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Direct Displacement Based Seismic Design of RC Frame Structure
Mrinmoy Kirtania,Probhakar Chakravorty ASCONS 2018 INTERNATIONAL JOURNAL OF EMERGING MULTIDISCIPLINAR Vol.2 No.1
In this paper we direct a seismic design of a Reinforce concrete frame building under displacement based design. There is a problem with force based design that we can’t find a clear relation between forces & cracking, that was drift or displacement is directly related with damage. By this simple design method we consider drift as parameter and can easily design this with given performance level under-code drift limit. In this paper determine maximum deviation from target drift& justified it code limit. The approach of our design methodology satisfactorily achieves by inelastic time history analysis as well as push over analysis. In this simple design we get a very successful and a clear predictable seismic response.
Mrinmoy Karmakar,Manas Mahapatra,Nayan Ranjan Singha 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.5
Response surface methodology (RSM) optimized, semi efficiently vulcanized (SEV) and filled organophilic composite natural rubber (NR) membranes of varying physichochemical interactions were reported for sorption-diffusion- permeation based separation of tetrahydrofuran (THF) from binary aqueous mixtures. RSM was used to obtain optimum accelerator/sulfur (A/S) ratio required for crosslinking of nine membranes to find excellent balance of mechanical properties. These membranes were characterized by FESEM, AFM, EDX, XRD, DTG, TGA, DSC and FTIR. Vulcanized products formed from several crosslinking precursors of NR via radical and/or ionic paths were incorporated to impart an unambiguous reaction mechanism. RSM was also used to obtain optimum conditions (temperature/ concentration/filler) for total flux (TF) and separation factor (SF). Membrane intrinsic properties, like partial permeabilities (PPs), selectivities and diffusion coefficients (DCs) were also studied. NRSEV12 membrane showed excellent balance of TF (24.01±0.7 g m−2 h−1) and SF (118.8±4.16) at 0.97 wt% of THF in feed and 35 oC.
Insights into phytase-containing transgenic Lemna minor (L.) as a novel feed additive
Ghosh, Mrinmoy,Sharma, Neelesh,Gera, Meeta,Kim, Nameun,Huynh, Do,Zhang, Jiaojiao,Min, Taesun,Sodhi, Simrinder Singh,Kim, Min Bae,Rekha, V. P. B.,Ko, Sukmin,Jeong, Dong Kee Springer-Verlag 2018 Transgenic research Vol.27 No.2
Dr. Mrinmoy Majumder,Shirsendu Das,Tilottama Chakraborty 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.5
In 21th centaury energy has become a prime need of the civilization. One of the most important types of energy is the electrical energy, which is very much essential for both domestic & industrial purposes. In present century, more than 60% of the total electric energy is producing from coals, 14-17% of energy is producing from Renewable sources & the remaining part is from natural gases. So, it is clear that maximum sources (more than 80%) of energy are causes pollution. Pollution & Global warming are the main reason of rapid environmental misbalancing. In case of our state (Tripura) this energy generation figures or records are not impressive, approximately 1% of total energy is producing from hydro-power & the rest percentages are from gas-thermal plants. It is observed that the year round insufficiencies of river water & irregular rainfall in hilly river sub-basin areas are the main reasons of decrement in hydro-power generation. So, in present scenario, the concept of Pump-Storage Hydro-Power station is very much appropriate, because this type of plant can recycle fix storage of water. That’s why insufficiency of river water will not affect the generation like conventional hydro power station. In this work Multi Criteria Decision Making Algorithm (MCDMA) is used to find the best alternative with respect to the design consideration to select a best location in this state to set pump storage plant, the suitable location has been selected by both MCDM (AHP) & cost effective analysis. This work tried to give some key point regarding the problems, mitigations & future scope of Gomati Hydro Power Project by integrated studies on Dumbur Lake, river sub-basin, average annual rainfall & annual mean depth of the river. At the end the project implies a probability of more than 11 MW Hydro-power generations by installing Mini-Hydro Pump storage plant in this state Tripura using the water of River Gomati. Finally plant network has been optimized by Flex-Sim software, to check the efficiencies of different component under the assigned/ proposed conditions.
Eco-friendly method of fabricating indium-tin-oxide thin films using pure aqueous sol-gel
Misra, Mrinmoy,Hwang, Deuk-Kyu,Kim, Yoon Cheol,Myoung, Jae-Min,Lee, Tae Il Elsevier 2018 CERAMICS INTERNATIONAL Vol.44 No.3
<P><B>Abstract</B></P> <P>An indium-tin-oxide (ITO) thin film with approximately 50 nm thickness was successfully synthesized on glass substrates by using a fully aqueous sol-gel process. The sol was prepared from indium nitrate hydrate and tin fluoride as a precursor. Thermogravimetric analysis confirmed that the sol converted into crystalline ITO at 286 °C. The optical band gap and transmittance of the thin film were observed to increase with annealing temperature and plasma treatment time. X-ray photoelectron spectroscopy and transmittance studies established that the number of oxygen vacancies in the thin film drastically increased with increasing temperature and plasma treatment. The annealing temperature and argon plasma treatment time appear to be key factors in reducing resistivity and increasing the transmittance of the thin film. A considerable decrease in the resistivity of the ITO thin film was observed after Ar plasma treatment. This eco-friendly sol-gel ITO thin film may find potential applications in n-type ohmic electrodes for ink-jet printable electronics.</P>
Raj Kumar Mongre,Simrinder Singh Sodhi,Mrinmoy Ghosh,Jeong Hyun Kim,Nameun Kim,Neelesh Sharma,Dong Kee Jeong 한국발생생물학회 2014 발생과 생식 Vol.18 No.4
Osteosarcoma (OS) is one of the most common malignant primary bone tumors and NF-κB appears to play a causative role, but the mechanisms are poorly understood. OS is one of the pleomorphic, highly metastasized and invasive neoplasm which is capable to generate osteoid, osteoclast and osteoblast matrix. Its high incidence has been reported in adolescent and children. Cell signal cascade is the pivotal functional mechanism acquired during the differentiation, proliferation, growth and survival of the cells in neoplasm including OS. The major limitation to the success of chemotherapy in OS is the development of multidrug resistance (MDR). Answers to all such queries might come from the knock-in experiments in which the combined approach of miRNAs with NF-κB pathway is put into use. Abnormal miRNAs can modulate several epigenetical switching as a hallmark of number of diseases via different cell signaling. Studies on miRNAs have opened up the new avenues for both the diagnosis and treatment of cancers including OS. Collectively, through the present study an attempt has been made to establish a new systematic approach for the investigation of microRNAs, biophysiological factors and their target pairs with NF-κB to ameliorate oncogenesis with the “bridge between miRNAs and NF- κB”. The application of NF-κB inhibitors in combination with miRNAs is expected to result in a more efficient killing of the cancer stem cells and a slower or less likely recurrence of cancer.
Manas Mahapatra,Mrinmoy Karmakar,Arnab Dutta,Nayan Ranjan Singha 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.9
Response surface methodology (RSM) optimized accelerator-to-sulfur (A/S) ratio was used to synthesize semi efficiently vulcanized styrene butadiene rubber (SBRSEV0) membrane possessing optimum balance between tensile strength (TS) and elongation at break (EAB). In addition, composite membranes, such as SBRSEV8, SBRSEV12 and SBRSEV24, were fabricated via incorporating 8, 12 and 24 wt% carbon black filler (CBF), respectively. The changes in physicochemical properties, as a result of crosslinking and CBF loading, were determined by analyzing CP MAS 13CNMR, FTIR, TGA, DSC, XRD, FESEM-EDX and crosslink densities. Several bi-/poly-sulfidic products, formed by crosslinking precursors of SBR in accelerated sulfur vulcanization, were examined to ascertain the unambiguous reaction mechanism. In this regard, an extensive density functional theory (DFT) based optimization was conducted to apprehend the relative variation in stabilities of several mono-/poly-crosslinked configurations by measuring dipole moments and ground state energies. Moreover, intrinsic membrane properties, such as partial permeabilities and diffusion coefficients, were measured at varying conditions. RSM was employed to optimize membrane efficiency resulting from individual and/or interactive effects of input variables. For the first time, systematic three-stage RSM based optimization (i.e., TS/EAB, total flux (TF)/separation factor (SF) and partial permeabilities) was used to ensure excellent balance between TS/EAB (5.78MPa/499.008% at 2.32 and 3.29 wt% of A and S, respectively), minimum TF/maximum SF (36.90 g m-2 h-1/202.46 at 35 oC, 0.97 wt% tetrahydrofuran (THF) and 24 wt% CBF) and minimum/maximum partial permeabilities of water/THF (2.94×10-8/4.64×10-8 Barrer at 35 oC, 0.97 wt% THF and 11.49 wt% CBF).