Abstract: A semiconductor light-emitting element includes a light emission layer including a group III nitride semiconductor; an electron barrier layer disposed above the light emission layer and including a group III nitride semiconductor containing Al; and a p-type clad layer disposed above and in contact with the electron barrier layer, wherein the electron barrier layer and the p-type clad layer contain Mg as a dopant, and the p-type clad layer includes a high carbon concentration region containing carbon and a low carbon concentration region having a carbon concentration lower than a carbon concentration of the high carbon concentration region, in a stated order from an electron barrier layer side.

Abstract: According to one embodiment, an information presenting apparatus receives each observed value from sensors, and maintains a track of each target by updating the track based on an observed value having a correlation with the track. A likelihood ratio for a tentative track, which has not yet been determined to be a track of a target, is computed and compared with an upper limit threshold. When the likelihood ratio is greater than or equal to the upper limit threshold, the tentative track is determined to be a track of a target. When the likelihood ratio is greater than or equal to a monitor threshold which is lower than the upper limit threshold, the tentative track is determined to be a monitor track. The information of the track and the monitor track are presented.

Abstract: According to one embodiment, target tracking device includes track calculator and correction unit. Track calculator calculates a track of a target based on angular measurement of the target measured by a passive sensor. Correction unit sends correction data to the track calculator. Correction unit calculates correction data based on state vector of target input from an external device. Track calculator calculates track for each of a plurality of motion models based on angular measurement and correction data. Track calculator calculates the track of the target based on the track for each of the motion models. Track calculator calculates the track of the target by weighted sum of all tracks for the motion models.

Abstract: According to one embodiment, target tracking device includes passive processor, active processor, fusion unit and correction unit. Passive processor calculates passive track of target based on passive measurement of target angle measured by passive sensor. Active processor calculates active track of target based on active measurement of target distance and angle measured by active sensor. Fusion unit combines passive track and active track to output combined track. Correction unit calculates correction data based on combined track. Passive processor calculates track of the target for motion models based on passive measurement and correction data and calculates passive track by weighted sum of all tracks for motion models.

Abstract: According to one embodiment, a target tracking apparatus acquires a first determination result by determining which combination of N-dimensional tracks is for the real target, acquires a second determination result by determining which combination of N-dimensional angular observation values is for the real target, selects the first determination result when an observation environment is an environment other than a dense environment, selects the second determination result when the observation environment is a dense environment, and calculates distance information to thereby generate an (N+1)-dimensional track for each target.

Abstract: According to one embodiment, a target tracking apparatus calculates N-dimensional predicted values from a respective stored (N+1)-dimensional tracks for each of the targets, determines whether or not the N-dimensional predicted value for each of the targets is correlated with the received N-dimensional angle observed value for the target, if the N-dimensional predicted value is not correlated, generates a new (N+1)-dimensional track for the target based on the N-dimensional track corresponding to the N-dimensional angle observed value and if the N-dimensional predicted value is correlated, updates and stores the (N+1)-dimensional track using the N-dimensional angle observed value.

Abstract: According to one embodiment, an information presenting apparatus receives each observed value from sensors, and maintains a track of each target by updating the track based on an observed value having a correlation with the track. A likelihood ratio for a tentative track, which has not yet been determined to be a track of a target, is computed and compared with an upper limit threshold. When the likelihood ratio is greater than or equal to the upper limit threshold, the tentative track is determined to be a track of a target. When the likelihood ratio is greater than or equal to a monitor threshold which is lower than the upper limit threshold, the tentative track is determined to be a monitor track. The information of the track and the monitor track are presented.

Abstract: According to one embodiment, a target tracking apparatus acquires a first determination result by determining which combination of N-dimensional tracks is for the real target, acquires a second determination result by determining which combination of N-dimensional angular observation values is for the real target, selects the first determination result when an observation environment is an environment other than a dense environment, selects the second determination result when the observation environment is a dense environment, and calculates distance information to thereby generate an (N+1)-dimensional track for each target.

Abstract: According to one embodiment, a target tracking apparatus calculates N-dimensional predicted values from a respective stored (N+1)-dimensional tracks for each of the targets, determines whether or not the N-dimensional predicted value for each of the targets is correlated with the received N-dimensional angle observed value for the target, if the N-dimensional predicted value is not correlated, generates a new (N+1)-dimensional track for the target based on the N-dimensional track corresponding to the N-dimensional angle observed value and if the N-dimensional predicted value is correlated, updates and stores the (N+1)-dimensional track using the N-dimensional angle observed value.

Abstract: According to one embodiment, target tracking device includes passive processor, active processor, fusion unit and correction unit. Passive processor calculates passive track of target based on passive measurement of target angle measured by passive sensor. Active processor calculates active track of target based on active measurement of target distance and angle measured by active sensor. Fusion unit combines passive track and active track to output combined track. Correction unit calculates correction data based on combined track. Passive processor calculates track of the target for motion models based on passive measurement and correction data and calculates passive track by weighted sum of all tracks for motion models.

Abstract: According to one embodiment, target tracking device includes track calculator and correction unit. Track calculator calculates a track of a target based on angular measurement of the target measured by a passive sensor. Correction unit sends correction data to the track calculator. Correction unit calculates correction data based on state vector of target input from an external device. Track calculator calculates track for each of a plurality of motion models based on angular measurement and correction data. Track calculator calculates the track of the target based on the track for each of the motion models. Track calculator calculates the track of the target by weighted sum of all tracks for the motion models.

Abstract: Disclosed is a radar system which comprises an AD conversion unit for converting an analog signal obtained from an antenna into a digital signal, a frequency analysis unit for performing a frequency analysis of the digital signal converted by the AD conversion unit, a time-frequency analysis unit for performing a time-frequency analysis of the digital signal converted by the AD conversion unit, and a target detection unit for detecting a target based on a signal of which the frequency analysis is performed by the frequency analysis unit and a signal of which the time-frequency analysis is performed by the time-frequency analysis unit.

Abstract: The RF device of the present invention includes: a semiconductor substrate; and first and second semiconductor components provided on the substrate. Each of the components includes source electrodes, a gate electrode and a drain electrode. And multiple through holes, which pass through the substrate in the thickness direction, are opened in a region of the substrate between the two components. To enhance the effect of suppressing electrical interference between the components, a gap between two adjacent ones of the through holes is preferably smaller than the thickness of the substrate.

Abstract: A semiconductor laser device includes: a first light emitting device, the first light emitting device including a first first-conductive-type cladding layer, a first active layer having a first window region in the vicinity of a light emitting edge surface and a first second-conductive-type cladding layer stacked in this order on a substrate; and a second light emitting device, the second light emitting device including a second first-conductive-type cladding layer, a second active layer having a second window region in the vicinity of a light emitting edge surface and a second second-conductive-type cladding layer stacked in this order on the substrate. In the semiconductor laser device, respective lattice constants of the first second-conductive-type and second second-conductive-type cladding layers are adjusted to compensate for a difference in diffusion rate of an impurity between the first window region in the first active layer and the second window region in the second active layer.

Abstract: Disclosed is a radar system which comprises an AD conversion unit for converting an analog signal obtained from an antenna into a digital signal, a frequency analysis unit for performing a frequency analysis of the digital signal converted by the AD conversion unit, a time-frequency analysis unit for performing a time-frequency analysis of the digital signal converted by the AD conversion unit, and a target detection unit for detecting a target based on a signal of which the frequency analysis is performed by the frequency analysis unit and a signal of which the time-frequency analysis is performed by the time-frequency analysis unit.

Abstract: A semiconductor laser device includes: a first light emitting device, the first light emitting device including a first first-conductive-type cladding layer, a first active layer having a first window region in the vicinity of a light emitting edge surface and a first second-conductive-type cladding layer stacked in this order on a substrate; and a second light emitting device, the second light emitting device including a second first-conductive-type cladding layer, a second active layer having a second window region in the vicinity of a light emitting edge surface and a second second-conductive-type cladding layer stacked in this order on the substrate. In the semiconductor laser device, respective lattice constants of the first second-conductive-type and second second-conductive-type cladding layers are adjusted to compensate for a difference in diffusion rate of an impurity between the first window region in the first active layer and the second window region in the second active layer.

Abstract: The semiconductor laser according to the present invention has a substrate used as a shared base, on which an infrared laser diode portion and a red laser diode portion are formed apart from each other. The top surfaces of the laminated layers of the individual laser diode portions have different height positions in the thickness direction of the substrate in relation to the reference point Bf. Neighboring members are formed on the outer edge of the laser, sandwiching therebetween where the laser diode portions are formed. The top surface positions of the neighboring members are all set to the same height which is higher than or equal to the top surface position of the higher laser diode portion of the two.

Abstract: The present invention provides a semiconductor laser that includes a substrate and at least two active layers, wherein two resonators that respectively include the active layers are mutually arranged in parallel, and wherein in the resonators, the region of the active layers into which a current is injected, have different lengths. Thus, in the two wavelength laser of the present invention, by overcoming the limitation of the lengths of the resonators that are determined by the cleavages, it is possible to independently design and manufacture effective resonator lengths of a plurality of lasers of different characteristics, such as red lasers and infrared lasers, employ resonator lengths that are suitable for the respective desired characteristics, and provide a semiconductor with improved laser characteristics.

Abstract: A regulating resistor network includes a plurality of resistors connected in parallel to each other. Each of these resistors is cuttable by being irradiated with light, and a resistance value of the regulating resistor network is adjustable by cutting at least one of the resistors off.

Abstract: A via hole having a bottom is formed in a substrate and then a conductor layer is formed at least over a sidewall of the via hole. Thereafter, the substrate is thinned by removing a portion of the substrate opposite to another portion of the substrate in which the via hole is formed such that the conductor layer is exposed.