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607 results on '"Bhattacharya, Rahul"'

4. Introducing flexible perovskites to the IoT world using photovoltaic-powered wireless tags

Author

Kantareddy, Sai Nithin Reddy, Bhattacharya, Rahul, Sarma, Sanjay E., Mathews, Ian, Thapa, Janak, Zhe, Liu, Sun, Shijing, Peters, Ian Marius, and Buonassisi, Tonio

Subjects
Electrical Engineering and Systems Science - Signal Processing, Computer Science - Robotics
Abstract

Billions of everyday objects could become part of the Internet of Things (IoT) by augmentation with low-cost, long-range, maintenance-free wireless sensors. Radio Frequency Identification (RFID) is a low-cost wireless technology that could enable this vision, but it is constrained by short communication range and lack of sufficient energy available to power auxiliary electronics and sensors. Here, we explore the use of flexible perovskite photovoltaic cells to provide external power to semi-passive RFID tags to increase range and energy availability for external electronics such as microcontrollers and digital sensors. Perovskites are intriguing materials that hold the possibility to develop high-performance, low-cost, optically tunable (to absorb different light spectra), and flexible light energy harvesters. Our prototype perovskite photovoltaic cells on plastic substrates have an efficiency of 13% and a voltage of 0.88 V at maximum power under standard testing conditions. We built prototypes of RFID sensors powered with these flexible photovoltaic cells to demonstrate real-world applications. Our evaluation of the prototypes suggests that: i) flexible PV cells are durable up to a bending radius of 5 mm with only a 20 % drop in relative efficiency; ii) RFID communication range increased by 5x, and meets the energy needs (10-350 microwatt) to enable self-powered wireless sensors; iii) perovskite powered wireless sensors enable many battery-less sensing applications (e.g., perishable good monitoring, warehouse automation)

Published
2022

7. Guía internacional para una dosificación más segura de la clozapina en adultos mediante el uso de 6 titulaciones personalizadas de dosis basados en la etnicidad, la proteína C reactiva y los niveles de clozapina

Author

de Leon, Jose, Schoretsanitis, Georgios, Smith, Robert L., Molden, Espen, Solismaa, Anssi, Seppälä, Niko, Kopeček, Miloslav, Švancer, Patrik, Olmos, Ismael, Ricciardi, Carina, Iglesias-Garcia, Celso, Iglesias-Alonso, Ana, Spina, Edoardo, Ruan, Can-Jun, Wang, Chuan-Yue, Wang, Gang, Tang, Yi-Lang, Lin, Shih-Ku, Lane, Hsien-Yuan, Kim, Yong Sik, Kim, Se Hyun, Rajkumar, Anto P., González-Esquivel, Dinora F., Jung-Cook, Helgi, Baptista, Trino, Rohde, Christopher, Nielsen, Jimmi, Verdoux, Hélène, Quiles, Clelia, Sanz, Emilio J., De las Cuevas, Carlos, Cohen, Dan, Schulte, Peter F.J., Ertuğrul, Aygün, Anıl Yağcıoğlu, A. Elif, Chopra, Nitin, McCollum, Betsy, Shelton, Charles, Cotes, Robert O., Kaithi, Arun R., Kane, John M., Farooq, Saeed, Ng, Chee H., Bilbily, John, Hiemke, Christoph, López-Jaramillo, Carlos, McGrane, Ian, Lana, Fernando, Eap, Chin B., Arrojo-Romero, Manuel, Rădulescu, Flavian Ştefan, Seifritz, Erich, Every-Palmer, Susanna, Bousman, Chad A., Bebawi, Emmanuel, Bhattacharya, Rahul, Kelly, Deanna L., Otsuka, Yuji, Lazary, Judit, Torres, Rafael, Yecora, Agustin, Motuca, Mariano, Chan, Sherry Kit Wa, Zolezzi, Monica, Ouanes, Sami, De Berardis, Domenico, Grover, Sandeep, Procyshyn, Ric M., Adebayo, Richard A., Kirilochev, Oleg O., Soloviev, Andrey, Fountoulakis, Konstantinos N., Wilkowska, Alina, Cubała, Wiesław Jerzy, Ayub, Muhammad, Silva, Alzira, Bonelli, Raphael M., Villagrán-Moreno, José María, Crespo-Facorro, Benedicto, Temmingh, Henk, Decloedt, Eric, Pedro, Maria Rosel, Takeuchi, Hiroyoshi, Tsukahara, Masaru, Gründer, Gerhard, Sagud, Marina, Celofiga, Andreja, Ignjatovic Ristic, Dragana, Ortiz, Bruno Bertolucci, Elkis, Helio, Pacheco Palha, António José, Llerena, Adrián, Fernandez-Egea, Emilio, Siskind, Dan, Weizman, Abraham, Masmoudi, Rim, Mohd Saffian, Shamin, Leung, Jonathan G., Buckley, Peter F., Marder, Stephen R., Citrome, Leslie, Freudenreich, Oliver, Correll, Christoph U., and Müller, Daniel J.

Published
2023
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9. Updating Markov inequality: A new bound for tail probabilities.

Author

Bhattacharya, Rahul and Das, Soumyadeep

Subjects
*RANDOM variables, *DISTRIBUTION (Probability theory), *PROBABILITY theory
Abstract

AbstractA new non asymptotic upper bound for the tail probability of a non negative random variable is developed as an alternative to that given by the Markov Inequality. The new bound is derived under the sole assumption of the existence of the first order moment. A thorough comparative investigation of the theoretical properties of the derived bound is envisaged for various probability distributions. [ABSTRACT FROM AUTHOR]

Published
2025
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15. Fixed width confidence interval estimation for general continuous responses under a response adaptive design.

Author

Sarkar, Pritam, Biswas, Atanu, and Bhattacharya, Rahul

Subjects
CONFIDENCE intervals, CLINICAL trials
Abstract

A fixed width confidence interval for the treatment difference is obtained under heteroscedastic normal responses following a response adaptive allocation targeting Neyman optimum allocation. The developed procedure is further extended for general location-scale model based responses under a compound response adaptive allocation. The developed procedures are studied theoretically and are supported empirically assuming various response models. A real data study is also provided following the proposed procedure for the purpose of illustration. [ABSTRACT FROM AUTHOR]

Published
2025
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16. A multi-treatment two stage allocation design for survival outcomes with nonrandom censoring: a copula-based approach.

Author

Das, Soumyadeep, Bhattacharya, Rahul, and Shome, Madhumita

Subjects
*SURVIVAL rate, *CLINICAL trials, *CANCER patients, *CENSORSHIP, *PROBABILITY theory
Abstract

In the context of clinical trials, a multi-treatment two-stage adaptive randomization procedure is developed for survival responses with copula-based nonrandom censoring. Because no such allocation design is available for survival responses with nonrandom censoring, this is probably the first work in this direction. After allocating the first-stage patients by complete randomization (CR), asymptotic p-values of relevant statistical tests are used to derive the allocation probabilities for the second-stage incoming patients. Several design and precision-based operating characteristics of the proposed design are studied both theoretically and empirically and compared with those of the CR procedure and the two-stage design of Bhattacharya and Shome (2019). Applicability of the proposed design is further envisaged through redesigning a real clinical trial with cancer patients. [ABSTRACT FROM AUTHOR]

Published
2024
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34. SFG Based Fault Simulation of Linear Analog Circuits Using Fault Classification and Sensitivity Analysis

Author

Bhattacharya, Rahul, Ragamai, S. H. M., Kumar, Subindu, Barbosa, Simone Diniz Junqueira, Series editor, Chen, Phoebe, Series editor, Filipe, Joaquim, Series editor, Kotenko, Igor, Series editor, Sivalingam, Krishna M., Series editor, Washio, Takashi, Series editor, Yuan, Junsong, Series editor, Zhou, Lizhu, Series editor, Kaushik, Brajesh Kumar, editor, Dasgupta, Sudeb, editor, and Singh, Virendra, editor

Published
2017
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36. The impact of reduced routine community mental healthcare on people from minority ethnic groups during the COVID-19 pandemic: qualitative study of stakeholder perspectives.

Author

Winsper, Catherine, Bhattacharya, Rahul, Bhui, Kamaldeep, Currie, Graeme, Edge, Dawn, Ellard, David, Franklin, Donna, Gill, Paramjit, Gilbert, Steve, Khan, Noreen, Miller, Robin, Motala, Zahra, Pinfold, Vanessa, Sandhu, Harbinder, Singh, Swaran P., Weich, Scott, and Giacco, Domenico

Subjects
COVID-19 pandemic, ETHNIC groups, MINORITIES, CULTURAL pluralism, MENTAL health personnel, ETHNIC differences, PSYCHOLOGICAL resilience
Abstract

Background: Enduring ethnic inequalities exist in mental healthcare. The COVID-19 pandemic has widened these. Aims: To explore stakeholder perspectives on how the COVID-19 pandemic has increased ethnic inequalities in mental healthcare. Method: A qualitative interview study of four areas in England with 34 patients, 15 carers and 39 mental health professionals from National Health Service (NHS) and community organisations (July 2021 to July 2022). Framework analysis was used to develop a logic model of inter-relationships between pre-pandemic barriers and COVID-19 impacts. Results: Impacts were largely similar across sites, with some small variations (e.g. positive service impacts of higher ethnic diversity in area 2). Pre-pandemic barriers at individual level included mistrust and thus avoidance of services and at a service level included the dominance of a monocultural model, leading to poor communication, disengagement and alienation. During the pandemic remote service delivery, closure of community organisations and media scapegoating exacerbated existing barriers by worsening alienation and communication barriers, fuelling prejudice and division, and increasing mistrust in services. Some minority ethnic patients reported positive developments, experiencing empowerment through self-determination and creative activities. Conclusions: During the COVID-19 pandemic some patients showed resilience and developed adaptations that could be nurtured by services. However, there has been a reduction in the availability of group-specific NHS and third-sector services in the community, exacerbating pre-existing barriers. As these developments are likely to have long-term consequences for minority ethnic groups' engagement with mental healthcare, they need to be addressed as a priority by the NHS and its partners. [ABSTRACT FROM AUTHOR]

Published
2024
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38. Improving mental healthcare access and experience for people from minority ethnic groups: an England-wide multisite experience-based codesign (EBCD) study

Author

Winsper, Catherine, primary, Bhattacharya, Rahul, additional, Bhui, Kamaldeep, additional, Currie, Graeme, additional, Edge, Dawn, additional, Ellard, David R, additional, Franklin, Donna, additional, Gill, Paramjit S, additional, Gilbert, Steve, additional, Miller, Robin, additional, Motala, Zahra, additional, Pinfold, Vanessa, additional, Sandhu, Harbinder, additional, Singh, Swaran P, additional, Weich, Scott, additional, and Giacco, Domenico, additional

Published
2023
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40. Digital literacy in contemporary mental healthcare: electronic patient records, outcome measurements and social media.

Author

Tracy, Derek K., Gadelrab, Romayne, Rahim, Ayesha, Pendlebury, Gabrielle, Reza, Hashim, Bhattacharya, Rahul, Bachlani, Asif, Worlley, Katherine, Rigby, David, Scott, Jonathan, and Dave, Subodh

Subjects
DIGITAL literacy, ELECTRONIC records, MEDICAL records, SOCIOMETRY, SOCIAL media
Abstract

SUMMARY: Digital psychiatry has become increasingly important and understanding of certain aspects is essential for practising clinicians. This article discusses electronic patient records (EPRs), from their origins to current and future use, the growth and embedding of outcome measurements, the use of social media, and learning and research in virtual arenas. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Digital literacy in contemporary mental healthcare: online assessments and mobile health apps.

Author

Tracy, Derek K., Gadelrab, Romayne, Rahim, Ayesha, Pendlebury, Gabrielle, Reza, Hashim, Bhattacharya, Rahul, Bachlani, Asif, Worlley, Katherine, Rigby, David, Heath, Maria, and Dave, Subodh

Subjects
DIGITAL literacy, MOBILE health, MOBILE apps, VIRTUAL reality, MEDICAL care
Abstract

SUMMARY: 'Digital' is an omnipresent yet often vague, misunderstood or feared topic in health services. There are many current and potential gains for individual patients and local populations, clinicians and organisations through optimisation of digital technologies. We argue that understanding the various aspects of digital psychiatry is an essential contemporary need. This is the first of two articles on the subject, exploring the gains and challenges of virtual/online assessments, including ethical considerations and the use of virtual reality and electronic prescribing. [ABSTRACT FROM AUTHOR]

Published
2024
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44. Predictors of engagement with peer support: analysis of data from a randomised controlled trial of one-to-one peer support for discharge from inpatient psychiatric care

Author

White, Sarah, primary, Bhattacharya, Rahul, additional, Bremner, Stephen, additional, Faulkner, Alison, additional, Foster, Rhiannon, additional, Gibson, Sarah, additional, Goldsmith, Lucy, additional, Harnett, Daniella, additional, Patel, Akshaykumar, additional, Priebe, Stefan, additional, Repper, Julie, additional, Rinaldi, Miles, additional, Salla, Anthony, additional, Simpson, Alan, additional, Ussher, Michael, additional, and Gillard, Steve, additional

Published
2023
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