Performance analysis of high-k materials as stern layer in ion-sensitive fiel...TELKOMNIKA JOURNAL
High-k materials as a STERN Layer for Ion-Sensitive-Field-Effect-Transistor (ISFET) have improved ISFET sensitivity and stability. These materials decrease leakage current and increase capacitance of the ISFET gate toward highest current sensitivity. So far, many high-k materials have been utilized for ISFET, yet they were examined individually, or using numerical solutions rather than using integrated TCAD environment. Exploiting TCAD environment leads to extract ISFET equivalent circuit parameters and performs full analysis for both device and circuit. In this study we introduce a comprehensive investigation of different high-k material, Tio2, Ta2O5, ZrO2, Al2O3, HfO2 and Si3N4 as well as normal silicon dioxide and their effects on ISFET sensitivity and stability. This was implemented by developing commercial Silvaco TCAD rather than expensive real fabrication. The results confirm that employing high-k materials in ISFET outperform normal silicon dioxide in terms of sensitivity and stability. Further analysis revealed that Titanium dioxide showed the highest sensitivity followed by two groups HfO2, Ta2O5 and ZrO2, Al2O3 respectively. Another notable exception of Si3N4 that is less than other materials, but still have higher sensitivity than normal silicon dioxide. We believe that this study opens new directions for further analysis and optimization prior to the real cost-ineffective fabrication.
Transparent electronics is an emerging technology that employs wide band-gap semiconductors for the realization of invisible electronics circuits and optoelectronics devices.
this a presentation on transparent electronics. check out a really wonderful technology evolved in...............
Presented by :
1. ISLAM MD RAISUL 13-23674-1
2. HASAN,RAKIB-UL 13-23538-1
3. AZAM MD. AKIBUL 13-23680-1
4. RAHMAN MD. RIFAT 13-23747-1
5. RAHMAN ASHIKUR 13-23293-1
AIUB (EEE)
Course Name : POWER STATION
Performance analysis of high-k materials as stern layer in ion-sensitive fiel...TELKOMNIKA JOURNAL
High-k materials as a STERN Layer for Ion-Sensitive-Field-Effect-Transistor (ISFET) have improved ISFET sensitivity and stability. These materials decrease leakage current and increase capacitance of the ISFET gate toward highest current sensitivity. So far, many high-k materials have been utilized for ISFET, yet they were examined individually, or using numerical solutions rather than using integrated TCAD environment. Exploiting TCAD environment leads to extract ISFET equivalent circuit parameters and performs full analysis for both device and circuit. In this study we introduce a comprehensive investigation of different high-k material, Tio2, Ta2O5, ZrO2, Al2O3, HfO2 and Si3N4 as well as normal silicon dioxide and their effects on ISFET sensitivity and stability. This was implemented by developing commercial Silvaco TCAD rather than expensive real fabrication. The results confirm that employing high-k materials in ISFET outperform normal silicon dioxide in terms of sensitivity and stability. Further analysis revealed that Titanium dioxide showed the highest sensitivity followed by two groups HfO2, Ta2O5 and ZrO2, Al2O3 respectively. Another notable exception of Si3N4 that is less than other materials, but still have higher sensitivity than normal silicon dioxide. We believe that this study opens new directions for further analysis and optimization prior to the real cost-ineffective fabrication.
Transparent electronics is an emerging technology that employs wide band-gap semiconductors for the realization of invisible electronics circuits and optoelectronics devices.
this a presentation on transparent electronics. check out a really wonderful technology evolved in...............
Presented by :
1. ISLAM MD RAISUL 13-23674-1
2. HASAN,RAKIB-UL 13-23538-1
3. AZAM MD. AKIBUL 13-23680-1
4. RAHMAN MD. RIFAT 13-23747-1
5. RAHMAN ASHIKUR 13-23293-1
AIUB (EEE)
Course Name : POWER STATION
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Transparent Electronic PPT
Transparent electronics is an emerging science and technology field focused on producing ‘invisible’ electronic circuitry and opto-electronic devices. Applications include consumer electronics, new energy sources, and transportation; for example, automobile windshields could transmit visual information to the driver. Glass in almost any setting could also double as an electronic device, possibly improving security systems or offering transparent displays. In a similar vein, windows could be used to produce electrical power. Other civilian and military applications in this research field include realtime wearable displays. As for conventional Si/III–V-based electronics, the basic device structure is based on semiconductor junctions and transistors. However, the device building block materials, the semiconductor, the electric contacts, and the dielectric/passivation layers, must now be transparent in the visible –a true challenge! Therefore, the first scientific goal of this technology must be to discover, understand, and implement transparent high-performance electronic materials. The second goal is their implementation and evaluation in transistor and circuit structures. The third goal relates to achieving application-specific properties since transistor performance and materials property requirements vary, depending on the final product device specifications. Consequently, to enable this revolutionary technology requires bringing together expertise from various pure and applied sciences, including materials science, chemistry, physics, electrical/electronic/circuit engineering, and display science.
Fabrication and studying the dielectric properties of (polystyrene-copper oxi...journalBEEI
The preparation of (polystyrene-copper oxide) nanocomposites have been investigated for piezoelectric application. The copper oxide nanoparticles were added to polystyrene by different concentrations are (0, 4, 8 and 12) wt.%. The structural and A.C electrical properties of (PS-CuO) nanocomposites were studied. The results showed that the dielectric constant and dielectric loss of (PS-CuO) nanocomposites decrease with increase in frequency. The A.C electrical conductivity increases with increase in frequency. The dielectric constant, dielectric loss and A.C electrical conductivity of polystyrene increase with increase in copper oxide nanoparticles concentrations. The results of piezoelectric application showed that the electrical resistance of (PS-CuO) nanocomposites decreases with increase in pressure.
Transparent electronics is very exciting technology which will change our perception to see the things around our surroundings. This presentation will give you a general idea about transparent electronics.
I hope you will like it.
Thank you.
These slides use concepts from my (Jeff Funk) course entitled analyzing hi-tech opportunities to analyze how transparent electronics are becoming economic feasible. Transparent electronics can turn windows into displays and solar cells and enable more aesthetically pleasing designs. Home, car, and office windows can be used to display information or absorb solar energy. The former is also applicable to contact lenses and glasses. Transparent electronics can also enable new forms of designs such as transparent phones, appliances, and monitors. Improvements in transparent conductive films such as indium tin oxides, other forms of oxides, and graphene enable these transparent displays.
TRANSPARENT ELECTRONICS
Abstract: Transparent electronics is an emerging science and technology field focused on producing ‘invisible’ electronic circuitry and opto-electronic devices.
Applications include consumer electronics, new energy sources, and transportation; for example, automobilewindshields could transmit visual information to the driver. Glass in almost any setting could also double as an electronic device, possibly improving security systems or offering transparent displays. In a similar vein, windows could be used to produce electrical power. Other civilian and military applications in this research field include realtime wearable displays.
As for conventional Si/III–V-based electronics, the basic device structure is based on semiconductor junctions and transistors. However, the device building block materials, the semiconductor, the electric contacts, and the ielectric/passivation layers, must now be transparent in the visible –a true challenge! Therefore, the first scientific goal of this technology must be to discover,understand, and implement transparent high-performance electronic materials. The second goal is their implementation and evaluation in transistor and circuit structures.
The electronics during the past 10 years, the classes of materials available for transparent electronics applications have grown dramatically. Historically, this area was dominated by transparent conducting oxides (oxide materials that are both electrically conductive and optically transparent) because of their wide use in antistatic coatings, touch display panels, solar cells, flat panel displays, heaters, defrosters, ‘smart windows’ and optical coatings. All these applications use transparent conductive oxides as passive electrical or optical coatings. The field of transparent conducting oxide (TCO) materials has been reviewed and many treatises on the topic are available. However, more recently there have been tremendous efforts to develop new active materials for functional transparent electronics. These new technologies will require new materials sets, in addition to the TCO component, including conducting, dielectric and semiconducting materials, as well as passive components for full device fabrication.
COMBINING OPTICAL TRANSPARENCY WITH ELECTRICAL CONDUCTIVITY
Transparent conductors are neither 100% optically transparent nor metallically conductive. From the band structure point of view, the combination of the two properties in the same material is contradictory: a transparent material is an insulator which possesses completely filled valence and empty conduction bands; whereas metallic conductivity appears when the Fermi level lies within a band with a large density of states to provide high carrier concentration. Efficient transparent conductors find their niche in a compromise between a sufficient transmission within the visible spectral range and a moderate but useful in practice electrical conductivity.
Transparent electronics is an emerging science and technology field concentrates on producing ‘invisible’ electronics circuit and optoelectronics devices. The application contains consumer electronics such as automobile windshield, transparent solar panel, transparent display and real time wearable display. In the conventional Si/III-V based electronics, the structure is based on semiconductor junction & transistor. However, the basic building material for transparent electronic devices which is to be transparent and in visible range is a true challenge. Therefore, to understand and implement such technology there are two scientific goals, to have a material which are optically transparent and electrically conductive and to implement an invisible circuitry. Development of such invisible transparent electronic devices needs expertise together from pure and applied science, material science, chemistry, physics &electronic science.
Engineering Research Publication
Best International Journals, High Impact Journals,
International Journal of Engineering & Technical Research
ISSN : 2321-0869 (O) 2454-4698 (P)
www.erpublication.org
OFET Preparation by Lithography and Thin Film Depositions ProcessTELKOMNIKA JOURNAL
The length of the channel OFET based thin film is determined during preparation takes place
using the technique of lithography and mask during the metal deposition process. The lithography
technique is the basic process steps in the manufacture of semiconductor devices. Lithography is the
process of moving geometric shapes mask pattern to a thin film of material that is sensitive to light. The
pattern of geometric shapes on a mask has specifications, as follows: long-distance source and drain
channels varied, i.e. 100 μm, the width of the source and drain are made permanent. Bottom contact
OFET structure has been created using a combination of lithography and thin film deposition processes.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Transparent Electronic PPT
Transparent electronics is an emerging science and technology field focused on producing ‘invisible’ electronic circuitry and opto-electronic devices. Applications include consumer electronics, new energy sources, and transportation; for example, automobile windshields could transmit visual information to the driver. Glass in almost any setting could also double as an electronic device, possibly improving security systems or offering transparent displays. In a similar vein, windows could be used to produce electrical power. Other civilian and military applications in this research field include realtime wearable displays. As for conventional Si/III–V-based electronics, the basic device structure is based on semiconductor junctions and transistors. However, the device building block materials, the semiconductor, the electric contacts, and the dielectric/passivation layers, must now be transparent in the visible –a true challenge! Therefore, the first scientific goal of this technology must be to discover, understand, and implement transparent high-performance electronic materials. The second goal is their implementation and evaluation in transistor and circuit structures. The third goal relates to achieving application-specific properties since transistor performance and materials property requirements vary, depending on the final product device specifications. Consequently, to enable this revolutionary technology requires bringing together expertise from various pure and applied sciences, including materials science, chemistry, physics, electrical/electronic/circuit engineering, and display science.
Fabrication and studying the dielectric properties of (polystyrene-copper oxi...journalBEEI
The preparation of (polystyrene-copper oxide) nanocomposites have been investigated for piezoelectric application. The copper oxide nanoparticles were added to polystyrene by different concentrations are (0, 4, 8 and 12) wt.%. The structural and A.C electrical properties of (PS-CuO) nanocomposites were studied. The results showed that the dielectric constant and dielectric loss of (PS-CuO) nanocomposites decrease with increase in frequency. The A.C electrical conductivity increases with increase in frequency. The dielectric constant, dielectric loss and A.C electrical conductivity of polystyrene increase with increase in copper oxide nanoparticles concentrations. The results of piezoelectric application showed that the electrical resistance of (PS-CuO) nanocomposites decreases with increase in pressure.
Transparent electronics is very exciting technology which will change our perception to see the things around our surroundings. This presentation will give you a general idea about transparent electronics.
I hope you will like it.
Thank you.
These slides use concepts from my (Jeff Funk) course entitled analyzing hi-tech opportunities to analyze how transparent electronics are becoming economic feasible. Transparent electronics can turn windows into displays and solar cells and enable more aesthetically pleasing designs. Home, car, and office windows can be used to display information or absorb solar energy. The former is also applicable to contact lenses and glasses. Transparent electronics can also enable new forms of designs such as transparent phones, appliances, and monitors. Improvements in transparent conductive films such as indium tin oxides, other forms of oxides, and graphene enable these transparent displays.
TRANSPARENT ELECTRONICS
Abstract: Transparent electronics is an emerging science and technology field focused on producing ‘invisible’ electronic circuitry and opto-electronic devices.
Applications include consumer electronics, new energy sources, and transportation; for example, automobilewindshields could transmit visual information to the driver. Glass in almost any setting could also double as an electronic device, possibly improving security systems or offering transparent displays. In a similar vein, windows could be used to produce electrical power. Other civilian and military applications in this research field include realtime wearable displays.
As for conventional Si/III–V-based electronics, the basic device structure is based on semiconductor junctions and transistors. However, the device building block materials, the semiconductor, the electric contacts, and the ielectric/passivation layers, must now be transparent in the visible –a true challenge! Therefore, the first scientific goal of this technology must be to discover,understand, and implement transparent high-performance electronic materials. The second goal is their implementation and evaluation in transistor and circuit structures.
The electronics during the past 10 years, the classes of materials available for transparent electronics applications have grown dramatically. Historically, this area was dominated by transparent conducting oxides (oxide materials that are both electrically conductive and optically transparent) because of their wide use in antistatic coatings, touch display panels, solar cells, flat panel displays, heaters, defrosters, ‘smart windows’ and optical coatings. All these applications use transparent conductive oxides as passive electrical or optical coatings. The field of transparent conducting oxide (TCO) materials has been reviewed and many treatises on the topic are available. However, more recently there have been tremendous efforts to develop new active materials for functional transparent electronics. These new technologies will require new materials sets, in addition to the TCO component, including conducting, dielectric and semiconducting materials, as well as passive components for full device fabrication.
COMBINING OPTICAL TRANSPARENCY WITH ELECTRICAL CONDUCTIVITY
Transparent conductors are neither 100% optically transparent nor metallically conductive. From the band structure point of view, the combination of the two properties in the same material is contradictory: a transparent material is an insulator which possesses completely filled valence and empty conduction bands; whereas metallic conductivity appears when the Fermi level lies within a band with a large density of states to provide high carrier concentration. Efficient transparent conductors find their niche in a compromise between a sufficient transmission within the visible spectral range and a moderate but useful in practice electrical conductivity.
Transparent electronics is an emerging science and technology field concentrates on producing ‘invisible’ electronics circuit and optoelectronics devices. The application contains consumer electronics such as automobile windshield, transparent solar panel, transparent display and real time wearable display. In the conventional Si/III-V based electronics, the structure is based on semiconductor junction & transistor. However, the basic building material for transparent electronic devices which is to be transparent and in visible range is a true challenge. Therefore, to understand and implement such technology there are two scientific goals, to have a material which are optically transparent and electrically conductive and to implement an invisible circuitry. Development of such invisible transparent electronic devices needs expertise together from pure and applied science, material science, chemistry, physics &electronic science.
Engineering Research Publication
Best International Journals, High Impact Journals,
International Journal of Engineering & Technical Research
ISSN : 2321-0869 (O) 2454-4698 (P)
www.erpublication.org
OFET Preparation by Lithography and Thin Film Depositions ProcessTELKOMNIKA JOURNAL
The length of the channel OFET based thin film is determined during preparation takes place
using the technique of lithography and mask during the metal deposition process. The lithography
technique is the basic process steps in the manufacture of semiconductor devices. Lithography is the
process of moving geometric shapes mask pattern to a thin film of material that is sensitive to light. The
pattern of geometric shapes on a mask has specifications, as follows: long-distance source and drain
channels varied, i.e. 100 μm, the width of the source and drain are made permanent. Bottom contact
OFET structure has been created using a combination of lithography and thin film deposition processes.
Effect of Temperature and Nickel Concentration on the Electrical and Dielectr...IJERD Editor
In this paper the effect of temperature range of 298 K to 348 K and volume filler content ф on
electrical properties of polyethylene PE filled with nickel Ni powders has been investigated .The volume
electrical resistivity
V
of such composites decreases suddenly by several orders of magnitude at a critical
volume concentration (i.e. фc=14.27 Vol.%) ,whereas the dielectric constant and the A.C electrical
conductivity AC of such composites increase suddenly at a critical volume concentration (i.e. фc=14.27
Vol.%).For volume filler content lower than percolation threshold ф<фc> фc there is increase in the value of their
resistivity, and decrease in the value of their dielectric constant and the A.C electrical conductivity AC with
increasing temperature indicating metallic-conduction.
Results from fabrication and study of flexible piezoelectric harvesting device with ZnO nanostructured film are reported. Enhanced piezoelectric response is achieved in term of voltage to thickness ratio due to the nanobranched structure of the ZnO. The results are related to project “Study of the piezoelectric response of layered microgenerators on flexible substrates” - DH 07/13, funded by Bulgarian National Science Fund. Any collaborations are welcome! If you are interested, please write us at m_aleksandrova@tu-sofia.bg.
Synthesis of (Poly-methyl Methacrylate-lead Oxide) Nanocomposites and Studyin...journalBEEI
Piezoelectric materials have been prepared from (poly-methyl methacrylate-lead oxide) nanocomposites for electronic applications. The lead oxide nanoparticles were added to poly-methyl methacrylate by different concentrations are (4, 8, and 12) wt%. The structural and dielectric properties of nanocomposites were studied. The results showed that the dielectric constant and dielectric loss of nanocomposites decrease with increase in frequency of applied electric field. The A.C electrical conductivity increases with increase in frequency. The dielectric constant, dielectric loss and A.C electrical conductivity of poly-methyl methacrylate increase with increase in lead oxide nanoparticles concentrations. The results of pressure sensor showed that the electrical resistance of (PMMA-PbO2) nanocomposites decreases with increase in pressure.
Performance comparison of selection nanoparticles for insulation of three cor...IJECEIAES
This paper presents an investigation on the enhancement of electrical insulations of power cables materials using a new multi-nanoparticles technique. It has been studied the effect of adding specified types and concentrations of nanoparticles to polymeric materials such as PVC for controlling on electric and dielectric performance. Prediction of effective dielectric constant has been done for the new nanocomposites based on Interphase Power Law (IPL) model. The multi-nanoparticles technique has been succeeded for enhancing electric and dielectric performance of power cables insulation compared with adding individual nanoparticles. Finally, it has been investigated on electric field distribution in the new proposed modern insulations for three-phase core belted power cables. This research has focused on studying development of PVC nanocomposite materials performance with electric field distribution superior to the unfilled matrix, and has stressed particularly the effect of filler volume fraction on the electric field distribution.
Fabrication and characterization of printed zinc batteriesjournalBEEI
Zinc batteries are a more sustainable alternative to lithium-ion batteries due to its components being highly recyclable. With the improvements in the screen printing technology, high quality devices can be printed with at high throughput and precision at a lower cost compared to those manufactured using lithographic techniques. In this paper we describe the fabrication and characterization of printed zinc batteries. Different binder materials such as polyvinyl pyrrolidone (PVP) and polyvinyl butyral (PVB), were used to fabricate the electrodes. The electrodes were first evaluated using three-electrode cyclic voltammetry, x-ray diffraction (XRD), and scanning electron microscopy before being fully assembled and tested using charge-discharge test and two-electrode cyclic voltammetry. The results show that the printed ZnO electrode with PVB as binder performed better than PVP-based ZnO. The XRD data prove that the electro-active materials were successfully transferred to the sample. However, based on the evaluation, the results show that the cathode electrode was dominated by the silver instead of Ni(OH)2, which leads the sample to behave like a silver-zinc battery instead of a nickel-zinc battery. Nevertheless, the printed zinc battery electrodes were successfully evaluated, and more current collector materials for cathode should be explored for printed nickel-zinc batteries.
Device simulation of perovskite solar cells with molybdenum disulfide as acti...journalBEEI
Organo-halide Perovskite Solar Cells (PSC) have been reported to achieve remarkably high power conversion efficiency (PCE). A thorough understanding of the role of each component in solar cells and their effect as a whole is still required for further improvement in PCE. In this paper, the effect of Molybdenum Disulfide (MoS2) in PSC with mesoporous structure configuration was analyzed using Solar Cell Capacitance Simulator (SCAPS). With the MoS2 layer which having two-fold function, acting as a protective layer, by preventing the formation of shunt contacts between perovskite and Au electrode, and as a hole transport material (HTM) from the perovskite to the Spiro-OMETAD. As simulated, PSC demonstrates a PCE, ŋ of 13.1%, along with stability compared to typical structure of PSC without MoS2 (Δ ŋ/ŋ=-9% vs. Δ ŋ/ŋ=-6%). The results pave the way towards the implementation of MoS2 as a material able to boost shelf life which very useful for new material choice and optimization of HTMs
Carbon Nanotubes Effect for Polymer Materials on Break Down Voltage IJECEIAES
Epoxy resin composites reinforced to different types of carbon nano-particles have been fabricated. Carbon black (20, 30 and 40 wt. %), graphene (0.5 to 4 wt. %) and carbon nanotubes (CNT) (0.5 to 2 wt. %) were added with different weight percentages to epoxy. The dielectric strength of composites was tested in several conditions such as (dry, wet, low salinity and high salinity). The mechanical characterization showed that the nano-composite Polymer enhanced by using these particles in the tensile strength. Thermal gravimetric analysis shows effect of these nano-particles on the thermal structure of epoxy resin. Scanning Electron Microscopic test is used to characterize the dispersion of carbon nano-particles and to analysis the fractured parts in the nano scale.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Communications Mining Series - Zero to Hero - Session 1DianaGray10
This session provides introduction to UiPath Communication Mining, importance and platform overview. You will acquire a good understand of the phases in Communication Mining as we go over the platform with you. Topics covered:
• Communication Mining Overview
• Why is it important?
• How can it help today’s business and the benefits
• Phases in Communication Mining
• Demo on Platform overview
• Q/A
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
Generative AI Deep Dive: Advancing from Proof of Concept to Production
Printed polymer flexible energy harvesting - impact of the electrode materials and patterns
1. Study of printed polymeric flexible energy
harvesting elements – impact of the electrode
materials and patterns
M Aleksandrova1, R Aepuru2, G Dobrikov1
1Technical university of Sofia, Department of Microelectronics, Sofia, Bulgaria
2University of Concepcion, Department of Materials Engineering,Concepcion, Chile
Corresponding author’s e-mail: m_aleksndrova@tu-sofia.bg
1
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
2. Aim: To investigate different sets of piezoelectric energy harvesting (PEH) devices
with three different electrode materials and three different electrode topologies
(patterns) in terms of piezoelectric output voltage and long-term stability of the
produced signal.
Novelty: Study of the energy harvesting performance of piezoelectric device,
involving polymeric ink that was screen printed on gold, silver and aluminum with
square, meander and side-comb shapes patterns. By the authors‘ knowledge
similar problem has not been investigated yet.
2
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
3. State-of-the-art
Application of the pressure/force/vibrational sensitive piezoelectric materials
energy harvesting or force detection – general term piezoelectric transducer.
Before – the sensor was few square
centimeter thick plate and cable
attachable to the electronics
Nowadays, it should be smaller
size, directly integrated into the
chip - MEMS 3
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
4. Source: https://www.dmg.msm.cam.ac.uk/research/nanogenerators
Piezoelectric based nanoelectromechanical systems (NEMS) are advanced technology for energy
harvesting devices, containing nanosized coatings, in cases when periodical mechanical activation
is available to stimulate charges generation. This technology has variety of applications.
Some of the most emerging applications using this effect are battery-less power supply for sensors
in the biomedicine, detecting human organs activity:
1. Heart beating rate; 2. Blood pressure change; 3. Breathing; 4. Arms or legs moving
For biomedical devices, lead-free piezoelectric materials have focused significant attention for
implants, where compatibility with the human tissue is crucial factor for selection of materials, but
this possibility is still under investigation (although there are reports for prototype of implantable
PEH for pacemakers, using normal motion of the heart-related blood vessels to generate power,
but they are not yet widely spread, due to reliability problems).
4
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
5. 5
Currently, most of the real applications require wearable PEH.
APPLIED PHYSICS LETTERS 107, 202901 (2015)
Although the mechanical loads could be bending, stretching or twisting (or combination of
all), the goal is suitable PEH device mounting, so it will experience maximal load, but in the
same time it will experience dominantly (if possible) only one of the above loading types.
https://www.idtechex.com/ J. Mater. Chem. C, 2015,3, 11806-11814 http://www.somap.jku.at/ Nano Energy, Vol. 15, 2015, рр. 177-185
It was found that the bending is the most often met situation when human motions are in
question (press-release type, or compression-tension type).
This was our motivation to focus this study on flexible PEHs and their bending test
with loading vibration, causing compression-tension type of loading.
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
6. 6
Experimental section
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
a) bottom electrode patterns b) flexed PEN/Au c) completed structure
Photos of the prepared samples
• Polyethylene naphthalate (PEN) plastic substrates
125 μm.
• Screen printing of PVDF-TrFE polymeric ink with
mesh count of 180 n/cm and wire diameter of 30
µm was used and the deposition parameters were
squeegee speed of 200 mm/s and pressure of 3
bars. The film thickness was approximately 3 μm.
• Gold films was DC sputtered.
• Aluminium and silver electrode films were vacuum
thermally evaporated.
poly[(vinylidenefluoride-co-
trifluoroethylene] - P(VDF-TrFE)
• low Young modulus of 0.61 GPa,
• favourable for durability at bending
and twisting substrates
7. 7
Results
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
1 2 3
0
200
400
600
800
AlAuAg
piezoelectricvoltage,mV
types of metal electrodes
rectangular
meander
side comb
Comparison of the metals and their pattern
suitable for PVDF-TrFe piezoelectric flexible
elements at maximum mass load of 100 g
and 50 Hz in term of piezoelectric voltage.
Piezoelectric voltage generated from
PEN/Ag/PVDF-TrFe/Ag sample with
rectangular electrodes at mass load
of 80 g and frequency of 50 Hz.
As a general trend, the samples with side comb structures are characterized with
the weakest piezoelectric response, due to the smallest contact zones between
electrode and polymeric films, respectively the rectangular shape could give the
highest piezoelectric voltage due to the greatest contact area.
8. 8
0 200 400 600 800 100012001400
300
400
500
600
700
800
side comb
meander
rectangular
piezoelectricvoltage,mV
number of bends
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
0 200 400 600 800 100012001400
400
500
600
700
800
900
side comb
meander
rectangular
piezoelectricvoltage,mV
number of bends
0 200 400 600 800 100012001400
200
250
300
350
400
450
500
550
600
side comb
meander
rectangular
pipezoelectricvoltage,mV
number of bends
a) silver b) gold
c) aluminum
Stability of the piezoelectric voltage produced from PVDF-
TrFe samples with different metal electrodes and different
patterns of the electrodes at maximum mass load of 100 g
and low frequency of 20 Hz: a) silver; b) gold; c) aluminium.
• speed of degradation is strongly dependent on the
electrode shape.
• the side comb configuration exhibited the most
stable behavior (less than 2% degradation),
because the ink adhere mostly to the PEN
substrate.
• it was also found that there is relation with the
wetting ability of the electrode materials from the
polymeric ink during printing.
9. 9
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
a) b) c)
Microscopic images of PVDF-TrFe screen printed on
a) gold; b) aluminium and c) silver electrode surfaces.
• polymer printed on gold electrode is characterized with relatively low density coating,
• finer granular and more homogenous structure of the PVDF-TrFe with higher density
when printed on aluminium electrode
• polymer printed on silver exhibits the highest regularity and density. Although some
point defects could be noted, the film in between them is smooth.
Smooth, uniform surface is a precondition for stable and uniform contact at the interface
between the piezoelectric polymer and metal electrode with absence of strain effects
which tent to peal of the polymer and corrupt the electrical connection between the
coatings, thus resulting in piezoelectric voltage instability.
10. 10
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
Ag electrode Au electrode Al electrode
rectang. meand. s.comb rectang. meand. s.comb rectang. meand. s.comb
UPE, mV 916 840 446 800 768 362 528 400 258
ΔUPE @1500
bends, % 12.3 8.6 1.5 17.5 11.4 1.9 16.4 9.5 1.7
Polymer
microstru-
cture
Smooth, uniform and
dense coating
Relatively low
density coating
Fine granular, homogeneous
P, µW ~22.8 ~13 ~6.3
Comparison of the basic properties of piezoelectric harvester with three types
of metal electrodes and patterns.
11. 11
Conclusions:
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020
• Flexible polymer based energy harvesting elements were produced by simple
processing and great compatibility with variety of substrates and electrode
materials.
• It was found that the silver electrodes are more favorable in terms of produced
piezoelectric voltage and quality of the printed polymer coating on them.
• It was demonstrated that the side comb shape electrodes provide the highest
stability of the piezoelectric voltage after great number of repeating bending
cycles, despite of the electrode material nature.
• As a general conclusion, the meander electrodes could be a balanced
compromise between electrical performance and mechanical stability.
• Another key outcome of the experimental work is the obtaining of a well
controllable screen printed coating on surfaces with different wettability with
piezoelectric polymer ink, based on P(VDF-TrFE) material.
• Future work will be focused on experimental study of the frequency and
temperature dependences of the dielectric permittivity and loss factor of flexible
energy harvesting with screen printed PVDF-TrFe films with the proposed
electrodes topologies.
12. 12
THANK YOU FOR YOUR ATTENTION!
Acknowledgements: The authors acknowledge the funding support from BNSF, grant DH 07/13.
5th International Conference on Energy Engineering and Smart Materials ICEESM 2020 Barcelona, Spain| April 15-17, 2020