Assessment of Tuta absoluta yield loss in Iranian tomato crops

Rostami E.,Madadi H.,Abbasipour H.,Fu J.,Cuthbertson A.G.S. 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.4

The South American tomato pinworm, Tuta absoluta Meyrick (Lepidoptera: Gelechiidae), a devastating pest of tomato plants, originates from South America but it has been considered an invasive pest for Iran since 2010. To assess crop loss caused by this pest, a study was conducted in a 600 m 2 field under a randomised complete block design. The impact of different initial densities of T. absoluta, including control (without infestation), one, two, four, and eight T. absoluta eggs on each host plant in the first and second year was investigated with an additional treatment (16 pinworm eggs per host plant) used in the second year. Yield attributes including length and width of fruits, numbers of infested and intact fruits along with their weights were sampled and assessed on a weekly basis. In addition, the correlation between the number of galleries and these characteristics was also investigated. Crop loss data demonstrated that the effect of different infestation levels on fruit size and the weight of intact fruits was not significant over both years. However, the effect of treatment on the percentage and weight of infested fruits was shown to be significantly different in 2014 and 2015. Furthermore, there was a negative significant correlation between the number of galleries and weight of infested fruits in both years. Collectively, these results will be useful for enhancing pest management programs of T. absoluta in Iran

Effects of Plasma-Wall Interactions on Hydrogen Isotopes and Helium Plasma Particles in the JET-ILW Tokamak

Rostami S. Hesami,Motevalli S. M.,Fadaei F.,Mohammadi S. 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.12

Zero-dimensional global particle balance modeling was applied to the JET-ILW tokamak to investigate the particle balance in the main plasma and wall inventory, including the wall recycling effect, co-deposition, and sputtered particles. In this model, we used the fueling rate, based on the experimental work and vacuum pumping of the JET-ILW. Our modeling results were then compared with experimental data from the JET-ILW tokamak. A qualitative agreement was observed between the model results and the experimental data. In addition, this model could be a promising for studing the particle behavior in ITER-like reactors.

The Commutativity Degree in the Class of Nonabelian Groups of Same Order

Rostami, Hojjat Department of Mathematics 2019 Kyungpook mathematical journal Vol.59 No.2

The commutativity degree of a finite group is the probability that two randomly chosen group elements commute. In this paper we give a sharp upper bound of commutativity degree of nonabelial groups in terms of their order.

Structural characterization and RAW264.7 murine macrophage stimulating activity of a fucogalactoglucan from Colpomenia peregrina

Rostami, Zeynab,Tabarsa, Mehdi,You, SangGuan,Rezaei, Masoud Springer-Verlag 2018 Journal of food science and technology Vol.55 No.11

Applying SVM framework for modeling of CO₂ solubility in oil during CO₂ flooding

Rostami, Alireza,Arabloo, Milad,Lee, Moonyong,Bahadori, Alireza Elsevier 2018 Fuel Vol.214 No.-

<P><B>Abstract</B></P> <P>CO<SUB>2</SUB> solubility is one of the most important parameters that affects CO<SUB>2</SUB> flooding, because gas dissolution into crude oil results in oil swelling, viscosity reduction, IFT reduction, oil mobilization, and oil recovery improvement. Therefore, a better understanding of CO<SUB>2</SUB> solubility mechanisms and its influence on physical properties of crude oil are essential to any effective CO<SUB>2</SUB> flooding process. In this study, Least-Square Support Vector Machine (LSSVM) as a newly established soft computing algorithm is applied for developing a new correlative model for CO<SUB>2</SUB> solubility in both dead and live oil systems. CO<SUB>2</SUB> solubility in dead oil is basically affected by the oil saturation pressure (P<SUB>s</SUB>), oil specific gravity (<I>γ</I>), oil molecular weight (MW), and reservoir temperature (T). Moreover, the impact of bubble point pressure is considered in constructing the LSSVM model for the live oil. A number of statistical quality measures are utilized to assess and demonstrate the superior capability of the newly developed LSSVM model in comparison with the previous empirically derived correlations. The average absolute relative deviation (AARD) and coefficient of determination (R<SUP>2</SUP>) of 2.2783% and 0.9933 for the dead oil system, and 1.7432% and 0.9958 for the live oil system, respectively, verify the acceptable accuracy and efficient performance of the proposed LSSVM model over a wide range of dataset used in this study within the range of the used databank. However, the impact of CO<SUB>2</SUB> liquefaction pressure is ignored, the LSSVM model gives the best result. In conclusion, it is worth mentioning that the proposed LSSVM model can serve as an accurate correlative tool for fast and effective estimation of CO<SUB>2</SUB> solubility in both dead and live crude oils.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new soft computing model is established for CO<SUB>2</SUB> solubility prediction in both dead and live oil systems. </LI> <LI> Several statistical parameters are utilized to demonstrate the superiority of the suggested SVM model. </LI> <LI> The performance of the developed model is compared with other literature correlations. </LI> <LI> The proposed model can serve as accurate tool for effective estimation of CO<SUB>2</SUB>-crude oil solubility. </LI> <LI> The impact of all input variables on the target values based on different techniques is determined. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

High Quality DC-DC Boosting Converter Based on Cuk Converter and Advantages of Using It in Multilevel Structures

Rostami, Sajad,Abbasi, Vahid,Kerekes, Tamas The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.4

In this paper, a DC-DC converter is proposed based on the Cuk converter. The proposed converter has high efficiency and it can be used in multilevel DC-DC converters. A reduction of the inductors size in comparison to Cuk converter and a reduction in the inductors resistance negative effects on efficiency are the important points of the proposed converter. Its voltage ripple is reduced when compared to other converters. Its output voltage has a high quality and does not contain spikes. A theoretical analysis demonstrates the positive points of the proposed converter. The design and analysis of the converter are done in continues conduction mode (CCM). Experiments confirm the obtained theoretical equations. The proposed converter voltage gain is similar to that of a conventional Boost converter. As a result, they are compared. The comparison illustrates the advantages of the proposed converter and its higher quality. Furthermore, a prototype of the proposed converter and its combination with a 2x multiplier are built in the lab. Experimental results validate the analysis. In addition, they are in good agreements with each other.

Magnetic Nanoparticle Immobilized N-Propylsulfamic Acid as a Recyclable and Efficient Nanocatalyst for the Synthesis of 2H-indazolo[2,1-b]phthalazine-triones in Solvent-Free Conditions: Comparison with Sulfamic Acid

Rostami, Amin,Tahmasbi, Bahman,Yari, Ako Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.5

N-Propylsulfamic acid supported onto magnetic $Fe_3O_4$ nanoparticles (MNPs-PSA) was used as an efficient and magnetically recoverable catalyst for synthesis of 2H-Indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives from the three-component, one-pot condensation reaction of phthalhydrazide, aromatic aldehydes and cyclic 1,3-diones, in good to excellent yields at $100^{\circ}C$ under solvent-free conditions. The catalyst was easily separated with the assistance of an external magnetic field from the reaction mixture and reused for several consecutive runs without significant loss of its catalytic efficiency. In order to compare, the synthesis of 2H-Indazolo[ 2,1-b]phthalazine-1,6,11(13H)-trione derivatives in the presence of catalytic amount of sulfamic acid (SA) under same reaction condition was also reported.

A Characterization of Dedekind Domains and ZPI-rings

Rostami, Esmaeil Department of Mathematics 2017 Kyungpook mathematical journal Vol.57 No.3

It is well known that an integral domain D is a Dedekind domain if and only if D is a Noetherian almost Dedekind domain. In this paper, we show that an integral domain D is a Dedekind domain if and only if D is an almost Dedekind domain such that Max(D) is a Noetherian topological space as a subspace of Spec(D) with respect to the Zariski topology. We also give a new characterization of ZPI-rings.

Proposing a Algorithm for Finding Repetitive Patterns in Web Dataflow

Mohammad Rostami,Somayyeh Ehteshami,Fatemeh Yaghoobi,Farid Saghari,Samaneh Dezhdar 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.7

Today, searching repetitive patterns on data flows is very important. By data flow we mean a type of data which is constantly produced in a very fast and unlimited manner. As a kind of these data we can name the report of clicks in computer networks. A repetitive pattern is a pattern which is available in a significant number of transactions. Finding repetitive patterns in data flows is a new and arguable issue in data mining as data is received in form of fast and continuous flow. Unlike static databases, flow mining faces a lot of problems including single review, requiring unlimited memory and high rate of input data. A common way of searching repetitive patterns is the excess check of data which requires to be saved in memory. In addition, according to the features of data flows i.e. unlimited and fast production, it is not possible to save them in memory and hence techniques are needed which are able to process them online and find repetitive patterns. One of the most popular relative techniques is using sliding windows. It’s advantage is reduction of the consumed memory and increase in search speed. In this paper, a new vertical display and an algorithm based on pins, called DBP-BA, are proposed to find repetitive patters in data flows. Since this new display without any additional task has a compact form, the proposed algorithm has a better performance than similar ones in terms of consumed memory and processing time. On the other hand, experiments support this matter.

On Locally Sierpinski Spaces

M. Rostami KYUNGPOOK UNIVERSITY 1997 Kyungpook mathematical journal Vol.37 No.1

Atopological space is called locally Sierpinski space if every point has a neighbourhood homeomorphic to a Sierpinski space. In this note we discuss some properties of locally Sierpinski spaces, and prove that these spaces are Katetov T_(1/2)spaces. We also consider the product of these spaces and introduce a new space.