Overcoming the challenges of lower layer protocol reconfiguration for software radio based mobile terminals

Author(s):  
P. Bucknell
2018 ◽  
Vol 35 (3-4) ◽  
pp. 243-252 ◽  
Author(s):  
Chengfeng JIAN ◽  
Tao LU ◽  
Xiaoyu XIANG ◽  
Meiyu ZHANG

1976 ◽  
Vol 7 (5) ◽  
pp. 307-320 ◽  
Author(s):  
G. S. Bremmeng ◽  
A. E. Kloster

Transjøen, a lake in S.E. Norway investigated hydrographically from October 1969 to October 1971, consists of two basins, both of which are meromictic (lake with lower layer which does not participate in the periodic circulations). The lake has a large influx of groundwater of very varying chemical composition. The calcium content is high and precipitated calcium carbonate and electrolyte rich groundwater is assumed to be the main reason for the meromictic stability. The redox potentials of monimolimnion (the lower layer which does not participtate in the periodic circulation) are extremely low, but in spite of this fact the content of sulphate is high.


1994 ◽  
Vol 30 (10) ◽  
pp. 161-171 ◽  
Author(s):  
A. J. Theodorou

Nutrient pollution in Elefsis Bay arises mainly from the disposal of Athens untreated wastewater at the eastern entrance of the Bay. The absence of river discharge, lack of cultivated agricultural areas providing runoff and the Bay's limited circulation provide the conditions for the Bay's eutrophication by the discharge of untreated wastewater. In the spring of 1993 this discharge was replaced by a new deep outfall system. To monitor any future changes an assessment of the present ecological state of the Bay is required. Analysis of appropriate data showed that Elefsis Bay accumulates nutrients. In summer a strong thermal stratification causes anoxic conditions to occur in the lower layer. The ecosystem exhibits reduced species diversity and strong oscillations of plankton annual cycles. Flagellates (Cryptomonas sp.) dominate the phytoplankton, followed by dinoflagellates (Gyrodinium aureolum, Prorocentum dentatum) and only in the spring diatoms (Nitzschia) predominate. The zooplankton was dominated by copepods (Acartia clausi) and cladoceran (Podon polyphemoides). Macrobenthos consists of a small number of pollution-resistant species of Polychaeta (Capitela capitata), whilst in summer only one species of Molluscs (Corbula gibba) survives.


Author(s):  
Priya Yadav ◽  
Pranjeet Das ◽  
Ravi Kumar Malhotra

E-commerce is process of doing business through computer networks. Advances in wireless network technology and the continuously increasing number of users of mobile latter on make an ideal platform for offering various high utilityservices in just a snap of a finger to the mobile users and give pace to the rapid development of E-Commerce in India.E-commerce is considered an excellent alternative for companies to reach new customersbut the fact that has hindered the growth of e-commerce is security. Security is the challenge facing e-commerce today and there is still a lot of advancement made in the field of securityfor increasing the use of e-commerce in developing countries the B2B e-commerce is implemented for improving access to global markets for firms in developing countries. With the special characteristics and constraints of mobile terminals and wireless networks and the context, situations and circumstances that people use their hand-held terminalswhich will ultimately fuel explosive ecommerce growth in India This paper highlights the various key challenges and opportunities which Indian e-commerce industry may face in the upcoming years. And also discuss challenges in electronic commerce transactions.


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