With the spread of smartphones, connections to the same access point have increased, but the method of evaluating the throughput characteristics of smartphones has not been established. Therefore, in this paper, we propose a method for evaluating the throughput characteristics of smartphones in an actual environment and evaluation index. Furthermore, as an example using the proposed method, we analyzed the throughput characteristics during single device and two devices competitive transmission and confirmed the effectiveness of the proposed method.
This paper proposes a method to extract and visualize a library update history in a project. The method identifies reused library versions by comparing source code in a product with existing versions of the library so that developers can understand when their own copy of a library has been copied, modified, and updated.
The open source community (OSC) is a place to develop collective knowledge available to anyone, thereby inevitably engendering free riders. Despite this, many firms have contributed to OSCs. This study examines 10 Android smartphone manufacturers between 2010 and 2013 with regard to their (a) source code contributions and the relation of those contributions to (b) time to market as measured by the release of their first Android smartphones. The results of the analysis are divided into the following two groups: (A) a group that released smartphones faster than their competitors through source code contributions and (B) a group that made few source code contributions and was slower to release smartphones than group (A). In addition, in a few years, some firms were observed to have move from group (B) to group (A).