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Keles S.,Cankr Karatekin University
International Journal of Sustainable Development and World Ecology | Year: 2010

The integration of carbon sequestration value of forest ecosystems into forest management planning models has become increasingly important in sustainable forest management. This study analyses the economic effects of different minimum cutting ages on timber and carbon sequestration values for a Scots pine forest clumped mainly in older age classes in northeast Turkey. The analysis is performed by formulating three optimisation models. The objective of each model is to maximise net present value (NPV) of harvested timber, net present value of carbon sequestration and the total net present value of timber production and carbon sequestration, respectively. Results showed that increasing the minimum cutting ages by 10 years increased the NPV of timber by 10.5%. However, the current minimum cutting ages were optimal for maximizing the NPV of carbon and the sum of the NPV of timber and carbon benefits. In addition, the model outputs were found to be quite sensitive to unit carbon prices. © 2010 Taylor & Francis. Source


Baskent E.Z.,Karadeniz Technical University | Keles S.,Cankr Karatekin University
Scandinavian Journal of Forest Research | Year: 2014

Decision support systems (DSSs) are indispensable tools in preparing a forest management plan for a better combination of multiple forest values. This study attempted to develop and explain a stand-based forest management DSS (Ecosystem-based multiple-use forest planning [ETÇAP]) comprising a traditional simulation, linear programming (LP), metaheuristics and geographic information system. The model consists of five submodels; traditional management approach to handle inventory data, an empirical growth and yield model, a simulation to conceptualize management actions, a LP technique to optimize resource allocation and a simulated annealing approach to directly create a spatially feasible harvest schedule. The ETÇAP model has been implemented in a comparative two case study areas; Denizli–Honaz and Akseki–Ibradı. Both simulation and optimization models outperformed to the traditional management plan. The periodical change of growing stock, allowable cuts, carbon sequestration and water production are used as performance indicators. The results showed that more amount of wood could be harvested over time compared to traditional level of harvesting. It could be concluded that various management strategies allowed managers to stimulate more decision options for better outputs through intertemporal trade-offs of management interventions as the model provided tools to quantify forest dynamics over time and space. Challenges exist to establish the functional relationships between forest structure and values for better quantification and integration into the management plans. © 2013, © 2013 Taylor & Francis. Source


Objective: Mycobacterium tuberculosis (MTB) is an obligate aerobe bacterial pathogen. Here, the citrate synthase (CS) family, an important component of aerobic respiration, was investigated in MTB. Methods: MTB genome was analyzed in silico to reveal the members of CS family. The nucleotide and amino acid sequences were retrieved from the NCBI database, and searched for the similarity using the NCBI BLAST tool. Sequence alignment and phylogenetic analysis were performed using MEGA6. The physicochemical parameters, cellular localization, HMM profiles, motif structure, 3D modeling, and the interactions of the proteins were analyzed using GPMAW, PSORTb, Pfam and SMART, MEME, Phyre2, and STRING databases, respectively. Results: The members of CS family in MTB were identified as CitA, GltA2, and PrpC. The CitA and PrpC were found to be closer in phylogeny than GltA2, and the trees of three proteins were shown to be similar to that constructed based on 16S rRNA in mycobacteria. The CitA contains two CS domains while a single CS domain is found in GltA2 and PrpC. Besides, LHGGA and MGFGHRVY motifs are conserved in MTB and various bacteria. The molecular weight and pI values of CitA, GltA2, and PrpC were calculated as 40.1, 47.9, and 42.9 kDa, and 5.41, 5.35, and 9.31, respectively. Cellular localization of the proteins was predicted as cytoplasm. The highest expression ratio was found to be for gltA2 followed by prpC and citA, respectively, in the retrieved RNA-seq datasets obtained from the aerobic log phase of MTB H37Rv. Conclusion: This comprehensive bioinformatics analysis of CS family in MTB has a contribution to the knowledge of the genetics and physiology of this pathogen. © 2016, Turkish Biochemistry Society. All rights reserved. Source


Karaaslan F.,Cankr Karatekin University
Neural Computing and Applications | Year: 2016

Neutrosophic set theory based on neutrosophy, which is a branch of philosophy, is an important tool for dealing with uncertainty and inconsistency data. Concept of single-valued neutrosophic set is defined as a generalization of the concept of single-valued neutrosophic set, which is useful to model some engineering applications. In this study, the concept of single-valued neutrosophic refined soft set is defined as an extension of single-valued neutrosophic refined set. Also, set theoretical operations between two single-valued neutrosophic refined soft sets are defined and some basic properties of these operations are investigated. Furthermore, two methods to calculate correlation coefficient between two single-valued neutrosophic refined soft sets are proposed, and a clustering analysis application of one of proposed methods is given. © 2016 The Natural Computing Applications Forum Source


Korkmaz A.,Cankr Karatekin University | Dag I.,Eskiehir Osmangazi University
Journal of the Franklin Institute | Year: 2011

Nonlinear Burgers equation is solved using polynomial based differential quadrature method (PDQ). Numerical simulations are studied for three well known test problems, namely shock-like solution, travelling wave and sinusoidal disturbance solutions of Burgers equation. Obtained numerical results of the first and the third test problems are compared with some earlier numerical results. Discrete root mean square error norm and maximum error norm are computed for the first two test problems and a comparison with some earlier works is given. © 2011 Published by Elsevier Ltd. on behalf of The Franklin Institute All rights reserved. All rights reserved. Source

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