Asian Transactions on Science & Technology

Volume: 01, Issue: 03, June 2011
ISSN 2221-4283

Title: Nanocrystallization and Magnetic Behaviour of Fe73.5-xCrxCu1Nb3Si13.5B9 amorphous alloys
Paper ID: ATST-50109026
Pages: 1-6
Abstract: The present state of development and progress in various areas of materials science is closely related to the understanding of the properties of materials on their length scale. Understanding of the crystallization kinetics of magnetic amorphous/ nanocrystalline alloys has enormous scientific and technological interest since the improvement as well as deterioration of magnetic properties sensitively depends on the degree of crystallization. Crystallization kinetics is often determined from Differential Scanning Calorimetry (DSC), Differential Thermal Analysis (DTA) and thermomagnetic analysis (TMA). In FINEMET with the composition Fe73.5Cu1Nb3Si13.5B9, ferromagnetic Α-Fe (Si) nanograins are formed from amorphous precursor by controlled annealing, which are coupled via exchange interaction through residual ferromagnetic amorphous matrix and exhibit ultrasoft magnetic properties. In the advanced stage of crystallization, iron boride phase is formed. Substitution effects have been studied for conventional FINEMET composition. Cr has been substituted for Nb previously as grain growth inhibiting element. Cr has also been substituted for Fe in order to study dilution effect of magnetic moment. In this study, series of amorphous alloys Fe73.5-xCrxCu1Nb3Si13.5B9 for an extended range of 0<=x<=17.5 has been studied thoroughly in order to observe crystallization and magnetic behavior due to Cr substitution for Fe using thermomagnetic measurement and differential scanning calorimety.

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Title: Equilibrium correlation function of the solution of the Molecular Beam Epitaxy equation
Authors: Boubaker Smii
Paper ID: ATST-30117034
Pages: 7-17
Abstract: In this paper we study the Molecular Beam Epitaxy equation where is a space-time Lévy noise. A special types of graphs called rooted trees with two types of leaves will be introduced and a numerical value will be assigned to each rooted tree. A perturbative solution is given by a tree expansion. A graphical calculus of the truncated correlation function is obtained via a Linked cluster theorem as a sum over connected graphs only. The equilibrium of the correlation function will be discussed as well in this work.

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Authors: Benedictus Kombaitan
Paper ID: ATST-10132032
Pages: 18-28
Abstract: The capability of Indonesia’s budget to fulfill the need of infrastructure development are only one third from the need of annual infrastructure budget. Coping with such budget deficiencies, the role of private sector are substantively inevitable. Central government already anticipated it by submit the Presidential Decree No. 67/2005 to regulate the Infrastructure Development through Public Private Partnership and revised by New Presidential Decree No. 13/2010. This is the milestone of Infrastructure Development in Indonesia. Through this regulation ‘the mind set’ of government apparatus to prepare the infrastructure development are now shifting from ‘state welfare’ to ‘open market’. Negotiation Approach to interact among actors in ‘State welfare’ are shifting from forcing and adversarial negotiation to collaborative negotiation at an ‘open market’ era. Changing the role of government in negotiation from adversarial to collaborative are intriguingly very interesting to be explored. Conventional infrastructure procurement system which has an orientation in short term (by project) will be shifting to the long term partnership. From eleven project of public private partnership in Indonesia during the last five year (after 2005) mostly in status of delay. Only a few ‘on schedule’ project of PPP such as Integrated Container Port Gedebage Bandung and PPP Project Clean Water Cimahi in West Java. Some the causes of why the project delay are not because of the common condition only, but also caused by the specific condition. Some common condition influence the effectiveness of negotiation are culture and interpersonal valence, while the specific condition influence the effectiveness of negotiation are attention, endurance and sense of crisis.

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