Modottel Co., Ltd.

Samsung Electronics Co., Ltd.

Lg Hausys, Ltd.

Jin-Woo Nam

Young-Hoon Min

Seong-Moon Jung

Woo-Gyu Lim

Heon-Sung Kang

Jun-Yup Kim

The present invention relates to an assembly wall having improved sound absorption/insulation performance and an assembly structure thereof. The assembly wall includes plate members separated from each other to face each other and each forming at least one layer; stud members alternately placed on different inner surfaces of the plate members and comprising a web formed with a plurality of first perforated holes having at least one diameter; an insulation member interposed in a space defined between the plate members and the stud members; and a sheet member adjoining an outer surface of the insulation member and being formed with a plurality of second perforated holes having at least one diameter. With this structure, the assembly wall has excellent sound absorption and insulation performance over various frequency bands including a low frequency band without increasing wall thickness.

Assembly wall body having improved sound absorbing and screening performance and a assembly structure comprising the same

An apparatus and method for dynamically changing a password are provided. In the method, a random number is generated, and an original password and an operator are checked. The original password is changed by performing an operation of the random number and the original password based on the operator. Accordingly, the password exposure can be prevented and the personal information and asset information can be protected without using additional devices.

Apparatus and method for dynamically changing a password

Mobile phone

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Seoul, South Korea

Jin-Woo Nam