Efficient energy use is primarily for any sensor networks to function for a longer time period. There have been many efficient schemes with various progress levels proposed by many researchers. Yet, there still more improvements are needed. This thesis is an attempt to make wireless sensor networks with further efficient on energy usage in the network with respect to rate of delivery of the messages. In sensor network architecture radio, sensing and actuators have influence over the power consumption in the entire network. While listening as well as transmitting, energy is consumed by the radio. However, if by reducing listening times or by reducing the number of messages transmitting would reduce the energy consumption. But, in real time scenario with critical information sensing network leads to information loss. To overcome this an adaptive routing technique should be considered. So, that it focuses on saving energy in a much more sophisticated way without reducing the performance of the sensing network transmitting and receiving functionalities. This thesis tackles on parts of the energy efficiency problem in a wireless sensor network and improving delivery rate of messages. To achieve this a routing technique is proposed. In this method, switching between two routing paths are considered and the switching decision taken by the server based on messages delivered comparative previous time intervals. The goal is to get maximum network life time without degrading the number of messages at the server. In this work some conventional routing methods are considered for implementing an approach. This approach is by implementing a shortest path, Gradient based energy routing algorithm and an observer component to control switching between paths. Further, controlled switching done by observer compared to normal initial switch rule. Evaluations are done in a simulation environment and results show improvement in network lifetime in a much more balanced way.

<p></p><p>This paper focuses on listening materials used in English language teaching in Sweden, especially in respect to the concept of global English. Global English could briefly be described as the linguistic, cultural, politic, and economic influence of English in the world. This influence concerns two aspects of English, namely the usage of English as a lingua franca in international communications, as well as the great range of English varieties that are used today. The purpose of this research is to study how varied listening materials are and how, when and why they are used in the classrooms. I conducted a two-part investigation to study these matters. The first part of the investigation focuses on teachers’ usage of listening materials and is based on a questionnaire handed out to five teachers. I found that the teachers varied much in their usage of listening materials. In the second part of the investigation I compare the listening materials provided by two Swedish textbooks on English, one from 1994 and one from 2003. Here I focus on the speakers’ varieties, rate of delivery, and instructions given for listening exercises. I found that both books featured a majority of speakers from the British Isles and America, and very few non-native speakers. The more recent book featured a larger degree of varieties outside the areas of Britain and the USA, as well as a larger degree of American English when dividing the varieties by the time these were spoken. RP (Received Pronunciation) and GA (General American) were also less dominating in the textbook from 2003. The rate of delivery was generally slower in the older textbook. The results from this investigation suggest that some changes seem to have occurred between the publishing of the two books. However, a focus on English as a lingua franca, where the aim is proficiency in efficient cross cultural communication rather than in the English spoken by native speakers,  does not seem to have influenced the textbooks studied here. It is difficult to appreciate whether or not changes like these have taken hold in Swedish classrooms, as teachers use many different listening materials and in many different ways.</p><p> </p>

This paper focuses on listening materials used in English language teaching in Sweden, especially in respect to the concept of global English. Global English could briefly be described as the linguistic, cultural, politic, and economic influence of English in the world. This influence concerns two aspects of English, namely the usage of English as a lingua franca in international communications, as well as the great range of English varieties that are used today. The purpose of this research is to study how varied listening materials are and how, when and why they are used in the classrooms. I conducted a two-part investigation to study these matters. The first part of the investigation focuses on teachers’ usage of listening materials and is based on a questionnaire handed out to five teachers. I found that the teachers varied much in their usage of listening materials. In the second part of the investigation I compare the listening materials provided by two Swedish textbooks on English, one from 1994 and one from 2003. Here I focus on the speakers’ varieties, rate of delivery, and instructions given for listening exercises. I found that both books featured a majority of speakers from the British Isles and America, and very few non-native speakers. The more recent book featured a larger degree of varieties outside the areas of Britain and the USA, as well as a larger degree of American English when dividing the varieties by the time these were spoken. RP (Received Pronunciation) and GA (General American) were also less dominating in the textbook from 2003. The rate of delivery was generally slower in the older textbook. The results from this investigation suggest that some changes seem to have occurred between the publishing of the two books. However, a focus on English as a lingua franca, where the aim is proficiency in efficient cross cultural communication rather than in the English spoken by native speakers,  does not seem to have influenced the textbooks studied here. It is difficult to appreciate whether or not changes like these have taken hold in Swedish classrooms, as teachers use many different listening materials and in many different ways.

Efficient energy use is primarily for any sensor networks to function for a longer time period. There have been many efficient schemes with various progress levels proposed by many researchers. Yet, there still more improvements are needed. This thesis is an attempt to make wireless sensor networks with further efficient on energy usage in the network with respect to rate of delivery of the messages. In sensor network architecture radio, sensing and actuators have influence over the power consumption in the entire network. While listening as well as transmitting, energy is consumed by the radio. However, if by reducing listening times or by reducing the number of messages transmitting would reduce the energy consumption. But, in real time scenario with critical information sensing network leads to information loss. To overcome this an adaptive routing technique should be considered. So, that it focuses on saving energy in a much more sophisticated way without reducing the performance of the sensing network transmitting and receiving functionalities. This thesis tackles on parts of the energy efficiency problem in a wireless sensor network and improving delivery rate of messages. To achieve this a routing technique is proposed. In this method, switching between two routing paths are considered and the switching decision taken by the server based on messages delivered comparative previous time intervals. The goal is to get maximum network life time without degrading the number of messages at the server. In this work some conventional routing methods are considered for implementing an approach. This approach is by implementing a shortest path, Gradient based energy routing algorithm and an observer component to control switching between paths. Further, controlled switching done by observer compared to normal initial switch rule. Evaluations are done in a simulation environment and results show improvement in network lifetime in a much more balanced way.