The thermal copolymerization of lysine with other alpha-amino acids has been studied further. The identity of the second amino acid influences various properties of the polymer obtained, including the proportion of alpha and epsilon linkages of lysine. A review of linkages in proteinoids indicated alpha and beta linkages for aspartic acid, alpha and gamma linkages for glutamic acid, alpha and e...

In this paper, we consider a special kind of overconstrained 6R closed linkages which we call angle-symmetric 6R linkages. These are linkages with the property that the rotation angles are equal for each of the three pairs of opposite joints. We give a classification of these linkages. It turns that there are three types. First, we have the linkages with line symmetry. The second type is new. T...

Introduction Hanoi is currently undergoing a process of intensive industrialization and modernization. The population in the smaller Hanoi urban zone has risen dramatically from 300,000 in 1954 to its current population of more than 1.7 million which is 60% of the total population in the area of greater Hanoi. It is predicted that this will rise to 2.5 million amongst 4.5 million of total popul...

Data from the urban renewal experience in Syracuse, New York are used to examine the impact of race on patterns of intra-urban migration. The results show that, overall, the migration patterns exhibited an exponential decay in frequency with increasing distance. Both blacks and whites display this pattern, but blacks tend to cluster more closely around the point of origin. Indirect evidence is ...

Consistent with ideas of urban shrinkage, many town centres have experienced years increasing vacancy due to the loss brand name retailers, and a crisis has emerged as conditions deteriorated. This paper makes conceptual practical linkages related “smart-decline”/“rightsizing” literature provide insights regarding challenges centre shrinkage strategies governance structures required realise opp...

This paper analyses the concept of linkages and studies the development and the determinants of inter-firm linkages between electronics firms in Ireland and domestic sub-suppliers using firm level data for 1982 to 1995. We discuss the concept of inter-firm linkages and the effects of linkages. We argue that the concept of linkages developed by Hirschman (1958) is an inter-sectoral concept which...

I n this study, the Regional Input- Output Structural Decomposition Analysis (I-O SDA) is used to investigate the effects of technological changes on employment in Sistan and Baluchestan Province of Iran during 2006-2011. This paper develops the SDA method to decompose the technological change from two viewpoints of supply and demand for intermediate inputs in each sector. These chan...