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ASADOV, FARDA Academia Via Serica 2019 Acta Via Serica Vol.4 No.1
Bloody wars between Arab Muslims and Khazar Turks in the Caucasus continued for a more than a hundred years from the mid $7^{th}$ century to the end of the $8^{th}$ century CE. The Khazar state survived but had to withdraw from Caucasian Albania, the present territory of the Republic of Azerbaijan. However, the Khazars managed to expand their political control over the trade routes north-east and north-west of the Caucasian ridge. A trade partnership was established between former rival powers in the region that allows us to call the period after the end of the Arab-Khazar wars up to the time of the collapse of the Khazar state in the middle of the 10th century an era of Arab-Khazar partnership and domination of the Silk Road. This article highlights the impact made by geopolitical shifts in the regions of the time upon international trade tracks and particularly on the development of trade facilities, infrastructure, and local production in Azerbaijan, which became a major transit country of goods from the north to markets in the Muslim Near East.
ASADOV, FARDA Academia Via Serica 2016 Acta Via Serica Vol.1 No.1
The article studies the new situation in international long distance trade after the emergence of new superpower - Arab Caliphate - in Eurasian overland tracks of the Great Silk Road. The stages of Arab advancement along trade routes and outcomes of their contestation with the strong tribal confederations of Turkic nomads in Central Asia and the Caucasus are highlighted. A special focus is made upon the relationship of Arabs with Khazar Turks who have endured severe clashes with strongest army of the time in the region. Khazar kingdom survived and even expanded its control over the tracks of international trade in the western part of Eurasia. The research describes the way how trade partnership between Arabs and Turks was shaped in the aftermath of military clashes. Existing scholarly views on the role of Khazar in Silk Road are reviewed and unattended evidence of Arab sources are involved to support concluding points that Khazar state managed to consolidate various actors for maintenance of international trade such as so called Rus warriors and merchants in the west of Volga, nomadic tribes in Eurasian steppes, and Jewish trading gild named ar-rahdaniyya in Arab sources. It is asserted that Khazar state since the second half of 9th century through its decline in mid 10th century not only served as transit space for goods of exporting countries but also exported goods of its own crafts and natural resources.
ASADOV, FARDA Academia Via Serica 2017 Acta Via Serica Vol.2 No.2
Several theories about the ancestry of the Khazars and the origins of the Khazar state have been suggested to date. None of them provides a comprehensive solution for the controversial data of the written sources on the early history of the Khazars. This article investigates a possible link between the title of Kagan-Bek of the Deputy Kagan of the Khazars and a similar title Ellac/Ilek of the Akatsir-Huns. This study of the title argues for statehood and political culture connections between the earliest Turkic tribes of Western Eurasia and the Khazars and Turks of Central Asia.
Asadov, Ziyafaddin H.,Ahmadova, Gulnara A.,Rahimov, Ravan A.,Mammadova, Khuraman A. Korean Chemical Society 2011 대한화학회지 Vol.55 No.6
Novel surfactants have been synthesized by catalytic chloropropoxylation reaction of carboxylic acid fractions of sunflower, olive, cottonseed, soya-bean, castor and corn oils with 2-(chloromethyl)oxirane. Colloidal-chemical parameters as well as petroleum-collecting and petroleum-dispersing capacities of the synthesized chloropropoxylate esters having heterochain of various lengths have been determined. Influence of carboxylic acid fractions composition and length of chloroxypropylene chain on petroleum-collecting and dispersing capacities has been revealed.
Thermostimulated Luminescence of GaS:Yb Crystals
Rahim Salim Madatov,Fargan Gabil Asadov,Elshan Gabil Asadov,Tural Gulu Naghiyev 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.74 No.5
The thermoluminescence of Yb-doped GaS upon UV irradiation has been studied in the course of linear heating. The observed thermostimulated emission bands are found to be complex and to consist of several strongly overlapping partial maxima. The activation energies, capture cross sections, frequency factors and concentrations of the trap levels responsible for these peaks are determined.
Elgun E. Hasanov,Ravan A. Rahimov,Yusif Abdullayev,Ziyafaddin H. Asadov,Gulnara A. Ahmadova,Aygun M. Isayeva,Saida F. Ahmadbayova,Fedor I. Zubkov,Jochen Autschbach 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.86 No.-
Six cocogem surfactants were synthesized from N,N,Nʹ,Nʹ-tetra-(propane-2-olyl)-1,6-hexanediamine andhigher monocarboxylic acids: capric, lauric, myristic, palmitic, stearic and oleic. N,N,Nʹ,Nʹ-tetra-(propane-2-olyl)-1,6-hexanediamine was synthesized from hexamethylenediamine and propylene oxide at roomtemperature, without utilizing any catalyst or solvent. Surface tension, conductivity, foaming ability,foam stability, emulsion stability, viscosity and density measurements were performed on aqueoussolutions of all cocogem surfactants. Their surface activity and colloidal-chemical parameters such ascritical micelle concentration (CMC), surface pressure at CMC (pCMC), surface tension at CMC (gCMC),surface excess (Gmax), concentration required for 20 mN/m reduction of surface tension (C20), Gibbsenergies of adsorption and micellization (DGad and DGmic) were recorded and variation of theseparameters based on hydrophobic chain length and structure was investigated experimentally andcomputationally. Synthesized surfactants with myristic, palmitic, and stearic tail continued to decreasesurface tension even above CMC. The possible reason of this unusual behavior was determined based oncomputational studies. Surface activity parameters of cocogem surfactant with oleic tail disobeyed thegeneral tendency established by other cocogems with saturated tail group. Palmitic and stearic acid basedcocogem surfactants had good foam stability and the reason of this high foam stability was rationalizedwith high viscosity of their solutions.
Structural, electrical and transparent properties of ZnO thin films prepared by magnetron sputtering
W. Gao,J. Metson,Z. Li,M. Hodgson,A. Asadov,J. Lee 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
Zinc oxide (ZnO) thin lms were prepared by d.c. (direct current) or r.f. (radio frequency) magnetron sputtering on glass sub-strates. The structural, electrical and optical properties of the lms were studied. It has been found that most lms produced by d.c.sputtering are not electrically conductive or have a high resistance above 10Xm, while the lms produced using r.f. sputtering aresignicantly more conductive. The optical transmittance at 550 nm is around 80% or higher for most lms. The energy band gaps ofthe ZnO lms prepared by d.c. sputtering are smaller than the lms prepared by r.f. sputtering. It is also found that the lms preparedusing an electrical bias have higher resistivity than those produced without bias. It has been observed by SEM that the conductive films show less porosity between the grains than the poor conductive lms. Conductive ZnO lms show a smallerd spacing than thenon-conductive lms. The results reveal that crystal microstructure and density of the ZnO lms aect their conductivity.