vor.

Da beispielsweise ein gewisses Brandrisiko in keinem Gebäude auszuschließen ist, muss für jedes Bauwerk ein noch zu akzeptierendes Risiko als Grenzwert oder Grenzrisiko festgelegt werden, um damit eine Brandsicherheit für ein Gebäude in dessen spezieller Nutzung festlegen zu können. Eine genügende Brandsicherheit liegt demnach stets dann vor, wenn das vorhandene Risiko das noch zu akzeptierende Grenzrisiko nicht übersteigt.

Wirtschaftliche Aspekte
Akzeptiert wird ein Risiko dann, wenn die Kombination aus Eintrittswahrscheinlichkeit und Schwere des Schadens dem Risikoträger erträglich erscheint. Ergibt sich aus der Risikobewertung, dass das verbleibende Restrisiko größer ist als das größte vertretbare Grenzrisiko, muss eine weitere Risikominderung vorgenommen werden. Technische Sicherheit liegt nach DIN 31004 (1982-11, Teil 1) erst vor, wenn das Risiko kleiner als das größte noch vertretbare anlagenspezifische Risiko eines Vorgangs oder Zustands (Grenzrisiko) ist. Ist das vorhandene Risiko  größer als das Grenzrisiko , liegt eine Gefahr  vor:
,
Sicherheit  ist entsprechend vorhanden, wenn
.
Die Sicherheit beginnt technisch und wirtschaftlich erst unterhalb des Grenzrisikos und ist am höchsten, wenn gar kein Risiko mehr vorhanden ist.

Das verbleibende Grenzrisiko muss für den Risikoträger vertretbar und tragbar sein, die Risikotragfähigkeit darf nicht beeinträchtigt werden. Die Vertretbarkeit von Risiken hängt von der Risikoeinstellung des Risikoträgers ab. Während der Risikofreudige höhere Grenzrisiken in Kauf zu nehmen bereit ist, neigt der Risikoscheue zu geringeren Grenzrisiken.

Abgrenzung
Ein Risiko, das nicht  mehr durch technische Maßnahmen ausgeschlossen werden kann, wird als Restrisiko bezeichnet.

Einzelnachweise

Betriebswirtschaftslehre
Risikomanagement
Risiko

redpajama_set_name: RedPajamaWikipedia


text:
Windows 11, Windows 10 Tips, Tricks, How to, and Guides
The ultimate stop for guides on Windows 11, Windows 10, and the previous version of Windows. Right from upgrading Windows to all the small tips and tricks, you need to manage your Windows PC
Fix: Printer Status is Paused; Cannot Resume
How To Make Windows 11/10 PC Boot Faster
Best Tips to Personalize Windows 11 PC
Windows Nayan Roy
Windows 11 comes with a new look and feel. The taskbar now sits in the middle, the settings page is completely changed, and there are many other changes that you get...
How to Stream Videos from Microsoft Edge to Xbox /Smart TV/DLNA/Miracast Devices
When watching a video on Microsoft Edge, if you want to stream it to Xbox, your Smart TV, or any DLNA/Miracast enabled device, this guide will help you do that. The...
Microsoft Edge Tips to Get You Started (Beginner's Guide)
Without any doubt, Microsoft Edge is a pretty powerful browser and a great alternative to Google Chrome. It has many excellent features and offers you a smooth browsing experience. However, if...
How To Edit Videos In The Windows Photos App
Windows Ojasv Jain
Windows 11/10 latest features have already made our life easy, where you feel connected to the world with a simple click. If you want to edit videos using the Photo App,...
Ten Best Email Clients for Windows 11/10
The best email client for Windows is essential if you have multiple email addresses and receive many emails each day. When choosing the best email clients for Windows, you should first...
How to Fix Corrupt Windows User Profile
Trying to login into your Windows user account but getting errors like user profile cannot be loaded? If yes, then this means that your user profile is corrupted. As a result,...
How to Add Family Member Account on Windows 11/10
Windows comes with solid support for Family & Kids Features, allowing you to manage them on the same PC or another PC. If you want to enable Family Member access on...
How To Auto Kill Not Responding Programs in Windows 11/10
It's common for a program to hang in Windows. Sometimes it's because of a lack of resources. Sometimes it's just there and becomes inaccessible. While you can kill them using the...
How To Find What Version of Windows Do I Have?
The need to know what Windows version we are running is pretty rare. However, when it comes to upgrading your PC or installing a game or software, you might want to...
How to Switch Users in Windows 11/10
Windows supports multi-user. As a result, a single computer can be used by different users, and they will have their files and programs separated from the other users. But there are...
How to Defer, Pause or Delay Updates in Windows 10
How to Install & Customize Themes in Windows 10
How to fix Ethernet connection in Windows 10
How to change purchase sign-in settings for the Microsoft Store


text:
Q: How to use dlmwrite in matlab to export pixels in R,G,B format? Right now when I export my image using dlmwrite:
dlmwrite('testy2.txt', A, 'delimiter', '\t')

I get something like this
0   31  255 251 255 255 255 255 255 255 255 255 255 255 255

This is difficult to work with and visualize and I was wondering if there was a way to separate this into the format:
0,31,255    251,255,255    255,255,255  255,255,255    255,255,255

with tabs in between each R,G,B value
How do I do this either when I'm exporting in MATLAB?

A: You'll want to use fprintf rather than dlmwrite to create a custom output like that. We can use the format specification of %d,%d,%d\t to create three numbers separated by a comma followed by a tab and this will be repeated for all values in A.
fid = fopen('testy2.txt', 'w');

fprintf(fid, '%d,%d,%d\t', A);

fclose(fid);

redpajama_set_name: RedPajamaStackExchange


text:
FRIDAY FUN – June 12, 2020
And now it's time for FRIDAY FUN!
Love from pets, music from the Golden Gate Bridge, and prisoners take a leave of absence.
In Rome, Italy, two inmates at a prison escaped, but they said they'll be back. Before they escaped, they left a note in their cell explaining they had personal reasons for needing to flee, said the Repubblica daily, according to the AFP. They were driven by "the need to protect their children from a nasty business they had got themselves into," the daily said, paraphrasing the contents of the letter. The inmates said they were needed to address the situation, as their wives were also in jail. The two promised to return in about 15 days once everything was sorted, the paper said. The men were serving sentences until 2029 for non-violent crimes.
Love from pets. If you can't view the below video, try https://youtu.be/5xpvEuOxyxE.
In San Francisco, the Golden Gate Bridge now "plays music" for the surrounding area, but residents are not describing it as melodious. The city's help line says the noise―variously described as a whistle, hum, howl or even scream―is caused by "high winds blowing through the newly installed railing slats along the bike path on the bridge." A spokesman for the Golden Gate Bridge, Highway and Transportation District told the local public radio station, "The new musical tones coming from the bridge are a known and inevitable phenomenon that stem from our wind retrofit during very high winds." He said the retrofit is "necessary to ensure the safety and structural integrity of the bridge for generations to come."
If you can't view the below video, try https://youtu.be/-iyYFd_Exuo.
« Equity Compensation as a Way to Help Employees Build Wealth


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When it comes to standing comfort, small adjustments can make a big difference! The 3M™ Precision Standing Desk provides maximum adjustability to achieve your most comfortable standing work position. Side-mounted levers controlling gas assist height change technology allows for continuous height settings from 6.2" to 20" above the desk surface. The keyboard surface has tilt adjustment range of -10◦/+10◦ to help achieve most comfortable typing position. The 3M™ Precision Standing Desk also includes a 3M™ Gel Wrist Rest and Precise™ Mouse Pad for added comfort and productivity.
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3M has a family of Ergonomic Mice, Mouse Pads and Wrist Rests that help you keep your hands and wrists in a neutral position and offer innovative features, such as soothing gel-filled wrist rests with antimicrobial protection, and Precise™ Mousing Surfaces that extend battery life of wireless mice up to 50% that extend comfort throughout the day. * Gel-filled wrist with antimicrobial protection inhibits the growth of microorganisms, such as bacteria, on the product surface, that can cause stains, odors, and product degradation.
Keep your work space and work tools clean, disinfected and organized with 3M™ Cleaning Solutions and Office Organizers so you can focus on the task at hand.
Keep login credentials, payroll information and other sensitive data private with 3M™ Privacy Products. Innovative technology prevents viusal hackers from stealing sideways glances at your screens, while providing you with a clear view. Available for monitors, laptops, tablets and smart phones.
Choose the keyboard tray that's right for you.
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Sturdy all-in-one platform minimizes bouncing.
3. Where are you sitting?
Determine the track length you need for your workstation.


DiamondSerenna sweetyprincess1 jasmin. SweetCattt. SexySweetDiamond. SkylarBoyer.
budiskaJoeyJordanKissingLoriAnabelleSky .PerfectMature42BLONDL0LAAdelleRowewhitechocolate8 .SwissMatureSweetyTynasexyboyfriendxuDanielaBlondie .AkiraSquirtsStan9inchTenderXCookieLolaMae .2ExoticGoddessesILoveSugarsexxxmatesAlexSweetCake .LolaCakesSweetCatttLinaSugarSoftGloria .AlexSweetCakeJoeyJordanCutieBootyXBestforWomen .leonardienteLitzyMchaleMelissaHiltonPerfectMature42 .CheshireKatMDesireXYummyGingerTenderXCookie .1RubyAndDrakeCplYoungClarasexyboyfriendxuCutieBootyX .YourHotDestinyZackandJonesConsuela88bellaMelisaCrystal .
LucioRichass1yourman1SexySweetDiamondCutieBootyX .1RubyAndDrakeCplAdelleRowe2ExoticGoddessessexyboyfriendxu .sexy6jessieLolaMaeEXOTICAxZYRAStan9inch .0hotjulie0sexyboyfriendxuYummyGingerAlittaBright .SexySweetDiamonddannyhotcum20handsomeguyalLeonJames .TenderXCookieSkylarBoyerILoveSugarSweetyTyna .CheshireKatLoveMeTenderrrXbadninasexy6jessie .LitzyMchaleJoeyJordanAlexSweetCakesexy6jessie .LunaSweet1LoriKimbudiska1yourman1 .LolaMaeSwissMatureleonardienteLucioRichass .AlexSweetCakeLolaMaeSweetyTynaSkylarBoyer .


text:
require_relative "../shared/logging_module"
require_relative "./services"

require "xcode/install"

module FastlaneCI
  # Manages Xcode installations
  class XcodeManagerService
    include FastlaneCI::Logging

    # Keeps an a hash, the key being the Gem::Version of the Xcode version we're installing
    # and the value being the % of the download progress
    attr_accessor :installing_xcode_versions

    # @return [AppleID] The Apple ID to use to install Xcode
    attr_reader :apple_id

    # @param user [String]: the email address / username of the Apple ID to use
    def initialize(user: nil)
      user ||= ENV["XCODE_INSTALL_USER"] # if the server is launched with this ENV variable

      use_apple_id(user: user)

      @installing_xcode_versions = {}
    end

    # Change the Apple ID to be used, you have to pass either `apple_id` or `user`
    # @param apple_id [AppleID]
    # @param user [String]
    def use_apple_id(apple_id: nil, user: nil)
      # use the user (email) to identify to make sure the account is
      # persisted and can be used
      user ||= apple_id.user if apple_id

      @apple_id = Services.apple_id_service.apple_ids.find { |a| a.user == user } if user
      if self.apple_id.nil?
        # Think about the user flow on how this would be shown, we probably want to check
        # for the existance of the Apple ID earlier, and then not even show the button,
        # or make the button redirect to the Apple ID login instead
        logger.error("No registered Apple ID found with user #{user}, make sure to add your " \
                     "Apple account to fastlane.ci")
        return false
      end
      return true
    end

    # A shared reference to the `XcodeInstall::Installer` object we use
    def installer
      if @_installer.nil?
        @_installer = XcodeInstall::Installer.new
      end
      # @_installer.rm_list_cache

      return @_installer
    end

    def xcode_queue
      @_xcode_queue ||= TaskQueue::TaskQueue.new(name: "fastlane.ci Xcode queue")
    end

    # @return [XcodeInstall::Xcode]
    #   <XcodeInstall::Xcode:0x007fa1d451c390
    #     @date_modified=2015,
    #     @name="6.4",
    #     @path="/Developer_Tools/Xcode_6.4/Xcode_6.4.dmg",
    #     @url=
    #      "https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_6.4/Xcode_6.4.dmg",
    #     @version=Gem::Version.new("6.4")>,
    #
    # the resulting list is sorted with the most recent release as first element
    def available_xcode_versions
      apple_id_credentials_block do
        installer.seedlist.reverse
      end
    end

    # @return [XcodeInstall::InstalledXcode]
    #   <XcodeInstall::InstalledXcode:0x007fc77c00f0a0
    #     @path=#<Pathname:/Applications/Xcode.app>,
    #     @bundle_version="9.2">
    #
    # Make sure to always use `.bundle_version` and not `.version`
    #
    # More methods available, like `available_simulators` and `uuid`
    def installed_xcode_versions
      return installer.installed_versions
    end

    # Switches to a given Xcode version by setting the DEVELOPER_DIR environment variable
    def switch_xcode_version!(xcode_path:)
      # It's save to say that DEVELOPER_DIR is fully managed by fastlane.ci
      # and we don't respect the user setting their own
      ENV["DEVELOPER_DIR"] = xcode_path.to_s if xcode_path
    end

    # Call this after calling `switch_xcode_version!`
    # after finishing the build
    def reset_xcode_version!
      ENV.delete("DEVELOPER_DIR")
    end

    # Run `xcode-select-p`, makes testing possible
    def xcode_select_p
      `xcode-select -p`.strip
    end

    # @return [String] The path to the currently selected Xcode
    #   e.g. "/Applications/Xcode9.2.app"
    def current_xcode_path
      path = ENV["DEVELOPER_DIR"] if ENV["DEVELOPER_DIR"].to_s.length > 0
      path ||= xcode_select_p

      # When using `xcode-select -p` the output ends with "Contents/Developer" for legacy reasons
      path = File.expand_path("../..", path) if path.end_with?("Contents/Developer")

      return path
    end

    # @return [XcodeInstall::InstalledXcode] of the currently selected Xcode
    def current_xcode
      return XcodeInstall::InstalledXcode.new(current_xcode_path)
    end

    # Detect the current Xcode version
    # @return [Gem::Version] e.g. `Gem::Version.new("9.2")`
    def current_xcode_version
      return Gem::Version.new(current_xcode.fetch_version)
    end

    def apple_id_credentials_block
      # There is no public interface in xcode-install to pass the Apple ID credentials
      # So we use environment variables to pass both the username, and the password
      ENV["XCODE_INSTALL_USER"] = apple_id.user
      ENV["XCODE_INSTALL_PASSWORD"] = apple_id.password

      yield
    ensure
      ENV.delete("XCODE_INSTALL_USER")
      ENV.delete("XCODE_INSTALL_PASSWORD")
    end

    # ###############################
    # Everything around installation
    # ###############################

    # Install a specific version of Xcode on the current machine
    # success_block is only called when no exception occured
    # only either error_block or success_block will be called
    # @param version [Gem::Version]
    def install_xcode!(version:, success_block: nil, error_block: nil)
      raise "Please only pass `Gem::Version` to `install_xcode!`" unless version.kind_of?(Gem::Version)

      apple_id_credentials_block do
        unless installer.exist?(version)
          raise "Xcode version '#{version}' is not available in the list of Xcode versions: " \
                "#{available_xcode_versions.map(&:version).join(', ')}"
        end
      end

      if installing_xcode_versions[version]
        raise "Xcode version #{version} is already being downloaded... Download couldn't be started"
      end

      logger.info("#{version} is available to be installed... putting installation process on the queue")
      # TODO: Check if installing a given Xcode version is already in the queue
      #       if it is, we need a way to append the `success` block to it

      install_xcode_task = TaskQueue::Task.new(work_block: proc {
        # There is no public interface in xcode-install to pass the Apple ID credentials
        # So we use environment variables to pass both the username, and the password
        ENV["XCODE_INSTALL_USER"] = apple_id.user
        ENV["XCODE_INSTALL_PASSWORD"] = apple_id.password
        begin
          apple_id_credentials_block do
            installer.install_version(
              # version: the version to install
              version,
              # `should_switch` is false, as we handle it on the fastlane.ci side of things, also
              #  this will create aliases which we don't need
              false,
              # `should_clean` is true, as we don't need to keep old DMG files around
              false, # false for now for faster debugging
              # `should_install` is true, as we want to not only download, but also install this version
              true,
              # `progress` We pass the custom `progress_block` instead, we don't want to show the
              #           download progress in stdout
              false,
              # `url` is nil, as we don't have a custom source
              nil,
              # `show_release_notes` is `false`, as this is a non-interactive machine
              false,
              # `progress_block` be updated on the download progress
              proc do |percent|
                installing_xcode_versions[version] = percent
              end
            )
          end
          logger.info("Successfully finished Xcode installation of version #{version}")
          success_block.call(version) if success_block
        rescue StandardError => ex
          # Handle and show error here
          logger.error(ex)
          logger.error(ex.backtrace)
          error_block.call(version, ex) if error_block
        ensure
          installing_xcode_versions.delete(version)
          ENV.delete("XCODE_INSTALL_USER")
          ENV.delete("XCODE_INSTALL_PASSWORD")
        end
      })

      xcode_queue.add_task_async(task: install_xcode_task)

      # Reference the task with the Xcode version
      installing_xcode_versions[version] = 0
    end
  end
end

redpajama_set_name: RedPajamaGithub


Jumeirah Palm Island luxury villas are seen by their private beaches in Dubai, United Arab Emirates, June 6, 2018. A new report released Tuesday, by the Washington-based Center for Advanced Defense Studies, relying on leaked property data from the city-state, described Dubai's real-estate market as a haven for money launderers, terror financiers and drug traffickers sanctioned by the U.S. in recent years.
The report by the Washington-based Center for Advanced Defense Studies, relying on leaked property data from the city-state, offers evidence to support the long-whispered rumors about Dubai's real-estate boom. It identifies about $100 million in suspicious purchases of apartments and villas across the city of skyscrapers in the United Arab Emirates, where foreign ownership fuels construction that now outpaces local demand.
For its part, the center known by the acronym C4ADS said Dubai has a "high-end luxury real estate market and lax regulatory environment prizing secrecy and anonymity above all else." That comes as the U.S. warns that Dubai's economic free zones and trade in gold and diamonds poses a risk.
Billboards advertise luxury villas and apartments in Dubai, United Arab Emirates, June 6, 2018.
The properties in question include million-dollar villas on the fronds of the man-made Palm Jumeirah archipelago to an apartment in the Burj Khalifa, the world's tallest building. Others appear to be one-bedroom apartments in more-affordable neighborhoods in Dubai, the UAE's biggest city.
Makhlouf and his brother, also sanctioned by the U.S., own real estate on the Palm Jumeirah, according to the report. They also have ties to two UAE-based free-zone companies. The UAE, a federation of seven sheikhdoms led from oil-rich Abu Dhabi, has opposed Assad in his country's yearslong war.
The UAE also opposes Hezbollah, the Lebanese political party and militia group backed by Iran. However, C4ADS' report identified at least one property directly linked to Lebanese businessmen Kamel and Issam Amhaz, who the U.S. sanctioned in 2014 for helping Hezbollah "covertly purchase sophisticated electronics" for military drones. The report identified another nearly $70 million in Dubai properties owned by two other shareholders in Amhaz's sanctioned firms.
Separately, the report identified about $21 million in real estate still held by individuals associated with the Altaf Khanani money laundering organization, a Pakistani ring that aided drug traffickers and Islamic extremists like al-Qaida through its currency exchange houses.
The report identified Dubai properties owned by Hassein Eduardo Figueroa Gomez, a Mexican national indicted in the U.S. for importing mass quantities of chemicals needed to make methamphetamine. It also identified properties owned by two Iranians previously sanctioned for their work on Iran's missile program.
FILE - The Trump International Golf Club main entrance in Dubai, United Arab Emirates, Dec. 20, 2016.
Dubai, an Arabian Peninsula entrepot, long has been a favorite port of call for those skirting the law. Gold smuggling into India served as one of the emirate's most lucrative trades for the decades after the pearling industry collapsed. Guns, drugs and other illicit cargo also moved through the city-state.
Over time, however, Dubai itself became a haven. The emirate's decision in 2002 to allow foreign ownership of so-called "freehold" properties drew a rapid construction boom that attracted developers from across the world, including President Donald Trump, whose name is on two golf course projects and villas.
Money quickly flowed in from all corners, especially those now involved in the U.S. wars in Afghanistan and Iraq, likely topping that.
From Kabul, the Afghan capital, more than $190 million in physical cash left for Dubai in three months in 2009 on commercial flights, according to an October 2009 U.S. diplomatic cable published by WikiLeaks. In 2008, some $600 million, as well as 100 million euros and 80 million British pounds, made the trip, according to the cable.
A banking scandal in Afghanistan in 2010 saw regulators demand that a banker turn over 18 Palm Jumeirah villas and two business properties. The brother of former Afghan President Hamad Karzai also profited from the sale of a Palm Jumeirah villa at the time.
In Pakistan, authorities believe citizens invested $8 billion in Dubai's property market over four years, possibly to evade taxes, officials said in 2017. Alleged Australian drug kingpins arrested in Dubai last year also owned real estate in the city, while the governments of Nigeria and South Africa also have launched investigations into alleged money laundering involving Dubai.
Unlike in the U.S., where property records are public, Dubai does not offer an accessible database of all its transactions, instead requiring specific details only individual buyers and sellers would have. C4ADS said it relied in part on "private UAE data compiled by real estate and property professionals" offered by a confidential source for its reporting.
The U.S. State Department as recently as this year issued a warning about money laundering in the UAE in its annual International Narcotics Control Strategy Report, noting the country's money-exchange shops can allow for "bulk cash smuggling." The UAE's economic free zones, real estate sector and its trade in gold and diamonds also pose risks.


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text:
DR. PAUL M. D'AMICO
Livingston Manor, NY
Dr. Paul M. D'Amico of Livingston Manor, NY passed away on Tuesday, December 29, 2015. He was 81.
The son of the late John D'Amico and Lucy (Lorino) D'Amico, he was born on July 20, 1934 in Livingston Manor. Dr. D'Amico had a lifelong devotion to helping others through his counsel.
After earning his pre-med degree from Georgetown University, he obtained a master's degree from Columbia University and then attained his medical degree from Chicago College of Osteopathy. While fulfilling his medical residency in Muskegon MI, he met his beloved wife, Barbara (Christian) D'Amico, of more than 45 years who predeceased him in 2007. They then returned to Livingston Manor to establish his medical practice and raise a family. In addition to serving the community as a general practitioner, he became a pioneer in the field of drug and alcohol addictions, helping countless patients arrest their addictions and go on to fulfilling lives. He created and directed detox programs at multiple hospitals, lectured and wrote profusely on the subject, and published two books in this field.
Dr. D'Amico served as President of the Livingston Manor School Board, President of the local Italian-American club, was a member of the local Lion's Club, and was active in several other groups that spanned his diverse interests. He was an avid outdoorsman who loved fishing, hunting and hiking. He loved to be surrounded by family and, above all, Dr. D'Amico was deeply religious and devoted to his traditional Catholic roots.
In his last years, Dr. D'Amico resided in central Maine to be close to family. He suffered for many years and ultimately succumbed to Parkinson's Disease.
Dr. D'Amico is survived by his children: John F. D'Amico and his wife, Katherine of Belgrade ME, Paul M. D'Amico and his wife, Christine of Greenwich CT, Mark A. D'Amico and his wife, Carmen of East Meredith NY, Lisa Michalowsky and her husband, Esteban of Lew Beach NY, and Sara Jakob and her husband, Claus of Germany. He is also survived by his sister, Mary Ann Finkelstein; many grandchildren, nieces and nephews.
Visitation will be held from 3 to 6 p.m. on Sunday, January 3rd at the Colonial-Bryant Funeral Home in Livingston Manor. A funeral service will be held at 10 a.m. Monday, January 4 at the funeral home followed by a Christian burial at the Lew Beach Cemetery. Father Joseph Collins will officiate.
Arrangements are under the direction of Colonial-Bryant Funeral Homes; for further information please call 845-439-4333 or visit www.colonialbryantfuneralhome.com


Girl is NOT a 4 Letter Word: Who's Rad. Gracie Earl.
This is a new feature we are doing on girls who skate. There are a lot of you girls out there skating everyday and making it happen - with sponsors, without sponsors, riding bowls, vert, street, downhill, longboards, cruisers or backyard ramps. Some of you are lucky enough to ride with other girls each day, some of you are the only girl in a pack full of boys. Some of you like contests and compete as often as you can, some of you girls are "soul skaters" and you shun competing.
Favorite Trick: I don't really have a favourite, I love doing everything!


text:
COVID-19 Restrictions: Please read these important instructions before attending
FAC Licensing & Applications
Ron Villiers
Well as you will all probably now know, Ron Villiers – one of the founding members of the Warwickshire Armourers Rifle & Pistol Club – passed away on 21st April 2015.
If you have been a member of the club for more than 2 years you will have known Ron. He was the one standing by a car, boot open selling ammo, range book in his hand – and telling you that you were late and that he'd been there before the range Warden was!! – but that was Ron. He was the face and voice on the range, the face and voice at the AGM and of course the committee meetings. Indeed, he was the face and voice of the WAR&PC for the last 35 years that I have been a member.
Ron worked tirelessly for the club in numerous jobs – membership secretary, armourer, Police Liaison Officer and also as a Range Conducting Officer and he attended every shoot. He was known to many as 'Wrinkly Ron' with his lack of teeth, wide grin, peaked cap and waxed jacket and was the first sight that greeted everyone on a shoot. He was always ready to give you 'helpful' advice (whether you wanted it or not) and as the years passed I enjoyed the banter with him, telling him that he was 'a moaning old fart' that couldn't shoot, then waiting for his very unrepeatable reply! But Ron could shoot – very well indeed and in all disciplines.
A full committee and several members of the WAR&PC attended his service at Kingsbury Church, along with his family and many friends. It was a delightful service (not sure if that word is appropriate when applied to a funeral…..but it was!) with a memorable eulogy written by his good friend Alan Long and read by a Vicar who put the emphasis on a long life, lived to the full. He was laid to rest in his spiritual home in sight of Kingsbury Ranges – no more fitting a resting place could have been found. We all retired to The Gate pub which had laid on a fine spread and Michelle his daughter (much to the amusement of everyone) had put photographs of Ron around the room, doing what he liked best, shooting! This, of course, brought forth many more stories of happier times spent with Ron on the range. It was a fitting end to what had been a sad but memorable day. I think Ron would have been very proud.
Many would have thought that Ron was a strong willed character that wanted things done his way. In many ways that was true – and he didn't suffer fools gladly – but he was a very good friend to many and would show his support when necessary. The club he founded nearly 50 years ago is still going strong, with a bright future. It will give many members solace in the thought that Ron is still in sight and hearing distance of the range where he spent many happy hours with us all – R.I.P Ron you are already sadly missed by all.
I would like to take this opportunity to offer my personal condolences, that of the committee and indeed all the club members, to his family and friends for their loss…..and especially to Michelle his daughter, who had the added burden of care in his last few months, whilst also trying to balance work and home.
David R. Tomkinson
About WARPC
Warwickshire Armourers Rifle and Pistol Club shoot three to five times a month at either Kingsbury or Whittington MoD ranges, at distances from 25m up to 600m and at Sennybridge Range, 100m out to 1500m.
Club Affiliation
N.R.A. Affiliation No. 960.
www.nra.org.uk
membership@warpc.org
© WARPC | Website by stu-art design


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Alexander Abramovich Krein (; 20 October 1883 in Nizhny Novgorod – 25 April 1951 in Staraya Ruza, Moscow Oblast) was a Soviet composer.

Background
The Krein family was steeped in the klezmer tradition; his father Abram (who moved to Russia from Lithuania in 1870) was a noted violinist. All of the seven Krein brothers received their first musical training from him and became musicians; Alexander and Grigori made names for themselves as composers, David gained a strong reputation as a violinist. Of the three Krein family composers, Alexander, his brother Grigori, and Grigori's son Julian, it is Alexander who composed the most music and thus to whom the most attention has been paid. After decades of posthumous neglect, however, his very name seems to have disappeared from international reference books.

Studies and career
In 1896, at the early age of 14, Alexander Krein entered the Moscow Conservatory where his studies included cello classes with Alexander von Glehn and composition lessons with Sergei Taneyev and Boleslav Yavorsky. His first works were published by P. Jurgenson in 1901. During the years immediately prior to the 1917 Revolution, he was on the faculty of the People's Conservatory in Moscow. In 1917, he was appointed as director of the artistic wing of the  Muzo-Narkompros, the music section of a newly formed ministry of arts and education. Throughout the 1920s, Krein was widely regarded as the leader of a Jewish national school in Russia (which included his brother Grigori and his nephew Julian). Among those he influenced were minor composers such as Sinovii Feldman.  After the formation of the Soviet Union, he held a variety of official and semi-official music administration posts. He died April 1951 in Staraya Ruza. His son, Alexander Kron, was a Soviet playwright.

Style
Krein's pioneering spirit had led him to incorporate the intonations and styles of both sacred and secular Jewish music into a relatively advanced idiom that was as influenced by  French impressionism as it was by the music of his friend Alexander Scriabin.
Krein's own Jewish heritage was a constant source of inspiration; there are a number of instrumental works whose titles bear quite obvious witness to this, such as the Caprice Hebraique, Op. 24, and the Jewish Sketches for clarinet and string quartet. In 1921, he composed Kaddish for tenor soloist, choir, and orchestra.  From the mid-'20s on, he also wrote music for plays given by Moscow's Jewish Drama Theater.  There is also a large amount of music that is either purely classical in design or Soviet in nature. In the latter category are works like the revolutionary opera Zagmuk (1930), the Threnody in Memory of Lenin (1925), and the somewhat amusingly titled U.S.S.R., Shock Brigade of the World Proletariat (1925).

Selected works
 Prologue for viola and piano, op. 2a (1902–1911/1927)
 Five Préludes for piano, op. 3 (1903–1906)
 Poème Quator for string quartet, op. 9 (1909)
 Jewish Sketches for clarinet and string quartet, op. 12 (1914, reprinted 2008 by Edition Silvertrust)
 Elegy for violin, cello and piano, op. 16 (1913)
 3 Lieder des Ghetto (3 Songs from the Ghetto) for soprano and piano, op. 23
 Sei mir Schwesterlein (1916)
Wo bist du? (1917)
Eine Träne (1915–1916)
 Caprice Hébraïque, op. 24 (1917)
 Kaddisch, Symphonic Cantata for tenor, mixed choir and large orchestra, op. 33 (1921–1922)
 Symphony No.1 for large orchestra, op. 35 (1922–1925)
 Piano Sonata (1925)
 2 Hebräische Lieder (2 Hebrew Songs) for voice and piano, op. 39 (1926)
 Trauer-Ode to Lenin for Mixed Choir and large orchestra, op. 40 (1925–1926)
 Aria for violin and piano, op. 41 (1927)
 2 Pieces on Turkish Themes, for solo piano Op.46 (1941)
 Ornamente (Орнаменти, Три песни без слов), 3 Songs without Words for voice and piano, op. 42 (1924/1927)
 Jewish Melody for cello and piano, op. 43 (1928)
 Zagmuk, opera (1929–1930)
 Laurencia, ballet (1939)

References

External links
 Alexander Krein 3 Sketches on Hebrew Themes for Clarinet Quintet, Op.12 Soundbites and discussion

1883 births
1951 deaths
Musicians from Nizhny Novgorod
People from Nizhegorodsky Uyezd
Russian Jews
Soviet Jews
20th-century classical composers
Jewish classical composers
Russian opera composers
Male opera composers
Russian ballet composers
Russian male classical composers
Soviet composers
Soviet male composers
20th-century Russian male musicians
Moscow Conservatory alumni


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Q: How to extract a number value from a string containing CSS rules Given a string with a format similar to this:
"color: blue; padding: 10px 0; transition: all 1.5s;"

I would like to extract the number 1.5 (or whatever it is the number there).
I though that I could:
1) Split the string at the ";";
2) for each substring see if it contains "transition";
3) if it does, then extract the number.
The closest I could get was:
String.split("string", ";") |> Enum.map(fn(x) -> if Regex.match?(~r/transition:/, x) do
    String.replace(x, "transition: all ", "") end
    end

This isn't working and also by using String.replace I get two problems with this part: transition: all 1.5s:
1) I can't clean the trailing s;
2) I can have other text instead of just all;
So, how to do this work while solving these latter issues?

A: Regex.scan/3 and pattern matching result come to the rescue:
iex(1)> [[_, value]] = ~r{transition:.*?([\d.])s.*?;}
          |> Regex.scan("color: blue; padding: 10px 0; transition: all 1.5s;")
#⇒ [["transition: all 1.5s;", "1.5"]]
iex(2)> value
#⇒"1.5"

If you expect that string might or might not have a match:
case ~r{transition:.*?([\d.])s.*?;}
     |> Regex.scan("color: blue; padding: 10px 0; transition: all 1.5s;") do
  [[_, value]] -> value |> String.to_float
  _ -> IO.puts "Sorry, no match"
end
#⇒ 1.5


CHEST: Take measurement around fullest part of your bust.
WAIST: Measure around the narrowest part – bend to one side to see the natural crease.
HIPS: Measure around the fullest part of your hips with your feet together.
INSIDE LEG: Measure from top of inside leg to ankle bone.
Our Seamless styles are: Game On Tights, Sensation Tights, On Form Tights, Genius Vest and Warrior Zip Thru. The technical manufacturing process used for these styles means they are extra stretchy with lots of recovery. The size guide below should help if you are unsure which size to order.


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South Florida has more than just your average dining and entertainment!
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Baal Shem Tov, "Master of the Good Name," was the title given to Israel ben Eliezer (1698‑1760), founder of the Hasidic movement (Hasidism). The title (often abbreviated to Besht, after its initial letters) refers to the use, as in the Kabbalah, of various combinations of divine names ("names of God") in order to effect miraculous cures. Like other miracle workers of the time, the Besht was first known as a practitioner of white magic, but this aspect of his life is usually played down by the Hasidim, who prefer his role as spiritual master and guide to predominate.
We now know that the Besht lived in the town of Miedzyboz in Podolia for many years, where he received a handsome stipend from the Jewish community (thus giving the lie to the notion that Hasidism was anti‑establishment from its inception). In Miedzyboz there gathered around him a group of pneumatics out of which the new movement emerged. It has to be appreciated that at the time in Eastern Europe there were a number of charismatic leaders, of whom the Besht was only one. However, the Besht's teachings and way of life so influenced like‑minded followers that the other groups eventually vanished from the scene. Hasidism became Beshtian Hasidism.
It is also difficult to distinguish the original ideas of the Besht from those taught in later varieties of Hasidism. The sayings attributed to him in Toledot Yaakov Yosef, by his disciple Jacob Joseph of Polonoyye, and in Degel Mahaney Efrayim, by his grandson, Ephraim of Sudlikov, have an air of authenticity about them but come to us at second or third hand. The Besht stressed the divine immanence, contemplation of which is bound to fill the heart with religious joy and enthusiasm. In Israel Zangwill's essay "The Master of the Name" (in his Dreamers of the Ghetto) the Besht appears as a jolly coachman full of the love of life who strikes the narrator as a mere simple man of faith until he stands in prayer, lost in profound contemplation. Zangwill's portrait is not without value but ignores the numinous quality of life as perceived by the master.
The figure of the Besht became the prototype of the Hasidic Zaddik [wise man] and is treated in every variety of Hasidism with the utmost veneration, although, at the same time, he is seen as caring passionately for the well‑being of the Jewish people as the people of God. In later Hasidism, to tell the story of the Besht is itself a means of bringing down the divine grace from on high. The curious early Hasidic legend that the heavenly mentor of the Besht was Ahijah the Shilonite (I Kings 11:29‑39) is undoubtedly based on the need to link the novel ideas of the Besht to the Torah of Moses (according to rabbinic legend, Ahijah was present at the time of the Exodus as a contemporary of Moses and he lived on for hundreds of years).
Jewish mysticism has taken many forms.


text:
CT.CC.G.3.Geometry
G.3.1. Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.
Flip Charts Polygons
G.3.2. Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.
Flip Charts Adding & Subtracting Fractions
Flip Charts Fraction Concepts
Vocabulary Terms Add/Subtract Fractions
Vocabulary Terms Decimals/Fractions
Quiz, Flash Cards, Worksheet, Game & Study Guide Add/Subtract Fractions
Quiz, Flash Cards, Worksheet, Game & Study Guide Algebra
Quiz, Flash Cards, Worksheet, Game & Study Guide Decimals/Fractions
Quiz, Flash Cards, Worksheet, Game & Study Guide Number Line
Quiz, Flash Cards, Worksheet, Game & Study Guide Pattern Blocks
Quiz, Flash Cards, Worksheet, Game & Study Guide Probability
CT.CC.MD.3.Measurement and Data
Geometric measurement: recognize perimeter as an attribute of plane figures and distinguish between linear and area measures.
MD.3.8. Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.
Flip Charts Area, Volume & Perimeter
Flip Charts Dot to Dot
Vocabulary Terms Perimeter
Quiz, Flash Cards, Worksheet, Game & Study Guide Area and Perimeter
Quiz, Flash Cards, Worksheet, Game & Study Guide Perimeter
Geometric measurement: understand concepts of area and relate area to multiplication and to addition.
MD.3.5. Recognize area as an attribute of plane figures and understand concepts of area measurement.
MD.3.5(a) A square with side length 1 unit, called ''a unit square,'' is said to have ''one square unit'' of area, and can be used to measure area.
MD.3.5(b) A plane figure which can be covered without gaps or overlaps by n unit squares is said to have an area of n square units.
MD.3.6. Measure areas by counting unit squares (square cm, square m, square in, square ft, and improvised units).
MD.3.7. Relate area to the operations of multiplication and addition.
MD.3.7(a) Find the area of a rectangle with whole-number side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths.
MD.3.7(b) Multiply side lengths to find areas of rectangles with whole-number side lengths in the context of solving real world and mathematical problems, and represent whole-number products as rectangular areas in mathematical reasoning.
MD.3.7(c) Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of a x b and a x c. Use area models to represent the distributive property in mathematical reasoning.
Flip Charts Multiplying Two-digit Numbers
MD.3.3. Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories. Solve one- and two-step ''how many more'' and ''how many less'' problems using information presented in scaled bar graphs. For example, draw a bar graph in which each square in the bar graph might represent 5 pets.
Vocabulary Terms Tables and Graphs
Vocabulary Terms Represent Data
Quiz, Flash Cards, Worksheet, Game & Study Guide Tables and Graphs
Quiz, Flash Cards, Worksheet, Game & Study Guide Represent Data
MD.3.4. Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units-- whole numbers, halves, or quarters.
Flip Charts Customary & Metric Units of Measurement
Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects.
MD.3.1. Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.
Flip Charts All About Time
Quiz, Flash Cards, Worksheet, Game & Study Guide Calendar
MD.3.2. Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l). Add, subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.
CT.CC.MP.3.Mathematical Practices
MP.3.1. Make sense of problems and persevere in solving them.
CT.CC.NBT.3.Number and Operations in Base Ten
Use place value understanding and properties of operations to perform multi-digit arithmetic.
NBT.3.1. Use place value understanding to round whole numbers to the nearest 10 or 100.
Vocabulary Terms Rounding Numbers
Quiz, Flash Cards, Worksheet, Game & Study Guide Rounding Numbers
NBT.3.2. Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Vocabulary Terms Addition/Subtraction
Quiz, Flash Cards, Worksheet, Game & Study Guide Addition/Subtraction
Quiz, Flash Cards, Worksheet, Game & Study Guide Commutative/Associative Properties
Quiz, Flash Cards, Worksheet, Game & Study Guide Multi-step Word Problems
NBT.3.3. Multiply one-digit whole numbers by multiples of 10 in the range 10-90 (e.g., 9 x 80, 5 x 60) using strategies based on place value and properties of operations.
Vocabulary Terms Division/Multiplication
Quiz, Flash Cards, Worksheet, Game & Study Guide Division/Multiplication
CT.CC.NF.3.Number and Operations--Fractions
Number and Operations--Fractions
Develop understanding of fractions as numbers.
NF.3.1. Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.
Vocabulary Terms Add/Subtract Decimals
Quiz, Flash Cards, Worksheet, Game & Study Guide Add/Subtract Decimals
NF.3.2. Understand a fraction as a number on the number line; represent fractions on a number line diagram.
NF.3.2(a) Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line.
NF.3.2(b) Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.
NF.3.3. Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size.
NF.3.3(a) Understand two fractions as equivalent (equal) if they are the same size, or the same point on a number line.
NF.3.3(b) Recognize and generate simple equivalent fractions, e.g., 1/2 = 2/4, 4/6 = 2/3). Explain why the fractions are equivalent, e.g., by using a visual fraction model.
NF.3.3(c) Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers. Examples: Express 3 in the form 3 = 3/1; recognize that 6/1 = 6; locate 4/4 and 1 at the same point of a number line diagram.
NF.3.3(d) Compare two fractions with the same numerator or the same denominator by reasoning about their size. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with the symbols >, =, or <, and justify the conclusions, e.g., by using a visual fraction model.
CT.CC.OA.3.Operations and Algebraic Thinking
Solve problems involving the four operations, and identify and explain patterns in arithmetic.
OA.3.8. Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
Vocabulary Terms Problem Solving
Quiz, Flash Cards, Worksheet, Game & Study Guide Problem Solving
Multiply and divide within 100.
OA.3.7. Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 x 5 = 40, one knows 40 / 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.
Flip Charts Dividing Two-digit Numbers
Flip Charts Division Concepts & Strategies
Flip Charts Multiplication Concepts & Strategies
Flip Charts Multiplication Table
Vocabulary Terms Division
Vocabulary Terms More Multiplication
Vocabulary Terms Multiplication
Quiz, Flash Cards, Worksheet, Game & Study Guide Division
Quiz, Flash Cards, Worksheet, Game & Study Guide More Multiplication
Quiz, Flash Cards, Worksheet, Game & Study Guide Multiplication
Quiz, Flash Cards, Worksheet, Game & Study Guide Odd/Even
Understand properties of multiplication and the relationship between multiplication and division.
OA.3.5. Apply properties of operations as strategies to multiply and divide. Examples: If 6 x 4 = 24 is known, then 4 x 6 = 24 is also known. (Commutative property of multiplication.) 3 x 5 x 2 can be found by 3 x 5 = 15, then 15 x 2 = 30, or by 5 x 2 = 10, then 3 x 10 = 30. (Associative property of multiplication.) Knowing that 8 x 5 = 40 and 8 x 2 = 16, one can find 8 x 7 as 8 x (5 + 2) = (8 x 5) + (8 x 2) = 40 + 16 = 56. (Distributive property.)
Flip Charts Adding & Subtracting Number Sense
OA.3.6. Understand division as an unknown-factor problem. For example, find 32 / 8 by finding the number that makes 32 when multiplied by 8.
Represent and solve problems involving multiplication and division.
OA.3.1. Interpret products of whole numbers, e.g., interpret 5 x 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 x 7.
OA.3.2. Interpret whole-number quotients of whole numbers, e.g., interpret 56 / 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each. For example, describe a context in which a number of shares or a number of groups can be expressed as 56 / 8.
OA.3.3. Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.


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Vampiresa busca banquero sediento de sangre.
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Find an exhibition hall in Burlington on the iVvy Marketplace. We have thousands of rental venues that you can choose from, including everything from small marquees to large exhibition centers. iVvy makes this easy by allowing you to search for live availability of exhibition venues, request an onsite visit.
Once you have found your rental venue, you have the option to reserve the space and organize a site inspection. Burlington, Monmouth, Fort Madison, Mount Pleasant, Keokuk or Macomb exhibition venues will have a range of pricing options.


text:
Q: Can't call function from componentDidMount Inside componentDidMount() i'm checking firebase.auth to see if user has authenticated, if yes this should be calling multiple functions ("this.functionName()") however this doesn't work and results in yellow box: "[Unhandled promise rejection: TypeError: undefined is not an object (evaluating 'this.loadChallenge')]" They are located under the same class.
componentDidMount() {
        firebase.auth().onAuthStateChanged(function(user) {

      //if user exists
      if (user) {
        console.log('Auth triggered.')
        this.loadChallenge()
        this.activateListener(user.uid)

        console.log('User is logged in ... profile.')
      } else {
        console.log('Not signed in.')
      }
    });
  }

A: Use the "arrow function" syntax rather than function keyword to preserve the value of this for your callback function. So the function will have access to the methods on your component class.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions
componentDidMount() {
    firebase.auth().onAuthStateChanged(user => {

        //if user exists
        if (user) {
            console.log('Auth triggered.')
            this.loadChallenge()
            this.activateListener(user.uid)

            console.log('User is logged in ... profile.')
        } else {
            console.log('Not signed in.')
        }
    });
}