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The document summarizes research on producing Cu2ZnSnS4 (CZTS) thin films for solar cell applications using spray pyrolysis deposition. Key points: 1) CZTS thin films were successfully deposited using a simple and inexpensive spray pyrolysis technique involving spraying a precursor solution containing copper, zinc, tin, and sulfur compounds onto a heated substrate. 2) Characterization of the films showed that increasing thickness improved crystallinity, grain size, optical absorption in the desired 1.6-1.67eV range, and electrical conductivity. 3) The research demonstrated the spray pyrolysis technique can effectively produce CZTS thin films for solar cells in a single-step process without vacuums or
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CZTS (Cu2ZnSnS4) is a promising photovoltaic material due to its high absorption coefficient and suitable bandgap of ~1.45 eV. It has been studied in thin film solar cell configurations with conversion efficiencies as high as 8.4% reported. CZTS crystallizes in the kesterite structure and can be fabricated using methods such as evaporation, sputtering, electrodeposition, and sol-gel. These methods allow deposition of CZTS absorber layers with tunable optical and electrical properties for solar cell applications. However, efficiencies remain lower than for CIGS cells currently, and further work is needed to optimize CZTS material properties and device performance.
CZTS
This document summarizes a presentation about the synthesis of copper zinc tin sulfide (CZTS) nanocrystals. It introduces the topic, describes the practical synthesis method used, and analyzes the characterization of the synthesized CZTS nanocrystals through X-ray diffraction, Raman spectroscopy, absorption spectroscopy, and optical bandgap determination. In conclusion, it reviews the meaning and significance of the results.
Solar energy ppt
Solar energy is energy from the sun that can be converted into thermal or electric energy. Thermal energy from the sun is used for heating while electric energy uses photovoltaic cells to produce electricity. The document discusses the history of solar energy development and provides examples of practical solar energy applications today such as solar panels, vehicles, street lights, and water pumps. It also outlines the advantages of solar energy being renewable, sustainable, and reducing environmental impacts compared to fossil fuels. The high upfront costs of solar energy systems and dependence on sunlight availability are mentioned as disadvantages.
Sustainable energy ppt
1. The document discusses various renewable energy sources including solar energy, geothermal energy, wind energy, tidal energy, wave energy, hydroelectricity, and biomass.
2. It provides details on each source, outlining their advantages and disadvantages. For example, it notes that solar energy harnesses the sun's energy for electricity production while wind turbines convert kinetic energy from the wind.
3. The document emphasizes that renewable energy is important because it provides environmental benefits, empowers future generations, and lessens dependence on fossil fuels.
Presentation on solar cell
This document provides an overview of solar cell technology. It discusses the history of solar cells from their development in 1954 at Bell Laboratories to their use in satellites. It describes how solar cells work, converting sunlight into electricity using the photoelectric effect in semiconductor materials like silicon. The document outlines the benefits of solar cells as well as their applications and disadvantages.
Why Medical Mobile Markets?
Presentation by Kia Baker
IFFS Director of Food Recovery and Distribution
at Feeding America's Agency Capacity, Programs, and Nutrition Conference
Oct 2012
CIGS Solar cell
This document summarizes a research paper on using colloidal copper indium gallium selenide (CIGS) and copper zinc tin sulfide (CZTS) nanocrystals as precursors for printed photovoltaics. It discusses how the nanocrystals are synthesized and then deposited using spray deposition techniques, such as with an airbrush or robotic sprayer, onto flexible plastic substrates. This allows for precise thickness control and deposition over large areas. Initial efficiencies of CIGS solar cells made with this process were around 3.1% on glass and 2% on plastic but increased to over 12% after selenization at 500 degrees C to form Cu(In,Ga)(S,Se
How can thin-film PV meet the demands of Terawatt scale generation?
Talk delivered by team "Sunny Side Up" during CDT training module at University of Liverpool, Nov 2014
Donoway Sigma Xi Presentation 2015
The document summarizes research into using different surface morphologies of cuprous oxide (Cu2O) nanocrystals for solar cell applications. Nanocubes and nanooctahedrons were synthesized and characterized. Photoelectrochemical tests found that nanooctahedrons had increased photocatalytic activity and stability over nanocubes. Both nanocrystal types showed higher external quantum efficiency and solar cell efficiency than silicon-based cells. The results indicate that controlling nanocrystal morphology can optimize materials for inexpensive and efficient solar technologies.
Advanced energy management tools
IREMS is an energy management system that optimally manages generators, loads, and storage units in a microgrid. It works by (1) optimizing energy planning using forecasts and price data to minimize costs, and (2) balancing energy in real-time using measurements. IREMS allows different user types to interact with and control their assets. It offers advantages like automatic real-time control and optimization to reduce costs and emissions. The developer has experience implementing IREMS in labs and real sites.
IREC presentation part 01
This presentation was used in Euro Arab Training Course
“SMART GRID AND INTEGRATION OF RENEWABLE ENERGY”. The course took place 25 – 29 April 2016
TKP 4190
This master's thesis studied the spray pyrolysis of oxide materials like yttrium oxide (Y2O3) and europium-doped yttrium oxide (Y2O3:Eu3+) and how different chemical and process parameters affected powder characteristics. Specifically, it investigated the effects of using complexing agents like maleic acid and EDTA in the precursor solution and varying the solution feeding rate and carrier gas flow rate during spray pyrolysis. The study characterized the resulting powders in terms of properties like crystallite size, purity, morphology, and photoluminescence to determine how the preparation parameters influenced powder quality.
Solar and wind power forecasting
This presentation was used in Euro Arab Training Course
“SMART GRID AND INTEGRATION OF RENEWABLE ENERGY”. The course took place 25 – 29 April 2016
Scanning Electron Microscope- Energy - Dispersive X -Ray Microanalysis (Sem E...
Scanning Electron Microscope- Energy - Dispersive X -Ray Microanalysis (Sem E...Nani Karnam Vinayakam
The document discusses scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX or EDS) analysis. It provides details on:
- How an SEM works by scanning a sample with a focused electron beam and detecting signals from electron interactions with the sample.
- The components of an SEM including the electron gun, detectors for secondary electrons and backscattered electrons.
- How EDX analysis identifies elements by measuring the energy of X-rays emitted when electrons change energy levels.
- Parameters that affect EDX analysis such as count rate, accelerating voltage, and take-off angle.Uv visible spectroscopy- madan
This document discusses instrumental techniques of analysis, specifically visible and ultraviolet spectroscopy. It covers the basic theory of spectroscopy and how matter interacts with electromagnetic radiation. Key points include:
1. Spectroscopy involves studying the interaction of matter with electromagnetic radiation like light.
2. UV-visible spectroscopy measures absorption of samples when electrons are excited from ground state to excited state.
3. Beer's law and Lambert's law describe the relationship between absorbance, concentration, and path length of samples.
4. The combined Beer-Lambert law states absorbance is directly proportional to concentration and path length of the absorbing species.
Project plan tyre recycling plant
This document outlines the plans for constructing a scrap tire recycling plant in Maryland. It will utilize a pyrolysis process to break down tires into fuel oil, carbon black, steel wire, and gas. The plant aims to recycle 9 tons of tires per day. The project plan covers requirements, scheduling, budget, risk management, staffing needs, acquisition procedures, floor plans, and post-construction responsibilities. The work breakdown structure divides the project into project development, construction, tire recycling installation, and administrative departments.
uv -visible spectroscopy
UV-visible spectroscopy is a technique that uses light in the visible and adjacent ranges. It works by measuring how much light is absorbed by a sample at each wavelength.
The document discusses the basic principles of spectroscopy, including how electromagnetic radiation interacts with matter. It describes the laws of absorption, specifically Beer's law, which states that absorbance is proportional to concentration.
The key aspects of instrumentation are outlined, including light sources, wavelength selectors like monochromators, sample holders, and detection devices. Single beam and double beam spectrophotometers are explained as the main types of instruments used in UV-visible spectroscopy.
UV Visible Spectroscopy
This document provides an overview of UV-Visible spectroscopy. It discusses how UV radiation causes electronic transitions in molecules, which can be observed via absorption spectroscopy. The instrumentation used includes sources of UV and visible light, a monochromator to select wavelengths, and a detector. Samples are dissolved and placed in transparent cuvettes for analysis. Spectra are recorded as absorbances and show absorption bands corresponding to electronic transitions. UV-Vis is useful for structure elucidation and quantitative analysis.
Applications of IR (Infrared) Spectroscopy in Pharmaceutical Industry
1. Infrared spectroscopy can be used to qualitatively and quantitatively analyze compounds. It is used to identify unknown substances by comparing their IR spectra to reference standards.
2. The "fingerprint" region from 1200-700 cm-1 is particularly useful for identification because small molecular differences result in significant spectral changes in this region. Computer search systems can also identify compounds by matching IR spectra to profiles of pure compounds.
3. IR spectroscopy allows determination of molecular structures by identifying the presence or absence of functional groups from their characteristic absorption bands. It can also be used to study the progress of chemical reactions.
Fourier Transform Infrared Spectroscopy Ftir
A method of obtaining an Infrared spectrum by measuring the interferogram of a sample using an interferometer, then performing a Fourier Transform upon the interferogram to obtain the spectrum.
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How can thin-film PV meet the demands of Terawatt scale generation?
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OPTICAL CHARACTERISTICS OF PULSE PLATED CuInS2 FILMS
OPTICAL CHARACTERISTICS OF PULSE PLATED CuInS2 FILMSInternational Journal of Technical Research & Application
Copper indium sulphide films were deposited by the
pulse plating technique with different OFF times in the range of
5s – 30s and at a constant current density of 5 mA cm-2. The
films exhibited single phase copper indium sulphide. The grain
size increased with decrease of OFF time. Optical band gap of the
films increased from 1.44– 1.497 eV with decrease of OFF time.
Optical constants (refractive index, n, and extinction co-efficient,
k) of the films have been obtained in the wavelength range 800 -
1700 nm by using spectrophotometric measurement. The
obtained results concerning the absorption index yield the energy
gap in addition to the type of the allowed optical transitions.
N/m* ratio has been obtained from refractive index data. The
dispersion of refractive index is analyzed by using a single
oscillator model.Optical characterization of Se90S10-xCdx thin films
This document summarizes research on the optical characterization of Se90S10-xCdx thin films with varying concentrations of cadmium (Cd). Thin films were deposited via thermal evaporation and their structural, optical, and electrical properties were analyzed using techniques such as X-ray diffraction, differential thermal analysis, and spectrophotometry. The addition of Cd was found to decrease the refractive index and absorption coefficient compared to films without Cd. Optical bandgap, dielectric constant, and other optical parameters were estimated from transmission measurements and used to interpret the effect of localized electronic states within the amorphous semiconductor films.
Significance of substrate temperatures on the deposition of ZnGa2Se4 thin fil...
This document examines the effect of substrate temperature on the properties of ZnGa2Se4 thin films deposited by flash evaporation technique. The key findings are:
1) Films deposited between 573-673K were single phase, stoichiometric, and polycrystalline with preferred orientations, while films outside this range were non-stoichiometric or multi-phase.
2) Grain size and surface roughness increased with increasing substrate temperature from 573K to 673K.
3) Band gap energy was found to increase with increasing substrate temperature.
Sia.6888
This research article investigates the surface roughness and electrical conductivity of ultra-thin tin dioxide (SnO2) layers deposited by spray pyrolysis. Two sets of samples with different precursor concentrations and volumes were analyzed using X-ray reflectivity. XRR analysis revealed that increasing the precursor volume led to thicker layers with higher electron densities. Higher precursor concentration resulted in denser layers with larger thicknesses. Sheet resistance measurements showed lower values for thicker layers, correlated with their higher electron densities from XRR analysis.
Characterization of nanopartical
This document discusses various characterization techniques for nanoparticles. It describes microscopy methods like scanning electron microscopy (SEM), transmission electron microscopy (TEM), and scanning tunneling microscopy (STM) that can be used to determine nanoparticle size, shape, composition and crystalline structure at high resolution. Spectroscopy methods like X-ray diffraction (XRD), small angle X-ray scattering (SAXS), X-ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, and Fourier transform infrared spectroscopy (FT-IR) are also outlined for analyzing nanoparticle properties. The key techniques of SEM, TEM, XRD and SAXS are then explained in more detail regarding their basic principles and what types of nanoparticle information can be obtained
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The document describes the synthesis and morphology of silicon nanoparticles deposited on a silicon dioxide substrate using low pressure chemical vapor deposition with varying deposition times. Atomic force microscopy and image analysis software were used to characterize the nanoparticles and found that their height, density, and size varied with deposition time, with heights between 1-3 nm, densities from 2x1011 to 3.5x1011 particles/cm2, and sizes of 2-10 nm. The goal was to study how the morphological and electrical characteristics of the nanoparticles changed with different deposition parameters.
Optical Properties of Nanostructured Cerium Oxide Thin Films by Pulsed Laser ...
Cerium oxide thin films were deposited on quartz substrates using pulsed laser deposition. X-ray diffraction was used to characterize the structural properties of the films deposited at different substrate temperatures. The film deposited at 303K was amorphous, while the film deposited at 523K was quasi-crystalline. Increasing the substrate temperature to 923K resulted in a polycrystalline film. Optical properties were studied using UV-visible spectroscopy, which showed the films were highly transparent in the visible region with low reflectance in ultraviolet. Band gap was found to decrease with increasing film thickness.
A Front Surface Optimization Study for Photovoltaic Application
This document summarizes a study on optimizing the front surface of silicon solar cells to reduce reflectance through antireflection coatings and surface texturing. Silicon nitride films were deposited using plasma-enhanced chemical vapor deposition and hot-wire chemical vapor deposition on silicon substrates, and showed weighted average reflectances of 1.5% and 1.8% respectively. Random pyramid surface textures were formed on silicon using potassium hydroxide etching for 30 minutes, achieving low reflectance. Combining the optimized silicon nitride coatings with the textured surfaces further reduced weighted average reflectances to 1.5% for PECVD and 1.8% for HWCVD coatings.
Pulse laser depostion of thin film
This to demonstrate the laser ablation of hard materials to form a thin film for optical sensors. The work was done at DIllard University , New Orleans LA by Professor Abdalla Darwish. any comment e-mail adarwish@bellsouth.net.
WSiN Engineering Design Showcase Poster 2015
This document summarizes an experiment conducted to develop a sputtering process to fabricate tungsten silicon nitride (WSiN) thin film resistors with a target sheet resistance of 2000 Ω/sq for use in new electronic testing equipment. The researchers varied the nitrogen to argon ratio in the sputtering atmosphere and the deposition time to control the film thickness and increase the sheet resistance from an initial 250 Ω/sq to the target value. Stress, thickness, sheet resistance, and uniformity values were measured for different depositions. The process was able to successfully produce WSiN thin film resistors with a sheet resistance of 2000 Ω/sq and a standard deviation below 10%, meeting the requirements.
Nanomechanical Characterization of CdSe QD-Polymer Nanocomposites
Eddie McCumiskey's master's thesis presentation summarizes his research characterizing the mechanical properties of quantum dot (QD)-polymer nanocomposite films. His experiments showed that incorporating QDs into polymer films increased the films' elastic modulus and hardness in a linear fashion with respect to QD loading. The addition of QDs also reduced the films' viscoelasticity and creep. These findings have implications for improving the durability and reliability of QD-polymer hybrid devices.
ELECTRICAL AND STRUCTURAL PROPERTIES OF ZnSe THIN FILMS BY ELECTRODEPOSITION ...
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The document summarizes research on producing zinc selenide (ZnSe) thin films through an electrodeposition technique. X-ray diffraction analysis showed the films had a cubic structure and preferred orientation along the (111) plane. Optical analysis found the band gap was between 2.1-2.3 eV and the films had high transmittance in the visible-near infrared range, making ZnSe suitable as a glazing material. Electrical analysis measured the resistivity of the films to be in the range of 104-1012 Ωm, indicating ZnSe is suitable as a buffer layer in thin film technologies.ELECTRICAL AND STRUCTURAL PROPERTIES OF ZnSe THIN FILMS BY ELECTRODEPOSITION ...
ELECTRICAL AND STRUCTURAL PROPERTIES OF ZnSe THIN FILMS BY ELECTRODEPOSITION ...IKHIOYA IMOSOBOMEH LUCKY
The document summarizes research on producing zinc selenide (ZnSe) thin films through an electrodeposition technique. X-ray diffraction analysis showed the films had a cubic structure and preferred orientation along the (111) plane. Optical analysis found the band gap energy was between 2.1-2.3 eV. Electrical measurements showed the films had high resistivity, making ZnSe suitable as a buffer layer in thin film technologies. Overall, the research aimed to characterize ZnSe thin films produced through an inexpensive electrodeposition method for potential optoelectronic and photovoltaic device applications.DC Conductivity of Composite Silicon Thin Films
Amorphous-nano-crystalline silicon composite thin films (a-nc-Si:H) samples were synthesized by
Plasma Enhanced Chemical Vapor Deposition technique. The measurement of DC conductivities was
accomplished using Dielectric spectroscopy (Impedance Spectroscopy) in wide frequency and temperature range.
In analysis of impedance data, two approaches were tested: the Debye type equivalent circuit with two parallel R
and CPEs (constant phase elements) and modified one, with tree parallel R and CPEs including crystal grain
boundary effects. It was found that the later better fits to experimental results properly describes crystal grains
dielectric effect and hydrogen concentration indicating presence of strain. The amorphous matrix showed larger
resistance and lower capacity than nano-crystal phase. Also it was found that composite silicon thin film cannot
be properly described by equivalent circuit only with resistors and constant phase elements in serial relation
Influence of Thickness on Electrical and Structural Properties of Zinc Oxide ...
Abstract: Zinc Oxide (ZnO) thin films were prepared on corning (7059) glass substrates at a thickness of 75.5 and 130.5nm by RF sputtering technique. The deposition was carried out at room temperature after which the samples were annealed in open air at 1500C. The electrical and structural properties of these films were studied. The electrical properties of the films were monitored by four-point probe method while the structural properties were studied by X-ray diffraction (XRD). It was found that the electrical resistance of the films decreases with increase in the thickness of the films. The XRD analysis of the films showed that the films have a peak located at 〖34.31^0-34.35〗^0with hkl (002). Other parameters calculated include the stress ( ) and the grain size (D).
Zinc oxide thin film
This is a power point presentation of project work on preparing Zinc oxide thin films by using SILAR technique and CBD technique and studying its characteristics.
Literature Review of Microstrip Patch Antenna Design with Rectangular Patch f...
The document reviews rectangular microstrip patch antenna designs using various substrates including FR-4 epoxy, bakelite, Taconic, and Rogers RT 5880. Key performance parameters like gain, return loss, and efficiency were compared at a resonance frequency of 2.4GHz. Rogers RT 5880 demonstrated the best performance with a gain of 7.2dB, return loss of -31.9dB, and maximum efficiency of 90%. Overall, Rogers RT 5880 emerged as the best substrate material based on its superior performance across several metrics.
20140211 - Paper 9052-6 Next-generation multi-wavelength lithography Printout
This document summarizes next-generation multi-wavelength lithography techniques that can achieve resolutions below 10 nm. It discusses using multiple wavelengths of light - an activation wavelength to expose areas and a deactivating wavelength to trim the exposed areas via stimulated emission depletion (STED). This allows placing features closer together than the diffraction limit. The document outlines resist requirements, throughput estimates for different pattern types, and status of material development challenges. It proposes that multi-color resists using 3 wavelengths provide the best path to small pitches and require further industrial support.
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(1) The document discusses optimization of AB2-type alloy composition for improved hydrogen storage properties. (2) Testing of alloys with varying non-stoichiometry found that A1.05B2 alloy exhibited the best properties with a working capacity of 1.55 wt%, fast kinetics, and suitable thermodynamics. (3) Overall, modifying the chemical environment through non-stoichiometry was found to increase storage capacity by altering the size of interstitial sites.
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This document summarizes the findings of a field survey on consumer behavior towards electricity consumption in India. The survey analyzed household electricity demand based on various parameters such as demographical area, annual income, seasons, and appliances used. Some key findings included:
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2) Demand also varied based on income levels, with higher income households consuming more electricity on average.
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236 rakhi
The document summarizes a presentation given at the IVth International Conference on Advances in Energy Research about using a doubly fed induction generator (DFIG) with a back-to-back converter for islanding operation to provide rural electrification. It introduces DFIG technology and control schemes for DFIG, and presents simulation results showing the performance of a DFIG system with battery energy storage supplying balanced and unbalanced resistive and reactive loads. The conclusion discusses how such systems can provide power for remotely located villages using locally available wind energy.
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The document summarizes an experimental analysis of converting a 1400 cc diesel engine car into a hybrid electric vehicle using BLDC hub motors. Key findings include:
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84 padmini
M. Padmini and Dr. Manoj S. Soni presented on concentrating solar photovoltaics at the IVth International Conference on Advances in Energy Research at IIT Bombay from December 10-12, 2013. Their presentation discussed various concentrating photovoltaic techniques including parabolic concentrators, hyperboloid concentrators, Fresnel lenses, compound parabolic concentrators, and quantum dot concentrators. It provided details on how each technique works and its advantages. It also discussed recent developments like rod lenses and solar spheres. Finally, it analyzed the potential cost savings of a 30MW concentrating solar farm in India compared to a non-concentrating system, finding that concentration could reduce costs from Rs. 200
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195 b.m. sudaroli
The document summarizes heat and mass transfer characteristics of direct methanol fuel cells (DMFCs) based on experiments and modeling. Key points:
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This document summarizes a study on the kinetics of sodium borohydride hydrolysis using cobalt chloride as a catalyst. The study was conducted by Arshdeep Kaur under the guidance of Pramod K. Bajpai and Dr. D. Gangacharyulu at Thapar University in Patiala, India. The study examined the effects of temperature, sodium borohydride concentration, sodium hydroxide concentration, and cobalt chloride concentration on the hydrolysis reaction rate. Kinetic parameters including the reaction order and rate constants were determined. Hydrogen gas was qualitatively and quantitatively analyzed. Residual products were examined using scanning electron microscopy.
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This document summarizes research conducted on producing and analyzing biodiesel obtained from cottonseed oil. The researchers used two transesterification methods to produce biodiesel from various vegetable oils including cottonseed oil. They analyzed the effects of catalyst concentration on biodiesel yield and compared properties and engine performance of biodiesel to diesel. Their results showed the second method achieved over 92% yield from cottonseed oil. Properties of the cottonseed biodiesel matched diesel specifications. Engine tests showed performance similar to diesel with higher fuel consumption for biodiesel. They concluded cottonseed biodiesel is recommended for short term use during fuel shortages based on their results.
212 aparna
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315 devendra
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303 piyush
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This document outlines an experimental investigation on the performance and emissions of a diesel engine fueled with mahua oil methyl ester (biodiesel) and an additive. The objectives were to produce biodiesel from mahua oil via transesterification, characterize fuel properties, prepare test fuels as biodiesel blends, and test the blends in a diesel engine. Various engine performance and emission parameters were estimated using the blends and compared to diesel. The results showed that with increasing additive percentage in the biodiesel, engine performance improved with lower emissions. The conclusion was that mahua biodiesel with an additive can be a suitable alternative fuel for diesel engines.
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This document summarizes an experimental study on improving the low temperature properties of biodiesel produced from high free fatty acid soy oil. The study tested blending the biodiesel with ethanol, methanol, kerosene, diesel, castor biodiesel, jatropha biodiesel, and adding a commercial antigel additive. Results showed blending with ethanol and methanol up to 20% improved cloud point and pour point the most. Adding 2% of the commercial additive also significantly improved low temperature properties. The conclusions were that ethanol, kerosene, and commercial additives can effectively enhance the cold flow properties of the high free fatty acid biodiesel, making it usable in colder climates.
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Your goto partner for Oracle Cloud, PeopleSoft, E-Business Suite, and Ellucian Banner. We are a firm specialized in managed services and consulting.
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The objectives of the Lunch and Learn presentation were to:
- Review what KM ‘is’ and ‘isn’t’
- Understand the value of KM and the benefits of engaging
- Define and reflect on your “what’s in it for me?”
- Share actionable ways you can participate in Knowledge - - Capture & Transfer
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Attributes & automation parameters enable the automation author to pass data values from one automation component to the next. During this webinar, our FME Flow Specialists will cover leveraging the three types of these output attributes & parameters in FME Flow: Event, Custom, and Automation. As a bonus, they’ll also be making use of the Split-Merge Block functionality.
You’ll leave this webinar with a better understanding of how to maximize the potential of automations by making use of attributes & automation parameters, with the ultimate goal of setting your enterprise integration workflows up on autopilot.
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I develop the Ruby programming language, RubyGems, and Bundler, which are package managers for Ruby. Today, I will introduce how to enhance the security of your application using open-source software (OSS) examples from Ruby and RubyGems.
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Choosing The Best AWS Service For Your Website + API.pptx
Have you ever been confused by the myriad of choices offered by AWS for hosting a website or an API?
Lambda, Elastic Beanstalk, Lightsail, Amplify, S3 (and more!) can each host websites + APIs. But which one should we choose?
Which one is cheapest? Which one is fastest? Which one will scale to meet our needs?
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At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
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Manufacturing custom quality metal nameplates and badges involves several standard operations. Processes include sheet prep, lithography, screening, coating, punch press and inspection. All decoration is completed in the flat sheet with adhesive and tooling operations following. The possibilities for creating unique durable nameplates are endless. How will you create your brand identity? We can help!
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
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4. Deployment Using ArgoCD for Edge Devices
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5. Introduction to Apache Kafka and S3
- Explore Apache Kafka for real-time data streaming and Amazon S3 for scalable storage solutions.
6. Viewing Kafka Messages in the Data Lake
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7. What is Prometheus?
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8. Monitoring Application Metrics with Prometheus
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9. What is Camel K?
- Introduction to Camel K, a lightweight integration framework built on Apache Camel, designed for Kubernetes.
10. Configuring Camel K Integrations for Data Pipelines
- Learn how to configure Camel K for seamless data pipeline integrations in your anomaly detection workflow.
11. What is a Jupyter Notebook?
- Overview of Jupyter Notebooks, an open-source web application for creating and sharing documents with live code, equations, visualizations, and narrative text.
12. Jupyter Notebooks with Code Examples
- Hands-on examples and code snippets in Jupyter Notebooks to help you implement and test anomaly detection models.
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“Temporal Event Neural Networks: A More Efficient Alternative to the Transfor...
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Chris Jones, Director of Product Management at BrainChip , presents the “Temporal Event Neural Networks: A More Efficient Alternative to the Transformer” tutorial at the May 2024 Embedded Vision Summit.
The expansion of AI services necessitates enhanced computational capabilities on edge devices. Temporal Event Neural Networks (TENNs), developed by BrainChip, represent a novel and highly efficient state-space network. TENNs demonstrate exceptional proficiency in handling multi-dimensional streaming data, facilitating advancements in object detection, action recognition, speech enhancement and language model/sequence generation. Through the utilization of polynomial-based continuous convolutions, TENNs streamline models, expedite training processes and significantly diminish memory requirements, achieving notable reductions of up to 50x in parameters and 5,000x in energy consumption compared to prevailing methodologies like transformers.
Integration with BrainChip’s Akida neuromorphic hardware IP further enhances TENNs’ capabilities, enabling the realization of highly capable, portable and passively cooled edge devices. This presentation delves into the technical innovations underlying TENNs, presents real-world benchmarks, and elucidates how this cutting-edge approach is positioned to revolutionize edge AI across diverse applications.[OReilly Superstream] Occupy the Space: A grassroots guide to engineering (an...
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zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
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305 deokate
- 1. Cu 2 ZnSnS 4 (CZTS) Thin Films for Solar Cell Application Dr. Ramesh J. Deokate Vidya Pratishthan’s Arts, Science and Commerce College, Baramati VPA SC MS-413 133.
- 2. Outline of Presentation Introduction of Cu2ZnSnS4(CZTS) Synthesis of Cu2ZnSnS4 Thin films Characterization techniques: X-ray diffraction (XRD ) Scanning Electron Microscopy (SEM) Theromoemf power (TEP) Resistivity measurement Contact angle and Band gap study Conclusions VPA SC
- 3. Properties of Cu2ZnSnS4 (CZTS) VPA SC
- 4. Methodology Advantages of SPT Neither requires high quality targets and/or substrates nor it requires vacuum at any stage, which is a great advantage if the technique is to be scaled up for industrial applications. The deposition rate and the thickness of the films can be easily controlled over a wide range by changing the spray parameters. Operating at moderate temperatures (373-773 K), spray pyrolysis can produce films on less robust materials. It can be used to make layered films and films having composition gradients throughout the thickness. VPA SC Inexpensive, simple and convenient for large area deposition. This method provide one step synthesis without no impurities. Schematic representation of spray pyrolysis deposition apparatus
- 5. Preparation of Cu2ZnSnS4 films by Spray pyrolysis technique Chemicals used and preparative parameters Precursor solution (Cd(CH3COO)2.2H2O) (0.025) (Zn(CH3COO)2 SnCl4 4SC(NH2)2 Total quantity 80 ml Deposition temp. 623 K Deposition period 20 min. Substrate (0.025) (0.025) (0.2) Glass Reaction mechanism VPA SC 2Cu(CH33COO)+ Zn(CH33COO)2+SnCl4+ 2Cu(CH COO) + Zn(CH COO)2+ SnCl4+ 8H22O+4SC(NH22)2→ Cu22ZnSnS4+4CO22↑+ 8H O+ 4SC(NH )2 → Cu ZnSnS4+ 4CO ↑+ 4CH33COOH↑+4NH44Cl↑+4NH3↑ 4CH COOH↑+ 4NH Cl↑+4NH3↑
- 6. Film thickness measurements Variation of Cu2ZnSnS4 film thickness for different solution quantity. VPA SC 6
- 7. X-Ray diffraction (XRD) studies VPA SC
- 8. Scanning Electron Micrograph (SEM) VPA SC
- 10. Optical study and Electrical Resistivity Increasing film thickness Increasing film thickness the band gap energy the band gap energy increases from 1.59 to 1.67 increases from 1.59 to 1.67 eV. eV. 4.0 log ρ (Ω−cm) 3.6 The resistivity decreases with The resistivity decreases with increase in temperature which increase in temperature which is the indication of typical is the indication of typical 244 nm 375 nm 568 nm 754 nm semiconductor characteristic.. semiconductor characteristic 3.2 2.8 2.4 2.0 VPA SC 1.0 1.5 2.0 2.5 3.0 -1 1000/T (K ) 3.5 4.0
- 11. Summary and conclusions The CZTS thin films have been successfully deposited by a simple and inexpensive spray pyrolysis technique. The thickness of CZTS films affects structural, optical and electrical properties. The crystallinity and the grain size increased with film thickness. Optical absorption study revealed indirect direct transition with band gap energy in the range 1.6 to 1.67 eV, depending on film thickness. The electrical conductivity and contact angle were enhanced with the film thickness. VPA SC
- 12. Acknowledgement Authors are grateful to University of Pune (UoP) for financial support through the BCUD scheme no. 36-207/2012-14 (SR). VPA SC
- 13. Thank You VPA SC