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Exploring the merits of geographical diversification of solar PV power plants for a resilient PV-dominated electricity grid in India

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Clean Energy 2023年第4期7卷 885-910页

作者： Saikat Ghosh Jatindra Nath Roy Chandan Chakraborty Advanced Technology Development Centre Indian Institute of Technology Kharagpur721302India Department of Electrical Engineering Indian Institute of Technology Kharagpur721302India

India is highly dependent on solar photovoltaics(PV)to harness its vast solar resource potential and combat climate ***,∼90%of the installed PV capacity in India is concentrated in the top nine states,with the remaining states lagging *** research reveals that during monsoons,heavy cloud cover and rain lead to high solar resource variability,intermittency and the risk of very low PV generation,which can result in reliability issues in future PV-dominated electricity *** energy storage can help in overcoming high intermittency,there are multiple challenges associated with *** novelty of this study lies in demonstrating the benefits of combining multiple PV sites in various regions to mitigate the risks of low PV generation and high *** variability of individual sites was found to be up to∼3.5 times higher than the variability of combined *** noon,prominent solar park sites like Bhadla and NP Kunta experience a decrease in power generation to values as low as∼10%of the rated PV ***,the minimum generation of the large-scale dispersed PV generation is>30%.Furthermore,the research identifies other benefits of dispersing PV generation across the country,viz.,reduction of seasonal variability by adding PV capacity in the southern region,widening of the PV generation span,more room for PV capacity addition,reduction in storage and ramping needs,utilization of hydroelectric potential of the north-east and PV potential of Ladakh,and creating opportunities for sustainable development in rural agrarian regions through agrivoltaics.

关键词： decarbonization PV-based resilient grid PV variability and intermittency solar PV power plants

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Dry basal plane graphene wrappings on spherical nickel-rich oxide layered particles for lithium-ion batteries

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Journal of Energy Chemistry 2025年第5期104卷 10-19页

作者： Van-Chuong Ho Thanh N.Huynh Thi Huong Pham Hyun-seung Kim Hun-Gi Jung Ki Jae Kim Seung-Min Oh Young-Jun Kim Junyoung Mun School of Advanced Materials Science and Engineering Sungkyunkwan University SKKU Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University Advanced Batteries Research Center Korea Electronics Technology Institute Energy Storage Research Center Korea Institute of Science and Technology KIST-SKKU Carbon-Neutral Research Center Sungkyunkwan University Department of Energy Science Sungkyunkwan University SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University Battery Cell Development Team 1 Research & Development Division Hyundai Motor Company Department of Nano Engineering Sungkyunkwan University

Particle-to-particle dry graphene coatings on Ni-rich layered oxide materials are proposed for highenergy lithium-ion batteries （LIBs） to mitigate the inherent and engineering challenges related to the electrochemically fragile surfaces,as well as limiting electrode thickness and *** a shear stress-based coating process without supplementary solvent or heat treatment,graphene sheets derived from graphene powder are applied onto the surface of spherical LiNi0.89Co0.055Mn0.055O2（NCM） *** process achieves a coating thickness equivalent to or fewer than 10 layers of graphene and exposes the basal *** graphene-coated material increases particle hardness and mitigates degradation caused by inter-particle pressure,enabling the formation of high-density electrodes without *** the absence of additional carbon-conducting agents for the high-density composite electrode with a density of 4.0 g cm-3,it significantly enhances rate capability,demonstrating more than 5 times improvement by achieving 149.4 mAh g-1at 2 C compared to the bare sample (28.9 mAh g-1).Furthermore,the dry graphene coating enables the high areal capacity of 6.98 mAh *** exposing the basal plane of the graphene coating,the process enhances chemical stability,effectively inhibiting side reactions at the interface and mitigating cycle degradation.

关键词： Basal-plane coating Dry graphene coating High areal capacity High electrical conductivity Particle-to-particle

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Volatile Organic Gaseous Compound Biomarkers for Cardiovascular Diseases: A Review

Volatile Organic Gaseous Compound Biomarkers for Cardiovascu...

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2024 International Conference on Innovations and Challenges in Emerging Technologies, ICICET 2024

作者： Kar, Deblina Mandal, Shyamal Kumar Das Bhattacharya, Tarun Kanti Indian Institute of Technology Kharagpur Department of Advanced Technology Development Center Kharagpur India

ISBN: (纸本)9798350319019

The leading reason of death globally is cardiovascular disease. The mortality rate due to heart disease is very high and survival rate is very low. To save lives from this life-threatening disease early diagnosis will be a boon. A non-invasive approach of detecting cardiovascular diseases is exhaled breath biopsy, which contains several volatile organic compounds. These VOCs are those compounds in gaseous state, which are found to be present in victim's expiration at different concentration levels. This paper is a review of such works of detecting the volatiles for Cardiovascular disease. Several methods-GC mass spectrometry, PTR, SIFT are used to detect the gases, among them first method is mostly used. The idea of the measuring sensors is also shared here. This paper is dedicated to find the volatile organic gases for different heart problems, such as-chronic and acute-cardiopulmonary arrest, infarction at myocardium, cardiac ischemia, cardiac necrosis etc. These volatile gases are the biomarkers present in the respired breath of the cardiovascular disease survivors. Using machine learning algorithms, such as-Logistic regression etc. accurate classification of diseases possible. © 2024 IEEE.

关键词： Volatile organic compounds

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Volatile Organic Gaseous Compound Biomarkers for Gastrointestinal Carcinoma: A Review

Volatile Organic Gaseous Compound Biomarkers for Gastrointes...

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2024 International Conference on Innovations and Challenges in Emerging Technologies, ICICET 2024

作者： Kar, Deblina Mandal, Shyamal Kumar Das Bhattacharya, Tarun Kanti Indian Institute of Technology Kharagpur Department of Advanced Technology Development Center Kharagpur India

ISBN: (纸本)9798350319019

Among the deadly diseases most significant disease is stomach cancer or gastrointestinal carcinoma, as it is the most difficult disease to be detected at very early stage. The lack of possible symptoms is the key reason for the difficulty of early diagnosis. Among the gastrointestinal (GI) carcinomas most important cancers are the following 5 carcinomas-esophageal, gastric, liver, pancreas and colorectal. These cancers or tumor cells release the volatile gases due to the change in metabolism and from the blood capillaries the volatiles reach to the lungs. From the nasal airways volatiles are obtained. The procedures such as gas chromatography mass spectrometry (GC-MS), selected ion flow tube mass spectrometry (SIFT-MS) etc. are described with the volatiles. The volatiles obtained for the mentioned diseases are investigated. It is concluded that phenol, methyl & ethyl phenol, pentanoic & hexanoic acid, ethyl phenol and the aldehydes, like-nonanal are the confirmed Volatile Organic Compound (VOC) for gastric and esophageal carcinoma. The bar plot with the concentration in ppb level are shared. Further research on volatile detection is under scope for early diagnosis of these life-threatening diseases. Random forest, Naïve bayes etc. algorithms are used for classifying the diseases into different classes. © 2024 IEEE.

关键词： Diseases

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Study on Model Reference Adaptive Control Scheme to Accommodate Flight Disturbances in Micro Aerial Robots 5

Study on Model Reference Adaptive Control Scheme to Accommod...

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5th IEEE India Council International Subsections Conference, INDISCON 2024

作者： Anand Ronald, K. Iit Kharagpur Advanced Technology Development Centre Kharagpur721302 India

ISBN: (纸本)9798350376753

This paper intends to develop a mathematical model of an adaptive control strategy for micro air vehicles in consideration with associated general flight disturbances, while the common practice is to design controllers for ideal conditions. By adjusting the real-time parameters of the plant, Model Reference Adaptive Scheme (MRAS) tries to maintain the desired performance of the aircraft. The mechanism of adjustment, also called as the adaptive law, gives an optimal outcome, even when the perturbations in the plant are new and unpredictable. The results have been simulated for unstable flight and the augmented flight behavior has been presented. Also, a discussion has been made on the reference model (Proportional Integral Derivative controller - PID) used and the improvement achieved on the implementation of the MRAS to the same. As the work presented here is based on a standard prototype aircraft, there is a possibility of experimental study of fully adaptively controlled quadrotor systems by the authors in the future. © 2024 IEEE.

关键词： Micro air vehicle (MAV)

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SIS technology development to serve Next Generation receivers for ALMA 32

SIS technology development to serve Next Generation receiver...

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32nd International Symposium of Space Terahertz technology, ISSTT 2022

作者： Pavolotsky, Alexey Kojima, Takafumi Masui, Sho Belitsky, Victor Group for Advanced Receiver Development Department of Space Earth and Environment Chalmers University of Technology Gothenburg412-96 Sweden Advanced Technology Center National Astronomical Observatory of Japan Mitaka Tokyo181-8588 Japan

Modern radio astronomy demands for broadband receiver systems. For SIS mixers, this translates into objective to employ superconducting tunnel junctions with a very low RnA and low specific capacitance. The traditionally used Nb/AlOx/Nb junctions have largely approached their physical limit of minimizing those parameters. It is commonly recognized that it is AlNbarrier junctions, which are needed for further progressing of the broadband SIS mixer instrumentation for radio astronomy. In this work, we present the progress in development of the process for high quality Nb/Al-AlN/Nb superconducting tunnel (SIS) junctions’ fabrication and their characterization in terms of their specific capacitance. © 2022 32nd International Symposium of Space Terahertz technology, ISSTT 2022 All rights reserved.

关键词： Aluminum nitride

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Plane-controlled growth strategy improves electrochemical performance of cobalt-free LiNi0.9Mn0.1O2 cathode

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Progress in Natural Science:Materials International 2024年第3期34卷 569-577页

作者： Hao Tong Xun Yuan Ningbo Qin Yaocong Han Yan Cheng Fangli Ji Ruirui Tuo Changlang Liang Yi Wang Qilin Tong Zhaozhe Yu Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Guilin University of Electronic Technology Guangxi CNGR New Energy Science & Technology Co. LTD. Guangxi Institute of Science and Technology Development Co. LTD. School of Chemistry and Chemical Engineering Guangxi Minzu University

The ultra-high nickel-layered cathodes（Ni ≥ 90 %） has garnered significant attention due to its high specific capacity. However, the widespread application of ultra-high nickel-layered cathodes still suffers limitation by structural instability and poor rate performance. Herein, a crystal-face-induced strategy is proposed to enhance rate and cycling performances of the electrode by constructing rapid Li+diffusion channel and reducing internal grain boundaries of secondary particles. The crystal-face-induced strategy facilitates the growth of {010} lattice plane. Highly exposed {010} planes provide wide-open and unobstructed channels for Li+deintercalation/intercalation, enhances the electrode diffusion kinetics, and thus improves the electrode rate performance. In addition, this strategy promotes the primary particle growth, reduces the grain boundaries of secondary particles and mitigates the electrode/electrolyte interface side reactions, enhancing the structural stability and cycling life of the electrode. Accordingly, the modified sample achieved a reversible specific capacity of 198.3 mAh g-1at 1 C(1 C = 180 mA g-1) and maintained a capacity retention rate of 88.5 % after 100 cycles, higher than that of the original sample(73.6 %, 146 mAh g-1). At the high rate of 5 C, it can maintain a high specific capacity of 178mAh g-1（capacity retention rate of 99 %） after 150 cycles. This work is a leap in ultra-high nickel-layered cathodes development and provides insights into the design of electrode materials for other batteries.

关键词： Plane-controlled growth strategy Cobalt-free nickel-rich cathode Rate and cycling performances Lithium-ion battery

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An Optical Feynman Gate Using Cascaded Ti:LiNbO3 Directional Couplers

An Optical Feynman Gate Using Cascaded Ti:LiNbO3 Directional...

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International Conference on Photonics, PHOTONICS 2023

作者： Sattibabu, Romala Dey, Pradip K. Bhaktha, B. N. Shivakiran Ganguly, Pranabendu Advanced Technology Development Centre Kharagpur India Department of Physics Indian Institute of Technology Kharagpur721302 India

ISBN: (纸本)9789819761630

Currently reversible logic has gained lot of interest and it is a reliable solution for optical computing, low-power CMOS, quantum computing and nanotechnology. Being reversible logic, one-to-one mapping between input and output causes minimal loss of information. In fact, optical Feynman gate (FG), one among many reversible logic gates, is a potential candidate for the realization of low power photonic computational circuits. In this paper, we propose and demonstrate an optical FG using four titanium indiffused lithium niobate (Ti:LiNbO3) directional couplers. Design of the integrated-optic chip was performed using Effective-Index based Matrix Method (EIMM). The proof-of-concept of the proposed optical Feynman gate was experimentally verified using Z-cut LiNbO3 substrate. The fabricated device has an insertion loss of ~12.5 dB at TM polarization. The switching voltage of each directional couplers in the chip were around 1.5 V without any buffer layer. The foot-print of the device is 23.8 mm × 0.63 mm. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Directional couplers

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The Eyes Have It: Exploring the Connection Between Domain-Knowledge and Perception 24

The Eyes Have It: Exploring the Connection Between Domain-Kn...

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16th Annual ACM Symposium on Eye Tracking Research and Applications, ETRA 2024

作者： Aatrai, Sonali Prabhala, Sandhya Gayatri Sharma, Saurabh Guha, Rajlakshmi Advanced Technology and Development Centre Indian Institute of Technology Kharagpur India Rekhi Centre Indian Institute of Technology Kharagpur India

ISBN: (纸本)9798400706073

Leveraging prior domain-knowledge significantly impacts perception, and this study explores whether the prior domain-knowledge has any relation with the eye movements. We explore oculometrics of 95 graduate students from Architecture, Social Science, and Biology backgrounds, categorized by their domain-knowledge levels. Students were given unbiased (neutral), domain-biased (architecture and biology) tasks. Oculometrics of the students were captured during the tasks and were analyzed to determine if prior domain-knowledge affected eye movements. Results showed no significant difference between the three groups in the unbiased tasks. However, significant differences emerged in biased tasks between groups with and without domain-knowledge. Signature markers, such as peak saccadic velocity and mean pupil diameter, along with time-correlated parameters of total scanning duration, total fixation duration, total saccadic duration, and fixation count, were found to differentiate novices from those with prior domain-knowledge. The study highlights the importance of oculometrics to distinguish between novices and those with prior domain-knowledge. © 2024 Owner/Author.

关键词： Eye movements

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Size-selective microfluidics delineate the effects of combinatorial immunotherapy on T-cell response dynamics at the single-cell level

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Microsystems & Nanoengineering 2024年第6期10卷 249-265页

作者： Ayan Chatterjee Aniket Bandyopadhyay Tapas Kumar Maiti Tarun Kanti Bhattacharyya Advanced Technology Development Centre Indian Institute of Technology KharagpurKharagpurIndia Institute of Cell Dynamics and Imaging University of MünsterMünsterGermany Department of Biotechnology Indian Institute of Technology KharagpurKharagpurIndia Department of Electronics and Electrical Communication Engineering Indian Institute of Technology KharagpurKharagpurIndia

Cellular communication at the single-cell level holds immense potential for uncovering response heterogeneity in immune cell ***,because of significant size diversity among different immune cell types,controlling the pairing of cells with substantial size differences remains a formidable *** developed a microfluidic platform for size-selective pairing(SSP)to pair single cells with up to a fivefold difference in size,achieving over 40%pairing *** used SSP to investigate the real-time effects of combinatorial immunotherapeutic stimulation on macrophage T-cell interactions at the single-cell level via fluorescence microscopy and microfluidic *** combinatorial activation involving toll-like receptor(TLR)agonists and rapamycin(an mTOR inhibitor)has improved therapeutic efficacy in mice,its clinical success has been ***,we investigated immune synaptic interactions and outcomes at the single-cell level in real time and compared them with bulk-level *** findings,after tracking and computationally analyzing the effects of sequential and spatiotemporal stimulations of primary mouse macrophages,suggest a regulatory role of rapamycin in dampening inflammatory outputs in T cells.

关键词： stimulation fluid pairing

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