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55. University of Glasgow at ImageCLEFPhoto 2009: Optimising Similarity and Diversity in Image Retrieval

Author

Leelanupab, Teerapong, Zuccon, Guido, Goyal, Anuj, Halvey, Martin, Punitha, P., Jose, Joemon M., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Peters, Carol, editor, Caputo, Barbara, editor, Gonzalo, Julio, editor, Jones, Gareth J. F., editor, Kalpathy-Cramer, Jayashree, editor, Müller, Henning, editor, and Tsikrika, Theodora, editor

Published
2010
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56. Feature Subspace Selection for Efficient Video Retrieval

Author

Goyal, Anuj, Ren, Reede, Jose, Joemon M., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Boll, Susanne, editor, Tian, Qi, editor, Zhang, Lei, editor, Zhang, Zili, editor, and Chen, Yi-Ping Phoebe, editor

Published
2010
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57. TV News Story Segmentation Based on Semantic Coherence and Content Similarity

Author

Misra, Hemant, Hopfgartner, Frank, Goyal, Anuj, Punitha, P., Jose, Joemon M., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Boll, Susanne, editor, Tian, Qi, editor, Zhang, Lei, editor, Zhang, Zili, editor, and Chen, Yi-Ping Phoebe, editor

Published
2010
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58. Diversity, Assortment, Dissimilarity, Variety: A Study of Diversity Measures Using Low Level Features for Video Retrieval

Author

Halvey, Martin, Punitha, P., Hannah, David, Villa, Robert, Hopfgartner, Frank, Goyal, Anuj, Jose, Joemon M., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Boughanem, Mohand, editor, Berrut, Catherine, editor, Mothe, Josiane, editor, and Soule-Dupuy, Chantal, editor

Published
2009
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59. Split and Merge Based Story Segmentation in News Videos

Author

Goyal, Anuj, Punitha, P., Hopfgartner, Frank, Jose, Joemon M., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Boughanem, Mohand, editor, Berrut, Catherine, editor, Mothe, Josiane, editor, and Soule-Dupuy, Chantal, editor

Published
2009
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63. A data fusion approach to optimize compositional stability of halide perovskites

Author

Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Research Laboratory of Electronics, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory, Sun, Shijing, Tiihonen, Armi, Oviedo, Felipe, Liu, Zhe, Thapa, Janak, Zhao, Yicheng, Hartono, Noor Titan P, Goyal, Anuj, Heumueller, Thomas, Batali, Clio, Encinas, Alex, Yoo, Jason J, Li, Ruipeng, Ren, Zekun, Peters, I Marius, Brabec, Christoph J, Bawendi, Moungi G, Stevanovic, Vladan, Fisher, John, Buonassisi, Tonio, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Research Laboratory of Electronics, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory, Sun, Shijing, Tiihonen, Armi, Oviedo, Felipe, Liu, Zhe, Thapa, Janak, Zhao, Yicheng, Hartono, Noor Titan P, Goyal, Anuj, Heumueller, Thomas, Batali, Clio, Encinas, Alex, Yoo, Jason J, Li, Ruipeng, Ren, Zekun, Peters, I Marius, Brabec, Christoph J, Bawendi, Moungi G, Stevanovic, Vladan, Fisher, John, and Buonassisi, Tonio

Abstract

Search for resource-efficient materials in vast compositional spaces is an outstanding challenge in creating environmentally stable perovskite semiconductors. We demonstrate a physics-constrained sequential learning framework to subsequently identify the most stable alloyed organic-inorganic perovskites. We fuse data from high-throughput degradation tests and first-principle calculations of phase thermodynamics into an end-to-end Bayesian optimization algorithm using probabilistic constraints. By sampling just 1.8% of the discretized Cs MA FA PbI (MA, methylammonium; FA, formamidinium) compositional space, perovskites centered at Cs MA FA PbI show minimal optical change under increased temperature, moisture, and illumination with >17-fold stability improvement over MAPbI . The thin films have 3-fold improved stability compared with state-of-the-art multi-halide Cs (MA FA ) Pb(I Br ) , translating into enhanced solar cell stability without compromising conversion efficiency. Synchrotron-based X-ray scattering validates the suppression of chemical decomposition and minority phase formation achieved using fewer elements and a maximum of 8% MA. We anticipate that this data fusion approach can be extended to guide materials discovery for a wide range of multinary systems. Despite recent intensive efforts to improve the environmental stability of halide perovskite materials for energy harvesting and conversion, traditional trial-and-error explorations face bottlenecks in the navigation of vast chemical and compositional spaces. We develop a closed-loop optimization framework that seamlessly marries data from first-principle calculations and high-throughput experimentation into a single machine learning algorithm. This framework enables us to achieve rapid optimization of compositional stability for Cs MA FA PbI perovskites while taking the human out of the decision-making loop. We envision that this data fusion approach is generalizable to directly tackle challenges in de

Published
2022

70. Formation of 6H-Ba3Ce0.75Mn2.25O9 during Thermochemical Reduction of 12R-Ba4CeMn3O12: Identification of a Polytype in the Ba(Ce,Mn)O3 Family

Author

Strange, Nicholas A., primary, Park, James Eujin, additional, Goyal, Anuj, additional, Bell, Robert T., additional, Trindell, Jamie A., additional, Sugar, Joshua D., additional, Stone, Kevin H., additional, Coker, Eric N., additional, Lany, Stephan, additional, Shulda, Sarah, additional, and Ginley, David S., additional

Published
2022
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74. Investigating the Electronic Structure of Prospective Water-splitting Oxide BaCe$_{0.25}$Mn$_{0.75}$O$_{3-δ}$ Before and After Thermal Reduction

Author

Roychoudhury, Subhayan, Shulda, Sarah, Goyal, Anuj, Bell, Robert, Sainio, Sami, Strange, Nicholas, Park, James Eujin, Coker, Eric N., Lany, Stephan, Ginley, David, and Prendergast, David

Subjects
Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences
Abstract

BaCe$_{0.25}$Mn$_{0.75}$O$_{3-δ}$ (BCM), a non-stoichiometric oxide closely resembling a perovskite crystal structure, has recently emerged as a prospective contender for application in renewable energy harvesting by solar thermochemical hydrogen generation. Using solar energy, oxygen-vacancies can be created in BCM and the reduced crystal so obtained can, in turn, produce H2 by stripping oxygen from H2O. Therefore, a first step toward understanding the working mechanism and optimizing the performance of BCM, is a thorough and comparative analysis of the electronic structure of the pristine and the reduced material. In this paper, we probe the electronic structure of BCM using the combined effort of first-principles calculations and experimental O K-edge x-ray absorption spectroscopy (XAS). The computed projected density-of-states (PDOS) and orbital-plots are used to propose a simplified model for orbital-mixing between the oxygen and the ligand atoms. With the help of state-of-the-art simulations, we are able to find the origins of the XAS peaks and to categorize them on the basis of contribution from Ce and Mn. For the reduced crystal, the calculations show that, as a consequence of dielectric screening, the change in electron-density resulting from the reduction is strongly localized around the oxygen vacancy. Our experimental studies reveal a marked lowering of the first O K-edge peak in the reduced crystal which is shown to result from a diminished O-2p contribution to the frontier unoccupied orbitals, in accordance with the tight-binding scheme. Our study paves the way for investigation of the working-mechanism of BCM and for computational and experimental efforts aimed at design and discovery of efficient water-splitting oxides.

Published
2022
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80. IgG4-Related Pancreato-Biliary Disease in the Disguise of Malignancy

Author

Mathew, Anvin, Rakesh, Nirjhar Raj, Kaushal, Gourav, Ramachandra, Deepti, Goyal, Anuj, Karthyarth, Mithun Nariampalli, Azad, Shweta, Sanyal, Sumit, and Dhar, Puneet

Abstract

The Immunoglobulin G4-related disease (IgG4-RD) is a multisystem inflammatory condition. Pancreaticobiliary manifestations often present as mass lesions that mimic malignancies. The diagnosis is confirmed by histopathological examination, that shows lymphoplasmacytic infiltration, storiform fibrosis, obliterative phlebitis, and positive immunohistochemistry for IgG4. We encountered 3 such patients in a tertiary care hospital in India. Two patients presented with obstructive jaundice and the third with pain abdomen. They had resectable lesions involving the pancreatic head, the right hepatic duct, and gallbladder fundus, respectively, on imaging. Tumor markers were not significantly elevated in any of them. All 3 patients underwent radical surgeries, suspecting malignancy. Surgical specimens showed typical features of IgG4-RD on histomorphology. Serum IgG4 level was elevated in first 2 patients but was normal in sclerosing cholecystitis patient. To conclude, IgG4-RD is a malignant mimicker; hence, on clinical suspicion, liberal attempts for tissue diagnosis may avoid radical surgeries.

Published
2023
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83. Investigating the Electronic Structure of Prospective Water-Splitting Oxide BaCe0.25Mn0.75O3−δbefore and after Thermal Reduction

Author

Roychoudhury, Subhayan, Shulda, Sarah, Goyal, Anuj, Bell, Robert T., Sainio, Sami, Strange, Nicholas A., Park, James Eujin, Coker, Eric N., Lany, Stephan, Ginley, David S., and Prendergast, David

Abstract

BaCe0.25Mn0.75O3−δ(BCM), a non-stoichiometric oxide with a layered perovskite-like crystal structure, has recently emerged as a prospective contender for application in renewable energy harvesting by solar thermochemical hydrogen generation. Using solar–thermal energy and a reducing environment, oxygen vacancies can be created in high-temperature BCM, and the reduced crystal so obtained can, in turn, produce H2by stripping oxygen from H2O. Therefore, a first step toward understanding the working mechanism and optimizing the performance of BCM is a thorough and comparative analysis of the electronic structure of the pristine and the reduced material. In this paper, we probe the electronic structure of BCM using the combined effort of first-principles calculations and experimental O K-edge X-ray absorption spectroscopy (XAS). The computed projected density of states (PDOS) and orbital plots are used to propose a simplified model for orbital mixing between the oxygen and metal atoms. With the help of state-of-the-art simulations, we are able to find the origins of the XAS peaks and categorize them on the basis of contribution from Ce and Mn. For the reduced crystal, the calculations show that the change in electron density resulting from the reduction is strongly localized around the oxygen vacancy. Experimental measurements reveal a marked lowering of the first O K-edge peak in the reduced crystal. Using theoretical analysis, this is shown to result from lifting of spin degeneracy in the absorption peaks as well as from a diminished O 2p contribution to the frontier unoccupied orbitals, in accordance with the tight binding scheme. The simulated results serve as a reference for the extent of spectral change as a function of the percentage of oxygen vacancies in the reduced crystal. Our study paves the way for the investigation of the working mechanism of BCM and for computational and experimental efforts aimed at design and discovery of efficient water-splitting oxides.

Published
2023
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84. A data fusion approach to optimize compositional stability of halide perovskites

Author

Sun, Shijing, primary, Tiihonen, Armi, additional, Oviedo, Felipe, additional, Liu, Zhe, additional, Thapa, Janak, additional, Zhao, Yicheng, additional, Hartono, Noor Titan P., additional, Goyal, Anuj, additional, Heumueller, Thomas, additional, Batali, Clio, additional, Encinas, Alex, additional, Yoo, Jason J., additional, Li, Ruipeng, additional, Ren, Zekun, additional, Peters, I. Marius, additional, Brabec, Christoph J., additional, Bawendi, Moungi G., additional, Stevanovic, Vladan, additional, Fisher, John, additional, and Buonassisi, Tonio, additional

Published
2021
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86. Alexa Conversations: An Extensible Data-driven Approach for Building Task-oriented Dialogue Systems

Author

Acharya, Anish, primary, Adhikari, Suranjit, additional, Agarwal, Sanchit, additional, Auvray, Vincent, additional, Belgamwar, Nehal, additional, Biswas, Arijit, additional, Chandra, Shubhra, additional, Chung, Tagyoung, additional, Fazel-Zarandi, Maryam, additional, Gabriel, Raefer, additional, Gao, Shuyang, additional, Goel, Rahul, additional, Hakkani-Tur, Dilek, additional, Jezabek, Jan, additional, Jha, Abhay, additional, Kao, Jiun-Yu, additional, Krishnan, Prakash, additional, Ku, Peter, additional, Goyal, Anuj, additional, Lin, Chien-Wei, additional, Liu, Qing, additional, Mandal, Arindam, additional, Metallinou, Angeliki, additional, Naik, Vishal, additional, Pan, Yi, additional, Paul, Shachi, additional, Perera, Vittorio, additional, Sethi, Abhishek, additional, Shen, Minmin, additional, Strom, Nikko, additional, and Wang, Eddie, additional

Published
2021
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92. Association of high sensitivity C - reactive protein with intraoperative difficulty score in laparoscopic cholecystectomy.

Author

Goyal, Anuj, Anandhi, Amaranathan, Sureshkumar, Sathasivam, Arulraj, Kevin, Lakshminarayanan, Subitha, Nanda, Nivedita, and Sistla, Sarath Chandra

Subjects
C-reactive protein, INTRAOPERATIVE care, INFLAMMATION, PATHOLOGY, CHOLECYSTECTOMY
Abstract

Introduction: C reactive protein has been shown to correlate with the severity of inflammation. Since the operative difficulty during laparoscopic cholecystectomy is proportionate to the degree of inflammation, this study was carried out to assess the predictive accuracy of high sensitivity C reactive protein (hs-CRP) level with the operative difficulty and outcome. Methods: This was a prospective study, which included patients who underwent elective laparoscopic cholecystectomy. Difficulty during surgery was graded into mild, moderate, severe, and extreme based upon intra-operative parameters. The association of intraoperative difficulty grading with hs-CRP, total leucocyte count, liver function test, and ultrasonographic findings were studied Results: A total of 103 patients were included in the study. 87 patients were found to have mild to moderate difficulty intraoperatively and 16 were found to have severe to extreme difficulty. Association of hs-CRP with operative difficulty was found to have an adjusted odds ratio of 1.25(1.04, 1.51) with a p-value of 0.009. For a cut-off of 9.63, the sensitivity and specificity of hs-CRP were 62.5% and 62.1%. The positive predictive value and the negative predictive value were 23.25% and 90% respectively. For the calculated cut-off, the accuracy of hs-CRP was 62.13% while overall accuracy for hs-CRP was seen to be 70.5% with a confidence interval of 0.553-0.858. Conclusion: The study shows that the preoperatively measured hs-CRP has moderate sensitivity and specificity for predicting the operative difficulty in elective laparoscopic cholecystectomy. The previous history of acute cholecystitis was also found to be an independent predictor of operative difficulty. [ABSTRACT FROM AUTHOR]

Published
2022

95. A Physical Data Fusion Approach to Optimize Compositional Stability of Halide Perovskites

Author

Sun, Shijing, primary, Tiihonen, Armi, primary, Oviedo, Felipe, primary, Liu, Zhe, primary, Thapa, Janak, primary, Hartono, Noor Titan Putri, primary, Goyal, Anuj, primary, Batali, Clio, primary, Encinas, Alex, primary, Yoo, Jason, primary, Li, Ruipeng, primary, Ren, Zekun, primary, Bawendi, Moungi, primary, Stevanovic, Vladan, primary, Fisher, John, primary, and Buonassisi, Tonio, primary

Published
2020
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