An expanded set of sites, a more differentiated references and linguistic diversification have been discussed as needed changes in urban studies. The critiques the limitations studies, terms both scholarship scholars, offer important concrete responses to expanding scope field. Yet this tremendous special issue on ‘Comparative Methods for Global Urban Studies’ with 10 papers cutting across rang...

It is conjectured that a hyperbolic knot complement does not contain a closed embedded totally geodesic surface. In this paper, we show that there are no such surfaces in the complements of hyperbolic 3-bridge knots and double torus knots. Some topological criteria for a closed essential surface failing to be totally geodesic are given. Roughly speaking, sufficiently ‘complicated’ surfaces can ...

Some 2-iminothiazolidin-4-ones have been synthesized by the reaction of dialkyl acetylenedicarboxylates with thiosemicarbazones. The reaction was performed in the presence of 10 mol% of triphenylphosphine and tetrabutylammonium bromide as a phase transfer catalyst in water as a green solvent. All the synthesized compounds were characterized by their physical and spectral data.

Given the importance of physical activities for children of preschool age, it merits a critical viewing of the textbooks used at this level in order to improve the textbooks content where it may be needed. To this end, three such books published under the supervision of Tehran’s Department of Elementary Education in 2014, were selected, and reviewed for any words, sentences, and pictures relate...

purpose: the main aim of this study was to determine the cost-utility of the integrated systems in the iranian academic libraries. methodology: this applied research was conducted through a survey method. the statistical population consisted of 118 academic libraries among which 75 libraries were selected using stratified sampling method. the researcher-made questionnaire was distributed among ...

the augmented gravity model was employed to determine iran's trading model and agricultural export directions in the case of cross section analysis in 2005 for 64 countries which are considered as iran's main export market. besides, another explanatory variable named trade conformity index (tci) was added to the model. this index was employed to identify iran's trading model. als...

Results of the ULF geomagnetic monitoring of the volcano Popocatepetl (Mexico) and their analysis are summarized and presented for the period 2003–2006. Our analysis reveals some anomalies which are considered to be of local volcanic origin: the EM background in the vicinity of the volcano was found to be significantly noisier than at other reference stations; sporadic strong noise-like geomagn...