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Samuel Aka 부산대학교 한국민족문화연구소 2017 Localities Vol.7 No.-
Since the late 90s, the Niger Delta of the Federal Republic of Nigeria has been faced with many ecological threats. These include cholera outbreak, Lassa fever, oil spillage, black soot and flooding, among others. However, this essay focuses on black soot, oil spillage and flooding in four communities in Rivers State, one of the six states in the Niger Delta. These communities are most affected among the state's total of over one hundred. Their names are Aluu, Rumuolumeni, and K-Dere.
Protection of a Multicast Connection Request in an Elastic Optical Network Using Shared Protection
BODJRE, Aka Hugues Felix,ADEPO, Joel,COULIBALY, Adama,BABRI, Michel International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.1
Elastic Optical Networks (EONs) allow to solve the high demand for bandwidth due to the increase in the number of internet users and the explosion of multicast applications. To support multicast applications, network operator computes a tree-shaped path, which is a set of optical channels. Generally, the demand for bandwidth on an optical channel is enormous so that, if there is a single fiber failure, it could cause a serious interruption in data transmission and a huge loss of data. To avoid serious interruption in data transmission, the tree-shaped path of a multicast connection may be protected. Several works have been proposed methods to do this. But these works may cause the duplication of some resources after recovery due to a link failure. Therefore, this duplication can lead to inefficient use of network resources. Our work consists to propose a method of protection that eliminates the link that causes duplication so that, the final backup path structure after link failure is a tree. Evaluations and analyses have shown that our method uses less backup resources than methods for protection of a multicast connection.
Natsuki Aka 아시아테플 2024 The Journal of Asia TEFL Vol.21 No.1
This study investigated the effects of reading while listening (RWL) and reading only (RO) modes on learners’ reading comprehension and perceptions. A total of 157 Japanese high school learners of English as a foreign language (EFL) participated in this study. All the participants read four reading passages: two passages with RWL mode and two passages with RO mode. The participants were also divided into three different proficiency groups based on their vocabulary levels test score. The findings showed that the high and medium proficiency groups scored higher, regardless of having audio support or not. By contrast, the low proficiency group scored higher with RWL mode than with RO mode. The results of a questionnaire related to learners’ perceptions supported the view that the low group benefitted more from RWL mode compared to the other two groups. These findings indicated that learners’ vocabulary levels and two reading modes affected their reading performance differently. Furthermore, the findings show that the simultaneous reading and listening mode is an effective method to develop reading skills and motivation toward reading, especially for low proficiency learners.