Abstract: A handheld mobile apparatus with four-direction photography comprises a handheld mobile device and a four-direction photography part. The handheld mobile device comprises a front surface with a screen, a rear surface, an upper surface, a lower surface, a left surface and a right surface. The four-direction photography part comprises four photography devices that are respectively disposed on the upper surface, the lower surface, the left surface and the right surface. Accordingly, the four photography devices can capture image along four photography directions. At least one image captured is instantly displayed on the screen. Therefore, it can improve security of users to advance while using the handheld mobile apparatus. It is quite convenient for users to be capable of holding in both of an upright or a transversal holding position. And, it is quite humanized for users to arbitrarily choose a quantity of images to be displayed, and so on.

Abstract: An air sterilization device with low aerosol bounce includes an air conditioning pipe, a porous filter media, and a UV light generator. This porous filter media, it is secured on the fixing portion. This porous filter media has many irregularly distributed channels. The channel is coated with a coating layer having a thickness between 10 ?m to 1000 ?m sticking aerosols for avoiding bounce effect. The UV light generator can emit UV light to kill biological aerosols. It is suitable for long-term usage. So, the bounce effect of aerosols can be significantly reduced. The maintenance cost is low. The sterilization effect is excellent. Plus, the flow rate of the air conditioning system remains high.

Abstract: An apparatus for converting ultraviolet (UV) light into electricity is disclosed. It includes a UV-light-into-electricity conversion device and an electricity storage. The welding operation zone has a welding apparatus for welding a workpiece. This welding apparatus generates strong UV light during a welding operation. The UV-light-into-electricity conversion device can absorb the UV light and then convert into electricity. Finally, the electricity storage stores the electricity generated by the UV-light-into-electricity conversion device. Hence, it can convert the harmful UV light into useable electricity. The entire structure of this invention is simple. In addition, it is suitable for a fixed operation zone or a movable operation zone during a welding operation.

Abstract: A uniform aerosol deposit sampling device includes a first housing and a second housing. The first housing has an air inlet and a first chamber. The second housing has an air outlet, an second chamber, a filter holder and a flow guiding portion. The filter holder is provided for securing an air-penetratable supporting pad and a filter media. The flow guiding portion is a substantially conical and gradually narrowing. The flow guiding portion has a semi-conical angle ranged from 15 to 85 degrees. So, the flow guiding portion makes the entire air flow smooth and evenly distributed. The aerosols will be evenly distributed and uniformly deposited on the filter media. And, it is easy to evaluate the amount and composition of the aerosols.

Abstract: An air sterilization device with low aerosol bounce includes an air conditioning pipe, a porous filter media, and a UV light generator. This porous filter media, it is secured on the fixing portion. This porous filter media has many irregularly distributed channels. The channel is coated with a coating layer having a thickness between 10 ?m to 1000 ?m sticking aerosols for avoiding bounce effect. The UV light generator can emit UV light to kill biological aerosols. It is suitable for long-term usage. So, the bounce effect of aerosols can be significantly reduced. The maintenance cost is low. The sterilization effect is excellent. Plus, the flow rate of the air conditioning system remains high.

Abstract: A multi-stage horizontal elutriator includes a flow inlet, a flow outlet, a hollow container that is disposed between said flow inlet and said flow outlet. This hollow container has a guide-in portion, a first parallel plates set, a second parallel plates set, and a guide-out portion. The first plates set is different to the second plates set. So, the aerosol's falling distance can be shortened significantly. The relative culturable ratio and the survival efficiency for bioaerosols are both high. The structure is simple with low cost.

Abstract: An aerosol size-selective impactor for reducing particle bounce includes a main structure, a buffering layer, and a dehydration preventing layer. This main structure with an inlet and an outlet has a central channel and a receiving cavity. There are many nozzles in the inlet. The buffering layer is filled in the receiving cavity. The dehydration preventing layer is coated on the buffering layer for reducing the dehydration of water contained in the buffering layer. So, this invention utilizes the design of the receiving cavity to receive both layers. Its accuracy is high. Its sampling time lasts longer. It can endure vibrations. This invention can yield the particle bounce effect with lower cost. And, its application scope is wide.

Abstract: A uniform aerosol deposit sampling device includes a first housing and a second housing. The first housing has an air inlet and a first chamber. The second housing has an air outlet, an second chamber, a filter holder and a flow guiding portion. The filter holder is provided for securing an air-penetratable supporting pad and a filter media. The flow guiding portion is a substantially conical and gradually narrowing. The flow guiding portion has a semi-conical angle ranged from 15 to 85 degrees. So, the flow guiding portion makes the entire air flow smooth and evenly distributed. The aerosols will be evenly distributed and uniformly deposited on the filter media. And, it is easy to evaluate the amount and composition of the aerosols.

Abstract: An aerosol size-selective impactor for reducing particle bounce includes a main structure, a buffering layer, and a dehydration preventing layer. This main structure with an inlet and an outlet has a central channel and a receiving cavity. There are many nozzles in the inlet. The buffering layer is filled in the receiving cavity. The dehydration preventing layer is coated on the buffering layer for reducing the dehydration of water contained in the buffering layer. So, this invention utilizes the design of the receiving cavity to receive both layers. Its accuracy is high. Its sampling time lasts longer. It can endure vibrations. This invention can yield the particle bounce effect with lower cost. And, its application scope is wide.

Abstract: An aerosol size-selective sampling device is composed of pre-filter, a base housing, and a collector. The device is intended to take an aerosol sample from a given atmospheric air. The pre-filter is composed of two or more porous filtration materials arranged in one end of the base housing in a parallel manner for allowing the atmospheric air to pass therethrough in a parallel and diverting pattern before the atmospheric air is allowed to pass in a converging manner through the collector which is located in another end of the base housing. The pre-filter is able to attain a desired penetration rate profile as a function of an aerodynamic diameter of aerosol contained in the atmospheric air within a predetermined range of aerodynamic diameter.