ADOPTION And Its Sociological Trends

This presentation covers some of the history of adoption in the US and the sociological trends tied to it.https://digitalcommons.tacoma.uw.edu/gender_studies/1070/thumbnail.jp

Experimental Studies of Interfacial Behavior of Contact System During Liquid Mediated Rough Surfaces Separation

In the applications related to liquid-solid interface, their operation could be affected by the properties of the interface especially the applications that have infinitesimal interaction force at the interface surface and high interaction velocity. This study provides real time dynamic force measurement in separation process along with the real time image acquisition to explain the deviation between theoretical and experimental methods. The experimental design, setup and initial conditions for experiment are described in detail for further study related to liquid separating force. The simulation model is created to apply the theoretical model in prediction of meniscus force for different initial conditions. The characteristics of solid liquid interface in static and dynamic state are showed in the study with visual demonstration, and how they can affect the experimental results is presented. The experiments showed that, in the static state, the evaporation will change the geometric parameters such as the contact angle, the vertical radius or the horizontal radius of liquid bridge, and the change of geometric parameters lead to the change of meniscus force. The analytical or models also showed that the change of maximum separation force caused by volume mass deviation and minimum distance deviation is more significant than that caused by contact angle deviation for the liquid with receding contact angle under 40 degree. The deviation of maximum separation force was not observed in the experiments with different roughness. In the experiments of different liquid with the same volume, the maximum separation force reduces with the reduction of surface tension if the receding contact angle is similar. The experiment can be conducted with the same liquid on different surface coating (non-wetting coating, nano-textured surfaces) to investigate the effect of hydrophobic contact to meniscus force

Location-aware computing: a neural network model for determining location in wireless LANs

The strengths of the RF signals arriving from more access points in a wireless LANs are related to the position of the mobile terminal and can be used to derive the location of the user. In a heterogeneous environment, e.g. inside a building or in a variegated urban geometry, the received power is a very complex function of the distance, the geometry, the materials. The complexity of the inverse problem (to derive the position from the signals) and the lack of complete information, motivate to consider flexible models based on a network of functions (neural networks). Specifying the value of the free parameters of the model requires a supervised learning strategy that starts from a set of labeled examples to construct a model that will then generalize in an appropriate manner when confronted with new data, not present in the training set. The advantage of the method is that it does not require ad-hoc infrastructure in addition to the wireless LAN, while the flexible modeling and learning capabilities of neural networks achieve lower errors in determining the position, are amenable to incremental improvements, and do not require the detailed knowledge of the access point locations and of the building characteristics. A user needs only a map of the working space and a small number of identified locations to train a system, as evidenced by the experimental results presented

公共政策のモバイル市場発展に対するインパクト分析 : ベトナム事例

制度:新 ; 文部省報告番号:甲2480号 ; 学位の種類:博士(国際情報通信学) ; 授与年月日:2007/6/20 ; 早大学位記番号:新458