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1. A quantum inspired PSO algorithm for energy efficient clustering in wireless sensor networks

Author

Pradeep Kanchan and Shetty D Pushparaj

Subjects
clustering, pso, quantum bits, wireless sensor networks, Engineering (General). Civil engineering (General), TA1-2040
Abstract

Clustering is done in wireless sensor networks (WSN) to conserve the energy of sensor nodes in the network. Decreasing the energy consumption of nodes prolongs the lifetime of the WSN. A quantum bit can exist in “0” state, “1” state or a linear superposition of “0” and “1” states, unlike the binary bit which can exist in only “0” state or “1” state. In this paper, we propose a Quantum inspired PSO (particle swarm optimization) called Quantum-inspired PSO for Energy Efficient Clustering (QPSOEEC). The algorithm is tested by giving different values to the number of sensor nodes and cluster heads, varying the base station position, etc. Then, our results are compared to existing algorithms that demonstrate the superiority of our algorithm.

Published
2018
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2. Quantum Optimizer Using MOEAD for WSN’s

Author

Kanchan, Pradeep, Pushparaj Shetty, D., Attea, Bara’a A., Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Tan, Kay Chen, Series Editor, Thirunavukkarasu, I., editor, and Kumar, Roshan, editor

Published
2024
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3. Transfer Learning Techniques in Medical Image Classification

Author

Radhika Shetty, D. S., Antony, P. J., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Kaiser, M. Shamim, editor, Xie, Juanying, editor, and Rathore, Vijay Singh, editor

Published
2024
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7. Evolution of Single-Particle Energies for N=9 Nuclei at Large N/Z

Author

Wuosmaa A. H., Bedoor S., Alcorta M., Back B. B., Brown B. A., Deibel C. M., Hoffman C. R., Lighthall J. C., Marley S. T., Pardo R. C., Rehm K. E., Rogers A. M., Schiffer J. P., and Shetty D. V.

Subjects
Physics, QC1-999
Abstract

We have studied the nucleus 14B using the 13B(d,p)14B and 15C(d,3He)14B reactions. The two reactions provide complementary information about the negative-parity 1s1/2 and 0d5/2 neutron single-particle states in 14B. The data from the (d,p) reaction give neutron-spectroscopic strengths for these levels, and the (d,3He) results confirm the existence of a broad 2- excited state suggested in the literature. Together these results provide estimates of the sd-shell neutron effective single-particle energies in 14B.

Published
2014
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10. An Approach for Efficient Graph Mining from Big Data Using Spark

Author

Gupta, Rahul Kumar, Pushparaj Shetty, D., Chakraborty, Sonali, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Noor, Arti, editor, Saroha, Kriti, editor, Pricop, Emil, editor, Sen, Abhijit, editor, and Trivedi, Gaurav, editor

Published
2023
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16. Optimizing Network Lifetime and Energy Consumption in Homogeneous Clustered WSNs Using Quantum PSO Algorithm

Author

Kanchan, Pradeep, Pushparaj Shetty, D., Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Sengodan, Thangaprakash, editor, Murugappan, M., editor, and Misra, Sanjay, editor

Published
2021
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17. Long-Term Outcome of Patients with Chronic Thromboembolic Pulmonary Hypertension Following Pulmonary Thromboendarterectomy Surgery - Results from a Referral Centre in India

Author

Khan, B., primary, Singhvi, A., additional, Dhar, S.K., additional, Shetty, V., additional, Punnen, J., additional, Rahguraman, B., additional, Murali Mohan, B., additional, Raj, V., additional, Tousheed, S.J., additional, Patangi, S., additional, Gupta, T., additional, Cherian, G., additional, and Shetty, D., additional

Published
2024
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19. Intelligent Interference Minimization Algorithm for Optimal Placement of Sensors using BBO

Author

Naik, Chandra, Pushparaj Shetty, D., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Pant, Millie, editor, Kumar Sharma, Tarun, editor, Arya, Rajeev, editor, Sahana, B.C., editor, and Zolfagharinia, Hossein, editor

Published
2020
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21. Minimizing the Total Range with Two Power Levels in Wireless Sensor Networks

Author

Shetty D, Pushparaj, Lakshmi, M. Prasanna, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Mandal, Jyotsna Kumar, editor, Bhattacharyya, Dhananjay, editor, and Auluck, Nitin, editor

Published
2019
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22. Novel Schemes for Energy-Efficient IoT

Author

Venkateshwarlu, Kandikonda, Shetty D, Pushparaj, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Mandal, Jyotsna Kumar, editor, Bhattacharyya, Dhananjay, editor, and Auluck, Nitin, editor

Published
2019
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23. Quantum PSO Algorithm for Clustering in Wireless Sensor Networks to Improve Network Lifetime

Author

Kanchan, P., Pushparaj Shetty, D., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Abraham, Ajith, editor, Dutta, Paramartha, editor, Mandal, Jyotsna Kumar, editor, Bhattacharya, Abhishek, editor, and Dutta, Soumi, editor

Published
2019
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24. A Novel Meta-heuristic Differential Evolution Algorithm for Optimal Target Coverage in Wireless Sensor Networks

Author

Naik, Chandra, Pushparaj Shetty, D., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Abraham, Ajith, editor, Gandhi, Niketa, editor, and Pant, Millie, editor

Published
2019
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25. A multi-country analysis of COVID-19 hospitalizations by vaccination status

Author

Goncalves, B, Jassat, W, Baruch, J, Hashmi, M, Rojek, A, Dasgupta, A, Martin-Loeches, I, Reyes, L, Piubelli, C, Citarella, B, Kartsonaki, C, Lefevre, B, Lopez Revilla, J, Lunn, M, Harrison, E, Kraemer, M, Shrapnel, S, Horby, P, Bisoffi, Z, Olliaro, P, Merson, L, Abdukahil, S, Jabal, K, Salah, N, Airlangga, E, Hssain, A, Akwani, C, Al Qasim, E, Alberti, A, Aldabbourosama, O, Alessi, M, Alex, B, Al-Fares, A, Aliudin, J, Alkahlout, M, Almasri, L, Al-Saba'a, Y, Alves, R, Cabrita, J, Amaral, M, Ampaw, P, Anchan, A, Angheben, A, Arabi, Y, Arcadipane, A, Archambault, P, Arenz, L, Arora, R, Ashley, E, Atique, A, Atlowly, M, Bach, B, Baillie, J, Baird, J, Balan, V, Barbalho, R, Barbosa, N, Barclay, W, Barnikel, M, Beer, N, Begum, H, Bellemare, D, Beltrame, A, Bertoli, G, Bianco, C, Humaid, F, Bitton, J, Blier, C, Bogaert, D, Borges, D, Bouhmani, D, Bounphiengsy, T, Bountthasavong, L, Klerk, B, Monteiro, F, Brazzi, L, Buchtele, N, Buonsenso, D, Burrell, A, Bustos, I, Caceres, E, Garces, R, Campisi, J, Canepa, C, Caoili, J, Cardellino, C, Cardoso, F, Cardoso, S, Carney, G, Carrier, F, Carson, G, Cascao, M, Casimiro, J, Castaneda, S, Castanheira, N, Cattaneo, P, Cavalin, R, Cavayas, A, Cevik, M, Chaleunphon, B, Chan, A, Chand, M, Chen, A, Cheng, M, Chommanam, D, Chow, Y, Christy, N, Claure-Del Granado, R, Clohisey, S, Codan, C, Connor, M, Cooke, G, Copland, M, Corley, A, Cortegiani, A, Crowl, G, Cruz, C, Csete, M, Custodio, P, da Silva Filipe, A, Dagens, A, Daley, P, Dalloul, Z, Dalton, H, Dalton, J, Damas, J, Daneman, N, Dankwa, E, Dantas, J, D'Aragon, F, De Rose, C, de Silva, T, Dechert, W, Denis, E, Dishon, Y, K, D, Docherty, A, Donnelly, C, Donohue, C, Douangdala, P, Douglas, J, Downer, T, Downing, M, Drake, T, Dryden, M, Dubot-Peres, A, Dudman, S, Dunning, J, Duplaix, M, Durham, L, Dyrhol-Riise, A, Edelstein, M, Escher, M, Esperatti, M, Santo, C, Estevao, J, Faheem, A, Fairfield, C, Faria, P, Farshait, N, Fernandes, J, Fernandes, M, Ferrao, J, Ferraz, M, Ferreira, B, Figueiredo-Mello, C, Fletcher, T, Flynn, B, Fontela, P, Forsyth, S, Foti, G, Fowler, R, Franch-Llasat, D, Fraser, C, Fraser, J, Ribeiro, A, Friedrich, C, Fuentes, N, G, A, Skeie, L, Gamble, C, Garcia-Diaz, J, Garcia-Gallo, E, Gavin, A, Germano, N, Ghadimi, M, Ghisulal, P, Giani, M, Gibson, J, Girvan, M, Goco, G, Gomez-Junyent, J, Grable, M, Green, C, Greenhalf, W, Griffiths, F, Gruner, H, Gu, Y, Guerguerian, A, Guerreiro, D, Haber, D, Habraken, H, Hafez, W, Hall, M, Halpin, S, Hamdan, S, Hamers, R, Hamza, S, Hardwick, H, Harrison, J, Hartman, A, Heggelund, L, Hendry, R, Hennessy, M, Hesstvedt, L, Higgins, D, Higgins, R, Hinton, S, Ho, A, Holter, J, Horcajada, J, Ming-Yang Hsu, J, Hurd, A, Ijaz, S, Illana, C, Inacio, H, Ippolito, M, Isidoro, T, Jaber, H, Jackson, C, Jaworsky, D, Jenum, S, Jouvet, P, Kalicinska, A, Kandel, C, Katz, K, Kaur, A, Keating, S, Kelly, A, Kelly, S, Kennon, K, Keomany, S, Khalid, I, Kho, M, Khoo, S, Kiiza, P, Granerud, B, Kildal, A, Klenerman, P, Bekken, G, Knight, S, Korten, V, Kosgei, C, Kumar, D, Kutsogiannis, D, Lamontagne, F, Lanza, M, Law, A, Lawrence, T, Lee, J, Lee, T, Leeming, G, Letizia, A, Bassi, G, Liang, J, Lim, W, Lind, A, Lissauer, S, Lopes, D, Lyons, R, Machado, S, Majeed, N, Manetta, F, Sant`Ana Malaque, C, Marquis, C, Marsh, L, Marshall, J, Martin-Quiros, A, Martins, A, Rego, C, Martucci, G, Maslove, D, Matthew, C, Mayxay, M, Mcarthur, C, Mccarthy, A, Mcconnochie, R, Mcdonald, S, Mcgeer, A, Mckay, C, Mclean, K, Menon, K, Mentzer, A, Mesquita, A, Meyer, D, Meynert, A, Mihelis, E, Monteiro, A, Montrucchio, G, Moore, S, Cely, L, Moro, L, Morton, B, Mudara, C, Muhaisen, M, Muller, F, Muller, K, Munshi, L, Murthy, S, Mustafa, D, Nagpal, D, Narasimhan, M, Nasa, P, Nelder, M, Neumann, E, Ng, P, Nichol, A, Norman, L, Notari, A, Noursadeghi, M, Nusantara, D, Occhipinti, G, O'Hearn, K, Oliveira, L, Ong, D, Oosthuyzen, W, Openshaw, P, Palmarini, M, Panarello, G, Panda, P, Parke, R, Patricio, P, Patterson, L, Paul, M, Paulos, J, Paxton, W, Pejkovska, M, Pereira, R, Petrovic, M, Pettersen, F, Pharand, S, Phonemixay, O, Phoutthavong, S, de Piero, M, Pimentel, C, Pires, C, Pitaloka, A, Pius, R, Poli, S, Pollakis, G, Post, A, Povoas, D, Powis, J, Praphasiri, V, Pritchard, M, Semedi, B, Purcell, G, Quesada, L, Quist-Paulsen, E, Rafael, A, Rahardjani, M, Ramalho, J, Rangappa, R, Ratsep, I, Reeve, B, Reikvam, D, Ren, H, Rewa, O, Ricchiuto, A, Rishu, A, Rivera Nunez, M, Roberts, S, Robertson, D, Roche-Campo, F, Rodari, P, Roessler, B, Rossanese, A, Rossetti, M, Russell, C, Holten, A, Saba, I, Sadat, M, Sahraei, V, Salazar, L, Sales, G, Sanchez, E, Sancho-Shimizu, V, Sandhu, G, Sandulescu, O, Santos, M, Sarfo-Mensah, S, Sarmiento, I, Saviciute, E, Schaffer, J, Schwameis, M, Schwartz, G, Scott, J, Scott-Brown, J, Semple, M, Sequeira, T, Shadowitz, E, Shankar, A, Shaw, C, Shaw, V, Mohan Shetty, D, Sibounheuang, B, Sigfrid, L, Sillaots, P, Sin, W, Sinatti, D, Singh, M, Skogen, V, Smith, S, Solomon, J, Solomon, T, Song, R, Spinuzza, E, Sriskandan, S, Staudinger, T, Stecher, S, Steinsvik, T, Stiksrud, B, Streinu-Cercel, A, Stuart, D, Subekti, D, Suen, J, Sultana, A, Summers, C, Suwarti, A, Sztajnbok, J, Tabrizi, S, Taleb, S, Tedder, R, Teixeira, J, Tessier-Grenier, H, Thompson, S, Thomson, E, Thorpe, M, Thwaites, R, Tonby, K, Torre, M, Torres Santos-Olmo, R, Turgeon, A, Turtle, L, Tveita, A, Twardowski, P, Ullrich, R, Uyeki, T, Valentini, P, Val-Flores, L, Varrone, M, Vidal, J, Vieira, C, Villanueva, J, Villar, J, Villoldo, A, Vitiello, C, Vongsouvath, M, Wainstein, M, Webb, S, Wei, J, Wesselius, S, Wham, M, White, N, Willems, S, Williams, B, Williams, V, Wils, E, Wittman, J, Yerkovich, S, Yiaye, T, Zahran, M, Zambon, M, Goncalves B. P., Jassat W., Baruch J., Hashmi M., Rojek A., Dasgupta A., Martin-Loeches I., Reyes L. F., Piubelli C., Citarella B. W., Kartsonaki C., Lefevre B., Lopez Revilla J. W., Lunn M., Harrison E. M., Kraemer M. U. G., Shrapnel S., Horby P., Bisoffi Z., Olliaro P. L., Merson L., Abdukahil S. A., Jabal K. A., Salah N. A., Airlangga E., Hssain A. A., Akwani C., Al Qasim E., Alberti A., Aldabbourosama O., Alessi M., Alex B., Al-Fares A., Aliudin J., Alkahlout M., Almasri L., Al-Saba'a Y., Alves R., Cabrita J. A., Amaral M., Ampaw P., Anchan A. J., Angheben A., Arabi Y., Arcadipane A., Archambault P., Arenz L., Arora R., Ashley E. A., Atique A., Atlowly M., Bach B., Baillie J. K., Baird J. K., Balan V., Barbalho R., Barbosa N. Y., Barclay W. S., Barnikel M., Beer N., Begum H., Bellemare D., Beltrame A., Bertoli G., Bianco C., Humaid F. B., Bitton J., Blier C., Bogaert D., Borges D., Bouhmani D., Bounphiengsy T., Bountthasavong L., Klerk B. B. -D., Monteiro F. B., Brazzi L., Buchtele N., Buonsenso D., Burrell A., Bustos I. G., Cabrita J., Caceres E., Garces R. C., Campisi J., Canepa C., Caoili J., Cardellino C. S., Cardoso F., Cardoso S., Carney G., Carrier F. M., Carson G., Cascao M., Casimiro J., Castaneda S., Castanheira N., Cattaneo P., Cavalin R., Cavayas A., Cevik M., Chaleunphon B., Chan A., Chand M., Chen A., Cheng M. P., Chommanam D., Chow Y. P., Christy N., Claure-Del Granado R., Clohisey S., Codan C., Connor M., Cooke G. S., Copland M., Corley A., Cortegiani A., Crowl G., Cruz C., Csete M., Custodio P., da Silva Filipe A., Dagens A., Daley P., Dalloul Z., Dalton H., Dalton J., Damas J., Daneman N., Dankwa E. A., Dantas J., D'Aragon F., De Rose C., de Silva T., Dechert W., Denis E., Dishon Y., k Dhangar, Docherty A. B., Donnelly C. A., Donohue C., Douangdala P., Douglas J. J., Downer T., Downing M., Drake T., Dryden M., Dubot-Peres A., Dudman S., Dunning J., Duplaix M., Durham L., Dyrhol-Riise A. M., Edelstein M., Escher M., Esperatti M., Santo C. E., Estevao J., Faheem A., Fairfield C. J., Faria P., Farshait N., Fernandes J., Fernandes M. A., Ferrao J., Ferraz M., Ferreira B., Figueiredo-Mello C., Fletcher T., Flynn B., Fontela P., Forsyth S., Foti G., Fowler R. A., Franch-Llasat D., Fraser C., Fraser J. F., Ribeiro A. F., Friedrich C., Fuentes N., G A., Skeie L. G., Gamble C., Garces R., Garcia-Diaz J., Garcia-Gallo E., Gavin A., Germano N., Ghadimi M., Ghisulal P. K., Giani M., Gibson J., Girvan M., Goco G., Gomez-Junyent J., Grable M., Green C. A., Greenhalf W., Griffiths F., Gruner H., Gu Y., Guerguerian A. -M., Guerreiro D., Haber D., Habraken H., Hafez W., Hall M., Halpin S., Hamdan S., Hamers R. L., Hamza S., Hardwick H., Harrison J., Hartman A., Heggelund L., Hendry R., Hennessy M., Hesstvedt L., Higgins D., Higgins R., Hinton S., Ho A., Holter J. C., Horcajada J. P., Ming-Yang Hsu J., Hurd A., Ijaz S., Illana C. C., Inacio H., Ippolito M., Isidoro T., Jaber H., Jackson C., Jaworsky D., Jenum S., Jouvet P., Kalicinska A., Kandel C., Katz K., Kaur A., Keating S., Kelly A., Kelly S., Kennon K., Keomany S., Khalid I., Kho M. E., Khoo S., Kiiza P., Granerud B. K., Kildal A. B., Klenerman P., Bekken G. K., Knight S. R., Korten V., Kosgei C., Kumar D., Kutsogiannis D., Lamontagne F., Lanza M., Law A., Lawrence T., Lee J., Lee T. C., Leeming G., Letizia A., Bassi G. L., Liang J., Lim W. S., Lind A., Lissauer S., Lopes D., Lyons R., Machado S., Majeed N. A., Manetta F., Sant`Ana Malaque C. M., Marquis C., Marsh L., Marshall J., Martin-Quiros A., Martins A., Rego C. M., Martucci G., Maslove D., Matthew C., Mayxay M., McArthur C., McCarthy A., McConnochie R., McDonald S. E., McGeer A., McKay C., McLean K. A., Menon K., Mentzer A. J., Mesquita A., Meyer D., Meynert A. M., Mihelis E., Monteiro A., Montrucchio G., Moore S., Moore S. C., Cely L. M., Moro L., Morton B., Mudara C., Muhaisen M., Muller F., Muller K. E., Munshi L., Murthy S., Mustafa D., Nagpal D., Narasimhan M., Nasa P., Nelder M., Neumann E., Ng P. Y., Nichol A. D., Norman L., Notari A., Noursadeghi M., Nusantara D. U., Occhipinti G., O'Hearn K., Oliveira L., Ong D. S. Y., Oosthuyzen W., Openshaw P., Palmarini M., Panarello G., Panda P. K., Parke R., Patricio P., Patterson L., Paul M., Paulos J., Paxton W. A., Pejkovska M., Pereira R., Petrovic M., Pettersen F. O., Pharand S., Phonemixay O., Phoutthavong S., de Piero M., Pimentel C., Pires C., Pitaloka A., Pius R., Poli S., Pollakis G., Post A. -M., Povoas D., Powis J., Praphasiri V., Pritchard M. G., Semedi B. P., Purcell G., Quesada L., Quist-Paulsen E., Rafael A., Rahardjani M., Ramalho J., Rangappa R., Ratsep I., Reeve B., Reikvam D. H., Ren H., Rewa O., Ricchiuto A., Rishu A., Rivera Nunez M. A., Roberts S., Robertson D. L., Roche-Campo F., Rodari P., Roessler B., Rossanese A., Rossetti M., Russell C. D., Holten A. R., Saba I., Sadat M., Sahraei V., Salazar L., Sales G., Sanchez E., Sancho-Shimizu V., Sandhu G., Sandulescu O., Santos M., Sarfo-Mensah S., Sarmiento I. C. E., Saviciute E., Schaffer J., Schwameis M., Schwartz G., Scott J. T., Scott-Brown J., Semple M. G., Sequeira T., Shadowitz E., Shankar A., Shaw C. A., Shaw V., Mohan Shetty D. R., Sibounheuang B., Sigfrid L., Sillaots P., Sin W. C., Sinatti D., Singh M., Skogen V., Smith S., Solomon J., Solomon T., Song R., Spinuzza E., Sriskandan S., Staudinger T., Stecher S. -S., Steinsvik T., Stiksrud B., Streinu-Cercel A., Stuart D., Subekti D., Suen J. Y., Sultana A., Summers C., Suwarti A., Sztajnbok J., Tabrizi S., Taleb S., Tedder R. S., Teixeira J., Tessier-Grenier H., Thompson S., Thomson E. C., Thorpe M., Thwaites R. S., Tonby K., Torre M., Torres Santos-Olmo R. M., Turgeon A. F., Turtle L. C. W., Tveita A., Twardowski P., Ullrich R., Uyeki T. M., Valentini P., Val-Flores L., Varrone M., Vidal J. E., Vieira C., Villanueva J. A., Villar J., Villoldo A., Vitiello C., Vongsouvath M., Wainstein M., Webb S., Wei J., Wesselius S., Wham M., White N., Willems S., Williams B., Williams V., Wils E. -J., Wittman J., Yerkovich S., Yiaye T., Zahran M., Zambon M., Goncalves, B, Jassat, W, Baruch, J, Hashmi, M, Rojek, A, Dasgupta, A, Martin-Loeches, I, Reyes, L, Piubelli, C, Citarella, B, Kartsonaki, C, Lefevre, B, Lopez Revilla, J, Lunn, M, Harrison, E, Kraemer, M, Shrapnel, S, Horby, P, Bisoffi, Z, Olliaro, P, Merson, L, Abdukahil, S, Jabal, K, Salah, N, Airlangga, E, Hssain, A, Akwani, C, Al Qasim, E, Alberti, A, Aldabbourosama, O, Alessi, M, Alex, B, Al-Fares, A, Aliudin, J, Alkahlout, M, Almasri, L, Al-Saba'a, Y, Alves, R, Cabrita, J, Amaral, M, Ampaw, P, Anchan, A, Angheben, A, Arabi, Y, Arcadipane, A, Archambault, P, Arenz, L, Arora, R, Ashley, E, Atique, A, Atlowly, M, Bach, B, Baillie, J, Baird, J, Balan, V, Barbalho, R, Barbosa, N, Barclay, W, Barnikel, M, Beer, N, Begum, H, Bellemare, D, Beltrame, A, Bertoli, G, Bianco, C, Humaid, F, Bitton, J, Blier, C, Bogaert, D, Borges, D, Bouhmani, D, Bounphiengsy, T, Bountthasavong, L, Klerk, B, Monteiro, F, Brazzi, L, Buchtele, N, Buonsenso, D, Burrell, A, Bustos, I, Caceres, E, Garces, R, Campisi, J, Canepa, C, Caoili, J, Cardellino, C, Cardoso, F, Cardoso, S, Carney, G, Carrier, F, Carson, G, Cascao, M, Casimiro, J, Castaneda, S, Castanheira, N, Cattaneo, P, Cavalin, R, Cavayas, A, Cevik, M, Chaleunphon, B, Chan, A, Chand, M, Chen, A, Cheng, M, Chommanam, D, Chow, Y, Christy, N, Claure-Del Granado, R, Clohisey, S, Codan, C, Connor, M, Cooke, G, Copland, M, Corley, A, Cortegiani, A, Crowl, G, Cruz, C, Csete, M, Custodio, P, da Silva Filipe, A, Dagens, A, Daley, P, Dalloul, Z, Dalton, H, Dalton, J, Damas, J, Daneman, N, Dankwa, E, Dantas, J, D'Aragon, F, De Rose, C, de Silva, T, Dechert, W, Denis, E, Dishon, Y, K, D, Docherty, A, Donnelly, C, Donohue, C, Douangdala, P, Douglas, J, Downer, T, Downing, M, Drake, T, Dryden, M, Dubot-Peres, A, Dudman, S, Dunning, J, Duplaix, M, Durham, L, Dyrhol-Riise, A, Edelstein, M, Escher, M, Esperatti, M, Santo, C, Estevao, J, Faheem, A, Fairfield, C, Faria, P, Farshait, N, Fernandes, J, Fernandes, M, Ferrao, J, Ferraz, M, Ferreira, B, Figueiredo-Mello, C, Fletcher, T, Flynn, B, Fontela, P, Forsyth, S, Foti, G, Fowler, R, Franch-Llasat, D, Fraser, C, Fraser, J, Ribeiro, A, Friedrich, C, Fuentes, N, G, A, Skeie, L, Gamble, C, Garcia-Diaz, J, Garcia-Gallo, E, Gavin, A, Germano, N, Ghadimi, M, Ghisulal, P, Giani, M, Gibson, J, Girvan, M, Goco, G, Gomez-Junyent, J, Grable, M, Green, C, Greenhalf, W, Griffiths, F, Gruner, H, Gu, Y, Guerguerian, A, Guerreiro, D, Haber, D, Habraken, H, Hafez, W, Hall, M, Halpin, S, Hamdan, S, Hamers, R, Hamza, S, Hardwick, H, Harrison, J, Hartman, A, Heggelund, L, Hendry, R, Hennessy, M, Hesstvedt, L, Higgins, D, Higgins, R, Hinton, S, Ho, A, Holter, J, Horcajada, J, Ming-Yang Hsu, J, Hurd, A, Ijaz, S, Illana, C, Inacio, H, Ippolito, M, Isidoro, T, Jaber, H, Jackson, C, Jaworsky, D, Jenum, S, Jouvet, P, Kalicinska, A, Kandel, C, Katz, K, Kaur, A, Keating, S, Kelly, A, Kelly, S, Kennon, K, Keomany, S, Khalid, I, Kho, M, Khoo, S, Kiiza, P, Granerud, B, Kildal, A, Klenerman, P, Bekken, G, Knight, S, Korten, V, Kosgei, C, Kumar, D, Kutsogiannis, D, Lamontagne, F, Lanza, M, Law, A, Lawrence, T, Lee, J, Lee, T, Leeming, G, Letizia, A, Bassi, G, Liang, J, Lim, W, Lind, A, Lissauer, S, Lopes, D, Lyons, R, Machado, S, Majeed, N, Manetta, F, Sant`Ana Malaque, C, Marquis, C, Marsh, L, Marshall, J, Martin-Quiros, A, Martins, A, Rego, C, Martucci, G, Maslove, D, Matthew, C, Mayxay, M, Mcarthur, C, Mccarthy, A, Mcconnochie, R, Mcdonald, S, Mcgeer, A, Mckay, C, Mclean, K, Menon, K, Mentzer, A, Mesquita, A, Meyer, D, Meynert, A, Mihelis, E, Monteiro, A, Montrucchio, G, Moore, S, Cely, L, Moro, L, Morton, B, Mudara, C, Muhaisen, M, Muller, F, Muller, K, Munshi, L, Murthy, S, Mustafa, D, Nagpal, D, Narasimhan, M, Nasa, P, Nelder, M, Neumann, E, Ng, P, Nichol, A, Norman, L, Notari, A, Noursadeghi, M, Nusantara, D, Occhipinti, G, O'Hearn, K, Oliveira, L, Ong, D, Oosthuyzen, W, Openshaw, P, Palmarini, M, Panarello, G, Panda, P, Parke, R, Patricio, P, Patterson, L, Paul, M, Paulos, J, Paxton, W, Pejkovska, M, Pereira, R, Petrovic, M, Pettersen, F, Pharand, S, Phonemixay, O, Phoutthavong, S, de Piero, M, Pimentel, C, Pires, C, Pitaloka, A, Pius, R, Poli, S, Pollakis, G, Post, A, Povoas, D, Powis, J, Praphasiri, V, Pritchard, M, Semedi, B, Purcell, G, Quesada, L, Quist-Paulsen, E, Rafael, A, Rahardjani, M, Ramalho, J, Rangappa, R, Ratsep, I, Reeve, B, Reikvam, D, Ren, H, Rewa, O, Ricchiuto, A, Rishu, A, Rivera Nunez, M, Roberts, S, Robertson, D, Roche-Campo, F, Rodari, P, Roessler, B, Rossanese, A, Rossetti, M, Russell, C, Holten, A, Saba, I, Sadat, M, Sahraei, V, Salazar, L, Sales, G, Sanchez, E, Sancho-Shimizu, V, Sandhu, G, Sandulescu, O, Santos, M, Sarfo-Mensah, S, Sarmiento, I, Saviciute, E, Schaffer, J, Schwameis, M, Schwartz, G, Scott, J, Scott-Brown, J, Semple, M, Sequeira, T, Shadowitz, E, Shankar, A, Shaw, C, Shaw, V, Mohan Shetty, D, Sibounheuang, B, Sigfrid, L, Sillaots, P, Sin, W, Sinatti, D, Singh, M, Skogen, V, Smith, S, Solomon, J, Solomon, T, Song, R, Spinuzza, E, Sriskandan, S, Staudinger, T, Stecher, S, Steinsvik, T, Stiksrud, B, Streinu-Cercel, A, Stuart, D, Subekti, D, Suen, J, Sultana, A, Summers, C, Suwarti, A, Sztajnbok, J, Tabrizi, S, Taleb, S, Tedder, R, Teixeira, J, Tessier-Grenier, H, Thompson, S, Thomson, E, Thorpe, M, Thwaites, R, Tonby, K, Torre, M, Torres Santos-Olmo, R, Turgeon, A, Turtle, L, Tveita, A, Twardowski, P, Ullrich, R, Uyeki, T, Valentini, P, Val-Flores, L, Varrone, M, Vidal, J, Vieira, C, Villanueva, J, Villar, J, Villoldo, A, Vitiello, C, Vongsouvath, M, Wainstein, M, Webb, S, Wei, J, Wesselius, S, Wham, M, White, N, Willems, S, Williams, B, Williams, V, Wils, E, Wittman, J, Yerkovich, S, Yiaye, T, Zahran, M, Zambon, M, Goncalves B. P., Jassat W., Baruch J., Hashmi M., Rojek A., Dasgupta A., Martin-Loeches I., Reyes L. F., Piubelli C., Citarella B. W., Kartsonaki C., Lefevre B., Lopez Revilla J. W., Lunn M., Harrison E. M., Kraemer M. U. G., Shrapnel S., Horby P., Bisoffi Z., Olliaro P. L., Merson L., Abdukahil S. A., Jabal K. A., Salah N. A., Airlangga E., Hssain A. A., Akwani C., Al Qasim E., Alberti A., Aldabbourosama O., Alessi M., Alex B., Al-Fares A., Aliudin J., Alkahlout M., Almasri L., Al-Saba'a Y., Alves R., Cabrita J. A., Amaral M., Ampaw P., Anchan A. J., Angheben A., Arabi Y., Arcadipane A., Archambault P., Arenz L., Arora R., Ashley E. A., Atique A., Atlowly M., Bach B., Baillie J. K., Baird J. K., Balan V., Barbalho R., Barbosa N. Y., Barclay W. S., Barnikel M., Beer N., Begum H., Bellemare D., Beltrame A., Bertoli G., Bianco C., Humaid F. B., Bitton J., Blier C., Bogaert D., Borges D., Bouhmani D., Bounphiengsy T., Bountthasavong L., Klerk B. B. -D., Monteiro F. B., Brazzi L., Buchtele N., Buonsenso D., Burrell A., Bustos I. G., Cabrita J., Caceres E., Garces R. C., Campisi J., Canepa C., Caoili J., Cardellino C. S., Cardoso F., Cardoso S., Carney G., Carrier F. M., Carson G., Cascao M., Casimiro J., Castaneda S., Castanheira N., Cattaneo P., Cavalin R., Cavayas A., Cevik M., Chaleunphon B., Chan A., Chand M., Chen A., Cheng M. P., Chommanam D., Chow Y. P., Christy N., Claure-Del Granado R., Clohisey S., Codan C., Connor M., Cooke G. S., Copland M., Corley A., Cortegiani A., Crowl G., Cruz C., Csete M., Custodio P., da Silva Filipe A., Dagens A., Daley P., Dalloul Z., Dalton H., Dalton J., Damas J., Daneman N., Dankwa E. A., Dantas J., D'Aragon F., De Rose C., de Silva T., Dechert W., Denis E., Dishon Y., k Dhangar, Docherty A. B., Donnelly C. A., Donohue C., Douangdala P., Douglas J. J., Downer T., Downing M., Drake T., Dryden M., Dubot-Peres A., Dudman S., Dunning J., Duplaix M., Durham L., Dyrhol-Riise A. M., Edelstein M., Escher M., Esperatti M., Santo C. E., Estevao J., Faheem A., Fairfield C. J., Faria P., Farshait N., Fernandes J., Fernandes M. A., Ferrao J., Ferraz M., Ferreira B., Figueiredo-Mello C., Fletcher T., Flynn B., Fontela P., Forsyth S., Foti G., Fowler R. A., Franch-Llasat D., Fraser C., Fraser J. F., Ribeiro A. F., Friedrich C., Fuentes N., G A., Skeie L. G., Gamble C., Garces R., Garcia-Diaz J., Garcia-Gallo E., Gavin A., Germano N., Ghadimi M., Ghisulal P. K., Giani M., Gibson J., Girvan M., Goco G., Gomez-Junyent J., Grable M., Green C. A., Greenhalf W., Griffiths F., Gruner H., Gu Y., Guerguerian A. -M., Guerreiro D., Haber D., Habraken H., Hafez W., Hall M., Halpin S., Hamdan S., Hamers R. L., Hamza S., Hardwick H., Harrison J., Hartman A., Heggelund L., Hendry R., Hennessy M., Hesstvedt L., Higgins D., Higgins R., Hinton S., Ho A., Holter J. C., Horcajada J. P., Ming-Yang Hsu J., Hurd A., Ijaz S., Illana C. C., Inacio H., Ippolito M., Isidoro T., Jaber H., Jackson C., Jaworsky D., Jenum S., Jouvet P., Kalicinska A., Kandel C., Katz K., Kaur A., Keating S., Kelly A., Kelly S., Kennon K., Keomany S., Khalid I., Kho M. E., Khoo S., Kiiza P., Granerud B. K., Kildal A. B., Klenerman P., Bekken G. K., Knight S. R., Korten V., Kosgei C., Kumar D., Kutsogiannis D., Lamontagne F., Lanza M., Law A., Lawrence T., Lee J., Lee T. C., Leeming G., Letizia A., Bassi G. L., Liang J., Lim W. S., Lind A., Lissauer S., Lopes D., Lyons R., Machado S., Majeed N. A., Manetta F., Sant`Ana Malaque C. M., Marquis C., Marsh L., Marshall J., Martin-Quiros A., Martins A., Rego C. M., Martucci G., Maslove D., Matthew C., Mayxay M., McArthur C., McCarthy A., McConnochie R., McDonald S. E., McGeer A., McKay C., McLean K. A., Menon K., Mentzer A. J., Mesquita A., Meyer D., Meynert A. M., Mihelis E., Monteiro A., Montrucchio G., Moore S., Moore S. C., Cely L. M., Moro L., Morton B., Mudara C., Muhaisen M., Muller F., Muller K. E., Munshi L., Murthy S., Mustafa D., Nagpal D., Narasimhan M., Nasa P., Nelder M., Neumann E., Ng P. Y., Nichol A. D., Norman L., Notari A., Noursadeghi M., Nusantara D. U., Occhipinti G., O'Hearn K., Oliveira L., Ong D. S. Y., Oosthuyzen W., Openshaw P., Palmarini M., Panarello G., Panda P. K., Parke R., Patricio P., Patterson L., Paul M., Paulos J., Paxton W. A., Pejkovska M., Pereira R., Petrovic M., Pettersen F. O., Pharand S., Phonemixay O., Phoutthavong S., de Piero M., Pimentel C., Pires C., Pitaloka A., Pius R., Poli S., Pollakis G., Post A. -M., Povoas D., Powis J., Praphasiri V., Pritchard M. G., Semedi B. P., Purcell G., Quesada L., Quist-Paulsen E., Rafael A., Rahardjani M., Ramalho J., Rangappa R., Ratsep I., Reeve B., Reikvam D. H., Ren H., Rewa O., Ricchiuto A., Rishu A., Rivera Nunez M. A., Roberts S., Robertson D. L., Roche-Campo F., Rodari P., Roessler B., Rossanese A., Rossetti M., Russell C. D., Holten A. R., Saba I., Sadat M., Sahraei V., Salazar L., Sales G., Sanchez E., Sancho-Shimizu V., Sandhu G., Sandulescu O., Santos M., Sarfo-Mensah S., Sarmiento I. C. E., Saviciute E., Schaffer J., Schwameis M., Schwartz G., Scott J. T., Scott-Brown J., Semple M. G., Sequeira T., Shadowitz E., Shankar A., Shaw C. A., Shaw V., Mohan Shetty D. R., Sibounheuang B., Sigfrid L., Sillaots P., Sin W. C., Sinatti D., Singh M., Skogen V., Smith S., Solomon J., Solomon T., Song R., Spinuzza E., Sriskandan S., Staudinger T., Stecher S. -S., Steinsvik T., Stiksrud B., Streinu-Cercel A., Stuart D., Subekti D., Suen J. Y., Sultana A., Summers C., Suwarti A., Sztajnbok J., Tabrizi S., Taleb S., Tedder R. S., Teixeira J., Tessier-Grenier H., Thompson S., Thomson E. C., Thorpe M., Thwaites R. S., Tonby K., Torre M., Torres Santos-Olmo R. M., Turgeon A. F., Turtle L. C. W., Tveita A., Twardowski P., Ullrich R., Uyeki T. M., Valentini P., Val-Flores L., Varrone M., Vidal J. E., Vieira C., Villanueva J. A., Villar J., Villoldo A., Vitiello C., Vongsouvath M., Wainstein M., Webb S., Wei J., Wesselius S., Wham M., White N., Willems S., Williams B., Williams V., Wils E. -J., Wittman J., Yerkovich S., Yiaye T., Zahran M., and Zambon M.

Abstract

Background: Individuals vaccinated against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), when infected, can still develop disease that requires hospitalization. It remains unclear whether these patients differ from hospitalized unvaccinated patients with regard to presentation, coexisting comorbidities, and outcomes. Methods: Here, we use data from an international consortium to study this question and assess whether differences between these groups are context specific. Data from 83,163 hospitalized COVID-19 patients (34,843 vaccinated, 48,320 unvaccinated) from 38 countries were analyzed. Findings: While typical symptoms were more often reported in unvaccinated patients, comorbidities, including some associated with worse prognosis in previous studies, were more common in vaccinated patients. Considerable between-country variation in both in-hospital fatality risk and vaccinated-versus-unvaccinated difference in this outcome was observed. Conclusions: These findings will inform allocation of healthcare resources in future surges as well as design of longer-term international studies to characterize changes in clinical profile of hospitalized COVID-19 patients related to vaccination history. Funding: This work was made possible by the UK Foreign, Commonwealth and Development Office and Wellcome (215091/Z/18/Z, 222410/Z/21/Z, 225288/Z/22/Z, and 220757/Z/20/Z); the Bill & Melinda Gates Foundation (OPP1209135); and the philanthropic support of the donors to the University of Oxford's COVID-19 Research Response Fund (0009109). Additional funders are listed in the “acknowledgments” section.

Published
2023

26. Timescale for equilibration of N/Z gradients in dinuclear systems

Author

Brown, K., Hudan, S., de Souza, R. T., Gauthier, J., Roy, R., Shetty, D. V., Souliotis, G. A., and Yennello, S. J.

Subjects
Nuclear Experiment
Abstract

Equilibration of N/Z in binary breakup of an excited and transiently deformed projectile-like fragment (PLF*), produced in peripheral collisions of 64Zn + 27Al, 64Zn, 209Bi at E/A = 45 MeV, is examined. The composition of emitted light fragments (3<=Z<=6) changes with the decay angle of the PLF*. The most neutron-rich fragments observed are associated with a small rotation angle. A clear target dependence is observed with the largest initial N/Z correlated with the heavy, neutron-rich target. Using the rotation angle as a clock, we deduce that N/Z equilibration persists for times as long as 3-4 zs (1zs = 1 x 10^-21 s = 300 fm/c). The rate of N/Z equilibration is found to depend on the initial neutron gradient within the PLF*., Comment: 6 pages, 4 figures

Published
2013
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27. Democratic decay of 6Be exposed by correlations

Author

Egorova, I. A., Charity, R. J., Grigorenko, L. V., Chajecki, Z., Coupland, D., Elson, J. M., Ghosh, T. K., Howard, M. E., Iwasaki, H., Kilburn, M., Lee, Jenny, Lynch, W. G., Manfredi, J., Marley, S. T., Sanetullaev, A., Shane, R., Shetty, D. V., Sobotka, L. G., Tsang, M. B., Winkelbauer, J., Wuosmaa, A. H., Youngs, M., and Zhukov, M. V.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The interaction of an E/A=70 - MeV 7Be beam with a Be target was used to populate levels in 6Be following neutron knockout reactions. The three-body decay of the ground and first excited states into the alpha+p+p exit channel were detected in the High Resolution Array. Precise three-body correlations extracted from the experimental data allowed us to obtain insight into the mechanism of the three-body democratic decay. The correlation data are in a good agreement with a three-cluster-model calculation and thus validate this theoretical approach over a broad energy range., Comment: 5 pages, 7 figures; Corrected typos

Published
2012
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28. Constraining the Symmetry Term in the Nuclear Equation of State at Sub-Saturation Densities and Finite Temperatures

Author

Marini, P., Bonasera, A., McIntosh, A., Tripathi, R., Galanopoulos, S., Hagel, K., Heilborn, L., Kohley, Z., May, L. W., Mehlman, M., Soisson, S. N., Souliotis, G. A., Shetty, D. V., Smith, W. B., Stein, B. C., Wuenschel, S., and Yennello, S. J.

Subjects
Nuclear Experiment
Abstract

Methods of extraction of the symmetry energy (or enthalpy) coefficient to temperature ratio from isobaric and isotopic yields of fragments produced in Fermi-energy heavy-ion collisions are discussed. We show that the methods are consistent when the hot fragmenting source is well characterized and its excitation energy and isotopic composition are properly taken into account. The results are independent of the mass number of the detected fragments, which suggests that their fate is decided very early in the reaction., Comment: 12 pages, 9 figures, submitted to Phys. Rev. C and accepted for publication

Published
2012
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30. Investigations of three, four, and five-particle exit channels of levels in light nuclei created using a 9C beam

Author

Charity, R. J., Elson, J. M., Manfredi, J., Shane, R., Sobotka, L. G., Brown, B. A., Chajecki, Z., Coupland, D., Iwasaki, H., Kilburn, M., Lee, Jenny, Lynch, W. G., Sanetullaev, A., Tsang, M. B., Winkelbauer, J., Youngs, M., Marley, S. T., Shetty, D. V., Wuosmaa, A. H., Ghosh, T. K., and Howard, M. E.

Subjects
Nuclear Experiment
Abstract

The interactions of a E/A=70-MeV 9C beam with a Be target was used to populate levels in Be, B, and C isotopes which undergo decay into many-particle exit channels. The decay products were detected in the HiRA array and the level energies were identified from their invariant mass. Correlations between the decay products were examined to deduce the nature of the decays, specifically to what extent all the fragments were created in one prompt step or whether the disintegration proceeded in a sequential fashion through long-lived intermediate states. In the latter case, information on the spin of the level was also obtained. Of particular interest is the 5-body decay of the 8C ground state which was found to disintegrate in two steps of two-proton decay passing through the 6Beg.s. intermediate state. The isobaric analog of 8Cg.s. in 8B was also found to undergo two-proton decay to the isobaric analog of 6Beg.s. in 6Li. A 9.69-MeV state in 10C was found to undergo prompt 4-body decay to the 2p+2alpha exit channel. The two protons were found to have a strong enhancementin the diproton region and the relative energies of all four p-alpha pairs were consistent with the 5Lig.s. resonance.

Published
2011
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31. Analysis of fragment yield ratios in the nuclear phase transition

Author

Tripathi, R., Bonasera, A., Wuenschel, S., May, L. W., Kohley, Z., Souliotis, G. A., Galanopoulos, S., Hagel, K., Shetty, D. V., Huseman, K., Soisson, S. N., Stein, B. C., and Yennello, S. J.

Subjects
Nuclear Experiment
Abstract

The critical phenomena of the liquid-gas phase transition has been investigated in the reactions 78,86Kr+58,64Ni at beam energy of 35 MeV/nucleon using the Landau free energy approach with isospin asymmetry as an order parameter. Fits to the free energy of fragments showed three minima suggesting the system to be in the regime of a first order phase transition. The relation m =-{\partial}F/{\partial}H, which defines the order parameter and its conjugate field H, has been experimentally verified from the linear dependence of the mirror nuclei yield ratio data, on the isospin asymmetry of the source. The slope parameter, which is a measure of the distance from a critical temperature, showed a systematic decrease with increasing excitation energy of the source. Within the framework of the Landau free energy approach, isoscaling provided similar results as obtained from the analysis of mirror nuclei yield ratio data. We show that the external field is primarily related to the minimum of the free energy, which implies a modification of the source concentration \Delta used in isospin studies.

Published
2010
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32. Measuring the Temperature of Hot Nuclear Fragments

Author

Wuenschel, S., Bonasera, A., May, L. W., Souliotis, G. A., Tripathi, R., Galanopoulos, S., Kohley, Z., Hagel, K., Shetty, D. V., Huseman, K., Soisson, S. N., Stein, B. C., and Yennello, S. J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

A new thermometer based on fragment momentum fluctuations is presented. This thermometer exhibited residual contamination from the collective motion of the fragments along the beam axis. For this reason, the transverse direction has been explored. Additionally, a mass dependence was observed for this thermometer. This mass dependence may be the result of the Fermi momentum of nucleons or the different properties of the fragments (binding energy, spin etc..) which might be more sensitive to different densities and temperatures of the exploding fragments. We expect some of these aspects to be smaller for protons (and/or neutrons); consequently, the proton transverse momentum fluctuations were used to investigate the temperature dependence of the source.

Published
2010
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33. Nuclear symmetry energy: An experimental overview

Author

Shetty, D. V. and Yennello, S. J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The nuclear symmetry energy is a fundamental quantity important for studying the structure of systems as diverse as the atomic nucleus and the neutron star. Considerable efforts are being made to experimentally extract the symmetry energy and its dependence on nuclear density and temperature. In this article, we review experimental studies carried out up-to-date and their current status., Comment: 10 pages, 3 figures, talk presented at the International Symposium in Nuclear Physics, Mumbai, India, Dec. 2009. Added few more references. Minor correction in Reference

Published
2010
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34. Effective nucleon mass and the nuclear caloric curve

Author

Shetty, D. V., Souliotis, G. A., Galanopoulos, S., and Yennello, S. J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Assuming a schematic form of the nucleon effective mass as a function of nuclear excitation energy and mass, we provide a simple explanation for understanding the experimentally observed mass dependence of the nuclear caloric curve. It is observed that the excitation energy at which the caloric curve enters into a plateau region, could be sensitive to the nuclear mass evolution of the effective nucleon mass., Comment: 5 pages, 5 figures, Accepted for publication in Phys. Rev. C. Minor changes made

Published
2009
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36. Nuclear expansion and symmetry energy of hot nuclei

Author

Shetty, D. V., Souliotis, G. A., Galanopoulos, S., Kohley, Z., Soisson, S. N., Stein, B. C., Wuenschel, S., and Yennello, S. J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The decrease in the symmetry energy of hot nuclei populated in $^{58}$Ni + $^{58}$Ni, $^{58}$Fe + $^{58}$Ni and $^{58}$Fe + $^{58}$Fe reactions at beam energies of 30, 40, and 47 MeV/nucleon, as a function of excitation energy is studied. It is observed that this decrease is mainly a consequence of increasing expansion or decreasing density rather than the increasing temperature. The results are in good agreement with the recently reported microscopic calculation based on the Thomas-Fermi approach. An empirical relation to study the symmetry energy of finite nuclei in various mass region is proposed., Comment: 10 pages, 2 figures

Published
2008
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37. Statistical and dynamical aspects in the decay of hot neutron-rich nuclei

Author

Veselsky, M., Keksis, A. L., Souliotis, G. A., Wang, K., Bell, E., Shetty, D. V., Jandel, M., Yennello, S. J., and Ma, Y. G.

Subjects
Nuclear Experiment
Abstract

The signal of isospin-asymmetric phase transition in the evolution of the chemical potential was observed for hot quasi-projectiles produced in the reactions 40,48Ca + 27Al confirming an analogous observation in the lighter system 28Si + 112,124Sn. With increasing mass, the properties of hot quasi-projectiles become increasingly influenced by the secondary emission. Thermodynamical observables exhibit no sensitivity to the different number of missing neutrons in the two reactions 40,48Ca + 27Al, thus providing a signal of dynamical emission of neutrons, which can be related to formation of a very neutron-rich low-density region (neck) between the projectile and target., Comment: LaTeX, article expanded, 2 figures added, 17 pages, 7 figures

Published
2008
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39. Density dependence of the symmetry energy and the nuclear equation of state: A Dynamical and Statistical model perspective

Author

Shetty, D. V., Yennello, S. J., and Souliotis, G. A.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The density dependence of the symmetry energy in the equation of state of isospin asymmetric nuclear matter is of significant importance for studying the structure of systems as diverse as the neutron-rich nuclei and the neutron stars. A number of reactions using the dynamical and the statistical models of multifragmentation, and the experimental isoscaling observable, is studied to extract information on the density dependence of the symmetry energy. It is observed that the dynamical and the statistical model calculations give consistent results assuming the sequential decay effect in dynamical model to be small. A comparison with several other independent studies is also made to obtain important constraint on the form of the density dependence of the symmetry energy. The comparison rules out an extremely " stiff " and " soft " form of the density dependence of the symmetry energy with important implications for astrophysical and nuclear physics studies., Comment: 16 pages, 14 figures

Published
2007
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40. Constraining the density dependence of the symmetry energy in the nuclear equation of state using heavy ion beams

Author

Shetty, D. V., Yennello, S. J., and Souliotis, G. A.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The density dependence of the symmetry energy in the equation of state of asymmetric nuclear matter (N/Z $>$ 1) is important for understanding the structure of systems as diverse as the atomic nuclei and neutron stars. Due to a proper lack of understanding of the basic nucleon-nucleon interaction for matters that are highly asymmetric and at non-normal nuclear density, this very important quantity has remained largely unconstrained. Recent studies using beams from the Cyclotron Institute of Texas A$&$M University, constraining the density dependence of the symmetry energy, is presented. A dependence of the form E$_{sym}(\rho)$ = C($\rho/\rho_{o})^{\gamma}$, where C = 31.6 MeV and $\gamma$ = 0.69, is obtained from the dynamical and statistical model analysis. Their implications to both astrophysical and nuclear physics studies are discussed., Comment: Invited talk, Proceedings of CAARI 2006, Forth Worth, Texas, Aug 20 -25, 2006

Published
2006
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41. Symmetry Energy, Temperature, Density and Isoscaling Parameter as a Function of Excitation energy in A $\sim$ 100 mass region

Author

Shetty, D. V., Yennello, S. J., Souliotis, G. A., Keksis, A. L., Soisson, S. N., Stein, B. C., and Wuenschel, S.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The symmetry energy, temperature, density and isoscaling parameter, in $^{58}$Ni + $^{58}$Ni, $^{58}$Fe + $^{58}$Ni and $^{58}$Fe + $^{58}$Fe reactions at beam energies of 30, 40 and 47 MeV/nucleon, are studied as a function of excitation energy of the multifragmenting source. It is shown that the decrease in the isoscaling parameter is related to the near flattening of the temperature in the caloric curve, and the decrease in the density and the symmetry energy with increasing excitation energy. The decrease in the symmetry energy is mainly a consequence of decreasing density with increasing excitation rather than the increasing temperature. The symmetry energy as a function of density obtained from the correlation is in close agreement with the form, E$_{sym}(\rho)$ $=$ 31.6 ($\rho/\rho_{\circ})^{0.69}$., Comment: 5 pages, 5 figures

Published
2006

42. Neutron to proton ratios of quasiprojectile and midrapidity emission in the $^{64}$Zn + $^{64}$Zn reaction at 45 MeV/nucleon

Author

Theriault, D., Gauthier, J., Grenier, F., Moisan, F., St-Pierre, C., Roy, R., Davin, B., Hudan, S., Paduszynski, T., de Souza, R. T., Bell, E., Garey, J., Iglio, J., Keksis, A. L., Parketon, S., Richers, C., Shetty, D. V., Soisson, S. N., Souliotis, G. A., Stein, B. C., and Yennello, S. J.

Subjects
Nuclear Experiment
Abstract

Simultaneous measurement of both neutrons and charged particles emitted in the reaction $^{64}$Zn + $^{64}$Zn at 45 MeV/nucleon allows comparison of the neutron to proton ratio at midrapidity with that at projectile rapidity. The evolution of N/Z in both rapidity regimes with increasing centrality is examined. For the completely re-constructed midrapidity material one finds that the neutron-to-proton ratio is above that of the overall $^{64}$Zn + $^{64}$Zn system. In contrast, the re-constructed ratio for the quasiprojectile is below that of the overall system. This difference provides the most complete evidence to date of neutron enrichment of midrapidity nuclear matter at the expense of the quasiprojectile.

Published
2006
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43. Reply to 'Comment on `Symmetry energy and the isospin dependent equation of state' '

Author

Shetty, D. V., Yennello, S. J., Botvina, A. S., Souliotis, G. A., Jandel, M., Bell, E., Keksis, A., Soisson, S., Stein, B., and Iglio, J.

Subjects
Nuclear Experiment
Abstract

We show that the large sequential decay corrections obtained by Ono {\it et al} [nucl-ex/0507018], is in contradiction with both the other dynamical and statistical model calculations carried out for the same systems and energy. On the other hand, the conclusion of Shetty {\it {et al.}} $[$Phys. Rev. C 70, 011601R (2004)$]$, that the experimental data favors Gogny$-$AS interaction (obtained assuming a significantly smaller sequential decay effects), is consistent with several other independent studies., Comment: 2 pages, 1 figure

Published
2006

44. Properties of the Initial Participant Matter Interaction Zone in Near Fermi-Energy Heavy Ion Collisions

Author

Wang, J., Keutgen, T., Wada, R., Hagel, K., Kowalski, S., Materna, T., Qin, L., Chen, Z., Natowitz, J. B., Ma, Y. G., Murray, M., Keksis, A., Martin, E., Ruangma, A., Shetty, D. V., Souliotis, G., Veselsky, M., Winchester, E. M., Yennello, S. J., Fabris, D., Lunardon, M., Moretto, S., Nebbia, G., Pesente, S., Rizzi, V., Viesti, G., Cinausero, M., Prete, G., Cibor, J., Zipper, W., Majka, Z., Staszel, P., Masri, Y. El, Alfarro, R., Martinez-Davalos, A., Menchaca-Rocha, A., and Ono, A.

Subjects
Nuclear Experiment
Abstract

The sizes, temperatures and free neutron to proton ratios of the initial interaction zones produced in the collisions of 40 MeV/nucleon $^{40}$Ar + $^{112}$Sn and 55 MeV/nucleon$^{27}$Al + $^{124}$Sn are derived using total detected neutron plus charged particle multiplicity as a measure of the impact parameter range and number of participant nucleons. The size of the initial interaction zone, determined from a coalescence model analysis, increases significantly with decreasing impact parameter. The temperatures and free neutron to proton ratios in the interaction zones are relatively similar for different impact parameter ranges and evolve in a similar fashion., Comment: 7 pages, 8 figures

Published
2006
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45. Tracing the evolution of the symmetry energy of hot nuclear fragments from the compound nucleus towards multifragmentation

Author

Souliotis, G. A., Botvina, A. S., Shetty, D. V., Keksis, A. L., Jandel, M., Veselsky, M., and Yennello, S. J.

Subjects
Nuclear Experiment
Abstract

The evolution of the symmetry energy coefficient of the binding energy of hot fragments with increasing excitation is explored in multifragmentation processes following heavy-ion collisions below the Fermi energy. In this work, high-resolution mass spectrometric data on isotopic distributions of projectile-like fragments from collisions of 25 MeV/nucleon 86Kr and 64Ni beams on heavy neutron-rich targets are systematically compared to calculations involving the Statistical Multifragmentation Model. The study reveals a gradual decrease of the symmetry energy coefficient from 25 MeV at the compound nucleus regime (E*/A < 2 MeV) towards 15 MeV in the bulk multifragmentation regime (E*/A > 4 MeV). The ensuing isotopic distributions of the hot fragments are found to be very wide and extend towards the neutron drip-line. These findings may have important implications to the composition and evolution of hot astrophysical environments, such as core-collapse supernova., Comment: 5 pages, 4 figures, submitted to Phys. Rev. C

Published
2006
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46. Symmetry Energy in the Equation of State of Asymmetric Nuclear Matte

Author

Yennello, S. J., Shetty, D. V., and Souliotis, G. A.

Subjects
Nuclear Experiment
Abstract

The symmetry energy is an important quantity in the equation of state of isospin asymmetric nuclear matter. This currently unknown quantity is key to understanding the structure of systems as diverse as the neutron-rich nuclei and neutron stars. At TAMU, we have carried out studies, aimed at understanding the symmetry energy, in a variety of reactions such as, the multifragmentation of $^{40}$Ar, $^{40}$Ca + $^{58}$Fe, $^{58}$Ni and $^{58}$Ni, $^{58}$Fe + $^{58}$Ni, $^{58}$Fe reactions at 25 - 53 AMeV, and deep-inelastic reactions of $^{86}$Kr + $^{124,112}$Sn, $^{64,58}$Ni (25 AMeV), $^{64}$Ni + $^{64,58}$Ni, $^{112,124}$Sn, $^{232}$Th, $^{208}$Pb (25 AMeV) and $^{136}$Xe + $^{64,58}$Ni, $^{112,124}$Sn, $^{232}$Th, $^{197}$Au (20 AMeV). Here we present an overview of some of the results obtained from these studies. The results are analyzed within the framework of statistical and dynamical models, and have important implications for future experiments using beams of neutron-rich nuclei., Comment: 10 pages, 4 figures, talk presented at VI Latin American Symposium on Nuclear Physics and Applications

Published
2006
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47. Symmetry energy and the isoscaling properties of the fragments produced in $^{40}$Ar, $^{40}$Ca + $^{58}$Fe, $^{58}$Ni reactions at 25 $-$ 53 MeV/nucleon

Author

Iglio, J., Shetty, D. V., Yennello, S. J., Souliotis, G. A., Jandel, M., Keksis, A., Soisson, S., Stein, B., Wuenschel, S., and Botvina, A. S.

Subjects
Nuclear Experiment
Abstract

The symmetry energy and the isoscaling properties of the fragments produced in the multifragmentation of $^{40}$Ar, $^{40}$Ca + $^{58}$Fe, $^{58}$Ni reactions at 25 - 53 MeV/nucleon were investigated within the framework of statistical multifragmentation model. The isoscaling parameters $\alpha$, from the primary (hot) and secondary (cold) fragment yield distributions, were studied as a function of excitation energy, isospin (neutron-to-proton asymmetry) and fragment symmetry energy. It is observed that the isoscaling parameter $\alpha$ decreases with increasing excitation energy and decreasing symmetry energy. The parameter $\alpha$ is also observed to increase with increasing difference in the isospin of the fragmenting system. The sequential decay of the primary fragments into secondary fragments, when studied as a function of excitation energy and isospin of the fragmenting system, show very little influence on the isoscaling parameter. The symmetry energy however, has a strong influence on the isospin properties of the hot fragments. The experimentally observed scaling parameters can be explained by symmetry energy that is significantly lower than that for the ground state nuclei near saturation density. The results indicate that the properties of hot nuclei at excitation energies, densities and isospin away from the normal ground state nuclei could be significantly different., Comment: 14 pages, 15 figures

Published
2005
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48. Heavy Residue Isoscaling as a Probe of the Symmetry Energy of Hot Fragments

Author

Souliotis, G. A., Shetty, D. V., Keksis, A., Bell, E., Jandel, M., Veselsky, M., and Yennello, S. J.

Subjects
Nuclear Experiment
Abstract

The isoscaling properties of isotopically resolved projectile residues from peripheral collisions of 86Kr (25 MeV/nucleon), 64Ni (25 MeV/nucleon) and 136Xe (20 MeV/nucleon) beams on various target pairs are employed to probe the symmetry energy coefficient of the nuclear binding energy. The present study focuses on heavy projectile fragments produced in peripheral and semiperipheral collisions near the onset of multifragment emission E*/A = 2-3 MeV). For these fragments, the measured average velocities are used to extract excitation energies. The excitation energies, in turn, are used to estimate the temperatures of the fragmenting quasiprojectiles in the framework the Fermi gas model. The isoscaling analysis of the fragment yields provided the isoscaling parameters "alpha" which, in combination with temperatures and isospin asymmetries provided the symmetry energy coefficient of the nuclear binding energy of the hot fragmenting quasiprojectiles. The extracted values of the symmetry energy coefficient at this excitation energy range (2-3 MeV/nucleon) are lower than the typical liquid-drop model value ~25 MeV corresponding to ground-state nuclei and show a monotonic decrease with increasing excitation energy. This result is of importance in the formation of hot nuclei in heavy-ion reactions and in hot stellar environments such as supernova., Comment: 11 pages, 9 figures, submitted to Phys. Rev. C

Published
2005
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49. Density Dependence of the Symmetry energy and the Equation of State of Isospin Asymmetric Nuclear Matter

Author

Shetty, D. V., Yennello, S. J., and Souliotis, G. A.

Subjects
Nuclear Experiment, Astrophysics, Nuclear Theory
Abstract

The density dependence of the symmetry energy in the equation of state of isospin asymmetric nuclear matter is studied using the isoscaling of the fragment yields and the antisymmetrized molecular dynamic calculation. It is observed that the experimental data at low densities are consistent with the form of symmetry energy,E$_{sym}$ $\approx$ 31.6 ($\rho/\rho_{\circ})^{0.69}$, in close agreement with those predicted by the results of variational many-body calculation. A comparison of the present result with those reported recently using the NSCL-MSU data suggests that the heavy ion studies favor a dependence of the form, E$_{sym}$ $\approx$ 31.6 ($\rho/\rho_{\circ})^{\gamma}$, where $\gamma$ = 0.6 - 1.05. This constraints the form of the density dependence of the symmetry energy at higher densities, ruling out an extremely " stiff " and " soft " dependences., Comment: 4 pages, 3 figures, minor revison to the text, added few more references

Published
2005
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50. A Ghoshal-like Test of Equilibration in Near-Fermi-Energy Heavy Ion Collisions

Author

Wang, J., Keutgen, T., Wada, R., Hagel, K., Ma, Y. G., Murray, M., Qin, L., Smith, P., Natowitz, J. B., Alfaro, R., Cibor, J., Botvina, A., Cinausero, M., Masri, Y. El, Fabris, D., Keksis, A., Kowalski, S., Lunardon, M., Makeev, A., Marie, N., Martin, E., Majka, Z., Martinez-Davalos, A., Menchaca-Rocha, A., Nebbia, G., Moretto, S., Prete, G., Rizzi, V., Ruangma, A., Shetty, D. V., Souliotis, G., Staszel, P., Veselsky, M., Viesti, G., Winchester, E. M., Yennello, S. J., Zipper, W., and Ono, A.

Subjects
Nuclear Experiment
Abstract

Calorimetric and coalescence techniques have been employed to probe equilibration for hot nuclei produced in heavy ion collisions of 35 to 55 MeV/u projectiles with medium mass targets. Entrance channel mass asymmetries and energies were selected in order that very hot composite nuclei of similar mass and excitation would remain after early stage pre-equilibrium particle emission. Inter-comparison of the properties and de-excitation patterns for these different systems provides evidence for the production of hot nuclei with decay patterns relatively independent of the specific entrance channel., Comment: 7 pages, 2 figures

Published
2004
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