According to one embodiment, a semiconductor light emitting device includes a stacked structure body, first and second electrodes. The data may be obtained from previously acquired data, based upon evaluation of changes in parameters such as time and location that may jeopardize validity. Similarity scores may be generated based on a topic value for each user for the source topic and a topic value for the same user for each topic in a set of topics, where each topic in the set of topics is associated with a topic value for each user. There is a logical link between a mobile station and a serving packet radio support node. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. The method comprises melt-bonding the tube to a header of the heat exchanger to form a bond and sealing the bond with a sealant material to form a seal.