Abstract: A p-GaN high-electron-mobility transistor (HEMT) includes a buffer layer stacked on a substrate, a channel layer stacked on the buffer layer, a supply layer stacked on the channel layer, a doped layer stacked on the supply layer, and a hydrogen barrier layer covering the supply layer and the doped layer. A source and a drain are electrically connected to the channel layer and the supply layer, respectively. A gate is located on the doped layer. The hydrogen barrier layer is doped with fluorine.

Abstract: A computing device includes: a storage circuit, for storing an arbitration interframe space (AIFS) time, at least one expected value of at least one backoff time, a preamble time, a short interframe space (SIFS) time and an acknowledgement (ACK) time; a first computing circuit, for computing a payload time according to a packet length and a packet rate; a second computing circuit, coupled to the storage circuit and the first computing circuit, for computing at least one packet transmission time according to the AIFS time, the at least one expected value of the at least one backoff time, the preamble time, the SIFS time, the ACK time and the payload time; and a third computing circuit, coupled to the second computing circuit, for computing a total packet transmission time according to the at least one packet transmission time and an estimated packet error rate.

Abstract: A transmission device for suppressing the glass-fiber effect includes a circuit board and a transmission line. The circuit board includes a plurality of glass fibers, so as to define a fiber pitch. The transmission line is disposed on the circuit board. The transmission line includes a plurality of non-parallel segments. Each of the non-parallel segments of the transmission line has an offset distance with respect to a reference line. The offset distance is longer than or equal to a half of the fiber pitch.

Abstract: During operation, an access point may provide a first WLAN and a second WLAN, where the first WLAN uses a WPA2-compatible authentication protocol and the second WLAN uses a WPA3-compatible authentication protocol. In response to an association request or a probe request associated with (or from) an electronic device, the access point may establish a connection with the electronic device using the first WLAN. Then, the access point may confirm, with a computer system, that a binding between a passphrase associated with the electronic device and the second WLAN exists. Alternatively, when the binding does not exist, the access point may establish the binding in the computer system. Next, the access point may perform a BSS transition of the electronic device from the first WLAN to the second WLAN.

Abstract: A fundus camera includes an objective lens, an illumination device, an imaging lens group and an image sensor. The illumination device has a light emitting position and includes a plurality of light emitting modules and a driving element. Each light emitting module generates a corresponding illumination light, and the optical characteristics of the illumination lights are different from each other. The driving element drives one of the light emitting modules to the light emitting position of the illumination device to output an illumination light with required optical characteristics and irradiate it to a fundus through the objective lens. The imaging light reflected by the fundus passes through the objective lens and the imaging lens group to form an image on the image sensor so as to generate a fundus image. The abovementioned fundus camera has a compact structure and can switch the illumination light sources in a short time to obtain fundus images with different optical characteristics.

Abstract: A fundus camera includes an eyeball-offset detection device and an annular illumination device. The eyeball-offset detection device is configured to detect an offset vector of a lens of the fundus camera relative to an inspected eyeball. The annular illumination device includes a plurality of illumination elements that are arranged in a ring shape around an optical axis of an imaging system of the fundus camera. According to the offset vector of the lens relative to the inspected eyeball, the fundus camera selectively activates one or more illumination elements at corresponding positions to keep an illumination optical path away from a center area of the pupil of the inspected eyeball to reduce effects of corneal reflection and improve illumination quality. Therefore, the abovementioned fundus camera has a large operable range.

Abstract: A fundus camera includes an eyeball-offset detection device and an annular illumination device. The eyeball-offset detection device is configured to detect an offset vector of a lens of the fundus camera relative to an inspected eyeball. The annular illumination device includes a plurality of illumination elements that are arranged in a ring shape around an optical axis of an imaging system of the fundus camera. According to the offset vector of the lens relative to the inspected eyeball, the fundus camera selectively activates one or more illumination elements at corresponding positions to keep an illumination optical path away from a center area of the pupil of the inspected eyeball to reduce effects of corneal reflection and improve illumination quality. Therefore, the abovementioned fundus camera has a large operable range.

Abstract: A plant develop device includes a tubular structure, a water supply device, and a soil package. The tubular structure forms a plurality of growth holes, and a plurality of water conservation grooves are formed at a bottom of an internal surface of the tubular structure. Growth medium is wrapped by the soil package therein, and a through hole corresponding to one of the growth hole is formed on a surface of the soil package. The plant develop wall of the present invention includes the plant develop device, a rack, and a positioning ring which is used to fix the tubular structure on the rack. Thereby, the present invention can provides sufficient room for plant growing, improved fixation, and water regulation.

Abstract: A plant develop rack includes a base, plural soil packages, a water supply device, and a water collecting tank. Plural rack units are disposed on the base and are arranged vertically. Each soil package encloses growth medium and plant and forms plural openings for the plant to extend outward. The water supply device is located above the rack units. Thereby, when the water supply provides water to the most upper rack unit, water may enter the soil package on that rack unit to nourish the plant. Thereafter, excess water may flow downward via draining holes of the rack unit to reach lower rack units. Thus, the soil packages on all rack units can acquire sufficient water for growing the plant.