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The abbreviation HSR can mean different things depending on the field — here are the most common uses 👇


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🚄 1. High-Speed Rail (Transportation / Civil Engineering)

HSR = High-Speed Rail
Refers to railway systems designed for trains that travel at very high speeds, usually over 250 km/h (155 mph).
✅ Example:


> Japan’s Shinkansen and France’s TGV are famous HSR systems.



🔹 Key Features:

Dedicated tracks with gentle curves and slopes

Advanced signaling systems

Electric traction

High passenger comfort



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🏗️ 2. Hot-Rolled Steel (Construction / Materials)

HSR can sometimes be used (less commonly) to mean Hot Structural Rolled steel section.
✅ Example:


> HSR sections are used in steel frameworks and columns.




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🧬 3. Health and Safety Regulation (Workplace / Law)

HSR = Health and Safety Representative
A person elected to represent workers on health and safety matters in the workplace.
✅ Example:


> The HSR inspects the site to ensure compliance with safety standards.




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📊 4. Human Subjects Research (Academia / Medicine)

HSR = Human Subjects Research
Any study involving people as participants, common in medical and behavioral research.
✅ Example:


> All HSR studies must be approved by an ethics committee.




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Would you tell me which field you’re asking about (engineering, transport, medical, etc.)?
I can then give you the exact definition and details for that context.

The abbreviation HSR can mean different things depending on the field — here are the most common uses 👇


---

🚄 1. High-Speed Rail (Transportation / Civil Engineering)

HSR = High-Speed Rail
Refers to railway systems designed for trains that travel at very high speeds, usually over 250 km/h (155 mph).
✅ Example:


> Japan’s Shinkansen and France’s TGV are famous HSR systems.



🔹 Key Features:

Dedicated tracks with gentle curves and slopes

Advanced signaling systems

Electric traction

High passenger comfort



---

🏗️ 2. Hot-Rolled Steel (Construction / Materials)

HSR can sometimes be used (less commonly) to mean Hot Structural Rolled steel section.
✅ Example:


> HSR sections are used in steel frameworks and columns.




---

🧬 3. Health and Safety Regulation (Workplace / Law)

HSR = Health and Safety Representative
A person elected to represent workers on health and safety matters in the workplace.
✅ Example:


> The HSR inspects the site to ensure compliance with safety standards.




---

📊 4. Human Subjects Research (Academia / Medicine)

HSR = Human Subjects Research
Any study involving people as participants, common in medical and behavioral research.
✅ Example:


> All HSR studies must be approved by an ethics committee.




---

Would you tell me which field you’re asking about (engineering, transport, medical, etc.)?
I can then give you the exact definition and details for that context.

The abbreviation HSR can mean different things depending on the field — here are the most common uses 👇


---

🚄 1. High-Speed Rail (T

1. Struts

2. Agenda
Preface
Struts and its components
An example
The architecture required for
Struts Applications

3. Preface
Problem we faced when designing JSP:
Familiar with HTML and expertise in web
design (the content, font, color, web page
layout etc.)
Having Programming knowledge with Java
(embedded java code in JSP)

4. Break down the
tasks with Struts

5. What is
Struts

Norwegian word meaning ostrich

A Java open source framework
especially used for web application
development.

With Struts, developers can following
the MVC design pattern to design
web application

6. What is MVC design pattern

Input ProcessingOutput

ControllerModel View
Calculation,
database
operation,
connection
with remote
systems
Application
screen, web
pages

7. Controller in Struts
Called ActionServlet
Its functions:
- Receive http request from client
(Web browser)
- Invoke Model part by calling
Action objects
- Send the JSP file returned by
Action objects back to the client

8. Model component in Struts

In Action objects

Its functions:
- Carrying out business related
processing (by itself or other objects)
- Determining the next web page to
send to the client

9. View component in Struts
Html and JSP files with Struts tags
embedded
Features provided by Struts tags:
- Sophisticated html form handling
(validation, error display etc.)
- Display localized messages
stored in a resource file on web
page (message tag)
- And many others …

10. How to get M V C parts work
together

A configuration file called struts-
config.xml in XML format

Defines Action classes, Java Beans used
in the project

Define “virtual” paths to be used in JSP
files

11. An
example
In TestWeb1.jsp:
…<struts-html:form action=“action1”>…
In struts-config.xml:
… < action path=“action1”
type=“JavaBean1”…>…
<forward name=“next1"
path="/nextpage1.jsp"/>
If changing to use another java
bean as Action class in the future,…

12. The whole process of a client
request
ActionServlet
Action object
JavaBean1
JSP / HTML
files
nextpage1.js
p
Call
“action1”
ActionForward
next1
Client
request
find

13. The architecture required for Struts Applications
Struts Applications
Struts classes / Taglib
Java Application Server
JSP / Servlet engine

14. Summary
Breakdown web development into
MVC parts
Easy to develop and maintain

15. Questions
?