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Papers by mostafa adibnezhad
Boreal Biome(Russia and Scandinavia
Boreal forest_Russia & Scandinavia
except for brief excerpts in connection with reviews or scholarly analysis. Use in connection wit... more except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights.
The study focused on the effect of different intensities of fire on physical and chemical propert... more The study focused on the effect of different intensities of fire on physical and chemical properties of soil in Zagros forests of western Iran. The dominant tree species in these forests is oak (Quercus persica). Three sites were selected; high severity burned site (HS), low severity burned site (LS) and control (not burned) site (C). Soil chemical properties such as: organic matter (OM), the total nitrogen (N), NO 3 -N, soluble potassium (K), soil phosphorus (P), pH, soil electrical conductivity (EC), cation exchangeable capacity (CEC), base cations (Ca, Mg, Na), CO 2 and soil physical properties such as saturation percentage (SP), bulk density (BD), sand, clay and silt percentages were assessed in soil samples. To determine significance of differences among the three observed sites and most effective variables in the separation of sample plots, one-way analysis of variance and principal component analysis were used, respectively. Mean pH, N, NO 3 -N, OM, SP, P, K, and CEC at HS site were lower than at the sites with other fire intensities but the EC value for HS site was higher in comparison with other sites observed. According to Duncan's test, mean BD value for HS site was higher when compared with other sites but SP value was comparatively lowest. At LS site, mean sand content was lowest and the amount of silt was highest, in comparison with other sites. The results showed that observed fire severities had significant effects on physical and chemical properties of soil, yet fire low severity and control sites were very similar to each other in terms of investigated factors. Therefore, it can be concluded that lowseverity fire regime has no significant influence on soil properties. In a management strategy, controlled low-severity fire regime can be an alternative management tool in improving soil conditions.
what DEA is, ii) how to apply DEA to identify paths to improve service performance, Hi) how the r... more what DEA is, ii) how to apply DEA to identify paths to improve service performance, Hi) how the reader can try DEA using Microsoft® Excel, and iv) how to use the Excel Solver based DEA software -DEAFrontier.
In the three decades since the publication of classic article on the topic, data envelopment anal... more In the three decades since the publication of classic article on the topic, data envelopment analysis, or DEA, has become very popular. From 1978 to 2001, over 3,000 publications by over 2,000 authors have used DEA . The purpose of this paper is to present DEA in a way that is appropriate for new users at all levels. This paper is written with a minimum of technical language and assumptions as to the readers' prior knowledge. In this way, it represents a stand-alone lesson in DEA that is appropriate for undergraduate students. On the other hand, rather than completely omitting advanced topics appropriate for more demanding users; these topics are touched on briefly and interested readers are directed to other works that address such advanced topics in more detail.
Boreal Biome(Russia and Scandinavia
Boreal forest_Russia & Scandinavia
except for brief excerpts in connection with reviews or scholarly analysis. Use in connection wit... more except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights.
The study focused on the effect of different intensities of fire on physical and chemical propert... more The study focused on the effect of different intensities of fire on physical and chemical properties of soil in Zagros forests of western Iran. The dominant tree species in these forests is oak (Quercus persica). Three sites were selected; high severity burned site (HS), low severity burned site (LS) and control (not burned) site (C). Soil chemical properties such as: organic matter (OM), the total nitrogen (N), NO 3 -N, soluble potassium (K), soil phosphorus (P), pH, soil electrical conductivity (EC), cation exchangeable capacity (CEC), base cations (Ca, Mg, Na), CO 2 and soil physical properties such as saturation percentage (SP), bulk density (BD), sand, clay and silt percentages were assessed in soil samples. To determine significance of differences among the three observed sites and most effective variables in the separation of sample plots, one-way analysis of variance and principal component analysis were used, respectively. Mean pH, N, NO 3 -N, OM, SP, P, K, and CEC at HS site were lower than at the sites with other fire intensities but the EC value for HS site was higher in comparison with other sites observed. According to Duncan's test, mean BD value for HS site was higher when compared with other sites but SP value was comparatively lowest. At LS site, mean sand content was lowest and the amount of silt was highest, in comparison with other sites. The results showed that observed fire severities had significant effects on physical and chemical properties of soil, yet fire low severity and control sites were very similar to each other in terms of investigated factors. Therefore, it can be concluded that lowseverity fire regime has no significant influence on soil properties. In a management strategy, controlled low-severity fire regime can be an alternative management tool in improving soil conditions.
what DEA is, ii) how to apply DEA to identify paths to improve service performance, Hi) how the r... more what DEA is, ii) how to apply DEA to identify paths to improve service performance, Hi) how the reader can try DEA using Microsoft® Excel, and iv) how to use the Excel Solver based DEA software -DEAFrontier.
In the three decades since the publication of classic article on the topic, data envelopment anal... more In the three decades since the publication of classic article on the topic, data envelopment analysis, or DEA, has become very popular. From 1978 to 2001, over 3,000 publications by over 2,000 authors have used DEA . The purpose of this paper is to present DEA in a way that is appropriate for new users at all levels. This paper is written with a minimum of technical language and assumptions as to the readers' prior knowledge. In this way, it represents a stand-alone lesson in DEA that is appropriate for undergraduate students. On the other hand, rather than completely omitting advanced topics appropriate for more demanding users; these topics are touched on briefly and interested readers are directed to other works that address such advanced topics in more detail.