Korea Advanced Institute of Science and Technology

Sensitivity of blast responses in a reinforced concrete slab to damage evolution parameters

Abstract Accurate prediction of blast-induced damage in reinforced concrete (RC) structures requires constitutive models that offer transparent control over softening behavior. This study develops a user-defined material (UMAT) subroutine that extends the built-in concrete damage...

Wafer-scale conformal metasurface optics

Curved and conformal optics provide additional geometric degrees of freedom that enable enhanced optical performance while satisfying non-optical constraints such as ergonomics, aerodynamics, and wearability. However, existing fabrication approaches for curved metasurfaces are li...

A compact, wireless fluorimeter system for continuous, real-time monitoring of tissue perfusion via in vivo fluorescence signals

In vivo fluorescence signals provide physiological and pathological insights for the interpretation of biological states associated with anatomical abnormalities or disease. Conventional methods for measuring fluorescence signals rely on bulky, costly instrumentation for imaging...

Field-Programmable Topological Torons in Chiral Nematic Liquid Crystals

Abstract Torons are three-dimensional double-twist solitons in chiral nematic liquid crystals (LCs), bounded by closed defect loops, that behave as particle-like entities while retaining a fully reconfigurable optical response. Here, it is shown that individual torons can be crea...

System-level reconstruction of RpoD, RpoS, and RpoN regulatory networks in Pseudomonas putida KT2440

Abstract Background Pseudomonas putida KT2440 is a widely recognized industrial chassis with broad metabolic versatility. Its large repertoire of σ-factors enables coordinated transcriptional response to diverse environmental and physiological conditions, yet the regulatory lands...

Transcriptome-based classification in mice with ASD-risk mutations

Autism spectrum disorder (ASD) is a neurodevelopmental condition with a strong genetic component. Large-scale human genetic studies have identified >1200 ASD-risk genes. We report a sex-balanced atlas of 1008 prefrontal RNA sequencing (RNA-seq) profiles from 17 mouse lines carryi...

Every negative amphichiral knot is rationally slice

In 2009, Kawauchi proved that every strongly negative amphichiral knot is rationally slice. However, as shown by Hartley in 1980, there are examples of negative amphichiral knots that are not strongly negative amphichiral. In this paper, we prove that every negative amphichiral l...

The Impact of Intelligent Personal Assistant Usability and Privacy Empowerment on User’s Continuance Intention: An Integrated Model Based on Self-Determination Theory

Intelligent personal assistants (IPAs) are increasingly embedded in everyday digital environments, yet sustained engagement remains limited. Drawing on Self-Determination Theory (SDT), this study examines how IPA usability and privacy empowerment relate to users’ basic psychologi...

Femtosecond X-ray Tracking of Oxygen Vacancy-Driven Shallow-to-Deep Trap Transition and Its Impact on Charge Carrier Dynamics in Blue TiO2

Abstract Oxygen vacancies introduced by self-reduction are central to the enhanced light absorption and photocatalytic activity of blue TiO2, yet how they reshape the ultrafast dynamics of photogenerated charge carriers has remained unresolved. Here, we directly track these dynam...

C2f-space: coarse-to-fine space grounding for spatial instructions using vision-language models

Abstract Space grounding refers to localizing a set of spatial references described in natural language instructions. Traditional methods often fail to account for complex reasoning— such as distance, geometry, and inter-object relationships— while vision-language models (VLMs),...

A systematic interactome of Saccharomyces cerevisiae SET1C expands its functional landscape and identifies candidate regulatory connections

Set1 is the catalytic subunit of SET1C or COMPASS, which methylates histone H3K4 and serves as a scaffold for the association of seven tightly bound polypeptides. We have employed yeast two-hybrid screenings to determine the interactome of Set1 and each subunit, providing a uniqu...

Deep reinforcement learning-based position optimization model for intermediate discharge valves in a scroll compressor

Heating and cooling cycles can be controlled by changing the suction and discharge pressures of a scroll compressor. Over-pressurization caused by a low compression ratio induces work loss and may damage the structure of the scroll. This over-pressurization can be prevented by di...

Effects of Upstream Signal-Induced Arrival Interruptions on Delays at a Downstream Signalized Intersection

Delay is a critical measure when evaluating level of service under interrupted flow conditions and is widely used to assess operational improvements and optimize traffic signals. However, existing delay models often fail to capture the effects of arrival interruptions, which are...

Retrospective attention reveals a decaying theta rhythm in conscious access to a preceding stimulus

Conscious perception is often presumed to arise immediately upon external stimulation. However, retroperception—conscious access to a stimulus after it has disappeared—challenges this perspective by demonstrating temporally flexible awareness. The fine-grained temporal dynamics g...

Genistein as a potential hormetic regulator of proteostasis in neurodegeneration and aging

As global populations increase in age, the incidence of neurodegenerative diseases and dementia is rising; however, symptomatic and disease-modifying therapies deliver only modest benefits. This gap has fueled interest in aging-targeted interventions spanning lifestyle, nutrition...

Spontaneous formation of picoliter water bridges

Picoliter water, ubiquitous at the microscale and predominantly confined between solids, underpins critical physical, chemical, and biological processes. Although vapor diffusion governs water evaporation in air, and capillarity inhibits evaporation at the nanoscale, neither mech...

On Sidon sets with squares, cubes and quartics in short intervals

Abstract Representative examples of our results are as follows. For any positive integer $$N$$ N the equation $$x^3+y^3=z^3+t^3, \quad x,y,z,t\in \mathbb{N}, \quad \{x,y\}\not=\{z,t\}$$ x 3 + y 3 = z 3 + t 3 , x , y , z , t ∈ N , { x , y } ≠ { z , t } has no solutions satisfying...

Enhanced infrared-to-visible upconversion imaging via metasurface–lanthanide nanoparticle hybrid screens

Abstract Accessing the rich information carried by infrared light typically relies on bulky, complex optoelectronic systems. Lanthanide-based upconverting nanoparticles (UCNPs) offer a compelling alternative by converting infrared light into visible photons through nonlinear anti...

Spatial nonparametric Bayesian Poisson hurdle model for analyzing zero-inflated tick data

Abstract Severe fever with thrombocytopenia syndrome, an infectious tick-borne disease, has been increasingly reported in South Korea. Understanding the epidemiology of its vectors will help predict the spatio-seasonal abundance of ticks and manage future health risks related to...

Deterministic Switching‐Path Engineering of CMOS‐Integrated 2D Memristors for Neuromorphic Computing

ABSTRACT Two‐dimensional (2D) memristors are promising for low‐power and high‐speed neuromorphic hardware. However, their performance under circuit‐level constraints remains limited because resistive switching relies on native defects, hindering precise control of filament format...