Thiết kế biểu đồ thực thể liên kết và tập lược đồ cơ sở dữ liệu quan hệ cho các bài toán quản lý sau:
Bài toán 1. Bạn cần một cơ sở dữ liệu để quản lý thông tin về các tạp chí. Với mỗi tạp chí bạn cần quản lí tên tạp chí, số ISSN (mã số công bố của tạp chí), số phát hành và năm phát hành. Dữ liệu về các bài báo trong tạp chí bao gồm: tiêu đề bài báo, trang bắt đầu và trang kết thúc của bài báo trong tạp chí (nghĩa là bài báo bắt đầu từ trang nào, và kết thúc ở trang nào trong tạp chí). Giả thiết rằng không có hai bài báo nào có cùng tiêu đề. Mỗi bài báo được viết bởi một vài tác giả. Mỗi tác giả bạn sẽ lưu các thông tin về tên, địa chỉ email và địa chỉ cơ quan.

Answers

Answer 1

Answer:

sorry please write in English than i help.you i don't understand your language


Related Questions

Create a timeline of the evolution of computers.

Doesn’t have to be extra or super detailed

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Answer:

The computer was born not for entertainment or email but out of a need to solve a serious number-crunching crisis. By 1880, the U.S. population had grown so large that it took more than seven years to tabulate the U.S. Census results.1937: J.V. Atanasoff, a professor of physics and mathematics at Iowa State University, attempts to build the first computer without gears, cams, belts or shafts.1943-1944: Two University of Pennsylvania professors, John Mauchly and J. Presper Eckert, build the Electronic Numerical Integrator and Calculator (ENIAC). Considered the grandfather of digital computers, it fills a 20-foot by 40-foot room and has 18,000 vacuum tubes.1985: Microsoft announces Windows, according to Encyclopedia Britannica. This was the company's response to Apple's GUI. Commodore unveils the Amiga 1000, which features advanced audio and video capabilities.2006: Apple introduces the MacBook Pro, its first Intel-based, dual-core mobile computer, as well as an Intel-based iMac. Nintendo's Wii game console hits the marke

Explanation:

This could be the computer development;

From using
Vacuum Tubes to > Transistors > Integrated Circuits > Micro Processors and to the new developping Artificial Intelligence

ACTIVITY NI MATCHING TYPE Directions: Match Column A with Column B. Write the letter of the correct answer on the space provided before the number a. Trion your nails b. visits the dentist c. scrub your hands with soap and water d. wear deodorant taking a bath 18111411 hely wear suitable clothes at work g. avoidis open wounds while working with food h. Regularly out your hair. 1. Use a seperate towel or cloth wiping hands. . keep sanitizer. 10.​

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Answer:

Mark me a brainless plss i need that i am blink plss

What is a segmentation?

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Answer:

Segmentation means to divide the marketplace into parts, or segments, which are definable, accessible, actionable, and profitable

ive atleast 10 examples of FAKE anti-virus and anti- spyware software

Answers

Answer:

Explanation:

protegent

spysheriff

doctor antivirus

winwebsec

spybouncer

thespybot

malwarealarm

macsweeper

spywarestop

spylocked

Which statement correctly describes one aspect of the team's commitment at the end of PI Planning?

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The statement that describes an aspect of the team's commitment at the end of PI Planning is to maintain predictability with uncommitted objectives.

A program increment (PI) simply means a timebox during which an agile release train helps in delivering incremental value in the form of tested and working systems and software.

A program increment (PI) is usually eight to twelve weeks long. An aspect of the team's commitment at the end of PI Planning is to maintain predictability with uncommitted objectives.

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A double-ended queue, or deque, is a data structure consisting of a list of items on which the operations are defined.

a. True
b. False

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Answer:

true

Explanation:

what does c++ programming mean?

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Answer:

It's an internal joke to say the language is basically C with some extra stuff (like classes)

the "++" is short for

C += 1 or

C = C + 1 which is a common calculation among programmers so they named it C++ to be a more commercial and attractive name than "C with classes"

Explanation:

Which is an example of a demand account

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Answer:  savings account investment account credit account checking account Checking account is an example of a demand account.

What is Microsoft Excel?​

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Answer:

The most popular and widely used spread sheet program, developed by Microsoft Corporation of USA is called Microsoft Excel.

Explanation:

Thanks!!!!!

Explanation:

Microsoft Excel is a spreadsheet developed by Microsoft for Windows, macOS, Android and iOS. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications.

Also THANKS for thanking my answers

How have computers affected education?​

Answers

Explanation:

Computers have supplied infinite resources for learning and made education more flexible and easy to access. Students can now gain knowledge and information not only from classroom assignments and libraries but also from available online resources.

Computers provide teachers and students the means to communicate quickly via email. Online grading systems also make it easier to view and audit a student's progress. In addition, computers open doors to social media, providing students and teachers tools to interact, collaborate and communicate.

To what extent do you agree with the assertion that “Collection development begins with community analysis”. (Give reasons to buttress your answer).

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I completely agree that Collection development begins with community analysis; this is because the goal of collection development is to meet the information needs of everybody in a user community.

Collection development is a term used to describe the gathering and maintenance of library materials and resources such as textbooks, audiovisuals, and electronic materials for the community users to assess.

Collection development involves many processes, but it is better to begin with community analysis to know what type of resources, information, or materials is needed in that community.

It is from the community analysis and conclusion reached; other steps can then be followed sequentially.

Also, note that through community analysis, one can determine the present users of the library and their major interests.

Hence, in this case, it is concluded that community analysis is vital in the collection development in library and information management.

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Classify the following as cross-section or time-series data: Gross sales of 200 ice cream parlors in July 2009

Answers

Answer:

let us start by stating the definitions of Time series data and Cross sectional data. TIME SERIES DATA: The data which is collected chronologically over time is known as time series data.

Explanation:

Btw brainliest me plss

7. What was the original purpose of the network that would become the internet?
A shopping and commerce
B. social media
C. digitizing books
D. military and academic communication

Answers

Answer:

D, Mulitary and Academic communicationj

Explanation: Just did this

The process of generating an image from a 2D or 3D model using computer programs is called ........

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Answer:

endering or image synthesis is the process of generating a photorealistic or non-photorealistic image from a 2D or 3D model by means of a computer program. ... The term "rendering" is analogous to the concept of an artist's impression of a scene.

In PC relative addressing mode, the PC and constant need to be added to
calculate the branch address.
In immediate addressing mode, the operand is a register.
a) Only I
b) Only II
Both I and I are true
d) Neither I nor II​

Answers

l think is the right answer is (a)

Define a class named Bits that holds a single integer variable. You will use this integer simply as a container of bits. The number of bits you can support depends on the type of integer you use. We will use an unsigned long long, which on most platforms occupies 64 bits.

Answers

In two or more integer plat forms

HELP ASAP PLZ PLZ PLZTegan is playing a computer game on her smartphone and the battery is getting low. When she goes to charge her phone, she notices that the cord is broken. What can Tegan do to solve her problem?
Plug in the smartphone to charge.
Put tape around the broken part of the cord.
Ask a trusted adult for help replacing the cord.
Use the laptop charger instead.

Answers

Answer:

3rd choice

Explanation:

Describe psychographic differences among the past five generations of Americans that you learned about in this course. What type of game would you create for each generation based on that generation’s psychographic characteristics? Give reasons for your choices. You may do some online research to find existing games (if any) that may appeal to each generation of players.

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Answer:

sorry I don't know about this question

Steps to open ex cel

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Answer:

type in goo gle, e x cel, and open

How does a computer virus spread?​

Answers

Some most common methods are phishing emails, USB and removable media

what are computer specification​

Answers

Answer:

They are basically all of your computer's information. It displays everything that has to do with the computer like model name, processor speed and etc.

They are basically all of your computer

10. Ari and Caleb are best friends. One morning, Ari sees Caleb in the hallway at school and says hi. Caleb barely looks up, and when Ari asks if something is wrong, Caleb just shrugs. What type of communication is Caleb exhibiting?
A aggressive
Bnonverbal
C interpersonal
D assertive​

Answers

He is showing nonverbal communication meaning he is not speaking yet communications without speaking through his actions so it’s:
B
Hope this helps friend!

full meaning of XP in computer​

Answers

Answer → eXPerience

Select the correct locations on the image.
In which of these images would the rule of thirds become an evaluating factor?

Answers

Answer:

apple

Explanation:

the one of the apple is right

Which term describes the variable x in this program?

x = int(input("Enter a score or enter -1 to end. "))

while x != -1:

x = int(input("Enter a score or enter -1 to end. "))

an iteration counter
a sentinel value
a string counter
a loop counter

Answers

Answer: a sentinel value

Explanation:

a sentinel value is a value that is used as a condition to end the program. notice that it says "enter -1 to end"

Could some please answer the question in the pictures? Thank you!! I will also give your brainliest if you give me the right answers!!

Answers

Answer:

1

Explanation:

per page must have 1 body

a. Get a value for x from the user.

b. Test to determine if x is positive. If not, tell the user that he or she has made a mistake.

c. Take the cube root of x.

d. Do Steps 1.1, 1.2, and 1.3 x times

Answers

Program (Python):-

[tex]\tt x=int(input("Enter\:your\:number:"))[/tex]

[tex]\tt if \:x<0:[/tex]

[tex]\tt \qquad print("You\:have\:made\: mistake")[/tex]

[tex]\tt else:[/tex]

[tex]\qquad\tt print("Well\:done")[/tex]

[tex]\tt cuberoot=x**1/3[/tex]

[tex]\tt print("Cube\:root=",cuberoot)[/tex]

[tex]\tt for\:i\:in\:range(x):[/tex]

[tex]\qquad\tt print(x)[/tex]

Sample output

Enter your number:-8

You have made mistake

Cuberoot=-2

-8

-8

-8

-8

-8

-8

-8

-8

The percentages in the table represent the performance change from the previous month. Consider the impact of each metric on customer questions.

Answers

Metrics may be described as measures used to evaluate the performance or activity of seller, employee organization and so on. They help to better understand underlying factors or patterns which may be useful in making improvement in services.

Due to the influx of customer questions which is expected to have stopped after the promotional campaign. The company is trying to know why the questions keeps coming.

Based on the questions, the company used key subjects as metric in other to Analyse and address key issues resulted to the vendor which are shipping error , discount and delivery timeline.

Therefore, metrics allow to better measure and understand specific underlying patterns associated with businesses.

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4. Identify which type of algorithmic operation each one of the following steps belongs to: a. Get a value for x from the user. b. Test to determine if x is positive. If not, tell the user that he or she has made a mistake. c. Take the cube root of x. d. Do Steps 1.1, 1.2, and 1.3 x times

Answers

Answer:

a. input/output

b. if/else statement

c. while loop

Explanation:

I don't know, sort of...



does industry-recognized certifications (microsoft office suite) boost your resume and
increase your earning potential?

Answers

Answer:Having Microsoft Office training can make you more productive, confident, and satisfied with your job. ... Productivity is crucial to success in the administrative assisting field, and your employers will thank you for it. 3. Industry-recognized certification will boost your resume and increase your earning potential.

Explanation: i no it