A new optimized performance-based methodology for seismic collapse capacity assessment of moment resisting frames

Mohammad M. Maddah,Sassan Eshghi,Alireza Garakaninezhad 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.82 No.5

Moment-resisting frames (MRFs) are among the most conventional steel structures for mid-rise buildings in many earthquake-prone cities. Here, a simplified performance-based methodology is proposed for the seismic collapse capacity assessment of these buildings. This method employs a novel multi-mode pushover analysis to determine the engineering demand parameters (EDPs) of the regular steel MRFs up to the collapse prevention (CP) performance level. The modal combination coefficients used in the proposed pushover analysis, are obtained from two metaheuristic optimization algorithms and a fitting procedure. The design variables for the optimization process are the inter-story drift ratio profiles resulting from the multi-mode pushover analyses, and the objective values are the outcomes of the incremental dynamic analysis (IDA). Here, the collapse capacity of the structures is assessed in three to five steps, using a modified IDA procedure. A series of regular mid-rise steel MRFs are selected and analyzed to calculate the modal combination coefficients and to validate the proposed approach. The new methodology is verified against the current existing approaches. This comparison shows that the suggested method more accurately evaluates the EDPs and the collapse capacity of the regular MRFs in a robust and easy to implement way.

Dynamic enhancement of interleaved step-up/step-down DC-DC converters using passive damping networks

Geetha, E.,Maddah, M.,Mansouri Khosravi, M.,Kokabi, A.,Samavatian, V. The Korean Institute of Power Electronics 2020 JOURNAL OF POWER ELECTRONICS Vol.20 No.3

In this paper, a passive damping network between two stages of a cascaded DC-DC boost/buck interleaved converter was proposed to enhance the dynamic behavior. By this damping network, the right-half plane zeros in converter's transfer function are sufficiently departed from the left half-plane, which leads to more damped transient behavior. A frequency analysis illustrated the dynamic enhancement in the proposed converter. To validate the theoretical model under different related circumstances, experimental results are presented through implementing a prototype setup.

Religion as an Alleviating Factor in Iranian Cancer Patients: a Qualitative Study

Rahnama, Mozhgan,Khoshknab, Masoud Fallahi,Maddah, Sadat Seyed Bagher,Ahmadi, Fazlollah,Arbabisarjou, Azizollah Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.18

After diagnosis of cancer, many patients show more inclination towards religion and religious activities. This qualitative study using semi-structured interviews explored the perspectives and experiences of 17 Iranian cancer patients and their families regarding the role of religion in their adaptation to cancer in one of the hospitals in Tehran and a charity institute. The content analysis identified two themes: "religious beliefs" (illness as God's will, being cured by God's will, belief in God's supportiveness, having faith in God as a relieving factor, and hope in divine healing) and "relationship with God during the illness." In general, relationship with God and religious beliefs had a positive effect on the patients adapting to their condition, without negative consequences such as stopping their treatment process and just waiting to be cured by God. Thus a strengthening of such beliefs, as a coping factor, could be recommended through religious counseling.

Physical structure, TD-DFT computations, and optical properties of hybrid nanocomposite thin film as optoelectronic devices

M.Sh. Zoromba,H.A. Maddah,M.H. Abdel-Aziz,Ahmed F. Al-Hossainy 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-

HCl doped-copolymer of ortho phenylene diamine and meta phenylene diamine was prepared by usingoxidative polymerization method with ferric chloride as an oxidizing agent in the existence of sodiumdedocyl sulphate as a soft template. The microporous structure thin films of hybrid copolymer/ZrO2nanocomposite [copolymer/ZrO2]NC were fabricated using a physical vapor deposition (PVD) method. The effect of addition of zirconium oxide nanoparticles [ZrO2]NPs on the physical properties of the copolymerwas discussed in the light of crystallinity and optical properties. The average crystallite size of[ZrO2]NPs is around 40 nm. The copolymer showed an absorbance of 1.18 at the wavelength (k)374 nm, which increased to 1.26 at k = 440 nm after glycine addition, also increased to 1.53 at k = 486nm after [ZrO2]NPs loading. Also, the significant changes in the absorption index and indirect/direct bandgapof the copolymer have been detected. The materials Studio 7.0 program on TDDFT/DMol3 was used tooptimize the molecular structure and perform the frequency calculations for the crystal models and isolatedmolecules. The DFT-Gaussian09W-vibration values are quite similar to the experimental data eitherin the structure or in the optical properties. The improvements in optical properties were achieved andrevealed the possibility of using the hybrid nanocomposite films in the polymers solar cell application.

Family Adaptation to Stroke: A Metasynthesis of Qualitative Research based on Double ABCX Model

Ali Hesamzadeh,Asghar Dalvandi,Sadat Bagher Maddah,Masoud Fallahi Khoshknab,Fazlollah Ahmadi 한국간호과학회 2015 Asian Nursing Research Vol.9 No.3

Purpose: There is growing interest in synthesizing qualitative research. Stroke is a very common cause of disability often leaving stroke survivors dependent on their family. This study reports an interpretive review of research into subjective experience of families with stroke survivors based on the components of the Double ABCX Model including stressors, resources, perception, coping strategies, and adaptation of these families. Methods: Metasynthesis was applied to review qualitative research looking at stroke family members' experiences and responses to having a stroke survivor as a family member. Electronic database from 1990 to 2013 were searched and 18 separate studies were identified. Each study was evaluated using methodological criteria to provide a context for interpretation of substantive findings. Principal findings were extracted and synthesized under the Double ABCX Model elements. Results: Loss of independence and uncertainty (as stressors), struggling with new phase of life (as perception), refocusing time and energy on elements of recovery process (as coping strategy), combined resources including personal, internal and external family support (as resources), and striking a balance (as adaptation) were identified as main categories. Family members of stroke survivor respond cognitively and practically and attempt to keep a balance between survivor's and their own everyday lives. Conclusions: The results of the study are in conformity with the tenets of the Double ABCX Model. Family adaptation is a dynamic process and the present study findings provide rich information on proper assessment and intervention to the practitioners working with families of stroke survivors.

Experimental and mathematical analysis of electroformed rotating cone electrode

Hamid Heydari,Salman Ahmadipouya,Amirhossein Shoaee Maddah,Mohammad-Reza Rokhforouz 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.4

In this study, we present results of a mathematical model in which the governing equations of electroforming process were solved using a robust finite element solver (COMSOL Multiphysics). The effects of different parameters including applied current density, solution electrical conductivity, electrode spacing, and anode height on the copper electroforming process have been investigated. An electroforming experiment using copper electroforming cell was conducted to verify the developed model. The obtained results show that by increasing the applied current density, the electroforming process takes place faster, thereby resulting in a higher thickness of the electroformed layer. In addition, higher applied current density led to non-uniformity of the coated layer. It was revealed that by increasing electrolytic conductivity from 5 to 20 S/m, the electroformed layer became thicker. By considering three different anode heights, it was found that if the cathode and anode are the same height, the process will be more effective. Finally, it was concluded that there is an optimum value of anode-cathode spacing: above it, energy consumption and plating time are high; while below it, the resultant layer is non-uniform. The present study demonstrates that the developed model can accurately capture the physics of electroforming with a reasonable computational time.

Efficacy of High Dose Radiotherapy in Post-operative Treatment of Glioblastoma Multiform - A Single Institution Report

Pashaki, Abdolazim Sedighi,Hamed, Ehsan Akbari,Mohamadian, Kamal,Abassi, Mohammad,Safaei, Afsane Maddah,Torkaman, Tayebe Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.6

Background: Glioblastoma multiform (GBM) is a highly aggressive tumor with median survival of approximately 14 months. Management consists of maximal surgical resection followed by post-operative chemoradiation with concurrent then adjuvant temozolamide. The standard radiotherapy dose is 60Gy in 2-Gy fractions recommended by the radiation therapy oncology group (RTOG). With the vast majority of tumor recurrences occurring within the previous irradiation field and the poor outcome associated with standard therapy, regimens designed to deliver higher radiation doses to improve local control and enhance survival are needed. In this study, we report a single institutional experience in treatment of 68 consecutive patients with GBM, treated with resection, and given post-operative radiotherapy followed by concurrent and/or adjuvant chemotherapy. Results: Of the 80 patients who entered this study, 68 completed the treatment course; 45 (66.2%) males and 23 (33.8%) females with a mean age at diagnosis of $49.0{\pm}12.9$ (21-75) years. At a median follow up of 19 months, 39 (57.3%) patients had evidence of tumor progression and 36 (52.9%) had died. The median over all survival for all patients was 16 months and progression free survival for all patients was 6.02 months. All potential prognostic factors were analyzed to evaluate their effects on overall survival. Age ${\leq}50$ year, concurrent and adjuvant chemotherapy and extent of surgery had significant p values. We found lower progression rate among patients who received higher doses of radiotherapy (>60Gy). Higher radiation doses improved progression free survival (p=0.03). Despite increasing overall survival, this elevation was not significant. Conclusions: This study emphasize that higher radiation doses of (>60Gy) can improve local control and potentially survival, so we strongly advise prospective multi centric studies to evaluate the role of higher doses of radiotherapy on GBM patient outcome.