Abstract: An antenna apparatus having a first coil including at least one turn on at least one first-coil substrate and a second coil including at least one turn on at least one second-coil substrate. The first and second coils are electrically connected to one another in parallel.

Abstract: A penalty fee is charged in an online community exchange system to users for failing to carry out exchange agreements; the penalty fee is set as a fraction of the price of the exchange agreements, or a fixed amount, or a combination of both. Two debt limits, a maximum limit and a transaction-based limit, are set and imposed on all users in the online community exchange system. The transaction-based debt limit is set individually for each user, based on any of the three accumulated transaction data: accumulated credit transaction, accumulated debit transaction, or accumulated credit & debit transaction, in each user's exchange account. A user needs to satisfy both the two debt limits in order to continue to buy goods and services in the exchange system.

Abstract: A portable water flosser or dental cleaning device, which directs water from a faucet onto teeth without using an electrically operated pump, is made of a hose, a water jet tip member, and a tightening means. The hose at its small end is coupled with the water jet tip member and at its large end is loosely fit onto the neck of the faucet, leaving the faucet's nozzle completely inside the hose. The hose is fastened around the faucet's neck by the tightening means, which can be a piece of rope or a clip, so the faucet water is directed to the water jet tip member. The device fits with all types of faucets.

Abstract: Method and system for providing homemade food via an online marketplace are disclosed. The food is made in residential homes by skilled home cookers, who share the kitchens and cooking skills with the local community by providing the homemade food via the online marketplace. For the consumers, the online marketplace provides an easy access to wide variety of foods at lower prices.

Abstract: A secure pocket inside an outer garment pocket is disclosed. The opening of the secure pocket is opposite to the opening of the outer garment pocket, therefore wallet and other important items placed in the secure pocket do not easily fall out of the pockets and are safer from pickpocketing. The secure pocket can easily be made with a single piece of fabric without using buttons or zippers.

Abstract: An antenna apparatus having a first coil including at least one turn on at least one first-coil substrate and a second coil including at least one turn on at least one second-coil substrate. The first and second coils are electrically connected to one another in parallel.

Abstract: Apparatus and method for up-conversion of radio signals are disclosed. For example, an apparatus for up-conversion of radio signals is disclosed. The apparatus includes a signal conversion unit operable to convert an input signal to a plurality of single bits of data, a narrow pulse generator unit coupled to the signal conversion unit, the narrow pulse generator unit operable to generate a narrowly defined pulse for a single bit of data of the plurality of single bits of data, and a digital-to-analog conversion unit coupled to the narrow pulse generator unit, the digital-to-analog conversion unit operable to up-convert a frequency of the single bit of data.

Abstract: Apparatus and method for up-conversion of radio signals are disclosed. For example, an apparatus for up-conversion of radio signals is disclosed. The apparatus includes a signal conversion unit operable to convert an input signal to a plurality of single bits of data, a narrow pulse generator unit coupled to the signal conversion unit, the narrow pulse generator unit operable to generate a narrowly defined pulse for a single bit of data of the plurality of single bits of data, and a digital-to-analog conversion unit coupled to the narrow pulse generator unit, the digital-to-analog conversion unit operable to up-convert a frequency of the single bit of data.

Abstract: A Multi-level digital-to-analog (D/A) converter is incorporated with a multi-level quantizer in a multi-bit sigma-delta analog-to-digital (A/D) converter. The multi-level D/A converter is realized by feeding back reference voltages of the multi-level quantizer through a switch. The summation of electrical energy from multiple D/A converter elements found in conventional D/A converters is avoided so that element mismatch and circuit complexity are reduced significantly in the multi-bit sigma-delta A/D converter.