Tessarotto, M. | Ellero, M. | Aslan, N. | Mond, M. | Nicolini, P.

Conference Object | 2009 | AIP Conference Proceedings1084 , pp.224 - 229

An important aspect of computational fluid dynamics is related to the determination of the fluid pressure in isothermal incompressible fluids. In particular this concerns the construction of an exact evolution equation for the fluid pressure which replaces the Poisson equation and yields an algorithm which is a Poisson solver, i.e., it permits to time-advance exactly the same fluid pressure without solving the Poisson equation. In fact, the incompressible Navier-Stokes equations represent a mixture of hyperbolic and elliptic pde's, which are extremely hard to study both analytically and numerically. This amounts to transform an elli . . .ptic type fluid equation into a suitable hyperbolic equation, a result which usually is reached only by means of an asymptotic formulation. Besides being a still unsolved mathematical problem, the issue is relevant for at least two reasons: a) the proliferation of numerical algorithms in computational fluid dynamics which reproduce the behavior of incompressible fluids only in an asymptotic sense (see below); b) the possible verification of conjectures involving the validity of appropriate equations of state for the fluid pressure. Another possible motivation is, of course, the ongoing quest for efficient numerical solution methods to be applied for the construction of the fluid fields {?, V, p}, solutions of the initial and boundary-value problem associated to the incompressible N-S equations (INSE). In this paper we intend to show that an exact solution to this problem can be achieved adopting the approach based on inverse kinetic theory (IKT) recently developed for incompressible fluids by Tessarotto et al. [7, 6, 7, 8, 9]. In particular we intend to prove that the evolution of the fluid fields can be achieved by means of a suitable dynamical system, to be identified with the so-called Navier-Stokes (N-S) dynamical system. As a consequence it is found that the fluid pressure obeys a well-defined evolution equation. The result appears relevant for the construction of Lagrangian approaches to fluid dynamics. © 2009 American Institute of Physics Daha fazlası Daha az

Yildirim, E. | Kul, R. | Turan, M. | Ekinci, M. | Alak, G. | Atamanalp, M.

Conference Object | 2016 | AIP Conference Proceedings1726 , pp.224 - 229

Present experiment was designed to determine the response of various dozes of fish manure (FM) and commercial fertilizers on plant growth, yield and nutrient content of lettuce. The treatments consisted of fish manure, commercial fertilizer and the combination of fish manure and commercial fertilizer with four dozes of nitrogen (0kg/ha, 100kg/ha, 150kg/ha and 200kg/ha). The results of the study showed that treatments significantly affected the growth and chemical characteristics of lettuce. The best results in regard to plant growth and yield were obtained from 100 and 150kg kg/ha nitrogen dozes of the combination of fish manure and . . . commercial fertilizer. © 2016 Author(s) Daha fazlası Daha az

Pedamallu, C.S. | Ozdamar, L. | Weber, G.-W. | Kropat, E.

Conference Object | 2010 | AIP Conference Proceedings1239 , pp.321 - 325

The system dynamics approach is a holistic way of solving problems in real-time scenarios. This is a powerful methodology and computer simulation modeling technique for framing, analyzing, and discussing complex issues and problems. System dynamics modeling and simulation is often the background of a systemic thinking approach and has become a management and organizational development paradigm. This paper proposes a system dynamics approach for study the importance of infrastructure facilities on quality of primary education system in developing nations. The model is proposed to be built using the Cross Impact Analysis (CIA) method . . .of relating entities and attributes relevant to the primary education system in any given community. We offer a survey to build the cross-impact correlation matrix and, hence, to better understand the primary education system and importance of infrastructural facilities on quality of primary education. The resulting model enables us to predict the effects of infrastructural facilities on the access of primary education by the community. This may support policy makers to take more effective actions in campaigns. © 2010 American Institute of Physics Daha fazlası Daha az

Çulha, Mustafa

Conference Object | 2010 | AIP Conference Proceedings1267 , pp.86 - 87

Northeastern University;Boston University and The Photonics Center;Horiba Scientific;Thermo Scientific;Bruker Optics 22nd International Conference on Raman Spectroscopy, ICORS 2010 -- 8 August 2010 through 13 August 2010 -- Boston, MA -- 82663

Dursun, A. | Yildirim, E. | Ekinci, M. | Turan, M. | Kul, R. | Karagöz, F.P.

Conference Object | 2017 | AIP Conference Proceedings1833 , pp.86 - 87

This study was designed to determine the influence of a nitrogen fixing plant growth promoting rhizobacteria (PGPR) inoculation (seed coating and seedling dipping) and 6 doses of nitrogen (0, 40, 80, 120, 160, 200kg ha-1) application on amino acid contents of cabbage. Coating and seedling dipping applications caused a significant increase in values histidine, glycine, thionin, arginine and alanine of cabbage. Highest glutamate, serine, asparagines and glutamine contents were obtained from 160-200kg ha-1 nitrogen dose applied plants. As a result, the use of bacteria treatments provides means of improving amino acid contents in cabbag . . .e. © 2017 Author(s) Daha fazlası Daha az

Kaplanoglu, E. | Şafak, K.K. | Varol, H.S.

Conference Object | 2009 | AIP Conference Proceedings1089 , pp.35 - 45

An experiment based method is proposed for parameter estimation of a class of linear multivariable systems. The method was applied to a pressure-level control process. Experimental time domain input/output data was utilized in a gray-box modeling approach. Prior knowledge of the form of the system transfer function matrix elements is assumed to be known. Continuous-time system transfer function matrix parameters were estimated in real-time by the least-squares method. Simulation results of experimentally determined system transfer function matrix compare very well with the experimental results. For comparison and as an alternative t . . .o the proposed real-time estimation method, we also implemented an offline identification method using artificial neural networks and obtained fairly good results. The proposed methods can be implemented conveniently on a desktop PC equipped with a data acquisition board for parameter estimation of moderately complex linear multivariable systems. © 2009 American Institute of Physics Daha fazlası Daha az

Kahraman, M. | Sur, I. | Çulha, Mustafa

Conference Object | 2010 | AIP Conference Proceedings1267 , pp.1055 - 1056

Northeastern University;Boston University and The Photonics Center;Horiba Scientific;Thermo Scientific;Bruker Optics 22nd International Conference on Raman Spectroscopy, ICORS 2010 -- 8 August 2010 through 13 August 2010 -- Boston, MA -- 82663

Kalemci, M. | Ince, A.T. | Bonnier, G.

Conference Object | 2013 | AIP Conference Proceedings1552 8 , pp.227 - 231

National Institute of Standards and Technology;Measurement Science Conference;Fluke Corporation;Measurements International;Chino Corporation 9th International Temperature Symposium on Temperature: Its Measurement and Control in Science and Industry, ITS 2012 -- 19 March 2012 through 23 March 2012 -- Los Angeles, CA --

Yanmiş, D. | Orhan, F. | Güllüce, M. | Şahin, Fikrettin

Conference Object | 2017 | AIP Conference Proceedings1833 , pp.227 - 231

Magnesite, the main source for magnesium and magnesium derivatives, are also commonly used in the production of caustic, dead-burned and fused magnesia. World magnesite resources are estimated to be at 12 billion tonnes mostly located in China, Russia, North Korea, Australia and Turkey. Turkey is the second producer of the magnesite. Magnesite deposits in Turkey are sedimentary magnesite which have been formed in specific conditions as high concentrations of MgSO4 and CO2 and presence of certain organic salts or created by hot or cold dissolution connected with carbonate rocks mainly with dolomites. According to the genesis of magne . . .site deposits, they have some impurities as calcium, quartz, iron, etc. Impurities of magnesite, especially CaCO3, reduce its economic value and industrial usability. In our previous study, we have performed biotechnologically enrichment of magnesite by Lactococcus sp., which gave significantly important results. However, we had no information about carbonate dissolution mechanism of bacteria. Therefore, it is aimed to reveal the metabolites of Lactococcus sp. and mechanism leading to the carbonate dissolution (MgCO3 and CaCO3). © 2017 Author(s) Daha fazlası Daha az

Ashyralyev, A. | Karaca, B.

Conference Object | 2016 | AIP Conference Proceedings1759 , pp.227 - 231

Complex model partial differential equations of arbitrary order are considered. The uniqueness of the Dirichlet problem is studied. It is proved that the Dirichlet problem for higher order of complex partial differential equations with one complex variable has infinitely many solutions. © 2016 Author(s).