Indian Institute of Technology Delhi

Comparative study of sound transmission loss enhancement in double-leaf walls using inertial amplifier and resonator

This paper investigates the sound transmission loss (STL) characteristics of double-leaf walls incorporating different mechanical impedance elements within the cavity, including a spring, a spring–mass–spring (SMS) resonator, and an inertial amplifier (IA). This study presents a...

A physics-assisted deep neural network-based closure framework for velocity gradient dynamics in compressible flows with vibrational non-equilibrium

In this study, we propose a dynamical model for the evolution of velocity gradients in compressible turbulent flows with vibrational non-equilibrium effects, using physics-assisted deep neural networks. Such models provide a powerful framework for understanding the nonlinear phys...

Comprehensive Investigation of Structural, Electrical, and Magnetic Properties of Dy2CoIrO6: A 3d–5d–4f Heterotri-Spin System

Abstract In this work, we present a comprehensive investigation of the structural, electrical, and magnetic properties of Dy2CoIrO6, a 3d–5d–4f heterotri-spin system. X-ray diffraction analysis confirms a distorted monoclinic crystal structure (space group: P21/n) with slight ant...

Visible-Light-Induced Metal-Free Regioselective C–H α-Carbonyl Alkylation of 4-Aminocoumarins Using 10-Phenylphenothiazine

Abstract We report a visible-light-induced photoredox method for the regioselective C3 α-carbonyl alkylation of 4-aminocoumarin derivatives. The protocol avoids transition metals and uses 10-phenylphenothiazine (PTH) as an efficient, inexpensive organic photocatalyst in place of...

Empirical Extraction of Bi-Fractal Metric Breathing via Multi-Messenger Neutrino and Photon Transit Residuals: Unifying Macro-Cosmological Curvature with Local Orbital Harmonics

We present empirical evidence demonstrating that local temporal coordinates and macrocosmologicalevolution are governed by a unified bi-fractal metric framework (Cμν). Utilizingmulti-year archival records of solar neutrino fluxes and photon irradiance (SOHO/VIRGOand Super-Kamioka...

Free-space and satellite-based quantum communication: Principles, implementations, and challenges

Satellite-based quantum communications represent a critical advancement in the pursuit of secure, global-scale quantum networks. Leveraging the principles of quantum mechanics, these systems offer unparalleled security through Quantum Key Distribution and other quantum communicat...

Low-carbon pathways for small communities: A multidimensional framework and a village-scale demonstration

Small communities account for approximately 43% of the global population. Yet they remain underrepresented in operational decarbonization frameworks. Existing frameworks are predominantly urban-centric, sector-specific, and conceptual, lacking community-level validation and a coh...

Spectral-Topological Resolution of the Birch and Swinnerton-Dyer Conjecture via 5D Information-Metric Spacetime Dynamics

We present a rigorous topological and operator-theoretic resolution to the Birch andSwinnerton-Dyer (BSD) conjecture for elliptic curves defined over Q. By mapping rationalpoint distributions of the Mordell-Weil group E(Q) onto bounded geodesics within a 5Dinformation-metric mani...

Enantioselective Pericyclization of Naphthol-Substituted Alkynyl Ketimines

Abstract A vinylidene ortho-quinone methide (VQM)-mediated, organocatalyzed tandem 6π-azaelectrocyclization and dearomatizing spirocycloaddition of naphthol-substituted alkynyl ketimines, facilitated by NBS, have been realized. This strategy enables the enantioselective synthesis...

Photoluminescent Color Centers on a Mainstream Silicon Photonic Foundry Platform

ABSTRACT Silicon photonic integrated circuits fabricated on commercial CMOS‐compatible foundries have propelled major advances in data center communication, quantum computing, and artificial intelligence due to their scalability, mass production, low cost, and high performance. H...

Synergistic evolution of wind turbine design and AI infrastructure: A perspective on policy and future directions

The world is undergoing simultaneous digital and energy revolutions. Rising energy demand, together with rapid expansion of digital infrastructure, is reshaping the relevance and design priorities of modern renewable energy systems. Among these, wind energy remains a major renewa...

Asymmetric Access to Spirobenzofuran Oxindoles via Organocascade Reaction of Unprotected 3-Chlorooxindoles with 2-Hydroxy-β-Nitrostyrenes

Abstract A highly enantioselective methodology has been developed to access oxindole-fused spiro dihydrobenzofuran, applicable to a protecting-group-free reactant, with high bond efficiency (1 new C–C and 1 C–O bond) and two contiguous stereocenters. Gram-scale and stereodivergen...

Experimental study and machine learning based prediction of heat transfer dynamics during droplet impingement on high temperature substrates

Droplet dynamics on heated surface is a complex phenomenon influenced by surface characteristics, and temperature gradients making it challenging to quantify heat transfer accurately through traditional methods. This study presents a novel approach for analysing heat transfer fro...

Database-Driven Modeling Error Assessment of Shear Design Methods for UHPC Flexural Members without Shear Reinforcement

Abstract In recent years, a significant amount of experimentation has been conducted to evaluate the shear behavior of ultra-high performance concrete (UHPC) flexural members. Several codal procedures, including Swiss society of engineers and architects (SIA) 2052:2016, French na...

Valorization of textile waste into high-strength polypropylene composites using an innovative composite fabrication method: A technological strategy towards circular economy

Excessive textile waste generation, pre-consumer or post-consumer, is a major environmental concern when dumped in landfills and incinerated in the open atmosphere. Manufacturers can explore new avenues for profit by leveraging this low-cost waste. Considering this opportunity, t...

Deep Learning the Defect Landscape: Long-Timescale Vacancy Dynamics in Lead-Free Double Perovskites

Abstract Point defects strongly influence charge transport and recombination, as well as structural stability in metal halide perovskites, yet their geometric evolution and impact on dynamic optoelectronic properties are difficult to understand. In lead-free halide double perovsk...

On certain forms of transitivities for linear operators

In this article, we give several characterizations for various transitivity properties for linear operators. We define a general form of ‘Hypercyclicity Criterion’ using a Furstenberg family F to characterize F -transitive operators. In particular, we find an equivalent character...

Smart release biofumigant: temperature-regulated delivery of clove essential oils from diatom-based nanocarriers for store grain pest control

Existing fumigants such as essential oils or synthetic chemicals are limited by high volatility, health impact, instability, and reduced efficacy in stored grain management. These limitations necessitate the development of controlled-release, temperature-responsive alternatives....

Emotional Factors in Quality Negligence: A Study of Residential Real Estate Construction Professionals

Abstract Quality negligence in the construction industry, a significant originator of legal crises, is predominantly attributed to technical and procedural failures. However, the pivotal role of construction professionals’ emotions as a precipitating factor remains a critically u...

Optimization of Capital Structure for Student Housing through the Public–Private Partnership Model in Higher Educational Institutions

Abstract The public–private partnership (PPP) model can serve as a sustainable mechanism to bridge the funding deficit in higher educational institutions (HEIs). Profitability remains a primary objective that compels private partners to bear the risks inherent in this model. This...