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Institution

Indian Institute of Technology Guwahati

EducationGuwahati, Assam, India
About: Indian Institute of Technology Guwahati is a education organization based out in Guwahati, Assam, India. It is known for research contribution in the topics: Adsorption & Catalysis. The organization has 6933 authors who have published 17102 publications receiving 257351 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, fly ashes were collected from 14 thermal power stations located in different parts of India and were characterized using simple tests like fineness modulus, specific gravity, Rigden voids, German filler test and methylene blue value test, and advanced tests like X-ray diffractometer, scanning electron microscope, and chemical analysis.
Abstract: Fly ashes were collected from 14 thermal power stations located in different parts of India and were characterized using simple tests like fineness modulus, specific gravity, Rigden voids, German filler test and methylene blue value test, and advanced tests like X-ray diffractometer, scanning electron microscope, and chemical analysis. These fly ashes were divided into four groups based on the above tests and then used as filler in bituminous concrete (BC) mixes. The stone dust, a conventional filler in India, was also used for comparing the results. Rheological properties of filler-bitumen (F/B) mastic prepared at different F/B ratios were determined from softening point test, viscosity test, and dynamic shear rheometer test. Strength and durability tests like Marshall stability, retained stability, tensile strength ratio, and static creep tests were conducted on BC mixes with five types of fillers and the results are analyzed and compared. The study indicated that all the four groups of fly ashes are suitable for use in BC mixes with fly ashes in group 4 having the best performance. The optimum filler content is 7% and properties of fly ash BC mixes are better than those of conventional mix.

72 citations

Journal ArticleDOI
TL;DR: The performance of a laboratory-scale plate and frame-type electrochemical ion-exchange (EIX) cell on removal of hexavalent chromium from synthetic wastewater containing 5 mg/l of Cr(VI) was evaluated under varying applied voltages.
Abstract: In the present investigation, the performance of a laboratory-scale plate and frame-type electrochemical ion-exchange (EIX) cell on removal of hexavalent chromium from synthetic wastewater containing 5 mg/l of Cr(VI) was evaluated under varying applied voltages. Ruthenium dioxide-coated titanium plate (RuO 2/Ti) was used as anode and stainless steel plates as cathode. The EIX cell was run at different hydraulic retention time (HRT). Before using in the electrochemical cell, the capacity of ion-exchange resin was evaluated through kinetic and isotherm equilibrium tests in batch mode. The batch kinetic study result showed that the equilibrium time for effective ion exchange with resin is 2 h. The isotherm equilibrium data fit well to both Freundlich and Langmuir isotherms. Maximum capacity (qm) of resin calculated from Langmuir isotherm was 71.42 mg/g. Up to 99% of chromium removal was noticed in the EIX cell containing fresh resin at applied voltages of 10 V and higher. Migration of chromium ion to anode c...

72 citations

Journal ArticleDOI
TL;DR: In this paper, an identification algorithm for the estimation of dynamic parameters of active magnetic bearing (AMB) and rotor residual unbalances has been presented for a flexible rotor system, which is suitable for the state of the art rotors that are fully levitated on AMBs.

72 citations

Journal ArticleDOI
TL;DR: The VLRs and non-VLRs are used independently during training and testing of a speaker verification (SV) system to reduce gross level mismatch due to sound units and achieve better compensation of degradation effects by applying different normalization to these two different energy regions.
Abstract: This work proposes methods for detecting vowel-like regions (VLRs) and non-vowel-like regions (non-VLRs) using excitation source information. The VLR onset and end points are hypothesized and used in an iterative algorithm for detecting the VLRs. Next, for detection of non-VLRs, the linear prediction (LP) residual samples in the VLRs are attenuated significantly to indirectly emphasize the residual samples in the non-VLRs. The modified LP residual samples excite the time varying all pole filter to reconstruct non-VLRs enhanced speech and used for detecting non-VLRs. The VLRs and non-VLRs are used independently during training and testing of a speaker verification (SV) system to reduce gross level mismatch due to sound units and achieve better compensation of degradation effects by applying different normalization to these two different energy regions. Finally, the scores are combined with higher weight on VLRs, which are more speaker specific. Experiments verify that the proposed approach provides improved performance for clean and degraded speech. On the NIST-2003 speaker recognition database, using VLRs and non-VLRs improves the equal error rate from 6.63% to 6% and from 2.29% to 1.89% for a GMM-UBM based and an i-vector based SV system, respectively.

72 citations

Journal ArticleDOI
TL;DR: Mechanistic synergy between sonication and biodesulfurization is revealed to be of both physical and chemical nature.

72 citations


Authors

Showing all 7128 results

NameH-indexPapersCitations
Jasvinder A. Singh1762382223370
Dipanwita Dutta1431651103866
Sanjay Gupta9990235039
Santosh Kumar80119629391
Subrata Ghosh7884132147
Rishi Raj7856922423
B. Bhuyan7365821275
Ravi Shankar6667219326
Ashutosh Sharma6657016100
Gautam Biswas6372116146
Sam P. de Visser6225613820
Surendra Nadh Somala6114428273
Manish Kumar61142521762
Mihir Kumar Purkait572679812
Ajaikumar B. Kunnumakkara5720120025
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023118
2022365
20212,032
20201,947
20191,866
20181,647