Abstract: An electric oven with a heating element designed to conduct broiling operations includes a reflector that is mounted between the heating element and a ceiling of a cooking cavity. The reflector can include reflecting portions that extend downward from side, rear or front edges of the reflector to help focus radiant energy produced by a heating element downward onto an underlying cooking surface. The reflector can also include a plurality of curved segments that are designed to reflect radiant energy emitted upward by the heating element back downward onto an underlying cooking surface. The curved segments can have varying focal lengths to help more evenly distribute the reflected radiant energy across the underlying cooking surface.

Abstract: A gas burner unit for a cooktop includes a spreader positioned above a top surface of the cooktop to define a gap therebetween and having a plurality of gas outlets. The gas burner unit further includes a venturi in fluid communication with the gas outlets and an orifice holder having a plurality of protrusions defining a plurality of upwardly directed primary air inlets therethrough. The plurality of upwardly directed primary air inlets are in fluid communication with the gap on respective first ends thereof and with the venturi on respective second ends thereof opposite the first ends.

Abstract: A short tandem repeat (STR) typing method and system are developed for forensic identification of individual cells. Agarose-in-oil droplets are produced with a high frequency using a microfluidic droplet generator. Statistically dilute single cells, along with primer-functionalized microbeads, are randomly compartmentalized in the droplets. Massively parallel single-cell droplet PCR is performed to transfer replicas of desired STR targets from the single-cell genomic DNA onto a coencapsulated microbead. These DNA-conjugated beads are subsequently harvested and reamplified under statistically dilute conditions for conventional capillary electrophoresis STR fragment size analysis. The methods and systems described herein are valuable for the STR analysis of samples containing mixtures of cells/DNA from multiple contributors and for low concentration samples.

Abstract: An electric oven with a heating element designed to conduct broiling operations includes a reflector that is mounted between the heating element and a ceiling of a cooking cavity. The reflector can include reflecting portions that extend downward from side, rear or front edges of the reflector to help focus radiant energy produced by a heating element downward onto an underlying cooking surface. The reflector can also include a plurality of curved segments that are designed to reflect radiant energy emitted upward by the heating element back downward onto an underlying cooking surface. The curved segments can have varying focal lengths to help more evenly distribute the reflected radiant energy across the underlying cooking surface.

Abstract: An automatic reversing-reposition rocker arm includes a rocker arm body, and the rocker arm body is a steel box beam. A rocker arm pivoting shaft is attached on a middle of the body. The rocker arm body has a ballast tank, a water inlet, and a water outlet. The ballast tank is located in a back end of the rocker arm body. The water inlet is located in an upper edge of the ballast tank. The water outlet is located in a lower edge of the ballast tank. A left side and a right side of a lengthwise forth end of the rocker arm pivoting shaft match each other, and a plurality of connecting devices are attached on the forth end of the rocker arm body. A plurality of gas-liquid buffers connects with the rocker arm body via the connecting devices.

Abstract: An automatic reversing-reposition rocker arm includes a rocker arm body, and the rocker arm body is a steel box beam. A rocker arm pivoting shaft is attached on a middle of the body. The rocker arm body has a ballast tank, a water inlet, and a water outlet. The ballast tank is located in a back end of the rocker arm body. The water inlet is located in an upper edge of the ballast tank. The water outlet is located in a lower edge of the ballast tank. A left side and a right side of a lengthwise forth end of the rocker arm pivoting shaft match each other, and a plurality of connecting devices are attached on the forth end of the rocker arm body. A plurality of gas-liquid buffers connects with the rocker arm body via the connecting devices.