A digital method to calculate the true areas of sunspot groups

The areas of sunspots are the most prominent feature of the development of sunspot groups. Since the size of sunspot areas depend on the strength of the magnetic field, accurate measurements of these areas are important. In this study, a method which allows to measure true areas of the sunspots is introduced. A Stonyhurst disk is created by using a computer program and is coincided with solar images. By doing this, an accurate heliographic coordinate system is formed. Then, the true area of the whole sunspot group is calculated in square degrees with the aid of the heliographic coordinates of each picture element forming the image of the sunspot group. This technique's use is not limited with sunspot areas only. The areas of the flare and filaments observed on the chromospheric disk can also be calculated with the same method. In addition to this, it is possible to calculate the area of any occurrence on the solar disk, whether it is related to an activity or not.Comment: 14 pages, including 10 figures and 2 tables, accepted for publication in Experimental Astronom

Application of the no-signaling principle to obtain quantum cloners for any allowed value of fidelity

Special relativity forbids superluminal influences. Using only the no-signaling principle and an assumption about the form of the Schmidt decomposition, we show that for "any" allowed fidelity there is a "unique" approximate qubit cloner which can be written explicitly. We introduce the prime cloners whose fidelities have multiplicative property and show that the fidelity of the prime cloners for the infinite copy limit is 1/2.Comment: 8 pages, no figure

First-forbidden β\mathbf{\beta}-decay rates, energy rates of β\beta-delayed neutrons and probability of β\beta-delayed neutron emissions for neutron-rich nickel isotopes

First-forbidden (FF) transitions can play an important role in decreasing the calculated half-lives specially in environments where allowed Gamow-Teller (GT) transitions are unfavored. Of special mention is the case of neutron-rich nuclei where, due to phase-space amplification, FF transitions are much favored. We calculate the allowed GT transitions in various pn-QRPA models for even-even neutron-rich isotopes of nickel. Here we also study the effect of deformation on the calculated GT strengths. The FF transitions for even-even neutron-rich isotopes of nickel are calculated assuming the nuclei to be spherical. Later we take into account deformation of nuclei and calculate GT + unique FF transitions, stellar $\beta$-decay rates, energy rate of $\beta$-delayed neutrons and probability of $\beta$-delayed neutron emissions. The calculated half-lives are in excellent agreement with measured ones and might contribute in speeding-up of the $r$-matter flow.Comment: 22 pages, 10 figures, 7 tables. arXiv admin note: text overlap with arXiv:1301.5225 by other author

The Impacts of the Turkish Emigrants on Turkish Exports and Imports in Europe

This paper examines the link between migration and trade, focusing on Turkey as a “sending” country and the selected trading partners, Austria, Belgium, Denmark, Finland, France, Germany, Holland, Italy, Norway, Spain, Sweden, Switzerland and the UK, as the “receiving” countries in Europe. The research question is: “Do Turkish emigrants have positive impacts on the exports and imports of Turkey through preference and/or network channels.” The investigation methodology involves the fixed effect panel data analysis, and the estimation technique is the Least Squares under the assumption of the presence of cross section heteroskedasticity and the robust standard errors. This paper includes the 1980-2007 period, as well as two sub-periods, 1980-1995 and 1996-2007, in order to test the impact of the 1995 December Customs Union agreement between Turkey and EU countries. The trade function has been determined by the stock of Turkish population, per capita real income, real exchange rate, and the lagged dependent variable. It has been found that Turkish emigrants have significantly positive effect on trade mainly after the Custom Union Agreement, through the preference and network channels.Migration; Trade; Panel data; Dynamic models; Turkey

trade implications of extending the turkey-eu customs union agreement to agricultural products

Turkey’s membership of EU will lead to the enlargement of already established customs union between EU and Turkey for the agricultural products. This involves not only a full liberalization of agricultural trade within the EU but also the implementation of a Common external tariff. In this new situation, trade diversion and creation effects for agro-food trade will emerge. In terms of article XXIV of GATT, the possible results of these counteracting effects are important. In this paper, using the Armington assumption, the trade diversion and creation effects of Turkey’s membership for the agricultural trade will be calculated and analyzed.Elasticities of Substitution, Armington Elasticities, Fixed Effect Panel, Random Effect Panel, Trade Creation, Trade Diversion, EU Membership of Turkey, Agricultural Products, Turkey, Article XXIV of GATT, Turkish Agricultural Sector Model, TAGRIS

Structural Change and Market Opening in Agriculture: Turkey towards EU Accession

The membership negotiations of Turkey with EU may start after satisfactory developments in the Copenhagen Criteria. Agriculture is expected to be one of the toughest areas in the accession negotiations. The difficulty will not only arise from the state of agriculture in Turkey, but also from the ever changing agricultural policy framework of EU. The structural and institutional adjustment abilities of Turkey during the pre-accession period will be the determining factors to ease the accession. The purpose of this study is to identify major elements in the pre-accession period through the description of agricultural environment in Turkey, together with the possible effects of accession on agriculture. Land and labor stem as the major divergences from the EU averages, and hence will form the basis of the accession negotiations. The next section is devoted to the structure of the basic factors of production in agriculture and to a general overview of agricultural production. The recent policy shifts and the costs and benefits of the agricultural policies are provided in the second section. The recent developments in the trade between EU and Turkey and the trade potential are presented in the third section. The last section is reserved for the concluding remarks.Turkey, European Union, agriculture