Undergraduate / Why you decided to apply to the department/area of Sejong University to which you are applying? [7]

It seems okay, but I suggest you that include particular courses in Sejong Univ. I heard that they have great programs for undergraduates, such as job consulting with the professors. Also, "I can work in many places other than hotels or tour operators" seems kinda vague. With your specific career plan, I think you can make it more special.

Undergraduate / Physics, engineering and women. Describe your career goals and the level of their implementation [4]

Hi, Sara.
Even though your essay is short, I get what you are trying to say.
How about changing the first and second sentences like this :

For many years, I had to endure people saying "Technology , physics and engineering are impossible for women to major in and admire." Throughout my high school years, I was motivated rather than frustrated, and studied even harder, so that I could prove the stereotypes wrong.

I hope you can get the best result!

Undergraduate / Why you decided to apply to the department/area of Sejong University to which you are applying? [7]

I think the second paragraph should be more clarified, so that you can answer more specifically about 'why you have to go to Sejong Univ.' The whole globalization part does not suit the essay prompt. I would rather change it into the situation in Korea, adding personal opinions or visions on rapidly changing industry.