In this paper we present the initial design, implementation and result of a small-scale prototype of Visible Light Communication using simple LED and a photodiode. Data is transmitted through visible light by sending data in a binary format as on and off that varies in frequency faster than the human eye can follow. The data to be transmitted is encoded and sent. The data is decoded back at the...

We investigate the usage of back-channel information in the information navigation dialogue between an expert guide and a user. By back-channel feedback, we mean the user’s verbal short response, which expresses his state of the mind during the dialogue. Its prototypical lexical entries include “hai” in Japanese and “yes” or “right” in English, however, we do not count explicit affirmative resp...

the study examined the role of information communication technologies in extension delivery of agricultural transformation agenda (ata) of nigeria.  the objectives were to: examine the agricultural extension delivery of ata; identify icts relevant in agricultural extension and application of ata; examine roles of icts in extension of ata and identify constraints to the use of icts in extension ...

In this paper we propose an antenna geometry whose structure embodies dual stacked circular patches printed back to back on a single substrate in inverted microstrip configuration offering wideband performance suitable for mobile communication systems. The structure offers easy integration with active devices due to its inverted configuration as well as wide bandwidth without any enhancement in...

MATLAB, an interactive environment for numerical and symbolic computation, supports a number of interfaces to foreign programming languages including Java. However, there is no appropriate support for calling back MATLAB functions from within the Java Virtual Machine integrated with MATLAB. This paper presents such an interface which is based exclusively on documented and portable mechanisms su...

this research is a descriptive study which had been performed in order of settlement of communication between the nurses with the confinded patients in the internal cardiac wards in the hospital affiliated to ministry of health and medical educations of tehran. this research has been done in twelve internal cardiac. wards of the hospital affiliated to the ministry of health and medical educatio...