Abstract: The present disclosure relates to a microfluidic device capable of mimicking a biological microenvironment thereby achieving control of a microenvironment with time through control of the diffusion of target elements between chambers by interrupting or generating fluid flow inside a channel, and a method for manufacturing the same, and the microfluidic device according to an aspect of the present disclosure can mimic the biological microenvironment which changes constantly with time via a simple temporary operation of generating or interrupting fluid flow in the channel mechanically and can control diffusion via a simple method, and accordingly, a complicated microenvironment can be reproduced since the number and arrangement of diffusion chambers and channels can be designed variously.

Abstract: The present disclosure relates to a microfluidic device capable of mimicking a biological microenvironment thereby achieving control of a microenvironment with time through control of the diffusion of target elements between chambers by interrupting or generating fluid flow inside a channel, and a method for manufacturing the same, and the microfluidic device according to an aspect of the present disclosure can mimic the biological microenvironment which changes constantly with time via a simple temporary operation of generating or interrupting fluid flow in the channel mechanically and can control diffusion via a simple method, and accordingly, a complicated microenvironment can be reproduced since the number and arrangement of diffusion chambers and channels can be designed variously.

Abstract: A device for generating limit torque with a function of yielding a torque change in real time includes a spring, a rotating portion having a cam surface formed therein, a transmitting portion transmitting an elastic force of the spring to the cam surface, a fixed portion with respect to which the relative rotation of the rotating portion is generated, and a limit-torque control portion provided to the fixed portion so as to control limit torque of the rotating portion by adjusting the elastic force of the spring. In the device, the limit-torque control portion controls the limit torque of the spring by changing the elastic force of the spring in real time.

Abstract: A device for generating limit torque with a function of yielding a torque change in real time includes a spring, a rotating portion having a cam surface formed therein, a transmitting portion transmitting an elastic force of the spring to the cam surface, a fixed portion with respect to which the relative rotation of the rotating portion is generated, and a limit-torque control portion provided to the fixed portion so as to control limit torque of the rotating portion by adjusting the elastic force of the spring. In the device, the limit-torque control portion controls the limit torque of the spring by changing the elastic force of the spring in real time.