Abstract: In some embodiments, a light emitting structure comprises a layered semiconductor stack comprising a first set of doped layers, a second layer, a light emitting layer positioned between the first set of doped layers and the second layer, and an electrical contact to the first set of doped layers. The first set of doped layers can comprise a first sub-layer, a second sub-layer, and a third sub-layer, wherein the third sub-layer is adjacent to the light emitting layer. The electrical contact can be coupled to the second sub-layer. The first, second and third sub-layers can be doped n-type, and an electrical conductivity of the second sub-layer can be higher than an electrical conductivity of the first and third sub-layers. The first, second and third sub-layers, the light emitting layer, and the second layer can each comprise a superlattice.

Abstract: Methods and systems are presented for signed document image analysis and fraud detection. An image of a document may be received from a user's device. A first layer of a machine learning engine is used to identify a signature and a name of the user within different areas of the received image. A second layer of the machine learning engine is used to extract a plurality of features from the different areas of the image. The plurality of features includes at least one visual feature representing the signature and at least one textual feature representing the name. A combined feature representation of the signature and the name is generated based on the plurality of features extracted from the image. A third layer of the machine learning engine is used to determine whether the signature of the user has been digitally altered, based on the combined feature representation.

Abstract: A discontinuous transmission (DTX) information transmission method is provided. The DTX information transmission method may include the following steps. A processor of an apparatus may determine whether to enter a DTX mode. A transceiver of the apparatus may transmit DTX information to a network node in response to determining to enter the DTX mode.

Abstract: A method includes transmitting an instruction to a motive power supply of an elastically deformable device to drive the elastically deformable device in accordance with a drive setting; measuring a force exerted on the elastically deformable device with a sensor; outputting an observed value representative of the force; comparing the observed value with a reference value corresponding with a predetermined force to be exerted on the elastically deformable device; and adjusting the drive setting based on a determination that the observed value is outside of a predetermined range of the reference value. The method prevents slack in the elastically deformable device over time. Related apparatuses, systems, techniques and articles are also described.

Abstract: Introduced here is an approach to further refining an initial set of target locations that can serve as inputs to machine learning mechanisms. These target locations may refer to unique molecular positions in a reference human genome and/or mutations thereof that are diagnostically relevant for a given cancer type. The system can implement a refinement mechanism to account for unnecessary or problematic data, such as consecutive/overlapping patterns, non-uniform read counts, insufficient data quality, internal processing noises, and/or insufficient data counts.

Abstract: Methods of retrofit analysis and verification for a building are presented including: analyzing a pre-retrofitted building; performing a retrofit on the pre-retrofitted building; and verifying the post-retrofitted building. In some embodiments, the analyzing the pre-retrofitted building includes: receiving a long view red-green-blue (RGB) stream of the pre-retrofitted building and storing to an RGB image repository; creating an RGB panorama of the pre-retrofitted building; receiving a close view RGB stream of the pre-retrofitted building and storing to the RGB image repository; receiving a close view pre-retrofit infrared (IR) thermography stream of the pre-retrofitted building and storing to a pre-retrofit IR image repository; and identifying pre-retrofit anomalies of the pre-retrofitted building.

Abstract: A method includes transmitting an instruction to a motive power supply of an elastically deformable device to drive the elastically deformable device in accordance with a drive setting; measuring a force exerted on the elastically deformable device with a sensor; outputting an observed value representative of the force; comparing the observed value with a reference value corresponding with a predetermined force to be exerted on the elastically deformable device; and adjusting the drive setting based on a determination that the observed value is outside of a predetermined range of the reference value. The method prevents slack in the elastically deformable device over time. Related apparatuses, systems, techniques and articles are also described.

Abstract: A web-based payment testing and virtualization environment provides a web portal with auto-generated profile detail in response to login credentials. In addition, in the test environment for a particular client account, the environment further applies intelligence to provide a dedicated processor testing without user interventions or configurations. Existing approaches require pre-configurations of the processor conditions or environments before executing the testing.

Abstract: The ability to upconvert two low energy photons into one high energy photon has potential applications in solar cells, photodetectors and data storage. In this disclosure, CdSe and PbSe semiconductor nanocrystals are combined with molecular emitters (diphenylanthracene and rubrene) to upconvert photons in both the visible and near infrared spectral regions. Absorption of low energy photons by the nanocrystals is followed by energy transfer to the molecular triplet states, which then undergo triplet-triplet annihilation to create high energy singlet states that emit upconverted light. By using conjugated organic ligands on the nanocrystals to form an energy cascade, the upconversion process can be enhanced by up to three orders of magnitude. The use of different combinations of nanocrystals and emitters shows that this platform has great flexibility in the choice of both excitation and emission wavelengths.

Abstract: Provided herein are transmitter ligands that improve photon upconversion of near infrared light (NIR) to visible light. The presently provided ligands are complexed to semiconductor nanocrystals and improve triplet energy transfer from semiconductor nanocrystal to annihilator in triplet-triplet annihilation. Suitable applications include bio-imaging.

Abstract: A physically-unclonable-function (PUF) circuit and the control method thereof are provided, and the control method can be applied to the magnetoresistive device. The control method includes providing a first energy to a plurality of magnetic-tunnel junction (MTJ) devices after initializing the MTJ devices to a resistance state, and determining whether the hamming weight of at least one of the MTJ devices which has a predetermined resistance state is within a predetermined range or not.

Abstract: Provided herein are transmitter ligands that improve photon upconversion of near infrared light (NIR) to visible light. The presently provided ligands are complexed to semiconductor nanocrystals and improve triplet energy transfer from semiconductor nanocrystal to annihilator in triplet-triplet annihilation. Suitable applications include bio-imaging.

Abstract: Systems and methods for applying Electric Network Frequency (ENF) forensic techniques to determine characteristics associated with an audio and/or video recording such as when and where the recording was made. In one embodiment, a system that determines at least one of a time and a location associated with a recording includes an ENF forensic database, an ENF extraction processing module and a comparison processing module. The ENF forensic database stores powerline data collected from at least one electrical power grid. The ENF extraction processing module extracts ENF content coupled into the recording. The comparison processing module compares the extracted ENF content with powerline data retrieved from the ENF forensic database and outputs information including one or more of a time during which the recording was made and a location where the recording was made based on the comparison with the powerline data.

Abstract: A physically-unclonable-function (PUF) circuit and the control method thereof are provided, and the control method can be applied to the magnetoresistive device. The control method includes providing a first energy to a plurality of magnetic-tunnel junction (MTJ) devices after initializing the MTJ devices to a resistance state, and determining whether the hamming weight of at least one of the MTJ devices which has a predetermined resistance state is within a predetermined range or not.

Abstract: Methods and systems for transmitting and receiving data using audio devices but without being detectable by a human ear are disclosed. For example, a device for transmitting data can include a modulator configured to transform digital data into a modulated signal having a frequency no less than about 20 kHz, and an audio transmitter coupled to an output of the modulator configured to transmit the modulated signal into a sound propagating medium without being detected by a human ear. The methods and systems can be used to perform two-factor authentication for permitting a user to access a remote server or other device.

Abstract: Systems and methods for applying Electric Network Frequency (ENF) forensic techniques to determine characteristics associated with an audio and/or video recording such as when and where the recording was made. In one embodiment, a system that determines at least one of a time and a location associated with a recording includes an ENF forensic database, an ENF extraction processing module and a comparison processing module. The ENF forensic database stores powerline data collected from at least one electrical power grid. The ENF extraction processing module extracts ENF content coupled into the recording. The comparison processing module compares the extracted ENF content with powerline data retrieved from the ENF forensic database and outputs information including one or more of a time during which the recording was made and a location where the recording was made based on the comparison with the powerline data.

Abstract: Methods and systems for transmitting and receiving data using audio devices but without being detectable by a human ear are disclosed. For example, a device for transmitting data can include a modulator configured to transform digital data into a modulated signal having a frequency no less than about 20 kHz, and an audio transmitter coupled to an output of the modulator configured to transmit the modulated signal into a sound propagating medium without being detected by a human ear. The methods and systems can be used to perform two-factor authentication for permitting a user to access a remote server or other device.

Abstract: A keyboard type input device used in conjunction with a wristwatch or a portable telephone has multiple key positions provided as character entry keys. Each key corresponds to one key in the selected row of the conventional QWERTY keyboard. A second set of control buttons provide for the selection of which row of a conventional QWERTY keyboard are represented by the character keys in addition to other functions such as case shift, and alpha-numerical control functions. A selected row is shown on a display, as visual feedback. Alternatively the keys are implemented as LCDs with pressure sensors and the characters of the selected row are displayed directly on the corresponding key positions. The keyboard finds particular use in portable devices as it demands less space than traditional keyboards.

Abstract: A phase change memory device and a method of forming the same are provided. The phase change memory device includes a conducting electrode in a dielectric layer, a bottom electrode over the conducting electrode, a phase change layer over the bottom electrode, and a top electrode over the phase change layer. The phase change memory device may further include a heat sink layer between the phase change layer and the top electrode. The resistivities of the bottom electrode and the top electrode are preferably greater than the resistivity of the phase change material in the crystalline state.

Abstract: A semiconductor structure includes a substrate; an isolation structure in the substrate, wherein the isolation structure defines a region therein; a first semiconductor region having at least a portion in the region defined by the isolation structure, wherein the first semiconductor region is of a first conductivity type; a second semiconductor region on the first semiconductor region, wherein the second semiconductor region is of a second conductivity type opposite the first conductivity type; and a third semiconductor region of the first conductivity type on the second semiconductor region, wherein the third semiconductor region has at least a portion higher than a top surface of the isolation structure.