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Photon orbits and phase transition for Letelier AdS black holes immersed in perfect fluid dark matter

Chinese Physics C 2024年第6期48卷 247-259页

作者： Ashima sood Md Sabir Ali J.k.Singh Sushant G.Ghosh Department of Mathematics Netaji Subhas University of TechnologyNew Delhi-110078India Centre for Theoretical Physics Jamia Millia IslamiaNew Delhi 110025India Department of Physics Mahishadal Raj CollegePurba MedinipurWest Bengal721628India Institute of Theoretical Physics&Research Center of Gravitation Lanzhou UniversityLanzhou 730000China key Laboratory of Quantum Theory and Applications of MoE Lanzhou UniversityLanzhou 730000China Lanzhou Center for Theoretical Physics&key Laboratory of Theoretical Physics of Gansu Province Lanzhou UniversityLanzhou 730000China Astrophysics and Cosmology Research Unit School of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa

We obtain an exact solution for spherically symmetric Letelier AdS black holes immersed in perfect fluid dark matter(PFDM).Considering the cosmological constant as the positive pressure of the system and volume as its conjugate variable,we analyze the thermodynamics of our black holes in the extended phase *** to the background clouds of strings parameter(a)and the parameter endowed with PFDM(β),we analyze the Hawking temperature,entropy,and specific ***,we investigate the relationship between the photon sphere radius and phase transition for the Letelier AdS black holes immersed in *** the analysis,with a particular condition,non-monotonic behaviors are found between the photon sphere radius,impact parameter,PFDM parameter,temperature,and *** can regard the changes in both the photon sphere radius and impact parameter before and after phase transition as the order parameter;their critical exponents near the critical point are equal to the same value,1/2,similar to that in ordinary thermal *** indicates that a universal relation of gravity may exist near the critical point for a black hole thermodynamic system.

关键词： AdS black holes perfect fluid dark matter Letelier spacetime photon orbit extended phase space thermodynamics correlation of photon orbit and thermodynamics

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发动机故障分析实时微处理机的基本系统

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国外汽车 1987年第3期 67-69页

作者： a.k.sood 朱思敬

本项工作的主要任务是在车上采用微处理机基本装置来检测往复式内燃机故障。本文讨论两种故障检测的数据分析方法:一种是以自相关函数为基础,另一种则需要作傅里叶变换的计算,在到目前为止的少量研究工作中,这两种方法均收到令人满意的... 详细信息

本项工作的主要任务是在车上采用微处理机基本装置来检测往复式内燃机故障。本文讨论两种故障检测的数据分析方法:一种是以自相关函数为基础,另一种则需要作傅里叶变换的计算,在到目前为止的少量研究工作中,这两种方法均收到令人满意的效果。

关键词：自相关函数发动机 AC 正常工况包络线数据采集系统数据处理系统离散傅里叶变换微处理机

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Structural behaviour of carbon single wall nanotubes under high pressure

Structural behaviour of carbon single wall nanotubes under h...

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18th International Conference on High Pressure Science and Technology

作者： Surinder M Sharma S.karmakar S.k.Sikka Pallavi V.Teredesai a.k.sood A.Govindaraj C.N.R.Rao High Pressure Physics Division Bhabha Atomic Research CenterMumbai 400085India High Pressure Physics Division Bhabha Atomic Research CenterMumbai 400085India High Pressure Physics Division Bhabha Atomic Research CenterMumbai 400085India Department of Physics Indian Institute of ScienceBangalore 560012India Department of Physics Indian Institute of ScienceBangalore 560012India Chemistry and Physics of Materials UnitJawaharlal Nehru Centre for Advanced Scientific ResearchJakkur CampusJakkur P.O.Bangalore 560064India Chemistry and Physics of Materials Unit Jawaharlal Nehru Centre for Advanced Scientific ResearchJakkur CampusJakkur P.O.Bangalore 560064India Chemistry and Physics of Materials Unit Jawaharlal Nehru Centre for Advanced Scientific ResearchJakkur CampusJakkur P.O.Bangalore 560064India

＜正＞Single walled carbon nanotubes （SWNTs） can be viewed as tubes formed by the conformal mapping of graphite strips onto cylindrical surfaces. When stacked in bundles, these tubes form a two dimensional triangular lattice. In addition to many interesting and useful physical properties1 of SWNTs, these have been predicted to have remarkable mechanical resilience, such as reversible bending of isolated tubes to -110° 2. Recently several high pressure Raman studies have been carried out to understand the behaviour under high pressure. Based on these studies, existence of a structural phase transformation at 1.7 GPa3 and polygonization of tubes at - 2.5 GPa4 has been suggested. Another Raman investigation indicates a reversible phase transformation at 10 GPa5. To investigate the nature of structural changes under pressure, we have carried out in-situ high pressure x-ray diffraction study on SWNTs up to 13 GPa. These experiments were carried out at the SPringS synchrotron facility. Observed variation of the d-spacings as a function of pressure is shown in Fig. 1. Vanishing of the strongest and only recorded diffraction line （100） of the SWNTs show that the carbon nanotube bundles loose the triangular translational order beyond 10 GPa. However, before losing its translational coherence, the two-dimensional lattice softens substantially as is displayed by an upward jump of dioo of SWNTs in Fig. 1. This is rationalizable in terms of the formation of heterogeneous fins like structures, which may help reduce the average basal strain. These results also provide an explanation for the unusual downward jump of tangential mode of the Raman results at this pressure.5 On release of pressure, the tubes regain the triangular lattice structure. These experimental observations validate the predicted remarkable mechanical resilience of the carbon nanotubes. Our data, which represents hydrostatic environment, gives the bulk modulus to be 34 GPa, which is more than a

关键词： High pressure Single Wall carbon NanoTubes (SWNTs) X-ray diffraction

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发动机故障分析的一种实时微处理机系统

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小型内燃机与车辆技术 1985年第2期 38-45页

作者： a.k.sood A.A.FAHS N.A.HENEIN 朱志元

此项工作的主要目的是发展一种在运输工具上检测往复活塞式内燃机故障的微处理机装置,本文论述了用于故障检测的两种分析方法,第一种方法需要傅里叶变换的计算,而第二种方法则是以自相关函数为基础。两种方法为迄今很少进行的研究提供... 详细信息

此项工作的主要目的是发展一种在运输工具上检测往复活塞式内燃机故障的微处理机装置,本文论述了用于故障检测的两种分析方法,第一种方法需要傅里叶变换的计算,而第二种方法则是以自相关函数为基础。两种方法为迄今很少进行的研究提供了鼓舞人心的结果。

关键词：发动机故障往复活塞式内燃机故障检测故障探测故障诊断飞轮齿圈自相关函数微处理机气缸汽缸气动元件轮齿运输工具包络线数据采集系统数据处理系统保持寄存器装置

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GUARDIAN: A Multi-Tiered Defense Architecture for Thwarting Prompt Injection Attacks on LLMs

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Journal of Software Engineering and Applications 2024年第1期17卷 43-68页

作者： Parijat Rai Saumil sood Vijay k. Madisetti Arshdeep Bahga School of Computer Science Engineering & Technology Bennett University Greater Noida India School of Cybersecurity and Privacy Georgia Institute of Technology Atlanta USA Cloudemy Technology Labs Chandigarh India

This paper introduces a novel multi-tiered defense architecture to protect language models from adversarial prompt attacks. We construct adversarial prompts using strategies like role emulation and manipulative assistance to simulate real threats. We introduce a comprehensive, multi-tiered defense framework named GUARDIAN (Guardrails for Upholding Ethics in Language Models) comprising a system prompt filter, pre-processing filter leveraging a toxic classifier and ethical prompt generator, and pre-display filter using the model itself for output screening. Extensive testing on Meta’s Llama-2 model demonstrates the capability to block 100% of attack prompts. The approach also auto-suggests safer prompt alternatives, thereby bolstering language model security. Quantitatively evaluated defense layers and an ethical substitution mechanism represent key innovations to counter sophisticated attacks. The integrated methodology not only fortifies smaller LLMs against emerging cyber threats but also guides the broader application of LLMs in a secure and ethical manner.

关键词： Large Language Models (LLMs) Adversarial Attack Prompt Injection Filter Defense Artificial Intelligence Machine Learning Cybersecurity

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Anesthetic consideration in Meigs syndrome with large pleural effusion and lung collapse

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Journal of Acute Disease 2024年第1期13卷 43-44,I0006,I0007页

作者： Shalendra Singh Deepak Mishra Deepu k Peter Munish sood Department of Anaesthesiology and Critical Care Command Hospital(NC)UdhampurIndia Department of Anaesthesiology and Critical Care Command Hospital(SC)PuneIndia Department of Pulmonary Medicine Command Hospital(NC)UdhampurIndia Department of Orthopaedics INHSMumbaiIndia

Meigs syndrome(MS)is characterized by a benign ovarian tumor(fibroma),hydrothorax on the right side,and ascites;which can be resolved permanently after *** literature reveals that most MS surgeries were performed under general anesthesia(GA)[1].However,GA poses major risks to the *** the high risk of gastric content regurgitation,poor general condition or dyselectrolytemia may lead to delayed arousal,and associated multi-organ *** mechanical ventilation is also difficult due to ascites and hydrothorax(reduced cardiac output,impaired ventilation-perfusion in lungs causing hypoxia and hypercapnia)[1,2].In this letter,we report a case of MS tumor resection under the subarachnoid block(SAB)to mitigate these issues and also review the complications associated with both techniques.

关键词： anesthesia impaired ascites

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Evaluating Privacy Leakage and Memorization Attacks on Large Language Models (LLMs) in Generative AI Applications

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Journal of Software Engineering and Applications 2024年第5期17卷 421-447页

作者： Harshvardhan Aditya Siddansh Chawla Gunika Dhingra Parijat Rai Saumil sood Tanmay Singh Zeba Mohsin Wase Arshdeep Bahga Vijay k. Madisetti School of Computer Science Engineering & Technology Bennett University Greater Noida India Cloudemy Technology Labs Chandigarh India School of Cybersecurity and Privacy Georgia Institute of Technology Atlanta USA

The recent interest in the deployment of Generative AI applications that use large language models (LLMs) has brought to the forefront significant privacy concerns, notably the leakage of Personally Identifiable Information (PII) and other confidential or protected information that may have been memorized during training, specifically during a fine-tuning or customization process. We describe different black-box attacks from potential adversaries and study their impact on the amount and type of information that may be recovered from commonly used and deployed LLMs. Our research investigates the relationship between PII leakage, memorization, and factors such as model size, architecture, and the nature of attacks employed. The study utilizes two broad categories of attacks: PII leakage-focused attacks (auto-completion and extraction attacks) and memorization-focused attacks (various membership inference attacks). The findings from these investigations are quantified using an array of evaluative metrics, providing a detailed understanding of LLM vulnerabilities and the effectiveness of different attacks.

关键词： Large Language Models PII Leakage Privacy Memorization Overfitting Membership Inference Attack (MIA)

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Investigation of 58Ni(n, p)58Co reaction cross-section with covariance analysis

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Chinese Physics C 2024年第2期48卷 78-90页

作者： Akash Hingu S.Mukherjee Siddharth Parashari Arora Sangeeta A.Gandhi Mahima Upadhyay Mahesh Choudhary Sumit Bamal Namrata Singh G.Mishra Sukanya De Saurav sood Sajin Prasad G.Saxena Ajay kumar R.G.Thomas B.k.Agrawal k.katovsky A.kumar Department of Physics Faculty of ScienceThe M.S.University of BarodaVadodara 390002India Faculty of Electrical Engineering and Communication Brno University of TechnologyBrnoCzech Republic Department of Physics Faculty of ScienceUniversity of ZagrebBijenička c.32Zagreb 10000Croatia Department of Physics University Institute of SciencesChandigarh UniversityGharuanMohali 140413PunjabIndia Department of Physics Banaras Hindu UniversityVaranasi 221005India Horia Hulubei National Institute for Physics and Nuclear Engineering Măgurele 077125Romania Nuclear Physics Division Bhabha Atomic Research CentreMumbai 400085India Health Physics Division Bhabha Atomic Research CentreMumbai 400085India Department of Physics(H&S) Government Women Engineering CollegeAjmer 305002India Saha Institute of Nuclear Physics Kolkata 700064India Homi Bhabha National Institute Anushakti NagarMumbai 400094India

The excitation function of the 58Ni(n,p)58Co reaction was measured using the well-established neutron activation technique andγ-ray *** in the energy range of 1.7 to 2.7 MeV were generated using the 7Li(p,n)*** neutron flux was measured using the standard 115In(n,n’)115mIn monitor *** results of the neutron spectrum averaged cross-section of 58Ni(n,p)58Co reactions were compared with existing cross-section data available in the EXFOR data library as well as with various evaluated data libraries such as ENDF/B-VIII.0,JEFF-3.3,JENDL-4.0,and *** calculations were performed using the nuclear reaction code *** nuclear level density(NLD)models were tested,and their results were compared with the present *** NLDs were also obtained through the spectral distribution method(SDM).The cross-section results,along with the absolute errors,were obtained by investigating the uncertainty propagation and using the covariance *** forγ-ray true coincidence summing,low-energy background neutrons,andγ-ray self attenuation were *** experimental cross-section obtained in the present study is consistent with previously published experimental data,evaluated libraries,and theoretical calculations carried out using the TALYS code.

关键词： nuclear reactions (n,p)reaction cross-section measurement covariance analysis nuclear level density

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Security and QoS issues in blockchain enabled next-generation smart logistic networks:A tutorial

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Blockchain(Research and Applications) 2022年第3期3卷 46-59页

作者： Anjali Vaghani keshav sood Shui Yu Deakin University GeelongVIC3220Australia University of Technology SydneyNSW2007Australia

The blockchain-enabled smart logistics market is expected to grow worth USD 1620 billion and at a compound annual growth rate of 62.4%.Smart logistics ensures intelligence infrastructure,logistics automation,real-time analysis of supply chain data synchronization of the logistics process,cost transparency,unbroken shipment tracking all the way down to the transportation route,*** the smart logistics domain,significant advancement and growth of the Internet of Things(IoT)sensors are ***,the connectivity of IoT systems,including Tactile Internet,without proper safeguards creates vulnerabilities that can still be deliberately or inadvertently cause *** view of this,we primarily notice two key ***,the logistics domain can be compromised by a variety of natural or man-made activities,which eventually affect the overall network ***,there are thousands of entities in the supply chain network that use extensive machine-learning algorithms in many scenarios,and they require high-power computational *** these two challenges,we note that the first concern can be addressed by adding blockchain to IoT logistic *** second issue can be addressed using *** will support 1-μs latency communications,support seamless computing at the edges of networks,and autonomously predict the best optimal location for edge *** by this,we have highlighted motivational examples to show the necessity to integrate 6G and blockchain in smart logistic ***,we have proposed a 6G and blockchain-enabled smart logistic high-level *** have presented the key intrinsic issues of this framework mainly from the security and resource management *** this paper,recent state-of-the-art advances in blockchain enabled next-generation smart logistic networks are *** have also examined why 6G and not 5G would be compatible with the smart *** have introduced five different use cases of blockcha

关键词： Blockchain Internet of Things 5G 6G Security Smart logistics

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Guest editorial:Special issue on security and privacy for AI-powered smart IoT applications

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Digital Communications and Networks 2022年第4期8卷 411-414页

作者： Lianyong Qi Jin Li Mehdi Elahi keshav sood Yuan Yuan Mohammad khosravi Qufu Normal University China Guangzhou University China University of Bergen Norway Deakin University Australia Beihang University China Persian Gulf University Iran

The prevalence of Internet of Things(IoT)applications has generated an unprecedented volume of industrial data that create the main source of big data[1,2].How to effectively and efficiently preprocess,integrate,and analyze big IoT data from multiple sources is still a fundamental challenge[3,4].Fortunately,Artificial Intelligence(AI)has recently emerged as a key technology to achieving intelligent data analyses and scientific business *** algorithms can process the streaming data generated by distributed IoT devices and provide powerful tools to address complex big data analytics[5,6].Therefore,the adaptation of AI-based methods is highly demanded for achieving their full potential in smart IoT ***,the IoT devices,which run in an unstable environment and have poor computing capabilities,are often confronted with a range of application requirements,such as quick response,secure communications,and privacy protection[7,8].Currently,lightweight security and privacy solutions specifically designed for the devices and servers operating in the IoT environment are still lacking.

关键词： IoT smart unstable

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