Charging systems for wearable UV sensing devices. The charging systems include a wearable housing including a UV sensor, a central conductor, and at least one annular conductor extending around the central conductor. The system also includes a charger that has at least first and second conductive contacts, where the first and second contacts are spaced from each other and the central conductor and annular conductor are spaced from each other such that the first and second contacts are aligned with the central conductor and the annular conductor, respectively, when the housing and charger interface.

The present technology relates to an imaging apparatus and a manufacturing method which enables sensitivity of an imaging apparatus using infrared rays to be improved. The imaging apparatus includes: a light-receiving element array in which a plurality of light-receiving elements including a compound semiconductor having light-receiving sensitivity in an infrared range are arrayed; a signal processing circuit that processes a signal from the light-receiving element; an upper electrode formed on a light-receiving surface side of the light-receiving element; and a lower electrode that is paired with the upper electrode, in which the light-receiving element array and the signal processing circuit are joined to each other with a film of a predetermined material, the upper electrode and the signal processing circuit are connected to each other through a through-via-hole penetrating a part of the light-receiving element, and the lower electrode is made as an electrode common to the light-receiving elements arrayed in the light-receiving element array. The present technology can be applied to an infrared sensor.

Ultraviolet (UV) light emission devices and related methods of use. The UV light emission devices disclosed herein are particularly suited for use in disinfecting surfaces and air. The UV light emission devices disclosed herein can be provided in the form factor of a handheld device that is easily held and manipulated by a human user. The human user can manipulate the handheld UV light emission device to decontaminate surfaces, air, and other areas by orienting the handheld UV light emission device so that the UV light emitted from its light source is directed to the area of interest to be decontaminated.

Electrical faults pose a significant risk to people and property. A system is described that deploys instrument devices with sensors to detect faults within an alternating current (AC) electrical distribution system. These sensors may detect electrical, optical, thermal, acoustic, radio frequency, and other phenomena associated with a fault. Data from different sensors may also be used to distinguish fault and non-fault status. Users are notified if a fault status is detected. Mitigating actions may be automatically taken, such as de-energizing a branch circuit associated with the fault status. Information about non-fault status may also be used to mitigate nuisance circuit breaker interruptions. In some situations, a nuisance interruption of a breaker may be automatically reset if all instrument devices connected to the breaker reported non-fault status before the interruption.

An ultraviolet light generation target includes a light emitting layer. The light emitting layer contains a YPO.sub.4 crystal to which at least scandium (Sc) is added, and receives an electron beam to generate ultraviolet light. Further, a method of manufacturing the ultraviolet light generation target includes a first step of preparing a mixture containing yttrium (Y) oxide, Sc oxide, phosphoric acid, and a liquid, a second step of evaporating the liquid, and a third step of firing the mixture.

The instant disclosure is directed to wearable dermatological systems with battery-free sensors. A wearable system may comprise a wireless, battery-free sensor configured to detect one or more characteristic features of a wearer's skin and communicate information relating to the one or more characteristic features of the wearer's skin to a reader. The reader may be coupled to the wireless, battery-free sensor. The reader may also be configured to collect the information related to the detected one or more characteristic features of the wearer's skin. The wearable system may be configured to measure the hydration level of a user's skin. A kit may also comprise the wearable system and one or more products.

The instant disclosure is directed to wearable dermatological systems with battery-free sensors, and kits which include those wearable systems. A kit may include a wearable system comprising a wireless, battery-free radiation sensor configured to detect radiation at one or more radiation wavelengths, and a reader coupled to the radiation sensor and configured to collect information related to at least one characteristic feature of the detected radiation. The kit may also include a product comprising at least one active ingredient. The wearable system may be configured for use by users known to suffer from a number of dermatological conditions, and may further comprise a controller configured to report to a user, which may include suggesting that the user perform a function when the amount of detected radiation exceeds a predetermined limit.

The instant disclosure is directed to wearable systems with battery-free sensors. A wearable system may comprise a wireless, battery-free radiation sensor configured to detect radiation at one or more radiation wavelengths, and a reader configured to collect information related to at least one characteristic feature of the detected radiation. The wearable system may also include a transponder, transmitter, or transducer coupled to the radiation sensor and configured to reflect information relating to at least one characteristic feature of the detected radiation to a device. The wearable system may be implemented in an interior portion of a wearable article and configured to monitor an amount of radiation that is passed through the wearable article, or it may be implemented in an exterior portion of a wearable article and configured to monitor an amount of radiation to which the wearable article is exposed.

An electron tube includes a housing having an internal space airtightly sealed, and an electrode configured to generation or detection of energy by electron emission in the internal space. The housing has a main body part made of an insulating material and formed with a recess constituting the internal space, and a lid part fixed to the main body part so as to close an opening of the recess. The recess expands toward the opening side. The main body part is fixed with a penetrating member that is electrically connected to the electrode and passes through the main body part. The penetrating member has an internal space projecting part that projects from a bottom surface of the recess into the internal space.

Provided are an ink composition, comprising greater than 0.2% by weight a graphene quantum dot nanosurfactant, a printable material, and a solvent, wherein the printable material is dispersed in the solvent by the graphene quantum dot nanosurfactant, and a method of preparing an ink composition. Advantageously, the present ink composition may be printed onto 2D and 3D substrates to form printed films with improved mechanical stability and photoconductance.