Unit 6 dynamic analysis bl 3
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The document contains 5 multiple choice questions regarding calculating the natural frequencies of longitudinal vibration in bars using consistent mass matrix and lumped mass matrix methods. The questions provide parameters like length, cross-sectional area, Young's modulus, and density to calculate the natural frequencies. Answers choices involving values in Hertz or radians/second are given.
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Equipment:
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Imagine a spring that is suspended from a support. When no mass is attached at the end of the
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What happens if the mass is pulled down a small distance A from the equilibrium position? The
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√
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Here, 𝑓 is the frequency in hertz (Hz), 𝑘 is the spring constant in N/m, and 𝑚 is the mass attached to
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1
𝑓
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𝑚
𝑘
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1. A standing wave is formed by two waves of equal amplitude, wavelength, and frequency travelling in opposite directions in the same medium.
2. Nodes occur at positions where the amplitude is zero, while antinodes occur at positions of maximum amplitude. The distance between nodes is half the wavelength, and between a node and adjacent antinode is a quarter wavelength.
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The document discusses wave properties of a string with a tension of 80N, linear mass density of 2 kg/m, and length of 0.3m. It is determined that:
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The document discusses superposition of waves and properties of progressive and stationary waves. It provides explanations and derivations of key concepts related to wave interference and standing waves. Specifically, it defines progressive and stationary waves, derives the equation for a stationary wave on a stretched string, and shows that only odd harmonics are present in an air column vibrating in a pipe closed at one end.
Simple Harmonic Oscillator Equipment No special safet.docx
Simple Harmonic Oscillator
Equipment:
No special safety equipment is required for this lab.
Computer with PASCO 850 Universal Interface and PASCO Capstone
PASCO Motion Sensor
Vertical Stand with horizontal cross bar.
Spring kit.
Mass hanger.
Set of masses.
Introduction
Imagine a spring that is suspended from a support. When no mass is attached at the end of the
spring, it has a length L (called its rest length). If a mass is added to the spring, its length increases by
∆L. The equilibrium position of the mass is now a distance L + ∆L from the spring’s support
What happens if the mass is pulled down a small distance A from the equilibrium position? The
spring exerts a restoring force, F = -kx, where x is the distance the spring is pulled down and k is the
force constant of the spring. The negative sign indicates that the force points opposite of the
direction of the displacement of the mass. The restoring force causes the mass to oscillate or move
up and down within a range of A from the equilibrium. The distance A or maximum displacement
from the equilibrium is called an amplitude of oscillation. The period of oscillation for simple
harmonic motion depends on the mass and the force constant of the spring.
We expect that the frequency of the oscillations will be found from:
𝑓 =
1
2𝜋
√
𝑘
𝑚
Here, 𝑓 is the frequency in hertz (Hz), 𝑘 is the spring constant in N/m, and 𝑚 is the mass attached to
the spring, in kg.
Another measure of the oscillations is the period. This is the time for one oscillation. It is:
𝑇 =
1
𝑓
= 2𝜋√
𝑚
𝑘
Note that the amplitude of oscillation is not present in the formulas above and, therefore, it has no
effect on the period and frequency of oscillation.
Objective
To verify the dependence of a period of a spring-mass system acting as a simple harmonic
oscillator on mass, spring constant, and amplitude.
Part #1. Measuring the Spring-Mass System
1. Suspend a green spring from a horizontal support rod and add enough mass to the other end
to stretch the spring so the coils do not touch.
2. Open “Motion Sensor Set Up” file located online next to the lab instructions.
3. Place the Motion Sensor directly under the spring and orient it at 90°.
4. Lightly tap the mass. Let it oscillate a few times so the mass hanger will move up-and-down
without much side-to-side motion. Make sure the coils don’t touch when the mass is at its
highest point. If they do, try to create a more gentle oscillation.
5. While the mass is oscillating, press Record to monitor the position of the mass relative to the
sensor over a period of several oscillations.
6. Rescale the data to fit the Graph window if necessary.
7. Using the Coordinate Tool, measure the time of five consecutive peaks.
8. Use the measured time to calculate the experimental value of the period of oscillations by
calculating the difference between two sequ
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First Year Undergraduate Inorganic Chemistry Workbook
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Simple Harmonic Oscillator Equipment No special safet.docx
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cnn.pptx Convolutional neural network used for image classication
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Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...
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.
Data Driven Maintenance | UReason Webinar
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.
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:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- 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
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- 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/)
官方认证美国密歇根州立大学毕业证学位证书原版一模一样
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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
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
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
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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
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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
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
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
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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
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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
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
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
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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
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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.
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› ...
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Unit 6 dynamic analysis bl 3
- 1. Unit 6 Dynamic Analysis 4 marks Student Name/ID ____________________________________________ Question 1 The natural frequency of longitudinal vibration using consistent mass matrix method with one element as shown in fig. Take E = 2 x 1011 N/m2, ρ = 7800 Kg /m2, L = 1 m A = 2 m2 Choose one answer. 1. 8770 Hz 2. 1475 Hz 3. 8000 Hz 4. 1395 Hz Question 2 The natural frequency of longitudinal vibration using lumped mass matrix method with one element as shown in fig. Take E = 2 x 1011 N/m2, ρ = 7800 Kg /m2, L = 1 m A = 2 m2 Choose one answer. 1. Both A and B 2. 7161.14 rad/sec 3. 1000 Hz 4. None of the above Question 3 Find the natural frequencies of longitudinal vibrations of the same stepped bar of areas A1= 2000 mm2 and A2= 1000 mm2 and of equal lengths (L =1 m) when it is constrained at one end. Use Lumped mass matrix approach and Take E = 2.1 x 1011 N/m2 and density = 7.8 x 103 kg/m3 Choose one answer. 1. 4750 rad/s 2. 4800 rad/s 3. 4770 rad/s 4. 4700 rad/s Question 4 Find the natural frequencies of longitudinal vibrations of the same stepped bar of areas A1= 2000 mm2 and A2= 1000 mm2 and of equal lengths (L =1 m) when it is constrained at one end. Use Lumped mass matrix approach and Take E = 2.1 x 1011 N/m2 and density = 7.8 x 103 kg/m3 Choose one answer. 1. 759 Hz 2. 785 Hz 3. 710 Hz 4. 851 Hz Question 5 Find the natural frequencies of longitudinal vibrations of the same stepped bar of areas A1= 2000 mm2 and A2= 1000 mm2 and of equal lengths (L =1 m) when it is constrained at one end. Use consistent mass matrix approach. Choose one answer. 1. w = 2.57 sq root (E/rho) 2. w = 0.995 sq root (E/rho) 3. w = sq root (E/rho) 4. Both A and C Page 1