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Abolfazl Arabpour,Mohammad Reza Besmi,Pouria Maghouli 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.3
This paper presents an approximated AC model for simultaneous transmission expansion planning (TEP) and reactive power planning by considering wind power investment. Since the full AC-TEP problem is still challenging to solve due to its nonconvexity, a linearized model, by means of special ordered set of type 2, is used to represent the mathematical model of the network. The objective function of our problem is considered to be the annualized investment cost of transmission lines, reactive power resources and wind power plants as well as the operation cost of production of electricity and reactive power resources. Wind and load uncertainties are handled by scenario generation. The K-means clustering technique is employed in order to reduce the number of scenarios. The presented work is applied to the 6-bus Garver’s power system, the 24-bus IEEE RTS and the 118-bus IEEE power system. These three diff erent examples illustrate the characteristics of the method. The results and the provided discussions clearly show the eff ectiveness and robustness as well as the computational effi ciency of the proposed stochastic co-planning framework.
Expression of Chemokines and Chemokine Receptors in Brain Tumor Tissue Derived Cells
Razmkhah, Mahboobeh,Arabpour, Fahimeh,Taghipour, Mousa,Mehrafshan, Ali,Chenari, Nooshafarin,Ghaderi, Abbas Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.17
Chemokine and chemokine receptor expression by tumor cells contributes to tumor growth and angiogenesis and thus these factors may be considered as tumor markers. Here we aimed to characterize cells directly extracted from glioma, meningioma, and secondary brain tumors as well as non-tumoral cells in vitro. Cells were isolated from brain tissues using 0.2% collagenase and characterized by flow cytometry. Expression of SDF-1, CXCR4, CXCR7, RANTES, CCR5, MCP-1 and IP-10 was defined using flow cytometry and qRT-PCR methods. Brain tissue isolated cells were observed as spindle-shaped cell populations. No significant differences were observed for expression of SDF-1, CXCR4, CXCR7, RANTES, CCR5, and IP-10 transcripts. However, the expression of CXCR4 was approximately 13-fold and 110-fold higher than its counterpart, CXCR7, in meningioma and glioma cells, respectively. CXCR7 was not detectable in secondary tumors but CXCR4 was expressed. In non tumoral cells, CXCR7 had 1.3-fold higher mRNA expression than CXCR4. Flow cytometry analyses of RANTES, MCP-1, IP-10, CCR5 and CXCR4 expression showed no significant difference between low and high grade gliomas. Differential expression of CXCR4 and CXCR7 in brain tumors derived cells compared to non-tumoral samples may have crucial impacts on therapeutic interventions targeting the SDF-1/CXCR4/CXCR7 axis.
Mehrdad Naderi,Alireza Arabpour,Tsung-I Lin,Ahad Jamalizadeh 한국통계학회 2017 Journal of the Korean Statistical Society Vol.46 No.3
This paper presents a new extension of nonlinear regression models constructed by assuming the normal mean–variance mixture of Birnbaum–Saunders distribution for the unobserved error terms. A computationally analytical EM-type algorithm is developed for computing maximum likelihood estimates. The observed information matrix is derived for obtaining the asymptotic standard errors of parameter estimates. The practical utility of the methodology is illustrated through both simulated and real data sets.
( Hassan Estakhr ),( Ebrahim Ghiyasi ),( Nilofar Arabpour ) 국제태권도학회 2017 International Symposium for Taekwondo Studies Vol.2017 No.-
Purpose: The purpose of this study was to determine the effect of eight weeks of aerobic training on the pulmonary function of professional Taekwondo players. Methods: The present study is a semi-experimental and practical study. Twenty well-trained male Taekwondo athletes participated in the study. They performed eight weeks (3 times/wk, 30 min/session) of aerobic training on a treadmill with 40-60 percent of the maximum oxygen uptake (VO2 max). Forced expiratory volume in one second (FEV1), forced vital capacity (FVC), and maximum voluntary ventilation (MVV) were measured. Results: The results showed aerobic training had significant effect on forced expiratory volume in one second, forced vital capacity, and maximum voluntary ventilation (p<0.05) of well-trained male Taekwondo athletes from the Fars Province in Iran. Conclusions: These findings indicate that well-trained male Taekwondo athletes will achieve a high level of pulmonary function through aerobic training.