مطالب

The questions of centralization and decentralization arise in every polity. The constitution or the practice or both have to settle how much of policy making is to be decided by the central government and by component bodies. By and large liberalism and decentralization tend to go together while authoritarianism tends to be associated with centralization. The constitutional model which is generally regarded as bringing about the largest amount or decentralization is federalism. This is said to sonstitute a half way house between confederacies (where component units dominate)and unitary states (where the center dominates) In its classical form at least , federalism stipulates that there have to be two independent levels of government (the centre and upper level component bodies (often named states) each of these levels has the right to decide on matters falling within its own sphere. There are difficulties in practice especially with respect to the constituent power and to the fields allocated to each level. Federalism must be based on a rigid constitution there has to be s supreme court protecting the independence of the two levels of government there has to be a second chamber defending the rights of the component bodies at the central level.yet there are variations in the extent to which the component bodies are protected and generally in the extent to which there is decentralization. On the one hand federal states are becoming more centralized on the other centralization cannot go beyond a given point without leading to gross inefficiency and perhaps to a break up of the regime as the communist experience showed. Partly for this reason there is a degree of convergence between federal and unitary states. Federalism is also associated with efforts to bring together independent states but this has occurred in a smell number of polities only. Attempts at achieving closer cooperation between states has led more commonly to confederacies, such as the Unites Nations. The European community or European :::union::: has innovated by forming a type of association labeled supranational which is intermediate between the confederal and the federal models. There is innovation in that developments take place gradually with new fields beings progressively covered new structures being set up and new member states joining. The problems of centralization and decentralization have exercised the minds of many in relation to many types of organization : both efficency and freedom appear to be at stake . federalism succeeded in a number of contexts but it is not the panacea which some suggest it is it is also so diverse that one has to refer to federalisms rather than to federalism . what is at stake is the need to find an equilibrium between the two extremes of over centralization and break up. Given the large number of situations in the contemporary world one should look for a variety of solutions and for a continuous evolution of the models which have hitherto been proposed.

This study was intended to compare collaborative and individual task planning effects on Iranian EFL learners’ writing performance. Therefore, a group of 90 upper intermediate EFL learners were placed in three groups of Collaborative Task planning, Individual Task planning, and Control. In the experimental groups, participants were asked to do task planning collaboratively and individually. The first writing assignment was the pretest and the eighth one was the posttest. A rating scale which includes five equally weighted criteria for rating; namely, Organization, Content, Grammar, Mechanics, and Style as well as the Total score was used. After making sure about the inter-rater consistency, data were analyzed using one-way ANOVAs to examine the effects of task planning on EFL writing performance. Results indicated that task planning produced better writing performances in the experimental groups, when considering Total scores. Furthermore, the treatment was effective in Organization and Style. Nevertheless, it had no significant effects on Content, Grammar, and Mechanics. Results are in line with previous research on collaborative writing and task planning. However, the study was different because it made a distinction between collaborative and individual task planning. This study has practical implications for classroom practices and language teachers, and theoretical implications for a better understanding of sociocultural theories of second language learning.

This research seeks the role and effect strength of accessibility and vitality on urban spaces. Urban space is a phenomenon organized by information manifested in various forms, functions and meaning. It is the context of forming and improving social life, representing culture and urbanization of a culture. According to desirable cities, it is deliberated that the cause of this magnificence is their lively and vibrant urban spaces. Regarding this point, weak social interaction of people and lack of optional and social activities in cities of Iran is clearly observed. This issue will remove urbanity attributes of Iranian urban spaces. The research studies two important factors in urban spaces, based on literature review: accessibility and vitality; using library and field study of Hamadan city to find the rate of their effect on urban spaces of Iran. Correlation analysis and questionnaire were used to codify analytic model. The main hypothesis of the research is the weakness of urban spaces in Iranian cities due to poor access and lack of vitality in these spaces, that is acquired by investigating aspects related to access and vitality. The results showed a positive correlation between urban spaces and these two factors, which control 44 percent of urban spaces efficiency as a common courtyard.