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Differential scanning calorimetry (DSC) is a technique used to investigate the response of
polymers to heating. DSC can be used to study the melting of a crystalline polymer or
the glass transition.
The DSC set-up is composed of a measurement chamber and a computer. Two pans
are heated in the measurement chamber. The sample pan contains the material being
investigated. A second pan, which is typically empty, is used as a reference. The computer
is used to monitor the temperature and regulate the rate at which the temperature of the
pans changes. A typical heating rate is around 10 ◦C/min.
The rate of temperature change for a given amount of heat will differ between the two
pans. This difference depends on the composition of the pan contents as well as physical
changes such as phase changes. For the heat flux DSC used in this lab course, the system
varies the heat provided to one of the pans in order to keep the temperature of both pans
the same. The difference in heat output of the two heaters is recorded. The result is a
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relation to a change in temperature in a controlled environment is measured. Heat is used in TGA to force
reactions and physical changes in materials. Thermogravimetric analysis (TGA) is a reliable method to determine
endotherms, exotherms, measure oxidation processes, thermal stability, decomposition points of explosives,
characteristics of polymers, solvent residues, the level of organic and inorganic components of a mixture,
degradation temperatures of a material, and the absorbed moisture content of materials. Materials analyzed by
thermogravimetric analysis include explosives, petroleum, chemicals, biological samples, polymers, composites,
plastics, adhesives, coatings, organic materials, and pharmaceuticals.The thermogravimetric analysis instrument usually consists of a high-precision balance and sample pan.
The pan holds the sample
material and is located in a
furnace or oven that is
heated or cooled during the
experiment. A thermocouple
is used to accurately control
and measure the
temperature within the oven.
The mass of the sample is
constantly monitored during
the analysis. An inert or
reactive gas may be used to
purge and control the
environment. The analysis is
performed by gradually
raising the temperature and plotting the
substances weight against temperature. A
computer is utilized to control the
instrument and to process the output
curves.
TGA and DSC ppt
This document discusses Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). TGA measures the change in weight of a sample during heating or cooling, while DSC measures the heat absorbed or released by a sample during phase transitions or chemical reactions. Both techniques provide information about physical and chemical changes in materials as functions of temperature. The document describes the principles, instrumentation, experimental procedures, sources of error, and applications of TGA and DSC for characterizing materials.
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Differential thermal analysis & Differential Scanning Calorimetry
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原版制作(Humboldt毕业证书)柏林大学毕业证学位证一模一样
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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微bwp0011
【主营项目】
一.毕业证【微bwp0011】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
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◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【微bwp0011】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
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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* Registration is currently open *
Call for Research Papers!!!
Free – Extended Paper will be published as free of cost.
3rd International Conference on Artificial Intelligence Advances (AIAD 2024)
July 13 ~ 14, 2024, Virtual Conference
Webpage URL: https://aiad2024.org/index
Submission Deadline: June 22, 2024
Submission System URL:
https://aiad2024.org/submission/index.php
Contact Us:
Here's where you can reach us : aiad@aiad2024.org (or) aiadconference@yahoo.com
WikiCFP URL: http://wikicfp.com/cfp/servlet/event.showcfp?eventid=180509©ownerid=171656
#artificialintelligence #softcomputing #machinelearning #technology #datascience #python #deeplearning #tech #robotics #innovation #bigdata #coding #iot #computerscience #data #dataanalytics #engineering #robot #datascientist #software #automation #analytics #ml #pythonprogramming #programmer #digitaltransformation #developer #promptengineering #generativeai #genai #chatgpt #artificial #intelligence #datamining #networkscommunications #robotics #callforsubmission #submissionsopen #deadline #opencall #virtual #conference
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原版一模一样【微信：741003700 】【(uoft毕业证书)加拿大多伦多大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
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【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
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
办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(uoft毕业证书)加拿大多伦多大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
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/)
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Fluke Solar Application Specialist Will White is presenting on this engaging topic:
Will has worked in the renewable energy industry since 2005, first as an installer for a small east coast solar integrator before adding sales, design, and project management to his skillset. In 2022, Will joined Fluke as a solar application specialist, where he supports their renewable energy testing equipment like IV-curve tracers, electrical meters, and thermal imaging cameras. Experienced in wind power, solar thermal, energy storage, and all scales of PV, Will has primarily focused on residential and small commercial systems. He is passionate about implementing high-quality, code-compliant installation techniques.
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Dilatometer.pptx
- 1. The Basics of Dilatometer Theory and Data Analysis 1
- 2. Contents 1 • What is dilatometry 2 • Thermal Expansion • Experimental Setup 3 • Dilatometry Samples 4 • Applications 5 • Methodology 6 • Data Analysis 2
- 3. 3 Thermal Expansion & Thermal Expansion Coefficient
- 4. Thermal Expansion - Background Thermal Expansion Background Most materials undergo dimensional changes during heating or cooling. Generally, the dimensions of a solid or liquid increase during heating and decrease during cooling. There are only few exceptions. Sintering, Shrinkage • During phase transitions or during a sintering process, substances can show a shrinkage. • During a sintering process, such shrinkages steps are irreversible and lead to a permanent increase in density and robustness. 4
- 5. Thermal Expansion - Background 5
- 6. What is Dilatometry? Dilatometry (DIL) is a technique in which a dimensional change of a substance under negligible load is measured (e.g. expansion measurement or shrinkage measurement) as a function of temperature while the substance is subjected to a controlled temperature program in a specified atmosphere. 7
- 8. 9 Dilatometer Overview: -263℃ up to 2800℃
- 9. 10 Measuring System for DIL
- 12. 13 Furnace Program for DIL
- 13. Dilatometry Samples Metals & Alloys Ceramics Polymers Green Bodies & Clay Thin Films Glasses Solids , Powders, Liquids 14
- 14. Dilatometry Technical Specification Sample length: 20 mm maximum Maximum sample diameter: 7 mm Maximum change of length: 4 mm Length resolution: 10 nm 15 Sample holder: Fused silica Atmosphere: air, vacuum, Liquid nitrogen Temperature range: 100 – 1000°C Maximum heating rate: 100°C/min
- 15. Applications Linear Thermal Expansion Coefficient of Thermal Expansion Phase Transition Temperatures Sintering Temperatures Glass Transition Temperatures Dilatometry Softening points Volume expansion Density Change Sintering Kinetics 16
- 16. Interpretation of Dilatometer Graph THERMAL EXPANSION DL/LO TEMPERATURE C Co-efficient of Thermal Expansion dl/dT T1 T2 Axis Labels Baseline Expansion and Shrinkage Slope Inflection Points Plateaus Peaks and Troughs Transition Temperatures Comparisons Data Analysis 18
- 17. 20 Thermal Expansion Coefficient of LaCrO3
- 18. Determination of the Glass Transition 21
- 19. Glass Transition of Polymer Comparison TMA and DSC 22
- 20. 23 Glass — Thermal Expansion, Glass Transition, Softening Presented in the figure are three tests on the same type of glass but from different batches. It can clearly be seen that the coefficients of thermal expansion are in good agreement within the instrument’s uncertainty boundaries. The Glass Transition Temperature temperature and the softening point of sample #3 (blue curve) show slightly lower values, indicating a slightly different composition.
- 23. Thin Film- Epoxy Film on Glass Substrate 26
- 25. 28 Iron – Phase Transition The sample was measured at a heating rate of 5 K/min in a helium atmosphere. At 906°C (peak temperature in the physical alpha) a shrinkage step was detected. This is due to a change in the lattice structure (bcc -> fcc). Another change in the lattice structure (fcc -> bcc) was detected at 1409°C. The deviation between the measured and literature transition temperatures is due to a small impurity content.
- 28. 31 Density Change – Powders & Melts
- 29. 32
- 30. 33 Optimization of Casting Process
- 31. 34 Density Thermal behavior of an aluminum-based alloy, heating rate: 5 K/min, He atmosphere, alumina sample holder, alumina container. Displayed are the Volumetric Expansion (black solid line), the curve of the calculated density change (red solid line) as well as the c-DTA® curve (blue dashed line).
- 32. Conclusion • What is dilatometry and what is it used to measure • Basic setup of a dilatometer • Analysis of data from the instrument 35
- 33. Thank You..! 36