Practical use of computational building information modeling in repairing and maintenance of hospital building- case study

Majid Reza Akhoundan,Kia Khademi,Sam Bahmanoo,Karzan Wakil,Edy Tonnizam Mohamad,Majid Khorami 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.5

Computational Building Information Modeling (BIM) is an intelligent 3D model-based process that provides architecture, engineering, and construction professionals the insight to plan, design, construct, and manage buildings and infrastructure more efficiently. This paper aims at using BIM in Hospitals configurations protection. Infrastructure projects are classified as huge structural projects taking advantage of many resources such as finance, materials, human labor, facilities and time. Immense expenses in infrastructure programs should be allocated to estimating the expected results of these arrangements in domestic economy. Hence, the significance of feasibility studies is inevitable in project construction, in this way the necessity in promoting the strategies and using global contemporary technologies in the process of construction maintenance cannot be neglected. This paper aims at using the building information modeling in covering Imam Khomeini Hospital’s equipment. First, the relationship between hospital constructions maintenance and repairing, using the building information modeling, is demonstrated. Then, using library studies, the effective factors of constructions’ repairing and maintenance were collected. Finally, the possibilities of adding these factors in Revit software, as one of the most applicable software within BIM is investigated and have been identified in some items, where either this software can enter or the software for supporting the repairing and maintenance phase lacks them. The results clearly indicated that the required graphical factors in construction information modeling can be identified and applied successfully.

Practical use of computational building information modeling in repairing and maintenance of hospital building- case study

Akhoundan, Majid Reza,Khademi, Kia,Bahmanoo, Sam,Wakil, Karzan,Mohamad, Edy Tonnizam,Khorami, Majid Techno-Press 2018 Smart Structures and Systems, An International Jou Vol.22 No.5

Computational Building Information Modeling (BIM) is an intelligent 3D model-based process that provides architecture, engineering, and construction professionals the insight to plan, design, construct, and manage buildings and infrastructure more efficiently. This paper aims at using BIM in Hospitals configurations protection. Infrastructure projects are classified as huge structural projects taking advantage of many resources such as finance, materials, human labor, facilities and time. Immense expenses in infrastructure programs should be allocated to estimating the expected results of these arrangements in domestic economy. Hence, the significance of feasibility studies is inevitable in project construction, in this way the necessity in promoting the strategies and using global contemporary technologies in the process of construction maintenance cannot be neglected. This paper aims at using the building information modeling in covering Imam Khomeini Hospital's equipment. First, the relationship between hospital constructions maintenance and repairing, using the building information modeling, is demonstrated. Then, using library studies, the effective factors of constructions' repairing and maintenance were collected. Finally, the possibilities of adding these factors in Revit software, as one of the most applicable software within BIM is investigated and have been identified in some items, where either this software can enter or the software for supporting the repairing and maintenance phase lacks them. The results clearly indicated that the required graphical factors in construction information modeling can be identified and applied successfully.

STRONG INSERTION OF A CONTRA-BAIRE-1 (BAIRE-.5) FUNCTION BETWEEN TWO COMPARABLE REAL-VALUED FUNCTIONS

Majid Mirmiran,Binesh Naderi 한국수학교육학회 2019 純粹 및 應用數學 Vol.26 No.1

Necessary and sufficient conditions in terms of lower cut sets are given for the strong insertion of a Baire-.5 function between two comparable real-valued functions on the topological spaces that Fσ−kernel of sets are Fσ−sets.

Effect of Magnetic Field on Transient Natural Convection Heat Transfer

Majid Ghassemi,Mohsen Pirmohammadi,Ghanbar ali Sheikhzadeh 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

Characterization of the Growth, Total Lipid and Fatty Acid Profiles in Microalga, Nannochloropsis oceanica under Different Nitrogen Sources

Majid Mahdieh,Salimeh Shabani,Mohammad Reza Amirjani 한국미생물·생명공학회 2019 한국미생물·생명공학회지 Vol.47 No.1

The properties of microalgae as bioresources for biodiesel production can be improved by adding nitrogen sources into the culture medium. Thus, Nannochloropsis oceanica CCAP 849/10 was cultured in f/2 media supplemented with five different forms of nitrogen at 0.88 mmol-N l-1 each: ammonium bicarbonate (NH4HCO3), ammonium sulfate ((NH4)2SO4), sodium nitrate (NaNO3), ammonium nitrate (NH4NO3), and urea. The cell density, lipid content, and fatty acid profile of the microalga were determined after 15 days of cultivation. The growth of N. oceanica based on cell number was lowest in the medium with NH4NO3, and increased significantly in the medium with NH4HCO3. Cells treated with (NH4)2SO4, and NH4NO3 produced the highest total lipid contents (i.e., 65% and 62% by dry weight, respectively). The fatty acid profiles of the microalga were significantly different in the various nitrogen sources. The major fatty acids detected in cultures supplemented with NH4HCO3, (NH4)2SO4, NH4NO3, or urea were C14:0, C16:0, C16:1, C18:0, C18:1, C18:2, C20:5, and C22:6. However, the C16:1 content in the NaNO3-supplemented culture was very low. This study highlights that the nitrogen source can strongly influence lipid production in N. oceanica and its fatty acid composition.

A comparison of the magnetic and microwave absorption properties of MneSneTi substituted strontium ferrite with and without multiwalled carbon nanotube

Majid Jamalian,Ali Ghasemi,Ebrahim Paimozd 한국물리학회 2014 Current Applied Physics Vol.14 No.7

In this work, a comparison of magnetic and microwave properties between MneSneTi substituted SrM ferrite and nanocomposite of MneSneTi substituted SrM ferritee20% volume multi-walled carbon nanotube (MWCNT) has been done. Phase characterization and crystal structure of the synthesized nanoparticles were tested by X-ray diffraction (XRD). Field emission scanning electron microscopy (FESEM), Fourier transform infrared spectrometry (FTIR) analysis approved that the SrFe12 x(MnSn0.5Ti0.5)x/2O19 nanoparticles were attached on the external surfaces of the MWCNTs. Mӧssbauer spectroscopy (MS) showed the occupancy by non-magnetic Mn2þ eSn4þ eTi4þ cations into the hexagonal lattice structure. Magnetic properties were evaluated by a vibrating sample magnetometer (VSM). The results also indicated that saturation magnetization and coercivity were decreased with an increase in x content and also MWCNTs addition. Microwave absorption properties were investigated by a vector network analyzer (VNA). It was found that with an addition of 20 volume percentage of MWCNTs, the saturation magnetization coupled with coercivity decrease, but reflection loss (RL) increase broadly. Also it proved that with an increase in the thickness of absorption the frequency band shifts from Ku (12 e18 GHz) to X (8e12 GHz) band.

An Efficient and Environmentally Friendly Procedure for the Synthesis of Some Novel 8-Benzylidene-4-phenyl-3,4,5,6,7,8-hexahydro-1H-quinazolin-2-ones/thiones using Tetrabutylammonium Hexatungstate as a Reusable Heterogeneous Catalyst under Solvent-Free C

Majid Ghashang,Syed Sheik Mansoor,Krishnamoorthy Aswin 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.11

An efficient method for the preparation of 8-benzylidene-4-phenyl-3,4,5,6,7,8-hexahydro-1H-quinazolin-2- ones/thiones from the reaction of aromatic aldehydes with cyclohexanone and urea or thiourea in the presence of Tetrabutylammonium hexatungstate, [TBA]2[W6O19], as an efficient, inexpensive catalyst under thermal and solvent-free conditions has been developed. Good yields, short reaction times, straightforward workup, reusability of the catalyst, and green conditions are the most obvious advantages of this procedure.

Effect of Foreign Direct Investment on Economic Growth of Pakistan: The ARDL Approach

Majid Jehangir,Sunhae Lee,Sae Woon Park 사람과세계경영학회 2020 Global Business and Finance Review Vol.25 No.2

Purpose: This study investigates the effect of foreign direct investment on the economic growth of Pakistan. It also explores the role and contribution of various variables in the growth of the country’s economy. Design/methodology/approach: This study examines both the long run and the short run relationship between the variables over the period 1974 - 2018 by the Auto-Regressive Distributed Lag approach. Findings: We find that in the long run, FDI, gross fixed capital formation and labor force participation have positive effect on the economic growth, whereas military expenditures have negative effect. In the short run model, however, gross fixed capital formation was indicative of having a significantly negative relationship with the economic growth while variables such as FDI, military expenditures and labor force participation were found to have positive impact. Inflation turned out to be significant but negative in both of the models while final consumption expenditure showed insignificance in both of the models. Research limitations/implications: Notwithstanding its contribution to the literature, this study has limitations as well. Apart from those measures adopted in this research, there are also other important measures necessary for a country’s economic growth such as skilled labor, work environment, infrastructure, security, technology, and so on. Yet, due to the lack or unavailability of reliable data source, we have not included these valuables in our research. If incorporated in the analysis, these measures may provide more accurate results. Pakistan is a country where military engages in various business activities such as operating department stores, military schools, universities, and hospitals and as well as constructing roads and buildings. Thus such services and contributions of the military, if studied thoroughly, may provide better statistics regarding inward FDI and its contribution towards economic growth of the country. As a policy implication, this study suggests that the Pakistani government should focus on the necessary reforms to attract more FDI, since a low-capital country like Pakistan cannot underestimate the significance of FDI for a sustainable growth. Further researches may be conducted with a focus on the growth-investment possibilities of China Pakistan Economic Corridor. Studies can also be conducted which incorporate agricultural sectors, public and private investments, trust (between land/firm owners and labor) and the existing work/business environment in order to investigate the determinants of economic development of the country. Originality/Value: To the best of our knowledge, there is only one study by Nilofer & Qayyum (2018) that uses the ARDL model to investigate the impact of FDI on economic growth of Pakistan. While they analyzed the variables including GDP, government consumption expenditure, public investment, FDI and lending rate, our study involves military expenditure, labor force participation, final consumption expenditure, gross fixed capital formation, inflation, and FDI. Also, we investigate the role of FDI on economic growth of Pakistan for a different time period 1974 to 2018 as compared to their study over the period 1970 - 2015.

Role of post-tensioned coconut-fibre ropes in mortar-free interlocking concrete construction during seismic loadings

Majid Ali 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.4

This paper mainly presents the experimental work on studying the effect of post-tensioned coconut-fibre ropes in controlling upliftsof interlocking blocks in mortar-free concrete construction during seismic loadings. Interlocking blocks are capable of returning backto their original positions after the ground motion because of provided inclined key between the blocks. Coconut fibre reinforcedconcrete was used to make interlocking blocks. To simulate a single degree-of-freedom system, a mass of 200 kg is attached at thecolumn top. The seismic response of structure is measured in terms of induced accelerations, block uplift, top relative displacementand rope tension. Generally, induced acceleration is increased up to the column mid-height and then decreased a little bit at thecolumn top. The trends of block uplift and rope tension are somewhat similar i.e. non-linear with respect to the applied incrementalseismic loadings. Empirical relations, as a function of peak ground acceleration, are also developed from the experimental results toenvisage the structure seismic response. There is a percentage difference up to 35% in predicting the structure response which can beattributed towards the complicated nature of the structure versus the simple approach developed. But still, this can help inunderstanding the behaviour of mortar-free interlocking structure having post-tensioned coconut-fibre rope in a systematic manner.

CFD simulation of fluid flow in a novel prototype radial mixed plug-flow reactor

Majid Rasouli,Seyyed Mohammad Mousavi,Hamidreza Azargoshasb,Oveis Jamialahmadi,Yahya Ajabshirchi 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.64 No.-

This research describes a simulation based on three dimensional computational fluid dynamics (CFD) in a semi-continuous PFR reactor. The commercial software FLUENT 6.3 was employed to solve the governing equations. The gas-liquid flow was modeled using an Eulerian multiphase and k–ε turbulence (RNG) model. Hydrodynamics investigated for different total solid (TS) levels and mixing regime using multiple reference frame (MRF) model within the whole multiphase bioreactor. The simulation results in a prototype reactor are validated against the experimental data. Simulation results indicate that flow pattern within the reactor was highly influenced by the substrate density and viscosity, and stirring intensity. Moreover, substrate density and viscosity are variable according to the TS content. The results demonstrate adequate mixing process providing the required amount and intensity of mixing for uniform distribution of reactor content and needed conditions to improve the reactor performance. Comparison of three impeller mixing speed in a reactor demonstrates that mixing intensity has affected the gas phase above the fluid surface. Such a mixing intensity may create a turbulent region with a homogenous mixture of gas and liquid, which is not suitable for this anaerobic digestion.