Plasma arc machining uses ionized gas at extremely high temperatures (11,000 to 30,000°C) to remove material from a workpiece. A plasma torch generates the ionized gas plasma from gases like hydrogen, nitrogen, or argon. The high-velocity plasma jet melts and blows away the molten metal from the workpiece. Plasma arc machining can cut hard metals and leaves a narrow kerf but has high equipment and operating costs.
Laser beam machining uses an intense, monochromatic laser beam to melt and vaporize workpiece materials. It involves focusing the laser beam using a lens to increase power density and melt or evaporate the material. When the xenon flash tube is activated, it excites chromium atoms in the ruby crystal which emit red light, stimulating additional emissions that are focused into a laser beam. This beam is used with gas to cut materials by melting and evaporating the workpiece. Laser beam machining can precisely machine very small and hard-to-cut features and is widely used for electronics, medical devices and other applications.
LASER BEAM MACHINING - NON TRADITIONAL MACHININGSajal Tiwari
Laser Beam Machining or more broadly laser material processing deals with machining and material processing like heat treatment, allowing, cladding, sheet metal bending etc. Such processing is carried out utilizing the energy of coherent photons or laser beam, which is mostly converted into thermal energy upon interaction with most of the materials. Nowadays, the laser is also finding application in regenerative machining or rapid prototyping as in processes like stereolithography, selective laser sintering etc. Laser stands for light amplification by stimulated emission of radiation. The underline working principle of a laser was first put forward by Albert Einstein in
1917 through the first industrial laser for experimentation was developed around the 1960s. The laser beam can very easily be focused using optical lenses as their wavelength ranges from half a micron to around 70 microns. The focused laser beam as indicated earlier can have power density in excess of 1 MW/mm2 . As laser interacts with the material, the energy of the photon are absorbed by the work material leading to a rapid substantial rise in local temperature. This, in turn, results in melting and vaporization of the work material and finally material removal.
Detailed explanation of Plasma arc machining, equipment of plasma arc machining, working of plasma arc machining, construction of plasma arc machining , modes of plasma gun , appliaction of PAM, Advantages of PAM, Disadvantages of PAM and some Youtube Links of PAM
Plasma arc machining uses a high-temperature plasma jet to cut metal by melting and removing material. The plasma jet is created by ionizing gas with an electric arc at temperatures between 11,000°C to 28,000°C. It works by directing the plasma jet onto the workpiece, melting the material. Gases like nitrogen, argon, and hydrogen are used to create the plasma. It can cut many metals quickly with a high removal rate but has disadvantages like tapered cuts and noise.
This document discusses laser beam welding and provides information on key concepts. It begins by defining what a laser is and describing spontaneous and stimulated emission processes. It then discusses how laser beams are produced and different types of gain media and pumping methods. The document summarizes laser beam welding techniques including conduction and keyhole welding. It provides examples of welding parameters and describes the welding process. Additional sections cover attributes, advantages, and limitations of laser beam welding as well as different laser and welding types.
The document discusses the history and process of lasers. It describes how the first laser was invented by Maiman in 1960 using a solid ruby laser. It explains that a typical laser setup includes a laser rod, mirrors, a flash tube for energy, and a lens. The laser beam is focused onto a workpiece, where it generates extremely high temperatures up to 100,000°C to melt or evaporate material for machining. Examples of laser applications include drilling small precise holes, welding thin sheets, and machining hard materials.
Laser beam machining uses an intense, monochromatic laser beam to melt and vaporize workpiece materials. It involves focusing the laser beam using a lens to increase power density and melt or evaporate the material. When the xenon flash tube is activated, it excites chromium atoms in the ruby crystal which emit red light, stimulating additional emissions that are focused into a laser beam. This beam is used with gas to cut materials by melting and evaporating the workpiece. Laser beam machining can precisely machine very small and hard-to-cut features and is widely used for electronics, medical devices and other applications.
LASER BEAM MACHINING - NON TRADITIONAL MACHININGSajal Tiwari
Laser Beam Machining or more broadly laser material processing deals with machining and material processing like heat treatment, allowing, cladding, sheet metal bending etc. Such processing is carried out utilizing the energy of coherent photons or laser beam, which is mostly converted into thermal energy upon interaction with most of the materials. Nowadays, the laser is also finding application in regenerative machining or rapid prototyping as in processes like stereolithography, selective laser sintering etc. Laser stands for light amplification by stimulated emission of radiation. The underline working principle of a laser was first put forward by Albert Einstein in
1917 through the first industrial laser for experimentation was developed around the 1960s. The laser beam can very easily be focused using optical lenses as their wavelength ranges from half a micron to around 70 microns. The focused laser beam as indicated earlier can have power density in excess of 1 MW/mm2 . As laser interacts with the material, the energy of the photon are absorbed by the work material leading to a rapid substantial rise in local temperature. This, in turn, results in melting and vaporization of the work material and finally material removal.
Detailed explanation of Plasma arc machining, equipment of plasma arc machining, working of plasma arc machining, construction of plasma arc machining , modes of plasma gun , appliaction of PAM, Advantages of PAM, Disadvantages of PAM and some Youtube Links of PAM
Plasma arc machining uses a high-temperature plasma jet to cut metal by melting and removing material. The plasma jet is created by ionizing gas with an electric arc at temperatures between 11,000°C to 28,000°C. It works by directing the plasma jet onto the workpiece, melting the material. Gases like nitrogen, argon, and hydrogen are used to create the plasma. It can cut many metals quickly with a high removal rate but has disadvantages like tapered cuts and noise.
This document discusses laser beam welding and provides information on key concepts. It begins by defining what a laser is and describing spontaneous and stimulated emission processes. It then discusses how laser beams are produced and different types of gain media and pumping methods. The document summarizes laser beam welding techniques including conduction and keyhole welding. It provides examples of welding parameters and describes the welding process. Additional sections cover attributes, advantages, and limitations of laser beam welding as well as different laser and welding types.
The document discusses the history and process of lasers. It describes how the first laser was invented by Maiman in 1960 using a solid ruby laser. It explains that a typical laser setup includes a laser rod, mirrors, a flash tube for energy, and a lens. The laser beam is focused onto a workpiece, where it generates extremely high temperatures up to 100,000°C to melt or evaporate material for machining. Examples of laser applications include drilling small precise holes, welding thin sheets, and machining hard materials.
The document discusses laser beam machining (LBM), including its principle of using a focused laser beam to remove material through vaporization and ablation. It describes the key components of lasers - the laser medium, pumping energy source, and optical feedback system. Common types of lasers used for metal processing are solid-state lasers like Nd:YAG and gas lasers like CO2. LBM provides advantages like non-contact machining, flexibility, and clean cuts. Applications include drilling small holes, engraving markings, and removing clogs.
Laser beam machining uses a high-energy, monochromatic light beam to melt and vaporize material on a workpiece's surface. It can be used to cut, drill, weld and mark materials. The document discusses the key components of laser beam and electron beam machining equipment, including the ruby crystal, xenon flash tube, cooling system, and focusing lens. It also explains the processes of how laser beams and electron beams generate and focus intense heat to remove material through melting and vaporization. Advantages include machining any material and producing precise, force-less cuts, while disadvantages include higher costs and lower removal rates compared to other processes.
Plasma arc machining (PAM) uses a plasma torch to cut metals. It was initially developed to cut difficult metals like stainless steel and aluminum. Recent improvements allow it to cut mild steel with improved cut quality compared to earlier plasma cutting. The plasma is generated by heating gas with an electric arc until it ionizes, producing free electrons and ions that conduct electricity. PAM works by melting metal with the high temperature plasma jet and blowing away the molten metal. Key parameters that affect PAM performance include the plasma torch design, the physical setup configuration, and the operating environment.
This document discusses laser beam welding, including what a laser beam is, the different types of lasers, and the laser beam welding process. It describes how laser beam welding works by focusing an intense laser beam onto metal workpieces to melt and join them. The document outlines the history of lasers from Einstein's theories to developments in the 1970s-2000s. It also explains the principles and setup of laser beam welding, the different types (conduction and keyhole welding), applications, and provides an example of repairing nuclear power plant components using ND:YAG laser welding.
This document discusses the principles and process of laser cutting. It begins by explaining the basics of how a laser works using stimulated emission to produce a coherent beam of single-wavelength light. It then describes how various materials can be used as the lasing medium, and how mirrors produce stimulated emission to generate the laser beam. The key steps of laser cutting involve focusing the laser beam using lenses to cut materials by melting, burning, or vaporizing away material. An assisting gas is used to eject molten material and cool the cut zone. Laser cutting enables precision cuts with little heat effect and no burrs or edges.
Thermal energy based machining processes like electron beam machining (EBM), laser beam machining (LBM), and plasma arc machining (PAM) work by focusing heat energy on a portion of the work material to melt and vaporize it. EBM works by focusing a beam of electrons, LBM uses a focused laser beam, and PAM uses an ionized gas plasma jet at very high temperatures. These processes can machine hard and exotic materials with high precision and no tool contact. However, they require specialized equipment, skilled operators, and have high operating costs. Common applications include cutting, drilling, welding, and surface treatment of metals.
Iwt unit 5 laser beam welding sushant bhattSRMUBarabanki
Laser beam welding uses a concentrated coherent light beam to produce coalescence of materials. It works by exciting atoms with energy which then emit photons in a stimulated emission, creating a high-energy concentrated laser beam. This beam is focused on the area to be welded, melting the metals and fusing them together. Key advantages include high weld quality, automation potential, and ability to weld hard to reach areas or dissimilar metals. The high initial costs and specialized equipment and skills required are disadvantages.
Types of laser used in laser cutting machinesMarwan Shehata
The document discusses different types of lasers used in machining. It describes solid-state lasers like ruby and YAG lasers. Gas lasers like CO2 are commonly used for machining nonmetals. Neodymium-glass lasers can produce very short, high power pulses for research. Neodymium-YAG lasers can produce over 1 kW of continuous power and are used for machining and laser fusion research. Excimer lasers have short ultraviolet wavelengths and can precisely machine materials through direct vaporization without heat damage.
Working of Laser beam machining process. Its one kind of non traditional or advanced manufacturing process.Production of laser beam and with the use of lasers how can material can be removed is to be explained over here...
This presentation discusses laser beam welding (LBW), including what a laser beam is, its properties, types of lasers, the LBW process, principles of operation, mechanics, parameters, advantages, and limitations. A laser beam is a powerful, narrow, monochromatic beam created when atoms in a lasing medium are excited by a flash tube, emitting photons. LBW uses the concentrated heat from a laser beam to fuse metals together without filler material. It offers advantages like narrow welds, low distortion, and the ability to weld dissimilar and high-alloy metals. However, it also has high costs and limitations such as difficulty welding thick joints.
Plasma arc welding is an arc welding process that uses a constricted arc set between a tungsten electrode and the workpiece to produce coalescence. The arc is constricted using a water-cooled nozzle to increase pressure and heat intensity. There are two types - non-transferred arc where the arc is independent of the workpiece, and transferred arc where the arc forms between electrode and workpiece, producing higher energy density. It offers advantages like arc stability, uniform penetration, and ability to produce fully penetrated keyhole welds on thin materials. However, it also has disadvantages like requiring special protection from radiations and noise.
The document provides information on various non-conventional machining processes. It begins with defining machining and distinguishing between conventional and non-conventional processes. Key non-conventional processes discussed include ultrasonic machining, electrical discharge machining (EDM), laser beam machining, and electrochemical grinding. Ultrasonic machining uses abrasive particles and high frequency vibrations to remove material. EDM uses electric sparks to erode material by thermal melting/vaporization. Laser beam machining focuses an intense laser to melt/vaporize workpieces. Electrochemical grinding combines material removal by abrasion and electrochemical deposition of an oxide film.
The document summarizes electron beam machining (EBM). EBM works by converting the kinetic energy of high-speed electrons into heat energy when they impinge on a workpiece. This heat energy vaporizes material. The process requires vacuum. An electron gun generates electrons that pass through magnetic lenses to focus the beam on the workpiece. Material removal occurs through melting and vaporization. EBM can machine small, complex holes and is used in aerospace and nuclear industries. It offers good finishes but has low material removal rates and high costs.
This document discusses laser beam machining (LBM), including:
- How lasers work by generating coherent, monochromatic light through stimulated emission.
- Common laser mediums like ruby, Nd:YAG, CO2, and their wavelengths.
- How laser light interacts with materials through absorption, melting, and vaporization.
- Key LBM process parameters like intensity, interaction time, and material properties.
- Applications of LBM like drilling, cutting, welding, and micro-machining.
This document discusses laser beam machining (LBM), including:
- How lasers work by generating coherent, monochromatic light through stimulated emission.
- Common laser mediums like ruby, Nd:YAG, CO2, and their wavelengths.
- How laser light interacts with materials through absorption, melting, and vaporization.
- Key LBM process parameters like intensity, interaction time, and material properties.
- Applications of LBM like drilling, cutting, welding, and micro-machining.
1. X-rays are produced when fast moving electrons are decelerated upon striking a metal target in an x-ray tube.
2. Modern x-ray tubes use a tungsten target and operate under vacuum to allow for control of the electron beam and prevent degradation of the tube.
3. X-ray output is determined by tube voltage (kVp), current (mAs), and filtration - with higher kVp and mAs producing higher quality and quantity respectively.
X-rays are produced when fast moving electrons are decelerated upon impact with a metal target in an X-ray tube. The tube contains a cathode that emits electrons and a rotating anode that absorbs the electrons. Upon electron deceleration, both characteristic X-rays specific to the target material and continuous spectrum bremsstrahlung X-rays are produced. The intensity of the X-ray beam depends on factors like target atomic number, applied voltage, and tube current. Rotating the anode helps dissipate heat and provides a consistent focal spot.
1. An x-ray tube converts electrical energy into x-radiation and heat through a process where electrons from the cathode target the anode, releasing photons.
2. The principal components of an x-ray tube are the cathode, which emits electrons, and the anode, which acts as the target. In rotating anode tubes, the anode rotates to dissipate heat during exposures.
3. Tungsten is commonly used for the filament and target due to its high melting point and ability to efficiently produce x-rays. The filament is heated through thermionic emission to release electrons, while the target converts their impact into x-radiation.
Discover the latest insights on Data Driven Maintenance with our comprehensive webinar presentation. Learn about traditional maintenance challenges, the right approach to utilizing data, and the benefits of adopting a Data Driven Maintenance strategy. Explore real-world examples, industry best practices, and innovative solutions like FMECA and the D3M model. This presentation, led by expert Jules Oudmans, is essential for asset owners looking to optimize their maintenance processes and leverage digital technologies for improved efficiency and performance. Download now to stay ahead in the evolving maintenance landscape.
Build the Next Generation of Apps with the Einstein 1 Platform.
Rejoignez Philippe Ozil pour une session de workshops qui vous guidera à travers les détails de la plateforme Einstein 1, l'importance des données pour la création d'applications d'intelligence artificielle et les différents outils et technologies que Salesforce propose pour vous apporter tous les bénéfices de l'IA.
The document discusses laser beam machining (LBM), including its principle of using a focused laser beam to remove material through vaporization and ablation. It describes the key components of lasers - the laser medium, pumping energy source, and optical feedback system. Common types of lasers used for metal processing are solid-state lasers like Nd:YAG and gas lasers like CO2. LBM provides advantages like non-contact machining, flexibility, and clean cuts. Applications include drilling small holes, engraving markings, and removing clogs.
Laser beam machining uses a high-energy, monochromatic light beam to melt and vaporize material on a workpiece's surface. It can be used to cut, drill, weld and mark materials. The document discusses the key components of laser beam and electron beam machining equipment, including the ruby crystal, xenon flash tube, cooling system, and focusing lens. It also explains the processes of how laser beams and electron beams generate and focus intense heat to remove material through melting and vaporization. Advantages include machining any material and producing precise, force-less cuts, while disadvantages include higher costs and lower removal rates compared to other processes.
Plasma arc machining (PAM) uses a plasma torch to cut metals. It was initially developed to cut difficult metals like stainless steel and aluminum. Recent improvements allow it to cut mild steel with improved cut quality compared to earlier plasma cutting. The plasma is generated by heating gas with an electric arc until it ionizes, producing free electrons and ions that conduct electricity. PAM works by melting metal with the high temperature plasma jet and blowing away the molten metal. Key parameters that affect PAM performance include the plasma torch design, the physical setup configuration, and the operating environment.
This document discusses laser beam welding, including what a laser beam is, the different types of lasers, and the laser beam welding process. It describes how laser beam welding works by focusing an intense laser beam onto metal workpieces to melt and join them. The document outlines the history of lasers from Einstein's theories to developments in the 1970s-2000s. It also explains the principles and setup of laser beam welding, the different types (conduction and keyhole welding), applications, and provides an example of repairing nuclear power plant components using ND:YAG laser welding.
This document discusses the principles and process of laser cutting. It begins by explaining the basics of how a laser works using stimulated emission to produce a coherent beam of single-wavelength light. It then describes how various materials can be used as the lasing medium, and how mirrors produce stimulated emission to generate the laser beam. The key steps of laser cutting involve focusing the laser beam using lenses to cut materials by melting, burning, or vaporizing away material. An assisting gas is used to eject molten material and cool the cut zone. Laser cutting enables precision cuts with little heat effect and no burrs or edges.
Thermal energy based machining processes like electron beam machining (EBM), laser beam machining (LBM), and plasma arc machining (PAM) work by focusing heat energy on a portion of the work material to melt and vaporize it. EBM works by focusing a beam of electrons, LBM uses a focused laser beam, and PAM uses an ionized gas plasma jet at very high temperatures. These processes can machine hard and exotic materials with high precision and no tool contact. However, they require specialized equipment, skilled operators, and have high operating costs. Common applications include cutting, drilling, welding, and surface treatment of metals.
Iwt unit 5 laser beam welding sushant bhattSRMUBarabanki
Laser beam welding uses a concentrated coherent light beam to produce coalescence of materials. It works by exciting atoms with energy which then emit photons in a stimulated emission, creating a high-energy concentrated laser beam. This beam is focused on the area to be welded, melting the metals and fusing them together. Key advantages include high weld quality, automation potential, and ability to weld hard to reach areas or dissimilar metals. The high initial costs and specialized equipment and skills required are disadvantages.
Types of laser used in laser cutting machinesMarwan Shehata
The document discusses different types of lasers used in machining. It describes solid-state lasers like ruby and YAG lasers. Gas lasers like CO2 are commonly used for machining nonmetals. Neodymium-glass lasers can produce very short, high power pulses for research. Neodymium-YAG lasers can produce over 1 kW of continuous power and are used for machining and laser fusion research. Excimer lasers have short ultraviolet wavelengths and can precisely machine materials through direct vaporization without heat damage.
Working of Laser beam machining process. Its one kind of non traditional or advanced manufacturing process.Production of laser beam and with the use of lasers how can material can be removed is to be explained over here...
This presentation discusses laser beam welding (LBW), including what a laser beam is, its properties, types of lasers, the LBW process, principles of operation, mechanics, parameters, advantages, and limitations. A laser beam is a powerful, narrow, monochromatic beam created when atoms in a lasing medium are excited by a flash tube, emitting photons. LBW uses the concentrated heat from a laser beam to fuse metals together without filler material. It offers advantages like narrow welds, low distortion, and the ability to weld dissimilar and high-alloy metals. However, it also has high costs and limitations such as difficulty welding thick joints.
Plasma arc welding is an arc welding process that uses a constricted arc set between a tungsten electrode and the workpiece to produce coalescence. The arc is constricted using a water-cooled nozzle to increase pressure and heat intensity. There are two types - non-transferred arc where the arc is independent of the workpiece, and transferred arc where the arc forms between electrode and workpiece, producing higher energy density. It offers advantages like arc stability, uniform penetration, and ability to produce fully penetrated keyhole welds on thin materials. However, it also has disadvantages like requiring special protection from radiations and noise.
The document provides information on various non-conventional machining processes. It begins with defining machining and distinguishing between conventional and non-conventional processes. Key non-conventional processes discussed include ultrasonic machining, electrical discharge machining (EDM), laser beam machining, and electrochemical grinding. Ultrasonic machining uses abrasive particles and high frequency vibrations to remove material. EDM uses electric sparks to erode material by thermal melting/vaporization. Laser beam machining focuses an intense laser to melt/vaporize workpieces. Electrochemical grinding combines material removal by abrasion and electrochemical deposition of an oxide film.
The document summarizes electron beam machining (EBM). EBM works by converting the kinetic energy of high-speed electrons into heat energy when they impinge on a workpiece. This heat energy vaporizes material. The process requires vacuum. An electron gun generates electrons that pass through magnetic lenses to focus the beam on the workpiece. Material removal occurs through melting and vaporization. EBM can machine small, complex holes and is used in aerospace and nuclear industries. It offers good finishes but has low material removal rates and high costs.
This document discusses laser beam machining (LBM), including:
- How lasers work by generating coherent, monochromatic light through stimulated emission.
- Common laser mediums like ruby, Nd:YAG, CO2, and their wavelengths.
- How laser light interacts with materials through absorption, melting, and vaporization.
- Key LBM process parameters like intensity, interaction time, and material properties.
- Applications of LBM like drilling, cutting, welding, and micro-machining.
This document discusses laser beam machining (LBM), including:
- How lasers work by generating coherent, monochromatic light through stimulated emission.
- Common laser mediums like ruby, Nd:YAG, CO2, and their wavelengths.
- How laser light interacts with materials through absorption, melting, and vaporization.
- Key LBM process parameters like intensity, interaction time, and material properties.
- Applications of LBM like drilling, cutting, welding, and micro-machining.
1. X-rays are produced when fast moving electrons are decelerated upon striking a metal target in an x-ray tube.
2. Modern x-ray tubes use a tungsten target and operate under vacuum to allow for control of the electron beam and prevent degradation of the tube.
3. X-ray output is determined by tube voltage (kVp), current (mAs), and filtration - with higher kVp and mAs producing higher quality and quantity respectively.
X-rays are produced when fast moving electrons are decelerated upon impact with a metal target in an X-ray tube. The tube contains a cathode that emits electrons and a rotating anode that absorbs the electrons. Upon electron deceleration, both characteristic X-rays specific to the target material and continuous spectrum bremsstrahlung X-rays are produced. The intensity of the X-ray beam depends on factors like target atomic number, applied voltage, and tube current. Rotating the anode helps dissipate heat and provides a consistent focal spot.
1. An x-ray tube converts electrical energy into x-radiation and heat through a process where electrons from the cathode target the anode, releasing photons.
2. The principal components of an x-ray tube are the cathode, which emits electrons, and the anode, which acts as the target. In rotating anode tubes, the anode rotates to dissipate heat during exposures.
3. Tungsten is commonly used for the filament and target due to its high melting point and ability to efficiently produce x-rays. The filament is heated through thermionic emission to release electrons, while the target converts their impact into x-radiation.
Discover the latest insights on Data Driven Maintenance with our comprehensive webinar presentation. Learn about traditional maintenance challenges, the right approach to utilizing data, and the benefits of adopting a Data Driven Maintenance strategy. Explore real-world examples, industry best practices, and innovative solutions like FMECA and the D3M model. This presentation, led by expert Jules Oudmans, is essential for asset owners looking to optimize their maintenance processes and leverage digital technologies for improved efficiency and performance. Download now to stay ahead in the evolving maintenance landscape.
Build the Next Generation of Apps with the Einstein 1 Platform.
Rejoignez Philippe Ozil pour une session de workshops qui vous guidera à travers les détails de la plateforme Einstein 1, l'importance des données pour la création d'applications d'intelligence artificielle et les différents outils et technologies que Salesforce propose pour vous apporter tous les bénéfices de l'IA.
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...IJECEIAES
Medical image analysis has witnessed significant advancements with deep learning techniques. In the domain of brain tumor segmentation, the ability to
precisely delineate tumor boundaries from magnetic resonance imaging (MRI)
scans holds profound implications for diagnosis. This study presents an ensemble convolutional neural network (CNN) with transfer learning, integrating
the state-of-the-art Deeplabv3+ architecture with the ResNet18 backbone. The
model is rigorously trained and evaluated, exhibiting remarkable performance
metrics, including an impressive global accuracy of 99.286%, a high-class accuracy of 82.191%, a mean intersection over union (IoU) of 79.900%, a weighted
IoU of 98.620%, and a Boundary F1 (BF) score of 83.303%. Notably, a detailed comparative analysis with existing methods showcases the superiority of
our proposed model. These findings underscore the model’s competence in precise brain tumor localization, underscoring its potential to revolutionize medical
image analysis and enhance healthcare outcomes. This research paves the way
for future exploration and optimization of advanced CNN models in medical
imaging, emphasizing addressing false positives and resource efficiency.
Comparative analysis between traditional aquaponics and reconstructed aquapon...bijceesjournal
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
AI for Legal Research with applications, toolsmahaffeycheryld
AI applications in legal research include rapid document analysis, case law review, and statute interpretation. AI-powered tools can sift through vast legal databases to find relevant precedents and citations, enhancing research accuracy and speed. They assist in legal writing by drafting and proofreading documents. Predictive analytics help foresee case outcomes based on historical data, aiding in strategic decision-making. AI also automates routine tasks like contract review and due diligence, freeing up lawyers to focus on complex legal issues. These applications make legal research more efficient, cost-effective, and accessible.
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELijaia
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Software Engineering and Project Management - Software Testing + Agile Method...Prakhyath Rai
Software Testing: A Strategic Approach to Software Testing, Strategic Issues, Test Strategies for Conventional Software, Test Strategies for Object -Oriented Software, Validation Testing, System Testing, The Art of Debugging.
Agile Methodology: Before Agile – Waterfall, Agile Development.
2. Plasma
When a flowing gas is heated to a sufficiently high temperature to become partially
ionized, it is known as ‘plasma’. This is virtually a mixture of free electrons, positively
charged ions and neutral atoms.
PAM is a material removal process in which the material is removed by ionized gas of
high temperature (11,000 to 30,000 C) which applied by a high-velocity jet on the
workpiece.
4. WorkingPrinciple
The principle of plasma arc machining is in a plasma torch, known as the gun or plasma-
Tron, a volume of gas such as H2, N2, O2, etc. is passed through a small chamber in which
a high-frequency spark (arc) is maintained between the tungsten electrode (cathode) and
the copper nozzle (anode), both of which are water-cooled.
When DC power is given to the circuit, a strong arc forms between the cathode
(electrodes) and anode (nozzle).
Following that, the chambers are filled with gas. This gas may be a mixture of hydrogen,
nitrogen, argon, or other gases selected based on the metal being worked.
The gas used in the process is heated by an arc formed between the cathode and the
anode. This gas heats at extremely high temperatures ranging from 11000 ° C to 28000 ° C.
5. When the arc makes contact with the gas, the electrons of the arc collide with the
molecules of the gas, causing the gas molecules to separate into different atoms.
Because of the high temperatures produced by the arc, electrons from some atoms are
displaced, the atoms are ionized (electrically charged), and the gas is converted into
plasma. A significant amount of thermal energy is released as the gas is ionized.
After the gas has been ionized, the high temperature ionized gas is directed with high
velocity towards the workpiece.
As the plasma jet approaches the workpiece, the plasma melts it and the molten metal
is blown away by the high-velocity gas.
6. Components Of PAM
Plasma Gun
Gases, like plasma, are used to make nitrogen, argon, hydrogen, or a mixture of these gases.
The plasma gun consists of a tungstens electrode that is fitted into the chamber.
The electrodes are given negative polarity, and the gun nozzle is given positive polarity.
The supply of gases remains in the gun. A strong arc is established between two terminals, anodes, and
cathode. There is a collision between the molecules of the gas and electrons of the established arc.
Power Supply and Terminals
DC is used to develop two terminals in a plasma gun.
A tungsten electrode is inserted into the gun, and a cathode is made, and the gun nozzle is the anode.
A massive potential difference is applied to the electrodes to develop a plasma state of gases.
7. Cooling Mechanism
Because hot gases continuously exit the nozzle, there is a risk of overheating. To prevent the nozzle from
overheating, it is surrounded by a water jacket.
Tooling
In PAM, there is no visible tool. A focused spray of hot, plasma-state gases is used as a cutting tool.
Stand off Distance
Stand-off distance is the distance between the nozzle tip and the workpiece. When the stand-off distance
increases, the depth of penetration is reduced. The optimum stand-off distance depends on the thickness of
the metal being machined and varies from 6 to 10 mm.
8. Advantages
In plasma arc machining, hard and brittle metals can be made easily.
It can be used to cut any metal.
Computer numerical controlled PBM is used for profile cutting of metals that are difficult to tackle by
oxyacetylene gas technique such as stainless steel and aluminum.
There being no contact between the tool and work piece, only a simply supported work piece structure is
enough.
Due to the higher heat production and the plasma jet allows faster travel speeds
It leaves narrower kerf
9. Limitations
Plasma arc machining equipment setup is expensive
Metallurgical changes occur on the surface of the workpiece.
Inert gas consumption is high.
Shielding is required as oxidation and scale formation occur.
Safety precautions are necessary for the operator and those in near by areas.
10. Applications
It is mostly used for cryogenic, high-temperature corrosion-resistant alloys.
It is also used in the case of titanium plates up to 8 mm thickness.
PAM is used in nuclear submarine pipe systems and welding steel rocket motor cases.
PAM is a staple for applications related to stainless tubes and tube mills.
14. Material Removal Mechanism
Laser Beam Machining (LBM) is a form of machining process in which laser beam is used for the
machining of metallic and non-metallic materials. In this process, a laser beam of high energy is made
to strike on the workpiece, the thermal energy of the laser gets transferred to the surface of the w/p
(workpiece). The heat so produced at the surface heats, melts and vaporizes the materials from the
w/p. Light amplification by stimulated emission of radiation is called LASER.
16. Stimulated Emission
When the electrons in the excited state do not jumps back to the ground state by its own. This situation is called
meta-stable state. When a photon is fired to the meta- stable state of atoms, this stimulates an electron at excited
state and it jumps back to its ground state giving of two photons (one photon that we fired and other produced by
the electron). These two photons stimulate other atoms electrons and produces more photons- a chain reactions
starts and number of photon increases. This process is called stimulated emission.
17. Types of Laser
1. Gas Lasers: In these types of laser, gases are used as the medium to produce lasers. The commonly used gases are He-
Ne, argon and Co2.
2. Solid State Lasers: The media of the solid state lasers are produced by doping a rare element into a host material.
Ruby laser is an example of solid state laser in which ruby crystal is used as medium for the generation of laser beam.
The other media used in the solid state lasers are
(i) YAG: For yttrium aluminum garnet which a type of crystal.
(ii) Nd:YAG – Refers to neodymium-doped yttrium aluminum garnet crystals
18. Working Principle
In this process, the Laser Beam is called monochromatic light, which is made to focus on the workpiece to be
machined by a lens to give extremely high energy density to melt and vaporize any material.
The Laser Crystal (Ruby) is in the form of a cylinder as shown in the above figure or Diagram with flat reflecting ends
which are placed in a flash lamp coil of about 1000W.
The Flash is simulated with the high-intensity white light from Xenon. The Crystal gets excited and emits the laser
beam which is focused on the workpiece by using the lens.
The beam produced is extremely narrow and can be focused to a pinpoint area with a power density of 1000
kW/cm2. Which produces high heat and the portion of the metal is melted and vapourises.
19. Power Supply:
The electric current or power is supplied to the system. A high voltage power system is used in laser beam machining. It
will give initial power to the system after that reaction starts in a laser that will machine the material. There is a high
voltage supply so that pulses can be initiated easily.
Capacitor:
During the major portion of the cycle, a capacitor bank charges and releases the energy during the flashing process. The
capacitor is used for the pulsed mode for charging and discharging.
Flash Lamps:
It is the electric arc lamp that is used to produce extremely intense production of white light which is a coherent high-
intensity beam. It is filled with gases that ionize to form great energy that will melt and vaporizes the material of the
workpiece.
20. Reflecting Mirror:
Reflecting Mirror are two main types of internal and external. Internal mirrors also called a resonator that is
used to generate maintain and amplify the laser beam. It is used to direct the laser beam towards the
workpiece.
Laser Light Beam:
It is the beam of radiation produced by the laser through the process of optical amplification based on the coherence of
light created by the bombarding of active material.
Ruby Crystal:
Ruby laser produces a series of coherent pulses which is deep red in color. It achieves by the concept of population
inversion. It is a three-level solid-state laser.
Lens:
Lenses are used to focus the laser beam onto the workpiece. First laser light will enter into the expanding lens and then
into the collimating lens which makes the light rays parallel and the expanding lens expands the laser beams to the
desired size.
21. Applications of Laser Beam Machining
Laser Machining is used for making very small holes, Welding non-conductive and refractory material.
It is best suited for brittle material with low conductivity and Ceramic, Cloth, and Wood.
Laser Machining is also used in surgery, micro-drilling operations.
Spectroscopic Science and Photography in medical science.
It is also used in mass macro machining production.
Cutting complex profiles for both thin and hard materials.
It is used to make tiny holes. Example: Nipples of the baby feeder.
22. Advantages:
In Laser Beam Machining any material including non-metal also can be machined.
Extremely small holes with good accuracy can be machined.
The tool wear rate is very low.
There is no mechanical force on the work.
Soft materials like plastic, rubber can be machined easily.
It is a very flexible and easily automated machine.
The heat-affected zone is very small.
Laser Machining gives a very good surface finish.
Heat treated and magnetic materials can be welded, without losing their properties.
The precise location can be ensured on the workpiece.
23. Disadvantages:
Laser Machining cannot be used to produce a blind hole and also not able to drill too deep holes.
The machined holes are not round and straight.
The capital and maintenance cost is high.
There is a problem with safety hazards.
The overall efficiency of the Laser beam machining is low.
It is limited to thin sheets.
The metal-removing rate is also low.
The flash lamp life is short.
There is a limited amount of metal removing during the process.