Som -Lecture-1
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Thin pressure vessels experience two main stresses: hoop or circumferential stress, which resists bursting from internal pressure, and longitudinal stress from changes in vessel length or volume. Hoop stress in a thin cylinder can be calculated by considering the equilibrium of half the cylinder, where the total force from internal pressure equals the total resisting force from the hoop stress in the cylinder walls. Longitudinal stress is caused by any change in the vessel's length or volume when under pressure.
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Thin Cylinders
This document provides information about analyzing thin cylinders under pressure. It discusses the three types of stresses induced on thin cylinders subjected to internal pressure - hoop/circumferential stress, longitudinal stress, and radial pressure. For thin cylinders where the wall thickness is less than 1/20th of the internal diameter, the radial pressure is neglected. Equations are derived to calculate the circumferential and longitudinal stresses based on the internal pressure and wall thickness. The circumferential stress is twice the longitudinal stress. Strains due to these stresses are obtained using Hooke's law and Poisson's theory.
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The document discusses stresses in thin cylindrical and spherical shells. It defines a thin shell as having a wall thickness that is small compared to the internal diameter. For thin cylinders, the three main stresses are hoop (circumferential), longitudinal, and radial. Hoop stress is constant over the thickness and tends to increase the cylinder's diameter. Longitudinal stress acts along the length and tends to increase length. Radial stress is negligible for thin shells. Equations show that hoop stress equals internal pressure times internal diameter divided by twice the wall thickness, and longitudinal stress equals pressure times diameter divided by four times thickness. Internal pressure also causes changes in diameter, length, and volume of thin shells. Thin spherical shells experience uniform stress
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1) The document discusses stresses in thin and thick cylinders, including circumferential (hoop), longitudinal, and radial stresses. It also covers principal stresses.
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Diseno en ingenieria mecanica de Shigley - 8th ---HDes
descarga el contenido completo de aqui http://paralafakyoumecanismos.blogspot.com.ar/2014/08/libro-para-mecanismos-y-elementos-de.html
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This document discusses different types of vapor absorption refrigeration systems. It describes a simple system that uses an absorber, pump, generator and pressure reducing valve instead of a compressor. Ammonia vapor is absorbed by water in the absorber and heated in the generator to drive off the vapor. A practical system improves on this with accessories like an analyzer and rectifier. An Electrolux system uses ammonia, water and hydrogen as three fluids, with hydrogen increasing evaporation and ammonia as the refrigerant. Finally, lithium bromide absorption systems are mentioned.
Simple air evaporative_cooling__lect_4
Refrigeration and air conditioning systems work by removing heat from an enclosed space using a refrigeration cycle. This involves phase changes of refrigerants and the transfer of heat between different components like compressors, condensers, expansion devices, and evaporators. Proper maintenance and repair is needed to ensure refrigeration and AC systems operate efficiently and safely.
Simple air cooling_system_lect_3
This document is a lecture on refrigeration and air conditioning from the Mechanical Engineering Department at Geeta Engineering College in Naultha, Panipat. It discusses the topics of refrigeration and air conditioning. The lecture is part of a series from the college's Mechanical Engineering Department.
Simple air cooling_system_lect_3
This document is a lecture on refrigeration and air conditioning from the Mechanical Engineering Department at Geeta Engineering College in Naultha, Panipat. It discusses the topics of refrigeration and air conditioning. The lecture is part of a series from the college's Mechanical Engineering Department.
Bell coleman cycle_numericals_lect_2
This document is a lecture on refrigeration and air-conditioning from the Mechanical Engineering Department at Geeta Engineering College in Naultha Panipat. It discusses the topics that will be covered in Lecture 2 of the course.
Basics of refrigeration_lect_1
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Rainfall intensity duration frequency curve statistical analysis and modeling...
Using data from 41 years in Patna’ India’ the study’s goal is to analyze the trends of how often it rains on a weekly, seasonal, and annual basis (1981−2020). First, utilizing the intensity-duration-frequency (IDF) curve and the relationship by statistically analyzing rainfall’ the historical rainfall data set for Patna’ India’ during a 41 year period (1981−2020), was evaluated for its quality. Changes in the hydrologic cycle as a result of increased greenhouse gas emissions are expected to induce variations in the intensity, length, and frequency of precipitation events. One strategy to lessen vulnerability is to quantify probable changes and adapt to them. Techniques such as log-normal, normal, and Gumbel are used (EV-I). Distributions were created with durations of 1, 2, 3, 6, and 24 h and return times of 2, 5, 10, 25, and 100 years. There were also mathematical correlations discovered between rainfall and recurrence interval.
Findings: Based on findings, the Gumbel approach produced the highest intensity values, whereas the other approaches produced values that were close to each other. The data indicates that 461.9 mm of rain fell during the monsoon season’s 301st week. However, it was found that the 29th week had the greatest average rainfall, 92.6 mm. With 952.6 mm on average, the monsoon season saw the highest rainfall. Calculations revealed that the yearly rainfall averaged 1171.1 mm. Using Weibull’s method, the study was subsequently expanded to examine rainfall distribution at different recurrence intervals of 2, 5, 10, and 25 years. Rainfall and recurrence interval mathematical correlations were also developed. Further regression analysis revealed that short wave irrigation, wind direction, wind speed, pressure, relative humidity, and temperature all had a substantial influence on rainfall.
Originality and value: The results of the rainfall IDF curves can provide useful information to policymakers in making appropriate decisions in managing and minimizing floods in the study area.
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Null Bangalore | Pentesters Approach to AWS IAM
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
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- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
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- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
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- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
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An improved modulation technique suitable for a three level flying capacitor ...
This research paper introduces an innovative modulation technique for controlling a 3-level flying capacitor multilevel inverter (FCMLI), aiming to streamline the modulation process in contrast to conventional methods. The proposed
simplified modulation technique paves the way for more straightforward and
efficient control of multilevel inverters, enabling their widespread adoption and
integration into modern power electronic systems. Through the amalgamation of
sinusoidal pulse width modulation (SPWM) with a high-frequency square wave
pulse, this controlling technique attains energy equilibrium across the coupling
capacitor. The modulation scheme incorporates a simplified switching pattern
and a decreased count of voltage references, thereby simplifying the control
algorithm.
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本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
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6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Applications of artificial Intelligence in Mechanical Engineering.pdf
Historically, mechanical engineering has relied heavily on human expertise and empirical methods to solve complex problems. With the introduction of computer-aided design (CAD) and finite element analysis (FEA), the field took its first steps towards digitization. These tools allowed engineers to simulate and analyze mechanical systems with greater accuracy and efficiency. However, the sheer volume of data generated by modern engineering systems and the increasing complexity of these systems have necessitated more advanced analytical tools, paving the way for AI.
AI offers the capability to process vast amounts of data, identify patterns, and make predictions with a level of speed and accuracy unattainable by traditional methods. This has profound implications for mechanical engineering, enabling more efficient design processes, predictive maintenance strategies, and optimized manufacturing operations. AI-driven tools can learn from historical data, adapt to new information, and continuously improve their performance, making them invaluable in tackling the multifaceted challenges of modern mechanical engineering.
Use PyCharm for remote debugging of WSL on a Windo cf5c162d672e4e58b4dde5d797...
This document serves as a comprehensive step-by-step guide on how to effectively use PyCharm for remote debugging of the Windows Subsystem for Linux (WSL) on a local Windows machine. It meticulously outlines several critical steps in the process, starting with the crucial task of enabling permissions, followed by the installation and configuration of WSL.
The guide then proceeds to explain how to set up the SSH service within the WSL environment, an integral part of the process. Alongside this, it also provides detailed instructions on how to modify the inbound rules of the Windows firewall to facilitate the process, ensuring that there are no connectivity issues that could potentially hinder the debugging process.
The document further emphasizes on the importance of checking the connection between the Windows and WSL environments, providing instructions on how to ensure that the connection is optimal and ready for remote debugging.
It also offers an in-depth guide on how to configure the WSL interpreter and files within the PyCharm environment. This is essential for ensuring that the debugging process is set up correctly and that the program can be run effectively within the WSL terminal.
Additionally, the document provides guidance on how to set up breakpoints for debugging, a fundamental aspect of the debugging process which allows the developer to stop the execution of their code at certain points and inspect their program at those stages.
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Som -Lecture-1
- 1. THIN PRESSURE VESSELS By: Praveen Kadian
- 2. Thin cylinder Hoop or circumferential stress This is the stress which is set up in resisting the bursting effect of the applied pressure and can be most conveniently treated by considering the equilibrium of half of the cylinder as shown in Fig. 9.1.
- 4. Total force on half-cylinder owing to internal pressure = p x projected area = p x dL Total resisting force owing to hoop stress sh set up in the cylinder walls = 2 sh x Lt 2 sh Lt = pdL
- 7. Change in volume of cylinder