Competitive effects of redroot pigweed (Amaranthus retroflexus) on the growth indices and yield of corn

Kaveh Sheibany,Mohammad Ali,Baghestani Meybodi,ALireza Atri 한국잡초학회 2009 Weed Biology and Management Vol.9 No.2

Constructability optimal design of reinforced concrete retaining walls using a multi-objective genetic algorithm

Kaveh, A.,Kalateh-Ahani, M.,Fahimi-Farzam, M. Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.47 No.2

The term "constructability" in regard to cast-in-place concrete construction refers mainly to the ease of reinforcing steel placement. Bar congestion complicates steel placement, hinders concrete placement and as a result leads to improper consolidation of concrete around bars affecting the integrity of the structure. In this paper, a multi-objective approach, based on the non-dominated sorting genetic algorithm (NSGA-II) is developed for optimal design of reinforced concrete cantilever retaining walls, considering minimization of the economic cost and reinforcing bar congestion as the objective functions. The structural model to be optimized involves 35 design variables, which define the geometry, the type of concrete grades, and the reinforcement used. The seismic response of the retaining walls is investigated using the well-known Mononobe-Okabe analysis method to define the dynamic lateral earth pressure. The results obtained from numerical application of the proposed framework demonstrate its capabilities in solving the present multi-objective optimization problem.

A hybrid CSS and PSO algorithm for optimal design of structures

Kaveh, A.,Talatahari, S. Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.42 No.6

A new hybrid meta-heuristic optimization algorithm is presented for design of structures. The algorithm is based on the concepts of the charged system search (CSS) and the particle swarm optimization (PSO) algorithms. The CSS is inspired by the Coulomb and Gauss's laws of electrostatics in physics, the governing laws of motion from the Newtonian mechanics, and the PSO is based on the swarm intelligence and utilizes the information of the best fitness historically achieved by the particles (local best) and by the best among all the particles (global best). In the new hybrid algorithm, each agent is affected by local and global best positions stored in the charged memory considering the governing laws of electrical physics. Three different types of structures are optimized as the numerical examples with the new algorithm. Comparison of the results of the hybrid algorithm with those of other meta-heuristic algorithms proves the robustness of the new algorithm.

Polystyrene Supported Al(OTf)3: a Stable, Efficient, Selective, and Reusable Catalyst for Sulfonylation of Arenes with Sulfonic Acids

Kaveh Parvanak Boroujeni 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.7

Cross-linked polystyrene supported aluminium triflate (Ps-Al(OTf)3) was found to be an efficient and chemoselective heterogeneous Lewis acid catalyst for the direct conversion of arenes to sulfones using sulfonic acids as sulfonylating agents. The solid acid catalyst is stable (as a bench top catalyst) and can be easily recovered and reused without appreciable change in its efficiency.

Modeling Multi-phase Multi-component LNAPL Dynamics and Recover in the Subsurface

( Kaveh Sookhak Lari ),( Greg B Davis ),( John L Rayner ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2

Light non-aqueous phase liquids (LNAPLs), such as petroleum fuels, consist of thousands of compounds that partition and pose risks to different phases and domains. Our intention is to elucidate how multiphase and multicomponent modelling helps better understand the short and long term fate, recovery performance and risks of LNAPL contamination in subsurface media. We report some recent applications and our modifications to TMVOC / TMVOC-MP, to track natural behaviours and remediation strategies for LNAPL soil and groundwater contamination problems. We report studies on LNAPL natural dynamics and partitioning, measurements of soil gas contamination, verifications of modelling complex recovery approaches to determine LNAPL recovery endpoints and computational techniques for optimizing LNAPL remediation. It is shown how complex phenomena such as hysteresis with theoretically unlimited cycles and new constitutive relationships were added to the codes. The cases reported show the criticality of linking multiphase and multicomponent features for LNAPLs. This is key to improved and optimized LNAPL recovery plans, estimation of endpoints associated with different remediation techniques, representative risk assessments and modelling natural source zone depletion (NSZD).

KOREA AND THE MING TRIBUTE SYSTEM IN KHATAYI’S BOOK OF CHINA

KAVEH L. HEMMAT 계명대학교 한국학연구원 2018 Acta Koreana Vol.21 No.1

The Book of China (Khataynameh), a description of China written in 1516, in Persian, for the Ottoman court by a Central Asian merchant, includes a brief section on Korea in the chapter on the twelve provinces of China, which describes habitual interaction between Muslim and Korean merchants. The brevity of this notice and the mis-categorization of Korea as a province of the Ming state might appear to indicate that the author was largely uninformed about Korea and its political relationship to China. However, the didactic and political nature of the text, which presented a utopian image of China as a model to be emulated by a nascent Ottoman Empire, as well as the author’s more general familiarity with East Asian cultural and political circumstances, suggest that his subsuming of the Chosŏn state into the Ming empire was more an ideologically-motivated choice than a manifestation of negligence or ignorance. The image of economic and military power conveyed through the Ming tribute system formed the basis of a political ideal of universal empire; conveying this ideal was the principal goal of the text. The author’s fealty to an idealized formulation of imperial authority echoes the Chosŏn elite’s own strategy for balancing political independence with material support and cooperation from the Ming, by adhering closely to a Sinocentric Neo-Confucian ideology. The Book of China thus attests to, and constitutes part of, a global process of political communication that connected the Ottoman Empire with Central Asia, China, and Korea.

Simultaneous analysis, design and optimization of trusses via force method

Kaveh, A.,Bijari, Sh. Techno-Press 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.65 No.3

In this paper, the Colliding Bodies Optimization (CBO), Enhanced Colliding Bodies Optimization (ECBO) and Vibrating Particles System (VPS) algorithms and the force method are used for the simultaneous analysis and design of truss structures. The presented technique is applied to the design and analysis of some planer and spatial trusses. An efficient method is introduced using the CBO, ECBO and VPS to design trusses having members of prescribed stress ratios. Finally, the minimum weight design of truss structures is formulated using the CBO, ECBO and VPS algorithms and applied to some benchmark problems from literature. These problems have been designed by using displacement method as analyzer, and here these are solved for the first time using the force method. The accuracy and efficiency of the presented method is examined by comparing the resulting design parameters and structural weight with those of other existing methods.

Effect of fineness of high lime fly ash on pozzolanic reactivity and ASR mitigation

Kaveh Afshinnia,Prasada R. Rangaraju 사단법인 한국계산역학회 2017 Computers and Concrete, An International Journal Vol.20 No.2

Typically, high lime fly ash (Class C) has been characterized as a fly ash, which at lower replacement levels is not as effective as the low lime (Class F) fly ash, in mitigating alkali-silica reaction (ASR) in portland cement concrete. The influence of fineness of Class C, obtained by grinding virgin fly ash into finer particles, on its pozzolanic reactivity and ASR mitigation performance was investigated in this study. In order to assess the pozzolanic reactivity of mortar mixtures containing virgin or ground fly ashes, the strength activity index (SAI) test and thermo-gravimetric analysis (TGA) were conducted on the mortar cubes and paste samples, respectively, containing virgin fly ash or two ground fly ashes. In addition, to evaluate any improvement in the ASR mitigation of ground fly ashes compared to that of the virgin fly ash, the accelerated mortar bar test (AMBT) was conducted on the mortar mixtures containing different dosages of either virgin or ground fly ashes. In all tests crushed glass aggregate was used as a highly reactive aggregate. Results from this study showed that the finest fly ash (i.e., with an average particle size of 3.1 microns) could increase the flow ability along with the pozzolanic reactivity of the mortar mixture. However, results from this study suggested that the fineness of high lime fly ash does not seem to have any significant effect on ASR mitigation.

Seismic design of steel frames using multi-objective optimization

Kaveh, A.,Shojaei, I.,Gholipour, Y.,Rahami, H. Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.45 No.2

In this study a multi-objective optimization problem is solved. The objectives used here include simultaneous minimum construction cost in term of sections weight, minimum structural damage using a damage index, and minimum non-structural damage in term of inter-story drift under the applied ground motions. A high-speed and low-error neural network is trained and employed in the process of optimization to estimate the results of non-linear time history analysis. This approach can be utilized for all steel or concrete frame structures. In this study, the optimal design of a planar eccentric braced steel frame is performed with great detail, using the presented multi-objective algorithm with a discrete population and then a moment resisting frame is solved as a supplementary example.

Solving a New Multi-Period Multi-Objective Multi-Product Aggregate Production Planning Problem Using Fuzzy Goal Programming

Kaveh Khalili-Damghani,Ayda Shahrokh 대한산업공학회 2014 Industrial Engineeering & Management Systems Vol.13 No.4

This paper introduces a new multi-product multi-period multi-objective aggregate production planning problem. The proposed problem is modeled using multi-objective mixed-integer mathematical programming. Three objective functions, including minimizing total cost, maximizing customer services level, and maximizing the quality of endproduct, are considered, simultaneously. Several constraints such as quantity of production, available time, work force levels, inventory levels, backordering levels, machine capacity, warehouse space and available budget are also considered. Some parameters of the proposed model are assumed to be qualitative and modeled using fuzzy sets. Then, a fuzzy goal programming approach is proposed to solve the model. The proposed approach is applied on a real-world industrial case study of a color and resin production company called Teiph-Saipa. The approach is coded using LINGO software. The efficacy and applicability of the proposed approach are illustrated in the case study. The results of proposed approach are compared with those of the existing experimental methods used in the company. The relative dominance of the proposed approach is revealed in comparison with the experimental method. Finally, a data dictionary, including the way of gathering data for running the model, is proposed in order to facilitate the reimplementation of the model for future development and case studies.