Disclosed herein are soft tissue fillers, for example, dermal and subdermal fillers, based on hyaluronic acids and pharmaceutically acceptable salts thereof. The heat dissipation structure is used for a backlight module which comprises a circuit board having a through hole with a light emitting diode corresponding thereto and disposed on one side of the circuit board. This tapered portion helps to channel flux to the pole tip portion of the shield, while preventing the loss of write field to the shield. The computer system can also include a downtime execution module configured to trigger the shadow system to change from a downstate to an upstate based on a combination of data included in the shadow basis database and the data of the shadow program database. Moreover, the embodiment may support a plurality of features during a treatment interval.